CN105081538A - 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
CN105081538A
CN105081538A CN201510524541.9A CN201510524541A CN105081538A CN 105081538 A CN105081538 A CN 105081538A CN 201510524541 A CN201510524541 A CN 201510524541A CN 105081538 A CN105081538 A CN 105081538A
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China
Prior art keywords
welding
tube
tungsten electrode
groove
pipe
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CN201510524541.9A
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CN105081538B (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, be specifically related to a kind of small dimension light-wall pipe and aperture bridge tube plate automatic soldering technique.
Background technology
Tube to tube sheet welding is widely used in the manufacturing of the devices such as heat exchanger, the main cause that leakage is heat exchanger cisco unity malfunction is there is in tube hydroforming joint in running, for the exchanger tubes and tubesheets of different size, material, for reaching good welding quality and meeting product requirement, specific weld technique with matching need be adopted.
So far, welding between small dimension light-wall pipe with aperture bridge tube plate still has great difficulty, especially external diameter is less than 10mm, the tube and tube bridge that pipe thickness is less than 1mm is less than the welding between the tube sheet of 3mm, also there is no comparatively ripe technology at present, especially automatic welding technique, this is mainly because one side small dimension light-wall pipe welding parameters is comparatively responsive, welding parameter debugging and welding operation difficulty larger, in welding, very easily weldering is leaked or is produced pipe end varus, the defects such as weld seam is uneven, on the other hand when bridge spacing is less, very easily occur that weld seam overlaps, welding quality is wayward.
The products such as nuclear island primary device steam generator, residual heat removal exchanger are all designed with exchanger tubes and tubesheets welding, mostly be small dimension light-wall pipe, pipe bridge spacing is little, and heat exchanger tube quantity is many, low and the difficult quality guarantee of human weld's efficiency, and nuclear island primary device is high to tube to tube sheet welding quality requirement, common process is difficult to reach standard, therefore, the automatic soldering technique that exploitation adapts with it is needed badly.
Due to the existence of the problems referred to above in prior art, the present inventor studies existing tube to tube sheet welding technology, so that it is even to work out appearance of weld, and a kind of small dimension light-wall pipe that welding process is efficient, stable and aperture bridge tube plate automatic soldering technique.
Summary of the invention
In order to overcome the problems referred to above, present inventor has performed and study with keen determination, design and be applicable to external diameter and be less than 10mm, the tube and tube bridge that pipe thickness is less than 1mm is less than the automatic soldering technique between the tube sheet of 3mm, guarantee welding process is stablized, appearance of weld is evenly attractive in appearance, and can obtain the welding quality meeting nuclear island product requirement.
The object of the present invention is to provide small dimension light-wall pipe and aperture bridge tube plate automatic soldering technique, this technique comprises:
Step 1), groove is processed at position to be welded for tube sheet;
Step 2), tube hydroforming is assembled, and locates;
Step 3), install, debug welding equipment, input welding condition;
Step 4), start welding, clean before welding and in welding process.
The beneficial effect that the present invention has comprises:
(1) small dimension light-wall pipe provided by the invention and aperture bridge tube plate automatic soldering technique adopt specific tube hydroforming joint design to assemble, and provide suitable molten bath volume and melting pool shape, ensure fusion penetration and penetration well simultaneously, improve welding quality;
(2) small dimension light-wall pipe provided by the invention and aperture bridge tube plate automatic soldering technique adopt pulse TIG automatic soldering device, are conducive to adjustment welding energy and control melting pool shape, making circular weld uniform in shaping, and welding process is efficient, stable;
(3) tungsten electrode of the specific model that adopts of small dimension light-wall pipe provided by the invention and aperture bridge tube plate automatic soldering technique and size, and choose suitable tungsten electrode position and angle, make weld seam have larger fusion penetration and less molten wide, under the welding condition be suitable for, effectively ensure that sidewall fusion;
(4) small dimension light-wall pipe provided by the invention is selected in conjunction with specific tube hydroforming joint design, specific welding condition and tungsten electrode with aperture bridge tube plate automatic soldering technique, be applicable to external diameter and be less than 10mm, the tube and tube bridge that pipe thickness is less than 1mm is less than the welding between the tube sheet of 3mm, make that welding point good airproof performance, welding quality are high, process stabilization is reliable, appearance of weld evenly attractive in appearance, root fusion is good, welding efficiency is high, and through every nondestructive testing and physicochemical property test, its result meets nuclear island primary device tube to tube sheet welding quality requirement.
