CN203945003U - A kind of welding point for cast steel steel pipe and hot finished steel pipe butt weld - Google Patents
A kind of welding point for cast steel steel pipe and hot finished steel pipe butt weld Download PDFInfo
- Publication number
- CN203945003U CN203945003U CN201420389000.0U CN201420389000U CN203945003U CN 203945003 U CN203945003 U CN 203945003U CN 201420389000 U CN201420389000 U CN 201420389000U CN 203945003 U CN203945003 U CN 203945003U
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- steel pipe
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- steel
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- cast steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 90
- 239000010959 steel Substances 0.000 title claims abstract description 90
- 238000003466 welding Methods 0.000 title claims abstract description 56
- 229910001208 Crucible steel Inorganic materials 0.000 title claims abstract description 51
- 230000007704 transition Effects 0.000 claims abstract description 7
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The utility model discloses a kind of welding point for cast steel steel pipe and hot finished steel pipe butt weld, comprise the welding point position being formed by cast steel steel pipe and hot finished steel pipe welding ends, described welding point position comprises that described cast steel steel pipe and hot finished steel pipe are at two grooves of welding ends, also comprise the backing plate that is extended to hot finished steel pipe internal diameter by the welding ends of described cast steel steel pipe, the top of described backing plate equals the wall thickness of described hot finished steel pipe to the distance of described cast steel outer diameter of steel pipes, the bottom of described backing plate is gradient transition to the internal diameter of described cast steel steel pipe.The utility model has the advantages that: can reduce welding difficulty, reduce the residual stress that stress is concentrated and welding produces of welding position, effectively improve the fatigue behaviour under reciprocating load, reduce weld reinforcement, make welding product obtain better appearance effect.
Description
Technical field
The utility model relates to the Type of Welding of a kind of cast steel steel pipe and hot finished steel pipe, welding point when in particular, the utility model is applicable in the fields such as large-span steel, bridge, ocean platform that the larger cast steel steel pipe hot finished steel pipe butt weld less with wall thickness of wall thickness is connected.
Background technology
In existing < < Code for design of steel structures > > (GB50017-2003), only the fatigue problem of member has been adopted to allowable stress method analysis, but the fatigue problem at Member Welding place has not been claimed; And in < < cast steel steel pipe application technology rules > > (CECS235:2008), although proposed the application form of several cast steel steel pipes, the fatigue problem of cast steel steel pipe and welding position thereof do not analyzed, calculated and illustrates; The most frequently used < < welding handbook > >, standard is made in the welding procedure that does not also have butt welded seam both sides wall thickness to differ larger.
Those skilled in the art are known, for the soldered of cast steel steel pipe and hot finished steel pipe, fetch, even if cast steel steel pipe is identical with the external diameter of hot finished steel pipe, but because the wall thickness of cast steel steel pipe is greater than the wall thickness of hot finished steel pipe, therefore when the thickness of bi-material differs larger, be easy to cause the inhomogeneous of weld geometry, and cause the finished product after welding obviously to have residual stress and weld defect, cause near the residual tension of base metal weld seam often to reach the yield point of steel, and the most responsive region of formation and development fatigue crack just, this position.
In sum, at present in engineering and the fatigue problem that all reckons without cast steel steel-pipe welding place in aforementioned various design specification, technical regulation and welding handbook, and the existence of this blank is that the weldment that cast steel steel pipe and hot finished steel pipe are formed by connecting cannot meet the key factor that under reciprocating load, engineering requires.
Utility model content
The purpose of this utility model overcomes the above problems exactly, and a kind of welding point for cast steel steel pipe and hot finished steel pipe butt weld is provided for this reason.
The technical solution of the utility model is:
A kind of welding point for cast steel steel pipe and hot finished steel pipe butt weld, comprise the welding point position being formed by cast steel steel pipe and hot finished steel pipe welding ends, described welding point position comprises that described cast steel steel pipe and hot finished steel pipe are at two grooves of welding ends, also comprise the backing plate that is extended to hot finished steel pipe internal diameter by the welding ends of described cast steel steel pipe, the top of described backing plate equals the wall thickness of described hot finished steel pipe to the distance of described cast steel outer diameter of steel pipes, the bottom of described backing plate is gradient transition to the internal diameter of described cast steel steel pipe.
