CN-116159867-B - Method for adjusting large opening degree of short stress rolling mill

CN116159867BCN 116159867 BCN116159867 BCN 116159867BCN-116159867-B

Abstract

The invention provides a method for adjusting large opening degree of a short stress rolling mill, which comprises the following steps of removing parameters incapable of adjusting roll gap change in the short stress rolling mill, reserving the parameters capable of adjusting roll gap change in the short stress rolling mill to obtain reserved parameters, determining one parameter from the reserved parameters as the roll gap adjustment parameters, determining roll gap adjustment preconditions according to the roll gap adjustment parameters, and designing a large opening degree roll gap adjustment device according to the reserved parameters and the roll gap adjustment preconditions. The invention screens out the reserved parameters, determines the roll gap adjustment precondition according to the reserved parameters, designs the large-opening-degree roll gap adjusting device through the reserved parameters and the roll gap adjustment precondition, and can adjust the roll gap opening degree.

Inventors

TONG WUPENG
LI YAN
CHEN JUN

Assignees

中钢集团西安重机有限公司

Dates

Publication Date: 20260512
Application Date: 20230303

Claims (3)

1. The method for adjusting the large opening degree of the short stress rolling mill is characterized by comprising the following steps of: Step one, eliminating parameters which cannot adjust the roll gap change in a short stress rolling mill; Step two, reserving parameters capable of adjusting roll gap change in the short stress rolling mill to obtain reserved parameters; step three, determining a parameter from the reserved parameters as a roll gap adjusting parameter; step four, determining a roll gap adjustment precondition according to the roll gap adjustment parameters; step five, designing a large-opening-degree roll gap adjusting device according to the reserved parameters and roll gap adjusting preconditions; The short stress rolling mill comprises an upper bearing seat for installing an upper roller, a lower bearing seat for installing a lower roller, and a supporting seat for guiding the relative movement of the upper bearing seat and the lower bearing seat, wherein the upper bearing seat and the lower bearing seat are connected with 4 pull rods through 4x2N nuts, the 4N nuts are fixed on the upper bearing seat and connected with the upper parts of the 4 pull rods, the 4N nuts are fixed on the lower bearing seat and connected with the lower parts of the 4 pull rods, and the pull rods are used for rotating to adjust the distance between the upper bearing seat and the lower bearing seat so as to realize the opening degree adjustment of the upper roller and the lower roller, wherein N is more than or equal to 1; The large-opening roll gap adjusting device comprises an upper accommodating cavity, a lower accommodating cavity, an upper bearing seat boss and a lower bearing seat boss, wherein the upper accommodating cavity is formed on the surface of an upper bearing seat opposite to the surface of a lower bearing seat of the lower bearing seat, the lower accommodating cavity is formed on the surface of the lower bearing seat opposite to the surface of the lower bearing seat, the upper bearing seat boss is arranged in the upper accommodating cavity, and the lower bearing seat boss is arranged in the lower accommodating cavity; The upper bearing seat boss is provided with a protruding part, the protruding part faces the lower bearing seat boss, the lower bearing seat boss is provided with a concave part, and the opening of the concave part faces the upper bearing seat boss; the lower edge of the upper bearing seat is positioned in the middle of the height direction of the protruding part, and the upper edge of the lower bearing seat is positioned in the middle of the depth direction of the recessed part.
2. The method of claim 1, wherein the eliminating parameters in the first step include: The center of the bearing hole of the upper bearing seat of the short stress rolling mill is up to the height of the lower edge of the upper bearing seat of the short stress rolling mill the height from the center of the bearing hole of the lower bearing seat of the short stress rolling mill to the upper edge of the lower bearing seat of the short stress rolling mill the height of the guide surface of the supporting seat; The retention parameters of the second step include: the opening degree of the rolling mill and the height from the lower edge of the upper bearing seat of the short stress rolling mill to the upper edge of the lower bearing seat of the short stress rolling mill; the third step, the roll gap adjusting parameter is the height from the center of the bearing hole of the lower bearing seat of the short stress rolling mill to the upper edge of the lower bearing seat of the short stress rolling mill; And step four, the precondition for adjusting the roll gap is that the supporting seat of the short stress rolling mill always keeps stable guiding for the upper bearing seat and the lower bearing seat.
3. The method for adjusting a large opening degree of a short stress rolling mill according to claim 2, wherein the supporting seat of the short stress rolling mill always keeps stable guiding for the upper bearing seat and the lower bearing seat, comprising: When the short stress rolling mill has the maximum opening degree, the large opening degree roll gap adjusting device ensures that the upper bearing seat and the lower bearing seat are not separated; When the minimum opening degree of the short stress rolling mill is reached, the roller gap adjusting device with large opening degree ensures that the upper bearing seat and the lower bearing seat do not interfere.

