Coal Crushing And Screening Plant

Customer's Background:

What is the breakage of the Coal Crushing And Screening Machine bolt?

For the production process of Coal Crushing And Screening Machine, the existence of bolts mainly serves to fix internal parts. If the bolts fail, internal parts such as falling off and breaking will not only affect the production of equipment. The process will also shorten the life of the machine, so the phenomenon of bolt failure needs to be dealt with in time. Here we will analyze the problem of how the bolt breakage is going on.

Generally speaking, during the working process of the Coal Crushing And Screening Machine, the bolt will be repeatedly stretched by the equipment and the motor bracket, causing fatigue and fracture, but if it is not properly operated during production, The process of accelerating this fracture has been analyzed and found to be mainly due to the acceleration of the fracture caused by the following aspects.

1. The contact surface between the motor bracket and the Coal Crushing And Screening Machine lower frame is too small

In the interior of the machine, the high-strength bolt connection relies on the friction between the contact surfaces of the connectors to prevent them from slipping each other. If the contact surface is too small, the motor bracket and the Coal Crushing And Screening Machine will be removed. The relative contact of the body contact surface causes a huge shear force at the bolt contact surface, causing the bolt to break. In view of this phenomenon, to prevent the phenomenon of fracture, the calculation of the contact surface should be done first;

Second, there is a gap between the motor bracket and the lower body of the equipment.

If the motor bracket and the Coal Crushing And Screening Machine lower frame joint surface are short, a slight gap will be generated. This will cause a severe impact load on the joint surface, and the motor bracket will also sway up and down, making it easy to Bolt breakage, in view of this phenomenon, in the production, to prevent the occurrence of the gap between the two, is an important condition to reduce bolt breakage;

Three, bolt pre-tightening force does not meet the requirements

In the interior of the Coal Crushing And Screening Machine, the high-strength bolts are tightened with a torsion wrench, which causes the bolt to produce a large and controlled pre-tension. Through the nut and the backing plate, the connected parts are also produced. The same amount of pre-pressure. If the pre-pressure is large and small, the joint surface will be unevenly stressed, which will cause the bolt to break. Therefore, in the production, the control of the pre-tightening force is very important;

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