PLANETARY PIPE ROLLING MILL AND PLANETARY ROLLING METHOD FOR COPPER ALLOY PIPE

摘要

A planetary pipe rolling mill includes a feeding mechanism for feeding hollow casting blank, a planetary main machine (1) for rolling the hollow casting blank within which a roller group (11) and a rolling-die quick-cooling mechanism are provided, an inducing preheating mechanism (2) provided between the outlet of the feeding mechanism and the inlet of the planetary main machine (1) for preheating the hollow casting blank, and an inducing soaking mechanism (3) and a slow-cooling mechanism (4) provided at the outlet of the planetary main machine (1) in this order. The pipe having been rolled and quickly cooled is again heated by the inducing soaking mechanism (3) and slowly cooled by the slow-cooling mechanism (4). A planetary rolling method for copper alloy pipe comprises the following steps: machining the hollow casting blank, preheating the hollow casting blank by the inducing preheating mechanism (2), rolling the hollow casting blank by the planetary main machine (1), quickly cooling the resulting pipe by the rolling-die quick-cooling mechanism, and at last heating the pipe by the inducing soaking mechanism (3) once again and then slowly cooling the pipe by the slow-cooling mechanism (4) in protective atmosphere.