US448612A - green - Google Patents

Description

l J. GREEN. MANUFAGTURE OF DRAW BARS;

3 sheets-sheen 1.

(No Model.)

No. 448,612. Patented Mar. 17 1891.

1 (No Mode1,) 3 Sheets-Sheet 2.

J. GREEN. MANUFACTURE 0F DRAW. BARS.

No. 448,612. ,Patented Mar. 17, 1891.

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(No Model.)

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MANUIEAGCITUM:` 0F DRA-W BARS.

No. 448,612. Patented Mar. .17, 1891.

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JOHN GREEN, OF RENOVO, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO IVILLIAM L. I-IOLMAN AND JOHN MCOORD, BOTH OF SAME PLACE.

MANUFACTURE. OF DllAvl/nBARS SPECIFICATION forming part of Letters Patent No. 448,612, dated March 17, 1891.

Application filed December 8, 1890. Serial No. 378,953. (No model.)

To all whom, t may concern.-

Be it known that I, JOHN GREEN, a citizen of the United States, residing'at Renovo, in the county of Clinton and State of .Pennsylvania, have invented certain new and useful Improvements in the Manufacture of Draw- Bars 5 and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the manufacture of draw-bars, and has especial reference to that class of draw-bars used in connection with the J anney type of car-coupling. This class of draw-bars as heretofore constructed has generally been made of cast or malleable iron or cast-steel, which in practical use become crystallized by the repeated jars incident to automatically coupling and the general wear and tear of service, and as a consequence their durability becomes impaired and they frequently break, especially in cold weather, causing' in many instances irreparable damage or injury to employs.

My invention has for its object an improvement in the manufacture of this class of drawbars7 whereby they can be forged and constitute one homogeneous body of metal which is at no time heated to such a degree aste injure the fiber of the metal. lVith this object in view, I will proceed to describe my invention..

In the accompanying drawings, which form part of this specification, Figure l is a perspective of a blank for a draw-bar with a thickcned head or end 5 Fig. 2, a vertical longitudinal section of a die for forging the thickened head of the blank; Fig. 3, a vertical transverse section of the saine; Fig. Ll, a perspective of the blank with the head forged and lugs formed thereon, Fig. 5, a side elevation of a pair of dies for shaping the head of a drawbar; Fig. G, a vertical transverse section of the saine; Fig. 7, a perspective of a draw-bar on which the forging has been completed. Fig. 8 is an inverted plan of the upper die, and Fig. 9 a plan of the lower die.

Reference being had to the drawings and the letters thereon, A indicates a blank with a thickened head or end c, which is bent up in the usual manner of preparing fagots. In

the adjacent surfaces of the head are formed grooves, in which are placed dowels or rods b of bar-iron to prevent the two parts slipping upon each other and being displaced in forging the head.

B indicates a die having a cavity c therein to receive the body of the blank A and a longitudinal slot c in the upper surface to receive wedges d e for clamping the blank to the die, preventing thev side bars bendinginward and for forming the lower surface of the center portion of the header flange C on the blank as it is being forged out of the thickened end of the blank A. The forging is effected by the use of an ordinary drop -hammer or a hydraulic press, (not shown,) and to flatten the upper surface and make the head or flange C tapering, a flattener D, having a taper corresponding with the taper desired to be given to the head, is interposed between thehead and the hammer,and is moved about upon the head as the forging proceeds. rlhe head is preferably thickened at the end j to provide metal to work into lugs subsequently formed thereon, and a swell or bulge on the rear surface of the head of the draw-bar. After the head O has been drawn out the blank is raised in the die, a suitable punch (not shown) applied, and the link-slot E punched in the head. The blank is then removed from the die, an initial bend given to the head in a suitable former and the lugs g g formed thereon, which may be donei by making the lugs separately and attaching them with dowels and welding,.or sufficient metal may be left on the head to stamp the lugs and form them integral therewith. Preference is however given t0 the former practice. If the latter is used, thelugs may be bent up at the same time the initial bending is done. The rectangular slot 7L and the round hole fr' may be punched into the sides of the bar prior to or after the bending. The blank is now ready for shaping the head.

