CN115401351B - Welding process of aluminum alloy profile - Google Patents
Welding process of aluminum alloy profile Download PDFInfo
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- CN115401351B CN115401351B CN202210981789.8A CN202210981789A CN115401351B CN 115401351 B CN115401351 B CN 115401351B CN 202210981789 A CN202210981789 A CN 202210981789A CN 115401351 B CN115401351 B CN 115401351B
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- 238000003466 welding Methods 0.000 title claims abstract description 224
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 163
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003973 paint Substances 0.000 claims abstract description 57
- 244000137852 Petrea volubilis Species 0.000 claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 21
- 239000012535 impurity Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012670 alkaline solution Substances 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 claims description 92
- 239000002893 slag Substances 0.000 claims description 42
- 238000005507 spraying Methods 0.000 claims description 10
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000007517 polishing process Methods 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000002932 luster Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 7
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
The invention relates to the technical field of aluminum alloy welding, in particular to a welding process of an aluminum alloy section, which comprises the following steps: step one: selecting an aluminum alloy section capable of being matched with welding, and performing primary water cleaning treatment on the surface of the processed aluminum alloy section to remove adhesion of dust impurities; step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% alkaline solution, and corroding at 80-90 ℃ for 4-5min; the aluminum alloy section manufactured by welding is firstly polished on the surface of the smooth aluminum alloy section by adopting the polished sand paper in the welding operation process, so that the surface has no residue of an old paint film, the quality of welding connection is improved, the surface of a welding area has anti-skid textures and forming effects, the bonding of fingers of workers and a rough surface in the welding process is enough, and the anti-skid textures are also enough to give feedback to hands when equipment moves towards, so that the welding process is close to uniform speed, and the stable welding interval and welding effect are achieved.
Description
Technical Field
The invention relates to the technical field of aluminum alloy welding, in particular to a welding process of aluminum alloy sections.
Background
When the section bar sprayed with paint is welded, the old paint film is required to be removed, the cleaning effect of the surface of the aluminum alloy before welding in the prior art is poor, the residual of the old paint film exists, the welding quality is affected, the surface of the aluminum alloy section bar is smooth, the trend stability of a welding rod is not facilitated, meanwhile, the moving speed of the welding rod is inconsistent, and the welding position is caused to deviate.
Disclosure of Invention
The invention aims to provide a welding process of aluminum alloy profiles, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a welding process of an aluminum alloy section comprises the following steps:
Step one: selecting an aluminum alloy section capable of being matched with welding, and performing primary water cleaning treatment on the surface of the processed aluminum alloy section to remove adhesion of dust impurities;
Step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% alkaline solution, and corroding at 80-90 ℃ for 4-5min;
Step three: after the corrosion is finished, the aluminum alloy section is put into a 10% nitric acid solution for treatment and washing;
Step four: taking out the washed aluminum alloy section, drying the area to be welded, polishing the dried area, thoroughly removing the old paint film adhered on the surface of the aluminum alloy section, and polishing to roughen the surface of the welded area;
step five: butt-jointing a plurality of groups of polished aluminum alloy section welding seams, clamping and fixing the aluminum alloy section through a clamp, and using welding rods connected through welding equipment to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag to be smooth, and then cooling the welding position;
Step seven: the polished aluminum alloy section surface is subjected to paint spraying treatment, and the surface of a welding area is rough, so that the paint surface is more firmly adhered;
The surface polishing operation in the fourth step specifically comprises the following steps of;
s41: fixing the aluminum alloy section on a polishing tabletop;
S42: the method comprises the steps of roughly brushing off an old paint film on the surface of an aluminum alloy section by using a steel wire brush, removing a large-area old paint film on the surface of the aluminum alloy section, forming a rough grinding area, and then blowing and cleaning the rough grinding area to remove paint film impurities on the surface;
