Breaking mechanism of chips in intermittently decelerated feed drilling of aluminum alloys.
Breaking mechanism of chips in intermittently decelerated feed drilling of aluminum alloys.
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DOI：
10.2464/jilm.48.195
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
K. Sakurai;K. Adachi;S. Hanasaki
中科院分区：
文献类型：
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作者：
K. Sakurai;K. Adachi;S. Hanasaki
本研究是一项确定最佳切削条件的基础研究，其主要目的是揭示间歇性减速进给钻进过程中产生的连续锥形螺旋切屑的断裂机理。通过实验确定了切屑穿过钻槽时的摩擦力矩和切屑的断裂力矩，并对断续减速进给钻进中切屑的断裂机理进行了研究。从获得的结果中确定了以下事实。(1)间歇减速进给钻孔形成的切屑在切屑厚度变化点处断裂。(2)当孔壁与切屑产生的摩擦力矩超过切屑的断裂力矩时，就会发生切屑断裂。(3)切屑破碎仅取决于快进段的长度或快、慢进段的总长度，并根据切屑的断裂强度而变化。
This study involves a basic research to determine the optimum cutting condition with the main objective of revealing the breaking mechanism of the continuous cone-shaped helical chips produced during intermittently decelerated feed drilling. The friction torque due to chips flowing through the drill flute and the breaking torque of chips are determined experimentally and the breaking mechanism of chips in intermittently decelerated feed drilling is investigated. The following facts are ascertained from the obtained results. (1) Chips formed in intermittently decelerated feed drilling break at points where chip thickness changes. (2) Chip breakage occurs when the resulting friction torque between the hole wall and chip exceeds the breaking torque of chips. (3) Chip breakage depends solely on the length of the fast feed section or the total length of the fast and slow feed sections, and varies according to the breaking strength of chips.