JP6025621B2 - Roll shape measuring method and roll shape measuring apparatus for roll press equipment used in roll press equipment - Google Patents

Description

  The present invention relates to a roll shape measuring method and roll shape measuring apparatus for roll press equipment used in roll press equipment for molding electrode materials and resins.

  Roll press equipment is used for compression processing of electrode materials for lithium ion secondary batteries. The required thickness accuracy after compression processing of materials is strict, for example, about ± 2 μm. In recent years, higher accuracy has been desired (± 1-2 μm). Therefore, in the work roll that performs the machining, high-precision finishing (cylindricity, roundness, runout) is performed in order to ensure machining accuracy.

  In addition, the shape of the work roll is deformed by the reaction force and thermal expansion from the material, and if no action is taken against this deformation, the processing accuracy of the material is deteriorated. Therefore, the work roll being processed is maintained with high accuracy. Thus, various devices (deflection correction mechanism, temperature equalization inside the roll) are performed. However, in the roll press facility, there is no example of actually measuring the shape of the work roll.

  In a rolling mill that rolls steel sheets and the like, the roll shape is measured online in order to grasp the roll wear amount associated with rolling and perform roll grinding (see, for example, Patent Documents 1 and 2). In Patent Document 1, the distance to the roll surface is measured before starting rolling after roll reassignment, the distance to the roll surface is measured after entering rolling, the measured values are compared, and the difference between the rolls is measured. A roll shape measuring method and apparatus for measuring the shape are described. In Patent Document 2, a roll shape detector and a reference position detector provided on a grindstone table arranged to be movable in parallel with the axial direction of a rotating roll and rolls in the circumferential direction of the roll surface and the roll axial direction with respect to the reference position. The shape is detected, and the roll shape in the roll axis direction at the same angular position in the roll circumferential direction, which is the detection result, is displayed as an image in the unfolded state of the roll surface according to the detection interval in the circumferential direction for one roll. It describes that the roll surface state is detected based on the image display result.

JP 59-10803 A JP 05-154516 A

  In the rolling mills described in Patent Documents 1 and 2, the roll shape is measured to grind the roll surface with a grindstone in order to flatten deformation of the roll surface due to roll wear. In Patent Document 2, it is also described that the roll shape in the circumferential direction of the roll surface is detected in order to grasp the size of the non-seizure generated on the roll surface, the peeling of the roll surface, and the generation position thereof. The shape is detected from the horizontal direction.

  On the other hand, in a roll press facility, for example, processing accuracy of about ± 2 μm is required, and not due to a large change in the roll surface due to roll wear in a rolling mill, but due to a change in shape due to the deflection of the roll or a thermal expansion of the roll. It is important to grasp the shape change. It is not possible to accurately grasp the roll shape change only by detecting such a roll shape change from the horizontal direction. By accurately grasping the shape change of the roll, it becomes possible to manage the work roll in the roll press facility with higher accuracy. Conventionally, in a roll press facility, it is not performed to grasp a shape change due to roll deflection or a shape change due to thermal expansion of the roll.

  The objective of this invention is providing the roll shape measuring method and roll shape measuring apparatus which can grasp | ascertain the shape change of the work roll used for roll press equipment more correctly.

  The present invention is characterized in that the roll deformation amount is grasped by dividing into deformation due to temperature change of the roll and deformation due to load on the roll.

  Also, in the case of roll press equipment that places rolls up and down and applies a load in the vertical direction, the roll shape is measured from two directions, the horizontal direction and the vertical direction, and deformation due to roll temperature change and deformation due to load on the roll The amount of roll deformation is grasped separately.

  Further, the roll deformation amount is obtained by comparing the measured value during operation of the roll press facility with the reference value at the time of starting the roll press facility or before the change of conditions.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to grasp | ascertain the shape change of the work roll used for roll press equipment more correctly, and the highly accurate management of the work roll in roll press equipment is attained.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a figure for demonstrating arrangement | positioning and the scanning direction of the measurement sensor for measuring a roll shape in the Example of this invention. It is a figure for demonstrating the method of calculating | requiring a roll deformation | transformation amount from the measured value of a roll shape in the Example of this invention. It is a figure which shows the structural example of the roll press machine main body in the roll press installation in which the roll shape measuring apparatus of this invention is used.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, an example of a roll press machine main body in a roll press facility to which the present invention is applied will be described with reference to FIG.

