Reasons for cracks and cracks in steel wheels of road rollers

1. The welding material of the road roller is unqualified
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Due to unqualified welding rods, the strength of the weld seam is insufficient during use and it is easy to vibrate and crack. After the cracks are generated, due to the stress concentration, the vibrating cylinder cavity will be torn apart.
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2. The welding process is unqualified when leaving the factory
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The original machine has welding quality defects during the welding process, such as slag separation, broken welding, undercut, impermeable welding, etc., which are easy to form stress concentration and cause fracture.
3. Unreasonable steel wheel design
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The materials used in the original steel wheel design were unqualified, and the size was unqualified. The material strength of the steel wheel is different from that used in the vibrating chamber of the side plate. Due to the change of the construction environment, the tensile strength formed by the vibrating steel wheel and the measuring plate of the vibrating chamber is different, resulting in cracking.
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4. Fatigue damage caused by improper maintenance and operation
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During use, the air hole of the steel wheel is blocked, so that the gas in the vibration chamber is easy to form a high-pressure shock wave, which impacts the steel wheel cavity, and ruptures at the stress concentration points in the steel wheel cavity, and these stress concentration points happen to be these welds place.
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5. Steel wheel overload operation
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Working in the range of 95% to 98% compaction for a long time will easily cause the steel wheel material to reach the fatigue limit or the working time of the steel circle itself will expire to form fatigue damage, resulting in cracking. The vibration cracks of the front wheels are smaller than the vibration cracks of the rear wheels. The reason is that due to the needs of construction, the vibration time of the rear wheels is longer than that of the front wheels. resulting in cracking.