Method and apparatus for grinding the end of a tubular workpiece

(19)

(11)

EP 0 509 665 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	03.03.1993 Bulletin 1993/09

(43)	Date of publication A2:
	21.10.1992 Bulletin 1992/43

(21)	Application number: 92302772.6

(22)	Date of filing: 30.03.1992

(51)	International Patent Classification (IPC)⁵: B24B 7/04, B24B 9/00

(84)	Designated Contracting States:
	DE ES FR IT

(30)

Priority:

15.04.1991 US 684824

(71)	Applicant: AMSTED Industries Incorporated
	Chicago Illinois 60601 (US)

(72)	Inventors:
	TAYLOR, Calvin, H. Cottondale, AL 35453 (US) SIERADZKI, Christopher Z. Homewood, IL 60430 (US)

(74)	Representative: Davies, Christopher Robert
	Frank B. Dehn & Co. Imperial House 15-19 Kingsway London WC2B 6UZ London WC2B 6UZ (GB)

(56)

References cited: :

(54)	Method and apparatus for grinding the end of a tubular workpiece

(57) In a grinding apparatus, an end of a tubular workpiece (10) is finished, preferably with a chamfer, by grinding while the workpiece is positioned in a holder (14) and rotated about the workpiece axis. A rotatable grinder (22) is carried by a carriage (90) that pivots the grinder in a plane that is radial to the axis whereby the grinder is moved between operative and inoperative positions. In a preferred arrangement, the grinder (22) is lowered into engagement with the workpiece by an actuator (180) acting against a constant upward biasing force.

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