CN113319172A - Method for eliminating bending of flanging vertical wall of high-strength plate stamping part - Google Patents
Method for eliminating bending of flanging vertical wall of high-strength plate stamping part Download PDFInfo
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- CN113319172A CN113319172A CN202110508584.3A CN202110508584A CN113319172A CN 113319172 A CN113319172 A CN 113319172A CN 202110508584 A CN202110508584 A CN 202110508584A CN 113319172 A CN113319172 A CN 113319172A
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- flanging
- vertical wall
- bending
- strength plate
- stamping part
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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
- B21D19/12—Edge-curling
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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
- B21D22/02—Stamping using rigid devices or tools
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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
Abstract
The invention relates to a method for eliminating the flanging vertical wall bending of a high-strength plate stamping part, which comprises reasonable material pressing control, reasonable flanging gap and process modeling of a flanging male die body, wherein the process modeling is added on the gap surface of the flanging male die vertical wall, ridge line fillets on two sides of the process modeling are in natural transition, the length of a process modeling convex circle is the total length of the flanging vertical wall bending of the high-strength plate stamping part, the width of the process modeling convex circle is the flanging vertical wall bending width of the high-strength plate stamping part, the height of the process modeling convex circle is 1/5 of the plate thickness, the reasonable gap of flanging is the plate thickness of the high-strength plate stamping part plus the flanging coefficient value, and the reasonable flanging gap and the process modeling of the flanging male die body jointly act on the flanging vertical wall of the high-strength plate stamping part. The invention can solve the problem of bending of the flanging vertical wall of the existing high-strength plate stamping part, and improve the quality of a single piece stamped by the high-strength plate, thereby improving the quality of the whole vehicle.
Description
Technical Field
The invention belongs to the technical field of vehicle engineering, and particularly relates to a method for eliminating the bending of a flanging vertical wall of a high-strength plate stamping part.
Background
With the continuous development of the automobile industry, the quality requirement of the high-strength plate stamping part is higher and higher, and in order to ensure the manufacturability and usability of the high-strength plate stamping part, the flanging process is a conventional process design. Many times, the defects of extension type or compression type flanging rebound occur after the flanging of the high-strength plate stamping part, and the phenomenon of bending of the vertical wall after the flanging occurs at the flanging position of the high-strength plate stamping part.
The prior art discloses a structure of kick-backing is prevented to turn-ups mould, include: an upper die; the lower die comprises a lower die body and mounting plates, the two mounting plates are fixedly mounted on two sides of the lower die body respectively, an opening preventing mechanism for preventing a workpiece from being opened outwards is mounted in each mounting plate, the opening preventing mechanism is rotatably connected with the mounting plates, and a guide hole is formed in the lower die body; the ejection mechanism is arranged in the guide hole and is positioned below the opening prevention mechanism; the opening prevention mechanism is provided with a first binding surface, the lower die body is provided with a second binding surface, and the first binding surface is bound with the second binding surface during stamping; the mounting plate is also provided with a limiting plate for limiting the anti-opening mechanism, and when the stamping is finished, the ejection mechanism jacks up the anti-opening mechanism and enables the anti-opening mechanism to be in contact with the limiting plate. The edge of the workpiece keeps unchanged in shape after being turned over, and the workpiece cannot be opened outwards, so that the product quality requirement is met, and the product quality is improved.
The prior art also discloses a novel flanging mechanism capable of effectively controlling springback, which comprises a mounting seat fixed with a die, wherein the mounting seat is provided with a flanging mechanism and a pre-flanging seat matched with the flanging mechanism, the flanging mechanism comprises a rotary through groove which is arranged at the inner corner of the pre-flanging seat and has a circular cross section and a flanging rotating shaft which is arranged in the rotary through groove and has a cylindrical structure, the flanging rotating shaft is sleeved in the rotary through groove, the circumferential surface of the flanging rotating shaft is provided with a pre-flanging edge which is arranged along the axial direction of the flanging rotating shaft and has a fan-shaped cross section, and the pre-flanging edge protrudes outside the rotary through groove by means of a notch of the rotary through groove; the moment is preliminarily bent when the pre-flanging block is in small-area contact with a workpiece to increase flanging, and the required flanging position is flanged by the flanging rotating shaft, so that surface damage caused by one-step flanging forming is avoided; and can reserve turn-ups angle through the thickness adjustment of adjustment gasket, easy operation.
