CN111300226A

CN111300226A - Six-axis numerical control inner and outer circle composite grinding machine

Info

Publication number: CN111300226A
Application number: CN202010241164.9A
Authority: CN
Inventors: 胡功明
Original assignee: Wuhu Mjter Numerical Control Technology Co ltd
Current assignee: Wuhu Mjter Numerical Control Technology Co ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-06-19

Abstract

The application discloses a six-axis numerical control inner and outer circle composite grinding machine, wherein a dynamic and static pressure workpiece main shaft is arranged at the upper part of an X-axis mechanical structural part in the six-axis numerical control inner and outer circle composite grinding machine; a C-axis indexing rotary table is arranged at the upper part of an output panel of the first Z-axis mechanical structural part; the output end of the C-axis indexing rotary table is provided with a second Z-axis electric spindle translation mechanical structural part; the output panel of the second Z-axis electric spindle translation mechanical structural part is provided with a permanent magnet synchronous high-speed electric spindle; and a dynamic and static pressure main shaft grinding wheel shaft and an online three-dimensional measuring mechanism are arranged at the upper part of an output panel of the third Z-axis mechanical structural part. In the embodiment of the application, through the innovative design of a six-axis structural part, the one-time grinding result of an inner circle, an outer circle, an inner taper hole, an outer taper surface and an end surface is realized in the production process of one-time clamping, and a small micro inner hole of 0.5-3mm can be ground by additionally arranging the ultra-high-speed motorized spindle; through the innovative software design, the automatic compensation grinding wheel abrasion loss of the automatic rough grinding and accurate grinding dressing sand is achieved, the workpiece is automatically measured, and the online measurement result is automatically identified by software.

Description

Six-axis numerical control inner and outer circle composite grinding machine

Technical Field

The application relates to the technical field of numerical control grinding machines, in particular to a six-axis numerical control inner and outer circle composite grinding machine.

Background

The cylindrical grinding is mainly carried out on an external cylindrical grinder and is used for grinding the external cylinder, the external cone and the shaft shoulder end surface of the shaft workpiece; the inner circle grinding machine is mainly used for grinding inner holes and end faces of parts to ensure the accuracy of the inner holes and the end faces, equipment for grinding the inner holes is divided into a large inner hole, a small inner hole and a small inner hole, and due to different requirements on the rotating speed of a main shaft, the well-known equipment cannot realize multifunctional processing by one piece of equipment, and only large equipment for large holes and small equipment for small holes are used. In addition, the existing numerical control grinding machine equipment does not have a plurality of complex processes of grinding an outer circle surface, an outer circle end surface, an outer circle step surface, an outer circle taper surface, an inner hole plane, an inner hole end surface, an inner circle step surface and an inner taper surface at the same time, but various curved surfaces of the outer diameter and the inner diameter cannot be finished at one time, and a set of complete numerical control software for composite grinding of the inner circle and the outer circle is not provided, so that a plurality of existing high-precision products can be finished by multiple equipment and multiple processes through repeated clamping, and the precision is difficult to guarantee in the repeated assembly and disassembly processes.

Disclosure of Invention

In order to solve the technical problem, an innovative embodiment of the present application provides a six-axis numerical control internal and external composite grinding machine, which comprises a grinding machine base, six-axis mechanical structural components, a grinding wheel dressing mechanism, a sheet metal shell and a numerical control system, wherein the machine base is an iron casting or a natural granite or mineral casting; the six-axis mechanical structural part comprises an X-axis mechanical structural part, a first Z-axis mechanical structural part, a third Z-axis mechanical structural part, a second Z-axis electric spindle translation mechanical structural part, an indexing rotary table and an online three-dimensional measuring mechanism; the front side of the grinding machine base is an operation station, the direction of the operation station facing the machine tool base is taken as the front side, the direction parallel to the forward direction is marked as a Z axis, the direction vertical to the Z axis on the horizontal plane is an X axis, the forward direction of the X axis points to the operation station, and the forward direction of the Z axis points to the right side of the operation station; the grinding machine base is arranged to be integrally cast and molded in a cubic shape or cut and molded in a whole natural granite shape; the front side of the grinding machine base is used as an operation station, and the back side of the grinding machine base is provided with an oil running pipeline; a base plate is arranged on the grinding machine base; be provided with three installation region on the bed plate, be respectively: the left area is used for placing an X-axis mechanical structural part; the right side is close to the front area and is used for arranging a first Z-axis mechanical structural part, and the right side is close to the back area and is used for arranging a third Z-axis mechanical structural part; a dynamic and static pressure main shaft workpiece shaft structural part is arranged at the upper part of the X-axis mechanical structural part; the output end direction of the dynamic and static pressure main shaft workpiece shaft structural part is positioned on the right side, and the dynamic and static pressure main shaft workpiece shaft structural part is arranged along the Z axis; the X-axis mechanical structural part drives the dynamic and static pressure main shaft workpiece shaft structural part to move along the X-axis direction; the direction of the dynamic and static pressure main shaft workpiece shaft structural part is parallel to the Z axis, and the output end is positioned on the right side; the output end of the dynamic and static pressure main shaft workpiece shaft structural part is used for installing a machined part; an indexing rotary table is arranged on the upper part of an output panel of the first Z-axis mechanical structural part; the first Z-axis mechanical structural part drives the indexing rotary table to move along the Z-axis direction; the output end of the indexing rotary table is provided with a second Z-axis electric spindle translation mechanical structural part; the indexing rotary table controls the second Z-axis electric spindle translation mechanical structural part to rotate along the plane formed by the X axis and the Z axis; a permanent magnet synchronous high-speed electric spindle is arranged on an output panel of the second Z-axis electric spindle translation mechanical structural part, and the rotating speed is 5000 plus 30000 rpm; the output end of the permanent magnet synchronous high-speed electric main shaft faces the dynamic and static pressure main shaft workpiece shaft structural part; an inner hole grinding wheel is arranged at the output end of the permanent magnet synchronous high-speed electric main shaft; the second Z-axis electric spindle translation mechanical structural part is used for controlling the electric spindle to move in the moving direction of the output panel of the electric spindle; the side surface of the permanent magnet synchronous high-speed electric spindle and the side surface of the permanent magnet synchronous high-speed electric spindle are arranged at the same central height in parallel, the ultra-high-speed small electric spindle is arranged at the rotating speed of 5-15 ten thousand revolutions per minute, and small and micro inner holes are mainly ground; the upper part of an output panel of the third Z-axis mechanical structural part is provided with a dynamic and static pressure grinding wheel spindle structural part and an online three-dimensional measuring mechanism; the third Z-axis mechanical structural part drives the dynamic and static pressure grinding wheel spindle structural part and the online three-dimensional measuring mechanism to move along the Z-axis direction; the online three-dimensional measuring mechanism is positioned on the front side of the dynamic and static pressure grinding wheel spindle structural part; the online three-dimensional measuring mechanism comprises a trigger three-dimensional measuring head and a measuring head driving mechanism; the bottom of the measuring head driving mechanism is fixed on an output panel of a first Z-axis mechanical structural part, the output end of the measuring head driving mechanism is connected with the bottom of the trigger type three-dimensional measuring head, and the trigger type three-dimensional measuring head is controlled to move in the Z axial direction or rotate along a vertical plane on the output panel of the first Z-axis mechanical structural part, so that the trigger type three-dimensional measuring head can carry out online measurement on a workpiece on a dynamic and static pressure main shaft workpiece shaft structural part; the output end of the dynamic and static pressure grinding wheel spindle structural part is positioned on the left side; the shaft end of the dynamic and static pressure grinding wheel spindle is provided with a grinding wheel flange for grinding an excircle, the grinding wheel flange is provided with an online dynamic balance adjusting device, and the shaft end of the dynamic and static pressure grinding wheel spindle is provided with a rotary grinding wheel rod for assembling a grinding wheel for grinding a large inner hole; the grinding wheel for assembling and grinding the large inner hole is used for carrying out coarse grinding and fine grinding on the inner circle, the inner cone circle, the end surface of the inner hole, the outer cone surface and the small outer circle of the large and deep cavity of the processed workpiece; the outer circle grinding wheel is used for carrying out coarse grinding and fine grinding on the outer circle, the step surface of the outer circle and the end surface of the outer circle of the processed workpiece; the grinding wheel dressing mechanism is distributed on an output panel of the X-axis mechanical structural part, and grinding wheel dressing diamond pen support seats are respectively arranged on two sides of the output panel of the X-axis mechanical structural part by taking a dynamic and static pressure main shaft as the center; the grinding wheel correction diamond pen bracket seats are positioned on two sides of the box body of the dynamic and static pressure main shaft workpiece shaft structural part; the front end of each grinding wheel correction pen support is provided with two grinding wheel pens in different directions; on one grinding wheel correction pen support, a rear grinding wheel pen is used for trimming the grinding wheel end face and the side face of a dynamic and static pressure spindle excircle grinding wheel, a front grinding wheel pen is used for trimming the grinding wheel excircle and the end face of a high-speed electric spindle and an ultrahigh-speed electric spindle, on the other grinding wheel correction diamond pen support seat, one grinding wheel pen is used for trimming the end face of the grinding wheel, and the grinding wheel pen in the other direction is used for trimming the excircle of the grinding wheel; the output end of the dynamic and static pressure main shaft workpiece shaft structural part is provided with a diamond roller flange; the outer diameter surface of the flange plate can be provided with a diamond roller for trimming the outer circular surface of the grinding wheel; the side surface of the electric spindle and the side surface of the electric spindle are arranged in parallel at the same central height, and the electric spindle is provided with a super-high-speed small electric spindle, the rotating speed is 5-15 ten thousand revolutions per minute and is used for grinding small and micro inner holes; the indexing rotary table adopts a C-axis indexing rotary table or a direct-drive DDR indexing rotary table, and both the C-axis indexing rotary table and the direct-drive DDR indexing rotary table comprise built-in brakes; the sheet metal shell includes: the whole machine shell is arranged on the grinding machine base, and all structural parts are arranged in a cavity of the shell; the left and right horizontal pull type double-door structure is positioned on the front surface of the whole machine shell; the oil pipeline penetrates from the outside of the whole machine shell and extends into the whole machine shell; the numerical control system operation box is used for controlling the operation of the whole equipment and is provided with software, is positioned on the front surface of the whole machine shell and is positioned on the right side or the left side of the left and right sliding door structures; the numerical control system is embedded in the operation control machine box.

Further, the X-axis mechanical structure includes: an X-axis carriage: the grinding machine is positioned on the left area of the machine body of the grinding machine; the X-axis carriage is an embedded guide rail groove, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove adopts a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure; x axial lead screw actuating mechanism: the X-axis lead screw, the bearing seat, the bearing, the lead screw nut and the nut sleeve form a transmission precision structure; the X-axis screw rod adopts a high-precision screw rod with the grade of more than C3 and a small lead screw rod with the lead of less than 10, the bearing seats are combined and used by two front and rear bearing seats, each bearing seat is internally provided with 2 high-precision thrust bearings with the grade of more than 7 series P5 which are combined in a matched mode, the screw rod nut sleeve adopts a split nut sleeve, and the flange surface of the screw rod nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position on the carriage base through the bearing block, and the mounting position of the bearing block is lower than the surface of the guide rail sliding block; two sides of the screw rod are respectively provided with a linear guide rail, the slide block is arranged on the linear guide rails, and the output panel is arranged on the slide block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the nut and the output panel are driven to move on the guide rail when the feed screw rotates; along the X-axis direction, two sides of the output panel are connected with shaft seal plates and a cover body of the servo motor through an organ cover; side sealing plates are connected with the two sides of the output panel; the side sealing plates and the output panel organ cover form a sealing protection cover for the X-axis carriage assembly; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupling; a drag chain plate is arranged on the side surface of the X-axis drag plate; the upper part of the drag chain plate is fixedly connected with a connecting plate; the connecting plate is fixed with the side surface of the output panel; the bottom of the drag chain plate is provided with a lower fixing plate; the lower fixing plate is fixed on the side surface of the X-axis carriage.

Further, the dynamic and static pressure main shaft workpiece shaft structural part adopts a servo motor belt transmission or permanent magnet servo motor direct connection integrated transmission structure: when the dynamic and static pressure main shaft workpiece shaft structural part is driven by a servo motor belt, the dynamic and static pressure main shaft workpiece shaft structural part comprises an outer shell, a fixed plate, a motor and a rotating main shaft; the bottom of the outer shell is fixed on an output panel of the X-axis mechanical structural component and moves on the X axis along with the output panel; the fixed plate is vertical to the output panel and is positioned on the left side of the dynamic and static pressure main shaft workpiece shaft structural part; the motor and the rotating main shaft are distributed up and down on the fixed plate and are positioned on the right side of the fixed plate; the motor is provided with a motor cover; the output end of the motor is connected with a small belt pulley; the input end of the rotating main shaft is provided with a large belt pulley; the small belt pulley and the large belt pulley are positioned on the left side of the fixing plate and are connected through a synchronous belt; the output end of the rotating main shaft is provided with a connecting flange; a rotary oil hydraulic cylinder or a rotary air cylinder is additionally arranged at the input end of a large belt pulley of a dynamic and static pressure main shaft workpiece shaft structural member; a pull rod is additionally arranged at the central hole of the rotating main shaft, and a hydraulic three-grab or elastic chuck arranged at the output end of the rotating main shaft is tightened or loosened to further clamp the processed workpiece; the output end of the rotating main shaft is additionally provided with a switching flange or a permanent magnetic circular sucker or a manual three-grab chuck for clamping a workpiece; the permanent magnetic circular sucker is used for sucking a machined workpiece with higher precision; when the dynamic and static pressure main shaft workpiece shaft structural member adopts a permanent magnet servo motor direct connection integrated type, the dynamic and static pressure main shaft workpiece shaft structural member comprises a main shaft mandrel, a main shaft permanent magnet servo motor, a main shaft shell, a main shaft installation box body and a main shaft oil pressure station mechanism; the main shaft oil pressure station mechanism supplies oil to a main shaft cavity arranged in a main shaft installation box body; an oil inlet and an oil outlet are formed in the main shaft shell; the spindle shaft is divided into an output part and an input part; the input part of the spindle mandrel is positioned in a rotor inner hole mandrel of the servo motor, and a coaxial integrated mandrel structure is formed between the servo motor and the spindle mandrel; the thrust tin bronze sleeve, the box body shaft front cover, the radial thrust tin bronze sleeve and the radial inner support tin bronze sleeve are sequentially arranged on the outer side of the output part of the spindle shaft along the direction from the output end to the input end; sleeve shafts of the main shaft shell are arranged outside the radial thrust tin bronze sleeve and the radial inner support tin bronze sleeve; the front end of the output part of the spindle mandrel is connected with a spindle front end output adapter flange; a main shaft mandrel thrust flange is arranged at the rear end of the bearing of the thrust tin bronze sleeve, and the bearing of the radial thrust tin bronze sleeve is positioned at the rear end of the main shaft mandrel thrust flange; a flange surface is arranged on the radial outer side of the thrust tin bronze sleeve; the bearing for radially supporting the tin bronze sleeve is positioned on the outer surface of one side of the output part of the spindle; the radial thrust tin bronze sleeve bearing and the radial tin bronze sleeve bearing are both positioned on the inner side of the shell of the main shaft shell; the spindle shell penetrates through the spindle mounting box body and is fixed with the front end of the spindle mounting box body; a shell of the servo motor is fixed with the rear end of the main shaft installation box body through a bolt; the servo motor includes: the device comprises a main shaft permanent magnet servo motor rotor, a main shaft permanent magnet servo motor stator, a permanent magnet servo motor cooling water jacket, a hollow servo permanent magnet motor absolute value encoder, a rear oil hydraulic cylinder connecting flange and a rear oil hydraulic rotary cylinder or air pressure cylinder; the spindle permanent magnet servo motor rotor, the spindle permanent magnet servo motor stator, the permanent magnet servo motor cooling water jacket and the shell of the servo motor are sequentially positioned on the outer wall of the input part of the spindle from inside to outside; the main shaft permanent magnet servo motor rotor is connected with a main shaft mandrel through an inner bushing and is fixedly installed in a mode of an expansion sleeve and a gland fastening bolt; the shell of the permanent magnet servo motor is cylindrical, the mounting end is flange-shaped, the other end is a power line outlet end, a sealing end cover is arranged, and a hollow servo permanent magnet motor absolute value encoder is fixedly mounted on the outer side of the sealing end cover; the sealing end cover is provided with a central control encoder sealing end cover; the hollow servo permanent magnet motor absolute value encoder is positioned in the sealed end cover of the central control encoder and is connected with the outside through the outgoing line sealed joint of the permanent magnet servo motor; the input part of the spindle shaft extends out of a rear end sealing end cover of a shell of the permanent magnet servo motor, and the end part of the spindle shaft is connected with a mounting flange of a hydraulic oil cylinder through a bolt; the mounting flange of the hydraulic oil cylinder is connected with a rear oil hydraulic cylinder connecting flange through a bolt; the spindle mandrel, the spindle mounting box body, the servo motor and the encoder form a full-sealed three-proofing structure; a rear oil pressure rotary cylinder or a pneumatic cylinder is used as a main shaft workpiece rapid clamping and fixing mechanism; the spindle is of a hollow structure and is used for penetrating through the pull rod or communicating with the pull rod to process and produce cutting fluid; the box body shaft front cover is provided with a sealing ring for sealing the thrust tin bronze sleeve bearing; the main shaft mounting box body is of a polyhedral cavity structure, wherein a cavity is formed inside the box; two ends of the main shaft mounting box body are used for supporting and fixing the main shaft; the bottom surface of the main shaft mounting box body is provided with reinforcing ribs in a small square cavity in a clearance mode, and a guide sliding groove is formed in the middle of the base; the front end and the rear end of the box body are installed on the main shaft, a plurality of weight avoiding holes are arranged below the bottom and the hole of the main shaft shell, reinforcing ribs are arranged between the holes and the hole wall, oil return port threaded holes are formed in two sides of the bottom of the box body, oil inlet threaded holes are formed in the upper portion of the box body, and a sealing cover plate is arranged at the top of the box body and locked in and installed through bolts; the shell of the permanent magnet servo motor is connected with the main shaft mounting box, and the shell of the permanent magnet servo motor is sleeved on the excircle of the cooling water jacket of the permanent magnet servo motor; one end of a shell of the permanent magnet servo motor is provided with a cooling liquid inlet joint, the other end of the shell is provided with a liquid return outlet, and heat generated when the main shaft rotates is taken away through circulation of circulating liquid; the absolute value encoder of the hollow servo permanent magnet motor consists of an outer magnetic ring, an inner magnetic ring and an encoder reading head, wherein the inner magnetic ring is fixed on a spindle shaft, and the outer magnetic ring and the encoder reading head are fixed on the outer side of a sealing end cover; the inner hole of the spindle mandrel is provided with an inner taper hole of BT or Mohs structure.

