Double-station airtight leak hunting device for die casting

Abstract

The utility model relates to a double-station airtight leak hunting device for die castings, and belongs to the field of airtight testing of die castings. The device comprises a supporting frame and an air cylinder, a cylinder barrel of the air cylinder is installed at the top of the supporting frame, the device is structurally characterized by further comprising a positioning boss, a lower sealing ring, a pressing block, an upper sealing ring, a pressing plate and a supporting column, a telescopic rod of the air cylinder and the supporting column are both connected with the pressing plate, the pressing block is arranged on the pressing plate, the upper sealing ring is arranged on the pressing block, and the supporting column is arranged on the supporting frame. The positioning boss is arranged on the supporting frame, the lower sealing ring is arranged on the positioning boss, the supporting column penetrates through the supporting frame, the pressing block is matched with the positioning boss, the air pipe connector is installed on the pressing block, the air pipe connector is connected with the air pipe, and the three-way air pipe connector is connected with the air pipe. The air pipe is connected with the three-way air pipe connector, and the three-way air pipe connector is connected with the air tightness tester.

Description

Technical Field

[0001] The utility model relates to a double-station airtight leakage detection device for die castings, belonging to the field of airtight testing of die castings. Background Art

[0002] Since pores and sand holes are easily generated inside the aluminum alloy die-casting product 12, not all pores and sand holes at any position of the aluminum alloy die-casting product 12 will cause the aluminum alloy die-casting product 12 to be scrapped. That is, if pores and sand holes appear at the key sealing position of the product, it will affect the normal use of the product. If pores and sand holes appear at positions other than the key sealing position of the product, it will not affect the normal use of the product. The key sealing position of the product refers to all positions within a closed sealed space formed on the test product 12 after the upper sealing surface 12A and the lower sealing surface 12B of the test product 12 are sealed. If pores or sand holes appear at any position in this sealed space and penetrate the external position, it will cause air leakage after the whole machine is assembled, affecting the performance of the equipment.

[0003] The conventional detection method is to use a flaw detector to detect the pores inside the aluminum alloy die casting product 12, but it cannot identify whether the position of the pores affects the sealing performance of the whole machine. The existing aluminum die casting flaw detection technology can directly filter out products with pores inside and directly scrap them, but not all products with pores are necessarily unqualified products that will affect the performance of the whole machine, so direct scrapping will cause certain waste, that is, scrapping products with pores and sand holes in positions other than the key sealing position of the product will also cause certain waste. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a double-station airtight leak detection device for die-castings with a reasonable structural design. When there are pores inside the product, the product that does not affect the sealing performance of the whole machine assembly (i.e., the product in which the pores and sand holes appear at positions other than the key sealing position of the product) can be screened out, thereby improving the qualified rate of finished products.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: the double-station airtight leak detection device for die-castings includes a support frame and a cylinder, the cylinder barrel of the cylinder is installed on the top of the support frame, and its structural characteristics are: it also includes a positioning boss, a lower sealing ring, a pressure block, an upper sealing ring, a pressure plate and a support column, the telescopic rod and the support column of the cylinder are connected to the pressure plate, the pressure block is arranged on the pressure plate, the upper sealing ring is arranged on the pressure block, the positioning boss is arranged on the support frame, the lower sealing ring is arranged on the positioning boss, the support column and the support frame penetrate, and the pressure block cooperates with the positioning boss.

[0006] Furthermore, it also includes an air pipe joint, an air pipe and a three-way air pipe joint, wherein the air pipe joint is installed on the pressing block, the air pipe joint is connected to the air pipe, and the air pipe is connected to the three-way air pipe joint.

[0007] Furthermore, the three-way air pipe joint is connected to an air tightness tester.

[0008] Furthermore, the support column is connected to the pressure plate by a No. 2 connecting screw, and the pressure block is arranged on the pressure plate by a No. 1 connecting screw.

[0009] Furthermore, the support frame includes a support rod, an upper support plate and a lower support plate, and two ends of the support rod are respectively connected to the upper support plate and the lower support plate.

[0010] Furthermore, the cylinder barrel of the cylinder is installed on the top of the upper support plate, the support column penetrates the upper support plate, and the positioning boss is arranged on the lower support plate.

[0011] Compared with the prior art, the utility model has the following advantages: the double-station airtight leak detection device for die-castings can reduce the scrapping of die-castings due to porosity, and can accurately screen out products with qualified sealing performance. Therefore, the device can not only reduce the scrap rate of products due to porosity factors, but also accurately screen out products with qualified airtightness.

[0012] The double-station airtight leak detection device for die-casting parts can accurately determine whether there is a leakage problem at the sealing position of the product. Other air holes that do not affect the performance of the whole machine are acceptable, which greatly reduces the scrap rate of the product.

