The development and research status of multi-point forming (MPF) technology in aircraft skin manufacturing field is presented. Some key points of the research works are put forward, such as design of forming equipment, elimination of component defects and control of component forming accuracy and so on.
An approach of product configuration based on uncertain demand of customers is put forward to realize the mass customization(MC) . The demand of customers and product property values are converted to the triangular fuzzy numbers firstly in this approach, and the similarity is calculated after the normalization. And then the simple additive weighting ( SAW) method is taken as the utility function to derive the products which have the maximum similarity to the demand of customers. Finally, the digital camera is taken as an example to further verify the feasibility and the validity of this approach.
A novel self-tuning PI-type fuzzy logic controller ( FLC) is presented. The controller can realize the self-tuning of controlling parameters and simplify the design and utilization progress to guarantee the performance of fuzzy controller. The theoretical analysis and simulation results prove the performance of self-tuning FLC is better than its conventional counterpart.
According to the characters of core enterprise, some new problems and characters arise from SCM ( supply chain management) are analyzed, single layer BOM ( bills of material) memory structure is put forward. And a single layer BOM-based multi-view mapping model between core enterprises and node enterprises, and the implementation of its process are also given.
The cell integration of welding plant in automobile manufacturing enterprises is discussed. Considering the enterprise’s schedule of CIMS and characteristics of welding industry, the functions and requirements of the integral platform are put forward. The structural frame and system constitution of the welding cell integration are described in detail. The solution of the integration of heterogeneous data and heterogeneous network in the integration process is given. Some suggestions and requirements in the implementation of the cell integration in welding plant are put forward.
Under the condition of certain conventional friction welding parameters, the effects of braking time difference and upsetting rate on deformation of NiCr20TiAl/4Cr10Si2Mo friction welding interface are studied. It is found when braking time difference is 0.3s, and upsetting rate is 30mm/s, interlaced friction welding interface is formed, therefore, a new way to improve the tenacity of dissimilar high strength metal friction welding joint is found.