The bottom gap of two described grooves is 6mm, and the angle between two described grooves is 45 °.
The thickness of described backing plate is 4～6mm, and the length of described backing plate is 20～30mm.
Described backing plate bottom is 1:6～1:5 to the inclination ratio of described cast steel pipe diameter gradient transition.
The beneficial effects of the utility model are:
(1) setting of groove and backing plate, can reduce welding difficulty, and reduces the residual stress that stress is concentrated and welding produces of welding position;
The reasonable setting of angle and back plate sizes and gradient transition inclination ratio between (2) two groove bottom gaps, two grooves, the stress that can further reduce weld is concentrated, and stress is seamlessly transitted, and effectively improves the fatigue behaviour under reciprocating load.
Accompanying drawing explanation
Fig. 1, Fig. 2 are respectively the enlarged drawings at structural representation of the present utility model and welding point position.
Mark in figure: 1-cast steel steel pipe, 2-hot finished steel pipe, 3-welding point position, 4-groove, 5-backing plate.
The specific embodiment
For the utility model is more easily understood, below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail:
With reference to Fig. 1, the utility model is for the welding point of cast steel steel pipe and hot finished steel pipe butt weld, and its structure comprises the welding point position 3 that the welding ends by cast steel steel pipe 1 and hot finished steel pipe 2 forms, and described welding point position 3 consists of groove 4 and backing plate 5.
Described groove 4 comprises cast steel steel pipe 1 and two grooves of hot finished steel pipe 2 in weld seam junction, and the gap size of two groove bottoms is 6mm, and the angle α between two grooves is 45 °;
Described backing plate 5 forms by the welding ends machining of cast steel steel pipe 1 and through polishing, and its gauge is 4～6mm, and the state of its length dimension during according to welding need to be selected between 20～30mm;
The bottom of described backing plate 5 is gradient transition to the interior warp of described cast steel steel pipe 1, and the inclination ratio of this gradient is 1:6～1:5.
Adopt the method for the utility model docking cast steel steel pipe and hot finished steel pipe to comprise the following steps:
(1) the cast steel steel pipe described in monoblock cast 1 and described hot finished steel pipe 2, the residual stress the convenient welding that in order to reduce flame cutting, bring should be reserved groove 4 and backing plate 5, and make the requirement in its satisfied casting standard when monoblock cast;
(2) groove 4 of machining polish described hot finished steel pipe 2, welding ends;
(3) groove 4 and the backing plate 5 of machining polish described cast steel steel pipe 1, welding ends, and require described backing plate 5 tops to the distance of described cast steel steel pipe 1 external diameter, to equal the wall thickness of described hot finished steel pipe 2, so that the weld seam after welding is tending towards smooth; In order further to reduce the stress of weld, concentrate, also should make described backing plate 5 bottoms as far as possible less than normal between 1:6～1:5 to the inclination ratio of described cast steel steel pipe 1 internal diameter;
(4) carry out described cast steel steel pipe 1 and be connected with the butt weld of described hot finished steel pipe 2, and when welding, adopt the mode of multilayer weld, continuous sequence, to reduce weld reinforcement as far as possible.
In said method, the casting of described cast steel steel pipe 1, the machining of described hot finished steel pipe 2, polishing and welding operation, and the reserved setting of groove 4 and backing plate 5 all should meet the existing < < of China Engineering Construction Standardization Association cast steel node application technology rules > > (CECS235:2008), the codes and standards of < < construction steel structure solder technology rules > > (JGJ81-2002) and < < during welding for steel structure standard > > (GB50661-2011).
