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图学学报

• 专论：第12届中国计算机图形学大会 (CHINAGRAPH 广州) • 上一篇    下一篇

刀尖圆弧半径对主偏角影响的分析与实验研究

  

  1. 华北电力大学能源动力与机械工程学院，河北 保定 071003
  • 出版日期:2019-04-30 发布日期:2019-05-10
  • 基金资助:
    国家自然科学基金项目(51301068)；河北省自然科学基金项目(E2014502003)；中央高校基本科研业务费专项资金项目(17MS148)；河北省 高等学校科学技术研究项目(Z2015127)

Analysis and Experimental Research on Affection on Approach Angle of  Tool Nose Radius

  1. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding Hebei 071003, China
  • Online:2019-04-30 Published:2019-05-10

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摘要： 刀尖圆弧半径对加工精度、切削力等切削参数有重要影响，而主偏角直接影响切 削变形和切削力的变化。为了研究车刀刀尖圆弧半径对主偏角的影响，建立了刀具要素间的几 何关系。根据切削深度和刀尖圆弧半径大小，将切削条件划分为 4 种：①刀尖圆弧半径小于切 削深度，且主偏角为 90°；②刀尖圆弧半径小于切削深度，且主偏角小于 90°；③刀尖圆弧半径 小于切削深度，且主偏角大于 90°；④刀尖圆弧半径大于切削深度。根据刀尖圆弧半径和切削 深度之间的几何关系，分别计算了 4 种切削条件下刀尖圆弧半径导致的实际主偏角的变化。为 了验证分析结果，进行了切削实验，通过分析背向力和进给力的夹角计算实验主偏角。实验结 果证明，刀尖圆弧半径导致主偏角变小。

关键词: 刀尖圆弧半径, 主偏角, 切削深度, 几何关系, 切削力

Abstract: Tool nose radius has an important affection on machining precision and cutting force. To research the affection on approach angle of tool nose radius, a geometry relation of tool elements is constructed. The four cutting conditions are catalogued according to the comparison between cutting depth and tool nose radius: ① tool nose radius < depth of cut, and approach angle is 90°; ② tool nose radius < depth of cut, and approach angle < 90°; ③ tool nose radius < depth of cut, and approach angle > 90°; ④ tool nose radius > depth of cut. The real approach angle is calculated caused by tool nose radius according to the geometry relation between tool nose radius and approach angle. The cutting force experiment has been conducted to verify the analysis result. Experimental approach angle is calculated by analyzing the angle between radial force and feed force. The experimental results show the tool nose radius lead to approach angle decrease.

Key words:  tool nose radius, approach angle, depth of cut, geometry relation, cutting force