This article presents synthetically the situation of companies of the wood sector in Poland and describes the directions of development of their innovation, in particular for wood and furniture industry. Furthermore, it describes European Union policy to support activities of producers of the wood sector and identifies selected sources of financing their activities. The article attempts to indicate the (…)
The article deals with the description of the experimental results of static radial deformation characteristics measurement for the selected tire and its impact on the size of the contact area, contact pressure and rolling resistance on a solid support. The measurement was carried out on the diagonal tire Mitas TS05 10.0/75-15.3 PR10 in the area of the test soil channel. The radial deformation characte (…)
PVD, combined electroplating and PVD methods were applied to increase wear resistance of the hard alloy cutting elements for woodworking. Laminated chipboards milled by a tool with knives were coated with ZrN, Mo-N, and ZrN-Ni-Co layers. Abrasive wear of tools blades occurred. The wear intensity of the knife blades with deposited coatings was reduced. The value of volume wear of knife blades with coati (…)
The paper deals with an analysis of frequency characteristics scanned at the spindle of CNC machining centre Pinnacle PKVMC650S.It also points on the early diagnostics necessity of possible sources of unwanted vibrations to predict the behaviour of devices, to find out the life of devices and to improve the quality of machined surface. The method of the planned experiment was used as the research metho (…)
This paper presents a regression analysis of the relationship between values of profile and areal surface texture parameters extracted from the same surfaces. The problem of tolerancing for areal surface texture evaluation is briefly introduced. Basic concepts of and differences between areal and profile evaluation are discussed. Measurements of 21 samples of diverse origin are used as data for linear r (…)
The paper deals with the low pressure sewer networks which are used for the systematic drainage of wastewater in locations where it is not technically possible, respectively economically advantageous to build a gravity sewer network. With regard to the size of the urban area, town or drainage site these systems can be very large, involving tens or hundreds of independently working pumps that are connect (…)
The state-of-art machine tools incorporate a wide variety of sensors and associated signals that are used within the control system or as a process monitoring variables. Machine tool canalso be equipped with additional sensors required by customer or manufacturer with relatively no limitation. Therefore, the key issue is in “separating the wheat from the chaff”. Only those data that can be linked to mac (…)
The presented article focuses on measurements of extremely small dimensions in nanometrology using tactile probes. It addresses a newly developed method of precise measurements in nanometrology by touch probes, where the measurements are carried out on the machine SIOS NMM-1. The aim of this work is to determine accuracy of measurements on this machine. The main contribution of this work is a creation o (…)
This article is devoted to diagnostics of rotating machines – electric motors and generators. It describes their basic characteristics and failure modes in terms of statistics and experience. The methods of multi-parametric approach to electrical machines diagnostics are listed. The analysis methods based of vibration measurement are emphasized due to the fact that vibration analysis is the best way to (…)
Energy efficiency of electrical appliances is highly debated topic at present.This topic is transferred especially in industries where are the effects of savings much more significant due to higher energy consumption.In the case of machine tools is at present energy efficiency also a hot topic,basedon the Kyoto Protocol and the European Commission Regulation of energy appliances eco-design.Machine tool (…)
Wire electrical discharge machining (WEDM) cuts material using the principles of electroerosion, which conclusively defines the resulting morphology of the machined surface. During the erosion process, removal of tiny particles of material (tiny globules) is achieved using a stream of dielectric. On certain surfaces, these tiny globules get stuck during the thermaltreatment and remain on the machined su (…)
The paper deals with the issue of geometric precision measuring at large parts (especially at castings having big dimensions) in their manufacturing stage. The large parts of machine-tool frames are required to have their geometric tolerances in thousandths of millimetres. The production or cooperation abilities of the particular company must be adapted to these demands and it is also necessary to adapt (…)
Highly oriented pyrolytic graphite is a material usually made for specific dimensions, however sometimes the need for altering them may arise. For this reason, it is necessary to choose a suitable technology for machining the material. This study deals with machining a part of highly oriented pyrolytic graphite using wire electrical discharge machining (WEDM). The morphology of the cut and the whole par (…)
Study relates to machining of toughly-machined metal materials specifically turning of the Inconel 625. There had been planned an experiment to find out the impact of setting the individual parameters of machining(cutting speed, feed rate, depth of cut)onto the quality of machined surface. Such experiment was the type of ‘box behnken’and contained 15 rounds. Following was the evaluation of the machined (…)
The iron-rhodium alloy, having very interesting magnetic properties, is being studied for future use in next-gen data storage methods, for which high-speed information inscription is predicted. The examined material has been made by casting, but a for the purpose of examining its magnetic properties, the need for reducing the size of the sample arose. Because of this, wire electrical discharge machining (…)
