High-efficiency cold rolling equipment for special alloy precision strip

Abstract

The application provides high-efficiency cold rolling equipment for special alloy precision strips, which comprises a high-precision cascade power system and a self-adaptive flexible oil removal system, the high-precision cascade power system has a large tension output mode and a micro tension fluctuation mode, the self-adaptive flexible oil removal system has a strong contact oil removal mode and a weak contact oil removal mode, and the strong contact oil removal mode or the weak contact oil removal mode is selected and started according to the output mode of the high-precision cascade power system. The application automatically executes the power source of the high-precision cascade power system and the cylinder of the self-adaptive flexible oil removal system according to the thickness of the strip fed back by a thickness measuring system, which greatly increases the rolling range of the equipment and enables the thick strips and the thin strips to be efficiently rolled. The application adopts a process control strategy of large tension output and strong contact oil removal for the thick strips and a process strategy of micro tension fluctuation and weak contact oil removal for the thin strips, which greatly improves the unit capacity and efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of strip rolling, and particularly relates to high-efficiency cold rolling equipment for special alloy precision strips. BACKGROUND

[0002] With the wide application of strips in the fields of national defense, military industry, household appliances and microelectronics, especially the promotion of high-tech electronic products such as curved screens, the end users of products require the strips to have the strict requirements of extremely thin thickness, extremely high strength, extremely good flatness and high electrical conductivity. At present, the demand for such special alloy precision strips is extremely large in China.

[0003] The main reason for the predicament is that the material properties of special alloys are quite different, and the main characteristics of such alloys are large hardness, difficult deformation and poor ductility. Due to the requirements far exceeding those of conventional metal materials, the preparation of special alloy thin strips has the following problems in actual rolling production:

[0004] (1) Low efficiency

[0005] Due to poor ductility, extremely high strength and obvious work hardening, etc., the single production line of the domestic special alloy production system can only complete the rolling of raw materials in a certain thickness range, which causes obstacles to the full series production of special alloy precision strips and causes the product to be in short supply.

[0006] (2) Small capacity

[0007] The end users have extremely strict requirements for the residual oil on the surface of the precision strips, but the current technical means have poor oil removal effect in high-speed production. SUMMARY

[0008] The application aims to provide high-efficiency cold rolling equipment for special alloy precision strips to overcome the above technical defects.

[0009] To solve the above technical problems, the application provides high-efficiency cold rolling equipment for special alloy precision strips, which comprises a thickness measuring system for detecting the thickness of the strip, and further comprises:

[0010] A high-precision cascade power system has a large tension output mode and a micro-tension fluctuation mode, and according to the thickness of the strip obtained by the thickness measuring system, the large tension output mode or the micro-tension fluctuation mode is selected to be started;

[0011] An adaptive flexible oil removal system has a strong contact oil removal mode and a weak contact oil removal mode, and according to the output mode of the high-precision cascade power system, the strong contact oil removal mode or the weak contact oil removal mode is selected to be started.

[0012] The high-precision cascade power system comprises a master and a slave, wherein the tail end of the master is configured with a high-resolution encoder, and the slave is installed at the output end of the master and coaxial with the master.

[0013] The output torque of the master and slave devices is the same;

[0014] A high-precision cascaded power system is installed on the rolling mill and / or located near the coiler.

[0015] When the thickness measurement system detects the target strip thickness h≥s, it activates the high-tension output mode, where the high-tension output mode means that both the master and slave devices are in use.

[0016] When the high-tension output mode is activated, the adaptive flexible oil removal system activates the strong contact oil removal mode.

[0017] When the thickness measurement system detects that the thickness of the target strip is h < s, the micro-tension fluctuation mode is activated, where the micro-tension fluctuation mode means that only the main unit is put into use.

[0018] When the micro-tension fluctuation mode is activated, the adaptive flexible oil removal system activates the weak contact oil removal mode.

[0019] The adaptive flexible oil removal system includes an oil removal roller and a support roller tangent to the oil removal roller, with a dot matrix cylinder system arranged at a position away from the tangent plane between the two.

[0020] All cylinder heads in the dot matrix cylinder system are connected to the support rollers.

[0021] The support roller includes a roller shaft with multiple roller body segments distributed on it. Each roller body segment corresponds to one cylinder in the dot matrix cylinder system, and the number of segments of the support roller or the number of cylinders in the dot matrix cylinder system is an odd number.

