US1336731A - Machine for cutting bevels - Google Patents

Description

. P. CURRY.

MACHINE FOR CUTTING BEVELS. APPLICATION FILED JULY 5,1919.

Patented Apr. 13, 1920.

2 SHEETS-SHEET 1.

A TTORNEY.-

W. P. CURRY.

MACHIINE FOR CUTTING BEVELS. [APPLICATION FILED JULY 5.1919.

1,336,731. Patented Apr. 13, 1920.

2 SHEETS-SHEET 2- I l l I l i l I l I I INVENTOR.

W/Y/lam PCur-ry ATTORNEY.

UNITED STATES PATENT OFFICE.

WILLIAM P. CURRY, OF SYRACUSE, NET/V YORK.

. MACHINE FOR CUTTING BEVELS.

types and like articles, for facilitating locking the types in place during the ,printing operations. A further object is to provide a plurality of beveling and profiling knives for cutting circular bevels and for turning electroplates and other articles to uniform diameters simultaneously, the said knives being mounted in a novel power-driven holder which is rotated at high speed, the beveling and profiling knives being mounted in alternate order A further object is to provide a novel manually operated mechanism for supporting and rotating the electro-plates in the opposite direction to that of the knives. A further object is to'provide novel means for frictionally clamping and holding the electro-plates during the beveling and profiling operations. And a further object is to provide means for adjusting difl'erent parts of the device.

it attain these objects by the means set forth in the detailed description which follows, and as illustrated by the accompanying drawings, in which- Figure 1 is a front side elevation of the complete machine; showing the device in the act of completing the beveling and profiling of a piece of work. Fig. 2 is an end elevation of the device; showing a rough piece of work ready to be operated upon by the beveling and profiling knives, the said knives being shown in released position. Fig. 3 is a horizontal section, taken on line 33 of Fig. 1. Fig. 4. is a vertical cross-section, taken on line &-4l of Fig. 2; showing the mechanism for frictionally gripping the work; also showing the mechanism for rotating the work during the cutting operation. Fig. 5 is an enlarged topplan view of the knife holder. Fig. 6 is an edge view of the same. Fig. 7 is a topface view of one of the electro-plates before being operated upon by the knives. Fig. 8 is respectively a top-face and an edge view Specification of Letters Patent.

Patented Apr. 13, 1920.

Application filed .Tuly 5, 1919. sci-mine. 308,700.

of the electro-plate after the same has been operated upon.

Electro-plates used for printing the cardboard stoppers for milk bottles, are usually cast in large numbers in a single plate or part. These plates are afterward sawed for separating the individual electro-plates. The saw leaves the plates with ragged and irregular margins, each of which must be trimmed and then finished with a circular bevel flange, and the diameters of all of the plates must be uniform, so as to facilitate securing the plates to the beds of the printing presses in close formation for making multiple impressions of the types. Heretofore the rough plates have been turned and beveled in lathes, and the work has been slow and tedious. The object of the present invention is to provide novel means for rapidly and accurately performing the work and for greatly reducing the cost of such work. A detailed description of my improvement follows:

In the drawings, 2 represents the base of the machine, upon the top of which is mounted the usual stationary bed 3. 4 is an upright standard which rises from and is made rigid on the base 2, and has a forwardly projecting arm l which supports the power-driven cutting mechanism. 5 is a vertical spindle, the upper end of which is fitted with a pulley 5', and 6 is a belt which drives the pulley and spindle. Below the arm a is a bracket 8, supported at one end by the standard 4, the opposite end comprising a bearing 8 for the spindle 5. Below the bearing 8 the spindle is fitted with a chuck 9, which detachably receives the tapering shank 10 of a knife-holder 10. The holder 10 is substantially square and is provided with similar grooves 10 in its four edges, in which two beveling and two profiling knives, 11 and 11, are adjustably disposed in alternate order, as shown in Figs. 1, 2, 3, 5 and 6. The knives are held in place by washers 10 and bolts 10. The cutting edges of the beveling knives 11 in cline downwardly and inwardly, while the cutting edges of the profiling knives 11 are arranged vertically. The chuck 9 and the tool-holder 10 are raised and lowered by means of a lever 13, which is pivoted to the bracket 8, at S said lever having a pawl 18 which engages" a ratchet gear 14:, for locking the spindle and tool-holder in the various positions, in the usual manner. The

moving of the lever 13 in the direction in dicated by the arrow in Fig. 2 lowers the knives 11 and 11 into the cutting position, shown in Fig.1. r I

