Entering the hot rolling workshop of the steel plant, huge cylindrical components rotate at high speed with a roar, and the red steel billets are crushed and stretched from coarse blocks into flat steel plates.

1、The application of rolling mill: the "shaping cornerstone" of infiltration industry

The core function of the rolling mill is to apply pressure through rotation, causing plastic deformation of the metal, just like a rolling pin processing dough, but it faces hard materials such as steel. Its application scenarios have already permeated every aspect of industrial production, from daily necessities to national treasures, all of which cannot be separated from its "carving".

In the steel industry, rolling mills are the core force in steel forming. The steel billets coming out of the steelmaking furnace need to be quickly compressed by coarse rollers to remove defects, and then finely processed by fine rollers to finally become threaded steel for construction, spring steel for automobiles, and cold-rolled sheets for household appliances. China's annual steel production of tens of millions of tons relies entirely on rolling mills.

In the high-end manufacturing field, the performance of rolling mills is of utmost importance. Titanium alloy sheets used in aerospace require precision rolling with special rollers at high temperatures to ensure uniform thickness and maintain the special properties of the alloy, ensuring the safety of aircraft components.

2、The core feature of rolling mill: the "hardcore strength" that has been tempered through countless trials and tribulations

The rolling mill may seem like a simple cylindrical component, but it is actually composed of three parts: the roll body, the roll neck, and the shaft head. Each part has a clear division of labor: the roll body is the working part that directly contacts the metal and needs to be wear-resistant and heat-resistant; The roller neck is installed in the bearing seat to support the overall weight; The shaft head is connected to the transmission device to transmit rotational power. This structure may seem simple, but it has to withstand hundreds of tons of rolling force and hundreds of degrees of high temperature testing, thus possessing three core characteristics.

One is durability and impact resistance. During the rolling process, the rollers need to continuously rub against hard metal and withstand periodic alternating cold and hot impacts, which can easily lead to problems such as wear and cracking. Therefore, high-quality rollers need to be made of special materials such as cold hard cast iron, cast steel, and alloy steel. Some high-end rollers may also use hard alloys, which have a service life of 5-10 times that of ordinary rollers. Jiangyin Wanheng relies on its own accumulation in metal material research and development and general equipment manufacturing to optimize the material ratio of rolling rolls. Through precision heat treatment processes, it improves the wear resistance and impact resistance of rolling rolls, effectively extends their service life, and reduces maintenance costs for downstream enterprises.

The second requirement is extremely high precision. Especially for the precision rolling rolls, the surface accuracy needs to reach the micrometer level, and the thickness error of the steel plate can be controlled within 0.01 millimeters to meet the stringent requirements of high-end fields such as electronics and aviation. Jiangyin Wanheng, as a national high-tech enterprise, has multiple technical patents. With precise processing technology, it can customize rolling rolls of different precision levels according to customer needs. The straightness and coaxiality errors of the rolling rolls produced are precisely controlled, suitable for high-precision rolling needs, and help improve the quality of downstream products.

Thirdly, it has strong customization adaptability. Rollers are not a universal component that can be used interchangeably. They need to be customized according to the rolling material, product specifications, and working conditions. Coarse rolling mill focuses on "strength" and is used to process initial steel billets; The precision rolling mill focuses on "precision" and determines the final product size and surface quality; The support roller focuses on "stability" to provide support for the work roller and prevent deformation. Jiangyin Wanheng, with rich industry experience, can design and produce suitable rolling rolls for different scenarios such as aluminum extrusion and steel forging. From material selection to structural design, they fully meet customer production needs.

3、The difference between rolling mill and shaft: resembling miraculous "industrial components"

Many people confuse rolling mills with shafts. Although both are cylindrical rotating components and rolling mills include shaft heads, necks, and other structures similar to shafts, their core functions, structural designs, and usage requirements are fundamentally different, which can be described as "similar in appearance and extraordinary in appearance".

From the perspective of core functions, the main function of a shaft is to transmit power and torque, support rotating components such as motor shafts and machine tool spindles, and only ensure stable rotation without direct contact with the processed workpiece or bearing high-intensity crushing loads. The core function of the rolling mill is "shaping", which requires direct contact with the metal billet, applying pressure through its own rotation to cause plastic deformation of the metal. It not only needs to transmit power, but also withstand huge rolling force and friction loss. It is an "active processing" component, rather than a simple "support transmission" component.

From the perspective of structural design, the structure of the shaft is relatively simple, mostly a single cylindrical shape with a smooth surface, and does not require special working layer design. It only needs to ensure sufficient strength and coaxiality. The structure of the rolling mill is more complex. The rolling body, as the working part, may be a smooth cylindrical shape or have rolling grooves, and a wear-resistant and high-temperature resistant working layer needs to be designed. The rolling neck and shaft head are auxiliary structures, respectively responsible for support and force transmission. The overall structure needs to balance strength, precision, and wear resistance. Jiangyin Wanheng focuses on optimizing the connection between the working layer of the roll body and the roll neck and shaft head in the design of the rolling mill, ensuring both the wear resistance of the working layer and the stability of the overall structure, avoiding damage caused by uneven local stress.

From the perspective of material and process, the material of the shaft is mostly ordinary steel, and the processing technology is relatively simple. It only needs to go through basic processes such as turning and grinding to meet the requirements of strength and accuracy. And the rolling mill needs to use high-strength and high wear resistant alloy materials, and some also need to use special processes such as centrifugal casting and differential heat treatment to create a composite structure, so that the rolling body has a wear-resistant surface and the core has strong toughness. The processing difficulty is much higher than that of ordinary shafts. Jiangyin Wanheng, with its own technological innovation capabilities, integrates metal material processing experience into roll production. Through precise material ratios and heat treatment processes, the rolls achieve a balance in strength, wear resistance, and stability.