US1320752A - Edward b - Google Patents

Description

E. B. GARDNER.

' WHEEL DRESSING MEANS FOR GRINDING MACHINES.

APPLICATION FILED FEB. 20. 1919.

1,320,752. Patented Nov. 4, 1919.

2 SHEETS-SHEET 1- E. B. GARDNER. WHEEL DRESSING MEANS FOR GRINDING MACHINES.

APPLICATION FILED FEB. 20.1919.

Patented NOV-4, 1919. 2 SHEETSSHIZET 2.

IIIIIIIIIIIIIII I EDWARD B. GARDNER, 0F BELOIT, WISCONSIN, ASSIGNOR TO BADGER TOOL COMPANY,

' OF BELOIT, WISCONSIN, A CORPORATION OF WISCONSIN.

WHEEL-DRESSING MEANS FOR GRINDING-MACHINES.

Specification of Letters Patent.

Patented Nov. 4, 1919.

Original application filed- September 21, 1918, Serial No. 255,022. Divided and this application fil ed February 20, 1919., seim No. 278,227.

To all whom it may concern:

Be it known that I, EDWARD B. GAR R, a citizen of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Wheel- Dressing Means for Grinding-Machines, of which the following is a speclfication. I i

This invention relates to the art of grind ing machines, and the general object'of the inventidn is to providean improved work table and means thereon for dressing the grinding wheel.

A special object is to provide a, wheel dressing device which is small and compact, andtoprovide means for mounting the device on the work table in such a way that 'the. device may remain on the work table at all times ready for use,and yet will not interfere with the attaching of the work to the grinding table or with the grinding operation.

.In theaccompanying drawings Figure 1 is a side elevation view of so much of a grinding machine as is necessary to an understanding of my invention. Fig. 2 is a sectional plan view through the work table taken in the plane of line'2T2 of Fig. 3.

Fig. 3 is a rear end elevation of the table with certain stop devices sectioned away. Figs. 4, 5. and 6 are, respectively, a plan view, and inner and outer. side elevations, of the wheel dresser demounted.

The exemplary machine to which I have hereinshown the invention as applied is of the type known eg a disk or ring wheel grinder. Briefly described, the machine comprises a body, of which a fragment is indicated at 11, and a grinding wheel 12 fixed on the. end of a shaft, not shown, which is revolubly mounted in the body. A bar 13 projects from the body beneath the grindwheel and constitutes the means on which the work support asa whole is mounted. A rocker boxld is mounted; on: the bar 13, and has a slot or groove in which anup? right bar. 15 is slidabl -mounted, the bar ii e ng d in di..e nt PQ tionsby means of set screws 16 to support the work table at dilferent elevations. A counterweight 17 is fixed to the lower end of a rod l7 which-is fixed to and depends from a sleeve portion of the rocker box 14:.

The work table comprises a base or sup port 18 having a downwardly extending lug 19 overlapping a portion of the upper end of the bar 15, being pivoted at 20 thereto I and having an arcuate slot 21 through which passes a screw or bolt 22 that is seated in the bar for clamping the parts together in any desired position of angular adjustment.

The work-table further comprises a table top 23 slidably mounted on the support 18 to move toward and away from the grinding wheel 12. Any desired means may be employed for sliding the table top 23,

that herein shown comprising a shaft 28 having a crank 27 fixed on its upper end, the free end of which crank is connected by a link 26 to the table top, said crank and link lying between said top and the support 18. On the lower end of the shaft 28 is fixed a hand lever 29. A stop screw 45 mounted in the table top. 23 is arranged to abut against the base 18 of the table to, limit the motion of the table top 23 toward the grinding wheel 12. A rod 46 seated in the base 18 and passing slidably through the end'of the table top carries a stop 47'to limit the motion of the table top away from the grindingwheel. This means for sliding the table top forms the subject matter of my copendingv application for patent, Serial No. 255,022, filed September 21, 1918, of which this application is a division.

The work to be ground is fixed to the upper face of the table top by any suitable means such as bolts 24, the heads of which engage in undercut slots 25 in the table top.

