CN110497041B - Workpiece clamping assembly in gear hobbing machine - Google Patents

Abstract

The workpiece clamping assembly comprises a main clamping seat and an auxiliary clamping seat which are oppositely arranged, the main clamping seat comprises a main clamping seat motor and a main clamping seat main body, a main rotating shaft rotating along with a motor shaft is arranged in the main clamping seat main body, and a clamping piece for clamping a workpiece is arranged at the outer end of the main rotating shaft; the auxiliary clamping seat comprises an auxiliary clamping seat motor and an auxiliary clamping seat main body, an auxiliary rotating shaft rotating along with a motor shaft is arranged in the auxiliary clamping seat main body, and the outer end of the auxiliary rotating shaft is provided with a supporting piece used for supporting a workpiece. The workpiece clamping assembly provided by the invention has the advantages that the workpiece is firmly clamped in the machining process, the equipment stability is high, and the machining precision is high; the workpiece clamping assembly adopts an independent double-rotation structure, the clamping stability is high during processing, and meanwhile, the chuck locking device in the main clamping seat is novel in structure, integrated on the main rotating shaft, small in size, good in coaxiality and high in control precision.

Description

Workpiece clamping assembly in gear hobbing machine

Technical Field

The invention belongs to the technical field of gear hobbing machine equipment, and particularly relates to a workpiece clamping assembly in a gear hobbing machine.

Background

The hobbing machine is a machine tool used in the process of machining workpieces and gears, and can be used for machining straight teeth, helical teeth and cylindrical gears, worm gears, chain wheels and the like; the gear hobbing machine is widely applied to various machine manufacturing industries such as automobiles, tractors, machine tools, engineering machinery, mining machinery, metallurgical machinery, petroleum, instruments, aircraft spacecrafts and the like.

In the prior art, the gear hobbing machine is widely applied in the field of hardware processing, and has various functions and structures. For example, chinese utility model patent publication No. CN209256016U discloses a gear hobbing machine, which includes a frame, a driving mechanism arranged on the frame, a clamping mechanism for clamping a workpiece, and a hobbing cutter mechanism arranged on the driving mechanism, and controls the horizontal sliding, rotation and locking of the cutter to regulate and control the best processing position, and is assisted by the online cleaning cutter of the brush unit, and the processing quality of the workpiece can be improved while taking into account the high efficiency. For another example, in the chinese utility model patent with publication No. CN205798610U, a high-speed gear hobbing machine is disclosed, including motor, servo motor, layering, carousel bottom plate, planetary reducer and gear hobbing machine base, stability is good, and the rigidity is high, is equipped with shaft coupling and gear hobbing machine lead screw, and the shaft coupling drives the rotation of gear hobbing machine lead screw to drive the layering back and forth movement on the guide rail, the noise is low, easily operation and control. For another example, in the chinese utility model patent with publication number CN207171117U, a gear hobbing machine is disclosed, which comprises a gear hobbing machine body, and further comprises: the first power head is detachably connected with the output end of the gear hobbing machine body, the output end of the gear hobbing machine body can drive the first power head to act, and the first power head can process external teeth by acting; the output end of the gear hobbing machine body can drive the transmission body to operate so as to enable the output end of the transmission body to act; and the second power head can be fixedly connected with the output end of the transmission body and can process internal teeth. The structural design of the gear hobbing machine can effectively solve the problem that the existing equipment can only process internal teeth or external teeth.

As can be seen from the above, the work holding device in the gear hobbing machine is an important structure, and is closely related to smooth gear hobbing operation and improvement of machining accuracy. The present application is therefore directed to work holding assemblies.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the workpiece clamping assembly in the gear hobbing machine, which has the advantages of firm clamping of the workpiece in the machining process, high equipment stability and high machining precision.

In order to solve the above technical problems, the present invention is solved by the following technical solutions.

The workpiece clamping assembly comprises a main clamping seat and an auxiliary clamping seat which are oppositely arranged, the main clamping seat comprises a main clamping seat motor and a main clamping seat main body, a main rotating shaft rotating along with a motor shaft is arranged in the main clamping seat main body, and a clamping piece for clamping a workpiece is arranged at the outer end of the main rotating shaft; the auxiliary clamping seat comprises an auxiliary clamping seat motor and an auxiliary clamping seat main body, an auxiliary rotating shaft rotating along with a motor shaft is arranged in the auxiliary clamping seat main body, and the outer end of the auxiliary rotating shaft is provided with a supporting piece used for supporting a workpiece. In the structure, the main clamping seat clamps one end of a workpiece through the clamping piece on the main clamping seat, and the auxiliary clamping seat abuts against the other end of the workpiece to stably clamp the workpiece. Simultaneously in this application, main pivot and auxiliary rotating shaft all have independent motor control to rotate, and two motors rotate in step when the work piece is processed, guarantee that the work piece rotates stable high accuracy. In many gear hobbing machines among the prior art, main pivot rotates and vice pivot does not initiatively rotate, only follows up, takes place the phenomenon of blocking easily, easily causes the work piece processing failure, eliminates this problem in this application.

