Experimental Assessment of Roughness Changes in the Cutting Surface and Microhardness Changes of the Material S 355 J2 G3 after Being Cut by Non-Conventional Technologies

2011 ◽  
Vol 314-316 ◽  
pp. 1944-1947 ◽  
Author(s):  
Jozef Maščeník ◽  
Stefan Gaspar
Keyword(s):  
Mechanical Properties ◽  
Production Process ◽  
Laser Plasma ◽  
Manufacturing Process ◽  
Production Quality ◽  
Water Jet ◽  
Cutting Edge ◽  
Experimental Assessment ◽  
Cutting Surface ◽  
The Impact

Production of components, necessary for the construction of the machine resp. or device is a demanding manufacturing process. One of the possibilities of increasing efficiency and production quality is the introduction of unconventional technologies to the production process. Knowing the dependence of the impact of non-conventional technologies on the mechanical properties of products and their subsequent verification is an important aspect when designing and manufacturing them. The article deals with the impact of used unconventional technology, that means laser, plasma and water jet on the roughness of a cutting edge and microhardness of material S 355 J2 G3.

scholarly journals The impact of molded pulp product process on the mechanical properties of molded Bleached Chemi-Thermo-Mechanical Pulp

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Claire Dislaire ◽  
Yves Grohens ◽  
Bastien Seantier ◽  
Marion Muzy
Keyword(s):  
Mechanical Properties ◽  
Water Uptake ◽  
Process Parameters ◽  
Manufacturing Process ◽  
Water Immersion ◽  
Young Modulus ◽  
Drying Time ◽  
Mechanical Pulp ◽  
Hygroscopic Properties ◽  
The Impact

AbstractThis study was carried out using bleached softwood Chemi-Thermo-Mechanical Pulp to evaluate the influence of Molded Pulp Products’ manufacturing process parameters on the finished products’ mechanical and hygroscopic properties. A Taguchi table was done to make 8 tests with specific process parameters such as moulds temperature, pulping time, drying time, and pressing time. The results of these tests were used to obtain an optimized manufacturing process with improved mechanical properties and a lower water uptake after sorption analysis and water immersion. The optimized process parameters allowed us to improve the Young’ Modulus after 30h immersion of 58% and a water uptake reduction of 78% with the first 8 tests done.

Enhanced Reconditioning of Heavy-Duty Pulp Industry Equipment

2020 ◽  
pp. 219-235
Author(s):  
Armando Lopes Ramalho ◽  
Agostinho da Silva ◽  
Marcelo Calvete Gaspar ◽  
Carlos Capela ◽  
Luis Celorrio-Barragué ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Production Process ◽  
Manufacturing Process ◽  
Cutting Process ◽  
Abrasive Waterjet ◽  
Heavy Duty ◽  
Waterjet Cutting ◽  
Pulp Industry ◽  
Material Characteristics ◽  
Abrasive Waterjet Cutting

Within a pulp industry production process, a drop in the performance of a wood log rotary debarker was identified. Such loss of performance was due to the occurrence of excessive wear of the device's cutting blades, requiring their regular and premature replacement. The material used to manufacture the cutting blades, Hardox 500, has characteristics considered adequate for the required use. However, it was concluded that the blade manufacturing process degraded its mechanical properties, leading to its premature wear when placed in service. The present study intends to propose, characterize, and validate an alternative cutting process to manufacture the debarker's cutting blades. Abrasive waterjet cutting technology was proposed to produce the cutting blades. The suitability of this manufacturing process is discussed considering the specified geometry and the material characteristics of the resulting cutting blades.

scholarly journals BICYCLE HELMET DESIGN AND THE VIRTUAL VALIDATION OF THE IMPACT, AERODYNAMICS AND PRODUCTION PROCESS

2017 ◽  
Vol 15 (3) ◽  
pp. 353
Author(s):  
Bojan Boshevski ◽  
Ile Mircheski
Keyword(s):  
Production Process ◽  
Manufacturing Process ◽  
Flow Simulation ◽  
Virtual Prototype ◽  
Outer Shell ◽  
Bicycle Helmet ◽  
Element Analysis ◽  
Aerodynamic Properties ◽  
Functional Product ◽  
The Impact

