US378612A - Self and william h - Google Patents

Description

(No Model.)

R. NAYSMITH.

BLOOM MANIPULATOR FOR ROLLING MILLS. No. 378,612. Patented Feb. 28, 1888.

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PATENT ROBERT NAYSMITH, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO HIM- SELF AND WILLIAM H. ROBERTS, OF SAME PLACE.

BLQOIVi IViANiPULATOR FOR ROLLl NG iVllLLS.

SPECIFICATION forming part of Letters Patent No. 378,612, dated February 28, 1858. Application filed October 10, 1887. Serial No. 251,892. (No model.)

To aZZ whom, it may concern.-

Be it known that l, ROBERT NAYSMITH, of Pittsburg,in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Manipulators for Rolling-Mills, of which the followingisaspecification.

My invention is intended more particularly for what are known as blooming-tables; but it may be used in connection with main rollsand table-rolls correspondingly operated for other purposes and having other names. lVhatI term table-rolls are the well-known series of rolls laid side by side horizontally a little distance apart, and operated by turning in one direction or the other, and raising and lowering to properly receive the metal from a three-high train of rolls, and to properly enter the metal into the train again after it has traversed in the opposite direction. Such manipulators have been longknown and are much approved. The entire series of rolls constituting the manipulator proper and the framing which supports them, the gearing and reversible engine or other motor which drives them alternately in opposite directions at the will of the operator, and the hydraulic presses or other means which raise and lower them to deliver the metal into the bite of the rolls to traverse in one direction or the other-all these may be of the ordinary construction. They form no part of my invention.

My improvement relates to the devices used in connection therewith for turning the hot metal as it lies on the table-rolls and for moving it bodily to the right or the left thereon to present it to the proper grooves of the main rolls.

I employ, as has long been used, a series of vertically-moved'rams, which rise and sink in the considerable spaces between the tablerolls, and which, by being raised under one edge of the mass of iron or steel, partially turn it, as required. These rams are carried in a carriage which is traversed strongly to the right or left, and by pressing against the side of the hot mass move it in either direction, as required. Such are commonly used; but as heretofore worked by hydraulic presses their motion has been slow. I have discovered that a proper combination of mechanism,driven by tions on a larger scale.

belting or gearing from the main engine of the mill, can operate reliably, with proper force, and be perfectly controlled. My invention possesses the important advantage over that commonly employed, that the motion, especially the return motion, may be very rapid.

The following is a'description of what I consider the best means of carrying out the invention.

The accompanying drawings form a part of this specification.

Figure l is a plan view. Fig. 2 is a vertical section on the line 00 m in Fig. 1. Fig. 3 is a vertical section at right angles to that of Fig. 2. Figs. 4 and 5 represent certain por- Fig. alis an elevation corresponding to Fig. 2. Fig. 5 is an elevation at right angles to Fig. 4, partly in section.

Similar letters of reference indicate corresponding parts in all the figures where they occur.

A B 0 represent, respectively, the three rolls of a three-high train of a blooming-mill. They are mounted in strong housings (not represented) and are powerfully rotated by gearing (not represented) in the directions indicated by the arrows.

D D, 850., are the rolls of thetable, mounted in a frame, E, which, it will be understood, is equipped with devices (not shown) for raising and lowering to present the iron properly to the main rolls to be traversed in one direction or the other.

M is a bloom which is being manipulated thereon.

U is a carriage which is capable of being moved transversely across from right to left, or from left to right, to any required extent, being supported on wheels U, which run on ways T. This carriage guides a series of vertically-moving rams, S, each of which is operated by a connecting-rod, It, which connects it with a pin, Q, set inawormqvhcel, Qwhich receives motion from a worm, P,fixed on a longitudinal shaft, P, which receives a quick rotatory motion. The several worm gear-wheels Q Q are mounted on short shafts L, which are supported in substantial bearings carried on stout arms L, extending downward from the carriage U.

