<p>This study investigates the forming of the inside radius in thin sheet&nbsp; bending using nonlinear simulations in SolidWorks. Various V-die sizes were analyzed to evaluate their influence on the bending process. Simulation results were compared with actual bent components and existing data from literature to assess accuracy and reliability. The findings demonstrate a strong correlation between simulated and realworld results, confirming the validity of SolidWorks' nonlinear simulation&nbsp;<br />capabilities in predicting material behavior during air bending. These insights contribute to improved die selection and process optimization, ensuring enhanced bending accuracy for manufacturing applications</p>

<p>Air bending is one of the most common methods of forming positions from&nbsp; sheet metal. It has found wide use due to the simplicity of the procedure and&nbsp; the possibility of bending any angle by controlling the movement of the&nbsp; upper tool (punch). With this procedure, it is possible to create very complex&nbsp; shapes that can have a large number of bends.&nbsp;<br />In order to form the developed form based on the given bent form, we must&nbsp; accurately determine the K-factor, which is the basic factor that defines the&nbsp; arrangement of the bent lines and the length of the piece in the developed&nbsp; form. There are many parameters that affect the K-factor, among others are&nbsp; the type and thickness of the material being bent. In this paper, it was analyzed whether, and to what extent, the choice of the bottom tool (V-die)&nbsp; affects the K-factor. In the experimental part, test pieces of the same width&nbsp; and length were bent on dies of different widths, and after required measurements and K-factor calculation, the magnitude of this influence was determined.</p>

The paper presents one aspect of the analysis of energy consumption and productivity of the manufacturing operation. As an example of the operation, the operation of turning with a single-blade tool was taken. Sustainable development in its general concept implies sustainable materials, sustainable design, and sustainable manufacturing. This paper presents an analysis of one important part of sustainable manufacturing, and that is energy saving. The experimental study was conducted as follows. In laboratory conditions, an experimental-mathematical regression model of the relationship between cutting force and processing conditions was defined. Machining experiments were performed under ECO-friendly conditions with technology known as MQCL (Minimum Quantity Cooling Lubrication) machining. The obtained mathematical model was used to calculate the energy consumption and the workpiece material removal rate (MRR, productivity). The results of the analysis showed that there is a lot of space for optimization of machining conditions from the aspect of power consumption, with mandatory calculation and other machining costs, above all, the cost of tools and machine tools. In this regard, recommendations for analysis with the aim of power saving are given.

In the recent years, 3D printing has become a topic of great interest from both academic and the industrial sector through the increasing importance of Industry 4.0. This technology is based on layer-by-layer melting of materials to create a three-dimensional object. It is also known as additive production, and it is feasible through several different methods such as stereolithography, selective laser melting and sintering (SLM, SLS), these are just some of the examples, but fused decomposition modeling (FDM) has become the most interesting technique.This paper seeks to analyze the fracture strength (torque) of coupled gears made out of PLA plastic produced by the 3D printing process. To reduce the number of experimental measurements, the Taguchi L8(27) orthogonal array was used to analyze the influence of factors on two level. Investigated factors were: wall thickness, infill and number of infill lines, layer height, temperature, cooling and speed. Finally, optimization of most influential factors according to maximum torque was preformed, using Taguchi method too.

<p style="text-align: justify;">Final product of the cold forming process gain many advantages that are mostly produced by strengthening of the material in the process. Those advantages are primarily explained as improving mechanical characteristic of the work material. Because of the effects of strengthening and as one of the specific methods of forming rotationally symmetrical parts in demanding industries increasingly applied forward cold flow forming (FCFF). In this paper is shown an example of forward cold flow forming application process in production of 99,5% Al workpieces with focus on analysis of a strengthening effect of the processed material by the change in its hardness like HB.</p>

Abstract The process of cold flow forming (CFF) is a method of plastic deformation in which by using tools in the form of balls, rollers or flowforming wheel on special mandrel hollow cylindrical or conical parts, such as the various geometric combinations are obtained. The technology is classified as a NSF technology (”net-shape forming”) because it allows production of parts that are without any or with minimal subsequent modification of functional area and as such can be considered as a final product for installation. This paper shows an example of producing 99.5% Al tube workpieces by means of CFF technology. The analysis of the quality of the resulting outer surfaces by measuring the geometrical characteristics of profiles with special reference to the waviness outer surface of workpieces has been performed. The measurement was performed on 3D optical microscope.