CN115592210A

CN115592210A - Machining process for precise insection of pinion shaft

Info

Publication number: CN115592210A
Application number: CN202211376016.3A
Authority: CN
Inventors: 汪文耀; 杜林飞
Original assignee: Ningbo Sanfeng Enterprise Machinery And Electronics Co ltd
Current assignee: Ningbo Sanfeng Enterprise Machinery And Electronics Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-01-13
Anticipated expiration: 2042-11-04
Also published as: CN115592210B

Abstract

The application discloses a machining process of precise tooth patterns of a pinion shaft, and relates to the field of gear shaft machining equipment.A positioning assembly is arranged in a spring chuck of a numerical control horizontal gear hobbing machine, the tail of the gear shaft is inserted into the spring chuck, the positioning assembly is inserted into an installation groove, and the spring chuck clamps the gear shaft; the tip of the numerical control gear hobbing machine is tightly propped against the head of the gear shaft to realize the fixation of the gear shaft; the hob cutter moves along the axis direction of the gear shaft, and rough machining of insections is carried out on the belly of the gear shaft; taking down the roughly processed gear shaft, and detecting whether the processed insections meet the requirements through a detection tool; preliminarily cleaning the gear shaft meeting the requirements; and the cleaned gear shaft is fed into the numerical control vertical gear hobbing machine through a feeding device and is installed on a spring chuck of the numerical control vertical gear hobbing machine, the positioning assembly is arranged in the spring chuck, and a product meeting the requirements is formed through finish machining. This application has the advantage that improves gear shaft machining precision.

Description

Machining process for precise insection of pinion shaft

Technical Field

The application relates to the technical field of gear shaft processing, in particular to a processing technology of precise insections of a pinion shaft.

Background

Gear shaft refers to a mechanical part that supports and rotates with a rotating part to transmit motion, torque, or bending moment. Typically in the form of a metal rod, each section may have a different diameter. The parts of the machine that rotate are mounted on the shaft. The gear shaft is generally machined by a gear hobbing machine. In order to improve the machining efficiency, the existing gear machining is mostly carried out by adopting a numerical control gear hobbing machine.

Present a batch of gear shafts need processing, refer to fig. 1 and fig. 2, be respectively for waiting the gear shaft of processing and the gear shaft that has processed, gear shaft 1 includes from a left side to the right side in proper order including head 2, belly 3 and afterbody 4, head 2,

belly

3 and 4 coaxial and integrated into one piece of afterbody, installation groove 5 has been seted up along its axial on the afterbody 4 deviates from the terminal surface of belly 3, installation groove 5 is waist type groove, the inner wall symmetry that waist type groove is the plane setting has seted up arc wall 6.

In the processing process, the gear shaft belly needs to be processed with the insections, the tail part is clamped through the spring chuck, and the tip is abutted against the head part of the gear shaft. The hob moves along the axial direction of the workpiece to perform gear hobbing operation on the belly of the gear shaft.

In the above-mentioned machining process, the inventor found that at least the following problem exists in the technology, and the progress of the machining is influenced by the influence of relevant factors such as the clamping stability of the spring chuck, the structure of the hob and the like in the gear hobbing process.

Disclosure of Invention

In order to improve the machining precision of gear shaft insection, the application provides a machining process of pinion shaft accurate insection.

The application provides a processing technology of pinion shaft precision insection adopts following technical scheme, includes following step:

s1, a positioning assembly is arranged in a spring chuck of the numerical control horizontal gear hobbing machine, the tail of a gear shaft is inserted into the spring chuck, the positioning assembly is inserted into an installation groove, and the spring chuck clamps the gear shaft;

s2, the tip of the numerical control gear hobbing machine moves towards the head part close to the gear shaft and abuts against the head part of the gear shaft, so that the gear shaft is fixed;

s3, moving the hob along the axis direction of the gear shaft, and roughly machining the insection on the belly of the gear shaft;

s4, taking down the roughly processed gear shaft, and detecting whether the processed insections meet the requirements through a detection tool;

s5, preliminarily cleaning the gear shaft meeting the requirements;

and S6, feeding the cleaned gear shaft into a numerical control vertical gear hobbing machine through a feeding device, installing the gear shaft on a spring chuck of the numerical control vertical gear hobbing machine, arranging the positioning assembly in the spring chuck, and forming a product meeting the requirements through finish machining.

By adopting the technical scheme, the product is firstly roughly processed on the numerical control horizontal hobbing machine, a large amount of scrap iron can be generated in the rough processing process, the scrap iron can be conveniently separated from the gear shaft by the numerical control horizontal hobbing machine, the roughly processed gear shaft is subjected to dust removal treatment after being detected by the detection tool, the gear shaft subjected to dust removal enters the numerical control vertical hobbing machine for finish machining, the numerical control vertical hobbing machine is convenient for clamping parts after rough processing, the efficiency of part processing is improved, and the processing precision of the parts is improved in the whole process.

