CN202199864U - Numerical-control compound gear milling hobbing machine for machining large module gears - Google Patents

Numerical-control compound gear milling hobbing machine for machining large module gears Download PDF

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Publication number
CN202199864U
CN202199864U CN2011202098595U CN201120209859U CN202199864U CN 202199864 U CN202199864 U CN 202199864U CN 2011202098595 U CN2011202098595 U CN 2011202098595U CN 201120209859 U CN201120209859 U CN 201120209859U CN 202199864 U CN202199864 U CN 202199864U
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China
Prior art keywords
gear
axle
tooth base
cutter
knife bar
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Expired - Lifetime
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CN2011202098595U
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Chinese (zh)
Inventor
刘建国
丁伟
吴峰
赵文涛
束长林
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Nanjing High Speed Gear Manufacturing Co Ltd
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Nanjing High Speed Gear Manufacturing Co Ltd
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Abstract

The utility model relates to a numerical-control compound gear milling hobbing machine for machining large module gears and application thereof. The numerical-control compound gear milling hobbing machine comprises a numerical-control computer and is characterized in that a disc milling cutter and a hobbing cutter are fixedly arranged on a cutter rod; a cutter rod gasket group is arranged between the hobbing cutter and the disc milling cutter; one surface of an angle sliding plate is butted with a cutter rest through a Y-direction guiderail and a Y-direction guide slot while the other surface of the angle sliding plate is supported on a vertical sliding plate through an A-direction shaft and an A-direction bearing; the other surface of the vertical sliding plate is butted with a stand column through a Z-direction guiderail and a Z-direction guide slot; the stand column is butted with a lathe bed through an X-direction guiderail and an X-direction guide slot which are arranged horizontally; a gear blank worktable is supported on the bottom surface through a C-direction shaft and a C-direction bearing, which are matched with each other; and a clamp is arranged on the gear blank worktable. Under the control of the numerical-control computer, the numerical-control compound gear milling hobbing machine for machining large module gears is capable of completing the processing of gearing milling and hobbing of a gear with modulus greater than or equal to 15mm at one time, so that the work efficiency is greatly improved.

Description

The compound mill teeth gear-hobbing machine of the numerical control of machining large-modulus gear
Technical field
The utility model relates to a kind of chain digital control gear hobbing machine and application thereof, especially relates to a kind of have simultaneously groove milling working ability and gear hobbing working ability, is exclusively used in the combined numerically controlled gear-hobbing machine and the application thereof of machining large-modulus gear.
Background technology
Industries such as wind-powered electricity generation, boats and ships, cement, metallurgy are fast-developing in recent years, and the demand of mechanical transmission is progressively soaring, as the critical component of mechanical transmission---and also when the river rises the boat goes up thereupon in the market of gear.
The processing mode of gear has a variety of, comprises gear hobbing, gear shaping, mill teeth, shaving, roll flute etc., and wherein large module gear adopts gear hobbing and mill teeth processing usually.
Gear hobbing belongs to generate processing, on gear-hobbing machine, uses the hobboing cutter gear hobbing, and hobboing cutter and processed gear rotate by certain speed ratio, on the end section of tooth base, processes the tooth of whole circle continuously, and hobboing cutter processes the tooth of full-depth tooth wheel width along the axis direction feeding of tooth base.Hobboing cutter be equivalent to the very big helical gear of helical angle with by the engagement of cutting crop rotation space, the hobboing cutter head is counted z1 and is equivalent to the helical gear number of teeth; The meshing relation of gear hobbing also can liken the engagement of worm gear pair to, and the hobboing cutter sword is positioned on the thread surface of worm screw, and hobboing cutter turns around, processed gear rotation z1/z circle.The hobboing cutter principal cutting movement of gear hobbing, profile of tooth generate, calibration, feeding and differential etc., continuously and carry out simultaneously.During the processing helical gear, the feeding of hobboing cutter is relevant with lead of screw, and movement relation is: when feeding distance equaled the lead of screw of gear, the differential gear that makes turned around.
Use and samely can process the gear of modulus, the different numbers of teeth that pressure angle is identical, helical angle, addendum modification to hobboing cutter, have good versatility, the gear pitch error of gear hobbing is little, and quality is also more stable.Yet when module was big, because cutting force is big, common hobboing cutter needed at twice or repeatedly cuts and could accomplish cutting, and production efficiency is lower.
