CN201271794Y - Both side welding ceramic liner without back chipping - Google Patents
Both side welding ceramic liner without back chipping Download PDFInfo
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- CN201271794Y CN201271794Y CNU2008201906333U CN200820190633U CN201271794Y CN 201271794 Y CN201271794 Y CN 201271794Y CN U2008201906333 U CNU2008201906333 U CN U2008201906333U CN 200820190633 U CN200820190633 U CN 200820190633U CN 201271794 Y CN201271794 Y CN 201271794Y
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Abstract
The utility model discloses a non-back-gouging double-face welding ceramic backing, which comprises a ceramic backing block. Both sides of the ceramic backing block are designed to be cambered. Furthermore, the top surface of the ceramic backing block is designed in a concave cambered shape. The ceramic backing radically solves various problems of the conventional groove internal weld backing. On one hand, the cambered sides of the ceramic backing are tangent to the inclined plane of a groove so that the ceramic backing contacts with the groove linearly; not only the welding ceramic backing can be adapted to the changes in groove angles and fit-up gaps, but also the backing can be removed from the groove easily after backing welding. On the other hand, spaces for accommodating dregs are reserved between the point of the groove and the two cambered sides, which not only effectively ensures the root of the groove to be fused well, but also thoroughly eliminates the welding defects of slag inclusion and lack of fusion; furthermore, the welding efficiency is improved; and the welding quality is ensured. The non-back-gouging double face welding ceramic backing can completely substitute for the conventional weld backing.
Description
Technical field
The utility model relates to the two-sided welding backing that connects auxiliary appearance of weld in the weldering of metal thick plate, refers to a kind of not back chipping welding by both sides ceramic backing particularly.
Background technology
For the welding of metal thick plate penetration,, need open double groove and carry out two-sided welding in order to reduce welding deformation.Traditional welding method is to carry out backing welding earlier, but back of weld need carry out carbon arc air gouging back chipping and grinder buffing, not only efficient is low for this technology, contaminated environment, working condition are abominable, but also can have a strong impact on welding quality because back chipping does not cause welding slag inclusion, weld defect such as lack of penetration only.
In order to address the above problem, the technical staff adopts ceramic backing to make weld seam force moulding when backing welding, just can save carbon arc air gouging back chipping and polishing operation, thereby raise the efficiency, save electric power and material consumption, improve working conditions, reduce environmental pollution, guarantee welding quality.But traditional ceramic backing that is used in the metal thick plate groove, employing be to contact with groove face and forming surface is the structure of plane or convex arc surface, in the actual welding process, be easy to generate the problem aspect two:
One, gasket shapes must be consistent with bevel angle and gap, could guarantee appearance of weld.Even like this,, after welding is finished,, the effect that the weld seam cooling is shunk is difficult in the groove remove because firmly being stuck in liner because liner is that face contacts with groove.And in the bevel for welding processing and assembling process of reality, be difficult to guarantee that final double groove angle is consistent with the design angle of liner, therefore this liner is relatively poor to the adaptability of actual condition.They are two years old, in the backing welding process, the groove tip is that melt tank edge is big with respect to the middle rapid heat dissipation in molten bath, cooling velocity, and when the liner forming tank is plane or convex arc surface, gasket material at the most advanced and sophisticated place of groove is difficult to fusing, and deformability is poor, finally is that the melt tank edge place is easy to cause weld defects such as slag inclusion and incomplete fusion at the groove tip, need polishing again could continue to weld, welding quality is difficult to guarantee.
Summary of the invention
The purpose of this utility model is fundamentally to solve the existing existing variety of issue of liner, and a kind of wide adaptability, easy to use, the not back chipping welding by both sides ceramic backing that can guarantee welding quality are provided.
For realizing this purpose, the not back chipping welding by both sides ceramic backing that the utility model is designed comprises the ceramic backing piece, and its special character is: two lateral layout of described ceramic backing piece are arc surface shape.Further, the design of the end face of described ceramic backing piece is concaved circular cambered surface shape.
