CN102990237A - Welding technology for large connecting cylinder - Google Patents

Welding technology for large connecting cylinder Download PDF

Info

Publication number
CN102990237A
CN102990237A CN2012104080631A CN201210408063A CN102990237A CN 102990237 A CN102990237 A CN 102990237A CN 2012104080631 A CN2012104080631 A CN 2012104080631A CN 201210408063 A CN201210408063 A CN 201210408063A CN 102990237 A CN102990237 A CN 102990237A
Authority
CN
China
Prior art keywords
welding
cylindrical shell
polishing
splicing groove
flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012104080631A
Other languages
Chinese (zh)
Inventor
罗志强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
South China Marine Machinery Co Ltd
Original Assignee
South China Marine Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by South China Marine Machinery Co Ltd filed Critical South China Marine Machinery Co Ltd
Priority to CN2012104080631A priority Critical patent/CN102990237A/en
Publication of CN102990237A publication Critical patent/CN102990237A/en
Pending legal-status Critical Current

Links

Abstract

The invention discloses a welding technology for a large connecting cylinder. The welding technology comprises the following steps of dividing a large flange material into a plurality of small sections for blanking and opening a splicing groove, and then forming a flange shape; welding at each butt joint front and back by several times; polishing and cleaning a welded seam after welding each time; carrying out ultrasonic detection on all welded seams after welding; carrying out blanking on a panel and opening the splicing groove on the panel according to the shape of the cylinder and molding through rolling; welding at the butt joint front and back by several times, polishing and cleaning the butt joint and carrying out ultrasonic detection on the butt joint, then reshaping the cylinder by rolling again and seaming the side of the cylinder; and finally, splicing the two welded flanges at the upper end surface and the lower end surface of the cylinder for integral splicing, and removing welding stress of a whole welded piece. Compared with the prior art, the welding technology solves the problems that the welded seam is easy to have residues and the welded pieces are deformed too much when the traditional ordinary welding method for the connecting cylinder is used for welding large flanges.

