CN1303323A - Method of winding strips - Google Patents

Abstract

A method of winding strips wherein in order to prevent a preceding strip from lingering at the outlet side of winding pinch rolls and prevent the front end of a following material from lingering at the inlet side of the winding pinch rolls, a strip fed out of a rolling mill is cut to a predetermined length by strip shears (102) and the cut strip is wound on the mandrel (107) of a winding device (104) via winding pinch rolls (105) disposed at the outlet side of the strip shears (102), the peripheral speed of the winding pinch rolls (105) after the tailing end of the strip to be wound on the mandrel (107) via the winding pinch rolls (105) has been cut by the strip shears (102) being higher than the speed at which the following material is transferred immediately after the cutting and lower than the winding speed at which the strip is wound on the mandrel (107).

Description

The method for coiling of band steel

Technical field

The present invention relates to band steel that hot-rolling mill is sent and cut into specific length, by being configured in the strip coiling method that band steel that batching of band steel cutter outlet side will cut off with pinch roll batches with the reel of devices for taking-up with band steel cutter.

Background technology

Figure 16 represents total skeleton diagram of general Continuous Heat rolling line.In the past, cut into the band steel of specific length by being with the steel cutter, the switching of devices for taking-up is carried out as following when alternately batching with go ahead of the rest material devices for taking-up and back row material devices for taking-up.For example, if situation about switching on the row material devices for taking-up b of back from material devices for taking-up a is in advance described, then the band steel d that sends from finishing mill c cuts into specific length with the band steel cutter e that is configured in finishing mill c downstream and is divided into and is with steel d in advance ₁And back row band steel d ₂, be with steel d in advance ₁With back row band steel d ₂Respectively with material devices for taking-up a and back row material devices for taking-up b batch in advance.

With material devices for taking-up a in advance to be with steel d in advance ₁During batching, make the side shifting upstream of batching that is configured in band steel cutter e outlet side with the bottom pinch roll g of pinch roll f, like this, the deviation angle of batching with pinch roll f is changed, the throughput direction of band steel is switched to back row material devices for taking-up b from the material devices for taking-up a that goes ahead of the rest in advance, be with steel d in advance ₁Leave and batch with immediately the back row being with steel d behind the pinch roll f ₂Be directed to back row material devices for taking-up b, go material devices for taking-up b to this back row band steel d with the back ₂Batch.At this moment, triangle door (gate) j prevents back row band steel d ₂Pass material devices for taking-up a one side in advance.

In recent years, the taking-up equipment of continuously hot rolling adopts carrousel formula (carrousel) taking-up equipment.

Figure 20 schematically shows an example of the Continuous Heat rolling line that disposes carrousel formula taking-up equipment.

Carrousel formula taking-up equipment is provided with the 1st and the 2nd reel, the the 1st and the 2nd reel 1,2 is separated in a circumferential direction mutually and rotatably is being provided with on swing-around trajectory 3, so that be positioned at when batching on the starting position at a reel, another reel is positioned at and batches the ultimate position.For example, the 1st reel 1 is positioned at when batching on the starting position, is with steel S with what 1 pair of finishing mill 4 of the 1st reel was sent in advance ₁After having batched ormal weight, one side is batched this and is with steel S in advance ₁, one side rotates to the 1st reel 1 and batches the ultimate position, cuts off with band steel cutter 5 in this state and is with steel S in advance ₁Tail end, with being positioned at row band steel S behind 2 pairs on the 2nd reel that batches the starting position ₂Front end batch.In addition, at the band steel S that batches on the ultimate position ₁Batch finish after, batch finish be with steel S in advance ₁The roll coil of strip extract out from reel 1, reel 1 becomes holding state, up to back row band steel S ₂Till the band steel front end of back batches.

At upstream side roll line P towards the reel that batches the starting position (being the 1st reel 1 among the figure) ₁About, be provided with upstream side and wear band guide plate 6～13, be used for the reel of front end guiding upstream side that will band steel S, from upstream side roll line P ₁Along separate routes and towards the downstream roll line P that batches ultimate position (being the 2nd reel 2 among the figure) ₂About, be provided with the downstream and wear band guide plate 13～15 and guide roller 20, be used for the band steel S that is twisted on the reel that batches the ultimate position is led.Wear band guide plate 13 and be configured in downstream roll line P ₂From upstream side roll line P ₁On the position along separate routes, with at upstream side roll line P ₁On upper guide plate and at downstream roll line P ₂On bottom guide.

Among Figure 20, symbol 16 is at roll line P ₁On be located at pinch roll between finishing mill 4 and the strip cutter 5, the 17th, at roll line P ₁On be located at batching of band steel cutter 5 outlet sides and use pinch roll, the 18th, the upstream side wrapper roll, it is configured to movably form, can be toward or away from the outer peripheral face side of batching the starting position reel, the 19th, the downstream wrapper roll, it is configured to movably form, can be toward or away from the outer peripheral face side of batching the ultimate position reel, when 1st, the 2nd reel 1,2 rotated on swing-around trajectory 3, the upper guide plate 14 that the band guide plate is worn in each wrapper roll 18,19 in upstream side, downstream and downstream moved and leaves the swing-around trajectory 3 that allows to carry out this rotation.

But, existing strip coiling method on the above-mentioned general hot rolling line easily produces following problems, when promptly cutting off the band steel with band steel cutter e, originally by finishing mill c and in advance the material devices for taking-up a tension force that imposes on the band steel cancelled, with the tail end of steel as shown in figure 17, produce heap steel phenomenon at the outlet side that is batching with pinch roll f in advance, the worst situation is to hang on the triangle door with the tail end of steel in advance and make the steel plate breakage, in addition, also produce following problems, promptly be with steel S in advance ₁Tail end leave and batch with behind the pinch roll f, this batches peripheral speed with pinch roll f for the moment than back row band steel S ₂Transporting velocity slow, the front end of back row band steel S2 produces heap steel phenomenon at the entrance side that is batching with pinch roll f.

On the hot rolling line that is provided with carrousel formula taking-up equipment, existing strip coiling method also produces following problems: be with steel S batching with the reel (the 2nd reel 2) that batches the ultimate position in advance ₁When using band steel cutter 5 to cut off the band steel in the process, originally the tension force that applies by finishing mill 4 and downstream reel has unclamped, and as shown in figure 21, is with steel S in advance ₁Produce heap steel phenomenon at the outlet side that batches with pinch roll 17 that is disposed at band steel cutter outlet side, the worst situation is to be with steel S in advance ₁Hang over and be positioned at upstream side roll line P ₁With downstream roll line P ₂The locational downstream of shunt guide plate 13 front ends, make the steel plate breakage, but also produce following problems, promptly be with steel S in advance ₁Tail end leave and batch with after the pinch roll 17, this batches peripheral speed with pinch roll 17 for the moment than back row band steel S ₂Transporting velocity slow, back row band steel S ₂Front end produce heap steel phenomenon batching with the entrance side of pinch roll 17.

The present invention is developed in order to solve above-mentioned bad phenomenon, its purpose is to provide a kind of strip coiling method, this method is after cutting off the tail end of the band steel that is batched by reel with band steel cutter, can prevent that this band steel from producing heap steel phenomenon at the outlet side that batches with pinch roll that is disposed at band steel cutter outlet side, and can prevent that the front end of back row band steel from producing heap steel phenomenon at the above-mentioned entrance side that batches with pinch roll.

Disclosure of an invention

In order to achieve the above object, strip coiling method of the present invention cuts into specific length for the band steel that finishing mill is sent with band steel cutter, by being configured in the strip coiling method of batching with the reel of devices for taking-up of batching of above-mentioned band steel cutter outlet side with pinch roll, the band steel that will cut off

It is characterized in that, batch behind the tail end of the band steel on the above-mentioned reel by above-mentioned batching with above-mentioned band steel cutter cut-out with pinch roll, make above-mentioned batch with the peripheral speed of pinch roll faster than the transporting velocity of just carrying out the back capable material after the above-mentioned cut-out, and slower than the coiling speed of batching above-mentioned band steel with above-mentioned reel.

In the present invention, because the band steel after cutting off acts on the pulling force that has towards the downstream at band steel cutter and between batching with pinch roll, between batching, also act on the pulling force that has towards the downstream with pinch roll and reel, so can prevent to produce heap steel phenomenon with steel at the outlet side that batches with pinch roll in advance, but also, pile the steel phenomenon in the entrance side generation of batching with pinch roll so can prevent the front end of back row material owing to make and batch with the peripheral speed of pinch roll sooner than the transporting velocity of just carrying out the back capable material after the above-mentioned cut-out.

In this case, above-mentioned reel is the reel of carrousel formula taking-up equipment, batches after the tail end of the band steel on this reel cuts off with above-mentioned band steel cutter the setting coiling speed V of above-mentioned reel by above-mentioned batching with pinch roll _m, and the above-mentioned target velocity V that batches with pinch roll when carrying out this cut-out _pAnd the plate speed V of the back capable material after the above-mentioned cut-out _sRelation be set at V _m＞V _p＞V _s, just can prevent from advance to hang over the front end of wearing the band guide plate with steel, this is worn the band guide plate and is positioned at towards the roll line of the reel that batches the starting position with on the shunt position of the roll line of the reel that batches the ultimate position.

In addition, batch and use pinch roll by being configured in the 1st of band steel cutter outlet side at the band steel that cuts into specific length with band steel cutter, in the method for coiling that alternately batches by the reel of the reel of upstream side devices for taking-up and downstream devices for taking-up,

Batch with pinch roll and to be batched after the tail end of the band steel on this downstream reel cuts off with above-mentioned band steel cutter by being configured in the 2nd of downstream reel entrance side, the above-mentioned the 2nd batches the target velocity V of usefulness pinch roll _P1, the above-mentioned the 1st target velocity V that batches with pinch roll _P2, the Target Board speed Vs of the back capable material after the above-mentioned firm cut-out and above-mentioned downstream reel the relation of setting coiling speed Vm be set at Vm＞V _P1＞V _P2＞Vs just can prevent from advance to make this band steel breakage with the tail end of steel on the triangle door because of hanging over.

