CN114101477B - Processing method of large-deformation flanging bending connecting plate - Google Patents
Processing method of large-deformation flanging bending connecting plate Download PDFInfo
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- CN114101477B CN114101477B CN202111394723.0A CN202111394723A CN114101477B CN 114101477 B CN114101477 B CN 114101477B CN 202111394723 A CN202111394723 A CN 202111394723A CN 114101477 B CN114101477 B CN 114101477B
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/003—Simultaneous forming, e.g. making more than one part per stroke
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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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
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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
- 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
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
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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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a processing method of a large-deformation flanging bending connecting plate, which adopts a polygonal plane plate, and firstly completes the bending of a first flanging and the bending of a curved surface on the first flanging in a primary stretching process by a stretching deformation method to form a flanging bending connecting plate semi-finished product; and then bending the second bent edge and the third bent edge on the formed semi-finished product of the bent edge bending connecting plate at one time by adopting a bending method. Aiming at the conditions of wrinkles and cracks caused by bending deformation in the folded edge, the invention solves the problem of part cracks caused by bending in common bending at one time by improving the bending mode with the bending molded surface, ensures the flat state of the bending surface and provides a better positioning basis for the subsequent re-folding edge.
Description
Technical Field
The invention belongs to the technical field of sheet metal forming, in particular to a method for forming thin-wall sheet metal, which is particularly used for realizing bending forming of a three-fold surface forming structure with large bending deformation and solving the problem of cracks in the large-deformation bending method.
Background
The connecting plate (shown in figure 1) is a stainless steel sheet metal forming part in the aeroengine component and is mainly used for connecting the bottom surface of the guide rail part, the skin and the front cover, and the surfaces of the connected parts are in different directions, so that the connecting plate is special in shape and is respectively bent in different directions, and three bending edges are respectively connected with the edges of a triangular plane substrate (wall surface) to form a sheet forming structure with multiple bending edges. Triangle-like (or shaped triangle) herein refers to a traditional triangle that has two straight sides and one curved side in three edges of a planar substrate, and is not three straight sides.
Three bending edges (a first bending edge, a second bending edge and a third bending edge) in the connecting plate are in a vertical state with a plane substrate similar to a triangle, wherein two bending edges at the straight edge are in a plane state, the deformation of the plate at the position belongs to a pure bending shape, the bending edge of a triangle hypotenuse (a curve edge) not only has a straight surface (a plane), but also has secondary bending deformation at two ends of the straight surface (the plane) to form a curved surface, the deformation of the whole molded surface is in a multidimensional forming state, the deformation length is large, and the deformation at the position is easy to generate a cracking crack.
The traditional processing method is that a bending belt is bent twice, a flat plate material with a certain shape is unfolded according to the shape of a part, the plate material is placed on a shaping block with a bending surface, the plate material is bent into a circular arc edge shape under the pressing of two shaping blocks, then the two shaping blocks move together, and the side surface of the shaping block and the wall surface of the other shaping block are utilized to generate a turning edge shape; the bending mode of the bending die (shown in fig. 2) is either bending at one side, bending at the same time or bending at the first side and then bending, and the bending deformation pulls the material at the folded edge, so that the joint of the bending arc R and the folded edge is torn, and the product cannot be bent into the required shape.
In order to solve the technical bottleneck of multi-edge-folded part processing with a bent molded surface, a novel process method is required to be provided, the profile outline size requirement can be guaranteed by the method, the arc and edge folding are also completely maintained at the secondary bent position, no crack appears, and the design requirement of a product is completely met.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a processing method of a bending connecting plate of a large deformation flanging, which aims at improving the processing method of a multi-flanging part with a bending profile of the bending connecting plate of the large deformation flanging, particularly solves the problem of part cracking caused by bending in a common bending by improving the bending mode of the bending profile and ensures the flat state of the bending surface, and provides a better positioning basis for subsequent re-flanging.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the processing method of the large-deformation flanging bending connecting plate comprises a triangular plane substrate, wherein three edges of the plane substrate are respectively and vertically connected with a first flanging, a second flanging and a third flanging, the first flanging comprises a curved surface, the second flanging and the third flanging are planes,
firstly, bending a first bending edge and bending a curved surface on the first bending edge in a primary stretching process by adopting a polygonal plane plate through a stretching deformation method to form a bending edge bending connecting plate semi-finished product;
and step two, bending the second bent edge and the third bent edge on the semi-finished product of the bent edge bending connecting plate formed in the step one at one time by adopting a bending method.