The prior art also discloses a rebound prevention flanging die, which comprises an upper die base, a flanging female die and a material pressing core which are arranged on the upper die base, and a flanging male die arranged on the lower die base, wherein the working part of the flanging female die comprises a pre-flanging part and a flanging forming part, and the vertical distance from the flanging forming part to the working surface of the flanging male die is equal to the thickness of a plate. When flanging is carried out on a plate, one-time bending forming in the traditional technology is changed into two-stage bending forming, flanging forming is realized, a pre-flanging part is firstly contacted with the plate in the first stage, and a flanging female die continues to move downwards to enable the pre-flanging part to generate bending deformation; and the flanging forming part at the second stage starts to be in contact with the plate, and the flanging female die continues to move the flanging forming part downwards to further bend the plate until the requirement of plate flanging is met. The technical form of the invention is equivalent to a general shaping procedure, and the defects of flanging rebound, outward warping and the like of the plate can be overcome on the premise of not changing the structure of the original product.
However, the above prior art is not suitable for overcoming the flanging vertical wall bending of the high-strength plate stamping. Meanwhile, the prior art optimizes the bending of the flanging vertical wall by reducing the flanging gap and enlarging the flanging female die fillet after reasonable material pressing control. As shown in fig. 1 and 2, the bending of the flange vertical wall cannot be completely eliminated. Therefore, the bending problem of the flanging vertical wall of the high-strength plate stamping part has no effective solution.
Disclosure of Invention
The invention aims to provide a method for eliminating the bending of the flanging vertical wall of a high-strength plate stamping part, which is used for solving the problem of the bending of the flanging vertical wall of the traditional high-strength plate stamping part and can improve the quality of a single stamping part, thereby improving the quality of the whole automobile.
The purpose of the invention is realized by the following technical scheme:
a method for eliminating the bending of a flanging vertical wall of a high-strength plate stamping part is characterized by comprising the following steps:
A. under the premise of reasonable material pressing control, a process model is added on a vertical wall clearance surface 2 of a flanging male die body 1, and convex round corners are arranged on the flanging male die body 1 and ridge lines on two sides of the process model;
B. determining the length, width and height of the process modeling: the length of the process modeling is the total length of the flanging vertical wall bending of the high-strength plate stamping part, the width of the process modeling is the flanging vertical wall bending width of the high-strength plate stamping part, the width is the width between the bending starting point 3 and the bending ending point 4 of the flanging vertical wall, and the height of the process modeling is 1/5 of the thickness of the plate;
C. selecting a reasonable flanging gap, wherein the reasonable flanging gap is the thickness of the plate material of the high-strength plate stamping part plus the value of a flanging coefficient, and the vertical wall gap surface 6, the convex round angle, the reasonable flanging gap of the flanging female die body 5 and the technological modeling of the flanging male die body 1 act together to eliminate the phenomenon of uneven plastic deformation of the outer surface 9 and the inner surface 10 of the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part;
D. and selecting the modeling position according to the flanging vertical wall bending area in the simulation analysis or the flanging vertical wall bending area in the high-strength plate stamping object.
Further, in the step A, the position of the vertical wall clearance surface 2 of the flanging male die body 1 for increasing the process modeling is arranged in parallel at the center O position of the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part in the simulation analysis.
And step A, two convex round corners of the edge lines on the two sides of the process modeling are both parabolic round corners for natural transition.
