US1402215A - Grinding machine - Google Patents

Description

W..C. CORYELL.

GRINDING MACHINE. I

1,492,215, I I Patented Jan. 3, 1922 2 SHEETS-SHEET l.

mmv a k ,I 1' 1 I L 11 19" 12 4 46 I Ill W. C. CORYELL.

GRINDING MACHINE.

APPLICATION FILED Aus.12. 1920.

Patented Jan. 3, 19220 2 SHEETS-SHEET 2- l l l gal-J: I [g]! IIIIIIW To all whom it may concern: I

Be it known that 1, WILLIAM C. 003mm,

a citizen of the United States, residing at Youngstown, in the county of Mahoning, State of Ohio, have invented certain new and useful Improvements in Grinding Ma chines, of which the following is a specification.

The present invention relates to ding machines for the use in dressing the faces or edges of solids of various forms and shapes, whether composed of metal or other material, and whether such dressing be.

chine for working \uponlike objects, in which the dressing wheels are adjustable relatively to the position of the work. In the present case the position of the wheels remains unchanged when once set, but the position of the work is adjustable to va the finish uponit. The-generic claims an the claims of one species are presented in my prior case and the claims to the other species are found in the present case.

The various features and advantages of the form of the invention disclosed herein will be more fully understood upon reference to the following detailed description taken in connection with the accompanying drawin and the scope of the invention will be part1cularly pointed out in the appended claims.-

In said drawings, Fi 1 is a side elevation of a grinding, mac inc constructed in accordance with the resent invention; Fig. 2 is a sectional elevation of one of the dressing wheels and its associated box, the lane of section being indicated by the line A of Fig. 1; Fig. 3 is an end elevation of the indmg machine, illustrating a flexible and passing over the work-guidmg rolls; Fig. 4 is a transverse section of the same taken on a plane indicated by the line B-B of Fig. 1; and Fig. 5 is an elevation of the work carrier. Throughout these views like characters refer to like parts.

Referring to drawings detail, 10

Specification .of Letters Eatent.

Application filed August 12, 1920. Serial No. d03,20.

ed August 27,- 1918, h havedisclosed and claimed a maerence te dqve eilt 33. 'llhe ped a.

Patented Jan. 3, 11-222.

designates the base of the machine. J

tals 13 and 14 which are provided with bearings 15 and 16 respectively. These pedestals are preferably castings having strengthening webs and bases b which they are secured to the web 12 o the machine base by bolts 17 and 18. lhe bearings 15 and 16 are provided for the trunnions 19 and 20 formed at the opposite ends of the carrier frame '21. The latter frame is provided with two pairs of oppositely extending arms 22 and 23. A work engag ng roll 24 is positioned between the arms 22 and. a like roll 25 is positioned between the arms 23. In each instance a shaft passes throu h the rolls and arms so that the rolls are cc to rotate. It will be noted that the trunnions 19 and 20 are ofiset with reference to the center of the frame 21 so as to bring the work, such as the belt 26, into line with the axis of the trunnions. The frame 21 and rolls 24 and 25 which'constitute the work carrier may be oscillated as a whole about the axis of the trunnions. In order to hold the frame 21 in its difi'erently adjusted positions it is provided with an extension or stud 27 which is reduced near its outer end to provide a shoulder in close proximity to a slotted extension 28, extending from the pedestal 14. The reduced portion of the stud 27 constitutes a threaded stud pin 29'which extends through the slot in the extension 28. The outer end of this pin is provided with a washer 30 and nut 31 by which the shoulder upon the stud 27 may be drawn tightly against the extension 28 to hold the carrier in adjusted position.

At a point intermediate of the edestals 13 and 14 the base 10 is also provi ed with a centralpedest'al 32 which 1n the present instance takes the form of a channel iron which is secured to the web 12 of the base at a plurality of points by the bolts 33. The upper e ges of the members forming this channel, support the boxes 34 and 35 I of the dressing wheels 36 and 37. As clearly shown, the dove tail 38 on each of the boxes 34 and 35 passes into the channel of the pedestal 32 and engages the inner inclined .walls 39 near the top of the pedestal.

Transverse bolts 40 passing through the sides of the pedestal .32 serve to draw them together and properly space them with refends 41 and 42 are connected in like manner by a longitudinal bolt 43. 'lhe ends 41 and 42 are provided with bearings 44 and 45 for a lengitudinal screw 46 provided at its opsite ends with hand wheels 47 and 48.

he screw 46 extends through threaded openings in the boxes 34 and 35. One-half of the screw 46 is provided with a righthand thread and the other half is provided with a lefthand thread. Consequently the rotation of the .screw 46 in one direction moves the boxes 34 and 35 towards each other and the turning of the screw in the opposite direction moves these boxes apart. This adjustment of the boxes 34 and 35 results in a like adjustment of the dressing wheels 36 and 37. In the case of box 34,

which is associated with the dressing wheel 36, it will be seen that the box is provided with a transverse bore 49 into which bushings 50 and 51 are fitted for the shaft 52 of the dressing wheel 36. This shaft is reduced in diameter at its opposite ends, in the one case for the reception of the wheel 36 which is retained in place by nut 53, and in the other case for the reception of the pulley wheel 54 which is likewise retained in place by a nut 55. The upper portion of the box is provided with an opening 56 through which a lubricant may be applied to the bearings. The box 35 and associated dressing wheel 37 are similar in construction and need not be particularly described, exce t to say that its pulley wheel is designated 54.

