总体结构设计-机架装配
基于平动并联机构的机床的运动学分析与设计
摘要
随着信息技术的进步和全球化制造技术的进步，企业为了提高自身的竞争力，需要更高效的成本更低的加工设备，而传统的机床在未来的加工行业中将是H。克服高速加工（轨道速度可达50米/分钟）和空间曲面加工和机床通用性等困难将无法满足现代加工技术的要求。因此，探索和研究现代机床具有十分重要的意义。
虚拟轴机床比传统的系列数控机床具有许多优点。传统数控机床的各种自由度串联、悬臂结构、级联嵌套LED传动链长、传动系统复杂、累积误差大、精度低、成本昂贵，目前大多数机床为4轴联动，很少5轴。虚拟轴机床的并联加工中心结构简单，传动链短，刚度大，质量轻，切削效率高，响应快，特别是六轴联动容易实现，因此可以加工成更复杂的三轴。弯曲曲面的加工精度和粗糙度直接由控制程序保证，因此，硬件成本低，且附加值高的软件，高附加值是一种机电一体化产品。
针对目前机械加工的发展趋势，本文设计了一种并联机床试验台。并行部分分配给合作者，作者主要负责并联机床实验台的总体框架结构设计。
该平台由三个并联的并联螺杆（驱动电机）、铸铁机架、加载卡平台、电主轴和弹簧铣夹头组成。
关键词：并联机构；虚轴加工；雅可比矩阵；正解算法
Kinematic Analysis and Design of Machine Tools Based on Parallel Translation Structure
Abstract
With the progress of the information technology and the development of the global manufacturing techniques, enterprises require more efficient and lower cost machines by reason of enhancing their competitive ability. But conventional machine toolswill encounter many difficultieswhich are hard to overcome in the future, for instance of high-speed machining( path speed exceeding 50m/min)and high efficient space curved surfacing machining aswell as flexibility of machines. Thus, it isvery important to explore and study kind of modern machines.
Be compared to the normal numerical control machine tool, it has larger rigidity, stronger carrying capacity, smaller error, higher precision, smaller ratio of self-weight and load, better dynamical capacity, less investment of hardware, but stronger function of software. All of these show its high additional technicalvalve.
This research topic for the current trend of the processing machine, developed a design of a parallel machine test-bed task,which the Author co-design and a partner. Some of them parallel to the allocation of the partner, the author mainly responsible for the PMT test-bed framework of the overall structural design.
Platform from roughly parallel bodies- three parallel screw(motor driven), cast iron rack,with card platform and Spindle and milling chucks of spring.
Keywords: parallel instruction,virtual axis processing, Jacobian Matrix, positive solution algorithm
目录
摘要I
Abstract II
1.绪论1
1.1课题背景与意义1
1.2并联机床发展历史及现状2
1.3本文主要研究内容8
2.重要零部件选型10
2.1依照主轴功率确定电主轴型号10
2.2选择主轴下部刀具夹头11
2.3工件装卡夹具选用12
2.4滚珠丝杠螺母副的计算与选型16
2.4.1最大工作载荷的计算16
2.4.2最大动载荷的计算17
2.4.3规格型号的初选18
2.4.4刚度的验算18
2.4.5稳定性的校验20
2.4.6滚珠丝杠总长度的确定20
2.5滚动轴承的选用21
2.5.1基本额定载荷21
2.5.2滚动轴承的选择21
2.5.3轴承的校核22
2.5.4步进电机转轴上总转动惯量的计算23
2.5.5步进电机转轴上等效负载转矩的计算25
2.5.6步进电动机尺寸28
2.6联轴器的选用29
3.机床数学模型建立31
3.1机床空间位置理论31
3.1.1位置逆解模型32
3.1.2灵活度分析33
3.2铸造机架的材料及热处理36
3.3机架的截面形状、壁厚及周边筋的布置36
3.4立柱与底座的连接方式39
3.5底座的造型40
4.机床电路设计41
4.1电路布线方案41
4.2电路控制要求41
4.3电路控制连线原理41
5.实验结果与三维建模43
5.1设计并联机床结果43
5.2并联机床solidworks三维建模43
总结与展望46
参考文献47
附录49
致谢54
底座平台
立柱
三爪卡盘
A总体装配图
目录
设计所包含文件
摘要
字数