The shaft P receives its motion from a bevel gear-wheel, P from a bevel gear-wheel, N which is fixed on a sleeve, N, which is revolved by a transverse shaft, N, which is connected by a friction-clutch, O, to a pulley, turned by a belt from a counter-shaft. (Not repre sented.) The sleeve N is mounted on the shaft N by the aid of the feather n, so that it is compelled to rotate with the shaft, but is free to be movedlongitudinall y thereon. There are collars a a on the sleeve N,which receive the end of the shaft P between them, so that as the carriage U is traversed to the right or left the sleeve N travels with it, and the bevelwheels N P are kept properly engaged.

K K are endless chains fastened to the carriage U, and running over pulleys J mounted on a shaft, J. The chains run also over the idle-pulleys J carried on an idle-shaft, J mounted on the other side of the table, as shown. This shaft J is turned by the aid of a bevel gear-wheel, J, engaging with a bevel gear-wheel, l, on a shaft, I, which latter receives motion in one direction or the other from a clutch, G, engaging it at will, alternately, with one or the other of the pulleys H" H which are turned in opposite directions, the one by an open belt and the other by a cross-belt from a main shafting. (Not shown.)

It will be understood that instead of the positive clutch G a friction-clutch or apair of friction-clutches may be employed adapted to engage more gently and to allow the motion to be slow or quick, according as it is fully engaged or only partially engaged with one or the other of the pulleys H H I have for simplicity shown a positive clutch, G, operated by a single lever, G.

The invention can be operated by the same attendant who controls, by the ordinary handlever or other suitable means, the mechanism of the blooming-table. I have consideredit necessary here only to describe what is done to operate the carriage U and the rams S, which are carried thereon.

In operating, the attendant, who will, as already suggested, usually be the same who controls the table-rolls D, may set the clutch 0 into firm engagement with the pulley O, and thus operate the rams S up and down rapidly, strongly, and steadily. Then, holding the lever G, controlling the clutch G, be engages the latter with one or the other of the pulleys H H and by the train of mechanism represented so operates the chains K K as to move the carriage U to the right or to the left. If he wishes to turn the hot iron or steel M, he brings the carriage U into such position while the rams S are down that on their next rise they will be presented under one corner of the hot mass, and will, by lifting that side, give it a quarter-revolution. If he wants to turn it farther over, he, during the next depression of the rams U, moves the carriage again under, so that on their next elevation they again lift one side and turn the mass again a quarterrevolution. If he wants to move the hot mass to one side or the other, he moves the carriage U to the proper side during the period while the rams are depressed, and so soon as the rams S have risen sufficiently to present themselves above the upper surface of the table-rolls he engages the clutch G with the pulley H and communicates motion through the chains K.

K, which moves the carriage U sidewise, presenting the rams S sidewise against the side of the hot mass, forcibly moving it to the required extent. Practice may allow the operator to attain great facility of manipulation in this manner without arresting or changing in an y manner the regular vertical reciprocation of the rams S, but if for anyreason it is desired to arrest the vertical motion of the rams S, leaving them down for a period while the carriage is moved leisurely across under the hot mass, or leaving them up for a period while the carriage is moved leisurely across to move the hot mass, the attendant, by taking hold of the lever 0 and disengaging the clutch O entirely or partially from the pulley O, can allow the motion of the rams S to be slowed or to be stopped altogether, and the motion of the lever 0 in the opposite direction re-engages the clutch O, and the motion of the rams is again quickened. All the motions are strong and all may be rapid. It is not easy with the mechanism heretofore used to obtain a quick return movement of the several parts. Hydraulic presses work strongly outward, and they can be proportioned to work also with any desired velocity outward but it is not easy to overcome the considerable resistance involved in the return motion and to produce such movementsrapidly by hydraulic presses. The employment of two sets of such presses would obviously greatly complicate the apparatus.

