US2515695A

US2515695A - Apparatus for grinding arcuate or annular work

Info

Publication number: US2515695A
Application number: US764944A
Authority: US
Inventors: Henry E Caston
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-07-31
Filing date: 1947-07-31
Publication date: 1950-07-18
Anticipated expiration: 1967-07-18

Description

July 18, 1950 H. E. CASTON 2,515,695

APPARATUS FOR GRINDING ARCUATE OR ANNULAR WORK Filed July 31, 1947 s Sheets-Sheet 1 IN VEN TOR.

HENRY E ms TON Gaol-nay July 18, 1950 H. E. cAsToN 2,515,695

APPARATUS FOR GRINDING ARCUATE 0R ANNULAR WORK Filed July 31, 1947 I Y '5 Sheets-Sheet 2 INVENTOR.

HENRY E. CH5 TON Claw-1 July 18, 1950 CASTQN 2,515,695

APPARATUS FOR GRINDING ARCUATE OR ANNULAR WORK Filed July 31, 1947 3 Sheets-Sheet 3 INVENTOR.

HENRY E. CASTO/V Utter/15y bracket, to extend radially inwardly thereof a substantial distance, and nuts 31 are provided on radially outwardly projecting ends of the pins for locking the same in adjusted position. The pins are of metal of a character which permits the inner ends thereof to be ground to a predetermined radius from the center of backing plate M, in a manner to be described later, for accurate orienting'engagement with said outer periphery of the segment.

In the use or operation of the improved ap-,-

paratus for grinding a segmental ring I!) of given size, such as the size best shown in Figures 1, 2 and 4, the brackets l8, through the

bolts

25 and 26, are radially adjusted along the slots tocircumferentially spaced positions in which the inner ends of the three triangularly arranged'or staggered

pins

34, 35 and 36, of the respective brackets, are at a radius from the center of backing plate J4 slightly less than the true radius of the outerperiphery of the ring ID, or in other words of the segments. With the segments clamped in this relation, as best shown in Figure '3, the'operator through adjustment of hand wheels H and R (Figure 6), may present the rotary grinding wheel W, while rotating at suitable, speed, at the desired position and angle to grind the inwardly-presented ends of the pins to, an accurately predetermined radius the. same asithje given radius of the outer peripheral surfaces of the ring segments IL,

,,With the pins thus accurately radiused at the inner ends, theoperator next mounts a segment I! in each bracket 2|], holding the outer peripheral. surface thereof self-centeringly against the ends of the pins, and thenfirmly clamps the segment between the

spacer blocks

29, 29, and the clampinglug 3|, by tightening the screw '32. A separate spacer block 38, may be clampinglyv engaged between an outwardly extending portion 3la offthe lug 3| and the outer flange 24 to en hance said clamping action on the segment H..

When all of the segments are similarly clamped in accurately centered relation, the operatormay move rotary grinding wheel W to various angularly adjusted positions to grind the various inner surface portions of the segments, as shown in Figure 4, for example. manner be accurately resurfaced to predetermined. contour, as checked from time-to-time with a contour template- The apparatus may be similarly operated and used for regrinding either segmental or continuous rings of various sizes and proportions, by radially adjusting the brackets I 8 and grinding the ends of

pins

34, 35 and 36 accordingly in each instance.- If necessary, the metal spacer blocks 29 .may be ground by use of wheel W to adjust.

the work to suit the clamping lugs 3|. In any case the segments II should project beyond the outer edgesof the brackets thereof to be properly engaged by the clamping lugs.

.Referring now to Figure 5, there is shown work-supporting and grinding apparatus, which is inl all respects likev that previously described except that it is designed for grinding the outside surfaces of annular or arcuate work, such as segments 40 of a segmental ring 4 l, Each segment is oriented or centered against pre-ground, arcuate ends of

threepins

43, 44 and 45 in each of a series of brackets 46, radially adjustably mountedona rotatablebacking plate 42, as before, the ends of the pins, however, being pre'-. sented outwardly and engagin inner peripheral portions of the segment. Clamping lugs 41, cor- The work may in this.

4 responding to lugs 3|, are operable by means of screws 48 to hold the work in position on the bracket 46 and against the backing plate.

Other modifications of the invention may be resorted to without departing from the spirit thereof or the scope of the appended claims.

