CN103357735B - Opening drawing and forming process of vehicle door inner plate - Google Patents
Opening drawing and forming process of vehicle door inner plate Download PDFInfo
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- CN103357735B CN103357735B CN201210096549.6A CN201210096549A CN103357735B CN 103357735 B CN103357735 B CN 103357735B CN 201210096549 A CN201210096549 A CN 201210096549A CN 103357735 B CN103357735 B CN 103357735B
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- inner plate
- car door
- window frame
- forming process
- opening drawing
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Abstract
The invention discloses an opening drawing and forming process of a vehicle door inner plate. The top of the vehicle door inner plate is connected with a window frame, and the lateral portion is connected with a B-column reinforcing plate to form a whole vehicle door. When the binder surface of the vehicle door inner plate is processed, the vehicle door lower portion of the vehicle door inner plate and the covered edge face of the wheel cover portion can be placed on a blank holder, the window frame portion is placed on a convex die so that the window frame portion is formed through the opening drawing and forming process, a parting line close to the window frame portion turns out to enable a blank external blank holder to be connected with the binder surface at the position of the window frame portion, and the smooth transition of the binder surface is achieved. By means of the opening drawing and forming process, the defects including large supplement face, easily-caused corrugations, cracking and the like in a traditional process are overcome, the quality and the quality stability of products can be effectively improved, and the maintenance cost is reduced. What's more important is that the opening drawing and forming process can enable the material utilization rate to be improved to the most extent, and the stamping production cost is remarkably reduced.
Description
Technical field
The present invention relates to automobile body-in-white panel beating and manufacture field, particularly a kind of opening drawing forming process without window frame door panels of car.
Background technology
Inner plate of car door is the typical large-scale covering of white car body, and the punching press of this part has that drawing depth is high, change in shape violent, and Sheet Metal Forming Technology complexity waits manufacture characteristic, often occurs the mass defects such as wrinkling, cracking and resilience.Moreover, along with the fierceness day by day of automobile market competition, automobile is large to the increasing pressure reduced costs, and especially in punching press field, improves stock utilization and becomes the main factor reducing manufacturing cost.For the forming technology technology of door inner panel, although domestic enterprise also starts the technology exploitation of an inner panel, and grasped some key technologies, but the main shaping of single-piece forming and drawing and the left and right of adopting is to the technology mode of spelling drawing of remaining silent at present, and above-mentioned two kinds of drawing works all also exist certain shortcoming.
The major defect of single-piece draw forming is:
(1) single-piece drawing once can only draw forming part, and process complementary surface is long-pending large, and waste material is many, and stock utilization is very low.
(2) one set of die can only produce a part, and die manufacturing cost is relative with use cost very high, and production efficiency is low.
(3) single-piece production have employed asymmetric shaping, and the distortion of plate and material flowing are difficult to control, and the poor stability of forming quality, the technique that punctures often adopted makes edge of a knife serious wear, causes the maintenance and use cost of mould to increase.
To spelling drawing work shortcoming of remaining silent be:
(1) need larger technique to supplement, adopt closing process that stock utilization is restricted, stock utilization can not be brought up to the limit.Due to the complexity of product, technique is supplemented to be needed to extend about 40mm distance from product, highly about 80mm, and this region has a strong impact on stock utilization as garbage area.
(2) due to forming difficulty in the middle part of product, cracking risk can occur, usually adopt two schemes in sidewall portion, one is that portion opens the material that fabrication hole carrys out supplementary sidewall needs in the product, but unstable product quality.Two is adopt to puncture the cracking defect that technique solves shaping, but scrap can be caused to increase, and affects product quality, and puncture knife serious wear, can maintenance cost be increased.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the object of this invention is to provide a kind of stock utilization high, the opening drawing forming process of the inner plate of car door of cost of stamping can be reduced.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of opening drawing forming process of inner plate of car door, the top of described inner plate of car door is by being connected with window frame, sidepiece is connected with B column reinforcement plate can form overall car door, this inner plate of car door is when carrying out binder surface structure, the bound edge face of the bottom of door of this inner plate of car door and cover portion is placed on blank holder, and window frame portion is placed on punch, window frame portion is made to adopt opening drawing mode to be shaped, die parting line close to window frame portion turns out, the outside blank holder of blank is connected with window frame portion place's binder surface, realizes binder surface smoothly transition.
Preferably, it adopts two-door to spelling mode draw forming, and the B column reinforcement plate side of two inner plate of car door is to spelling.
Preferably, described punch and junction, window frame portion are provided with to lock and expect muscle.
Preferably, the both sides, step turning of described bottom of door and cover portion handing-over are furnished with the circular bead of wall scroll.
Preferably, described cover portion place is furnished with two circular beads.
Preferably, described inner plate of car door waste material porose area adopts step sculpting method to control blank, to improve part rigidity, decreasing rebound.
Preferably, on described inner plate of car door, door handle and junction, window frame portion adopt and protrude sculpting method and realize opening drawing.
