Apparatus and process for forced lubrication piercing
OwnerFrancis J. Fuchs, Jr.inventor
Life of this patent
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Abstract
Pressurized fluid, pressurized in excess of the yield strength of a billet or rod, is communicated to the exterior of a piercing punch during piercing of the billet or rod to produce tubing, the pressurized fluid is provided to the exterior of the piercing punch during piercing to provide forced lubrication between the piercing punch and the billet or rod to reduce friction therebetween; such communication of pressurized fluid is also for causing self-centering of the piercing punch with respect to the billet or rod during piercing to produce tubing of uniform wall thickness.
Claims18
Forced lubrication piercing apparatus for producing tubing from a billet or rod, comprising:
- fluid supply means for supplying pressurized fluid pressurized in excess of the yield strength of said billet or rod;
- a piercing punch for engaging and piercing said billet or rod to produce said tubing, said piercing punch provided with a passageway for communicating said pressurized fluid to the exterior of said piercing punch to provide forced lubrication between said piercing punch and said billet or rod during piercing;
- and
- advancing means for producing relative motion towards each other between said piercing punch and said rod or billet to cause said piercing punch to engage and pierce said billet or rod.
Forced lubrication piercing process for producing tubing from a billet or rod, comprising the steps of:
- supplying pressurized fluid pressurized in excess of the yield strength of said billet or rod;
- producing relative motion towards each other between a piercing punch and said rod or billet to cause said piercing punch to engage and pierce said billet or rod and produce said tubing;
- and
- communicating said pressurized fluid to the exterior of said piercing punch to provide forced lubrication between said piercing punch and said billet or rod during piercing.
Dependencies are inferred from the claim text.