Patent GB-552071-A (GB)
Title: Improvements in or relating to abrading tools
IPC: B24B33/08
Filed: 1941-12-15
Abstract: 552,071. Honing &c. tools. MICROMATIC HONE CORPORATION. Dec. 15, 1941, No. 16165. Convention date, Dec. 13, 1940. [Class 60] A honing &c. tool for the inner wall of a tube of considerable length comprises a tool body with annularly-disposed abrasive elements, adjacent sets being relatively offset, and with guiding elements to align the body with the axis of the bore, a number of separable tubular sections fitted with similar guides and connected by universal couplings, and an adjusting member by means of which a central actuating member passing through the tubular sections to the tool body is moved longitudinally relatively thereto to effect a preliminary radial adjustment of the abrasive elements. In Fig. 5, which shows a part of the tool body, the stones 26, mounted on axially movable shoes 27, are disposed in slots 25 in the body 14. The stones are adhesively secured to metal backings 28 having projections 32 engaged by springs 33. The shoes engage arcuate cam portions 38 on plates 37 having spaced knife edges 41 engaged by the conical surfaces 42 on the adjusting member 22. The guiding element comprises a ring 45 rotating on the body 14 between washers 46 and carrying the bore-engaging elements 43 which are fitted with cork bases 48 and are retained by garter springs 53. The tool body is fitted with a guide at each end and with a number of sets of abrasive elements. It is connected to a tubular section by a universal joint 15, Fig. 4, the adjusting member 22 being connected to a member 17 by a universal joint 19. The tubular section comprises a driving-member 16 detachably connected by a thread 58 and removable keys 63 retained by a removable sleeve 61 to a tube 56 fitted with a sleeve 55. The threaded portion 59 is provided with a key 67 engaging a groove 68 in the adjusting member 17 which is screwed at 69 to a plug 71; the plug 71 is carried by a tube 73. The section is provided with guides at each end and is connected with an adjacent section as shown in Fig. 3. For this purpose a body 75 is secured to the sleeve 55 and is splined to the tube 73 by pins 77. The body is connected to a body 85 by a thread 59 and by removable keys 63. The tube 73 is connected with a head 79 connected to a rod 81 and head 83. A compression spring 82 is provided to retract the adjusting member 81. The head abuts against a head 86 connected to a tube 87 the other end of which is connected to a piston head 89, Fig. 2, which shows the adjusting device. The head 89 is connected to a rod 91 having a crosspin 96 riding in slots in a tube 93 and secured to a sleeve 94 mounted thereon ; the tube 93 is secured to the driving- head 98 by a pin 99. The tube 93 is detachably connected to a part 88 forming an extension to the sleeve 55 by keys 63 and thread 59. The operating plunger 101 is mounted within the body 93 and has a slot 102 through which the pin 99 passes. A pin 103, passing through slots 105 in the tube 93, connects the plunger to an outer sleeve 104 which carries a threaded sleeve 109 fitted with a hand-wheel 114. A spring 106 retracts the plunger 101 and sleeve 104 to abut against a stop ring 108. By turning the handwheel the rod 91 and its connected parts are moved to adjust the initial radial setting of the abrasive elements against the pressure of the springs 82 and 33 ; the movement of the plunger 101 during the working stroke applies further pressure to the elements.