During the use of electric hoist hooks, cracks may occur. The electric hoist has a compact structure, and the electric hoist with the motor axis perpendicular to the reel axis adopts a worm gear transmission device. The disadvantages are: large length, large size in width, bulky structure, low mechanical efficiency, and difficult processing. The hydraulic system is dual-controlled, and the overflow regulating valve and magnetic contact pressure gauge can accurately control the pressure. The electrical control department uses low voltage control to increase the safety of the control system. Some users directly use welding to save money. Increased the security of the control system. This operation is not safe. Let's take the hoist as an example to explain why the electric can't repair the damage of the hoist hook? Repair welding is a process of partial melting, melting and solidification of metals. When you repair welding, the base of the low-gap chain hoist hook near the repair welding will be heated and cooled to varying degrees due to heat conduction, but this only heat treats this part, and this changes the microstructure of this part. And performance, and most of the welding is for the wear depression of the hook, and the depression is on the same straight line as the vertical dangerous part. Repair welding will destroy the metal structure refinement and metal fiber sequence arrangement of the hook, thereby reducing the mechanical performance of the equipment. Note: The hook head is forged heat treatment. The forging process is a method of hot metal processing. The forging process is the process of refining metal structure and arranging metal fibers. Heat treatment is to eliminate internal stress and further improve the mechanical properties of the metal. Understand why the damage of the electric hoist hook cannot be repaired? It is hoped that this situation will be avoided during the future use of the electric hoist. After the hook is cracked, it will be scrapped in time, which not only ensures the safety of the operation, but also effectively prevents the damage of other components of the hoist.