A method for manufacturing a metal silenced honeycomb structure

A technology of a honeycomb structure and a manufacturing method, which is applied to the manufacturing field of metal sound-absorbing honeycomb structures, can solve problems such as low processing efficiency, and achieve the effects of improving production efficiency and hole-making efficiency.

Inactive Publication Date: 2019-01-15
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology

[0008] Aiming at the problem of low processing efficiency of the current manufacturing method of single-beam laser drilling one by one after honeycomb brazing, the present invention proposes a method for manufacturing a metal sound-absorbing honeycomb structure, which uses a beam splitter to split a single-beam laser light source into multiple laser beams Beam flow, laser beam splitting and multi-beam synchronous drilling of metal sound-absorbing honeycomb panels, realizing simultaneous drilling of multiple metal sound-absorbing holes, avoiding hole blocking during metal sound-absorbing honeycomb brazing, and ensuring sound-absorbing performance. It solves the problem of low processing efficiency when the current single laser beam makes holes one by one, and improves the hole making efficiency of metal sound-absorbing honeycomb

Method used

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Embodiment 1

[0021] The manufacturing method of the titanium alloy sound-absorbing honeycomb structure: after the titanium alloy panel is cleaned and cleaned, the solder is arranged on the surface, and the titanium alloy honeycomb core is prepared by welding, and then the titanium alloy panel and the titanium alloy honeycomb core are brazed and assembled , into the vacuum furnace for vacuum brazing. After the brazing is qualified, the obtained titanium alloy sound-absorbing honeycomb structure is clamped and positioned on the multi-beam laser processing platform, and the multi-beam laser beams are used to make holes synchronously. The multi-beam laser beams used are double-beam laser beams, and the double-beam laser beams are generated by splitting a single laser light source, such as figure 1 As shown, the single laser beam emitted by the laser 1 is reflected by the shutter 2 to the beam expander 3, and after being split by the laser beam splitter 5 of the beam expander 4, it is divided in...

Embodiment 2

[0023] Manufacturing method of titanium alloy / stainless steel dissimilar material sound-absorbing honeycomb structure: After cleaning and cleaning the titanium alloy panel, arrange solder on its surface, clean the stainless steel honeycomb core, and then braze and assemble the titanium alloy panel and stainless steel honeycomb core , enter the vacuum furnace for vacuum brazing, vacuum brazing uses foil-like Ag-based solder with a thickness of 0.1-0.2mm, the brazing temperature is 810-835°C, and the holding time is 5-15min. After the brazing is qualified, the titanium alloy sound-absorbing honeycomb structure is clamped and positioned on the multi-beam laser processing platform, and the multi-beam laser beam is used to make holes. The multi-beam laser beam used is more than two laser beams. The multi-beam laser beam is generated by splitting a single laser light source. A single-stage or multi-stage beam splitter system is used to split a single laser beam into two n beam, wher...

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Abstract

The invention relates to a method for manufacturing a metal silenced honeycomb structure. The metal honeycomb structure obtained by brazing the panel and the honeycomb core body adopts the laser to drill the metal silencing hole, and adopts a single-stage or multi-stage beam splitter system to separate the single beam laser light source into a plurality of laser beam streams when the laser drillsthe hole, so as to simultaneously drill the metal silencing hole by the plurality of laser beam streams. On the basis of avoiding hole blocking in the brazing process of metal muffler honeycomb and ensuring the muffler performance, the method solves the problem of low machining efficiency when drilling holes one by one with single laser beam, and improves the drilling efficiency of metal muffler honeycomb.

Description

technical field [0001] The invention relates to a method for manufacturing a metal sound-absorbing honeycomb structure, which belongs to the technical field of aviation manufacturing. Background technique [0002] With the continuous development of the aviation industry, the increasingly serious aviation noise has attracted widespread attention. Aviation noise has become an important source of noise pollution. Aircraft noise will not only disturb the residents on the route, especially around the airport, but also arouse The vibration of the skin causes noise in the cabin and affects the comfort of passengers and crew. Noise index has become one of the main requirements for civil aircraft design, and the International Civil Aviation Organization and airworthiness agencies of various countries have successively promulgated aircraft noise airworthiness standards. In order to reduce the external radiation of engine noise, which is the main noise source of aircraft, the noise re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D29/00B64C1/40
CPCB64C1/40B64D29/00B64F5/10
Inventor 邓云华岳喜山陶军
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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