We can see that many technological transformation projects of enterprises are scattered all over the factory. Busy workers can be seen everywhere, they either focus on equipment debugging, or nervously carry out parts replacement, showing a busy scene.
The replacement of spare parts is a common work in the technological transformation and equipment maintenance of enterprises. The basic principle of parts replacement is "restoration", that is, it must be restored to its original state (without sufficient reason). It is best to
replace parts with parts provided by the original equipment processing plant. But often they can only be processed and replaced by themselves. In this case, if there are drawings in the equipment file, new parts can be processed and replaced according to the drawings. If not, it is necessary to map out the drawings and process them according to the drawings. In addition to the same size as the original, all kinds of technical conditions and processing quality requirements should be the same as the original. I can't make it!
In reality, for the sake of the so-called fast, the so-called convenience on the scene, sometimes P (repair) to P, almost can be installed even if it is completed.
Recently, I saw a construction photo that seemed to replace the cover plate of a component body. The bolt holes on the
cover plate are cut by acetylene oxygen in the field. If there is a technical level, the holes cut and blown out can not be round, and the holes can not be smooth (clean). Why not go to the (bench) drilling machine for regular processing after drawing lines as they are! After formal processing, it can basically be installed as soon as possible, and it is completely as it is. In such an irregular screw hole processing method, it is a big probability event that some holes have to be blown up in the process, and then a large washer has to be added when installing bolts or nuts, which obviously can not be restored to the original state. The acetylene oxygen cutting blow hole is also higher than machining drilling method in terms of energy consumption and carbon emission.
