- Type of paper
: Paper in journal
Title: Optimal Application of Some Workable Systems for the
Profiling of Plate Edges
- Authors:
- Hriešik, Andrej (16621)
- Šestan, Anton (111062)
- Tomašić, Lovorka (49765)
Journal: Strojarstvo Zagreb,
Number: 6
ISSN: 0562-1887
Volume: 34
Year: 1992
Pages: from 239 to 242
Number of references: 4
Language: hrvatski
Summary: The paper deals with results of the investigation into the
optimization degree of the application of machines with technical treatment
for cutting by means of oxyacetylene and plasma as well as by a special
milling cutter for proffiling of plate edges of a specific geometrical
quality. The plates to be used in shipbuilding.
Keywords: Machining System, Optimization, Profiling of Edges, Shipbuilding, Steel Plate
- Type of paper
: Paper in journal
Title: Seven-year Experience in Utilization of Electric Hand
Grinders
- Authors:
- Šestan, Anton (111062)
Journal: Brodogradnja
Number: 2
ISSN: 007 -215x
Volume: 42
Year: 1994
Pages: from 135 to 139
Number of references: 4
Language: hrvatski
Summary: The article presents the results collected during seven
years of utilization of electric hand grinders, employing elevated
frequency current, for grinding works during ship construction process. The
gained experience related to the construction of the subsystem for
generation and distribution of driving medium is described. The results of
electric energy consumption measurements along with records of hand
grinders maintenance costs are also given.
Keywords: Grinding Machines, Hand Grinders, Ship Construction, Cost Analysis
- Type of paper
: Paper in journal
Title: Purposefulness of Substituiting Acetylene by Propan/Butane
Mixture for Utilisation in Flame-Cutting Machines
- Authors:
- Šestan, Anton (111062)
Journal: Brodogradnja
Number: 1
ISSN: 007 -215x
Volume: 43
Year: 1995
Pages: from 55 to 57
Number of references: 3
Language: hrvatski
Summary: On the basis of flame-cutting machine cutting parameters, a
comparative analysis was made as to the consumption of flame-cutting media,
and cutting speed in relation to plate thickness, and cut lenghts on a
sample of steel plates from one large shipyard. In addition to the
manifested differences in single and total values, the analysis proved a
functional relation between cut length and depreciation period of the
subsystem for storage, preparation and regulation of propane/butane mixture
flow.
Keywords: Cutting Machines, Flame Cutting, Acetylene, Propane-Butane, Steel Plates, Cost Analysis
- Type of paper
: Paper in proceedings
Title: Identification of a Software for the Ship Pipes Treatment
Line Adoption Support
- Authors:
- Šestan, Anton (111062)
- Hriešik, Andrej (16621)
- Editors
- Franković, Bernard
Proceedings title: Zbornik Tehničkog fakulteta Rijeka br.14
Language: hrvatski
Place: Rijeka
Year: 1994
ISBN/ISSN: 0353-281x
Pages: from 95 to 103
Summary: Ship piping systems drawing, as required for an oceangoing
cargo ship, are partly made in shipyard drawing office on the basis of the
ship constructional drawings, and partly in the pipes workshop on the basis
of pipe dimensions measured on board the ship. On analysis of 162000
specific data, obtained from 9000 piping drawings prepared for construction
of a 112000 TDW crude oil tanker, revealed among other, that drawing
offices in leading Croatian shipyards deal with pipe assortments suited for
production line treatment of ship pipes. Such circunstance means that basic
conditions for easier adoption of CAD construction technique have been thus
provided, as a precondition for adoption of NC ship pipes treatment line.
Furthermore, the rest of the identified pipe assortments appear to be
suitable for treatment carried out on portable machines, with the sketches
of neccesary adjustments made by production technicious on the spot. Such
an arrangment would mean a lesser work load in the drawing office, with a
further advantage of a more comfortable pipes geometry adjustment range
applicable to the already fitted ship pipes.
Keywords: Ship Pipes, Ship Piping Drawing, Pipe Assortment
- Type of paper
: Paper in proceedings
Title: The Application Mathematical Model of Multifactorial
Experiment in Machining Operations
- Authors:
- Hriešik, Andrej (16621)
- Jurković, Milan (205935)
- Editors
- Šurina, Tugomir
Proceedings title: Zbornik radova 12, BIAM'94
Language: engleski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6037-03-3
Pages: from c-9 to c-14
Meeting: 12. Međunarodno savjetovanje BIAM'94
Held: from 06/23/94 to 06/24/94
Summary: The paper gives an analysis of multifactorial experiment
applications in machining operations. The mathematical model is obtained by
using the concepts on design of experiments. The application of described
procedure is ilustrated by an adequate example. The theoretical
investigations are experimentaly valorized. Research results are given in a
form of mathematical dependences Fi=...
Keywords: Mathematical Model, Experiment, Operations
- Type of paper
: Paper in proceedings
Title: Consumption of Compressed Air in Relation to Shipbuilding
Production Intensity
- Authors:
- Šestan, Anton (111062)
- Hriešik, Andrej (16621)
- Editors
- Ljubetić, Marijan
Proceedings title: SORTA'94
Language: engleski
Place: Dubrovnik
Year: 1994
ISBN/ISSN: 953-96105-3-2
Pages: from 132 to 140
Meeting: XI simpozij teorija i praksa brodogradnje, Dubrovnik
Held: from 05/19/94 to 05/21/94
Summary: Rhythm of operation of the compressors employed for feeding
of pneumatic hand tools and pneumatic portable fans utilized within the
ship construction process, was monitored in course of five calendar years
to the purpose of establishing of how the intensity levels in the
shipbuilding production reflect on the consumption of energy employed for
generation of compressed air. Analysis of variance of compressor working
time duration in course of daily hour revealed that there is statistically
significant relation between the production process, intensity and
consumption of compressed air, but at the same time it appeared that there
is a considerable independence in the loss of compressed air in respect of
the level of production capacities employment, and various levels of
sophistication in construction of newbuildings.
