DE102020103779B4 - Roll arrangement for a rolling mill for rolling tool monitoring - Google Patents

Abstract

The invention relates to a roll arrangement for a rolling mill for monitoring rolling tools, with a roll (1), an axle (2), journals (3) for mounting the axle (2) and a roll shell (4) for deforming, shaping or similar metal processes. The roll (1) is provided with sensors (7, 16) for measuring different physical properties both in the area of the roll shell (4) and in the area of the journals (3), the output signals of which are fed to the roll tool monitoring system for monitoring and control. The sensors (7, 16) are arranged in cavities (6, bores 12 to 14) of the roller (1).

Description

The invention relates to a roll arrangement for deforming, shaping or similar processes of rolling stock for a rolling mill with a roll tool monitoring system, with at least one roll of the roll arrangement having two journals for mounting the roll in a roll stand and a roll shell. With such roller arrangements, metal materials, for example, are deformed between two or more rotating tools during pressure forming, thereby reducing their cross-section.

The collection of data is becoming more and more important, especially in the rolling mill, a lot of data is only measured superficially and from the outside and is therefore sometimes falsified by external influences or properties.

the WO 2014/195309 A1 relates to pairs of grinding rollers for processing a granular material to be ground, in particular for grinding grain, with at least one roller having sensors for obtaining measured values characterizing a state of at least one of the rollers. The sensors can have a data connection to a data transmitter, which transmits the measured values to a data receiver without contact.

From the DE 10 2013 000 970 A1 a measuring roller for detecting deviations from the flatness of a strip-shaped product and a method for detecting deviations from the flatness of a strip-shaped product are already known. This measuring roller, which cannot be used as a roller, already has a sensor in the area of the casing of the measuring roller. This sensor is not intended to determine the condition of the measuring roller, but rather the flatness deviations of a strip guided over the measuring roller.

From the DE 697 32 183 T2 a bearing with a sensor module is known. The sensors are not installed in the bearing journal, but in the bearing itself.

The Post-Released EP3623 067A1 discloses a system and method for determining the number of revolutions of a roller. For this purpose, a rotation sensor is provided in the bearing journal of the roller. Other sensors, for example in the area of the roll shell, are not suggested.

The invention is based on the task of designing a roll arrangement of the type mentioned at the outset in such a way that data on the condition of the rolls and the roll stand in contact with the roll (directly or indirectly) can be determined as precisely and unfalsified as possible directly on the tool, so that the Rolling mill control can be optimized.

The object is achieved according to the invention for a roller arrangement of the type mentioned by the features specified in claim 1. Advantageous developments are specified in the dependent patent claims.

The object is achieved according to the invention in that the roll is provided with sensors for measuring different physical properties both in the area of the roll shell and in the area of the journals, with the sensors being arranged in cavities in the roll and their output signals being fed to the roll tool monitoring system for evaluation and can then be used to control or regulate and/or monitor the roller arrangement and/or the rolling stand. As a result, precise data is obtained directly or indirectly on the condition of the roll and on the roll stand or roll bearings in contact with the roll, so that the roll mill control can be optimized in this way. Significant quality advantages and savings can be achieved through an automated, intelligent adjustment of the rolling mill or an early change of the roll before possible damage.

It has proven to be advantageous if the cavities of the roller are arranged lengthwise, transversely and/or at an angle to the roller.

It is noteworthy that the different sensors can be, for example, temperature sensors, structure-borne noise sensors, acceleration sensors, vibration sensors, strain gauges and/or ultrasonic sensors.

It has proven to be advantageous for the sensors inside the roll to be temperature sensors and for the roll tool monitoring to be designed in such a way that the cooling of the rolls is adjusted and/or the roll arrangement is switched off if a predetermined target temperature of, for example, 60° C. is exceeded.

The sensors in the journal can also be temperature sensors and the rolling tool monitoring can be designed in such a way that when a predetermined operating temperature of, for example, 120° C. is exceeded, more lubricant is supplied, the roll parameters are changed and/or the roll arrangement is switched off.

Advantageously, the sensors in the roll strain gauges and the rolling tool monitoring can be designed such that when a dynamic is exceeded Threshold of 250 MPa, for example, the rolling mill parameters are adjusted.

It is advantageous that the roller consists of a solid body, a hollow body or an axle with an applied roller shell. It is worth emulating that the cavities are formed by grooves and/or bores.

