CN204276647U - Reduce hot forming steel plate pierce punch dull die - Google Patents
Reduce hot forming steel plate pierce punch dull die Download PDFInfo
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- CN204276647U CN204276647U CN201420765093.2U CN201420765093U CN204276647U CN 204276647 U CN204276647 U CN 204276647U CN 201420765093 U CN201420765093 U CN 201420765093U CN 204276647 U CN204276647 U CN 204276647U
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Abstract
The utility model relates to a kind of reduction hot forming steel plate pierce punch dull die, comprise die shoe and upper bolster, upper bolster is fixedly connected on press slide, and press slide is driven by press and moves up and down, upper bolster fixes drift, and upper bolster lower surface connects binder block; Fixing lower punching die case on described die shoe, positioning workpieces on die shoe; It is characterized in that: the lower end of described drift arranges cutting edge, cutting edge in the shape of a spiral.The gradient of described helical form cutting edge is 0.5 ~ 50; The pitch of described helical form cutting edge is 3 ~ 8 times of workpiece material thickness.For circular punching, cutting edge foremost with absorption surface time, be positioned on the circular camber line of punching; For special-shaped punching, cutting edge foremost with absorption surface time, be positioned at the mid point of straightway in punching or the midpoint of level and smooth camber line.The utility model does not increase extra cost and does not lose production efficiency yet, effectively reduces the wearing and tearing of drift, extends drift service life.
Description
Technical field
The utility model relates to and a kind of reduces hot forming steel plate pierce punch dull die, and the punching die of especially a kind of high strength after hot forming process and ultrahigh-strength steel plates, belongs to the separation technology field of hot forming steel plate.
Background technology
High-strength steel sheet intensity is high, particularly there is higher comprehensive mechanical property in normalizing or normalizing tempered condition, the application of high-strength steel sheet is the effective means simultaneously guaranteeing lightweight and crashworthiness, is therefore widely used in the construction industry fields such as large ship, bridge, power station equipment, middle high-pressure boiler, high-pressure bottle, rolling stock, hoisting machinery.And hot forming steel plate is as a kind of Newly Sprouted Things, its production technology is different from common high-strength steel sheet, the production technology of hot forming steel plate generally includes shaping and two stages of quench cooled, wherein, shaping stage needs at high temperature once stamping by mould, quench cooled stage needs cool rapidly by controlling certain cooling velocity, thus steel plate is occurred from austenite microstructure to the transformation of martensite microstructure, obtain high intensity and hardness thus, for common boron steel, after hot forming process, its intensity reaches about 1500Mpa.The tensile strength of general high-strength steel sheet is at about 400MPa ~ 450MPa, and namely tensile strength reached 500 MPa ~ 800MPa before hot forming heat steel, heating then can be increased to 1300 ~ 1600 MPa after being shaped, its intensity is 3 ~ 4 times of rolled products of ordinary high-strength steel, its hardness is only second to pottery, but there is the toughness of steel, for common hot forming boron steel steel plate, intensity reaches 1500MPa, percentage elongation is about 5%, considerably beyond the high-strength steel of general significance, its separating technology difficulty is far away higher than general steel plate and common high-strength steel steel plate.
For the punching of hot forming steel plate, due to the intensity of steel plate own and hardness very high, drift wearing and tearing are very serious, finally produce punching burr, affect workpiece quality.For this reason, conventional method is the sintered steel using high rigidity, even on the basis of sintered steel, increase the process for treating surface such as TD, PVD coating, the cost of drift becomes very expensive thus, and the life-span upgrading amplitude of drift not obvious, usually 5,000 ~ 20,000 jig frequency still needs to change drift.
Can be found by hydrostatic pressure when analyzing punching, cause drift wear and tear very serious main cause be punching after workpiece aperture be less than drift size, thus depart from before workpiece at drift, by workpiece, tightly " hoop " firmly.And workpiece punching back aperture is less than drift size, basic reason is, during punching, drift has the radial power to workpiece extruding along aperture, workpiece radial resilience along aperture after punching is broken, thus makes aperture be less than drift size, and by drift, tightly " hoop " firmly.And slight relative to deburring wearing and tearing, punching serious wear, mainly because it is closed curve, has significantly increased the weight of this radial resilience to the anti-constraint of drift radial pull.Drift solutions all at present is all confined to the performance how improving drift material, and does not fundamentally consider how to alleviate and even eliminate this radial resilience.