Advantage of the present utility model is: the arc surface shape side of designed ceramic backing is cut to the line contact mutually with metal thick plate groove inclined-plane, the contraction of backing weld seam can not clamped the ceramic backing piece, so the ceramic backing behind the backing welding is easy to break away from groove face and is eliminated.The moulding end face of designed ceramic backing is a concaved circular cambered surface shape, has reduced the height of bottom surface, molten bath, has increased fusion penetration, thereby has guaranteed groove root penetration.Simultaneously, the both sides of concaved circular cambered surface shape end face are most advanced and sophisticated, be easy to fusing during backing welding, and because liner two arc surface shape sides and groove inclined-plane are tangent, make and leave certain space between most advanced and sophisticated position of groove and the liner two sides, this space can be used as the storage slag space after the most advanced and sophisticated fusing in liner concaved circular cambered surface shape end face both sides, thereby guaranteed the deformability on liner concaved circular cambered surface shape end face both sides, avoided the generation of weld defects such as slag inclusion, incomplete fusion, efficiently solve the problems that produce when ceramic backing welds in traditional groove, have good welding quality.In addition, cross sectional shape of the present utility model is simple and practical, easy to make, wide adaptability, can replace traditional liner fully.
Description of drawings
Fig. 1 is a kind of cross-sectional TV structure schematic diagram of not back chipping welding by both sides ceramic backing;
The use confined state schematic diagram of Fig. 2 ceramic backing shown in Figure 1;
Fig. 3 is the cross-sectional TV structure schematic diagram of ceramic welding backing in traditional groove;
Fig. 4 is the use confined state schematic diagram of traditional welding liner shown in Figure 3;
Fig. 5 meets view for the moulding weldering of using ceramic backing shown in Figure 1 to carry out behind the backing welding;
Fig. 6 meets view for the slag inclusion incomplete fusion moulding weldering that use traditional welding liner shown in Figure 3 carries out being produced behind the backing welding.
The specific embodiment
Below in conjunction with embodiment, comparative example and accompanying drawing the utility model is described in further detail:
Embodiment: Figure 1 shows that not back chipping welding by both sides ceramic backing of the present utility model, it has ceramic backing piece 1, and the shape of ceramic backing piece 1 is the key factor that influences welding quality and liner removing complexity.Ceramic backing piece 1 is made up of four faces from cross section: two side 3 design is arc surface shape, and its end face 2 designs are concaved circular cambered surface shape, and its bottom surface 4 designs are planar shaped.Concaved circular cambered surface shape end face 2 has two characteristic parameters, and promptly concaved circular cambered surface width a and concaved circular cambered surface degree of depth b are called for short wide a of arc and the dark b of arc.The wide a of arc can determine that the fit-up gap is than the big 0～4mm of the wide a of arc according to the fit-up gap of welded unit, so the wide a=3～30mm of general arc, the dark b=1～2mm of arc can contain the welded unit of general all dimensional parameters basically.Do not wish that generally welded gaps is too big, therefore design the requirement that the wide a=3～15mm of arc, degree of depth b=1～2mm can satisfy most appearances of weld.Two sides 3 of ceramic backing piece 1 and the dimensional parameters of bottom surface 4 need adapt with bevel angle.Preferred 20～the 30mm of arc surface radius of side 3, the best is 20mm.The width c of bottom surface 4 should be than the big 10～15mm of width a of end face 2, preferred big 15mm.Press the above-mentioned parameter design, can satisfy the variation requirement of 45～60 ° of metal thick plate double V groove angles.In the present embodiment, the arc surface radius of the wide a=4mm of arc, the dark b=1mm of arc, two sides 3 is the width c=19mm of 20mm, bottom surface 4.
Comparative example: Figure 3 shows that traditional ceramic welding backing, comprise ceramic backing piece 1, the end face 2 of ceramic backing piece 1 is the plane, its width a=6mm; The two sides 3 of ceramic backing piece 1 are the inclined-plane, and the angle of two sides 3 is 60 °; The bottom surface 4 of ceramic backing piece 1 is the plane, and its width is 23mm.
