Patent ID: 8356396
Filing Date: 2013-01-22
Classification: B66F,Y10T

Abstract:
1. A method for manufacturing a threaded tubular-member comprising the steps of: providing sheet stock having opposing first and second surfaces, opposing first and second edges, and an initial thickness; feeding the sheet stock through a tool comprising a coining tool to produce a threaded pattern, at least one forming tool for forming a tubular shape, and at least one restriking tool; coining a thread pattern onto said first surface of the sheet stock with said coining tool; stamping said sheet stock from a flat sheet into said tubular shape using said at least one forming tool so that said thread pattern on said first surface provides a substantially aligned thread pattern about an external circumference of said tubular shape; aligning said tubular shape in said restriking tool by aligning said thread pattern with a pattern of helical grooves on at least one surface of a die cavity; and compressing said tubular shape wherein the material thickness between said first and second surfaces is increased over said initial thickness of said sheet stock and said tubular shape's threaded pattern is forced against said pattern of helical grooves on said cavity causing said thread pattern to be more sharply defined.