CN117644141A - Solution method for raising edges of vertical flanging surface of side wall threshold of commercial vehicle - Google Patents
Solution method for raising edges of vertical flanging surface of side wall threshold of commercial vehicle Download PDFInfo
- Publication number
- CN117644141A CN117644141A CN202311646710.7A CN202311646710A CN117644141A CN 117644141 A CN117644141 A CN 117644141A CN 202311646710 A CN202311646710 A CN 202311646710A CN 117644141 A CN117644141 A CN 117644141A
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- CN
- China
- Prior art keywords
- edge
- template
- die
- flanging
- side wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000007493 shaping process Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a solution for raising edges of a side wall threshold vertical flanging surface of a commercial vehicle, belongs to the technical field of vehicle manufacturing, and solves the problem that the side wall threshold flanging surface raising edges cannot be solved in the prior art. It comprises the following steps: the lower drawing die is provided with a protruding part which corresponds to the over-drawing step of the upper drawing die; after the template is subjected to drawing operation, the flanging insert is matched with a drawing lower die to extrude the template, so that the tilted edges of the template are inwards bent around the convex parts and restrained into straight edges. When the flanging process is carried out after deep drawing, the flanging insert moves downwards to be in contact with the template, the warped template edge can form rotary motion by means of the highest point of the protruding part, so that the hardened warped edge rotates around the highest point of the protruding part, a similar shaping process is formed on the template edge, the bent edge is bent in the opposite direction of the warped edge, the warped edge shape is restrained to be a straight edge, the problem of template edge warping is solved, and the loading requirement of a customer is met.
Description
Technical Field
The invention belongs to the technical field of vehicle manufacturing, and particularly relates to a solution for a side wall threshold vertical flanging surface edge warping of a commercial vehicle.
Background
For the covering part with a longer side wall threshold flanging surface of the commercial vehicle, the lower edge of the flanging surface often has a warping phenomenon after the straight flanging process is finished. The reason that the flanging surface warps is that the flanging surface cannot be molded in place at one time in the part molding process, and the flanging surface needs to be preformed and bent through a deep drawing process and then is flanged in a shaping process. However, in the process, because the side wall part is large, in order to ensure the quality of the surface A or the requirements of a host factory, an over-pulling step is additionally arranged outside the surface A, the over-pulling step is just positioned in the flanging surface of the product, and after deep-drawing forming, the over-pulling step is thinned, so that hardening is generated, and the lower edge of the product is warped. When the vertical flanging of the shaping process is achieved, as the edge of the plate material feeding part is already edge-warped and hardened, and a gap with the thickness of the plate material exists between the flanging insert and the deep drawing lower die, the flanging insert cannot straighten the edge of the warped product, so that the hardened arc shape after flanging is still reserved, the edge-warped of the lower edge of the product in the flanging surface area of the threshold is caused, the product quality is seriously influenced, even the loading problem is caused, and the part is scrapped.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a solution for raising edges of a side wall threshold vertical flanging surface of a commercial vehicle, when the side wall threshold vertical flanging surface enters a flanging process after deep drawing and forming, a flanging insert moves downwards to be in contact with a template, the edge of the warped template can form rotary motion by means of the highest point of a protruding part, the raised edges which are hardened rotate around the highest point of the protruding part, a similar shaping process is formed on the edge of the template, and the edges are bent in the opposite direction of the raised edges, so that the shape of the warped raised edges is restrained to be a straight edge, the problem of warping of the edge of the template is solved, and the loading requirements of customers are met.
The technical scheme adopted by the invention is as follows:
a solution method for raising edges of a side wall threshold vertical flanging surface of a commercial vehicle comprises the following steps: the lower drawing die is provided with a protruding part which corresponds to the over-drawing step of the upper drawing die; after the template is subjected to drawing operation, the flanging insert is matched with a drawing lower die to extrude the template, so that the tilted edges of the template are inwards bent around the convex parts and restrained into straight edges.
