Knowledge creation and application of optimal tolerance distribution method for aircraft product assembly

Abstract

Purpose This paper aims to illustrate the tolerance optimization method based on the assembly accuracy constrain, precession constrain and the cost of production of the assembly product. Design/methodology/approach A tolerance optimization method is an excellent way to perform product assembly performance. The tolerance optimization method is adapted to the process analysis of the hatch and skin of an aircraft. In this paper, the tolerance optimization techniques are applied to the tolerance allocation for step difference analysis (example: step difference between aircraft cabin door and fuselage outer skin). First, a mathematical model is described to understand the relationship between manufacturing cost and tolerance cost. Second, the penalty function method is applied to form a new equation for tolerance optimization. Finally, MATLAB software is used to calculate 170 loops iteration to understand the efficiency of the new equation for tolerance optimization. Findings The tolerance optimization method is based on the assembly accuracy constrain, machinery constrain and the cost of production of the assembly product. The main finding of this paper is the lowest assembly and lowest production costs that met the product tolerance specification. Research limitations/implications This paper illustrated an efficient method of tolerance allocation for products assembly. After 170 loops iterations, it founds that the results very close to the original required tolerance. But it can easily say that the different number of loops iterations may have a different result. But optimization result must be approximate to the original tolerance requirements. Practical implications It is evident from Table 4 that the tolerance of the closed loop is 1.3999 after the tolerance distribution is completed, which is less than and very close to the original tolerance of 1.40; the machining precision constraint of the outer skin of the cabin door and the fuselage is satisfied, and the assembly precision constraint of the closed loop is satisfied. Originality/value The research may support further research studies to minimize cost tolerance allocation using tolerance cost optimization techniques, which must meet the given constrain accuracy for assembly products.

An integrated hybrid approach for assembly tolerance transfer and allocation

“…The FEA and the Kriging-based metamodeling technique were used to consider uncertainty effects. In this framework, Miah et al (2022) developed a tolerance optimization method for aircraft product assembly based on the assembly accuracy constrain, precession constrain and the total production cost of the assembly product. Besides, lots of tolerance allocation methods were proposed in the past several decades for both the machining parts and sheet metal parts (Rezaei Aderiani et al, 2021).…”

“…The FEA and the Kriging-based metamodeling technique were used to consider uncertainty effects. In this framework, Miah et al. (2022) developed a tolerance optimization method for aircraft product assembly based on the assembly accuracy constrain, precession constrain and the total production cost of the assembly product.…”

The Role of Personal Commitment in Association Between Aerospace Education and Service Experience Through Quality Design: A Moderated Mediation Model

“…It is of paramount importance for students to have a feeling of achievement, motivation, commitment and satisfaction during knowledge acquisition because this affects their output in terms of quality designs. Knowledge is a set of theoretical understandings that teaches reasoning and techniques [16] to students. Satisfaction of students when knowledge is provided can be through the learning environment, resources used and facilitators who have a link the input as well as the output of the students.…”

Accuracy compensation method with the combined dissimilar measurement devices for enhanced measurement quality: a digital aircraft assembly technology

“…The digital tooling coordination system yields enhanced accuracy and efficiency in aircraft assembly, simultaneously curtailing assembly time and costs. This technological shift not only reflects the industry’s embrace of progress but also holds the promise of fostering safer and more economical aviation practices (Mei and Maropoulos, 2014; Miah et al , 2022). In the realm of modern manufacturing, the widespread adoption of digital measurement techniques is driven by their unmatched precision and efficiency.…”