Disclosure of Invention
In view of the above, it is desirable to provide a detection device, a detection apparatus and a detection method, which can detect the air tightness of the internal structure of the product through a flow test.
The first aspect of the application provides a detection device for detect the gas tightness of a junction in a support inside, the junction is connected to for a connecting piece the inside tie point of support, a through-hole and an opening have been seted up to the support, the connecting piece is located the through-hole reaches between the opening, detection device includes:
the bearing part is used for bearing the bracket;
a first sealing portion for sealing the opening;
the second sealing part is used for sealing one end of the through hole so as to form an airflow space among the bracket, the bearing part, the connecting piece, the first sealing part and the second sealing part;
the flow measuring device is communicated with the gas flow space and is used for measuring the gas flow of the gas flow space by extracting gas in the gas flow space or charging gas into the gas flow space; and
and the controller is used for determining that the air tightness of the joint is qualified based on the fact that the measured gas flow of the gas flow space is smaller than a preset value.
Optionally, the detection device further includes a leakage detection device, which is connected to the other end of the through hole when one end of the through hole is in a sealed state, so as to detect the sealing property of the first sealing portion.
Optionally, wherein the flow measuring device comprises a differential pressure sensor, the flow measuring device measures the gas flow of the gas flow space through the differential pressure sensor.
Optionally, the detecting device further includes at least one positioning portion mounted on the carrying portion for fixing the bracket.
Optionally, the detection apparatus further comprises:
the first driving part is connected with the first sealing part and used for driving the first sealing part to move so as to seal the opening; and
and the second driving part is connected with the bearing part and used for driving the bearing part to move so that the bracket is close to the first sealing part and the second sealing part.
A second aspect of the present application provides a detection method for detecting air tightness of a joint inside a support, where the joint is a connection point where a connection member is connected to the inside of the support, the support is provided with a through hole and an opening, and the connection member is located between the through hole and the opening, including:
carrying the bracket by a carrying part;
sealing the opening by a first seal;
sealing one end of the through hole through a second sealing part so as to form an airflow space among the bracket, the bearing part, the connecting piece, the first sealing part and the second sealing part; and
communicating the gas flow space through a flow measuring device, and extracting gas in the gas flow space or charging gas into the gas flow space to measure the gas flow of the gas flow space; and
and determining that the air tightness of the joint is qualified based on the fact that the measured gas flow of the gas flow space is smaller than a preset value.
Optionally, the detection method further comprises: and when one end of the through hole is in a sealed state, the leakage detection device is connected with the other end of the through hole so as to detect the sealing property of the first sealing part.
Optionally, wherein the step of measuring the gas flow rate of the gas flow space comprises:
the gas flow of the gas flow space is measured by a differential pressure sensor.
A third aspect of the present application provides a detection apparatus comprising:
at least one of said detection devices;
the first conveyor belt is used for conveying the bracket with qualified air tightness detection at the joint;
the second conveying belt is used for conveying the bracket with the air tightness detected as unqualified at the joint;
the manipulator is used for moving out the bracket which is detected on the detection device; and
and the console is electrically connected with the controller and the manipulator respectively so as to control the manipulator to move the qualified support to the first conveying belt and move the unqualified support to the second conveying belt.
Optionally, the detection apparatus further comprises:
the feeding device is electrically connected with the control console and is used for supplying the undetected bracket; the manipulator is also used for placing the bracket on the feeding device on the detection device.
Optionally, the detection apparatus further comprises:
and the scanning device is electrically connected with the control console and is used for scanning the material codes on the bracket.
Optionally, the detection apparatus further comprises:
and the power control device is electrically connected with the detection device, the manipulator and the console respectively and is used for supplying power.
Optionally, the detection apparatus further comprises:
and the display device is electrically connected with the console and is used for displaying the detection result of the bracket.
