CN214517990U - Numerical control worm grinding wheel gear grinding machine - Google Patents

Numerical control worm grinding wheel gear grinding machine Download PDF

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Publication number
CN214517990U
CN214517990U CN202120201175.4U CN202120201175U CN214517990U CN 214517990 U CN214517990 U CN 214517990U CN 202120201175 U CN202120201175 U CN 202120201175U CN 214517990 U CN214517990 U CN 214517990U
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China
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grinding wheel
workpiece
grinding
supporting plate
carriage
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CN202120201175.4U
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张向国
王永刚
柴宾
李亚辉
赵晶
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Qinchuan Machine Tool Group Co ltd
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Qinchuan Machine Tool Group Co ltd
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Abstract

The utility model discloses a numerical control worm grinding wheel gear grinding machine, which comprises a base, wherein a rotatable workpiece clamping mechanism and a movable processing mechanism are arranged on the upper end of the base in a contraposition manner; the workpiece clamping mechanism comprises a workpiece upright post arranged on the base, a workpiece frame capable of moving up and down is arranged on the inner side of the workpiece upright post, a workpiece rotating workbench is arranged at the lower end of the workpiece frame, and a clamp for mounting a workpiece is arranged on the upper surface of the workpiece rotating workbench; the upper end of the workpiece frame is provided with a tailstock capable of moving up and down; the processing mechanism comprises a grinding wheel upright post movably arranged on the base, a rotatable grinding wheel frame deflection bracket is arranged on the inner side of the grinding wheel upright post, and a grinding wheel device for grinding a workpiece and a grinding wheel finishing device for finishing the grinding wheel are arranged on the grinding wheel frame deflection bracket; the utility model discloses alleviateed the overall weight of lathe and not weakened the whole rigidity of lathe, still improved the machining efficiency of lathe, stabilized the machining precision of lathe.

Description

Numerical control worm grinding wheel gear grinding machine
Technical Field
The utility model relates to a machining equipment technical field especially relates to a numerical control worm wheel gear grinding machine.
Background
In the prior art, the layout structure of each numerical control shaft of the numerical control worm grinding wheel gear grinding machine with medium-sized processing specifications mostly adopts the following mode: the workpiece part is fixed on the base by adopting a vertical main shaft, and meanwhile, an auxiliary upright post part for supporting the tailstock to move is fixed on the base; the base is also provided with a main upright post part, the main upright post can horizontally move along the longitudinal direction of the lathe bed to perform feeding motion along the radial direction of a workpiece, the main upright post is provided with a vertical feeding supporting plate capable of axially moving along the workpiece, the vertical feeding supporting plate is provided with a grinding wheel grinding installation angle rotary supporting plate, the installation angle rotary supporting plate is provided with a grinding wheel axial feeding supporting plate moving along the tangential direction of the workpiece, and the grinding wheel axial feeding supporting plate is provided with a grinding wheel spindle and a grinding wheel; the base is also provided with a grinding wheel dresser part, and a set of more complex rotating device or other devices are generally required to be designed for avoiding a grinding station by the grinding wheel dresser part. The main defect of the structural layout is that 5 important numerical control shafts (X, Y, Z, A, B) which influence the machining precision of the machine tool are integrated on the main upright post component, so that the volume and the weight of the main upright post component are increased, the manufacturing difficulty is increased, the component precision maintaining time of the machine tool is reduced, and the overall performance of the machine tool is influenced.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects or shortcomings, the utility model aims to provide a numerical control worm grinding wheel gear grinding machine; the problems that in the prior art, the number of main upright post parts integrated with important numerical control shafts is too large, the manufacturing difficulty is high, and the part precision retention time is shortened are solved.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a numerical control worm grinding wheel gear grinding machine comprises a base, wherein a rotatable workpiece clamping mechanism and a movable machining mechanism are arranged at the upper end of the base in a contraposition mode;
the workpiece clamping mechanism comprises a workpiece upright post arranged on a base, a workpiece frame capable of moving up and down is arranged on the inner side of the workpiece upright post, a workpiece rotating workbench is arranged at the lower end of the workpiece frame, and a clamp for installing a workpiece is arranged on the upper surface of the workpiece rotating workbench; the upper end of the workpiece frame is provided with a tailstock capable of moving up and down, and the tailstock is matched with the clamp to firmly clamp the workpiece;
the machining mechanism comprises a grinding wheel upright post movably mounted on the base, a rotatable grinding wheel carriage deflection bracket is mounted on the inner side of the grinding wheel upright post, and a grinding wheel device for grinding workpieces and a grinding wheel finishing device for finishing grinding wheels are mounted on the grinding wheel carriage deflection bracket.
