David Burian, Petr Chvojka, Jiri Drobilek
Over the last years a gradual but nevertheless sustained increase in the production of machine tool spindles can be observed, especially for the needs of the automotive as well as aerospace industry. Along with this trend an increasing demand for maximum precision of spindles as well as their long-term reliability is evident. It is therefore necessary for the producers and users of these machines to monitor the quality of spindles. As for the producers, it is paramount that they manufacture products of high quality and in this way minimize both the financial loss incurred by complaints from...
TC14 ISMQC 2013
· TC14
· 2013
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Bartosz Gapinski, Andrzej Kolodziej
Shafts and holes are the most common elements in the construction of machines. Their mating creates the sets for various purposes, but in most cases these elements create responsible couplings, e.g. mating surfaces with the bearing friction, surfaces of mounting bearings, positioning dowels of elements, pair of piston – cylinder, etc. Control of circle parameters - outside ones on a shaft or internal ones in a hole, is one of the most common tasks in metrology of geometrical quantities. Measurement of diameter and roundness deviation could be conducted using wide range of measuring devices...
TC14 ISMQC 2013
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· 2013
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Ismail Bogrekci, Pinar Demircioglu, Yunus Cerci, Coskun Deniz, Numan M. Durakbasa
In this study, roughness measurement verification was conducted using wavelet transform for the surface structures produced by different manufacturing techniques. These are surface grinding, front milling and face turning. After manufacturing, the surface roughness values were measured by means of stylus profilometer as contact measurement technique. Then, manufactured surface images were captured and inspected by 3D digital microscope. The captured images were then pre-processed using high pass filter in order to enhance the image before further image analyses conducted. Discrete Wavelet...
TC14 ISMQC 2013
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· 2013
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Pinar Demircioglu, Ismail Bogrekci, Yunus Cerci, Coskun Deniz, Gokcen Bas, Numan M. Durakbasa
Honing is required when the surface structure parameters of cylinder liners are varied critically. Wear and tear signs occur when cylinder liners of both 4-stroke, and 2-stroke engines are used extensively. Wear and tear is not evenly distributed. Most wears occur between the reversal points of the upper and lower piston rings. Scuffing marks are generally found where the upper piston ring changes its direction. When honing time approaches for most cylinder liners, oval shape of cylinder liners appears. In this study, images of cylinder liners with different surface topography were taken...
TC14 ISMQC 2013
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· 2013
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Halina Nieciag
The paper presents the part of ongoing validation studies involving the accuracy of software algorithms calculating Gaussian associated features. In studies the numerical simulation method Monte Carlo (MC) was applied due to the number and nature of the variables forming the result of coordinate measurements, as well as due to complex and multidimensional measurands. In the paper an attempt to investigate the possibility of improving the results obtained by MC method is described. The LHS (Latin Hypercube Latin) algorithm was elaborated as an alternative to simple sampling scheme of...
TC14 ISMQC 2013
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· 2013
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Marcin Krawczyk, Adam Gaska, Jerzy Sladek
Today many different systems are working in accordance with the idea of coordinate measuring technique. There is possibility of using the same measuring software with optical or contact coordinate systems as well as with a 3d scanners (structural or laser light). This gives the opportunity to use different measuring systems for the same tasks. Consequently, it is possible to build faster and more efficient techniques for controlling the production. For example: a fast check of car body production with 3d scanner systems and one per shift accurate measurement of the same element with...
TC14 ISMQC 2013
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· 2013
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Malgorzata Poniatowska
The paper presents a methodology of correcting systematic influence of machining processes on free-form surfaces. Such correction is performed off-line by introducing alterations compensating this influence to machining programmes. The effect of systematic influence of machining are deterministic deviations of surfaces. CAD models of these deviations, averaged for a number of surfaces machined under repeatable conditions, represent machining pattern models which serve as the basis for performing correction. The basis for developing such models, are surface deviations determined during...
TC14 ISMQC 2013
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· 2013
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Magdalena Dierig, Adam Hamrol, Agnieszka Kujawinska
The paper presents new procedure of methodology for statistical assessment of measurement systems variation (methodology known in the literature as Measurement Systems Analysis, MSA). This procedure allows for calculation and monitoring in real time (that is on-line) of measurement system (MS) characteristics which determine its usability for manufacturing process control. The presented solution pointed out the gap in process control, which consists in lack of methods for monitoring measurement processes in the on-line way. Their key point consists of taking samples that are also needed for...
TC14 ISMQC 2013
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· 2013
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Yunus Cerci, Pinar Demircioglu, Ismail Bogrekci, Coskun Deniz, Numan M. Durakbasa
This study represents a case study in thermal and wear analyses for cutting tools, and investigates a relation between temperature distribution and wear characteristic of the tool. This paper presents computer modeling of tool deformation and thermal load during machining using finite element method. The relationship between heat and wear was investigated using both numerical analyses and finite element method. The results from the thermal analyses indicated that maximum temperatures on the contact area ranged from 163 to 957.5 ºC for the uncoated tool while those ranged from 33.6 to 83.4 ºC...
TC14 ISMQC 2013
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· 2013
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Marta Torralba, José A. Yagüe-Fabra, José A. Albajez,
As a result of the progress in the multidisciplinary nanotechnology field the demand for precision positioning systems has sensibly increased in the last years. In this line, a novel two-dimensional moving nano-platform (NanoPla) is being designed. The set requirements of the initial prototype are not only high positioning accuracy and resolution but also long working range (50 × 50 mm), increasing the number of potential applications. The presented paper demonstrates an illustrative part of the complete state-of-art realized, justifying and concluding with an optimal positioning system....
TC14 ISMQC 2013
· TC14
· 2013
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