In a preferred embodiment, in the main chuck seat, the clamping member includes a chuck seat disposed at an outer end of the main spindle and a chuck disposed on the chuck seat, the chuck is connected to a chuck locking device, and the chuck locking device enables the chuck to extend and contract, so as to clamp and loosen the chuck. In the structure, the chuck is preferably a jaw chuck, when the chuck moves towards the inside of the main rotating shaft, the chuck is clamped, and when the chuck moves towards the outside of the main rotating shaft, the chuck is loosened, so that the chuck can be used for loading and unloading.

In a preferred embodiment, in the main holder, the chuck locking device comprises a traction piece connected with the end of the chuck, and the traction piece is arranged in a hollow cavity of the main rotating shaft; an oil cavity is formed in the main clamping seat body, the main rotating shaft penetrates through the oil cavity, a piston is arranged in the oil cavity, and the piston can reciprocate in the oil cavity under the action of hydraulic oil; the piston moves to drive the traction piece to move. In the traditional gear hobbing machine, a chuck locking device is generally an external device, and has the disadvantages of complex structure, large volume, complicated transmission and easy failure. In this application, with chuck locking device integrated to main pivot in, small, the integrated level is high, and coaxial with main pivot, and the transmission makes things convenient for the precision high. And two oil ports are arranged on the outer wall of the oil cavity and are connected with a hydraulic oil system for supplying oil. The oil supply in the two oil ports respectively corresponds to the reciprocating movement of the piston: one oil port supplies oil, the other oil port discharges oil, the piston can move to one side, and the traction piece drives the chuck to move at the moment, so that the chuck is locked; after the oil ports for supplying and discharging oil are exchanged, the piston can move towards the other side, the chuck is driven to move reversely by the traction piece, the chuck is loosened, and the operation is convenient.

In a preferred embodiment, in the main clamping seat, one end of the traction piece is connected to the traction seat, the traction seat is provided with a traction column extending out of the main rotating shaft, and the length of a rotating shaft side hole extending out of the traction column on the main rotating shaft is greater than or equal to the reciprocating movement distance of the piston, so that the movement of the piston is not limited; the outer end of the traction column is fixed on the traction column mounting seat; the piston is sleeved on the main rotating shaft, an assembly cavity is formed in one side, facing the main rotating shaft, of the piston, and the traction column mounting seat is arranged in the assembly cavity. In the structure, the assembly is compact, the transmission is flexible, and the piston can drive the traction column mounting seat to move synchronously when moving leftwards and rightwards, so that the traction column, the traction seat and the traction piece are driven to move together.

In a preferred embodiment, in the main clamping seat, the traction piece, the traction seat, the chuck, the traction column and the traction column mounting seat all rotate synchronously along with the main rotating shaft, and a piston bearing is arranged between the traction column mounting seat and the side wall of the assembly cavity, so that the lubricating performance is good.

In a preferred embodiment, in the auxiliary clamping seat, the abutting piece comprises an abutting piece mounting seat arranged at the outer end of the auxiliary rotating shaft and an abutting rod arranged in the abutting piece mounting seat, and the outer end of the abutting rod extends out of the end part for abutting against the workpiece; and a supporting piece spring is arranged in the supporting piece mounting seat, one end of the supporting piece spring is abutted against the end part of the supporting rod, the other end of the supporting piece spring is abutted against a supporting piece nut, and the supporting piece nut can rotate to adjust the distance. In the structure, the abutting rod is limited and arranged in the abutting piece mounting seat and is not easy to separate, relative movement at a certain distance can be carried out, and the distance can be finely adjusted by rotating the abutting piece nut, so that the compressible quantity of the abutting piece spring is adjusted, and the pressure of the abutting rod on a workpiece is adjusted.

Compared with the prior art, the invention has the following beneficial effects: the workpiece clamping assembly in the gear hobbing machine is provided, the workpiece is firmly clamped in the machining process, the equipment stability is high, and the machining precision is high; the workpiece clamping assembly adopts an independent double-rotation structure, the clamping stability is high during processing, and meanwhile, the chuck locking device in the main clamping seat is novel in structure, integrated on the main rotating shaft, small in size, good in coaxiality and high in control precision.

Drawings

Fig. 1 is a front view of a gear hobbing machine system in the present application.

Fig. 2 is a first perspective view of the gear hobbing machine system of the present application.

Fig. 3 is a second perspective view of the gear hobbing machine system of the present application.

Fig. 4 is a cross-sectional state view of the gear hobbing machine system in the present application.

Fig. 5 is a schematic cross-sectional view of a portion of the primary cartridge, a portion of the secondary cartridge, and a bit structure in the gear hobbing machine system of the present application.

Fig. 6 is a schematic cross-sectional view of a portion of a primary cartridge in the gear hobbing machine system of the present application.