The fixture fixes the workpiece by clamping a mandrel matched with the workpiece; the lower end of the tailstock is provided with a thimble, and when a workpiece is clamped stably, the thimble tightly pushes the workpiece; the central axis of the clamp coincides with the central axis of the thimble at the lower end of the tailstock.
One side of the tailstock is connected with a first linear driving device arranged at the upper end of the workpiece frame through a tailstock supporting plate; the workpiece rotating workbench is driven by a direct-drive servo motor; the workpiece frame is arranged on the workpiece upright post through a second linear driving device; the second linear driving device is a servo oil cylinder, and a piston rod of the servo oil cylinder is connected with the workpiece frame.
The grinding wheel upright post is arranged on the base through a third linear motion device; the grinding carriage deflection bracket is mounted on the grinding wheel upright post through a needle bearing and driven through gear transmission.
The grinding wheel device comprises a grinding carriage which is arranged on a grinding carriage deflection bracket and can move along the Y-axis direction, a grinding wheel spindle is arranged in the grinding carriage along the Y-axis direction, a worm grinding wheel is arranged at one end of the grinding wheel spindle, and the worm grinding wheel grinds a workpiece.
The grinding carriage is arranged at the lower part of the grinding carriage deflection bracket through a fourth linear motion device and can horizontally move along the Y-axis direction; the fourth linear motion device comprises a servo motor of the grinding carriage, a roller linear rail arranged on a deflection bracket of the grinding carriage, and a ball screw pair used for driving the grinding carriage to move linearly, wherein the power output end of the servo motor of the grinding carriage is connected with a screw shaft of the ball screw pair, a nut of the ball screw pair is connected with the grinding carriage, and the grinding carriage is also connected with a slide block of the roller linear rail.
The grinding wheel dressing device comprises a grinding wheel dressing device base arranged on a grinding carriage deflection bracket, a first supporting plate moving along the Y-axis direction is arranged on the grinding wheel dressing device base, a second supporting plate moving up and down along the Z-axis direction is arranged on the first supporting plate, a dressing spindle is arranged on the second supporting plate, the central axis of the dressing spindle is parallel to the central axis of the grinding wheel spindle, and a dressing roller is sleeved on the dressing spindle.
The dressing main shaft adopts a direct-drive main shaft, and the first supporting plate is arranged on a base of the grinding wheel dressing device through a fifth linear motion device; the second supporting plate is arranged on the first supporting plate through a sixth linear motion device.
The trimming main shaft is arranged on the second supporting plate through a trimmer pressure angle supporting plate with an adjustable angle, the trimmer pressure angle supporting plate can be adjusted in a left-right rotating mode within a range of plus or minus 5 degrees around the Z axis, and the trimmer pressure angle supporting plate can be adjusted in a up-down rotating mode within a range of plus or minus 3 degrees around the X axis; the dresser pressure angle supporting plate is connected with a dressing main shaft through a dresser mounting bracket, and the dressing main shaft is mounted in the dresser mounting bracket.
The machining mechanism further comprises a cooling device for cooling and lubricating the grinding wheel, the cooling device comprises a cooling nozzle moving mechanism, a cooling nozzle is mounted at the moving end of the cooling nozzle moving mechanism, and the cooling nozzle is communicated with the cooling liquid accommodating cavity through a pipeline; and a liquid outlet of the cooling nozzle is positioned at the grinding position of the worm grinding wheel.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a numerical control worm grinding wheel gear grinding machine, which adopts a workpiece clamping mechanism arranged on a base, a workpiece is clamped and fixed by a workpiece rotating workbench in the workpiece clamping mechanism and can rotate around a workpiece shaft, and the workpiece can move up and down along the direction of the workpiece shaft (namely the Z shaft of a numerical control shaft) through a workpiece frame; meanwhile, a tailstock capable of moving along the axial direction of the workpiece is adopted to tightly and stably push the workpiece; the grinding wheel stand is characterized in that the grinding wheel stand is provided with a grinding wheel support, the grinding wheel support is provided with a grinding wheel stand column, the grinding wheel stand column is arranged on the grinding wheel support, the grinding wheel stand column is arranged on the grinding wheel stand column, the grinding wheel stand column is arranged on the grinding wheel stand column, and the grinding wheel stand column, and the grinding wheel stand column is arranged on the grinding wheel stand column, and the grinding wheel stand column is arranged on the grinding wheel stand column, and the grinding wheel stand column, and the grinding wheel stand column is arranged on the grinding wheel stand column, and the grinding wheel stand column, the grinding wheel stand column is arranged on the grinding wheel stand column, and the grinding wheel stand column, the grinding wheel stand column is arranged on the grinding wheel stand column, the grinding wheel stand column. The grinding wheel dressing device is movably mounted on the grinding carriage deflection bracket, a dressing roller in the grinding wheel dressing device can move along the Y-axis direction and can also move up and down along the Z-axis direction through the movement of a dressing main shaft, so that the dressing roller is pressed against the worm tooth groove surface of the worm grinding wheel, further, the dressing roller can adjust the pressure angle of the tooth groove spiral surface of the worm grinding wheel on two sides through a dressing pressure angle supporting plate, and the worm grinding wheel is dressed, so that the grinding machining size of the worm grinding wheel to a workpiece is more accurate; compared with the prior art, the device reduces the number of the auxiliary motion shafts returning to the initial position when the grinding wheel is dressed, and improves the dressing efficiency of the grinding wheel; although the workpiece clamping mechanism increases the weight and the number of moving shafts, the rigidity is enhanced, the workpiece frame adopts a hydraulic oil cylinder controlled by an electromagnetic proportional directional valve servo to drive the workpiece to move axially, the service life and the bearing capacity of the moving shaft in the direction are prolonged, and the weight of a tailstock system is reduced; and the workpiece rotary worktable adopts a direct-drive main shaft structure, so that the response speed and the control precision of each shaft are improved. Therefore, the utility model discloses alleviate the gross weight of lathe and do not weaken the whole rigidity of lathe, still improved the machining efficiency of lathe, stabilized the machining precision of lathe.
Drawings
FIG. 1 is a schematic view of the structure of the device of the present invention;
fig. 2 is a schematic view of the installation structure of the pressure angle adjusting supporting plate and the second supporting plate of the dresser and the dressing main shaft in the device of the present invention.
In the figure, 1 — base; 2-workpiece column; 3, a workpiece frame; 4-workpiece rotating table; 5, clamping; 6, a workpiece; 7, a thimble; 8-tailstock supporting plate; 9-tailstock; 10-tailstock moving servo motor; 11-a grinding carriage; 12-worm grinding wheel; 13-grinding wheel spindle; 14-grinding wheel column; 15-ball screw pair; 16-a wheel carriage deflection bracket; 17-grinding wheel dressing device base; 18-a first pallet; 19-a second pallet; 20-a second pallet servo motor; 21-a trimmer pressure angle adjusting supporting plate; 22-cooling nozzle moving mechanism; 23-trimming the main shaft; 24-dressing rollers; 25-a cooling nozzle; 26-a dresser mounting bracket; 27-1 — upper guide rollers; 27-2-lower guide rollers; 28-1 — a first clamping screw; 28-2 — a second clamping screw; 29-1 — a first adjusting screw; 29-2 — a second adjusting screw; 30-a pin shaft; 31-1-upper arc guide groove; 31-2-lower arc guide groove; 32-first pallet hydraulic ram.
Detailed Description
The present invention will be described in detail with reference to the drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, a numerical control worm grinding wheel gear grinding machine comprises a base 1, wherein a rotatable workpiece clamping mechanism and a movable machining mechanism are arranged at the upper end of the base 1 in an aligned manner;
the workpiece clamping mechanism comprises a workpiece upright post 2 arranged on a base 1, a workpiece frame 3 capable of moving up and down is arranged on the inner side of the workpiece upright post 2, a workpiece rotating workbench 4 is arranged at the lower end of the workpiece frame 3, and a clamp 5 for installing a workpiece 6 is arranged on the upper surface of the workpiece rotating workbench 4; the upper end of the workpiece frame 3 is provided with a tailstock 9 capable of moving up and down; the tailstock 9 and the clamp 5 are respectively positioned at the upper side and the lower side of the workpiece 6 for clamping, so that the processing stability is ensured; specifically, the fixture 5 fixes the workpiece 6 by clamping a mandrel matched with the workpiece 6, the lower end of the tailstock 9 is provided with a thimble 7, and the thimble is used for tightly pushing the workpiece 6, so that the processing stability of the workpiece 6 is ensured; furthermore, the central axis of the clamp 5 coincides with the central axis of the thimble 7 at the lower end of the tailstock 9.
