機(jī)械外文翻譯---材料制備機(jī)械設(shè)計(jì)理論中的新趨勢(shì)和新問題-機(jī)械設(shè)計(jì)-在線瀏覽
2025-03-24 06:14本頁面
【正文】 with multi driving system ,etc. [4 ] ,are ensured. (3) To have the ability to accurately control the material processing in order to obtain low loss ,high efficiency and high quality of material processing. For example , super high accuracy on line monitor of products form ,on – line monitor and on line adjustment of products texture and properties ,precision coordination control of multi procedure , on line monitor of micro orientation of metal plastic deformation ,etc. [4 ] ,are ensured. Some products accuracy index may be enumerated as follows : dimensional accuracy ing to m , microstructure uniformity to crystal lattice ,strength error to MPa ,etc. [4 ] In short ,only by new concept material processing machine with extraordinary function being designed and made , can special function material be processed. 4 3 Science Problems and Study Contents of Metal Material Processing Machine Under the Circumstance of Extraordinary Physical Field In view of these facts and background mentioned above ,several new research topics can be advanced as follows. 3. 1 Coupling Heat Transfer Mechanism of Multi Phase Interface Temperature Stress Field A brand new microstructure can be obtained through continuously large deformation and fast solidifying when melting metal is in critical state of liquid solid. At this very moment ,high density heat flow and dynamic heat resistance are present in material processing circumstance . A basic theory problem of designing this kind of machine is to study mechanism of heat transmittance and energy conversion ,and to establish mathematical model . 3. 2 Friction Constraint Mechanism of Plastic Flow Interface of Material Processing Machine The coupling between operation mechanism and workpiece is very plicated because plastic flow is present in processing interface. The interface state , determined by velocity , load thermodynamic process , elasticity of operation mechanism ,plasticity of workpiece ,dynamic behaviour of interface sticking sliding and partial hydrodynamic lubrication ,etc ,affect and form friction constraints mechanism peculiar to material processing machine ,because these constraints present strong non linearity 。thereby ,to keep under accurate control and adjustment of multi field circumstance ,multi dimension coordination ,multi energy conversion , multi level information transfer ,interface multi process coupling ,etc. is of much significance. Since a variety of multi interaction exists in control model ,it is necessary to establish integration framework of coordination work according to decoupling of control model ,so as to accurate control based on the multi technology integration and coalescence is realized. 3. 7 Quasi Reality Design and Concurrent Design Based on Knowledge Innovation Systems Digitalization and visualization of material processing technology will promote immediately the quality of design, operation and control . Therefore optimization of material processing technology and material processing machine by means of realization of virtual simulation of processing procedure through quasi reality design and concurrent design is one of our pressing study subjects. 3. 8 Mechanical Behavior of Special Function Materials in the Extraordinary Physical Field Many key elements and parts in material processing machine are of
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1