Process Tolerance Control in a 2D Angular Tolerance Chart

2002 ◽  
Vol 20 (9) ◽  
pp. 649-654 ◽  
Author(s):  
P. Ji ◽  
J. B. Xue
Keyword(s):  
Tolerance Chart ◽  
Process Tolerance ◽  
Tolerance Control

Software Development for Setup Planning of Rotational Part

2015 ◽  
Vol 4 (1) ◽  
Author(s):  
Sumit Dwivedi ◽  
Shahnawaz Alam
Keyword(s):  
Tolerance Analysis ◽  
Control Technique ◽  
Planning Problem ◽  
Setup Planning ◽  
Tolerance Chart ◽  
Efficiency And Effectiveness ◽  
Planning Algorithm ◽  
Rotational Part ◽  
Sound Foundation ◽  
Tolerance Control

An innovative approach was developed to solve the problem of setup planning, which is the most critical problem in process planning for discrete metal parts. Setup planning is the act of preparing detailed work instructions for setting up a part. The major objective of this research is to improve the performance of CAPP systems by developing a systematic approach to generate practical setup plans based on tolerance analysis. A comprehensive literature review on tolerance control in CAPP was conducted. It was found that tolerance chart analysis, a traditional tolerance control technique, is reactive in nature and can be greatly improved by solving the problem of setup planning. In order to develop a theoretically sound foundation for tolerance analysis-based setup planning, the problem of tolerance stack up in NC machining was analyzed in terms of manufacturing error analysis. Guidelines for setup planning were then developed based on the analysis. To systematically solve the setup planning problem, a graph theoretical setup planning algorithm for rotational parts was then developed for automated and integrated setup planning and fixture design. Its efficiency and effectiveness evaluated. The result is promising. The algorithms were then computerized. A setup planning program was developed under the Microsoft Windows environment using C.

Mathematical simulation of error functions of decision-making at tolerance control of measuring techniques availability

Metrologiya ◽  
2020 ◽  
pp. 3-15
Author(s):  
Rustam Z. Khayrullin ◽  
Alexey S. Kornev ◽  
Andrew A. Kostoglotov ◽  
Sergey V. Lazarenko
Keyword(s):  
Measurement Error ◽  
Geometric Interpretation ◽  
Measuring Instruments ◽  
Measured Quantity ◽  
Metrological Examination ◽  
Technical Documentation ◽  
Error Functions ◽  
Measuring Techniques ◽  
Tolerance Control ◽  
Laws Of Distribution

Analytical and computer models of false failure and undetected failure (error functions) were developed with tolerance control of the parameters of the components of the measuring technique. A geometric interpretation of the error functions as two-dimensional surfaces is given, which depend on the tolerance on the controlled parameter and the measurement error. The developed models are applicable both to theoretical laws of distribution, and to arbitrary laws of distribution of the measured quantity and measurement error. The results can be used in the development of metrological support of measuring equipment, the verification of measuring instruments, the metrological examination of technical documentation and the certification of measurement methods.

QTL mapping of rice leaf photooxidation tolerance control

2009 ◽  
Vol 17 (2) ◽  
pp. 339-342
Author(s):  
Xiao-Xia SUN ◽  
Jia-Yao DENG ◽  
Bao-Yue JIANG ◽  
Xiao-Li JIA ◽  
Wen-Xiong LIN
Keyword(s):  
Qtl Mapping ◽  
Rice Leaf ◽  
Tolerance Control

A CAD/CAM Representation Model Applied to Tolerance Transfer Methods

1998 ◽  
Author(s):  
Alain Desrochers
Keyword(s):  
Three Dimensional ◽  
Dimensional Representation ◽  
One Dimensional ◽  
Dimensional Tolerance ◽  
Representation Model ◽  
Three Dimensional Representation ◽  
Tolerance Chart ◽  
Cad Cam ◽  
Tolerance Charts

Abstract This paper presents the adaptation of tolerance transfer techniques to a model called TTRS for Technologically and Topologically Related Surfaces. According to this model, any three-dimensional part can be represented as a succession of surface associations forming a tree. Additional tolerancing information can be associated to each TTRS represented as a node on the tree. This information includes dimensional tolerances as well as tolerance chart values. Rules are then established to simulate tolerance chains or stack up along with tolerance charts directly from the graph. This way it becomes possible to combine traditional one dimensional tolerance transfer techniques with a powerful three-dimensional representation model providing high technological contents.

Proximity correction for high CD accuracy and process tolerance

1995 ◽  
Vol 27 (1-4) ◽  
pp. 179-182 ◽  
Author(s):  
T. Waas ◽  
H. Eisenmann ◽  
O. Vo¨llinger ◽  
H. Hartmann
Keyword(s):  
Process Tolerance
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