Apparatus and method for drawing metal tube

Abstract

In an apparatus for drawing a metal tube, in which a lubricant is discharged from an opening formed in a hollow rod which supports a plug to apply the lubricant onto an inner surface of a tube blank, the lubricant discharging sensitivity when a discontinuous lubricant supply is performed is enhanced. In a drawing apparatus in which a metal tube blank (2) is machined by passing the same between a die (10) for forming an outer surface and a plug (11) for forming an inner surface, a discharge port (21) from which a lubricant (L) is discharged opens onto an outer peripheral surface of a hollow rod (20) which supports the plug (11). The discharge port (21) is provided only in an area of the rod (20) higher than the center thereof in the upward and downward directions.

Description

technical field [0001] The present invention relates to a drawing device and use of a metal tube capable of producing a drawn tube made of metal, such as a substrate for an OPC photosensitive drum of electrophotographic equipment such as a copier, a laser printer, and a facsimile, and having excellent dimensional accuracy. The drawing method of the drawing device. In addition, in the description of this specification, the "rear" of the drawing device and the drawing method means the direction relative to the shell side of the drawn pipe, and the "front" means the direction of the drawn pipe relative to the shell (capillary, plain pipe). direction of the tube side. Background technique [0002] In recent years, as substrates for photosensitive drums of OPCs in electrophotographic equipment such as printers, laser printers, and facsimile machines, non-cut tubes suitable for mass production are often used. [0003] As one of the non-cutting tubes, there is an ED tube that is ...

AI Technical Summary

Problems solved by technology

Therefore, for the outer surface that can be supplied with lubricating oil at any time, the inner surface sometimes has insufficient lubricating oil during drawing and sintering occurs, which reduces the deflection accuracy of the drawn tube.

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