JP2013223871A - Roll device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll device which can make the thickness of a processed object after processing constant.SOLUTION: A roll device includes: a first rolling roller 121 and a second rolling roller 122; pressing means 14A, B which depress first bearing portions 131A, B to second bearing portions 132A, B in a direction of coming close mutually; third bearing portions 161A, B which support rotatably a first supporting shaft 111 on the outside of the first bearing portions 131A, B; fourth bearing portions 162A, B which support rotatably a second supporting shaft 112 on the outside of the second bearing portions 132, being arranged axially in the same position as the third bearing portions 161A, B; deflection compensating means 17A, B which set apart the third bearing portions 131A, B and the fourth bearing portions 162A, B by the later described deflection compensation load; load measuring means 15A, B which measure the load of a processed object S sandwiched between the first rolling roller 121 and the second rolling roller 122; and a control means 18 which finds the deflection compensation load based on the load of the processed object S, and controls the deflection compensating means 17A, B based on the deflection compensation load.

Description

  The present invention relates to a roll device that can be suitably used for, for example, pressing an electrode of a lithium ion secondary battery.

Lithium ion secondary batteries are used as small-sized and large-capacity (long-duration) power sources in various portable devices such as mobile phones, smartphones, tablet terminals, notebook computers, and digital cameras. Lithium ion secondary batteries generally have a positive electrode in which a positive active material made of a lithium compound such as LiCoO ₂ or LiMn ₂ O ₄ is supported on a plate-like current collector made of a metal such as aluminum, and a negative active material made of graphite or the like. It has a configuration in which a non-aqueous electrolyte is disposed between negative electrodes in which a substance is supported on a plate-like current collector made of a metal such as nickel.

  When producing a positive electrode and a negative electrode, a positive and negative active material is adhered to a plate-like current collector, and the active material is reliably supported on the current collector by rolling (rolling) while heating. A hot press process is performed. Patent Document 1 describes a roll apparatus for performing such hot press processing.

  The roll apparatus described in Patent Document 1 is a pair of rollers that are arranged in parallel to each other and roll with a workpiece (a plate-like current collector attached with an active material) interposed therebetween, A first pressure roller having a first support shaft on both sides and a second pressure roller provided on the upper side of the first pressure roller and having a second support shaft on both sides are provided. In addition, the roll device includes a pair of first bearing portions that rotatably support the first support shaft, a pair of second bearing portions that rotatably support the second support shaft, and a second bearing portion. A support mechanism that supports the first bearing portion from below is provided so as to be freely contacted and separated. The roll device further supports a pair of third bearing portions that rotatably support the first support shaft outside the first bearing portion, and supports the second support shaft rotatably outside the second bearing portion. A pair of fourth bearing portions, and a deflection compensation mechanism that biases the third bearing portion and the fourth bearing portion in a direction in which they are separated from each other. The reason why such a deflection compensation mechanism is used will be described below.

  When rolling the workpiece, a load is applied to the workpiece from the first rolling roller and the second rolling roller, and as a reaction, a reaction force from the workpiece is applied to the first rolling roller and the second rolling roller. Applied to the rolling roller. Thereby, the 1st pressure roller and the 2nd pressure roller bend so that the direction of a central part may estrange rather than both ends. On the other hand, the first bearing roller and the second roller are urged in the first support roller by urging the third bearing portion and the fourth bearing portion in the direction of separating them from each other by the deflection compensation mechanism. Through the shaft and the second support shaft, a force is applied to bring the center portion close to each other, and compensation is made so that the deflection is canceled. By compensating for the deflection in this way, the thickness of the workpiece can be made uniform in the width direction.

Japanese Patent Laid-Open No. 11-260356

  The amount of bending varies depending on the magnitude of the load applied to the rolling roller, the material and shape of the rolling roller and the support shaft, the material and thickness of the workpiece, and the like. In the apparatus described in Patent Document 1, for example, when the material of the workpiece is different, the reaction force from the workpiece is different, and the amount of deflection is fluctuated. Therefore, if the force applied to the third bearing portion and the fourth bearing portion by the deflection correction mechanism remains as it is, the deflection cannot be quantitatively compensated, and the thickness in the width direction of the workpiece after pressing becomes non-uniform. . Moreover, the same problem also occurs when a workpiece having a constant thickness in the conveyance direction is pressed before pressing, and the deflection cannot be quantitatively compensated.

