内容摘要
1.1 本设备的主要作用
金属切削机床是用切削的方法将金属毛坯加工成机器零件的机器，它是制造机器的机器。该设备即粉碎机下机体专用铣床，是一台为铣削下机体的支承面和两侧面而专门设计的龙门架构式铣床。其主要作用是进行两支承面和侧面铣削，提高两支承表面的平行度和切削速度。作为专用铣床的同时，也可以完成其他形式表面的铣削加工，具有一定的通用性。
1.2本设计的现实意义
本课题属于实际生产型的专用机床类的设计课题。题目来源于烟台市某粉碎机厂。该厂生产的农用锤片式粉碎机市场需求量大，除内销国内市场外，已外销到亚洲、非洲等第三世界国家。该厂为乡镇企业，是小型农业机械厂，设备老化，生产条件差，粉碎机机体、机盖的加工平面仍采用低效的牛头刨床进行平面刨削加工，严重影响产品质量和生产效率的进一步提高。因此,工厂迫切需要改变现有的生产条件，进行提高生产效率、改善产品质量方面的技术改造，以达到年产12000台的生产水平。下机体支承面专用铣床的设计就是工厂技术改造的重点项目之一。用“以铣代刨”的制造工艺，可明显提高粉碎机的质量和生产效率，使产品合格率上升，在市场上具有较强的竞争能力，从而增加企业的综合经济效益。所以，企业必须设计一台专用铣床来适应企业的发展。
这样，对企业的生产率、产品质量也有了更高的要求。本企业为了适应科学技术的发展，在激烈竞争中有立足之地必须改进生产技术。所以，企业需要设计一台更高效、高质量的加工本零件的机床。
1.3本设计的目的
通过毕业设计教学过程，培养学生树立正确的设计思想和拿捏现代设计方法，使同学们能够综合运用多学科的理论、知识与技能，解决具有一定复杂程度的工程实际问题，并培养学生勇于实践、勇于探索和开拓创新的精神。另外毕业设计还是衡量高等学校教育质量和办学效益的重要评价内容。
关键字：专用铣床; 粉碎机下机体 ;龙门式铣床; 支承面铣削
Abstract
1.1 equipment major role
Metal-cutting machine tools is the method of cutting metal blank increase the machine parts into the machine, which is manufactured machinery of machinery. The mill equipment that is under the body of Miller, Taiwan is one of the milling under the body of the bearing surface and the surface on both sides specially designed gantry-type milling machine structure. Its main role is to carry out two for surface and profile milling, raising two parallel for the degree of surface and cutting speed. As special milling machine, but also other forms to be completed surface milling, have some commonality.
1.2 Design of the practical significance of this issue
The actual production of an exclusive category of machine design issues. Subject from Yantai City mill plant. Agricultural production plant Hammermill market demand, in addition to the domestic market, has been exported to Asia. African and other Third World countries. The plant of township enterprises, small agricultural machinery factory, and aging equipment, poor production conditions, the mill airframes, processing machines covered plane still using inefficient Shaper Planing plane processing, serious impact on product quality and production efficiency further improved. Therefore, the factory is an urgent need to change the existing production conditions, enhancing production efficiency and improve product quality in the technology, in order to achieve an annual output of 12,000 Taiwan production levels. Body bearing surface milling machine dedicated factory design is the technological transformation of one of the key projects. "Milling-generation gear to" manufacturing technology, can significantly improve the mill''s production quality and efficiency, so that the rate of qualified products increase in the market with strong competition, thereby increasing the overall economic efficiency of enterprises. Therefore, enterprises must design a special milling machine to adapt to the development of enterprises. Thus, the productivity of enterprises and the quality of products now have higher requirements. The enterprise in order to adapt to the development of science and technology, in the fierce competition gives way to the need to improve production technology. Therefore, enterprises need to design a more efficient, and high-quality processing of the components of the machine.
1.3 The purpose of the design
Through the process of teaching graduate design, to cultivate the students with the right design and method of making modern design, enable students to the integrated use of multidisciplinary theory, knowledge and skills, and solve certain complex engineering problems, and to develop students to practice the courage to explore and develop the spirit of innovation. Another graduate design or measure the quality of higher education and management efficiency as an important evaluation.
Keywords : special milling machine ; broken body under the machine ; gantry milling machine ; bearing surface .
