CN106583858A - Large broaching tool for one-step broaching forming - Google Patents
Large broaching tool for one-step broaching forming Download PDFInfo
- Publication number
- CN106583858A CN106583858A CN201611195798.5A CN201611195798A CN106583858A CN 106583858 A CN106583858 A CN 106583858A CN 201611195798 A CN201611195798 A CN 201611195798A CN 106583858 A CN106583858 A CN 106583858A
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- Prior art keywords
- broaching
- broaching tool
- broach
- spline
- rough
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
- B23F21/26—Broaching tools
- B23F21/268—Pot broaches
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
The invention relates to a large broaching tool for one-step broaching forming. The large broaching tool comprises a broaching tool body and fasteners, and is characterized in that the broaching tool body is of a circular-barrel-shaped structure, a three-section broaching structure comprising a rough broaching tool case, a thick tooth-expanding fine tool case with tooth-skipping-structure circular holes, and a spline rough broaching part, a front handle and a rear handle are arranged on the broaching tool body; the spline rough broaching part is formed through machining at the middle section of the broaching tool body; the rough broaching tool case is fixed to the front part of the broaching tool body in a sleeving manner, the thick tooth-expanding fine tool case with the tooth-skipping-structure circular holes is fixed to the rear part of the broaching tool body in a sleeving manner, and the front handle and the rear handle are arranged in a front barrel and a rear barrel of the broaching tool body respectively, and are fastened through the fasteners respectively. Each of the broaching tool body, the rough broaching tool case, the thick tooth-expanding fine tool case with the tooth-skipping-structure circular holes, the front handle and the rear handle is provided with a location key slot. Front broaching teeth, rear broaching teeth, spline tooth roots and spline teeth are arranged on the broaching tool body. According to the large broaching tool disclosed by the invention, the assembly links of the broaching tool are reduced, the influence of an assembly error on the accuracy of the broaching tool is eliminated, and a chamfering tool case is not needed; and the large broaching tool is simple to machine, low in cost, easy to install and detach, and reliable in quality.
Description
Technical field
The present invention relates to a kind of big broaching tool of a pulling shaping, it is a kind of big broaching tool for large-scale internal gear.
Background technology
At present, the big broaching tool of the ring gear of gear because difficulty of processing it is big, big broaching tool is expensive by import price for a long time, not only needs
A large amount of foreign exchanges are spent, while broaching tool complex structure, once broaching tool goes wrong in use, it is difficult to and solve in time, give production band
Carry out inconvenience.And the big broaching tool of the country is one group of three drawing or two one group of structure of drawing, the big broaching tool of this structure is in broaching process
In need resetting, efficiency is low, broaching high cost and unstable product quality.Accordingly, it would be desirable to develop one kind once broach into
The big broaching tool of type, for improving broaching efficiency, it is ensured that stable and reliable product quality；Meanwhile, save a large amount of foreign exchanges and substantially reduce
Broaching production cost.
The content of the invention
It is an object of the invention to overcome the shortcomings of prior art and defect, there is provided one kind processing is simple, cutting force is equal
The big broaching tool of one pulling shaping of the large-scale internal gear of weighing apparatus, reliable in quality, high working efficiency and long service life.
Technical scheme：A kind of big broaching tool of a pulling shaping, including broach body, pull end, rear lug and securing member,
It is characterized in that the broach body of described big broaching tool be cylinder-like structure, the broach body be three sections broaching structures, i.e., this three
It is roughing broach that section broaching structure is rough broach shell, the expansion transverse tooth thickness essence broach shell of jump toothing circular hole and the rough structure of spline, i.e. front portion
Set, centre is the rough structure of spline, and rear portion is the expansion transverse tooth thickness essence broach shell for jumping toothing circular hole；It is logical that centre is the rough structure of spline
Cross processing to be formed, the assembling link that three sections of broaching structures reduce broaching tool is set, eliminate impact of the rigging error to broaching tool precision, nothing
Palpus chamfering broach shell, processing is simple, and low cost, handling are easy, reliable in quality.
