Gradually-cutting inner hole cutter and machining method

Abstract

The invention discloses a gradually-cutting inner hole cutter and a machining method. The gradually-cutting inner hole cutter comprises a cutter head and a cutter bar. The cutter head comprises a main cutting edge, an auxiliary cutting edge, a front cutter face, a main rear face and an auxiliary rear face. The main cutting edge and the auxiliary cutting edge are each a section of arc line; the intersection of the main cutting edge and the auxiliary cutting edge is a section of arc line for smooth connection, and inflection points are absent at the intersection between the main cutting edge and the auxiliary cutting edge; and an included angle which is an acute angle is formed between the front cutter face 1c and the direction of main cutting force. The gradually-cutting inner hole cutter and the machining method have the advantages that impact on a traditional cutter due to interrupted cutting is reduced; impact on the traditional cutter due to gaps of a transmission mechanism of a machine tool is reduced, pushing force of the traditional cutter due to impact cutting is changed to pulling force caused by gradually cutting, and cutter back-off during cutting of a traditional turning tool is avoided; and instantaneous displacement of the cutter bar due to cutting impact is reduced, cutting tends to be stable, phenomena of breaking edges and blade jamming are avoided, damage to the traditional cutter due to impact cutting is reduced, the machining accuracy is greatly improved, and rejected products caused by the phenomena of breaking edges, blade jamming and the like are avoided.

Description

technical field [0001] The invention belongs to the technical field of cutters, and relates to a gradually cutting inner hole cutter; it is especially suitable for cutting inner holes with irregular surfaces, surface bumps and undulations, intersecting oblique holes, and intermittent and incomplete inner surfaces. Background technique [0002] Commonly used inner hole cutters such as figure 1 As shown, it includes the front cutter head 1 and the rear cutter bar 2; the front cutter head 1 includes the main cutting edge 1a, the minor cutting edge 1b, the rake face 1c, the main back face 1d, the auxiliary back face 1e, and the tool tip 1g; The cutting edge 1a and the minor cutting edge 1b are linear blades; the tip 1g is generally a small transitional arc; the intersection 1g of the major cutting edge 1a and the minor cutting edge 1b is the inflection point of the linear blade. [0003] During the cutting process, the tool bar 2 is installed on the tool holder of the machine t...

AI Technical Summary

Problems solved by technology

[0005] The invention discloses a gradually cutting inner hole cutter and a processing method to solve the problems in the prior art that the surface of the inner hole is processed irregularly, and the cutting of the inner hole presents intermittent impact cutting, etc.

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