CN102527850B - Punch-bending die for automobile bent bumper - Google Patents
Punch-bending die for automobile bent bumper Download PDFInfo
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- CN102527850B CN102527850B CN201210010438.9A CN201210010438A CN102527850B CN 102527850 B CN102527850 B CN 102527850B CN 201210010438 A CN201210010438 A CN 201210010438A CN 102527850 B CN102527850 B CN 102527850B
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Abstract
A punch-bending die for an automobile bent bumper is used for solving the problems that an existing die is time-consuming and labor-consuming in bumper bending and difficult in ensuring precision and the like. The technical scheme includes that the punch-bending die comprises a lower die fixing part, an upper die and a lower die component, the upper die is inverted trapezoidal, arc transition surfaces are arranged at two base angles of the upper die, the lower die component is positioned on the lower die fixing part and comprises a movable lower die, fixed lower dies and rotary lower dies, the upper plane of the movable lower die corresponds to the bottom surface of the upper die, the lower portion of the movable lower die is provided with springs, the fixed lower dies are symmetrically arranged on two sides of the movable lower die, the tops of the fixed lower dies are provided with recessed arc surfaces corresponding to the arc transition surfaces of the upper die, the rotary lower dies are symmetrically arranged on two sides of the fixed lower dies and hinged to the lower die fixing part, and the top surfaces of the rotary lower dies are planes. The punch-bending die is used for machining the bumper, rebound is effectively controlled, precision of the bumper is improved, rejection rate can be decreased, production efficiency can be improved, and production cost can be reduced.
Description
Technical field
The present invention relates to a kind of mould, especially for the bending mould that rushes of the crooked bumper of processing automobile.
Background technology
Bumper is the main safety knot member to occupant and car body formation protective effect when automobile bumps; the structural design of bumper not only will be considered security performance, also will take into account the related question of other parts that are positioned at collision prevention girders periphery and the global design problem of car body profile.Various bumpers are in the market in order to coordinate the moulding of cabin cover and front covering and to reserve more safe space and be designed to bending structure to foam.In bumper production process, its bending forming method generally adopting is by its bending forming, as shown in Figure 3: stretch-bending molding process adopts rigid unitary stretch bending mold 8, bumper workpiece 7 is placed on rigid unitary stretch bending mold, two ends apply power by chuck 9 to workpiece, make its brake forming.This forming method there will be rebound phenomenon because unloading rear stretch bending workpiece, in order to control resilience, need to repeatedly repair a die, and repeatedly carries out engineer testing, waste time and energy, and precision is difficult to guarantee; In addition, because the material percentage elongation of bumper is low, stretch bending process is produced the drawing crack that is easy to cause product part, and percent defective is high, and the production cost of product increases.
Summary of the invention
The present invention provides a kind of for overcoming the defect of prior art can reduce springback capacity, punch-bending die for automobile bent bumper that machining accuracy is high.
The alleged problem of the present invention is that following technical scheme solves:
A punch-bending die for automobile bent bumper, its special feature is: it is by counterdie fixture, upper die and lower die module composition, and described patrix is inverted trapezoidal, two place, base angle is arc-shaped transitional surface; Described lower membrane module is positioned on counterdie fixture, and it is by movable counterdie, fixing counterdie and rotate counterdie and form, and wherein, on movable counterdie, plane is corresponding with patrix bottom surface, and movable counterdie bottom is provided with spring; Fixedly counterdie is symmetricly set on movable counterdie both sides, and fixedly counterdie top is provided with inner concave arc surface, and this inner concave arc surface is corresponding with the arc-shaped transitional surface of patrix; Described rotation counterdie is symmetricly set on fixedly counterdie both sides, and rotation counterdie and counterdie fixture are hinged, and rotating counterdie end face is plane.
Above-mentioned punch-bending die for automobile bent bumper, is characterized in that: described patrix length L is 700-1300mm, patrix bottom surface length E=1/4-1/2L, and patrix base angle is 100-170 °, the arc-shaped transitional surface arc radius R1 at place, patrix base angle is 200-350mm; Length A=the 1/2-9/10E of described movable counterdie; The arc radius R2=1.1-1.45 R1 of described fixedly counterdie inner concave arc surface.
Above-mentioned punch-bending die for automobile bent bumper, described movable counterdie and the fixedly gap size between counterdie are 0.02-0.05mm.
Above-mentioned punch-bending die for automobile bent bumper, described fixedly counterdie top is provided with the transition plane of docking with movable patrix, this transition plane is connected gently with inner concave arc surface, and the length dimension of described transition plane is B, B > 0 and 2B+A≤E.
Above-mentioned punch-bending die for automobile bent bumper, the end surface shape of described rotation counterdie is segment-shaped, and rotating counterdie radius R is 80-200mm, and its top plan range of its distance of rotate center is that F is 30-80mm.
Above-mentioned punch-bending die for automobile bent bumper, described spring is two symmetrically arranged nitrogen springs.
