CN105215519A - The welding method of DHV type weld seam - Google Patents
The welding method of DHV type weld seam Download PDFInfo
- Publication number
- CN105215519A CN105215519A CN201510742818.5A CN201510742818A CN105215519A CN 105215519 A CN105215519 A CN 105215519A CN 201510742818 A CN201510742818 A CN 201510742818A CN 105215519 A CN105215519 A CN 105215519A
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- Prior art keywords
- groove
- weld
- side weld
- back chipping
- welding
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Classifications
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- 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
-
- 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
Abstract
The invention provides a kind of welding method of DHV type weld seam, be applied to welding single-piece, the groove of the first side weld of described welding single-piece and the groove of the second side weld are unsymmetric structure, the angle of the groove of described first side weld is less than the angle of the groove of described second side weld, and the degree of depth of the groove of described first side weld is greater than the degree of depth of the groove of described second side weld; Described method comprises: weld described first side weld; Wherein, the angle of the groove of described first side weld is more than or equal to 50 °, and is less than or equal to 60 °; After having been welded by described first side weld, back chipping and back chipping Liquid penetrant testing are carried out to described second side weld; When described back chipping Liquid penetrant testing is qualified, the second side weld after welding back chipping.The welding method of the DHV type weld seam that the embodiment of the present invention provides, can effectively ensure back chipping quality and welding quality.
Description
Technical field
The embodiment of the present invention relates to solder technology, particularly relates to the welding method of a kind of double bevel groove docking (Doublebevelbutt, DoubleHV are called for short DHV) type weld seam.
Background technology
In underground railway track vehicle, the hitch panel leading slow composition generally adopts DHV type weld seam to carry out assembling and welding with between upper cover plate and lower cover.
DHV type weld seam conventional mostly at present is the welding line structure of double-sided symmetrical.Fig. 1 is the structural representation of the DHV type weld seam of prior art.As shown in Figure 1, welding line structure between hitch panel 1 and upper cover plate 3 is symmetrical DHV type, namely the bevel angle of weld seam 2 and weld seam 4 is equal, such as, if hitch panel thickness of slab t=25mm, corresponding weld seam 2 and weld seam 4 are 12.5HV/12.5HV, and root face p=1mm, then both sides bevel angle is α=60 °.When butt welded seam welds, first weld the weld seam of either side, after this side weld has welded, back chipping and back chipping Liquid penetrant testing are carried out to this weld seam back (i.e. the weld seam of opposite side), after back chipping Liquid penetrant testing is qualified, welds the weld seam after back chipping, such as, first welded seam 2, after having been welded by weld seam 2, butt welded seam 4 has carried out back chipping, welded seam 4 after back chipping Liquid penetrant testing is qualified.
The DHV type weld joint welding process of prior art is adopted easily to occur following problem:
1, during back chipping, because the bevel angle of back chipping side weld is less, the accessibility of straight grinder is restricted, thus it is not thorough to cause weld seam interlayer to clear up, and leaves impurity, easily occur the weld defects such as lack of inter-run fusion when causing again welding in weld seam inside.
The bevel angle of the weld seam 2, after back chipping is less, do not reach the requirement of bevel angle within 50 ° ~ 60 ° scopes of the weld seam required in EN15085-3 standard, thus cause the more difficult contact groove root of welding arc and groove upper surface, therefore, easily produce incomplete fusion at the root of weld and weld seam upper surface, and welding residual stress dispersion is uneven, make weldquality poor, weld strength reduces.
Therefore, the welding quality after adopting the DHV type weld joint welding process of prior art effectively can not ensure back chipping quality and back chipping.
Summary of the invention
The embodiment of the present invention provides a kind of welding method of DHV type weld seam, effectively ensures back chipping quality and the welding quality of DHV type weld joint welding process.
The embodiment of the present invention provides a kind of welding method of DHV type weld seam, be applied to welding single-piece, the groove of the first side weld of described welding single-piece and the groove of the second side weld are unsymmetric structure, the angle of the groove of described first side weld is less than the angle of the groove of described second side weld, and the degree of depth of the groove of described first side weld is greater than the degree of depth of the groove of described second side weld; Described method comprises:
Weld described first side weld; Wherein, the angle of the groove of described first side weld is more than or equal to 50 °, and is less than or equal to 60 °;
After having been welded by described first side weld, back chipping and back chipping Liquid penetrant testing are carried out to described second side weld;
When described back chipping Liquid penetrant testing is qualified, the second side weld after welding back chipping.