The processing method of the large-deformation flanging bending connecting plate further comprises a third step, wherein in the third step, the flanging bending connecting plate formed in the second step is placed on a tire with the outline of the standard flanging bending connecting plate, the size of the molded surface is checked, the outline of the outer edge of the flanging bending connecting plate is drawn along the outer edge of the tire by a drawing needle, and redundant edges are cut off by a mechanical method.
In the first step, a stretching die used for stretching and deforming the first bent edge comprises a blank holder, wherein the blank holder is used for pressing the lower surface of the polygonal planar plate;
the upper die is a female die, and the inner wall of the female die is used as a first molding surface of the first bent edge;
the lower die is a male die, the outer wall of the male die is a second molding surface matched with the inner wall of the female die and used for the first bent edge, and when the male die is combined with the female die, a lateral gap is formed between the second molding surface of the male die and the first molding surface of the female die;
when the inner wall of the female die and the outer wall of the male die move in opposite directions, the polygonal plane plate is bent and deformed under the stretching action and enters the lateral gap, and finally, the curved surface bending and the edge bending deformation of the first bending edge are finished at one time under the action of the inner wall and the outer wall.
Alternatively, the stretching die further comprises a positioning pin arranged on the binder ring for closely contacting with the contour edge of the polygonal planar sheet material.
Alternatively, the female die and the male die are both in a bilateral symmetry structure, and two folding bending connecting plate semi-finished products are formed in one stretching deformation process of the stretching die.
Alternatively, in the second step, the bending die used for bending the second bending edge and the third bending edge includes,
an upper platform and a lower platform;
the lower die frame is positioned on the lower platform;
the ejection block is movably connected in the lower die frame, and the upper molded surface of the ejection block is used for pressing the lower surface of the plane part of the folded bending connecting plate semi-finished product;
the upper male die is connected to the upper platform, and the lower profile of the upper male die is used for pressing the upper surface of the plane part of the folded bending connecting plate semi-finished product.
Further, when the upper surface and the lower surface of the plane part of the semi-finished product of the folding bending connecting plate are respectively pressed by the upper male die and the ejection block, the upper platform and the lower platform move relatively, the folding bending connecting plate semi-finished product is pulled into a gap between the upper male die and the lower die from the surface of the lower die on the outer side, and the second bending edge and the third bending edge on the folding bending connecting plate semi-finished product are formed by extrusion of the outer surface of the upper male die and the inner side surface of the lower die.
As an option, the lower die frame, the ejection block and the upper male die are all of a bilateral symmetry structure, and two folding bending connecting plate semi-finished products are bent in one bending process.
Alternatively, the contour edge of the polygonal planar plate comprises a zigzag edge and a third straight line edge, two ends of the zigzag edge are respectively a first straight line edge and a second straight line edge, the first straight line edge and the second straight line edge are parallel to each other, and the third straight line edge with a right angle notch is opposite to the zigzag edge.
Compared with the original bending forming method, the forming method of the improved bending connecting plate for the folded edge obviously improves the deformation capacity of the bent folded edge plate with bending, converts bending deformation into stretching deformation, avoids buckling and wrinkling of the wall surface caused by mutual pulling of the plate by bending and folding, and effectively solves the problems of wrinkling and tearing of the bending folded edge with large deformation caused by overlarge material deformation due to large length dimension of the bending surface.