[0022] The strong contact degreasing mode refers to the multi-section roller body of the dot matrix cylinder system in which all cylinders extend to squeeze the corresponding support rollers.

[0023] The weak contact degreasing mode refers to the middle cylinder and the two end cylinders of the dot matrix cylinder system extending out along the width direction of the target strip to squeeze the corresponding support roller body, while the other cylinders do not work.

[0024] The high-efficiency cold rolling equipment for precision strip of special alloys also includes a strip shape control system for detecting changes in strip shape. When the strip shape control system detects a defect in the target strip, it sends a signal to the adaptive flexible degreasing system. The adaptive flexible degreasing system performs pre-action degreasing on the surface of the target strip. The pre-action time is t = L / v, where L is the relative distance between the degreasing roller and the strip shape roller of the strip shape control system, and v is the forward speed of the target strip.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) According to the thickness of the target strip, the power source of the high-precision cascade power system is automatically executed, and the thick strip adopts a large tension output process control strategy, the thin strip adopts a micro-tension fluctuation process strategy, and the high-precision tension control of the strip with different thickness ranges is completed.

[0027] (2) An adaptive flexible oil removal system is also proposed, which adjusts the contact stress between the oil removal roller and the target strip in real time by the position and number of the air cylinder to break the oil film in time according to the thickness and shape of the target strip.

[0028] (3) The high-precision cascade power system and the adaptive flexible oil removal system, the two subsystems work together to complete high-precision tension control and precise oil removal for strips with different thickness ranges, so as to greatly improve the efficiency and capacity of the unit.

[0029] In order to make the above content of the application more obvious and easy to understand, the following preferred embodiments are described in detail below in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of the high-precision cascade power system.

[0031] Figure 2 is a structural schematic diagram of the high-precision cascade power system.

[0032] Figure 3 is a structural schematic diagram of the adaptive flexible oil removal system.

[0033] BRIEF DESCRIPTION OF DRAWINGS:

[0034] 100. main machine;

[0035] 200. slave machine;

[0036] 310. oil removal roller; 320. supporting roller;

[0037] 400. dot matrix air cylinder system. DETAILED DESCRIPTION

[0038] The following describes the embodiments of the application by specific specific embodiments, and those skilled in the art can easily understand other advantages and effects of the application from the content disclosed in the specification.

[0039] It should be noted that in the present application, up, down, left and right in the figure are considered as up, down, left and right of the special alloy precision strip high-efficiency cold rolling equipment described in the specification.

[0040] While the application is amenable to variations designed to achieve the same objectives, for the sake of brevity, an exemplary embodiment is now described, as summarized to provide a general understanding of the application. It is appreciated that the detailed description will reveal the preferred aspects of the application, and they are capable of being carried out in various other ways. The terminology used in the detailed description is for the purpose of describing the particular versions of the application and is not intended to limit the scope of the application. In the drawings, the same elements have the same reference numerals to the extent possible.

[0041] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0042] Special alloy is an iron-carbon alloy which is made of adding one or more alloying elements to ordinary carbon steel; and very thin strip refers to a metal strip with a thickness of less than 0.02-0.03 mm, and generally refers to a strip with a thickness of less than 0.05 mm.

[0043] The rolling mill is a device for realizing the metal rolling process, and itself has a thickness measuring system for detecting the thickness of the strip (or plate) and a shape control system for detecting the shape change of the plate. Since the thickness measuring system and the shape control system are the conventional equipment attached to the rolling mill, they will not be described here.

[0044] The present embodiment relates to a high-efficiency cold rolling equipment for special alloy precision strip, which is suitable for a rolling mill and includes a thickness measuring system for detecting the thickness of the strip and a shape control system for detecting the shape change of the plate, as shown in Figure 1 , and further includes:

[0045] (1) A high-precision cascade power system has a large tension output mode and a micro-tension fluctuation mode, and according to the target strip thickness (denoted by h below) obtained by the thickness measuring system, the large tension output mode or the micro-tension fluctuation mode is selected to be started.

[0046] According to the thickness of the strip, the strip is divided into thicker strip and thinner strip. If the target strip is determined to be thicker strip, since a large tension output is required when the strip is thicker and a certain anti-interference is required for the tension fluctuation, a larger tension rolling is required, so the large tension output mode is started. If the target strip is determined to be thinner strip, since only a small tension output is required when the strip is thinner but the tension fluctuation is required to be very small, a smaller output torque is required, so the micro-tension fluctuation mode is started.

