JPH0688171B2 - Automatic splitting of strip coil and automatic deceleration stop method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic splitting and automatic deceleration stopping method of a strip coil which is preferably used in a rolling process of a metal material.

Conventional technology A strip coil formed by rolling a metal material such as steel with a certain width is wound, and the formed strip coil is used as a base material. The strip coil, which is the base material, is specified in a temper rolling (skin pass) process, for example. When trying to make multiple strip coils by cutting into strip lengths, the above strip coil as the base material (hereinafter referred to as the base material coil) undergoes several steps before reaching the cutting work site. However, the total length and total weight of the base metal coil are unknown because the tip and tail ends are cut in the meantime.On the other hand, in the specifications supporting split cutting, the plate thickness and the strip coil formed after split are used. It is customary that the weight of (hereinafter referred to as the product coil) is specified. Therefore, at the site where the cutting work is performed, the strip thickness and strip width that form the base material coil and the length corresponding to the weight of the product coil required from the specific gravity of the material or the metal weight table, etc. are set. Indexing, on the other hand, the travel distance of the strip is calculated and set from the unwinding speed of the base material coil, and the rewinding operation of the base material coil is performed. At that time, the detection value is set while detecting the travel distance of the strip. When the value is reached, the strip travel is stopped and the cutting machine (shear) is used for cutting.

However, in such a method, a predetermined division length must be calculated each time, and if the division length is set to a small value, such as when the total length and total weight of the base material coil are unknown, the remaining material and Waste was generated, and if it was set to a large number, it became insufficient at the end of the base material, resulting in poor work efficiency. In addition, it required manpower for monitoring, which was a factor of cost up. Therefore, for example, the following method is used.

FIG. 7A is a diagram showing a strip (band plate) of the material to be cut. The strip 41 has a length L, a width B, and a plate thickness H.
If the unit width dB is taken in the width direction of the strip 41, the weight of this length L, width dB, and thickness H is expressed by W = L × H × dB × K (1) Here, K is the specific gravity of the strip 41, and in the case of steel, for example, K = 7.87 g / mm ³ . Now as unit width d
If B = 1 mm, the value of the weight W corresponds to the weight of the area (length L × thickness H), and Wm = H × L × K (2). The amount represented by this Wm is called "millimeter unit weight".

FIG. 7B is a diagram showing a base material coil of a material to be cross-sectioned. The strip 41 is wound around a payoff reel 42 having a diameter Do to form a base material coil 43 having a width B and an outer diameter Dpor. If the unit width dB = 1 mm is taken in the direction of the width B of the base material coil 43, the millimeter unit weight Wm of the base material coil 43 is Wm = (π / 4) (Dpor ² −Do ² ) · K (3) Represented by the outer diameter Dpor of the base material coil 43, the payoff reel 42
It is determined by the diameter Do and the specific gravity K of the strip 41 and has a value unrelated to the strip 41 plate thickness. Therefore, if the diameter Do of the payoff reel 42 is known, the value Wm of the base material coil 43 in millimeter unit weight can be easily known by measuring the outer diameter Dpor of the base material coil 43. By multiplying the value of the millimeter unit weight Wm by the base material coil width B (mm), the total weight Wtal of the base material coil 43 can be obtained. That is, the "millimeter unit weight" corresponds to the weight of one strip slice when the strip coil is sliced into a width of 1 mm.

If the weight of the product coil (not shown) required by the specifications is Ws, the value of Ws above is divided by the width B of the base material coil 43, Wdiv = Ws / B (4) is the product coil. This is referred to as the division millimeter unit weight Wdiv. This division millimeter unit weight Wdiv is the above-mentioned base material coil and 43 millimeter unit weight Wm
Equivalent to. Next, a conventional technique using this divided millimeter unit weight Wdiv will be described.

FIG. 8 is a diagram showing a conventional technique. On the cross-section side of the base material coil 43, the worker 44 holds the scale 45 and puts the end portion of the scale 45 labeled “reel” on the outer periphery of the payoff reel 42. As shown in FIG. 9, the scale 45 has a value "millimeter unit weight" engraved on one side and the other side,
For example, equidistant graduations are engraved, and on the other side, for example, equidistant graduations are engraved. One end of the scale 45 is marked with "coil" and the other end is marked with "reel". As a matter of course, the intervals between the graduated units of millimeter unit weight become narrower from the "reel" side toward the "coil" side. Worker 44
The value of the division unit weight Wdiv of the product coil obtained by the above equation 4 is applied to the cross section of the base material 43 using the conversion scale 45 and the 10th
As shown in the drawing, a mark 46 is attached to the cross section of the base material coil 43 with a yoke or the like. This mark is a cutting point that divides the base material coil 43 into equal parts.

