CN109420794A - Control method for shearing high-strength steel edge crack by combined machine set circle shear - Google Patents
Control method for shearing high-strength steel edge crack by combined machine set circle shear Download PDFInfo
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- CN109420794A CN109420794A CN201710742632.9A CN201710742632A CN109420794A CN 109420794 A CN109420794 A CN 109420794A CN 201710742632 A CN201710742632 A CN 201710742632A CN 109420794 A CN109420794 A CN 109420794A
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- Prior art keywords
- shearing
- strip
- edge
- control method
- strength steel
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- 238000010008 shearing Methods 0.000 title claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 24
- 239000010959 steel Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000010791 quenching Methods 0.000 claims abstract description 6
- 230000000171 quenching effect Effects 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
- B23D33/006—Accessories for shearing machines or shearing devices for obtaining pieces of a predetermined length, e.g. control arrangements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shearing Machines (AREA)
Abstract
The invention relates to a control method for a high-strength steel edge crack sheared by a circle shear of a combined machine set, which comprises the following steps of 1) calibrating the blade clearance and the lap joint quantity of the circle shear according to standard values before the edge shearing of strip steel; 2) enlarging the clearance of the calibrated shear blade by 0.2-0.3mm, leading the strip steel, and then returning the original clearance after leading the strip steel; 3) optimizing shearing parameters; 4) utilizing the deviation-rectifying fine-tuning strip steel to enable the strip steel to be positioned in the middle of the center, and enabling the shearing widths of the two sides to be consistent; 5) the ratio of shearing to quenching of the sheared section is 1: 4-5; 6) the shearing speed is stabilized at 160-170 m/min; 7) after shearing for more than 20 km, the blade gap is enlarged by 0.3-0.35 mm. The control method of the invention improves the edge quality of the rolled edge, and the existing cold rolled product production process flow does not need to increase and reform equipment, so that the edge shearing of the high-strength steel is stably produced.
Description
Technical field
The present invention relates to cold rolling of strip steel shearing process, in particular to a kind of Unit erriger circle shear shearing high-strength steel edge is split
The control method of mouth.
Background technique
Tandem rolling line is in the steel grades such as circle shear shearing Q235, DP, TRIP, steel strip thickness 3.0-4.0mm, width 730-
When 1300mm, outgoing gauge 0.8mm-1.2mm, leads to roll rear quality of edges because the characteristic of steel is hard and crisp breach usually occur existing
As, it is difficult to steady production.So guaranteeing the steady production of unit for a kind of control method of this case study, edge matter is improved
Amount, possesses more market shares, enhances the competitiveness.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of Unit erriger circle shear shearing high-strength steel edge breaches
Control method improves the quality of edges of rolled edge.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of control method of Unit erriger circle shear shearing high-strength steel edge breach, is completed according to the following steps:
1) blade clearance before strip cutting edge by standard value calibration circle shear and amount of lap；
2) strip leader is carried out after 0.2-0.3mm being amplified in the gap of calibrated cutting edge, recalls to original again after strip leader
Gap；The cutting edge that ensures not colliding with when strip leader causes to hurt sword；
3) optimizing shear parameter is as follows:
Raw thickness is 4.0mm, and when outgoing gauge is 1.2mm, blade clearance is 0.93 ± 0.05mm, amount of lap 0.81
±0.05mm；
Raw thickness is 3.5mm, and when outgoing gauge is 0.9mm, blade clearance is 0.72 ± 0.05mm, amount of lap 0.70
±0.05mm；
Raw thickness is 3.0mm, and when outgoing gauge is 0.8mm, blade clearance is 0.67 ± 0.05mm, amount of lap 0.67
±0.05mm；
4) so that strip is in middle position using correction fine tuning strip, keep both sides shearing width consistent；Can to avoid by
It causes edge shearing force inconsistent in uneven thickness and influences shearing quality；
5) cutting rear section and cutting with disconnected ratio of quenching is 1:4-5；
6) shear velocity is stablized in 160-170m/min；
7) after shearing is more than 20 kilometers, 0.3-0.35mm is amplified in blade clearance again.
The high-strength steel yield strength is 1370MPa or more, and tensile strength is 1620MPa or more.