Mill teeth belongs to the processing that is shaped, and section shape of cutter is identical with the slot form of processed gear, and cutter is along the teeth groove direction feeding of gear, and a teeth groove has milled, and behind the processed gear compound graduation, mills second teeth groove again, and the pitch of teeth of gear is controlled by calibration.When milling helical gear, the feed motion of milling cutter cooperates processed gear to rotate, and movement relation is: when feeding distance equaled the helical pitch of processed gear, processed gear was goed around.
Use dish milling cutter machining large-modulus gear, production efficiency is high more a lot of than common gear hobbing.Yet; Because the slot form of gear is relevant with the number of teeth, addendum modification even the transverse tooth thickness tolerance of gear, mill teeth is difficult to realize that tool-tooth profile and processed gear tooth slot are identical, and in fact the profile of tooth of mill teeth mostly is to be similar to profile of tooth; Therefore the versatility of milling cutter is very low, is widely used in roughing tooth.
For large module gear; The mode of at present taking mill teeth and gear hobbing separately to carry out usually promptly adopts two lathes, uses earlier a machine tool mill teeth; Arrive another lathe upper rolling tooth again behind the thick fluting of part; But the inevasible secondary clamping problem of having brought part of this method is reorientated and tool setting, makes working (machining) efficiency and machining accuracy all limit to some extent.
At present in gear machining apparatus, can carry out that groove milling and gear hobbing process simultaneously, do not appear in the newspapers.
The utility model content
The purpose of the utility model is: to gear machining apparatus; Especially the labour intensity of large module gear process equipment existence is bigger; Problems such as inefficiency provide a kind of combined numerically controlled gear-hobbing machine and application thereof of being exclusively used in the machining large-modulus gear that has groove milling working ability and gear hobbing working ability simultaneously.
The purpose of the utility model is achieved in that the compound mill teeth gear-hobbing machine of a kind of numerical control of machining large-modulus gear; The tooth base anchor clamps and the tooth base drive motors that are provided with on the knife bar that comprises digital control computer that process is controlled, drives through gear reduction by drive motors, the support; And be used to the fuel tank and the oil pump that cool off and lubricate, it is characterized in that:
Be installed with dish milling cutter and hobboing cutter on the described knife bar; Be provided with the knife bar washer sets between dish milling cutter and the hobboing cutter; Described knife bar washer sets contains a packing ring; Or dock successively by two identical packing rings of diameter of bore at least and form, the distance between hobboing cutter and the dish milling cutter is each packing ring actual height sum in the knife bar washer sets;
Knife bar is supported on the knife rest through bearing bracket and driving box, and the displacement mechanism between knife rest and the lathe bed comprises angle slide plate, vertical slide and column, and wherein: the one side of angle slide plate is docked with knife rest to guide rail and guide groove through the Y of coupling; The another side of angle slide plate is a vertical slide, is provided with bearing in the angle slide plate, be furnished with in the bearing axis along X to the A of level axle, the angle slide plate is connected with the A axle, and is supported on the vertical slide through the A axle; The another side of vertical slide docks with column to guide rail and guide groove through the Z of coupling; Docking with the lathe bed upper surface to horizontally disposed guide rail and guide groove of the underrun coupling of column along X; The axis of described A axle and C axle diaxon prolongs the back and intersects;
The lathe bed upper surface also is provided with the workbench bearing, is furnished with C to axle in the workbench bearing, and tooth base workbench tooth base is connected to axle with C, and tooth base workbench is supported in lathe bed through C to axle; Tooth base workbench is provided with anchor clamps, and the tooth base of processed gear passes through clamps on tooth base workbench;
In the machined parameters of processed gear, the modulus of gear should be more than or equal to 15mm.
In the utility model: each packing ring actual height is identical in the knife bar washer sets.
In the utility model: each packing ring actual height is inequality in the knife bar washer sets, or part is inequality.
