CN102974660B - Thick steel plate planishing technology - Google Patents
Thick steel plate planishing technology Download PDFInfo
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- CN102974660B CN102974660B CN201210515392.6A CN201210515392A CN102974660B CN 102974660 B CN102974660 B CN 102974660B CN 201210515392 A CN201210515392 A CN 201210515392A CN 102974660 B CN102974660 B CN 102974660B
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Abstract
The invention discloses a thick steel plate planishing technology, which comprises the following steps of: (1) respectively manufacturing five steel cushion blocks of 6*80*100mm, five steel cushion blocks of 8*80*100mm, five steel cushion blocks of 10*80*100mm and five steel cushion blocks of 12*80*100mm; (2) by aiming at the steel type of the same intensity grade, measuring according to the thickness, and recording the unevenness of the steel plate before the steel plate is planished; (3) repeatedly cushioning two cushion blocks with the same thickness or two cushion blocks with different thicknesses on the upper surface and the lower surface of the steel plate until the unevenness of the planished steel plate conforms to the standard, and recording the total thickness and the maximum pressure value of the cushion blocks on the upper surface and the lower surface of the steel plate; (4) according to the total thickness of the cushion blocks and the maximum pressure value, carrying out planishing processing ton the steel plate which conforms to the unevenness of the steel plate in step (2); and (5) after the steel plate is planished, measuring the unevenness of the steel plate again. According to the thick steel plate planishing technology disclosed by the invention, different planishiing pressures can be givenrealized on the basis of different steel types and different original plate shapes, and the planished steel plate conforms to the corresponding product standard.
Description
Technical field
The present invention relates to the pressing technique of a kind of steel plate of field of metallurgy, the pressing technique of the steel plate of steel plate unevenness can be reduced specifically.
Background technology
In field of metallurgy, part steel plate (thickness >=30mm) is after hot rolling, heat are rectified and cooled, the unevenness of steel plate still can exceed products standards, directly affects user and uses, and the underproof steel plate of this unevenness needs to flatten process through follow-up cold state.But in the pressing operational process of craft of prior art medium plate for different steel grade and different original plate shape without specifically detailed operating procedure, cannot according to different steel grade, the given different applanation pressure of different original plate shape, roller flatteningl roller levelling effect is bad, and steel plate does not still meet corresponding product standard after flattening.
Summary of the invention
Technical problem to be solved by this invention is, for the shortcoming that above prior art exists, a kind of pressing technique of steel plate is proposed, can according to different steel grade, different original plate shape, given different applanation pressure, makes steel plate meet corresponding product standard after flattening.
The technical scheme that the present invention solves above technical problem is:
A pressing technique for steel plate, uses press to carry out pressing process to steel plate, specifically carries out according to the following steps:
(i) thick × wide × long each 5 pieces of the steel cushion block being respectively 6 × 80 × 100mm, 8 × 80 × 100mm, 10 × 80 × 100mm and 12 × 80 × 100mm is made;
(ii) for the steel grade of same intensity rank, by thickness measure also record pressing front spring unevenness, unevenness unit is mm/2m;
(iii) repeatedly optional step (i) in the identical cushion block of two pieces of thickness or the different cushion block pad of two pieces of thickness need flatten the upper and lower surface of steel plate of process, press is used to carry out pressing process to steel plate, until steel plate unevenness meets standard after pressure, the maximum pressure value that the gross thickness of steel plate upper and lower surface cushion block when steel plate unevenness meets standard after record pressure and press use;
(iv) according to step (iii) in cushion block gross thickness select step (i) in the identical cushion block of two pieces of thickness or the different cushion block pad of two pieces of thickness need flatten the upper and lower surface of steel plate of process, use press according to step (iii) in maximum pressure value pressings carried out to the steel plate meeting step steel plate unevenness (ii) process;
(v) again measure the unevenness of steel plate after flattening, if the unevenness of steel plate is undesirable, then repeat step (ii) ~ (v), if the unevenness of steel plate meets the requirements, then terminate.
The invention has the beneficial effects as follows: the present invention can according to different steel grade, different original plate shape, given different applanation pressure, make steel plate meet corresponding product standard after flattening.It is simple that the present invention flattens technological operation, can according to different steel grade, different original plate shape, given different applanation pressure, steel plate is made to meet corresponding product standard after flattening, improve the efficiency of roller flatteningl roller levelling, 8 pieces/class can be increased to by 5 pieces/class, improve the pressing qualification rate of steel plate, 98% can be increased to by 90%.
