CN102019513A - Thick metal plate back gouging-free welding groove technology and machining process - Google Patents
Thick metal plate back gouging-free welding groove technology and machining process Download PDFInfo
- Publication number
- CN102019513A CN102019513A CN2010105423358A CN201010542335A CN102019513A CN 102019513 A CN102019513 A CN 102019513A CN 2010105423358 A CN2010105423358 A CN 2010105423358A CN 201010542335 A CN201010542335 A CN 201010542335A CN 102019513 A CN102019513 A CN 102019513A
- Authority
- CN
- China
- Prior art keywords
- welding
- groove
- liner
- double
- ground floor
- 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.)
- Granted
Links
Images
Abstract
The invention relates to thick metal plate back gouging-free welding groove technology. The technology is characterized in that: a welding groove consists of a substrate V-shaped groove and two layers of gaskets connected to the lower surface of the substrate V-shaped groove. A welding process comprises the following steps of: before the two sides of a substrate are rolled, machining a single-sided 2 to 10-degree V-shaped groove on a facing machine, and after the two sides of the substrate are rolled and molded, forming the V-shaped groove with the bottom gap of 16 to 26 mm and the opening of 4 to 20 degrees; fixing a first layer of gasket on the two sides of the groove by arc welding; fixing a second layer of gasket on the first layer of gasket by welding; welding an entire welding line according to the requirements of a welding process instruction; chopping a part of the two layers of gaskets by adopting a flame cutting method to keep the weld reinforcement of 3 to 5 mm; and grinding the weld reinforcement off by adopting a grinding wheel machine. In the technology and the welding process, the welding line is molded once, the times of preheating, dehydrogenation and flaw detection are reduced in the welding process, the manufacturing cost is saved and a manufacturing cycle is shortened.
Description
Technical field
The present invention relates to a kind of solder technology, relate in particular to the Lincoln weld of pressure vessel slab belt material pad and exempt from back chipping bevel for welding technology.
Background technology
Prior art is aspect the thick sheet metal welding of boiler, pressure vessel, and the bevel for welding form of employing roughly has four kinds: 1) V-type belt material pad groove; 2) U type groove; 3) double-U-shaped groove; 4) U+V type groove.The shortcoming of prior art is: no matter adopt any in above-mentioned four kinds of groove types, after single-sided welding is finished, before the welding another side, need carry out back chipping to root with carbon arc air gouging and handle, use grinder buffing then.If grinder buffing is not thorough, then the easy butt welded seam of carburized layer that produces in the back chipping process of carbon arc air gouging and mother metal produce harmful effect.Simultaneously, in the thick plates of boiler, pressure vessel, need weld preheating and the postwelding hydrogen that disappears to handle usually.When adopting prior art, need carry out twice preheating, twice disappear hydrogen and twice flaw detection.Like this, welding a weld seam not only can increase welding cost and increase manufacturing schedule, and back chipping can influence the weldquality performance simultaneously.
Summary of the invention
The objective of the invention is defective, design the thick gold of a kind of V-type belt material pad groove at prior art
Belong to plate and exempt from back chipping bevel for welding technology and processing technology.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of thick sheet metal is exempted from back chipping bevel for welding technology,It is characterized in that:
Form by mother metal double V-groove and the two-layer liner that is connected below the mother metal double V-groove;
The opening degree of double V-groove is single face 2 degree-10 degree;
Root gap is 16～26mm;
The ground floor liner is split, lay respectively at groove two sides below, medial surface flushes with the lower end of groove, specification is: 20 * 6 band steel;
Material is identical with mother metal or generic with mother metal;
Second layer liner is whole, is positioned at below the ground floor liner, and specification is: 60 * 8 band steel;
Material is a common straightcarbon steel.
A kind of thick sheet metal is exempted from the processing technology of back chipping bevel for welding technology,It is characterized in that:
1) the mother metal both sides process the double V-groove of monolateral 2-10 degree earlier on beveling machine before rolling, and forming a bottom gap behind the roll-forming is 16～26mm, and opening angle is the double V-groove of 4-20 degree;
2) adopt fixedly ground floor liner of manual electric arc welding in the both sides of described groove;
3) on the ground floor liner, weld fixedly second layer liner;
4) require welding whole piece weld seam according to the welding procedure guiding book;
5) adopt the mode of flame cutting that the part of two liners is cut off, keep the reinforcement of 3～5mm;
6) reinforcement employing abrasive machine worn 5).
