TIG-II type control equipment and method for pulsed argon arc welding machine

Abstract

The invention relates to the technical field of welding equipment control, in particular to pulsed argon arc welding machine TIG-II type control equipment which comprises a single chip microcomputer, a power supply chip, a Hall sensor and a storage chip. The single-chip microcomputer is used for executing full-digital processing and multi-mode control of welding parameters and receiving secondary output voltage signals and welding current signals. The Hall sensor is used for collecting a welding current signal in real time and feeding back the welding current signal to the single chip microcomputer; the power supply chip is connected with the single-chip microcomputer and adjusts welding current output through pulse width modulation signals. And the storage chip is in communication connection with the single-chip microcomputer, realizes storage and calling of user data, realizes storage of user parameters, and supports storage and selection of common parameters. The problems that existing welding equipment is single in function and complex in operation are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment control, and more specifically, to a pulse argon arc welding machine TIG-II type control device and method. Background Art

[0002] At present, the pulse argon arc welding machine is an argon arc welding machine with a pulse adjustment function. A high-frequency signal is generated by a high-frequency generator to switch the argon arc between the positive half-cycle and the negative half-cycle, thereby generating a pulse signal, which makes the welding current change periodically and realizes fine-tuning and control of the welding current. The pulse argon arc welding machine uses a tungsten electrode and a non-melting electrode. Argon gas protects the welding pool. During the welding process, the welding current has two currents, a base value and a peak value, which change alternately.

[0003] Most pulse welding machines use analog circuits, using operational amplifiers, resistors, and capacitors to achieve control functions, delay circuits, and display circuits. Some pulse welding machines use microprocessors to achieve control and display functions, making the control of welding equipment more flexible and also improving the stability and reliability of the equipment. However, these devices often have relatively simple functions and are complex to operate. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing welding equipment has single functions and complex operations. In view of the above-mentioned defects of the prior art, a control method, equipment and circuit of a pulse argon arc welding machine TIG-II are provided.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] First aspect

[0007] A pulse argon arc welding machine TIG-II type control device, including a single chip microcomputer, a power chip, a Hall sensor and a storage chip;

[0008] The single chip microcomputer is used to perform full digital processing and multi-mode control of welding parameters and receive secondary output voltage signals and welding current signals;

[0009] The Hall sensor is used to collect welding current signals in real time and feed them back to the single chip microcomputer;

[0010] The power chip is connected to the single chip computer and adjusts the welding current output through a pulse width modulation signal;

[0011] The storage chip is connected to the single-chip microcomputer for communication, and realizes the storage and calling of user data, the storage of user parameters, and the support of the saving and selection of commonly used parameters.

[0012] Preferably, the single chip microcomputer is also connected to a signal processing module and a welding circuit; the signal processing module includes an analog-to-digital converter ADC and a digital-to-analog converter DAC;

[0013] The analog-to-digital converter ADC converts the analog signal output by the Hall sensor into a digital signal and performs digital anti-interference processing;

[0014] The digital-to-analog converter DAC converts the digital control signal output by the single-chip microcomputer into an analog driving signal to drive the subsequent circuit to work;

[0015] The welding circuit integrates an inverter power supply topology, an overcurrent protection circuit, an overvoltage protection circuit and a temperature sensing circuit, receives the output signal of the digital-to-analog converter DAC and executes the welding result.

[0016] Preferably, the signal processing module further includes a digital filtering unit and a dynamic compensation unit;

[0017] Digital filtering unit, which performs dynamic window averaging on the collected signal to suppress high-frequency noise;

[0018] The dynamic compensation unit adjusts the response speed of the current output according to the difference in thermal conductivity of the welding materials to optimize the welding effect.

[0019] Preferably, the single chip microcomputer controls the output time and amplitude of the welding current through the μs level response time, and reads the welding gun switch signal in real time to realize the 2T / 4T function, wherein:

[0020] The 2T function corresponds to the welding gun switch acting twice to control the start and stop of welding;

[0021] The 4T function corresponds to four actions of the welding gun switch to control the start and stop of welding and the slow increase and decrease of current.

