A Three-step Statistical Experimental Design Method for Optimizing Process Parameters in Riveting Process
A technology for process parameter optimization and process parameter application in computing, electrical digital data processing, special data processing applications, etc., which can solve problems such as cross-influence of riveting quality
Inactive Publication Date: 2017-02-15
INNER MONGOLIA UNIV OF SCI & TECH
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[0004] The purpose of the present invention is to provide a three-step statistical experimental design method for optimizing the process parameters of the riveting process, which solves the problem of combination selection of the process parameters of the multi-riveting process and solves the cross influence of the process parameters of the multi-riveting process on the quality of the riveting
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Embodiment 1
[0037] Here, taking the lap joint structure of MS2047AD6-6 rivets and 2.286mm thick aluminum alloy plate as an example, the optimization process of the combined feasible domain of process parameters in multi-riveting process is illustrated.
[0038] (1) After consulting the manual ─ ─ "Standard Aircraft Handbook for Mechanics and Technicians", it is determined that the riveted lap joint structure of the MS2047AD6-6 rivet and the 2.286mm thick aluminum alloy plate corresponds to the recommended value range of the target value range of the rivet head height H and diameter D The values are: H: (1.9844mm ~3.175mm), D: (6.35mm ~8.73125mm). At the same time, according to the rivet compression process and the characteristics of the lap joint structure, the selection and initial value of the process parameters of the riveting process are designed as follows:
[0039] - Riveting force: The actual loaded riveting force is directly derived from the specifications of the riveting pressure...
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The invention relates to an optimizing method for riveting process technical parameters through a three-step statistical experiment design. The optimizing method is characterized by comprising the following steps: firstly, by taking riveting quality actual monitoring indexes, namely the height and the diameter of a rivet pier head as to-be-optimized objects, screening the riveting process technical parameters, which remarkably influence the height and the diameter of the rivet pier head and judging the validity of the initial design ranges of corresponding parameters by using the factorial experiment design; secondly, correcting the invalid initial design range of sensitive riveting process technical parameters through the gradient experiment design; further deriving a statistical model of the sensitive riveting process technical parameters relative to the height and the diameter of the rivet pier head through the center composite experiment design; finally, realizing the search on all sensitive riveting process technical parameter combination feasible regions which simultaneously meet the constraint of target value ranges of the height and the diameter of the rivet pier head in a feasible region overlapping mode, and optimizing the riveting process technical parameter combination feasible regions from aspects of improving the manufacturability of a rivet and the size of a rivet hole and reducing the control difficulty of riveting force.
Description
technical field [0001] The invention relates to a three-step statistical experiment design method for optimizing technological parameters of a riveting process, which is used for optimizing technological parameters of a technological riveting process. Background technique [0002] Rivet lap joints are widely used in the structural design of aircraft. The riveting process also means the plastic deformation process of the rivet under pressure. The long-term thinking of riveting quality analysis has made researchers accustomed to directly studying the influence of different riveting process parameters on riveting quality, such as riveting residual stress distribution, riveting crack generation and growth, fatigue life prediction, etc. However, in the actual riveting quality monitoring process, it is obviously not feasible to carry out stress and crack detection for all riveted structures. Considering the correlation between the riveting quality and the clamping constraints of ...
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IPC IPC(8): G06F17/50
Inventor 王少锋洪军高琳张恩慧
Owner INNER MONGOLIA UNIV OF SCI & TECH