start-up tabs/high-frequency 怎讲(焊接)? starts / stops : by either start-up tabs or by high-frequency starting. scratch starting is not permitted. starts and stops shall be staggered as much as possible on successive weld passes. all craters shall be ground with a metal burring tool before the next pass of weld metal is deposited. 启 /停点 :采用引弧板或高频引弧。不允许采用擦伤引弧的方式 。对于连续焊道, 启/停点 要尽量错开。 所有弧坑在 都应用金属锉子进行打磨。 starting weld tab引弧板---为在焊缝始端获得正常尺寸的焊缝截面,焊前装配的一块金属板,焊接在这块板上开始,焊后割掉。 对scrach starting的翻译没有把握,意思明白,但中文没听说过 查看更多