Patent GB-712554-A (GB)
Title: Gauging means for use on honing and like machines
IPC: B24B33/06
Filed: 1952-04-28
Abstract: 712,554. Linear-dimension gauges. ALEXANDER MACHINERY, Ltd., G. H., and BALL, E. D. April 24, 1953 [April 28, 1952], No. 10608/52. Class 106 (2). [Also in Group XXIII] Honing or like machines are provided with gauging means for measuring the internal, diameter of a large and long bore produced in a work piece by the machine, the means comprising a hollow cylindrical head a attached to a hollow driving spindle c and carrying the honing or like tools b. The head has a pair of diametrically opposite radially disposed cylinders d each containing a plunger e loaded by a spring f and carrying at its outer end a feeler g, e.g. a hard steel ball. Within the head is mounted, adjacent to the inner end of each plunger, a lever h connected to a stem i extending from the plunger; the free ends of the two levers are interconnected by a flexible metal tape or tapes j passing over supporting rollers k and connected to the periphery of an actuating roller m. The roller m has connected to it one end of an actuating spindle n situated parallel with the axis of and extending through one side of the head a. The spindle n is connected through rollers o and a band p to a spindle q extending along the interior of the hollow spindle c and having an actuating handle r in a position which is at all times accessible to the operator ; by operating the handle r the plungers can be retracted ; on release of the handle, the feelers g are pressed into contact with the workpiece s by the springs. The spindle q also carries an arm u for imparting movement to a movable member v which actuates the indicating finger of a dial-type micrometer w. The connection between the spindle n and the roller m is effected by antifriction balls t or rollers contained in straight grooves respectively formed transversely across the spindle and in the sides of a slot in the roller, the length of the slot being such as will allow the roller to float on the spindle and thereby ensure slight relative movement of the plungers e under the action of the tapes j. To obviate obstruction of free movement of the plungers e by fine particles produced by the action of the honing tools on the work piece, provision is made for flushing the plungers with oil or other cleansing liquid. The liquid is contained in the head a and has access to the plunger through port 2 controlled by a non-return valve 3 and then through a port x when the latter is uncovered by the plunger e; it can also pass to the surface of the plunger along a passage 4 controlled by a valve 5. Discharge of liquid from the cylinder is effected first through the port x and then, when this port is closed by the plunger, through a valve 6 loaded by a spring arm 7. Each plunger exerts a pumping action, causing its surface to be effectively flushed when a reciprocatory movement is imparted to the plungers by the handle r. To enable the gauging means to be used on work pieces of greater diameter, detachable radial extensions 8 are provided for attachment to the outer ends of the cylinders d, each extension containing an axially slidable stem 9 having a feeler 10 and actuated by the plunger e in the associated cylinder.