TW202021683A - Pressure simultation system and control method of a rolling machine - Google Patents

Abstract

A pressure simulation system and a control method of a rolling machine are provided. The pressure simulation system includes a pressure sensing plate and a computer device. The control method includes an offline pressure simulation stage and an online rolling stage. In the offline pressure simulation stage, at first, the pressure sensing plate is disposed between an upper roller and a lower roller of a roller set. Then, the roller set is controlled to roll the pressure sensing plate at a predetermined pressure to enable the pressure sensing plate to output plural pressure sensing signals. Thereafter, a pressure distribution relation is established in accordance with the pressure sensing signals, and a pressure value of the roller set is calculated in accordance with the pressure distribution relation. Then, the online rolling stage is performed to control roller set to roll a metal material (such as a steel strip) in accordance with the pressure value.

Description

Pressure simulation system and control method of roll mill

The present invention relates to a pressure simulation system and control method of a rolling mill, and particularly relates to a pressure simulation system and control method of a degreasing roller.

Generally speaking, when the cold rolling mill is used to produce steel strip, the oil removal roller of the rolling mill is usually used to remove the oil and water on the steel strip. For example, use a degreasing roller to wring out the oil and water on the steel belt. The degreasing effect of the steel strip will directly affect the production efficiency and quality of the rolling mill. If the degreasing effect of the steel strip is not good, the rolling speed cannot be increased, and the surface of the downstream steel strip will have oil glue defects. Among them, the steel coils with serious oil glue defects will be shaved by the downstream, and slight oil glue defects The steel coils will be converted to inferior products.

However, the current degreasing method still cannot reliably wring the oil and water on the steel belt. Therefore, a pressure simulation system and control method of the roller mill is needed to improve the degreasing effect of the degreasing roller.

One aspect of the present invention is to provide a pressure simulation system for a roll mill. This pressure simulation system includes a pressure sensor chip and a computer device. The pressure sensing sheet is arranged between the upper roll and the lower roll of the roll set. When the upper roll rolls the pressure sensing sheet with a preset pressure value, the pressure sensing sheet can output a plurality of pressure sensing sheets accordingly. Test signal. The computer device is used to obtain the pressure distribution relationship of the roll set according to the pressure sensing signal, and calculate the online working pressure value of the roll set according to the pressure distribution relationship.

According to an embodiment of the present invention, the computer device is electrically connected to the pressure sensor sheet through a wired or wireless method.

According to an embodiment of the present invention, the step of calculating the online working pressure value of the roll set by the computer device includes: when the pressure distribution relationship shows that there is a gap in the center of the roll set and there is no gap at the edge of the roll set, the computer device sets The online working pressure value is a low pressure value, where the low pressure value is less than the aforementioned preset pressure value.

According to an embodiment of the present invention, the step of calculating the online working pressure value of the roll set by the computer device includes: when the pressure distribution relationship shows that there is no gap at the center of the roll set and there is a gap at the edge of the roll set, the computer device sets The online working pressure value is a high pressure value, wherein the pressure value is greater than the aforementioned preset pressure value.

According to an embodiment of the present invention, the upper roller and the lower roller are degreasing rollers.

One aspect of the present invention is to provide a control method of a rolling mill. In this control method, the offline pressure simulation stage is first performed. In the offline pressure simulation stage, first set the pressure sensing piece on the rolls above the roll set And between the lower rolls. Then, the roller group is controlled to roll the pressure sensing sheet with a preset pressure value, so that the pressure sensing sheet outputs a plurality of pressure sensing signals accordingly. Then, the pressure distribution relationship of the roll set is obtained according to the pressure sensing signal, and the online working pressure value of the roll set is calculated according to the pressure distribution relationship. Then, the on-line rolling stage is carried out to control the roll set to roll metal materials according to the calculated on-line working pressure value.

According to an embodiment of the present invention, the metal material is a steel strip.

According to an embodiment of the present invention, the step of calculating the online working pressure value of the roll set includes: when the pressure distribution relationship shows that there is a gap in the center of the roll set and there is no gap at the edge of the roll set, the computer device sets the online work The pressure value is a low pressure value, where the low pressure value is less than the aforementioned preset pressure value.

According to an embodiment of the present invention, the step of calculating the online working pressure value of the roll set includes: when the pressure distribution relationship shows that there is no gap at the center of the roll set and there is a gap at the edge of the roll set, the computer device sets the online work The pressure value is a high pressure value, wherein the pressure value is greater than the aforementioned preset pressure value.

