Control method and control system for welding melting amount of spark plug side electrode

Abstract

The invention belongs to the technical field of welding for electrodes at spark plug sides, and discloses a control method for the welding melting amount of an electrode at a spark plug side, and a control system for realizing the method. The pressure threshold values or values of a pre-welding pressure, a welding pressure and a post-welding pressure are set in a signal control device, through thereal-time acquisition and feedback of a pressure induction device for pressures in a welding process, a signal control device carries out real-time comparison and calculation on the received pressuresignals, and flexibly controls the welding pressures in a pre-welding phase, a welding phase and a post-welding phase, and the welding melting amount of the electrode at the spark plug side is judgedby the welding pressures; and meanwhile, through arrangement for a displacement measurement device and a side electrode post-welding length measurement device, and the respective signal connection for the displacement measurement device and the side electrode post-welding length measurement device with the signal control device, a semi-closed-loop structure carrying out effective monitoring on the welding melting amount is formed as a whole. Therefore, on one hand, the outflow of defective products can be prevented, and on the other hand, a correction prompt role and guidance on equipment orparameters can be realized, product quality can be monitored in real time, and meanwhile, the production efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of spark plug side electrode welding, in particular to a method for controlling the welding melting amount of a spark plug side electrode and a control system thereof. Background technique [0002] In the prior art, when the spark plug side electrode is welded, the butt welding pressure is mainly controlled by means of mechanical spring, air pressure and oil pressure. The common characteristics of these control methods are: the pressure before and after welding is continuously at or near a constant state and does not have welding melting. Therefore, it cannot better meet the higher welding requirements of some special workpieces, and cannot effectively monitor the melting amount of the welding place. [0003] In addition, when the existing spark plug side electrode is welded, the amount of welding melting can only be controlled by the parameters and pressure of the welding controller. However, as we all know...

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Problems solved by technology

[0002] In the prior art, when the spark plug side electrode is welded, the butt welding pressure is mainly controlled by means of mechanical spring, air pressure and oil pressure. The common characteristics of these control methods are: the pressure before and after welding is continuously at or near a constant state and does not have welding melting. Therefore, it cannot better meet the higher welding requirements of some special workpieces, and cannot effectively monitor the melting amount of the welding place.

[0003] In addition, when the existing spark plug side electrode is welded, the amount of welding melting can only be controlled by the parameters and pressure of the welding controller. However, as we all know, there may be errors in the size of the welding workpiece, and the temperature and humidity of the welding environment also exist at different times. There are more or less differences, and the fluctuation of the power supply may also affect the welding process, so only the input of parameters related to the welding melting amount without effective monitoring of the output of the actual welding melting amount will largely lead to poor welding of the electrode on the spark plug side , and may even cause batch scrapping of products, increasing the quality cost of the enterprise

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