US2378743A - Sine plate angle wheel dresser - Google Patents

Description

June 19, 1945. A. E. WISNE 2,378,743

SINE PLATE ANGLE WHEEL DRESSER Filed Aug. 9, 1945 2 Sheets-Sheet 1 INVENTOR. ANTHONY E. WISNE His A7:T omveY June 19,1945. A. E. WlSNE 2,378,743

SINE PLATE ANGLE WHEEL DRESSER Filed Aug 9, 1943 2 Sheets-Sheet 2 INVENTOR. A NTH ONYEWIGNE HIS ATTORNE Y Patented June 19, 1945 SINE PLATE ANGLEWHEEL DRESSER Anthony Wisne, Det roit, Mich.

Application August 9, 1943, Serial No. 498,013

Claims. (01. 125-41) My invention pertains to improved angle de termining devices for dressing wheels and for any or all other machine work.

It is an object of my invention to provide an improved angle measuring or determining device which may be'quickly andcOnveniently set to various angles, with improved accuracy, and

which is of a simple rugged construction. It is a further object of my invention to provide an improved wheeldresser fordressing the cutting surfaces of abrasive wheels to various angles, which can be determined quickly and conveniently with great accuracy, which will embody a rugged and simple structure, and which will maintain its accurately determined angle in use and operation. Further objects and advantages are within the scope of the invention, suchas relate to the arrangement, operation and function of the related elements of the structure, to various details of construction and to combinations of parts, elements per se, and to economics of manufacture andnumerous other features as will be apparent from a consideration of the specification in conjunction withthe drawings disclosing specific embodiments of the invention, in which:

Fig. 1 is a side elevational View showing an angle determining and wheel dressing device in accordance with my invention;

Fig. 2 is a fragmentary sectional view taken on line 2-2 of Fig. l for showing the adjustable mounting of the wheel dresser bracket;

Fig. 3 is a plan view showing my improved angle determining and wheel dressing device one edge of the sine plate being partially broken away; and

Fig. 4 is a diagrammatic view showing how the device is quickly set to accurately determine the sine plate in a spaced apart parallel relation,

as by cap screws l9 passing upthrpugh the rolls into the sine plate, as shown. The base andthe sine plate. are heavy members of substantial thickness, preferably cast of any suitable metal,

to provide substantial strength and rigidity for accuracy. The upper and lower surfaces of the base and sine plate are planesurfaces, formed true in accordance with conventional practice, to

provide the degree of accuracy desired. Therolls are of cylindricalconformation formed in accordance with usual practice to provide the degree of accuracy required for the particular deviceandits uses.

To facilitate computation of the anglesfrom the sines thereof, the distance between the centers of, the spaced parallel rolls l5 and I! is preferably selected to be an exact number of units of linear measurement, as five or ten inches for example, although it might be made up in the metric system or other units, if desired. To center the rolls accurately when these are clamped up to the under side of the sine plate l3, the latter is provided with accurate centering grooves 2| and. 23 extending transversely in the under surface and these are so formed as to receive suitable portions of the two rolls so that a line through the centers of the rolls will be parallel to the upper surface of the sine plate so that ,work pieces or tools may be accurately supported thereon, as by clamping screws (not shown) passing into threaded holes 25 in thesineplate. As shown Fig. 1, the centering groove 2| on the left hand side of the sine plate, is a cut out corner, while the other is a groove 23 cut in the bottom surface a distance from the end of the Plate.

As may be seen in Fig. 3, the sine plate I3 is preferably substantially narrower than. the base elongated roll are journalled snugly in bearing or swivel blocks 21 which, as shown in Fig. 1, are

set into sockets 29 in the base and aresecured therein, as by screws 3| passing up through the bottom. of the base. provided with a tension slot 33 opening from the bearing aperture and providing suiiicient resiliency so that by passing a clamping screw 35 through between the opposite sides of the slot the journalled ends of the roll may be clamped to eliminate slack motion and provide greater accuracy. The extreme lower right-hand edge of the sine plate i3 is provided with a bevelled surface 3'! to enable the sine plate to be tilted up to a greater angle than would be possible if it were a square corner.

As may be seen in Fig, l, a right angle sine plate orwheel dresser support 39 of substantial strength and rigidity is provided as an integral part of the same casting rising at right angles to the main sine plate l3 directly above the cen-; ter of the elongated base roll ll journalled on the base. Rising from the upper edge of the right angle sine plat 39 is a bracket 4 l, which is square or some other noncircular cross-section, so that it is held from rotative movement as it is slidably moved up or down in a similarly shaped aperture 43 in the support. Passing transversely The swivel blocks 21 are through the upper end portion of the vertically adjustable bracket is a wheel dresser element 45 secured therein, as by a screw 41, and carrying a diamond or suitable point 49 for dressing a wheel. Also a horizontally disposed bracket of a square or other noncircular cross-section, is slidably mounted in a suitable similarly shaped guide groove 53 cut into the other side edge of the right angle sine plate 39 and secured therein as by a guide plate 55 secured by screws 51, as shown more clearly in Figs. 1 and 2. Passing transversely through the projecting end of the horizontal sliding bracket is a wheel dresser element 59 carrying a wheel dressing point 6| and secured in the bracket, as by a screw 63, for dressing the surface of an abrasive wheel 65, represented by dotted lines. Handles 66 adjust the wheel dressers.

