Control device for improving uniform density of copper foil surface

Abstract

The utility model relates to the technical field of electrolytic copper foil, in particular to a control device for improving the uniform density of a copper foil surface, which comprises an encoder, the rotating shaft of the encoder is connected with a meter counting wheel, and the circumferential surface of the meter counting wheel is abutted against the circumferential surface of a cathode roller; the power supply module is electrically connected with the cathode roller and is suitable for providing current for the cathode roller; and the controller is electrically connected with the encoder and the power supply module, is suitable for calculating the instantaneous linear speed of the circumferential surface of the meter counting wheel, and is suitable for controlling the current value provided by the power supply module to the cathode roller based on the instantaneous linear speed of the circumferential surface of the meter counting wheel. According to the application, the instantaneous linear speed of the circumferential surface of the cathode roller is monitored in real time, and the current value provided by the power supply module for the cathode roller is adjusted in real time, so that the density uniformity of the copper foil on the surface of the cathode roller is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic copper foil technology, specifically to a device for controlling the uniform density of copper foil surface. Background Technology

[0002] The production of electrolytic copper foil generally employs a continuous roller electrolysis method. The principle involves immersing a cathode roller in an electrolyte solution and then applying a low-voltage, high-current direct current, causing copper ions from the electrolyte solution to deposit onto the titanium surface of the cathode roller, forming copper foil. Further processing, such as peeling and winding, results in the finished copper foil product. The areal density of the copper foil is affected by the current and the rotational speed of the cathode roller.

[0003] In actual production, the cathode roller is affected by both mechanical installation and precision, and aging issues arise as production time increases, causing unstable rotation speed and affecting the uniformity of copper foil surface density. Existing solutions include adjusting the installation precision of the cathode roller or replacing it, but these methods are cumbersome, and replacing the cathode roller significantly increases production costs. Utility Model Content

[0004] In view of this, the present invention provides a device for controlling the uniform density of copper foil surface, so as to solve the problems of cumbersome process and greatly increased production cost in improving the uniformity of copper foil surface density.

[0005] This utility model provides a device for controlling the uniform density of copper foil surface, used to adjust the surface density of copper foil on the cathode roller, including:

[0006] An encoder, wherein the rotating shaft of the encoder is connected to a measuring wheel, and the circumferential surface of the measuring wheel abuts against the circumferential surface of the cathode roller;

[0007] A power module, electrically connected to the cathode roller, is adapted to provide current to the cathode roller;

[0008] The controller is electrically connected to the encoder and the power module, respectively, and is adapted to calculate the instantaneous linear velocity of the circumferential surface of the measuring wheel, and is adapted to control the current value provided by the power module to the cathode roller based on the instantaneous linear velocity of the circumferential surface of the measuring wheel.

[0009] The circumferential surface of the measuring wheel abuts against the circumferential surface of the cathode roller, causing the cathode roller to rotate and drive the measuring wheel to rotate. The measuring wheel and the cathode roller then have the same instantaneous linear velocity. By calculating the instantaneous linear velocity of the measuring wheel's circumferential surface, the instantaneous linear velocity of the cathode roller's circumferential surface can be determined. The computer obtains a current compensation value based on the instantaneous linear velocity of the cathode roller's circumferential surface and controls the power supply module to provide the compensated current value to the cathode roller. This application improves the uniformity of the copper foil density on the cathode roller surface by real-time monitoring of the instantaneous linear velocity of the cathode roller's circumferential surface and adjusting the current value provided by the power supply module to the cathode roller in real time. The process is simple, and compared to replacing the cathode roller, this application saves production costs.

[0010] In one alternative implementation, it further includes:

[0011] A fixed plate, wherein the encoder is fixedly mounted on the fixed plate, and the rotation shaft of the encoder passes through the fixed plate;

[0012] The adjusting rod is rotatably mounted on the fixed plate;

[0013] An adjusting ring is fitted onto the adjusting rod and is rotatably connected to the adjusting rod.

[0014] A spring, one end of which is fixed to the fixed plate and the other end of which is fixed to the outer wall of the adjusting ring.

