CN102500657B - Method for correcting welding deformation of large plate-type structural piece - Google Patents
Method for correcting welding deformation of large plate-type structural piece Download PDFInfo
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- CN102500657B CN102500657B CN201110341039.6A CN201110341039A CN102500657B CN 102500657 B CN102500657 B CN 102500657B CN 201110341039 A CN201110341039 A CN 201110341039A CN 102500657 B CN102500657 B CN 102500657B
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000003466 welding Methods 0.000 title claims abstract description 22
- 239000000729 antidote Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000368 destabilizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
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Abstract
The invention relates to a method for correcting the welding deformation of a large plate-type structural piece, which comprises the following steps that: the deformation quantity of a work piece is measured, and the maximum deformation position is marked; a certain number of process cushion blocks are arranged below the work piece with a certain spacing, and are adjusted to different heights; the top ends of all the process cushion blocks are connected, so that the work piece produces a certain anti-deformation quantity; the work piece is heated in a furnace, so that the work piece has preset plastic deformation; and the method is adopted for correcting the welding deformation of the large plate-type structural piece. The method for correcting the welding deformation of the large plate-type structural piece has the beneficial effects that: 1. the work piece is heated in the furnace and an anti-deformation method is also adopted, so that the correction precision requirements of the large work piece can be met, and the quality is stable; 2. the heat treatment equipment of a factory is utilized, no large hydraulic machinery needs to be purchased, so that investment is saved; and 3. the safety is high, and the operation level requirements on personnel can be reduced.
Description
Technical field
The present invention relates to the antidote of plate-type structural piece in plant equipment, particularly a kind of antidote of large-scale plate-type structural piece welding deformation.
Background technology
The existing component of machine of taking welding method to manufacture, its welding deformation cannot be avoided.As larger in the welding deformation of macrotype platform shape parts, the height of its straightening quality will directly affect processing and the assembly precision of product, and the became uneven of platform panel will affect stability and the security of overturn platform.
The welding deformation of small-scale structure part can adopt the direct swaging of hydraulic press to correct at present, but hydraulic press has certain requirement to the appearance and size of workpiece; For larger-size structural member, normal by manually adopting flame carry out the method for local heat or press weight at workpiece deformation larger part, then utilize large-tonnage bridge crane to hang steel wire rope and draw the method for workpiece to reach the object of rectification.Hydraulic press rectification effect is good, and the used time is short, but equipment investment is large and workpiece is had the dimensions to restriction; On workpiece, ballast utilizes large-tonnage bridge crane extension steel wire rope to draw the method security of workpiece not high; The artificial method that adopts flame to carry out local heat rectification to workpiece is more conventional, but operator's technical ability and experience are had relatively high expectations, and not necessarily desirable to the larger large-scale plate-type structural piece effect of structural rigidity.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of antidote of large-scale plate-type structural piece welding deformation, can reach good rectification effect, and processing ease.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of antidote of large-scale plate-type structural piece welding deformation, comprises the following steps:
One, the deflection of measuring workpieces, marks maximum distortion position;
Two, below workpiece, place at a certain distance the technique cushion block of some, and adjust it to different height dimensions, the top line by each technique cushion block is so that workpiece produces certain anti-deformation;
Three, workpiece arcuate surface is placed on technique cushion block down, guarantees that maximum distortion place fully contacts with middle technique cushion block;
Four, on workpiece perk face, place ballast weight, after the placement location of weight should guarantee that workpiece one end and mid portion fully contact with technique cushion block, the other end is perk shape;
Between the position that workpiece one end contacts with technique cushion block, be provided with technique lacing wire, by floor, be welded to connect workpiece and technique cushion block, guarantee can only slide to perk end after workpiece adds thermal deformation;
Five, carry out heat temperature raising in stove, make workpiece produce default plastic deformation;
By said method, correct large-scale plate-type structural piece welding deformation.
In the scheme of optimizing, in step 2, described anti-deformation is the springback capacity of the practical distortion amount+workpiece of the workpiece that records.
In the scheme of optimizing, in step 4, described weight weight is 0.5-10t.
In the scheme of optimizing, in step 5, in stove, heating-up temperature is 580-640 ℃.
The antidote of a kind of large-scale plate-type structural piece welding deformation provided by the invention, has following beneficial effect:
1, in stove, heat and in conjunction with reversible deformation method, can meet the rectification required precision of large-scale dimension workpiece, and steady quality.
2, utilize factory's current thermal treatment equipment, without buying large hydraulic machinery, save investment.
