陽(yáng)光直射對鑄鐵平臺鏟刮精度的影響
時(shí)間：2015/12/25 15:06:17
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陽(yáng)光直射對鑄鐵平臺鏟刮精度的影響,當車(chē)間里的鑄鐵平臺在陽(yáng)光直射的情況下。我們使用鑄鐵平尺著(zhù)色研磨時(shí)會(huì )發(fā)現，鑄鐵平臺平面忽然凸起，鑄鐵平尺稍加用力幾乎能在上面轉起來(lái)。一般人都會(huì )認為是鑄鐵平臺表面變形！其實(shí)不是的。 實(shí)驗記錄證明鑄鐵平板溫度每升高1攝氏度平面度會(huì )鼓大約5微米。
結合以上數據我們得到以下結論：鑄鐵平尺的研磨面突然遇到高于它表面的溫度會(huì )形成雙金屬片效應，用于研磨的接觸面漲長(cháng)從而向另一面彎曲所以才有我們看到的以上情況。
所以在陽(yáng)光直射時(shí)我們用鑄鐵平尺研磨鑄鐵平板時(shí)候，要把鑄鐵平尺也同樣放置于陽(yáng)光下讓它的工作面跟鑄鐵平板工作面一樣受熱。這樣研磨出的著(zhù)色點(diǎn)才基本顯示出鑄鐵平板的平面度情況。結合溫度變化對于鑄鐵平板的影響；只有這樣鏟刮出來(lái)的鑄鐵平板才能達到我們要求的。
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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