Method used for drilling tool thread repair by using numerically controlled lathe

Abstract

The invention provides a method used for drilling tool thread repair by using a numerically controlled lathe, and belongs to the field of thread machining. The method comprises the steps that firstly,tool selection is conducted; secondly, a thread turning starting point is determined; thirdly, tool setting is completed, wherein the fact that a tool nose does not collide with a workpiece to be repaired is used as a basis in the X direction, in the Z direction, the tool nose is located in the middle of threads and then moved into a spiral groove of the threads, the radial X and axial Z positionof the tool nose is slightly adjusted until the tool nose coincides with the spiral groove, single step run is selected, reading is conducted through public variables, and tool setting operation is completed; fourthly, the tool nose is moved to the position of N thread pitches of the tool setting spiral groove to serve as an initial point of continuous machining; and fifthly, continuous machiningis carried out to complete thread repair. According to the method, the inaccuracy caused by human factors is eliminated, the drilling tool repair quality is improved, dimensional stability is realized after thread repair, the numerically controlled lathe runs automatically, the labor intensity is reduced, and the efficiency is high.

Description

technical field [0001] The invention belongs to the field of thread repairing methods, and relates to the repairing of drilling tool threads for well drilling, in particular to a method for repairing drilling tool threads using a numerically controlled lathe. Background technique [0002] At present, most of the thread repairs of oil drilling tools are repaired by ordinary pipe thread lathes. Due to the influence of the operator's work experience and the precision of the lathe, the taper, tooth shape, chamfer and other parts of the thread are prone to errors, resulting in repeated repairs of drilling tools. Shortened drill tool life. At the same time, if the operator bends down to operate the lathe for a long time, it is easy to cause waist fatigue. If it goes on for a long time, it will affect the health of the operator, and also affect the processing efficiency and product quality. Contents of the invention [0003] The problem to be solved by the present invention is t...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the thread repairs of oil drilling tools are repaired by ordinary pipe thread lathes. Due to the influence of the operator's work experience and the precision of the lathe, the taper, tooth shape, chamfer and other parts of the thread are prone to errors, resulting in repeated repairs of drilling tools. Reduced drill tool life

At the same time, if the operator bends down to operate the lathe for a long time, it is easy to cause waist fatigue. If it goes on for a long time, it will affect the health of the operator, and also affect the processing efficiency and product quality.

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