CN204053139U - Numerical control horizontal gantry Ding Liang cycloid gear milling machine - Google Patents

Numerical control horizontal gantry Ding Liang cycloid gear milling machine Download PDF

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Publication number
CN204053139U
CN204053139U CN201320853468.6U CN201320853468U CN204053139U CN 204053139 U CN204053139 U CN 204053139U CN 201320853468 U CN201320853468 U CN 201320853468U CN 204053139 U CN204053139 U CN 204053139U
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China
Prior art keywords
milling
numerical control
cutter
cycloid gear
control horizontal
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CN201320853468.6U
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Chinese (zh)
Inventor
方成刚
黄筱调
洪荣晶
于春建
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NANJING GONGDA CNC TECHNOLOGY Co Ltd
Nanjing Tech University
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NANJING GONGDA CNC TECHNOLOGY Co Ltd
Nanjing Tech University
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Abstract

A kind of numerical control horizontal gantry Ding Liang cycloid gear milling machine, is characterized in that comprising lathe bed (10), column (1), rectangular table (16), determining beam (2), milling spindle case (7), disc milling cutter (8), vertical rotating index table (15) and tail thimble support (11).This numerical control horizontal gantry Ding Liang cycloid gear milling machine structure is optimized, easy to operate, working (machining) efficiency is high, adapt to few number of teeth processing, cost performance is high, is applicable to the cycloid gear processing of the various batch of cycloidal reducer industry.Change different forming tools, be also applicable to the axial workpiece that other needs to process straight trough, as spline, motor rotor slot etc.In same input-output ratio situation, reduce customer investment and floor space, add the accommodation of equipment.

Description

Numerical control horizontal gantry Ding Liang cycloid gear milling machine
Technical field
The utility model belongs to advanced manufacture field, relates to a kind of cycloid gear machining tool, specifically a kind of numerical control horizontal gantry Ding Liang cycloid gear milling machine.Particularly relate to and utilize numerical control horizontal gantry to determine girder construction lathe to carry out one division form milling to cycloid gear.
Background technology
Utilize general hobbing machine to carry out to cycloid gear the main method that gear hobbing processing is current machining cycloidal gears, but there are some problems in this method:
1. utilize custom-designed cycloid high-speed steel hobboing cutter machining, be limited to cutter linear velocity and lathe rigidity, overall gear hobbing working (machining) efficiency is low, causes the shortcomings such as used device quantity is many, operating personnel are many, floor space is large.
2. due to the restriction of the rolling cut theory of engagement, cannot the few number of teeth cycloid gear of rolling cut.For few number of teeth cycloid gear, usually utilize pattern method to carry out profile milling at present, machining accuracy is low, precision is low, and needs to purchase a large amount of profiling moulds, and input cost is large.
3. gear hobbing is wet cuts processing generation fume pollution workshop condition, unfavorable to operator's health, does not meet the developing direction of green manufacturing.
Summary of the invention
The purpose of this utility model is to solve the deficiency existed in existing cycloid gear gear hobbing processing technology, provides a kind of numerical control horizontal gantry Ding Liang cycloid gear milling machine.Lathe adopts air-cooled dry type to cut, and utilizes numerical control device to realize process full-automation, and can bear effective powerful milling.
The technical solution of the utility model is as follows:
A kind of numerical control horizontal gantry Ding Liang cycloid gear milling machine, comprise lathe bed 10, column 1, rectangular table 16, determine beam 2, milling spindle case 7, disc milling cutter 8, vertical rotating index table 15 and tail thimble support 11, lathe bed 10 is installed on ground, " mountain one square " guide rail is processed with on the upside of lathe bed 10, composite slide guide rail is formed with the guide rail below rectangular table 16, X-axis axial feeding system 9 is provided with between lathe bed 10 and rectangular table 16, T-slot is offered above rectangular table 16, for fixing vertical rotary index table 15 and tail thimble support 11, two columns 1 be connected with ground are designed with in lathe bed 10 both sides, two column 1 tops are connected by determining beam 2, formed and determine beam 2 gantry structure, vertical feed rail plate is provided with in the front side of determining beam 2, to be coordinated with the guide rail on rear side of milling spindle case 7 by 4 pieces of Z axis pressing plates 5 and form radial feed rectangular rail pair, at milling spindle case 7 with determine to be provided with Z axis radial feed system 3 between beam 2.
