Rewinder with diameter distribution measurement system and diameter distribution measurement method

Abstract

The invention relates to a rewinder with a diameter distribution measuring system and a diameter distribution measuring method, the rewinder (10) being a rewinder of a slitting rewinder and configured to rewind customer reels (15) into groups of customer reels, the rewinder comprising two rewinding cylinders (11, 12) and a pressure roller (17) supported by a pressure roller beam (18), the customer reels being configured to be rewound on a support of the rewinding cylinders, the pressure roller being configured to support the customer reels from above during the rewinding of the customer reels, and the pressure roller and the pressure roller beam being arranged to be movable in a vertical direction. The pressure roller beam comprises a linear guide on its longitudinal side, the diameter distribution measuring system comprising a diameter distribution measuring device (20) supported by a carriage (22), the measuring device being movably supported on the linear guide by the carriage, the diameter distribution measuring device comprising a measuring laser sensor rotatably attached to the carriage by a rotatable attachment for a calibration measurement of the measuring laser sensor.

Description

Technical Field

[0001] This invention generally relates to the production of fiber webs and the slitting and rewinding of fiber webs into customer rolls, particularly by means of a slitting and rewinding machine for fiber webs. The invention relates to a rewinding machine with a diameter profile measurement system, and a method for measuring the diameter profile. Background Technology

[0002] As is well known, fiber webs (such as paper or paperboard webs) are manufactured in production lines consisting of multiple machines that can be hundreds of meters long. Modern paper machines can produce more than 450,000 tons of paper per year. The speed of paper machines can exceed 2000 m / min, and the width of the paper web can be greater than 11 meters.

[0003] As is known from the prior art, fiber web production processes typically comprise a set of components formed by multiple pieces of equipment arranged sequentially in a production line. A typical production and processing line includes a headbox, a wire section, and a press section, followed by a drying section and a winding or rewinding machine. The production and processing line may also include finishing equipment such as sizing machines and / or calenders and / or coating machines. The production and processing line typically also includes at least one slitting and rewinding machine for forming customer rolls, as well as roll packaging equipment.

[0004] In a fiber web production line, manufacturing operates as a continuous process. Finished fiber webs output from the machines are wound around a winding spool (i.e., a reel) using a winding machine or rewinder to form master rolls (machine rolls). These master rolls can have a diameter greater than 5 meters and a weight exceeding 160 tons. The purpose of winding is to transform the fiber webs from their planar manufacturing form into a more easily handled form. At the winding machine located in the main production line, the continuous process is first interrupted, after which the process continues in stages. Various attempts are made to interconnect these stages as smoothly as possible so that no work already performed is wasted. Therefore, winding machines are used in fiber web production to wind fiber webs from the fiber web production line into master rolls; however, winding machines are also used to wind fiber webs from coating machines, calenders, or corresponding finishing devices.

[0005] In a paper reel, the fiber web wound onto the master roll is full width, and therefore must be cut longitudinally into partial webs of suitable width. These partial webs are then wound into partial fiber web rolls (customer rolls) with suitable fiber web lengths and / or suitable diameters for the customer. As known in the art, slitting and winding are performed in a suitable separate machine, i.e., in a slitting and rewinding machine. A slitting and rewinding machine includes: an unwinder in which the master roll is unwound; a slitting section in which the fiber web unwound from the master roll is slit (i.e., cut longitudinally) into partial webs of desired widths; and a rewinding section for rewinding the customer rolls. Different types of rewinding devices are employed in the rewinding section of the slitting and rewinding machine, such as multistation rewinders and two-drum rewinders. As is known in the prior art, when winding fiber webs into customer rolls on a slitting and rewinding machine, rewinding can be performed using either a coreless shaft or a shaft with a core. In a multi-station rewinding machine type slitting and rewinding machine, the fiber web is guided from the unwinding point via guide rollers to a slitting section, where the fiber web is slit into partial webs. These partial webs are further guided from above or below to one or more rewinding rollers at a rewinding station to be rewound onto a core to form a customer roll. Adjacent partial webs are rewound onto different sides of the rewinding rollers / rewound onto different rewinding rollers. A multi-station rewinding machine has one to three rewinding rollers, and each partial web is rewound into a partial web roll in its own rewinding station on these rewinding rollers. During rewinding, a rewinding pressure zone is formed between the rewinding rollers and the partial web roll to be rewound. In a twin-roll rewinder, a portion of the web is rewound into a customer roll via a pressure zone between the rewinding roll and the customer roll being formed, around a rewinding core supported by two rewinding rolls. In a twin-roll rewinder, a belt assembly (i.e., a so-called set of belt rollers) can also be used as the rewinding roll, the belt assembly having one or more belt loops positioned around two guide rollers. During rewinding, a rewinding pressure zone is formed between the rewinding roll and the customer roll being rewound. In a twin-roll rewinder, a rider roll is typically also used to support the customer roll being rewound from above. The rider roll is supported by a rider roll beam, which is arranged to be generally movable in the vertical direction to contact the customer roll during rewinding, and moves upward accordingly as the diameter of the customer roll increases.

