Optimization of Abrasive Life in Ultrasonic Machining

1985 ◽  
Vol 107 (4) ◽  
pp. 361-364 ◽  
Author(s):  
S. W. Dharmadhikari ◽  
C. S. Sharma
Keyword(s):  
Production Rate ◽  
Minimum Cost ◽  
Work Conditions ◽  
Ultrasonic Machining ◽  
Objective Functions ◽  
Profit Rate ◽  
Rate Functions ◽  
Sensitivity Studies ◽  
Maximum Production Rate

Based on two models of material removal in ultrasonic machining, developed in an earlier work, conditions for optimum abrasive life for the objective functions of minimum cost per unit volume of material removed, maximum production rate and maximum profit rate are presented. A simple nomogram is designed for the determination of optimum abrasive life. Sensitivity studies of production rate and profit rate functions are presented. An illustrative example highlights the application of the analysis.

Analytical Sensitivity Studies of the Optimum Machining Conditions for Milling, Drilling, Reaming, and Tapping

1973 ◽  
Vol 95 (1) ◽  
pp. 312-316 ◽  
Author(s):  
D. S. Ermer ◽  
B. V. Shah
Keyword(s):  
Analytical Method ◽  
Single Point ◽  
Minimum Cost ◽  
Sensitivity Analyses ◽  
Analytical Sensitivity ◽  
Turning Process ◽  
Machining Conditions ◽  
Sensitivity Studies ◽  
Maximum Production Rate

An analytical method for sensitivity studies in the determination of the optimum machining conditions for the single point turning process was previously presented by Ermer and Faria [4]. In the present paper, an analytical method for sensitivity studies in the determination of the optimum machining conditions for milling, drilling, reaming and tapping is presented, assuming that the optimizing criterion is minimum cost or maximum production rate. A nomogram is given which provides a simple and efficient way to carry out quantitative sensitivity analyses.

Maximum Profit as the Criterion in the Determination of the Optimum Cutting Conditions

1966 ◽  
Vol 88 (4) ◽  
pp. 435-442 ◽  
Author(s):  
S. M. Wu ◽  
D. S. Ermer
Keyword(s):  
Production Rate ◽  
Cutting Speed ◽  
Minimum Cost ◽  
Practical Applications ◽  
Maximum Profit ◽  
Optimum Speed ◽  
Optimum Cutting ◽  
Maximum Production Rate ◽  
Selection Of

Maximum profit is an appropriate criterion for the selection of the optimum machining conditions rather than the conventional criteria of minimum cost or maximum production rate. A simple example is presented to illustrate the determination of the maximum-profit cutting speed by application of a fundamental economic principle that maximum profit occurs at the production rate where the marginal revenue equals the marginal cost. The effects of the demand function, feed, and cost and time parameters on the determination of the maximum-profit cutting speed are analyzed. Emphasis is given to the investigation of a range of optimum cutting speeds, instead of the theoretical optimum speed, for practical applications.

Study on the Method for the Optimization of Cutting Parameters

2006 ◽  
Vol 532-533 ◽  
pp. 325-328
Author(s):  
Jing Ying Zhang ◽  
Si Qin Pang ◽  
Qi Xun Yu
Keyword(s):  
Production Rate ◽  
Production Cost ◽  
Cutting Parameters ◽  
Computational Method ◽  
Profit Rate ◽  
Maximum Profit ◽  
Rate Minimum ◽  
Maximum Production Rate ◽  
Optimization Of Cutting Parameters ◽  
Very High

This article discusses the problem about the method for the optimization of cutting parameters. A newly developed computational method which is different from the former was used for the optimization of cutting parameters. This method has its advantages of the controllability of the precision and higher speed when the precision requirement of the system is not very high. It can optimize cutting parameters toward the objectives of maximum production rate, minimum production cost and maximum profit rate.

Computerized Determination and Analysis of Cost and Production Rates for Machining Operations. Part 1—Turning

1968 ◽  
Vol 90 (3) ◽  
pp. 455-466 ◽  
Author(s):  
M. Field ◽  
N. Zlatin ◽  
R. Williams ◽  
M. Kronenberg
Keyword(s):  
Machine Tool ◽  
Production Rate ◽  
Tool Life ◽  
Mathematical Expression ◽  
Minimum Cost ◽  
Rate Equations ◽  
Production Rates ◽  
Life Data ◽  
Maximum Production Rate ◽  
The Cost

Two of the most important factors in any machining operation are the cost per piece and the production rate. Equations have been developed which enable one to calculate these two factors for a given machining operation on a given part and machine tool. Generalized equations for cost and production rate are presented for turning, milling, drilling, reaming, and tapping. The items which make up the cost and production rate can be readily evaluated in each of the equations. The generalized cost per piece and production-rate equations for turning are then expanded to cover brazed and throwaway carbide tools and solid HSS tools. In order to use these equations, it is necessary to have available pertinent tool-life data for each of the tools under the actual machining conditions. Typical tool-life data have been generated and are shown here for a variety of alloys. All of the aforementioned equations have been programmed on a computer so that the cost and production rates can be readily calculated for specific parts, operations, and machine-tool combinations. The computer will print out not only the cost and production rate but also a detailed cost breakdown. A visual examination of each of the cost and production-rate factors makes possible a rapid analysis of the significance of each of the items making up the total cost and production rates. In addition, the cost and production-rate equations for turning have also been optimized. Thus calculations can be made to determine the minimum cost per piece and the maximum production rate for the cases where a mathematical expression, such as the Taylor equation, can be applied relating tool life and cutting speeds. Any projection beyond experimental data would have to be verified to serve as a guide for shop use.

