CN1188031A - Square groove welding technology for welding 8-12 mm middle-thick plate by continuous welding rod - Google Patents
Square groove welding technology for welding 8-12 mm middle-thick plate by continuous welding rod Download PDFInfo
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- CN1188031A CN1188031A CN97108808A CN97108808A CN1188031A CN 1188031 A CN1188031 A CN 1188031A CN 97108808 A CN97108808 A CN 97108808A CN 97108808 A CN97108808 A CN 97108808A CN 1188031 A CN1188031 A CN 1188031A
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Abstract
The present invention relates to a welding technology using straight-long type continuous welding rod and square groove to weld 8-12 mm middle-thick plate. It adopts continuous arc method and procedure of welding by both sides and forming by both sides (or welding by one side and forming by both sides to weld 8 mm plate), can eliminate the procedure of bevelling angle groove, and its welding stress distribution is uniform, angular distortion is less, and when welding, it has no need of presetting reversible deformation, and can raise welding efficiency, reduce welding cost and reduce labour intensity.
Description
The invention belongs to a kind of manual electric arc welding welding procedure.
The cut deal of 8-12mm when adopting the welding of common electrical welding rod, is to guarantee the root run quality, must bevel (seeing figure one), and the welding number of plies more (seeing figure two), all need three layer of three road as downhand welding and vertical position welding position, and the horizontal position welding position more need reach four layer of ten road.Trace it to its cause, be that the welding rod penetration is limited, complicated operation.Its each welding position fitted position is seen figure one, and layer is seen figure two.
The object of the present invention is to provide a kind of welding procedure of straight elongated continuous welding rod welding 8-12mm cut deal.Divide downhand welding, vertical position welding, three kinds of welding positions of horizontal position welding.
Feature of the present invention is: adopt linked arc method welding by both sides double-faced forming (or single face welding and double face shaping weldering 8mm plate); Remove out the controlling angle groove from, welding stress is evenly distributed, and angular deformation is little, need not prefabricated reversible deformation during welding.
Different welding rods can weld different mother metals, and for example: welding rod is a carbon steel core, and mother metal is that C-Mn is a carbon steel; Welding rod is the carbon steel or low alloy steel core, and mother metal is a low-alloy high-strength steel; Welding rod is carbon steel or chrome molybdenum steel core, and mother metal is a heat resisting steel; Welding rod is stainless steel core, and mother metal is a stainless steel.
Straight elongated continuous welding rod adopts dynamically transmission of electricity continuously, makes its conductive lengths shorten several times than traditional welding rod, and welding current is subjected to the restriction of core wire resistance hardly.Thereby can use bigger welding current, the small dimension welding rod has the big specification welding rod effectiveness of substituting.But the welding current of continuous welding rod conducting improves more than 3 times than the short welding rod of same size, and still has the mechanical constraint of coating sleeve, and the penetration ability of electric arc is strengthened greatly.So the welding procedure that adopts common welding rod again can't be given full play to the advantage of this welding rod.
Accompanying drawing three is tack welding position view of the present invention.
Accompanying drawing four is tack welding fitted position schematic diagram of the present invention.
Accompanying drawing five (a) is a butt-weld in the downhand position arc manipulation method schematic diagram of the present invention.
Accompanying drawing five (b) is a butt-weld in the downhand position arc manipulation method schematic diagram of the present invention.
Accompanying drawing six is butt-weld in the downhand position layer schematic diagram of the present invention.
Accompanying drawing seven docks vertical position welding fitted position schematic diagram for the present invention.
Accompanying drawing eight (a) docks vertical position welding arc manipulation method schematic diagram for the present invention.
Accompanying drawing eight (b) docks vertical position welding arc manipulation method schematic diagram for the present invention.
Accompanying drawing nine docks vertical position welding layer schematic diagram for the present invention.
Accompanying drawing ten docks horizontal position welding fitted position schematic diagram for the present invention.
