A method for adjusting the roll gap of a straightener for straightening round steel

Abstract

The present application provides a straightening machine roll gap adjusting method for straightening round steel. Since the diameter of the round steel is larger, the hardness is higher, the carbon content is higher, and the hardness is also higher, the specified straightening parameters are performed on the round steel with different diameters and the round steel with different carbon contents, so as to achieve the purposes of fast straightening, improving straightening precision and efficiency.

Description

Technical Field

[0001] This invention relates to the field of straightening machine technology, specifically a method for adjusting the roller gap of a straightening machine for straightening round steel. Background Technology

[0002] Round steel bars are formed through a series of processes including melting, rolling, and surface treatment. Round steel bars are typically 12 meters long. During production, temperature variations and uneven stress can cause the round steel bars to bend, especially those with diameters between φ50mm and φ130mm, where the bending is more pronounced. Therefore, straightening of the round steel bars is necessary.

[0003] The commonly used equipment for straightening round steel bars is the seven-roll straightener. Each straightening operation requires adjustment of the roll gap. Because there is no standardized method for roll gap adjustment, continuous adjustments are necessary during straightening, resulting in low roll gap adjustment efficiency. Summary of the Invention

[0004] To address the technical problems in the background art, this invention discloses a method for adjusting the roll gap of a straightening machine for straightening round steel.

[0005] This invention provides a method for adjusting the roll gap of a straightening machine for straightening round steel, comprising the following steps:

[0006] S1. The upper rollers are sequentially configured as a first upper roller, a second upper roller, and a third upper roller; the lower rollers are sequentially configured as a first lower roller paired with the first upper roller, a second lower roller paired with the second upper roller, a third lower roller paired with the third upper roller, and a fourth lower roller.

[0007] In the initial state, the first lower roller, the second lower roller, the third lower roller, and the fourth lower roller are located at the bottommost position;

[0008] Drive the first upper roller to rise and fall, so that the gap between the first upper roller and the first lower roller is 2mm smaller than the diameter of the round steel.

[0009] S2. Drive the second lower roller to rise, and let the rising distance be a, in mm, where a∈[2,10];

[0010] S3. Drive the second upper roller to rise and fall, so that the gap between the second upper roller and the second lower roller is adjusted to be 1mm smaller than the diameter of the round steel.

[0011] S4. Drive the third upper roller to rise and fall, so that the gap between the third upper roller and the third lower roller is adjusted to be 2mm smaller than the diameter of the round steel.

[0012] S5. Let the center line be b. The first upper roller, the second upper roller, the third upper roller, the first lower roller, the second lower roller, the third lower roller, and the fourth lower roller are all symmetrical with respect to b.

[0013] The angle between the first upper roller, the first lower roller and b is set as β1, the angle between the second upper roller and b is set as β2, and the angle between the third upper roller, the third lower roller and b is set as β3.

[0014] Adjust the angles between the first upper roller, the second upper roller, the third upper roller, the first lower roller, and the third lower roller and b.

[0015] β1∈[27.5°, 32°], β1-β2=0.5°, β1-β3=0.5°;

[0016] S6. The straightening speed of the straightening machine is set as s, with the unit being m / min. Adjust the speed of the straightening machine so that s∈[30, 60].

[0017] In step S2, the diameter of the round steel is set as d, in mm; the carbon content of the round steel is set as e.

[0018] When d∈[50,60], if e≤0.25%, a=6; if e∈(0.25%,0.6%), a=8; if e≥0.6%, a=10;

[0019] When d∈(60,70], if e≤0.25%, a=5; if e∈(0.25%,0.6%), a=7; if e≥0.6%, a=9;

[0020] When d∈(70,90], if e≤0.25%, a=4; if e∈(0.25%,0.6%), a=6; if e≥0.6%, a=8;

[0021] When d∈(90,110], if e≤0.25%, a=3; if e∈(0.25%,0.6%), a=5; if e≥0.6%, a=5;

[0022] When d∈(110,130], if e≤0.25%, a=2; if e∈(0.25%,0.6%), a=4; if e≥0.6%, a=7.

[0023] In step S5, when d∈[50,60], β1=27.5°;

[0024] When d∈(60,70], β1=29°; when d∈(70,90], β1=30.5°; when d∈(90,110], β1=31.5°; when d∈(110,130], β1=32°.

[0025] In step S6, when d∈[50,60], s=60; when d∈(60,70], s=50; when d∈(70,80], s=50; when d∈(80,90], s=40; when d∈(90,110], s=35; when d∈(110,130], s=30.

[0026] The beneficial effects of this invention are: since the larger the diameter of the round steel, the higher the hardness, and the higher the carbon content, the higher the hardness, the more precise the straightening parameters can be specified for round steel of different diameters and with different carbon contents, thereby achieving the purpose of rapid straightening and improving straightening accuracy and efficiency. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] In the diagram: 11, first upper roller; 12, second upper roller; 13, third upper roller; 21, first lower roller; 22, second lower roller; 23, third lower roller; 24, fourth lower roller. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0031] The upper rollers are sequentially configured as a first upper roller 11, a second upper roller 12, and a third upper roller 13; the lower rollers are sequentially configured as a first lower roller 21 paired with the first upper roller 11, a second lower roller 22 paired with the second upper roller 12, a third lower roller 23 paired with the third upper roller 13, and a fourth lower roller 24.

[0032] In the initial state, the first lower roller 21, the second lower roller 22, the third lower roller 23, and the fourth lower roller 24 are located at the lowest position;

[0033] The diameter of the round steel bar is denoted as d, and the unit is mm;

[0034] The straightening speed of the straightening machine is set as s, and the unit is m / min;

[0035] The angle between the first upper roller 11, the first lower roller 21 and b is set as β1, the angle between the second upper roller 12 and b is set as β2, and the angle between the third upper roller 13, the third lower roller 23 and b is set as β3.

