DE102021204580A1 - Method and device for aligning at least one lateral guide of a roll stand - Google Patents

Abstract

The invention relates to a method and a device for aligning at least one lateral guide for laterally delimiting a transport path, in particular for a rolling stock to be rolled through a roll stand. For this purpose, it is proposed according to the invention to first define the central axis of a transport path, then to move all actuators of the lateral guide rails into their respective minimum extended position. Then the respective right-angled distances of at least two measuring points per lateral guide to the central axis are determined in order to then determine an individual calibration stroke for each individual actuator for controlling the lateral guide from the minimum of these right-angled distances. Finally, each of the actuators is calibrated in that its individual extended position—starting from its minimum extended position—is changed by the calibration stroke calculated for it.

Description

The invention relates to a method and a device for aligning at least one lateral guide for laterally delimiting a transport path for a product, in particular for a rolling stock to be rolled through a roll stand.

Such methods and devices are known in principle in the prior art. This is what the European patent specification discloses EP 3 365 120 B1 a casting or rolling plant for producing or processing a cast strand. The system has a transport path for the cast strand, with side guides being provided at the edge of the transport path for guiding the cast strand. The side guides are moved in and out of the transport path transversely to the line of the transport path with the aid of actuators. The European patent specification also discloses a method for measuring such a lateral guide using laser light in order to be able to determine the degree of wear in certain partial areas of the lateral guide. Said measuring system is built into the casting or rolling plant and calibrated there before it is used. In this context, calibration initially means the fine adjustment or fine positioning of a light source, a receiving device and, if applicable, a reflector device with the aid of associated adjusting elements such that they are optimally aligned with one another and can interact.

The state of the art also includes the Chinese utility model CN 203370832 U, which primarily describes the structural design of a caliper for the parallel alignment of lateral guides at the edge of a transport path for slabs in particular. In addition to the parallel alignment of the lateral guides to each other and to the specified center line of the transport path, the caliper also ensures that the respective distances from opposite lateral guides to the center line do not deviate from each other by more than 5 mm.

The object of the invention is to provide an alternative method and an alternative device for aligning at least one lateral guide for laterally delimiting a transport path for a product, in particular a rolled stock to be rolled through a roll stand.

With regard to the method, this object is achieved by the method claimed in patent claim 1 .

At least one lateral guide ruler is aligned parallel to the central axis of the transport path by the claimed method. The claimed calibration of the at least one lateral guide ruler along the transport path advantageously ensures a uniform, homogeneous run of the product to be transported, i. H. in particular, curvatures in the product are prevented. The drive-side and operator-side lateral guides calibrated according to the invention are advantageously set parallel and aligned with one another by the method according to the invention, and the opening dimension of the lateral guides is calibrated in a common process sequence.

The claimed right-angled distance measurement, starting from the central axis of the transport path to the measuring points, which represent the points of action of the actuators on the lateral guide rails, can be carried out mechanically, by means of a laser or visually.

The term "points of attack ... represent" here means "in the immediate vicinity", ideally in the middle of the articulated points of attack. Also included in the meaning is a measuring point on the inside of a cornering ruler at the shortest distance from the point of application of the actuator. The position of the measurement points is preferably chosen to be the same in relation to all points of application.

The parameter i designates a control variable; it describes the number of measurement points, the number of position sensors and the number of actuators. According to the invention, this is possible and useful because a position sensor and a measuring point must be assigned to each actuator; otherwise the method cannot be carried out with the respective actuator.

The claimed calibration method and the calibration of the opening dimensions of the lateral guides are particularly important during the initial assembly and commissioning of a roll stand, but also for later necessary realignments and calibrations, e.g. B. after maintenance shutdowns and after replacing various components of the system very helpful. Especially with modernizations, misalignments of the cornering guides due to dimensional deviations due to existing old system components and old foundations can be corrected by the design with independently adjustable rulers in conjunction with the calibration method according to the invention using the calibration method according to the invention.

Preferably, according to a first embodiment, each of the lateral guides controlled by at least two actuators, which are arranged offset in the longitudinal direction of the transport path in an articulated manner on the lateral guide rail. The actuators are advantageously articulated in each case on the (outside) side of the lateral guide rails facing away from the center of the transport path. The insides of the lateral guides should be kept as smooth as possible to ensure that the product can slide along unhindered. According to the invention, the actuators can be controlled individually for position with the aid of assigned position sensors, ie displacement sensors, preferably so-called temposonics.

