专注通风管道加工·排烟罩

技能模块工艺要求：

Skill module process requirements:

1、风管法兰加工采用模具法加工，同一型号的法兰采用一个模具，以保证法兰的互换性和尺寸精度；

1. The flange of the air duct is processed using the mold method, and the same model of flange is processed using the same mold to ensure the interchangeability and dimensional accuracy of the flange;

2、下料调直后应倒角、冲孔，然后放在相应的模具上卡紧固定、焊接。

2. After straightening the material, it should be chamfered and punched, and then placed on the corresponding mold for clamping and welding.

3、法兰平面度的允许偏差为1mm，矩形法兰两对角线之差不应大于2mm；

3. The allowable deviation for flange flatness is 1mm, and the difference between the two diagonals of a rectangular flange should not exceed 2mm;

4、法兰四角必须有螺孔，中、低压系统风管法兰的螺栓及铆钉孔的孔距不应大于150mm；高压系统不得大于100mm；

4. The four corners of the flange must have screw holes, and the distance between the bolt and rivet holes of the medium and low pressure system air duct flange should not exceed 150mm; The high-pressure system shall not exceed 100mm;

5、法兰成形后要对法兰进行矫直，并将焊渣清理干净后对焊接部位刷防锈漆二道，银粉漆一道。

5. After the flange is formed, it should be straightened, and the welding slag should be cleaned before applying two layers of anti rust paint and one layer of silver powder paint to the welding area.

质量控制要点：

Key points of quality control:

1、法兰角钢下料时应注意使焊成后的法兰内径不能小于风管的外径；

1. When cutting flange angle steel, attention should be paid to ensuring that the inner diameter of the welded flange is not less than the outer diameter of the air duct;

2、风管法兰的焊缝应熔合良好、饱满，无假焊和孔洞；

2. The welding seam of the air duct flange should be well fused, full, and free of false welding and holes;

3、同一批量加工的相同规格法兰的螺孔排列应一致，并具有互换性；

3. The arrangement of screw holes for flanges of the same specification processed in the same batch should be consistent and have interchangeability;

4、风管法兰防腐处理时，应在上一道漆晾干后方可进行下一道防腐处理；

4. When anti-corrosion treatment is applied to air duct flanges, the next anti-corrosion treatment can only be carried out after the previous coat of paint has dried;

5、严禁无证人员上岗施焊；

5. Unauthorized personnel are strictly prohibited from welding on duty;

成品保护措施：

Finished product protection measures:

1、风管法兰半成品、成品必须整齐放置在方木上，并应根据规格型号分类码放；

1. The semi-finished and finished products of air duct flanges must be neatly placed on square timber and classified and stacked according to their specifications and models;

2、不与其它材料，设备等混放在一起，并有防雨、雪措施；

2. Not mixed with other materials, equipment, etc., and equipped with rain and snow protection measures;

3、成品风管法兰长时间堆放时应用塑料薄膜覆盖，保持表面洁净，避免积灰；

3. When finished air duct flanges are stacked for a long time, they should be covered with plastic film to keep the surface clean and avoid dust accumulation;

4、搬运装卸应轻拿轻放，不得破坏法兰镀锌层，如有划伤应补漆完整。

4. Handling and loading/unloading should be done with care, and the flange galvanized layer should not be damaged. If there are scratches, they should be repainted intact.

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