三维装配消隐视图
三坐标数控龙门铣床床身减重设计研究
摘要
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。
关键词：龙门铣床，铣刀架，进给运动，旋转运动
Abstract
Longmen milling machine, abbreviation of Longmen milling machine, is a milling machine with portal frame and horizontal long bed. The gantry milling machine can process the surface simultaneously with multiple milling cutters, which has high machining precision and production efficiency. It is suitable for processing large workpieces in batches and mass production. CNC milling machine in Longmen can also process space curved surface and some special parts.
The shape of the gantry milling machine is similar to that of the gantry planer. The difference is that the crossbeam and the column are not equipped with the planer cutter holder but with the spindle box, and the reciprocating motion of the longitudinal table of the gantry milling machine is not the main motion, but the feed motion, and the rotation motion of the milling cutter is the main motion.
Gantry milling machine is a widely used heavy-duty machine tool, mainly used in steel, energy, chemical industry, bridges, railways, automobiles, military, molds and machine tools industry, large metal parts of various plane milling: such as horizontal, vertical, inclined and various plane composed of the rail surface. For example, the machine tool for variant design, but also can be designed with boring function gantry boring and milling machine, with grinding head on the beam can also be grinding parts.
This machine tool has the following characteristics:
(1) The unique beam lifting system is equipped with the necessary safety interlocking device to ensure the safety, stability and repetitive positioning accuracy of the machine tool.
(2) Frequency conversion stepless speed regulation is adopted for the movement of end-milling head on the beam and the movement of side-milling head on the column, which is beneficial to selecting reasonable cutting parameters and is convenient to use.
(3) The feed of the worktable is controlled by a servo motor, and the speed range is wider to meet all the milling requirements. Moreover, a hand artery impulse generator is also installed on the button station to achieve milling accuracy of micron level.
Key words: Longmen milling machine, milling cutter frame, feed motion, rotary motion
目录
摘要1
Abstract 2
一，龙门铣床的介绍和课题背景4
二，龙门铣床的与应用4
三，本课题研究内容介绍5
3.1龙门铣床结构简介5
3.2机身重量的影响因素9
四，机身机构优化9
4.1有限元介绍10
4.2龙门铣床模型建立10
4.3有限元分析11
4.4结构优化22
4.5结果比对25
五，总结26
六，参考文献27
字数统计
有限元分析结果
三维建模装配图
三维装配4视图
说明书前三页