• Zunächst werden ein erster Referenzpunkt x und ein zweiter Referenzpunkt y festgelegt, die beide auf der Mittenachse liegen sollen zum Definieren der Mittenachse. Vorzugsweise wird weiterhin ein Laserstrahl als Referenzachse entlang der durch die Referenzpunkt x und y definierten Mittenachse des Transportweges ausgerichtet.

According to a further exemplary embodiment of the method according to the invention, the step of defining the central axis of the transport path takes place in the following sub-steps:

• First, a first reference point x and a second reference point y are established, both of which should lie on the center axis to define the center axis. Furthermore, a laser beam is preferably aligned as a reference axis along the central axis of the transport path defined by the reference points x and y.

Further exemplary embodiments of the method according to the invention relate to different possible transport routes. A transport route can mean the entry in front of a roll stand, or the entry and the passage of the rolling stock through the nip of the roll stand, or the passage of the rolled stock through the nip and the exit from the roll stand, or the exit from the roll stand, or the entry in front of the roll stand , the passage through the roll stand and the exit from the roll stand. The side guides can be arranged differently for all these variants of the transport path. For all of these variants, however, the method according to the invention offers a reliable option for calibrating the cornering guides or the actuators.

The object of the invention is finally achieved by claim 10 with regard to the device. The advantages of this solution correspond to the advantages mentioned above with reference to the claimed method.

• 1 die erfindungsgemäße Vorrichtung; und
• 2 das erfindungsgemäße Verfahren

veranschaulicht.Two figures are attached to the description, where

• 1 the device according to the invention; and
• 2 the method according to the invention

illustrated.

The invention is described in detail below with reference to the figures mentioned in the form of exemplary embodiments.

1 shows the device 100 according to the invention for aligning at least one lateral guide rail 20-1 ... 20-4 for the lateral delimitation of a transport path for, in particular, a rolled product through a roll stand 40. The roll stand 40 is shown in 1 abstracts to its center line, i.e. the longitudinal alignment of its reels. This center line runs transversely to the transport direction T of the rolling stock. The transport direction is in 1 also indicated by arrows from left to right.

Each individual lateral guide 20-1 ... 20-4 is controlled in an articulated manner by at least two actuators A1 ... A8. With these actuators, the lateral guide can be adjusted or aligned in its angle to the transport direction and it is transverse to the transport direction, d. H. into or out of the transport path. Each actuator A1 . . . A8 is assigned a position sensor S1 . . . S8 for detecting the current position of the assigned actuator. The individual actuators are controlled by a control device 120 which, according to the invention, is programmed to carry out the method according to the invention. The sensors S1 . . . S8 report the respectively detected positions of the actuators back to the control device. The device 100 according to the invention includes the actuators, the position sensors and the control device. The lateral guide rails 20-1 ... 20-4 and the roll stand 40 are not part of the device according to the invention.

The method according to the invention 2 used to align the lateral guides or to calibrate the actuators that control the lateral guides. In 2 the term "cylinder" stands for "actuator". It envisages the following steps: In a variant that is not shown, the calibration can also be carried out using inserts.

First, the straight-line transport route for a product and the central axis of the transport route are defined. For this purpose, a first reference point X and a second reference point Y, both of which should lie on the central axis of the transport route, are defined. The central axis itself is then preferably defined by aligning a laser beam as a reference axis along the central axis of the path defined by the two reference points X and Y; see process step 1 - 3 in 2 . The first reference point X is preferably defined in the region of the start of a lateral guide, while the second reference point Y is preferably defined at the end of a lateral guide Y so that the two reference points X, Y are as far apart as possible. The greater the distance, the more precisely the transport route can be defined.

Step 4 of the method then provides that all lateral guides 20-1 ... 20-4 are moved to a maximum opening dimension, ie their actuators A1 ... A8 are moved to their respective individual minimum extended position. In this minimum extended position, the lateral guide rails are each at a maximum distance from the central axis of the transport path. During step 3 of the method according to 2 in any case, can only occur after steps 1 and 2, step 4 can also occur at any time before steps 1, 2 or 3 or during the execution of those steps. The method according to the invention is only necessary because typically not all actuators are pre-assembled at exactly the same distance from the central axis of the transport path and/or because they have inherent inaccuracies in positioning or in their individual minimum extension positions.