  The problem to be solved by the present invention is that the thickness of the workpiece after processing is constant even when the applied load fluctuates for some reason or the thickness of the workpiece is not constant before pressing. It is providing the roll apparatus which can do.

The roll device according to the present invention made to solve the above problems is as follows.
a) a first rolling roller and a second rolling roller that are arranged in parallel to each other and roll with the workpiece sandwiched therebetween;
b) A pair of first bearing portions provided on both sides of the first pressure roller and supporting a first support shaft, which serves as a rotation shaft of the first pressure roller, so as to be rotatable on both sides of the first pressure roller. When,
c) A pair of bearing portions that support the second rotation shaft, which is the rotation shaft of the second pressure roller, on both sides of the second pressure roller, one of which is axially aligned with one of the first bearing portions. A second bearing portion disposed at the same position as the other of the first bearing portions and at the same position in the axial direction;
d) a pressing means for pressing the first bearing portion and the second bearing portion in a direction in which they approach each other;
e) a pair of third bearing portions that rotatably support the first rotating shaft outside the pair of first bearing portions;
f) A pair of bearing portions that rotatably support the second rotating shaft outside the pair of second bearing portions, one of which is disposed at the same axial position as one of the third bearing portions. A fourth bearing portion, the other of which is disposed at the same position in the axial direction as the other of the third bearing portion,
g) A pair of deflection compensation means for separating the one third bearing portion and the one fourth bearing portion, and the other third bearing portion and the other fourth bearing portion by a deflection compensation load described later. When,
h) a pressing load measuring means for measuring a pressing load by which the pressing means presses the first bearing portion and the second bearing portion;
i) obtaining a deflection compensation load based on the pressing load, and controlling the deflection compensation means based on the deflection compensation load;
It is characterized by providing.

  In the roll device according to the present invention, when a workpiece is introduced between the first roller and the second roller, a load is applied from the first roller and the second roller, and the reaction thereof As a result, a reaction force (hereinafter referred to as “workpiece reaction force”) acting so as to be separated from each other acts on the first roller and the second roller. On the other hand, the first bearing portion and the second bearing portion outside the first rolling roller and the second rolling roller are pressed so as to approach each other by the pressing means. For this reason, the first roller and the second roller are separated from each other by the workpiece reaction force at the center, and are bent toward each other by the pressing means at both ends. Therefore, in the roll device according to the present invention, the workpiece reaction force is the same as the load applied by the pressing means and in the opposite direction (law of action / reaction), as described below. The bending of the pressure roller and the second pressure roller is quantitatively compensated.

  First, the load measuring means measures the load by which the pressing means presses the first bearing portion and the second bearing portion (the magnitude of this load is the same as the workpiece reaction force, and hereinafter referred to as “pressing load”). To do). The control means obtains a deflection compensation load based on the pressing load and applies the deflection compensation load to the third bearing portion and the fourth bearing portion to separate the third bearing portion and the fourth bearing portion from each other. To control. With this deflection correction load, the first roller and the second roller try to bend so as to approach each other at the center and to separate from each other at both ends. In this way, since the deflection due to the pressing load and the workpiece reaction force and the deflection due to the deflection compensation load are in opposite directions, both the deflections are canceled by the principle of superposition. As described above, by applying the deflection correction load obtained based on the pressing load to the third bearing portion and the fourth bearing portion, quantitative compensation of the deflection is realized.

  When the control means obtains the deflection compensation load, the deflection amount of the first roller and the second roller according to the pressing load (workpiece reaction force) is calculated from the value of the pressing load by a theoretical formula, and the bending is performed. Based on the quantity, a method of obtaining the deflection compensation load from another theoretical formula can be adopted. Alternatively, a correspondence table between the pressing load and the deflection compensation load may be created in advance, and the deflection compensation load may be obtained from the measured pressing load based on the correspondence table.

