CN101941032B - Local drawing and molding technology for rear cover plate of front section of automotive girder - Google Patents
Local drawing and molding technology for rear cover plate of front section of automotive girder Download PDFInfo
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- CN101941032B CN101941032B CN2010102266533A CN201010226653A CN101941032B CN 101941032 B CN101941032 B CN 101941032B CN 2010102266533 A CN2010102266533 A CN 2010102266533A CN 201010226653 A CN201010226653 A CN 201010226653A CN 101941032 B CN101941032 B CN 101941032B
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Abstract
The invention relates to local drawing and molding technology for a rear cover plate of a front section of an automotive girder. In the technology, a mode of blanking first and then locally drawing, molding and flanging is adopted to modify the conventional drawing technology and a molding structure aiming at parts per se is formed. A position needing drawing is locally drawn; a position which does not need drawing and only needs molding or flanging is subjected to the molding and flanging technology. The technology can reduce the processing cost and material cost to the greatest degree.
Description
Technical field
The invention belongs to the forming materials technical field.
Background technology
The automobile longitudinal beam front section back shroud is a product that connects automobile front longitudinal and preceding floor and battery is installed in the above.The automobile longitudinal beam front section back shroud all is divided into left and right two parts, and its shape is as depicted in figs. 1 and 2.Producing the common way of this type of part is exactly the technology (common mode is expected altogether) of taking left and right merging to draw.Why all being to take this technology usually, is because the profile at the place that loops shown in Fig. 1 and Fig. 2 is complex-shaped, and material flows these two the local wide variety of materials that can produce in forming process.If take the technology of common moulding, the material flow direction in uncontrollable these two places, and the bounce-back of uncontrollable part and the shape of product precision that can't guarantee these two places are so select to take drawing work usually.
And take drawing work that the shortcoming of following two aspects is arranged:
1. stock utilization is low, probably about 40 percent.See shown in Figure 3ly, among the figure in the thick line sealing lines be product, and outside whole are that to draw needed technology additional, the waste material that follow-up needs cut away.
2. operation quantity is on the high side relatively: usually, making mould according to this type of technology needs at least: draw, edge-cutting and hole-punching, side cut are cut punching side blow hole, the flanging and restriking hole flanging just can be worked it out.
Summary of the invention
In order thoroughly to solve the defective of drawing work, the objective of the invention is to propose the local drawing and moulding technology of a kind of automobile longitudinal beam front section back shroud, thus maximized cutting down finished cost and material cost.
Technical scheme of the present invention is following:
The local drawing and moulding technology of a kind of automobile longitudinal beam front section back shroud, said technology is to take first blanking, and draw+moulding flange mode the part then, and detailed process is following:
(1) blanking
At first confirm the blanking line: according to the shape of automobile longitudinal beam front section back shroud product; Be divided into two zones to product, first area A is simply zone of shape of product, is fit to adopt the moulding flanging process; Adopt cae analysis software directly to calculate product blanking line; Perhaps come out to confirm the product edge line through taking line cutting or laser cutting to touch appearance, the blanking line that this edge line is promptly regional for this reason directly cuts out the product edge line when blanking is produced; Second area B is the complicated zone of product curve form, is fit to adopt drawing work, when the blanking line computation, this regional edge line is put the trimming allowance of 5～8mm, and operation cuts out the product edge line in the back again after drawing completion;
Then, confirm blanking stock layout mode: after the blanking line is confirmed, part about the longitudinal beam front section back shroud is carried out the design of mandarin duck stock layout respectively, a material two tablets that fall;
At last, after blanking line and blanking stock layout mode are confirmed, promptly carry out mould design and making, and carry out blanking production;
(2) draw-moulding-flange the part
The working portion of the shaping mould mould that this step adopts comprises punch, following eccentric swage, goes up eccentric swage, lower cavity die and upper bolster and die shoe; Said upward punch and following eccentric swage are earlier to arranging; Eccentric swage on the side of last punch is arranged, itself and lower cavity die positioned opposite; As pressure source, it is pressure source that said upward eccentric swage adopts nitrogen spring to said eccentric swage down with push rod; The pressure of said push rod is greater than the pressure of patrix nitrogen spring;
Plate is put on the mould; When mould is started working, make punch simultaneously contact plate with last eccentric swage with the right side lower cavity die with following eccentric swage earlier, it is descending to go up punch by the press top shoe drive of mould then; Force down eccentric swage and push rod descending; The first area A of the plate of pushing down by last punch and following eccentric swage, flow part does not take place and forms in the material of first area, and this regional material only produces the moulding of the little shape in topical product bottom surface and forms the flange outside the plate; Simultaneously, the plate second area that last eccentric swage and right side lower cavity die are pushed down draws this zone, because the strength of nitrogen spring is less than push rod strength, so zone material in the descending process of push rod takes place to flow, plate produces drawing process in this zone; Press continues descending, and mould arrives bottom dead centre, and plate has promptly been accomplished moulding flange+part through this process and drawn step, obtains the product blank;
(3) take out the product blank, it is carried out trimming and piercing die, hole flanging flange side blow hole, obtain the automobile longitudinal beam front section back shroud at last.
