CN115790989A - Detection device and detection method for detecting sealing performance of automobile standard component - Google Patents

Abstract

The invention relates to a detection device and a detection method for detecting the sealing performance of an automobile standard component, wherein the detection device comprises: the sealing sleeve is hermetically covered on the first side surface of the automobile sheet metal in a detection area surrounding the standard part; the piston comprises a plug arranged in the sealing sleeve and a handle which penetrates through the wall of the sealing sleeve and is connected with the plug; and a water injection portion in fluid communication with the interior of the sealed conduit; wherein the detection device is configured to move the plug via the handle to apply water pressure to the detection area to determine whether water is seeped at the location of the standard on a second side opposite to the first side. The detection device can realize the detection of the sealing performance of the standard component at the component level, and has the advantages of flexible and simple operation, short time consumption and low cost.

Description

Detection device and detection method for detecting sealing performance of automobile standard component

Technical Field

The invention relates to the technical field of vehicle body manufacturing. More specifically, the invention relates to a detection device and a detection method for detecting the tightness of an automobile standard component.

Background

When the vehicle is designed, the space is divided into two parts, one part is a dry area, and the other part is a wet area. The interior of the cab and part of the vehicle cavity are defined as dry areas, which do not allow water or dust to enter, and the exterior of the vehicle, in particular, such that the area under the vehicle floor is defined as wet areas. The body is used for isolating the dry area from the wet area and comprises sheet metal, glass, sealing strips and the like. Since the vehicle body provides mounting points for other parts such as a fuel tank, a chassis and the like, and the vehicle body is generally fixed to the other parts by bolts, nuts or bolts are arranged on the vehicle body.

In order to ensure the strength of standard parts (such as nuts and bolts), the standard parts on the vehicle body need to be provided with openings in the sheet metal of the vehicle body. After the metal plate of the automobile body is perforated, under the wading road condition, especially when the automobile speed is high, water flow can generate huge impact force on the automobile body, and the risk of water leakage is easily generated in the lower floor area of the automobile body. To ensure the sealing performance in this area, manufacturers generally employ pull-riveting or press-riveting standard parts. However, due to the manufacturing tolerance of the parts, manual operation and the like, partial riveting or clinching of the standard part can still be caused to fail to meet the sealing performance.

At present, the vehicle sealing performance is usually tested through tests of road tests, rain tests, wading tests and the like on the whole vehicle level. However, the main defects of the method are that: on one hand, after the problem of the standard component with the sealing problem is solved, the test of the whole vehicle level is still needed, the whole process is long in period, and the cost is high; on the other hand, after the test is finished, because the number of automobile parts is large, part of parts shield the area of the standard part, and the tightness of the area of the standard part is difficult to check.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a detection device and a detection method for detecting the sealing performance of an automobile standard component.

To this end, a first aspect of the invention provides a testing device for testing the tightness of a standard part of a motor vehicle, the testing device comprising: the sealing sleeve is hermetically covered on the first side surface of the automobile sheet metal in a detection area surrounding the standard part; the piston comprises a plug arranged in the sealing sleeve and a handle which penetrates through the wall of the sealing sleeve and is connected with the plug; and a water injection portion in fluid communication with the interior of the sealing sleeve; wherein the detection device is configured to move the plug via the handle to apply water pressure to the detection area to determine whether water is seeped at the location of the standard on a second side opposite to the first side.

According to an alternative embodiment of the invention, the sealing sleeve comprises: the fixing part is fixed to the detection area and limits a first cavity; the hydraulic part is connected with the fixed part in a sealing way and limits a second cavity communicated with the first cavity; the plug is arranged in the second cavity and is matched with the second cavity in size, and the inner wall of the hydraulic part, the end face of the plug, facing the standard part, and the first cavity define a detection cavity with variable volume together.

