US454455A - bbow-n - Google Patents

Description

(No Model.) 2 Sh eeeeeeeeee 1. G. A. BRO SPIKE MACH E. No. 454,455. Patented June 23,1891.

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GEORGE A. BROVN, OF RICHMOND, VIRGINIA, ASSIGNOR TO THE TREDEGAR COMPANY, OF SAME PLACE.

SPIKE-MACHINE.

SPECIFICATION forming part of Letters Patent No. 454,455, dated J une 23, 1891.

Application filed March 26, 1891.

T a/ZZ whom it may concern:

Be it known that I, GEORGE A. BROWN, a citizen of the United States, residing at Richmond, in the county of Henrico and State of Virginia, have invented certain new and useful Improvements in Spike-Machines, of which the following is a specification.

My invention relates especially to machines of the class in which spike-blanks are cut io from rods or ba-rs by dies carried by revolving shafts or rolls.

The object of my invention is to provide improved ineans for securely attaching the dies to the shafts and adjusting them to compensate for wear.

While my improvements are especially applicable to spike-machines, they may be used in other machines involving the use of cutting-dies which require adjustment.

In the accompanying drawings, Figure lis a longitudinal section through a shaft or roll, with dies secured thereto in accordance with my invention; Fig. 2, a transverse section on the line2 2 of Fig. l; Fig. 3, a section on the line 3 3 of Fig. l, but showing also part of an upper roll; Fig. 4, a section on line 4 4 of Fig. l, and Fig. 5 a detail view showing particularly the way of bracing or supporting the set-screw ring.

The shaft A is provided with a iiange A', and a die-carrying ring B, within a framering C, is located on the shaft on the inner side of the flange. The diesD are carried by the ring B in suitable recesses therein. In the drawings I have shown four dies carried by the ring, and between the dies and the inner wall of the recesses are interposed liners d, to hold the dies in proper working position and to compensate for wear on the ring C. The dies are held in the recesses in the ring B by set-screws E, carried by a set-screw ring E', encircling the shaft. Steel pins F have their shanks f seated in. sockets a in the shaft, and the upper ends of these pins form braces or abutinents for the ring E', which carries the set-screws. When the set-screws E are adjusted in the ring, they bear against the faces of the dies and hold them in position in their recesses in the die-carrying ring, the 5o pins F taking the back-thrust caused by the adjustment of the screws. As shown in the Serial No. 386,511. (No model.)

drawings, the pins F are formed with rearward extensions f above the surface of the rolls, whereby they may be readily taken hold of and removed from the sockets a. Then in use, however, the pins are held in the recesses by the ring E2, which fits over the shoulders]e2 above the shanksf.

Fig. 2 clearly shows how the bracing-pins and the adj usting-screw are arranged relative 6o to each other. It will be seen that there are four adj listing-screws and four bracing-pins arranged symmetrically around the shaft.

Fig. 3 indicates howa spike-blankis pointed l and severed from a bar. As is well known, 6 5 the wear on the dies is very rapid, and it is necessary to grind and adj ustthem frequently. Heretofore it has been usual to adjust the dies by placing metallic strips or liners be tween their inner ends and the inner walls 7o of the recesses or sockets in which they are placed; but this way of adjusting the dies is troublesome, and it is not reliable or secure, as by the use of a number of strips it is impossible to get a compact abutment for the dies, so that in operation they gradually fiatten out or force in the liners, and it results that the working ends of the dies do not come in suoli close proximity as they should in order to sever the spike-blank from the metal- 8c lic rod or bar and produce a clean cut sharp point. In accordance with my invention I employ adjustable wedge-shaped supports for the inner ends of the cutting-dies.

In order to carry out my invention in the way illustrated in the drawings, I form a series of longitudinal recesses g in the shaft A and corresponding openings in the die-carry ing ring B and the flange A. The inner walls of these recesses and openings are in- 9o clined frointhe outer side of the iiange A downwardly, and preferably the openings are made wide, so that the wedges G may be made correspondingly wide to ext-end from one side of the die to the othenavs illustrated in Fig. 3. I have shown four wedges G, one for each of the dies, and each is provided with a screw-threaded shank G', which extends through the opening in the ange A and carries an adjusting-nut G2. Recesses a roo are formed in the shaft A to accommodate the nuts, so that they may be adjusted readily, and at the same time permit the shanks G to lie fiat against the inner walls ofthe recesses g. Thewedges G are so formed that their outer faces or the faces which bear v against the inner ends of the dies are straight and parallel with the axis of the shaft, while their under sides have the same inclination as the inclined inner walls of the recesses. lBy this arrangement the outer sides of the wedges are always parallel with the axis of the shaft no matter what be the extent of their longitudinal adjustment. In Fig. l I have shown the upper die resting against the inner end of the wedge G and the lower die resting against the outer end. It will be seen that the upper die is in this caseV longer than the lower one. Therefore the lower one needs more adjustment, and theiv wedge compensates this deiiciency and holds l the lower die in the same position at its outer or cutting edge as the upper one. The diesi` may therefore be adjusted to any desired" extent by adj usting the nutsGr2 and the setscrews E, and the arrangement is such that the dies may be readily removed and quickly replaced. I will state, further, that while the wedges are designed to take the place of liners, liners may be used in connection with y them, if desired. The flange A is preferably made of wrought-iron and attached to the; shaft in any suitable way. The ring,r C is of e cast-iron strengthened by a band c, shrunk around it. Unless otherwise specified, thel parts are of usual construction. l

I claim as my invention-- l. The combination, substantially as hereinbefore set forth, of radially-adjustable cutting-dies, a flanged shaft or roller to which they are attached, wedges forming supports for the inner ends of the dies and arranged in inclined recesses in the shaft, and means for adjusting the wedges toward the ange of the shaft to move the dies outwardly rela tively to the axis thereof.

2. The combination, substantially as hereinbefore set forth, of the fianged shaft, the die-carrying ring attached thereto, radiallyadjustable cutting-dies mounted therein, adj usting-screws for holding the dies in said recesses, the screw-carrying ring, and the brace-pieces removably connected to the shaft and forming abutments for the screw-carry ing ring.

3. The combination, substantially as hereinbefore set forth, of a .shaft or roll, a diecarrying ring, adjusting -'sc1ews bearing against the dies, the ring in which these screws are mounted, and the steel abutmentpieces removably seated in recesses in the shaft and having their upper ends in contact with the screw-carrying` ring.

In testimony whereof I have hereunto subscribed iny name.

GEO. A. BROWN.

lVitnesses:

E. R. ARCHER, J. R. A. HoLsoN.

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