In the utility model, one side of the tailstock 9 is connected with the mobile output end of the first linear driving device through the tailstock supporting plate 8, and the tailstock 9 is controlled to move up and down; the first linear driving device is mounted at the upper end of the work rest 3.
Specifically, the first linear driving device comprises a tailstock mobile servo motor 10, a first guide rail arranged on the workpiece frame 3, and a first lead screw arranged in the first guide rail, wherein the first guide rail is arranged at the upper end of the workpiece frame 3 through a screw or a bolt; the first screw rod is provided with a first sliding block (namely a mobile output end) which is matched with the first screw rod, and the first screw rod is connected with the power output end of the tailstock mobile servo motor 10.
Further, based on the above embodiment, the first linear driving device may also be a numerical control linear guide rail sliding table, the sliding table of the numerical control linear guide rail sliding table is connected with the tailstock supporting plate 8, and the tailstock supporting plate 8 is engaged with the guide rail of the numerical control linear guide rail sliding table; further, the first linear driving device can also be a linear electric cylinder, a ball screw linear sliding table (screw transmission) and a belt transmission, and can be a linear motion device capable of controlling up-and-down displacement.
Preferably, the workpiece rotating table 4 is driven by a direct-drive servo motor, when the workpiece rotating table 4 rotates, a mandrel clamped by the clamp 5 is driven to rotate, and the mandrel penetrates through the workpiece 6 and is assembled into a whole, so that the workpiece 6 is driven to rotate synchronously; the thimble 7 at the lower end of the tailstock 9 props against the upper surface of the mandrel, so that the workpiece 6 is tightly pushed, and the processing stability and the processing precision of the workpiece 6 are ensured.
In the utility model, the workpiece frame 3 is mounted on the workpiece upright 2 through a second linear driving device; the second linear driving device is a servo oil cylinder, and a piston rod of the servo oil cylinder is connected with the workpiece frame 3; preferably, the second linear driving device further comprises a second guide rail, a sliding plate is clamped on the second guide rail, and the sliding plate is connected with the workpiece rack 3; the servo oil cylinder is arranged on the base 1, a piston rod of the servo oil cylinder is connected with the sliding plate, and when the servo oil cylinder works, the servo oil cylinder controls the telescopic stroke and the moving position of the piston rod, so that the sliding plate can move up and down, and the workpiece frame 3 is pushed to move up and down.
It should be noted that the working principle of the servo cylinder is as follows: the servo oil cylinder consists of a stepping motor, an electromagnetic proportional directional valve, a linear displacement feedback grating ruler arranged on the second guide rail sliding plate and an oil cylinder. When the proportional directional valve is driven to work by an analog quantity instruction sent by the numerical control system, the linear displacement feedback grating ruler is used for feeding back the position of the sliding plate (namely the real-time position of the workpiece frame 3) in real time, a position signal is fed back to the numerical control system, then the proportional directional valve is driven to move a preset stroke through the numerical control system, and the advancing displacement and the advancing speed of the oil cylinder are regulated and controlled through the numerical control system according to the fed back signal to form a closed-loop control loop.
In the utility model, the processing mechanism comprises a grinding wheel upright post 14 movably arranged on a base 1, a rotatable grinding wheel carriage deflection bracket 16 is arranged on the inner side of the grinding wheel upright post 14, and a grinding wheel device for grinding a workpiece 6 and a grinding wheel finishing device for finishing a grinding wheel are arranged on the grinding wheel carriage deflection bracket 16; the grinding wheel upright column 14 is arranged on the base 1 through a third linear motion device, so that a grinding wheel device on the grinding carriage deflection bracket 16 is driven to feed in the X-axis direction and move close to the workpiece 6; the third linear motion device is a ball screw and converts rotary motion into linear motion.
Preferably, the grinding carriage deflection bracket 16 is mounted on the grinding wheel column 14 through a needle bearing and can rotate around an X axis (i.e., an a axis of the numerical control shaft), and the needle bearing and the grinding wheel column 14 are locked manually; the grinding carriage deflection bracket 16 is driven to rotate through gear transmission, and it should be noted that a driving gear is connected with a power output end of a gear-driven servo motor and meshed with a driven gear on the grinding carriage deflection bracket 16, so that the grinding carriage deflection bracket 16 is driven to rotate.
In the example, the mode is manual, and the mode can also be driven by a servo motor or a hydraulic motor, the deflection angle of the grinding carriage deflection bracket 16 when the servo motor is used for driving is fed back by a servo motor encoder, and the deflection angle of the grinding carriage deflection bracket 16 when the manual or hydraulic motor is used for driving is displayed by a graduated scale.
