济南通风管道加工是通风和空气调节体系的重要组成部分，大部分都是由管道加工设备制成。可是由于各种各样的原因，可能导致管道加工设备加工而成的通风管道呈现问题。
Jinan ventilation pipe processing is an important part of ventilation and air conditioning system, most of which are made of pipe processing equipment. However, due to various reasons, it may lead to problems in the ventilation pipe processed by the pipe processing equipment.
①表现：板材外表不平整，厚度不均匀，有显着的压痕、裂纹、砂眼和锈蚀等情况;通风管道平面下沉，旁边面向外凸起，有显着的变形。
① Performance: the surface of the plate is uneven, the thickness is uneven, and there are significant indentation, crack, sand hole and corrosion; The plane of the ventilation duct sinks, and the side faces outward, with significant deformation.
②影响：工作时通风管道漏风，空调负荷添加，同时风寿命和性能被影响。
② Impact: when working, the ventilation duct leaks, the air conditioning load is added, and the air service life and performance are affected.
③原因：资料不合格，不能满意制造通风管道的需求。
③ Cause: the data are unqualified and can not meet the needs of manufacturing ventilation pipes.
④办法：在使用通风管道加工设备制造通风管道前，要先查看资料出厂合格证书和资料质量证明还有外观厚度等，确保资料是可用的。
④ Method: before using the ventilation pipe processing equipment to manufacture the ventilation pipe, check the data, factory certificate, data quality certificate and appearance thickness to ensure that the data are available.
在应用前人们应当按时除去排烟风机里边的尘士，特別是离心叶轮上的尘士、误点等残渣，以预妨生锈和失调。另一个还要尽量减少机器设备将会出現的一些常见故障，比如电级电流量很大或是温度太高，滚动轴承箱猛烈超越这些，搞好预防工作中。
Before application, people should remove the dust inside the smoke exhaust fan on time, especially the dust on the centrifugal impeller, delay and other residues, so as to prevent rust and imbalance. On the other hand, try to reduce some common faults of machinery and equipment, such as large electric current or too high temperature, and violent exceeding of rolling bearing housing, so as to do a good job in prevention.
通风管道展开步骤基本上可以分为熟悉图形，形体分析，求直线的实长或平面的实形，确定展开方法和画展开图这几个部分。在进行展开下料前，要熟悉施工图纸，这是一项准备工作，主要是对将要展开的关键和部件有所了解，如管道在图纸上的尺寸大小、制作材料等。而对于比较复杂的管件，则需要对施工图纸进行反复阅读和分析，针对有关问题要及时提出和解决。由于通风管件及其部件在图纸上都是几何图形，而对形体进行分析的主要目的就是将复杂的几何图形简单化。通过分析，以便找到恰当的展开方法。
The unfolding steps of ventilation duct can be basically divided into familiar graphics, shape analysis, finding the real length of straight line or the real shape of plane, determining the unfolding method and drawing the unfolding diagram. Before launching and blanking, first be familiar with the construction drawings, which is a preparatory work, mainly to understand the key and components to be launched, such as the size of the pipeline on the drawings, manufacturing materials, etc. For more complex pipe fittings, it is necessary to repeatedly read and analyze the construction drawings, and timely put forward and solve relevant problems. Because the ventilation pipe fittings and their components are geometric figures on the drawing, the main purpose of shape analysis is to simplify the complex geometric figures. Through analysis, in order to find the appropriate expansion method.
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