4 principal shaft locking oil cylinders 6 are provided with between described Z axis pressing plate 5.
The main spindle box body 17 of described milling spindle case 7 adopts monoblock cast structure, main spindle box body 17 is processed with each driving hole system, main shaft variable-frequency motor 4 is installed on milling spindle case 7 top, by small arc-shaped toothed timing wheel 20, arc tooth synchronous belt 19, orthodrome toothed timing wheel 18, transfer a torque to an axle 21; One axle 21 moment of torsion is passed on main shaft 26 by two shaft transmission system 23, three shaft transmission system 24, four shaft transmission systems 25, and disc milling cutter 8 is arranged on the knife bar of main shaft 26, and motor rotary motion is passed on disc milling cutter 8 by above-mentioned drive shaft system.
Described rectangular table 16 is fixed with vertical rotating index table 15 and tail thimble support 11 by T-slot.Vertical rotating index table 15 realizes milling monodentate calibration by the accurate worm gear of driven by servomotor, and vertical rotating index table 15 floral disc T-slot is fixed with scroll chuck 14, for clamping work pieces.Tail thimble support 11 utilizes built-in oil cylinder locking workpiece.
Described disc milling cutter 8 is made up of cutterhead 27, blade 28 and cutter holder 29, blade 28 is fixed on cutterhead 27 by cutter holder 29, blade 28 adopts machine to press from both sides shaping throw away coated carbides, tooth shape is cycloid, the blade 28 be shaped utilizes the location structure of self to be placed in disc milling cutter 8 cutter groove, is anchored in cutter groove by cutter holder 29.
There is the endoporus of diameter 90mm in the middle of described cutter holder 29, be connected with the main shaft 26 of main spindle box body 17, and carry out moment of torsion transmission by the straight end-face key of disc milling cutter 8 both sides.
One division involved by the utility model powerful milling cycloid gear lathe belongs to numerical control formation milling machine tool, and lathe utilizes numerical control device to control, and is equipped with three servo feed kinematic axis and a frequency conversion main movement shaft.Three feed motions are respectively the axial feed motion along Workpiece length direction, and the radial feed along diameter of work direction moves, and realize the swivel feeding motion of workpiece one division; Main motion drives plate-like form cutter to carry out rotary cutting motion.Axial feed motion and radial feed motion all adopt straight-line feed servo-drive system to drive, and a point tooth motion adopts rotation of worm gear pair to carry out accurate one division motion, and main motion is driven by alternating current asynchronous variable-frequency motor.
The utility model adopts determines beam gantry structure.Arrange respectively in lathe both sides two independently column and ground be connected, column adopts tower structure, and internal placement honeycomb type gusset, has good dynamic and static stiffness characteristics, meets the powerful milling requirement of cycloid gear.Two column tops adopt determines beam connection, determining beam is composite rectangular structure, and inner employing box-type multilayer gusset, determines beam good without kinematic pair link, structural rigidity, bending moment of torsion and the vibration of the powerful milling of gear can be resisted, keep the high accuracy in milling process and stability.Ding Liang front is provided with the secondary and bearing block of rail plate, makes the feed system of radial motion for installing main spindle box and drive shaft.
Bed piece is between two columns, and lathe bed inside adopts honeycomb gusset to strengthen its dynamic and static rigidity, is designed to " mountain one square " complex rail plate, not only meets load bearing requirements but also meet the accurate guide-localization requirement of guide rail on the upside of lathe bed." mountain one square " guide rail below rectangular table face coordinates with lathe bed, realizes the axial feed motion of workpiece under servomotor and ball screw assembly, drive; Rectangular table has T-slot above face, for fixing turntable and tail thimble support.
The guide rail that the main spindle box back side is provided with slide guide rail and Ding Liang front forms radial feed guideway.Guideway side adopts wedge to carry out gap adjustment, has both ensured to meet again the stability of powerful milling by the guiding accuracy that radial feed moves; Guideway front adopts pressure plate structure fixed main shaft case, and the power of toppling of bearing main spindle box gravity and Milling Force formation is refused.During milling cycloid gear, cutter only makes axial feed motion, and radial direction maintains static.The key character of main spindle box radial feed motion is: for improving milling efficiency further, utilizes hydraulic jack to lock main spindle box, main spindle box is pressed on Ding Liangshang in milling process, can not produce vibration when making main spindle box bear powerful milling heavy duty because of guide clearance.Determining beam to be done the feed motion along workpiece radial direction, to adapt to the milling of different-diameter workpiece by servomotor and ball screw assembly, drive shaft case.