s43: selecting 80-100 mesh sand paper, fixing the sand paper on a polishing component, contacting with the surface of an aluminum alloy profile to polish the rough grinding area for the second time, spraying the polishing area in the polishing process, and removing impurities generated by polishing;
S44: detecting the surface of the polished aluminum alloy section by using a charge coupled device, and detecting whether an old paint film remains on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in S44, the polishing is qualified, and the polishing operation is finished;
S46: if an old paint film exists on the surface of the aluminum alloy section in the step S44, the polishing is unqualified, 80-100 mesh sand paper is selected for continuous polishing, and then the step S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps of;
S51: placing a plurality of groups of polished aluminum alloy sections on a flat table top, butting welding seams of the two groups of sections, and adjusting the angles of the welding seams;
S52: clamping and fixing the adjacent welded aluminum alloy sections through a clamp;
S53: measuring welding angles of two groups of aluminum alloy sections fixed on the table top through an angle measuring instrument, and determining whether the welding angles meet welding requirements;
S54: if the measured data of the angle measuring instrument in S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and the worker can use fingers to contact the surface of the metal section to form a certain support, and meanwhile, the rough surface of the weldment can be attached to the skin of the fingers to weld at a uniform speed;
S55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the requirement of the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
The welding slag polishing operation in the step six specifically comprises the following steps of;
s61: polishing a welded area of the welded aluminum alloy section by using a grinder, and enabling the height of the raised welding slag to trend to the surface of the aluminum alloy section;
s62: finely polishing the polished welding area of the grinder by using 800-1000 meshes of sand paper, and enabling the welding area of the aluminum alloy section to form a smooth surface;
s63: measuring the aluminum alloy section after finishing fine grinding by adopting a horizontal measuring instrument, and determining whether the surface of a grinding area is smooth and even;
s64: if the welding slag in the welding area in S63 is kept flat and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is met;
s65: if the welding slag in the welding area in the S63 is not level and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is not met, and the step S62 is repeated.
Preferably, the cleaning of the selected aluminum alloy section in the first step specifically further includes cleaning the welding seam area of the aluminum alloy section.
Preferably, the alkaline solution in the second step is any one of sodium hydroxide, dimethylformamide and dichloromethane solution.
Preferably, the welding area is polished in the fourth step, the polishing depth is determined by the thickness of the residual old paint film, and the metallic luster is ensured to be exposed, so that no residual old paint film exists on the surface.
Preferably, the roughness of the running area of the welding rod in the step five welding process is nearly consistent, the anti-skid texture is enough to give feedback to the hands when the equipment runs, so that the welding process is nearly uniform, and the welding distance between the welding rod and the aluminum alloy section bar is 2-4mm.
Preferably, the surface of the aluminum alloy section bar after the step five polishing should form an anti-skid texture.
Preferably, in the sixth step, the welding position is cooled by air cooling, and slag is removed from the welding area for cooling.
Compared with the prior art, the invention has the beneficial effects that:
Polishing the surface of the smooth aluminum alloy section by adopting polishing sand paper, particularly polishing the surface of a welding area, wherein the polishing area is larger than the welding area, the polishing depth is determined by the thickness of the residual old paint film, the exposed metallic luster is ensured, the surface is free from the residual old paint film, and the quality of welding connection is improved; the surface of the welding area is provided with anti-skid textures and forming effects, the bonding of the fingers of workers and the rough surface in the welding process can enable the welding rod and welding equipment to move relatively uniformly and continuously and stably, the anti-skid textures are also sufficient for giving feedback to hands when the equipment moves, the welding process is close to uniform speed, equal welding intervals are kept between the welding rod and the aluminum alloy section bar, and the welding intervals are between 2 mm and 4mm, so that a stable welding effect is achieved.
