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[摘要]：在科学技术飞速发展的今天，对汽车覆盖件的刚度要求越来越高，刚度成为衡量汽车质量的重要指标。如今的生产效率要求我们对刚度的测量要广泛应用于实际的生产现场。因此，研制出一种能实现对汽车覆盖件等薄板类零件进行现场刚度测试的仪器有很重要的意义。37442
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本文在已拥有一套精密检测控制系统的基础上，主要工作是对刚度测试仪进行了机械结构设计。与传统的刚度测试仪相比，本设计在摆脱了传统仪器笨重感的同时做到了保持其测量精度高与测量范围广等优点。该仪器由两部分组成：机架部分（主要包括横梁的立柱）和加载部分（主要包括加载箱体和摆动箱体）。立柱通过电磁铁通电后吸附在工作台上，横梁可沿立柱通过滚珠丝杠上下移动。加载部分亦通过滚珠丝杠沿横梁左右来回移动。摆动箱体中利用蜗杆传动来实现加载箱体的摆动。加载箱体中由步进电机通过齿轮传动带动滚珠丝杠以及光杆来实现力的加载。
本设计有如下几个优点：(1)在对各种带凹凸面的薄板类零件做刚度测试时，可以针对任一点调整测头方向，从而完成对被测点施加法向载荷，以此准确获得该零件的刚度;(2)仪器采用组合式结构，重量轻，便于测试仪的携带、运输及现场安装，同时保持了测量精度高的特点。
[毕业论文关键词]：刚度测试；刚度测试仪；薄板类零件
The New Mechanical Structural Design Of Stiffness Testing Instrument for Sheet Metal
[Abstract]：In the rapid development of science and technology today, the car covered stiffness requirements more and more high, the stiffness becomes an important index to measure the quality of automobile. Today's production efficiency requires that we measure the rigidity widely used in the actual production site.Therefore, the development of a kind of automobile covering parts of sheet metal parts can be realized for on-site stiffness testing instrument has very important significance.
In this paper, has a set of precision measurement and control system based on, the main work is the mechanical structure design of stiffness tester. Compared with the conventional stiffness tester, the design after getting rid of the traditional instrument of heavy flu and managed to stay and the measurement accuracy is high and wide measurement range and other advantages. The instrument consists of two parts: chassis parts (mainly comprises a beam column) and loading part, mainly including the loading box and a swing box. After the column is passed through the electromagnetic iron, the beam can be adsorbed on the workbench, and the cross member can move along the column through the ball screw.. The load section is also moved along the cross member by the ball screw.. The swing box is used to realize the swing of the loaded box.. The load of the box is driven by the stepping motor through the gear drive and the ball screw and the rod to achieve the load.
This design has the following advantages: (1) with a convex surface on a variety of sheet-type parts do rigidity test, for any point you can adjust the direction of the probe, thus completing the normal load is applied to the measured point, as accurate get the stiffness of the part; (2) the instrument uses modular structure, light weight, easy to carry tester, transport and on-site installation, while maintaining high measurement accuracy.
[Keywords]:stiffness testing; stiffness tester; thin plate parts
目录
摘要 I
Abstract. II
第1章 绪论 1
1.1 课题背景 1
1.2 刚度的相关知识 1
1.2.1 刚度的概念 1
1.2.2 刚度的表示方式 1
1.2.3 影响刚度的因素 3
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