A study on estimation of 3-dimensional surface roughness of boring processes including kinematic motion deviations

Abstract

The surface roughness is one of the most important characteristics of machined parts. A systematic method is proposed in the paper to simulate the shape generation processes in the boring operations and to estimate the surface roughness of the generated faces, based on the machining parameters. The simulation model includes both the models of the shape generation motions considering kinematic motion deviations and the cutting tool geometries. The shape generation motions with deviations are mathematically described by 4 by 4 transformation matrices. A set of points on the bored holes are generated through the simulations, and an assessment surface is obtained as the datum reference to estimate the 2-dimensional (2D) and the 3-dimensional (3D) surface roughness, based on the points generated by the boring process simulations. The proposed method provides us with a systematic method to estimate the surface roughness in the boring processes including the kinematic motion deviations.

A Study on estimation of three-dimensional tolerances based on simulation of virtual machining in turning processes including kinematic motion deviations

“…The start and end contact angles of the tool nose with the workpiece can be calculated by the equations that have been adapted from Ramaswami (2010). In triangles P int-1 P mid-1 C i and triangles P int+1 P mid+1 C i angles φ i-1 and φ i+1 are obtained based on the proposed method (Thasana, et al, 2014).…”

“…The boring process simulations are carried out based on the model and the procedures proposed in Thasana et al (2014). A set of the points on the turned and bored faces are generated.…”

“…A simulation model was proposed and applied to the estimation of the 3-dimensional surface roughness in the boring processes (Thasana, et al, 2014). In the present paper, the simulation model is expanded to simulate the turning processes with kinematic motion deviations.…”

“…A systematic method is also proposed to verify the 3D tolerances of the turned faces based on the simulation results. The 3D tolerance analysis method is also applied to the verifications of the bored faces presented in the previous paper (Thasana, et al, 2014). The shape generation processes of the machine tools are generally represented by the shape generation motions, and also the tool geometries.…”

Analysis and optimization of assembly precision-cost model based on 3D tolerance expression

“…Wang et al (2006) studied the freedom analysis model from tolerance zone mapping to deviation space for several characteristics. Thasana et al (2014) provided a systematic method to estimate the geometric dimension and tolerance in the turning processes containing the kinematic motion deviations. Sandipan and Jhareswar (2012) provided a comprehensive method by reviewing dimensional tolerance synthesis.…”