Cold forming the inner surfaces of long-coiled tube stock - using high pressure oil to force tools through tube to avoid working length limitations

摘要

The process allows coiled tube to be worked by lubricating special stock tools and forcing them through the material by means of high pressure oil. A frame carries the coil of tube whose ends are attached to the machine. At the entry, conical drawing tools are fed from a magazine one or more at a time, into the tube and forced through to the outlet end, where they can be reclaimed and reused. The machine feed magazine is movable vertically and horizontally to adjust to the variable tube stock.