CN107999928A - A kind of circular-seam welding method of water heater liner - Google Patents
A kind of circular-seam welding method of water heater liner Download PDFInfo
- Publication number
- CN107999928A CN107999928A CN201711287222.6A CN201711287222A CN107999928A CN 107999928 A CN107999928 A CN 107999928A CN 201711287222 A CN201711287222 A CN 201711287222A CN 107999928 A CN107999928 A CN 107999928A
- Authority
- CN
- China
- Prior art keywords
- welding
- stack shell
- end socket
- water heater
- circular
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
Abstract
The present invention discloses a kind of circular-seam welding method of water heater liner, and for welding the stack shell and end socket of SUS444 stainless steel inner containers, including weld port pretreatment and welding, the weld port pretreatment includes：Stack shell port to be welded is fabricated to the sloping welding point of tool；The weld port of the welding point to the stack shell and end socket carries out soak cleaning again；The welding includes the following steps：The welding point of the stack shell is inserted into the weld port of the end socket, end socket is docked with stack shell；Then argon arc welding welding is carried out using ER316L welding wires in the outside that end socket is docked with stack shell.This method before welding pre-processes stack shell weld port so that welding contraposition is simpler, greatly reduces welding difficulty；ER316L welding wires are used at the same time, is closer to SUS444 material compositions, the resistance to corrosion of weld seam can be effectively improved, prevent weld seam leak.
Description
Technical field
The present invention relates to a kind of circular-seam welding method of water heater liner, belong to welding technology field.
Background technology
The material that general water heater uses is that carbon steel adds enamel to handle liner, and additional anodic magnesium rod is arranged as anti-corrosion protection
Apply, the principle of anodic magnesium rod is to supplement substantial amounts of electronics to need metal to be protected, makes to be protected metal generally in electronics mistake
Surplus state makes metal surface each point reach same negative potential.
Magnesium rod largely reduces the corrosion of water heater liner, but magnesium rod also brings the defects of a large amount of：Magnesium
An extension of the rod as sacrificial anode, its service life are limited；Installing, magnesium rod have to liner and heating tube into
Row insulation processing, installation check are replaced inconvenient；To liner heating tube overprotection；The other impurities of magnesium rod alloy are easily formed very
More floating materials, block nozzle, influence to use.
For this reason, patent《A kind of water heater liner》(the patent No.：201220350502.3) a kind of water heater liner is provided,
Use SUS444 stainless steel inner containers instead, itself has very strong resistance to corrosion, without magnesium rod, checks and replaces conveniently.But
SUS444 stainless steels are higher to welding process requirement, leak, electrochemical corrosion etc. easily occur.
The content of the invention
The technical problem to be solved in the present invention is：Existing SUS444 stainless steel inner containers welding difficulty is high, easily occur leak,
The problems such as weld corrosion.
To solve technical problem, there is provided a kind of circular-seam welding method of water heater liner, reduces welding difficulty, weld seam resists
The advantages that corrosive power is strong, antileaking.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of circular-seam welding method of water heater liner, for welding the stack shell and end socket of SUS444 stainless steel inner containers, bag
Include weld port pretreatment and welding；
The weld port pretreatment includes：Stack shell port to be welded is fabricated to and has sloping connect
Head；The weld port of the welding point to the stack shell and end socket carries out soak cleaning again；
The welding includes the following steps：The welding point of the stack shell is inserted into the weld port of the end socket, made
End socket is docked with stack shell；Then argon arc welding welding is carried out using ER316L welding wires in the outside that end socket is docked with stack shell.
Preferably, the tungsten electrode that the argon arc welding uses is WC20 Φ 3.2mm.
Preferably, the current polarity of the argon arc welding welding uses straight polarity direct current, and current strength is in 165~210A scopes
Interior, arc voltage is in the range of 21~24V.
Preferably, the thickness of the stack shell and end socket is 2.5mm, and the current strength is described in the range of 165~175A
Arc voltage is in 21~22V.
Preferably, the thickness of the stack shell and end socket is 3.0mm, and the current strength is described in the range of 195~210A
Arc voltage is in 23~24V.
Preferably, a diameter of 1.2mm of the ER316L welding wires, speed of welding is in the range of 21~23mm/s.
Preferably, argon gas and 2% oxygen mix of the arc protecting atmosphere of the argon arc welding using 98%, gas flow
In 10~13L/min.
Preferably, the welding point of the stack shell is formed by the stack shell direct pressing, including sequentially connected inclined-plane ring,
Inner ring and guide ring；The described one end of inclined-plane ring away from inner ring is connected with stack shell；The inner ring is parallel to each other with stack shell, and inner ring
Outside diameter it is equal with the internal diameter of stack shell；The guide ring is by interior circumferential stack shell inclined.
Preferably, angle of inclination of the inclined-plane ring from stack shell to inclined is 45 degree.
