Wire-drawing nanometer graphite lubricant of single crystal copper bonding wire and preparation method of lubricant

Abstract

The invention discloses a wire-drawing nanometer graphite lubricant of a single crystal copper bonding wire. The wire-drawing nanometer graphite lubricant is prepared by adding 100ppm-150ppm of nanometer graphite to a common lubricant through ultrasonic stirring. The nanometer graphite in the lubricant can enter a lubricating gap, so that the lubricant is not extruded out under high pressure; the preparation method has the advantages that the lubricating time is long, the lubricating effect is good, and a wire-drawing mould is difficult to damage; and besides, service life of the mould is remarkably prolonged, the energy consumption and the cost are remarkably reduced, and the economic value and the social value are remarkable.

Description

technical field [0001] The invention relates to a lubricant, in particular to a lubricant for single crystal copper bonding wire drawing. Background technique [0002] The key technology for the production of single crystal copper bonding wire is the wire drawing process, which is related to production efficiency, product quality, equipment utilization, equipment investment and production cost. The main equipment of the wire drawing process is the wire drawing machine and the wire drawing die, and the wire drawing die determines the production efficiency. , product quality, equipment utilization, equipment investment and production costs. [0003] Among them, the working state and life of the wire drawing die are affected by the following seven factors: [0004] (1) Try to choose high-quality cemented carbide wire drawing dies produced by advanced mold processing technology, or diamond wire drawing dies: [0005] At present, the grinding process of foreign drawing dies gen...

AI Technical Summary

Problems solved by technology

However, many domestic manufacturers are still using backward equipment and using manual operations to grind the pass. Therefore, there are the following problems: the pass parameter fluctuates greatly, and it is difficult to process a straight working cone; It is easy to grind out the transition angle, which will cause secondary compression of the wire in the sizing area, increase the external friction, shorten the length of the sizing area, and shorten the service life of the mold; the frequency of repairing the worn grinding needle varies from person to person, use Irregularity leads to poor consistency of the hole type; the detection methods are also backward, and can only be detected by simple tools such as visual inspection or magnifying glass, microscope, etc., and the focus is on the surface finish inside the mold, and the hole size cannot be effectively detected, let alone control up;

However, it has not been applied to the single crystal copper bonding wire drawing process and added to the drawing oil. The reason may be that its particle size is very small and the special physical and chemical properties of the drawing oil make it unable to be effectively dispersed and uniform. or other reasons

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