CN101209466B - Flanging method suitable for bending pipe fitting molding and cavity die suitable for the method - Google Patents
Flanging method suitable for bending pipe fitting molding and cavity die suitable for the method Download PDFInfo
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- CN101209466B CN101209466B CN200610063621XA CN200610063621A CN101209466B CN 101209466 B CN101209466 B CN 101209466B CN 200610063621X A CN200610063621X A CN 200610063621XA CN 200610063621 A CN200610063621 A CN 200610063621A CN 101209466 B CN101209466 B CN 101209466B
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Abstract
The invention provides a flanging method which is suitable for bending pipe fitting forming. The method relates to that after the pre-folding procedure is done to lamellar billets, a billet section with the trend of material gathering during the flanging process is firstly treated with flanging before the flanging for the billet section with no trend of material gathering during the flanging process is done. The invention also provides a cavity die and a part of a mouth of the cavity die, which is corresponding to the billet section with the trend of material gathering during the flanging process, is higher than a part corresponding to the billet section with no trend of material gathering during the flanging process. The flanging method and the cavity die of the invention can ensure that the flanging of the billet section with the trend of material gathering is conducted earlier than the billet section with no trend of material gathering. In addition, the flanging of the billet section with the trend of material gathering is done under no resistance or little resistance, thus preventing material gathering and reducing the possibility of material gathering and material overlapping.
Description
[technical field]
The present invention relates to a kind of method for flanging that is applicable to bending pipe fitting molding, especially a kind of method for flanging that is applicable to bending pipe fitting molding that suppresses poly-material situation generation.
[background technology]
The bending pipe fitting that is similar to car Rear secondary frame for vehicle towing arm adopts the flange forming method to process usually.Referring to Fig. 1-Fig. 6, the process of car Rear secondary frame for vehicle towing arm as shown in Figure 4 is: according to the change of shape trend of towing arm axle to direction (in conjunction with reference to figure 1 and Fig. 4) the sheet blank that cuts is pre-folded earlier, obtain semi-finished product as shown in Figure 1; Carry out the flange moulding again on the basis of Fig. 1, resulting semi-finished product as shown in Figure 2; On Fig. 2 basis, proceed deformation processing, obtain semi-finished product shown in Figure 3, further obtain the blank with product design profile shown in Figure 4 again.In the flange forming process from Fig. 1 to Fig. 2, the profile of the die cavity shape of the flange die that is adopted and car Rear secondary frame for vehicle shown in Figure 4 towing arm adapts, the die cutaway view that die is dissectd gained along the longitudinal center cross section of this die die cavity as shown in Figure 5, the die orifice shape of simplifying gained according to Fig. 5 as shown in Figure 6, this die orifice shape and half-finished profile shown in Figure 2 adapt.Referring to Fig. 6, this die die orifice can be divided into A, B, C, D, five districts of E according to the bending distortion situation along die cavity axial direction (being the axial direction of moulding Rear drag arm), when the sheet blank after shown in Figure 1 the pre-folding is placed that die carries out the flange moulding shown in Fig. 5 (simultaneously with reference to figure 6), under punch and the effect of die die orifice, corresponding to each blank section while flange in die orifice A, B, C, D, five districts of E.By following analysis as can be known, the part corresponding to die orifice C district on the blank is the blank section that poly-material trend is arranged in the turn-up process, and the part corresponding to die orifice A, B, D, four sections of E on the blank is not have the blank section of poly-material trend in the turn-up process.Among Fig. 6, at two sections in die orifice A district and E district, upper wheels profile 1 and lower wheel profile 2 length basically identicals, upper wheels profile 3 and lower wheel profile 4 length basically identicals, during flanging forming on the blank part material flowing velocity corresponding to upper wheels profile 1 and lower wheel profile 2 roughly the same, roughly the same corresponding to the part material flowing velocity of upper wheels profile 3 and lower wheel profile 4, so on the blank corresponding to the part of two sections in die orifice A district and E district also attenuate not of neither poly-material in turn-up process.At two sections in B district and D district, the length of upper wheels profile 5 is greater than the length of the length of lower wheel profile 6, upper wheels profile 7 length greater than lower wheel profile 8, in the turn-up process on the blank corresponding to the material flowing velocity of the part of upper wheels profile 5 and 7 greater than material flowing velocity corresponding to the part of lower wheel profile 6 and 8, so the trend of attenuate is arranged in turn-up process corresponding to the part of die orifice B district and D district two section upper wheels profile 5 and 7 on the blank, the trend of attenuate is arranged in turn-up process corresponding to the part of two sections in die orifice B district and D district on the blank.In the C district, the length of upper wheels profile 9 is less than the length of lower wheel profile 10, in the turn-up process on the blank corresponding to the material flowing velocity of the part of upper wheels profile 9 less than material flowing velocity corresponding to the part of lower wheel profile 10, so the trend of poly-material is arranged in turn-up process corresponding to the part of die orifice C district upper wheels profile 9 on the blank, and the attenuate trend of part in turn-up process corresponding to die orifice B district and D district two section upper wheels profile 5 and 7 makes this two-part material produce extruding to the part corresponding to die orifice C district upper wheels profile 9 on the blank on the blank, will improve on the blank possibility that poly-material takes place corresponding to the part of die orifice C district upper wheels profile 9, the direction of arrow among Fig. 6 shows in the turn-up process material flow direction of corresponding site on the blank.This poly-material phenomenon can produce significantly folded material situation on blank when serious, even cause flange moulding failure.So, be necessary the method for flanging that is adopted in the flange forming process from Fig. 1 to Fig. 2 is improved.
