GB1354879A - Grinding wheel dressing apparatus - Google Patents

Abstract

1354879 Tracing grinding wheels A A JONES & SHIPMAN Ltd and J HOULDSWORTH 14 Sept 1971 [15 Sept 1970] 43894/70 Heading B3D A device for adjusting a grinding wheel dressing tool unit 2 of a dressing apparatus in which the tool swivels about an axis, comprises means 57, Fig. 6, for supporting the unit, and an optical instrument 61 through which the cutting tip 1, or an image of the tip, can be viewed, the instrument having a sighting mark which represents the axis of tool rotation of the dressing apparatus, and the support being positioned relative to the instrument to simulate the position the tool unit occupies relative to the axis in the apparatus so that, viewed in the instrument, movement of the tool 1 relative to the sighting mark corresponds to movement of the tool relative to the axis of rotation in the dressing apparatus. In the dressing apparatus, the tool 1, such as a radiused diamond tip is mounted in a holder 2 axially adjustable by a screw (not shown) on a carrier 15 which, in turn, is adjustable transversely of the axis of the holder to a piston determined by abutment of an adjustable screw 30 or wedge 36 with a stop 32 on the arm 10 of a pantograph wheel dressing apparatus 13, the arm swivelling about a shank 11. To set the axial position of the holder 2 in the carrier and the adjustable screw 30 or wedge 36, the carrier can be removed from the arm 10 by release of a screw 23, and secured by a screw 23<SP>1</SP>, Fig. 6, to a pedestal 57 adjacent a pedestal 62 supporting the optical instrument which has a sighting mark preferably in the form of concentric rings, the screw 30 or wedge 36 abutting a stop 32<SP>1</SP>. The pedestals are adjusted so that the relative positions of the axis of the optical instrument and the surfaces 65, 66 of the pedestal 57 which engage the carrier are the same as the axis of the shank 11 if the wheel dressing apparatus and the surfaces engaged by the carrier on the arm 10. The cutting tip is then adjusted by axial movement of the holder in the carrier in one direction, and the carrier adjusted in a second direction at right angles to the frit by adjustment of the screw 30 or wedge 36 against the stop 32<SP>1</SP>. With the position of the pedestals set, other carriers can be mounted on the pedestals and adjusted so that their cutting tips are in the correct position when the carriers are mounted on the arm 60.