After all lateral guides 20-1 ... 20-4 have been moved to their minimum extended position, according to method step 5, the respective right-angled distances ai from at least 2 measuring points i with i≥2 per lateral guide 20-1 ... 20-4 the central axis of the transport route is determined. The measurement points each represent the pivot points of the actuators A1...A8 on the lateral guide rails. Ideally, the measuring points are in the middle of the pivot points; In practice, the measurement points can also be selected on the inside of the respective lateral guide rails, preferably with the shortest distance from the respective associated pivot points. For reasons of a uniform measurement result, however, it makes sense if the measurement points are always determined in the same way on all cornering guides.

After the determination of the individual individual right-angled distances, the calculation or determination of their minimum takes place in method step 6, preferably averaged over all actuators and cornering guides. According to method step 7, a calibration stroke or offset value that is individual for each actuator is then determined according to the formula $$\Delta \text{i}=\text{hey}-\text{amine}$$

At the end of the method, according to method step 8, the calibration of the actuators A1 . According to the invention, this change can be implemented either by extending the actuators by their individual calibration stroke or by lengthening the actuator with shims, i. H. Spacers at the height of the calibration stroke Δi or by a proportionate combination of both procedures.

As a result, this procedure ultimately brings about a parallel alignment and equal spacing of each individual lateral guide ruler to the central axis of the transport path, especially in the calibrated extended position of all actuators.

Advantageously, this method can be used for a wide variety of transport routes, i. H. for a wide variety of constellations of lateral guides in relation to a roll stand. Below are some examples.

In this case, lateral guides on the entry side of a roll stand are referred to as entry side guides and lateral guides on the exit side of a roll stand are referred to as exit side guides.

1st example:

At least one inlet side guide ruler 20-2 is provided on at least one side along the inlet in front of the roll stand 40, viewed in the transport direction (T). The transport route means the entry in front of a roll stand. Both reference points X, Y are preferably in front of the roll stand 40. The first reference point X is further away from the roll stand than the second reference point Y.

2nd example:

At least one inlet side guide ruler 20-2 is provided on at least one side along the inlet in front of the roll stand 40, viewed in the transport direction T. The transport path means the entry and the passage of the rolling stock 40 through the roll gap of the roll stand. The first reference point X is preferably located at the start of the entry side guide bar or the entry side guide bars and the second reference point Y is behind the roll stand.

3. Example:

At least one outlet side guide ruler 20-4 is provided on at least one side along the outlet behind the roll stand 40, viewed in the transport direction T. The transport route means the passage through the nip of the roller stand 40 and the outlet from the roll stand 40. The first reference point X is preferably in front of the roll stand 40 and the second reference point Y is behind the roll stand, preferably at the end of the at least one outlet side guide rail 20-4.

4. Example:

At least one outlet side guide ruler 20-4 is provided on at least one side along the outlet behind the roll stand 40, viewed in the transport direction T. The transport path means the outlet from roll stand 40. Both reference points X, Y are preferably located behind roll stand 40, with the first reference point X preferably being provided at the beginning of the at least one outlet side guide rail and the second reference point Y preferably being provided at the end of the at least one outlet side guide rail.

5. Example:

At least one inlet side guide 20-2 is - seen in the transport direction T - on at least one side along the inlet in front of the roll stand 40 and at least one outlet side guide 20-4 is - seen in the transport direction T - on at least one side along the outlet behind the roll stand 40 . The transport route means the entry in front of the roll stand 40, the passage through the roll stand and the exit from the roll stand. The first reference point X is in front of the roll stand, preferably at the beginning of the entry side guide rail and the second reference point Y is behind the roll stand 40, preferably at the end of the exit side guide rail 20-4.

The actuators are preferably controllable hydraulic cylinders.

Reference List

20-1... 20-4

side guide ruler

40

mill stand

100

contraption

120

control device

A1...A8

actuators

S1...S8

position sensors

T

Transport direction, transport route

X

first reference point

Y

second reference point

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

• EP 3365120 B1 [0002]

Claims (10)

