Papers by Author: Jian Hui Li

Abstract: Manufacturing of vitrified bond CBN wheels for internal precision grinding of the air-conditioner compressor piston hole is still big challenge to all of the domestic manufacturers. Recently, by choosing pre-melting mixed CBN abrasives and a proper sintering process, a cost-effective method was conceived to produce grinding wheels of comparative quality. The grinding performance of wheels was evaluated with a series of internal precision grinding of compressor piston hole. Experimental results show that the vitrified bond CBN grinding wheel produced by this method has better grinding performance, and can be substitute to the same type of grinding wheels imported. But the manufacturing cost is only 60% of the wheel imported according to estimation.

Abstract: The double-vertical-column frame component, 8780mm high, is the key structure of Electrical Slag Founding Furnace (ESFF). Due to its structural complexity and crucial functional role in the entire equipment, the frame structure is actually the most sensitive part of cost-effective manufacturing. Properties design, in which both static and dynamic properties are analyzed in order to meet the functionality requirement, is widely believed as important as other production processes, such as requirement identification, conceptualization, DFM and so on. And its deterministic role in cost effective manufacturing has been discussed in many historical literatures. Finite Element Analysis (FEA), one of most powerful engineering tool, has long been employed in designing of the frame component aiming to reduce computational time and improve computational precision, either in presence of separated tool or as an integrated utility in CAD systems, for a long time. However seamless integration FEM into Computer-Aided-Design is still a challenging topic and one of the bottlenecks of cost-effective design recognized by scientists in the past. Based on a 3D solid model created with the CAD-system-compatible software SolidWorks, Finite Element Analysis (FEA) of the Furnace frame structure was carried out, which provided easily utilized data for the successive manufacturing processes as well as near-instantaneous feedbacks to designing process.