CN1095968A

CN1095968A - Working roll of strip mill

Info

Publication number: CN1095968A
Application number: CN 93111180
Authority: CN
Inventors: 孔庆仕
Original assignee: Continuous Rolling Plant Of Benxi Iron & Steel Corp
Current assignee: Continuous Rolling Plant Of Benxi Iron & Steel Corp
Priority date: 1993-05-31
Filing date: 1993-05-31
Publication date: 1994-12-07

Abstract

The invention discloses a kind of by regulating the operation roll of mill that body of roll convexity is improved plate shape.This roll has a cavity, transmission medium is housed in the inside and roll crown is regulated required pressure controlling device, can utilize setting signal and the on-the-spot main detection signal that influences plate shape, come plate shape is realized closed-loop control that its plate shape control rate is fast, reflection is sensitive and need not change rolling mill structure just applicable to the technological transformation that has strip mill now through electric-control system driving pressure regulation device change roll crown.

Description

Working roll of strip mill

The present invention relates to a kind of operation roll of mill that can improve plate shape.

In the operation of rolling of strip steel, owing to change along parameters such as the axial uneven distributions of the body of roll along elastic flattening value between length of rolled piece direction variations in temperature and roll deformation, wearing and tearing, expansion and operation roll of mill and support roller, force operation roll of mill bus true form and the change of working roll roll gap, thereby make strip material shape of cross section and glacing flatness thereof not meet quality standard.For addressing the above problem, those skilled in the art are except making great efforts to improve the blank original-shape both at home and abroad, improve rolling procedure, rationally adjust in the operation of rolling outside the rolled piece tension distribution, more concentrated is to start with from improving roll shape and stress thereof, change roll crown or amount of deflection, and move axially by roll and to change roll shop building contact stress and roll gap shape and regulate in the production process rolled piece section configuration or reduce rolled piece and depress the horizontal uneven distribution degree of deformation rate and make plate shape improved.Based on this technological guidance, at present general strip steel factory adopts four-high mill more.This milling train can reduce that the amount of deflection of roll improves plate shape when rolling by less working roll and big support roller interphase interaction for duo mill.But this four-high mill makes working roll bear harmful addition bend moment of support roller greater than the working roll of strip steel width and the contact zone of support roller, thereby strengthened the harmful flexural deformation of working roll, the roll-force that also makes intermediate rolling power be slightly larger than both sides because of above-mentioned reason between working roll and rolled piece causes working roll center crush degree to be slightly larger than two ends, strip edge portion attenuate is then caused because of " end just " effect descends the two ends flattening degree of working roll in generation convexity both sides in the middle of making the strip material of producing, thereby makes plate shape be difficult to obtain ideal control.

SUMITOMO CHEMICAL metal industry company development and design went out VC(VarlabLeCrQun in 1974) roll (getting final product variable crown roller) is used for the plate shape control that the strip material is produced.The VC roll is by roller core and roller shell is compound is assembled, the roller shell two ends securely hot charging on roller core, design has hydraulic cavities between roller core and roller shell, hydraulic oil enters the hydraulic cavities from roller core through rotation catcher at a high speed, and it is to play and change the amount of deflection that roll crown produces in rolling with the compensation roll and come control panel shape by regulating the quantitative changeization that dilates that oil pressure orders about roller shell.This VC roll is fast to plate shape control rate, but owing to be that compound assembling is made, the very easily loosening leakage of oil of roller shell weakens the roll lateral stiffness under heavy duty, the on-stream leakage of oil of rotation catcher more is difficult to resolve and determines at a high speed, in addition, VC roller control panel shape ability is lower and involve great expense the 15-20 of general work roller (be doubly), thereby still is difficult to extensive use at present.

Nineteen eighty-two West Germany Shi Luoman-Xi mark machine manufacturing company has proposed a kind of CVC(ContlnQusVarlabLeCravn of being called) design of roll (continuous variable convex roll), it is that upper working rolls and lower working rolls all is ground to identical sigmoid curve shape and 180 ° of roll gap profiles that are installed in formation symmetry on the milling train of mutual dislocation, it is (general that up-down rollers can be moved vertically, the up-down rollers moving direction is opposite), make the roll crown value in its adjusting range, can transfer to realize continuous adjusting continuously by roll shifting to plate shape.Because can carrying out continuity to plate shape in a big way, this scheme regulates control, so apply very fast in recent years.But the CVC roll need be used the high precision numerical control grinding machine when grinding its " S " type curve, this also is difficult to accept concerning the strip steel manufacturer with general technology equipment.

Task of the present invention provides a kind of simple in structure, roll shape and is easy to grinding, plate shape control effect obviously and be applicable to the strip mill working roll of existing modifying rolling mill.

