Material returning structure used for progressive die U-shaped sheet metal part, material returning method and application

Abstract

The invention discloses a material returning structure used for a progressive die U-shaped sheet metal part, a material returning method and an application, and belongs to the technical field of die design. The material returning structure comprises a lower die seat, a driving core is arranged on the upper end surface of the lower die seat, and the left side and the right side of the driving coreare each provided with a side sliding block; each side sliding block comprises an inclined part and a horizontal part; the longitudinal section of the driving core is in a trapezoid shape; the two inclined parts are in sliding contact with the outer side of the driving core; a concave die base plate and a material supporting block are arranged between each horizontal part and the lower die seat; each concave die base plate is arranged between the lower die seat and the corresponding material supporting block, and a material floating spring is arranged between the lower die seat and the corresponding concave die base plate; each material supporting block is a block body with a groove on the upper surface, and backsprings are arranged an the positions, in contact with the corresponding horizontal part, of the two sides of the groove; each horizontal part can horizontally slide along the bottom of the corresponding groove; and the lower die seat, the concave die base plates and the material supporting blocks are each provided with a spacer sleeve for limiting the upward moving travel of the corresponding material supporting block in the vertical direction. According to the material returning structure, the material returning method and the application, the efficiency is high, the cost is low, the material returning is convenient, the market needs can be met, and the popularizationis facilitated.

Description

technical field [0001] The invention belongs to the technical field of mold design, and in particular relates to a material return structure, a material return method and an application of a U-shaped sheet metal part used in a progressive die. Background technique [0002] U-shaped sheet metal parts are very common in sheet metal products. At present, common U-shaped sheet metal parts are manufactured by single-process molds. The forming process includes trimming, forming and bending, so three sets of single-process molds are required to complete The above steps have high production cost and low efficiency; therefore, it is necessary to make a progressive mold to solve the above problems. [0003] However, the progressive die involves the return of the product during the process flow. Since the U-shaped sheet metal parts are often tightly wrapped around the forming mold after forming, the return of the material is inconvenient; especially for the side bracket of the car body...

AI Technical Summary

Problems solved by technology

[0002] U-shaped sheet metal parts are very common in sheet metal products. At present, common U-shaped sheet metal parts are manufactured by single-process molds. The forming process includes trimming, forming and bending, so three sets of single-process molds are required to complete The above steps have high production cost and low efficiency; therefore, it is necessary to make a progressive mold to solve the above problems

[0003] However, the progressive die involves the return of the product in the process flow. Since the U-shaped sheet metal parts are often tightly wrapped around the forming mold after forming, the return of the material is inconvenient; especially for the side bracket of the car body, which has a narrow lower part and a wider upper part. The special-shaped U-shaped sheet metal parts with a small overall product size are more inconvenient to return, which seriously affects the progress of the next process and cannot meet the normal supply of products

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