Overlength straight pipeline member cutting method

Abstract

The invention discloses a method for the cutting processing of an ultra-long straight type pipeline. Firstly, a pipe end expansion piece for the ultra-long pipeline is manufactured, and the pipe end expansion piece consists of a connecting part, at least three expansion pieces evenly arranged and thimble holes arranged in the center of the end parts of the expansion pieces, and a clearance is reserved between each two expansion pieces; a processing pipeline is inserted into a clamping disk, and a pipeline piece is pre-tightened by a claw; the pipe end expansion piece is inserted into the pipeline; the rotary thimbles are pushed in the thimble holes of the pipe end expansion piece; the expansion pieces are expanded and deformed along the radial direction to tightly press against the internal diameter of the pipeline so as to generate the pretension expansion force; and the claw is fastened again; a main shaft is rotated, the cutting feed is performed, and the processing beings. With the mode adopted, the method has the advantages of ensuring the processing quality and safety, improving the production efficiency and lowering the production cost, along with convenient processing operation.

Description

Technical field [0001] The invention relates to a cutting method for ultra-long straight pipe fittings. Background technique [0002] For finished pipe products, the outer circle of the pipe often needs to be turned to achieve higher surface finish and dimensional accuracy. At present, the cutting and processing of ultra-long straight pipe fittings use horizontal lathes, which rely on their own jaws to clamp the workpiece. Because the processing center of gravity of the ultra-long pipe fittings moves forward, when the workpiece rotates at high speed, the rotation axis of the workpiece and the lathe spindle is A slight misalignment will cause violent jumps of the workpiece, which makes it difficult to ensure the processing quality and processing safety; sometimes, to ensure the normal processing of turning processing, use the center top hole or triangle bracket or follow the tool holder to position the opposite side of the clamping end Processing, but this kind of technology is no...

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