The Research On Distortion Mechanism Of Three-roll Rotary Rolling Mill For Pipe Flans

In recent years, planetary rolling process on continous casting of copper tube billiet, which gradually replaces the tradional extrusion process, is an critical technology on short-stage process of copper tube, thus production efficiency maxima bump, product quality fitness, stabilized. However, its dying and processing mostly rest up on limited experience and heuristic foundation. Debugging cycle length, outlay, the product performance and vice had no control, yielding stability and rate of finished products in addition treat ramp out.In order to improve the copper alloy rotating performance of three-roll rotary rolling mill and the efficiency of rotating mill.In this paper, first, the structure principle for the three-roller planetary mill, the rolling mechanism and the movement are introduced. Moreover, relation between the offset angle,the inclined angle and rolling process and distort characteristic of workpiece were detailedly discussed. Whereafter, this paper also is focused on using the finite element method to simulate and analyze the planetary rolling process. A basic geometric model of the planetary rolling millthat considers roll profiles and offset angle of the rolls was constructed. Subsequently, plastic pug is used to simulate the process of copper alloy rotary, also an orthotropic simulating experiment of three-roll planetary mill is processed by orthotropic experimental method. A research about the relationship between parameters (deflecting angle of the roller,the rotating speed of the roller,the friction coefficient of the roller,the initial temperature of plastic pug) of rotating process and the screw-pitch of plastic pug. The results of the experiment are as follows:The effect of product improves greatly when the roller has a 7°deflecting angle; The higher the rotating speed of roller, the better the processing effect. the friction coefficient of the roller and the initial temperature of plastic pug have a great effect on the rotating process, so lower friction coefficient and higher initial temperature are demanded.