[0006] As is known from the prior art, in a slitting and rewinding machine, the master roll is unwound in the unwinding section of at least one unwinder, and the full-width fiber web is slit longitudinally into several narrower partial fiber webs (partial webs) in the slitting section. These partial fiber webs are then rewound around a rewinding core in the rewinding section to form a group of customer rolls. In the slitting and rewinding machine, when the customer roll reaches the desired length and diameter, a group change is performed, wherein the pressure rollers are released from contact with the customer roll, and the partial webs are cut in the cross-direction. During the group change, the tail of the partial web (i.e., the tail end of the cut partial web) is attached to the surface of the fiber web on the surface of the customer roll by applying an adhesive to the surface of the fiber web traveling toward the customer roll. When a customer roll is completed, in the slitting and rewinding machine, during group change, the complete customer roll (i.e., the so-called group) is removed from the rewinder, and a new core for rewinding the next group of customer rolls is placed on the rewinding machine, onto the support of the rewinding cylinder, and the starting end of the cut web portion is attached to the new core. The pressure roller is moved to support the customer roll to be rewound, and then the process of rewinding the next group of customer rolls continues. These stages are repeated periodically until the paper in the unwinder's master roll is used up, thus performing a master roll change, and the operation begins again as the next master roll is unwound and forms a group of customer rolls.

[0007] One crucial factor affecting the operational performance of a slitting rewinder is the diameter distribution of the customer rolls in a group. Sometimes, the transverse distribution of the full-width fiber web produced by a fiber web production line is such that, during rewinding of the grouped customer rolls, the diameters of the customer rolls differ, sometimes significantly. This results in the group of customer rolls not fully contacting the pressure rollers of the twin-roll rewinder, and customer rolls with different diameters also have different angular velocities. This can cause severe vibration. Vibration can cause problems in the rewinder; even a 1mm difference in customer roll diameter can cause vibration and / or affect the rewinder's operational performance. Vibration leads to winding rejects, mechanical wear on slitting rewinder parts and components, even loosening of customer rolls from the rewinder, and reduced rewinding capacity when travel speeds must be reduced. Therefore, vibration typically limits the maximum usable speed during rewinding and thus reduces the slitting rewinder's capacity. In the worst case, vibration can cause the group of customer rolls to be ejected from the rewinder. In addition, due to vibration, the web may break.

[0008] It is known from the prior art that hardness measurements are sometimes used to define the diameter distribution of a group of customer rolls because there is a correlation between the hardness and diameter distribution of the group of customer rolls. An example of this type of device is disclosed in WO patent application publication 2010028867A1. In practice, this device is rarely used due to its relatively high cost.

[0009] FI Utility Model Publication 13651Y1 discloses a slitting and rewinding machine, which includes: a slitting section for slitting the fiber web into partial webs in the longitudinal direction; a spreading device for separating the partial webs in the lateral direction, thereby creating a distance between adjacent partial webs; and a rewinding section for rewinding the partial webs into customer rolls, the rewinding section including at least one rewinding roller for supporting and rewinding the customer rolls during rewinding by means of a winding pressure zone formed between the rewinding roller and the customer rolls. The slitting and rewinding machine further includes: one or more traversable measuring devices located after the spreading device in the direction of travel of the partial webs for measuring the distance between adjacent partial webs and / or the gap between adjacent customer rolls; one or more spreading adjustment actuators for adjusting the spreading / separation effect of the spreading device; and a controller configured to receive one or more measurement results from the one or more traversable measuring devices and automatically control the one or more spreading adjustment actuators. One or more measuring devices for measuring the gap between customer rolls can be attached to the pressure rolls or pressure roll beams of the rewinder. These measuring devices can also provide information about the width of the customer rolls, their position on the rewinding cylinder, and the diameter distribution of the group of customer rolls. In this device, the measurement information can be provided to a controller connected to the control unit of the slitting rewinder. In practice, this type of measuring device has not been used to measure the diameter distribution of grouped customer rolls due to the difficulty in calibrating the measurements to provide reliable results. Furthermore, it should be noted that controlling the slitting rewinder has not provided a significant effect on the diameter distribution of grouped customer rolls.