Described pull end, rear lug be separately positioned on broach body before and after in cylinder, and by front bolt, flat key, rear bolt
With screw fastening.
Rough broach shell in described broach body, expansion transverse tooth thickness essence broach shell, pull end and the rear lug for jumping toothing circular hole is all provided with
There is positioning spline；For ensureing broaching tool assembly precision.
The rough part of spline in described broach body is provided with front broach teeth and rear broach teeth, sets in the rough structure of spline
There are spline root portion and spline tooth；The spline root portion is provided with chamfer angle θ, and rise per tooth δ 1 of front broach teeth is 0.05～0.08mm,
Afterwards rise per tooth δ 2 of broach teeth is 0.06～0.09mm.Parameters Optimal Design is carried out to broaching tool, segmentation is taken, is drawn the method for shelves,
Appropriate design rise per tooth, balanced cutting force, on the premise of broach length is not increased, cutting force is controlled within 55 tons, it is ensured that
Broaching tool can normally broach on the broaching machine of 60 tonnages.
Chamfer angle θ is provided with spline root portion in the rough structure of described spline；Its chamfer angle θ=（180 °/number of teeth+work
Part chamfering angle）×2 .By chamfer design in the root of spline broaching tooth, the processing and manufacturing of broaching tool was both ensured, can guarantee that again
Precision,
And the long service life of broaching tool, the good product quality of broaching.
Described broach body length is 2120mm～2620mm.
Described rough broach shell, the expansion transverse tooth thickness essence broach shell of jump toothing circular hole and broach body are high-quality high-speed steel knot
Structure, pull end and rear lug be made by 9CrSi materials before and after handle.
This big broaching tool employs spline and circular hole carries out thick, smart separate structure design, i.e., rough spline tooth using gradually into
Formula is broached, and finish draw spline tooth adopts profile broaching, is the bulk life time for extending broaching tool as far as possible, allows each section of cutting tooth of broaching tool
Benefit is all played as far as possible, and thick, smart broach shell adopts the assembling structure of replaceable sleeve cartridge type.
The expansion transverse tooth thickness essence broach shell of the jump toothing circular hole of big broaching tool is spaced using involute teeth, round tooth, i.e., path centering,
Coaxial-type jumps toothing, carries out the compound broaching of endoporus, profile of tooth, and this toothrow mode is almost workpiece path and involute flank
At the same position of broaching tool, while being processed out, the impact of broaching machine kinematic accuracy and broaching tool linearity can be eliminated, workpiece it is same
Axle degree is determined by broaching tool round tooth to the axiality of involute teeth cyclotomy.The expansion transverse tooth thickness essence broach shell of the jump toothing circular hole of big broaching tool
Spline tooth tooth top be not involved in cutting, rise per tooth is arranged in side edge, therefore flank must have relief angle, in order to fully extend the broaching tool longevity
Life, side relief angle is designed to the relief grinding shaping of the axial direction of α=20 ' ~ 50 '.
The rough spline teeth portion of this big broaching tool, to form certain side relief angle, is subtracted using manufacturing and designing for back centre is raised
Friction behind little broaching tool cutter tooth side with workpiece, had both reduced the surface quality that cutting force in turn ensure that broaching.Big Broach Design into
Fabricated construction, be decomposed into front shank, rough broach shell, rough spline teeth portion, jump toothing circular hole expansion transverse tooth thickness essence broach shell and after
Shank, cutting portion high-quality high-speed steel, shank 9CrSi materials in front and back, broach body is cylinder-like structure, to ensure that blade has
Good quenching degree, while quenching distortion can be reduced, can also mitigate broaching tool deadweight.
In sum, it is rough broach shell that broaching part of the invention is designed as three-stage structure, i.e. front portion, and centre is that spline is thick
Pull portion, rear portion is the expansion transverse tooth thickness essence broach shell for jumping toothing circular hole.Make it reduce the assembling link of broaching tool using three-stage structure, disappear
Except impact of the rigging error to broaching tool precision, without chamfering broach shell, processing is simple, and low cost, handling are easy, and cutting force is balanced,
Reliable in quality, high working efficiency and long service life.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the B-B cross section structure diagrams of the present invention；
Fig. 3 is front broach teeth close-up schematic view；
Fig. 4 is rear broach teeth close-up schematic view；
Fig. 5 is the close-up schematic view of Fig. 1；
Fig. 6 is spline root portion chamfering enlarged diagram；
Fig. 7 is the enlarged diagram for expanding tooth on transverse tooth thickness essence broach shell.
