选择性激光烧结成型技术(Selective Laser Sintering)是国内外应用最广泛的成型技术之一，其广泛应用于模具制造、航空航天、工艺品制作等领域。双光源选择性激光烧结技术可一次快速成型大尺寸制件，具有低成本、高效率等优势，但由于成型面积的增加，对预热及后固化工艺提出了更高的要求。因此，本文针对预热系统中预热均匀性、预热工艺、微波后固化工艺等问题进行了深入系统的理论分析和实验研究，其具有重要的实际意义和应用价值。 分析了加热管与受热面之间的热辐射传递规律，推导出两者之间热量传递的公式，并确定影响温度场均匀性分布的主要因素，在此基础上提出了使用不等高预热装置改善预热均匀性，通过ANSYS有限元软件分析了各加热管组在不同高度、不同辐射力时的受热面温度场的分布规律，获得了最佳温度场分布时各个加热管的具体高度，并在实验平台中进行了验证。通过飞升曲线法确定预热系统最佳温控PID参数，并对预热系统中的红外温度传感器进行校对标定，根据实际工况设计了不间断测温方法。 分析了在实际加工过程中成型所需能量的给予方式，获得了烧结层剩余热能积累规律，通过实验，分析烧结层温度曲线、烧结实验件精度变化曲线及强度变化曲线，总结了一种逐步降温的制作工艺，即针对成型中能量的过剩，有步骤的降低预热温度，使加工面获得的能量基本一致，并通过实验验证，这种预热工艺可有效提高制件尺寸精度。 研究了一种微波后固化工艺方法，因为微波的独特热物理性，避免了热量在传递过程中的损失，能量利用率高、加热时间短。通过实验，确定了微波功率与制件温度及所需时间三者之间的关系，证实微波后固化的制件在强度、收缩率等方面均优于传统后固化工艺，拟定了初步微波后固化工艺流程。

At home and abroad, Selective Laser Sintering is the most widely used rapid prototyping technology, which are widely used in mold manufacturing, aerospace, crafts and other fields. The double light source selective laser sintering can one-off rapidly produce the large size of the parts, has the advantages of low cost, high efficiency, however, due to the increase in the molding area, put forward higher requirements for preheating and post-curing. Therefore, this paper conducted in-depth research such as temperature uniformity, preheating process, microwave post-curing, which is full of important practical significance and application value. This paper analyzes the law of thermal radiation transfer between the heating tube and heating surface. This paper deduces the formula of thermal energy transfer between them and the main factors that determine the impact of the distribution of temperature field uniformity. On this basis, put forward a method of unequal altitude preheating equipment to improve the preheating uniformity, and using the finite element method to analyze the influence on preheating temperature field when the heating tube at different heights and power, optimum distribution of preheating temperature field are obtained with this method, and verified in the experiment. By transition curve Act to determine the preheating system thermostat PID parameters, and the infrared temperature sensor in the preheating system for proofreading. According to the actual industrial design uninterrupted temperature measurement methods. Analysis of how to get energy in the actual process and accumulation of the excess heat of the sintered layer, Through the sintered layer temperature curve, experimental accuracy change curve and the strength curve is recorded and analyzed in the experiment, presented a gradual cooling of the production process, because the excess energy in the manufacturing, so there should be steps to reduce preheating temperature, so that the machined surface energy is consistent, verified by experiment, indicating that this preheating process can effectively improve the accuracy and strength of parts. This paper presents a microwave post-curing method, because microwave thermal physics, to avoid heat loss in the transmission process, high energy efficiency, heating time is short. Through experiments to determine the relationship between the microwave power, temperature and time in the microwave heating, prove the microwave curing parts in terms of strength, shrinkage superior to the traditional curing process and to develop the initial microwave post-curing.