[summary of the invention]
Technical problem to be solved by this invention provides a kind of method for flanging that is applicable to bending pipe fitting molding that poly-material situation takes place that suppresses.
For solving the problems of the technologies described above, the invention provides a kind of method for flanging that is applicable to bending pipe fitting molding, comprise the step that pre-folds of the sheet blank being carried out bending process, after pre-folding step, the blank section that does not have poly-material trend in the turn-up process is not carried out beginning earlier the blank section that poly-material trend is arranged in the turn-up process is carried out flange before the flange according to the change of shape trend of pipe fitting axial direction.
After pre-folding step, when the blank section that does not have poly-material trend in blank section that poly-material trend is arranged in the turn-up process and the turn-up process carries out flange simultaneously, the obstruction of the blank section of the poly-material trend of nothing that has the material of blank section in turn-up process of poly-material trend to flow will to be close to; When the blank section that does not have poly-material trend behind the blank section that poly-material trend is arranged in the turn-up process in turn-up process carried out flange, the inhibition of the blank section of the poly-material trend of nothing that has the material of blank section in turn-up process of poly-material trend to flow to be close to was even more serious.Therefore, after pre-folding step, the blank section that does not have poly-material trend in the turn-up process is carried out before the flange, begin earlier the blank section that poly-material trend is arranged in the turn-up process is carried out blank section that flange can reduce the poly-material trend of the contiguous nothing inhibition to blank section that poly-material trend is arranged, flow comparatively even, smooth and easy and quick (with aforesaid while flange with back flange compare) of material in mould of the blank section of poly-material trend arranged, make the trend that produces poly-material and folded material retarded.
When the blank section that poly-material trend is arranged is carried out flange, can adopt die with following structure in turn-up process: on the die die orifice with turn-up process in have the corresponding part of blank section of poly-material trend be higher than with turn-up process in do not have the corresponding part of blank section of poly-material trend.Like this, punch and die die orifice act on the blank section of poly-material trend earlier when flange, there is the blank section of poly-material trend to begin the flange distortion prior to the blank section that does not have poly-material trend, the blank section that poly-material trend is arranged is beginning flange distortion under the less situation of non-resistance or resistance, can reduce the probability that produces poly-material and folded material trend.
Another technical problem to be solved by this invention provides a kind of die that is applicable to the moulding of bending pipe fitting flange that poly-material situation takes place that suppresses.
For solving this technical problem, the invention provides a kind of die, on this die die orifice with turn-up process in have the corresponding part of blank section of poly-material trend be higher than with turn-up process in do not have the corresponding part of blank section of poly-material trend.
Method for flanging of the present invention makes the blank section of poly-material trend begin flange prior to the blank section that does not have poly-material trend, and the blank section that poly-material trend is arranged is beginning flange distortion under the less situation of non-resistance or resistance, can suppress the generation of poly-material situation; The invention provides a kind of die, on this die die orifice with turn-up process in have the corresponding part of blank section of poly-material trend be higher than with turn-up process in do not have the corresponding part of blank section of poly-material trend, the blank section that punch and die die orifice act on poly-material trend earlier when adopting this die to carry out flange makes to have the blank section of poly-material trend to begin the flange distortion prior to the blank section that does not have poly-material trend, has reduced the probability that produces poly-material and folded material trend.
[description of drawings]
For convenience of explanation, the present invention uses following preferred embodiment and accompanying drawing to do to describe in detail.