The detection device, the detection equipment and the detection method detect the air tightness of the internal structure of the product through flow test, do not need to disassemble the structure during detection, are simple to operate and easy to realize, and effectively ensure the processing quality of electronic products.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Please refer to fig. 1, which illustrates a detecting apparatus 1 according to a preferred embodiment of the present application. The detecting device 1 is used for detecting the airtightness of a joint 20 inside a support 2 (as shown in fig. 3) of an electronic product. The joint 20 is a connection point where a connecting member 21 is connected to the inside of the bracket 2. The bracket 2 may also be replaced by other workpieces and components with similar structures in the electronic product, including a frame body, a middle frame assembly, a housing, and the like on the electronic product, which is not limited herein.
In one embodiment, the connecting member 21 is a tin mesh gauze, and the connecting portion 20 is a dispensing position where the tin mesh gauze is adhered to the bracket 2. The detection device 1 detects the airtightness of the joint 20, namely, detects the dispensing, covering and bonding condition of the joint 20.
Referring to fig. 2 and fig. 3, the bracket 2 is formed with a through hole 22 and an opening 23. The connecting member 21 is located between the through hole 22 and the opening 23.
The detection device 1 includes a support portion 10, a first seal portion 11, a second seal portion 12, a flow rate measurement device 13, and a controller 14.
In one embodiment, the carrier 10 is used to carry the rack 2. The first seal portion 11 is for sealing the opening 23. The second sealing portion 12 is used for sealing one end of the through hole 22, so that an airflow space 15 is formed among the bracket 2, the bearing portion 10, the connecting member 21, the first sealing portion 11 and the second sealing portion 12.
Referring to fig. 4, in one embodiment, the flow measuring device 13 is connected to the gas flow space 15 for measuring the flow of gas extracted or filled into the gas flow space 15 by extracting the gas in the gas flow space 15 or filling the gas into the gas flow space 15. For the sake of understanding, in the present embodiment and the accompanying drawings, the manner of extracting the gas in the gas flow space 15 is mainly described, and the flow rate measuring device 13 is used for measuring the flow rate of the extracted gas.
Referring to fig. 5, in one embodiment, the flow measuring device 13 includes a laminar flow tube 130, a differential pressure sensor 131, an electronic valve 132, a corrector 133 and a driver 134. One end of the laminar flow tube 130 communicates with the gas flow space 15, and the other end is connected to the flow rate measuring device 13. The laminar flow tube 130 is used to pass gas that is drawn into the gas flow space 15 or gas that is charged into the gas flow space 15. The differential pressure sensor 131 is connected to both ends of the laminar flow tube 130 for measuring the gas flow in the laminar flow tube 130. The electronic valves 132 are connected to both ends of the differential pressure sensor 131, and are configured to allow gas to flow to the differential pressure sensor 131 when opened and prevent gas from flowing to the differential pressure sensor 131 when closed. The corrector 133 is connected between the laminar flow tube 130 and the driver 134, and is used for adjusting the gas flow rate in the laminar flow tube 130 and the gas flow space 15. The driver 134 is used to draw the gas in the gas flow space 15 by the negative pressure or to fill the gas in the gas flow space 15 with the gas.
In one embodiment, the flow measuring device 13 detects a pressure difference across the laminar flow tube 130 by the differential pressure sensor 131 to measure the flow of gas drawn from the gas flow space 15. The differential pressure sensor 131 can measure the differential pressure Δ P across the laminar flow tube 130, and the flow Q of the airflow space 15 is pi R4Δ P/8 μ L, where Δ P is a pressure differential, R is an inner radius of the laminar flow tube 130, μ is a gas density, and L is a length of the laminar flow tube 130. In one embodiment, the gas is air. In other embodiments, a gas is introduced into the gas flow space 15, and the gas is not limited to air.
In one embodiment, the controller 14 is configured to determine whether the measured flow of gas is less than a predetermined value, determine that the hermeticity of the junction 20 is acceptable based on the measured flow of gas extracted from the gas flow space 15 being less than the predetermined value, and determine that the hermeticity of the junction 20 is unacceptable based on the measured flow of gas extracted from the gas flow space 15 being greater than or equal to the predetermined value. The controller 14 is electrically connected to the flow measuring device 13, and can also be used to control the flow measuring device 13 to pump air or charge air from the airflow space 15, and to measure the airflow.
