An online automatic compensation system and compensation method for roller diameter of precision strip cold rolling mill

Abstract

The present invention provides an online automatic compensation system and compensation method for the roller diameter of a precision strip cold rolling mill. The compensation system includes a base, two sets of guide mechanisms, a roller frame, a lifting mechanism and a driving motor. The two sets of guide mechanisms are symmetrically arranged on the base; the roller frame is horizontally fixed to the top of the guide mechanism; an oil removal roller is fixed on the upper surface of the roller frame, the lifting mechanism is fixed on the base, and the lifting head of the lifting mechanism is connected to the lower surface of the roller frame; the lifting mechanism is connected to the driving motor through a transmission member, and the driving motor drives the lifting mechanism and drives the oil removal roller to move vertically up and down. During the use of the oil removal roller, the roller surface gradually wears and the roller diameter continues to decrease. After the roller diameter of the oil removal roller changes, the present invention adjusts the compensation amount required by the lifting mechanism in the height direction through real-time online compensation, so that the roller surface of the oil removal roller is adjusted to a position tangent to the rolling line, thereby quickly and accurately realizing online automatic compensation of the roller diameter.

Description

Technical Field

[0001] The invention belongs to the technical field of cold-rolled precision strip steel rolling, and in particular relates to an online automatic compensation system and compensation method for a precision strip cold rolling mill roll diameter. Background Art

[0002] During the cold-rolled precision strip rolling process, a roller degreasing device is installed before and after the rolling mill. The degreasing device removes the rolling fluid on the surface of the strip by rolling the roller on the surface of the strip. In recent years, degreasing rollers are increasingly made of non-metallic materials such as non-woven fabrics and high molecular polymers. The advantage of this type of material is that it has good adsorption of rolling fluid and has little impact on the surface quality of the strip. The disadvantage is that the roller surface has low hardness and poor wear resistance. During use, the roller surface will gradually become smaller due to wear. The reduction in roller diameter will cause the rolling line of the rolling mill to move down, and this downward movement will affect the surface quality of the finished strip. In large-scale uninterrupted production, in order to automatically maintain the rolling line of the rolling mill unchanged, it is necessary to invent an online automatic compensation system for the roller diameter of the precision strip cold rolling mill. Summary of the invention

[0003] In order to automatically maintain the rolling line of a rolling mill unchanged, the present invention provides an online automatic compensation system and compensation method for the roller diameter of a precision strip cold rolling mill.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] An online automatic compensation system for roller diameter of a precision strip cold rolling mill, comprising:

[0006] A base, mounted on the rolling mill;

[0007] The guide mechanism is provided with two groups, and the two groups of guide mechanisms are symmetrically arranged on the base;

[0008] A roller frame, horizontally and laterally fixedly connected to the top of the guide mechanism;

[0009] An oil removal roller is horizontally and transversely fixedly connected to the upper surface of the roller frame;

[0010] A lifting mechanism is fixed on the base, and a lifting head of the lifting mechanism is connected to the lower surface of the roller frame;

[0011] The driving motor is connected to the lifting mechanism through a transmission member, and the driving motor drives the lifting mechanism to make the oil removal roller move vertically up and down.

[0012] Furthermore, the lifting mechanism includes two lifts, which are symmetrically mounted on the base and respectively located outside the two sets of guide mechanisms.

[0013] Furthermore, the transmission member is a universal coupling, and the two elevators are connected via the universal coupling, wherein the outer end of one elevator is connected to the second encoder, and the outer end of the other elevator is connected to the drive motor.

[0014] Specifically, the second encoder is connected to the outer end of one of the elevators through a first elastic pin coupling, and the outer end of the other elevator is connected to the driving motor through a second elastic pin coupling.

[0015] Furthermore, the oil removal roller includes two bearing seats and a roller mounted on the bearing seats, the two bearing seats are fixed to the roller frame by bolts respectively, and one end of the roller extends out of the bearing seat and is connected to a first encoder.

