CFRP and titanium alloy laminated structure reamer service life prediction method

Abstract

The invention provides a CFRP and titanium alloy laminated structure reamer service life prediction method, and relates to the technical field of carbon fiber composite material and titanium alloy lamination assembly. The method comprises the steps: building a CFRP and titanium alloy laminated structure reaming aperture size error analysis model and a reamer rear flank surface abrasion (AB value) analysis model; evaluating the service life of a reamer through various types of indexes, and giving comprehensive consideration to the two constraints: the aperture size precision of a laminated structure in a reaming process and the flank abrasion of the reamer; and predicting and analyzing the effective service life of the reamer according to the current structure parameters and perforation technological parameters of the reamer. The method provided by the invention is high in accuracy of a prediction result of the service life of the reamer, can effectively predict the maximum reaming number of the laminated structure, reduces the unqualified ratio and rejection rate because of the exceeding of the service life of the reamer, and enables the reamer to give full play to the maximum reaming capability.

Description

technical field [0001] The invention relates to the technical field of laminated assembly of carbon fiber composite material and titanium alloy, in particular to a method for predicting the service life of a reaming tool with a laminated structure of CFRP and titanium alloy. Background technique [0002] Carbon fiber composite material (CFRP) has a series of advantages such as low density, high strength, high specific strength, and good vibration absorption, and has been widely used in aerospace, automobile, missile and other fields. For example, 90% of the fuselage surface of the Boeing 787 is made of carbon fiber composite materials. my country's new aviation aircraft is also gradually increasing the proportion of carbon fiber composite materials used. The application ratio of aviation aircraft composite materials and titanium alloys has become an important indicator to measure its advanced nature. one. [0003] With the widespread use of carbon fiber composite materials i...

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Problems solved by technology

These prediction methods have the following deficiencies: (1) The existing prediction methods are only applicable to the single reaming condition of carbon fiber composite materials, and no effective reamer life prediction method under the condition of reaming of carbon fiber composite materials and titanium alloy laminated structures is proposed. Considering the effect of titanium alloy material on reaming tool wear during the reaming process of laminated structure and the hindering effect of composite materials on titanium alloy reaming chip removal, these prediction methods are not suitable for laminated structures; (2) Existing prediction methods The service life is predicted based on a single tool life evaluation index, and the prediction results cannot comprehensively reflect the hole diameter error and tool flank wear in the reaming process after reaching the service life limit

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