What is claimed is:

1. In apparatus for treating arcuate or annular work, the combination with a cutter or other treating tool adjustably mounted to be presented in various adjusted positions, of a support, a backing member mounted on said support to rotate about an axis and having a work-supporting face portion in a plane transversely of said axis, p0wer means operable to rotate said backing member about its axis, a work-holding bracket, 'means for mounting said bracket on said backing member against said face portion thereof in difierent adjusted positions radially of said axis, saidbracket having orienting projections extending therefrom radially of said axis fo'ri engaging one arcuate side of the work, an adjustable clamping device of said bracket for clamping the work against said face portion of the backing member while said arcuate side of the'work is oriented against said projections, thereby to present the opposite arcuate side of the Work for treating engagement by said tool as. said member is rotated.

"2. The combination as set forth in claim 1 said orienting projections comprising elements radiallyfadjustable to fixed positions with respect tolsaid brackets presenting free endsof the ele ments atlradii corresponding to radii of said opposite, arcuate side ofv the work.

3 'Ihecombination as set forth in claim 2, said free' endslof said elements being of material which canibe" reduced by said tool to accurately predetermined radii complemental to the radii of the first-named arcuate side of the work.

lf'In apparatus for treating arcuate or annular work, the combination with a cutter or other treating tool adjustably mounted to be presented in various adjusted positions, of a support, a

backing member mounted to rotate about an axis .and having a work-supporting face portion in a plane transversely of said axis, power means j operable to rotate said backing member about its axis, a plurality of Work-holding brackets,

adjustable means for mounting said brackets on said backing member against said face portion thereof in different I adjusted positions radially of said axis, said brackets each having a plurality of orienting projections extending therefrom I radially of said axis for engaging an arcuate side. of the work, an adjustable clamping device on each said bracket for releasably clamping the work against said face portion of said backing member while said arcuate side of the work is oriented against said projections, thereby to present the first-named arcuate side of the work for. treating engagement by said tool as said,

member is .rotated.

5. The combination as set forth inclaim 4, said orienting projections comprising elements radially adjustable to fixed positions with respect to said brackets presenting free ends of the elementsat radii corresponding to radii of the firstnamed arcuate. side of the work.

the first-namedarcuate side of the work.

'7. The combination as set forth in claim 6, said adjustable mounting means comprising a radial slot in said member for each said bracket, guide portions on said brackets slidably engageable along said slots, and clamping bolt means through said brackets and said slots.

8. In apparatus for treating arcuate an annular work, the combination with a cutter or other treating tool adjustably mounted to be presented in various adjusted positions, of a support, a backing member mounted on said support to rotate about an axis and having a work-supporting face portion in a plane transversely of said axis, power means operable to rotate said backing member about its axis, a plurality of work-holding brackets adjustable means for mounting said brackets on said backing member against said work-supporting face portion thereof in different adjusted positions radially of said axis, said brackets each having at least three transversely and circumferentially spaced orienting projections extending therefrom radially of said axis for engaging an arcuate side of the work, an adjustable clamping device on each said bracket for releasably clamping the work against said face portion of said backing member while said arcuate side of the work is oriented against said projections, thereby to present the firstnamed arcuate side of the work for treating engagement by said tool as said member is rotated.

9. The combination as set forth in claim 8, said r free ends of said projections being of material which can be reduced by said tool to accurately predetermined radii complemental to the radii of the first-named arcuate side of the work.

10. In apparatus for treating arcuate or annular work, the combination with a cutter or other treating tool adjustably mounted to be presented in various adjusted positions, of a support, a backing member mounted on said support to rotate about an axis and having a, work-supporting face portion in a plane transversely of said axis, power means operable to rotate said backing member about its axis, a plurality of work-holding brackets, adjustable means for mounting said brackets on said backing member against said work-supporting face portion thereof in different adjusted positions radially of said axis, said brackets each having a plurality of orienting projections extending inwardly radially of said axis for engaging an arcuate side of the work, an adjustable clamping device on each said bracket for releasably clamping the work against said face portion of said backing member while said arcuate side of the work is oriented against said projections, thereby to present the firstnamed arcuate side of the work for treating engagement by said tool as said member is rotated.

HENRY E. GASTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 433,919 Wickers Aug. 5, 1890 1,993,831 Dall Mar. 12, 1935 2,208,879 Blazek et a1. July 23, 1940 FOREIGN PATENTS Number Country Date 325,606 Germany Sept. 15, 1920