US1512608A

US1512608A - Dressing attachment for grinding machines

Info

Publication number: US1512608A
Application number: US479030A
Authority: US
Inventors: Knowles Carroll
Original assignee: Pratt and Whitney Co Inc
Current assignee: Pratt and Whitney Co Inc
Priority date: 1921-06-20
Filing date: 1921-06-20
Publication date: 1924-10-21
Anticipated expiration: 1941-10-21

Description

Oct. 21 1924.

C. KNOWLES DRESSING ATTACHMENT FOR GRINDING MACHINES Filed June 20. 1921 Swoon-)Coz Patente ct. 2i, Wd..

UNITED STTES PATENT CARROLL KNOWLES, 0F HARTFORD, CONNECTICUT, ASSIGNOR, TO PRATT & WHITNEY COMPANY, O'F NEW YORK, N. Y., A CORPORATION 0F NEW JERSEY.

DRESSING TTACHMENT FOR GRINDING MACHINES.

Application iled June 20, 1921.

To all whom t may concern:

Be it known that I, CARROLL .KNowLEs, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Im rovements in Dressing Attachments for rinding Machines, of which the following is a specification.

This invention relates to dressing attachments for a grinding or abrasive wheel and in particular to dressing attachments for a grinding wheel which is adapted to contact with the work on one of its lateral surfaces.

One of the objects of the present invention is to provide devices to dress two surfaces of an abrasive wheel, one of the surfaces being that which engages the work and the other surface one at an angle to the first surface. One of the features of the invention is to accurately dress ott' a lateral work-engaging surface of an abrasive wheel to present a new and clean surface to the work, and also to dress off the outer periphery of the wheel so that the lateral work-engaging surface is accurate and true up to the outer periphery of the wheel.

Another feature of the invention that is advantageous is that the axes of the dressing attachments are in fixed position, and at right angles to each other, one being normal to the axis about which the abrasive wheel rotates and the other one parallel to the wheel axis. Still another feature of the invention is that the dressing attachments are applied directlyto parts of the wheel mounting and in positions so that they may be readil placed in operative position or removedi With these and other objects in view, my invention consists in the features of construction and operation set forth in the following specification and illustrated in the accompanying drawing.

ln the accompanying drawing annexed hereto and forming a part of this specification, I have shown my invention embodied in a dressing attachment for a cutter grinding machine but it will be understood that the drawing is not to be construed as deining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose,

Serial No. 479,030.

i ln the drawing:

Figure l shows a front elevation partly in section of a grinding wheel with the dressing attachments in position for operation.

Fig. 2 is a side elevation in section with the wheel partly broken away to more clearly show some of the parts.

Briefly, my invent-ion in its broadest aspect comprises: first, a dressin, attachment which may be mounted on a xed part of the grinding machine in a position to dress off the outer periphery of the wheel; 'and second, a dressing attachment adapted to be mounted in fixed position relative to the grinding machine to dress off one of the work-engaging lateral surfaces of the grinding wheel.

Referring more in detail to the figures of the drawing, at 10 is shown a grindin or abrasive wheel mounted at the forwar end of a spindle ll. The spindle 1l is r0- tatably mounted in bearings 12 provided in a wheel head 13. At 14 is shown a pulley by means of which the spindle 11 and the wheel l() ma be rotated. Surrounding the wheel 10 and7 enclosing a portion of its periphery is a housing 18 which may be formed as a part of the wheel head 13 or may be secured in any convenient way to the wheel head 13.

The upper portion of the housing 18 is formed into a vertical projection 20 and is preferably bored therethrough as shown at 22. This projection 2() forms the support and also the positioning means for oneof the dressing attachments which will now be described. As shown in F ig. l, the axis of this bore 22 is normal to the axis of the wheel.

A sleeve 30 adapted to be fitted within the hole 22 bored in the projection 20 is provided with a bushing 32 through which eX- tends a rod 34, which, at its lower end, is enlarged `in diameter as shown at 35. The lower end of the 10d 34 is provided With a head 36 preferably formed integrally with the rod 34.. Eccentrically mounted within the head 36 and depending from its lower surface is a dressing tool. In the present instance this takes the form of a diamond 39 mounted in a short sleeve 40 suitably fastened into the head 36. in order to aotuate the rod 34 and consequently to oscillate the diamond 39 across 'the periphery of the Wheel 10, a handle 42 is made fast to the bushing 32 at its upper end so that oscillation of `handle 42 oscillates the diamondy 39 simultaneously therewith.

