Quality evaluation method of CFRP cut and machined surface at full-range fiber orientation angle

Abstract

The invention relates to a quality evaluation method of a CFRP (Carbon Fiber Reinforced Polymer) cut and machined surface at a full-range fiber orientation angle. The method comprises the following steps: acquiring the CFRP cut and machined surface at the full-range fiber orientation angle by performing annular milling on a CFRP disc workpiece, and performing quality evaluation on the CFRP cut and machined surface at different fiber orientation angles; during milling machining, acquiring the cut and machined surface and measuring the surface roughness of the cut and machined surface, wherein the tool path is a circular trace taking the center of the disc workpiece as the circle center; taking optical microscope pictures to be spliced to form an image of the cut and machined surface at the full-range fiber orientation angle of 0-180 degrees; measuring the burr height of the cut and machined surface at different fiber orientation angles; finally acquiring burr height factors of the surface at the full-range fiber orientation angle and evaluating the quality of the CFRP cut and machined surface according to the burr height factors. According to the quality evaluation method of the CFRP cut and machined surface at the full-range fiber orientation angle, only by a one-step milling and machining test, the CFRP cut and machined surface at the full-range fiber orientation angle of 0-180 degrees can be obtained, and quality evaluation can be performed on the CFRP cut and machined surface.

Description

technical field [0001] The invention relates to a method for evaluating the cutting processing quality of carbon fiber reinforced composite materials, in particular to a method for evaluating the cutting processing surface quality of CFRP based on the full-range fiber direction angle of the ring milling test, and belongs to the technical field of mechanical processing. Background technique [0002] Carbon Fiber Reinforced Polymer (CFRP for short) has been widely used in the aerospace field due to its light weight, high specific strength, high specific stiffness, corrosion resistance, and low thermal expansion coefficient. The physical and mechanical properties of CFRP have strong anisotropy characteristics, which makes CFRP a typical difficult-to-process material. Unlike isotropic metal materials, processing defects such as delamination, burrs, resin burns, fiber extraction, and surface pits are prone to occur in the cutting process of CFRP, and the processing quality is dif...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a full range of fiber orientation for the current CFRP cutting surface quality evaluation can only rely on repeated tests to complete, and can only evaluate the cutting surface quality under a single fiber direction angle The evaluation method of the surface quality of the CFRP cutting process of the angle, through the innovative cutting process test method, the cutting process surface of the carbon fiber reinforced composite material with a full range of fiber direction angles of 0 to 180° can be obtained and the quality evaluation can be carried out through a milling process test

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