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(一)鑽头的技术要求:为了便鑽头能很好地配合鑽眼工作,所以对鑽头提出以下的技术要求;1.强度大,弹性好,使鑽头能有很大的破坏岩石的能力(需要机械性能好优质碳素工具钢的材料作鑽头)。2.硬度高可以使鑽头的耐磨性增强,延长使用寿命(用渗碳或淬火的办法来解决)。3.韧性大的鑽头可以耐受很大的冲击力,而不致使鑽头翼碎裂(限止材料中硫磷含量在最低限度内,并使鑽头在淬火后经过一定步骤的退火,使鑽头硬度在适当的减低下提高鑽头的韧性)。4.要求鑽头鑽出的炮眼既圆又直,尽量保持鑽头在常时期内直径不变,并且在鑽不同程度岩石时均能具有较大的鑽进速度(鑽头在加工时要有正确的形
(A) the drill bit technical requirements: In order to make the drill bit to work well with the drilling, so the drill made the following technical requirements; 1. Strength, good elasticity, the drill can have a great damage to the rock (Requires good mechanical properties of high-quality carbon tool steel as a drill bit). 2. High hardness can make the drill wear resistance, prolong the service life (with carburizing or quenching approach to solve). 3. Toughness of the drill bit can withstand great impact, without causing the drill fissure (to limit the content of phosphorous in the material at a minimum, and the bit after quenching after a certain degree of annealing, so that Bit hardness to improve bit toughness with proper reduction). 4. Requires the drill drilled hole both round and straight, as far as possible to keep the drill constant diameter of the same period, and in varying degrees of rock drilling can have a greater rate of drilling (drill bit in the processing have Correct shape