[0047] The high-precision cascade power system is installed on a rolling mill and / or a coiler arranged near the rolling mill to serve as a power source of the rolling mill and the coiler, and focuses on solving the technical problem of small rolling thickness range of the rolling mill, because a large tension output is required when the strip is thick, and the tension fluctuation has certain anti-interference, but only a small tension output is required when the strip is thin, and the tension fluctuation is required to be very small, otherwise, a serious accident such as strip breakage is prone to occur.

[0048] Please refer to Figure 2 , the high-precision cascade power system comprises a master machine 100 and a slave machine 200, wherein a high-resolution encoder is arranged at the tail end of the master machine 100, and the resolution of the encoder is 4096, and the high-resolution encoder is mainly used to record the key information such as the rotating speed of the system in real time; the slave machine 200 is installed at the output end of the master machine 100 and coaxial with the master machine 100, that is, the master machine 100 and the slave machine 200 are coaxially arranged.

[0049] The carrying capacity (output torque) of the master machine 100 and the slave machine 200 is the same, that is, 主 =T 从 .

[0050] When the thickness detection system detects that the thickness h of the target strip is greater than or equal to s, the large tension output mode is started, wherein the large tension output mode means that both the master machine 100 and the slave machine 200 are put into use, so that a larger tension rolling can be realized, because the total output torque of the power system is about twice that when the strip is thin, that is, max =T 主 +T 从 =2T 主 .

[0051] When the thickness detection system detects that the thickness h of the target strip is less than s, the micro-tension fluctuation mode is started, wherein the micro-tension fluctuation mode means that only the master machine 100 is put into use, because the output torque at this time is smaller, so that the change of the tension fluctuation value ΔT caused by the same control precision of the equal percentage m% of the tension fluctuation is about 50% of that when the strip is thick, which provides a necessary condition for the stable rolling of the thin strip, that is, ΔT=T 主 m%=1 / 2T max m%.

[0052] The linkage control of the thickness detection system and the high-precision cascade power system can realize the execution of the master machine 100 and / or the slave machine 200 according to the thickness of the strip, that is, by automatically adjusting the input mode of the master machine 100 and the slave machine 200, the maximum rolling thickness of the high-precision cascade power system can reach 50 times of the minimum rolling thickness, which greatly expands the rolling thickness range of the equipment, and the tension control precision of the system is 1% of the maximum output tension, so that the extremely thin strip of 0.01 mm can be efficiently rolled.

[0053] (2) The adaptive flexible oil removal system has a strong contact oil removal mode and a weak contact oil removal mode, and according to the output mode of the high-precision cascade power system, the strong contact oil removal mode or the weak contact oil removal mode is selected to start, in particular:

[0054] When the large tension output mode is started, the adaptive flexible oil removal system starts the strong contact oil removal mode;

[0055] When the micro-tension fluctuation mode is started, the adaptive flexible oil removal system starts the weak contact oil removal mode.

[0056] That is, according to the target strip thickness, not only the large tension output mode or the micro-tension fluctuation mode is selected to start, but also the strong contact oil removal mode or the weak contact oil removal mode of the adaptive flexible oil removal system needs to be executed, that is, the high-precision cascade power system and the adaptive flexible oil removal system, the two subsystems work together to complete the high-precision tension control and precise oil removal for the strip in different thickness ranges.

[0057] The main function of the adaptive flexible oil removal system is to complete the efficient oil removal of special alloys, as shown in Figure 3 , which includes an oil removal roller 310, which is a 30mm copper roller to prevent scratching the surface of the strip, and the oil removal roller 310 is configured with a support roller system to reduce the deformation of the equipment during the oil removal process.

[0058] According to the size of the contact force required, the support roller system can be composed of one or more layers of support rollers 320, the support rollers 320 and the oil removal roller 310 are tangent, and a dot matrix cylinder system 400 is arranged at the position away from the tangent surface of the two, the dot matrix cylinder system 400 refers to a plurality of cylinders arranged in a dot matrix manner.

[0059] All cylinder heads in the dot matrix cylinder system 400 are connected to the support roller 320, and the outermost support roller 320 is composed of multiple coaxial segments to work with the cylinder system and form a linkage control with the plate shape control system.

