CN101518802A - Stretch-bending forming die and forming method - Google Patents
Stretch-bending forming die and forming method Download PDFInfo
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- CN101518802A CN101518802A CN200810017543A CN200810017543A CN101518802A CN 101518802 A CN101518802 A CN 101518802A CN 200810017543 A CN200810017543 A CN 200810017543A CN 200810017543 A CN200810017543 A CN 200810017543A CN 101518802 A CN101518802 A CN 101518802A
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Abstract
The invention discloses a stretch-bending forming die and a forming method, including a basic body (5), a cushion layer (4), a connecting bolt (7) and two clamp blocks (6). The end surface of one end of the basic body (5) is an arc working surface (10), with a through-hole (11) which is matched with the connecting bolt (7) in the middle. One clamp block, a plurality of basic bodies and another clamp block are sequentially arranged on the connecting bolt (7) in series and tightly clamped and fixed, thereby integrating a die; by adjusting the position (11) where the connecting bolt passes through a through groove on each basic body, the position of the working surface (10) of each basic body is adjusted; and by fixing the die onto the working table of a stretch bender by a mounting hole (9), the stretch-bending forming is carried out to a workpiece (2) to be formed. In the forming process, by slightly adjusting the position of the basic body (5), the shape of the external surface of the die is changed so as to compensate the rebounding effect on the forming accuracy and adapt to the rebounding control needs of different stretch-bending parts; and the invention is characterized by simple structure, convenient use, high production efficiency and low cost.
Description
One, technical field
The present invention relates to field of machining, specifically is a kind of stretch wrap forming mould and manufacturing process.
Two, background technology
It is big that stretch bending process is used for manufacturing dimension, and the profile accuracy requirement is higher, and the curved material bool of extruding that relative bending radius is big and plate is the important production technology of making constitutional details such as frame on car, ship, the aircraft, rib, edge strip.
As shown in Figure 1, for a long time, rigid unitary stretch bending mould 1 is all adopted in the manufacturing of stretch bending part, and workpiece 2 is placed on the rigid unitary stretch bending mould 1, and two ends apply pulling force by chuck 3 to workpiece, make its shaping.This manufacturing process rebound phenomenon can occur because of unloading back stretch bending workpiece 2, in order to control resilience, need repair a die repeatedly, carries out technological experiment repeatedly, waste time and energy, and precision is difficult to guarantee.Simultaneously, workpiece of this method promptly needs a mould, causes number of molds huge, has increased production cost.
Three, summary of the invention
A part needs a mould in the existing stretch bending technology in order to overcome, and number of molds is huge in causing producing, and production cost height, and the component shaping precision deficiency that is difficult to guarantee the present invention proposes a kind of stretch wrap forming mould and manufacturing process.
The present invention is integrated into the mould with certain profile with a plurality of discrete element bodies, and this mould can make up arbitrarily according to the requirement of formed thereby section bar, comprises a plurality of element bodies, bed course, two fixture blocks and connecting bolt.Wherein, element body is the elementary cell of mould, is cuboid, and width is greater than the width of workpiece to be formed, and there is the strip through-hole that cooperates with connecting bolt at the middle part; The end face of element body one end is a working face, and this working face is a cambered surface; The quantity of element body should be determined according to the span size and the element body thickness of institute's processing parts.
Adopt elastomeric material in order to the bed course of eliminating the gap of each element body in integrated, this bed course should have enough elastic deformabilities and certain rigidity, is placed on walk-off-mode element body working face surface.
Fixture block is " L " shape, its with vertical plane that the walk-off-mode element body contacts on two through holes that are used to install connecting bolt are arranged.The horizontal plane of fixture block has two to be used for and the fixing installing hole of stretch benders work top on base as base.
