In tubing and casing finishing production line, the CNC lathe can be considered as the key machine for the quality and efficiency of tubing and casing production line.
One of a famous brand of CNC machine in OCTG industry, is PMC-Colinet. The advantage of this CNC machine, is they are familiar with the OCTG industry, there are many detailed designs that are suitable for OCTG workshop production. For example, in order to avoid cutting-liquid getting inside of steel pipe and give steel pipe an inner support strength during outer surface of steel pipe end get cutting, a hydraulic expander device is used, looks like a plug, insert into steel pipe before cutting; and a stopper block is installed inside of CNC machine to make sure the steel pipe stop at the very precision position before cutting-tools moving.
The disadvantage of them, is the price is too high, and not an economic solution. Some project designer considers a method to have these devices equipped as additional part in other brand of CNC machine such as Danobat, Okuma, Mori Seiki and so on.
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