Further, in the welding method of above-mentioned DHV type weld seam, the ratio of the degree of depth of the degree of depth of the groove of described second side weld and the groove of described first side weld is more than or equal to 1:4, and is less than or equal to 1:2.
Further, in the welding method of above-mentioned DHV type weld seam, degree of depth s1 '=s2+q+p of the groove of the second side weld after described back chipping, wherein, s2 is the degree of depth of the groove of the second side weld before back chipping, and q is the back chipping degree of depth, and p is the length of the root face of described welding single-piece.
Further, in the welding method of above-mentioned DHV type weld seam, the length p of described root face is more than or equal to 1mm, and is less than or equal to 2mm.
Further, in the welding method of above-mentioned DHV type weld seam, the angle of the groove of the second side weld after described back chipping is more than or equal to 50 °, and is less than or equal to 60 °.
Further, in the welding method of above-mentioned DHV type weld seam, sheet material or the section bar thickness of described welding single-piece are more than or equal to 12mm, and are less than or equal to 35mm.
The welding method of the DHV type weld seam that the embodiment of the present invention provides, first weld the first side weld, after having been welded by the first side weld, back chipping and back chipping Liquid penetrant testing are carried out to the second side weld, when the result of back chipping Liquid penetrant testing meets standard-required, the second side weld after welding back chipping.Because the groove of the first side weld and the groove of the second side weld that weld single-piece are unsymmetric structure, and the angle of the groove of the second side weld is greater than the angle of the groove of the first side weld, the degree of depth of the groove of the second side weld is less than the degree of depth of the groove of the first side weld, therefore, second side weld is conducive to the straight grinder arrival root of weld and carries out back chipping, ensure that back chipping quality, and, the angle of the groove of the second side weld after back chipping reaches the requirement of angle within 50 ° ~ 60 ° scopes of the groove of the weld seam required in EN15085-3 standard, and the degree of depth of groove is less, welding arc can contact groove root and groove upper surface, thus effectively ensure that welding quality.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the DHV type weld seam of prior art;
The structural representation of the DHV type weld seam that Fig. 2 provides for the embodiment of the present invention;
The flow chart of the welding method of the DHV type weld seam that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is the structural representation after the first side weld has welded;
Fig. 5 is the structural representation of the second side weld after back chipping completes;
Fig. 6 be in prior art back chipping complete after the structural representation of weld seam;
Fig. 7 is the structural representation after the second side weld has welded.
Description of reference numerals:
1: hitch panel;
2,4: the groove of weld seam;
3: upper cover plate;
5: the groove of weld seam after back chipping;
11: welding single-piece;
12: upper cover plate or lower cover;
The groove of 13: the first side welds;
The groove of 14: the second side welds;
15: root face;
16: the first side weld weld layers;
17: the groove of the second side weld after back chipping;
18: the second side weld weld layers.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The structural representation of the DHV type weld seam that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, the groove 13 of the first side weld and the groove 14 of the second side weld of welding single-piece 11 are unsymmetric structure, the degree of depth s1 that the angle [alpha] 1 of the groove 13 of the first side weld is less than the groove 13 of angle [alpha] 2, first side weld of the groove 14 of the second side weld is greater than the degree of depth s2 of the groove 14 of the second side weld.Wherein, welding single-piece 11 can for leading the hitch panel of slow composition, then the groove 13 of the first side weld and the groove 14 of the second side weld are respectively the groove of the weld seam that hitch panel and upper cover plate or lower cover 12 are formed.The groove of what the dotted line in Fig. 2 represented is two side welds is the schematic diagram of symmetrical structure, and two side welds only revealed in the present embodiment in order to comparison body are asymmetric divided edge structure.
The flow chart of the welding method of the DHV type weld seam that Fig. 3 provides for the embodiment of the present invention.On the basis of the structure of the type of DHV shown in Fig. 2 weld seam, the method comprises the following steps:
Step 101, weld the first side weld, wherein, the angle of the groove of the first side weld is more than or equal to 50 °, and is less than or equal to 60 °.
