CN105643199A - Manufacturing technology for spherical tanks - Google Patents
Manufacturing technology for spherical tanks Download PDFInfo
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- CN105643199A CN105643199A CN201410701725.3A CN201410701725A CN105643199A CN 105643199 A CN105643199 A CN 105643199A CN 201410701725 A CN201410701725 A CN 201410701725A CN 105643199 A CN105643199 A CN 105643199A
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- spherical tank
- tank shell
- shell plates
- flange
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Abstract
The invention discloses a manufacturing technology for spherical tanks. The manufacturing technology for the spherical tanks comprises the processes of 1, rough blanking (first-time blanking); 2, cold press molding; 3, accurate blanking; 4, groove cutting; 5, shell plate shaping (second-time shaping); 6, flange, connection pipe and flange assembling and welding. The manufacturing technology has the advantages that the operation is easy, the requirement for the experience of operators is low and the product quality is high.
Description
Technical field
The present invention relates to a kind of spherical tank manufacturing process.
Background technology
The adjustment in processing step and device parameter etc. of the existing spherical tank manufacturing process there is also certain empirical and technical, for the operator newly started with, in addition it is also necessary to carry out substantial amounts of exercise and could grasp operation skill, produces the good product of quality.
Summary of the invention
In order to realize the purpose of the present invention, the present invention provides the spherical tank manufacturing process of a kind of easy to operate, quick, easy left-hand seat.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of spherical tank manufacturing process, including following operation:
1), woollen (first time blanking)
1.1) line: Spherical Tank Shell Plates woollen should carry out blanking, typesetting according to material specification, its size generally adds 30mm again than the every limit of the Spherical Tank Shell Plates size of Theoretical Calculation;
1.2) blanking of Spherical Tank Shell Plates, for ensureing cutting stock precision and round and smooth degree, adopts secondary stuff-assignment method to make;
1.3) Spherical Tank Shell Plates must not be spliced, and surface does not allow there is crackle, bubble, scabs, folding and the defect such as be mingled with; Spherical Tank Shell Plates must not have layering;
2), cold moudling
2.1) the spherical shell steel plate edge before molding must not have wedge angle, slag etc. to cause the defect of stress raisers; Before die mould, oxide skin and the foreign material thereof of surface of steel plate to be removed, in die mould process, the oxide skin on coverboard and loose tool should be cleaned at any time;
2.2) molding of Spherical Tank Shell Plates adopts multiple spot cold pressing forming process, and each deformation should be consistent, and curvature should be uniform; During profiling operation, upper mould progressively shifts to the other end from coverboard one end, and cope match-plate pattern should be slow when pressing down every time; Press and be not pressed onto the end under first time, it is to avoid coverboard produces excessive sudden change or folding line, forbid sharply processing and forming; The every pressurized of coverboard is once mobile once to be moved every time and leaves certain calendering faying surface, and this faying surface keeps consistent in coverboard length as far as possible; Spherical Tank Shell Plates molding should be carried out above ambient temperature 0 DEG C;
2.3) first time die mould need to use chord length >=2000mm pre-profiling model inspection curvature tolerance, its gap e��2mm;
2.4), when Spherical Tank Shell Plates local curvature is overproof, the available method adding backing plate repaiies type; When repairing type, upper lower bolster should not too be drawn close, to prevent from weighing Spherical Tank Shell Plates surface wounded;
3), concentrate
3.1) making of Spherical Tank Shell Plates concentrate model is calculated by spherical tank inner surface size; Seeing " Spherical Tank Shell Plates inner surface physical dimension ", its size tolerance requirements is as follows:
Broadwise chord length is: �� 0.5mm, arc length be: �� 0.5mm;
Radially chord length is: �� 0.5mm, arc length be: �� 0.5mm; Diagonal chord length is: �� 0.5mm;
3.2) Spherical Tank Shell Plates of this stroke of material is except marking the edge line after gas cutting, inspection line (from gas cutting line 400mm) and groove line should be marked, and play punching on gas cutting line and inspection line, punching position is in the corner of coverboard and gas cutting line, inspection line and centrage intersection, gas cutting line, inspection line make a call to three punchings, the punching degree of depth��0.5mm;
3.3) line size tolerance requirements:
Broadwise chord length is: �� 1mm, arc length be: �� 1mm; Radially chord length is: �� 1mm, arc length be: �� 1mm; Diagonal chord length is: spacing between �� 1mm, diagonal :��3mm; Checking that line and gas cutting distance between centers of tracks are 0.5mm, it must be deviation in the same direction that every limit measures at 3;
4), beveling and cutting
