The Experts below are selected from a list of 633 Experts worldwide ranked by ideXlab platform

Jean-yves Hascoet - One of the best experts on this subject based on the ideXlab platform.

  • Trochoidal Milling and plunging strategies in rough Pocket Milling of aluminium alloys
    2017
    Co-Authors: Jean-yves Hascoet, Matthieu Rauch
    Abstract:

    Pocket Milling is an essential issue in rough Milling. Although the technology progress increased the machining capacities and enabled new machine structures, no significant evolution was observed about Pocket Milling trajectories. Trochoïds and plunge Milling are new types of strategies which have found practical applications in hard materials rough Milling, especially die manufacturing. On a productivity point of view, they were not favourable until the development of high-speed machine tools. This paper aims at evaluating the potential of trochoïdal Milling and plunge cutting strategies in rough Pocket Millings. Algorithms were developed to generate trochoïdal and plunge cutting trajectories for Pocket Milling, with cycle time optimisation regarding to milled surfaces quality. Then, an experimental campaign has been done to compare the new strategies with classical ones. The study focused both on productivity and quality issues. The influence of the machine tool capacities and architecture was also examined. Two different high speed Milling dedicated machine tools were tested: a serial three-axis machine tool with "classic" dynamic capacities, and a parallel kinematics five-axis machine tool with high dynamic capacities. The results of this work leads to a better definition of the strengths and weaknesses of trochoïdal Milling and plunge cutting strategies in aluminium alloys rough machining with the focus to optimize the choice of strategies.

  • Improving trochoidal tool paths generation and implementation using process constraints modelling
    International Journal of Machine Tools and Manufacture, 2009
    Co-Authors: Matthieu Rauch, Emmanuel Duc, Jean-yves Hascoet
    Abstract:

    With the emergence of high dynamic machine tools equipped with performing NC controllers, new types of strategies have risen to meet the demands associated to high-speed Milling process. Among them, trochoidal tool paths are applied in rough machining applications. In this paper several improvements for their implementation are proposed. First, maximal radial depth of cut calculation according to tool path parameterization is made. Two interpolation models are tested and compared. The aim is to select the best tool path parameters according to the process constraints. Then, improved tool path generation for Pocket Milling applications is proposed. An experimental study is performed to validate the proposed approach and study the efficiency of trochoidal tool path implementation for Pocket Milling applications. The impact of the dynamics of the machine tool is evaluated in particular. The work presented here leads consequently to enhancement of implementation of trochoidal tool paths according to process constraints.

  • Rough Pocket Milling with trochoidal and plunging strategies
    International Journal of Machining and Machinability of Materials, 2007
    Co-Authors: Matthieu Rauch, Jean-yves Hascoet
    Abstract:

    Trochoids and plunge Milling are new types of strategies for Pocket Milling. This paper aims at evaluating their potential in rough Pocket Milling of aluminium alloys. After the identification of their trajectory parameters, an experimental campaign is done to compare these new strategies with classical ones. This study focuses on productivity, quality and machine tool dynamics issues.

  • Génération de trajectoires de tréflage et d'usinage trochoïdal pour le vidage de poche
    Mécanique & Industries, 2007
    Co-Authors: Matthieu Rauch, Jean-yves Hascoet
    Abstract:

    Pocket Milling is an essential issue in rough Milling. Although machining capacities have been strongly modified, no significant evolution was observed about Pocket Milling trajectories. Trochoids and plunge Milling are new types of strategies which have found practical applications in hard materials rough Milling. This paper aims at evaluating their potential in rough Pocket Milling of aluminium alloys. Algorithms were developed to generate trochoidal and plunge cutting trajectories for Pocket Milling, with cycle time optimisation regarding to milled surfaces quality. An experimental campaign has also been done and focused both on productivity and quality issues. Two different high speed Milling machine tools were tested: a serial three-axis machine tool and a parallel kinematics five-axis machine tool. The results of this work leads to a better definition of the strengths and weaknesses of trochoidal Milling and plunge cutting strategies in aluminium alloys rough machining with the focus to optimize the choice of strategies.

Matthieu Rauch - One of the best experts on this subject based on the ideXlab platform.

  • Trochoidal Milling and plunging strategies in rough Pocket Milling of aluminium alloys
    2017
    Co-Authors: Jean-yves Hascoet, Matthieu Rauch
    Abstract:

    Pocket Milling is an essential issue in rough Milling. Although the technology progress increased the machining capacities and enabled new machine structures, no significant evolution was observed about Pocket Milling trajectories. Trochoïds and plunge Milling are new types of strategies which have found practical applications in hard materials rough Milling, especially die manufacturing. On a productivity point of view, they were not favourable until the development of high-speed machine tools. This paper aims at evaluating the potential of trochoïdal Milling and plunge cutting strategies in rough Pocket Millings. Algorithms were developed to generate trochoïdal and plunge cutting trajectories for Pocket Milling, with cycle time optimisation regarding to milled surfaces quality. Then, an experimental campaign has been done to compare the new strategies with classical ones. The study focused both on productivity and quality issues. The influence of the machine tool capacities and architecture was also examined. Two different high speed Milling dedicated machine tools were tested: a serial three-axis machine tool with "classic" dynamic capacities, and a parallel kinematics five-axis machine tool with high dynamic capacities. The results of this work leads to a better definition of the strengths and weaknesses of trochoïdal Milling and plunge cutting strategies in aluminium alloys rough machining with the focus to optimize the choice of strategies.

