Producing method for precision superlong copper alloy pipe

Abstract

The invention discloses a method for manufacturing a precision super-long copper alloy tube, which comprises the steps of performing surface machining and removing impurities on the horizontal continuous casting copper alloy tube billet, introducing the tube blank with the surface machined and removing impurities into rolling equipment, and adopting differential temperature The rolling deformation is performed by the spinning rolling method. The method of the differential temperature spinning rolling is: control the deformation of the tube blank to be less than 20%, rely on the heat energy generated by its own deformation to raise the temperature of the tube blank to 380-500 ° C, and then increase the deformation to 80 % or more, the temperature of the tube billet is rapidly raised to 720-880°C for rolling and forming, and then rapidly cooled to below 50°C in an oxygen-free environment to make a rolled tube, and then double-stretched and high-speed disc stretching equipment is used for multiple Pass stretching into finished product specifications, and finally through online continuous annealing and eddy current testing to make coiled tubes, straight tubes, or mosquito coils. The invention adopts a differential temperature spinning rolling method, which has the advantages of fewer manufacturing steps, easy temperature control, high product precision, easy large-scale production, less damage to equipment during production, and low cost.

Description

Technical field: [0001] The invention relates to the manufacture of metal pipes, in particular to a method for manufacturing precision copper alloy pipes, which is especially suitable for the production of high-precision ultra-long copper alloy condensation pipes. Background technique: [0002] At present, most of the production of copper alloy pipes at home and abroad adopts the extrusion method, and a few adopt the piercing and rolling method. Practice has proved that both of these two traditional preparation methods have many processes, low yield, high pipe manufacturing cost, poor product precision, and it is difficult to produce super long pipes. Chinese patent application number is 02138022.8 titled "method for manufacturing copper and copper alloy pipes by warm processing" and application number is 03149757.8 "method for manufacturing copper and copper alloy pipes by planetary rolling mill". The previous application includes the steps of preheating the tube blank, ro...

AI Technical Summary

Problems solved by technology

This is the most advanced copper alloy pipe processing method known so far. It basically overcomes the temperature range of the above-mentioned warm rolling mill immediately rising to 701-850°C. It is not easy to realize in operation, and the impact on gears and other equipment cannot be avoided. , affecting equipment life