CN101318245A - Tube fin brazing process and internal tube heating soldering machine for - Google Patents
Tube fin brazing process and internal tube heating soldering machine for Download PDFInfo
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- CN101318245A CN101318245A CNA2008100455001A CN200810045500A CN101318245A CN 101318245 A CN101318245 A CN 101318245A CN A2008100455001 A CNA2008100455001 A CN A2008100455001A CN 200810045500 A CN200810045500 A CN 200810045500A CN 101318245 A CN101318245 A CN 101318245A
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Abstract
The invention discloses a tube fin brazing process and an in-tube heating brazing machine and is characterized in that a finned tubular pipe welding element well filled with solders is placed on a bracket and the surfaces of welding elements to be brazed are chemically cleaned; a rod type electric heating tube extends into the pipe to perform in-tube radiation heating to firstly moisten and apply the solders at the external wall of the pipe to fill the brazing gaps and then transfer the temperature to a finned folding edge by liquid solders; the metallurgical bonding is formed between the solders and the pipe as well as the folding edge by the atomic diffusion and solution. By adopting the in-tube heating brazing machine which consists of a machine stand, the bracket which is arranged at the front end of the machine stand and a heating tube holder arranged at the bracket, the tube fin brazing process and the in-tube heating brazing machine have the advantages of simple and convenient operation, minimal investment, no limitation to the geometric shapes of the brazed elements, no damage to the surfaces of the brazed elements and no change of the crystal structures in metals and solve the problems that the fins reach the brazing temperature before the pipes and the temperature is not easily controlled, and the brazing can not completely penetrate and fill the connection gaps and the brazing effect is bad, and the problems are caused by the traditional brazing heating ways.
Description
Technical field
The present invention relates to a kind of tube fin brazing process and internal tube heating soldering machine, tube fin brazing process and internal tube heating soldering machine that type of the present invention relates in describing, be to be the process for soldering of main object with the pipe fin that is used to fin shape tubing heat exchanger, but can think tube fin brazing process and the internal tube heating soldering machine that type of the present invention relates in describing, can also be applicable to the soldering that other structure is passed one group of laminar fin simultaneously for one or more pipe at least, such as being used for refrigeration, HVAC, compressor, automobile, the fin heat exchanger of industries such as oil cooling.
Background technology
In the prior art, band fin shape tubing heat exchanger, owing to be provided with fin that a plurality of minim gaps of being separated by are arranged parallel to each other and a plurality ofly vertically run through these fins and be the fixing pipes of the many rows of multiple row, these many pipes pass the secure fit that cooperates normally interference (or gap) between one group of laminar fin and the pipe simultaneously, and fin is all finished by welding with fixedlying connected of pipe is general.By many conduits and some the finned heat exchangers that fin is formed, material mostly is industrial pure copper, about more than 300 millimeters of pipe range, 1.0 millimeters of wall thickness; Thick 0.4 millimeter of fin, every fin dashes at grade ducts, and the hole that have flanging identical with the conduit number, and the top in flange hole is also towards the notch of laying solder is arranged.Thickness is little, that effective length is long, the space is little fin; weld together by flanging and conduit; even if used up the vacuum brazing, the weldering of nitrogen protection slice that have in contact reaction brazing and the diffusion brazing; the weldering of hydrogen shield slice; gas brazing, induction brazing, furnace brazing, salt bath brazing and vacuum brazing; and conventional method such as oxy-acetylene soldering, can not solve all the time and guarantee fin and good this technology difficult problem of heat exchange efficiency of the conduit face of weld.Guarantee the good welds of fin and conduit solder side, at first which type of thermal source is the problem that will solve be to use.If the use combustion gas may cause conduit two ends temperature inconsistent inhomogeneous, the welding quality effect is difficult to guarantee.If carry out repair welding again, mass effect is poorer probably.Guarantee each section of conduit unanimity of heating, a soldering successfully is the best measure of ensuring the quality of products.The method of electric arc heated also is not optional.If utilize the conduit self-resistance to pass to the low-voltage, high-current heating, this technical scheme should be feasible, but the equipment and technology more complicated, investment is big, and the enforcement of this scheme will be the comparison difficulty, and the cycle is also with long.If the gas brazing of welding as thermal source with the flame of fuel gas and oxygen or compressed air mixed combustion, though can be according to the workpiece shape, utilize solder and mother metal reaction solution to fill fin and pipe joint gap mutually, add thermal weld fin and conduit simultaneously with many flames, but the uppity cause of inhomogeneous and temperature of the flame heat of this contact reaction brazing, postwelding is checked, some flanging and conduit are not burn-on, and some local solder flows to the outside and but formed welding between two fins.With the diffusion brazing that seems homogeneous heating, such as furnace brazing, in welding process, the workpiece that assembles solder is placed on adds thermal weld in the stove, be incubated diffusion time though can increase, make weld seam and full and uniformization of mother metal, be nested in the red copper radiating fin on the copper tube, because after conduit and the fin assembling, conduit is wrapped up by flanging fully.When use had the traditional heating method of contact reaction brazing and diffusion brazing, at first heated was fin, and conduit but can not directly heat; The thickness of conduit is 2.5 times of fin in addition, and thermal capacity is big, and temperature rises slow.During soldering, the rising temperature of conduit always lags behind the rising temperature of fin, and fin arrives brazing temperature prior to conduit.When fin arrived brazing temperature, the solder of fusing at first flowed to fin on one side, and flow on the fin through the gap of flanging; This moment, solder began fusing and wetting and attached to the flanging inwall, and because conduit no show brazing temperature still, liquid solder can not be wetting and attached on the conduit, can not infiltrate and fill up the joint clearance of brazing, junction, formed the solder of " unnecessary ", flow to the flanging outer wall along the gap of flanging.And when conduit arrives the solder fusing point of brazing temperature, the fin temperature is more high than brazing temperature, fin begins to soften, time, Great Wall Softwareization was serious more more, the solder of soldering seam remains little, and can not satisfy the requirement of loading of the joint clearance of brazing of flanging and conduit, causes flanging and conduit can not reach good soldering effect, its effect and flame brazing method are more or less the same, and welding all gets nowhere.
Summary of the invention
The present invention makes in order to address the above problem, its purpose is to provide in a kind of conduit or the process and the internal tube heating soldering machine of heating soldering pipe fin in the similar chamber, cause fin to arrive brazing temperature to solve traditional soldering mode of heating prior to conduit, temperature is wayward, soldering can not be infiltrated fully and be filled up the gap, junction, the problem of soldering weak effect.
To achieve these goals, a kind of tube fin brazing process provided by the invention, have following feature: is that low filling brazing solder is loaded the gap, junction with fusing point than weldment, the band fin shape tubular type conduit weldment that assembles solder is placed on the carriage, and Chemical cleaning is carried out on weldment to be brazed surface; Shaft-like electric heating tube stretched in conduit, manage interior radiation heating, make the at first wetting and deposited full conduit outer wall of solder and be full of the joint clearance of brazing, communicate the temperature on the fin flanging by liquid solder again, after reaching brazing temperature, diffusion and dissolving by atom between solder and conduit and the flanging form metallurgical binding afterwards; Pause the cooled and solidified liquid solder then.
The present invention has following beneficial effect than prior art.
The present invention adopts the mode that heats in conduit, allow conduit arrive brazing temperature prior to fin, conduit arrives brazing temperature earlier makes the at first wetting and deposited full conduit outer wall of solder be full of the joint clearance of brazing, communicate the temperature on the fin flanging by liquid solder, form the brazing mode of metallurgical binding after diffusion by atom and the dissolving, not only be that road has been paved in this critical component of finned heat exchanger and even the trial-production and the production of producing central hot water machine in batches, sufficient technical conditions have been created, and created and be different from traditional method for welding, easy to operation, invest small, the method for welding of heating in the novel pipe.And the welded part geometry is unrestricted, and the surface can not damaged, and the metal inside crystal structure is constant, and the soldering distortion is little, does not have obvious crator, and the joint smooth and beautiful appearance makes the finned heat exchanger of producing soldering in batches, can compare favourably with Italian import exemplar fully.Cause fin to arrive brazing temperature prior to conduit thereby solved traditional soldering mode of heating, temperature is wayward, and soldering can not be infiltrated fully and be filled up the gap, junction, the problem of soldering weak effect.
Up to the present, not seeing the precedent such as the method for welding of (die cavity) heating in heating or the chamber in the pipe of other diameters, other cross sectional shapes that is similar to this method as yet reports.
The electric heating tubular type internal tube heating soldering machine of creatively making according to the present invention, engage firmly, has toughness, stress distribution is fabulous, internal tube heating soldering machine it have compact conformation, heat conduction efficiency height, light and handy and firmly, strong, the good economy performance of adaptability, rational in infrastructure, advantages such as volume is little, easy to install, safe, corrosion-resistant, long service life.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the welding schematic diagram of the brazing fin formula heat exchanger fin according to the present invention.
Fig. 2 is the partial side view of Fig. 1.
Fig. 3 is the user mode front view of electric heating tubular type internal tube heating soldering machine of the present invention and brazing fin formula heat exchanger fin.
Fig. 4 is the vertical view of Fig. 3.
1. conduits among the figure, 2. fin, 3. electric heating tube, 4. heating tube support, 5. power supply terminal, the 6. fuselage cradle of solderer, 7. heat exchanger pallet, 8. fin flanging, 9. solder, 10. solder joint, 11. notches, 12. fixation clips, 13. carriages, 14. terminal plates.
The specific embodiment
Consult Fig. 1～Fig. 2.Band fin shape tubing heat exchanger is made up of many conduits 1 and some fins 2.Fin 2 is arranged parallel to each other, and is run through connecting by at least two vertical conduits 1.Every fin 2 dashes the fin that ducts 1 is arranged at grade and turns down lateral opening.And the top in flange hole also dashes the notch 11 of laying solder.Single electric heating tube 3 passes in the conduit 1 die cavity pipe.Must carry out careful processing and strict the cleaning to conduit 1 workpiece that is equipped with fin 2 before the soldering, remove degreasing and blocked up oxide-film, guarantee fin flanging 8 interface fit-up gaps.The gap generally requires between 0.01～0.1 millimeter.Is the notch 11 that low filling brazing solder is filled into the gap, junction with fusing point than weldment, the band fin shape tubular type conduit weldment that assembles solder 9 is placed on the pallet shown in Figure 37, shaft-like electric heating tube 3 is stretched in conduit 1, manage interior radiation heating then.In the welding process, adopt than the low-melting metal material of pipe fin mother metal and make solder, pipe fin weldment and solder are heated to above the solder fusing point, are lower than the temperature of managing fin mother metal fusing point.Use the HL602 solder to carry out test weld through test.Brazing temperature selects to be lower than the temperature of weldment material melting point, is chosen between 270～310 ℃.Solder flux uses 25% zinc chloride.Holding time was controlled at 5～8 minutes approximately.Utilize liquid solder wet tube fin mother metal, fill flanging play movement solder joint, make solder 9 at first be melted into liquid wetting and deposited full conduit outer wall solder joint 10, and be full of the joint clearance of brazing.Brazing alloy in the solder joint 10 becomes liquid solder under the melt temperature of electric heating tube 3.Liquid solder communicates the temperature on the fin flanging 8.After reaching brazing temperature, diffusion and dissolving by atom between solder 9 and conduit and the flanging form metallurgical binding afterwards; Stop heating this moment, pauses cooling, and liquid solder solidifies, and brazing process finishes.Also this moment, fin 2 main bodys also are lower than brazing temperature; Even brazing temperature is a little more than the softening temperature of fin mother metal red copper, but because of short deficiency still of time so that fin is softening fully.Postwelding on inspection, the vestige of solder all can be seen in the slit between fin, and relatively evenly, proves that the joint clearance of brazing all fills up, and has guaranteed enough soldering areas; All formed complete solder circle root between first and tailpiece fin and the conduit.
Consult Fig. 3, Fig. 4, the internal tube heating soldering machine of making according to said method, by the fuselage cradle among the figure 6 be contained in the carriage 13 of fuselage cradle 6 front ends, and the heating tube support 4 that is installed in carriage 13 is formed.Each heating tube support 4 is electrically connected electric heating tube 3 by the power patch panel on the carriage 13 14.Each electric heating tube 3 corresponding power supply terminal 5.Between power patch panel 14 and power supply, can be furnished with one to heating current with regulate the controller of control heat time heating time, to form a complete separate unit heat exchanger solderer.Carriage 13 connects firmly on fuselage cradle 6, and carriage 13 and electric heating tube support 4 are fixedly connected, and the fixation clip 12 that is connected and fixed with screw is housed on the pipe holder 4.The front end of carriage 13 is equipped with the terminal plate 14 that connects power supply, is parallel with the binding post 5 that corresponding electric heating tube 3 is arranged on it.Each binding post 5 is electrically connected with the electric heating tube 3 of electric heating tube support 4.Some the electric heating tubes that are arranged in parallel 3 are fixed on the electric heating tube support 4.The lead-out wire of many electric heating tubes 3 is directly connected in power switch by binding post 5, the fuselage cradle 6 of electric heating tube support 4 and solderer be weldering for one, not removable when welding.During welding, pallet 7 is placed on fuselage cradle 6 platforms, and the heat exchanger that assembling finishes places pallet 7, and conduit 1 aligns electric heating tube 3 and advances.Closed power switch, electric current is transported to many electric heating tubes 3 by binding post 5, radiation heating soldering in managing.Welding brings out pallet 7 after finishing heat exchanger is withdrawed from solderer, that is withdraws from electric heating tube 3, powered-down.Opening and closing power switch is the simplest and the minimum control method of cost.
Claims (5)
1. tube fin brazing process has following feature: is that low filling brazing solder is loaded the gap, junction with fusing point than weldment, the band fin shape tubular type conduit weldment that assembles solder is placed on the carriage, and Chemical cleaning is carried out on weldment to be brazed surface; Shaft-like electric heating tube stretched in conduit, manage interior radiation heating, make the at first wetting and deposited full conduit outer wall of solder and be full of the joint clearance of brazing, communicate the temperature on the fin flanging by liquid solder again, after reaching brazing temperature, diffusion and dissolving by atom between solder and conduit and the flanging form metallurgical binding afterwards; Pause the cooled and solidified liquid solder then.
2. tube fin brazing process as claimed in claim 1 is characterized in that, brazing temperature selects to be lower than the temperature of weldment material melting point, and the holding time was controlled at 3～8 minutes or more longer.
3. internal tube heating soldering machine that uses the described tube fin brazing process of claim 1 is characterized in that: by fuselage cradle (6) be contained in the carriage (13) of fuselage cradle (6) front end, and the heating tube support (4) that is installed in carriage (13) is formed.
4. internal tube heating soldering machine according to claim 3 is characterized in that, each heating tube support (4) is electrically connected electric heating tube (3) by the power patch panel (14) on the carriage (13).
5. internal tube heating soldering machine according to claim 4 is characterized in that, is furnished with one to heating current with regulate the controller of control heat time heating time between power patch panel (14) and power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100455001A CN101318245A (en) | 2008-07-08 | 2008-07-08 | Tube fin brazing process and internal tube heating soldering machine for |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100455001A CN101318245A (en) | 2008-07-08 | 2008-07-08 | Tube fin brazing process and internal tube heating soldering machine for |
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| CN101318245A true CN101318245A (en) | 2008-12-10 |
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|---|---|---|---|
| CNA2008100455001A Pending CN101318245A (en) | 2008-07-08 | 2008-07-08 | Tube fin brazing process and internal tube heating soldering machine for |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284757A (en) * | 2010-06-18 | 2011-12-21 | 中国北车集团大连机车研究所有限公司 | Plate-type radiator and production method thereof |
| CN102310241A (en) * | 2010-07-01 | 2012-01-11 | 广东万和新电气股份有限公司 | Method for manufacturing aluminium heat exchanger of gas water heater |
| CN102744484A (en) * | 2011-04-22 | 2012-10-24 | 中国科学院电子学研究所 | Special system for braze joint between radiator and collector of STWT (Spatial Travelling Wave Tube) |
| CN103600149A (en) * | 2013-11-15 | 2014-02-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Brazing method for thin-wall heat conducting pipes |
| CN109153091A (en) * | 2016-05-20 | 2019-01-04 | 爱励轧制产品德国有限责任公司 | Method and apparatus for manufacturing brazing heat exchanger |
| CN110653613A (en) * | 2019-10-11 | 2020-01-07 | 丽水莲都明报自动化科技有限公司 | Honeycomb metal tubular product apparatus for producing |
| CN111389938A (en) * | 2020-03-31 | 2020-07-10 | 燕山大学 | Heating system and heating method for drill steel tube blank |
| CN112845661A (en) * | 2020-12-30 | 2021-05-28 | 广东澳森热交换系统有限公司 | Expanded tube welding production method of simple evaporator |
| CN113399815A (en) * | 2021-06-24 | 2021-09-17 | 内蒙古工业大学 | Fluid conduction branch pipe and main pipe edge-curling welding equipment |
-
2008
- 2008-07-08 CN CNA2008100455001A patent/CN101318245A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284757A (en) * | 2010-06-18 | 2011-12-21 | 中国北车集团大连机车研究所有限公司 | Plate-type radiator and production method thereof |
| CN102310241A (en) * | 2010-07-01 | 2012-01-11 | 广东万和新电气股份有限公司 | Method for manufacturing aluminium heat exchanger of gas water heater |
| CN102744484A (en) * | 2011-04-22 | 2012-10-24 | 中国科学院电子学研究所 | Special system for braze joint between radiator and collector of STWT (Spatial Travelling Wave Tube) |
| CN102744484B (en) * | 2011-04-22 | 2014-09-17 | 中国科学院电子学研究所 | Special system for braze joint between radiator and collector of STWT (Spatial Travelling Wave Tube) |
| CN103600149A (en) * | 2013-11-15 | 2014-02-26 | 沈阳黎明航空发动机(集团)有限责任公司 | Brazing method for thin-wall heat conducting pipes |
| CN103600149B (en) * | 2013-11-15 | 2015-11-18 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of method for welding of thin-wallconduit heat exchanger |
| CN109153091A (en) * | 2016-05-20 | 2019-01-04 | 爱励轧制产品德国有限责任公司 | Method and apparatus for manufacturing brazing heat exchanger |
| US11529695B2 (en) | 2016-05-20 | 2022-12-20 | Novelis Koblenz Gmbh | Brazing a heat exchanger with a moving brazing tool |
| CN110653613A (en) * | 2019-10-11 | 2020-01-07 | 丽水莲都明报自动化科技有限公司 | Honeycomb metal tubular product apparatus for producing |
| CN111389938A (en) * | 2020-03-31 | 2020-07-10 | 燕山大学 | Heating system and heating method for drill steel tube blank |
| CN111389938B (en) * | 2020-03-31 | 2020-12-29 | 燕山大学 | Heating system and heating method for drill steel tube blank |
| CN112845661A (en) * | 2020-12-30 | 2021-05-28 | 广东澳森热交换系统有限公司 | Expanded tube welding production method of simple evaporator |
| CN113399815A (en) * | 2021-06-24 | 2021-09-17 | 内蒙古工业大学 | Fluid conduction branch pipe and main pipe edge-curling welding equipment |
| CN113399815B (en) * | 2021-06-24 | 2023-03-21 | 内蒙古工业大学 | Fluid conduction branch pipe and main pipe edge-curling welding equipment |
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Open date: 20081210 |