DE102022003273A1 - Device, arrangement and method for measuring rolls of fibrous web material - Google Patents

Abstract

Device, arrangement and method for measuring rolls of fibrous web material. The device (6) comprises a detection device (7) which is provided with a contact element (8). The contact element is moved along an end surface (2) of a roller (1) and its movements (A) are detected by means of a sensor (9). Furthermore, the detection device is connected to a moving device (10) which can move the detection device in the transverse direction of the roll.

Description

Background of the Invention

The invention relates to a device for measuring rolls of fibrous web material, such as rolls of paper. In particular, the invention relates to a measuring device for detecting the shape of an end of the roll under test on the conveyor in a paper mill or other manufacturing plant.

The invention further relates to an arrangement and a method for measuring rolls of fibrous web material.

The field of the invention is defined more specifically in the preambles of the independent claims.

Fibrous web material, such as paper and paperboard, is wound onto cores to make rolls at paper mills and other manufacturing facilities for ease of handling and transportation. However, the shape of the rolls can vary, which can cause problems when stacking the rolls on top of each other. It is therefore common practice to measure the rolls using gauges at the manufacturing plant to avoid problems at later stages. For example, optical measuring systems have been developed for this purpose. Some known solutions are in the JP-H05330657-A , the JP-2001021319-A and FI-106446-B. However, it has turned out that the known measuring systems have problems.

Brief description of the invention

An object of the invention is to provide a new and improved apparatus, arrangement and method for measuring the rolls.

The device according to the invention is characterized by the characteristics of the first independent device claim.

The arrangement according to the invention is characterized by the characteristics of the second independent device claim.

The method according to the invention is characterized by the characteristics of an independent method claim.

An idea of the disclosed solution is that the measuring device comprises at least one detection device for detecting the shape of an end of the paper roll. One or more controllers are configured to determine the shape of the paper roll in response to sensing data received from the at least one sensing device. The detection device comprises at least one contact element and at least one sensor for detecting movement of the contact element. The apparatus further comprises at least one movement device for bringing the contact element into physical contact with an end face of the paper roll under test and for moving the contact element in the transverse direction of the paper roll. The detection data is detected by the at least one sensor during the transverse movement of the contact element.

In other words, the shape of the end face is detected by mechanical means and using direct mechanical contact.

An advantage of the disclosed solution is that color and other properties of the paper or other fibrous web material that is wound on the roll do not affect the accuracy of the measurement. The solution disclosed is also robust and works reliably due to its detection principle. In addition, lighting, dust and other circumstances at the measurement location do not affect the measurement.

In one embodiment, the roll being measured is an upright roll such that the end face is oriented vertically. In other words, the solution relates to the feeding of rolls standing on their cylindrical surfaces.

In one embodiment, the rolls are measured as they travel normally at manufacturing locations in a paper mill or other manufacturing facility. The disclosed solution can be arranged, for example, between a slitting and winding machine and a warehouse.

According to one embodiment, the disclosed solution is designed to detect errors in axial shapes of the end faces, i. H. to detect so-called plate formation or telescoping roll phenomena.

According to one embodiment, the measurement accuracy of the disclosed solution is a few tenths of a millimeter, preferably 0.2-0.6 mm.

According to one embodiment, the movement device is designed to move the contact element over the central axis of the roller.

According to one embodiment, the device is designed to also detect a possible protruding end of a core at a central part of the roll.

According to one embodiment, the movement device is designed as an alternative to driving the contact element offset from the central axis of the roll, so that the contact element is designed to pass a possibly protruding end of a core of the roll.

According to one embodiment, the moving device moves the contact element from a first peripheral edge point to an opposite second peripheral edge point over the end surface of the paper roll during the measuring process.

According to one embodiment, the movement device is designed to alternatively move the contact element over a limited distance in the radial direction of the end face of the roller.

According to one embodiment, the control unit is designed to provide data about the profile of the end face of the roll.

According to one device, the control unit is provided with limit values for allowed defects in the shape of the end face. Then the control unit can compare the registration data with the entered limits and accept the rolls within the limit and can provide control signals to direct the rolls exceeding the limits to a rework operation or to scrap. In other words, the control unit performs control actions in accordance with the detected flatness defects.

According to one embodiment, the contact element is a registration roller.

According to one embodiment, the contact element is a freely rotating capture roller.

According to one embodiment, the contact element is a probe.

According to one embodiment, the contact element can be, for example, a pin with a rounded detection head or a sliding element with any shape or form.

According to one embodiment, the movement device comprises at least one vertical guide post and a horizontal support vertically movably mounted on the vertical guide post. The detection device is mounted on the horizontal support and is provided with a first actuator to move the contact element in the transverse direction of the horizontal support and towards the end face of the roll. The detection device also includes a first sensor, which is designed to detect the transverse movement of the contact element.

