scholarly journals Tolerance analysis for automobile transmission shaft based on minimum cost and reliability target

2020 ◽  
Vol 103 (4) ◽  
pp. 003685042095917
Author(s):  
Jiao Luo ◽  
Xintian Liu ◽  
Haijie Wang ◽  
Xueguang Yu ◽  
Xiaobing Yang
Keyword(s):  
Mathematical Model ◽  
Cost Reduction ◽  
Minimum Cost ◽  
Tolerance Analysis ◽  
Process Capability Index ◽  
Manufacturing Cost ◽  
Capability Index ◽  
Transmission Shaft ◽  
The Relationship ◽  
Technical Area

To design a reasonable dimensional tolerance of a transmission shaft, the higher product quality while lower manufacturing cost must be considered. This paper provides a mathematical model and a flowchart which elucidates the relationship between process capability index (PCI), reliability, tolerance and manufacturing cost, considering the characteristics of the shaft diameter, the material and manufacturing process. A 10.904% cost reduction under certain PCI range of a real case shows the effectiveness of the model and flowchart, thus it can be applied to those technical area when optimizing product design.

Capability Estimation of Geometrical Tolerance With a Material Modifier by a Hasofer–Lind Index

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Antoine S. Tahan ◽  
Jason Cauvier
Keyword(s):  
Mathematical Model ◽  
Case Studies ◽  
Process Capability ◽  
Process Capability Index ◽  
Distribution Functions ◽  
Typical Case ◽  
Geometric Tolerance ◽  
Capability Index ◽  
Material Condition ◽  
Definition Of

This paper considers a way of measuring a process capability index in order to obtain the geometric tolerance of a pattern of position elements according to the ASME Y14.5 standard. The number of elements present in the pattern, as well as its material condition (least LMC or maximum MMC), are taken into consideration during the analysis. An explicit mathematical model will be developed to identify the distribution functions (PDF and CDF) of defects on the location and diameter. Using these distributions and the Hasofer–Lind index, we will arrive at a new definition of process capability—meaning the value of tolerances that can meet the threshold of x% compliance. Finally, our method is validated using a variety of typical case studies.

Possible examinations of stone machining focused on the relationship between technological parameters and surface quality

2013 ◽  
Vol 4 (1) ◽  
pp. 63-68 ◽  
Author(s):  
Zs. Kun ◽  
I. G. Gyurika
Keyword(s):  
Surface Roughness ◽  
Metal Cutting ◽  
Cutting Speed ◽  
Theoretical Background ◽  
Motion Path ◽  
Depth Of Cut ◽  
Manufacturing Cost ◽  
Technological Parameters ◽  
The Relationship ◽  
Manufacturing Time

Abstract The stone products with different sizes, geometries and materials — like machine tool's bench, measuring machine's board or sculptures, floor tiles — can be produced automatically while the manufacturing engineer uses objective function similar to metal cutting. This function can minimise the manufacturing time or the manufacturing cost, in other cases it can maximise of the tool's life. To use several functions, manufacturing engineers need an overall theoretical background knowledge, which can give useful information about the choosing of technological parameters (e.g. feed rate, depth of cut, or cutting speed), the choosing of applicable tools or especially the choosing of the optimum motion path. A similarly important customer's requirement is the appropriate surface roughness of the machined (cut, sawn or milled) stone product. This paper's first part is about a five-month-long literature review, which summarizes in short the studies (researches and results) considered the most important by the authors. These works are about the investigation of the surface roughness of stone products in stone machining. In the second part of this paper the authors try to determine research possibilities and trends, which can help to specify the relation between the surface roughness and technological parameters. Most of the suggestions of this paper are about stone milling, which is the least investigated machining method in the world.

