Simulation Study on Single-Lip Deep Hole Drilling Using Design of Experiments

Journal of Manufacturing and Materials Processing

Hans-Christian Möhring¹  Robert Wegert¹  Siegfried Schmauder²  Daniel Fandiño²  Vinzenz Guski² 

[1] Institute for Machine Tools, University of Stuttgart, 70174 Stuttgart, Germany;Institute for Materials Testing, Materials Science and Strength of Materials, University of Stuttgart, 70569 Stuttgart, Germany;

关键词: design of experiments;    ANOVA;    residual stress;    single-lip deep hole drilling;    FEA;    Johnson–Cook constitutive law;   

DOI  :  10.3390/jmmp5020044

来源: DOAJ

【 摘 要 】

Single-lip deep hole drilling (SLD) is characterized by a high surface quality and compressive residual stress in the subsurface of the drill hole. These properties are strongly dependent on the cutting parameters of the SLD process and the actual geometry of the insert and the guide pads. In the present work, full 3D FE simulations of the SLD process were carried out to analyze the thermo-mechanical as-is state in the drilling contact zone by evaluating the feed force, the temperature, as well as the residual stress in the drill hole subsurface. An extensive simulation study was conducted on the effect of the process parameters on the properties using design of experiments (DoE). For the simulations, the Johnson–Cook (JC) constitutive law and the element elimination technique (EET) were applied to represent the material behavior of the workpiece, including chip formation. In-process measurements as well as results from the hole-drilling method to determine residual stresses were conducted to verify the numerical results. By means of DoE and analysis of variance (ANOVA), regression models were developed to describe the effect of the feed rate, cutting speed, and guide pad height on the temperature, feed force, and residual stress in the subsurface.

【 授权许可】

Unknown