Machining process of rotation-torsion threaded copper pipe

Abstract

The invention relates to a machining process of a rotation-torsion threaded copper pipe, which comprises the following steps of: selecting a copper pipe with the wall thickness T of 0.7 + / -0.03mm, wherein the copper pipe is in a state of TP2Y2 and has the hardness of 90 to 100HV; and then cutting the processed copper pipe by using a metal cutting machine so as to cut the processed copper pipe into copper pipes to be processed with the same length, cleaning the copper pipes to be processed by using a water-soluble cleaning agent and drying the copper pipes to be processed. The machining process is characterized in that the dried copper pipes to be processed are fed into a threaded pipe machine through a conveying device, core rods are inserted into the copper pipes to be processed; one ends of the copper pipes to be processed and one ends of the core rods are clamped in a first chuck of the threaded pipe machine, one ends of the copper pipes are fixed firmly, the other ends of the copper pipes to be processed are clamped in a second chuck of the threaded pipe machine and can rotate, three pressing pit needles are distributed at the position of the second chuck of the threaded pipemachine, the walls of the copper pipes to be processed are radially pressed by the three pressing pit needles, the stresses at the positions of the thread forming initial ends of the copper pipes to be processed are changed and the three pit needles extend towards the other ends along with the rotation of the second chuck to form three spiral grooves, so that screw threads are formed; and then the copper pipes to be processed are cleaned by using the water-soluble cleaning agent, are dried, are subjected to vacuum annealing to be in a soft state TP2M and are checked and packaged. The machining process has the advantages of high production efficiency, stable quality of the produced products, a large number of bending times and the like.

Description

technical field [0001] The invention relates to a processing technique for twisted thread pipe copper. Background technique [0002] The current rolling thread forming process is: use a metal cutting machine to cut the copper tube to be processed, cut the copper tube into a copper tube of the same length, then clean and dry, and then vacuum anneal into a semi-hard TP2Y2. Hand-rolled the thread, punched the spot, then cleaned and dried, then vacuum annealed into a soft TP2M, and finally inspected and packaged. Its production speed is slow, the product molding quality is unstable, and the number of bending times is low. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high production efficiency, stable product quality, and a large number of bending times twisted thread pipe copper processing technology. [0004] In order to achieve the above object, the present invention is achieved in th...

AI Technical Summary

Problems solved by technology

Its production speed is slow, the product molding quality is unstable, and the number of bending times is low

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