This paper presents the development process of a bicycle helmet through individual research, creation, presentation and analysis of the results of the most important product development stages. The quality of the development and manufacturing process of the protective equipment for extreme sports is an imperative for a successful product and its flawless function. The design of the bicycle helmet is made following the rules of the design in order to create a well-founded and functional product. After creating design sketches, a virtual prototype was developed in "SolidWorks" using the required ergonomic dimensions. 3D printed model of the human head with adapted ergonomic dimensions and the designed bicycle helmet was developed in order to verify the applied ergonomic measures. The virtual model will be used as an input in the finite element analysis of the helmet impact test based on the EN1078 standard and the aerodynamic simulations executed in "SolidWorks Simulation and Flow Simulation", for verification of the impact and aerodynamic properties. Virtual testing of aerodynamic features and the ability of the bicycle helmet to allow ventilation of the user's head indicate that the helmet performs its function in the desired way. Also, the virtual prototype will be used for the production process simulation in "SolidWorks Plastics" in order to analyze the production of the bicycle helmet. The polycarbonate helmet outer shell is subject to a number of simulations for the sake of analyzing the production process in order to obtain the desired characteristics of the polycarbonate outer shell and to avoid the disadvantages that occur in the manufacturing process. The main goal of this paper is to develop a safety bicycle helmet with improved ergonomic, validation of impact, aerodynamic characteristics and production process in order to produce a high quality product for mass use.

scholarly journals The impact of molded pulp product process on the mechanical properties of molded BCTMP

2020 ◽  
Author(s):  
Claire Dislaire ◽  
Yves Grohens ◽  
Bastien Seantier ◽  
Marion Muzy
Keyword(s):  
Mechanical Properties ◽  
Water Uptake ◽  
Process Parameters ◽  
Manufacturing Process ◽  
Water Immersion ◽  
Young Modulus ◽  
Drying Time ◽  
Pressing Time ◽  
Hygroscopic Properties ◽  
The Impact

Abstract This study was carried out using bleached softwood Chemi-Thermo-Mechanical Pulp to evaluate the influence of Molded Pulp Products’ manufacturing process parameters on the finished products’ mechanical and hygroscopic properties. A Taguchi table was done to make 8 tests with specific process parameters such as moulds temperature, pulping time, drying time and pressing time. The results of these tests were used to obtain an optimized manufacturing process with improved mechanical properties and a lower water uptake after sorption analysis and water immersion. The optimized process parameters allowed us to improve the Young’ Modulus after 1h immersion of 58% and a water uptake reduction of 78% with the first 8 tests done.

Water Jet Technology Head Vibration Generation due to Selected Technology Parameters Fluctuation Effect during Alloy Cutting

2013 ◽  
Vol 308 ◽  
pp. 81-86 ◽  
Author(s):  
Luba Bicejova
Keyword(s):  
Production Process ◽  
Production System ◽  
Production Systems ◽  
Water Jet ◽  
Cutting Edge ◽  
System Technology ◽  
Fluctuation Effect ◽  
Nozzle Wear ◽  
Edge Quality ◽  
Cutting Production

The paper deals with a research of technology parameters fluctuation effect on AWJ production system technology head vibration generation during alloy cutting production process. The submitted paper points at possible sources of undesirable vibrations: technology head shift speed, kind and abrasive granularity, which can be a reason of reliability and AWJ technology production systems lifetime reduction, and of abrasive nozzle wear increasing as well as of cutting edge quality reducing.

