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Ding S.,Jinan Foundry and Metalforming Machinery Research Institute Co. | Shi X.,Jinan Foundry and Metalforming Machinery Research Institute Co. | Zhu L.,Jinan Foundry and Metalforming Machinery Research Institute Co. | Sun Y.,Jinan Foundry and Metalforming Machinery Research Institute Co. | And 2 more authors.
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2015

Research and development of sand mould low pressure casting equipment and technology for two kinds of aluminum alloy components were introduced such as large thin-walled pressure-resistant aluminum alloy housing and subjected components for automobile. It is pointed out that the green, environmental-friendly and sustainable idea can promote the rise of new casting technology, and development of sand mould low pressure casting equipment and technology are driven obviously by the large direction of thin-walled pressure-resistant aluminum alloy housing and wide application of high strength aluminum alloy parts for automobile. ©, 2015, Journal Office of Special Casting and Nonferrous Alloys. All right reserved. Source

Zhao X.M.,Jiamusi University | Zhou H.T.,Jiamusi University | Rong S.F.,Jiamusi University | Yang B.G.,Jinan Foundry and Metalforming Machinery Research Institute Co. | Li C.H.,Jiamusi University
Applied Mechanics and Materials | Year: 2014

To solve the problems of installed trival, resource waste, hammerhead falling off and improve the poor abrasion resistance of hammer handle under the crusher hammers' working condition, the new combined type crusher hammers were designed by connecting separated hammer handle and separated hammer head. When hammer head were worn badly, we just replaced hammer head and don't have to remove the shaft rod. This design can save a lot of time and labor force, improve production efficiency and we can save a lot of resources by reusing the hammer handle; At the same time, hammer tip was casted with liquid-liquid bimetal composite casting technology of casting, under the premise of guaranteeing the wear-resisting, which can also ensure that the impact toughness of the joint. Validated by actual working condition, hammer handle can be replaced at least five times for this design of hammer, and each group has 24 hammer heads, every 5 sets of hammer heads can save 1200 kg metallic materials, 1800 KWh and CO2 emissions dropped by 1795 kg. © (2014) Trans Tech Publications, Switzerland. Source

Li Y.,Nanjing University of Aeronautics and Astronautics | Zhou L.,Jinan Foundry and Metalforming Machinery Research Institute Co.
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2012

According to the characteristics of pure EV power system, an optimization design method of brake force control algorithm of electro-hydraulic composite brake system with multi-boundary conditions was proposed. And based on the analysis of boundary conditions, including the braking strength requirements, ECE regulations, and motor/battery characteristics etc, a reasonable range of brake force distribution ratio was achieved. And braking force distribution approach between the front and rear axles was brought out by considering such factors as the braking strength of demand and using frequency of the various adhesion coefficient roads. And the simulation analysis verifies the rationality and effectiveness of the brake force distribution algorithm. Source

Xu R.,Shandong University | Zheng H.,Shandong University | Guo F.,Shandong University | Zhang Y.,Shandong University | And 2 more authors.
Transactions of the Indian Institute of Metals | Year: 2014

Dendrite coherency is important to the formation of the solidification structure. The coherency point is a temperature at which the microstructure starts to bridge and develop some mechanical resistance. It is still too early in the solidification process for hot tearing to develop. Dendrite coherency point (DCP) characteristics in Al-Si binary alloys have been studied by double thermocouples method during solidification process. The results indicate that the DCP and solid fraction at DCP are decreased with an increase in silicon concentration. As for the unrefined Al-xSi (x = 1, 3, 5, 7 and 9 wt%) system alloys, the solid fraction at DCP varies from 0.14 to 0.38 and the corresponding dendrite coherency temperature varies from 598.6 to 653.8 C. In addition, there is an approximate nonlinear relationship between DCP and silicon concentration. For the binary Al-Si hypoeutectic alloys, the change of DCP is not obvious by the grain refinement and modification treatment for the melt. © 2013 Indian Institute of Metals. Source

Xu R.-F.,Shandong University | Zheng H.-L.,Shandong University | Guo F.-X.,Shandong University | Ding S.-P.,Jinan Foundry and Metalforming Machinery Research Institute Co. | Tian X.-L.,Shandong University
Research Journal of Applied Sciences, Engineering and Technology | Year: 2013

The objective of this study is to introduce a simple experimental apparatus based on the applied forces for quantitative assessment on hot tearing behavior in aluminum alloys. According to the experimental procedure, molten metal is cast in the rod-shaped mold cavity. One side of the casting specimen is hooked by a steel bolt which restrains its free contraction and transfers the tensile forces during solidification. A steel threaded rod connected to a load cell which records the real-time measurement of the tensile forces during every experiment. Thermal history is monitored by K-type thermocouple. The data of the temperature and tensile forces are acquired by a data acquisition system. Test of the experimental apparatus is conducted with A356 and Al-5 wt% Cu alloy to investigate the accuracy of the experimental apparatus and modify its operating parameter. The tensile forces curves and the temperature curves of the specimens are obtained by experiment. This data provide useful information about hot tearing formation and solidification characteristics, from which their quantitative relations are derived. In this manner, the hot tearing behavior in aluminum alloys can be studied by this experimental apparatus based on the applied forces. © Maxwell Scientific Organization, 2013. Source

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