US20140182437A1 - Trimming die and punch thereof - Google Patents

Trimming die and punch thereof Download PDF

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Publication number
US20140182437A1
US20140182437A1 US13/916,912 US201313916912A US2014182437A1 US 20140182437 A1 US20140182437 A1 US 20140182437A1 US 201313916912 A US201313916912 A US 201313916912A US 2014182437 A1 US2014182437 A1 US 2014182437A1
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US
United States
Prior art keywords
trimming
die
punch
base assembly
fixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/916,912
Inventor
Bor-Tsuen Lin
Chun-Chih Kuo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Kaohsiung First University of Science and Technology
Original Assignee
National Kaohsiung First University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to TW101150945 priority Critical
Priority to TW101150945A priority patent/TWI522187B/en
Application filed by National Kaohsiung First University of Science and Technology filed Critical National Kaohsiung First University of Science and Technology
Assigned to NATIONAL KAOHSIUNG FIRST UNIVERSITY OF SCIENCE AND TECHNOLOGY reassignment NATIONAL KAOHSIUNG FIRST UNIVERSITY OF SCIENCE AND TECHNOLOGY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUO, CHUN-CHIH, LIN, BOR-TSUEN
Publication of US20140182437A1 publication Critical patent/US20140182437A1/en
Abandoned legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/02Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/14Dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/02Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16Shoulder or burr prevention, e.g. fine-blanking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/24Perforating, i.e. punching holes
    • B21D28/34Perforating tools; Die holders
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/748With work immobilizer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/929Tool or tool with support
    • Y10T83/9411Cutting couple type
    • Y10T83/9423Punching tool
    • Y10T83/9437Shear-type female tool

Abstract

A trimming die includes a first die base assembly, a second die base assembly, and a trimming punch. The first die base assembly includes a fixing portion; the second die base assembly is positioned opposite the first die base assembly; the second die base assembly includes a die cavity portion; the die cavity portion has a die cavity and a die cavity inner wall; the die cavity inner wall has a plurality of first slant grooves; the punch has a fixing end portion and a trimming end portion positioned opposite the fixing end portion; the fixing end portion is disposed at the fixing portion; the trimming end portion is positioned corresponding to the die cavity; a peripheral surface of the trimming end portion includes a plurality of second slant grooves. A trimming punch is also provided.