When assembly jig, a fixture block, a plurality of element body, a fixture block are gone here and there successively and be contained on the connecting bolt, and be fixedly clamped, be integrated into mould; Be placed in the mating surface of elastic insert and each element body that forms mould on the mould, promptly the external envelope face is the work profile of mould; Adjust the position of each element body working face by adjusting position that connecting bolt passes the through hole on each element body, make its external envelope face satisfy required work profile shape.After assembling walk-off-mode, by being positioned at two installation through holes on the fixture block, walk-off-mode is fixed on the workbench of stretch benders, and elastic insert is overlayed on the outer mold surface of discrete element body, place the section bar workpiece for the treatment of stretch bending at last, carry out stretch wrap forming.
When using this mould, concrete steps are:
The first step is determined the work profile of mould, sets the position of each element body and is integrated into mould according to the external form check frock or the profile clamp of stretch wrap forming workpiece; The mould that assembles is installed on the workbench of stretch benders, places elastic insert in the work profile simultaneously.
Second step, workpiece to be formed is installed, try stretch wrap forming.
In the 3rd step, removal stretch benders load is taken off the workpiece that has been shaped, forms the measurement of workpiece size and springback capacity under the situation that workpiece does not stress.
In the 4th step, adjust the position of each element body of mould according to the measurement result of springback capacity, thereby revise die face.If the actual curvature of workpiece surpasses theoretical curvature, then reduce the curvature of enveloping surface; Otherwise, then increase the curvature of enveloping surface.
In the 5th step, try stretch wrap forming again.
The 6th step repeated the 3rd and went on foot for the 5th step, up to obtaining each the best element body position and the work profile of mould.
The 7th step, stretch wrap forming in batches.
The present invention is integrated into the mould that adapts according to the requirement of Forming Workpiece profile with a plurality of discrete element bodies, utilizes general stretch benders that section bar is carried out stretch wrap forming; In the forming process,, change the outer mold surface shape of walk-off-mode,, realize the Accurate Shaping of stretch bending part with the influence of compensation resilience to forming accuracy by the position of fine setting element body.The present invention replaces traditional whole stretch wrap forming mould with stretch bending mould that can be integrated, its work profile is easy to adjust, can adapt to the needs of different stretch bending part resilience controls, reduces manufacturing and designing the cycle of stretch bending part significantly, improve the manufacturing efficient of stretch bending part, reduced production cost.
Four, description of drawings
The present invention is described further below in conjunction with accompanying drawing.
Fig. 1 is traditional stretch wrap forming principle schematic.Rigid unitary stretch bending mould 1 is fixed on the stretch benders workbench among the figure, by chuck 3 stretch bending power 4 is applied on the curved workpieces 2.
Fig. 2 is a structural representation front view of the present invention.
Fig. 3 is a structural representation vertical view of the present invention.
Fig. 4 is a structural representation side view of the present invention.
Fig. 5 is the front view of element body.
Fig. 6 is the A-A cutaway view of element body.
Fig. 7 is the front view of fixture block.
Fig. 8 is the side view of fixture block.
Fig. 9 is a stretch wrap forming process schematic diagram of the present invention.Wherein:
1. whole stretch bending mould 2. workpiece 3. chucks 4. bed courses 5. element bodies
6. fixture block 7. bolts 8. external envelope faces 9. fixture block through holes 10. element body working faces
11. element body through hole 12. installing holes
Five, the specific embodiment
Embodiment one
Present embodiment is to be used for the rectangle that the forming profiles part section is 15*20mm, radius is 350mm, length is the stretch bending mould of the arc profile part of 510mm, it is characterized in that a plurality of discrete element bodies are integrated into the mould with certain profile, and this mould can make up arbitrarily according to the requirement of formed thereby section bar.This mould comprises element body 5, bed course 4, two fixture blocks 6, bolt 7.
In the present embodiment, element body is the elementary cell of mould, is integrated into mould by 13 element bodies.The lotus size that the appearance and size of element body is carried according to stretch bending reaches to be determined the requirement of mold stiffness.Be convenient processing and use, the work cambered surface of the element body of present embodiment is got arc surface, and the diameter of this circular arc equates with element body thickness.Element body 5 is a cuboid, and its cross section is a rectangle, and thickness is 15mm, and width is greater than workpiece to be formed, and there is the strip through-hole 11 that matches with connecting bolt 7 centre.