,In operation, asrepresented diagrammatically in; Fig. 4, the lower sine plate I3 and its right angle sine plate 39 are quickly, conveniently and accurately tilted to any desired angles merely by inserting a suitable gauging member 67, or

thickness gauge, on the upper surface of the base plate -I I and under the left-hand or sine roll 15. :The lower sine plate [3 is tilted sufiicie'ntly to insert the gauge member El, and the roll 15 is then lowered onto the [gauge member. The dimens-ion of the gauge member 61 required to be a selected :for this purpose is conveniently determinable from the sine, or other function, of the desired angle or of. complementary angles, the dist-ance between the centers of the rolls l5 and H being aiknown distance'and exactly an even number of units of linear measurement. The routine is to look up the sine of the desired angle on the sine table, or other functions of the desired or complementary angles from the sine, cosine or other mathematical tables. The known distance between the roll centers being L, and

the thickness of the gauge being G, sine of angle Wis G/L. Or solving-for G equals Lx sine W. Having set the lower sine plate accurately to a conveniently without the necessity of seeking, or making, an odd gauge member. Also I may provide a series of such down-set grooves 69 of var- I vtilting to any desired angle by inserting gauge means of known thickness between one of the rolls and said base, a right angle sine plate supported on said sine plate and extending at right angles thereto, wheel dresser means, and .slidable support means carried on said sine plate for supporting said wheel dresser means extendably .for

dressing an abrasive wheel to form surfaces at accurately determinable angles. Y

, 2. A sine plate wheel dresser in accordance with claim 1, and further characterized by said base having a downset surface offset a known odd distance from the main surface of the base for receiving gauging means for tilting the sine plate.

3. A sine plate angle wheel dresser having in combination, a base plate, a sine plate,-a pair of rolls of the same diameters, said rolls being secured to the underside in a parallel relation spaced apart. alknowndistance for tiltably supporting the sine plate upon'the base plate, a right angle sine plate supported from said sine plate, wheel dressermeans, andislidable support means extendably supporting the wheel dresser means from the right angle sine plateso that wheels may be dressedat angles determined by inserting gauge members of known thickness betweenone of said rolls and i said base plate.

- 4. .In a plane plate angle wheel dresser, a base I plate, asine plate, a pair of rolls disposed between desired angle, the wheel dresser elements may I then be moved along lines bearing a definite re--' lation thereto, for accurately dressing the faces of an abrasive wheel '65, as shown in Fig. 4. The wheel dressers may be moved along manually, in the slidable supports, or may be moved along y screws or other uniform driving means,

as will be readily understood. Also the sine plate may be tilted to measure the angularity of a part or surface, and then the distance between the :sine 'roll andthe base plate may be measured by any suitable gauge, and the angle may be computed. A wide variety of uses for my improved sine plate, wheel dresser device, will be apparent for machine shops and similar worki Another feature of my improved angle determining instrument is an ofi-set or down-set sur- @fa ue, represented by the dotted line 69 in Fig. 1;

This groove or recess 69 has a bottom surface downset a known amount below the upper surface of the .base plate for the reception of a gauge member. The amount of downset is some odd measurement which is to be used frequently for some particular operation and which is not conveniently available in gauge members, so that by selecting a commonly available gauge member and setting it down into the groove on the downset surface, the necessary odd dimension is provided the base plate and the 'sine plate, securing means for securing saidrolls to the underside of saidsine plate in a parallel relation and spaced apart a known distance, a pair of parallel centering grooves in the undersideof said sine plate for receiving and holding said rolls parallel at said known distance center-to-center as the rolls are secured to the sine plate so that the insertion .of

. a .selected gauge of known thickness tilts the sine plate a known angle, which is readily ascertainable, the ends of one of said rolls being extended beyond the marginal limits .of 'the sine plate, and said base plate having means for receiving and snugly journalling the extended ends of said one roll, a right angle sine plate extending from the first mentioned sine plate, wheel dresser means, support means on said right angle sine plate for slidably supporting said wheel dresser means projecting extendably therefrom for dressing an abrasive wheel to form surfaces at accurately def terminable angles.

5. .A sine plateangle wheel dresser in accordi ance with claim 4 and .further characterized by,

said support means rising from said sine plate at right angles above the roll which is journalled to the base.

ANTHONY E. WISNE,

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