According to an alternative embodiment of the invention, the fixing portion is provided with a connection hole through which a connection piece matching the standard piece is connected to the standard piece, so as to be suitable for fixing the fixing portion to the detection area.

According to an alternative embodiment of the invention, the hydraulic part is provided with at least one first through hole adapted to allow gas to enter into or exit from the second chamber.

According to an alternative embodiment of the invention, the hydraulic part comprises a second through hole of a size compatible with the handle, so as to be suitable for the handle to be connected to the bulkhead through the second through hole and to be movable relative to the hydraulic part via the second through hole.

According to an alternative embodiment of the invention, the handle is provided with position markers adapted to estimate the value of the water pressure inside the detection chamber according to the size of the handle extending out of the hydraulic part.

According to an alternative embodiment of the invention, the hydraulic section is provided with a water inlet to which the water injection section is connected by a water inlet pipe, and the water inlet pipe is provided with a valve adapted to put the water injection section in communication with the water inlet or to block it.

According to an optional embodiment of the invention, an end surface of the plug facing the standard component is an inclined surface, and an end of the inclined surface far away from the standard component faces the water inlet of the hydraulic part, so that the gas in the detection cavity is discharged along the water inlet.

According to an alternative embodiment of the invention, the detection device further comprises a water pressure gauge connected to the hydraulic pressure portion to measure the water pressure in the detection chamber.

The invention provides a detection method for detecting the sealing performance of an automobile standard component, which comprises the steps of placing the plug in the sealing sleeve close to one side of the standard component, and enabling water to enter the sealing sleeve through a water injection part; after the interior of the sealing sleeve is filled with water, the plug is moved to one side, away from the standard component, of the sealing sleeve through the handle, so that the water in the water injection part is sucked into the sealing sleeve, and then the water injection part and the sealing sleeve are blocked; and moving the choke plug towards one side, close to the standard part, in the sealing sleeve to apply water pressure to the detection area, and observing whether water seeps out at the position of the standard part on the second side surface opposite to the first side surface.

Compared with the prior art, the detection device for detecting the sealing performance of the automobile standard component has multiple beneficial effects, particularly can detect the sealing performance of the standard component at a part level, and simultaneously solves the problem that the sealing performance of all standard component areas cannot be checked after a test. If there is sealed problem in the standard component region, in time change the part detect once more can, need not to overhaul at the whole car level, saved seal test's time and cost.

Drawings

Other features and advantages of the present invention will be better understood by the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof.

FIG. 1 is a schematic view of the overall structure of the device for testing the leak tightness of a standard part of an automobile according to the present invention;

FIG. 2 is an exploded view of the detection device of FIG. 1;

FIG. 3 is a cross-sectional view of the test device of FIG. 1;

FIG. 4 is a schematic view of another embodiment of a testing device for testing the hermeticity of automotive standards according to the present invention;

fig. 5 is a schematic flow diagram of a testing method for testing the leak tightness of a vehicle standard according to the present invention.

It is to be understood that the drawings are not only for purposes of illustration and description of the invention, but also as a definition of the limits of the invention, if necessary.

Detailed Description

The practice and use of the embodiments are discussed in detail below. It should be understood, however, that the specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention.

In the present specification, directional expressions such as "upper", "lower", "top", "bottom", and the like are not absolute, but relative. These directional expressions are appropriate when the respective components are arranged as shown in the drawings, but should be changed accordingly when the positions of the respective components in the drawings are changed. Further, "inner" and "outer" are defined with reference to the radial inner and outer directions of the illustrated detection device.