Optionally, the locating component is including fixing the connecting seat on the digit control machine tool, the coaxial butt seat that is fixed with on the connecting seat, butt seat diameter is greater than the connecting seat, be fixed with the locating piece on the butt seat, the locating piece cross-section be with mounting groove complex waist type, the locating piece is to inlay on the lateral wall that the plane set up and is equipped with a plurality of balls, the ball butt is in the inside wall of gear shaft mounting groove.

Through adopting above-mentioned technical scheme, setting up of locating piece prevents that spring chuck and part from appearing skidding to influence the precision of processing, the setting of ball is convenient for the locating piece and inserts or break away from the mounting groove, and simultaneously, the ball butt is at the mounting groove inside wall, and the gear shaft location of being convenient for on the one hand, on the other hand prevents that the gear shaft from leading to machining error for the motion of locating piece.

Optionally, the checking fixture comprises a base and a top seat which are horizontally arranged and a supporting rod which is connected with the base and the top seat, a sliding hole which runs through the top seat is formed in the top seat, a sliding rod is arranged in the sliding hole in a sliding mode and can rotate in the sliding hole, a positioning core is fixed at the lower end of the sliding rod and is inserted into the mounting groove of the gear shaft, a positioning bearing which is coaxial with the sliding hole is embedded in the base, the head of the gear shaft is inserted into the positioning bearing, a lifting rod is fixed on the base and is parallel to the sliding rod, a lifting groove is formed in the lifting rod along the length direction, a lifting block is arranged in the lifting groove in a sliding mode, a detection rod which slides along the radial direction of the gear shaft is arranged on the lifting block in a sliding mode, a standard clamping groove is formed in the end portion of the detection rod, and the standard clamping groove is used for clamping the end face between two adjacent processed gear grains and judging whether the standard clamping groove is qualified or not.

Through adopting above-mentioned technical scheme, install the head of the gear shaft that the rough machining is good in the location bearing, make the location core insert in the mounting hole, make the measuring bar towards the direction motion near the gear shaft, see whether the tooth terminal surface between two insections can the joint to the standard draw-in groove in, work as the insection joint in the standard draw-in groove, and with standard draw-in groove both sides inner wall butt, can tentatively judge the part of rough machining and meet the requirements, then make the measuring bar along vertical direction upward sliding, at the in-process that slides, correspond insection block all the time in the joint inslot, then can judge this insection and meet the requirements, through carrying out the same operation to different insections, thereby judge whether the gear shaft of rough machining meets the requirements.

Optionally, material feeding unit is including the conveyer belt that is used for shifting the part, the positioning seat has been placed on the conveyer belt, be fixed with the locating lever of cross section and gear epaxial mounting groove adaptation on the positioning seat, the locating lever inserts and corresponds the epaxial mounting groove of gear in, material feeding unit still includes the mechanism of reloading of renewal part.

By adopting the technical scheme, the roughly processed gear shaft is conveyed to the side of the numerical control vertical gear hobbing machine by the conveying belt, the gear shaft to be processed is transferred into the numerical control vertical gear hobbing machine for finish processing through the material changing mechanism, and then the finish processed gear shaft is placed on the corresponding positioning seat, so that the efficiency of gear shaft feeding and discharging is improved.

Optionally, the reloading mechanism includes a vertical installation section of thick bamboo that sets up on the vertical gear hobbing machine of numerical control, it is connected with carousel and drive carousel pivoted rotation motor to rotate on the installation section of thick bamboo, be fixed with on the carousel along with carousel pivoted rotation piece, be provided with the anchor clamps that are used for pressing from both sides the part on rotating, be provided with the drive actuating cylinder that drives installation section of thick bamboo and move in vertical direction on the vertical gear hobbing machine of numerical control.

By adopting the technical scheme, the clamp clamps the part, and the rotating motor drives the turntable to rotate, so that the part is arranged on the spring chuck of the numerical control vertical gear hobbing machine, and the hobbing cutter can process the part conveniently.

