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Prof. Marcin Zastempowski
UTP University of Science and Technology in Bydgoszcz, Poland

Basic Info


Research Keywords & Expertise

0 cutting plant material
0 shredding plant material
0 cutting units of agricultural machines
0 mathematical modeling of cutting processes
0 new constructions of working units in agricultural machines

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cutting plant material
cutting units of agricultural machines
new constructions of working units in agricultural machines

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Short Biography

Scientific interests are within the field of mechanic engineering and concern the development of the theory of the cutting and shredding assemblies of working machines, and in particular: - application of the computer techniques in designing of the machines’ design and optimization; - mathematical modeling of the kinematics and dynamics of the machines’ working assemblies movement; - experimental studies on the new designs of working assemblies. The below may be considered to be the most important achievements in the scientific activity: - development and drawing up of the theory and design of the drum cutting assemblies used in chaff cutters; - development and drawing up of the theory and design of the shear-finger cutting assemblies used in chaff cutters, mowing machines and combine harvesters; - drawing up of the grounds of the theory and design of the beater shredders for grain materials;

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Journal article
Published: 01 May 2021 in Materials
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This paper describes experimental research on cutting the outer layer of onions in the machine peeling process. The authors’ own globally innovative modular machine construction was used for this purpose. The onion peeling machine was constructed on a real scale. The effectiveness of the machine’s functioning Se was defined as the ratio of the mass of material correctly removed by the scale blower mp to the mass of all material leaving the machine on the test bench mc. In order to carry out the experimental research, a test stand was constructed, a research plan and programme were adopted, and the research methodology was developed. The results obtained during the experimental research and the data obtained from the regression function equations for the developed design of the onion peeling machine were used to build systems of independent variables, for which the dependent variable Se reached extreme values. The effectiveness of the machine’s operation Se of modular construction increased with the increase in the depth of the external incisions of the shells dn, the number of scale-blowing nozzles, and the pressure of the air supply to the scale-blowing unit p. Increasing the material feed rate vp and the distance of the air nozzles from the material to be processed hd reduced the machine’s efficiency Se. The tests carried out showed a high level of efficiency on the level of Se=0.6450.780, which is not found in mass-produced machines.

ACS Style

Andrzej Bochat; Marcin Zastempowski; Marcin Wachowicz. Cutting Tests of the Outer Layer of Material Using Onion as an Example. Materials 2021, 14, 2360 .

AMA Style

Andrzej Bochat, Marcin Zastempowski, Marcin Wachowicz. Cutting Tests of the Outer Layer of Material Using Onion as an Example. Materials. 2021; 14 (9):2360.

Chicago/Turabian Style

Andrzej Bochat; Marcin Zastempowski; Marcin Wachowicz. 2021. "Cutting Tests of the Outer Layer of Material Using Onion as an Example." Materials 14, no. 9: 2360.

Journal article
Published: 01 March 2021 in Sustainability
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An analysis of construction was conducted in this study, and the guidelines for designing roller mills used commonly in the agri-food, chemical, power and construction industries were presented. Quick designing of the machines required existence of adequate mathematical models. Within the framework of the study’s realization, a mathematical model was developed and we presented the selected results of calculations of the milling rollers loading from the assembly’s mill bowl. The simulation calculations conducted with the mathematical model unambiguously show that the roller’s rotation around a fixed point considerably influences the total loading of the mill’s bowl, and passing over that phenomenon is a mistake.

ACS Style

Marcin Zastempowski; Andrzej Bochat; Lubomír Hujo. Selected Aspects of Modelling and Design Calculations of Roller Mills. Sustainability 2021, 13, 2595 .

AMA Style

Marcin Zastempowski, Andrzej Bochat, Lubomír Hujo. Selected Aspects of Modelling and Design Calculations of Roller Mills. Sustainability. 2021; 13 (5):2595.

Chicago/Turabian Style

Marcin Zastempowski; Andrzej Bochat; Lubomír Hujo. 2021. "Selected Aspects of Modelling and Design Calculations of Roller Mills." Sustainability 13, no. 5: 2595.

