CN107009002B - The accurate control automatic argon arc pipe welding method of stainless steel pipe - Google Patents

The accurate control automatic argon arc pipe welding method of stainless steel pipe Download PDF

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Publication number
CN107009002B
CN107009002B CN201710157731.0A CN201710157731A CN107009002B CN 107009002 B CN107009002 B CN 107009002B CN 201710157731 A CN201710157731 A CN 201710157731A CN 107009002 B CN107009002 B CN 107009002B
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Prior art keywords
stainless steel
steel pipe
weldment
tungsten electrode
welded
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CN107009002A (en
Inventor
刘泽敏
顾洪涛
曹明
孙亚非
谢屹
林忠
唐磊
刘生建
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Shanghai Institute of Space Propulsion
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Shanghai Institute of Space Propulsion
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/16Arc welding or cutting making use of shielding gas
    • B23K9/167Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/12Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
    • B23K31/125Weld quality monitoring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/235Preliminary treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/04Tubular or hollow articles
    • B23K2101/06Tubes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00Materials to be soldered, welded or cut
    • B23K2103/02Iron or ferrous alloys
    • B23K2103/04Steel or steel alloys

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Quality & Reliability (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The present invention provides a kind of accurate control automatic argon arc pipe welding methods of stainless steel pipe, include the following steps: to select two stainless steel pipes as the first weldment and the second weldment, carry out stainless steel pipe inner wall and surface degreasing respectively;Conduit drying;First to-be-welded pieces and the second weldment docking place end face to be welded, surfaces externally and internally are carried out being mechanical grinding to visible metallochrome;Spot welding positioning is carried out to the weld seam of the first to-be-welded pieces and the second weldment;3 fixture block tooling of Φ is selected, weldment is clamped in pipe soldering turret;Handle tungsten electrode tip;Tungsten electrode and adjustment tungsten electrode tip height are installed;Curent change is arranged in welding process subangle.The present invention solves the automatic argon arc pipe weldering of stainless steel pipe Φ 3*1mm, and welding point meets I grades of QJ2865-97 requirements, and conduit is penetrated and do not blocked up, and passes through weld properties test, face of weld recess and X-ray examination and weld seam sealing propertytest.

