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Number of results: 9
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Abstract

This article discusses the issue of the preparation of the foundry moulds with the use of an industrial robot. The methodology is presented for the determination of the process capacity index for placing inserts with flat and cylindrical faces. On the basis of the relationships developed, the process capability indices were determined at various points in the workspace, which are characterised by different values of the repeatability positioning error. It was shown that the value of the process capacity index can be increased by the selection of a suitable location for the process of placing the inserts in the workspace. It should also be noted that the value of the process's capability index depends on the selection of the place in the robot workspace where the process is carried out. Implementation of the joining process at an analysed point in the robot workspace leads to an increase of the process capability index MCp for inserts with flat faces up to 1.1 (+4.5%) and for inserts with cylindrical faces up to 1.3. This results in an increase of 13% to a level corresponding to the global standard for process reliability (MCp = 1.33).
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Authors and Affiliations

J. Jaworski
R. Kluz
T. Trzepieciński
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Abstract

Ensuring the required quality of castings is an important part of the production process. The quality control should be carried out in a fast

and accurate way. These requirements can be met by the use of an optical measuring system installed on the arm of an industrial robot. In

the article a methodology for assessing the quality of robotic measurement system to control certain feature of the casting, based on the

analysis of repeatability and reproducibility is presented. It was shown that industrial robots equipped with optical measuring systems have

the accuracy allowing their use in the process of dimensional control of castings manufactured by lost-wax process, permanent-mould

casting, and pressure die-casting.

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Authors and Affiliations

R. Kluz
J. Jaworski
T. Trzepieciński
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Abstract

This article presents the results of investigations of the effect of heat treatment temperature on the content of the carbide phase of HS3-1-2

and HS6-5-2 low-alloy high-speed steel. Analysis of the phase composition of carbides is carried out using the diffraction method. It is

determined that with increasing austenitising temperature, the intensification of dissolution of M6C carbide increases. As a result, an

increase in the grain size of the austenite and the amount of retained austenite causes a significant reduction in the hardness of hardened

steel HS3-1-2 to be observed. The results of diffraction investigations showed that M7C3 carbides containing mainly Cr and Fe carbides

and M6C carbides containing mainly Mo and W carbides are dissolved during austenitisation. During austenitisation of HS3-1-2 steel, the

silicon is transferred from the matrix to carbides, thus replacing carbide-forming elements. An increase in a degree of tempering leads to

intensification of carbide separation and this process reduce the grindability of tested steels.

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Authors and Affiliations

R. Kluz
J. Jaworski
T. Trzepieciński
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Abstract

This paper presents the results of experimental research on the fabrication of thin-walled panels with longitudinal stiffening ribs by the single point incremental sheet forming technique. The bead-stiffened panels were made of Alclad 2024-T3 aluminium alloy sheets commonly used in aircraft structures. The influence of forming parameters and tool strategy on surface quality and the possibility of obtaining stiffening ribs with the required profile and depth was tested through experimental research. Two tool path strategies, spiral with continuous sinking and multi-step z-level contouring, were considered. The results of the experiments were used to verify the finite element-based numerical simulations of the incremental forming process. It was found that the main parameter which influences the formability of test sheets is the tool path strategy; the tool path strategy with multi-step z-level contouring allowed the rib to be formed to a depth of 3.53 mm without risk of cracking. However a greater depth of rib equal of 5.56 mm was achieved with the continuous tool path. The tool path strategy was also the main parameter influencing the surface finish of the drawpiece during the single point incremental forming process.
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Authors and Affiliations

B. Krasowski
1
ORCID: ORCID
A. Kubit
2
ORCID: ORCID
T. Trzepieciński
2
ORCID: ORCID
J. Slota
3
ORCID: ORCID

  1. Carpatian State School in Krosno, Krosno, Poland
  2. Rzeszow University of Technology, Faculty of Mechanical Engineering and Aeronautics, 12 Powstańców Warszawy Av., 35-959, Rzeszów, Poland
  3. Technical University of Košice, Košice, Slovakia
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Abstract

This study aims to determine optimal forming parameters for Incremental Sheet Forming process Commercially Pure titanium Grade 2 sheets in terms of formability improvement, force reduction, and efficiency of forming. Based on the central composite design, data were collected during 20 runs and then variation analysis was performed. The experiments were performed on a 3 axis CNC milling machine equipped with a Kistler dynamometer plate. Subsequently, regression models have been developed to describe process responses by input factors. As crucial parameters, the relative velocity and step size of the tool that affect the forming force and the height of the fracture have been determined. Finally, the application of optimization algorithm has emerged optimal input factors in terms of selected multi-criteria goal. The results of this study suggest that there is a process window that allows the formation of 45° wall angle drawpieces of commercially pure titanium Grade 2.
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Authors and Affiliations

M. Szpunar
1
ORCID: ORCID
T. Trzepieciński
1 2
ORCID: ORCID
R. Ostrowski
3
ORCID: ORCID
M. Zwolak
3
ORCID: ORCID

  1. Rzeszow University of Technology, Doctoral School of Engineering and Technical Sciences, 8 Powst. Warszawy Av., 35-959, Rzeszów, Poland
  2. Rzeszow University of Technology, Department of Manufacturing and Production Engineering, 12 Powst. Warszawy Av., 35-959, Rzeszów, Poland
  3. Rzeszow University of Technology, Department of Materials Forming and Processing, 12 Powst. Warszawy Av., 35-959, Rzeszów, Poland

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