According to an embodiment of the present invention, the upper roller and the lower roller are degreasing rollers.

100‧‧‧Suspended system

110‧‧‧roller set

112‧‧‧Upper Roll

114‧‧‧Bottom Roll

120‧‧‧roller set

120a‧‧‧Central Office

120b‧‧‧Edge

122‧‧‧Upper Roll

124‧‧‧Lower Roll

122c‧‧‧Second end

130‧‧‧Computer device

140‧‧‧Detection device

150‧‧‧Coiler

200‧‧‧Roller control method

210‧‧‧Offline pressure simulation stage

212, 214, 216‧‧‧ steps

216a~216e‧‧‧Step

220‧‧‧On-line rolling stage

DP‧‧‧Pressure sensor

G‧‧‧Gap

SP‧‧‧Steel belt

In order to make the above and other objects, features, advantages and embodiments of the present invention more obvious and understandable, the detailed description of the attached drawings is as follows: [Fig. 1] is a schematic diagram showing a simple structure of a rolling mill according to an embodiment of the present invention; [Fig. 2a] is a schematic flow diagram showing a control method of a rolling mill according to an embodiment of the present invention; [Fig. 2b] is a schematic diagram showing according to the present invention Schematic diagram of the process of establishing the pressure distribution relationship of the roll set in the embodiment of the present invention; [Figure 3] is a schematic flow diagram showing the control method of the roll machine according to an embodiment of the present invention; [Figure 4] is a diagram illustrating the roll set according to the embodiment of the present invention The enlarged view of the center and the edge; and [FIG. 5] is an enlarged view of the center and the edge of the roll set according to the embodiment of the present invention.

Regarding the "first", "second", ... etc. used in this text, it does not specifically refer to the order or sequence, but only to distinguish elements or operations described in the same technical terms.

Please refer to FIG. 1, which is a schematic diagram of a simple structure of a roll mill 100 according to an embodiment of the present invention. The rolling mill 100 includes a plurality of rolling groups 110 and 120 and a computer device 130. The roll sets 110 and 120 are degreasing rolls, which are used to wring the oil and water on the steel strip SP. In this embodiment, the roll sets 110 and 120 respectively have upper rolls 112, 122 and lower rolls 114, 124, wherein the positions of the lower rolls 114, 124 are fixed, and the positions of the upper rolls 112, 122 are controlled by the computer device 130 , According to the pressure output by the computer device 130 The control signal moves up and down to apply pressure on the steel belt SP. After the steel strip SP is stranded and dried by the roller set 110, the detection device 140 detects the surface of the steel strip SP to determine the residual oil and water condition. Then, the coiler 150 will roll up the steel strip SP to form a steel coil.

In the above embodiment, the rolling mill 100 includes two roll sets 110 and 120, which are used to wring the oil and water on the steel strip SP, but the embodiment of the present invention is not limited to this. In other embodiments of the present invention, the roll mill 100 may include other roll sets of varying numbers, and may be used to wring oil and water on other metal materials.

Please refer to FIG. 2a, which is a schematic flowchart of a method 200 for controlling a roll mill according to an embodiment of the present invention. The rolling mill control method 200 includes an offline pressure simulation stage 210 and an online rolling stage 220. The offline pressure simulation stage 210 is to simulate the pressure of the roll sets 110 and 120 of the roll mill 100 when the roll mill 100 is offline. The following embodiment will use the roll set 120 as an example to illustrate the process of the offline pressure simulation stage 210. In this embodiment, the pressure simulation system includes a roll set 120, a pressure sensor, and a computer device 130, which is used to calculate the pressure value that the roll set 120 needs to apply when the steel strip SP is twisted.

In the offline pressure simulation stage 210, step 212 is first performed to set the pressure sensing sheet DP between the upper roller 122 and the lower roller 124 of the roller set 120, as shown in FIG. 3. Next, proceed to step 214 to control the roller set 120 to roll the pressure sensing sheet DP with a preset pressure value, so that the pressure sensing sheet DP outputs a pressure sensing signal to the computer device 130 accordingly. In this embodiment, software (such as Abaqus) can be used to simulate different roll sets. Nip under squeezing force, and observe whether there is a pressing condition. In this way, the aforementioned preset pressure value can be obtained and stored in the computer device 130. When step 214 is performed, the computer device 130 can output a pressure control signal to the roller set 120 to control the upper roller 122 to apply a preset pressure value on the pressure sensing sheet DP.