Accompanying drawing explanation
Fig. 1 illustrates the structural representation of the tube hydroforming joint according to a kind of preferred embodiment of the present invention;
Fig. 2 illustrates the structural representation of the tungsten electrode according to a kind of preferred embodiment of the present invention.
Drawing reference numeral illustrates:
1-tube sheet
2-manages
3-groove face
A-groove depth
The end face of B-pipe stretches out the length in tube sheet face
4-tungsten electrode bar
5-tungsten electrode end-cone
The most advanced and sophisticated platform of 6-
Detailed description of the invention
Below by drawings and Examples, the present invention is described in more detail.Illustrated by these, the features and advantages of the invention will become more explicit.
According to the present invention, provide small dimension light-wall pipe and aperture bridge tube plate automatic soldering technique, this technique comprises the following steps:
Step 1), groove is processed at position to be welded for tube sheet.
In a preferred embodiment in accordance with the present invention, as shown in Figure 1, the machining of drilling of tube sheet 1 side is become monolateral " V " type groove, described " V " type groove comprises groove face 3, described groove face 3 is 30 ° ~ 45 ° with tube bore axis angulation, the groove depth A of described " V " type groove is 1 ~ 1.2mm, above-mentioned " V " type groove is coordinate the light-wall pipe of specific weld technique provided by the invention and specific standard and aperture bridge tube plate to arrange, suitable molten bath volume and melting pool shape are provided, simultaneously ensure fusion penetration and penetration good, welding point place is made to form complete molten bath and excessive inside contracting does not appear in the mouth of pipe.
Automatic soldering technique provided by the invention is applicable to the tube sheet that bridge length is less than 3mm, and the material of described tube sheet is SA-182F304L steel.
Step 2), tube hydroforming is assembled, and locates.
In a preferred embodiment in accordance with the present invention, tube hydroforming is carried out Hydraulic expansion-jointing location, firmly connect with the small―gap suture realized between tube hydroforming.The less tube hydroforming of pipe thickness is in welding process, owing to there is certain interval after tube hydroforming assembling, tube sheet is thick and tube wall is thin, during welding, tube sheet edge does not also melt and tube wall has melted, therefore joint pipe end very easily occurs to in-flanges, cause forming welding pool, reduce tube hydroforming gap to small dimension light-wall pipe and aperture bridge Tube-sheet Welding particularly important, the preferred tube hydroforming gap of the present invention is less than 0.1mm, pipe end and pore temperature in welding process are consistent, melt simultaneously, form common welding pool to reach the object of welding, and reduce pipe end to in-flanges phenomenon.
In a preferred embodiment in accordance with the present invention, in order to increase molten bath volume and ensure fusion penetration, adopt pipe end to stretch out the assembling mode in tube sheet face, as shown in Figure 1, the length B that the end face of described pipe 2 stretches out tube sheet 1 is 0.3 ~ 0.5mm.
Automatic soldering technique provided by the invention is applicable to external diameter and is less than 10mm, and pipe thickness is less than the pipe of 1mm, and the material of described pipe is SA-213TP304L steel.
Step 3), install, debug welding equipment, input welding condition.
In a preferred embodiment in accordance with the present invention, described welding equipment is TIG automatic soldering device, programming Control can be carried out to welding condition and process, there is automatism voltage control (AVC) function, welding process is stablized, good appearance of weld and welding quality can be obtained, be preferably pulse TIG automatic soldering device, pulsed heating in welding process, molten pool metal high-temperature residence time is short, metal cooling is fast, and arc stiffness is good, concentration of energy, be conducive to adjustment welding energy and control melting pool shape, make circular weld uniform in shaping, welding process is stablized, be particularly useful for welding difficulty large, to the all-position welding of joint between the small dimension light-wall pipe of welding condition sensitivity and aperture bridge tube plate.
