Common Problems in the Pre-installation Preparation Stage
1. Hidden dangers due to omissions in tool appearance inspection
It was judged that the cutting tool was usable just because no obvious wear or chipping was observed on the blade with the naked eye. However, problems such as uneven cutting and film tearing occurred after installation.
② Cutting tool accessories (such as screws and gaskets) have hidden deformations, which make them unable to be tightly fixed after installation, resulting in loosening of the cutting tools.
①. Illuminate the edge of the blade with strong light and observe if there are areas with uneven reflection. If such areas exist, it indicates that the blade edge has defects. You can also gently touch the blade edge with your fingertips (remember to wear protective gloves) to feel for any unevenness. If present, the blade needs to be replaced.
②. When checking tool accessories, fit the screws with standard washers and observe whether they can be tightened smoothly. If there is jamming or loosening after tightening, the corresponding accessories need to be replaced; for the flatness inspection of the washers, place them on a horizontal glass surface and check for gaps. If there are gaps, they need to be replaced.
Ⅱ. Incomplete cleaning of components
When cleaning the tool handle, fixture contact surfaces, and mounting holes, only the surface dust was wiped off, while stubborn oil stains or metal debris were not dealt with, resulting in inaccurate tool positioning after installation.
①. Residual oil stains will reduce the friction between components, causing slight displacement of the tool during operation;
②. If metal debris gets stuck in the mounting holes or the gaps of the contact surfaces, it will prevent the cutting tool from fitting closely to the mounting datum plane, affecting perpendicularity and coaxiality.
①. Soak a cloth in industrial alcohol or a special cleaning agent, and repeatedly wipe the handle of the knife and the contact surface of the fixture until there is no obvious oil stain on the cloth. For stubborn oil stains, apply a small amount of cleaning agent, let it sit for 5 minutes, then scrub with a hard brush (with soft bristles to avoid scratching the components).
②. Use compressed air (with the pressure controlled between 0.4-0.6MPa) to blow air into the mounting hole to remove internal debris; if the debris in the hole is difficult to blow out, a thin iron wire (with the head polished smooth to avoid scratching the hole wall) can be used for gentle cleaning, and after cleaning, use compressed air again to blow and confirm.