Water Jet Technology Head Vibration due to Water Pressure Change

2014 ◽  
Vol 1061-1062 ◽  
pp. 511-514
Author(s):  
Luba Bicejova ◽  
Slavko Pavlenko
Keyword(s):  
High Pressure ◽  
Production Process ◽  
Surface Quality ◽  
Water Pressure ◽  
Pressure Change ◽  
Water Jet ◽  
High Pressure Pump ◽  
Pressure Pump ◽  
Cutting Surface

The following paper analyses effects of pressure values of a high pressure pump on technology head vibrations origin at hydroabrasive erosion in production process. The aim is to focus onto one of possible sources of undesirable vibrations which can be subsequently influencing the cutting surface quality.

scholarly journals Design and Testing of Low Cost Chair with Round Mortise and Tenon Joints

2016 ◽  
Vol 64 (2) ◽  
pp. 567-572
Author(s):  
Jaroslav Začal ◽  
Petr Dostál ◽  
Michal Šustr ◽  
Ioannis A. Barboutis
Keyword(s):  
Mechanical Properties ◽  
Developing Countries ◽  
Manufacturing Process ◽  
Low Cost ◽  
Simplified Model ◽  
Wood Material ◽  
Experimental Assessment ◽  
Joint Construction ◽  
Mortise And Tenon ◽  
Design And Testing

The present paper focuses on construction of school seats for developing countries from locally available resources using the local industry and low-end technology. Aim of the work is experimental assessment of mechanical properties of joints flexion in angular plane. Furthermore work considers assessment of joint firmness and comparison between various joint types. Paper encloses the review of various joint manufacturing designs (tenon and mortise), which were proposed for its suitable mechanical properties and simplicity of manufacturing. Designated joint type is easiest form of joint construction and technologically feasible for chair manufacturing. The joints were constructed from fir wood. Further the work introduces design of simple seat construction made from massive wood material manufactured by low-end technology with regards to achieving the due specifications. The task of this work is to design the viable manufacturing process of seats and chairs from raw wood and scrap material. Essential part of work is also manufacturing of seat prototype and simplified model of proposed mortise and tenon drill.

Abrasive Granularity Impact on Water Jet Technology Head Vibrations during Cutting Steel

2013 ◽  
Vol 389 ◽  
pp. 304-309 ◽  
Author(s):  
Luba Bicejova ◽  
Slavko Pavlenko ◽  
Jozef Maščeník
Keyword(s):  
Manufacturing Process ◽  
Water Jet ◽  
Cutting Edge ◽  
Cutting Steel ◽  
Edge Quality ◽  
Steel Cutting

The submitted paper deals with analyses of impact of water jet technology head vibrations due to variations of kinds and granularity of abrasive during steel cutting manufacturing process using AWJ technology. The paper points at necessity to diagnose and subsequently eliminate possible sources of adversed vibrations. They can influence lifetime and wear of water jet technology head, they can lower reliability as well as cutting edge quality.

scholarly journals The assessment of properties for selected factors in abrasive water jet process

2015 ◽  
Vol 21 (3) ◽  
pp. 203
Author(s):  
Anna Šúňová ◽  
Roman Šúň ◽  
Emil Spišák ◽  
Mária Franková
Keyword(s):  
Water Jet ◽  
Cutting Edge ◽  
Abrasive Water Jet ◽  
Water Jet Cutting ◽  
Cutting Surface ◽  
Abrasive Water Jet Cutting ◽  
Cutting Rate ◽  
Cutting Velocity ◽  
Cut Surface

The article presents the current conditions of abrasive water jet cutting process and factors relative to the quality of cutting surface. The main goal of research was to evaluate the assessment of the cutting depth, corrugated bottom cutting edge and roughness of the specimens depending on selected factors such as cutting velocity and abrasive amount in the abrasive water jet process. Specimen were cut in four phases as a square. Main results were that the distance between water jet entering and water jet leaving is decreased with the increasing abrasive amount and by following lower cutting rates. The increasing of a cutting rate negatively effects the quality of the cut surface and the size of the distance between water jet entering and water jet leaving, because the increasing of a cutting rate increases also values of the mentioned parameters. As to the distance between water jet entering and water leaving, the abrasive amount of 200-250 g.min-1 at the rate of 50 mm.min-1 is considered to be optimal, but outside this range the influence of the abrasive amount impacts negatively, primarily on water jet entering and water jet leaving that has a direct influence on the corrugated bottom cutting edge.

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