碳弧气刨工艺carbon arc air gouging procedure
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In formula, I: current(A) D: diameter of carbon electrode(mm)
对于圆碳棒,碳刨电流也可根据以下经验公式进行选择
I=(30~50)D
式中I:电流(A)D:碳棒直径(mm)
4.2When removing welding defect, that lower current is recommended in order to decrease gouging rate and thickness for finding defect.
ASME Sec. IX现行版本,焊接工艺、焊工和焊接操作者评定标准
D.PR.32 Welding
D.PR.32焊接
CB/Z 67-73 Technical Conditions of using carbon arc air gouging
CB/Z 67-73碳弧气刨使用技术条件
2. General
对压缩空气的要求
Steady pressure and enough air volume that pressure value is 0.4MPa-0.6MPa. Compressed air shall not contain moisture content so much that the moisture causes gouging quality badly
耐高温,导电性能好,不易断裂,断面组成细致。一般采用镀铜实心碳棒。
3.2 Requirements of holder
对碳弧气刨手把的要求
The Holder withgood electricalconductivityisrequired,and compressed airspraying from it shall beconcentrated. Carbon electrodescanbe clamped firmlyand replaced easily. Its shellshall beinsulated.It can beusedfacilely.
碳刨可应用于焊缝背部清根,去除焊缝缺陷,削斜。
3. MATERIAL AND EQUIPMENT
材料和设备
3.1 Requirements of carbon electrode
碳棒要求
Carbon electrode should be with high temperature resistance and electrical conductivity, and is not to fractureeasily.The section face is fine. Carbon electrodescopperized are often used actually
导电性良好,压缩空气吹出来集中,碳棒夹持牢靠,更换方便,外壳绝缘好,灵巧,使用方便等。
3.3 Power Source
电源
Direct Current Electrode Positive (DCEP) is usually adopted.
一般采用直流反接法。
3.4 Requirements of compressed air
综述
All performances of carbon arc air gouging shall comply with the requirements of this procedure in any case.
无论何时碳刨操作都应遵照本工艺的要求。
All personal engagedin thegouging should be trained professionally
压力稳定,风量大。应达到0.4MPa-0.6MPa的压力,不应有影响刨槽质量的明显水分。
4. PROCEDURE
工艺
4.1 Gouging to be performed at the dockyard or at the workshop by manual process with round or rectangle carbon electrodes, should follow below parameters:
本程序规定了碳弧气刨的要求。
1. REFERENCE
参考资料
AWS D1.1 Current version, Structural Welding Code-Steel
AWS D1.1现行版本,钢结构焊接规范
ASME Sec. IX Current Version, Qualification standard for welding procedures, welders and welding operators
碳刨应按照下述方法进行:
在船坞内或车间内手工使用圆形或矩形碳棒进行,电流参数如下:
Carbon electrode size
碳棒规格
φ6
φ8
5x18
Amps. Range
电流范围பைடு நூலகம்
180-280 A
300-400 A
350-400 A
For round carbon electrodes, gouging current may be confirmed as per the following empirical formula,
所有从事碳刨的人员应进行专业培训。
The gouging may be adopted to remove the weld root from the back side, or to remove defects discovered in welds, or bevel the metals sometimes
Contents
0.Scope适用范围3
1.REFERENCE DOCUMENTS参考资料3
2.GENERAL综述3
3. MATERIAL AND EQUIPMENT材料和设备3
4. PROCEDURE工艺4
0. SCOPE
适用范围
This procedure is to define the requirements of carbon arc air gouging