طراحي و ساخت غلتك هاي شكل دهي غلتكي سرد لوله هاي گرد به كمك رايانه

THE COMPUTER DESIGN AND MANUFACTURING OF ROLLS FOR CIRCULAR PIPES IN THE COLD ROLL FORMING PROCESS

Generally, in pipe manufacturing industries, roll design, in the cold roll forming process, is performed, based upon experiments and the qualitative choice of the de­signer. In this paper, a computer program is provided to reduce the number of qualitative decisions. In this re­search, rolls are designed, based on the Kiuchi method, using a sine shape function. Elasto-plastie analysis is done for determining the 3D shape of strips, strain, stress distribution and the consumed roll power between roll stands. Then, by equalizing the power for all roll stands, the rolls arc designed. Finally, considering the techno­logical parameters of the process and the dimensions of the machines, a SCRIPT file for manufacturing the rolls is prepared for the user. Using the results of the point test, based on CAD/CAM principals, it is shown that the results of the provided computer program, for the 3D shape of the strips, are consistent with experimental data.