US2402945A

US2402945A - Grinding wheel dressing device

Info

Publication number: US2402945A
Application number: US520913A
Authority: US
Inventors: Brocker Emil
Original assignee: SUPER TOOL Co
Current assignee: SUPER TOOL Co
Priority date: 1944-02-03
Filing date: 1944-02-03
Publication date: 1946-07-02
Anticipated expiration: 1963-07-02

Description

my, H6. E, BRQCKER' 2,402,945

I GRINDING WHEEL DRESSING- DEVICE Filed Feb. s, 1944 a sheets-sheet 1 l frown/EVS.

Fuy 2, i946, Y y l l E. BRocKER GRINDINGV WHEEL DRESSING DEVICE Filed Feb. 5. 1944* 2 sheets-sheet 2 Patented July 2, 1946 GRINDING WHEEL DRESSING DEVICE Emil Brooker, Van Dyke, Mich., assignor to Super Tool Company, Warren Township, Macomb County, Mich., a partnership Application February 3, 1944, Serial No. 520,913

This invention relates to grinding wheel dressing devices and particularly to a dressing device which is remotely operated and adjustable to dress a surface on the grinding wheel which is disposed parallel or at an angle to the axis of the grinding wheel,

Difficulty has always been experienced when dressing a surface on the face of a grinding wheel which is disposed at an angle to the grinding wheel axis. Devices are provided in the trade for grinding such angularly disposed faces but these all require manual manipulation of the dressing diamond, which often resulted in serious accidents to the fingers of the operator. The present invention embodies mechanical means for operating the dressing diamond which is located at a point remote from the face of the wheel so that the fingers of the operator never approach the wheel face.

The diamond is mounted on a block which is adjustable on a carriage to a forward, rearward or interjacent position. The carriage is mounted on a dial plate which is angularly adjustable t a desired position by means of a dial scale. One or more gears are provided within the platek for operating a rack secured to the under side of the carriage. The gears are driven through a pair of bevel gears from a shaft having a knob which is grasped by the hand of the operator and rotated to produce the longitudinal movement of the carriage. The carriage is moved at the angie procured by the adjustment of the dial plate at a point remote from the position of the knob.

Accordingly, the main objects of the invention are; to provide a dressing device for the face of a wheel which is remotely operated for passing a dressing tool across the wheel face; to provide a dressing diamond on a carriage which is adjustable to any angular position relative to the horizontal and operated along its longitudinal axis through the manipulation of a shaft remotely disposed to the carriage; to mount a dial plate on a shaft which may be adjusted and clamped in predetermined position having a gear in engagement with a rack on a carriage supporting a diamond dressing tool which is moved longitudinally with the carriage through the operation of the gear from a remote point; and in general to provide a device for dressing the surface of a grinding wheel parallel or at an angle to the axis of the wheel, which is simple in construction, positive in operation, and economical of manufacture.

Other objects and features of novelty of this invention will be specifically pointed out or will 2 Claims. (Cl. 125--11) become apparent when referring, for a better understanding of the invention, to the following description taken in conjunction with the accompanying drawings wherein,

Figure l is a perspective View of a grinding wheel dressing device embodying features of this invention;

Fig. 2 is an enlarged sectional view of the structure illustrated in Fig. l, taken on the line 2 2 thereof; A

Fig. 3 is a sectional view of the structure illustrated in Fig. 2J taken on the line 3 3 thereof;

Fig. 4 is a sectional View of the structure illustrated in Fig. 3, taken on the line d l thereof; Fig. 5 is a top plan view of the structure illustrated in Fig. 4 as viewed from lines 5 5 thereof and Fig. 6 is a broken side view of the structure illustrated in Fig. 1 in position to dress the surface of a grinding wheel.

The dressing device embodies an L-shaped element having a base portion IU and a vertically disposed portion II at one edge provided in unit relation as illustrated in the figures, or which maybe separate elements secured together in a suitable manner. The portion I I contains an aperture I2 through which a shaft I3 is journaled, having a conical bearing element It supported on the end by a nut I 5. The conical bearing element Ill engages a conical aperture I5 in the portion I I and provides a predetermined amount of friction to the rotation of the shaft.

The shaft portion Il extending from the opposite side of the portion II is press tted into a dial plate I8 which rotates the shaft when the plate is turned. The plate has a top fiat surface 'I9' disposed as a chord of the arc of the plate having a gib 2| machined along one of its edges. A carriage 22 has a dovetailed element 23 secured thereto by a plurality of screws 24. A rack 25 is secured to the under side of the dovetailed element 23` by a plurality of screws 26. A reduced portion 21 extends forwardly of the shaft Il in position to receive a gear 28, the teeth of which are in mesh with the teeth of the rack 25.