1- broach bodies in figure, 2- circular hole broach shells, 3- bolts, 4- screws, 5- flat keys, 6- pull ends, 7- expands transverse tooth thickness essence knife
Set, 8- stove bolts, 9- rear lugs, 10- keyways, broach teeth before 22-, broach teeth after 23-, 32- spline root portions, 33- spline tooths.
Specific embodiment
Refering to above-mentioned accompanying drawing, a kind of big broaching tool of a pulling shaping, including broach body 1, pull end 6, rear lug 9 and securing member,
It is characterized in that the broach body 1 of described big broaching tool is cylinder-like structure, the broaching tool is three sections of broaching structures, and this three sections are broached
Structure is rough broach shell 2, jumps the rough broach body 1 of the expansion transverse tooth thickness essence broach shell 7 and spline of toothing circular hole, i.e. front portion is rough
Broach shell 2, centre is the rough broach body 1 of spline, and rear portion is the expansion transverse tooth thickness essence broach shell 7 for jumping toothing circular hole；Three sections of broachings are set
Structure reduces the assembling link of broaching tool, eliminates impact of the rigging error to broaching tool precision, and without chamfering broach shell, processing is simple, into
This is low, and handling are easy, reliable in quality.
Described pull end 6, rear lug 9 be separately positioned on broach body 1 before and after in cylinder, and by front bolt 3, flat key, after
Bolt 8 and screw 4 are fastened.
The rough broach shell 2 being set with described broach body 1, the expansion transverse tooth thickness for jumping toothing circular hole essence broach shell 7, the He of pull end 6
Rear lug 9 is equipped with positioning spline 10；For ensureing broaching tool assembly precision.
Described broach body 1 is provided with front broach teeth 22, and rear broach teeth 23, and the rough structure of spline is provided with spline tooth
Root 32 and spline tooth 33；The spline root portion 32 is provided with chamfer angle θ.
Rise per tooth δ 1 of described front broach teeth 22 is 0.05～0.08mm, rise per tooth δ 2 of rear broach teeth 23 is 0.06～
0.09mm.Parameters Optimal Design is carried out to broaching tool, segmentation is taken, is drawn the method for shelves, appropriate design rise per tooth, balanced cutting force,
On the premise of broach length is not increased, cutting force is controlled within 55 tons, it is ensured that drawn
Knife can normally broach on the broaching machine of 60 tonnages.
Chamfer angle θ is provided with spline root portion 32 in the rough structure of described spline；Its chamfer angle θ=（180 °/number of teeth+
Workpiece chamfering angle）×2 .By chamfer design in the root of spline broaching tooth, the processing and manufacturing of broaching tool was both ensured, and can protect
Card precision,
And the long service life of broaching tool, the good product quality of broaching.
The described length of broach body 1 is 2220mm.
Described rough broach shell 2, the expansion transverse tooth thickness essence broach shell 7 and the rough structure broach body 1 of spline for jumping toothing circular hole are equal
For high-quality high-speed-steel structure, pull end（6）Handle before and after being made by 9CrSi materials with rear lug 9.
The present invention is described in detail as follows by taking the big broaching tool of steyr ring gears as an example：
The big broaching tool of steyr ring gears is due to integrating major diameter, overlength degree, high accuracy, a diameter of 238.05mm of big broaching tool；
Under structural design scheme is in view of realities of aspect such as domestic equipment condition, process meanses, material supplies, broaching tool was both ensured
Precision reaches 6 grades of DIN3961 standards, it is ensured that the product quality of broaching complies fully with requirement, and service life, the work of broaching tool are made again
Making efficiency will reach requirement, using the principles of structural design of " assembled, segmentation broaching, molding of once broaching ", with generating broaching and
The mode combined with exterior feature formula designs sword tooth.