In this case, after the above-mentioned the 1st bottom pinch roll skew of batching with pinch roll, batch with pinch roll during till the tail end of the band steel on the reel of above-mentioned downstream until cutting off with above-mentioned band steel cutter to batch by the above-mentioned the 2nd, under the speed that makes above-mentioned the 1st bottom pinch roll situation slower than the Target Board speed Vs of above-mentioned back row material, with the above-mentioned the 1st top pinch roll pushing band steel that batches with pinch roll, torque actual value until above-mentioned the 1st bottom pinch roll reaches predetermined setting value, if pushing force at this moment is that above-mentioned top pinch roll when carrying out above-mentioned skew is to the setting pushing force of this band steel, like this, just, the available the 1st batches the tail end that twists in the band steel on the reel of downstream with pinch roll clamping well.

In addition, before the band steel that cuts off with above-mentioned band steel cutter batches with pinch roll, by above-mentioned reel continuously by the above-mentioned coiling machine that is configured in this band steel cutter outlet side, this pressure that batches with pinch roll is set at the value greater than P, this P value P=2F (Δ u/ Δ x)+4 (M _B/ Δ X) { (R _a/ R _L)+(l _b/ R _U) come to determine that like this, can set the pressure of top pinch roll for only value, the tail end that therefore can prevent the strip steel breaks or thick band steel produces when being imported into devices for taking-up and imports bad phenomenon etc.

In this case, set above-mentioned pushing force after, from before row band steel in back is nipped, keep the above-mentioned roll gap that batches with pinch roll with the steel whipping in advance, like this, can prevent the back row band steel generation phenomenon such as bad of nipping of being nipped when batching with pinch roll.

Before batching band with above-mentioned reel steel finish, to be converted to rotating speed control from torque control by the strip coiling control that this reel carries out, then hold-down roller is pressed on the band steel that is rolled into web-like, make above-mentioned reel stop revolution, having eliminated the roll coil of strip that the contact because of hold-down roller causes slows down, the result, can avoid the outer volume loose winding of the roll coil of strip or be turriform and so on batching bad generation, and, after strip coiling finishes, when the revolution of the roll coil of strip is stopped, because this hold-down roller has brake force, so can make the roll coil of strip stop to turn round at short notice.

Before batching band with above-mentioned reel steel finish, carry out the band steel torque control of this reel, to improve the tension force of band steel, afterwards hold-down roller is pressed on the band steel that is rolled into web-like, make above-mentioned reel stop revolution, eliminated the roll coil of strip that the contact because of hold-down roller causes and slowed down, avoided the outer volume loose winding of the roll coil of strip or be turriform and so on batching bad generation.And, after strip coiling finishes, when the revolution of the roll coil of strip is stopped, because this hold-down roller has brake force, so can make the roll coil of strip stop to turn round at short notice.

In addition, for the front end of above-mentioned back row material after cutting off the band steel with above-mentioned band steel cutter be configured in this band steel cutter outlet side above-mentioned that nip batched when using pinch roll, this batches with the peripheral speed of pinch roll faster than the transporting velocity of above-mentioned back row material, by batching with the torque limit of setting deceleration side on the drive unit of pinch roll above-mentioned, just can be thicker at thickness of slab, under the situation of band steel that flexural rigidity is big, prevent that back row material from producing heap steel phenomenon at the entrance side that is batching with pinch roll.

The simple declaration of accompanying drawing

Fig. 1 is the key diagram that is used to illustrate the strip coiling method of the embodiment of the invention 1.

Fig. 2 is the key diagram of one of the operation mode (velocity mode) of explanation each several part when cutting off, batching band steel example.

Fig. 3 be explanation when the band steel cuts off, play after the cut-out in advance with the key diagram of the state of steel and back row band steel.

Fig. 4 is the key diagram that is used to illustrate the strip coiling method of the embodiment of the invention 2.

Fig. 5 is the figure that is used to illustrate the strip coiling method of the embodiment of the invention 3, is the summary axonometric drawing with the driving mechanism of pinch roll of batching of band steel cutter outlet side.

Fig. 6 is illustrated in the batching with the speed of gyration of pinch roll and the figure of load torque time to time change of band steel cutter outlet side under the situation of the torque limit of having set deceleration side.

Fig. 7 is illustrated in the batching with the speed of gyration of pinch roll and the figure of load torque time to time change of band steel cutter outlet side under the situation of the torque limit of not setting deceleration side.

Fig. 8 is the figure that is used to illustrate the embodiment of the invention 4, is the figure that the mechanical model of the roll coil of strip is batched in expression;

Fig. 9 is the chart that is illustrated in the measurement result of the speed of batching end of a period stage reel and torque.

Figure 10 is the chart that is illustrated in the measurement result of the speed of batching end of a period stage reel and torque.

Figure 11 is the figure that is used to illustrate the embodiment of the invention 5, is the chart of the relation of the pressure of expression band steel when batching top pinch roll with pinch roll and the amount of being pressed into.

Figure 12 batches the top pinch roll of usefulness pinch roll to the pressure of band steel and the time chart of hydraulic cylinder oiling instruction.

Figure 13 batches the top pinch roll of usefulness pinch roll to the pressure of band steel and the time chart of hydraulic cylinder oiling instruction.

Figure 14 is the side view that batches after being offset with pinch roll.

Figure 15 is with the side view that batches will depress with steel with the top pinch roll of pinch roll the time.

Figure 16 is total skeleton diagram of general Continuous Heat rolling line.

Figure 17 is the key diagram that is used to illustrate in the heap steel phenomenon of batching the outlet side band steel tail end of using pinch roll.

Figure 18 is used to illustrate at the key diagram of the top pinch roll that batches the usefulness pinch roll to the problem under the little situation of the pressure of band steel.

Figure 19 is the key diagram that is used to illustrate batching with the heap steel phenomenon of row band steel front end behind the entrance side of pinch roll.

Figure 20 is the schematic diagram of expression carrousel formula taking-up equipment.

Figure 21 is the key diagram that is used to illustrate in the heap steel phenomenon of batching the outlet side band steel tail end of using pinch roll.

The optimal morphology that carries out an invention

Below, with reference to accompanying drawing embodiments of the invention are described.

At first, with reference to Fig. 1～Fig. 3 to embodiments of the invention 1, be that strip coiling method on the general hot rolling line describes.

Fig. 1 is simply to be the figure of downstream part of the band steel cutter of expression Continuous Heat rolling line, and in this embodiment, with following situation as an example, the band steel of sending from finishing mill (not shown) is with steel S with being with steel cutter 102 to cut into specific length in advance ₁Batch with pinch roll (the 2nd batch use pinch roll) 103, batch by the downstream, simultaneously back row band steel S with the reel 107 of downstream devices for taking-up 104 ₂Batch with pinch roll (the 1st batch use pinch roll) 105, batch by the upstream side that is configured in band steel cutter 102 outlet sides with the reel 107 of upstream side devices for taking-up 101.

Downstream devices for taking-up 104 and upstream side devices for taking-up 101 all twist in the means that the band steel on the reel 107 is used as the coiling tension tension with regulation, comprise respectively with the lower part: detect the torque master 109 of the torque of motor 108, this motor is used to drive reel 107 revolutions; Torque control unit 110, this device carries out FEEDBACK CONTROL to motor 108, so that the detection torque value that obtains with torque master 109 is consistent with target torque value, makes strip tension keep certain value; Be used to detect the auxiliary generator (PLG) 111 of the turn state of motor 108; Speed control unit 112, this device are used for motor 108 is carried out FEEDBACK CONTROL, so that the speed detected value that auxiliary generator 111 obtains is consistent with target velocity.

The downstream is batched with pinch roll 103 and is comprised following part: the torque master 114 that the torque of the motor 113 of detection bottom pinch roll 103a is used; The auxiliary generator (PLG) 115 that the turn state of detection motor 113 is used; Speed control unit 116, this device are used for motor 113 is carried out FEEDBACK CONTROL, so that speed detected value that auxiliary generator 115 obtains and target velocity V _P1Consistent.

In addition, upstream side batches with pinch roll 105 and comprises following part too: the torque master 118 that the torque of the motor 117 of detection bottom pinch roll 105a is used; The auxiliary generator (PLG) 119 that the turn state of detection motor 117 is used; Speed control unit 120, this device are used for motor 117 is carried out FEEDBACK CONTROL, so that speed detected value that auxiliary generator 119 obtains and target velocity V _P2Consistent.From downstream devices for taking-up 104 side devices for taking-up 101 conversion upstream the time, can depress the band steel in order to make top pinch roll 105b along roll line side shifting upstream during bottom pinch roll 105a change deviation angle, can should be with steel to depress by hydraulic cylinder 121.Pressure detector 122 is installed on top pinch roll 105b, is used to detect the pressure that is applied on this top pinch roll 105b.

In order to make the detected pressures that pressure detector 122 obtains consistent with the setting pressure of setting with compensatory pressure setting apparatus 124 in advance, the pressure that is applied on the top pinch roll 105b by hydraulic cylinder 121 is to determine like this: by Withdrawal roll pressure control device 125 FEEDBACK CONTROL servo valves 127, this servo valve is used to switch the oil of supplying with hydraulic cylinder 121 from hydraulic pump 126.Also can control the pressure of pinch roll with air.

Below, the situation from downstream devices for taking-up 104 side devices for taking-up 101 conversion is upstream described, at first, batch at reel 107 and to be with steel S in advance with downstream devices for taking-up 104 ₁During this time, by hydraulic cylinder (not shown) etc. upstream side is batched with the bottom pinch roll 105a of pinch roll 105 along roll line side shifting upstream, the throughput direction that changes like this that upstream side batches with the deviation angle of pinch roll 105 and in advance will the band steel from downstream devices for taking-up 104 upstream side devices for taking-up 101 change, can be with steel S in advance ₁Leaving upstream side batches with immediately the back row being with steel S behind the pinch roll 105 ₂Be directed to upstream side devices for taking-up 101 sides.Among Fig. 1, symbol 128 is to be used to prevent back row band steel S ₂Front end enter the triangle door of downstream devices for taking-up 104 sides.