  The roll press machine main body in the roll press facility includes a bend mechanism that corrects the deflection of the roll. The main body of the roll press machine includes an upper roll (upper work roll) 1, a lower roll (lower work roll) 2, a main bearing box 4 that holds and holds a main bearing that pivotally supports the upper roll and the lower roll, and a main bearing of the lower roll. A press cylinder 5 is provided that applies a load to the box and generates a press load on the material (band material) 3 between the upper roll 1 and the lower roll 2. The main bearing box and press cylinder of the upper roll are supported by a housing (not shown). Each of the upper roll and the lower roll is provided with a roll drive mechanism (not shown). Further, the roll press machine main body is provided with a bend mechanism that corrects the deflection of the roll, which includes a bend cylinder 7 and a bend bearing box 6 that holds and holds the bend bearing.

  The press cylinder 5 is a main component of the press mechanism that adjusts the roll gap. The press cylinder 5 is configured to be position-controllable by a control command from a control panel (not shown). That is, the press cylinder has a position detector (not shown) such as a magnescale inside or outside, and a system capable of position control using a servo valve in the hydraulic system is employed.

  The bend cylinder 7 can be set with a pressing force by a control command from the control panel. The bend cylinder employs a proportional control valve (solenoid valve) for pressure setting. The bend bearing housing 6 is provided on both outer sides of the main bearing housing 4. The bend mechanism for correcting the deflection of the roll according to this embodiment is a bend tension type, and a bend cylinder 7 is provided between the bend bearing box of the upper roll and the bend bearing box of the lower roll, and the roll according to the processing load on the material. The deflection of the roll is corrected by applying a load to the roll in the opposite direction to the deflection. The arrows in the figure are images of the direction and magnitude of the load applied by each cylinder. Each cylinder uses hydraulic pressure. Hydraulic cylinders can handle high loads and can be processed stably by using incompressible fluid (hydraulic fluid).

  Although not shown in the figure, the roll press equipment is equipped with a pre-press coil in which a material such as a lithium ion secondary battery electrode material provided on the entrance side of the roll press machine body is wound in a coil shape in addition to the roll machine body. Measuring the thickness of the pressed material provided on the exit side of the unwinder and roll press machine main body, wound on the outlet side of the roll press machine body Thickness gauges are installed.

  Next, the configuration of the roll shape measuring apparatus in the present embodiment will be described with reference to FIG.

  First, the shape change that should be considered in a roll press facility that requires highly accurate roll management will be described.

(Roll shape change factor)
The shape change of the roll includes (1) shape change due to temperature change of the roll (thermal crown), and (2) shape change due to load on the roll (roll deflection).

(1) Shape change due to roll temperature change (thermal crown)
As a temperature change factor of the roll, there are a temperature change caused by heating the roll and a temperature change caused by heat transfer from the heat generated in the bearing to the roll.
The heating of the roll is performed by supplying a heating medium inside the roll when the pressing is performed while heating the material during the pressing. Such intentional heating causes a roll shape change.
Further, heat generation in the bearing is generated by internal friction due to rotation or agitation of grease, and heat is transferred to the roll side as the operation time of the roll press facility elapses.

(2) Shape change due to the load on the roll The load on the roll includes the roll's own weight, the press load to apply the applied pressure (processing force) to the material, and the reaction force received from the material at that time. It is. The roll bends due to its own weight, and also bends due to a reaction force received from the material when pressed onto the material.

  In this embodiment, such a roll shape change is measured by measuring the roll shape from two directions of the horizontal direction and the vertical direction, and based on these measured values, deformation due to temperature change of the roll (deformation due to thermal expansion) and The amount of deformation of the roll is ascertained by dividing into deformation due to the load on the roll (deformation due to deflection).

(Measurement sensor)
As the measurement sensor, an eddy current type, a laser type, a magnescale or the like is used, and the surface shape of the roll is measured by measuring the distance to the roll surface. Any method capable of measuring a change of 1 to several μm may be used, and the measurement method is not limited. The resolution of the measurement sensor is preferably about 0.1 μm or less.

  Laser measurement sensors include triangulation laser displacement sensors and coaxial confocal laser displacement sensors.