Preferably, the surface of the protrusion contacting the template is a smooth curved surface.
Preferably, the line length from the A-face edge of the lower drawing die to the protruding part end point is longer than the line length from the A-face edge of the upper drawing die to the over-drawing step end point, and the line length from the A-face edge of the lower drawing die to the protruding part start point is equal to the line length from the A-face edge of the upper drawing die to the over-drawing step start point.
Preferably, the line length from the A-plane edge of the lower drawing die to the end point of the projection is more than 5mm longer than the line length from the A-plane edge of the upper drawing die to the end point of the over-drawing step.
Preferably, the starting point and the ending point of the protrusion are extended outwardly by 0.25mm, respectively.
Preferably, when the thickness of the template is less than 1mm, the vertical height of the highest point of the protruding part is 0.25 mm-0.3 mm.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
when the flanging process is carried out after deep drawing, the flanging insert moves downwards to be in contact with the template, the warped template edge can form rotary motion by means of the highest point of the protruding part, so that the hardened warped edge rotates around the highest point of the protruding part, a similar shaping process is formed on the template edge, the bent edge is bent in the opposite direction of the warped edge, the warped edge shape is restrained to be a straight edge, the problem of template edge warping is solved, and the loading requirement of a customer is met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic drawing operation diagram according to an embodiment of the present invention;
FIG. 2 is a schematic view of a projection design according to an embodiment of the present invention;
fig. 3 is a schematic diagram of flanging operation according to an embodiment of the present invention.
Description of the drawings: 1-deep drawing a lower die; 2-shaping plate; 3-deep drawing the upper die; 4-a protrusion; and 5-flanging inserts.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which a product of the application is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
The present invention will be described in detail with reference to fig. 1 to 3.
Examples
A solution method for raising edges of a side wall threshold vertical flanging surface of a commercial vehicle comprises the following steps: a bulge 4 is arranged on the drawing lower die 1, and the bulge 4 corresponds to an over-drawing step of the drawing upper die 3; as shown in fig. 1, the drawing operation is performed on the pattern plate 2, and the drawing upper die 3 and the drawing lower die 1 without the protruding portion 4 are matched to press-draw the pattern plate 2, so that the pattern plate 2 is edge-warped. After the bulge 4 is arranged, as shown in fig. 3, when the template 2 is in flanging operation, the flanging insert 5 is matched with the deep drawing lower die 1 to squeeze the template 2, so that the raised edge of the template 2 is inwards bent around the bulge 4 and restrained into a straight edge.
In order to ensure that the inward bending position of the template 2 keeps a smooth surface, the surface of the convex part 4, which is in contact with the template 2, is set to be a smooth curved surface, so that the surface of the template 2 is prevented from being damaged.
The line length from the A-plane edge of the deep-drawing lower die 1 to the end point of the protruding part 4 is longer than the line length from the A-plane edge of the deep-drawing upper die 3 to the end point of the over-drawing step, and the line length from the A-plane edge of the deep-drawing lower die 1 to the start point of the protruding part 4 is equal to the line length from the A-plane edge of the deep-drawing upper die 3 to the start point of the over-drawing step. Wherein the A surface refers to a curved surface with very high quality.
