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

A composite material and fiber-reinforced technology, applied in the field of cutting, can solve the problems of serious exit burrs, high temperature in the cutting area, and difficult chip removal, and achieve the effects of reducing thermal damage, improving residual stiffness, and being easy to cut.

Active Publication Date: 2016-08-10
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] Aiming at the problems of serious exit burrs, difficult chip removal and high temperature in the cutting zone in the present stage of fiber-reinforced composite material hole-making process, the invention invents a high-quality processing method of fiber-reinforced composite material with negative pressure reverse cooling

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

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Embodiment Construction

[0011] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0012] The high-quality processing method of fiber-reinforced composite materials with negative pressure reverse cooling adopts such as figure 1 In the processing system shown, the fiber-reinforced composite material workpiece is selected to be laid and cured by 20 layers of prepreg, with a thickness of 4 mm, and each layer is about 0.2 mm thick. The negative pressure cover 1 is closely attached to the upper surface 3 of the fiber reinforced composite material workpiece 2 , and the other end of the negative pressure cover 1 is connected to the main shaft 10 . Turn on the negative pressure chip removal air pump 4, adjust the flow regulating valve 5 to control the negative pressure air flow to 5L / min. At the same time, turn on the tool air pump 6, adjust the reversing valve 7, so that the air flow direction is from t...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26F1/16B26D7/18B26D7/01
CPCB26D7/018B26D7/1863B26D2007/0012B26F1/16
Inventor 贾振元王福吉钱宝伟付饶白玉郭会彬
Owner DALIAN UNIV OF TECH
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