The primary objective of this paper is to find out whether we can use the quality cost model as a... more The primary objective of this paper is to find out whether we can use the quality cost model as a tool for visualizing the quality targets in the quality management using the quality costs. The analysis showed that a graphic interpretation of the quality costs model in the companies makes the quality targets “more visible” and “more representative”. The visualization of the quality costs model focuses the efforts of management to use the graphic interpretation of the quality costs for the purposes of visibility, monitoring, comparison with the quality targets at the company level, and beyond during negotiations.
This paper presents own developed research system for modeling of the metal machining process. Th... more This paper presents own developed research system for modeling of the metal machining process. The research system integrates measuring sensors and systems, computer interfacing devices, software and investigation methodologies in order to develop machining process models. Our own developed hardware and software solutions are part of the applied strategy for full control over the research measuring chain. The resulting machining empirical models are accompanied with uncertainty parameters in order to fit the criteria of application in Smart Machining Systems (SMS) and new manufacturing optimization techniques
A typical engineering surface consists of a range of spatial frequencies. The high frequency or s... more A typical engineering surface consists of a range of spatial frequencies. The high frequency or short wavelength components are referred to as roughness, the medium frequencies as waviness and low frequency components as form
The research in this paper contributes to the practical implementation of the Statistical Process... more The research in this paper contributes to the practical implementation of the Statistical Process Control (SPC), primarily in the serial production by selecting an appropriate variable control chart. The paper proposes a procedure algorithm where the deciding criteria used to select the variable control chart include: the data distribution type (whether an approximately normal distribution or not), the number of elements in the subgroup (n) for grouped data, the shift size value and the percentage difference between the shift size value and the mean value of the shifts calculated for each subgroup. The paper explains the proposed algorithm using examples with appropriately drawn control charts, which algorithm essentially represents an extension of the algorithm presented in ISO 7870-2:2013.
Scientific Letters of Rzeszow University of Technology - Mechanics, 2017
W pracy dokonano analizy rozkładu sił działających na ostrze skrawające w samoczynnych fazownikac... more W pracy dokonano analizy rozkładu sił działających na ostrze skrawające w samoczynnych fazownikach. W rozważaniach wzięto pod uwagę fazowniki z różnymi rodzajami sprężyn płaskich służących do napinania ostrza. Przedstawiono czynniki wpływające na charakterystyki podatnościowe sprężyn. Sprecyzowano wytyczne do doboru najkorzystniejszych wariantów sprężyn z punktu widzenia najkorzystniejszych warunków pracy fazowników. Zwrócono uwagę na zmiany sił, jakie działają na ostrze w różnych cyklach pracy fazownika. Wyznaczono wartości sił skrawania, jakie mogą wystąpić podczas kształtowania krawędzi przedmiotów. W analizach uwzględniano także działające siły odśrodkowe oraz zmianę sił od odkształceń sprężystych elementów napinających ostrze.
Advances in Production and Industrial Engineering, 2017
Risk management is one of the key project management processes performed in the initial project p... more Risk management is one of the key project management processes performed in the initial project planning. The risk management process includes many steps, described in the chapter. Claims management is one of the most important challenges in large projects and linked with many financial losses. In the research, all frequent claims are identified in a piping project. Probabilistic claims are evaluated by questionnaire aimed at calculation of probability percentage and also probability of success. In order to determine reliability of questionnaire, statistical test of internal consistency coefficient was applied. Result of the present study is to quantify claims in implementation phase of piping projects and finally by analysing cost effects. Difference between probability of final project cost before and after application of claim indicates a more accurate estimation of project cost given portions of claims for project; impact of claim on project success rate in this project is 8 %.
