Hole machining tool bit and hole machining tool

Abstract

The invention discloses a hole machining tool bit and a hole machining tool. The hole machining tool bit is provided with a cutting edge set, the cutting edge set comprises circumferential cutting edges, at least one circumferential cutting edge is provided with an arch cutting edge, a circumferential high protruding point is arranged between the two end points of the arch cutting edge, the radius of curvature of the high protruding point is R, and R is equal to or larger than 50 mm and equal to or smaller than 1000 mm. The hole machining tool bit has the advantages that machining precision is high, the machining surface quality is high, and cutting vibration is small. The hole machining tool comprises a tool body and further comprises the hole machining tool bit, and the hole machining tool bit is fixedly arranged on the tool body. The hole machining tool correspondingly has the advantages that machining precision is high, the machining surface quality is high, and cutting vibration is small.

Description

technical field [0001] The invention relates to a cutting tool, in particular to a hole processing cutter head and a hole processing tool. Background technique [0002] The cutting edge of the hole machining tool is in contact with the processing surface at the same time in the circumferential direction and at the end, and the corresponding processing surface of the circumferential cutting edge has a relatively large length. The tool is easy to break, causing the scrapping of the hole machining tool or even the workpiece. In order to avoid this situation, the peripheral cutting edge of the hole machining tool is generally made into a blade-shaped structure with a certain inverted cone in the industry. [0003] In order to reduce the cost of using tools, detachable hole machining tools are widely used in the prior art. Due to the existence of manufacturing and assembly errors, it is difficult to accurately control the reverse taper angle of the peripheral cutting edge for det...

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Problems solved by technology

[0002] The cutting edge of the hole machining tool is in contact with the processing surface at the same time in the circumferential direction and at the end, and the corresponding processing surface of the circumferential cutting edge has a relatively large length. The tool is easy to break, resulting in the scrapping of the hole machining tool or even the workpiece. In order to avoid this situation, the peripheral cutting edge of the hole machining tool is generally made into a blade-shaped structure with a certain inverted cone in the industry.

[0003] In order to reduce the cost of using tools, detachable hole machining tools are widely used in the prior art. Due to the existence of manufacturing and assembly errors, it is difficult to accurately control the reverse taper angle of the peripheral cutting edge for detachable hole machining tools. , and when the reverse taper of the peripheral cutting edge is a positive taper, the cutting load and cutting vibration will be greatly increased. In order to avoid this situation, the peripheral cutting edge of the detachable hole processing tool generally has a larger Inverted cone, and with the development of the manufacturing industry, the requirements for the circumferential machining surface roughness of the peripheral cutting edge are getting higher and higher. With such a high surface quality requirement, the peripheral cutting edge of a large inverted cone cannot meet such high-precision surface quality processing Requirements, and because hole machining tools generally have a large length-to-diameter ratio, when the verticality of the machine tool spindle is not ideal, it is easy to cause inconsistent hole machining radii in all directions on the side machining surface

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