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湿砂型表面硬度计是测定砂型表面硬度的仪表。我们从理论和实验两个角度,探讨了国内外三种基本形式的硬度计(简称A、B、C型)的测值范围和实用性,深感A、B、C型硬度计的设计由于受历史局限性的缘故,其测值范围同现实生产和科研工作的需要很不相适应。本文介绍了笔者设计的一种新型硬度计,为区別起见,记为D型。D型湿砂型表面硬度计,从理论分析,样机的实验室工艺实验及第一汽车厂生产现场测试结果表明:D型硬度计具有测值范围广,分辩能力强,结构紧凑,使用方便之特点,可
Wet sand surface hardness tester is a measure of sand surface hardness meter. From two aspects of theory and experiment, we discuss the measurement range and practicability of three basic types of hardness testers at home and abroad (A, B, C type), and deeply feel the design of A, B, C type hardness testers Due to the limitations of history, the measurement range is not suitable for the needs of actual production and scientific research. This article describes a new type of hardness tester designed by the author, for the sake of distinction, recorded as D type. D-type wet sand surface hardness tester, from the theoretical analysis, prototype laboratory test and the first automobile factory production site test results show that: D-type hardness meter has a wide range of measurement, the ability to distinguish, compact, easy to use features ,can