药芯焊丝生产装备特性及其与焊丝品质的相关性

Characteristics of production equipment for flux-cored wire and its correlation with wire quality

介绍了钢带法药芯焊丝生产工艺流程及所需装备,探讨了主要生产装备的结构特点、工作原理及与焊丝品质的相关性。研究表明,钢带轧拔法药芯焊丝制造工艺比较复杂,所需装备或装置种类较多,结构特点和工作原理各异。加粉的不均匀性、粉料的分层现象,以及粉料的流动性差异等,是加粉装置运行中影响焊丝品质的主要因素。对接截面药芯焊丝在成型过程中出现桃形、接口不严,以及药粉填充率不稳定、可调性差等现象,是成形装置运行中影响焊丝品质的主要因素。对接截面药芯焊丝穿过固定模拔丝产生轴向扭曲,以及焊丝表面拔丝粉残留等现象,是拉丝装置运行中影响焊丝品质的主要因素。手工检测药粉填充率在规定数值之内时,其产品品质还是有保障的;红外线在线检测法是一种定性方法,不能保证焊丝品质质量;专利介绍的在线自动检测法对焊丝品质质量的影响取决于测量精度。

The production process flux-cored wire by strip steel method and its necessary equipments were introduced.Structural characteristics and operation principle of major equipments and its correlation with wire quality were discussed.The results show that the production process of flux-cored wire by strip steel method is more complex,and the types of necessary equipments or devices are more,and their structural characteristics and operation principles are different.The inhomogeneity,stratification and poor liquidity in filling powder are main influencing factors on wire quality in operation of filling powder device.The peach cross section,closed deviation interface,powder filling rate of instability and poor adjustability are main factors on wire quality in operation of forming device.Axial distortion of wire and residual powder on wire surface are main factors on wire quality in operation of drawing device when the flux-cored wire passes through a fixed-mode.Wire quality can be assured when the powder filling rate by manual measurement is in the specified range.On-line measurement by infrared measuring instrument is a qualitative measurement method,which does not guarantee the quality of welding wire.The effects on the wire quality depend on the accuracy in on-line automatic measurement described in the patent.