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Innovative solutions of waste products minimization in the process of disks of tinned sheet cutting out by plastic working method are described in this article. Influence of various possibilities of allowances minimization in sheet cutting out process for Twist Off covers production have been analyzed in the work. The way cutting off the sheet delivered into the press and the sheet allowances between...
This paper presents a comprehensive literature survey of the potential applications of bionic achievements related to both design and manufacturing of machine elements with required functional properties. The motivation is that any machine tool or manufacturing process designed even by experienced engineers are not as excellent as the functional behaviour of plants, animals or processes occurring...
The paper demonstrates results of analytical researches on carrying subsystem of machine tool in designation of its static stiffness characteristics. Varied kinds of models that differ in solid structure simplifications have been considered. The aim of researches was to find effective, considering designing needs, modeling methods of this subsystem and an attempt to formulate general recommendations...
In this manuscript the theoretical studies of aluminisation by CVD method is shown. The bi-velocity model of multicomponent and multiphase diffusion is used to calculate the growth of β-NiAl phase under different ranges of miscibility (HCl to H2 ratio). The composition dependent diffusivities of β-NiAl and Ni3Al at 1350 K are presented and used in calculations.
Paper contains an analysis of the 1st stage compressor blade strain distribution. Boundary conditions analysis was presumed for blade clamped in the fatigue holder. Strain distribution verification was performed for blade fundamental frequency. Numerical method results were verified with experimental (strain gauge) method.
This paper presents a mathematical description of tooth flank surface of the worm wheel generated by the hourglass worm with convex or concave tooth axial profile. The kinematic system of globoid worm gear and tooth formation of worm wheel was performed. The mathematical description of tooth flank of globoid worm with arc profile was used. The presented mathematical model of tooth flank of worm wheel...
The article presents results of research on the influence of the chemical composition of the plasma plume and the powder feed rate on microstructure and thickness of the ceramic coating deposited on IN617 alloy substrate by Plasma Spray Physical Vapour Deposition (PS-PVD) method. There were used three powder feed rates: 2, 10 and 30 g/min and five different compositions of plasma gas (Ar, He, H2 and...
In the paper the results of metallographic examination of welded joints for car air-conditioning unit are presented. The European directives 2006/40/EC on the greenhouse gasses elimination demand to stop using traditional refrigerant and to change it to R744 medium in air conditioning installation. The R744 (CO2) refrigerant is environmental friendly medium if compared with standard solution such...
The review of the literature concerning hard anodizing of aluminium alloys was performed. The main features of the process was described as well as the influence of the anodizing parameters on the properties of hard anodic coatings. The most common industrial processes of hard anodizing applied for cast and wrought aluminium alloys were presented. The application of hard anodic coatings as well as...
The paper raises the issues of the computerized support of the determination of the trajectory of the shaping roller movement with the compensation corrections taken into consideration, resulting from an complex profile of the working roller. Double radius rollers have been considered with a number of favourable operation features but requiring an increased amount of labour at the stage of the development...
The paper presents a comparison of selected fatigue strength test methods to determine the average finite life fatigue strength. The tests were performed on aircraft engine compressor blades. The paper covers blades fatigue tests results performed using electrodynamic shaker.
Article presents description of performed attempts of innovative operations used in modern CNC lathes control systems to make specific objects. Problems of making different operations, that requires new attempt to programming are shown. There are shown different methods of use of new operations in different control systems for accomplishing operations like relieving shape mills, making threads not...
This article presents the process of determining reduced stress which occurs during the deformation of the flexspline of the toothed harmonic drive. The discussed issue is complex as the stress distribution results from the deformation of the flexspline by the generator and from the load it carries. The article takes into account flexsplines of various tooth profiles: involute, rectilinear and convexo-concave...
Structural elements made of nickel-based superalloys are often plastically formed at elevated temperature (e.g. by stamping) so detailed characterization of their deformation behaviour is crucial. Some alloys exhibit unstable plastic flow at elevated temperature characterized by serrated yielding, known as Portevin-Le Chatelier (PLC) effect. This phenomenon is usually attributed to dynamic strain...
In the paper the results of welding of girth welded joints of steel pipe API 5L grade X70 (L485M) are presented. Manual metal arc (MMA) and metal active gas welding (MAG) were applied. Two welding filler metals for MMA were used to weld the girth welded joints and one for MAG process. The results of mechanical tests and distribution of residual stress of the girth welded joints are presented. Results...
Electrochemical machining process (ECM) can be applied for shaping advanced materials which are difficult or impossible for machining using conventional methods. In electrochemical machining the workpiece is an anode and material is removed as a result of electrochemical reactions “atom” by “atom”, without mechanical forces. This mechanism of material removal makes it possible to obtain high quality...
The basic factor limiting the use of glasses is their unsatisfactory mechanical strength. The improvement of the mechanical strength of glasses is usually obtained by applying their respective thin surface layers. The object of the research was glass coated with zirconium oxide. For the application of zirconium oxide layer, LPPS (Low Pressure Plasma Spraying) method was used. The resulting materials...
The study presents investigation results of technological quality of teeth of a cylindrical gears made of 18CrMo4 steel, carburized, quenched and tempered, and grinded with use of profile dividing method on grinding machine of Höfler Rapid 900 type. It have been included investigation results of geometrical accuracy and selected properties of surface layer of the teeth after hobbing operation, thermal-chemical...
The paper presents an original approach to the prediction of deteriorations of the surface profiles produced on hardened steel parts using CBN tools. The experimental investigations involve recording of surface profiles and corresponding measurements of cutting forces resulting from variable feed rates of 0,05-0,1 mm/rev. As a result, machined surfaces with the Ra parameter ranging from 0,05 μm to...
Given the importance of quality and responsiveness of manufacturing companies to customers, the most important principle can be considered reducing the cycle time of the production process. Since preserving the quality standards in a disposable necessities manufacturer is important, the Fuzzy Taguchi method as a powerful design optimization tool is used to determine the quality and design of optimal...
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