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Phone:18936288096 / 18936287016

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Address:No. 889, Fandi Branch Road, Jianhu Economic Development Zone, Jiangsu Province

How to prevent heat treatment deformation in the third production line of air duct

2020-12-31 12:19:33
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How to prevent heat treatment deformation in the third production line of air duct
1. Reasonable material selection. For the third production line of spiral air duct, micro deformation die steel with good material (such as air cooling steel) shall be selected. For the third production line of air duct with serious carbide segregation, reasonable forging and quenching and tempering heat treatment shall be carried out, and solid solution double refinement heat treatment can be carried out for large and unable to forge die steel.
2. The structural design of the third line of air duct production shall be reasonable, the thickness shall not be too different, and the shape shall be symmetrical. For molds with large deformation, the deformation law shall be mastered, and the machining allowance shall be reserved. For large and complex molds, the combined structure can be adopted.
3. On the premise of ensuring the hardness of the die, precooling, staged cooling quenching or warm quenching process shall be adopted as far as possible.
4. For the third production line of air duct, if conditions permit, vacuum heating quenching and cryogenic treatment after quenching shall be adopted as far as possible.
5. Complex dies should be pre heat treated to eliminate the residual stress produced in the machining process.
6. For some air duct production lines, pre heat treatment, aging heat treatment and quenching, tempering and nitriding heat treatment can be used to control the accuracy of the die.
7. When repairing sand holes, air holes, wear and other defects of the third line of air duct production, repair equipment with small thermal impact such as cold welding machine shall be selected to avoid deformation in the repair process.
The air duct production line is a complete production system. Only when all parts are stable can the whole air duct processing process be completed.
The ventilation duct we usually contact is the primary part of the ventilation and air conditioning system, and most of them are made by the air duct production line. However, due to various factors, the air duct processed by the air duct production line will have problems.
Two opposite planes and two end faces of rectangular air duct are not parallel; The corner is not straight; Diagonals are not equal; The bite is not tight. It will lead to uneven acceptance force of air duct, uneven air duct behind the equipment, loose flange gasket, air leakage of the system, loss of air conditioning load and shortening the service life. The air ducts are parallel, and the sheet length and width of the opposite surface are not equal.   
In addition to being made of sound-absorbing materials, the pipe wall also contains centrifugal fiberglass board, which has low thermal conductivity. Its appearance has a kind of composite aluminum foil cloth, which has strong heat reflection and good thermal insulation performance. Better than ordinary air duct.

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Mobile phone:18936288096/18936287016

Telephone:0515-8625-5692 

Mailbox:spiral▁duct@ycsbjx.com           

                hvac@ycsbjx.com 

Address: No. 889, Fandi Branch Road, Jianhu Economic Development Zone, Jiangsu Province

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