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

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (13) : 58-65.

ZHANG Qian-qian1, HAN Zhen-nan1, ZHANG Meng-qi2, 3, ZHANG Jian-guang2, 3

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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

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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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