CN105738046A - Body-in-white air-tightness detection system and detection method - Google Patents
Body-in-white air-tightness detection system and detection method Download PDFInfo
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- CN105738046A CN105738046A CN201410766892.6A CN201410766892A CN105738046A CN 105738046 A CN105738046 A CN 105738046A CN 201410766892 A CN201410766892 A CN 201410766892A CN 105738046 A CN105738046 A CN 105738046A
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Abstract
The invention discloses a body-in-white air-tightness detection system and a detection method. The system comprises at least eight organic glass plates, a pressure sensor, a fog generator, a blower fan and an air input sensor, wherein the organic glass plates are in sealing connection with each glass window on the body-in-white to form a sealed body chamber, the fog generator and the blower fan are respectively in sealing communication with the body chamber, the pressure sensor is arranged in the body chamber, and the air input sensor is arranged between the blower fan and the body chamber. The system has a simple structure, realizes low cost and guarantees that the experiment result is accurate, air-tightness detection and leakage positioning can be effectively realized through repeated body-in-white air-tightness detection in short time, and body-in-white air-tightness can be guaranteed.
Description
Technical field
The present invention relates to detection system, particularly relate to body in white air tightness detection system.
The invention still further relates to and utilize above-mentioned air tightness detection system to the bubble-tight detection method of body in white.
Background technology
At present, not having experimental technique and the experimental facilities that body in white air-leakage test tests, therefore can not carry out body in white hermeticity experiment on market and in actual auto manufacturing, the problem so caused mainly has: cannot evaluate the sealing effectiveness of body in white；The sealing effectiveness of the parts overlapping regions such as gluing, weld seam, partition block cannot be evaluated；The leak area of body in white cannot be confirmed；Leakage rate cannot be recorded, therefore cannot be carried out further relative analysis and technological improvement.
Summary of the invention
The present invention completes to solve deficiency of the prior art, it is an object of the invention to provide simple in construction, cost is low, can ensure that experimental result accurately, can recycle and carry out body in white air-leakage test, at short notice effectively detection air-tightness locating leaks part, it is ensured that the bubble-tight body in white air tightness detection system of body in white.
nullThe body in white air tightness detection system of the present invention and detection method，Including at least eight pieces of poly (methyl methacrylate) plates、Pressure transducer、Aerosol generator、Blower fan and air inflow sensor，The shape of described poly (methyl methacrylate) plate and size respectively with windowpane on Qianmen, the body in white left and right sides、Windowpane on back door, the left and right sides、Left and right sides butterfly windowpane、Front windshield glass window is consistent with rear tailgate windowpane shape and size，Described poly (methyl methacrylate) plate respectively with windowpane on Qianmen, the body in white left and right sides、Windowpane on back door, the left and right sides、Left and right sides butterfly windowpane、Front windshield glass window and rear tailgate windowpane are tightly connected and form the vehicle body cavity sealed，Described aerosol generator seals with described vehicle body cavity respectively with described blower fan and connects，Described pressure transducer is positioned at described vehicle body cavity，It is provided with and communicated with air inflow sensor between described blower fan and described car operatic tunes body.
The body in white air tightness detection system of the present invention it may also is that
Described aerosol generator connects with the sealing of described vehicle body cavity each through ventilation duct with described blower fan.
One end of described ventilation duct is connected with aerosol generator and blower fan respectively, and the other end of described ventilation duct is tightly connected with the perforate on described poly (methyl methacrylate) plate respectively.
Poly (methyl methacrylate) plate is tightly connected by sealant tape with windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on Qianmen, the body in white left and right sides respectively, and described aerosol generator is all connected by sealant tape sealing with described vehicle body cavity with described blower fan.