Main spindle box adopts alternating current asynchronous variable-frequency motor as power source, is met the milling linear velocity requirement under different operating mode by frequency converter adjustment motor speed.Motor output torque is input to the first axle of main spindle box body by arc tooth synchronous belt and belt wheel.Be provided with five grades of gears between main spindle box first axle to cutter spindle altogether, carry out deceleration increasing by gear pair and turn round, meet the high pulling torque requirement of powerful milling.The key character of main spindle box main transmission is to use double sided gear drive gap-eliminating structure, reduction rotational noise effectively, improves processed surface smoothness.Main spindle box inside all adopts Helical gear Transmission, and is axial float gear by the side design of gears of the first axle, realizes axial float and transmitting torque by square key, and the power source of gear axial float comes from the disappear gap oil cylinder of empty set on an axle.During main spindle box Milling Process, by the gap oil cylinder that disappears, floating gear is produced to move axially, utilize the additional rotational motion of helical gear helicoid principle formative gear and the restriction relation of double sided gear drive, effectively eliminate the gear clearance of gear-box internal main transmission, avoiding the Non-Linear Vibration that main transmission produces when bearing interrupted high-rate cutting power, improve process quality.
The utility model adopts forming manufacturing cycloid gear, and institute's use cutter is cut the disk cutter that shape adapts with workpiece spindle.Described dise knife adopts machine holding carbide alloy coated chip, and blade is shaping cycloid shape, directly can process cycloidal tooth profile.Profile of tooth overlap is arranged at cycloidal tooth profile root by dise knife, and removes blade overlap by follow-up grinding, makes whole flank of tooth end cut shape without cusp, and aesthetic appeal, stress are concentrated less.
Be equipped with air cooling equipment above described disk cutter, utilize pressure-air cooling cutting zone, improve cutter life; And utilize wind speed to clean tool surface, prevent the sticky iron filings of tool surface from forming secondary to finished surface and scratch, improve milling surface quality.
Be fixed on the monodentate calibration of the gyroaxis on front side of rectangular table face for cycloid gear, described turntable adopts pricision method to carry out calibration to straight wide worm gear, can realize arbitrary indexing, meet the Gear Processing of the different number of teeth by driven by servomotor.Behind turntable calibration location, locked by hydraulic jack, that bears powerful milling process overturns power, ensures the calibration accurate positioning in workpiece milling process.
The floral disc of rotary index turntable is fixed with scroll chuck for clamping work pieces end.Push pin device is fixed with, for the other end of fixation workpiece on rear side of rectangular table.The utility model presses the corresponding clamping plug of bore design of different size cycloid gear, is fixed on plug by multiple workpiece simultaneously, realizes clamped one time and process multiple workpiece simultaneously, to improve working (machining) efficiency.
The beneficial effects of the utility model:
Numerical control horizontal gantry of the present utility model Ding Liang cycloid gear milling machine adopts modularized design, the lathe of high rigidity theory design can bear heavily loaded high-rate cutting, coordinate special cycloid empiecement carbide alloy wire rod quality, Tool in Cutting linear velocity reaches 150m/min, greatly improves working (machining) efficiency.
Numerical control horizontal gantry of the present utility model Ding Liang cycloid gear milling machine adopts air-cooled cutting technology, does not produce cutting mist of oil, does not need to process waste oil, workshop condition is improved, saves cooling fluid cost, meets the direction that environmental protection manufactures.Utilize form milling principle, without the restriction of the milling number of teeth, the cycloid gear of the minimum number of teeth can be processed.
Numerical control horizontal gantry of the present utility model Ding Liang cycloid gear milling machine utilizes finish-milling forming disk milling cutter directly can form processing to cycloid gear flank profil, and forming accuracy reaches GB 7-8 level, and forming accuracy is high, surface roughness is better than traditional gear hobbing technique.Lathe can adapt to the cycloid gear Milling Process of arbitrary diameter within 800mm, and clamped one time can the multiple gear of milling simultaneously, and lathe comprehensive process efficiency improves 6-8 doubly than traditional gear hobbing efficiency.
