Special steel pipe for CO2 (carbon dioxide) air conditioner compressor casing and processing process of special steel pipe

Abstract

The invention relates to a special steel pipe for a CO2 (carbon dioxide) air conditioner compressor casing and a processing process of the special steel pipe. The processing method comprises the following process steps that steel coils are sheared into required steel belts according to specifications; the steel belts are subjected to leveling through a leveling machine after entering a machine unit production line, the smoothness is +/-0.30mm, and the two sides of the steel belts are respectively subjected to 60-degree planing and shaping; the welding current is regulated, and the current is controlled to be between 550A and 650A; the welding speed is controlled to be 30meter/minute to 35meter/minute; a heat affecting region is lengthened, and a welding opening angle is enlarged; the steel belts are formed into steel pipes by adopting a multi-roller extruding device; welding seams are formed at the welding points; the steel pipes are naturally cooled through air and are cooled through water after the welding, the steel pipes enter a correcting region, the roundness of the special steel pipes can be ensured, and the appearance dimension requirements are met. The special steel pipe and the processing process have the advantages that the roundness of the welding steel pipe casing and the tightness of the welding seams can be ensured, the welding seams can bear the maximum intensity pressure greater than or equal to 30Mpa, the production process is simple, the productivity can be improved, the manufacturing finished product rate is high, raw materials can be saved, the appearance is smooth and attractive, the quality can be improved, and the cost can also be reduced.

Description

technical field [0001] The present invention relates to a CO 2 Special steel pipes for the main shell of refrigeration and air-conditioning compressors and their processing technology, specifically CO2 for household and commercial air-conditioning 2 Special steel pipes for refrigerant air conditioner compressors. Background technique [0002] In the prior art, the refrigerant used in the air conditioner compressor is R 12 —R 22 In September 2007, the International Air Conditioning Conference promulgated the "Montreal Protocol" to phase out the toxic and harmful refrigerant R used in the past within a time limit. 12 —R 22 . [0003] CO 2 As a natural and environmentally friendly optimized refrigerant, CO 2 It is non-toxic and harmless, and has zero potential to damage the ozone layer. It is the best refrigerant recognized by the international air-conditioning industry. [0004] However, for the air-conditioning compressor shell, it brings higher quality requirements...

AI Technical Summary

Problems solved by technology

[0007] ① Deep drawing, but it is difficult to make the thickening of the plate and the increase of the height of the shell;

[0008] ② The material is rolled into a single cylinder and then welded, but it is very difficult to bend and roll a thick plate into a cylinder, and the welding slag in the welding seam is difficult to clean;

[0009] ③Using seamless steel pipes for turning and forming is expensive and time-consuming, and cannot meet mass production

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