[0015] In one alternative implementation, it further includes:

[0016] The first threaded hole is provided on the circumferential surface of the adjusting ring and extends through to the inner wall of the adjusting ring;

[0017] The first bolt is screwed into the first threaded hole and is adapted to abut against the adjusting rod.

[0018] Rotating the adjusting ring stretches the spring, ensuring tight contact between the circumferential surface of the measuring wheel and the circumferential surface of the cathode roller. This prevents relative slippage when the cathode roller drives the measuring wheel, which would cause discrepancies between the calculated instantaneous linear velocity of the measuring wheel and the cathode roller. Therefore, a tight contact between the circumferential surfaces of the measuring wheel and the cathode roller is necessary. Specifically, rotating the adjusting ring in the first direction pulls the spring in that direction, causing the spring to pull the fixed plate, which in turn causes the circumferential surface of the measuring wheel to contact the circumferential surface of the cathode roller. The force of the spring ensures a tight contact between the circumferential surfaces of the measuring wheel and the cathode roller. After adjustment, a first bolt is screwed into the first threaded hole, securing the adjusting rod to the surface of the adjusting rod, thus fixing the adjusting rod and the adjusting ring in a fixed connection. When the adjusting ring is rotated in the second direction, the adjusting ring pulls the spring in the second direction, causing the spring to pull the fixed plate, thereby causing the circumferential surface of the measuring wheel to abut against the circumferential surface of the cathode roller. The force of the spring can make the circumferential surface of the measuring wheel and the circumferential surface of the cathode roller reach a tight abutment. After the adjustment is completed, the first bolt is screwed into the first threaded hole, so that the first bolt abuts against the surface of the adjusting rod, so that the adjusting rod and the adjusting ring are in a fixed connection with each other.

[0019] In one alternative implementation, it further includes:

[0020] The fixed base is provided with a mounting hole, the adjusting rod is inserted into the mounting hole, and an adjusting gap is provided between the mounting hole and the side wall of the fixed base;

[0021] The second threaded hole penetrates the adjustment gap to the side wall of the fixed seat;

[0022] The second bolt is screwed into the second threaded hole and is suitable for adjusting the adjustment gap.

[0023] The second bolt is screwed into the second threaded hole. Tightening the second bolt changes the size of the adjustment gap. When setting the adjustment gap, it should be such that the mounting hole clamps the adjustment rod as the adjustment gap moves from its maximum to its minimum opening. Increasing the opening of the adjustment gap using the second bolt and the second threaded hole adjusts the position of the adjustment rod within the mounting hole, i.e., adjusts the distance between the fixing plate and the fixing seat. Decreasing the opening of the adjustment gap using the second bolt and the second threaded hole fixes the adjustment rod within the mounting hole.

[0024] In one alternative implementation, it further includes:

[0025] A laser shielding plate is connected and disposed at the outer edge of the end side of the cathode roller, and is partially located outside the cathode roller.

[0026] In one alternative implementation, it further includes:

[0027] A laser emitter and a laser receiver are respectively disposed on both sides of the cathode roller. The paired rays formed by the laser emitter and the laser receiver pass through the annular surface formed by the movement path of the laser shield. Each time the cathode roller rotates once, the laser shield will block the paired rays formed by the laser emitter and the laser receiver once, thereby determining the time taken for the cathode roller to rotate once. The average linear velocity of the cathode roller to rotate once can be calculated using the diameter of the cathode roller.

[0028] Both the laser emitter and the laser receiver are connected to the controller. The controller can calculate the average linear velocity of one revolution of the cathode roller using the signals from the laser emitter and the laser receiver.

