Automatic heat treatment system for stainless steel shank of micro-drill

Abstract

Aiming at solving the problems that a solid carbide drill for drilling of a printed circuit board is high in cost, and the drilling quality of a drill formed by welding of a stainless steel shank and tungsten carbide cannot be up to the standard of a solid tungsten carbide drill due to the welding strength, the invention provides an automatic heat treatment system for a stainless steel shank of a micro-drill. The automatic heat treatment system can perform heating, quenching and cleaning treatment on the stainless steel shank, and the treated stainless steel shank is welded with tungsten carbide, so that the welding strength is remarkably improved, and the drilling requirement of the printed circuit board is satisfied.

Description

technical field [0001] The invention relates to the field of heat treatment, in particular to an automatic heat treatment system for a micro-drill stainless steel handle. Background technique [0002] In the printed circuit board manufacturing process, micro-drills are usually used to drill holes on the circuit board to connect the inner layer of the circuit board. The precision of the printed circuit board drilling is high, and the hole position accuracy is within 30 μm; although Using tungsten carbide as the material of the drill, cutting the tungsten carbide into a miniature drill can meet this requirement. Although this kind of drill has better rigidity and hardness, better hole position accuracy and longer service life Long, but because tungsten is a rare metal, the overall manufacturing cost of tungsten carbide cemented carbide is too high, and the drill is a consumable in the printed circuit board process. The use of this drill will significantly increase the economic...

AI Technical Summary

Problems solved by technology

[0002] In the printed circuit board manufacturing process, micro-drills are usually used to drill holes on the circuit board to connect the inner layer of the circuit board. The precision of the printed circuit board drilling is high, and the hole position accuracy is within 30 μm; although Using tungsten carbide as the material of the drill, cutting the tungsten carbide into a miniature drill can meet this requirement. Although this kind of drill has better rigidity and hardness, better hole position accuracy and longer service life Long, but because tungsten is a rare metal, the overall manufacturing cost of tungsten carbide cemented carbide is too high, and the drill is a consumable in the printed circuit board process. The use of this drill will significantly increase the economic cost of printed circuit board manufacturing.

[0003] At present, mainstream drill bit manufacturers use stainless steel handles and tungsten carbide blades, which are welded together or shrunk by high-frequency current induction heating to make round bars, and then processed into drill bits, but stainless steel is currently used. The drilling quality of the drill bit welded by the shank and the tungsten carbide cemented carbide still cannot reach the level of the overall tungsten carbide cemented carbide. Welding, also can not carry out any heat treatment process to it; And stainless steel also belongs to the material that is more difficult to weld, therefore welds both, welding strength depends on the heat treatment effect of stainless steel knife handle, has not yet done to stainless steel knife handle in the prior art Precise heat treatment system, so to provide an automatic heat treatment system for micro-drill stainless steel handles, which is the direction for the relevant manufacturers engaged in micro-drills to study and improve.

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