When the control means calculates the deflection amount and the deflection compensation load from the value of the pressing load, for example, the following simplified theoretical formula can be used. In this example, as shown in FIG. 1 (a), the distance between a pair of first bearing portions (left first bearing portion 93A, right first bearing portion 93B) provided on both sides of the first rolling roller. distance of L, L ₁ the distance of the end portion SA of the workpiece S closer to it and the left first bearing portion 93A, the end portion SB of the workpiece S closer to it and right first bearing portions 93B Is L ₂ , and the width of the workpiece S in the width direction (the same direction as the axial direction) is L ₃ (thus, L = L ₁ + L ₂ + L ₃ ). Further, the distance between each of the left first bearing portion 93A and the right first bearing portion 93B and the third bearing portion closer to the first bearing portion (the left third bearing portion 96A and the right third bearing portion 96B) also with L _4. The workpiece reaction force (the pressure load and the magnitude is the same) is set to W _0, and the load is uniformly distributed over L ₃ . Further, E is the Young's modulus that integrates the first rolling roller and the first spindle, and I is the secondary moment of section. The Young's modulus E and the secondary moment of section I are values determined by the materials and shapes of the first rolling roller and the first support shaft.

ただし、L₁≦x≦(L₁+ L₃)である。
ここで、簡略化のためにL₁＝L₂≡L_sとすると、L₁+(L₃/2)＝L₂+(L₃/2)＝(L/2)となり、上式は以下の式(1)に変形される。

なお、第２転圧ローラと第２支軸も、第１のそれらと同一の大きさの被加工物反力を逆方向に受けるので、第２転圧ローラの撓み方向は逆であるが撓み量は式(1)と同一となる。 Under such conditions, the amount of deflection y of the first pressure roller when the workpiece is introduced between the first pressure roller and the second pressure roller without performing deflection compensation is the first pressure roller. When the x axis is the rotation axis and the origin is the left first bearing portion 93A, the maximum deflection is obtained by the following equation, and is zero at x = L / 2 and zero at x = 0 and L.

However, L ₁ ≦ x ≦ (L ₁ + L ₃ ).
Here, when L ₁ = L ₂ ≡L _s for _{simplification, L 1 + (L 3/} 2) = L 2 + (L 3/2) = (L / 2) , and the above equation is less This is transformed into equation (1).

The second roller and the second spindle also receive the workpiece reaction force having the same magnitude as the first roller in the opposite direction, so the second roller is bent in the opposite direction. The amount is the same as in equation (1).

なお、ここではL₁=L₂=≡L_sとして(1)及び(2)式を求めたが、L₁とL₂が多少異なっていてもよい。実用上、十分に撓みを補正するためには、L₁及びL₂は、L₃（すなわち被加工物の幅）の±5％の範囲内とすることが望ましく、L₃の±2％の範囲内とすることがより望ましい。
また、以上では、転圧ローラ・回転軸のヤング率E、断面２次モーメントI等を幅方向に一様として近似し、撓み補償荷重W₁も左右で同一と仮定しているが、実際にはさらに複雑化が必要な場合もある。このような場合には経験式や実験データ等で、式(1)や式(2)の増減調整を行えばよい。 Next, the maximum deflection is compensated as follows. First, when a load that separates the third bearing portion and the fourth bearing portion from a pair of deflection compensation means is applied, a deflection in the opposite direction to that in the case of no compensation is generated, and the deflection is reduced as a whole by the principle of superposition. . Therefore, in order to cancel the maximum deflection according to the formula (1), a deflection compensation load W ₁ that causes the same deflection as the maximum deflection is applied from the deflection compensation means in the direction of separating the third bearing portion and the fourth bearing portion. That's fine. As shown in FIG. 1B, the deflection compensation load W ₁ can be solved by using a relational expression (2) between the load W ₁ and the deflection y in a so-called “both-side protruding beam” structure. That is, in the case of FIG. 1B in which the deflection compensation load W ₁ is applied so that the third bearing portion and the fourth bearing portion are separated from each other, the deflection compensation load W ₁ and the deflection y have the relationship of Expression (2). Therefore, if the maximum deflection y (x = L / 2) obtained by substituting x = L / 2 in Equation (1) is substituted for y in Equation (2), the deflection compensation load W that causes the maximum deflection is obtained. ₁ can be sought.

In this example, Equations (1) and (2) are obtained with L ₁ = L ₂ = ≡L _s , but L ₁ and L ₂ may be slightly different. In practice, in order to compensate sufficiently deflection, L ₁ and L _2, L ₃ (i.e. the width of the workpiece) is desirably in the range of ± 5% of the L ₃ ± 2% of It is more desirable to be within the range.
In the above, the Young's modulus E and the secondary moment of inertia I of the rolling roller / rotating shaft are approximated to be uniform in the width direction, and the deflection compensation load W ₁ is assumed to be the same on the left and right. May require further complications. In such a case, the increase / decrease adjustment of the formula (1) or the formula (2) may be performed using an empirical formula or experimental data.

