Copper strip eddy current annealing apparatus based on thickness detection

Abstract

The utility model discloses a copper strip eddy current annealing equipment based on thickness detection, include: frame, strip transmission mechanism, it sets up in the frame, is used for transmission copper strip, the strip transmission mechanism includes a plurality of guide roller and drive motor, thickness detection unit, it is used for detecting the thickness of copper strip, thickness detection unit sets up in the frame, and is located the upstream side of the strip transmission mechanism's feed, eddy current heater, it sets up in the frame, is used for the in -process copper strip carries out induction heating, controller, with thickness detection unit and eddy current heater electricity is connected, wherein, the controller is configured as: based on the thickness signal of thickness detection unit feedback, correspondingly adjusts the working power of eddy current heater. The equipment can automatically respond copper strip thickness change and real -time regulation heating parameter to improve the homogeneity of annealing quality further in continuous production process.

Description

Technical Field

[0001] This utility model relates to heat treatment equipment for metal strips, and more particularly to a copper strip eddy current annealing equipment based on thickness detection. Background Technology

[0002] In the field of non-ferrous metal processing, annealing of copper strip is a key process for improving the microstructure and mechanical properties of the material. Continuous annealing production lines are widely used due to their high production efficiency and stable product quality. Among them, eddy current heating technology based on the principle of electromagnetic induction has become one of the mainstream heating methods for modern copper strip heat treatment due to its high thermal efficiency and fast response speed. This technology achieves rapid heating by inducing eddy currents inside the copper strip through an alternating magnetic field. The equipment typically consists of a frame, a strip conveying system, and induction heaters arranged along the conveying path.

[0003] However, in actual production, the thickness of incoming copper strips may fluctuate within a certain range, or different specifications of products may need to be processed due to adjustments in production plans. Existing eddy current annealing equipment mostly adopts a preset constant power operating mode, making it difficult to adjust the heating power in real time according to changes in strip thickness. For example, for thicker copper strips, a fixed power may lead to insufficient core heating and incomplete recrystallization; for thinner copper strips, there is a risk of surface overheating and grain coarsening. Furthermore, some equipment attempts to address thickness variations through manual monitoring and adjustment, but this method suffers from response lag and limited adjustment precision, potentially affecting product performance consistency and reducing energy efficiency.

[0004] Therefore, it is necessary to design an annealing equipment that can automatically respond to changes in copper strip thickness and adjust heating parameters in real time, so as to further improve the uniformity of annealing quality in continuous production. Utility Model Content

[0005] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a copper strip eddy current annealing device based on thickness detection. This device can automatically respond to changes in copper strip thickness and adjust heating parameters in real time, thereby further improving the uniformity of annealing quality during continuous production.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a copper strip eddy current annealing device based on thickness detection, comprising:

[0008] frame;

[0009] A strip conveying mechanism, mounted on the frame, is used to convey copper strip; the strip conveying mechanism includes multiple guide rollers and a drive motor for driving the guide rollers to rotate; the multiple guide rollers are rotatably mounted on the frame via bearing seats;

[0010] A thickness detection unit is used to detect the thickness of the copper strip; the thickness detection unit is disposed on the frame and located upstream of the feed of the strip conveying mechanism;

[0011] An eddy current heater, which is mounted on the frame and located on one or both sides of the copper strip's transport path, is used to induction heat the copper strip as it travels.

[0012] A controller, which is electrically connected to the thickness detection unit and the eddy current heater;

[0013] in,

[0014] The controller is configured to adjust the operating power of the eddy current heater accordingly based on the thickness signal fed back by the thickness detection unit.

[0015] Furthermore, there are multiple eddy current heaters; the multiple eddy current heaters are arranged on the frame along the traveling direction of the copper strip.

[0016] Furthermore, the spacing between adjacent eddy current heaters is equal.

[0017] Furthermore, along the traveling direction of the copper strip, the spacing between adjacent eddy current heaters increases in an arithmetic sequence, with a common ratio in the range of 1.1 to 1.5.

[0018] Furthermore, further includes:

[0019] A temperature sensor is used to detect the surface temperature of the copper strip; the temperature sensor is mounted on the frame and electrically connected to the controller;

[0020] The controller is further configured to:

[0021] In response to the temperature signal fed back by the temperature sensor, the operating power of the downstream eddy current heater adjacent to the temperature sensor is adjusted compensatorily.

