Composite cutter

Abstract

The present invention discloses a composite cutter which comprises a stainless steel or carbon steel cutter handle part and a tungsten steel cutter head part, the two ends of the cutter handle part are respectively provided with a clamping handle body and a cutter rod body, the cutter rod body outer diameter is smaller than the clamping handle body outer diameter, and a convex column is formed on the central part of the end face, a through hole is formed on the central part of the two end faces of the cutter head part in a through-out manner, one end face of the cutter head part is jointed to the end face of the cutter rod body, the inner peripheral surface of the through hole is jointed to the embossment outer peripheral surface of the cutter rod body, by the way, when the composite cutter is used in tapping or milling, the stainless steel or carbon steel cutter rod body is not easy to break, and meanwhile the bonding strength of the joint parts of the cutter handle part and the cutter head part can be increased.

Description

technical field [0001] The invention relates to a tool, especially a compound tool for thread tapping or milling. Background technique [0002] Generally, cutting tools will form different cutter head shapes according to different functions. For example, those with a pointed head are mostly used to form drilling tools on the workpiece, and those with a flat head are mostly used for processing. A tool for forming threads or milling in a hole that has been formed on an object. Take an existing thread tapping tool that forms internal threads in holes on workpieces as an example, such as Figure 5 As shown, it includes a stainless steel or carbon steel clamping handle 51 and a tungsten steel knife bar 52, the knife bar body 520 rear end of the knife bar 52 is fixedly combined with one end of the clamping handle 51 by welding, the knife bar body 520 A cutter head 521 is formed at the front end, and a thread for tapping is formed on the peripheral surface of the cutter head 521 ,...

AI Technical Summary

Problems solved by technology

[0005] However, although the existing internal thread tapping tool has the characteristics of stainless steel or carbon steel torsion resistance and tungsten steel hardness, the tool body 520 of the tool bar 52 must have a certain length to match the hole diameter on the workpiece. However, the tool body made of hard and brittle tungsten steel cannot bear the torque generated by the high-speed rotation of the tool during the tapping process, and it is easy to break during the tapping process, which not only leads to poor tapping quality and tool damage. loss, and it is also easy to increase the risk of operation

[0006] Because the above-mentioned existing tapping or milling tools work on the workpiece, the cutter body of the tool is easy to break, thus causing the problems of poor thread or milling quality and tool loss. In order to solve this problem, the present invention proposes A compound tool

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