This paper focuses on the evaluation of the approach to risk management in management systems in technical industries. The underlying framework is the updated standard ISO 9001 which is compared to the requirements of specific standards for the automotive industry, the aviation industry, the railway industry and the chemical and processing industries that fall under major accident prevention (SEVESO). T (…)
This contribution assesses the possibilities of application of conventional compensation technology on a small three-axis vertical machining centre. Small CNC machine tools are intended for manufacture of small workpieces with dimensional accuracy of up to 0.001 mm. To achieve the required accuracy and reproducibility of manufacture, a variety of software compensations are deployed on machines. The aim (…)
This paper is focused on 3D printing of metal parts and the limitations of this method. There are numerous methods currently used for 3D printing, for example, DMLS, SLS, CLADDING, etc. This paper is limited to 3D printing using DMLS (Direct Metal Laser Sintering). The method works with metal powder, which is applied to a building platform in thin layers. The shape of a part is sintered using a laser be (…)
This study compares 18Ni maraging steel processing on two competitive SLM machines, PXL and M2 Cusing. For the production of samples, powder material from original machine supplier was used on each machine separately. Process parameters for the production of small thin-walled parts were set individually on each machine according the recommendation of the device manufacturer. The basic mechanical propert (…)
This study is focused on the evaluation of mechanical properties and microstructure of fabricating Ni-free CoCrWalloy. Samples were prepared by additive manufacturing technology – selective laser melting. The chemical composition of used metal powder was – 60.5% Co, 28% Cr and 9%W. Parameters of SLM were given by powder supplier. The shape of thesampleis designed according to MPIF. After recommended hea (…)
The presented paper describes the impact resistance of lattice structure samples made by Selective Laser Melting with the use of AlSi10Mg powder material. The samples with five types of different unit cells of lattice structure were used in this study. The topology of the unit cells structure was changed to describe various impact resistance behavior while the relative density of lattice structure was k (…)
This article deals with the mechanical testing of polymeric materials processed using 3D printing and exposed to different chemical compounds. Information on this resistance is very important for the user from the point of view of the multidisciplinary use of prototypes of 3D printers for various applications. Materials used for these purposes are processed using the photopolymer processing technology P (…)
Nowadays, the use of optical 3D digitisation in metrology becomes more frequent and desired. Unfortunately, there are still no binding standards for determining measurement uncertainty of these systems and manufacturers of 3D scanners often use their own standards to define accuracy of their device. This paper introduces a methodology to assess the accuracy of digitisation using 3D optical scanners. The (…)
This article deals with designing a compact head for 3D printing using Fused Layer Modelling technology, better known as Fused Deposition Modelling (FDM) registered by Stratasys. Technically this technology is an extrusion process, which is very popular e.g. with the RepRap community. The aim is to design a print head based on commercially available basic components for printing two different materials, (…)
Plastics are relatively new materials used in almost all areas of human activity, and also in various branches of live and industries. Given the annually growing produce of plastics, their volume are evenly growing up also in the waste, therefore it is necessary to solve the waste from the increasing volume of waste plastic. The contribution deals with the using and testing of sorted plastic waste. From (…)
In this paper, we will present the research findings concerning relationships between technological and material parameters during densification of cherry tree sawdust. In general during in the biomass densification process technological and material variables influence this process and thus the final briquettes quality. The main goal of presented experimental research is to determine the impact and rel (…)
The paper describes a modern technology of biomass lowtemperature thermochemical conversion for production of biogenic fuels in gaseous, liquid and solid phases. The equipment which was acquired during the life of the project "Building Research Centre AgroBioTech", ITMS code: 26220220180, allows carrying out long-term experiments in pilot conditions. As an example of the high efficiency of the biomass c (…)
When forming a material, its good formability is essential. It is primarily influence by mechanical properties and chemical composition of the material. Formability can be assessed by mechanical tests, or technological tests. Tensile test is one of the most common mechanical tests used to obtain basic mechanical properties of the material. Another possibility how to evaluate the behavior of a material u (…)
Efficient machining using the technology of wire electrical discharge machining (WEDM) is a compromise between cutting speed and surface quality. Typical morphology of WEDM processed surface features plenty of craters caused by electrospark discharges produced during the cutting process. The study deals with the evaluation of S-parameters enabling quantitative evaluation of the surface in all directions (…)
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