Process Tolerance Control in a 2D Angular Tolerance Chart

Ji, Ping; Xue, Juan

doi:10.1007/s001700200202

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…Xue and Ji (2001) proposed a methodology for dealing with angular features in tolerance charting. Ji and Xue (2002) obtained the mean working dimensions from the reverse chain matrix containing reverse tolerance chains. Huang et al (2005) devised a procedure for determining the process tolerances directly from multiple correlated critical tolerances in an assembly.…”

Section: Literature Reviewmentioning

confidence: 99%

Process-based tolerance assessment of connecting rod machining process

Sharma¹,

Rao

Babu

2016

J Ind Eng Int

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Process tolerancing based on the process capability studies is the optimistic and pragmatic approach of determining the manufacturing process tolerances. On adopting the define-measure-analyze-improve-control approach, the process potential capability index (C p ) and the process performance capability index (C pk ) values of identified process characteristics of connecting rod machining process are achieved to be greater than the industry benchmark of 1.33, i.e., four sigma level. The tolerance chain diagram methodology is applied to the connecting rod in order to verify the manufacturing process tolerances at various operations of the connecting rod manufacturing process. This paper bridges the gap between the existing dimensional tolerances obtained via tolerance charting and process capability studies of the connecting rod component. Finally, the process tolerancing comparison has been done by adopting a tolerance capability expert software.

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Section: Literature Reviewmentioning

confidence: 99%

Process-based tolerance assessment of connecting rod machining process

Sharma¹,

Rao

Babu

2016

J Ind Eng Int

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“…Gonzalez et al [5] proposed an equivalent conversion of dimensional tolerances in two dimensions, established a dimensional model from a two-dimensional dimensional diagram to a two-dimensional dimensional chain containing dimensional, angular and directional tolerances, and evaluated the equivalent tolerances by considering the theory of accumulation of variance and the theory of accumulation of deviation. P. Ji et al [6] proposed a computational method of calculating the average working dimensions in the inverse direction, which was obtained by using an algebraic approach in which the inverse chain matrix containing the inverse tolerance chain and the forward chain matrix of the forward tolerance chain are derived from the inverse chain matrix, which in turn assigns the tolerances to the dimensional work size. Li et al [7] investigated the circular dimensional chain and the parallel chain in the machining dimensional chain to provide a generalized solution for the dimensional problems in the machining process.…”

Section: Introductionmentioning

confidence: 99%

“…The above studies play an important role in the analysis and calculation of planar dimensional chain, but these methods are only up to the dimensional relationship, and cannot cover the detailed description of the process sequence and machining datum [4,6,7]; at the same time, the drawing of the dimensional chain diagrams are cumbersome, and the identification of increase and decrease in the loop is prone to errors, and the computation process is complicated, which is not conducive to the computer-aided design [11,12]; the manual computation is time-consuming and low-efficiency, and the artificial errors can easily affect the accuracy of calculation [5,8]. In the face of these limitations, this paper carries out an in-depth study on the calculation of process dimensions of the hole system during the machining of porous parts, using CATIA CAA technology to carry out research and development based on the combination of process paths and design paths to analyze hole system dimensions, and the main content of the study is shown in Figure 1:…”

Section: Introductionmentioning

confidence: 99%

A Novel Hole System Dimension Analysis Tool Based on the Combination of the Process Path and Design Path

Ma,

Yang,

Xue

et al. 2024

Machines

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In the calculation of process dimensions in the machining of porous parts, the traditional method is complicated in the establishment of the dimensional chain, it is easy to make mistakes in the judgment of increasing and decreasing loops, and there is difficulty in the calculation process; thus, this paper puts forward a method that combines the process path with the design path to analyze the hole system dimensions in response to these problems. First of all, the combination of the process path and design path is used to establish a system of vector equations and, according to the system of vector equations, to establish a matrix model to calculate the process dimensions based on the system of vector equations to construct the process dimensional chain and the dimensional chain function; then, the principle of differentiation is used to carry out a tolerance analysis of the process dimensions, which avoids the drawing of dimensional chain diagrams and the judgement of the incremental/decremental loops. Finally, the development of a process dimension analysis tool for hole system dimensions is completed based on CATIA CAA. In order to verify the effectiveness of the proposed method, the analysis tool was used to solve the three labeling methods of the hole system dimensions of porous parts and compared with the results calculated using the traditional method, and it was found that some of the tolerance results obtained by the proposed method were enlarged by about 50%, which is more in line with the actual production situation. Finally, in order to verify the accuracy of the tool’s calculation results, three porous parts were machined according to the process dimensions and tolerances calculated by the tool, and the center distance of each hole was measured by a coordinate meter. These measurements were compared and analyzed with the design dimensions specified in the engineering drawings, and it was found that the center distances of the holes were in full compliance with the design requirements.

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An improved tolerance charting technique using an analysis of setup capability

Contreras

2012

Int J Adv Manuf Technol

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Process Tolerance Control in a 2D Angular Tolerance Chart

Cited by 4 publications

References 14 publications

Process-based tolerance assessment of connecting rod machining process

Process-based tolerance assessment of connecting rod machining process

A Novel Hole System Dimension Analysis Tool Based on the Combination of the Process Path and Design Path

An improved tolerance charting technique using an analysis of setup capability

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