The practical verification shows that the bending and bending forming effect of the invention shows that the formed connecting plate part has flat shape, accurate bending dimension, clear profile outline and no scrapping, and compared with the original forming method, the method has the advantages that the bending and the rubber pre-pressing are needed for a plurality of times, the pressure test is repeated, and the qualification rate of the final part is still low, thus proving that the invention has successful improvement and has innovation value and popularization and application significance.
Drawings
FIG. 1 is a perspective view of a large deformation hemmed bent connection plate of the present invention;
FIG. 2 is a schematic diagram of a conventional bending die;
FIG. 3 is a blank view of a sheet of the part of the present invention;
FIG. 4 is a drawing of a drawing die of the present invention;
FIG. 5 is a schematic view of a semi-finished web of the present invention;
FIG. 6 is a schematic view of a secondary bending die according to the present invention;
FIG. 7 is a top view of the lower mold frame, lower platform, and ejector block of FIG. 6;
FIG. 8 is a schematic view of a cut-off tire;
FIG. 9 is a schematic view of a lower platform;
FIG. 10 is a schematic view of an ejector block;
FIG. 11 is a schematic view of a lower mold frame;
FIG. 12 is a schematic view of an upper punch;
in the figure, the lower die plate 1, the blank holder 2, the guide post 3, the guide sleeve 4, the upper die plate 5, the male die 6, the female die 7, the locating pin 8, the ejector rod 9, the folding bending connecting plate semi-finished product 10, the lower platform 11, the lower die frame 12, the ejection block 13, the upper male die 14 and the upper platform 15.
Detailed Description
The present invention will be further described with reference to the drawings and the specific embodiments, but it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made according to the ordinary skill and familiar means of the art to which this invention pertains are included within the scope of the present invention without departing from the above technical idea of the invention.
The invention aims to meet the technical requirements of the structure of the product with bending and large deformation by changing the existing processing thought.
The processing method of the connecting plate with bending and large deformation generally adopts a twice forming mode to divide three folds into two times forming, firstly adopts a stretching structure with a pressing edge to realize the folded fold shape with bending (a first folded fold), and then adopts a bending die with a pressing mode to complete the simple folded fold shape (a second folded fold and a third folded fold).
According to the shape and size of the bending arc and the wall surface of the large-deformation folded bending connecting plate, as shown in fig. 3, the large-deformation folded bending connecting plate is unfolded to be in a Z-shaped shape at the upper side, a rectangular plane plate (the left side and the right side are two parallel straight sides) with a right angle notch is arranged at the lower right corner of the lower side, and the plate is cut into the shape by adopting a mechanical cutting method.
The stretching die is arranged between an upper die plate 5 and a lower die plate 1 of the hydraulic press, an upper ejector rod 9 is arranged in an ejector rod hole in the lower die plate 1, and the upper end of the ejector rod 9 is tightly attached to the lower surface of the blank holder 2 after passing through the ejector rod hole; the ejection function of the hydraulic press is started to eject the ejector rod 9 until the upper surface of the blank holder 2 is higher than the upper surface of the male die 6. The cut plate is placed on a blank holder 2 of a die of a stretching structure and is placed at a proper position (the position of the plate is limited by a plurality of positioning pins 8 on the blank holder 2 in the embodiment), a bent part is lapped on the surface of a male die 6 (namely, the edge contour of the male die 6 approximately corresponds to the boundary edge position of a first bent edge and a plane substrate), the plate is accurately positioned under the compression of the lower surface of a female die 7 and the upper surface of the blank holder 2, the female die 7 part moves downwards along with an upper die plate 5 of the device (the upper die plate 5 and the lower die plate 1 are connected and guided by a guide post 3 and a guide sleeve 4), the bent part corresponding to the first bent edge on the plate is bent and deformed under the combined action of the inner wall of the female die 7 and the outer wall of the male die 6 and enters a gap between the female die 7 and the male die 6, and finally, the bending and edge bending processes are completed at one time under the action of the inner wall and the outer wall of the die. In this embodiment, the female die 7 and the male die 6 are both symmetrically designed, so that the female die 7 and the male die 6 can be clamped once to complete two folded bending connection plate semi-finished products 10.
