THEORETICAL STUDY CONCERNING USE OF ASYMMETRIC ROLLING PROCESS TO ELEMINATE BORE POLYGONIZING OF STEEL TUBE DURING SIZING/REDUCING

Causes responsible for bore polygonning of steel tube which appears as a defect during sizing and reducing are analyzed and common-used control methods therefor described. A simplified asymmetric rolling process capable of eliminating the said defect is put forward and relevant calculation conducted. The result shows that theoretically the said defect can be eliminated by the process.