Digital controlling method for communicating structure of short-circuit transient COz weld

Abstract

A numeral control method of the communication structure for the short-circuit CO2 arc welding features that a digital signal processor and a single-chip microprocessor are used for allocation of multiple control tasks in the dynamic short-circuit transfer process, and said control tasks include setting up technological parameters, setting up process parameters, controlling welding timing, displaying current parameters, acquiring the parameters of short-circuit transfer process, controlling the external characteristics of power supply and the waveform the welding current, and controlling the failure diagnosis.

Description

technical field [0001] The invention relates to a digital control method, in particular to a short-circuit transition CO 2 Digital control method of welding communication structure. For use in welding technology. Background technique [0002] CO 2 Gas shielded welding is a high-efficiency and energy-saving welding method. Most of this method uses short-circuit transition, and spatter is short-circuit transition CO 2 One of the main problems of welding, there are many researches on this aspect at home and abroad. short-circuit transition CO 2 Splash is generated instantaneously during welding, and its suppression also needs to take effect in a very short time; at the same time, CO 2 The short-circuit transition process is a dynamic and relatively stable process. For the control of such a dynamic process, its external characteristics of the power supply should also have adaptive changes. To meet the above two conditions, it is necessary to have a control system that can ...

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Problems solved by technology

For a pure hardware circuit control system, the circuit is complex, the structure is not compact, and the various parts are easy to interfere with each other, and only a simple single control of the external characteristics of the power supply can be realized, and it is difficult to achieve fast real-time adjustment of the external characteristics of the power supply; While the current CO 2 The short-circuit transition current waveform control is generally controlled by a single-chip processor or a digital signal processor of a single CPU. Although it can better control the welding process of a single task or fewer tasks, because the task execution of the CPU relies on executing instructions one by one to complete, and the execution of these instructions is carried out in time, for such as CO 2 For such a complex dynamic process as short-circuit transition, and a multi-task structure control control system with fast wave control and real-time external characteristic adjustment functions, a single CPU microcomputer control system, it is difficult to realize the juxtaposition of multi-task structures in time. At the same time, it is difficult to realize the calculation of the complex power external characteristic algorithm and the fast wave control requirements with strong real-time

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