FIG. 11 is a diagram showing a cutting step. The strip 41 forming the base material coil 43 is fed in the direction of the arrow x (left side in FIG. 11) by the crimping rotation of the mill 48, and the portion marked with the mark 46 follows the direction of the mill 48 accordingly. Move to. Operator
When the mark 46 passes between the mills 48 and reaches the position of the cutting machine 49 while monitoring the movement of the mark 46 attached to the strip 41, the 44 stops the mill 48 and sends out the strip 41. It is stopped and the cutting machine 49 is operated to cut the strip 41. Cut strip, first from cutting machine 49
The strip 51 on the left side of the drawing is taken up by a take-up reel (not shown), and is removed from the take-up reel when the take-up is completed,
A first product coil is created. Marks that appear in sequence below
For each 46, the worker 44 cuts the strip 41 with the cutting machine 49. In this manner, the product coil can be manufactured by introducing the amount of “millimeter unit weight” and dividing and cutting the base material coil 43 into a desired length by using a scale.

Problems to be Solved by the Invention However, the prior art method of marking the base metal coil using the "millimeter unit weight" and the scale is good when the strip thickness is thick, but when thin strips are used. Marks are attached to multiple layers. Therefore, when the thin plate is subjected to the cutting process, a plurality of marks appear at each cutting position, and it is difficult to know where the accurate division cutting point is. For this reason, there is a method in the specification that the allowable range is wide in advance and cutting is done at an appropriate mark position in the field, but when this is large, there is a waste of material equivalent to many turns of the coil in many cases. Occurrence, or vice versa. Workers are required to mark and monitor strip movements, which also impacts costs.

Therefore, an object of the present invention is to solve the above-mentioned problems, to determine the split point of the strip coil simply and accurately, and when the running strip reaches near the split point, automatically decelerate and then stop at the split point. And to provide a method of cutting into a predetermined length.

Means for Solving the Problems In the present invention, a strip 1 of a base material coil 3 wound around a payoff reel 2 having a diameter Do is wound around a pair of first tension rolls 4a, 4b and passed through a mill 7. Board, pass through the cutting machine 8 and wrap around a pair of second tension rolls 9a, 9b,
It is wound around the tension reel 10, and the payoff reel 2 and the tension roll 4a on the mill 7 side of the first tension rolls 4a and 4b have the first rotary shaft.
And the first and second pulse generators PG1 and PG2 are respectively mounted via the second reduction gears G1 and G2, and the outer diameter Dpor of the base material coil 3 is Where Pprs and Pers are the output pulse numbers of the first and second pulse generators PG1 and PG2, Grp and Gre are the reduction ratios of the first and second speed reducers G1 and G2, and Detr is the It is the outer diameter of the tension roll 4a on the mill 7 side, and the total millimeter unit weight Wtal of the mother coil 3, Wtal = Wlth + Wpor is calculated, where Wlth = Lth · H · K, where Lth is of the mother coil 3 The payout amount until the strip 1 is wound around the tension reel 10, H is the thickness of the strip 1, K is the specific gravity of the strip 1, and And the value Bn, Where Wdiv is Where Ws is the weight of the product coil and B is the width of the product coil. When Ws / B has a small remainder, Wdiv adopts the integer part, and when the remainder is large, Wdiv has a value obtained by adding 1 to the integer part. Adopted, and using the integer thus adopted as Bn, the product coil finishing millimeter unit weight Wfn, Then, the remaining millimeter unit weight Wzi of the base material coil 3, Wzi = Wtal−N · Wfn, is calculated, where N is the number of divisions and the product coil is 1
It is a value that increases by 1 each time individual pieces are formed.
Split residual length of Ldiv, On the other hand, on the other hand, the remaining length Lz of the base material coil 3, Where Lg is the deceleration stop correction length that the strip 1 travels until it stops after passing the deceleration speed Vj when traveling at the constant speed Vs, and when Lz = Ldiv + Lg is satisfied, the constant speed Vs Automatic decoupling and automatic strip coil characterized in that a deceleration stop command is issued from the running state, the strip 1 is cut by the cutting machine 8 at the time of stop, and then the strip is run again and the operation until stop cutting is repeated. This is a deceleration stop method.

Embodiment FIG. 1 is a diagram showing a mechanical structure of an embodiment of the present invention. At the start of the cutting work, various numerical values are initialized, which will be described later.

