CN102029503B - Method for forming right cone stainless steel tank - Google Patents
Method for forming right cone stainless steel tank Download PDFInfo
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- CN102029503B CN102029503B CN200910024193A CN200910024193A CN102029503B CN 102029503 B CN102029503 B CN 102029503B CN 200910024193 A CN200910024193 A CN 200910024193A CN 200910024193 A CN200910024193 A CN 200910024193A CN 102029503 B CN102029503 B CN 102029503B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 34
- 239000010935 stainless steel Substances 0.000 title claims abstract description 33
- 238000003466 welding Methods 0.000 claims abstract description 40
- 239000011257 shell material Substances 0.000 claims description 96
- 238000005520 cutting process Methods 0.000 claims description 19
- 238000000465 moulding Methods 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000002161 passivation Methods 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000006049 ring expansion reaction Methods 0.000 claims description 2
- 238000010112 shell-mould casting Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000007796 conventional method Methods 0.000 abstract 1
- 241000238097 Callinectes sapidus Species 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention relates to a method for forming a right cone stainless steel tank. The method for forming the right cone stainless steel tank comprises the following steps of: 1) feeding a barrel section plate; 2) forming the barrel section; and 3) forming the tank. The invention provides the method for forming the right cone stainless steel tank. Compared with the conventional method for manufacturing the right cone, the forming method has the advantage of greatly improving the feeding accuracy of the barrel section plate, the barrel section pairing quality and the final welding quality.
Description
Technical field
The present invention relates to a kind of stainless steel railway tank car manufacturing approach, relate in particular to a kind of forming method of shell ring formula right cone stainless steel tank car tank body.
Background technology
Stainless steel railway tank car tube structure basically all is a cylindrical shape at present.Because the requirement of railway speed raising, the railway tank car upgrades to the 70t level by the 60t level; Stainless steel tank car shipment medium is precious liquid relatively mostly in addition, and the user has relatively high expectations to the through unloading rate of tank body, so tank structure is improved to the right cone form, has improved the through unloading rate of medium.This also is first this low-alloy steel right cone of stainless steel tank body to be used on the railway tank car.This stainless steel right cone tank body and traditional round rod structure manufacturing process have very big difference.
Column structure stainless steel tank body moulding master operation: after shell ring plate splicing is accomplished, line, groove is opened system, cylinder, the shell ring longitudinal seam welding, the cylindrical shell group is to, welding, and the end socket group is to, welding.This cylindrical tank system fabrication technique can not adapt to the manufacturing of stainless steel right cone structure tank body.
Present stainless steel tank body moulding master operation: the program of at first using the establishment of C language is launched each shell ring of cylindrical shell, according to expanded view plate is carried out blanking, bevel, and cylinder, the shell ring longitudinal seam welding, the cylindrical shell group is to, welding etc.Mainly there is following shortcoming in this manufacturing approach: 1, plate expanded view program adopts cone generatrices as evolute, and after the shell ring moulding, this line is out-of-level, with detail of design a difference is arranged.2, because the right cone non-rotary body, can not directly launch in theory, so the plate unwind adopts and gets a method and programme, cutting stock precision is not high, influences the cylindrical shell group to quality.3, the curve of plate adopts manual method for plasma cutting, and the edges of boards curve quality can't guarantee.4, the curve slope of plate adopts straight line groove power blader limit, hand grinding, and the groove Forming Quality is relatively poor, and bigger to the welding quality influence, the weld seam repair rate is higher.
Summary of the invention
In order to solve the above-mentioned technical problem that exists in the background technology; The invention provides a kind of right cone stainless steel tank body forming method, this forming method is made with present right cone system and is compared, and no matter is from shell ring plate cutting stock precision; Still the body group all improves a lot to the final welding quality to quality.
Technical solution of the present invention is: the invention provides a kind of right cone stainless steel tank body forming method, its special character is: said right cone stainless steel tank body forming method may further comprise the steps:
1) shell ring plate cutting;
2) shell ring moulding;
3) tank body moulding.
Above-mentioned right cone stainless steel tank body forming method also comprises:
4) can seam flaw detection.
Above-mentioned right cone stainless steel tank body forming method also comprises:
5) tank inner surface being carried out acid wash passivation handles.
