消除管尾三角的一種新方法

A NEW TECHNIQUE TO ELIMINATE STEEL TUBE END TRIANGULAR DEFECT

摘要: 從原理、結(jié)構(gòu)、使用等方面詳細介紹了消除管尾三角的新方法，指出新方法的成功主要在于設置在支撐頂頭和頂桿的支擋裝置上的快速推進控制系統(tǒng)。當軋制臨近管尾時，系統(tǒng)的壓力傳感器便發(fā)出信號，啟動液壓系統(tǒng)的換向閥，同時快推油缸快速向前推動，迅速穿透管坯，改變頂頭相對于軋輥的位置，增大D/S值，從而消除管尾三角。工業(yè)性試驗表明，這是一種簡單而有效的消除管尾三角的方法。

Abstract: A new technique to eliminate steel tube end triangular defect is introduced in the paper,involving working principle,structure and application. It is emphasized that the success of the new technique owes to the quick-push control system mounted. on the plug/bar supporting/stopping arrangement. When rolling the tube end,the pressure cell of the system releases a signal to activate the changeover valve of the hydraulic system and get the quick-push cylinder going fast forward and through the shell,which results in change of position of the plug relative to the rolls and increase of the D/S value, hence eliminating the said end triangular defect. Relevant industrial experimental operation has shown that the said technique is a simple and effective way to eliminate the tube end triangular defect.