CN102294531B - Long weld joint welding process - Google Patents
Long weld joint welding process Download PDFInfo
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- CN102294531B CN102294531B CN 201110219580 CN201110219580A CN102294531B CN 102294531 B CN102294531 B CN 102294531B CN 201110219580 CN201110219580 CN 201110219580 CN 201110219580 A CN201110219580 A CN 201110219580A CN 102294531 B CN102294531 B CN 102294531B
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Abstract
The invention provides a long weld joint welding process, which comprises positioning and welding of long weld joints, the length of each section of positioned weld joint is 80-100mm, and the distance between adjacent positioned weld joints is about 550mm; all sections to be welded are welded in a rightward welding method from the middle position of the first long weld joint to one end of the first long weld joint, and simultaneously all sections to be welded are welded sequentially from right to left in the rightward welding method from the middle position of the second long weld joint to one end of the second long weld joint; and all sections to be welded are sequentially welded from right to left in the rightward welding method from the other end of the first long weld joint to the middle position of the first long weld joint, and simultaneously all sections to be welded are sequentially welded from right to left in the rightward welding method from the other end of the second long weld joint to the middle position of the second long weld joint. By the weld joint welding process provided by the invention, the welding difficulty is reduced, the welding quality is improved, the preheating time is shortened through reducing the length of the positioned weld joints and continuous welding modes, and the welding efficiency is improved.
Description
Technical field
The present invention relates to solder technology, relate in particular to a kind of long weld joint welding process.
Background technology
At present, in order to improve the generation of welding production efficiency, minimizing weld defect, long weld seam generally adopts the equipment such as welding robot, special welding machine, completes by the method for automatic welding.But, in some Welding Structures, bridging arrangement as vehicle body of railway vehicle edge beam of underframe and floor, as depicted in figs. 1 and 2, be the long weld seam of twice of symmetry, due to main spar 3 obstructions on workpiece top, the welding gun or the automatic welding device inconvenience that cause welding region not have enough spaces to place automatic welding device enter welding region, make the first long weld seam 1 and the second long weld seam 2 be difficult to adopt automatic soldering method to complete, generally can only adopt the manual welding method to complete.
Existing concrete welding method is as follows: as shown in Figure 3, after the assembling workpiece, long weld seam is positioned welding, the length of every section tack weld 4 is 150mm, and adjacent positioned weld seam 4 spacings are 500mm approximately, after tack welding, every section tack weld 4 two ends is cleared up.So-called positioning welding refers to for general longer weld seam, welds a bit of weld seam or welds a solder joint every a segment distance, and purpose is that welded piece is pre-aligned, prevents workpiece movable in the welding process.
Next adopt centrosymmetric welding sequence, as shown in Figure 4, by two welders from the centre to both sides respectively along O
1A
1And O
2B
2Direction is welded.Therefore, when the welder welded the long weld seam of per pass, half weld seam was according to the direction welding of welding from right to left, i.e. rightward welding; Second half weld seam adopts the direction welding of welding from left to right, i.e. leftward welding.
Before welding, carry out preheating with oxygen-acetylene mixed flame to first to be welded section, then approximately 100 ℃ of preheat temperatures carry out the bottoming welding, make backing weld seam receive the arc end and are connected with tack weld 4.
After the bottoming welding, after weld seam is cooled to below 50 ℃, with milling tools and compressed air, the backing welding seam surface is carried out the interlayer cleaning, then preheating is carried out on backing welding layer surface, guarantee 80～100 ℃ of interlayer temperatures, carry out cover welding on bottoming layer surface.
The receipts arc end of the weld seam that welding is completed is cleared up, and then carries out preheating, according to above-mentioned steps, since the last period weld seam receive bottoming welding and the cover welding that the arc end carries out to be welded section 5 of next section, until complete O
1A
1And O
2B
2Bottoming welding and cover welding.
The welder takes welding machine and gets back to long weld seam middle part, according to the method described above, completes long weld seam and remains half length O
1B
1And O
2A
2Welding.
In above-mentioned welding process, all need preheating before every section to be welded section 5 weldering, not only the pre-thermal efficiency is low but also frequent closing oxygen bottle and acetylene cylinder are adjusted ratio and the flame status of oxygen-acetylene gas, causes the waste of gas.From the quality angle, the temperature of each preheating has certain error, and the error temperature reaches as high as 20 ℃, is unfavorable for that the welder guarantees the stable of welding parameter.And after every section manual weld seam carries out the bottoming welding, the weld metal zone still is in the high temperature more than 100 ℃, polish immediately under this high temperature and the interlayer cleaning work such as compressed air blowing, cause the stress that weld seam easily cracks and quenching causes to concentrate, bring safely hidden danger for weldquality.