  The roll device according to the present invention further includes a thickness distribution measuring unit that measures a thickness distribution of the workpiece before and / or after the processing, and the control unit is configured to control the third of the one according to the thickness distribution. Deflection compensation so that the deflection compensation load applied to the bearing portion and the one fourth bearing portion and the deflection compensation load applied to the other third bearing portion and the other fourth bearing portion are controlled independently. The means may be feedforward controlled and / or feedback controlled. According to this configuration, the thickness distribution of the workpiece can be reduced by independently controlling the deflection compensation load applied to the third bearing portion and the fourth bearing portion from the pair of deflection compensation means. The thickness distribution of the workpiece may be measured over the width of the workpiece, but it is practically sufficient to use the thickness at both ends, or the measured thickness at the center in addition to those ends. .

  According to the present invention, in order to compensate for the deflection of the first roller and the second roller according to the pressing load measured by the load measuring means, when the pressing load has fluctuated for some reason, Even when the thickness of the workpiece is not constant before pressing, it is possible to provide a roll device that can make the thickness of the workpiece after processing constant.

The schematic diagram (a) for explaining the formula (1) for calculating the maximum deflection in the roll device according to the present invention, and the schematic diagram (b) for explaining the formula (2) for calculating the deflection compensation load. The schematic front view which shows 1st Example of the roll apparatus which concerns on this invention. The left side view showing the left 3rd bearing part in the 1st example, the left 4th bearing part, and the actuator for left compensation. The graph which shows thickness distribution by the position of the width direction in the workpiece after a process calculated | required in Experiment 1. FIG. The graph which shows thickness distribution by the position of the width direction in the to-be-processed workpiece calculated | required in Experiment 2. FIG. The graph which shows thickness distribution by the position of the width direction in the to-be-processed workpiece calculated | required in Experiment 3. FIG. The schematic (left view) which shows 2nd Example of the roll apparatus which concerns on this invention. Schematic which shows the modification of 2nd Example (left view).

  The Example of the roll apparatus based on this invention is described using FIGS.

(a) Configuration of Roll Device of First Example The configuration of the roll device 10 of the first example will be described with reference to FIGS. 2 and 3. The roll device 10 of this embodiment includes a first pressure roller 121, a first support shaft 111 that is a rotation shaft of the first pressure roller 121, a second pressure roller 122, and a second pressure roller 122. It has the 2nd spindle 112 which is a rotating shaft. The first rolling roller 121 and the second rolling roller 122 are for rolling with a plate-shaped workpiece S (for example, an electrode material of a lithium ion secondary battery) sandwiched between them. It arrange | positions so that it may mutually oppose with the rolling roller 121 as a lower side. The first support shaft 111 and the second support shaft 112 are connected to a motor via gears, a clutch, and the like (not shown) so as to rotate in the opposite directions at the same rotational speed. Further, the first rolling roller 121 and / or the second rolling roller 122 includes a heater for heating the workpiece S (not shown).

  The roll device 10 includes a first bearing portion 131, a second bearing portion 132, a main actuator 141, a second bearing portion support portion 142, a jack device 143, a load meter 15, a third bearing portion 161, and a fourth bearing portion. One 162 and one compensation actuator 17 are provided on both sides of the first roller 121 and / or the second roller 122, respectively. In FIG. 2, for each of these components, “A” is added to the end of the sign on the left side of the first and / or second pressure roller 121 and 122, and the sign on the right side is designated with “A”. Is shown with “B” appended to the end. For example, in the first bearing portion 131, a symbol “131 </ b> A” is attached to a component on the left side of the first rolling roller 121, and a symbol “131 </ b> B” is attached to a component on the right side. Hereinafter, each of these components will be described.

  The first bearing portion 131 is provided on both end sides of the first support shaft 111, and the second bearing portion 132 is provided on both end sides of the second support shaft 112, and these shafts are rotatably supported. . The 1st bearing part 131 and the 2nd bearing part 132 are arrange | positioned so that it may oppose up and down at the same position in an axial direction.

