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毕业设计-龙门铣床有限元分析，共36页， 9189字，附有solidworks三维设计图纸。
引言
龙门铣床简称龙门铣，是具有门式框架和卧式长床身的铣床。龙门铣床上可以用多把铣刀同时加工表面，加工精度和生产效率都比较高，适用于在成批和大量生产中加工大型工件的平面和斜面。数控龙门铣床还可加工空间曲面和一些特型零件。
龙门铣床的外形与龙门刨床相似，区别在于它的横梁和立柱上装的不是刨刀刀架而是带有主轴箱的铣刀架，并且龙门铣床的纵向工作台的往复运动不是主运动，而是进给运动，而铣刀的旋转运动是主运动。
龙门铣床是用途广泛的重型机床，主要用于钢铁、能源、化工、桥梁、铁路、汽车、军工、模具及机床行业的大型金属零件的各种平面铣削：如水平面、垂直面、斜面及各种平面组成的导轨面。如对机床进行变型设计，还可以设计成带镗削功能的龙门镗铣床，在横梁上配上磨头还可以进行零件的磨削加工。
本机床具有如下特点：
①、独特的横梁升降系统设有必要的安全连锁装置，以保证机床的运行安全，稳定性以及重复定位精度。
②、立铣头在横梁上的移动、侧铣头在立柱上上下移动均采用变频无级调速，有利于选取合理的切削参数，使用较方便。
③、工作台工作进给由伺服电机控制，调速范围更宽可以满足所有的铣削要求，并且按钮站上还设有手动脉冲发生器可以精度对刀实现微米级的铣削精度。
Abstract
Longmen milling machine referred to Longmen milling, milling machine with portal frame and the horizontal length of the bed. Longmen milling machine can simultaneously process the surface with multiple cutters, the machining precision and the production efficiency is higher, suitable for processing large workpiece in batch and mass production of the plane and inclined plane. Longmen CNC milling machine processing can also be space curved surface and some special parts.
Longmen milling machine appearance with Longmen planer is similar, the difference lies in the cutter frame which is arranged on the cross beam and the column planer tool but not with the main spindle box, and the reciprocating motion of a longitudinal worktable Longmen milling machine is not the main motion, but the feed movement, but the rotary motion is the main movement of milling cutter.
Longmen heavy duty machine tool milling machine is widely used, mainly used for various planar milling large metal parts of iron and steel, energy, chemical, bridge, railway, automobile, military industry, mold and machine tool industry: such as rail horizontal plane, inclined plane, and a variety of composition of the surface. As for the variant design of machine tool, Longmen boring and milling machine can also be designed with boring function, grinding on the beam with the grinding head can also be used for parts.
This machine has the following characteristics:
First, the unique lifting beams system is provided with a safety interlocking device necessary, to ensure the safe operation of the machine, the stability and repeatability of positioning accuracy.
II, vertical milling head on the beam, side milling head moving up and down on the column mobile adopts frequency conversion stepless speed regulation, is conducive to the cutting parameter selection is reasonable, the use is more convenient.
Third, worktable feed is controlled by a servo motor, a wide speed range and can meet the requirements of all the milling, and button station is also provided with a manual pulse generator can realize precision cutter milling micron.
目录
一，龙门铣床的介绍和课题背景
二，龙门铣床的与应用
三，本课题研究内容介绍
3.1龙门铣床结构简介
3.2机身重量的影响因素
四，机身机构优化
4.1有限元介绍
4.2龙门铣床模型建立
4.3有限元分析
4.3.1模型导入
4.3.2模型特性定义
4.3.3网格划分
4.3.4工况条件
4.3.5解析
4.4结构优化
4.4.1模型重量优化
4.4.2优化后的解析
4.5结果比对
五，总结
六，参考文献