GB767175A - Machine for grinding profiled bodies - Google Patents

Abstract

767,175. Grinding machines. INDUSTRIAL DISTRIBUTORS (SALES), Ltd. May 19, 1954 [May 19, 1953], No. 13987/53. Class 60 A grinding machine for the generation of profiled bodies has a work-piece holder W arranged for oscillating movement around a spindle 20 which can be adjusted to a compound angle to the axis of the grinding wheel 1. The work-piece 9, such as a diamond is fixed to the end of a holder 10 lengthwise and angularly adjustable in a clamp 11 between jaws 12, 13 secured by a screw 14, the adjustment being facilitated by a cam and stop device 15. The clamp 11 is mounted on a dovetail slide 16 in a frame 17 to permit lateral adjustment of the axis of the holder 10 by turning screw 18 and is also adjustable at right angles to the lateral movement on a pair of parallel bars 19. The position of the spindle 20 with respect to the grinding wheel axis may be varied by turning the screw. 29 to swing a bracket 27 around a spindle 28, the arrangement of the bracket allowing the spindle 20 to be positioned above or below the face of the grinding wheel. 1. A support 32 for the screw 29 and a bearing block 33 for the spindle 28 are arranged on a slide 34 adapted to be adjusted by a hand wheel 36 and a slide 37 adapted to be adjusted by a hand wheel 38 across the bed B of the machine. The grinding wheel 1 is mounted in a bearing 3 which is vertically adjustable on a column 4 by a screw 5 and is secured by a clamping device 7, the wheel 1 being rotated by a belt drive to a pulley 8. The wheel spindle may be eccentrically mounted in the bearing 3 in order to impart a gyratory motion to the grinding wheel 1. The frame 17 is oscillated at a constant uniform angular velocity by a rotating spindle 40, Fig. 8, to which it is connected by links 42, 43 and a crank 41, an intermediate lever 44 oscillating around a pivot 45. To ensure that a particular crystal plane of the diamond can be attacked from all directions, the travel of the slides 34 and 37 is chosen so that more than a quarter of the plane wheel surface can be covered. A peripheral wheel may be used in place of the wheel shown and both wheels may be mounted on the same holder. Alternatively, two cup shape wheels for rough and fine grinding may be mounted in a similar manner. The machine may be used for producing shaped diamond tips for turning tools, pyramids, such as that used for Vickers hardness testing and conical, cylindrical or spherical surfaces and their combinations. Specification 651,800 [Group XIX] is referred to.