Method for extrusion
OwnerAlfred R. Austeninventor
Life of this patent
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Abstract
Die arrangement for use with conventional and hydrostatic extrusion presses consisting of a first die for providing a first extruded section of a billet and a second die cooperating with the first die to further extrude said first extruded section to final shape. Successive dies beyond the second die are contemplated to provide successive step-wise extrusion for greater reductions, especially of large billets. The method of the invention comprises step-wise incremental sequential extrusion of the billet and extruded portions of the billet until the final shape is achieved.
Claims12
A method for hydrostatic extrusion of a billet including the steps of:
- extruding a portion of the billet through a first die ths forming a primary extrusion section of the billet;
- stopping said primary extrusion followed by extruding the primary extrusion section through a secondary die, thus forming a secondary extrusion defining said desired size and shape of the finished extrusion;
- stopping said secondary extrusion which simultaneously initiating extrusion of the billet to form a second primary extrustion section;
- and
- alternately extruding said billet and said primary extrusion sections until said billet is extruded to the desired corss-section dize, shape, and length.
A method of extruding a billet including the steps of:
- hydrostatically extruding a portion of the billet through a first die thus forming a primary extrusion section of the billet;
- stopping said primary extrusion followed by extruding the primary extrusion section through a secondary die by conventional extrusion means, thus forming a secondary extrusion defining the desired size and shape of the finished extrusion;
- stopping said secondary extrusion while simultaneously initiating extrusion of the billet to form a secondary primary extrusion section;
- and
- alternately extruding said billet and said primary extrusion sections until said billet is extruded to the desired cross-section size, shape, and length.
A method of extruding a billet including the steps of:
- extruding a portion of the billet through a first die by conventional means thus forming a primary extrusion section of the billet;
- stopping said primary extrusion followed by hydrostatically extruding the primary extrusion section through a secondary die, thus forming a secondary extrusion defining the desired size and shape of the finished extrusion;
- stopping said secondary extrusion while simultaneously initiating extrusion of the billet to form a secondary primary extrusion section;
- and
- alternately extruding said billet and said primary extrusion sections until said billet is extruded to the desired cross-section size, shape, and length.
A method of extruding a billet including the steps of:
- hydrostatically extruding a portion of the billet through a first die thus forming a primary extrusion section of the billet;
- stopping said primary extrusion followed by hydrostatically extruding the primary extrusion section through a secondary die thus forming a secondary extrusion defining the desired size and shape of the finished extrusion;
- stopping said secondary extrusion while simultaneously initiating extrusion of the billet to form a secondary primary extrusion section;
- and
- alternately extruding said billet and said primary extrusion sections until said billet is extruded to the desired cross-section size, shape, and length.
Dependencies are inferred from the claim text.