A W4-60 excavator, due to the excessive rotation of the boom during the unloading process, the arm movement lost its stability, causing the bottom of the boom to tear, resulting in downtime. To this end, we use the "plywood rib" method to weld it.
First remove it with the "Drilling by Light" method. It should be noted that in order to remove the boom, the pin must be removed. The traditional disassembly method is to first hoist the cab and then exit the slightly axle, which is both time-consuming and unsafe, and can not be quickly repaired. It is very effective to use the “drilling by light†method to remove the hole with a diameter of 16mm in the cab. The hole is close to the edge of the pin, so that the iron bridge can be inserted into the pin, which is also convenient for installation. Look at the alignment of the axis and the hole. In the field or field conditions, you can also cut a small hole with gas. This method can save 80% of the time compared with the traditional method, and it is safe and reliable.
Then use the "plywood rib" method to weld repair. First heat the area to be welded with an oxygen-acetylene flame, calibrate with a press, and clean the surface oil and dirt. E5016 low hydrogen potassium type electrode is used, the core diameter is 3.2mm, DC reverse connection, current is 100A. Spot the front side first, then spot the back side, and finally weld the side to reduce distortion. After the overall welding is completed, the welding slag is removed and the weld formation is checked. Then use an angle grinder to smooth the upper part of the weld to facilitate the reinforcement of the board. Two pieces of iron plate with the specification of 300mm×100mm×10mm are used for “plywood fixing ribâ€, and the side is reinforced with iron plate with the specification of 150mm×100mm×10mm. The welding current is adjusted to 110A, the joint is lapped, and the angle of the welding rod is adjusted to 45. Degree, straight line, one-shot molding, and then remove the welding slag.
Finally, the installation is carried out by the “moving the car†method. Use a crane, loader or excavator to lift one end of the welded boom and start the excavator to be repaired (note that the inlet and return pipes are docked to prevent oil leakage), so that the base pin hole and movement The arm sleeve holes are aligned and the boom is lowered. Check the alignment position of the boom pin sleeve hole and the base pin hole through the small hole punched in the cab, and then slowly push the pin into the pin sleeve hole to complete the installation. This lifting is not only light weight but also safe, and it is more convenient and efficient to install. You are responsible for the consequences of the news you send, so please follow the law and pay attention to language civilization.
First remove it with the "Drilling by Light" method. It should be noted that in order to remove the boom, the pin must be removed. The traditional disassembly method is to first hoist the cab and then exit the slightly axle, which is both time-consuming and unsafe, and can not be quickly repaired. It is very effective to use the “drilling by light†method to remove the hole with a diameter of 16mm in the cab. The hole is close to the edge of the pin, so that the iron bridge can be inserted into the pin, which is also convenient for installation. Look at the alignment of the axis and the hole. In the field or field conditions, you can also cut a small hole with gas. This method can save 80% of the time compared with the traditional method, and it is safe and reliable.
Then use the "plywood rib" method to weld repair. First heat the area to be welded with an oxygen-acetylene flame, calibrate with a press, and clean the surface oil and dirt. E5016 low hydrogen potassium type electrode is used, the core diameter is 3.2mm, DC reverse connection, current is 100A. Spot the front side first, then spot the back side, and finally weld the side to reduce distortion. After the overall welding is completed, the welding slag is removed and the weld formation is checked. Then use an angle grinder to smooth the upper part of the weld to facilitate the reinforcement of the board. Two pieces of iron plate with the specification of 300mm×100mm×10mm are used for “plywood fixing ribâ€, and the side is reinforced with iron plate with the specification of 150mm×100mm×10mm. The welding current is adjusted to 110A, the joint is lapped, and the angle of the welding rod is adjusted to 45. Degree, straight line, one-shot molding, and then remove the welding slag.
Finally, the installation is carried out by the “moving the car†method. Use a crane, loader or excavator to lift one end of the welded boom and start the excavator to be repaired (note that the inlet and return pipes are docked to prevent oil leakage), so that the base pin hole and movement The arm sleeve holes are aligned and the boom is lowered. Check the alignment position of the boom pin sleeve hole and the base pin hole through the small hole punched in the cab, and then slowly push the pin into the pin sleeve hole to complete the installation. This lifting is not only light weight but also safe, and it is more convenient and efficient to install. You are responsible for the consequences of the news you send, so please follow the law and pay attention to language civilization.
Rolling Mill Bearing Engineering Parts
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