Specifically, the third linear motion device includes a ball screw pair 15, a third guide slide rail mounted on the base 1, and a third slide plate matched with the third guide slide rail, the third slide plate is mounted on the lower end surface of the grinding wheel upright post 14, a screw shaft of the ball screw pair 15 is mounted on the grinding wheel upright post 14, one end of the screw shaft of the ball screw pair 15 is connected with a power output end of a third servo motor, a nut of the ball screw pair 15 is connected with the base 1 through a nut seat, and when the third servo motor works, the screw shaft of the ball screw pair 15 is matched with the nut to drive the grinding wheel upright post 14 to slide on the third guide slide rail on the upper surface of the base 1.
It should be noted that the ball screw assembly 15 is composed of a screw shaft, a screw nut, a steel ball, a pre-pressing piece, a reverser, and a dust catcher. The function of the device is to convert the rotary motion into linear motion, and because a plurality of balls are arranged between a screw shaft and a screw nut of the ball screw pair to do rolling motion, higher motion efficiency can be obtained.
Further, the grinding wheel device comprises a grinding wheel frame 11 which is arranged on a grinding wheel frame deflection bracket 16 and can move along the Y-axis direction, a grinding wheel spindle 13 is arranged in the grinding wheel frame 11 along the Y-axis direction, a worm grinding wheel 12 is arranged at one end of the grinding wheel spindle 13, the worm grinding wheel 12 rotates along with the rotation of the grinding wheel spindle 13 (namely, the B axis of a numerical control shaft), and the worm grinding wheel 12 grinds the workpiece 6.
Specifically, the grinding carriage 11 is mounted on the lower part of the grinding carriage deflection bracket 16 through a fourth linear motion device and can horizontally move along the Y-axis direction; the fourth linear motion device comprises a servo motor of the grinding carriage 11, a roller linear rail arranged on a deflection bracket 16 of the grinding carriage, and a ball screw pair used for driving the grinding carriage 11 to move linearly, wherein the roller linear rail is used for bearing the grinding carriage 11 and guiding, and the ball screw pair is used for converting circular motion into linear motion and playing a role in power transmission; the power output end of a servo motor of the grinding carriage 11 is connected with a screw shaft of a ball screw pair, a nut of the ball screw pair is connected with the grinding carriage 11, and the grinding carriage 1 is also connected with a slide block of a roller linear rail; when the screw shaft of the ball screw pair rotates, the grinding carriage 1 is driven to move linearly on the roller linear rail, so that the position of the worm grinding wheel 12 in the Y-axis direction is adjusted. It should be noted that the roller linear rail and the ball screw assembly are all in the prior art, and can be directly taken for transportation, and are not described herein again.
Further, the grinding wheel dressing device comprises a grinding wheel dressing device base 17 installed on the grinding carriage deflection bracket 16, a first supporting plate 18 moving along the Y-axis direction is installed on the grinding wheel dressing device base 17, a second supporting plate 19 moving up and down along the Z-axis direction is installed on the first supporting plate 18, a dressing main shaft 23 with an adjustable pressure angle is installed on the second supporting plate 19, the central axis of the dressing main shaft 23 is parallel to the central axis of the grinding wheel main shaft 13, a dressing roller 24 is sleeved on the dressing main shaft 23, and the dressing roller 24 is matched with the worm grinding wheel 12.
Specifically, the trimming spindle 23 is a direct-drive spindle (i.e., a rotor of a frameless servo motor is sleeved in the middle of a mandrel of the trimming spindle 23 and integrated with the trimming spindle 23), and the first supporting plate 18 is mounted on the grinding wheel trimming device base 17 through a fifth linear motion device; the fifth linear motion device comprises a fifth guide rail arranged on the grinding wheel dressing device base 17 and a first supporting plate hydraulic oil cylinder 32 used for driving the first supporting plate 18 to move along the Y-axis direction, the telescopic end of the first supporting plate hydraulic oil cylinder 32 is connected with the first supporting plate 18, and the first supporting plate 18 is clamped with the fifth guide rail; the second supporting plate 19 is mounted on the first supporting plate 18 through a sixth linear motion device, the sixth linear motion device comprises a sixth guide slide rail mounted on the first supporting plate 18, a ball screw and a second supporting plate servo motor 20, the power output end of the second supporting plate servo motor 20 is connected with a screw shaft of the ball screw, a nut of the ball screw is connected with the second supporting plate 19, and the second supporting plate 19 is clamped on the sixth guide slide rail.