[0016] Furthermore, the guide mechanism includes a guide column and a guide sleeve, the guide sleeve is fixed on the base, the upper part of the guide column is connected to the lower surface of the roller frame by bolts, the lower part of the guide column is slidably connected to the guide sleeve, and the drive motor drives the lifting mechanism and drives the guide column to move up and down along the guide sleeve.

[0017] Furthermore, the first encoder is an incremental encoder for measuring the rotation speed of the roller.

[0018] Furthermore, the second encoder is an absolute encoder, which can realize counting direction selection and zero position setting.

[0019] A method for online automatic compensation of roller diameter of a precision strip cold rolling mill, the automatic compensation method comprising the following steps:

[0020] S1. Set the zero position of the second encoder;

[0021] S2. The rotation speed of the oil removal roller is measured by the first encoder, and the linear speed of the strip is measured by the rolling mill tachometer;

[0022] S3. Calculate the real-time roller diameter of the oil removal roller by using the strip linear velocity and oil removal roller speed obtained in S2, and compare it with the new roller diameter of the oil removal roller to obtain the compensation adjustment required by the lifting mechanism in the height direction;

[0023] S4. The number of revolutions required by the drive motor is obtained from the compensation adjustment amount obtained in S3 and the speed ratio of the elevator. The real-time number of revolutions of the drive motor is measured by the second encoder and sent to the control system. The control system controls the drive motor to rotate the specified number of revolutions. The rotation of the drive motor drives the elevator to move up and down, so that the upper roller surface of the deoiling roller is adjusted to a position tangent to the rolling line.

[0024] The method for setting the zero position of the second encoder in S1 is as follows: when the degreasing roller is used for the first time, the height of the elevator is adjusted according to the new roller diameter of the degreasing roller. When the upper roller surface of the degreasing roller is adjusted to be tangent to the rolling line, the position at this time is set as the zero position of the second encoder.

[0025] By adopting the above technical solution, the present invention has the following beneficial effects:

[0026] 1) The system and method for online automatic compensation of roll diameter described in the present invention can realize online automatic compensation of roll diameter, thereby improving the automation level and production efficiency of the rolling mill.

[0027] 2) The incremental encoder used to measure the rotation speed of the degreasing roller and the absolute encoder used to measure the rotation speed of the driving motor in the present invention are both rotary encoders with high measurement accuracy and fast response speed, and can achieve high-precision compensation and rapid adjustment.

[0028] 3) During the use of the degreasing roller, the roller surface will gradually become smaller due to wear. The real-time roller diameter of the degreasing roller can be measured by the online automatic roller diameter compensation system and method discussed in the present invention. If the minimum roller diameter allowed for normal production of the degreasing roller is set in advance, when the degreasing roller reaches the minimum roller diameter and needs to be replaced, the control system can issue a prompt to the operator, which can improve the safety and reliability of production.

[0029] 4) The present invention uses a universal coupling to connect the two elevators, so that the lifting strokes of the elevators remain completely consistent, thereby ensuring the horizontal accuracy of the oil removal roller when the roller is lifted and lowered.

[0030] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is the front view of the roller diameter online automatic compensation system;

[0033] Figure 2 for Figure 1 AA section view;

[0034] Figure 3 for Figure 1 BB cross-sectional view.

[0035] Description of reference numerals:

[0036] 1. First encoder; 2. Degreasing roller; 3. Guide column; 4. Roller frame; 5. Guide sleeve; 6. Base; 7. First elastic pin coupling; 8. Second elastic pin coupling; 9. Lifter; 10. Universal coupling; 11. Drive motor; 12. Second encoder. DETAILED DESCRIPTION

[0037] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0038] It should be noted that, in the present invention, the top, bottom, left and right in the figure are deemed to be the top, bottom, left and right of the online automatic compensation system for the roller diameter of the precision strip cold rolling mill described in this specification.