  The main actuator 141 is an actuator that is provided below the first bearing portion 131 and pushes up the first bearing portion 131 with hydraulic pressure. The main actuator 141 is fixed to the base 21 that is the base of the roll apparatus 10. The second bearing portion support portion 142 is fixed to the frame 22 erected on the base 21 and supports (fixes) the second bearing portion 132 from above. Similarly to the second bearing portion support portion 142, the frame 22 is also provided with a pair of left and right (two). The first rolling roller 121 is pressed upward by the first bearing portion 131 being pushed up by the main actuator 141, whereas the second rolling roller 122 is supported by the second bearing portion 132 by the second bearing portion. Since it is fixed by the portion 142, it does not move up and down. Thereby, a load is applied to the workpiece S between the first rolling roller 121 and the second rolling roller 122. Thus, the pressing means 14 that applies a load to the workpiece S is configured by combining the main actuator 141 and the second bearing portion support portion 142.

  The jack device 143 is provided between the first bearing portion 131 and the main actuator 141, and by changing the height of the first bearing portion 131, the first roller roller 121 and the second roller roller 122. This is for adjusting the interval.

  The load meter 15 is provided between the first bearing portion 131 and the jack device 143 and corresponds to the load measuring means.

  The third bearing portion 161 is a bearing that rotatably supports the first support shaft 111, and is disposed outside the first bearing portion 131. The fourth bearing portion 162 is a bearing that rotatably supports the second support shaft 112, and is disposed outside the second bearing portion 132. The third bearing portion 161 and the fourth bearing portion 162 are arranged at the same position in the axial direction so as to face each other in the vertical direction.

  The compensation actuator 17 is provided between the third bearing portion 161 and the fourth bearing portion 162, and corresponds to the deflection compensation means. The compensation actuator 17 is an actuator that acts in a direction in which the third bearing portion 161 and the fourth bearing portion 162 are separated from each other. As shown in a side view of FIG. It is a hydraulic type in which one pair (two pieces) is attached to the front and rear with respect to the conveyance direction of the object.

  In addition, the roll apparatus 10 of the present embodiment includes a control unit 18. The control unit 18 includes an input unit that inputs data signals of loads from the left and right load cells 15, a deflection compensation load determination unit that determines a deflection compensation load based on load values obtained by the left and right load cells 15, and a determination. An output unit is provided for outputting a control signal to the compensation actuator 17 based on the deflection compensation load.

(b) Operation of the roll apparatus of the first embodiment The operation of the roll apparatus 10 of the first embodiment will be described. First, as preparation before pressing work, the first rolling pressure is set by the jack device 143 so that the gap between the first rolling pressure roller 121 and the second rolling pressure roller 122 is larger than the thickness of the workpiece S before processing. The roller 121 is moved. Then, the values of the left and right load meters 15A and 15B at this time are offset to 0 (zero). By this operation, the reaction force when the workpiece S is sandwiched between the rollers, that is, the load by which the main actuator presses the rollers, can be measured from the load value measured by the load meter 15.

  Next, the main actuator 17 sets the gap between the first pressure roller 121 and the second pressure roller 122 to a predetermined value smaller than the thickness of the workpiece S. Then, while heating the first pressure roller 121 and / or the second pressure roller 122 with a heater, the first pressure roller 121 and the second pressure roller 122 are rotated in the opposite directions at the same rotational speed, The workpiece S is introduced into the gap between the first pressure roller 121 and the second pressure roller 122, and the pressing means 14, that is, the fixed second bearing portion 142 and the first bearing portion 131 that can be moved by the main actuator 17. A load is applied to the workpiece S by the pressing means 14. At this time, since the first rolling roller 121 and the second rolling roller 122 receive a reaction force in the separating direction from the workpiece S, the maximum deflection is caused at the center of the both rolling rollers, and the deflection is exerted on the outer side. It becomes smaller gradually. In this state, since the size of the gap between the first rolling roller 121 and the second rolling roller 122 varies depending on the position in the width direction, the thickness of the workpiece S after processing becomes uneven.

