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1、英文原文New Trends and Problems in Material Processing Machine Design TheoryWANGAi-lun,DUANJi-an ,HUANGMing-hui ,ZHONGJue(College of Mechanical & Electronic Engineering ,CentralSouthUniversity ,Changsha 410083 ,HunanChina)Abstract :Basedon reviewing the historical background,prospecting for the developm
2、ent trend ,analyzing the complicacy and mechanism andsumming up some achievements and experiences in scientific research , several new problems and the possible direction of development inmaterial processing technology and machine are proposed ,such as ,producing new concept materials possessing som
3、especific and extraovdinary properties by means of integrating and coalescing conelative frontier science andtechnology ;and thereafter a brief discussion is given.Keywords:interface; extraordinary physical field; procession machine ;function material1The Time Background of Material Processing Machi
4、neIn 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 become one of pillar and driving forceof mankind progress. In pace with multi - polar competition in cu
5、rrent world and peoples striving perseveringly forhappier life ,material function goes beyond unceasingly mens knowledge and imagination ,for example ,cryptic functionmaterial ,semiconductor material ,energy material ,vibration - absorptive material , super - strength aluminum alloy accounting for 7
6、0 percent of application of aeronautics and space ,metal foil of 45m ,deep drawing plate with anisotropy below 1 percent ,electronic aluminum foil with micro - orientation up to 95 percent ,heat resisting aluminum alloywith super strong specific strength used in aeronautics ,space and deep sea ,etc.
7、 1 ,2 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 ,applicati
8、ons of thermal energy and mechanical energy are breaking throughunceasingly technology limit ,and some non - tradition energy ,such as microwave ,chemical energy ,bioenergy ,etc. ,areintroduced into material processing procedure one after another ,so that some material processing machines with extra
9、ordinary energy circumstance are produced.(2) Breaking through traditional physical limits and integrating melting ,solidifying ,plastic deformation and heattreatment to obtain special function of material and cut down expenses3 . For example ,near - net shaping material processing technology , such
10、 as fast rolling , spraying deposition ,over - plastic molding , injection molding , high energybeam ,etc ,is applied.(3) Material processing process is forged ahead in the direction of high speed ,heavy - duty and high accuracy online control ,for instance ,the rolling speed goes up to 130 ms - 1,t
11、he deformation pressure rises up to 300 MPa ,accuracy of dimension up to 0.1m ,accuracy of shape up to 0. 1I ,strength accuracy comes up to 0.1 MPa. For these reasons ,it is necessary for material processing machine design theory to integrate and coalesce ingeniously correlative frontier science and
12、 technology to create and produce some new concept material processing machinewith following functions.2Due Functions of New Concept Material Processing Machine(1) To have the ability to produce and bear extraordinary physical field and transmit extraordinary energy flowwith the aimof providing extr
13、aordinary physical circumstances necessary for new concept material processing. For example ,high gradient temperature field with the speed of cool - down of work interface which exceeds 104106 Ks - 1, line wave and pulse complex exerted in solidifying - deforming area , super - strength contact str
14、ess field of materialforming interface ,turbulent flow field of molten metal with very big flakiness ratio ,low frequency magnetic field withrandom frequency ,microwave field for powder metal heating ,ultrasonic field for large volume solidifying ,etc. 4 ,areapplied.说(2社) 返To凭 h耽av谣e 刘th扬e 炒ab机il每it
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