nullThe body in white air tightness detection system of the present invention，Including at least eight pieces of poly (methyl methacrylate) plates、Pressure transducer、Aerosol generator、Blower fan and air inflow sensor，The shape of described poly (methyl methacrylate) plate and size respectively with windowpane on Qianmen, the body in white left and right sides、Windowpane on back door, the left and right sides、Left and right sides butterfly windowpane、Front windshield glass window is consistent with rear tailgate windowpane shape and size，Described poly (methyl methacrylate) plate respectively with windowpane on Qianmen, the body in white left and right sides、Windowpane on back door, the left and right sides、Left and right sides butterfly windowpane、Front windshield glass window and rear tailgate windowpane are tightly connected and form the vehicle body cavity sealed，Described aerosol generator seals with described vehicle body cavity respectively with described blower fan and connects，Described pressure transducer is positioned at described vehicle body cavity，It is provided with and communicated with air inflow sensor between described blower fan and described car operatic tunes body.So when detecting, poly (methyl methacrylate) plate is all used to be closed window all of on body in white, the Kong Jun that body in white communicates with the external world is being sealed, overall body in white is made to be internally formed the vehicle body cavity of sealing, start aerosol generator and blower fan, the numerical value of record pressure transducer and air inflow sensor, the pressure difference value between force value and initial pressure value in the vehicle body cavity of contrast air inflow and body in white, determine body in white air-tightness, if there being leakage part, spilling part by smog and determining leakage point.Relative to the advantage of prior art be simple in construction, cost low, can experimental result accurately, poly (methyl methacrylate) plate can recycle and carry out body in white air-leakage test, at short notice effectively detection air-tightness locating leaks part, it is ensured that body in white air-tightness.
It is a further object of the present invention to provide and utilize that said structure is simple, cost is low, experimental result is accurate, can recycle and carry out body in white air-leakage test, at short notice effectively detection air-tightness locating leaks part, it is ensured that body in white is carried out the detection method of air-leakage test by the bubble-tight body in white air tightness detection system of body in white.
The present invention utilizes the body in white air tightness detection system method to body in white air-leakage test, comprises the following steps:
A. prepare the body in white of application to be detected, and make and windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane shape and eight pieces of poly (methyl methacrylate) plates of the same size on windowpane, back door, the left and right sides on Qianmen, the described body in white left and right sides；
B. pressure transducer is positioned in body in white and is transmitted data wire and export to body in white, poly (methyl methacrylate) plate is tightly connected with windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on Qianmen, the described body in white left and right sides respectively, all the other holes identical with vehicle body all seal, and form the vehicle body cavity sealed；
C. blower fan and aerosol generator are sealed respectively and be communicated to described vehicle body cavity, seal between blower fan and described vehicle body cavity and be communicated with air inflow sensor；
D. start blower fan and/or aerosol generator passes into smog and/or gas in described vehicle body cavity, air inflow sensor measures the air inflow passing into vehicle body cavity, pressure in pressure transducer sensing vehicle body cavity, if the pressure differential of the force value in vehicle body cavity and initial pressure value matches with the air inflow passed into, then vehicle body air-tightness is good, if the force value in vehicle body cavity is not mated with the air inflow passed into the pressure differential of initial pressure value, then vehicle body cavity has gas leakage, and air-tightness is bad；
If E. air-tightness is bad, start aerosol generator, then find out body in white by visual observations smog leakage point and reveal part；
F. stop blower fan and/or aerosol generator runs, remove poly (methyl methacrylate) plate.
The present invention utilize body in white air tightness detection system to the method for body in white air-leakage test it may also is that
In described step B: described poly (methyl methacrylate) plate is tightly connected by sealant tape with windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on Qianmen, the described body in white left and right sides respectively, all the other holes identical with vehicle body seal each through sealant tape, form the vehicle body cavity sealed.
In described step C: blower fan and aerosol generator are communicated to described vehicle body cavity respectively through sealant tape sealing, sealed by sealant tape between blower fan and described vehicle body cavity and be communicated with air inflow sensor.
Aerosol generator described in described step C connects with the sealing of described vehicle body cavity each through ventilation duct with described blower fan.
One end of described ventilation duct is connected with aerosol generator and blower fan respectively, and the other end of described ventilation duct is tightly connected with the perforate on described poly (methyl methacrylate) plate respectively.
