A drilling method for high-hardness fiber-reinforced ceramic matrix composite parts

A fiber-reinforced and composite material technology, applied in drilling/drilling equipment, tools for lathes, workpieces, etc., can solve the problems of harsh cooling conditions, poor thermal conductivity, tearing, etc., and improve drilling efficiency and machining surface quality, improving cutting performance and service life, and improving cutting performance and service life

Active Publication Date: 2020-04-10
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, ceramic matrix composites based on silicon dioxide, silicon nitride, and silicon carbide and reinforced by continuous fibers are typical difficult-to-process materials. This material has high hardness, anisotropy, high strength, poor thermal conductivity, and harsh processing and cooling conditions. and other characteristics, fiber reinforced ceramic matrix composites are prone to defects such as tearing, delamination, wire drawing, burrs, and collapse in the traditional processing process, which will lead to large surface roughness of the workpiece. Due to the difficulty in dimensional control, even lead to workpiece scrapping

Method used

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  • A drilling method for high-hardness fiber-reinforced ceramic matrix composite parts
  • A drilling method for high-hardness fiber-reinforced ceramic matrix composite parts
  • A drilling method for high-hardness fiber-reinforced ceramic matrix composite parts

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Embodiment

[0039] Such as figure 1 , figure 2 and image 3 As shown, the drilling process of the variable-wall thickness thin-walled box-shaped parts of high-hardness fiber-reinforced ceramic matrix composites includes the following steps:

[0040] (1) Design and manufacture integral sintered PCD drills suitable for drilling high hardness fiber reinforced ceramic matrix composites, such as figure 1As shown, among them, the integral sintered PCD drill is to open a 0.3mm wide transverse groove 2 on the solid carbide drill blank 1, inject the diamond powder into the groove after mixing with the binder, and sinter it under high temperature and high pressure to develop and shape it. Get the PCD drill bit blank with "sandwich" structure, and then grind the drill tip into the required geometric shape according to the material matching. Take the geometric parameters of integral sintered PCD drill bit with a diameter of Φ8.5mm as an example: the top angle of the drill bit is 120°, the helix a...

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Abstract

The invention relates to a drill bit for drilling a high-hardness fiber-reinforced ceramic matrix composite material piece and a drilling method, and belongs to the field of composite material mechanical machining. According to the drill bit and the method, the drilling machining efficiency and the machining surface quality of the high-hardness fiber-reinforced ceramic matrix composite material are improved, the cutting performance and the service life of the PCD drill bit are improved as well, and manufacturing and application requirements for low damage, high precision and high efficiency from high-hardness fiber-reinforced ceramic matrix composite material are met.

Description

technical field [0001] The invention relates to a drill bit and a drilling method for drilling a high-hardness fiber-reinforced ceramic-matrix composite material, in particular to a low-damage, high-efficiency, high-hardness, anisotropic continuous fiber-reinforced ceramic-matrix composite material. A high-precision drilling process method belongs to the field of mechanical processing of composite materials. The high-hardness fiber-reinforced ceramic matrix composite material refers to a ceramic matrix composite material that uses silicon dioxide, silicon nitride or silicon carbide as a matrix and is reinforced by continuous fibers. . Background technique [0002] Fiber-reinforced ceramic matrix composites are introduced into the ceramic matrix as a second phase of continuous fiber as a reinforcing material, which has low density, high specific strength, high specific modulus, excellent thermomechanical properties and thermal shock resistance, ablation resistance and Excell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B35/00B23B51/02B23P15/32
CPCB23B35/00B23B51/02B23B2226/27B23B2251/04B23B2251/043B23P15/32
Inventor 宋楠徐亮陈旭辉王新永王松韩军
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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