CN1134326A - Narrow-gap manual electric arc welding method for oblique and vertical steel bars - Google Patents
Narrow-gap manual electric arc welding method for oblique and vertical steel bars Download PDFInfo
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- CN1134326A CN1134326A CN 95111331 CN95111331A CN1134326A CN 1134326 A CN1134326 A CN 1134326A CN 95111331 CN95111331 CN 95111331 CN 95111331 A CN95111331 A CN 95111331A CN 1134326 A CN1134326 A CN 1134326A
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Abstract
The said method features that the two ends of steel bars to be welded are clamped in welding mould fixture and the joints of steel bars are connected through manual electric arc welding. The said method solves successfully the problems of seam forming, thorough welding, slag and gas removing and preventing joint overheating and embrittlement, and is esp suitable for welding of mass thick steel bars and in overhead operation.
Description
The present invention relates to the Metal Material Welding technical field, relate in particular to the net muscle butt welding interconnection technique in the armored concrete pouring construction.
Oblique and vertical reinforcement in the present domestic cast-in-situ concrete construction adopts group's bundle method more or helps bar weldering, overlap welding to be connected.These conventional methods expend a large amount of steel and welding rod, and welder's labour intensity is big, production efficiency is low, the joint stress condition is poor, is difficult to satisfy the requirement of construction quality and progress.From smooth, rustless, the no greasy dirt of gas pressure welding specification requirement reinforcing bar end face light that Japan introduces, the non-oxidation layer, this is very harsh for the condition at reinforced concrete construction scene.Homemade gas pressure welding equipment is that manually parameters such as temperature, pressure, upset time are wayward good, and influence quality of weld joint.Electroslag pressure welding must be purchased expensive special welding equipment, reason owing to electroslag pressure welding welding machine volume and weight, be difficult to use in the net muscle welding under the intensive and work high above the ground condition of arrangement of reinforcement, electroslag welding joint crystal grain is thicker in addition, is difficult for guaranteeing the toughness of joint.Sleeve method of attachment cost is higher, at present is used for engineering construction more and has adopting in indivedual engineerings of higher or specific (special) requirements.In some engineering, adopted the narrow gap of horizontal reinforcement technology, but oblique, vertical reinforcement narrow gap welding method and horizontal reinforcement narrow gap welding method are essentially different in technological operation.Horizontal reinforcement narrow gap welding only is in the downhand position, and the welder adopts the manipulation of electrode of downhand welding to weld all the time.And to adopt the manipulation of electrode of downhand welding, horizontal position welding, vertical position welding or overhead welding in the welding process of oblique and vertical reinforcement narrow gap welding.Have only the use that replaces mutually according to certain rules by several manipulation of electrodes, can prevent that just molten iron is dirty, thereby solve appearance of weld, through welding, deslagging, exhaust prevents that joint microstructure is overheated and the crisp problem of quenching.Handled by welding steel muscle end face in addition, the size of preset clearance between the end face, the selection of welding current and reinforcing bar position are all different with horizontal reinforcement narrow gap welding method.
The purpose of this invention is to provide a kind of arc welding equipment by hand connect oblique, vertical reinforcement joint to welding method, it can solve weldering effectively and meet moulding, through welding, deslagging, exhaust, prevents that joint microstructure is overheated and quench crisp problem.
The present invention is realized by following technical scheme, to be installed in the vertical reinforcement weldering die clamper by two terminations of welding steel muscle, distance between two end faces of oblique reinforcing bar is 9～16 millimeters, and two end faces of oblique reinforcing bar are straight end face, and the gap of two end face roots of vertical reinforcement is 5～8 millimeters.The end face of top vertical reinforcement is tiltedly straight end face, and inclination angle of inclined plane is 60 °～65 °, and the end face of bottom vertical reinforcement is straight end face.Diameter according to welding rod is selected welding current (seeing Table 1).In lower rebar end face root and the striking piece contact position striking of putting into the weldering die clamper, and carry out the short arc sequential welding, when electric arc moves to the reinforcing bar end face, electric arc must maintenance be not less than 30 ° inclination angle with end face.The backing weld seam (or root run) that connects the upper and lower end face root must be finished in the first root bead bar, changes welding rod when rapid, and in last root bead bar current interruption place striking.In welding, to reposefully, reasonably alternately adopt the manipulation of electrode of downhand welding, horizontal position welding, vertical position welding, overhead welding,, prevent that the dirty joint that makes of molten iron is full level and smooth to guarantee exhaust, deslagging, penetration.The postwelding reservation was removed mould, the slag on the knock-off joint in about 5 minutes.
Effect that the present invention is compared with prior art had and advantage are that it need not purchase special welding equipment, only being required to be vertical reinforcement narrow gap welding weldering that welder configuration produces voluntarily touches anchor clamps (the weldering die clamper has obtained patent, ZL93238739X) just can utilize the existing common electrical arc-welding machine in building site to weld.The vertical reinforcement joint of a 28 of weldering only needs 3 minutes, and welding rod consumes 2.5～3, adopts group's bar weldering to need 22～24 minutes, consumes 12 of welding rods.The former improves work efficiency more than 5 times than the latter, has saved reinforcing bar and saving welding rod as group's bar.Compare with other conventional connecting method for reinforcing bars, this technology can reduce cost 60～85%, and work efficiency improves 4～6 times, every performance indications of joint all reach the relevant specification requirement of country.
Description of drawings of the present invention:
Fig. 1: be oblique reinforcing bar narrow gap welding schematic diagram.
Fig. 2: be vertical reinforcement narrow gap welding schematic diagram.
Below by accompanying drawing oblique and vertical reinforcement narrow gap welding method are further described.
1. oblique reinforcing bar welding operation is as follows:
Become 27 °～65 ° reinforcing bar can adopt oblique reinforcing bar narrow-gap manual electric arc method with level.
On the diagonal bar of bottom, make steel bar end 4 (straight end face) be in copper mold 2 point midways mould holding; Diagonal bar termination, top 1 (straight end face) places copper mold 2, sees accompanying drawing 1.Reserve certain clearance between the end face; Bolt on the fastening mould makes diagonal bar centering, and is fastening; Selected certain electric current sees Table 1, with striking piece 3 contacting ignition arcs of welding rod 5 in lower rebar and weldering die clamper.Carry out the short arc welding, the welding operation is divided into three phases:
(1) downhand welding, horizontal position welding are adopted in backing weld seam welding, and the overhead welding manipulation of electrode replaces sequential welding according to certain rules.
(2) middle level weld seam welding adopts downhand welding, horizontal position welding manipulation of electrode rationally to replace sequential welding.
(3) closing in weld seam welding adopts horizontal position welding, vertical position welding to replace discontinuous welding.
The postwelding joint is incubated about 5 minutes in mould; Slag on the form removal knock-off joint.
2. the vertical reinforcement welding operation is as follows:
With level be 66 °～90 ° reinforcing bar, available vertical reinforcement narrow-gap manual electric arc method.Its operation is as follows: on lower rebar 4, the termination (straight end face) of reinforcing bar is in the middle of the copper mold 2 mould holding; The angled end-face of the perpendicular muscle 1 in top is placed particular manufacturing craft, and the root of end face is reserved certain clearance, and selected certain electric current (seeing Table 1) is with striking piece 3 contacting ignition arcs of welding rod 5 in lower rebar and weldering die clamper.Carry out the short arc welding.The welding operation is divided into three phases:
1. root run welding is adopted downhand welding, horizontal position welding, overhead welding manipulation of electrode to replace sequential welding by rule and is finished the root run welding.
2. middle level weld seam welding adopts downhand welding, horizontal position welding manipulation of electrode rationally to replace sequential welding.
3. surperficial closing in weld seam welding adopts horizontal position welding, vertical position welding manipulation of electrode to replace discontinuous welding, and postweld heat preservation is about 5 minutes; Tear the slag on the horizontal knock-off joint open.
The specification requirement of oblique, vertical reinforcement narrow-gap manual electric arc method:
Reinforcing bar lower surface root must a striking success, even arc manipulation immediately after the striking must not current interruption, pause, bottoming (root) weld seam must be finished in the first root bead bar.
2. adopt the short arc welding, arc manipulation is wanted steadily, swings moderately, and speed is proper.Gas is discharged, slag is drained in the hole between reinforcing bar and the copper mold.
3. when electric arc moved to the reinforcing bar end face, electric arc and end face must keep being not less than 30 ° angle, to strengthen the fusion penetration of end face.
4. change welding rod and want rapidly, striking continues welding under current interruption.
5. adopt the discontinuous welding during except that replacing welding rod or face of weld closing in weld seam, must not current interruption interrupt welding in the welding as far as possible.
6. the end face of reinforcing bar keeps smooth, and available saw cuts and cuts, grinding wheel cutting or welding arc cutting.The more smooth reinforcing bar of supply of material state end face need not processed and can weld.