Be with steel S in advance ₁Twist under the state on the reel 107 of downstream devices for taking-up 104, when cutting off the band steel with band steel cutter 102, the present invention is with steel S by host computer (not shown) with what the speed control unit 112 of devices for taking-up 104 obtained in advance when carrying out above-mentioned cut-out ₁Setting coiling speed Vm, upstream side batch target velocity V with the speed control unit 120 of pinch roll 105 sides _P2, the downstream batches the target velocity V with the speed control unit 116 of pinch roll 103 sides _P1And the back row band steel S after just having cut off ₂Transporting velocity Vs (=before just having cut off band steel transporting velocity) set Vm＞V for _P1＞V _P2＞Vs.

Be described in detail below

Now, be with steel S in advance ₁Twist under the state on the reel 107 of downstream devices for taking-up 104, when having finished the cut-out of band steel with band steel band cutter 102, the cut-out cut-out of this situation signal that finishes that finishes is notified the speed control unit 112 of downstream devices for taking-up 104 respectively by band steel cutter 102 or host computer, and the speed control unit 120 that batches usefulness pinch roll 105 with the speed control unit 116 of pinch roll 103 and upstream side is batched in the downstream.

The signal that this cut-out finishes is at time t ₀Notify, then with this time t ₀Corresponding, the reel 107 of downstream devices for taking-up 104 switches to the speed control that speed control unit 112 is carried out from the tension force control that torque control unit carried out.Simultaneously, with this time t ₀Corresponding, speed control unit 112 begins to accelerate the coiling speed with steel, and shown in the curve I of Fig. 2, the final speed V after the speed of its quickening begins to quicken to finish with X _mSpeed control for (1) formula.

V _m=Vs×A…(1)

In the formula, Vs is the band steel transporting velocity before cutting off, and A is leading rate (coefficient that the decision final speed is used).

In addition, at time t ₀The time be with steel S in advance ₁With back row band steel S ₂State shown in Fig. 3 (A).

Quickening time started t from this ₀To time t ₁Till T time delay ₁During this time, batch the speed control unit 116 of using pinch roll 103, the downstream is batched with the speed of pinch roll 103 keep the preceding strip speed Vs of cut-out by the downstream.But one to time t ₁Just speed control unit 116 begins to accelerate the downstream and batches the speed of using pinch roll 103, and shown in the curve II of Fig. 2, the final speed V after the speed of its acceleration begins to quicken to finish with Y _P1Speed control for (2) formula.Above-mentioned time delay T ₁Timer or the host computer of timing by speed control unit 116 carry out.

V _p1=Vs×B…(2)

In the formula, B is leading rate, and the pass of leading rate A, B is A＞B.

Quickening time started t from this ₀To time t ₂Till T time delay ₂During this time, batch the speed control unit 120 of using pinch roll 105, upstream side is batched with the speed of pinch roll 105 keep the preceding strip speed Vs of cut-out by upstream side.But one to time t ₂Just speed control unit 120 begins to accelerate upstream side and batches the speed of using pinch roll 105, and shown in the curve III of Fig. 2, the final speed V after the speed of its quickening begins to quicken to finish with Z _P2Speed control for (3) formula.Above-mentioned time delay, timer or the host computer (not shown) of timing by speed control unit of T2 carried out, and time delay, the relation of T1 and T2 was made as T1＜T2.

V _p2=Vs×C…(3)

In the formula, C is leading rate, and the pass of leading rate B and C is B＞C.

Then, one to time t ₃Just, shown in Fig. 3 (B), be with steel S in advance ₁Tail end and back row band steel S ₂Front end lay respectively at upstream side batch with pinch roll 105 be with between the steel cutter 102, be with steel S in advance ₁Tail end and back row band steel S ₂Front end become fully the state that separates.

As shown in Figure 2, to time t ₄The time, the coiling speed of the reel 107 of downstream devices for taking-up 104 reaches final speed Vm, to time t ₅The time, the speed that batch with pinch roll 103 in the downstream reaches final speed V _P1, to time t ₆The time, the speed that upstream side batches with pinch roll 105 reaches final speed V _P2

To time t ₇The time, shown in Fig. 3 (C), be with steel S in advance ₁Tail end batch in the downstream and batch with pinch roll 103 and upstream side, and back row band steel S with between the pinch roll 105 ₂Front end be in and arrive upstream side and batch state with pinch roll 105.

Final speed Vm and final speed V _P1Velocity ratio X, and final speed V _P1With final speed V _P2Speed be shown below than Y.

x=(A·V _m)/(B·V _p1)=A/B…(5)

Y=(B·V _D1)/(C·V _D2)=B/C…(6)

Therefore, for example leading rate A, B, C are set at A=1.5, B=1.1, C=1.05, then velocity ratio x, y are shown below.

Velocity ratio x=(1.5/1.1)=1.045 ... (7A)

Velocity ratio y=(1.1/1.05)=1.048 ... (7B)

The batching property aspect of downstream devices for taking-up 104 from the band steel, leading rate A, B, C are better, but under the bigger situation of leading rate, deceleration energy when batching is attached on the band steel, so produce excessive tension force on the band steel after the finish rolling, strip width is dwindled, be a problem qualitatively, therefore according to thickness of slab, determine batching property at first by rule of thumb.

In addition, downstream devices for taking-up 104 and downstream are batched with the velocity ratio of pinch roll 103 in accelerator and are also preferably guaranteed above-mentioned velocity ratio X, and the downstream is batched to batch with the velocity ratio of pinch roll 105 in accelerator with pinch roll 103 and upstream side and also preferably guaranteed above-mentioned velocity ratio Y.

Guarantee to be above-mentioned velocity ratio for downstream devices for taking-up 104 and downstream are batched with the velocity ratio of pinch roll 103 in accelerator, with (5) formula, following formula is set up.

(Vs+X·T1)/Vs=A/B…(8)

In the formula, X is the accelerating velocity of downstream devices for taking-up 104, and T1 is time delay shown in Figure 2.

Change (8) formula of being somebody's turn to do, then time delay, T1 was shown below, and can set time delay by following formula.

T1=(Vs/X)(A/B-1)…(9)

Equally, guarantee to be above-mentioned velocity ratio Y for the downstream being batched batching with the velocity ratio of pinch roll 105 in accelerator with pinch roll 103 and upstream side, following formula is set up.

T3=(Vs/Y)(B/C-1)…(10)

In the formula, Y is the accelerating velocity of batching with pinch roll 103, T ₃As shown in Figure 2, be to batch from the downstream to begin to accelerate to upstream side with pinch roll 103 and batch the time that begins to quicken with pinch roll 105.Therefore, T time delay shown in Figure 2 ₂Can be set at T ₂(T ₁+ T ₃).

In addition, downstream devices for taking-up 104, downstream are batched with pinch roll 103 and upstream side and are batched the back row band steel S that must cut off with the acceleration of pinch roll 105 ₂Front end arrive upstream side and batch with pinch roll 105 and finish before.That is to say each time t shown in Figure 2 ₄, t ₅, t ₆, t ₇Relation must satisfy the condition of following formula.

t ₇＞t ₄,t ₇＞t ₅，t ₇＞t ₆…(11)

Example with regard to above condition describes particularly below.

For example, suppose that it is 10 (m) that upstream side batches with the distance between pinch roll 105 and the band steel cutter 102, (the back row band steel S after=firm cut-out of the speed Vs before the band steel cuts off ₂Transporting velocity Vs) be 900 (mpm), the back row band steel S after then cutting off ₂The time that the arrival upstream side batches with pinch roll 105 is 10m/ (900mpm/60sec)=0.67 (sec).

In addition, suppose that leading rate A is A=1.15, then the final speed Vm of the reel 107 of downstream devices for taking-up 104 is Vm=900 * 1.15=1035 (mpm).Owing in the time of 0.67 (sec), speed is accelerated to 1035 (mpm) from 900 (mpm), so rate of acceleration X is (1035-900)/0.67=201 (mpm/S).

Set the band steel S after cut-out by carrying out such speed ₁On, owing to take V between the pinch roll 105 in band steel cutter 102 rolling _P2＞Vs, thus by batching the pulling force that pulls to the downstream is arranged with pinch roll 105 effects, owing to batching with pinch roll 105 and batching with V between the pinch roll 103 _P1＞V _P2So, by batching the pulling force that pulls to the downstream is arranged, owing to batching Vm＞V between the reel 107 of using pinch roll 103 and downstream devices for taking-up 104 with pinch roll 103 effects _P1So, the pulling force that pulls to the downstream is arranged by reel 107 effects.

Therefore, can prevent batch outlet side, be between devices for taking-up 104 and downstream are batched with pinch roll 103 with pinch roll 105, and the downstream batch and be with steel S between batching with pinch roll 105 with pinch roll 103 and upstream side in advance ₁Tail end produce heap steel phenomenon, its result also can prevent to be with steel S in advance ₁Tail end hangs on the triangle door 26 and makes this band steel breakage, and owing to carries out such speed and set, be V _P2During＞Vs, batch with the feed rate of pinch roll 105 and be with steel S than the back row ₂Transporting velocity fast, therefore, can prevent back row band steel S ₂Front end batching with the entrance side of pinch roll 105 heap steel.

In addition, when the change upstream side batches with the deviation angle of pinch roll 105, if it is little that top pinch roll 105b depresses the pressure of band steel, then can not batch the tail end that fully clamps the band steel that the reel 107 with downstream devices for taking-up 104 batches with pinch roll 105 with upstream side, so the tail end of this band steel can not be batched with pinch roll 105 by upstream side and fully push and produce slip, as shown in figure 18, between downstream devices for taking-up 104 and upstream side devices for taking-up 101, produce heap steel phenomenon.Therefore, in this embodiment, set to batch with pinch roll 105 and can positively clamp the pressure of being with steel, before carrying out above-mentioned cut-out, batch with pinch roll 105 clamping positively and be with steel S in advance with upstream side with upstream side ₁

Below, be elaborated.

