Roll paper rotary press roller bearing used to install

Roll paper rotary press roller bearing used to install 2020 - 11 - 29 press roller bearing is applied to the shaft on both ends of the drum, ensuring the smooth running and printing process of clutch pressure, the pressure regulating structure precision bearing. Precision and printing machine printing precision roller bearing before the printing press roller bearing fault, directly or indirectly will be reflected on the operation and the product, just did not cause our attention. Sometimes take more drum packing method, make the printing pressure, printing quality problems such as uneven ink is resolved, but it will therefore exists printer can't reproduce the problem of administrative levels of more than 80% of the site. We meet the press of the roller bearing fault to roughly two categories. A broken, racks, inner ring and outer ring of the track surface spalling and make the ball movement, causes the mechanical lock, this kind of fault obvious, must after repair, printing machine can run normally. In fact, this kind of failure before cause serious mechanical lock already exists in another type of failure, namely the brace, inner ring and outer ring of the track surface wear, this kind of failure performance is not obvious, the main influence printing quality and is often not easy to the attention of the people of the faults in the printing machine maintenance, since the printing machine can run normally. In the process of paper printing, when fracture and tape winding drum, makes the entangled parts of the stress increases suddenly, cause local damage, bearing lubrication failure, increases the bearing clearance of injury, caused by uneven surface pressure of printing. If the lubrication is failure state for a long time, the orbit of bearing inner ring and outer ring surface is due to long-term wear make serious bearing clearance increases, it usually show the printing pressure, printing quality ink unevenness, field such as hair, serious when make prints of less than 30% of the paste mesh network loss, more than 70% of the branch. Printing press roller bearing caused by fault, and some can be offset by operating, others can't offset from the operation, what is involved in this case the need for roller bearing maintenance problems. When each printer manufacture factory, has its fixed printing precision index, such as network representation and overprint precision, the indicators are the basis of we are used to determine the print quality. Then print, we also can judge printing machine running roughly can achieve printing precision, can produce the required accuracy according to its print, can determine whether to repair on it. Second, the printing press roller bearing fault prevention through the analysis of printing press roller bearing fault happens, you can see, to prevent the printer roller bearing the loss of accuracy and first selected printer used lubricating oil, the kinds of and change in time; Next, want to keep printing machine tension system normal working condition, often maintain printer tension system, the stable output tension, to reduce the winding roller printing paper tape in the process of fracture. In addition, choose suitable raw materials is also an effective way to reduce printing press roller bearing failure. The installation of press bearing pressure should be directly in the tight fit on the ring width, shall not be passed on roller pressure, bearing installation commonly adopt the following methods: bearing outer ring and bearing hole tight fit, inner ring and the shaft is a loose fit, bearing can be pressed into the bearing hole, first should be slightly smaller than the assembling casing diameter hole diameter. If the bearing ring and shaft and hole is a tight fit, install indoor ring and outer ring to pressure into the shaft and hole, at the same time assembling casing structure should be able to at the same time, so the bearing inner ring and outer ring end face. Heated by heating the bearing or bearing seat, Shanghai printing using thermal expansion will fit into a loose fit installation method. Installation method is a kind of common and energy saving. This method is suitable for interference quantity larger the installation of the bearing, the bearing before hot charging type or separable bearing ring into the fuel tank 80 - uniform heat 100 ℃, and then loaded on the shaft, as soon as possible out of the oil to prevent inner ring after cooling end face and shoulder joint is not tight, bearing axial fastening again after cooling. Bearing outer ring and light metal bearing seat tight fit, by heating the hot charging method of the bearing, can avoid the mating surface scratch. Heating tank with bearing and should be at a certain distance from the bottom of a mesh, or hanging hooks in the bearings, bearing on the bottom, in case of heavy impurities into the bearing or uneven heating, fuel tank must have a thermometer, strictly control the oil temperature shall not exceed 100 ℃, in order to prevent the tempering effect, reduce the hardness of the ring. （ Source: web rotary printing technology)