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[摘要]：在当今的汽车制造业中，对汽车覆盖件的刚度要求越来越高。可以说，在一定程度上，汽车覆盖件的刚度性能已经成为了衡量汽车优劣的重要指标。汽车覆盖件的刚度指标是汽车产业极其重要的竞争力。研究一种能够适应汽车制造业中大批量生产的刚度测量仪器，显得尤为重要。37444
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本文在给定的先进的刚度测量控制系统的基础上，结合龙门式结构制作方便，承受负载大，结构稳定，操作范围广，测量精度高等优点，开发出龙门式薄板类刚度测试仪。该仪器由龙门架（包括横梁和两个立柱）和测量装置组成。测量过程通过摆动箱体和加载箱体实现。通过滚珠丝杠传动，测量装置可以在水平方向移动，还可以在横梁的带动下，在竖直方向移动。加载箱体通过齿轮传动、滚珠丝杠传动，将电动机的加载力施加到汽车覆盖件上，并实现一定的变形位移量。摆动箱体通过齿轮传动从而带动加载箱体左右摆动一定的角度，实现曲面不同点不同法向的测量。
这种设计的优点是：使用龙门结构，结构稳定，精度高，测量范围大。在大批量检测中，无需重复调试，测量效率高。测量装置可以上下左右移动，亦可左右摆动，无需移动覆盖件，也可对曲面不同点进行法向测量。
[毕业论文关键词]：刚度、龙门架、加载力、位移
The Mechanical Structural Design of Gantry Stiffness Testing Instrument for Sheet Metal
[Abstract]:In modern automobile industry ,the stiffness of automotive cover panel is being requested more and more strictly.General speaking,stiffness has been a very important standard to evaluate a car, to a certain degree.The stiffness of automotive cover panel is vital competitiveness of automobile industry.It is particularly important to design a king of stiffness testing instrument to adapt to the volume-produce of automobile industry.
In this article,gantry stiffness testing instrument for sheet metal is developed on the basis of the known progressive control system,which has been combined with strengths of the portal frame,such as easy manufacturing,good standing ability,stable structure,large coverage,and high precision.The instrument consists of portal frame(which is consisted of a beam and two uprights).The measuring process is realized by a loading case and a tilting box.Testing instrument can move in the horizontal direction by the transmission of ball screw.At the same time,it can be shifted by the beam in the vertical direction.The displacement of the automotive cover panel occurs,while the motor in the loading case loads force on it through gear transmission and ball screw transmission.
The main advantages of the design are summarized as follows: using portal frame,stable structure,high precision and large coverage.Not needing debugging repeatedly,there is high efficiency in the mass detection .We can test any point on the hook face by shifting the testing instrument in the horizontal direction or in the vertical direction instead of moving the automotive cover panel.
[Key Words]: stiffness,portal frame,loaded-force,displacement
目录
摘要 I
Abstract II
前 言 1
第一章 总体设计方案 2
1.1任务分析 2
1.1.1刚度的定义 2
1.1.2刚度的测量原理 2
1.1.3任务要求 2
1.2设计方案 3
1.2.1 加载力传感器的选用 3
1.2.2位移传感器的选用 4
1.2.3 加载箱体与摆动箱体 4
第二章 加载箱体的结构设计 6
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