Above-mentioned steps 1) may further comprise the steps:
1.1) the shell ring expansion, its concrete implementation is: use three-dimensional modeling that cylindrical shell is carried out moulding, according to the cylindrical shell moulding each shell ring is launched; Obtain the shell ring expanded view; For preventing the influence of welding deformation to cylindrical shell length, cylindrical shell length direction technology is 0～6mm high-volume, and technology high-volume during to the end blanking that is connected with end socket; Be controlled in 4～6mm scope, the value size is chosen according to the cylindrical shell material;
1.2) according to the shell ring expanded view in the step 1) plate is cut, its concrete implementation is: according to shell ring plate expanded view, write cutting process, adopt numerical control plasma cutting machine that plate is carried out curvilinear cut;
1.3) the plate groove is left system, its concrete implementation is: after the plate Numerical control cutting, adopting milling mode is that the groove of curve is opened system to edges of boards.
Above-mentioned steps 2) may further comprise the steps:
2.1) the employing subregion rolls bending method each shell ring is carried out rolling, and the formation cone:
2.2) welding manner that adopts Lincoln weld welds the longitudinal joint of cone.
Above-mentioned steps 2.1) may further comprise the steps:
2.1.1) to shell ring pre-bending;
2.1.2) shell ring is rolled curved, its concrete implementation is: fan-shaped plate is rule as benchmark with shell ring top, bottom bus, and rolling when curved constantly adjustment roll-in line, the roll-in line is overlapped all the time with the bus of fan-shaped blank;
2.1.3) to the shell ring set round, its concrete implementation is: shell ring is transferred to the longitudinal joint position, rolls curved 1-2 circle, make whole circle curvature uniformity, removal load gradually then makes workpiece correct under the load reducing gradually, repeatedly rolls curved and set round.
Above-mentioned steps 3) may further comprise the steps:
3.1) tube section group is right;
3.2) the tank body group is right;
3.3) the tank body welding.
Above-mentioned steps 3.1) concrete implementation is: successively to half cylindrical shell promptly the tube section organize right, the numbering of press shell ring, first that the small end group of end socket and first shell ring is right; With the big end of first shell ring and the small end of second shell ring, it is right that the small end of the big end of second shell ring and the 3rd shell ring is organized, the group to the time; Guaranteeing the bottom; Under the situation of top bus alignment, the unfitness of butt joint of control weld seam is not more than 1.5mm, and group is not more than 2mm to the gap.
Above-mentioned steps 3.2) concrete implementation is: will organize changes on the canister accomplishing the tube section, being positioned over respectively, rotates canister, and adjustment tube section top bus is bottom, and the bottom bus of guaranteeing two sections is at straight line, and group becomes a cylindrical shell to two sections.
Above-mentioned steps 3.3) concrete implementation is: the welding manner of Lincoln weld is adopted in the welding of circular seams of tank body, 35 ° of opening one side grooves, internally girth welding earlier; And then carry out outer circumferential weld weld seam back chipping, weld.
Advantage of the present invention is:
1, qualification rate improves greatly behind the seam inspection.The present invention can guarantee effectively that through above these forming steps the cylindrical shell group is no more than 1.5mm, organizes the gap less than 2mm unfitness of butt joint; Qualification rate improves greatly behind the seam inspection;
2, welding efficiency is high.The present invention adopts the welding manner of longitudinal joint in the stainless steel tank body seam, interior circumferential weld employing Lincoln weld, opening one side groove; Outer vertical, outer circumferential weld groove adopts back chipping to handle, and improves 30% than two-sided bevel welding efficient.
3, acid wash passivation efficient obviously improves.Adopting tank body forming method provided by the present invention, is to adopt spraying method to carry out acid wash passivation tank body, and under the condition of ensuring the quality of products, than traditional soaking and washing, efficient has improved 50%.
Description of drawings
Fig. 1 is the tank body splicing scheme sketch map of method provided by the present invention.
The specific embodiment
The invention provides a kind of right cone stainless steel tank body forming method, this forming method may further comprise the steps:
1, shell ring plate cutting.
1.1 shell ring launches: use three-dimensional modeling that cylindrical shell is carried out moulding; According to cylindrical shell splicing scheme each shell ring is launched; For preventing the influence of welding deformation to cylindrical shell length, cylindrical shell length direction technology is 0～6mm high-volume, an end that is connected with end socket is considered the release of end socket stress; Circumferential direction technology high-volume generally is controlled in 4～6mm scope.The value size is chosen according to the cylindrical shell material, and general 304 stainless steels get the small value, and the 316L welding deformation is got big value more greatly.