The mechanism which supports and operates the electro-types or plates 12, will now be described 3 represents a movable bed which is supported by the bed 3 and is adjustable by means of a crank 3 for positioning the electro-plates relatively to the path of the knives Lil-11. 15 is a hollow substantially cylindrical body, having a radial. arm 15. The body 15 is rigidly mounted on the bed 3 by bolts 15 which pierce a flange 15*. The electro-plates 12 or like articles are supported horizontally by a rotatable disk or part 16, which is mounted centrally onthe body 15. The disk 16 is rotated by a shaft 17 whose lower end is fitted with a relatively. large bevelgear 18, which is driven by a pinion 19,; the latter being mounted on a shaft 20 which is journaled in the arm 15', the outer endof said shaft being fitted with a crank 20, by which all of said parts are rotated during the beveling and profiling operations.

The shaft 17 operates on ball bearings 21, comprising a collar-like member 21 which is rigid on said shaft by a pin 21, and a stationary member 21, which is made rigid to the interior of the body 15 by bolts 21". The shaft 17 has a flange 17' disposed between the gear 18 and the member 21, the said gear being held against the flange by a washer 22. and a nut 22. 23 is a bracket, whose vertical arm is anchored in the arm 15, the horizontal arm of said bracket extending forwardly, and its free end being perforated in line axially with the disk 16.

2 1'- represents a bushing which reciprocates vertically in the perforated end of the bracket 23,. to the lower end of which is fitted l'l lCll a collar 25 while to the 11 Joel end of said bushing is fitted a thrust-collar 26, which is slotted at its opposite sides to receive the arms 27 of a yoked lever 27, by means of which the bushing 24. is reciprocated vertically. The collars 25 and 26 are spaced apart sufiiciently to allow the said vertical movements. The lever 27 is loosely pivoted between parallel plates 28, which are secured to the opposite sides of the bracket 23 by bolts 23. 29 represents a spindle which passes through and is rotatable in the bushing 24, the said spindle be ing held in place by a collar 3O which is made rigid to its upper end by a screw 30, and also by a disk 31 which is rigidly se-- cured to the lower end of the spindle. In order to eliminate friction between thecollar 25 and the disk 31, the meeting faces of said parts comprise the opposing members of a ball-bearing 32. The disk 31 is positioned directlyabove and in line axially with the-disk 16 from which it is spaced sufficiently to permit of the free insertion and removal of the electro-plates 12. The plates 12 are held in the proper position during the beveling and profiling operations by'the frictional engagement of the disk 31, when the latter is held against the top-face of the plates 12 under sufficient pressure to prevent accidental release of the plates, and at the same time allowing the plates to be rotated during the cutting operations, as described. The lever 27 is rocked for moving the frictiondisk 31 into and out of engagement with the electro-plates 12 by a link- 33, which in turn is operated by a handlever 34, the latter being. pivoted between the plates 28. The'full lines in Fig. 1 show the operated position of the lever 3 1, while the dotted lines in Fig. 1 and the fulllines in Fig. 4? show the released position of said; lever, whichbreaks the frictional engagement of the disk 31 with the electro-plates-l- The operation of my improved beveling device is as follows: At the start of the operation, the lever 13 should be in the position shown in Fig. 2, and the hand lever 34 should be in the dotted position shown in Fig. 1. The operator first takes one of the untrimmed plates 12, having the irregular margins12 (see Fig. 7), and places. it upon the disk 16 with its impression face upwardly. The handle 34 is then pulled downwardly (see full lines in Fig. 1), which rocks the lever 27 in the direction for bringing the swiveled disk 31 down upon the top face of the plate 12' and exerting suflicient pressure thereon to frictionally hold the plate 12 fromdisplacement, but still allowing said plate to be rotated by the manual operation of the crank .20, as described. The operator then pulls the lever 13 forwardly for lowering the knives 11--11 from the released position shown in Fig. 2 to the cutting position shown in Fig. 1. The

