Cutter and tool bit structure thereof

Abstract

The invention relates to the technical field of precise machining tools, and discloses a cutter and a tool bit structure thereof. The tool bit structure comprises a connecting part, and a cutting edgepart arranged at the front end of the connecting part; the cutting edge part comprises a cutting main body fixed at the front end of the connecting part, and multiple first cutting edges; the outer surface of the cutting main body is an arc surface projected outwards; the first cutting edges are spiral; the edge number S of the first cutting edges and the diameter D of the cutting main body meetthe relation of S not smaller than 4D and not larger than 15 D; the diameter D of the cutting main body is 0.5-32 mm; and the edge width L of the first cutting edges is 0.01-0.1 mm. The cutter has thefollowing benefits: the cutter is used for milling curved surfaces; under the same diameter, the edge distribution density is high, the surface roughness is excellent, and the machining efficiency ishigh; and when the cutter is applied to machine 3D glass graphite molds in a CNC, the surface roughness can reach 90 nm.

Description

technical field [0001] The invention relates to the technical field of precision machining tools, in particular to a cutting tool and its cutter head structure. Background technique [0002] Graphite molds are more and more widely used due to their excellent thermal and electrical conductivity, lubricating properties and wear resistance, but graphite molds are not easy to process; at present, when it is necessary to semi-finish or finish machining curved surfaces on graphite molds, ordinary Although the flat bottom milling cutter mills the curved surface, although the processing efficiency is high, the remaining material steps are obvious, and the processing contour is poor; and the current milling cutter is usually coated with a wear-resistant coating on its surface in order to increase its wear resistance. layer (such as WC, diamond, etc.), the processing of the tool is difficult and the life is short, and the roughness and uniformity of the workpiece surface formed by the...

AI Technical Summary

Problems solved by technology

[0002] Graphite molds are more and more widely used due to their excellent thermal and electrical conductivity, lubricating properties and wear resistance, but graphite molds are not easy to process; at present, when it is necessary to semi-finish or finish machining curved surfaces on graphite molds, ordinary Although the flat bottom milling cutter mills the curved surface, although the processing efficiency is high, the remaining material steps are obvious, and the processing contour is poor; and the current milling cutter is usually coated with a wear-resistant coating on its surface in order to increase its wear resistance. layer (such as WC, diamond, etc.), the processing of the tool is difficult and the life is short, and the roughness and uniformity of the workpiece surface formed by the tool are poor

In addition, limited by the small diameter of the cutter head, the distribution density of the blades processed by the existing processing equipment is low, and the distribution density of the blades is directly related to the surface roughness of the workpiece. The processed surface is difficult to meet the increasing requirements for processing accuracy, and the processing efficiency is low

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