[0010] Therefore, there is a need for diameter distribution measurements related to the rewinding machine of the slitting and rewinding machine in order to provide the fiber web production line with measurement information on the diameter distribution of grouped customer rolls in order to control the production of fiber webs, thereby eliminating or at least minimizing the non-uniformity of the lateral distribution of the fiber webs, and thus avoiding or at least minimizing the diameter differences of individual customer rolls in the grouped customer rolls.

[0011] The purpose of this invention is to create a diameter distribution measurement system and a diameter distribution measurement method, wherein the above-mentioned problems and disadvantages are eliminated or at least minimized.

[0012] A particular objective of this invention is to provide an improved diameter distribution measurement system and an improved diameter distribution measurement method, which can achieve reliable results and provide necessary feedback information to the fiber web production line. Summary of the Invention

[0013] To achieve the above-mentioned objectives and the objectives that will follow, the main features of the rewinder with a diameter distribution measurement system and the diameter distribution measurement method according to the present invention are as follows.

[0014] According to the present invention, a rewinder having a diameter distribution measurement system is a rewinder of a slitting rewinder and is configured to rewind customer rolls into grouped customer rolls. The rewinder includes two rewinding rollers and a pressure roller supported by a pressure roller beam. The customer roll is configured to be rewound on a support portion of the rewinding roller. The pressure roller is configured to support the customer roll from above during rewinding. The pressure roller and pressure roller beam are arranged to be movable in a vertical direction. The pressure roller beam includes a linear guide located on its longitudinal side. The diameter distribution measurement system includes a diameter distribution measuring device supported by a carriage. The measuring device is movably supported by the carriage on the linear guide. The diameter distribution measuring device includes a measuring laser sensor, and the measuring laser sensor is rotatably attached to the carriage via a rotatable attachment device for calibration measurement of the measuring laser sensor.

[0015] According to an advantageous feature of the invention, the measuring device has a measuring movement in which it is configured to move on a linear guide in the transverse direction of the rewinder, and during the measuring movement, a measuring laser sensor of the measuring device is configured to measure the distance from the outer peripheral surface of the customer roll to define the diameter distribution of the group of customer rolls supported by the rewinding roller.

[0016] According to an advantageous feature of the invention, the diameter distribution measurement information received from the measuring laser sensor is configured to be calibrated based on calibration distance measurement information at least one of the rewinding rollers.

[0017] According to an advantageous feature of the invention, the measuring system includes an actuator for moving the measuring device.

[0018] According to an advantageous feature of the invention, the measuring system includes a charging position having a charging device for charging the measuring device.

[0019] According to an advantageous feature of the invention, the measuring device of the measuring system is connected to the slitting and rewinding machine control system for data transmission.

[0020] According to an advantageous feature of the invention, the slitting and rewinding machine control system is connected to the production line control unit of the fiber web production line for data transmission, the rewinding machine is arranged to be connected to the production line control unit, and the slitting and rewinding machine control system is configured to provide feedback information to the production line control unit based on the measured diameter distribution information received from the measuring device.

[0021] According to an advantageous feature of the invention, the measuring device is wireless.

[0022] According to the present invention, a diameter distribution measurement method is provided for measuring the diameter distribution of a group of customer rolls rewound in a rewinder of a slitting rewinder, wherein the group of customer rolls is rewound on a support portion of a rewinding roller of the rewinder, and wherein the group of customer rolls is supported from above by a pressure roller supported by a pressure roller beam. In the diameter distribution measurement method, the diameter distribution is measured by a diameter distribution measuring device provided by a carriage during measurement movement. The carriage is movably supported on a linear guide arranged on a longitudinal side of the pressure roller beam. The diameter distribution measuring device measures the diameter distribution of the group of customer rolls by means of a measuring laser sensor, which is rotatably attached to the carriage by a rotatable attachment device for calibration measurement of the measuring laser sensor.

[0023] According to an advantageous feature of the invention, diameter distribution measurement is performed when the rewinding machine decelerates or stops.

[0024] According to an advantageous feature of the invention, diameter distribution measurement is performed when the rewinder is decelerated or stopped for group changes.

[0025] According to an advantageous feature of the invention, the measuring laser sensor is rotated to perform a calibration distance measurement of the distance from at least one of the rewinding rollers, which is measured by the measuring laser sensor.

[0026] According to an advantageous feature of the invention, in the method, the measuring device is charged by the charging device in the charging position.

[0027] According to an advantageous feature of the invention, in the method, the measurement result of the diameter distribution measurement performed by the measuring device is transmitted to the slitting and rewinding machine control system, which is used to transmit the measurement result as feedback information to the production line control unit of the fiber web production line that provides fiber webs to the rewinding machine.