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • This application claims the benefit of Taiwan Patent Application No. 101150945, filed on Dec. 28, 2012, which is hereby incorporated by reference for all purposes as if fully set forth herein.
  • TECHNICAL FIELD
  • The disclosure relates to a die and a punch thereof, and particularly to a trimming die and a trimming punch thereof.
  • BACKGROUND
  • The recent decade witnesses a rapid development of the electronics industry, along with which the sales volume of consumer electronics such as cell phones and notebook computers rises significantly. In recent years, these products are developed following the trend of small volume, light weight, desirable strength, and easy heat dissipation, so the components thereof also need to be metalized and refined. Producing components using semiconductors or non-conventional process has the disadvantages of high equipment cost, restrictions on materials applied in the process, a small depth-to-width ratio, and difficulty in producing three-dimensional components.
  • The stamping process is one of the key technologies for mass production of metal components in the conventional manufacturing industry. Trimming, drawing and bending dies are widely applied throughout the entire stamping process for various purposes. The stamping process has the advantages of high production efficiency, material conservation, high precision, good mechanical properties of finished products, unrestricted material application, and simplified component design, and complies with the current environmental concept requirement of green industry. Hence, the application of stamping metal in a micro-component, which is referred to as micro-stamping, is attracting more and more attentions.
  • Referring to FIG. 1A and FIG. 1B, FIG. 1A is a local schematic view of a conventional trimming die before a trimming punch thereof performs a trimming operation on a blank; FIG. 1B is a local schematic view of a conventional trimming die in FIG. 1A when a trimming punch thereof is performing a trimming operation on a blank.
  • As shown in FIG. 1A and FIG. 1B, the trimming die 5 includes a first die base assembly (for example, an upper die base assembly) and a second die base assembly (for example, a lower die base assembly) positioned corresponding to the first die. A trimming punch 50 and a blank holder 51 are disposed on the first die base assembly; the second die base assembly includes a die block 52, and the die block has a die cavity 520.
  • When an operator wants to perform a trimming operation on a blank 53, the blank holder 51 and the die block 52 of the trimming die may be used to fix the blank 53 at a processing position, and then a downward trimming force F of the trimming punch 50 is used to accomplish the trimming operation on the blank 53 (for example, forming a round hole at a central part of the blank 53, or shearing a part of a side edge of the blank 53).
  • However, an external peripheral surface of the trimming punch 50 of the conventional trimming die 5 or an inner wall of the die cavity 520 of the die block 52 of the second die base assembly does not have a special micro-structural design, so the trimming processing quality of the blank 53 is not as good as expected.
  • SUMMARY
  • The disclosure provides a trimming die capable of improving trimming quality of a blank, and a trimming punch thereof.
  • Accordingly, the disclosure provides a trimming die, comprising a first die base assembly, a second die base assembly and a trimming punch, wherein the first die base assembly comprises a fixing portion; the second die base assembly is positioned opposite the first die base assembly; the second die base assembly comprises a die cavity portion; the die cavity portion has a die cavity and a die cavity inner wall; the die cavity inner wall has a plurality of first slant grooves; the trimming punch has a fixing end portion and a trimming end portion positioned opposite the fixing end portion; the fixing end portion is disposed at the fixing portion, the trimming end. portion is positioned corresponding to die cavity, and a peripheral surface of the trimming end portion comprises a plurality of second slant grooves.
  • In the trimming die according to the embodiment of the disclosure, the first die base assembly further comprises a bolt element and a blank holder positioned corresponding to the die cavity portion, wherein an end of the bolt element is disposed at the fixing portion, and another end of the bolt element is disposed at the blank holder; the first die base assembly and the second die base assembly further comprise a guide pillar therebetween; the first die base assembly further comprises a guide pillar lining corresponding to the guide pillar; the fixing portion further comprises a punch back plate, a punch fixing plate, and a fixing element that joins the punch back plate and the punch fixing plate; the fixing end portion of the trimming punch leans against the punch back plate and is positioned at the punch fixing plate; the die cavity portion is formed of a die block and a die set.
  • In the trimming die according to the embodiment of the disclosure, the first slant grooves are arranged at intervals.
  • In the trimming die according to the embodiment of the disclosure, the first slant grooves are in the shape of a column-shaped recess, a V-shaped recess or an arc-shaped recess.
  • In the trimming die according to the embodiment of the disclosure, the second slant grooves are arranged at intervals.
  • In the trimming die according to the embodiment of the disclosure, the second slant grooves have the same length.
  • In the trimming die according to the embodiment of the disclosure, the second slant grooves are in the shape of a column-shaped recess, a V-shaped recess or an arc-shaped recess.
  • The disclosure further provides a trimming punch, comprising a trimming end portion, wherein a peripheral surface of the trimming end portion comprises a plurality of slant grooves.
  • In the trimming punch according to the embodiment of the disclosure, the slant grooves are arranged at intervals.
  • In the trimming punch according to the embodiment of the disclosure, the slant grooves have the same length.
  • In the trimming punch according to the embodiment of the disclosure, the slant grooves are in the shape of a column-shaped recess, a V-shaped recess or an arc-shaped recess.
  • The disclosure is characterized in that the second slant grooves of the trimming punch can reduce the trimming force of the punch on the blank during the trimming operation, thereby improving the trimming quality of the blank.
  • BRIEF DESCRIPTION OF DRAWINGS
  • FIG. 1A is a local schematic view of a trimming die before a trimming punch thereof performs a trimming operation on a blank;
  • FIG. 1B is a local schematic view of a trimming die in FIG. 1A when a trimming punch thereof is performing a trimming operation on a blank;
  • FIG. 2A is a schematic view of a trimming die before a trimming punch thereof performs a trimming operation on a blank according to an embodiment of the disclosure;
  • FIG. 2B is a local schematic view of a trimming die in FIG. 2A when a trimming punch thereof is performing a trimming operation on a blank;
  • FIG. 2C is a schematic view of a trimming die in FIG. 2A after a trimming punch thereof performs a trimming operation on a blank; and
