US1380542A - Punching-machine - Google Patents

Description

1. ,DREWES. PUNCHING MACHINE. APPLICATION FIL'ED NQV. I0. 1919.

OOOOOOOOOOOOOOOOOOOO OOOOQOOOOOOOOOO0000000000 Patented Jline 7, 1921.

JOH'ANNES DREWES, 0F GIDEON, NETI-IERLANDS.

PUNGI-IING-MACI-IINE.

To all whomit may concern:

Be it known that I, JoHANNEs Dnnwns, a subject of the Queen ofthe Netherlands, residing at Gideon, near Groningen,Netherlands, have invented certain new and useful Improvements in Punching-Machines, of which the following is a specification.

Punching machines have been proposed in which a plurality of punches are mounted in a common reciprocating block. They serve the purpose of punching a complete serles of holes at eachworking stroke 0 1 the machine.

The main object of my present invention is to make said machines suitable for perforating plates in which the numbers of holes in successive series are unequal. With this and other objects in view I connect one or a plurality of punches, or punch holders, pivotally with the said block, preferably so as to adapt them toturn in a plane at rightangles to the axis of the row of punches, and I associate said punches, or punch holders, with means by which they may be swung out and thereby rendered in operative.

Other'features of my present lnvention will be described with reference to the annexed drawing and more particularly pointed out in the claims.

In the drawing: 7 V

Figure 1 is a front elevational view of a machine constructed in accordance with my new principles, some of its parts .being omitted;

Fig. 2 is a sectional view along line A-A in Fig. 1, and I Fig. 8 illustrates ,part of a ships plate as may be perforated semi-automatically by a machine shownin Figs. 1 and 2 and provided with a suitable number of punches.

The illustrated machine comprises two supports 1 and 2 for the main shaft 3 which carries a loose gear 4. The said g'earmeshes with. a pinion 5 on a shaft 6 provided with a pulley 7 Secured on shaft 3 is a disk 8 which may be coupled with and released 7 from the gear 4: by means of a mechanism 9, the exact construction of which 1s of no 1mportance as far as my invention is con-.

cerned. p

On the shaft 3,are keyed two eccentric 5 disks 10, 10 having freedom of rotation in Specification of Letters Patent.

Patented June '7, 1921.

Application filed November 10, 1919. Serial No. 336,873.

recess of block 12 in the direction of the arrow shown in Fig. 2. Each punch holder 1s adapted to receive a punch 15.

Supported in bearings of the block 12 are two horizontal shafts 16 and 17. Each holder 14 is pivotally connected by means of a link 18 with a lever 19 on shaft 16; the pivot connecting the parts 18 and 19 is connected by a link .20 with the end of a lever 21 on shaft 17. The levers 19 and 21 are adapted to be rigidly secured on the shafts 16 and 17 respectively by means of set screws 16- and 17*. By releasing these screws the said levers may be uncoupled from said shafts. Keyed on shaft 16 is a handle it cooperating with an arcuate guide piecec provided with a slot in which the said handle may be secured, for instance by a clamping. screw.

On shaft 17 is secureda lever 22 provided at its end with an antifriction roller 28. A coiled spring 17 on shaft 1'? always tends to press the said roller in a counter clockwise direction against a cam 24. Said cam is keyed on a shaft 25 supported in suitable bearings of the block 12 and. carrying a ratchet wheel 26 cooperating with a pawl 27. The pawl 27 is mounted in aframe 28 which is loosely mounted on shaft 25 and pivotally connected by a lever 29 with a shaft 30 supported in bearings of the slides 11 and 11 The distance between the pivot connecting leve r'29 and frame 28, andshaft 25 may be increased or reduced by means of a screw 81 which is preventedfrom moving axially in the frame 28 and which coacts pawl 36 mounted in a frame 37 which is pivotally connected by a rod 38 to a traveling nut 39 mounted on the latter being rotatable within a block 41 but prevented from endwise movement therein. The block 41 is secured to a disk 42 on shaft 3; the said disk 42 is provided with a radial slot in which the nut 39 is adapted to reciprocate. It will be understood that owing to a rotation of screw the nut 39 will move radially over disk 42, whereby the length of stroke of rod 38 may be varied. The pawls 27 and 36 are loosely mounted in their frames 28 and 37, and are provided with enlarged upper ends or heads 27 and 36 by means of which they may be lifted out of engagement with their ratchet wheels. These heads are provided on their under faces with depending lugs or projections 27 and 36 adapted to fit in diametrically opposite recesses in the frames, so that the pawls after having been lifted out of engagement with the ratchets, may be turned through 180 and then reengaged therewith in inoperative position, the projections and recesses coacting to hold the pawls in either position.

The shaft 34 further carries two rollers 43, 48 for supporting the flanges of the beams 32, 32, and rollers 44, 44 for supporting the work piece to.

Mounted on a shaft 45 supported by the frame of the machine are three bell crank levers 46, each of which is provided at one end with an antifriction roller 47, its other end carrying a stud 48 projecting into a curved slot in a guide piece 49, whereby the lever 46 may be secured so that the roller 47 presses the work piece 20 on the die 50.

The main shaft 3 of the machine carries two cams 51,51 enacting with pins 52, 52? which are suitably guided in a vertical direction and which are pressed by springs against the saidcamsl The pins 52, 52 are tapered at their lower ends. If I wish to perforate the work piece to in such a mannor that the number of holes in all series is the same and corresponds with that of the punches in the machine, I may for instance, secure all levers 21 to the shaft 17 by tightening their set screws 17, and lf render the pawl 27 inoperative, for instance, by turning it through 180 about its longitudi nal axis as explained above; at the same time I see to it that the cam 24 assumes the position shownin Fi 2, that is a position wherein the shaft 1 under the action of the coiled spring 17'" holds the punches in their operative positions. stood that under these conditions my machine operates in quite the same manner as the ordinary punching machines having a plurality of stationary punches arranged side by side.

