US408294A - Swag ing-machine - Google Patents

Description

'* lln'rrnn stares LATENT OFFICE.

lVILLlAM I-I. DAYTON, OF TORRINGTON, CONNECTICUT.

SWAGING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 408,294, dated August 6, 1889.

Application filed November 24, 1888. Serial No. 291,829. (No model.)

To all whom it may concern.-

Be it known that I, VILLIAM H. DAYTON, of Tlorrington, in the county of Litchiield and State of Connecticut, have invented an Improvement in Swaging-Machines, of which the following is a specification.

Letters Patent have heretofore been granted to me for a machine in which there is a revolving head upon a tubular mandrel, and this revolving head is within a stationary circular shell, there being a row of rollers between the revolving head and the interior of the circular shell, and in the revolving head there is a transverse channel containing dies and die-stocks, the outer ends of the stocks coming into contact successively with the rollers and forcing the dies toward each other for swaging the rod, wire, or other article placed between the inner grooved ends of the dies, and these grooves in the inner ends of these dies are half-circles, that flare outwardly or are trumpet-shaped at the entrance side for the rod or wire, and a swaging-machine of this character will be seen in Letters Patent Nos. 268,874, December 12, 1882, and 376,144, January 10, 1888.

In using this machine I have experienced a difficulty resulting from the flaring or trumpet-mouth portion of the dies tending to force the rod or wire baekwardly; hence the reduction in the size of the rod can only be very gradual; otherwise the inclined action of the dies is so powerful that the attendant cannot prevent the rod being moved backwardly.

The object of my present invention is to prevent the rod being forced backwardly'as the dies are closed, and to make the feeding operation self-acting or automatic, if so desired, and to allow for a greater reduction for each compression than in the swaging-machines heretofore used.

In the drawings, Figure 1 is a vertical sec tion of the two dies made use of by me, on an enlarged scale. Fig. 2 is an elevation of the the dies C C and followers 0 C. These dies C C are to be grooved in their adjacent inner faces, and this groove is the segment of a circle, or nearly so, in each die, and it flares or tapers outwardly at the entrance side; but instead of the surfaces of the grooves being smooth, as heretofore usual, I make use of internal corrugations, as shown at 2 2, so that said corrugations act to indent the metal of the rod or wire as the reductions are being made, and the inclined or flaring portion of the die will not slide upon or force back the tapering or conical portion of the rod or wire that is being reduced. Thereby the compressing action of the dies will be rapid and uniform, and the attendant has simply to press the rod or wire toward the dies as they revolve or swage or reduce the metal to the proper size for passing into orthrough the dies.

that these dies C and the head N are revolved by power, and the dies are alternately opened and closed. If, therefore, the corrugations 2 upon the flaring portions of the dies are inclined similar to screw-threads, the revolution of the head and dies causes such dies to act like a screw to drawin the rod as it is reduced, and thereby the feed of the wire is made antomatic, the rod not being revolved, but simply held in the hand of the attendant as it is passed endwise into the machine. There is little or no tendency of the screw-threaded dies to revolve the rod or wire, because such dies open easily and slide over the conical portions of the wire where the reduction is taking place between one compressing action and the next. It is to be understood that these corrugations, whether peripheral or screw-formed, may die out or be removed before reaching the portions of the dies that finish the surface of the reduced wire or red, as seen in Fig. 1, so that the surface of the finishedarticle is not corrugated or injured; but where the reduction is required to be Very rapid and the finish upon the surface of the reduced portion of the rod or wire is immaterial-such, for instance, as in the pointing of rods'to be drawn through dies-the corrugations or ribs may extend more or less into the portions of the dies where the opening is of It will be observed by the aforesaid patent i the smallest diameter. This is illustrated in Fig. 3, where the opening between the dies is tapering and the inclined or screw-thread corrugations extend all through the dies.

I claim as my invention- 1. The reducing or swaging dies having corrugations or ribs at the conical or flaring portion of the opening between the dies, substantially as set forth.

2. The swaging or reducing dies having an opening through between them and provided with screw-threaded ribs or corrugations in the surface of the metal at the tapering portion of the opening, substantially as set forth.

3. The combination, with the revolving head N, having a transverse groove, of the dies C within such groove, there being a central opening through between the said dies,

-which opening is tapering or flaring at the entrance side for the article to be operated matically by the revolution of the dies, sub- 25 stantially as set forth.

Sign ed by me this 3d day of November, 1888.

W. H. DAYTON. Vitnesses:

ISAAC W. BRooKs, JOHN N. BROOKS.

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