Patent GB-493949-A (GB)
Title: Improvements in or relating to the grinding or honing of internal cylindrical surfaces
IPC: B24B33/02
Filed: 1937-04-20
Abstract: 493,949. Honing cylinders. MICROMATIC HONE CORPORATION. April 20, 1937, No. 11276. Convention date, Dec. 19, 1936. [Class 60] A machine for honing internal cylindrical surfaces has the hone carried. by a shaft which is rotated and reciprocated, means being provided for adjusting the ratio of the reciprocations to the rotations of the tool, and also if desired the extent of the reciprocation. Means also are provided for additionally reciprocating the work manually and also for stopping the rotation of the hone and simultaneously effecting its collapse to permit removal of the work. The machine comprises a base 11 carrying a motor 12 and having thereon aligned bosses 14, 15 for supporting the honing-device. In the boss 15, Fig. 4, is journalled a shaft 17 carrying a pulley 21 driven by a belt 51 and pulley 52 from the motor 12, and pressed to the right by a spring 28 and a thrust bearing 26. The shaft 17 has an end portion 31 running in roller bearings 32 in a sleeve 33 carried by the boss 14, and mounted on the boss, on roller bearings 37, is a pulley 39 also driven by a belt 54 and pulley 55 by the motor 12. The pulley 39 has in its face a sloping recess 41 in which is mounted a thrust bearing 42, the outer race of which has an aperture 48 engaged by a finger 45 carried by the pulley 2 so that, according to the relative speeds of the pulleys 21,39 the shaft 17 may be given any desired number of rotations for each reciprocation thereof. The inclination of the bearing 42 may be adjusted by screws so as to vary the extent of reciprocation of the shaft 17. The shaft 17 has lubrication grooves 19 therein fed from a reservoir 55 in the boss 15 by a ring 58. The left-hand end of the shaft 17 carries a collar 61 abutting against the end of a hollow spindle 63 within which is slidably mounted a tool spindle 65 carrying a pin 67 projecting through a slot 66 in the spindle 63, and engaging a sleeve 68, a spring 69 being located between enlargements on the spindle 63 and sleeve 68. Surrounding the spindle 63 is a housing 71 having a flange secured to a flange 73 on the boss 15, and mounted by a thrust bearing on the collar 61 is a ring 77 having cam surfaces 79 therein, engaged by similar cam surfaces on a ring 87 carried by a sleeve 83 mounted by ball bearings on a sleeve 81 slidable on the spindle 63, and on the sleeve 83 is a nut 76, retained by a ball catch 88. The sleeve 81 carries a pin 89 passing through slots 91 in spindle 63 and engaging a nut 92 on a plunger 93 having thereon a head 94 and carrying a slidable sleeve 96, a spring 98 lying between a nut 95 and a flange 97 on the sleeve. Manual adjustment of the nut 76 adjusts the position of the spindle 65 relative to the spindle 63 to take up wear of the honing elements. The ring 97 is connected by a lug 98a and a link 99 to one arm of a bell-crank lever 102 carried by a shaft 103, and when the lever is moved in one direction the cam surfaces 79 serve to move the ring 87, whereby the spindle 65 is moved forwards. The honing tool comprises abrading elements 113 secured to carriers 107 engaging tapers in the slots 108 in the spindle 65 ; the carriers 107 have projections 109 secured to the end of the spindle 63 by a cap 111 screwed on the part 64 thereof. The housing 71 slidably carries two connected sleeves 116, 118 acted on by a spring 121, the sleeve 116 also carrying a cap nut 117 and a pin 126, movement of the sleeves being limited by nuts 125 on a screwed rod 123 ; the work piece 131 being honed is pressed against the nut 117 and reciprocated to the extent limited by the nuts 125. Water is supplied to the tool by a tube 128 passing to the interior of the sleeve 116. The starting and stopping of the tool is controlled by clutch and brake mechanism comprising a friction clutch plate 134 on the shaft of the motor 12, the plate having a projection with oil grooves therein, to receive a sleeve 137 carrying the pulleys 52, 55, and having at its end a spring-pressed ball 141 adapted to be engaged by a cam surface 142 on a lever 143 carried by the shaft 103 ; the lever also carries a brake surface 144, to engage the hub 38 of pulley 39. The shaft 103 is moved by a treadle &c. so that when the pulley 52 is moved against the clutch plate 134 the brake 144 is moved from the hub 38 and vice versa, whilst at the same time the ring 77 is moved to cause the hone to expand or collapse.