CN102139441B - Method for leveling super-thick steel plate - Google Patents
Method for leveling super-thick steel plate Download PDFInfo
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- CN102139441B CN102139441B CN 201110076693 CN201110076693A CN102139441B CN 102139441 B CN102139441 B CN 102139441B CN 201110076693 CN201110076693 CN 201110076693 CN 201110076693 A CN201110076693 A CN 201110076693A CN 102139441 B CN102139441 B CN 102139441B
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- steel plate
- trapezoidal groove
- welding
- convex surface
- leveling
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 90
- 239000010959 steel Substances 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 53
- 238000005452 bending Methods 0.000 claims abstract description 8
- 238000003754 machining Methods 0.000 abstract 4
- 230000008033 biological extinction Effects 0.000 abstract 2
- 239000010410 layer Substances 0.000 abstract 1
- 239000002356 single layer Substances 0.000 abstract 1
- 238000005496 tempering Methods 0.000 abstract 1
- 238000009499 grossing Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 229910000926 A-3 tool steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a method for leveling a super-thick steel plate in the technical field of mechanical machining processes, which comprises the following steps of: machining parallel trapezoid grooves on a convex vertex on one side of the convex of the steel plate subjected to bending deflection and both sides of the convex vertex; arranging a run-on plate at one end of each corresponding trapezoid groove additionally, and arranging an arc extinction plate at the other end of each trapezoid groove additionally; performing submerged-arc welding by using an automatic arc-submerging welder from one end of the run-on plate to one end of the arc extinction plate along the corresponding trapezoid groove on the steel plate; performing single-layer or multi-layer welding according to the deformation condition of the steel plate until the steel plate is leveled; and after the welding is finished, tempering the steel plate at the temperature of between 550 and 670 DEG C to eliminate internal stress. By the method, the super-thick steel plate of which the thickness is between 200 and 600 millimeters can be leveled; and the method can be suitable for leveling the super-thick steel plate wit a large area, so the leveling problem of the thick steel plate subjected to the bending deflection is solved effectively, the cost of steel plate blanks and machining cost caused by oversized machining allowance are reduced effectively, and economic benefits are improved.
Description
Technical field
The present invention relates to a kind of steel plate flattening method, belong to the mechanical processing technique technical field.
Background technology
In the heavy-duty machinery industry; the working plate on the forging machine tool for example; often can use super thick steel plate; its thickness is more than the 200mm; steel plate is inner after rolling to exist larger stress; if the out-of-flatness of storage place position is easy to make steel plate to occur bending and deformation, directly have influence on the allowance of steel plate blank, increased steel plate blank dimension and processing cost.At present steel plate flattening method commonly used has: the one, add certain weight at the convex side of workpiece deformation, advancing stove is warmed to about 700 ℃ and smooths, the difficult point of the method is that the numerical value of reversal deformation is difficult to control, the bad assurance of temperature retention time and production capacity had relatively high expectations; The 2nd, to smooth at ten thousand tons of hydraulic presses, the shortcoming of the method is higher to equipment requirement, is difficult to when steel plate is larger realize.
Summary of the invention
The purpose of this invention is to provide a kind of steel plate leveling method for thickness 200-600mm, can overcome the defective of prior art, effectively solve the smoothing problem after the steel plate flexural deformation, reduce steel plate blank cost and the excessive processing cost of bringing of allowance, increase economic efficiency.
The object of the present invention is achieved like this: a kind of steel plate leveling method comprises the steps:
1) in convex surface summit and the both sides, convex surface summit of steel plate convex surface one side that occurs bending and deformation, the trapezoidal groove that processing parallels;
2) end at corresponding trapezoidal groove installs run-on tab additional, and the other end installs arc extinguishing board additional;
3) one end carries out submerged arc welding to arc extinguishing board one end along trapezoidal groove from run-on tab on steel plate with automatic submerged arc welding machine; Carry out one or more layers welding depending on the steel plate deformed situation, until steel plate is leveling;
4) after welding is finished, steel plate is made temper between 550 ℃-670 ℃, to eliminate internal stress.
