Mandrel holding and releasing means
First Claim
Patent Images
1. A mandrel-mandrel rod assembly for a seamless tube piercing mill or the like comprising:
- a mandrel rod having a hollow end at its mandrel end,a mandrel having an internal central opening extending from the rear toward the front and forming a rear surface,an intermediate piece mounted on said mandrel rod at its mandrel end,said intermediate piece including a centrally located projection at its mandrel end having surfaces for entering said opening of said mandrel to mount said mandrel on said intermediate piece,a surface on said intermediate piece for contacting said rear surface of said mandrel,first resilient energy exerting means mounted within said intermediate piece in a manner to allow relative movement therebetween and extending into said opening of said mandrel,second resilient energy exerting means associated with said first resilient means constructed and arranged in a manner to allow relative movement between said first resilient means and said intermediate piece assembly upon contact of said first resilient means with said mandrel, whereby said first resilient means automatically assumes a mandrel holding position and a mandrel releasing position on relative movement of said intermediate piece and said mandrel, andsaid first resilient means constructed and arranged within said intermediate piece and said mandrel in a manner that during said holding and releasing positions said first resilient means remains within a circumference formed inward of said projection of said intermediate piece.
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Accused Products
Abstract
An arrangement for securing and easily releasing a mandrel from a mandrel rod upon their advancement and return movements during the piercing operation of a seamless tube. Between the mandrel and rod is an intermediate piece having one or more openings for receiving a hook with a nose extending into an opening of the mandrel. The hook is biased into position by a spring mounted around its one end and at its other end beneath a nose is a tapered surface for contacting a corresponding surface of the mandrel to pivot the hook away from the interior of the mandrel to release the mandrel from the intermediate piece and mandrel rod.
8 Citations
7 Claims
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1. A mandrel-mandrel rod assembly for a seamless tube piercing mill or the like comprising:
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a mandrel rod having a hollow end at its mandrel end, a mandrel having an internal central opening extending from the rear toward the front and forming a rear surface, an intermediate piece mounted on said mandrel rod at its mandrel end, said intermediate piece including a centrally located projection at its mandrel end having surfaces for entering said opening of said mandrel to mount said mandrel on said intermediate piece, a surface on said intermediate piece for contacting said rear surface of said mandrel, first resilient energy exerting means mounted within said intermediate piece in a manner to allow relative movement therebetween and extending into said opening of said mandrel, second resilient energy exerting means associated with said first resilient means constructed and arranged in a manner to allow relative movement between said first resilient means and said intermediate piece assembly upon contact of said first resilient means with said mandrel, whereby said first resilient means automatically assumes a mandrel holding position and a mandrel releasing position on relative movement of said intermediate piece and said mandrel, and said first resilient means constructed and arranged within said intermediate piece and said mandrel in a manner that during said holding and releasing positions said first resilient means remains within a circumference formed inward of said projection of said intermediate piece. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification