冲击载荷作用下锥形截齿磨损的试验和数值模拟研究

摘要
图/表
参考文献(20)
相关文章 (0)

全文: PDF (2918 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要通过试验和离散元数值模拟方法，研究锥形截齿的耐磨性能及其磨损特征对截割载荷的影响。在单齿旋转截割试验台上，以砂岩为试验对象，采用3种不同齿尖材料的锥形截齿进行岩石截割试验，并结合试验后齿尖的磨损面形状建立磨损截齿模型，利用PFC3D进行岩石截割的数值模拟研究。统计结果表明：在截割载荷各分量中，法向力显著高于切向力和侧向力；硬质合金截齿、合金钢截齿及有耐磨涂层的合金钢截齿的质量损失依次为0.07%，0.28%和0.22%，硬质合金耐磨性优势突出，堆焊耐磨涂层对截齿有一定的保护作用；齿尖磨损区域的扩展，使截齿连续过载，加剧磨损；通过离散元方法获得的截割载荷与试验方法测定结果接近。在相同截割条件下，对硬质合金和合金钢齿尖耐磨性能的研究，为截齿的寿命估计提供必要参考。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	张倩倩1
	韩振南1
	张梦奇2
	3
	张建广2
	3

关键词 ：锥形截齿, 耐磨性, 截割载荷, 离散元方法

Abstract：Wear resistance of conical pick and its wear characteristics influenced on cutting force were studied with experiments and numerical simulation. On the rotary cutting machine with a single pick, the cutting tests were performed on sandstone by using three conical picks made of different pick-tip materials. The wear model of pick was built according to the wear surface shape of pick tip, and the numerical simulation of rock cutting was studied by PFC3D software. Statistical results show that the normal force is significantly higher than the tangential force and lateral force in components of the cutting force; The quality loss of cemented carbide pick, alloy steel pick and alloy steel pick coated on wear resistance material were 0.07%, 0.28% and 0.22%, there are prominent advantage using cemented carbide as pick tip material, and surfacing welding the wear-resistant coating on pick has protective effect; An enlarged wear surface of pick tip results in the heavy load acting on pick continuously, which can aggravate the wear of pick; The cutting forces obtained by discrete element method was in close compliance with relevant experiment result. Under the same cutting conditions, the research results of wear resistance of pick tip made of cemented carbide and alloy steel provide the necessary reference for evaluate the pick life.

Key words： conical pick wear resistance cutting force discrete element method

收稿日期: 2015-01-14 出版日期: 2016-06-25

引用本文:

张倩倩1，韩振南1，张梦奇2,3，张建广2,3. 冲击载荷作用下锥形截齿磨损的试验和数值模拟研究[J]. 振动与冲击, 2016, 35(13): 58-65.
ZHANG Qian-qian1, HAN Zhen-nan1, ZHANG Meng-qi2, 3, ZHANG Jian-guang2, 3 . Experimental and numerical study on the wear of conical pick under impact load. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(13): 58-65.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I13/58

[1] Kenny P, Wright A C. Mechanism of wear of cemented carbide tips on rock cutting tools [J]. Wear, 1974, 30, 377-383.
[2] Mehrotra P K. A model for wear of conical coal mining bits [J]. Wear, 1986, 111: 403-417.
[3] Rogers S, Roberts B. Wear mechanisms associated with rock excavation using attack picks [J]. Mining Science and Technology, 1991, 12: 317-323.
[4] Dogruoz C，Bolukbasi N. Effect of cutting tool blunting on the performances of various mechanical excavators used in low- and medium-strength rocks [J]. Bulletin of Engineering Geology and the Environment, 2014, 73: 781-789.
[5] 张建广. EBZ260W型掘进机截割人工岩壁的截齿磨损研究[J]. 矿山机械, 2014, 42(9): 11-14.
    ZHANG Jian-guang. Study on pick abrasion during artificial rock cut by EBZ260W roadheader [J]. Mining Machine, 2014, 42(9): 11-14.
[6] Dewangan S, Chattopadhyaya S, Hloch S. Wear assessment of conical pick used in coal cutting operation [J]. Rock Mechanics and Rock Engineering. 2014, DOI 10.1007/s00603-014-0680-z.
[7] Yaralı O, Yaşar E, Bacak G, et al. A study of rock abrasivity and tool wear in Coal Measures Rocks [J]. International Journal of Coal Geology, 2008, 74: 53-66.
[8] Daolong Y, Jianping L, Liping W, et al. Experimental and theoretical design for decreasing wear in conical picks in rotation-drilling cutting process [J]. The International Journal of Advanced Manufacturing Technology, 2014, DOI 10.1007/s00170-014-6472-5.
[9] Khair A W, Achanti V B. Laboratory investigation of bit wear in water jet assisted cutting of a continuous miner [J]. International Journal of Rock Mechanics and Mining Sciences, 1998, 35(5), P505.
[10] Potyondy D O. A bonded-disk model for rock: relating micro properties and macro properties[C] // Proceedings of the Third International Conference. Santa Fe: [s. n.], 2002: 340-345.
[11] Potyondy D O, Cundall P A. A bonded-particle model for rock [J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 41: 1329-1364.
[12] Fakhimi A, Carvalho F, Ishida T, et al. Simulation of failure around a circular opening in rock [J]. International Journal of Rock Mechanics and Mining Sciences, 2002, 39(4): 507-515.
[13] 张学朋，王刚，蒋宇静，等. 基于颗粒离散元模型的花岗岩压缩试验模拟研究[J]. 岩土力学，2014，35（增刊）：99-105.
    ZHANG Xue-peng, WANG Gang, JIANG Yu-jing, et al. Simulation research on granite compression test based on particle
    discrete element model [J]. Rock and Soil Mechanics, 2014, 35 (Suup.): 99-105.
[14] 蒋明镜，陈贺，张宁，等. 含双裂缝岩石裂纹演化机理的离散元数值分析[J]. 岩土力学，2014，35(11)：3259-3288.
     JIANG Ming-jing, CHEN He, ZHANG Ning, et al. Distinct element numerical analysis of crack evolution in rocks containing pre-existing double flaw [J]. Rock and Soil Mechanics, 2014, 35(11): 3259-3288.
[15] Su O. Numerical simulation of rock cutting using the discrete element method [J]. International Journal of Rock Mechanics and Mining Sciences, 2011, 48 (3): 434-442.
[16] Jerzy R, Eugenio O. Discrete element simulation of rock cutting [J]. International Journal of Rock Mechanics and Mining Sciences, 2011, 48(6): 996-1010.
[17] Moon T, Oh J. A Study of Optimal Rock-Cutting Conditions for Hard Rock TBM Using the Discrete Element Method [J]. Rock Mechanics and Rock Engineering, 2012, 45(5): 837-849.
[18] Van Wyk G, Els D N J, Akdogan G, et al. Discrete element simulation of tribological interactions in rock Cutting [J]. International Journal of Rock Mechanics and Mining Sciences, 2014, 65: 8-19.
[19] 张梦奇，郝建生，马健康，张建广，等. 截齿对岩石截
    割机理试验平台：中国，201220560659.9 [P].2012-10-10.
ZHANG Meng-qi, HAO Jian-sheng, MA Jian-kang, et al. Test rig for rock cutting mechanism by single pick: China，201220560659.9 [P]. 2012-10-10.
[20] Itasca Consulting Group Inc. Particle flow code in 3 dimensions manual (version3.1) [M]. Minneapolis: Itasca Consulting Group Inc, 2006, 416-417.