In this embodiment, the size of the pressure sensing sheet DP is the same as the aforementioned steel strip SP, so that the pressure sensing sheet DP can sense the pressure values of the roller set 120 at multiple rolling positions and output multiple pressure senses accordingly Test signal. However, the embodiments of the present invention are not limited thereto. In other embodiments of the present invention, the size of the pressure sensing sheet DP may be smaller than the steel strip SP. The pressure sensing sheet DP is arranged at a plurality of different rolling positions of the roll set 120 to perform multiple pressure sensing, and the pressure sensing signals of the roll set 120 at these rolling positions can also be obtained.

In addition, in order to prevent the pressure sensing sheet DP from being damaged by the roller set 120, the embodiment of the present invention uses the Hertz contact theory to calculate the maximum pressure after the upper roller 122 and the lower roller 124 are in contact. In this way, the user can select a suitable pressure sensing sheet DP according to the maximum stress value, so as to prevent the pressure sensing sheet DP from being damaged by the roller set 120.

Then, step 216 is performed to establish the pressure distribution relationship of the roll set according to the pressure sensing signal provided by the pressure sensing sheet DP, and calculate the online working pressure value of the roll set 120 according to the pressure distribution relationship. In this embodiment, the computer device 130 can establish the pressure distribution relationship according to the pressure sensing signal of the pressure sensing sheet DP and the corresponding rolling position, and determine whether the roller set 120 is rolling the pressure sensing sheet DP according to this There are gaps. For example, change The relationship between the pressure sensing value and the rolling position is plotted as a pressure curve. If the pressure sensing value drops sharply from a certain rolling position, it means that there is a gap near the rolling position.

Please refer to FIG. 2b, which is a schematic flowchart of step 216 according to an embodiment of the present invention. In step 216, step 216a is first performed to receive the pressure sensing signal provided by the pressure sensing sheet DP. Then, step 216b is performed to establish a pressure distribution relationship based on the pressure sensing signal. Then, step 216c is performed to determine whether there is a gap between the upper roller 122 and the lower roller of the roller set 120. If there is a gap, step 216d is performed to adjust the pressure value of the roll set 120. The following will illustrate how to adjust the pressure value of the roller set 120 in step 216d.

Please refer to FIG. 4, which is an enlarged view of the center 120a and the edge 120b of the roll set 120 according to an embodiment of the present invention. As shown in Figure 4, if the measured pressure distribution relationship shows that there is a gap G at the center 120a of the roll set 120 and there is no gap at the edge 120 of the roll set 120, it represents the rolling pressure sensing sheet DP of the roll set 120 The preset pressure value is too large. Therefore, the computer device 130 will control the roll set 120 again to make the roll set 120 roll the pressure sensing sheet DP with a lower pressure value, and perform steps 216a-216b again to establish a new pressure distribution relationship.

Please refer to FIG. 5, which is an enlarged view of the center 120a and the edge 120b of the roll set 120 according to an embodiment of the present invention. As shown in Figure 5, if the measured pressure distribution indicates that there is no gap at the center 120a of the roll set 120 and there is a gap G at the edge 120b of the roll set 120, it represents the prediction of the roll set 120 rolling pressure sensing sheet DP. The pressure value is too small. Therefore, the computer device 130 will then control the roll set 120 so that the roll set 120 rolls the pressure sensing sheet DP with a higher pressure value, and repeat steps 216a-216b to establish a new pressure distribution relationship.

In step 216, the computer device 130 will continuously adjust the pressure of the roll set 120 according to the pressure distribution relationship, until step 216d determines that there is no gap in the roll set 120. When there is no gap in the roll set 120, step 216e is performed to record the pressure value of the roll set 120 at this time, and set it as the online working pressure value of the roll set 120. In addition, in an embodiment of the present invention, step 216d can adjust the pressure value according to a plurality of steps with different sizes. For example, when the preset pressure value of the rolling pressure sensing sheet DP of the roll set 120 is too large, the computer device 130 may gradually reduce the pressure value of the roll set 120 according to the preset step pitch. At this time, the on-line working pressure value of the roll set 120 will be less than the preset pressure value. For another example, when the preset pressure value of the rolling pressure sensing sheet DP of the roll set 120 is too small, the computer device 130 may gradually increase the pressure value of the roll set 120 according to the preset step pitch. At this time, the on-line working pressure value of the roll set 120 will be greater than the preset pressure value.