Further, the first Z-axis mechanical structure includes: a first Z-axis carriage: the guide rail groove of the first Z-axis carriage is embedded, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove adopts a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure; first Z axial lead screw actuating mechanism: the transmission precision structure comprises a Z-axis screw rod, a bearing seat, a bearing and a screw rod nut sleeve; the Z-axis screw rod adopts a high-precision screw rod with the grade of more than C3 and a small lead screw rod with the lead of less than 10, the bearing seats are combined and used by two front and rear bearing seats, each bearing seat is internally provided with 2 high-precision thrust bearings with the grade of more than 7 series P5 which are combined in a matched mode, the screw rod nut sleeve adopts a split nut sleeve, and the flange surface of the nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position on the carriage base through the bearing block, and the mounting position of the bearing block is lower than the guide rail surface; two sides of the screw rod are respectively provided with a linear guide rail, the slide block is arranged on the linear guide rails, and the output panel is arranged on the slide block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the nut and the output panel are driven to move on the guide rail when the feed screw rotates; along the Z-axis direction, two sides of the output panel are connected with the shaft sealing plate and the cover body of the servo motor through the organ cover; side sealing plates are connected with the two sides of the output panel; the Z-axis carriage assembly is formed into a sealing protection cover by the side sealing plates and the output panel organ cover; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupling; the servo motor is positioned on the right side of the first Z-axis lead screw driving mechanism; a drag chain plate is arranged on the front surface of the first Z-axis drag plate; the upper part of the drag chain plate is fixedly connected with a connecting plate; the connecting plate is fixed with the side surface of the output panel; the bottom of the drag chain plate is provided with a lower fixing plate; the lower fixing plate is fixed on the side surface of the Z-axis carriage.

Furthermore, the C-axis indexing rotary table comprises a box body, a motor base, an input shaft, an output shaft, an inner bearing, an outer bearing, a servo motor, a zero-clearance coupling, an output disc and a framework oil seal structure; the input shaft and the output shaft are mounted to the box; the input shaft drives the output shaft to rotate around the central axis; the zero-clearance coupling is connected with a motor shaft and an input shaft of the servo motor; the output shaft is provided with a through hole for a power supply line and/or a water pipe to pass through; the through hole penetrates through the output shaft along the central axis; the inner bearing is arranged in the through hole; the outer ring of the inner bearing is contacted with the inner wall of the through hole; the box body is provided with an outlet hole for the electric wire and/or the water pipe passing through the through hole to pass through; the motor base is fixed to the input end of the box body; the servo motor is mounted to the motor base; the hole depth direction of the wire outlet hole is vertical to the hole depth direction of the through hole and is parallel to the rotation axis of the input shaft; the input shaft is a double-enveloping cambered surface worm; a plurality of needle roller bearings are arranged on the periphery of the output shaft; the plurality of needle roller bearings are uniformly distributed along the circumferential direction of the central axis; the outer bearing is sleeved on the periphery of the output shaft; the outer bearing is a crossed roller bearing or a turntable bearing, and the inner ring and the outer ring of the bearing are fixed by bolts; the output disc is fixed to the output shaft; the output disc and the bearing gland form a waterproof labyrinth structure; the framework oil seal structure is arranged on the periphery of the output shaft; the outer bearing is provided with a bearing gland used for fixing the position of the outer bearing; the bearing gland is fixed on the box body; the box body is provided with an outer arc surface and a weight-reducing groove; the outer cambered surface and the weight reduction groove are positioned on two sides of the box body.

Further, the second Z-axis motorized spindle translation mechanical structure comprises: planker: the guide rail groove of the carriage is embedded, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove adopts a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure; the carriage is fixed on the fixed seat; the screw rod driving mechanism comprises: the transmission precision structure comprises a screw rod, a bearing seat, a bearing and a screw rod nut sleeve; the lead screw adopts a high-precision lead screw with a grade above C3 and a small lead screw with a lead below 10, the bearing seats are combined by a front bearing seat and a rear bearing seat, each bearing seat is internally provided with 27 series high-precision thrust bearings with the grade above P5 which are combined in a matched mode, the lead screw nut sleeve adopts a split nut sleeve, and the flange surface of the nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position on the carriage base through the bearing block, and the mounting position of the bearing block is lower than the guide rail surface; two sides of the screw rod are respectively provided with a linear guide rail, the slide block is arranged on the linear guide rails, and the output panel is arranged on the slide block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the nut and the output panel are driven to move on the guide rail when the feed screw rotates; two sides of the output panel are connected with the shaft seal plate and the cover body of the servo motor through the organ cover; side sealing plates are connected with the two sides of the output panel; the carriage assembly is formed into a sealing protection cover by the side sealing plate and the output panel organ cover; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupling; the servo motor is positioned on the right side of the screw rod driving mechanism; the output panel is provided with a permanent magnet synchronous high-speed electric main shaft; the rotating speed of the electric spindle is 5000 plus 30000 revolutions per minute; the output end of the electric main shaft faces the static pressure main shaft workpiece shaft structural part; an inner circle grinding wheel is arranged at the output end of the electric spindle.

Further, the third Z-axis mechanical structure comprises: a third Z-axis carriage: the guide rail groove of the third Z-axis carriage is embedded, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove adopts a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure; the third Z-axis screw rod driving mechanism: the transmission precision structure comprises a Z-axis screw rod, a bearing seat, a bearing and a screw rod nut sleeve; the Z-axis screw rod adopts a high-precision screw rod with the grade of more than C3 and a small lead screw rod with the lead of less than 10, the bearing seats are combined and used by two front and rear bearing seats, each bearing seat is internally provided with 2 high-precision thrust bearings with the grade of more than 7 series P5 which are combined in a matched mode, the screw rod nut sleeve adopts a split nut sleeve, and the flange surface of the nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position on the carriage base through the bearing block, and the mounting position of the bearing block is lower than the guide rail surface; two sides of the screw rod are respectively provided with a linear guide rail, the slide block is arranged on the linear guide rails, and the output panel is arranged on the slide block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the nut and the output panel are driven to move on the guide rail when the feed screw rotates; along the Z-axis direction, two sides of the output panel are connected with the shaft sealing plate and the cover body of the servo motor through the organ cover; side sealing plates are connected with the two sides of the output panel; the Z-axis carriage assembly is formed into a sealing protection cover by the side sealing plates and the output panel organ cover; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupling; the servo motor is positioned on the right side of the third Z-axis lead screw driving mechanism; a drag chain plate is arranged on the back surface of the third Z-axis drag plate; the upper part of the drag chain plate is fixedly connected with a connecting plate; the connecting plate is fixed with the side surface of the output panel; the bottom of the drag chain plate is provided with a lower fixing plate; the lower fixing plate is fixed on the side surface of the Z-axis carriage.

Furthermore, a measuring head driving mechanism adopts a U-axis translation mechanical structural part or a B-axis indexing table; when the measuring head driving mechanism adopts a U-axis translation mechanical structural part, the U-axis mechanical structural part comprises a U-axis carriage, a U-axis module, a U-axis servo motor and a U-axis organ cover; the bottom of the U-axis carriage is arranged on an output panel of a third Z-axis mechanical structural part, and the U-axis module is arranged on the U-axis carriage; a nut sleeve is fixedly arranged on a U-axis output panel of the U-axis module, a U-axis screw rod is fixedly arranged in the U-axis module, two ends of the U-axis screw rod are arranged in the U-axis module through a U-axis bearing seat, and the U-axis module is transversely arranged on a U-axis carriage through the matching of the U-axis screw rod and the nut sleeve; the U-axis module is externally covered with U-axis organ covers at two ends of the U-axis output panel, the U-axis organ covers are in a square-tube integral sealing seamless design and are connected with a side plate metallographic phase of the U-axis output panel to form a closed movable cavity; the U-axis servo motor is positioned on the right side of the U-axis mechanical structural part, and the output end of the U-axis servo motor is connected with the input end of a U-axis screw rod through a zero-clearance coupling; when the measuring head driving mechanism adopts a B-axis indexing table, the measuring head driving mechanism comprises a harmonic speed reducer bracket, a harmonic speed reducer, a servo motor and a motor cover; the harmonic speed reducer support is fixed on an output panel of the first Z-axis mechanical structural part; the harmonic speed reducer is vertically fixed on the harmonic speed reducer support, and the output direction of the harmonic speed reducer is a Z-axis vertical plane and faces backwards; the output end of the servo motor is connected with the input end of the harmonic reducer; the output end of the harmonic speed reducer is fixedly connected with the bottom side surface of the trigger type three-dimensional measuring head through a bolt.

