Simulation of the Milling Process for CAM Applications

Manufacturing ◽  
2003 ◽  
Author(s):  
Mehdi Che´rif ◽  
Benoiˆt Furet ◽  
Herve´ Thomas ◽  
Jean-Yves Hascoe¨t
Keyword(s):  
Input Data ◽  
Cutting Speed ◽  
Rake Angle ◽  
Milling Process ◽  
Accurate Data ◽  
Technical Data ◽  
Aisi P20 ◽  
Cad Cam ◽  
Simulation Results ◽  
Cam Systems

CAD/CAM systems require technical data to model the tool and machined workpiece behavior during the cutting process. The large varieties of machining input data prevent exhaustive studies for each machining operation. The purpose of this paper is to analyze the most influent parameters (ie. rake angle, cutting speed and hone radius) on cutting force during the milling process in order to limit experiment testing while providing accurate data for the CAD/CAM requirement. Simulation results based on modified Altan’s approach are compared with experimental measurement for three different materials (AISI P20, AISI H11 and 2024 aeronautic alloy) and varying insert geometries (different rake angles and hone radius) are tested.

Optimization of Axial Rake Angle for Face Milling Using Taguchi Method and Finite Element Analysis

2013 ◽  
Vol 465-466 ◽  
pp. 746-750 ◽  
Author(s):  
Mohd Riduan Ibrahim ◽  
A.R. Abd. Kadir ◽  
M.S. Omar ◽  
M.H. Osman ◽  
S. Sulaiman ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Parameter ◽  
Signal To Noise Ratio ◽  
Cutting Speed ◽  
Rake Angle ◽  
Milling Process ◽  
Face Milling ◽  
Element Analysis ◽  
Confirmation Test

This study employed the Taguchi approach in combination with finite element analysis (DEFORM3D) to investigate face milling process onto AL6061. The factors studied in this investigation were cutting speed, feed rate, and axial rake angle. The simulation of flank wear was generated according to Usuis wear model though the L9(34) of the orthogonal array experiment. ANOVA analysis and F test were conducted to find the significant factor that contributes to tool wear in the signal to noise ratio. Finally, the confirmation test has been carried out at optimal parameter.

scholarly journals Simulation on cutting forces and cutting temperature in broaching of 300M steel

2019 ◽  
Vol 23 (5 Part A) ◽  
pp. 2585-2594 ◽  
Author(s):  
Changming Zhang ◽  
Anle Mu ◽  
Qi Shen ◽  
Hui Zhang
Keyword(s):  
Process Simulation ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Rake Angle ◽  
Simulation Test ◽  
300M Steel ◽  
Test Parameters ◽  
Relief Angle ◽  
Simulation Results ◽  
Single Factor Experiment

In this paper, using the method of single factor experiment, set the test parameters of 300M steel through AdvantEdge software broaching process simulation test, simulation results for the finishing, analyzed the influence of broach rake angle and relief angle, tooth lift and cutting speed on cutting force and cutting temperature in the process of broaching, observed the cutting temperature in the broaching process of regional changes, through the analysis, provides theory basis for reasonable design of the broach. The results show that the tooth lift has the greatest influence on the cutting speed, and the tooth lift and cutting speed have the greatest influence on the cutting temperature.

Observations on the Use of Computers in the Process Planning of Machined Components

1985 ◽  
Vol 9 (2) ◽  
pp. 70-74 ◽  
Author(s):  
I. Yellowley ◽  
A. Kusiak
Keyword(s):  
Process Planning ◽  
Milling Process ◽  
Machining Processes ◽  
New Approach ◽  
Cad Cam ◽  
Planning Methods ◽  
Planning Function ◽  
Realistic Problem ◽  
Cam Systems

The possibility of further integration of CAD/CAM systems is dependent upon a better understanding of the process planning function. Existing computer aids to process planning tend to stress a variant approach which does not easily allow for process evolution and optimisation. The authors describe a new approach to the optimisation of multi-operation machining processes, which should allow the pursuit of generative planning methods at higher levels of the process planning function. In order to demonstrate such an approach, the problem of optimising cost in the removal of discrete volumetric elements will be reviewed, with particular reference to the milling process. The additional problems which arise in practical cases, where several intersecting volumes must be removed are discussed. This more realistic problem is then formulated in a manner which allows the application of a simple, effective heuristic to find good results.