More closely, step A, the smaller the values of the two convex fillets of the ridge lines on the two sides are, the better the effect of offsetting the tangential compressive stress after material contact and the uniform state of plastic deformation are, and the better the bending and unfolding effect is.
Further, in the step A, the convex round angles of the flanging male die body 1 and the flanging female die body 5 are CAE analysis set values.
Further, in the step B, the height H of the process modeling is 1/5 × T, the reasonable flanging gap is X, which is the vertical distance between the vertical wall gap surface 2 of the flanging male die body 1 and the vertical wall gap surface 6 of the flanging female die body 5, X is T + C, wherein T is the material thickness, and C is the flanging coefficient value.
Further, in the step C, when the bending starting point 3 of the flanging vertical wall 7 of the high-strength plate stamping part contacts the ridge line convex round angle of the process modeling, the inner surface 10 of the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part is extruded by the ridge line convex round angle of the process modeling, and the radial tensile stress generated by the ridge line convex round angle of the process modeling to the component force of the radial compressive stress of the plate material offsets part of the tangential compressive stress.
And D, selecting a fixed molded surface of the bent area of the flanging vertical wall or the bent area of the flanging vertical wall in the high-strength plate stamping object at the molding position.
Compared with the prior art, the invention has the beneficial effects that:
the method for eliminating the bending of the flanging vertical wall of the high-strength plate stamping part can solve the problem of the bending of the flanging vertical wall of the existing high-strength plate stamping part, and improve the quality of a single piece stamped by the high-strength plate, thereby improving the quality of the whole automobile.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a sectional view of a flanging vertical wall of a high-strength plate stamping part in a bending state in the prior art;
FIG. 2 is a front view of a flanging upright wall of a high-strength plate stamping part in a bending state in the prior art;
FIG. 3 is a schematic cross-sectional view of the present invention for eliminating the bending of the flanging standing wall of the high-strength plate stamping;
FIG. 4 is a front view of the technological modeling provided on the flanging male die body according to the present invention;
FIG. 5 is a cross-sectional view of an embodiment of the present invention;
FIG. 6 is a front view of the technological modeling arranged on the flanging male die body in the embodiment of the invention.
In the drawing, 1, a flanging male die body 2, a vertical wall clearance surface 3 of the flanging male die body, a flanging vertical wall bending starting point 4, a flanging vertical wall bending finishing point 5, a flanging female die body 6, a vertical wall clearance surface 7 of the flanging female die body, a high-strength plate stamping part flanging vertical wall 8, a high-strength plate stamping part flanging vertical wall bending area 9, an outer surface 10 and an inner surface are included.
Detailed Description
The invention is further illustrated by the following examples:
the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-6, wherein a is a process modeling; r0 is a convex round angle of the flanging male die body; R1/R2 are convex fillets of ridge lines at two sides of the craft modeling; l is the length of the process modeling; l0 is the total length of the bend of the flanging vertical wall of the high-strength plate stamping part; b0 is the bending width of the flanging vertical wall of the high-strength plate stamping part; b is the width of the process modeling; h is the height of the process modeling; t is the thickness of the plate; x is a reasonable flanging gap; c is the flanging coefficient value; r is a convex fillet of the flanging female die body; and O is the central position of the flanging vertical wall bending area of the high-strength plate stamping part. As shown in figures 3 and 4, the method for eliminating the flanging vertical wall bending of the high-strength plate stamping part comprises the steps of reasonably matching a reasonable flanging gap with the process model of the flanging male die body on the premise of reasonable pressure control, and is characterized in that the process model A is added on the vertical wall gap surface 2 of the flanging male die body 1, the convex fillet R0 of the flanging male die body 1, the convex fillet R1 and the convex fillet R2 of the edge line at two sides of the process model A, the length L of the process model is the total length L0 of the flanging vertical wall bending of the high-strength plate stamping part, the width between the flanging vertical wall bending starting point 3 and the end point 4 is the vertical wall bending width B0, the width B of the process model is the flanging vertical wall bending width B0 of the high-strength plate stamping part, the height H of the process model is 1/5 of the plate thickness T, the reasonable flanging gap X is the plate thickness T plus the flanging C, the vertical wall clearance surface 6 of the flanging female die body 5, the convex round angle R of the flanging female die body 5, the reasonable flanging clearance X and the process modeling A of the flanging male die body 1 jointly act to eliminate the phenomenon of uneven plastic deformation of the outer surface 9 and the inner surface 10 of the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part. And selecting the modeling position according to the flanging vertical wall bending area in the simulation analysis or the flanging vertical wall bending area in the high-strength plate stamping object, and preferably performing modeling setting on the fixed molded surface of the corresponding area.
