A rolling force measurement system and a measuring method

Abstract

The present invention discloses a rolling force measurement system and a measurement method, which relates to the field of rolling technology, and includes: a primary element and a secondary instrument, wherein the primary element is a sensor assembly; the sensor assembly is arranged on a rolling mill frame, and an external measuring point and an internal measuring point are arranged on the rolling mill frame, wherein the external measuring point is provided with a first sensor assembly and a second sensor assembly, and the internal measuring point is provided with a third sensor assembly and a fourth sensor assembly; the two sensor assemblies of the external measuring point and the internal measuring point are both arranged in an "eight" shape, and the output ends of the measuring bridge of the first sensor assembly and the second sensor assembly, and the output ends of the measuring bridge of the third sensor assembly and the fourth sensor assembly are both reversely connected, and the output ends of the external measuring point and the internal measuring point are connected in series and connected to the secondary instrument. The present invention can improve the working environment of the primary element of the measurement system, and it is easy to take isolation measures against the influence of harmful factors such as heat sources and steam, and it is convenient for the installation and maintenance of the primary element.

Description

Technical Field

[0001] The present invention relates to the field of rolling technology, and more particularly to a rolling force measurement system and a measurement method. Background Art

[0002] The rolling force monitoring system plays a very important role in the automatic thickness control of rolled plates. Currently, the common ones are resistive rolling force measurement systems and magnetoelastic rolling force measurement systems. The shortcomings of their practical application are: the primary element (force sensor and accessories) is installed below the bearing seat of the support roll under the rolling mill, and is directly subjected to the erosion of coolant, heat, steam, oil pollution, etc. during operation. The working environment is very harsh and it is easy to be damaged and fail; on the other hand, the installation and maintenance of the primary element must be carried out after the rollers, bearing seats and other related parts in the frame are disassembled, which is very laborious and time-consuming; moreover, the primary element used to detect such a large load as the rolling force is very large in size, and its manufacturing and calibration technical conditions are high, difficult and costly.

[0003] Therefore, how to improve the working environment of the primary components of the existing rolling force measurement system, reduce the difficulty of installation and maintenance, and increase the service life is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In view of this, the present invention provides a rolling force measurement system and method, which adopts an attached resistance strain sensor assembly as a primary element and a matching electric welding process to install it on the rolling mill in one go, which can reduce the difficulty of installation and maintenance and increase the service life.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A rolling force measurement system comprises: a primary element and a secondary instrument, wherein the primary element is a sensor assembly;

[0007] The sensor assembly is arranged on the rolling mill frame, and the rolling mill frame is provided with an external measuring point and an internal measuring point, the external measuring point is provided with a first sensor assembly and a second sensor assembly, and the internal measuring point is provided with a third sensor assembly and a fourth sensor assembly;

[0008] The two sensor assemblies of the external measuring point and the internal measuring point are arranged in an "eight" shape, the output end of the measuring bridge of the first sensor assembly and the second sensor assembly, and the output end of the measuring bridge of the third sensor assembly and the fourth sensor assembly are reversely connected, and the output ends of the external measuring point and the internal measuring point are connected in series and connected to the secondary instrument.

[0009] The technical effect achieved by the above technical scheme is: the main structural setting of the rolling force measurement system is disclosed, the working environment of the primary element can be improved, and it is easy to take isolation measures against the influence of harmful factors such as heat sources and steam, which facilitates the installation and maintenance of the primary element.

[0010] Optionally, the positions of the first sensor assembly and the second sensor assembly at the external measuring point and the third sensor assembly and the fourth sensor assembly at the internal measuring point correspond in reverse and overlap, and the longitudinal axis of each sensor is consistent with its own main deformation direction; the longitudinal axes of the first sensor assembly and the second sensor assembly, and the third sensor assembly and the fourth sensor assembly are perpendicular to each other and the angle between them and the horizontal line is 45°±5°. In specific implementation, due to different frame structures, this angle is close to 45°.

[0011] The technical effect achieved by the above technical solution is: a specific method of arranging the sensor assembly in an "eight" shape is disclosed. In actual use, a positive "eight" or an inverted "eight" shape can be selected, and it is consistent with the main deformation direction, which can double the primary output and has a good temperature compensation function.

[0012] Optionally, the measuring bridge voltage of the first sensor assembly, the second sensor assembly, the third sensor assembly and the fourth sensor assembly is 10±2V and is adjustable, and the primary output of the channel is approximately 1mv / 1v, and the output varies depending on the structure of the rolling mill frame.

