Sažetak: Rad prikazuje cjelokupni proces izrade prekretača paleta. Opisan je proces modeliranja, ... more Sažetak: Rad prikazuje cjelokupni proces izrade prekretača paleta. Opisan je proces modeliranja, pripreme i proces proizvodnje. Dijelovi su pripremani za obradu na strojevima upotrebom softvera CAD/CAM prateći pravila tehnologije obrade deformiranjem. Prikazanim postupkom proizvodnja se optimizirala, ubrzala, te je proces proizvodnje kontroliran u svim koracima. Modeliranje i simulacija izvršeni su pomoću softvera SolidWorks, a zatim je model
2017 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM), 2017
Tool condition monitoring is one of the key issues in mechanical micromachining for efficient man... more Tool condition monitoring is one of the key issues in mechanical micromachining for efficient manufacturing of the micro-parts in several industries. In the present study, a tool condition monitoring system for micro-drilling is developed using a tri-axial accelerometer, a data acquisition and signal processing module and an artificial neural network. Micro-drilling experiments were carried out on an austenitic stainless steel ((X5CrNi 18-10) workpiece with the 500 μm diameter micro-drill. A three-axis accelerometer was installed on a sensor plate attached to the workpiece to collect vibration signals in three directions during drilling. The time domain “root mean square” feature representing changes in tool wear was estimated for vibration signals of all three directions. The variations of the rms micro-drilling vibrations were investigated with the increasing number of holes under different cutting conditions. An artificial neural network (ANN) model was developed to fuse the rms values of all three directional vibration signals, the spindle speed and feed parameters to predict the drilled hole number. The predicted drilled hole number obtained with the ANN model is in good agreement with the experimentally obtained drilled hole number. It has been also shown that the error of hole number prediction obtained by the neural network model is less than that obtained by using the regression model.
Contour parallel milling strategy is still widely used in 2.5D roughing operations. However, in t... more Contour parallel milling strategy is still widely used in 2.5D roughing operations. However, in the case of equidistant tool paths, the tool load strongly depends on the contour’s shape. The paper presents how the cutter engagement can be determined for different contour milling conditions to describe the interaction between the workpiece and the milling tool. Kivonat A 2.5D-s nagyolasi műveleteknel napjainkban is elterjedten hasznaljak a konturparhuzamos marasi strategiat. Az egyenkozű szerszampalyak eseten azonban a szerszam terhelese erősen fugg a kontur alakjatol. A cikkben bemutatjuk, hogy kulonboző konturmarasi viszonyok eseten hogyan irhato le a munkadarab es a szerszam kapcsolodasi viszonyait jellemző kontaktszog erteke.
The International Journal of Advanced Manufacturing Technology, 2020
In the case of 2.5D rough milling operations, machining efficiency can significantly be increased... more In the case of 2.5D rough milling operations, machining efficiency can significantly be increased by providing a uniform tool load. This is underpinned by the fact that uniform load has a positive effect on both tool life and machining time. Unfortunately, conventional contour-parallel tool paths are unable to guarantee uniform tool loads. However, nowadays there are some advanced path generation methods which can offer a constant tool load by controlling the cutter engagement angle. Yet, the spread of these non-equidistant offsetting methods is hindered by their dependence on complex calculations. As a solution to this problem, the Fast Constant Engagement Offsetting Method (FACEOM), developed in the scope of our previous study, is seen to be taking a step towards reducing computational needs. In this paper, suggestions for further improvements of FACEOM are presented. Decreasing the number of path points to be calculated is made possible by implementing adaptive step size and spli...