My mechanism is strong and simple and not liable to derangement. The worms P on the shaft 1? run rapidly, -so that a light train of mechanism may communicate motion down to that point. Each worm-wheel Q and its connections to its corresponding ram may have any strength desired and will work certainly in unison with the other parts. L support the strain applied through the wheels Q very directly. The end-thrust on the shaft P is taken by dollars on the shaft, which act against bearings provided on the carriage U and on an arm, U extending down in the middle of the carriage. The shaft is supported close to the bevel-gear P by an arm, U

Modifications may be made without departing from the principle or sacrificing the advantages of the invention. I can make the carriage U longer, so as to carry a greater number of the rams S, with their operating gearing; but my experiments indicate that the length shown will be sufficient.

Instead of the chains K K, I can use other means for communicating positive motion to the carriage from the reversing-belts-wuch as racks and pinions.

I can use two pulleys in place of the single IOO IIO

The brackets pulley O and two clutches oradouble clutch in place of the single clutch 0 represented, so as to communicate motion in opposite directions to the worm-wheels Q; but it is not necessary. It makes no material difference to the motion of the rams S whether they are operated by the turning of the crank-pin Q in one direction or the other. Turning them in either direction reciprocates the rams strongly and at the proper rate. In view of this fact I propose in some cases to reverse the motion of the alternate wheels Q, providing for one a right-hand worm and providing for the next aleft-hand worm, making the several wheels Q correspondingly matched with regard to the angular position of their teeth. I mean that instead of making all the worms P left-handed,as shown,and providing all the worm-wheels Q with corresponding teeth I will make half the worms P as here shown and the other half right-handed worms, providing corresponding worm-wheels therefor. l/Vith such modification the alter nate crank-pins Q will revolve in opposite directions, and the motion of the rams as they appear above the surface of the table will not be in any degree changed. Such modification may be of advantage in some cases Where the device isseverel y worked by lessening the endthrust on the shaft 1?, the reverse arrangement of the worms causing the end-thrust of one to counterbalance the end-thrust of its neighbor, leaving the final end-thrust to be received on the bearings only such portion of the thrust as remains unbalanced between the several worms It will be understood that my invention may be applied to a table which is on one side only of the rolls, in such cases usually on that side only where the metal is to be raised; or it can be applied toa blooming-table or analogous series of 1'olls,D,on each side of the threehigh trains A B 0.

Although I have described the invention as applied only to three-high rolls, it will be understood that it may be used also wit-l1 twohigh rolls.

I claim as my invention 1. In a bloom-manipulator, the shaft N, feather n thereon and means for rotating said shaft, in combination with the sleeve N, interiorly recessed to receive said feather and having the end collars, n a the bevel gearwheel N connected to said sleeve, the shaft 1? and the bevel gear-wheel I? thereon,engaging said bevel gear-wheel N", the end of said shaft P engaging between said collars, as and for the purpose specified.

2. In abloom-manipulator, the series of rams S, connectingrods R, and worm-wheels Q,.with their crankpins Q, all mounted on the carriage U and driven simultaneously by worms I on the single shaft P, as herein specified.

3. In a bloom-manipulator, the carriage U, chain K,reversible shaft J, with its pulleys H H", and an idle-shaft, J, with its pulleys J in combination with the vertical1y-reciprocating rams S, carried on said carriage,and with the table-rolls 1), frame E, and main rolls A B 0, arranged for joint operation, as herein specified.

4. Ina bloom-manipulator, the transverse shaft N, feather a, sleeve N, and bevel gearwheel N in combination with each other and with the bevel gear-wheel P and the positive mechanical connections of the latter to the rams S, all arranged for joint operation, as herein specified.

5. The combination, with the main rolls A B O, of the reversible rolls D, carried in a frame, E, which may be raised and lowered, and of the manipulator-rams S, operated by cranks carried in the carriage U, and of the chains K and their reversi bleoperating-wheels J, all arranged for joint operation, substantially as herein specified.

In testimony whereof I have hereunto set my hand, at Pittsburg, Allegheny county, this 27th day of September, 1887, in the presence of two subscribing witnesses.

ROBERT NAYSMITH. WVitnesses:

H. E. HOLMES, J AS. G. MUSTIN.

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