摘  要:火焰切割机是利用各种可燃气体和氧气的燃烧来切割钢坯的。火焰切割机的主要特点是:投资费用比较少，切割设备的外形也较小，切缝较平整，并不受铸坯温度和断面大小的影响，特别是大断面的铸坯，其优越性更明显，但切割时间较长，切缝又宽，切口处的金属损耗严重，污染也严重。

　　火焰切割机通常由切割机构、同步机构、返回机构、断面检测器、定尺机构及氧、乙炔管路系统等部分组成。切割机构是火焰切割机的关键部分，它主要由切割枪和传动机构组成。同步机构是指使切割小车与连铸坯同步运行的机构。切割小车是在与铸坯无相对运动的的条件下切割钢坯的。返回机构是指采用普通小车运行机构。定尺机构是由气缸推动测量辊，使之顶在铸坯的下面，靠摩擦力使之转动，触发脉冲器发出脉冲信号。

关键词：火焰切割机 切割机构 同步机构 返回机构 定尺机构

Abstract:Flame cutting machine is to use a variety of the combustion of combustible gas and oxygen to cut billet. The main characteristics of the flame cutting machine is: low investment cost, cutting equipment of small shape, kerf smooth, is not affected by the billet temperature and section size, especially for large section casting, its superiority is obvious, but the cutting time is longer, the slit is wide, the loss of metal incision is serious, also serious pollution.

    The cutting mechanism is a key part of the flame cutting device. It is mainly composed of a gun and gear cutting. A synchronization mechanism refers to the cutting trolley and continuous casting slab synchronization operation mechanism. Cutting the trolley and slab without relative motion conditions cutting billet. The return mechanism refers to the use of ordinary car movement organization. The positioning mechanism is driven by the cylinder measuring roll, so that the top below the billet, friction on the rotating the. Using pulse emitted pulse signal.

Keywords: flame cutting machine; cutting mechanism; mechanism of synchronization;  mechanism of return ;  sizing mechanism.