[0013] Since there are multiple key sealing positions on a product, it would be time-consuming to test them individually. The airtight leak detection device connects two key sealing positions on the product together and tests them simultaneously through a test air pipe, thereby improving detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic cross-sectional structure diagram of a double-station airtight leak detection device for die castings according to an embodiment of the utility model.

[0015] Figure 2 It is a three-dimensional structural schematic diagram of a double-station airtight leak detection device for die castings according to an embodiment of the utility model.

[0016] Figure 3 It is a three-dimensional structural schematic diagram of a test product according to an embodiment of the utility model.

[0017] Figure 4 It is a three-dimensional structural schematic diagram of a test product according to an embodiment of the utility model.

[0018] In the figure: positioning boss 1, lower sealing ring 2, pressure block 3, upper sealing ring 4, No. 1 connecting screw 5, No. 2 connecting screw 6, pressure plate 7, support column 8, telescopic rod 9, support frame 10, cylinder 11, test product 12, air pipe joint 13, air pipe 14, three-way air pipe joint 15, support rod 16, upper support plate 17, lower support plate 18. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0020] Example

[0021] See also Figures 1 to 4 As shown, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, if there are references to terms such as "upper", "lower", "left", "right", "middle" and "one" in this specification, they are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship, without substantially changing the technical content, should also be regarded as the scope of the implementation of the utility model.

[0022] The double-station airtight leak detection device for die castings in this embodiment includes a positioning boss 1, a lower sealing ring 2, a pressure block 3, an upper sealing ring 4, a pressure plate 7, a support column 8, a support frame 10, a cylinder 11, an air pipe joint 13, an air pipe 14 and a three-way air pipe joint 15.

[0023] The cylinder barrel of the cylinder 11 in this embodiment is installed on the top of the support frame 10, the telescopic rod 9 and the support column 8 of the cylinder 11 are connected to the pressure plate 7, the support column 8 and the pressure plate 7 are connected by a No. 2 connecting screw 6, the pressure block 3 is arranged on the pressure plate 7, the pressure block 3 is arranged on the pressure plate 7 by a No. 1 connecting screw 5, and the upper sealing ring 4 is arranged on the pressure block 3.

[0024] The positioning boss 1 in this embodiment is arranged on the support frame 10, the lower sealing ring 2 is arranged on the positioning boss 1, the support column 8 and the support frame 10 pass through, the pressure block 3 cooperates with the positioning boss 1, the trachea joint 13 is installed on the pressure block 3, the trachea joint 13 is connected to the trachea 14, the trachea 14 is connected to the three-way trachea joint 15, and the three-way trachea joint 15 is connected to the airtightness tester.

[0025] The support frame 10 in this embodiment includes a support rod 16, an upper support plate 17 and a lower support plate 18. The two ends of the support rod 16 are respectively connected to the upper support plate 17 and the lower support plate 18. The cylinder barrel of the cylinder 11 is installed on the top of the upper support plate 17. The support column 8 penetrates the upper support plate 17, and the positioning boss 1 is arranged on the lower support plate 18.

[0026] Specifically, the die-casting double-station airtight leak detection device creates a closed sealed space at the key sealing positions 12A and 12B of the product assembly, inflates the sealed space from the outside and maintains the pressure to detect whether there is leakage in the sealed space.

[0027] Two positioning bosses 1 are set on the lower support plate 18, and a lower sealing ring 2 is provided on the positioning boss 1. When the test product 12 is placed, it can be accurately positioned to ensure that the lower sealing ring 2 can be completely in contact with the 12B position of the sealing surface of the test product 12; two pressing blocks 3 are set on the upper surface of the test product 12, and the pressing blocks 3 can move up and down after being connected to the cylinder 11. An upper sealing ring 4 is provided on the pressing block 3, which can completely cover the 12A position of the sealing surface of the upper surface of the test product 12; a cylinder 11 is set on the upper surface of the test product 12, and pressure is applied from the upper surface of the test product 12, so that the upper sealing ring 4 and the lower sealing ring 2 meet the sealing requirements after being stressed; an inflation hole is provided on the pressing block 3, which is connected to the test air pipe of the airtight tester, and air is inflated into the sealed space to test whether there is leakage.

[0028] The two positioning bosses 1 at the bottom are connected to the lower support plate 18 by screws. The spacing between the two positioning bosses 1 is consistent with the spacing between the two oil seals on the test product 12, so that the positioning of the tested product 12 is accurate when it is placed; two lower sealing rings 2 are respectively provided on the two positioning bosses 1, and the size of the lower sealing ring 2 can just cover the lower plane 12B position of the oil seal position. After the cylinder 11 applies pressure, the lower sealing ring 2 is compressed, which can completely seal the lower plane of the oil seal position.