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2018
Many applications are available for the syntactic and semantic verification of NC milling tool pa... more Many applications are available for the syntactic and semantic verification of NC milling tool paths in simulation environments. However, these solutions – similar to the conventional tool path generation methods – are generally based on geometric considerations, and for that reason they cannot address varying cutting conditions. This paper introduces a new application of a simulation algorithm that is capable of producing all the necessary geometric information about the machining process in question for the purpose of further technological analysis. For performing such an analysis, an image space-based NC simulation algorithm is recommended, since in the case of complex tool paths it is impossible to provide an analytical description of the process of material removal. The information obtained from the simulation can be used not only for simple analyses, but also for optimisation purposes with a view to increasing machining efficiency.
ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)
ABSTRACT The paper presents a realized automated quality assurance system for the final assembly ... more ABSTRACT The paper presents a realized automated quality assurance system for the final assembly of a magnetic valve. The realization project joined to an international research project sponsored by the European Union however the quality assurance was not in the frame of that project. The system includes: (1) the supervision of the assembly cell and operations; (2) the functional test of the assembled valve; and (3) the automatic documentation and part following system. For realizing the aforementioned three components the original concept was worked out, the necessary design and plan were completed, the hardware and sensors were produced or installed, and the software was programmed. In the realization we had to consider the previously realized assembly cell, some economical constraints and the restrictions of the quality standard. The realized system has a close connection with the actual assembly process but the concept and the solution of the components can be applied generally after some not significant modification
ABSTRACT This study was carried out to establish the feasibility of the Fourier analysis and fuzz... more ABSTRACT This study was carried out to establish the feasibility of the Fourier analysis and fuzzy logic for tool and process monitoring of a milling operation. The dynamics of the measured cutting force component and vibration of a milling machine is investigated to establish the response of the signal variations due to tool wear, tool breakage, entering, exit, harder workpiece material, hole in workpiece, etc. A lot of experiments have already been performed to develop a commercially viable monitoring/diagnostic system for milling and the experiments continue.
... between the European manufacturing industry and research initiatives (regional and Commission... more ... between the European manufacturing industry and research initiatives (regional and CommissionRTD projects, EUREKA ... and agreed upon to allow the combination of results from market andapplication driven information ... Nanophased Particle Production and Functionalisation ...
Sažetak: Rad prikazuje cjelokupni proces izrade prekretača paleta. Opisan je proces modeliranja, ... more Sažetak: Rad prikazuje cjelokupni proces izrade prekretača paleta. Opisan je proces modeliranja, pripreme i proces proizvodnje. Dijelovi su pripremani za obradu na strojevima upotrebom softvera CAD/CAM prateći pravila tehnologije obrade deformiranjem. Prikazanim postupkom proizvodnja se optimizirala, ubrzala, te je proces proizvodnje kontroliran u svim koracima. Modeliranje i simulacija izvršeni su pomoću softvera SolidWorks, a zatim je model
2017 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM), 2017
Tool condition monitoring is one of the key issues in mechanical micromachining for efficient man... more Tool condition monitoring is one of the key issues in mechanical micromachining for efficient manufacturing of the micro-parts in several industries. In the present study, a tool condition monitoring system for micro-drilling is developed using a tri-axial accelerometer, a data acquisition and signal processing module and an artificial neural network. Micro-drilling experiments were carried out on an austenitic stainless steel ((X5CrNi 18-10) workpiece with the 500 μm diameter micro-drill. A three-axis accelerometer was installed on a sensor plate attached to the workpiece to collect vibration signals in three directions during drilling. The time domain “root mean square” feature representing changes in tool wear was estimated for vibration signals of all three directions. The variations of the rms micro-drilling vibrations were investigated with the increasing number of holes under different cutting conditions. An artificial neural network (ANN) model was developed to fuse the rms values of all three directional vibration signals, the spindle speed and feed parameters to predict the drilled hole number. The predicted drilled hole number obtained with the ANN model is in good agreement with the experimentally obtained drilled hole number. It has been also shown that the error of hole number prediction obtained by the neural network model is less than that obtained by using the regression model.
