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The quality of rubber screw and barrel directly affects the product quality and production efficiency. When the two parts are badly worn or break, they need to be repaired. Today we will focus on the causes of screw breakage and repair methods.

Fracture cause analysis:

1. Macro reasons

The fracture of rubber screw is the damage caused by low cycle fatigue. The source and area of fatigue crack propagation can be clearly seen on the surface of the broken screw, the instantaneous fracture is in the area of the screw, and the root and surface cracks of the screw are often the source of fatigue crack. Under the action of time, the fatigue crack will continue to expand outward.

2. Micro reasons

Through microscopic observation of screw fracture, the fatigue fringe in the fatigue crack growth zone is discontinuous or oriented. Usually the fatigue fringe corresponds to a stress cycle, which is basically the brittle fringe.

The zone range of the transient fracture shows some fluvial patterns, cleavage cracks, and secondary cracks in the section, but no dimples.

Repair method introduction:

How to repair after rubber screw break? We can make a new screw from the old one. Wear-resistant alloys can also be thermally sprayed on the surface of the screw and then polished to improve the corrosion and wear resistance of the screw.

Alternatively, the screw can be coated with hard chrome. This chromium molecule has good corrosion and wear resistance, but the hard chromium layer is relatively easy to peel off.

Rubber screw fracture, according to the price to decide the choice of replacement or repair. If the repair cost is more expensive than the replacement, it is better to get a new one.