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Machining method of C/SiC ceramic matrix composite novel trapezoidal thread

A trapezoidal thread and composite material technology, applied in metal processing equipment, manufacturing tools, thread cutting machines, etc., can solve the problems of service performance quality risk, poor anisotropic thermal conductivity, small tooth structure size, etc., and achieve excellent cutting matching , Cutting performance and life improvement, the effect of high tooth root strength

Active Publication Date: 2021-06-22
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, C / SiC ceramic matrix composites pose great challenges to the processing technology due to their high hardness, high brittleness, anisotropy, heterogeneity and poor thermal conductivity. Cutting force, tool life and tool reliability need to be considered comprehensively during processing and other difficult problems
Due to the small size of the thread structure, low thread strength, and the unique anisotropy of the material, the ordinary thread structure is prone to irreparable processing damage such as thread breakage and tooth profile out-of-tolerance during thread processing. The high reliability and long life service performance bring quality risks and safety hazards

Method used

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  • Machining method of C/SiC ceramic matrix composite novel trapezoidal thread
  • Machining method of C/SiC ceramic matrix composite novel trapezoidal thread
  • Machining method of C/SiC ceramic matrix composite novel trapezoidal thread

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Embodiment

[0047] The processing object is an orthogonal three-way C fiber C / SiC ceramic matrix composite material Tr8×1.5-7e threaded connector, and the processing method is profiling dry cutting.

[0048] (1) Design a metric trapezoidal thread structure with an angle of 30°, an accuracy of 7e, and a major diameter of trail for The thread direction is right-handed.

[0049] (2) Design and manufacture integral diamond variable diameter round nose milling cutter and electroplated diamond thread milling cutter. Among them, the structure of the integral diamond round nose milling cutter is an integral type. The base of the cutter bar is made of nano-tungsten carbide-cobalt carbide, the blade is made of artificial polycrystalline diamond (PCD), and the blade and the cutter bar are brazed by high-frequency induction. The diameter is Φ9.75mm, the blade rotation diameter is Φ10mm, the number of blades is 2, and the radius R of the blade tip is 0.798mm. The diamond raw material used in the ...

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Abstract

The invention relates to a machining method of a C / SiC ceramic matrix composite novel trapezoidal thread. The machining method comprises the steps of (1) designing an integral variable-diameter diamond round-nose milling cutter and an electroplated diamond thread milling cutter by taking the thread form of a trapezoidal thread as a standard; (2) machining a large diameter of the trapezoidal thread by utilizing the integral variable-diameter diamond round-nose milling cutter designed in the step (1); (3) conducting rough machining on the thread according to a thread non-instantaneous-center envelope machining process and a variable-feed-rate and variable-cutting-depth cutter path design method by utilizing the electroplated diamond thread milling cutter designed in the step (1); and (4) conducting finish machining on the thread according to the non-instantaneous-center envelope machining process by utilizing the electroplated diamond thread milling cutter designed in the step (1).

Description

technical field [0001] The invention relates to a structural design and processing method of a new trapezoidal thread, in particular to a structural design and high precision of a new trapezoidal thread of a high hardness, high brittleness, heterogeneity and anisotropy C / SiC ceramic matrix composite material. The low-damage processing technology belongs to the field of precision machining of composite materials. Background technique [0002] In recent years, C / SiC ceramic matrix composites reinforced with 2D or 3D fiber braided or woven structures have been widely used in the aerospace field due to their excellent properties such as good integrity, strong designability, high temperature resistance and damage resistance. [0003] With the wide application and development of C / SiC ceramic matrix composite threaded connection structural parts, C / SiC ceramic matrix composite material connection technology, especially C / SiC ceramic matrix composite material thread fastening techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23G1/32
CPCB23G1/32
Inventor 徐亮高翔王新永刘宏瑞王凯李军平王金明王松陈旭辉宋楠韩军严伟
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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