The clinching process of magnesium alloys has a great potential of being high efficient joining method, but it is restricted by the limited formability of magnesium alloys at room temperature. To form acceptable joints without cracking, it is usually required to heat the parts to about 220°C. However, the pre-heating times of traditional forming method is more than 3 to 6 seconds, the application of clinching for magnesium alloys is restricted by the over long periods of heating time. A new joining process with a contoured die is introduced to offer great benefits, especially in pre-heating time. Then the heat transfer process is simulated with DEFORM-3D software. The results show that the pre-heating time reduced to less than 1 second. Thus it is efficient and reliable in joining of magnesium alloys parts.

The aerodynamic characteristics of vehicle play a crucial role in steering stability, comfort and safety of vehicle. The crosswind will affect the aerodynamic characteristics of vehicle. In this paper, the aerodynamic characteristics of ASMO model under steady crosswind is simulated by XFlow software, and the changes of aerodynamic characteristics under different steady crosswind are analyzed. It turned out that the asymmetry of wake flow field is enhanced with the increasing of crosswind, and the body surface pressure of windward is amplified, the six components of aerodynamic coefficient are also increased. It is found that the vehicle aerodynamic characteristics changed obviously under steady crosswind.

Joining by forming of magnesium alloy is a kind of high-efficient joining method, but it’s restricted because of the limited formability of magnesium alloy at room temperature. According to the present status of joining by forming of magnesium alloy, the relative proposing solutions by using the contradiction matrix of TRIZ are given. The practice shows that dieless clinching solution is effective, and then the improvement program which also can decrease the pre-heating time considerably is presented. After analyzing, the result shows that the program is feasible.

The seaport cluster is an important method to make full use of finite resources. According to SWOT analysis, the article proposed that the strengths of Qingdao ports focus on management, brand and information technology. Its weaknesses concentrate on the Inter-port contradiction, collecting and distributing system, and the international trans-shipment operations. The opportunities are the policies attention and the development of hinterland economy. However, the threats mainly come from Inter-port competition outside the Shandong Peninsula region. Through the analysis, Qingdao ports faced with far greater opportunities than threats. Therefore, in order to reduce the Inter-port competition and upgrade the whole competitive ability of Qingdao Peninsula ports, the implement of seaport clusters within Qingdao ports is imperative.

The traditional processes of elbows have some shortcomings such as the thickness of the convex side of elbows is less than that of the concave side of elbows. In order to overcome these shortcomings, the process of hot push bending elbows is introduced in this paper. By this process, the even thickness and strength elbows can be produced for modern industrial demands. Four fundamental hypotheses describing the forming characteristic of the elbows are put forward based on the experiment results in elbows forming process. Then, the relation among instantaneous curvature, diameter and thickness of the elbow is investigated, which is the key problem for manufacturing die. Finally, the process parameters CAD system of heated pushing elbows is developed. This CAD system has brought great economic and social benefit in industrial applications.