Research article
Published: 02 February 2021 in Measurement and Control
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The present article deals with the physical properties monitoring of the transmission-hydraulic fluid, and changes of those properties due the operating load of the hydraulic pump in laboratory conditions. Tests of the transmission-hydraulic fluid were performed in laboratory conditions with the simulation of the operating load, so as to simulate the real conditions under which hydraulic circuit of the agricultural tractors operates. The universal transmission-hydraulic fluid was subjected to analysis, where the samples of the fluid were taken sequentially according to the chosen methodology at intervals of 250 and 500 h. The results of the present article include the evaluation of the physical properties of the fluid and the flow efficiency change of the hydraulic pump after 250 and 500 h of operation, while simulating the operation load. Based on a laboratory test, we found that after working for 500 h, the dynamic viscosity of the examined hydraulic fluid at 40°C decreased by 2.92 mPa.s and at 100°C decreased by 0.64 mPa.s. When determining the kinematic viscosity of the hydraulic fluid after working for 500 h, we recorded its decrease, namely, at a temperature of 40°C by a value of 3.37 mm2/s and at a temperature of 100°C, its value decreased by 0.77 mm2/s. In the analysis of the test oil samples, we found that the level of water contamination of the hydraulic fluid decreases with increasing number of hours worked. Specifically, the water concentration in the hydraulic fluid decreased by 0.031%. At the same time, we recorded a slight decrease in the flow efficiency of the hydraulic pump, specifically by a value of 0.03% after 500 h worked. After working 500 h, we found that the range of abrasion particles in the transmission-hydraulic fluid is within the prescribed range, which is determined by the standard D6595-00.

ACS Style

Lubomir Hujo; Jozef Nosian; Marcin Zastempowski; Jan Kosiba; Jerzy Kaszkowiak; Matej Michalides. Laboratory tests of the hydraulic pump operating load with monitoring of changes in the physical properties. Measurement and Control 2021, 54, 243 -251.

AMA Style

Lubomir Hujo, Jozef Nosian, Marcin Zastempowski, Jan Kosiba, Jerzy Kaszkowiak, Matej Michalides. Laboratory tests of the hydraulic pump operating load with monitoring of changes in the physical properties. Measurement and Control. 2021; 54 (3-4):243-251.

Chicago/Turabian Style

Lubomir Hujo; Jozef Nosian; Marcin Zastempowski; Jan Kosiba; Jerzy Kaszkowiak; Matej Michalides. 2021. "Laboratory tests of the hydraulic pump operating load with monitoring of changes in the physical properties." Measurement and Control 54, no. 3-4: 243-251.

Journal article
Published: 29 January 2021 in Acta Technologica Agriculturae
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The article presented describes a new design of measuring chains in laboratory test equipment, which are used for testing the hydrostatic transducers and hydraulic fluids. Laboratory test equipment allows simultaneous observation of parameters of hydrostatic transducers and hydraulic fluids by simulating the operating conditions under laboratory conditions, what can significantly reduce the testing time and economic costs. The new design functionality was verified via measurement of the basic parameters of hydrostatic transducers and changing the load of hydraulic fluids. Based on the results measured, the flow efficiency of tested hydrostatic transducer UD-25R was calculated and compared with the transducer parameters specified by the manufacturer using different types of operating hydraulic fluids. Verification measurements of the unloaded hydrostatic transducer were performed at various rotation speeds: Q 250 = 5.694 dm3·rpm at speed of n 1 = 250 rpm; Q 500 = 12.286 dm3·rpm at speed of n 2 = 500 rpm; Q 750 = 18.747 dm3·rpm at speed of n 3 = 750 rpm. Based on the hydrostatic transducer flow rate, the UD-25R transducer flow efficiency was determined: at n 1 = 250 rpm, the flow efficiency was η250 = 0.8946; at n 2 = 500 rpm, the efficiency was η500 = 0.9651; at n 3 = 750 rpm, the flow efficiency was η750 = 0.9812.

ACS Style

Jozef Nosian; Ľubomír Hujo; Marcin Zastempowski; Romana Janoušková. Design of Laboratory Test Equipment for Testing the Hydrostatic Transducers. Acta Technologica Agriculturae 2021, 24, 35 -40.

AMA Style

Jozef Nosian, Ľubomír Hujo, Marcin Zastempowski, Romana Janoušková. Design of Laboratory Test Equipment for Testing the Hydrostatic Transducers. Acta Technologica Agriculturae. 2021; 24 (1):35-40.

Chicago/Turabian Style

Jozef Nosian; Ľubomír Hujo; Marcin Zastempowski; Romana Janoušková. 2021. "Design of Laboratory Test Equipment for Testing the Hydrostatic Transducers." Acta Technologica Agriculturae 24, no. 1: 35-40.

Journal article
Published: 06 January 2021 in Applied Sciences
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The main aim of the article is to present the design of laboratory test equipment, which is appropriate for monitoring the efficiency of oil filters and the system for evaluating the technical life of engine oils in terms of possible extension of service intervals. The functionality of the designed laboratory test equipment for the filtration of motor oils was verified by a practical experiment with a verification measurement and assessment of the suitability of the hydraulic circuit elements and the designed sensing equipment. The laboratory equipment enables the testing of oil filters with different filtration capacity during simultaneous testing in two separate hydraulic circuits with differently contaminated engine oil, while it enables laboratory measurements to be performed while simulating operating conditions.

ACS Style

Hujo Ľubomír; Jablonický Juraj; Markovič Jaromír; Tulík Juraj; Simikić Mirko; Zastempowski Marcin; Janoušková Romana. Design of Laboratory Test Equipment for Automotive Oil Filters to Evaluate the Technical Life of Engine Oil. Applied Sciences 2021, 11, 483 .

AMA Style

Hujo Ľubomír, Jablonický Juraj, Markovič Jaromír, Tulík Juraj, Simikić Mirko, Zastempowski Marcin, Janoušková Romana. Design of Laboratory Test Equipment for Automotive Oil Filters to Evaluate the Technical Life of Engine Oil. Applied Sciences. 2021; 11 (2):483.

Chicago/Turabian Style

Hujo Ľubomír; Jablonický Juraj; Markovič Jaromír; Tulík Juraj; Simikić Mirko; Zastempowski Marcin; Janoušková Romana. 2021. "Design of Laboratory Test Equipment for Automotive Oil Filters to Evaluate the Technical Life of Engine Oil." Applied Sciences 11, no. 2: 483.

Journal article
Published: 31 July 2020 in Sustainability
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Comparative studies of the classical and new design of a chaff cutter’s cutting drum have been conducted within the frames of the study in order to determine their functional characteristics at the time of cutting rye straw into pieces of specific length (into chaff). A classical design of a cutting drum is of the shape of a roller and is suitable for material layer cross-cutting. However, the new drum design has the shape of a double truncated cone and, with the use of it, diagonal cuts in two directions can be realized. The studies were conducted for four designs of cutting drums with cutting angles α = 0° (classical design) and α = 15°, α = 30°, and α = 45° (new design). Three indicators were applied for the assessment: capacity, unit energy consumption, and the unit cutting resistance. The obtained results show that the use of a new drum design makes it possible, depending on the assumed parameters of the cutting process and the material’s compaction degree, to increase the process’s efficiency by up to 25%, lower the unit energy consumption up to 34%, and lower the unit cutting resistance by up to 8%. The conducted experimental studies have unequivocally shown that the use of a new cutting drum design, as compared to the classical one, results in a considerable increase in the cutting process’s performance. Studies on the new design of a chaff cutter’s cutting drum, of the shape of a double truncated cone, belong to original ones that so far have not been described in the available literature.

ACS Style

Marcin Zastempowski; Andrzej Bochat. Research Issues in the Process of Cutting Straw into Pieces. Sustainability 2020, 12, 6167 .

AMA Style

Marcin Zastempowski, Andrzej Bochat. Research Issues in the Process of Cutting Straw into Pieces. Sustainability. 2020; 12 (15):6167.

Chicago/Turabian Style

Marcin Zastempowski; Andrzej Bochat. 2020. "Research Issues in the Process of Cutting Straw into Pieces." Sustainability 12, no. 15: 6167.

Journal article
Published: 05 March 2020 in PRZEMYSŁ CHEMICZNY
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ACS Style

Marcin Zastempowski. Wpływ konstrukcji i parametrów pracy bębnowych zespołów tnących na nierównomierność długości cięcia biomasy. PRZEMYSŁ CHEMICZNY 2020, 1, 139 -143.

AMA Style

Marcin Zastempowski. Wpływ konstrukcji i parametrów pracy bębnowych zespołów tnących na nierównomierność długości cięcia biomasy. PRZEMYSŁ CHEMICZNY. 2020; 1 (3):139-143.

Chicago/Turabian Style

Marcin Zastempowski. 2020. "Wpływ konstrukcji i parametrów pracy bębnowych zespołów tnących na nierównomierność długości cięcia biomasy." PRZEMYSŁ CHEMICZNY 1, no. 3: 139-143.

