1、划线要据风管的不同尺寸形状和规格分别进行，同时对一段风管要完整进行，防止划线错孔和下料的多少有误。

1, the drawing line should be carried out according to the different sizes and specifications of the wind pipe, while a section of the wind pipe should be carried out completely to prevent the error of the wrong hole and the material.

2、板材剪切依据划线的阶段不同，分别进行，同时必须进行下料的复核，以免有误。按划线形状用机械剪刀进行剪切。

2, the cutting of plates should be carried out according to the different stages of scribing. At the same time, the blanking should be checked to avoid mistakes. Cut by mechanical scissors according to the shape of the line.

3、剪切时，手严禁伸入机械压板空隙中，上刀架不准放置工具等物品，调整板料时，脚不能放在踏板机上，使用固定式震动剪两手要扶稳钢板，手离刀口不得小于5cm，用力均匀适当。

3, when cutting, the hand is strictly prohibited into the mechanical plate gap, the upper tool holder is not allowed to place tools and other articles. When the plate is adjusted, the foot can not be placed on the pedal machine, and the fixed type vibration shears should be used to support the stable steel plate. The hand should not be less than 5cm, and the force is even and appropriate.

4、板材下料后在轧口之前，必须用倒角机或剪刀进行倒角工作。

4. After the cutting is done, the chamfering machine or scissors must be used for chamfering.

5、金属薄钢板制作的风管用咬口连接、铆钉连接、焊接等不同方法。

5. Different ways to connect the wind pipe with metal sheet, such as bite connection, rivet connection and welding.

6、咬口宽度和留量要根据板材厚度而定。

6, bite width and allowance should be determined according to the thickness of the sheet.

7、焊接时必须焊缝均匀，无裂纹及加渣现象，铆钉连接时，铆钉中心先垂直于面板，铆钉头把板材压紧，使板材密合并排列整齐、均匀。板材之间铆接，一般中间不可以加垫料，设计规定时，遵循设计。

7, the weld must be welded evenly, without cracks and slag adding. When the rivet is connected, the rivet center is first perpendicular to the panel, and the rivet head is pressed tightly to make the sheet in neat and uniform. The riveting between plates should not be filled in the middle.

8、咬口时手指据滚轮护壳不小于50mm，手不准放在咬口机管道上扶稳板料。

8. When fingers bite, fingers are not less than 50mm, and the hands are not allowed to be placed on the pipe of the bite machine to stabilize the sheet.

9、咬口后的板料将画好的折方线放在折方机上，置于下模的中心线，操作时，使机械上刀片与下模中心线重合，折成所需的角度。

9, the plate after the bite is placed on the folding machine and placed on the center line of the lower die. In the operation, the blade of the machine is overlapped with the center line of the lower die and is folded into the desired angle.

10、折方时应相互配合并与折方机保持一定距离，以免被翻转的钢板或配件碰伤。

10. When folded, it should be matched with the folding machine to maintain a certain distance, so as not to be injured by overturned steel plates or fittings.

11、制作员风管时，将咬口两端拍成圆弧状放在卷圆机上卷圆。按风管直径规格适当调整上、下辊间距，操作时，手不得直接推送钢板。

11. When making the wind pipe, the producers will circle the ends of the biting ends and put them on the winding machine. Adjust the distance between the upper and lower rollers according to the diameter of the duct. When you operate, you must not push the steel plate directly.

12、折方或卷圆后的钢板用合口机或手工进行缝合。操作时，用力均匀，不易过重。单、双口确定咬合，无脏裂或半咬口现象。

12. Folded or round rolled steel plates should be stitched with a machine or hand. In operation, the force is uniform and not easy to overweigh. Single and double ports confirm bite, no dirty or half bite.