| 摘要 |
Invention relates to metallurgy and can be used at rolling of metals. The method of rolling-separation of breakdown bar includes forming the breakdown bar of rectangular billets connected together by cross connections along narrow faces and longitudinal separation of billets by rolling in plain rolls at relative reduction, which is equal, at least, to the double relative thickness of cross connections. Forming of breakdown bar from rectangular billets is performed from semi-finished rolled stock, which has 0.25-0.4 ratio of thickness of cross connection to its height. In this case the front end in semi-finished rolled stock is cut along a concave curve or rectilinearly and perpendicularly to the axis of breakdown bar. Due to use of semi-finished rolled stock with flat or concave front end and with assigned relationship of the dimensions of cross connection and profile of semi-finished rolled stock the invention provides for decrease of the development of irregularity of drawings over the section of breakdown bar and thus for conservation at its front end the design pattern of separation by cutting. |
