Roll fatigue rupture preventive measures - Roll management and maintenance use

(1) The residual stress on the surface of the rolls after grinding cannot be completely eliminated, so it is necessary to determine the hardness value before and after grinding of each pair of rolls to do long-term tracking and master the performance status of the rolls. This is conducive to the timely revision of a reasonable grinding process. In addition, the normal rolling rolls unloaded from the mill, the main operator of the mill should be in the roll change single fill in the rolling time, rolling tonnage, the reason for changing the rolls, etc., the mill can make appropriate adjustments to the amount of grinding through the use of the situation. In order to make the natural elimination of stress, the roll must be naturally cooled to 25 ℃ ~ 30 ℃ before regrinding. The complete process data should be recorded for each regrinding of the roll.

2023-03-01

Application of Simulation Technology in Roll Development

Simulation application is aimed at improving process technology methods, improve product quality, master the process of cold roll forming, reduce the roll repair and modify the design, save production commissioning costs. Cold roll forming process simulation is inseparable from the experience of roll designers and molding equipment installation and commissioning process.

2023-03-01

Roll surface curve of rolls

An improved roll cooling, roll seam lubrication device, an improved roll cooling, roll seam lubrication device, belongs to the technical field of rolling mill. Used to solve the existing device exists in the lubricant film is not uniform, easy to mix into the residual cooling water and other defects. Composition is located in the roll seam entrance on the upper and lower cut water plate,

2023-03-01

Analysis of elastic deformation of rolls

The main factors affecting the elastic deformation of the mill are: roll bending, plaque deformation, roll flattening, deformation of other parts and hydraulic cylinders and the compression deformation of the liquid in the cylinder, of which the first three accounted for the majority of the elasticity of the mill, and these three in the roll deformation accounted for the largest proportion of roll bending and roll flattening can be used to solve the theory of elastic deformation of the roll [ 1 , 10] - for the ordinary four-roll mill roll deformation made The following assumptions are made

2023-03-01

How to fix rollers the quick way

Roller with super adhesion, excellent compressive strength, wear resistance and corrosion resistance and other generalized functions, the use of polymer composite materials in the transmission part of the relatively small wear specification can be on-site non-disassembly correction,

2023-03-01

Analysis of the causes of broken rolls in rolling mills

First, brittle fracture, the shape of the fracture of such rolls is relatively flat, the fracture around the surface of the roll body is relatively flush; Second, the toughness of the fracture is mostly "mushroom head" shape, the roll body near the fracture are crushed into pieces.

2023-03-01