USRE12515E - Reissued july - Google Patents

Description

- REISSUED JULY 31, 1906.

0. BRIEDE. PORGING MACHINE. APPLICATION I ILED MATH, 1904.

2 SHEETS-SHEET 1.

I m vsu'ron CQ Q-CLQQAm's h 0. 'BRIEDE PORGING MACHINE.

APPPIOATION FILED MAY 17. 1904.

2 SHEETS-SHEET 2 WITNESSES: IPQVENTOR fi zim UNITED sTATEs PA'IENT OFFICE.

FOHGlNG-MACHINE.

Specification of Reissued Letters Patent.

Iteissued July 31, 1906.

Original No. 741,301, dated October 13, 1903. Application for reissue filed May 17,1904. Serial No. 208,394.

To all whom it may concern.-

Be it known that I, OTTO BnIEnE, a subject of the King of Prussia, German Emperor, and a resident of Bcnrath, near Dusseldorf,

' in the Province of the Rhine, German Emproved forging-machine, by means of which any kind of figured bars or tubescan be man- .ufactured.

My invention is represented in the accompanying drawings, in which- Figure 1 shows a vertical section of the machine. Fig. 2 is a front view of the same. Fig. 3 is a vertical section in another position with the piece to be forged within the same.

In the machine-frame a two sector-formed parts b and c (commonly known. in the art as swaging-dies are pivoted at Ir and Z, either by means of bolts or by means of the wedge-shaped edge of the same being situated within grooves provided in the frame a, as shown in the drawings. These two parts I) and c are connected to each other by means of toothed bars r,'so that in case one of the sector-formed pieces I) or c is oscillated the other one oscillates in the same direction. To one of the parts I) and c a connecting-rod f is pivoted, which connecting-rod connects this part with a crank e, fixed to a shaft '5. This shaft i can be rotated in a convenient manner. Those surfaces of the parts 7) and'c facing each other are provided with grooves of, the form of which corresponds to the form of the bars or tubes to beforged. he diameter of these grooves between the points g g is the same all over, while at h [L2 h h the diameter of the grooves gradually enlarges. Now in case the piece u, Fig. 3, to be forged is brought into these grooves durin' the time the pieces I) and c are oscillated tFliS piece a will by the oscillation of the arts l) and c be ressed into the form which t e rooves have etween the points 9 g. It wil be under stood that in the space between the points h and h the forging proper takesplace, while in the space between the points 9 g the piece is flattened and smoothed. In case a pipe shall be forged a mandrel s can be used, as shown in Fig. 3 of the. drawings.

Now in order to attain that it is not necessary to change the arts 1) and c in case figured 55 bars or tubesof ifferent diameters, but ofthe same form, shall be forged the following arrangement is provided: The bearings m for the crank-shaft i are not rigidly attached to the frame a of the machine, but are movable to and fro in. guides n, provided in the foundation-plate of the same. The moving of the bearings is effected by means of a spindle 0, jouri'laled at p, the threads of which spin dle engage inv a nut n, rigidly attached to the bearings m, so that by turning thespindle the bearing m is moved. The turning of the spindle is effected by means of a hand-wheel g or in any other convenient manner.

Now in case the bearing m is moved in the direction of the arrow t, Fig. 1 the effect of the operation of the machine is changed on account of another part of the grooves (1 coming in contact with the piece 11, to be forgcdthat is to say, instead of that part of the grooves situated between the points 9 9 coming in contact with the piece a to be forged at the end of each 'return stroke the points h or h em, of the same will be in contact with the piece a at the end of each stroke, so that the part between thopoints g 9 does no more eon'icin contact with the same at all. I t is herewith attained that the piece to be forged is adapted to the forms which the grooves (1 have on that point which comes in contact with the same at the end of the stroke. It further is attained by this arrangement that the diameter of the pieces to be forged can be gradually enlarged by moving the bearings during the forgin operation, so that forgingpioces of a conica form can be manufactured and also such ieces the diameter of which alternately en arges and diminishes. The cone shape of the forged piece depends upon the velocity with whlch the bearings m are moved during the forging operation.

It is obvious that with the construction shown and "described, with. more particular reference to Fig. 3, the hollow piece a to be forged (commonly known in the art as a billet) while beingfor ed into a pipe will always during the oscilfatory movement of the dies band 0 be moved by and with the dies in both directions and that through the billet the same endwise reciprocating motion will be transmitted to the mandrel also, and it is still further obvious that as the diameter is reduced it can be fed forward from time to time. Also it is obvious that the pi e so produced will be of the kind known in t e art as seamless.

Having thus fully described the nature of this invention, .what I desire to secure by Letters Patent ofthe United States is- 1. In a forging-press, the combination of oscillating swa es, provided with grooves the diameters of w 'ch increase in one direction,

a fixed frame in which the swa'ges are pivoted,

' a crank-shaft for oscillating the ,swages, a

reci rocation in both directions and a pair of osci latory swagin -dies which" through the billet to be for ef; impart to the mandrel both its forwar and backward movements, each of said swages being provided with a tapering groove, said grooves tapering in the same direction, substantially as set forth.

' 3 In a metal-forgi'n -machine, a pair of oscillatory dies provide each with a tapering groove, said grooves tapering in the same direction, and of a length greater than that of each oscillatory die stroke or movement, andalso provided with means for effecting their synchronous movement in both directions, in combination with suitable means for progressively changing the portions of the grooves which are inoperative relationship with the article to be rolled, substantially as set forth. In testimony whereof I have signed my name to this specification in the presence of 3 5 two subscribing Witnesses.

7 r I OTTO BRIEDE.

Witnesses:

, GUSTAV ELsNER,

WILHELM KRUPPERS.

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