US1298806A - Blanking-press. - Google Patents

Description

W. SKRZYNECKI.

BLANKING PRESS. I APPLICATION F1110 1uLY 1. 191s.

1,298,806. Patented Apr. 1,1919.

73 I 72 4 SHEETS-SHEET 2.

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' By @a m A TTUHNEY W. SKRZYNECKI.

BLANKING PRESS.

APPLICATION HLED JULY 1. 191s.

1 ,298,806. Patented Apr. 1, 1919.y

4 SHEETS-SHEET 3.

A TTORNEY W. SKRZYNECKI.

BLANKING PRESS.

APPLICATxoN FILEDYJULY l. ma.

1,298,806., l Patented Apr. 1,1919.

4 SHEETS-SHEET 4.

if 45 194 y .l a u l/ /l a n 7g [J Je 47 n n n y JZ '10/ A g A 7TOHNEY WAWRZYNIEC SKRZYNECKI, OF CHICAGO, ILLINOIS.

BLANKINGFPRESS.

Application led July 1, 1918. Serial No.242,795.

' the following ,is a specification.

This invention relates to improvements in blanking'` presses, and particularly to types adapted Vto operate upon relatively thin material, .as paper, `,clothor leather, and has as its speciali-object. the'p-rovision of means whereby a plurality of differently shaped dies are interchangeably mounted upona rotatable holder so that any desired size ma be brought into position for use. v

A further object is to provide means whereby the dies are properly centered when brought into operative posi-tion, it being understood that the plunger stamps are readily interchangeable within their holders.

These andother like objects are attained i by the novel construction v,and combina-tion of parts hereinafter described and shown in the accompanying drawings, forming a material part of this disclosure, and in which Figure 1 is a side elevational view showing a blanking press made in accordance ingv with the invention, parts being broken away in order to disclose the construction.

Fi 2 is a similar view of the same lookfgrom the side.

Fig. 3 is a vertical sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is a transverse sectional view taken on line 4-4 of Fig. 1.

Fig. 5 is a side elevational view showing the rotatable die holder.

Fig. 6 is an end view of the same, and

Figs. 7 and 8 are perspective views showing various forms of cutting dies employed.

The press comprises a substantial metallic frame', having a pair of support columns 10 at the front, similar elements 11 being at the rear, all four of which are connected by a transversely disposed frame having sides 12, and end elements 13.

ITherear columns 11 extend upward to a level surface 15, while at the front, formed with the columns 10 and horizontal elements Specification of Lettersvlatent.

Patented Apr. 1, 1919.

16, are substantially circular disk- like side plates 18 and 19, having a level horizontal top 20. y

A cylinder extends inwardly from the frame side 18, throughan enlarged circular opening 24 formed in the opposite side 19, its bore 22 being in a horizontal plane.

Mounted on the exterior of the cylinder 22 is a drum 25, the bore 26 of which is in register with Ythe bore 23 of the cylinder. This drum 25 is formed witha plurality of flat longitudinal faces 28, containing openings 29, having beveled side walls adapted to receive the several die blocks 30, formed with similarly beveled side edges 31 and 32, the faces of eachof the die blocks having upon them raised cutters 33, formed withsharp edges and containing openings 34 through which the blanked material passes.

These die blocks are adapted to it neatly within the inclined surfaces of the die holder and maybe lremoved therefrom by pressure from the interior of the cylindrical opening 26 in the center of the drum.

Secured to the extending end of the drum 22 is a ring 35 having ratchet teeth 36 upon its periphery, and engaged upon the frame element 19, rearward of the axial center of the drum, is a lever 38 pivoted upon the screw 39, the lever having in its larger inner nd a recess 40, in which is a slidable pawl 41 normally pressed out by the spring 42 at the bottom of the recess, the pawl engaging with the teeth 36 so that the drum 22 may be rotated.

The opposite end of the lever 38 is engaged by a pin 44, to a link or connecting rod 45, its lower end being pivotally engaged at the end of a lever 46 fixed upon atransverse shaft 47 mounted in brackets 48 upon the frame sides 12, the opposite end of the shaft 47having secured to it a crank 49, terminating in a foot pedal 50, and it will be evident that upon depressing the pedal 50 the lever 38 is caused to oscilla-te so that the pawl 41 will engage with the teeth 36, thereby transmitting rotary motion to the drum, the lever 38 being normally held in an operativeposition by the coiled tension spring 51.V

Formed through the side plate 18 are openings 52 arranged in a circular row and agreeing in number and position with the several faces 28 on the drum. Engageable in the openings 52 is the inturned end of a detent lever 53, fulcrumed in a-bracket 54 provided with an operating handle 55, so that the same may be retracted from the openings 52, when it is desired to transmit rotary motion to the drum, the detent snapping into position when the next succeeding,

opening is brought into registration.

