1.Roll ringPrecautions for installation and use The installation of carbide roller rings should pay attention to the following points:

1. The roll ring machine shall strictly check the roll ring size according to the process design requirements. In order to ensure the same batch of roller rings, it is more suitable for the same batch of attack with the same brand of roller rings, matching roller ring material. The performance and density should be consistent. If there is a difference, it will affect the dynamic balance and the use effect of the roller ring.

2. Roller ring installation and roller ring. The matching surface between the roller shaft and the roller cone sleeve and the sleeve should be kept clean, and the matching place should be kept clean and reasonable. The assembly should not be too tight or too loose. If the assembly is too tight, the rolling temperature will increase. At this time, the roller ring is in a state of large tensile stress, once the rolling force is shaken, it will cause the roller ring to crack radially, so that the roller ring is cracked and scrapped. If the combination is too loose, the roller ring and the roller shaft will slide relative to each other, resulting in frictional heat, resulting in thermal stress and cracks in the roller ring. In severe cases, the roller ring and the roller shaft taper sleeve can be discarded. Therefore, the installation pressure of the roller ring should be strictly controlled.

3. Roll ring is a brittle material. It is heavy and easily damaged. Therefore, collision is strictly prohibited during the installation, transportation and handling of the roller ring. Wait.

2. Reasonable Determination of Rolling Volume

Roll ring single groove rolling to a certain time. When the rolling groove produces a certain yield, the micro crack gradually becomes larger. When the depth reaches 0.2mm ~ 0.4mm, offline grinding should be carried out, otherwise it is of great significance to reasonably arrange and control the rolling amount after grinding.

3. rollingRoll ringCooling and water quality requirements.

1. In the production process, the roller ring is impacted by alternating force. With the expansion of the thermal crack of the mesh, the thermal fatigue crack is easy to produce. Serious will cause alloy spalling, and even cause roller fracture. In order to prevent the roller ring from cracking, reduce the hot corrosion of the roller ring surface at high temperature, delay the propagation of cracks, extend the service life of the groove, and ensure the reasonable cooling of the roller ring.

2. The cooling water pressure range is controlled at 0.4~0.6mp. The small flow rate of each attack should be 18m 3/h, the water volume of the last two frames should reach 24m 3/h, and the spray should be directly sprayed into the rolling groove at an angle of 15~30 ℃ in the radial direction of the rolling ring and the rotation direction.

3. In the rolling process, the ph value of cooling water has a great influence on the corrosion of cemented carbide. Cobalt corrosion is intensified, especially the service life of roller rings with pure cobalt as binder is greatly reduced. In this case, a roller ring based on nickel adhesive, I .e. a ygr series roller ring, should be used. The composition of solid particles in the water roller ring, in the glueRoll ringupper corrosion due to high rolling speed and high rolling pressure. The corrosion of the roller ring is aggravated, so the cooling water should be regularly precipitated and purified.

4. roller ring in the rolling precautions.

1. Ensure that the rolling ring is in a normal cooling state. When the cooling water pressure is too low or water blocking measures are suddenly taken immediately, and red steel is prohibited from finishing, otherwise the rolling mill will cause batch roller spraying accidents.

2, strictly control the rolling temperature, finish rolling pile steel accident, do not happen to immediately turn off the water, maintain a certain cooling time, deal with the waste after rolling, the cutting machine should try to stay away from the roller ring, to prevent the roller ring local heating.

3. The iron dust in and around the roller ring of the finishing mill should be cleaned up in time. Prevent the roller ring from biting into the groove when rotating, causing the roller ring to break. Machine feeding temperature, prohibit roller ring low temperature rolling. When installing the guide guard of the finishing mill, be sure to keep the same spacing with the roller ring to prevent friction between the guide rail and the roller ring. Therefore, friction heat affects the normal use of the roller ring.