There are many kinds of desk and chair sets on the market, the price difference is large, and the quality is also uneven. If you choose cheap ones, the quality cannot be guaranteed. There are many factors that affect the quality. If you want to buy good quality products , we must first understand the factors that affect the quality of desk and chair sets.
Process factors affecting the quality of desk and chair sets
1. Welding wheel diameter
The diameter of the welding wheel determines the diameter of the nugget. As the new welding wheel is ground again and again, the diameter gradually becomes smaller, the contact area between the desk and chair and the steel strip is reduced, the current density is increased, and the pressure on the welding point is increased. Also added, so the diameter of the welding wheel cannot be too small.
2. Welding current
The influence of the welding current of desks and chairs on the heat is a quadratic relationship. As an adjustable parameter, it can be selected according to the thickness of the welded steel strip. The factors that affect the actual current change are the fluctuation of the power supply voltage and the resistance of the secondary circuit. In order to ensure that desks and chairs are not affected by external conditions, it is necessary to adopt a constant current control system.
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