Turning method for thin and long threaded shaft

Abstract

The invention discloses a turning method for a thin and long threaded shaft. A turning device for the thin and long threaded shaft is used in the method and is installed on a carriage of a lathe. The turning device comprises a base, a guiding sleeve, a telescopic sleeve, a tool reset ring, a thread length control mechanism and a tool assembly. The turning device has the beneficial effects that due to the fact that scale marks are arranged on the surface of the outer circle of the part, close to a shaft ring, of the thin and long shaft, the length value of a to-be-turned thread can be accurately adjusted by adjusting the axial position of a screw sleeve; due to the fact that three sets of turning tools are distributed evenly in the circumferential direction, deformation of the threaded shaft in the turning process is reduced, and the machining quality is ensured; due to the fact that a slope A and a slope C which can be in contact or be separated are arranged, ending machining of the thread can be accurately achieved, and the phenomenon of tool crashing is effectively avoided; and due to the fact that the tool reset ring is arranged, the three sets of turning tools can contract towards the center at the same time, and operation is fast and convenient.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a turning method of an elongated threaded shaft. Background technique [0002] For threads with small nominal diameter, long processing length and poor workpiece rigidity, it is difficult to clamp the workpiece during processing, the thread cutting is not stable, and the workpiece is difficult to maintain a stable state, etc., resulting in bending deformation of the axis of the external thread of the slender rod and irregular thread profile. , disordered teeth and other problems, the material of the external threaded part of the slender rod has good plasticity and toughness, but poor hardness. In addition, if the threaded part is located in the middle of the slender shaft, due to the small diameter and poor rigidity of the workpiece, a large deformation will occur during the cutting process and the machining cannot continue. Contents of the invention [0003] The...

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Problems solved by technology

[0002] For threads with small nominal diameter, long processing length and poor workpiece rigidity, it is difficult to clamp the workpiece during processing, the thread cutting is not stable, and the workpiece is difficult to maintain a stable state, etc., resulting in bending deformation of the axis of the external thread of the slender rod and irregular thread profile. , chaotic teeth and other problems, the material of the external threaded part of the slender rod has good plasticity and toughness, but poor hardness

In addition, if the threaded part is located in the middle of the slender shaft, due to the small diameter and poor rigidity of the workpiece, a large deformation will occur during the cutting process and the machining cannot continue

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