CN117358779A - Forming process for manufacturing circular tubular automobile parts - Google Patents
Forming process for manufacturing circular tubular automobile parts Download PDFInfo
- Publication number
- CN117358779A CN117358779A CN202311526553.6A CN202311526553A CN117358779A CN 117358779 A CN117358779 A CN 117358779A CN 202311526553 A CN202311526553 A CN 202311526553A CN 117358779 A CN117358779 A CN 117358779A
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- CN
- China
- Prior art keywords
- manufacturing
- rolling
- forming
- tubular
- molding process
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 92
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 42
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- 238000009966 trimming Methods 0.000 claims abstract description 18
- 238000000465 moulding Methods 0.000 claims abstract description 14
- 238000005452 bending Methods 0.000 claims abstract description 13
- 238000007493 shaping process Methods 0.000 claims description 15
- 238000003698 laser cutting Methods 0.000 claims description 4
- 238000010923 batch production Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/16—Making tubes with varying diameter in longitudinal direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/30—Finishing tubes, e.g. sizing, burnishing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a forming process, in particular a forming process for manufacturing round tubular automobile parts, and belongs to the technical field of automobile part production processes. A molding process for manufacturing a circular tubular automobile part, which can realize the manufacture of the circular tubular part by flat cold stamping and rolling. The forming process is based on continuously blanking a plate material with a basic shape, sequentially arranged drawing forming, inward rolling edge pre-bending, respectively rolling into a large end profile and a small end profile, and finally trimming the edge to obtain the required round tubular automobile part, wherein the basic shape of the round tubular automobile part is required to be formed during drawing forming, and the positioning surface of each subsequent process is pulled out.
Description
Technical Field
The invention relates to a forming process, in particular to a forming process for manufacturing a round tubular automobile part, and belongs to the technical field of automobile part production processes.
Background
The current automobile industry has strong competition, low profit, strict cost control and higher quality and after-sales service requirements. The method is a necessary way for enterprises to face the vigorous competition, the advanced technology is applied, the product quality is improved, and the complex part manufacturing is overcome. The 85% parts of the automobile are manufactured by stamping, and in order to reduce the manufacturing cost, the forming process of some stamping parts with complex structures needs to be changed to reduce the manufacturing cost
The round tubular part is a very common automobile part. Because the part is tubular and the difference of the variable cross-sectional shapes of the two ends exceeds 50%, the part cannot be molded by adopting the traditional internal high-pressure molding process due to the large difference. In order to solve the forming process problem of the parts, a flat cold stamping and rolling forming process is needed to realize the forming of the tubular parts, so that the purposes of improving the stamping forming efficiency and reducing the manufacturing cost are achieved.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: a molding process for manufacturing a circular tubular automobile part, which can realize the manufacture of the circular tubular part by flat cold stamping and rolling.
The technical scheme adopted for solving the technical problems is as follows: a shaping technology for manufacturing circular tubular automobile parts is based on the continuous blanking of basic plate, and includes sequentially drawing, inward rolling, pre-bending, rolling to obtain big and small end surfaces, trimming to obtain needed circular tubular automobile parts,
wherein, during drawing and forming, the basic shape of the round tubular automobile part needs to be formed, and the positioning surface of each subsequent process is pulled out.
Furthermore, before the inner curled edge is pre-bent, the blank subjected to drawing molding needs to be flanging and shaped according to the deformation condition of the blank.
The preferred mode of the scheme is that the flanging shaping is based on deep groove blank in place by drawing, the molded surface which is not molded in the drawing process is flanging shaped into a required molded surface, and the drawing bottom surface is shaped.
Further, after flanging and shaping, accurate trimming is performed on the edges of the two sides after flanging and shaping according to the deformation condition of the blank, redundant epitaxial blanks are removed, and then pre-bending is performed on inwards curled edges.
The preferable mode of the scheme is that when the large end surface and the small end surface are rolled, the method respectively comprises two steps of rolling the basic shape of the large end surface and rolling the small end surface according to the specific shape of the part.
Further, a laser cutting process is adopted when trimming the edge line.
The beneficial effects of the invention are as follows: according to the technical scheme, on the basis of continuously blanking the plate material with the basic shape, the plate material is sequentially arranged, the plate material is formed by drawing, bending inwards, rolling into the large end surface and the small end surface respectively, and finally trimming the edge to obtain the required round tubular automobile part, wherein the basic shape of the round tubular automobile part is required to be formed during drawing, and the positioning surface of each subsequent process is pulled out. Therefore, the technical problems that in the prior art, the part is tubular and the difference of the variable cross-sectional shapes of the two ends exceeds 50 percent, and the forming of the part cannot be realized by adopting the traditional internal high-pressure forming process due to the large difference are solved, and meanwhile, the process flow provided by the application is used for one-time pre-bending from blanking, drawing forming and inward rolling until finally forming the circular tubular automobile part when manufacturing the circular tubular part, so that the purposes of improving the stamping forming efficiency and reducing the manufacturing cost can be achieved.
Drawings
FIG. 1 is a schematic three-dimensional view of a circular tubular automotive part product produced by a molding process for manufacturing a circular tubular automotive part according to the present invention;
FIG. 2 is a schematic diagram showing the state of blank change in the blanking process of the forming process for manufacturing a circular tubular automobile part according to the present invention;
FIG. 3 is a schematic view showing a state of a blank change in a drawing forming process of a forming process for manufacturing a circular tubular automobile part according to the present invention;
FIG. 4 is a schematic view showing a state of a blank change in a burring process of a molding process for manufacturing a circular tubular automobile part according to the present invention;
FIG. 5 is a schematic view showing the state of the blank change in the precise trimming process of the forming process for manufacturing a circular tubular automobile part according to the present invention;
FIG. 6 is a schematic illustration of the change in blank during the inward curled edge pre-bending process of the forming process for manufacturing a tubular automotive part according to the present invention;
FIG. 7 is a schematic view showing the change of blank in the basic shape rolling process of the large and small end profiles of the forming process for manufacturing a circular tubular automobile part according to the present invention;
FIG. 8 is a schematic view showing the state of blank change in the precision rolling process of the small end profile of the forming process for manufacturing a circular tubular automobile part according to the present invention;
fig. 9 is a schematic view showing the structure of a circular tubular automobile part obtained by trimming the edge line used in the molding process for manufacturing the circular tubular automobile part according to the present invention.
Detailed Description
Fig. 1 to 9 show a molding process for manufacturing a circular tubular automobile part, which can be used for manufacturing the circular tubular part by flat cold stamping and rolling. The forming process is based on continuously blanking the plate material with basic shape, drawing forming, inward rolling edge pre-bending, rolling into large and small end profiles respectively, trimming the edges to obtain the required round tubular automobile parts,
wherein, during drawing and forming, the basic shape of the round tubular automobile part needs to be formed, and the positioning surface of each subsequent process is pulled out. According to the technical scheme, on the basis of continuously blanking the plate material with the basic shape, the plate material is sequentially arranged, the plate material is formed by drawing, bending inwards, rolling into the large end surface and the small end surface respectively, and finally trimming the edge to obtain the required round tubular automobile part, wherein the basic shape of the round tubular automobile part is required to be formed during drawing, and the positioning surface of each subsequent process is pulled out. Therefore, the technical problems that in the prior art, the part is tubular and the difference of the variable cross-sectional shapes of the two ends exceeds 50 percent, and the forming of the part cannot be realized by adopting the traditional internal high-pressure forming process due to the large difference are solved, and meanwhile, the process flow provided by the application is used for one-time pre-bending from blanking, drawing forming and inward rolling until finally forming the circular tubular automobile part when manufacturing the circular tubular part, so that the purposes of improving the stamping forming efficiency and reducing the manufacturing cost can be achieved.
Correspondingly, in order to facilitate improvement of forming quality and construction of each subsequent procedure, the flanging shaping of the drawn blank is required according to the deformation condition of the blank before pre-bending the inner coiled edge. And during flanging shaping, the deep groove blank in place is used as the basis, the molded surface which is not molded in the drawing process is flanged into a required molded surface, and the bottom surface of the drawing is shaped. After flanging and shaping, the edges of the two sides after flanging and shaping are precisely trimmed according to the deformation condition of the blank, redundant epitaxial blanks are removed, and then the inward curled edges are pre-bent.
In the specific operation process, when the large end surface and the small end surface are rolled, two steps of rolling the basic shape of the large end surface and rolling the small end surface accurately are included according to the specific shape of the part. When trimming the edge, a laser cutting process is adopted.
In summary, the flat cold stamping coil forming process fully utilizes the characteristic of high stamping forming efficiency, reduces the production cost and improves the production efficiency.