It is optional, it includes the chassis of coaxial coupling on the carousel to rotate the piece, the coaxial connecting cylinder that is fixed with of terminal surface that the chassis deviates from the carousel, anchor clamps set up on the connecting cylinder, anchor clamps are two sets of and are the symmetry setting with the carousel axis, two sets of rotation grooves with inside intercommunication are seted up to the connecting cylinder lateral wall, and two sets of anchor clamps stretch out from corresponding rotation groove, and same group's anchor clamps are including rotating the axis of rotation of connecting in the connecting cylinder, and the axis of rotation is on a parallel with the carousel axis, be fixed with the supporting rod in the axis of rotation, two the centre gripping groove that is used for the centre gripping gear shaft is offered to the supporting rod tip, both ends are sealed about the connecting cylinder, axis of rotation run through connecting cylinder up end and be fixed with the driven gear of another axis of rotation on the same group of anchor clamps, and connecting cylinder up end rotates and is connected with two intermeshing's drive gear, two drive gear meshes with one of them driven gear on two sets of anchor clamps respectively, the connecting cylinder up end is fixed with and drives drive gear pivoted driving motor.

Through adopting above-mentioned technical scheme, driving motor drives one of them drive gear and rotates, and two drive gear meshes to drive corresponding driven gear respectively and rotate, driven gear is towards not equidirectional pivoted in-process, drives the supporting rod and rotates towards not equidirectional, thereby realizes the clamp of part and blowing.

Optionally, a through groove is coaxially formed in the turntable along the axial direction, four driving grooves communicated with the through groove are radially formed in the turntable, the four driving grooves are uniformly distributed along the circumferential direction of the turntable, a driving disc is rotatably connected to the mounting cylinder, a driving block penetrating through one of the driving grooves is fixed on the driving disc, the driving block and the driving disc are eccentrically arranged, and the rotating motor drives the driving disc to rotate and enables the driving block to drive the turntable to rotate by an angle of 90 degrees at each time.

Through adopting above-mentioned technical scheme, the driving-disc rotates, the setting that slides drives the carousel and rotates at the drive block of drive inslot, the driving-disc rotates the round, the carousel rotates 90, the part of pressing from both sides is got rotates 90 back, clean under the effect of air-blower, the driving-disc drives the carousel and continues to rotate 90, make the supporting rod under the effect of driving actuating cylinder, install the vertical gear hobbing machine of numerical control with the gear shaft on, realize the material loading, and simultaneously, another anchor clamps are used for snatching the gear shaft that processes, and put on the appointed positioning seat, realize the unloading.

Optionally, it is provided with the dog that is used for blockking the positioning seat along with the conveyer belt motion to slide on the support of conveyer belt, be fixed with driven rack on the dog, be provided with on the dog and promote the dog and block the positioning spring that the positioning seat moved forward, the last swivelling joint of numerical control vertical lathe has the stop gear with driven rack toothing, it is provided with the gag lever post that the level set up to slide on the installation section of thick bamboo, gag lever post one end is provided with spacing rack, spacing rack with stop gear toothing, be provided with on the carousel and make the gag lever post motion and make the dog and the mechanism of stepping down of positioning seat separation.

Through adopting above-mentioned technical scheme, move to the vertical lathe side of numerical control when the part, under the effect of dog, the positioning seat stops to move forward, and the anchor clamps of being convenient for are to snatching of part or are convenient for place the positioning seat with the part that is processed on.

Optionally, the abdicating mechanism comprises a cam fixed on the rotating shaft of the driving disc, the limiting rod is sleeved with a limiting spring which pulls the limiting rod and enables the limiting block to be always abutted against the side wall of the cam, and the abdicating component further comprises a limiting component which enables the limiting rack to move when the limiting rod rotates 180 degrees.

Through adopting above-mentioned technical scheme, the driving-disc drives the carousel and rotates, and the carousel rotates 90, and spacing rack keeps motionless, and the carousel is every to be changeed 180, and spacing rack drives spacing rack and slides once, takes away or puts the back on the corresponding positioning seat with the gear shaft that the clamping rod was processed from the positioning seat promptly, and the dog removes, makes the positioning seat that has the gear shaft along with the conveyer belt moves together.

Optionally, the gag lever post includes that the driven lever and the butt of being connected rotate in the actuating lever of cam with spacing rack, four grooves of stepping down have been seted up along its axial to the actuating lever tip, and four grooves of stepping down are along actuating lever circumference evenly distributed, the driven lever is four can insert the pole of stepping down the inslot, the driven lever lateral wall has a plurality of spacing lugs, spacing lug is along driven lever circumference evenly distributed, be fixed with a plurality of drive lugs on the carousel, drive lug is along circumference evenly distributed on the carousel, drive lug promotes spacing lug pivoted angle and is 90 and is used for controlling the alignment or the dislocation of pole and the groove of stepping down.

