In the early design phase of direct-drive hobbing machine, to allocate the reliability index scientifically and reasonably without the related reliability data, fuzzy analytic hierarchy process (fuzzy AHP) is used to allocate the reliability index of the main system units of direct-drive hobbing machine. This method is an effect way for multi-factor decision, which can consider the influence of the factors of every hierarchy on the machine maximatily and calculate the influence weights of the factors of every hierarchy quantitatively. Research on reliability allocation of direct-drive hobbing machine illustrate that this method is suitable for reliability allocation during innovative design phase.

In recent years, more and more class-A surfaces are adopted for product processing, both in the traditional industries and new industries, which proposes high requirements for the detection technique of product. This article describes the method of size detection in detail. Combining with the principle of reverse engineering, the XJTUOM and XJTUDP systems are used for the 3D digital measurement and design of the large sculpture. The digital detection technology combined with computer aided tools will have a more widespread and profound application in reverse engineering.

The rapid detection of the large complex surface was researched with the development of China's manufacturing industry. A industrial close-range photogrammetry new detection Method was put forward based on the analysis of three-dimensional optical measurement principle. The experiment results verify that the accuracy of the three-dimensional optical measurement system independently developed by Xi'an Jiao Tong University meets the Engineering requirements. The main characteristics of large workpiece can be clearly measured and the detection method can be easily used at the production site.

This article describes the mechanical structure design method of the stacking-destacking robot and puts forward part kinematics analysis. In accordance with the actual technology requirement of modern brick kiln companies in logistics automation industry, a universal stacking-destacking robot is designed based on the functional requirement. And depending on the actual production requirements of the robot, it is designed to a kind of five-dof cylindrical coordinate one. This thesis focuses on the design and analysis of the mechanical structure of the robot. And according to the production requirements, some important components are selected. Finally, the kinematics analysis of the robot was brought forward and they are verified by experiments. The results show that this robot we designed can completely satisfy the technical requirements of the work in brick kilns destacking.