CN114273580A - Method applied to upsetting and forming of cup-shaped part - Google Patents
Method applied to upsetting and forming of cup-shaped part Download PDFInfo
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- CN114273580A CN114273580A CN202111677391.7A CN202111677391A CN114273580A CN 114273580 A CN114273580 A CN 114273580A CN 202111677391 A CN202111677391 A CN 202111677391A CN 114273580 A CN114273580 A CN 114273580A
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Abstract
The invention discloses a method for upsetting and forming a cup-shaped part, which comprises five steps of blanking, imprinting, plate forming, trimming and shaping, side wall upsetting and the like, wherein an easily realized imprinting and forming process is adopted to introduce a non-uniform customized plate so as to change the traditional deep drawing and upsetting forming process chain, in addition, because the non-uniform customized plate is locally thickened, a small drawing corner convex die is adopted to replace a large circular corner convex die in the traditional plate forming, the drawing process is simplified into one step, meanwhile, the circular corner shaping process can be saved, and the deep drawing and forming limit and the forming efficiency are improved.
Description
Technical Field
The invention relates to the technical field of sheet stamping processes, in particular to a method applied to upsetting and forming a cup-shaped part.
Background
The sheet stamping process is mainly used for deforming under the tensile stress, the external shape of a part can be accurately formed, the wall thickness distribution of the part cannot be controlled, and the integral strength of the part is easily reduced due to the fact that the wall thickness of a fillet of a stamping part is reduced. Some structural parts, such as automobile transmission devices and hub parts, generally have higher strength requirements at the fillet, and if the strength of the fillet area of a workpiece is improved by increasing the thickness of an original plate, the material utilization rate is inevitably reduced, the total mass of the part is increased, and the development trend of green manufacturing, energy conservation and emission reduction is not met. In addition, excessive wall thickness reduction can even break the sheet material, which limits the forming limits of press forming processes such as drawing, bending, and the like. Therefore, the volume forming process of the deep drawing-side wall upsetting plate becomes a manufacturing method of a complex shell part so as to control the wall thickness distribution and realize the manufacturing of a lightweight structure. However, drawing results in a cup preform, and thinning at the corners can cause folding defects during subsequent upsetting, as illustrated in FIG. 2, thereby affecting part performance.
When the traditional plate drawing cup-shaped piece is adopted, although multi-step bottom fillet shaping is carried out, one external fillet still exists, and due to the action of tensile stress, the bottom fillet is seriously thinned. How to solve the problem of fillet upsetting folding becomes the core problem of influencing the upsetting forming quality of the side wall of the cup-shaped part.
Disclosure of Invention
Technical problem to be solved
In order to overcome the defects of the prior art, a method applied to upsetting and forming a cup-shaped part is provided, and a non-uniform customized plate is introduced into an easily-realized stamping and forming process so as to change the traditional deep drawing and upsetting forming process chain. In addition, due to the fact that the non-uniform customized plate is locally thickened, the small-fillet convex die is adopted to replace a large-fillet convex die in the traditional plate drawing forming process, the drawing process is simplified into one step, meanwhile, the fillet shaping process can be omitted, and the drawing forming limit and the forming efficiency are improved.
(II) technical scheme
The invention is realized by the following technical scheme: the invention provides a method for upsetting and forming a cup-shaped part, which comprises the following steps of:
1) step 1: blanking, namely obtaining a circular blank with the outline size of the cup-shaped part by stamping and cutting;
2) step 2: impressing, namely impressing a circular pointed convex edge with the diameter consistent with that of the bottom of the needed cup-shaped part at the bottom of the circular blank in the step 1 through an extruding machine, so as to obtain a locally thickened non-uniform customized board;
3) and step 3: forming a plate material, namely drawing and forming the non-uniform customized plate in the step 2, and drawing a cup-shaped blank by taking the opposite surface of the circular pointed convex edge as a drawing bottom surface and the center of the circular pointed convex edge as a drawing corner;
4) and 4, step 4: trimming and shaping, namely performing round shaping, wall thickness shaping and cup height trimming and shaping on the outline wall of the cup-shaped blank obtained in the step 3 so as to obtain a refined blank with the standard roundness, the consistent thickness of the cup wall and the preset cup height;
and 5: and (4) performing side wall upsetting forming, namely performing side wall upsetting on the fine blank material obtained in the step (4) to obtain a finished cup-shaped part product with a preset thickness and a preset height.
Further, the longitudinal section of the circular pointed convex edge in the step 2 is an isosceles right triangle.