The other two folds (a second fold and a third fold) of the connecting plate are formed by adopting a two-piece bending die on the basis of folding the semi-finished product 10 of the folding bending connecting plate.
The above-mentioned semi-finished product 10 of the hemmed bending connection board after the first bending edge bending forming is reliably positioned on the surface of the ejection block 13 of the bending die (as shown in fig. 10, the inner surface B of the ejection block 13 is used for the first bending edge surface attaching positioning of the semi-finished product of the hemmed bending connection board, the upper surface a is used for the triangle-like plane matrix attaching positioning of the semi-finished product of the hemmed bending connection board), the upper surface (the upper surface a in fig. 10) of the ejection block 13 and the lower surface (the triangle-like plane matrix portion in fig. 1) of the upper punch 14 are pressed against the plane portion (the triangle-like plane matrix portion in fig. 1) of the semi-finished product of the hemmed bending connection board), the ejection block 13 (fig. 10) is placed inside the lower die frame 12 (fig. 11), the lower die frame 12 is placed on the lower platform 11 (fig. 9), and the lower platform 11 is also provided with a jacking rod for jacking the ejection block 13 from the lower die frame 12, as the upper platform 15 moves down with the upper punch 14, the plate material is pulled from the outer surface of the lower die frame 12 into the gap between the upper punch 14 and the lower die frame 12, and the second hemmed bending edge forming is realized by once extrusion of the inner side of the outer surface of the upper die frame 12.
As shown in fig. 8, the bent part is placed on a mold with the outline of the part, the profile size of the part is checked, the outline of the outer edge of the part is drawn along the outer edge of the mold by a drawing needle, and the redundant edge of the part is cut off by a mechanical method to finish the final processing of the part.
As shown in fig. 1, 3-12, the processing device for the large-deformation flanging bending connecting plate comprises a set of stretching die and a set of bending die for the connecting plate, and the specific processing steps are as follows:
1. a flat plate material with the thickness of 1.2 is processed into a flat nearly rectangular plate material with a Z-shaped upper edge (used for a first bent edge) and a right-angle notch (used for dividing a second bent edge and a third bent edge) at the lower right corner by adopting a mechanical cutting mode, and the flat plate material is used as a blank material of a part (figure 3).
2. A stretching die (figure 4) for simultaneously bending and flanging which is used for forming the first side is arranged on a hydraulic machine platform, a platform hole is aligned with a mandril hole of a lower template 1, the lower template 1 is fixed on the lower platform of the hydraulic machine, an upper template 5 is partially fixed on the upper platform by the same method, the upper template 5 and the lower template 1 are connected in a guiding way through a guide post 3 and a guide sleeve 4, a female die 7 is connected on the upper template 5, and a blank holder 2 and a male die 6 are connected on the lower template 1.
3. The hydraulic press is started, the upper platform moves upwards, the upper template 5 and the female die 7 are driven to move upwards together, the female die 7 is separated from the male die 6, the ejector rod 9 device is started, and the blank holder 2 is lifted to be flush with the upper surface of the male die 6.
4. The blank plate cut in the step 1 is placed at a proper position on the blank holder 2, the position is determined by a positioning pin 8, a hydraulic press is started to move downwards, the lower surfaces of the upper die plate 5 and the female die 7 and the upper surface of the blank holder 2 are jointly pressed against the blank plate to move downwards together, the blank plate is fixed by the pressed part, the rest part is stretched along the inner walls of the male die 6 and the female die 7 under the joint extrusion of the outer wall (the second molding surface) of the male die 6 and the inner wall (the first molding surface) of the female die 7, the deformation of the bending shape is completed in the gap between the male die 6 and the female die 7, the folded edge is formed by the pressed part and the bending part in the downward moving process of the die, and the process requirement of one-time completion of bending and folded edge is realized.
