Simulation and experimentalanalysis of composite chamfering of superhard cutting toolsbased on edge grinding technology
-
摘要: 为了改善圆弧刃倒棱PCD车刀在加工时出现的切屑积聚现象,减小加工时的刀具磨损,提高其加工性能,在圆弧刃倒棱车刀基础上进行二次倒棱处理,使其形成复合倒棱结构。在CATIA软件中依据磨床CORBENR RG9实际刃磨PCD倒棱刀具的工艺,建立圆柱形后刀面复合倒棱车刀三维模型,然后使用Deform V11.0软件进行PCD复合倒棱车刀三维切削仿真分析。并根据仿真分析结果进行了PCD复合倒棱车刀与PCD一阶倒棱车刀切削实验对比分析。结果表明:切削深度相比一阶倒棱宽度较小时,二阶倒棱宽度应大于切深;切削深度较大接近一阶倒棱宽度时,二阶倒棱宽度应为小于切深的较小值。切深较小未超过二阶倒棱区域时,选择较大的二阶倒棱角度;在切深较大时,选择较小的二阶倒棱角度。在相同切削深度下PCD复合倒棱车刀的切削温度小于PCD一阶倒棱车刀。在切削深度为0.14mm时,随着切削时间的增加PCD复合倒棱车刀加工零件表面粗糙度要小于PCD一阶倒棱车刀;对比加工30分钟时刀具磨损形貌发现:PCD复合倒棱车刀磨损更小。
关键词 PCD车刀; 切削深度; 表面粗糙度; 刀具磨损
中图分类号 TG71; TG58Abstract: In order to improve the phenomenon of chip accumulation during the processing of arc edge chamfered PCD turning tools, reduce tool wear during processing, and improve their processing performance, a secondary chamfering treatment is carried out on the basis of arc edge chamfered turning tools to form a composite chamfering structure. In CATIA software, based on the actual process of grinding PCD chamfered cutting tools using the grinding machine CORBENR RG9, a three-dimensional model of the cylindrical back face composite chamfered turning tool is established. Then, the Deform V11.0 software is used for 3D cutting simulation analysis of the PCD composite chamfered turning tool.And based on the simulation analysis results, a comparative analysis was conducted on the cutting experiments of PCD composite chamfer turning tool and PCD first-order chamfer turning tool.The results show that when the cutting depth is smaller than the first order chamfer width, the second order chamfer width should be greater than the cutting depth; When the cutting depth is close to the first order chamfer width, the second order chamfer width should be smaller than the cutting depth. When the cutting depth is small and does not exceed the second order chamfer area, choose a larger second order chamfer angle; When the cutting depth is large, choose a smaller second order chamfer angle.At the same cutting depth, the cutting temperature of PCD composite chamfer turning tool is lower than that of PCD first-order chamfer turning tool. When the cutting depth is 0.14mm, as the cutting time increases, the surface roughness of the parts processed with PCD composite chamfered turning tools is smaller than that of PCD first order chamfered turning tools; Comparing the tool wear morphology after 30 minutes of processing, it was found that the PCD composite chamfered turning tool had less wear.-
Key words:
- pcd turning tool /
- cutting depth /
- surface roughnesse /
- tool wear
点击查看大图
计量
- 文章访问数: 257
- HTML全文浏览量: 64
- 被引次数: 0