Install above-mentioned welding equipment, debug before using, check equipment, ensure that correct, each function of each connection is normal, welding gas etc. meets the demands, and equipment positioner ensures that the welding gun centre of gyration and tube hub position to be welded are consistent.
According to specification and the joint design of tube hydroforming to be welded, through repeatedly calculating and testing, obtain optimized welding condition, to ensure that welding quality stable is reliable and appearance of weld is evenly attractive in appearance, comprising:
Welding average current is 50 ~ 70A, and weld pulse frequency is 3 ~ 5Hz, and peak pulse duration is 40 ~ 60%; weldingvoltage is 9 ~ 15V; speed of welding is 100 ~ 170mm/min, and protective gas is argon gas and the hydrogen mist that mixes of 95:5 by volume, and shield gas flow rate is 10 ~ 15L/min.
Described TIG automatic soldering device comprises tungsten electrode, the specification of tungsten electrode and end shape directly affect electric current allowable, striking, stabilising arc and weld penetration, molten wide, based on the particularity of small dimension light-wall pipe and aperture bridge Tube-sheet Welding, require that weld seam has larger fusion penetration and less molten wide, and combine the structure of described " V " type groove, size and said welding method parameter, select the tungsten electrode of specific model and size, effectively sidewall fusion is ensure that under the welding condition be suitable for, as shown in Figure 2, described tungsten electrode comprises tungsten electrode bar 4, tungsten electrode end-cone 5 and the most advanced and sophisticated platform 6 be arranged in tungsten electrode end-cone, wherein, the diameter of described tungsten electrode bar 4 is 1.6mm or 2.4mm, the coning angle of described tungsten electrode end-cone 5 is 20 ° ~ 45 °, the diameter of described most advanced and sophisticated platform 6 is 0.2 ~ 0.5mm, the center of circle of described most advanced and sophisticated platform 6 is positioned on the central axis of described tungsten electrode end-cone 5.
Step 4), start welding, clean before welding and in welding process.
In a preferred embodiment in accordance with the present invention, welding manner is from fusion welding, to assemble and the tube hydroforming horizontal level of having good positioning is fixed, circumferential weld all-position welding is carried out to tube hydroforming, every bar welding bead is from clock 11 position starting the arc weldings, rotating welding receives arc to overlapping 2 ° of positions with arcing point, and the welding position of every bar welding bead all experiences the change of overhead welding, vertical-up welding, downhand welding, stops to the full groove of weldering.
For ensureing the quality of root fusion, adopt the tungsten electrode of specific model and size, choose suitable tungsten electrode position and angle, groove root position to be welded is directly acted on to make electric arc, the preferred tungsten electrode extension elongation of the present invention is 4 ~ 5mm, the most advanced and sophisticated platform 6 of tungsten electrode is apart from position 1.5 ~ 3mm to be welded, and tungsten electrode points to root or the groove face 3 of described groove, and welding torch angle is-5 ~ 5 °.
In a preferred embodiment in accordance with the present invention, need strictly to clear up before tube hydroforming assembling, pipe end, tube sheet groove and pore carry out grinding process, removing iron rust, oxide skin etc., make it see metallic luster, and remove the burr of the mouth of pipe with head-grinding machine, finally use white non-woven cloth to dip acetone wiping position to be welded, to non-woven fabrics nondiscolouring, to remove moisture and greasy dirt.
All need weld each welding bead in welding process before to position to be welded or on a welding bead clean, to ensure that welding position meets welding standard, avoid the final welding quality of impurity effect, preferably use white non-woven cloth to dip acetone wiping position to be welded or welding bead surface, to non-woven fabrics nondiscolouring.
Said welding method provided by the invention is in conjunction with specific tube hydroforming joint design, specific welding condition and tungsten electrode are selected, obtain the automatic soldering method of small dimension light-wall pipe and aperture bridge tube plate, be particularly useful for external diameter and be less than 10mm, the tube and tube bridge that pipe thickness is less than 1mm is less than the welding between the tube sheet of 3mm, make welding point good airproof performance, welding quality is high, process stabilization is reliable, appearance of weld is evenly attractive in appearance, root fusion is good, welding efficiency is high, and through every nondestructive testing and physicochemical property test, its result meets nuclear island primary device tube to tube sheet welding quality requirement.
