US2051031A - Punching machine - Google Patents

Description

J. J. DILKS, JR

PUNCHING MACHINE Aug. 18, 1936.

Filed April 19, 1935 5 Sheets-Sheet 1 INVENTOR:

TTORNEYS.

1' 5 1 gal "mmwlmicm Aug. 18, 1936. J J. DlLKS' JR 2,051,031

PUNCHING MACHINE Filed April 19, 1935 5 Sheets-Sheet 2 III i 2 INVEN TOR: Jamas J DZJZ/KQJ";

A TTORNEYS.

Aug. 18, 1936. J. J. DILKS, JR

PUNCHING MACHINE 5 Sheets-Sheet 3 Filed April 19, 1935 INVENTLOR: JamesJDzLks,J;

I I I;

a EYS.

Aug. 18, 1936- J. J. DILKS, JR

PUNCHING MACHINE Filed April 19, 1935 5 Sheets-Sheet 4 .7 w -w/LL INVEIYTOR: Jamas .lDzLks, If,

A TTORNEYS.

Aug. 18, 1936. 4 I K JR 2,051,031

PUNCHING MACHINE Filed April 19, 1935 5 Shets-Sheet 5 wmvasszss: INVEIYTOR: 5y Jamas l Dr/Urs, J1;

Patented Aug. 18, I936 2,051,031 PUNCHING MACHINE James J. Dilks, In, Philadelphia, Pa. Application April 19, 1935, Serial No. 17,168

14 Claims. (01. 164-87) This invention relates to machines for punching and perforating sheet metal or the like.

In connection with machines of the kind referred to, I aim to aiford simple and reliable l mechanism for positionally shifting an intermittently-actuated punching or perforating tool, and

a sheet metal disk relatively in such amanner that new blank portions of the disk surface are successively presented to the tool in alternation with the actuations of the latter, by equal increments along a spiral path of uniform pitch.

Another object of my invention is to provide regulatable means for automatically stopping the machine after a predetermined number of actuations ofthe punching or perforating tool.

A machine having the aforedescribedattributes is especially -advantageous in the production of disks useful as driving elements in disk motion picture cameras and projectors such as featured in my co-pending applications, Serial Numbers 7,560 and 7,562, filed February 21, 1935, where it is absolutely essential that'the holes in the driving disks be very closely and equally spaced, with absolute accuracy, along the spiral as well as ra-.

dially of said disks.

The machine of my invention may also be advantageously employed for example in punching out washers, or in blanking coins, medallions and the like from blank sheet metal disks, with a minimum wastage of the metal.

Other objects and attendant advantages of this invention will be manifest from the detailed description following of the drawings, wherein Fig. I is a side elevation of a punching machine conveniently embodying the present improvements, portions of the machine being broken out and others sectioned for better illustration of important details.

Fig. 11 is a view, partly in end elevation and partly in cross section, taken as indicated by the arrows II-II in Fig. I.

Fig. III is a plan view of the machine with certain parts removed and with portions broken out and sectioned.

Fig. 1V is a fragmentary plan sectional view taken as indicated by .the arrows IV--IV in Fig. 11.

' Fig. V is a fragmentary view, partly in elevation and partly in section, taken as indicated by the arrows V-V in Fig. IV; and

Fig. VI shows a' face view of a disk perforated with the machine.

As herein delineated, my improved punching machine comprises an oblong base I to the top of which are bolted, crosswise of its opposite ends, brackets 2 and 3 respectively having aligned upstanding bosses 4 and 5 for the rigid support of a pair of laterally spaced horizontal track rods 6. Movable on the base I is a carriage I having 5 flanged wheels 8 at opposite sides thereof which run on the track rods 6. Centrally mounted on the carriage 1 is a standard 9 having a forwardly projecting overhang arm l0, said arm terminating in a head II with a guideway I2 for a vertl- 10 cally reciprocating slide l3 which carries a punching tool It and a pilot pin IS in definite laterally spaced relation. As shown in Figs. II and IV, the punching tool It lies in the longitudinal axis of the machine with the pilot pin l5 disposed at the l5 left thereof in. the aforesaid figures. Up and down movement is imparted to the slide l3 through a pitman l6 connected to an eccentric pin II on a crank disk 3 at the right hand end (Fig. I) of. a horizontal shaft l9, which latter 20 is journaled in bearings 20 and 2| at the top of the standard 9. As shown, the shaft I9 is driven from an electric motor .20 supported on the carriage I at its rear end, through speed reducing drive connections including a belt 23 (Fig. I) 25 which coordinates a small pulley 24 on the motor shaft with a larger pulley 25 on a counter-shaft 28. and a spur pinion 21 on said counter-shaft in mesh with a gear wheel 28 on the rear or left hand end of said shaft IS. The disk D which is to be punched out or perforated, is mounted on a head 29-at the upper end of a vertical spindle which, like the punching tool, lies in the longitudinal axis of the machine. The spindle 30 is journaled in an upright bearing bracket 3! 35 bolted to, the top of the base I at the forward end of the latter in the interval between the track rods 6. Upstanding from the collar 29 is a pair of diametral studs 32 and 33 which are of different diameters, see Figs. I and IV, and which 40 are symmetrically spaced with respect to the protruding upper end of the spindle 30. The studs 32 and 33 and the upper end of the spindle 30 are adapted to be engaged by corresponding preformed apertures 30a, 32a and 33a (Fig. VI) in the disk D. After placement of the disk D on the head 29, it is secured by a cap 34 and a winged clamp nut 35, of which the latter engages screw threads on the upper end of the spindle 30. 50 During the perforating operation, the disk D is supported in part by a forwardly projecting shelf 35 rigidly secured to the top of the carriage I. As shown in Figs. I and IV, the shelf reaches into close proximity to the head 29 on the spindle 30 5 with a passage H in the lower part of the shelf 36, through which opening the punchings fall into a gravity chute 42 (Fig. 11) from whence they are'defiected laterally into a suitable collecting receptacle, (not illustrated) placed on the base 2.

