US3462888A - Polishing wheel and method for producing such wheel - Google Patents

Description

Aug. 1969 lill linh i wil FIG. 4.

Au 26,1969 D. R. YOK L- 3,462,888

POLISHING WHEEL AND METHOD FOR PRODUCING SUCH WHEEL- Filed Jan. 24, 1967 a Sheets-Sheet 2 FIG.2.

3!? Q 25 m I 1 3 9 35 5 3i FIG.3.

Aug. 26, 1969 D. R. YOKEL 3,462,888

POLISHING WHEEL AND METHOD FOR PRODUCING SUCH WHEEL Filed Jan. 24. 1967 s Sheets-Sheet? FIG].

United States Patent 3,462,888 POLISHING WHEEL AND METHOD FOR PRODUCING SUCH WHEEL Donald R. Yoke], Glenshaw, Pa., assignor to Schaffner Manufacturing Company, Inc., Emsworth, Pa., a corporation of Pennsylvania Filed Jan. 24, 1967, Ser. No. 611,286 Int. Cl. B24b 9/02, 29/00 US. Cl. 51-336 Claims ABSTRACT OF THE DISCLOSURE Background of the invention This invention relates to the polishing and bufiing art and has particular relationship to polishing wheels. The word polishing and the expression polishing wheel and like expressions are used in this application in their general sense and are meant to include within their scope bufiing and finishing as well as polishing.

Typical of prior-art polishing wheels with which this invention concerns itself is a wheel, as shown in Schaeffner Patent 3,206,894 dated Sept. 21, 1965. This wheel includes an annulus of leaves, usually of abrasive material having a hard core formed by injecting an adhesive between the leaves near the radially inner ends of the leaves and thereafter curing the adhesive. In use this wheel is driven by a shaft or arbor 97, FIG. 8, which is secured to removable flanges or end-plates 91, FIG. 8, held by nuts 99 engaging thread on the shaft.

Numerous polishing wheels as disclosed in Schaifner patent are in use and are giving highly satisfactory service. A demand has arisen for the use of such wheels in polishing strip in a strip mill or for like service. In such use a number of wheels, as many as ten or twenty, are mounted on a single shaft and are rotated in polishing engagement with the surface of the strip along its whole width.

In mounting prior-art wheels for such use it is necessary that end-plates or flanges be secured to each wheel of each array of wheels on a shaft. In use the leaves of some or all of the wheels are worn out in a relatively short time and it is frequently necessary that the wornout wheels on each shaft be removed and replaced by a new wheel. Each such replacement requires renewed removal and mounting of the end-plates or flanges. The mounting or remounting of prior-art wheels is time consuming and has a high labor cost and a high downtime cost.

It is an object of this invention to overcome this disadvantage of the prior-art Wheels and to reduce substantially the labor cost of mounting an array of polishing wheels on a shaft and the down time involved in replacement of worn out wheels of such an array. It is an object of this invention to provide a polishing wheel for acomplishing the above-stated object and a method of making such a wheel.

Summary of the invention In accordance with this invention a polishing wheel is provided which includes an annulus of leaves of polishing material having a hardened inner core and having flanges or end-plates extending over the surfaces of the annulus near its inner periphery and secured to said surface by tabs penetrating between the leaves of the core of the annulus and held by the adhesive between the leaves. The flanges have bent over lips which serve as a bearing for a drive shaft and axially aligned keyways for engaging the keys of a drive shaft. The tabs have surfaces of appreciable area which are generally parallel to the contiguous leaves of the core and which suppress any tendency of the flanges to move circumferentially relative to the annulus. The tabs may be knock-outs from the surface of the flanges and may be formed by a stamping operation where the flanges are formed.

In accordance with this invention the wheels according to this invention are made by forming the annulus, injecting the adhesive between the leaves near the inner periphery of the annulus, while the adhesive is uncured, mounting the flanges with the tabs in the adhesive between the leaves near the inner periphery of the annulus, and thereafter curing the adhesive to produce the hardened core with the flanges secured to it.

When the polishing wheel according to this invention is used, in polishing strip or like operation in array of wheels are mounted contiguously on a drive shaft which passes through the wheels. The shaft has keys which engages the keyways in the end-plates in driving relationtionship. The wheels are slipped over the shaft; there are no flanges to count or secure. Renewal of Worn out wheels is a like economic operation.

Brief description of drawing For a better understanding of this invention, both as to its organization and as to its method of operation, together with additional objects and advantages thereof, reference is made to the following description, taken with the accompanying drawing, in which:

FIGURE 1 is a view in perspective of a polishing wheel according to this invention;

FIG. 2 is a plan view of a flange of the wheel shown in FIG. 1;

FIG. 3 is a view in section taken along line IIIIII of FIG. 1;

FIG. 4 is a view in perspective showing a portion of the wheel shown in FIG. 1 severed at a leaf engaged by tabs of the flanges and viewed in the direction of line IV-lV;

FIG. 5 is a view in longitudinal section showing an array of wheels on a shaft as they are used in polishing strip or in like operations; and

FIGS. 6 and 7 are views similar to FIGS. 2 and 3 but showing the dimensions of typical end plates.

FIGS. 6 and 7 are included in an effort to aid those skilled in the art in practicing this invention and not with any intention of limiting this application.