For finishing above-mentioned task, the technical solution used in the present invention is: at one one end sealing other end opening of axle core processing of common plate strip mill working roll and the cavity that leads to the external world, at this cavity place transmission medium is housed, and, after buffer, adapter sleeve, pressure supporter, pressure regulator, fixed cover etc. get up by thread connection by said sequence

Also insert this cavity and be fixedly installed on the roll body, in fixed cover, also be provided with when it rotates the leading screw spline rod that can move forward and backward along the fixed cover internal thread, outer at fixed cover studs with bearing box, spiral-lock has and can spend the automatically controlled drive disk assembly of strong bar and leading screw spline rod to play the supporting frame of support or fixation to leading screw on this bearing box, the rotational lead screw spline rod moves forward and backward it just can change the interior size to the transmission medium extruding force of pressure regulator, make roll body generation strain with the pressure that changes in the roll cavity, produces required convexity and compensate the amount of deflection variation that produces in its production process plate shape is improved.

Above-described pressure buffer, it is made up of cylinder body and plunger body, on this plunger body sealing device is housed, this cylinder body one end sealing, other end opening part also is equipped with the jump ring that this plunger body can be blocked after this plunger body enters cylinder body.

Above-described adapter sleeve, it has a fenestra that can supply transmission medium to come in and go out at least.

Above-described pressure supporter, this also is made up of cylinder body and plunger body, this cylinder body one end is an obturator, on this plunger body sealing device is housed, and this plunger body also has an air-filled pore along its core, and end is equipped with non-return valve in the gas outlet of air-filled pore, at the available sealing bolt of the air inlet end of air-filled pore it is blocked, after plunger body pushed cylinder body, from air-filled pore charges into gases at high pressure in cylinder body after, the gases at high pressure that charge into are enclosed in the cylinder body reliably.

Above-described pressure regulator, by cylinder body, plunger body and push rod are formed, its cylinder body open at both ends, the cylinder body appearance is stepped, has a fenestra that supplies transmission medium to come in and go out at least at its thin footpath end.

The present invention compared with prior art has following advantage:

1,, thereby can reduce in the at present general four-high mill the harmful flexural deformation of working roll and working roll effectively and flatten uneven harmful effect plate shape because the present invention makes roll keep required positive convexity by adjusting pressure in the roll cavity.

2, among the present invention, because of having higher internal pressure, the body of roll make its anti-flat ability enhancing, roll flattening degree reduce (tire principle), so, can prolong roll service life, reduce the roll change number of times and improve strip steel output, can strip steel edge thinning and raw edges waste product be reduced owing to having reduced roll " end just " effect again, the roll flattening degree reduces, and also can suitably reduce roll-force, saves power consumption.

3, owing to the present invention can adjust at random by on-the-spot detection signal and the plate shape feedback signal breaker roll convexity that influences plate shape of electric control gear utilization, so, can in time eliminate because of rolled piece end to end the temperature drop difference change plate shape roll-force is changed cause and worsen, no longer need special roll-bending device, and its plate shape control rate is fast, is quick on the draw.

4, the present invention and VC roll and CVC roll structure compared are simple, grinding convenient, more are applicable on existing four roller strip mills to apply.

Below in conjunction with drawings and Examples the present invention is described in further detail.

Fig. 1 is the roll body longitudinal profile schematic diagram of the embodiment of the invention.

Fig. 2 is primary structure and the general assembly schematic diagram thereof of Fig. 1 embodiment.

Fig. 3 is a buffer assembling schematic diagram among Fig. 2 embodiment.

Fig. 4 is a pressure supporter assembling schematic diagram among Fig. 2 embodiment.

Fig. 5 is the assembling schematic diagram of pressure regulator among Fig. 2 embodiment.

As shown in Figure 1, process a symmetric form Han and pull spherical cavity 2 at the axle core of roll body 1, making it lean on the roll transmission side is obturator, and the other end is garden shape opening one outside roll.