The punching tool I4 ,and the pilot pin I5 (see Figs. 11 and V) are respectively secured,'by

/means of screws 43 and 44 in a holder 45 bolted to the bottom of the slide I3. The lower reduced ends of the tool l4 and the pilot pin I5, which, it will be observed are of like diameter, pass through correspondingly spaced openings in a stripper/plate 46. This stripper plate 46 is subject to "a compression spring 41 which surrounds the punching tool I4 and the pilot pin I5, and which is confined to up and down movement by a pair of shank members 46 having slidihg guidance in openings 49 of the holder 45, heads 56 at the top of the shank members serving to limit the downward movement of the stripper plate 46 relative to the slide I3 under the action of the spring 41. The function of the stripper plate 46 is to hold the disk D down on the shelf 36 as the perforating tool I4 and the pilot pin I5 are withdrawn after each punching operation. In this function, the stripper plate 46 is assisted by a pair of rollers 5i on arms 52 bolted to the forward end of the standard 9.

During the operation of the machine, the disk D is intermittently rotated by means of a picker having the form of a pin 53 which is of the same diameter as the tool I4 and the pilot pin I5 and which successively enters the holes previously formed in said disk by the punching tool I4. As shown in Figs. 11 and V this picker pin 53 has capacity for axial movement in the boss 54 of a slide 55 which is guided. for reciprocative moveshaft 59 journaled in a bracket 66 pendant from receives motion in turn through another pair of miter gears 65 and 66 from a vertical shaft 61 which, at its lower end, has journal support in the bracket 64 and at its upper end in a bearing bracket 66 bolted to one side of the standard 9. A miter pinion 69 at the top of the vertical shaft 61 meshes with' a companion miter I6 on a horizontal stub shaft 'II also having journal support in the bracket 66 and carrying a spur gear 12 that meshes with a corresponding spur gear I3 on the horizontal shaft I9. Thus for each rotation of Lhe horizontal shaft I5, the slide 55 is given one complete reciprocation, the eccentric.56 being so proportioned that the movement imparted to'the disk D corresponds exactly to the spacing of the punching tool I4 and the pilot pin 2,0 1,031 and is provided in its frontal edge with a con-' I5, whereby, at each movement. a new blank space on the disk surface is presented to said punching tool as later on more fully explained. The picker 53 is withdrawn from the disk D during each of its operative cycles by'a spring'15 in 5 compression between the bottom end of the boss 54 of the slide 55-and a flange I6 at the bottom end of said picker, which latter is rounded as shown to engage a lever I'I fulcrumed at I6 to the guide 56. From Figs. II and V it will be noted that the lever I1 is formed with a finger I9 which engages a rotary cam 66 on the vertical shaft 59. This cam 66 is so positioned on the shaft 59 that the picker 56 is moved upward into each newly punched hole when the slide 55 reaches its fully advanced position.

