METHOD AND EVALUATION OF RESISTANCE OF STATE non-consumable electrode and device for its realization in the automatic submerged arc welding consumable electrode

摘要

1. A method of evaluating resistance state and non-consumable electrode in automatic arc welding by which the welding process is measured the value of one or more parameters which indicate the wear infusible electrode compares the received measurement values ​​of this or these parameters with their pre-programmed values ​​and in case of exceeding values ​​obtained by measurements carried out above the programmed replacement consumable electrode, characterized in that during welding MY lnyayut frequency selection signals arc voltage perturbations which are proportional to the difference current of the arc voltage and its voltage set point for the selected mode of welding and contain information about the quality of the weld formation, periodically, e.g., with a frequency of 0.8-1.2 Hz, disable the automatic and arc voltage control during the pulse time interval, e.g., with a duration of 0.10-0.15, the difference value is compared current values ​​of arc voltage and voltage setpoint to its pre sETTING detecting (programmed) values ​​of the reference voltage level of which corresponds to the smallest value of the perturbation of the arc voltage arising in varying degrees of erosion of the working part nonconsumable electrode, and if the level difference of the actual arc voltage and the voltage of its setpoint reaches a reference voltage level or exceeds is carried out automatically stopping the welding process and replaced with a non-consumable elektrod.2. An apparatus for the automatic arc welding with non-consumable electrode, in the