Journal article
Published: 20 February 2020 in Acta Technologica Agriculturae
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This paper discusses and calculates the impact of the gyroscopic effect on the increase in the agricultural machine working assemblies’ load on bearings of the chaff cutter type. This effect occurs under natural field operational conditions of this type of machine either during the change in direction of its movement or moving over irregular surface and is caused by a sudden change in the axis direction of quickly rotating masses. In a form of graph, there is a presentation of a mathematical model and exemplary results of simulation calculations for selected parameter values related to the movement and operation of machines with a high-speed drum. Calculations were conducted on the basis of analysis of technical data of working machines of the chaff cutter type. Conducted analysis of the agricultural machine working assemblies’ load on bearings showed that these loads may temporarily increase even by ten times in case of the machine turn and eight times in case of moving over irregular of surface, considerably influencing their lifetime.

ACS Style

Marcin Zastempowski; Andrzej Bochat. Gyroscopic Effect in Machine Working Assemblies. Acta Technologica Agriculturae 2020, 23, 24 -29.

AMA Style

Marcin Zastempowski, Andrzej Bochat. Gyroscopic Effect in Machine Working Assemblies. Acta Technologica Agriculturae. 2020; 23 (1):24-29.

Chicago/Turabian Style

Marcin Zastempowski; Andrzej Bochat. 2020. "Gyroscopic Effect in Machine Working Assemblies." Acta Technologica Agriculturae 23, no. 1: 24-29.

Journal article
Published: 01 January 2020 in Transactions of the ASABE
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HighlightsThis article presents test results of a new cutting drum design for an agricultural forage harvester.The energy consumption in the cutting process of rape decreased with increasing speed and cutting angle.Cutting the plant material layers with the new design of the cutting drum is more efficient and productive.Cross-cutting of plant material into chopped straw is an important alternative to the currently used cutting method. A comparative study of the classic design and a new design for the drum cutting assembly of a chaff cutter was conducted to determine the performance characteristics of both designs when cutting rape straw into defined lengths. The new design of the cutting drum made oblique cutting possible, which was not possible with the classic design. For assessment of the cutting process, two indicators were used: the effectiveness of the cutting process, and the unit energy consumption during the cutting process. The experimental results showed that the new design of the cutting drum resulted in a considerable increase in the effectiveness of cutting plant material into pieces, as compared to the classic design. Keywords: Chaff cutter, Cutting drum, Cutting of material layers, Cutting process effectiveness, Plant material.

ACS Style

Andrzej Bochat; Marcin Zastempowski. Comparative Study of Rape Straw Cutting with Two Drum Cutting Assemblies. Transactions of the ASABE 2020, 63, 345 -350.

AMA Style

Andrzej Bochat, Marcin Zastempowski. Comparative Study of Rape Straw Cutting with Two Drum Cutting Assemblies. Transactions of the ASABE. 2020; 63 (2):345-350.

Chicago/Turabian Style

Andrzej Bochat; Marcin Zastempowski. 2020. "Comparative Study of Rape Straw Cutting with Two Drum Cutting Assemblies." Transactions of the ASABE 63, no. 2: 345-350.

Conference paper
Published: 30 July 2018 in MATEC Web of Conferences
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Within the frames of the study's performance, the modeling attempt of the gran materials' shredding with the beater shredder was taken up. Modelling was conducted for two constructions of working shredder's assemblies, that is for a classical and a new one, developed by the study's authors. The classical construction is characterised by the fact, that it has beaters assembled to the rotor of a cuboid shape. However, the new construction, has beaters in the shape of a circular section. It results from the conducted shredding process' analysis, that the shape of the beaters has a crucial impact on the shredding output's increase at simultaneous decrease of the process' energy consumption. The developed kinematics and energy consumption models of the shredding process may be used at the phase of the beater shredders' designing for grain materials.

ACS Style

Andrzej Bochat; Marcin Zastempowski. Modelling of the grain materials ’shredding process for the purposes of the beater shredders’ designing. MATEC Web of Conferences 2018, 182, 02002 .

AMA Style

Andrzej Bochat, Marcin Zastempowski. Modelling of the grain materials ’shredding process for the purposes of the beater shredders’ designing. MATEC Web of Conferences. 2018; 182 ():02002.

Chicago/Turabian Style

Andrzej Bochat; Marcin Zastempowski. 2018. "Modelling of the grain materials ’shredding process for the purposes of the beater shredders’ designing." MATEC Web of Conferences 182, no. : 02002.