Preferably, the guide ring by the angle of inclination of interior circumferential inclined at 10~15 degree.
The beneficial effects of the invention are as follows：Stack shell weld port is pre-processed before welding so that welding contraposition is simpler
It is single, greatly reduce welding difficulty；ER316L welding wires are used at the same time, is closer to SUS444 material compositions, weldering can be effectively improved
The resistance to corrosion of seam, prevents weld seam leak.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is inner container structure of water heater schematic diagram；
Fig. 2 is the welded joint structure schematic diagram of liner stack shell of the present invention；
Fig. 3 is that end socket of the present invention docks schematic diagram with stack shell；
Fig. 4 is the enlarged diagram of a-quadrant in Fig. 3；
Fig. 5 is liner and stack shell weld structure diagram.
Reference numeral：10th, stack shell；11st, welding point；111st, inclined-plane ring；112nd, inner ring；113rd, guide ring；20th, end socket；
30th, solder joint.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows composition related to the present invention.
One embodiment of the circular-seam welding method of water heater liner of the present invention, as shown in Figs. 1-5, the circular-seam welding method
For welding the stack shell 10 and end socket 20 of SUS444 stainless steel inner containers, including two steps of weld port pretreatment and welding.Its
In, weld port pretreatment includes：Above-mentioned stack shell 10 port to be welded is fabricated to the sloping welding point 11 of tool；It is right again
The welding point 11 of the stack shell 10 and the weld port of end socket 20 carry out soak cleaning；Above-mentioned welding then includes the following steps：Will
The welding point 11 of above-mentioned stack shell 10 is inserted into the weld port of end socket 20, as in Figure 3-5, makes end socket 20 and stack shell 10 right
Connect；Then argon arc welding welding is carried out using ER316L welding wires in the outside that end socket 20 is docked with stack shell 10.This method uses
ER316L welding wires, are closer to SUS444 material compositions, can effectively improve the resistance to corrosion of weld seam, prevent weld seam leak.
Preferably, for the tungsten electrode that above-mentioned argon arc welding uses for WC20 Φ 3.2mm, the current polarity of welding uses straight polarity direct current,
Current strength is in the range of 165~210A, and arc voltage is in the range of 21~24V.When the thickness of stack shell 10 and end socket 20 is
During 2.5mm, above-mentioned current strength is preferably in the range of 165~175A, arc voltage preferably 21~22V.When stack shell 10 and end socket
When 20 thickness is 3.0mm, above-mentioned current strength is preferably in the range of 195~210A, arc voltage preferably 23~24V.
The diameter of above-mentioned ER316L welding wires uses 1.2mm, and speed of welding is in the range of 21~23mm/s.The electric arc of argon arc welding
Argon gas and 2% oxygen mix of the protective gas using 98%, gas flow is in 10~13L/min.
As shown in Fig. 2, the welding point 11 of above-mentioned stack shell 10 is formed by stack shell direct pressing, including sequentially connected inclined-plane
Ring 111, inner ring 112 and guide ring 113.Wherein, the one end of inclined-plane ring 111 away from inner ring 112 is connected with stack shell 10, inner ring 112
It is parallel to each other with stack shell 10, and the outer diameter D ＇ of inner ring 112 is equal with the internal diameter d of stack shell 10；Guide ring 113 also from inner ring 112 to
10 inclined of stack shell.
As shown in Figures 3 and 4, tilt angle alpha of the inclined-plane ring 111 from stack shell 10 to inclined is 45 degree, guide ring 113
Inclination angle beta from from inner ring 112 to inclined can play good guiding role to end socket 20, make at 10~15 degree
Obtain end socket 20 and the welding contraposition of stack shell 10 is simpler quick, contraposition is more neat, greatly reduces welding difficulty.End socket 20 with
Stack shell 10 dock after, since the outer diameter D ＇ of inner ring 112 and the internal diameter d of stack shell 10 are equal so that the port outside diameter of end socket 20 and
The outer diameter D of stack shell 10 is concordant, and tilt angle alpha of the inclined-plane ring 111 from stack shell 10 to inclined is 45 degree so that stack shell 10
Junction and one groove for being used for welding of formation between the port of end socket 20, groove width and stack shell between inclined-plane ring 111
10 thickness are equal, then end socket 20 and stack shell 10 are welded with ER316L welding wires at groove, solder joint as shown in Figure 5 30
Put.
The present invention uses above-mentioned circular-seam welding method for SUS444 stainless steel inner containers so that and commissure welding quality is high,
With stronger resistance to corrosion, weld seam leak can be effectively prevented.
It is complete by above-mentioned description, relevant staff using the above-mentioned desirable embodiment according to the present invention as enlightenment
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.
