我厂采用石膏材料借助于光学望远镜制造了一套外廓尺寸为6500×2200×900毫米的大型表面标准样件,已用于生产。实践表明,它具有成本低、制造方便、精度较高等优点。现介绍如下: 一、结构石膏表面标准样件由框架(底座)、样板、调整杆、连接固定件、表面层等部分组成,见图1。 1.框架:它是用28号、16号槽钢和20毫米、25毫米厚的钢板焊接成方形底座,其两边固定样板的平面应刨平。在框架上,两端设立 I plant the use of gypsum materials with optical telescopes to create a profile size of 6500 × 2200 × 900 mm large surface standard samples, has been used in the production. Practice shows that it has the advantages of low cost, easy manufacture, high precision and so on. Now introduced as follows: First, the structure of the gypsum surface of the standard sample from the framework (base), model, adjusting rod, connecting the fixed parts, the surface layer and other parts, shown in Figure 1. 1. Frame: It is a square base welded with 28, 16 channel steel and 20 mm, 25 mm thick steel plate, the plane of the fixed model on both sides should be planed flat. On the frame, both ends set up