CN107282724A - Folding line has for the bending technique with the U-shaped part of flange and its shaping group of curve - Google Patents
Folding line has for the bending technique with the U-shaped part of flange and its shaping group of curve Download PDFInfo
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- CN107282724A CN107282724A CN201610197668.9A CN201610197668A CN107282724A CN 107282724 A CN107282724 A CN 107282724A CN 201610197668 A CN201610197668 A CN 201610197668A CN 107282724 A CN107282724 A CN 107282724A
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- bending
- flange
- folding line
- curve
- preforming
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
Abstract
The present invention is the bending technique with the U-shaped part of flange that folding line is curve, is related to a kind of moulding process of the U-shaped parts with flange, comprises the following steps：First step blanking：The profile of blank is cut out in sheet material by the face profile after the U-shaped parts expansion with flange, blank plate is obtained；Second step, it is preforming：The preforming bending of two side flangings and two side is carried out to blank plate, preforming bending member is obtained；3rd step, side wall shaping：Two side shaping bending is carried out to preforming bending member, the angle requirement according to two side in design requirement on U-shaped parts bottom is bent and carries out shaping, obtain molding part；The present invention improves the moulding process of U-shaped parts of the current thin-walled with flange, reduces R＆D costs.
Description
Technical field
Have the present invention relates to a kind of moulding process of U-shaped parts with flange and shaping group；More particularly to folding line is the bending technique with the U-shaped part of flange and its shaping the group tool of curve.
Background technology
The aggravation of competition forces major automobile vendors to seek new technology to tackle precipitate challenge in the fast development of current auto industry and industry.Automobile engine nacelle curb girder is as a kind of thin wall structural member, and the energy accounting absorbed when head-on crash occurs for automobile is very big, is one of important vehicle body parts.Meanwhile, such part is also used for bearing automobile associated components and load gravity, it is necessary to from high-strength material and rational manufacturing process, just can ensure that the performance of product.
Referring to the structure of the engine nacelle curb girder front part 1 of accompanying drawing 1, including the first flange 11 being sequentially connected, the first side wall 12, U-type groove bottom 13, second sidewall 14, the second flange 15, it has the features such as high, complex-shaped intensity, higher surface quality requirements and big resilience, is a typical U-shape structure part for carrying flange.Follow-up assembly precision will be directly affected because the faying surface of the part and other parts is more, but as the size of resilience and the height of precision after the engine nacelle curb girder shaping of plate, therefore selects rational punching production technique to be just particularly important.The process for producing such part at present uses drawing, the forming mode of deburring mostly.
By taking the engine nacelle curb girder front part of ChangAn Automobile vehicle as an example, its general Sheet Metal Forming Technology flow is successively from left to right referring to Fig. 2：Using drawing → deburring and rush datum hole → side wall deburring and shaping → side wall shaping and flange → side wall shaping, side wall deburring and punching.Although deep-drawing technique can the range of work widely, the part belongs to typical U-shaped part, its side wall steeper, and side wall can occur that part resilience after warpage, deburring is big, need single process to carry out shaping in drawing process.In addition, the process uses drawing work, deburring waste material is more, and production cost is higher.
For the band U-shaped part of flange, some domestic automobiles and mould manufacturer take the mode of blank-forming to process part, and the U-type groove bottom of such part all is plane, and folding line is curve.First plate is placed on lower mould, the middle part of plate is pushed down by pressing plate, subsequent upper bolster and and its insert move straight down, obtain U-shaped part by once arriving flanging forming twice；Its technique uses the process of drawing and forming and trimming and piercing die, and the U-shaped part of band flange that this process is obtained has side wall warpage, and part resilience is big after deburring, element precision is not high, and the stock utilization of blank is relatively low, and production cost is higher.
Therefore the various problems that technique, mould structure, manufacture and later stage be likely to occur in must be considered comprehensively in the Sheet Metal Forming Technology of design vehicle engine nacelle curb girder front part, the manufacturing and reduction production cost for qualified parts provide good technique support.