Through adopting the above technical scheme, the rolling disc drives the drive lug and rotates, every rotation is 90, make the pole of stepping down be located the inslot of stepping down or make the pole butt of stepping down in the tip of actuating lever, when the pole of stepping down is located the inslot of stepping down, the actuating lever can't promote the driven lever motion at the in-process that slides, spacing rack can't drive the stopper motion this moment, the dog blocks the positioning seat this moment, prevent the positioning seat motion, when the pole butt of stepping down at the actuating lever tip, the actuating lever slides in-process area and drives the pole of stepping down and slides, thereby make the driven lever drive spacing rack motion, and then drive the dog motion, accomplish promptly and snatch or put the part on the positioning seat after, dog and positioning seat separation, the positioning seat of being convenient for moves forward.

Drawings

Fig. 1 is a schematic view of the structure of a part to be machined.

Fig. 2 is a schematic view of the structure of the machined part.

Fig. 3 is a schematic structural view of the positioning assembly.

FIG. 4 is a schematic structural diagram of the gauge.

Fig. 5 is a schematic structural view of the feeding device.

Fig. 6 is a schematic view of a coupling structure of the turntable and the mounting cylinder.

Fig. 7 is a schematic view of the connection structure of the clip.

Fig. 8 is a schematic structural view of the abdicating mechanism.

Fig. 9 is a schematic view of the connection structure of the driving lug on the turntable.

Description of the reference numerals:

1. a gear shaft; 2. a head portion; 3. the abdomen; 4. a tail portion; 5. mounting grooves; 6. an arc-shaped slot; 7. a connecting seat; 8. a butting seat; 9. positioning blocks; 10. a ball bearing; 11. a top seat; 12. a base; 13. a support bar; 14. a sliding hole; 15. a slide bar; 16. a positioning core; 17. a lifting rod; 18. a lifting block; 19. a detection lever; 20. a standard card slot; 21. a conveyor belt; 22. positioning seats; 23. mounting the cylinder; 24. a turntable; 25. a chassis; 26. a connecting cylinder; 27. a rotating groove; 28. a rotating shaft; 29. a clamping rod; 30. a driven gear; 31. a drive gear; 32. a drive motor; 33. a through groove; 34. a drive slot; 35. a drive disc; 36. a drive block; 37. a stopper; 38. a driven rack; 39. a limit gear; 40. a limit rack; 43. a cam; 44. a limiting spring; 45. a drive rod; 46. a driven lever; 47. a yielding groove; 48. a position yielding rod; 49. a limiting bump; 50. a drive lug; 51. rotating the motor; 52. the cylinder is driven.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a processing technology of pinion shaft precision insection, including the following steps:

s1, a positioning assembly is arranged in a spring chuck of the numerical control horizontal gear hobbing machine, the tail part 4 of a gear shaft 1 is inserted into the spring chuck, the positioning part of the positioning assembly is inserted into an installation groove 5, and the spring chuck clamps the gear shaft 1, so that the gear shaft 1 is preliminarily fixed;

s2, the tip of the numerical control gear hobbing machine moves towards the head 2 close to the gear shaft 1 and abuts against the head 2 of the gear shaft 1, and the gear shaft 1 is fixed;

s3, moving a hob of the numerical control horizontal gear hobbing machine towards the direction close to the gear shaft 1 and moving the hob along the axis direction of the gear shaft 1, and roughly machining the gear patterns on the belly 3 of the gear shaft 1;

s4, closing the numerical control horizontal gear hobbing machine, taking down the roughly machined gear shaft 1, then installing the gear shaft 1 on a detection tool, and detecting whether the machined insections meet requirements through the detection tool;

s5, performing primary cleaning on the gear shaft 1 meeting the requirements through a blower;

s6, the cleaned gear shaft 1 is fed to the side of the numerical control vertical gear hobbing machine through a feeding device and is installed on a spring chuck of the numerical control vertical gear hobbing machine through the feeding device, the positioning assembly is arranged in the spring chuck, then the ejector pin is abutted against the head 2 of the gear shaft 1, and the gear shaft 1 is subjected to finish machining through a hob, so that a product meeting requirements is formed.

Referring to fig. 1, fig. 2 and fig. 3, locating component is including fixing connecting seat 7 on the digit control machine tool, coaxial fixation has butt seat 8 on connecting seat 7, the terminal surface that butt seat 8 deviates from connecting seat 7 is fixed with locating piece 9, butt seat 8 diameter is greater than connecting seat 7 diameter, locating piece 9 cross-section is with mounting groove 5 complex waist type, locating piece 9 inlays on the same lateral wall that the plane set up and is equipped with two balls 10, two balls 10 are located the both sides of mounting groove 5 interior arc groove 6 respectively and support tightly on the inner wall of mounting groove 5, the installation of the gear shaft 1 of being convenient for is with the location.