Further, the dynamic and static pressure grinding wheel spindle structure adopts a servo motor belt transmission or permanent magnet servo motor direct connection integrated transmission structure: when the dynamic and static pressure grinding wheel spindle structural part adopts servo motor belt transmission, the dynamic and static pressure grinding wheel spindle structural part comprises an outer shell, a fixed plate, a motor and a rotating spindle; the bottom of the fixed plate is fixed on an output panel of the third Z-axis carriage and moves on the Z axis along with the output panel; the motor and the rotating main shaft are distributed up and down on the fixing plate, and a middle fixing plate is arranged between the motor and the rotating main shaft; the rotating main shaft is parallel to the Z axis, and the output end faces the left side; the motor is provided with a motor cover; the output end of the motor is arranged on the right side and is connected with a small belt pulley; the input end of the rotating main shaft is positioned on the right side and is provided with a large belt pulley; the small belt pulley and the large belt pulley are connected through a synchronous belt; the output end of the rotating main shaft is connected with a large grinding wheel; the excircle grinding wheel of the grinding wheel shaft of the dynamic and static pressure main shaft is connected through a taper hole flange plate, and the outer side of the flange plate is provided with a dynamic balance adjusting balancing weight or an adjusting screw; the output shaft end of the dynamic and static pressure main shaft grinding wheel shaft is provided with a reverse thread external thread or a grinding wheel connecting rod connected with an internal thread hole; when the grinding wheel connecting rod is installed, a cup-shaped grinding wheel for grinding an inner hole is additionally installed on the grinding wheel connecting rod and is used for grinding a large inner hole; when the dynamic and static pressure grinding wheel spindle structural part adopts a permanent magnet servo motor direct connection integrated type, the dynamic and static pressure grinding wheel spindle structural part comprises a spindle mandrel, a spindle permanent magnet servo motor, a spindle shell, a spindle mounting box body and a spindle oil pressure station mechanism; the main shaft oil pressure station mechanism supplies oil to a main shaft shell cavity arranged in a main shaft installation box body; an oil inlet, an oil outlet and a sealing element are arranged on the main shaft shell; the spindle shaft is divided into an output part and an input part; the input part of the spindle mandrel is positioned in a rotor inner hole mandrel of the servo motor, and a coaxial integrated mandrel structure is formed between the servo motor and the spindle mandrel; the thrust tungsten steel sleeve bearing, the thrust flange of the spindle, the radial thrust tungsten steel sleeve bearing and the radial inner support tungsten steel sleeve bearing are sequentially arranged on the outer side of the output part of the spindle along the direction from the output end to the input end; sleeve shafts of the main shaft shell are arranged outside the radial thrust tungsten steel sleeve bearing and the radial inner support tungsten steel sleeve bearing; a flange surface is arranged on the radial outer side of the thrust tungsten steel sleeve bearing; the bearing for radially supporting the tungsten steel sleeve bearing is positioned on the outer surface of one side of the output part of the spindle; the radial thrust tungsten steel sleeve bearing and the radial tungsten steel sleeve bearing are both positioned on the inner side of the shell of the main shaft shell; a box body shaft front cover is arranged on one side of the output end of the spindle mandrel of the spindle shell; the inner side of the box body shaft front cover is matched with the thrust tungsten steel sleeve bearing for sealing; the spindle shell penetrates through the spindle mounting box body and is fixed with the front end of the spindle mounting box body; a shell of the servo motor is fixed with the rear end of the main shaft installation box body through a bolt; the servo motor includes: the device comprises a main shaft permanent magnet servo motor rotor, a main shaft permanent magnet servo motor stator, a permanent magnet servo motor cooling water jacket, a hollow servo permanent magnet motor absolute value encoder, a rear oil hydraulic cylinder connecting flange and a rear oil hydraulic rotary cylinder or air pressure cylinder; the spindle permanent magnet servo motor rotor, the spindle permanent magnet servo motor stator, the permanent magnet servo motor cooling water jacket and the shell of the servo motor are sequentially positioned on the outer wall of the input part of the spindle from inside to outside; the main shaft permanent magnet servo motor rotor is connected with a main shaft mandrel through an inner bushing and is fixedly installed in a mode of an expansion sleeve and a gland fastening bolt; the shell of the permanent magnet servo motor is cylindrical, the mounting end is flange-shaped, the other end is a power line outlet end, a sealing end cover is arranged, and a hollow servo permanent magnet motor absolute value encoder is fixedly mounted on the outer side of the sealing end cover; the sealing end cover is provided with a central control encoder sealing end cover; the hollow servo permanent magnet motor absolute value encoder is positioned in the sealed end cover of the central control encoder and is connected with the outside through the outgoing line sealed joint of the permanent magnet servo motor; the input part of the spindle shaft extends out of a rear end sealing end cover of a shell of the permanent magnet servo motor, and the end part of the spindle shaft is connected with a mounting flange of a hydraulic oil cylinder through a bolt; the mounting flange of the hydraulic oil cylinder is connected with a rear oil hydraulic cylinder connecting flange through a bolt; the spindle mandrel, the spindle mounting box body, the servo motor and the encoder form a full-sealed three-proofing structure; a rear oil pressure rotary cylinder or a pneumatic cylinder is used as a main shaft workpiece rapid clamping and fixing mechanism; the input part of the spindle shaft is of a hollow structure, and the output part of the spindle shaft is of a solid structure; the output end of the output part of the spindle adopts a flat end structure and is used for connecting an output grinding wheel flange; the output end of the output part of the spindle adopts an external conical structure and is used for connecting an internal conical grinding wheel flange; the grinding wheel flange plate is provided with an online dynamic balance adjusting block and a plurality of adjusting bolts; the output end of the output part of the spindle is provided with a reverse thread for installing a flange fastening nut or switching a small-diameter grinding wheel shaft lever or a boring cutter or a milling cutter head, the periphery of the grinding wheel lever is provided with a plurality of dynamic balance adjusting bolts, and the grinding wheel lever locking nut is provided with a plurality of dynamic balance adjusting bolts; the grinding wheel shaft rod is used for grinding the inner hole and the inner wall of the workpiece; the hollow structure part of the spindle mandrel is introduced into a cooling reflux circulating device, the input end of the input part of the spindle mandrel is provided with a high-pressure oil inlet hole which shares an oil outlet with the cavity of the spindle shell to form a sealed liquid flow circulating inner cavity; the oil inlet is provided with a switching rolling seal bearing and a switching flange, and when the spindle of the main shaft rotates at a high speed, a connected hydraulic pipe joint and a pipeline are not moved; a plurality of small holes for refrigeration reflux are arranged in the spindle shaft; the box body shaft front cover is provided with a sealing ring for sealing the thrust tungsten steel sleeve bearing; the main shaft mounting box body is of a polyhedral cavity structure, wherein a cavity is formed inside the box; two ends of the main shaft mounting box body are used for supporting and fixing the main shaft; the bottom surface of the main shaft mounting box body is provided with reinforcing ribs in a small square cavity in a clearance mode, and a guide sliding groove is formed in the middle of the base; the front end and the rear end of the box body are installed on the main shaft, a plurality of weight avoiding holes are arranged below the bottom and the hole of the main shaft shell, reinforcing ribs are arranged between the holes and the hole wall, oil return port threaded holes are formed in two sides of the bottom of the box body, oil inlet threaded holes are formed in the upper portion of the box body, and a sealing cover plate is arranged at the top of the box body and locked in and installed through bolts; the shell of the permanent magnet servo motor is connected with the main shaft mounting box, and the shell of the permanent magnet servo motor is sleeved on the excircle of the cooling water jacket of the permanent magnet servo motor; one end of a shell of the permanent magnet servo motor is provided with a cooling liquid inlet joint, the other end of the shell is provided with a liquid return outlet, and heat generated when the main shaft rotates is taken away through circulation of circulating liquid; the absolute value encoder of the hollow servo permanent magnet motor consists of an outer magnetic ring, an inner magnetic ring and an encoder reading head, wherein the inner magnetic ring is fixed on a spindle shaft, and the outer magnetic ring and the encoder reading head are fixed on the outer side of a sealing end cover; the inner hole of the spindle mandrel is provided with an outer cone of BT or Mohs structure and a screw with reverse thread.

Furthermore, the outer circle grinding wheel of the grinding wheel shaft of the dynamic and static pressure main shaft is connected through a taper hole flange, and the outer side of the flange is provided with a dynamic balance adjusting balancing weight or an adjusting screw; the output shaft end of the dynamic and static pressure main shaft grinding wheel shaft is provided with a reverse thread external thread or a grinding wheel connecting rod connected with an internal thread hole; when the grinding wheel connecting rod is installed, a cup-shaped grinding wheel for grinding an inner hole is additionally installed on the grinding wheel connecting rod and is used for grinding a large inner hole, the linear speed of the grinding wheel cannot follow up due to the limitation of the rotating speed of the dynamic and static pressure main shaft of 2000-3000 revolutions, and the inner hole can be ground by the dynamic and static pressure main shaft above 120 MM.

In the embodiment of the application, the grinding of the inner circle and the outer circle is realized through the arrangement of the six-shaft structural part, meanwhile, the requirements of coarse grinding and fine grinding can be met, and the grinding precision is high; after the second Z-axis electric spindle translation mechanical structural part is added, the depth of the whole grinding inner circle cutting process can be improved, and the angle range of the processed cone angle can be expanded; the grinding device can realize one-time grinding results of the inner circle, the outer circle, the inner taper hole, the outer taper surface and the end surface in the production process of one-time clamping, and can grind a small micro inner hole of 3MM-1MM by additionally arranging the super-high-speed spindle; meanwhile, by means of innovative software design, the automatic compensation grinding wheel abrasion loss of the coarse grinding and fine grinding automatic dressing sand is achieved, the workpiece is automatically measured, and the online measurement result is automatically identified by software.

Drawings

FIG. 1 is a schematic view of the overall apparatus of the present application; FIG. 2 is a schematic view of the overall apparatus of FIG. 1; FIG. 3 is a schematic mechanical view of the grinder base; FIG. 4 is a schematic perspective view of the bed; FIG. 5 is a schematic illustration of the present application with the sheet metal shell removed; FIG. 6 is a schematic structural diagram of a case of using a permanent magnet servo motor direct-connection integrated spindle; FIG. 7 is a schematic top view of the structure of FIG. 6; FIG. 8 is a schematic front view of the structure of FIG. 6; FIG. 9 is a schematic view of the mechanical structure above the left region A; FIG. 10 is a schematic view of the internal structure of the X-axis mechanical structure; FIG. 11 is a schematic view of the structure of FIG. 9 with the housing removed; FIG. 12 is a schematic view of the mechanical structure above the right side-by-front area B; FIG. 13 is a schematic top view of the structure of FIG. 12; FIG. 14 is a schematic mechanical diagram of the right side over the back area C; FIG. 15 is a schematic view of the structure of FIG. 14 with the outer shell removed; FIG. 16 is a schematic view of a C-axis index rotary table; FIG. 17 is a partial schematic view of a C-axis index rotary table; fig. 18 is a sectional view of the C-axis index rotary table; FIG. 19 is a schematic view of a C-axis index rotary table; FIG. 20 is a schematic view of the needle bearing of the C-axis indexing rotary table mounted to the output shaft; fig. 21 is a sectional view of the needle roller bearing of the C-axis indexing rotary table mounted to the output shaft; FIG. 22 is a perspective view of the overall construction of the hybrid spindle workpiece shaft structure; FIG. 23 is a schematic cross-sectional structural view of a hybrid spindle workpiece shaft structure; FIG. 24 is a cross-sectional structural view of the spindle mandrel of the hybrid spindle workpiece shaft configuration; FIG. 25 is a schematic cross-sectional view of the spindle of the hybrid spindle workpiece shaft construction; FIG. 26 is a schematic cross-sectional view of a spindle mounting housing of the hybrid spindle workpiece shaft structure; FIG. 27 is a schematic view of a structure of a spindle output end of a hybrid spindle workpiece shaft with a suction cup; FIG. 28 is a schematic cross-sectional view of a spindle structure of a hybrid spindle; FIG. 29 is a schematic view of the spindle connecting the structural components of the internal grinding wheel; FIG. 30 is a schematic view of the spindle output connected to a grinding wheel; FIG. 31 is a schematic view of the structure of the grinding wheel pen inside the complete machine; FIG. 32 is a top perspective view of FIG. 31; FIG. 33 is a schematic sectional view of the on-line three-dimensional measuring mechanism using the B-axis index table; FIG. 34 is a state view of the measuring head of FIG. 33 when not in use; FIG. 35 is a schematic view of the right side cross-sectional structure of FIG. 33; FIG. 36 is a schematic view of the structure of the on-line three-dimensional measuring mechanism using a U-axis translation mechanical structure; FIG. 37 is a schematic view of the right side cross-sectional structure of FIG. 36; FIG. 38 is a top cross-sectional structural view of the U-axis translation mechanical feature; 39-443 are schematic views of five major operational interfaces of a numerical control system.

The meaning of the reference symbols in the figures: 100-grinding machine base, 101-base plate, 102-oil outlet pipe, 200-sheet metal shell, 201-oil mist separator, 202-shell, 203-left and right sliding door structure, 204-oil pipeline, 205-control cabinet, 300-X axis mechanical structure, 301-X axis carriage, 302-output panel, 303-organ cover, 304-motor cover, 305-X axis screw rod, 306-bearing seat, 307-screw rod nut sleeve, 308-coupler, 309-motor, 310-lower fixed plate, 311-carriage plate, 312-connecting plate, 313-closing plate, 400-dynamic and static pressure main shaft workpiece shaft structure, 401-shell, 402-motor cover, 403-flange, 404-rotating main shaft, 405-motor, 406-fixed plate, 407-small belt pulley, 408-large belt pulley, 4100-spindle mandrel, 4200-spindle permanent magnet servo motor, 4300-spindle installation box, A-output part, B-input part, 4501-bolt, 4101-thrust tin bronze cover, 4102-box shaft front cover, 4103-spindle mandrel thrust flange, 4104-radial thrust tin bronze cover, 4105-radial inner support tin bronze cover, 4106-fastening bolt, 4107-spindle front end output adapter flange, 4108-spindle taper hole, 4109-spindle housing, 4111-permanent magnet chuck, 4201A-servo motor cooling water inlet, 4201B-servo motor cooling water outlet, 4202-oil pipe joint, 4203-permanent magnet servo motor cooling water jacket, 4204-permanent magnet servo motor rotor, 4205-stator of a main shaft permanent magnet servo motor, 4206-absolute value encoder of a hollow servo permanent magnet motor, 4207-connecting flange of a rear oil hydraulic cylinder, 4208-sealing end cover, 4209-sealing end cover of a central control encoder, 4210-shell, 4211-outlet sealing joint of a permanent magnet servo motor, 4212-hydraulic cylinder or air cylinder, 4216-oil inlet, 4217-oil outlet, 4218-cavity, 4301-hydraulic oil inlet, 4302-hydraulic oil outlet, 4303-guide sliding groove, 4304-upper box sealing cover, 4305-side wall of box, 4306-front inner hole wall of box, 4307-flange fixing screw hole of main shaft shell, 4308-avoiding space in box, 500-first Z-axis mechanical structural member, 501-X-axis carriage, 502-output panel, 503-organ cover, 504-motor cover, 505-lower fixing plate, 506-drag chain plate, 507-connecting plate, 508-closing plate, 600-C shaft indexing rotary table, 601-shell, 602-harmonic generator, 603-fixing seat, 604-electric spindle, 605-internal grinding wheel, 6100-numerical control transmission indexing mechanism, 610-box body, 610-outlet hole, 612-external arc surface, 620-input shaft, 630-output shaft, 631-internal bearing, 632-through hole, 633-needle bearing, 634-external bearing, 640-servo motor, 641-zero clearance coupling, 650-motor seat, 6180-motor cover, 660-bearing gland, 670-output disc, 680-skeleton oil seal structure, 6101-central axis, 6102-weight reduction groove, 700-third Z-axis mechanical structural part, 701-X-axis planker, 702-output panel, 703-organ cover, 704-motor cover, 705-lower fixing plate, 706-drag chain plate, 707-connecting plate, 708-sealing plate, 800-dynamic and static pressure spindle grinding wheel shaft structural part, 801-external grinding wheel, 802-fixing plate, 803-rotating spindle, 804-motor, 805-small belt pulley, 806-large belt pulley, 807-middle fixing plate, 808-baffle, 809-outer shell, 8100-spindle mandrel, 8200-spindle permanent magnet servo motor, 8501-bolt, 8101-thrust tungsten steel sleeve bearing, 8102-box shaft front cover, 8103-spindle thrust flange, 8104-radial thrust tungsten steel sleeve bearing, 8105-radial internal support tungsten steel sleeve bearing, 8106-fastening bolt, 8107-main shaft front end output adapter flange, 8108-main shaft center taper hole, 8109-main shaft shell, 8111-permanent magnetic chuck, 8112-tip, 8113-hydraulic chuck, 8114-claw, 8115-main shaft output end fastening thread, 8116-main shaft output end concentric positioning step, 8117-main shaft output end outer cone, 8118-main shaft inner oil return port, 8201A-servo motor cooling water inlet, 8201B-servo motor cooling water outlet, 8202-oil pipe joint, 8203-permanent magnetic servo motor cooling water jacket, 8204-main shaft permanent magnetic servo motor rotor, 8205-main shaft permanent magnetic servo motor stator, 8206-hollow servo permanent magnetic motor absolute value encoder, 8207-rear pull oil hydraulic cylinder connecting flange, 8208-sealing end cover, 8209-central control encoder sealing end cover, 8210-shell, 8211-permanent magnet servo motor outgoing line sealing joint, 8212-hydraulic oil cylinder or air cylinder, 8213-oil inlet joint, 8214-central control sealing joint sealing bearing, 8215-connecting bolt, 8216-oil inlet hole, 8217-oil outlet hole, 8218-cavity, 8401-fastening thread (reverse thread), 8402-internal grinding wheel extension rod, 8403-multi-hole position adjusting dynamic balance screw hole around circumference, 8404-internal or internal grinding wheel, 8405-grinding wheel locking nut, 8406-multi-hole position adjusting dynamic balance screw hole around circular plane, 8601-external grinding wheel, 8602-grinding wheel fastening flange cover, 8603-dynamic balance adjusting moving block, 8604-dynamic balance adjusting outer moving block, 900-second Z-axis electric spindle translation mechanical structural component, 901-dragging plate, 902-motor cover, 903-an output panel, 904-an organ cover, 905-a sealing plate, 1001-a grinding wheel pen, 1002-a diamond roller, 1003-a connecting seat, 1101-a measuring head, 1102-a measuring head support, 1103-a harmonic speed reducer, 1104-a fixing seat, 1105-a servo motor, 1106-an extension rod, 1107-a bolt, 1108-a measuring head support, 1109-a servo motor, 1112-U shaft screw rod, 1113-a coupler, 1114-U shaft module output panel and 1115-U shaft organ cover.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments. In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

In this application, for convenience of description, as shown in fig. 1/2, the front surface of the grinding machine base 100 is an operation station, the direction of the operation station toward the machine tool base is a front surface (that is, the face facing direction of the human face is a forward direction), the direction parallel to the forward direction is a Z-axis, the direction perpendicular to the Z-axis on the horizontal plane is an X-axis, the X-axis is directed to the operation station in the forward direction, the Z-axis is directed to the right side of the operation station in the forward direction, and the Y-axis is perpendicular to the plane formed by the X-axis and the Z-axis and directed upward. The front, rear, left, right, upper and lower are described with reference to fig. 1.