As shown in Fig. 2, the handle 42 is inserted in a collar 44 surrounding the sleeve 32, the collar 44 being fastened to the sleeve 32 by means of a pointed screw 46 threaded into the collar 44 and engaging a depression in the bushing 32.

The rod 34 and consequently the diamond 39 is moved with oscillations of, the handle 42 and bushing 32 by means of akey 48 in serted in part 35 of rod 34 and engaging a lon itudinal spline 49 formed in the inner surIae/e of the bushing 32. The rod 34 therefore turns with the bushing 32 but may move longitudinally relative thereto.

In order to adjust the diamond 39 vertically Within bushing 32, in a direction parallel to the sleeve 30, a screw 50 having a knurled head 52 is provided surrounding the u per end of the rod 34 and threaded into die bushing or sleeve 32. Rotation of the screw 50 by means of the head 52 forces the 4diamond 39 further from the lower end of the bushing 32. Surrounding the head 52 are suitable graduations 54 so that with the aid of the scale 56 mounted on the upper surface of collar 44 the adjustment of the diamond may be readily determined.

The rod 34 is provided with a small collar 60- suitably fastened in place as by means of a pin 62. Against this collar 60 a spring 64 enclosed within the bushing 32 continually presses, thus forcing theJ rod 34 upward relative to bushing 32. By means of this spring the rod 34 is held up against the adjusting screw 50. As the collar 60 must be fastened to the rod 34 after the rod 34 and spring64 are placed in position a transverse hole is bored through the sleeve 32 as-shown at 63. This permits the pin 62 to be driven in place after the spring 64 and collar 60 have been placed in position.

In dressing off the periphery of the wheel 10 the sleeve 30 is first inserted within the projection 20 and is moved downward until the diamond 39 is almost in contact with the outer periphery of the wheel. At that oint a collar 61 is positioned in contact with) the upper surface of the projection 20 and is fastened in adjusted position on' the sleeve 3() by means of the screw 65. The collar 61 may then be left in adjusted position and not changed until the outer surface of the abrasive wheel 10 has worn sufficiently to require the sleeve 30 to be fed downward beyond the range of adjustment of the screw 50.

Vith the sleeve 30 thus located the rod 34 and diamond 39 are moved downward by rotation of the screw 50. Then, with the diamond 39 in adjusted position, oscillation of the handle 42 will canse the diamond to transverse the entire width of the outer periphery of the wheel 10, thus resurfacmg this part of the wheel.

In order to temporarily hold the sleeve 30 in adjusted position and to prevent vibration, a screw 66 is provided in the projection 20 and may be tightened about the sleeve 30. I preferably also provide a spline 67 cut into and extending the entire length of the sleeve 30 so that the sleeve 30 wlll always be placed in its correct position rela-tive to the wheel 10 and the diamond will properly traverse the entire outer periphery ot the wheel 10. This spline 67 is engaged by the inner end of screw 66. To remove the attachment. fromits operative position it is only necessary to loosen the screw 66 and withdraw the sleeve 30 and with its component parts from the projection 20.

Coming now to a description of the dressing attachment for the lateral work-enga ing surface of the wheel 10, this attac ment comprises a bar 1.00 on which is mounted an arm 102. The bar 100 also has n. positioning collar 103 which may be fastened thereto by a pin 101. As shown in Fi 1, the axis of bar 100 lies normal to the p ane of the wheel 10 and also normal to the axis of sleeve 30.

This attachment is adapted to be mounted on suitable projections 104 provided adj acent thel grinding wheel 10 on the wheel head 13. These projections 104 are provided near their outer ends with Vslots 105 in which the bar 100 is adapted to rest. The collar 103 rests against one side of one of the projections 1071 and serves to hold the bar 100 in position.

The arm 102 is provided at its outer or Jfree end with an adjusting screw 110 having at one end a kuurled head 112 on which graduations 1,13 are provided. The graduations 113 in connection with a scale 114 secured to the arm 102 determine the adjustH ment oi screw 110.

Inserted in the forward end of the screw 110 is the dressing tool. This, in the form shown, comprises a diamond 117 set centrally and longitudinally in a small sleeve 116 as shown.