As shown in fig. 1 and 2, a standard material 61 is provided on the sheet metal 7 of the vehicle body. The detection device for detecting the sealing performance of the automobile standard component comprises a fixing part 1, a hydraulic part 2, a piston 3 and a water injection part 4, wherein the hydraulic part 2 is positioned above the fixing part 1 and connected with the fixing part 1. The fastening part 1 and the hydraulic part 2 together form a sealing sleeve which is arranged on a first side of the vehicle sheet metal 7 and surrounds the detection region of the standard part 61. The fixing part 1 is provided at the top with a coupling hole through which the coupling member 62 is coupled to the standard member 61, thereby fixing the fixing part 1 at a region of one side of the standard member 61 with the fixing part 1 being substantially concentric with the standard member 61. A seal 9 is provided between the fixing portion 1 and the standard 61. In this embodiment, the standard component 61 is a nut, and a bolt is used as the connecting component 62, and the specification of the bolt matches with that of the nut. In the fixing of the fastening section 1, the maximum torque requirement of the standard part 61 cannot be exceeded in order to avoid damage to the nut 61. It will be appreciated that the standard 6 may be other parts, for example, when the standard 61 is a bolt, the coupling 62 is a nut. In this embodiment, the sealing element 9 is a sealing rubber ring, but other sealing devices may be adopted, which is not limited to this. Wherein, the first side face covers the one side of having established detection device for car panel beating 7.

As shown in fig. 2 and 3, the fixing portion 1 includes a first chamber 12, and the hydraulic portion 2 includes a second chamber 21. The lower extreme inner wall of hydraulic pressure portion 2 is provided with the internal thread, and the outer wall top edge of fixed part 1 is provided with the external screw thread with this internal thread assorted, and pitch is as little as possible to guarantee the leakproofness between the screw thread. Thereby, the hydraulic part 2 is screwed tightly to the fixing part 1. The top of the fixing part 1 is provided with at least one third through hole 11, and the first cavity 12 is communicated with the second cavity 21 through the third through hole 11. For example, the top of the fixing part 1 is provided with four arc-shaped through holes uniformly arranged along the circumferential direction. The number and shape of the through holes can be changed according to actual needs.

The piston 3 comprises a handle 31 and a plug 32, and the plug 32 is located in the second cavity 21 and can move up and down relative to the second cavity 21. The inner wall surface of the hydraulic part 2, the lower end surface of the plug and the first cavity 12 together form a sealed detection cavity, and the volume shape of the detection cavity changes along with the movement of the piston. For example, when the piston moves to the bottom end of the second cavity 21, i.e. the upper end of the fixing portion 1, the volume of the detection cavity is minimum; when the piston moves to the topmost end of the second cavity, the volume of the detection cavity is maximum. The top end of the hydraulic part 2 is provided with a second through hole 23, and the size and shape of the second through hole 23 are matched with the diameter of the handle 31, so that the handle 31 can pass through the second through hole 23 to be connected with the plug 32. The handle 31 is provided with an external thread, and the second through hole 23 is provided with an internal thread matching the external thread, so that the handle 31 can push the plug 32 into the second cavity 21 by clockwise rotation. The handle 31 is also provided with a size mark, and the water pressure in the detection cavity can be calculated according to the size of the handle 31 entering the hydraulic part 2. The maximum outer diameter of the plug 32 is consistent with the diameter of the inner wall of the second cavity 21, so that the airtightness of the detection cavity can be ensured. The top end of the hydraulic part 2 is also provided with a first through hole 22 for allowing gas to flow out of or into the second chamber 21. Therefore, the pressure in the second cavity 21 except the detection cavity part can be balanced with the external pressure during the movement of the piston 3.

The water injection part 4 includes a funnel 41, a water inlet pipe 42, and a valve 43. The hydraulic section 2 is provided with a water inlet 24. The inlet pipe 42 is connected to the inlet port 24 at one end and to the funnel 41 at the other end, and a valve 43 is provided at a position of the inlet pipe 42 adjacent to the inlet port 24. In addition, the hopper 41 may also be a water tank or other water storage device, and the invention is not limited thereto.