Method for aligning at least one lateral guide (20-1 ...20-4) for laterally delimiting a transport path for a product, in particular a rolling stock to be rolled, through a roll stand (40), the lateral guide (20-1 ...20 -4) with the aid of at least two actuators (A1 ... A8), which are articulated on the outside at at least two points of application on the lateral guide rail, can be moved transversely to the transport path into and out of the latter; comprising the following steps: defining the central axis of the transport path; Process all actuators (A1 ... A8) of the lateral guide (20-1 ... 20-4) in their respective minimum extended position, so that the lateral guide is at a maximum distance from the center axis of the transport path; Determination of the right-angled distances ai from at least two measuring points i with i≥2 per cornering ruler (20-1 ...20-4) to the central axis when the actuators are moved to their respective minimum extended position, with the measuring points each being the pivot points of the actuators (A1...A8) on the side guides; determining the minimum amin of the determined perpendicular distances; Calculation of an individual calibration stroke Δi for each of the i actuators with i≥2 as follows: Δi = ai - amin; and Calibrating the actuators (A1 . . . A8) by changing their extended position - starting from their respective minimum extended position - by their respective individual calibration stroke Δi into a calibrated extended position. procedure after claim 1 , characterized in that the at least two actuators A1 ... A8) offset in the longitudinal direction of the transport path or the lateral guide bar are articulated on the lateral guide bar (20-1 ... 20-4). A method according to any one of the preceding claims; characterized in that the step of defining the central axis of the transport path comprises the following sub-steps: determining a first reference point (X) and a second reference point (Y), both of which should lie on the central axis, for defining the central axis; and preferably aligning a laser beam as a reference axis along the central axis of the transport path defined by the two reference points (X, Y). procedure after claim 3 ; characterized in that at least one inlet side guide rail (20-2) is provided on at least one side along the inlet in front of the roll stand (40), viewed in the transport direction (T); that the transport route means the entry in front of a roll stand; that preferably both reference points (X, Y) are in front of the roll stand (40); and that the first reference point (X) is farther from the roll stand than the second reference point (Y). procedure after claim 3 ; characterized in that at least one inlet side guide rail (20-2) is provided on at least one side along the inlet in front of the roll stand (40), viewed in the transport direction (T); that the transport path means the entry and the passage of the rolling stock (40) through the roll gap of the roll stand; and that - seen in the direction of transport of the rolling stock (40) - preferably the first reference point (X) is at the start of the entry side guide rail and the second reference point (Y) is behind the roll stand. procedure after claim 3 ; characterized in that at least one outlet side guide rail (20-4) is provided on at least one side along the outlet behind the roll stand (40), viewed in the transport direction (T); that the transport path means the passage through the roll gap of the roll stand (40) and the exit from the roll stand (40); and that - viewed in the transport direction of the rolling stock - the first reference point (X) is preferably in front of the roll stand (40) and the second reference point (Y) is behind the roll stand, preferably at the end of the at least one outlet side guide rail (20-4). procedure after claim 3 ; characterized in that at least one outlet side guide rail (20-4) is provided on at least one side along the outlet behind the roll stand (40), viewed in the transport direction (T); that the transport route means the exit from the roll stand (40); and that both reference points (X, Y) are preferably located behind the roll stand (40), the first reference point (X) preferably being provided at the start of the at least one outlet side guide rail and the second reference point (Y) preferably being provided at the end of the at least one outlet side guide rail. procedure after claim 3 ; characterized in that at least one inlet side guide ruler (20-2) - seen in the transport direction (T) - min at least one side along the inlet in front of the roll stand (40) and at least one outlet side guide bar (20-4) on - seen in the transport direction (T) - at least one side along the outlet behind the roll stand (40); that the transport path includes the entry in front of the roll stand (40), the passage through the roll stand and the exit from the roll stand; and that - seen in the direction of transport of the rolling stock - the first reference point (X) is in front of the roll stand, preferably at the start of the entry side guide rail, and the second reference point (Y) is behind the roll stand (40), preferably at the end of the outlet side guide rail (20-4). Method according to one of the preceding claims, characterized in that the change in the extended position of the at least one actuator to the calibrated extended position can be realized either by extending the actuators by their individual calibration stroke or by lengthening the actuator with shims or spacers in the amount of the calibration stroke Δi or by a proportionate combination of both approaches. Device (100) for aligning at least one lateral guide rule (20-1, 20-2, 20-3, 20-4) for the lateral delimitation of a transport path for a product, in particular a rolling stock to be rolled through a roll stand (40), having: at least two actuators (A1 ... A8) per lateral guide (20-1 ...20-4), one of which is articulated on the front and rear area of the lateral guide in the transport direction (T) of the rolling stock, for moving the lateral guide (20-1...20-4) into and out of the transport path (T) transversely to a predetermined position; preferably each of the actuators (A1...A8) assigned position sensors (S1...S8) for detecting the respective current position of the assigned actuator (A1...A8); and a control device (120) for controlling the actuators (A1 ... A8); characterized in that the control device (120) is designed, in particular programmed, to carry out the method according to one of the preceding claims.

Images