"Plywood rib" method welding correction excavation maneuvering arm bushing

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"Plywood rib" method welding correction excavation maneuvering arm bushing
Source: China Bearing Network Time: 2014-06-25
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A W4-60 excavator; because the boom reversed too much during the unloading process; the arm movement lost and stabilized; the bottom of the boom was torn at the bottom; the stop was caused. To this end; we adopted the "sandwich" "The law will strengthen its welding.
First use the "hole drilling by light" method to open. Notice; to remove the boom; it is necessary to withdraw the pin. The traditional method of opening is; first lift the driving room; then exit the slightly axis; this is a waste Time is not safe; more can not quickly repair. It is useful to use the "drilling by light" method to open; that is, drill a hole with a diameter of 16mm in the driving part of the positive pin (the hole is close to the margin of the pin; Plug in the iron bridge to pull out the pin; also facilitate the alignment of the axis and the hole when the device is installed. In the field or field conditions; you can also cut a small hole by gas cutting; this method can save time compared with the traditional method 80 %; and safe and reliable.
Then use the "plywood solid rib" method to weld the correction. First use the oxygen-acetylene flame to heat the place to be welded; use a press to proofread; and sort out the external oil and dirt. Use E5016 low hydrogen potassium type electrode; the core diameter is 3. 2mm ; DC reverse connection; current is 100A. First spot welding front; then spot welding the opposite side; final welding side; to reduce deformation. After the completion of welding; remove the welding slag, check the weld forming condition. Then use the angle grinder Some of the welded parts are flattened; it is easy to be reinforced by the board. Two sets of iron plates with a standard of 300mmÃ—100mmÃ—10mm are used for â€œplywood ribsâ€; the side faces are reinforced with iron plates of standard 150mmÃ—100mmÃ—10mm; Adjust the welding current to 110A; lap joint; adjust the welding rod to 45 degrees; straight line; one-time forming; then remove the welding slag.
Finally, the "moving car stepping" method is used. Lift the end of the welded boom with a crane, loader or excavator; start the excavator to be repaired together (focus on docking the inlet and return pipes; to avoid oil leakage) Stepping; aligning the base pin hole with the boom sleeve hole; lowering the boom. View the alignment of the boom pin sleeve hole and the base pin hole through the small hole punched in the driving room; then slowly knock the pin shaft The hole is set in the hole; that is, the device is completed. This lifting is not only the component is lightened and safe; the device is more convenient and efficient.
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