The content of the invention
It is an object of the invention to provide the bending technique with the U-shaped part of flange that folding line is curve, to improve the moulding process of U-shaped parts of the current thin-walled with flange, to improve product quality, stock utilization is improved, it is cost-effective.
In order to achieve the above object, the present invention provides the bending technique with the U-shaped part of flange that folding line is curve, comprises the following steps：
The first step, blanking：The profile of blank is cut out in sheet material by the face profile after the U-shaped parts expansion with flange, blank plate is obtained；
Second step, it is preforming：The default folding line on blank plate is bent with bending cutter, the preforming bending with the U-shaped part of flange is obtained；
3rd step, side wall shaping：Two side shaping bending is carried out to preforming bending member, the angle requirement according to two side in design requirement on U-shaped parts bottom is bent and carries out shaping, obtain molding part.
Further, it is that a bending forming obtains preforming bending member that the second step is preforming, or including：Step A：According to the edge of design requirement bent blank plate, the flange of U-shaped parts is obtained；Step B：The pre-bend carried out to the two side of U-shaped parts；Above-mentioned step A and step B in no particular order order；Step A and step B mainly carry out pre-shaped to preforming bending member, reduce the deflection of single.
Further, in addition to the 4th step, flanging and restriking：The flange of molding part is designed and requires bending shaping, the finished parts that folding line is curve are obtained；Shaping is carried out to the part molding part that modification occurs for flange in the third step, design and installation requirement is met to reach.
Further, the bending technique is used for the molding part that automobile engine nacelle curb girder front part, or cross section are the parts of curve for the U-shaped and folding line bearing of trend of flange；This method be primarily directed to folding line be curve in plane and longitudinal section be the U-shaped parts with flange shaping.
Further, also include carrying out reinforcement shaping or preform to U-shaped parts bottom in the second step；Also include carrying out reinforcement shaping to U-shaped parts two side in the 3rd step；Need to compress U-shaped parts in second step, can be while to carrying out part shape shaping at the top of U-shaped parts, in the third step, shaping, energy be carried out to two side while the reinforcement on offside wall carries out shaping in compaction process.
Further, in the first step, the continuous blanking of use is to use continuous shears technique, and continuous shear stress goes out blank plate from raw material plate；Upper production speed can so be accelerated, production efficiency is improved.
In the second step, pushed down using eccentric swage in the middle part of part, two bending cutters bend obtaining preforming bending member to the blank plate both sides being fixed on lower mould simultaneously；Effect can share a power source while two cutters, relatively easy on device structure, while bent to blank plate both sides simultaneously, can reduce blank plate discontinuity in bending process, the problem of positioning datum is offset.
Further, the 4th step also includes punching, and punching is processed on finished parts according to design requirement, finished product is obtained；To meet installing and using for later stage.
A kind of bending forming group tool, including lower mould, bending cutter corresponding with the lower mould and hold-down mechanism, longitudinal section is extended with for trapezoidal trapezoidal projection in the lower mould upper curve, " V " shape groove is offered on the trapezoidal raised both sides step, the side cell wall of the " V " shape groove is overlapped with two inclination central planes on trapezoidal raised bearing of trend, and the development length of the trapezoidal raised and " V " shape groove with direction with folding line with being adapted.
A kind of bending forming group tool, including lower mould, bending cutter corresponding with the lower mould, longitudinal section is extended with for trapezoidal trapezoidal projection in the lower mould upper curve, " V " shape groove is offered on the trapezoidal raised both sides step, the side cell wall of the " V " shape groove is overlapped with two inclination central planes on trapezoidal raised bearing of trend, described trapezoidal raised adaptable with the development length of the " V " shape groove and the length for the blank plate being bent.