[0060] Specifically, the outermost support roller 320 of the adaptive flexible oil removal system is connected to the dot matrix cylinder system 400 through a roller box, because the response speed of the cylinder is much higher than that of the oil cylinder, and the cylinder can not only realize flexible oil removal on the surface of the strip but also will not cause changes in the plate shape and thickness of the strip; and the cylinder system is symmetrically arranged about the center line of the unit, and the number of cylinders is odd and the same as the number of segments of the outermost support roller 320 of the support roller system to complete one-to-one precise control.

[0061] The main function of the dot matrix cylinder system 400 is to adjust the contact stress between the oil removal roller 310 and the strip in real time to break the oil film in time.

[0062] When the large tension output mode is started, the adaptive flexible oil removal system starts the strong contact oil removal mode, which means that all the air cylinders of the dot-matrix air cylinder system 400 are extended to extrude the multi-section roller bodies of the corresponding support rollers 320.

[0063] When the micro tension fluctuation mode is started, the adaptive flexible oil removal system starts the weak contact oil removal mode, which means that along the width direction of the target strip, the middle air cylinders and the end air cylinders of the dot-matrix air cylinder system 400 are extended to extrude the roller bodies of the corresponding support rollers 320, and the remaining air cylinders are not working.

[0064] That is, if the target strip thickness h≥s, the large tension output mode and the strong contact oil removal mode are started, which means that all the air cylinders of the dot-matrix air cylinder system 400 are extended to extrude the multi-section roller bodies of the corresponding support rollers 320, that is, the dot-matrix air cylinder system 400 of the adaptive flexible oil removal system puts all the air cylinders into operation when the strip thickness is greater than or equal to 0.1 mm, at this time, a larger contact stress can be output to the thicker strip and the thickness of the strip is not greatly affected.

[0065] If the target strip thickness h<s, the micro tension fluctuation mode and the weak contact oil removal mode are started, which means that along the width direction of the target strip, the middle air cylinders and the end air cylinders of the dot-matrix air cylinder system 400 are extended to extrude the roller bodies of the corresponding support rollers 320, and the remaining air cylinders are not working. That is, the dot-matrix air cylinder system 400 of the adaptive flexible oil removal system only puts a total of three air cylinders in the middle and at both ends in the plate width direction into operation when the strip thickness is less than 0.1 mm, at this time, a smaller contact stress can be output to the thinner strip, so that the purpose of efficient oil removal can be achieved without adversely affecting the thickness and shape of the strip.

[0066] The above target strip thickness h actually refers to the inlet thickness of the target strip. If the target strip thickness h≥0.1 mm, that is, s=0.1 mm, the target strip with this thickness is a thicker strip. Since a large tension output is required when the strip is thicker and the strip has a certain anti-interference ability to tension fluctuation, a larger output torque is required, so the large tension output mode is started. If the target strip thickness h<0.1 mm, the target strip with this thickness is a thinner strip. Since only a small tension output is required when the strip is thinner but the tension fluctuation is required to be very small, a smaller output torque is required, so the micro tension fluctuation mode is started.

[0067] The dot-matrix air cylinder system 400 of the adaptive flexible oil removal system cooperates with the shape control system to control and implement the pre-acting oil removal on the surface of the strip, which is as follows:

[0068] When the strip shape control system of the rolling mill detects that the target strip has defects, a signal is sent to the adaptive flexible oil removal system, and the adaptive flexible oil removal system implements pre-acting oil removal on the surface of the target strip. The pre-acting time t=L / v (i.e., the pre-acting time is positively correlated with the speed of the rolling mill and the relative distance between the oil removal roller and the strip shape roller), where L is the relative distance between the oil removal roller 310 and the strip shape roller of the strip shape control system, and v is the advancing speed of the target strip, i.e., the advancing speed of the strip. Therefore, the obtained t is the time required for the strip to pass through the distance. That is, after the t time detected by the strip shape roller, the defect advances to the oil removal roller at the speed v and is extruded and removed by the oil removal roller.

[0069] Therefore, the strip shape control system detects that the strip shape has defects and sends a signal to the adaptive flexible oil removal system. The adaptive flexible oil removal system will adjust the contact stress for the strip shape accurately after t seconds, such as increasing the contact stress of the area with the wave shape. Through the cooperation control of the strip shape control system, the single-side residual oil amount of the adaptive flexible oil removal system can be controlled to be 120 mg / m2 when the speed of the rolling mill is 600 m / min. 2 .