The welding procedure of the present invention and prior art is compared as follows:
The welding procedure of prior art is:
⑴ weld liner; ⑵ preheating; ⑶ single-sided welding; ⑷ the hydrogen that disappears is handled; ⑸ back gouging; ⑹ grinder buffing: ⑺ PT/MT flaw detection is qualified: ⑻ is preheating again: ⑼ welds the back side: the ⑽ back side hydrogen that disappears; ⑾ polishing welding seams reinforcement; ⑿ cylindrical shell flaw detection (RT+UT+MT).
The welding procedure of bevel for welding of the present invention is:
⑴ weld liner; ⑵ preheating; ⑶ single-sided welding; ⑷ the hydrogen that disappears is handled; ⑸ back side flame cutting mat; ⑹ grinder buffing weld reinforcement: ⑺ cylindrical shell flaw detection (RT+UT+MT).
The invention has the beneficial effects as follows:
The weld seam one-shot forming reduces the preheating in the welding process, the number of times of disappear hydrogen and flaw detection, saves manufacturing cost and shortens the manufacturing cycle; Postwelding adopts the mode of flame cutting and abrasive machine polishing to remove two liners, and can not injure mother metal and weld(ing) deposit, can guarantee the good fusion quality of weld metal and mother metal.
Description of drawings
Fig. 1 is a common Lincoln weld groove generalized section of the present invention;
Fig. 2 is that the present invention is used for narrow gap Lincoln weld groove generalized section.
Shown in the figure: 1, mother metal, 2, the ground floor liner, 3, second layer liner.
The specific embodiment
Below by embodiment also in conjunction with the accompanying drawings, the technical scheme to invention is further described in detail.
Embodiment 1:
Adopt the example of common submerged-arc welding as shown in Figure 1, gas bag plate both sides process the double V-groove of monolateral 8 degree earlier on beveling machine before rolling, and forming a bottom gap behind the roll-forming is 20～24mm, and opening angle is the double V-grooves of 16 degree.Adopt fixedly ground floor liner (material is identical with mother metal) of manual electric arc welding in the both sides of this groove then, need adopt little standard welding parameter during manual electric arc welding, prevent from the mother metal both sides are produced the undercut defective.After the ground floor liner fixes, on the ground floor liner, weld fixedly second layer liner (material common straightcarbon steel 20#) then.After treating that double layer cushion all fixes, can require welding whole piece weld seam according to the welding procedure guiding book.After treating that the welding of whole piece weld seam is finished, can adopt the mode of flame cutting that the part of two liners is cut off, keep the reinforcement of 3～5mm, adopt worn this part reinforcement of abrasive machine to get final product then.
Embodiment 2:
Example when adopting the Lincoln weld of narrow gap as shown in Figure 2, gas bag plate both sides are before rolling, and one monolateral 2 of processing is spent on beveling machine earlier, and root gap is 18～20mm, and opening angle is the double V-grooves of 4 degree.Ground floor liner material and mother metal are generic; Second layer liner material is common straightcarbon steel Q235A.All the other are with embodiment 1.
Claims (3)
1. a thick sheet metal is exempted from back chipping bevel for welding technology, it is characterized in that:
Form by mother metal double V-groove and the two-layer liner that is connected below the mother metal double V-groove;
The opening degree of double V-groove is single face 2-10 degree;
Root gap is 16～26mm;
The ground floor liner is split, lay respectively at groove two sides below;
Material is identical with mother metal or generic with mother metal;
Second layer liner is whole, is positioned at below the ground floor liner;
Material is a common straightcarbon steel.
2. slab according to claim 1 is exempted from back chipping bevel for welding technology, it is characterized in that:
Ground floor liner specification is: 20 * 6 band steel;
Second layer liner specification is: 60 * 8 band steel.
