Papers by Keyword: High Efficiency Grinding

Abstract: Heat pipe grinding wheel (HPGW) is a new grinding wheel which can improves heat transfer enhancement with the contact zone by means of the heat pipe technology. In this paper, the heat transfer principle and making process about heat pipe grinding wheel is illustrated. After then, grinding experiments with HPGW were carried out to verify the effect of heat transfer in the grinding titanium alloy Ti-6Al-4V. Results showed that using HPGW could significantly reduce grinding temperature and prevent the burnout in the grinding.

Abstract: In the manufacture of ceramic components, it has been well documented that the grinding costs can be as high as 80% of the total cost. To reduce the grinding cost, massive research studies have been conducted and new types of high-performance machining techniques have been developed based on the fundamental understanding of the prevailing grinding mechanisms for engineering ceramics. The developments in grinding mechanisms and grinding processes are reviewed and summarized.

Abstract: Soft magnetic powder cores are materials manufactured by pressing pure iron powder covered with insulating film into shape. These are widely known soft magnetic materials which are used as essential electromagnetic conversion parts in automobiles and household appliances. In recent years, demand for higher magnetic properties and dimensional precision has been growing with respect to soft magnetic powder cores. It has therefore become necessary to develop a high-efficiency, high-precision finishing method. The issues to be addressed with regard to this kind of method are: (1) the pure iron used in these materials displays ductility resulting in burring and cohesion to machining tools, (2) these materials are green compacts with low binding forces between powder particles and high tendencies towards cracking and gouging, and (3) these materials possess residual pores at levels of several percent thus resulting in microscopically intermittent processing which causes heavy machining tool wear. We have solved these issues through the development of a super-smooth finishing method designed for soft magnetic powder cores.

Abstract: The paper describes the heavy abrasive belt grinding technology and the conventional machining method to reduce thickness of connecting rod head, analyses the technique difficulties with the latter, brings forward a reasonable new method which can reduce thickness by heavy abrasive belt grinding, expatiates on the grinding result with the grinder which is designed by this method, finally summarizes and prospects to this new method.

Abstract: Aiming at the existent problems in the application of high efficiency grinding, some countermeasures are put forward to further exploit its potential, including the topography optimization design for high efficiency grinding wheel and cooling enhancement technology with jet impingement in grinding zone. The optimization model advanced here can be used to optimize the grinding wheel topography for different grinding processes with the minimum specific grinding energy. The cooling enhancement technology employed in creep feed deep grinding experiment of titanium alloy shows remarkable cooling capability. It is able to steadily control the temperature on workpiece surface at an extremely low lever under 100°C,when the workpiece is seriously burn with the conventional coolant supply. Further studies on the combination of these two countermeasures will not only enable us to increase the available material removal rate to a new lever but also solve the workpiece burn problem for those difficult-to-machining materials in high efficiency grinding.