Accompanying drawing 11 docks horizontal position welding arc manipulation method schematic diagram for the present invention.
Accompanying drawing 12 docks horizontal position welding layer schematic diagram for the present invention.
Further specify below in conjunction with accompanying drawing:
Butt-weld in the downhand position technology (size 20 steel plates with the 15th regulation of JB1152-88 are welded as example)
Joint need be processed straight, removes dirts such as iron rust, oil, oxide skin with instruments such as file, emery cloth, wire brush or sanding machine (just, the back side) in the 20mm scope of abutment joint both sides, makes it to present the gloss of metal; When workpiece welds in assembling and positioning, employed welding rod during with formal welding employed welding rod identical.Figure three is seen at the two ends 10mm place of back of work in the position of tack welding; Beginning weldering end can suitably reduce counting of tack welding, and the weldering end must firm position eventually, diminishes and influences welding to prevent from because of the contraction in the welding process, to cause not weld intersegmental crack.When positioning weldering, leave allowance for shrinkage, promptly the gap of weld seam beginning weldering end is 3.0mm, and the weldering end is 3.2mm eventually.Welding rod is selected the straight elongated welding rod of J422 φ 2.5mm for use, requires welding rod to become damp and rotten, and core wire and electric contact are rustless, and coating must not ftracture and come off.With preceding drying to 350--400 ℃ constant temperature 2h.Adopt direct current source of welding current opposition method.
The workpiece fitted position is seen figure four.Welding divides twice: together positive, reverse side together.The arc manipulation method is seen figure five (a), is straight line moving (gap comparatively hour), or sees figure five (b), is curve walking (when the gap is big).The welding level is seen figure six, for two-layer.Welding condition sees Table 1.The weld appearance dimensional requirement sees Table 2.
(1) front welding bead
A. the striking electric arc that ignites at test specimen tack weld place is had a break, and about 2S makes little triangle arc manipulation forward then.Welding rod angle is 80 °～90 ° (with the angle of welding direction).It is steady that gimmick is wanted, and arc manipulation will be spared, arc length such as maintenance.
When b. receiving the arc-welding road and need change welding rod or stop arc, adopt reflow to receive the arc method,, make it form a slope, for good welding basis is laid in the striking of descending the root bead bar with the welding rod about 10mm of a side band arc backward.Or adopt 2 blow-out methods, can be beneficial to polishing and refuse, otherwise will easily form defective the shrinkage pore area to front surface.
C. after joint is polished into a circular arc type slope with electric angle grinder with arc crater, about 10mm place's striking after receiving the arc molten bath.Ignite and make little triangle arc manipulation forward behind the electric arc.Treat that electric arc arrives when receiving arc molten bath front end, electric arc presses down and sells and do to pause (about 2S), normally welds then.
In whole welding process, joint is crucial.Obtain good joint, must accomplish following 2 points:
1) arc crater polishing.Arc crater is polished into the slope of a circular arc, and grinding depth should reach weldering meat bottom.Such joint fuses well and is level and smooth, like the shaping of continuous welding joint.
2) grasp electric arc by exercise and press down the time.The overlong time joint is too high, and the time, too short formation joint disconnected.
Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 12mm.
(2) back bead
Polish off the tack welding solder joint earlier, begin welding again.The method of operating of back bead is identical with positive first road.Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 15mm.
The butt joint vertical position welding
Joint need be processed straight, removes dirts such as iron rust, oil, oxide skin with instruments such as file, emery cloth, wire brush or sanding machine (just, the back side) in the 20mm scope of abutment joint both sides, makes it to present the gloss of metal; When workpiece welds in assembling and positioning, employed welding rod during with formal welding employed welding rod identical.Figure three is seen at the two ends 10mm place of back of work in the position of tack welding; Beginning weldering end can suitably reduce counting of tack welding, and the weldering end must firm position eventually, diminishes and influences welding to prevent from because of the contraction in the welding process, to cause not weld intersegmental crack.When positioning weldering, leave allowance for shrinkage, promptly the gap of weld seam beginning weldering end is 3.0mm, and the weldering end is 3.2mm eventually.Welding rod is selected the straight elongated welding rod of J422 φ 2.5mm for use, requires welding rod to become damp and rotten, and core wire and electric contact are rustless, and coating must not ftracture and come off.With preceding drying to 350--400 ℃ constant temperature 2h.Adopt direct current source of welding current opposition method.
