US1874080A - Controlling mechanism for scale removers and the like - Google Patents

Description

Aug. 30, 1932. F. BRISLIN 1,874,080

cou'rnomme MECHANISM FOR scum nEuovEns AND THE LIKE Filed Aug. 50. 1929 1 v ATTORNEY.

Patented Aug. 30, 1932 UNITED sr- LEO F. BRISLIN, OF ASH'LAND, KENTUCKY, ASSIGNOR TO THE AMERICAN ROLLING MILL COMPANY, OF MIDDLETO'WN, OHIO, A CORPORATION OF OHIO CONTROLLING MECHANISM r03 SCALE REMOVERS AND THE LIKE Application filed August 30, 1929. Serial No. 389,559. I

.My invention is of importance in the con- Ccol of hydraulic scale removers such as are used on rolling mills for removing oxide from sheets, and the specific embodiment of my invention which I shall hereinafter describe has to do with such hydraulic scale removers, it being understood however, that my invention is not restricted .thereto but has other applications equally falling within the scope of my invention. I

It is an object of my invention to provide electrical control means for hydraulic scale removers or other apparatus. in which the work passing through a manufacturing process is made to control the operation of the scale remover or the li ke.v In the production of high finish sheet iron and steel. it is neces-. sary to provide some method of cleaning the oxide or scale from the slab inithe first stages of reduction. It is also desirable to clean slabsas they pass between the-several mills in a continuous rolling process. It has been proposed to effect this cleaning by'impinging upon the surfaces of slabs or the-like, jets of fluid under great pressure. In one rocedure, )i )es havin a line oi )ertorations in them are located on either side of the path of travel of slabs. bars or the likcyaudjets of water. ai for steam are caused to strike the surfaces of the metal pieces being treated as they pass between the pipes.

It is impracticaltomaintain the jets in continuous operation, for which reason means mustbe. provided to turn the jetson and off in accordance with the passing of work through the mills or along a conveyor. lthas. been the practice'to accomplish this by hand. It is an ob ect of my invention to accomplish it automatically.

These and other objects of my invention which will be set forth hereinafter or \villbc apparent to one skilled in the art upon reading this specification, I accomplish by that certain construction ,aod arrangement of parts of \vhich'l shall now dcscribcu preferred embodiment, reference, being had to the drawing which accompanies this specification. 7

In the drawing:

Figures 1 and 2 are side and end elevations through, and the automatic control ofthe spray itself. Particularly. with spra s of fluid under heavy pressure, these pro lems are difficult of solution.

Mechanical autom'atic control and timing mechanisms have not proved successful, and one reason for this is the comparatively greatv power necessary to operate them." To fasten an operating lever upon a valve for example, and to place the'le'ver 1n the pathot movement of slabs,

will. not be successful because the power required to operate the valve is so great that the lever will usually merely serve to stop the slab' and interrupt the rolling process. Again, mechanical control is not susceptible of suthcient variation to give the desired flexibility; and the timing is a difficult matter.

Briefly in 'my invention, I provide for the 1 electrical operation of the valves, the current used supplying all of the power necessary to operate the valves in a positive manner; and I provide means actuated by the passageof work through a desired manufacturing process to control the operation of the valves. It

.will be clear that in this way I solve both problems, since I can arrange a contact device which requires practically no power to operate it, and I can control the timing otthe valve operation at will in a number of ways .which will immediately suggest themselves.

The hydraulic valves which control the supply of fluid to the devices forming the scale removing spray. I arrange to be operated by solenoids, which in turn are actu atcd by an electric circuit made and broken by means acted upon by the work itself. It will be understood that the embodiment of the invention which I shall now describe is illustrative rather than limiting, various modifications in it being within the scope of my invention. r

In Figures 1 and 21 have shown a piece of metal 1, such as a bar or slab, being reduced between rolls 2, journalled in the housings 3 of the ordinary rolling mill. I prefer to fasten my contact making and breaking device to the housings ofthe rolling mill since this is aconvenient support, and to this end I provide a shaft 4 journalled in bearing members 5 fastened to thehousings. The

