CN203265843U - Combination of welding backing, fusible embedded strip and conducting rod - Google Patents
Combination of welding backing, fusible embedded strip and conducting rod Download PDFInfo
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- CN203265843U CN203265843U CN 201320208991 CN201320208991U CN203265843U CN 203265843 U CN203265843 U CN 203265843U CN 201320208991 CN201320208991 CN 201320208991 CN 201320208991 U CN201320208991 U CN 201320208991U CN 203265843 U CN203265843 U CN 203265843U
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- backing
- fusible
- welding backing
- filler rod
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Abstract
The utility model belongs to the field of welding, and particularly relates to a combination of a welding backing, a fusible embedded strip and a conducting rod. The combination comprises the welding backing with a groove in the top, the fusible embedded strip and the conducting rod, wherein the fusible embedded strip which is made of chemical components and matched with a welding part is arranged above the groove in the top of the welding backing, and the conducting rod is connected with the fusible embedded strip. In welding, the fusible embedded strip is arranged between truncated edges of a welding groove of the pipeline welding part, the welding backing is arranged on the back face of the welding groove, and the fusible embedded strip or the bottom of the welding groove is directly connected with a welding power source through the conducting rod to form a welding current loop. The combination can reduce the precision requirement for machining and assembly of the welding groove, reduce production cost and ensure the stable welding quality.
Description
Technical field
The utility model belongs to welding field, is specifically related to the combination of a kind of welding backing, fusible filler rod and conducting rod.
Background technology
Pipeline welding often need to first be carried out backing welding and connect, and the total quality of the quality butt welded seam of bottoming welding and the normal operation of equipment have material impact under many circumstances.In nuclear power plant's nuclear island, the existing backing welding connection technology of vitals such as a primary loop piping, fluctuation pipe often adopts gas tungstun arc welding, several bevel for welding designs when gas tungstun arc welding is adopted for the bottoming welding in Fig. 1-1 to Fig. 1-4.Fig. 1-1 is usually used in the manual tungsten electrode gas shielded arc welding; its shortcoming is that welding efficiency is low; the welder will control melting pool shape meticulously; electric current is less than normal easily causes the defectives such as lack of penetration; the defective such as electric current is excessive easily produces burn-through or overlap, subside; thereby high to the requirement of welder's operative skill, cause labour cost higher.Fig. 1-2 is used for automatic gas tungstun arc welding, its shortcoming is very high to bevel for welding processing and assembling precision requirement, in the situation that installing, a primary loop piping needs to adopt high-precision 3-d laser measurement technology and Computerized Numerical Control processing technology, increased difficulty of construction, the production cost expense is significantly improved; Although fill silk when welding in addition but can produce certain alloying element scaling loss by the root face mother metal from the molten root pass that forms, easily cause Weld Performance that certain decline is arranged.Fig. 1-3 uses copper liner 1, shortcoming is that weld metal can produce certain copper phenomenon of oozing, and is taboo and strict restriction in nuclear island equipment.Fig. 1-4 uses stainless steel liner 1, and shortcoming is that the stainless steel liner that postwelding need to connect weldering is removed, and construction volume is larger, easily damages inner-walls of duct.Produce the unstable problems such as appearance of weld is bad, quality fluctuation that cause of arc blow when above-mentioned several background technology also has in addition.Only have Fig. 1-1 in the nuclear island engineering-built at present, the scheme of Fig. 1-2 obtains a large amount of practical applications; Fig. 1-3, the scheme of Fig. 1-4 have no or seldom use.Comprehensive, the shortcoming of above-mentioned prior art is that efficient is low, and cost, expense are higher.
The utility model content
The purpose of this utility model is the defective for prior art, and the combination of the welding backing that a kind of cost is low and quality is easy to control, fusible filler rod and conducting rod is provided.
The technical solution of the utility model is as follows: the combination of a kind of welding backing, fusible filler rod and conducting rod, comprise that the top establishes reeded welding backing, and be provided with the fusible filler rod made from the chemical composition of weldment coupling above the top groove of welding backing; During welding, described fusible filler rod is arranged between the bevel for welding root face of pipeline welding part, and described welding backing is arranged on the bevel for welding back side, and fusible filler rod or bevel for welding bottom are connected by conducting rod with the source of welding current, formation welding current loop.
Further, the combination of welding backing as above, fusible filler rod and conducting rod, wherein, described welding backing comprises tray, and the pad that is embedded in tray top, described top groove is arranged on pad.