Fig. 7 is a schematic cross-sectional view of a portion of a secondary cartridge in the gear hobbing machine system of the present application.

Fig. 8 is a perspective view of a main cartridge in the gear hobbing machine system of the present application.

Fig. 9 is a perspective view of a main cartridge with a housing omitted in the gear hobbing machine system of the present application.

Fig. 10 is a perspective view of a sub cartridge in the gear hobbing machine system of the present application.

Fig. 11 is a perspective view of a sub cartridge with a housing omitted in the gear hobbing machine system of the present application.

Fig. 12 is a perspective view of a partial structure of a moving bed assembly in the gear hobbing machine system of the present application.

Figure 13 is a first perspective view of a bit drive socket in the gear hobbing system of the present application.

Fig. 14 is a second perspective view of a bit drive socket in the gear hobbing machine system of the present application.

Fig. 15 is a perspective view of a bit drive housing with a housing omitted in the gear hobbing machine system of the present application.

Figure 16 is a cross-sectional view one of the bit drive sockets in the gear hobbing system of the present application.

Figure 17 is a second cross-sectional view of the bit drive socket in the gear hobbing system of the present application.

Fig. 18 is a perspective view of a bit lifter in the gear hobbing system of the present application.

Fig. 19 is a side view of a bit lifter in the gear hobbing system of the present application.

Fig. 20 is a perspective view of a lifter plate in the gear hobbing system of the present application.

Fig. 21 is a perspective view of a bit, a bit holder, and a bit base in the gear hobbing machine system of the present application.

Fig. 22 is a bottom view of the bit, bit holder, and bit base in the gear hobbing system of the present application.

FIG. 23 is a top view of the feeder system and a portion of the dolly assembly of the present application.

FIG. 24 is a first perspective view of the feeder system and a portion of the dolly assembly of the present application.

Fig. 25 is a second perspective view of the feeder system and a portion of the dolly assembly of the present application.

Fig. 26 is a front view of the feed system of the present application.

Fig. 27 is a first perspective view of a feed system of the present application.

Fig. 28 is a second perspective view of the feed system of the present application.

Fig. 29 is an enlarged view of the region a in fig. 27.

Fig. 30 is an enlarged view of a region B in fig. 28.

Fig. 31 is an enlarged view of the region C in fig. 28.

Fig. 32 is a perspective view of a loading tray in the feeding system of the present application.

Fig. 33 is a perspective view of a feed block in the feed system of the present application.

Fig. 34 is a perspective view of a workpiece drop frame in the feeding system of the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiments described below by referring to the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, are exemplary only for explaining the present invention, and are not construed as limiting the present invention.

In describing the present invention, it is to be understood that the terms: the terms center, longitudinal, lateral, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, and thus, should not be construed as limiting the present invention. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In describing the present invention, unless otherwise expressly specified or limited, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.

Referring to fig. 1-34, an automatic gear hobbing machine with an automatic feed system in the present application includes a gear hobbing machine system including a moving bed assembly, a work holding assembly, a cutter head assembly, and a feed system; the feeding system comprises a feeding assembly, a conveying assembly and a feeding and discharging assembly; the specific structure is as follows.

The movable seat assembly 4 comprises a clamping assembly base 45 and a cutter head assembly base 46, and sliding rail systems are arranged on the clamping assembly base 45 and the cutter head assembly base 46; the workpiece clamping assembly is arranged on the clamping assembly base 45 and moves through a screw rod device; the cutter head assembly is mounted on the cutter head assembly base 46 and is moved by a lead screw device. In this structure, remove seat subassembly 4 and provide fine continuation to work piece centre gripping subassembly and tool bit subassembly on it, stability is good, and the during operation can not shake or rock. Meanwhile, the sliding rail system is matched with the screw rod device, so that the workpiece clamping assembly and the tool bit assembly can be moved smoothly and stably, the controllability is high, and the product machining precision is high.

Specifically, in the removal seat subassembly 4 of this application, the slide rail system is including locating slide rail installation position 431 on centre gripping subassembly base 45 and the tool bit subassembly base 46, be equipped with on the slide rail installation position 431 and remove a slide rail 43, centre gripping subassembly base 45 and tool bit subassembly base 46's bottom is passed through the mobilizable seat slide rail 43 that arranges in of slide rail on, overall structure convenient assembling, and precision and directionality are strong when removing, guarantee work piece machining precision. The screw device comprises a clamping component screw and a driving motor which are arranged in a clamping component base 45; the workpiece clamping device further comprises a cutter head component lead screw and a cutter head component lead screw driving motor 47 which are arranged in the cutter head component base 46, and the lead screw device enables the workpiece clamping component and the cutter head component to be high in moving precision. The clamping assembly lead screw comprises a main clamping seat lead screw 411 and an auxiliary clamping seat lead screw 421; the main holder screw 411 is driven by a main holder screw motor 41, and the main holder body 12 is assembled on the main holder screw 411 through a main thread sleeve 412 to realize transmission; the auxiliary clamping seat screw 421 is driven by an auxiliary clamping seat screw motor 42, and the auxiliary clamping seat main body 22 is assembled on the auxiliary clamping seat screw 421 through an auxiliary threaded sleeve 422 to realize work transfer. In this structure, main holder 1 and vice holder 2 are controlled by independent screw device and lead screw motor respectively, can independently remove, and the creativity is strong, and the position control flexibility ratio is high.