' contact device may be made adjustable by providing means having ways 6 along which the bearing members may he slid and be his tened as by a bolt 7. On the shaft 4 I provide a lever 8 which extends down intothe path of the sheet 1, and I aflix this lever to the shaft so that, as the lever is moved by the work, the shaft'is made to rotate. fixed on the shaft I provide a lever or crank 9 to operate the contact making and breaking device. i

The latter is shown more in detail in Figure 3 where I have indicated a push button 10 mounted u on a base 11 which is also afiixcd to the mill ousing. An'operating lever 12 1s provided for the push button, hinged to a standard 13. It has a spring 14 tending to pull it toward the'push button and operat- 1ng between the lever itself, where it 1s adjustably held by a thumb screw 15, and the base. An adjustable screw 16 provides the point "of bearing of the lever 12 upon the plunger of the push button 10. A rod 17 connects to the crank 9 and extends through the push button operating lever 12'; and the push utton is so arranged that normally it forms an open circuit but is adapted to close the circuit when the plunger is depressed. The spring 14 tends to draw the operating lever 12 into such a position as todepress the push button and to close the circuit. The rod 17 is provided with an, abutment which may take the form of a nut 18, normally holding the lever 12 out'of push-button depressing position. A pull on the rod will withdraw the nut 18 from the lever 12 which then will depress the push button 10 under the action of the spring 14.

I connect the push button circuit operatively with a circuit controlling the valve-. operating solenoid, and it is preferable to provide for this purpose two circuits, the one operating another through a relay. In Figure 5 the leads 19 come from the supply circuit. They feed directly a circuit 20 in which is inserted the push button 10 and the solenoid 21 of a relay. They also feed directly through fuses 22 or other equivalent protective devices,-a circuit 23 in which the valve operating solenoid 2 1 is in series with the contact forming device 25 of the relay in circuit 20. It will now be understood that .the armature and the valve may take any Also afbend it, particularly if it were of thin gau 'c.

. in said circuit, a solenoid, a connection bewhen the piece of metal 1 strikes the lever 8, the crank 9 through the mechanism hereinabove described will allow the push button 10 to close the circuit 20. The solenoid 21 of the relay in the said circuit will cause the circuit 23 to be closed through thecontact device 25 of the said relay. 3 The solenoid 24 will be actuated and the armature 26 thereof caused to move upward. i The armature 26 is arranged through 7 suitable connections to operate the hydraulic valve 27 which, through pipes 28, controls the supply of fluid to the-jet forming members 29. The operative connection between form found desirable. In Figure 4 I have shown'the armature connected by a reciprocating rod 30 and a sliding connection indicated generally at31, with the valve operating handle 32. The solenoid, valve and connections are mounted upon a convenient support as shown. The timing of the niech- 1 anism may be regulated as found advisable in a number of wa s, one ofwhich will of course be the lOCltlOItOf the contact oper ating lever 8 with reference to the location of the sprays. v It will be clear that-I have provided a positive mechanism for the operation of a hydraulic scale remover. "Since it takesC a out a 250 pound pull to operate a 500 pound hydraulic pressure valve, it will be 2 clear why attempts at the mechanical opera- Y tion of the valves have proved unsuccessful. The resistance offered by the pull necessary" to operate the valves would stop a slab or bar which was merely being carried along a conveyor; or if the bar or slab were'positwelyfed as by the rolls2, it would mar or 7103 I 'havehowever solved this problem. suitable'electrical actuation of the valves, 1 secure sufficient power to operate them quick- 'ly,-while the resistance of my contact device to the movement of metal pieces to bet-reafr'efl is practically negligible.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

In an hydraulic scaling mechanism, means for feeding a work piece forward, fluid con ductors arranged transversely of the path of travel of said work piece and having opposed orifices, a valve controlling the admission of high pressure fluid to said conductors, a trigger lying normally in the path of movement of said work piece, an electric circuit, controlling means for said electric circuit operatively connected with said trigger, a relay tween said relay and said solenoid,and an operative connection between said solenoid and said valve. I

LEO F. BRISLIN, 6

Images