Processing characteristics of copper strip?

Copper strip is a kind of relatively pure copper, which can be considered as pure copper in general. Its electrical conductivity and plasticity are relatively good. This metal material has excellent thermal conductivity, ductility and corrosion resistance. The electrical conductivity and thermal conductivity of copper are seriously affected, among which titanium, phosphorus, iron, silicon, etc. significantly reduce the electrical conductivity, while cadmium, zinc, etc. have little effect, and the solid solubility of sulfur, selenium, tellurium, etc. in copper is very small, It can form brittle compounds with copper, which has little effect on electrical conductivity, but can reduce processing plasticity. Let’s talk about the processing characteristics of copper strips:

Copper strip

1. The position where the two edges of the ball-end knife for finishing machining intersect should be thin. Such a tool is sharp and reduces friction during processing. When processing the position with small curvature, the processing effect is better.
2. The protruding length of the tool should be as short as possible, or use a thicker tool holder to increase the strength of the tool and reduce the deformation during processing. This has a relatively large impact on the finish of the processed workpiece.
3. The characteristic of the copper strip material itself is that it is relatively soft and sticky. When processing, pay attention to using sharp knives. At present, some cutting tool manufacturers specialize in the processing of copper materials and use ultra-fine particle cemented carbide materials to grind the cutting tools, and the processing effect is better.
4. When processing copper materials, the cutting line speed has no obvious effect on the life of the tool. In other words, when processing copper materials, the adjustable range of the spindle speed is relatively large. Generally speaking, when using a φ6 flat bottom knife, the spindle speed is around 14000 (rev/min).
5. The chip breaking characteristics of the copper strip material are not good, and it is easy to form relatively long chips. Therefore, the rake face of the tool to be processed must be smooth, which can reduce the friction between the chip and the tool. This point is also more important, it has a greater impact on the use of the tool.
6. When processing red copper materials with self-ground knives, the back angle can be larger to improve the sharpness of the knives. Also pay attention to the polishing of the rake face. The particles of the grinding wheel should be fine, so as to grind out sharp knives. When pointing, the angle of the point point is smaller, so that the processing effect is better.