Respectively ceramic backing piece in the foregoing description and the comparative example 1 and aluminium foil pressure sensitive adhesive 6 are pasted together, again aluminium foil pressure sensitive adhesive 6 is pasted on the welded steel 5 together with ceramic backing piece 1, the welding experiment feels secure, the use confined state of embodiment as shown in Figure 2, the use confined state of comparative example as shown in Figure 4, experiment condition is as follows:
Experiment steel plate: thickness of slab 30mm;
Groove shape: X type groove, 60 ° of angles;
Welding method: semi-automatic CO
2Gas shielded arc welding;
Welding material: Φ 1.2mm flux-cored wire;
Welding conditions: 210A * 27V;
Fit-up gap: 6mm.
The welding experimental result is as shown in table 1 below:
Table 1
| Experiment | Be suitable for the fit-up gap scope | Be suitable for the bevel angle scope | The postwelding liner is removed complexity | Whether weld seam defectiveness |
| Embodiment | 4mm～8mm | 45°～60° | Remove easily | Zero defect |
| Comparative example | 8mm | 60° | Remove difficulty | Slag inclusion or incomplete fusion are arranged |
As can be seen from Table 1, among the utility model embodiment, the two arc surface shape sides 3 and the groove inclined-plane of ceramic backing piece 1 is cut to the line contact mutually, when backing weld seam shrinks ceramic backing piece 1 generation squeezing action, in groove, can produce a downward thrust (component) to ceramic backing piece 1, this thrust can overcome the groove inclined-plane contact with two arc surface shape sides, 3 lines produce than less friction, ceramic backing piece 1 is easy to remove behind the backing welding.Simultaneously, two arc surface shape sides 3 and the tangent variation that can adapt to different bevel angles and fit-up gap in groove inclined-plane.In addition, as can be seen from Figure 2, the space is left at the junction and the groove tip of concaved circular cambered surface shape end face 2 and two arc surface shape sides 3, so both guaranteed that the groove tip can fuse well, slag after the fusing of concaved circular cambered surface shape end face 2 both sides also has storage slag space simultaneously, make ceramic backing piece 1 have good deformability, effectively avoided the existence of slag inclusion and incomplete fusion weld defect.Its appearance of weld state as shown in Figure 5, visible weld seam 7 level and smooth fairing among the figure.
And in traditional comparative example, two inclined sides 3 of ceramic backing piece 1 contact with groove inclined-plane formation face, when backing weld seam shrinks ceramic backing piece 1 generation squeezing action, form very big frictional force between its two inclined side 3 and the groove inclined-plane, be difficult to behind the backing welding in groove, remove.Simultaneously, a kind of ceramic backing piece 1 of dimensional parameters can only corresponding a kind of bevel angle and fit-up gap, can not adapt to the variation of bevel angle and fit-up gap.In addition, as can be seen from Figure 4, two lateral incline 3 of ceramic backing piece 1 fit tightly with the groove beveled tip, make the groove tip be difficult to penetration on the one hand, slag after the liner fusing does not have space storage on the most advanced and sophisticated both sides of groove on the other hand, is easy to cause the slag inclusion and the incomplete fusion defective on groove both sides like this.Its appearance of weld state as shown in Figure 6, the root of visible weld seam 7 has slag inclusion 8 among the figure.
In sum, the not back chipping welding by both sides ceramic backing that the utility model proposed is a kind of very good design, compare with traditional welding backing, not only can adapt to the different bevel angles and the variation of fit-up gap, and thoroughly avoided slag inclusion and incomplete fusion weld defect, and improved welding efficiency, guaranteed welding quality, have obvious superiority, can replace fully.
Claims (10)
1. a back chipping welding by both sides ceramic backing not comprises ceramic backing piece (1), it is characterized in that: two sides (3) design of described ceramic backing piece (1) is arc surface shape.
2. not back chipping welding by both sides ceramic backing according to claim 1, it is characterized in that: the arc surface radius of said side (3) is 20～30mm.
3. not back chipping welding by both sides ceramic backing according to claim 1, it is characterized in that: the arc surface radius of said side (3) is 20mm.
