CN111185494B - Stretch bending and straightening process of stainless steel cold-rolled strip - Google Patents
Stretch bending and straightening process of stainless steel cold-rolled strip Download PDFInfo
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- CN111185494B CN111185494B CN202010150144.0A CN202010150144A CN111185494B CN 111185494 B CN111185494 B CN 111185494B CN 202010150144 A CN202010150144 A CN 202010150144A CN 111185494 B CN111185494 B CN 111185494B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
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Abstract
The invention provides a stretch bending and straightening process of a stainless steel cold-rolled strip, which utilizes stretch bending and straightening equipment to correct the straightness of the strip by adjusting the tension of a braking S-roller set, changing the inlet angle of a bending unit and the elongation of the strip aiming at the stainless steel cold-rolled strips with different sizes and different hardness; compared with the prior art, the process can meet the technical requirement of the flatness of the stainless steel cold-rolled strip, can effectively eliminate the plate shape defects, improve the plate shape quality and improve the deep processing performance of the product, thereby greatly improving the yield of the product.
Description
Technical Field
The invention relates to a stretch bending and straightening process of a precise stainless steel cold-rolled strip, belonging to the field of production and processing of metal materials.
Background
In recent years, with the rapid development of the national electronic information industry and the infrastructure construction, the rapid development of the metal industry, particularly the development of high-precision stainless steel strips, is driven. In order to achieve the aims of high precision, intellectualization and light weight of electronic products, the electronic manufacturing industry puts higher demands on the quality of high-precision stainless steel strips, and particularly, the index requirements on the aspects of dimensional precision, surface quality and plate type of the precision strips are further increased to a new height.
In the field of electronic information, particularly in the practical application of mobile phones, after stamping, the precise stainless steel strip is used as a core plate or a protective plate and is placed in the mobile phone, the plate type of the precise stainless steel strip is a key influencing factor influencing the stamping and assembling effect of mobile phone parts, and the stainless steel strip cannot meet the use requirement, so that the internal components such as electronic products or mobile phones cannot be normally assembled, the use performance of the electronic products or mobile phones cannot be normally operated, and the service life of the electronic products or mobile phones and the service life of the mobile phones.
The plate shape of the precision stainless steel strip mainly comprises two concepts of plate convexity and flatness. The plate convexity refers to the thickness difference between the middle part and the edge part of the cross section of the strip along the width direction; the straightness refers to the degree of warping, the presence or absence of waves, buckling, and the like of the strip. Common plate type defects include: longitudinal curvature, transverse curvature, sickle curvature, edge waves, middle waves and the like. These problems are mainly caused by the uneven internal stress at each portion in the width direction of the strip during the rolling, annealing, and degreasing processes. Therefore, after the rolling is finished, the finished strip is subjected to plate-type stretch bending straightening treatment by the implementation of the patent, so that the finished strip meets the plate-type requirement of a precise stainless steel belt, and the service performance of the product is exerted to the maximum extent.
Disclosure of Invention
In order to solve the problems, the invention provides a stretch bending and straightening process of a precise stainless steel cold-rolled strip, which is characterized by comprising the following steps: the tension of the uncoiler is set to be 40-50N/mm2The rolling tension is set to be 40-50N/mm2，
1) When the Thickness (TH) of the stainless steel cold-rolled strip is more than or equal to 0.1mm and less than or equal to 0.20mm,
when the hardness HV is 310-340, the inlet gap value of the bending unit is set to-1.8 mm, and the elongation of the strip is set to 0.3% -0.4%;
when the hardness HV is 341 to 370, the inlet gap value of the bending unit is set to-2 mm, and the elongation of the strip is set to 0.35 to 0.45 percent;
when the hardness HV is 371-400, the inlet gap value of the bending unit is set to-2.2 mm, and the elongation of the strip is set to 0.4% -0.5%;
2) when the Thickness (TH) of the stainless steel cold-rolled strip is more than or equal to 0.2mm and less than or equal to 0.30mm,
when the hardness HV is 250-280, the inlet gap value of the bending unit is set to-1.6 mm, and the elongation of the strip is set to 0.28% -0.32%;
when the hardness HV is 281 to 310, the inlet gap value of the bending unit is set to-1.8 mm, and the elongation of the strip is set to 0.28 to 0.32 percent;
when the hardness HV is 311-340, the inlet gap value of the bending unit is set to-1.8 mm, and the elongation of the strip is set to 0.28% -0.32%;
when the hardness HV is 341 to 370, the inlet gap value of the bending unit is set to-2.0 mm, and the elongation of the strip is set to 0.3 to 0.4 percent;
when the hardness HV is 371-400, the inlet gap value of the bending unit is set to-2.2 mm, and the elongation of the strip is set to 0.4% -0.5%.