[0070] In summary, as shown in Figure 1 , the working process of the high-efficiency cold rolling equipment for special alloy precision strips is as follows:

[0071] If the thickness of the strip at the inlet is greater than or equal to 0.1 mm, the large-tension output mode and the strong-contact oil removal mode are adopted, i.e., the master and slave machines of the high-precision cascade power system are both put into use, and all the cylinders of the adaptive flexible oil removal system are put into use;

[0072] If the thickness of the strip at the inlet is less than 0.1 mm, the micro-tension fluctuation mode and the weak-contact oil removal mode are adopted, i.e., only the master machine of the high-precision cascade power system is put into use, and only the three cylinders at the middle and both ends of the adaptive flexible oil removal system are put into use;

[0073] The cylinder system of the adaptive flexible oil removal system is adaptively adjusted according to the strip shape information;

[0074] When the specified product thickness is reached, the rolling is ended.

[0075] The present application automatically executes the input conditions of the power source of the high-precision cascade power system and the cylinders of the adaptive flexible oil removal system according to the thickness information fed back by the thickness measurement system, greatly increases the rollable range of the equipment, and enables both thick strips and thin strips to be efficiently rolled, i.e., the high-precision tension control and accurate oil removal can be implemented on strips with different thickness ranges.

[0076] Those skilled in the art can understand that the above-mentioned embodiments are specific embodiments for implementing the present application, and various changes can be made in form and details in actual application without departing from the spirit and scope of the present application.

Claims

1. A high-efficiency cold rolling equipment for precision strip of special alloys, comprising a thickness measuring system for detecting the thickness of the strip, characterized in that, Also includes: The high-precision cascaded power system has a high-tension output mode and a micro-tension fluctuation mode. Based on the strip thickness obtained by the thickness measurement system, the high-tension output mode or the micro-tension fluctuation mode can be selected to be activated. The adaptive flexible oil removal system has a strong contact oil removal mode and a weak contact oil removal mode. The strong contact oil removal mode or the weak contact oil removal mode is selected to be activated according to the output mode of the high-precision cascaded power system. The high-precision cascaded power system includes a host (100) and a slave (200), wherein the host (100) is equipped with a high-resolution encoder at its tail end, and the slave (200) is installed at the output end of the host (100) and the two are coaxial. The output torque of the host (100) and the slave (200) is the same; When the thickness measurement system detects a target strip thickness h≥s, it activates the high tension output mode, where the high tension output mode means that both the host (100) and the slave (200) are in use; when the thickness measurement system detects a target strip thickness h<s, it activates the micro tension fluctuation mode, where the micro tension fluctuation mode means that only the host (100) is in use. The high-precision cascaded power system is installed on the rolling mill and the coiler located near the rolling mill; When the high tension output mode is activated, the adaptive flexible oil removal system activates the strong contact oil removal mode; When the micro-tension fluctuation mode is activated, the adaptive flexible oil removal system activates the weak contact oil removal mode; The adaptive flexible oil removal system includes an oil removal roller (310) and a support roller (320) tangent to the oil removal roller (310), and a dot matrix cylinder system (400) is arranged at a position away from the tangent plane between the two. All cylinder heads in the dot matrix cylinder system (400) are connected to the support roller (320); The support roller (320) includes a roller shaft, on which multiple roller body segments are distributed. Each roller body segment corresponds to a cylinder of the dot matrix cylinder system (400), and the number of segments of the support roller (320) or the number of cylinders of the dot matrix cylinder system (400) is an odd number. The strong contact oil removal mode refers to all cylinders of the dot matrix cylinder system (400) extending to squeeze the multi-section roller body of the corresponding support roller (320). The weak contact degreasing mode refers to the middle cylinder and the two end cylinders of the dot matrix cylinder system (400) extending out to squeeze the corresponding support roller (320) along the width direction of the target strip, while the other cylinders do not work. Special alloys are iron-carbon alloys formed by adding appropriate amounts of one or more alloying elements to ordinary carbon steel. The target strip thickness h refers to the entry thickness of the target strip; s = 0.1 mm.

2. The high-efficiency cold rolling equipment for special alloy precision strips as described in claim 1, characterized in that: It also includes a strip shape control system for detecting changes in strip shape. When the strip shape control system detects a defect in the target strip, it sends a signal to the adaptive flexible degreasing system. The adaptive flexible degreasing system performs pre-action degreasing on the surface of the target strip. The pre-action time is t = L / v, where L is the relative distance between the degreasing roller (310) and the strip shape roller of the strip shape control system, and v is the forward speed of the target strip.

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