機械外文翻譯---材料制備機械設(shè)計理論中的新趨勢和新問題-機械設(shè)計-展示頁
2025-01-31 06:14本頁面
【正文】 n material processing technology and machine are proposed ,such as ,producing new concept materials possessing some specific and extraovdinary properties by means of integrating and coalescing conelative frontier science and technology 。 extraordinary physical field。 function material 2 1 The Time Background of Material Processing Machine In the long span of history of human progress ,many tools ,machines and methods were created and a variety of materials with different properties were processed. Materials and its processing have bee one of pillar and driving force of mankind progress. In pace with multi polar petition in current world and people’s striving perseveringly for happier life ,material function goes beyond unceasingly men’s knowledge and imagination ,for example ,cryptic function material ,semiconductor material ,energy material ,vibration absorptive material , super strength aluminum alloy accounting for 70 percent of application of aeronautics and space ,metal foil of 4～ 5μm ,deep drawing plate with anisotropy below 1 percent ,electronic aluminum foil with micro orientation up to 95 percent ,heat resisting aluminum alloy with super strong specific strength used in aeronautics ,space and deep sea ,etc. Thus several important development trends with distinct time features in material processing domain are shaped up as follows : (1) Creating material processing machine with extraordinary physical field for processing material with special texture structures and functions. For example ,applications of thermal energy and mechanical energy are breaking through unceasingly technology limit ,and some non tradition energy ,such as microwave ,chemical energy , bioenergy , etc. , are introduced into material processing procedure one after another ,so that some material processing machines with extraordinary energy circumstance are produced. (2) Breaking through traditional physical limits and integrating melting ,solidifying ,plastic deformation and heat treatment to obtain special function of material and cut down expenses[3 ] . For example ,near shaping material processing technology , such as fast rolling , spraying deposition ,over plastic molding , injection molding , high energy beam ,etc ,is applied. (3) Material processing process is fed ahead in the direction of high speed ,heavy duty and high accuracy online control ,for instance , the rolling speed goes up to 130 m s 1 , line wave and pulse plex exerted in solidifying deforming area , super strength contact stress field of material forming interface ,turbulent flow field of molten metal with very big flakiness ratio ,low frequency magic field with random frequency ,microwave field for powder metal heating ,ultrasonic field for large volume solidifying ,etc. [4 ] ,are applied. (2) To have the ability to work in critical state so that high stability and ideal performance of processing machine is ensured under the circumstance of reinforced technological condition and multi field coupling operation. For example ,chatter suppressing capability of fast ultra thin rolling under the condition of boundary lubricating state[5 ] ,the capability of self excited vibration suppressing under the condition of special friction state ,synergism stability and disturbance stability of flexible connecting parallel shaft
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