[0029] In one optional embodiment, the laser transmitter and laser receiver are each provided with a bracket. The bracket can support the laser transmitter and laser receiver. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0032] Figure 2 This is a schematic diagram of the fixing base structure in Embodiment 1 of this utility model;

[0033] Figure 3 This is a schematic diagram showing the position of the laser blocking plate in Embodiment 1 of this utility model;

[0034] Figure 4 This is a flowchart illustrating Embodiment 2 of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Encoder; 2. Meter wheel; 3. Cathode roller; 4. Fixing plate; 5. Adjusting rod; 6. Adjusting ring; 7. Spring; 8. First threaded hole; 9. Fixing seat; 10. Adjustment gap; 11. Second threaded hole; 12. Laser shielding plate; 13. Laser emitter; 14. Laser receiver. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] The production of electrolytic copper foil generally employs a continuous roller electrolysis method. The principle involves immersing a cathode roller in an electrolyte solution and then applying a low-voltage, high-current direct current through a rectifier. This causes copper ions from the electrolyte solution to deposit onto the titanium surface of the cathode roller, forming copper foil. Further processing, such as peeling and winding, results in the final copper foil product. The areal density of the copper foil is affected by the current and the rotational speed of the cathode roller.

[0039] In actual production, the cathode roller is affected by both mechanical installation and precision, and aging issues arise as production time increases, causing unstable rotation speed and affecting the uniformity of copper foil surface density. Existing solutions include adjusting the installation precision of the cathode roller or replacing it, but these methods are cumbersome, and replacing the cathode roller significantly increases production costs.

[0040] The formula for the linear velocity of the cathode roller is as follows: where W is the instantaneous linear velocity of the cathode roller; I is the current value; M is the electrochemical equivalent; η is the current utilization rate; M is the standard weight of the cathode roller; and L is the diameter of the cathode roller.

[0041]

[0042] As can be seen from Formula 1, the weight of copper foil produced per unit time is related to the instantaneous linear velocity W of the cathode roller, the output current I of the rectifier, the current utilization rate η, and the diameter L of the cathode roller. To ensure the uniformity of the thickness, the instantaneous linear velocity of the cathode roller and the current provided by the rectifier are two crucial parameters.

[0043] One or more of the factors mentioned above can cause fluctuations in the detected areal density. Therefore, we consider reducing the non-uniformity of the copper foil areal density and improving its uniformity by real-time detection of the instantaneous linear velocity W of the cathode roller and providing real-time current compensation based on its changes.

[0044] Example 1

[0045] The following is combined with Figures 1 to 3 This describes Embodiment 1 of the present invention.

[0046] This utility model provides a device for controlling the uniform density of copper foil surface, used to adjust the surface density of copper foil on the cathode roller 3, including:

[0047] The encoder 1 has a rotating shaft connected to a measuring wheel 2, the circumferential surface of which abuts against the circumferential surface of the cathode roller 3. To ensure close contact between the circumferential surface of the measuring wheel 2 and the circumferential surface of the cathode roller 3, the measuring wheel 2 can be made of polyurethane material. This material has a relatively high coefficient of friction, which can effectively prevent slippage between it and the cathode roller 3 due to copper sulfate solution sticking to the cathode roller 3. At the same time, polyurethane material is corrosion resistant, which can avoid corrosion caused by contact with copper sulfate solution.

[0048] A power module is electrically connected to the cathode roller 3 and is adapted to provide current to the cathode roller 3; the power module can be a rectifier.

[0049] The controller is electrically connected to the encoder 1 and the power module respectively, and is adapted to calculate the instantaneous linear velocity of the circumferential surface of the measuring wheel 2, and is adapted to control the current value provided by the power module to the cathode roller 3 based on the instantaneous linear velocity of the circumferential surface of the measuring wheel 2.

[0050] The circumferential surface of the measuring wheel 2 abuts against the circumferential surface of the cathode roller 3, causing the cathode roller 3 to rotate and drive the measuring wheel 2 to rotate. The measuring wheel 2 and the cathode roller 3 then have the same instantaneous linear velocity. By calculating the instantaneous linear velocity of the circumferential surface of the measuring wheel 2, the instantaneous linear velocity of the circumferential surface of the cathode roller 3 can be determined. The computer obtains the current compensation value based on the instantaneous linear velocity of the circumferential surface of the cathode roller 3 and controls the power supply module to provide the compensated current value to the cathode roller 3. This application improves the uniformity of the copper foil density on the surface of the cathode roller 3 by real-time monitoring of the instantaneous linear velocity of the circumferential surface of the cathode roller 3 and real-time adjustment of the current value provided by the power supply module to the cathode roller 3.

