CN106132576A - For the method adjusting the smoothing roll of smoothing roll system - Google Patents

Abstract

nullThe present invention relates to a kind of be set up to aligning material is aligned for adjusting in the case of in view of at least one aligning material characteristic of aligning material、The method with at least one smoothing roll of the smoothing roll system of multiple smoothing roll，Wherein，Aligning material characteristic is determined by the model containing relatedness，Wherein，On the one hand each relatedness makes at least one measure at least one value obtained before of parameter and/or on the other hand make to be associated uniquely with the aligning material characteristic determined by the relation of the value derivation obtained before different measurement parameters，Wherein，The actual value measuring parameter or the actual relationship derived by the actual value of different measurement parameters are determined by least one test measurement，And wherein，Aligning material characteristic determines based on model in the following manner，I.e.，Selected aligning material characteristic associates with substantially suitable with the actual value of the determination the measuring parameter value measuring parameter，Or from by different measurement parameters value derive、Substantially suitable with the actual relationship determined relationship.

Description

Method for adjusting straightening rollers of a straightening roller system

technical field

The invention relates to at least one adjustable straightening roller system with a plurality of straightening rollers set up to straighten straightening material, taking into account at least one straightening material characteristic of the straightening material. Adjustment of the straightening roller method.

Background technique

During straightening rolling of straightening material, for example in the form of plates, strips, panels, profiles, beams, etc., inherent stresses and flatness errors are removed from the straightening material by the reverse bending of the straightening material. For this purpose, an optimal adjustment of the individual straightening rollers of the straightening roller system is a particular challenge, especially since this adjustment depends on the respective system geometry and the corresponding straightening material properties.

The existing accessories for controlling the adjustment of the straightening rollers mainly measure the flatness of the straightening material flowing out of the straightening roller system and control the adjustment of the straightening rollers based on the measured flatness. The disadvantage here is that the straightening material section located in the straightening roller system is not straightened taking into account its straightening material properties, but the straightening material section that left the straightening roller system last Straightening is carried out under the condition of the straightening material characteristics. Consequently, fluctuations occurring in the straightening material properties of a straightening material section are only picked up when the straightening material section has completely passed through the straightening roller system. Therefore, especially the initial section of the straightening material is straightened to a certain extent without knowing its exact straightening material properties, which is associated with a relatively high risk of rejects. Overall, therefore, in this type of control it can occur that the straightened material is not straightened optimally, which leads to an increase in rejects.

Publication "Voraussetzungen und für die automatisierte Anstellung von Rollenrichtmaschinen unter Anwendung von Mikrorechnern" It is known that the process parameters are determined by the forces acting on the straightening rolls, the process parameters are improved and the parameters for adjusting the straightening rolls are determined from the process parameters by means of a mathematical model of the straightening process Correction values, whereby a technically optimal control of the used straightening roller system is achieved during the straightening process.

EP 0 946 312 B1 describes a method for the adjustment of at least one straightening roller of a straightening roller system and the continuously measured data of the corresponding straightening material without delay and automatically without stopping the straightening process. method of matching.

Contents of the invention

The object of the present invention is to enable optimal straightening of straightening material and to reduce waste when straightening the straightening material.

This object is achieved by the independent claims. Advantageous refinements are given in the subclaims, which can each represent aspects of the invention on their own or in different combinations with one another.

According to the invention for adjusting at least one straightening roller system with a plurality of straightening rollers set up to straighten straightening material, taking into account at least one straightening material property of the straightening material, at least one adjustable Method for straightening rolls, determining straightening material properties from a model containing correlations, wherein each correlation on the one hand results in at least one previously acquired value of at least one measured parameter and/or on the other hand results in different measurements A relationship derived from a previously acquired value of a parameter is uniquely associated with the determined straightening material property, wherein the actual value of the measured parameter is determined or an actual relationship derived from the actual value of a different measured parameter is determined by means of at least one test measurement, and In this case, the straightening material properties are determined by the model in that the selected straightening material properties are associated with values of the measured variables that substantially correspond to the determined actual values of the measured variables, or the selected straightened material properties It is associated with a relationship derived from the values of the various measured parameters that essentially corresponds to the determined actual relationship.

