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Welding method of stainless steel rectangular air pipe

A welding method, stainless steel technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as difficulty in guaranteeing process quality, low labor efficiency, and inability to guarantee quality, so as to save labor costs, improve labor efficiency, and save The effect of raw materials

Inactive Publication Date: 2013-02-13
DALIAN ZHONGYING ENERGY MANAGEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The material cost of the stainless steel flange connection process is high. A section of the air duct needs three pieces of angle steel flanges. The gasket needs to be oil-resistant and impermeable. All longitudinal seams must be sealed with glue; the quality of the process is difficult to guarantee. And the longitudinal seam of the air duct often leaks oil, and the space for applying sealant to the longitudinal seam of the air duct with small cross-section is limited, and its quality cannot be guaranteed; the combined sealing machine for making the air duct is easy to damage, the hardness of stainless steel is high, and the gear of the combined sealing machine is overstressed Large, the service life is greatly reduced, and the air duct with a thickness of more than 1.0mm can not be produced by a combined bite machine; the labor efficiency is low, and the production labor cost is 30% higher than that of ordinary galvanized steel sheets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] According to the specifications of the air duct, it is preferred to divide the stainless steel plate with a width of 1250mm into two pieces for cutting. According to the flanging size of 15mm, first fold the required flanging of the horizontal welding part of the air duct on the folding machine; the air duct reinforcement frame is used The stainless steel angle steel is welded by electric welding according to the specification and size of the air duct.

[0011] Assemble the two stainless steel plates after laying the material, put the reinforced frame that has been made on the assembled air duct before welding, fix it with clamps, and perform longitudinal welding of the air duct in the form of fillet welding , in order to heat and cool the weld seam of the air pipe evenly and reduce deformation, welding is performed in reverse from the middle to both ends during welding; when assembling, spot weld the air pipe first, fix it with a clamp before welding, welding The high ...

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Abstract

The invention relates to a welding method of a stainless steel rectangular air pipe and belongs to the technical field of air exhaust, dust removal and oil-smoke exhaust pipelines. The welding method comprises the following steps: sleeving assembled two stainless steel plates by using a manufactured reinforcing frame, fixing by using a fixture and carrying out longitudinal argon arc welding; putting the two sections of formed stainless steel air pipe on a fixture table, fixing the stainless steel air pipe by using the fixture and then carrying out transverse argon arc welding; and finally pickling, passivating and cleaning. The welding method has the beneficial effects that no oil leakage exists, the labor efficiency and the quality are improved, and the labor cost and the raw materials are saved.

Description

Technical field: [0001] The invention relates to a welding method for a stainless steel rectangular air pipe, and belongs to the technical field of air exhaust, dust removal, and oil fume exhaust pipes. Background technique: [0002] The material cost of the stainless steel flange connection process is high. A section of the air duct needs three pieces of angle steel flanges. The gasket needs to be oil-resistant and impermeable. All longitudinal seams must be sealed with glue; the quality of the process is difficult to guarantee. And the longitudinal seam of the air duct often leaks oil, and the space for applying sealant to the longitudinal seam of the air duct with small cross-section is limited, and its quality cannot be guaranteed; the combined sealing machine for making the air duct is easy to damage, the hardness of stainless steel is high, and the gear of the combined sealing machine is overstressed Large, the service life is greatly reduced, and the air duct with a t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/235
Inventor 不公告发明人
Owner DALIAN ZHONGYING ENERGY MANAGEMENT
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