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Controlling and monitoring method for gases in vacuum cabin

A vacuum chamber and vacuum chamber technology, applied in the field of vacuum chamber gas control and monitoring, can solve the problems of low production efficiency, long vacuuming time, large volume, etc., and achieve the effect of improving production efficiency and preventing insecurity

Inactive Publication Date: 2015-11-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing vacuum welding chamber has large volume, long vacuuming time, and low production efficiency, while the smoke and heat generated during the welding process of the small vacuum welding chamber affect the transmission of the laser light, easily causing the processing window to burst due to heat, There are potential safety hazards, and a vacuum chamber gas control and monitoring method is provided

Method used

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  • Controlling and monitoring method for gases in vacuum cabin
  • Controlling and monitoring method for gases in vacuum cabin

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specific Embodiment approach 1

[0017] Specific implementation mode one: the following combination figure 1 and figure 2 Describe this embodiment, the vacuum chamber gas control and monitoring method described in this embodiment, the specific process of the gas control and monitoring method is:

[0018] Step 1. Turn on the vacuum pump V 1 , pump out the gas in the vacuum chamber A and the vacuum chamber B;

[0019] Step 2. Turn on the sampling pump V 2 , to calibrate the water and oxygen components of argon;

[0020] Step 3. Determine whether the argon water and oxygen composition to be charged has reached the set value, if yes, execute step 4, otherwise return to step 2; the set value of the argon water and oxygen composition is: volume fraction Ar≥ 99.999×10 -2 , O 2 ≤2ppm,H 2 O≤4ppm;

[0021] Step 4, filling argon into the vacuum chamber A and the vacuum chamber B at the same time;

[0022] Step 5. Determine whether the water and oxygen composition of the gas in the vacuum chamber A reaches the ...

specific Embodiment approach 2

[0027] Specific implementation mode two, the following combination figure 1 Describe this embodiment, this embodiment will further explain Embodiment 1, the specific process of extracting the gas in the vacuum chamber A and vacuum chamber B described in step 1 is:

[0028] Step 1-1, open the solenoid valve J 1 , through the filter f 1 Evacuate the gas in the vacuum chamber A;

[0029] Step 1-2, using pressure sensor Y1 1 / Y1 2 Detect the gas in the vacuum chamber A, and judge whether the vacuum degree of the gas in the vacuum chamber A reaches the working vacuum degree, if yes, perform steps 1-3, if not, repeat steps 1-2;

[0030] Step 1-3, close the solenoid valve J 1 , open the solenoid valve J 2 , through the filter f 1 Evacuate the gas in the vacuum chamber B;

[0031] Step 1-4, using pressure sensor Y2 1 / Y2 2 Detect the gas in the vacuum chamber B, and judge whether the vacuum degree of the gas in the vacuum chamber B reaches the working vacuum degree, if so, p...

specific Embodiment approach 3

[0033] Specific implementation mode three, the following combination figure 1 Describe this embodiment, this embodiment will further explain Embodiment 2, the specific process of calibrating the water and oxygen components of argon described in step 2 is:

[0034] Step 2-1, open the solenoid valve J 11 , argon through the pressure gauge Z 1 and solenoid valve J 11 Charge flow regulating valve T 1 ;

[0035] Step 2-2, open the solenoid valve J 12 , the calibration gas passes through the solenoid valve J 12 Charge flow regulating valve T 1 ;

[0036] Step 2-3, through the flow regulating valve T 1 The argon and calibration gas pass through the filter f 4 Filling the Water Content Analyzer I 1 ;

[0037] Step 2-4, through water content analyzer I 1 The argon and calibration gas pass through the flow regulating valve T 2 Charge Oxygen Analyzer I 2 ;

[0038] Step 2-5, through the oxygen content analyzer I 2 The argon and calibration gas pass through the sampling pu...

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Abstract

The invention provides a controlling and monitoring method for gases in a vacuum cabin, with the object of solving problems in the prior art. For instance, a conventional vacuum welding chamber takes up large space, takes a long time to vacuum and is low in production capacity. A small sized vacuum welding chamber, however, is faced with potential hazards caused by smoke and heat during a welding process because the smoke and heat influence the penetration of laser and make a processing window break easily. The controlling and monitoring method comprises the steps of firstly starting a vacuum pump to extract out gases in the vacuum cabins and starting a sampling pump to calibrate water and oxygen contents in argon; judging whether the water and oxygen contents reach the pre-set value or not; if so, filling the two vacuum cabins with argon at the same time; judging whether water and oxygen contents in the gases of the vacuum cabins reach the pre-set value or not; if so, welding inside the vacuum cabins and discharging smoke and heat produced in the welding process and at the same time, judging whether the water and oxygen contents in the gases of the vacuum cabins reach the pre-set value or not; discharging gases in the vacuum cabins when the welding is completed. The controlling and monitoring method is suitable for laser welding.

Description

technical field [0001] The invention relates to a method for gas control and monitoring in a vacuum chamber. Background technique [0002] With the rapid progress of modern industrial technology, the design and manufacture of many new components put forward higher requirements for welding precision and welding quality, and some of them need to be welded under vacuum to ensure the quality of the weld. Vacuum laser welding is usually used to process some precision parts. During the welding process of the positioning grid in the nuclear reactor fuel assembly, the material of the positioning grid is zirconium alloy, which is composed of a group of honeycomb cells. The traditional vacuum chamber has a large volume, low effective utilization rate of the vacuum chamber, long vacuuming time, and the vacuum degree cannot be guaranteed, which greatly reduces the production efficiency; while using a small vacuum chamber, a large amount of smoke and heat will be generated during the we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D11/13G01L21/00
Inventor 陶汪闫相和陈彦宾李纵跃林泳乔亮苏轩
Owner HARBIN INST OF TECH