[0028] This invention provides a novel and inventive method for measuring diameter distribution in relation to slitting and rewinding machines. By using the diameter distribution measurement system and method according to the invention, the diameter distribution of a group of customer rolls rewound in the rewinder of a slitting and rewinding machine can be reliably measured; therefore, the diameter distribution measurement results can be used as feedback information in fiber web production lines.

[0029] It has been noteworthy that the diameter distribution measurement system and method are used to measure the diameter distribution of a group of rewound customer rolls. The measuring device of the diameter distribution measurement system (and the method for diameter distribution measurement) provides reliable information about the diameter distribution of the group of customer rolls because the measurement results are received from a traverse measuring device equipped with a rotatable laser sensor. This rotatability allows the laser sensor of the measuring device to be positioned at a calibration measurement position. Therefore, the laser sensor of the measuring device comprises two main positions: a diameter distribution measurement position and a calibration measurement position. In the diameter distribution measurement position, the distance from the outer surface of the customer roll is measured, while in the calibration measurement position, the distance from at least one of the rewinding rollers is measured.

[0030] It has been noted with considerable interest that a diameter distribution measurement system and method are used to measure the diameter distribution of groups of customer rolls rewound in a twin-roll rewinder of a slitting rewinder. The measuring device of the diameter distribution measurement system (and the method thereof) is advantageously calibrated by measuring the position of a measurement laser sensor relative to at least one of the rewinding rolls and calibrating the diameter distribution measurement information based on this calibration measurement result. The measuring device is arranged to be attached to a lateral movement measuring device of the pressure roller beam of the respective twin-roll rewinder. Advantageously, for calibration, the position of the measurement laser sensor is measured relative to each rewinding roll to advantageously position the measurement laser sensor in the vertical and machine directions (in the main operating direction of the slitting rewinder). Advantageously, a correction factor is defined for the diameter distribution measurement results of the groups of customer rolls based on the calibration measurement results. Furthermore, it has been surprisingly discovered that by positioning a measuring laser sensor with a rotatable attachment device onto the pressure roller beam, calibration measurements can be performed based on a distance from at least one of the rewinding rollers. Therefore, a correction factor can be defined for the diameter distribution measurement results from the measuring laser sensor to obtain reliable, calibrated diameter distribution measurement information. The rotatable attachment device can be arranged, for example, by rotating a linkage or by adjusting screws. The calibration position for the rotation of the laser sensor is defined based on the geometry of the rewinder.

[0031] According to an advantageous aspect of the invention, in the diameter distribution measuring device, the measuring laser sensor has an accuracy of + / -0.2 mm. It should be noted that movably mounting a sensor with this accuracy onto a carriage (movably located on a guide arranged on the pressure roller beam) is challenging, and accuracy may be easily lost during installation. Therefore, rotatably attaching the measuring laser sensor to a carriage for calibration measurements of the measuring laser sensor via a rotatable attachment device provides an accuracy of at least + / -0.5 mm. In particular, due to the precise machining of the rewinding cylinder surfaces, the calibration measurements (which serve as distance measurements from at least one of the rewinding cylinders) provide very accurate calibration. Further advantageously, the received diameter distribution measurement results are wirelessly transmitted via a transmission unit to the control system and / or a portion thereof of the fiber web production line to which the slitting and rewinding machine is positioned, to provide diameter distribution information for controlling the production of the fiber web, resulting in an improved distribution of the fiber web, making the diameter distribution of the group of customer rolls substantially uniform, and thus enabling the pressure rollers to uniformly support the group of customer rolls during rewinding, and eliminating or at least minimizing harmful vibration effects.

[0032] According to an advantageous aspect of the invention, in a twin-roll rewinder, a pressure roll is provided, which is supported on a support structure of the twin-roll rewinder by a pressure roll beam. The pressure roll beam includes a horizontal guide on one longitudinal side, i.e., a lateral extension side relative to the main running direction of the fiber web, i.e., the axial direction of the group of customer rolls being rewound in the rewinder. A lateral movement measuring device is movably attached to the horizontal guide in the horizontal direction. The lateral movement measuring device includes a measuring laser sensor configured to measure the distance from the surface of each customer roll in the group to provide diameter distribution information of the customer rolls in the group. Advantageously, the measurement is performed after the group of customer rolls is completed and when the pressure roll has been removed upwards and out of contact with the surface of the customer roll. Alternatively, advantageously, the measurement is performed just before the group of customer rolls is completed and while the pressure roll is still in contact with the surface of the customer roll. These alternatives provide the ability to perform measurements without reducing the capacity of the slitting rewinder. The measuring laser sensor is calibrated by measuring its position relative to at least one of the rewinding rollers and calibrating the measurement result based on the calibration measurement result. Advantageously, for calibration, the position of the measuring laser sensor is measured relative to each rewinding roller.