ANALYSIS OF THE PRICE OF THE MANUFACTURE OF BATCH PARTS FOR CNC MILLING AUXILIATED BY CAD / CAM SYSTEMS

2018 ◽  
Author(s):  
ERIC RAMALHO FERREIRA DE CARVALHO ◽  
MARCOS VINICYUS OLIVEIRA ◽  
erijanio Silva ◽  
Gutembergy Diniz ◽  
João Dehon Rocha Junior ◽  
...  
Keyword(s):  
Cnc Milling ◽  
Cad Cam ◽  
Cam Systems

scholarly journals Marginal and Internal Fit of Ceramic Prostheses Fabricated from Different Chairside CAD/CAM Systems: An In Vitro Study

2021 ◽  
Vol 11 (2) ◽  
pp. 857
Author(s):  
Keunbada Son ◽  
Kyu-Bok Lee
Keyword(s):  
Computer Aided Design ◽  
In Vitro Study ◽  
Vitro Study ◽  
Marginal Gap ◽  
Significant Difference ◽  
Cad Cam ◽  
Ceramic Crowns ◽  
Internal Fit ◽  
Cam Systems

The purpose of this in vitro study was to evaluate marginal and internal fits of ceramic crowns fabricated with chairside computer-aided design and manufacturing (CAD/CAM) systems. An experimental model based on ISO 12836:2015 was digitally scanned with different intraoral scanners (Omnicam (CEREC), EZIS PO (DDS), and CS3500 (Carestream)). Ceramic crowns were fabricated using the CAD/CAM process recommended by each system (CEREC, EZIS, and Carestream systems; N = 15). The 3-dimensional (3D) marginal and internal fit of each ceramic crown was measured using a 3D inspection software (Geomagic control X). Differences among the systems and various measurements were evaluated using the Kruskal–Wallis test. Statistically significant differences were validated using pairwise comparisons (α = 0.05). Occlusal gaps in the CEREC, EZIS, and Carestream groups were 113.0, 161.3, and 438.2 µm, respectively (p < 0.001). The axial gaps were 83.4, 78.0, and 107.9 µm, respectively. The marginal gaps were 77.8, 99.3, and 60.6 µm, respectively, and the whole gaps were 85.9, 107.3, and 214.0 µm, respectively. Significant differences were observed with the EZIS system compared with the other two systems in terms of the marginal gap sizes. The CEREC system showed no significant differences among the four measured regions. However, the EZIS and Carestream systems did show a statistically significant difference (p < 0.05). All three systems were judged to be capable of fabricating clinically acceptable prostheses, because the marginal gap, which is the most important factor in the marginal fit of prostheses, was recorded to be below 100 µm in all three systems.

Experimental investigation of a slip-line field model for a worn cutting tool

2013 ◽  
Vol 228 (8) ◽  
pp. 1398-1404 ◽  
Author(s):  
Alper Uysal ◽  
Erhan Altan
Keyword(s):  
Wear Rate ◽  
Slip Line ◽  
Field Model ◽  
Cutting Tool ◽  
Flank Wear ◽  
Cutting Speed ◽  
Chip Thickness ◽  
Rake Angle ◽  
Uncut Chip Thickness ◽  
Line Field

In this study, the slip-line field model developed for orthogonal machining with a worn cutting tool was experimentally investigated. Minimum and maximum values of five slip-line angles ( θ1, θ2, δ2, η and ψ) were calculated. The friction forces that were caused by flank wear land, chip up-curl radii and chip thicknesses were calculated by solving the model. It was specified that the friction force increased with increase in flank wear rate and uncut chip thickness and it decreased a little with increase in cutting speed and rake angle. The chip up-curl radius increased with increase in flank wear rate and it decreased with increase in uncut chip thickness. The chip thickness increased with increase in flank wear rate and uncut chip thickness. Besides, the chip thickness increased with increase in rake angle and it decreased with increase in cutting speed.