4.1) cutting of Spherical Tank Shell Plates adopts semi auto cutting machine to carry out flame gas cutting; Check the curvature of coverboard before gas cutting with the curvature model of chord length 2000mm, underproof do not carry out gas cutting;
4.2) before formal gas cutting, outside cutting torch should being removed secant, the groove of test tapping 200mm length, check that whether size is correct, formal bevel cut after qualified, could be started; After one side gas cutting is complete, before preparing corresponding opposite side is carried out gas cutting, tackle burnisher dege measurement, in order to gas cutting line is adjusted, to ensure that two lines of cut after gas cutting are from checking that line sum is for 100mm;
4.3) groove face should be smooth, and molten slag, oxide skin is clean clearly, and groove face must not have crackle and layering, answers reconditioning or soldering if defective;
4.4) physical dimension of groove and tolerance answer the requirement of coincidence pattern:
Groove half angular deviation: �� �� 2.5o;
Root face height deviation: a �� 1.0mm; The center displacement deviation: t �� 1.0mm;
4.5) root face polishing should keep smooth straight; Groove face roughness answers��25 ��m, and flatness answers��1mm;
4.6) polishing of groove of spherical shell plate cutting rear surface is smooth, and carries out dyeing inspection, and periphery 100mm scope planted agent carries out 100% ultrasonic examination by JB/T4730.3, and III grade qualified;
5), coverboard integer (second time integer)
5.1) all Spherical Tank Shell Plates are after gas cutting groove, will reexamine chord length, curvature equidimension, undesirable Spherical Tank Shell Plates must be made school type and process, and the physical dimension such as the chord length of Shi Meikuai coverboard each side, curvature, groove and diagonal pitch all meets the requirements;
5.2), after final molding, the coverboard of same size should have interchangeability;
5.3) the Spherical Tank Shell Plates theory physical dimension after final molding is shown in " Spherical Tank Shell Plates inner surface physical dimension table ", and its tolerance is as follows:
Length direction chord length franchise :�ܡ� 2.5mm;
Width chord length franchise :�ܡ� 2mm; Diagonal chord length franchise :�ܡ� 3mm; Article two, diagonal should at grade, during with two straight lines to angular measurement, the vertical dimension franchise of two straight lines :��5mm;
5.4) Spherical Tank Shell Plates curvature tolerance e, the model of application chord length >=1000mm checks; During Spherical Tank Shell Plates chord length < 1000mm, the chord length of model cannot be less than the chord length of Spherical Tank Shell Plates;
5.5) Spherical Tank Shell Plates curvature tolerance e, middle and periphery measuring point��3mm;
5.6) physical dimension of Spherical Tank Shell Plates, curvature, groove dimensional gaughing initial data all should fill in " Spherical Tank Shell Plates physical dimension inspection record ";
5.7), after final molding, Thickness sensitivity should be carried out piece by piece; Every piece of Spherical Tank Shell Plates is minimum should survey 5 points, and actual measurement thickness can not deduct the minus deviation of steel plate, i.e. 41.75mm less than nominal thickness;
6), the assembly welding of flange, adapter and flange
6.1) spherical tank forging should entrust the pressure container flange forge plant processing of specialty qualification, after processing go back to factory, should check its size by detail drawing, need to meet the requirements and can use;
6.2) flange, adapter carry out by drawing assembling, welding with flange etc., and ensure that its size to meet welding process requirement;
6.3) when flange assembly, adapter assembly, people's aperture member weld with Spherical Tank Shell Plates, it is ensured that the level of flange face;Flange face also should be perpendicular to adapter centrage, when its deviation must not exceed the 1%(flange outer diameter < 100mm of flange outer diameter, calculates by 100mm), and��3mm;
The weld seam that the 6.4 pairs of flanges, adapter and flange etc. connect carries out Non-Destructive Testing, detection method and qualified rank and refers to " 6 Non-Destructive Testing technique ";
6.5) go out the line of perforations being connected with manhole flange, base by drawing dimensional requirement number at pole band plate outer surface;
6.6) cut the hole being connected with manhole and polish groove;
6.7) by flange molectron and Spherical Tank Shell Plates group to, weld, lugs position and overhanging height tolerance��5mm, male flange face levelness deviation��3mm;
6.8) welding between flange, adapter, flange and Spherical Tank Shell Plates;
6.9) the work card tool that flange assembly assembles polish the place's soldering of work card tool and all faces of weld are removed with pole band plate;
6.10) composite welds that the butt weld welded mutually with pole band plate is connected with pole band plate, and work card has the burnishing part of soldering and carries out Non-Destructive Testing;
6.11), after flange, adapter, flange and Spherical Tank Shell Plates welding complete, within the scope of the band plate periphery 100mm of perforate pole and from opening diameter place, one times of perforate center, its curvature is checked with the model of chord length >=1000mm, maximal clearance��3mm between model and pole band plate.