The wheel dressing means is mounted on the slidable table top in a position beneath to a position projecting beyond the fOI-f.

wardend of the table top or a position rearward from such forward end. The piece of tion of dressing work which is secured to the table top by means of the bolts 24 isfrequently of such size that it projects beyond the side edges of the table top and for this reason the wheel dresser is attached beneath the plane of the top face where it will not, at any time, interfere with the WOIl-T and always be ready for use. 7 q I a While the wheel dressing member may be of any one ofthe well-known types, I have herein shown it as consisting of a roller ,to contact with the grinding wheel,

although it should be understood that the 7 pin or screw 44: seated in the spaced arms of the bracket. 7 e

The wheel dresser may be mounted in different positions on the table top so long as :11? lskept beneath the plane'of the upper face thereof, but I have found it most con-v Venient to attach the device to one of the vertical side faces of the table top. The preferred manner of attachment is to provide the table top'with an undercut slot 39, and to providethe' bracket 40 with 'a rib 42 to enter the narrow portion of said slot, the bracket being adjustably attached to the table top by means of a bolt 43 passing through a hole in the bracket and having its head engaging in the wider part of the slot 39, the bolt having a nut on its'outer end for clamping the bracket in any desired position onthe table top.- I

en. the a grinding wheel 12 is to be dressed the dressing device issecured in the position shown in Fig. 2 so that the dresser wheelprojects beyondthe end of the table top. "The hand lever 29 is then moved toward the'grinding wheel to press the dresser roller with the desired degree of force against the grinding wheel. The wheel dressermaybe caused to pass approximately radially across. the face of the grinding Wheel by swinging the work table back and I forth on the supporting bar 13 as an axis, so that all points on the grinding wheel will be dressed.

When not in use the wheel dresser is secured in a -position rearwardfromthe front end of the table, in which position the device will not, in anyway, interfere with the securing of a piece of work on the tabletop yet will.

top face.

even though the work project beyond the edges of the table, because the device is located beneath the plane of the upper face of the table top 28. The wheel dresser is also of small dimensions so that it is not in the way during the grinding operation.

The particular details ofconstruction of my invention have been herein described for the sake of lucidity only and not with any intention of limiting the invention to the exact structure disclosed. The scope of the invention is pointed out in the appended claims. 4 I, {I claim as my invention: i1

li A work table for grinding machines equipped with means for securing a piece of work to the top face ofthe table, in combination-with a wheel dresser, and means for adjustably securing said wheel dresser to the work table in a plane beneath said 2. A work table for grinding machines equipped with means for securing a piece of work to the top 'face 'ofthe table, in com bination with a wheel dresser, and means for adjustably securing said wheeldresser to one of table. i V V 3. A work table for grinding machines equipped with means for securing apiece of work to the top face of the tableand having a horizontal slot located ina plane beneath said top face, in combination with a,

wheel dresser and means to engage in said the upright side faces of the work slot for securing the wheel dresser to the 7 table, said wheel dresser being adjustable along's aid slot to'project beyond the front end of the table so as to engage the grinding wheel or to occupy a position rearward from the front end of the table. 0

4;. Aework table having an undercut slot therein, and a. wheel dresser device having a bolt to engage in said slot for clamping the device to the table,fsaid device lying below the plane of the top of the table; I

'5. A work table having, in combination,

a wheel dresser, and means for adjustably fixing said dresser to one side of the table.

6. A work table having an undercut slot therein, a bracket carrying a wheel dressing roller, means on said bracket engaging said slot to permit sliding of said bracket and prevent rotation thereof, a bolt passing through said bracket and having a head engaging in the undercut portion of the slot, and a nut. on the outer end of said bolt arranged to clamp said bracket in difierent positions on the table, said bracket and wheel occupying a position beneath the upper face ofthe table. i r 7. A worktable having, incombination, a support," a table ,top slidably mounted thereon, means for'moving said.top,.and a wheel dresser adju'stab'ly' fixed to one side of said table top in .a plane beneath the dresser adjustably mounted on one face of upper face of said top. the table top in such position that it does 8. A Work table having, in combination, not interfere With the clamping of the Work 10 a support, a table top slidably mounted on the table top. 5 thereon, means for moving said top, the top In testimony whereof, I have hereunto set having means on its upper face to permit my hand. of clamping the Work thereto, and. a Wheel EDWARD B. GARDNER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

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