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在短路过渡CO2焊接过程中,短路频率越高,过渡熔滴越小,焊缝波纹越细密,焊接过程越稳定,飞溅越小、,焊缝成形越好,所以,对表征短路过渡过程的短路过渡频率的测量是具有重要意义。而单片机具有很强的抗干扰能力和很好的温度特性,在测量精度和速度上都能满足短路频率测量的技术要求。本文对利用单片机测量CO2气体保护焊短路过渡频率作了详细介绍,阐述了短路过渡原理及单片机测量频率的定时/计数原理,并针对现有的短路过渡测量系统硬件设计编制了相应的软件,完成了CO2焊短路频率测量系统的设计工作。通过实际的软硬件的调试,实现了对CO2焊短路频率的测量,并能够分辨出正常短路与瞬时短路。
In the short-circuit CO2 welding process, the higher the short-circuit frequency, the smaller the transitional droplet, the finer the weld ripple, the more stable the welding process, the smaller the spatter and the better the weld formation. Therefore, for the short circuit characterizing the short circuit transition The measurement of transition frequency is of great importance. The microcontroller has a strong anti-interference ability and good temperature characteristics, both in measurement accuracy and speed to meet the technical requirements of short-circuit frequency measurement. In this paper, the use of single-chip measurement of CO2 gas shielded welding transient frequency was introduced in detail, the principle of short-circuit transition and the measurement of single-chip microcomputer timing / counting principle, and for the existing short-circuit transition measurement system hardware design and preparation of the corresponding software to complete The CO2 welding short-circuit frequency measurement system design. Through the actual hardware and software debugging, to achieve the CO2 welding short circuit frequency measurement, and can distinguish between normal short circuit and instantaneous short circuit.