The present invention is simple to operate, and operator's skill requirement is low, and product quality is high.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of spherical tank manufacturing process, including following operation:
1), woollen (first time blanking)
1.1) line: Spherical Tank Shell Plates woollen should carry out blanking, typesetting according to material specification, its size generally adds 30mm again than the every limit of the Spherical Tank Shell Plates size of Theoretical Calculation;
1.2) blanking of Spherical Tank Shell Plates, for ensureing cutting stock precision and round and smooth degree, adopts secondary stuff-assignment method to make;
1.3) Spherical Tank Shell Plates must not be spliced, and surface does not allow there is crackle, bubble, scabs, folding and the defect such as be mingled with; Spherical Tank Shell Plates must not have layering;
2), cold moudling
2.1) the spherical shell steel plate edge before molding must not have wedge angle, slag etc. to cause the defect of stress raisers; Before die mould, oxide skin and the foreign material thereof of surface of steel plate to be removed, in die mould process, the oxide skin on coverboard and loose tool should be cleaned at any time;
2.2) molding of Spherical Tank Shell Plates adopts multiple spot cold pressing forming process, and each deformation should be consistent, and curvature should be uniform; During profiling operation, upper mould progressively shifts to the other end from coverboard one end, and cope match-plate pattern should be slow when pressing down every time; Press and be not pressed onto the end under first time, it is to avoid coverboard produces excessive sudden change or folding line, forbid sharply processing and forming; The every pressurized of coverboard is once mobile once to be moved every time and leaves certain calendering faying surface, and this faying surface keeps consistent in coverboard length as far as possible; Spherical Tank Shell Plates molding should be carried out above ambient temperature 0 DEG C;
2.3) first time die mould need to use chord length >=2000mm pre-profiling model inspection curvature tolerance, its gap e��2mm;
2.4), when Spherical Tank Shell Plates local curvature is overproof, the available method adding backing plate repaiies type; When repairing type, upper lower bolster should not too be drawn close, to prevent from weighing Spherical Tank Shell Plates surface wounded;
3), concentrate
3.1) making of Spherical Tank Shell Plates concentrate model is calculated by spherical tank inner surface size; Seeing " Spherical Tank Shell Plates inner surface physical dimension ", its size tolerance requirements is as follows:
Broadwise chord length is: �� 0.5mm, arc length be: �� 0.5mm;
Radially chord length is: �� 0.5mm, arc length be: �� 0.5mm;Diagonal chord length is: �� 0.5mm;
3.2) Spherical Tank Shell Plates of this stroke of material is except marking the edge line after gas cutting, inspection line (from gas cutting line 400mm) and groove line should be marked, and play punching on gas cutting line and inspection line, punching position is in the corner of coverboard and gas cutting line, inspection line and centrage intersection, gas cutting line, inspection line make a call to three punchings, the punching degree of depth��0.5mm;
3.3) line size tolerance requirements:
Broadwise chord length is: �� 1mm, arc length be: �� 1mm; Radially chord length is: �� 1mm, arc length be: �� 1mm; Diagonal chord length is: spacing between �� 1mm, diagonal :��3mm; Checking that line and gas cutting distance between centers of tracks are 0.5mm, it must be deviation in the same direction that every limit measures at 3;
4), beveling and cutting
4.1) cutting of Spherical Tank Shell Plates adopts semi auto cutting machine to carry out flame gas cutting; Check the curvature of coverboard before gas cutting with the curvature model of chord length 2000mm, underproof do not carry out gas cutting;
4.2) before formal gas cutting, outside cutting torch should being removed secant, the groove of test tapping 200mm length, check that whether size is correct, formal bevel cut after qualified, could be started; After one side gas cutting is complete, before preparing corresponding opposite side is carried out gas cutting, tackle burnisher dege measurement, in order to gas cutting line is adjusted, to ensure that two lines of cut after gas cutting are from checking that line sum is for 100mm;
4.3) groove face should be smooth, and molten slag, oxide skin is clean clearly, and groove face must not have crackle and layering, answers reconditioning or soldering if defective;