(Measurement sensor layout)
In the present embodiment, in order to measure the shape of the roll from two directions, the horizontal direction and the vertical direction, measurement sensors 10 and 11 are provided as shown in FIG. In FIG. 1, the right side is a side view of the roll, and the left side is a cross-sectional view of the roll.

  The measurement sensor 10 is installed on the Y axis of the roll in the roll cross section. The Y axis is also the direction of bending with respect to the roll load. In addition, when the load direction is vertical, the Y axis is also the vertical direction. In this embodiment, the load direction is the vertical direction. The measurement sensor 11 is installed on the horizontal X-axis of the roll cross section.

  The measurement sensors 10 and 11 measure while traveling in the Z-axis direction (roll width direction). In the measurement sensors 10 and 11, the measurement head travels on a travel frame (not shown). The traveling frame is made of a rigid body that does not deform. The traveling frame is attached to a housing (not shown) of the roll machine body. As a result, the measurement head is prevented from being displaced in the X-axis or Y-axis direction. And the measured value of the measurement sensors 10 and 11 is output with the position of a Z-axis direction. These measured values are transmitted to an arithmetic device (not shown) that incorporates a CPU and memory.

  When the vertical direction is as shown in the drawing, FIG. 1 shows the arrangement of the measurement sensors with respect to the upper roll 1. The arrangement of the measurement sensor with respect to the lower roll 2 is an arrangement configuration in which FIG.

(Measurement method)
The roll deformation amount is obtained by comparing the measured value measured during the operation of the roll press facility with the measured value measured at the time of starting the roll press facility or before the change of the condition. In this way, the amount of deformation compared to the reference value is difficult to configure a rail that travels in the width direction (Z-axis direction) straight, and when it is bent in the X-axis and Y-axis directions, This is because it is possible to more accurately measure the amount of change from the reference value (initial state). In this way, the deformation amount is obtained by comparing with the reference value, so that the rail can be easily processed and installed. Here, the condition change means a press load, a bend load (a load by the press cylinder 5 or the bend cylinder 7), a roll heating temperature (a temperature of the heating medium), a heat generation state of each part (bearing, etc.) by the press work, a material width. It means that any or all of (load width) etc. change. By using the measured values before these conditions change as a reference value, it is possible to more accurately grasp the influence on the deformation amount of the roll due to any or all of these conditions changing.

Hereinafter, the measurement method will be described in detail.
(1) The roll shape is measured at the time of starting the roll press facility or before changing the conditions (reference value measurement). This is to measure the roll shape at a reference temperature (room temperature or the like) and a load of only the roll's own weight, and the measured value at this time is used as a reference value.
(1-X) The measurement sensor 11 is run in the Z-axis direction, and the roll shape (distance from the sensor to the roll surface) in the X-axis direction (horizontal direction) is measured. The measurement range is from point A to point B as shown in FIG. This measurement range is the same as or wider than the width of the material 3. The measured value indicates the roll shape in the X-axis direction at a normal temperature and not affected by the press load or reaction force, and indicates a reference roll shape.
(1-Y) The measurement sensor 10 is run in the Z-axis direction, and the roll shape (the distance from the sensor to the roll surface) in the Y-axis direction (load direction) is measured. This measurement value similarly indicates the shape of the roll serving as a reference in the Y-axis direction.
(2) After the roll press facility is operated, the roll shape when the press load or reaction force is received is measured.
(2-X-1) The measurement sensor 11 is run in the Z-axis direction, and the roll shape (distance from the sensor to the roll surface) in the X-axis direction (horizontal direction) is measured.
(2-Y-1) The measurement sensor 10 is run in the Z-axis direction, and the roll shape (the distance from the sensor to the roll surface) in the Y-axis direction (load direction) is measured.
(2-X-2) Take the difference between the measured value of (2-X-1) and the measured value of (1-X). Since it is considered that there is no deformation due to a load in the X-axis direction, this difference is grasped as a shape change amount (deformation amount) due to thermal deformation (temperature change). For example, as shown in FIG. 3, a value obtained by subtracting the reference value from the measured value indicates the deformation amount described on the upper side.
(2-Y-2) Take the difference between the measured value of (2-Y-1) and the measured value of (1-Y). If there is no roll temperature change, this difference is grasped as a deformation amount (deflection) due to a press load or the like.
(2-Y-3) Take the difference between the measured value of (2-Y-2) and the value obtained in (2-X-2). This difference is grasped as a deformation amount (deflection) due to a press load or the like, from which the influence of deformation due to thermal deformation is removed when there is a roll temperature change.