Then, an online rolling stage 220 is performed to control the roll group 120 to roll the steel strip with the online working pressure value obtained in step 216 when working online.

In the embodiment of the present invention, by performing the offline pressure simulation stage 210 for each roll set (for example, the roll set 110, 120), the online working pressure value corresponding to each roll set can be obtained. These online working pressure values can be made into a look-up table and stored in the computer device 130. When the online rolling stage 220 is performed, the computer device 130 can quickly find the pair of roll sets through the lookup table. According to the line working pressure value, and control each roll group to perform degreasing operation accordingly.

It can be seen from the above description that the embodiment of the present invention uses the pressure sensing sheet DP to sense and simulate the pressure of the degreaser roller, and calculate the pressure value required by the degreaser roller to dry the belt, thereby increasing The degreasing effect of the degreasing roller avoids the defect of oil glue on the steel belt.

Although the present invention has been disclosed in several embodiments as above, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field to which the present invention belongs can make various modifications without departing from the spirit and scope of the present invention. Modifications and modifications, therefore, the scope of protection of the present invention shall be subject to those defined by the attached patent application scope.

200‧‧‧Roller control method

210‧‧‧Offline pressure simulation stage

212, 214, 216‧‧‧ steps

220‧‧‧On-line rolling stage

Claims (10)

A pressure simulation system for a rolling mill, comprising: a pressure sensing sheet, which is arranged between an upper roll and a lower roll of a roll set, wherein when the upper roll rolls the pressure sensor with a preset pressure value When measuring the sheet, the pressure sensing sheet correspondingly outputs a plurality of pressure sensing signals; and a computer device for establishing a pressure distribution relationship of the roll set according to the pressure sensing signals, and according to the pressure distribution relationship To calculate the working pressure value of one of the roll sets. For the pressure simulation system of the rolling mill described in the first item of the patent application, the computer device is electrically connected to the pressure sensing sheet through wired or wireless means. The pressure simulation system of the roll mill as described in the first item of the scope of patent application, wherein the step of calculating the on-line working pressure value of the roll set by the computer device includes: when the pressure distribution relationship shows a center of the roll set When there is a gap and there is no gap at the edge of the roll set, the computer device sets the on-line working pressure value to a low pressure value, wherein the low pressure value is less than the preset pressure value. Such as the pressure simulation system of the roll mill described in item 1 of the scope of patent application, wherein the computer device calculates the online work of the roll set The step of pressure value includes: when the pressure distribution relationship shows that there is no gap at the center of the roll set and there is a gap at one edge of the roll set, the computer device sets the working pressure value on the line to a high pressure value , Wherein the high pressure value is greater than the preset pressure value. The pressure simulation system of the rolling mill as described in item 1 of the scope of patent application, wherein the upper roller and the lower roller are degreasing rollers. A control method of a rolling mill includes: performing an offline pressure simulation stage, including: setting a pressure sensing sheet between an upper roller and a lower roller of a roller set; controlling the roller set to roll at a preset pressure value Rolling the pressure sensing sheet so that the pressure sensing sheet outputs a plurality of pressure sensing signals correspondingly; and establishing a pressure distribution relationship of the roll set according to the pressure sensing signals, and according to the pressure distribution relationship Calculating an online working pressure value of the roll set; and performing an online rolling stage to control the roll set to roll a metal material according to the online working pressure value. The control method of the roll mill as described in item 6 of the scope of patent application, wherein the metal material is a steel strip. The roll mill control as described in item 6 of the scope of patent application The method of manufacturing, wherein the step of calculating the on-line working pressure value of the roll set includes: when the pressure distribution relationship shows that there is a gap at the center of the roll set and there is no gap at the edge of the roll set, setting the The online working pressure value is a low pressure value, wherein the low pressure value is less than the preset pressure value. The method for controlling a roll mill as described in item 6 of the scope of patent application, wherein the step of calculating the on-line working pressure value of the roll set includes: when the pressure distribution relationship shows that there is no gap at the center of the roll set, and When there is a gap at one edge of the roll set, the working pressure value on the line is set to a high pressure value, wherein the high pressure value is greater than the preset pressure value. The control method of the roll mill as described in item 6 of the scope of patent application, wherein the upper roll and the lower roll are degreasing rolls.

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