发动机凸轮轴轴承档测量仪的改进设计.docVIP

发动机凸轮轴轴承档测量仪的改进设计 Design improvement of engine camshaft bearing measurement instrument 作 者 姓 名： 专 业 ： 机械电子工程 学 号 ： 指 导 教 师： 完 成 日 期： 2010.5.23 上海电机学院继续教育学院摘 要 在现代社会，汽车是人们生活出行的最普通而快捷的交通工具，而发动机是汽车的心脏，其性能对汽车的整车性能有决定性的影响。凸轮轴是活塞发动机里的一个必不可少的部件，其产品质量对发动机的性能特别是发动机功率、凸轮挺杆摩擦副的寿命、配气机构的工作状态都有很大的影响，解决凸轮轴检测问题，稳定和提高凸轮轴生产质量，一直是汽车生产企业关注的重点之一。 因此，根据对本公司凸轮轴轴承档现有量仪及测量手段的分析，在原有量仪的基础上改进了一些设计，增加了气缸、导向板、带转销等部件，具体测量步骤为将凸轮轴人工放到工件安放托架上，由气缸带动凸轮轴自动下降到测量位，两顶尖自动定位，电机带动凸轮轴旋转测量，测量结束后，凸轮轴自动升起，测量部分为全封闭结构，整体测量凸轮轴轴承档的外圆直径、轴承档跳动、圆柱度、平行度，在生产线上使测量过程更自动化，可以缩短测量节拍时间，降低操作者的劳动强度，具有一定的实用价值。 关键词：凸轮轴；轴承档；测量仪;气缸 Design improvement of engine camshaft bearing measurement instrument Abstract In Modern society car is the most common and fast means of transport. As the heart of car engine ‘s capability has decisive impact on the performance of the car. Camshaft is an essential component of piston engine. Its quality has a significant impact on the performance of engine , especially the performance of power output ,the friction life of the cam tappet and the work state of valve. It has been the focus of auto industry to improve the inspection of camshaft , stability and improvement of its quality. Therefore, based on the analysis of equipments and measurements of camshaft bearing improved design on the basis of original type was adopted. Cylinder, guide plates and rotatable pin were introduced. The specific measurement procedures are as follows: a. Place the camshaft onto the bracket manually b. Camshaft was driven to measurement position by cylinder c. Electric motor rotates the camshaft to begin measurement after camshaft’s position is decided by 2 tips. d. Camshaft will be raised automatically after measurement . The measurement process is a closed loop. It will measure the outside diameter , run out , cylindricality , parallelism , of camshaft bearing. It has practical value since it can reduce measurement cycle time and operator’