[0036] Let the center line be b. The first upper roller 11, the second upper roller 12, the third upper roller 13, the first lower roller 21, the second lower roller 22, the third lower roller 23, and the fourth lower roller 24 are all symmetrical with respect to b.

[0037] The distance the second upper roller 12 rises (i.e., the amount of reverse bending) is denoted as a, in mm;

[0038] Let the carbon content of the round steel be e.

[0039] This invention discloses a method for adjusting the roll gap of a straightening machine for straightening round steel bars; comprising the following steps:

[0040] S1. Drive the first upper roller 11 to rise and fall, so that the gap between the first upper roller 11 and the first lower roller 21 is 2mm smaller than the diameter of the round steel.

[0041] S2. Drive the second lower roller 22 upward, such that a∈[2,10]; see the table below for details:

[0042]

[0043] S3. Drive the second upper roller 12 to rise and fall, so that the gap between the second upper roller 12 and the second lower roller 22 is adjusted to be 1mm smaller than the diameter of the round steel.

[0044] S4. Drive the third upper roller 13 to rise and fall, so that the gap between the third upper roller 13 and the third lower roller 23 is adjusted to be 2mm smaller than the diameter of the round steel.

[0045] S5. Adjust the angles between the first upper roller 11, the second upper roller 12, the third upper roller 13, the first lower roller 21, and the third lower roller 23 and b, β1∈[27.5°, 32°], β1-β2=0.5°, β1-β3=0.5°; refer to the table below for details:

[0046]

[0047] S6. The straightening speed of the straightening machine is set as s, with units of m / min. Adjust the speed of the straightening machine so that s∈[30, 60]; refer to the table below for details:

[0048] d∈[50,60] 60 d∈(60,70] 50 d∈(70,80] 50 d∈(80,90] 40 d∈(90,110] 35 d∈(110,130] 30

[0049] The beneficial effects of this invention are: since the larger the diameter of the round steel, the higher the hardness, and the higher the carbon content, the higher the hardness, the more precise the straightening parameters can be specified for round steel of different diameters and with different carbon contents, thereby achieving the purpose of rapid straightening and improving straightening accuracy and efficiency.

[0050] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for adjusting the roll gap of a straightening machine for straightening round steel, characterized in that, Includes the following steps: S1. The upper rollers are sequentially configured as a first upper roller (11), a second upper roller (12), and a third upper roller (13); the lower rollers are sequentially configured as a first lower roller (21) paired with the first upper roller (11), a second lower roller (22) paired with the second upper roller (12), a third lower roller (23) paired with the third upper roller (13), and a fourth lower roller (24). In the initial state, the first lower roller (21), the second lower roller (22), the third lower roller (23), and the fourth lower roller (24) are located at the lowest position; Drive the first upper roller (11) to rise and fall, so that the gap between the first upper roller (11) and the first lower roller (21) is 2mm smaller than the diameter of the round steel. S2. Drive the second lower roller (22) to rise, and let the rising distance be a, in mm, where a∈[2,10]; S3. Drive the second upper roller (12) to rise and fall, so that the gap between the second upper roller (12) and the second lower roller (22) is adjusted to be 1mm smaller than the diameter of the round steel. S4. Drive the third upper roller (13) to rise and fall, so that the gap between the third upper roller (13) and the third lower roller (23) is adjusted to be 2mm smaller than the diameter of the round steel. S5. Let the center line be b. The first upper roller (11), the second upper roller (12), the third upper roller (13), the first lower roller (21), the second lower roller (22), the third lower roller (23), and the fourth lower roller (24) are all symmetrical with respect to b. The angle between the first upper roller (11), the first lower roller (21) and b is set to β1, the angle between the second upper roller (12) and b is set to β2, and the angle between the third upper roller (13), the third lower roller (23) and b is set to β3. Adjust the angles between the first upper roller (11), the second upper roller (12), the third upper roller (13), the first lower roller (21), and the third lower roller (23) and b, β1∈[27.5°, 32°], β1-β2=0.5°, β1-β3=0.5°; S6. The straightening speed of the straightening machine is set as s, with the unit being m / min. Adjust the speed of the straightening machine so that s∈[30, 60]. In step S2, the diameter of the round steel is set as d, in mm; the carbon content of the round steel is set as e. When d∈[50,60], if e≤0.25%, a=6; if e∈(0.25%,0.6%), a=8; if e≥0.6%, a=10; When d∈(60,70], if e≤0.25%, a=5; if e∈(0.25%,0.6%), a=7; if e≥0.6%, a=9; When d∈(70,90], if e≤0.25%, a=4; if e∈(0.25%,0.6%), a=6; if e≥0.6%, a=8; When d∈(90,110], if e≤0.25%, a=3; if e∈(0.25%,0.6%), a=5; if e≥0.6%, a=5. When d∈(110,130], if e≤0.25%, a=2; if e∈(0.25%,0.6%), a=4; if e≥0.6%, a=7.

2. The method for adjusting the roll gap of a straightening machine for straightening round steel according to claim 1, characterized in that: In step S5, when d∈[50,60], β1=27.5°; When d∈(60,70], β1=29°; when d∈(70,90], β1=30.5°; when d∈(90,110], β1=31.5°; when d∈(110,130], β1=32°.

3. The method for adjusting the roll gap of a straightening machine for straightening round steel according to claim 2, characterized in that: In step S6, when d∈[50,60], s=60; When d∈(60,70], s=50; when d∈(70,80], s=50; when d∈(80,90], s=40; when d∈(90,110], s=35; when d∈(110,130], s=30.

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