F indicates the lower shaping-die and is provided with an oblique cavity 7e, in which the body of the blank is placed, a recess or cavity Z for the head of the blank, and a longitudinal slot m to receive the wedges G G, which, as in the die B, clamp the blank to the die while the forging or shaping of the head ICO is being effected, forms a mandrel for the eenter portion ofthe under side ot the head and prevents the sides oi' the body ot' the bar bending inward.

ll indicates the upper die, which is provided with a face for shaping the outer surface of the head, and which is attached to the face of an ordinarysteam-hammerorhydraulie press (not shown) and is provided with a guiding-tongue n, which enters the link-opening E in the head t`,a projection oon one side of the tongue for shaping the inner surface j) of the draw-head, and which corresponds with a depression q in the cavity l for forming the swell orbulge r on the rear side of the draw-head, and two cavities s s on opposite sides of the projection o for shaping the lugs g g on the face ot' the head t?.

The dies are provided with suitable curves for forming tillets.

in the lower die as the upper die rises in the act of forging. Any scale or dirt which may fail into the cavity for the body portion of the draw-bar may be removed through the transverse aperture t in the lower dies. This aperture may also be used for inserting a pointed bar to raise the draw-bar from its seat in the die when the forging has been completed, and the draw-bar may then be raised out of the cavity by the use of a rod.

Having thus fully described my invention, what I claim isl. The methodot manufacturingdraw-bars, which consists in forming a blank with a thiekcned end, upsetting said end and forming a head integral with the body portion, then forming lugs on the face oi' one end of said head, said lugs projecting at a right angle to the face of the head, and then placing the blank in a die and bending and shaping the head with its lugsinto the form substantially as described.

2. rThe method ot' lnaiuil'acturing draw-bars, which consistsiu forming a blank with athickened end, upsetting said end and forming a head thereon, then punching the link-slot in the head, giving an initial bend to said. head, forming lugs on the face of one end of the head, said lugs projecting at a right angle to the face of the head, and then bending and shapingthe head with its lugs in suitable dies into the form substantially as described.

3. The improvement in dies for manufacturing` draw-bars, having a cavity to receive 3y forming the cavity k l oblique in the lower die the upper die is prevented from raising the draw-barfrom its seat laaste the body portion of the draw-bar and a slot crossing the die, and the overlapping wedges for passing through the body portion of the draw-bar and die, substantially as described.

et. Dies for manufacturing draw-bars, consisting of a lower die having a cavity for the body portion of the draw-bar and a curved recess for shapingr the rear surface of the head, in combination with an upper die having a shaping-face for the outer surface of the head and cavities for shaping the lugs thereon, substantially as described.

5. Dies for manufacturing draw-bars, consisting of a lower die provided with an oblique cavity for the body portion ot' the drawbar and a recess for shaping the rear surface of the head, in combination with au upper die having a shaping-face for the outer surface of the head, substantially as described. i G. Dies for manufacturing draw-bars, consisting of a lower die provided with an obi lique cavity for thebodyof the draw-barand i a curved recess for shaping the rear surface l l of the head, in combination with an upper die having` a guiding-tongue to enter the linkslotin the head, a shaping-face for the outer surface of the head, and cavities for shaping t the lugs on said face, substantially as de- I scribed. i 7. Dies for manufacturing draw-bars, consisting of a lower die provided with a recess for the body portion of the draw-bar, a cavity j with a depression therein forshapingthe rear surface of the head and forming a swell or t bulge thereon, in combination with an upper die having a shapiiig-face for the outer surface of the head, a tongue, a projection on i one side of said tongue and cavities on one side of said tongue, and cavities on both sides of the projection for shaping` lugs on the t'ace of the head, substantially as described.

S. A forged blank for draw-bars, consisting t of a body portion and ahead formed integral l therewith and provided with projecting lugs l on one end thereof, substantially as described. i). A forged blank for draw-bars, consisting of a body portion and a tapering head formed integral therewith and provided with projecting lugs on one end thereof, substantially as l described. l In testimony whereof I at'tix my signature in l presence of two witnesses.

JOHN GREEK.

` vitnessesz D. C. RmNonL, i WM. E. DYRF..

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