After adopting small dimension light-wall pipe described above provided by the invention and aperture bridge tube plate automatic soldering technique to carry out tube to tube sheet welding, testing result is as follows:
Visual detection: postwelding even weld is full, and welding bead is silvery white in color, without naked eyes visual defects;
Postwelding pore inner diameter measurement: testing result is 7.5 ~ 7.7mm;
Liquid penetration test: assay, without display, represents no liquid seepage;
Helium leak test is checked: using 100% helium as search gas, all tube hydroforming weld seams must not have more than 1.0 × 10 -7pam 3the leak source of/s exists, and practice examining result is qualified;
Weld size is checked: weld penetration 1.839 ~ 3.109mm, minimum leakage passage is 0.921 ~ 1.053mm, and it is 0.646 ~ 1.695mm that joint penetration enters root of joint value.
Embodiment
According to said welding method provided by the invention, exchanger tubes and tubesheets in nuclear island primary device is welded, heat exchanger tube specification is Φ 9.25 × 0.889mm, and material is SA-213TP304L steel, and tube sheet bridge length is 2.5mm, material is SA-182F304L steel, specific as follows:
Step 1), the machining of drilling of tube sheet side is become monolateral " V " type groove, groove face and the tube bore axis angulation of described " V " type groove are 40 °, and the groove depth A of described " V " type groove is 1.1mm;
Step 2), the polishing of heat exchanging tube hydroforming connecting portion to seeing metallic luster, and dips acetone wiping to non-woven fabrics nondiscolouring with white non-woven cloth; Exchanger tubes and tubesheets assembles by the assembling mode adopting pipe end to stretch out tube sheet face, and the length B that the end face of heat exchanger tube stretches out tube sheet face is 0.4mm, and then Hydraulic expansion-jointing location, ensures that tube hydroforming gap is less than 0.1mm;
Step 3), paired pulses TIG automatic soldering device carries out installing, debugs, checks, ensure that the welding gun centre of gyration and tube hub position to be welded are consistent, input welding condition: welding average current is 60A, and weld pulse frequency is 4Hz, and peak pulse duration is 50%, weldingvoltage is 12V, speed of welding is 150mm/min, and protective gas is argon gas and the hydrogen mist that mixes of 95:5 by volume, and shield gas flow rate is 13L/min; Select diameter to be the tungsten electrode of 1.6mm, the coning angle of tungsten electrode end-cone is 35 °, and the diameter of most advanced and sophisticated platform is 0.3mm;
Step 4), will to assemble and the exchanger tubes and tubesheets horizontal level of having good positioning is fixed, start welding, every bar welding bead is from clock 11 position starting the arc weldings, and rotating welding receives arc to overlapping 2 ° of positions with arcing point; In welding process, tungsten electrode extension elongation is 4.5mm, and the most advanced and sophisticated platform of tungsten electrode is apart from position 2.5mm to be welded, and tungsten electrode points to the root of groove, and welding torch angle is-5 ~ 5 °; All acetone wiping position to be welded or a upper welding bead surface is dipped, to non-woven fabrics nondiscolouring with white non-woven cloth before welding each welding bead.
Welding product carries out following inspection:
Visual detection: postwelding even weld is full, and welding bead is silvery white in color, without naked eyes visual defects;
Postwelding pore inner diameter measurement: testing result is for being not less than 7.6mm;
Liquid penetration test: assay, without display, represents no liquid seepage;
Helium leak test is checked: using 100% helium as search gas, all tube hydroforming weld seams must not have more than 1.0 × 10 -7pam 3the leak source of/s exists, and practice examining result is qualified;
Weld size is checked: weld penetration mean value is 2.474mm, and minimum leakage passage mean value is 0.961mm, and it is 1.046mm that joint penetration enters root of joint mean value.
Result shows, and the welding product that the present embodiment obtains reaches above-mentioned test stone, meets nuclear island primary device tube to tube sheet welding quality requirement.
In describing the invention, it should be noted that, term " on ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on the orientation under duty of the present invention or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
More than in conjunction with preferred embodiment and exemplary example to invention has been detailed description.But it is to be understood that, these detailed description of the invention are only to illustrative explanations of the present invention, do not form any restriction to protection scope of the present invention.When not exceeding the present invention's spirit and protection domain, can carry out various improvement, equivalencing or modification to the technology of the present invention content and embodiment thereof, these all fall within the scope of protection of the present invention.Protection scope of the present invention is as the criterion with claims.

Claims (10)

1. small dimension light-wall pipe and aperture bridge tube plate automatic soldering technique, it is characterized in that, this technique comprises:
Step 1), groove is processed at position to be welded for tube sheet;
Step 2), tube hydroforming is assembled, and locates;
Step 3), install, debug welding equipment, input welding condition;
Step 4), start welding, clean before welding and in welding process.
2. welding procedure according to claim 1, is characterized in that, step 1) in, the machining of drilling of tube sheet side is become monolateral " V " type groove, and/or
Described " V " type groove comprises groove face (3), and described groove face (3) and tube bore axis angulation are 30 ° ~ 45 °, and the groove depth (A) of described " V " type groove is 1 ~ 1.2mm, and/or
The bridge length of described tube sheet is less than 3mm, and the material of described tube sheet is SA-182F304L steel.
3. welding procedure according to claim 1, is characterized in that, step 2) in, the length (B) that the end face of described pipe stretches out tube sheet face is 0.3 ~ 0.5mm, and/or
The external diameter of described pipe is less than 10mm, and pipe thickness is less than 1mm, and the material of described pipe is SA-213TP304L steel, and/or
Described tube hydroforming Hydraulic expansion-jointing location.
4. welding procedure according to claim 1, is characterized in that, step 3) in, described welding equipment is TIG automatic soldering device.
5. welding procedure according to claim 1, is characterized in that, step 3) in, described welding condition comprises:
Welding average current is 50 ~ 70A, and weld pulse frequency is 3 ~ 5Hz, and peak pulse duration is 40 ~ 60%; weldingvoltage is 9 ~ 15V; speed of welding is 100 ~ 170mm/min, and protective gas is argon gas and the hydrogen mist that mixes of 95:5 by volume, and shield gas flow rate is 10 ~ 15L/min.
6. welding procedure according to claim 1, it is characterized in that, step 3) in, described welding equipment comprises tungsten electrode, described tungsten electrode comprises tungsten electrode bar (4), tungsten electrode end-cone (5) and the most advanced and sophisticated platform (6) be arranged in tungsten electrode end-cone, wherein, the diameter of described tungsten electrode bar (4) is 1.6mm or 2.4mm, the coning angle of described tungsten electrode end-cone (5) is 20 ° ~ 45 °, the diameter of described most advanced and sophisticated platform (6) is 0.2 ~ 0.5mm, the center of circle of described most advanced and sophisticated platform (6) is positioned on the central axis of described tungsten electrode end-cone (5).
7. welding procedure according to claim 4, is characterized in that, step 4) in, keep the welding gun centre of gyration of described welding equipment and tube hub position consistency to be welded, and/or
Welding manner is from fusion welding, and/or
To assemble and the tube hydroforming horizontal level of having good positioning is fixed, carry out circumferential weld all-position welding to tube hydroforming, every bar welding bead is from clock 11 position starting the arc weldings, and rotating welding receives arc to overlapping 2 ° of positions with arcing point, to the full groove stopping of weldering.
8. welding procedure according to claim 6, it is characterized in that, step 4) in, described tungsten electrode extension elongation is 4 ~ 5mm, the most advanced and sophisticated platform (6) of tungsten electrode is apart from position 1.5 ~ 3mm to be welded, tungsten electrode points to root or the groove face (3) of groove, and welding torch angle is-5 ~ 5 °.
9. welding procedure according to claim 1, is characterized in that, step 4) in, use white non-woven cloth to dip acetone wiping position to be welded or welding bead surface, to non-woven fabrics nondiscolouring.
10. according to the welding procedure one of claim 1 to 9 Suo Shu, it is characterized in that, after described tube to tube sheet welding, testing result is as follows:
Visual detection: postwelding even weld is full, and welding bead is silvery white in color, without naked eyes visual defects;
Postwelding pore inner diameter measurement: testing result is 7.5 ~ 7.7mm;
Liquid penetration test: no liquid seepage;
Helium leak test is checked: tube hydroforming weld seam is without more than 1.0 × 10 -7pam 3the leak source of/s exists;
Weld size is checked: weld penetration 1.839 ~ 3.109mm, minimum leakage passage is 0.921 ~ 1.053mm, and it is 0.646 ~ 1.695mm that joint penetration enters 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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CN105880815A (en) * 2016-06-15 2016-08-24 通号轨道车辆有限公司 Tube plate angle joint aided welding device and welding method
CN106944723A (en) * 2017-05-05 2017-07-14 哈电集团(秦皇岛)重型装备有限公司 A kind of low-alloy steel heat exchanger tube docking automatic soldering technique for filling melting ring
CN106975826A (en) * 2017-05-05 2017-07-25 哈电集团(秦皇岛)重型装备有限公司 A kind of nickel-base alloy heat exchanger tube docks automatic soldering technique
CN107052517A (en) * 2017-05-05 2017-08-18 哈电集团(秦皇岛)重型装备有限公司 A kind of low-alloy steel docks automatic soldering technique with nickel-base alloy dissimilar steel heat exchange tube
CN107052536A (en) * 2017-05-05 2017-08-18 哈电集团(秦皇岛)重型装备有限公司 A kind of low-alloy steel heat exchanger tube docking automatic soldering technique without packing material
CN108480941A (en) * 2018-06-06 2018-09-04 武汉市润之达石化设备有限公司 The manufacturing process of fin tube type air cooler and its fin tube type air cooler of manufacture
CN109500507A (en) * 2018-11-07 2019-03-22 江山顺泰化工机械工程有限公司 A kind of connection method of heat exchanger tube sheet and heat exchanger tube
CN110238489A (en) * 2019-06-13 2019-09-17 鲁西工业装备有限公司 A kind of production of high-temperature heat-exchanging and welding procedure
CN111069775A (en) * 2019-12-31 2020-04-28 哈电集团(秦皇岛)重型装备有限公司 Connecting system and method for heat exchange tube and tube plate

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CN105880815A (en) * 2016-06-15 2016-08-24 通号轨道车辆有限公司 Tube plate angle joint aided welding device and welding method
CN106944723A (en) * 2017-05-05 2017-07-14 哈电集团(秦皇岛)重型装备有限公司 A kind of low-alloy steel heat exchanger tube docking automatic soldering technique for filling melting ring
CN106975826A (en) * 2017-05-05 2017-07-25 哈电集团(秦皇岛)重型装备有限公司 A kind of nickel-base alloy heat exchanger tube docks automatic soldering technique
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CN107052536A (en) * 2017-05-05 2017-08-18 哈电集团(秦皇岛)重型装备有限公司 A kind of low-alloy steel heat exchanger tube docking automatic soldering technique without packing material
CN107052536B (en) * 2017-05-05 2020-02-07 哈电集团(秦皇岛)重型装备有限公司 Automatic butt welding process for low alloy steel heat exchange tubes without filler
CN108480941A (en) * 2018-06-06 2018-09-04 武汉市润之达石化设备有限公司 The manufacturing process of fin tube type air cooler and its fin tube type air cooler of manufacture
CN108480941B (en) * 2018-06-06 2019-06-28 武汉市润之达石化设备有限公司 The manufacturing process of fin tube type air cooler and its fin tube type air cooler of manufacture
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CN110238489A (en) * 2019-06-13 2019-09-17 鲁西工业装备有限公司 A kind of production of high-temperature heat-exchanging and welding procedure
CN110238489B (en) * 2019-06-13 2021-07-30 鲁西工业装备有限公司 Manufacturing and welding process of high-temperature heat exchanger
CN111069775A (en) * 2019-12-31 2020-04-28 哈电集团(秦皇岛)重型装备有限公司 Connecting system and method for heat exchange tube and tube plate

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