As shown in Figure 1, the pressure detector 122 that batches with pinch roll 105 at upstream side is arranged under the situation of top pinch roll 105b one side, is with steel S in advance ₁Twist under the state on the reel 107 of downstream devices for taking-up 104, when the change upstream side batches with the deviation angle of pinch roll 105, must be according to the side-play amount of bottom pinch roll 105a, depress from roll line and to be with steel S in advance ₁, use bottom pinch roll 105b, this band steel of 105a clamping S ₁In example shown in Figure 1,, batch top pinch roll 105b with pinch roll 105 with upstream side and depress and be with steel S in advance by hydraulic cylinder 121 ₁, with compensatory pressure setting apparatus 124 settings pressure at this moment.

Compensatory pressure setting apparatus 124 is to be used to set batch with the top pinch roll 105b and the certain clamping of bottom pinch roll 105a of pinch roll 105 with upstream side be with steel S in advance ₁Compensatory pressure, the change upstream side batches with after the deviation angle of pinch roll 105, until be with steel S with 102 cut-outs of band steel cutter in advance ₁Tail end during appropriate time, control rate control device 120, the Velocity Reference that makes bottom pinch roll 105a is than be with steel S in advance ₁Plate speed Vs low slightly, in this state, till the detection torque value T that measures with torque master 118 reaches predefined setting value T.Carry out FEEDBACK CONTROL by 125 pairs of servo valves of Withdrawal roll pressure control device 126, continue pushing band steel S ₁

Be with steel S at the Velocity Reference ratio that makes bottom pinch roll 105a in advance ₁Lower slightly the situation of plate speed Vs under, be with steel S if can not depress with required pressure in advance ₁, the load that then is applied on the bottom pinch roll 105a is not too big, so the torque of bottom pinch roll 105a does not increase, is with steel S and depress with required pressure in advance ₁The time, be with steel S in advance ₁And produce slip between the bottom pinch roll 105 and load (torque) is increased.Utilize this point, calculate that compensation making pressure (sandwiches with top pinch roll 105b and bottom pinch roll 105a in this case and is with steel S in advance ₁Power) Ps (N).

That is, suppose to be with steel S in advance ₁With the speed difference of bottom pinch roll 105a be Δ V (mpm), be with steel S because of what speed difference Δ V changed in advance ₁With the coefficient of friction of bottom pinch roll 105a be μ ₂(Δ V), the actual torque of bottom pinch roll 105a are T (Nm), and the radius of bottom pinch roll 105a is r (m), then sandwich with top pinch roll 105b and bottom pinch roll 105a and are with steel S in advance ₁Power Ps (N) can be represented by the formula.

Ps=T/[r·μ ₂(ΔV)]…(12)

Therefore, as long as the μ when obtaining fixing speed difference Δ V in advance ₂Value by measuring the actual torque T of bottom pinch roll, just can be obtained compensation making pressure P s by (12) formula.

In the pressure setting method that carries out with compensatory pressure setting apparatus 124, cut off, be with in advance steel S even obtain in advance with above-mentioned band steel cutter 102 ₁Tail end does not go out the available upstream side in fold ground yet and batches with pinch roll 105 clamping band steel S ₁Above-mentioned compensation making pressure P s ₁, before above-mentioned cut-out, establish the speed of bottom pinch roll 105a than band steel S ₁The situation of the low fixing speed Δ V of plate speed Vs under, pre-set this compensation making pressure is Ps in above-mentioned compensatory pressure setting apparatus 124 ₁The time the torque value T of bottom pinch roll 105a ₀Then, this compensatory pressure setting apparatus 124 was sent into signal speed control unit 120 before carrying out above-mentioned cut-out, so that the speed of above-mentioned bottom pinch roll 105a is than the low Δ V of above-mentioned plate speed Vs, then, Withdrawal roll pressure control device 125 is sent signal in actual torque T, limit that bottom pinch roll 105a is measured with torque master 118 in the limit, so that depress band steel S by top pinch roll 105b ₁Making this actual torque T is greater than T ₀Value.Therefore, can become with upstream side and batch with pinch roll 105 clamping band steel S positively ₁State.In this state, be with steel S with 102 cut-outs of band steel cutter in advance ₁Tail end.

Therefore, under the situation of using compensation pressure setting apparatus 124, owing to consider that practical function is in be with steel S in advance ₁On power and setting pressure is with steel S so can batch with the top pinch roll 105b and the bottom pinch roll 105a clamping positively of pinch roll 105 with upstream side in advance ₁And preventing to produce sliding phenomenon, the result can prevent to be with steel S well in advance ₁Tail end between downstream devices for taking-up 1 and upstream side devices for taking-up b, produce heap steel phenomenon.

In addition, by host computer control Vm＞V _P1＞V _P2＞VS utilizes compensatory pressure setting apparatus 124 to press and is with steel S in advance ₁, be performed until in advance tail end with steel S1 and batch till on the reel 107 of downstream devices for taking-up 104.

In this embodiment, the situation of the reel 107 with downstream devices for taking-up 104 being batched the band steel is illustrated, and is with the occasion of steel also can use the present invention but batch with the reel 107 of upstream side devices for taking-up 101.

Below, with reference to Fig. 4, to embodiments of the invention 2, promptly the strip coiling method that disposes on the hot rolling line of carrousel formula taking-up equipment describes.The basic comprising of carrousel formula taking-up equipment and the Continuous Heat rolling line all situation with explanation in existing example (Figure 20 and Figure 21) is identical, and therefore, repeating part adopts identical symbol and omits explanation.

Fig. 4 is a part of representing the band steel cutter downstream of Continuous Heat rolling line briefly, and in this embodiment, with following situation as an example, the band steel of sending from finishing mill (not shown) cuts into specific length with band steel cutter 5, is with steel S in advance ₁Use pinch roll 17 by being configured in batching of band steel cutter 5 outlet sides, batch with the reel (being the 2nd reel 2 among the figure) that batches the ultimate position, the back row is with steel S simultaneously ₂By batching with pinch roll 17, batching with the reel (being the 1st reel 1 among the figure) that batches the starting position.

Be positioned on the 2nd reel 2 that batches the ultimate position, the mechanism as being used for twisting in the coiling tension tension of regulation the band steel on the reel 2 comprises following part: the torque master 34 that the torque of detection motor 32 is used, these motor-driven reel 2 revolutions; Make the tension force of band steel keep certain torque control unit 36, this device carries out FEEDBACK CONTROL to motor 32, so that torque master 34 resulting detection torque values are consistent with target torque value; The auxiliary generator (PLG) 38 that the turn state of detection motor 32 is used; Speed control unit 40, this device carries out FEEDBACK CONTROL to motor 32, so that auxiliary generator 38 resulting speed detected values are consistent with target velocity.

Be positioned on the 1st reel 1 that batches on the starting position, the mechanism as being used for twisting in the coiling tension tension of regulation the band steel on the reel 1 comprises following part too: the torque master 33 that detects the torque of the motor 31 that drives reel 1 revolution usefulness; Make the tension force of band steel keep certain torque control unit 35, this device carries out FEEDBACK CONTROL to motor 31, so that torque master 33 resulting detection torque values are consistent with target torque value; Detect the auxiliary generator (PLG) 37 of the turn state of motor 31; Speed control unit 39, this device are used for motor 31 is carried out FEEDBACK CONTROL, so that auxiliary generator 37 resulting speed detected values are consistent with target velocity.

Batch with pinch roll 17 and be provided with auxiliary generator (PLG) 42 and speed control unit 43, wherein auxiliary generator is used to detect the turn state of the motor 41 of bottom pinch roll 17a, speed control unit is used for motor 41 is carried out FEEDBACK CONTROL, so that the speed detected value that auxiliary generator 42 obtains is consistent with target velocity Vp.Batching can be by hydraulic cylinder 44 pushing band steel with the top pinch roll 17b of pinch roll 17, and this hydraulic cylinder is used for the band steel is pressed to bottom pinch roll 17a one thruster.

Then, to being illustrated to the situation that the reel that batches the starting position (being the 1st reel 1 among the figure) switches, at first, be with steel S with 2 pairs on the 2nd reel from the reel (being the 2nd reel 2 figure) that batches the ultimate position in advance ₁During batching, the top pinch roll 17b that this batches with pinch roll 17 is depressed, batch with pinch roll 17 clamping band steel S so that utilize by hydraulic cylinder 44 ₁In this state, will be with steel S with band steel cutter 5 ₁Tail end cut off, in this embodiment, by not shown host computer, will cut off back reel 2 speed control unit 40 settings be with steel S in advance ₁Setting coiling speed Vm and when cutting off with respect to batching be with steel S before the target velocity Vp of the speed control unit 43 of pinch roll 17 and the cut-out in advance ₁Very fast degree Vs between relation set Vm＞Vp＞Vs for.

Carry out speed like this and set, owing to be with steel cutter 5 and batching with Vp＞Vs between the pinch roll 17, so the band steel S after cut-out ₁On acting on the power of batching with pinch roll 17 side tension downstream, batching with Vm＞Vp between pinch roll 17 and the reel 2, so on the band steel after the cut-out, acting on the power of reel 2 side tension downstream.

Therefore, the outlet side batching with pinch roll 17 can prevent to be with steel S in advance ₁Produce heap steel phenomenon, the result can prevent to be with steel S in advance ₁Hang over and be positioned at upstream side roll line P ₁With downstream roll line P ₂Along separate routes on the front end of locational downstream guide plate 13 and cause the phenomenon of band steel breakage, during and Vp＞Vs, set to such an extent that go than the back and be with steel S because of batching transporting velocity Vp with pinch roll 17 ₂Transporting velocity Vs big, so can prevent back row band steel S ₂Front end produce heap steel phenomenon batching with the entrance side of pinch roll 17.Plate speed Vs can obtain actual value according to the target velocity of cutting off head-pulley 2 or the roll speed of gyration of finishing mill, according to the actual value of plate speed Vs Vm, Vp is set for and satisfies above-mentioned condition and get final product.

