continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6475/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :24/07/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "METHOD FOR RELIEF GRINDING THE CUTTING TEETH OF TAPS, THEAD FORMERS, AND
SIMILAR, TOOLS, AND GRINDING MACHINE FOR PERFORMING SAID METHOD"
(51) International classification :B24B 3/22 (71)Name of Applicant :
(31) Priority Document No :10 2006 009 986.9 1)ERWIN JUNKER MASCHINENFABRIK GMBH
(32) Priority Date :03/03/2006
Address of Applicant :JINKERSTRASSE 2, 77787,
(33) Name of priority country :Germany
NORDARCH, GERMANY Germany
(86) International Application No :PCT/EP2007/001728 (72)Name of Inventor :
Filing Date
:28/02/2007
1)ERWIN JUNKER
(87) International Publication No :WO 2007/101593
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
In prior art,radial inwardis performed in accordance with a rotating cam disk is imparted on the grinding disk in order to relief-grind
the cutting teeth and the chamfer of taps and the cutting teeth of thread formers. The invention relates to a cam disk (11) which can be
rotated about an axis A and is provided with a control cam (12). Said control cam (12) forms a group of curves according to a large
number of possible undercut contours on the grinding teeth of the tap or thread former, which are to be relief-ground. In order to
obtain a specific undercut contour on a cutting tooth, a limited angle of rotation a is selected from the control cam (12). Said area is
mechanically, optically, or electronically scanned by means of a scanning device (13). To this avail, the cam disk (11) performs an
oscillating rotary movement only above the selected section of the control cam (12) (arrow indicating the direction of rotation 15).
Relief-grinding of the cutting tooth is completed once a fore-and-aft movement has been performed, and the grinding disk returns to
the starting position thereof. The result of the scan is transmitted to an electronic control device via a signal line (14).
No. of Pages : 15 No. of Claims : 6
The Patent Office Journal 24/10/2008 25943