Preferably, the position of the vertical wall clearance surface 2 of the flanging male die body 1 for increasing the process modeling A is arranged in parallel at the center O of the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part in the simulation analysis, and the material thickness is T. The length L of the process modeling A is L0, the width B of the process modeling A is B0, the height H of the process modeling A is 1/5 × T, and the reasonable flanging gap X is the vertical distance X between the vertical wall gap surface 2 of the flanging male die body 1 and the vertical wall gap surface 6 of the flanging female die body 5 is T + C. The edge line convex fillets R1 and the convex fillets R2 on the two sides of the craft modeling A are parabolic fillets in natural transition. The convex round angle R0 of the flanging male die body 1 is a CAE analysis set value, and the convex round angle R of the flanging female die body 5 is a CAE analysis set value.
The working principle and the using process of the invention are as follows:
as shown in fig. 1 and fig. 2, when the process modeling is not added, under the premise of reasonable material pressing control, the outer surface of the bending region of the flanging vertical wall is in contact with the convex round angle R0 of the flanging convex die body 1 under the action of the convex round angle R of the flanging concave die body 5, the sheet material in the flanging vertical wall region is elastically bent, the bending region of the flanging vertical wall is elastically and plastically deformed along with the continuation of the flanging forming process, and the sheet material in the flanging vertical wall region continuously slides into the reasonable flanging gap X under the extrusion action of the convex round angle R of the flanging concave die body, at this time, the sheet material in the bending region of the flanging vertical wall begins to generate the material gathering and bending phenomenon of the tangential compressive stress, the flanging forming is continued, the convex round angle R of the flanging concave die body continuously and unidirectionally extrudes the sheet material in the bending region of the flanging vertical wall, the unidirectional tensile stress of the outer surface is increased, and the unidirectional compressive stress of the inner surface is increased, the two functions simultaneously increase the tangential compressive stress of the flanging vertical wall area, after flanging is finished, the one-way elastic recovery of the outer side of the flanging vertical wall is large, and the residual bending recovery of the flanging vertical wall is serious.