Here, before carrying out above-mentioned cut-out, can give and band steel S by finishing mill and reel 2 ₁Tension force, the control of being undertaken by reel 2 of batching so far is preferably controlled batching torque.

That is to say, motor 32 is carried out FEEDBACK CONTROL,, and make band steel S so that the detection torque value of the motor 32 that torque master 34 records is consistent with target torque value ₁Tension force keep certain, then, cut off band steel S with band steel cutter 5 ₁Tail end after, be rolled into roll coil of strip shape immediately, push down the band steel S that is rolled into roll coil of strip shape with wrapper roll 19 ₁, make reel 2 decelerations simultaneously and stop revolution.After revolution stops, taking off band steel S from reel 2 ₁The roll coil of strip.

Cut off band steel S with band steel cutter ₁Afterwards, because of between finishing mill and reel 2, can not applying tension force, thus batching of after cutting off, reel 2 being carried out after control changes speed control into from torque control, all can be before cutting off by torque control to being with steel S ₁Apply tension force, will be with steel S ₁Batch in tension, and, can be after cut-out with band steel S ₁Coiling speed set Vm＞Vp＞Vs for.

In addition, also can be with steel S with 5 cut-outs of band steel cutter in advance ₁Before, convert the control of batching of reel 2 to speed control from torque control in advance.

Then, with reference to Fig. 5～Fig. 7, the strip coiling method of the embodiment of the invention 3 is illustrated.Present embodiment is an example with the situation that is applicable to the 1st embodiment applicable to the above-mentioned the 1st and the 2nd embodiment here.Therefore, the part with the 1st embodiment repeats adopts prosign with reference to Fig. 1, omits its explanation.

The band steel is before being cut off, and batching of band steel cutter outlet side uses pinch roll 105 with the speed revolution same with band steel Target Board speed Vs (m/s).The band steel is with after 102 cut-outs of steel cutter, will batch the Target Board speed V with pinch roll 105 _P2(m/s) be set at big value, will be with steel S in advance than band steel Target Board speed Vs ₁Setting coiling speed Vm (m/s) be set at than batching with the Target Board of pinch roll 105 speed V _P2Big value.Therefore, the rotating speed that batches with pinch roll 105 is cut off the back rising at the band steel.When be with steel S in advance ₁Plate speed soon be elevated to when setting coiling speed Vm, batch to push down and be with steel S in advance with pinch roll 105 ₁So this batches rotating speed with pinch roll 105 often along be with steel S in advance ₁Plate speed rising and rise near the value of setting coiling speed Vm.

At this moment, because of batching Target Board speed V with pinch roll 105 _P2Set than set coiling speed Vm, promptly be with steel S after cutting off in advance ₁Plate speed little, make to batch and produce torque so batch motor 117 (drive unit) with the bottom pinch roll 105a of pinch roll 105 in a side of slowing down with pinch roll 105.For this reason, after cut-out, the load torque of motor 117 changes reverse directions into from positive veer.And, when be with steel S in advance ₁Tail end break away from and to batch with behind the pinch roll 105, batch with pinch roll 105 and slow down, but under the situation of the band steel thicker at thickness of slab, that flexural rigidity is big, batch with 105 pairs of pinch rolls and be with steel S in advance ₁Pressure big, therefore, be with steel S in advance ₁During by this pinch roll 105, increase, be with steel S in advance to the torque of the deceleration side of motor 117 ₁Tail end break away from and to batch with after the pinch roll 105, when this batches with pinch roll 105 decelerations, although speed is set at V _P2＞Vs, but as shown in Figure 7, it is little to batch the Target Board speed (speed of back row band steel) that the rotating speed moment with pinch roll 105 is reduced to than the band steel, is stabilized in thereafter and sets plate speed V _P2

Be with steel S in advance ₁Tail end leaves and batches with behind the pinch roll 105, until back row band steel S ₂Front end nipped and batched with till the nip rolls 105 only about 0.3 second, the time is very short, so as mentioned above, batches with row behind the rotating ratio of pinch roll 105 and is with steel S ₂Plate speed Vs when slow, row is with steel S when the back ₂Front end nipped and batched when the pinch roll 105 be with steel S because this batches with the speed of sending into of sending into the band steel of pinch roll 105 than the back row ₂Plate speed low, so as shown in figure 19, batching with row band steel S behind the entrance side of pinch roll ₂Front end just form heap steel phenomenon.

Therefore, in the present embodiment, batching drive unit, be the torque limit T that establishes deceleration side on the motor 117 with pinch roll 105 _Max(Nm), control, make the load torque of motor 117 be no more than the torque limit T of deceleration side by 120 pairs of motor 117 of speed control unit _Max

Here, back row band steel S ₂Front end nipped and batched when the pinch roll 105, as shown in Figure 6, be not less than the back row and be with steel S in order to make this batch rotating speed with pinch roll 105 ₂Plate speed Vs, torque limit T _MaxValue can as following, obtain.

With reference to Fig. 5, the situation of batching with the bottom pinch roll 105a of pinch roll 105 with driving is an example, to being set in torque limit T on the motor 117 that drives this bottom pinch roll 105a, deceleration side _MaxValue describe.

Bottom pinch roll 105a drives revolution by gear 221,222 by motor 117.Fig. 5 is that expression is with steel S with pinch roll 105 pushings in advance ₁State, under this state owing to be with steel S in advance ₁Plate speed Vs than the setting plate speed V of bottom pinch roll 105a _P2Greatly, thus bottom pinch roll 105a from be with steel S in advance ₁The place only is subjected to the power of F (N), and motor 117 produces therewith the torque T of antagonism mutually _M(Nm).

At time t, suppose that bottom pinch roll 105a is subjected to from be with steel S in advance ₁Power be F (t) (N), to resist the torque that produces therewith mutually be T to motor 117 _M(t) (Nm), the moment of inertia of bottom pinch roll 105a and gear 221 is J ₂(Nm ²), motor 117 is J with the moment of inertia of gear 222 ₁(Nm ²), be with steel S in advance ₁The angular speed of the bottom pinch roll 105a of tail end when soon leaving coiling clamp roller 105 be ω ₂(rad/sec), the angular speed of motor 117 is ω ₁(rad/sec), the torque that produces on the gear 222 be T (t) (Nm), the speed reducing ratio of gear 221 and gear 222 is that the roller of i, bottom pinch roll 105a directly is D (m), then the mechanical equation formula of following formula (13) is set up.Here, T _Mjust the change one's position torque of (acceleration side) of symbol hypothesis be "+", the torque of counter-rotating side (deceleration side) is "-". $\frac{1}{i}{T}_{\left(t\right)}-F_{\left(t\right)}\frac{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">D</figure-callout>}}{2}=J_2\frac{d{\mathrm{\&omega;}}_2}{\mathrm{dt}}---\left(13\right)$

Between motor 117 and gear 222, the mechanical equation formula of following formula (14) is set up. $T_{M\left(t\right)}-T_{\left(t\right)}=J_1\frac{{\mathrm{d\&omega;}}_1}{\mathrm{dt}}----\left(14\right)$

If eliminate T by (13) formula and (14) formula _(t), then following formula (15) is set up. $T_{M\left(t\right)}-i\&bull;F_{\left(t\right)}\frac{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">D</figure-callout>}}{2}=(J_1+{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">J</figure-callout>}}_2\&bull;i^2)\frac{{\mathrm{d\&omega;}}^1}{\mathrm{dt}}---\left(15\right)$

If with (15) formula integration, then following formula (16) is set up. ${\&Integral;}_{11}^{12}(T_{M\left(t\right)}-i\&bull;F_{\left(t\right)}\&bull;\frac{D}{2})\mathrm{dt}$ $=(J_1+{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">J</figure-callout>}}_2\&bull;i^2){\&Integral;}_{{\mathrm{\&omega;}}_{t1}}^{{\mathrm{\&omega;}}_{t2}}d{\mathrm{\&omega;}}_1---\left(16\right)$

Here, ω t ₁, ω t ₂Be respectively time t ₁, t ₂The time the angular speed of bottom pinch roll 105a.(16) in the formula, be with steel S in advance ₁Tail end leave and batch with behind the pinch roll 105, up to back row band steel S ₂Front end batched with during before the pinch roll 105 F (t)=0 by nipping.

At this, to be with steel S in advance ₁Tail end leave batch when the pinch roll 105 (t=0), up to back row band steel S ₂Front end nipped and batched [t=t when the pinch roll 105 ₂(sec)] the velocity variable Δ ω (rad/sec) of bottom pinch roll 105a calculates.Slow down when the symbol of variation delta ω is "-", quicken during for "+".