Excessive with duration weld seam regional area sweating heat input quantity, cause the whole postwelding welding deformation of long weld seam larger, welding deformation is adjusted difficulty.Most welders get used to the rightward welding welding, and utilize prior art, and the long weld seam of half need adopt the leftward welding welding, and operating to the welder makes troubles, and are unfavorable for guaranteeing the quality of welding.
Summary of the invention
The invention provides a kind of long weld joint welding process, existing welding procedure efficient is low, distortion is large and the problem of operating difficulties to solve, and improves welding efficiency, guarantees welding quality.
The invention provides a kind of long weld joint welding process, wherein, comprising:
The first long weld seam and the second long weld seam are positioned welding, and the length of every section tack weld is 80-100mm, and the adjacent positioned weld spacing is 550mm approximately, after tack welding, described every section tack weld two ends is cleared up;
The initial end to described the first long weld seam from the centre position of described the first long weld seam adopts the rightward welding right-to-left successively all to be welded section to be welded; Meanwhile the initial end to described the second long weld seam from the centre position of described the second long weld seam, adopt the rightward welding right-to-left successively all to be welded section to be welded;
From the initial centre position to described the first long weld seam of the other end of described the first long weld seam, adopt the rightward welding right-to-left successively all to be welded section to be welded; Meanwhile from the initial centre position to described the second long weld seam of the other end of described the second long weld seam, adopt the rightward welding right-to-left successively all to be welded section to be welded.
Long weld joint welding process as above, in order to subdue stress, reduce distortion, to first paragraph to be welded section carry out preheating after, carry out bottoming welding, in the backing welding termination process, make the welding of to be welded section of each section receive the middle part that the arc end all rests on tack weld adjacent thereto, utilize the heat conduction of workpiece self, will weld the preheating quantity of the heat of input as to be welded section of next section, thereby improved operating efficiency.
After the first long weld seam and the second long weld seam are carried out backing welding, carry out cosmetic welding, with above-mentioned backing welding in like manner, in the process of cosmetic welding, make the welding of to be welded section of each section receive the middle part that the arc end all rests on tack weld adjacent thereto.
Preferably, butt welded seam carries out clearing up between cooling and integral layer after backing welding; Butt welded seam integral body is carried out the interlayer cleaning after cosmetic welding.
Long weld joint welding process provided by the invention is by the mode of rightward welding circulation welding, reduce the welding difficulty, improved welding quality, reduced preheating time by the length of minimizing tack weld and the mode of continuous welding, whole cooling whole cleaning, improved welding efficiency simultaneously.
Description of drawings
Fig. 1 is the weld seam schematic diagram of workpiece to be welded.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Fig. 3 is for using the Welding Structure schematic diagram of existing welding procedure.
Fig. 4 is existing long weld joint welding process schematic diagram.
The long weld joint welding process schematic diagram that Fig. 5 provides for the embodiment of the present invention.
The long weld joint welding process schematic flow sheet that Fig. 6 provides for the embodiment of the present invention.
Reference numeral:
The long weld seam of 1-first; The long weld seam of 2-second; The 3-main spar;
The 4-tack weld; To be welded section of 5-.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The long weld joint welding process schematic diagram that Fig. 5 provides for the embodiment of the present invention, the long weld joint welding process schematic flow sheet that Fig. 6 provides for the embodiment of the present invention, the embodiment of the present invention provides a kind of long weld joint welding process, please be simultaneously with reference to Fig. 3, comprising following steps:
In real work, can be welded the long weld seam of twice simultaneously by two welders, because weld seam is longer, for workpiece can be moved in welding process, first carry out positioning welding, tack weld length is 80-100mm, compared with prior art, shortened the length of tack weld, increased the spacing of tack weld, thereby made the better effects if of tack weld conduction heat also can improve the efficient of positioning welding.As shown in Figure 5, some E
1-E
10An and F
1-F
10The tack weld of regarding a plurality of equal length as 4 that can be similar to; Rightward welding is the welding method that most welders can skilled operations, particularly, please refer to Fig. 5, welder's first and welder's second all the zone between the twice weld seam also respectively along O
1A
1And O
2B
2Direction to be welded section 5 between a plurality of tack welds 4 is welded, when being soldered to A
1Point and B
2In the time of point, two welders are more respectively along A
2O
2And B
1O
1Direction remaining to be welded section 5 is welded, thereby realized that twice weld seam integral body all completes by rightward welding, improved weldquality.
