US581078A - menne - Google Patents

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Publication number
US581078A
US581078A US581078DA US581078A US 581078 A US581078 A US 581078A US 581078D A US581078D A US 581078DA US 581078 A US581078 A US 581078A
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United States
Prior art keywords
pistons
pressure
rolls
rolling
piston
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Expired - Lifetime
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting

Definitions

  • the cylinder without any fracture occurring hi'nasm uch 'as there. can-be no higher pressure in the housing-frames than that corresponding totheheadiof water andflto the areaof f the piston; to trio as to duo mills or rolls, and also-in ease it is desired .to use rolls of small diameter,
  • This device is equally applicable which produce in a single operation a very considerable extension, which rolls must be supported by rolls of a greater diameter. In this case, however, the projections on the bearings must be correspondingly lengthened.
  • This arrangement may be variously applied in practice according to the work to be done.
  • the pressure can be applied to the bearings and then the sheet to be rolled introduced into the rolls in the well-known manner, or the rolls may be opened or separated suiliciently far to allow the fore end of the sheet to be conveniently inserted between the rolls, so as to insure its being correctly lodged, and then only the pressure is turned on, so as to grip and roll the sheet as required.
  • Such a rolling-mill is represented in Fig.
  • the former object viz., the exactly uniform pressure upon the two pistons and exactly uniform yielding of the sameis obtained in the present invention by placing both press-cylinders under water-pressure, which is preferably effected by connecting them with a hydraulic accumulator in which a constant pressure is maintained.
  • a check-valve which, as soon as the rolling-work begins and the press-pistons are thrust back by the rolls, cuts off the communication with the accumulator.
  • Each press-eylind er communicates, by means of a special connecting-pipe, with a third cylinder, and the pistons of these two cylinders are firmly connected with each other and suitably loaded.
  • FIG. 1 is an end view of a pair of rollers and a frame, partly in section.
  • Fig. 2 is a front view, partly in section.
  • Fig.3 is a cross-section through the housingframes;
  • Fig. 4 a cross-section through the hydraulic regulator on an enlarged scale.
  • Fig. 5 is a modification of the latter.
  • Figs. 6 and 7 show the press-pistons which prevent the bad effects of the presence of air in the water.
  • Figs. 8 and 0 show devices for causing the pistons to move uniformly, and
  • Fig. 10 is a partial plan view of the tables shown in Fig. 3.
  • a three working rolls 1) are so jonrnaled as to be capable of aslight vertical movemcntwithin certain limits.
  • the object of this arrangement is that when running idle the rolls may slide against each other and mutually keep themselves round and clean.
  • These working rolls are of exceptionally hard material and of comparatively small diameter. They are mounted in bearings c, which are vertically movable in the frames to the full extent of the working limit of height and have to stand only a slight lateral pressure, but no pressure in the vertical direction. The vertical pressure is transmitted to the supporting-rolls a, which are extremely thick and, as already stated,
  • These cylinders have hydraulic connection by pipes q and q with an accumulator R, and in each of these connectingpipes is fixed a check-valve 'u and c.
  • branch pipes r and 1" connect the pipes q q with the cylinders X and Y, and in each of which fits a cross head or block it and so loaded that the pressure of the accumulator R does not sufiice to lift them, Fig. 4.
  • the cross-head It may also be loaded by a spring .9, which only comes into operation when the pistons x and y have. been raised a certain distance.
  • a set-screw S may limit the stroke of these pistons.
  • the rolling-mill works as follows: The supporting-rolls, or, better, the working-rolls, are set in rotary motion in any convenient manner while a pump forces water into the accumulator R. Therenpon the rolls are set running against each other and the checkvalves 22 c are opened. Bypreviously introducing acaliber-sheet between the working rolls the height has already been determined to which the set-screw S is to be adjusted. If now a thinmetal sheet lying on the table T of the rolling-mill be pushed in between the working rolls 1), these latter part and simultaneously the hydraulic pistons P P are pressed downward.
  • the pistons seek to drive the Waterfrom' the cylinders Q Q back into the accumulator through q q, and con-- sequently close the check-valveso r, so that all communication between the press-cylinders Q Q and the accumulator R ceases.
  • the stroke of the cross-head h, and therefore the maximum distance of the possible separation between the pair of working rolls 1) can be determined by the set-screws S.
  • the rolled sheet metal passes over a grate-shaped guideT'on compulsoryble T and at the very moment that the rolled sheet quits the rolls the pistons 00 y are depressed, so that the pistons P P again press the rolls together, while any Water wasted through deficient packing is at once replaced from the accumulator R, the water in which once more opens the valves 1) c.
  • the metal sheet is then drawn on the table T sufficiently far for its hinder edge to be free of a pivoted grate-shaped leverU, engaging with the grate T. This lever drops into the-position shown in full lines in Fig. 3, so that when the workman moves the sheet forward it is guided between the upper working rolls 1) and rolled out again.
  • the grate-shaped lever U is composed of a series of bars arranged above and alternately with the bars of the guide T.
  • the bars of lever U are pivoted with their heavier ends away from the rolls, so that said heavier ends normally drop in between the bars of the guide T. It will thus be seen that they readily move out of the way of the sheet of metal as it passes through the spring sis replaced by hydraulic pressure.
  • Figs. 6 and 7 show modified forms of the press-cylinders, which prevent the influence of elasticity of water.
  • the two pistons P and P are in separate cylinders Q Q and are rigidly connected by a rod 10.
  • Aleather ring 11 or the like is used for packing the rod connecting the pistons. If the smaller piston is exposed to higher pressure, then the water in the larger cylinder Q is already in a state of strong compression before the piston P moves. This compression reduces the airinelosed in the water to such a small volume that this air can have no influence. As only the excess of pressure of the piston P is noticeable on the rolls, the idle running of rolls when they are not under pressure will not be influenced.
  • the connecting-rod is easy to pack, as the two press-cylinders are pressed against each other.
  • Both the press-pistons P and P may also be arranged in cylinders Q Q in a single casing 12 and be pressed in different directions, as shown in Fig. 7.
  • the two pistons would, however, stand under the same specific pressure, whereby the resistance of the smaller pressure-piston P would be less variable than in the arrangement shown in Fig. 6, but the second arrangement has the advantage of not necessitating any packing of the rod 13, connecting the piston.
  • This nut E is pressed, in the upward movement of the piston, against a bridge C. Thereby the nut E not onlylimits the amount of movement of the piston toward the rolls, but does not interfere at all with its backward movement. It can be easily seen that the continuation has to stand only the excess of pressure on the larger piston and is not affected by the pressure of the rolls. The whole pressure is supported only by the pressurepiston, unlike in the ordinary rolling-mills, with screws, where the screw has to stand the full pressure.
  • the regulation of the movement of the pistons P P may be effected by strongly connecting them with pistons D D, Figs. 8 and 9.
  • the pistons D D have water on both sides, which water is forced out by their movement.
  • the waterspace I which stands over the piston of each cylinder, communicates with the water-space II, which is under the piston of the other cyl inder. If the pistons D D have the same area, then the movement of either piston will produce an increase of pressure on the other piston, which makes the movement of both pistons uniform.
  • a screw may limit, asin Fig. 6, the forward movement of P P.
  • the modification shown in Fig. 9 can be used.
  • the water-space I must then have a smaller diameter in order that the areas of spaces I and II remain equal.
  • the cylinders c and c are secured to each other by a suitable joint g.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Rolls And Other Rotary Bodies (AREA)
US581078D menne Expired - Lifetime US581078A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE91573T