  Therefore, the load pressing the workpiece S is measured by the left and right load meters 15A and 15B, and the measurement data is input to the input unit of the control unit 18. The control unit 18 adds the measurement data of these two loads to obtain a load applied by the pressing unit (the reaction force and the magnitude from the workpiece are the same), and calculates the maximum deflection based on the load. Determine the deflection compensation load. As a method for determining the maximum deflection and the deflection compensation load, a load applied by the pressing portion and a deflection compensation load corresponding to the load are obtained by a preliminary experiment, a table in which the load is recorded, a predetermined calculation formula (for example, the above-described formula) Based on the equations (1) and (2)), there is a method of obtaining the maximum deflection from the load applied by the pressing means and then calculating the deflection compensation load. The control unit 18 controls the compensation actuator 17 based on the calculated deflection compensation load.

  As a result, the compensation actuator 17 applies a deflection compensation load to the third bearing portion 161 and the fourth bearing portion 162 to compensate for the deflection of the first pressure roller 121 and the second pressure roller 122. That is, the third bearing portion 161 and the fourth bearing portion 162 are applied with a load in a direction away from each other, so that the first roller 121 and the second roller 122 have both ends closer to each other than the center. Try to bend in the direction of separation. The deflection due to the deflection compensation load and the deflection due to the load applied by the pressing means described above are superimposed, so that the deflection of the first rolling roller 121 and the second rolling roller 122 can be eliminated. Thereby, since the size of the gap between the first rolling roller 121 and the second rolling roller 122 becomes constant, the uniformity of the thickness of the workpiece S after processing is increased.

(c) Experimental Result Hereinafter, the result of the experiment in which the deflection of the first pressure roller 121 and the second pressure roller 122 is compensated using the roll device 10 of the first embodiment will be described. The first rolling roller 121 and the second rolling roller 122 of the roll device 10 used in this experiment both have a diameter of 400 mm and a width of 770 mm. In each experiment, the center of the workpiece in the width direction is as close as possible to the center of the first roller 121 and the second roller 122 in the width direction, that is, the distance L shown in FIG. ₁ and the distance L ₂ were made as close as possible.

(c-1) Experiment 1
In Experiment 1, an olefin film having a width before processing of 465 mm and an average thickness of 465 μm was used as an object to be processed.
First, without operating the compensation actuator 17 and the control unit 18 (hereinafter referred to as “no deflection compensation”), the pressing load W ₀ is 120 kN (the left and right load meters 15A and 15B are 60 kN, respectively). Was detected). When the thickness of the workpiece after processing was measured, the result that it was the thickest at the center in the width direction was obtained (FIG. 4). As described above, this reflects that the center in the width direction is bent by the pressing load so that the first roller 230 and the second roller 122 are separated from each other. The thickness is distributed in the range of 131 to 138 μm (distribution width: 7 μm) in the width direction.

Next, the compensation actuator 17 and the control unit 18 were operated (with deflection compensation), and the pressing load W ₀ was set to 120 kN as in the case without deflection compensation. The deflection compensation load W ₁ was applied by 160 kN from the left compensation actuator 17A and the right compensation actuator 17B. When the thickness of the workpiece after processing was measured, the distribution in the width direction was in the range of 135 to 138 μm (distribution width: 3 μm) (FIG. 4). As described above, it was confirmed that the thickness distribution width can be made smaller by performing the deflection compensation than when the compensation is not performed.

(c-2) Experiment 2
In Experiment 2, an experiment was performed using a positive electrode material having a width before processing of 346 mm and an average thickness of 261 μm as a workpiece.
First, the processing was carried out with a pressing load W ₀ of 127 kN and with deflection compensation. Deflection compensation load W ₁ each from the left of the compensation actuator 17A and the right side of the compensation actuator 17B is applied by 650KN. As a result, the thickness distribution in the width direction of the workpiece was in the range of 208 to 212 μm (distribution width 4 μm), but the center was thinner than both ends in the width direction (FIG. 5). This is because an unnecessarily large deflection compensation load is applied.

Therefore, the setting of the control unit 18 is changed so as to weaken the deflection compensation load. When the deflection compensation load is weakened, the workpiece after processing becomes thicker. Accordingly, the main actuator 141 is adjusted to increase the pressing load. In this way, when the machining was performed under the condition that the pressing load W ₀ was 137 kN and the deflection compensation load W ₁ was applied 455 kN from the left and right compensation actuators 17A and 17B, the thickness distribution in the width direction of the workpiece was 202. It was ˜203 μm (distribution width 1 μm), the distribution width was smaller than that before adjustment, and the absolute value of the thickness after processing could be within a predetermined allowable range.

