Cutting blade for machining screw thread

Abstract

The thread machining cutter with unique groove form includes upper surface, lower surface and three side surfaces constituting cutter body and cutting bit angle. Any two side surfaces are connected by arced surface to constitute cutting bit angle, the top is the front edge surface connected to the cutter body via an arced surface, the front cutter surface and the side surface form cutting edge, and each of the cutting edge is provided with one trimming edge. The front cutting surface has one fanned notch with wavy side walls and one boss with front end extending to inside the notch and tail end extending backwards and ending in the arced surface. The present invention can control the cutting scrap direction and shape during machining, raise the smoothness of the machined surface and the machining efficiency, and may be used in triangular, rectangular, trapeziform and other shaped thread.

Description

technical field

[0001] The invention relates to a thread processing insert, especially an indexable thread processing insert. Background technique

[0002] The thread processing is special, it is different from the ordinary outer circle turning, the two edges of the thread cutter participate in the cutting at the same time and the feed rate is large, the chip becomes wider and wider with the increase of the cutting depth, and the wide and hard chip is very Difficult to break, easy to wrap around workpieces, tools, and fixtures. In addition, the thread cutter has a small tip angle and low strength. Chips rotating at high speed with the workpiece can easily hit the blade and cause chipping. To solve the above problems, it is necessary to solve the problem of chip flow and chip breaking. Generally, thread cutting inserts are provided with some grooves on the rake face of the cutting edge as chip breakers, but in actual use, we found that the curvature of chips formed by cuttin...

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