Negative pressure reverse cooling-adopted high-quality processing method for fiber reinforced composite

Abstract

The invention discloses a negative pressure reverse cooling-adopted high-quality processing method for a fiber reinforced composite, belongs to the technical field of cutting processing, and relates to a processing method for high-quality drilling and hole making of the fiber reinforced composite. The method is characterized in that different cooling technologies are implemented when different positions of the fiber reinforced composite formed through laying and curing a plurality of layers of prepregs are drilled. The method comprises the steps that firstly, a negative pressure cover is attached to the surface of the composite during the fiber reinforced composite hole making process; negative pressure is generated in the negative pressure cover and a drilling hole cavity through utilizing an air pump; drilling dust and cuttings are quickly collected; positive pressure is generated around a drill internal cooling hole through utilizing a cutter air pump, as as to help cooling the cuttings; and when the last layers of the material are drilled, the drill internal cooling hole performs negative pressure suction instead of positive pressure ventilation, relatively high negative pressure is generated for the material at the outlet part, support is provided for the drilling process, and a drill cutting edge is enabled to cut fibers. According to the method, defects such as burrs and delamination are effectively reduced, and the fiber reinforced composite is drilled and processed at high quality.

Description

technical field [0001] The invention belongs to the technical field of cutting processing, and relates to a processing method for high-quality drilling and hole making of fiber-reinforced composite materials. Background technique [0002] Fiber-reinforced composite materials have gradually replaced metals and are widely used in various engineering fields due to their excellent properties such as light weight and high strength. For example, aramid fiber-reinforced composite materials and carbon fiber-reinforced composite materials have been used to manufacture aircraft large-scale structural parts. Although fiber-reinforced composites are usually near-net-shaped during the manufacturing process, a large number of holes are still required in the final assembly process of the parts, and riveting, bolting, etc. are performed. Since the fiber-reinforced composite material is composed of a matrix and a fiber-reinforced phase, the material itself is anisotropic, and the bonding str...

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