The rolling mechanism of the rolling mill often lacks oil and is blocked, which makes the roll gap of the rolling mill difficult to adjust. The gear sleeve of the rolling mill often leaks oil during the installation and disassembly process, which causes the tooth casing to be disassembled again and the spare parts are consumed seriously; the dry oil pipeline often Being blocked, the rolling mill is seriously deficient in oil, and the internal parts are seriously worn; during the production process, the roll bearings burn out frequently; during the rolling process, the rolling mills are easy to loose and the shaking is large. The sealing form of the original rolling mill screw is a labyrinth seal. This seal is only in the middle of the sleeve. The iron oxide skin and water at both ends of the sleeve are easy to enter. Finally, the pressing mechanism is short of oil and blocked, so that the pressing mechanism cannot be Adjust the roll gap. In order to eliminate this phenomenon, the seal form is changed to a wool felt integral seal. In this way, the iron oxide scale and water are difficult to enter, thereby fundamentally eliminating the phenomenon that the pressing mechanism cannot move.
The toothed sleeve and thin-walled sleeve of the rolling mill adopts a tapered surface and a keyless interference type. This joint requires high matching dimensions and machining precision. In the actual installation and assembly process, due to the quality of spare parts processing, it often leads to frequent The oil leaks so that the sleeve cannot be installed and removed. In this part, the connection method with no key and large interference is adopted. If the high-pressure oil can not be used for disassembly, the tooth cover must be cut off each time the roll is replaced, so that the roll can be taken out, so the waste of spare parts is extremely serious. Finally, after repeated calculations and repeated practice, the tolerance between the toothed sleeve and the thin-walled sleeve is increased, that is, the interference is compensated, thereby solving the oil leakage problem. On the other hand, the tracking of the quality of the spare parts is strengthened. This made the situation better solved.
The main reason for the burnout is that the number of times of rolling mill disassembly and assembly is too large, resulting in a large gap of the chock bearing seat, which reduces the assembly precision of the rolling mill, resulting in frequent occurrence of events in the production of the burnt bearing. By strengthening the maintenance of equipment, strengthening the supervision and management of the spare parts quality of the roll chocks and roll bearings, the mill is stabilized and the vibration is reduced as much as possible, so the situation is obviously improved. The dry oil pipeline of the rolling mill was originally a slender and curved copper pipe. At the beginning, the imported dry oil was used. The situation was ok. Later, when the domestic oil MoS2 was used, the blockage often occurred, which made the rolling mill lack oil and could not work normally. Now the use of large pipes, to adapt to the characteristics of domestic oil, can meet the needs of production. The sloshing of the rolling mill is serious. One of the main reasons is that the gasket has a gasket at both ends of the roller. In the production process, due to heat, it is easy to soften and loosen, and the roller is easy to move, so that the entire frame is shaken. Now use a special material to firmly fix the roll in its original position, and the frame is no longer shaken by the gasket being softened by heat.
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J.B Machinery (Ningbo) Co., Ltd. , https://www.jbdrill.com