In order to be able to reliably carry out the data transmission in the roll arrangement according to the invention, it is recommended that the data transmission be completely wireless or wired up to the journal and then wireless or by means of a rotary feedthrough with a direct connection to the rolling tool monitoring.

It has proven itself that two rollers are provided with sensors, or that at least one supporting roller, which is provided with sensors, is assigned to the roller.

• 1 eine längs geschnitten dargestellte Walze für ein Walzwerk mit Walzwerkzeugüberwachung mit unter dem Walzenmantel positionierten Sensoren,
• 2 eine Seitenansicht der Walze gemäß 1 und
• 3 eine alternative Walze für ein Walzwerk mit Walzwerkzeugüberwachung in geschnittener Darstellung mit in der Achse positionierten Sensoren.

The invention is explained in more detail below with reference to exemplary embodiments illustrated in the drawing. Show it:

• 1 a roll shown in longitudinal section for a rolling mill with rolling tool monitoring with sensors positioned under the roll shell,
• 2 a side view of the roller according to FIG 1 and
• 3 an alternative roll for a rolling mill with roll tool monitoring in a sectional view with sensors positioned in the axis.

the 1 shows a longitudinal section of a roll 1 for a rolling mill with rolling tool monitoring with an axis 2, with pins 3 lying at the ends thereof for mounting the axis 2 in bearings of roll housings of a roll stand, not shown. A roller shell 4 is applied to the axle 2 as a useful area, which is laterally delimited by rings 5 . Between the axle 2 and the roll shell 4 cavities 6 are provided, which are introduced as grooves or bores in the axle 2 and/or the roll shell 4 . Various sensors 7 for measuring different physical properties are arranged in the cavities 6 under the roll shell 4 and are connected to one another via multi-core cables 8 . The sensors 7 are also connected to an energy receiver and data transmitter 9 which is arranged centrally in one of the spigots 3 and communicates via radio with a transmission module 10 arranged outside in the area of the spigot 3 . The data transmitter 9 rotating with the axis 2 is used for contactless transmission of the measured values of the sensors 7 to the stationary transmission module 10 as a data receiver. Wireless power transmission can also take place via the transmission module 10 . The supply voltages are fed to the transmission module 10 by means of a connecting cable 11 and the data from the sensors 7 are sent to a rolling tool monitor. A wired power supply, for example with slip rings, can also be set up via the pin 3 . If necessary, however, the data can also be transmitted in this way.

The different physical properties to be measured by the sensors 7 can be, for example, temperature, structure-borne noise, acceleration, vibration, strain and/or ultrasound.

The transmission module 10 is constructed in such a way that it also withstands industrial environments, ie heat, dust, oils, etc. The electrical energy is transmitted inductively to the energy receiver and data transmitter 9 in the roll neck with the data transmission peripherals installed accordingly.

In the 2 is the roller 1 according to 1 shown in plan view of the pin 3. The energy receiver and data transmitter 9 are arranged in the interior of the spigot 3 , covered by the transmission module 10 . The journal 3 is surrounded by one of the rings 5 and the roller shell 4. Between the journal 3 and the roller shell 4, the cavities 6 for receiving the various sensors 7 are arranged covered by the ring 5.

the 3 shows an alternative roll arrangement for a rolling mill with rolling tool monitoring in a sectional representation, in which the sensors are positioned in axis 2. For this purpose, 6 bores are introduced in the axis 2 as cavities. Diagonal or oblique bores 13 branch off from a longitudinal bore 12 arranged in the middle of the axle 2 , for example in the area of the roll shell 4 , and transverse bores 14 in the area of the pins 3 . Various types of sensors 7 for measuring different physical properties are arranged in the bores 12 to 14 and are connected to one another via multi-core cables 8 . Temperature sensors 16 , for example, are arranged in the transverse bores 14 in the region of the pins 3 . These sensors 7 and 16 are also connected to the energy receiver and data transmitter 9 arranged in the center of one of the spigots 3, which communicates via radio with a transmission module 15 arranged outside in the area of the spigot 3. The supply voltages are fed in by means of a connecting cable 11 and the data from the sensors 7 are sent to a rolling tool monitor. This information Production data of the tool, but also its immediate surroundings, are evaluated and can be used, for example, to optimize the rolling mill parameters, to avoid accidents, to detect damage at an early stage or to improve the tool itself. This roller 1 can be used as a measuring roller in almost any forming process.