Secured on top of the surface 20 is a plate 57, having a raised guard 58` rmly afxed thereabove which is readily removable when it is desired to rotatethe drum, the dies 301 extending upward therethrough.

Afiixed upon the surface 15 is an upper frame 69,, they front portion 6l of which is bored to; receive the plunger spindles 62, engaged withr a transverse bar 63 at their upper end which is pressed normally upward, due to the coiled compression springs 64, the iower end of the spindles 62 having adjustably secured to them a pressure plate 65 having openings. in conformity with the die immediately therebelow.

Reciprocating motion is transmitted to the transverse bar-.63. by a ring 66 having a lug 67v through which passes a pin 68, the ring being circumjacent to an eccentric 69;, fixed to a shaft 70. This shaft is mounted in projections 71 extending up from the- 80, mounted upon the end element 13 of the lower transverse frame at the bottom ofthe machine, the shaft having fixed upon it a driving pulley 81 which may be continuousl'y rotated by a beltv82 from any convenient source of power.

In order toy control rotation of the front operative shaft 70, a fixed friction clutch element 85 is secured on a rigid shaft 86, having a p-art engageable with concave clutch element 87, held to the shaft 79 by a pin 88, operable in a slot 89, formed therethrough and which is slidable by the movement of' a lever 90, pivoted on the frame 12 on the bracket 91, and drawn normally out of engagement due to the pull of a coi-led tension spring 92, this lever being operable by engagement with the foot lever 93 having a pedal 94, the lever being fu'lcrumed on the bracket 95, the device being such as e11- gage the friction elements thereby stopping rotation of shaft 70.

From the foregoing it will be seen that when the power is transmitted to4 the driving pulley 81 and the friction clutches are disconnected, the plungers or spindles will be caused to reciprocate once at each revolution of the shaft pressing whatever material may be held by the guides 58 against the vertically disposed die presented immediately therebelow, forming a blank which willdropi throliglifinto the cylinder 23 and can be readily removed therefrom.

When it is desiredto.l change the dies, the lever 55 is depressed,'the foot. pedali 5l@ operated so as to bringva new die-'into proper f operative position andthe plum-gers changed tol correspond.

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

1. In a blanking press, the combination with a rigid frame, a cylinder rigidly Suipported therein, a plurality of faces formed externally on said cylinder, cutting -dies engageable with said faces, a p-air'of plungers mounted tol reciprocate vertically over said dies, means for moving said plungers, and:

a guide adjacent which work; may bey placed arranged over said dies.

2. 1n a h-lankrng press, the combination with ar rigid frame, a horizontal shaft rota-v tably mounted at the base thereof, a second horizontal shaft mounted at the upper part of said frame, means for communicating power from one shaft to the other,4 a pair of verticalpl-ungers mounted on the upper I part of said frame, an eccentric on said upper shaft whereby'said plungers are given a reciprocative movement, a cylindrical.- die holder rotatably mounted -in the body of' said frame, a plurality of interchangeable dies engaged in said die holder, means for rotating said die holder wherebyV any` selected die may be brought into 'operative' position, and means for locking saidv die holder when in. an adjusted position.

3.1n a blanking press, the combination with a rigid frame, a die holder mounted therein, said die holder having a cylindrical central opening extending therethrough, a plurality of cutting dies engageable in-said die holder, a ratchet fixed upon said die holfder, a pawi engageable with the teeth ofl said ratchets, a foot lever whereby said paWl may be operated and means for locking said die holder when in an adjusted position.

4. In a blankingA press, the combination with a rigid frame, a rotatable, die. holder mounted therein, said die holder having a central cylindrical opening, a pluralityv of angular faces formed in said dieholder, means whereby said dies may be secured' therein, pedally operated means for rotating tably mounted at the upper end of said said die holder, means for locking said die frame, and an eccentric on said shaft operholder when in an adjusted position, a pair able within said ring whereby said plungers 10 of plungers mounted vertically at the head are caused to move reciprocatvely.

of said frame, a bar connection between the In testimony whereof I have aiixed my upper ends of said plungers, a ring having signature.

a lug engaged with said bar, a shaft rota- WAWRZYNIEC SKRZYNECKI.

Copies of this patent may be obtained for ve cents each, by addressing the Gommissioner of Patents, Washington, D. C.

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