Automobile die-casting metal motor housing heating airtightness detection equipment

Abstract

The utility model relates to an automobile die-casting metal motor housing heating airtightness detection device, which comprises a rack, a heating box, a high-frequency heater, a plugging tool and a leak hunting assembly, and is characterized in that the rack is provided with a workbench, the workbench is provided with the heating box, the heating box is used for heating a motor housing, the rack is provided with the high-frequency heater located above the heating box, and the plugging tool is used for plugging the motor housing. The workbench is provided with a heat preservation box located on the right side of the heating box, the heat preservation box is used for containing the heated motor housing, the workbench is provided with a blocking tool located above the heat preservation box, and the blocking tool is used for blocking the top opening area of the heated motor housing located on the inner side of the heat preservation box. According to the utility model, the airtightness of the motor housing is detected in a heating state, and compared with a conventional normal temperature detection method, the airtightness detection device can reflect the sealing condition of a part in actual use more truly, thereby evaluating the airtightness of the part at a high temperature more accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to a heating air tightness detection device for a die-cast metal motor housing of an automobile. Background Art

[0002] With the advent of the era of automobile electrification, the requirements for airtightness of automobile aluminum alloy parts are getting higher and higher. For example, the requirements for sealing of electronic control housings, battery housings, and motor housings are getting higher and higher. The traditional method of airtightness detection at room temperature cannot test the sealing state of parts after high temperature is generated under the actual vehicle operation state. The conventional use of hot water detection creates risks due to the water-free requirement for parts, and is inefficient and has a high risk of missed detection. The heat exchange between the temperature of the heated product and the gas will have an adverse effect on the test results. The present invention invents a device for airtightness detection of aluminum alloy parts after heating. It effectively simulates the airtight state of automobile aluminum alloy parts after being heated in the actual vehicle operation state. It also effectively detects the airtightness value, providing reliable data support for parts to be assembled to automobiles in the future. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a heating airtightness detection device for a die-cast metal motor housing of an automobile in view of the above shortcomings.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A heating airtightness detection device for a die-cast metal motor housing of an automobile, comprising a frame, a heating box, a high-frequency heater, a plugging tool and a leak detection component, wherein a workbench is arranged on the frame, a heating box is arranged on the workbench, the heating box is used to heat the motor housing, a high-frequency heater is arranged on the frame above the heating box, an insulation box is arranged on the workbench and is located on the right side of the heating box, the insulation box is used to place the heated motor housing, a plugging tool is arranged on the workbench and is located above the insulation box, the plugging tool is used to plug the high-frequency heater located above the insulation box, and the high-frequency heater is arranged on the frame above the heating box. The top opening area of ​​the inner heated motor cover, the frame is also provided with a leak detection component, the high-frequency heater is used to heat the motor cover inside the heating box, and after heating, the staff carries it to the inside of the insulation box, and seals the top area of ​​the motor cover by a sealing tool, the leak detection component is used to inject heated air into the inside of the motor cover in the insulation box, the leak meter on the leak detection component is used to determine the air tightness by detecting the change of air pressure in the motor cover, and the insulation air source of the leak detection component is connected with the first connecting port of the motor cover through an air pipe penetrating the insulation box.

[0006] Furthermore, a workpiece entrance is provided at the top of the heating box and the insulation box, and a heating wire is provided inside the insulation box, and the heating wire is used to keep the insulation box warm.

[0007] Furthermore, the high-frequency heater can be moved horizontally forward and backward on the frame driven by the electric slide rail, and the high-frequency heater can be raised or lowered driven by the hydraulic rod.

[0008] Furthermore, the outer contour of the blocking fixture is the same as the outer contour of the top area of ​​the motor cover, and the blocking fixture can move horizontally left and right on the frame driven by another electric slide rail, and the blocking fixture can rise or fall under the drive of another hydraulic rod.

[0009] Furthermore, the leak detection component includes an insulation air source, a pressure regulating valve, an air control valve, a pressure display gauge, a mercury box and a leakage meter. The frame is provided with an insulation air source, the insulation air source is connected with the motor cover through an air pipe, the air pipe between the insulation air source and the motor cover is provided with a pressure regulating valve, the end of the pressure regulating valve away from the insulation air source is provided with an air control valve, a mercury box is provided on the rear side of the frame, a partition is vertically provided on the inner side of the mercury box, the partition divides the air area in the mercury box into left and right sides, namely a left mercury box and a right mercury box, the mercury in the left mercury box and the right mercury box are connected, the air area above the left mercury box is connected with the second connecting port of the motor cover through the air pipe, the air pipe between the left mercury box and the insulation box is provided with a pressure display gauge, the air area above the right mercury box is connected with the output end of the leakage meter through the air pipe, and the input end of the leakage meter is connected with the balance air source through the air pipe.