Drawings
FIG. 1 is a schematic diagram of a welding process according to the present invention;
FIG. 2 is a flow chart of the polishing process of the present invention;
FIG. 3 is a flow chart of a detection welding process of the present invention;
Fig. 4 is a flow chart of the slag grinding process of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiment one:
the welding process of the aluminum alloy section bar comprises the following steps:
Step one: selecting an aluminum alloy section capable of being matched with welding, and performing primary water cleaning treatment on the surface of the processed aluminum alloy section to remove adhesion of dust impurities;
Step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% alkaline solution of sodium hydroxide, and corroding at 80-90 ℃ for 4-5min;
Step three: after the corrosion is finished, the aluminum alloy section is put into a 10% nitric acid solution for treatment and washing;
Step four: taking out the washed aluminum alloy section, drying the area to be welded, polishing the dried area, thoroughly removing the old paint film adhered on the surface of the aluminum alloy section, and polishing to roughen the surface of the welded area;
step five: butt-jointing a plurality of groups of polished aluminum alloy section welding seams, clamping and fixing the aluminum alloy section through a clamp, and using welding rods connected through welding equipment to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag to be smooth, and then cooling the welding position;
Step seven: the polished aluminum alloy section surface is subjected to paint spraying treatment, and the surface of a welding area is rough, so that the paint surface is more firmly adhered;
The surface polishing operation in the fourth step specifically comprises the following steps of;
s41: fixing the aluminum alloy section on a polishing tabletop;
S42: the method comprises the steps of roughly brushing off an old paint film on the surface of an aluminum alloy section by using a steel wire brush, removing a large-area old paint film on the surface of the aluminum alloy section, forming a rough grinding area, and then blowing and cleaning the rough grinding area to remove paint film impurities on the surface;
s43: selecting 80-100 mesh sand paper, fixing the sand paper on a polishing component, contacting with the surface of an aluminum alloy profile to polish the rough grinding area for the second time, spraying the polishing area in the polishing process, and removing impurities generated by polishing;
S44: detecting the surface of the polished aluminum alloy section by using a charge coupled device, and detecting whether an old paint film remains on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in S44, the polishing is qualified, and the polishing operation is finished;
S46: if an old paint film exists on the surface of the aluminum alloy section in the step S44, the polishing is unqualified, 80-100 mesh sand paper is selected for continuous polishing, and then the step S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps of;
S51: placing a plurality of groups of polished aluminum alloy sections on a flat table top, butting welding seams of the two groups of sections, and adjusting the angles of the welding seams;
S52: clamping and fixing the adjacent welded aluminum alloy sections through a clamp;
S53: measuring welding angles of two groups of aluminum alloy sections fixed on the table top through an angle measuring instrument, and determining whether the welding angles meet welding requirements;
S54: if the measured data of the angle measuring instrument in S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and the worker can use fingers to contact the surface of the metal section to form a certain support, and meanwhile, the rough surface of the weldment can be attached to the skin of the fingers to weld at a uniform speed;
S55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the requirement of the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
The welding slag polishing operation in the step six specifically comprises the following steps of;
s61: polishing a welded area of the welded aluminum alloy section by using a grinder, and enabling the height of the raised welding slag to trend to the surface of the aluminum alloy section;
s62: finely polishing the polished welding area of the grinder by using 800-1000 meshes of sand paper, and enabling the welding area of the aluminum alloy section to form a smooth surface;
s63: measuring the aluminum alloy section after finishing fine grinding by adopting a horizontal measuring instrument, and determining whether the surface of a grinding area is smooth and even;
s64: if the welding slag in the welding area in S63 is kept flat and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is met;
s65: if the welding slag in the welding area in the S63 is not level and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is not met, and the step S62 is repeated.