  • FIG. 3 is a schematic view of a trimming die in which grooves of a trimming punch thereof and grooves of a die cavity inner wall are cross slant grooves according to another embodiment of the disclosure.
  • DETAILED DESCRIPTION
  • To make the objectives, features, and characteristics of the disclosure more comprehensible, related embodiments of the disclosure are described in detail below with reference to the accompanying drawings.
  • Referring to FIG. 2A, FIG. 2A is a schematic view of a trimming die before a trimming punch thereof performs a trimming operation on a blank according to an embodiment of the disclosure. An open-die state of the trimming die 1 is shown in FIG. 2A. The trimming die 1 is used for performing a trimming operation on a bank 20 and includes a first die base assembly 11, a second die base assembly 12, and a trimming punch 13. In this embodiment, the first die base assembly 11 is used as an upper die base assembly; the second die base assembly 12 is used as a lower die base assembly. However, due to actual design requirements of the die, the disclosure is not limited to this pattern.
  • The first die base assembly 11 includes a fixing portion 110; the second die base assembly 12 is positioned opposite the first die base assembly 11. The second die base assembly 12 includes a die cavity portion 120; the die cavity portion 120 has a die cavity 121 and a die cavity inner wall W. A surface (a surface of an effective working area) of the die cavity inner wall W has a plurality of first slant grooves G1 (more than two first slant grooves G1). In this embodiment, the die cavity portion 120 is formed of a die block 120 a (a lower die block) and a die set 120 b (a lower die set). The blank 20 is arranged on the die cavity portion 120.
  • The trimming punch 13 is applied to the trimming die 1. The trimming punch 13 has a fixing end portion 131 and a trimming end portion 132 positioned opposite the fixing end portion 131. The fixing end portion 131 is disposed at the fixing portion 110; the trimming end portion 132 is positioned corresponding to the die cavity 121. An external peripheral surface of the trimming end portion 132 includes a plurality of second slant grooves G2 (more than two second slant grooves G2).
  • Specifically, the first die base assembly 11 further includes a bolt element 111 and a blank holder 112 positioned corresponding to a surface of the die cavity portion 120. An end of the bolt element 111 is disposed at the fixing portion 110; another end of the bolt element 111 is disposed at the blank holder 112. A spring (not shown) may be assembled at the bolt element 111, and the spring is located between the fixing portion 110 and the blank holder 112.
  • In addition, the first die base assembly 11 and the second die base assembly 12 further include a guide pillar 14 therebetween for guiding the opening or closing of the trimming die 1; the first die base assembly 11 further includes a guide pillar lining 140 corresponding to the guide pillar 14, so as to prevent the guide pillar 14 from directly contacting and thus damaging the first die base assembly 11.
  • The fixing portion 110 further includes a punch back plate 110 a, a punch fixing plate 110 b, and a fixing element 15 that joins the punch back plate 110 a and the punch fixing plate 110 b. The fixing end portion 131 of the trimming punch 13 leans against the punch back plate 110 a and is positioned at the punch fixing plate 110 b.
  • Referring to FIG. 2A to FIG. 2C at the same time, FIG. 2B is a local schematic view of a trimming die in FIG. 2A when a trimming punch thereof is performing a trimming operation on a blank; FIG. 2C is a schematic view of a trimming die in FIG. 2A after a trimming punch thereof performs a trimming operation on a blank.
  • As shown in FIG. 2B, the surface at the die cavity inner wall W has a plurality of first slant grooves G1, and these first slant grooves G1 are arranged at intervals. An external peripheral surface of the trimming end portion 132 of the trimming punch 13 has a plurality of second slant grooves G2. The second slant grooves G2 are arranged at intervals, and the second slant grooves G2 have the same length and form an effective working area.
  • When an operator wants to perform a trimming operation on a blank 20, the blank 20 may be placed on the die cavity portion 120. When the trimming die 1 is driven, the first die base assembly 11 is enabled to approach the second die base assembly 12 under the guide of the guide pillar 14. As shown in FIG. 2B, the blank 20 is fixed between the blank holder 112 and the die block 120 a.
  • At this time (as shown in FIG. 2B), while the trimming punch 13 is performing the trimming operation on the blank 20, the second slant grooves G2 on the peripheral surface of the trimming end portion 132 of the trimming punch 13 can reduce a trimming force of the trimming punch 13 on the blank 20; meanwhile, the first slant grooves G1 of the die cavity inner wall W can reduce a trimming force of the blank 20 on an inner side of the die cavity 121, thereby improving trimming quality of the blank 20. After the trimming operation is completed, the trimming die 1 turns to a close-die state (as shown in FIG. 2C).
  • Referring to FIG. 3, FIG. 3 is a schematic view of a trimming die in which grooves of a trimming punch thereof and grooves of a die cavity inner wall are cross slant grooves according to another embodiment of the disclosure.
  • As shown in FIG. 3, the first slant grooves G1 may be in the shape of a cross slant groove; and the second slant grooves G2 may also be in the shape of a cross slant groove. Definitely, in different designs, the first slant grooves G1 and the second slant grooves G2 may be column-shaped recesses, V-shaped recesses, arc-shaped recesses or recesses of other geometrical shapes (for example, recesses of irregular shapes); the shapes of the grooves are not limited to the disclosure of FIG. 3. The trimming processing quality of the blank 20 can also be improved by means of these patterns.
  • It should be noted that, although the trimming punch in the shape of a round column is taken as an example for description, in a practical trimming die, in order to cater for the trimming shape or other requirements of the blank, the trimming punch may also be in the shape of an elliptic column, a square column, a triangular column, and the like, and the shape is not limited to the disclosure of the above embodiment. Moreover, the slant grooves on the peripheral surface of the trimming end portion of the punch may also vary along with the shape of the trimming punch. In addition, the slant grooves (the first slant grooves and the second slant grooves) on the peripheral surface of the trimming end portion of the trimming punch and on the die cavity inner wall may also be applied to cutting faces of an upper cutter and a lower cutter of a shearing machine.
  • In conclusion, exemplary implementations or embodiments described above are used for illustrating the technical means adopted in the disclosure to solve the problem, and are not intended to limit the implementation scope of the disclosure. Equivalent changes and modifications made following the meaning of the scope of the patent application or according to the scope of the patent shall fall within the scope of the patent.

