(3) Maintain the machine tool on time, and timely remove the dirt and grease from the guide rails, the slide plate, the oil hole and the dead corner, and prevent the dirt from entering between the friction surfaces to form the abrasive wear type.

Third, the friction machine repair <br> <br> research Once the research hurt injury occurs, it must be immediately stopped, identify the causes and extent of the injury research, take different measures. Generally speaking, for a kind of smear, you can not repair it, but you should strengthen the lubrication to prevent expansion. For scratches (including scratches caused by dirt), remove the dirt and scrape it with oil stone or scraper. After the parts have been leveled, they can continue to operate: the damage caused by gluing, biting and hard particles must be repaired. Nowadays, there are some simple introductions to the repair of several types of friction pairs:

1. Sliding bearing and shaft repair (1) After the surface of the sliding bearing is injured, the preferred repair solution should be repaired by the scraper method. In general, the plain bearings have a margin for adjustment and repair that can be used to meet a repair cycle of the machine. If the injury is very serious and the repair allowance cannot be met, it needs to be considered for replacement. After the two-and-a-half-type sliding bearing is damaged, the gasket can be reassembled and the precision of the inner hole of the bearing bush can be scraped.

(2) After the journal has been wounded, the method of grinding the small journal and replacing the sliding bearing can be used. However, the journal grinding should not be too large, such as the machine tool spindle, the grinding amount should not exceed the surface quenching of the journal, or the thickness of carburizing, nitriding, cyanidation, the surface hardness of the journal after grinding should not be lower than the lower limit of the original design hardness. For the drive shaft, the journal should not be smaller than the size of the front journal or boss in the assembly direction when assembled.

If the weld is used to repair the journal, consider the effect of the weld repair process on the geometric accuracy, mechanical strength and surface hardness of the shaft. After the journal repair, it is generally necessary to refit the journal as a sliding bearing (or bushing).

2. Repair of machine guide rails For minor flaws and abrasions on the machine guide rails, you can continue to operate with a knife or oilstone repair. For gluing damage, it needs to be repaired by welding or filling and filling. Even for a large area of ​​the wound, as long as a large part of the intact rail surface is retained, it can be repaired by such methods. After the machine has been ordered three times and five times, it will be repaired by fine planing, fine grinding or sticking board and paneling.

Previous page next page