Identification and geometrical modelling of complex shape surfaces using coordinate measuring machine and CAD/CAM systems

The study presents the possibility of using modern CAD/CAM systems for computer simulation of the process of making the detail on a numerically controlled lathe MIYANO BNA 42GTY. The Alkard CNC Wizard software was used. To verify the correctness of the implemented production process, a coordinate measuring machine Zeiss Prismo 5 with a Renishaw PH-20 head was used. The measurements were carried out using the Modus control software.

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Evaluation of dimensional accuracy of dental bridges manufactured with conventional casting technique and CAD/CAM system with Ceramill Sintron blocks using CMM

Journal of Dental Research Dental Clinics Dental Prospects ◽

10.15171/joddd.2018.041 ◽

2018 ◽

Vol 12 (4) ◽

pp. 264-271 ◽

Cited By ~ 2

Author(s):

Alireza Izadi ◽

Fariborz Vafaee ◽

Arash Shishehian ◽

Ghodratollah Roshanaei ◽

Behzad Fathi Afkari

Keyword(s):

Reference Model ◽

Coordinate Measuring Machine ◽

Dimensional Accuracy ◽

Three Dimensions ◽

Casting Technique ◽

Dimensional Changes ◽

Conventional Casting ◽

Cad Cam ◽

Milling Method ◽

Measuring Machine

Background. Recently, non-presintered chromium-cobalt (Cr-Co) blocks with the commercial name of Ceramill Sintron were introduced to the market. However, comprehensive studies on the dimensional accuracy and fit of multi-unit frameworks made of these blocks using the coordinate measuring machine (CMM) are lacking. This study aimed to assess and compare the dimensional changes and fit of conventional casting and milled frameworks using Ceramill Sintron. Methods. A metal model was designed and scanned and 5-unit frameworks were fabricated using two techniques: (I) the conventional casting method (n=20): the wax model was designed, milled in the CAD/CAM machine, flasked and invested; (II) the milling method using Ceramill Sintron blocks (n=20): the wax patterns of group 1 were used; Ceramill Sintron blocks were milled and sintered. Measurements were made on the original reference model and the fabricated frameworks using the CMM in all the three spatial dimensions, and dimensional changes were recorded in a checklist. Data were analyzed with descriptive statistics, and the two groups were compared using one-way ANOVA and Tukey test (α=0.05). Results. The fabricated frameworks in both groups showed significant dimensional changes in all the three dimensions. Comparison of dimensional changes between the two groups revealed no significant differences (P>0.05) except for transverse changes (arch) that were significantly greater in Ceramill Sintron frameworks (P<0.05). Conclusion. The two manufacturing processes were the same regarding dimensional changes and the magnitude of marginal gaps and both processes resulted in significant dimensional changes in frameworks. Ceramill Sintron frameworks showed significantly greater transverse changes than the conventional frameworks.

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Assessment of Free-Form Surfaces’ Reconstruction Accuracy

Metrology and Measurement Systems ◽

10.1515/mms-2017-0035 ◽

2017 ◽

Vol 24 (2) ◽

pp. 303-312 ◽

Cited By ~ 6

Author(s):

Artur Wójcik ◽

Magdalena Niemczewska-Wójcik ◽

Jerzy Sładek

Keyword(s):

Accuracy Assessment ◽

Coordinate Measuring Machine ◽

System Structure ◽

Free Form ◽

Correction Algorithm ◽

Reconstruction Accuracy ◽

Machining Center ◽

Cad Cam ◽

Measuring Machine ◽

Free Form Surfaces

AbstractThe paper presents the problem of assessing the accuracy of reconstructing free-form surfaces in the CMM/CAD/CAM/CNC systems. The system structure comprises a coordinate measuring machine (CMM) PMM 12106 equipped with a contact scanning probe, a 3-axis Arrow 500 Vertical Machining Center, QUINDOS software and Catia software. For the purpose of surface digitalization, a radius correction algorithm was developed. The surface reconstructing errors for the presented system were assessed and analysed with respect to offset points. The accuracy assessment exhibit error values in the reconstruction of a free-form surface in a range of ± 0.02 mm, which, as it is shown by the analysis, result from a systematic error.

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Computer-Aided Coordinate Metrology

13th Computers in Engineering Conference ◽

10.1115/cie1993-0028 ◽

1993 ◽

Author(s):

Hong-Tzong Yau ◽

Chia-Hsiang Menq

Keyword(s):

Three Dimensional ◽

Coordinate Measuring Machine ◽

Computer Integrated Manufacturing ◽

Integrated Manufacturing ◽

Coordinate Metrology ◽

Cad Cam ◽

Measuring Machine ◽

Three Dimensional Coordinate ◽

Inspection Machine ◽

Accuracy And Repeatability

Abstract Three-dimensional coordinate metrology has gained much attention in recent years. On one hand, the accuracy and repeatability of a coordinate measuring machine (CMM) are approaching the sub-micron level. On the other hand, there is hardly any part that exists of which the dimensions cannot be measured with a CMM. This paper presents the recent development and applications in three-dimensional coordinate metrology. The emphasis has been placed in the utilization of computers and integration with CAD/CAM systems. Three important technologies, namely, CAD-directed inspection, three-dimensional optimal match, and reverse engineering are presented and discussed. With computers and CAD/CAM support, three-dimensional coordinate metrology has become an active part of the computer-integrated manufacturing (CIM). Its versatility and high degree of automation have made the CMM a universal inspection machine for quality control of manufactured parts in computer integrated manufacturing.

