Additive and subtractive machining device and method for ultra-long pipe fitting

Abstract

The invention relates to the technical field of laser additive manufacturing, and particularly relates to an additive and subtractive machining device and method for an ultra-long pipe fitting. The device comprises a rotating table, a laser additive part, a subtractive part and a limiting part, wherein the rotating table is provided with a base plate used for conducting additive on the pipe fitting and can drive the base plate to rotate in the circumferential direction of the pipe fitting; the laser additive part is used for conducting additive on the substrate to form a pipe; the subtractive part comprises a milling head and a grinding head, the milling head is used for conducting subtractive machining on the outer wall of the pipe formed through additive machining, and the grinding head is used for conducting subtractive machining on the inner wall of the pipe formed through additive machining; and the limiting part is arranged to be in contact with the outer wall of the milling section of the pipe when the pipe is at the subtractive position. By means of the mode of alternate additive and subtractive, a section of short pipe is firstly subjected to additive, only the inner wall and the outer wall of the short pipe are subjected to subtractive machining at a time, in this way, the machining precision of the inner wall of the pipe can be guaranteed, the requirement for equipment is low, and it can be guaranteed that the precision of the inner hole of the machined long pipe meets the use requirement by repeatedly conducting additive and subtractive.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing, in particular to an additive and subtractive material processing device and method for super-long pipe fittings. Background technique [0002] Super-long pipe fittings generally refer to pipes with an aspect ratio ≥ 40. Long pipe fittings are generally processed through deep holes during processing. Influenced by subjective and objective comprehensive factors such as operating skills not reaching a certain level, the actual drilling will always deviate from the center line of the blank, and the wall thickness of the pipe wall exceeds the allowable error, causing the drill to run out of the blank in an instant before reaching the end of the blank and be scrapped , it is difficult to get through, and due to the shaking of the drill pipe, the holes of the ultra-long and fine-hole ultra-high pressure alloy steel pipes are not straight linear, but a curved structure, so that the w...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a processing device and method for adding and subtracting materials for super-long pipe fittings. Through the alternate method of adding materials and reducing materials, a shorter pipe can be processed at one time, and the inner wall can be processed by reducing materials. The problem of low precision of the inner hole of the long pipe caused by the low

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