Gír nákvæmni

Gear accuracy refers to a grade of the comprehensive error of the gear shape, including some important parameters such as tooth profile, tooth direction, radial runout, etc. The tooth shape refers to the radial shape of the tooth, and the tooth direction refers to the longitudinal direction of the tooth. Shape and diameter jump refer to the error of the distance between two adjacent teeth. Generally, the gears used in our automobiles can be processed by a gear hobbing machine and can be used in 67 stages. However, some printing machines require high-precision due to high-speed operation and batch printing. Gears reduce the error caused by the accumulation of gears and reduce the printing effect. Domestically produced gear grinding machines can be processed to grades 4 to 5, and imported high-precision gear grinding machines can be processed to grades 3 to 4, and more Some can be processed to level 2. The Japanese standard DIN 0 grade is equivalent to the 4 grade judged by China, the general error is in μm, 1μm=0.001mm