The workpiece clamping assembly comprises a main clamping seat 1 and an auxiliary clamping seat 2 which are oppositely arranged, wherein the main clamping seat 1 comprises a main clamping seat motor 11 and a main clamping seat body 12, a main rotating shaft 15 which rotates along with a shaft part 16 of the main clamping seat motor 11 is arranged in the main clamping seat body 12, and a clamping piece for clamping a workpiece is arranged at the outer end of the main rotating shaft 15; the auxiliary clamping seat 2 comprises an auxiliary clamping seat motor 21 and an auxiliary clamping seat main body 22, an auxiliary rotating shaft 25 rotating along with a motor shaft is arranged in the auxiliary clamping seat main body 22, a supporting piece used for supporting a workpiece is arranged at the outer end of the auxiliary rotating shaft 25, the main clamping seat 1 is arranged on the first moving seat 13, and the auxiliary clamping seat 2 is arranged on the second moving piece 14. In the structure, the main clamping seat 1 clamps one end of a workpiece through a clamping piece on the main clamping seat, and the auxiliary clamping seat 2 abuts against the other end of the workpiece to stably clamp the workpiece. Meanwhile, in the application, the main rotating shaft 15 and the auxiliary rotating shaft 25 are controlled by independent motors to rotate, and when a workpiece is machined, the two motors synchronously rotate, so that the stability and the high precision of the rotation of the workpiece are ensured. In many gear hobbing machines among the prior art, main pivot rotates and vice pivot does not initiatively rotate, only follows up, takes place the phenomenon of blocking easily, easily causes the work piece processing failure, eliminates this problem in this application.

The main cartridge 1 and the sub cartridge 2 in the present application will be specifically seen below.

In the main holder 1, the clamping member includes a holder seat 152 disposed at the outer end of the main spindle 15 and a collet 151 disposed on the holder seat 152, the collet 151 is connected to a collet locking device, and the collet locking device enables the collet 151 to extend and retract, so as to clamp and loosen the collet 151. In this structure, the collet 151 is preferably a jaw type collet, and when the collet 151 moves toward the inside of the main shaft 15, the collet is clamped, and when the collet 151 moves toward the outside of the main shaft 15, the collet is loosened, and thus, the collet can be used for loading and unloading.

Specifically, the chuck locking device comprises a traction piece 17 connected with the end of the chuck 151, and the traction piece 17 is arranged in a hollow cavity of the main rotating shaft 15; an oil chamber 192 is formed in the main chuck main body 12, the main rotating shaft 15 penetrates through the oil chamber 192, a piston 19 is arranged in the oil chamber 192, and the piston 19 can reciprocate in the oil chamber 192 under the action of hydraulic oil; the piston 19 moves to move the pulling element 17. In the traditional gear hobbing machine, a chuck locking device is generally an external device, and has the disadvantages of complex structure, large volume, complicated transmission and easy failure. In this application, with chuck locking device integrated to main pivot 15 in, small, the integrated level is high, and coaxial with main pivot 15, and the transmission makes things convenient for the precision high. Two oil ports are formed in the outer wall of the oil cavity 192 and are connected with a hydraulic oil system for oil supply. The oil supply in the two ports corresponds to the reciprocating movement of the piston 19: one oil port supplies oil, the other oil port discharges oil, the piston 19 can move to one side, and the traction piece 17 drives the chuck 151 to move at the moment, so that the chuck is locked; after the oil ports for supplying and discharging oil are exchanged, the piston 19 can move to the other side, and the traction piece 17 drives the chuck 151 to move in the reverse direction, so that the chuck is loosened, and the operation is convenient.

Specifically, in the main holder 1, one end of the traction piece 17 is connected to the traction seat 18, the traction seat 18 is provided with a traction column 191 extending out of the main rotating shaft 15, and the length of a rotating shaft side hole 159, extending out of the traction column 191, on the main rotating shaft 15 is not less than the reciprocating movement distance of the piston 19, so that the piston movement is not limited; the outer end of the traction column 191 is fixed on the traction column mounting seat 194; the piston 19 is sleeved on the main rotating shaft 15, and an assembly cavity is arranged on one side of the piston 19 facing the main rotating shaft 15, and the traction column mounting seat 194 is arranged in the assembly cavity. In the structure, the assembly is compact, the transmission is flexible, and when the piston 19 moves left and right, the traction column mounting seat 194 can be driven to synchronously move, so that the traction column 191, the traction seat 18 and the traction piece 17 are driven to move together. The traction piece 17, the traction seat 18, the chuck 151, the traction column 191 and the traction column mounting seat 194 synchronously rotate along with the main rotating shaft 15, and a piston bearing 195 is arranged between the traction column mounting seat 194 and the side wall of the assembly cavity, so that the lubricating performance is good.