First, the tip of the strip 1 is pulled out from the base material coil 3, passes through the first tension rolls 4a, 4b in an inverted S shape, and moves in the direction indicated by the arrow x (left in FIG. 1). To do. Work rolls 5a, 5 sandwiching the strip I passage
b, a mill 7 formed of back-up rolls 6a, 6b is provided, and when the strip 1 is passed between the mills 7, the work roll 5a and the back-up roll 6a are pressed down, and the tip of the strip 1 Is pressed between the work rolls 5a and 5b. Then, in FIG. 1, a clockwise torque is applied to the payoff reel 2 and the first tension roll 4a, and the strip 1 between the base material coil 3 and the mill 7 is tensioned by the tension, and then the work roll 5a is pressed. When the work roll 5b is driven to rotate in the clockwise direction and in the counterclockwise direction, the tip of the strip 1 passes through the mill 7 to the left in FIG. 1, passes through the cutting machine 8, and passes through the second tension. Roll 9
The tension reel 10 is reached through an S-shape between a and 9b. Here, after winding the tip of the strip 1 around the tension reel 10, the mill 7 is stopped and the second tension roll
9a, a tension is applied to the tension roll 10 in the counterclockwise direction, and a torque is applied to the second tension roll 9b in the clockwise direction to tension the strip 1b between the mill 7 and the tension reel 10. For convenience of the following description, the base material coil 3 and the mill 7 will be referred to as "inlet side", the space between the mill 7 and the tension reel 10 will be referred to as "outlet side", and the first tension rolls 4a and 4b will be referred to as inlet side tension rolls. 4a, 4b and the second tension rolls 9a, 9b are referred to as exit side tension rolls 9a, 9b. While the mill 7 is in operation, a slight clockwise torque is applied to the payoff reel 2, and the exit side tension rolls 9a, 9b and tension reel 10 rotate so as to move the strip 1 in the direction of arrow x. Driven. As described above, the strip 1 is kept in a tension state on both the inlet side and the outlet side. After the strips on the inlet side and the outlet side are kept in a tensioned state, the mill 7 is rotationally driven, and at the same time, the predetermined torque is applied to the payoff reel 2, outlet side tension rolls 9a, 9b and tension reel 10 as described above. If the strip 1 is rotated while being applied, the strip 1 is continuously wound around the tension reel 10 and a product coil (not shown) is formed.

The pay-off reel 2 and the entrance-side tension roll 4a are provided with pulse generators PG1 and P on the rotating shafts via reduction gears G1 and G2, respectively.
G2 is attached to derive pulse signals S1 and S2 corresponding to respective rotation speeds N1 and N2. These pulse signals S1 and S2 are input to a control unit (not shown), and as will be described later, various values such as the outer diameter of the base material coil 3, the unit weight of millimeters, the travel distance of the strip 1 and the setting of division points are set. Used for calculation.

In the process in which the strip 1 is wound on the tension reel 10 and the product coil is formed, the traveling distance of the strip 1 is automatically determined by the pulse signals S1 and S2 corresponding to the traveling of the strip 1 as described later. When the calculated value becomes equal to the preset value, that is, the mill stops at the dividing point, the first product coil is completely wound up on the strip 1b and tension reel 10 on the left side of the cutting machine 8. Is formed. Next, the diameter of the tension reel 10 is reduced, and the product coil is removed from the tension reel 10 to complete the first product coil. Then, the mill 7 is driven to rotate again,
The tip of the strip 1 after cutting is wound around the tension reel 10 via the exit side tension rolls 9a and 9b, and the same operation as described above is performed. In this way, the base material coil 3
Then, the predetermined product coils are sequentially manufactured.

FIG. 2 is a block diagram showing the electrical construction of an embodiment of the present invention. Payoff reel 2 and entrance side tension roll
Pulse generators PG1 and PG2 are attached to the rotating shaft of 4a via speed reducers G1 and G2, respectively, and pulse signals S1 and S2 corresponding to the respective rotation speeds N1 and N2 are controlled via lines l1 and l2. Entered in 11.

The controller 11 is a control unit 11a realized by a microprocessor, an interface, etc., a setting unit 11b realized by a digital switch, and an LED (light emitting diode).
The display unit 11c is realized by a numeral display. The control unit 11a receives the pulse signals S1 and S2,
The setting unit 11b performs comparison, calculation, and determination based on preset numerical values, displays the result on the display unit 11c, and inputs a control signal to the power control unit 12 via the line l3. The electric power control unit 12 thereby applies the necessary electric power to the mechanical system such as the mill 7, the cutting machine 8 and the tension reel 10 via the line 16.