5. After the first bending edge is formed, the female die 7 moves upwards until the female die is separated from the male die 6, the bending and flanging processes of the part are completed, and the part of the flanging bending connecting plate semi-finished product 10 (figure 5) is taken out.
6. The secondary bending die (fig. 6 and 7) is installed, the upper platform 15 and the lower platform 11 are also installed on the hydraulic equipment, the lower die frame 12 is installed on the lower platform 11, the ejection block 13 is installed in the lower die frame 12, and the ejection block 13 in the lower die frame 12 is ejected through the lower platform 11 by adopting an ejection rod until the top surface of the ejection block 13 exceeds the top surface of the lower die frame 12.
7. The prefabricated hemmed and bent web blank 10 is placed on a positioning profile in the ejector block 13 (as shown in fig. 10, the upper surface a of the ejector block 13 is used for a planar portion of the hemmed and bent web blank 10, particularly a triangular planar base portion, and the inner surface B of the ejector block 13 is used for a first hemmed edge profile of the hemmed and bent web blank 10), and the remaining planar surface is attached to the upper surface of the lower die frame 12.
8. The upper punch 14 (fig. 12) moves downwards under the drive of the upper platform 15, the protruding part of the upper punch 14 is gradually attached to the ejection block 13, the hemming curved connecting plate semi-finished product 10 is pressed onto the surface of the ejection block 13, the middle plane of the upper punch 14 is pressed onto the plane part of the hemming curved connecting plate semi-finished product 10 along with the continuous downward movement of the upper punch 14, then the plane part of the upper punch 14 is attached to the upper surface of the ejection block 13, the plane part of the upper punch and the plane part of the middle plane of the upper punch are moved downwards together and enter the lower die frame 12, the two outer sides of the hemming curved connecting plate semi-finished product 10 are bent and deformed under the action of the inner side wall of the lower die frame 12 and the outer side wall of the upper punch 14, and enter a gap formed by the side surfaces of the lower die frame 12 and the upper punch 14, and the bending deformation of the second hemming and the third hemming is completed until the whole surface enters the lower die frame 12.
9. When the upper punch 14 is started and lifted to be completely separated from the lower die frame 12, the ejection block 13 is ejected by the ejection rod until the part is exposed out of the lower die frame 12, and the part with the allowance is taken out.
10. The part with the allowance is placed on a cutting type tyre (figure 7), a cutting line is marked on the edge surface of the part by a scriber according to the outline edge of the tyre, and then the allowance outside the part is cut off by a mechanical method according to the cutting line, so that the processing and the delivery of the part are completed.
Claims (6)
1. The utility model provides a processing method of bending connecting plate of large deformation hem, bending connecting plate of hem includes the plane base member of class triangle-shaped, has perpendicularly connected first bent edge, second bent edge and third bent edge respectively on three edges of plane base member, and wherein, first bent edge contains the curved surface, and second bent edge and third bent edge are the plane, its characterized in that: the processing method comprises the steps of,
firstly, bending a first bending edge and bending a curved surface on the first bending edge in a primary stretching process by adopting a polygonal plane plate through a stretching deformation method to form a bending edge bending connecting plate semi-finished product;
step two, bending a second bent edge and a third bent edge on the semi-finished product of the bent edge bending connecting plate formed in the step one at one time by adopting a bending method;
the outline edge of the polygonal planar plate comprises a Z-shaped edge and a third straight line edge, wherein the two ends of the Z-shaped edge are respectively a first straight line edge and a second straight line edge, the first straight line edge and the second straight line edge are mutually parallel, and the third straight line edge with a right-angle notch is opposite to the Z-shaped edge;
in the first step, the stretching die used for stretching and deforming the first bent edge comprises,
the blank holder is used for pressing the lower surface of the polygonal planar plate;
the upper die is a female die, and the inner wall of the female die is used as a first molding surface of the first bent edge;
the lower die is a male die, the outer wall of the male die is a second molding surface matched with the inner wall of the female die and used for the first bent edge, and when the male die is combined with the female die, a lateral gap is formed between the second molding surface of the male die and the first molding surface of the female die;
the positioning pin is arranged on the blank holder and used for being in close contact with the contour edge of the polygonal planar plate;
when the inner wall of the female die and the outer wall of the male die move in opposite directions, the polygonal plane plate is bent and deformed under the stretching action and enters the lateral gap, and finally, the curved surface bending and the edge bending deformation of the first bending edge are finished at one time under the action of the inner wall and the outer wall.