[0033] According to an advantageous aspect of the invention, a diameter distribution measurement system and a diameter distribution measurement method are used to measure the diameter distribution of a group of customer rolls rewound in a twin-roll rewinder of a slitting rewinder, wherein the measuring device of the diameter distribution measurement system (and the measuring device for the diameter distribution measurement method) is automatically controlled.

[0034] According to an advantageous aspect of the invention, a diameter distribution measurement system and a diameter distribution measurement method are used to measure the diameter distribution of a group of customer rolls rewound in a twin-roll rewinder of a slitting and rewinding machine, wherein the measuring device of the diameter distribution measurement system (and the measuring device for the diameter distribution measurement method) is integrated into the slitting and rewinding machine.

[0035] According to an advantageous aspect of the invention, a diameter distribution measurement system and a diameter distribution measurement method are used to measure the diameter distribution of a group of customer rolls rewound in a twin-roll rewinder of a slitting rewinder. The measuring device of the diameter distribution measurement system (and the diameter distribution measurement method) can additionally perform measurements on the gap between adjacent customer rolls in the group of customer rolls and the width of the customer rolls in the group of customer rolls.

[0036] According to an advantageous aspect of the invention, the measuring device has a charging position with a charging device, in which the measuring device is charged during its rest period if necessary, so that continuous operation can be provided, and the measuring device will be continuously powered for measuring movement, so that its measuring time is always available for measuring diameter distribution.

[0037] According to an advantageous aspect of the invention, based on diameter distribution measurement results, feedback information is used for the control of the fiber web production line, enabling correction operations in fiber web production to provide a more uniform full-width fiber web distribution. These correction operations may, for example, be: adjusting the suspension supply from the headbox in the transverse direction, adjusting the transverse load distribution in the press section, adjusting at least one steam box effect in the transverse direction, adjusting the temperature distribution of at least one calendering roller in the transverse direction, or adjusting the humidity device in the transverse direction.

[0038] According to an advantageous aspect of the invention, based on diameter distribution measurement results, feedback information is used for the control of the slitting and rewinding machine, enabling correction operations to avoid vibration and / or provide a more uniform diameter distribution for grouped customer rolls.

[0039] The present invention and its advantageous features offer numerous benefits: providing reliable measurement information on the diameter distribution of grouped customer rolls, which can be used as feedback for the control of the fiber web production line to improve the distribution of the fiber web, thereby improving the uniformity of the diameter distribution of grouped customer rolls rewound in the rewinder of the slitting and rewinding machine, thus avoiding harmful vibrations and improving the operating performance of the slitting and rewinding machine. Precise calibration provides diameter distribution information with even + / -0.5 mm accuracy. Attached Figure Description

[0040] However, aspects and features of the invention, as well as its additional objects and advantages, will be best understood from the following description of some exemplary embodiments when read in conjunction with the accompanying drawings. The invention is described in more detail below with reference to the accompanying drawings, in which: Figure 1 The diagram schematically illustrates an advantageous example of a rewinder for a slitting and rewinding machine, which has a diameter distribution measurement system for a diameter distribution measurement method. Figure 2 The image shows a schematic 3D view of a portion of a rewinder of a slitting rewinder having a diameter distribution measurement system for a diameter distribution measurement method. Figure 3 The diagram schematically illustrates an advantageous example of a diameter distribution measuring device for a diameter distribution measuring system, and... Figure 4 The diagram schematically illustrates an advantageous example of a control system for a diameter distribution measuring device used in a diameter distribution measuring system. Detailed Implementation

[0041] In the following description, unless otherwise stated, the same reference numerals denote similar parts, and it should be understood that the examples are readily modified to suit different uses and conditions within the framework of the invention. For clarity, some repetitions of reference numerals may be omitted in the drawings.