[0013] Optionally, the sensor assembly is an attached resistive strain sensor assembly.

[0014] Optionally, the base length L0 of the attached resistance strain sensor assembly ranges from 50 to 200 mm, and the magnification ψ is 20; under the action of the rolling force, the axial force p borne by the attached resistance strain sensor assembly is <20 kgf.

[0015] The technical effects achieved by the above technical scheme are: disclosing the specific selection of a suitable sensor assembly, which can meet the primary output value requirements of the detection system; when the rolling mill is working, it only bears a very small axial force component and has a large overload upper limit, so the primary element has a very long working life, which can greatly save its maintenance cost and has good economy.

[0016] Optionally, the installation positions of the external measuring points and the internal measuring points are the middle positions of the two side surfaces of the upper beam end of the rolling mill frame, and the middle position is close to the connection with the column; the external measuring points and the internal measuring points are respectively arranged on the outer side surface and the inner side surface at the middle position.

[0017] The technical effects achieved by the above technical scheme are: the best position for installing the measuring point is disclosed, a better working environment and better deformation output performance are provided, and a platform is provided for easy installation and maintenance. There is no direct erosion by water or oil stains, and the heat and steam generated during the operation of the rolling mill have adverse effects on the measuring point, and it is easy to take isolation measures.

[0018] Optionally, the sensor assembly is welded to the rolling mill frame through 4 or 8 "U"-shaped notches on both sides of the two ends of the sensor assembly substrate.

[0019] The technical effects achieved by the above technical scheme are as follows: the installation method of the sensor assembly is disclosed, and the primary element is installed by a matching electric welding process, which greatly simplifies the installation work, and the primary element is rigidly connected to the structural body as one, and the deformation signal is transmitted very directly during operation, and it has good dynamic working performance such as resistance to impact and vibration, and stable and reliable primary output performance.

[0020] The present invention also discloses a rolling force measurement method, comprising the following steps:

[0021] Based on mechanical analysis, determine the installation position of the measuring points on the rolling mill frame;

[0022] An inner measuring point and an outer measuring point are respectively arranged on the inner side surface and the outer side surface at the measuring point installation position;

[0023] At the outer measuring point, a first sensor assembly and a second sensor assembly are arranged in an "eight" shape; at the inner measuring point, a third sensor assembly and a fourth sensor assembly are arranged in an "eight" shape;

[0024] The output ends of the measuring bridges of the first sensor assembly and the second sensor assembly and the output ends of the measuring bridges of the third sensor assembly and the fourth sensor assembly are reversely connected, and the output ends of the external measuring point and the internal measuring point are connected in series and then connected to the secondary instrument to form a rolling force measurement system of one channel;

[0025] Based on the rolling force measurement system, the deformation output of the measuring point is measured to obtain the rolling force.

[0026] Optionally, the positions of the first sensor assembly and the second sensor assembly at the external measuring point and the third sensor assembly and the fourth sensor assembly at the internal measuring point correspond in reverse and overlap, and the longitudinal axis of each sensor is consistent with its own main deformation direction; the longitudinal axes of the first sensor assembly and the second sensor assembly, and the third sensor assembly and the fourth sensor assembly are perpendicular to each other and the angle between them and the horizontal line is 45°±5°. In specific implementation, due to different frame structures, this angle is close to 45°.

[0027] Optionally, the first sensor assembly, the second sensor assembly, the third sensor assembly, and the fourth sensor assembly are installed as follows:

[0028] The sensor assembly substrate is welded to the rolling mill frame through 4 or 8 "U"-shaped notches on both sides of the two ends; after the installation is completed, the positioning plates on both sides of the sensor assembly substrate are removed, the outer cover is installed and the sealant is applied around it.

[0029] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a rolling force measurement system and a measurement method, which have the following beneficial effects:

[0030] (1) The present invention can improve the working environment of the primary element, which is basically free of direct corrosion by water, steam, oil, etc., is far away from the heat source, and it is easy to take measures to isolate the influence of harmful environmental factors on the measuring point, which is convenient for the installation and maintenance of the primary element;

[0031] (2) The location of the measuring point is selected according to the structure of the rolling mill. The selected measuring point has a higher main deformation and output stability when the rolling mill is working, which not only doubles its primary output but also has a good temperature compensation effect;

[0032] (3) The primary element uses a high-amplification attached resistance strain sensor assembly with strong overload capacity and low overload risk;