So, (16 formula) available following formula (16A) expression. ${\&Integral;}_0^{t2}{T}_{M\left(t\right)}\mathrm{dt}=(J_1+{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">J</figure-callout>}}_2\&bull;i^2){\&Integral;}_{{\mathrm{\&omega;}}_0}^{{\mathrm{\&omega;}}_{t2}}d{\mathrm{\&omega;}}_1---\left(16A\right)$

T _{M (t)}Be to be with steel S in advance ₁During whipping from T _MaxChange to "+" side,, suppose T here merely in order on stricter (big) direction, variation delta ω to be estimated _{M (t)}=T _Max, following formula (17) is set up. ${\&Integral;}_0^{t2}{T}_{\max }\&bull;\mathrm{dt}=(J_1+{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">J</figure-callout>}}_2\&bull;i^2){\&Integral;}_{{\mathrm{\&omega;}}_0}^{{\mathrm{\&omega;}}_{t2}}d{\mathrm{\&omega;}}_1---\left(17\right)$

Separate (17) formula, be with steel S in advance ₁Tail end leave after the pinch roll, through t ₂The variation delta ω of bottom pinch roll represents with formal (18) after time. $\mathrm{\&Delta;\&omega;}=\frac{T_{\max }\&bull;t_2}{J_1+{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">J</figure-callout>}}_2\&bull;i^2}-----\left(18\right)$

If back row band steel S ₂The transporting velocity Vs of front end satisfies following formula (19), then row band steel S behind the entrance side of bottom pinch roll 105a ₂Front end just can not produce heap steel phenomenon. $V_S\&le;({\mathrm{\&omega;}}_0+\mathrm{\&Delta;\&omega;})\frac{D}{2}---\left(19\right)$

Here, because ω.Can be than the set angle speed omega p of bottom pinch roll 105a ₂Little, so even be similar to ω ₀≈ ω p ₂There is not any problem yet, therefore, at the entrance side that batches with pinch roll 105, as long as make back row band steel S ₂Front end do not produce the T of heap steel phenomenon _MaxSatisfying above-mentioned (18) formula gets final product with the relation of (19) formula to following formula (20-4). $V_S\&le;({\mathrm{\&omega;}}_0+\mathrm{\&Delta;\&omega;})\frac{\mathrm{<figure-callout\; id="2"\; label="D"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">D</figure-callout>}}{2}$ $=({\mathrm{\&omega;}}_{\mathrm{<figure-callout\; id="2"\; label="p"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">p</figure-callout>}2}+\frac{T_{\max }\&bull;t_2}{J_1+{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">J</figure-callout>}}_2\&bull;i^2})\&times;\frac{D}{2}-------(20-1)$ $\frac{V_S\&times;2}{D}-{\mathrm{\&omega;}}_{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">P</figure-callout>}2}\&le;\frac{T_{\max }\&bull;t_2}{J_1+{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">J</figure-callout>}}_2\&bull;i^2}-----(20-2)$ $\frac{J_1+{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">J</figure-callout>}}_2\&bull;i^2}{{\mathrm{<figure-callout\; id="2"\; label="t"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">t</figure-callout>}}_2}\&bull;(\frac{{2V}_s}{D}-{\mathrm{\&omega;}}_{P2})\&le;T_{\max }---(20-3)$ $\frac{2(J_1+{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">J</figure-callout>}}_2\&bull;i^2)(V_S-{\mathrm{\&omega;}}_{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">P</figure-callout>}2}\&bull;D/2)}{\mathrm{<figure-callout\; id="2"\; label="D\; t"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">D</figure-callout>}{t}_{}{}_2}\&le;T_{\max }---(20-4)$

At this, obtain Vs-ω from (20-4) formula _P2D/2=Vs-V _P2, this is because V _P2Therefore the cause of＞Vs, judges T according to (20-4) formula _MaxApproximate number greater than 1.That is, can calculate the torque limit of deceleration side.

Can prejudge back row band steel S ₂The moment of inertia J of the transporting velocity Vs of front end, motor 117 and gear 222 ₁, bottom pinch roll 105a and gear 221 the moment of inertia J ₂, bottom pinch roll diameter D, speed reducing ratio i, bottom pinch roll 105a the set angle speed omega _P2, and, about be with steel S in advance ₁Tail end leave and batch with after the pinch roll 105, to back row band steel S ₂Front end batched by nipping with the time t before the pinch roll 105 ₂, also can be from back row band steel S ₂Transporting velocity Vs be with steel S in advance ₁The relation of coiling speed Vm judge in advance, therefore, as long as set the T that satisfies above-mentioned (20-4) formula _MaxGet final product.

Like this, batching with on the drive motors 117 of pinch roll 105, as long as set the torque limit T of deceleration side _Max, then cut off after the band steel, batch with pinch roll 105 pushings and be with steel S in advance ₁During, according to be with steel S in advance ₁Target coiling speed Vm (the setting coiling speed of downstream devices for taking-up 104) and the Target Board speed V that batches with pinch roll 105 _P2Speed difference and the load torque of the deceleration side of the motor 117 that produces just can not be excessive, be with steel S in advance ₁Tail end just left and batched with behind the pinch roll 105, batching can be less than back row band steel S with the rotating speed of pinch roll 105 yet ₂Plate speed Vs.

Then, with reference to Fig. 8～Figure 10, with regard to embodiments of the invention 4, promptly the method for coiling with steel is illustrated.

In the strip coiling of continuously hot rolling, between finishing mill and reel, give strip tension, just can carry out stable wearing and be with and batch.Here, as the means that apply tension force, generally be to apply the so big tension force of setting best in advance of tension force benchmark, this tension force benchmark be applied to tension force benchmark, the coiling temperature condition when basis is batched on the band steel when batching and the steel grade of the band steel that batches etc. predefined, carry out tension force control by produce torque on reel when batching, this torque can impose on the band steel to the tension force that equates with this tension force benchmark.

; in hot continuous rolling; after the band steel that finishing mill is sent cuts off; alternately batch on several reels; so it is very short to the time that next band steel begins to batch that each reel batches the back that finishes; the roll coil of strip (band steel) of trying one's best after will batching at short notice takes off, and must finish the preparation that the next one batches in a short period of time.Therefore, though the revolution of the reel after need stopping at short notice batching, but since batch finish before wrapper roll (hold-down roller) contact with the belt steel surface that is rolled into roll coil of strip shape, so the reel rotating torque of this wrapper roll generation obstruction in batching, so the reel deceleration.Its result, the band steel between wrapper roll and pinch roll produces lax, and causes being with steel heap steel phenomenon.

In order to simulate, the roll coil of strip as rigid rotator, is selected for use model shown in Figure 8 with general hot rolling reeling model.

That is to say that the torque that the internal diameter of establishing the roll coil of strip is that a (m), external diameter are b (m), to act on the tension force of band on the steel be T (KN), be created on the reel is T _MD(KNm), in addition, the inertia force of establishing the roll coil of strip is I _c, when angular speed is ω (rad/s), be expressed as follows for the formula of the sport dynamics of the roll coil of strip.

I _c(dω/dt)=T _MD(a/2)-T(b/2)-4F…(21)

But F is the tension force that 1 wrapper roll produces, and is provided with 4 wrapper rolls on the devices for taking-up of general hot rolling mill.

In above-mentioned (21) formula, stage the 3rd of the formula in the right side before wrapper roll contacts with the strip is zero, under the situation of reel being carried out tension force control, because the torque that reel is taken place is controlled to the 1st and the 2nd balance, so levoform is zero invariablely.

, under the abnormal condition of the moment that wrapper roll contacts with the strip, levoform becomes negative, produces negative angle speed, and promptly reel slows down.In this case, reduce with the tension force of steel, the band steel produces relaxation between wrapper roll and pinch roll.This lax can form the loose winding of the outer volume of the so-called roll coil of strip or be turriform etc. batch unfavorable condition.

Therefore, in this embodiment, realize the stable strip coiling of continuously hot rolling.In addition, present embodiment is an example with the situation that is applicable to embodiment 2 applicable to the foregoing description 1 and embodiment 2 here.Therefore, the partial parameters that repeats with embodiment 2 adopts prosign according to Fig. 4, omits its explanation.

In this embodiment, when for example cutting off the band steel, the revolution of the motor 32 that is in the reel 2 that batches ultimate position control is converted to rotating speed control from the original torque control of carrying out with band steel cutter 5.Specifically, also can switch to rotating speed control according to the timing that makes 5 actions of band steel cutter, because under the state of the torque of controlling reel 2, when cutter 5 cuts off the band steel, removed the tension force that is applied on the band steel, the rotating speed of reel rises, therefore, this rotating speed also can be set at higher limit, when actual speed reaches this higher limit, automatically switches to speed control.

The hydraulic cylinder (all not shown) of wrapper roll 19 by disposing equably along roll coil of strip periphery, have hydraulic pump and servo valve can be provided with respect to reel 2 with advancing and retreat, and utilize drive source (not shown) also can turn round driving.In this embodiment, when carrying out above-mentioned cut-out, after reel 2 being switched to rotating speed control, wrapper roll 19 is contacted with roll coil of strip outer peripheral face, this roll coil of strip is braked.In addition, wrapper roll 19 is beginning to the band steel also to can be used as the guider use of this band steel when batching with reel 2.Hold the position of wrapper roll 19 by position detector (not shown), also can contact with the roll coil of strip accurately with respect to the roll coil of strip.

Then, before strip coiling finishes, measure rotating speed (the plate speed: mpm) and the actual change of torque of reel 2 with regard to following two kinds of situations, both of these case is: continue reel 2 to coiling machine and carry out the situation of torque control and batch when soon finishing as original, match, the torque control of reel 2 is switched to the situation of rotating speed control with the cut-out operation of band steel.

According to this result, the situation of proceeding torque control is shown in Fig. 9, the situation that switches to rotating speed control is shown in Figure 10.That is, though conclusively show among Fig. 9 wrapper roll 19 when contacting with the roll coil of strip drum speed reduce,, as can be seen from Figure 10, cut off from the band steel and to begin to be converted under the situation of speed control, the rotating speed of reel does not reduce, the roll coil of strip does not produce relaxation.

Here, preferably must be than be with steel S in advance with the speed setting of reel 2 ₁Translational speed fast.This be because with reel 2 when torque control switches to rotating speed control, must be faster with the goal-setting of speed controlling value than speed actual value at that time, like this, reel 2 just can be really will the tension of band steel cause.

Wrapper roll 19 and band steel period of beginning to contact be set at from the band steel be cut off during disengaging is batched with pinch roll 17, like this, reel 2 just can make wrapper roll 19 contact with the roll coil of strip in speed control, and simultaneously, wrapper roll 19 can promptly carry out the rotating braking maneuver of the roll coil of strip.

Below, other forms are illustrated.

As mentioned above, before cutting off the band steel with band steel cutter 5, reel 2 twists in band steel on this reel 2 with the coiling tension tension of regulation, carries out torque control like this and batches.Then, cut off the band steel, here, after having carried out above-mentioned cut-out, also continue reel 2 is carried out torque control with band steel cutter 5.After above-mentioned cut-out, apply tension force by pinch roll 17 and 2 pairs of bands of reel steel, proceed in this state to batch.

