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Laser micro-welding technology application on mobile phone vibration motor - Shenzhen Sun Laser

Mobile phones have become a must-have for modern people. Calls, videos, mobile office, small windows are filled with our living space. We always know that mobile phones have vibration functions, but do you know how mobile phones are vibrating? In fact, the mobile phone has a small motor for vibration.

Motor, that is, electric motor and engine. The working principle is that the rotor of the starter rotates by electromagnetic induction, and the pinion on the rotor drives the flywheel of the engine to rotate. The micro-vibration motor mainly used for mobile phones belongs to the DC brush motor. The motor shaft has an eccentric wheel. When the motor rotates, the center point of the eccentric wheel is not on the center of the motor, so that the motor is in a state of constant loss of balance. Vibration is caused by inertia.

With the development of technology, LRA linear motors appear in people's sights. This type of motor is completely different in construction from the ERM motor. As the name implies, it achieves a linear motion vibration. The so-called linear motor is developed by cutting the motor in the axial direction and expanding, making the rotary motion of the motor into a linear motion, so it is called a linear motor. The linear vibration motor is a device of system interrupt notification, enhanced sound reminder, giving users a rich sensory experience. Impressively, by providing scene vibration feedback, linear motors can provide a meticulous and subtle experience through clicks or heartbeats.

So how does such a powerful motor connect to other parts inside the phone? Yes, the motor is welded together with other parts by laser micro-welding.

Laser micro-welding is a new type of welding method, it can produce welded joints exceeding the strength of base materials. Laser welding equipment is basically free of consumables, significantly reducing downtime auxiliary time with high production efficiency. And because its focusing spot is small, the welding seam can be positioned with high precision, and the beam can be easily transmitted and controlled, so that it can weld some inaccessible parts over long distance and micro parts.

Shenzhen Sun Laser's nanosecond pulse Laser welding machine is mainly used for welding thin-walled materials and precision parts. It can realize spot welding, butt welding, stitch welding, sealing welding, etc., without flux or solder, directly welding two metal workpieces. The parts welded may be the same metal or different metals, the weld seam is smooth and flat, and the laser welding method does not cause deformation of the product periphery.

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