The embodiment of the application provides a six-axis numerical control inner and outer circle composite grinding machine, including grinding machine base 100, six mechanical structure spare, panel beating shell 200 and numerical control system, the machine tool base is the ironcasting in this embodiment, and six mechanical structure spare includes X axle mechanical structure spare 300, first Z axle mechanical structure spare 500, third Z axle mechanical structure spare 700, the electric main shaft translation mechanical structure spare of second Z axle and C axle graduation revolving stage. In the present application, the structures of the X-axis mechanical structure 300, the first Z-axis mechanical structure 500, the third Z-axis mechanical structure 700, and the second Z-axis electrical spindle translation mechanical structure are similar, and only the internal structure of the X-axis mechanical structure 300 is disclosed in the drawings as an example. As shown in fig. 3, the grinding machine base 100 is formed by casting a cube integrally, the front side of the grinding machine base 100 serves as an operation station, and the back side of the grinding machine base is provided with an oil running pipeline for flowing out cooling oil in the whole grinding machine. Be provided with bed plate 101 on the grinding machine base 100, be provided with three installation region on the bed plate 101, be respectively: a left area a for placing the X-axis mechanical structure 300; a right front-side area B for arranging the first Z-axis mechanical structure 500, and a right back-side area C for arranging the third Z-axis mechanical structure 700.

In this embodiment, the X-axis mechanical structure 300, the first Z-axis mechanical structure 500, and the third Z-axis mechanical structure 700 are distributed in the direction of the X-axis or the Z-axis, and since the output panel of the first Z-axis mechanical structure 500 is connected to the C-axis indexing rotary table, the output panel thereof corresponds to a grinding wheel for finish grinding, and the output panel of the third Z-axis mechanical structure 700 is connected to the static pressure spindle grinding wheel shaft structure, the output panel thereof corresponds to a large grinding wheel for rough grinding.

During the entire movement, the hydrostatic spindle workpiece axis structure moves linearly along the X-axis on the output panel of the X-axis mechanical structure 300. The C-axis index head moves linearly in the Z-axis direction on the output panel of the first Z-axis mechanical structure 500. The dynamic and static pressure spindle grinding wheel spindle structural member makes a linear motion in the Z-axis direction on the output panel of the third Z-axis mechanical structural member 700.

As a specific embodiment, as shown in fig. 4/5, the X-axis mechanical structure 300 is used to adjust the position of the hybrid spindle workpiece axis structure, and the X-axis mechanical structure 300 is driven by a conventional screw mechanism, and specifically includes a plurality of components including a screw, a bearing seat, a nut, a slider, and an output panel. Two ends of the screw rod are arranged in bearings of the bearing block, the screw rod is fixed through two ends of the bearing block, the tail end of the screw rod is fixed by the bearing block, and two bearings are arranged in the bearing block. Two sides of the screw rod are respectively provided with a linear guide rail, the sliding block is arranged on the linear guide rails, and the output panel is arranged on the sliding block. The nut is sleeved on the screw rod and fixed with the output panel by the nut sleeve. The output panel moves on the guide rail when the screw rod rotates. The input end of the screw rod is connected with the output end of the motor through a coupler.

The X-axis carriage and the lathe bed platform are integrally cast, the precision grade selected by the X-axis linear guide rail is equal to or higher than P grade, the precision grade of the ball screw is equal to or higher than C5 grade, X-axis bearing seats are arranged at two ends of the ball screw, a bearing supported in the X-axis bearing seat is a 7-series thrust matching bearing, the precision requirement grade is equal to or higher than C5 grade, and the mounting precision of the lathe bed platform, the guide rail surface and the mounting surface of the X-axis bearing seat reaches 0.003 mm; the X-axis bearing seat is installed in a manner that the bearing seat is separated from the carriage and locked by screws, the X-axis lead screw is connected with the driving motor by adopting a diaphragm type zero-clearance coupling, and the motor adopts an absolute value high-precision motor. In this structure, can realize the accurate control of X axial through controlling this motor.

As a specific embodiment, as shown in fig. 6, a hybrid spindle workpiece shaft structural member is disposed on an upper portion of the X-axis mechanical structural member 300, and includes: the device comprises an outer shell, a fixed plate, a motor and a rotating main shaft; the bottom of the outer housing is fixed to the output panel of the X-axis mechanical structure 300 and moves with the output panel in the X-axis. The fixed plate is vertical to the output panel and is positioned on the left side of the dynamic and static pressure main shaft workpiece shaft structural part; the motor and the rotating main shaft are distributed up and down on the fixed plate and are positioned on the right side of the fixed plate; the motor is provided with a motor cover; the output end of the motor is connected with a small belt pulley. The input end of the rotating main shaft is provided with a large belt pulley; the small belt pulley and the large belt pulley are positioned on the left side of the fixing plate and connected through the synchronous belt. The output end of the dynamic and static pressure main shaft workpiece shaft structural part is positioned on the right side, and the dynamic and static pressure main shaft workpiece shaft structural part is arranged along the Z axis; the X-axis mechanical structural part 300 drives the dynamic and static pressure main shaft workpiece shaft structural part to move along the X-axis direction; and the output end of the dynamic and static pressure main shaft workpiece shaft structural part is used for installing a workpiece to be machined. The output end of the dynamic and static pressure main shaft workpiece shaft structural member can be connected with the flange through a magnetic disc or can be connected through other modes. The workpiece to be machined can be arranged on the flange in a mode of connecting the magnetic disk with the flange, and then circular die machining is carried out.

As a preferred scheme, the dynamic and static pressure main shaft workpiece shaft adopted in the application can adopt a following high-precision dynamic and static oil pressure permanent magnet servo electric main shaft, the electric main shaft realizes that the dynamic and static oil pressure mechanical main shaft, a main shaft rotor and stator, a servo numerical control closed-loop encoder and a main shaft high-precision mounting shell are combined into a whole structure, many middle complex links are simplified and integrated, the transmission precision is improved, the overall stability of the main shaft is improved, the energy consumption in the power transmission process is reduced, the application precision of the whole machine tool is improved, the overall weight is reduced, and the volume of the whole shaft is reduced.

The high-precision dynamic and static oil pressure permanent magnet servo programmable positioning multifunctional electric spindle in the structure comprises a spindle mandrel 4100 which is hollow, a spindle mandrel 4100 and a servo motor mandrel which are coaxial and integrated, and a switching mechanism is not arranged in the middle. In the spindle, a thrust tin bronze sleeve 4101, a radial thrust tin bronze sleeve 4104 and a radial inner support tin bronze sleeve 4105 are all provided with a plurality of oil sealing rings, and the sealing rings are made of wear-resistant and high-temperature-resistant materials. The box body shaft front cover 4102 is provided with a sealing ring, the box body shaft front cover 4102 is additionally provided with a high-pressure seal, and the box body shaft front cover 4102 is used for sealing a thrust tin bronze sleeve 4101 bearing. The thrust tin bronze sleeve 4101 bearing is positioned at the front end of the thrust flange 4103 of the spindle mandrel, and the radial thrust tin bronze sleeve 4104 bearing is positioned at the rear end of the thrust flange 4103 of the spindle mandrel; a flange surface is arranged on the radial outer side of the thrust tin bronze sleeve 4101; a radial inner supporting tin bronze sleeve 4105 bearing is positioned on the outer surface of the input end side of the main shaft mandrel 4100 body; the radial thrust tin bronze sleeve 4104 bearing and the radial tin bronze sleeve bearing are both located inside the housing of the spindle housing 4109. Use three copper sheathing to support as sliding bearing, wherein set for 2 copper sheathes and be equipped with the thrust effect, radial and axial all has the support promptly, and 2 thrust copper sheathes all establish in exerting oneself the output position moreover, and this kind of innovation is dismouting easy maintenance, can make the precision higher. The copper sleeve is made of high-density cast or forged tin bronze alloy copper, so that the wear resistance is improved, the thermal deformation is controlled, and the micro-gap, micro-deformation and axis matching are achieved. The biggest difference between the dynamic and static oil pressure main shaft and the rolling bearing transmission main shaft is as follows: the rolling bearing is in contact type, and because the bearing consists of a bearing inner ring, a bearing outer ring and a ball or a roller in the middle, the bearing can generate friction and vibration in the rolling process, and the main shaft jumping and the output roundness can be influenced most by the rotation vibration.

Specifically, an oil inlet hole 4216 is arranged on a main shaft shell, the hole is connected with a hydraulic oil inlet hole 4301 on a box body, a flowing cavity of hydraulic oil is arranged in the main shaft shell, the outlet of the cavity is positioned on a radial thrust tin bronze sleeve 4104 and a radial inner supporting tin bronze sleeve 4105, the hydraulic oil enters the position of the bearing sleeve through the cavity, the radial thrust tin bronze sleeve 4104 and the radial inner supporting tin bronze sleeve 4105 are respectively provided with a through hole, so that the hydraulic oil can flow between the bearing sleeve and the main shaft shell to the position between the bearing sleeve and a main shaft mandrel, the inner sides of the radial thrust tin bronze sleeve 4104 and the radial inner supporting tin bronze sleeve 4105 are respectively provided with a very thin cavity for flowing in the hydraulic oil, after the hydraulic oil enters the position of the bearing sleeve, the bearing sleeve and the main shaft are floated under the action of high-pressure oil, and after the mutual floating between the bearing sleeve and the main shaft is ensured, the main shaft rotates at high speed under the, after the main shaft is started, the dynamic pressure bearing capacity and the static pressure bearing capacity formed by the shallow cavity step effect are superposed, the bearing capacity of the main shaft is greatly improved, the phenomenon that the main shaft and the bearing are abraded due to dry friction when the liquid dynamic pressure bearing is started and stopped is overcome, the service life and the precision retentivity of the main shaft and the bearing are improved, the homogenization function and the good vibration resistance of a high-pressure oil film are realized, and the main shaft is ensured to have high rotation precision and running stability. The spindle shell can be further provided with an oil outlet hole 4217, so that hydraulic oil can flow back into the box body, and the hydraulic oil can also directly flow back into the spindle oil pressure station mechanism through an oil outlet pipe joint connected with the oil outlet hole 4217 of the spindle shell.

In the structure, a copper bush bearing and an axis of a dynamic and static oil pressure main shaft are in close micro-clearance fit, high-pressure main shaft oil is pumped into a closed shaft cavity, so that the axis and a copper bush are floated under the action of pressure, an output mandrel of the main shaft and the copper bush are not in contact with each other under the action of high-pressure oil in the actual use process, a sealing element is contacted with the copper bush bearing and the mandrel, a mechanical sealing element is composed of a plurality of O-shaped rings or oil seals, a large amount of heat can be generated in the high-speed rotation process of the main shaft after reprocessing, the axis of the main shaft and the copper bush can be heated by the heat energy, the heat expansion ratio of copper and bearing steel is different, the heat conduction and the temperature rise of copper are faster than that of steel, the temperature rise of the main shaft can be locked by the temperature rise of the copper bush along with the increase of the rotating speed of the main shaft, and finally the copper bush and the. In order to solve the problem of temperature rise of load and rotating speed, the traditional published patent method is to increase the amount of pumped oil and enlarge the flow rate of a pump opening, and the method can solve some problems of temperature rise, but can increase the capacity and the power consumption of a hydraulic station. How to make the oil temperature constant is the key that the dynamic and static oil pressure main shaft can be stably used with high precision, so a more reasonable oil refrigeration device is added in various published patents to achieve the purpose of online control of the oil temperature, one to two temperature sensors are additionally arranged at copper sleeves of the dynamic and static oil pressure main shaft, the temperature is transmitted to a numerical control system through the temperature sensors under different working conditions of the main shaft, the numerical control system sends signals to a numerical control oil refrigerator after receiving different temperatures, and the numerical control oil refrigerator automatically adjusts the refrigeration temperature and flow rate after receiving the signals, so that the main shaft can basically work under a constant temperature state to achieve the aim of stable use with high precision. The innovation is characterized in that a fully smart and self-care brain is added to the hydraulic fluid of the main shaft, so that the body temperature can be automatically adjusted.

Main shaft installation box 4300 in this structure is polyhedron cavity structure, and wherein incasement portion is the cavity, mainly for subtract heavy and switching storage backward flow hydraulic oil, stores when the inside high-pressure oil of main shaft flows back zero, plays and cools off in the cavity, conveniently inserts by switching oil filler pipe joint 4202 again, sends back to the oil pressure station and carries out constant temperature cooling, and the high-pressure pump of recycling goes into in the main shaft. Main shaft installation box 4300 mainly supports the fixed of main shaft by box both ends precision finishing, for further obtaining case high rigidity, the light volume, lies in box installation bottom surface and adopts the small square cavity to keep away the sky and set up the strengthening rib, is equipped with direction sliding tray 4303 in the middle of the base, makes things convenient for whole box to move the position on mounting platform. The front end and the rear end of the main shaft mounting box body 4300 are provided with a plurality of weight avoiding holes below the bottom and the main shaft shell 4109, reinforcing ribs are arranged between the holes and the hole walls, oil return hole threaded holes are arranged on two sides of the bottom of the box body, an oil inlet threaded hole is arranged on the upper part of the box body, a sealing cover plate is arranged on the top of the box body, and the sealing cover plate is locked in the box body by a bolt. The main shaft mounting box 4300 is cast and molded by high-quality cast iron and then is finished by 6 surfaces.

In this application, servo motor includes: a main shaft permanent magnet servo motor rotor 4204, a main shaft permanent magnet servo motor stator 4205, a permanent magnet servo motor cooling water jacket 4203, a hollow servo permanent magnet motor absolute value encoder 4206, a rear oil hydraulic cylinder connecting flange 4207 and a rear oil hydraulic rotary cylinder or a pneumatic cylinder. Wherein, the rotor 4204 of the permanent magnet servo motor of the main shaft, the stator 4205 of the permanent magnet servo motor, the cooling water jacket 4203 of the permanent magnet servo motor and the shell 4210 of the servo motor are sequentially positioned on the outer wall of the input part of the main shaft mandrel 4100 from inside to outside; the main shaft permanent magnet servo motor rotor 4204 is connected with the main shaft mandrel 4100 through an inner bushing, and is installed and fixed in a manner of expanding a bushing and pressing a cover fastening bolt 4106.

The shell 4210 of the permanent magnet servo motor is cylindrical, the mounting end is flange-shaped, the other end is a power line outlet end, a sealing end cover 4208 is arranged, and a hollow servo permanent magnet motor absolute value encoder 4206 is fixedly arranged on the outer side of the sealing end cover 4208; a central control encoder sealing end cap 4209 is mounted on the sealing end cap 4208; the hollow servo permanent magnet motor absolute value encoder 4206 is positioned in the central control encoder sealing end cap 4209 and is connected with the outside through a permanent magnet servo motor outgoing line sealing joint 4211; the input part of the main shaft mandrel 4100 extends out of a rear end sealing end cover 4208 of a shell 4210 of the permanent magnet servo motor, the end part is connected with a hydraulic oil cylinder mounting flange through a bolt 4501, and the hydraulic oil cylinder mounting flange is connected with a rear oil hydraulic cylinder connecting flange 4207 through a bolt 4501.

The rotor 4204 of the main shaft permanent magnet servo motor and the stator 4205 of the main shaft permanent magnet servo motor are used in a matched combination mode, the insulation grade of the stator is F grade, and a temperature sensor and a 130 ℃ normally closed thermal protector are arranged in the stator. The inner circle and the outer circle of the rotor are finely ground to achieve good dynamic balance, the inner bushing is connected with a spindle 4100 of the main shaft, and the inner bushing and the outer bushing are installed and fixed in a manner of expanding the bushing and pressing a cover to fasten a bolt 4106. The rotor 4204 of the main shaft permanent magnet servo motor and the stator 4205 of the main shaft permanent magnet servo motor adopt high-voltage input with the voltage grade of 400V and adopt a 6-pole or 4-pole high-torque winding stator, a stator shell is provided with a cooling water jacket for cooling the temperature generated by operation, and the stator can stably operate at constant temperature through external liquid cooling.