It will be noted that the dressin wheels 36 and 37 overhang the pedesta 32 far enough to bring them in line with the work 26 as it passes from one work engaging roll to the other. In other words, the dressing wheels 36 and 37 are brought into the oscillatory axis of the Work carrier. Not only does this axis intersect the axes of the dressing wheels but it lies in a vertical plane midway between the flanges of the wheels.

The dressing wheels 36 and 37 are curved concavely so as to provide a surface which willengage the edge of the work so as to round it 0d. The particular surface upon the wheel for accomplishing this is preferably conoidal and may be a hyperboloid of revolution such as described more fully in my prior application Serial No. 251,634. With wheels having, such work engaging surfaces it will be seen that a slight oscillation of the carrier frame 21 will result in applying the work to the wheels at a different angle which will considerably vary the curvature of the out upon the work. This matter has been gone into quite fully in my aforesaid application Serial No.-251,634-and need not be repeated in the present case.

In operation, the dressing wheels 36 and 37 are driven by belts 58 and 59 traveling over driving pulleys 60 and 61 and pulleys 54 and 57 respectively. These belts are driven so as to move the wheels 36 and 37 in opposite The dressing wheels 36 and 37 not be driven until the work has been put in place. In case a flexible belt, such as 26, is to have its edge dressed, it will be placed over the carrier rolls 24 and 25 as illustrated. Then the dressing wheels will be adjusted by means of the screw 46 until the surface of the wheels engage the edges of the work. Then the belt 26, which is herewith illustrated as an endless belt, will be set in correct posithus enable the belt 26 to be removed from the machine. Where an endless belt is worked upon, it will be necessary to lift the carrier frame out of its bearings 15 and 16 in order to remove the belt from the carrier. Where the solid is flexible and is wound oil? of one spindle and on to another this will not be necessary. Various applications of the machine to different classes of work will suggest themselves to those skilled in the art.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine for dressing a solid, including grooved dressing wheels having parallel axes, said wheels being positioned so as to engage opposite portions of said solid, workengaging means for guiding said solid between said wheels in a plane at an oblique angle to the plane of the axes of said wheels, and means for adjusting said work-engaging means to vary th angle between said planes.

2. A machine for dressing a solid, including rolls arranged to guide the solid in a plane, a dressing wheel located in said plane intermediate of said rolls and having a dressing surface shaped so as to present different ortions to said solid according to the angu ar position of said wheel relative to said plane, and means for adjusting said rolls relative to said dressing wheel to vary the angular position of said plane relative to said wheel.

3. A machine for dressing a solid, including guide rolls to guide said solid in a plane, a grooved dressing wheel in said plane and operative to dress said solid at a point intermediate of said rolls, the axis of said wheel being oblique to said first mentioned plane, and means foradjusting said guide rolls to vary the angle between said first mentioned plane and the axis of said dressing wheel.

I 4. A machin for dressing a solid, including means for feeding said 'solid in a right,

line, a dressing wheel positioned-so as to engage said solid, the engaging fac of said wheel being concave and operative to produce a cylindrical surface on said solid, and -means for adjusting said feeding means to exten s at an angle to the plane of feed, and

means for adjusting said feeding means to vary the angle between said plane and said axis of rotation.

Mtery axis of sai 6. A machine of the character described, including a base, boxes movable toward and from each other on "said base, dressing wheels journaled in said, boxes, work guiding rolls, and a frame for said rolls mounted for oscillatory adjustment, the axes of said wheels bein intersected by the oscillaframe.

7. A machine of the character described, including a base, boxes movable toward and from each other on said base, a work controlling carrier mounted for oscillatory adjustment on said base co-operating parts on said base and carrier and associated means for establishing any desired oscillatory adjustment, means for securing said boxes in desired adjusted positions on said base, and dressing wheels journaled in said boxes and extending beyond the same, the axes of said wheels being intersected by the oscillatory axis of said carrier.

8. A machine for dresing a solid, including grooved dressing wheels having axes lying in parallel planes, means for guiding said solid with opposite portions in engagement with said wheels in a feed plane at right angles to said parallel lanes and at an oblique angle to the axis 0 each of said wheels, and means for adjusting said guiding means to shift said feed plane to vary the obliquity between said feed plane and the axes of said wheels.

9. A machine for dressing a solid, includincluding a base, pedestals extending upward from said base and provided with bearin a work guiding frame journaled in sai vbearings, a pair of work-engaging rolls journaled in said frame, means for adjusting said frame about its axis and securingthe same in adjusted position, and dressing means positioned in said axis and having a curved dressing face operative to provide surfaces of difi'erent curvature upon the work in accordance with the different adjustments of said frame.

11. A machine for dressing a solid, comprising a work carrying frame and dressing wheel and shaft, the work carrying frame being swiveled about a line passing through the central plane of the wheel and intersecting the axis of the wheel at right angles.

12. A machine for dressing a solid, including means for feeding said solid in a plane, and means for adjusting said feeding means about an oscillatory axis to vary the position of the plane of feed, dressing wheels for en aging said solid, the engaging faces of said wheels being concave and operative to produce cylindrical surfaces on said solid, and the plane of the axes of said wheels being perpendicular to vertical planes throu h said axes and oblique to said plane of fee .7

13. A machine of the character described,

including a base, boxes movable toward and from each other on said base, dressing a WILLIAM C. CORYELL.

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