Folding line of the present invention has the beneficial effect that for the bending technique with the U-shaped part of flange of curve：First against in background technology, for the U-shaped part bending technique of Chang'an company, drawing process is employed in prior art, the surface area of local increase plate occurs in the forming method of drawing process, the skew that material occurs in drawing and forming in sheet material in uniform thickness originally can be caused to flow, so as to which positive large U type part is big in the material stretching degrees of offset along curve extended spot, so that stress concentration herein, cause the parts of later stage shaping to be deformed because of stress raisers, influence the installation in later stage；If above mentioned problem also occurs using identical drawing and forming technique for other U-shaped parts；And the skew flowing of material is present at the bending deformation of U-shaped parts in the present invention, for small under the material shifts flowing very in non-change region, each bending place in this method is by twice bended simultaneously, both the deformation for the stress concentration that material shifts fluxion strap comes had been reduced, twice bended, also can preferably ensure the shape after U-shaped parts shaping simultaneously；In the production process of identical product, stock utilization is improved；And there is certain inspiration meaning to the application of other similar U-shaped parts forming technologies.
What a kind of bending forming group of the present invention had has the beneficial effect that：During the use that this group has, bending cutter and the cooperation of " V " type groove, preforming bending is carried out to flange, in bending process, the two side of U-shaped parts is supported using two inclined-planes of the left and right on trapezoidal raised bearing of trend, due to there is certain angle between the plane and two inclined-planes at trapezoidal raised top, cause also can carry out pre-setting in flange forming process to the two side of U-shaped part.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description：
Fig. 1 is the product structure schematic diagram of embodiment；
Fig. 2 is the design of part schematic diagram that respectively walks during conventional machining process；
Fig. 3 is the design of part schematic diagram that respectively walks in the machining process of the present embodiment；
Fig. 4 is the structural representation of blank plate after the present embodiment first step, blanking；
Fig. 5 is the present embodiment second step, the preforming lower mould vertical section structure schematic diagram used；
Fig. 6 is the present embodiment second step, preforming bending figure；
Fig. 7 is the present embodiment second step, the structural representation of preforming rear preforming bending member；
Fig. 8 is the step of the present embodiment the 3rd, the bending figure of side wall shaping；
The step of Fig. 9 the present embodiment the 3rd, the structural representation of side wall shaping aftershaping part；
Figure 10 is the finished product structure schematic diagram after the step of the present embodiment the 4th, flanging and restriking and punching；
It is in figure：The flange of 11- first, 12- the first side walls, 13-U-type groove bottom, 14- second sidewalls, the flange of 15- second, the trapezoidal projections of 2-, 21- left sides central plane, 22- upper surfaces, 23- right sides tilt central plane, 3-" V " shape groove, the first " V " shapes of 31- groove, the first right sides of 312- cell wall, the first left sides of 311- cell wall, the second " V " shapes of 32- groove, the second left sides of 321- cell wall, the second right sides of 322- cell wall；The folding lines of 41- first, the folding lines of 42- second.
Embodiment
Folding line of the present invention has for the bending technique with the U-shaped part of flange and its shaping group of curve, main exemplified by automobile engine nacelle curb girder front part in the present embodiment, introduces the moulding process that bearing of trend is bent, cross section is the U-shaped thin-wall part with flange；Described in the present embodiment is that U-type groove bottom is.
Referring to Fig. 1, the overall structure figure of automobile engine nacelle curb girder front part 1 after the present embodiment shaping, including the first flange 11, the first side wall 12, U-type groove bottom 13, second sidewall 14, the second flange 15 being sequentially connected；In forming process, the first side wall 12 and U-type groove bottom 13 bend facet by bending cutter at the first folding line 41；Second sidewall 14 and U-type groove bottom 13 bend facet by bending cutter at the second folding line 42.
Referring to Fig. 3, moulding process of the invention mainly comprises the following steps：
The first step, blanking：The profile of blank is cut out in sheet material by the face profile after the U-shaped parts expansion with flange, blank plate is obtained；
Second step, it is preforming：The default folding line on blank plate is bent with bending cutter, the preforming bending with the U-shaped part of flange is obtained；
3rd step, side wall shaping：Two side shaping bending is carried out to preforming bending member, the angle requirement according to two side in design requirement on U-shaped parts bottom is bent and carries out shaping, obtain molding part；
4th step, flanging and restriking：The flange of molding part is designed and requires bending shaping, the finished parts that folding line is curve are obtained.