According to one embodiment, in the solution disclosed above, the moving device comprises two vertical guide posts spaced from each other, and the horizontal support is vertically movably mounted between the two vertical guide posts.

According to one embodiment, the first actuator mentioned above is a linear actuator.

According to one embodiment, the linear first actuator is a fluid-operated cylinder or an electric solenoid.

According to one embodiment, the linear first actuator may alternatively comprise a motor and a gear system or a rack and pinion, and the motor may be an electric motor or a pneumatic or hydraulic motor.

According to one embodiment, the actuator with the first movement is a detector for detecting when the contact element reaches contact with the end face. The detector can be a pressure sensor or a proximity detector, for example.

According to one embodiment, the movement device comprises at least one robotic arm. The contact element is mounted on a free end of the robot arm. The movement device is provided with a positioning system for determining the position of the contact element in a three-dimensional coordinate system, and the control unit is designed for monitoring movements of the robot arm and the contact element and is designed for calculating the detection data of the end face of the detection roller.

According to one embodiment, the disclosed solution also relates to an arrangement for measuring rolls of fibrous web material. The arrangement comprises: a conveyor for transporting rolls on the conveyor in a manufacturing plant or a paper mill, and at least one device for detecting the shape of the inspected rolls and comprising at least one detecting device. The device for measuring the rolls is in accordance with the features disclosed in this document and the device is arranged in connection with the conveyor.

According to one embodiment, the conveyor is a continuous transport conveyor. The arrangement comprises at least one detection device for detecting the position of an end face of the roll when it reaches the device. Furthermore, the control unit is configured to stop the conveyor in order to place the roll to be measured in a predetermined measuring position with respect to the device.

According to one embodiment, the disclosed solution also relates to a method for measuring the shape of ends of rolls of fibrous web material on a conveyor. The method comprises the following: detecting the tested rolls by means of a device comprising at least one detecting device, providing said detecting device with at least one contact element, detecting the movement of the contact element with at least one sensor while the contact element is in physical contact on an end face of the tested roll is moved, moving the contact element transversely with respect to the longitudinal axis of the roller and collecting detection data from the sensor during the transverse movement of the contact element.

According to one embodiment, only one end of the roll is measured. Alternatively, both ends of the roll are measured, providing two devices for measuring.

The embodiments disclosed above can be combined to form suitable solutions with those of the above features that are necessary.

character list

• 1 eine schematische Ansicht einer Faserstoffbahnmaterialrolle,
• 2 eine schematische Ansicht einer Rolle und ihrer geformten Endflächen von oben,
• 3 ein schematisches Diagramm einiger Merkmale einer Vorrichtung, die zum Messen von Formen von Enden von Rollen gedacht ist,
• 4 eine schematische Seitenansicht eines Messprinzips der offenbarten Lösung,
• 5 ein schematisches Diagramm mit einer Darstellung einiger Messungen, die während Messphasen durchgeführt werden,
• 6 eine schematische Ansicht einer Messvorrichtung in der Längsrichtung einer zu messenden Rolle gesehen,
• 7 eine schematische Ansicht der in der vorherigen 6 gezeigten Vorrichtung von oben,
• 8 eine schematische Ansicht einer Messvorrichtung, die mit Mitteln zum Erfassen beider Endflächen einer Rolle versehen ist, von oben,
• 9 eine schematische Ansicht einer alternativen Art einer Messvorrichtung in der Längsrichtung einer zu prüfenden Rolle gesehen,
• 10 eine schematische Ansicht der in der vorherigen 9 gezeigten Vorrichtung von oben und
• 11 eine schematische Ansicht einer Messvorrichtung, die mit einem Roboterarm versehen ist, um die Erfassungsvorrichtung auf eine Endfläche einer Rolle zu bewegen.

Some embodiments are described in more detail in the accompanying drawings; show it:

• 1 a schematic view of a fibrous web material roll,
• 2 a schematic view of a roller and its shaped end faces from above,
• 3 a schematic diagram of some features of a device intended for measuring shapes of ends of rolls,
• 4 a schematic side view of a measuring principle of the disclosed solution,
• 5 a schematic diagram showing some measurements performed during measurement phases,
• 6 a schematic view of a measuring device seen in the longitudinal direction of a roll to be measured,
• 7 a schematic view of that in the previous 6 shown device from above,
• 8th a schematic view from above of a measuring device provided with means for detecting both end faces of a roll,
• 9 a schematic view of an alternative type of measuring device seen in the longitudinal direction of a roll to be checked,
• 10 a schematic view of that in the previous 9 shown device from above and
• 11 Fig. 12 is a schematic view of a measuring device provided with a robotic arm to move the detecting device onto an end face of a roll.