In the utility model: described knife bar by the main axle servo motor through driving box drive knife rest along B to rotation; Described knife rest is driven through worm and gear to servomotor by Y and on the angle slide plate, makes Y to motion; Described angle slide plate is driven through worm and gear to servomotor by A and on vertical slide, makes A to rotatablely moving around the A axle; Described vertical slide is driven through worm and gear to servomotor by Z and on column, makes Z to moving both vertically; Described column is driven through the worm and gear kind of drive to servomotor by X and makes X to horizontal movement at the lathe bed upper surface; Described tooth base workbench by C to the axle servomotor through the worm and gear kind of drive in the lathe bed upper edge C to rotatablely moving;
In the utility model: the drive motors of oil pump, described each independent servomotor and knife bar and the duty of tooth base drive motors are all controlled through sequence controlled computer.
The advantage of the utility model is: owing in the Digit Control Machine Tool of a Gear Processing, adopt the tooth generating combined machining method, will coil milling cutter and hobboing cutter and be installed on the gear-hobbing machine together; Earlier use the milling cutter roughing tooth, use the smart gear hobbing of hobboing cutter again, give full play to the advantage of two kinds of processing modes; Guarantee the precision and the cutter versatility of gear, improved production efficiency, saved the lathe cost; Avoid the secondary clamping of part, stablized crudy.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Among the figure: 1, lathe bed, 2, the horizontally disposed X of coupling is to guide rail and guide groove, 3, column, 4, knife rest, 5, the vertically disposed Z of coupling is to guide rail and guide groove; 6, vertical slide, 7, the angle slide plate, 8, the A of coupling is to bearing and axle, 9, driving box, 10, the Y of coupling is to guide rail and guide groove; 11, dish milling cutter, 12, the knife bar washer sets, 13, hobboing cutter, 14, knife bar, 15, bearing bracket; 16, tooth base, 17, tooth base anchor clamps, 18, the C of coupling is to bearing and axle, 19, tooth base workbench
The specific embodiment
Accompanying drawing discloses the concrete structure of the utility model embodiment without limitation, below in conjunction with accompanying drawing the utility model is done to describe further.
The utility model is the same with traditional numerical control gear machining apparatus; Comprise digital control computer, knife bar 14 that process is controlled; One end of knife bar 14 is a driving box 9, and the other end is provided with bearing bracket 15, and knife bar 14 supports with driving box 9 through bearing bracket 15 and is installed on the knife rest 4; Be provided with main axle servo motor and gear reduction in the described driving box 9; The output of gear reduction and knife bar 14 butt-end, lathe bed 1 are provided with tooth base anchor clamps 17 and tooth base workbench 19 and C to the axle servomotor, and are used to the fuel tank and the oil pump that cool off and lubricate.
Visible by Fig. 1; The difference of the utility model and traditional numerical control Gear Processing is: be installed with dish milling cutter 11 and hobboing cutter 13 on the knife bar 14; Be provided with knife bar washer sets 12 between hobboing cutter 13 and the dish milling cutter 11; Described knife bar washer sets 12 is by containing a packing ring, or docked successively by two identical packing rings of diameter of bore at least and form, and the distance between hobboing cutter 13 and the dish milling cutter 11 is each packing ring actual height sum in the knife bar washer sets 12;
Displacement mechanism between knife rest 4 and the lathe bed 1 comprises angle slide plate 7, vertical slide 6 and column 3, and knife rest 4 is connected with guide groove 10 to guide rail through the Y that matees with the one side of angle slide plate 7; A through coupling between the vertical plane of the another side of angle slide plate 7 and vertical slide 6 is connected with axle 8 to bearing, and by the interior bearings of vertical slide 6, the A axis to level, and passes through the axle center of tooth base workbench 19 rotating shaft C axles along X; Z through coupling between the vertical plane of the another side of vertical slide 6 and column 3 is connected with guide groove 5 to guide rail; Docking to horizontally disposed guide rail and guide groove 2 through coupling between the bottom surface of column 3 and lathe bed 1 upper surface along X; Mechanism between tooth base 16 and the lathe bed 1 comprises tooth base workbench 19 and tooth base anchor clamps 17; C through coupling between the bottom surface of tooth base workbench 19 and lathe bed 1 upper surface is connected with spools 18 to bearing; By the bearings in the lathe bed 1, tooth base workbench 19 can rotate around the C axle; Tooth base 16 is connected with tooth base workbench 19 through tooth base anchor clamps 17;
During practical implementation, each packing ring actual height can be identical in the knife bar washer sets 12, also can select each packing ring actual height all inequality, or part is inequality.