[0033] (4) The use of a matching electric welding process to install the primary element greatly simplifies the installation work, and the primary element is rigidly connected to the structural body as one. The deformation signal is transmitted very directly during operation, and it has good dynamic working performance such as resistance to impact and vibration, and has stable and reliable primary output performance; the primary element has a very long working life, which can greatly save its maintenance cost and has good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0035] Figure 1 Schematic diagram of measuring point location;

[0036] Figure 2 It is a schematic diagram of sensor settings at the measuring point;

[0037] Figure 3 This is a schematic diagram of the sensor setting in the shape of a figure eight;

[0038] Figure 4 This is a schematic diagram of the sensor's inverted "eight" setting;

[0039] Figure 5 This is the wiring diagram of the measuring point;

[0040] Figure 6 A schematic diagram of welding points of an attached sensor assembly with a base length of 50-100 mm in one embodiment;

[0041] Figure 7 A schematic diagram of welding points of an attached sensor assembly with a base length of 150-200 mm in another embodiment;

[0042] Figure markings: 1-measuring point, 2-upper beam, 3-column, 4-platform, 5-external measuring point, 6-inner measuring point, 7-first sensor assembly, 8-second sensor assembly, 9-third sensor assembly, 10-fourth sensor assembly, 11-a certain measuring point sensor, 12-outer cover, 13-U-shaped notch, 14-base plate, 15-positioning plate. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] In view of the problems found in the actual application of the existing rolling force measurement system, such as the poor working environment of the primary element, the difficulty of installation and maintenance, and the high requirements for manufacturing and calibration technical conditions, the embodiment of the present invention discloses a rolling force measurement system, including: a primary element and a secondary instrument, wherein the primary element is a sensor assembly. Specifically, it can be analyzed from the following aspects:

[0046] 1. Selection of measuring point location

[0047] First, through on-site observation and qualitative mechanical analysis, several locations on the rolling mill structure where measuring points may be set are preliminarily determined. Then, through mechanical analysis and repeated finite element calculations, locations on the rolling mill structure with better working environment and better output performance are selected as measuring point locations. The principles are: (1) There is basically no direct corrosion from water, steam, oil, etc., and it is far away from the heat source, making it easy to take measures to isolate the influence of harmful environmental factors on the measuring point; (2) The primary components are easy to install and maintain; (3) When the rolling mill is working, there is a higher main deformation and output stability at the measuring point.

[0048] Based on the above principles, in this embodiment, the middle of the two side surfaces of the end of the upper beam 2 of the rolling mill frame, close to the connection with the column 3, is selected as the position of the measuring point 1. This place has a better deformation output when the rolling mill is working. The specific position is as follows Figure 1 (The left side is the front view of the frame, and the right side is the side view of the frame). In addition, a platform 4 is provided here, which is convenient for installation and maintenance, and there is no direct erosion of water and oil, and the adverse effects of heat and steam generated by the rolling mill on the measuring point during operation, and it is easy to take isolation measures.

[0049] 2. Measurement point setting and wiring method

[0050] 1. Setting method of primary element of measuring point

[0051] An outer measuring point 5 and an inner measuring point 6 are respectively arranged on the outer side surface and the inner side surface at the selected measuring point position, the outer measuring point 5 is provided with a first sensor assembly 7 and a second sensor assembly 8, and the inner measuring point 6 is provided with a third sensor assembly 9 and a fourth sensor assembly 10;

[0052] The two sensor assemblies at the outer measuring point 5 and the inner measuring point 6 are both arranged in an "eight" shape (positive "eight" or inverted "eight" shape). The positions of the first sensor assembly 7 and the second sensor assembly 8 at the outer measuring point 5 and the third sensor assembly 9 and the fourth sensor assembly 10 at the inner measuring point 6 are oppositely aligned and coincide with each other, that is, the first sensor assembly 7 coincides with the third sensor assembly 9, and the second sensor assembly 8 coincides with the fourth sensor assembly 10 at the upper, lower, left, and right positions. The longitudinal axes of the two sensors 11 (indicating the sensors at a certain measuring point) at each measuring point on the inner and outer sides are consistent with their respective main deformation directions, are perpendicular to each other, and have an angle of 45°±5° with the horizontal line. In specific implementation, due to different frame structures, this angle is close to 45°. For details, see Figure 2 Partial front view of the rack and Figure 3 , Figure 4 The diagrams of the sensor's positive "eight" setting and inverted "eight" setting are shown (the left side is the outer measuring point and the right side is the inner measuring point).