Compared with prior art, the beneficial effects of the present invention are:
Control method of the invention improves the quality of edges of rolled edge, does not have to increase in the existing cold-rolled products technological process of production
Add, reforming equipment, makes the cutting edge steady production of high-strength steel.
Specific embodiment
Below with reference to embodiment, the present invention is further described:
The present invention will be described in detail for following embodiment.These embodiments be only to preferred embodiment of the invention into
Row description, does not limit the scope of the present invention.
Embodiment 1
A kind of control method of Unit erriger circle shear shearing high-strength steel edge breach, is completed according to the following steps:
1) blade clearance before strip cutting edge by standard value calibration circle shear and amount of lap；
2) strip leader is carried out after 0.2mm being amplified in the gap of calibrated cutting edge, recalls to former gap again after strip leader；
3) optimizing shear parameter is as follows:
Raw thickness is 4.0mm, when outgoing gauge is 1.2mm, blade clearance 0.93mm, amount of lap 0.81mm；
Raw thickness is 3.5mm, when outgoing gauge is 0.9mm, blade clearance 0.72mm, amount of lap 0.70mm；
Raw thickness is 3.0mm, when outgoing gauge is 0.8mm, blade clearance 0.67mm, amount of lap 0.67mm；
4) so that strip is in middle position using correction fine tuning strip, keep both sides shearing width consistent；
5) cutting rear section and cutting with disconnected ratio of quenching is 1:4；
6) shear velocity is stablized in 160m/min；
7) after shearing is more than 20 kilometers, 0.3mm is amplified in blade clearance again.
Embodiment 2
A kind of control method of Unit erriger circle shear shearing high-strength steel edge breach, is completed according to the following steps:
1) blade clearance before strip cutting edge by standard value calibration circle shear and amount of lap；
2) strip leader is carried out after 0.3mm being amplified in the gap of calibrated cutting edge, recalls to former gap again after strip leader；
The cutting edge that ensures not colliding with when strip leader causes to hurt sword；
3) optimizing shear parameter is as follows:
Raw thickness is 4.0mm, when outgoing gauge is 1.2mm, blade clearance 0.98mm, amount of lap 0.86mm；
Raw thickness is 3.5mm, when outgoing gauge is 0.9mm, blade clearance 0.77mm, amount of lap 0.75mm；
Raw thickness is 3.0mm, when outgoing gauge is 0.8mm, blade clearance 0.72mm, amount of lap 0.72mm；
4) so that strip is in middle position using correction fine tuning strip, keep both sides shearing width consistent；Can to avoid by
It causes edge shearing force inconsistent in uneven thickness and influences shearing quality；
5) cutting rear section and cutting with disconnected ratio of quenching is 1:4；
6) shear velocity is stablized in 165m/min；
7) after shearing is more than 20 kilometers, 0.3mm is amplified in blade clearance again.
Embodiment 3
A kind of control method of Unit erriger circle shear shearing high-strength steel edge breach, is completed according to the following steps:
1) blade clearance before strip cutting edge by standard value calibration circle shear and amount of lap；
2) strip leader is carried out after 0.2mm being amplified in the gap of calibrated cutting edge, recalls to former gap again after strip leader；
The cutting edge that ensures not colliding with when strip leader causes to hurt sword；
3) optimizing shear parameter is as follows:
Raw thickness is 4.0mm, when outgoing gauge is 1.2mm, blade clearance 0.9mm, amount of lap 0.78mm；
Raw thickness is 3.5mm, when outgoing gauge is 0.9mm, blade clearance 0.69mm, amount of lap 0.67mm；
Raw thickness is 3.0mm, when outgoing gauge is 0.8mm, blade clearance 0.64mm, amount of lap 0.64mm；
4) so that strip is in middle position using correction fine tuning strip, keep both sides shearing width consistent；Can to avoid by
It causes edge shearing force inconsistent in uneven thickness and influences shearing quality；
5) cutting rear section and cutting with disconnected ratio of quenching is 1:5；
6) shear velocity is stablized in 170m/min；
7) after shearing is more than 20 kilometers, 0.35mm is amplified in blade clearance again.