FIG. 3 is a front view of the controller 11. As described above, the controller 11 sets the initial conditions prior to the division and cutting work of the base material coil 3, and includes a plurality of digital switches,
The operation mode setting switch, LED (light emitting diode) number display, alarm buzzer, etc. are arranged. The individual switch operations and the like will be described in detail in the section of operation description below. In the present embodiment, the controller 11 has an integrated structure of the setting unit 11b and the display unit 11c, but in view of the current situation and operability, a part of the display unit and the operation panel should be housed in another case. May be. FIG. 4 is a time chart for explaining the operation of the embodiment of the present invention, in which the vertical axis represents the speed V of the strip 1 and the horizontal axis represents time t and time T. In the following description, it is assumed that the operation mode is set to "automatic". The work is started at time T0, and the payoff reel 2, entrance side tension rolls 4a, 4b, etc. are rotationally driven, and at time T1, the gradual speed Vj is reached. The tip of the strip 1 is pulled out from the base material coil and moves toward the mill 7 at a slow speed Vj. At the time T2, when the tip of the strip 1 reaches the immediate vicinity of the mill 7, the power supply to the entrance side tension roll 4a and the payoff reel 2 is cut off, and the time T3 is reached.
Stop at. At this time, the tip of the strip 1 is threaded up to the mill 7. The travel distance of the strip 1 at the time t1 between the times T0 and T3 is referred to as the strip passage length Le-p.
The strip 1 is stopped between time T3 and T4, and the strip 1 on the entrance side is tensioned during this period. At time T4, the mechanical system is driven again, pulse signals S1 and S2 are derived from the pulse generators PG1 and PG2 to the control unit 11a, and the control unit 11a starts calculation of the travel distance of the strip 1. The strip 1 moves at a slow-moving speed Vj, and stops at time T7 when its tip reaches the tension reel 10 after passing through the exit side tension rolls 9a and 9b. The control unit 11a calculates the travel distance of the strip 1 within the time t3 from time T4 to T7. Time T7 ~ T8
In the meantime, the tip of the strip is wound around the tension reel 10, and the strip 1a on the outlet side is strained. Above, time
The process between T0 and T7 is referred to as the payout of the strip 1, the travel distance of the strip 1 during this time is referred to as the payout amount Lth, and is calculated by the control unit 11a together with the amount of the strip length Le-p described above, Stored.

At time T8, the mill 7 moves slowly, and the control unit 11a starts calculation. The slow speed Vj is reached at time T9, and the surface inspection of the strip 1 is performed by the worker during the time t5 until time T10. At time T10, an acceleration command is issued from the control unit 11a, and the mill 7
The mechanical system such as is accelerated and reaches the constant speed Vs at time T11. After that, the vehicle continues traveling at a constant speed Vs, and the control unit 11a calculates the traveling distance of the strip 1 and the remaining length Lz of the base material coil 3.
The calculation method will be described later.

The strip running at the constant speed Vs starts decelerating according to the deceleration command, reaches the gradual speed Vj, and then stops according to the stop specification within the time (t8 + t9 + 10 + t11).
The distance Lg that the vehicle travels is calculated by the control unit 11a, and the time T
The sum of the traveled distance from 0 to T12 and the predicted distance Lg becomes equal to a preset value, and at time T12 the control unit 1
1a issues a deceleration command. Time t8 from time T12 to time T13
Is the delay time from when the command is received until the actual deceleration starts. At time T14, the same slow-moving speed Vj is reached, then a stop command is issued, a delay time t10 is reached, and a time t11 until the stop is reached. At time T16, the strip 1 is stopped. After that, as described above, a series of operations including cutting, winding, withdrawing the product coil from the tension reel 10 and the like are performed.
The product coil of is completed.

In this embodiment, it should be noted that the control unit 11a constantly measures and calculates the remaining length Lz of the base material coil 3 in measuring the traveling distance of the above-described strip 1 and the value Lz and the condition preset in advance. While comparing the value with the remaining length Ldiv of the base material coil 3 obtained from the value, when the difference between the two reaches a certain value, deceleration and then a stop command are issued. Although the calculation will be described later, the base material coil 3 is always cut at the correct division point.

The process after the time T17 is the manufacturing process of the second product coil, and the process is exactly the same as the process at the time T0 to T16. However, in the process after the second product coil,
The working time between times T1 and T7 in the manufacturing process of the first product coil is included between times T17 and T19, and is not shown.

FIG. 5 is a flow chart showing the operation of this embodiment.
The operation will be described below with reference to FIGS. 3 and 4 together.

In step n1, the controller 11 shown in FIG. 3 is used to set the operation mode and the initial value of the working condition as described below.

Setting of automatic operation Whether automatic or not is set by the automatic operation setting switch 32 of the controller 11.

Setting of the tail end stop of the base material coil 3 Whether the tail end stop of the base material coil 3 is stopped at the tail end or whether the base material coil 3 is wound up as it is, the tail end stop switch 33
To set.

Existence of division Whether to divide the base material coil 3 or not
Set with 34. In the case of no division, the base material coil 3 is not cut, and the entire strip is rolled by the mill 7.