Referring to fig. 2 and 4, examine utensil and include base 12 and the footstock 11 that is on a parallel with base 12, base 12 and footstock 11 are the level setting, be fixed with a plurality of bracing pieces 13 of connecting footstock 11 on the base 12, set up the vertical hole 14 that slides that runs through footstock 11 on the footstock 11, the hole 14 that slides is the round hole, it is provided with slide bar 15 to slide in the hole 14, slide bar 15 is cylindric and slide bar 15 lateral wall butt in the 14 inside walls of hole that slides, slide bar 15 can be at the 14 internal rotations of hole that slides. The lower extreme of slide rod 15 is fixed with location core 16, and location core 16 cross section be with mounting groove 5 complex waist type, and location core 16 inserts in the mounting groove 5 of gear shaft 1, and the lateral wall butt of location core 16 is in the inside wall of mounting groove 5.

Referring to fig. 2 and 4, a positioning bearing coaxial with the sliding hole 14 is embedded in the base 12, the head 2 of the gear shaft 1 is inserted into the positioning bearing, a lifting rod 17 is fixed on the base 12, the lifting rod 17 is parallel to the sliding rod 15, a lifting groove is formed in the lifting rod 17 along the length direction, the lifting groove penetrates through the lifting rod 17 along the positioning bearing, a lifting block 18 is arranged in the lifting groove in a sliding manner, the side wall of the lifting block 18 abuts against the inner side wall of the lifting groove, a detection rod 19 horizontally penetrating through the lifting block 18 is arranged on the lifting block 18, the detection rod 19 extends in the radial direction of the positioning bearing and is arranged on the lifting block 18 in a sliding manner, a standard clamping groove 20 is formed in the end portion of the detection rod 19, the standard clamping groove 20 is used for clamping the tooth end face between two processed adjacent insections, and when the gear face of the processed insections can be clamped into the tooth grooves and attached to the inner walls of the two sides of the standard clamping groove 20, and the insections processed at the insections meet the requirements. The lifting block 18 can slide in the lifting groove, and if the same gear surface between the two insections can smoothly slide in the standard clamping groove 20, the rough-machined gear shaft 1 meets the quality inspection requirement.

Referring to fig. 5 to 8, the feeding device comprises a conveying belt 21 for transferring parts, positioning seats 22 are placed on the conveying belt 21, positioning rods with cross sections matched with the mounting grooves 5 on the gear shaft 1 are fixed on the positioning seats 22, and the positioning rods are inserted into the mounting grooves 5 on the corresponding gear shaft 1, so that the gear shaft 1 can be conveniently positioned. The feeding device also comprises a material changing mechanism for changing parts. The material changing mechanism comprises an installation cylinder 23 vertically arranged on the numerical control vertical gear hobbing machine, the upper end face of the installation cylinder 23 is coaxially and rotatably connected with a rotary table 24, and a rotating motor 51 for driving the rotary table 24 to rotate is fixed in the installation cylinder 23. A rotating part rotating along with the rotating disc 24 is fixed on the rotating disc 24, a clamp used for clamping parts is arranged on the rotating part, and a driving cylinder 52 which is connected with the mounting cylinder 23 and drives the mounting cylinder 23 to move in the vertical direction is fixed on the numerical control vertical gear hobbing machine.

Referring to fig. 5, 6 and 7, the rotating member includes a chassis 25 coaxially connected to the turntable 24, a connecting cylinder 26 is coaxially fixed on an end surface of the chassis 25 opposite to the turntable 24, two sets of clamps are disposed on the connecting cylinder 26 and symmetrically disposed on two sides of an axis of the turntable 24, and are respectively used for clamping a processed part and a part to be processed, two sets of rotating grooves 27 communicated with the inside are disposed on a side wall of the connecting cylinder 26, the two sets of clamps extend out of the connecting cylinder 26 from the corresponding rotating grooves 27 and are closed at two ends, the same set of clamps includes a rotating shaft 28 rotatably connected in the connecting cylinder 26, the rotating shaft 28 is parallel to the axis of the connecting cylinder 26, a clamping rod 29 is fixed on the rotating shaft 28, the clamping rods 29 extend out of the corresponding rotating grooves 27 and can rotate in the corresponding rotating grooves 27 along the horizontal direction, the clamping grooves used for clamping the gear shaft 1 are formed in the positions, close to the end portions, of the two clamping rods 29, the rotating shaft 28 penetrates through the upper end face of the connecting cylinder 26 and is coaxially fixed with the driven gear 30 at the upper end portion, the driven gear 30 is meshed with the driven gear 30 of the other rotating shaft 28 on the same group of clamps, the upper end face of the connecting cylinder 26 is rotatably connected with two mutually meshed driving gears 31, the two driving gears 31 are respectively meshed with one driven gear 30 on the two groups of clamps, the driving motor 32 drives the driving gears 31 to rotate, the driving gears 31 drive the driven gears 30 to rotate, the driven gears 30 drive the corresponding clamping rods 29 to rotate, and clamping or putting down of parts is achieved.

