Punching technique for hypogynous metal bumper of heavy-duty car

Abstract

The invention provides a punching technique for a lower metal bumper of a heavy-duty truck, comprising: (1) blanking: adding technique supplement when blanking, designing and producing a set of moulds according to blanking size and technique supplement to perform blanking, using wave cutting edge in the blanking mould; (2) modeling: locating according to technique holes added at the two sides of the blanking, modeling by using the mould; (3) trimming, punching front surface holes and side surface holes: designing and producing a set of complex moulds which can completes trimming the molded two ends, punching the front surface holes and side surface holes at the same time. Since the invented technique uses blanking-molding technique instead of the drafting technique, the material is saved, trimming, punching front surface holes and side surface holes are combined in one procedure, the amount of mould set is reduced, the mould cost is reduced, the mould debugging period is shortened, error generated by multitime positioning is avoided, and product precision and pass percent are improved.

Description

technical field [0001] The invention relates to a stamping process for a lower metal bumper of a heavy-duty vehicle, and belongs to the technical field of stamping of auto parts. Background technique [0002] The lower metal bumper of heavy-duty vehicles used in engineering vehicles is generally designed as an integral type. The main requirement is impact resistance, and the appearance quality is not high. Its structure is shown in Figure 1, with holes on the front and side. Therefore, the thickness of the steel plate material of the lower metal bumper is relatively large, generally between 2.5mm and 3.0mm, and its shape is relatively complex, with a specific product shape. Due to the thick steel plate material and difficult forming, the existing stamping process is relatively cumbersome and requires 6 processes: 1. Deep drawing: position and draw the shape of the part with two adjacent sides; 2. Trimming: Trim the periphery; 3. Shaping; 4. Partial trimming and punching fro...

AI Technical Summary

Problems solved by technology

Due to the large thickness of the steel plate material and the difficulty in forming, the existing stamping process is relatively cumbersome and requires 6 processes: 1. Deep drawing: position and draw the shape of the part with two adjacent sides; 2. Trimming: Trim the periphery; 3. Shaping; 4. Partial trimming and punching the front hole; 5. punching the side hole; 6. Trimming the sides

The stamping process uses a total of 6 sets of molds, and the process is not reasonable, resulting in high production costs, low efficiency, low product qualification rate, and high mold maintenance costs

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