基于正交切削理论的高温粉末合金切削过程参数优化

2020-10-21

作者：孙建男1，张顺琦1，林绿胜2，应申舜3，林斌2 单位：1上海大学机电工程与自动化学院；2浙江畅尔智能装备股份有限公司；3浙江工业大学特种装备制造与先进加工技术教育部重点试验室

摘要：高温粉末合金切削加工过程中涉及复杂的热-力动态耦合，常使刀具发生损坏，影响效率和加工成本。综合传统高温合金正交切削模型，基于JohnsonCook材料本构方程和失效模型建立了考虑前后刀面摩擦的切削力计算模型。利用该双摩擦切削力模型计算GH4169高温合金切削过程中的切削力，并得到与文献试验值一致的结果。利用有限元仿真软件计算相同参数下的切削力，获得数据与试验值和计算值接近，表明该双摩擦切削力计算模型符合实际情况。通过调整不同的刀具前角参数，得到切削力和切削最高温度随刀具前刀面角度变化的趋势。

关键词：正交切削理论；高温粉末合金；切削有限元仿真；参数优化

中图分类号：TG506；TH164文献标志码：ADOI：10.3969/j.issn.1000-7008.2020.06.008

Parameter Optimization of High Temperature Powder Alloy Cutting

Process Based on Orthogonal Cutting Theory

Sun Jiannan，Zhang Shunqi，Lin Lvsheng，Ying Shenshun，Lin Bin

Abstract:In the process of superalloy cutting，there is complex dynamic thermomechanical coupling，and tool wear is serious，which affected the processing efficiency and cost.The traditional orthogonal cutting model of superalloy is synthesized from the point of view of basic principle，and the constitutive equation and failure model of JohnsonCook material are considered.The cutting force calculation model considering both the frictions on the rake and clearance faces is established.The cutting force of GH4169 superalloy in cutting process is calculated by using the double friction cutting force calculation model，and the results are consistent with the experimental values in the literature.Then the cutting force under the same parameters is calculated by the finite element simulation software.The data obtained are very close to the experimental and calculated values，which shows that the numerical model of double friction cutting force is in line with the actual situation.By adjusting different tool rake angle parameters，the trend of cutting force and maximum cutting temperature changing with tool rake angle is obtained.

Keywords:orthogonal cutting；superalloy cutting；finite element simulation of cutting model；parameter optimization