[0039] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0040] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0041] Embodiment 1:

[0042] This embodiment provides an online automatic compensation system for the roller diameter of a precision strip cold rolling mill, such as Figure 1 As shown, it includes a base 6, and the base 6 is installed on the rolling mill;

[0043] A guide mechanism, wherein two sets of guide mechanisms are provided, and the two sets of guide mechanisms are symmetrically arranged on the base 6;

[0044] A roller frame 4, wherein the roller frame 4 is horizontally and laterally fixedly connected to the top of the guide mechanism;

[0045] An oil removal roller 2, wherein the oil removal roller 2 is horizontally and laterally fixedly connected to the upper surface of the roller frame 4;

[0046] A lifting mechanism, wherein the lifting mechanism is fixed on the base 6, and a lifting head of the lifting mechanism is connected to the lower surface of the roller frame 4;

[0047] The driving motor 11 is connected to the lifting mechanism through a transmission member. The driving motor 11 drives the lifting mechanism to make the degreasing roller 2 move vertically up and down.

[0048] During the use of the deoiling roller 2, the roller surface gradually wears and the roller diameter keeps getting smaller. The rolling mill control system automatically calculates the real-time roller diameter of the deoiling roller 2 through the rolling mill line speed and the rotational speed of the deoiling roller 2. By comparing it with the roller diameter of the new roller, the required compensation adjustment amount of the lifting mechanism in the height direction can be obtained. The lifting mechanism is driven by a driving motor to perform compensation adjustment, so that the upper roller surface of the deoiling roller 2 is adjusted to a position tangent to the rolling line, realizing online automatic compensation of the roller diameter and improving the automation level and production efficiency of the rolling mill.

[0049] Embodiment 2:

[0050] On the basis of Example 1, further, referring to Figure 1 , Figure 2 The lifting mechanism includes two lifts 9, which are symmetrically mounted on the base 6 and respectively located on the outsides of the two sets of guide mechanisms; the transmission member is a universal coupling 10, and the two lifts 9 are connected by the universal coupling 10, wherein the outer end of one lift 9 is connected to a second encoder 12, and the outer end of the other lift 9 is connected to a drive motor 11.

[0051] The present invention uses a universal coupling to connect two lifts, so that the lifting strokes of the lifts remain completely consistent, thereby ensuring the horizontal accuracy of the oil removal roller when the roller is lifted and lowered.

[0052] Embodiment 3:

[0053] On the basis of Example 2, further, the second encoder 12 is connected to the outer end of one of the elevators 9 through the first elastic pin coupling 7, and the outer end of the other elevator 9 is connected to the drive motor 11 through the second elastic pin coupling 8.

[0054] The second encoder 12 is an absolute encoder, which can realize counting direction selection and zero position setting.

[0055] Furthermore, the degreasing roller 2 includes two bearing seats and a roller mounted on the bearing seats. The two bearing seats are respectively fixed to the roller frame 4 by bolts. One end of the roller extends out of the bearing seats and is connected to the first encoder 1.

[0056] Specifically, the first encoder 1 is an incremental encoder, which is installed on the bearing seat of the degreasing roller 2. The first encoder shaft is connected to the roller to measure the rotation speed of the roller.

[0057] The incremental encoder used to measure the speed of the degreasing roller 2 and the absolute encoder used to measure the speed of the driving motor are both rotary encoders with high measurement accuracy and fast response speed, which can achieve high-precision compensation and fast adjustment.

[0058] Embodiment 4:

[0059] This embodiment provides a method for online automatic compensation of roller diameter of a precision strip cold rolling mill, comprising the following steps:

[0060] S1. Set the zero position of the second encoder 12;

[0061] S2. The rotation speed of the oil removal roller 2 is measured by the first encoder 1, and the linear speed of the strip is measured by the rolling mill tachometer;

[0062] S3. The real-time roller diameter of the oil removal roller 2 is calculated by the strip linear velocity and the rotation speed of the oil removal roller 2 obtained in S2, and compared with the new roller diameter of the oil removal roller 2 to obtain the compensation adjustment amount required for the lifting mechanism in the height direction;

[0063] S4. The number of revolutions required for the drive motor 11 is obtained from the compensation adjustment amount obtained in S3 and the speed ratio of the elevator 9. The real-time number of revolutions of the drive motor 11 is measured by the second encoder 12 and sent to the control system. The control system controls the drive motor 11 to rotate the specified number of revolutions. The rotation of the drive motor 11 drives the elevator 9 to move up and down, so that the upper roller surface of the de-oiling roller 2 is adjusted to a position tangent to the rolling line.

