US2276611A

US2276611A - Honing device

Info

Publication number: US2276611A
Application number: US271849A
Authority: US
Inventors: Kirke W Connor
Original assignee: Micromatic Hone Corp
Current assignee: Micromatic Hone Corp
Priority date: 1939-05-05
Filing date: 1939-05-05
Publication date: 1942-03-17
Anticipated expiration: 1959-03-17

Description

Patented Mar. 17, 1942 A HONIN G DEVICE 'Kirke W. Connor, Detroit, Mich., assignor to Micromatic Hone Corporation, Detroit, Mich. a corporation of Michigan Application May 5, 1939, Serial No. 271,843

3 Claims.

This application is a continuation in part of my application, Serial No. 76,520, filed April 27, 1936, which issued as Patent No. 2,200,573, on May 14, 1940, and relates to honing methods and apparatus, and particularly to a honing method and device which employs a single abrading element which is rapidly oscillated and advanced relative to a surface to be honed to produce an accurate and highly polished surface.

In my Patent No. 2,108,029, dated February 8,

- 1938, and assigned to the assignee of the present invention, a method and apparatus are disclosed wherein a plurality of honing elements are rapidly reciprocated in timed relation to the speed of rotation of the tool to produce .a predetermined angular intersection of the paths of abrasion during the time the tool and work are fed relative to each other. Certain features embodied in the invention of the above mentioned application appear in the present invention.

In the present invention a single honing element is employed which eliminates any binding anduneven wear on the stones which may occur when a plurality of the stones are employed in a single tool. It is substantially impossible to grade the abrading stones relative'tov hardness so that when a group of stones are employed, a

the wearing qualities of some are materially greater than those of. others and, as a result, certainstones wear faster than others, causing a binding between the stones when depending upon each other for support within the work piece and uneven wearing of the stones.

Due to the rapid oscillation of the honing stone, a method of grinding is provided which simulates that of hand polishing wherein the hand is rapidly oscillated to move an abrading element over the surface to be honed. A feed movement is introduced between the oscillating stone and the work to extend the abrading op eration uniformly over the surface.

Accordingly, the main objects of my invention are; to provide a method whereby an abrading stone is rapidly oscillated during the time a feed movement is provided between the work and the stone; to provide rapid reciprocation of a single honing element having an engaging surface congruent to that of the work and advancing the work and honing stone relative to each other to v cover the entire surface to be finished; to provide a tiltable spindle having a single expansible abrading element thereon projecting into a work piece to contact the tapered surface of a cylindrical element through adjustment of the support for the spindle and reciprocating the spindle and rotating the work piece in timed relation with each other; and in general, to provide apparatus for accurately machining surfaces to a high mirror finish, which is simple in construction, positive in operation and economical of manufacture.

Other objects and features of novelty of my invention will be either specifically pointed out or will become apparent when referring, for a better understanding of my invention, to the following description taken in conjunction with the following drawing, wherein:

Figure 1 is a view partially in section and partially in elevation of structure embodying features of my invention; and

Fig. 2 is a wiring diagram which may be em Q ployed for controlling the operation of the motors illustrated in Fig. 1.

' In Fig. 1 I have illustrated the principles above set forth, that of rapidly oscillating a honing stone and providing a feed between the stone and work surface during such rapid oscillation, as embodied in a device adapted to hone conical objects. The work piece is illustrated as being a conical race- I of a bearing which is supported in a holder 8 on a shaft 9 driven through a gear II. The gear ll may be driven through suitable pinions 6, by a motor III, the speed of which may be regulated as pointed out hereinafter. The honing stone I2 is supported in aspindle l3, spring pressed outwardly; fromthe axis .of the spindle. The spindle is supported for reciprocation in a boss [4, and is keyed thereto by a key I l5 to prevent rotation of the spindle relative to A head I6 is provided on the end of the spindle, being urged toward a cam H by a the boss.

spring l8. The cam I'I is.carried on a shaft IQ of a motor 2|, the speed of which is adjustable.

