阳光直射对铸铁平台铲刮精度的影响
时间：2015/12/25 15:06:17
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阳光直射对铸铁平台铲刮精度的影响,当车间里的铸铁平台在阳光直射的情况下。我们使用铸铁平尺着色研磨时会发现，铸铁平台平面忽然凸起，铸铁平尺稍加用力几乎能在上面转起来。一般人都会认为是铸铁平台表面变形！其实不是的。 实验记录证明铸铁平板温度每升高1摄氏度平面度会鼓大约5微米。
结合以上数据我们得到以下结论：铸铁平尺的研磨面突然遇到高于它表面的温度会形成双金属片效应，用于研磨的接触面涨长从而向另一面弯曲所以才有我们看到的以上情况。
所以在阳光直射时我们用铸铁平尺研磨铸铁平板时候，要把铸铁平尺也同样放置于阳光下让它的工作面跟铸铁平板工作面一样受热。这样研磨出的着色点才基本显示出铸铁平板的平面度情况。结合温度变化对于铸铁平板的影响；只有这样铲刮出来的铸铁平板才能达到我们要求的。
The effect of direct sunlight on the accuracy of the shovel scraping of the cast iron platform, when the cast iron platform in the workshop is in direct sunlight. When we use a cast iron flat bar for coloring and grinding, we find that the plane of the cast iron platform suddenly rises, and the cast iron flat ruler can be turned up almost with a little force. Most people think that the surface of the cast iron platform is deformed! Actually not. The experimental record proves that the cast iron plate temperature will be approximately 5 microns per 1 degree Celsius flatness.
Combining the above data, we have the following conclusion: the sudden encounter of the polished surface of the cast iron flat ruler with the temperature above its surface will form a bimetal effect, and the contact surface for grinding will grow longer and bend to the other side so that we can see it. The above situation.
Therefore, when we use a cast iron flat to grind a cast iron plate in direct sunlight, we should place the cast iron flat also in the sun so that its working surface is as hot as the cast iron plate. The colored dots thus polished show the flatness of the cast iron plate. Combined with the effect of temperature changes on cast iron plates; only the cast iron plates scraped out of this way can meet our requirements.
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