According to the invention, instead of directly measuring the straightening material quality of the straightening material to be straightened, at least one straightening material quality of the straightening material to be straightened can be determined from a previously established model, wherein each straightening material The characteristic is uniquely associated with at least one acquired value of at least one measured variable and/or with a relationship derived from previously acquired values of a different measured variable. This determination of the properties of the straightening material to be taken into account during the straightening process can be realized with very low computing power and can therefore also be performed "on-line" during the straightening process. An association can be selected by comparing the actual value or actual relationship with the value or relationship contained in the model, which value or relationship is equivalent to the actual value or actual relationship. The straightening material properties contained in the corresponding association are thus automatically selected. The relationship may be provided by a two-dimensional function or a multidimensional function or at least partially given properties of such a function.

A model can be an analytical model or a numerical model. The reference point can be calculated in the numerical model and subsequently described by means of a multidimensional regression function. The analytical model and the numerical model can each be set up to obtain at least one previously acquired value of at least one measured variable on the one hand and/or relationships derived from previously acquired values of different measured variables on the other hand and to make the at least one measured variable At least one previously acquired value of , and/or, on the other hand, a relationship derived from previously acquired values of different measurement variables are uniquely linked to the determined straightening material property, for which purpose a finite element method can be used, for example. The correlations included in the model can be determined empirically from corresponding measurement campaigns with the aid of a straightening roll system or of identically or similarly constructed straightening roll systems or with the aid of a separate test device specially provided for this purpose . A model can also be an online model or an offline model. The model can comprise a database containing therein the associations in the form of process characteristic curves which respectively describe the respective straightening material properties with previously acquired values of at least one measured parameter on the one hand and/or on the other hand by The unique interrelationship of the relationship derived from the previously acquired values of the different measurement parameters. A process characteristic curve of this type can be included in the database for each of the different straightening processes that can be performed with the straightening roller system. Alternatively, the model may comprise a lookup table contained in the database containing the associations. Building the database can be achieved before performing the other steps of the method according to the invention.

The properties of the straightened material may be, for example, the initial curvature of the straightened material to be straightened, the elastic modulus of the straightened material to be straightened, the yield limit of the straightened material to be straightened, and the like.

Two or more, in particular all, adjustable straightening rollers of the straightening roller system can also be adjusted accordingly by means of the method according to the invention. With the aid of the method according to the invention, once the straightening material to be straightened enters the straightening roller system, the straightening rollers can be adjusted in particular to an optimum adaptation to the respective straightening material properties of the straightening material to be straightened System of straightening rollers. Straightening material can thus be straightened optimally from the start. Thus, according to the method according to the invention an optimal straightening of the straightening material can be achieved and waste products during straightening in the form of insufficiently straightened straightening material are reduced.

If a section of straightening material to be straightened with unknown straightening material properties is passed through the straightening roller system, as can occur in the prior art explained above, it may occur that the section wedges into the straightening roller system, This relates to outages or limited availability of the straightening roller system. This wedging of the section of the straightening material to be straightened can be prevented by the method according to the invention, because the straightening material properties of the straightening material to be straightened can be adjusted before straightening or directly after the start of straightening. The point at which the straightening material is to be straightened is determined and can be taken into account for optimal adjustment of the straightening rollers of the straightening roller system.

The test measurements can be carried out by means of at least one straightening roller of the straightening roller system and the adjustment device associated with the straightening roller and/or by means of a test device placed upstream of the straightening roller system or separately. The test rig may reproduce at least a portion of the straightening roll system or otherwise be configured.