A pinion gear 29 is disposed in mesh With the gear 28 and is secured on a bolt 3l and to a beveled gear 32 by a nut 33. The beveled gear has a tubular extending portion 34 which may be an integral part of the beveled gear 32, as illustrated, or which may be a separate element. The tubular portion 34 forms a bearing surface with the wall of the aperture 35 through the vertical portion II. A pin 30 extends in the end of the tubular portion and in the gear to prevent their 3 relative movement. An arcuate slot 36 is provided through the dial plate I8 through which the tubular element 34 extends and permits the plate to be adjusted about its center without interference.

A gib 4I is secured to the outer face of the plate I8 along the top flat surface I9 by a plurality of screws 42. A shim 43 is disposed between the gib and the outer surface of the doveta1 element 23 against which it is adjusted by a plurality of screws 44 which are retained in adjusted position by nuts 45. Any wear which occurs between the gibs and the dovetail element is taken up by the adjustment of the screws 44v which operate to apply predetermined pressure to the shim 43, the dovetail element and the gib 2|. A dial scale 46 is provided on the outer face of the vertical portion Il Ybeyond the area of the plate I8, as clearly illustrated in Figs. 1 and 2. A clamping screw 41 is threaded into the edge of the portion II in engagement with a bar 48 as illustrated in Fig. 4. The bar is made of brass or similar soft metal so as not to damage the outer surface of the conical element i5.

When the angle of the carriage 22 is to be adjusted, the screw 41 is loosened and the plate I8 is grasped by the operator and moved about its center until adjusted to the angular position desired. Thereafter the screw 41 is turned to clamp the conical element I and the plate I8 in xed position. The carriage 22, as illustrated in Fig. 3, is provided with an arcuate recess 49 which receives a. portion of a round bar 5I which is secured in position by the plurality of bolts 24. A tool holding element 52 has an arcuate aperture 53 which receives the projecting portion of the rod 5I over which the element may be adjusted and secured by a screw 54. A diamond dressing tool 55 is secured on the outer face of the element 52 by a screw 5B.

A cover 51 is secured to the outer face of the plate I8 by a plurality of screws 58. A downwardly projecting guard plate 59 is secured to the carriage along the outer side by screws 6I. A similar guard plate 62 is provided at the rear and front ends of the carriage secured in position by similar screws 6I. An arcuate guard plate 63 is mounted on the top of the vertical portion I I adjacent to the inner surface of the dial plate I8 to cover the aperture 36 when the plate is tilted and for preventing the abrading particles from damaging the gib 2l and the under side of the carriage 22.

The beveled gear 32 is disposed in meshed relation with a beveled gear 60 that is mounted on a rod 14 in a bearing sleeve 69 secured to a, block 13 which is attached to the base portion III by screws 64. The rod is secured to the gear 60 by a nut 15 and an operating knob 65 is securedY to its opposite end by a screw 66. A shield '61 is mounted over the

gears

32 and 60, being secured in position by a plurality of screws 68. In Fig. 6, a grinding wheel 10 is illustrated, having an angularly disposed face 1I dressed thereon by the diamond tool 55 when the carriage 22 is advanced forwardly and backwardly along its longitudinal dimension.

When such a surface is to be dressed on a grinding wheel, the screw 41 is first loosened and the plate I8 is adjusted until the carriage 22 is `disposed. at the desired angle as read from the scale 46. The screw 41 is then tightened and the tool holding element 52 may then be adjusted to a forward, rearward or other position on the rod 5I, depending upon the position of the base portion I8 relative to the position of the grinding wheel. Thereafter the knob 65 is rotated to operate the pinion 29 through the pair of

bevel gears

32 and 60 to drive the gear 28 and advance and retract the rack and the carriage 22 along their longitudinal dimensions. This reciprocates the diamond dressing tool 55 at a desired angle back and forth across the face 1I of the grinding wheel to dress the face to the desired angle. This is accomplished by the operator at a point remote from the grinding wheel and the dressing tool, and the hazards attending such a dressing operation are thereby eliminated.

What is claimed is:

l. In a grinding wheel dressing device, a, base support, a horizontal shaft mounted thereon, a dial plate mounted on said shaft for adjustment about the axis of the shaft in a vertical plane, a gear on said shaft, a carriage on said plate having a rack in engagement with said gear when mounted for movement on a tangent to a circle about said axis, a second shaft mounted on said base support and extending through an arcuate slot in said plate, a gear on said second shaft in driving engagement with said first gear, and means for clamping said plate to said support for retaining it in adjusted position with the carriage tilted at a desirable angle relative toa horizontal plane.

2. In a grinding wheel dressing device, a base support, a horizontal shaft mounted thereon, a dial plate mounted on said shaft for adjustment about the axis of said shaft in a vertical plane, a gear on said shaft, a carriage on said plate having a rack in engagement with said gear when mounted for movement on a tangent to a circle about said axis, a second shaft mounted on said base support and extending through an arcuate slot in said plate, a gear on said second shaft in driving engagement with said first gear, means for clamping said plate to said support for retaining it in adjusted position with the carriage tilted at a desirable angle relative to a horizontal plane, and means by which said second shaft is operated remotely from the plate for shifting said carriage on a tangent to said circle.

EMIL BROCKER.