3, safe, can reduce the operant level requirement to personnel.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the front view of workpiece in the present invention.
Fig. 2 is the upward view of workpiece in the present invention.
Fig. 3 is overall structure schematic diagram in the present invention.
The specific embodiment
In Fig. 1-Fig. 3, a kind of antidote of large-scale plate-type structural piece welding deformation, comprises the following steps:
One, the deflection of measuring workpieces 1, marks maximum distortion position;
Two, below workpiece 1, place at a certain distance the technique cushion block 2 of some, and adjust it to different height dimensions, the top line by each technique cushion block 2 is so that workpiece 1 produces certain anti-deformation;
Three, workpiece 1 arcuate surface is placed on technique cushion block 2 down, guarantees that maximum distortion place fully contacts with middle technique cushion block 2;
Four, on workpiece 1 perk face, place ballast weight 4, after the placement location of weight 4 should guarantee that workpiece 1 one end and mid portion fully contact with technique cushion block 2, the other end is perk shape;
Five, carry out heat temperature raising in stove, make workpiece 1 produce default plastic deformation;
By said method, correct large-scale plate-type structural piece welding deformation.
In the scheme of optimizing, in step 2, described anti-deformation is the springback capacity of the practical distortion amount+workpiece 1 of the workpiece 1 that records.
In the scheme of optimizing, in step 4, described weight 4 weight are 0.5-10t.
In the scheme of optimizing, in step 4, one end that workpiece 1 contacts with technique cushion block 2 is provided with technique lacing wire.
In the scheme of optimizing, in step 5, in stove, heating-up temperature is 580-640 ℃.
Embodiment:
Below, by the specific embodiment, technical scheme of the present invention is described in further detail.
The rectification of certain hydraulic platform of take is example, workpiece 1 is that platform is the main bearing carrier of hydraulic platform, maximum appearance and size (length * wide * height) is 11000 * 3500 * 115mm, for adopting sequential welding weld seam to paste the steel plate (postwelding is machined into t30mm) of weldering one monoblock t35mm on intensive hollow rectangle steel frame, be typical " plate-type structural piece ".As shown in Figure 1, Figure 2.After processing, the required precision of whole plane is flatness≤1.5mm, the platform above and below depth of parallelism≤0.5mm, and the thickness of upper plane steel plate (t30mm) is poor≤3mm.If above-mentioned requirements can not be guaranteed, bring destabilizing factor will to installation and the use of whole platform, in the time of also can causing its upset work, contact laminating with other mating surface not tight.Therefore platform requires postwelding to correct distortion, flatness < 3mm.Therefore adopt method of the present invention, correct according to the following steps successively the rear reprocessing of distortion:
The deformation of A, check measurement workpiece 1, and on workpiece 1, mark Deformable crutch dotted line.
B. on the desk-top flatcar 3 of heat-treatment furnace, (1500 ~ 2000mm) places 5 technique cushion blocks 2 at a certain distance, its length should be substantially and workpiece wide.Conventionally more intensive technique cushion block 2 has better effect, more level and smooth during workpiece 1 reversible deformation, considers that cost performance has adopted 5 technique cushion blocks in this example.
Utilize adjusting backing plate school adjusts the height dimension H(of each technique cushion block to see H1 ~ 5 in Fig. 3), make the line of technique cushion block upper surface high in the middle of forming, the curve that both sides are low.Guarantee the workpiece springback capacity of the anti-deformation B=A+5 ~ 15mm of end.Conventionally workpiece " thinner " the springback capacity that stays should be larger, this example is got 10mm.
C. after technique cushion block school is adjusted and to be finished, workpiece 1 upset arcuate surface is placed on desk-top flatcar 3 down, its arch minimum point is fully contacted and relatively fixing with middle cushion block.As shown in Figure 3.
D. on platform perk face, place ballast weight (0.5 ~ 10t), deflection one end that during lifting, weight center of gravity can be suitable, after guaranteeing that workpiece 1 one end and mid portion fully contact with technique cushion block 2, the other end is perk shape, in Fig. 3, in this example, weight 4 is from left to right followed successively by 5-8t, 3-5t, 3-5t, 3-5t, 8-10t.One end that workpiece contacts with technique cushion block 2 arranges technique lacing wire, by floor, is welded to connect workpiece and technique cushion block 2, guarantees can only slide to perk end after workpiece adds thermal deformation.
