US298748A - Method of manufacturing eye-bars - Google Patents

Description

(No Model.)

W. HAINSWORTH METHOD OFM ANUPAUTURING BARS. No. 298,748. Patented May 20, 1884,.

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WVILLIAM HAINSWVORTH, OF PITTSBURG, PENNSYLVANIA.

METHOD OF MANUFACTURING EYE-BARS.

SPECIFICATION forming part of Letters Patent No. 298,748, dated May 20, 1884.

Application filed December 3, 1883. (No model.)

To Ml whom, it may concern Beit known that I, WILLIAM HAINSWORTH, a citizen of the United States, residing at Pittsburg, county of Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvement in Methods of Manufacturing Eye-Bars; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which-like letters indicating like parts Figure 1 is'a perspective view of aplant used in manufacturing eye-bars. Fig. 2 is a side elevation of a pair of rolls, the housing being shown in section. Fig. 3is a side view of a finished eye-bar blank. Fig. at is a side view of bar wherein the notches are formed by setting down the edges.

My invention relates to a new and improved method of manufacturing eye-bars and other like articles which have enlarged ends and a reduced body portion.

Heretofore such bars have been produced by rolling the bars to the size in cross-section which the enlarged ends of the finished article is to have. The reduction of the ends is stopped at this point, but the body portion is still further reduced on two of its sides by further rolling. In this rolling operation it is necessary that the rotation of the rolls should be stopped instantaneously near each end of the bars, so as not to reduce the end portions. The rolls are then, while not in motion, forced nearer to each other and into that portion of the bar between them. They are then started in a reverse direction, and when the opposite enlarged end is reached theyare again instantly stopped and again adjusted toward each other. This method of forming eye-bars is objectionable, as the sudden stopping and the forcible adjusting of the rolls together subjects the rolling'mill to dangerous shocks and strains; and it is obj ectionable for the further reason that the motion of the rolls is not always stopped at the proper point, and consequently the enlarged end will be reduced in size.

The object of my invention is to so manufacture these bars that the mill will not be subjected to sudden shocks and strains, as above stated, and that there will be no danger of redu cin g the ends if the rotationof the rolls should not be stopped when the enlarged ends are reached; and, in general terms, my invention consists in the method hereinafter described and claimed.

Bythe ordinary forging or rolling operation I bring a bar to the size in cross-section de sired for the enlarged ends. Near the ends of the bar I form notches a and a in the edge thereof, either by setting down the metal bya steam-hammer, B, having suitable anvil and hammer-head, or by cutting out a piece of the metal on each edge. This setting'down or re moval of the metal near the ends should be such as to reduce the bars at these points to approximately the size in cross-section which the body portion of the finished bar is to have. The bar thus prepared is taken to a pair of rolls, 0, providedwith aplain portion, 0, and a groove, 0, which has a width approximately equal to the thickness of the bar, and is placed edgewise into the groove 0, the notches a in its edges at one end being in line with the bite of the rolls. The rolls having been adjusted so as to produce the desired amount of reduction,are then started in the proper direction to roll the body portion. As is usual, the bar will be drawn into the rolls and reduced and elongated until the notches a at the opposite end of the bar are reached. At this point the feed of the bar will stop, as the portion of the bar between the notches a is smaller than the other portion just rolled, and consequently the rolls will no longer bite the bar. The rolls are then stopped and adjusted for the next pass, and are then started in areverse direction,when the abovedescribed operation will be repeated. This rolling is continued until the portion of the bar between the notches has been reduced to the desired size in cross-section, which is the same as that of the portion between the notches. It may happen that either the setting down by the hammer or the action of the rolls may thicken the bar somewhat. In that case the bar is taken from thehammer or from between the rolls, which are separated for that purpose, and then passed with its flat side up between the plain portion 0 of the rolls, so as to reduce it to the proper thickness.

It will be understood that the rolls are to be provided with the usual reversing mechanism.

I have shown the journal-boxes of the upper roll supported by a weighted lever, d, and through the housing passes the screw 6, for depressing said roll; but I may employ any equivalent suitable device known in the art for effecting this adjustment.

I do not desire to be understood as limiting myself to working bars rectangular in crossseotion, as round bars may be worked'in the same manner with equal facility by the use of setting-down dies properly shaped.

' In so far as relates to the shape of the rolls, I do not desire to confine myself to the shape shown, as the reducing of the body portion of the bar may be effected in any suitably-shaped rolls.

What I claim as my invention ismediate between but away from the ends is o reduced by successive passes back and forth I between rolls, the rolls being reversed while WILLIAM HAINSVORTH.

WVitnesses:

DARWIN S. WOLOOTT, R. H.WHITILESEY.

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