Abstract A method and apparatus for processing workpieces in the form of bar stock or the like prior to the drawing of said pieces through a reducing die. The method includes the steps of joining the workpieces together by welding to produce a welded joint, and then reducing the effective diameter of said joint by the application of a tensile stress thereto so that said welded joining may be drawn through a die without damaging said die. The step of reducing the effective diameter of said joint includes further the partial dressing of said joint by engaging the upset formed upon welding with a shear blade to sever portion thereof from the joint. The apparatus of the present invention include a pair of welding clamps for engaging said workpieces, one said clamp being movable relative to the other, for effecting both the upset weld and applying the tensile stress to the resulting welded joint. Said movable clamp has a shear blade formed thereon for partially dressing said joint.
Inventors
👤 Raymond L Valente
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 13:02
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
179 words
A method of processing two workpieces to be joined prior to the sequential drawing of each through a die, said method comprising the steps of: gripping each workpiece with a separate clamp member one of which includes a shear blade and butting the ends of the respective workpieces together; heating the butted ends of the workpieces until a plastic state is reached; applying pressure to said heated ends by relative movement of the clamp members to upset the ends of the respective workpieces a sufficient amount to produce a solidly fused joint; releasing said one clamp member having the shear blade after forming of said joint and moving said clamp member axially to cause said shear blade to engage the upset portion of the joint and sever a segment therefrom; retracting and reengaging said clamp member carrying the shear blade; and affecting relative retractive movement of said clamp members thereby applying a tensile stress to the joint to as to cause said joint to neck down, such that said joint may be drawn through a die without damage thereto.
Claim 2
Independent Claim
179 words
A method of processing two workpieces to be joined prior to the sequential drawing of each through a die, said method comprising the steps of: gripping each workpiece with a separate clamp member one of which includes a shear blade and butting the ends of the respective workpieces together; heating the butted ends of the workpieces until a plastic state is reached; applying pressure to said heated ends by relative movement of the clamp members to upset the ends of the respective workpieces a sufficient amount to produce a solidly fused joint; releasing said one clamp member having the shear blade after forming of said joint and moving said clamp member axially to cause said shear blade to engage the upset portion of the joint and sever a segment therefrom; retracting and reengaging said clamp member carrying the shear blade; and affecting relative retractive movement of said clamp members thereby applying a tensile stress to the joint to as to cause said joint to neck down, such that said joint may be drawn through a die without damage thereto.
Claim 3
Dependent Claim
25 words
A method as defined in claim 1 further including the step of applying heat to said joint prior to the application of tensile stress thereto.