W pracy mierzono i analizowano krótkie nieperiodyczne profile chropowatości utworzone z jednego o... more W pracy mierzono i analizowano krótkie nieperiodyczne profile chropowatości utworzone z jednego odcinka elementarnego. Pomiarów chropowatości dokonywano za pomocą profilometru stykowego. W celu filtracji programowej profili pierwotnych za pomocą filtru c, zwiększono długość odcinka pomiarowego mierzonego profilu według zaleceń normy ISO/TS 16610-28:2010, uwzględniając takie metody jak: dopełnienie zerem, odbicie symetryczne względem linii oraz odbicie symetryczne względem punktu. Linie średnie profili pierwotnych zostały wyznaczone za pomocą programu Matlab, z wykorzystaniem filtru Gaussa. W ten sposób uzyskano różne profile chropowatości z jednego podstawowego profilu pierwotnego. Wartości parametrów chropowatości jakie otrzymano dla tak utworzonych profili oraz różnice między nimi przedstawiono w tabelach i zilustrowano graficznie. SŁOWA KLUCZOWE: profil pierwotny, profil chropowatości, parametry chropowatości, nieperiodyczne profile, end effects. In this paper are measured and analyzed short non-periodic primary profiles consist of one sampling length. The measurements were done using a contact (stylus) measuring system. In order to be realized c software-filtration on the primary profiles, evaluation length of the measured profile are extended according to the recommendations in the standard ISO/TS 16610-28:2010, ie pursuant methods: zero padding , line symmetrical reflection and point symmetrical reflection. The filter mean lines for primary open profiles are determined by software Matlab using the Gaussian weighting function. In this way we obtained different roughness profiles from one same primary profile. The values of the roughness parameters and their mutual differences are shown in tables and graphics.
This paper presents four approaches to the graphic interpretation of the quality costs structure ... more This paper presents four approaches to the graphic interpretation of the quality costs structure definition models: classical, modern, modified, and visionary approach. These give rise to theoretical graphic quality costs models and illustrate the relationship between the quality costs categories, as well as the relationship between the quality costs categories and the total quality costs and the quality level. The paper comparatively analyzes the underlying assumptions, existing knowledge, and principles characteristic of each approach. This contributes to the shaping of the quality costs categories curves and the overall quality cost curve in the theoretical models. The conducted analysis in the paper will enable forecasting the trend of development of theoretical graphic models and identification of potential stakeholders that contribute to changes in the structure and the behavior of the quality costs categories, and thus the behavior of the overall quality costs.
Application of statistical methods in quality improvement of molded parts is presented in this pa... more Application of statistical methods in quality improvement of molded parts is presented in this paper. Implementation of two stages of DMAIC improvement cycle in a pre-production process is analysed in detail. DOE method is performed to define nominal values of process parameters of injection molding process. A fractionfactorial design with a single central point is used. A linear mathematical model with included elements of secondorder interaction is defined. Finally, control stage is performed using prior defined nominal values. Process capability test is conducted in order to determine whether the process is capable of producing parts within specified tolerance field.
IOP Conference Series: Materials Science and Engineering, 2018
In this article an outlook is given of our and other recent approaches of research and representa... more In this article an outlook is given of our and other recent approaches of research and representation of the mathematical models of some physical phenomena that occur in the cutting process. The focus is on the mathematical power model reliability which can be evaluated by the uncertainty parameters based on all error contributors and presented along with the model. An algorithm is proposed for the recommended steps during experimental modelling of the cutting process and uncertainty estimation. The significance of certain errors sources from the measurement software, hardware and the cutting process itself is stressed.
The paper describes the origins of edge rounding of machine-cutting blades made of sintered carbi... more The paper describes the origins of edge rounding of machine-cutting blades made of sintered carbides. Various processing machines and abrasive materials used to smoothen the cutting edges are presented. Various methods of measurement of the edge radius are compared. Stressed are the possibilities of improvement of tool durability through the use of new finishing process technologies for tool working surfaces.
The origin of rounding cutting edges of machining blades made out of cemented carbides is present... more The origin of rounding cutting edges of machining blades made out of cemented carbides is presented. Various methods of cutting edge smoothing and rounding measurement are described. The impact of smoothing conditions on the intensity and effects of edge rounding is specified.
The properties of super-hard materials such as diamond and regular boron nitride, and their appli... more The properties of super-hard materials such as diamond and regular boron nitride, and their application on cutting blades. Discussed are examples of blade tools from these materials in the aspects of production process efficiency and economical advantages gained by using these tools. The first part of the article deals with materials and tools with diamond blades and the other – with the blades of a regular boron nitride.