  • Improving trochoidal tool paths generation and implementation using process constraints modelling
    International Journal of Machine Tools and Manufacture, 2009
    Co-Authors: Matthieu Rauch, Emmanuel Duc, Jean-yves Hascoet
    Abstract:

    With the emergence of high dynamic machine tools equipped with performing NC controllers, new types of strategies have risen to meet the demands associated to high-speed Milling process. Among them, trochoidal tool paths are applied in rough machining applications. In this paper several improvements for their implementation are proposed. First, maximal radial depth of cut calculation according to tool path parameterization is made. Two interpolation models are tested and compared. The aim is to select the best tool path parameters according to the process constraints. Then, improved tool path generation for Pocket Milling applications is proposed. An experimental study is performed to validate the proposed approach and study the efficiency of trochoidal tool path implementation for Pocket Milling applications. The impact of the dynamics of the machine tool is evaluated in particular. The work presented here leads consequently to enhancement of implementation of trochoidal tool paths according to process constraints.

  • Rough Pocket Milling with trochoidal and plunging strategies
    International Journal of Machining and Machinability of Materials, 2007
    Co-Authors: Matthieu Rauch, Jean-yves Hascoet
    Abstract:

    Trochoids and plunge Milling are new types of strategies for Pocket Milling. This paper aims at evaluating their potential in rough Pocket Milling of aluminium alloys. After the identification of their trajectory parameters, an experimental campaign is done to compare these new strategies with classical ones. This study focuses on productivity, quality and machine tool dynamics issues.

  • Génération de trajectoires de tréflage et d'usinage trochoïdal pour le vidage de poche
    Mécanique & Industries, 2007
    Co-Authors: Matthieu Rauch, Jean-yves Hascoet
    Abstract:

    Pocket Milling is an essential issue in rough Milling. Although machining capacities have been strongly modified, no significant evolution was observed about Pocket Milling trajectories. Trochoids and plunge Milling are new types of strategies which have found practical applications in hard materials rough Milling. This paper aims at evaluating their potential in rough Pocket Milling of aluminium alloys. Algorithms were developed to generate trochoidal and plunge cutting trajectories for Pocket Milling, with cycle time optimisation regarding to milled surfaces quality. An experimental campaign has also been done and focused both on productivity and quality issues. Two different high speed Milling machine tools were tested: a serial three-axis machine tool and a parallel kinematics five-axis machine tool. The results of this work leads to a better definition of the strengths and weaknesses of trochoidal Milling and plunge cutting strategies in aluminium alloys rough machining with the focus to optimize the choice of strategies.

Nazim Sakarya - One of the best experts on this subject based on the ideXlab platform.

  • The effects of cutter path strategies on surface roughness of Pocket Milling of 1.2738 steel based on Taguchi method
    Journal of Materials Processing Technology, 2007
    Co-Authors: Cevdet Gologlu, Nazim Sakarya
    Abstract:

    In Pocket Milling which is often encountered in plastic mould manufacture, the demand is to narrow the interval between the surface roughness values obtained at finish Milling and the surface roughness values will be met by further finishing operations as far as possible. The implementation and selection of cutting path strategies with appropriate cutting parameters have significant effect on surface roughness. The effect of every single variable on surface roughness is known, however, what kind of results is revealed in their combinations cannot be clearly estimated. The aim of this study is, first, to investigate optimum cutting characteristics of DIN 1.2738 mould steel using high-speed steel end mills. The cutting parameters considered are cutting velocity, feed rate, depth of cut and step over. The second aim is to identify the effects of cutter path strategies when employing in Pocket Milling. The both aims will be addressed by means of using Taguchi parameter design.

Z. Qin - One of the best experts on this subject based on the ideXlab platform.

  • Pocketing toolpath optimization for sharp corners
    Journal of Materials Processing Technology, 2007
    Co-Authors: Z.y. Zhao, Cheng Yong Wang, H.m. Zhou, Z. Qin
    Abstract:

    Abstract In Pocket Milling, there may be residual material left at sharp corners when stepover is inappropriately large in contour-parallel tool paths. According to this problem, the paper proposes an improved NC toolpath generation strategy in order to optimize NC machining processes for Pocket Milling. By inserting two types of biarc transition segments in contour-parallel toolpaths, the new method can remove the residual material completely without cutter compensation, produce second order continuous toolpath, and allow the stepover to be as wide as possible to reduce the machining time. A machining experiment has been implemented to validate the efficiency of the method.

H J J Kals - One of the best experts on this subject based on the ideXlab platform.

  • an experimental investigation of rectangular Pocket Milling with abrasive water jet
    Journal of Materials Processing Technology, 1998
    Co-Authors: S Paul, A M Hoogstrate, C A Van Luttervelt, H J J Kals
    Abstract:

    Rectangular Pocket Milling is a new area where abrasive water jet machining is being introduced. The main concern in Pocket Milling by abrasive water jet has been the high variation in the depth of the Pocket. In this study, a simple technique of Milling has been developed consisting of a longitudinal pass and a transverse pass. The effect of different parameters have been studied on the variation in the depth of the Pocket, the material removal rate, the erosion factor and the depth of material removal per machining cycle. Empirical models have been developed using proper design of experiments and regression analysis. It seems that the variation in the depth of the Pocket can be controlled to a value of 0.04 mm with an acceptable surface finish.