Description

Method for adjusting large opening degree of short stress rolling mill Technical Field The invention relates to the technical field of metal rolling, in particular to a method for adjusting large opening degree of a short stress rolling mill. Background The short stress rolling mill has high rigidity, shortest stress line during rolling, high product precision, stable operation, simplicity, convenience, uniform rolling force dispersion, long service life of the bearing, high operation efficiency, low cost, greatly reduced equipment weight, correspondingly reduced specifications of matched parts such as bearings and the like, and reduced investment cost, and the rolling mill is used for installing and adjusting the rollers, guides and the like corresponding to rolling products in advance during roll changing and off-line states, thus saving downtime. The short stress rolling mill is the dominant type of the existing bar and wire rolling mill due to various advantages. The short stress rolling mill core mainly comprises a roll gap adjusting device, a pull rod assembly, a roll system assembly and other parts, wherein the main parts of the roll system assembly are a bearing seat, a pull rod, a roller, a supporting seat and the like. The upper bearing seat and the lower bearing seat are fixed together through copper nuts by utilizing four pull rods with left and right threads, so that the length of a stress line is shorter. The roll gap adjusting device is used for adjusting the opening degree of the roll, a hydraulic motor drives a pull rod to rotate through a worm-worm gear pair transmission gear pair, and left and right threaded nuts in the upper and lower bearing seats realize symmetrical adjustment of the upper and lower rolls relative to a rolling line through rotation of the pull rod. In order to prevent the roller from tilting, the roller gap adjusting device is provided with a clutch, so that one-side adjustment is facilitated. With the rapid development of new rolling technology and new technology, such as continuous casting and rolling, high-precision rolling, low-temperature rolling, cold control technology, non-grooved rolling and the like, and the increasingly strong market competition has higher requirements on the quality of rod and wire products, the production equipment, the production technology and the production technology are continuously updated and improved, and the short-stress rolling mill is first used. Particularly, with the continuous improvement of the productivity of the rolling line, the mature application of the pore-free rolling technology, the specification of the blank is continuously increased, and the adjustment range of the opening degree of the roller is required to be matched with the blank to be increased, so that the original equipment can not meet the requirements of the new technology, and the guide range of the supporting seat to the bearing seat must meet the requirement of the large opening degree of the roller. At present, only other types can be replaced to realize product rolling, and no improvement and optimization measures for adapting to the requirement of large opening degree are available on the basis of the original short stress rolling mill. Disclosure of Invention The invention provides a method for adjusting large opening degree of a short stress rolling mill, which comprises the steps of screening out a retention parameter, determining a roll gap adjustment precondition according to the retention parameter, designing a large opening degree roll gap adjusting device through the retention parameter and the roll gap adjustment precondition, and adjusting the roll gap opening degree by the large opening degree roll gap adjusting device The technical scheme for realizing the purpose of the invention is as follows: A method for adjusting large opening degree of a short stress rolling mill comprises the following steps: Step one, eliminating parameters which cannot adjust the roll gap change in a short stress rolling mill; Step two, reserving parameters capable of adjusting roll gap change in the short stress rolling mill to obtain reserved parameters; step three, determining a parameter from the reserved parameters as a roll gap adjusting parameter; step four, determining a roll gap adjustment precondition according to the roll gap adjustment parameters; Fifthly, designing a large-opening-degree roll gap adjusting device according to the reserved parameters and roll gap adjusting preconditions. The invention screens out the reserved parameters, determines the roll gap adjustment precondition according to the reserved parameters, designs the large-opening-degree roll gap adjusting device through the reserved parameters and the roll gap adjustment precondition, and can adjust the roll gap opening degree. In one possible implementation, the parameters of step one rejection include: The center of the bearing hole of the upper bearing seat of the short stress rol