CN104028621A - Cold stamping punch for automotive stamping parts - Google Patents

Cold stamping punch for automotive stamping parts Download PDF

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Publication number
CN104028621A
CN104028621A CN201410295688.0A CN201410295688A CN104028621A CN 104028621 A CN104028621 A CN 104028621A CN 201410295688 A CN201410295688 A CN 201410295688A CN 104028621 A CN104028621 A CN 104028621A
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CN
China
Prior art keywords
section
hole flanging
drift
punch
cold stamping
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.)
Pending
Application number
CN201410295688.0A
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Chinese (zh)
Inventor
张国营
刘圣祖
周露生
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.)
NANJING HUIDE MACHINERY CO Ltd
Original Assignee
NANJING HUIDE MACHINERY CO Ltd
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
Application filed by NANJING HUIDE MACHINERY CO Ltd filed Critical NANJING HUIDE MACHINERY CO Ltd
Priority to CN201410295688.0A priority Critical patent/CN104028621A/en
Publication of CN104028621A publication Critical patent/CN104028621A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a cold stamping punch for automotive stamping parts. The cold stamping punch comprises a cylindrical punch body, one end of the punch body is sequentially provided with a hole flanging section, a first transition connection section, a punching positioning section, a second transmission connection section and a conical guide section. The conical guide section is in a conical frustum shaped structure, the thin end of the conical frustum shaped structure of the conical guide section is provided with an arc transition chamfer, the punching positioning section and the hole flanging section are both in cylindrical structures, and outer diameters of the conical guide section, the punching positioning section and the hole flanging section are increased sequentially. The cold stamping punch for the automotive stamping parts has the advantages that by the aid of the hole flanging punch designed according to novel special technologies and subjected to special surface treatment, the quality problems of size precision and roughness of inner surfaces of flange holes can be effectively solved, the service life of the hole flanging punch can be prolonged to 200,000 times of punching, and cost on die maintenance is reduced.