Bed course 4 adopts thermoplastic polyurethane rubber, and hardness is 85, and elongation at break is between 500%-700%.The thickness of bed course 4 is 15mm, and width is than the wide 30mm of forming part, and length gets final product than forming part length is long slightly.Bed course 4 is placed on walk-off-mode element body working face surface, can improves depression gap between each walk-off-mode element body circular arc working face the successional influence of workpiece shape.
During assembly jig, at first two fastening bolts 7 are passed the through hole 12 of a fixture block 6, each element body 5 strings that then centre had through hole 11 are installed another fixture block 6 then on bolt 7, and fixing by connecting bolt 7.Before being fastenedly connected bolt 7, according to the measurement frock or the profile clamp of section bar, adjust the position of each element body 5, make its external envelope face 8, promptly the inner surface of bed course reaches required work profile shape.After assembling mould, by being positioned at two installation through holes 9 on the fixture block 6, mould is fixed on the workbench of stretch benders, and elastic insert 4 is overlayed on the outer mold surface of the element body after integrated, place the section bar workpiece 2 for the treatment of stretch bending at last, carry out stretch wrap forming.
When using this mould, concrete steps are:
The first step is determined the work profile of mould, sets the position of each element body and is integrated into mould according to the external form check frock or the profile clamp of stretch wrap forming workpiece 2; The mould that assembles is installed on the workbench of stretch benders, places elastic insert 4 in the work profile simultaneously.
Second step, workpiece 2 to be formed is installed, try stretch wrap forming.
In the 3rd step, removal stretch benders load is taken off the workpiece 2 that has been shaped, forms the measurement of workpiece size and springback capacity under the situation that workpiece does not stress.
In the 4th step, adjust the position of each element body in the mould according to the measurement result of springback capacity, thereby revise die face.If the actual curvature of workpiece surpasses theoretical curvature, then reduce the curvature of enveloping surface 8; Otherwise, then increase the curvature of enveloping surface 8.
In the 5th step, try stretch wrap forming again.
The 6th step repeated the 3rd and went on foot for the 5th step, up to obtaining each the best element body position and the work profile of mould.
The 7th step, stretch wrap forming in batches.
Embodiment two
Present embodiment is to be used for the rectangle that the forming profiles part section is 150*200mm, radius is 3000mm, length is the stretch bending mould of the arc profile part of 3140mm, it is characterized in that a plurality of discrete element bodies are integrated into the mould with certain profile, and this mould can make up arbitrarily according to the requirement of formed thereby section bar.This mould comprises element body 5, bed course 4, two fixture blocks 6, bolt 7.
In the present embodiment, element body is the elementary cell of mould, is integrated into mould by 20 element bodies.The lotus size that the appearance and size of element body is carried according to stretch bending reaches to be determined the requirement of mold stiffness.The work cambered surface of element body is got oval cambered surface, and the length ratio of minor axis and major axis should be between 0.2-1.The long axis of ellipse diameter of present embodiment equates that with element body thickness minor axis length is half of major axis.Element body 5 is a cuboid, and its cross section is a rectangle, and thickness is 150mm, and width is greater than workpiece to be formed, and there is the strip through-hole 11 that matches with connecting bolt 7 centre.
Bed course 4 still adopts thermoplastic polyurethane rubber, and hardness is 85, and elongation at break is between 500%-700%.The thickness of bed course 4 is 40mm, and width is than the wide 50mm of forming part, and length gets final product than forming part length is long slightly.Bed course 4 is placed on walk-off-mode element body working face surface, can improves depression gap between each walk-off-mode element body circular arc working face the successional influence of workpiece shape.
