The quality of the outer drum of the washing machine determines the noise and lifespan of the entire machine during high-speed spin-drying. The seemingly simple "circular drum" imposes dual requirements of roundness and dynamic balance on the forming equipment.
Common customer questions:
After the outer drum is formed, the roundness error is too large, causing vibration when the drum rotates;
The force distribution at the circumferential welding points is uneven, leading to metal fatigue during long-term use;
The thickness distribution of the drum body is uneven, resulting in eccentricity and disrupting dynamic balance.
Technical points of the equipment:
The forming machine must have real-time detection of concentricity to ensure uniform force on each circle;
When designing the bending passes, adopt a symmetrical distribution to reduce stress deviations;
Key parts can be combined with a CNC centering device for secondary correction during discharge.
These processes directly affect whether the washing machine can operate stably at a rotational speed of 1200 revolutions per minute. This is precisely the root cause of the most common noise problem reported by customers.