Fig. 1 is the half-finished schematic perspective view that obtains after in the car Rear secondary frame for vehicle towing arm machine-shaping process sheet blank that cuts being pre-folded.
Fig. 2 carries out half-finished schematic perspective view of obtaining behind the flange to semi-finished product shown in Figure 1.
Fig. 3 further processes the half-finished schematic perspective view that obtains to semi-finished product shown in Figure 2.
Fig. 4 is a schematic perspective view of further processing the car Rear secondary frame for vehicle towing arm that obtains on semi-finished product shown in Figure 3 basis.
Fig. 5 carries out the cross-sectional schematic that flange obtains the die that semi-finished product shown in Figure 2 adopt to semi-finished product shown in Figure 1.
Fig. 6 simplifies and the simplified schematic diagram of the die die orifice that obtains of subregion Fig. 5.
Fig. 7 is the cross-sectional schematic of a kind of embodiment of die of the present invention.
Fig. 8 simplifies and the simplified schematic diagram of the die die orifice that obtains of subregion Fig. 7.
Fig. 9 is superimposed upon contrast effect sketch among Fig. 8 with die orifice shown in Figure 6.
[specific embodiment]
Fig. 7 and Fig. 8 show a kind of embodiment of die of the present invention.
As shown in Figure 8, this die die orifice is divided into A, B, C, D, five districts of E according to the bending distortion situation along die cavity axial direction (being the axial direction of moulding Rear drag arm).At two sections in die orifice A district and E district, upper wheels profile 1 and lower wheel profile 2 length basically identicals, upper wheels profile 3 and lower wheel profile 4 length basically identicals.The upper wheels profile at die orifice two ends is a horizontal line.In the C district, die orifice upper wheels profile 20 exceeds the contiguous die orifice upper wheels profile in the left and right sides.
For comparing the similarities and differences between die die orifice of the present invention and Fig. 5, the die die orifice shown in Figure 6, Fig. 9 is showing Fig. 7, die die orifice shown in Figure 8 and Fig. 5, die die orifice shown in Figure 6 simultaneously on corresponding position.In conjunction with consulting Fig. 6, Fig. 8 and Fig. 9, the lower wheel profile of these two kinds of die die orifices, two upper level outline lines are identical, chain-dotted line is the part die orifice 21 of Fig. 5, die shown in Figure 6, the end points of two upper level outline lines about M, N are respectively, C district die orifice upper wheels profile 20 line of symmetries about straight line MN drop on the part die orifice 21 of Fig. 5, die shown in Figure 6.End points M, the N of C district die orifice upper wheels profile 20 two upper level outline lines about both sides transit to the left and right respectively.
When processing car Rear secondary frame for vehicle shown in Figure 4 towing arm, the sheet blank that cuts pre-folded obtains semi-finished product shown in Figure 1, on Fig. 2 basis, proceed that deformation processing obtains semi-finished product shown in Figure 3, further to obtain the method for the blank with product design profile shown in Figure 4 more same as the prior art; Flange forming process from Fig. 1 to Fig. 2 adopts Fig. 7 and die shown in Figure 8, and blank carries out flange corresponding to the part (poly-material and folded material may take place when carrying out the flange moulding according to method in the background technology and die this part) of C district die orifice prior to other parts.When the sheet blank after shown in Figure 1 the pre-folding is placed that die carries out the flange moulding shown in Fig. 7 (simultaneously with reference to figure 8), under punch and the effect of die die orifice, begin flange prior to blank section corresponding to die orifice A, B, each district of D, E corresponding to the blank section in die orifice C district.When beginning flange corresponding to the blank in die orifice C district, the B district of both sides, C district and the blank in D district also do not begin flange, corresponding to the blank in die orifice C district is beginning flange distortion under the less situation of non-resistance or resistance, and the probability that produces poly-material and folded material trend significantly reduces.The direction of arrow among Fig. 8 shows the material flow direction on each blank section top in the flange forming process, and when beginning flange corresponding to the blank in die orifice C district, the material on top is respectively to two side flow; And when after this beginning flange corresponding to the blank in die orifice B district and D district, the material on these two section tops flows along the direction of arrow among Fig. 8 respectively, the material on these two section tops has the trend of attenuate, can slow down this attenuate to flowing of two side directions respectively corresponding to the blank top in die orifice C district before this, make the material thickness of flange moulding Rear drag arm each several part more even.
