Patent GB-601526-A (GB)
Title: Improvements in honing and lapping machines
IPC: B24B33/06
Filed: 1945-07-06
Abstract: 601,526. Control devices for honing or lapping machines. BURGESS, A.. F. (Barnes Drill Co.). July 6, 1945, No. 17304. [Class 60] A honing or lapping machine has a tool support and a work support, one of which is reciprocated by power actuated means under the control of mechanism which comprises a control member rockable. about an axis and operative in one position to initiate movement of the reciprocable support in one direction and in another position to initiate movement of the support in the opposite direction, another control member mounted to oscillate about an axis coincident with the axis of the first mentioned control member in timed relation to the reciprocation of the support and having, mounted thereon in adjustable spaced relation, a pair of radially projecting elements between which is located a part of the first mentioned control member ; which part in the oscillation of the second mentioned control member, is alternately engaged by the radially projecting elements on such member whereby to rock the first mentioned control member between its two positions and thus to determine the range of movement of the reciprocable support. A vertical type honing machine has a tool support 14, carrying an internal honing tool 16 on a driving shaft 17, which is slidably reciprocated, on a vertical column K, relative to work W by means of a fluid actuated piston 22, rigidly connected by -a rod 23 to the tool head 14, and controlled by a reversing valve V itself controlled by a pilot valve PV operated through a rod 48, Figs. 6, 10, by a control device comprising two coaxially mounted co-operating members 30, 40. The disc-like member 30, fixed to a rockshaft 31 journalled in a bracket 33 in the main frame H; is oscillated by and with the reciprocating work head 14 by means of a chain 35 fixed to the work head and engaging a sprocket wheel 36 splined to the shaft 31. The other control member 40 in the form of a sleeve loosely mounted on the shaft 31 has a flange 41 with a cam lug 42, Figs. 6, 10, engaging a stop 43 on a pivoted lever 44 moving the pilot valve operating rod 48. Also, rigidly fixed to the flange 41 is an arm 54 with a finger 53 which is hit by an adjustable lower limit dog 50, adjustably secured on the member 30, as the head 14 approaches the end of its downward stroke ; this, through the arm 42, lever 44 and rod 48, reverses the valve PV to reverse the direction of the stroke of the tool, which stroke is again reversed when an adjustable upper limit dog 51 hits the finger 53. To withdraw the tool from the work a solenoid SOL-2 is energized, either by a time switch TS or manually, to rock a bell crank lever 64, Fig. 6, and hold the pilot valve in its downward position. Upon the withdrawal of the tool and the consequent extended movement of the disc 30 a cam plate 58 on the arm 54 releases a switch S-4 causing a solenoid SOK-1 to become de-energized and allow a spring to operate a control valve V-1 to contract the hones ; a dog 68 on the disc 30 then engages an actuator 69 of a switch S-1 to cut off the power supply. For short stroking a selected part of the work by causing a rapid reversal of the head reciprocating mechanism, the member 40 is locked to the member 30 by means of clutch mechanism and comprising a clutch ring 70, Fig. 2, mounted for axial movement on the disc 30 and having teeth 72 adapted to engage teeth 73 on the cam sleeve 40, and being operated by a slidable rod 81 extending through the rock-shaft 31 and operated by a lever 85, not shown, to move a cap member 80 having pins, not shown, to push the clutch ring 70 into contact with the sleeve 40. Specification 529,571 is referred to.