The technical scheme of the application is further described by the following specific examples:
the specific implementation mode from the flat plate to the final forming process is as follows:
1. adopting a continuous blanking process to manufacture the basic shape of the flat material sheet;
2. the method comprises the steps of adopting a drawing process to form the basic shape of a part, and simultaneously taking the positioning surface of a later process into consideration to draw out, wherein the specific process is that a blanking material sheet formed by the blanking process is placed in a drawing die process, the initial position of the material sheet is positioned through profiling positioning, a pressing machine drives a drawing die, and after a material sheet is pressed by a material pressing device in the die, the basic shape of the part is formed by matching a convex die and a concave die;
3. the method comprises the specific processes of placing a part manufactured by the drawing process in a flanging shaping die process, positioning by profiling, driving a die by a press, matching a convex die with a concave die to shape the non-molded surface of the drawing process, flanging and shaping the bottom surface of the drawing process;
4. the method comprises the steps of adopting a 2-order side trimming procedure, accurately trimming the side line of a later procedure to be formed, namely placing a flanging and shaping procedure finished product in a trimming die procedure, driving the 2-order side trimming procedure by a press through profiling positioning, and accurately trimming the side line of the later procedure to be formed;
5. the method comprises the steps of adopting an inward forming process to pre-bend the rolled edges of the parts, namely placing a part manufactured by an edge accurate trimming process in an inward forming mold process, driving a mold by a press through profiling positioning, and pre-bending the rolled edges of the parts by matching a convex mold with a concave mold;
6. the method comprises the steps of adopting a rolling procedure to complete rolling of the large end surface and the small end surface of the part, wherein a piece manufactured in the rolling pre-bending procedure is placed in the rolling procedure and positioned through a positioning hole, a press machine drives a die, and a convex-concave die and a core rod are matched to complete rolling of the large end surface and the small end surface of the part;
7. the rolling process is adopted to finish rolling the small end profile of the part, the specific process is that the part manufactured in the rolling process is placed in the rolling process, the part is positioned through a positioning hole, a press machine drives a die, and a convex-concave die and a core rod are matched to finish rolling the small end profile of the part;
8. and adopting a laser cutting procedure to cut the edge line of the coiled part by laser, so as to finish the whole part production.
In summary, the flat cold stamping coil forming process realizes the forming of the product parts, and meanwhile, the process adopts the stamping die for forming, so that the stamping part has high single working procedure efficiency although the working procedures are more, the manufacturing cost is correspondingly controlled, and the stable batch production of the product is realized.
Example 1
1. It is proposed that the idea is that,
2. the three-dimensional design is carried out,
3. the manufacturing of the mould is carried out,
4. the test mould is used for verification,
5. the verification of the small-batch production,
6. put into use.
Claims (6)
1. The molding process for manufacturing the round tubular automobile part is characterized in that: the forming process is based on continuously blanking the plate material with basic shape, drawing forming, inward rolling edge pre-bending, rolling into large and small end profiles respectively, trimming the edges to obtain the required round tubular automobile parts,
wherein, during drawing and forming, the basic shape of the round tubular automobile part needs to be formed, and the positioning surface of each subsequent process is pulled out.
2. The molding process for manufacturing a circular tubular automotive part according to claim 1, characterized in that: before the inner coiled edge is pre-bent, flanging and shaping are also needed to be carried out on the drawn blank according to the deformation condition of the blank.
3. A molding process for manufacturing a tubular automotive part according to claim 2, characterized in that: the flanging shaping is based on deep groove blank in place by drawing, the molded surface which is not formed in the drawing process is flanged into a required molded surface, and the drawing bottom surface is shaped.
4. A molding process for manufacturing a tubular automotive part according to claim 1, 2 or 3, characterized in that: after flanging and shaping, the edges of the two sides after flanging and shaping are precisely trimmed according to the deformation condition of the blank, redundant epitaxial blanks are removed, and then the inward curled edges are pre-bent.
5. The molding process for manufacturing a tubular automotive part according to claim 4, characterized in that: when the large end surface and the small end surface are rolled, the rolling process respectively comprises two steps of rolling the basic shape of the large end surface and rolling the small end surface according to the specific shape of the part.
6. The molding process for manufacturing a circular tubular automobile part according to claim 5, wherein: when trimming the edge, a laser cutting process is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311526553.6A CN117358779A (en) | 2023-11-15 | 2023-11-15 | Forming process for manufacturing circular tubular automobile parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311526553.6A CN117358779A (en) | 2023-11-15 | 2023-11-15 | Forming process for manufacturing circular tubular automobile parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117358779A true CN117358779A (en) | 2024-01-09 |
Family
ID=89391122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311526553.6A Pending CN117358779A (en) | 2023-11-15 | 2023-11-15 | Forming process for manufacturing circular tubular automobile parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117358779A (en) |
-
2023
- 2023-11-15 CN CN202311526553.6A patent/CN117358779A/en active Pending
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