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为了减少测试缸套内表面淬火硬度的破坏损失,我们设计了一种专用辅具（见图1）,装在HDI-187.5洛布维硬度计上,进行非破坏性测试,经两年来生产实践验证,该辅具完全可以满足技术要求,工作可靠,数据准确。 该辅具由弓形测杆及工件支承两部分组成。其要求是:测杆应有足够刚性,能在加总负荷时无任何变形,且保证压头与原测头安装孔同心,使之在加负荷后全部负荷毫无损失地加到工件预测表面。工件支承部分应保证工件被测表面呈水平位置,使工件中心线与硬度计测头中心线在同一个垂直平面内。其具体结构见图1。
In order to reduce the damage loss of the quench hardness on the inner surface of the test cylinder liner, we designed a special aids (see Figure 1) mounted on the HDI-187.5 Robovic Durometer for non-destructive testing after two years of production practice Verify that the auxiliary can fully meet the technical requirements, reliable work, accurate data. The auxiliary by the arcuate rod and workpiece support two parts. Its requirements are: rod should be rigid enough to be able to add any load without deformation, and to ensure that the pressure head and the original probe mounting hole concentric, so that after the load is fully loaded without loss to the workpiece surface prediction . Workpiece support parts should ensure that the surface of the workpiece is a horizontal position, so that the workpiece center line and the hardness of the probe center line in the same vertical plane. The specific structure shown in Figure 1.