Book chapter
Published: 18 September 2016 in Springer Texts in Business and Economics
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The drum cutting assembly is the basic working assembly of self-propelled and fastened chaff cutters. The task of the drum cutting assembly is to cut plant material into parts of specified length—into chaff. Within the frames of the study’s realization, mathematical dependencies are making it possible to determine the relationships between the basic parameters and construction features of cutting drums in the aspects of kinematics, and dynamics of their movement in the phase of the cutting process have been drawn up. The developed dependencies may be used at the time of simulation calculations on new drum constructions of cutting assemblies and in the process of their operation process’ automation.

ACS Style

Marcin Zastempowski; Andrzej Bochat. Kinematics and Dynamics of the Drum Cutting Units. Springer Texts in Business and Economics 2016, 409 -421.

AMA Style

Marcin Zastempowski, Andrzej Bochat. Kinematics and Dynamics of the Drum Cutting Units. Springer Texts in Business and Economics. 2016; ():409-421.

Chicago/Turabian Style

Marcin Zastempowski; Andrzej Bochat. 2016. "Kinematics and Dynamics of the Drum Cutting Units." Springer Texts in Business and Economics , no. : 409-421.

Journal article
Published: 22 June 2015 in Transactions of the ASABE
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This article presents a research study aimed at determining the effect of selected hammer mill design features on the efficiency of grinding cereal grain. For the purpose of the study, a test stand was developed and constructed to test the influence of the selected mill design features on the efficiency of grinding triticale. The study was conducted with modern measurement equipment consisting of a torque meter with tachometer (MIR-20) and a two-channel meter (MW2006-4) connected to a PC computer. Recording of the measured values was carried out using the program PP203. The tested designs of the hammer mill differed mostly in the shape of the hammers. A characteristic shape indicator was the hammer angle (α). In the experiment, the design of a standard rotor (α = 0°) was compared to a new design (α = 35°, 45°, and 55°). Statistical analysis of the experimental results was carried out using self-developed software (Statistica Trial 10). The statistical analysis revealed that the new design of the rotor is more efficient than the commonly used traditional design and can bring significant economic and technological benefits. The results obtained from this study of grinding triticale using hammers with the shape of a circle section, hitherto unknown in the literature, are a valuable contribution to the theory of grinding. They can provide a basis for further research concerning hammer mills.

ACS Style

Andrzej Bochat; Leszek Wesolowski; Marcin Zastempowski. A Comparative Study of New and Traditional Designs of a Hammer Mill. Transactions of the ASABE 2015, 58, 585 -596.

AMA Style

Andrzej Bochat, Leszek Wesolowski, Marcin Zastempowski. A Comparative Study of New and Traditional Designs of a Hammer Mill. Transactions of the ASABE. 2015; 58 (3):585-596.

Chicago/Turabian Style

Andrzej Bochat; Leszek Wesolowski; Marcin Zastempowski. 2015. "A Comparative Study of New and Traditional Designs of a Hammer Mill." Transactions of the ASABE 58, no. 3: 585-596.

Journal article
Published: 01 April 2015 in Polish Maritime Research
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Cutting a tubular element into thin rings is an operation often used in engineering processes. Total work of the cutting consists of that necessary for initial deflection of cut material and the cutting work itself. This paper presents mathematical models which describe deflection of cross-section of a single tubular element as well as a single layer of tubes under action of external forces (acting and reacting ones). The deflection concerns end part of tube hence the cutting object model has been reduced to a thin ring. Results of calculation by using the developed models are presented for selected materials of tubular elements, which are commonly used for structures of the kind; moreover, they are prepared in a form of dimensionless diagrams, that makes it possible to use them for an arbitrary material.

ACS Style

Marcin Zastempowski; Andrzej Bochat. Mathematical Modelling Of Elastic Deflection Of A Tubular Cross-Section. Polish Maritime Research 2015, 22, 93 -100.

AMA Style

Marcin Zastempowski, Andrzej Bochat. Mathematical Modelling Of Elastic Deflection Of A Tubular Cross-Section. Polish Maritime Research. 2015; 22 (2):93-100.

Chicago/Turabian Style

Marcin Zastempowski; Andrzej Bochat. 2015. "Mathematical Modelling Of Elastic Deflection Of A Tubular Cross-Section." Polish Maritime Research 22, no. 2: 93-100.