GB564113A - Internal keyway grinder - Google Patents

Abstract

564,113. Grinding internal keyways &c. CARROLL, G. B. March 9, 1943, No. 3819. [Class 60] A machine for grinding internal keyways, gears, &c. comprises a shaft with a grinding- wheel having its plane parallel to the shaft which is mounted in, and rotates with, a rotatable control head, means being provided for adjusting the shaft laterally with respect-to the head in two directions at right angles.. The grinding-wheel 54, Fig. 11, is carried on a shaft 53 rigidly connected with a box-like member 47 which slides in a second similar member 44 sliding in a square hole in the control head 32. The member 47 engages the member 44 by inclined keyways 48, Fig. 11, on the vertical faces, and the member 44 engages the head 32 by inclined horizontal keyways 46, whereby longitudinal movement of these members effects their transverse adjustment. The members are provided with flanges 45, 49 engaged by forked operating members 76, 91, the flange 49 also moving between a pair of adjustable stops 96, 97. The members 91 are formed on a sliding member 88 operated periodically by hydraulic cylinders 92. The fork 76 is formed on a screwed rod 73 fed by a nut 84, Fig. 8, which can be rotated, for setting, by a hand wheel 81, and for feed by a ratchet 83. The stop members 96, 97.are carried by separate rods 98, 99 engaged by oppositely inclined bars 101 on a frame 103 which is moved by a screwed rod 105 engaged by a ratchet-operated nut 110 for feeding, and operated for setting by a hand wheel 105<1>. The parts of the keyway are operated in the sequence a, b, c, d, Fig. 10, the shaft being turned through 180 degrees between the corners a and b, and back again between c and d. This motion is effected by a rack 35, Fig. 15, operated hydraulically and engaging teeth on the control head 32 which rotates between circumferential stops. The rack is provided with projections 87, 115 by which the pawls are operated to effect the feeding movements of the rod 73 and the two rods 98, 99 respectively, at the end of each upward movement. The grinding-wheel is mounted on a transverse spindle 62 and is driven from a motor 66 by a belt passing through the shaft. The work, shown as a pump barrel 126, Fig. 4, is clamped on a V-block 118 secured to a slide 22 which is reciprocated on a bed 21. The barrel is correctly positioned by engaging the horizontal edge of a setting member 133 with blocks 130 temporarily placed in bores in the barrel.