The workpiece fitted position is seen figure seven.Welding divides twice: together positive, reverse side together.The arc manipulation method is seen figure eight (a), is straight line moving (gap comparatively hour), or sees figure eight (b), is curve walking (when the gap is big).The welding level is seen figure nine, for two-layer.Welding condition sees Table 3.The weld appearance dimensional requirement sees Table 2.
(1) front welding bead
A. the striking electric arc that ignites at test specimen tack weld place is had a break, and about 2 seconds are then as the triangle arc manipulation that makes progress.Welding rod angle is 75 °-85 ° (angle of declinations).It is steady that gimmick is wanted, and arc manipulation will be spared, and controls onesize melting pool shape.
When b. receiving the arc-welding road and need change welding rod or stop arc, adopt reflow to receive the arc method,, make it form a slope, for good welding basis is laid in the striking of following root bead bar with the welding rod about 10mm decay of side band arc blow-out backward.Or adopt 2 blow-out methods, can be beneficial to polishing and refuse, otherwise will easily form defective the shrinkage pore area to the surface.
C. after joint is polished into a circular arc type slope with electric angle grinder with arc crater, about 10mm place's striking after receiving the arc molten bath.Ignite and make triangle arc manipulation forward behind the electric arc.When arriving receipts arc molten bath front end on electric arc, electric arc presses down and has a break (dead time is longer slightly than downhand welding), normally welds then.
Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 12mm.
(2) back bead
Polish off the tack welding solder joint earlier, begin welding again.The method of operating of back bead is identical with the front welding bead.Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 12mm.The speed of advancing is wanted uniformity, makes the weld seam height smooth, and width is even.
The butt joint horizontal position welding
Joint need be processed straight, removes dirts such as iron rust, oil, oxide skin with instruments such as file, emery cloth, wire brush or sanding machine (just, the back side) in the 20mm scope of abutment joint both sides, makes it to present the gloss of metal; When workpiece welds in assembling and positioning, employed welding rod during with formal welding employed welding rod identical.Figure three is seen at the two ends 10mm place of back of work in the position of tack welding; Beginning weldering end can suitably reduce counting of tack welding, and the weldering end must firm position eventually, diminishes and influences welding to prevent from because of the contraction in the welding process, to cause not weld intersegmental crack.When positioning weldering, leave allowance for shrinkage, promptly the gap of weld seam beginning weldering end is 3.0mm, and the weldering end is 3.2mm eventually.Welding rod is selected the straight elongated welding rod of J422 φ 2.5mm for use, requires welding rod to become damp and rotten, and core wire and electric contact are rustless, and coating must not ftracture and come off.With preceding drying to 350--400 ℃ constant temperature 2h.Adopt direct current source of welding current opposition method.
The workpiece fitted position is seen figure ten.Welding divides three roads: positive twice, and one arc manipulation method of reverse side seen figure 11, is the curve walking; The welding level is three layers, sees figure 12.Welding condition sees Table 4.The weld appearance dimensional requirement sees Table 2.
(1) positive first road
A. the striking electric arc that ignites in tack weld end, the test specimen left side, the oval arc manipulation of declivity on the work.Welding rod angle is 75 °-85 ° (welding rod angle of declinations), with the welding direction of advance angle be 80 °-85 °.Electric arc presses down, and makes electric arc arrive the back side of test specimen, allows slag flow out from the back side, and electric arc is brought to oblique upper.Make oblique oval arc manipulation successively as stated above.Welding direction from left to right.