As shown in fig. 4, in one embodiment, the connection member 21 is a mesh structure, but is not limited thereto, and an air flow may pass through the connection member 21. If the dispensing coverage of the joint 20 is normal, the air flow channel indicated by the arrow b in the figure is closed, only the air flow of the air flow channel indicated by the arrow a in the figure passes through the connecting piece 21 and enters the flow measuring device 13, at this time, the air flow of the air flow space 15 measured by the flow measuring device 13 is smaller than the preset value, and the air tightness of the joint 20 is qualified. If the dispensing coverage of the joint 20 is abnormal, the air flow channel indicated by the arrow b in the figure is not closed, and air flows in the air flow channels indicated by the arrows a and b in the figure pass through the connecting piece 21 and enter the flow measuring device 13, at this time, the air flow of the air flow space 15 measured by the flow measuring device 13 is greater than or equal to a preset value, and the air tightness of the joint 20 is not qualified.
Referring to fig. 6, in one embodiment, the detecting device 1 further includes a leakage detecting device 16 connected to one end of the through hole 22 in a sealing state to detect the sealing performance of the first sealing portion 11.
In one embodiment, when the sealing property of the first sealing portion 11 needs to be tested, the leak testing device 16 is mounted on the testing device 1. In one embodiment, an adhesive tape may be used to snugly seal the upper end of the through-hole 22. The other end of the through hole 22, i.e. the back of the tin-hole gauze, is connected to the leak detection device 16. The first seal portion 11 seals the opening 23. The leak detection device 16 detects whether or not there is a gas leak at the other end of the through hole 22, determines that the sealing property of the first seal portion 11 is acceptable based on the absence of the gas leak at the other end of the through hole 22, and determines that the sealing property of the first seal portion 11 is unacceptable based on the presence of the gas leak at the other end of the through hole 22.
As shown in fig. 1, the detecting device 1 further includes at least one positioning portion 17 mounted on the supporting portion 10 for fixing the bracket 2.
In one embodiment, the positioning portion 17 includes at least one suction nozzle 170 and at least one positioning post 171. The suction nozzle 170 is disposed on the surface of the supporting portion 10, and the positioning column 171 is disposed on the edge of the supporting portion 10. Alternatively, the number of the suction nozzles 170 is six, and all the suction nozzles are arranged on the surface of the bearing part 10. The number of the positioning posts 171 is four, two of the positioning posts 171 are disposed on the lateral edge of the supporting portion 10, and the other two positioning posts 171 are disposed on the longitudinal edge of the supporting portion 10.
The detection device 1 further includes a first driving unit 18 and a second driving unit 19. In one embodiment, the first driving portion 18 is connected to the first sealing portion 11 for driving the first sealing portion 11 to move to seal the opening 23. The second driving portion 19 is connected to the bearing portion 10 for driving the bearing portion 10 to move, so that the bearing bracket 2 is close to the first sealing portion 11 and the second sealing portion 12.
Fig. 7 is a flowchart illustrating a detection method according to an embodiment of the present application. The order of the steps in the flow chart may be changed and some steps may be omitted according to different needs.
The detection method is used for detecting the air tightness of a joint 20 in the support 2, and the joint 20 is a connecting point of a connecting piece 21 connected to the interior of the support 2.
In step 701, the carrier 2 is carried by the carrier 10.
In one embodiment, the rack 2 is placed on the carrier part 10 such that the carrier part 10 carries the rack 2.
In step 702, the opening 23 is sealed by the first sealing portion 11.
In one embodiment, the second driving portion 19 drives the carrying portion 10 to move, so that the carried bracket 2 is close to the first sealing portion 11, and the opening 23 faces the first sealing portion 11. The first sealing part 11 is then driven by the first driving part 18 to move downward until the opening 23 is sealed.
In step 703, one end of the through hole 22 is sealed by the second sealing portion 12, so that an airflow space 15 is formed between the bracket 2, the bearing portion 10, the connecting member 21, the first sealing portion 11 and the second sealing portion 12.
In one embodiment, the second sealing portion 12 seals one end of the through hole 22 while the first driving portion 18 seals the opening 23.
In step 704, the gas flow space 15 is communicated through the flow measuring device 13, and the gas in the gas flow space 15 or the charged gas is extracted to the gas flow space 15, so as to measure the gas flow rate of the gas flow space 15.
