Precision rolling methods for groove-section ring based on different contact and feed mode

Groove-section rings, as a kind of profile rings, are widely used in oil and gas pipeline valves, bearings, and aircraft engine casings. According to the geometric feature of groove, they can be divided into symmetrical shallow-groove ring, symmetrical deep-groove ring, and asymmetrical deep-groove ring. In this paper, based on different contact and feed modes during ring rolling, three kinds of rolling methods for the three kinds of groove-section rings are presented, which are named ring rolling with single contact and single feed (RSCSF), ring rolling with multiple contacts and single feed (RMCSF), and ring rolling with multiple contacts and multiple feeds (RMCMF). The above three rolling methods for three different groove-section rings are explored by FE simulation. The geometric accuracy of rolled ring and the material flow behavior during ring rolling are discussed comprehensively. The results show that the RSCSF technology is feasible for symmetrical shallow-groove ring, the RMCSF technology is reasonable for symmetrical deep-groove ring, and the RMCMF technology is suitable for asymmetrical deep-groove ring. Experiment studies on three typical groove-section parts rolled by the above three kinds of rolling methods are performed. The experiment results indicate that the three rolling methods for three kinds of groove-section rings are feasible. This study can provide a reliable guide for precision forming groove-section ring.