Welding process in above-mentioned steps comprises preferably: to be welded section of first paragraph is carried out preheating, to increase welding penetration, reduce welding stress.In the present embodiment, only need to be welded section of first paragraph is carried out preheating, after every segment is welded for to be welded section 5, utilize the heat conductivility of workpiece self that heat is reached to be welded section 5 of next section, compared with prior art, having reduced all needs the time of preheating to every section to be welded section 5, thereby has improved welding efficiency.
Further, step 120 can specifically comprise: an initial end to the first long weld seam 1 welds from the centre position of the first long weld seam 1, and meanwhile an initial end to the second long weld seam 2 welds from the centre position of the second long weld seam 2; At first to be welded section of first paragraph is carried out preheating; After preheating, to be welded section of the first paragraph in the first long weld seam 1 and the second long weld seam 2 is carried out backing welding, receive the middle part that the arc end rests on the tack weld 4 of contiguous to be welded section 5; From the middle arc welding of tack weld 4, to be welded section of second segment is carried out backing welding, receive the arc end and rest on the middle part of next tack weld 4, until complete the described first long weld seam 1 and second long weld seam 2 all backing weldings of to be welded section 5.
After also welding is completed to be welded section preheating of first paragraph, due to the middle part of receiving the arc position and be positioned at tack weld 4, utilize the thermal conductivity of welded piece self, heat is reached to be welded section 5 starting the arc place of next section, thereby needn't carry out preheating for to be welded section 5 to next section again, and prior art is all that the end that the arc end rests on tack weld 4 is received in welding, utilize the effect of welding work pieces self heat conduction bad, also just can't utilize the thermal conductivity of workpiece self, so generally need all to do preheating to every section to be welded section 5, cause temperature contrast large, inefficiency.The change of receipts arc position has solved the every section to be welded section 5 large defectives of preheat temperature difference, has improved the stability of preheat temperature, has improved simultaneously productive temp and operating efficiency.
Preferably, after having carried out backing welding, weld seam integral body is cooled to room temperature, then butt welded seam integral body is carried out the interlayer cleaning.After completing integral solder, every section weld seam before is also naturally cooling, with in prior art to welding after the equal preheating of the weld seam of each segment, then wait for that the cooling process that just can process of every segment weld seam compares, improved operating efficiency.
After cooling cleaning in the operation of implementation step 130, step 130 can specifically comprise: weld from the other end of the first long weld seam 1 initial centre position to the first long weld seam 1, meanwhile weld from the other end of the second long weld seam 2 initial centre position to the second long weld seam 2, to be welded section of first paragraph in the first long weld seam 1 and the second long weld seam 2 is carried out cosmetic welding, receive the middle part that the arc end rests on the tack weld 4 of contiguous to be welded section 5; From the middle arc welding of tack weld 4, to be welded section of second segment is carried out cosmetic welding, receive the arc end and rest on the middle part of next tack weld 4, state the first long weld seam 1 and second long weld seam 2 all cosmetic weldings of to be welded section 5 until complete.
Preferably, after having carried out cosmetic welding, butt welded seam integral body is carried out the interlayer cleaning.Owing to needn't every segment being done preheating for to be welded section 5, the cosmetic welding of whole weld seam is completed continuously, continuous welding has avoided local welding zone sweating heat input too to concentrate the welding deformation that causes excessive, after completing welding, weld seam before is also naturally cooling, carry out again whole interlayer cleaning, thereby improved operating efficiency.