3. a thick sheet metal as claimed in claim 1 is exempted from the processing technology of back chipping bevel for welding technology, it is characterized in that:
1) the mother metal both sides process the double V-groove of monolateral 2-10 degree earlier on beveling machine before rolling, and forming a bottom gap behind the roll-forming is 16～26mm, and opening angle is the double V-groove of 4-20 degree;
2) adopt fixedly ground floor liner of manual electric arc welding in the both sides of described groove;
3) on the ground floor liner, weld fixedly second layer liner;
4) require welding whole piece weld seam according to the welding procedure guiding book;
5) adopt the mode of flame cutting that the part of two liners is cut off, keep the reinforcement of 3～5mm;
6) reinforcement employing abrasive machine worn 5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010542335 CN102019513B (en) | 2010-11-12 | 2010-11-12 | Thick metal plate back gouging-free welding groove and machining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010542335 CN102019513B (en) | 2010-11-12 | 2010-11-12 | Thick metal plate back gouging-free welding groove and machining process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102019513A true CN102019513A (en) | 2011-04-20 |
| CN102019513B CN102019513B (en) | 2013-04-24 |
Family
ID=43861511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010542335 Active CN102019513B (en) | 2010-11-12 | 2010-11-12 | Thick metal plate back gouging-free welding groove and machining process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102019513B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286415A (en) * | 2013-05-24 | 2013-09-11 | 武船重型工程股份有限公司 | Device for large-gap joint welding and welding process of device |
| CN103934543A (en) * | 2014-03-14 | 2014-07-23 | 中建钢构有限公司 | Welding backing plate mounting method |
| CN103962795A (en) * | 2013-01-28 | 2014-08-06 | 昆山华德宝通力扶梯设备有限公司 | Welding technology of lifting lug for offshore gas cylinder binding equipment |
| CN108015546A (en) * | 2017-12-28 | 2018-05-11 | 哈尔滨锅炉厂有限责任公司 | The paired production method of boiler and pressure vessel heavy caliber thick wall inclined pipe |
| CN110977215A (en) * | 2019-11-07 | 2020-04-10 | 鞍钢重型机械有限责任公司 | Cylinder body butt joint back chipping-free weld joint pretreatment process |
| CN112719704A (en) * | 2020-12-21 | 2021-04-30 | 中建五局土木工程有限公司 | Method for welding steel plates |
| CN112846466A (en) * | 2020-12-31 | 2021-05-28 | 大唐郓城发电有限公司 | Narrow gap welding process of G115 steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001001169A (en) * | 1999-06-16 | 2001-01-09 | Japan Steel & Tube Constr Co Ltd | Electro gas welding method |
| CN1931500A (en) * | 2006-10-08 | 2007-03-21 | 广州文冲船厂有限责任公司 | CO2 gas protected single-sided welding and double-sided forming process |
| EP1782913A2 (en) * | 2005-11-04 | 2007-05-09 | General Electric Company | Integral backing ring for stub shaft weld repairs of rotating equipment and related method |
| CN101342629A (en) * | 2008-08-15 | 2009-01-14 | 广州广船国际股份有限公司 | Main plate opposing connection welding method |
| KR20090062727A (en) * | 2007-12-13 | 2009-06-17 | 대우조선해양 주식회사 | One-sided welding method of butt welding joint |
| KR20100065449A (en) * | 2008-12-08 | 2010-06-17 | 대우조선해양 주식회사 | One-sided welding method of butt welding joint with v groove configuration |
-
2010
- 2010-11-12 CN CN 201010542335 patent/CN102019513B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001001169A (en) * | 1999-06-16 | 2001-01-09 | Japan Steel & Tube Constr Co Ltd | Electro gas welding method |
| EP1782913A2 (en) * | 2005-11-04 | 2007-05-09 | General Electric Company | Integral backing ring for stub shaft weld repairs of rotating equipment and related method |
| CN1931500A (en) * | 2006-10-08 | 2007-03-21 | 广州文冲船厂有限责任公司 | CO2 gas protected single-sided welding and double-sided forming process |
| KR20090062727A (en) * | 2007-12-13 | 2009-06-17 | 대우조선해양 주식회사 | One-sided welding method of butt welding joint |
| CN101342629A (en) * | 2008-08-15 | 2009-01-14 | 广州广船国际股份有限公司 | Main plate opposing connection welding method |