4.4) physical dimension of groove and tolerance answer the requirement of coincidence pattern:
Groove half angular deviation: �� �� 2.5o;
Root face height deviation: a �� 1.0mm; The center displacement deviation: t �� 1.0mm;
4.5) root face polishing should keep smooth straight; Groove face roughness answers��25 ��m, and flatness answers��1mm;
4.6) polishing of groove of spherical shell plate cutting rear surface is smooth, and carries out dyeing inspection, and periphery 100mm scope planted agent carries out 100% ultrasonic examination by JB/T4730.3, and III grade qualified;
5), coverboard integer (second time integer)
5.1) all Spherical Tank Shell Plates are after gas cutting groove, will reexamine chord length, curvature equidimension, undesirable Spherical Tank Shell Plates must be made school type and process, and the physical dimension such as the chord length of Shi Meikuai coverboard each side, curvature, groove and diagonal pitch all meets the requirements;
5.2), after final molding, the coverboard of same size should have interchangeability;
5.3) the Spherical Tank Shell Plates theory physical dimension after final molding is shown in " Spherical Tank Shell Plates inner surface physical dimension table ", and its tolerance is as follows:
Length direction chord length franchise :�ܡ� 2.5mm;
Width chord length franchise :�ܡ� 2mm; Diagonal chord length franchise :�ܡ� 3mm; Article two, diagonal should at grade, during with two straight lines to angular measurement, the vertical dimension franchise of two straight lines :��5mm;
5.4) Spherical Tank Shell Plates curvature tolerance e, the model of application chord length >=1000mm checks; During Spherical Tank Shell Plates chord length < 1000mm, the chord length of model cannot be less than the chord length of Spherical Tank Shell Plates;
5.5) Spherical Tank Shell Plates curvature tolerance e, middle and periphery measuring point��3mm;
5.6) physical dimension of Spherical Tank Shell Plates, curvature, groove dimensional gaughing initial data all should fill in " Spherical Tank Shell Plates physical dimension inspection record ";
5.7), after final molding, Thickness sensitivity should be carried out piece by piece; Every piece of Spherical Tank Shell Plates is minimum should survey 5 points, and actual measurement thickness can not deduct the minus deviation of steel plate, i.e. 41.75mm less than nominal thickness;
6), the assembly welding of flange, adapter and flange
6.1) spherical tank forging should entrust the pressure container flange forge plant processing of specialty qualification, after processing go back to factory, should check its size by detail drawing, need to meet the requirements and can use;
6.2) flange, adapter carry out by drawing assembling, welding with flange etc., and ensure that its size to meet welding process requirement;
6.3) when flange assembly, adapter assembly, people's aperture member weld with Spherical Tank Shell Plates, it is ensured that the level of flange face; Flange face also should be perpendicular to adapter centrage, when its deviation must not exceed the 1%(flange outer diameter < 100mm of flange outer diameter, calculates by 100mm), and��3mm;
The weld seam that the 6.4 pairs of flanges, adapter and flange etc. connect carries out Non-Destructive Testing, detection method and qualified rank and refers to " 6 Non-Destructive Testing technique ";
6.5) go out the line of perforations being connected with manhole flange, base by drawing dimensional requirement number at pole band plate outer surface;
6.6) cut the hole being connected with manhole and polish groove;
6.7) by flange molectron and Spherical Tank Shell Plates group to, weld, lugs position and overhanging height tolerance��5mm, male flange face levelness deviation��3mm;
6.8) welding between flange, adapter, flange and Spherical Tank Shell Plates;
6.9) the work card tool that flange assembly assembles polish the place's soldering of work card tool and all faces of weld are removed with pole band plate;
6.10) composite welds that the butt weld welded mutually with pole band plate is connected with pole band plate, and work card has the burnishing part of soldering and carries out Non-Destructive Testing;
6.11), after flange, adapter, flange and Spherical Tank Shell Plates welding complete, within the scope of the band plate periphery 100mm of perforate pole and from opening diameter place, one times of perforate center, its curvature is checked with the model of chord length >=1000mm, maximal clearance��3mm between model and pole band plate.
Claims (1)
1. a spherical tank manufacturing process, is characterized in that: include following operation:
1), woollen (first time blanking)
1.1) line: Spherical Tank Shell Plates woollen should carry out blanking, typesetting according to material specification, its size generally adds 30mm again than the every limit of the Spherical Tank Shell Plates size of Theoretical Calculation;
1.2) blanking of Spherical Tank Shell Plates, for ensureing cutting stock precision and round and smooth degree, adopts secondary stuff-assignment method to make;
1.3) Spherical Tank Shell Plates must not be spliced, and surface does not allow there is crackle, bubble, scabs, folding and the defect such as be mingled with; Spherical Tank Shell Plates must not have layering;
2), cold moudling
2.1) the spherical shell steel plate edge before molding must not have wedge angle, slag etc. to cause the defect of stress raisers; Before die mould, oxide skin and the foreign material thereof of surface of steel plate to be removed, in die mould process, the oxide skin on coverboard and loose tool should be cleaned at any time;
2.2) molding of Spherical Tank Shell Plates adopts multiple spot cold pressing forming process, and each deformation should be consistent, and curvature should be uniform; During profiling operation, upper mould progressively shifts to the other end from coverboard one end, and cope match-plate pattern should be slow when pressing down every time; Press and be not pressed onto the end under first time, it is to avoid coverboard produces excessive sudden change or folding line, forbid sharply processing and forming; The every pressurized of coverboard is once mobile once to be moved every time and leaves certain calendering faying surface, and this faying surface keeps consistent in coverboard length as far as possible; Spherical Tank Shell Plates molding should be carried out above ambient temperature 0 DEG C;
2.3) first time die mould need to use chord length >=2000mm pre-profiling model inspection curvature tolerance, its gap e��2mm;
2.4), when Spherical Tank Shell Plates local curvature is overproof, the available method adding backing plate repaiies type; When repairing type, upper lower bolster should not too be drawn close, to prevent from weighing Spherical Tank Shell Plates surface wounded;
3), concentrate
3.1) making of Spherical Tank Shell Plates concentrate model is calculated by spherical tank inner surface size;Seeing " Spherical Tank Shell Plates inner surface physical dimension ", its size tolerance requirements is as follows:
Broadwise chord length is: �� 0.5mm, arc length be: �� 0.5mm;
Radially chord length is: �� 0.5mm, arc length be: �� 0.5mm; Diagonal chord length is: �� 0.5mm;
3.2) Spherical Tank Shell Plates of this stroke of material is except marking the edge line after gas cutting, inspection line (from gas cutting line 400mm) and groove line should be marked, and play punching on gas cutting line and inspection line, punching position is in the corner of coverboard and gas cutting line, inspection line and centrage intersection, gas cutting line, inspection line make a call to three punchings, the punching degree of depth��0.5mm;
3.3) line size tolerance requirements:
Broadwise chord length is: �� 1mm, arc length be: �� 1mm; Radially chord length is: �� 1mm, arc length be: �� 1mm; Diagonal chord length is: spacing between �� 1mm, diagonal :��3mm; Checking that line and gas cutting distance between centers of tracks are 0.5mm, it must be deviation in the same direction that every limit measures at 3;
4), beveling and cutting
4.1) cutting of Spherical Tank Shell Plates adopts semi auto cutting machine to carry out flame gas cutting; Check the curvature of coverboard before gas cutting with the curvature model of chord length 2000mm, underproof do not carry out gas cutting;
4.2) before formal gas cutting, outside cutting torch should being removed secant, the groove of test tapping 200mm length, check that whether size is correct, formal bevel cut after qualified, could be started; After one side gas cutting is complete, before preparing corresponding opposite side is carried out gas cutting, tackle burnisher dege measurement, in order to gas cutting line is adjusted, to ensure that two lines of cut after gas cutting are from checking that line sum is for 100mm;
4.3) groove face should be smooth, and molten slag, oxide skin is clean clearly, and groove face must not have crackle and layering, answers reconditioning or soldering if defective;
4.4) physical dimension of groove and tolerance answer the requirement of coincidence pattern:
Groove half angular deviation: �� �� 2.5o;
Root face height deviation: a �� 1.0mm; The center displacement deviation: t �� 1.0mm;
4.5) root face polishing should keep smooth straight; Groove face roughness answers��25 ��m, and flatness answers��1mm;
