Cooperative machining method for large sandwich component

Abstract

The invention discloses a cooperative machining method for a large sandwich component. The method comprises the following steps of: performing scanning measurement on an actual cooperative curved surface of a face plate skin by utilizing a handheld self-positioning three-dimensional laser scanner to obtain data point clouds of the actual cooperative curved surface of the face plate skin; removingimpurity points and noise points from the point clouds, optimizing point cloud number, and performing wrapping operation on the data point clouds to generate a polygonal curved surface; performing operation such as repairing, correcting and the like on the polygonal curved surface, and establishing a grid and a curved surface by detecting curvature and an outline so as to obtain an actual cooperative curved surface computer aided design (CAD) model of the face plate skin; performing numerical control programming on the actual cooperative curved surface CAD model by utilizing CAD / computer aided manufacturing (CAM) software to generate a numerical control machining program of the surface of a sandwich; respectively machining upper and lower surfaces of the sandwich at a numerical control machining center; and bonding and curing the machined sandwich and upper and lower face plate skins. The cooperative machining method realizes the scanning measurement, data processing and numerical control machining of the large sandwich component and has low investment cost, high machining precision and high universality.

Description

technical field [0001] The invention relates to a processing technology for a large-scale sandwich structure, in particular to a processing method for large-scale sandwich components. Background technique [0002] Large-scale sandwich components are light in weight, high in strength and rigidity, sound-absorbing and heat-insulating, and are widely used in aerospace, transportation and other industries. Large-scale sandwich components are usually made of sandwiches made of composite materials and upper and lower panel skins made of aluminum alloys through fitting and bonding. In order to ensure the high quality of bonding and curing of large sandwich components, that is, the single debonding area between the panel skin and the surface of the composite material sandwich is smaller than the design requirement, so it is required that the normal fit clearance between the panel skin and the surface of the composite material sandwich before bonding and curing should be less than t...

AI Technical Summary

Problems solved by technology

[0005] 1. It requires the production and manufacture of special machine tool hosts, control systems and data processing software. The system manufacturing cycle is long and the input cost is high;

[0006] 2. The analog probe is used to automatically track and scan the inner surface of the panel skin. The measurement speed is slow, the time is long, and the number of collection points is small. The pressure of the probe finger causes deformation of the skin surface, and the wear of the ball head of the finger affects the measurement accuracy. ;

[0008] 4. The processing data is non-standard G code, which cannot be processed on other machine tools; the system function is dedicated, and the versatility is poor

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