2. The method for processing the large-deformation hemming bending connecting plate according to claim 1, wherein the method comprises the following steps: and step three, in which the folded bending connecting plate formed in the step two is placed on a tire with the outline of the standard folded bending connecting plate, the size of the molded surface is checked, the outline of the outer edge of the folded bending connecting plate is drawn along the outer edge of the tire by a drawing needle, and the redundant edge is cut off by a mechanical method.
3. The method for processing the large-deformation hemming bending connecting plate according to claim 1, wherein the method comprises the following steps: the female die and the male die are of bilateral symmetry structures, and two folding bending connecting plate semi-finished products are formed in one stretching deformation process of the stretching die.
4. The method for processing the large-deformation hemming bending connecting plate according to claim 1, wherein the method comprises the following steps: in the second step, the bending die adopted in bending the second bending edge and the third bending edge comprises,
an upper platform and a lower platform;
the lower die frame is positioned on the lower platform;
the ejection block is movably connected in the lower die frame, and the upper molded surface of the ejection block is used for pressing the lower surface of the plane part of the folded bending connecting plate semi-finished product;
the upper male die is connected to the upper platform, and the lower profile of the upper male die is used for pressing the upper surface of the plane part of the folded bending connecting plate semi-finished product.
5. The method for processing the large-deformation hemming-bent connecting plate according to claim 4, wherein: when the upper surface and the lower surface of the plane part of the semi-finished product of the flanging bending connecting plate are respectively pressed by the upper male die and the ejection block, the upper platform and the lower platform move relatively, the flanging bending connecting plate semi-finished product is pulled into a gap between the upper male die and the lower die from the surface of the lower die on the outer side, and the second flanging and the third flanging on the flanging bending connecting plate semi-finished product are formed by extrusion through the outer surface of the upper male die and the inner side surface of the lower die.
6. The method for processing the large-deformation hemming-bent connecting plate according to claim 4, wherein: the lower die frame, the ejection block and the upper male die are all of bilateral symmetry structures, and two folding bending connecting plate semi-finished products are bent in one bending process.
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| CN202111394723.0A CN114101477B (en) | 2021-11-23 | 2021-11-23 | Processing method of large-deformation flanging bending connecting plate |
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| CN202111394723.0A CN114101477B (en) | 2021-11-23 | 2021-11-23 | Processing method of large-deformation flanging bending connecting plate |
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| CN101062512A (en) * | 2006-04-30 | 2007-10-31 | 顾晓隆 | Combined mould for manufacturing stainless steel antiskid pedal and its method |
| CN103008451A (en) * | 2013-01-04 | 2013-04-03 | 芜湖开瑞金属科技有限公司 | Processing technique for automobile support arm module |
| CN103934381A (en) * | 2014-04-15 | 2014-07-23 | 宁波沃特汽车部件有限公司 | Automobile high-strength board chassis component forming technology |
| JP2018187669A (en) * | 2017-05-11 | 2018-11-29 | 日産自動車株式会社 | Sequential molding method |
| CN210586732U (en) * | 2019-08-28 | 2020-05-22 | 上海实树汽车工程技术有限公司 | Flanging die for trial-manufacturing automobile fender |
| CN214601442U (en) * | 2020-12-29 | 2021-11-05 | 贵州精立航太科技有限公司 | Bending forming die of hanging block |
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| CN114101477A (en) | 2022-03-01 |
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