Accompanying drawing explanation
Fig. 1 is the overall perspective view of numerical control horizontal gantry of the present utility model Ding Liang cycloid gear milling machine.
Fig. 2 is the side view of numerical control horizontal gantry of the present utility model Ding Liang cycloid gear milling machine.
Fig. 3 is main spindle box drive mechanism schematic diagram of the present utility model.
Fig. 4 is the structural representation of disk cutter of the present utility model.
Fig. 5 is the radial cross-section of disk cutter of the present utility model.
In figure: 1, column; 2, Ding Liang; 3, Z axis radial feed system; 4, main shaft variable-frequency motor; 5, Z axis pressing plate; 6, principal shaft locking oil cylinder; 7, milling spindle case; 8, disc milling cutter; 9, X-axis axial feeding system; 10, lathe bed; 11, tail thimble support; 12, cycloid gear workpiece; 13, clamping plug; 14, scroll chuck; 15, vertical rotating index table; 16, rectangular table; 17, main spindle box body; 18, orthodrome toothed timing wheel; 19, arc tooth synchronous belt; 20, small arc-shaped toothed timing wheel; 21, an axle; 22, an axle pinion; 23, two shaft transmission systems; 24, three shaft transmission systems; 25, four shaft transmission systems; 26, main shaft, 27 is cutterhead, 28 is blade, 29 for cutter holder.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1, numerical control horizontal gantry of the present utility model Ding Liang cycloid gear milling machine by lathe bed 10, column 1, rectangular table 16, determine the part such as beam 2, milling spindle case 7, disc milling cutter 8, vertical rotating index table 15, tail thimble support 11, cooling system, control system and form.
Lathe bed 10 is installed on ground, is processed with " mountain one square " guide rail, forms composite slide guide rail with the guide rail below rectangular table 16 on the upside of lathe bed 10, all frees degree of constraint except workpiece axially-movable.Be provided with X-axis axial feeding system 9 between lathe bed 10 and rectangular table 16, form straight-line feed servo-drive system by servomotor, planetary reduction gear, bearing block and ball screw assembly, meet the axial feed motion of workpiece milling process.T-slot is offered, for fixing vertical rotary index table 15 and tail thimble support 11 above rectangular table 16.
Being designed with two columns, 1, two column 1 tops be connected with ground to be connected by determining beam 2 in lathe bed 10 both sides, being formed and determining beam 2 gantry structure.Be provided with vertical feed rail plate in the front side of determining beam 2, coordinated with the guide rail on rear side of milling spindle case 7 by 4 pieces of Z axis pressing plates 5 and form radial feed rectangular rail pair.At milling spindle case 7 with determine to be provided with Z axis radial feed system 3 between beam 2, form straight-line feed servo-drive system by servomotor, planetary reduction gear, bearing block and ball screw assembly, meet the radial feed motion of workpiece milling process.In addition, between Z axis pressing plate 5, be provided with 4 principal shaft locking oil cylinders 6, for the locking in workpiece milling process, prevent powerful milling from causing the vibration of platen gap, affect stable cutting process.
As shown in Figure 3, the main spindle box body 17 of milling spindle case 7 adopts monoblock cast structure to main spindle box drive mechanism, and main spindle box body 17 is processed with each driving hole system.Main shaft variable-frequency motor 4 is installed on milling spindle case 7 top, by small arc-shaped toothed timing wheel 20, arc tooth synchronous belt 19, orthodrome toothed timing wheel 18, transfers a torque to an axle 21; One axle 21 moment of torsion is passed on main shaft 26 by two shaft transmission system 23, three shaft transmission system 24, four shaft transmission systems 25, and disc milling cutter 8 is arranged on the knife bar of main shaft 26.Motor rotary motion is passed on disc milling cutter 8 by above-mentioned drive shaft system, realizes speed change between 40-170rpm by frequency control and transmission system deceleration milling cutter, meets different demand of cutting operating mode.Main spindle box inside adopts bilateral gear transmission, and realizes disappearing gap by oil cylinder, reduces cutting vibration.
