Extrusion cladding apparatus

Claim 1

AN EXTRUSION CLADDING APPARATUS FOR BONDING METAL IN THE SOLID STATE TO THE INSIDE SURFACE OF A PREFORMED METAL TUBE COMPRISING A BILLET CYLINDER ADAPTED TO HOLD A BILLET OF CLADDING METAL IN THE SOLID STATE, GUIDE MEANS PROVIDING A LINEAR PATH FOR AXIAL MOVEMENT OF SAID PERFORMED TUBE AROUND SAID CYLINDER, AN INSIDE DIAMETER DIE MEMBER FIXEDLY SECURED AGAINST AXIAL AND LATERAL MOVEMENT WITHIN THE CONFINES OF SUCH PATH AT THE DISCHARGE END OF SAID BILLER CYLINDER WHICH FORMS ONE SIDE OF AN ANNULAR RADIAL DISCHARGE ORIFICE OF FIXED PREDETERMINED CROSS SECTION FOR THE BILLET METAL FROM THE CYLINDER WITHIN SAID TUBE AS IT MOVES THROUGH SAID PATH, THE INSIDE OF SAID TUBE AS IT MOVES THROUGH SAID PATH COOPERTING WITH THE OUTER PERIPHERY OF SAID DIE MEMBER AND BEING SPACED THEREFORM TO DEFINE AN AXIAL EXTRUSION APERTUBE OF FIXED PREDETERMINED CORSS SECTION DOWNSTREAM RELATIVE TO SAID ORIFICE AND IN SERIES FLOW RELATIONSHIP THEREWITH, A POWER DRIVEN RAM TO APPLY EXTRUSION PRESSSURE TO THE BILLET OF METAL IN THE SOLID STATE CYLINDER FOR EXTRUDING SUCH METAL IN THE SOLID STATE THROUGH SAID DISCHARGE ORIFICE AGAINST THE PREFORMED TUBE AND THROUGH SAID EXTRUSION APERTURE, THE SIDES OF SAID ORIFICE BEING AXIALLY SPACED FROM EACH OTHER WHEREBY CLADDING METAL IN THE SOLID STATE RESPONSE TO THE EXTURSION PRESSURE APPLIED BY SAID RAM IS FORCED FROM THE BILLET AND RADIALLY DISCHARGED FROM SAID ORIFICE TOWARD AND AGAINST THE INSIDE OF SAID TUBE AND INTO INTIMATE CONTACT THEREWITH AND METALLURGICALLY BOUNDED THERETO AS THE TUBE MOVES PAST SAID ORIFICE, THE AXIAL SPACING OF THE SIDES OF SAID ORIFICE BEING GREATER THAN THE RADIAL DIMENSION OF SAID EXTRUSION APERTURE, SAID APPARATUS BEING CHARACTERIZED BY THE FACT THAT SAID PERFORMED TUBE MOVES AXIALLY THEREOF RELATIVE TO SAID ORIFICE AND DIE MEMBER DURING AN EXTRUSION CLADDING OF SAID TUBE AND FORMS A MOVING MANDREL FOR EXTRUDING CLADDING METAL OF A PREDETERMINED THICKNESS THEREWITH.