Description

The welding technique of large-scale connection cylindrical shell
Technical field
The present invention relates to ship machinery manufacturing technology field, particularly a kind of boats and ships with the welding technique of large-scale connection cylindrical shell.
Background technology
The conventional flange welding method includes: at first carry out blanking and single face and beat groove; Then the also spot welding that lower good material is bolted together is fixed; Point welds rear disposable welding; Weld rear grinder buffing; Visual examination weldquality again; The timely repair welding of pinpointing the problems; Carry out at last the steps such as ultrasonic examination.Above-mentioned this welding method can only be used for the welding of small-sized connection cylindrical shell, and when being used for boats and ships with the welding of large-scale connection cylindrical shell, excessively dark owing to the depth of weld, welding heat is larger, causes easily the weld seam slag inclusion, the problems such as weldment gross distortion.
Summary of the invention
The object of the present invention is to provide the welding technique of the less large-scale connection cylindrical shell of a kind of weldment distortion.
In order to address the above problem, the technical scheme of the welding technique of this large-scale connection cylindrical shell is: the welding technique of this large-scale connection cylindrical shell, include following steps: step 101: flange segmentation blanking is divided into some segments by the material of a large flange and carries out blanking; Step 102: open the splicing groove, at the weld bond place of every lower described segment material well double open splicing groove; Step 103: the flange assembly unit is assembled into described flange shape with the described segment material of holding described splicing groove successfully; Step 104: the gradation welding, in the joint gradation positive and negative welding of each described splicing groove; Step 105: the polishing back chipping, all want the butt welded seam cleaning of polishing after each described welding; Step 106: ultrasonic examination, all weld seams of the described flange that welding is finished carry out ultrasonic examination; Step 107: the cylindrical shell plate cutting, carry out blanking according to the shape of cylindrical shell to sheet material; Step 108: open the splicing groove, at the weld bond place of lower good rectangle sheet material double open splicing groove; Step 109: the cylindrical shell roll-forming, with rolling equipment described rectangle sheet material roller is made type; Step 110: the gradation welding, in the joint gradation positive and negative welding of described splicing groove; Step 111: the polishing back chipping, all want the butt welded seam cleaning of polishing after each described welding; Step 112: ultrasonic examination, all weld seams of the described cylindrical shell that welding is finished carry out ultrasonic examination; Step 113: the multiple roller shaping of cylindrical shell and face seam, the described cylindrical shell that described ultrasonic examination is qualified is put into the seam backmost that described rolling equipment carries out shaping and weld seam again; Step 114: integral assembling is assembled in two described flanges that weld up and down on the upper and lower end face of described cylindrical shell; Step 115: the symmetrical backstep welding of segmentation, carry out the symmetrical backstep welding of segmentation to two whole circle assembly unit seams up and down; Step 116: the polishing back chipping, all want the butt welded seam cleaning of polishing after each described welding; Step 117: ultrasonic examination, the described up and down weld seam of two whole circle assembly unit seams that welding is finished carries out ultrasonic examination; Step 118: destressing is processed, and whole the workpiece that welding is finished goes welding stress to process.
Because adopt technique scheme, the present invention compared with prior art has following beneficial effect:
The present invention has the weld seam through welding, is out of shape the advantages such as less without slag inclusion and welding work pieces.
Description of drawings
Fig. 1 is schematic flow sheet of the present invention.
Fig. 2 is the overall structure schematic diagram of the embodiment of the invention 1.
Fig. 3 is the flange welding method schematic diagram of the embodiment of the invention 1.
Fig. 4 is the method for welding cylindrical shell schematic diagram of the embodiment of the invention 1.
Fig. 5 is the integral welding method schematic diagram of the embodiment of the invention 1.
The specific embodiment
Embodiments of the present invention is further illustrated below in conjunction with accompanying drawing:
Large-sized flange welding method shown in Figure 1 includes following steps: step 101: flange segmentation blanking; Step 102: open the splicing groove; Step 103: flange assembly unit; Step 104: gradation welding; Step 105: polishing back chipping; Step 106: ultrasonic examination; Step 107: cylindrical shell plate cutting; Step 108: open the splicing groove; Step 109: cylindrical shell roll-forming; Step 110: gradation welding; Step 111: polishing back chipping; Step 112: ultrasonic examination; Step 113: the multiple roller shaping of cylindrical shell and face seam; Step 114: integral assembling; Step 115: the symmetrical backstep welding of segmentation; Step 116: polishing back chipping; Step 117: ultrasonic examination; Step 118: destressing is processed.Specific implementation method is as follows:
The described large-scale connection cylindrical shell of Fig. 2, include a cylindrical shell 1 and be welded with two flanges 2 in the upper and lower end face of cylindrical shell 1, stack shell at cylindrical shell 1 is provided with a plurality of suspension hooks 3, its assembly unit welding process is specific as follows: at first carry out flange 2 welding (as shown in Figure 3), flange 2 usefulness slab made allowance blanking sectionally smooth joins, gas cutting double open splicing groove Sheet golden clothes allotment of labor draws assembly line at mounting plate, after lifting is ajusted, check the plane with level meter, use the tape measure size, qualified rear spot welding is fixed on inspection.Flange 2 is the high-strength deck of boat of EH36, use is welded through the welding wire LW-71 of classification society approval, / 3rd thickness of first weldering one side, then turn, with Φ 8X355mm carbon-point, I electric current=350~400A, P blast=0.4~0.6MPa carry out the clear root of weld of carbon arc air gouging, and polish root totally to seeing bright metal gloss with the air operated portable grinder saucer wheel.Weld again this face 1/2nd thickness, full to through welding weldering through the reverse welding that moves in turn.Then use abrasive machine polishing welding seams smooth surface, check weld seam through ultrasonic examination.Then carry out cylindrical shell 1 welding (as shown in Figure 4), cylindrical shell 1 blanking flame grooving, assembly unit is to length of run, with hydraulic press compacting cylindrical shell 1 starting the arc limit, roll bending cylindrical shell 1 diameter on numerical control Samsung roller bed, spot welding is fixed after bending size, and the welding of cylindrical shell 1, carbon are dug, polishing, flaw detection are undertaken by the mode of above-mentioned flange 2 welding, and outermost one aspect seam is capping seam again behind the multiple roller of Samsung roller bed.Carry out at last integral solder (as shown in Figure 5), flange 2 and cylindrical shell 1 are lifted, check coaxial and vertical requirement, the fixing assembling of qualified rear spot welding, its carbon digs, polishes, detects a flaw and carry out in the manner aforesaid, welding adopts the symmetrical backstep welding method of segmentation to weld, and all welding processes were finished after whole weldment carried out the destressing processing.

