US2632433A - Diamond holder with gauging means - Google Patents

Description

March 24, 1953 w. MUENCH 2,632,433

DIAMOND HOLDER WITH GAUGING MEANS Filed March 5, 1947 8 v W J] IILEQEI- 2/ 9 I P 5 1 INVENTOR.

' I ilZiefi/Tfa en v Patented Mar. 24, 1953 DIAMOND HOLDER WITH GAUGING MEANS Walter Muench, Newark, N. J assignor to Walter Muench, Incorporated, Newark, N. J a corporation of New Jersey Application March 5, 1947, Serial No. 732,623

1 v This invention relates to surface grinding wheels in which concave or convex radii are formgenerated by a diamond studdedshank-proper which is held in a fixture and in the construction of which the mechanical functions are so arranged that thediamond holding shank-proper can be raised or lowered to produce different sizes of concave or convex radii in the. grinding whee1 periphery.

To predeterminethe size of a radius desired in a grinding wheel periphery, the height of the diamond point in the shank-proper is adjusted relatively to a fixed pivot height in a stationary right angle fixture, which consists of a fiat base plate that isheld tight to a magnetic chuck, whereas in the upright column a swinging arm is held in a close fitting bearing and it is in this arm that the diamond-shank-proper can be moved up or .down and clamped in place after the correct height above the pivot point has been obtained by measuring from the bottom surface of the swinging arm over the point of the diamond, held in the shank-proper.

A micrometer is always used in this measuring procedure to set the diamond point at the right height to dress the grinding wheel for a certain radius and it is by this applied screwpressure of the micrometer spindle on the cutting point of the diamond that damage can easily be done to the small frail diamond with resultant great inaccuracies in the form-grinding of machine parts, tools,molds and dies.

'To overcome this malpractice to apply micrometer pressure on the diamond point is the object of my invention.

To enable others, skilled in the art to fully comprehend the underlying features of my invention, a drawing, depicting a preferred form has been annexed as a part of this disclosure and.

in this drawing similar reference characters denote corresponding parts throughout the several views, of which Fig. 1 is a side view of a radius dressing fixture with the shank-proper, holding the diamond and the plunger with measuring plate, in place.

Fig. 2 is a front view of the same wheel dresser as'shown in Fig. l in the direction from X to Y.

Fig. 3 is an illustrative angular view of a modified form of a diamond holding shankproper.

Referring now to the drawing, I designates the baseplate, which, when in operation, is held tight to a magnetic chuck and 2 is a right-angle upright plate which is rigidly fastened to the base plate I. An extension 3 is solidly cast to 2.

'7 Claims. (Cl. -11) .2 A shaft 4 reaches through 2 and 3, having attached to it at one end the hand-wheel 5, while the other end of. the shaft is solidly fastened to the arm 5, which can be swung by turning the hand-whee1 5 through an arc of At the extreme end of arm 6 the shank I is held'in place by a set-screw ,8. To this shank I is cast the extension 9 which holds in one end the diamond lil, while the opposite end is provided with an adjustable heel in the formof a threaded disc pin I I. To the sliding plunger 12 is attached the measuring plate I3, which rests on top of the disc pin H and illustrates the very position when measurements for the height of the diamond are taken to form-generate whatever radius is desired in the periphery of the grinding wheel. As regards Fig. 3, here the measuring base is the fixed raised heel l5, which of course is non-j adjustable, but is held at the same height as' the highest point of the diamond, held in tool i4.

My invention consists in the provision of the raised heel l5 and a modified form of this is the threaded disc-pin H, which is adjusted to precisely the same height as that of the highest point of the diamond I0 in Fig. 1, so that, when plate [3 rests on top of thedisc-pin H and a measurement is taken with a micrometer, the diamond remains free. and clear of any pressure contact and consequently cannot be damaged or wrecked under the screw pressure of the micrometer when carelessly handled, or when the contact surfaces of the micrometer, that means the anvil and spindle, are not perfectly parallel; which is only too often the case with micrometers that have been in use for a number of years.

The tool shown in Figs. 1 and 2, singled out by characters I, 9, l0 and is most suitable fo dressing any size of a convex radius.

However, the tool shown in Fig. 3, and desig-. nated I4, is used preferably only for small concave radii in the sizes from tie" up to The individual tool sizes are advisably made in steps of 4,". For these small concave radii forming tools the fixed heel I5 is provided in place of the disc-pin H for measuring over; though the adjustable disc-pin-arrangement can also be applied whereby the price of the tool would increase considerably. It is of course understood that the heel I5 is ground to the same height as the highest point of the diamond is, in tool I l. When the diamond wears, the heel E5 can be ground down to the same level of the diamond point. The wear of the diamond is checked'with a sensitive indicator or a shadowgraph. If the check-up shows a wear of .001 or more of the diamond, the heel need not necessarily be ground down to compensate for the difference of the height of the heel 15. Really all that is required. is to mark the difierence in height between the diamond and heel i and allow for the dinerence in the depth of cut when dressin the wheel.