Detailed description of the invention
Embodiment 1
The present embodiment is to one block of Q345B steel plate, and thick × wide × length is 60 × 2200 × 9000mm, carries out pressing process, specifically carries out according to the following steps:
(i) thick × wide × long each 5 pieces of the steel cushion block being respectively 6 × 80 × 100mm, 8 × 80 × 100mm, 10 × 80 × 100mm and 12 × 80 × 100mm is made;
(ii) measuring the unevenness flattening front spring is 10mm/2m;
(iii) repeatedly optional step (i) in the identical cushion block of two pieces of thickness or the different cushion block pad of two pieces of thickness need flatten the upper and lower surface of steel plate of process, press is used to carry out pressing process to steel plate, until steel plate unevenness meets standard after pressure, the gross thickness of steel plate upper and lower surface cushion block when steel plate unevenness meets standard after record pressure is the maximum pressure that 20mm and press use is 28MN;
(iv) select the steel cushion block of 8 × 80 × 100mm and 12 × 80 × 100mm to pad upper and lower surface at Q345B steel plate (60 × 2200 × 9000mm) respectively, use press to carry out to Q345B steel plate (60 × 2200 × 9000mm) pressings according to maximum pressure 28MN and process;
(v) again measure the unevenness of steel plate after flattening, the unevenness measuring this steel plate after pressure is 7mm/2m, qualified (national standard requirement≤8mm/2m).
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (2)
1. a pressing technique for steel plate, uses press to carry out pressing process to steel plate, it is characterized in that: specifically carry out according to the following steps:
(i) thick × wide × long each 5 pieces of the steel cushion block being respectively 6 × 80 × 100mm, 8 × 80 × 100mm, 10 × 80 × 100mm and 12 × 80 × 100mm is made;
(ii) for the steel grade of same intensity rank, by thickness measure also record pressing front spring unevenness, unevenness unit is mm/2m;
(iii) repeatedly optional step (i) in the identical cushion block of two pieces of thickness or the different cushion block pad of two pieces of thickness need flatten the upper and lower surface of steel plate of process, press is used to carry out pressing process to steel plate, until steel plate unevenness meets standard after pressure, the maximum pressure value that the gross thickness of steel plate upper and lower surface cushion block when steel plate unevenness meets standard after record pressure and press use;
(iv) according to step (iii) in cushion block gross thickness select step (i) in the identical cushion block of two pieces of thickness or the different cushion block pad of two pieces of thickness need flatten the upper and lower surface of steel plate of process, use press according to step (iii) in maximum pressure value pressings carried out to the steel plate meeting step steel plate unevenness (ii) process;
(v) again measure the unevenness of steel plate after flattening, if the unevenness of steel plate is undesirable, then repeat step (ii) ~ (v), if the unevenness of steel plate meets the requirements, then terminate.
2. the pressing technique of steel plate as claimed in claim 1, is characterized in that: described steel plate thickness >=30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210515392.6A CN102974660B (en) | 2012-12-05 | 2012-12-05 | Thick steel plate planishing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210515392.6A CN102974660B (en) | 2012-12-05 | 2012-12-05 | Thick steel plate planishing technology |
Publications (2)
| Publication Number | Publication Date |
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| CN102974660A CN102974660A (en) | 2013-03-20 |
| CN102974660B true CN102974660B (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210515392.6A Active CN102974660B (en) | 2012-12-05 | 2012-12-05 | Thick steel plate planishing technology |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63180326A (en) * | 1987-01-22 | 1988-07-25 | Nkk Corp | Hot straightening method for thick plate |
| JPH0211223A (en) * | 1988-06-29 | 1990-01-16 | Sumitomo Metal Ind Ltd | Cold straightening method for two-layer clad steel sheet |
| JP4289480B2 (en) * | 2003-03-24 | 2009-07-01 | 株式会社神戸製鋼所 | Straightening method to obtain steel plate with good shape with little variation in residual stress |
| CN1970181B (en) * | 2007-01-19 | 2011-05-18 | 宝钛集团有限公司 | Metal sheet hot-rectification processing method |
| CN101733305A (en) * | 2008-11-17 | 2010-06-16 | 鞍钢股份有限公司 | Method for straightening steel plate |
| CN201394595Y (en) * | 2009-03-19 | 2010-02-03 | 宝山钢铁股份有限公司 | Wide-thick plate finishing straightening machine |
| CN102121085B (en) * | 2011-01-20 | 2012-08-29 | 西北工业大学 | Method for preventing hot working warpage and deformation of large titanium alloy isothermal precise thin web plate forge pieces |
| CN102218405B (en) * | 2011-03-31 | 2013-10-16 | 广州齐达材料科技有限公司 | Method for correcting and measuring plate-shaped parts |
| CN102500657B (en) * | 2011-11-02 | 2014-01-29 | 宜昌江峡船用机械有限责任公司 | Method for correcting welding deformation of large plate-type structural piece |
| CN102601166A (en) * | 2012-03-05 | 2012-07-25 | 上海海事大学 | Straightening method based on support vector machine for workpiece deformation |
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- 2012-12-05 CN CN201210515392.6A patent/CN102974660B/en active Active
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