Thread machining blade

Abstract

The invention discloses a thread machining blade which comprises a blade body. The blade body is provided with a blade center hole and cutting edge parts. Each cutting edge part is defined by a front blade surface, a cutting edge angle arc surface and two cutting edge angle side surfaces in an enclosed mode, wherein the two cutting edge angle side surfaces intersect with the front blade surface to form two side cutting edges, the included angle between the two side cutting edges is a cutting edge angle, the front blade surface is connected with the upper surface of the blade body through a connecting curved surface, the front blade surface is provided with a chip guiding groove which is arranged in a symmetric mode relative to the angular bisector N of the cutting edge angle, a spherical chip breaking boss higher than the front blade surface is formed in an outward protruding mode from the inside of the chip guiding groove, a triangular chip breaking boss is formed by extending from the connecting curved surface towards the inside of the chip guiding groove, and the triangular chip breaking boss is connected with the chip guiding groove in a circular arc transition mode. The thread machining blade has the advantages that machining is easy and fast, chips are low in friction in the flowing process, the degree of finish of a workpiece thread is high, the blade is high in strength, machining efficiency can be effectively improved, and production cost is lowered.

Description

technical field [0001] The invention relates to thread processing inserts, in particular to indexable thread processing inserts. Background technique [0002] Thread turning is special. During thread processing, the two cutting edges of each cutting edge corner of the thread insert participate in cutting at the same time and the feed rate is large. The chips become wider and wider with the increase of cutting depth, wide and hard. Chips are difficult to break and easily entangled on the workpiece, tool and fixture. The cutting edge angle of the threading insert is small and low in strength. The chips rotating at high speed with the workpiece are easy to hit the blade and cause chipping. The entanglement of the chip will also cause the workpiece The thread finish is degraded, and the entanglement of chips is also easy to cause danger to the operator. At the same time, when the threaded insert is processing plastic and viscous materials such as stainless steel, alloy material...

AI Technical Summary

Problems solved by technology

[0002] Thread turning is special. During thread processing, the two cutting edges of each cutting edge corner of the thread insert participate in cutting at the same time and the feed rate is large. The chips become wider and wider with the increase of cutting depth, wide and hard. Chips are difficult to break and easily entangled on the workpiece, tool and fixture. The cutting edge angle of the threading insert is small and low in strength. The chips rotating at high speed with the workpiece are easy to hit the blade and cause chipping. The entanglement of the chip will also cause the workpiece The thread finish is degraded, and the entanglement of chips is also easy to cause danger to the operator

At the same time, when the threaded insert is processing plastic and viscous materials such as stainless steel, alloy materials, and non-ferrous metals, the edge of the rake face of the insert is prone to built-up edge and crescent phenomenon due to reasons such as unsuitable cutting speed, which causes the strength of the insert to decrease and the shape of the insert Dimensional changes and other phenomena will cause a rapid decrease in blade life, reduce production efficiency, and increase production costs.

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