[0042] Figure 1 An example of a diameter distribution measurement system for a diameter distribution measurement method associated with a rewinder 10 of a slitting rewinder is shown. This slitting rewinder typically also includes an unwinder and a slitting section located before the rewinder 10 in the operating direction of the slitting rewinder (i.e., in the operating direction of the fiber web / slit portion of the fiber web in the slitting rewinder). In the slitting section, the full-width fiber web unwound by the unwinder is guided between slitting blades for slitting, which cuts the full-width fiber web into partial fiber webs (partial webs) in the longitudinal direction of the fiber web. After slitting, the partial webs are guided to be rewound into customer rolls 15 on supports of rewinding rollers 11, 12 in the rewinder 10. These customer rolls are positioned axially adjacent to each other in the transverse direction as a set of longitudinal customer rolls. The customer rolls 15 are spaced apart such that there is a gap between two adjacent customer rolls 15. Figure 1As shown, the slitting and rewinding machine also includes a pressure roller 17 supported by a pressure roller beam 18, which is used to support the customer roll 15 from above during rewinding in the rewinder 10. The pressure roller 17 and pressure roller beam 18 move vertically. When a new group of customer rolls 15 begins, the pressure roller 17 and pressure roller beam 18 are at their lowest position, in contact with the winding core (around which the customer roll 15 will be rewound). As rewinding proceeds and the diameter of the customer roll 15 increases, the pressure roller 17 and pressure roller beam 18 move upwards accordingly while maintaining contact with the outer peripheral surface of the customer roll 15. When a group change is performed in the rewinder 10, the pressure roller 17 and pressure roller beam 18 move to their highest position without obstructing the group change device. The rewinder 10 also includes a diameter distribution measuring device 20 for measuring the diameter distribution of the group of customer rolls 15 to be rewound in the rewinder 10. A linear guide 21 for the measuring device 20 (…) Figure 2 The measuring device 20 is arranged along the longitudinal side of the pressure roller beam 18, connected to the pressure roller beam 18. It is positioned along this linear guide so that it is movable in the transverse direction (i.e., in the longitudinal direction of the pressure roller beam 18) of the rewinder 10. Therefore, the measuring device 20 is in traversing. The measuring device 20 includes a laser sensor for measuring the diameter distribution of the group of customer rolls 15 rewound in the rewinder 10. Therefore, the measuring device 20 is arranged to be movable in the transverse direction (i.e., in the longitudinal direction of the group of customer rolls 15) of the rewinder 10. Thus, the measuring device 20 is configured to have a traversing measuring movement in the transverse direction of the rewinder, during which the diameter distribution of the group of customer rolls 15 is measured. Advantageously, the measuring movement is performed when the rewinder 10 is slowed down, for example for a group change, and / or when the rewinder 10 is stopped, for example for a group change. Measurements taken during rewinding may not yield accurate results because customer rolls 15 may bounce during rewinding, especially when there are significant variations in diameter distribution, causing the pressure roller 17 to fail to contact all customer rolls 15 in the rewinding group. The measuring device 20 can also provide information about the width of the customer rolls 15, their positions on the rewinding rollers 11 and 12, and the gaps between adjacent customer rolls 15. The measurement information regarding the diameter distribution of the group of customer rolls 15 is transmitted to the slitting and rewinding machine control system 35. Figure 4 The slitting and rewinding machine control system provides information to the production line control unit 55 as feedback information on the lateral distribution of the full-width fiber web.

[0043] Figure 2 The diagram shows the rewinder 10 ( Figure 1 An example of a diameter distribution measurement system for a diameter distribution measurement method is shown, wherein the rewinder includes two rewinding rollers 11 and 12, and a group of customer rolls 15 are located on the rewinding rollers 11 and 12. A pressure roller beam 18 is used to support the pressure roller 17. Figure 1The pressure roller 17 is used to support the customer roll 15 from above in the rewinder 10 during rewinding. The pressure roller beam 18 includes a linear guide 21 arranged on its longitudinal side in connection with the pressure roller beam 18. The measuring device 20 is arranged along the linear guide so as to be movable in the transverse direction of the rewinder 10 (i.e., in the longitudinal direction of the pressure roller beam 18).

[0044] Figure 3 An example of a diameter distribution measuring device 20 for a diameter distribution measuring system is shown. The measuring device 20 is arranged to be attached to the pressure roller beam 18 of a corresponding twin-roll rewinder 10. Figure 1 , Figure 2 The transverse displacement measuring device 20 is provided. Therefore, the pressure roller beam 18 includes a horizontal linear guide 21 on one of its longitudinal sides, and the transverse displacement measuring device 20 is movably attached to the horizontal linear guide 21 via a carriage 22. The transverse displacement measuring device 20 includes a measuring laser sensor 25, which is supported by the carriage 22 and configured to measure the distance from each customer roll 15 in the group. Figure 1 , Figure 2 The distance between the surfaces of the rewinding rollers 11 and 12 is used to provide diameter distribution information for the customer rolls in that group. The measuring laser sensor 25 is rotatably attached to the pressure roller beam 18 via a rotatable attachment device 23, thus allowing the measuring laser sensor 25 to rotate from the diameter distribution measuring position to the calibration measuring position and vice versa. This is achieved relative to the rewinding rollers 11 and 12. Figure 1 , Figure 2The position of the measuring laser sensor 25 is measured at at least one of the positions of the measuring laser sensor 25, and the diameter distribution measurement result is calibrated based on the calibration measurement result. Advantageously, for calibration, the position of the measuring laser sensor 25 relative to each rewinding roller 11, 12 is measured. Advantageously, for calibration, the position of the measuring laser sensor 25 relative to each rewinding roller 11, 12 is measured to calibrate the diameter distribution measurement information received from the measuring laser sensor 25, advantageously in the vertical and in the machine direction (in the main running direction of the slitting rewinder). Advantageously, based on the calibration measurement result, a correction factor for the target diameter of the grouped customer rolls is defined. By providing the measuring laser sensor 25 of the measuring device 20 with a rotatable attachment device 23 attached to the pressure roller beam 18, the correction factor for the diameter distribution measurement of the measuring laser sensor 25 is calculated to obtain reliable, calibrated diameter distribution measurement information. The rotatable attachment device 23 can be arranged, for example, by rotating a linkage or by adjusting screws. The measuring device 20 has a charging position with a charging device 27, in which the measuring device 20 is charged when needed. The measuring system also includes an actuator 28 for moving the measuring device 20 on a linear guide 21. The measuring device 20 is arranged to have a data transmission connection with a slitting and rewinding machine control system 35. The slitting and rewinding machine control system 35 may have a power source (such as a battery), or it may be connected to a charging device.