When b. receiving the arc-welding road and need change welding rod or stop arc, adopt reflow to receive the arc method,, make it form a slope, for good welding basis is laid in the striking of descending the root bead bar with the welding rod about 10mm of a side band arc backward.Or adopt 2 blow-out methods, can be beneficial to polishing and refuse, otherwise will easily form defective the shrinkage pore area to front surface.
C. after joint is polished into a circular arc type slope with electric angle grinder with arc crater, about 10mm place's striking after receiving the arc molten bath.Ignite and make oblique ellipse arc manipulation forward behind the electric arc.When arriving receipts arc molten bath front end on electric arc, electric arc presses down and is with arc toward oblique below.When all arriving the groove base on electric arc, slag is made normal arc manipulation after flowing out from the back side.
The positive first road weld seam highly exceeds mother metal surface≤2mm by it.
(2) back bead
Polish off the tack welding solder joint earlier, begin welding again.The method of operating of back bead is identical with following first road.Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 12mm.
(3) final pass (positive second road)
Striking, receipts arc and joint main points are identical with positive first road.Welding direction from left to right, the straight line arc manipulation is not swung, the groove edge aim to be gone up by arc center, makes weld seam press the upper edge of the first road weld seam simultaneously.Speed of welding is faster slightly than the first road weld seam, and the speed of advancing is wanted uniformity, makes the weld seam height smooth, and width is even, keeps suitable welding rod angle and speed of welding, prevents undercut.
The present invention's specific embodiment sees Table 5,6,7.The present invention and old rule relatively see Table 8 (they are example with the vertical position welding of 8mm plate).
Table 1 downhand welding position technological parameter
| The welding level | Core diameter | Welding current (A) | Weldingvoltage (V) | Speed of welding (cm/min) |
| 1 | 2.5 | 155～165 | 25-30 | 9-11 |
| 2 | 2.5 | 155～165 | 25-30 | 12-13 |
Table 2 weld appearance dimensional requirement (mm)
| Weld seam | Weld width | Reinforcement | Reinforcement is poor | Other requirements |
| Positive | 15～18 | 0～2 | ≤1.5 | Evenly neat slick and sly |
| The back side | 15～18 | 0～2 | ≤1.5 | Evenly neat slick and sly |
Table 3 vertical position welding position technological parameter
| The welding level | Core diameter | Welding current (A) | Weldingvoltage (V) | Speed of welding (cm/min) |
| 1 | 2.5 | 95～105 | 20-25 | 8-10 |
| 2 | 2.5 | 95～105 | 20-25 | 12-13 |
Table 4 slot welding position technological parameter
| The welding level | Core diameter | Welding current (A) | Weldingvoltage (V) | Speed of welding (cm/min) |
| 1 | 2.5 | 125～435 | 25-30 | 9-10 |
| 2 | 2.5 | 115～125 | 25-30 | 12-13 |
| 3 | 2.5 | 105～115 | 25-30 | 11-12 |
Table 5 8mmQ235-A steel plate welding condition
Table 6 10mmQ235-A steel plate welding condition
Table 7 12mmQ235-A steel plate welding condition
The new old technology contrast of table 8 8mm plate vertical position welding
| Mother metal | Q235-A | Q235-A |
| Welding material | 1422 straight elongated welding rods | The conventional welding rod of CHE422 |
| Core diameter | φ2.5mm | φ3.2mm |
| Slope type | The I type | V-type |
| Bevel angle | 0 | 60° |
| Root face | 8mm | 1.0～1.5mm |
| The gap | 3.0～3.2mm | 3.0～3.2mm |
| The welding number of | 1 | 2 |
| Welding current | 95A | 80～90A |
| Arc voltage | 22V | 22V |
| Weld interval | 5’6” | 13’07” |
| Amount to the time spent | 6’06” | 14”08” |
| The welding rod consumption | 99 grams | 265 grams |
Claims (10)
1, a kind of welding procedure is characterized in that adopting straight elongated continuous welding rod, I type groove welding 8-12mm cut deal.
