CN103862134A - Vertical down welding method of J422 plain steel electrode - Google Patents
Vertical down welding method of J422 plain steel electrode Download PDFInfo
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- CN103862134A CN103862134A CN201210548866.7A CN201210548866A CN103862134A CN 103862134 A CN103862134 A CN 103862134A CN 201210548866 A CN201210548866 A CN 201210548866A CN 103862134 A CN103862134 A CN 103862134A
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- welding
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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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/0209—Seam welding; Backing means; Inserts of non-horizontal seams in assembling non-horizontal plates
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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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a vertical down welding method of a J422 plain steel electrode and belongs to a common steel structure welding manner. The invention discloses the vertical down welding method aiming at overcoming the shortcomings of weld beading, slag inclusion, undercut and air holes in the vertical up welding technology of the J422 plain steel electrode. The electrode is inclined upwards by an included angle of 45 degrees with a weld joint, a coating is enabled to contact with a weldment after arc striking, and continuous burning and slowly downward movement of the electric arc are kept to realize welding. The method is simple and convenient, and easy to implement.
Description
Technical field:
The present invention is in ordinary steel structure welding technology, while using the general steel electrode welding of J422, adopts the vertical method of welding downwards.
Background technology:
In arc-welding method, have the welding method of downhand welding, horizontal position welding, vertical position welding, four kinds of positions of overhead welding, the difficulty of welding method is also according to this sequentially.Downhand welding welding belongs to sequential welding, and welding quality defects is few, and speed is fast, and efficiency is high.Vertical position welding welding belongs to vertical upwards current interruption weldering, and solder technology difficulty is high, and the improper weldment that will make of welding operation produces the defects such as overlap, slag inclusion, undercut, pore, and the slow efficiency of speed of welding is low.Welding 100mm, the weldment that welding quality is close, the general steel electrode of J422 of use Φ 3.2, downhand welding only needs 2 minutes, and 2/3 root bead bar can complete, and vertical position welding needs 4.4 minutes, 5/3 root bead bar just can complete.Therefore, downhand welding is to allow welding personnel accept most, and the welding position that weld defect is minimum, welding efficiency is the highest.In real work, people can adopt several different methods to make weldment in downhand position, raise labour efficiency with this.In real work, because bulky equipment and member cannot overturn in welding production process, make to have produced in work a large amount of vertical position weldings.How to overcome the work defects such as vertical position welding poor welding quality, labour intensity is large, speed of welding is slow, become the primary difficult problem solving of welding personnel.
Summary of the invention:
The object of the invention is to make up in the general steel electrode vertical position welding of above-mentioned existing J422 technology and easily to produce the defects such as overlap, slag inclusion, undercut, pore, speed of welding be slow, propose a kind of vertical method of welding downwards, to improve welding quality, speed of welding.
For achieving the above object, the process that the present invention adopts is as follows: utilize four kinds of favourable power in the active force (power of blowing of surface tension, electromagnetism compression stress, plasma jet power, arcing gas) of droplet transfer, overcome the active force (gravity, spot pressure etc.) that is unfavorable for the droplet transfer, Welding Molten Drop is transitioned in welding bath from bottom to top and goes.Welding rod and weld seam are 45 ° of angles and are inclined upwardly, and make coating and steel part close contact after striking, keep electric arc continuous burning and slowly move down, and so just can make liquid molten drop rest on the position to be welded regular hour, to realize welding.The heating of arc welding is thermogenetic by resistance heat and electric arc, although the very high area of its temperature is very little, very short at high-temperature residence time, cooling velocity is very fast, and this is also conducive to realize vertical welding downwards.
Welding gimmick linear manipulation of electrode, speed of welding remains on 50～60mm/min and is advisable, and can cause too soon too book of arc blow or throat depth.As butt welded seam width and thickness have requirement, also available crescent manipulation of electrode.Welding current is selected: core diameter * 45=welding current.
The invention has the beneficial effects as follows: both save the operation of workpiece turning displacement, reached the welding effect that weld defect is few, weldquality is high after upset, reduced again wlding and power consumption, improved efficiency high.
Accompanying drawing explanation:
Fig. 1 is the schematic diagram of the vertical downward welding method of the general steel electrode of a kind of J422.In the accompanying drawings.(1) welding work pieces; (2) weld seam; (3) welding direction; (4) welding rod; (5) 45 ° of angles.
As shown in drawings, start welding in the upper end of weldment (1), the welding direction (3) of weld seam (2) adopts progressively downward, and welding rod (4) is 45 ° of angles (5) with weldment (1) and is tilted to.
The specific embodiment:
Connecting welding power line, regulates welding current to be advisable with welding rod (4) diameter * 45=welding current.In the upper end striking of weldment (1), force down electric arc and start welding.On rough weldment when welding, pressing welding rod (4) and weld seam is 45 ° of angles (5) and is inclined upwardly, make coating close contact weldment (1), can slag be blown down by blow force of arc like this, prevent that slag tenesmus from exceeding weld seam (2).There is no stopping of slag, more easily grasp welding direction (3), keep the length of welding arc, guarantee welding quality.
Speed of welding is advisable with 50～60mm/min, and while welding speed lower than 50～60mm/min, the molten bath of fusing can, under the effect of deadweight, gutter down with welding rod (4) is mobile, can not form weld seam (2); When weldering speed exceedes 50～60mm/min, the throat thickness of weld seam (2) can be less than the thickness that welding standard requires, and the penetration Quality Down of mother metal, causes penetration ratio to decline, and welding quality can not guarantee.
Claims (2)
1. the vertical method of welding downwards of the general steel electrode of J422, it is characterized in that: in the time using the general steel electrode vertical position welding welding of J422, welding rod and weld seam are 45 degree angles and are inclined upwardly, and speed of welding remains on 50～60mm/min, and welding current is selected 45 times of sizes of core diameter.
2. the vertical method of welding downwards of the general steel electrode of a kind of J422 according to claim 1, is characterized in that: when vertical position welding welding, welding direction selection is vertical welds downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548866.7A CN103862134A (en) | 2012-12-17 | 2012-12-17 | Vertical down welding method of J422 plain steel electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210548866.7A CN103862134A (en) | 2012-12-17 | 2012-12-17 | Vertical down welding method of J422 plain steel electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103862134A true CN103862134A (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210548866.7A Pending CN103862134A (en) | 2012-12-17 | 2012-12-17 | Vertical down welding method of J422 plain steel electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103862134A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104625330A (en) * | 2014-12-22 | 2015-05-20 | 大连齐车轨道交通装备有限责任公司 | Welding method |
| CN110681954A (en) * | 2019-10-30 | 2020-01-14 | 广船国际有限公司 | Method for assembling fillet weld at vertical position of thin plate |
-
2012
- 2012-12-17 CN CN201210548866.7A patent/CN103862134A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104625330A (en) * | 2014-12-22 | 2015-05-20 | 大连齐车轨道交通装备有限责任公司 | Welding method |
| CN110681954A (en) * | 2019-10-30 | 2020-01-14 | 广船国际有限公司 | Method for assembling fillet weld at vertical position of thin plate |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140618 |