Then, when wrapper roll 19 is contacted with the roll coil of strip, being applied to original tension force of a size on the band steel, and when with corresponding torque reel 2 being batched, in the moment that this wrapper roll 19 is contacted with the roll coil of strip, the rotating speed of reel 2 reduces, mentioned strain reduces, and the result produces the loose winding phenomenon.Therefore, when wrapper roll 19 was contacted with roll coil of strip outer peripheral face, the mentioned strain setting value was changed into the value higher than former setting value.In above-mentioned (21) formula, 4 wrapper rolls 19 are contacted with roll coil of strip outer peripheral face, like this, the tension force of band steel just only reduces 4F, so when wrapper roll 19 is contacted with the roll coil of strip, the value more than the setting value raising 4F of tension force is got final product.

Below, with reference to Figure 11～Figure 15, the strip coiling method as the embodiment of the invention 5 is described.This embodiment is applicable to the foregoing description 1 and embodiment 2, and still, the pushing force of being carried out without the compensation pushing force setting apparatus 124 of embodiment 1 is set here, but is example with the situation that is suitable for present embodiment.Therefore, the part that repeats with embodiment 1 is omitted its explanation with reference to Fig. 1 prosign.

When changing above-mentioned deviation angle of batching with pinch roll 105, if top pinch roll 105b is improper to the pushing force of band steel, under strip steel situation, downstream devices for taking-up 104 batches is with steel S in advance ₁Tail end just can not be clamped fully by upstream side devices for taking-up 105, so be with steel S in advance ₁Tail end just break away from upstream side and batch with pinch roll 105 and produce heap steel phenomenon, contact with triangle door 128 and tends to produce tail end and break, under the situation of thick band steel, tend to produce and the back row can not be with steel S ₂Normally be directed to the situation in the upstream side devices for taking-up 101.

After the cut-out, be with steel S in advance ₁Break away from and batch with after the pinch roll 105, until back row band steel S ₂Quilt is nipped to batch and is used pinch roll 105 time before long, under the situation of batching this band steel, batches with pinch roll 105 in carrying out pressure control, because of be with steel S in advance ₁Whipping and make pressure load become zero, so the roll gap that batches with pinch roll 105 moves towards closing direction, exist and cause that the back row is with steel S ₂The bad danger of nipping.

Therefore, in the present embodiment, set the suitable pushing force of using pinch roll of batching of band steel cutter outlet side, can prevent to break, also can make the bending direction of back row band steel optimum simultaneously with the tail end of steel.And the front end of back row band steel is nipped to batch with pinch roll can not cause the bad phenomenon of nipping.

Below, be elaborated.

Figure 14 is that expression makes bottom pinch roll 105a upstream the figure of the state of offset L only moves back in the rear flank with respect to top pinch roll 105b.After Figure 15 is expression bottom pinch roll 105a skew, the figure of the state of top pinch roll 105b being depressed with pressure P.

By the long-pending P Δ x of the vertical displacement amount Δ x of the pressure P of pinch roll 105 and the caused pinch roll 105 of this pressure P, be the pressure P work.

When supposing that top pinch roll 105b is positioned at the x position, the pressure that this top pinch roll 105b bears is P (x), and the acting amount of top pinch roll 105b when the position of x=0 depresses to x=Δ x position is with following formula (22) expression. ${\&Integral;}_0^{\mathrm{\&Delta;x}}P\left(x\right)\&bull;\mathrm{dx}-----\left(22\right)$

When top pinch roll 105b will be with steel to depress Δ x, as shown in figure 15, the band steel supposed that to the direction displacement that applies tension force displacement at this moment is Δ u, is F Δ u with the necessary acting amount of the corresponding Δ u of tension force F displacement then.

To be depressed into the state of Figure 15 with steel with top pinch roll 105b, make the flexural deformation of band steel at the entrance side of pinch roll 105 along the outer peripheral face of bottom pinch roll 105a, outlet side at pinch roll 105, the band steel is applied following flexural deformation, promptly be equivalent to along the distortion of the replication of bottom pinch roll 105a bending deformation quantity size and be equivalent to along the replication distortion of the bending deformation quantity size of the outer peripheral face of top pinch roll 105b.

Utilize the bending moment M that produces on the band steel _BEffect, with radius of curvature R, bending acting amount M when producing bending length I crooked _B(1/R) expression supposes that the radius of bottom pinch roll 105a and top pinch roll 105b is respectively R _L, R _U, the part that the band steel is twisted on the bottom pinch roll 105a is made as l along the part that the length of roller, band steel are twisted on the top pinch roll 105b respectively along the length of roller _a, l _b, then pinch roll 105 entrance sides makes the band steel carry out diastrophic acting amount M along pinch roll 105a outer peripheral face _B(l _a/ R _L) expression, along the replication distortion that is equivalent to the bending deformation quantity size of the bottom pinch roll 105a of pinch roll 105 outlet sides, along the flexural deformation of the band steel of the outer peripheral face of top pinch roll 105b and be equivalent to be out of shape needed acting amount and use M respectively along the replication of the bending deformation quantity size of the outer peripheral face of top pinch roll 105b _B(l _a/ R _L), M _B(l _b/ R _U), M _B(l _b/ R _U) expression.

Therefore, flexural deformation, the replication that carries out at the entrance side and the outlet side of pinch roll 105 is out of shape needed acting amount and adds up to 2M _B{ (l _a/ R _L)+(l _b/ R _U).

Moving to the required acting amount in x=Δ x position from top pinch roll 105b by the position of x=0 deducts and makes the difference of band steel in the required acting amount of the method top offset Δ u of tension force F, be out of shape required acting amount and equate with making the flexural deformation of band steel, replication, so following formula (23) is set up. ${\&Integral;}_0^{\mathrm{\&Delta;x}}P\left(x\right)\&CenterDot;\mathrm{dx}-F\&CenterDot;\mathrm{\&Delta;u}$ $=2M_B\{(l_a/R_L)+(l_b/R_u)\}---\left(23\right)$ Here, M _BAvailable following formula (24) expression.

M _B=(1/6)σ _B·t ²·w…(24)

In the formula, the yield stress of establishing the band steel is σ _B, belt steel thickness is that t, strip width are W.

The present inventor confirms, begins state of contact from top pinch roll 105b with the band steel and further depresses, between band steel bomb deformation phases, along with the progress of depressing is depressed needed load to top pinch roll 105b and is the increase of linear function ground.Pressure that Figure 11 shows that top pinch roll and relation to the displacement of the below of top pinch roll displacement.This relation is that the size according to pinch roll, the material of being with steel and size etc. decide gradient.Therefore, if P (x) is regarded as P (o)=oP (Δ x)=P ₀Linear function, then can be expressed as P (x)=P ₀X/ Δ x, so (23) formula can be used following formula (25) expression, according to (25) formula and (24) formula, following formula (26) is set up. $\frac{1}{2}\&bull;p_0\&bull;\mathrm{\&Delta;x}-F\&bull;\mathrm{\&Delta;u}$ $=2M_B\{(l_a/R_L)+(l_b/R_u)\}---\left(25\right)$ $P_0=F\&bull;\frac{2\mathrm{\&Delta;u}}{\mathrm{\&Delta;x}}+\frac{4}{\mathrm{\&Delta;x}}(\frac{l_a}{R_L}+\frac{l_b}{R_u})\&bull;\frac{1}{6}\&bull;{\mathrm{\&sigma;}}_B\&bull;{\mathrm{<figure-callout\; id="2"\; label="t"\; filenames="A9980656800361.png"\; state="\{\{state\}\}">t</figure-callout>}}^2\&bull;w--\left(26\right)$

In the formula:

P ₀: the pressure of pinch roll

F: the tension force of band steel

Δ u: the displacement of the band steel that produces because of tension force F effect

Δ x: the vertical displacement amount of the pinch roll that produces because of the pressure P effect

M _B: the σ of the bending moment that band produces on the steel=(1/b) _BT ²W

σ _B: the yield stress of band steel

T: belt steel thickness

W: strip width

La: the length of band steel along the winding part of reeling along roller to bottom pinch roll

R _L: the radius of pinch roll

l _b: the winding part that the band steel is reeled along top pinch roll is along the length of roller

R _U: the radius of top pinch roll

Addendum modification Δ x, Δ u can calculate with the geometry method, the yield stress σ of band steel _BBe the value according to the material decision, the thickness t of band steel, width W decide according to handling material.Therefore, decide the tension force F that is with steel, can calculate only pressure P according to the rotating speed of devices for taking-up and the rotating speed of pinch roll.In this embodiment, the pressure that batches with pinch roll is set at above-mentioned (26) P that formula determined ₀More than the value.

Figure 12, Figure 13 be expression actual pressure figure, depress the oiling instruction figure of the hydraulic cylinder of pinch roll, and Figure 12 represents not carry out the situation that the pressure of this embodiment is set, and Figure 13 is a present embodiment.When be with steel behind the pinch roll whipping in advance, pressure drops to no load condition rapidly, and as shown in figure 12, hydraulic cylinder oiling instruction acts on the direction that keep-ups pressure, and makes pinch roll to sandwiching the direction action.Therefore, might produce the back row band steel bad phenomenon of nipping.Even do not producing under the situation of the bad phenomenon of nipping, back row band steel is in case the pinch roll of being nipped, pressure just returns to setting value after sharply rising, and hydraulic cylinder oiling instruction just makes pinch roll to opening the direction action, and variation can produce excessive action and cause vibration like this hastily.

And Figure 13 is after pressure is set, be with in advance steel from the pinch roll whipping after before back row band steel is nipped pinch roll, close servo valve so that the roll gap of pinch roll keeps certain, keep oiling, so hydraulic cylinder oiling instruction maintenance necessarily.Therefore, back row band steel can not produce the bad phenomenon of nipping.

The possibility of industrial application

As seen from the above description, the present invention can obtain following effect, can prevent from batching with folder Send the roller outlet side to produce in advance with the heap steel phenomenon of steel, also can prevent simultaneously the front end of rear row band steel Batching with pinch roll inlet side generation heap steel phenomenon.

