The high-precision mirror core is a cylindrical object that is worn in the middle of the high-precision mirror shaft core or in the middle of the wheel or in the middle of the gear, but a few are square. High-precision mirror cores are mechanical parts that support rotating parts and pick them up to transmit motion, torque or bending moments. The metal is in the shape of a round rod, and each segment can have a different diameter. The parts of the machine that make the rotary motion are mounted on a high-precision mirror core.

The torsional stiffness check of the high-precision mirror core is the calculated torsional deformation of the high-precision mirror core, measured by the twist angle of the core of each high-precision mirror core. The torsional deformation of the high-precision mirror core should affect the performance and working accuracy of the machine. For example, the torsion angle of the high-precision mirror core of the internal combustion engine cam is too large, which will affect the correct opening and closing time of the valve. The gantry crane motion mechanism drives the high-precision mirror core. The torsion angle affects the synchronism of the drive wheels; the high-precision mirror cores that are at risk of torsional vibrations and the high-precision mirror cores in the steering system require large torsional stiffness.

Machining Accuracy 1) Dimensional Accuracy The dimensional accuracy of high-precision mirror-axis core parts mainly refers to the diameter dimensional accuracy of high-precision mirror cores and the high-precision mirror core length accuracy. According to the requirements of use, the diameter accuracy of the main high-precision mirror shaft core neck diameter is usually IT6-IT9 grade, and the precision high-precision mirror shaft core neck can also reach IT5 grade. The high-precision mirror core length is usually specified as the nominal size. For the step height of the stepped high-precision mirror core, the tolerance can be given according to the requirements of use. 2) Geometric precision High-precision mirror-axis core parts are supported by two high-precision mirror-axis cores on high-precision mirror cores. These two high-precision mirror cores are called high-precision mirror cores. The neck is also the assembly reference for high-precision mirror cores. In addition to the dimensional accuracy, the geometrical accuracy (roundness, cylindricity) supporting the high-precision mirror core neck is also required.

        For high precision mirror cores with a high precision, the geometric error should be limited to the diameter tolerance. When the requirements are high, the tolerance values specified in the part drawings should be specified separately. 3) High-precision mirror-axis cores (high-precision mirror-axis cores for assembly transmissions) in high-precision mirror-axis core parts with respect to each other. Relative to high-precision mirror cores supporting high-precision mirror-axis cores Degree is a general requirement for their mutual positional accuracy. Generally, the high-precision mirror core with normal precision has a precision of 0.01-0.03mm for the radial beating of the high-precision mirror core, and the high-precision and high-precision mirror core is 0.001-0.005mm. In addition, the mutual positional accuracy has the same high-precision mirror axis core degree of the inner and outer cylindrical surfaces, and the perpendicularity requirement of the high-precision mirror axis core positioning end face and the high-precision mirror axis core wire. 2. Surface roughness According to the precision of the machine, the running speed is high, and the surface roughness requirements of the high-precision mirror core parts are also different.

        In the normal case, the surface roughness Ra of the high-precision mirror core neck is 0.63-0.16 μm; the surface roughness Ra of the high-precision mirror core neck is 2.5-0.63 μ.