摘要
割嘴是火焰切割机的关键部件,为提高火焰切割机的切割性能,提出将割嘴氧气通道孔内壁孔设计成拉瓦尔管形状,对氧气通道孔进行热力学分析,进行拉瓦尔管通道结构分析与参数计算,得到可行的拉瓦尔通道简化设计方案。采用"数控车削结合电铸"及"数控车削结合电火花加工"方案,实现两种割嘴拉瓦尔通道的加工成形。对三种割嘴进行钢板切割比较试验,结果表明,内壁拉瓦尔通道结构可增加切割氧气的流速、流量,改善氧流形状,能有效提高火焰切割机的切割性能。
Cutting nozzle is a key part of the flame cutting machine, in order to improve the performance of the flame cutting machine cutting, put forward the processing scheme that the cutting nozzle＇s oxygen pas- sage hole wall being designed into the shape of Laval nozzle, carry out a thermodynamic analysis about the oxygen passage hole, analyze and calculate the channel structure of Laval tube, so obtain a design alternative which can simplify Laval tube channel. There are two processing program that ＂ CNC turning binding electroforming ＂ and ＂ CNC turning combined with micro EDM ＂ , realizing the forming process of two kinds of cutting nozzles inner wall Laval channel. Do comparative tests of three kinds of cutting nozzles cutting steel plate, the results show that the structure of Laval tube channel can increase the flow velocity and rate of oxygen, improve the shape of oxygen flow, and can effectively improve the cutting performance of flame cutting machine.
出处
《制造技术与机床》
北大核心
2016年第6期77-82,共6页
Manufacturing Technology & Machine Tool
关键词
割嘴
拉瓦尔管
放电加工
电铸
切割试验
cutting nozzle
laval tube
electro - discharge machining
electroforming
cutting test