IVith the attachment in position as shown il is onlyv necessary to rotate the knurled head 112 of screw 110 until the diamond 11T is in contact with the wheel 10. As soon as this takes place the arm 102 may be oscillated about the. axis of the bar 100 which is parallel to the axis of the wheel. 10 so that the diamond 117 may traverse the work engaging lateral surface of the wheel.

Vo frirtionally hold lthe screw 110 in any adjusted position a small shoe 120 is pro vided in the arm 102 pressed against the sido of screw 110 by means of a light spring 121.

p is accurate up tothe outer periphery of the wheel, and, also, the outer periphery may be dressedto a predetermined size.

What I claim 1s: c

y1. A dressing attachment for abrasive wheels comprising in combination, a sleeve adapted to fit into a portion of the wheel.

mounting, a rod within said sleeve, means: to adjust said rod relative to said sleeve, and a dressing 'tool mounted eccentrically on said rod, whereby oscillation of said rod will traverse said dressing tool across a surface of said abrasive wheel.

2; A dressing attachment for abrasive wheels comprising(v in combination, a sleeve adapted to it into a'portion of the wheel mounting, a rod within said sleeve, means to adjust said rod longitudinally relative to said sleeve, and a :dressing tool mounted eccentrically on said rod, whereby oscillation of said rod 'will traverse said dressingtool across a surface of said `abrasive wheel.

3. A dressing attachment 4for abrasive wheels comprising in combination, a sleeve adapted to lit into a portion of the wheel mounting, a rod within said sleeve, means to adjust said rod relative to said sleeve, and a dressing tool mounted eccentrically at one end of said rod, whereby oscillation of said rod will traverse said dressing tool across a surface of said abrasive wheel.

4. A dressing attachment for abrasive wheels comprising in combination, a sleeve adapted to tit into a portion of fthe wheel mounting, a rod within said sleeve, means to adjust said rod to a predetermined position relative to said sleeve, and a dressing tool mounted eccentrically on said rod, whereby oscillation of said rod will transverse said dressing tool across a surface of said abrasive wheel. y

5. A dressing attachment for abrasive wheels comprising in combination, a sleeve adapted to fit into a portion of the wheel mounting, a rod within said sleeve, means to longitudinally adjust said rod to a predetermined position re ative to said sleeve, and a dresing tool mounted eccentrically at one end of said rod, whereby oscillation of said rod will traverse said dressin toolacross a surface of said abrasive whee 6. A grinding machine comprising in com bination, a wheel mounting, an abrasive wheel rotatably mounted therein, ,and a dressing attachment for said wheel, said dressin attachment comprising a sleeve adapte to be attached to said wheelmounting, a rod movable axially therein and a dressing tool on said rod, whereby oscillation of said rod will traverse said dressing tool across a surface of said abrasive wheel in different adjusted positions. v

7. A grinding machine comprising in combination, a wheel mounting, an abrasive wheel rotatably mounted therein and a dressing attachment for said wheel, said dressin attachment comprisin a sleeve adapted rto be attached in a pre etermined adjusted position to said wheel mounting, a rod therein and,a dressing tool on said rod,

whereby oscillation of said rod will traverse said dressing tool across a surface of said abrasive wheel.

8. A grinding machine comprising in combination, a wheel mounting, an abrasive wheel rotatably mounted therein, and a dressing' attachment for said wheel, said dressing attachment comprising a sleeve adapted to be attached to said wheel mounting, a rod therein, means to adjust said rod axially relative to said sleeve, and a dressin tool lon said rod, whereby oscillation of said rod will traverse said dressino` tool across a surface of said abrasive wheel.

9. A grinding machine comprising in combination, a wheel mounting, an abrasive wheel rotatably mounted therein, and a dressing attachment for said wheel, said dressin attachment comprising a sleeve adapte to be attached in a predetermined adjusted position to said wheel mounting, a rod therein, means to adjust said rod relative to said sleeve, anda dressing tool on said rod, whereby oscillation of said rod will traverse said dressing tool across a surface of said abrasive wheel.

10. A grinding machine comprising in combination, a wheel mounting, an abrasive wheel rotatably mounted therein, and a dressing attachment for said wheel, said dressin attachment comprising a` sleeve adapte to be attached in a predetermined adjusted position to said wheel mounting, a rod therein and a dressing tool mounted eccentrically on one end of said rod, whereby oscillation `of said rod will traverse said dressing tool across the surface of said abrasive wheel.

In testimony whereof, I hereto aiix; my

signature.

CARROLL KNOWLES.

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