2, as claims 1 described welding procedure, it is characterized in that described I type groove is a vertical type for the groove section, remove out controlling angle groove (also claiming double V-groove) from.
3,, it is characterized in that adopting linked arc method welding by both sides double-faced forming (or single face welding and double face shaping weldering 8mm plate) as claims 1 described welding procedure; Remove out the welding of controlling angle groove from.
4, as claims 1 described welding procedure, it is characterized in that welding rod is a carbon steel core, mother metal is that C-Mn is a carbon steel.
5, as claims 1 described welding procedure, it is characterized in that welding rod is the carbon steel or low alloy steel core, mother metal is a low-alloy high-strength steel.
6, as claims 1 described welding procedure, it is characterized in that welding rod is carbon steel or chrome molybdenum steel core, mother metal is a heat resisting steel.
7, as claims 1 described welding procedure, it is characterized in that welding rod is stainless steel core, mother metal is a stainless steel.
8, as claims 1,2,3,4,5,6 described welding procedures is characterized in that the welding procedure of downhand welding position is:
Joint need be processed straight, removes dirts such as iron rust, oil, oxide skin with instruments such as file, emery cloth, wire brush or sanding machine (just, the back side) in the 20mm scope of abutment joint both sides, makes it to present the gloss of metal; When workpiece welds in assembling and positioning, employed welding rod during with formal welding employed welding rod identical.The position of tack welding is at the two ends 10mm place of back of work, and beginning weldering end can suitably reduce counting of tack welding, and the weldering end must firm position eventually, diminishes and influences welding to prevent from because of the contraction in the welding process, to cause not weld intersegmental crack.When positioning weldering, leave allowance for shrinkage, promptly the gap of weld seam beginning weldering end is 3.0mm, and the weldering end is 3.2mm eventually.Welding rod is selected the straight elongated welding rod of J422 φ 2.5mm for use, requires welding rod to become damp and rotten, and core wire and electric contact are rustless, and coating must not ftracture and come off.With preceding drying to 350--400 ℃ constant temperature 2h.Adopt direct current source of welding current opposition method.
Welding divides twice: together positive, reverse side together.The arc manipulation method is straight line moving (gap comparatively hour) or curve walking (when the gap is big).
1. front welding bead
A. the striking electric arc that ignites at test specimen tack weld place is had a break, and about 2S makes little triangle arc manipulation forward then.Welding rod angle is 80 °～90 ° (with the angle of welding direction).It is steady that gimmick is wanted, and arc manipulation will be spared, arc length such as maintenance.
When b. receiving the arc-welding road and need change welding rod or stop arc, adopt reflow to receive the arc method,, make it form a slope, for good welding basis is laid in the striking of descending the root bead bar with the welding rod about 10mm of a side band arc backward.Or adopt 2 blow-out methods, can be beneficial to polishing and refuse, otherwise will easily form defective the shrinkage pore area to front surface.
C. after joint is polished into a circular arc type slope with electric angle grinder with arc crater, about 10mm place's striking after receiving the arc molten bath.Ignite and make little triangle arc manipulation forward behind the electric arc.Treat that electric arc arrives when receiving arc molten bath front end, electric arc presses down and sells and do to pause (about 2S), normally welds then.
In whole welding process, joint is crucial.Obtain good joint, must accomplish following 2 points:
1) arc crater polishing.Arc crater is polished into the slope of a circular arc, and grinding depth should reach weldering meat bottom.Such joint fuses well and is level and smooth, like the shaping of continuous welding joint.
2) grasp electric arc by exercise and press down the time.The overlong time joint is too high, and the time, too short formation joint disconnected.
Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 12mm.
2. back bead
Polish off the tack welding solder joint earlier, begin welding again.The method of operating of back bead is identical with positive first road.Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 15mm.
9, according to claims 1,2,3,4,5,6 described welding procedures is characterized in that the welding procedure of vertical position welding position is:
Joint need be processed straight, removes dirts such as iron rust, oil, oxide skin with instruments such as file, emery cloth, wire brush or sanding machine (just, the back side) in the 20mm scope of abutment joint both sides, makes it to present the gloss of metal; When workpiece welds in assembling and positioning, employed welding rod during with formal welding employed welding rod identical.The position of tack welding is at the two ends 10mm place of back of work, and beginning weldering end can suitably subtract in the 20mm scope of seam both sides (just, the back side) and remove dirts such as iron rust, oil, oxide skin, makes it to present the gloss of metal; When workpiece welds in assembling and positioning, employed welding rod during with formal welding employed welding rod identical.The position of tack welding is at the two ends 10mm place of back of work, and beginning weldering end can suitably reduce counting of tack welding, and the weldering end must firm position eventually, diminishes and influences welding to prevent from because of the contraction in the welding process, to cause not weld intersegmental crack.When positioning weldering, leave allowance for shrinkage, promptly the gap of weld seam beginning weldering end is 3.0mm, and the weldering end is 3.2mm eventually.Welding rod is selected the straight elongated welding rod of J422 φ 2.5mm for use, requires welding rod to become damp and rotten, and core wire and electric contact are rustless, and coating must not ftracture and come off.With preceding drying to 350--400 ℃ constant temperature 2h.Adopt direct current source of welding current opposition method.
Welding divides three roads: positive twice, and reverse side one, the arc manipulation method is the curve walking, the welding level is three layers.
1. positive first road
A. the striking electric arc that ignites in tack weld end, the test specimen left side, the oval arc manipulation of declivity on the work.Welding rod angle is 75 °-85 ° (welding rod angle of declinations), with the welding direction of advance angle be 80 °-85 °.Electric arc presses down, and makes electric arc arrive the back side of test specimen, allows slag flow out from the back side, and electric arc is brought to oblique upper.Make oblique oval arc manipulation successively as stated above.Welding direction from left to right.
When b. receiving the arc-welding road and need change welding rod or stop arc, adopt reflow to receive the arc method,, make it form a slope, for good welding basis is laid in the striking of descending the root bead bar with the welding rod about 10mm of a side band arc backward.Or adopt 2 blow-out methods, can be beneficial to polishing and refuse, otherwise will easily form defective the shrinkage pore area to front surface.
C. after joint is polished into a circular arc type slope with electric angle grinder with arc crater, about 10mm place's striking after receiving the arc molten bath.Ignite and make oblique ellipse arc manipulation forward behind the electric arc.When arriving receipts arc molten bath front end on electric arc, electric arc presses down and is with arc toward oblique below.When all arriving the groove base on electric arc, slag is made normal arc manipulation after flowing out from the back side.
The positive first road weld seam highly exceeds mother metal surface≤2mm by it.
2. back bead
Polish off the tack welding solder joint earlier, begin welding again.The method of operating of back bead is identical with following first road.Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 12mm.Counting of few tack welding, the weldering end must firm position eventually, diminishes and influences welding to prevent from because of the contraction in the welding process, to cause not weld intersegmental crack.When positioning weldering, leave allowance for shrinkage, promptly the gap of weld seam beginning weldering end is 3.0mm, and the weldering end is 3.2mm eventually.Welding rod is selected the straight elongated welding rod of J422 φ 2.5mm for use, requires welding rod to become damp and rotten, and core wire and electric contact are rustless, and coating must not ftracture and come off.With preceding drying to 350--400 ℃ constant temperature 2h.Adopt direct current source of welding current opposition method.