1.2 Numerical control cutting: according to shell ring plate expanded view, programming adopts numerical control plasma cutting machine (POWERMAX16505.5mx14m) that plate is carried out curvilinear cut.Point to cylindrical shell bottom, top bus place during cutting clearly marks.The numbering of plate is transplanted before the blanking, the numbering of transplanting must be consistent with the numbering of the program of being compiled of numerical control plasma cutting machine, and the plate that does not have to number is forbidden blanking.During blanking, the wide tolerance 0 of plate～+ 1 is to being numbered high-volume 4mm of 1 shell ring small end technology, cutting.
1.3 groove is opened system: after the plate Numerical control cutting; Edges of boards are that the special-purpose curve slope machine (CHP-12) of stainless steel is adopted in curve slope processing, and this device has adopted milling mode, in the time of finished edge; Can advance automatically along panel edges; Metal removal rate is high, need not people's pushing hands during work and holds up, and has changed the situation that traditional curve slope machine needs people's pushing hands to hold up.The milling amount and the height of adjustment curve slope machine, the edges of boards after cutting is accomplished to digital controlling plasma carry out groove processing, and 35 ° of root face 5mm of bevel angle machine back polishing oxide skin and burr.
2, shell ring moulding.
2.1 cone rolling: because each shell ring is the right cone structure, can not directly once rolling success on spheronizator, adopt subregion to roll bending method each shell ring is carried out rolling.The process of rolling is divided into pre-bending, rolls curved, three steps completion of set round.During pre-bending, make special-purpose pressure head tire and eliminate in edges of boards upstream end and the residual straight portion down of the port of export; Roll when curved, as benchmark fan-shaped plate rule, and constantly adjust the roll-in line when curved rolling, the roll-in line is overlapped with the bus of fan-shaped blank all the time with top, bottom bus; During set round, shell ring is transferred to the longitudinal joint position, rolls curved 1-2 circle, make whole circle curvature uniformity, removal load gradually then makes workpiece correct under the load reducing gradually, repeatedly rolls curved and set round.Through pre-bending, roll three steps of curved, set round and guaranteed the cone manufacturing quality.
2.2 longitudinal seam welding: the welding manner of Lincoln weld, opening one side groove are adopted in welding.
3, tank body moulding.
3.1 tube section group is right: it is right to carry out the cylindrical shell group according to tank body splicing scheme, successively to half cylindrical shell promptly the tube section organize right, the numbering of pressing shell ring; Earlier that the small end group of end socket and first shell ring is right, with the big end of first shell ring and the small end of second shell ring, it is right that the small end of the big end of second shell ring and the 3rd shell ring is organized; Group to the time, guaranteeing the bottom, under the situation of top bus alignment; The unfitness of butt joint of control weld seam is not more than 1.5mm, and group is not more than 2mm to the gap.Particularly; Be earlier that the small end group of end socket and first shell ring is right; Small end group with the big end of first shell ring and second shell ring is right successively then ... And the like the group to accomplishing a tube section; Group to the time the continuous position of adjustment shell ring, guarantee top, the alignment of bottom bus of each shell ring, the control group is to unfitness of butt joint and gap.
3.2 the tank body group is right.To organize accomplishing the tube section, big end relatively, being positioned over two covers respectively changes on the canisters, rotates canister, adjustment tube section top bus is bottom, the bottom bus of guaranteeing two sections is at straight line, group becomes a cylindrical shell to two sections.The unfitness of butt joint of control weld seam is not more than 1.5mm, and group is not more than 2mm to the gap.
3.3 the tank body welding: the welding manner of Lincoln weld is adopted in the welding of circular seams of tank body, opening one side groove, internally girth welding earlier; And then carry out outer circumferential weld weld seam back chipping, weld.Weld width 18 ± 3mm, reinforcement 0～3mm.This welding manner is different to preventing the bigger problem of stainless steel welding back distortion, and most of manufacturers adopt plasma, handgrip welding.During welding, at first to cleaning around the inside weld, welding; And then carry out outer circumferential weld weld seam back chipping, polishing, welding.Referring to Fig. 1, the visible cylindrical shell of this figure is made up of two straight conical cylinder sections, and totally six shell ring assembly weldings form.
4, can seam flaw detection.Cylindrical shell is vertical, circumferential weld adopts the X ray method to detect a flaw.
5, acid wash passivation.Inner surface carried out the acid wash passivation processing after tank body completed.At first tank body is carried out alkali cleaning, pickling.After qualified, carry out Passivation Treatment, the passivating film quality uses the Bluepoint test to test.
