To determine whether the parts of DCY280-48.87-IIS hard-tooth surface gear reducer need to be replaced, the following methods can be used:
How to judge gears
Appearance inspection : Disassemble the reducer housing and check whether there are scratches, pitting, peeling, broken teeth, etc. on the surface of the gear. The normal tooth surface should be smooth. If metallic luster wear marks or black sludge adheres, it may be abnormal wear.
Dimension measurement : Use a tooth thickness caliper and a dial gauge to measure the wear amount of tooth thickness. The standard tooth thickness tolerance is usually ±0.05mm. It can also be judged by the engagement gap. The normal engagement gap is generally 0.1-0.3mm, depending on the model. If the tooth thickness wear exceeds 10% of the original thickness, or the meshing gap exceeds 50% of the standard value, replacement should be considered.
Operating status monitoring : When starting the computer, monitor for abnormal noise, such as sharp friction sounds and periodic impact sounds. At the same time, the bearing temperature is detected. Under normal circumstances, the bearing temperature is ≤70℃. If it exceeds 80℃, abnormal heat may occur due to gear wear. Further check whether the gear needs to be replaced.
How to judge bearings
Appearance inspection : Check whether the roller elements and raceways of the bearings have defects such as wear, cracks, pitting, etc.
Rotation check : Rotate the bearing by hand to feel whether it rotates flexibly, whether it has stagnation or abnormal resistance. If so, it may need to be replaced.
Method of judging axis
Appearance inspection : Check whether the gear shaft is bent and deformed and whether the journal is worn.
Repair feasibility assessment : For slight bending deformation, the straightening method can be used for repair; if the journal is worn, the journal size can be increased by electroplating, spraying, etc. before grinding. However, if the bending deformation is severe or the journal wear cannot meet the specified accuracy requirements through repair, it needs to be replaced.
Method for determining seals : Observe whether there is oil leakage or oil leakage from the reducer. If so, it may be that the seal is aging or damaged and needs to be replaced.
How to judge other parts
Box : Check whether there are cracks and deformations in the gearbox body, and whether there is obvious wear in the seat holes that match the bearing. Welding repair is allowed when cracks occur in the box and box cover, but if the bearing hole wears beyond the next level of fit, or the bolt hole cannot be repaired through the expansion level of repair after wear, it needs to be replaced.
Coupling : Check whether the coupling joints at the high and low speed ends are worn and the shaft, whether the parts of the elastic components are installed are deformed and worn, and whether the elastic connectors are worn. If the requirements do not meet the requirements, replace them.