The broaching part of big broaching tool is three sections, and front portion is rough broach shell 2, and centre is the broach body 1 of the rough part of spline,
Rear portion is the expansion transverse tooth thickness essence broach shell 7 for jumping toothing.This broach body 1, rough broach shell 2, the expansion transverse tooth thickness essence knife for jumping toothing circular hole
Positioning spline 10 is equipped with set 7, pull end 6 and rear lug 9, positioning spline 10 is for ensuring that broaching tool assembly precision.
Refering to Fig. 1, Fig. 3 and Fig. 4, on the body 1 of broaching tool, segmentation, the method for drawing shelves reasonable arrangement rise per tooth are taken,
Which is provided with front broach teeth 22 and rear broach teeth 23.The broaching amount of broach teeth 22 is more before rough spline position on body 1, is guarantor
Card cutting force is less than 55 tons, and rise per tooth δ 1 of front broach teeth 22 is designed as 0.072mm, and the broaching amount of rear broach teeth 23 is less, after
Rise per tooth δ 2 of broach teeth is designed as 0.082mm.According to Fz=F ' x*N*B*Zn*K1*K2*K3 pulling force computing formula, make forward and backward
The cutting force of section is balanced, reaches that cutting force is less than normal, pre-and-post equalization purpose.
Fz --- cutting force
F ' x --- the cutting force on unit length cutting edge
N --- broaching tool spline bond number
The cutting edge width of one cutter tooth of B --- broaching tool
Zn --- broaching tool works the number of teeth simultaneously
K1 --- tool orthogonal rake coefficient
K2 --- broaching tool blunt degree coefficient
K3 --- different cutting fluid coefficients
Refering to Fig. 1, Fig. 5 and Fig. 6, spline tooth 33 is provided with body 1, without independent chamfered teeth, in the spline tooth of spline tooth 33
Root 32 is provided with chamfer angle θ；
Chamfer angle θ=（180 °/number of teeth+workpiece chamfering angle）×2.
φ2：The maximum+2 of spline tooth chamfering diameter=workpiece path × chamfering work piece straight flange is long
φ1：Spline tooth root dia maximum -- it is typically designed to be slightly less than workpiece prepared hole footpath, is easy to manufacture, measures.
Workpiece chamfering angle is 45 °, chamfering work piece straight flange a length of 0.2, the number of teeth 57, path
φ 222.72+0.072 0, prepared hole footpath φ 222.32+0.06 0
Calculate：The maximum+2 of φ 2=workpiece paths × chamfering work piece straight flange is long
=（222.72+0.072）+2×0.2
= 222.792+0.4=φ223.192
φ1 =φ222
θ =（180 °/number of teeth+workpiece chamfering angle）×2
=（180°/57+45°）×2=96.3°
In order to manufacture the convenience of measurement, θ=100 ° are generally rounded.
Refering to Fig. 1 and Fig. 7, on transverse tooth thickness essence broach shell 7 is expanded, spline tooth tooth top is not involved in cutting, and rise per tooth is arranged in side edge,
Therefore flank must have relief angle, in order to fully extend the broaching tool life-span, side relief angle α is designed to 30 ' ~ 40 ' axial relief grinding shapings.
This big broaching tool employs spline and circular hole carries out thick, smart separate structure design, i.e., rough spline tooth using gradually into
Formula is broached, and finish draw spline tooth adopts profile broaching, is the bulk life time for extending broaching tool as far as possible, allows each section of cutting tooth of broaching tool
Benefit is all played as far as possible, and thick, smart broach shell adopts the assembling structure of replaceable sleeve cartridge type.