As shown in fig. 3 and 4, on the premise of reasonable material pressing control, after the process model a is added, in the flanging and forming process of the plate material, under the action of the convex round angle R of the flanging female die body 5, the outer surface 9 of the bending region 8 of the flanging vertical wall 7 of the high-strength plate stamping part contacts the convex round angle R0 of the flanging male die body 1, and the plate material in the flanging vertical wall 7 region of the high-strength plate stamping part is elastically bent. Along with the continuation of the flanging forming process, elastic-plastic deformation occurs in the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part, and due to the extrusion effect of the convex fillet R of the flanging female die body 5, the plate material in the flanging vertical wall 7 area of the high-strength plate stamping part continuously slides into the reasonable flanging gap X, and at the moment, the plate material in the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part begins to generate the material gathering and bending phenomenon of tangential compressive stress. When the bending starting point 3 of the flanging vertical wall 7 of the high-strength plate stamping part contacts the ridge line convex fillet R1 of the process model A, the inner surface 10 of the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part is extruded by the ridge line convex fillet R1 of the process model A, and the radial tensile stress generated by the ridge line convex fillet R1 of the process model A to the component force of the radial compressive stress of the plate material offsets part of the tangential compressive stress. Under the action of a reasonable flanging gap X, the elastic deformation of the sheet material in the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part is more than the plastic deformation, when the bending end point 4 of the flanging vertical wall 7 of the high-strength plate stamping part contacts the ridge line convex fillet R2 of the process model A, the inner surface 10 of the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part is extruded by the ridge line convex fillet R2 of the process model A, the radial tensile stress generated by the ridge line convex fillet R2 of the process model A to the component force of the radial compressive stress of the sheet material offsets part of the tangential compressive stress, under the action of the reasonable flanging gap X, the plastic deformation of the sheet material in the bending area 8 of the flanging vertical wall 7 of the high-strength plate stamping part is more than the elastic deformation, the flanging molding is continued, and after the flanging female die body 5 is separated from the flanging male die body 1, the residual elasticity of the flanging vertical wall 7 of the high-strength plate stamping part is recovered, the bending phenomenon of the flanging vertical wall 7 of the high-strength plate stamping part disappears, and the bending problem of the flanging vertical wall of the high-strength plate stamping part is eliminated.
Example 1
As shown in figure 5 of the drawings, as shown in fig. 6, in this embodiment, on the premise of reasonable control of the flanging and pressing of the high-strength plate stamping part, a process model a is added to a clearance surface of a vertical wall of a lower die male die of the die, a fixed molded surface of a corresponding region is selected for a modeling position in a bending region of the flanging vertical wall in a high-strength plate stamping object, a convex fillet R0 of the flanging male die body 1, ridge line convex fillets R1 and convex fillets R2 on two sides of the process model a, a length L of the process model, a width B of the process model, a height H of the process model, and a reasonable flanging clearance X, which is a thickness T plus a flanging coefficient value C of the high-strength plate stamping part, a convex fillet R of the flanging female die body, and a reasonable flanging clearance and a technological modeling of the flanging male die body act together, so that a phenomenon of uneven plastic deformation of an outer surface and an inner surface of the bending region of the flanging vertical wall of the high-strength plate stamping part is eliminated, and a bending phenomenon of the flanging vertical wall is eliminated. The radius of curvature R0 is 3mm, radius of curvature R1 is 5mm, radius of curvature R2 is 5mm, the length L of technology molding is 580mm, the width B of technology molding is 10mm, the height H of technology molding is 0.2mm, the thickness T of sheet metal is 1.0mm, the flanging coefficient value C is 0.05mm, the reasonable flanging gap X is 1.0+0.05 mm, and the radius of curvature R is 3 mm. The smaller the values of R1 and R2 are, the better the effect of counteracting tangential pressure stress and the uniform state of plastic deformation after material contact are, and the better the bending and unfolding effect is, and finally, the flanging die structure of the upper body of the front subframe of the high-strength plate stamping part in the embodiment is optimized according to the process for increasing the clearance surface of the vertical wall of the lower die male die of the flanging die, and the bending defect of the vertical wall of the flanging is eliminated.
