Turning drum:

Generally, the main shaft of the drum can be divided into the following two types according to the load condition: 1) the spindle only bears the bending moment, such as the shaft of the drum group; 2) the rotating shaft bears the bending moment torque at the same time, such as the shaft of the transmission drum group; the material of the shaft is generally rolled forged carbon steel alloy steel, the common material is medium carbon steel, the 45 steel is commonly used, for the larger force the ruler The shaft with limited size some special requirements can be made of alloy steel with material of 40 chromium. According to the needs, the shaft generally needs heat treatment surface strengthening treatment to improve its mechanical properties. At general temperature, the difference of elastic modulus between alloy steel carbon steel is very small, so the use of alloy steel can improve the stiffness of shaft; the material of shaft is generally quenched tempered For the transmission drum group, when the shaft strength index does meet the requirements, it can also be selected tempered, checked according to the allowable stress of symmetrical cycle bending.