For reasons of clarity, the figures show some embodiments of the disclosed solution in a simplified form. In the figures, similar reference numbers indicate similar elements.

Detailed description of some embodiments

1 Fig. 1 shows a roller 1 with a cylindrical shape comprising opposite end faces 2a, 2b and a circumference 3. Figs. The roll 1 further includes a longitudinal axis 4. The roll 1 may comprise wound paper, cardboard or other wound fibrous web material. The fibrous web material can be wound onto a core 5 .

2 shows that problems in handling rolls and inaccuracy in their winding process can cause non-flat end faces 2a, 2b for the rolls 1. 2 Figure 12 shows that a first end 2a can project outwards and an opposite second end 2b can project inwards. It is of course clear that this type of end-forms causes problems in further operations, which is why such rolls must be identified and separated.

3 Figure 1 shows main features of a device 6 for detecting or measuring the shape of an end of a roll. The device 6 comprises one or more detection devices 7 for detecting the shape of the end faces. The detection device 7 comprises at least one contact element 8 and at least one sensor 9 for detecting movement of the contact element 8. Further, the device 6 comprises one or more movement devices 10 to bring the contact element 8 into physical contact with an end face of the tested paper roll and to Contact element 8 during the measurement phase in the transverse direction to move the paper roll. The sensor 9 generates detection data which is transmitted to a control unit CU through a data communication link, which may be wired or wireless.

4 1 shows that a measuring device 6 can comprise a first actuator 11 to move the contact element 8 in a horizontal direction A towards an end surface 2 of a roll 1. FIG. The first actuator 11 can be a pressure medium cylinder, for example. A first sensor 9a is designed to detect the transverse movement. The contact element 8 can be a registration roller 12 which is rolled along the end surface 2 . Initially, the contact element 8 is applied to the end surface 2 by the movement A, and then the actual measurement takes place by the transverse movement B of the contact element 8 along the end surface. The movement B can be vertical or in any other direction transverse to the direction of the longitudinal axis of the roll 1 . The movement B can extend from a first peripheral edge point 13a to an opposite second peripheral edge point 13b. Furthermore, the movement path B can be arranged so that it goes over the central axis of the roller 1, if necessary. One or more second sensors 9b for detecting movements in direction B can be present.

5 Figure 12 shows that detection data 14 generated by the sensors is collected and input to a control unit CU provided with at least one processor and a computer program product for processing the detection data and for determining shape data about the end face of a roll. The data generated, such as data on the final profile 15, can be displayed on a user interface UI and desired datasets can be generated for further analysis and needs. Limit values 16 can also be entered into the control unit CU so that it can be determined whether the shape of the end face of the roll is acceptable 17 or whether the roll must go to scrap 18 entirely or can be reworked 19 to improve its condition.

6 Figure 1 shows a measuring device 6 provided with a movement device 10 comprising two vertical guide posts 20a, 20b arranged on opposite sides of a conveyor 21 on which a roll 1 is transported. A horizontal support 22 is mounted to the vertical guide posts 20 for vertical movement. A detection device 7 is mounted on the horizontal support 22 and is provided with a first actuator to move the contact element in the transverse direction of the horizontal support 22 and towards an end face 2 of the roll 1 . Details of the detection device 7 are in 6 Not shown. The detection device 7 can be moved along a vertical line 23 during the measurement.

7 is a view of the arrangement of FIG 6 from above. The conveyor 21 may be a continuous transport conveyor and there may be one or more detecting devices 24 for detecting the position of at least one of the end faces 2a, 2b of the roll 1 upon reaching the device 6. A control unit CU can stop the conveyor 21 to place the roll 1 to be measured at a predetermined measuring position D with respect to the device 6 .

8th Figure 1 shows a solution using two devices 6a, 6b for gripping both ends 2a, 2b of a roll 1.

9 and 10 show a measuring device 6, which differs from that in 6 - 8th shown differs in that a movement device 10 comprises only one vertical guide post 20. Furthermore, a contact element 8 of a detection device 7 is a probe 25.

11 Fig. 1 shows a measuring device 6 in which a movement device 10 comprises a robotic arm 26 which can move in various directions in a versatile and precise manner. Mounted on a distal end of the robotic arm 26 is a sensing device 7 conforming to the features disclosed herein.

The drawings and the related description are only intended to illustrate the idea of the invention. In its details, the invention may vary within the scope of the claims.