(III) advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method applied to upsetting and forming a cup-shaped piece, and provides a process path for upsetting and forming a non-uniform-thickness customized plate combined with a controllable deformation area aiming at the influence of preforming on upsetting and forming of a side wall, wherein the process path comprises the working procedures of stamping, deep drawing, shaping, trimming, upsetting and the like. Taking a cup-shaped part with a thickened side wall as an example, in order to prevent the defect of fillet upsetting folding caused by the clearance of a workpiece die, a non-uniform-thickness customized plate is designed. The lubrication conditions are optimized, the radial flow and the normal flow in the stamping forming process can be balanced, and the pre-gathering of materials at the fillet is realized, so that the cup-shaped piece blank with full fillet filling is obtained. The blank is used as a blank for upsetting forming of a controllable deformation area, and a gap between a workpiece and a die is eliminated, so that the common fillet folding defect in side wall upsetting is overcome, and the high-efficiency integrated forming of a complex structural member with unequal wall thickness or integrated functional characteristics is realized.
Drawings
FIG. 1 is a schematic view of a non-uniform customized board and a partially enlarged view of rounded pointed ridges.
FIG. 2 is a schematic view of upset induced bending.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A method for use in upsetting cup-shaped articles, comprising the steps of:
5) step 1: blanking, namely obtaining a circular blank with the outline size of the cup-shaped part by stamping and cutting;
6) step 2: imprinting, namely imprinting a round pointed convex edge with the diameter consistent with that of the bottom of the needed cup-shaped part at the bottom of the round blank in the step 1 by an extruding machine so as to obtain a locally thickened non-uniform customized board, wherein the diameter of the round pointed convex edge is as shown in the figure 1;
7) and step 3: forming a plate material, namely drawing and forming the non-uniform customized plate in the step 2, and drawing a cup-shaped blank by taking the opposite surface of the circular pointed convex edge as a drawing bottom surface and the center of the circular pointed convex edge as a drawing corner;
8) and 4, step 4: trimming and shaping, namely performing round shaping, wall thickness shaping and cup height trimming and shaping on the outline wall of the cup-shaped blank obtained in the step 3 so as to obtain a refined blank with the standard roundness, the consistent thickness of the cup wall and the preset cup height;
and 5: and (4) performing side wall upsetting forming, namely performing side wall upsetting on the fine blank material obtained in the step (4) to obtain a finished cup-shaped part product with a preset thickness and a preset height.
Wherein, the longitudinal section of the round sharp convex edge in the step 2 is an isosceles right triangle.
The invention provides a method for upsetting and forming a cup-shaped part, which is characterized in that a circular pointed convex edge is formed at the bottom of a circular blank plate by an embossing process, and after deep drawing forming, a corner at the bottom of the cup-shaped part is right-angled to eliminate an arc, so that the defect of bending shown in figure 2 caused by upsetting forming can be avoided.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (2)
1. A method for upsetting and forming a cup-shaped member is characterized by comprising the following steps: the method comprises the following steps:
1) step 1: blanking, namely obtaining a circular blank with the outline size of the cup-shaped part by stamping and cutting;
2) step 2: impressing, namely impressing a circular pointed convex edge with the diameter consistent with that of the bottom of the needed cup-shaped part at the bottom of the circular blank in the step 1 through an extruding machine, so as to obtain a locally thickened non-uniform customized board;
3) and step 3: forming a plate material, namely drawing and forming the non-uniform customized plate in the step 2, and drawing a cup-shaped blank by taking the opposite surface of the circular pointed convex edge as a drawing bottom surface and the center of the circular pointed convex edge as a drawing corner;
4) and 4, step 4: trimming and shaping, namely performing round shaping, wall thickness shaping and cup height trimming and shaping on the outline wall of the cup-shaped blank obtained in the step 3 so as to obtain a refined blank with the standard roundness, the consistent thickness of the cup wall and the preset cup height;
5) and 5: and (4) performing side wall upsetting forming, namely performing side wall upsetting on the fine blank material obtained in the step (4) to obtain a finished cup-shaped part product with a preset thickness and a preset height.
2. The method of claim 1 applied to upsetting forming of a cup shaped member, wherein: and in the step 2, the longitudinal section of the circular pointed convex edge is an isosceles right triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111677391.7A CN114273580A (en) | 2021-12-31 | 2021-12-31 | Method applied to upsetting and forming of cup-shaped part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111677391.7A CN114273580A (en) | 2021-12-31 | 2021-12-31 | Method applied to upsetting and forming of cup-shaped part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114273580A true CN114273580A (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111677391.7A Pending CN114273580A (en) | 2021-12-31 | 2021-12-31 | Method applied to upsetting and forming of cup-shaped part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114273580A (en) |
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2021
- 2021-12-31 CN CN202111677391.7A patent/CN114273580A/en active Pending
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