通风管道生产线设备冲口模具及剪板刀不能动作，可能是电气箱控制液压电磁阀的连接线断线，可能是电气箱中间继电器损坏，触摸屏自动加工页面显示为不冲口状态或电磁阀卡滞。处理：检查机器的电气线路或设备是否损坏，及时更换修理。

The punching mold and cutting blade of the ventilation duct production line equipment cannot move, which may be due to a broken connection line of the hydraulic solenoid valve controlled by the electrical box, a damaged relay in the middle of the electrical box, a touch screen automatic processing page showing no punching status, or a stuck solenoid valve. Handling: Check if the electrical circuits or equipment of the machine are damaged, and replace and repair them in a timely manner.

通风管道翘角及弯头角度不准：矩形框通风管道两相对性平面、两边面不平行;折角不竖直;直线不相同;咬口不紧。危害：会使风管连接受力不均匀，安装后的风管不平直，法兰盘垫片不严密，系统漏风，造成空调负荷损失，并且缩短使用寿命。

The deflection angle and bend angle of the ventilation duct are not accurate: the two opposite planes of the rectangular frame ventilation duct and the two sides are not parallel; The folding angle is not vertical; Different straight lines; The bite is not tight. Harm: It can cause uneven stress on the air duct connection, uneven installation of the air duct, loose flange gasket, system air leakage, resulting in air conditioning load loss and shortened service life.

通风管道原材料不合格：板才表面不整平，薄厚不匀称，有显著的压印、裂缝、沙孔、结痂和生锈等状况;通风管道平面下沉，侧边向外突起，有显著的形变。危害：运行时风管漏风，中央空调负载提升，另外风管使用寿命和特性被危害。

Unqualified raw materials for ventilation ducts: The surface of the board is uneven, the thickness is uneven, and there are significant imprints, cracks, sand holes, scabs, and rust; The ventilation duct sinks flat and protrudes outward on the side, showing significant deformation. Harm: Air duct leakage during operation, increased load on central air conditioning, and compromised service life and characteristics of the duct.