Invention mainly concentrates on to be revised drawing work in the past; Made modeling structure into to part itself; Local drawing carried out in place to needs draw, to not drawing, only needs the place of moulding or flange to adopt moulding and flanging process.Adopt above-mentioned technology, have the following advantages:
1. because product is that draw the part; So only need carry out a spot of deburring to the place of drawing gets final product; All the other places can directly adopt the mode of blanking to drop out the product edge size come; And the mode of the mandarin duck blanking of part employing, so, obtained improving greatly from stock utilization.This product can material saving 30 to 40 percent through above-mentioned moulding process.
2. from product quality, this type of technology satisfies the stability of part precision demand and production fully in economical with materials.
3. from cost of stamping; To this part take that blanking, moulding flange draw, the technology in trimming and piercing die, hole flanging flange side blow hole, with respect to original technology to take to draw, edge-cutting and hole-punching, punching side deburring side blow hole are cut, the technology of flange hole flanging, the production of can not reaching the standard grade of the blanking operation of this technology; And can select equipment (315T or the 400T of little tonnage; Minimum 500T on the production line) produce, thus reach the standard grade produce in fact have only back three process, cost is lower.
So, in similar industry, can extensively promote the use of this moulding process, if widespread produces great economic benefit in the punching press industry, will for whole punching press industry.
Description of drawings
Fig. 1 is the shape of product figure of longitudinal beam front section back shroud left side part
Fig. 2 is the shape of product figure of the right part of longitudinal beam front section back shroud
Fig. 3 is the drawing work digital-to-analogue moulding figure that prior art adopts drawing work
Fig. 4 A and Fig. 4 B are the blanking The layout that the present invention adopts local drawing work, and Fig. 4 A is left part, and Fig. 4 B is right part;
Fig. 5 is that the present invention adopts the moulding flange of local drawing work and draws zoning plan
Fig. 6 is the work original state figure that the present invention adopts local drawing work shaping mould mould
Fig. 7 is the work bottom dead centre state diagram that the present invention adopts local drawing work shaping mould mould
The specific embodiment:
The local drawing and moulding technology of the automobile longitudinal beam front section back shroud that the present invention proposes is to take first blanking, the method for local then drawing+moulding flange, and detailed process is following:
(1) blanking
At first confirm the blanking line: we are product the line of demarcation by thick line I shown in Figure 5, are divided into first area A and second area B to product.First area A is because shape of product is simple, and material does not flow in shaping, or local flowing seldom, so only need employing moulding and flanging process to get final product.Second area B is because the product curve form is complicated, and material in forming process a large amount of flowing can take place, so need to adopt the technology of drawing.
First area A moulding and flange, material are in the moulding turn-up process, because material does not flow; Or local flowing seldom; So the product edge line is stable all the time,, perhaps come out to confirm the product edge line through taking line cutting or laser cutting to touch appearance so our product edge line can adopt cae analysis software directly to calculate; The blanking line that this edge line is promptly regional for this reason can directly cut out the product edge line when blanking is produced.
Second area B draws; Wide variety of materials can take place and flow in material in drawing process; It is unstable to draw back product edge line, still need be when the blanking line computation this regional edge line be put the trimming allowance of 5～8mm, operation cuts out the product edge line in the back again after drawing completion.
