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جستجوي مطالب

deep drawing of stainless steel 

Influence of process parameters on the

deep drawing of stainless steel

proportional valve 

Evaluation of the flow forces on a direct (single stage) proportional valve by means of a computational fluid dynamic analysis

Deep drawing of aluminium–steel tailor-welded blanks 

Deep drawing of aluminium–steel tailor-welded blanks

An investigation of tool-wear monitoring in a high-speed machining process 

An investigation of tool-wear monitoring in

a high-speed machining process

Wear mechanism of CBN cutting tool 

Wear mechanism of CBN cutting tool during high-speed machining of mold steel

face milling 

The influence of feed rate and cutting speed on the cutting forces, surface roughness and tool–chip contact length during face milling

Cutting parameter optimization to minimize production 

Cutting parameter optimization to minimize production
time in high speed turning

Performance-based optimization of multi-pass face milling operations 

Performance-based optimization of multi-pass face milling operations using Tribes

micro-EDM 

Experimental attempts of sub-micrometer order size machining using micro-EDM

The gas film in spark 

The gas film in spark assisted chemical engraving (SACE)—A key element for micro-machining applications

A review of electrochemical macro- to micro-hole drilling processes 

A review of electrochemical macro to micro-hole drilling processes

Application of micro-EDM 

Application of micro-EDM combined with high-frequency dither grinding to micro-hole machining

high-speed micro-endmilling 

Estimation of effective error parameters

in high-speed micro-endmilling

Design of low-speed aircraft 

Design of low-speed aircraft by numerical and experimental techniques developed at DPA

Using two-dimensional vibration cutting for micro-milling 

Using two-dimensional vibration cutting for micro-milling

high-speed micro-endmilling 

Modelling and analysis of pulsed Nd:YAG laser machining characteristics during micro-drilling of zirconia-ZrO2

Flow stress of AISI H13 die steel in hard machining 

Flow stress of AISI H13 die steel in hard machining

Tool wear estimation in micro-machining 

Tool wear estimation in micro-machining

Helical milling 

Helical milling: An enabling technology for

hard machining precision holes in AISI D2 tool steel

Investigation into micro abrasive intermittent jet machining 

Investigation into micro abrasive intermittent jet machining

A study of dynamic stresses in micro-drills 

A study of dynamic stresses in micro-drills under

high-speed machining

معرفی و راهنمای استفاده از ساینس دایرکت (ScienceDirect) 

معرفی و راهنمای استفاده از ساینس دایرکت (ScienceDirect)

نام شرکت Elsevier در سال 1580، زمانی که لوئیس الزویر(Lowys Elsevier) شروع به فروختن کتاب به دانشجویان کرد مطرح شد. Elsevier یکی از اولین ناشرانی است که به چاپ مجلات علمی و شرح وقایع علمی پرداخته است. شعبه اصلی Elsevier Science در آمستردام هلند می باشد.

دو Brand از معروف ترین Brand های اصلی ElsevierScience،  ناشرین Academic Press و ScienceDirect می باشند.

An image-guided mobile robotic welding system for SMAW repair processes 

An image-guided mobile robotic welding system for

SMAW repair processes

A mechanistic model of cutting force in the micro end milling process 

A mechanistic model of cutting force in

the micro end milling process

On the influence of cutting speed limitation 

On the influence of cutting speed limitation on the accuracy of

wire-EDM corner-cutting

A novel approach to production planning of flexible manufacturing systems 

A novel approach to production planning of flexible manufacturing systems using an efficient multi-objective genetic algorithm

The effect of tool geometry and cutting speed on main cutting force 

The effect of tool geometry and cutting speed on main cutting force and tool tip temperature

Prediction of workpiece elastic deflections under cutting forces in turning 

Prediction of workpiece elastic deflections under

cutting forces in turning

Development and evaluation of an on-machine optical measurement device 

Development and evaluation of an on-machine optical

measurement device

A study of EDM and ECM 

A study of EDM and ECM/ECM-lapping complex

machining technology

Tool life determination based on the measurement of wear 

Tool life determination based on the measurement of wear and tool force ratio variation

Machining of free-form surfaces 

Machining of free-form surfaces. Part II: Calibration and forces

Feedrate scheduling for indexable 

Feedrate scheduling for indexable end milling process based on an improved cutting force model

Fast modeling of conjugate gear tooth profiles 

Fast modeling of conjugate gear tooth profiles using discrete presentation by involute segments

Kinematic optimization of ball-screw transmission mechanisms 

Kinematic optimization of ball-screw transmission mechanisms

New developments in variable radius gears using constant pressure angle teeth 

New developments in variable radius gears using constant pressure angle teeth

Centrifugal load and its effects on bending strength 

Centrifugal load and its effects on bending strength and contact

strength of a high speed thin-walled spur gear with offset web

New developments in variable radius gears using constant pressure angle teeth 

New developments in variable radius gears using constant pressure angle teeth

Design and construction of a dynamometer 

Design and construction of a dynamometer for measurement of cutting forces during machining with linear motion

low-noise high endurance spiral bevel gears 

Design, manufacture, stress analysis, and experimental tests of low-noise high endurance spiral bevel gears

Autonomous form measurement on machining centers for free-form surfaces 

Autonomous form measurement on machining centers for

free-form surfaces

Precision positioning of a five degree-of-freedom planar motion stage 

Precision positioning of a five degree-of-freedom

planar motion stage

Thermal analysis for the feed drive system of a CNC machine center 

Thermal analysis for the feed drive system of a CNC machine center

A new linear encoder-like capacitive displacement sensor 

A new linear encoder-like capacitive displacement sensor

A validated model for the prediction of rotor bar failure 

A validated model for the prediction of rotor bar failure in

squirrel-cage motors using instantaneous angular speed

Spindle rotary position estimation for fast tool servo trajectory generation 

Spindle rotary position estimation for fast tool

servo trajectory generation

A ballscrew drive mechanism 

A ballscrew drive mechanism with piezo-electric nut for preload

 and motion control

A new method for measuring circular motion error of NC machine tools 

A new method and instrument for measuring circular motion error of NC machine tools

Effect of tool wear on surface finish for a case of continuous and interrupted hard turning 

Effect of tool wear on surface finish for a case of continuous and interrupted hard turning

Evolutionary programming of CNC machines  

aLaboratory for Intelligent Manufacturing Systems, University of Maribor, Smetanova ulica 17, Maribor, Slovenia
bTECOS, Slovenian Tool and Die Development Centre, Kidriceva ulica, Celje, Slovenia

Available online 26 February 2005.

Abstract
The paper proposes a new concept for programming of CNC machines. The concept based on genetic algorithms assures evolutionary generation and optimization of NC programs on the basis of CAD models of manufacturing environment. The structure, undergoing simulated evolution, is the population of NC programs. The NC programs control the machine which performs simple elementary motions. During the evolution the machine movement becomes more and more complex and intelligent solutions emerge gradually as a result of the interaction between machine movements and manufacturing environment. The examples of evolutionary programming of CNC lathe and CNC milling machine tool for different complexities of the blanks and products are presented. The proposed concept showed a high degree of universality, efficiency, and reliability and it can be also simply adopted to other CNC machines.

Keywords: Manufacturing systems; NC programming; CNC machines; Genetic algorithm
 

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