scholarly journals TMaR: a two-stage MapReduce scheduler for heterogeneous environments

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Neda Maleki ◽  
Hamid Reza Faragardi ◽  
Amir Masoud Rahmani ◽  
Mauro Conti ◽  
Jay Lofstead
Keyword(s):  
Task Scheduling ◽  
Network Traffic ◽  
Input Data ◽  
Power Reduction ◽  
Heterogeneous Environments ◽  
Two Stage ◽  
Finish Time ◽  
Remote Storage ◽  
Simulation Results

Abstract In the context of MapReduce task scheduling, many algorithms mainly focus on the scheduling of Reduce tasks with the assumption that scheduling of Map tasks is already done. However, in the cloud deployments of MapReduce, the input data is located on remote storage which indicates the importance of the scheduling of Map tasks as well. In this paper, we propose a two-stage Map and Reduce task scheduler for heterogeneous environments, called TMaR. TMaR schedules Map and Reduce tasks on the servers that minimize the task finish time in each stage, respectively. We employ a dynamic partition binder for Reduce tasks in the Reduce stage to lighten the shuffling traffic. Indeed, TMaR minimizes the makespan of a batch of tasks in heterogeneous environments while considering the network traffic. The simulation results demonstrate that TMaR outperforms Hadoop-stock and Hadoop-A in terms of makespan and network traffic and achieves by an average of 29%, 36%, and 14% performance using Wordcount, Sort, and Grep benchmarks. Besides, the power reduction of TMaR is up to 12%.

Machining Feature-Based CAD/CAPP for STEP-NC

2014 ◽  
Vol 598 ◽  
pp. 591-594 ◽  
Author(s):  
Li Yan Zhang
Keyword(s):  
Process Planning ◽  
Manufacturing Process ◽  
Data Transfer ◽  
Operation Planning ◽  
Computer Aided Process Planning ◽  
Machining Feature ◽  
Computer Aided ◽  
Cad Cam ◽  
Feature Based ◽  
Cam Systems

ISO 14649, known as STEP-NC, is new model of data transfer between CAD/CAM systems and CNC machines. In this paper, the modeling based on machining feature is proposed. The machining feature comes from the manufacturing process considering the restriction of machining technology and machining resource. Then the framework for computer aided process planning is presented, where the algorithms of operation planning is studied. The practical example has been provided and results indicate that machining feature based model can integrate with CAPP and STEP-NC seamlessly.

Design of 25-Gb/s Half-Rate Clock and Data Recovery Circuit for Optical Communication

2013 ◽  
Vol 385-386 ◽  
pp. 1278-1281 ◽  
Author(s):  
Zheng Fei Hu ◽  
Ying Mei Chen ◽  
Shao Jia Xue
Keyword(s):  
Optical Communication ◽  
Input Data ◽  
Clock And Data Recovery ◽  
Cmos Technology ◽  
Data Recovery ◽  
Phase Detector ◽  
Voltage Controlled Oscillator ◽  
Output Data ◽  
Data Phase ◽  
Simulation Results

A 25-Gb/s clock and data recovery (CDR) circuit with 1:2 demultiplexer which incorporates a quadrature LC voltage-controlled-oscillator and a half-rate bang-bang phase detector is presented in this paper. A quadrature LC VCO is presented to generate the four-phase output clocks. A half-rate phase detector including four flip-flops samples the 25-Gb/s input data every 20 ps and alignes the data phase. The 25-Gb/s data are retimed and demultiplexed into two 12.5-Gb/s output data. The CDR is designed in TSMC 65nm CMOS Technology. Simulation results show that the recovered clock exhibits a peak-to-peak jitter of 0.524ps and the recovered data exhibits a peak-to-peak jitter of 1.2ps. The CDR circuit consumes 121 mW from a 1.2 V supply.

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