Referring to fig. 6 and 8, a through groove 33 penetrating through the turntable 24 is axially formed in the turntable 24, the through groove 33 is coaxial with the turntable 24, four driving grooves 34 communicated with the through groove 33 are radially formed in the turntable 24, the four driving grooves 34 are uniformly distributed along the circumferential direction of the turntable 24 and axially penetrate through the turntable 24 along the turntable 24, the four driving grooves 34 form a cross groove, a driving disc 35 is rotatably connected to the mounting cylinder 23, a driving block 36 penetrating through one of the driving grooves 34 is fixed on the driving disc 35, the driving block 36 and the driving disc 35 are eccentrically arranged, and in the rotation process of the driving disc 35, the driving block 36 alternately moves in the driving groove 34 and the through groove 33, so that the turntable 24 rotates, and the turntable 24 rotates 90 degrees when the driving disc 35 rotates for each circle.

Referring to fig. 8 and 9, a stopper 37 for stopping the positioning seat 22 from moving along with the conveyor belt 21 is slidably disposed on a support of the conveyor belt 21, a driven rack 38 is fixed on the stopper 37, a positioning spring which is connected with a numerical control vertical hobbing machine and pushes the stopper 37 to stop the positioning seat 22 from moving forward is disposed on the stopper 37, a limit gear 39 meshed with the driven rack 38 is rotatably connected on the numerical control vertical hobbing machine, a horizontally disposed limit rod is slidably disposed on the mounting tube 23, a limit rack 40 is disposed at one end of the limit rod, the limit rack 40 is meshed with the limit gear 39, when the limit rack 40 drives the limit gear 39 to rotate, the limit gear 39 drives the driven rack 38 to slide, so that the driven rack 38 drives the stopper 37 to move, so that the positioning seat 22 is separated from the stopper 37, and the conveyor belt 21 drives the positioning seat 22 to move forward.

Referring to fig. 8 and 9, the turntable 24 is provided with a yielding mechanism for moving the limiting rod and separating the stopper 37 from the positioning seat 22, the yielding mechanism includes a cam 43 fixed on the rotating shaft of the driving disc 35, and a limiting spring 44 for pulling the limiting rod and making the limiting block always abut against the side wall of the cam 43 is sleeved on the limiting rod.

Referring to fig. 8 and 9, the abdicating mechanism further comprises a limiting component which enables the limiting rack 40 to move when the limiting rod rotates 180 degrees. The gag lever post includes that the driven lever 46 of being connected rotates with spacing rack 40 and butt in the actuating lever 45 of cam 43 lateral wall, four groove 47 of stepping down have been seted up along its axial to the tip of driven lever 46 to actuating lever 45, four groove 47 of stepping down are along actuating lever 45 circumference evenly distributed, driven lever 46 is four pole 48 of stepping down that can insert the inslot 47 of stepping down, driven lever 46 lateral wall has four spacing lugs 49, four spacing lugs 49 are along driven lever 46 circumference evenly distributed, be fixed with four drive lugs 50 on the carousel 24, four drive lugs 50 are along circumference evenly distributed on carousel 24, when the part that anchor clamps will be processed is put on positioning seat 22, let the pole 48 and the groove 47 of stepping down be the dislocation set, let the pole 48 butt at actuating lever 45 tip.

The turntable 24 rotates 90 degrees, the driving rod 45 drives the position-giving rod 48 and the driven rod 46 to move, so that the limiting rack 40 is driven to move, the limiting rack 40 drives the limiting gear 39 to rotate, so that the driven rack 38 drives the stop block 37 to move, and the positioning seat 22 is separated from the stop block 37; after the rotation of 90 degrees, the driving lug 50 drives the limiting lug 49 to rotate 90 degrees, the abdicating rod 48 is aligned with the abdicating groove 47, under the action of the positioning spring, the abdicating rod 48 is arranged in the abdicating groove 47 in a sliding manner, at this time, the driving rod 45 cannot drive the abdicating rod 48 and the driven rod 46 to slide, in the process that the cam 43 continues to rotate, the abdicating rod 48 gradually separates from the abdicating groove 47 and is completely separated before the rotation of 90 degrees, when the abdicating rod 48 separates from the abdicating groove 47, the driving lug 50 drives the limiting lug 49 to rotate 90 degrees, the end of the abdicating rod 48 is arranged in a staggered manner with the abdicating groove 47, the cam 43 continues to rotate, the end of the abdicating rod 48 abuts against the end of the driving rod 45, when the rotary disc 24 rotates the next 90 degrees, the driving rod 45 pushes the abdicating rod 48 and the driven rod 46 to move, and drives the stopper 37 to move under the action of the limiting rack 40, the limiting gear 39 and the driven gear 30.

