The hub installation technology using ultrasonic welding theory and the method of seeking the centre of MO disk using pattern recognition are described in detail.

Introduces the principle and features of the ultrasonic welding of the thermoplastic staking technology in the course of gas meter diaphragm assembling.

By controling the three-dimensional motion of the X-Y table and bond head, precision positioning and desired line-type gold wires can be realized, and an ultrasonic wave bonded method is used.