The invention relates to rolling tool monitoring for a rotationally symmetrical body, a roll 1, for deforming, shaping or similar processes of different materials, such as ferrous materials and other metals.

The aim is to obtain data on the condition of the rolls and the roll stand in contact with the roll 1 directly or indirectly directly at the tool, and to use this to optimize the roll mill control.

For this purpose, this roller 1 is equipped with different sensors 7 and 16, for example temperature, acceleration, structure-borne noise sensors and/or strain gauges, as a result of which the current state of the roller can be measured and read out.

By measuring directly in roll 1, better and more accurate data could be collected. The challenges in the rolling mill environment are not insignificant for this. In the area of steel production, a hole can be drilled under the roll shell 4 or right through the roll 1, so that things such as the roll temperature depending on the thickness of the roll shell 4, accidents within the rolling mill and even shells or broken rolls can be detected at an early stage without affecting the roll 1 itself can be before these roll stands damage. Furthermore, the environment can be monitored and optimized. Temperature sensors 16 in the bearing area can, for example, monitor the bearing temperatures and optimize the use of lubricant and prevent pin fractures due to so-called bearing seizures. In turn, the loads can be read via strain gauges in roll 1 and adjusted in the event of overloads in the roll stand. The selection of the parameters to be recorded is only limited by the possibilities of the current sensors 7 . An intelligent combination of different sensors also leads to further early warning systems or findings.

Furthermore, in a so-called resleeve method, a measuring axis can also be reused after operation and only the worn wear layer, the roller shell 4, can be regenerated.

In summary, it can be stated that the roll arrangement according to the invention enables comprehensive roll tool monitoring in a rolling mill, with the help of which information about the roll tool, but also about its immediate surroundings, can be collected and evaluated. This data can be used, for example, to optimize rolling mill parameters, avoid accidents, detect damage at an early stage or improve the rolling tool itself. This measuring roller can be used in almost any forming process.

The roller 1 can consist of a solid body, a hollow body or an axle 2 with a roller jacket 4 that is shrunk on or otherwise applied, for example by welding or plating.

The measuring instruments are placed as directly as possible, with a necessary safety distance of between 0 and 50 mm, under the roll shell 4 and/or the surface. To ensure this, cavities 6 such as bores 12, 13 under the wear layer of the roll shell 4 or transverse bores 14 in the axis 2 can be introduced into the solid or hollow rollers, in which the sensors 7 and 16 can be introduced and/or fixed.

These bores 12 to 14 can be made in the roller 1 one or more times, for example offset by 180°, as a result of which more detailed information about the roller 1 can be recorded.

Is it an axis 2 with applied roller shell 4 according to 1 , the sensors are placed in prepared grooves in the axis 2 to form the cavities 6 and then the roll jacket 4 is applied.

The roller 1 can also be coupled to other measuring rollers, for example also support rollers, as a result of which the adjustments to parameters and the information obtained can be increased.

The connection to a reading device is either completely wireless or wired up to the pin and then wireless or by means of a rotary union with a direct connection.

If the forwarding is wired, these can be routed through the barrel or rings and routed through another hole in the pin 3 to the end of the roller. The aim is to have no exposed wires on the roller and to transmit the energy and data wirelessly.

A wired power supply can be set up in the spigot itself, or wireless power transmission can also take place via the transmission module 10 . Furthermore, a data receiving module based on Bluetooth, W-LAN or similar data transmission standards can be integrated in the module 10 so that the data can also be transmitted wirelessly to corresponding software.

The temperature sensors 16 in the journal 3 are specifically intended to measure and monitor the bearing temperatures directly on the tool. In addition to process monitoring and the prevention of tool damage, the aim is to enable the optimization of accompanying substances such as coolants and/or lubricants. This can result in significant cost savings for the user.

In addition to the optimization of equipment, damage should also be prevented. In the area of bearings, this would be specifically the detection of problems in the bearing area when the operating temperature rises above 120°C, for example, with the value depending on the bearing type. Above this temperature range, it must be assumed that the bearing is blocked and damage to the journal or even fracture of the journal can occur. The rolling miller can then decide whether more lubricant is needed, whether the roll parameters need to be changed or whether the rolling must be stopped in order to ensure a safe process flow. Or the rolling tool monitor intervenes automatically and controls the required process.