During practical implementation, described knife bar 14 is rotated on knife rest 4 around the B axle through gear transmission mode by the main axle servo motor of driving box 9; Described knife rest 4 is driven through the worm and gear kind of drive to servomotor by Y and on angle slide plate 7, makes Y to motion; Described angle slide plate 7 is driven through the worm and gear kind of drive to servomotor by A and on vertical slide 6, makes A to rotatablely moving around its rotating shaft; Described vertical slide 6 drives it to servomotor through the worm and gear kind of drive by Z and on column 3, makes Z to moving both vertically; Described column 3 is driven through the worm and gear kind of drive to servomotor by X and is X to horizontal movement at lathe bed 1 upper surface; Described tooth base workbench 19 by C to the axle servomotor through the worm and gear kind of drive at lathe bed 1 upper edge C to motion.
During practical implementation, no matter be oil pump or described each independent servomotor, comprise that the duty of the main axle servo motor of the knife bar in the driving box 9 is all controlled through sequence controlled computer.
The present invention mainly is in the machined parameters of processed gear, the compound mill teeth gear-hobbing machine of a kind of numerical control that the modulus of gear should design more than or equal to the workpiece of 15mm.Application mode is following:
A) according to the machined parameters of processed gear, select corresponding dish milling cutter 11 and hobboing cutter 13, more described dish milling cutter 11 is assembled in knife bar 14 with hobboing cutter 13;
Need be when b) dish milling cutter 11 is with hobboing cutter 13 assemblings according to the external diameter and the width of dish milling cutter 11; The external diameter of hobboing cutter 13, length and cutting tool shape; And machined parameters such as transverse tooth thickness of processed gear, modulus, the number of teeth, helical angle, pressure angle; Confirm the distance between hobboing cutter 13 and the dish milling cutter 11, final through regulating knife bar washer sets 12 with the distance location between hobboing cutter of confirming 13 and the dish milling cutter 11;
C) qualified tooth base 16 is placed on the tooth base workbench 19, and fixing through tooth base anchor clamps 17;
D) connect working power; According to dish milling cutter 11 external diameters and width; Hobboing cutter 13 external diameters, length and cutting tool shape; The machined parameters of processed gear is like transverse tooth thickness, modulus, the number of teeth, helical angle, pressure angle, and the distance compilation procedure between hobboing cutter 13 and the dish milling cutter 11, and with its input sequence controlled computer;
E) sequence controlled computer sends the processing instruction, and the compound mill teeth gear-hobbing machine of numerical control is processed qualified tooth base according to procedure;
F) after the process finishing, unclamp tooth base anchor clamps 17, take off product from tooth base workbench 19.
During practical implementation, described sequence controlled computer sends the processing instruction and comprises in regular turn: dish milling cutter procedure, cutter changeover program, hobboing cutter procedure; Processing instruction also is included in work order and the C of oil pump in the whole machining process process corresponding rotation command to the axle servomotor.
Described dish milling cutter procedure comprises: start the main axle servo motor of knife bar 14, drive dish milling cutter 11 rotates around the B axle with hobboing cutter 13 synchronously, turns to suitable angle by A to driven by servomotor angle slide plate 7; Make the angle of inclination of dish milling cutter 11 axis satisfy the mill teeth requirement of tooth base 16, again by Y to driven by servomotor knife rest 4 along the Y of angle slide plate 7 to moving, make dish milling cutter 11 aim at the starting point of the teeth groove processing of tooth bases 16; Then by X to driven by servomotor column 3 along X to horizontal movement; The teeth groove machining starting point that makes the dish milling cutter 11 of rotation get into tooth bases 16 begins processing, in the processing by Z to driven by servomotor vertical slide 6 along Z to moving both vertically, the dish milling cutter 11 that makes rotation is moved to terminal point by the starting point of the teeth groove working position of tooth base 16; Until the processing of accomplishing a teeth groove; Again by X to driven by servomotor column 3 along X to horizontal movement, make the dish milling cutter 11 of rotation withdraw from the terminal point of tooth base 16 teeth groove working positions, then by Z to driven by servomotor vertical slide 6 along Z to moving both vertically; The starting point that makes the dish milling cutter 11 of rotation get back to tooth base 16 teeth groove working positions by the terminal point of the teeth groove working position of tooth base 16; Simultaneously, C rotates to axle driven by servomotor tooth base workbench 19, makes the next teeth groove machining starting point aligning dish milling cutter 11 of tooth base 16; By X to driven by servomotor column 3 along X to horizontal movement; Make the dish milling cutter 11 of rotation get into new teeth groove machining starting point again and begin processing, repeat successively, until accomplishing whole teeth groove processing; At last by X to driven by servomotor column 3 along X to horizontal movement, make the dish milling cutter 11 of rotation withdraw from the terminal point of teeth groove processing, and make whole column 3 retreat to home, end dish milling cutter procedure.