If during the operation of the machine a distinct punch or a plurality of distinct It will be under- In case it is necessary for selected punches to automatically or periodically become operative and inoperative, I throw the pawl 27 into operative engagement with the ratchet wheel 26, whereby the cam 24, owing to the horizontal motion of the slides 11, 11 ,,ism

periodically turned through a given angular distance. As long as the roller 23 engages the recessed portion of the cam 24, those punch holders whose lever system 18, 19, 20, 21 is rigidly secured to shaft 17, remain in their operative positions. ever the lever 22 is turned by the cam. 24 through a given angular distance in a clockwise direction, the said punch holders will be swung out and become inoperative. v

means of the screw 40 the distance through which the work piece to is fed at each revolution of shaft 3 may be varied with a view to the pitch of the series of holes. With the aid of screw 31 I may control the angular displacement of the cam 24 per revolution of shaft 3, and consequently the movements of the punch holders that are fast on the shaft 17.

If it is desired to vary the pitch of the holes in the series, the punch holders 14 are simply replaced by a series of holders having a corresponding thickness in the direction of the axis of the machine.

If, how;

The pins 52, 52 have for their purpose to hold the work piece in an invariable position during the punching stroke, in a manner well known in the a The length of the punches decreases from the center of the series toward both ends,

whereby I realize the advantage that the punching pressure gradually increases during the working stroke.

What I claim as my invention is:

1. in a punching machine, the combina intervals for positively tion of a reciprocatory'block formed with a inoperative position.

5. In a punching machine, the combination of a reciprocatory element; a plurality of punching devices pivoted thereto; a rock shaft to which all of the punching devices are individually connectible to swing into inoperative position when said shaft is turned; and means for automatically actuating said shaft.

6. In a punching machine, the combination of a reciprocatory element; a plurality of punching devices pivoted thereto; a rock shaft to which all of the punchingdevices are individually connectible to swing into inoperative position when said shaft is turned; and means operating automatically at predetermined intervals to actuate said shaft.

7. In a punching machine, the combination of a reciprocatory element; a plurality of punching devices pivoted thereto; a rock shaft to which all of the punching devices are individually connectible to swing into inoperative position when said shaft is turned; operating mechanism for the reciprocatory element; a cam operatively connected with said mechanism; and connections between said cam and said shaft for automatically operating the latter from the former.

8. In a punching machine, the, combination of a reciprocatory element; operating mechanism therefor; a plurality of punching devices pivoted to said element to move therewith; means connected to swing a selected punching device or devices relatively to said reciprocatory element into an inoperative position; a cam connected to be driven from said operating mechanism; and connections between said cam and said swinging means for automatically. operating the latter from the former.

9. In a punching machine, the combination of a reciprocatory element; a plurality of punching devices pivoted thereto; and mechanism for automatically and positively swinging a selected punching device or devices alternately into and out of inoperative position.

10. In a punching machine, the combinationofa reciprocatory element; a plurality of punching devices pivoted thereto; and mechanism for automatically and positively swinging a plurality of selected punching devices simultaneously into inoperative position.

11.'In a punching machine, the comb-ination of a reciprocatory element; a; plurality of punching devices pivoted thereto; and mechanism for automatically and positively swinging a plurality of selected punching devices simultaneously first into inoperative position and then back into operative position.

12. In a punching machine, the combination of a reciprocatory element; a plurality of punching devices pivoted thereto for swinging movement; an oscillatory shaft disposed parallel with the axis of movement of the punching devices; operating mechanism for the reciprocatory element; a cam connected to be operated by said mechanism; a lever system between said punching devices and said shaft to operate the former from the latter; and a projecting member carried by said shaft for engagement by said cam.

13. In a punching machine, the combination of a reciprocatory element; a plurality of punching devices pivoted thereto for swingingmovement; a pair of oscillatory shafts disposed parallel with the axis of movement of the punching devices; a lever system between the punching devices and one of the oscillatory shafts; mechanism for automatically operating said reciprocatory element and said lever system; a connection between the other oscillatory shaft and the lever system; and means for manually operating said other oscillatory shaft and holding it in adjusted position.

14. A punching machine comprising a re- I ciprocatory carrier; a plurality of punching devices attached to the carrier to move therewith, but capable of movement relative to said carrier into and out of inoperative position; and mechanism for simultaneously moving a plurality of selected punching devices, to the exclusion of the others, into inoperative position. i

15. A punching machine comprising a reciprocatory carrier; a plurality of punching devices attached to the carrier to move therewith, but capable of movement relative to said carrier into and out of inoperative position; and mechanism periodically moving a plurality of selected punching devices into inoperative position.

16. A punching machine comprising a reciprocatory carrier; a plurality of punching devices attached to the carrier to move therewith, but capable of movement relative to said carrier into and out of inoperative position; and mechanism operable automatically to move a plurality of selected punching devices, at predetermined regular intervals first'into inoperative position and then into operative position.

17. A punching machine comprising a reciprocatory carrier; a plurality of punching devices attached to the carrier to move there'- With, but capable of movement relative to said carrier into and out of inoperative p0- 'sition; and mechanism operable automatically and simultaneously upon a plurality of selected punching devices, to the exclusion of others to move them first into one of such position. I v r I In testimony whereof I aflix my signature; r J OHANN'ES DREWES.

position and then into the other

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