Claims (1)

1. the welding technique of a large-scale connection cylindrical shell is characterized in that including following steps:
Step 101: flange segmentation blanking is divided into some segments by the material of a large flange and carries out blanking;
Step 102: open the splicing groove, at the weld bond place of every lower described segment material well double open splicing groove;
Step 103: the flange assembly unit is assembled into described flange shape with the described segment material of holding described splicing groove successfully;
Step 104: the gradation welding, in the joint gradation positive and negative welding of each described splicing groove;
Step 105: the polishing back chipping, all want the butt welded seam cleaning of polishing after each described welding;
Step 106: ultrasonic examination, all weld seams of the described flange that welding is finished carry out ultrasonic examination;
Step 107: the cylindrical shell plate cutting, carry out blanking according to the shape of cylindrical shell to sheet material;
Step 108: open the splicing groove, at the weld bond place of lower good rectangle sheet material double open splicing groove;
Step 109: the cylindrical shell roll-forming, with rolling equipment described rectangle sheet material roller is made type;
Step 110: the gradation welding, in the joint gradation positive and negative welding of described splicing groove;
Step 111: the polishing back chipping, all want the butt welded seam cleaning of polishing after each described welding;
Step 112: ultrasonic examination, all weld seams of the described cylindrical shell that welding is finished carry out ultrasonic examination;
Step 113: the multiple roller shaping of cylindrical shell and face seam, the described cylindrical shell that described ultrasonic examination is qualified is put into the seam backmost that described rolling equipment carries out shaping and weld seam again;
Step 114: integral assembling is assembled in two described flanges that weld up and down on the upper and lower end face of described cylindrical shell;
Step 115: the symmetrical backstep welding of segmentation, carry out the symmetrical backstep welding of segmentation to two whole circle assembly unit seams up and down;
Step 116: the polishing back chipping, all want the butt welded seam cleaning of polishing after each described welding;
Step 117: ultrasonic examination, the described up and down weld seam of two whole circle assembly unit seams that welding is finished carries out ultrasonic examination;
Step 118: destressing is processed, and whole the workpiece that welding is finished goes welding stress to process.
CN2012104080631A 2012-10-24 2012-10-24 Welding technology for large connecting cylinder Pending CN102990237A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012104080631A CN102990237A (en) 2012-10-24 2012-10-24 Welding technology for large connecting cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012104080631A CN102990237A (en) 2012-10-24 2012-10-24 Welding technology for large connecting cylinder

Publications (1)

Publication Number Publication Date
CN102990237A true CN102990237A (en) 2013-03-27

Family

ID=47919636

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012104080631A Pending CN102990237A (en) 2012-10-24 2012-10-24 Welding technology for large connecting cylinder

Country Status (1)

Country Link
CN (1) CN102990237A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105171347A (en) * 2015-08-28 2015-12-23 沈阳航天新光集团有限公司 Field mounting method for test chamber
CN105269251A (en) * 2014-07-20 2016-01-27 安庆市亿豪工贸发展有限公司 Manufacturing process for flange sleeve of hydraulic cylinder
CN105750835A (en) * 2015-12-16 2016-07-13 中山市毅马五金有限公司 Flange end plate machining process
CN109014786A (en) * 2018-08-27 2018-12-18 山东核电设备制造有限公司 A kind of manufacturing method of Large Steel module
CN110842473A (en) * 2019-11-13 2020-02-28 西安交通大学 Radial continuous path friction stir additive manufacturing process for large thick-wall disc-shaped ring piece
CN111715986A (en) * 2020-07-21 2020-09-29 郑州九冶三维化工机械有限公司 Manufacturing method of large-diameter thick-wall flange cylinder
CN112025216A (en) * 2020-08-18 2020-12-04 江苏大信环境科技有限公司 Flange production process
CN112077532A (en) * 2020-08-10 2020-12-15 南通贝思特机械工程有限公司 Groove body assembling and welding method
CN112846557A (en) * 2020-12-31 2021-05-28 沈阳鼓风机集团核电泵业有限公司 Machining method of large assembly welding shell

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5874296A (en) * 1981-10-29 1983-05-04 Topy Ind Ltd Butt welding method for cylinder
CN101412157A (en) * 2008-11-21 2009-04-22 中信重工机械股份有限公司 Control method of large-sized mining grinding mill end flange welding deformation
CN101941139A (en) * 2010-09-02 2011-01-12 中信重工机械股份有限公司 Welding and assembling method for huge mining mill barrel
WO2011051496A1 (en) * 2009-11-02 2011-05-05 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Method for producing a hollow body
CN102266936A (en) * 2010-06-02 2011-12-07 鞍钢重型机械有限责任公司 Fabrication method of hot metal ladle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5874296A (en) * 1981-10-29 1983-05-04 Topy Ind Ltd Butt welding method for cylinder
CN101412157A (en) * 2008-11-21 2009-04-22 中信重工机械股份有限公司 Control method of large-sized mining grinding mill end flange welding deformation
WO2011051496A1 (en) * 2009-11-02 2011-05-05 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Method for producing a hollow body
CN102266936A (en) * 2010-06-02 2011-12-07 鞍钢重型机械有限责任公司 Fabrication method of hot metal ladle
CN101941139A (en) * 2010-09-02 2011-01-12 中信重工机械股份有限公司 Welding and assembling method for huge mining mill barrel