The lower end face 321 of the piston head 32 is provided as an inclined face, and the upper end faces the water inlet 24 of the hydraulic section 2. If gas is present in the detection chamber, it is inconvenient to estimate the magnitude of the water pressure in the detection chamber from the size marks on the handle 31 because the gas is easily compressed. The lower end face of the piston head 32 is provided with an inclined surface, so that gas in the detection cavity can be easily discharged along the water filling port in the water filling process, and the whole detection cavity is filled with water. The direction indicated by the dotted arrows in fig. 5 (7) and fig. 8 (8) is the direction in which the gas in the detection chamber flows out during water injection.

Thereby, the piston 3 can be moved to apply water pressure to the detection area of the standard 61 to judge whether or not water seeps around the position of the standard 61 on the second side surface opposite to the first side surface. If after a certain period of time no water has seeped out, this indicates that the seal of the standard 61 is good. The second side surface is the other side surface opposite to the first side surface of the automobile sheet metal 7.

As shown in fig. 4, in an embodiment variation, a water pressure gauge 11 in communication with the detection chamber may be provided on the hydraulic part 2 to accurately display the value of the water pressure in the detection chamber.

As shown in fig. 5, the installation and detection method of the detection device for detecting the sealing performance of the automobile standard component of the invention comprises the following steps:

s1, sealing and covering a fixing part 1 on a first side surface of an automobile sheet metal 7 and surrounding a detection area of a standard part 61, and then fixing the fixing part 1 on the sheet metal 7 through a connecting part 62;

s3, fixing the hydraulic part 2 with the fixing part 1 through threads on the inner wall of the lower end of the hydraulic part;

s4, the handle 31 penetrates through the hydraulic part 2 to be connected to the plug 32, and it is required to be ensured that the plug 32 cannot rotate along with the handle 31 in the installation process;

s5, placing the plug 32 at the bottom end of the second cavity 21, installing the funnel 41 on the water inlet 24 through the water inlet pipe 42, and slowly injecting water;

s6, after the funnel 41 is filled with water, sufficient water still needs to be ensured, the handle 31 is rotated anticlockwise to enable the plug 32 to move upwards so as to form negative pressure in the detection cavity, the water in the funnel 41 is sucked into the detection cavity, and the valve 43 is closed when the plug 32 moves to the top end of the second cavity;

s7, rotating the handle 31 clockwise to enable the plug 32 to move downwards and continuously compress the water in the detection cavity until a target pressure value is reached;

s8, waiting for a period of time, observing whether water seeps out of the position, close to the position where the standard part 61 is located, of a second side face opposite to the first side face, and if no water seeps out of the position, determining that the sealing performance of the standard part 61 is good;

and S9, moving the plug 32 to the topmost end of the second cavity, releasing the pressure in the detection cavity, opening the valve 43 and moving the plug 32 downwards to discharge water in the detection cavity to the funnel 41.

In step S1, when the standard member 61 is a nut, the connecting member 62 is a bolt, and the fixing portion 1 is connected to the region on the side of the standard member 61 by passing the bolt through the nut. A sealing element 9 can be arranged between the fixing part 1 and the sheet metal 7, and the position of the sealing element 9 is concentric with the standard part 61 as much as possible, so that the standard part 61 is uniformly pressed. Further, it should be noted that step S4 is only an equipment installation process, and it is not necessary to repeatedly install the handle 31 to the plug 32 at the time of the later test. The plug 32 can not rotate along with the handle 31 in the installation process so that the higher end of the lower end face of the inclined plug 32 faces the water inlet 24 of the hydraulic part 2 after the installation is completed, and then when the plug 32 moves to the bottommost end of the second cavity 21, the higher end of the lower end face faces the water inlet 24 of the hydraulic part 2, so that bubbles in the detection cavity can be smoothly discharged along the water inlet 24.