With reference to Fig. 2 and Fig. 3, " plunger body 29 of sealing ring 30 connects the external screw thread of these cylinder body 28 blind ends after pushing and always being about 1/3 place in the cylinder body 28 of buffer 3 again with the internal thread of adapter sleeve 4 studding with twice " O " type.As shown in Figure 4, pressure supporter 6 is made up of cylinder body 37 and plunger body 33, the axle core of this plunger body 33 has an air-filled pore 38, in the outlet side of air-filled pore 38 non-return valve 35 is housed, inlet end at air-filled pore 38 is processed with internal thread, can it be blocked with sealing bolt 31, the outer surface of this plunger body 33 equally also studs with twice " O " RunddichtringO 34.With reference to Fig. 4, after plunger body 33 is pushed cylinder body 37, earlier a poly-polytetrafluoroethylsealed sealed packing ring (32 have the core hole) is put into the outer end of cylinder body 37 inner prop cock bodys 33, then, there is adapter sleeve 4 an externally threaded end to screw in cylinder body 37, till the seal washer 32 of plunger body 33 outer ends is compressed, can pass through the fenestra 5 of adapter sleeve 4 this moment by inflated with nitrogen in the enclosure space of the air-filled pore on the plunger body 33 38 in plunger body 33 the inside cylinder bodies 37, be charged to internal pressure up to 10-40, can stop behind the MPa, inflation one stops, under non-return valve 35 internal mechanism effects, its gland 36 is immediately outlet side 33 sealings of air-filled pore 38, after unloading gas-charging connection, with the sealing bolt 31 that scribbles bonding agent the air inlet of the air-filled pore 38 of plunger body 33 is shut fast.After this, can be as Fig. 2 and shown in Figure 5, the external screw thread of cylinder body 37 blind ends of pressure supporter 6 is connected with the internal thread that pressure regulator cylinder body 39 has fenestra 8 one ends, the internal thread of the external screw thread of pressure regulator cylinder body 39 other ends with fixed cover 11 " b " end connected, then a metal o-ring 9 is set to the step place of cylinder body 39 appearances " a " section back projection as shown in Figure 5.Then, can be having connected buffer 3, adapter sleeve 4, the assembly of pressure supporter 6 and cylinder body 39 and fixed cover 11 makes buffer 3 insert the cavity 2 of roll inwards, during insertion, should be as shown in Figure 5: be coated with bonding agent on 2 sections cylinder bodies of the appearance of cylinder body 39 and on " b " section external screw thread of fixed cover 13, inserting back rotation fixed cover handle 48 makes above-mentioned assembly firmly be assembled together with roll body 1, after so assembling finishes, just roller declination can be placed makes its cavity 2 blind ends downward, in roll cavity 2, inject the emulsion that can be used as transmission medium from fixed cover 11 collar extensions by cylinder body 39 and fenestra 8, make it be full of the space in the pressure regulator cylinder body shown in a line segment 39 among roll cavity 2 and Fig. 5, this with the naked eye can be observed inwards from fixed cover 11 collar extensions.And then can be as shown in Figure 5.One end is equipped with the secondary pressure pilot plunger 42 that metallic gasket 40 and appearance also stud with twice " O " RunddichtringO 41, push rod 43 cylinder body 39 of packing into, secondary pressure pilot plunger 42 inner ends are contacted with the emulsion liquid level, the first class pressure pilot plunger 44 that an end is studded with at least one " O " RunddichtringO 45 also pushes in the pressure regulator cylinder body 39 then, push before and in this cylinder body 39, be crowded with drier oils between the inwall of push rod 43 and cylinder body 39, after pushing, load onto " V " type folder fabric rubber seal 46 and be screwed into cylinder body 39 end cross-peen screws it is fastened with penetrating screw 47 along first class pressure adjustable column cock body 44 cover.With reference to Fig. 2 and Fig. 5, at the C place of fixed cover 11 suit upper bearing (metal) box 13, again an end spiral-lock of supporting frame 17 to bearing box 13.Then, with reference to Fig. 5, one end is equipped with the leading screw spline rod 12 that 10 cores of pressure sensor pressure head have through hole 50, makes dress " pressure head 10 ", and make the outer end of " pressure head 10 " top upper level pressure pilot plunger 44 with the internal thread 49 screw-in fixed covers 11 of an externally threaded end along fixed cover 11.At this moment, the leading screw spline rod 12 that turns clockwise is just changeing it and moves forward along the roller core direction, produce pushing force, by first class pressure pilot plunger 44, push rod 43, secondary pressure pilot plunger 42 part emulsions in the pressure regulator cylinder body 39 are extruded, make emulsion pressure in the roll cavity 2 strengthen the plunger 29 that forces buffer 3 be pressed in its cylinder body 28 fully and the jump ring 27 that is provided with by these cylinder body 28 cylinder mouth places immediately stuck.With reference to Fig. 2 and Fig. 5, make the middle part of leading screw spline rod 12 be supported on the support body of supporting frame 17 through bearing shell 14, and electromagnetic clutch is equipped with from a half-sum of moving winding 15 half of drive coil 16 and the not end that reductor gear wheel 18 is sleeved on leading screw spline rod 12 are installed, but have only the electromagnetic clutch dress spline to be arranged from half of moving winding 15, it can make leading screw spline rod 12 slide before and after it also leading screw spline rod 12 to be rotated, electromagnetic clutch be equipped with from moving winding 15 this half also have stopping means can make its original place rotation and can not before and after slide along leading screw spline rod 12.Electromagnetic clutch drive coil 16 is housed half with reductor large bevel gear 18 for being fixedly connected and being fixed on the supporting frame 17 by reducer shell.Reductor cone pinion 19 connects with motor 21 assemblings through shaft coupling 20.Pressure sensor pressure head 10 detected pressure signal lead-out wires are drawn and are received from the through hole 50 of leading screw spline rod 12 on the electrical control cubicles 23 corresponding signal input terminals, and the power line of motor 21 and control operation line 22 all draw from electrical control cubicles 24.