The long weld joint welding process that the embodiment of the present invention provides all adopts the rightward welding of convenient operation to weld in whole welding process, has guaranteed the quality of weld seam.Utilize the thermal conductivity of welded piece self, avoided the repetitive operation of every section equal preheating, improved the pre-thermal efficiency, guaranteed the stable of preheat temperature, the operation of continuous sequence has improved welding efficiency.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (3)
1. a long weld joint welding process, is characterized in that, comprising:
The first long weld seam and the second long weld seam are positioned welding, and the length of every section tack weld is 80-100mm, and the adjacent positioned weld spacing is 550mm, after tack welding, described every section tack weld two ends is cleared up;
The initial end to described the first long weld seam from the centre position of described the first long weld seam adopts the rightward welding right-to-left successively all to be welded section to be welded; Meanwhile the initial end to described the second long weld seam from the centre position of described the second long weld seam, adopt the rightward welding right-to-left successively all to be welded section to be welded;
From the initial centre position to described the first long weld seam of the other end of described the first long weld seam, adopt the rightward welding right-to-left successively all to be welded section to be welded; Meanwhile from the initial centre position to described the second long weld seam of the other end of described the second long weld seam, adopt the rightward welding right-to-left successively all to be welded section to be welded;
Described employing rightward welding right-to-left welds all to be welded section successively and comprises:
Order is from right to left carried out preheating to be welded section of the first paragraph in the described first long weld seam and the second long weld seam to be welded section;
To be welded section of first paragraph in the described first long weld seam and the second long weld seam is carried out backing welding, receive the middle part that the arc end rests on the tack weld of contiguous described to be welded section;
Middle arc welding from described tack weld, order from right to left, to be welded section of second segment in the described first long weld seam and the second long weld seam is carried out backing welding, receive the arc end and rest on the middle part of next tack weld, until complete the described first long weld seam and all backing weldings of to be welded section of the second long weld seam;
After completing the described first long weld seam and all backing weldings of to be welded section of the second long weld seam, also comprise:
To be welded section of first paragraph in the described first long weld seam and the second long weld seam is carried out cosmetic welding, receive the middle part that the arc end rests on the tack weld of contiguous described to be welded section;
From the middle arc welding of described tack weld, to be welded section of second segment is carried out cosmetic welding, receive the arc end and rest on the middle part of next tack weld, until complete the described first long weld seam and all cosmetic weldings of to be welded section of the second long weld seam.
2. long weld joint welding process according to claim 1, is characterized in that, before to be welded section of the first paragraph in the described first long weld seam and the second long weld seam is carried out cosmetic welding, also comprises:
The described first long weld seam and the second long weld seam of completing backing welding are cooled to room temperature, and butt welded seam integral body is carried out the interlayer cleaning.
3. long weld joint welding process according to claim 1, is characterized in that, after completing the described first long weld seam and all cosmetic weldings of to be welded section of the second long weld seam, also comprises:
The described first long weld seam and the second long weld seam integral body of completing cosmetic welding are carried out the interlayer cleaning.
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|---|---|---|---|
| CN 201110219580 CN102294531B (en) | 2011-08-02 | 2011-08-02 | Long weld joint welding process |
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|---|---|---|---|
| CN 201110219580 CN102294531B (en) | 2011-08-02 | 2011-08-02 | Long weld joint welding process |
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| CN102294531B true CN102294531B (en) | 2013-06-19 |
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| CN102672360A (en) * | 2012-05-16 | 2012-09-19 | 上海人民电力设备股份有限公司 | Welding method for long weld joint |
| CN104275558B (en) * | 2014-09-22 | 2016-08-31 | 安徽应流铸业有限公司 | Control welding deformation and improve the welding method of weldquality |
| CN104999187A (en) * | 2015-07-13 | 2015-10-28 | 渤海船舶重工有限责任公司 | Permanent locating segment assembling and welding method for rack and leg of drilling platform |
| CN105235446B (en) * | 2015-09-15 | 2017-10-13 | 上海汇众汽车制造有限公司 | Automobile axle |
| CN112207395B (en) * | 2019-07-10 | 2022-12-06 | 河南森源重工有限公司 | Welding method of transformer oil tank |
| CN113118601B (en) * | 2021-03-31 | 2022-07-26 | 中车青岛四方机车车辆股份有限公司 | Automatic welding method for railway vehicle |
| CN113210823A (en) * | 2021-05-21 | 2021-08-06 | 中建科工集团有限公司 | Welding method for urban sculpture steel plate |
| CN113714601B (en) * | 2021-09-03 | 2022-10-11 | 潍坊新松机器人自动化有限公司 | Long-weld-joint robot welding process |
| CN114535752A (en) * | 2022-01-25 | 2022-05-27 | 江苏首华智能装备有限公司 | Multi-section multi-mode welding system for ladle eliminating shell |
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| GB1597466A (en) * | 1977-05-11 | 1981-09-09 | Steigerwald Strahltech | Welding with beams of charged particles |
| JP2004306084A (en) * | 2003-04-07 | 2004-11-04 | Nippon Steel Corp | Composite welding method of laser welding and arc welding |
| CN102069307B (en) * | 2010-10-15 | 2012-08-01 | 林德工程（杭州）有限公司 | Method for welding bottom plate of large flat-bottom storage tank |
| CN102101219B (en) * | 2010-12-14 | 2013-07-10 | 南车南京浦镇车辆有限公司 | Production method of chassis of railway vehicle |
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Address after: 063035 Hebei province Fengrun District Tangshan City Road No. 3 factory Patentee after: CRRC TANGSHAN CO., LTD. Address before: 063035 Hebei province Fengrun District Tangshan City Road No. 3 factory Patentee before: Tangshan Railway Carriage Co., Ltd. |