Induction heated pressure welding
AssigneeFMC Corporation
InventorCharles A. Brolin
Life of this patent
Estimating the term…
Abstract
A method and apparatus is provided for first heating surfaces to be welded together by one or two induction coils placed therebetween and upon raising both surfaces to a forging temperature forcing said surfaces together with sufficient force to weld the surfaces together. The heating and upsetting steps occur when the surfaces are in a substantially inert atmosphere.
Claims30
A method of welding two weldable surfaces together comprising the steps of:
- supporting each surface with said surfaces spaced from each other;
- positioning an induction heating means between said weldable surfaces;
- passing an alternating current through said induction heating means to induction heat each weldable surface to bonding temperature;
- removing said induction heating means from between said surfaces;
- and
- immediately forcing said heated surfaces together with sufficient force to only upset the heated portions of said weldable surfaces for welding said surfaces together.
A method of induction welding the weldable surfaces of two members together using an induction coil, said method comprising the steps of:
- supporting the two members with the faces spaced apart to form a gap;
- moving the induction coil within said gap;
- providing a substantially inert atmosphere around said faces;
- passing a high frequency current through the coil to heat said faces;
- removing the coil from said gap when said members are heated to appropriate temperatures;
- and
- upsetting said faces into welding engagement with each other.
An apparatus for welding two weldable surfaces together, comprising:
- means for supporting each surface with said surfaces spaced from each other;
- induction heating means for heating each surface to an upsetting temperature;
- means for establishing relative movement between said induction heating means and said weldable surfaces for selectively positioning said surfaces and said induction heating means between a surface heating position and a position remote from said surface;
- means for activating said induction heating means for heating each weldable surface to a welding temperature when in said surface heating position;
- and
- means for forcing said heated surfaces together with sufficient force to upset portions of said surfaces to weld said surfaces together when said heating means are in said remote position.
An apparatus for welding two members together with each member having a weldable surface, comprising:
- means for supporting each member with said surfaces spaced from each other;
- induction heating means for heating each surface to an upsetting temperature;
- means for moving said induction coil means between a position heating said weldable surfaces to an upsetting temperature and a second position remote from said welding surfaces;
- and
- means for forcing said heated surfaces together with sufficient force to upset portions of said heated weldable surfaces to weld said members together.
An apparatus for induction heating and pressure welding weldable surfaces of two members together when disposed within a substantially oxygen free atmosphere, comprising:
- first support means for supporting one of said members;
- second support means for supporting the other member with said weldable surfaces being spaced from each other;
- an induction coil;
- means for establishing relative movement between said coil and said weldable surfaces for selectively positioning said coil and said weldable surfaces in a heating position in alignment with each other and in a welding position out of alignment with each other;
- means for directing a high frequency current through said coil when in said heating position to heat said surfaces to an upsetting temperatures;
- and
- pressure applying means for moving the heated surfaces together with sufficient force to upset said surfaces and weld said members together when said coil is in said welding position.
Dependencies are inferred from the claim text.