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图1所示的卷边型钢(Ⅰ型龙骨)属于薄壁型钢,在建筑工程中应用广泛。轧制成形的Ⅰ型卷边型钢可根据需要制成一定长度,冷弯成形的Ⅰ型卷边型钢一般需要通过焊接接成一定长度,然后运往施工现场。 图2是一种典型的接长焊接的接口形式。采用手工电弧焊进行这种接口形式焊接的最大问题是焊后易产生凹向开日一侧的弯
The curling steel (Ⅰ keel) shown in Fig.1 belongs to the thin-walled section steel and is widely used in the construction. The rolled type Ⅰ curl-type steel can be made to a certain length according to the need. The cold-formed type Ⅰ curl-type steel generally needs to be welded to form a certain length, and then transported to the construction site. Figure 2 is a typical long form of the interface. The use of manual arc welding in the form of this interface welding the biggest problem is easy to produce after welding concave to the side of the open side of the bend