[0022] Furthermore, there are multiple temperature sensors; these multiple temperature sensors are arranged on the frame along the traveling direction of the copper strip.

[0023] Furthermore, the plurality of eddy current heaters and the plurality of temperature sensors are arranged alternately along the traveling direction of the copper strip.

[0024] This utility model has at least the following advantages or beneficial effects:

[0025] This invention employs a strip conveying mechanism mounted on a frame, which can continuously and stably transport copper strip. It also incorporates a thickness detection unit located upstream of the feed, which acquires real-time thickness information of the copper strip. Furthermore, it utilizes a controller electrically connected to the thickness detection unit and the eddy current heater, which adjusts the heating power accordingly based on the thickness signal. Overall, this invention enables automatic adaptation of annealing power to copper strips of different thicknesses, contributing to improved consistency in the annealing process.

[0026] This invention employs a temperature sensor mounted on the frame to detect the actual surface temperature of the copper strip; it also uses a controller with compensation and adjustment functions, which can fine-tune the power of the downstream adjacent eddy current heater based on the temperature signal. Overall, this invention introduces temperature feedback on the basis of open-loop thickness control, which can correct for temperature deviations caused by factors such as fluctuations in incoming material temperature or heat dissipation. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of a copper strip eddy current annealing equipment based on thickness detection.

[0029] Figure 2 A front view of a copper strip eddy current annealing equipment based on thickness detection;

[0030] Figure 3 This is a top view of a copper strip eddy current annealing equipment based on thickness detection.

[0031] Figure label:

[0032] 1-Frame; 2-Strip conveying mechanism; 21-Guide roller; 3-Thickness detection unit; 4-Eddy current heater; 5-Temperature sensor; 6-Copper strip. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of this application. Unless otherwise specified, all 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 pertains.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] In this utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various parts or elements of this utility model and do not specifically refer to any part or element in this utility model. They should not be construed as limitations on this utility model.

[0037] In this utility model, terms such as "fixed", "connected", and "linked" should be interpreted broadly, indicating that it can be a fixed connection, an integral connection, or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For relevant scientific researchers or technicians in this field, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and should not be construed as a limitation of this utility model.

[0038] The embodiments of this utility model will be described in detail below.

[0039] This utility model discloses a copper strip eddy current annealing device based on thickness detection.

[0040] Figure 1 A schematic diagram of a copper strip eddy current annealing equipment based on thickness detection. Figure 2 A front view of a copper strip eddy current annealing equipment based on thickness detection; Figure 3 This is a top view of a copper strip eddy current annealing equipment based on thickness detection.

[0041] The frame 1 constitutes the main support structure of the equipment, and its function is to provide the installation foundation and spatial positioning for each functional component.

[0042] In this embodiment, the frame 1 is welded from structural steel; in other embodiments, the frame 1 may also be a plate welded structure or a bolted combined frame.

[0043] The strip conveying mechanism 2 is mounted on the frame 1, and its function is to continuously and smoothly convey the copper strip 6 through the annealing zone.

[0044] The strip conveying mechanism 2 includes multiple guide rollers 21 and a drive motor (not shown in the figure) for driving the guide rollers 21 to rotate. The multiple guide rollers 21 are rotatably mounted on the frame 1 via bearing seats.

[0045] The surface of the guide roller 21 is usually chrome-plated or sprayed with hard ceramic to reduce wear on the surface of the copper strip 6.

[0046] The drive motor is connected to the transmission shaft through a reducer, providing stable rotational power for the guide roller 21.

[0047] The thickness detection unit 3 is set on the frame 1 and located upstream of the feed of the strip conveying mechanism 2. Its function is to detect the thickness of the copper strip 6 in real time before it enters the heating zone.

[0048] The thickness detection unit 3 can employ a laser rangefinder to acquire thickness data non-contactly using triangulation; alternatively, it can use an ultrasonic thickness gauge or a X-ray thickness gauge. In this embodiment, an ultrasonic thickness gauge is selected for the thickness detection unit 3; in other embodiments, depending on measurement accuracy and cost considerations, the thickness detection unit 3 can also be a laser rangefinder.

[0049] The eddy current heater 4 is mounted on the frame 1 and located on one or both sides of the copper strip 6 transmission path. Its function is to generate eddy currents inside the copper strip 6 through the principle of electromagnetic induction, thereby achieving rapid heating.