According to an advantageous refinement, the torque produced by the selected straightening rollers of the straightening roller system during the straightening operation of the straightening roller system, during the test adjustment of the selected straightening rollers up to the corresponding straightening rollers The force acting on the selected straightening rollers until a predetermined immersion depth is reached in the material and/or during the test adjustment of the selected straightening rollers until a predetermined immersion depth is reached in the corresponding straightened material The adjustment travel of the straight rollers is used as a measurement parameter. Alternatively or additionally, instead of the force acting on the selected straightening roller during the test adjustment of the selected straightening roller until a predetermined penetration depth is reached in the corresponding straightening material, the force acting on the selected straightening roller can be used here. The force of at least one straightening roller, which interacts with the selected straightening roller and which is arranged on the opposite side of the straightening material to be straightened, is used as the measured variable. The selected straightening rollers can be arranged with respect to the mass flow direction in the end region of the straightening roller system, preferably in the middle region of the straightening roller system, or particularly preferably in the starting region. The test adjustment is to adjust the selected straightening roller, which is not used to straighten the straightening material to be straightened, but for the subsequent adjustment of at least one straightening roller of the straightening roller system (this straightening roller can also be an optional straightening roller) straightening roller itself) in order to straighten the straightened material to be straightened. The corresponding predetermined penetration depth can be determined taking into account the elastic and/or plastic deformability of the straightening material to be straightened. The force and the adjustment travel can be determined, for example, by a linked force-adjustment travel measurement, from which a force-adjustment travel dependence can be derived. The test adjustment can be performed before straightening, directly at the start of straightening or during an interrupted pause in the straightening process. The latter can be used to check whether the completed adjustment of at least one straightening roller of the straightening roller system can be maintained or has to be changed.

According to a further advantageous refinement, the relationship derived from the values of the different measured variables is formed by a comparison function, which is derived from the corresponding values of the different measured variables by means of an adjustment calculation, wherein the actual values of the different measured variables The derived actual relationship is formed by an actual comparison function, which is derived from the corresponding actual values of the different measured variables by means of an adjustment calculation. For example, regression calculations or curve fitting methods can be used as adjustment calculations. According to this refinement, therefore, instead of comparing the individual values with one another, the functions or the parameters describing them are compared with one another in order to select a correlation from the model.

Another advantageous refinement provides that the relationship or actual relationship is derived from the following value or actual value: the value or actual value for the adjustment stroke of the selected straightening roller, for which the adjustment stroke acts on the selected adjustment during the test adjustment. The force on the straightening rollers and/or the straightening rollers acting with the selected straightening rollers deviates from zero value; during the test adjustment to the selected straightening rollers and/or the straightening rollers acting with the selected straightening rollers The value or actual value of the force on the roller, from which the straightening material to be straightened is plastically deformed; and the force-stroke-curve derived from the combined force-adjustment stroke-measurement during the test adjustment in the straightening to be straightened The value or actual value of the slope in the region of the straightened material that deforms only elastically. In this force-travel measurement, the force acting on the selected straightening roller is detected as a function of the adjustment travel of the selected straightening roller. In practice, a tolerance is provided for the zero value of the force, so that the value or the actual value of the adjustment travel of the selected straightening roller is obtained only when the selected straightening roller is actually in contact with the straightening material to be straightened. If the zero value is not toleranced, for example due to vibrations in the straightening roller system, it may occur that the corresponding value or the actual value is incorrectly acquired, this must be prevented.

Furthermore, it is considered advantageous to use as the selected straightening roller the straightening roller which first comes into contact with the straightening material to be straightened on the entry side of the straightening roller system. Thus, at least one property of the straightening material can be determined as early as possible, in particular before starting to straighten the straightening material to be straightened, by means of the straightening roller system itself, which leads to a reduction in scrap during straightening and the straightening roller system Improved usability.

According to a further advantageous refinement, at least one straightening roller is adjusted taking into account the thickness of the straightening material to be straightened. The thickness of the straightening material to be straightened can be detected individually by the straightening roller system by means of a suitable detection device, for example a laser-based thickness measurement system. The thickness of the straightening material to be straightened is an important adjustment parameter for optimal adjustment of the straightening rollers of the straightening roller system.

Advantageously, the straightening material properties are determined before starting the straightening operation of the straightening roller system or when starting the straightening operation of the straightening roller system. The latter means the online determination of the properties of the straightening material, so that the straightening roller system does not have to be shut down for this. This increases the productivity of the straightening roll system.

Another advantageous refinement provides that during the straightening operation of the straightening roller system, certain straightening material properties are monitored, wherein, when a deviation is found between the actual straightening material properties and the determined straightening material properties, a readjustment of at least Adjustment of a straightening roller. Straightening material properties can be monitored over the entire length of the straightening material to be straightened. This refinement of the method is advantageous since the straightening material properties of the straightening material to be straightened often vary. According to this refinement of the method, this situation can be taken into account in order to optimally adjust the straightening rollers of the straightening roller system.