Description

The accurate control automatic argon arc pipe welding method of stainless steel pipe
Technical field
The present invention relates to the automatic argon arc pipe welderings of Hall electric propulsion general assembly stainless steel pipe, and in particular, to a kind of accurate Control the automatic argon arc pipe welding method of stainless steel pipe Φ 3*1mm.
Background technique
The accurate and stable automatic argon arc pipe welding line fusion penetration of control stainless steel pipe Φ 3*1mm is always welding field Difficult point and hot issue, should guarantee that conduit weld seam penetrates, and guarantee that conduit does not block up again, and weldquality need to meet QJ2865- 97I grades of requirements.
According to conduit pressure-bearing operating condition, weld seam is subjected to the weld seam leakproofness inspection of " 2~5MPa helium inspection, 5min is kept not reveal " It looks into.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of accurate control automatic argon arcs of stainless steel pipe Pipe welding method.
The present invention is realized by the following scheme:
A kind of accurate control automatic argon arc pipe welding method of stainless steel pipe, includes the following steps:
S1, it selects two stainless steel pipes as the first weldment and the second weldment, carries out stainless steel pipe inner wall respectively And surface degreasing;
S2, the stainless steel pipe after oil removing is dried;
S3, the first to-be-welded pieces and the second weldment are docked place end face to be welded, surfaces externally and internally is mechanical grinding to can See metallochrome;
S4, spot welding positioning is carried out to the weld seam of the first to-be-welded pieces and the second weldment;
S5, after the first to-be-welded pieces and the second weldment are fixed on 3 fixture block of Φ so that part axial to be welded bounce≤Φ 0.10mm;
S6, processing tungsten electrode tip;
S7, installation tungsten electrode and adjustment tungsten electrode tip height;
Curent change is arranged in S8, welding process subangle.
Preferably, the step S4 specifically: under positioning wedged block limit, by the first to-be-welded pieces and the second weldment Weld seam symmetrically positions at 2 points, end face or axial direction unfitness of butt joint≤0.10mm, gap≤0.10mm.
Preferably, the corresponding welding condition of the step S4 are as follows: 6~10A of electric current, 4~8L/min of argon flow.
Preferably, the step S6 specifically: tungsten electrode diameter of phi is 1mm, and tip is 30 °, tungsten electrode scaling loss and change in shape It requires to avoid the variation of shape that arc shape is caused to change again with special equipment polishing tungsten electrode tip to 30 °, influence electric arc Power and heat input to base material.
Preferably, the step 7 specifically: tungsten electrode tip is placed in right above workpiece place to be welded, apart from workpiece place to be welded 2~3mm of surface.
Preferably, the step S8 specifically: speed of welding: 8r/min;Frequency: 70Hz;Pulsewidth 33%;Electric current base value: 4A;Three sections of welding process point, corresponding angle are 200 °, 360 °, 160 °, and current peak is 23A, 21A, 20A respectively;Weldering In termination process, first stage peak point current act on when, stainless steel pipe formed molten bath, but and it is lack of penetration, belong to warm-up phase;The When two-stage peak point current acts on, stainless steel pipe 1mm wall thickness is gradually penetrated;The effect of phase III peak point current, weld seam ending Duan Nengliang gradually decays, and forms smooth, nonpitting appearance of weld.
Preferably, further include following steps after the step S4: quality examination is carried out to the solder joint of spot welding.
Preferably, further include following steps:
Quality examination is carried out to weld seam, specifically, welding depression is no more than 0.1mm, does not allow undercut;Face of weld is not permitted Perhaps there is visual visible crackle, stomata, tungsten inclusion and non-metallic inclusion;Weld seam does not allow to deposit through X-ray examination inside weld seam In crackle, incomplete fusion and lack of penetration;It is examined by 2~5MPa helium, the weld seam leak check for keeping 5min not reveal.
First to-be-welded pieces and the second to-be-welded pieces are stainless steel 1Cr18Ni9Ti Φ 3*1mm conduit.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, the present invention solves small stainless steel pipe Φ 3*1mm automatic argon arc pipe weldering difficult point, using double-round bond pattern, Thermal weld stress amount is gradually reduced, it is ensured that welding process weldering leakage is stablized, and weldquality meets QJ2865-97I grades of requirements, and passes through Corresponding leakproofness examination;
2, the invention avoids the stainless steels that the defects of lack of penetration, stomata, crackle, trailing end arc crater recess and crackle generates The technological parameter of the automatic argon arc pipe weldering of conduit Φ 3*1mm, had both guaranteed that conduit penetrated, while guaranteeing that weld seam does not block up, and had met Hall electricity Promote general assembly stainless steel pipe applying working condition demand;
3, spot-welding equipment and the use of 3 fixture block of Φ and clamping in the present invention, it is ensured that assemble shape before stainless steel pipe Φ 3*1mm weldering Weld is accepted rate is improved in state, end face or axial direction unfitness of butt joint≤0.10mm, gap≤0.10mm.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention, Objects and advantages will become more apparent upon:
Fig. 1 is the flow chart that the embodiment of the present invention accurately controls the automatic argon arc pipe welding method of stainless steel pipe.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention Protection scope.
As shown in Figure 1, the embodiment of the invention provides a kind of automatic argon arc pipes of accurate control stainless steel pipe to weld welding side Method includes the following steps:
S1, select two stainless steel 1Cr18Ni9Ti Φ 3*1mm conduits as the first weldment and the second weldment, respectively into Row stainless steel pipe inner wall and surface degreasing;
S2, the stainless steel pipe after oil removing is dried;
S3, the first to-be-welded pieces and the second weldment are docked place end face to be welded, surfaces externally and internally is mechanical grinding to can See metallochrome;
S4, spot welding positioning, corresponding welding condition are carried out to the weld seam of the first to-be-welded pieces and the second weldment are as follows: 6~10A of electric current, 4~8L/min of argon flow;Specifically: under positioning wedged block limit, the first to-be-welded pieces and second are welded The weld seam of part symmetrically positions at 2 points, end face or axial direction unfitness of butt joint≤0.10mm, gap≤0.10mm, and carries out to the solder joint of spot welding Quality examination;S5, after the first to-be-welded pieces and the second weldment are fixed on 3 fixture block of Φ so that part axial to be welded bounce≤ Φ0.10mm;
S6, processing tungsten electrode tip;Specifically: tungsten electrode diameter of phi is 1mm, and tip is 30 °, and tungsten electrode scaling loss and change in shape are all It needs to avoid the variation of shape that arc shape is caused to change again with special equipment polishing tungsten electrode tip to 30 °, influence arc force And the heat input to base material.
S7, installation tungsten electrode and adjustment tungsten electrode tip height;The step S7 specifically: it is to be welded that tungsten electrode tip is placed in workpiece Right above place, apart from workpiece 2~3mm of place surface to be welded;
Curent change is arranged in S8, welding process subangle;Specifically: speed of welding: 8r/min;Frequency: 70Hz;Pulsewidth 33%;Electric current base value: 4A;Three sections of welding process point, corresponding angle are 200 °, 360 °, 160 °, and current peak is respectively 23A,21A,20A;In welding process, first stage peak point current act on when, stainless steel pipe formed molten bath, but and it is lack of penetration, Belong to warm-up phase;When second stage peak point current acts on, stainless steel pipe 1mm wall thickness is gradually penetrated;Phase III peak value electricity Stream effect, weld seam ending section energy are gradually decayed, and smooth, nonpitting appearance of weld is formed.
Quality examination is carried out to weld seam, specifically, welding depression is no more than 0.1mm, does not allow undercut;Face of weld is not permitted Perhaps there is visual visible crackle, stomata, tungsten inclusion and non-metallic inclusion;Weld seam does not allow to deposit through X-ray examination inside weld seam In crackle, incomplete fusion and lack of penetration;It is examined by 2~5MPa helium, the weld seam leak check for keeping 5min not reveal.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow Ring substantive content of the invention.

Claims (7)

1. a kind of accurate control automatic argon arc pipe welding method of stainless steel pipe, which comprises the steps of:
S1, it selects two stainless steel pipes as the first weldment and the second weldment, carries out stainless steel pipe inner wall and table respectively Face oil removing;
S2, the stainless steel pipe after oil removing is dried;
S3, the first to-be-welded pieces and the second weldment docking place end face to be welded, surfaces externally and internally are carried out being mechanical grinding to visible gold Belong to color;
S4, spot welding positioning is carried out to the weld seam of the first to-be-welded pieces and the second weldment;
S5, after the first to-be-welded pieces and the second weldment are fixed on 3 fixture block of Φ so that part axial to be welded bounce≤Φ 0.10mm;
S6, processing tungsten electrode tip;The step S6 specifically: tungsten electrode diameter of phi is 1mm, and tip is 30 °, tungsten electrode scaling loss and shape Variation requires to avoid the variation of shape that arc shape is caused to change again with special equipment polishing tungsten electrode tip to 30 °, influence Arc force and heat input to base material;
S7, installation tungsten electrode and adjustment tungsten electrode tip height;
Curent change is arranged in S8, welding process subangle;
The step S8 specifically: speed of welding: 8r/min;Frequency: 70Hz;Pulsewidth 33%;Electric current base value: 4A;Welding process Divide three sections, corresponding angle is 200 °, 360 °, 160 °, and current peak is 23A, 21A, 20A respectively;In welding process, the One stage peak point current act on when, stainless steel pipe formed molten bath, but and it is lack of penetration, belong to warm-up phase;Second stage peak value When the function of current, stainless steel pipe 1mm wall thickness is gradually penetrated;The effect of phase III peak point current, weld seam finish up section energy gradually Decaying forms smooth, nonpitting appearance of weld;
The specification of the stainless steel pipe is Φ 3*1mm.
2. the accurate automatic argon arc pipe welding method of control stainless steel pipe according to claim 1, which is characterized in that institute State step S4 specifically: under positioning wedged block limit, the weld seam of the first to-be-welded pieces and the second weldment is symmetrically positioned at 2 points, End face or axial direction unfitness of butt joint≤0.10mm, gap≤0.10mm.
3. the accurate automatic argon arc pipe welding method of control stainless steel pipe according to claim 1, which is characterized in that institute State the corresponding welding condition of step S4 are as follows: 6~10A of electric current, 4~8L/min of argon flow.
4. the accurate automatic argon arc pipe welding method of control stainless steel pipe according to claim 1, which is characterized in that institute State S7 specifically: tungsten electrode tip is placed in right above workpiece place to be welded, apart from workpiece 2~3mm of place surface to be welded.
5. the accurate automatic argon arc pipe welding method of control stainless steel pipe according to claim 1, which is characterized in that Further include following steps after the step S4: quality examination is carried out to the solder joint of spot welding.
6. the accurate automatic argon arc pipe welding method of control stainless steel pipe according to claim 1, which is characterized in that also Include the following steps:
Quality examination is carried out to weld seam, specifically, welding depression is no more than 0.1mm, does not allow undercut;Face of weld does not allow to deposit In visual visible crackle, stomata, tungsten inclusion and non-metallic inclusion;Weld seam does not allow to exist inside weld seam and split through X-ray examination Line, incomplete fusion and lack of penetration;It is examined by 2~5MPa helium, the weld seam leak check for keeping 5min not reveal.
7. the accurate automatic argon arc pipe welding method of control stainless steel pipe according to claim 1, which is characterized in that institute It states the first to-be-welded pieces and the second to-be-welded pieces is stainless steel 1Cr18Ni9Ti Φ 3*1mm conduit.
CN201710157731.0A 2017-03-16 2017-03-16 The accurate control automatic argon arc pipe welding method of stainless steel pipe Active CN107009002B (en)

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CN107234319B (en) * 2017-07-14 2020-01-21 台州金龙大丰水暖股份有限公司 Welding process for coiled pipe of thin stainless steel corrugated pipe
CN108031950B (en) * 2017-11-02 2021-07-20 中国航发哈尔滨东安发动机有限公司 Circumferential welding method for thin-wall pipeline parts
CN110434416B (en) * 2018-07-04 2020-07-28 中国原子能科学研究院 Method for welding different material welding parts of vacuum chamber of superconducting cyclotron
CN109047998B (en) * 2018-08-14 2020-09-04 上海空间推进研究所 Method for improving automatic argon arc welding forming quality and production efficiency of system pipeline
CN108941959A (en) * 2018-08-14 2018-12-07 上海空间推进研究所 A kind of method of accurate control Φ 3mm stainless steel pipe argonaut welding forming quality
CN110000452A (en) * 2019-05-06 2019-07-12 上海空间推进研究所 Propulsion system leads to argonaut welding tooling application method under class component protective atmosphere
CN110508909B (en) * 2019-08-07 2021-07-09 哈电集团(秦皇岛)重型装备有限公司 Welding system and method for stainless steel pipe butt joint automatic superposition pulse single-pass welding

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JPH0352775A (en) * 1989-07-20 1991-03-06 Sumitomo Metal Ind Ltd Circumferential welding method for stainless steel pipe
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CN102489842A (en) * 2011-12-07 2012-06-13 鞍山锅炉厂有限公司 Argon tungsten-arc welding process for pearlite heat-resistant steel pipe and austenitic heat-resistant steel pipe
CN102554418A (en) * 2012-02-16 2012-07-11 山东大学 Microbeam tungsten argon arc welding method for magnesium alloy thin-walled tube
CN104972213A (en) * 2015-05-25 2015-10-14 北京控制工程研究所 Installing and clamping tool and method for conducting capillary tube welding through installing and clamping tool
CN106312262A (en) * 2016-10-20 2017-01-11 西安华杰管道有限公司 TIG welding technique for butt welding of thin-walled stainless steel tubes

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Publication number Priority date Publication date Assignee Title
JPH0352775A (en) * 1989-07-20 1991-03-06 Sumitomo Metal Ind Ltd Circumferential welding method for stainless steel pipe
JP2003136242A (en) * 2001-11-02 2003-05-14 Babcock Hitachi Kk Tig arc welding apparatus
CN102489842A (en) * 2011-12-07 2012-06-13 鞍山锅炉厂有限公司 Argon tungsten-arc welding process for pearlite heat-resistant steel pipe and austenitic heat-resistant steel pipe
CN102554418A (en) * 2012-02-16 2012-07-11 山东大学 Microbeam tungsten argon arc welding method for magnesium alloy thin-walled tube
CN104972213A (en) * 2015-05-25 2015-10-14 北京控制工程研究所 Installing and clamping tool and method for conducting capillary tube welding through installing and clamping tool
CN106312262A (en) * 2016-10-20 2017-01-11 西安华杰管道有限公司 TIG welding technique for butt welding of thin-walled stainless steel tubes

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