4.6) polishing of groove of spherical shell plate cutting rear surface is smooth, and carries out dyeing inspection, and periphery 100mm scope planted agent carries out 100% ultrasonic examination by JB/T4730.3, and III grade qualified;
5), coverboard integer (second time integer)
5.1) all Spherical Tank Shell Plates are after gas cutting groove, will reexamine chord length, curvature equidimension, undesirable Spherical Tank Shell Plates must be made school type and process, and the physical dimension such as the chord length of Shi Meikuai coverboard each side, curvature, groove and diagonal pitch all meets the requirements;
5.2), after final molding, the coverboard of same size should have interchangeability;
5.3) the Spherical Tank Shell Plates theory physical dimension after final molding is shown in " Spherical Tank Shell Plates inner surface physical dimension table ", and its tolerance is as follows:
Length direction chord length franchise :�ܡ� 2.5mm;
Width chord length franchise :�ܡ� 2mm; Diagonal chord length franchise :�ܡ� 3mm; Article two, diagonal should at grade, during with two straight lines to angular measurement, the vertical dimension franchise of two straight lines :��5mm;
5.4) Spherical Tank Shell Plates curvature tolerance e, the model of application chord length >=1000mm checks; During Spherical Tank Shell Plates chord length < 1000mm, the chord length of model cannot be less than the chord length of Spherical Tank Shell Plates;
5.5) Spherical Tank Shell Plates curvature tolerance e, middle and periphery measuring point��3mm;
5.6) physical dimension of Spherical Tank Shell Plates, curvature, groove dimensional gaughing initial data all should fill in " Spherical Tank Shell Plates physical dimension inspection record ";
5.7), after final molding, Thickness sensitivity should be carried out piece by piece;Every piece of Spherical Tank Shell Plates is minimum should survey 5 points, and actual measurement thickness can not deduct the minus deviation of steel plate, i.e. 41.75mm less than nominal thickness;
6), the assembly welding of flange, adapter and flange
6.1) spherical tank forging should entrust the pressure container flange forge plant processing of specialty qualification, after processing go back to factory, should check its size by detail drawing, need to meet the requirements and can use;
6.2) flange, adapter carry out by drawing assembling, welding with flange etc., and ensure that its size to meet welding process requirement;
6.3) when flange assembly, adapter assembly, people's aperture member weld with Spherical Tank Shell Plates, it is ensured that the level of flange face; Flange face also should be perpendicular to adapter centrage, when its deviation must not exceed the 1%(flange outer diameter < 100mm of flange outer diameter, calculates by 100mm), and��3mm;
The weld seam that the 6.4 pairs of flanges, adapter and flange etc. connect carries out Non-Destructive Testing;
6.5) go out the line of perforations being connected with manhole flange, base by drawing dimensional requirement number at pole band plate outer surface;
6.6) cut the hole being connected with manhole and polish groove;
6.7) by flange molectron and Spherical Tank Shell Plates group to, weld, lugs position and overhanging height tolerance��5mm, male flange face levelness deviation��3mm;
6.8) welding between flange, adapter, flange and Spherical Tank Shell Plates;
6.9) the work card tool that flange assembly assembles polish the place's soldering of work card tool and all faces of weld are removed with pole band plate;
6.10) composite welds that the butt weld welded mutually with pole band plate is connected with pole band plate, and work card has the burnishing part of soldering and carries out Non-Destructive Testing;
6.11), after flange, adapter, flange and Spherical Tank Shell Plates welding complete, within the scope of the band plate periphery 100mm of perforate pole and from opening diameter place, one times of perforate center, its curvature is checked with the model of chord length >=1000mm, maximal clearance��3mm between model and pole band plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410701725.3A CN105643199A (en) | 2014-11-28 | 2014-11-28 | Manufacturing technology for spherical tanks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410701725.3A CN105643199A (en) | 2014-11-28 | 2014-11-28 | Manufacturing technology for spherical tanks |
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| CN105643199A true CN105643199A (en) | 2016-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500493A (en) * | 2017-12-07 | 2018-09-07 | 浙江星卓换热设备有限公司 | A kind of processing technology taken over flange |
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2014
- 2014-11-28 CN CN201410701725.3A patent/CN105643199A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500493A (en) * | 2017-12-07 | 2018-09-07 | 浙江星卓换热设备有限公司 | A kind of processing technology taken over flange |
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Application publication date: 20160608 |