Description of preferred embodiments The apparatus according to this invention is a polishing wheel 10 including an annulus 11 of leaves 13 of abrasive fabric having a hard core 15. Each core 15 has a circular groove 17 near its inner periphery 19 of the annulus 11 in each face.

Near the inner periphery of each wheel an end-plate or flange 21 is secured to each core 15. Each end-plate 21 is a flat annular circular disc having a projection 23 of I cross-section extending towards the annulus 11 at the outer end and a lip 25 extending inwardly of the annulus 11 at the inner end. The projection 23 engages the groove 17 in the annulus 11 and the projection 25 serves as a bushing for a drive shaft 27 for the apparatus. The endplate 21 has diametrically opposite keyways 31 at its inner periphery. Between the projections 23 and 25 the end-plates has a plurality of circumferentially spaced slots 33. A plurality of tabs 35 extend generally perpendicularly from each end-plate 21 between the projections 23 and 25. The tabs 35 are spaced circumferentially around the end-plate.

Typically each tab 35 may be in the shape of a plane geometric figure, for example, a triangle (or a part of a circle), having a linear side 37. The tab may be formed by slitting or deforming the end plates along lines corresponding to the portion of the tab extending from the linear side 37 and bending the surface defined by the slits or deformed lines along the linear side. The tabs 35 penetrate between the leaves 13 of the core 15 of the annulus and secure the end-plates to the annulus. The planes of the faces 39 of the tabs are parallel to the leaves so that the tabs prevent circumferential movement of the end-plates relative to the annulus.

End-plates 21 are secured to the cores 15 on opposite sides of the core 15. The keyways 31 of both of these plates 21 are axially aligned.

In the typical use of the apparatus according to this invention a plurality of wheels are mounted on a drive-shaft 27 with their end-plates 21 contiguous. The wheels 10 are slipped over the shaft. There are no flanges to secure separately for each wheel. The wheels 10 are mounted with slots 33 in the flanges 21 aligned axially. Air may be blown through the slots 33 to cool the inner peripheries 19 of the wheels 10.

In making the wheel 10 according to this invention the annulus 11 is formed by slipping leaves 13 on a solid ring 41 through slits in the ends of the leaves as taught by Schatfner 3,206,894. Once the annulus is formed, an adhesive is inserted by centrifugal force or otherwise as taught by Schaflner 3,206,894, through the inner periphery of the annulus 11. Typically the adhesive may include 100 parts by weight of epoxy resin 507 and 25 parts by weight of hardener 956 both made by Ciba Products Co. of Fair Lawn, NJ. These products and their use are described in Ciba Technical Bulletins 20131/3 and 20312/7 respectively. After the adhesive is injected the end-plates 21 are firmly placed on the faces of the annulus 11 with the tabs 35 penetrating between the leaves 13. The adhesive is then cured to form the hardened core and secure the end-plates 21.

While preferred embodiments of this invention have been disclosed herein many modifications thereof are feasible. This invention then is not to be restricted except insofar as is necessitated by the spirit of the prior art.

I claim as my invention:

ing eflfect on a surface by frictional engagement with said surface, said leaves at the inner periphery of said annulus having an adhesive bond therebetween defining a hardened inner core, said wheel also having flanges, contiguous to the surface of said annulus near said inner periphery, for supporting a drive shaft, said flanges having tabs thereon extending outwardly therefrom, said flanges being secured to said core by said tabs which penetrate into the adhesive between adjacent leaves and are secured in said adhesive.

2. The wheel of claim 1 wherein the flanges for each Wheel have axially aligned keyways for engaging the key of the drive shaft.

1. A polishing wheel comprising an annulus of a plurality of leaves of a material capable of producing a polish- 3. The method of making a polishing Wheel from a plurality of leaves of a material capable of producing a polishing effect on a surface by frictional engagement with said surface, the said method comprising assembling said leaves into an annulus with the leaves extending radially from the axis of said annulus, injecting an adhesive between the leaves near the inner periphery of the annulus, said adhesive penetrating between said leaves a predetermined distance from the inner periphery of said annulus, engaging a flange having tabs extending perpendicularly therefrom with the surface of said annulus adjacent the said inner periphery with the tabs extending into said adhesive between certain of said leaves, and curing said adhesive to secure said flange.

4. The wheel of claim 1 wherein each tab has a surface of appreciable area which is generally parallel to the contiguous leaves between which it is inserted and in the use of the wheel prevents circumferential movement of the flange relative to the annulus of leaves.

5. The wheel of claim 1 wherein each tab is in the shape of a plane geometric figure having a linear side and is formed by stamping a readily removable configuration in the surface of the flange corresponding to all but the linear side of the figure and bending the stamped configuration about the one side to a position generally perpendicular to said surface.

References Cited UNITED STATES PATENTS 1,693,163 11/1928 Schacht 51-379 2,474,063 6/1949 Newton 51-335 2,522,920 9/ 1950 Baltes 51335 2,818,692 1/1958 Bernstein 51-337 2,842,902 7/1958 Miller et a1. 51337 3,206,894- 9/ 1965 Schaffner 51-336 OTHELL M. SIMPSON, Primary Examiner

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