Wherein above-mentioned first step blanking is referring to Fig. 4, from rectangular strip shape blank, using continuous blanking, blanking cutter along along figure 4 in blanking line isolate the blank plate of definite shape；Positioning datum is processed simultaneously in blank plate forming process, common positioning datum is two, two datum holes can play positioning in subsequent technique and prevent blank from being rotated during following process, to reach the effect for ensureing positioning precision.
It is wherein preforming by above-mentioned second step；Bending forming group tool has been used in this step, bending forming group tool includes lower mould and corresponding bending cutter, the cross-sectional structure figure of lower mould is referring to Fig. 5, it is trapezoidal trapezoidal raised 2 that centre in lower template, which is protruding with longitudinal section, and the second " V " shape groove 32 is provided with provided with the first " V " shape groove 31, right side opening in trapezoidal raised 2 left side；First " V " shape groove 31 includes the first left side cell wall 311 and the first right side cell wall 312；Second " V " shape groove 32 includes the second left side cell wall 321 and the second right side cell wall 322；First right side cell wall 312 of the first " V " shape groove 31 with trapezoidal raised 2 left side central plane 21 is coplanar connects, the second left side cell wall 321 of the second " V " shape groove 32 and trapezoidal raised 2 right side tilt that central plane 23 is coplanar to connect；The bearing of trend and length of the trapezoidal both sides of the edge of raised 2 upper surface 22 are adapted with the first folding line 41 and the second folding line 42 to be coordinated；The extension trend for the " V " shape groove 3 being made up of the first " V " shape groove 31 and the second " V " shape groove 32 is adapted with designing the trend of flange.
Referring to Fig. 6, it is preforming to the progress of blank plate using the cooperation of lower mould and bending cutter in this step, positioning is used as using datum hole, pushed down using eccentric swage in the middle part of part, pretightning force is applied to U-type groove bottom 13, feeding bending is carried out to the first " V " shape groove 31 and the second " V " shape groove 32 using knife is bent, to reach for the bending forming between the first flange 11 and the first side wall 12 between the second flange 15 and second sidewall 14, when bending cutter is fed to the first " V " shape groove 31 and the second " V " shape groove 32, bending cutter can apply downward power to the first side wall 12 and second sidewall 14, cause the first side wall 12 and second sidewall 14 to be fitted in trapezoidal raised 2 left and right sides to tilt on central plane, the boundary seamed edge that left and right sides is tilted between central plane and upper surface simultaneously can to form the first folding line 41 and the second folding line 42 between the first side wall 12 and second sidewall 14 and U-type groove bottom 13；Simultaneously to carrying out reinforcement shaping or preforming to U-shaped parts bottom；Preforming bending member is obtained referring to Fig. 7.
The wall shaping of above-mentioned 3rd step side, using second step it is preforming it is rapid in positioning compression mode, shaping is carried out to part of the second step after preforming, the mode of shaping is bent primarily directed to the first side wall 12 and second sidewall 14 relative to the first folding line 41 and the second folding line 42, the first side wall 12 and second sidewall 14 is reached designed inclination angle angle value relative to U-type groove bottom 13 after bending；Reinforcement shaping is carried out on the first side wall 12 and second sidewall 14 simultaneously；It is that the parts after preforming on lower mould of the horizontal shutting of U-type groove bottom 13 are applied with two symmetrical and horizontal by 60 ° of angles bending tools to carry out shaping bending to the first side wall 12 and the bending of second sidewall 14 referring to the shaping used in Fig. 8 the present embodiment, until the angle in the first side wall 12 and second sidewall 14 and central horizontal face is substantially untill 85 ° or so；Molding part is obtained referring to Fig. 7.
Above-mentioned 4th step flanging and restriking and punching；Shaping is carried out primarily directed to first flange 11 of the second step in preforming and the second flange 15 in this step, to being handled referring to design drawing punching.Referring to Fig. 9, the present embodiment is to carry out shaping to the first flange 11 and the second flange 15, while being punched out processing；It is the finished product after the 4th step flanging and restriking and punching referring to Figure 10.