The present invention utilizes the body in white air tightness detection system method to body in white air-leakage test, utilize body in white air tightness detection system and body in white air-leakage test can be carried out completely by above-mentioned steps, therefore it is that cost is low, experimental result accurate relative to the advantage of prior art, body in white air-leakage test can be repeatedly performed, effectively detects air-tightness locating leaks part at short notice, it is ensured that body in white manufactures air-tightness.
Accompanying drawing explanation
Fig. 1 body in white air tightness detection system schematic diagram of the present invention.
Fig. 2 body in white air tightness detection system structure diagram of the present invention.
Figure number explanation
1 ... body in white 2 ... poly (methyl methacrylate) plate 3 ... pressure transducer
4 ... aerosol generator 5 ... blower fan 6 ... air inflow sensor
7 ... vehicle body cavity 8 ... ventilation duct 9 ... sealant tape
Detailed description of the invention
Body in white air tightness detection system and the detection method of the present invention are described in further detail by the Fig. 1 to Fig. 2 below in conjunction with accompanying drawing.
nullThe body in white air tightness detection system of the present invention，Refer to Fig. 1 to Fig. 2，Including at least eight pieces of poly (methyl methacrylate) plates 2、Pressure transducer 3、Aerosol generator 4、Blower fan 5 and air inflow sensor 6，The shape of described poly (methyl methacrylate) plate 2 and size respectively with windowpane on Qianmen, body in white 1 left and right sides、Windowpane on back door, the left and right sides、Left and right sides butterfly windowpane、Front windshield glass window is consistent with rear tailgate windowpane shape and size，Described poly (methyl methacrylate) plate 2 respectively with windowpane on Qianmen, body in white 1 left and right sides、Windowpane on back door, the left and right sides、Left and right sides butterfly windowpane、Front windshield glass window and rear tailgate windowpane are tightly connected and form the vehicle body cavity 7 sealed，Described aerosol generator 4 seals with described vehicle body cavity 7 respectively with described blower fan 5 and connects，Described pressure transducer 3 is positioned at described vehicle body cavity 7，It is provided with and communicated with air inflow sensor 6 between described blower fan 5 and described car operatic tunes body.So when detecting, poly (methyl methacrylate) plate 2 is all used to be closed window all of on body in white 1, the Kong Jun that body in white 1 communicates with the external world is being sealed, overall body in white 1 is made to be internally formed the vehicle body cavity 7 of sealing, start aerosol generator 4 and blower fan 5, the numerical value of record pressure transducer 3 and air inflow sensor 6, the pressure difference value between force value and initial pressure value in the vehicle body cavity 7 of contrast air inflow and body in white 1, determine body in white 1 air-tightness, if there being leakage part, spilling part by smog and determining leakage point.Relative to the advantage of prior art be simple in construction, cost low, can experimental result accurately, poly (methyl methacrylate) plate 2 can recycle and carry out body in white 1 air-leakage test, at short notice effectively detection air-tightness locating leaks part, it is ensured that body in white 1 air-tightness.
The body in white air tightness detection system of the present invention, refer to Fig. 1 to Fig. 2, it may also is that described aerosol generator 4 connects with the sealing of described vehicle body cavity 7 each through ventilation duct 8 with described blower fan 5 on the basis of previously described technical scheme.It is higher that the existence of ventilation duct 8 makes aerosol generator 4 seal, with vehicle body cavity 7, the unfailing performance connected with blower fan 5, because ventilation duct 8 is typically all flexibility, it not at least hard, therefore it is tightly connected and is easier to realize, and in detection process, rock ventilation duct 8 will not destroy the sealing of vehicle body cavity 7.It is preferred that one end that technical scheme is described ventilation duct 8 be connected with aerosol generator 4 and blower fan 5 respectively, the other end of described ventilation duct 8 is tightly connected with the perforate on described poly (methyl methacrylate) plate 2 respectively.Such aerosol generator 4 just can seal with vehicle body cavity 7 with blower fan 5 and connect.