Further, the combination of welding backing as above, fusible filler rod and conducting rod, wherein, described welding backing is provided with the gas passage that runs through top and bottom, and described gas passage extends in the bottom of welding backing the ozzle that becomes projection.
Further, the combination of welding backing as above, fusible filler rod and conducting rod, wherein, the described welding backing welding backing group that several welding backings unit forms of serving as reasons; Part welding backing unit has the gas passage that runs through top and bottom in the welding backing group.
The beneficial effects of the utility model are as follows: adopt the combination of welding backing of the present utility model, fusible filler rod and conducting rod, compare with original technology, owing to adopting relatively wide bevel for welding gap, thereby can reduce bevel for welding processing and assembling precision requirement, for example can save and adopt high-precision 3-d laser measurement technology and accurate digital control process technology, thereby the corresponding production cost that reduced.Add mother metal with backing run in original technology by silk filling and compare from molten formation, the fusible filler rod in the utility model can adopt with the chemical composition of mother metal coupling can guarantee that more welding rear Weld Performance meets the requirements.
When using the utility model bottoming welding, fusible filler rod or groove bottom or welded the root pass of completing formation by completing with the conducting rod of the external insulating sleeve of mechanical fastening device and being connected of the source of welding current, avoid common arc blow on can be largely, disorderly, make electric arc keep stable, be conducive to form high-quality backing weld seam.
Description of drawings
Fig. 1-1 be the bevel for welding group of manual tungsten electrode gas shielded arc welding in background technology to schematic diagram, the root face gap is the 0-3 millimeter;
Fig. 1-2 is that in background technology, automatically the bevel for welding group of gas tungstun arc welding is to schematic diagram, and the root face gap is the 0-1 millimeter;
Fig. 1-3 are to use the bevel for welding schematic diagram of copper liner in background technology;
Fig. 1-4 are the bevel for welding schematic diagram that uses the stainless steel liner in background technology, and the root face gap is the 0-3 millimeter;
Fig. 2-1 is a kind of welding backing cell schematics;
Fig. 2-2 are combined welding backing cell schematics;
Fig. 2-3 are for being provided with passage welding backing unit (monolithic devices) schematic diagram;
Fig. 2-4 are provided with passage welding backing unit (combined) schematic diagram;
Fig. 2-5 are for being provided with the vertical section schematic diagram of passage welding backing unit (monolithic devices);
Fig. 3 is a kind of welding backing group, and the part welding backing is provided with passage, and the part welding backing is without passage;
Fig. 4-1 is a kind of welding backing-fusible filler rod combination schematic diagram, and fusible filler rod cross section is rectangle;
Fig. 4-2 are a kind of welding backing-fusible filler rod combination schematic diagram, and fusible filler rod cross section is circular;
Fig. 4-3 are a kind of welding backing-fusible filler rod combination schematic diagram, and fusible filler rod cross section is oblate;
Fig. 5 is a kind of welding backing group-fusible filler rod combination schematic diagram, and welding backing is without passage;
Fig. 6-1 is welding backing-fusible filler rod combination scheme of installation, and the fusible filler rod of its rectangle is between the bevel for welding root face;
Fig. 6-2 are welding backing-fusible filler rod combination scheme of installation, and its circular fusible filler rod is between the bevel for welding root face;
Fig. 6-3 are welding backing-fusible filler rod combination scheme of installation, and its oblate fusible filler rod is between the bevel for welding root face;
Fig. 6-4 are that fusible filler rod is through conducting rod and source of welding current connection diagram;
Fig. 7 is the welding circuit schematic diagram;
Fig. 8 for welded complete formation root pass through conducting rod and source of welding current connection diagram;
Fig. 9 is conducting rod fixture structure schematic diagram;
When Figure 10 is welding, fusible filler rod fusing consists of a part of schematic diagram of weld metal;
Figure 11 is that welding backing-bevel for welding forms protection gas access diagram between the back side.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
The combination of welding backing provided by the utility model, fusible filler rod and conducting rod, comprise that the top is provided with the welding backing 2 of groove 3, as shown in Fig. 2-1, be provided with fusible filler rod above the top groove 3 of welding backing, fusible filler rod metal can be selected and guarantee to weld rear Weld Performance with the chemical composition of weldment coupling and meet the requirements.