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art, there is provided a kind of and reduce hot forming steel plate pierce punch dull die, not increasing under the prerequisite that extra cost do not lose production efficiency yet, effectively reducing the wearing and tearing of drift, extending drift service life.
According to the technical scheme that the utility model provides, described reduction hot forming steel plate pierce punch dull die, comprise die shoe and upper bolster, upper bolster is fixedly connected on press slide, press slide is driven by press and moves up and down, upper bolster fixes drift, and upper bolster lower surface connects binder block; Fixing lower punching die case on described die shoe, positioning workpieces on die shoe; It is characterized in that: the lower end of described drift arranges cutting edge, cutting edge in the shape of a spiral.
Further, the gradient of described helical form cutting edge is 0.5 ~ 50; The pitch of described helical form cutting edge is 3 ~ 8 times of workpiece material thickness.
Further, for circular punching, cutting edge foremost with absorption surface time, be positioned on the circular camber line of punching; For special-shaped punching, cutting edge foremost with absorption surface time, be positioned at the mid point of straightway in punching or the midpoint of level and smooth camber line.
Further, described drift material selects cold work tool steel SKD11, D2, high-speed steel or sintered steel.
Further, keep gap between the punching of described drift and lower punching die case, this gap is 5% ~ 15% of thickness of workpiece.
Further, described upper bolster is connected with binder block elasticity.
The utility model has following technique effect:
(1) essence of the present utility model is for radial resilience during closed curve punching, proposes the solution how reducing radial resilience.Because helical cutting edge during punching shears workpiece gradually, the stress of workpiece material inside obtains gradually, uniformly discharging, during drift punching, the power of radial compression workpiece is disperseed, thus counteract the elastic deformation that workpiece material produces because of drift radial compression to a great extent, after punching completes, springback capacity significantly reduces, after workpiece punching, " hoop " is lived the phenomenon of drift and is fundamentally alleviated, thus finally reduces the wearing and tearing of drift.No matter adopt the drift of which kind of material, drift of the present utility model is all much better than the drift service life of not carrying out pre-punched hole process program in service life;
(2) the utility model cutting edge shears workpiece gradually, and implement point cantact, impulsive force is not concentrated, and reduces the wearing and tearing to drift.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the I enlarged drawing of Fig. 1.
Fig. 3 is the structural representation of described drift.
Fig. 4 is the side view of Fig. 3.
Detailed description of the invention
Below in conjunction with concrete accompanying drawing, the utility model is described in further detail.
As shown in Figure 1 to 4: described reduction hot forming steel plate pierce punch dull die comprises die shoe 1, lower punching die case 2, workpiece 3, upper bolster 4, drift 5, binder block 6, cutting edge 7 etc.
As shown in Figure 1, the utility model comprises die shoe 1 and upper bolster 4, and upper bolster 4 is fixedly connected on press slide, press slide is driven by press and moves up and down, upper bolster 4 is fixed drift 5, and upper bolster 4 lower surface connects binder block 6, and upper bolster 4 is connected with binder block 6 elasticity; Fixing lower punching die case 2 on described die shoe 1, positioning workpieces 3 on die shoe 1; As shown in Figure 3, Figure 4, the lower end of described drift 5 arranges cutting edge 7, cutting edge 7 in the shape of a spiral, during punching press, helical form cutting edge 7 gradually with absorption surface;
The gradient of described helical form cutting edge 7 designs according to the aperture of machining hole required on workpiece 3 and material thickness, is preferably 0.5 ~ 50; The pitch of described helical form cutting edge 7 is 3 ~ 8 times of workpiece 3 material thickness;
For circular punching, any point that the circular camber line in punching can be selected foremost of cutting edge 7; For special-shaped punching, the mid point of straightway or the midpoint of level and smooth camber line in the preferred foremost punching of cutting edge 7;
Described drift 5 material selects high-quality cold work tool steel SKD11, D2, high-speed steel, sintered steel etc., also can carry out the surface treatments such as coating;
Keep gap between the punching of described drift 5 and lower punching die case 2, this gap is 5% ~ 15% of workpiece 3 thickness.