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US581078A true US581078A (en) 1897-04-20

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758466A (en) * 1951-01-11 1956-08-14 Harold H Belcher Squeeze roll
US3024679A (en) * 1957-07-01 1962-03-13 Thomas A Fox Skin pass mills and methods of rolling
US3097549A (en) * 1963-07-16 hudson
US3111047A (en) * 1960-03-14 1963-11-19 Metzger Hans Siegfried Hydraulic adjusting means for rolling mills
US3130628A (en) * 1958-10-06 1964-04-28 Moeller & Neumann Gmbh Arrangement for elongating a stay bolt means or tension anchor independently of nut means associated therewith
US3157073A (en) * 1958-10-31 1964-11-17 Siderurgie Fse Inst Rech Compensated screwdown mechanism for a rolling mill
US3242711A (en) * 1961-06-28 1966-03-29 Fox Ind Inc Rolling mill structures
US3280610A (en) * 1963-09-20 1966-10-25 United States Steel Corp Roll-positioning mechanism
US3355926A (en) * 1963-10-07 1967-12-05 United Eng Foundry Co Pressure control device for a rolling mill

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2929942C3 (de) * 1979-07-24 1982-04-08 Küsters, Eduard, 4150 Krefeld Lagerungsanordnung für eine Walze

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097549A (en) * 1963-07-16 hudson
US2758466A (en) * 1951-01-11 1956-08-14 Harold H Belcher Squeeze roll
US3024679A (en) * 1957-07-01 1962-03-13 Thomas A Fox Skin pass mills and methods of rolling
US3130628A (en) * 1958-10-06 1964-04-28 Moeller & Neumann Gmbh Arrangement for elongating a stay bolt means or tension anchor independently of nut means associated therewith
US3157073A (en) * 1958-10-31 1964-11-17 Siderurgie Fse Inst Rech Compensated screwdown mechanism for a rolling mill
US3111047A (en) * 1960-03-14 1963-11-19 Metzger Hans Siegfried Hydraulic adjusting means for rolling mills
US3242711A (en) * 1961-06-28 1966-03-29 Fox Ind Inc Rolling mill structures
US3280610A (en) * 1963-09-20 1966-10-25 United States Steel Corp Roll-positioning mechanism
US3355926A (en) * 1963-10-07 1967-12-05 United Eng Foundry Co Pressure control device for a rolling mill

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Publication number Publication date
DE94219C (ja)
DE91573C (ja)

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