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在进行拉伸试验时,试样拉断后要测量其伸长和断面收缩后的直径。伸长和收缩的测量,一个是在纵向,另一个在横向。因此,需要把试样转过90°(或者测量人员移动位置)。加上试样已经拉断,必须先将两个半段试样紧密拼合后,才能准确测量。为此一个能适应这项工作的专用工具就显得十分必要。磁性延伸收缩测量架就是结构简单,操作方便,易于加工制造的这样一种测量专用工具。经我们多年使用感到效果令人满意。 1984年第5期磁性延伸收缩测量架的结构如图1所示。条形磁铁(按需要的长度选购)与叉形架紧密配合在一起。叉形架下部的小轴插入支柱
In the tensile test, the specimen after breaking to measure the elongation and cross-sectional diameter of the contraction. Elongation and contraction measurements, one in the portrait and one in the landscape. Therefore, the specimen needs to be rotated through 90 ° (or to measure the person’s movement position). Coupled with the sample has been pulled off, you must first two half-section of the sample close together before accurate measurement. For this purpose a special tool to adapt to this work is very necessary. Magnetic extension and contraction measuring frame is a simple structure, easy to operate, easy to manufacture such a measurement-specific tools. After years of use we feel satisfied. 1984 No. 5 magnetic extension contraction measuring frame structure shown in Figure 1. Bar magnet (optional length required) and the fork frame closely together. The lower shaft of the fork is inserted into the column