Concurrently with each pick of the picker 53, the carriage I is shifted rearward on its tracks 6, also as more fully explained later, through a partial rotation of a horizontal feed screw 6| whereof the opposite ends are journaled in bearlugs. 62, 63 secured to the top of the base I of the machine, said screw engaging an internally threaded boss 64 of a pendant bracket on said carriage, see Figs. I and III. Intermittent 25 rotative movements are imparted to the feed screw 6I through a miter pinion 66 thereon which meshes with a miter pinion 61 on the vertical spindle 36 whereby the disk D is supported. a

As a means for setting the machine for start- 30 ingl have provided a supplemental shaft 66 in alignment with the screw spindle 8|, said shaft being journaled in bearings 69 and 96 respectively secured to the base I and to the bracket 3 at the forward end of the latter, see Fig. III. At 35 its inner end the supplemental shaft 68 carries a bevel gear 9| which meshes with the bevel gear 61 on the vertical spindle 36. -Forward of the bearing 96, the supplemental shaft 66 is provided with a clutch collar 92 adapted to be engaged '40 by clutch pins 93 on a hand wheel 94. A spring 95 normally urges the hand wheel 94 against a head 96 at the outer end of the supplemental shaft 66 with' the pins 93 withdrawn from the apertures in the clutch collar 92.

stoppage of the machine is automatically effected by throwing of a snap switch 91 interposed in one of the leads 96 from a power line 69 to the motor, 22, the toggle lever 61a of said switch being engaged and thrown by an abutment in the form of a screw bolt I66 adjustable in a bracket I6I on the carriage I.

The operation of the machineis as follows: The hand wheel 94 is pressed inward to clutch the collar 62 on the supplemental shaft 66, and rotated clockwise to turn the feed screw 6I until the bracket 64 on the carriage I abuts the fixed bearing 63 on the base I, with the studs 32 and 33 on the mounting head 29 at the top of the vertical spindle 36 positioned as shown in Figs. II and IV. A blank disk D is then placed on the mounting head 29 and made fast by the cap 34 and the wing nut 35, with a preformed starting hole I62 in said disk (Fig. VI) axially beneath the pilot pin I5. The motor switch 91 is thereupon manually thrown to the ,-on position shown in Fig. I and the machine thereby set in motion. Immediately, the slide I3 moves downward from the position shown in Fig. 11 incident to which the stripper 46 makes advance contact with the disk D. -As the descent of the slide I3 continues, the pilot pin I5 enters the starting hole I62 in the disk D to hold the latter against accidental displacement, while the tool I4, in following, punches the flrsthole I63 in the disk rightward of said starting hole. During the subsequent rise of the tool M and the pilot pin IS, the slide is advanced, i. e. moved to the right in Figs. IV and V by action of the rotary cam 58 on the vertical shaft 59, and the picker pin 53 elevated by action oi the other rotary. cam 80 on the shaft 59 incident to a momentary dwell of said slide in its advanced position, into the hole I02 just vacated by the pilot pin. By a subsequent receding movement of the slide 55 to the left in Fig. IV under the influence of the cam 58, a rotative shift is imparted to the disk D by the picker 53 in the direction of the arrow in Fig. IV to an extent corresponding to the spacing of the punching tool l4 and pilot pin l5. As a result of this shift, a new blank portion of the surface of the disk D is presented for punching during the next descent of the tool Id. The cycle just described is continuously repeated; and concurrently witheach rotational shift of the disk D, movement is imparted to the feed screw 8| from the vertical spindle 30 through the miter gears 86 and 81 with the result that the carriage I is caused to. recede, i. e. shift leftward in Fig. I by a definite amount. By such concurrent rotational shifting of the disk D, and radial shifting of the carriage l, in respect thereto, the new blank spaces of the disk surface are successively presented to the tool l4 along'a spiral path. Since the throw of the picker 53 and the movement imparted to the carriage 'i at each actuation are both constant, the holes punched in the disk D by the tool IE will be evenly spaced accurately along a spiral having a uniform pitch as shown in Fig. VI. The machine continues in operation until the switch 91 is automatically thrown to off position by engagement of the adjustable abutment Hill with the toggle lever 91a of said switch, when the motor 22 will be stopped after a predetermined number of actuations of the tool It and the punching of a corresponding number of holes in the disk.

Obviously, by proper design of the parts, the spacing of the holes and the pitch of the spiral may be made to any required dimensions, the disk illustrated in Fig. VI having its holes very closely spaced both circumferentially and radially. Moreover, by employing punching tools M of larger diameter and providing for correspondingly increased relative movements of the disk and the tool, my improved punching machine may be adapted, as already mentioned, for stamping out washers, blanking coins, medallions, etc.

- with a minimum wastage of metal.

The two uses which have been described are of course to be considered as suggestive of others to which the machine may be put in practice.

Having thus described my invention, I claim:

1. A punching machine comprising a rotatable mounting for a disk of sheet metal or the like; an intermittently-actuated punching tool; a reciprocating picker operative in alternation with the actuations of the tool to engage a previously formed hole in the disk to rotatively advance the' disk by a definite amount; and a pilot pin adapted to engage another previously formed hole in the disk to preclude accidental shifting of the latter.

during each punching operation.