Economics of Multitool Lathe Operations

1963 ◽  
Vol 85 (4) ◽  
pp. 402-404 ◽  
Author(s):  
E. M. McCullough
Keyword(s):  
Production Rate ◽  
Tool Life ◽  
Cycle Time ◽  
Minimum Cost ◽  
Spindle Speed ◽  
Maximum Production ◽  
Maximum Production Rate

The formulas for calculation of tool life for maximum production rate and tool life for minimum cost are expanded to include multitool operations and cases in which the total cycle time controlled by the spindle speed is greater than the cutting time. A modification is made to avoid use of conventional overhead rates, which are shown to be invalid in this instance.

The Determination of the Three-Point Support Design of Machine Tool Based on iSIGHT

2014 ◽  
Vol 607 ◽  
pp. 342-345
Author(s):  
Sheng Hui Zhao ◽  
Xiao Chuang Zhu ◽  
Da Wei Zhang
Keyword(s):  
Machine Tool ◽  
High Precision ◽  
Multidisciplinary Optimization ◽  
Joint Surface ◽  
Objective Functions ◽  
Multi Objective Optimization ◽  
Support Design ◽  
Optimal Position ◽  
Point Support

In order to meet the requirements of high-precision machine tool, it has been an important factor to select an appropriate way to support the bed. By building a multidisciplinary optimization (MDO) process based on iSIGHT, this article select the deformation difference of the guides and the deformation difference of the joint surface between column and bed of the machine tool as the objective functions, and then conduct a multi-objective optimization (MOO) of the positional parameters of the three-point support. Eventually the optimization result is given and the optimal position of the three-point support is determined.

Optimal Determination of Loss Rate Functions and Unit Hydrographs

1984 ◽  
Vol 20 (2) ◽  
pp. 203-214 ◽  
Author(s):  
Olcay Ünver ◽  
Larry W. Mays
Keyword(s):  
Loss Rate ◽  
Rate Functions ◽  
Unit Hydrographs

scholarly journals Minimization of Delay Costs in the Realization of Production Orders in Two-Machine System

2018 ◽  
Vol 26 (1) ◽  
pp. 14-22
Author(s):  
Robert Dylewski ◽  
Andrzej Jardzioch ◽  
Oliver Dworak
Keyword(s):  
Minimum Cost ◽  
Optimal Scheduling ◽  
Machine System ◽  
Production Orders

Abstract The article presents a new algorithm that enables the allocation of the optimal scheduling of the production orders in the two-machine system based on the minimum cost of order delays. The formulated algorithm uses the method of branch and bounds and it is a particular generalisation of the algorithm enabling for the determination of the sequence of the production orders with the minimal sum of the delays. In order to illustrate the proposed algorithm in the best way, the article contains examples accompanied by the graphical trees of solutions. The research analysing the utility of the said algorithm was conducted. The achieved results proved the usefulness of the proposed algorithm when applied to scheduling of orders. The formulated algorithm was implemented in the Matlab programme. In addition, the studies for different sets of production orders were conducted.

Determination of production rate in large surface mining areas

2004 ◽  
pp. 69-72
Author(s):  
Changsheng Ji ◽  
Songlin Xia ◽  
Youdi Zhang
Keyword(s):  
Production Rate ◽  
Surface Mining ◽  
Mining Areas

scholarly journals Step-drawdown tests in exploitation wells for thermal and mineral water – Case study from Slovenia

Geologija ◽  
2020 ◽  
Vol 63 (2) ◽  
pp. 281-294
Author(s):  
Luka Serianz ◽  
Nina Rman ◽  
Mihael Brenčič
Keyword(s):  
Performance Analysis ◽  
Production Rate ◽  
Test Performance ◽  
Mineral Water ◽  
Approximate Equation ◽  
Graphical Analysis ◽  
Well Performance ◽  
Water Wells ◽  
Technical Status ◽  
Maximum Production Rate

A comparative analysis of step-drawdown tests was performed in order to estimate the well performance in Slovenian thermal and mineral water wells. Tests were performed in 30 wells, each having its own maximum production rate determined in the concession decrees. The main focus of well performance analysis, using graphical analysis of the Jacob approximate equation, was to estimate the adequacy of the wells production rate as well as to identify possible changes in the technical status of the wells over years. 5 of total 30 wells were not included in the analysis due to technical issues during test performance. Well performance analysis includes the calculation of nonlinear well losses related to turbulent flow and linear head loss (aquifer and well) assumed to be related to laminar flow. Results indicate that the ratios between nonlinear well losses and linear head (well and aquifer) losses, in this paper referred as laminar losses, are from 6.9 % to 97.4 %. Laminar losses parameter suggests, all investigated wells were classified with either good (11 wells), medium (7 wells) or poor (7 wells) performance. The addressed analysis represents a very important basis for further thermal and mineral water extraction, e.g. optimizing the maximum allowed production rate as granted in concession decrees and diagnose potential changes in the technical status of each well

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