The expansion transverse tooth thickness essence broach shell of big broaching tool is spaced using involute teeth, round tooth, i.e., path centering, coaxial-type jump tooth
Structure, carries out the compound broaching of endoporus, profile of tooth, and this toothrow mode makes workpiece path and involute flank be almost in the same of broaching tool
One position, while be processed out, the impact of broaching machine kinematic accuracy and broaching tool linearity can be eliminated, the axiality of workpiece is by broaching tool
Round tooth is determined to the axiality of involute teeth cyclotomy.The spline tooth tooth top of the expansion transverse tooth thickness essence broach shell of big broaching tool is not involved in cutting,
Rise per tooth is arranged in side edge, therefore flank must have relief angle, and in order to fully extend the broaching tool life-span, side relief angle is designed to α=30 ' ~ 40 '
Axial relief grinding shaping.
The rough spline teeth portion of this big broaching tool, to form certain side relief angle, is subtracted using manufacturing and designing for back centre is raised
Friction behind little broaching tool cutter tooth side with workpiece, had both reduced the surface quality that cutting force in turn ensure that broaching.Big Broach Design into
Fabricated construction, is decomposed into front shank, rough dise knife set, rough spline teeth portion, finish draw broach shell and rear shank, cutting portion high-quality
High-speed steel, in front and back shank 9CrSi materials, broach body cylinder-like structure, to ensure that blade has good quenching degree, while can
Quenching distortion is reduced, can also mitigate broaching tool deadweight.
In sum, it is rough broach shell that broaching part of the invention is designed as three-stage structure, i.e. front portion, and centre is that spline is thick
Pull portion, rear portion is the expansion transverse tooth thickness essence broach shell for jumping toothing circular hole.Make it reduce the assembling link of broaching tool using three-stage structure, disappear
Except impact of the rigging error to broaching tool precision, without chamfering broach shell, processing is simple, and low cost, handling are easy, and cutting force is balanced,
Reliable in quality, high working efficiency and long service life.
Claims (5)
1. a kind of big broaching tool of a pulling shaping, including broach body（1）, pull end（6）, rear lug（9）And securing member, its feature exists
In：
The broach body of A, described big broaching tool（1）For cylinder-like structure, this three sections broaching structures are rough broach shell 2, jump tooth knot
The rough broach body 1 of the expansion transverse tooth thickness essence broach shell 7 of structure circular hole and spline, i.e. front portion is rough broach shell 2, and centre is the rough drawing of spline
Knife body 1, rear portion is the expansion transverse tooth thickness essence broach shell 7 for jumping toothing circular hole；
B, described pull end（6）, rear lug（9）It is separately positioned on broach body（1）Before and after in cylinder, and by front bolt（3）, it is flat
Key, rear bolt（8））And screw（4）Fastening；
C, described broach body（1）The rough broach shell of upper suit（2）, jump toothing circular hole expansion transverse tooth thickness essence broach shell（7）, pull end
（6）And rear lug（9）It is equipped with positioning spline（10）；For ensureing broaching tool assembly precision；
D, described broach body（1）It is provided with front broach teeth（22）With rear broach teeth（23）, the rough structure of spline is provided with flower
Key teeth root（32）And spline tooth（33）；The spline root portion（32）It is provided with chamfer angle θ.
2. the big broaching tool of a pulling shaping as claimed in claim 1, it is characterised in that described front broach teeth（22）Rise per tooth δ
1 be 0.05～0.08mm, rear broach teeth（23）Rise per tooth δ 2 be 0.06～0.09mm,
Parameters Optimal Design is carried out to broaching tool, segmentation is taken, is drawn the method for shelves, appropriate design rise per tooth, balanced cutting force, not
On the premise of increasing broach length, cutting force is controlled within 55 tons, it is ensured that broaching tool can normally broach on the broaching machine of 60 tonnages.
3. the big broaching tool of a pulling shaping as claimed in claim 1, it is characterised in that the spline in the rough structure of described spline
Root portion（32）On be provided with chamfer angle θ；Its chamfer angle θ=（180 °/number of teeth+workpiece chamfering angle）× 2,
By chamfer design in the root of spline broaching tooth, both ensure the processing and manufacturing of broaching tool, can guarantee that precision again, and broaching tool makes
With life-span length, the good product quality of broaching.
4. the big broaching tool of a pulling shaping as claimed in claim 1, it is characterised in that described broach body（1）Length is
2120mm～2620mm.
