Chang Jie LPG tank truck / aluminum alloy tank truck / semi-trailerwelding and inspection process points:
1, before welding with chemical or mechanical methods, strictly clean the weld groove on both sides of the surface oxide film:
A, chemical cleaning is the use of alkali and acid cleaning the surface of the workpiece, the law can remove the oxide film, but also in addition to oil, the specific process is
as follows:
The volume fraction of 6% -10% sodium hydroxide solution, at 70 ℃ soak 0.5 min → washing → volume fraction of 15% nitric acid at room temperature soak 1 min for
neutralization → washing → warm water washing → drying. After washing the aluminum surface for the dull silver-white.
B, mechanical cleaning can be pneumatic or electric milling cutter, you can also use scraper, rasp and other tools. For thinner oxide film can also be used 0.25mm copper wire
brush to remove the oxide film.
C, clean up the best immediately after welding, if the park for more than 4h, should be re-cleaned.
D, for wire cleaning is more important, the supply of welding wire state should be clean and bright wire by wire processing, usually sealed with plastic bags, should be used as
soon as possible after the Kaifeng. Otherwise the contamination of the wire is difficult to reuse.
2, the assembly should be firmly fixed welding: welding plate workpiece, in order to reduce the deformation, should take preheating measures, generally should be welded in the
fixture.
3, the welders to undergo a rigorous operation skills training, master of aluminum MIG welding and TIG welding technology.
4, visual inspection after welding: according to TB / 1580 JB / T7949
5, X-ray: According to GB / T2245
6, mechanical properties test: tensile test by GB / T168650 bending test by GB / T14452
7, all the joints were X-ray film to achieve Ⅰ grade Ⅱ-chip.
8, aluminum alloy tanker / aluminum tanker / aluminum alloy semi-trailer welded joint strength.
8.1, 5083 is a non-heat-treated aluminum alloy, after welding a lower degree of softening.
Heat treatment strengthened aluminum alloy after welding joint strength of the softening degree of more serious, the strength of raw materials only about 70%.
8.3, welding heat affected zone (HAZ) is the weak link joints.
Hubei Changjie Special Purpose Vehicle Co. Ltd
Contact Name: Mr. Suan Yin
E-mail: cj802@urspv.com
Mobile phone: +8613886881673
Tel: +(00)867223229933
1, before welding with chemical or mechanical methods, strictly clean the weld groove on both sides of the surface oxide film:
A, chemical cleaning is the use of alkali and acid cleaning the surface of the workpiece, the law can remove the oxide film, but also in addition to oil, the specific process is
as follows:
The volume fraction of 6% -10% sodium hydroxide solution, at 70 ℃ soak 0.5 min → washing → volume fraction of 15% nitric acid at room temperature soak 1 min for
neutralization → washing → warm water washing → drying. After washing the aluminum surface for the dull silver-white.
B, mechanical cleaning can be pneumatic or electric milling cutter, you can also use scraper, rasp and other tools. For thinner oxide film can also be used 0.25mm copper wire
brush to remove the oxide film.
C, clean up the best immediately after welding, if the park for more than 4h, should be re-cleaned.
D, for wire cleaning is more important, the supply of welding wire state should be clean and bright wire by wire processing, usually sealed with plastic bags, should be used as
soon as possible after the Kaifeng. Otherwise the contamination of the wire is difficult to reuse.
2, the assembly should be firmly fixed welding: welding plate workpiece, in order to reduce the deformation, should take preheating measures, generally should be welded in the
fixture.
3, the welders to undergo a rigorous operation skills training, master of aluminum MIG welding and TIG welding technology.
4, visual inspection after welding: according to TB / 1580 JB / T7949
5, X-ray: According to GB / T2245
6, mechanical properties test: tensile test by GB / T168650 bending test by GB / T14452
7, all the joints were X-ray film to achieve Ⅰ grade Ⅱ-chip.
8, aluminum alloy tanker / aluminum tanker / aluminum alloy semi-trailer welded joint strength.
8.1, 5083 is a non-heat-treated aluminum alloy, after welding a lower degree of softening.
Heat treatment strengthened aluminum alloy after welding joint strength of the softening degree of more serious, the strength of raw materials only about 70%.
8.3, welding heat affected zone (HAZ) is the weak link joints.
Hubei Changjie Special Purpose Vehicle Co. Ltd
Contact Name: Mr. Suan Yin
E-mail: cj802@urspv.com
Mobile phone: +8613886881673
Tel: +(00)867223229933
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