Repair cracks on the side panels of the micro excavator arm
Posted: Feb 11th, '25, 21:31
When checking whether the weld on the side panel of the welding machine is rusty, it is necessary to scrape or grind the paint or rust on the weld and hit the weld with a small hammer. If necessary, use a magnifying glass to observe.
1. Causes of cracking
The causes of cracks in the side plate of the excavator cantilever beam include welding itself, small household excavators, bubbles, slag inclusions and microcracks. When the excavator is overloaded, the original weld will crack and slowly expand. The cracks in the electrode do not match the performance of the plate. Because the size of the excavator arm is large, it is difficult to use reliable and effective methods. Heating and insulation methods. After welding, the hardened part of the parent material around the weld is not completely removed, which will reduce the welding strength: excavator. During operation, the vibration and impact are large, and the welded parts are damaged due to the uneven force of the welded parts.
2. Repair method
Preparation before welding: Manually shovel oil, paint, rust, etc. on the original weld with a grinding wheel. The boring machine can cut the welding cracks and cut into the body of the side plate to remove the hardened area of the previous welded base plate. After shaving, use an inclined grinding stone to smooth the cut (the internal interface is polished into a V-shaped groove). After cleaning and painting, please make sure that the cracks are found and cleaned.
According to the current protection conditions, select a 5mm electrode as the electrode, bake it at 350°C for 2 hours, and then insulate it at 100°C with a welding current of 190 to 230A to prevent the electrode from absorbing moisture. Before welding the excavator plate, the weld must be preheated to 150-250°C. During the welding process, the small orchard excavator can be welded to the segment and recovered symmetrically. Continuously use it during the cooling of the weld. The hammer is used to hit the weld metal to relieve stress. When welding at the corners of the side plate, in order to prevent or cause arc faults, continuous welding is required to improve the joint stress.
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1. Causes of cracking
The causes of cracks in the side plate of the excavator cantilever beam include welding itself, small household excavators, bubbles, slag inclusions and microcracks. When the excavator is overloaded, the original weld will crack and slowly expand. The cracks in the electrode do not match the performance of the plate. Because the size of the excavator arm is large, it is difficult to use reliable and effective methods. Heating and insulation methods. After welding, the hardened part of the parent material around the weld is not completely removed, which will reduce the welding strength: excavator. During operation, the vibration and impact are large, and the welded parts are damaged due to the uneven force of the welded parts.
2. Repair method
Preparation before welding: Manually shovel oil, paint, rust, etc. on the original weld with a grinding wheel. The boring machine can cut the welding cracks and cut into the body of the side plate to remove the hardened area of the previous welded base plate. After shaving, use an inclined grinding stone to smooth the cut (the internal interface is polished into a V-shaped groove). After cleaning and painting, please make sure that the cracks are found and cleaned.
According to the current protection conditions, select a 5mm electrode as the electrode, bake it at 350°C for 2 hours, and then insulate it at 100°C with a welding current of 190 to 230A to prevent the electrode from absorbing moisture. Before welding the excavator plate, the weld must be preheated to 150-250°C. During the welding process, the small orchard excavator can be welded to the segment and recovered symmetrically. Continuously use it during the cooling of the weld. The hammer is used to hit the weld metal to relieve stress. When welding at the corners of the side plate, in order to prevent or cause arc faults, continuous welding is required to improve the joint stress.
Buy a small excavator, buy a second-hand small excavator, buy excavator parts, sell excavator parts, buy a small excavator
Choose DIG-DOG for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.dig-dog.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com