The folding line between the first side wall 12 and second sidewall 14 and U-type groove bottom 13 is only indicated in the present embodiment, does not refer to the folding line between the first flange 11 of place and the first side wall 12, the folding line between the flange 15 of the first side wall 12 and second.
Claims (9)
1. folding line is the bending technique with the U-shaped part of flange of curve, it is characterised in that comprised the following steps：
The first step, blanking：The profile of blank is cut out in sheet material by the face profile after the U-shaped parts expansion with flange, blank plate is obtained；
Second step, it is preforming：The default folding line on blank plate is bent with bending cutter, the preforming bending with the U-shaped part of flange is obtained；
3rd step, side wall shaping：Two side shaping bending is carried out to preforming bending member, the angle requirement according to two side in design requirement on U-shaped parts bottom is bent and carries out shaping, obtain molding part.
2. folding line as claimed in claim 1 is the bending technique with the U-shaped part of flange of curve, it is characterised in that it is that a bending forming obtains preforming bending member that the second step is preforming, or including：
Step A：According to the edge of design requirement bent blank plate, the flange of U-shaped parts is obtained；
Step B：The pre-bend carried out to the two side of U-shaped parts；
Above-mentioned step A and step B in no particular order order.
3. folding line as claimed in claim 1 is the bending technique with the U-shaped part of flange of curve, it is characterised in that also including the 4th step, flanging and restriking：The flange of molding part is designed and requires bending shaping, the finished parts that folding line is curve are obtained.
4. folding line as claimed in claim 1 is the bending technique with the U-shaped part of flange of curve, it is characterized in that, the bending technique is used for the molding part that automobile engine nacelle curb girder front part, or cross section are the parts of curve for the U-shaped and folding line bearing of trend of flange.
5. folding line as claimed in claim 4 is the bending technique with the U-shaped part of flange of curve, it is characterised in that also include carrying out reinforcement shaping or preforming to U-shaped parts bottom in the second step；Also include carrying out reinforcement shaping to U-shaped parts two side in the 3rd step.
6. folding line as claimed in claim 5 is the bending technique with the U-shaped part of flange of curve, it is characterised in that in the first step, the continuous blanking of use is to use continuous shears technique, and continuous shear stress goes out blank plate from raw material plate.
7. folding line as claimed in claim 5 is the bending technique with the U-shaped part of flange of curve, it is characterized in that, in the second step, pushed down using eccentric swage in the middle part of part, preforming bending member is obtained while to the blank plate both sides being fixed on lower mould bend with two bending cutters.
8. folding line as claimed in claim 5 is the bending technique with the U-shaped part of flange of curve, it is characterised in that the 4th step also includes punching, and punching is processed on finished parts according to design requirement, finished product is obtained.