Claims (10)
- A kind of 1. circular-seam welding method of water heater liner, for welding the stack shell and end socket of SUS444 stainless steel inner containers；It is special Sign is：Pre-process and weld including weld port；The weld port pretreatment includes：Stack shell port to be welded is fabricated to the sloping welding point of tool；Again The weld port of welding point and end socket to the stack shell carries out soak cleaning；The welding includes the following steps：The welding point of the stack shell is inserted into the weld port of the end socket, makes end socket Docked with stack shell；Then argon arc welding welding is carried out using ER316L welding wires in the outside that end socket is docked with stack shell.
- 2. the circular-seam welding method of water heater liner according to claim 1, it is characterised in that：What the argon arc welding used Tungsten electrode is WC20 Φ 3.2mm.
- 3. the circular-seam welding method of water heater liner according to claim 2, it is characterised in that：The argon arc welding welding Current polarity uses straight polarity direct current, and current strength is in the range of 165~210A, and arc voltage is in the range of 21~24V.
- 4. the circular-seam welding method of water heater liner according to claim 3, it is characterised in that：The stack shell and end socket Thickness is 2.5mm, and the current strength is in the range of 165~175A, and the arc voltage is in 21~22V.
- 5. the circular-seam welding method of water heater liner according to claim 3, it is characterised in that：The stack shell and end socket Thickness is 3.0mm, and the current strength is in the range of 195~210A, and the arc voltage is in 23~24V.
- 6. the circular-seam welding method of water heater liner according to claim 1, it is characterised in that：The ER316L welding wires A diameter of 1.2mm, speed of welding is in the range of 21~23mm/s.
- 7. the circular-seam welding method of water heater liner according to claim 1, it is characterised in that：The electric arc of the argon arc welding Argon gas and 2% oxygen mix of the protective gas using 98%, gas flow is in 10~13L/min.
- 8. according to the circular-seam welding method of claim 1-7 any one of them water heater liners, it is characterised in that：The stack shell Welding point formed by the stack shell direct pressing, including sequentially connected inclined-plane ring, inner ring and guide ring；The inclined-plane ring One end away from inner ring is connected with stack shell；The inner ring is parallel to each other with stack shell, and the outside diameter of inner ring is equal with the internal diameter of stack shell； The guide ring is by interior circumferential stack shell inclined.
- 9. the circular-seam welding method of water heater liner according to claim 8, it is characterised in that：The inclined-plane ring is by stack shell It it is 45 degree to the angle of inclination of inclined.
- 10. the circular-seam welding method of water heater liner according to claim 8, it is characterised in that：The guide ring is by interior The angle of inclination of circumferential inclined is at 10~15 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711287222.6A CN107999928A (en) | 2017-12-07 | 2017-12-07 | A kind of circular-seam welding method of water heater liner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711287222.6A CN107999928A (en) | 2017-12-07 | 2017-12-07 | A kind of circular-seam welding method of water heater liner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107999928A true CN107999928A (en) | 2018-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711287222.6A Pending CN107999928A (en) | 2017-12-07 | 2017-12-07 | A kind of circular-seam welding method of water heater liner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668325A (en) * | 2019-01-30 | 2019-04-23 | 李晓琳 | A kind of water heater liner |
| CN111633299A (en) * | 2020-05-15 | 2020-09-08 | 上海石化机械制造有限公司 | Manufacturing process of pressure container and welding workbench |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202692423U (en) * | 2012-07-19 | 2013-01-23 | 苏州巨浪热水器有限公司 | Inner container of water heater |
| CN105252120A (en) * | 2015-11-19 | 2016-01-20 | 安徽大盘特种装备车辆有限公司 | Circular seam welding method for stainless steel gas cylinder liner |
| CN105546824A (en) * | 2016-02-25 | 2016-05-04 | 大连希奥特阳光能源科技有限公司 | Ferritic stainless steel inner container |
-
2017
- 2017-12-07 CN CN201711287222.6A patent/CN107999928A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202692423U (en) * | 2012-07-19 | 2013-01-23 | 苏州巨浪热水器有限公司 | Inner container of water heater |
| CN105252120A (en) * | 2015-11-19 | 2016-01-20 | 安徽大盘特种装备车辆有限公司 | Circular seam welding method for stainless steel gas cylinder liner |
| CN105546824A (en) * | 2016-02-25 | 2016-05-04 | 大连希奥特阳光能源科技有限公司 | Ferritic stainless steel inner container |
Non-Patent Citations (1)
| Title |
|---|
| 林克伟等: "太阳能保温水箱内胆A焊缝的焊接", 《热加工工艺》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668325A (en) * | 2019-01-30 | 2019-04-23 | 李晓琳 | A kind of water heater liner |
| CN111633299A (en) * | 2020-05-15 | 2020-09-08 | 上海石化机械制造有限公司 | Manufacturing process of pressure container and welding workbench |
| CN111633299B (en) * | 2020-05-15 | 2022-01-07 | 上海石化机械制造有限公司 | Manufacturing process of pressure container |
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Application publication date: 20180508 |