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零件上的形位公差要求有三种情况:一是较高精度的;二是一般精度的,可以用通用设备加工达到;三是低精度的,用通用设备加工也绰绰有余。因此,在标注的时候,对于高精度和低精度的公差值就必须要标注,一般精度的公差值就不必标注,而由通用设备的精度来保证。 3.1 图样上注出公差值的规定 3.1.1 关于注出公差值 正式国家标准GB1184—80附录一规定了直线度、平面度、平行度、垂直度、倾斜度、同轴度、对称度、圆跳动和全跳动的公
There are three conditions for the tolerance of the form and position on the part: First, higher precision; Second, the general accuracy can be achieved by general equipment; Third, low precision, more than enough for processing with common equipment. Therefore, when marking, the tolerance value for high-precision and low-precision must be marked, and the tolerance value of the general accuracy is not required to be marked, but is ensured by the accuracy of the common equipment. 3.1 Drawing out the provisions of the tolerance value 3.1.1 On the out of tolerance values The official national standard GB1184-80 Appendix I provides a straightness, flatness, parallelism, verticality, inclination, concentricity, symmetry , Round beating and full beating public