我厂过去生产的各种曲轴,由于粗车后各轴颈间存在着较大的误差,而且表面不光洁,使得检测困难,经常发生误判和误检的情况。后来我们根据三爪夹头的三个爪分度是120°与曲轴分度一样的道理,利用三爪夹头来检测曲轴分度和直线度,极大地提高了检测效率,克服了误判和误检的问题。 I produced a variety of crankshaft plant in the past, due to rough after the existence of the journal between the larger error, and the surface is not smooth, making the test difficult, frequent miscarriage of justice and misdemeanors. Later, according to the claw claw claw three indexing is 120 ° and the same indexing of the crankshaft, the use of three jaws to detect crankshaft indexing and straightness, which greatly improves the detection efficiency, to overcome the misjudgment and False positive question.