Prediction method of service life of drilling tool with CFRP(carbon fiber reinforced plastic) and titanium alloy laminated structure

Abstract

The invention provides a prediction method of service life of a drilling tool with CFRP(carbon fiber reinforced plastic) and titanium alloy laminated structure, and relates to the technical field of carbon fiber composite material and titanium alloy laminated assembling. According to the prediction method, a carbon fiber composite material and titanium alloy laminated structure drilling dynamic real-time cutting force analysis module, a composite material lamination defect analysis module, a composite material tearing defect analysis module, and a drill bit back cutting side attrition value analysis model are built, and the effective service life of the drill bit is predicted and analyzed according to current drill bit structure parameter and drilling process parameter. The prominent problem that service life of the drilling tool with CFRP and titanium alloy laminated structure is not easy to predict accurately so that the low qualification rate and the high part scrap rate are caused due to the fact that effective service life of the tool is exceeded is solved; the composite material drilling defect and the drilling tool back cutting side abrasion are taken into consideration comprehensively, the maximum hole drilling quality of the laminated structure can be predicted effectively, the part scrap rate caused by exceeding of the service life of the tool is reduced, and the highest drilling effect of the tool is achieved.

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 drilling 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 ...

AI Technical Summary

Problems solved by technology

These prediction methods have the following deficiencies: (1) The existing prediction methods are only applicable to the drilling conditions of carbon fiber composite materials alone, and no effective drill bit life prediction method has been proposed under the drilling conditions of carbon fiber composite materials and titanium alloy laminated structures

These prediction methods are not suitable for laminated structures because they do not consider the impact of titanium alloy materials on drilling tool wear during the drilling process of laminated structures and the impact of composite materials on titanium alloy drilling chip removal; (2) the existing The prediction method is based on a single tool life evaluation index to predict the service life. The prediction results cannot comprehensively reflect the composite material defects and the tool flank wear in the drilling process after reaching the service life limit.

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