After dish milling cutter procedure finishes; Change the cutter changeover program over to, described cutter changeover program comprises: after column 3 retreats to home, turn to suitable angle by A to driven by servomotor angle slide plate 7; Make the axis inclination angle of hobboing cutter 13 satisfy the gear hobbing requirement of tooth base 16; Again by Y to driven by servomotor knife rest 4 along the Y of angle slide plate 7 to moving, make hobboing cutter 13 aim at the gear hobbing machining starting point of teeth groove, accomplish the cutter changeover program.
The hobboing cutter procedure is undertaken in the cutter changeover program; Described hobboing cutter procedure comprises: continued to rotate with certain speed to driven by servomotor tooth base workbench 19 by C; Make the velocity of rotation of tooth base 16 and the velocity of rotation of hobboing cutter 13 satisfy meshing relation; By X to driven by servomotor column 3 along X to horizontal movement, the machining starting point that makes the hobboing cutter 13 of the rotation of the gear hobbing machining starting point of aiming at teeth groove get into teeth groove begins processing, in the processing by Z to driven by servomotor vertical slide 6 along Z to moving both vertically; The hobboing cutter 13 that makes rotation is progressively moved to terminal point by the gear hobbing machining starting point of teeth groove, until the gear hobbing processing of accomplishing all teeth groove; At last by X to driven by servomotor column 3 along X to horizontal movement; Make the hobboing cutter 13 of rotation withdraw from the terminal point that gear hobbing is processed; And making whole column 3 retreat to home, the C of main axle servo motor and tooth base workbench 19 that closes knife bar 14 simultaneously finishes the gear hobbing procedure to axis drive motor.

Claims (5)

1. the compound mill teeth gear-hobbing machine of the numerical control of a machining large-modulus gear; The tooth base anchor clamps and the tooth base drive motors that are provided with on the knife bar that comprises digital control computer that process is controlled, drives through gear reduction by drive motors, the support; And be used to the fuel tank and the oil pump that cool off and lubricate, it is characterized in that:
Be installed with dish milling cutter and hobboing cutter on the described knife bar; Be provided with the knife bar washer sets between dish milling cutter and the hobboing cutter; Described knife bar washer sets contains a packing ring; Or dock successively by two identical packing rings of diameter of bore at least and form, the distance between hobboing cutter and the dish milling cutter is each packing ring actual height sum in the knife bar washer sets;
Knife bar is supported on the knife rest through bearing bracket and driving box, and the displacement mechanism between knife rest and the lathe bed comprises angle slide plate, vertical slide and column, and wherein: the one side of angle slide plate is docked with knife rest to guide rail and guide groove through the Y of coupling; The another side of angle slide plate is a vertical slide, is provided with bearing in the angle slide plate, be furnished with in the bearing axis along X to the A of level axle, the angle slide plate is connected with the A axle, and is supported on the vertical slide through the A axle; The another side of vertical slide docks with column to guide rail and guide groove through the Z of coupling; Docking with the lathe bed upper surface to horizontally disposed guide rail and guide groove of the underrun coupling of column along X; The axis of described A axle and C axle diaxon prolongs the back and intersects;
The lathe bed upper surface also is provided with the workbench bearing, is furnished with C to axle in the workbench bearing, and tooth base workbench tooth base is connected to axle with C, and tooth base workbench is supported in lathe bed through C to axle; Tooth base workbench is provided with anchor clamps, and the tooth base of processed gear passes through clamps on tooth base workbench;
In the machined parameters of processed gear, the modulus of gear should be more than or equal to 15mm.
2. the compound mill teeth gear-hobbing machine of the numerical control of machining large-modulus gear according to claim 1 is characterized in that: each packing ring actual height is identical in the knife bar washer sets.
3. the compound mill teeth gear-hobbing machine of the numerical control of machining large-modulus gear according to claim 1 is characterized in that: each packing ring actual height is inequality in the knife bar washer sets, or part is inequality.