[0051] The encoder 1 is a rotary encoder 1, which converts the position signal into a pulse signal. The controller captures the pulse signal and restores it to a speed signal using formula 1. Then, formula 2 is used to calculate the current compensation adjustment value for the rectifier. The controller sends the current adjustment value to the rectifier via CAN communication, and the rectifier outputs current according to the value transmitted via CAN communication. The rectifier in this application can be a high-precision rectifier, specifically, a high-precision linear power supply of model TBFBG-250A / 7V or model TBFBG-2500A / 7V. The high-precision rectifier responds quickly to the current adjustment value; the detection time of the instantaneous linear velocity of the cathode roller 3 and the rectifier current output can be less than 20ms, ensuring timely current compensation. The controller may include a processor and a calculator.

[0052] Among them, the high-precision linear power supplies with model numbers TBFBG-250A / 7V or TBFBG-2500A / 7V have the following advantages:

[0053] 1. Small size and light weight: The size and weight are 1 / 5 to 1 / 10 of that of a thyristor electroplating rectifier, which is convenient for planning, expansion, relocation, maintenance and installation.

[0054] 2. Excellent energy saving: Due to the use of high-frequency transformers, the switching power supply has a significantly improved conversion efficiency. Under normal circumstances, the rectifier has an efficiency that is more than 10% higher than that of the thyristor equipment, and when the load rate is below 70%, it has an efficiency that is more than 30% higher than that of the thyristor equipment.

[0055] 3. High output stability: Due to the system's fast response speed (microsecond level), the rectifier has excellent adaptability to changes in grid power and load, and the output accuracy can be better than 1%. The switching power supply has high operating efficiency, resulting in high control precision, which is beneficial to improving product quality.

[0056] 4. Easy-to-modulate output waveform: Due to its high operating frequency, the output waveform adjustment has relatively low processing costs, and the output waveform can be easily changed according to the user's process requirements. This has a strong effect on improving work efficiency and the quality of processed products.

[0057] Formula 1 is:

[0058]

[0059] V is the instantaneous linear velocity of the circumference of the measuring wheel 2, N is the number of pulses generated by the encoder 1 within time T, R is the radius of the measuring wheel 2, and D is the number of pulses generated by the encoder 1 in one revolution. In this embodiment, the value of D can be 5000.

[0060] Formula 2 is the formula for calculating the current adjustment value, that is:

[0061]

[0062] Wherein, V is the instantaneous linear velocity of the circumference of the meter wheel 2, V0 is the set velocity, K is a fixed coefficient, C is the current adjustment value, A is the set current value, and B is the total current rated value.

[0063] In one alternative implementation, it further includes:

[0064] The encoder 1 is fixedly mounted on the fixed plate 4, and the rotation shaft of the encoder 1 passes through the fixed plate 4.

[0065] The adjusting rod 5 is rotatably mounted on the fixed plate 4; the encoder 1 and the adjusting rod 5 can be respectively mounted at both ends of the fixed plate 4. The adjusting rod 5 can be rotatably connected to the fixed plate 4 through a bearing. Specifically, the adjusting rod 5 can pass through the fixed plate 5, and the bearing is located between the fixed plate 4 and the adjusting rod 5.

[0066] An adjusting ring 6 is fitted onto the adjusting rod 5 and is rotatably connected to the adjusting rod 5. A bearing may be provided between the adjusting ring 6 and the adjusting rod 5 so that the adjusting ring 6 and the adjusting rod 5 are rotatably connected.

[0067] Spring 7, one end of which is fixed to the fixed plate 4, and the other end is fixed to the outer wall of the adjusting ring 6.

[0068] In one alternative implementation, it further includes:

[0069] The first threaded hole 8 is provided on the circumferential surface of the adjusting ring 6 and extends through to the inner wall of the adjusting ring 6;

[0070] The first bolt is screwed into the first threaded hole 8 and is adapted to abut against the adjusting rod 5.