The present invention is directed to that existing bumper bending forming is wasted time and energy, precision is difficult to the problems such as assurance and improves, and designed a kind of punch-bending die for automobile bent bumper.This mould is by upper die and lower die module composition, lower membrane module comprises movable counterdie, fixing counterdie and rotate counterdie, workpiece is in rushing curved process, the force and moment that in the time of can overcoming both sides bending simultaneously, position produces therebetween, rotate counterdie and hold product part, and rush curved process and fit with product part all the time whole, increased the contact area of workpiece and counterdie, wound and local stress are pressed against in the surface that has reduced workpiece, owing to there being upper and lower mould co-controlling springback capacity, its springback capacity and crooked precision thereof can well be guaranteed, simultaneously, due to the tensile force not having to both sides, be difficult for causing the drawing crack of product part, can ensure the quality of product surface, reduce percent defective.Adopt mould of the present invention, when effectively controlling resilience, improving Product Precision, can reduce percent defective, enhance productivity, reduce production costs.
Accompanying drawing explanation
Fig. 1 is the not structural representation of depressed state of patrix of the present invention;
Fig. 2 is the structural representation of patrix depressed state of the present invention;
Fig. 3 is existing bending motor bumper bending forming schematic diagram.
Attached number in the figure is expressed as follows: 1. counterdie fixture; 2. rotate counterdie; 3. fixing counterdie; 3-1. transition plane; 3-2. inner concave arc surface; 4. movable counterdie; 5. patrix; 6. spring; 7. bumper workpiece; 8. whole stretch bending mold; 9. chuck.
The specific embodiment
Referring to Fig. 1, the present invention is by counterdie fixture 1, patrix 5 and counterdie module composition.Described patrix 5 is inverted trapezoidal, and two place, base angle is arc-shaped transitional surface.Described lower membrane module is positioned on counterdie fixture 1, it is by movable counterdie 4, fixing counterdie 3 and rotate counterdie 2 and form, movable counterdie, fixedly counterdie and the end face that rotates counterdie are for processing profile, and the profile being combined by above-mentioned three forms the geometric surface mating with patrix bottom surface.Wherein, the upper plane of movable counterdie is corresponding with patrix bottom surface, and movable counterdie bottom is provided with spring 6, and spring is selected nitrogen spring.Described fixedly counterdie 3 is symmetricly set on movable counterdie both sides, and fixedly counterdie top is provided with inner concave arc surface 3-1, and this inner concave arc surface is corresponding with the arc-shaped transitional surface of patrix; Fixedly counterdie top is also provided with the transition plane 3-2 docking with movable patrix, and this transition plane is connected gently with inner concave arc surface 3-1.Described rotation counterdie 2 is symmetricly set on fixedly counterdie both sides, and rotation counterdie and counterdie fixture are hinged, and rotating counterdie end face is plane, and the end surface shape of rotating counterdie 2 is segment-shaped.
Still referring to Fig. 1, different according to processed bumper specification of workpieces, the physical dimension of each several part of the present invention is as follows: the length L of patrix 5 is 700-1300mm, patrix bottom surface length E=1/4-1/2L, patrix base angle is 100-170 °, and the arc-shaped transitional surface arc radius R1 at place, patrix base angle is 200-350mm; The length dimension A=1/2-9/10E of movable counterdie 4; The fixing arc radius R2=1.1-1.45 R1 of counterdie inner concave arc surface 3-1; The length dimension of transition plane 3-2 is B, B > 0 and 2B+A≤E; Movable counterdie 4 and the fixedly gap size between counterdie 3 are 0.02-0.05mm.The radius size R that rotates counterdie 2 is 80-200mm, and its distance of rotate center top plan range is that F is 30-80mm.
Provide a specific embodiment of the present invention: patrix overall length dimension L is 1080mm, patrix bottom surface length E is 400mm, and patrix base angle is for being 158 °, and the arc-shaped transitional surface arc radius R1 at place, patrix base angle is 278mm; The length dimension A of movable counterdie 4 is 320mm; Fixedly the length dimension B of counterdie 3 transition plane 3-2 is 34.69mm; Fixedly the arc radius R2 of counterdie inner concave arc surface 3-1 is 350mm; Movable counterdie and the fixedly gap size between counterdie are 0.03mm; The radius of gyration R that rotates counterdie 2 is 145mm, and its distance of rotate center top plan range is that F is 50mm.
Referring to Fig. 1, Fig. 2, the course of work of the present invention is as follows: the first step is with the two ends location of bumper workpiece 7, be seated on lower membrane module, when bumper workpiece is not depressed, rotate the end face of counterdie 2 in level, movable counterdie 4 is supported by spring 6, and on it, plane and rotation counterdie end face are in same plane; Second step rushes in curved process, and patrix is to undershoot, and movable counterdie 4 moves down thereupon, rotates counterdie 2 and rotates thereupon, and bumper workpiece both sides rely on patrix gradually; The 3rd step, mould punching puts in place, and patrix, bumper workpiece, lower membrane module are fitted completely; The 4th step workpiece rushes after curved completing, and patrix lifts gradually, and movable counterdie 4 rises bumper workpiece 7 is held up under spring 6 effects, and operator takes out and produces the bumper workpiece processing.