(c-3) Experiment 3
In Experiment 3, an experiment was performed using an electrode material having a width before processing of 450 mm, an average thickness of 252 μm, and the same material as that of Experiment 2 as a workpiece.
This experiment was performed under three conditions: the pressing load W ₀ was 450 kN, and the deflection compensation load W ₁ was (i) 0 (no deflection compensation), (ii) 280 kN, and (iii) 400 kN. As a result, the thickness distribution in the width direction of the workpiece is 175 to 183 μm (distribution width 8 μm) in (i), 177 to 182 μm (distribution width 5 μm) in (ii), and 179 to 182 μm (distribution in (iii)). The width of thickness distribution was reduced in the order of (i) to (iii).

  As in Experiments 2 and 3, many experiments for obtaining conditions for reducing the thickness distribution width in the width direction of the workpiece are performed, and the results are reflected in the control by the control unit 18 to improve the processing accuracy. be able to.

  The roll apparatus of 2nd Example is demonstrated using FIG.7 and FIG.8. As shown in the schematic diagram (side view) of FIG. 7, the roll device 30 of the second embodiment is obtained by adding a thickness distribution measuring device 31 to the roll device 10 of the first embodiment. The thickness distribution measuring device 31 continuously measures the thickness distribution in the width direction while introducing a strip-shaped sample in the length direction. The thickness distribution measuring device 31 is located downstream of the first rolling roller 121 and the second rolling roller 122 in the conveying direction of the workpiece S so as to measure the thickness distribution of the workpiece S after processing. Has been placed.

  Moreover, the roll apparatus 30 has a control unit 18A instead of the control unit 18 in the roll apparatus 10 of the first embodiment. The control unit 18A determines the deflection compensation load based on the input unit for inputting the load data signal from the left and right load cells 15 and the thickness distribution data signal from the thickness distribution measuring device 31, and the pressing load and the thickness distribution. A deflection compensation load determination unit and an output unit that outputs a control signal to the compensation actuator 17 based on the determined deflection compensation load.

Operation | movement of the roll apparatus 30 of 2nd Example is demonstrated.
For rolling the workpiece S, the first roller 121 and / or the first roller 122 are heated by a heater, and the first roller 121 and the second roller 122 are rotated in the same direction in the opposite directions. The workpiece S is rotated at a speed, the workpiece S is introduced into the gap between the first rolling roller 121 and the second rolling roller 122, and a pressing load is applied to the surface of the workpiece S by the pressing means 14. The rolled workpiece S is introduced into the thickness distribution measuring device 31, and the thickness distribution in the width direction is measured.

  The control unit 18A obtains a deflection compensation load based on the pressing load measured by the load meter 15, and controls the compensation actuator 17 based on the obtained deflection compensation load. And control part 18A acquires the data signal of the thickness distribution which thickness distribution measuring device 31 measured from the input part at any time. Here, if the processed workpiece S is thicker at the center than at both ends, the deflection compensation load is insufficient. If the center is thinner than both ends, the deflection compensation load is excessive. It is. Therefore, the control unit 18A corrects the deflection compensation load based on the thickness distribution data, and feedback-controls the compensation actuator 17 based on the corrected deflection compensation load. Thereby, the difference of the thickness of a both-ends part and a center part can be made small.

  In addition, when the workpiece S before processing has a thickness distribution that the other end is thicker than one end, the same thickness distribution occurs in the processed workpiece S. There are many. When such thickness distribution data is obtained from the thickness distribution measuring device 31, the control unit 18A has a workpiece after processing among the compensating actuators 17A and 17B provided in a pair in the width direction. The deflection compensation load applied from the compensation actuator provided on the end portion side where S is thick is reduced, and the deflection compensation load applied from the compensation actuator on the opposite side is increased. Thereby, the edge part side where the workpiece S is thick is pressed more strongly, and thickness distribution can be made small.

