Producing method for precision superlong copper alloy pipe

Abstract

A technology for manufacturing high-precision ultra-long Cu-alloy tube includes such steps as horizontal conticasting to obtain raw Cu-alloy tub, mechanically removing impurities from its surface, differential-temp spinning rolling including small-deformation rolling to raise its temp to 380-500 deg.C and great-deformation rolling to raise its temp to 720-880 deg.C, and fast cooling in non-oxygen environment.

Description

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

AI Technical Summary

Problems solved by technology

However, it relies on the heat energy released by the large deformation to immediately raise the temperature of the rolling mill to the temperature range of 701-800°C during the initial rolling, which is not easy to achieve in operation, and the impact on gears and other equipment is inevitable, which affects the life of the equipment.