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提高nm501耐磨钢板数控切割质量的三种方法二

放大字体  缩小字体 发布日期:2020-03-03 14:30:44    来源:钢源网    作者:钢源网    浏览次数:7239
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可根据板厚选择割嘴类型。切割喷嘴数量越多,可切割的NM500耐磨钢板厚度越厚。割嘴与钢板的距离应在同一平面上。离切割喷嘴太近

可根据板厚选择割嘴类型。切割喷嘴数量越多,可切割的NM500耐磨钢板厚度越厚。割嘴与钢板的距离应在同一平面上。离切割喷嘴太近容易堵塞切割喷嘴。过大会增加钢板的预热面积,增加变形,降低切割速度。 数控切割机由计算机实时控制实现。它能识别程序,所以钢板上零件的编程方法对切割零件的质量起着决定性的作用。对于细长件,按常规方法切割时,由于钢板受热变形,往往会出现起拱和翘曲,稍有忽视的操作就会遇到割嘴,影响切割过程的顺利进行。容易引起熄火、弯曲、割炬等事故。因此,可以采用局部喷水冷却;“桥”缝切割,即人工切割边缘留有几段15-30mm的“桥”不切割,使其通过“桥”与主板相连,拉制冷收缩而起拱;两个切割炬同时切割腹板两侧的长边缝,最后横向切割到所需尺寸,从而有效地进行细长件的切割。切割质量控制。 对有孔零件进行切割时,应先将零件内孔切出,再将零件周边切出。这有利于保证内孔和周边的尺寸精度。适当的开孔可以大大缩短喷嘴的清洗时间,提高工作效率。此外,还可以进一步减小内孔直径,适当增加板厚。为缩短预热时间,应适当增加预热氧,选择合理的穿孔点,观察钢板预热位置的变化。达到切割温度后,打开切割氧控制阀,适当提高速度,直至切割氧控制阀全部打开,即可完成射孔作业。 在穿孔过程中,应注意调整速度和氧气控制阀,使炉渣与割嘴呈40度左右。向那个方向飞去。当内孔直径小于板厚时,不宜开孔,应加工;当板厚超过120mm时,不宜开孔。如果内孔直径较大,可在相应位置用机械加工方法钻取20 mm的切削孔,然后再切割内孔。直至切割氧控制阀全部打开,即可完成射孔作业。The type of cutting nozzle can be selected according to the thickness of plate. The larger the number of cutting nozzles, the thicker the thickness of nm500 wear-resistant steel plate that may be cut. The distance between the cutting nozzle and the steel plate should be on the same plane. Too close to the cutting nozzle can easily block the cutting nozzle. Too far will increase the preheating area of the steel plate, increase the deformation and reduce the cutting speed.     NC cutting machine is realized by real-time control of computer. It recognizes the program, so the programming method of parts on steel plate plays a decisive role in the quality of cutting parts.     For slender parts, when cutting according to the conventional method, because the steel plate is heated and deformed, there will often be arch and warping, slightly neglected operation will encounter the cutting nozzle, affecting the smooth cutting process. It is easy to cause flameout, bending, cutting torch and other accidents. Therefore, local water-jet cooling can be used; "bridge" joint cutting, that is, artificial cutting edge to leave a few sections of 15-30mm "bridge" not cutting, so that it is connected with the motherboard through the "bridge" to pull refrigeration shrinkage and arch; two cutting torches at the same time cut the long side seams on both sides of the web, and finally transverse cutting to the required size, so as to effectively carry out slender parts. Cutting quality control.     When cutting the parts with holes, the inner holes of the parts should be cut out first, and then the periphery of the parts should be cut. This is conducive to ensuring the dimensional accuracy of the inner holes and the periphery. If perforated properly, it can greatly reduce the cleaning time of the cutting nozzle and improve the working efficiency. In addition, the diameter of the inner hole can be further reduced, and the thickness of the plate can be appropriately increased. In order to reduce the preheating time, the preheating oxygen should be increased appropriately, the reasonable perforation point should be selected, and the change of the preheating place of the steel plate should be observed. When the cutting temperature is reached, the cutting oxygen control valve should be opened, and the speed should be increased appropriately until all the cutting oxygen control valves are opened, then the perforation operation can be completed.     In the process of perforation, attention should be paid to adjusting the speed and oxygen control valve to make the slag roughly 40 degrees with the cutting nozzle. Fly out in the direction. When the diameter of the inner hole is smaller than the thickness of the plate, it is not suitable to cut through the hole, which should be machined; when the thickness of the plate exceeds 120 mm, it is not suitable to cut through the hole. If the diameter of the inner hole is larger, the cutting hole of 20 mm can be drilled by mechanical processing method at the corresponding position, and then the inner hole can be cut.








 
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