共搜索到1565条信息，每页显示10条信息，共157页。用时：0小时0分0秒611毫秒
Microstructure and properties of Fe-based coatings on cutting pick surface formed by plasma jet surface metallurgy CHEN Hao(陈 颢)1, 2, YANG Jian-gao(羊建高)2,LI Hui-qi(李惠琪)3 1. School of Materials...; Abstract: The Fe-based composite coatings were produced on the attrition spot of cutting pick by plasma jet surface metallurgy, and metallurgical bonding was obtained between coating and substrate......
2011 Abstract: In order to obtain the determining method of the installing angle and decrease the performance indices (cutting force and wearing rate) of the pick, the relationships among... experiments were done by employing two picks with different pick tip angles. The results indicate that, the cutting force is the smallest when the direction of the resultant force of pick follows its axis......
Reasonable location parameters of pick and nozzle in combined cutting systemZENG Rui(曾锐)1, 2, DU Chang-long(杜长龙)1, CHEN Rong-jun(陈荣俊)2, WANG Wen-juan(王文娟)1, 2(1. School of Mechanical and Electrical... pressure water jet combined cutting system is an effective technology to cut hard coal-rock, but one problem of the technology is the choice of pick and nozzle location parameters. In order to solve......
and pick distance, cutting thickness was built. The relationships among the HCM cutting specific energy consumption, the respirable dust and the relevant parameters were researched [2], which indicated that the cutting specific energy consumption and respirable dust were correlated with the pick geometry, pick arrangement, haulage speed and drum rotary speed. The relationship between the HCM cutting......
, which is a basis for further dynamic analysis of the shearer. BALCI et al [8] did the cutting experiments using the pick bit with different characteristics of coal rock. The results show..., static and dynamic elastic modulus of the coal rock. DU et al [9] studied the relationships between the pick arrangements of the drum with different start vanes and the cutting load fluctuation......
IF钢氮含量控制技术研究李伟东1,孙群1,林洋1(1.辽宁省鞍山市鞍钢股份有限公司第二炼钢厂)摘 要:介绍了鞍钢第二炼钢厂几年来在生产IF钢过程中对于氮成分控制方面所做的探索和研究,总结出低氮钢的生产技术和防止增氮技术.低氮钢的生产工艺包括转炉冶炼工序提高铁水比,冶炼过程控制返干,冶炼终点减少补吹次数和时间,采用铁矿石造渣,可以显著地降低转炉冶炼终点的氮含量;RH-TB精炼工序处理前期提高脱碳速度,处理中期快速提高真空度,提高提升氩气流量和钢水循环量,处理后期控制钢水中的氧含量,同时必须保证钢水极低的硫含量.防......
......
Improvement of Drill Performance in Metal Cutting Using MoST Solid Lubricant Coatings S. Hickman1,N.R. Thomas1,D.G. Teer1,S. Yang1 (1.Teer Coatings Ltd., West Stone House, West Stone, Berry Hill Industrial Estate, Droitwich, WR9 9AS, UK) 摘要:Coated tools are widely used in today''s metal cutting industries and have significantly improved machining productivity through reducing operation costs......
7所示,其统计分析结果如表2所示. (a) 顺序式；(b) 棋盘式；(c) 畸变Ⅰ式；(d) 畸变Ⅱ式 图7 不同截齿排列的滚筒扭矩 Fig.7 Torque of different pick arrangement drums 表2 截割扭矩的统计分析 Table 2 Statistics analysis of cutting..., Xuzhou 221008, China) Abstract: According to the cutting coal theory of the shearer, the cutting testbed of the coal and rock was developed. And four type shearer drums (the sequence, the punnett......
Trans. Nonferrous Met. Soc. China 22(2012) s851-s858 Development of micro milling force model and cutting parameter optimization Shih-ming WANG, Da-fun CHEN, Min-chang JANG, Shambaljamts TSOOJ... of the cutting coefficients and the instantaneous projected cutting area that was determined based on the machining parameters and the rotation trajectory of the cutter edges. When an allowable micro......