Temperature sensors inside the rolls monitor the rolling process with regard to the correct cooling of the tool. From a temperature of 60°C, for example, the cooling of the rolls can be adjusted in the rolling mill, since otherwise the roll surface can be damaged or the rolled material does not leave the rolling train in the desired quality. This temperature value depends on the positioning of the temperature sensor 16, the condition of the tool and the material.

With strain gauges behind the bearing area and in the roller 1 itself, the elongation of the tool can be recorded and interpreted. From a material-dependent dynamic threshold value of, for example, 250 MPa, an overload can be assumed and the roller 1 runs the risk of breaking or at least being damaged. The limit threshold is defined for each material. Due to the adjustment of rolling mill parameters by the rolling tool monitoring, a response can be made and the rolling mill can continue to produce optimally.

Structure-borne noise sensors in the roll 1 itself can detect shells, cracks, fractures and similar damage before they can escape to the surface and damage the rolling mill in the event of damage.

Acceleration sensors monitor roller rotation speeds to ensure correct working conditions.

Other sensors, such as vibration sensors, ultrasonic sensors, and the like, expand the options for tool monitoring.

Reference List

1

roller

2

axis

3

cones

4

roller shell

5

rings

6

cavities

7

sensors

8th

cable

9

Energy receiver and data transmitter

10

transmission module

11

connection cable

12

longitudinal bore

13

Diagonal or inclined drilling

14

cross bore

15

transmission module

16

temperature sensors

Claims (11)

Roll arrangement for deforming, shaping or similar processes of rolling stock for a rolling mill with a roll tool monitoring system, wherein at least one roll (1) of the roll arrangement has two journals (3) for mounting the roll (1) in a roll stand and a roll shell (4), characterized that the roller (1) is provided with sensors (7, 16) for measuring different physical properties both in the area of the roller shell (4) and in the area of the journals (3), the sensors (7, 16) being located in cavities ( 6, 12 to 14) of the roller (1) are arranged, and that the output signals of the sensors (7, 16) are fed to the roll tool monitor for evaluation and can then be used to control or regulate and/or monitor the roll arrangement and/or the roll stand. roller arrangement claim 1 , characterized in that the cavities (6) of the roller (1) are arranged longitudinally, transversely and/or obliquely to the roller (1). roller arrangement claim 1 or 2 , characterized in that the different sensors (7, 16) are temperature sensors, structure-borne noise sensors, acceleration sensors, vibration sensors, strain gauges and/or ultrasonic sensors. Roller arrangement according to one of Claims 1 until 3 , characterized in that the sensors inside the roller (1) are temperature sensors (16) and that the roller tool monitoring system is designed in such a way that the cooling of the rollers (1) is adjusted if a predetermined target temperature of, for example, 60°C is exceeded and /or the rolling arrangement can be switched off. Roller arrangement according to one of Claims 1 until 4 , characterized in that the sensors in the journal (3) are temperature sensors (16) and that the rolling tool monitoring is designed in such a way that if a predetermined operating temperature of, for example, 120°C is exceeded, more lubricant can be supplied, the roll parameters can be changed and /or the rolling arrangement can be switched off. Roller arrangement according to one of Claims 1 until 5 , characterized in that the sensors (7, 16) in the roll (1) are strain gauges, and that the rolling tool monitoring is designed such that the rolling mill parameters can be adjusted if a dynamic threshold value of 250 MPa, for example, is exceeded. Roller arrangement according to one of Claims 1 until 6 , characterized in that the roller (1) consists of a solid body, a hollow body or an axle (2) with an applied roller shell (4). Roller arrangement according to one of Claims 1 until 7 , characterized in that the cavities (6) are formed by grooves and/or bores (12 to 14). Roller arrangement according to one of Claims 1 until 8th , characterized in that the data transmission is completely wireless or wired up to the journal and then wireless or has a direct connection to the rolling tool monitoring by means of a rotary feedthrough. Roller arrangement according to one of Claims 1 until 9 , characterized in that two rollers (1) are provided with sensors (7, 16). Roller arrangement according to one of Claims 1 until 10 , characterized in that the roller (1) is assigned at least one supporting roller which is provided with sensors (7, 16).

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