Claims (14)

What is claimed is:
1. A trimming die, comprising:
a first die base assembly, comprising a fixing portion;
a second die base assembly, positioned opposite the first die base assembly, wherein the second die base assembly comprises a die cavity portion; the die cavity portion has a die cavity and a die cavity inner wall; the die cavity inner wall has a plurality of first slant grooves; and
a trimming punch, having a fixing end portion and a trimming end portion positioned opposite the fixing end portion, wherein the fixing end portion is disposed at the fixing portion; the trimming end portion is positioned corresponding to the die cavity; and a peripheral surface of the trimming end portion comprises a plurality of second slant grooves.
2. The trimming die according to claim 1, wherein the first die base assembly further comprises a bolt element and a blank holder positioned corresponding to the die cavity portion; an end of the bolt element is disposed at the fixing portion, and another end of the bolt element is disposed at the blank holder.
3. The trimming die according to claim 2, wherein the first die base assembly and the second die base assembly further comprise a guide pillar therebetween; the first die base assembly further comprises a guide pillar lining corresponding to the guide pillar.
4. The trimming die according to claim 2, wherein the fixing portion further comprises a punch back plate, a punch fixing plate, and a fixing element that joins the punch back plate and the punch fixing plate; the fixing end portion of the trimming punch leans against the punch back plate and is positioned at the punch fixing plate.
5. The trimming die according to claim 2, wherein the die cavity portion is formed of a die block and a die set.
6. The trimming die according to claim 1, wherein the first slant grooves are arranged at intervals.
7. The trimming die according to claim 1, wherein the first slant grooves are in the shape of a column-shaped recess, a V-shaped recess or an arc-shaped recess.
8. The trimming die according to claim 1, wherein the second slant grooves are arranged at intervals.
9. The trimming die according to claim 1, wherein the second slant grooves have the same length.
10. The trimming die according to claim 1, wherein the second slant grooves are in the shape of a column-shaped recess, a V-shaped recess or an arc-shaped recess.
11. A trimming punch, comprising a trimming end portion, wherein a peripheral surface of the trimming end portion comprises a plurality of slant grooves.
12. The trimming punch according to claim 11, wherein the slant grooves are arranged at intervals.
13. The trimming punch according to claim 11, wherein the slant grooves have the same length.
14. The trimming punch according to claim 11, wherein the slant grooves are in the shape of a column-shaped recess, a V-shaped recess or an arc-shaped recess.
US13/916,912 2012-12-28 2013-06-13 Trimming die and punch thereof Abandoned US20140182437A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW101150945 2012-12-28
TW101150945A TWI522187B (en) 2012-12-28 2012-12-28 Punching die and its punch

