Pulling and milling machining method for large-diameter non-standard right-handed rotation inner thread

Abstract

The invention discloses a pulling and milling machining method for a large-diameter non-standard right-handed rotation inner thread. A large-diameter non-standard thread machining tool system is usedin the method for conducting large-diameter non-standard right-handed rotation inner thread pulling and milling machining; a milling tool is moved to the innermost position of the inner thread, namelythe bottom position; then, the milling tool moves in the radial direction for feeding and makes contact with the inner surface of a bottom hole, and cutting starts; meanwhile, the milling tool revolves around the center line of an inner hole, outward movement is conducted by the distance of one screw pitch from interior to exterior every circle of revolution till the milling tool moves to the outermost position, namely the mouth part, and complete machining of the inner thread is finished. The machining method has the advantage of milling machining, workpiece precision and surface roughness are high, the tool durability is high, and the comprehensive technical effect is good.

Description

technical field [0001] The invention belongs to the field of large-diameter internal thread processing, and in particular relates to a method for drawing and milling large-diameter non-standard right-handed internal threads. The largest diameter is more than 200mm in diameter. Background technique [0002] At present, the traditional milling internal thread generally adopts the tool feeding method from the outside to the inside. At this time, the milling cutter spindle is gradually pushed out, and the thread milling cutter can adopt the traditional structure. In order to improve the processing quality of the thread surface and the service life of the milling cutter, the milling thread should be processed by down milling. When the commonly used machine tool spindle adopts a milling cutter with a traditional structure, the above-mentioned milling of internal threads from outside to inside is down milling for left-handed threads, and up-milling for right-handed threads. In or...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a large-diameter non-standard right-handed internal thread drawing and milling method, which solves the problem that the axial force of the milling cutter is opposite to that of the push-milling process, and is not suitable for large-diameter non-standard right-handed internal threads processed from the inside to the outside.

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