MM Science Journal, February 2024

THE USE OF DATABASE IN THE PLANNING OF ASSEMBLY WORKPLACES AND SYSTEMS

Adriana Kamenszka, Stefan Vaclav, Tomas Machac, Peter Kostal
Keywords: Vitreous Enamel | surface treatment | coating | SLM | additive technology

In the context of advancing technologies and industrial modernization, attention must be directed not only towards production technology but also assembly processes. This article aims to formulate a conceptual solution for rationalizing assembly workplaces, creating an integrated methodology and tools. The theoretical segment reviews the current state of assembly workplaces and systems. An analysis base (…)

SURFACE PRETREATMENT OF SELECTIVELY LASER MELTED 316L STAINLESS STEEL SUBSTRATE AND ITS EFFECT ON THE QUALITY OF THE VITREOUS ENAMEL COATING

Kristyna Sternadelova, Hana Krupova, Jiri Hajnys, Jakub Mesicek, Petr Mohyla
Keywords: Vitreous Enamel | surface treatment | coating | SLM | additive technology

This paper examines various surface pretreatments and their impact on the quality of vitreous enamel coating. In this case, 316L stainless steel was chosen as the base material and a premix enamel coating specially prepared for stainless steel for enamelling. Samples prepared by Selective Laser Melting (SLM) were used. Both mechanical (blasting, tumbling) and chemical (pickling) pre-treatments were appl (…)

PROBLEMS OF MEASUREMENTS OF ROUNDNESS DEVIATIONS WITH THE USE OF COORDINATE MEASURING MACHINES

Krzysztof Stepien, Urszula Kmiecik-Sołtysiak, Lenka Cepova, U. Zuperl
Keywords: Form deviation | Measurement strategy | CMM | Scanning speed

This work deals with the problem the measuring of form deviations of rotating parts with the use of coordinate measuring machines equipped with a scanning probehead. The authors investigated the influence of the measurement speed and the number of sampling points on the results of the roundness deviation assessment. The experiments were carried out on a Prismo Navigator coordinate measuring machine (Zei (…)

PROPERTIES OF GRADIENT LAYERS OBTAINED THROUGH HVOF SPRAYING AND PLASMA CLADDING

Vladislav Ochodek, Michal Szymura
Keywords: Gradient layer | plasma cladding | Stellite 6 | thermal coating | HVOF spraying

The study discussed in the article aimed to identify the obtainability of a gradient layer made by the High-Velocity Oxygen Fuel (HVOF)-spraying of an NiAl-based coating between a layer made using the plasma cladding process and powder Stellite 6 and a substrate made of structural steel S355JR. Overlay welds obtained in related tests were made using various process parameters as well as various values o (…)

BLANK MATERIAL INFLUENCE ON STAMPING SPRINGBACK

Radek Cada, Petr Tiller, Antonin Hikade
Keywords: Drawing | finite elements method | sheet-metal | Simulation | Springback | 3D measuring device

This paper concerns the evaluation of blank material influence on springback of irregularly shaped stamping after drawing operation to keep the dimensions and tolerances of stamping after the drawing process which are given in part drawing. Simulation of the drawing process and consequent stamping springback were carried out by PAM-STAMP 2GTM software which uses the finite elements method, with the use (…)

POSSIBILITY OF INCREASING THE LIFETIME OF THE CHOPPING KNIFE BY APPLICATION OF PVD COATING EVALUATED IN LABORATORY CONDITIONS

Miroslava Tavodova, Jozef Krilek, Ladislav Falat
Keywords: X48CrMoV8-1-1 steel | AlCrN coating | abrasive wear | Hardness | chopping wood

A wood is a heterogeneous material and its elements adversely affect the process of its processing. This also significantly affects the service life of tools during its processing. The aim of the contribution was, based on laboratory tests, to assess the suitability of the application of the selected coating on the chopping knife. After the basic analysis of the chopping knife, the CROSAL+ (AlCrN) coati (…)

FRAME DESIGN OF INLINE SKATES MADE BY ADDITIVE TECHNOLOGY

Eliska Posmykova, Jiri Hruban, Jakub Mesicek, Roman Blaha, Quoc-Phu Ma, Jiri Hajnys, Jana Petru
Keywords: topology optimization | mechanical engineering design | frame | inline skates | additive manufacturing | Powder Bed Fusion

The aim of the article was to investigate the possibility of topological optimization (TO) of the inline skate frame manufactured through the Powder Bed Fusion (PBF) method of AISi10Mg-0403, an Additive Manufacturing (AM) technique. The study's core objective was to leverage The Altair Inspire software to re-envision the initial CAD model, culminating in an organic and bionic frame design. Incorporating (…)

ABRASIVE SURFACE TREATMENT OF ALSI10MG PARTS MADE BY L-PBF

Abdesselam Mechali, Jakub Mesicek, Quoc-Phu Ma, Jiri Hajnys, Preeti Gautam, Roman Blaha, Dominik Krisak, Jana Petru
Keywords: Selective Laser Melting (SLM) | surface roughness | abrasive surface finishing | AlSi10Mg

The scientific community has been intensively studying how to improve the level of surface roughness on 3D-printed parts, particularly metallic parts made using the selective laser melting (SLM) technique. Various research papers on this subject have revealed that accurate surface roughness data can be generated using several methods that are, in fact, not cost-effective. For this reason, the finishing (…)

ENERGY ABSORPTION AND DEFORMATION PATTERN OF CIRCULAR HYBRID CRASH BOX SUBJECTED TO FRONTAL LOAD

DELIA HANI WAKHIDAH, MOCH. AGUS CHOIRON, YUDY SURYA IRAWAN, ANINDITO PURNOWIDODO
Keywords: Deformation pattern | energy absorption | hybrid | metal | composite

Crashworthiness is related to the ability of a structure to reduce the effects of a collision risk of injury to passengers and the risk of damage to vital parts of the vehicle. Geometry design of crash box is one important parameter to increase crashworthiness performance by increasing energy absorption through progressive deformation. In previous studies, circular crash box absorbed higher energy than (…)