CN102029503A - Method for forming right cone stainless steel tank - Google Patents
Method for forming right cone stainless steel tank Download PDFInfo
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- CN102029503A CN102029503A CN2009100241933A CN200910024193A CN102029503A CN 102029503 A CN102029503 A CN 102029503A CN 2009100241933 A CN2009100241933 A CN 2009100241933A CN 200910024193 A CN200910024193 A CN 200910024193A CN 102029503 A CN102029503 A CN 102029503A
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- tank body
- shell ring
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- steel tank
- right cone
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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 manufacture method, 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 substantially 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 mostly is somewhat expensive heavy-fluid body greatly 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 finished, 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 manufacture method: 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 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: described 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 specific 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 specific 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 specific 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 specific implementation is: fan-shaped plate is rule as benchmark with shell ring top, bottom bus, 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;
2.1.3) to the shell ring set round, its specific 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) specific implementation is: be that the tube section is grouping to half cylindrical shell successively, press the numbering of 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, the small end of the big end of second shell ring and the 3rd shell ring is grouping, 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) specific implementation is: will organize finishing tube section, being positioned over respectively changes on the canister, rotates canister, adjusts tube section top bus 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) specific 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 by 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 height.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 schematic diagram 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 (POWERMAX1650 5.5mx14m) that plate is carried out curvilinear cut.Point to cylindrical shell bottom, bus place, top 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 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, this device has adopted milling mode, in the time of finished edge, can advance automatically along panel edges, the metal removal rate height need not people's pushing hands and holds up during work, changed the situation that traditional curve slope machine needs people's pushing hands to hold up.Adjust the milling amount and the height of curve slope machine, the edges of boards after cutting is finished 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, it is curved to roll, three steps of set round are finished.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, the roll-in line is overlapped all the time with the bus of fan-shaped blank rolling when curved constantly adjustment roll-in line 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.By 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, be that the tube section is grouping to half cylindrical shell successively, press the numbering of 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, the small end of the big end of second shell ring and the 3rd shell ring is grouping, 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 finishing a tube section, group to the time constantly adjust the position of 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 finishing tube section, big end relatively, being positioned over two covers respectively changes on the canisters, rotates canister, adjusts tube section top bus 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 0～3 mm.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 (10)
1. right cone stainless steel tank body forming method, it is characterized in that: described right cone stainless steel tank body forming method may further comprise the steps:
1) cylindrical shell plate cutting;
2) shell ring moulding;
3) tank body moulding.
2. right cone stainless steel tank body forming method according to claim 1 is characterized in that: described 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: described right cone stainless steel tank body forming method also comprises:
5) tank inner surface being carried out acid wash passivation handles.
4. according to claim 1 or 2 or 3 described right cone stainless steel tank body forming methods, it is characterized in that: may further comprise the steps of described step 1):
1.1) the shell ring expansion, its specific 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 specific 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 specific implementation is: after the plate Numerical control cutting, adopting milling mode is that the groove of curve is opened system to edges of boards.
5. right cone stainless steel tank body forming method according to claim 4 is characterized in that: described step 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.
6. right cone stainless steel tank body forming method according to claim 5 is characterized in that: described step 2.1) may further comprise the steps:
2.1.1) to shell ring pre-bending;
2.1.2) shell ring is rolled curved, its specific implementation is: fan-shaped plate is rule as benchmark with shell ring top, bottom bus, 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;
2.1.3) to the shell ring set round, its specific 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.
7. right cone stainless steel tank body forming method according to claim 6, it is characterized in that: described 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.
8. right cone stainless steel tank body forming method according to claim 7, it is characterized in that: specific implementation described step 3.1) is: be that the tube section is grouping to half cylindrical shell successively, press the numbering of 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, the small end of the big end of second shell ring and the 3rd shell ring is grouping, 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.
9. right cone stainless steel tank body forming method according to claim 8, it is characterized in that: specific implementation described step 3.2) is: will organize finishing the tube section, big end relatively, being positioned over respectively changes on the canister, rotate canister, adjust tube section top bus bottom, the bottom bus of guaranteeing two sections is at straight line, and group becomes a cylindrical shell to two sections.
10. right cone stainless steel tank body forming method according to claim 9, it is characterized in that: specific implementation described 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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| CN112894083A (en) * | 2021-01-27 | 2021-06-04 | 广船国际有限公司 | Automatic butt welding method for 9Ni steel of marine storage tank |
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