5. the big broaching tool of a pulling shaping as claimed in claim 1, it is characterised in that described rough broach shell（2）, jump toothing
The expansion transverse tooth thickness essence broach shell of circular hole（7）High-quality high-speed-steel structure, pull end are with the rough structure of spline（6）And rear lug（9）It is
Handle before and after made by 9CrSi materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611195798.5A CN106583858A (en) | 2016-12-22 | 2016-12-22 | Large broaching tool for one-step broaching forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611195798.5A CN106583858A (en) | 2016-12-22 | 2016-12-22 | Large broaching tool for one-step broaching forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106583858A true CN106583858A (en) | 2017-04-26 |
Family
ID=58602280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611195798.5A Pending CN106583858A (en) | 2016-12-22 | 2016-12-22 | Large broaching tool for one-step broaching forming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106583858A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672806A (en) * | 2018-05-30 | 2018-10-19 | 江阴市工具厂 | A kind of scraping broaching tool of Hardened gear face splined hole |
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| JPH0633627U (en) * | 1992-09-24 | 1994-05-06 | 株式会社不二越 | Broach for machining helical internal gear |
| US5396818A (en) * | 1992-04-03 | 1995-03-14 | New Venture Gear, Inc. | Method of making a wafer broaching tool |
| CN2801356Y (en) * | 2004-12-22 | 2006-08-02 | 哈尔滨第一工具有限公司 | Inner gear wheel fine drawing cutter of wheel edge speed reducer |
| CN201020573Y (en) * | 2007-03-14 | 2008-02-13 | 哈尔滨第一工具制造有限公司 | End-face trapezium spline broach |
| CN201361749Y (en) * | 2009-03-13 | 2009-12-16 | 株洲齿轮有限责任公司 | Internal broach used for gear |
| CN201361748Y (en) * | 2009-03-13 | 2009-12-16 | 株洲齿轮有限责任公司 | One-step forming big broach of annular gear |
| CN201361742Y (en) * | 2009-03-13 | 2009-12-16 | 株洲齿轮有限责任公司 | Big broach without chamfering sleeve |
| US20100196106A1 (en) * | 2009-01-30 | 2010-08-05 | Utica Enterprises, Inc. | Broach shaving apparatus |
| CN206484106U (en) * | 2016-12-22 | 2017-09-12 | 汉德车桥(株洲)齿轮有限公司 | A kind of big broaching tool of a pulling shaping |
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2016
- 2016-12-22 CN CN201611195798.5A patent/CN106583858A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5396818A (en) * | 1992-04-03 | 1995-03-14 | New Venture Gear, Inc. | Method of making a wafer broaching tool |
| JPH0633627U (en) * | 1992-09-24 | 1994-05-06 | 株式会社不二越 | Broach for machining helical internal gear |
| CN2801356Y (en) * | 2004-12-22 | 2006-08-02 | 哈尔滨第一工具有限公司 | Inner gear wheel fine drawing cutter of wheel edge speed reducer |
| CN201020573Y (en) * | 2007-03-14 | 2008-02-13 | 哈尔滨第一工具制造有限公司 | End-face trapezium spline broach |
| US20100196106A1 (en) * | 2009-01-30 | 2010-08-05 | Utica Enterprises, Inc. | Broach shaving apparatus |
| CN201361749Y (en) * | 2009-03-13 | 2009-12-16 | 株洲齿轮有限责任公司 | Internal broach used for gear |
| CN201361748Y (en) * | 2009-03-13 | 2009-12-16 | 株洲齿轮有限责任公司 | One-step forming big broach of annular gear |
| CN201361742Y (en) * | 2009-03-13 | 2009-12-16 | 株洲齿轮有限责任公司 | Big broach without chamfering sleeve |
| CN206484106U (en) * | 2016-12-22 | 2017-09-12 | 汉德车桥(株洲)齿轮有限公司 | A kind of big broaching tool of a pulling shaping |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672806A (en) * | 2018-05-30 | 2018-10-19 | 江阴市工具厂 | A kind of scraping broaching tool of Hardened gear face splined hole |
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Application publication date: 20170426 |