Surface-opening feature measurement using coordinate-measuring machines

Coordinate-measuring machines (CMM) with contact probes have been widely used in industry for quality inspection and reverse engineering. Despite its lower scanning speed, its tactile nature and precision level leads to more reliable measurement results compared with non-contact probes. Although extensive research effort has been spent on CMM-based measurement, the current research status does not lend an immediate application of CMM machines to the measurement of surface-opening features. When opening spaces are not taken into account in CMM path planning, the probing stylus would enter opening spaces, thus leading to significant measurement errors. This paper presents a methodology to measure surface-opening features using CMM with contact probes. Starting from estimated boundary points through extrapolating cubic spline curves, the probing styluses are able to search and compensate to the boundaries of opening features. The probing method is implementable in both computer-aided design (CAD)-guided mode and non-CAD-guided mode. In CAD-guided mode the probing stylus approaches along surface normal direction, while in non-CAD-guided mode the normal direction is first estimated through triangular method, and then followed by a correction procedure. The presented method is able to use contact probes to track and measure the boundaries of surface-opening features directly without using complicated data processing and sophisticated instrumentation.

[1]  Yueh-Jaw Lin,et al.  CAD-based CMM dimensional inspection path planning - a generic algorithm , 2001, Robotica.

[2]  Owen Robert Mitchell,et al.  Inspection point placement and path planning algorithms for automatic CMM inspection , 2000, Int. J. Comput. Integr. Manuf..

[3]  P. Pedone,et al.  Designing small samples for form error estimation with coordinate measuring machines , 2011 .

[4]  Chia-Hsiang Menq,et al.  Multiple-sensor integration for rapid and high-precision coordinate metrology , 2000 .

[5]  T. Brown,et al.  Rapid Manufacturing in Biomedical Materials: Using Subtractive Rapid Prototyping for Bone Replacement , 2008 .

[6]  Wang Jianguo,et al.  Complete 3D measurement in reverse engineering using a multi-probe system , 2005 .

[7]  A. Y. T. Sun,et al.  Comprehensive design of experiments-based framework for optimal CMM inspection and uncertainty analysis of form tolerances , 2002 .

[8]  D. Hutmacher,et al.  Scaffold development using 3D printing with a starch-based polymer , 2002 .

[9]  Alan C. Lin,et al.  An innovative algorithm for statistic sampling of measured points and simplifying measuring probe orientation for sculpture surfaces , 2008 .

[10]  Hoda A. ElMaraghy,et al.  Automatic sampling for CMM inspection planning of free-form surfaces , 2002 .

[11]  Ye Li,et al.  Measuring external profiles of porous objects using CMM , 2013 .

[12]  Emad Abouel Nasr,et al.  Rapid prototyping : theory and practice , 2006 .

[13]  Stephen C. Veldhuis,et al.  CAD-based sampling for CMM inspection of models with sculptured features , 2007, Engineering with Computers.

[14]  F. L. Chen,et al.  Sculptured surface reconstruction from CMM measurement data by a software iterative approach , 1999 .

[15]  Alan C. Lin,et al.  Probe-radius compensation for 3D data points in reverse engineering , 2002, Comput. Ind..

[16]  Zone-Ching Lin,et al.  Collision-free path planning for coordinate measurement machine probe , 2001 .

[17]  Yingjie Zhang,et al.  Adaptive sampling method for inspection planning on CMM for free-form surfaces , 2013 .

[18]  Yin Zhongwei,et al.  A methodology of sculptured surface fitting from CMM measurement data , 2003 .

[19]  Alessandro Balsamo,et al.  Evaluation of CMM Uncertainty Through Monte Carlo Simulations , 1999 .

[20]  Dong-Woo Cho,et al.  Fabrication of a SFF-based three-dimensional scaffold using a precision deposition system in tissue engineering , 2008 .