Embodiment two:
the welding process of the aluminum alloy section bar comprises the following steps:
Step one: selecting an aluminum alloy section capable of being matched with welding, and performing primary water cleaning treatment on the surface of the processed aluminum alloy section to remove adhesion of dust impurities;
step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% dimethylformamide, and corroding at 80-90 ℃ for 4-5min;
Step three: after the corrosion is finished, the aluminum alloy section is put into a 10% nitric acid solution for treatment and washing;
Step four: taking out the washed aluminum alloy section, drying the area to be welded, polishing the dried area, thoroughly removing the old paint film adhered on the surface of the aluminum alloy section, and polishing to roughen the surface of the welded area;
step five: butt-jointing a plurality of groups of polished aluminum alloy section welding seams, clamping and fixing the aluminum alloy section through a clamp, and using welding rods connected through welding equipment to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag to be smooth, and then cooling the welding position;
Step seven: the polished aluminum alloy section surface is subjected to paint spraying treatment, and the surface of a welding area is rough, so that the paint surface is more firmly adhered;
The surface polishing operation in the fourth step specifically comprises the following steps of;
s41: fixing the aluminum alloy section on a polishing tabletop;
S42: the method comprises the steps of roughly brushing off an old paint film on the surface of an aluminum alloy section by using a steel wire brush, removing a large-area old paint film on the surface of the aluminum alloy section, forming a rough grinding area, and then blowing and cleaning the rough grinding area to remove paint film impurities on the surface;
s43: selecting 80-100 mesh sand paper, fixing the sand paper on a polishing component, contacting with the surface of an aluminum alloy profile to polish the rough grinding area for the second time, spraying the polishing area in the polishing process, and removing impurities generated by polishing;
S44: detecting the surface of the polished aluminum alloy section by using a charge coupled device, and detecting whether an old paint film remains on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in S44, the polishing is qualified, and the polishing operation is finished;
S46: if an old paint film exists on the surface of the aluminum alloy section in the step S44, the polishing is unqualified, 80-100 mesh sand paper is selected for continuous polishing, and then the step S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps of;
S51: placing a plurality of groups of polished aluminum alloy sections on a flat table top, butting welding seams of the two groups of sections, and adjusting the angles of the welding seams;
S52: clamping and fixing the adjacent welded aluminum alloy sections through a clamp;
S53: measuring welding angles of two groups of aluminum alloy sections fixed on the table top through an angle measuring instrument, and determining whether the welding angles meet welding requirements;
S54: if the measured data of the angle measuring instrument in S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and the worker can use fingers to contact the surface of the metal section to form a certain support, and meanwhile, the rough surface of the weldment can be attached to the skin of the fingers to weld at a uniform speed;
S55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the requirement of the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
The welding slag polishing operation in the step six specifically comprises the following steps of;
s61: polishing a welded area of the welded aluminum alloy section by using a grinder, and enabling the height of the raised welding slag to trend to the surface of the aluminum alloy section;
s62: finely polishing the polished welding area of the grinder by using 800-1000 meshes of sand paper, and enabling the welding area of the aluminum alloy section to form a smooth surface;
s63: measuring the aluminum alloy section after finishing fine grinding by adopting a horizontal measuring instrument, and determining whether the surface of a grinding area is smooth and even;
s64: if the welding slag in the welding area in S63 is kept flat and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is met;
s65: if the welding slag in the welding area in the S63 is not level and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is not met, and the step S62 is repeated.