[0045] Figure 4 An example of a control system for a diameter distribution measurement system and a diameter distribution measuring device 20 for a diameter distribution measurement method is shown. The control system includes a slitting and rewinding machine control system 35 that is data-connected to the diameter distribution measuring device 20 via a transmission unit 33. The slitting and rewinding machine control system 35 is a microprocessor or computer. The measurement results obtained by the diameter distribution measuring device 20 are transmitted to the slitting and rewinding machine control system 35, and by analyzing the measurement results, the slitting and rewinding machine control system 35 can send the data to the production line control unit 55 to provide information related to the measured group of customer rolls 15 (…). Figure 1The diameter distribution of the fiber web is used as feedback information related to its transverse distribution. The production line control unit 55 can provide control commands for calibration operations and / or information purposes to the production line and / or slitting and rewinding machine based on the diameter distribution information. The production line control unit 55 can also provide process data to the slitting and rewinding machine control system 35. The diameter distribution measurement information can also be stored in a storage device (not shown) and / or in the memory 353 of the slitting and rewinding machine control system 35 for later review. The slitting and rewinding machine control system 35 advantageously wirelessly connects to the measuring device 20 via a transmission unit 33 to receive calibration measurement results and diameter distribution measurement information from the diameter distribution measuring device 20. The slitting and rewinding machine control system 35 advantageously includes a computer program 351, a processor 352, and a memory 353. Additionally, the slitting and rewinding machine control system 35 may also include a power supply and a communication device. The slitting and rewinding machine control system 35 is configured to receive calibration measurement results from the measuring device 20, calculate a correction factor for the diameter measurement results based on the calibration measurement results from the measuring device 20, and define the diameter distribution and diameter variation of the grouped customer rolls 15. The slitting and rewinding machine control system 35 is configured to receive measurement results from the measuring device 20, and define the diameter distribution and diameter variation of the grouped customer rolls 15 based on the measurement results from the measuring device 20 and the calibration measurement data. The slitting and rewinding machine control system 35 controls the operation of a computer program 351, a processor 352, a memory 353, and other possible power and communication devices. The processor 352 of the slitting and rewinding machine control system 35 is advantageously configured to at least execute the transmission of data regarding the measured diameter distribution of the grouped customer rolls 15 to the production line control unit 55, initiated by the computer program 351. The computer program 351 may include one or more computer programs. The processor 351 may include one or more processors. The memory 353 of the slitting and rewinding machine control system 35 is configured to store and maintain data related to measurement results and transmitted from and / or into its related information from the measuring device 20. The data may be instructions, computer programs, and / or data files. The memory 353 includes one or more memories. The memory 353 is configured to store a computer program 351 configured to process measurement results and define feedback information to be transmitted based on the processing. The memory 353 may also be configured to store at least communication applications for operating (controlling) the communicator and power applications for operating the power supply. The communicator of the slitting and rewinding machine control system 35 may be configured to transmit data wirelessly or wiredly to one or more auxiliary devices, such as remote computers and / or laptops and / or smartphones.The slitting and rewinding machine control system 35 may also include a power source, which includes components configured to supply power to the slitting and rewinding machine control system 35, such as a battery and, for example, a regulator.

[0046] In the foregoing description, although some functions have been described with reference to certain features, these functions may be performed by other features, whether or not they are described. Although some features have been described with reference to certain embodiments or examples, these features may also exist in other embodiments or examples, whether or not they are described. The invention has been described above only by reference to some advantageous examples, and the invention is not limited to these examples. Many modifications and variations can be made within the scope of the invention as defined in the appended claims.