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
张建东 等: ""大型法兰制造工艺的优化设计"", 《管道技术与设备》, vol. 0, no. 6, 30 December 2002 (2002-12-30), pages 13 - 14 *
杨松 等: "《锅炉压力容器焊接技术培训教材》", 31 July 2005, article ""锅炉压力容器焊接技术培训教材"", pages: 370-373 *
楼飞民 等: ""大型筒体的制作工艺及质量控制"", 《电力机械》, vol. 26, no. 104, 30 April 2005 (2005-04-30), pages 81 - 83 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105269251A (en) * 2014-07-20 2016-01-27 安庆市亿豪工贸发展有限公司 Manufacturing process for flange sleeve of hydraulic cylinder
CN105171347A (en) * 2015-08-28 2015-12-23 沈阳航天新光集团有限公司 Field mounting method for test chamber
CN105750835A (en) * 2015-12-16 2016-07-13 中山市毅马五金有限公司 Flange end plate machining process
CN109014786A (en) * 2018-08-27 2018-12-18 山东核电设备制造有限公司 A kind of manufacturing method of Large Steel module
CN109014786B (en) * 2018-08-27 2020-06-12 山东核电设备制造有限公司 Manufacturing method of large steel module
CN110842473A (en) * 2019-11-13 2020-02-28 西安交通大学 Radial continuous path friction stir additive manufacturing process for large thick-wall disc-shaped ring piece
CN110842473B (en) * 2019-11-13 2020-09-15 西安交通大学 Radial continuous path friction stir additive manufacturing process for large thick-wall disc-shaped ring piece
CN111715986A (en) * 2020-07-21 2020-09-29 郑州九冶三维化工机械有限公司 Manufacturing method of large-diameter thick-wall flange cylinder
CN111715986B (en) * 2020-07-21 2021-11-05 郑州九冶三维化工机械有限公司 Manufacturing method of large-diameter thick-wall flange cylinder
CN112077532A (en) * 2020-08-10 2020-12-15 南通贝思特机械工程有限公司 Groove body assembling and welding method
CN112025216A (en) * 2020-08-18 2020-12-04 江苏大信环境科技有限公司 Flange production process
CN112846557A (en) * 2020-12-31 2021-05-28 沈阳鼓风机集团核电泵业有限公司 Machining method of large assembly welding shell

Similar Documents

Publication Publication Date Title
CN102990237A (en) Welding technology for large connecting cylinder
CN103753061A (en) Machining method for forklift fork arm carrier
CN103692166B (en) The preparation method of the thick alloy-steel plate of a kind of spy
CN102009252A (en) Vertical position welding process method of steel for high-strength hull structure
CN105081683A (en) Machining technology of straight-seam steel reel pipe
CN103921009A (en) Straight welded joint crack sensitivity evaluation method and multivariant restraining plate for evaluating
CN101664771A (en) Abutting hidden arc welding method of pipe
CN102029457A (en) Vertical butt welding process of high-strength steel for ship structures
CN203918200U (en) A kind of copper liner
CN102350574B (en) Argon arc welding double-gun butt-welding method
CN102009253A (en) Transverse welding technical method for high-strength steel for ship structure
CN101637846A (en) Method for robot double wire welding aluminum alloy materials
CN202162537U (en) High-frequency straight welded pipe production line
CN101885011A (en) Making process of high strength steel straight seam steel tube
CN202037430U (en) Rotatable T-shaped welding pipe support
CN111906417A (en) Non-groove welding process method for submerged-arc welding of medium plate joint
CN103111733A (en) Welding method for high-weather resistance steel and stainless steel
CN103753161B (en) A kind of processing technology for the cooling heat(ing) coil on main equipment
CN201778036U (en) Structure for preventing metallurgical slag pot body from deforming and cracking
CN203526875U (en) Automatic welding device
CN101530946A (en) Reverse side lifting device in single-side welding double-side molding welding mechanism
CN201881069U (en) All-in-one machine for jointing and turning plates
CN103934625A (en) Piston rod insetting process for jack and stand column
CN202780361U (en) Novel excavator counterweigh assembling and welding tool
CN210550085U (en) Metal material surface treatment device

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130327

C02 Deemed withdrawal of patent application after publication (patent law 2001)