碳弧气刨工艺carbon arc air gouging procedure.docVIP

Contents 目录 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 本in the gouging should be trained professionally 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 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 fracture easily. The section face is fine. Carbon electrodes copperized are often used actually 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 with good electrical conductivity is required, and compressed air spraying from it shall be concentrated. Carbon electrodes can be clamped firmly and replaced easily. Its shell shall be insulated. It can be used facilely. 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 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 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: 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 180-280 A 300-400 A 350-400 A For round carbon electrodes, gouging current may be confirmed as per the following empirical formula, I=(30～50)D 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）