The implementation principle of the machining process of the precise insection of the pinion shaft in the embodiment of the application is as follows: install gear shaft 1 on the spring clamp of numerical control horizontal gear hobbing machine, make locating piece 9 insert in mounting groove 5, then top supports tightly at the head 2 of gear shaft 1, the hobbing cutter processes belly 3 of gear shaft 1, gear shaft 1 after the rough machining is installed on examining the utensil, judge whether the insection that processes can block in the standard draw-in groove 20 of test bar 19, and make test bar 19 slide along corresponding insection, judge whether the gear shaft 1 of rough machining meets the requirements, the gear shaft 1 that will meet the requirements.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A machining process for precise insection of a pinion shaft is characterized by comprising the following steps:

s1, a positioning assembly is arranged in a spring chuck of the numerical control horizontal gear hobbing machine, the tail (4) of a gear shaft (1) is inserted into the spring chuck, the positioning assembly is inserted into an installation groove (5), and the spring chuck clamps the gear shaft (1);

s2, the tip of the numerical control gear hobbing machine moves towards the head (2) close to the gear shaft (1) and abuts against the head (2) of the gear shaft (1) to realize the fixation of the gear shaft (1);

s3, moving the hob along the axis direction of the gear shaft (1), and roughly machining the gear grains on the belly (3) of the gear shaft (1);

s4, taking down the roughly processed gear shaft (1), and detecting whether the processed insections meet the requirements through a detection tool;

s5, preliminarily cleaning the gear shaft (1) meeting the requirements;

s6, feeding the cleaned gear shaft (1) into a numerical control vertical gear hobbing machine through a feeding device, installing the gear shaft on a spring chuck of the numerical control vertical gear hobbing machine, arranging the positioning assembly in the spring chuck, and forming a product meeting the requirements through finish machining.

2. The process for machining the precise insection of the pinion shaft according to claim 1, wherein the process comprises the following steps: locating component is including fixing connecting seat (7) on the digit control machine tool, coaxial being fixed with butt seat (8) on connecting seat (7), butt seat (8) diameter is greater than connecting seat (7) diameter, be fixed with locating piece (9) on butt seat (8), locating piece (9) cross-section is the waist type with mounting groove (5) complex, it is equipped with a plurality of balls (10) to inlay on the lateral wall that locating piece (9) are the plane setting, ball (10) butt is in the inside wall of mounting groove (5) of gear shaft (1).

3. The process for machining the precise insection of the pinion shaft according to claim 1, wherein the process comprises the following steps: the checking fixture comprises a base (12) and a top seat (11) which are horizontally arranged and a supporting rod (13) which is connected with the base (12) and the top seat (11), wherein a sliding hole (14) which penetrates through the top seat (11) is formed in the top seat (11), a sliding rod (15) is arranged in the sliding hole (14) in a sliding mode, the sliding rod (15) can rotate in the sliding hole (14), a positioning core (16) is fixed at the lower end of the sliding rod (15), the positioning core (16) is inserted into a mounting groove (5) of a gear shaft (1), a positioning bearing which is coaxial with the sliding hole (14) is embedded in the base (12), a head (2) of the gear shaft (1) is inserted into the positioning bearing, a lifting rod (17) is fixed on the base (12), the lifting rod (17) is parallel to the sliding rod (15), a lifting groove is formed in the lifting rod (17) in the length direction, a lifting block (18) is arranged in the sliding mode, a detection rod (19) which slides along the radial direction of the gear shaft (1) is arranged on the lifting block (18), and whether a clamping groove is formed in a standard tooth face (20) which is connected with a qualified detection groove is formed in a clamping groove.

4. The process for machining the precise insection of the pinion shaft according to claim 1, wherein the process comprises the following steps: the feeding device comprises a conveying belt (21) used for transferring parts, positioning seats (22) are placed on the conveying belt (21), positioning rods of cross sections and mounting grooves (5) matched with the mounting grooves on the gear shafts (1) are fixed on the positioning seats (22), the positioning rods are inserted into the mounting grooves (5) on the corresponding gear shafts (1), and the feeding device further comprises a material changing mechanism for changing parts.

