Based on the investigation of the existing problems in ultrasonic inspection of large cylindrical parts,an online and automatic ultrasonic testing system was developed to detect the inner flaws of lager cylindrical parts.

Pressure water jet cleaning big workpiece equipment;

Introduced in detail the development of new bearing for large-scale rotary kiln.

This paper advances the calculating method and formulas of blank diameter of thin-wall round workpiece with arbitrary shape generator under conventional spinning process,which provides evidence and assistance for actual calculation in workshop.

Thin wall revolving body made by fragile material is a kind of baroque workpiece which is used in some domain such as aviation,spaceflight and radar communication,its precision influences the equipments\' performance in these fields.