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Insufficient stiffness of rectangular air duct machine with

1. Phenomena
 
The large side of the duct machine sinks to varying degrees, and the two sides (small side) protrude slightly outward, with obvious deformation. When the system works, the duct appearance trembles and produces noise.
 
2. Cause analysis
 
(1) The thickness of aluminium sheet for air duct manufacturing does not meet the planning requirements.
 
(2) The way of biting does not meet the standard requirements.
 
3. Prevention and control measures
 
(1) Aluminum sheets for air ducts should be made of pure aluminium or annealed aluminium sheets if planning is not required.
 
(2) According to the regulations, bite joints are optional for air ducts and fittings whose wall thickness is less than or equal to 1.5mm, and oxygen-acetylene or argon arc welding is optional for air ducts and fittings whose wall thickness is greater than 1.5mm. In order to ensure the stiffness of air duct, corner bite, joint corner bite and button bite can be selected when rectangular air duct or fittings are connected by bite.
Jiangsu Sanzheng Machinery Technology Co., Ltd.

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18936959803