As Fig. 4-1, Fig. 4-2, Fig. 4-3, the cross section of fusible filler rod 6 can be selected as required, as rectangle, and one of shape such as circular or oblate.
Fig. 2-1 is a kind of welding backing unit, can be made by exotic material (as pottery) etc., and structure can be combined (as Fig. 2-2) or monolithic devices (as Fig. 2-1) on demand.When the welding backing unit is combined, as shown in Fig. 2-2, the pad 22 that comprises tray 21 and be embedded in tray 21 tops, described top groove 3 is arranged on pad 22.
The welding backing unit can be provided with passage (as Fig. 2-3, Fig. 2-4, Fig. 2-5) or not establish passage.When passage was set, welding backing 2 was provided with the gas passage 4 that runs through top and bottom, and described gas passage 4 extends in the bottom of welding backing the ozzle 5 that becomes projection.
Fig. 3 is a kind of welding backing group that the welding backing unit forms, and part welding backing unit has the gas passage that runs through top and bottom in the welding backing group.Be respectively several welding backings-fusible filler rod combination examples shown in Fig. 4-1, Fig. 4-2, Fig. 4-3.Fig. 5 be welding backing during without passage a kind of welding backing group and the combination of fusible filler rod.
Before weldering the bevel for welding group to the time, adopt relatively wide bevel for welding gap, use the combination of above-mentioned welding backing group and fusible filler rod, difference according to the fusible filler rod cross section of selecting, the setting of welding backing and the combination of fusible filler rod can be as shown in one of Fig. 6-1, Fig. 6-2 or Fig. 6-3, fusible filler rod 6 between bevel for welding 7 root faces, fusible filler rod 6 the plurality of specifications size can be arranged in case coordinate 7 groups of actual welding grooves to the time various root faces gap and the width of root face that may run into.Welding backing is fixed on the bevel for welding back side by adhesive tape or mechanical device.Fusible filler rod 6 can be connected by conducting rod 8 with the source of welding current, as shown in Fig. 6-4.
The starting the arc on fusible filler rod during welding, in the situation that gas shielded arc welding, according to circumstances difference can be selected to fill silk or the welding that do not fill silk, fusible filler rod connects and composes the welding current loop as shown in Figure 7 through conducting rod and the source of welding current at this moment.In Fig. 7, two segment pipes 9 are oppositely arranged, and conducting rod 8 directly connects welding machine 10.After a period of time is carried out in welding, type of attachment shown in Fig. 6-4 can be changed to and shown in Figure 8ly complete the root pass 11 that forms and directly be connected with the source of welding current by welding, still consist of the welding current loop as shown in Figure 7.Fusible filler rod 6 or welded being connected by the conducting rod 8 of the external insulating sleeve with mechanical fastening device shown in Figure 9 of the root pass 11 of completing formation and the source of welding current and completed.This mechanical fastening device can compress conducting rod and make it with fusible filler rod or welded the root pass of completing formation to contact conduction well.External insulating sleeve can be avoided stablizing of conducting rod 8 and the unexpected Contact Effect welding current of bevel for welding sidewall loop.During welding, the cross sectional dimensions of the fusible filler rod of choose reasonable melts it fully and is combined good formation root pass 11 with mother metal as shown in figure 10, can use larger electric current suitably to increase the heat input for this reason, this moment, welding backing 2 played the effect that shaping is set off at the welding bead back side, guarantee that the weld metal back-welding shape is good and in smoothing junction with mother metal, avoids producing the defectives such as burn-through or overlap.After bottoming welding or whole welding finish, welding backing and conducting rod are removed.
The below is described in detail the method for the utility model bottoming welding, comprises the steps:
(S1) before weldering the bevel for welding group to the time, adopt relatively wide bevel for welding gap, the fusible filler rod suitable according to the bevel for welding Interval selecting.
(S2) at the sub-assembly of the bevel for welding bottom fusible filler rod of installation and welding backing, as required, can select to be provided with the welding backing of passage as shown in Fig. 2-3, Fig. 2-4; Or select welding backing without passage as shown in Fig. 2-1, Fig. 2-2.Welding backing is fixed on the bevel for welding back side by adhesive tape or mechanical device.According to the difference of the fusible filler rod cross section of selecting, welding backing can be as shown in one of Fig. 4-1, Fig. 4-2 or Fig. 4-3 with the setting that fusible filler rod makes up, fusible filler rod between the bevel for welding root face as shown in one of Fig. 6-1, Fig. 6-2 or Fig. 6-3; Fusible filler rod the plurality of specifications size can be arranged in case coordinate actual welding groove group to the time the various root faces gap that may run into.
