CN-117299781-B - Roller matching method for splitting holes

CN117299781BCN 117299781 BCN117299781 BCN 117299781BCN-117299781-B

Abstract

The invention discloses a roll matching method for cutting holes, which belongs to the technical field of profile steel rolling and solves the technical problem that an upper roll and a lower roll in a current high-speed rotation state are damaged due to mutual collision of cutting edges of the rolls. When the upper roller or the lower roller in the high-speed rotation state is in a channeling state, the first matched roller gap is smaller than the cutting edge gap, the first matched roller gaps of the upper roller and the lower roller are contacted first, so that collision between cutting edges of the upper roller and the lower roller can not occur, and abnormal damage to hole type key positions such as the cutting edges can be avoided.

Inventors

TAN WEI
LIU TI
CHEN CHENG

Assignees

阳春新钢铁有限责任公司

Dates

Publication Date: 20260505
Application Date: 20230831

Claims (2)

1. The method for matching the split holes is characterized in that first matching roll gaps (M) smaller than a cutting edge gap (H) are respectively arranged at two ends of an upper roll (1) and a lower roll (2), and diameters of the two ends of the upper roll (1) and the lower roll (2) are determined according to the first matching roll gaps (M); a roll gap (K) is arranged between the first matched roll gap (M) and the hole pattern (3), and the roll gap (K) is larger than the cutting edge gap (H); the first matched roll gap (M) is 0.5-2mm smaller than the cutting edge gap (H); The first matched roll gap (M) is formed by sequentially connecting at least two gaps with different widths; Under the condition of meeting the design requirement of a normal hole pattern (3), setting at least one section of second matched roll gap (N) smaller than a cutting edge gap (H) at the middle parts of an upper roll (1) and a lower roll (2), and determining the diameters of the upper roll (1) and the lower roll (2) at the second matched roll gap (N) according to the second matched roll gap (N); The second matched roll gap (N) is 0.5-2mm smaller than the cutting edge gap (H); the second matched roll gap (N) is formed by sequentially connecting at least two gaps with different widths.
2. A method for distributing rolls for hole cutting according to claim 1, characterized in that, during the process of rolling, specific values of the first distributing roll gap (M) or the second distributing roll gap (N) at different positions of the upper roll (1) and the lower roll (2) are noted to better guide the production operation.

Description

Roller matching method for splitting holes Technical Field The invention relates to the technical field of section steel rolling, in particular to a roll matching method for splitting holes. Background In the section steel rolling process, as shown in fig. 1, an annular groove which is formed on a roller and is used for processing a rolled piece is called a rolling groove A, a roller ring B is reserved between two adjacent rolling grooves A, an orifice formed on a rolling surface by two rolling grooves A of an upper roller C and a lower roller D is called a hole pattern E, a gap formed by the two roller rings B is called a roller gap F, and the arrangement of the hole pattern and the roller gap on the roller is called a matched roller. The existing roller matching method generally sets the same roller gap value at the two ends and the middle of a set of rollers, so that when encountering a special hole like a cutting hole, as shown in fig. 2, the roller gap F value is equal to or even smaller than the gap of a hole type cutting edge G, namely the cutting edge G on a rolling groove A is higher than a roller ring B, and the defects are mainly shown as follows: In the slitting rolling process, the roll gap setting is smaller, compared with the situation that the gap between the slitting edges is smaller, when the roll shifting occurs due to the defect of a positioning bearing in the rolling process, the upper roll and the lower roll in a high-speed rotation state can be damaged due to the mutual collision of the slitting edges of the roll shifting. Disclosure of Invention The invention aims to solve the technical problems in the prior art, and aims to provide a roller matching method for cutting holes, which can avoid abnormal damage to key positions of holes such as cutting edges. The technical scheme of the invention is that a first matched roll gap smaller than a cutting edge gap is respectively arranged at two ends of an upper roll and a lower roll, and the diameters of the two ends of the upper roll and the lower roll are determined according to the first matched roll gap. As a further improvement, the first mating roll gap is 0.5-2mm smaller than the cutting edge gap. Further, the first matched roll gap is formed by sequentially connecting at least two gaps with different widths. Further, under the condition that the normal hole pattern design requirement is met, at least one section of second matched roll gap smaller than the cutting edge gap is arranged in the middle of the upper roll and the lower roll, and the diameter of the upper roll and the lower roll at the second matched roll gap is determined according to the second matched roll gap. Further, the second matched roll gap is 0.5-2mm smaller than the cutting edge gap. Further, the second matched roll gap is formed by sequentially connecting at least two gaps with different widths. Further, in the process of programming the rolling procedure, specific values of the first matched roll gap or the second matched roll gap at different positions of the upper roll and the lower roll are noted so as to better guide the production operation. Advantageous effects Compared with the prior art, the invention has the advantages that: In the invention, when the upper roller or the lower roller in a high-speed rotation state runs, the first matched roller gap is smaller than the cutting edge gap, and the first matched roller gap of the upper roller and the lower roller is contacted first, so that the cutting edges of the upper roller and the lower roller cannot collide with each other, and abnormal damage to the key positions of the holes such as the cutting edge can be avoided. Drawings FIG. 1 is a schematic view of the structure of an upper roller and a lower roller in the prior art; FIG. 2 is a schematic view of the structure of the cutting edges of the upper and lower rolls in the prior art; FIG. 3 is a schematic view of a first mating roll gap according to the present invention; fig. 4 is an enlarged view of P in fig. 3; fig. 5 is a schematic structural view of a second matched roll gap in the present invention. Wherein, the roll gap comprises a 1-upper roll, a 2-lower roll, a 3-hole type, a 4-cutting edge, an A-rolling groove, a B-roll collar, a C-upper roll, a D-lower roll, an E-hole type, an F-roll gap, a G-cutting edge, an H-cutting edge gap, a K-roll gap, an M-first matched roll gap and an N-second matched roll gap. Detailed Description The invention will be further described with reference to specific embodiments in the drawings. Referring to fig. 3-5, a first roller gap M smaller than a cutting edge gap H is respectively disposed at two ends of an upper roller 1 and a lower roller 2, the cutting edge gap H is a gap between two cutting edges 4 of the upper roller 1 and the lower roller 2, and diameters of two ends of the upper roller 1 and the lower roller 2 are determined according to the first roller gap M. A roll gap K is arranged between the first