According to a further advantageous refinement, during the straightening operation of the straightening roller system, the modulus of elasticity of the straightening material to be straightened located in the straightening roller system is determined by the corresponding current torque generated by the straightening roller and by the The yield limit of the straightening material to be straightened is derived from the force acting in each case on the straightening rollers. Accordingly, the straightened material properties, ie the modulus of elasticity, of the straightened material straightened during the straightening operation can be determined without the straightening roller system being stopped. The determined modulus of elasticity can be used to adjust the corresponding adjustment of the straightening rollers. The rotational speed of the individual straightening rollers can be adjusted, taking into account the corresponding adjustment of the straightening rollers, in order to reduce to a large extent the contact between the straightening material to be straightened and the straightening rollers in the straightening material to be straightened. Or mechanical stress due to the corresponding torque of the straightening rollers.

Another advantageous refinement provides that the correlations included in the model are determined by previous measurements of the straightening material to be straightened, wherein by means of a straightening roller system, identically configured straightening roller systems or separate tests The device performs measurements at different straightening materials. Accordingly, the model contains empirically determined correlations. It is possible to generate further correlations from current actual measurements and store them in the model.

The computer program according to the present invention includes a program code segment stored on a computer-readable data carrier. When the program code segment is implemented on a computer or a corresponding computing unit, it causes the computer or a corresponding computing unit to execute the One or any combination of the above design schemes. The advantages mentioned above with respect to the method apply correspondingly to the computer program.

A data carrier according to the invention comprises the computer program mentioned above. The advantages mentioned above with respect to the method apply correspondingly to the data carrier.

Accordingly, the computer system according to the invention is characterized in that the above-mentioned computer program is loaded onto the computer system. The advantages mentioned above with respect to the method apply correspondingly to the computer system.

Description of drawings

The invention is explained below by way of example on the basis of preferred exemplary embodiments with reference to the drawings, wherein the features shown below can represent the solution of the invention not only individually but also in various combinations with one another. in:

Figure 1 shows an exemplary force-stroke-diagram derived from the force-stroke-measurement according to the invention, and

Fig. 2 shows the flow of an embodiment of the method according to the invention.

detailed description

FIG. 1 shows an exemplary force-travel diagram derived from the force-travel measurement according to the invention. The adjustment travel s is plotted on the abscissa, and the force F acting on the selected straightening roller for the force-travel measurement is plotted on the ordinate. At the adjustment stroke s ₀ , the force F acting on the selected straightening roller can be zero (with a certain tolerance). The slope of the force-distance curve 1 derived from the force-distance measurement in the approximately linear range of the force-distance curve 1 when the selected straightening roller begins to sink into the corresponding straightening material is indicated by m _el , wherein, in this linear region, the straightening material to be straightened deforms elastically. The force F _pl represents the force acting on the selected straightening roller from which the approximately linear region of the force-stroke-curve 1 transitions into the non-linear region of the force-stroke-curve 1 in which In the region, the straightened material to be straightened is plastically deformed.

Fig. 2 shows the flow of an embodiment of the method according to the invention. In step 10, at least one measurement parameter and/or at least one value of two or more measurement parameters is acquired. In step 20, correlations are established, wherein each correlation combines on the one hand at least one previously acquired value of at least one measurement parameter and/or on the other hand a relationship derived from previously acquired values of different measurement parameters with The determined straightening material properties are uniquely associated. In step 30, the association is stored in the model in the form of at least one process characteristic curve.

In step 40 , at least one measured parameter and/or at least one actual value of two or more measured parameters is acquired, or an actual relationship derived from acquired actual values of different measured parameters is determined. In step 50, in order to determine from the model which straightening material properties should be taken into account when straightening the straightening material to be straightened according to the plan, the acquired actual values or actual relationships are matched with the correlations contained in the model by , that is, the selected straightening material property is associated with a value of the measured parameter that substantially corresponds to the determined actual value of the measured parameter, or the straightened material property is correlated with a value derived from a different measured parameter that is substantially A relational association commensurate with an identified actual relation. In step 60, the straightening material properties selected in step 50 are used to adjust the straightening rollers of the straightening roller system. The dashed lines in FIG. 2 represent experimental measurements for determining actual values or actual relationships, for which the ongoing straightening process is briefly interrupted. This experimental measurement can be used to update or supplement the model.

