CN104438583A - Die capable of reducing abrasion of punch head of thermoformed steel plate - Google Patents
Die capable of reducing abrasion of punch head of thermoformed steel plate Download PDFInfo
- Publication number
- CN104438583A CN104438583A CN201410740220.8A CN201410740220A CN104438583A CN 104438583 A CN104438583 A CN 104438583A CN 201410740220 A CN201410740220 A CN 201410740220A CN 104438583 A CN104438583 A CN 104438583A
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- China
- Prior art keywords
- drift
- die
- steel plate
- punching
- hot forming
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
- B21D28/265—Perforating, i.e. punching holes in sheets or flat parts with relative movement of sheet and tools enabling the punching of holes in predetermined locations of the sheet, e.g. holes punching with template
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
The invention relates to a die capable of reducing abrasion of a punch head of a thermoformed steel plate. The die comprises a lower die base and an upper die base, wherein the upper die base is fixedly connected to a press slide; the press slide is driven by a press to move up and down; the punch head is fixed to the upper die base; a material pressing block is connected to the lower surface of the upper die base; a female die sleeve is fixed to the lower die base; a workpiece is positioned on the lower die base; the die is characterized in that a step protruding out of the lower end surface of the punch head is arranged at the lower end of the punch head; the edge of the step is positioned on the inner side of the cutting edge of the punch head; the outer circumferential surface of the step is perpendicular to the lower end surface of the punch head; the cross section area of the step is smaller than that of a punch hole. According to the die, the abrasion of the punch head is effectively reduced and the service life of the punch head is prolonged on the premise of not increasing additional cost and not reducing production efficiency.
Description
Technical field
The present invention relates to one and can reduce hot forming steel plate pierce punch dull die, 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 object of the invention is to overcome the deficiencies in the prior art, there is provided one can 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 technical scheme provided by the invention, describedly can reduce 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, and upper bolster fixes drift, and upper bolster lower surface connects binder block, anchor die sleeve on die shoe, positioning workpieces on die shoe; It is characterized in that: the lower end of described drift arranges the step protruding from drift lower surface, and the edge of step is positioned at the inner side of punch edge cutting edge, and the outer circumference surface of step is perpendicular to the lower surface of drift.
Further, the cross-sectional area of described step is less than the cross section face of punching.
Further, when punching is circular hole, the cross section of step is circular, and the distance between step and punch edge cutting edge is 0.2 ~ 5mm.
Further, when punching is irregularly-shaped hole, the shape of cross section of step is consistent with punching shape, or is the circle that the center of circle and punch center overlap; Distance between described step and punch edge cutting edge is 0.2 ~ 5mm.
Further, the height of described step is 3 ~ 5mm.
Further, the periphery of described step is the cambered surface of plane or indent, and cambered surface height is 0.2 ~ 2.8mm.
Further, the material of described drift selects cold work tool steel SKD11, D2, high-speed steel or sintered steel.
Further, keep gap between described drift and the punching of die case, this gap is 5% ~ 15% of thickness of workpiece.
The present invention has following technique effect:
(1) essence of the present invention is for radial resilience during closed curve punching, proposes the solution how reducing radial resilience.Owing to carrying out step pre-subpunch one aperture before punching, workpiece is Stress Release after breaking in this place, material tails off simultaneously, during second step drift punching (i.e. workpiece finally need aperture size), the material constraint reaction force suffered by power of radial compression workpiece diminishes, 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 invention is all much better than the drift service life of not carrying out pre-punched hole process program in service life;
(2) for special-shaped punching, the circle that the present invention adopts step profile section to overlap with special-shaped punch center, process convenient, cost is more economically;
(3) the present invention adopts plane as the outer surface of step, and process convenient, cost more economically.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the state diagram of drift edge contacts workpiece.
Fig. 3 is the I enlarged drawing of Fig. 2.
Fig. 4 is the schematic diagram after punching.
Fig. 5 is the structural representation of described drift.
Fig. 6 is the upward view of Fig. 5.
Detailed description of the invention
Below in conjunction with concrete accompanying drawing, the invention will be further described.
As shown in Fig. 1 ~ Fig. 6: as described in can reduce hot forming steel plate pierce punch dull die and comprise die shoe 1, die case 2, workpiece 3, upper bolster 4, drift 5, binder block 6, cutting edge 7, step 8 etc.
