US1195222A - Ments - Google Patents

Description

H. C. HERR. MACHINE FOR FORMING EXPANDED METAL.

APPLICATION FILED IAN:- 6, I912. 1,195,222

Patented Aug. 22, 1916.

3 SHEETS-SHEET I.

mumm H. C. HERB. MACHINE FOR FORMING EXPANDED METAL. APPLICATION man JAN. 6. 1912.

1 1 95 2. I Patented Aug. 22, 1916.

3 SHEETS-SHEET 2.

' 8 is a plan view citizen of the United HENRY MENTS, TO SOUTH SIDE TRUST e. HERB, or rrrrsnunen,rnnnsvnvenm, essrcnoa, BY MESNE assrencomrm, 'rnus'rnn, or rrrrsnuacn, PENNSYL- VANIA, A. CORPORATION OF .PENNSYLVANIA.

Application filed January 6,

To all whom it may concern:

Be iknown that I, HENRY C. HERB, a States of America, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Forming Expanded Metal, of .which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates forming expanded metal and consists in various features of construction as hereinafter set forth.

In the drawings,-Figure 1 is a side elevation of the machine; Fig. 2 is'a plan view thereof; Fig. 3 is an end elevation; Fig. 4 is an enlarged elevation showing the engagement of the slitting rolls; Fig. 5 is an enlarged cross section of the rolls; Fig. 6 is an enlarged cross section showing the drawing rolls; Fig. 7 is a cross section showing the gripping jaws for expanding the sheet; Fig. thereof; Fig. 9 is a view similar .to ferent adjustment;Fig. 10 is a side elevation of Fig. 9; Fig. 11 isa side elevation of the cam controlling the ipping jaws; Fig. 1% is a plan view of the lank after the first slitting operation; Fig; 13 is a similar view of the blank after the second slitting operation.

The machine is particularly designed for the formation of expanding metal in which a portion of the blank remains unaltered in dimensions but is adjacent to and integral with an expanded portion of the sheet. This necessitates the drawing or elongation of the strands forming the expanded portion of the sheet to compensate for the natural contracting efiect on the length of the sheet due to the lateral expansion thereof. In other words, in the usual process of expanding a stranded sheet the blank is contracted longitudinally as it is expanded laterally, but this would not permit of leaving any portion of the sheet unexpanded, for the obvious reason that such portion would be buckled or crimped by the longitudinal con traction of the sheet. Such an effect is overcome in my .im roved machine by the operation of means or elongating the strands and by the association of such means with the lateral expanding mechanism.

to machines for.

Fig. 7 showing the parts in dif- TEAOHINEFOR FORMING EXPANDED METAL.

Specification of Letters Patent. Patented Aug. 22, ighfio 1912. Serial No. 669,881.

Another novel feature of my improved machine is the construction for forming the stranded sheet by successive slitting operations.

In detail, A is a suitable frame work upon the forward end of which is mounted 'the sheet stranding mechanism. This stranding mechanism comprises two pairs of slitting rolls B, B and G, C which successively operate upon the sheet as it is fed therebetween. The rolls B and C are provided with alternate rings and rooves and the rolls B and C are provided with corresponding rings and grooves, the rings being however, divided into segments 1) by interruptions D. These segments D engage the grooves of their corresponding rolls Band C and in the operation of passing a sheet metal blank therebetween, each segment will slit and depress a strand, while the interruptions will leave unslitted bonds. The spacing of the rings and grooves is such as to produce by each pair of rolls, slits separated from each other by the width of strands, while the slits produced by the rolls O and C are midway between the slits produced by the rolls B and B, and the bonds produced by the respective pairs of rolls are likewise spaced longitudinally midway between each other.- Thus after the sheet has passed the second pair of rolls it is properly stranded for expansion.

In addition to the intermeshing rings and grooves on the rolls B, B and C, 0', each of said rolls is provided with a portion in rolling contact with'the corresponding portion on the companion roll, the radius of such portion being less than that of the rings and more than that of the bottom of the grooves. As shown, E and E are the peripheral contacting portions on each pair of rolls, these being arranged at opposite ends and ada ted to leave u on opposite metal blan marginal bands which are unslitted.

The expanding mechanism comprises means for drawing the opposite edges of the sheet in opposite directions and associated means for elongating the strands so as to avoid any contraction in the length of the blank or any crimping stress on the unstranded marginal portions thereof. For expanding or enlarging the sheet laterally, I

sides of the s eet preferably employ a series of gripping devergent planes and are vices whichengage with the margins of the sheet and which travels forward therewith but in divergent planes. The specific construction is illustrated in Figs. 7 to 10 and com rises a pair of chains F which travel longitudinally of the bed or frame A in disprings G. These chains are rovided at suitable intervals with grippers comprising a laterally extending aw member H fixed to the chain, and a pivoted jaw member H which in one position will grip with the jaw H to engage the sheet. The jaw. member H is preferably also provided with a pin H for perforating the marginal portion of the sheet and passing into 'engagement with a recess Hin the jaw member H thereby forming a with the sheet. The p votal jaws H are actuated by rolls I thereon which travel in engagement with a groove way J mounted upon a frame of the machine, While the chain F is guided bygrooved rolls K and K also engaging groove-Ways in the member At the point where the stranded blank first comes into engagement with the chains J, the roll I is in engagement with the cam portion J of the guide, which swings the jaw H into the position shown in Fig. 9. As soon however, as the blank is in engagement with the under jaw H the jaw H is swung downward by the cam J until the pin H engages and perforates the sheet, as shown in Fig. 7 The divergent movement of the chains will then draw the opposite jaws of the sheet butward and cause the lateral expansion.