Embodiment one: a kind of punching technology of boron steel steel plate, the material of steel plate: boron steel 22MnB5, expects thick 1.6mm, length 400mm, wide 200mm, and institute's punching is circular hole, and diameter is 10mm; As shown in Figure 1 and Figure 2, above-mentioned workpiece specifically processes process in the following manner: drift foremost cutting edge in the shape of a spiral, during punching press in the shape of a spiral gradually with absorption surface, wherein, drift material selection sintered steel, hardness HRC61 ± degree, helical cutting edge gradient is 1.5 degree.
Embodiment two: a kind of punching technology of boron steel steel plate, this workpiece is automobile B post, and the material of steel plate: boron steel 22MnB5, expects thick 1.2mm, length 1250mm, wide 430mm, and institute's punching is circular hole, and diameter is 12mm; Above-mentioned workpiece specifically processes process in the following manner: pierce punch foremost cutting edge in the shape of a spiral, during punching press in the shape of a spiral gradually with absorption surface, wherein, material selection sintered steel, hardness HRC61 ± degree, helical cutting edge gradient is 1.8 degree.
Claims (6)
1. one kind reduces hot forming steel plate pierce punch dull die, comprise die shoe (1) and upper bolster (4), upper bolster (4) is fixedly connected on press slide, press slide is driven by press and moves up and down, at the upper fixing drift (5) of upper bolster (4), upper bolster (4) lower surface connects binder block (6); At the upper fixing lower punching die case (2) of described die shoe (1), the upper positioning workpieces (3) of die shoe (1); It is characterized in that: the lower end of described drift (5) arranges cutting edge (7), and cutting edge (7) in the shape of a spiral.
2. reduction hot forming steel plate pierce punch dull die as claimed in claim 1, is characterized in that: the gradient of described helical form cutting edge (7) is 0.5 ~ 50; The pitch of described helical form cutting edge (7) is 3 ~ 8 times of workpiece (3) material thickness.
3. as claimed in claim 1 reduce hot forming steel plate pierce punch dull die, it is characterized in that: for circular punching, during the contacting with workpiece (3) foremost of cutting edge (7), be positioned on the circular camber line of punching; For special-shaped punching, during the contacting with workpiece (3) foremost of cutting edge (7), be positioned at the mid point of straightway in punching or the midpoint of level and smooth camber line.
4. reduction hot forming steel plate pierce punch dull die as claimed in claim 1, is characterized in that: described drift (5) material selects cold work tool steel SKD11, D2, high-speed steel or sintered steel.
5. reduction hot forming steel plate pierce punch dull die as claimed in claim 1, it is characterized in that: keep gap between the punching of described drift (5) and lower punching die case (2), this gap is 5% ~ 15% of workpiece (3) thickness.
6. reduction hot forming steel plate pierce punch dull die as claimed in claim 1, is characterized in that: described upper bolster (4) is connected with binder block (6) elasticity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420765093.2U CN204276647U (en) | 2014-12-08 | 2014-12-08 | Reduce hot forming steel plate pierce punch dull die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420765093.2U CN204276647U (en) | 2014-12-08 | 2014-12-08 | Reduce hot forming steel plate pierce punch dull die |
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| CN204276647U true CN204276647U (en) | 2015-04-22 |
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| CN201420765093.2U Active CN204276647U (en) | 2014-12-08 | 2014-12-08 | Reduce hot forming steel plate pierce punch dull die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104438584A (en) * | 2014-12-08 | 2015-03-25 | 无锡朗贤汽车组件研发中心有限公司 | Die for reducing abrasion of hot-formed steel plate punching punch |
-
2014
- 2014-12-08 CN CN201420765093.2U patent/CN204276647U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104438584A (en) * | 2014-12-08 | 2015-03-25 | 无锡朗贤汽车组件研发中心有限公司 | Die for reducing abrasion of hot-formed steel plate punching punch |
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214115 Hongda Road, Wuxi City, Jiangsu Province, No. 111 Patentee after: Wuxi Lang Xian lightweight Polytron Technologies Inc Address before: 214115 Hongda Road, Wuxi City, Jiangsu Province, No. 111 Patentee before: Wuxi Co., Ltd of Lang Xian motor vehicle assembly research and development centre |
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| CP01 | Change in the name or title of a patent holder |