5. The process for machining the precise insection of the pinion shaft according to claim 4, wherein the process comprises the following steps: the reloading mechanism comprises an installation cylinder (23) vertically arranged on the numerical control vertical hobbing machine, a rotary table (24) and a rotary table driving (24) rotating motor (51) are connected to the installation cylinder (23) in a rotating mode, a rotating piece rotating along with the rotary table (24) is fixed on the rotary table (24), a clamp used for clamping a part is arranged on the rotating piece, and a driving cylinder (52) which drives the installation cylinder (23) to move in the vertical direction is arranged on the numerical control vertical hobbing machine.

6. The process for machining the precise insection of the pinion shaft according to claim 5, wherein the machining process comprises the following steps: the rotation piece is including chassis (25) of coaxial coupling on carousel (24), the coaxial connecting cylinder (26) that is fixed with of terminal surface that deviates from carousel (24) in chassis (25), anchor clamps set up on connecting cylinder (26), anchor clamps are two sets of and are the symmetry setting with carousel (24) axis, two sets of rotation groove (27) with inside intercommunication are seted up to connecting cylinder (26) lateral wall, and two sets of anchor clamps stretch out from corresponding rotation groove (27), and same group's anchor clamps are including rotating axis of rotation (28) of connecting in connecting cylinder (26), and axis of rotation (28) are on a parallel with carousel (24) axis, be fixed with clamping rod (29) on axis of rotation (28), two the centre gripping groove that is used for centre gripping gear shaft (1) is offered to clamping rod (29) lateral wall, both ends are sealed about connecting cylinder (26), axis of rotation (28) run through connecting cylinder (26) up end and be fixed with be engaged in driven gear (30) of another axis of rotation (28) on the same group's anchor clamps, connecting cylinder (26) up end rotates and is connected with double-phase intermeshing's drive gear (31), two sets of drive gear (31) on the drive gear (31) respectively drive gear (31) drive connecting cylinder (32).

7. The process for machining the precise insection of the pinion shaft according to claim 6, wherein the process comprises the following steps: go up along axial coaxial logical groove (33) of having seted up on carousel (24), radially set up on carousel (24) with lead to four drive grooves (34) of groove (33) intercommunication, carousel (24) circumference evenly distributed is followed in four drive grooves (34), installation section of thick bamboo (23) internal rotation is connected with driving-disc (35), be fixed with drive block (36) of wearing to establish in one of them drive groove (34) on driving-disc (35), drive block (36) are eccentric settings with driving-disc (35), rotate motor (51) and drive driving-disc (35) and rotate and make drive block (36) drive carousel (24) pivoted angle at every turn be 90.

8. The process for machining the precise insection of the pinion shaft according to claim 7, wherein the process comprises the following steps: slide on the support of conveyer belt (21) and be provided with dog (37) that are used for blockking positioning seat (22) along with conveyer belt (21) motion, be fixed with driven rack (38) on dog (37), be provided with on dog (37) and promote dog (37) and block positioning spring that positioning seat (22) forward motion, rotate on the numerical control vertical lathe and be connected with limit gear (39) with driven rack (38) meshing, it is provided with the gag lever post that the level set up to slide on installation section of thick bamboo (23), gag lever post one end is provided with spacing rack (40), spacing rack (40) with limit gear (39) meshing, be provided with on carousel (24) and make the gag lever post motion and make dog (37) and the mechanism of stepping down of positioning seat (22) separation.

9. The process for machining the precise insection of the pinion shaft according to claim 8, wherein the process comprises the following steps: the mechanism of stepping down is including fixing cam (43) in driving-disc (35) pivot, the cover is equipped with the pulling gag lever post on the gag lever post and makes spacing spring (44) of stopper butt at cam (43) lateral wall all the time, the mechanism of stepping down is still including making the spacing subassembly that the gag lever post just made spacing rack (40) motion 180 when rotating.

10. The process for machining the precise insection of the pinion shaft according to claim 9, wherein the process comprises the following steps: the gag lever post includes driven lever (46) and butt in the actuating lever (45) of cam (43) of being connected with spacing rack (40) rotation, four groove (47) of stepping down have been seted up along its axial to actuating lever (45) tip, four groove (47) of stepping down are along actuating lever (45) circumference evenly distributed, driven lever (46) are four and can insert pole (48) of stepping down in groove (47), driven lever (46) lateral wall has a plurality of spacing lugs (49), driven lever (46) circumference evenly distributed is followed to spacing lug (49), be fixed with a plurality of drive lugs (50) on carousel (24), drive lug (50) are along circumference evenly distributed on carousel (24), drive lug (50) promote spacing lug (49) pivoted angle and be 90 and are used for the control to let the alignment or the dislocation of pole (48) and groove (47) of stepping down.