E. carry out heat temperature raising in stove, heating-up temperature should guarantee that workpiece can produce certain plastic deformation and can not destroy again its raw-material supply of material state, for example: the state of former normalizing plate or modified plate.In this example, to select heating-up temperature be 580 ~ 640 ℃, be incubated 2 hours, and heating-cooling speed≤100 ℃/h, reach after the temperature retention time of regulation, workpiece answer furnace cooling to whole instrument all indicate≤300 ℃ after, the air cooling of can coming out of the stove is to room temperature.
F. after work-piece cools is come out of the stove, bracing wire checks surface integral unevenness≤3 ~ 4mm, after the mode of the outer flame heating of local uneven place's employing stove is proofreaied and correct, reaches processing request.
Claims (4)
1. an antidote for large-scale plate-type structural piece welding deformation, is characterized in that comprising the following steps:
One, the deflection of measuring workpieces (1), marks maximum distortion position;
Two, in workpiece (1) below, place at a certain distance the technique cushion block (2) of some, and adjust it to different height dimensions, the top line by each technique cushion block (2) is so that workpiece (1) produces certain anti-deformation;
Three, workpiece (1) arcuate surface is placed on to technique cushion block (2) down above, guarantees that maximum distortion place fully contacts with middle technique cushion block (2);
Four, on workpiece (1) perk face, place ballast weight (4), after the placement location of weight (4) should guarantee that workpiece (1) one end and mid portion fully contact with technique cushion block (2), the other end is perk shape; Between the position that workpiece (1) one end contacts with technique cushion block (2), be provided with technique lacing wire, by floor, be welded to connect workpiece and technique cushion block (2), guarantee can only slide to perk end after workpiece adds thermal deformation;
Five, carry out heat temperature raising in stove, make workpiece (1) produce default plastic deformation;
By said method, correct large-scale plate-type structural piece welding deformation.
2. the antidote of a kind of large-scale plate-type structural piece welding deformation according to claim 1, is characterized in that: in step 2, described anti-deformation is the springback capacity of the practical distortion amount+workpiece (1) of the workpiece (1) that records.
3. the antidote of a kind of large-scale plate-type structural piece welding deformation according to claim 1, is characterized in that: in step 4, described weight (4) weight is 0.5-10t.
4. the antidote of a kind of large-scale plate-type structural piece welding deformation according to claim 1, is characterized in that: in step 5, in stove, heating-up temperature is 580-640 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110341039.6A CN102500657B (en) | 2011-11-02 | 2011-11-02 | Method for correcting welding deformation of large plate-type structural piece |
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| CN201110341039.6A CN102500657B (en) | 2011-11-02 | 2011-11-02 | Method for correcting welding deformation of large plate-type structural piece |
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| CN102500657A CN102500657A (en) | 2012-06-20 |
| CN102500657B true CN102500657B (en) | 2014-01-29 |
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| CN102974660B (en) * | 2012-12-05 | 2015-05-27 | 南京钢铁股份有限公司 | Thick steel plate planishing technology |
| CN104226731B (en) * | 2013-06-13 | 2016-08-10 | 宝山钢铁股份有限公司 | The method of heavy plate mill working roll backplate straightening |
| CN103357723B (en) * | 2013-07-22 | 2015-06-24 | 中联重科股份有限公司渭南分公司 | Correction method and device for radian out-of-tolerance deformation of rolling formed parts |
| CN104084451B (en) * | 2014-06-30 | 2016-05-11 | 无锡市威海达机械制造有限公司 | The method that machine components plastic deformation is corrected |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246099C (en) * | 2000-05-29 | 2006-03-22 | 美蓓亚株式会社 | Distortion correcting method and device for plane body |
| CN101733305A (en) * | 2008-11-17 | 2010-06-16 | 鞍钢股份有限公司 | A method of straightening steel plates |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5235150A (en) * | 1975-09-12 | 1977-03-17 | Kubota Ltd | Apparatus for correcting wrap of plate body |
| JPS5273164A (en) * | 1975-12-17 | 1977-06-18 | Anritsu Electric Co Ltd | System for warp automatically correcting at many points |
| KR20080013248A (en) * | 2006-08-08 | 2008-02-13 | 주식회사 포스코 | Steel plate straightening device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246099C (en) * | 2000-05-29 | 2006-03-22 | 美蓓亚株式会社 | Distortion correcting method and device for plane body |
| CN101733305A (en) * | 2008-11-17 | 2010-06-16 | 鞍钢股份有限公司 | A method of straightening steel plates |
Non-Patent Citations (2)
| Title |
|---|
| JP特开昭52-35150 1977.03.17 |
| JP特开昭52-73164 1977.06.18 |
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