[0064] During the use of the oil removal roller, the roller surface will gradually become smaller due to wear. The actual roller diameter can be measured by the online automatic roller diameter compensation method described in the present invention. The minimum roller diameter allowed for normal production of the oil removal roller can also be set in advance. When the oil removal roller reaches the minimum roller diameter and needs to be replaced, the control system can issue a prompt to the operator, which can improve the safety and reliability of production.

[0065] Embodiment 5:

[0066] On the basis of Example 2, further, Figure 3 As shown, the guide mechanism includes a guide column 3 and a guide sleeve 5, and the guide sleeve 5 is fixed on a base 6; the guide column 3 is a steel cylindrical structure, the upper part of which is connected to the lower surface of the roller frame 4 by bolts, and the lower part of the guide column 3 is slidably connected to the guide sleeve 5, and the drive motor 11 drives the lifting mechanism and drives the guide column 3 to move up and down along the guide sleeve 5.

[0067] Furthermore, the roller frame 4 is a long flat plate, the upper surface of which is mounted the degreasing roller 2, and the lower surface of which is connected to the guide column 3 and the elevator 9 by bolts.

[0068] Furthermore, two long tubes are symmetrically welded at the left and right ends of the base 6, and the two long tubes are symmetrically provided with a first guide hole and a second guide hole, the guide sleeve 5 is installed in the first guide hole, and the lifter 9 is installed in the second guide hole.

[0069] Furthermore, a first fixed plate and a second fixed plate are also provided on the base 6. The first fixed plate and the second fixed plate are respectively vertically fixed on the long tubes at the left and right ends of the base 6 and are located on the outside of the elevator 9. The first elastic pin coupling 7 and the second elastic pin coupling 8 are respectively fixedly installed on the first fixed plate and the second fixed plate.

[0070] The working principle of the present invention is:

[0071] When the degreasing roller 2 is used for the first time, the height of the elevator 9 is adjusted according to the new roller diameter of the degreasing roller 2. When the upper roller surface of the degreasing roller is adjusted to be tangent to the rolling line, the position at this time is set as the zero position of the second encoder 12.

[0072] During the use of the degreasing roller 2, the roller surface of the degreasing roller gradually wears and the roller diameter keeps getting smaller. When the linear speed of the rolling mill strip remains unchanged, the smaller the roller diameter of the degreasing roller 2, the faster the rotation speed. The first encoder 1 can measure the rotation speed of the degreasing roller. The linear speed of the strip can be measured by the rolling mill speedometer. The rolling mill control system can automatically calculate the real-time roller diameter of the degreasing roller 2 through the linear speed and the rotation speed of the degreasing roller 2. By comparing it with the roller diameter of the new roller, the required compensation adjustment amount of the lifting mechanism in the height direction can be obtained. From this compensation adjustment amount and the speed ratio of the elevator 9 (the lifting amount of the elevator 9 for each rotation of the drive motor 11), the number of revolutions required by the motor can be known. The second encoder 12 is responsible for measuring the real-time number of revolutions and sending it to the control system. When the required number of revolutions is reached, the control system stops the drive motor 11 from rotating. At this time, the upper roller surface of the degreasing roller 2 is adjusted to a position tangent to the rolling line, and the adjustment is completed.

[0073] The above-mentioned whole process is carried out during the rolling process of the rolling mill. The system performs compensation adjustment online. The whole process is automatically detected and compensated and adjusted automatically without manual intervention. In addition, real-time adjustment can be achieved, that is, the lifting mechanism performs real-time compensation adjustment after the roller diameter of the deoiling roller 2 changes.

[0074] In summary, the online automatic compensation system and compensation method for roller diameter described in the present invention have high compensation accuracy and fast adjustment speed, can realize online automatic compensation for roller diameter, and have good application and promotion prospects.

[0075] The parts not specifically described in the above embodiments belong to well-known components and common structures or common means in the technical field, and will not be described in detail here.

