Powder sintering forming method for cutting tool and cutting body thereof

Abstract

The invention relates to a powder sintering forming method for a cutting tool and a cutting body thereof, which comprises the following steps of: manufacturing a cutting body workpiece with the same shape as the cutting body of a drill, a micro drill or a spiral end mill; performing injection coating forming at the periphery and one end of the cutting body workpiece to obtain a thermoplastic plastic mold body; rotatably withdrawing a cutting body forming mold cavity of the plastic mold body from the other end of the cutting body workpiece; injecting cutter material powder and a mixed binder thereof into the cutting body forming mold cavity, and injecting metal powder and a mixed binder thereof into a handle body forming mold cavity of a forming mold to prepare a cutting body powder dense body connected with a handle body powder dense body; extracting, degreasing to separate the binder, and heating to remove the plastic mold body; and sintering the cutting body powder dense body and the handle body powder dense body at a high temperature to prepare the cutting tool integrating the cutter material powder sintering cutting body with the metal powder sintering handle body.

Description

technical field [0001] The invention relates to a cutting tool molding method, in particular to a powder sintering molding method for cutting tools such as drills, micro drills and helical end mills. Background technique [0002] With the rapid development of the electronics industry and the rapid development of electronic products, the size of the printed circuit board (PCB) is getting smaller and smaller. Correspondingly, the processing equipment required in the production process is becoming more and more sophisticated. Drills used for drilling printed circuit boards are smaller than ordinary drills, and the micro drills used for drilling printed circuit boards are consumables. The production of such micro drills is often produced in large quantities. Therefore, if the manufacture of micro drills can be simplified The method will surely reduce the manufacturing cost of the micro-drill. [0003] Known miniature drill bit comprises a handle part and a drill body part, and ...

AI Technical Summary

Problems solved by technology

[0004] However, the handle portion and the drill body portion of this micro-drill must be cut and ground by metal processing machinery to form the concave hole and the corresponding convex rod, which consumes manpower and time, and increases the manufacturing cost.

In particular, the drill body needs to be precisely cut in advance to produce a continuous helical cutting edge, flute and drill tip, which consumes tungsten carbide steel and relatively increases manpower, material resources and costs.

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