US1379005A - Machine for automatically edging, perforating, and cutting off strips of metal - Google Patents

Description

C. A. ELIGH.

MACHINE FOR AUTOMATICALLY EDGING, PEHFORATING, AND CUTTING OFF STRIPS 0F METAL.

APPLICATION FILED UEC.5, T916.

1,379,005. Patented May 24,1921.

4 SHEETS-SHEET I.

C. A'. ELIGH.

MACHINE FOR AUTOMATICALLY EDGING, PERFORATING, AND CUTTIING OFF STRIPS 0F METAL. APPLICATION FILED DEC.5| 1916-.

1,379,005. y Patented May 24,1921.

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MACHINE IFOR AUTOMATICALLY EDGING, PERFORATING, AND CUTTING OFF STRIPS 0F METAL. APPLICATloN FILED 0505.1916.

1,379,005. Paented May24,1921.

4 SHEETS-SHEET a.

FIG 4.

CLA. EuGH.

MACHINE AUTOMATICALLY EDGING, PERFONATING, AND CUTTING OFT STRIPS 0F METAL. APPLICATION FILED DEC'5, 1916.

l 1,379,005. Patented May 24,1921.

4 SHEETS-SHEET 4.

UNITED STATES COMPANY, OF DETROIT, MICHIGAN, A CORPORATIN F MICHIGAN.

lPATENT OFFICE.

CHARLES A.A ELIGH, OF DETROIT, MICHIGAN, ASSIGNR T0' LONG MANUFACTURING MACHINE ron nuroiilriiricALLY EDGINarERroEATING, AND comme oFF sriurs or METAL. i

Specification of Letters Patent. Patented May 24, 192L Application mea necemter 5, 191e. serial No. 135,1'02.

T0 all whom fifmag/ concern Beit known that I, CHARLES A. ELIGH, a citizen of the `United States, residing at Detroit, Wayne county, Michigan, have invented certain new and usefulmprovements in Machines for Automatically Edgin ,Peiieta of which the following is a full, clear, and v foi-ating, and Cutting Off Strips of exact description.

While my invention is adaptable to a va` riety of purposes Ihave shown it as applied to the manufacture of fins for automobile.

, radiators. device here disclosed con- ',sists of a machine, on one end of which is and a coil'of wire.

mounted a coil of thin narrow sheet metal` The metal is drawn through a series of bending rolls whereby one edge of the strip is folded over and rolled down flat, while the other ledge is folded around wire drawn from the coil.

After the edges are thus strengthened the metal passesbetween rotating die-members f and is perforated. These die-members are in fact the means 'by which the metal is carried through the machine, and as ythe-perforating'punches pass through and remain in the metal while the die-membersrrotate through a substantial arc, and as some'of the punches are always in the metal, the metal is positively propelled; e., much as though the metal Wereja rack and the punches teeth of la driving gear. The die-members rotate intermittently and betweenperiods of rocompleting a fin.

tation, while the metal is stationary, xa shear running out a predetermined lengthf of metal between strokes of the shear and adjustments areprovided for centering the perforation s,.

so there will be the same distance between the last holes'and each end of the n.A The I positive. feed afforded by the perforatin 4traverses the` machine.

mechanism enables the edgesto' be -folde and onev of them wired withbut a few 'opeiut-- tions, and it insures uniformity of the fins as tolength, notwithstanding the numerous operations performed on `the metal las it In the accompanying drawings, v. Figure 1 is a side elevation ofmy fin making"machine,' and i Fig. 2 is a plan thereof. n Fig. 3 is a fragmentary view of the perforating mechanism.

` eans are provided for by the base .a pair of .uprig radially-2 a 7 is a' fragmental section on line 7-7,

on which are journaled shafts 27 and 28 '(Fig. 5). Shaft 27 has rigidly secured to it a drum 29 which is studded with punches 30. A drum 31 is rigidly secured to shaft `28, this drum 'having apertures 32 adapted to register with, and receive the punches 30 as the drums rotate, the two drums therefore constituting respectivelythe male and female members of a rotary perforating die. The drums are. compelled to rotate .at a uniform velocity ratio by a pair of timing lgears 33 and 34 secured respectively to shafts 27 and 28. Outside but next tovone of the frames 26 a ratchet wheel 35 is rigidly secured toshaft 27, and next to this wheel an arm 36 is loosely mounted on the shaft. A pinion 37 is rigidly attached tol arm 36 and adapted to rotate on the shaft in unison with the arm. The arm carries a pawl 38 which engages the teeth of the ratchet wheel.- A rack 39 mounted in a suitable guide carried 25, meshes with thepinion, and as the rack At a suitable distance from/the frames 26 hts 50 are mounted on the base 25,v in which is journaled a shaft 51.

This shaft is 'adapted' to rotate constantly,

and is equipped with the ordinary tight and loose pulley for belt driving. Outside of one upri extending! radially is a guide frame 53 in which a wristpin`54 isarranged to move screw 55 serving to move it and to ght 50 the shaft carries a rigidly atv tached disk 52. On one side of this disk and is reciprocated the dies are ro- ,-tated intermittently by the pawl and ratchet los hold it in the required position. A pitman 56 connects the wrist pin to'L the rack. The

length of the ypitman may be varied bymeans of a turnbuckle 57 intermediate its ends. A cam 58 mounted on shaft 51 engages the free end of a lever 59, which is pivotally attached to the base 25, and through a connecting rod 60 operates a band brake 61 (Fig. 1), the brake band encircling a brake wheel 62 rigidly attached to shaft 27. A shear blade 65 is carried by a frame 66 which is arranged to reciprocate vertically in guides formed in uprights 50. This frame is reciprocated by eccentrics 67 onshaft 51 and pitmen' 68. Means (not shown) is provided for adjusting the position of the eccentrics on the shaft so the movements of the shear blade will be properly timed with reference to the movements of other gparts. Two laterally extending arms 69 attached to the frame carry a pressure bar 70, the attachment of the bar consisting of two rods 71 fixed to the bar and extending upward through aperturesin the arms 69, with nuts 72 screwed on their upper ends. Springs 73 encircling the rods and confined between the arms 69 and bar enable the bar to maintain a yielding pressure for a purpose hereinafter set forth.