Claims

1. Rewinder with diameter distribution measurement system, the rewinder (10) being a rewinder (10) of a slitter rewinder and configured to rewind customer reels (15) into groups of customer reels (15), the rewinder (10) comprising two rewinding cylinders (11, 12) and a pressure roller (17) supported by a pressure beam (18), the customer reels (15) being configured to be rewound on a support of the rewinding cylinders, the pressure roller (17) being configured to support the customer reels from above during rewinding of the customer reels (15), and the pressure roller (17) and the pressure beam (18) being arranged movable in a vertical direction, characterized in that, The pressure roller beam (18) includes a linear guide located on its longitudinal side, and the diameter distribution measurement system includes a diameter distribution measurement device (20) supported by a carriage (22). The measurement device (20) is movably supported on the linear guide (21) by the carriage (22). The diameter distribution measurement device (20) includes a measuring laser sensor (25), and the measuring laser sensor (25) is rotatably attached to the carriage (22) by a rotatable attachment device (23) for calibration measurement of the measuring laser sensor (25).

2. The rewinder with a diameter distribution measurement system of claim 1, characterized in that, The measuring device (20) has a measuring movement in which it is configured to move on the linear guide (21) in the transverse direction of the rewinder (10), and during the measuring movement, the measuring laser sensor (25) of the measuring device (20) is configured to measure the distance from the outer peripheral surface of the customer roll to define the diameter distribution of the group of customer rolls (15) supported by the rewinding rollers (11, 12).

3. The rewinder with a diameter distribution measurement system according to claim 1 or 2, characterized in that, The diameter distribution measurement information received from the measuring laser sensor (25) is configured to be calibrated based on calibration distance measurement information based on the distance from at least one of the rewinding rollers (11, 12).

4. The rewinder with a diameter distribution measurement system according to any one of claims 1-3, characterized in that, The measurement system includes an actuator (28) for moving the measuring device (20).

5. The rewinder with a diameter distribution measurement system according to any one of claims 1-4, characterized in that, The measurement system includes a charging position having a charging device (27) for charging the measurement device (20).

6. The rewinder with a diameter distribution measurement system according to any one of claims 1-5, characterized in that, The measuring device (20) of the measuring system is connected to the slitting and rewinding machine control system (35) for data transmission.

7. The rewinder with a diameter distribution measurement system of claim 6, characterized in that, The slitting and rewinding machine control system (35) is connected to the production line control unit (55) of the fiber web production line for data transmission. The rewinding machine (10) is arranged to be connected to the production line control unit, and the slitting and rewinding machine control system is configured to provide feedback information to the production line control unit (55) based on the measured diameter distribution information received from the measuring device (20).

8. The rewinder with a diameter distribution measurement system according to any of claims 1-7, characterized in that, The measuring device (20) is wireless.

9. Diameter distribution measuring method for measuring the diameter distribution of grouped customer rolls rewound in a rewinder of a slitting rewinder, in which rewinder (10) the grouped customer rolls are rewound on a support of rewinding cylinders (11, 12) of the rewinder (10) and in which rewinder (10) the grouped customer rolls (15) are supported from above by a paper press roller (17) supported by a paper press roller beam (18), characterized in that, In the diameter distribution measurement method, the diameter distribution is measured by the diameter distribution measuring device (20) provided by the carriage (22) during the measurement movement. The carriage is movably supported on a linear guide (21) arranged on one longitudinal side of the pressure roller beam (18). The diameter distribution measuring device (20) measures the diameter distribution of the group of customer rolls (15) by means of a measuring laser sensor (25). The measuring laser sensor is rotatably attached to the carriage (22) by means of a rotatable attachment device (23) for calibration measurement of the measuring laser sensor (25).

10. The diameter distribution measurement method according to claim 9, wherein The diameter distribution measurement is performed when the rewinder (10) slows down or stops.

11. The diameter distribution measurement method according to claim 9 or 10, characterized by, The diameter distribution measurement is performed when the rewinder (10) slows down or stops for group replacement.

12. The diameter distribution measurement method according to any one of claims 9 to 11, characterized by, The measuring laser sensor (25) is rotated to perform a calibration distance measurement by measuring the distance from at least one of the rewinding rollers (11, 12) via the measuring laser sensor (25).

13. The diameter distribution measurement method according to any one of claims 9 to 12, characterized by, In the method, the measuring device (20) is charged by the charging device (27) in the charging position.

14. The diameter distribution measurement method according to any one of claims 9-13, characterized in that, In the method, the measurement result of the diameter distribution measurement performed by the measuring device (20) is transmitted to the slitting and rewinding machine control system (35) for transmitting the measurement result as feedback information to the production line control unit (55) of the fiber web production line that provides fiber webs to the rewinding machine (10).

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