Description

Automobile metal plate work cold stamping drift
Technical field
The present invention relates to a kind of automobile metal plate work cold stamping drift, belong to automobile metal plate work Cold pressing die field.
Background technology
The common flange hole technology drift that the punching of current domestic automobile metal plate work of the same trade adopts, after hole flanging, there will be the not contour and hole flanging punch short problem in service life in the limit of rough inner surface, poor dimensional precision, hole flanging in hole, conventionally drift uses 5,000 to 10,000 jig frequencies just need to scrap and more renews drift, not only increase the percent defective of product, but also increase the maintenance expense of drift, the waste enterprise resources of production.
Summary of the invention
Technical problem to be solved by this invention is, overcome the shortcoming of prior art, a kind of automobile metal plate work cold stamping drift is provided, solved that the inside surface roughness dimensional accuracy poor, aperture that punching press hole flanging occurs is unstable, the height on the limit of the hole flanging surrounding problems such as also service life not contour and hole flanging punch is short, reach the target that improves product hole flanging quality and the minimizing maintenance expense that extends drift service life.
In order to solve above technical problem, the invention provides a kind of automobile metal plate work cold stamping drift, comprise cylindrical drift body, be provided with in one end of described drift body and be provided with successively hole flanging section, First Transition linkage section, punching positioning section, the second transition linkage section and tapered guide section; Described tapered guide section is round table-like structure, and the taper end of the frustum cone structure of described tapered guide section has arc-shaped transition chamfering, and described punching positioning section and hole flanging section are cylindrical structure, and the external diameter of tapered guide section, punching positioning section and hole flanging section increases successively.
Aforesaid automobile metal plate work cold stamping drift, the cone angle of described tapered guide section is 30 °~45 °, and the tapered guide section of drift front end is carried out preliminary correcting location to product, and angle too small causes drift front end to be easily out of shape, the excessive location for drift of angle is difficult for, and increases the difficulty of Primary Location.
Aforesaid automobile metal plate work cold stamping drift, the diameter that is not more than drift body of described hole flanging section.
Aforesaid automobile metal plate work cold stamping drift, described First Transition linkage section and the second transition linkage section are arc-shaped transition chamfering, the resistance when reducing punching press, the smoothness on surface while improving hole flanging.
Further, aforesaid automobile metal plate work cold stamping drift, the surface of described hole flanging section, First Transition linkage section, punching positioning section, the second transition linkage section and tapered guide section all has the metallic carbide layer after treatment through TD, and its surface roughness is 0.16.
The processing of TD coating process is done on the surface of drift entirety by the present invention, makes drift matrix hardness reach 60HRC, and face coat hardness reaches 2500HV, and punch head surface is smooth like minute surface simultaneously, and surface roughness is 0.16, guarantees the roughness of the inner surface of hole flanging metapore.Because the punch head surface hardness after surface treatment is high and smooth, can effectively prevent that punch head surface, by plucking, reduces the maintain and replace of drift in hole flanging process.
The invention has the beneficial effects as follows:
The present invention adopts new special process design and the hole flanging punch of special surface processing, can effectively improve the quality problems such as hole flanging inside surface roughness, dimensional accuracy, can be brought up to 200,000 jig frequencies the service life of hole flanging punch, reduce the expense of mold repair maintenance simultaneously.
Brief description of the drawings
Fig. 1 is concrete structure schematic diagram of the present invention.
The state diagram of position one when Fig. 2 embodiment 1 punching press.
The state diagram of position two when Fig. 3 embodiment 1 punching press.
The state diagram of position three when Fig. 4 embodiment 1 punching press.
Detailed description of the invention
embodiment 1
A kind of automobile metal plate work cold stamping drift that the present embodiment provides, structure as shown in Figure 1, comprise cylindrical drift body, be provided with in one end of drift body 5 and be provided with successively hole flanging section 1, First Transition linkage section 2, punching positioning section 3, the second transition linkage section 2 ' and tapered guide section 4, the cone angle of tapered guide section is 34 °, and First Transition linkage section and the second transition linkage section are arc-shaped transition chamfering; Tapered guide section is round table-like structure, and the taper end of the frustum cone structure of tapered guide section has arc-shaped transition chamfering, and punching positioning section and hole flanging section are cylindrical structure, and the external diameter of tapered guide section, punching positioning section and hole flanging section increases successively; The surface of hole flanging section, First Transition linkage section, punching positioning section, the second transition linkage section and tapered guide section all has the metallic carbide layer after treatment through TD, and its surface roughness is 0.16.
Front end taper boot segment is made tapered guide drift and is accurately located; The size of punching positioning section make with product hole flanging place on the bottom outlet gone out of operation measure-alike, accurately positioning product; Hole flanging section size is accomplished the required hole flanging size of product drawing, guarantees that hole flanging size is qualified; First Transition linkage section and the second transition linkage section connect for the transition between each section, all adopt the smooth connection of circular arc.The processing of TD coating process is done on the surface of drift entirety, makes drift matrix hardness reach 60HRC, and face coat hardness reaches 2500HV, and punch head surface is smooth like minute surface simultaneously, guarantees the roughness of the inner surface of hole flanging metapore.Because the punch head surface hardness after surface treatment is high and smooth, can effectively prevent that punch head surface, by plucking, reduces the maintain and replace of drift in hole flanging process.In addition. on punch structure size design and surface-treated basis, coordinate again the size of making hole flanging die, rationally control the gap of hole flanging punch and die, the gap that makes hole flanging punch and die is sheet metal thickness 70 percent, guarantees that the limit after hole flanging can be perpendicular to pressing sheet material.
In position a period of time of Fig. 2, hole flanging punch is by basic product, and the tapering part of drift front end carries out preliminary correcting location to product.In the time that drift arrives the position two of Fig. 3, the punching positioning section part of drift front end enters in the bottom outlet of operation punching before product, accurately correcting product, and the surrounding that prevents from placing because of product the hole flanging metapore causing not in place is not contour; In the time that drift arrives the position three of Fig. 4, complete hole flanging, drift exits die with mould motion, takes out product, completes punching course.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.