A table 80 connects and is supported by frames 26 and uprights 50 and at `one endv of this table is secured the stationary shear blade 81. One edge of the table is stiffened by a flange 82, between which and an adjustable guide 83 the strip of metal is carried from the perforating dies tothe shears,

where it is cut to lengths: The sheet metal is supplied from a reel 84 carried by uprights 85, and after passing through guides 86 (see also Fig. 6,) the metal passes between a pair of rolls, 87-88, which turn both edges upward. These rolls are so well illustrated in Fig. 7 that but little need be said of them except that one of the beveled flanges 89 is made adjustable on the roll 88 to accommodate metal of different widths. In like manner the flange 90 is adjustable on the roll 87.` The metal next passes between rolls 95 (see Fig. 8). Each of these rolls has a groove 96 through which the turned up edge of the metal passes and whereby the edge is' turned over so as to .overhang the body of the sheet, as shown in Fig. 8. One of these rolls is movable in a slot 97 f or adjustment. -Themetal next vpasses between rolls 100 and 101 whereby the edges are rolled down to final position (seeFig. v9).` A' wire 102 from reel"103 passes one of the lguides 86 and as will be seen 1n Figs. "7,8 and 9 this wirel is gradually.inclosed in the turned over edge. A Roll 101 has a groove -104 which accommodates the Awired edge and at the same time rolls it down closely around the wire.

The operation of the machine is almost obvious froml the foregoing description.-

Figs. ,l and 2 show the perforated metal passing through the machine. The disk 52 Vpressed against the table.

rotates in the direction shown by an arrow in Fig. 1 and the dies are therefore rotating. Their rotationwill continue until the wrist pin 54 reaches dead center which it has nearly reached in this figure. j After passing dead center the rack will move in the reverse direction and the pawl 38 will pass idly over the teeth of theratchet wheel. The timing is such that the brake comes into action after the wrist reaches dead center, and stops the rotation of the die members. Then the pressure bar 70 is brought down on the metal a little in advance of the shear blade and as the frame 66 continues to descend the sarings yield, their pressure being exerted to iold the bar down on the metal, which is thus firmly Thile so held the shear blade descends and cuts ofi the protruding end of the metal. As seen in Fig. 3 there are always several of the punches in the metal and the metal is therefore propelled positively, preventing slippingof the metal and consequent inequality in the lengths of metal cut olf which might occur were the metal moved by friction. The importance of this positive drive for the metal maybe appreciated when it is remembered that the edge forming devices tend considerably to retard the metal. Operating the pawl arm 36 by a rack and 'pinion'has the advantage that there is practically no limit tothe distancethe dies may y be rotated; they may -be" rotated a Whole revolution, or even more, if desired.4 This could not be done were the pitman connected directly to the'arm 36. By means of the adjustable wrist pin fins of any desired length may be made and the turnbuckle in the pitman permits the shearing to be done at any desired point, say midway between two rows of holes. It will be noted that the female die-member 31 has several cncentric grooves 110. These are to accommodate the wired edge, so that the punches can pass through the metal and enter the holes 32 without being excessively long. Notches 111 in the pressure-bar ,70 are to `enable the bar to rest on the body of the work advancing die members, one-.of said members being studded` with punches and the other correspondingly apertured for engagement by said punches, means for intermittently driving said rotary members in l accurately timed relation, 'and means for actuating relation, edge-forming means the same during the inter-missions of rest of said die members. Y

2. A machine lfor forming and punching sheet metal, comprising a pair of rotary work-advancing die members, one of said members being studded with punches and the other correspondingly apertured for engagement. by sald punches, means for driving said rotary members in accurately timed engageable with the Work in advance of said rotary members, and means for cutting the work into predetermined lengths.

3; AA machine for punching and forming sheet metal, comprising a pair ofrotary Work advancing die members, one of said members being studded with punches andthe other correspondingly apertured -for engagement by said punches, means for driving said rotary members intermittently and in accurately timed relation, and meansfor varying the intermittent angular advance of the rotary members. c' j 4. A machine for punching and forming sheet metal, comprising a pair of .rotary work-advancing diel members, one of said members being studded with punches and a shearing blade,

1 drive mechanism the work advancing members 1n a, constant the other correspondin ly apertured for engagement by said punxes, a rack and pinion drive mechanism Jfor said rotary members, means for 'reciprocating said rack and means for varying the stroke of the rack,

I pawl and ratchet means for driving the rotary members intermittently in a constant direction from said rack and pinion mechanism, and means for shearing the work during the intermissions of rest of said rotary members.

5. A machine for punching and forming sheet -metal, comprising a pair of rotary work advancing die members, members being studded with punches and the other correspondingly apertured for engagement by said punches, a step by step for intermittently rotating direction, means for varying the rotative feed of said members and means for shear` ing thewo'rk during the intermissions of resto said members.

` In testimony` whereof I affix' my signature.

in the presence of two subscribing witnesses.

CHARLES A. ELIGH. Witnesses:

J. VERNON KEMP, J. LESTER DRYDEN.

one of said

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