  In this way, when the load direction is not the horizontal direction as in the vertical direction, the roll shape from the two directions of the horizontal direction and the load direction (vertical direction in the present embodiment) is measured, and these measured values are used. Thus, deformation due to thermal expansion and deflection deformation due to a press load can be grasped separately. Therefore, it is possible to accurately grasp the amount of roll deformation that could not be grasped conventionally, and it is possible to perform more accurate work roll management (for example, high precision roll processing considering roll deformation).

In the above-described embodiments, the case where the load direction is the vertical direction has been described, but the present invention can also be applied to the case where the load direction is the horizontal direction (a roll press facility in which a pair of rolls are horizontally arranged). In this case, the roll shape can be measured by installing a measurement sensor only on the X axis (horizontal direction). In this case, the X axis is also a direction of bending with respect to the load of the roll. A measurement method in this case will be described.
(1) The reference value measurement is performed as follows.
(1-X) The measurement sensor 11 is run in the Z-axis direction, and the roll shape (distance from the sensor to the roll surface) in the X-axis direction (horizontal direction) is measured. This measured value indicates the roll shape in the X-axis direction at normal temperature and is not affected by the press load or reaction force, and indicates the reference roll shape.
(2) The roll shape after the temperature change of the roll is measured.
(2-X-1) The measurement sensor 11 is run in the Z-axis direction, and the roll shape (distance from the sensor to the roll surface) in the X-axis direction (horizontal direction) is measured.
(2-X-2) Take the difference between the measured value of 2-X-1 and the measured value of 1-X. This difference indicates the amount of change in shape due to thermal deformation (temperature change).
(3) After the roll press facility is operated, the roll shape when the press load or reaction force is received is measured.
(3-X-1) The measurement sensor 11 is run in the Z-axis direction, and the roll shape (the distance from the sensor to the roll surface) in the X-axis direction (horizontal direction) is measured.
(3-X-2) Take the difference between the measured value of (3-X-1) and the value obtained in (2-X-2). This difference is grasped as a deformation amount (deflection) due to a press load or the like that eliminates the influence of deformation due to thermal deformation.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Upper roll, 2 ... Lower roll, 3 ... Material (electrode material etc.), 4 ... Main bearing box, 5 ... Press cylinder, 6 ... Bend bearing box, 7 ... Bend cylinder, 10, 11 ... Measurement sensor (distance meter) ).

Claims (4)

A roll shape measuring method used in a roll press facility equipped with a roll press machine body for compressing a band-shaped material,
The roll press machine main body is a roll press facility in which rolls are arranged up and down to apply a load in the vertical direction,
A roll used in a roll press facility characterized by measuring the roll shape from two directions, the horizontal direction and the vertical direction, and grasping the amount of roll deformation divided into deformation due to temperature change of the roll and deformation due to load on the roll. Shape measurement method. In the roll shape measuring method used for the roll press facility according to claim 1 ,
The roll deformation amount is obtained by comparing the measured value during operation of the roll press facility with the reference value, using the measured value at the start of the roll press facility or before the condition change as a reference value. A method for measuring the shape of a roll used in a press facility. A roll shape measuring device used in a roll press facility equipped with a roll press machine body for compressing a band-shaped material,
A first measurement sensor that measures the distance to the roll surface, which is arranged in the horizontal direction when viewed from the roll cross section of the roll press machine main body and can run in the roll width direction, and the roll cross section of the roll press machine main body. The second measurement sensor that measures the distance to the roll surface that is arranged in the load direction and can run in the roll width direction, and receives the output from the first measurement sensor and the second measurement sensor, and deforms the roll A roll shape measuring device for use in a roll press facility, comprising: an arithmetic device that calculates an amount by dividing the amount into deformation due to temperature change of the roll and deformation due to load on the roll. In the roll shape measuring apparatus for roll press equipment according to claim 3 ,
The arithmetic unit is a roll characterized in that a roll deformation amount is obtained by comparing a measured value during operation of the roll press facility with the reference value at a start time of the roll press facility or before a condition change. Roll shape measuring device for press equipment.

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