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• JP H05330657 A [0004]
• JP2001021319A [0004]

Claims (13)

Device (6) for measuring a fibrous web material roll (1); the device (6) comprising: at least one detection device (7) for detecting the shape of an end of the roll (1) and at least one control unit (CU) adapted to detect the shape of the roll (1) in response to detection data (14) obtained from the at least one detection device (7); characterized in that the detection device (7) comprises at least one contact element (8) and at least one sensor (9) for detecting the movement of the contact element (8); the device (6) further comprises at least one movement device (10) for bringing the contact element (8) into physical contact with an end face (2, 2a, 2b) of the tested roll (1) and for moving the contact element (8) in the transverse direction to move with respect to the longitudinal axis of the roll (1); and wherein the detection data (14) are designed to be detected by the at least one sensor (9) during the transverse movement (B) of the contact element (8) along the end surface (2, 21, 2b); and further that the moving device (10) is designed to move the contact element (8) over the central axis of the roll (1), whereby the device is designed to also detect a possible protruding end of a core at a central part of the roll ( 1) to capture. device after claim 1 , characterized in that the movement device (10) is designed to move the contact element (8) during the measuring process from a first peripheral edge point (13a) to an opposite second peripheral edge point (13b) via the end surface (2, 2a, 2b) of the roller ( 1) to move. device after claim 1 or 2 , characterized in that the control unit (CU) is designed to provide data about the profile (15) of the end face (2, 2a, 2b) of the roll (1). Device according to one of the preceding Claims 1 - 3 , characterized in that the control unit (CU) is provided with limit values (16) for allowed defects in the shape of the end face (2, 2a, 2b); and the control unit (CU) is designed to compare the detection data (14) with the entered limit values (16), and is designed to accept the rolls (1) within the limit values (16) and to provide control signals to the the limit values (16) to direct crossing rolls (1) to a rework operation (19) or to scrap (18). Device according to one of the preceding Claims 1 - 4 , characterized in that the contact element (8) is a detection roller (12). Device according to one of the preceding Claims 1 - 4 , characterized in that the contact element (8) is a probe (25). Device according to one of the preceding Claims 1 - 6 characterized in that the moving device (10) comprises at least one vertical guide post (20) and a horizontal support (22) vertically movably mounted on the vertical guide post (20); the detection device (7) is mounted on the horizontal support (22) and is provided with a first actuator (11) to move the contact element (8) in the transverse direction of the horizontal support (22) and towards the end face (2, 2a, 2b) to move (A) towards the roller (1); and the detection device (7) comprises a first sensor (9a) which is designed to detect the transverse movement (A) of the contact element (8). device after claim 7 characterized in that the moving device (10) comprises two vertical guide posts (20a, 20b) spaced from each other and the horizontal support (22) is vertically movably mounted between the two vertical guide posts (20a, 20b). device after claim 7 or 8th , characterized in that the first actuator (11) is a linear actuator. Device according to one of the preceding Claims 1 - 6 , characterized in that the movement device (10) comprises at least one robotic arm (26); the contact element (8) is mounted on a free end of the robot arm (26); the movement device (10) is provided with a positioning system for determining the position of the contact element (8) in a three-dimensional coordinate system, and the control unit (CU) is designed for monitoring movements of the robot arm (26) and the contact element (8) and for calculating of the detection data (14) of the end face (2, 2a, 2b) of the roll (1). An arrangement for measuring rolls of fibrous web material (1), the arrangement comprising: a conveyor (21) for transporting rolls (1) on the conveyor (21) in a manufacturing plant and at least one device (6) for detecting the shape of the tested rolls (1) and comprising at least one detecting device (7); characterized in that the device (6) for measuring the rolls (1) has the preceding claims 1 - 10 is equivalent to; and wherein the device (6) is arranged in connection with the conveyor (21). arrangement according to claim 11 , characterized in that the conveyor (21) is a continuous transport conveyor; the arrangement comprises at least one detection device (24) for detecting the position of an end face (2, 2a, 2b) of the roll (1) when it reaches the device (6), and the control unit (CU) is adapted to control the conveyor ( 21) to place the roll (1) to be measured in a predetermined measuring position (D) with respect to the device (6). A method for measuring rolls (1) of fibrous web material on a conveyor (21), the method comprising: detecting the shape of the rolls (1) under test by means of a device (6) comprising at least one detection device (7); characterized by providing said detecting device (7) with at least one contact element (8); detecting the movement (A) of the contact element (8) with at least one sensor (9, 9a) while the contact element (8) moves into physical contact on an end surface (2, 2a, 2b) of the tested roll (1) (B) becomes; moving (B) the contact element (8) transversely with respect to the longitudinal axis of the roller (1); collecting detection data (14) from the sensor (9, 9a) during the transverse movement of the contact element (8) along the end surface (2, 21, 2b); and moving the contact element (8) over the central axis of the roll (1), also detecting a possible protruding end of a core at a central part of the roll (1).

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