Technique scheme has following beneficial effect: the technique of the opening draw forming of this inner plate of car door overcomes conventional process techniques, and to supplement face large, crease easily, the shortcoming such as cracking, effectively can improve the quality of product and the stability of quality, reduce maintenance cost, the more important thing is and stock utilization can be made to bring up to the limit by this technique, significantly reduce the cost of punching production.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of description, coordinates accompanying drawing to be described in detail to this patent below with preferred embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is that the embodiment of the present invention is to spelling mode schematic diagram.
Fig. 2 is embodiment of the present invention structure trend schematic diagram.
Fig. 3 is embodiment of the present invention die parting line schematic diagram.
Fig. 4 is the structural representation of embodiment of the present invention lock material muscle.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figures 1 to 4, this draws the top 11 of inner plate of car door 1 to be connected with window frame, can form overall car door after sidepiece 12 is connected with B column reinforcement plate.In order in the raising stock utilization ensureing to try one's best under the prerequisite of product quality, reduce punching production cost, this drawing and moulding technique is considered that employing is two-door and is carried out spelling mode.Have two kinds of modes to spelling, a kind of be this side of being connected with window frame, top 11 to spelling, another kind be this side of being connected with B column reinforcement plate of sidepiece 12 to spelling, this technique two inner plate of car door preferably adopt B column reinforcement plate side to carry out draw forming to the mode of spelling.In order to the uniformity of the time of contact of punch and plate, and the stability of material flowing in forming process, pressing direction is defined as level of being tried one's best by car door body.
Because the drawing depth of the both sides, window frame portion 15 of inner plate of car door 1 is different, very large difference can be there is in the flowing velocity of material, adopt drawing of remaining silent that stock utilization obviously can be caused significantly to reduce.Found by research, be shaped if window frame portion 15 is placed on punch, instead of be placed on blank holder, construct opening drawing mode, make pressure-pad-force inoperative to this region, place, such plate will not be subject to the effect of blank holder and die in forming process, more tends to free state flowing, thus effectively can improve the utilization rate of material.If but all products are placed on punch, for eliminating the wrinkling trend of two corner vicinities of the wheel cover of forming process, blank length and width direction needs to strengthen, and the utilization rate of material so also can be made to reduce a lot.
Drawing work of the present invention adopts the method for bound edge face as binder surface, if the bound edge face 14 of the bottom of door of this inner plate of car door and cover portion 13 is placed on blank holder and carries out remaining silent drawing, but because of bound edge face 14 big rise and fall, binder surface conformal structure will cause blank holder stitching state poor, and the problem of wrinkling folded material easily occurs.Particularly the binder surface in window frame portion 15 can not build by conformal completely, for this reason can and window frame portion 15 is placed on punch 2, window frame portion 15 is made to adopt opening drawing mode to be shaped, die parting line 16 close to window frame portion 15 should outwards turn out, the outside blank holder of blank is connected with the binder surface at place of window frame portion, realizes binder surface smoothly transition.Verified by cae analysis, adopt this technique closing course to meet quality requirement.On inner plate of car door, door handle and junction, window frame portion 15 adopt and protrude sculpting method, and the blank of protruding parts rides on punch and realizes opening drawing, be formed in later stage controlled prepared material flowing, prevent wrinkling by concave bar.
Adopt opening drawing mode, plate flows freely and flow velocity can be caused too fast, and plate flowing is uneven, and then causes compression to be concentrated, and makes product position that wrinkling trend occur, the generation that also can cause resilience because the tension of drawing is insufficient in addition.Punch 2 and junction, window frame portion 15 are provided with to lock and expect muscle 21 for this reason, and like this before mould is pressed onto the end, plate flowing between die and punch can be pinned, to improve the quality of product by lock material muscle 21.The shape of lock material muscle and size are formulated according to the situation of the flow tendency of material in cae analysis and wrinkling many material.
The junction of this inner plate of car door bottom of door and wheel cover forms step, the stepped area at this place is larger, highly low, be easy to generation wrinkling, wrinkling for preventing, this technique has been furnished with the circular bead of wall scroll respectively in both sides, step turning, improved the resistance of material flowing by bead, in drawing process, the flowing of material can be reduced by bead, and then this step place can be prevented wrinkling.In debugging, need the pressure-pad-force strengthening this place in addition, make the balance weight at this place need bedding-in tighter, to improve resistance.Bead sectional dimension wants even transition, otherwise the short meeting of transitional region causes material large along the normal direction flowing velocity gradient of wheel cover, causes the cracking risk because flow velocity inequality causes.What another place easily produced defect is wheel cover position, this place easily produces the defect of side wall wrinkling and binder surface lobe, two circular beads can be set at this cover portion place for this reason, the resistance of this place's bead answers size to be applicable to, resistance as bead is too little, then the sidewall of cover portion is easy to wrinkling, and the resistance as bead is excessive, can cause the upper R aperature of angle of cover portion.Step sculpting method can be adopted to control blank for the waste material porose area in the middle of inner plate of car door, by the concave station rank moulding of shape of product, drawn component is made to carry out drawing tension force when being closed into the end to the material of large via hole periphery, improve the plastic deformation near this place, improve the rigidity of part, to improve part rigidity, decreasing rebound.Pressure-pad-force, Drawbead Restraining Force and local sculpt should be adjusted simultaneously in cae analysis, cancel and puncture process-cut, eliminate scrap to the impact of product quality, the part stability of draw forming so also can be made to improve, decrease the cost of mold repair simultaneously.