Therefore, the sealing detection cavity is formed in the area where the standard part is located on one side of the automobile sheet metal, water and pressure are injected into the sealing detection cavity, and the water seepage condition of the other side of the automobile sheet metal at the position where the standard part is located is observed to judge the sealing performance of the standard part. The detection method provided by the invention realizes the detection of the sealing performance of the standard component at the component level, and in the detection process, a certain water pressure can be applied to the standard component, so that the standard component is closer to the situation that water flow impacts the standard component in actual use, and the detection method is flexible and simple to operate, short in time consumption and low in cost.

The technical contents and technical features of the present invention have been disclosed above, however, it is understood that those skilled in the art can make various changes and modifications to the concept disclosed above under the inventive idea of the present invention, but all fall into the scope of the present invention.

The above description of embodiments is intended to be illustrative, and not restrictive, the scope of the invention being indicated by the claims.

Claims (10)

1. The utility model provides a detection device for detecting car standard component leakproofness, the standard component is fixed in the trompil of car panel beating, its characterized in that, detection device includes:

the sealing sleeve is hermetically covered on the first side surface of the automobile sheet metal and arranged in a detection area surrounding the standard part;

the piston comprises a plug arranged in the sealing sleeve and a handle which penetrates through the wall of the sealing sleeve and is connected with the plug; and

a water injection section in fluid communication with the interior of the sealed conduit;

wherein the detection device is configured to move the plug via the handle to apply water pressure to the detection area to determine whether water is seeped at the location of the standard on a second side opposite to the first side.

2. The seal detection apparatus of claim 1, wherein the sealing sleeve comprises:

the fixing part is fixed to the detection area and limits a first cavity; and

the hydraulic part is connected with the fixed part in a sealing way and limits a second cavity communicated with the first cavity;

the plug is arranged in the second cavity and is matched with the second cavity in size, and the inner wall of the hydraulic part, the end face of the plug, facing the standard part, and the first cavity define a detection cavity with variable volume together.

3. The seal detection apparatus according to claim 2,

the fixing part is provided with a connecting hole, and a connecting piece matched with the standard part penetrates through the connecting hole to be connected with the standard part so as to be suitable for fixing the fixing part to the detection area.

4. The seal detection apparatus according to claim 2,

the hydraulic part is provided with at least one first through hole adapted to allow gas to enter or exit the second chamber.

5. The seal detection apparatus according to claim 2,

the hydraulic part comprises a second through hole matched with the handle in size, so that the handle is suitable for being connected to the plug through the second through hole and can move relative to the hydraulic part through the second through hole.

6. The seal detection apparatus according to claim 5,

the handle is provided with a position mark so as to be suitable for calculating the water pressure value in the detection cavity according to the size of the handle extending into the hydraulic part.

7. The seal detection apparatus according to claim 2,

the hydraulic pressure portion is provided with the water inlet, the water injection portion through advance water piping connection to the water inlet, and the inlet tube is provided with and is suitable for the messenger the water injection portion with the water inlet intercommunication or block the valve.

8. The seal detection apparatus according to claim 7,

the end face, facing the standard part, of the plug is an inclined face, and one end, far away from the standard part, of the inclined face faces the water inlet of the hydraulic part, so that gas in the detection cavity is discharged along the water inlet.

9. The seal detection apparatus according to claim 2,

the detection device further comprises a water pressure gauge connected with the hydraulic part to measure the water pressure in the detection cavity.

10. A test method for testing the leak tightness of a vehicle standard, comprising:

providing a test device for testing the leak tightness of automotive standards according to any one of claims 1 to 9;

placing the plug in one side of the sealing sleeve close to the standard part, and enabling water to enter the sealing sleeve through a water injection part;

after the interior of the sealing sleeve is filled with water, the plug is moved to one side, away from the standard component, of the sealing sleeve through the handle, so that the water in the water injection part is sucked into the sealing sleeve, and then the water injection part and the sealing sleeve are blocked;

and moving the choke plug towards one side, close to the standard part, in the sealing sleeve to apply water pressure to the detection area, and observing whether water seeps out at the position of the standard part on the second side surface opposite to the first side surface.

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