US200595A - Improvement in machines for bending tubular sockets - Google Patents

Description

2 Sheets-Sheet. 1.

J. HgALKBR. Machine for Bending Tubular Sockets.

No. 200,595. Patented Feb. 26,1878.

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2 Sheets-Sheet 2.

. J. H. ALKBR. Machine for Bending Tnbular'Sockets.

No. 200,595. Patented Fb.*26, l878.

UNITED "STATES Pn'rnlv'r OFFICE.

JOHN H. ALKER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO JONES &

LAUGHLINS, OF SAME PLACE. I

|MPROVEMEN T IN MACHINES FOR BENDING TUBULAR SOCKETS.

Specification forming part of Letters Patent No.'200,595, dated February 26, 1878; application filed December 5, 1877. I

To all whom it may concern:

Be it known that I, JOHN H. ALKER, of Pittsburg, county of Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvement in Machines for Bending Tubular Sockets; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawing, making a part of this specification, in which-like letters indicating like parts Figure 1, Sheet 1, is a perspective view of my machine from the feeding side and contiguous end. Fig. 2, Sheet 2, shows a plan view of a portion of the operative devices and a horizontal sectional view of the mandrel and dies which complete the bend. Fig. 3 is a like view of the latter dies, the mandrel, and blank in the position they occupy at the completion of the bending operation. Fig. 4 shows a vertical longitudinal section of the principal operative parts of the machine. shows a blank sheared off ready for bending, and Figs. 6 and 7 show the results of the first and second bending operations.

My improved bending-machine is designed for shearing and bending or shaping short tubular metallic articles, such as collars, rings, sockets, and thimbles, preparatory to welding and finishing, which latter operations are done in a separate machine and at a subsequent eat.

A frame-work of any suitable construction is shown at A, a cranked driving-shaft at B, and a connecting-rod at B. The latter is jointed at D to a cross-head, D which latter operates a reciprocating rack, D, which is toothed on both sides, and the teeth of this rack mesh into the segmental oscillatory gearwheels b b, each mounted on an axial stem, 12'. A pair of oscillating die-blocks, d 61, each carrying a bending-die, at, having a U-shaped face, are made fast to the gear-wheels b b. The rack D is held in its properline of motion by a rigid connection to the cross-head, D and the latter is properly held and guided by a dovetailed slide, h, on its under face, working between and under the guides h.

The shaft B, by an additional crank, B and connecting-rod B transmits an intermitting Fig. 5

oscillatory motion through crank G to a shaft, G, at the opposite end of the machine. I This shaft carries and operates a cam, 9 which latter gives an intermittingly forward stroke to a shear-block, g, such shear-block moving in slides or ways, and carrying on its forward end a shear, s. V A counter-shear affixed to one,

c, of a pair of formers, c c, is represented at 8 is imparted by a spring, g and rod-connection 9 Apair of formers (represented at 0,0)

by any suitable means, as indicated at 8 so that the length of the blank may be varied at pleasure.

The forward end of the rack D carries a mandrel, e, the lower end of which is of the size and shape of the socket-eye, and which at the time of feed is forward, or to the right of the plane of feed. The bar then being fed in between the shears, the latter cut off the blank m, and the back-stroke of the rack begins. The lower projecting end of the mandrel 0 engages the blank at or about the middle of one side, and, carrying -it back between the formers c 0, brings it to a U form, as shown at n in Figs. 2 and 6. The same back-stroke of the rack also shifts the dies at d from the position shown in Fig. 1 to that shown in Fig. 2. A

continuation of the same motion carries the blank n past the rear ends of the formers c c, and also brings the dies d 01 around, so that they shall encompass the blank laterally, and close in on the arms of the U-shaped blank, and bend them around the mandrel, as represented at n, Figs. 3 and 7 giving either a butt or lap joint, as may be preferred, provision having been made accordingly in the shearing operation; and, if desired, one die maybe so shaped as to close in one arm of the U a little in advance of the other when a lap-j oint is to be provided for. With the next forward stroke of the rack the gripe of the dies d will be released, and the blank n will fall OK the The reverse motion of the moving shear mandrel through a slit, f, in the-frame of the -machine,- or it will otherwise be forced off by a forked stripper, a, which is pivoted to a post, f and held up by a spring, f, in such position that with such next forward stroke of the rack the prongs a will enter between the underside of the rackand the top end of the socket-blank, and force the'1latter downjward off the mandrel, the mandrel passing into the crotch of the stripper-prongs a; but

more perfectly to secure this stripping effect,

I pivot an outwardly-swinging toe, a t0 the end of the rack, and in such position that after the stripper-prongs a have engaged the blank the toe an, operating onan incline, a on the stripper a, will depress the stripper-prongs a, as indicated in Fig. 4, and so strip off the blank. When the rack Dagain moves back to bend another blank the toe to swings out- -wardly over theinclinea, so as not then to depress; the stripper.

1 The described machine, by suitablechanges in the-form of the -mandrel and di6S,- G&Ilb6 readily adapted to bending and shaping metallic rings to be weldedonto shanks or stems of tools, so as to form shoulders or collars thereon; also, for shapingand bending chainlinks and similar articles.

-Where scarfed and lapped ends are required, the form orcutting stroke of the shears. may

.be varied to accomplish. such end, and these, .as well as all. other similar 1 modifications of hereinaftersetforth, except that mechanical equivalents are included.

I claim herein as my invention- 1. A reciprocating toothed rack, D," for com- -1nunicating an intermittent oscillatory motion in opposite directions, through gear-wheels b b, to a pair of U-faced bending-dies, d d, in combination with shears m formers 0 0, "and mandrel e, substantially as set forth.

2. Dhe -stripper at, having wedge -shaped prongs a and an incline, a inco1nbination with the swinging toe-aattached to the rack,

substantially as set'forth. a

In testimony whereof I have hereunto set my? hand.

y QJOHNRALKER.

Witnesses:

J l J. MoOoRMIcK, OLAUDIUs L.- PARKER.

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