A sheet leveler is a device used to straighten metal profiles, rods, pipes, wires, etc. The sheet leveler uses straightening rolls to compress and change the straightness of bar materials. Generally, there are two rows of straightening rolls, with different numbers. There are also two-sided sheet levelers that rely on the changes in angle of the two sides (concave in the middle, hyperbolic rolls) to straighten materials of different diameters. The main types include pressure sheet leveler, balance roller sheet leveler, shoe roller sheet leveler, rotating reverse bending sheet leveler, etc.
The process of sheet leveler: the position of the roller and the movement direction of the straightened product form a certain angle. Two or three large rolls are active pressure rolls, driven by an electric motor to rotate in the same direction. Several small rolls on the other side are driven pressure rolls, which rotate by friction with the rotating bar or pipe. To achieve the compression required by the roller for the product, these small rolls can adjust their position simultaneously or respectively forwards or backwards. Generally, the more the number of the rollers, the higher the precision of the product after straightening. After the product is bitten by the roller, it constantly moves in a straight line or rotation, thus making the product bear compression, bending, flattening and other deformations, and finally achieving the purpose of straightening.
Another abnormal phenomenon of the sheet leveler is poor lubrication. Due to the small clearance between the newly assembled parts and the assembly and other reasons of the sheet leveler manufacturer, the lubricating oil is not easy to form a uniform oil film on the friction surface to prevent wear, which reduces the lubrication efficiency and causes early abnormal wear of the parts. In serious cases, it will cause scratches or jamming of the friction surfaces with precision fits, resulting in faults.
Excessive wear rate is still one of the abnormal phenomena of sheet leveler. Due to the influence of the processing, assembly and commissioning of the sheet leveler parts, the contact area of the fitting surface is small and the allowable twisting distance is large. When the sheet leveler operates, the concave and convex parts of the surface of the parts engage in friction, and the shed metal chips continue to participate in the friction as abrasive, accelerating the wear of the fitting surface.
In general, the sheet leveler cannot be operated according to the instructions or explored by oneself, especially when casting the sheet leveler, attention must be paid to ensure the activity of the casting alloy, and the wall of the casting must be uniform and not too thick.
If a reasonable wall connection is to be made, it must have a circular structure. The casting should largely avoid large horizontal surfaces to prevent problems with the casting when the sheet leveler shrinks. Another point to note is that the supplier of the sheet leveler should keep the casting structure as simple as possible and reduce the occurrence of parting surfaces, keep the parting surfaces straight, prevent the falling off of charged parts. In the modeling process, if this occurs, generally do not use the core.
