Corrugated roller repair process on corrugated board production line

Corrugated roller is the most expensive heart component in corrugated board production line. Its E flute corrugated roller type rationality, manufacturing precision, wear resistance and pressure resistance, service life and running speed are the main technical indicators to measure its quality and economy. The import and domestic corrugated paperboard board production lines in the industry tend to be more and more wide in width, and the need for faster and faster operation is directly related to the product quality and economic benefits of the carton enterprises.

Corrugated paper in the high-speed continuous marching iron bending process, under the influence of online pressure and the corrugated roll dome relative displacement of the friction squeeze rolling, inclusions in the paper and mineral hard particles impact, so that the top of the crucible wear, From the arc to the flat head gradually, the height of the rake tooth is slowly lower than the standard lower limit. At the same time, some corrugating rollers with low hardness on the boring face will cause pits and depressions on the cul-de-sac surface.

Due to the fact that the production line is often not full of paper, the surface of the cardboard corrugated roller is unevenly worn and the roller is concave. The low-hardness corrugating roller will collapse, tilt, twist, ellipticity and runout errors due to plastic deformation under continuous high-speed single-tooth meshing and directional operation conditions, which affects the service life and economy of the corrugating roller.

How to improve the sharp wear and deformation phenomenon in the above corrugating roller operation, prolong the service life of the corrugating roller in high speed operation, and improve the economical efficiency of the corrugating roller is an important issue that has been paid attention to by the corrugated paperboard carton industry in China for many years.

Using alloy steel precision forging materials with stable chemical composition, wear-resisting and pressure-resistance, advanced hardened layers of hardness HRC58 (HS80) are obtained with advanced heat treatment process, and computer-aided design of reasonable crucibles is realized by CNC grinding machines. Precisely grinding enamel-shaped and drum-shaped mid-height, surface-plated high-quality micro-crack wear-resistant hard chrome is the high-quality corrugating roller that has been painstakingly researched and repaired for years, and has been carefully researched and repaired with abrasion resistance, corrosion resistance, high precision and durability. New technological achievements achieved by the product.

Featured material

China's current steel standards, the same chemical composition of a wide range of grades, the upper and lower limits are often connected with adjacent brands (such as the domestic carbon corrugated roll commonly used 35CrMo carbon content and other chemical composition upper limit is in the 42CrMo the lower limit Internal), and the chemical composition error of the same brand of steel, bring great harm to the quality of heat treatment control.

We all know that the level of carbon content will directly affect the hardness of quenched martensite in the carton box corrugated roller alloy steel roll body. For example, the carbon content of the alloy steel is 0.3%, and the martensite hardness is (HRC) 49-55. The carbon content is 0.4%, and its martensite hardness is (HRC) 54-60. The carbon content is 0.5%, and its martensite hardness is (HRC) 58-62.

Therefore, rigorous selection of materials, selection of high-quality 42CrMo and 50CrMo precision forgings, strict chemical composition of the good material off, the carbon, chromium, silicon, manganese, aluminum and other major components of the index is controlled within a certain range, for the subsequent preparation of heat treatment and Quenching quality and stability create the basic conditions.
High quality chrome plating

Hardened and fine-ground corrugated roller surface is plated with hard chromium plating of 0.1 mm or more, which can reduce the friction coefficient of the surface of the crucible, enhance the wear resistance of the crucible, and prolong the service life of the corrugating roller.