As shown in Figure 1, the present invention includes 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, 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; Anchor die sleeve 2 on described die shoe 1, positioning workpieces 3 on die shoe 1; As shown in Figure 5, Figure 6, the lower end of described drift 5 arranges the step 8 protruding from drift 5 lower surface, the edge of step 8 is positioned at the inner side of drift 5 edge roundness 7, and the outer circumference surface of step 8 is perpendicular to the lower surface of drift 5, and when punching, step 8 first touches workpiece 3 than the cutting edge 7 of drift 5;
Described step 8 cross section, height and outer circumference surface shape, must carry out technological design according to workpiece aperture and material thickness, and general principle is control step 8 first to touch than cutting edge 7 in the process of workpiece 3, workpiece 3 break apart under the effect of step 8 edge roundness; Subsequently, drift 5 continues descending, and drift 5 edge roundness 7 contacts workpiece 3, and under the acting in conjunction of drift 5 edge roundness 7 and die case 2 cutting edge, workpiece 3 breaks along the sideline of punching, completes punching.
The cross-sectional area of described step 8 is less than the cross-sectional area of punching, and the edge of step 8 is positioned at the inner side of drift 5 edge roundness 7; When punching is circular hole, the cross section of step 8 is circular, and the distance between step 8 from drift 5 edge roundness 7 is different and variant with material thickness according to workpiece aperture, is preferably 0.2 ~ 5mm; When punching is irregularly-shaped hole, the cross section of step 8 both can be the irregularly-shaped hole consistent with punching shape, also can be the circle that the center of circle and punch center overlap, the distance between step 8 from drift 5 edge roundness 7 be different and variant with material thickness according to workpiece aperture, is preferably 0.2 ~ 5mm.
The height of described step 8 is different and variant with material thickness according to workpiece aperture, preferably 3 ~ 5mm.
The periphery of described step 8 can be the cambered surface for plane or indent, and cambered surface height is different and variant with material thickness according to workpiece aperture, is preferably 0.2 ~ 2.8mm; Consider processing technology, preferred planar.
The material of described drift 5, 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 described drift 5 and the punching of 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 workpiece: 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 to 4, above-mentioned workpiece specifically processes process in the following manner: drift arranges step foremost, during punching press step foremost first with absorption surface, workpiece break apart under the effect of step edge cutting edge; Subsequently, drift continues descending, punch edge edge contacts workpiece, and under the acting in conjunction of punch edge cutting edge and concave mould sleeve cutting edge, workpiece breaks along the limit silk of punching, completes punching.Wherein, the material selection sintered steel of drift, hardness HRC61 ± degree, the diameter of step is 6mm, is highly 2mm.
Embodiment two: a kind of punching technology of boron steel steel plate, this workpiece is automobile B post.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;
As shown in Figure 1 to 4, above-mentioned workpiece specifically processes process in the following manner: drift arranges step foremost, during punching press step foremost first with absorption surface, workpiece break apart under the effect of step edge cutting edge; Subsequently, drift continues descending, punch edge edge contacts workpiece, and under the acting in conjunction of punch edge cutting edge and concave mould sleeve cutting edge, workpiece breaks along the limit silk of punching, completes punching.Wherein, the material selection sintered steel of drift, hardness HRC61 ± degree, the diameter of step is 8mm, is highly 1.5mm.
Claims (8)
1. one kind can reduce 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 anchor die sleeve (2) of die shoe (1), and the upper positioning workpieces (3) of die shoe (1); It is characterized in that: the lower end of described drift (5) arranges the step (8) protruding from drift (5) lower surface, the edge of step (8) is positioned at the inner side of drift (5) edge roundness (7), and the outer circumference surface of step (8) is perpendicular to the lower surface of drift (5).
2. can reduce hot forming steel plate pierce punch dull die as claimed in claim 1, it is characterized in that: the cross-sectional area of described step (8) is less than the cross section face of punching.
3. can reduce hot forming steel plate pierce punch dull die as claimed in claim 2, it is characterized in that: when punching is circular hole, the cross section of step (8) is circular, and the distance between step (8) and drift (5) edge roundness (7) is 0.2 ~ 5mm.