The body in white air tightness detection system of the present invention, refer to Fig. 1 to Fig. 2, it may also is that poly (methyl methacrylate) plate 2 is tightly connected by sealant tape 9 with windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on Qianmen, body in white 1 left and right sides respectively on the basis of previously described technical scheme, described aerosol generator 4 is all connected by sealant tape 9 sealing with described vehicle body cavity 7 with described blower fan 5.The advantage being tightly connected of sealant tape 9 is that sealing effectiveness is relatively good, and windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on poly (methyl methacrylate) plate 2 and Qianmen, body in white 1 left and right sides are not had any impact, dismantle after being bonded and sealed and detecting and be all easier, and sealant tape 9 to seal cost relatively low, draw materials easily, while ensureing to seal connection, reduce the cost of detection system as far as possible.
The present invention utilizes the body in white air tightness detection system method to body in white air-leakage test, refer to Fig. 1 to Fig. 2, comprises the following steps:
A. prepare the body in white 1 of application to be detected, and make and windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane shape and eight pieces of poly (methyl methacrylate) plates 2 of the same size on windowpane, back door, the left and right sides on Qianmen, described body in white 1 left and right sides；
B., pressure transducer 3 is positioned in body in white 1 and is transmitted data wire output outside to body in white 1, poly (methyl methacrylate) plate 2 is tightly connected with windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on Qianmen, described body in white 1 left and right sides respectively, all the other holes identical with vehicle body all seal, and form the vehicle body cavity 7 sealed；
C. blower fan 5 and aerosol generator 4 are sealed respectively and be communicated to described vehicle body cavity 7, seal between blower fan 5 and described vehicle body cavity 7 and be communicated with air inflow sensor 6；
D. start blower fan 5 and/or aerosol generator 4 passes into smog and/or gas in described vehicle body cavity 7, air inflow sensor 6 measures the air inflow passing into vehicle body cavity 7, pressure transducer 3 senses the pressure in vehicle body cavity 7, if the pressure differential of the force value in vehicle body cavity 7 and initial pressure value matches with the air inflow passed into, then vehicle body air-tightness is good, if the force value in vehicle body cavity 7 is not mated with the air inflow passed into the pressure differential of initial pressure value, then vehicle body cavity 7 has gas leakage, and air-tightness is bad；
If E. air-tightness is bad, starts aerosol generator 4, then find out body in white 1 by visual observations smog leakage point and reveal part；
F. stop blower fan 5 and/or aerosol generator 4 runs, remove poly (methyl methacrylate) plate 2.
It utilizes aforesaid body in white air tightness detection system and can carry out body in white 1 air-leakage test completely by above-mentioned steps, it is that cost is low, experimental result accurate relative to the advantage of prior art, body in white 1 air-leakage test can be repeatedly performed, effectively detects air-tightness locating leaks part at short notice, it is ensured that body in white 1 manufactures air-tightness.
The present invention utilizes the body in white air tightness detection system method to body in white air-leakage test, refer to Fig. 1 to Fig. 2, on the basis of technical scheme above, can also is that in described step B: described poly (methyl methacrylate) plate 2 is tightly connected by sealant tape 9 with windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on Qianmen, described body in white 1 left and right sides respectively, all the other holes identical with vehicle body seal each through sealant tape 9, form the vehicle body cavity 7 sealed.The advantage being tightly connected of sealant tape 9 is that sealing effectiveness is relatively good, and windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on poly (methyl methacrylate) plate 2 and Qianmen, body in white 1 left and right sides are not had any impact, dismantle after being bonded and sealed and detecting and be all easier, and sealant tape 9 to seal cost relatively low, draw materials easily, while ensureing to seal connection, reduce the cost of detection system as far as possible.
The present invention utilizes the body in white air tightness detection system method to body in white air-leakage test, refer to Fig. 1 to Fig. 2, on the basis of technical scheme above it may also is that in described step C: blower fan 5 and aerosol generator 4 are communicated to described vehicle body cavity 7 respectively through sealant tape 9 sealing, sealed by sealant tape 9 between blower fan 5 and described vehicle body cavity 7 and be communicated with air inflow sensor 6.Advantage is as previously mentioned.
