PLC转向轴承轴圈沟道参数测量仪的测控系统设计
毕业论文关键词：转向轴承 参数测量 曲线拟合 PLC
Design of measurement and control system for steering bearing ring groove parameter measuring instrument
Abstract Steering bearing ring raceway parameter measuring instrument has now is the research focus at home and abroad measurement, and has made some achievements. This paper is mainly on the basis of the existing technology, re design the measurement and control system of a kind of efficient parameter measuring instrument. The measurement and control system design of shaft ring parameter measurement precision and bearing separation is of great significance. The design of the main completed steering bearing shaft ring channel parameter measuring instrument measurement and control system design, mainly for the control of the system parts, and parts of the measurement system. Part of the hardware to step into the motor and sensor selection. Software control part of the system mainly through the PLC to control the step motor rotates to drive the movement of the internal structure of a measuring instrument; measurement system by using LabVIEW programming, using the least square method of thought to the measurement of shaft ring raceway curve fitting, data processing is completed, showing and storage. In this paper, the design of steering bearing ring raceway parameter measuring instrument can realize the full automation of the process control, using PLC to realize automatic control, and high efficiency and low cost to achieve the curve fitting and parameter computation and storage. There are 23 figures, 1 table and 26 references in this paper.
Keywords: Steering bearing parameter measurement curve fitting PLC
目录
摘要.I
AbstractII
图清单.IV
表清单.V
1绪论.1
1.1概述1
1.2轴承沟道参数测量技术现状1
1.3研究意义及本文结构.5
1.4本章小结6
2系统的总体方案设计.7
2.1沟道测量仪的目的和任务7
2.2参数测量仪测量原理7
2.3机械系统方案10
2.4本章小结12
3轴圈沟道参数侧量仪的测控系统.14
3.1测控系统的硬件构成14
3.2测控系统的软件组成18
3.3参数测量仪控制系统.18
3.4参数测量仪测量系统.21
3.5本章小结28
4总结与展望.29
4.1全文总结29
4.2工作展望30
参考文献.31
致谢.32
1 绪论
1.1 概述 转向轴承作为标准件，互换性高，摩擦小、润滑简单、易于启动、易于更换，是现代机械结构中不可缺少的组成部分。轴承功能是用来确定旋转轴和其他部分的运动之间的相对位置，保持旋转轴或其他移动机构的支撑稳定，并承担载荷，转向轴承是在各种机械运动和负载中的重要支撑部件[1]。 伴随着工业的不断发展，机械结构对轴承的性能、寿命和可靠性提出了更高的要求。这就要求对轴圈参数的测量更加精确以保证轴承的检测[2]。转向轴承的性能、寿命和可靠性取决于轴承的设计、制造和检测，而检测是对于提高轴承的性能具有至关重要的作用。 本课题针对摩托车用转向轴承的轴圈沟道参数进行测量，轴圈如图1-1所示。 图1-1 轴圈图 沟道尺寸的加工精度决定了转向轴承的产品精度，直接影响其安装、运转精度，所以，实现对轴圈的参数的精确测量已成为重中之重，为轴圈的分选提供了有利的前提。本课题的目的就是旨在研究实现轴圈沟道半径、圆心，中心高、中心距的全自动测量。 1.2 轴承沟道参数测量技术现状 目前，国内生产轴圈沟道参数测量仪的并不多，其中有的厂家主要采用手动测量仪。国外对轴承轴圈沟道参数的测量方法采用了一些先进的技术，大多都实现了轴承的多功能测量，并且实现机、电、气一体化的全自动测量[3]。有的已经发展了带有计算机辅助的测控系统，达到了相当精准的水平。但是测量的成本比较昂贵，国内暂时还无法实现。