US2406514A - Roll v block support - Google Patents

Description

Aug. 27, 1946. R C, sQwRE 2,406,514-

v INVENTOR.

BY ROBERT C. .SQu/RE ATTORNEY Aug 27, 1946. R. c.-sQu1RE ROLL VEE BLOCK 4SUPPORT Filed June 5, i944 2 sheets-Sheet 2 l INVENTOR.l ROBERT C. SQu/RE ATToe/VEY ypiece II for gauging or other purposes.

Patented Aug. 27, 1946 ROLL v BLOCK SUPPORT ,Robertk C. Squire, Cleveland, Ohio, `assignor, by mesne assignments, to Jack & Heintz Precision Industries, Inc., Qlevel f off Delaware and, Ohio, a corporation Application .lune 5, 1944,-Seri'al-No; 538,861

'Ijhis invention relates to an improved V `bloc-k support and has as its general object to provide a, support ofthis general typev which will have a longer life before it must be reground and which may be regjroundwith greater facility than conventional V block supports. A particular object is to provide a V block support wherein the supporting trough or V surfaces rcomprise hardened steel rolls which may be rotated from timev to time to distribute the Wear without requiring a regrinding operation until they have been worn on all sides thereof.

With these and other objects in View, the invention resides in the particular arrangement and combination of parts to be described in connection with the accompanying drawings in which:

Figure 1 is a plan View of a roll V block support embodying the principles of the invention;

Figure 2 is an end elevation View of the device shown in Figure 1, showing a sensitive gauge applied to the work; and

Figure 3 is an end elevation view of a modified form of the invention.

The device of Figures 1 and 2 comprises essentially a trough-shaped base or housing I which contains a pair of hardened steel, cylindrical rolls 2 and 3. The rolls 2 and 3 rest upon a plane horizontal surface 4 within the trough and are forced into an abutting relation along a line contact at 5 by means of a plurality of oppositely directed screws 6. The rolls 2 and 3 are further constrained rigidly in the position shown in Figure 2 by means of top plates 1 and 8 secured to the top surfaces of the housing I by means of screws 9. The relationship of the parts is such that the toe portions I I) of the plates 'I and 8 bear firmly on the rolls 2 and 3 to prevent any looseness in the assemblage. If desired, shirns may be provided between the plates 'I and the sides of the housing I to which they are attached to maintain the proper force upon the rolls 2 and 3 to compensate for wear when the latter are reground.

'Ihe rolls 2 and 3 thereby comprise a V block support adapted to support a cylindrical work The numeral I2 indicates a gauge having a sensitive gauging nger I3 adapted to bear lightly upon the work. The gauge may be supported inthe conventional manner by a standard I4 on a base I5 adapted forpositioning alongside the housing I on a common supporting surface I6. The trough I is provided with lateral grooves or recesses I1 for rmly clamping the same upon the surface I6 and the lower surface of the trough zclaims. (ci. zzn- 19.)

may be diagonally serrated to obtain a flat seating `upon the supporting Vsurface I6 in. the presencexilf` chips and other foreign material.

Th1-1s, it willV be seen thatv if av large number of identical work pieces II are gaugedf, wear will voccur on the rolls 2 and 3 along line contacts at 20, 20 between the work and the rolls in the same manner and to the same extent as the wear occurring in conventional one-piece V block supports, and when it accrues to a measurable amount, the support must be reground. In the present construction, when such measurable WearV occurs on the rolls 2 and 3, it is only necessary to slightly loosen the screws 6, and the top plates 'I and 8, so that the rolls 2 and 3 may be slightly rotated to bring true surfaces into contact withy the work piece I I. The rolls may thus be rotated a great number of times to distribute the wear therearound, before regrinding is necessary, thus providing an initial life -before regrinding manyl times the initial life of a conventional one-piece V block support.

Another advantage is that the rolls 2 and 3 may be readily ground in centerless grinders to a true cylindrical shape much more easily than the plane V surfaces of a conventional V block support may be ground to true planes, the regrinding of the latter being a relatively intricate operation in order to obtain the desired degree of precision. In this manner, the rolls 2 and 3 may be reground again and again without widening the V. v

A still further advantage of the present construction is the universal utility of the device for supporting cylindrical work pieces II kof widely varying diameters. Inasmuch as there is no gap between the rolls 2 and 3, Very small, as well as very large, work pieces may be supported with equal facility and precision. The support is particularly adapted for testing cylindrical work pieces for eccentricity and taper, and for other purposes, as shown in Figure 2. The dial of the gauge I2 may contain markings to indicate plus and minus tolerances in thousandths of an inch,

' or other units, in accordance with the indication produced by the work engaging finger.

Numeral 2l indicates vertical holes through the sidewalls of the trough I, adapted to carry upstanding posts for a bridging member havingresilient bearingy on top of the work piece II.

In the modication shown in Figure 3, wherein the same reference numerals are Vused to designate corresponding parts, upstanding posts 25 are supported in tapped holes positioned in the same relation as the holes 2I, 2| in Figure 1. These l In the embodiment of Figure 3 Y Y i provided on only one side of the troughV |to in- 1 1 sure the perfect alignmentjof vtherollsj2 ,and 3,

the appended claims'.Y

A posts carry a bridging member 26 urged downwardly by springs 21 which are backed up by adjustable thumb screws 28.y `The bridge26 carries a slider 2'9 having work engaging rollers 30 toV z maintainV the work piece I I in firmer contact with the rolls V2 `and 3 than would be accomplished by i gravity alone.Y This additional holdingv means provides for greater accuracy 'and uniformity in gauging technique, particularlywhen the workl pieces are small or light, as in the case ofV aluminum or magnesium alloy parts.

with the opposite side thereof. l

In accordance with the patent statutes, I have Iclaim: 1. A precision V block support, comprising a Y generally trough-like housing member, a pair of Vset screws 6 Yarer shown and described preferred .embodiments of e 1 the invention for the' purpose of illustrating the y 3 principles thereof to enable others skil1ed in the art to make and use the same),Y but it is vto be understood that the invention is capable .0f-many modications. All 'such Vchanges in the Yconstruction and 'arrangement' yare Yincluded-inl the invention, the same beinglimitedV only by thescQpe of hardened smooth cylindrical rolls disposed lengthwise in the trough of said member, a'plurality of clamping members carried by the sides of said troughlike member and engaging said rolls to maintain them in contacting side-by-side engagement, and a pair of top plates secured to the sides of said trough and. bearing upon the upperisurfaces of said rolls to retain said rolls against the bottom of said trough.

2. A precisionv V block support, comprising a trough-like member having apair of smooth cylindrical members clamped in side-by-side contacting relation therein to present V supporting surfaces therebetween, a pair of upstanding posts on said trough, a bridging member carried by said posts, a work-engaging member carried by said bridging member, and adjustable resilient means on'said posts acting onr said vbridging membergto urge said work-engaging memberagainst av work piece to hold same rmlyfin contact with said V supporting surfaces.

Y lYRQBERT lC. SQUIRE. l

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