Miniature ultra-hard drilling and milling cutter special for machining ceramic materials and machining method thereof

Abstract

The invention discloses a miniature ultra-hard drilling and milling cutter special for machining ceramic materials and a machining method of the miniature ultra-hard drilling and milling cutter. The miniature ultra-hard drilling and milling cutter is a round stick made of a hard alloy. One end of the round stick is provided with a chip groove which extends inwards from the tip. A blade groove is further formed downwards in the chip groove. A polycrystalline diamond compact is fixedly connected into the blade groove. The polycrystalline diamond compact is provided with a first side face and a second side face which are perpendicular to each other. The first side face of the polycrystalline diamond compact protrudes out of the round stick in the axial direction of the round stick and forms a bottom cutting edge of the drilling and milling cutter. The second side face of the polycrystalline diamond compact protrudes out of the round stick in the radial direction of the round stick and forms a circumference cutting edge of the drilling and milling cutter. According to the miniature ultra-hard drilling and milling cutter of the structure, holes of the ceramic materials such as aluminum oxide and zirconium oxide can be machined in a drilling and milling mode, defects existing in the prior art can be overcome, and the miniature ultra-hard drilling and milling cutter has the advantages of being high in drilling speed, low in machining difficulty and machining cost and good in machining effect.

Description

technical field [0001] The invention relates to the field of tool manufacturing in the machining industry, in particular to a miniature superhard drill and milling cutter specially used for machining holes in ceramics such as alumina and zirconia and a machining method thereof. Background technique [0002] Ceramic materials have excellent characteristics such as high strength, high hardness, low density, low expansion coefficient, wear resistance, corrosion resistance, heat insulation, and good chemical stability. They have become widely used in aerospace, petrochemical, instrumentation, machinery manufacturing and New engineering materials in nuclear industry and other fields. However, since ceramic materials have the characteristics of high brittleness, low fracture toughness, and the elastic limit and strength of the material are very close, the processing of ceramic materials is very difficult, and a slight improper processing method will cause damage to the surface lay...

AI Technical Summary

Problems solved by technology

At present, the mechanical processing method is limited to the processing of holes with a diameter of about several millimeters, and it is still difficult to obtain ideal economic effects and surface processing quality.

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