During assembly jig, at first two fastening bolts 7 are passed the through hole 12 of a fixture block 6, each element body 5 strings that then centre had through hole 11 are installed another fixture block 6 then on bolt 7, and fixing by connecting bolt 7.Before being fastenedly connected bolt 7, according to the measurement frock or the profile clamp of section bar, adjust the position of each element body 5, make its external envelope face 8, promptly the inner surface of bed course reaches required work profile shape.After assembling mould, by being positioned at two installation through holes 9 on the fixture block 6, mould is fixed on the workbench of stretch benders, and elastic insert 4 is overlayed on the outer mold surface of the element body after integrated, place the section bar workpiece 2 for the treatment of stretch bending at last, carry out stretch wrap forming.
When using this mould, concrete steps are:
The first step is determined the work profile of mould, sets the position of each element body and is integrated into mould according to the external form check frock or the profile clamp of stretch wrap forming workpiece 2; The mould that assembles is installed on the workbench of stretch benders, places elastic insert 4 in the work profile simultaneously.
Second step, workpiece 2 to be formed is installed, try stretch wrap forming.
In the 3rd step, removal stretch benders load is taken off the workpiece 2 that has been shaped, forms the measurement of workpiece size and springback capacity under the situation that workpiece does not stress.
In the 4th step, adjust the position of each element body in the mould according to the measurement result of springback capacity, thereby revise die face.If the actual curvature of workpiece surpasses theoretical curvature, then reduce the curvature of enveloping surface 8; Otherwise, then increase the curvature of enveloping surface 8.
In the 5th step, try stretch wrap forming again.
The 6th step repeated the 3rd and went on foot for the 5th step, up to obtaining each the best element body position and the work profile of mould.
The 7th step, stretch wrap forming in batches.
Claims (4)
1. a stretch wrap forming mould comprises mould, it is characterized in that also comprising elastic insert (4), connecting bolt (7) and two fixture blocks (6), wherein:
A. mould is by connecting bolt (7) and integrated the forming of fixture block (6) by a plurality of element bodies (5); The end face of element body (5) one ends is a working face, and this working face is a cambered surface; There is the through hole (11) that cooperates with connecting bolt (7) at the middle part of element body (5);
B. successively a fixture block (6), a plurality of element body (5), a fixture block (6) string are contained in connecting bolt (7) and go up and be fixedly clamped, be integrated into mould; On mould, lay elastic insert (4), and the face that this bed course matches with mould forms external envelope face (8), the work profile that this external envelope face is a mould;
C. adjust the position of each element body (5) working face by adjusting position that connecting bolt (7) passes the strip through-hole (11) on each element body (5).
2. a kind of according to claim 1 stretch wrap forming mould is characterized in that fixture block (6) is " L " shape, its with face that element body (5) cooperates on installation connecting bolt (7) installing hole (12) is arranged; The horizontal plane of fixture block (6) has on base and the fixing installing hole (9) of stretch benders work top as base.
3. a kind of according to claim 1 stretch wrap forming mould is characterized in that the width of the width of element body (5) greater than workpiece to be formed (2).