It shouldbementionedthat the adjustable discpin H in Fig. 1 must be reset as the diamond Wears down in use. A set-screw will hold the disc-pin H secure in place after adjustments have been made.

It should also be noted that the sliding plunger [2 with its attached measuring plate i3 is taken out of the fixture after the correct height of the diamond has been obtained by measuring with a micrometer as previously explained. The removal of the plunger-unit is necessary forthe operation of the fixture under a wheel.

While I have illustrated and described my invention with some degree of particularity, I realize that in practice various alterations therein may be made. I therefore reserve the right and privilege of changing the form of the. details and construction or otherwise altering the arrangement of the correlated parts without departing from the spirit of the invention or the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:

1. In a diamond holder for form dressing grinding wheels, a support arm swingably mounted for swinging movement relative toa wheel which is to be dressed, a diamond holder mounted on and movable with said arm, a diamond carried by said holder and having a wheel dressing extremity projecting away from the holder for presentation against a wheel which is to be dressed, a gaging heel carried by, said holder and spaced to one side of the diamond thereon, said support arm having a gaging surface lying in a plane paralleling' the axis about which the support arm is swingable, and said gaging heel having a gaging surface facing away from the holder and at a common level with the wheel dressing extremity oi the diamond in a plane paralleling the other said plane whereby a gaging means can be applied to. thegaging surface of the support arm and the gaging surface ofrthe heel so that by determining the spacing of saidgaging surfaces the accuracy of the degree of projection of the wheel dressing extremity of the diamond can be gaged without direct contact of the gaging means with the dressing extremity of the diamond.

2. Apparatus as defined in claim 1 in which the diamond holder is adjustably mounted on the support arm to enable variation of the degree of projection of the wheel dressing extremity of the diamond from said support arm, and wherein the gaging heel is adjustably mounted on the diamond holder to enable variation in the degree of projection of the gaging surface of said heel to compensate for Wearing of the wheel dressing extremity of the diamond.

3. Apparatus as defined in claim 1 in which the diamond holder is adjustably mounted on the support arm to enable variation of the degree of projection of the dressing extremity of the diamond from said support arm, and wherein the gaging heel is adjustably mounted on the diamond holder to enable variation in the degree of projection'of the gaging surface of said heel to compensate for wearing of the dressing extremity of the diamond, said adjustable mounting 0 Number of the diamond holder comprising a mounting shank slidably received in the support arm and projecting from said holder intermediately of the positions of the diamond and the gaging heel.

4. A Work dressing device comprising a longitudinal mounting shank, an arm carried at one end of the shank and projecting in a direction perpendicular tothe axisfot said shank, a; diamond projecting from the arm in a-directio'n paralleling the axis of said shank, said arm having a bore paralleling the axis of the shank and spaced to one. side of the diamond, a gaging heel having a gaging face facing away from said arm in the direction in'whichjthe diamond projects from said arm and asha'nk adjustably mounted in said bore so that the gaging face can be placed in accurate. alignment with the dressing surface of the diamond.

5. A 'work dressing device as defined in claim 4 in which the mounting shank projects from the arm intermediately of the ends thereof, the diamond being mounted adjacent one end of: said arm, and the gage heel being mounted adjacent. the other end of said arm.

6. A work dressing device comprising a longi-.

tudinal mounting shank, an arm carried at one end of the shank and projecting in a direction perpendicular to the axisof said shank, adiamond and a gaging heel arranged side by-side in spaced relation on the arm and projecting substantially identical distances and in like direction therefrom, that portion of the. arm extending between the shank and the end adjacent which the diamond ismounted having converging and oppositely concaved side portions which will clear a wheel being dressed as the. arm is rocked about an axis generally paralleling a line running. through the length of the arm.

7. A work dressing. device comprisinga longitudinal mounting shank, an arm' carried at one.

end of the shank and projecting in a direction perpendicular to the axis of said shank, a diamond and a gaging heel arranged. side by side.

in spaced relation on the arm and. projecting substantially identical distances and in. like direction therefrom,"thatfportion of the arm extending between the shank and theend'adjacent which the diamond is mounted having converging and oppositely concaved sideportions which will clear a wheel being dressedasthe arm. isrocked about an axis generallylparallelingL aline running through the length of thearm, and the gaging heel being rigidly supported in position for being intersected by the axis of the shank.

WALTER MUENCH.

REFERENGES CITED UNI-TED STATES-PATENTS.

Name Date. Hanson May 25, 1926 Number Greig June .12, 1945 Thompson J uly.16,:19,46. Machemov .Nov. 19, 1946 FOREIGN PATENTS Country. Date 475,096 554,875

Great Britain July 22 1943 Winter July 2, 1935 Parker .Aug. 23, 1938- Great Britain, Nov. 8,1937-

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