Adopt in the situation of the present invention at the Hot Line that is provided with carrousel formula taking-up equipment, suppose the setting coiling speed V of above-mentioned reel_m, the above-mentioned target velocity V that batches with pinch roll during this cut-out_p, the rear row band steel after the above-mentioned firm cut-out plate speed V_sThe pass be V_m＞V _p＞V _s, this sets coiling speed V_mMean the logical band steel tail end that is batched with pinch roll on this reel that batches Cut off the setting coiling speed of above-mentioned reel afterwards by above-mentioned with the steel cutter, like this, just can Obtain following effect, can prevent from hanging over the reel that is positioned at towards batching the starting position with steel in advance Roll line and the locational guide plate of shunt towards the roll line of the reel that batches complete position Front end on.

The present invention is used in the situation on the general Hot Line, the 2nd of entrance side by being configured in the downstream reel batches uses pinch roll, with above-mentioned when having cut off the band steel tail end that batches on this downstream reel with the steel cutter, with the above-mentioned the 2nd target velocity V that batches with pinch roll_p1, be configured in the 1st of steel cutter outlet side and batch target velocity V with pinch roll_p2, the rear row band steel after the above-mentioned firm cut-out Target Board speed V_sAnd the setting coiling speed V of above-mentioned downstream reel_mRelation be made as V_m＞V _p1＞V _p2＞V _s, like this, can obtain the tail end that prevents in advance with steel and hang over three On the dihedral door and this effect with the steel breakage that causes.

In this case, after making the 1st bottom pinch roll skew of batching with pinch roll, until with cut off with the steel cutter by by the 2nd batch twisted in pinch roll on the reel of downstream with during the steel tail end, make the speed of bottom pinch roll than the fast V of the Target Board of rear row band steel_sLow, Under this state, by the 1st top pinch roll pressure zone steel that batches with pinch roll, until under pinch The torque actual value of roller reaches till the setting value that is predetermined, with at this moment pressure as skew The time top pinch roll to this setting pressure with steel, like this, just the available the 1st batch and use pinch roll Well clamping will be batched the band steel tail end on the reel of downstream, therefore, can obtain really This batches the effect of using the sliding phenomenon between the pinch roll with steel tail end and upstream side real elimination.

Cut off with the steel cutter with steel by be configured in batch with steel cutter outlet side above-mentioned batch continuously with pinch roll, by above-mentioned reel before, this is batched must be than usefulness P=F (Δ u/ Δ x)+2 (M with pressure setting of pinch roll_B/Δx){(l _a/r)+(l _b/ R) } The P value that formula determines is big, like this, can be only value with the pressure setting of top pinch roll, because of This can obtain the tail end generation that prevents Thin Strip Steel and break or thick leading with steel guiding devices for taking-up Effect to the phenomenon such as bad.

In this case, after the above-mentioned pressure setting, from be with the steel whipping in advance until rear row band steel Kept the above-mentioned roll gap that batches with pinch roll before nipping, just can obtain and prevent rear row band Steel is batched the effect with the phenomenon such as nipping of pinch roll be bad by nipping.

Before reel had been rolled up the band steel, the control of batching of this reel coiling band steel was turned to from torque control Become rotating speed control, hold-down roller is pressed on the band steel that is rolled into web-like then, make above-mentioned reel Stop revolution, or before above-mentioned reel is complete with strip coiling, to this reel coiling band steel Torque is controlled, and with the tension force of raising with steel, hold-down roller is pressed in coils into the band web-like then The band steel on, make above-mentioned reel stop the revolution, like this, can prevent from making because contacting with hold-down roller The roll coil of strip slows down, and can avoid the outer volume loose winding of the roll coil of strip or be the generation that turriform etc. is batched bad phenomenon, After strip coiling is complete, when stopping roll coil of strip revolution, because this hold-down roller has brake force, therefore, Can obtain and to make at short notice the roll coil of strip stop rotating effect.

After above-mentioned band steel cutter cut-out band steel, the front end of above-mentioned rear row band steel is nipped joins Put at this and batch when using pinch roll with steel cutter outlet side above-mentioned, batch with pinching above-mentioned The torque limit of the drive unit deceleration side of roller is set for and is made this batch all speed ratios of using pinch roll The transporting velocity of above-mentioned rear row band steel is fast, like this, even thicker with the thickness of slab of steel, rigidity is bigger, Also can obtain and prevent that rear row band steel is in the effect of batching with the entrance side heap steel of pinch roll.

Claims (11)

1. strip coiling method, the band steel of milling train being sent with band steel cutter cuts into specific length, batches by being configured in batching of above-mentioned band steel cutter outlet side with pinch roll and the reel that the utilizes devices for taking-up band steel after to cut-out,

It is characterized in that: will batch after the afterbody that twists in the band steel on the above-mentioned reel with pinch roll cuts off by above-mentioned with above-mentioned band steel cutter, above-mentioned transporting velocity of batching peripheral speed with the pinch roll back row band steel after than above-mentioned firm cut-out is fast, and slower than the coiling speed of batching above-mentioned band steel with above-mentioned reel.

2. strip coiling method as claimed in claim 1, it is characterized in that: above-mentioned reel is the reel of carrousel formula taking-up equipment, to batch after the tail end that twists in the band steel on the above-mentioned reel with pinch roll cuts off the setting coiling speed V of above-mentioned reel by above-mentioned with above-mentioned band steel cutter _m, the above-mentioned target velocity V that batches with pinch roll during this cut-out _p, the back row band steel after the above-mentioned firm cut-out plate speed V _sRelation be set at V _m＞V _p＞V _s

3. strip coiling method, the band steel of milling train being sent with band steel cutter cuts into specific length, batch with pinch roll and utilize the reel of upstream side devices for taking-up and the reel of downstream devices for taking-up alternately to batch by being configured in the 1st of above-mentioned band steel cutter outlet side

It is characterized in that: batching with pinch roll and batch after the tail end of the band steel on this downstream reel cuts off by being configured in the 2nd of downstream reel entrance side, the above-mentioned the 2nd batches the target velocity V of usefulness pinch roll with above-mentioned band steel cutter _P1, the above-mentioned the 1st target velocity V that batches with pinch roll _P2, the back row band steel after the above-mentioned firm cut-out Target Board speed V _sAnd the setting coiling speed V of above-mentioned downstream reel _mRelation set V for _m＞V _P1＞V _P2＞V _s

4. strip coiling method as claimed in claim 3, it is characterized in that: after the above-mentioned the 1st bottom pinch roll skew of batching with pinch roll, up to above-mentioned band steel cutter will by the above-mentioned the 2nd batch the afterbody that is batched the band steel on the reel of above-mentioned downstream with pinch roll before cutting off during this period of time in, set the speed of above-mentioned the 1st bottom pinch roll than the Target Board speed V of above-mentioned back row band steel _sLow, in this state, utilize the above-mentioned the 1st top pinch roll pressure zone steel that batches with pinch roll, till the actual torque of above-mentioned the 1st bottom pinch roll reached predefined setting value, top pinch roll was to the setting pressure of this band steel when to make at this moment pressure be above-mentioned skew.

5. as each the described strip coiling method among the claim 1-3, it is characterized in that: by be disposed at this band steel cutter outlet side above-mentioned batch the band steel that batches continuously with pinch roll, with above-mentioned reel after being cut off by above-mentioned band steel cutter before, this is batched pressure with pinch roll is set in more than the P value that following formula determines.

P=2F(Δu/Δx)+4(M _B/ΔX){(l _a/R _L)+(l _b/R _U)}

In the formula:

P: the pressure of pinch roll

F: the tension force of band steel

Δ u: the band steel displacement that produces because of tension force F

Δ x: the vertical displacement amount of the pinch roll that produces because of pressure P

M _B: bending moment=(1/6) σ that produces on the band steel _BT ²W

σ _B: the yield stress of band steel

T: belt steel thickness

W: strip width

L _a: the reel-up of band coil of strip on bottom pinch roll is along the length of roller

R _L: the radius of bottom pinch roll

L _b: the reel-up of band coil of strip on top pinch roll is along the length of roller

R _U: the radius of top pinch roll

6. strip coiling method as claimed in claim 5 is characterized in that: set after the above-mentioned pressure, from kept before the above-mentioned roll gap that batches with pinch roll with being with steel to be nipped to the back row behind the steel whipping in advance always.

7. as claim 1 or the described strip coiling method of claim 2, it is characterized in that: above-mentioned reel and above-mentioned batching with the velocity ratio of pinch roll in accelerator are that it is set relatively with above-mentioned reel and above-mentioned batching with the ratio of the final speed of pinch roll.

8. as each the described strip coiling method in the claim 1～7, it is characterized in that: before with above-mentioned reel strip coiling being finished, the control of batching the band steel by reel is changed into rotating speed control from torque control, hold-down roller is pressed on the band steel that is rolled into roll coil of strip shape then, makes above-mentioned reel stop revolution.

9. as each the described strip coiling method in the claim 1～7, it is characterized in that: before with above-mentioned reel strip coiling being finished, utilize of the torque control of this reel with steel, to improve the tension force of band steel, hold-down roller is pressed on the band steel that is rolled into roll coil of strip shape then, makes above-mentioned reel stop revolution.

10. as each the described strip coiling method in the claim 1～9, it is characterized in that: above-mentioned torque limit of batching with the drive unit deceleration side of pinch roll is to set like this, be that above-mentioned band steel cutter will be with after the steel cut-out, the front end of above-mentioned back row band steel is configured in batching when using pinch roll of this band steel cutter outlet side by nipping, this batches with the peripheral speed of pinch roll faster than the transporting velocity of above-mentioned back row band steel.

11. strip coiling method as claimed in claim 3 is characterized in that: it is above-mentioned downstream devices for taking-up and the above-mentioned the 2nd to be batched with the ratio of the target velocity of pinch roll set relatively that above-mentioned downstream devices for taking-up and the above-mentioned the 2nd batches with the velocity ratio of pinch roll in accelerator; The above-mentioned the 2nd batches that to batch with the velocity ratio of pinch roll in accelerator with pinch roll and the above-mentioned the 1st be to make the above-mentioned the 2nd to batch to batch with the ratio of the target velocity of pinch roll with pinch roll and the above-mentioned the 1st and set relatively.

Images