Setting of the number of remaining turns T (turns) of the base material coil 3 The number of remaining turns T of the base material coil 3 is for maintaining the tension of the strip 1 to the end, and for the remaining winding part, that is, the tail end part of the base material coil 3 as a product. Inappropriate scratches and unevenness are often contained in order to remove these. The remaining winding number T set by the remaining winding number setting switch 21 is displayed on the remaining winding number display 22.

Setting the product coil division millimeter unit weight Wdiv (Kg / mm) The division millimeter unit weight Wdiv is the value obtained by dividing the product coil weight Ws (Kg) specified in the specifications by the product coil width B (mm). As described in the section of the prior art, in the specification, the upper limit Wsmax and the lower limit Wsmin are given to the weight Ws of the product coil, and the division millimeter unit weight Wdiv set here is the upper limit Wsmax.
Is set using Wdiv = Wsmax / B (5). This reduces the number of divisions,
This is to improve work efficiency.

Setting of the diameter Do (mm) of the payoff reel 2 It is set by the setting switch 24, and the set value is displayed on the display 25.

Setting the diameter Detr (mm) of the entrance side tension roll 4a It is set by the setting switch 28. Payoff reel 2 above
And the diameter Detr of the entrance side tension roll 4a are
Both are set in relation to the plate thickness H of the strip 1 which is the material to be cut.

Setting of the plate thickness H (mm) of the strip 1 It is set by the plate thickness H setting switch 26, and the set value is displayed on the display 27.

When the above setting is completed, the read switch 36 is pressed and the setting conditions are stored in the control unit 11a, and are used for performance calculation, comparison, judgment and the like in the subsequent steps.

In the step n2, the tip of the strip 1 is pulled out from the base material coil 3 and passes through the mill 7, and the tip is a tension reel.
In the strip 1 payout process wound around 10, the signals S1 and S2 shown in the first figure are input to the control section 11a by the rotation of the payoff reel 2 and the entrance side tension roll 4a, and step n3
The measurement of the payout amount Lth in is started. The measurement of the payout amount Lth at step n3 starts. When the tip end of the strip 1 is wound around the tension reel 10 at step n4 and the payout is completed, the payout amount Lth is calculated by the following equation.

Lth = (Pers / C · Gre) π · Detr + Le−p (6) where Pers is the number of pulses (pulse / 0.1 msec) included in the signal S2 shown in the first illustration, and C is a constant, in the case of the present embodiment. , For example C = 600. Gre is the reduction ratio of the reduction gear G2 shown in the first illustration, and Detr is the diameter (mm) of the entrance side tension roll 4a. The first term on the right side of the above equation indicates the running length between the entrance side tension roll 4a and the tension reel 10, and the second term Le-p is the thread length preceding it, which is a constant length if the error is ignored (this implementation In the example, Le-p = 2,500 mm). More steps n1
~ Step n4 is the time of the time chart shown in Fig. 4.
Corresponds between T0 and time T8.

In step n5, the mill 7 moves at a predetermined speed Vj (mm /
In step s), the gradual movement is started, and at the same time, in step n6, the calculation regarding the traveling of the strip 1 is started. After the gradual movement of the mill 7,
After a predetermined time has elapsed, the mill 7 is accelerated in step n7 according to the acceleration command from the controller 11a. The speed V (mm / s) is measured at step n8 and the speed is constant.
After reaching Vs (mm / s), the strip 1 runs at a constant speed Vs, is continuously sent from the inlet side to the outlet side, and is wound on the tension reel 10. During this time, the pulse generator PG1,
PG2 derives signals S1 and S2 corresponding to the number of rotations of the payoff reel 2 and the entrance side tension roll 4a, respectively, and in step n9, the following calculation is performed.

Calculation of outer diameter Dpor of base material coil 3 This is calculated by the following equation.

Dpor = (Pers / Pprs) · (Grp / Gre) · Detr (7) where Pprs and Pers are the number of pulses (pulses / 0.1ms) included in the signals S1 and S2, respectively, and Grp and Gre are decelerations, respectively. Machine G
Calculation of the total millimeter unit weight Wtal of the base material coil 3 which is the reduction ratio of 1, G2 This calculation is performed by the following equation.

Wtal = Wlth + Wpor (8) However, Wlth is a unit weight in millimeters of a portion corresponding to the payout amount Lth of the strip 1 obtained by the above equation 6, and is obtained by the following equation.

Wlth = Lth × H × K (9) Further, Wpor represents the unit weight of the base metal coil 3 after subtracting the amount Lth to be dispensed, and the outer diameter Dpor and the step of the base material coil 3 obtained by the formula 7 Using the value of the outer diameter Do of the payoff reel 2 set by n1, Wpor = (π / 4) (Dpor ² −Do ² ) ... (10) It should be noted in this embodiment that the total millimeter unit weight Wtal of the base material coil 3 can be simply and accurately obtained by the above calculation without using a scale or the like as in the prior art.