[0050] In this embodiment, the eddy current heater 4 is arranged on one side of the copper strip 6; in other embodiments, in order to obtain a more uniform heating effect, the eddy current heater 4 can be symmetrically arranged on both sides of the copper strip 6.

[0051] The controller (not shown in the figure) is electrically connected to the thickness detection unit 3 and the eddy current heater 4. Its function is to receive the thickness signal and adjust the heating power accordingly. The controller can be a programmable logic controller or an industrial computer, which has pre-stored thickness-power correspondence data.

[0052] In a preferred embodiment of this invention, there are multiple eddy current heaters 4, which are arranged on the frame 1 along the traveling direction of the copper strip 6. This arrangement can divide the annealing process into multiple heating zones.

[0053] In this embodiment, the spacing between adjacent eddy current heaters 4 is equal, and this equal spacing layout helps to ensure the uniformity of the heat field distribution. In another embodiment, along the traveling direction of the copper strip 6, the spacing between adjacent eddy current heaters 4 increases in an arithmetic sequence with a common ratio in the range of 1.1 to 1.5. This gradually increasing spacing design can adapt to the characteristics of the change in heat capacity of the copper strip 6 during the heating process.

[0054] In this embodiment, the core working logic of the controller is open-loop control based on a preset thickness-power mapping table. Specifically, the controller internally stores a data table that defines the base power values ​​of the eddy current heater 4 corresponding to different thickness ranges of the copper strip 6. When the thickness detection unit 3 detects the thickness signal of the copper strip 6 and transmits it to the controller, the controller first filters the thickness signal to eliminate instantaneous fluctuations, then queries the data table to find the range to which the current thickness belongs, and retrieves the corresponding base power setting value. Finally, the controller sends an analog signal or digital command to the power adjustment unit (such as a power regulator) to adjust the operating power of the eddy current heater 4 to the target value. For example, when a copper strip 6 with a thickness of 5mm is detected, the controller finds that the corresponding power should be 50kW and immediately sets the power of the eddy current heater 4 to this value. This logic structure is simple, responds quickly, and is suitable for production scenarios where the thickness of the incoming material does not change frequently and the process requirements are relatively stable.

[0055] Temperature sensor 5 is mounted on frame 1 and electrically connected to controller. Its function is to detect the actual surface temperature of copper strip 6.

[0056] Temperature sensor 5 can be an infrared thermometer to acquire temperature data in a non-contact manner.

[0057] In this embodiment, there are multiple temperature sensors 5, which are arranged on the frame 1 along the traveling direction of the copper strip 6 to form a multi-point temperature monitoring network.

[0058] Multiple eddy current heaters 4 and multiple temperature sensors 5 are arranged alternately along the traveling direction of the copper strip 6. This arrangement allows upstream temperature feedback information to be obtained before each heating section. In this embodiment, the ratio of eddy current heaters 4 to temperature sensors 5 is 1:1; in other embodiments, depending on the control accuracy requirements, the number of temperature sensors 5 can be greater than the number of eddy current heaters 4, for example, two temperature sensors 5 can be set to correspond to one eddy current heater 4.

[0059] The controller is further configured to compensate for the operating power of the downstream eddy current heater 4 adjacent to the temperature sensor 5 in response to the temperature signal fed back by the temperature sensor 5. This control strategy can correct temperature deviations caused by fluctuations in incoming material temperature or ambient heat dissipation.

[0060] The controller's operating logic, based on open-loop thickness control, incorporates feedback from temperature sensor 5 to form a closed-loop correction. Under this logic, the controller first sets a base power based on the signal from thickness detection unit 3. Then, the controller continuously reads the actual surface temperature of the copper strip 6 from the temperature sensor 5 located upstream of the eddy current heater 4. The controller internally sets a target annealing temperature range, for example, 400℃ ± 10℃. The controller compares the actual temperature with the median of the target temperature. If the actual temperature remains below the target range, a power compensation amount is calculated according to a preset PID algorithm or fuzzy logic algorithm and added to the base power of the downstream adjacent eddy current heater 4; conversely, if the actual temperature is too high, a corresponding power reduction is implemented. For example, even if the thickness of the copper strip 6 is constant, if the temperature of the copper strip 6 is too low when it enters the second heating zone due to a decrease in ambient temperature, the controller can automatically increase the power of the eddy current heater 4 in that zone to maintain a stable final annealing temperature. This logic improves the system's anti-interference capability and process stability.