[0071] Rotating the adjusting ring 6 stretches the spring 7, causing the circumferential surface of the measuring wheel 2 to tightly abut against the circumferential surface of the cathode roller 3. This prevents relative slippage when the cathode roller 3 drives the measuring wheel 2 to rotate, which would cause an error between the calculated instantaneous linear velocity of the circumferential surface of the measuring wheel 2 and the instantaneous linear velocity of the circumferential surface of the cathode roller 3. Therefore, it is necessary to ensure a tight abutment between the circumferential surfaces of the measuring wheel 2 and the cathode roller 3. Specifically, when the adjusting ring 6 is rotated in the first direction, the adjusting ring 6 pulls the spring 7 in the first direction, causing the spring 7 to pull the fixing plate 4, thereby causing the circumferential surface of the measuring wheel 2 to abut against the circumferential surface of the cathode roller 3. The force of the spring 7 ensures a tight abutment between the circumferential surfaces of the measuring wheel 2 and the cathode roller 3. After adjustment, the first bolt is screwed into the first threaded hole 8, so that the first bolt abuts against the surface of the adjusting rod 5, and the adjusting rod 5 and the adjusting ring 6 are in a fixed connection. When the adjusting ring 6 is rotated in the second direction, the adjusting ring 6 pulls the spring 7 in the second direction, causing the spring 7 to pull the fixed plate 4, thereby causing the circumferential surface of the measuring wheel 2 to abut against the circumferential surface of the cathode roller 3. The force of the spring 7 ensures a tight fit between the circumferential surfaces of the measuring wheel 2 and the cathode roller 3. After adjustment, the first bolt is screwed into the first threaded hole 8, causing the first bolt to abut against the surface of the adjusting rod 5, thus fixing the adjusting rod 5 and the adjusting ring 6 in a fixed connection. The first and second directions are opposite; specifically, the first direction can be clockwise, and the second direction can be counterclockwise.

[0072] Adjusting the adjusting ring 6 and the spring 7 will allow the measuring wheel 2 and the cathode roller 3 to be tightly connected, thus enabling accurate calculation of the instantaneous linear velocity of the cathode roller 3.

[0073] In one alternative implementation, it further includes:

[0074] The fixed base 9 is provided with a mounting hole, the adjusting rod 5 is inserted into the mounting hole, and an adjusting gap 10 is provided between the mounting hole and the side wall of the fixed base 9;

[0075] The second threaded hole 11 penetrates the adjustment gap 10 to the side wall of the fixed seat 9;

[0076] The second bolt is screwed into the second threaded hole 11 and is suitable for adjusting the adjustment gap 10.

[0077] The second bolt is screwed into the second threaded hole 11. Tightening the second bolt changes the size of the adjustment gap 10. When setting the adjustment gap 10, it should be such that the adjustment gap 10, from its maximum opening to its minimum opening, causes the mounting hole to clamp the adjustment rod 5. Increasing the opening of the adjustment gap 10 by using the second bolt and the second threaded hole 11 adjusts the position of the adjustment rod 5 within the mounting hole, i.e., adjusts the distance between the fixing plate 4 and the fixing seat 9. Decreasing the opening of the adjustment gap 10 by using the second bolt and the second threaded hole 11 fixes the adjustment rod 5 within the mounting hole.

[0078] In one alternative implementation, it further includes:

[0079] The laser shielding plate 12 is connected and disposed at the outer edge of the end side of the cathode roller 3, and is partially located outside the cathode roller 3.

[0080] In one alternative implementation, it further includes:

[0081] The laser emitter 13 and the laser receiver 14 are respectively disposed on both sides of the cathode roller 3. The paired rays formed by the laser emitter 13 and the laser receiver 14 pass through the annular surface formed by the movement path of the laser shielding plate 12. Every time the cathode roller 3 rotates once, the laser shielding plate 12 will block the paired rays formed by the laser emitter 13 and the laser receiver 14 once, thereby determining the time taken for the cathode roller 3 to rotate once. The average linear velocity of the cathode roller 3 to rotate once can be calculated using the diameter of the cathode roller 3.

