Abstract
Automatization of engineering processes requires developing relevant mathematical support and a computer software. Analysis of metal cutting kinematics and tool geometry is a necessary key task at the preproduction stage. This paper is focused on developing a procedure for determining the geometry of oblique peakless round-nose tool lathe machining with the use of vector/matrix transformations. Such an approach allows integration into modern mathematical software packages in distinction to the traditional analytic description. Such an advantage is very promising for developing automated control of the preproduction process. A kinematic criterion for the applicable tool geometry has been developed from the results of this study. The effect of tool blade inclination and curvature on the geometry-dependent process parameters was evaluated.
Highlights
To develop the mechanical processing automation and condition monitoring, one needs a detailed understanding of both mechanics and kinematics of the process
Summing up the above mentioned, the aim of this study is to describe the peakless turning by round-nose tools using vector/matrix transformations, to estimate the geometry changes and optimize this geometry
The cutting blade geometry is given by the rake and clearance angle rotation matrices as follows:
Summary
To develop the mechanical processing automation and condition monitoring, one needs a detailed understanding of both mechanics and kinematics of the process. The first approach is to describe the process kinematics by analytic expressions, this traditional approach implies tediousness and high risk of error due to using complicated trigonometric functions It is not of common use for automated design and control applications. It is proved to be good for analyzing complicated kinematics cases, such as a complicated form of a workpiece or/and a tool as well as a complex trajectory of the tool/workpiece relative motion The use of this approach is limited due to its increased working time required for analysing a large number of the nodes modeling the contacting surfaces. It works well and fast to describe the process kinematics even for complex tool/workpiece trajectories and geometry Another advantage of such a description is its potential for automated computations. Summing up the above mentioned, the aim of this study is to describe the peakless turning by round-nose tools using vector/matrix transformations, to estimate the geometry changes and optimize this geometry
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