An Optimization of Automated Process Planning for Manufacturing Prismatic Parts on a Machining Center

2015 ◽  
Vol 789-790 ◽  
pp. 1270-1274
Author(s):  
Janjira Kongchuenjai ◽  
Suksan Prombanpong
Keyword(s):  
Mathematical Model ◽  
Process Planning ◽  
Cutting Tools ◽  
Cnc Machining ◽  
Total Production ◽  
Machining Time ◽  
Optimal Sequence ◽  
Machining Center ◽  
Prismatic Parts ◽  
The Mathematical Model

One of the objectives of process planning optimization is to diminish machining time. Nowadays a lot of research papers presented different algorithms to solve this classic problem. Thus, the optimal sequence of parts in the machining operations by considering fixture faces, part faces, number of operations and number of tools is presented in this paper. The mathematical model based on the integer linear programming is developed to minimize the total production time of the prismatic parts manufactured on a CNC machining center equipped with the tombstone-type fixture. The time required for machining, tool traveling and tool changing is taken into consideration under relevant constraints such as precedence, fixture and available cutting tools. The optimal process plan can be obtained from the mathematical model and it is considered practical and acceptable.

Integrated Feature Modeller for Certain Manufacturing Processes

2005 ◽  
Author(s):  
C. Jebaraj ◽  
D. Kingsly Jeba Singh
Keyword(s):  
Process Planning ◽  
Cutting Tools ◽  
Manufacturing Processes ◽  
Second Phase ◽  
Optimal Sequence ◽  
Planning Stage ◽  
System Maps ◽  
Feature Based ◽  
Manufacturing Applications ◽  
Feature Based Design

This work explains the development of an integrated modeler, which is applied in the design-to-manufacturing stages of manufacturing processes namely machining, sheet metal processing and forging. Its system architecture is broadly divided into four modules namely, Feature Based Design (FBD), Virtual Factory Environment (VFE), Process Based Feature Mapping (PBFM) and Process Planning (PP). Feature based design is used for the design, modeling, synthesis, representation and validation of the components for manufacturing applications. New set of features namely integrated features are pre-defined as feature templates and instanced to get / derive the information required for the design-to-manufacturing stages of the components. VFE defines the factory, which provides the database for operations, machines, cutting tools, work pieces etc. The knowledge base of the developed system maps validated features of the component into operation sets in the first phase of the PBFM. Each operation in the operation sets can be executed using different machines and tools in a factory. All these possible choices are obtained in the second phase of PBFM. Genetic algorithm is used to find the optimal sequence of operations, machines and tools for different criteria in the process planning stage. This paper explains the developed system with case studies.

Mathematical modeling of a generic multi-profile form milling cutter

2012 ◽  
Vol 227 (5) ◽  
pp. 1036-1046 ◽  
Author(s):  
Mohammed Rajik Khan ◽  
Puneet Tandon
Keyword(s):  
Mathematical Model ◽  
Three Dimensional ◽  
Sculptured Surfaces ◽  
Three Dimensional Model ◽  
Machining Time ◽  
Milling Cutter ◽  
Machined Parts ◽  
Rotary Cutting ◽  
Three Dimensional Models ◽  
The Mathematical Model

In order to machine multiple sculptured surfaces with reduced machining time and high accuracy of the machined parts, shape design of a customised multi-point rotary cutting tool needs to be evolved. In the present work, a novel design of a generic multi-profile form milling cutter is developed for machining various multiple sculptured surfaces. This article describes in detail the mathematical model to design an accurate three-dimensional geometry of a generic multi-profile form milling cutter. Use of non-uniform rational B-spline curve(s) and sweep surfaces enables to control the shape of cutting flutes of the generic multi-profile form milling cutter. The article also discusses the methodology to develop a variety of cutters lying in the same conceptual family of multi-profile form milling cutter. To physically visualise the cutter and to show one of the downstream applications once a three-dimensional model of the cutter is available, one of the multi-profile form milling cutters is fabricated. The proposed methodology offers an intuitive high-quality mathematical model for a generic family of multi-profile form milling cutters, which is different from the traditional three-dimensional models.

scholarly journals An Estimation of Dates Production Function in Karbala Governorate For The Agricultural Season 2020 (Al-jadual Al-gharby District A case Study)

2021 ◽  
Vol 923 (1) ◽  
pp. 012070
Author(s):  
Sadeq H. Hussein ◽  
Hayder Hamed Blaw
Keyword(s):  
Mathematical Model ◽  
Least Squares ◽  
Production Function ◽  
Returns To Scale ◽  
Ordinary Least Squares ◽  
Total Production ◽  
Logarithmic Function ◽  
The Mathematical Model

