New inspection planning strategy for sculptured surfaces using coordinate measuring machine

Cho, Myeong-Woo; Kim, K.

doi:10.1080/00207549508930158

Cited by 54 publications

(17 citation statements)

References 2 publications

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“…They studied the relation between the form error and the sampling algorithm and the fitting algorithm used to fit the substitute geometry. Cho and Kim [13] developed an inspection planning strategy for sculptured surfaces using a coordinate measuring machine (CMM). They determined the optimum measuring point locations based on the mean curvature analysis and a region selection ratio constant.…”

Section: Sampling Strategiesmentioning

confidence: 99%

Intelligent Sampling for Inspecting Cylindrical Surfaces

Obeidat¹,

Mandahawi²,

Fouad³

et al. 2013

AISS

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The goal of our research is to reduce the nember of inspection points for cylinders and bell shapes while maintaning almost the same tolerance zone, so the time and cost is reduced. According to Cantilever Beam Theory that states the maximum deflection on the cylinder being machined using lathe machine, occurs at the free end of the cylinder. Hence the maximum dimensional eror can be expected to be at the free end of the cylinder being machined. A big reduction in the number of the inspection points has been achieved. It reached, in cylinders, to about 74.9 % with a difference in a tolerance zone of 3.7%. A big reduction, also, has been achieved in sampling bill shapes. It reached to about 66.75 % with a difference in a tolerance zone of 1.6%. So number of inspection points can be expected to be maximum at that region. The same thing can be said for the maximum deflection of the cutter used in cutting the bell shape. The cutter deflection will be maximum at the free end of the cutter, so maximum dimensional error can be expected to be at the bottom of the bell shape. Hence the sampling points are expected to be dense close to that region.

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Section: Sampling Strategiesmentioning

confidence: 99%

Intelligent Sampling for Inspecting Cylindrical Surfaces

Obeidat¹,

Mandahawi²,

Fouad³

et al. 2013

AISS

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“…To determine the measuring point locations on the target surfaces, the equi-interval sampling, random sampling, stratified sampling and hybrid sampling methods [8,9] were proposed. In this research, Hammersley's algorithm is applied to determine Fig.…”

Section: Measuring Points Locationsmentioning

confidence: 99%

A feature-based inspection planning system for coordinate measuring machines

Cho

Lee

Yoon

et al. 2005

Int J Adv Manuf Technol

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A feature-based inspection planning system is proposed in this research to develop more efficient measuring methodology for a CMM for complicated workpieces having many primitive form features. The proposed strategy is composed of two stages; global inspection planning and local inspection planning stages. In the global inspection planning stage, the system generates an optimum inspection sequence of the features in a part. The sequence is determined by analyzing the feature information such as the nested relations and the possible probe approach directions of the features, and by forming feature groups. A series of heuristic rules are developed to accomplish it. In the local inspection planning stage, each feature is decomposed into its constituent geometric elements, and then the number of sampling points, the locations of the points and the optimum probing sequence are determined. Also, an effective collision avoidance methodology is proposed. After required simulation, the effectiveness of the proposed system is verified.

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“…However, the equi-interval grid pattern measurement may result in an insu cient sampling when there are sharp changes in surface curvatures, or may cause unnecessary samples in a relatively¯at region. Therefore, the measuring points were selected based on the mean curvature analysis of the surface in this study (Cho and Kim 1995). In this study, 200 measuring points were selected as shown in ®gure 6.…”

Section: Database For Inspectionmentioning

confidence: 99%

Computer-aided design, manufacturing and inspection system integration for optical lens production

Cho¹,

Cho²,

Kim³

2002

International Journal of Production Research

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The main objectives of this research are the development of an integrated manufacturing strategy and the construction of a database management system for the design, machining and inspection of sculptured surfaces. Speci®cally, the optical lens for colour display tube/colour picture tube is selected as an application example to show the e ectiveness and e ciency of the developed manufacturing strategy and database construction methods. In the machining strategy, the total machining time reduction method is proposed for the rough cutting operation based on the optimum tool path planning. In the ®nish cutting operation, a modi®ed cutter contact variable step method is employed, and optimal tool paths are generated by selecting the proper tool radius within the given tolerance of a designed model. In the inspection strategy, the shortest measuring path is calculated to reduce the inspection time in CMM. In addition, an e cient database management system, which conducts the process from the surface design stage to the inspection result analysis stage, is constructed for the optimization of the sculptured surface manufacturing process. Finally, the required simulation and experimental works are carried out to verify the proposed strategy. IntroductionThe design of manufactured products is a process that has been changing rapidly, and new product designs tend to be more aerodynamic and sophisticated. These design shapes, called sculptured surfaces, are found in a wide range of products, such as automobile bodies, mould cavities and stamping dies. Therefore, the design and manufacturing of sculptured surfaces with a short lead-time, high accuracy, and reduced cost is of utmost importance to manufacturers.In the manufacturing of sculptured surfaces, there are many steps involved, such as design, rough cutting, semi-®nish cutting, ®nish cutting and inspection. Since the necessary information involved in the di erent stages is related to that is the other stages, the right information should be connected to the right place to achieve an e ective manufacturing process. For example, the tolerance of the ®nal product is directly related to the cutting allowance and tolerance through the variable steps in the cutting processes. Thus, by considering the allowance and tolerance, appropriate tools in each cutting step should be selected in order to reduce the necessary cutting steps and to save total machining time. In addition, the total machining time should be estimated by considering depth-of-cut, feed-rate and height of layers with the

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New inspection planning strategy for sculptured surfaces using coordinate measuring machine

Cited by 54 publications

References 2 publications

Intelligent Sampling for Inspecting Cylindrical Surfaces

Intelligent Sampling for Inspecting Cylindrical Surfaces

A feature-based inspection planning system for coordinate measuring machines

Computer-aided design, manufacturing and inspection system integration for optical lens production

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