[0010] Furthermore, the insulation air source, pressure regulating valve, air control valve, motor cover, mercury box, leak meter and balancing air source are connected in series through an air pipe. The heated air output by the insulation air source enters the air area above the left mercury box through the second connecting port of the motor cover. The normal temperature gas output by the balancing air source enters the air area above the right mercury box through the leak meter. The leak meter is used to detect the pressure value inside the closed pressure space.

[0011] Furthermore, a circle of high-temperature resistant rubber hollow plugs is provided on the outside of the air pipes inserted into the first connecting port and the second connecting port, and the high-temperature resistant rubber hollow plugs are used to seal the gap between the air pipe and the connecting port.

[0012] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0013] The utility model performs airtight detection on the motor cover in a heated state, which can more truly reflect the sealing condition of the components in actual use, improve the accuracy and reliability of detection, and can effectively simulate the high temperature environment of automobile aluminum alloy components in actual operating conditions, so as to more accurately evaluate the airtight performance of the components at high temperatures; the design of the heat preservation box enables the heated motor cover to maintain a stable temperature, thereby avoiding the influence of temperature fluctuations on the detection results; the mercury box is separated into a left mercury box and a right mercury box, and the left mercury box and the right mercury box are arranged according to the principle of a communicating vessel, so that the heated air output by the heat preservation gas source can be effectively isolated from the leak meter, avoiding the heated air from damaging the internal parts of the leak meter, and can also ensure that the pressure of the enclosed space on one side of the leak meter is stable, so as to facilitate the accurate monitoring of the pressure change on one side of the motor cover.

[0014] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a front view of the utility model;

[0017] Figure 3 It is a rear view of the utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the leakage detection component and the motor housing;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the motor cover;

[0020] Figure 6 It is a top view of the three-dimensional structure of the motor cover.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Rack; 2. Heating box; 3. High-frequency heater; 4. Sealing tool; 5. Leak detection assembly; 6. Workbench; 7. Insulation box; 701. Heating wire; 8. Insulation gas source; 9. Pressure regulating valve; 10. Air control valve; 11. Pressure display gauge; 12. Mercury box; 1201. Mercury left box; 1202. Mercury right box; 13. Leakage meter; 14. Balance gas source; 15. Partition; 16. First connecting port; 17. Second connecting port. DETAILED DESCRIPTION

[0023] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0025] like Figure 5-6 As shown, the motor housing applicable to the present invention is provided with openings at both the upper and lower ends, and a first connecting port 16 and a second connecting port 17 are also provided on the side.

[0026] like Figure 1-6 As shown, a heating airtightness detection device for a die-cast metal motor housing of an automobile comprises a frame 1, a heating box 2, a high-frequency heater 3, a plugging tool 4 and a leak detection component 5. The frame 1 is provided with a workbench 6, the workbench 6 is provided with a heating box 2, the heating box 2 is used to heat the motor housing, the frame 1 is provided with a high-frequency heater 3 located above the heating box 2, the workbench 6 is provided with an insulation box 7 located on the right side of the heating box 2, the insulation box 7 is used to place the heated motor housing, the workbench 6 is provided with a plugging tool 4 located above the insulation box 7, the plugging tool 4 is used to plug the high-frequency heater 3 located above the heating box 2, and the high-frequency heater 3 located above the heating box 2 is used to heat the motor housing. The top opening area of ​​the heated motor cover inside the insulation box 7, the frame 1 is also provided with a leak detection component 5, the high-frequency heater 3 is used to heat the motor cover inside the heating box 2, and after heating, it is carried to the inside of the insulation box 7 by the staff, and the top area of ​​the motor cover is sealed by the sealing tool 4, the leak detection component 5 is used to inject heated air into the inside of the motor cover in the insulation box 7, the leak meter 13 on the leak detection component 5 is used to determine the air tightness by detecting the change of air pressure in the motor cover, and the insulation air source 8 of the leak detection component 5 is connected with the first connecting port 16 of the motor cover through the air pipe penetrating the insulation box 7.

[0027] As an implementation mode, a workpiece entrance is provided at the top of the heating box 2 and the insulation box 7 , and a heating wire 701 is provided inside the insulation box 7 , and the heating wire 701 is used to keep the insulation box 7 warm.