The boss I4 and motor 2| are mounted on a car- M riage 22 which is shiftable upon a table 23 by suitable means herein illustrated as a lead screw 24. The table 23 is tiltable relative to the table 25 on which the work support 8 is secured through a hinge 26 which interconnects the tables. A clamping nut 21 retains the table in position and through a. quadrant 28 provides indicating means for setting off the relative angle of slope. The carriage 22 is retracted to have the stone l2 disengage the work piece I so that it may be removed and a new work piece'inserted within the support 8. Thereafter the carriage 22 is advanced to have the stone I2 engage the surface of the work piece I and to be biased inwardly toward the axis of the spindle l3 upon further advancement of the carriage. The operation'of the motor 2| causes the stone l2 tobe rapidly oscillated while the work piece I is rotated in predetermined relation to such oscillation.

Referring to Fig. 2, I have illustrated a wiring diagram wherein the motors I and 2| are disposed in series with rheostats 29 and switches 3| independently connecting the motors to a circuit. Through the adjustment of one or both of the rheostats the motors I0 and 2| may be changed in speed to vary the relative movement in reciprocation and rotation of the stone and work piece to thereby change the angle of crossing of the resulting scratch marks on the work piece surface. For various sizes of work pieces, for various types of metal and for different abrasive material, the angle of crossing of the scratch marks should be varied to produce the desirable type of honing and finishing.

In the wiring diagram of Fig. 2, I have illustrated in conjunction with therheostats 29, solenoids 32 which cut in a predetermined amount of resistance when energized, to vary the speed of operation of the motors. The flow of current to the solenoids 32 is controlled by a time switch 33, which may be employed to actuate both of the solenoids, or individual time switches may be employed, one for each solenoid. As pointed out above, the desirable angle of scratch marks employed in a rough honing opmarks to produce a fine finish, while operating ergization of the solenoids through the operation of the time switch or switches. The switch or switches are set to operate upon the completion of the rough honing operation which thereby changes the type of honing from that employed during the roughing operation to that desired for the finishing operation. It therefore follows that I have illustrated a honing device employing a single honing stick which is moved radially from a spindle while being retained in fixed relation thereto. The spindle oscillates the stone across the tapered surface of a cylindrical work piece. the angle of thestone being. adjusted to that of the taper. The spindle support has a pivotal connection and is locked in position by means of a quadrant, the scale of which checks the position of the stone. The work piece is rotated during the oscillation of the abrading stone while the abrading stone is fed parallel to the path of oscillation of the stone. The compound movement thus provided between the stone and the surface to be finished to accurate dimension may be varied byregulating the speed of the motors driving the'abrading stone in reciprocation and the work piece in rotation. A setting may be arranged by which the change from one speed of relative movement to another may occur between two different phases of operation, that of rough honing and that of home finishing a surface. i

While I have described and illustrated but a single embodiment of my invention, it will be apparent to those skilled in the art, that various changes, omissions, additions, and substitutions may be made therein without departing from the spirit and scope of my invention as set forth in the accompanying claims.

What I claim is:

1. A honing device for machining a tapered surface including, in combination, a base, a sup-' port for a workpiece, means for rotating said support, a honing tool, a support for said honing tool. hinged to said base and adjustable for pcsitioningthe slope of the honing tool, a table on 1 said support on which the honing tool is mounted movable toward and away from said worksupport, means on said table for reciprocating said tool, and a stone in said honing tool spring pressed outwardly against the surface of the workpiece to be honed.

2. A honing device for machining a tapered surface including. in combination, a base, a support for a workpiece on said base, means for rotating said support, a honingtool, an angularly adjustable support for said honing tool for positioning the slope thereof relative to the tapered surface of the workpiece, a table on said support on which the honing tool is mounted for movement toward and away from said work support, means on said table for reciprocating said tool, a honing stone in said honing tool, and means for urging said honing stone outwardly of said tool against the surface of the workpiece to be honed.

3. A honing device for machining a tapered surface including, in combination, a base, a support for a workpiece on said base, means for rotating said support, a honing tool, an angularly adjustable support for said honing tool for positioning the slope thereof relative to the tapered surface of the workpiece, a table on said support on which the honing tool is mounted for movement toward and away from said work support, means on said table for reciprocating said tool, a honing stone in said honing tool, means for urging said honing stone outwardly of said tool against the surface of the workpiece to be speed of the workpiece in rotation and the abrasive stone in reciprocation.

KIRKE W. CONNOR.