[0076] In the absence of conflicts, those skilled in the art can combine the relevant technical features in the above examples according to actual conditions to achieve corresponding technical effects. The specific combinations are not described here one by one. The present invention will not be limited to the embodiments shown herein, but shall conform to the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for online automatic compensation of roller diameter of a precision strip cold rolling mill, characterized in that: It includes an online automatic compensation system for roller diameter of a precision strip cold rolling mill, the automatic compensation system includes A base, mounted on the rolling mill; The guide mechanism is provided with two groups, and the two groups of guide mechanisms are symmetrically arranged on the base; A roller frame, horizontally and laterally fixedly connected to the top of the guide mechanism; An oil removal roller is horizontally and transversely fixedly connected to the upper surface of the roller frame; A lifting mechanism is fixed on the base, and a lifting head of the lifting mechanism is connected to the lower surface of the roller frame; A driving motor, wherein the driving motor is connected to the lifting mechanism through a transmission member, and the driving motor drives the lifting mechanism to make the oil removal roller move vertically up and down; The automatic compensation method comprises the following steps: S1. Set the zero position of the second encoder: When the degreasing roller is used for the first time, adjust the height of the elevator according to the new roller diameter of the degreasing roller. When the upper roller surface of the degreasing roller is adjusted to be tangent to the rolling line, set the position at this time as the zero position of the second encoder; S2. The rotation speed of the oil removal roller is measured by the first encoder, and the linear speed of the strip is measured by the rolling mill tachometer; S3. Calculate the real-time roller diameter of the oil removal roller by using the strip linear velocity and oil removal roller rotation speed obtained in S2, and compare it with the new roller diameter of the oil removal roller to obtain the compensation adjustment amount required by the lifting mechanism in the height direction; S4. The number of revolutions required by the drive motor is obtained from the compensation adjustment amount obtained in S3 and the speed ratio of the elevator. The real-time number of revolutions of the drive motor is measured by the second encoder and sent to the control system. The control system controls the drive motor to rotate the specified number of revolutions. The rotation of the drive motor drives the elevator to move up and down, so that the upper roller surface of the deoiling roller is adjusted to a position tangent to the rolling line.

2. The method for online automatic compensation of roller diameter of a precision strip cold rolling mill according to claim 1, characterized in that: The lifting mechanism comprises two lifts, which are symmetrically mounted on the base and respectively located outside the two sets of guide mechanisms.

3. The method for online automatic compensation of roller diameter of a precision strip cold rolling mill according to claim 2, characterized in that: The transmission member is a universal coupling, and the two elevators are connected by the universal coupling, wherein the outer end of one elevator is connected to a second encoder, and the outer end of the other elevator is connected to a driving motor.

4. The method for online automatic compensation of roller diameter of a precision strip cold rolling mill according to claim 3, characterized in that: The second encoder is connected to the outer end of one of the elevators through a first elastic pin coupling, and the outer end of the other elevator is connected to the driving motor through a second elastic pin coupling.

5. The method for online automatic compensation of roller diameter of a precision strip cold rolling mill according to claim 1, characterized in that: The degreasing roller comprises two bearing seats and a roller mounted on the bearing seats. The two bearing seats are respectively fixed on the roller frame by bolts. One end of the roller extends out of the bearing seat and is connected to a first encoder.

6. The method for online automatic compensation of roller diameter of a precision strip cold rolling mill according to claim 1, characterized in that: The guide mechanism includes a guide column and a guide sleeve. The guide sleeve is fixed on the base. The upper part of the guide column is connected to the lower surface of the roller frame by bolts, and the lower part of the guide column is slidably connected to the guide sleeve. The driving motor drives the lifting mechanism and drives the guide column to move up and down along the guide sleeve.

7. The method for online automatic compensation of roller diameter of a precision strip cold rolling mill according to claim 1, characterized in that: The first encoder is an incremental encoder, which is used to measure the rotation speed of the roller.

8. The method for online automatic compensation of roller diameter of a precision strip cold rolling mill according to claim 1, characterized in that: The second encoder is an absolute encoder, which can realize counting direction selection and zero position setting.

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