Welding divides twice: together positive, reverse side together.The arc manipulation method is straight line moving (gap comparatively hour) or curve walking (when the gap is big), and the welding level is two-layer.
1. front welding bead
A. the striking electric arc that ignites at test specimen tack weld place is had a break, and about 2 seconds are then as the triangle arc manipulation that makes progress.Welding rod angle is 75 °-85 ° (angle of declinations).It is steady that gimmick is wanted, and arc manipulation will be spared, and controls onesize melting pool shape.
When b. receiving the arc-welding road and need change welding rod or stop arc, adopt reflow to receive the arc method,, make it form a slope, for good welding basis is laid in the striking of following root bead bar with the welding rod about 10mm decay of side band arc blow-out backward.Or adopt 2 blow-out methods, can be beneficial to polishing and refuse, otherwise will easily form defective the shrinkage pore area to the surface.
C. after joint is polished into a circular arc type slope with electric angle grinder with arc crater, about 10mm place's striking after receiving the arc molten bath.Ignite and make triangle arc manipulation forward behind the electric arc.When arriving receipts arc molten bath front end on electric arc, electric arc presses down and has a break (dead time is longer slightly than downhand welding), normally welds then.
Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 12mm.
2. back bead
Polish off the tack welding solder joint earlier, begin welding again.The method of operating of back bead is identical with the front welding bead.Weld bead height should exceed mother metal surface≤2.0mm, and weld width is controlled at about 12mm.The speed of advancing is wanted uniformity, makes the weld seam height smooth, and width is even.
10, according to claims 1,2,3,4,5,6 described welding procedures is characterized in that the welding procedure of horizontal position welding position is:
Joint need be processed straight, is docking with instruments such as file, emery cloth, wire brush or sanding machines
3. final pass (positive second road)
Striking, receipts arc and joint main points are identical with positive first road.Welding direction from left to right, the straight line arc manipulation is not swung, the groove edge aim to be gone up by arc center, makes weld seam press the upper edge of the first road weld seam simultaneously.Speed of welding is faster slightly than the first road weld seam, and the speed of advancing is wanted uniformity, makes the weld seam height smooth, and width is even, keeps suitable welding rod angle and speed of welding, prevents undercut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97108808A CN1188031A (en) | 1997-01-15 | 1997-01-15 | Square groove welding technology for welding 8-12 mm middle-thick plate by continuous welding rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97108808A CN1188031A (en) | 1997-01-15 | 1997-01-15 | Square groove welding technology for welding 8-12 mm middle-thick plate by continuous welding rod |
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| CN1188031A true CN1188031A (en) | 1998-07-22 |
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| CN103785932A (en) * | 2012-11-01 | 2014-05-14 | 上海振华重工(集团)股份有限公司 | Large-gap back-chipping-free welding process for I-shaped groove of middle thick plate |
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- 1997-01-15 CN CN97108808A patent/CN1188031A/en active Pending
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| CN103692054A (en) * | 2013-12-17 | 2014-04-02 | 鞍钢重型机械有限责任公司 | CO2 gas shielded welding operation method for vertical weld joint |
| CN103692054B (en) * | 2013-12-17 | 2016-06-01 | 鞍钢重型机械有限责任公司 | The CO of a kind of vertical position welding seam2The working method of shielded welding |
| CN106513940A (en) * | 2017-01-18 | 2017-03-22 | 中电环宇（北京）建设工程有限公司 | Novel method for welding process metal pipeline |
| CN106513940B (en) * | 2017-01-18 | 2019-08-06 | 中电环宇（北京）建设工程有限公司 | A kind of novel process metal method for welding pipeline |
| CN113664343A (en) * | 2021-09-02 | 2021-11-19 | 内蒙古第一机械集团股份有限公司 | Double-wire welding method for armor material GY4 |
| CN113770600A (en) * | 2021-09-23 | 2021-12-10 | 浙江国际海运职业技术学院 | Vertical fillet weld semi-automatic welding mechanism |
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