Wire electrical discharge machining is an unconventional technology used in many industries. The machinability analysis of the newly-created materials crucial for their future with given technology. For analysis, influence parameters, namely pulse off time, gap voltage, current, on time and wire feed, was investigated a planned experiment 33 rounds. Both cutting speed roughness were analysed. surface morphology machined pieces examined electron microscopy subsurface layer cross-sectioning...

Mine aerosol poses a serious health threat due to its easy access the human respiratory tract. Damage may be caused by chemical composition of dust and substances adsorbed on surface, including microorganisms that potentially affect health. Our proposed research aimed isolate Staphylococcus aureus strains from coal mine bioaerosol assess sensitivity towards selected antibiotics. Bioaerosol samples were collected in three underground hard mines located Upper Silesia southern Poland....

The paper presents a methodology for determining the volume of batch conveyed material located before transverse partition certain height and distance over which extends on working surface conveyor belt along its longitudinal axis. Knowing geometric dimensions transported makes it possible to appropriately set spacing cleats thereby optimally determine conveying performance inclined conveyor. When angle inclination with straight idler frame is equal surcharge material, then no layer carried...

Unconventional wire electrical discharge machining technology (WEDM) is a key process, especially for newly emerging materials, as there are almost no restrictions (only at least minimal conductivity) in terms of demands on the mechanical properties workpiece or need to develop new tool geometry. This study first present an analysis machinability developed high entropy alloys (HEAs), namely FeCoCrMnNi and FeCoCrMnNiC0.2, using WEDM. The aim this was find optimal setting machine parameters...

Abstract Electrical discharge machining (EDM) is an unconventional technology. It allows of at least electrically conductive materials. The trend miniaturization industrial products obvious. However, the required quality and accuracy must be maintained, which can achieved with micro-EDM. One also optical devices used for testing cars. These contain miniaturized parts, are, however, necessary their proper functioning. For this reason, study was performed, focused on production a precise slot...

Wire electrical discharge machining (WEDM) is an unconventional technology that can be used to machine materials with minimum conductivity. The often employed in the automotive industry, as it makes possible produce mold parts of complex shapes. Copper alloys are commonly electrodes for their high thermal subject this study was creating mathematical models optimization Ampcoloy 35 different thicknesses (ranging from 5 160 mm a step mm) using WEDM improve surface properties parts. Box–Behnken...

Abstract This article deals with the adjustment of a 3D printer for laser engraving and material cutting. The print head can be fitted solid diode module, which achieves compact size while retaining its useful power. Two paths lead to use such concept. It is possible equip existing also brings number disadvantages as, example, reduction printing space or need suitable mounting design. A more elegant solution consider this in design system exchange heads engraving. Such allows full...

Heat resistance, heat stableness and corrosion resistance are properties that predispose nickel superalloys such as Inconel 625, Mar-M247, Nimonic C 263 B1914 to a very wide range of applications. Due their mechanical properties, machinability by conventional technologies is relatively difficult, so wire electrical discharge machining (WEDM) widely used, where only one condition placed on the material being machined, which at least minimal conductivity. Despite fact main element these always...

Die-sinking electric discharge machining (EDM) is an indispensable technological operation, especially in the production of molds and all internal external shapes cavities. For this reason, effect machine parameter settings (open-voltage, pulse current, on time, off time) two types steels, 1.2363 1.2343ESR, was carefully investigated using graphite or copper electrodes 10 mm × 100 shapes. purpose, a two-level half factor experiment performed with one replication at corner points replications...

This paper presents a laboratory device simulating section of conveyor belt on which diagonal plough is installed. Experimental measurements were carried out in belonging to the Department Machine and Industrial Design at VSB-Technical University Ostrava. During measurements, plastic storage box, representing piece load, transported surface constant speed was brought into contact with front plough. The aim this determine amount resistance generated by when it placed different angles...

Wire electrical discharge machining is an unconventional technology that crucial in many industries. The surface quality of the machined parts carefully monitored, but condition subsurface layer also plays a role, especially case defects occurrence such as cracks or burnt cavities. individual materials affected differently due to wire machining. For this reason, study was carried out focusing on detailed analysis transmission electron microscope (TEM) lamella made Ti-6Al-4V titanium alloy,...

The aim of the study was evaluation suitability using filler surfacing materials in abrasion resistant layers according to their material and tribology features. Laboratory analysis selected consisted tests hardness, microstructure wear resistance determination. abrasive defined standard STN 01 5084. On basis results obtained, we can state that hard-facing for background is tenable purpose amount decrement where prevails.

The paper presents the measured values of tensile forces acting on transmission idlers in upper and lower run a conveyor belt placed laboratory machine designed at Department Machine Industrial Design, Faculty Mechanical Engineering, VSB-Technical University Ostrava). detected by two strain gauge load cells recorded using DEWESoft software were used to calculate friction coefficient which acts surface driving drum casing belt. slip point, or during slippage rubber steel was determined for...

In mining machines with friction discs, but also in multi-rope traction elevators, it is necessary to distribute the applied tensile load, generated by weight of cage and counterweight, evenly all cross-sections load-bearing ropes. Hydraulic devices used for this purpose can operate on principle Pascal's law. The article presents a structural design, 3D model an implemented solution laboratory device capable simulating practical method distributing total load into partial forces...

Abstract Computer systems supporting the management of machines operation and maintenance in companies have been successfully applied many branches industry. Over last few years these considerably transformed. It also seems that using them for operating mining hard coal mines is inevitable, as generates high production costs. If implemented, will allow optimization stocks, spare parts materials, supplies, outsourced services well maintenance-repair works. Application a system...

Wire electrical discharge machining (WEDM) is an unconventional and very efficient technology for precision of the Nimonic C 263 super alloy, which widespread, especially in energy, aerospace automotive industries. Due to discharge, defects form cracks or burned cavities often occur on machined surfaces, negatively affect correct functionality service life manufactured components. To increase efficiency using WEDM, this study, extensive design experiments was carried out, monitoring input...

In lifting systems used for the vertical transport of bulk materials and individual items or persons, so-called frictional force transmission between a steel cable pulley is used. Due to sufficient contact pressure groove surface cable, moves as result fibre friction. general, it possible define (also called belt) friction resistance that imposed on flexible sliding over rounded pulley. The tractive considered safe if there no slippage in groove. event insufficient against friction, process...

The unconventional technology of wire electrical discharge machining is a key engineering technology, designed primarily for conventionally difficult machine materials. One them nickel alloys, which are majorly used in the aerospace and energy industries. subject research this study was specifically B1914 nickel-based superalloy, subjected to many analyses leading an overall optimization its using machining. In order determine effect parameters setup (pulse off time, gap voltage, current,...