In the auxiliary clamping seat 2, the abutting part comprises an abutting part mounting seat 24 arranged at the outer end of the auxiliary rotating shaft 25 and an abutting rod 23 arranged in the abutting part mounting seat 24, and the outer end of the abutting rod 23 extends out to abut against the end part of the workpiece; a supporting member spring 231 is arranged in the supporting member mounting seat 24, one end of the supporting member spring 231 is abutted against the end of the supporting rod 23, the other end of the supporting member spring is abutted against a supporting member nut 232, and the supporting member nut 232 can rotate to adjust the distance. In this structure, the support rod 23 is limited in the support member mounting seat 24 and is not easy to be disengaged, for example, a limit groove, a limit step and the like are formed, and relative movement at a certain distance can be performed, and the distance can be finely adjusted by rotating the support member nut 232, so that the compressible amount of the support member spring 231 can be adjusted, and the pressure of the support rod 23 on the workpiece can be adjusted.

The cutter head assembly comprises a cutter head driving seat 5 and a cutter head lifting piece 3; the cutter head driving seat 5 comprises a cutter head driving main body 52, two sides of the cutter head driving main body 52 are provided with side wing parts 521 for mounting a sliding block and assembling on a sliding rail, a cutter head driving rotating shaft 54 is arranged in the cutter head driving main body 52, the cutter head driving rotating shaft 54 is in transmission fit with a cutter head driving motor 51, the cutter head driving motor 51 drives the cutter head driving rotating shaft 54 to rotate, and the outer side of the cutter head driving rotating shaft 54 is fixed with a cutter head lifting part 3 through a mounting disc 53; the tool bit lifting part 3 comprises a tool bit lifting main body 37, a lifting device is arranged on the tool bit lifting main body 37, the lifting device drives a tool bit pair to lift, the tool bit pair comprises a lifting plate 36, a tool bit control part is fixed on the lifting plate 36, and a tool bit 35 is arranged on the tool bit control part; a slide rail system is arranged between the lifting plate 36 and the cutter head lifting main body 37. In the structure, the cutter head driving seat 5 can move back and forth, the cutter head driving rotating shaft 54 can move back and forth, and the cutter head 35 in the cutter head lifting piece 3 can move up and down, so that the cutter head has a plurality of freedom degrees of movement in multiple directions, and the processing flexibility is high; and the sliding rail system ensures high precision during movement.

In the following, reference will be made in detail to the bit drive socket 5 and the bit lifter 3 in the present application.

Specifically, in the bit driver mount 5 of the present application, the bit driver body 52 is movably disposed on the bit assembly base 46, such as by a lead screw device; the rotating shaft of the cutter head driving motor 51 drives the transmission gear 512 to rotate, a rack 542 is arranged on the periphery of the cutter head driving rotating shaft 54, and the transmission gear 512 is in meshed transmission with the rack 542 to achieve the purpose of controlling the cutter head driving rotating shaft 54 to rotate. In addition, the cutter head driving body 52 is provided with a movable lock ring 551, and one side of the lock ring 551 can move to the other side after receiving oil pressure; the lock ring 551 moves to abut against the step surface 541 of the bit driving rotation shaft 54. In the structure, an oil filling hole 55 is arranged at one side of the locking ring 551, after oil is supplied, the oil pressure enables the locking ring to move and then abut against the step surface 541, the friction force is increased, the purpose of locking the cutter head to drive the rotating shaft 54 is achieved, slight deviation in the process of machining a workpiece is prevented, and the machining precision of the product is improved.

In the bit drive socket 5 of the present application, one end of the bit drive body 52 is used for assembling the bit lifter 3, the other end is provided with an end cap 57, and the inside of the end cap 57 is provided with a disc spring 545 and a thrust collar 546. In this configuration, the disc spring 545 and the thrust collar 546 provide pressure to keep the bit drive shaft 54 pressed to one side, biasing in the axial direction, and improving the precision of the product.

In the cutter head lifting part 3 of the application, the lifting device in the cutter head lifting main body 37 is a screw rod device, the lifting screw rod 381 in the screw rod device is driven by the lifting motor 38, the cutter head pair is fixed on the lifting screw sleeve 382 in the screw rod device, the control is convenient, and the lifting distance precision is high. The slide rail system in the tool bit lifting piece 3 comprises a lifting slide rail 371 arranged on the tool bit lifting main body 37 and a lifting slide block 361 arranged on the lifting plate 36, wherein the lifting slide block 361 and the lifting slide rail 371 are matched to slide, so that the precision and the directionality during lifting movement are ensured, and the controllability is high.

