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With the growing demand for micro devices, conventional microfabrication techniques the LIGA (German Lithograpie, GalvanoformungAbformtmg), lithography, etching, has been unable to meet the production requirements of high-volume three-dimensional complex micro devices. Plastic processing with high production efficiency, low cost and accuracy, combined with micro-extrusion of plastic processing methods, such as micro-stamping Microforming technology has been widely Development. Micro-extrusion Most studies focus on the cold extrusion but slightly cold extrusion deformation resistance, charge mode uneven. The traditional warm extrusion can not only reduce the deformation resistance, they can also increase the mobility of the material, so tepid extrusion technology has better prospects for development. Traditional heating device is complex and difficult to control, will affect the quality and cost of micro-products. Laser-assisted heating good controllability, high efficiency can be achieved with selective heating, laser heating technology combined with micro-forming technology for Microforming technology development provides a new way. This paper describes the basic theory of laser heating technology and micro-temperature extrusion technology, laser heating of the finite element model, the use of numerical simulation study of laser heating temperature field, on the basis of the micro-temperature extrusion process was simulated . The main contents are as follows: 1 describes the characteristics of micro-isothermal extrusion discuss the difference of the micro-temperature extrusion and traditional warm extrusion; simulation modeling of the key issues, including the division of the grid, thermal coupling model and the friction model processing. 2 discusses the basic theory of heat transfer; experimental study of laser heating the aluminum temperature field distribution; created by means of finite element software ABAQUS finite element model of laser heating, laser power, spot size and the heating time and other parameters of micro-devices temperature distribution were studied. Laser double-sided heating method, based on the finite element model of laser heating, laser power, spot size and heating time be combined to obtain uniform distribution of temperature field; designed laser-sided heating system, and describes the laser, laser light path and detection control device. Established a finite element model of the micro-temperature extrusion, based on laser-sided heating uniform distribution of temperature field, orthogonal experiment method, the die into the mold cone angle, the length of the work zone and fillet radius of three The structural parameters were optimized to obtain the optimal structure of the micro-temperature extrusion parameters.
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