The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2007
Filed:
May. 04, 2005
Jörgen Kugelberg, Huddinge, SE;
Roine Ericsson, Huddinge, SE;
Jonathan Fair, Coventry, GB;
Anders Micski, Huddinge, SE;
Jörgen Kugelberg, Huddinge, SE;
Roine Ericsson, Huddinge, SE;
Jonathan Fair, Coventry, GB;
Anders Micski, Huddinge, SE;
Sandvik Intellectual Property AB, Sandviken, SE;
Abstract
The present invention relates to a method for manufacturing a drill blank or a mill blank by extrusion, said method comprising the forming of a first blank portion (B) having external, axially extending external flutes and the forming of a further blank portion (B) in the shape of a shaft. The invention also relates to a device for manufacturing a drill blank or a mill blank. The method according to the invention is characterised by: extruding a first blank portion (B) having a free end and external flutes; allowing the extrusion to continue to supply further extruding mass into a cavity (), said supply of extruding mass completely filling out the external flutes of the first blank portion (B) to produce a second blank portion (B) integral with the first blank portion (B); allowing the extrusion to continue to produce a desired length of the first blank portion (B); and cutting off the first blank portion (B) at the end facing away from the second blank portion (B).