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Application of the Three Dimensional Coordinate Measuring Machine (CAD/CAM for the New Cosmetic Hand)

Journal of Robotics and Mechatronics ◽

10.20965/jrm.1989.p0192 ◽

1989 ◽

Vol 1 (3) ◽

pp. 192-201

Author(s):

Yukio Saito ◽

◽

Takanori Higashihara ◽

Torn Oshima ◽

Takamitu Tajima ◽

...

Keyword(s):

Three Dimensional ◽

Coordinate Measuring Machine ◽

Automatic Measurement ◽

Surface Shape ◽

Human Hand ◽

Shape Processing ◽

Soft Objects ◽

Cad Cam ◽

Measuring Machine ◽

Three Dimensional Coordinate

The purpose of this research was to develop a CAD/ CAM system for soft objects such as the human hand. In this article are described the various steps in this process, including digitization of the shape by automatic measurement of the object shape processing such as shape interpolation and correction, additional shape processing, motion simulation for the digitized soft model, and reproduction of the shape as a positive model. As an example, we established a method for making a new cosmetic hand that could meet the necessary requirements of shape and functionality. For the shape, we measured the natural hand of a disabled person automatically with a three-dimensional coordinate measuring machine, performed data processing, and produced a positive model for the cosmetic hand. For functionality, we simulated the change of surface shape caused by finger motion using the shape of the measured hand, and then developed the inside mechanism of the cosmetic hand. This article describes the system developed for application to the cosmetic hand.

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Integrated Environment for PDM, RE and CAD/ CAM System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.130-134.491 ◽

2011 ◽

Vol 130-134 ◽

pp. 491-494 ◽

Cited By ~ 1

Author(s):

Yi Fei Tong ◽

Yi Chun Yang ◽

Hao Tian ◽

Dong Bo Li

Keyword(s):

Functional Model ◽

Coordinate Measuring Machine ◽

Original Data ◽

Geometric Information ◽

Engineering Software ◽

Cad System ◽

Integrated Environment ◽

Reconstructed Surfaces ◽

Cad Cam ◽

Measuring Machine

Functional model for realizing the data integration of product data management, reverse engineering software and CAD/CAM system is proposed to support digitized prototyping and shorten the time market of new product. Measured data from CMM (Coordinate Measuring Machine), describing the geometric information of product would be sent directly to RE software. After refining and smoothing the “data cloud”, meshes of curves would be generated and sent to CAD/CAM system. The original data will be overlaid onto NURBS model obtained from CAD system to verify the reconstructed surfaces. The CAD model may be further faired, analyzed or NC machined within the context of current CAD/CAM system. Feasibility of such an approach has been testified on a sample part.

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The Data Acquisition, Process and Reconstruction for a Reverse Engineering Study

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.267.1027 ◽

2011 ◽

Vol 267 ◽

pp. 1027-1031

Author(s):

Dong Man Yu ◽

Bao Zhong Qu ◽

Zhi Hua Gao ◽

Di Wang

Keyword(s):

Data Acquisition ◽

Technology Use ◽

Design Method ◽

Coordinate Measuring Machine ◽

Measuring Method ◽

Production Model ◽

Measurement Technology ◽

Cad Cam ◽

Measuring Machine ◽

Application Fields

As a modern design method that contrary to traditional design, RE technology use of special measuring apparatus to get dimensional data and enables one to start a design from an existing production model by combining computer technology, measurement technology and CAD/CAM technology. Firstly, The author has list the important application fields of RE technology, and then divided the RE process into four steps and described the detailed working flowchart. The data acquisition procedure includes datum-points creation and model measurement. For the threedimensional coordinate measuring machine, a contact measurement, the measuring method and working principal is deep discussed. As to the acquired data, the data processing should also be operated to meet the technique requirement, which consists of data splicing, noise eliminating, data interpolating, data smoothing and data filtering. Finally, the author summarized the surface reconstruction technology with the well data and assumed the RE technology will have more extensively application in mechanical fields.

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Utilization of CAD/CAM System Edgecam in Programming of CNC Milling Machine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.808.280 ◽

2015 ◽

Vol 808 ◽

pp. 280-285

Author(s):

Nadežda Čuboňová

Keyword(s):

Complex Shape ◽

Machining Process ◽

Milling Machine ◽

Cnc Milling ◽

Tool Paths ◽

Cnc Milling Machine ◽

Cad Cam ◽

Technological Documentation ◽

Design Proposal ◽

Cam Systems

Today's modern production already not does without sophisticated CAD/CAM system. The present CAD/CAM systems integrate part modelling and engineering design, proposal of technological documentation in the form of NC programs and operational management of production within a one computer system. Their utilization allows the programmer to create machining technology, to define the tool paths and to generate NC programs for very complex shape parts. The article focuses on the use of CAD/CAM system Edgecam, in the formation of the machining process for a milling Machine Emco Concept Mill (CM) 105. It describes the creation of postprocessor for Sinumerik 840D control system and its application and verifying in the production of specific components.

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