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Thread cutting tool

A thread cutting and cutting tool technology, which is applied in thread cutting tools, milling cutters, manufacturing tools, etc., can solve the problems of large cutting load and finishing edge defects, and achieve long-term and stable thread cutting and prevent defects.

Active Publication Date: 2020-06-12
HITACHI TOOL ENG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, with respect to the thread crest of the finishing edge on the front end side that cooperates with the leading edge and cuts the groove portion of the female thread part by two cuts, the groove between the finishing edge on the front end side and the leading edge The cutting load in the part is too large, especially when thread cutting a workpiece formed of high hardness material, such an excessive cutting load acts impulsively, and there is a possibility that the above-mentioned Chipping of the finishing edge occurs in the groove

Method used

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  • Thread cutting tool
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Experimental program
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Effect test

no. 1 approach

[0028] Figure 1 to Figure 4 One embodiment (first embodiment) of the present invention is shown. In the thread cutting tool according to the present embodiment, the tool body 1 is formed in a multi-stage cylindrical shape centering on the axis O from a hard material such as cemented carbide. The rear end side of the tool body 1 (in the figure 1 , figure 2 and Figure 4 The middle is the right side) part is the shank part 2 that maintains the cylindrical shape, and the front end side ( figure 1 , figure 2 and Figure 4 The middle is the left side) part is the cutting edge portion 3, between the handle portion 2 and the cutting edge portion 3 is a neck portion 4 whose outer diameter is smaller than the outer diameter of the handle portion 2 and the cutting edge portion 3. In addition, in this specification, the area|region in the tool main body 1 in which the thread cutting edge 8 mentioned later is formed is called the cutting edge part 3. As shown in FIG.

[0029] Th...

no. 2 approach

[0058] Next, refer to Figure 5 A thread cutting tool according to a second embodiment of the present invention will be described. The thread cutting tool of the present embodiment differs from the thread cutting tool of the first embodiment in the shapes of the first and second finishing edges. In addition, the same reference numerals are assigned to the same parts as those of the first embodiment to simplify description. In addition, the description of the same structure and function as the part with the same name in 1st Embodiment is abbreviate|omitted about the part attached|subjected with a different code|symbol.

[0059] Figure 5 It is a partial enlarged side view of the finishing edge of the thread cutting tool according to this embodiment. In this embodiment, when the second finishing blade 18C is moved to the front end side in the direction of the axis O in parallel with the tangent P, the outer peripheral ends (apexes) of the first and second finishing blades 18B...

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Abstract

In the thread cutting tool, a thread cutting edge is formed on the outer periphery of the front end of the tool body, and the finishing process from the tangent line passing through the root of the second and third grooves to the outer peripheral ends of the first and second finishing edges The thread heights of the cutting edge are equal to each other, the thread height of the leading edge from the above-mentioned tangent to the outer peripheral end of the leading edge is lower than the thread height of the finishing edge, and the thread from the outer peripheral end of the first finishing edge to the first groove part The depth of the first groove portion to the bottom is deeper than the depth of the second groove portion from the outer peripheral end of the second finishing blade to the tooth bottom of the second groove portion.

Description

technical field [0001] The present invention relates to a thread cutting tool in which at least three thread cutting edges protruding toward the outer peripheral side of the tool body are formed on the outer periphery of a tip portion of a tool body rotating around an axis so as to be aligned in the axial direction. [0002] This application claims priority based on Patent Application No. 2016-004701 for which it applied in Japan on January 13, 2016, and uses the content here. Background technique [0003] As such a thread cutting tool, for example, Patent Document 1 proposes a thread cutting tool including a thread cutting edge having a plurality of thread ridges on the outer periphery of the tool body, and the thread cutting edge on the front end side At least one thread tooth is the pilot edge for rough cutting, the other thread teeth are finishing edges, the height of the thread teeth of the pilot edge is lower than the height of the thread teeth of the finishing edge, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23G5/18B23C5/10
CPCB23G5/18B23C5/10B23G2200/44
Inventor 居原田有辉横川满广
Owner HITACHI TOOL ENG LTD