Secondly; Confirm blanking stock layout mode: after the blanking line is confirmed, we with the longitudinal beam front section back shroud about part carry out the design of mandarin duck stock layout respectively, shown in Fig. 4 A and Fig. 4 B: owing to part one end is triangular in shape; By the mode stock layout shown in the diagram; A material two tablets that fall. such marker method, the maximized stock utilization that improved has been practiced thrift material cost.
After blanking line and blanking stock layout mode are confirmed, can carry out mould design and making, and carry out blanking production.
(2) draw-moulding-flange the part
Above we have been product that the boundary line is divided into first area A to product by thick line I shown in Figure 5: moulding-flange zone and second area B: draw the zone, so this operation is a combination process production of moulding-flange-draw, the practical implementation process is following:
In order to realize this technology, the present invention needs the mould structure of this operation is improved with respect to common shaping mould mould structure. and in this mould structure, working portion of die increases newly with respect to common shaping mould mould structure and has designed a upward eccentric swage.Be that the mould structure working portion comprises punch 1, following eccentric swage 4, goes up eccentric swage 6 and lower cavity die 5 etc., as shown in Figure 6.Last punch 1 and following eccentric swage 4 positioned opposite, following eccentric swage 4 is arranged in the die shoe 9, and last punch 1 is fixed on the upper bolster 8; Eccentric swage 6 on the side of last punch 1 is arranged, itself and lower cavity die 5 positioned opposite, lower cavity die 5 is fixed on the die shoe 9.Following eccentric swage 4 usefulness push rods 3 are used for the first area A of product is carried out the pressure-plate-force source of moulding flange as pressure source.It is pressure source that 6 of last eccentric swages adopt nitrogen spring 7, is used for second area B to product and carries out the pressure-plate-force source of drawing the part.
Before mould is started working, set push rod pressure 100T, be far longer than the pressure 15T of patrix nitrogen spring.
When mould is started working; Last punch 1 simultaneously contacts plate 10 with last eccentric swage 6 with right side lower cavity die 5 with following eccentric swage 4; State as shown in Figure 6. in push rod 3 descending processes; Flow part does not promptly take place corresponding to the material of the first area A of product and forms in the plate part of being pushed down by last punch 1 and following eccentric swage 4, and this regional material only produces the moulding of the little shape in topical product bottom surface (being small boss) and forms the flange outside the plate; Simultaneously; The plate part that last eccentric swage 6 and right side lower cavity die 5 are pushed down; Promptly the second area corresponding to product draws: because the strength of nitrogen spring 7 is far smaller than push rod 3 strength, so zone material in push rod 3 descending processes takes place to flow, plate produces drawing process in this zone.Press (existing structure of mould does not draw among the figure) continues descending, and mould arrives bottom dead centre (state as shown in Figure 7), and plate draws overall process through this process completion moulding flange+part thus, obtains the product blank.
(3) the product blank is taken out, carry out trimming and piercing die, hole flanging flange side blow hole, the product that acquisition at last needs.