The invention has the beneficial effects that: the invention provides a stretch bending and straightening process of a stainless steel cold-rolled strip, which is characterized in that twenty three-roller stretch bending and straightening equipment is utilized, a stainless steel cold-rolled strip coil needing stretch bending and straightening is fixed to an uncoiler, an automatic traction device is adopted, and after the stainless steel cold-rolled strip coil is sequentially installed through a braking S-roller set, a bending device and a traction S-roller set, a strip head is fixed to a coiling machine; aiming at stainless steel cold-rolled strips with different sizes and different hardness, the straightness of the strips is corrected by adjusting the tension of a braking S-roller set, changing the inlet angle of a bending unit and the elongation of the strips; compared with the prior art, the process can meet the technical requirement of the flatness of the stainless steel cold-rolled strip, can effectively eliminate the plate shape defects, improve the plate shape quality and improve the deep processing performance of the product, thereby greatly improving the yield of the product.
Drawings
FIG. 1 is a perspective view of a pre-crown and flatness of a withdrawal straightening process;
FIG. 2 is a perspective view of the crown and flatness after the withdrawal straightening process;
FIG. 3 is a pictorial representation of a stainless steel strip prior to a withdrawal straightening process;
FIG. 4 is a pictorial representation of a stainless steel strip after a withdrawal and straightening process;
detailed description of the preferred embodiment 1
A stretch bending and straightening process of a stainless steel cold-rolled strip comprises the following steps:
fixing a stainless steel cold-rolled strip coil with the thickness of 0.15mm and the hardness of 340HV to an uncoiler, and fixing a strip head to a coiling machine after sequentially installing a braking S-roller set, a bending device and a traction S-roller set by adopting an automatic traction device; the tension of the uncoiler is set to be 45N/mm2Setting the tension of the set of brake S-rolls to 172N/mm2The inlet of the bending unit is set to-1.8 mm, the elongation of the strip is set to 0.32%, and the tension of the winder is set to 45N/mm2The treatment speed was set at 65 m/min.
Specific example 2
A stretch bending and straightening process of a stainless steel cold-rolled strip comprises the following steps:
fixing a stainless steel cold-rolled strip coil with the thickness of 0.2mm and the hardness of 280HV to an uncoiler, and sequentially installing the stainless steel cold-rolled strip coil through a braking S-roller set and a bending device by adopting an automatic traction deviceAfter the S roller group is drawn, fixing the belt head to a winding machine; the tension of the uncoiler is set to be 45N/mm2Setting the tension of the set of brake S-rolls to 140N/mm2The inlet of the bending unit is set to-1.6 mm, the elongation of the strip is set to 0.3%, and the tension of the winder is set to 45N/mm2The processing speed was set to 70 m/min.