Utilize method of the present invention, can be with the steel plate smoothing of thickness 200-600mm, when submerged-arc welding, electric arc burns under welding flux layer and welds, its welding quality stable, welding productivity is high, few without arc light and flue dust, steel plate local melting in the trapezoidal groove, and with the fusing welding wire be connected as a single entity, when the metal material of commissure cools off, produce powerful shrinkage stress, make the steel plate local plastic deformation, thereby be forced to smoothing, compared with prior art, the present invention need not to adopt ten thousand t hydraulic press, during it is processed applicable to smoothing of the large ultra-thick steel plates of area, has effectively solved the smoothing problem after the steel plate flexural deformation, effectively reduce the excessive processing cost of bringing of steel plate blank cost and allowance, improved economic benefit.
Be further to guarantee the steady quality of weld, solder side can with the steel plate good combination, described trapezoidal groove is isosceles trapezoid, trapezoidal groove go to the bottom and waist between angle be 65 ± 5, the upper base width of trapezoidal groove is 3-10mm.Above-mentioned parameter can guarantee that the welding wire of melting can be combined well with the steel plate of trapezoidal groove bottom and both sides.
Have enough large fusion penetration during for the assurance welding, in order to guarantee just can make under not too large pressure steel plate to be smoothed smoothly, the height of described trapezoidal groove is (1:4)～(1:8) with the ratio of steel plate thickness.
For reaching the smoothing effect, can use as little as possible welding wire and solder flux simultaneously, the spacing of described adjacent trapezoidal groove is (1:3)～(1:10) with the ratio of the radius of curvature of steel plate bending.
When carrying out submerged-arc welding, preferably begin welding from the trapezoidal groove on convex surface summit first, and then the symmetrical trapezoidal groove of both sides, convex surface summit that welds simultaneously.Can guarantee like this both sides, convex surface summit energy uniform stressed, the smoothing better effects if.
Description of drawings
Structural representation when Fig. 1 is ultra-thick steel plates flexural deformation.
Fig. 2 is the partial enlarged drawing of A among Fig. 1.
The specific embodiment
Working plate on the forging machine tool, material are the 35# steel, and the steel plate nominal dimension is 7350 * 2200 * 320mm, and the thickness direction deflection is 30mm, has surpassed allowance 15mm.As shown in Figure 1, the working plate blank produces flexural deformation, first in steel plate convex surface summit and both sides, convex surface summit, process three trapezoidal grooves that parallel 1, trapezoidal groove 1 is isosceles trapezoid, trapezoidal groove 1 go to the bottom and waist between angle α be 65, allow ± 5 deviation, the width of the upper base 2 of trapezoidal groove is 10mm, and the height of trapezoidal groove is 40mm; Behind the fluting, steel plate is placed in the plane, and the weight about convex surface placement 2T, then the end at trapezoidal groove 1 installs run-on tab additional, and the other end installs arc extinguishing board additional; One end carries out submerged arc welding to arc extinguishing board one end along trapezoidal groove 1 from run-on tab on steel plate with automatic submerged arc welding machine at last; Trapezoidal groove 1 from the convex surface summit begins welding first, and then the symmetrical trapezoidal groove of both sides, convex surface summit that welds simultaneously, welding should be carried out layer by layer, behind welding one deck, deflection to steel plate is measured, and can proceed the second layer, the 3rd layer of welding depending on the deformation of steel plate, until steel plate is smoothed fully, removal run-on tab and arc extinguishing board after welding is finished carry out the destressing temper with steel plate at 550 ℃ at last.