In the present embodiment, because the angle of the groove of the second side weld is larger, be conducive to the straight grinder arrival root of weld and carry out back chipping, therefore, the first first less to the angle of groove side weld welds, and, angle due to the groove of the first side weld is more than or equal to 50 °, and be less than or equal to 60 °, reach the requirement of angle within 50 ° ~ 60 ° scopes of the groove of the weld seam required in EN15085-3 standard, such as, the angle of the groove of the first side weld can be processed as 52 °, welding arc can contact the root of weld and weld seam upper surface, ensure that welding quality.Fig. 4 is the structural representation after the first side weld has welded, and as shown in Figure 4, the thickness of welding single-piece is 25mm, and the angle of the groove of the second side weld is 69 °, and the first side weld weld layer 16 number of channels is 6 layer of 11 road.
Step 102, the first side weld has been welded after, back chipping and back chipping Liquid penetrant testing are carried out to the second side weld.
In the present embodiment, after first side weld has been welded, need to carry out back chipping to the second side weld, thus the defect such as pore, pit, impurity that second root of weld caused described in when removing welding the first side weld occurs, with ensure the second side weld quality reach instructions for use.Also need constantly to carry out back chipping Liquid penetrant testing in back chipping process, whether reach instructions for use to detect back chipping quality.
Step 103, when back chipping Liquid penetrant testing is qualified, welding back chipping after the second side weld.
Fig. 5 is the structural representation of the second side weld after back chipping completes.Fig. 6 be in prior art back chipping complete after the structural representation of weld seam.Fig. 7 is the structural representation after the second side weld has welded.For as shown in Figure 5, the angle of the groove 17 of the second side weld after back chipping becomes 56 ° by original 69 °, the degree of depth due to the groove 17 of the second side weld before back chipping is 8mm, the length of root face is 1mm, the back chipping degree of depth is 5mm, therefore, the degree of depth of the groove 17 of the second side weld after back chipping is 8+1+5=14mm.As shown in Figure 6, in prior art, after back chipping, the angle of the groove 5 of weld seam is 49 °, and the degree of depth due to the groove 17 of the second side weld before back chipping is 12mm, the length of root face is 1mm, the back chipping degree of depth is 5mm, and therefore, the degree of depth of the groove 17 of the second side weld after back chipping is 12+1+5=18mm.Fig. 5 and Fig. 6 contrast can obviously be found out, in the embodiment of the present invention, the angle of the groove 17 of the second side weld after back chipping is 56 °, reach the requirement of angle within 50 ° ~ 60 ° scopes of the groove of the weld seam required in EN15085-3 standard, further, the degree of depth of the groove 17 of the second side weld after back chipping is less, and welding arc can contact groove root and groove upper surface, thus ensure that welding quality, the second side weld weld layer 18 welded is as shown in Figure 7.
The welding method of the DHV type weld seam that the embodiment of the present invention provides, first weld the first side weld, after having been welded by the first side weld, back chipping and back chipping Liquid penetrant testing are carried out to the second side weld, when the result of back chipping Liquid penetrant testing meets back chipping standard, the second side weld after welding back chipping.Because the groove of the first side weld and the groove of the second side weld that weld single-piece are unsymmetric structure, and the angle of the groove of the first side weld is less than the angle of the groove of the second side weld, the degree of depth of the groove of the first side weld is greater than the degree of depth of the groove of the second side weld, therefore, second side weld is conducive to the straight grinder arrival root of weld and carries out back chipping, ensure that back chipping quality, and, the angle of the groove of the second side weld after back chipping reaches the requirement of angle within 50 ° ~ 60 ° scopes of the groove of the weld seam required in EN15085-3 standard, and the degree of depth of groove is less, welding arc can contact groove root and groove upper surface, thus effectively ensure that welding quality.
Alternatively, the ratio of the degree of depth of the degree of depth of the groove of the second side weld and the groove of the first side weld is more than or equal to 1:4, and is less than or equal to 1:2.Preferably, can be 1:2 by the ratio setting of the degree of depth of the groove of the degree of depth of the groove of the second side weld and the first side weld in process, thus the requirement of the angle of the groove of the weld seam required in the angle EN15085-3 standard of the groove of the first side weld within 50 ° ~ 60 ° scopes can be made, ensure that welding quality, and, make the angle of the groove of the second side weld comparatively large, ensure back chipping quality.
Alternatively, degree of depth s1 '=s2+q+p of the groove of the second side weld after back chipping, wherein, s2 is the degree of depth of the groove 14 of the second side weld, and q is the back chipping degree of depth, and p is the length of the root face 15 of welding single-piece.
