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兖州矿业(集团)公司综机设备租赁站在分析我国综采设备质量、可靠性基础上,找出了与世界先进水平的差距。①材料性能就技术标准。关键部位的高强度合金钢大量依靠进口,且比国外低一个等级。密封材料及制造质量有较大差距,支架漏液、窜液普遍存在,初撑力和工作阻力低。片面追求少投入,不选择技术性能好、寿命长的设备,从设计上降低可靠性;②设备制造和工艺。国外智能化设备在煤机焊接结构制造中已使用多年,我国近年开始推广,但精尖设备稀少,运行阻力加大、密封磨损严重。合金钢精密铸造质量不稳定,表面粗糙度及尺寸精度低于国际一般水平。专用高效高精度定位装夹工
Yanzhou Mining (Group) Co., Ltd. integrated machine equipment rental station in the analysis of the quality and reliability of China’s fully mechanized mining equipment, found the gap with the world’s advanced level. ① material performance on the technical standards. The key parts of high-strength alloy steel relies heavily on imports, and a lower level than abroad. There is a big gap between the quality of sealing materials and manufacturing, stent leakage, channeling fluid prevalence, initial support and work resistance is low. One-sided pursuit of less investment, do not choose a good technical performance, long life of the equipment, from the design to reduce reliability; ② equipment manufacturing and technology. Foreign intelligent equipment has been used for many years in the manufacture of welded structures of coal machines. China has started to promote it in recent years. However, sophisticated equipment is scarce with increased operational resistance and severe seal wear. Alloy steel precision casting unstable quality, surface roughness and dimensional accuracy below the international average. Dedicated efficient high-precision positioning fixture workers