烟囱用钛/钢复合板坡口机加工艺的改进

Improvement of Machining Technology for Groove of Titanium/Steel Clad Plate for Chimney

摘要:

利用铣边机、刨边机等传统方法对2/6 mm×2 500 mm×6 900 mm钛/钢复合板进行坡口加工，无法满足“直边且刻槽宽度5 mm，边部超声波探伤（UT）检验符合ASTM A578-07 C级”的技术要求。为此，分析了复合板机加工分层的原因，并改用激光切割和圆盘锯切的方法，通过优化激光功率、峰值功率、脉冲频率、辅助气体、进给速度、圆盘锯转速等参数，有效解决了钛/钢复合板坡口机加中出现的边部分层、钛层撕裂等问题，产品经过UT检验满足客户要求。

Abstract:

Bevel processing on 2/6 mm×2 500 mm×6 900 mm titanium/steel clad plate by milling machine, edge planing machine and other traditional methods cannot meet the specification requirement “straight edge, groove width 5 mm, edge UT conform to ASTM A578-07 Class C”. So the reason of clad plate lamination by machining was analyzed，and the traditional methods were instead by laser cutting and circular saw cutting. By optimizing the laser power, peak power, pulse frequency, auxiliary gas, speed of feed, rotational speed of circular saw and other parameters, the problems of edge lamination, titanium layer separation and so on which discovered in bevel processing on titanium/steel clad plate were solved. The products can meet the customer requirements through UT inspection.