Rectangular table 16 is fixed with vertical rotating index table 15 and tail thimble support 11 by T-slot.Vertical rotating index table 15 realizes milling monodentate calibration by the accurate worm gear of driven by servomotor, utilizes hydraulic jack and the built-in brake block of turntable to lock, prevent Milling Force from causing worm gear meshing backlass to vibrate after calibration.Vertical rotating index table 15 floral disc T-slot is fixed with scroll chuck 14, for clamping work pieces.Tail thimble support 11 utilizes built-in oil cylinder locking workpiece.
Fig. 4 is the disc milling cutter of milling cycloid gear, is made up of cutterhead 27, blade 28 and cutter holder 29.Blade 28 is fixed on cutterhead 27 by cutter holder 29.Blade 28 adopts machine to press from both sides shaping throw away coated carbides, and tooth shape is cycloid, directly Milling Process can go out flank profil.The blade 28 be shaped utilizes the location structure of self to be placed in disc milling cutter 8 cutter groove, is anchored in cutter groove by cutter holder 29.There is the endoporus of diameter 90mm in the middle of cutter holder 29, be connected with the main shaft 26 of main spindle box body 17, and carry out moment of torsion transmission by the straight end-face key of disc milling cutter 8 both sides.
The utility model milling cycloid gear process is as follows: to be connected in series with by multiple cycloid gear workpiece 12 on clamping plug 13 and fastening simultaneously, is individually fixed between the scroll chuck 14 of vertical rotating index table 15 and tail thimble support 11 at clamping plug 13 two ends.Start lathe main shaft drives disk cutter to rotate, automatically main spindle box is fed to relevant position according to diameter of work size by the radial vertical feed axle of numerical control, start numerical control axial feed axle and make axial feed, the same position teeth groove of the multiple workpiece of milling simultaneously.After the complete teeth groove of milling, do single point of tooth by rotating shaft, repeat the next teeth groove of above-mentioned action milling.Until the complete all teeth groove of milling, dismounting workpiece.
This machine tool structure is optimized, easy to operate, working (machining) efficiency is high, adapt to few number of teeth processing, cost performance is high, is applicable to the cycloid gear processing of the various batch of cycloidal reducer industry.Change different forming tools, be also applicable to the axial workpiece that other needs to process straight trough, as spline, motor rotor slot etc.In same input-output ratio situation, reduce customer investment and floor space, add the accommodation of equipment.
Embodiment recited above is only be described preferred embodiment of the present utility model; not design of the present utility model and scope are limited; do not departing under the utility model design concept prerequisite; the various modification that in this area, common engineers and technicians make the technical solution of the utility model and improvement; all should fall into protection domain of the present utility model, the technology contents of the utility model request protection is all recorded in detail in the claims.

Claims (6)

1. numerical control horizontal gantry Ding Liang cycloid gear milling machine, it is characterized in that comprising lathe bed (10), column (1), rectangular table (16), determine beam (2), milling spindle case (7), disc milling cutter (8), vertical rotating index table (15) and tail thimble support (11), lathe bed (10) is installed on ground, lathe bed (10) upside is processed with " mountain one square " guide rail, composite slide guide rail is formed with the guide rail below rectangular table (16), X-axis axial feeding system (9) is provided with between lathe bed (10) and rectangular table (16), T-slot is offered in rectangular table (16) top, for fixing vertical rotary index table (15) and tail thimble support (11), two columns (1) be connected with ground are designed with in lathe bed (10) both sides, two column (1) tops are connected by determining beam (2), formed and determine beam (2) gantry structure, vertical feed rail plate is provided with in the front side of Ding Liang (2), coordinated by the guide rail of 4 pieces of Z axis pressing plates (5) and milling spindle case (7) rear side and form radial feed rectangular rail pair, Z axis radial feed system (3) is provided with between milling spindle case (7) He Dingliang (2).
2. numerical control horizontal gantry according to claim 1 Ding Liang cycloid gear milling machine, is characterized in that being provided with 4 principal shaft locking oil cylinders (6) between described Z axis pressing plate (5).