4. according to the compound mill teeth gear-hobbing machine of the numerical control of the described machining large-modulus gear of one of claim 1~3, it is characterized in that: described knife bar by the main axle servo motor through driving box drive knife rest along B to rotation; Described knife rest is driven through worm and gear to servomotor by Y and on the angle slide plate, makes Y to motion; Described angle slide plate is driven through worm and gear to servomotor by A and on vertical slide, makes A to rotatablely moving around the A axle; Described vertical slide is driven through worm and gear to servomotor by Z and on column, makes Z to moving both vertically; Described column is driven through the worm and gear kind of drive to servomotor by X and makes X to horizontal movement at the lathe bed upper surface; Described tooth base workbench by C to the axle servomotor through the worm and gear kind of drive in the lathe bed upper edge C to rotatablely moving.
5. the compound mill teeth gear-hobbing machine of the numerical control of machining large-modulus gear according to claim 4 is characterized in that: the drive motors of oil pump, described each independent servomotor and knife bar and the duty of tooth base drive motors are all controlled through sequence controlled computer.
CN2011202098595U 2011-06-21 2011-06-21 Numerical-control compound gear milling hobbing machine for machining large module gears Expired - Lifetime CN202199864U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102248226A (en) * 2011-06-21 2011-11-23 南京高速齿轮制造有限公司 Numerical-control combined gear milling and hobbing machine for machining large-modulus gear and application thereof
CN102626808A (en) * 2012-05-09 2012-08-08 重庆理工大学 Method for processing large-module and large-diameter gear ring on horizontal boring machine
CN105234644A (en) * 2015-11-10 2016-01-13 常州市国茂立德传动设备有限公司 Machining method and machining tool for large-modulus and large-diameter gears
CN107042340A (en) * 2017-03-15 2017-08-15 江苏赫夫特齿轮制造有限公司 The processing technology of sector gear
CN108115410A (en) * 2018-02-06 2018-06-05 唐守林 A kind of combined-machining equipment
CN108247148A (en) * 2018-02-06 2018-07-06 唐守林 A kind of complex machining device
CN111805010A (en) * 2020-06-11 2020-10-23 西安法士特汽车传动有限公司 Method for processing gear with unequal-pitch hobbing cutter and taper tooth thickness flat tooth root structure
CN112548177A (en) * 2020-11-30 2021-03-26 重庆机床(集团)有限责任公司 Vertical numerical control slot milling machine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102248226A (en) * 2011-06-21 2011-11-23 南京高速齿轮制造有限公司 Numerical-control combined gear milling and hobbing machine for machining large-modulus gear and application thereof
CN102248226B (en) * 2011-06-21 2013-01-23 南京高速齿轮制造有限公司 Numerical-control combined gear milling and hobbing machine for machining large-modulus gear and application thereof
CN102626808A (en) * 2012-05-09 2012-08-08 重庆理工大学 Method for processing large-module and large-diameter gear ring on horizontal boring machine
CN102626808B (en) * 2012-05-09 2015-03-04 重庆理工大学 Method for processing large-module and large-diameter gear ring on horizontal boring machine
CN105234644A (en) * 2015-11-10 2016-01-13 常州市国茂立德传动设备有限公司 Machining method and machining tool for large-modulus and large-diameter gears
CN107042340A (en) * 2017-03-15 2017-08-15 江苏赫夫特齿轮制造有限公司 The processing technology of sector gear
CN108115410A (en) * 2018-02-06 2018-06-05 唐守林 A kind of combined-machining equipment
CN108247148A (en) * 2018-02-06 2018-07-06 唐守林 A kind of complex machining device
CN111805010A (en) * 2020-06-11 2020-10-23 西安法士特汽车传动有限公司 Method for processing gear with unequal-pitch hobbing cutter and taper tooth thickness flat tooth root structure
CN111805010B (en) * 2020-06-11 2021-12-07 西安法士特汽车传动有限公司 Method for processing gear with unequal-pitch hobbing cutter and taper tooth thickness flat tooth root structure
CN112548177A (en) * 2020-11-30 2021-03-26 重庆机床(集团)有限责任公司 Vertical numerical control slot milling machine
CN112548177B (en) * 2020-11-30 2022-02-22 重庆机床(集团)有限责任公司 Vertical numerical control slot milling machine

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