Ring tool unit, method for manufacturing the same, sleeve, and mandrel
AssigneeNakata Manufacturing Co., Ltd.
InventorsFeizhou WANG, Takeyuki SATO, Mitsuru NAKATA, Tomoyasu NAKANO, Takamitsu MIURA
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Abstract
An object is to prolong the life of a ring tool, and improve the productivity of a welded pipe. A ring tool unit is held in a downstream-side end portion of a mandrel to be inserted into a welded pipe currently being manufactured from the upstream side of a welding position, and is used as a cutting tool for continuously cutting a bead produced on the inner surface of the welded pipe, wherein the ring tool unit is formed by fitting a ring tool having a ring-like blade in a sleeve having a circular hole for holding the outer circumference of the ring tool.
Claims7
A ring tool unit that is held in a downstream-side end portion of a mandrel to be inserted into a welded pipe currently being manufactured from an upstream side of a welding position, and is used as a cutting tool for cutting a bead produced on an inner surface of the welded pipe,
- wherein the ring tool unit is formed by fitting a ring tool having a ring-like blade in a sleeve having a circular hole for holding an outer circumference of said ring tool.
Dependencies are inferred from the claim text.