[0028] As an implementation mode, the high-frequency heater 3 can be moved horizontally forward and backward on the frame 1 driven by an electric slide rail, and the high-frequency heater 3 can be raised or lowered driven by a hydraulic rod.

[0029] As an implementation mode, the outer contour of the blocking tool 4 is the same as the outer contour of the top area of ​​the motor cover. The blocking tool 4 can move horizontally left and right on the frame 1 driven by another electric slide rail, and the blocking tool 4 can rise or fall driven by another hydraulic rod.

[0030] As an embodiment, the leak detection component 5 includes an insulation gas source 8, a pressure regulating valve 9, an air control valve 10, a pressure display gauge 11, a mercury box 12 and a leak meter 13. The frame 1 is provided with an insulation gas source 8, and the insulation gas source 8 is connected to the motor housing through an air pipe. The air pipe between the insulation gas source 8 and the motor housing is provided with a pressure regulating valve 9, and the end of the pressure regulating valve 9 away from the insulation gas source 8 is provided with an air control valve 10. The rear side of the frame 1 is provided with a mercury box 12, and a partition 15 is vertically provided inside the mercury box 12. The partition 15 divides the mercury box 12 into a plurality of mercury boxes. The air area is divided into a left side and a right side, namely a mercury left box 1201 and a mercury right box 1202. The mercury in the left mercury box 1201 and the right mercury box 1202 are connected. The air area above the left mercury box 1201 is connected to the second connecting port 17 of the motor cover through an air pipe. A pressure display gauge 11 is provided on the air pipe between the left mercury box 1201 and the insulation box 7. The air area above the right mercury box 1202 is connected to the output end of the leakage meter 13 through the air pipe, and the input end of the leakage meter 13 is connected to the balance air source 14 through the air pipe.

[0031] As an implementation mode, the insulation air source 8, the pressure regulating valve 9, the air control valve 10, the motor cover, the mercury box 12, the leak meter 13 and the balancing air source 14 are connected in series through an air pipe. The heated air output by the insulation air source 8 enters the air area above the mercury left box 1201 through the second connecting port 17 of the motor cover. The normal temperature gas output by the balancing air source 14 enters the air area above the mercury right box 1202 through the leak meter 13. The leak meter 13 is used to detect the pressure value inside the closed pressure space.

[0032] As an embodiment, a circle of high temperature resistant rubber hollow plugs is provided on the outside of the air pipes inserted into the first connecting port 16 and the second connecting port 17, and the high temperature resistant rubber hollow plugs are used to seal the gap between the air pipe and the connecting port.

[0033] In the present invention, the setting pressure of the pressure regulating valve 9 is equal to the setting pressure of the leakage meter 13 .

[0034] The working process of the utility model is as follows: the staff places the automobile motor housing to be tested in the heating box 2, prepares for heating, lowers the high-frequency heater 3 into the heating box 2 through the hydraulic rod, starts the high-frequency heater 3, heats the motor housing in the heating box 2, and simulates the high-temperature environment under the actual operation state. After the heating is completed, the staff moves the heated motor housing to the insulation box 7 to keep its temperature stable and avoid the influence of temperature fluctuation on the test results, and uses the blocking tool 4 to block the top area of ​​the heated motor housing located inside the insulation box 7;

[0035] Then, the heat preservation gas source 8, the motor cover, the mercury box 12, the leak meter 13 and the balance gas source 14 are connected in sequence through the air pipe. The heated gas source is adjusted to a certain pressure through the pressure regulating valve 9 and enters the inner side of the motor cover through the precision air control valve 10. At the same time, the balance air pressure at the leak meter end opens its internal valve body according to the pressure requirement set by the leak meter, and the mercury right box 1202 is inflated to reach the set pressure. After the pressure display gauge 11 of the mercury left box 1201 reaches the inflation pressure, the precision air control valve 10 is closed to maintain the pressure inside the motor cover. After the mercury right box 1202 reaches the pressure set by the leak meter 13, the pressure maintenance program is entered. After a period of pressure maintenance, the test phase begins. If the airtightness of the motor cover is poor, the air pressure inside the left mercury box 1201 decreases, and the liquid level of the mercury tank 12 rises toward the left mercury box 1201. Then the container related to the right mercury box 1202 becomes larger, and the air pressure decreases. The size of the leakage can be tested by the pressure differential sensor inside the leak meter 13. After the test is completed, the instrument outputs the test results and test values ​​and saves the data; if the airtightness of the motor cover is good, the pressure values ​​of the left mercury box 1201 and the right mercury box 1202 will not change.

[0036] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A heating airtightness detection device for automobile die-cast metal motor housing, characterized in that: The invention comprises a frame (1), a heating box (2), a high-frequency heater (3), a plugging tool (4) and a leak detection component (5); the frame (1) is provided with a workbench (6); the workbench (6) is provided with a heating box (2); the heating box (2) is used to heat a motor housing; the frame (1) is provided with a high-frequency heater (3) located above the heating box (2); the workbench (6) is provided with a heat preservation box (7) located on the right side of the heating box (2); the heat preservation box (7) is used to place the heated motor housing; the workbench (6) is provided with a plugging tool (4) located above the heat preservation box (7); the plugging tool (4) is used to plug the high-frequency heater (3) located above the heat preservation box (7); The top opening area of ​​the heated motor cover inside, the frame (1) is also provided with a leak detection component (5), the high-frequency heater (3) is used to heat the motor cover inside the heating box (2), after heating, the worker moves it to the inside of the insulation box (7), and the top area of ​​the motor cover is sealed by a sealing tool (4), the leak detection component (5) is used to inject heated air into the inside of the motor cover in the insulation box (7), the leak meter (13) on the leak detection component (5) is used to determine the air tightness by detecting the change of air pressure in the motor cover, and the insulation air source (8) of the leak detection component (5) passes through the insulation box (7) through the air pipe and is connected to the first connecting port (16) of the motor cover.

2. The automotive die-cast metal motor housing heating airtightness detection equipment according to claim 1 is characterized in that: The tops of the heating box (2) and the insulation box (7) are provided with workpiece entrances, and a heating wire (701) is arranged inside the insulation box (7), and the heating wire (701) is used to keep the inside of the insulation box (7) warm.

3. The automotive die-cast metal motor housing heating airtightness detection equipment according to claim 1 is characterized in that: The high-frequency heater (3) can be moved horizontally forward and backward on the frame (1) driven by an electric slide rail, and the high-frequency heater (3) can be raised or lowered driven by a hydraulic rod.

4. The automotive die-cast metal motor housing heating airtightness detection equipment according to claim 1 is characterized in that: The outer contour of the blocking fixture (4) is the same as the outer contour of the top area of ​​the motor housing. The blocking fixture (4) can be moved horizontally left and right on the frame (1) driven by another electric slide rail. The blocking fixture (4) can be raised or lowered driven by another hydraulic rod.

5. The automotive die-cast metal motor housing heating airtightness detection equipment according to claim 1 is characterized in that: The leak detection assembly (5) comprises a heat preservation gas source (8), a pressure regulating valve (9), an air control valve (10), a pressure display gauge (11), a mercury box (12) and a leak meter (13). The frame (1) is provided with a heat preservation gas source (8), the heat preservation gas source (8) is connected to the motor housing through an air pipe, the air pipe between the heat preservation gas source (8) and the motor housing is provided with a pressure regulating valve (9), the end of the pressure regulating valve (9) away from the heat preservation gas source (8) is provided with an air control valve (10), the rear side of the frame (1) is provided with a mercury box (12), the inner side of the mercury box (12) is vertically provided with a partition (15), the partition (15) separates the mercury box (12) from the inner side of the mercury box (12) ) is divided into a left and a right mercury box (1201), respectively; the mercury in the left mercury box (1201) and the right mercury box (1202) are connected; the air area above the left mercury box (1201) is connected to the second connecting port (17) of the motor housing through an air pipe; a pressure display gauge (11) is provided on the air pipe between the left mercury box (1201) and the insulation box (7); the air area above the right mercury box (1202) is connected to the output end of the leakage meter (13) through the air pipe; and the input end of the leakage meter (13) is connected to the balance air source (14) through the air pipe.

6. The automotive die-cast metal motor housing heating airtightness detection equipment according to claim 1 is characterized in that: The heat-insulating air source (8), the pressure regulating valve (9), the air control valve (10), the motor cover, the mercury box (12), the leak meter (13) and the balancing air source (14) are connected in series via an air pipe. The heated air output by the heat-insulating air source (8) enters the air area above the mercury left box (1201) via the second connecting port (17) of the motor cover. The normal temperature gas output by the balancing air source (14) enters the air area above the mercury right box (1202) via the leak meter (13). The leak meter (13) is used to detect the pressure value inside the closed pressure space.

7. The automotive die-cast metal motor housing heating airtightness detection equipment according to claim 1 is characterized in that: A circle of high-temperature resistant rubber hollow plugs is arranged on the outside of the air pipes inserted into the first connecting port (16) and the second connecting port (17), and the high-temperature resistant rubber hollow plugs are used to seal the gap between the air pipe and the connecting port.

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