3. numerical control horizontal gantry according to claim 1 Ding Liang cycloid gear milling machine, it is characterized in that the main spindle box body (17) of described milling spindle case (7) adopts monoblock cast structure, main spindle box body (17) is processed with each driving hole system, main shaft variable-frequency motor (4) is installed on milling spindle case (7) top, by small arc-shaped toothed timing wheel (20), arc tooth synchronous belt (19), orthodrome toothed timing wheel (18), transfer a torque to an axle (21); One axle (21) moment of torsion is passed on main shaft (26) by two shaft transmission systems (23), three shaft transmission systems (24), four shaft transmission systems (25), disc milling cutter (8) is arranged on the knife bar of main shaft (26), and motor rotary motion is passed on disc milling cutter (8) by above-mentioned drive shaft system.
4. numerical control horizontal gantry according to claim 1 Ding Liang cycloid gear milling machine, it is characterized in that described rectangular table (16) is fixed with vertical rotating index table (15) and tail thimble support (11) by T-slot, vertical rotating index table (15) realizes milling monodentate calibration by the accurate worm gear of driven by servomotor, vertical rotating index table (15) floral disc T-slot is fixed with scroll chuck (14), for clamping work pieces; Tail thimble support (11) utilizes built-in oil cylinder locking workpiece.
5. numerical control horizontal gantry according to claim 1 Ding Liang cycloid gear milling machine, it is characterized in that described disc milling cutter (8) is made up of cutterhead (27), blade (28) and cutter holder (29), blade (28) is fixed on cutterhead (27) by cutter holder (29), blade (28) adopts machine folder shaping throw away coated carbides, tooth shape is cycloid, the blade (28) be shaped utilizes the location structure of self to be placed in disc milling cutter (8) cutter groove, is anchored in cutter groove by cutter holder (29).
6. numerical control horizontal gantry according to claim 5 Ding Liang cycloid gear milling machine, it is characterized in that the endoporus having diameter 90mm in the middle of described cutter holder (29), be connected with the main shaft (26) of main spindle box body (17), and carry out moment of torsion transmission by the straight end-face key of disc milling cutter (8) both sides.
CN201320853468.6U 2013-12-23 2013-12-23 Numerical control horizontal gantry Ding Liang cycloid gear milling machine Expired - Fee Related CN204053139U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103722250A (en) * 2013-12-23 2014-04-16 南京工业大学 Numerically-controlled horizontal-gantry fixed-girder milling machine for cycloid gears
CN105269081A (en) * 2015-11-11 2016-01-27 重庆荆江汽车半轴有限公司 Machining tool for machining oblique spline
CN106956044A (en) * 2017-03-10 2017-07-18 江苏飞船股份有限公司 Spiral bevel gear teeth portion dry cutting technique and cutter
CN109014441A (en) * 2018-08-03 2018-12-18 安徽六方重联机械股份有限公司 A kind of high-precision binodal Gear Processing mechanism
CN109773507A (en) * 2019-03-27 2019-05-21 安徽省矿业机电装备有限责任公司 A kind of Cutting tool installation manner method of milling machine quick processing device
CN115178780A (en) * 2022-09-08 2022-10-14 成都永峰科技有限公司 Aviation thin-wall part milling device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103722250A (en) * 2013-12-23 2014-04-16 南京工业大学 Numerically-controlled horizontal-gantry fixed-girder milling machine for cycloid gears
CN103722250B (en) * 2013-12-23 2017-01-11 南京工业大学 Numerically-controlled horizontal-gantry fixed-girder milling machine for cycloid gears
CN105269081A (en) * 2015-11-11 2016-01-27 重庆荆江汽车半轴有限公司 Machining tool for machining oblique spline
CN106956044A (en) * 2017-03-10 2017-07-18 江苏飞船股份有限公司 Spiral bevel gear teeth portion dry cutting technique and cutter
CN109014441A (en) * 2018-08-03 2018-12-18 安徽六方重联机械股份有限公司 A kind of high-precision binodal Gear Processing mechanism
CN109014441B (en) * 2018-08-03 2021-09-28 深圳市合发齿轮机械有限公司 High-precision double-section gear machining mechanism
CN109773507A (en) * 2019-03-27 2019-05-21 安徽省矿业机电装备有限责任公司 A kind of Cutting tool installation manner method of milling machine quick processing device
CN115178780A (en) * 2022-09-08 2022-10-14 成都永峰科技有限公司 Aviation thin-wall part milling device
CN115178780B (en) * 2022-09-08 2022-12-09 成都永峰科技有限公司 Aviation thin-wall part milling device

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Granted publication date: 20141231

Termination date: 20161223