| KR20100065449A (en) * | 2008-12-08 | 2010-06-17 | 대우조선해양 주식회사 | One-sided welding method of butt welding joint with v groove configuration |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962795A (en) * | 2013-01-28 | 2014-08-06 | 昆山华德宝通力扶梯设备有限公司 | Welding technology of lifting lug for offshore gas cylinder binding equipment |
| CN103286415A (en) * | 2013-05-24 | 2013-09-11 | 武船重型工程股份有限公司 | Device for large-gap joint welding and welding process of device |
| CN103934543A (en) * | 2014-03-14 | 2014-07-23 | 中建钢构有限公司 | Welding backing plate mounting method |
| CN103934543B (en) * | 2014-03-14 | 2016-05-04 | 中建钢构有限公司 | The installation method of welding backing plate |
| CN108015546A (en) * | 2017-12-28 | 2018-05-11 | 哈尔滨锅炉厂有限责任公司 | The paired production method of boiler and pressure vessel heavy caliber thick wall inclined pipe |
| CN110977215A (en) * | 2019-11-07 | 2020-04-10 | 鞍钢重型机械有限责任公司 | Cylinder body butt joint back chipping-free weld joint pretreatment process |
| CN112719704A (en) * | 2020-12-21 | 2021-04-30 | 中建五局土木工程有限公司 | Method for welding steel plates |
| CN112846466A (en) * | 2020-12-31 | 2021-05-28 | 大唐郓城发电有限公司 | Narrow gap welding process of G115 steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102019513B (en) | 2013-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102019513B (en) | Thick metal plate back gouging-free welding groove and machining process | |
| CN105127562B (en) | Method for welding welded joint between stainless steel composite plate and austenitic stainless steel | |
| CN103706921B (en) | Hot-rolling finishing mill backing roll build-up welding repair method | |
| CN105081683A (en) | Machining technology of straight-seam steel reel pipe | |
| CN103658925B (en) | Heavy-gauge sheeting and steel-casting welding procedure | |
| CN103008898B (en) | The welding method of tack-weld method, welding method and box beam | |
| CN106239055A (en) | The design of a kind of heavy wall dissimilar steel joint groove and processing method | |
| CN102528304B (en) | Plate butt welding method and welding groove | |
| CN104493342A (en) | Medium thickness plate X-shaped bevel welding technology without back chipping | |
| CN110961763B (en) | Method for welding bimetal composite pipe fitting and pipeline | |
| CN104588850A (en) | Welding technology for steel plates | |
| CN103157916A (en) | H-shaped steel back-gouging-free welding method | |
| CN102500993A (en) | Welding repair method for martensitic stainless steel superlarge deep hole | |
| CN103737162A (en) | Compound welding method | |
| CN104439641A (en) | Aluminum plate welding process | |
| CN107538112A (en) | A kind of H profile steel thickness web welding method | |
| CN102350574A (en) | Argon arc welding double-gun butt-welding method | |
| CN105033459A (en) | Intermetallic compound control method of steel/niobium laser welding joint | |
| KR20120131592A (en) | Welding method for titanium pipe | |
| CN109940352A (en) | A kind of engineering wheel disc processing technology | |
| CN111037224B (en) | Welding method for carbon-free gouging back chipping of thick plate fusion penetration welded H-shaped steel | |
| CN102837116A (en) | Overlaying welding repairing technology of stainless steel cold-rolled bearing roller | |
| CN105364430B (en) | The method for laser welding that a kind of thin plate edge joint synchronously rolls | |
| CN110814646A (en) | Machining method of wear-resistant sealing ring | |
| CN111037082B (en) | Vacuum electron beam welding method for chromium bronze butt joint of annular workpiece with sandwich structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Zhiming Inventor after: Zeng Xianhua Inventor after: Jiang Long Inventor after: Lu Wei Inventor before: Wang Zhiming Inventor before: Li Jianqiang Inventor before: Jiang Long Inventor before: Lu Wei |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG ZHIMING LI JIANQIANG JIANG LONG LU WEI TO: WANG ZHIMING CENG XIANHUA JIANG LONG LU WEI |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 310004 No. 245 Dong Xin Road, Xiacheng District, Zhejiang, Hangzhou Patentee after: Xizi clean energy equipment manufacturing Co.,Ltd. Address before: 310004 No. 245 Dong Xin Road, Xiacheng District, Zhejiang, Hangzhou Patentee before: HANGZHOU BOILER GROUP Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |