Development and application of digital inverter welding machine (4)

Digital security

Conforms to European ROHS standards

RoHS is the “Regulations on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment”, also called the “Prohibition of the Use of Hazardous Materials in Electrical and Electronic Products”. This regulation is a ban on the use of six hazardous substances by the European Union (EU) for electronic products entering Europe. The European Union implemented RoHS on July 1, 2006, when electrical and electronic products using or containing heavy metals and PBDEs such as PBDE and PBB PBB will not be allowed to enter the EU market. The maximum limits for the six hazardous substances are: lead (Pb), mercury (Hg), hexavalent chromium (Cr6+), polybrominated biphenyl (PBB), and polybrominated diphenyl ether (PBDE) with a maximum allowable content of 0.1% (1000 ppm). ), cadmium (cd) is 0.01% (100ppm), this limit is the legal basis for the development of products complying with the RoHS directive. The products produced by Chengdu Weiya Weida Company fully meet the RoHS standard, also known as the “green welder”.

Digital features

flexibility

Digital control has great system flexibility. For analog systems, the configuration and gain of the system is determined by hardware parameters such as the RC network, and once determined, it is difficult to change. For digital systems, all this is just changing the software. For digital welding machines, flexibility means that the same set of hardware circuits can achieve different welding process control. Different control strategies and control parameters can be selected for different welding methods and different wire materials and diameters, so that the welding machine can be realized. At the same time of multi-functional integration, the process effect of each welding process will be greatly improved. Taking the waveform control of the CO2 welding short-circuit transition as an example, the current waveform during the short circuit determines the size of the weld spatter and the weld bead shape, and the optimal current waveform will be different for different wire diameters and welding process intervals. the difference. When using analog control, we often take the principle of taking the entire process interval to select the current waveform, which will inevitably lead to the unsatisfactory process effect of some sections. The flexibility of digital control is also reflected in the online upgrade of the control software for digital welders.

stability

The second advantage of the all-digital welder is its greater stability. In digital control, the signal processing or control algorithm is implemented by software addition/subtraction, multiplication/division, so the stability is good and the consistency of the product is well guaranteed.

Accuracy

The digital welder has higher control accuracy. The accuracy of the analog control is generally determined by the error caused by the component parameter values ​​and the error caused by the non-ideal characteristic parameters of the operational amplifier. Digital control can achieve high precision through software.

compatibility

The interface of the digital welder is well compatible. Since the digital welding machine uses a large number of digital chips such as single-chip microcomputer and DSP, the communication interface between the power supply and the wire feeder, power supply and welding torch of the PC and the digital welding machine, the digital welding machine and the robot, and the digital welding machine can be very Conveniently implemented. It is believed that with the development and popularization of modern welding production network management, digital welding machines will inevitably play an increasingly important role with their good interface compatibility.

Digital outlook

Digital inverter welding machine is an inevitable trend in the development of welding equipment in the future.

The reliability of the digital inverter welding machine is fully guaranteed in technology, and the era of large-scale promotion and application has arrived.

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