Contour parallel milling strategy is still widely used in 2.5D roughing operations. However, in t... more Contour parallel milling strategy is still widely used in 2.5D roughing operations. However, in the case of equidistant tool paths, the tool load strongly depends on the contour’s shape. The paper presents how the cutter engagement can be determined for different contour milling conditions to describe the interaction between the workpiece and the milling tool. Kivonat A 2.5D-s nagyolasi műveleteknel napjainkban is elterjedten hasznaljak a konturparhuzamos marasi strategiat. Az egyenkozű szerszampalyak eseten azonban a szerszam terhelese erősen fugg a kontur alakjatol. A cikkben bemutatjuk, hogy kulonboző konturmarasi viszonyok eseten hogyan irhato le a munkadarab es a szerszam kapcsolodasi viszonyait jellemző kontaktszog erteke.
The International Journal of Advanced Manufacturing Technology, 2020
In the case of 2.5D rough milling operations, machining efficiency can significantly be increased... more In the case of 2.5D rough milling operations, machining efficiency can significantly be increased by providing a uniform tool load. This is underpinned by the fact that uniform load has a positive effect on both tool life and machining time. Unfortunately, conventional contour-parallel tool paths are unable to guarantee uniform tool loads. However, nowadays there are some advanced path generation methods which can offer a constant tool load by controlling the cutter engagement angle. Yet, the spread of these non-equidistant offsetting methods is hindered by their dependence on complex calculations. As a solution to this problem, the Fast Constant Engagement Offsetting Method (FACEOM), developed in the scope of our previous study, is seen to be taking a step towards reducing computational needs. In this paper, suggestions for further improvements of FACEOM are presented. Decreasing the number of path points to be calculated is made possible by implementing adaptive step size and spli...
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2018
Many applications are available for the syntactic and semantic verification of NC milling tool pa... more Many applications are available for the syntactic and semantic verification of NC milling tool paths in simulation environments. However, these solutions – similar to the conventional tool path generation methods – are generally based on geometric considerations, and for that reason they cannot address varying cutting conditions. This paper introduces a new application of a simulation algorithm that is capable of producing all the necessary geometric information about the machining process in question for the purpose of further technological analysis. For performing such an analysis, an image space-based NC simulation algorithm is recommended, since in the case of complex tool paths it is impossible to provide an analytical description of the process of material removal. The information obtained from the simulation can be used not only for simple analyses, but also for optimisation purposes with a view to increasing machining efficiency.
ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)
ABSTRACT The paper presents a realized automated quality assurance system for the final assembly ... more ABSTRACT The paper presents a realized automated quality assurance system for the final assembly of a magnetic valve. The realization project joined to an international research project sponsored by the European Union however the quality assurance was not in the frame of that project. The system includes: (1) the supervision of the assembly cell and operations; (2) the functional test of the assembled valve; and (3) the automatic documentation and part following system. For realizing the aforementioned three components the original concept was worked out, the necessary design and plan were completed, the hardware and sensors were produced or installed, and the software was programmed. In the realization we had to consider the previously realized assembly cell, some economical constraints and the restrictions of the quality standard. The realized system has a close connection with the actual assembly process but the concept and the solution of the components can be applied generally after some not significant modification
ABSTRACT This study was carried out to establish the feasibility of the Fourier analysis and fuzz... more ABSTRACT This study was carried out to establish the feasibility of the Fourier analysis and fuzzy logic for tool and process monitoring of a milling operation. The dynamics of the measured cutting force component and vibration of a milling machine is investigated to establish the response of the signal variations due to tool wear, tool breakage, entering, exit, harder workpiece material, hole in workpiece, etc. A lot of experiments have already been performed to develop a commercially viable monitoring/diagnostic system for milling and the experiments continue.
... between the European manufacturing industry and research initiatives (regional and Commission... more ... between the European manufacturing industry and research initiatives (regional and CommissionRTD projects, EUREKA ... and agreed upon to allow the combination of results from market andapplication driven information ... Nanophased Particle Production and Functionalisation ...
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