Claims (2)
1. a kind of control method of Unit erriger circle shear shearing high-strength steel edge breach, which is characterized in that complete according to the following steps
At:
1) blade clearance before strip cutting edge by standard value calibration circle shear and amount of lap；
2) strip leader is carried out after 0.2-0.3mm being amplified in the gap of calibrated cutting edge, recalls to former gap again after strip leader；
3) optimizing shear parameter: raw thickness 3.0-4.0mm, when outgoing gauge is 0.8-1.2mm, blade clearance 0.67-
0.93 ± 0.05mm, amount of lap are 0.67-0.81 ± 0.05mm；
4) so that strip is in middle position using correction fine tuning strip, keep both sides shearing width consistent；
5) cutting rear section and cutting with disconnected ratio of quenching is 1:4-5；
6) shear velocity is stablized in 160-170m/min；
7) after shearing is more than 20 kilometers, 0.3-0.35mm is amplified in blade clearance again.
2. a kind of control method of Unit erriger circle shear shearing high-strength steel edge breach according to claim 1, special
Sign is that the high-strength steel yield strength is 1370MPa or more, and tensile strength is 1620MPa or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742632.9A CN109420794A (en) | 2017-08-25 | 2017-08-25 | Control method for shearing high-strength steel edge crack by combined machine set circle shear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710742632.9A CN109420794A (en) | 2017-08-25 | 2017-08-25 | Control method for shearing high-strength steel edge crack by combined machine set circle shear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109420794A true CN109420794A (en) | 2019-03-05 |
Family
ID=65499622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710742632.9A Pending CN109420794A (en) | 2017-08-25 | 2017-08-25 | Control method for shearing high-strength steel edge crack by combined machine set circle shear |
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| Country | Link |
|---|---|
| CN (1) | CN109420794A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113843281A (en) * | 2021-08-31 | 2021-12-28 | 天津市新天钢冷轧薄板有限公司 | Control method for improving quality of edge of hard-rolled coil |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020194871A1 (en) * | 2001-04-10 | 2002-12-26 | Simon Jonathan S. | Control for an I.S. machine |
| CN201614414U (en) * | 2009-12-31 | 2010-10-27 | 上海欧达电气成套设备工程有限公司 | Pinch roll forced centering device |
| CN102722104A (en) * | 2012-06-29 | 2012-10-10 | 宝山钢铁股份有限公司 | Method for controlling acid-washing and edge-shearing quality of high-strength steel |
| CN103357944A (en) * | 2013-07-10 | 2013-10-23 | 河北钢铁股份有限公司邯郸分公司 | IF steel hot rolled materials acid rolling trimming quality control method |
| CN105983669A (en) * | 2016-07-06 | 2016-10-05 | 武汉科技大学 | Synchronous hydraulic shear for continuous casting square billet |
| CN106552963A (en) * | 2015-09-30 | 2017-04-05 | 宝山钢铁股份有限公司 | A kind of strip steel trimming cut burr control method suitable for rewinding unit circle shear |
-
2017
- 2017-08-25 CN CN201710742632.9A patent/CN109420794A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020194871A1 (en) * | 2001-04-10 | 2002-12-26 | Simon Jonathan S. | Control for an I.S. machine |
| CN201614414U (en) * | 2009-12-31 | 2010-10-27 | 上海欧达电气成套设备工程有限公司 | Pinch roll forced centering device |
| CN102722104A (en) * | 2012-06-29 | 2012-10-10 | 宝山钢铁股份有限公司 | Method for controlling acid-washing and edge-shearing quality of high-strength steel |
| CN103357944A (en) * | 2013-07-10 | 2013-10-23 | 河北钢铁股份有限公司邯郸分公司 | IF steel hot rolled materials acid rolling trimming quality control method |
| CN106552963A (en) * | 2015-09-30 | 2017-04-05 | 宝山钢铁股份有限公司 | A kind of strip steel trimming cut burr control method suitable for rewinding unit circle shear |
| CN105983669A (en) * | 2016-07-06 | 2016-10-05 | 武汉科技大学 | Synchronous hydraulic shear for continuous casting square billet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113843281A (en) * | 2021-08-31 | 2021-12-28 | 天津市新天钢冷轧薄板有限公司 | Control method for improving quality of edge of hard-rolled coil |
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Application publication date: 20190305 |