This paper presents an approach of empirical modeling of cutting process physical phenomena with ... more This paper presents an approach of empirical modeling of cutting process physical phenomena with measurement uncertainty parameters accompanied to the model exponents/ /coefficients. The approach is presented trough an example of creating a power mathematical model for average cutting temperature in turning with details about the uncertainty contributions from different experimental plans. The approach is proposed to be implemented as usual practice during empirical modeling, in order the resulting models to fit with the needs of the smart machining systems and the needs of interoperability between researchers.
This paper presents the theoretical aspects taken into account when creating an algorithm for a q... more This paper presents the theoretical aspects taken into account when creating an algorithm for a quality costs measurement system, developed using a descriptive-analytical method. The methodological approach relies on the systemic thinking about management of success, including the elements of integration, innovation and agility, taken into account when developing the scope, rules, criteria, possibilities and alternatives. The proposed algorithm provides a structured approach and systematic measurement of the quality costs, which, in turn provides for better understanding, detection and correction of the errors on the spot where they actually occurred and not where they appeared. This ensures the timeliness, accuracy and reliability of the data and information about the costs of quality, opens possibilities not only for diagnostic analytics but also for predictive and prescriptive analytics, which increases the efficiency of the company.
The properties of super-hard materials such as diamond and regular boron nitride, and their appli... more The properties of super-hard materials such as diamond and regular boron nitride, and their application on cutting blades. Discussed are examples of blade tools from these materials in the aspects of production process efficiency and economical advantages gained by using these tools. The first part of the article deals with materials and tools with diamond blades and the other – with the blades of a regular boron nitride.
This paper presents mathematical models for predicting the maximum height of roughness profile us... more This paper presents mathematical models for predicting the maximum height of roughness profile using a wiper insert. Identified are four characteristic cases that occur turning when used wiper insert geometry as a function of the feed f. It also notes several inconsistencies and differences regarding the definition of wiper insert geometry.
The primary objective of this paper is to find out whether we can use the quality cost model as a... more The primary objective of this paper is to find out whether we can use the quality cost model as a tool for visualizing the quality targets in the quality management using the quality costs. The analysis showed that a graphic interpretation of the quality costs model in the companies makes the quality targets “more visible” and “more representative”. The visualization of the quality costs model focuses the efforts of management to use the graphic interpretation of the quality costs for the purposes of visibility, monitoring, comparison with the quality targets at the company level, and beyond during negotiations.
This paper presents own developed research system for modeling of the metal machining process. Th... more This paper presents own developed research system for modeling of the metal machining process. The research system integrates measuring sensors and systems, computer interfacing devices, software and investigation methodologies in order to develop machining process models. Our own developed hardware and software solutions are part of the applied strategy for full control over the research measuring chain. The resulting machining empirical models are accompanied with uncertainty parameters in order to fit the criteria of application in Smart Machining Systems (SMS) and new manufacturing optimization techniques
A typical engineering surface consists of a range of spatial frequencies. The high frequency or s... more A typical engineering surface consists of a range of spatial frequencies. The high frequency or short wavelength components are referred to as roughness, the medium frequencies as waviness and low frequency components as form
The research in this paper contributes to the practical implementation of the Statistical Process... more The research in this paper contributes to the practical implementation of the Statistical Process Control (SPC), primarily in the serial production by selecting an appropriate variable control chart. The paper proposes a procedure algorithm where the deciding criteria used to select the variable control chart include: the data distribution type (whether an approximately normal distribution or not), the number of elements in the subgroup (n) for grouped data, the shift size value and the percentage difference between the shift size value and the mean value of the shifts calculated for each subgroup. The paper explains the proposed algorithm using examples with appropriately drawn control charts, which algorithm essentially represents an extension of the algorithm presented in ISO 7870-2:2013.
