Showing papers on "Honing published in 1968"

Honing and sharpening machine

Abstract: A honing and sharpening machine for small tools and instruments such as those used by dentists, having a housing with an upper panel on which is mounted a reciprocal carriage for a honing or sharpening stone. The carriage is supported by a pair of end members rigidly mounted on the panel and is driven by a motor disposed in the housing beneath the carriage. The carriage and stone are reciprocated rapidly by the motor and the stone may be contoured to provide the optimum surface for shaping and reconditioning the tools and instruments.

Gear honing machine

Abstract: A multi-surface machining apparatus and method for simultaneously machining the center bore of a gear workpiece concentric to the pitch circle of the gear teeth, and machining one or both of the end faces of the gear workpiece perpendicular to the axis of the center bore. The gear workpiece is rotated in a centerless manner by a pair of master gears comprising a driving gear and a braked retainer gear. The master gears improve the surface finish characteristics of the tooth flanks of the gear teeth while rotating the gear workpiece. Simultaneously, a first machining means is reciprocated axially in the gear workpiece center bore, and a second machining means is reciprocated over one or both of the end faces of the gear workpiece in a direction perpendicular to the axis of the center bore.

Method and device for the honing of conical bores

Abstract: 1,183,249. Honing conical bores. A. ROHR. 8 Dec., 1967, No. 56053/67. Heading B3D. A method of honing a conical bore includes the step of effecting a relative rotational movement between honing stone holders and expanding means associated therewith to adapt honing stones held in the holders to the particular diameter of the conical bore to be honed. A device for carrying out the method includes a honing tool comprising a central spindle at one end of which there are secured expanding means, an outer body which is mounted rotatably on the central spindle, honing stone holders which are guided in the outer body and are operatively connected to the expanding means, and means for resiliently coupling the central spindle and the outer body to one another. A honing tool comprises a central spindle 1 slightly thickened at one end to serve as a handle and carrying at its other end eccentrically arranged cylindrical pins 2 engaging the rounded inner ends of holders 4 mounted in slots 3a in an outer body 3; the holders 4 carry honing stones 4a. A nut 5 on the body 3 has a shoulder 5a within which is a torsion spring 6, one end of which is attached to the nut 5, the other end being hooked round a pin 7 projecting from the spindle 1 through a slot in the body 3. The nut 5 is turned to load the spring 6 and then secured to the body 3 by a screw 8. To insert the tool into a bore the spindle 1 and body 3 are relatively turned to permit garter springs 9 to collapse the tool; during honing of a conical bore the spring 6 maintains the tool expanded. The work is rotated.

Tool stone expander unit for honing machines

Abstract: 1,131,440. Honing. BROOKES (OLDBURY) Ltd. 22 Sept., 1967 [27 Sept., 1966], No. 43093/66. Heading B3D. A honing tool comprises stones 10 movable radially in a carrier 11 by cams 13 mounted on oppositely-handed screw threaded portions of a control rod 15a, 15b; a motor is mounted at one end of the driving spindle 18, the motor casing 22 being rotatable with the driving spindle and the motor spindle 23 being connected to the control rod, actuation of the motor to rotate its spindle relative to its casing effecting relative axial movement of the cams 13. The motor is preferably an, hydraulic motor supplied through a coupling 24. The supply may be controlled by a pressure regulating valve so as to maintain the pressure applied to the stones at a substantially constant level. Alternatively a predetermined amount of feed may be imparted to the stones by passing a predetermined volume of fluid into the motor. The motor may be electric or operated by compressed air. The motor spindle may be connected to the control rod through gears.

Improvements in or relating to grinding and like processes

Abstract: 1,114,415. Grinding, stropping, honing, polishing. WILKINSON SWORD Ltd. 23 June, 1965 [27 June, 1964], No. 26687/64. Heading B3D. A method of effecting an abrasive process, e.g. grinding, stropping, honing or polishing, in which an abrasive member is applied to the material being processed with a force of predetermined value includes the steps of (a) continually monitoring the presence of the material to be processed by sensing a partial vacuum maintained by the material, the partial vacuum being broken when the material is absent, and (b) applying a counterforce to the abrasive member in response to breaking of the vacuum, the value of the counterforce being greater than the predetermined value. Razor blade strip conveyed by a pegged band through a guide 16, is stropped by stropping discs 10, 10 carried by a pair of double arms 11, 11 pivoted at 12 on a part 13 mounted on a slide 14 adjustable towards and away from the guide 16 by a control knob 15. The arms 11, 11 carry counterbalance weights 20, 20. The discs 10, 10 may be driven from one or more motors mounted on the machine base and driving through a layshaft coaxial with the pivot 12 and belt or chain drives. For other operations on the strip grinding or honing wheels or polishing pads are used instead of the discs 10 10. One double arm 11, 11 is loaded by a pneumatic cylinder 22, supplied from a reservoir 23 through a regulator 24; a gauge 25 is provided. The arms are damped by an hydraulic, pneumatic or eddy-current damper 26. The other double arm is similarly but oppositely loaded. Partial vacuum may be used instead of pressure. Contact of the discs with the guide when no strip is present is prevented by a pneumatic cylinder 27 supplied from the reservoir 23 through a regulator 29. When strip is present it closes a hole 31 so that a vacuum pump 32 reduces the pressure on one side of a diaphragm valve 30 to cut off the air supply to the cylinder 27. The controlled loading and the counterforce may be produced by other means than penumatic, e.g. by dead weights, electrical means, hydraulic pressure or springs in conjunction with mechanical linkages.