Ultrasonic circuit board etching machine

Abstract

The utility model relates to an ultrasonic circuit board etching machine which comprises a power supply module, a control module, a temperature sensor, a key module, a display module, a relay, an ultrasonic module and a heater, the power supply module is connected with the control module to supply power to the control module; the temperature sensor is connected with the control module so as to collect the temperature of the corrosion machine and send the temperature to the control module; the key module and the display module are respectively connected with the control module so as to carry out key input and data display; the control module is connected with the relay, and the relay is connected with the ultrasonic module and the heater so as to control the ultrasonic module and the heater to work. The device is simple in structure, small in size and convenient to operate, and the corrosion effect and the working reliability of the device are improved.

Description

Technical Field

[0001] This utility model relates to an ultrasonic circuit board etching machine. Background Technology

[0002] Circuit board etching machines are widely used in university laboratories and small research institutions. Traditional manual etching methods for circuit boards are inefficient and pose safety hazards. With the development of automation technology, automated etching machines are gradually replacing manual operation, combining temperature control, stirring functions, and automatic stop functions to improve etching efficiency and safety. In current technology, single-chip microcomputers are typically used to automate the temperature, time, and stirring processes. While this improves the automation of the etching process, it still suffers from problems such as complex structure and inconvenient operation.

[0003] Chinese patent application CN201621395524.6 discloses a stirring-type intelligent circuit board etching machine. This equipment uses a central processing unit to control temperature, stirring speed, and etching time, and monitors the etching solution concentration via a pressure sensor. A pulsator stirring and lifting mechanism ensures the uniformity of the etching solution and prevents over-etching. However, this solution suffers from problems such as complex equipment structure, large size, and difficult maintenance. Mechanical stirring easily leads to uneven etching solution concentration, affecting the etching effect, and the equipment has poor safety. Utility Model Content

[0004] The purpose of this invention is to provide an ultrasonic circuit board etching machine. This device has a simple structure, small size, and convenient operation, which improves the etching effect and working reliability of the device.

[0005] To achieve the above, the technical solution adopted by this utility model is as follows: an ultrasonic circuit board etching machine, comprising a power supply module, a control module, a temperature sensor, a button module, a display module, a relay, an ultrasonic module, and a heater; the power supply module is connected to the control module to supply power to the control module; the temperature sensor is connected to the control module to collect the temperature of the etching machine and send it to the control module; the button module and the display module are respectively connected to the control module for button input and data display; the control module is connected to the relay, and the relay is respectively connected to the ultrasonic module and the heater to control the operation of the ultrasonic module and the heater.

[0006] Furthermore, the power module includes a transformer, a rectifier circuit, and a voltage regulator circuit. The transformer is connected to a 220V AC power source via a power plug and converts the 220V AC power to 7V AC power. The transformer is connected to the rectifier circuit and the voltage regulator circuit to convert the 7V AC power to 5V DC power and supply power to the control module.

[0007] Furthermore, the voltage regulator circuit uses a three-terminal voltage regulator integrated circuit L7805.

[0008] Furthermore, the control module uses a 51 microcontroller, is powered by a 5V DC power supply, and is oscillated by a 12MHz crystal oscillator and a 30pF capacitor.

[0009] Furthermore, the 51 microcontroller is connected to the relay through ports P1.0 and P1.1, with port P1.0 controlling the output of the ultrasonic module and port P1.1 controlling the output of the heater; the 51 microcontroller is connected to the display module through port P0, to the temperature sensor through port P3.7, and to the button module through ports P2.0, P2.1, and P2.2.

[0010] Furthermore, the temperature sensor is a DS18B20 digital temperature sensor.

[0011] Furthermore, the button module includes three buttons, K1, K2, and K3, used to adjust the working temperature and control the ultrasonic operation.

[0012] Furthermore, the display module adopts an LCD1602 liquid crystal display screen.

[0013] Furthermore, the ultrasonic module includes an ultrasonic generator and a transducer. The ultrasonic waves generated by the ultrasonic generator are converted into mechanical waves by the transducer, thereby stimulating the cavitation effect of the corrosive liquid.

[0014] Compared with the prior art, the present invention has the following advantages: The present invention provides an ultrasonic circuit board etching machine. The device uses ultrasonic cavitation effect instead of mechanical stirring, which not only simplifies the equipment structure, reduces mechanical parts, reduces equipment size and implementation cost, and makes operation more convenient, but also the ultrasonic cavitation effect can uniformly enhance the reaction efficiency of the etching liquid, thereby improving the etching effect and working reliability of the device. Therefore, it is more suitable for use in small scientific research institutions and university laboratories. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the ultrasonic circuit board etching machine according to an embodiment of the present invention;

[0016] Figure 2 This is a circuit diagram of the ultrasonic circuit board etching machine according to an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the transducer in an embodiment of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation 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.

