为了在ХПТР冷轧管机上获得高精度优质的冷轧管材,首先应保证管坯表面无压痕、划伤和裂缝等缺陷。 过去,ХПТР冷轧管机大多用爪式卡盘夹紧管坯进行送坯。由于这种卡盘实现机械化相当复杂,因此采用手工操作夹紧管坯。通常,操作工人在夹紧管坯时,为了可靠起见,往往用力过大,结果使管坯在夹紧处出 In order to obtain high-precision and high-quality cold-rolled pipe in ХПТР cold-rolling mills, first of all, defects such as indentation, scratches and cracks on the surface of the billet should be ensured. In the past, most ХПТР cold-rolled tube gripping chuck with jaw chuck billets. Due to the complex mechanization of the chuck, the tube is clamped manually. Usually, when the operator clamps the tube blank, for the sake of reliability, often the force is too large, the result is that the blank tube is out of the chuck