Determination of Division Number of Base Material Coil 3 When division of the base material coil 3 is set in advance in step n1, the division number Bn is calculated by the following equation.

Bn = Wtal / Wdiv (11) As a result of the above calculation, when the remainder is divisible and the remainder is less than 0.01, the value of Bn is used as it is, but when the remainder is 0.01 or more, 1 is added to the integer part of the quotient. The added value is calculated so as to be the division number Bn. As a concrete example, assume that the total millimeter unit weight Wtal of the base material coil 3 is 1500 (Kg / mm), and the value of the divided millimeter unit weight set in step n1 is 500 (Kg / mm).
Then, Bn = 3 is immediately calculated from the eleventh formula, and accordingly, the base material coil 3 may be divided into three. The finished millimeter unit weight Wfn per product coil obtained at this time is 1500/3 = 500
(Kg / mm). Also, the total millimeter unit weight Wtal of the base material coil 3
Is 1600 (Kg / mm), Bn = 1600/500 = 3.2, and therefore 4 obtained by adding 1 to the integer part of the quotient is taken as the division number Bn, and per product coil obtained by this Finishing millimeter unit weight Wfn is 1500/4 = 375 (Kg / mm). At this time, when the division number Bn is 3 and 4, the product unit coil is 125 (Kg / mm) in millimeter unit weight. However, the upper limit and the lower limit of the product coil weight Ws specified in the specifications are set as described above, and the division millimeter unit weight Wdiv value is set using the upper limit Wsmax. Therefore, the weight per product coil formed by dividing the base material coil 3 by using the division number Bn obtained by the above calculation of the division number is the allowable range set in the specification sheet. It fits inside. As a result of the calculation, the number of divisions Bn thus determined is the controller 11 shown in FIG.
The number of divisions is displayed on the display 30.

Calculation of finished product coil unit weight Wfn Using the division number Bn obtained above, the following formula is used.

Wfn = Wtal / Bn (12) The value of the obtained finishing millimeter unit weight Wfn is displayed on the finishing millimeter unit weight Wfn display 29 of the controller 11. The value of the finished millimeter unit weight Wfn indicates the actual millimeter unit weight of the product coil formed by dividing and cutting the base material coil 3. Therefore, each time one product coil is made, the remaining millimeter unit weight of the base material coil 3
Wzi will decrease by product unit weight Wfn.

Calculation of the remaining millimeter unit weight Wzi of the base material coil 3 Wzi = Wtal−N · Wfn (13) In the above formula, N indicates the number of divisions, starting from N = 1 and forming one product coil from the base material coil 3. Each time it is done, 1 is added.

Calculation of Division Remaining Length Ldiv of Base Material Coil 3 The division remaining length Ldiv of the base material coil 3 is calculated by the following equation from the value of the remaining millimeter unit weight Wzi obtained above.

Ldiv = Wzi / (H · K) (14) where H is the strip 1 thickness and K is the specific gravity. 14th
The division residual length Ldiv of the base material coil 3 obtained by the formula is
It is derived from the initial condition set by n1 in the calculation process of the first to fourteenth expressions. On the other hand, the outer diameter Dpor of the base material coil 3 is being reduced by the travel of the strip 1, and the remaining length Lz of the base material coil 3 at a certain time (for example, time Tx of the time chart shown in FIG. 4) is calculated by the following equation. To be done.

Lz = (π / 4H) ( Dpor 2 -Do 2) ... (15) H is the thickness of the strips 1, DPOR is determined by the outer diameter of the preform coil 3 Te cowpea seventh equation described above. Do is the diameter of the payoff reel 2 set at step n1 and is a constant value.
From the remaining length Lz of this base material coil 3, the running strip 1
Receives a deceleration command from the controller 1 and decelerates the travel distance Lg from deceleration to stop (the travel distance between times T12 and T16 in the case of the time chart shown in FIG. 4 as an example) (Lz-L
When g) becomes equal to the division remaining length Ldiv of the base material coil 3 obtained by the 14th equation, that is, when Lz = Ldiv + Lg (16) holds, decelerating and then issuing a stop command from the controller 11 Therefore, the point where the strip 1 is stopped is the division point. This Lg is called the deceleration stop correction length and is calculated by the following formula.

Lg = Vs · ta + [( Vs 2 -Vj 2) / 2α 1] + Vj · tb + (Vj 2/2
α ₂ ) (17) Where Vs is the current speed (constant speed), Vj is the slow speed, α ₁ ,
α ₂ is the deceleration rate, ta is the delay time from when the control unit 11a issues the deceleration command until the mill 7 actually starts deceleration, for example, the time t8 on the time chart shown in FIG. 4 or the time.
It is equal to t16, and in this embodiment, ta = 0.5 seconds, for example.
Similarly, tb is the delay time from when a stop command is issued to when the stop operation is started, which is also the time on the time chart in Fig. 4.
Equal to t10 or time t18.