[0022] Second aspect

[0023] A control method for a pulse argon arc welding machine TIG-II type, comprising the steps of:

[0024] Closed-loop regulation: The pulse width of the power chip is controlled by the single-chip computer program, and the output voltage signal obtained and the current signal fed back by the secondary Hall sensor are combined to achieve closed-loop regulation;

[0025] Signal digital processing: Use high-speed analog-to-digital converter ADC to digitize welding current and voltage signals, and suppress interference through digital filtering algorithm;

[0026] Cold welding control: cold welding is achieved through mS level time control;

[0027] User data storage and call: User data storage and call are realized through single-chip microcomputer and storage chip.

[0028] Preferably, the method further comprises a signal digitization processing flow, comprising the steps of:

[0029] Convert the current and voltage analog signals in the welding process into digital signals;

[0030] Perform digital anti-interference processing on each signal;

[0031] Combined with the user-set parameters, process analysis and function calculation are performed to obtain processing results;

[0032] The processing results are converted into analog signals to drive the subsequent circuits to work.

[0033] Preferably, it also includes a user control point digital transformation process, and the specific steps include:

[0034] The user sets the pulse parameters, and the processor reads the set parameters, controls the power chip, current size, and gas valve to achieve the user-set pulse argon arc welding;

[0035] The response time of the processor US level controls the output time and output current of the machine;

[0036] The processor reads the welding gun switch signal, controls the machine to start and stop, and the output current;

[0037] The processor stores user parameters in real time. When the user needs to store commonly used parameters, he selects the channel and confirms it. The processor will copy the data to be stored to the storage chip.

[0038] Preferably, in the control method, within the time interval of the cold welding control, the single chip microcomputer controls the power chip to stop current output to reduce the temperature of the welding area.

[0039] Preferably, the dynamic compensation unit adjusts the current response speed according to the thermal conductivity of the welding material, specifically including:

[0040] For materials with high thermal conductivity, the current response speed is increased by 20%;

[0041] For low thermal conductivity materials, the pulse width is increased and the response speed is decreased.

[0042] The beneficial effects of the present invention are:

[0043] 1. The integrated layout of the display panel and the control panel realizes the multifunctional integration of the welding machine, including manual arc welding, argon arc welding, pulse argon arc welding, cold welding argon arc welding, etc., which improves the practicality and flexibility of the equipment, reduces the size of the equipment, reduces the production cost, and improves the market competitiveness of the equipment;

[0044] 2. The full digital adjustment, calculation and processing are adopted to realize the digitalization of user settings, digitalization of control and digitalization of user control points, thus improving the accuracy and stability of the welding process;

[0045] 3. Through the single-chip computer program, the working time and interval time can be controlled at the mS level, so that the cold welding will not turn black, which improves the appearance and quality of the welding surface and reduces the waste of materials and energy consumption;

[0046] 4. It provides multiple functional modes such as 2T / 4T to meet the welding needs of different users. The processor stores user data parameters in real time to ensure the integrity and security of the data, making it convenient for users to call and modify it at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0048] Figure 1 It is a schematic diagram of a control device of a preferred embodiment of the present invention.

[0049] Figure 2 1 is a control circuit diagram of a control device according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0051] Reference Figure 1 and Figure 2 The embodiment of the present application discloses a pulse argon arc welding machine TIG-II type control device and method.

[0052] Example 1

[0053] A pulse argon arc welding machine TIG-II type control device, including a single chip microcomputer, a power chip, a Hall sensor and a storage chip;

[0054] A single chip microcomputer is used to perform full digital processing and multi-mode control of welding parameters and receive secondary output voltage signals and welding current signals;

[0055] Hall sensor, used to collect welding current signal in real time and feed it back to the microcontroller;

[0056] A power chip is connected to the single-chip microcomputer and adjusts the welding current output through a pulse width modulation signal; as an optional embodiment, the power chip is set to a UC3846 chip, and the output current is dynamically adjusted through the PWM signal of the single-chip microcomputer, and the control accuracy is ±1%;

[0057] The storage chip communicates with the microcontroller and realizes the storage and call of user data, the storage of user parameters, and the support of the saving and selection of commonly used parameters. The storage chip supports the storage and call of 5 groups of user parameters, and has an overwrite protection mechanism to prevent data loss due to misoperation.

[0058] The signal processing module includes an analog-to-digital converter ADC and a digital-to-analog converter DAC.

[0059] Analog-to-digital converter ADC converts the analog signal output by the Hall sensor into a digital signal and performs digital anti-interference processing;

[0060] The digital-to-analog converter DAC converts the digital control signal output by the microcontroller into an analog drive signal to drive the subsequent circuit to work;

[0061] The welding circuit integrates an inverter power supply topology, an overcurrent protection circuit, an overvoltage protection circuit and a temperature sensing circuit, receives an output signal of a digital-to-analog converter DAC and executes a welding result.

[0062] The signal processing module also includes a digital filtering unit and a dynamic compensation unit;

[0063] Digital filtering unit, which performs dynamic window averaging on the collected signal to suppress high-frequency noise;

[0064] The dynamic compensation unit adjusts the response speed of the current output according to the difference in thermal conductivity of the welding materials to optimize the welding effect.

[0065] The dynamic compensation unit adjusts the current response speed according to the thermal conductivity of the welding material, including:

[0066] For materials with high thermal conductivity, the current response speed is increased by 20%;

[0067] For low thermal conductivity materials, the pulse width is increased and the response speed is decreased.

[0068] The single chip microcomputer controls the output time and amplitude of the welding current through the μs-level response time, and reads the welding gun switch signal in real time to realize the 2T / 4T function, where:

[0069] The 2T function corresponds to the welding gun switch acting twice to control the start and stop of welding;

[0070] The 4T function corresponds to the four actions of the welding gun switch to control the welding start and stop and the current slow rise and fall

[0071] Example 2

[0072] A control method for a pulse argon arc welding machine TIG-II type, comprising the steps of:

[0073] Closed-loop regulation: The pulse width of the power chip is controlled by the single-chip computer program, and the output voltage signal obtained and the current signal fed back by the secondary Hall sensor are combined to achieve closed-loop regulation;

[0074] Signal digital processing: Use high-speed analog-to-digital converter ADC to digitize welding current and voltage signals, and suppress interference through digital filtering algorithm;

[0075] Cold welding control: cold welding is achieved through mS-level time control, with the welding time set to 10-200ms and the interval time to 200-999ms;

[0076] User data storage and call: User data storage and call are realized through single-chip microcomputer and storage chip.

[0077] It also includes the signal digitization process, including the steps:

[0078] Convert the current and voltage analog signals in the welding process into digital signals;

[0079] Perform digital anti-interference processing on each signal;

[0080] Combined with the user-set parameters, process analysis and function calculation are performed to obtain processing results;

[0081] The processing results are converted into analog signals to drive the subsequent circuits to work.

[0082] It also includes the digital transformation process of user control points, including the following steps:

[0083] The user sets the pulse parameters, and the processor reads the set parameters, controls the power chip, current size, and gas valve to achieve the user-set pulse argon arc welding;

[0084] The response time of the processor US level controls the output time and output current of the machine;

[0085] The processor reads the welding gun switch signal, controls the machine to start and stop, and the output current;

[0086] The processor stores user parameters in real time. When the user needs to store commonly used parameters, he selects the channel and confirms it. The processor will copy the data to be stored to the storage chip.

[0087] In the control method, the cold welding time range is 10-200ms, and the interval time range is 200-999ms.

[0088] In the control method, within the time interval of cold welding control, the single chip microcomputer controls the power chip to stop current output to reduce the temperature of the welding area.

[0089] The implementation principle of the embodiment of the present application is: based on a fully digital welding process management system controlled by a single-chip microcomputer, the pulse width of the power chip is accurately controlled by the single-chip microcomputer program, and the closed-loop regulation of the welding current is realized by combining the real-time feedback of the Hall sensor. At the same time, the analog-to-digital converter ADC and the digital-to-analog converter DAC are used to realize the digital processing of the welding signal, which improves the signal's anti-interference negligible and control accuracy. In addition, the storage and call of user data are realized through the storage chip, which improves the user-friendliness and intelligence level of the equipment. In terms of cold welding, the high-quality aesthetics of the welding surface is achieved through precise time control. On the whole, the present invention significantly improves the performance and user experience of the pulse argon arc welding machine through highly integrated hardware design and advanced control algorithms.

[0090] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A pulse argon arc welding machine TIG-II type control device, characterized in that: Including single chip microcomputer, power chip, Hall sensor and storage chip; The single chip microcomputer is used to perform full digital processing and multi-mode control of welding parameters and receive secondary output voltage signals and welding current signals; The Hall sensor is used to collect welding current signals in real time and feed them back to the single chip microcomputer; The power chip is connected to the single chip computer and adjusts the welding current output through a pulse width modulation signal; The storage chip is connected to the single-chip microcomputer for communication, and realizes the storage and calling of user data, the storage of user parameters, and the support of the saving and selection of commonly used parameters.

2. A pulse argon arc welding machine TIG-II type control device according to claim 1, characterized in that: The single chip microcomputer is also connected to a signal processing module and a welding circuit; the signal processing module includes an analog-to-digital converter ADC and a digital-to-analog converter DAC; The analog-to-digital converter ADC converts the analog signal output by the Hall sensor into a digital signal and performs digital anti-interference processing; The digital-to-analog converter DAC converts the digital control signal output by the single-chip microcomputer into an analog driving signal to drive the subsequent circuit to work; The welding circuit integrates an inverter power supply topology, an overcurrent protection circuit, an overvoltage protection circuit and a temperature sensing circuit, receives the output signal of the digital-to-analog converter DAC and executes the welding result.

3. The control device of a pulse argon arc welding machine TIG-II type according to claim 2, characterized in that: The signal processing module also includes a digital filtering unit and a dynamic compensation unit; Digital filtering unit, which performs dynamic window averaging on the collected signal to suppress high-frequency noise; The dynamic compensation unit adjusts the response speed of the current output according to the difference in thermal conductivity of the welding materials to optimize the welding effect.

4. The control device of a pulse argon arc welding machine TIG-II type according to claim 1, characterized in that: The single chip microcomputer controls the output time and amplitude of the welding current through the μs level response time, and reads the welding gun switch signal in real time to realize the 2T / 4T function, wherein: The 2T function corresponds to the welding gun switch acting twice to control the start and stop of welding; The 4T function corresponds to four actions of the welding gun switch to control the start and stop of welding and the slow increase and decrease of current.

5. A control method for a pulse argon arc welding machine TIG-II, characterized in that: Includes steps: Closed-loop regulation: The pulse width of the power chip is controlled by the single-chip computer program, and the output voltage signal obtained and the current signal fed back by the secondary Hall sensor are combined to achieve closed-loop regulation; Signal digital processing: Use high-speed analog-to-digital converter ADC to digitize welding current and voltage signals, and suppress interference through digital filtering algorithm; Cold welding control: cold welding is achieved through mS level time control; User data storage and call: User data storage and call are realized through single-chip microcomputer and storage chip.

6. The control method of a pulse argon arc welding machine TIG-II according to claim 5, characterized in that: It also includes the signal digitization process, including the steps: Convert the current and voltage analog signals in the welding process into digital signals; Perform digital anti-interference processing on each signal; Combined with the user-set parameters, process analysis and function calculation are performed to obtain processing results; The processing results are converted into analog signals to drive the subsequent circuits to work.

7. The control method of a pulse argon arc welding machine TIG-II according to claim 5, characterized in that: It also includes the digital transformation process of user control points, including the following steps: The user sets the pulse parameters, and the processor reads the set parameters and controls the power chip, current size, and gas valve to achieve the user-set pulse argon arc welding; The response time of the processor US level controls the output time and output current of the machine; The processor reads the welding gun switch signal, controls the machine to start and stop, and the output current; The processor stores user parameters in real time. When the user needs to store commonly used parameters, he selects the channel and confirms it. The processor will copy the data to be stored to the storage chip.

8. A pulse argon arc welding machine TIG-II type control method according to claim 5, characterized in that: In the control method, the current control accuracy is ±1%, and the slow-up and slow-down time are dynamically adjustable.

9. A pulse argon arc welding machine TIG-II type control method according to claim 5, characterized in that: In the control method, within the time interval of the cold welding control, the single chip microcomputer controls the power chip to stop current output to reduce the temperature of the welding area.

10. A pulse argon arc welding machine TIG-II type control method according to claim 3, characterized in that: The dynamic compensation unit adjusts the current response speed according to the thermal conductivity of the welding material, specifically including: For materials with high thermal conductivity, the current response speed is increased by 20%; For low thermal conductivity materials, the pulse width is increased and the response speed is decreased.

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