[0020] 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.

[0021] like Figure 1 As shown, this embodiment provides an ultrasonic circuit board etching machine, including a power supply module, a control module, a temperature sensor, a button module, a display module, a relay, an ultrasonic module, and a heater. The power supply module is connected to the control module to supply power to the control module. The temperature sensor is connected to the control module to collect the temperature of the etching machine and send it to the control module. The button module and the display module are respectively connected to the control module for button input and data display. The control module is connected to the relay, and the relay is respectively connected to the ultrasonic module and the heater to control the operation of the ultrasonic module and the heater.

[0022] like Figure 2 As shown, the control module uses an STC89C51 microcontroller, powered by a 5V DC power supply, and oscillates with a 12MHz crystal oscillator and a 30pF capacitor. The microcontroller is connected to a relay via ports P1.0 and P1.1. Port P1.0 controls the output of the ultrasonic module, and port P1.1 controls the output of the heater.

[0023] This device uses 220V / 50Hz AC power, which is then transformed, rectified, and regulated to provide a stable 5V DC power supply to the 51 microcontroller. The power module includes a transformer, a rectifier circuit, and a voltage regulator circuit. The transformer is connected to the 220V AC power supply via a power plug and converts the 220V AC power to 7V AC power. The transformer is connected to the rectifier and voltage regulator circuits to convert the 7V AC power to 5V DC power through rectification and regulation, and then supplies power to the control module. In this embodiment, the voltage regulator circuit uses a three-terminal voltage regulator integrated circuit L7805.

[0024] In this embodiment, the temperature sensor used is a DS18B20 digital temperature sensor. A 51 microcontroller connects to the temperature sensor via its P3.7 port to acquire the temperature of the corrosion machine. By comparing this temperature with a preset operating temperature, the microcontroller controls the heater's on / off state. The DS18B20 temperature sensor employs a single-bus design, outputting a digital signal without the need for AD conversion, allowing the microcontroller to directly read the temperature information. It features fast response, high efficiency, strong anti-interference capabilities, and good corrosion resistance, making it ideal for temperature acquisition in corrosion machines. The DS18B20 operates based on the effect of temperature on the oscillator frequency. A high-temperature-coefficient oscillator generates unstable pulses for processing by a down-counter; a low-temperature-coefficient oscillator generates stable pulses for accumulating the temperature value. When the down-counter reaches 0, the temperature register increments by 1, thus obtaining the temperature information. A slope accumulator is used to compensate for and correct nonlinear errors.

[0025] In this embodiment, the button module includes three buttons, K1, K2, and K3, used to adjust the operating temperature and control the ultrasonic operation. The 51 microcontroller is connected to the button module via ports P2.0, P2.1, and P2.2. Users can adjust the preset temperature and start or stop the ultrasonic function using the buttons.

[0026] The display module uses an LCD1602 liquid crystal display screen. A 51 microcontroller connects to the LCD1602's data display interface via port P0, and controls the LCD1602's Rw, Rs, and En interfaces via ports P2.5, P2.6, and P2.7, respectively. On the LCD1602 liquid crystal display screen, the preset temperature is displayed on the top row, and the real-time temperature is displayed on the bottom row.

[0027] The ultrasonic module includes an ultrasonic generator and a transducer. A high-level output from a 51 microcontroller activates a relay, which in turn generates 60W / 28kHz ultrasonic waves via the ultrasonic generator. The ultrasonic waves generated by the generator are converted into mechanical waves by the transducer, stimulating the cavitation effect in the corrosive liquid and increasing the corrosion rate.

[0028] Ultrasonic transducers utilize the inverse piezoelectric effect to convert electrical energy into mechanical energy; their core component is a ceramic piezoelectric element. When an alternating voltage is applied, the piezoelectric material generates mechanical vibrations at the same frequency as the voltage, thus completing the conversion of electrical energy into mechanical energy. For example... Figure 3As shown, the transducer consists of a sealed housing 1, a resonator 2, a metal sheet 3, a piezoelectric ceramic 4, a base 5, and lead terminals 6. The metal sheet 3 is connected to the piezoelectric ceramic 4 via the lead terminals 6, exciting the ceramic to vibrate under voltage. Ultrasonic transducers are widely used for cavitation effects in liquids. When ultrasound acts on a liquid, the tensile stress inside the liquid generates negative pressure, causing the gas to become supersaturated and form bubbles. These bubbles burst with vibration, releasing energy. The cavitation effect not only accelerates chemical reactions but also significantly increases the corrosion rate, especially in the corrosion treatment of copper-clad laminates, where cavitation accelerates the contact between the corrosive agent and the copper surface.