A kind of steel plate, material are the A3 steel, steel plate thickness 200mm, the curved buckling deformation of this steel plate, arc curvature radius are 1.5m, and deflection is 50mm, need smooth processing, during smoothing, first in steel plate convex surface summit and both sides, convex surface summit, process altogether 5 trapezoidal grooves that parallel, trapezoidal groove is isosceles trapezoid, trapezoidal groove go to the bottom and waist between angle be 65, allow ± 5 deviation, the upper base width of trapezoidal groove is 3mm, and the height of trapezoidal groove is 30mm; The spacing of adjacent trapezoidal groove is 50cm, and the spacing of adjacent trapezoidal groove is preferably (1:3)～(1:10) with the ratio of the radius of curvature of arc warpage, but value 1/3,1/5,1/10; Behind the fluting, steel plate is placed in the plane, then the end at trapezoidal groove installs run-on tab additional, and the other end installs arc extinguishing board additional; One end carries out submerged arc welding to arc extinguishing board one end along trapezoidal groove from run-on tab on steel plate with automatic submerged arc welding machine at last; Trapezoidal groove from the convex surface summit begins welding first, and then the symmetrical trapezoidal groove of both sides, convex surface summit that welds simultaneously, welding is carried out layer by layer, behind welding one deck, deflection to steel plate is measured, and proceeds the second layer, the 3rd layer of welding depending on the deformation of steel plate, until steel plate is smoothed fully, removal run-on tab and arc extinguishing board after welding is finished carry out the destressing temper with steel plate at 670 ℃ at last.
Embodiment 3
A kind of steel plate, material are the A3 steel, steel plate thickness 200mm, this buckling deformation, deflection are 20mm, need smooth processing, during smoothing, in steel plate convex surface summit and both sides, convex surface summit, process altogether 3 trapezoidal grooves that parallel first, trapezoidal groove is isosceles trapezoid, trapezoidal groove go to the bottom and waist between angle be 65, allow ± 5 deviation, the upper base width of trapezoidal groove is 5mm, and the height of trapezoidal groove is 50mm; The spacing of adjacent trapezoidal groove is 75cm; Behind the fluting, steel plate is placed in the plane, then the end at trapezoidal groove installs run-on tab additional, and the other end installs arc extinguishing board additional; One end carries out submerged arc welding to arc extinguishing board one end along trapezoidal groove from run-on tab on steel plate with automatic submerged arc welding machine at last; Trapezoidal groove from the convex surface summit begins welding first, and then the symmetrical trapezoidal groove of both sides, convex surface summit that welds simultaneously, welding is carried out layer by layer, behind welding one deck, deflection to steel plate is measured, and proceeds the second layer, the 3rd layer of welding depending on the deformation of steel plate, until steel plate is smoothed fully, removal run-on tab and arc extinguishing board after welding is finished carry out the destressing temper with steel plate at 600 ℃ at last.
During submerged arc welding, the solder flux that needs to adopt should be corresponding with the material of steel plate with welding wire, and the corresponding relation of part material and welding wire, solder flux is as shown in table 1.
Table 1
In a word, when ultra-thick steel plates was smoothed, the quantity of trapezoidal groove can be defined as according to the width of plate one or multi-channel, and the steel plate temperature is preferably between 550 ℃-670 ℃, and the upper base width of trapezoidal groove is preferably 3-10mm; The height of trapezoidal groove is preferably (1:4)～(1:8) with the ratio of steel plate thickness; The spacing of adjacent trapezoidal groove is preferably (1:3)～(1:10) with the ratio of the radius of curvature of steel plate bending.
When carrying out submerged-arc welding, also not only be confined to first to begin welding from the trapezoidal groove on convex surface summit, can be first begin welding from the trapezoidal groove of both sides, the trapezoidal groove at place, convex surface summit welds again; During welding, the trapezoidal groove of both sides, convex surface summit can also weld one by one and be not limited to symmetry and weld simultaneously.When carrying out submerged-arc welding, can avoid trapezoidal groove at the steel plate convex surface and shelve weight, also can not shelve weight.
The present invention is not limited to above-described embodiment; it can smooth the ultra-thick steel plates of 200-600mm; on the basis of technical scheme disclosed by the invention; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection scope of the present invention.
Claims (6)
1. a steel plate leveling method is characterized in that comprising the steps:
1) in convex surface summit and the both sides, convex surface summit of steel plate convex surface one side that occurs bending and deformation, the trapezoidal groove that processing parallels;
2) end at corresponding trapezoidal groove installs run-on tab additional, and the other end installs arc extinguishing board additional;
3) one end carries out submerged arc welding to arc extinguishing board one end along trapezoidal groove from run-on tab on steel plate with automatic submerged arc welding machine; Carry out one or more layers welding depending on the steel plate deformed situation, until steel plate is leveling;
4) after welding is finished, steel plate is made temper between 550 ℃-670 ℃, to eliminate internal stress.
