Processing method and device for internal thread

Abstract

When processing an internal thread into a hole of a metal material having a hole for internal thread processing, the externally threaded tool does not rotate but revolves only on a certain horizontal plane while the metal material is held or fixed. The threaded groove is formed by transferring the shape of the processed part while successively pressing the processed part of the externally threaded tool against the inner circumference of the hole. It has: a main body of the processing machine, which holds or fixes a metal material with a hole for internal thread processing; an X-axis and Y-axis worktable that can control movement, and exerts the required pressing force relative to the main body of the processing machine to perform an arc. Swing; and the external thread-like tool is fixed on the X-axis-Y-axis workbench; the external thread-like tool fixed on the X-axis-Y-axis workbench does not rotate, but only rotates on a certain horizontal plane while moving The processed portion of the externally threaded tool is pressed against the inner circumference of the hole one after another, while transferring the shape of the processed portion, thereby forming a threaded groove.

Description

technical field [0001] The present invention relates to a method and an apparatus for forming an internal thread on a hole of a metal material having a hole for internal thread processing. Background technique [0002] It is well known that the internal thread constitutes one side of the thread as the most common fastening element. [0003] Conventionally, it is known to process internal threads by tapping. [0004] However, as far as the machining of internal threads with a large diameter is concerned, tapping is usually not used. [0005] The main method of machining a large-diameter internal thread is cutting machining with a single-edged tool (threading tool) (for example, refer to Patent Document 1). [0006] However, in cutting processing with a single-edged tool (threading tool), there are problems such as disposal of generated chips and damage to the edge of the tool due to generation of chips, but there is no alternative method. [0007] In addition, as this inte...

AI Technical Summary

Problems solved by technology

Therefore, the number of control movable parts increases, and as a result, it is impossible to design a high-strength and high-rigidity processing machine

[0009] In addition, since the rotation of the tool corresponding to the number of thread ridges is required (for example, refer to Patent Document 1), the processing time is limited.

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