With reference to drawings and Examples, the technical solution of the utility model is schematically described above, this description does not have restricted.Those skilled in the art will be understood that structure, all slight modifications in actual applications of shape of butt weld welding point in the utility model, and other staff also may make the design similar to the utility model under its enlightenment.Special needs to be pointed out is: only otherwise depart from design aim of the present utility model, all apparent changes or similar Design, within being all included in protection domain of the present utility model.
Claims (5)
1. the welding point for cast steel steel pipe and hot finished steel pipe butt weld, comprise the welding point position being formed by cast steel steel pipe and hot finished steel pipe welding ends, it is characterized in that: described welding point position comprises that described cast steel steel pipe and hot finished steel pipe are at two grooves of welding ends and the backing plate that is extended to hot finished steel pipe internal diameter by the welding ends of described cast steel steel pipe, the top of described backing plate equals the wall thickness of described hot finished steel pipe to the distance of described cast steel outer diameter of steel pipes, the bottom of described backing plate is gradient transition to the internal diameter of described cast steel steel pipe.
2. the welding point for cast steel steel pipe and hot finished steel pipe butt weld according to claim 1, is characterized in that: the bottom gap of two described grooves is 6mm.
3. the welding point for cast steel steel pipe and hot finished steel pipe butt weld according to claim 1, is characterized in that: the angle between two described grooves is 45 °.
4. the welding point for cast steel steel pipe and hot finished steel pipe butt weld according to claim 1, is characterized in that: the thickness of described backing plate is 4～6mm, and the length of described backing plate is 20～30mm.
5. the welding point for cast steel steel pipe and hot finished steel pipe butt weld according to claim 1, is characterized in that: described backing plate bottom is 1:6～1:5 to the inclination ratio of described cast steel pipe diameter gradient transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420389000.0U CN203945003U (en) | 2014-07-14 | 2014-07-14 | A kind of welding point for cast steel steel pipe and hot finished steel pipe butt weld |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420389000.0U CN203945003U (en) | 2014-07-14 | 2014-07-14 | A kind of welding point for cast steel steel pipe and hot finished steel pipe butt weld |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203945003U true CN203945003U (en) | 2014-11-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420389000.0U Expired - Lifetime CN203945003U (en) | 2014-07-14 | 2014-07-14 | A kind of welding point for cast steel steel pipe and hot finished steel pipe butt weld |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203945003U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148819A (en) * | 2014-07-14 | 2014-11-19 | 天津大学 | Welding method and welding joint for butt weld of cast steel pipe and hot rolled steel pipe |
| CN104889621A (en) * | 2015-06-05 | 2015-09-09 | 无锡阳工机械制造有限公司 | Steel bar welding technology |
| CN107127452A (en) * | 2017-06-27 | 2017-09-05 | 东莞市纳百川电子科技有限公司 | A kind of metal welding procedure |
| CN108465918A (en) * | 2018-06-01 | 2018-08-31 | 江阴市三和重工钢制品有限公司 | The butt-joint process of different wall thickness steel pipe |
| CN111877550A (en) * | 2020-06-17 | 2020-11-03 | 东南大学 | Welding connection structure and connection method of cast steel nodes |
-
2014
- 2014-07-14 CN CN201420389000.0U patent/CN203945003U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148819A (en) * | 2014-07-14 | 2014-11-19 | 天津大学 | Welding method and welding joint for butt weld of cast steel pipe and hot rolled steel pipe |
| CN104889621A (en) * | 2015-06-05 | 2015-09-09 | 无锡阳工机械制造有限公司 | Steel bar welding technology |
| CN107127452A (en) * | 2017-06-27 | 2017-09-05 | 东莞市纳百川电子科技有限公司 | A kind of metal welding procedure |
| CN108465918A (en) * | 2018-06-01 | 2018-08-31 | 江阴市三和重工钢制品有限公司 | The butt-joint process of different wall thickness steel pipe |
| CN111877550A (en) * | 2020-06-17 | 2020-11-03 | 东南大学 | Welding connection structure and connection method of cast steel nodes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141119 |