The permanent magnet servo motor main shell 4210 is connected with the main shaft mounting box 4300, the permanent magnet servo motor main shell 4210 is sleeved on the outer circle of the stator water jacket, the stator is fixed in the main shaft shell 4210 through precise matching, one end of the main shell 4210 is provided with a cooling liquid inlet joint, the other end of the main shell 4210 is provided with a liquid return outlet, and heat generated when the main shaft rotates is taken away through circulation of circulating liquid. The main shell 4210 of the permanent magnet servo motor is cylindrical, the mounting end is flange-shaped, the other end is a power line outlet end, a sealing end cover 4208 is arranged, and a hollow servo permanent magnet motor absolute value encoder 4206 is fixedly mounted on the outer side of the sealing end cover 4208.

The hollow servo permanent magnet motor absolute value encoder 4206 is composed of an outer magnetic ring, an inner magnetic ring and an encoder reading head, the inner magnetic ring is fixed on the rotatable spindle shaft 4100, the outer magnetic ring and the encoder reading head are fixed on the outer side of the sealing end cover 4208, the inner magnetic ring is driven to rotate along with the rotation of the spindle shaft 4100, data information can be accurately fed back to a numerical control system through the reading head on the outer magnetic ring, and the purpose of online real-time measurement and control is achieved. The outgoing line of the hollow servo permanent magnet motor absolute value encoder 4206 is fixed at the rear end of the motor main shell 4210 through a sealed outgoing line box and a sealed coding line joint. The rotor and the stator of the servo motor are assembled in a rear-mounted mode, the axis of the motor and the axis of the dynamic and static pressure main shaft are integrated and coaxial, the integral axis precision is improved, hollow transition connecting rings are omitted, and a coaxial and concentric high-precision manufacturing result is achieved.

In this application, a rear hydraulic cylinder coupling flange 4207 is fixed to the rear end of the main shaft 4100 by fastening bolts 4106, and a rear hydraulic rotary cylinder or pneumatic cylinder is fixed to the coupling flange by fastening bolts 4106. The rear oil pressure rotary cylinder or pneumatic cylinder oil supply and air supply system is supplied with oil by an external oil pressure station, high-pressure oil is pumped in by a high-pressure pipeline, and the tensioning and loosening of the oil pressure cylinder are controlled by a numerical control system through an electromagnetic valve. When the pneumatic cylinder is used, high-pressure air can be input through the air pump, the tensioning and loosening of the pneumatic cylinder are controlled by the numerical control system through the electromagnetic valve, and the oil hydraulic cylinder and the pneumatic cylinder can be selectively used according to different working conditions.

The output adapter flange 4107 at the front end of the main shaft is mainly used for quickly replacing different workpieces, a rear-mounted oil pressure rotary cylinder or a pneumatic cylinder is used, a pull rod in a central hole of the main shaft mandrel 4100 is connected with a hydraulic chuck 4113 or an elastic collet chuck additionally arranged at the output end of the main shaft, and the pull rod can be tensioned and loosened under the control of a numerical control system, so that the automatic loading and unloading of a manipulator are realized, and the automatic continuous production is realized. After the output adapter flange 4107 disc at the front end of the main shaft is replaced, a permanent magnetic chuck 4111 can be additionally arranged, so that various special-shaped machined workpieces can be adsorbed. An inner hole of the spindle 4100 is provided with an inner taper hole with BT or Mohs structure, a tip 4112 can be additionally arranged, and the outer peripheral surface of a workpiece can be rotationally processed by pressing the workpiece through two tips in cooperation with a tailstock tip 4112 of a machine tool.

The output shaft core structure of the main shaft determines multiple purposes of the main shaft, and the invention designs and innovates a plurality of schemes, so that the static oil pressure main shaft has more comprehensive effects in practical application. The spindle for the workpiece to be machined is hollow and may be connected to pull rod in penetrating mode, and the output end of the spindle is of Morse or BT series structure.

As a specific embodiment, a grinding wheel dressing mechanism is distributed on an output panel of the X-axis mechanical structural component, and grinding wheel dressing diamond pen holder seats are respectively arranged on two sides of the output panel of the X-axis mechanical structural component with a dynamic and static pressure main shaft as a center. The grinding wheel correction diamond pen support seats are located on two sides of a box body of a dynamic and static pressure main shaft workpiece shaft structural part, and two grinding wheel pens in different directions are arranged at the front end of each grinding wheel correction pen support seat. The grinding wheel correction pen support is located on the rear portion, the rear side grinding wheel pen is used for finishing the grinding wheel end face and the side face of a dynamic and static pressure main shaft outer circle grinding wheel, the front side grinding wheel pen is used for finishing the grinding wheel outer circle and the end face of a high-speed electric main shaft and an ultrahigh-speed electric main shaft, the grinding wheel correction pen support is located on the front side, one grinding wheel pen is used for finishing the end face of an inner circle grinding wheel, and the grinding wheel pen in the other direction is used for finishing the outer circle of the inner circle grinding wheel.

As a specific example, as shown in fig. 7 and 8, the first Z-axis mechanical structure 500 includes:

a first Z-axis carriage: integrally cast with the grinder base 100; the guide rail groove of the first Z-axis carriage is embedded, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove adopts a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure;

first Z axial lead screw actuating mechanism: the transmission precision structure comprises a Z-axis screw rod, a bearing seat, a bearing and a screw rod nut sleeve; the Z-axis screw rod adopts a high-precision screw rod with the grade of more than C5, the bearing seats are combined by a front bearing seat and a rear bearing seat, each bearing seat is internally provided with 2 high-precision thrust bearings with the grade of more than 7 series P5 which are combined in a matched mode, the screw rod nut sleeve adopts a split nut sleeve, and the flange surface of the nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position on the carriage base through the bearing block, and the mounting position of the bearing block is lower than the guide rail surface; two sides of the screw rod are respectively provided with a linear guide rail, the slide block is arranged on the linear guide rails, and the output panel is arranged on the slide block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the nut and the output panel are driven to move on the guide rail when the feed screw rotates;

along the Z-axis direction, two sides of the output panel are connected with the shaft sealing plate and the cover body of the servo motor through the organ cover; side sealing plates are connected with the two sides of the output panel; the Z-axis carriage assembly is formed into a sealing protection cover by the side sealing plates and the output panel organ cover; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupling; the servo motor is positioned on the right side of the first Z-axis lead screw driving mechanism.

As a specific embodiment, the C-axis index head shell is positioned on the output panel of the first Z-axis carriage, and the C-axis servo motor is positioned on the right side of the C-axis index head shell and is connected with the input end of the C-axis harmonic generator through a steering gear; the motor cover is located servo motor's outside, and servo motor installs on the motor board.

The method comprises the following steps: case 610, input shaft 620, output shaft 630, and inner bearing 631. Input shaft 620 and output shaft 630 are mounted to case 610. The input shaft 620 is supported by two bearings, and the input shaft 620 drives the output shaft 630 to rotate about the central axis 6101. The through hole 632 formed on the output shaft 630 can be penetrated by a power supply wire and/or a water pipe, so that the installation of the power supply wire and/or the water pipe of the numerical control transmission indexing mechanism 6100 is more convenient. The inner bearing 631 is disposed in the through hole 632. The inner bearing 631 protects the wires and/or water pipes passing through the through hole 632 to prevent the wires and/or water pipes from rubbing against the hole wall of the through hole 632 to cause abrasion. As a specific embodiment, the through hole 632 passes through the output shaft 630 along the central axis 6101. The outer ring of the inner bearing 631 contacts the inner wall of the through hole 632. The box body 610 is formed with an outlet hole 611 for passing out an electric wire and/or a water pipe passing through the through hole 632. The hole depth direction of the wire outlet hole 611 is perpendicular to the hole depth direction of the through hole 632. The hole depth direction of the outlet hole 611 is parallel to the rotational axis of the input shaft 620.

The cnc tool grinder indexing shaft 6100 also includes a servo motor 640 and a zero-clearance coupling 641. The zero-clearance coupling 641 connects the motor shaft of the servo motor 640 with the input shaft 620. The cnc tool grinder indexing shaft 6100 also includes a motor base 650. The motor mount 650 is fixed to the case 610. The servo motor 640 is mounted to a motor mount 650. The motor cover 6180 covers the servo motor 640 to play a protection role.

The input shaft 620 is a double enveloping cambered surface worm. The periphery of the output shaft 630 is provided with a plurality of needle bearings 633 which are matched with the double-enveloping cambered surface worm. The plurality of needle bearings 633 are evenly distributed in the circumferential direction of the central axis 6101. The servo motor 640 provides a driving force, the driving force of the servo motor 640 is transmitted to the double-enveloping cambered screw rod through the zero-clearance coupler 641, and the double-enveloping cambered screw rod is matched with the needle bearing 633 to drive the output shaft 630 to rotate, so that the output torque is multiplied.

During transmission, a plurality of uniformly distributed needle roller bearings 633 are simultaneously matched with the double-enveloping cambered-surface screw for transmission. The friction coefficient generated by the transmission mode is small, the fit clearance is small, and the transmission precision is high.

The cnc tool grinder indexing shaft 6100 also includes an outer bearing 634. Specifically, the outer bearing 634 is fitted around the outer periphery of the output shaft 630 and fixed by bolts. The outer bearing 634 is a cross roller bearing or a radial-axial slewing bearing. The cnc tool grinder indexing shaft 6100 also includes a bearing gland 660 that fixes the position of the outer bearing 634. The digitally controlled drive indexing mechanism 6100 also includes an output disk 670. Output disc 670 and bearing gland 660 form waterproof labyrinth structure, can effectual waterproof dustproof, avoid box 610 to intake or advance the dust, as the protective layer of oil blanket, make dual safeguard function. As a specific embodiment, the bearing gland 660 is fixed to the case 610. The output disc 670 is fixed to the output shaft 630.

The numerical control transmission dividing mechanism 6100 further comprises a framework oil seal structure 680, which plays a role in protecting and sealing the box body 610, and avoids leakage of internal lubricating oil. While also preventing external dust from entering the case 610. Specifically, the skeleton oil seal structure 680 is provided on the outer periphery of the output shaft 630. The box body 610 is formed by high-strength cast iron, has small appearance structure volume and light weight, and is beneficial to high-speed movement of a numerical control machine. The outer wall of the box 610 includes an outer arcuate surface 612. The case 610 is formed with a weight-reducing groove 6102. The extrados 612 and the lightening recess 6102 are located on both sides of the case 610. Specifically, the extrados 612 and the lightening recess 6102 are located on opposite sides of the case 610. The extrados 612 and the weight-reduction grooves 6102 improve the strength of the case 610 and reduce the mass of the case 610. When the C-axis indexing rotary table moves, the servo motor is controlled to drive the C-axis indexing rotary table to rotate on the horizontal plane, the angle of the second Z-axis electric spindle translation mechanical structural part is adjusted, and the moving of the dynamic and static pressure spindle workpiece shaft structural part in the X axial direction and the matching of the rotating angle of the C-axis indexing rotary table can be realized due to the fact that a small grinding wheel is adopted for fine grinding and internal grinding in the grinding of the internal grinding wheel.

As a specific example, the second Z-axis electric spindle translation mechanical structure comprises:

planker: the guide rail groove of the carriage is embedded, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove adopts a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure; the carriage is fixed on the fixed seat;

the screw rod driving mechanism comprises: the transmission precision structure comprises a screw rod, a bearing seat, a bearing and a screw rod nut sleeve; the lead screw adopts a high-precision lead screw with a grade of more than C5, the bearing seats are combined and used by being divided into a front bearing seat and a rear bearing seat, each bearing seat is internally provided with 2 high-precision thrust bearings with a grade of more than 7 series P5 which are combined in a matched mode, the lead screw nut sleeve adopts a split nut sleeve, and the flange surface of the nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position on the carriage base through the bearing block, and the mounting position of the bearing block is lower than the guide rail surface; two sides of the screw rod are respectively provided with a linear guide rail, the slide block is arranged on the linear guide rails, and the output panel is arranged on the slide block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the nut and the output panel are driven to move on the guide rail when the feed screw rotates;

two sides of the output panel are connected with the shaft seal plate and the cover body of the servo motor through the organ cover; side sealing plates are connected with the two sides of the output panel; the carriage assembly is formed into a sealing protection cover by the side sealing plate and the output panel organ cover; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupling; the servo motor is positioned on the right side of the screw rod driving mechanism;

the output panel is provided with a permanent magnet synchronous electric spindle; the output end of the electric main shaft faces the dynamic and static pressure main shaft workpiece shaft structural part; an inner circle grinding wheel is arranged at the output end of the electric spindle.

During specific action, the movable direction of the second Z-axis electric spindle translation mechanical structural part on the horizontal plane is controlled through the action of the C-axis indexing rotary table, and the feeding distance of the electric spindle is adjusted through the action of the lead screw by the second Z-axis electric spindle translation mechanical structural part, so that the grinding depth and angle of the inner circle are enlarged, and the grinding range of the inner circle of the device is widened.

As a specific example, the first Z-axis mechanical structure 500 and the third Z-axis mechanical structure 700 are as close together as possible on the grinding machine, and since these two structures do not work simultaneously, there is no interference during the machining process, as long as they are not completely close together. As shown in fig. 9, the third Z-axis mechanical structure 700 includes:

a third Z-axis carriage: integrally cast with the grinder base 100; the guide rail groove of the third Z-axis carriage is embedded, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove adopts a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure;

the third Z-axis screw rod driving mechanism: the transmission precision structure comprises a Z-axis screw rod, a bearing seat, a bearing and a screw rod nut sleeve; the Z-axis screw rod adopts a high-precision screw rod with the grade of more than C5, the bearing seats are combined by a front bearing seat and a rear bearing seat, each bearing seat is internally provided with 2 high-precision thrust bearings with the grade of more than 7 series P5 which are combined in a matched mode, the screw rod nut sleeve adopts a split nut sleeve, and the flange surface of the nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position on the carriage base through the bearing block, and the mounting position of the bearing block is lower than the guide rail surface; two sides of the screw rod are respectively provided with a linear guide rail, the slide block is arranged on the linear guide rails, and the output panel is arranged on the slide block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the nut and the output panel are driven to move on the guide rail when the feed screw rotates;

along the Z-axis direction, two sides of the output panel are connected with the shaft sealing plate and the cover body of the servo motor through the organ cover; side sealing plates are connected with the two sides of the output panel; the Z-axis carriage assembly is formed into a sealing protection cover by the side sealing plates and the output panel organ cover; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupling; the servo motor is positioned on the right side of the third Z-axis lead screw driving mechanism;

a drag chain plate is arranged on the back surface of the third Z-axis drag plate; the upper part of the drag chain plate is fixedly connected with a connecting plate; the connecting plate is fixed with the side surface of the output panel; the bottom of the drag chain plate is provided with a lower fixing plate; the lower fixing plate is fixed on the side surface of the Z-axis carriage.

As a specific example, as shown in fig. 33 to 38, the mechanical structure of the present application also relates to a U-axis as a mounting mechanism of an on-line three-dimensional measuring mechanism including a trigger-type three-dimensional measuring head and a measuring head driving mechanism.