In one embodiment, the airflow space 15 is communicated through the laminar flow tube 130, and then the pressure difference between both ends of the laminar flow tube 130 is detected by the differential pressure sensor 131 to measure the flow rate of the gas drawn or filled into the airflow space 15.
In one embodiment, the differential pressure sensor 131 can measure the differential pressure Δ P across the laminar flow tube 130, such that the flow rate Q of the airflow space 15 is pi R4Δ P/8 μ L, where Δ P is a pressure differential, R is an inner radius of the laminar flow tube 130, μ is a gas density, and L is a length of the laminar flow tube 130. In one embodiment, the gas is air.
Step 705, determining whether the measured gas flow rate of the gas flow space 15 is less than a predetermined value. When the measured gas flow rate of the gas flow space 15 is less than the preset value, the process proceeds to step 606. When the measured gas flow rate of the gas flow space 15 is greater than or equal to the preset value, the flow proceeds to step 607.
Step 706, based on the measured gas flow rate of the gas flow space 15 being less than the preset value, it is determined that the gas tightness of the joint 20 is acceptable.
Step 707, determining that the air tightness of the joint 20 is not qualified based on the measured gas flow rate of the gas flow space 15 being greater than or equal to the preset value.
In one embodiment, the detection method further comprises: the leak detection device 16 is connected to the other end of the through hole 22 when one end of the through hole 22 is in a sealed state to detect the sealing performance of the first seal portion 11.
In one embodiment, the leak detection device 16 is installed in the detection device 1 when it is necessary to detect the sealing performance of the first sealing portion 11. In one embodiment, an adhesive tape may be used to snugly seal the upper end of the through-hole 22. The other end of the through hole 22, i.e. the back of the tin-hole gauze, is connected to the leak detection device 16. The first seal portion 11 seals the opening 23. The leak detection device 16 detects whether or not there is a gas leak at the other end of the through hole 22, determines that the sealing performance of the first seal portion 11 is acceptable based on the absence of the gas leak at the other end of the through hole 22, and determines that the sealing performance of the first seal portion 11 is unacceptable based on the presence of the gas leak at the other end of the through hole 22.
Fig. 8 is a schematic structural diagram of a detection apparatus according to an embodiment of the present application.
The inspection apparatus 3 includes, but is not limited to, at least one inspection device 1, a first conveyor 31, a second conveyor 32, a robot 33, and a console 34.
In one embodiment, the first conveyor belt 31 is used to convey the stent 2 whose joint 20 is tested to be acceptable for airtightness. The second conveyor belt 32 is used to convey the rack 2 whose airtightness at the joint 20 is detected as defective.
In one embodiment, the robot 33 is used to remove the rack 2 that has completed testing on the testing device 1.
In one embodiment, the console 34 is electrically connected to the controller 14 and the robot 33, respectively, to control the robot 33 to move the qualified rack 2 to the first conveyor 31 and the unqualified rack 2 to the second conveyor 32.
In an embodiment, the detection apparatus 3 further comprises a feeding device 35. The feeding device 35 is electrically connected to the console 34 for supplying the rack 2 not to be tested. The manipulator 33 is further configured to place the rack 2 on the loading device 35 on the detecting device 1.
In an embodiment, the detection device 3 further comprises scanning means 36. The scanning device 36 is electrically connected to the console 34 for scanning the material code on the rack 2.
In an embodiment, the detection device 3 further comprises a display means 38. The display device 38 is electrically connected to the console 34 for displaying the detection result of the stand 2.
In one embodiment, the detection device 3 further comprises a power control means 37 electrically connected to the detection means 1, the manipulator 33 and the console 34, respectively, for supplying power. In some embodiments, the power control device 37 may also be electrically connected to other devices such as the feeding device 35, the scanning device 36, the display device 38, and the like to supply power, which is not limited herein.
The detection device, the detection equipment and the detection method provided by the application detect the air tightness of the internal structure of the product through flow testing, do not need to disassemble the structure during detection, are simple to operate and easy to realize, and effectively ensure the processing quality of electronic products.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units or means recited in the apparatus claims may also be embodied by one and the same item or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present application.