Intermediate roller contour of intermediate roller movable type convexity high-accuracy control temper mill

Abstract

The invention relates to an intermediate roller contour, in particular to an intermediate roller contour of an intermediate roller movable type convexity high-accuracy control temper mill. The intermediate roller contour of the intermediate roller movable type convexity high-accuracy control temper mill consists of three continuous line segments, wherein a polynomial curve equation of a head roller contour is y=A2x<2>+A4x<4>+A6x<6>+A8x<8> by taking a crossing point of a head part and an intermediate segment as an origin of coordinates, axial direction of the intermediate roller as an X axis and radial direction of the intermediate roller as a Y axis; and in the equation, the origin of coordinates is the crossing point of the head roller contour and the intermediate segment, the axial direction of the intermediate roller is the X axis, the radial direction of the intermediate roller is the Y axis, R' is radius difference between roller bodies of two roller-shaped ends of the head, and L1 is more than 0 and less than or equal to L/3 and the R' is more than 0 and less than R. Through the roller contour, a forced-contact condition is greatly relieved, contact pressure between rollers is uniformly distributed, a peak value of the contact pressure is greatly reduced, the improvement on the service periods of the rollers is facilitated, a set value of rolling force is reduced, the service life of the rollers is prolonged, and the risk of roller spalling is reduced.

Description

technical field [0001] The invention relates to a roll shape of an intermediate roll, in particular to an intermediate roll roll profile of a moving intermediate roll convexity high-precision control leveling machine. Background technique [0002] As one of the most important products of the iron and steel industry, plate and strip play a very important role in the development of the national economy. It is widely used in industry, agriculture, national defense and daily life. With the rapid development of modern industry and science and technology, the vast number of users of industrial enterprises have put forward more and more strict requirements on the quality of plates and strips. [0003] Such as figure 1 As shown, the current two-stand six-roll intermediate roller movable crown high-precision control skin pass machine (referred to as HCM skin pass machine) includes two groups of work rolls 1, intermediate rolls 2 and support rolls 3 arranged symmetrically up and dow...

AI Technical Summary

Problems solved by technology

The working roll 1 of the frame adopts textured roll, the surface roughness is very large, and Ra is about 1.3 μm, so that the end of the working roll 1 after pressing is very worn, and the end of the working roll 1 after being off the machine is light blue after quenching , some can’t even continue to grind and can only be scrapped, which not only reduces the operation rate of the skin pass mill, but also increases the roll consumption and the amount of unqualified strip steel caused by changing rolls, which affects the physical quality level of the strip steel

[0007] (2) The plate shape adjustment ability of the middle roll 2 shifting roll cannot be exerted

The current roll-shaped ends of the intermediate roll 2 are rounded, and the ability to eliminate the pressure is not strong, and a large amount of roll shifting is required to reduce the pressure. At this time, the length of the contact line between the rollers varies greatly from large to small. The peak value of the contact pressure between the rolls increases sharply, the wear of the backup roll 3 and the work roll 1 is intensified, and even problems such as roll surface peeling and roll burst occur

[0009] (3) The actual elongation of some specifications cannot reach the set value

At present, when producing T-4 and T-5 materials with a thickness of 0.18mm, even if the rolling force and intermediate tension reach the upper limit (1176 tons, 300MPa), the specified elongation cannot be reached

It can be seen that the existence of pressing has seriously restricted the elongation control ability of the tempering machine

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