GB1443020A - Control device for fine machining - Google Patents

Abstract

1443020 Grinding SKF INDUSTRIAL TRADING & DEVELOPMENT CO BV 12 Dec 1973 [13 Dec 1972] 57588/73 Heading B3D A device for controlling the fine machining operation of the end face 5 of rolling bearing races 1 clamped on a rotating table 2 comprises a guide member 3 which bears in the raceway 4 of the race and is mounted on an arm 7 axially movable with respect to the race, and a probe 6 which bears on the end face 5 to be ground and is mounted on an arm 11 also axially movable and in operative connection via a measuring member 10 with the member 3. The bearing race 1 is held magnetically or otherwise on the rotating table 2 and its raceway 4 is engaged by the member 3 which may be cylindrical, partconical or spherical. The member is carried by the arm 7 which is secured to a link 9 supported by parallel springs 8 from a plate 15. The probe 6 engages the end face of the race and is carried by an arm 11 secured by a link 14 to a pair of parallel springs 12 also on the plate 15. The probe 10 is pneumatic, mechanical or inductive and is mounted in one of the links and cooperates with a baffle in the form of an adjustable screw 13 in the other link. An adjusting device 21 is associated with each of the spring arrangements to vary the measuring force and axial movement of each of the arms 7, 11 is limited by screws 26 co-operating with grooves in the links. The arm 7 is supported by a spring joint 28 so that the member 3 can be withdrawn from the raceway 4 upon operation of a cylinder 28. A cylinder 17 is connected by a rod 16 to plate 15 to axially position the measuring device. After the race is clamped to the table 2, the cylinder 17 moves the plate to align the member 3 with the raceway, a limit switch then actuating cylinder 29 so that the member is urged by spring 28 into engagement with the raceway, the spring 8 permitting accurate alignment and positioning the member 10 according to the position of the raceway. The probe 6 engages the end face 5 to be ground and grinding is monitored by the tracer to have different feeds until the final distance a is sensed by the probe 10. The end face is thus ground parallel to the centre of the raceway, any offset being eliminated.