[0082] Both the laser emitter 13 and the laser receiver 14 are connected to the controller. The controller can calculate the average linear velocity of one revolution of the cathode roller 3 using the signals from the laser emitter 13 and the laser receiver 14.

[0083] In one optional embodiment, the laser emitter 13 and the laser receiver 14 are each provided with a bracket. The bracket can support the laser emitter 13 and the laser receiver 14.

[0084] This application employs a laser beam detector to verify the accuracy of the speed obtained by encoder 1. The laser beam detector consists of a laser emitter 13 and a laser receiver 14. An NPN laser beam detector can be selected, and it has VCC, GND, and OUT signals. The laser emitter 13 and laser receiver 14 are respectively mounted on two sides of the cathode roller 3. Each time the cathode roller 3 rotates one revolution, the laser beam is blocked, and the OUT signal of the laser receiver 14 can be received at a low level. Based on the radius of the cathode roller 3, the controller can calculate the average linear velocity of the cathode roller 3 after one revolution. By comparing the average linear velocity of the cathode roller 3 with its instantaneous velocity, the accuracy of the speed calculated by encoder 1 can be verified.

[0085] The advantages of wiring NPN through-beam sensors mainly include the following aspects:

[0086] Simple wiring: NPN through-beam sensors typically require three wires: a power wire, a signal wire, and a ground wire. This wiring method is relatively simple and easy to implement.

[0087] Wide range of applications: NPN sensors are commonly used to detect missing or abnormal objects, such as detecting unauthorized entry into dangerous areas in security systems. Their output signal is active low, making them suitable for applications requiring low-level triggering, such as PLC input modules.

[0088] Flexibility and Reliability: The signal lines of an NPN sensor output a high-level signal when the sensor is not triggered and a low-level signal when the sensor is triggered. This wiring method makes NPN sensors more flexible and reliable in certain applications.

[0089] Strong anti-interference capability: NPN sensors have the advantages of fast response speed and strong anti-interference capability, and can work stably in complex industrial environments.

[0090] Cost-effectiveness: In some applications where cost is a critical factor, NPN sensors are widely used due to their cost-effectiveness.

[0091] Wiring method for NPN through-beam sensor:

[0092] Three-wire wiring: The power wire connects to the positive terminal of the power supply, the signal wire connects to the input terminal of the controller, and the ground wire connects to the negative terminal of the power supply. When the sensor is triggered, the signal wire outputs a low-level signal.

[0093] Four-wire wiring: Four-wire sensor wiring has an extra output wire, which distinguishes between normally open and normally closed. Generally, the black output wire is normally open, and the white output wire is normally closed.

[0094] Example 2

[0095] The following is combined with Figure 4 Embodiment 2 of this utility model is described below.

[0096] This utility model also provides a method for improving the uniform density control of copper foil surface, suitable for the copper foil surface uniform density control device described above, comprising the following steps:

[0097] S1, rotate the adjusting ring 6 so that the circumferential surface of the measuring wheel 2 abuts against the circumferential surface of the cathode roller 3, and tighten the first bolt to fix the adjusting ring 6;

[0098] S2, calculate the instantaneous linear velocity of the circumferential surface of the meter wheel 2 in real time;

[0099] S3, calculate the current adjustment value based on the instantaneous linear velocity of the circumferential surface of the meter wheel 2;

[0100] S4, control the power supply module to output the obtained current adjustment value to the cathode roller 3.

[0101] In one alternative implementation, it further includes:

[0102] S5, calculate the average linear velocity of the cathode roller 3 based on the laser emitter 13 and the laser receiver 14;

[0103] S6, the instantaneous linear velocity of the circumferential surface of the measuring wheel 2 is checked by the average linear velocity of the cathode roller 3.

[0104] In an optional implementation, in step S3, the formula for calculating the current adjustment value is:

[0105]

[0106] Where V is the instantaneous linear velocity of the circumference of the meter wheel 2, V0 is the set velocity, K is a fixed coefficient, C is the current adjustment value, A is the set current value, and B is the total rated current value. It should be noted that A is the setting value of the host computer (controller) and can be changed. The total rated current value generally refers to the maximum allowable output current value of the power module. The range of the set current value A is 0 to B, and the current adjustment value C can be limited, setting its upper and lower limits. For example, if the total rated current B is 20000A, then the set current value A can be 1000, 5000, or 20000A.