In addition, in the tool bit lifter 3 of this application, be equipped with oil feed mouth 366 on the lifting slide 361, oil feed mouth 366 communicates with each other with the oil pocket in lifting slide 361, is equipped with mobilizable dog in this oil pocket, behind the oil pocket oil feed the dog is supported and is increased frictional force on lift slide 371. In this structure, after the height of the lifting rail is required, the oil inlet 366 supplies oil to press the stop block on the lifting slide rail 371, so as to achieve the purpose of locking, prevent the eccentric movement and improve the processing precision of the product.

The utility model provides a tool bit control among tool bit lift 3 includes tool bit motor 31, tool bit control body 32's below is fixed with tool bit 35, tool bit seat 34 is located to the lower extreme of tool bit 35, on tool bit seat 34 was located to tool bit seat 34, tool bit seat 341 is preferred to be built-in the base that has the bearing, the rotation of cooperation in the course of working tool bit. Specifically, the tool bit base 341 is fixed on the lifting plate 36, a press block 342 with adjustable tightness is arranged on the tool bit base 341, the tool bit base 34 is pressed on the tool bit base 341 by the press block 342, and the press block 342 and the tool bit base 34 are in inclined contact. In the structure, after the press block 342 is loosened, the up-down distance of the tool bit seat 34 can be finely adjusted; the tool bit can be replaced after the press block 342 is detached; during operation, the pressing block 342 is assembled through screws and tightly presses the tool bit seat 34, so that vibration and deflection are prevented, and the product processing precision is improved.

The feeding assembly comprises a feeding frame body 66, wherein a feeding frame 63 and a discharging pushing piece 621 are arranged on the feeding frame body 66, and the discharging pushing piece 621 pushes workpieces in a discharging port of the feeding frame 63 to the conveying assembly one by one; the automation degree is high, the workpieces are pushed one by one and processed one by one, and the phenomenon of blocking and pausing cannot occur.

Specifically, in the feeding assembly, the feeding frame 63 includes a stacking area 631 and a blanking area 633, the stacking area 631 and the blanking area 633 are separated by a partition 632, and workpieces in the blanking area 633 fall one by one; the lower part of the feeding frame 63 is provided with a feeding cylinder 64, and when the telescopic shaft of the feeding cylinder 64 is ejected upwards, a workpiece is lifted from the stacking area 631 and falls into the blanking area 633. In this structure, the work piece of treating processing piles up at the windrow district 631 earlier, and a curb plate of windrow district 631 is the swash plate, and big end up can hold more work piece down. In order to prevent the workpieces from jamming one by one in the conveyor assembly, the workpieces are lifted one by one from the stacking area 631 and fall into the blanking area 633 and then into the conveyor assembly by the upward action of the feed cylinder 64. The discharging pushing piece 621 pushes the workpieces at the bottommost side in the blanking area 633 to the conveying component one by one; the discharging pushing piece 621 is fixed on the discharging cylinder 62. The automatic material discharging device can be matched with a photoelectric switch or automatically perform material discharging operation through a program, and the workpieces are pushed to the conveying assembly one by one.

A conveying assembly for moving the workpiece and/or for the workpiece to pass through. Specifically, the conveying assembly comprises a first conveying section 61 arranged between the feeding assembly and the feeding and discharging assembly and a second conveying section 71 arranged behind the feeding and discharging assembly, and the first conveying section 61 and the second conveying section 71 are respectively used for conveying workpieces to be processed and processed workpieces. In the application, the workpieces in the first conveying section 61 move forwards by the pushing force of the discharging pushing piece 621, and the cover plate covers the first conveying section 61, so that the workpieces cannot be stacked and tilted in the conveying process; the second conveying section 71 comprises a conveying belt and a conveying motor 79, and the conveying motor 79 drives the conveying belt to circularly convey.

The feeding and discharging assembly comprises a feeding assembly, a discharging assembly and a pushing assembly; the feeding assembly comprises a movable feeding bracket 751, a workpiece placing position 755 is arranged on the feeding bracket 751, and the workpiece on the workpiece placing position 755 is sent to a processing position when the feeding bracket 751 moves; the blanking assembly comprises a movable receiving hopper 761, and the receiving hopper 761 receives a processed workpiece when moving to the position below the processing position; the pushing member comprises a telescopic pushing rod 721, and the pushing rod 721 is used for pushing the workpiece in the receiving hopper 761 to the conveying assembly. In the structure, the feeding and discharging operation can be automatically completed, after a workpiece is machined, the discharging assembly starts to act firstly, the receiving hopper 761 moves to the lower side of a machining position, then the workpiece clamping assembly loosens the clamping of the workpiece, the workpiece drops into the receiving hopper 761, then the discharging assembly returns, the pushing rod 721 pushes the workpiece in the receiving hopper 761 to the conveying assembly, meanwhile, the feeding assembly starts to act, the feeding bracket 751 moves to send the workpiece on the workpiece placing position 755 to the machining position, the workpiece is fixed by the workpiece clamping assembly, and the hobbing operation is started to be performed alternately.