The bottom of the measuring head driving mechanism is fixed on an output panel of a third Z-axis mechanical structural part, the output end of the measuring head driving mechanism is connected with the bottom of the trigger type three-dimensional measuring head, and the trigger type three-dimensional measuring head is controlled to move in the Z axial direction or rotate along a vertical plane on the output panel of the third Z-axis mechanical structural part, so that the trigger type three-dimensional measuring head can perform online measurement on a workpiece on a dynamic and static pressure main shaft workpiece axial structural part.

The measuring head driving mechanism in the embodiment comprises two schemes, including a U-axis translation mechanical structural part or a B-axis indexing table.

When the measuring head driving mechanism adopts a U-axis translation mechanical structural part, the U-axis mechanical structural part comprises a U-axis carriage, a U-axis module, a U-axis servo motor and a U-axis organ cover; the bottom of the U-axis carriage is arranged on an output panel of the first Z-axis mechanical structural part, and the U-axis module is arranged on the U-axis carriage; a nut sleeve is fixedly arranged on a U-axis output panel of the U-axis module, a U-axis screw rod is fixedly arranged in the U-axis module, two ends of the U-axis screw rod are arranged in the U-axis module through a U-axis bearing seat, and the U-axis module is transversely arranged on a U-axis carriage through the matching of the U-axis screw rod and the nut sleeve; the U-axis module is externally covered with U-axis organ covers at two ends of the U-axis output panel, the U-axis organ covers are in a square-tube integral sealing seamless design and are connected with a side plate metallographic phase of the U-axis output panel to form a closed movable cavity; the U-axis servo motor is positioned on the right side of the U-axis mechanical structural part, and the output end of the U-axis servo motor is connected with the input end of a U-axis screw rod through a zero-clearance coupling.

The structure of whole U axle translation mechanical structure is similar basically with third Z axle mechanical structure, and the afterbody of triggering formula three-dimensional measuring head is provided with the extension rod to fix on right angle type measuring head support through the bolt, the output panel of U axle module is fixed to the bottom of right angle type measuring head support, thereby forms the structure of triggering formula three-dimensional measuring head.

U axle translation mechanical structure fixes on the output panel of third Z axle mechanical structure, does concertina movement on the same moving direction of output panel with first Z axle mechanical structure, and its effect is the ductility that increases the Z axle panel, and will trigger formula three-dimensional measuring head and fix on the output panel of third Z axle mechanical structure, trigger formula three-dimensional measuring head and can not produce mutual interference with the emery wheel main shaft on the Z axle panel when measuring.

When the three-dimensional measuring head of formula that triggers is measured in needs, only need drive U axle servo motor alone and carry out the removal on the Z axle, will trigger the measuring head of the three-dimensional measuring head of formula and move to established position.

In another scheme, when the measuring head driving mechanism adopts a B-axis indexing table, the measuring head driving mechanism comprises a harmonic speed reducer bracket, a harmonic speed reducer, a servo motor and a motor cover; the harmonic speed reducer support is fixed on an output panel of the first Z-axis mechanical structural part; the harmonic speed reducer is vertically fixed on the harmonic speed reducer support, and the output direction of the harmonic speed reducer is a Z-axis vertical plane and faces backwards; the output end of the servo motor is connected with the input end of the harmonic reducer; the output end of the harmonic speed reducer is fixedly connected with the bottom side surface of the trigger type three-dimensional measuring head through a bolt.

The tail of the trigger type three-dimensional measuring head is provided with an extension rod and is fixed on a right-angle measuring head support through a bolt, so that a structure of the trigger type three-dimensional measuring head is formed.

When not measuring, whole trigger formula three-dimensional measuring head is rotated 90 degrees to the rear for the measuring head is up, when needs measure, only needs control servo motor, can drive the work of harmonic speed reducer machine, and then drives the rotation of measuring head to the default position, realizes detecting. This scheme can realize the motion position of three-dimensional measuring head through the high accuracy rotational positioning of harmonic speed reducer machine, reaches effectively to dodge with the emery wheel at the mutual interference of during operation.

As a specific example, as shown in fig. 10, the hybrid spindle grinding spindle structure is mounted on the output panel of the third Z-axis mechanical structure 700, and the bottom of the fixing plate is fixed on the output panel of the third Z-axis carriage and moves on the Z-axis along with the output panel; the motor and the rotating main shaft are distributed up and down on the fixing plate, and a middle fixing plate is arranged between the motor and the rotating main shaft; the rotating main shaft is parallel to the Z axis, and the output end faces the left side; the motor is provided with a motor cover; the output end of the motor is arranged on the right side and is connected with a small belt pulley; the input end of the rotating main shaft is positioned on the right side and is provided with a large belt pulley; the small belt pulley and the large belt pulley are connected through a synchronous belt; the output end of the rotating main shaft is connected with a large grinding wheel. Because this device can realize correct grinding, corase grind, mill interior circle and cylindrical grinding simultaneously, in the structure of this application, what the output of hybrid main shaft grinding wheel axle structure installed is big emery wheel, mainly used corase grind and cylindrical grinding. The output end of the electric main shaft is provided with a small grinding wheel which is mainly used for fine grinding of the excircle.

As a specific example, the structure of the grinding spindle structural member of the dynamic and static pressure spindle can adopt a permanent magnet servo electric spindle with dynamic and static oil pressure in a high-speed spindle, and the types of the high-precision spindle unit include a rolling bearing type mechanical spindle, a dynamic and static pressure mechanical spindle, a rolling bearing type electric spindle, a dynamic and static pressure electric spindle and the like. The tungsten steel sleeve bearing is applied in the application, the thermal expansion coefficient is effectively controlled, the wear resistance is improved, the hollow refrigeration backflow circulating device of the spindle is added, the thermostatic controller is added, the temperature rise deformation of the spindle is effectively controlled, the known rotating speed regulating range of the dynamic and static oil pressure permanent magnet servo electric spindle is widened, and the higher rotating speed is achieved under the conditions of no loss of high precision and high rigidity.

The electric main shafts are classified into an external electric main shaft and an internal electric main shaft according to the installation mode of the motor, the external electric main shaft is connected with the mechanical main shaft through a coupler or a belt pulley, the electric main shaft has the characteristics of convenience in installation and maintenance and the like, but power and energy consumption can be consumed, the coaxiality precision is not very high in the installation process, and the noise can make a bit; the built-in electric main shaft has the biggest defects that oil seeps into the motor rotor and stator after a long time use and finally causes the damage of a motor, the later maintenance cost is high, and the axle center of the bearing of the shaft shell is easy to damage after repeated assembly and disassembly.

The input part of the main shaft mandrel in the high-speed mandrel internal-cooling dynamic and static oil pressure permanent magnet servo electric main shaft in the structure is hollow, the output part is solid, the hollow structure part of the main shaft mandrel is introduced into a cooling reflux circulating device, the input end of the input part of the main shaft mandrel is provided with a high-pressure oil inlet hole, the high-pressure oil inlet hole and a main shaft shell cavity share an oil outlet to form a sealed liquid flow circulating inner cavity, a switching rolling sealing bearing and a switching flange are arranged at the oil inlet, when the main shaft mandrel rotates at a high speed, the connected hydraulic pipe joint and the pipeline are not moved, and a plurality of small holes for refrigerating reflux are formed in the mandrel for ensuring stable and.

The innovation of the structure is that a cooling reflux circulating device can be introduced into the hollow of the spindle mandrel, a rotor and a stator of a servo motor are assembled in a rear-mounted mode, the axis of the motor and the axis of the dynamic and static pressure spindle are integrated to form the same axis, and the accuracy of the whole axis is improved. The scheme subtracts the connection rings with hollow transition, and achieves the coaxial concentric high-precision manufacturing result. In the spindle, a thrust tungsten steel sleeve bearing 8101, a radial thrust tungsten steel sleeve bearing 8104 and a radial inner support tungsten steel sleeve bearing 8105 are all provided with a plurality of oil seal rings, and the seal rings are made of wear-resistant and high-temperature-resistant materials. And a box body shaft front cover 8102 is provided with a sealing ring, a high-pressure seal is added into the box body shaft front cover 8102, and the box body shaft front cover 8102 is used for sealing the thrust tungsten steel sleeve bearing 8101 bearing. The thrust tungsten steel sleeve bearing 8101 is positioned at the front end of the spindle thrust flange 8103, and the radial thrust tungsten steel sleeve bearing 8104 is positioned at the rear end of the spindle thrust flange 8103; a flange surface is arranged on the radial outer side of the thrust tungsten steel sleeve bearing 8101; the radial inner supporting tungsten steel sleeve bearing 8105 is positioned on the outer surface of one side of the input end of the spindle mandrel 8100 body; the radial thrust tungsten steel sleeve bearing 104 and the radial tungsten steel sleeve bearing are both located inside the housing of the spindle housing 8109. The dynamic and static oil pressure main shaft uses three tungsten steel sleeves as sliding bearing supports, wherein 2 tungsten steel sleeves are set to have thrust action, namely, the radial and axial directions are all supported, and the 2 thrust tungsten steel sleeves are arranged at output end positions. The tungsten steel sleeve material is determined to be high-density cast or forged tin bronze alloy copper material, so that the wear resistance is improved, the thermal deformation is controlled, and the micro-gap, micro-deformation and axis matching are achieved.

Specifically, an oil inlet 8216 is arranged on a main shaft shell, the oil inlet is connected with a hydraulic oil inlet 8301 on a box body, a flowing cavity of hydraulic oil is arranged in the main shaft shell, an outlet of the cavity is positioned on a radial thrust tungsten steel sleeve 8104 and a radial inner support tungsten steel sleeve 8105, the hydraulic oil enters the position of a bearing sleeve through the cavity, the radial thrust tungsten steel sleeve 8104 and the radial inner support tungsten steel sleeve 8105 are respectively provided with a through hole, so that the hydraulic oil can flow between the bearing sleeve and the main shaft shell to the position between the bearing sleeve and a main shaft mandrel, the inner sides of the radial thrust tungsten steel sleeve 8104 and the radial inner support tungsten steel sleeve 8105 are respectively provided with a very thin cavity for flowing in the hydraulic oil, after the hydraulic oil enters the position of the bearing sleeve, the bearing sleeve and the main shaft mandrel float under the action of high-pressure oil, after the mutual floating between the bearing sleeve and the main shaft is ensured, the main shaft rotates at, after the main shaft is started, the dynamic pressure bearing capacity and the static pressure bearing capacity formed by the shallow cavity step effect are superposed, the bearing capacity of the main shaft is greatly improved, the phenomenon that the main shaft and the bearing are abraded due to dry friction when the liquid dynamic pressure bearing is started and stopped is overcome, the service life and the precision retentivity of the main shaft and the bearing are improved, the homogenization function and the good vibration resistance of a high-pressure oil film are realized, and the main shaft is ensured to have high rotation precision and running stability. An oil outlet 8217 can be further arranged on the main shaft shell, so that hydraulic oil can flow back into the box body, and the oil outlet 8217 of the main shaft shell can be directly connected with a pipe joint and flow back into the main shaft oil pressure station mechanism.

In the structure, a tungsten steel sleeve bearing of a dynamic and static oil pressure main shaft is in close micron-sized clearance fit with an axis, high-pressure main shaft oil is pumped into a closed shaft cavity to enable the axis and the tungsten steel sleeve to float under the action of pressure, an output mandrel of the main shaft and the tungsten steel sleeve are not in contact with each other under the action of high-pressure oil in the actual use process, a sealing element is in contact with the tungsten steel sleeve bearing and the mandrel, and a mechanical sealing element is composed of a plurality of O-shaped rings or oil seals. Different from the prior art, the copper sleeve adopted in the prior art generates a large amount of heat in the high-speed rotation process of the main shaft, the heat energy can heat the axis of the main shaft and the copper sleeve, the thermal expansion ratio of copper and bearing steel is different, the heat conduction temperature of copper is higher than that of steel, the workpiece load outside the main shaft is increased along with the increase of the rotating speed of the main shaft, the temperature rise of the copper sleeve can lock the main shaft core, and finally the copper sleeve and the axis are contacted with a wear mandrel to lose precision. In the present application, the main shaft mounting case and the servo motor are completely identical to the case and the servo motor on the workpiece shaft, and a repeated description thereof will not be provided.

In this application, the object of processing all is centrosymmetric circular or conical, consequently, does not need the relevant elevation structure of Z axle, all sets up the output center of hybrid main shaft work piece axle structure spare, hybrid main shaft emery wheel axle structure spare and electric main shaft on same level, only needs like this to control the position relation each other and can realize inside and outside circle and grind.

Finally, as shown in fig. 39-43, which are operation interface diagrams of the numerical control system adopted in the present application, the operator only needs to perform the guiding operation according to the interface to perform the rough grinding and the finish grinding of the internal workpiece.

In the application, a five-axis numerical control inner and outer circle composite grinding machine or a four-axis numerical control inner and outer circle composite grinding machine can be formed by subtracting the B axis and/or the second Z axis electric spindle translation mechanical structural part where the online three-dimensional measuring mechanism is located, and the axis where the online three-dimensional measuring mechanism is located and the axis where the second Z axis electric spindle translation mechanical structural part is located all move independently, so that the inner circle grinding and the outer circle grinding to be finished by the application can still be realized after one or two of the axes are removed.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the foregoing embodiments, and various equivalent changes (such as number, shape, position, etc.) may be made to the technical solution of the present invention within the technical spirit of the present invention, and the equivalents are protected by the present invention.

Claims

1. A six-axis numerical control inner and outer circle composite grinding machine is characterized by comprising a grinding machine base, six-axis mechanical structural components, a grinding wheel dressing mechanism, a sheet metal shell and a numerical control system, wherein the machine base is an iron casting or a natural granite or mineral casting; the six-axis mechanical structural part comprises an X-axis mechanical structural part, a first Z-axis mechanical structural part, a third Z-axis mechanical structural part, a second Z-axis electric spindle translation mechanical structural part, an indexing rotary table and an online three-dimensional measuring mechanism; the front side of the grinding machine base is an operation station, the direction of the operation station facing the machine tool base is taken as the front side, the direction parallel to the positive direction is marked as a Z axis, the direction vertical to the Z axis on the horizontal plane is an X axis, the positive direction of the X axis points to the operation station, and the positive direction of the Z axis points to the right side of the operation station;

the grinding machine base is arranged to be integrally formed by casting in a cubic manner or formed by cutting a whole natural granite block; the front side of the grinding machine base is used as an operation station, and the back side of the grinding machine base is provided with an oil running pipeline; a base plate is arranged on the grinding machine base; be provided with three installation region on the bed plate, be respectively: the left area is used for placing an X-axis mechanical structural part; the right side is close to the front area and is used for arranging a first Z-axis mechanical structural part, and the right side is close to the back area and is used for arranging a third Z-axis mechanical structural part;

a dynamic and static pressure main shaft workpiece shaft structural part is arranged at the upper part of the X-axis mechanical structural part; the output end direction of the dynamic and static pressure main shaft workpiece shaft structural part is positioned on the right side, and the dynamic and static pressure main shaft workpiece shaft structural part is arranged along the Z axis; the X-axis mechanical structural part drives the dynamic and static pressure main shaft workpiece shaft structural part to move along the X-axis direction; the direction of the dynamic and static pressure main shaft workpiece shaft structural part is parallel to the Z axis, and the output end is positioned on the right side; the output end of the dynamic and static pressure main shaft workpiece shaft structural part is used for mounting a machined part;

the indexing rotary table is arranged on the upper part of an output panel of the first Z-axis mechanical structural part; the first Z-axis mechanical structural part drives the indexing rotary table to move along the Z-axis direction;

the output end of the indexing rotary table is provided with a second Z-axis electric spindle translation mechanical structural part; the indexing rotary table controls the second Z-axis electric spindle translation mechanical structural part to rotate along a plane formed by an X axis and a Z axis;