[0029] The two pressing blocks 3 are connected to the pressing plate 7 by screws, and the middle position of the pressing plate 7 is connected to the telescopic rod 9 of the cylinder 11 by threads. The two pressing blocks 3 can move up and down with the telescopic rod 9 of the cylinder 11; the two pressing blocks 3 are respectively provided with an inflation hole, and air can be inflated from the outside to the inner cavity. The inflation hole is provided with threads, which are connected to the air pipe connector 13 through the threads, so as to conveniently connect the test air pipe of the air tightness tester; the two pressing blocks 3 are respectively provided with a test inflation hole, and a three-way air pipe connector 15 is provided between the two pressing blocks 3 to connect the inflation test holes on both sides together, and the leakage on both sides can be tested simultaneously through one test air pipe.

[0030] Two support columns 8 are respectively provided on the top of the two pressing blocks 3. Since the telescopic rod 9 of the cylinder 11 is installed in the middle position, the force point is in the middle position of the pressing plate 7, and the force points of the two pressing blocks 3 are on both sides of the pressing plate 7. The function of the support columns 8 is to ensure that the pressure blocks 3 on both sides can be evenly stressed, thereby ensuring that the compression force of the upper sealing ring 4 is uniform.

[0031] The cylinder 11 is installed through the support frame 10, and the travel of the telescopic rod 9 of the cylinder 11 is about 150 mm. After the telescopic rod 9 of the cylinder 11 is retracted, the pressing plate 7 and the pressing block 3 are lifted, and the space between the pressing block 3 and the positioning boss 1 is sufficient to operate the picking and placing actions of the test product 12.

[0032] The specific test process is as follows: first, the telescopic rod 9 of the cylinder 11 is in a retracted state, the test product 12 is placed on the positioning boss 1, and the start switch of the airtight tester is pressed; second, the airtight tester controls the cylinder 11 to start, and the telescopic rod 9 of the cylinder 11 descends, driving the pressure plate 7 and the pressure block 3 to move downward, so that the upper sealing ring 4 on the pressure block 3 is pressed on the position 12A on the upper sealing surface of the test product 12, and the upper sealing ring 4 and the lower sealing ring 2 are compressed after being subjected to pressure, so that the pressure block 3 and the test product 12 form a closed sealed space; third, the airtight tester inflates the two closed sealed spaces through the test air pipe for 10s and maintains the pressure for 5s; fourth, the airtight detector starts to detect the gas leakage in the two closed spaces. If the air pressure in the sealed space drops, it means that the sealing position of the test product 12 (i.e. Figure 3 , 4 12A and 12B in the test product 12 are leaking, the airtight tester will automatically alarm and light up a red light. If the air pressure in the sealed space remains unchanged, it means that the sealing position of the test product 12 is not leaking, and the airtight tester will automatically light up a green light, indicating that it is qualified. In the fifth step, after the test is completed, the airtight tester controls the telescopic rod 9 of the cylinder 11 to move upward, and the operator can take out the test product 12 and test the next test product 12.

[0033] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A double-station airtight leak detection device for die castings, comprising a support frame (10) and a cylinder (11), wherein the cylinder barrel of the cylinder (11) is mounted on the top of the support frame (10), characterized in that: It also includes a positioning boss (1), a lower sealing ring (2), a pressure block (3), an upper sealing ring (4), a pressure plate (7) and a support column (8), wherein the telescopic rod (9) of the cylinder (11) and the support column (8) are both connected to the pressure plate (7), the pressure block (3) is arranged on the pressure plate (7), the upper sealing ring (4) is arranged on the pressure block (3), the positioning boss (1) is arranged on the support frame (10), the lower sealing ring (2) is arranged on the positioning boss (1), the support column (8) penetrates the support frame (10), and the pressure block (3) cooperates with the positioning boss (1).

2. The double-station airtight leak detection device for die castings according to claim 1, characterized in that: It also comprises an air pipe joint (13), an air pipe (14) and a three-way air pipe joint (15), wherein the air pipe joint (13) is mounted on the pressing block (3), the air pipe joint (13) is connected to the air pipe (14), and the air pipe (14) is connected to the three-way air pipe joint (15).

3. The double-station airtight leak detection device for die castings according to claim 2, characterized in that: The three-way air pipe joint (15) is connected to an air tightness tester.

4. The double-station airtight leak detection device for die castings according to claim 1, characterized in that: The support column (8) is connected to the pressure plate (7) via a No. 2 connection screw (6), and the pressure block (3) is arranged on the pressure plate (7) via a No. 1 connection screw (5).

5. The double-station airtight leak detection device for die castings according to claim 1, characterized in that: The support frame (10) comprises a support rod (16), an upper support plate (17) and a lower support plate (18), and two ends of the support rod (16) are respectively connected to the upper support plate (17) and the lower support plate (18).

6. The double-station airtight leak detection device for die castings according to claim 5, characterized in that: The cylinder barrel of the air cylinder (11) is mounted on the top of an upper support plate (17), the support column (8) penetrates the upper support plate (17), and the positioning boss (1) is arranged on a lower support plate (18).

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