The present invention utilizes the body in white air tightness detection system method to body in white air-leakage test, refer to Fig. 1 to Fig. 2, on the basis of technical scheme above it may also is that described in described step C, aerosol generator 4 connects with the sealing of described vehicle body cavity 7 each through ventilation duct 8 with described blower fan 5.It is higher that the existence of ventilation duct 8 makes aerosol generator 4 seal, with vehicle body cavity 7, the unfailing performance connected with blower fan 5, because ventilation duct 8 is typically all flexibility, it not at least hard, therefore it is tightly connected and is easier to realize, and in detection process, rock ventilation duct 8 will not destroy the sealing of vehicle body cavity 7.Further preferred technical scheme is that one end of described ventilation duct 8 is connected with aerosol generator 4 and blower fan 5 respectively, and the other end of described ventilation duct 8 is tightly connected with the perforate on described poly (methyl methacrylate) plate 2 respectively.Such aerosol generator 4 just can realize with blower fan 5 sealing with vehicle body cavity 7 connecting.
Utilize the body in white air tightness detection system method to body in white air-leakage test, the pressure detected by pressure transducer and the air inflow sensor of the present invention calculate the pressure differential measurement amount of leakage obtaining body in white；Searching leak area by aerosol generator, result record is in testing record sheet (such as following table), to complete leak detection；
Above-mentioned only several specific embodiments in the present invention are illustrated; but can not as protection scope of the present invention; every equivalence change done according to the design spirit in the present invention or modify or equal proportion zooms in or out, is all deemed to fall protection scope of the present invention.
Claims (9)
- null1. body in white air tightness detection system，It is characterized in that: include at least eight pieces of poly (methyl methacrylate) plates、Pressure transducer、Aerosol generator、Blower fan and air inflow sensor，The shape of described poly (methyl methacrylate) plate and size respectively with windowpane on Qianmen, the body in white left and right sides、Windowpane on back door, the left and right sides、Left and right sides butterfly windowpane、Front windshield glass window is consistent with rear tailgate windowpane shape and size，Described poly (methyl methacrylate) plate respectively with windowpane on Qianmen, the body in white left and right sides、Windowpane on back door, the left and right sides、Left and right sides butterfly windowpane、Front windshield glass window and rear tailgate windowpane are tightly connected and form the vehicle body cavity sealed，Described aerosol generator seals with described vehicle body cavity respectively with described blower fan and connects，Described pressure transducer is positioned at described vehicle body cavity，It is provided with and communicated with air inflow sensor between described blower fan and described car operatic tunes body.
- 2. body in white air tightness detection system according to claim 1, it is characterised in that: described aerosol generator connects with the sealing of described vehicle body cavity each through ventilation duct with described blower fan.
- 3. body in white air tightness detection system according to claim 2, it is characterised in that: one end of described ventilation duct is connected with aerosol generator and blower fan respectively, and the other end of described ventilation duct is tightly connected with the perforate on described poly (methyl methacrylate) plate respectively.
- 4. the body in white air tightness detection system according to any one claim of claims 1 to 3, it is characterized in that: poly (methyl methacrylate) plate is tightly connected by sealant tape with windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on Qianmen, the body in white left and right sides respectively, described aerosol generator is all connected by sealant tape sealing with described vehicle body cavity with described blower fan.
- 5. utilize the method to body in white air-leakage test of the body in white air tightness detection system described in any one claim of claim 1 to 3, it is characterised in that: comprise the following steps:A. prepare the body in white of application to be detected, and make and windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane shape and eight pieces of poly (methyl methacrylate) plates of the same size on windowpane, back door, the left and right sides on Qianmen, the described body in white left and right sides；B. pressure transducer is positioned in body in white and is transmitted data wire and export to body in white, poly (methyl methacrylate) plate is tightly connected with windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on Qianmen, the described body in white left and right sides respectively, all the other holes identical with vehicle body all seal, and form the vehicle body cavity sealed；C. blower fan and aerosol generator are sealed respectively and be communicated to described vehicle body cavity, seal between blower fan and described vehicle body cavity and be communicated with air inflow sensor；D. start blower fan and/or aerosol generator passes into smog and/or gas in described vehicle body cavity, air inflow sensor measures the air inflow passing into vehicle body cavity, pressure in pressure transducer sensing vehicle body cavity, if the pressure differential of the force value in vehicle body cavity and initial pressure value matches with the air inflow passed into, then vehicle body air-tightness is good, if the force value in vehicle body cavity is not mated with the air inflow passed into the pressure differential of initial pressure value, then vehicle body cavity has gas leakage, and air-tightness is bad；If E. air-tightness is bad, start aerosol generator, then find out body in white by visual observations smog leakage point and reveal part；F. stop blower fan and/or aerosol generator runs, remove poly (methyl methacrylate) plate.
