Automotive seat adjustment motors drive seat forward-backward, up-down and backrest angle adjustment, requiring compact structure, good sealing and anti-vibration performance, protecting internal motors and gears from dust and debris intrusion. Traditional assembly processes have poor sealing, easy entry of dust and debris, leading to motor jamming and abnormal noise. DaokeDao laser welding provides a fully sealed connection scheme for PA and PC motor housings, forming a continuous and dense weld, with sealing performance reaching IP65 grade, effectively blocking dust and debris. The non-contact process avoids mechanical damage to internal motor components, with zero vibration impact, ensuring the smooth operation of gears and motors. The weld has high strength, resists long-term adjustment vibration without loosening, with a service life matching the vehicle. The equipment supports small and medium-sized motor housing welding, with fast cycle speed and high consistency, suitable for mass production of automotive seat suppliers, reducing product failure rates and improving user comfort.