4. method of using the described stretch wrap forming die forming of claim 1 workpiece, it is characterized in that its concrete steps are: the first step, determine the work profile of mould, set the position of each element body (5) and be integrated into mould according to the external form check frock or the profile clamp of stretch wrap forming workpiece (2); Mould is installed on the workbench of stretch benders, places elastic insert (4) in the work profile;
Second step, workpiece to be formed (2) is installed, try stretch wrap forming;
In the 3rd step, removal stretch benders load is taken off the workpiece (2) that has been shaped, forms the measurement of workpiece size and springback capacity;
The 4th step is according to the position of measurement result adjustment each element body (5) in mould of springback capacity, to revise the walk-off-mode profile; If the actual curvature of workpiece (2) surpasses theoretical curvature, then reduce the curvature of enveloping surface (8); Otherwise, then increase the curvature of enveloping surface (8);
In the 5th step, try stretch wrap forming again;
The 6th step repeated the 3rd and went on foot for the 5th step, up to obtaining best each element body (5) position and walk-off-mode work profile;
The 7th step, stretch wrap forming in batches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100175439A CN101518802B (en) | 2008-02-25 | 2008-02-25 | Stretch-bending forming die and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100175439A CN101518802B (en) | 2008-02-25 | 2008-02-25 | Stretch-bending forming die and forming method |
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| CN101518802A true CN101518802A (en) | 2009-09-02 |
| CN101518802B CN101518802B (en) | 2010-10-13 |
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| CN2008100175439A Expired - Fee Related CN101518802B (en) | 2008-02-25 | 2008-02-25 | Stretch-bending forming die and forming method |
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| CN101837408A (en) * | 2010-04-21 | 2010-09-22 | 吉林大学 | Integral multi-molded surface bending clamping fixture |
| CN102641925A (en) * | 2012-05-07 | 2012-08-22 | 吉林省瑞恒机械有限公司 | Modularization stretch bending clamping fixture for railway vehicle carline |
| CN102641958A (en) * | 2012-05-04 | 2012-08-22 | 太仓市弧螺机电有限公司 | Stretch bending device |
| CN102729048A (en) * | 2012-07-09 | 2012-10-17 | 中国汽车工程研究院股份有限公司 | Aluminium alloy bumper bar section bar bending forming method and device for automobile |
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| CN104384354A (en) * | 2014-11-14 | 2015-03-04 | 长春轨道客车股份有限公司 | Bending and shaping die of vehicle door profile |
| CN104722618A (en) * | 2015-03-05 | 2015-06-24 | 江西洪都航空工业集团有限责任公司 | Stretch bending forming method for Z-shaped proximate matters of airplane at a time |
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- 2008-02-25 CN CN2008100175439A patent/CN101518802B/en not_active Expired - Fee Related
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| CN101837408A (en) * | 2010-04-21 | 2010-09-22 | 吉林大学 | Integral multi-molded surface bending clamping fixture |
| CN102641958A (en) * | 2012-05-04 | 2012-08-22 | 太仓市弧螺机电有限公司 | Stretch bending device |
| CN102641925A (en) * | 2012-05-07 | 2012-08-22 | 吉林省瑞恒机械有限公司 | Modularization stretch bending clamping fixture for railway vehicle carline |
| CN102729048A (en) * | 2012-07-09 | 2012-10-17 | 中国汽车工程研究院股份有限公司 | Aluminium alloy bumper bar section bar bending forming method and device for automobile |
| CN102729048B (en) * | 2012-07-09 | 2014-07-09 | 中国汽车工程研究院股份有限公司 | Aluminium alloy bumper bar section bar bending forming method and device for automobile |
| CN102873145B (en) * | 2012-10-19 | 2015-03-25 | 中国十九冶集团有限公司 | Device and method for processing conical bin wall steel angle |
| CN102873145A (en) * | 2012-10-19 | 2013-01-16 | 中国十九冶集团有限公司 | Device and method for processing conical bin wall steel angle |
| CN103157724A (en) * | 2013-02-27 | 2013-06-19 | 中航飞机股份有限公司西安飞机分公司 | Universal stretch-bending mold of single-curvature arc section bar |
| CN103878238A (en) * | 2014-03-28 | 2014-06-25 | 中国航空工业集团公司北京航空制造工程研究所 | Flexible mold used for profile stretch bending |
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| CN107162399B (en) * | 2017-07-19 | 2020-07-03 | 安徽云融信息技术有限公司 | Glass processing system and processing method |
| CN107352780B (en) * | 2017-07-19 | 2021-05-25 | 安徽云融信息技术有限公司 | Glass processing device and processing method |
| CN107695145A (en) * | 2017-10-11 | 2018-02-16 | 吉林大学 | The adjustable rail vehicle pillar group component stretch wrap forming mould in type face |
| CN112893633A (en) * | 2019-11-19 | 2021-06-04 | 晟通科技集团有限公司 | Section bar stretch bending die |
| CN113070405A (en) * | 2021-05-08 | 2021-07-06 | 南华大学 | Section stretch bending die with replaceable template piece and assembling method thereof |
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| CN101518802B (en) | 2010-10-13 |
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