Drill rods made of hexagonal hot-rolled steel of 55C2, 3OHGSFA, 12XHZA, 30XMA, 28XGNZM, 40X2AUF and others break during perforator drilling. The rods break in the areas of shoulder, shank, cone part, as well as along the length of the main part of the hexagon. The most frequent breakages occur in the bump zone, which is obtained by hot-drilling on boring machines.
Повышение долговечности быстроизнашивающихся деталей оборудования является актуальной задачей всех отраслей народного хозяйства. Проблема имеет особо важное значение для горных машин в связи с условиями эксплуатации, вызывающими интенсивное разрушение (изнашивание, изломы, деформации) деталей, заменяемых или восстанавливаемых при ремонте оборудования ...
In the branch laboratory of mechanization of labor-intensive work at the Department of Design of Mining Machines and Technology of Mechanical Engineering LMI developed a draft regulation on preventive maintenance of equipment of mica mines MPSM USSR ...
The analysis of the organization of repair work at mica mines shows that preventive maintenance of technological, lifting and transport, electrical, heat and power and other equipment is carried out both by two- and three-species structure, using in the cycle of average repair ...