[0053] 2. Wiring method of measuring points

[0054] The wiring method of the measuring point is as follows Figure 5 As shown, the output ends of the measuring bridges of the first sensor assembly 7 and the second sensor assembly 8 are reversely connected, the output ends of the measuring bridges of the third sensor assembly 9 and the fourth sensor assembly 10 are reversely connected, and the output ends of the two measuring points are connected in series to the secondary instrument to form a one-channel rolling force measurement system.

[0055] In this embodiment, the measuring bridge voltage of the four sensor assemblies is 10±2V, which is adjustable, and the primary output of the channel is about 1mv / 1v, which varies according to the different structures of the rolling mill frame. The measurement point setting method adopted in this embodiment not only doubles its primary output, but also has a good temperature compensation effect.

[0056] 3. Selection of primary components at measuring points and their installation on the rack structure

[0057] When the rolling mill is working, the frame is subjected to a great rolling force. In order to ensure its rigidity, the frame structure is generally designed with a low stress level. Therefore, in this embodiment, the primary element adopts a high-magnification attached resistance strain sensor assembly, whose base length L0 ranges from 50-200mm and the magnification ψ is about 20, so as to meet the primary output value requirements of the detection system; at the same time, under the action of the rolling force, the axial force p<20kgf borne by the attached resistance strain sensor assembly is basically free of overload risk.

[0058] The measurement basis of the traditional resistive force sensor is force, while the measurement basis of the attached sensor assembly used in this system is absolute deformation ΔL. Like measuring other loads, the rolling force is measured by the deformation output of the measuring point. Within the elastic deformation range of the structure at the measuring point, the deformation is proportional to the load (rolling force), and its primary output signal is: δ = C2×E×ε×ψ×L0×V.

[0059] The sensor assembly is installed at the selected position of the frame structure using a matching electric welding process. It is welded to the structure at one time through the 4 or 8 "U"-shaped notches 13 on both sides of the base plate below the sensor assembly. For details, see Figure 6 , Figure 7 .

[0060] After all sensor assemblies are installed correctly, the positioning plates 15 on both sides of the assembly base plate 14 should be removed, and the front and rear measuring points should be equipped with their own protective covers 12 (see Figure 3 , Figure 4 ), and apply sealant around the outer cover 12, and then connect its output end to the instrument.

[0061] The primary element is installed through the matching electric welding process, which not only greatly simplifies the installation work, but also the primary element is rigidly connected to the structural body as one. The deformation signal transmission during operation is very direct, with good dynamic working performance such as resistance to impact and vibration, and stable and reliable primary output performance.

[0062] The attached sensor installed by electric welding only bears a small axial force when the rolling mill is working and has a large overload upper limit. Therefore, the primary element can have a very long working life, which can greatly save its maintenance cost and has good economy.

[0063] In actual use, according to different technical requirements and conditions, a group of measuring points can be set on one of the pairs of frames of the rolling mill (a total of 4 sensor assemblies for the inner and outer measuring points), and the primary output can be connected to the secondary instrument to form a channel rolling force measurement system; or the same group of measuring points can be set on both pairs of frames of the rolling mill and respectively connected to the secondary instruments to form two channel rolling force measurement systems, which are respectively used to measure the rolling forces at both ends of the rolling mill rolls.

[0064] Example 2

[0065] The present embodiment discloses a rolling force measurement method, comprising the following steps: determining the installation position of the measuring point on the rolling mill frame based on mechanical analysis; arranging the inner measuring point and the outer measuring point on the inner side and the outer side of the measuring point installation position respectively; arranging the first sensor assembly and the second sensor assembly in an "eight" shape at the outer measuring point; arranging the third sensor assembly and the fourth sensor assembly in an "eight" shape at the inner measuring point; reversely connecting the output end of the measuring bridge of the first sensor assembly and the second sensor assembly and the output end of the measuring bridge of the third sensor assembly and the fourth sensor assembly, connecting the output ends of the outer measuring point and the inner measuring point in series and then connecting them to the secondary instrument to form a rolling force measurement system of one channel; based on the rolling force measurement system, measuring the deformation output of the measuring point to obtain the rolling force magnitude.

[0066] Among them, the positions of the first sensor assembly and the second sensor assembly at the external measuring point and the third sensor assembly and the fourth sensor assembly at the internal measuring point are oppositely corresponding and coincident, and the longitudinal axis of each sensor is consistent with the respective main deformation direction; the longitudinal axes of the first sensor assembly and the second sensor assembly, the third sensor assembly and the fourth sensor assembly are perpendicular to each other and the angle with the horizontal line is 45°±5°. In the specific implementation, due to the different frame structures, this angle is close to 45°. In addition, the installation method of the sensor assembly is: through the 4 or 8 "U"-shaped notches on both sides of the two ends of the sensor assembly substrate, it is welded on the rolling mill frame; after the installation is completed, the positioning plates on both sides of the sensor assembly substrate are removed, the outer cover is installed and the sealant is applied around it.