2. A punching machine comprising a reciprocating punching tool; a support for a blank of sheet metal or the like beneath. the tool; means operative in alternation with the tool to pro-,

gressively advance the blank for presentation of new blank portions of its surface to said tool; and a pilot pin associated with the punching tool andadapted to engage a previously formed hole in the blank to hold the latter against accidental shifting during the punching .movement of the tool.

3. A punching machine'comprising a rotatable mounting for a disk of sheet metal or the like; a carriage guided for movement radially of the disk; an intermittently-actuated punching tool reciprocative in the carriage; a picker element on the carriage operative in alternation with the actuations of the punching tool to engage a previously formed hole in the disk and to rotatively shift the latter by a definite amount each time; and means deriving movement from the rotatable mounting for the disk to progressively shift the carriage concurrently on its guide.

4. 'A punching machine comprising a rotatable mounting for a disk of sheet metal or the like; a carriage guided for movement radially of the disk; an intermittently-actuated punching tool reciprocative in the carriage; a picker element on the carriage operative in alternation with the actuations of the tool to engage a previously formed hole in the disk and to rotatively shift the latter a definite amount each time; and a feed screw deriving intermittent movement from the rotatable mounting of the disk to concurrently shift the carriage on its guide.

5. A punching machine comprising a rotatable mounting for a disk of sheet metal or the like; an intermittently actuated punching tool; a carriage for the tool guided for movement radially of the disk; and means for intermittently rotating the disk mounting and for progressively shift-.

ing the carriage in alternation with the actuations of the tool including an electric motor for driving the machine; a switch in circuit with the motor; and a regulatable abutment on the carriage adapted to trip the switch and stop the machine after a predetermined number of actuations of the punching tool.

6. A punching machine comprising an intermittently actuated tool for punching holes in a disk of sheet metal or the like, picker means for successively engaging the punched holes to rotatively shift the disk for presentation of new blank portions of 'the disk surface to the tool; and means for concurrently shifting the tool and the disk relatively so that the holes are formed along a. spiral.

7. A punching machine comprising an intermittently actuated tool for punching holes in a disk of sheet metal or the like; picker'means for successively engaging the punched holes to rotatively shift the disk for presentation of new blank portions of'the disk surface to the tool; and means for concurrently shifting the punch radially of the .disk so that the holes are formed along a spiral.

8. A punching machine comprising an intermittently actuated punching tool; means for positionally shifting-the tool and a disk of sheet material relatively, step by step, in alternation with the actuations of the tool for successive presentation of'new blank portions of -the disk surface to the tool along a spiral path; and regulatable means for automatically stopping the machine after a predetermined number of actu ations of the punching tool.

9. A punching machine comprising a rotatable mounting for a disk of sheet metal or the like;

an intermittently actuated punching tool; a carriage for the tool guided for movement radially of the disk; picker mechanism operative inialternation with the tool for successively engag rotate the disk mounting; and means deriving movement from the disk mounting for progressively shifting the carriage concurrently.

10. A punching machine comprising a rotat-- able mounting for a disk of sheetmetal or the like; an intermittently actuated punching tool;

' a carriage for the tool guided for movement radially of the disk; picker mechanism operative in alternation with the tool for successively engaging holes punched in the disk to intermittently rotate the disk mounting; and a feed screw deriving movement from the disk mounting for progressively shifting the carriage concurrently so that the holes are punched in the disk along a spiral.

11. A punching machine comprising a rotatable mounting for a disk of sheet metal or the like; an intermittently actuated punching tool; a carriage guided for movement radially oi the disk; a slide having guidance for reciprocation in the carriage and supporting the tool; and means for intermittently rotating the .disk mounting and for progressively shifting the carriage in alternation with the actuations of the tool.

12. A punching machine comprising a rotatable support for a disk of sheet metal and the like; an intermittently actuated punching tool guided for movement radially of the disk; means operative in alternation with. the actuations of the tool for engaging previously punched holes in the disk to rotativeiy shift the latter for presentation of a new blank portion of the disk surface to the tool and means for concurrently shifting the tool support relative to the disk.

13. A punching machine comprising a rotatable support for a disk of sheet metal or the like; an intermittently actuated punching tool;

a support for the tool guided for movement radially of the disk; a reciprocating picker with -a fixed throw operative in alternation with the dially of the disk; means for intermittently rotating the disk mounting and for progressively shift ng the carriage in alternation with the actuations of the tool; an electric motor for driving the machine; a spring in circuit with the motor; and a regulatable abutment on the carriage adapted to trip the switch and stop the machine after a predetermined number 01 actuations oi! the punching tool.

JAMES J. DILKS, JR.

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