APPARATUS AND METHOD FOR DRAWING METAL TUBE
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Accused Products
Abstract
In an apparatus for drawing a metal tube in which lubrication oil is ejected from an ejecting opening formed in a hollow rod supporting a plug to apply the lubrication oil onto an inner surface of a raw tube, the lubrication oil ejection responsiveness when a discontinuous lubrication oil supply is performed is enhanced. In the drawing apparatus in which a metal raw tube (2) is processed by passing the same between a die (10) for forming an outer surface and a plug (11) for forming an inner surface, an ejecting opening (21) from which lubrication oil (L) is ejected opens into an outer peripheral surface of a hollow rod (20) supporting the plug (11). The ejecting opening (21) is provided only in a region of the rod (20) higher than the center thereof in the up-and-down direction.
2 Citations
21 Claims
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1-10. -10. (canceled)
- 11. A drawing apparatus for a metal tube for processing a metal raw tube by passing a metal raw tube between a die for forming an outer surface and a plug for forming an inner surface, characterized in that an ejecting opening for ejecting lubrication oil opens into an outer peripheral surface of a hollow rod supporting the plug, wherein the ejecting opening is provided only at a region above a center of the rod in an up-and-down direction.
Specification