Claims (1)
1. A stretch bending and straightening process of a precise stainless steel cold-rolled strip is characterized by comprising the following steps: the tension of the uncoiler is set to be 40-50N/mm2The rolling tension is set to be 40-50N/mm2，
1) When the thickness TH of the stainless steel cold-rolled strip is more than or equal to 0.1mm and less than 0.20mm,
when the hardness HV is 310-340, the inlet gap value of the bending unit is set to-1.8 mm, and the elongation of the strip is set to 0.3% -0.4%;
when the hardness HV is 341 to 370, the inlet gap value of the bending unit is set to-2 mm, and the elongation of the strip is set to 0.35 to 0.45 percent;
when the hardness HV is 371-400, the inlet gap value of the bending unit is set to-2.2 mm, and the elongation of the strip is set to 0.4% -0.5%;
2) when the thickness TH of the stainless steel cold-rolled strip is more than or equal to 0.2mm and less than or equal to 0.30mm,
when the hardness HV is 250-280, the inlet gap value of the bending unit is set to-1.6 mm, and the elongation of the strip is set to 0.28% -0.32%;
when the hardness HV is 281 to 310, the inlet gap value of the bending unit is set to-1.8 mm, and the elongation of the strip is set to 0.28 to 0.32 percent;
when the hardness HV is 311-340, the inlet gap value of the bending unit is set to-1.8 mm, and the elongation of the strip is set to 0.28% -0.32%;
when the hardness HV is 341 to 370, the inlet gap value of the bending unit is set to-2.0 mm, and the elongation of the strip is set to 0.3 to 0.4 percent;
when the hardness HV is 371-400, the inlet gap value of the bending unit is set to-2.2 mm, and the elongation of the strip is set to 0.4% -0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150144.0A CN111185494B (en) | 2020-03-06 | 2020-03-06 | Stretch bending and straightening process of stainless steel cold-rolled strip |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150144.0A CN111185494B (en) | 2020-03-06 | 2020-03-06 | Stretch bending and straightening process of stainless steel cold-rolled strip |
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| CN111185494A CN111185494A (en) | 2020-05-22 |
| CN111185494B true CN111185494B (en) | 2021-06-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114749487B (en) * | 2022-03-11 | 2023-10-31 | 山东钢铁集团日照有限公司 | Recoiling tension-straightening method for saving cold-rolled strip steel with yield strength lower than requirement |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0531663A (en) * | 1991-07-26 | 1993-02-09 | Nippon Steel Corp | Treating method for belt-like metallic substance |
| JPH08224617A (en) * | 1995-02-22 | 1996-09-03 | Mitsubishi Heavy Ind Ltd | Tension leveler |
| CN201380216Y (en) * | 2009-04-29 | 2010-01-13 | 北京建莱机电技术有限公司 | Strip stretch bending straightening device |
| CN101716594A (en) * | 2009-12-11 | 2010-06-02 | 永鑫精密材料（无锡）有限公司 | Production process of precise stainless steel band for vehicle sealing pad |
| CN102671939A (en) * | 2012-05-14 | 2012-09-19 | 山西太钢不锈钢股份有限公司 | Production method of 304L precise stainless steel belt |
| CN102886395A (en) * | 2012-10-13 | 2013-01-23 | 山西太钢不锈钢股份有限公司 | Adjustment method for stretching and straightening thin steel strip by 23-roll stretching straightening machine |
| CN103433278A (en) * | 2013-08-13 | 2013-12-11 | 永鑫精密材料（无锡）有限公司 | Production method of low-carbon alloy steel precision cold-rolled strip for LED industry |
| CN106319193A (en) * | 2016-09-30 | 2017-01-11 | 永鑫精密材料（无锡）有限公司 | Low-temperature distressing thermal treatment process for precise cold-rolled extremely-thin stainless steel strip |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862242B (en) * | 2014-03-24 | 2016-05-18 | 无锡宝顺不锈钢有限公司 | Manufacture the production method of accurate 317L stainless steel band capillaceous |
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2020
- 2020-03-06 CN CN202010150144.0A patent/CN111185494B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0531663A (en) * | 1991-07-26 | 1993-02-09 | Nippon Steel Corp | Treating method for belt-like metallic substance |
| JPH08224617A (en) * | 1995-02-22 | 1996-09-03 | Mitsubishi Heavy Ind Ltd | Tension leveler |
| CN201380216Y (en) * | 2009-04-29 | 2010-01-13 | 北京建莱机电技术有限公司 | Strip stretch bending straightening device |
| CN101716594A (en) * | 2009-12-11 | 2010-06-02 | 永鑫精密材料（无锡）有限公司 | Production process of precise stainless steel band for vehicle sealing pad |
| CN102671939A (en) * | 2012-05-14 | 2012-09-19 | 山西太钢不锈钢股份有限公司 | Production method of 304L precise stainless steel belt |
| CN102886395A (en) * | 2012-10-13 | 2013-01-23 | 山西太钢不锈钢股份有限公司 | Adjustment method for stretching and straightening thin steel strip by 23-roll stretching straightening machine |
| CN103433278A (en) * | 2013-08-13 | 2013-12-11 | 永鑫精密材料（无锡）有限公司 | Production method of low-carbon alloy steel precision cold-rolled strip for LED industry |
| CN106319193A (en) * | 2016-09-30 | 2017-01-11 | 永鑫精密材料（无锡）有限公司 | Low-temperature distressing thermal treatment process for precise cold-rolled extremely-thin stainless steel strip |
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