Calibration Accuracy of a Parallel Structure Machine Tool with Respect to Machined Part Quality

Modal Testing for Heavy Machine Tool Using Active Excitation

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.536-537.1326 ◽

2014 ◽

Vol 536-537 ◽

pp. 1326-1332 ◽

Cited By ~ 1

Author(s):

Bo Luo ◽

Bin Li ◽

Xin Yong Mao ◽

Hui Cai

Keyword(s):

Machine Tool ◽

Machine Tools ◽

Inertial Force ◽

Modal Testing ◽

Modal Parameters ◽

Part Quality ◽

Machine Tool Structure ◽

Machining Speed ◽

Heavy Machine ◽

Large Machine

For application in large machine tools, the machined part quality, accuracy as well as machining speed depende greatly on the dynamics of the structure. In this paper, an active-excitation modal analysis (AEMA), using inertial force of the moving slider to excite the structural modes, is proposed. Modal parameters of the machine tool structure estimated by AEMA are experimentally validated. Since the artificial excitation produced by elaborate excitation equipment is replaced by the inertial force of the slider, the proposed method is much more practical and economical than traditional methods.

Download Full-text

Sensitivity Analysis of an Overconstrained Parallel Structure Machine Tool, the Tripteor X7

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.162.394 ◽

2012 ◽

Vol 162 ◽

pp. 394-402 ◽

Cited By ~ 3

Author(s):

Helene Chanal ◽

Flavien Paccot ◽

Emmanuel Duc

Keyword(s):

Sensitivity Analysis ◽

Machine Tool ◽

Geometrical Parameter ◽

Machine Tools ◽

Inverse Kinematics ◽

Parallel Structure ◽

Geometrical Parameters ◽

Analytic Method ◽

Parallel Kinematics ◽

Geometrical Transformation

A main limitation of parallel kinematics machine tools (PKM) use for machining tasks is their accuracy low level mainly due to geometrical transformation errors. Indeed, such machine tools are geometrically controlled with an inverse kinematics model (IKM). For a large number of PKM, this IKM is defined with an analytic method and by introducing geometrical parameters. Thus, the influence of each geometrical parameter on the tool pose accuracy should be estimated via a sensitivity analysis. In the case of an overconstrained PKM, the IKM is generally computed with a numerical method. The sensitivity analysis leads to complex computation. The aim of this paper is to present a sensitivity analysis on the Tripteor X7, an overconstrained machine tool. This study is also a first step to define the geometrical identification method on this overconstrained mechanism.

Download Full-text

Predictive Maintenance and part quality control from joint product-process-machine requirements: application to a machine tool

Procedia Manufacturing ◽

10.1016/j.promfg.2018.10.166 ◽

2018 ◽

Vol 16 ◽

pp. 147-154 ◽

Cited By ~ 1

Author(s):

Alexandre Voisin ◽

Thomas Laloix ◽

Benoît Iung ◽

Eric Romagne

Keyword(s):

Quality Control ◽

Machine Tool ◽

Predictive Maintenance ◽

Part Quality ◽

Joint Product

Download Full-text

Accuracy Analysis of Machining Process Using a Spindle Probe and a CMM to Reduce the Scrap

Manufacturing Engineering and Materials Handling, Parts A and B ◽

10.1115/imece2005-81015 ◽

2005 ◽

Cited By ~ 2

Author(s):

Yongjin Kwon

Keyword(s):

Machine Tool ◽

Measurement Data ◽

Coordinate Measuring Machine ◽

Machining Process ◽

Inspection Time ◽

Cnc Machine ◽

Part Quality ◽

Post Process ◽

Measuring Machine ◽

Touch Probe

In-process part inspection using a spindle touch probe has gained a significant importance, mainly because parts can remain on the machine without disrupting the machine setup while inspection is being conducted. This practice leads to a shorter inspection time, improved part accuracies, and reduction of scraps. Recently, intense domestic and international competition has put more importance on part quality in terms of producing parts right the first time and maintaining the consistent quality standards. A literature review revealed that a comparative analysis between in-process gauging using a touch probe and post-process inspection using a coordinate measuring machine (CMM) to ascertain part quality has not been adequately studied. Therefore, there is a need for a study to measure the characteristics of the two inspection techniques. To address the problem, cutting experiments were conducted and measurement data were analyzed using a state-of-the-art CNC machine, a CMM, a touch probe, and a high-precision ballbar system. The experimental data show that machined features and touch probe measurements are affected by the inherent shortcomings in machine tool structure, suggesting a machine tool capability analysis be undertaken in tune with the required tolerance specifications prior to machining operations, rather than solely relying on the touch probe inspection for part quality assessment.

Download Full-text