Claims (5)

1. automobile metal plate work cold stamping drift, comprises cylindrical drift body, it is characterized in that: be provided with in one end of described drift body and be provided with successively hole flanging section, First Transition linkage section, punching positioning section, the second transition linkage section and tapered guide section; Described tapered guide section is round table-like structure, and the taper end of the frustum cone structure of described tapered guide section has arc-shaped transition chamfering, and described punching positioning section and hole flanging section are cylindrical structure, and the external diameter of tapered guide section, punching positioning section and hole flanging section increases successively.
2. according to the automobile metal plate work cold stamping drift described in claim 1, it is characterized in that: the cone angle of described tapered guide section is 30 °~45 °.
3. according to the automobile metal plate work cold stamping drift described in claim 1, it is characterized in that: described hole flanging section diameter is not more than the diameter of drift body.
4. according to the automobile metal plate work cold stamping drift described in claim 1, it is characterized in that: described First Transition linkage section and the second transition linkage section are arc-shaped transition chamfering.
5. according to the automobile metal plate work cold stamping drift described in claim 1, it is characterized in that: the surface of described hole flanging section, First Transition linkage section, punching positioning section, the second transition linkage section and tapered guide section all has the metallic carbide layer after treatment through TD, and its surface roughness is 0.16.
CN201410295688.0A 2014-06-26 2014-06-26 Cold stamping punch for automotive stamping parts Pending CN104028621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410295688.0A CN104028621A (en) 2014-06-26 2014-06-26 Cold stamping punch for automotive stamping parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410295688.0A CN104028621A (en) 2014-06-26 2014-06-26 Cold stamping punch for automotive stamping parts

Publications (1)

Publication Number Publication Date
CN104028621A true CN104028621A (en) 2014-09-10

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CN201410295688.0A Pending CN104028621A (en) 2014-06-26 2014-06-26 Cold stamping punch for automotive stamping parts

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CN (1) CN104028621A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105149453A (en) * 2015-09-23 2015-12-16 无锡市中捷减震器有限公司 Cold punching device applied to integrated process of hole-flanging and chamfering
CN110732591A (en) * 2019-10-31 2020-01-31 宁波奥克斯厨电制造有限公司 punch head structure and punching method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60227930A (en) * 1984-04-25 1985-11-13 Matsushita Electric Ind Co Ltd Burring working method
FR2784850A1 (en) * 1998-10-20 2000-04-21 Guy Neyret Method for precise attachment of first/second printed circuit boards using punch mechanisms inserted into precise diameter board holes and tapered punch section hole, lower punch providing riveting action.
CN201105301Y (en) * 2007-10-01 2008-08-27 绵阳新晨动力机械有限公司 Combined punch
JP2009279642A (en) * 2008-05-26 2009-12-03 Hitachi Appliances Inc Burring metallic mold, burring punch, and burring method
CN201693060U (en) * 2010-06-02 2011-01-05 福州鑫威电器有限公司 Male mould of soft metal piece inner hole extruding and fine blanking die
CN202438612U (en) * 2012-02-20 2012-09-19 福建福模精密技术有限公司 Flanging and once molding punch without scrap generation
CN203917582U (en) * 2014-06-26 2014-11-05 南京惠德机械有限公司 A kind of automobile metal plate work cold stamping drift

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60227930A (en) * 1984-04-25 1985-11-13 Matsushita Electric Ind Co Ltd Burring working method
FR2784850A1 (en) * 1998-10-20 2000-04-21 Guy Neyret Method for precise attachment of first/second printed circuit boards using punch mechanisms inserted into precise diameter board holes and tapered punch section hole, lower punch providing riveting action.
CN201105301Y (en) * 2007-10-01 2008-08-27 绵阳新晨动力机械有限公司 Combined punch
JP2009279642A (en) * 2008-05-26 2009-12-03 Hitachi Appliances Inc Burring metallic mold, burring punch, and burring method
CN201693060U (en) * 2010-06-02 2011-01-05 福州鑫威电器有限公司 Male mould of soft metal piece inner hole extruding and fine blanking die
CN202438612U (en) * 2012-02-20 2012-09-19 福建福模精密技术有限公司 Flanging and once molding punch without scrap generation
CN203917582U (en) * 2014-06-26 2014-11-05 南京惠德机械有限公司 A kind of automobile metal plate work cold stamping drift

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105149453A (en) * 2015-09-23 2015-12-16 无锡市中捷减震器有限公司 Cold punching device applied to integrated process of hole-flanging and chamfering
CN110732591A (en) * 2019-10-31 2020-01-31 宁波奥克斯厨电制造有限公司 punch head structure and punching method

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Application publication date: 20140910

RJ01 Rejection of invention patent application after publication