Alternatively, the length p of root face 15 is more than or equal to 1mm, and is less than or equal to 2mm.
Alternatively, the plate thickness of welding single-piece 11 is more than or equal to 12mm, and is less than or equal to 35mm.
In the present embodiment, about the length of the back chipping degree of depth, root face and the plate thickness of welding single-piece, those skilled in the art can set according to the actual requirements, the such scheme provided in the present invention is only the scheme of several optimization, back chipping quality and welding quality can be ensured preferably, but not as limit.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (6)
1. the welding method of a double bevel groove docking DHV type weld seam, be applied to welding single-piece, it is characterized in that, the groove of the first side weld of described welding single-piece and the groove of the second side weld are unsymmetric structure, the angle of the groove of described first side weld is less than the angle of the groove of described second side weld, and the degree of depth of the groove of described first side weld is greater than the degree of depth of the groove of described second side weld; Described method comprises:
Weld described first side weld; Wherein, the angle of the groove of described first side weld is more than or equal to 50 °, and is less than or equal to 60 °;
After having been welded by described first side weld, back chipping and back chipping Liquid penetrant testing are carried out to described second side weld;
When described back chipping Liquid penetrant testing is qualified, the second side weld after welding back chipping.
2. method according to claim 1, is characterized in that, the ratio of the degree of depth of the degree of depth of the groove of described second side weld and the groove of described first side weld is more than or equal to 1:4, and is less than or equal to 1:2.
3. method according to claim 1 and 2, is characterized in that, degree of depth s1 '=s2+q+p of the groove of the second side weld after described back chipping, wherein, s2 is the degree of depth of the groove of the second side weld before back chipping, and q is the back chipping degree of depth, and p is the length of the root face of described welding single-piece.
4. method according to claim 3, is characterized in that, the length p of described root face is more than or equal to 1mm, and is less than or equal to 2mm.
5. method according to claim 1 and 2, is characterized in that, the angle of the groove of the second side weld after described back chipping is more than or equal to 50 °, and is less than or equal to 60 °.
6. method according to claim 1 and 2, is characterized in that, sheet material or the section bar thickness of described welding single-piece are more than or equal to 12mm, and are less than or equal to 35mm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106312246A (en) * | 2016-10-14 | 2017-01-11 | 辽宁忠旺铝合金精深加工有限公司 | Automatic welding process for aluminum alloy draw gear panel applied to subway |
| CN107442891A (en) * | 2017-07-18 | 2017-12-08 | 鲁西工业装备有限公司 | A kind of cut deal body longitudinal and girth welding joint and welding procedure |
| CN108563878A (en) * | 2018-04-19 | 2018-09-21 | 大连五州轨道科技有限公司 | Multi-functional welding structure Calculation of Fatigue Life confirms integrated integrated system with welding quality grade |
| CN108952585A (en) * | 2018-08-28 | 2018-12-07 | 江苏塞恩斯金属新材料科技有限公司 | The super high-strength low-alloy guide rail shape tube of Weight reduced type rotary digging driller mast |
| CN109773419A (en) * | 2018-12-19 | 2019-05-21 | 鲁西工业装备有限公司 | A kind of welding method of 30mm or more slab container casing and flange |
| CN111331276A (en) * | 2020-03-24 | 2020-06-26 | 哈尔滨锅炉厂有限责任公司 | Welding structure of spherical end socket of boiler barrel and reinforcing plate and manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108563878A (en) * | 2018-04-19 | 2018-09-21 | 大连五州轨道科技有限公司 | Multi-functional welding structure Calculation of Fatigue Life confirms integrated integrated system with welding quality grade |
| CN108563878B (en) * | 2018-04-19 | 2022-01-11 | 大连交通大学 | Welding structure fatigue life calculation and welding quality grade confirmation integrated system |
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| CN109773419A (en) * | 2018-12-19 | 2019-05-21 | 鲁西工业装备有限公司 | A kind of welding method of 30mm or more slab container casing and flange |
| CN111331276A (en) * | 2020-03-24 | 2020-06-26 | 哈尔滨锅炉厂有限责任公司 | Welding structure of spherical end socket of boiler barrel and reinforcing plate and manufacturing method |
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Application publication date: 20160106 |