[0107] This application uses a specific control algorithm, namely the calculation formula for the current adjustment value, to obtain the adjusted current setpoint, and then transmits this current value to the cathode roller 3, forming a closed loop between the power supply and the cathode roller 3, allowing for continuous adjustment of the cathode roller 3. Compensation power is provided in real time through a control power module, and the magnitude of the current varies with the rotational speed of the cathode roller 3.

[0108] This application calculates the instantaneous linear velocity of the circumferential surface of the measuring wheel 2 in real time, and determines the current adjustment value through the correspondence between the instantaneous linear velocity of the circumferential surface of the measuring wheel 2 (i.e., the instantaneous linear velocity of the circumferential surface of the cathode roller 3) and the current value output by the power supply module to the cathode roller 3. This allows the current value output by the power supply module to the cathode roller 3 to be changed in real time when the instantaneous linear velocity of the circumferential surface of the cathode roller 3 changes, thereby achieving the purpose of improving the uniform density of the copper foil surface.

[0109] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A device for controlling the uniform density of copper foil surface, used to adjust the surface density of copper foil on a cathode roller (3), characterized in that, include: The encoder (1) has a rotating shaft connected to a metering wheel (2), and the circumferential surface of the metering wheel (2) abuts against the circumferential surface of the cathode roller (3). A power supply module, electrically connected to the cathode roller (3), is adapted to provide current to the cathode roller (3); The controller is electrically connected to the encoder (1) and the power module respectively, and is adapted to calculate the instantaneous linear velocity of the circumferential surface of the meter wheel (2), and is adapted to control the current value provided by the power module to the cathode roller (3) based on the instantaneous linear velocity of the circumferential surface of the meter wheel (2).

2. The device for controlling the uniform density of copper foil surface according to claim 1, characterized in that, Also includes: The encoder (1) is fixedly mounted on the fixed plate (4), and the rotation shaft of the encoder (1) passes through the fixed plate (4). Adjusting rod (5) is rotatably mounted on the fixed plate (4); An adjusting ring (6) is fitted onto the adjusting rod (5) and is rotatably connected to the adjusting rod (5); A spring (7) is fixed at one end to the fixed plate (4) and at the other end to the outer wall of the adjusting ring (6).

3. The device for controlling the uniform density of copper foil surface according to claim 2, characterized in that, Also includes: The first threaded hole (8) is provided on the circumferential surface of the adjusting ring (6) and extends through to the inner wall of the adjusting ring (6); The first bolt is screwed into the first threaded hole (8) and is adapted to abut against the adjusting rod (5).

4. The device for controlling the uniform density of copper foil surface according to claim 2, characterized in that, Also includes: The fixed base (9) is provided with a mounting hole, the adjusting rod (5) is inserted into the mounting hole, and an adjusting gap (10) is provided between the mounting hole and the side wall of the fixed base (9); The second threaded hole (11) penetrates the adjustment gap (10) to the side wall of the fixed seat (9); The second bolt is screwed into the second threaded hole (11) and is suitable for adjusting the adjustment gap (10).

5. The device for controlling the uniform density of copper foil surface according to claim 1, characterized in that, Also includes: A laser shielding plate (12) is connected and disposed at the outer edge of the end side of the cathode roller (3), and is partially located outside the cathode roller (3).

6. The device for controlling the uniform density of copper foil surface according to claim 5, characterized in that, Also includes: A laser emitter (13) and a laser receiver (14) are respectively disposed on both sides of the cathode roller (3), and the laser beams formed by the laser emitter (13) and the laser receiver (14) pass through the annular surface formed by the movement path of the laser shield (12); Both the laser transmitter (13) and the laser receiver (14) are connected to the controller.

7. The device for controlling the uniform density of copper foil surface according to claim 6, characterized in that, The laser transmitter (13) and laser receiver (14) are respectively provided with brackets.

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