Scientific Letters of Rzeszow University of Technology - Mechanics, 2017
W pracy dokonano analizy rozkładu sił działających na ostrze skrawające w samoczynnych fazownikac... more W pracy dokonano analizy rozkładu sił działających na ostrze skrawające w samoczynnych fazownikach. W rozważaniach wzięto pod uwagę fazowniki z różnymi rodzajami sprężyn płaskich służących do napinania ostrza. Przedstawiono czynniki wpływające na charakterystyki podatnościowe sprężyn. Sprecyzowano wytyczne do doboru najkorzystniejszych wariantów sprężyn z punktu widzenia najkorzystniejszych warunków pracy fazowników. Zwrócono uwagę na zmiany sił, jakie działają na ostrze w różnych cyklach pracy fazownika. Wyznaczono wartości sił skrawania, jakie mogą wystąpić podczas kształtowania krawędzi przedmiotów. W analizach uwzględniano także działające siły odśrodkowe oraz zmianę sił od odkształceń sprężystych elementów napinających ostrze.
Advances in Production and Industrial Engineering, 2017
Risk management is one of the key project management processes performed in the initial project p... more Risk management is one of the key project management processes performed in the initial project planning. The risk management process includes many steps, described in the chapter. Claims management is one of the most important challenges in large projects and linked with many financial losses. In the research, all frequent claims are identified in a piping project. Probabilistic claims are evaluated by questionnaire aimed at calculation of probability percentage and also probability of success. In order to determine reliability of questionnaire, statistical test of internal consistency coefficient was applied. Result of the present study is to quantify claims in implementation phase of piping projects and finally by analysing cost effects. Difference between probability of final project cost before and after application of claim indicates a more accurate estimation of project cost given portions of claims for project; impact of claim on project success rate in this project is 8 %.
W pracy mierzono i analizowano krótkie nieperiodyczne profile chropowatości utworzone z jednego o... more W pracy mierzono i analizowano krótkie nieperiodyczne profile chropowatości utworzone z jednego odcinka elementarnego. Pomiarów chropowatości dokonywano za pomocą profilometru stykowego. W celu filtracji programowej profili pierwotnych za pomocą filtru c, zwiększono długość odcinka pomiarowego mierzonego profilu według zaleceń normy ISO/TS 16610-28:2010, uwzględniając takie metody jak: dopełnienie zerem, odbicie symetryczne względem linii oraz odbicie symetryczne względem punktu. Linie średnie profili pierwotnych zostały wyznaczone za pomocą programu Matlab, z wykorzystaniem filtru Gaussa. W ten sposób uzyskano różne profile chropowatości z jednego podstawowego profilu pierwotnego. Wartości parametrów chropowatości jakie otrzymano dla tak utworzonych profili oraz różnice między nimi przedstawiono w tabelach i zilustrowano graficznie. SŁOWA KLUCZOWE: profil pierwotny, profil chropowatości, parametry chropowatości, nieperiodyczne profile, end effects. In this paper are measured and analyzed short non-periodic primary profiles consist of one sampling length. The measurements were done using a contact (stylus) measuring system. In order to be realized c software-filtration on the primary profiles, evaluation length of the measured profile are extended according to the recommendations in the standard ISO/TS 16610-28:2010, ie pursuant methods: zero padding , line symmetrical reflection and point symmetrical reflection. The filter mean lines for primary open profiles are determined by software Matlab using the Gaussian weighting function. In this way we obtained different roughness profiles from one same primary profile. The values of the roughness parameters and their mutual differences are shown in tables and graphics.
This paper presents four approaches to the graphic interpretation of the quality costs structure ... more This paper presents four approaches to the graphic interpretation of the quality costs structure definition models: classical, modern, modified, and visionary approach. These give rise to theoretical graphic quality costs models and illustrate the relationship between the quality costs categories, as well as the relationship between the quality costs categories and the total quality costs and the quality level. The paper comparatively analyzes the underlying assumptions, existing knowledge, and principles characteristic of each approach. This contributes to the shaping of the quality costs categories curves and the overall quality cost curve in the theoretical models. The conducted analysis in the paper will enable forecasting the trend of development of theoretical graphic models and identification of potential stakeholders that contribute to changes in the structure and the behavior of the quality costs categories, and thus the behavior of the overall quality costs.