Through CAE sunykatuib analysis and production practices check, the inventive method and mould can make and produce poly-material in the bending pipe fitting molding forming process and folded material trend significantly reduces, and resulting semi-finished product and product meet technological requirement.
Claims (2)
1. method for flanging that is applicable to bending pipe fitting molding, comprise the step that pre-folds of the sheet blank being carried out bending process according to the change of shape trend of pipe fitting axial direction, it is characterized in that: described pre-fold step after, the blank section that does not have poly-material trend in the turn-up process is carried out beginning earlier the blank section that poly-material trend is arranged in the turn-up process is carried out flange before the flange, when the blank section that poly-material trend is arranged is carried out flange, adopt die with following structure in turn-up process: on the described die die orifice with turn-up process in have the corresponding part of blank section of poly-material trend be higher than on the described die die orifice with turn-up process in do not have the corresponding part of blank section of poly-material trend.
2. be suitable for the die of the described method for flanging of claim 1, it is characterized in that: on the described die die orifice with turn-up process in have the corresponding part of blank section of poly-material trend be higher than with turn-up process in do not have the corresponding part of blank section of poly-material trend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610063621XA CN101209466B (en) | 2006-12-31 | 2006-12-31 | Flanging method suitable for bending pipe fitting molding and cavity die suitable for the method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610063621XA CN101209466B (en) | 2006-12-31 | 2006-12-31 | Flanging method suitable for bending pipe fitting molding and cavity die suitable for the method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101209466A CN101209466A (en) | 2008-07-02 |
| CN101209466B true CN101209466B (en) | 2011-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610063621XA Expired - Fee Related CN101209466B (en) | 2006-12-31 | 2006-12-31 | Flanging method suitable for bending pipe fitting molding and cavity die suitable for the method |
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| Country | Link |
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| CN (1) | CN101209466B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111790810A (en) * | 2020-06-02 | 2020-10-20 | 昆山达亚汽车零部件有限公司 | Mold for molding rear support piece and molding process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1003704B (en) * | 1986-04-06 | 1989-03-29 | 蓬莱县南王乡团结农机修造厂 | Edge folding process for cold pressed bi-metal reel pleeve |
| WO2004067200A1 (en) * | 2003-01-31 | 2004-08-12 | Nippon Steel Corporation | Press die apparatus for thin plate and press forming method |
| CN1181332C (en) * | 2003-03-07 | 2004-12-22 | 江苏大学 | Edge pressing force and punching speed changeable single moving sheet hydraulic test machine |
| CN1778487A (en) * | 2004-11-22 | 2006-05-31 | 比亚迪股份有限公司 | Bending stretch shaping method and shaper for low-melting point alloy mould |
-
2006
- 2006-12-31 CN CN200610063621XA patent/CN101209466B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1003704B (en) * | 1986-04-06 | 1989-03-29 | 蓬莱县南王乡团结农机修造厂 | Edge folding process for cold pressed bi-metal reel pleeve |
| WO2004067200A1 (en) * | 2003-01-31 | 2004-08-12 | Nippon Steel Corporation | Press die apparatus for thin plate and press forming method |
| CN1181332C (en) * | 2003-03-07 | 2004-12-22 | 江苏大学 | Edge pressing force and punching speed changeable single moving sheet hydraulic test machine |
| CN1778487A (en) * | 2004-11-22 | 2006-05-31 | 比亚迪股份有限公司 | Bending stretch shaping method and shaper for low-melting point alloy mould |
Non-Patent Citations (4)
| Title |
|---|
| 姜军辉.异型断面异向弯曲件冲压成形工艺.汽车工艺与材料 11.1992,(11),14-16. |
| 姜军辉.异型断面异向弯曲件冲压成形工艺.汽车工艺与材料 11.1992,(11),14-16. * |
| 汪宗道，黄剑.前脸灯框的曲面翻边.模具工业 12.1993,(12),5-9. |
| 汪宗道,黄剑.前脸灯框的曲面翻边.模具工业 12.1993,(12),5-9. * |
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|---|---|
| CN101209466A (en) | 2008-07-02 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing BYD Mould Co., Ltd. Assignor: Biyadi Co., Ltd. Contract fulfillment period: 2008.4.25 to 2014.6.7 Contract record no.: 2008440000064 Denomination of invention: Flanging method suitable for bending pipe fitting molding and cavity die suitable for the method License type: Exclusive license Record date: 20080504 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.4.25 TO 2014.6.7 Name of requester: BEIJING BIYADI DIE CO.,LTD. Effective date: 20080504 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110525 Termination date: 20201231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |