CN105081538B - Process for automatically welding small-specification thin-walled tube and small-holed axle tube plate - Google Patents

Process for automatically welding small-specification thin-walled tube and small-holed axle tube plate Download PDF

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Publication number
CN105081538B
CN105081538B CN201510524541.9A CN201510524541A CN105081538B CN 105081538 B CN105081538 B CN 105081538B CN 201510524541 A CN201510524541 A CN 201510524541A CN 105081538 B CN105081538 B CN 105081538B
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Prior art keywords
welding
tube
pipe
tungsten electrode
tube sheet
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CN105081538A (en
Inventor
杨松
谢彦武
王莉
赵福冬
宋志鹏
邹迪婧
王新娟
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Harbin Electric Group Qinhuangdao Heavy Equipment Co Ltd
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Harbin Electric Group Qinhuangdao Heavy Equipment Co Ltd
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Classifications

    • 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
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0205Non-consumable electrodes; C-electrodes
    • 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
    • B23K9/09Arrangements or circuits for arc welding with pulsed current or voltage
    • 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
    • B23K9/095Monitoring or automatic control of welding parameters
    • 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
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/04Tubular or hollow articles
    • B23K2101/14Heat exchangers

Abstract

The invention discloses a process for automatically welding a small-specification thin-walled tube and a small-holed axle tube plate. The process comprises the steps of machining the position to be welded of the axle tube into a groove, assembling and positioning the tube and the tube plate, installing and debugging a welding device, inputting welding process parameters, starting to perform welding and performing cleaning before welding and in the welding process. The process for automatically welding the small-specification thin-walled tube and the small-holed axle tube plate is integrated with a specific tube and tube plate joint structure, specific welding process parameters and tungsten electrode selection and is suitable for welding between the tube with the outer diameter less than 10 mm and the tube wall thickness less than 1 mm and the tube plate with a tube axle less than 3 mm, so that the sealing performance of a welding joint is good, the welding quality is high, the welding process is stable and reliable, formed welds are uniform and attractive in appearance, the root portion is fused well, the welding efficiency is high, and nondestructive inspection and physical and chemical performance testing results show that the requirement for welding quality of tubes and tube plates of main devices in a nuclear island is met.

Description

Small dimension light-wall pipe and aperture bridge tube plate automatic soldering technique
Technical field
The present invention relates to tube to tube sheet welding technique, and in particular to a kind of small dimension light-wall pipe and aperture bridge tube plate automatic welding Connect technique.
Background technology
Tube to tube sheet welding is widely used in the manufacturing of the devices such as heat exchanger, and pipe is with tube sheet joint in running It is middle occur leakage be heat exchanger cisco unity malfunction main cause, for different size, the exchanger tubes and tubesheets of material, be up to To good welding quality and product requirement is met, specific weld technique with matching need to be adopted.
So far, the welding between small dimension light-wall pipe and aperture bridge tube plate still has great difficulty, especially external diameter Less than 10mm, pipe thickness is less than the welding between the tube sheet of 3mm less than the pipe and pipe bridge of 1mm, there is presently no more ripe Technology, especially automatic welding technique, this is more quick mainly due to one side small dimension light-wall pipe welding parameters Sense, welding parameter is debugged and welding operation difficulty is larger, and in welding, easily weldering is leaked or generation pipe end varus, weld seam are uneven etc. , on the other hand when bridge spacing is less, easily there is weld seam overlap joint in defect, and welding quality is wayward.
The products such as nuclear island primary device steam generator, residual heat removal exchanger are designed with exchanger tubes and tubesheets welding, Mostly small dimension light-wall pipe, pipe bridge spacing is little, and heat exchanger tube quantity is more, and human weld's efficiency is low and difficult quality guarantee, and core Island main equipment is high to tube to tube sheet welding prescription, and common process is difficult to reach standard, therefore, need exploitation badly and be adapted therewith Automatic soldering technique.
Due to the presence of the problems referred to above in prior art, the present inventor is ground to existing tube to tube sheet welding technology Study carefully, to work out appearance of weld uniformly, a kind of efficient, the stable small dimension light-wall pipe of welding process and aperture bridge tube plate are automatic Welding procedure.
The content of the invention
In order to overcome the problems referred to above, present inventor has performed studying with keen determination, design suitable for external diameter less than 10mm, tube wall Thickness less than 1mm pipe and pipe bridge less than 3mm tube sheet between automatic soldering technique, it is ensured that welding process is stable, weld seam into Shape is uniformly attractive in appearance, and is obtained in that the welding quality for meeting nuclear island product requirement.
It is an object of the invention to provide small dimension light-wall pipe and aperture bridge tube plate automatic soldering technique, the technique includes:
Step 1), tube sheet position to be welded is processed into into groove;
Step 2), pipe is assembled with tube sheet, and is positioned;
Step 3), install, debug welding equipment, be input into welding condition;
Step 4), start welding, be cleaned before welding and in welding process.
The present invention is had the advantage that to be included:
(1) the small dimension light-wall pipe that the present invention is provided adopts specific pipe and tube sheet with aperture bridge tube plate automatic soldering technique Joint design is assembled, there is provided suitable molten bath volume and melting pool shape, while ensureing that fusion penetration and penetration are good, improves welding Quality;
(2) the small dimension light-wall pipe that the present invention is provided adopts pulse TIG automatic weldings with aperture bridge tube plate automatic soldering technique Connection device, is conducive to adjusting welding energy and control melting pool shape, makes circular weld uniform in shaping, and welding process is efficient, stable;
(3) the small dimension light-wall pipe that the present invention is provided is adopted with aperture bridge tube plate automatic soldering technique specific model and chi Very little tungsten electrode, and choose suitable tungsten electrode position and angle so that weld seam has larger fusion penetration and less molten wide, is being suitable for Welding condition under be effectively guaranteed sidewall fusion;
(4) the small dimension light-wall pipe that the present invention is provided is combined specific pipe and tube sheet with aperture bridge tube plate automatic soldering technique Joint design, specific welding condition and tungsten electrode are selected, it is adaptable to which external diameter is less than 10mm, pipe of the pipe thickness less than 1mm With the welding between tube sheet of the pipe bridge less than 3mm so that welding point good airproof performance, welding quality are high, process stabilization is reliable, weldering It is seamed into the uniform attractive in appearance, root of shape and fuses good, welding efficiency height, and Jing items nondestructive testings and physicochemical property test, its result Meet nuclear island primary device tube to tube sheet welding prescription.
Description of the drawings
Fig. 1 illustrates the structural representation according to a kind of pipe of preferred implementation of the invention with tube sheet joint;
Fig. 2 is illustrated according to a kind of structural representation of the tungsten electrode of preferred implementation of the invention.
Drawing reference numeral explanation:
1- tube sheets
2- is managed
3- groove faces
A- groove depths
The length of the end face protruded tube plate face of B- pipes
4- tungsten electrode bars
5- tungsten electrodes end circular cone
6- tips platform
Specific embodiment
Below by drawings and Examples, the present invention is described in more detail.By these explanations, the characteristics of of the invention To become more apparent from clearly with advantage.
According to the present invention, there is provided small dimension light-wall pipe and aperture bridge tube plate automatic soldering technique, the technique include following step Suddenly:
Step 1), tube sheet position to be welded is processed into into groove.
In a preferred embodiment in accordance with the present invention, as shown in figure 1, by the machining of drilling of 1 side of tube sheet into monolateral " V " Type groove, " V " the type groove include groove face 3, and the groove face 3 is 30 °~45 ° with tube bore axis angulation, described Groove depth A of " V " type groove is 1~1.2mm, above-mentioned " V " type groove for coordinate the specific weld technique that provides of the present invention and The light-wall pipe of specific standard and aperture bridge tube plate and arrange, there is provided suitable molten bath volume and melting pool shape, while ensureing fusion penetration And penetration is good so that complete molten bath is formed at welding point and the mouth of pipe occurs without excessive inside contracting.
The automatic soldering technique that the present invention is provided is applied to tube sheet of the bridge length less than 3mm, and the material of the tube sheet is SA-182 F304L steel.
Step 2), pipe is assembled with tube sheet, and is positioned.
In a preferred embodiment in accordance with the present invention, pipe and tube sheet are carried out into Hydraulic expansion-jointing positioning, to realize Guan Yuguan The firm connection of small―gap suture between plate.The less pipe of pipe thickness and tube sheet in welding process, due to after pipe and tube sheet assembling There is certain interval, tube sheet is thick and tube wall is thin, tube sheet edge is also unfused and tube wall has melted during welding, therefore joint pipe End easily occurs to in-flanges, leads to not to form welding pool, reduces pipe with tube sheet gap to small dimension light-wall pipe and aperture Bridge tube plate weld is particularly important, and the preferred pipe of the present invention is less than 0.1mm with tube sheet gap so that pipe end and pore temperature in welding process Degree is consistent, while fusing, forms common welding pool to reach the purpose of welding, and it is existing to in-flanges to reduce pipe end As.
In a preferred embodiment in accordance with the present invention, in order to increase molten bath volume and ensure fusion penetration, stretched out using pipe end The assembling mode in tube sheet face, as shown in figure 1, it is 0.3~0.5mm that the end face of the pipe 2 stretches out length B in 1 face of tube sheet.
The automatic soldering technique that the present invention is provided is applied to external diameter and is less than 10mm, pipe of the pipe thickness less than 1mm, the pipe Material be SA-213 TP304L steel.
Step 3), install, debug welding equipment, be input into welding condition.
In a preferred embodiment in accordance with the present invention, the welding equipment is TIG automatic soldering devices, can be to Welder Skill parameter and process are programmed control, and with automatism voltage control (AVC) function, welding process is stable, it is possible to obtain good Appearance of weld and welding quality, preferably pulse TIG automatic soldering devices, pulsed heating, molten pool metal in welding process High-temperature residence time is short, and metal cools are fast, and arc stiffness is good, and energy is concentrated, and is conducive to adjusting welding energy and control molten bath Shape, makes circular weld uniform in shaping, and welding process is stable, is particularly suited for welding difficulty big, sensitive to welding condition Small dimension light-wall pipe and aperture bridge tube plate between joint all-position welding.
Above-mentioned welding equipment is carried out installing, debugged using front, equipment is checked, it is ensured that each connection is correct, Each function is normal, and welding gas etc. meets requirement, and equipment positioner ensures the welding gun centre of gyration and tube hub position to be welded It is consistent.
According to adapter to be welded and the specification and joint design of tube sheet, Jing is calculated repeatedly and is tested, and obtains optimized welding Technological parameter, to ensure welding quality stable reliability and appearance of weld is uniformly attractive in appearance, including:
Welding average current is 50~70A, and weld pulse frequency is 3~5Hz, and peak pulse duration is 40~60%, weldingvoltage For 9~15V, speed of welding is 100~170mm/min, and protective gas is argon and hydrogen by volume 95:The mixing of 5 mixing Gas, shield gas flow rate are 10~15L/min.
The TIG automatic soldering devices include tungsten electrode, and the specification and end shape of tungsten electrode directly affect electric current allowable, draw Arc, stabilising arc and weld penetration, molten wide, based on small dimension light-wall pipe and the particularity of aperture bridge tube plate weld, it is desirable to which weld seam has There are larger fusion penetration and less molten wide, and the structure with reference to " V " the type groove, size and said welding method parameter, choosing With specific model and the tungsten electrode of size, sidewall fusion is effectively guaranteed under the welding condition being suitable for, as shown in Fig. 2 The tungsten electrode includes tungsten electrode bar 4, tungsten electrode end circular cone 5 and the sophisticated platform 6 being arranged on the circular cone of tungsten electrode end, wherein, it is described A diameter of 1.6mm of tungsten electrode bar 4 or 2.4mm, the coning angle of tungsten electrode end circular cone 5 is 20 °~45 °, the sophisticated platform 6 A diameter of 0.2~0.5mm, the center of circle of the sophisticated platform 6 is located on the central axis of tungsten electrode end circular cone 5.
Step 4), start welding, be cleaned before welding and in welding process.
In a preferred embodiment in accordance with the present invention, welding manner be from fusion welding, will assemble and the pipe had good positioning with Tube sheet horizontal level is fixed, to pipe with tube sheet carry out circumferential weld all-position welding, every welding bead from 11 points of position starting the arc weldings of clock, Rotating welding receives arcs to overlapping 2 ° of positions with arcing point, and the welding position of every welding bead experiences overhead welding, vertical-up welding, downhand welding Change, stops to full groove is welded.
To ensure the quality of root fusion, using specific model and the tungsten electrode of size, suitable tungsten electrode position and angle are chosen Degree, so that electric arc directly acts on groove root position to be welded, the present invention preferably tungsten electrode extension elongation is 4~5mm, the point of tungsten electrode Away from 1.5~3mm of position to be welded, tungsten electrode points to the root or groove face 3 of the groove to end platform 6, and welding torch angle is -5~5 °.
In a preferred embodiment in accordance with the present invention, need strictly to be cleared up before pipe with tube sheet assembling, pipe end, tube sheet Groove and pore carry out grinding process, remove rust, oxide skin etc. so as to see metallic luster, and remove the mouth of pipe with head-grinding machine Burr, finally dips acetone using white non-woven cloth and wipes position to be welded, to non-woven fabrics invariant color, to remove moisture and greasy dirt.
It is both needed to be cleaned position to be welded or a upper welding bead before each welding bead is welded in welding process, to ensure welding Position meets welding standard, it is to avoid the final welding quality of impurity effect, preferably use white non-woven cloth dip acetone wipe it is to be welded Position or welding bead surface, to non-woven fabrics invariant color.
The said welding method that the present invention is provided combines specific pipe and tube sheet joint structure, specific welding condition Select with tungsten electrode, obtain the automatic soldering method of small dimension light-wall pipe and aperture bridge tube plate, be particularly suited for external diameter less than 10mm, Pipe thickness is less than the welding between the tube sheet of 3mm less than the pipe and pipe bridge of 1mm so that welding point good airproof performance, welding matter Amount is high, process stabilization is reliable, uniform attractive in appearance, the root fusion of appearance of weld is good, welding efficiency is high, and Jing items nondestructive testings and Physicochemical property is tested, and its result meets nuclear island primary device tube to tube sheet welding prescription.
Small dimension light-wall pipe as described above and the aperture bridge tube plate automatic soldering technique provided using the present invention carry out pipe with After Tube-sheet Welding, testing result is as follows:
Visual detection:Postwelding even weld is full, and welding bead is silvery white in color, and is visible by naked eyes defect;
Postwelding pore inner diameter measurement:Testing result is 7.5~7.7mm;
Liquid penetration test:Assay represents no liquid seepage without display;
Helium leak test is checked:Using 100% helium as search gass, all pipes must not have more than 1.0 × 10 with panel weld- 7Pa·m3The leak source of/s is present, and practice examining result is qualified;
Weld size is checked:1.839~3.109mm of weld penetration, minimum leakage passage be 0.921~1.053mm, weld seam It is 0.646~1.695mm that penetration enters root of joint value.
Embodiment
Exchanger tubes and tubesheets in nuclear island primary device are welded according to the said welding method that the present invention is provided, heat exchanger tube Specification is 9.25 × 0.889mm of Φ, and material is SA-213 TP304L steel, and tube sheet bridge length is 2.5mm, and material is SA- 182 F304L steel, it is specific as follows:
Step 1), by the machining of drilling of tube sheet side into monolateral " V " type groove, groove face and the pipe of " V " the type groove Axially bored line angulation is 40 °, and groove depth A of " V " the type groove is 1.1mm;
Step 2), exchange heat pipe is polishing to see metallic luster with tube sheet connecting portion, and dips acetone with white non-woven cloth Wipe to non-woven fabrics invariant color;Exchanger tubes and tubesheets are assembled using the assembling mode of pipe end protruded tube plate face, heat exchanger tube End face protruded tube plate face length B be 0.4mm, then Hydraulic expansion-jointing positioning, it is ensured that pipe with tube sheet gap be less than 0.1mm;
Step 3), pulse TIG automatic soldering devices are carried out installing, debug, check, it is ensured that the welding gun centre of gyration with it is to be welded Tube hub position is consistent, and is input into welding condition:Welding average current be 60A, weld pulse frequency be 4Hz, pulsewidth Than for 50%, weldingvoltage is 12V, and speed of welding is 150mm/min, and protective gas is argon and hydrogen by volume 95:5 mix The mixed gas of conjunction, shield gas flow rate are 13L/min;From the tungsten electrode of a diameter of 1.6mm, the coning angle of tungsten electrode end circular cone For 35 °, a diameter of 0.3mm of sophisticated platform;
Step 4), the exchanger tubes and tubesheets horizontal level for assembling and have good positioning is fixed, start welding, every welding bead from when 11 points of position starting the arc weldings of clock, rotating welding overlap 2 ° of positions receipts arcs to arcing point;In welding process, tungsten electrode extension elongation is 4.5mm, away from position 2.5mm to be welded, tungsten electrode points to the root of groove to the sophisticated platform of tungsten electrode, and welding torch angle is -5~5 °;Welding Acetone is dipped with white non-woven cloth before each welding bead and wipe position to be welded or upper welding bead surface, to non-woven fabrics invariant color.
Welding product carries out following inspection:
Visual detection:Postwelding even weld is full, and welding bead is silvery white in color, and is visible by naked eyes defect;
Postwelding pore inner diameter measurement:Testing result is not less than 7.6mm;
Liquid penetration test:Assay represents no liquid seepage without display;
Helium leak test is checked:Using 100% helium as search gass, all pipes must not have more than 1.0 × 10 with panel weld- 7Pa·m3The leak source of/s is present, and practice examining result is qualified;
Weld size is checked:Weld penetration meansigma methodss be 2.474mm, minimum leakage passage meansigma methodss be 0.961mm, weld seam It is 1.046mm that penetration enters root of joint meansigma methodss.
As a result show, welding product obtained in the present embodiment reaches above-mentioned touchstone, meet nuclear island primary device Guan Yuguan Plate weld prescription.
In describing the invention, it should be noted that term " on ", " interior ", the orientation of the instruction such as " outward " or position close System is, based on the orientation or position relationship under working condition of the present invention, to be for only for ease of the description present invention and simplify description, and Be not indicate or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, therefore It is not considered as limiting the invention.
The present invention is described in detail above in association with preferred implementation and exemplary example.Statement is needed but It is that these specific embodiments are only the illustrative explanations to the present invention, do not constitute any limit to protection scope of the present invention System.In the case of without departing from spirit and scope of the present invention, the technology of the present invention content and embodiments thereof can be carried out Various improvement, equivalencing or modification, these are each fallen within protection scope of the present invention.Protection scope of the present invention is with appended power Profit requires to be defined.

Claims (8)

1. small dimension light-wall pipe and aperture bridge tube plate automatic soldering technique, it is characterised in that the technique includes:
Step 1), tube sheet position to be welded is processed into into groove, the bridge length of the tube sheet is less than 3mm, the material of the tube sheet Matter is SA-182F304L steel;
Step 2), pipe to be assembled with tube sheet, and is positioned, the length (B) of the end face protruded tube plate face of the pipe is 0.3~0.5mm, The external diameter of the pipe is less than 10mm, and pipe thickness is less than 1mm, and the material of the pipe is SA-213TP304L steel;
Step 3), install, debug welding equipment, be input into welding condition,
The welding condition includes:
Welding average current be 50~70A, weld pulse frequency be 3~5Hz, peak pulse duration be 40~60%, weldingvoltage be 9~ 15V, speed of welding is 100~170mm/min, and protective gas is argon and hydrogen by volume 95:The mixed gas of 5 mixing, Shield gas flow rate is 10~15L/min;
The welding equipment includes tungsten electrode, and the tungsten electrode includes tungsten electrode bar (4), tungsten electrode end circular cone (5) and is arranged on tungsten electrode end Sophisticated platform (6) on portion's circular cone, wherein, a diameter of 1.6mm or 2.4mm of the tungsten electrode bar (4), tungsten electrode end circular cone (5) coning angle is 20 °~45 °, a diameter of 0.2~0.5mm of the sophisticated platform (6), the center of circle of the sophisticated platform (6) On the central axis of tungsten electrode end circular cone (5);
Step 4), start welding, be cleaned before welding and in welding process,
The pipe for assembling and have good positioning is fixed with tube sheet horizontal level, circumferential weld all-position welding is carried out to pipe and tube sheet, welded per bar Road overlaps 2 ° of positions receipts arcs to arcing point, stops to full groove is welded from 11 points of position starting the arc weldings of clock, rotating welding.
2. welding procedure according to claim 1, it is characterised in that step 1) in, by the machining of drilling of tube sheet side into Monolateral " V " type groove,
" V " the type groove includes groove face (3), and the groove face (3) is 30 °~45 ° with tube bore axis angulation, described The groove depth (A) of " V " type groove is 1~1.2mm.
3. welding procedure according to claim 1, it is characterised in that step 2) in, the pipe is fixed with tube sheet Hydraulic expansion-jointing Position.
4. welding procedure according to claim 1, it is characterised in that step 3) in, the welding equipment is TIG automatic weldings Connection device.
5. welding procedure according to claim 1, it is characterised in that step 4) in, keep the welding gun of the welding equipment The centre of gyration and tube hub position consistency to be welded, and/or
Welding manner is from fusion welding.
6. welding procedure according to claim 1, it is characterised in that step 4) in, the tungsten electrode extension elongation is 4~ 5mm, away from 1.5~3mm of position to be welded, tungsten electrode points to the root or groove face (3) of groove, welding torch angle to the sophisticated platform (6) of tungsten electrode Spend for -5~5 °.
7. welding procedure according to claim 1, it is characterised in that step 4) in, acetone is dipped using white non-woven cloth Position to be welded or welding bead surface are wiped, to non-woven fabrics invariant color.
8. the welding procedure according to one of claim 1 to 7, it is characterised in that detection knot after the tube to tube sheet welding Fruit is as follows:
Visual detection:Postwelding even weld is full, and welding bead is silvery white in color, and is visible by naked eyes defect;
Postwelding pore inner diameter measurement:Testing result is 7.5~7.7mm;
Liquid penetration test:No liquid seepage;
Helium leak test is checked:Pipe is with panel weld without more than 1.0 × 10-7Pa·m3The leak source of/s is present;
Weld size is checked:1.839~3.109mm of weld penetration, minimum leakage passage be 0.921~1.053mm, joint penetration It is 0.646~1.695mm into root of joint value.
CN201510524541.9A 2015-08-25 2015-08-25 Process for automatically welding small-specification thin-walled tube and small-holed axle tube plate Active CN105081538B (en)

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2548564B1 (en) * 1983-07-06 1985-11-22 Stein Industrie ASSEMBLY FORMED BY ASSEMBLING FERRITIC STAINLESS STEEL TUBES ON A TUBULAR PLATE IN CARBON STEEL, AND METHOD FOR MANUFACTURING SAID ASSEMBLY
US4606491A (en) * 1984-11-07 1986-08-19 Bbc Brown, Boveri & Company, Limited Process for sealing a leak in a rolled tube/tubeplate joint
CN101670478B (en) * 2009-10-23 2011-11-02 东方电气集团东方锅炉股份有限公司 Sealing welding technique of low-alloy steel pipe plate and stainless steel pipe of low-pressure heat exchanger
CN103817415B (en) * 2014-02-26 2015-11-25 睿能(沈阳)热泵技术有限公司 A kind of welding method of titanium ultra-thin tube
CN204449678U (en) * 2014-12-16 2015-07-08 北京航天新风机械设备有限责任公司 A kind of tube sheet grafting welding point

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