a permanent magnet synchronous high-speed electric spindle is arranged on an output panel of the second Z-axis electric spindle translation mechanical structural part, and the rotating speed is 5000-; the output end of the permanent magnet synchronous high-speed electric main shaft faces a dynamic and static pressure main shaft workpiece shaft structural part; an inner hole grinding wheel is arranged at the output end of the permanent magnet synchronous high-speed electric main shaft; the second Z-axis electric spindle translation mechanical structural part is used for controlling the electric spindle to move in the moving direction of the output panel of the electric spindle; the side surface of the permanent magnet synchronous high-speed electric spindle and the side surface of the permanent magnet synchronous high-speed electric spindle are arranged at the same central height in parallel, the ultra-high-speed small electric spindle is arranged at the rotating speed of 5-15 ten thousand revolutions per minute, and small and micro inner holes are mainly ground;

the upper part of an output panel of the third Z-axis mechanical structural part is provided with a dynamic and static pressure grinding wheel spindle structural part and an online three-dimensional measuring mechanism; the third Z-axis mechanical structural part drives the dynamic and static pressure grinding wheel spindle structural part and the online three-dimensional measuring mechanism to move along the Z-axis direction; the online three-dimensional measuring mechanism is positioned on the front side of the dynamic and static pressure grinding wheel spindle structural part;

the online three-dimensional measuring mechanism comprises a trigger three-dimensional measuring head and a measuring head driving mechanism; the bottom of the measuring head driving mechanism is fixed on an output panel of a first Z-axis mechanical structural part, the output end of the measuring head driving mechanism is connected with the bottom of the trigger type three-dimensional measuring head, and the trigger type three-dimensional measuring head is controlled to move in the Z axial direction or rotate along a vertical plane on the output panel of the first Z-axis mechanical structural part, so that the trigger type three-dimensional measuring head can carry out online measurement on a workpiece on a dynamic and static pressure main shaft workpiece shaft structural part;

the output end of the dynamic and static pressure grinding wheel spindle structural part is positioned on the left side; the end of the dynamic and static pressure grinding wheel spindle is provided with a grinding wheel flange for grinding an outer circle, the grinding wheel flange is provided with an online dynamic balance adjusting device, and the end of the dynamic and static pressure grinding wheel spindle is provided with a rotary grinding wheel rod for assembling a grinding wheel for grinding a large inner hole; the grinding wheel for assembling and grinding the large inner hole is used for performing coarse grinding and fine grinding on the inner circle, the inner cone circle, the end surface of the inner hole, the outer cone surface and the small outer circle of a large and deep cavity of a processed workpiece; the outer circle grinding wheel is used for performing coarse grinding and fine grinding on the outer circle, the step surface of the outer circle and the end surface of the outer circle of the processed workpiece;

the grinding wheel dressing mechanism is distributed on an output panel of the X-axis mechanical structural part, and grinding wheel dressing diamond pen support seats are respectively arranged on two sides of the output panel of the X-axis mechanical structural part by taking a dynamic and static pressure main shaft as a center; the grinding wheel correction diamond pen bracket seats are positioned on two sides of the box body of the dynamic and static pressure main shaft workpiece shaft structural part; the front end of each grinding wheel correction pen support is provided with two grinding wheel pens in different directions; the grinding wheel correction pen comprises a grinding wheel correction pen support, a grinding wheel pen support and a grinding wheel correction pen, wherein the grinding wheel pen support is arranged on one side of the grinding wheel correction pen support, the grinding wheel pen is arranged on the rear side of the grinding wheel support and is used for finishing the grinding wheel end face and the side face of a grinding wheel of a dynamic and static pressure main shaft, the grinding wheel pen is arranged;

the output end of the dynamic and static pressure main shaft workpiece shaft structural part is provided with a diamond roller flange; the outer diameter surface of the flange plate can be provided with a diamond roller for trimming the outer circular surface of the grinding wheel;

the side surface of the electric spindle and the side surface of the electric spindle are arranged in parallel at the same central height, and the electric spindle is provided with a super-high-speed small electric spindle, has the rotating speed of 5-15 ten thousand revolutions per minute and is used for grinding small and micro inner holes; the indexing rotary table adopts a C-axis indexing rotary table or a direct-drive DDR indexing rotary table, and both the C-axis indexing rotary table and the direct-drive DDR indexing rotary table comprise built-in brakes;

the sheet metal shell includes:

the whole machine shell is arranged on the grinding machine base, and all structural parts are arranged in a cavity of the shell;

the left and right horizontal pull type double-door structure is positioned on the front surface of the whole machine shell;

the oil pipeline penetrates from the outside of the whole machine shell and extends into the whole machine shell;

the numerical control system operation box is used for controlling the operation of the whole equipment and is provided with software, is positioned on the front surface of the whole machine shell and is positioned on the right side or the left side of the left and right sliding door structures; the numerical control system is embedded in the operation control cabinet.

2. The six-axis numerically controlled internal and external circular compound grinding machine as claimed in claim 1, wherein said X-axis mechanical structural member comprises:

an X-axis carriage: the grinding machine is positioned on the left area of the machine body of the grinding machine; the X-axis carriage is an embedded guide rail groove, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove is a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure;

x axial lead screw actuating mechanism: the X-axis lead screw, the bearing seat, the bearing, the lead screw nut and the nut sleeve form a transmission precision structure;

the X-axis screw rod adopts a high-precision screw rod with the grade of more than C3 and a small lead screw rod with the lead of less than 10, the bearing seats are combined and used by two front and rear bearing seats, each bearing seat is internally provided with 2 high-precision thrust bearings with the grade of more than 7 series P5 which are combined in a matched mode, the screw rod nut sleeve adopts a split nut sleeve, and the flange surface of the screw rod nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position on the carriage base through the bearing block, and the mounting position of the bearing block is lower than the surface of the guide rail sliding block; two linear guide rails are respectively arranged on two sides of the screw rod, a sliding block is arranged on the linear guide rails, and the output panel is arranged on the sliding block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the feed screw rotates to drive the nut and the output panel to move on the guide rail;

along the X-axis direction, two sides of the output panel are connected with shaft seal plates and a cover body of a servo motor through an organ cover; side seal plates are connected to two sides of the output panel; the side sealing plates and the output panel organ cover form a sealing protection cover for the X-axis carriage assembly; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupler;

a drag chain plate is arranged on the side surface of the X-axis drag plate; the upper part of the drag chain plate is fixedly connected with a connecting plate; the connecting plate is fixed with the side surface of the output panel; a lower fixing plate is arranged at the bottom of the drag chain plate; the lower fixing plate is fixed on the side surface of the X-axis carriage.

3. The six-axis numerical control inner and outer circle compound grinding machine according to claim 2, characterized in that the dynamic and static pressure main shaft workpiece shaft structural member adopts a servo motor belt transmission or permanent magnet servo motor direct connection integrated transmission structure:

when the dynamic and static pressure main shaft workpiece shaft structural part is driven by a servo motor belt, the dynamic and static pressure main shaft workpiece shaft structural part comprises an outer shell, a fixed plate, a motor and a rotating main shaft;

the bottom of the outer shell is fixed on an output panel of the X-axis mechanical structural component and moves on the X axis along with the output panel; the fixed plate is vertical to the output panel and is positioned on the left side of the dynamic and static pressure main shaft workpiece shaft structural part; the motor and the rotating main shaft are distributed on the fixed plate up and down and are positioned on the right side of the fixed plate; the motor is provided with a motor cover; the output end of the motor is connected with a small belt pulley; the input end of the rotating main shaft is provided with a large belt pulley; the small belt pulley and the large belt pulley are positioned on the left side of the fixing plate and are connected through a synchronous belt; the output end of the rotating main shaft is provided with a connecting flange;

a rotary oil hydraulic cylinder or a rotary air cylinder is additionally arranged at the input end of a large belt pulley of the dynamic and static pressure main shaft workpiece shaft structural part; a pull rod is additionally arranged at the central hole of the rotating main shaft, and a hydraulic three-grab or elastic chuck arranged at the output end of the rotating main shaft is tightened or loosened to further clamp the processed workpiece;

the output end of the rotating main shaft is additionally provided with a switching flange or a permanent magnetic circular sucker or a manual three-grab chuck for clamping a workpiece; the permanent magnetic circular sucker is used for sucking a machined workpiece with higher precision;

when the dynamic and static pressure main shaft workpiece shaft structural member adopts a permanent magnet servo motor direct connection integrated type, the dynamic and static pressure main shaft workpiece shaft structural member comprises a main shaft mandrel, a main shaft permanent magnet servo motor, a main shaft shell, a main shaft installation box body and a main shaft oil pressure station mechanism; the main shaft oil pressure station mechanism supplies oil to a main shaft cavity arranged in a main shaft installation box body; an oil inlet and an oil outlet are formed in the main shaft shell;

the spindle shaft is divided into an output part and an input part; the input part of the spindle mandrel is positioned in a rotor inner hole mandrel of a servo motor, and a coaxial integrated mandrel structure is formed between the servo motor and the spindle mandrel;

the thrust tin bronze sleeve, the box body shaft front cover, the radial thrust tin bronze sleeve and the radial inner support tin bronze sleeve are sequentially arranged on the outer side of the output part of the spindle shaft along the direction from the output end to the input end; sleeve shafts of the main shaft shell are arranged outside the radial thrust tin bronze sleeve and the radial inner support tin bronze sleeve; the front end of the output part of the spindle mandrel is connected with a spindle front end output adapter flange; a main shaft mandrel thrust flange is arranged at the rear end of the bearing of the thrust tin bronze sleeve, and the bearing of the radial thrust tin bronze sleeve is positioned at the rear end of the main shaft mandrel thrust flange; a flange surface is arranged on the radial outer side of the thrust tin bronze sleeve; the bearing for radially supporting the tin bronze sleeve is positioned on the outer surface of one side of the output part of the spindle; the radial thrust tin bronze sleeve bearing and the radial tin bronze sleeve bearing are both positioned on the inner side of the shell of the main shaft shell;

the spindle shell penetrates through the spindle mounting box body and is fixed with the front end of the spindle mounting box body; the shell of the servo motor is fixed with the rear end of the main shaft installation box body through a bolt;

the servo motor includes: the device comprises a main shaft permanent magnet servo motor rotor, a main shaft permanent magnet servo motor stator, a permanent magnet servo motor cooling water jacket, a hollow servo permanent magnet motor absolute value encoder, a rear oil hydraulic cylinder connecting flange and a rear oil hydraulic rotary cylinder or air pressure cylinder;

the spindle permanent magnet servo motor rotor, the spindle permanent magnet servo motor stator, the permanent magnet servo motor cooling water jacket and the shell of the servo motor are sequentially positioned on the outer wall of the input part of the spindle from inside to outside; the main shaft permanent magnet servo motor rotor is connected with a main shaft mandrel through an inner bushing and is fixedly installed in a mode of expanding a sleeve and pressing a cover to fasten a bolt;

the shell of the permanent magnet servo motor is cylindrical, the mounting end is flange-shaped, the other end is a power line outlet end, a sealing end cover is arranged, and a hollow servo permanent magnet motor absolute value encoder is fixedly mounted on the outer side of the sealing end cover; the sealing end cover is provided with a central control encoder sealing end cover; the hollow servo permanent magnet motor absolute value encoder is positioned in a sealed end cover of the central control encoder and is connected with the outside through a permanent magnet servo motor outgoing line sealed joint; the input part of the spindle shaft extends out of a rear end sealing end cover of a shell of the permanent magnet servo motor, and the end part of the spindle shaft is connected with a mounting flange of a hydraulic oil cylinder through a bolt; the mounting flange of the hydraulic oil cylinder is connected with a rear oil hydraulic cylinder connecting flange through a bolt;

the spindle mandrel, the spindle mounting box body, the servo motor and the encoder form a full-sealed three-proofing structure; the rear oil pressure rotary cylinder or the pneumatic cylinder is used as a main shaft workpiece rapid clamping and fixing mechanism; the spindle is of a hollow structure and is used for penetrating through the pull rod or communicating with the pull rod to process and produce cutting fluid; the box body shaft front cover is provided with a sealing ring for sealing the thrust tin bronze sleeve bearing; the main shaft mounting box body is of a polyhedral cavity structure, wherein a cavity is formed inside the box; two ends of the main shaft mounting box body are used for supporting and fixing the main shaft; the mounting bottom surface of the spindle mounting box body adopts a small square cavity to avoid space and is provided with reinforcing ribs, and a guide sliding groove is arranged in the middle of the base; the front end and the rear end of the main shaft mounting box body are provided with a plurality of weight avoiding holes below the bottom and the main shaft shell hole, a reinforcing rib is arranged between the holes and the hole wall, oil return port threaded holes are formed in two sides of the bottom of the box body, an oil inlet threaded hole is formed in the upper portion of the box body, a sealing cover plate is arranged at the top of the box body and is locked in and mounted through bolts; the shell of the permanent magnet servo motor is connected with the main shaft mounting box, and the shell of the permanent magnet servo motor is sleeved on the excircle of the cooling water jacket of the permanent magnet servo motor; one end of a shell of the permanent magnet servo motor is provided with a cooling liquid inlet joint, the other end of the shell is provided with a liquid return outlet, and heat generated when the main shaft rotates is taken away through circulation of circulating liquid; the hollow servo permanent magnet motor absolute value encoder consists of an outer magnetic ring, an inner magnetic ring and an encoder reading head, wherein the inner magnetic ring is fixed on a spindle shaft, and the outer magnetic ring and the encoder reading head are fixed on the outer side of a sealing end cover; the inner hole of the spindle mandrel is provided with an inner taper hole of a BT or Mohs structure.

4. The six-axis numerically controlled internal and external circular compound grinding machine as claimed in claim 3, wherein said first Z-axis mechanical structure comprises:

a first Z-axis carriage: the guide rail groove of the first Z-axis carriage is embedded, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove is a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure;

first Z axial lead screw actuating mechanism: the transmission precision structure comprises a Z-axis screw rod, a bearing seat, a bearing and a screw rod nut sleeve; the Z-axis screw rod adopts a high-precision screw rod with the grade of more than C3 and a small lead screw rod with the lead of less than 10, the bearing seats are combined and used by two front and rear bearing seats, each bearing seat is internally provided with 2 high-precision thrust bearings with the grade of more than 7 series P5 which are combined in a matched mode, the screw rod nut sleeve adopts a split nut sleeve, and the flange surface of the nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position of the carriage base through the bearing block, and the mounting position of the bearing block is lower than the guide rail surface; two linear guide rails are respectively arranged on two sides of the screw rod, a sliding block is arranged on the linear guide rails, and the output panel is arranged on the sliding block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the feed screw rotates to drive the nut and the output panel to move on the guide rail;

along the Z-axis direction, two sides of the output panel are connected with shaft seal plates and a cover body of the servo motor through an organ cover; side seal plates are connected to two sides of the output panel; the Z-axis carriage assembly is formed into a sealing protection cover by the side sealing plates and the output panel organ cover; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupler; the servo motor is positioned on the right side of the first Z-axis lead screw driving mechanism;

a drag chain plate is arranged on the front surface of the first Z-axis drag plate; the upper part of the drag chain plate is fixedly connected with a connecting plate; the connecting plate is fixed with the side surface of the output panel; a lower fixing plate is arranged at the bottom of the drag chain plate; the lower fixing plate is fixed on the side surface of the Z-axis carriage.