Keywords: Air, Consumption, Intensity, Production, Shipbuilding
- Type of paper
: Paper in proceedings
Title: A contribution to the Research of the Application of
Coated Tools in Shaping Technology
- Authors:
- Hriešik, Andrej (16621)
- Šestan, Anton (111062)
- Editors
- Fotejt, M
Proceedings title: FORM'95
Language: engleski
Place: Brno, Češka
Year: 1995
ISBN/ISSN: 80-214-0664-x
Pages: from 97 to 100
Meeting: International Conference Brno'95
Held: from 09/13/95 to 09/14/95
Summary: The paper deals with the results of the sheet metal
treatment by distorsion such as stamping machines for sheet metals, forging
tools, etc. The purpose of the investigation is the tool durability with or
without TiN coating and the applied technology PVD. Essential parameters of
tool ennobling are varied in order to achieve better results in production
conditions. The process has led to tool characteristics advisable for some
treatments by distortion.
Keywords: Application, Coated, Tools, Technology
- Type of paper
: Paper in proceedings
Title: Solution for Ventilation System of ship Inner Space during
Painting Works
- Authors:
- Šestan, Anton (111062)
- Editors
- Androček, Vladimir
Proceedings title: IMAM'95 CONGRESS
Language: engleski
Place: Dubrovnik
Year: 1995
ISBN/ISSN: 953-6017-02-4
Pages: from 719 to 730
Meeting: VII-th International Marine Association of Mediterane, Dubrovnik
Held: from 04/23/95 to 04/27/95
Summary: The paper describes the results reached through a research
of explosive vapours developed during coating of inner ship spaces by means
of spraying technique in certain defined conditions. These defined
conditions were: ventilation arrangement performances, spaces topography,
and coat spraying intensity. The research methodology has been principally
based on measuring of air steam rates within the subject spaces, and on
on-line measurement of developed vapours concentrations during spraying
operation. The results obtained showed oscilating concentrations, at which
oscilations peaks were found to be substantially beyond the safety limit.
In terms of duration, short lasting and long lasting concentrations have
been revealed. The short lasting ones were due to immediate distance of the
spray showing the characteristic of a systemic fault, while the long
lasting ones resulted from accomodation condition, vertical positioning
within a given ship space, distribution of air circulation rates, as well
as from operators tendency to complete the operation within the shortest
possible time, which means their shorter possible stay under the
suffocating evaporation.
Keywords: Ship, System, Paint, Space, Ventilation
- Type of paper
: Paper in proceedings
Title: Construction Dynamics and the Consumption of the Ship
Piping System
- Authors:
- Šestan, Anton (111062)
- Hriešik, Andrej (16621)
- Editors
- Franković, Bernard
Proceedings title: Zbornik Tehničkog fakulteta Rijeka br.13
Language: hrvatski
Place: Rijeka
Year: 1993
ISBN/ISSN: 0353-281x
Pages: from 145 to 150
Summary: The paper deals with the analysis of the total pipe
consumption and the pipe building in. The analysis was made in the shipyard
of 40000 tons shipping capacity. The same firm does not use the technology
of pipe work according to CAD/CAM system. The volume diameter of the pipe
system controlled by technical department with their constructions, has
also been shown. The paper also presents the dynamics of wide pipes orders
in relation to their work dynamics and shipbuilding dynamics.
Keywords: Ship, Piping, Dynamics, Building
- Type of paper
: Paper in proceedings
Title: Flexible Automation-Base for Engineering Factory
Development
- Authors:
- Hriešik, Andrej (16621)
- Editors
- Franković, Bernard
Proceedings title: Zbornik Tehničkog fakulteta Rijeka br.13
Language: hrvatski
Place: Rijeka
Year: 1993
ISBN/ISSN: 0353-281x
Pages: from 215 to 222
Summary: The paper deals with the essential characteristics of the
engineering technology based on the application of computer aided control.
Special emphasis has been laid on flexible automation of machine tools and
production lines.
By joining of know-how and capital the well-know car factories FIAT and
PEUGEOT realized superior computer aided construction for Fire 1000 engine
and its production technology on the base of flexible automation.
Keywords: Flexible Automation, Numerical Control, Fire 1000 Engine
- Type of paper
: Ph.D.
Title: Optimization of Hand Grinders Machining Systems in
Shipyard
Faculty: Tehnički fakultet Sveučilište u Rijeci
Author: ŠESTAN ANTON
Date of defense: 07/01/94
Language: hrvatski
Number of pages: 153
Summary: Results of such researching confirmed the thesis that high
frequency current driven hand grinders are generally better suited for
specific application within the ship construction process than their
pneumatic driven counterparts. The advantage of electric driven hand
grinders use is predominantly based on their significantly greater
efficiency and lower investments needed. Due to created models of machining
system function value algorithms, and criteria algorithm models for
evaluation of particular functions of objectives, the bases for design of
optimum machining system in the function of operating conditions have been
provided. Considerably lower consumption of grinding power per steel mass
unit grinded than is the case when stationary grinders are employed,
indicates that the existing procedure of grinding process automatic control
appears substantially underdeveloped with respect to development of the
optimum grinding process by means of continuous adjustment of cutting
parameters, and that by employing higher peripheral velocities of the
grinding disc, it is possible to reach substantially higher efficiency
levels for rough grinding operations.
Keywords: Hand Grinder, Compressed Air, High Frequency Current, Machining System, Grind Power and Effect, Machining System Optimum, Grinding Dynamism, Intermitency, Energy Utilizability