[0029] The ultrasonic circuit board etching machine provided by this invention utilizes an ultrasonic transducer to generate a cavitation effect, forming uniform microbubbles in the etching solution to enhance its permeability and reaction efficiency. Compared to traditional mechanical stirring, the ultrasonic cavitation effect provides a more uniform liquid flow throughout the etching process, avoiding localized concentration unevenness caused by mechanical stirring and significantly improving etching efficiency. This innovative design simplifies the equipment's mechanical structure, reduces the failure rate, decreases maintenance and upkeep requirements, and thus lowers long-term operating costs.

[0030] Furthermore, this device utilizes an STC89C51 microcontroller to control temperature and ultrasonic operation, eliminating the traditional stirring and lifting mechanisms and simplifying the equipment structure. This not only makes the device more compact, suitable for use in small research institutions and university laboratories, but also significantly reduces manufacturing costs and size. Through optimized circuit design, the entire system is more integrated, improving reliability and economy, avoiding reliance on large mechanical components, making the device more competitive in the market, especially suitable for small-scale applications with limited budgets.

[0031] In addition, this device employs a DS18B20 temperature sensor for temperature control, enabling real-time acquisition of the corrosion solution's temperature data and precise temperature control of the heater via a microcontroller. The LCD1602 display screen allows users to clearly see the comparison between the real-time temperature and the preset temperature, and to adjust the temperature and start or stop the ultrasonic function using buttons, making operation more intuitive and convenient. This design significantly improves the equipment's automation level, avoiding errors inherent in traditional manual operation, while ensuring temperature stability during the corrosion process, preventing over-corrosion or uneven temperature distribution, and improving the reliability and consistency of the corrosion effect.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its scope of protection shall still fall within the protection scope of this utility model.

Claims

1. An ultrasonic circuit board etching machine, characterized in that, The system includes a power supply module, a control module, a temperature sensor, a button module, a display module, a relay, an ultrasonic module, and a heater. The power supply module is connected to the control module to supply power to it. The temperature sensor is connected to the control module to collect the temperature of the corrosion machine and send it to the control module. The button module and the display module are respectively connected to the control module for button input and data display. The control module is connected to the relay, and the relay is respectively connected to the ultrasonic module and the heater to control the operation of the ultrasonic module and the heater.

2. The ultrasonic circuit board etching machine according to claim 1, characterized in that, The power module includes a transformer, a rectifier circuit, and a voltage regulator circuit. The transformer is connected to a 220V AC power source via a power plug and converts the 220V AC power to 7V AC power. The transformer is connected to the rectifier circuit and the voltage regulator circuit to convert the 7V AC power to 5V DC power and supply power to the control module.

3. The ultrasonic circuit board etching machine according to claim 2, characterized in that, The voltage regulator circuit uses the L7805 three-terminal voltage regulator integrated circuit.

4. The ultrasonic circuit board etching machine according to claim 1, characterized in that, The control module uses a 51 microcontroller, is powered by a 5V DC power supply, and is oscillated by a 12MHz crystal oscillator and a 30pF capacitor.

5. An ultrasonic circuit board etching machine according to claim 4, characterized in that, The 51 microcontroller is connected to the relay through ports P1.0 and P1.

1. Port P1.0 controls the output of the ultrasonic module, and port P1.1 controls the output of the heater. The 51 microcontroller is connected to the display module through port P0, to the temperature sensor through port P3.7, and to the button module through ports P2.0, P2.1, and P2.

2.

6. An ultrasonic circuit board etching machine according to claim 1, characterized in that, The temperature sensor used is the DS18B20 digital temperature sensor.

7. An ultrasonic circuit board etching machine according to claim 1, characterized in that, The button module includes three buttons, K1, K2, and K3, which are used to adjust the working temperature and control the ultrasonic operation.

8. An ultrasonic circuit board etching machine according to claim 1, characterized in that, The display module uses an LCD1602 liquid crystal display screen.

9. An ultrasonic circuit board etching machine according to claim 1, characterized in that, The ultrasonic module includes an ultrasonic generator and a transducer. The ultrasonic waves generated by the ultrasonic generator are converted into mechanical waves by the transducer, which excite the cavitation effect of the corrosive liquid.

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