As shown in fig. 2, the over-pulling step is a semicircular arc surface, the point E is a circular arc quadrant point (i.e. the lowest point) of the semicircular arc surface, the point B is the highest point of the protruding portion 4, and the point E corresponds to the point B. Since the line length from the a-plane edge of the upper die 3 to the start point (point D) of the over-drawing step is g, the line length from the a-plane edge of the lower die 1 to the start point (point a) of the protrusion 4 is g, and the line length L from the a-plane edge of the upper die 3 to the end point (point F) of the over-drawing step 1 ＝g+L DEF The line length from the surface a edge of the lower die 1 to the end point (point C) of the projection 4 is: l (L) 2 ＝g+L ABC . Because L is 2 ＝g+L ABC ＞L 1 ＝g+L DEF Therefore L ABC Greater than L DEF . Considering the influence of the clearance between the male die and the female die on the part forming, L is arranged ABC Greater than L DEF 。
The line length from the a-plane edge of the drawing lower die 1 to the end point (point C) of the projection 4 is 5mm longer than the line length from the a-plane edge of the drawing upper die 3 to the end point (point F) of the over-drawing step. Specifically, L 2 ＝L 1 +5mm。
To ensure symmetry and smoothness of the protrusion 4, the start and end points of the protrusion 4 are extended outwardly by 0.25mm, respectively, for increasing the length by 5mm.
When the thickness of the template 2 is less than 1mm, the vertical height of the highest point of the protruding part 4 (i.e., the length of GB) is 0.25 mm-0.3 mm.
In designing the projection 4, g and L are measured first DEF The position of the point A is determined on the drawing lower die 1 according to the value of g, and the positions of the point A are determined according to the values of g and L DEF The point C is determined by adding 5mm to the numerical value of the point B, the point B is positioned on the middle vertical line of the AC line segment, the position of the point B is determined by using the numerical value of GB, and then a smooth curve is formed by using the positions of the three points ABC.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a solution method of side wall threshold vertical flanging face perk limit of commercial car which characterized in that includes: a convex part (4) is arranged on the deep drawing lower die (1), and the convex part (4) corresponds to an over-drawing step of the deep drawing upper die (3); after the template (2) is subjected to drawing operation, the flanging insert (5) is matched with the drawing lower die (1) to squeeze the template (2), so that the raised edge of the template (2) is inwards bent around the protruding part (4) and restrained into a straight edge.
2. The solution for raising the side wall threshold vertical flanging surface of a commercial vehicle according to claim 1, wherein the surface of the protruding part (4) contacted with the template (2) is a smooth curved surface.
3. The solution of the vertical flanging face edge-lifting of the side wall threshold of the commercial vehicle according to claim 1 is characterized in that the line length from the A face edge of the lower drawing die (1) to the end point of the protruding part (4) is longer than the line length from the A face edge of the upper drawing die (3) to the end point of the over-drawing step, and the line length from the A face edge of the lower drawing die (1) to the starting point of the protruding part (4) is equal to the line length from the A face edge of the upper drawing die (3) to the starting point of the over-drawing step.
4. A solution for raising a side sill vertical flanging surface for a commercial vehicle according to claim 3, characterized in that the line length from the a-plane edge of the lower drawing die (1) to the end point of the protruding portion (4) is more than 5mm from the a-plane edge of the upper drawing die (3) to the end point of the over-drawing step.
5. The solution for the raised edge of the vertical flanging surface of the side wall threshold of the commercial vehicle according to claim 4, wherein the starting point and the ending point of the protruding part (4) are respectively extended outwards by 0.25mm.
6. The solution for raising edges of a vertical flanging surface of a side wall threshold of a commercial vehicle according to claim 1, wherein when the thickness of the template (2) is smaller than 1mm, the vertical height of the highest point of the protruding part (4) is 0.25 mm-0.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311646710.7A CN117644141A (en) | 2023-12-04 | 2023-12-04 | Solution method for raising edges of vertical flanging surface of side wall threshold of commercial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311646710.7A CN117644141A (en) | 2023-12-04 | 2023-12-04 | Solution method for raising edges of vertical flanging surface of side wall threshold of commercial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117644141A true CN117644141A (en) | 2024-03-05 |
Family
ID=90042921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311646710.7A Pending CN117644141A (en) | 2023-12-04 | 2023-12-04 | Solution method for raising edges of vertical flanging surface of side wall threshold of commercial vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117644141A (en) |
-
2023
- 2023-12-04 CN CN202311646710.7A patent/CN117644141A/en active Pending
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