Temperature Influence on Performance of Oxidation Ponds

1991 ◽  
Vol 24 (5) ◽  
pp. 85-96 ◽  
Author(s):  
Qingliang Zhao ◽  
Zijie Zhang
Keyword(s):  
Mathematical Model ◽  
Temperature Influence ◽  
Field Scale ◽  
Experiment Data ◽  
Computer Technique ◽  
Oxidation Pond ◽  
Optimum Model ◽  
Oxidation Ponds ◽  
The Mathematical Model ◽  
The Relationship

By means of simulated tests of a laboratory–scale oxidation pond model, the relationship between BOD5 and temperature fluctuation was researched. Mathematical modelling for the pond's performance and K1determination were systematically described. The calculation of T–K1–CeCe/Ci) was complex but the problem was solved by utilizing computer technique in the paper, and the mathematical model which could best simulate experiment data was developed. On the basis of experiment results,the concept of plug–ratio–coefficient is also presented. Finally the optimum model recommended here was verified with the field–scale pond data.

Pulse-Width Modulated Amplifier for DC Servo System and Its Matlab Simulation

2015 ◽  
Vol 9 (1) ◽  
pp. 625-631
Author(s):  
Ma Xiaocheng ◽  
Zhang Haotian ◽  
Cheng Yiqing ◽  
Zhu Lina ◽  
Wu Dan
Keyword(s):  
Mathematical Model ◽  
Transfer Function ◽  
Input Signal ◽  
Pulse Width ◽  
Rotation Speed ◽  
Servo Motor ◽  
Matlab Simulation ◽  
Pulse Width Modulated ◽  
Signal Changes ◽  
The Relationship

This paper introduces a mathematical model for Pulse-Width Modulated Amplifier for DC Servo Motor. The relationship between pulse-width modulated (PWM) signal and reference rotation speed is specified, and a general model of motor represented by transfer function is also put forward. When the input signal changes, the rotation speed of the servo motor will change accordingly. By changing zeros and poles, transient performance of this system is discussed in detail, and optimal ranges of the parameters is recommended at the end of discussion.

A mixed control chart using process capability index

2017 ◽  
Vol 36 (2) ◽  
pp. 278-289 ◽  
Author(s):  
Muhammad Aslam ◽  
N. Khan ◽  
Liaquat Ahmad ◽  
Chi-Hyuck Jun ◽  
Jaffer Hussain
Keyword(s):  
Control Chart ◽  
Process Capability ◽  
Process Capability Index ◽  
Capability Index ◽  
Mixed Control

Indian study shows high-performance work systems (HPWS) mediate the relationship between business strategy and employees’ intention to leave

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Keyword(s):  
Business Strategy ◽  
Cost Reduction ◽  
High Performance ◽  
Intention To Leave ◽  
Business Strategies ◽  
Work Systems ◽  
Content Type ◽  
High Performance Work Systems ◽  
Mediating Role ◽  
The Relationship

Purpose This paper examines the relationship between business strategies and employees’ intention to leave (ITL), through the mediating role of high-performance work system (HPWS). Design/methodology/approach To test their hypotheses, the authors used self-administered questionnaires. They drew up a list of 600 organizations of different nature and structure operating in India that were listed by the Federation of Indian Chambers and Industry. They approved 192 organizations and sent the surveys to 960 executives. They aimed to receive a minimum of one response from an HR executive and two from non-HR executives from each one. In the end, they received 572 useable responses. Findings The study found that high-performance work systems (HPWS) mediate the relationship between business strategy and employees’ intention to leave (ITL). The two effective approaches were “quality management” and “innovation strategy”, both of which reinforced the adoption of HPWS. But a third approach, a “cost-reduction strategy”, was not shown to be positively correlated with HPWS. Another important finding was that the influence on ITL did not vary across the types, or ownership structures, of the firms. Originality/value The data has lessons for HR departments. First, it shows it is advantageous for firms hoping to retain more employees to invest in HPWS that are consistent with the values of their organizations. A second practical finding is that firms need to take into account the Indian context. A third lesson is HR practitioners should make strong efforts to communicate the goals of the HPWS to employees The study also shows firms adopting cost-reduction strategies should focus more on treating employees as resources.

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