4. can reduce hot forming steel plate pierce punch dull die as claimed in claim 2, it is characterized in that: when punching is irregularly-shaped hole, the shape of cross section of step (8) is consistent with punching shape, or is the circle that the center of circle and punch center overlap; Distance between described step (8) and drift (5) edge roundness (7) is 0.2 ~ 5mm.
5. can reduce hot forming steel plate pierce punch dull die as claimed in claim 1, it is characterized in that: the height of described step (8) is 3 ~ 5mm.
6. can reduce hot forming steel plate pierce punch dull die as claimed in claim 1, it is characterized in that: the periphery of described step (8) is the cambered surface of plane or indent, and cambered surface height is 0.2 ~ 2.8mm.
7. can reduce hot forming steel plate pierce punch dull die as claimed in claim 1, it is characterized in that: the material of described drift (5) selects cold work tool steel SKD11, D2, high-speed steel or sintered steel.
8. can reduce 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 die case (2), this gap is 5% ~ 15% of workpiece (3) thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410740220.8A CN104438583A (en) | 2014-12-08 | 2014-12-08 | Die capable of reducing abrasion of punch head of thermoformed steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410740220.8A CN104438583A (en) | 2014-12-08 | 2014-12-08 | Die capable of reducing abrasion of punch head of thermoformed steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104438583A true CN104438583A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410740220.8A Pending CN104438583A (en) | 2014-12-08 | 2014-12-08 | Die capable of reducing abrasion of punch head of thermoformed steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104438583A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583534A (en) * | 2016-12-22 | 2017-04-26 | 广东长盈精密技术有限公司 | CNC cutting tool and CNC machining method |
| CN108311581A (en) * | 2018-03-23 | 2018-07-24 | 无锡臻致精工科技有限公司 | Hole expansion die and expanding method |
| CN111729969A (en) * | 2020-06-11 | 2020-10-02 | 陈亚秀 | Metal forming stamping die |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2180184A (en) * | 1985-09-16 | 1987-03-25 | Da Hsiung Peng | A tungsten carbide tip punch and a method for producing the same |
| CN1038416A (en) * | 1988-06-08 | 1990-01-03 | 索尼·斯尼得 | The modified long wearing punch |
| CN2223150Y (en) * | 1995-05-17 | 1996-03-27 | 马传佩 | Composite punch |
| JPH08232944A (en) * | 1995-02-28 | 1996-09-10 | Fuji Kiko Co Ltd | Manufacture, forming die and forming punch of metallic sheet bearing part |
| US5992280A (en) * | 1992-12-07 | 1999-11-30 | Fuji Photo Film Co., Ltd. | Perforator for metal plate |
| CN101653788A (en) * | 2009-09-16 | 2010-02-24 | 哈尔滨工业大学 | High aspect ratio micro-hole impact extrusion compound molding device and method |
| CN204276648U (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | A kind of reduction hot forming steel plate pierce punch dull die |
-
2014
- 2014-12-08 CN CN201410740220.8A patent/CN104438583A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2180184A (en) * | 1985-09-16 | 1987-03-25 | Da Hsiung Peng | A tungsten carbide tip punch and a method for producing the same |
| CN1038416A (en) * | 1988-06-08 | 1990-01-03 | 索尼·斯尼得 | The modified long wearing punch |
| US5992280A (en) * | 1992-12-07 | 1999-11-30 | Fuji Photo Film Co., Ltd. | Perforator for metal plate |
| JPH08232944A (en) * | 1995-02-28 | 1996-09-10 | Fuji Kiko Co Ltd | Manufacture, forming die and forming punch of metallic sheet bearing part |
| CN2223150Y (en) * | 1995-05-17 | 1996-03-27 | 马传佩 | Composite punch |
| CN101653788A (en) * | 2009-09-16 | 2010-02-24 | 哈尔滨工业大学 | High aspect ratio micro-hole impact extrusion compound molding device and method |
| CN204276648U (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | A kind of reduction hot forming steel plate pierce punch dull die |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106583534A (en) * | 2016-12-22 | 2017-04-26 | 广东长盈精密技术有限公司 | CNC cutting tool and CNC machining method |
| CN108311581A (en) * | 2018-03-23 | 2018-07-24 | 无锡臻致精工科技有限公司 | Hole expansion die and expanding method |
| CN111729969A (en) * | 2020-06-11 | 2020-10-02 | 陈亚秀 | Metal forming stamping die |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150325 |