GB1394641A - Relief grinding machine for relief grinding and polygon grinding - Google Patents

Abstract

1394641 Grinding E JUNKER 28 Feb 1973 [1 March 1972] 9773/73 Heading B3D A relief grinding attachment for screw tap grinding machines or the like for relief grinding and polygon grinding comprises a spindle shaft 3 carrying a clamp for the workpiece, a cam system 12, 12a engaging a lever system 10 having a disc 4a in which the shaft 3 is eccentrically mounted, the disc being journalled to rotate about its centre 5. The grinding machine has a support adjustable in the direction of the arrows A and carrying the grinding wheel, the support being opposite a housing 2. The housing rotatably supports a shaft 4 in which is disposed the disc 4a, the shaft 3 carrying the clamp for the workpiece, being disposed for rotation about an axis eccentric to the axis 5 of the disc 4a. A gear segment 6 is secured to disc 4a and engages a worm 7 on a shaft 8 mounted in bearing 9 carried by the lever 10 which has a follower 11 disposed between cams 12, 12a. As the cams rotate, the lever is rocked and through the gear and segment rocks the disc 4a and the shaft 3 about the axis 5. With the shaft in the position shown, the movement of the shaft relative to the grinding wheel is a maximum. Adjustment of the disc by the worm to the position 3a reduces the movement to a minimum. The grinding wheel may be automatically adjusted by the same amount in the direction of the arrows A. Drive is transmitted to the shaft 3 from a spindle having a gear 22 formed with teeth 23 engaging the internal teeth 21 on a gear 20 mounted on the shaft 3.