When implementing the opening drawing forming process of this inner plate of car door, the deformation tendency such as analysis and prediction drawing is exactly wrinkling, cracking should be schemed based on FLD, take strain analysis as means, product area strain is distributed in the security domain of shaping to greatest extent, product is made both to have ensure that sufficient drawing, improve product rigidity, again away from the yield criterion of the wrinkling and tension crack of compression, judge and ensure simultaneously the stability of product quality at the influx of the distortion of different drafts, plate, Drawbead Restraining Force coefficient and Shape correction etc. according to plate.
The technique of the opening draw forming of this inner plate of car door overcomes conventional process techniques, and to supplement face large, crease easily, the shortcoming such as cracking, effectively can improve the quality of product and the stability of quality, reduce maintenance cost, the more important thing is and stock utilization can be made to bring up to the limit by this technique, significantly reduce the cost of punching production.
Above the opening drawing forming process of a kind of inner plate of car door that the embodiment of the present invention provides is described in detail; for one of ordinary skill in the art; according to the thought of the embodiment of the present invention; all will change in specific embodiments and applications; in sum; this description should not be construed as limitation of the present invention, and all any changes made according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (7)
1. the opening drawing forming process of an inner plate of car door, the top of described inner plate of car door is by being connected with window frame, sidepiece is connected with B column reinforcement plate can form overall car door, it is characterized in that: this inner plate of car door is when carrying out binder surface structure, the bound edge face of the bottom of door of this inner plate of car door and cover portion is placed on blank holder, and window frame portion is placed on punch, window frame portion is made to adopt opening drawing mode to be shaped, die parting line close to window frame portion turns out, the outside blank holder of blank is connected with window frame portion place's binder surface, realizes binder surface smoothly transition; Be provided with waste material porose area in the middle of described inner plate of car door, described inner plate of car door waste material porose area adopts step sculpting method.
2. the opening drawing forming process of inner plate of car door according to claim 1, is characterized in that: it adopts two-door to spelling mode draw forming.
3. the opening drawing forming process of inner plate of car door according to claim 2, is characterized in that: the two-door B column reinforcement plate side to two inner plate of car door in spelling mode is to spelling.
4. the opening drawing forming process of inner plate of car door according to claim 1, is characterized in that: described punch and junction, window frame portion are provided with to lock expects muscle.
5. the opening drawing forming process of inner plate of car door according to claim 1, is characterized in that: the both sides, step turning of described bottom of door and cover portion handing-over are furnished with the circular bead of wall scroll.
6. the opening drawing forming process of inner plate of car door according to claim 1, is characterized in that: described cover portion place is furnished with two circular beads.
7. the opening drawing forming process of inner plate of car door according to claim 1, is characterized in that: on described inner plate of car door, door handle and junction, window frame portion adopt and protrude sculpting method and realize opening drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210096549.6A CN103357735B (en) | 2012-04-01 | 2012-04-01 | Opening drawing and forming process of vehicle door inner plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210096549.6A CN103357735B (en) | 2012-04-01 | 2012-04-01 | Opening drawing and forming process of vehicle door inner plate |
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| Publication Number | Publication Date |
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| CN103357735A CN103357735A (en) | 2013-10-23 |
| CN103357735B true CN103357735B (en) | 2015-05-13 |
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| CN201210096549.6A Expired - Fee Related CN103357735B (en) | 2012-04-01 | 2012-04-01 | Opening drawing and forming process of vehicle door inner plate |
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| CN106238581B (en) * | 2016-08-31 | 2019-02-26 | 北汽福田汽车股份有限公司 | A kind of drawing method of drawing die and drawn component |
| CN107552645B (en) * | 2017-09-22 | 2018-12-21 | 安徽江淮汽车集团股份有限公司 | Automobile tail gate inner panel forming technology |
| US20200391271A1 (en) * | 2018-01-11 | 2020-12-17 | Honda Motor Co., Ltd. | Blank material, method for press molding blank material, and press molding device |
| CN111842634A (en) * | 2019-04-26 | 2020-10-30 | 标致雪铁龙汽车股份有限公司 | Rear fender forming method, drawing die, rear fender and vehicle |
| CN112474975B (en) * | 2020-12-22 | 2023-01-24 | 天津轻工职业技术学院 | Efficient stamping process for rear section of automobile roof and lower section of outer plate of back door |
| CN113477777B (en) * | 2021-07-08 | 2022-09-13 | 东风柳州汽车有限公司 | Oil filler workpiece forming process |
| CN114210806A (en) * | 2021-12-10 | 2022-03-22 | 东风汽车股份有限公司 | Assembling die drawing die and drawing method for outer door plate of cargo vehicle |
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Granted publication date: 20150513 |