The purpose of transferring roll crown to carry out the control of plate shape in the present embodiment realizes as follows.

Begin rolling before, can be vertically poor, situations such as the original curved distortion of the operation roll of mill body of roll and thermal expansion, wearing and tearing provide to this roll through electrical control cubicles 23 in advance artificially and set the convexity signal according to blank; In process of production, related factors causes rolled piece glacing flatness or rolled piece shape of cross section to depart from setting or when bad variation takes place, can make the signal of telecommunication that slave plate shape controller obtains respectively and the signal of telecommunication obtained from the horizontal calibrator of finished frame outlet sheet material through feeder line 25 and feeder line 26 input electrical control cubicles 23.Above-mentioned signal becomes the execution signal of adjusting roll crown and goes to control motor 21 forward, reverse or stop commentaries on classics after processing such as identification, amplification, contrast in electrical control cubicles 23.When motor 21 is just changeing as previously mentioned, leading screw spline rod 12 is just changeing and is moving forward, first class pressure pilot plunger 44 in pressure regulator 7, push rod 43, the pressure transmission of secondary pressure pilot plunger 42, make emulsion in the cylinder body 39 be squeezed and be forced to flow out a part and enter roll cavity 2, because this moment, the plunger 29 of buffer 3 was stuck, there is not buffering leeway herein again, the new emulsion that flows into is forced into the plunger 33 that adapter sleeve 4 removes squeeze pressure supporter 6 in the cavity 2, because this plunger body 33 is subjected to by the extrapolability of its high pressure nitrogen that is closed, must produce rebound effect to the emulsion that enters adapter sleeve 4 and make the instantaneous enhancing of cavity 2 internal pressures, its convexity be increased thereby strain takes place the roll body pressurized immediately; During motor 21 counter-rotatings, situation is opposite, owing to move behind the leading screw key lever 12, under cavity 2 inner high voltage emulsion effects, force plunger 42, push rod 43, plunger 44 in the pressure regulator cylinder body 39, follow leading screw spline rod 12 and move after together, the pressure release effect has been played to the high-pressure emulsion in the cavity 2 in the space of vacating in the cylinder body 39, thereby body of roll convexity is reduced.The variation of operation roll of mill body of roll convexity can in time compensate this roller amount of deflection variation thereby can receive the positive effect that improves plate shape.

Claims

1, a kind of strip mill working roll of forming with electric control gear by roll body and roll crown adjusting, it is characterized in that: also be provided with one one end sealing other end opening and lead to extraneous cavity along roll body shaft core, transmission medium also is equipped with at this cavity place, and, buffer, adapter sleeve, the pressure supporter, pressure regulator and fixed cover also insert this cavity by said sequence after by thread connection and are installed on the roll body, in fixed cover, also be provided with when it rotates the leading screw spline rod that can move forward and backward along the fixed cover internal thread, the outer of fixed cover studs with bearing box, goes back the supporting frame that spiral-lock has support of rising the automatically controlled drive disk assembly of leading screw spline rod and leading screw spline rod or fixation on this bearing box.

2, strip mill working roll according to claim 1, it is characterized in that: this buffer is made up of cylinder body and plunger body, sealing device is housed on the plunger body, cylinder body one end of this buffer is an obturator, and the jump ring that this plunger body can be blocked after plunger body enters this cylinder body is housed at its other end opening part.

3, strip mill working roll according to claim 1 is characterized in that: have a fenestra for transmission medium discrepancy on this adapter sleeve at least.

4, strip mill working roll according to claim 1, it is characterized in that: this pressure supporter is made up of cylinder body and plunger body, this cylinder body one end is an obturator, on this plunger body sealing device is housed, and this plunger body also has an air-filled pore along its core, outlet side at air-filled pore is equipped with non-return valve, at the inlet end of air-filled pore one sealing bolt that it can be blocked can be installed.

5, strip mill working roll according to claim 1, it is characterized in that: this pressure regulator is made up of cylinder body and plunger, push rod, its cylinder body open at both ends, the cylinder body appearance is stepped, and end has a fenestra for transmission medium discrepancy at least in thin footpath.