Some precautions for hot forging machine maintenance
Release time:
2021-07-12
During the repair and disassembly of the hot forging machine, other mating surfaces on the transmission shaft should be checked, such as whether the mating surfaces with the gear and flywheel are worn, abraded, and corroded. When the wear, grinding, and corrosion are not serious, sandpaper or a fine oilstone can be used for polishing; after polishing the grinding wheel, electroplating should be applied.
When repairing the rolling bearings of the hot forging machine, pay attention to checking the wear and grinding damage of the roller jade raceway. Minor wear can be polished with sandpaper; severe wear requires replacement. Check the fit between the inner ring and the transmission shaft, and the outer ring and the bearing seat. A transition fit is used between the outer ring and the bearing seat. If the outer ring rotates, the outer ring should be removed for inspection. If the wear is slight, replacement is not necessary. Only the worn part can be polished with sandpaper, and a bearing seat with pitting (or sealant) should be used. If the wear is significant, the bearing needs to be replaced, and the mating surface should be repaired.
When the rolling bearings of the hot forging machine are removed from the shaft, it should be noted that, as far as possible, do not forcefully pull them down in a cold environment, as this can easily deform the bearings and their mating surfaces. You can heat it before removing the bearing.
The main forms of damage to the gears of a hot forging machine are dry friction wear and broken teeth. Dry friction wear on the gear surface is mainly caused by poor lubrication; therefore, when the gear surface is worn, it should be repaired promptly. If the gear is worn due to foreign objects falling into the gear, the worn part can be polished with a fine oilstone or sandpaper. During long-term operation of the gear, the gear wear becomes increasingly severe, and the noise and impact during gear transmission will increase, so timely repair and replacement are necessary.
The repair of hot forging machine gears can adopt the method of large-displacement gears, that is, repairing the gears through the negative displacement processing of large-displacement gears, replacing the small gears, and the newly equipped small gears are processed according to the positive displacement of the large-displacement gears.
Lubrication is the key to precision forging technology, determining product quality and cost, and greatly affecting the life of the mold. Lubricating the relative moving surfaces of the mold and workpiece can reduce the direct contact between the mold and the workpiece, reduce wear and forming force, facilitate the smooth progress of the hot forging machine production process, and extend the life of the mold. In order to build an ecological civilization society and guide macroeconomic policies, the production methods of the forging industry are gradually shifting towards green forging. Green forging is a modern production method that comprehensively considers environmental factors and resource utilization.
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