Manufacturing method for blank of length-unequal arc sheet metal part

Abstract

The invention discloses a manufacturing method for a blank of a length-unequal arc sheet metal part. The manufacturing method comprises the steps that the length-unequal arc sheet metal part is subjected to sheet metal spreading treatment by analytical software to obtain an approximate eccentric unequal side arc sheet whose arc sides R are equal; and a coil material is adopted as a raw material and manufacturing is performed on a blanking mould by adopting a mandarin duck type two-step dislocation blanking method. With the adoption of the manufacturing method of the blank of the length-unequal arc sheet metal part, an unequal side arc blank capable of being used for manufacturing the length-unequal arc sheet metal part can be manufactured on the basis of the existing blanking mould processing equipment; the processing allowance is small; the difficulty in subsequent processing can be reduced; the production efficiency can be improved; the material can be saved; the cost can be lowered; and the improvement on competitiveness of an enterprise is facilitated.

Description

technical field [0001] The invention relates to a method for manufacturing a blank of a sheet metal part, in particular to a method for manufacturing a blank of an arc-shaped sheet metal part with unequal lengths that can improve material utilization. Background technique [0002] Arc sheet metal parts with unequal lengths are commonly found in car body sheet metal parts, such as the inner skin on the roof of a car side wall. After the analysis software is used to expand the sheet metal, an approximately equal arc edge R but eccentricity is usually obtained. Equilateral arc-shaped blanks, in the prior art, in order to save materials, the blanks are usually made into arcs instead of rectangles, but since there is only one cutting edge of the continuous blanking die, when the coil is used as the raw material Continuous blanking can only process equilateral arc-shaped blanks, so equilateral arc-shaped blanks are widely used. The defect is that there is a large machining allowan...

AI Technical Summary

Problems solved by technology

[0002] Arc sheet metal parts with unequal lengths are commonly found in car body sheet metal parts, such as the inner skin on the roof of a car side wall. After the analysis software is used to expand the sheet metal, an approximately equal arc edge R but eccentricity is usually obtained. Equilateral arc-shaped blanks, in the prior art, in order to save materials, the blanks are usually made into arcs instead of rectangles, but since there is only one cutting edge of the continuous blanking die, when the coil is used as the raw material Continuous blanking can only process equilateral arc-shaped blanks, so equilateral arc-shaped blanks are widely used. The defect is that there is a large machining allowance at least one end of the part after processing, and subsequent processing is difficult and inefficient. Low material utilization rate and high production cost are not conducive to improving the competitiveness of enterprises

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