Specifically, in the present application, the feeding bracket 751 is disposed on the feeding plate 752, and the feeding plate 752 is pushed by the feeding cylinder 75, so that the automatic feeding operation can be realized through a photoelectric switch and program control. In the application, the feeding bracket 751 is rotatably arranged on the feeding plate 752, and a torsion spring is arranged between the feeding bracket 751 and the feeding plate 752, and the torsion spring is specifically arranged in a torsion spring mounting hole 754 on the feeding bracket 751. In this structure, the workpiece placement locations 755 are recessed structures in which the workpiece can be stably placed. After the workpiece on the workpiece placing position 755 is clamped by the workpiece clamping assembly, the feeding bracket 751 can rotate at a certain angle (overcoming the elasticity of the torsion spring) under the interference of the workpiece in the retraction process, so that the retraction of the feeding bracket 751 can be smoothly carried out and the clamping cannot be carried out. Meanwhile, the torsion spring is arranged to enable the feeding bracket 751 to be kept in a horizontal state in a normal state, so that the workpiece in the workpiece placing position 755 does not fall.

In this application, connect hopper 761 to promote by connecing material cylinder 76, connect hopper 761 to arrange the below of material loading bracket 751 in for catch the work piece that the processing is good. Specifically, the material pushing rod 721 is pushed by the material pushing cylinder 72, the material pushing rod 721 pushes the workpiece in the material receiving hopper 761 to the workpiece blanking frame 74, and the discharge hole of the workpiece blanking frame 74 is disposed above the conveying assembly. In the structure, automatic material pushing operation is realized through a photoelectric switch and program control. The workpiece blanking frame 74 comprises an inclined plate and a blanking cavity 741, and workpieces in the blanking cavity 741 fall one by one. In the structure, the inclined plate is beneficial to enlarging the material receiving area, so that the workpieces cannot fall off, and the workpieces in the blanking cavity 741 fall onto the second conveying section 71 one by one and are conveyed to an external workpiece storage basket.

The work flow of the automatic hobbing machine in the present application is described below.

(1) Feeding: the workpieces enter the stacking area 631 in the feeding frame 63, and then the telescopic shaft of the feeding cylinder 64 extends upward, so that one workpiece falls into the blanking area 633 beyond the partition 632. The workpiece 9 is located at the bottom of the blanking area 633 under the action of gravity, then the discharging cylinder 62 works to drive the discharging pushing piece 621 to move, and the pushing part 622 on the discharging pushing piece 621 pushes the workpiece 9 to move on the first conveying section 61 to convey one by one.

(2) Feeding: the foremost workpiece 9 on the first conveying section 61 is pushed into a workpiece placing position 755 on the feeding bracket 751, the feeding cylinder 75 drives the feeding bracket 751 to extend out, the workpiece 9 is brought into a machining position, the main clamping seat 1 and the auxiliary clamping seat 2 are close to each other, the workpiece 9 is clamped and positioned, then the feeding bracket 751 retracts, and the feeding operation can be automatically carried out under the control of a program in cooperation with the photoelectric switch 77.

(3) Processing: the main clamping seat 1 and the auxiliary clamping seat 2 clamp the workpiece, the main rotating shaft 15 and the auxiliary rotating shaft 25 synchronously rotate to drive the workpiece 9 to rotate, and meanwhile, the cutter head 35 performs gear hobbing operation on the workpiece 9. In the process, the main clamping seat 1 and the auxiliary clamping seat 2 can move under the drive of respective screw devices to adjust the position, and meanwhile, the tool bit 35 can also lift up and down, rotate and advance and retreat, so that the gear hobbing operation is ensured to be carried out smoothly.

(4) Blanking: after the workpiece 9 is machined, the material receiving cylinder 76 works to push the material receiving hopper 761 to extend forwards, so that the material receiving hopper 761 is positioned below the workpiece 9, then the main clamping seat 1 and the auxiliary clamping seat 2 are loosened, the workpiece 9 falls onto the material receiving hopper 761, and then the material receiving hopper 761 returns.

(5) Discharging: after the receiving hopper 761 retracts, the pushing cylinder 72 pushes the pushing rod 721 to extend, so as to push the workpiece 9 in the receiving hopper 761 to the workpiece blanking frame 74, and the workpiece in the blanking cavity 741 drops onto the second conveying section 71 one by one and is conveyed to an external workpiece receiving basket.

In this application, automatic gear hobbing machine can set up on the workstation, and the structure such as motor, cylinder that wherein involve sets up on corresponding frame, and the assembly is stable. The electric connection mode, the on-off control mode of electric appliance units such as motor, cylinder in this application are prior art, can realize automated control.

