CN-116237720-B - Processing method of automobile top cover

Abstract

The invention relates to a processing method of an automobile top cover, which comprises the following steps of S1 drawing, namely manufacturing a raw material plate into a semi-finished automobile top cover through a drawing die, S2 trimming and punching, wherein part of plate allowance is reserved at the outer sides of two ends of the tail part of the semi-finished automobile top cover during trimming, and punching is performed at a preset position of the plate allowance, S3 shaping is performed on the semi-finished automobile top cover with the plate allowance through a shaping die, S4 side trimming is performed on the semi-finished automobile top cover according to a set part contour, and the manufacturing of the finished automobile top cover is completed.

Inventors

• CHENG XIN
• CHEN YUAN
• TONG QIANHU
• ZHU PING

Assignees

• 岚图汽车科技有限公司

Dates

Publication Date

20260508

Application Date

20230314

Claims (5)

1. 1. A processing method of an automobile top cover comprises the following steps: S1, drawing, namely manufacturing a raw material plate into a semi-finished automobile top cover through a drawing die; S2, trimming and punching, wherein partial plate allowance is reserved at the outer sides of two ends of the tail part of the semi-finished automobile roof during trimming, and punching is performed at a preset position of the plate allowance; S3, shaping, namely shaping the semi-finished automobile top cover with the plate allowance through a shaping die, wherein the part, close to the automobile top cover, of the punching area of the plate allowance is subjected to arc treatment, and the radius of the arc is not less than 5mm; s4, trimming the side of the semi-finished automobile top cover according to the set part outline, and finishing the manufacturing of the finished automobile top cover; the sheet material allowance at two ends of the semi-finished automobile top cover is connected through waste materials, the part of the sizing die corresponding to the sheet material allowance is provided with a supplementary sizing area, the connecting part of the waste materials and the sheet material allowance is provided with a supplementary material pressing area, and the waste materials and the sheet material allowance are trimmed and turned in the step S4.
2. 2. The method for processing the automobile roof according to claim 1, wherein the overlapping portion of the special-shaped hole and the contour of the automobile roof is determined by CAE fitting.
3. 3. The method of claim 1, wherein the scrap material is trimmed adjacent to the punching location and is subjected to a knife-passing process.
4. 4. The method of claim 1, wherein the outer side of the sheet stock allowance is subjected to a knife-connecting process with the connecting portion of the automobile roof.
5. 5. The method of claim 1, wherein the material of the drawing die and the sizing die is die steel.

Description

Processing method of automobile top cover Technical Field The invention relates to the technical field of automobile part processing and production processes, in particular to a processing method of an automobile top cover. Background The appearance quality of automobiles is more and more paid attention to, and although the spraying paint can improve a part of visual perception, most of the appearance quality still needs to strictly control the appearance and the size quality of parts and components. In particular, the shaping characteristics of the process of stamping the parts themselves, which results in some defects being difficult to eliminate, some defects being amplified even after painting, the defects being more pronounced, these poor appearances even causing customer doubts about the quality of the automobile. The outer plate product of the top cover of the automobile covering part has smaller curvature and flatter shape, but the tail part of the top cover is often designed into a negative angle for being more matched with the assembly of the back door of the automobile, and the forming process planning can only be realized by using a side shaping procedure. In the prior art, the tail of the top cover after side shaping has wrinkling defects, which still exist when the simulation forming analysis is performed by AUTOFROM software, and the wrinkling is reduced but still exists through the optimization of a die structure and the effort of field debugging personnel, and cannot be completely eliminated. In order to improve the wrinkling problem, in the process of side shaping, the two sides of the top cover of the automobile are provided with pressing surfaces so that the plate is shaped in a clamping state, thus the wrinkling of the side wall of the tail part is improved to a certain extent, but the problem of the quality of the wrinkled surface also exists at the two ends of the tail part of the top cover. Disclosure of Invention Based on the expression, the invention provides a processing method of an automobile top cover, which aims to solve the technical problem that the two ends of the tail part of the automobile top cover have wrinkling defects in the prior art. The technical scheme for solving the technical problems is as follows: a processing method of an automobile top cover comprises the following steps: S1, drawing, namely manufacturing a raw material plate into a semi-finished automobile top cover through a drawing die; S2, trimming and punching, wherein part of plate allowance is reserved at the outer sides of two ends of the tail part of the semi-finished automobile top cover during trimming, and punching is performed at a preset position of the plate allowance; S3, shaping, namely shaping the semi-finished automobile top cover with the allowance of the plate material through a shaping die; S4, trimming the side of the semi-finished automobile top cover according to the set part outline, and finishing the manufacturing of the finished automobile top cover. Compared with the prior art, the technical scheme of the application has the following beneficial technical effects: The processing method provided by the application reserves part of the plate allowance during trimming, punches holes on the plate allowance, shapes the semi-finished automobile top cover with the plate allowance, and finally trims to finish the finished product manufacture. On the basis of the technical scheme, the invention can be improved as follows. Further, in the step S2, a special-shaped hole is punched, and the boundary of the part, close to the inner side, of the special-shaped hole coincides with the outline of the part of the finished automobile top cover. Further, the overlapping part of the special-shaped hole and the outline of the automobile top cover is determined through CAE fitting. Furthermore, the residual plates at the two ends of the semi-finished automobile top cover are connected through waste materials, and the waste materials and the residual plates are trimmed and turned in the step S4. Further, the part of the sizing die corresponding to the plate allowance is provided with a supplementary sizing area, and the connecting part of the waste material and the plate allowance is provided with a supplementary material pressing area. Further, the scrap is processed by a cross knife when being trimmed near the punching position. Further, the part, close to the automobile top cover, of the punching area of the plate allowance is subjected to arc treatment, and the radius of the arc is not smaller than 5mm. Furthermore, the outer side of the allowance of the plate material and the connecting part of the automobile top cover are subjected to a handover knife treatment. Further, the punching position is positioned in the middle of the allowance of the plate. Further, the materials of the drawing die and the sizing die are die steel. Drawings Fig. 1 is a schematic step diagram of a method for processing a