FIG. 6 is a time chart from deceleration to stop. FIG. 6 shows times T12 to T16 of the time chart shown in FIG.
It is the same as the time chart between. The description of the 17th equation will be added below with reference to FIG. While the strip 1 is traveling at the constant speed Vs, a deceleration command is issued at time T12 and the actual deceleration operation is started at time T13. The delay time is indicated by ta. After deceleration, the slow speed Vj is reached at time T14. The control unit 11a detects the slow speed Vj and immediately issues a stop command. After the delay time tb has elapsed, at time T15, the deceleration operation for stopping is started, and at time T16
Stop at.

The distance traveled by the strip 1 between the times T12 and T16 is Lg, which is the polygon abcdefgh formed by the polygonal line P.
It can be represented by the area A of i. Therefore, rectangle Q from time T12 to T13
The area A of 1 is A1 = Vs · ta (18) Next, the area A of the trapezoid Q2 between times T13 and T14 is A2 = [(Vs + Vj) · tc] × 1/2 (19) On the other hand, The deceleration rate α ₁ between times T13 and T14 changes from Vs to Vj during the time tc, and if the rate of change is constant, α ₁ = (Vs-Vj) / tc (20) ∴tc = (Vs−Vj) / α _{1 When} this is put into the 19th formula, A2 = [(Vs−Vj) (Vs + Vj) 2α ₁ ] = (Vs ² −Vj ² ) / 2α ₁ (21) Also, from time T14 to The area A of the rectangle Q3 between T15 is A3 = Vj · tb (22) Finally, the area A4 of the triangle Q4 between time T15 and T16 is A4 = (Vj · tb) × 1/2 If α ₂ is set, α ₂ = (Vj−0) / td ∴td = Vj) / α ₂ , so A4 = Vj ² / 2α ₂ (23) After all, Lg = A = A1 + A2 + A3 + A4, 18,, 21,2
Adding Equations 2 and 23 makes it equal to Equation 17.

Referring again to FIG. 5, at steps n10 and n11, the operation mode is determined, that is, whether the operation mode is automatic or not, and whether or not the base material coil 3 is divided. The operating mode is step n1 first
If it is already set with, and if it is automatic, proceed to step n11,
Next, if there is division, the process proceeds to step n12.

In step n12, the remaining length Lz of the base material coil 3 and the divided remaining length Ldi
A comparison between v and the sum of the deceleration stop correction length Lg is calculated, and if the above-mentioned equation 16 is satisfied, it is judged as a deceleration point, a deceleration command is issued at step n13, and deceleration is made up to the slow speed Vj at step n14. It is judged whether or not it reaches the slowing speed Vj and the control unit
11 issues a stop command, and at step n15, the delay time t
Decelerate for a time equivalent to b and decelerate to stop correction length at step n16
If it is judged that it is running for Lg and it is judged as a stop point,
Stop at step n17.

The strip 1 is cut at step n18, and the cut strip 1b is formed at the product coil at step n19.
Of the data stored in the control unit 11a, 1 is added to the number of divisions N calculated and set by the equation 13. In step n20, the number of divisions Bn set by the equation (11) in step n9 is compared with the above-mentioned number of times N. If Bn> N, the operation is returned to step n2 to continue the operation. Also
In the case of Bn = N, that is, in the final round, the process proceeds to step n21, the mill 7 moves slowly, then is accelerated in step n22 and reaches the constant speed Vj in step n23. Further, the control unit 11a calculates the coil remaining length Lz of the base material coil 3 according to the expression (15). In step n24, the remaining winding length Lest is calculated by the following equation, Lset = π (Do + H · T) (24) according to the number of remaining windings T that was initialized in advance in step n1, and this Lest is the tail end stop described later. Is the length of the strip 1 remaining on the payoff reel 2 side after the final strip 1 is cut off. Using the above Lset and Lz, the calculation by the following equation is continuously performed to determine the final cut point of the strip 1.

Lz = Lg + Lset (25) That is, the deceleration point is when the sum of the deceleration stop correction length Lg and the remaining winding length Lset becomes equal to the coil remaining length Lz. Step n25
Then, the above equation is used for determination, and if the equation is satisfied, the control unit 11a issues a deceleration command for the mill 7. The mill 7 starts decelerating and reaches the slowing speed Vj at step n27. In step n28, it is judged whether or not the tail end stop of the base material coil 3 is set, and if the tail end stop is not set, step n3
3 The work is stopped manually at the end. If set, proceed to step n29, and after confirming that the vehicle has traveled for the deceleration stop correction length Lg, the mill 7 is stopped at step n30, the final cutting of strip 1 is performed at step n31, and the final cutting is performed at step n32. The product coil is formed and the work is completed.