The automatic gear hobbing machine with the automatic feeding system has the advantages that workpieces can be automatically conveyed and automatically fed and discharged, the workpieces are firmly clamped in the machining process, the equipment stability is high, and the machining precision is high; the workpiece clamping assembly adopts an independent double-rotation structure, the clamping stability is high during processing, and meanwhile, the chuck locking device in the main clamping seat is novel in structure, integrated on the main rotating shaft, small in size, good in coaxiality and high in control precision. In addition, in this application, each motion structure's among the tool bit subassembly locking function is good, and the locking is firm, guarantees that the precision of product processing is high.

The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.

Claims (1)

1. Work piece centre gripping subassembly in gear hobbing machine, its characterized in that: the workpiece clamping assembly comprises a main clamping seat (1) and an auxiliary clamping seat (2) which are oppositely arranged, the main clamping seat (1) comprises a main clamping seat motor (11) and a main clamping seat main body (12), a main rotating shaft (15) rotating along with a motor shaft is arranged in the main clamping seat main body (12), and a clamping piece for clamping a workpiece is arranged at the outer end of the main rotating shaft (15); the auxiliary clamping seat (2) comprises an auxiliary clamping seat motor (21) and an auxiliary clamping seat main body (22), an auxiliary rotating shaft (25) rotating along with a motor shaft is arranged in the auxiliary clamping seat main body (22), and a propping piece for propping a workpiece is arranged at the outer end of the auxiliary rotating shaft (25); in the main clamping seat (1), the clamping piece comprises a clamping head seat (152) arranged at the outer end of the main rotating shaft (15) and a clamping head (151) arranged on the clamping head seat (152), the clamping head (151) is connected with a clamping head locking device, and the clamping head locking device enables the clamping head (151) to stretch and retract so as to clamp and loosen the clamping head (151); in the auxiliary clamping seat (2), the abutting piece comprises an abutting piece mounting seat (24) arranged at the outer end of the auxiliary rotating shaft (25) and an abutting rod (23) arranged in the abutting piece mounting seat (24), and the outer end of the abutting rod (23) extends out of the end part for abutting against a workpiece; a supporting piece spring (231) is arranged in the supporting piece mounting seat (24), one end of the supporting piece spring (231) is abutted against the end part of the supporting rod (23), the other end of the supporting piece spring is abutted against a supporting piece nut (232), and the supporting piece nut (232) can rotate to adjust the distance;

in the main clamping seat (1), the chuck locking device comprises a traction piece (17) connected with the end part of a chuck (151), and the traction piece (17) is arranged in a hollow cavity of a main rotating shaft (15); an oil cavity (192) is formed in the main holder main body (12), the main rotating shaft (15) penetrates through the oil cavity (192), a piston (19) is arranged in the oil cavity (192), and the piston (19) can reciprocate in the oil cavity (192) under the action of hydraulic oil; when the piston (19) moves, the traction piece (17) is driven to move;

in the main clamping seat (1), one end of the traction piece (17) is connected to a traction seat (18), a traction column (191) extending out of the main rotating shaft (15) is arranged on the traction seat (18), and the length of a rotating shaft side hole (159) in the main rotating shaft (15) for the traction column (191) to extend out is larger than or equal to the reciprocating movement distance of the piston (19); the outer end of the traction column (191) is fixed on the traction column mounting seat (194); the piston (19) is sleeved on the main rotating shaft (15), an assembly cavity is formed in one side, facing the main rotating shaft (15), of the piston (19), and the traction column mounting seat (194) is arranged in the assembly cavity;

in the main clamping seat (1), the traction piece (17), the traction seat (18), the chuck (151), the traction column (191) and the traction column mounting seat (194) synchronously rotate along with the main rotating shaft (15), and a piston bearing (195) is arranged between the traction column mounting seat (194) and the side wall of the assembly cavity;

the main clamping seat (1) and the auxiliary clamping seat (2) are arranged on the moving seat assembly (4), the moving seat assembly (4) comprises a clamping assembly base (45), and a sliding rail system is arranged on the clamping assembly base (45);

the workpiece clamping assembly is arranged on a clamping assembly base (45) and moves through a lead screw device;

the sliding rail system comprises a sliding rail mounting position (431) arranged on a clamping assembly base (45), a moving seat sliding rail (43) is arranged on the sliding rail mounting position (431), and the bottom of the clamping assembly base (45) is movably arranged on the moving seat sliding rail (43) through the sliding rail;

the screw device comprises a clamping component screw and a driving motor which are arranged in a clamping component base (45); the clamping assembly lead screw comprises a main clamping seat lead screw (411) and an auxiliary clamping seat lead screw (421); the main clamping seat lead screw (411) is driven by a main clamping seat lead screw motor (41), and a main clamping seat main body (12) is assembled on the main clamping seat lead screw (411) through a main threaded sleeve (412) to realize transmission; the auxiliary clamping seat lead screw (421) is driven by an auxiliary clamping seat lead screw motor (42), and the auxiliary clamping seat main body (22) is assembled on the auxiliary clamping seat lead screw (421) through an auxiliary threaded sleeve (422) to realize power transmission.

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