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A low-damage turning method for fine internal threads of ceramic matrix composites

A composite material and internal thread technology, applied in stone processing tools, stone processing equipment, work accessories, etc., can solve the problems of high-end aerospace equipment service performance safety hazards, inability to repair multi-scale processing damage, etc., to meet surface integrity Requirement, improvement of tooth shape retention rate, and effect of avoiding damage

Active Publication Date: 2022-07-29
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although composite materials have excellent thermophysical properties, their unique characteristics such as heterogeneity and anisotropy make it easy to produce irreparable multi-scale processing damage in the process of drilling and threading. The high reliability and long life service performance bring safety hazards
At present, there is no suitable thread processing method that can reduce material damage, improve the surface quality of the thread, and thus increase the service life of the thread

Method used

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  • A low-damage turning method for fine internal threads of ceramic matrix composites
  • A low-damage turning method for fine internal threads of ceramic matrix composites
  • A low-damage turning method for fine internal threads of ceramic matrix composites

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Experimental program
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Effect test

Embodiment

[0039] The processing object is ceramic matrix composite material M10×1.5-6H internal thread products.

[0040] (1) Design and prepare a polycrystalline diamond (PCD) tool for machining fine internal threads of ceramic matrix composites. Among them, the turning tool head is made of PCD material, and the cutter body is made of K10 cemented carbide material, which is firm and reliable through welding. The total length of the internal thread turning tool is 90mm, the diameter of the tool body is 10mm, and the length of the tool body is 72mm; the distance from the tool tip to the tool axis is 4mm, and the tool tip fillet R=0.11mm.

[0041](2) The polycrystalline diamond (PCD) tool used for machining the fine internal thread of the ceramic matrix composite material roughed the thread according to the internal thread turning process. The pitch of the product is connected with a fine internal thread, and the rotation direction is the positive direction. The entire turning process i...

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Abstract

The invention relates to a low-damage turning method for fine internal threads of ceramic matrix composite materials, which belongs to the field of composite material machining. 2. Roughly machine the fine internal thread by using a polycrystalline diamond tool with a variable rotational speed and variable depth of cut tool path; Step 3. Use the polycrystalline diamond tool to finish the fine internal thread and form it; The turning process parameters are optimized, and the tooth profile retention rate, product qualification rate and processing efficiency of ceramic matrix composite micro-threads have been significantly improved, which better meets the urgent processing needs of high-precision, low-damage and high-efficiency threaded connection products. .

Description

technical field [0001] The invention belongs to the field of composite material machining, and relates to a low-damage turning method for fine internal threads of a ceramic matrix composite material. Background technique [0002] In recent years, ceramic matrix composite threaded connection structural parts have been widely used and developed in engineering. In order to connect and fix various structures, it is often necessary to use a large number of threaded connections on the material structure. In the application of large-scale structures, the connection technology of composite materials, especially the screw-fastening technology of composite materials, has become one of the key technologies for manufacturing high-reliability large-scale components. Compared with metal fasteners, composite threaded fasteners can maintain better stiffness and strength in high-temperature oxidative environments, and can better match composite structural parts of the same material. With t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28D1/16B28D7/00
CPCB28D1/16B28D7/005
Inventor 徐亮刘宏瑞王新永王凯李军平王金明王松陈旭辉宋楠韩军严伟容
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH