CN104390747A - Connector welding seal detection method - Google Patents

Abstract

The invention relates to a connector welding seal detection method. According to the technical scheme, a detection platform with a standard joint is designed and is connected with a test port of a helium mass spectrometer leak detector through the standard joint. A half-sealed box with a connector welded is put in a detection area of the detection platform inversely, the helium mass spectrometer leak detector works, the interior of the half-sealed box forms a vacuum state, helium is injected to the connector welding position, the helium mass spectrometer leak detector can measure the leakage rate of the welding position if leakage gaps exist in the welding position, and the helium mass spectrometer leak detector releases gas automatically if no leakage rate is detected, and test of a next workpiece is performed. By the aid of the method, the connector welding seal is detected, and the detection efficiency is improved.

Description

A kind of detection method of connector welding sealing

Technical field

The present invention relates to a kind of detection method for connector welding sealing.

Background technology

Domestic leakage test electron trade carry out wider, as the vacuum components and parts such as various semiconductor devices, integrated circuit, relay all carry out leakage test, all quite ripe to the Rough Inspection of detected pieces soldering and sealing sealing, examining technology, detection method at present for connector welding sealing is put on checkout equipment by examined workpiece, checkout equipment applies quantitative pressure to detected pieces, connector welding sealing quality is judged by the change of force value, for the method, concrete leak rate value cannot be measured, detection efficiency is low.

Summary of the invention

The object of the invention is to invent a kind of special method for connector welding sealing propertytest, the detection of the plug-in unit welded seal that achieves a butt joint.

The technical solution that the present invention adopts for its technical matters of solution is: design is a kind of, and with modular connection, (this joint must design according to helium mass spectrometer leak detector test port physical size, test port is divided into metric system, made in Great Britain) detection platform, this platform is connected with helium mass spectrometer leak detector test port by modular connection, lock with special fastening, between interconnective joint with special standard seal circle to ensure impermeability, the semiclosed box body being welded with connector is inverted and is placed on detection platform surveyed area, helium mass spectrometer leak detector works, semiclosed tray interior is in vacuum state, now helium is sprayed to connector weld, if weld has leak, then helium mass spectrometer leak detector can measure the leak rate of weld, if do not detect leak rate, then helium mass analyzer automatic deflation, carry out next part test.This method of testing needs to carry out at special surveyed area, ensures the ventilation that this surveyed area is good, if test zone draws badly, the helium background in environment increases, and affects the accuracy of detection of leak locator.

Distinguishing feature of the present invention is: a detection platform meeting connector welding sealing on different size box body, be made up of surveyed area, standard interface and detection reserved area, wherein surveyed area and detection reserved area are with O-ring seal, and standard interface, with standard seal circle, is characterized in that:

1) at detected pieces, detection platform and helium mass spectrometer leak detector, three is connected and inner forms an airtight cavity;

2) surveyed area is a groove according to tested semiclosed box shape size design, to prevent the tested box body generation harmful drift placed; Surveyed area is each other in step-like design;

3) detect reserved area to design according to the demand of connector welding sealing propertytest on different size box body, as required, whole detection platform can design multiple detection reserved area;

4) detection platform is an one-piece construction, does not adopt welding, general mechanical connection: screw connects, riveted joint, and this structural design makes test process sealing wait until higher guarantee, improves accuracy of detection;

5) this kind of connector welding method for conducting leak test efficiency is high, and detection platform cost of manufacture is low, can meet batch detection.

Accompanying drawing explanation

Fig. 1 detects schematic diagram.

Fig. 2 test chamber is normally connected cross section view with detected pieces, is 1. examined workpiece, 2. for detecting reserved area, is 3. detection platform.

Embodiment

Principle of the present invention realizes block diagram as shown in Figure 1.Concrete implementation step is as follows.

1, the modular connection of connector welding sealing propertytest platform is connected with helium mass analyzer test port, and with special fastening locking, has special standard seal circle between interconnective joint to ensure impermeability; Being inverted by the semiclosed box body being welded with connector is placed on the O-ring seal in detection platform particular detection region, as Fig. 1, because detected pieces is placed on the detection groove inner seal ring of particular design, and detect groove and can prevent detected pieces generation harmful drift, thus ensure impermeability further; Helium mass spectrometer leak detector, to communicate between detection platform and tested box body, three forms an internal cavity, as shown in Figure 2, during leak locator work, need through slightly taking out, Rough Inspection, examining three processes, slightly taking out the stage, the vacuum pump of leak locator just vacuumizes this inner chamber that three is formed, and detected pieces inner chamber is in meet " vacuum state " of leak locator leak detection.

2, getting out special helium spray gun in advance, and regulate helium top hole pressure, controlling helium gas flow by regulating helium top hole pressure; Open helium mass spectrometer leak detector, according to the bubble-tight leakage detecting process requirement of connector welding, in helium mass spectrometer leak detector, arrange the leak detection parameters such as leak rate, time for roughing, Rough Inspection time, examining time, these parameters can be calculated by " technological requirement of leak detection " and obtain; After being ready to complete, press leak locator " TEST " key, now above, the processes such as helium mass spectrometer leak detector execution is slightly taken out, Rough Inspection, examining, in these processes, tested tray interior is in vacuum state, meanwhile, with ready helium rifle, helium is sprayed to tested connector welding place; Now, if there is leak at connector welding place, helium then can be inhaled into the helium mass spectrum chamber of leak locator by this leak, and then records the amount of helium by this leak, and the display frequently of simultaneously helium mass spectrometer leak detector demonstrates leak rate value corresponding to this leak; If tested box body connector welding place does not leak, then leak locator automatic deflation, now, takes off detected pieces, proceeds test leakage examination below.

3, experimentally, and actual service condition at ordinary times, draw: single test block completes whole leak detection process, within 20 seconds used times; The method achieves connector welding sealing propertytest; The efficiency that the structural design of this detection platform makes connector welding sealing hunt leak well is improved, and efficiency of leaking hunting improves, and the internal cavity mainly brought by test platform is very little, and the pumpdown time of such leak locator will shorten greatly.

Claims (3)

1. the detection method of a connector welding sealing, it is characterized in that: design a kind of detection platform with modular connection, this platform is connected with helium mass spectrometer leak detector test port by modular connection, is inverted by the semiclosed box body being welded with connector and is placed on detection platform surveyed area; Helium mass spectrometer leak detector works, and semiclosed tray interior forms vacuum state, now sprays helium to connector weld, if weld has leak, then helium mass spectrometer leak detector then can measure the leak rate of weld, if do not detect leak rate, then helium mass analyzer then automatic deflation, carries out next part test.

2. the detection method of a kind of connector welding sealing according to claim 1, is characterized in that: described modular connection and helium mass analyzer test port special fastening are locked, between interconnective joint with special standard seal circle to ensure impermeability.

3. one meets the detection platform of connector welding sealing on different size box body, be made up of surveyed area, standard interface and detection reserved area, wherein surveyed area and detection reserved area are with O-ring seal, and standard interface, with standard seal circle, is characterized in that:

1) at detected pieces, detection platform and helium mass spectrometer leak detector, three is connected and inner forms an airtight cavity;

2) surveyed area is a groove according to tested semiclosed box shape size design, to prevent the tested box body generation harmful drift placed; Surveyed area is each other in step-like design;

3) detect reserved area to design according to the demand of connector welding sealing propertytest on different size box body, as required, whole detection platform can design multiple detection reserved area;

4) detection platform is an one-piece construction, does not adopt welding, general mechanical connection: screw connects, riveted joint.