Controlling method of rolling for skew rolling mill
专利汇可以提供Controlling method of rolling for skew rolling mill专利检索，专利查询，专利分析的服务。并且PURPOSE:To prevent unequalization of the wall thickness distribution in the longitudinal direction of a hollow pipe after being rolled, by canceling a real advancing motion caused by the thermal expansion of a plug bar piercing or reducing in wall thickness and streching a blank material such as round bar in cooperation with rolls, by retreat of a plug bar holding device with the progress of rolling. CONSTITUTION:A material speed V at the exit side of a blank round bar 20 rolled by barrel-shaped rolls 10 and a plug bar 16 is stored by a main arithmetic device 48 for every condition. Then in piercing, simultaneously with biting of the 1st material of a lot by the rolls 10; an actual current value and the number of revolutions of the roll outputted from a main motor controlling device 34, an actual rolling load from a roll measuring device 38, and an actual plug bar load from a plug bar measuring device 42 are respectively inputted to the device 48 at every hour. Then the device 48 computes the speed V and an expansion quantity of the plug 16 expanding at every hour, basing on these several pieces of information to output the computed results to a controlling device 46 of the plug bar holding position, thereby continuously retreating the position of a plug bar holding device 14 with the proceeding of rolling until the material 10 is run out.，下面是Controlling method of rolling for skew rolling mill专利的具体信息内容。
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