2. a kind of steel plate leveling method according to claim 1, it is characterized in that: described trapezoidal groove is isosceles trapezoid, trapezoidal groove go to the bottom and waist between angle be 65 ° ± 5 °, the upper base width of trapezoidal groove is 3-10mm.
3. a kind of steel plate leveling method according to claim 2 is characterized in that: the height of described trapezoidal groove is (1:4)～(1:8) with the ratio of steel plate thickness.
4. a kind of steel plate leveling method according to claim 3 is characterized in that: the spacing of described adjacent trapezoidal groove is (1:3)～(1:10) with the ratio of the radius of curvature of steel plate bending.
5. the described a kind of steel plate leveling method of any one according to claim 1-4 is characterized in that: when carrying out submerged-arc welding, the trapezoidal groove from the convex surface summit begins welding first, and then is symmetrically welded simultaneously the trapezoidal groove of both sides, convex surface summit.
6. the described a kind of steel plate leveling method of any one is characterized in that: when carrying out submerged-arc welding, avoid trapezoidal groove at the steel plate convex surface and shelve weight according to claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110076693 CN102139441B (en) | 2011-03-29 | 2011-03-29 | Method for leveling super-thick steel plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110076693 CN102139441B (en) | 2011-03-29 | 2011-03-29 | Method for leveling super-thick steel plate |
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| CN102139441A CN102139441A (en) | 2011-08-03 |
| CN102139441B true CN102139441B (en) | 2013-04-17 |
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| CN 201110076693 Expired - Fee Related CN102139441B (en) | 2011-03-29 | 2011-03-29 | Method for leveling super-thick steel plate |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2088137U (en) * | 1991-05-24 | 1991-11-06 | 建设部长沙建筑机械研究所 | Steel forms aligning machine |
| CN2129198Y (en) * | 1992-08-18 | 1993-04-07 | 罗龙元 | Multifunction adjusting machine for hydraulic impact shearing |
| EP0855240A1 (en) * | 1997-01-27 | 1998-07-29 | Nippon Steel Welding Products & Engineering Co., Ltd. | Apparatus and method for one side welding of curved steel plates |
| CN1733460A (en) * | 2004-08-09 | 2006-02-15 | 天津市天锻压力机有限公司 | Mobile gantry type digital control massive plate leveling hydraulic press |
| CN2836947Y (en) * | 2005-10-17 | 2006-11-15 | 比亚迪股份有限公司 | Deformed steel plate leveling device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5121420B2 (en) * | 2007-11-29 | 2013-01-16 | 日本車輌製造株式会社 | Hybrid welding joint |
-
2011
- 2011-03-29 CN CN 201110076693 patent/CN102139441B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2088137U (en) * | 1991-05-24 | 1991-11-06 | 建设部长沙建筑机械研究所 | Steel forms aligning machine |
| CN2129198Y (en) * | 1992-08-18 | 1993-04-07 | 罗龙元 | Multifunction adjusting machine for hydraulic impact shearing |
| EP0855240A1 (en) * | 1997-01-27 | 1998-07-29 | Nippon Steel Welding Products & Engineering Co., Ltd. | Apparatus and method for one side welding of curved steel plates |
| CN1733460A (en) * | 2004-08-09 | 2006-02-15 | 天津市天锻压力机有限公司 | Mobile gantry type digital control massive plate leveling hydraulic press |
| CN2836947Y (en) * | 2005-10-17 | 2006-11-15 | 比亚迪股份有限公司 | Deformed steel plate leveling device |
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| CN102139441A (en) | 2011-08-03 |
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Address after: Yang Road, Yangzhou hi tech Industrial Development Zone, Hanjiang District, Jiangsu city of Yangzhou Province, No. 99 225009 Patentee after: YANGLI GROUP Corp.,Ltd. Address before: 225008 No. 99 middle Yangtze Road, Yangzhou Development Zone, Jiangsu, China Patentee before: JIANGSU YANGLI GROUP Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 |