Effects As described above, according to the present invention, a means for accurately measuring the number of revolutions of the payoff reel around which the base material coil is wound and the entrance side tension roll is provided, and the pulse signal obtained from this means and one-millimeter unit By positively utilizing the amount, even for strip coils whose total weight, total length, etc. are unknown, first accurately calculate and calculate the outer diameter of the strip coil, and then calculate the total weight from the "millimeter unit" value. The travel distance of the strip and the weight of the travel are calculated from the pulse signal corresponding to the rotation speed of the tension roll, and the remaining amount of the base material coil and the weight of the travel are constantly compared to meet the preset conditions. Since the split cutting point is automatically calculated based on the above, unlike the conventional technique of setting the split cutting point according to the mesh size, the split cutting point can be accurately and easily determined. It is possible to make a product coil with excellent uniformity. According to the present invention, automatic deceleration and automatic stop are realized, and it is possible to realize the automatic split cutting and automatic deceleration and stop method of the strip coil, which is remarkably improved in work efficiency in combination with labor saving.

[Brief description of drawings]

FIG. 1 is a diagram showing a mechanical structure of an embodiment of the present invention, and FIG.
FIG. 3 is a diagram showing an electrical configuration of this embodiment, FIG. 3 is a front view of a controller, FIG. 4 is a time chart showing the operation of this embodiment, FIG. 5 is a flow chart, and FIG. Fig. 7A is a perspective view of the strip, Fig. 7B is a perspective view of the strip coil, Fig. 8 is a diagram showing the prior art, Fig. 9 is a plan view of the scale, and Fig. 10 is FIG. 11 is a diagram showing a conventional technique, and FIG. 11 is a diagram showing a work according to the conventional technique. 1,41 …… Strip, 2,42 …… Pay-off reel, 3,43…
… Strip coil (base material), 4a, 47 …… Entrance side tension roll, 7,48 …… Mill, 8,49 …… Cutting machine, 9a, 9b…
… Exit side tension rolls, 10… tension reels,
11 ... Controller, G1, G2 ... Reducer, PG1, PG2 ... Pulse generator

Claims (1)

[Claims] 1. A strip 1 of a base material coil 3 wound around a payoff reel 2 having a diameter Do is wound around a pair of first tension rolls 4a, 4b, passed through a mill 7, and a cutting machine 8 is provided.
Passing through the roll and wound around the pair of second tension rolls 9a and 9b and wound around the tension reel 10, and on the rotary shaft of the payoff reel 2 and the tension roll 4a on the mill 7 side of the first tension rolls 4a and 4b. Is the first
And the first and second pulse generators PG1 and PG2 are respectively mounted via the second reduction gears G1 and G2, and the outer diameter Dpor of the base material coil 3 is Where Pprs and Pers are the output pulse numbers of the first and second pulse generators PG1 and PG2, Grp and Gre are the reduction ratios of the first and second speed reducers G1 and G2, and Detr is the It is the outer diameter of the tension roll 4a on the mill 7 side, and calculates the total millimeter unit weight Wtal of the base material coil 3, Wtal = Wlth + Wpor, where Wlth = Lth · H · K, where Lth is the base material coil 3 Of the strip 1 to be wound around the tension reel 10, H is the thickness of the strip 1, K is the specific gravity of the strip 1, and And the value Bn, Where Wdiv is Where Ws is the weight of the product coil and B is the width of the product coil. When Ws / B has a small remainder, Wdiv adopts the integer part, and when the remainder is large, Wdiv has a value obtained by adding 1 to the integer part. Adopted, and using the integer thus adopted as Bn, the product coil finishing millimeter unit weight Wfn, Then, the remaining millimeter unit weight Wzi of the base material coil 3, Wzi = Wtal−N · Wfn, is calculated, where N is the number of divisions and the product coil is 1
It is a value that increases by 1 each time individual pieces are formed.
Split residual length of Ldiv, On the other hand, on the other hand, the remaining length Lz of the base material coil 3, Where Lg is the deceleration stop correction length that the strip 1 travels until it stops after passing the deceleration speed Vj when traveling at the constant speed Vs, and when Lz = Ldiv + Lg is satisfied, the constant speed Vs Automatic decoupling and automatic strip coil characterized in that a deceleration stop command is issued from the running state, the strip 1 is cut by the cutting machine 8 at the time of stop, and then the strip is run again and the operation until stop cutting is repeated. Deceleration stop method.