Publications (1)

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US20140182437A1 true US20140182437A1 (en) 2014-07-03

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US13/916,912 Abandoned US20140182437A1 (en) 2012-12-28 2013-06-13 Trimming die and punch thereof

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CN (1) CN103909138B (en)
TW (1) TWI522187B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104959447A (en) * 2015-07-14 2015-10-07 武汉理工大学 Unbalanced load active balance precise stamping die structure
US20160145983A1 (en) * 2014-11-26 2016-05-26 Weatherford Technology Holdings, Llc Lift valve with bellow hydraulic protection and chatter reduction
CN105964757A (en) * 2016-07-19 2016-09-28 江西江铃底盘股份有限公司 Automobile drive axle housing body length-cutting and edge-cutting multi-station die
CN106001240A (en) * 2016-07-19 2016-10-12 江西江铃底盘股份有限公司 Trimming die for axle housing body of automobile drive axle
CN106180354A (en) * 2016-07-19 2016-12-07 江西江铃底盘股份有限公司 A kind of automobile drive axle housing body cuts long method for cutting edge

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CN104690155B (en) * 2015-04-01 2016-04-27 李英慧 Segmentation cutting type drift and process for stamping thereof
CN105235129B (en) * 2015-11-03 2018-06-01 东莞市誉铭新精密技术股份有限公司 Sheet forming injection mold
CN106313176B (en) * 2016-11-17 2019-02-26 厦门市海德龙电子股份有限公司 A kind of die set for directly going out type chamber and chain hole on carrier band

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US2226819A (en) * 1939-03-06 1940-12-31 Conn Ltd C G Method of making adjustable joints
US2674780A (en) * 1948-11-05 1954-04-13 Illinois Tool Works Die mechanism
US3230905A (en) * 1963-07-29 1966-01-25 Cherry Burrell Corp Tablet press design
US3289519A (en) * 1964-12-14 1966-12-06 Donato L Piccone Latch mechanism for die block of punch press
US3812698A (en) * 1973-03-05 1974-05-28 Intertherm Spin-flanging tool
US4194430A (en) * 1978-05-05 1980-03-25 Research Engineering & Manufacturing, Inc. Thread-forming screw with step taper
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US4543865A (en) * 1982-06-15 1985-10-01 Kramski Gmbh Prazisionswerkzeuge-Metallwaren Punch press tool for punching small holes in a strip of sheet metal, and obtaining small punched blanks
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US6604399B1 (en) * 2000-03-31 2003-08-12 Fujitsu Limited Stamping die for cutting and forming sheet material
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160145983A1 (en) * 2014-11-26 2016-05-26 Weatherford Technology Holdings, Llc Lift valve with bellow hydraulic protection and chatter reduction
US10161232B2 (en) * 2014-11-26 2018-12-25 Weatherford Technology Holdings, Llc Lift valve with bellow hydraulic protection and chatter reduction
CN104959447A (en) * 2015-07-14 2015-10-07 武汉理工大学 Unbalanced load active balance precise stamping die structure
CN105964757A (en) * 2016-07-19 2016-09-28 江西江铃底盘股份有限公司 Automobile drive axle housing body length-cutting and edge-cutting multi-station die
CN106001240A (en) * 2016-07-19 2016-10-12 江西江铃底盘股份有限公司 Trimming die for axle housing body of automobile drive axle
CN106180354A (en) * 2016-07-19 2016-12-07 江西江铃底盘股份有限公司 A kind of automobile drive axle housing body cuts long method for cutting edge

Also Published As

Publication number Publication date
CN103909138A (en) 2014-07-09
TW201424879A (en) 2014-07-01
CN103909138B (en) 2016-03-16
TWI522187B (en) 2016-02-21

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