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弯管的弯曲一般采用冷弯的方法

发布时间:2020-07-10   来源:www.hbwanguan.com
 

弯管的弯曲一般采用冷弯的方法,在工厂缺少冷弯设各的情况下,允许采用热弯,但水煤气管不六采用热弯,20号钢管不宜采用中频弯曲。
不锈钢管及合金钢管宜冷弯,如必须热弯时,不锈钢管加热应避免渗碳,而对淬硬倾向较大的合金钢管则不得浇水冷却。紫铜管冷弯前应采取局部退火处理。
frpp管材弯管弯曲半径,一般不小于3倍弯管通径,在管路布置比较紧凑的地方,在保证弯管质量前提下,允许小于3倍弯管外径,较小弯曲半径的弯管,应采用定型弯头。
弯管操作者,应熟悉弯管设各的结构、性能及其操作程序和规则。
对有芯弯管机,弯管内径与塞芯工作部分,应涂适量的润滑油。
对有芯弯管机,弯管时芯棒的端头圆柱截而位置应超过与其垂直的模具中心线,其超前值一般根据试验来决定,新安装和调试的弯管机可参照选取。

 

The bending of the bending pipe usually adopts the cold bending method. In the case of lack of cold bending in the factory, it is allowed to use hot bending, but the water gas pipe is not six hot bending, and No. 20 steel pipe should not be used in medium frequency bending.
Stainless steel tube and alloy steel pipe should be cold-formed. If hot bending must be made, stainless steel tube should be heated to avoid carburizing, and the alloy steel pipe with greater hardened tendency should not be cooled by water. The local annealing treatment should be taken before the copper tube is cold bending.
FRPP pipe bending radius, generally not less than 3 times the diameter of the bend pipe, in the pipeline layout is more compact, under the guarantee of the quality of the pipe quality premise, allow less than 3 times the outer diameter of the bend, the smaller bending radius of the bend, should adopt the shape of the bend.
The elbow operator should be familiar with the structure, performance and operation procedures and rules of the elbow.
For the core bender, the inner diameter of the elbow and the working part of the plug should be properly coated with lubricating oil.
For the core bending machine, the end cylinder of the mandrel should be cut over the center line of the mold at the end of the mandrel. The preceding value is generally determined according to the test. The newly installed and debugged bender can be selected as a reference

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