List of reference signs

1 Force-stroke-curve

10 steps

20 steps

30 steps

40 steps

50 steps

60 steps

Claims (13)

1. At least one straightening roller system with a plurality of straightening rollers for adjusting the straightening roller system set up to straighten the straightening material by taking into account at least one straightening material characteristic of the straightening material Method for straightening rolls, wherein the straightening material properties are determined by a model containing correlations, wherein each correlation differs on the one hand at least one previously acquired value of at least one measured parameter and/or on the other hand differs by A relationship derived from a previously acquired value of a measurement parameter is uniquely associated with the determined straightening material property, wherein the actual value of the measurement parameter or the actual relationship derived from the actual value of a different measurement parameter is determined by at least one test measurement , and wherein the straightening material properties are determined by the model in such a way that the selected straightening material properties are associated with values of the measured parameters that substantially correspond to the determined actual values of the measured parameters, Or associated with a relationship derived from the values of different measured parameters that substantially corresponds to the determined actual relationship. 2. The method according to claim 1, characterized in that the torque generated by the selected straightening rollers of the straightening roller system during the straightening operation of the straightening roller system is compared to the selected straightening roller The force acting on the selected straightening rollers during the test adjustment of the rollers until a predetermined immersion depth in the corresponding straightening material is reached and/or during the test adjustment of the selected straightening rollers until in the corresponding straightening material The adjustment travel of the selected straightening rollers until the predetermined penetration depth is reached is used as a measurement variable. 3. The method according to claim 1 or 2, characterized in that the relationship derived from the values of the different measurement parameters is formed by means of a comparison function which is derived from the corresponding values of the different measurement parameters by means of an adjustment calculation , wherein the actual relationship derived from the actual values of the different measurement variables is formed by an actual comparison function, which is derived from the corresponding actual values of the different measurement variables by means of an adjustment calculation. 4. The method as claimed in claim 2 or 3, characterized in that the relationship or actual relationship is derived from the following value or actual value: the value or actual value (s ₀ ) of the adjustment stroke of the selected straightening roller, in which The force acting on the selected straightening roller and/or the straightening roller cooperating with the selected straightening roller during the test adjustment deviates from zero value at the adjustment stroke; during the test adjustment on the selected straightening roller and/or The value or actual value (F _pl ) of the force on the straightening roller coacting with the selected straightening roller, from which force the straightening material to be straightened is plastically deformed; and by the combined force-adjustment stroke-measurement The value or actual value (m _el ) of the slope of the force-adjustment travel curve (1) derived during the test adjustment in the region of only elastic deformation of the straightening material to be straightened. 5. The method according to any one of claims 2 to 4, characterized in that the straightening roller which first comes into contact with the straightening material to be straightened on the entry side of the straightening roller system is used as the selective Straightening rollers. 6. The method as claimed in claim 1, characterized in that the at least one straightening roller is adjusted taking into account the thickness of the straightening material to be straightened. 7. The method according to any one of claims 1 to 6, characterized in that the straightening material properties are determined before the straightening operation of the straightening roller system or at the start of the straightening operation. 8. The method according to any one of claims 1 to 7, characterized in that the determined straightening material properties are monitored during the straightening operation of the straightening roller system, wherein after the actual straightening material properties are found In the event of deviations from defined straightening material properties, the setting of the at least one straightening roller is readjusted. 9. The method according to any one of claims 1 to 8, characterized in that during the straightening operation of the straightening roller system, the current torque generated by the straightening rollers and the The yield limit of the straightening material to be straightened, which is derived from the corresponding force acting on the straightening rollers, results in the modulus of elasticity of the straightening material to be straightened in the straightening roller system. 10. The method according to any one of claims 1 to 9, characterized in that the correlations included in the model are determined from previous measurements of the straightening material to be straightened, wherein by means of the straightening The roller system or an identically constructed straightening roller system performs measurements on different straightening materials. 11. A computer program having program code segments stored on a computer-readable data carrier which, when implemented on a computer or a corresponding computing unit, cause the computer or a corresponding computing unit to execute A method according to any one of claims 1 to 10. 12. A data carrier having a computer program according to claim 11. 13. A computer system on which the computer program according to claim 11 is loaded.