Claims (6)
1. a punch-bending die for automobile bent bumper, is characterized in that: it is by counterdie fixture (1), patrix (5) and counterdie module composition, and described patrix (5) is inverted trapezoidal, and two place, base angle is arc-shaped transitional surface; It is upper that described lower membrane module is positioned at counterdie fixture (1), and it is by movable counterdie (4), fixedly counterdie (3) and rotation counterdie (2) form, and wherein, on movable counterdie, plane is corresponding with patrix bottom surface, and movable counterdie bottom is provided with spring (6); Fixedly counterdie is symmetricly set on movable counterdie both sides, and fixedly counterdie top is provided with inner concave arc surface (3-1), and this inner concave arc surface is corresponding with the arc-shaped transitional surface of patrix; Described rotation counterdie (2) is symmetricly set on fixedly counterdie both sides, and rotation counterdie and counterdie fixture are hinged, and rotating counterdie end face is plane.
2. punch-bending die for automobile bent bumper according to claim 1, it is characterized in that: described patrix (5) length L is 700-1300mm, patrix bottom surface length E=(1/4-1/2) L, patrix base angle is 100-170 °, and the arc-shaped transitional surface arc radius R1 at place, patrix base angle is 200-350mm; The E of the length A of described movable counterdie (4)=(1/2-9/10); The arc radius R2=(1.1-1.45 of described fixedly counterdie inner concave arc surface (3-1)) R1.
3. punch-bending die for automobile bent bumper according to claim 2, is characterized in that: described movable counterdie (4) and the fixedly gap size between counterdie (3) are 0.02-0.05mm.
4. according to the punch-bending die for automobile bent bumper described in claim 1 or 2 or 3, it is characterized in that: described fixedly counterdie (3) top is provided with the transition plane (3-2) of docking with movable counterdie (4), described transition plane is connected gently with inner concave arc surface (3-1), the length dimension of described transition plane is B, B > 0 and 2B+A≤E.
5. punch-bending die for automobile bent bumper according to claim 4, is characterized in that: the end surface shape of described rotation counterdie (2) is segment-shaped, and rotating counterdie radius R is 80-200mm, and its top plan range of its distance of rotate center is that F is 30-80mm.
6. punch-bending die for automobile bent bumper according to claim 5, is characterized in that: spring (6) is two symmetrically arranged nitrogen springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210010438.9A CN102527850B (en) | 2012-01-13 | 2012-01-13 | Punch-bending die for automobile bent bumper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210010438.9A CN102527850B (en) | 2012-01-13 | 2012-01-13 | Punch-bending die for automobile bent bumper |
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| Publication Number | Publication Date |
|---|---|
| CN102527850A CN102527850A (en) | 2012-07-04 |
| CN102527850B true CN102527850B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210010438.9A Active CN102527850B (en) | 2012-01-13 | 2012-01-13 | Punch-bending die for automobile bent bumper |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537341B (en) * | 2015-11-30 | 2017-10-10 | 上海凌云工业科技有限公司 | D shaped sections high-strength steel bumper bending forming methods |
| CN110385358A (en) * | 2019-07-25 | 2019-10-29 | 凌云工业股份有限公司汽车零部件研发分公司 | A kind of molding die of automobile S type aluminium alloy extrusions bumper |
| CN110899421B (en) * | 2019-12-27 | 2021-09-14 | 卡斯马汽车系统（重庆）有限公司 | Method for bending metal bumper beam and method for bending aluminum alloy bumper beam |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1787151A (en) * | 1929-02-12 | 1930-12-30 | Hudson Motor Car Co | Flanging body panels |
| US2528072A (en) * | 1946-02-16 | 1950-10-31 | Mueller Otto | Expanding and contracting dies for drawing bumpers |
| GB1203991A (en) * | 1967-05-26 | 1970-09-03 | Prec Presswork Co Ltd | Improvements in or relating to the bending of sheet metal |
| JP3353254B2 (en) * | 1992-10-31 | 2002-12-03 | 川崎油工株式会社 | Press forming equipment for bumper beams for automobiles |
| CN2623370Y (en) * | 2003-06-12 | 2004-07-07 | 中国重型汽车集团有限公司 | Bending mould of ''U''workpieces |
| CN201455099U (en) * | 2009-07-21 | 2010-05-12 | 四川宁江山川机械有限责任公司 | Swinging block bottom beating molding and shaping mould structure of shock absorber bracket |
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Inventor after: An Baoqin Inventor after: Chen Erkui Inventor after: Zhang Li Inventor after: Wu Yuhui Inventor after: Yan Li Inventor before: An Baoqin Inventor before: Chen Erkui Inventor before: Zhang Li Inventor before: Wu Yuhui Inventor before: Yan Li |
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