论文部分内容阅读
当被测量极微时,精确测量磨损往往是一个问题。遇到象气缸套曲面和金属的厚度进不去或者不能测量时就更困难了。耐久试验时缸套直径在试验开始前测一次,试验结束时再测一次。在正常情况下多数可以测得已经产生的磨损量。用量缸表或内径千分尺测量精度可达0.005英寸（0.0127毫米）,这种方法没有考虑变形或者温度的变化,而这些变化在发动机运转过程中很可能已经发生,所以这种方法不适合在运转过程中测量很微小的磨损量。
Accurate measurement of wear is often a problem when measured extremely small. Encountered like cylinder liner surface and the thickness of the metal can not go in or can not measure even more difficult. Durability test cylinder liner diameter test before the start of a test, test again at the end of the test. Under normal circumstances most can measure the amount of wear has been produced. The measuring cylinder or ID micrometer can measure up to 0.005 in. (0.0127 mm) with accuracy. This method does not account for deformation or temperature changes that may have occurred during engine operation, so this method is not suitable for operation In the measurement of very small wear.