GB190810045A - Improvements in or relating to Grinding Machines - Google Patents

Abstract

10,045. Fichtel & Sachs. May 21, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Producing curved surfaces; grooving. - In a machine for grinding surfaces to a circular arc of definite radius, more particularly for grinding grooves in steel races for ball bearings, the workholder support is made to oscillate continuously about a centre in front of a revolving grinding- wheel on a stationary support, the distance between the centre of oscillation and the circumference of the work being equal to the radius of the groove to be ground. The grinding-wheel a is mounted on a compound slide b, s on a pedestal p, and can be adjusted to compensate for wear. The workholder support h is mounted on a compound slide carried by a conical pin i, mounted in a suitable guide in the pedestal p. The pin i may be held positively in its socket or guide, but is preferably of such dimensions that it is held there by its own weight. The work-support h is oscillated about the pin i by hand or by a power-driven crankdisk t, having an adjustable arm and a connecting- rod m. The work d is mounted on a mandrel, driven by a pulley g through a suitable clutch and mounted between centres in the support h. When one piece of work is ground, the grinding-wheel a is withdrawn to allow another piece to be substituted, the adjustment of the work-support remaining unaltered. The machine may be arranged to grind internal grooves.