The invention provides a method for eliminating the bending of a flanging vertical wall of a high-strength plate stamping part, which comprises a reasonable flanging gap and a process model of a flanging male die body, wherein the process model is added on the gap surface of the flanging male die vertical wall, ridge fillets on two sides of the process model are in natural transition, the length of a convex circle of the process model is the total bending length of the flanging vertical wall of the stamping part, the width of the convex circle of the process model is the bending width of the flanging vertical wall of the stamping part, the height of the convex circle of the process model is 1/5 of the thickness of a plate, the reasonable flanging gap is the thickness of the plate of the stamping part plus the value of the flanging coefficient, and the reasonable flanging gap and the process model of the flanging male die body jointly act on the flanging vertical wall of the stamping part.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. A method for eliminating the bending of a flanging vertical wall of a high-strength plate stamping part is characterized by comprising the following steps:
A. under the premise of reasonable material pressing control, a process model is added on a vertical wall clearance surface (2) of a flanging male die body (1), and convex round corners are arranged on the flanging male die body (1) and ridge lines on two sides of the process model;
B. determining the length, width and height of the process modeling: the length of the process modeling is the total length of the flanging vertical wall bending of the high-strength plate stamping part, the width of the process modeling is the flanging vertical wall bending width of the high-strength plate stamping part, and is the width between a flanging vertical wall bending starting point (3) and a flanging vertical wall bending ending point (4), and the height of the process modeling is 1/5 of the thickness of the plate;
C. selecting a reasonable flanging gap, wherein the reasonable flanging gap is the sum of the thickness of the plate material of the high-strength plate stamping part and the flanging coefficient value, and the vertical wall gap surface (6), the convex round angle, the reasonable flanging gap and the technological modeling of the flanging male die body (1) of the flanging female die body (5) act together to eliminate the phenomenon of uneven plastic deformation of the outer surface (9) and the inner surface (10) of the bending area (8) of the flanging vertical wall (7) of the high-strength plate stamping part;
D. and selecting the modeling position according to the flanging vertical wall bending area in the simulation analysis or the flanging vertical wall bending area in the high-strength plate stamping object.
2. The method for eliminating the bending of the flanging vertical wall of the high-strength plate stamping part according to claim 1, is characterized in that: step A, the position of the vertical wall clearance surface (2) of the flanging male die body (1) for increasing the process modeling is arranged in parallel at the central O position of the bending area (8) of the flanging vertical wall (7) of the high-strength plate stamping part in the simulation analysis.
3. The method for eliminating the bending of the flanging vertical wall of the high-strength plate stamping part according to claim 1, is characterized in that: and step A, naturally transiting two convex round corners of the edge lines on the two sides of the process modeling into parabolic round corners.
4. The method for eliminating the bending of the flanging vertical wall of the high-strength plate stamping part according to claim 3, is characterized in that: and step A, the smaller the values of the two convex fillets of the ridge lines on the two sides are, the better the effect of offsetting the tangential pressure stress after material contact and the uniform state of plastic deformation are, and the better the bending and unfolding effect is.
5. The method for eliminating the bending of the flanging vertical wall of the high-strength plate stamping part according to claim 1, is characterized in that: and step A, convex round angles of the flanging male die body (1) and the flanging female die body (5) are CAE analysis set values.
6. The method for eliminating the bending of the flanging vertical wall of the high-strength plate stamping part according to claim 1, is characterized in that: and step B, the height H of the process modeling is 1/5 multiplied by T, the reasonable flanging gap is X, the vertical distance between the vertical wall gap surface (2) of the flanging male die body (1) and the vertical wall gap surface (6) of the flanging female die body (5) is T + C, T is the material thickness, and C is the flanging coefficient value.
7. The method for eliminating the bending of the flanging vertical wall of the high-strength plate stamping part according to claim 1, is characterized in that: and step C, when the bending starting point (3) of the flanging vertical wall (7) of the high-strength plate stamping part is in contact with the ridge line convex round angle of the technical model, the inner surface (10) of the bending area (8) of the flanging vertical wall (7) of the high-strength plate stamping part is extruded by the ridge line convex round angle of the technical model, and the radial tensile stress generated by the ridge line convex round angle of the technical model to the component force of the radial compressive stress of the plate material offsets part of the tangential compressive stress.
8. The method for eliminating the bending of the flanging vertical wall of the high-strength plate stamping part according to claim 1, is characterized in that: and D, selecting a fixed molded surface of the bent area of the flanging vertical wall or the bent area of the flanging vertical wall in the high-strength plate stamping object at the molding position.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115464023A (en) * | 2022-09-21 | 2022-12-13 | 中国第一汽车股份有限公司 | Technological method for optimizing roof skylight flanging surface waves |
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