US2302105A - Abrading device - Google Patents

Description

Nov. 17, 1942.

K. w. CONNOR 2,302,105

ABRADING DEVICE original Filed April 27, i936 NVENTOR BY M 2 A TORNE Ys.

Patented Nov. 17, 1942 ABRADING DEVICE Kin-ke W. Connor, Detroit, Mich., assigner to Micromatic Hone Corporation, Detroit, Mich., l. corporation oi' Michigan Original application April 27, 1936, Serial No.

76,520, now Patent No. 2,200,573, dated May 14, 1940. Divided and this application May 1,

1939, Serial No. 271,0

1 Claim.' (Cl. 51-67) This invention is a division of my application, Serial No. 76,520, filed April 27, 1936, which matured as Patent No. 2,200,573, May 14, 1940, and relates 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 and uneven 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 to hardness so that when a group of stones are employed, the wearing qualities of some are materially greater than those of others and, as a result, certain stones 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 operation 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 cover the entire surface to be finished; and, in general, to provide apparatus for accurately machining surfaces to a high mirror inish, 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, of a device operating on the external surface of a cylindrical work piece and embodying features of my invention;

Fig. 2 is an enlarged broken sectional view of structure illustrated in Fig. 1, taken on the line 2 2 thereof; and. i

Fig. 3 is a wiring diagram which may be employed for controlling the operation of the motors illustrated in Fig. 1,

In Fig. l I have illustrated a form which my invention may assume, embodying a honing stone 9| having a concave surface engaging a cylindrical surface 92 of a work pie'ce 99. 'I'he work piece is supported on centers 94 and driven in rotation by a motor 96. The honing stone 9| is mounted in an oscillatable head 96 and is biased outwardly therein by springs 91.

The head 96 is mounted for lateral oscillation on the end of a housing 99, supported on the end of a link 99. The link 99 is pivoted at |0| and is provided on its lower end with a slot |02 through whichl a pin |03 in the projecting lug' supported on a carriage |09 which operates in' ways |I| supported by a second carriage ||2 which is operated in ways H3 at right angles to the ways lll. The carriage |09 is actuated by suitable means herein illustrated as a lead screw Ill, while carriage ||2 is illustrated as being actuated by a lead screw ||5.

In operation, the motor drives the work piece 93 in rotation at a predetermined speed relative to the oscillation of the honing stone 9| controlled through actuation of rheostats 49 as illustrated in Fig. 3. The stone is moved into predetermined relation to the surface 92 of the Work piece 93 by the operation of the lead screw ||5 to move the carriage ||2 downwardly toward the Work piece. During the abrading operation, the honing stone 9| and work piece 93 are fed relative to each other axially of the latter to have the abrading operation spread over the entire length of the surface to be machined. In the structure illustrated, the operation of the lead screw III moves the carriage |09, and therefore, the abrading stone 9|, along the surface 92 parallel to the axis of the work piece 93. In this manner, a very accurate and highly polished surface is provided, which surface is known in 5 the art as a mirror nish.

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 10 may be made therein Without departing from the spirit and scope of my invention as set forth in the accompanying claim'.

Images