Further, as shown in fig. 2, the trimming spindle 23 is mounted on the second supporting plate 19 through a trimmer pressure angle supporting plate 21 with an adjustable angle, the trimmer pressure angle supporting plate 21 can be adjusted to rotate left and right within a range of plus or minus 5 ° around the Z axis, and the trimmer pressure angle supporting plate 21 can be adjusted to rotate up and down within a range of plus or minus 3 ° around the X axis; the dresser pressure angle supporting plate 21 is connected with a dressing main shaft 23 through a dresser mounting bracket 26, and the dressing main shaft 23 is mounted in the dresser mounting bracket 26.
Specifically, an upper arc-shaped guide groove 31-1 and a lower arc-shaped guide groove 31-2 which are parallel to each other are formed in the mounting surface of the second supporting plate 19, and an upper guide roller 27-1, a lower guide roller 27-2 and a first clamping screw 28-1 are mounted on the trimmer pressure angle supporting plate 21; the upper guide roller 27-1 is positioned in the upper arc-shaped guide groove 31-1 and is in clearance fit with the upper arc-shaped guide groove, and the lower guide roller 27-2 is positioned in the lower arc-shaped guide groove 31-2 and is in clearance fit with the lower arc-shaped guide groove; two sides of the trimmer pressure angle supporting plate 21 are provided with first adjusting screws 29-1; when the dresser pressure angle supporting plate 21 rotates up and down within a range of plus or minus 3 degrees around the X axis, the dresser pressure angle adjusting supporting plate 21 is adjusted through the first adjusting screw rods 29-1 on two sides of the dresser pressure angle supporting plate 21, guided by the arc-shaped guide groove, deflects around the X axis on the mounting surface of the second supporting plate 19 within plus or minus 3 degrees and is clamped and fixed by the first clamping screw rods 28-1.
The lower end bottom of the dresser pressure angle adjusting supporting plate 21 is longitudinally provided with a pin hole, the upper end of the dresser mounting bracket 26 is provided with a second clamping screw 28-2, a second adjusting screw 29-2 and a pin shaft 30, and the pin shaft 30 is matched with the pin hole, so that the dresser pressure angle adjusting supporting plate 21 can be deflected and adjusted by the second adjusting screw 29-2 within plus or minus 5 degrees around a Z axis and is clamped and fixed by the second clamping screw 28-2.
Preferably, the dressing roller 24 has a V-shaped cross section. When the dressing roller 24 dresses the worm grinding wheel 12, the dressing roller 24 can move along the Y-axis direction through the first supporting plate 18 and can move up and down along the Z-axis direction through the second supporting plate 19, and the position of the dressing roller 24 is adjusted, so that the dressing roller 24 is abutted against the circumferential surface of the worm grinding wheel 12 to dress the worm grinding wheel 12; the pressure angle of the grinding wheel machining can be adjusted by adjusting the deflection of the supporting plate 21 around the X axis and the deflection around the Z axis through the pressure angle of the dresser, the axial section of the correcting roller 24 is designed according to the shape of the axial section (or the normal section) of the tooth groove of the worm grinding wheel 12, the spiral surfaces on two sides of the tooth groove of the worm grinding wheel 12 can be dressed at the same time, the spiral surfaces on two sides of the tooth groove of the worm grinding wheel 12 can also be dressed respectively, the correcting main shaft 23 can be adjusted by deflecting around the X axis, so that the pressure angle of the spiral surfaces on the tooth groove of the worm grinding wheel 12 on two sides can be adjusted, and the grinding machining size of the workpiece 6 by the worm grinding wheel 12 is more accurate.
Preferably, the mounting surface of the second supporting plate 19 is provided with an inclined surface with a thin upper part and a thick lower part, so that the dressing roller does not interfere with the tail seat of the workpiece when the grinding wheel grinds the workpiece when the grinding wheel dressing device is at the uppermost position, and enough space is obtained for processing the workpiece with the smallest diameter.
Further, in the utility model discloses in, the processing mechanism still includes the cooling device that cools off and lubricate the emery wheel, the cooling device includes, install the cooling nozzle moving mechanism 22 on the first layer board 18, the removal end of the cooling nozzle moving mechanism 22 is installed the cooling nozzle 25, the cooling nozzle 25 is linked together with the coolant liquid holding cavity through the pipeline; the outlet of the cooling nozzle 25 is located at the grinding position of the worm grinding wheel 12.