[0067] According to the above analysis, it can be understood that the present invention can improve the working environment of the primary element, which is basically free of direct corrosion by water, steam, oil, etc., is far away from the heat source, and is easy to take measures to isolate the influence of harmful environmental factors on the measuring points, which is convenient for the installation and maintenance of the primary element; in addition, the use of a matching electric welding process to install the primary element greatly simplifies the installation work, and the primary element is rigidly connected to the structural body as a whole, the deformation signal transmission during operation is very direct, and it has good dynamic working performance such as resistance to impact and vibration, and has stable and reliable primary output performance; the primary element has a very long working life, can greatly save its maintenance cost and has good economy.

[0068] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. As for the method disclosed in the embodiment, since it corresponds to the system disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0069] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rolling force measurement system, characterized in that: include: A primary element and a secondary instrument, wherein the primary element is a sensor assembly; The sensor assembly is arranged on the rolling mill frame, and the rolling mill frame is provided with an external measuring point and an internal measuring point, the external measuring point is provided with a first sensor assembly and a second sensor assembly, and the internal measuring point is provided with a third sensor assembly and a fourth sensor assembly; The two sensor assemblies of the outer measuring point and the inner measuring point are arranged in an "eight" shape, the output end of the measuring bridge of the first sensor assembly and the second sensor assembly, and the output end of the measuring bridge of the third sensor assembly and the fourth sensor assembly are reversely connected, and the output ends of the outer measuring point and the inner measuring point are connected in series and connected to the secondary instrument; The positions of the first sensor assembly and the second sensor assembly of the outer measuring point and the third sensor assembly and the fourth sensor assembly of the inner measuring point are reversely aligned, and the longitudinal axes of the first sensor assembly and the second sensor assembly, and the third sensor assembly and the fourth sensor assembly are perpendicular to each other and have an angle of 45°±5° with the horizontal line; The sensor assembly is an attached resistance strain sensor assembly; The installation positions of the external measuring points and the internal measuring points are the middle positions of the two side surfaces of the upper beam end of the rolling mill frame, and the middle position is close to the connection with the column; the external measuring points and the internal measuring points are respectively arranged on the outer side surface and the inner side surface at the middle position.

2. A rolling force measurement system according to claim 1, characterized in that: The measurement bridge voltage of the first sensor assembly, the second sensor assembly, the third sensor assembly and the fourth sensor assembly is 10±2V.

3. A rolling force measurement system according to claim 1, characterized in that: The base length L0 of the attached resistance strain sensor assembly ranges from 50 to 200 mm, and the magnification Ψ is 20; under the action of rolling force, the axial force p borne by the attached resistance strain sensor assembly is <20kgf.

4. A rolling force measurement system according to claim 1, characterized in that: The sensor assembly is welded on the rolling mill frame through 4 or 8 "U"-shaped notches on both sides of the two ends of the sensor assembly substrate.

5. A rolling force measurement method applied to the rolling force measurement system according to any one of claims 1 to 4, characterized in that: The following steps are involved: Based on mechanical analysis, determine the installation position of the measuring points on the rolling mill frame; An inner measuring point and an outer measuring point are respectively arranged on the inner side surface and the outer side surface at the measuring point installation position; At the outer measuring point, a first sensor assembly and a second sensor assembly are arranged in an "eight" shape; at the inner measuring point, a third sensor assembly and a fourth sensor assembly are arranged in an "eight" shape; The output ends of the measuring bridges of the first sensor assembly and the second sensor assembly and the output ends of the measuring bridges of the third sensor assembly and the fourth sensor assembly are reversely connected, and the output ends of the external measuring point and the internal measuring point are connected in series and then connected to the secondary instrument to form a rolling force measurement system of one channel; Based on the rolling force measurement system, the deformation output of the measuring point is measured to obtain the rolling force.

6. A rolling force measurement method according to claim 5, characterized in that: The installation method of the first sensor assembly, the second sensor assembly, the third sensor assembly, and the fourth sensor assembly is: The sensor assembly substrate is welded to the rolling mill frame through 4 or 8 "U"-shaped notches on both sides of the two ends; after the installation is completed, the positioning plates on both sides of the sensor assembly substrate are removed, the outer cover is installed and the sealant is applied around it.

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