GH70A type ethylene glycol railway tank car, tank body is assembled into right cone structure cylindrical shell, and the tank body material is 0Cr18Ni9 (304), cylindrical shell outside diameter 2850mm, end diameter 2800mm, thickness of slab 10mm.Length of tank 11300 ± 14mm, tank body welding point counterpart unfitness of butt joint should be not more than 1.5mm, and group is not more than 2mm to the gap, and weld seam Non-Destructive Testing rule criterion of acceptability is the III level of JB/T4730.2 regulation; The tank inner surface acid wash passivation is handled, and the inspection of passivating film is undertaken by the Bluepoint method, and it is defective manifesting Bluepoint in 30 seconds.
Claims (7)
1. right cone stainless steel tank body forming method, it is characterized in that: said right cone stainless steel tank body forming method may further comprise the steps:
1) shell ring plate cutting;
1.1) the shell ring expansion, its concrete implementation is: use three-dimensional modeling that cylindrical shell is carried out moulding, according to the cylindrical shell moulding each shell ring is launched; Obtain the shell ring expanded view; For preventing the influence of welding deformation to cylindrical shell length, cylindrical shell length direction technology is 0～6mm high-volume, to the end technology that is connected with end socket high-volume; Be controlled in 4～6mm scope, the value size is chosen according to the cylindrical shell material;
1.2) according to the shell ring expanded view in the step 1) plate is cut, its concrete implementation is: according to shell ring plate expanded view, write cutting process, adopt numerical control plasma cutting machine that plate is carried out curvilinear cut;
1.3) the plate groove is left system, its concrete implementation is: after the plate Numerical control cutting, adopting milling mode is that the groove of curve is opened system to edges of boards;
2) shell ring moulding;
2.1) the employing subregion rolls bending method each shell ring is carried out rolling, and the formation cone;
2.1.1) to shell ring pre-bending;
2.1.2) shell ring is rolled curved, its concrete implementation is: fan-shaped plate is rule as benchmark with shell ring napex, bottom bus, and rolling when curved constantly adjustment roll-in line, the roll-in line is overlapped all the time with the bus of fan-shaped blank;
2.1.3) to the shell ring set round, its concrete implementation is: shell ring is transferred to the longitudinal joint position, rolls curved 1-2 circle, make whole circle curvature uniformity, removal load gradually then makes workpiece correct under the load reducing gradually, repeatedly rolls curved and set round;
2.2) welding manner that adopts Lincoln weld welds the longitudinal joint of cone;
3) tank body moulding.
2. right cone stainless steel tank body forming method according to claim 1 is characterized in that: said right cone stainless steel tank body forming method also comprises:
4) can seam flaw detection.
3. right cone stainless steel tank body forming method according to claim 2 is characterized in that: said right cone stainless steel tank body forming method also comprises:
5) tank inner surface being carried out acid wash passivation handles.
4. right cone stainless steel tank body forming method according to claim 3, it is characterized in that: said step 3) may further comprise the steps:
3.1) tube section group is right;
3.2) the tank body group is right;
3.3) the tank body welding.
5. right cone stainless steel tank body forming method according to claim 4 is characterized in that: concrete implementation said step 3.1) is: successively to half cylindrical shell promptly the tube section organize right, the numbering of pressing shell ring; Earlier that the small end group of end socket and first shell ring is right; With the big end of first shell ring and the small end of second shell ring, it is right that the small end of the big end of second shell ring and the 3rd shell ring is organized, the group to the time; Guaranteeing the bottom; Under the situation of top bus alignment, the unfitness of butt joint of control weld seam is not more than 1.5mm, and group is not more than 2mm to the gap.
6. right cone stainless steel tank body forming method according to claim 5; It is characterized in that: concrete implementation said step 3.2) is: will organize accomplishing the tube section, and hold relatively greatly, being positioned over respectively changes on the canister; Rotate canister; Adjustment tube section top bus is bottom, and the bottom bus of guaranteeing two sections is at straight line, and group becomes a cylindrical shell to two sections.
7. right cone stainless steel tank body forming method according to claim 6 is characterized in that: concrete implementation said step 3.3) is: the welding manner of Lincoln weld is adopted in the welding of circular seams of tank body, opening one side groove, internally girth welding earlier; And then carry out outer circumferential weld weld seam back chipping, weld.
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| CN200910024193A CN102029503B (en) | 2009-09-30 | 2009-09-30 | Method for forming right cone stainless steel tank |
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| CN200910024193A CN102029503B (en) | 2009-09-30 | 2009-09-30 | Method for forming right cone stainless steel tank |
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| CN102029503B true CN102029503B (en) | 2012-09-05 |
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| CN102029503A (en) | 2011-04-27 |
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