The longitudinal elongation of the strands is preferably effected by successive operations occurring at intervals in the lateral ex pansion. As shown, a series of rolls L, L, etc., are arranged transversely across the machine above and below the stranded sheet and intermediate the unslitted marginal portions thereof. The length of these rolls 1s progressively increased toward the rear end of the machine and the last rolls L are of sufiicient length to include the marginal bands as well as the stranded portion. The slitting operation will cause a certain degree of elongation in the strands, and therefore, the sheet when first engaged by the jaws H and H will be expanded laterally to take up this elongation before reaching the first: air of rolls L. In passing between these rol s the strands are further elongated, providing sufficient slack for the next expansion operation at the completion of which the second pair of rolls L engages the strands and further elongates them. Thus the operation is repeated until the full width of expansion is obtained, after which the entire sheet including the u'nexpanded margins, passes between the rolls L, pressing it into a single plane.

operated by suitable said rolls to As has been pivotal engagement the longitudinal advance,

At the rear end of the frame the jaws H? are again released bythe rolls I thereof on.

J of'the track and the released sheet is fed out from the gaging another cam portion machlne.

The rolls L, L, etc., are driven at the proper speed through suitable mechanism such as the spiral gears M which connect a longitudinally extending drive shaft N and spiral gears 0 connecting the shaft N to the slitting rolls B and C.

stated the grippersH have a plvotal engagement with the sheet by reason of the pin engaging a recess H. This provides for adjustment necessary by the slight warping of the sheet in expansion and avoids danger of tearing.

What I claim as my invention is:

1. In a machine for expanding metal, the combination with means for progressively laterally expanding a stranded sheet, of means operating successively during the progressive expansion for elongating the strands of said sheet to compensate for angular movement thereof without contraction in length of the blank.

2. In a machine for expanding metal, the combination with means for stranding a sheet leaving portions thereof unstranded, of means for laterally expanding the stranded portion of the sheet during the longitudinal'movement thereof, and means operating upon the strands during their longitudinal movement to elongate the same and compensate for the angular movement thereof.

3. In a machine for expanding metal, the combination with means for advancing a stranded sheet, of means operating during the advance of said the same, and a series of drawing rolls successively operating upon the strands of the sheet prior to the completion of the expansion to elongate the same and compensate for their angular movement.

4. In a machine for expanding metal, the combination with means for advancing a stranded sheet, of means for laterally expanding said sheet in the same plane during and a series of progressively increasing length operating u on the strands prior to the completion of t e expansion to elongate the same and to compensatefor the angular movement thereof.

drawing rolls of ,5. In a machine for expanding metal, the

combination of a pair of divergently moving earners, a series of grippers on said carriers for successively engaging with the op osite sheet to laterally expand a longitudinally menses i 6. In a machine for expanding metal, the combination of a pair of divergently moving carriers, a series of grippers on said carriers for successvely engagingvwith the opposite margin of a stranded sheet to simultaneously feed and laterally expand the same, each of said grippers comprising a pair of jaw'members arranged upon opposite sides of the sheet, and a pin on one member for perforating the sheet and engaging a recess in the other member, forminga piv- I otal engagement.

7. In a machine combination with divergently moving-carriers, of a series of grippers upon said carriers each comprising a pair of jaws passing respectively below and above the sheet to be expanded, a pin upon one of said members for perforating the sheet and engaging a recess in the other member, and means for moving the pin member into and out of engagement with said sheet at the opposite ends of the carrier.

8. In a machine for expanding metal, the combination With means for successively engaging with the opposite margins of a stranded sheet to simultaneously longitudinally feed and laterally expand the same, of

a series of drawmg rolls successively operating upon the strands intermediate said margin engaglng means prior to the completion of the expansion to elongate the same and compensate for thereof.

9. In a machine for expanding metal, the combination with means for expanding a stranded portion of a sheet intermediate unstranded portions thereof, of means engaging the stranded portion of the sheet for equalizing the length of the stranded and unstranded portions thereof.

10. In a machine for expanding metal, the combination withmeans engaging the unstranded marginal portions of a stranded sheet for laterally expanding the stranded the angular movement for expanding metal, the

I operations,

of the expansion portion and means successively operating upon the. strands for elongating the same.

11. In a machine for expanding metal, the combination with means for laterally expanding a stranded sheet in the same plane,

of means successively operating upon the strands of the sheet prior to the completion of the expansion to elongate the same and to compensate for the angular movement thereof. v

12. In a machine for expanding metal, the combination with means for expanding a stranded portion of means for elongating the strands prior to the complete expansion thereof by a series of operations.

13. In a machine combination with means engaging the unstranded marginal portions of a stranded sheet for expanding the stranded portion by a series of operations, of means operating upon the strands previous to the completion thereof for elongating the same by a series of o erations.

14. In a machine or expanding metal, the combination with means for simultaneously laterally expanding and longitudinally feeding a stranded portion of a sheet, of successive means operating upon the strands of said sheet to elongate the same and to compensate for the angular movement thereof.

15. Ina machine for expanding metal, the combination with means for progressively laterally expanding a stranded sheet, of positively rotated rolls operating successively during the progressive expansion for elongating the strands of said sheet to compensate for angular movement thereof without contraction in length of the blank.

In testimony whereof I afix my signature in presence of two Witnesses.

' 1 HENRY C. HERB. Witnesses:

C. C. Monnrson, E. F. Rrrnnopa of a sheet by a series of for expanding metal, the

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