冲击载荷作用下锥形截齿磨损的试验和数值模拟研究

张倩倩1,韩振南1,张梦奇2,3,张建广2,3

振动与冲击 ›› 2016, Vol. 35 ›› Issue (13) : 58-65.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (13) : 58-65.
论文

冲击载荷作用下锥形截齿磨损的试验和数值模拟研究

  • 张倩倩1,韩振南1,张梦奇2,3,张建广2,3
作者信息 +

Experimental and numerical study on the wear of conical pick under impact load

  • ZHANG Qian-qian1, HAN Zhen-nan1, ZHANG Meng-qi2, 3, ZHANG Jian-guang2, 3
Author information +
文章历史 +

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。

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.

关键词

锥形截齿 / 耐磨性 / 截割载荷 / 离散元方法

Key words

conical pick / wear resistance / cutting force / discrete element method

引用本文

导出引用
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[J]. Journal of Vibration and Shock, 2016, 35(13): 58-65

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