The cooling nozzle moving mechanism 22 is a linear moving mechanism driven by a gear and a rack along the X-axis direction. It should be noted that: when the servo motor works, an output shaft of the servo motor drives the gear to do rotary motion, and the output shaft is used as a driving gear to be meshed with a driven rack so as to drive the rack to do linear motion; the cooling nozzle 25 is connected with the front end of the rack, and when the rack moves, the cooling nozzle 25 is driven to move, so that the purpose of adjusting the position of the cooling nozzle 25 in the X-axis direction is achieved.
The utility model discloses a theory of operation: when the workpiece 6 is ground, clamping the workpiece 6 on the workpiece rotating workbench 4, and tightly pushing the workpiece 6 by using the center of the center 7 at the lower end of the tailstock 9 so as to ensure the processing stability of the workpiece 6; the worm grinding wheel 12 is moved to a grinding position along the X-axis direction through the grinding wheel upright post 14, the mounting angle of the axis of the worm grinding wheel 12 is adjusted through the rotation of the grinding carriage deflection bracket 16 and then locked, and the workpiece 6 is ground through the linkage operation of the grinding wheel upright post 14, the grinding carriage 11, the workpiece holder 3, the grinding wheel spindle 13 and the workpiece rotating workbench 4; when the grinding wheel is dressed, the first supporting plate 18 is translated to the dressing position of the worm grinding wheel 12, the grinding wheel upright 14 is fixed, and the grinding wheel spindle 13, the grinding carriage 11, the second supporting plate 19 and the dressing spindle 23 are operated in a linkage manner to dress the worm grinding wheel 12.
It should be apparent to those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and therefore, the modifications and changes that can be made by those skilled in the art to some parts of the present invention still embody the principles of the present invention, and the objects of the present invention are achieved, all falling within the scope of the present invention.

Claims (10)

1. The numerical control worm grinding wheel gear grinding machine is characterized by comprising a base (1), wherein a rotatable workpiece clamping mechanism and a movable machining mechanism are arranged at the upper end of the base (1) in an aligned mode;
the workpiece clamping mechanism comprises a workpiece upright post (2) arranged on a base (1), a workpiece frame (3) capable of moving up and down is arranged on the inner side of the workpiece upright post (2), a workpiece rotating workbench (4) is arranged at the lower end of the workpiece frame (3), and a clamp (5) for installing a workpiece (6) is arranged on the upper surface of the workpiece rotating workbench (4); the upper end of the workpiece frame (3) is provided with a tailstock (9) capable of moving up and down, and the tailstock (9) is matched with the clamp (5) to clamp the workpiece (6) stably;
the machining mechanism comprises a grinding wheel upright post (14) movably mounted on a base (1), a rotatable grinding wheel carriage deflection bracket (16) is mounted on the inner side of the grinding wheel upright post (14), and a grinding wheel device for grinding a workpiece (6) and a grinding wheel finishing device for finishing a grinding wheel are mounted on the grinding wheel carriage deflection bracket (16).
2. The numerical control worm grinding wheel gear grinding machine according to claim 1, characterized in that the clamp (5) fixes the workpiece (6) by clamping a mandrel matched with the workpiece (6); the lower end of the tailstock (9) is provided with an ejector pin (7), and when the workpiece (6) is clamped stably, the ejector pin (7) tightly pushes the workpiece (6); the central axis of the clamp (5) coincides with the central axis of the thimble (7) at the lower end of the tailstock (9).
3. The numerical control worm grinding wheel gear grinding machine according to claim 1, characterized in that one side of the tailstock (9) is connected with a first linear driving device arranged at the upper end of the workpiece frame (3) through a tailstock supporting plate (8); the workpiece rotating workbench (4) is driven by a direct-drive servo motor; the workpiece frame (3) is arranged on the workpiece upright post (2) through a second linear driving device; the second linear driving device is a servo oil cylinder, and a piston rod of the servo oil cylinder is connected with the workpiece frame (3).
4. The numerical control worm grinding wheel gear grinding machine according to claim 1, characterized in that the grinding wheel column (14) is mounted on the base (1) by means of a third linear movement device; the grinding carriage deflection bracket (16) is mounted on the grinding wheel upright post (14) through a needle bearing, and the grinding carriage deflection bracket (16) is driven through gear transmission.