Embodiment III:
the welding process of the aluminum alloy section bar comprises the following steps:
Step one: selecting an aluminum alloy section capable of being matched with welding, and performing primary water cleaning treatment on the surface of the processed aluminum alloy section to remove adhesion of dust impurities;
step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% of dichloromethane solution, and corroding at 80-90 ℃ for 4-5min;
Step three: after the corrosion is finished, the aluminum alloy section is put into a 10% nitric acid solution for treatment and washing;
Step four: taking out the washed aluminum alloy section, drying the area to be welded, polishing the dried area, thoroughly removing the old paint film adhered on the surface of the aluminum alloy section, and polishing to roughen the surface of the welded area;
step five: butt-jointing a plurality of groups of polished aluminum alloy section welding seams, clamping and fixing the aluminum alloy section through a clamp, and using welding rods connected through welding equipment to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag to be smooth, and then cooling the welding position;
Step seven: the polished aluminum alloy section surface is subjected to paint spraying treatment, and the surface of a welding area is rough, so that the paint surface is more firmly adhered;
The surface polishing operation in the fourth step specifically comprises the following steps of;
s41: fixing the aluminum alloy section on a polishing tabletop;
S42: the method comprises the steps of roughly brushing off an old paint film on the surface of an aluminum alloy section by using a steel wire brush, removing a large-area old paint film on the surface of the aluminum alloy section, forming a rough grinding area, and then blowing and cleaning the rough grinding area to remove paint film impurities on the surface;
s43: selecting 80-100 mesh sand paper, fixing the sand paper on a polishing component, contacting with the surface of an aluminum alloy profile to polish the rough grinding area for the second time, spraying the polishing area in the polishing process, and removing impurities generated by polishing;
S44: detecting the surface of the polished aluminum alloy section by using a charge coupled device, and detecting whether an old paint film remains on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in S44, the polishing is qualified, and the polishing operation is finished;
S46: if an old paint film exists on the surface of the aluminum alloy section in the step S44, the polishing is unqualified, 80-100 mesh sand paper is selected for continuous polishing, and then the step S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps of;
S51: placing a plurality of groups of polished aluminum alloy sections on a flat table top, butting welding seams of the two groups of sections, and adjusting the angles of the welding seams;
S52: clamping and fixing the adjacent welded aluminum alloy sections through a clamp;
S53: measuring welding angles of two groups of aluminum alloy sections fixed on the table top through an angle measuring instrument, and determining whether the welding angles meet welding requirements;
S54: if the measured data of the angle measuring instrument in S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and the worker can use fingers to contact the surface of the metal section to form a certain support, and meanwhile, the rough surface of the weldment can be attached to the skin of the fingers to weld at a uniform speed;
S55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the requirement of the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
The welding slag polishing operation in the step six specifically comprises the following steps of;
s61: polishing a welded area of the welded aluminum alloy section by using a grinder, and enabling the height of the raised welding slag to trend to the surface of the aluminum alloy section;
s62: finely polishing the polished welding area of the grinder by using 800-1000 meshes of sand paper, and enabling the welding area of the aluminum alloy section to form a smooth surface;
s63: measuring the aluminum alloy section after finishing fine grinding by adopting a horizontal measuring instrument, and determining whether the surface of a grinding area is smooth and even;
s64: if the welding slag in the welding area in S63 is kept flat and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is met;
s65: if the welding slag in the welding area in the S63 is not level and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is not met, and the step S62 is repeated.
The aluminum alloy section manufactured by welding is firstly polished by polishing sand paper in the welding operation process, particularly the surface of a welding area is polished, the polishing area is larger than the welding area, the polishing depth is determined by the thickness of the residual old paint film, the surface is ensured to be exposed out of the metal luster, the surface is free of the residual old paint film, the quality of welding connection is improved, the surface of the welding area is provided with anti-skid textures and forming effects, the joint of fingers of workers and a rough surface in the welding process can enable a welding rod and welding equipment to move relatively uniformly and continuously and stably in directions, the anti-skid textures are also sufficient to give feedback to hands when the equipment moves, the welding process is close to uniform speed, the equal welding distance between the welding rod and the aluminum alloy section is kept, and the welding distance is between 2 mm and 4mm, so that a stable welding effect is achieved.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The welding process of the aluminum alloy section bar is characterized by comprising the following steps of:
Step one: selecting an aluminum alloy section capable of being matched with welding, and performing primary water cleaning treatment on the surface of the processed aluminum alloy section to remove adhesion of dust impurities;
Step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% alkaline solution, and corroding at 80-90 ℃ for 4-5min;
Step three: after the corrosion is finished, the aluminum alloy section is put into a 10% nitric acid solution for treatment and washing;
Step four: taking out the washed aluminum alloy section, drying the area to be welded, polishing the dried area, thoroughly removing the old paint film adhered on the surface of the aluminum alloy section, and polishing to roughen the surface of the welded area;
step five: butt-jointing a plurality of groups of polished aluminum alloy section welding seams, clamping and fixing the aluminum alloy section through a clamp, and using welding rods connected through welding equipment to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag to be smooth, and then cooling the welding position;
Step seven: the polished aluminum alloy section surface is subjected to paint spraying treatment, and the surface of a welding area is rough, so that the paint surface is more firmly adhered;
The surface polishing operation in the fourth step specifically comprises the following steps of;
s41: fixing the aluminum alloy section on a polishing tabletop;
S42: the method comprises the steps of roughly brushing off an old paint film on the surface of an aluminum alloy section by using a steel wire brush, removing a large-area old paint film on the surface of the aluminum alloy section, forming a rough grinding area, and then blowing and cleaning the rough grinding area to remove paint film impurities on the surface;
s43: selecting 80-100 mesh sand paper, fixing the sand paper on a polishing component, contacting with the surface of an aluminum alloy profile to polish the rough grinding area for the second time, spraying the polishing area in the polishing process, and removing impurities generated by polishing;
S44: detecting the surface of the polished aluminum alloy section by using a charge coupled device, and detecting whether an old paint film remains on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in S44, the polishing is qualified, and the polishing operation is finished;
S46: if an old paint film exists on the surface of the aluminum alloy section in the step S44, the polishing is unqualified, 80-100 mesh sand paper is selected for continuous polishing, and then the step S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps of;
S51: placing a plurality of groups of polished aluminum alloy sections on a flat table top, butting welding seams of the two groups of sections, and adjusting the angles of the welding seams;
S52: clamping and fixing the adjacent welded aluminum alloy sections through a clamp;
S53: measuring welding angles of two groups of aluminum alloy sections fixed on the table top through an angle measuring instrument, and determining whether the welding angles meet welding requirements;
S54: if the measured data of the angle measuring instrument in S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and the worker can use fingers to contact the surface of the metal section to form a certain support, and meanwhile, the rough surface of the weldment can be attached to the skin of the fingers to weld at a uniform speed;
S55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the requirement of the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
The welding slag polishing operation in the step six specifically comprises the following steps of;
s61: polishing a welded area of the welded aluminum alloy section by using a grinder, and enabling the height of the raised welding slag to trend to the surface of the aluminum alloy section;
s62: finely polishing the polished welding area of the grinder by using 800-1000 meshes of sand paper, and enabling the welding area of the aluminum alloy section to form a smooth surface;
s63: measuring the aluminum alloy section after finishing fine grinding by adopting a horizontal measuring instrument, and determining whether the surface of a grinding area is smooth and even;
s64: if the welding slag in the welding area in S63 is kept flat and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is met;
S65: if the welding slag in the welding area in the S63 is not level and consistent with the surface of the aluminum alloy section, the requirement of slag grinding is not met, and the step S62 is repeated;
polishing the welding area in the fourth step, wherein the polishing depth is determined according to the thickness of the residual old paint film, and the metal luster is ensured to be exposed, so that the surface is free from the residual old paint film;
The roughness of the trend area of the welding rod in the fifth welding process is nearly consistent, so that the welding process is nearly uniform, and the welding distance between the welding rod and the aluminum alloy section is 2-4mm;
wherein the alkaline solution in the second step is any one of sodium hydroxide, dimethylformamide and dichloromethane solution;
And fifthly, forming anti-skid textures on the surface of the polished aluminum alloy section.
2. The welding process of aluminum alloy sections according to claim 1, wherein: in the first step, the selected aluminum alloy section is cleaned, and the welding seam area of the aluminum alloy section can be subjected to shower cleaning through hot water.
3. The welding process of aluminum alloy sections according to claim 1, wherein: and in the step six, the welding position is cooled by adopting air cooling, and the welding area is deslagged and cooled.
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