knives being constantly rotated by the belt 6 immediately begin cutting the portions of the edges 12' of the plates 12 which project into the path of the knives. The operator next starts turning the crank 20, which rotates the disk 16, the electro-pla'te 12 and the disk 31 until the beveling and profiling work is done. The profiling knives 11, whose edges arevertical, are employed for turning the plates 12 to the true diameter, and at the start of the cutting operations, the knives 11' trim or cut the irregular edges 12' of the plates, and by the time the said knives have finished their work, the beveling knives 1 1 are engaged in cutting the bevel fianges'12 The arrows in Figs. 3 and 5 show the direction of rotation of the knives 11-11 relatively to that of the plate 12.- The knives preferably rotate at a high speed. The rotationof the plates 12 being effected manually, naturally varies in speed, but should be as. rapid as possible, so as to insure rapid and accurate work. The work of beveling each plate 12 consumes but a few seconds time. The means herein shown and described for frictionally gripping and holding the plates 12 also serves to position said plates so that the bevel flanges 12 are truly concentric to the impression faces of the plates.

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

1.. A machine for cutting circular bevels, including a plurality of knives, a power driven holder for said knives, a work support, a train of gears for rotating said support for bringing the work into the path of said knives, a swivel member for frictionally clamping the work to said support, and a vertically reciprocatable part for operating said swivel member.

2. In a machine for cutting circular bevels, a power-driven tool-holder adapted to be moved into and out of cutting position, beveling and profiling knives carried by said holder, a rotary work support adapted for positioning the margins of the work in the path of said knives, means for manually rotating said support, and a swivel device for frictionally holding the work while the latter is being rotated.

3. In a machine for cutting circularbevels, a plurality of beveling and profiling knives, a power driven holder for said knives adapted to be reciprocated vertically for moving said knives into and out of cutting position, a manually operable work support adapted to position the work in the path of said knives, and a swivel device adapted to frictionally hold the work against accidental release while said knives are performing the cutting operations.

4. In a circular beveling machine, a plurality of beveling and profiling knives arranged in alternate order, a power-driven holder for said knives, a work support, a train of gears for rotating said support for bringing the margins of the work into the path of said knives, a swivel clamping device for centering and frictionally holding the work on said support, and means for exerting suflicient pressure upon said clamping device to prevent the accidental release of the work during the beveling operations.

5. A beveling and profiling machine, including a power-driven spindle, a toolholder supported and rotated by said spindle, a plurality of beveling and profiling knives carried by said holder and adjustable therein, said knives arranged in alternate order, a rotatable work support, the axis of said support being parallel to the axis of said tool holder, means for rotating said support in a direction opposite to the direc tion of rotation of said tool holder, and means for frictionally clamping the work to the said support.

6. A beveling and profiling machine, including a spindle, a tool-holder supported and rotated by said spindle, a plurality of beveling and profiling knives carried by said holder, a rotatable work support, the axis of said support being parallel to the axis of said spindle, means for rotating said sup port, means for frictionally clamping the work to said support, a rocking lever for reciprocating said clamping means, and means for rocking said lever.

7. A beveling and profiling machine, including a power-driven spindle, a tool holder supported and rotated by said spindle, a plurality of knives carried by said holder, a work support rotatable on an parallel to the aXis of said spindle, a train of gears for operating said support, a thrust-bushing, means for reciprocating said bushing, and a clamping disk disposed in line axially with said support and journaled in said bushing adapted to frictionally hold the work during the rotation of said support.

In testimony whereof I afiix my signature.

WILLIAM P. CURRY.

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