Production process of 90-degree soft copper bar free of NC machining

Abstract

The invention provides a production process of a 90-degree soft copper bar free of NC machining. The production process comprises the following steps that a, discharging is conducted, copper foils arestacked in order, and thus a first semi-finished product is obtained; 2, one end of the first semi-finished product is aligned and then subjected to diffusion welding, and a second semi-finished product is obtained; 3, the middle of the second semi-finished product is bent by 90 degrees, and a third semi-finished product is obtained; 4, the other end of the third semi-finished product is alignedand then subjected to diffusion welding, and a fourth semi-finished product is obtained; 5, one end of the fourth semi-finished product is punched into a round connector with a square hole, the otherend of the fourth semi-finished product is punched into a round connector with a round hole, and a fifth semi-finished product is obtained; and 6, the middle of the semi-finished product is sleeved with a heat shrink tube to obtain a finished product. Compared with a traditional process that edging clamping and NC machining after diffusion welding are needed in the 90-degree bending process, copper foil stacks can be discharged through a punching die in an equal-length mode, two-step diffusion welding and two-step punching are conducted, operation is easy, efficiency is high, the yield is increased, copper foil loss is small, and cost is relatively reduced.

Description

technical field [0001] The invention belongs to the technical field of soft copper bar production, and in particular relates to a production process of a 90° soft copper bar without NC processing. Background technique [0002] There is a 90°bent flexible copper bar for new energy vehicles, with a thickness of about 5mm, such as figure 1 shown. In the production and processing of the soft copper bar using the traditional process, since the soft copper bar has to be bent into 90°, the inner and outer R angles will be different, which will cause the length of the inner and outer copper foil to gradually change; the traditional manufacturing process generally adopts Gradient cutting copper foil stacking needs to be bent at 90° while ensuring that the two ends are just aligned. After the two ends are aligned, diffusion welding is performed, and then the periphery is processed into an L shape by NC milling, and then the hole is milled by NC, and finally put on the heat shrinkable...

AI Technical Summary

Problems solved by technology

[0003] However, using the traditional process to produce the soft copper bar requires a very expensive tapered length cutting machine, and it is also difficult to bend and clamp the edges, resulting in low efficiency and low yield; moreover, the loss of copper foil is large and the utilization rate is low. High cost; the traditional process is relatively complicated, and the output is relatively small

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