(S3) directly be connected by conducting rod with the source of welding current bottom fusible filler rod or groove, fusible filler rod directly is connected as shown in Fig. 6-4 by conducting rod with the source of welding current; When needing, can first protect gas passage and protection air cushion as shown in figure 11 by passage input and output protection gas in bevel for welding back side formation before weldering; Protection gas can be inert gas, as argon gas, or other gas such as carbon dioxide, various mists etc.; What Figure 11 showed is a pipeline configuration, and the welding backing of installation and the groove back side and fusible filler rod consist of closed cavity, but welding backing has vent cap input and output protection gas.
(S4) when welding starting the arc on fusible filler rod, this moment fusible filler rod or groove bottom and the source of welding current directly connect and compose the welding current loop as shown in Figure 7 by conducting rod.
(S5) after a period of time is carried out in welding, shown in Figure 8ly to complete the root pass that forms and directly be connected with the source of welding current by conducting rod by welding connecting shown in Fig. 6-4 to change to, formation welding current loop is as shown in Figure 7.Fusible filler rod or welded being connected by the conducting rod of the external insulating sleeve with mechanical fastening device shown in Figure 9 of the root pass of completing formation and the source of welding current and completed.The cross sectional dimensions of the fusible filler rod of choose reasonable melts when making its welding and is combined good formation root pass with mother metal as shown in figure 10.Can use suitable electric current, this moment, welding backing assisted to play the effect that shaping is set off at the welding bead back side, guaranteed that the weld metal back-welding shape is good for this reason, the defective such as avoid producing burn-through or overlap, subside.
(S6) after bottoming welding or whole welding finish, welding backing and conducting rod are removed.
Obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model the utility model.Like this, if of the present utility model these are revised and within modification belongs to the scope of the utility model claim and equivalent technology thereof, the utility model also is intended to comprise these changes and modification interior.
Claims (4)
1. the combination of a welding backing, fusible filler rod and conducting rod, it is characterized in that: comprise that the top establishes reeded welding backing (2), be provided with in top groove (3) top of welding backing (2) the fusible filler rod (6) made from the chemical composition of weldment coupling; During welding, described fusible filler rod (6) is arranged between the bevel for welding root face (7) of pipeline welding part, described welding backing (2) is arranged on the bevel for welding back side, and fusible filler rod (6) or bevel for welding bottom are connected by conducting rod (8) with the source of welding current, formation welding current loop.
2. the combination of welding backing as claimed in claim 1, fusible filler rod and conducting rod, it is characterized in that: described welding backing (2) comprises tray (21), and the pad (22) that is embedded in tray (21) top, described top groove (3) is arranged on pad (22).
3. the combination of welding backing as claimed in claim 1 or 2, fusible filler rod and conducting rod, it is characterized in that: described welding backing (2) is provided with the gas passage (4) that runs through top and bottom, and described gas passage (4) extends in the bottom of welding backing the ozzle (5) that becomes projection.
4. the combination of welding backing as claimed in claim 1, fusible filler rod and conducting rod is characterized in that: described welding backing (2) the welding backing group that several welding backings unit forms of serving as reasons; Part welding backing unit has the gas passage that runs through top and bottom in the welding backing group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320208991 CN203265843U (en) | 2013-04-23 | 2013-04-23 | Combination of welding backing, fusible embedded strip and conducting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320208991 CN203265843U (en) | 2013-04-23 | 2013-04-23 | Combination of welding backing, fusible embedded strip and conducting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203265843U true CN203265843U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320208991 Expired - Fee Related CN203265843U (en) | 2013-04-23 | 2013-04-23 | Combination of welding backing, fusible embedded strip and conducting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203265843U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514069A (en) * | 2016-12-06 | 2017-03-22 | 上海航天设备制造总厂 | Device inhibiting welding defects of small-diameter aluminum alloy guiding pipe |
-
2013
- 2013-04-23 CN CN 201320208991 patent/CN203265843U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514069A (en) * | 2016-12-06 | 2017-03-22 | 上海航天设备制造总厂 | Device inhibiting welding defects of small-diameter aluminum alloy guiding pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20190423 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |