CN106425003B - A kind of heating device and method of complex section flame brazing of aluminium bar section - Google Patents
A kind of heating device and method of complex section flame brazing of aluminium bar section Download PDFInfo
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- CN106425003B CN106425003B CN201610870992.2A CN201610870992A CN106425003B CN 106425003 B CN106425003 B CN 106425003B CN 201610870992 A CN201610870992 A CN 201610870992A CN 106425003 B CN106425003 B CN 106425003B
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- brazing
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/04—Heating appliances
- B23K3/043—Flame-heated appliances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention provides the heating devices and method of a kind of complex section flame brazing of aluminium bar section；Two gas brazing tips pass through clamper respectively and are connected and fixed bracket, are symmetrically distributed in weld seam two sides, and the angle of the gas brazing tip and aid device is arbitrarily adjustable, and fixed bracket is mounted on walking dolly, can move back and forth along the weld seam of workpiece.Brazing product productivity, quality, precision and efficiency of the invention is greatly improved, and 50% or more production efficiency can be improved, and operation, uses simplicity at control.The present invention greatly reduces the operation difficulty of aluminium alloy manual soldering, reduces the labor intensity of operator, solves aluminium soldering gas brazing heating and Welding Problems.
Description
Technical field
Advanced molding and technology the invention belongs to advanced manufacturing technology field are related to a kind of heating skill of aluminium soldering
Art.
Background technique
Aluminium alloy not only has high specific strength, specific modulus, fracture toughness, fatigue strength and corrosion-resistant stability, simultaneously
Also there is good forming technology and good weldability, therefore it is coloured to become most widely used one kind in aerospace industry
Structural metallic materials.Due to its distinctive physics, chemical property, a series of difficulties can be encountered in welding process, such as oxidation, weldering
Stitch fire check and stomata etc..Welding for aluminium alloy, traditional method is mainly based on fusion welding, but equipment is relatively multiple
It is miscellaneous and stringenter to the technical requirements of welder.It is brazed the important method connected as aluminium alloy, small with brazing member deformation,
The advantages that dimensional accuracy is high has obtained being widely applied very much in recent years.
Welding for aluminum profile door and window, soldering are a kind of suitable selections.Since the size of product is larger, pricker in furnace
Weldering, vacuum brazing etc. are all difficult with using the method for welding of soldering stove, and the gas brazing that equipment is simple and convenient to operate is made
For a kind of important welding method, using the brazing filler metal fusing point feature lower than base material, by base material be heated to above brazing filler metal fusing point 20~
50 DEG C, at this moment base material is non-fusible, removes oxide film dissolving by brazing flux, and in the gap for the solder welding required for two base materials melted
Wet, cross flow, is then mutually dissolved with two base materials, spreads, be welding as one two base materials after cooled and solidified.Because in its welding process
Base material is non-fusible, avoid the crystal grain in fusion welding process grow up, corrosion phenomena such as, become the ideal choosing of aluminum alloy doors and windows welding
It selects.
But since there is one layer of fine and close Al on the surface of aluminium and aluminium alloy2O3Oxidation film, this oxidation membrane stability is very high,
Fusing point is up to 2300 DEG C or so, the serious progress for interfering welding process.And the fusing point of aluminium and its alloy is very low, only 660 DEG C
Left and right, the Al of it and surface2O3Oxidation film is compared, and a fusing point is very high, and one again very low, and fusing point is high by fusing point
Low packet inside, just causes the difficulty of welding.In addition to this, during weld heating, color becomes for aluminium and its alloy
Change it is unobvious so that welding operation it is more difficult.
It since aluminium alloy extrusions generally all has more complicated section form, is uneven, causes feed heating difficult,
Cause that automatic welding cannot be implemented, at present substantially all using manual soldering technique.How the operation of aluminium alloy brazing is reduced
Difficulty, other than the continuously improving of welding material, improvement for heating means and equipment makes operator be easy to upper hand,
This is the key point of the current Technique Popularizing.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of heating dress of complex section flame brazing of aluminium bar section
It sets, can be effectively reduced the operation difficulty of aluminium alloy manual soldering.
The technical solution adopted by the present invention to solve the technical problems is: a kind of complex section flame brazing of aluminium bar section plus
Thermal, including clamper, gas brazing tip and fixed bracket；The fixation bracket is mounted on walking dolly, can
Weld seam along workpiece moves back and forth；Two gas brazing tips pass through clamper respectively and are connected and fixed bracket, are symmetrically distributed in weldering
Two sides are stitched, the angle of the gas brazing tip and aid device is arbitrarily adjustable.
The gas brazing tip is apart from 70~80mm of workpiece surface；The flame of gas brazing tip is ejected into workpiece table
10~the 20mm of positional distance weld seam in face；At the same time by two gas brazing tips and perpendicular in the plane of workpiece surface,
The flame injection direction of gas brazing tip and workpiece surface are in 45 degree of angles, and the flame injection direction of two gas brazing tips
Towards weld seam；In the plane passed through gas brazing tip and be parallel to weld seam, the flame injection direction of gas brazing tip
It is in 45~60 degree of angles with workpiece surface.
The present invention also provides a kind of heating means of complex section flame brazing of aluminium bar section, comprising the following steps:
1) workpiece is carried out welding preceding cleaning；
2) workpiece is welded using solder preset mode, when welding, gas brazing tip apart from workpiece surface 70~
80mm；The flame of gas brazing tip is ejected into 10~20mm of positional distance weld seam of workpiece surface；Pass through two fire at the same time
Flame brazing welding tip and perpendicular in the plane of workpiece surface, the flame injection direction and workpiece surface of gas brazing tip are in 45 degree
Angle, and the flame injection direction of two gas brazing tips is towards weld seam；Pass through gas brazing tip and is parallel to weld seam
Plane on, the flame injection direction of gas brazing tip and workpiece surface are in 45~60 degree of angles；Gas brazing tip is in workpiece
It is moved back and forth with the speed of 100mm/s along weld seam on surface；
3) postwelding cleaning is carried out to the residue of workpiece surface.
The greasy dirt first using acetone removal workpiece surface is cleaned before the weldering of the step (1)；Then workpiece is immersed 60
DEG C, take out after alkali cleaning 20s in the NaOH solution that mass fraction is 10%, and rinsed well with clear water；Workpiece is finally immersed into matter
Measure the HNO that score is 20%3It takes out, is rinsed well with clear water, and dried up with compressed air after bright erosion 30s in solution, standby weldering.
The weld interval of the step (2) is 30~60S, and the distance of reciprocating motion is 50~100mm, is soldered to brazing flux
State from milky glue state change be grey liquid.
The postwelding cleaning of the step (3) first cleans out workpiece surface residue with hairbrush；Then it puts the workpiece in
10~20s of alkali cleaning in the NaOH solution that mass fraction is 10%, then rinsed well with clear water；Finally put the workpiece in mass fraction
For 20% HNO3Bright erosion 30s, is rinsed well with clear water and is dried up with compressed air in solution.
The beneficial effects of the present invention are: in the welding process, by the way that the pitching of welding gun is arranged, ensure that flame will not blow-through
Weld seam blows away solder；It is heated using lateral rush-harvesting and rush-planting, effectively increases heating efficiency；And weldering is heated by the way of moving back and forth
Region is stitched, and can guarantee that aluminium alloy extrusions uniformly reaches brazing temperature and is not easy by scorification.So brazing product productivity,
Quality, precision and efficiency are greatly improved, and 50% or more production efficiency can be improved, and operation, uses simplicity at control.This hair
The bright operation difficulty for greatly reducing aluminium alloy manual soldering, reduces the labor intensity of operator, solves aluminium soldering flame
Soldering heating and Welding Problems.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention, wherein (a) is the front view of heating device and workpiece, is (b) heating dress
It sets and the side view of workpiece；
Fig. 2 is flow chart of the method for the present invention；
In figure, 1- workpiece (framework that aluminum profile is formed), 2- gas brazing tip, 3- clamper, the fixed bracket of 4-, 5- weldering
Seam.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples, and the present invention includes but are not limited to following implementations
Example.
The invention belongs to aluminium soldering heating control technology, the aluminium soldering heating process that can apply in welding process is automatic
Adjustment field, principle are as follows: adjustment soldering heating device guarantees light in advance by adjusting heated height, heating location and angle
Micro-carbon flame, welding flame heat within the scope of the two sides 10-20mm of soldered seam；The hunting frequency of head is preset, is transported
Dynamic speed is about 100mm/s or so；When welding, head reciprocally swinging, welding process uses solder preset mode, setting heating
Time, the state change by observing brazing flux change as grey liquid from milky glue state, are finally completed aluminium alloy extrusions
Soldering.
Aluminium alloy brazing heating mechanism provided by the invention is made of clamper, gas brazing tip, fixed bracket.Specifically
Group prejudice Fig. 1.Wherein, gas brazing welding nozzle component is connect with clamper, and welding nozzle component angle 0-180 degree is adjustable；Clamper peace
On fixed bracket；Fixed bracket is fixed on walking dolly, may be implemented to move back and forth along weld seam.
The gas brazing tip is apart from 70~80mm of workpiece surface；The flame of gas brazing tip is ejected into workpiece table
10~the 20mm of positional distance weld seam in face；At the same time by two gas brazing tips and perpendicular in the plane of workpiece surface,
The flame injection direction of gas brazing tip and workpiece surface are in 45 degree of angles, and the flame injection direction of two gas brazing tips
Towards weld seam；In the plane passed through gas brazing tip and be parallel to weld seam, the flame injection direction of gas brazing tip
It is in 45~60 degree of angles with workpiece surface.
The specific work step of aluminium alloy brazing heating mechanism are as follows:
1) original state and angle for adjusting heating equipment guarantee that, using slight carburizing flame, welding flame heating is being brazed
Within the scope of the two sides 10-20mm of weld seam；
2) movement velocity of head is set as 100mm/s；
3) solder preset mode, head short distance reciprocally swinging, by the shape for observing brazing flux solder are used in welding process
The soldering of aluminium alloy extrusions is completed in state variation.
Example 1
Welding aluminum alloy doorframe.
It carries out welding preceding cleaning first, using the greasy dirt of acetone removal workpiece surface；It is by 60 DEG C of workpiece immersion, mass fraction
It takes out after alkali cleaning 20s in 10% NaOH solution, and is rinsed well with clear water；Workpiece is immersed into the HNO that mass fraction is 20%3
It takes out, is rinsed well with clear water, and dried up with compressed air after bright erosion 30s in solution, standby weldering.
When welding, by adjusting heated height, heating location and angle, guarantee welding flame heating the two of soldered seam
Within the scope of the 10-20mm of side；The hunting frequency of head is set, realizes within about 2 seconds primary reciprocal, swinging distance 100mm or so；Machine
Head reciprocally swinging, sets heating time 50-60 seconds, and welding process uses solder preset mode, is heated, is passed through with even flame
The state change for observing brazing flux solder completes the soldering of aluminium alloy extrusions.Final solder borrows heat melts on workpiece, and wet rapidly
Profit, cross flow joint filling.Workpiece is naturally cooled to 100 DEG C or less and places into clear water by postwelding to be cleaned, to prevent the deformation of workpiece Quench.
After welding treatment are as follows: clean out workpiece surface residue with hairbrush；Putting the workpiece in mass fraction is 10%
10~20s of alkali cleaning in NaOH solution, is then rinsed well with clear water again；Put the workpiece in the HNO that mass fraction is 20%3Solution
In bright erosion 30s, then rinsed well with clear water and dried up again with compressed air.
Example 2
Welding aluminum alloy window frame profile.
It carries out welding preceding cleaning first, using the greasy dirt of acetone removal workpiece surface；It is by 60 DEG C of workpiece immersion, mass fraction
It takes out after alkali cleaning 20s in 10% NaOH solution, and is rinsed well with clear water；Workpiece is immersed into the HNO that mass fraction is 20%3
It takes out, is rinsed well with clear water, and dried up with compressed air after bright erosion 30s in solution, standby weldering.
When welding, by adjusting heated height, heating location and angle, guarantee welding flame heating the two of soldered seam
Within the scope of the 10-20mm of side；The hunting frequency of head is set, realizes within about 2 seconds primary reciprocal, swinging distance 80mm or so；Head
Reciprocally swinging is set heating time 40-50 seconds, and welding process uses solder preset mode, is heated with even flame, is passed through sight
The state change for examining brazing flux solder completes the soldering of aluminium alloy extrusions.Final solder borrows heat melts on workpiece, and moistens rapidly,
Cross flow joint filling.Workpiece is naturally cooled to 100 DEG C or less and places into clear water by postwelding to be cleaned, to prevent the deformation of workpiece Quench.
After welding treatment are as follows: clean out workpiece surface residue with hairbrush；Putting the workpiece in mass fraction is 10%
10~20s of alkali cleaning in NaOH solution, is then rinsed well with clear water again；Put the workpiece in the HNO that mass fraction is 20%3Solution
In bright erosion 30s, then rinsed well with clear water and dried up again with compressed air.
Example 3
Welding aluminum alloy aperture profile.
It carries out welding preceding cleaning first, using the greasy dirt of acetone removal workpiece surface；It is by 60 DEG C of workpiece immersion, mass fraction
It takes out after alkali cleaning 20s in 10% NaOH solution, and is rinsed well with clear water；Workpiece is immersed into the HNO that mass fraction is 20%3
It takes out, is rinsed well with clear water, and dried up with compressed air after bright erosion 30s in solution, standby weldering.
When welding, by adjusting heated height, heating location and angle, guarantee welding flame heating the two of soldered seam
Within the scope of the 10-20mm of side；The hunting frequency of head is set, realizes within about 2 seconds primary reciprocal, swinging distance 50mm or so；Head
Reciprocally swinging is set heating time 35-45 seconds, and welding process uses solder preset mode, is heated with even flame, is passed through sight
The state change for examining brazing flux solder completes the soldering of aluminium alloy extrusions.Final solder borrows heat melts on workpiece, and moistens rapidly,
Cross flow joint filling.Workpiece is naturally cooled to 100 DEG C or less and places into clear water by postwelding to be cleaned, to prevent the deformation of workpiece Quench.
After welding treatment are as follows: clean out workpiece surface residue with hairbrush；Putting the workpiece in mass fraction is 10%
10~20s of alkali cleaning in NaOH solution, is then rinsed well with clear water again；Put the workpiece in the HNO that mass fraction is 20%3Solution
In bright erosion 30s, then rinsed well with clear water and dried up again with compressed air.
Claims (5)
1. a kind of heating device of complex section flame brazing of aluminium bar section, including clamper, gas brazing tip and fixed bracket,
It is characterized by: the fixation bracket is mounted on walking dolly, can be moved back and forth along the weld seam of workpiece；Two flame prickers
Weldering tip passes through clamper respectively and is connected and fixed bracket, is symmetrically distributed in weld seam two sides, the gas brazing tip and clamping
The angle of device is arbitrarily adjustable；
The gas brazing tip is apart from 70~80mm of workpiece surface；The flame of gas brazing tip is ejected into workpiece surface
10~20mm of positional distance weld seam；At the same time by two gas brazing tips and perpendicular in the plane of workpiece surface, flame
The flame injection direction of brazing welding tip and workpiece surface are in 45 degree of angles, and the equal court of flame injection direction of two gas brazing tips
To weld seam；In the plane passed through gas brazing tip and be parallel to weld seam, the flame injection direction and work of gas brazing tip
Part surface is in 45~60 degree of angles.
2. a kind of heating means of the complex section flame brazing of aluminium bar section using claim 1 described device, it is characterised in that
Include the following steps:
1) workpiece is carried out welding preceding cleaning；
2) workpiece is welded using solder preset mode, when welding, gas brazing tip is apart from 70~80mm of workpiece surface；
The flame of gas brazing tip is ejected into 10~20mm of positional distance weld seam of workpiece surface；Pass through two gas brazings at the same time
Tip and perpendicular in the plane of workpiece surface, the flame injection direction and workpiece surface of gas brazing tip are in 45 degree of angles, and
The flame injection direction of two gas brazing tips is towards weld seam；By gas brazing tip and it is being parallel to the plane of weld seam
On, the flame injection direction and workpiece surface of gas brazing tip are in 45~60 degree of angles；Gas brazing tip is on the surface of the workpiece
It is moved back and forth with the speed of 100mm/s along weld seam；
3) postwelding cleaning is carried out to the residue of workpiece surface.
3. the heating means of complex section flame brazing of aluminium bar section according to claim 2, it is characterised in that: the step
1) greasy dirt first using acetone removal workpiece surface is cleaned before weldering；Then workpiece is immersed into 60 DEG C, mass fraction 10%
NaOH solution in take out after alkali cleaning 20s, and rinsed well with clear water；Workpiece is finally immersed into the HNO that mass fraction is 20%3
It takes out, is rinsed well with clear water, and dried up with compressed air after bright erosion 30s in solution, standby weldering.
4. the heating means of complex section flame brazing of aluminium bar section according to claim 2, it is characterised in that: the step
2) weld interval is 30~60s, and the distance of reciprocating motion is 50~100mm, and the state for being soldered to brazing flux is gluey from milky
State variation is grey liquid.
5. the heating means of complex section flame brazing of aluminium bar section according to claim 2, it is characterised in that: the step
3) postwelding cleaning first cleans out workpiece surface residue with hairbrush；Then putting the workpiece in mass fraction is 10%
10~20s of alkali cleaning in NaOH solution, then rinsed well with clear water；Finally put the workpiece in the HNO that mass fraction is 20%3Solution
In bright erosion 30s, rinsed well with clear water and dried up with compressed air.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610870992.2A CN106425003B (en) | 2016-09-30 | 2016-09-30 | A kind of heating device and method of complex section flame brazing of aluminium bar section |
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| CN201610870992.2A CN106425003B (en) | 2016-09-30 | 2016-09-30 | A kind of heating device and method of complex section flame brazing of aluminium bar section |
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| CN106425003B true CN106425003B (en) | 2019-03-19 |
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| CN114273742B (en) * | 2022-02-21 | 2023-04-07 | 绍兴新锐大进焊接设备有限公司 | Flame brazing control method for copper-aluminum welding and automatic welding machine |
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