Application of statistical methods in quality improvement of molded parts is presented in this pa... more Application of statistical methods in quality improvement of molded parts is presented in this paper. Implementation of two stages of DMAIC improvement cycle in a pre-production process is analysed in detail. DOE method is performed to define nominal values of process parameters of injection molding process. A fractionfactorial design with a single central point is used. A linear mathematical model with included elements of secondorder interaction is defined. Finally, control stage is performed using prior defined nominal values. Process capability test is conducted in order to determine whether the process is capable of producing parts within specified tolerance field.
IOP Conference Series: Materials Science and Engineering, 2018
In this article an outlook is given of our and other recent approaches of research and representa... more In this article an outlook is given of our and other recent approaches of research and representation of the mathematical models of some physical phenomena that occur in the cutting process. The focus is on the mathematical power model reliability which can be evaluated by the uncertainty parameters based on all error contributors and presented along with the model. An algorithm is proposed for the recommended steps during experimental modelling of the cutting process and uncertainty estimation. The significance of certain errors sources from the measurement software, hardware and the cutting process itself is stressed.
The paper describes the origins of edge rounding of machine-cutting blades made of sintered carbi... more The paper describes the origins of edge rounding of machine-cutting blades made of sintered carbides. Various processing machines and abrasive materials used to smoothen the cutting edges are presented. Various methods of measurement of the edge radius are compared. Stressed are the possibilities of improvement of tool durability through the use of new finishing process technologies for tool working surfaces.
The origin of rounding cutting edges of machining blades made out of cemented carbides is present... more The origin of rounding cutting edges of machining blades made out of cemented carbides is presented. Various methods of cutting edge smoothing and rounding measurement are described. The impact of smoothing conditions on the intensity and effects of edge rounding is specified.
The properties of super-hard materials such as diamond and regular boron nitride, and their appli... more The properties of super-hard materials such as diamond and regular boron nitride, and their application on cutting blades. Discussed are examples of blade tools from these materials in the aspects of production process efficiency and economical advantages gained by using these tools. The first part of the article deals with materials and tools with diamond blades and the other – with the blades of a regular boron nitride.
This paper presents an approach of empirical modeling of cutting process physical phenomena with ... more This paper presents an approach of empirical modeling of cutting process physical phenomena with measurement uncertainty parameters accompanied to the model exponents/ /coefficients. The approach is presented trough an example of creating a power mathematical model for average cutting temperature in turning with details about the uncertainty contributions from different experimental plans. The approach is proposed to be implemented as usual practice during empirical modeling, in order the resulting models to fit with the needs of the smart machining systems and the needs of interoperability between researchers.
This paper presents the theoretical aspects taken into account when creating an algorithm for a q... more This paper presents the theoretical aspects taken into account when creating an algorithm for a quality costs measurement system, developed using a descriptive-analytical method. The methodological approach relies on the systemic thinking about management of success, including the elements of integration, innovation and agility, taken into account when developing the scope, rules, criteria, possibilities and alternatives. The proposed algorithm provides a structured approach and systematic measurement of the quality costs, which, in turn provides for better understanding, detection and correction of the errors on the spot where they actually occurred and not where they appeared. This ensures the timeliness, accuracy and reliability of the data and information about the costs of quality, opens possibilities not only for diagnostic analytics but also for predictive and prescriptive analytics, which increases the efficiency of the company.
The properties of super-hard materials such as diamond and regular boron nitride, and their appli... more The properties of super-hard materials such as diamond and regular boron nitride, and their application on cutting blades. Discussed are examples of blade tools from these materials in the aspects of production process efficiency and economical advantages gained by using these tools. The first part of the article deals with materials and tools with diamond blades and the other – with the blades of a regular boron nitride.
This paper presents mathematical models for predicting the maximum height of roughness profile us... more This paper presents mathematical models for predicting the maximum height of roughness profile using a wiper insert. Identified are four characteristic cases that occur turning when used wiper insert geometry as a function of the feed f. It also notes several inconsistencies and differences regarding the definition of wiper insert geometry.
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