  In the roll device 30 described above, the deflection compensation load is feedback controlled by measuring the thickness of the workpiece S after processing. However, when the thickness distribution of the workpiece S before processing becomes a problem, FIG. The thickness distribution measuring device 31 is arranged on the upstream side in the conveying direction of the workpiece S with respect to the first rolling roller 121 and the second rolling roller 122, as in the roll device 30A shown in FIG. The deflection compensation load may be feedforward controlled based on the thickness distribution of S. In addition, the roll device 30A is provided with a second thickness distribution measuring device 32 that measures the thickness distribution of the workpiece S after processing. In the example shown in FIG. 8, the second thickness distribution measuring device 32 is provided to check the thickness distribution of the workpiece S after processing without normally correcting the deflection compensation load based on the measurement result. ing. However, feedback control of the deflection compensation load may be further performed using the measurement result of the second thickness distribution measuring device 32.

DESCRIPTION OF SYMBOLS 10, 30, 30A ... Roll apparatus 111 ... 1st spindle 112 ... 2nd spindle 121 ... 1st rolling roller 122 ... 2nd rolling roller 131 ... 1st bearing part 132 ... 2nd bearing part 14 ... Pressing means 141 ... main actuator 142 ... second bearing portion support portion 143 ... jack device 15 ... load meter (load measuring means)
161 ... third bearing portion 162 ... fourth bearing portion 17 ... actuator for compensation (deflection compensation means)
18 ... Control unit 21 ... Base 22 ... Frames 31, 32 ... Thickness distribution measuring device 93A ... Left first bearing portion 93B ... Right first bearing portion 96A ... Left third bearing portion 96B ... Right third bearing portion

Claims (4)

a) a first rolling roller and a second rolling roller that are arranged in parallel to each other and roll with the workpiece sandwiched therebetween;
b) A pair of first bearing portions provided on both sides of the first pressure roller and supporting a first support shaft, which serves as a rotation shaft of the first pressure roller, so as to be rotatable on both sides of the first pressure roller. When,
c) A pair of bearing portions that support the second rotation shaft, which is the rotation shaft of the second pressure roller, on both sides of the second pressure roller, one of which is axially aligned with one of the first bearing portions. A second bearing portion disposed at the same position as the other of the first bearing portions and at the same position in the axial direction;
d) a pressing means for pressing the first bearing portion and the second bearing portion in a direction in which they approach each other;
e) a pair of third bearing portions that rotatably support the first rotating shaft outside the pair of first bearing portions;
f) A pair of bearing portions that rotatably support the second rotating shaft outside the pair of second bearing portions, one of which is disposed at the same axial position as one of the third bearing portions. A fourth bearing portion, the other of which is disposed at the same position in the axial direction as the other of the third bearing portion,
g) A pair of deflection compensation means for separating the one third bearing portion and the one fourth bearing portion, and the other third bearing portion and the other fourth bearing portion by a deflection compensation load described later. When,
h) a pressing load measuring means for measuring a pressing load by which the pressing means presses the first bearing portion and the second bearing portion;
i) obtaining a deflection compensation load based on the pressing load, and controlling the deflection compensation means based on the deflection compensation load;
A roll apparatus comprising:   2. The roll according to claim 1, wherein the control unit obtains a deflection amount of the workpiece based on a load applied to the workpiece, and obtains the deflection compensation load based on the deflection amount. apparatus. The distance between the pair of first bearing portions is L, the distance between one first bearing portion and the end of the workpiece closer to the first bearing portion, and the other first bearing portion and the first. The distance from the end of the workpiece closer to the bearing portion is L _s , the width of the workpiece is L ₃ , and each of the pair of first bearing portions and the first bearing portion closer to the first bearing portion. 3 The distance of the bearing portion is L ₄ , the uniformly distributed load over L ₃ of the workpiece is W ₀ , the deflection compensation load is W ₁ , and the first roller and the first support shaft are integrated. E is the Young's modulus and I is the moment of inertia
The maximum deflection y _max of the first support shaft is _expressed by equation (1).

(However, L _s ≤ x ≤ (L _s + L ₃ ))
And substituting x = L / 2 to obtain the deflection compensation load W _{1 according} to equation (2)

The roll device according to claim 2, wherein the maximum deflection y = y _max is substituted into the roll device. Furthermore, it comprises a thickness distribution measuring means for measuring the thickness distribution of the workpiece before and / or after processing,
The control means applies a deflection compensation load applied to the one third bearing portion and the one fourth bearing portion according to a thickness distribution, and the other third bearing portion and the other fourth bearing portion. The roll device according to any one of claims 1 to 3, wherein the deflection compensation means is feedforward controlled and / or feedback controlled so as to independently control the deflection compensation load to be applied.

Images