4. according to claim 1 or 2 or 3 described not back chipping welding by both sides ceramic backings, it is characterized in that: end face (2) design of said ceramic backing piece (1) is concaved circular cambered surface shape.
5. not back chipping welding by both sides ceramic backing according to claim 4 is characterized in that: concaved circular cambered surface width a=3～30mm, the degree of depth b=1～2mm of said end face (2).
6. not back chipping welding by both sides ceramic backing according to claim 4 is characterized in that: the wide a=3～15mm of concaved circular cambered surface arc of said end face (2), degree of depth b=1～2mm.
7. according to claim 1 or 2 or 3 described not back chipping welding by both sides ceramic backings, it is characterized in that: the width c of the bottom surface (4) of said ceramic backing piece (1) is than the big 10～15mm of width a of end face (2).
8. not back chipping welding by both sides ceramic backing according to claim 4 is characterized in that: the width c of the bottom surface (4) of said ceramic backing piece (1) is than the big 10～15mm of width a of end face (2).
9. not back chipping welding by both sides ceramic backing according to claim 5 is characterized in that: the width c of the bottom surface (4) of said ceramic backing piece (1) is than the big 10～15mm of width a of end face (2).
10. not back chipping welding by both sides ceramic backing according to claim 6 is characterized in that: the width c of the bottom surface (4) of said ceramic backing piece (1) is than the big 10～15mm of width a of end face (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201906333U CN201271794Y (en) | 2008-09-03 | 2008-09-03 | Both side welding ceramic liner without back chipping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201906333U CN201271794Y (en) | 2008-09-03 | 2008-09-03 | Both side welding ceramic liner without back chipping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201271794Y true CN201271794Y (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201906333U Expired - Lifetime CN201271794Y (en) | 2008-09-03 | 2008-09-03 | Both side welding ceramic liner without back chipping |
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| CN (1) | CN201271794Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106944724A (en) * | 2017-05-09 | 2017-07-14 | 中建钢构有限公司 | Unclear welding method of submerged-arc welding full penetration |
| CN112620888A (en) * | 2020-12-28 | 2021-04-09 | 中铁九桥工程有限公司 | Process method for single-side welding and double-side forming of Q500qENH weathering steel in alpine region |
-
2008
- 2008-09-03 CN CNU2008201906333U patent/CN201271794Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106944724A (en) * | 2017-05-09 | 2017-07-14 | 中建钢构有限公司 | Unclear welding method of submerged-arc welding full penetration |
| CN112620888A (en) * | 2020-12-28 | 2021-04-09 | 中铁九桥工程有限公司 | Process method for single-side welding and double-side forming of Q500qENH weathering steel in alpine region |
| CN112620888B (en) * | 2020-12-28 | 2022-04-19 | 中铁九桥工程有限公司 | Process method for single-side welding and double-side forming of Q500qENH weathering steel in alpine region |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN TIANGAO WELDING CO., LTD. Free format text: FORMER OWNER: XIAO SUYANG Effective date: 20110517 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430063 NO. 7-189-801, LIANMENG RESIDENTIAL QUARTER, SHUIYUN VILLAGE, WUCHANG DISTRICT, WUHAN CITY, HUBEI PROVINCE TO: 430056 TIANGAO INDUSTRIAL PARK, KEJIYUAN ROAD, WUHAN ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE, WUHAN CITY, HUBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110517 Address after: 430056 Hubei city of Wuhan province Wuhan economic and Technological Development Zone Technology Road Sky Industrial Park Patentee after: Wuhan Tiangao Welding Co., Ltd. Address before: 430063, Wuhan District, Hubei City, Wuchang Province Water Village Union District No. 7-189-801 Patentee before: Xiao Suyang |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430056 Hubei city of Wuhan province Wuhan economic and Technological Development Zone Technology Road Sky Industrial Park Patentee after: Wuhan Tiangao Welding Co., Ltd. Address before: 430056 Hubei city of Wuhan province Wuhan economic and Technological Development Zone Technology Road Sky Industrial Park Patentee before: Wuhan Tiangao Welding Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090715 |