Claims (2)
1. the local drawing and moulding technology of an automobile longitudinal beam front section back shroud, said technology is to take first blanking, and draw+moulding flange mode the part then, and detailed process is following:
(1) blanking
At first confirm the blanking line: according to the shape of automobile longitudinal beam front section back shroud product; Be divided into two zones to product; First area A is simply zone of shape of product; Adopt cae analysis software directly to calculate product blanking line perhaps through taking line cutting or laser cutting apperance to come out to confirm the product edge line, the blanking line that this edge line is promptly regional for this reason directly cuts out the product edge line when blanking is produced; Second area B is the complicated zone of product curve form, when the blanking line computation, this regional edge line is put the trimming allowance of 5～8mm, and operation cuts out the product edge line in the back again after drawing completion;
Then, confirm blanking stock layout mode: after the blanking line is confirmed, part about the longitudinal beam front section back shroud is carried out the design of mandarin duck stock layout respectively, a material two tablets that fall;
At last, after blanking line and blanking stock layout mode are confirmed, promptly carry out mould design and making, and carry out blanking production;
(2) draw-moulding-flange the part
The working portion of the shaping mould mould that this step adopts comprises punch, following eccentric swage, goes up eccentric swage, lower cavity die, upper bolster and die shoe; Said punch and the following eccentric swage positioned opposite of going up; Following eccentric swage is arranged in the die shoe, and last punch is fixed on the upper bolster; Eccentric swage on the side of last punch is arranged, itself and lower cavity die positioned opposite, lower cavity die is fixed on the die shoe; As pressure source, it is pressure source that said upward eccentric swage adopts nitrogen spring to said eccentric swage down with push rod; The pressure of said push rod is greater than the pressure of nitrogen spring;
Plate is put on the mould; When mould is started working, make punch simultaneously contact plate with last eccentric swage with the right side lower cavity die with following eccentric swage earlier, it is descending to go up punch by the press top shoe drive of mould then; Force down eccentric swage and push rod descending; The first area A of the plate of pushing down by last punch and following eccentric swage, flow part does not take place and forms in the material of first area, and this regional material only produces the moulding of the little shape in topical product bottom surface and forms the flange outside the plate; Simultaneously, the plate second area that last eccentric swage and right side lower cavity die are pushed down draws this zone, because the strength of nitrogen spring is less than push rod strength, so zone material in the descending process of push rod takes place to flow, plate produces drawing process in this zone; Press continues descending, and mould arrives bottom dead centre, and plate has promptly been accomplished moulding flange+part through this process and drawn step, obtains the product blank;
(3) take out the product blank, it is carried out obtaining the automobile longitudinal beam front section back shroud behind trimming and piercing die, the hole flanging flange side blow Kongzui.
2. the local drawing and moulding technology of automobile longitudinal beam front section back shroud according to claim 1 is characterized in that: draw in the part-moulding-overturning process in, said push rod pressure is 100T, the pressure of nitrogen spring is 15T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102266533A CN101941032B (en) | 2010-07-15 | 2010-07-15 | Local drawing and molding technology for rear cover plate of front section of automotive girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102266533A CN101941032B (en) | 2010-07-15 | 2010-07-15 | Local drawing and molding technology for rear cover plate of front section of automotive girder |
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| Publication Number | Publication Date |
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| CN101941032A CN101941032A (en) | 2011-01-12 |
| CN101941032B true CN101941032B (en) | 2012-03-28 |
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| CN2010102266533A Active CN101941032B (en) | 2010-07-15 | 2010-07-15 | Local drawing and molding technology for rear cover plate of front section of automotive girder |
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| CN102319803A (en) * | 2011-08-22 | 2012-01-18 | 亿森（上海）模具有限公司 | A kind of process and mould thereof that draws the flange moulding |
| CN102489600B (en) * | 2011-12-08 | 2014-04-16 | 中国重汽集团济南动力有限公司 | Process for stamping integrated floor board of heavy truck |
| CN103182436A (en) * | 2011-12-28 | 2013-07-03 | 上海众大汽车配件有限公司 | Trimming piercing die for automobile spare tire cabin part |
| CN103464577B (en) * | 2012-06-06 | 2016-01-27 | 奇瑞汽车股份有限公司 | The manufacture method of automobile " S " type longeron |
| CN103433350A (en) * | 2013-08-14 | 2013-12-11 | 芜湖市续元工贸有限公司 | Automobile back longitudinal beam end plate forming die |
| CN104174768B (en) * | 2014-08-29 | 2016-05-11 | 长城汽车股份有限公司 | mould structure and drawing method |
| CN104492944A (en) * | 2014-11-25 | 2015-04-08 | 重庆市天益模具有限公司 | Drawing die of automobile taillight mounting plate |
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Effective date of registration: 20230109 Address after: No. 20, Lijie Road, Lijia Town, North New District, Yubei District, Chongqing 400000 Patentee after: CHONGQING PINGWEI AUTOMOTIVE TECHNOLOGY Co.,Ltd. Address before: 401122, No. six, No. 1 processing zone, Chongqing economic and Technological Development Zone Patentee before: LIAN WEI AUTO PARTS (CHONQGING) CO.,LTD. |