5. The six-axis numerical control inner and outer circle compound grinding machine according to claim 4, wherein the C-axis indexing rotary table comprises a box body, a motor base, an input shaft, an output shaft, an inner bearing, an outer bearing, a servo motor, a zero-clearance coupling, an output disc and a framework oil seal structure; the input shaft and the output shaft are mounted to the case; the input shaft drives the output shaft to rotate around a central axis; the zero-clearance coupling is connected with a motor shaft and the input shaft of the servo motor; the output shaft is provided with a through hole for a power supply line and/or a water pipe to pass through; the through hole penetrates through the output shaft along the central axis; the inner bearing is arranged in the through hole; the outer ring of the inner bearing is in contact with the inner wall of the through hole; the box body is provided with a wire outlet hole for the electric wire and/or the water pipe penetrating through the through hole to penetrate out; the motor base is fixed to the input end of the box body; the servo motor is mounted to the motor base; the hole depth direction of the wire outlet hole is perpendicular to the hole depth direction of the through hole and is parallel to the rotation axis of the input shaft; the input shaft is a double-enveloping cambered surface worm; a plurality of needle roller bearings are arranged on the periphery of the output shaft; the needle roller bearings are uniformly distributed along the circumferential direction of the central axis; the outer bearing is sleeved on the periphery of the output shaft; the outer bearing is a crossed roller bearing or a turntable bearing, and the inner ring and the outer ring of the bearing are fixed by bolts; the output disc is fixed to the output shaft; the output disc and the bearing gland form a waterproof labyrinth structure; the framework oil seal structure is arranged on the periphery of the output shaft; the outer bearing is provided with a bearing gland used for fixing the position of the outer bearing; the bearing gland is fixed on the box body; the box body is provided with an outer arc surface and a weight reduction groove; the outer arc surface and the weight reduction groove are positioned on two sides of the box body.

6. The six-axis numerically controlled internal and external circular compound grinding machine as claimed in claim 5, wherein said second Z-axis motorized spindle translation mechanical structure comprises:

planker: the guide rail groove of the carriage is embedded, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove is a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure; the carriage is fixed on the fixed seat;

the screw rod driving mechanism comprises: the transmission precision structure comprises a screw rod, a bearing seat, a bearing and a screw rod nut sleeve; the lead screw adopts a high-precision lead screw with a grade above C3 and a small lead screw with a lead below 10, the bearing seats are combined by a front bearing seat and a rear bearing seat, each bearing seat is internally provided with 27 series high-precision thrust bearings with the grade above P5 which are combined in a matched mode, the lead screw nut sleeve adopts a split nut sleeve, and the flange surface of the nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position of the carriage base through the bearing block, and the mounting position of the bearing block is lower than the guide rail surface; two linear guide rails are respectively arranged on two sides of the screw rod, a sliding block is arranged on the linear guide rails, and the output panel is arranged on the sliding block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the feed screw rotates to drive the nut and the output panel to move on the guide rail;

two sides of the output panel are connected with the shaft sealing plate and the cover body of the servo motor through the organ cover; side seal plates are connected to two sides of the output panel; the carriage assembly is formed into a sealing protection cover by the side sealing plates and the output panel organ cover; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupler; the servo motor is positioned on the right side of the screw rod driving mechanism;

the output panel is provided with a permanent magnet synchronous high-speed electric spindle; the rotating speed of the electric spindle is 5000-; the output end of the electric spindle faces the static pressure spindle workpiece shaft structural part; and an inner circle grinding wheel is arranged at the output end of the electric spindle.

7. The six-axis numerically controlled internal and external circular compound grinding machine as claimed in claim 6, wherein said third Z-axis mechanical structure comprises:

a third Z-axis carriage: the guide rail groove of the third Z-axis carriage is embedded, and the two guide rail grooves are parallel in the same plane; the guide rail matched with the guide rail groove is a roller-shaped rectangular guide rail; the rolling column-shaped rectangular guide rails are matched with rolling column-shaped sliding blocks, and each guide rail adopts 2 sliding blocks for matching use; the guide rail and the sliding block form a plane precision structure;

the third Z-axis screw rod driving mechanism: the transmission precision structure comprises a Z-axis screw rod, a bearing seat, a bearing and a screw rod nut sleeve; the Z-axis screw rod adopts a high-precision screw rod with the grade of more than C3 and a small lead screw rod with the lead of less than 10, the bearing seats are combined and used by two front and rear bearing seats, each bearing seat is internally provided with 2 high-precision thrust bearings with the grade of more than 7 series P5 which are combined in a matched mode, the screw rod nut sleeve adopts a split nut sleeve, and the flange surface of the nut is connected with the output panel to form a 90-degree right-angle surface; two ends of the screw rod are arranged in bearings of the bearing block, two ends of the screw rod are fixed on the central position of the carriage base through the bearing block, and the mounting position of the bearing block is lower than the guide rail surface; two linear guide rails are respectively arranged on two sides of the screw rod, a sliding block is arranged on the linear guide rails, and the output panel is arranged on the sliding block; the output panel is connected with the feed screw nut sleeve and the feed screw nut, and the feed screw rotates to drive the nut and the output panel to move on the guide rail;

along the Z-axis direction, two sides of the output panel are connected with shaft seal plates and a cover body of the servo motor through an organ cover; side seal plates are connected to two sides of the output panel; the Z-axis carriage assembly is formed into a sealing protection cover by the side sealing plates and the output panel organ cover; the output end of the servo motor is connected with the input end of the screw rod through a zero-clearance coupler; the servo motor is positioned on the right side of the third Z-axis lead screw driving mechanism;

a drag chain plate is arranged on the back surface of the third Z-axis drag plate; the upper part of the drag chain plate is fixedly connected with a connecting plate; the connecting plate is fixed with the side surface of the output panel; a lower fixing plate is arranged at the bottom of the drag chain plate; the lower fixing plate is fixed on the side surface of the Z-axis carriage.

8. The six-axis numerical control internal and external circular composite grinding machine according to claim 7, characterized in that the measuring head driving mechanism adopts a U-axis translation mechanical structure or a B-axis indexing table;

when the measuring head driving mechanism adopts a U-axis translation mechanical structural part, the U-axis mechanical structural part comprises a U-axis carriage, a U-axis module, a U-axis servo motor and a U-axis organ cover; the bottom of the U-axis carriage is arranged on an output panel of a third Z-axis mechanical structural part, and the U-axis module is arranged on the U-axis carriage; a nut sleeve is fixedly arranged on a U-axis output panel of the U-axis module, a U-axis screw rod is fixedly arranged in the U-axis module, two ends of the U-axis screw rod are arranged in the U-axis module through U-axis bearing seats, and the U-axis module is transversely arranged on the U-axis carriage through the matching of the U-axis screw rod and the nut sleeve; the U-axis module is externally covered with U-axis organ covers at two ends of the U-axis output panel, and the U-axis organ covers are in a square-tube integral sealing seamless design and are connected with a side plate metallographic phase of the U-axis output panel to form a closed movable cavity; the U-axis servo motor is positioned on the right side of the U-axis mechanical structural part, and the output end of the U-axis servo motor is connected with the input end of a U-axis screw rod through a zero-clearance coupling;

when the measuring head driving mechanism adopts a B-axis indexing table, the measuring head driving mechanism comprises a harmonic speed reducer bracket, a harmonic speed reducer, a servo motor and a motor cover; the harmonic speed reducer support is fixed on an output panel of the first Z-axis mechanical structural part; the harmonic speed reducer is vertically fixed on the harmonic speed reducer support, and the output direction of the harmonic speed reducer is a Z-axis vertical plane and faces backwards; the output end of the servo motor is connected with the input end of the harmonic speed reducer; and the output end of the harmonic speed reducer is fixedly connected with the bottom side surface of the trigger type three-dimensional measuring head through a bolt.

9. The six-axis numerical control internal and external circle compound grinding machine according to claim 8, characterized in that the dynamic and static pressure grinding wheel spindle structural member adopts a servo motor belt transmission or permanent magnet servo motor direct connection integrated transmission structure:

when the dynamic and static pressure grinding wheel spindle structural part is driven by a servo motor belt, the dynamic and static pressure grinding wheel spindle structural part comprises an outer shell, a fixed plate, a motor and a rotating spindle;

the bottom of the fixed plate is fixed on an output panel of a third Z-axis carriage and moves on the Z axis along with the output panel; the motor and the rotating main shaft are distributed up and down on the fixing plate, and a middle fixing plate is arranged between the motor and the rotating main shaft; the rotating main shaft is parallel to the Z axis, and the output end faces the left side; the motor is provided with a motor cover; the output end of the motor is arranged on the right side and is connected with a small belt pulley; the input end of the rotating main shaft is positioned on the right side and is provided with a large belt pulley; the small belt pulley and the large belt pulley are connected through a synchronous belt; the output end of the rotating main shaft is connected with a large grinding wheel;

the outer circle grinding wheel of the grinding wheel spindle of the dynamic and static pressure main shaft is connected through a taper hole flange, and a dynamic balance adjusting balancing weight or an adjusting screw is arranged on the outer side of the flange; the output shaft end of the dynamic and static pressure main shaft grinding wheel shaft is provided with a reverse thread external thread or a grinding wheel connecting rod connected with an internal thread hole; when the grinding wheel connecting rod is installed, a cup-shaped grinding wheel for grinding an inner hole is additionally installed on the grinding wheel connecting rod and is used for grinding a large inner hole;

when the dynamic and static pressure grinding wheel spindle structural part adopts a permanent magnet servo motor direct connection integrated type, the dynamic and static pressure grinding wheel spindle structural part comprises a spindle mandrel, a spindle permanent magnet servo motor, a spindle shell, a spindle mounting box body and a spindle oil pressure station mechanism; the main shaft oil pressure station mechanism supplies oil to a main shaft shell cavity arranged in a main shaft installation box body; an oil inlet, an oil outlet and a sealing element are arranged on the main shaft shell; the spindle shaft is divided into an output part and an input part; the input part of the spindle mandrel is positioned in a rotor inner hole mandrel of a servo motor, and a coaxial integrated mandrel structure is formed between the servo motor and the spindle mandrel; the thrust tungsten steel sleeve bearing, the thrust flange of the spindle, the radial thrust tungsten steel sleeve bearing and the radial inner support tungsten steel sleeve bearing are sequentially arranged on the outer side of the output part of the spindle along the direction from the output end to the input end; sleeve shafts of the main shaft shell are arranged outside the radial thrust tungsten steel sleeve bearing and the radial inner support tungsten steel sleeve bearing; a flange surface is arranged on the radial outer side of the thrust tungsten steel sleeve bearing; the bearing of the radial inner supporting tungsten steel sleeve bearing is positioned on the outer surface of one side of the output part of the spindle; the radial thrust tungsten steel sleeve bearing and the radial tungsten steel sleeve bearing are both positioned on the inner side of the shell of the spindle shell; a box body shaft front cover is arranged on one side of the output end of the spindle mandrel of the spindle shell; the inner side of the box body shaft front cover is matched with the thrust tungsten steel sleeve bearing for sealing; the spindle shell penetrates through the spindle mounting box body and is fixed with the front end of the spindle mounting box body; the shell of the servo motor is fixed with the rear end of the main shaft installation box body through a bolt; the servo motor includes: the device comprises a main shaft permanent magnet servo motor rotor, a main shaft permanent magnet servo motor stator, a permanent magnet servo motor cooling water jacket, a hollow servo permanent magnet motor absolute value encoder, a rear oil hydraulic cylinder connecting flange and a rear oil hydraulic rotary cylinder or air pressure cylinder; the spindle permanent magnet servo motor rotor, the spindle permanent magnet servo motor stator, the permanent magnet servo motor cooling water jacket and the shell of the servo motor are sequentially positioned on the outer wall of the input part of the spindle from inside to outside; the main shaft permanent magnet servo motor rotor is connected with a main shaft mandrel through an inner bushing and is fixedly installed in a mode of expanding a sleeve and pressing a cover to fasten a bolt; the shell of the permanent magnet servo motor is cylindrical, the mounting end is flange-shaped, the other end is a power line outlet end, a sealing end cover is arranged, and a hollow servo permanent magnet motor absolute value encoder is fixedly mounted on the outer side of the sealing end cover; the sealing end cover is provided with a central control encoder sealing end cover; the hollow servo permanent magnet motor absolute value encoder is positioned in a sealed end cover of the central control encoder and is connected with the outside through a permanent magnet servo motor outgoing line sealed joint; the input part of the spindle shaft extends out of a rear end sealing end cover of a shell of the permanent magnet servo motor, and the end part of the spindle shaft is connected with a mounting flange of a hydraulic oil cylinder through a bolt; the mounting flange of the hydraulic oil cylinder is connected with a rear oil hydraulic cylinder connecting flange through a bolt; the spindle mandrel, the spindle mounting box body, the servo motor and the encoder form a full-sealed three-proofing structure; the rear oil pressure rotary cylinder or the pneumatic cylinder is used as a main shaft workpiece rapid clamping and fixing mechanism;

the input part of the spindle shaft is of a hollow structure, and the output part of the spindle shaft is of a solid structure; the output end of the output part of the spindle adopts a flat end structure and is used for connecting an output grinding wheel flange; the output end of the output part of the spindle adopts an external conical structure and is used for connecting an internal conical grinding wheel flange; the grinding wheel flange plate is provided with an online dynamic balance adjusting block and a plurality of adjusting bolts; the output end of the output part of the spindle is provided with a reverse thread for installing a flange fastening nut or switching a small-diameter grinding wheel shaft lever or a boring cutter or a milling cutter head, the periphery of the grinding wheel shaft lever is provided with a plurality of dynamic balance adjusting bolts, and the grinding wheel shaft lever locking nut is provided with a plurality of dynamic balance adjusting bolts; the grinding wheel shaft rod is used for grinding the inner hole and the inner wall of the workpiece; the hollow structure part of the spindle mandrel is introduced into a cooling reflux circulating device, and the input end of the input part of the spindle mandrel is provided with a high-pressure oil inlet hole which shares an oil outlet with the cavity of the spindle shell to form a sealed liquid flow circulating inner cavity; the oil inlet is provided with a switching rolling seal bearing and a switching flange, and when the spindle of the main shaft rotates at a high speed, a connected hydraulic pipe joint and a pipeline are not moved; a plurality of small holes for refrigerating and refluxing are arranged in the spindle; the box body shaft front cover is provided with a sealing ring for sealing the thrust tungsten steel sleeve bearing; the main shaft mounting box body is of a polyhedral cavity structure, wherein a cavity is formed inside the box; two ends of the main shaft mounting box body are used for supporting and fixing the main shaft; the mounting bottom surface of the spindle mounting box body adopts a small square cavity to avoid space and is provided with reinforcing ribs, and a guide sliding groove is arranged in the middle of the base; the front end and the rear end of the main shaft mounting box body are provided with a plurality of weight avoiding holes below the bottom and the main shaft shell hole, a reinforcing rib is arranged between the holes and the hole wall, oil return port threaded holes are formed in two sides of the bottom of the box body, an oil inlet threaded hole is formed in the upper portion of the box body, a sealing cover plate is arranged at the top of the box body and is locked in and mounted through bolts; the shell of the permanent magnet servo motor is connected with the main shaft mounting box, and the shell of the permanent magnet servo motor is sleeved on the excircle of the cooling water jacket of the permanent magnet servo motor; one end of a shell of the permanent magnet servo motor is provided with a cooling liquid inlet joint, the other end of the shell is provided with a liquid return outlet, and heat generated when the main shaft rotates is taken away through circulation of circulating liquid; the hollow servo permanent magnet motor absolute value encoder consists of an outer magnetic ring, an inner magnetic ring and an encoder reading head, wherein the inner magnetic ring is fixed on a spindle shaft, and the outer magnetic ring and the encoder reading head are fixed on the outer side of a sealing end cover; the inner hole of the spindle mandrel is provided with an outer cone of a BT or Mohs structure and a screw with a reverse thread.