5. The numerical control worm grinding wheel gear grinding machine according to claim 1, characterized in that the grinding wheel device comprises a grinding carriage (11) which is mounted on a grinding carriage deflection bracket (16) and can move along the Y-axis direction, a grinding wheel spindle (13) is mounted in the grinding carriage (11) along the Y-axis direction, a worm grinding wheel (12) is mounted at one end of the grinding wheel spindle (13), and the worm grinding wheel (12) grinds the workpiece (6).
6. The numerically controlled worm grinding wheel gear grinding machine according to claim 5, characterized in that the grinding carriage (11) is mounted on the lower portion of the carriage deflection bracket (16) by a fourth linear motion device, horizontally movable in the Y-axis direction; the fourth linear motion device comprises a servo motor of the grinding carriage (11), a roller linear rail arranged on the grinding carriage deflection bracket (16) and a ball screw pair used for driving the grinding carriage (11) to move linearly, wherein the power output end of the servo motor of the grinding carriage (11) is connected with a screw shaft of the ball screw pair, a nut of the ball screw pair is connected with the grinding carriage (11), and the grinding carriage (11) is further connected with a sliding block of the roller linear rail.
7. The numerical control worm grinding wheel gear grinding machine according to claim 1, characterized in that the grinding wheel dressing device comprises a grinding wheel dressing device base (17) mounted on a grinding carriage deflection bracket (16), a first supporting plate (18) moving along the Y-axis direction is mounted on the grinding wheel dressing device base (17), a second supporting plate (19) moving up and down along the Z-axis direction is mounted on the first supporting plate (18), a dressing spindle (23) is mounted on the second supporting plate (19), the central axis of the dressing spindle (23) is parallel to the central axis of the grinding wheel spindle (13), and a dressing roller (24) is sleeved on the dressing spindle (23).
8. The numerical control worm grinding wheel gear grinding machine according to claim 7, characterized in that the dressing spindle (23) is a direct drive spindle, and the first supporting plate (18) is mounted on the grinding wheel dressing device base (17) through a fifth linear motion device; the second supporting plate (19) is arranged on the first supporting plate (18) through a sixth linear motion device.
9. The numerical control worm grinding wheel gear grinding machine according to claim 7, characterized in that the dressing main shaft (23) is mounted on the second supporting plate (19) through a dresser pressure angle supporting plate (21) with an adjustable angle, the dresser pressure angle supporting plate (21) can be adjusted in a left-right rotation manner within a range of plus or minus 5 degrees around the Z axis, and the dresser pressure angle supporting plate (21) can be adjusted in a top-down rotation manner within a range of plus or minus 3 degrees around the X axis; the dresser pressure angle supporting plate (21) is connected with a dressing main shaft (23) through a dresser mounting bracket (26), and the dressing main shaft (23) is mounted in the dresser mounting bracket (26).
10. The numerical control worm grinding wheel gear grinding machine according to claim 1, characterized in that the machining mechanism further comprises a cooling device for cooling and lubricating the grinding wheel, the cooling device comprises a cooling nozzle moving mechanism (22), a cooling nozzle (25) is installed at the moving end of the cooling nozzle moving mechanism (22), and the cooling nozzle (25) is communicated with the cooling liquid accommodating cavity through a pipeline; the liquid outlet of the cooling nozzle (25) is positioned at the grinding position of the worm grinding wheel (12).
CN202120201175.4U 2021-01-25 2021-01-25 Numerical control worm grinding wheel gear grinding machine Active CN214517990U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114226868A (en) * 2021-12-28 2022-03-25 湖南中大创远数控装备有限公司 Forming grinding wheel gear grinding machine tool
CN114472990A (en) * 2022-02-21 2022-05-13 大连德迈仕精密科技股份有限公司 Shaft surface cutting equipment
CN114850584A (en) * 2022-06-21 2022-08-05 湖南中大创远数控装备有限公司 Worm wheel gear grinding machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114226868A (en) * 2021-12-28 2022-03-25 湖南中大创远数控装备有限公司 Forming grinding wheel gear grinding machine tool
CN114472990A (en) * 2022-02-21 2022-05-13 大连德迈仕精密科技股份有限公司 Shaft surface cutting equipment
CN114472990B (en) * 2022-02-21 2023-12-01 大连德迈仕精密科技股份有限公司 Shaft surface cutting equipment
CN114850584A (en) * 2022-06-21 2022-08-05 湖南中大创远数控装备有限公司 Worm wheel gear grinding machine
CN114850584B (en) * 2022-06-21 2024-03-12 湖南中大创远数控装备有限公司 Worm grinding wheel gear grinding machine

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