[0061] In another embodiment, the controller's operating logic is further upgraded to multi-segment coordinated and predictive control. This logic is applied to a system configured with multiple alternating eddy current heaters 4 and temperature sensors 5. The controller not only adjusts the adjacent downstream eddy current heaters 4 based on feedback from the local temperature sensor 5, but also performs coordinated optimization of the power distribution across the entire line. An internal simplified thermal process model is established within the controller, capable of predicting the temperature trend of the copper strip 6 as it enters subsequent heating zones based on the reading sequence of multiple upstream temperature sensors 5. Based on this prediction, the controller pre-adjusts the power setpoints of one or more subsequent eddy current heaters 4, rather than passively waiting for temperature deviations to occur before correction. For example, when the controller determines from the temperature data of the first two temperature zones that the heating rate of the copper strip 6 is lower than expected, it will pre-adjust appropriately to increase the power of the eddy current heaters 4 in the third and even fourth zones, without waiting for the temperature sensor 5 in the third zone to report a low temperature. This feedforward-feedback composite control logic helps reduce overshoot and fluctuations in the overall line temperature, achieving smoother and more accurate temperature rise curve control, which is of positive significance for handling high-end copper strip 6 products with frequent thickness changes or extremely high requirements for thermal history.

[0062] Overall, this utility model combines a frame 1, a strip conveying mechanism 2, a thickness detection unit 3, an eddy current heater 4, a temperature sensor 5, and a controller. To a certain extent, it can achieve automatic detection of the thickness of the copper strip 6 and real-time matching of the heating power, and perform closed-loop compensation adjustment of the annealing temperature. It has a certain positive effect on improving the uniformity of annealing quality and energy efficiency.

[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A copper strip eddy current annealing equipment based on thickness detection, characterized in that, include: Rack (1); A strip conveying mechanism (2) is mounted on the frame (1) for conveying copper strips; the strip conveying mechanism (2) includes a plurality of guide rollers (21) and a drive motor for driving the guide rollers (21) to rotate; the plurality of guide rollers (21) are rotatably mounted on the frame (1) via bearing seats; Thickness detection unit (3) is used to detect the thickness of the copper strip; the thickness detection unit (3) is disposed on the frame (1) and located on the upstream side of the feed of the strip conveying mechanism (2); Eddy current heater (4), which is disposed on the frame (1) and located on one or both sides of the transmission path of the copper strip, is used to induction heat the copper strip in motion; The controller is electrically connected to the thickness detection unit (3) and the eddy current heater (4); in, The controller is configured to adjust the operating power of the eddy current heater (4) based on the thickness signal fed back by the thickness detection unit (3).

2. The copper strip eddy current annealing equipment based on thickness detection according to claim 1, characterized in that, There are multiple eddy current heaters (4); the multiple eddy current heaters (4) are arranged on the frame (1) along the traveling direction of the copper strip.

3. The copper strip eddy current annealing equipment based on thickness detection according to claim 2, characterized in that, The spacing between adjacent eddy current heaters (4) is equal.

4. The copper strip eddy current annealing equipment based on thickness detection according to claim 2, characterized in that, Along the traveling direction of the copper strip, the spacing between adjacent eddy current heaters (4) increases in an arithmetic sequence with a common ratio in the range of 1.1 to 1.

5.

5. The copper strip eddy current annealing equipment based on thickness detection according to claim 2, characterized in that, Further includes: A temperature sensor (5) is used to detect the surface temperature of the copper strip; the temperature sensor (5) is mounted on the frame (1) and electrically connected to the controller; The controller is further configured to: In response to the temperature signal fed back by the temperature sensor (5), the operating power of the downstream eddy current heater (4) adjacent to the temperature sensor (5) is adjusted compensatorily.

6. The copper strip eddy current annealing equipment based on thickness detection according to claim 5, characterized in that, The number of temperature sensors (5) is multiple; multiple temperature sensors (5) are arranged on the frame (1) along the traveling direction of the copper strip.

7. The copper strip eddy current annealing equipment based on thickness detection according to claim 6, characterized in that, Multiple eddy current heaters (4) and multiple temperature sensors (5) are arranged alternately along the traveling direction of the copper strip.

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