Abstract This study aimed to detect the most important factor that affects dates production. About 108 questionary forms collecttted palm orchard farmers in Karbala to estimate the dates production function in Karbala governorate for the agricultural season 2021 (the district of Al-jadual Al-Gharby). The study distributed those formmmsss for about 10% of the total palm orchards in Al-jadual Al-Gharby district of the holy governorate of Karbala. The study used the method of ordinary Least squares (OLS) to estimate the mathematical model of the function. The results showed that the double Logarithmic function in terms of its estimation of the estimated Coefficients by one unit leads to a corresponding change in the produced quality of dates and the same direction by 0.188 0.808) % respectively, and that the capital variable is more in fluently in production than the work variable. As for the total production elasticity (the sum of the partial elasticities of the resources used), which represents returns to scale, it amounted to about (0.996), which indicates a decrease in the return to scale.

Feasibility Study of Using Simultaneous Motion of Two Rotary Axes to Evaluate Machining Center: Simulation

2011 ◽  
Author(s):  
K. M. Muditha Dassanayake ◽  
Masaomi Tsutsumi ◽  
Ohta Katsunori
Keyword(s):  
Mathematical Model ◽  
Feasibility Study ◽  
Radial Direction ◽  
Rotary Table ◽  
Measuring Device ◽  
Rotary Axes ◽  
Machining Center ◽  
Double Ball Bar ◽  
Ball Bar ◽  
The Mathematical Model

In this paper, a new motion: the two rotary axes simultaneous motion was proposed and the mathematical model which was used to carryout simulations was described. The effect of each deviation on the proposed motion was identified and described one by one. A methodology to estimate all the eight deviations which inherent to tilting rotary table type machining centers was described step by step. This methodology consists of two motions: the proposed motion and C axis radial direction motion. Both the two motions used only the rotary axes. All the motions can be run on one setup. The simulations were carried out by considering that the double ball bar as the measuring device. Furthermore, number of settings which can be used for the new motion were discussed. From this study, it was confirmed that this method can be used for estimate all the eight deviations, accurately.

Manufacturability Analysis for a Flexible Manufacturing Cell

1989 ◽  
Author(s):  
M. Anjanappa ◽  
M. J. Courtright ◽  
D. K. Anand ◽  
J. A. Kirk
Keyword(s):  
Data Base ◽  
Process Planning ◽  
Cycle Time ◽  
Flexible Manufacturing ◽  
Cnc Machining ◽  
Design For Manufacturability ◽  
Flexible Manufacturing Cell ◽  
Manufacturing Cell ◽  
Machining Center ◽  
Cnc Machining Center

Abstract The conventional design to manufacture cycle time in producing a part can be reduced by eliminating design errors and difficult to machine features before process planning begins. This paper discusses the identification, development and operation of an approach which uses a data base of flexible manufacturing cell capabilities in order to analyze a design for manufacturability. Designs which the cell protocol is unable to produce are rejected, and ways in which a design may be made more producible are suggested to the user. This paper addresses issues, such as material availability, tool availability and the acheivability of tolerance, as they relate to the flexible manufacturing cell which contains a Matsuura 510V CNC machining center, a robot and simulated AGV and fixturing. An important contribution of this work, which is an integral part of the overall system protocol, is the wide variety of manufacturability constraints covered and the convenience of including it in the overall part design and process planning protocol.

Study on the Adhering Disrepair and Groove Optimization of Cutting Tools for Difficult-to-Machine Materials

2006 ◽  
Vol 315-316 ◽  
pp. 715-719 ◽  
Author(s):  
Zhen Jia Li ◽  
Yao Nan Cheng ◽  
Guang Yu Tan ◽  
Yan Bo Wang ◽  
Yi Ming Rong
Keyword(s):  
Mathematical Model ◽  
Cutting Tools ◽  
Rake Face ◽  
Machine Material ◽  
Milling Temperature ◽  
The Mathematical Model

In the course of the milling experiments with the difficult-to-machine material 3Cr-1Mo-1/4V steel, we have found the substance of the adhering disrepair. In addition, we forecast the predominant capability of the waved-edge milling insert with complex 3-D grooves by the synthetically blurry judgement. Eventually, we give the mathematical model between the milling temperature and the maximal adhering disrepair depth of the rake face, and analyze the rule that the milling temperature affects the adhering disrepair. What’s more, we testify the predominant capability of the waved-edge milling insert.

A Mathematical Model for the Tooth Geometry of Circular-Cut Spiral Bevel Gears

1991 ◽  
Vol 113 (2) ◽  
pp. 174-181 ◽  
Author(s):  
Z. H. Fong ◽  
Chung-Biau Tsay
Keyword(s):  
Mathematical Model ◽  
Cnc Machining ◽  
Tooth Contact Analysis ◽  
Spiral Bevel Gears ◽  
Bevel Gears ◽  
Finite Element Stress Analysis ◽  
Tool Setting ◽  
Spiral Bevel ◽  
The Mathematical Model ◽  
Made In

A complete tooth geometry of the circular-cut spiral bevel gears has been mathematically modeled. The mathematical model has been divided into several independent modules, each representing an individual kinematic relation or tool-setting, with examples included. A comparison with the spiraloid model has also been made in this paper. The mathematical model can be applied to simulate and calculate the tooth profiles for the Duplex Method, Helical Duplex Method, Formate Method, and Modified Roll Method for circular-cut spiral bevel gears. It can also be applied to the computer numerical controlled (CNC) machining, computer-aided finite element stress analysis, and tooth contact analysis (TCA) for the spiral bevel gear.

Optimising Automatic Tool Selection for 2½D Components

2000 ◽  
Author(s):  
T. Lim ◽  
J. Corney ◽  
J. M. Ritchie ◽  
D. E. R. Clark
Keyword(s):  
Tool Path ◽  
Selection Process ◽  
Cutting Tools ◽  
Cnc Machining ◽  
Machining Parameters ◽  
Tool Selection ◽  
Machining Time ◽  
Left Behind ◽  
Current Implementation ◽  
Automatic Tool

Abstract An important step in planning the manufacture of a component by CNC machining is the selection of cutting tools. Although it has long been known that the choice of cutter sizes can have a dramatic effect on the overall machining time, few algorithms for optimisation have been available to the production engineer. This paper describes a method for determining a theoretical optimal combination of cutting tools for machining a given set of 3D volumes or 2D profiles. The algorithm considers residual material left behind by oversized cutters and the relative clearance rates of cutters that can access the selected machining features. The current implementation of the procedure described does not give exact results because several machining parameters are not included in the selection process such as tool path length, plunge rates, etc. However, the experimental results suggest that while these factors may make changes to the absolute values calculated, they typically make only a small difference to the relative ranking of the tools. The results presented here suggest that the correct combination of tools could reduce machining times by significant amounts. Consequently the paper concludes with a discussion of how the tool path generation routines used in commercial CAM systems could be modified to achieve this.

scholarly journals REASONS FOR THE CHOICE OF THE THERMAL PIPE FOR THE COMPLEX COOLING SYSTEM OF THE COMBINED CUTTING TOOLS

2017 ◽  
Vol 2017 (1) ◽  
pp. 6-11
Author(s):  
Юрий Дубров ◽  
Yuriy Dubrov ◽  
Александр Чукарин ◽  
Дмитрий Дубров ◽  
Dmitriy Dubrov ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Phase Transitions ◽  
Heat Exchange ◽  
Cooling System ◽  
Cutting Tools ◽  
Cutting Process ◽  
Dry Cutting ◽  
Aggregate State ◽  
Duration Time ◽  
The Mathematical Model

The mathematical model of heat exchange in a cooling system of the combined cutting tools in case of dry cutting is provided. Absorption of heat is reached in case of change of aggregate state of fusible substances and is based on application of phase transitions of the first sort. As a result of the solution of a task of Stefan cutting process thermostabilization duration time is determined.

Unified Multi-Error Model for Four Types CNC Machining Center

2013 ◽  
Vol 395-396 ◽  
pp. 1162-1169
Author(s):  
Kai Guo Fan ◽  
Jian Guo Yang ◽  
Li Yan Yang
Keyword(s):  
Machine Tools ◽  
Error Model ◽  
Error Modeling ◽  
Cnc Machining ◽  
Singular Function ◽  
The Past ◽  
Machining Center ◽  
Transmission Chain ◽  
The Mathematical Model ◽  
Cnc Machining Center

The error modeling compensation method for improvement the machine tools accuracy has been extensively used in the past decades. To unify the multi-error model for four types CNC machining center, the comprehensive multi-error model of TXYZ type machining center was established based on the homogenous coordinate transformation. According to the analysis of the transmission chain, a unified multi-error model for four types machining center was established based on the Singular Function. Using the unified multi-error model, the mathematical model of four types machining center can be standardized. It is very important for unceasing development of error compensation technology.

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