A new type of trapezoidal thread processing method of c/sic ceramic matrix composite material

A technology of trapezoidal threads and composite materials, applied in metal processing equipment, manufacturing tools, thread cutting machines, etc., can solve problems such as poor anisotropic thermal conductivity, service performance quality risk, small tooth structure size, etc., to achieve cutting performance and service life Improvement, excellent cutting matching, and high tooth root strength

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

[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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  • A new type of trapezoidal thread processing method of c/sic ceramic matrix composite material
  • A new type of trapezoidal thread processing method of c/sic ceramic matrix composite material
  • A new type of trapezoidal thread processing method of c/sic ceramic matrix composite material

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Embodiment

[0047] The processing object is the Tr8×1.5-7e threaded connection of orthogonal three-directional C-fiber C / SiC ceramic matrix composite material, and the processing method is copying dry cutting.

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

[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 tool holder is made of nano-tungsten carbide-cobalt carbide, the blade is made of synthetic polycrystalline diamond (PCD), and the blade and the holder are made of high frequency induction brazing. The diameter is Φ9.75mm, the rotating diameter of the blade is Φ10mm, the number of blades is 2, and the corner R of the blade tip is 0.798mm. The diamond raw ...

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Abstract

The invention relates to a processing method of a novel trapezoidal thread of a C / SiC ceramic matrix composite material. (1) Design an integral variable diameter diamond round nose milling cutter and electroplated diamond thread milling cutter based on the profile of the trapezoidal thread; (2) Use the integral variable diameter diamond round nose milling cutter designed in step (1) to process the trapezoid The major diameter of the thread; (3) Using the electroplated diamond thread milling cutter designed in step (1), roughing the thread according to the thread-free enveloping process and the tool path design method of variable feed rate and variable depth of cut; (4) Using the electroplated diamond thread milling cutter designed in step (1), the thread is finished according to the non-instantaneous center enveloping machining process.

Description

technical field [0001] The invention relates to a structural design and processing method of a novel trapezoidal thread, in particular to the structural design and high precision, high precision, The invention relates to a low-damage processing technology, which 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 woven 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 technology has become the key to manufacturing high-reliability large-scale components one ...

Claims

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Application Information

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Patent Type & Authority Patents(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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