Metal deforming – By extruding through orifice – Expressing non-uniform cross-section or non-linear product
Reexamination Certificate
2006-07-04
2006-07-04
Tolan, Ed (Department: 3725)
Metal deforming
By extruding through orifice
Expressing non-uniform cross-section or non-linear product
C072S259000, C072S264000, C072S272000, C072S370010
Reexamination Certificate
active
07069760
ABSTRACT:
The purpose of the present invention is to propose a new way of manufacturing curved metal tubes or rods with arbitrary sections and eliminating the conventional bending defects such as thinning and thickening in the wall of tube, distortion of the section, and wrinkling and folding on the surface by the extrusion bending process that can extrude and weld together one or more billets inside dies cavity, and can bend them during extrusion due to the gradient of extrusion velocities controlled by the eccentricity of the cavity sections between the entrance and the exit of the eccentric conical extrusion bending dies and conical plug, or by the relative size of the holes of multi-hole container, or by the relative moving velocity of multi-punches.
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Blakely & Sokoloff, Taylor & Zafman
De Klerk Stephen M.
Jin In Tai
Pukyong National University
Tolan Ed
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