- 6. according to claim 5 utilize the body in white air tightness detection system method to body in white air-leakage test, it is characterized in that: in described step B: described poly (methyl methacrylate) plate is tightly connected by sealant tape with windowpane, left and right sides butterfly windowpane, front windshield glass window and rear tailgate windowpane on windowpane, back door, the left and right sides on Qianmen, the described body in white left and right sides respectively, all the other holes identical with vehicle body seal each through sealant tape, form the vehicle body cavity sealed.
- 7. according to claim 5 utilize the body in white air tightness detection system method to body in white air-leakage test, it is characterized in that: in described step C: blower fan and aerosol generator are communicated to described vehicle body cavity respectively through sealant tape sealing, sealed by sealant tape between blower fan and described vehicle body cavity and be communicated with air inflow sensor.
- 8. according to claim 5 utilize the body in white air tightness detection system method to body in white air-leakage test, it is characterised in that: aerosol generator described in described step C and described blower fan seal with described vehicle body cavity each through ventilation duct and connect.
- 9. according to claim 8 utilize the body in white air tightness detection system method to body in white air-leakage test, it is characterized in that: one end of described ventilation duct is connected with aerosol generator and blower fan respectively, the other end of described ventilation duct is tightly connected with the perforate on described poly (methyl methacrylate) plate respectively.
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| CN111811735A (en) * | 2019-04-10 | 2020-10-23 | 浙江吉利汽车研究院有限公司 | Body-in-white sealing performance detection method |
| CN111811735B (en) * | 2019-04-10 | 2022-11-04 | 浙江吉利汽车研究院有限公司 | Body-in-white sealing performance detection method |
| FR3101578A1 (en) * | 2019-10-07 | 2021-04-09 | Compagnie Plastic Omnium Se | Device for checking the tightness of a double-walled motor vehicle panel |
| EP3805723A1 (en) * | 2019-10-07 | 2021-04-14 | Compagnie Plastic Omnium SE | Device for checking the seal of a panel of a motor vehicle with double wall |
| WO2021069500A1 (en) * | 2019-10-07 | 2021-04-15 | Compagnie Plastic Omnium Se | Method for checking the tightness of a double-walled motor vehicle panel via ultrasound sensing |
| FR3105422A1 (en) * | 2019-12-18 | 2021-06-25 | Compagnie Plastic Omnium Se | A method of checking the tightness of a double-walled motor vehicle panel by ultrasound detection |
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| CN112284763A (en) * | 2020-10-23 | 2021-01-29 | 恒大新能源汽车投资控股集团有限公司 | Vehicle sealing performance detection device and system |
| CN112945475A (en) * | 2021-03-01 | 2021-06-11 | 张锦峰 | Building external window air tightness gas flow collecting method |
| CN113212603A (en) * | 2021-03-25 | 2021-08-06 | 东风越野车有限公司 | Special vehicle body-in-white rain sealing control method |
| CN113212603B (en) * | 2021-03-25 | 2022-04-19 | 东风越野车有限公司 | White body rain sealing control method for armored protection special vehicle |
| CN117451273A (en) * | 2023-12-07 | 2024-01-26 | 台玻悦达汽车玻璃有限公司 | Automobile glass tightness detection device |
| CN117451273B (en) * | 2023-12-07 | 2024-05-14 | 台玻悦达汽车玻璃有限公司 | Automobile glass tightness detection device |
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