Claims (4)
1. oblique, a vertical reinforcement narrow-gap manual electric arc welding method is characterized in that being installed in the weldering die clamper by two terminations of welding steel muscle; Oblique two terminations by the welding steel muscle are straight end face, and the gap between the both ends of the surface is 9～16 millimeters; Vertical top is tiltedly straight end face by the termination of welding steel muscle, and the bottom is straight end face by the termination of welding steel muscle, and the gap between the both ends of the surface root is 5～8 millimeters; In the striking piece contact position striking of reinforcing bar lower surface root in the weldering die clamper, keep being no less than 30 ° inclination angle between electric arc and the end face.
2. oblique, vertical reinforcement narrow-gap manual electric arc welding method according to claim 1, the backing weld seam or the root run that it is characterized in that connecting the upper and lower end face root are finished in the weldering first root bead bar.
3. oblique, vertical reinforcement narrow-gap manual electric arc welding method according to claim 1, it is characterized in that vertically connecting the oblique directly inclination angle of end face of upper reinforcement is 60 °～65 °.
4. oblique, vertical reinforcement narrow-gap manual electric arc welding method according to claim 1 is characterized in that the selection of welding current according to the form below.
Table 1
Core diameter Oblique reinforcing bar welding current The vertical reinforcement welding current
3.2(mm) 4.0(mm) 5.0(mm) ????110～120(A) ????165～185 ????200～220 ???105～115 ???160～170 ???185～210
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95111331 CN1134326A (en) | 1995-04-25 | 1995-04-25 | Narrow-gap manual electric arc welding method for oblique and vertical steel bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95111331 CN1134326A (en) | 1995-04-25 | 1995-04-25 | Narrow-gap manual electric arc welding method for oblique and vertical steel bars |
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| Publication Number | Publication Date |
|---|---|
| CN1134326A true CN1134326A (en) | 1996-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95111331 Pending CN1134326A (en) | 1995-04-25 | 1995-04-25 | Narrow-gap manual electric arc welding method for oblique and vertical steel bars |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464935C (en) * | 2003-05-15 | 2009-03-04 | 梁满堂 | Gas-protected special steel bar welding method and fixture |
| CN102941398A (en) * | 2012-10-31 | 2013-02-27 | 国家电网公司 | Welding method of steel reinforcement strip welding |
| CN103406640A (en) * | 2013-09-06 | 2013-11-27 | 安徽应流集团霍山铸造有限公司 | Automatic deslagging welding method for manual electric-arc welding |
| CN103639623A (en) * | 2013-11-27 | 2014-03-19 | 四川华构住宅工业有限公司 | Steel bar welding method for steel bar dense region |
| CN108247229A (en) * | 2017-12-26 | 2018-07-06 | 新疆送变电有限公司 | A kind of welding procedure for being grounded side item weldering |
| CN108326392A (en) * | 2018-04-10 | 2018-07-27 | 中冶建筑研究总院有限公司 | A kind of welding procedure of 2205 two phase stainless steel reinforcing bar |
| CN113182643A (en) * | 2021-02-08 | 2021-07-30 | 贵阳铝镁设计研究院有限公司 | Method for preventing molten iron from flowing outwards in deep and narrow seam welding |
-
1995
- 1995-04-25 CN CN 95111331 patent/CN1134326A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464935C (en) * | 2003-05-15 | 2009-03-04 | 梁满堂 | Gas-protected special steel bar welding method and fixture |
| CN102941398A (en) * | 2012-10-31 | 2013-02-27 | 国家电网公司 | Welding method of steel reinforcement strip welding |
| CN102941398B (en) * | 2012-10-31 | 2016-04-27 | 国家电网公司 | Reinforcing bar side bar welding method |
| CN103406640A (en) * | 2013-09-06 | 2013-11-27 | 安徽应流集团霍山铸造有限公司 | Automatic deslagging welding method for manual electric-arc welding |
| CN103639623A (en) * | 2013-11-27 | 2014-03-19 | 四川华构住宅工业有限公司 | Steel bar welding method for steel bar dense region |
| CN103639623B (en) * | 2013-11-27 | 2016-04-27 | 四川华构住宅工业有限公司 | The steel bar welding method of reinforcing bar close quarters |
| CN108247229A (en) * | 2017-12-26 | 2018-07-06 | 新疆送变电有限公司 | A kind of welding procedure for being grounded side item weldering |
| CN108326392A (en) * | 2018-04-10 | 2018-07-27 | 中冶建筑研究总院有限公司 | A kind of welding procedure of 2205 two phase stainless steel reinforcing bar |
| CN113182643A (en) * | 2021-02-08 | 2021-07-30 | 贵阳铝镁设计研究院有限公司 | Method for preventing molten iron from flowing outwards in deep and narrow seam welding |
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