What is different between 6 hi and 18 hi cold rolling mill

author: Glimpse

2022-12-27

The difference between 6 Hi cold rolling mill and 18 Hi cold rolling mill
The difference between the 6 Hi cold rolling mill and the 18 Hi cold rolling mill is mainly in terms of the following aspects:

First of all, from the form of the torii of the cold rolling mill, the structure of the two types of the two types of cold rolling mills is almost the same, and there is no obvious difference. Figure 1 and 2 show the mechanical composition diagram of 6 hi cold rolling mill and 18 hi cold rolling mill respectively.

Secondly, from the vertical layout of the roller system, they are all six rolled rollers, with two sets of working rollers, middle rollers and support rollers.

Thirdly, the core difference between the two is the layout of the horizontal roller system. Compared with the 6 Hi cold rolling mill, the 18 Hi cold rolling mill is arranged around the upper and down working rollers with 4 sides of the support roller system. The working roller diameter of the 18 Hi cold rolling mill is much smaller than the 6 Hi cold rolling mill. Table 1 shows the common roller system parameters of 6 rolls and 18 His. In order to meet the dual needs of stable rolling rolling, the 18 -roller cold rolling mill was eliminated to reduce the rolling rolling. The roller is stable.

In addition, the supporting roller balance device of the 6 Hi and 18 Hi cold rolling mill and the mechanical structure and functions of the bend roller device of the middle roller are basically the same; in the structure of the channeling roller device of the middle roller, the 6 Hi cold rolling mill uses the channeling roller beam structure to achieve the intermediate Rolling rollers, and the 18 Hi cold rolling mill uses the channeling roller bearing seat structure for channeling rollers;

There is a difference on the work roller bending roller. The 6 Hi cold rolling mill has a working roller bending device, while the 18 Hi cold rolling mill does not.

From the perspective of the transmission method, the 6 Hi cold rolling mill is mostly working rollers, partly the middle roller transmission, and the 18 Hi cold rolling mill is the middle roller transmission.

Figure 1: 6 hi cold rolling mill roll system

Figure 2: 18 Hi cold rolling mill roll system

At present, 6 cold rolling mills are used in the cold rolling field of high -strength steel. Rolved steel types include HSLA, 65MN, C20, DP and TRIP, etc. The tensile strength of the steel is not more than 800 MPa. MPA's advanced high -strength steel has many problems such as excessive rolling force, high -end tactile stress on rollers, difficulty in plate -shaped control, and insufficient ability to press down. In recent years, the 18 -roller cold rolling mill has gradually been applied in the field of high -strength steel rolling. It has been put into production with Baosteel 18 Hi cold rolling mills and the construction of Shougang Jingtang 18 cold rolling mills under construction. Its main rolling products can cover all steel types rolled in 6 cold rolling mills, and can rolled advanced high -strength steel, such as 780DP/TRIP, 980DP and other high -strength steels with more than 800 MPa, or even more than 1000 MPA. In addition, from the perspective of rolling thin specifications with steel, the 6 Hi cold rolling mill is a single machine reversible layout or rolling layout. Due to the large diameter of the work roller, the rolling thin specifications are limited, and the 18 rolls are 18 rolls. Due to the small diameter of working rollers, cold rolling mills can roll thinner steel with steel. The 18 cold rolling mill on the thin specification with steel rolling has obvious advantages.

In the requirements of the domestic cold -rolled steel factory, Glimpse Technology has renovated the 6 Hi cold cold rolling mill into 18 Hi cold cold rolling mills, so that the customer's product portfolio can be expanded to obtain more market share.

Keywords: 6 Hi cold rolling mill, 18 Hi cold rolling mill, difference, cold rolling mill