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A laser shock life extension method for tungsten electrodes of short-arc lamps

A laser shock and tungsten electrode technology, which is applied in the manufacture of thermionic cathodes, etc., can solve the problems of short arc lamp filaments with low lifespan, low use efficiency, and high cost of use, to prevent the initiation of micro-cracks, improve service life, and improve stability. Effect

Active Publication Date: 2017-04-12
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultra-high voltage short-arc lamps are currently mostly used in the entertainment / movie industry and IC equipment industry. However, due to ultra-high pressure and high heat, the filament life of short-arc lamps is generally low, and they often need to be replaced frequently in actual use, resulting in low efficiency. Higher cost of use
The current life extension of tungsten electrodes mostly uses hydraulic extrusion method, although it can better improve the life of tungsten, but the relative cost is relatively high

Method used

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  • A laser shock life extension method for tungsten electrodes of short-arc lamps
  • A laser shock life extension method for tungsten electrodes of short-arc lamps
  • A laser shock life extension method for tungsten electrodes of short-arc lamps

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Specimen material: 5000R tungsten electrode of short-arc mercury-xenon lamp from Shenzhen Kaishi Optoelectronics Technology Co., Ltd.;

[0035] Put the tungsten electrode into an ultrasonic cleaning machine equipped with deionized water at a temperature of 23°C, and the ultrasonic frequency is 40kHz, and clean for 9 minutes;

[0036] Blow dry with 0.6MPa dry nitrogen, and then put it in a drying oven at 100°C for 10 minutes;

[0037] In the 10,000-class clean room, the working end face (front end) of the tungsten electrode is covered with a layer of black tape with a thickness of 120 μm for the absorption layer;

[0038] Install the tungsten electrode covered with the absorbing layer on the workbench, with the front end of the tungsten electrode facing the laser beam, and apply a constrained layer with a thickness of 2mm on the absorbing layer, and select deionized water for the constrained layer;

[0039] The laser beam with a pulse width of 12ns, a wavelength of 1064...

Embodiment 2

[0043] Specimen material: 5000R tungsten electrode of short-arc mercury-xenon lamp from Shenzhen Kaishi Optoelectronics Technology Co., Ltd.;

[0044] Put the tungsten electrode into an ultrasonic cleaning machine equipped with deionized water at a temperature of 23°C, and the ultrasonic frequency is 40kHz, and clean for 9 minutes;

[0045] Blow dry with 0.6MPa dry nitrogen, and then put it in a drying oven at 100°C for 10 minutes;

[0046] In the 10,000-class clean room, the working end face (front end) of the tungsten electrode is covered with an absorbing aluminum foil with a thickness of 120 μm;

[0047] Install the tungsten electrode covered with the absorbing layer on the workbench, with the front end of the tungsten electrode facing the laser beam, and apply a constrained layer with a thickness of 2.5 mm on the absorbing layer, and select deionized water for the constrained layer;

[0048] The laser beam with a pulse width of 17ns, a wavelength of 1064nm, a laser energ...

Embodiment 3

[0052] Specimen material: 5000R tungsten electrode of short-arc mercury-xenon lamp from Shenzhen Kaishi Optoelectronics Technology Co., Ltd.;

[0053] Put the tungsten electrode into an ultrasonic cleaning machine equipped with deionized water at a temperature of 23°C, and the ultrasonic frequency is 40kHz, and clean for 9 minutes;

[0054] Blow dry with 0.6MPa dry nitrogen, and then put it in a drying oven at 100°C for 10 minutes;

[0055] In a class 10,000 clean room, the working end face (front end) of the tungsten electrode is covered with a layer of black paint with a thickness of 120 μm for the absorption layer;

[0056] Install the tungsten electrode covered with the absorbing layer on the workbench, with the front end of the tungsten electrode facing the laser beam, and apply a constrained layer with a thickness of 3 mm on the absorbing layer. The constrained layer is made of K47 light-transmitting glass;

[0057] The laser beam with a pulse width of 20 ns, a waveleng...

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Abstract

The invention discloses a laser shock life-prolonging method of the tungsten electrode of a short-arc lamp. The method comprises: cleaning a workpiece with deionized water, blow-drying the workpiece with nitrogen, and placing the dried workpiece in a drying box at the temperature of 100 degrees centigrade to dry the workpiece for 10 minutes; covering the operating end face of the tungsten electrode with an absorption layer to adsorb laser energy in order to prevent the laser from damaging the surface of the tungsten electrode; installing the tungsten electrode on a workbench and applying a constraint layer to the absorption layer in order to constrain an increase in the shrck force of a laser shock wave; performing pre-impact life-prolonging treatment and impact life-prolonging treatment by using a laser beam with a pulse width of 3 to 40ns, a wavelength of 532 or 1064nm, laser energy of 0.5 to 20J, repetition frequency of 0.1 to 10Hz, a laser beam diameter of 0.5 1o 10mm; removing the absorption layer coating the operating end face of the tungsten electrode; cleaning the workpiece with deionized water and blow-drying the workpiece with dry nitrogen in order to assemble the short-arc lamp. The laser shock life-prolonging method is simple in technology, obvious in life-prolonging effect, high in efficiency, low in cost, and little in pollution.

Description

technical field [0001] The invention relates to the fields of ultra-high pressure capillary mercury lamps used in industry, spherical short-arc mercury-xenon lamps and spherical short-arc xenon lamps used in entertainment / movie industries, etc., and specifically relates to a method for prolonging the life of a short-arc lamp by laser shocking a tungsten electrode. Background technique [0002] Metal tungsten has the characteristics of high melting point, high strength, high modulus, high hardness, wear resistance, corrosion resistance, etc., and is currently mostly used to make filaments, electrical contacts, thermocouples, etc. It is especially widely used in ultra-high pressure short-arc lamps. Ultra-high voltage short-arc lamps are currently mostly used in the entertainment / movie industry and IC equipment industry. However, due to ultra-high pressure and high heat, the filament life of short-arc lamps is generally low, and they often need to be replaced frequently in actu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/04
Inventor 乔红超赵吉宾陆莹
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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