Patent ID: 6572447
Filing Date: 2003-06-03
Classification: B21D,E21B,Y10T

Abstract:
A method forming a base body for a diamond bit, the base body having a tubular carrier body (2, 12) having a bottom (4), and a shank (1, 11) projecting from the bottom (4), the method comprising the steps of providing a blank having a carrier body portion (2â€²) having opposite end surfaces, and a shank portion (1â€²) projecting from one of the opposite end surfaces of the carrier body portion; placing the blank in a spinning machine-tool, with the shank portion being secured in a main spindle of the spinning machine-tool; pressing a mandrel against another of the opposite end surfaces of the carrier body portion; and forming the tubular carrier body (2,12), together with the bottom (4) by subjecting the carrier body portion (2â€²) of the blank to a spinning process.