9. a kind of bending forming group tool, it is preforming for the second step of the bending technique with the U-shaped part of flange of curve for the folding line as described in claim 1-9 is any, including lower mould, corresponding with the lower mould bending cutter and hold-down mechanism, it is characterized in that, longitudinal section is extended with for trapezoidal trapezoidal projection in the lower mould upper curve, " V " shape groove is offered on the trapezoidal raised both sides step, the side cell wall of the " V " shape groove is overlapped with two inclination central planes on trapezoidal raised bearing of trend, the development length of the trapezoidal raised and " V " shape groove with direction with folding line with being adapted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610197668.9A CN107282724A (en) | 2016-03-31 | 2016-03-31 | Folding line has for the bending technique with the U-shaped part of flange and its shaping group of curve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610197668.9A CN107282724A (en) | 2016-03-31 | 2016-03-31 | Folding line has for the bending technique with the U-shaped part of flange and its shaping group of curve |
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| Publication Number | Publication Date |
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| CN107282724A true CN107282724A (en) | 2017-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610197668.9A Pending CN107282724A (en) | 2016-03-31 | 2016-03-31 | Folding line has for the bending technique with the U-shaped part of flange and its shaping group of curve |
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| CN (1) | CN107282724A (en) |
Cited By (9)
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| CN108116507A (en) * | 2017-12-29 | 2018-06-05 | 无锡曙光模具有限公司 | A kind of automobile front windshield lower beam cover plate and its processing method |
| CN108581380A (en) * | 2018-04-20 | 2018-09-28 | 北京航星机器制造有限公司 | A kind of aluminum alloy complex abnormal curved surface structural member precision plastic forming method |
| CN108993016A (en) * | 2018-08-13 | 2018-12-14 | 宝鸡华光铸造材料科技有限公司 | A kind of filter for casting and filter head housings production method |
| CN111644856A (en) * | 2020-06-04 | 2020-09-11 | 新乡市合众鑫辉车业有限公司 | Carriage plate integrated door forming device and using method thereof |
| CN112077540A (en) * | 2020-09-09 | 2020-12-15 | 武汉市尚佳盛汽车配件有限公司 | Engine appearance part machining process |
| CN112658088A (en) * | 2021-01-04 | 2021-04-16 | 中国航空制造技术研究院 | Thermal forming method for titanium alloy thin-wall small-angle curved surface flanging |
| CN114273547A (en) * | 2021-12-31 | 2022-04-05 | 浙江金固股份有限公司 | Processing method of reinforcing rib of spoke |
| CN114700687A (en) * | 2022-03-16 | 2022-07-05 | 无锡曙光精密工业有限公司 | Production method of automobile armrest support plate and support plate structure |
| CN115007744A (en) * | 2022-08-08 | 2022-09-06 | 宁波沃特汽车部件有限公司 | Bidirectional bending forming process of reinforcing plate |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108116507A (en) * | 2017-12-29 | 2018-06-05 | 无锡曙光模具有限公司 | A kind of automobile front windshield lower beam cover plate and its processing method |
| CN108116507B (en) * | 2017-12-29 | 2023-10-20 | 无锡曙光模具有限公司 | Automobile front windshield lower beam cover plate and processing method thereof |
| CN108581380A (en) * | 2018-04-20 | 2018-09-28 | 北京航星机器制造有限公司 | A kind of aluminum alloy complex abnormal curved surface structural member precision plastic forming method |
| CN108993016A (en) * | 2018-08-13 | 2018-12-14 | 宝鸡华光铸造材料科技有限公司 | A kind of filter for casting and filter head housings production method |
| CN111644856A (en) * | 2020-06-04 | 2020-09-11 | 新乡市合众鑫辉车业有限公司 | Carriage plate integrated door forming device and using method thereof |
| CN112077540A (en) * | 2020-09-09 | 2020-12-15 | 武汉市尚佳盛汽车配件有限公司 | Engine appearance part machining process |
| CN112658088B (en) * | 2021-01-04 | 2022-01-21 | 中国航空制造技术研究院 | Thermal forming method for titanium alloy thin-wall small-angle curved surface flanging |
| CN112658088A (en) * | 2021-01-04 | 2021-04-16 | 中国航空制造技术研究院 | Thermal forming method for titanium alloy thin-wall small-angle curved surface flanging |
| CN114273547A (en) * | 2021-12-31 | 2022-04-05 | 浙江金固股份有限公司 | Processing method of reinforcing rib of spoke |
| CN114273547B (en) * | 2021-12-31 | 2024-01-23 | 浙江金固股份有限公司 | Processing method of reinforcing rib of spoke |
| CN114700687A (en) * | 2022-03-16 | 2022-07-05 | 无锡曙光精密工业有限公司 | Production method of automobile armrest support plate and support plate structure |
| CN115007744A (en) * | 2022-08-08 | 2022-09-06 | 宁波沃特汽车部件有限公司 | Bidirectional bending forming process of reinforcing plate |
| CN115007744B (en) * | 2022-08-08 | 2022-10-25 | 宁波沃特汽车部件有限公司 | Bidirectional bending forming process of reinforcing plate |
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Application publication date: 20171024 |