A device for detecting the performance of internal pores of a product

Abstract

The utility model relates to product performance detection equipment technical field discloses a kind of performance detection devices of product internal blowhole, including bottom plate and top plate, and the bottom plate is connected with top plate by support column, and the bottom plate is equipped with mainboard, and the mainboard is detachably equipped with lower mounting plate, and the lower mounting plate is equipped with multiple limit blocks, multiple isohypse column and plugging assembly, multiple limit blocks are set along product edge direction, and the isohypse column is attached with product bottom, and multiple plugging block plugging the internal passage of product, and the bottom plate is equipped with the vacuum tank with opening downward between top plate, and the vacuum tank bottom is equipped with the connecting plate sliding connection with support column, and the vacuum tank is detachably equipped with upper mounting plate in top, and the upper mounting plate is equipped with multiple for pressing head for pressing product. The utility model is intended to realize the automatic detection of product performance, and reduce detection cost.

Description

Technical Field

[0001] This utility model relates to the technical field of product performance testing equipment, specifically to a device for testing the performance of internal pores in a product. Background Technology

[0002] In industrial manufacturing, casting is a common and crucial forming process. Casting allows materials such as metals to be melted into a molten state, poured into a specific mold, and then cooled and solidified to obtain a product of the desired shape and size. However, during the casting process, due to various complex factors, such as gases trapped during metal melting, failure to expel gases from the mold cavity in a timely manner, and shrinkage of the molten metal during solidification, pores can easily form inside the product. The presence of these pores has a serious negative impact on product quality, significantly reducing its strength. Under external forces, pores easily become stress concentration points, leading to premature fracture or damage, greatly shortening the product's lifespan, increasing the failure rate, and posing safety hazards. To effectively detect the internal porosity of hard products and assess product quality, performance testing devices already exist. Some devices employ ultrasonic testing technology, which works by utilizing the reflection and refraction of ultrasonic waves when they encounter defects such as pores as they propagate through the material. By receiving and analyzing the reflected ultrasonic signals, the presence, location, and size of pores can be determined. Other devices use radiographic testing techniques, such as X-ray or gamma-ray detection. These utilize the different absorption rates of rays at varying densities as they penetrate the product; pores, due to their lower density, absorb less radiation, creating different images on the imaging device to detect porosity. Finally, some devices employ vacuum testing methods, placing the product in a vacuum environment and injecting a specific gas inside to observe gas leakage, thereby determining the presence and sealing performance of pores.

[0003] However, the results of ultrasonic testing are easily affected by factors such as product materials and surface roughness. Different materials have different propagation speeds and attenuation rates for ultrasonic waves, and surface roughness alters the reflection and scattering of ultrasonic waves, which may lead to inaccurate detection signals and affect the accuracy of pore detection, resulting in misjudgments or missed detections. While X-ray testing can visually display images of internal pores in a product, radiation poses certain radiation hazards to the human body. Vacuum testing requires a high degree of product sealing, and the testing devices are mostly complex in structure and cumbersome in operation, requiring specialized technicians for operation and maintenance. Its testing efficiency is relatively low, and currently, most methods use helium for testing, which is expensive, making it too costly for small businesses and limiting its widespread application. Utility Model Content

[0004] The present invention aims to provide a device for testing the performance of internal pores of a product, so as to realize the automatic testing of product performance and reduce testing costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A performance testing device for internal pores of a product includes a base plate and a top plate, which are connected by a support column. A main plate is mounted on the base plate, and a lower mounting plate is detachably mounted on the main plate. The lower mounting plate has multiple limiting blocks, multiple leveling posts, and sealing components. The limiting blocks are arranged along the edge of the product, the leveling posts are in contact with the bottom of the product, and the sealing blocks seal the internal channels of the product. A downward-opening vacuum chamber is located between the base plate and the top plate. The bottom of the vacuum chamber has a connecting plate that is slidably connected to the support column. An upper mounting plate is detachably mounted on the top of the vacuum chamber, and multiple pressing heads for pressing the product are mounted on the upper mounting plate.

[0006] The principle and advantages of this scheme are: 1. It features a high degree of integration and automation, integrating multiple key steps such as workpiece positioning, clamping, sealing, vacuuming, gas filling, testing, and gas recovery into one device. The clamping of the product and the sealing of the internal channels can be automatically completed by the lifting and lowering of the vacuum chamber, reducing manual intervention and operation time, avoiding fluctuations in test results caused by human operation differences, and significantly improving testing efficiency and reliability.

[0007] 2. The clamping head inside the vacuum chamber descends synchronously with the vacuum chamber, automatically clamping the product and reinforcing the seal between the sealing block and the internal channel opening of the product while establishing a testing vacuum environment. Multiple operations are completed in one action, improving testing efficiency.

[0008] 3. The lower mounting plate is detachably mounted on the main board, and the upper mounting plate is detachably mounted on the top of the vacuum chamber. The positions and quantities of the limiting blocks, leveling posts, and sealing blocks on different lower mounting plates are different, as are the positions and quantities of the clamping heads on different upper mounting plates. This modular design allows the testing device to match the testing requirements of different products. By replacing the mounting plates pre-configured for different products, it can quickly adapt to products with different shapes, sizes, and internal channel layouts, expanding the applicability of the device and reducing the cost and time of developing special inspection tools for new products.

[0009] Preferably, as an improvement, the sealing assembly includes multiple sealing blocks, each with a different shape, and arranged according to the position of the internal channel of the product. Each sealing block is provided with an air passage for airflow into the internal channel of the product.

[0010] Technical effect: The above-mentioned settings in this solution ensure that each sealing block can accurately match and tightly seal the internal channel opening of the corresponding shape and position, and can closely fit the internal channel opening of the product to ensure complete sealing and prevent gas leakage during the testing process.

[0011] Preferably, as an improvement, the sealing block has a sealing ring on the side edge that contacts the product.

[0012] Technical effect: The above-mentioned settings in this solution further enhance the sealing between the sealing block and the internal channel of the product, effectively compensate for processing errors and surface unevenness, and prevent high-pressure gas from leaking from the contact surface.

[0013] Preferably, as an improvement, the top of the equal-height column is provided with a raised rubber block.

[0014] Technical benefits: The above-mentioned design provides flexible contact and cushioning for the product, which can prevent the hard support columns from scratching or crushing the finished surface of the product, and can also better adapt to the bottom contour of the product through slight deformation, thereby increasing the stability and reliability of positioning.

[0015] Preferably, as an improvement, the lower mounting plate is further provided with multiple height-limiting posts.

[0016] Technical effect: The above settings in this solution are equivalent to a mechanical hard limit, which can precisely control the final pressing position of the clamping head and prevent damage to expensive products or testing equipment due to excessive clamping force caused by control system failure or operational errors.

[0017] Preferably, as an improvement, the motherboard is provided with an air passage block, which is connected to the air passage channel in the sealing block through an air pipe.

[0018] Technical benefits: This solution adopts the above setup, which connects the external gas source and each sealing block in a unified manner through the gas circuit block, making the complex multi-channel gas circuit management neat and orderly, reducing the risk of gas leakage; it also provides a convenient physical carrier for integrating gas valves, pressure regulators, flow meters and recovery interfaces.

[0019] Preferably, as an improvement, the motherboard has a sealing groove around its top edge, and the edge of the sealing groove has multiple guide holes.

[0020] Technical effect: The above-mentioned settings in this solution ensure a sealed connection between the vacuum chamber and the main board through the cooperation of the sealing groove and the sealing element. The guide hole provides a precise guiding path for the guide post, ensuring that the vacuum chamber and the main board can quickly and accurately dock and form a sealed environment.

[0021] Preferably, as an improvement, the bottom edge of the vacuum chamber is provided with a sealing element that mates with the sealing groove, and the edge of the sealing element is provided with a guide post that mates with the guide hole.

[0022] Technical effect: The above-mentioned configuration of this solution, with the guide column and guide hole cooperating, can automatically correct its position during the descent of the vacuum box, ensuring that the sealing element can accurately fall into the sealing groove and avoid poor sealing caused by misalignment.

[0023] Preferably, as an improvement, the lower mounting plate is provided with lower mounting plate handles on both sides, and the upper mounting plate is provided with upper mounting plate handles on both sides.

[0024] Technical benefits: The above-mentioned setup allows operators to easily disassemble and replace the lower and upper mounting plates by holding the handles, without the need for auxiliary devices, thus improving the overall utilization rate and ease of operation of the equipment. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0026] Figure 2 This is a structural schematic diagram from another perspective of an embodiment of the present utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the motherboard of this utility model.

[0028] Figure 4 This is a schematic diagram of the structure of the vacuum chamber of this utility model.

[0029] The reference numerals in the accompanying drawings include: base plate 1, top plate 2, support column 3, main plate 4, sealing groove 401, guide hole 402, lower mounting plate 5, lower mounting plate handle 501, limit block 6, leveling column 7, leveling limit column 8, sealing block 9, air passage block 10, vacuum box 11, connecting plate 1101, sealing element 1102, guide column 1103, upper mounting plate 12, upper mounting plate handle 1201, and clamping head 13. Detailed Implementation

[0030] The following detailed description illustrates the specific implementation method: Example The basics are as follows: Figure 1-4 As shown: A performance testing device for internal pores of a product includes a base plate 1 and a top plate 2, which are connected by a support column 3. A main plate 4 is mounted on the base plate 1, and a lower mounting plate 5 is detachably mounted on the main plate 4. The lower mounting plate 5 has multiple limiting blocks 6, multiple leveling columns 7, and sealing components. The limiting blocks 6 are arranged along the edge of the product to limit its movement and ensure it is in the correct position. The leveling columns 7 are flush with the horizontal plane at the bottom of the product to support it. The sealing blocks 9 seal the internal channels of the product, which are channels for water inside the product. The product has channels such as oil channels and air channels, which make the internal channels of the product form a sealed state. A vacuum box 11 with an opening facing downward is provided between the bottom plate 1 and the top plate 2. The bottom of the vacuum box 11 is provided with a connecting plate 1101 that is slidably connected to the support column 3. A driving component (not shown in the figure) for the vacuum box 11 to slide up and down along the support column 3 is connected to the side wall of the vacuum box 11. An upper mounting plate 12 is detachably provided at the top of the vacuum box 11. The upper mounting plate 12 is provided with a plurality of pressing heads 13 for pressing the product. The pressing heads 13 descend with the vacuum box 11 and press the product onto the lower mounting plate 5.

[0031] Driven by the drive unit, the vacuum chamber 11 descends along the support column 3 until the bottom of the vacuum chamber 11 is in contact with the top of the main board 4. At this time, the pressing head 13 presses the product, and a sealed space is formed between the vacuum chamber 11 and the main board 4. An air pump (not shown in the figure) is provided on the side wall of the vacuum chamber 11 to extract the air in the sealed space and form a vacuum environment.

[0032] The sealing assembly includes multiple sealing blocks 9, each with a different shape, arranged according to the position of the product's internal channels. Each sealing block 9 has a gas passage for venting into the product's internal channels, simultaneously sealing the internal channels and filling them with nitrogen. A sealing ring is provided on the side edge of the sealing block 9 that contacts the product, fitting snugly against the outer perimeter of the internal channel opening to prevent gas leakage during ventilation.

[0033] The mainboard 4 is equipped with a gas passage block 10, which is connected to the gas passage channel within the sealing block 9 via a gas pipe. The gas passage block 10 is also connected to external helium and nitrogen cylinders, allowing the high-pressure gas from either cylinder to pass through the gas passage block 10 before being injected into the product's internal channels via the sealing block 9. The gas passage block 10 contains gas valves for injecting helium and nitrogen into the product. It also includes a helium and nitrogen recovery mechanism for recovering the helium and nitrogen used in testing. The recovery mechanism separates the recovered helium and nitrogen, stores them separately, and reuses them.

[0034] Furthermore, a leak detector is installed inside the vacuum chamber 11 to detect whether helium gas is leaking.

[0035] The top of the equalizing column 7 is equipped with a protruding rubber block that fits against the bottom of the product, providing flexible support. At the same time, the lower mounting plate 5 is also equipped with multiple equalizing limit columns 8. When the pressing head 13 presses the product, the equalizing limit columns 8 limit the lowest position of the pressing head 13. That is, when the bottom of the product fits against the equalizing limit column 8, the pressing head 13 descends to its maximum displacement and stops descending, preventing the pressing head 13 from over-pressuring and damaging the workpiece.

[0036] The top edge of the motherboard 4 is provided with a sealing groove 401, and the edge of the sealing groove 401 is provided with multiple guide holes 402. The bottom edge of the vacuum box 11 is provided with a sealing element 1102 that mates with the sealing groove 401. The edge of the sealing element 1102 is provided with a guide post 1103 that mates with the guide hole 402. The guide post 1103 and the guide hole 402 work together to position the sealing element 1102 and the sealing groove 401 correctly. The two work together to seal the connection between the vacuum box 11 and the motherboard 4, ensuring the airtightness of the sealed space.

[0037] The lower mounting plate 5 has lower mounting plate handles 501 on both sides, and the upper mounting plate 12 has upper mounting plate handles 1201 on both sides, making it convenient for workers to replace different lower mounting plates 5 and upper mounting plates 12. The positions and quantities of the limiting blocks 6, equalizing columns 7, and sealing blocks 9 on different lower mounting plates 5 are different, and the positions and quantities of the clamping heads 13 on different upper mounting plates 12 are also different, making it convenient to match different products.

[0038] In actual use, the product is placed on the lower mounting plate 5, with the edges of the workpiece aligned with the multiple limiting blocks 6 to ensure the product is in the correct position. After placement, the product aligns with the leveling posts 7 on the lower mounting plate 5. Subsequently, the drive unit lowers the vacuum chamber 11 along the support column 3 until the bottom of the vacuum chamber 11 aligns with the main board 4. At this point, the pressing head 13 inside the vacuum chamber 11 aligns with the top of the product, pressing the product firmly onto the lower mounting plate 5. The multiple sealing blocks 9 completely align with the internal channel openings of the product, ensuring a complete seal. Simultaneously, the guide post 1103 engages with the guide hole 402, and the sealing element 1102 engages with the sealing groove 401, ensuring a sealed space is formed between the vacuum chamber 11 and the main board 4. Then, the vacuum pump is activated to extract the air from the sealed space, creating a vacuum environment. Next, the gas valve inside the gas passage block 10 is opened, and high-pressure helium is first injected into the internal channel of the product. The leak detector on the inner wall of the vacuum chamber 11 continuously monitors whether there is any helium leakage in the sealed space formed between the vacuum chamber 11 and the main board 4. If a helium leak is detected, the product is considered unqualified; if no helium is detected, the product is considered qualified. After the test is completed, the helium gas valve is closed, the gas recovery mechanism is activated, and then the nitrogen gas valve is opened, using high-pressure nitrogen to flush all the helium inside the product into the recovery mechanism. Finally, the drive unit lifts the vacuum chamber 11, and the tested product can be removed from the lower mounting plate 5.

[0039] After using helium for testing, nitrogen is then introduced to maximize helium recovery. Helium is more expensive than nitrogen, and effective helium recovery can significantly reduce testing costs.

[0040] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A performance testing device for internal pores of a product, comprising a base plate and a top plate, wherein the base plate and the top plate are connected by a support column, characterized in that: The base plate is equipped with a main board, on which a lower mounting plate is detachably mounted. The lower mounting plate is equipped with multiple limiting blocks, multiple leveling posts, and a sealing assembly. The multiple limiting blocks are arranged along the edge of the product, and the leveling posts are attached to the bottom of the product. The sealing assembly includes multiple sealing blocks that seal the internal channels of the product. A vacuum chamber with an opening facing downwards is provided between the base plate and the top plate. The bottom of the vacuum chamber is equipped with a connecting plate that is slidably connected to the support column. An upper mounting plate is detachably mounted on the top of the vacuum chamber, and the upper mounting plate is equipped with multiple pressing heads for pressing the product.

2. The performance testing device for internal pores of a product according to claim 1, characterized in that: The multiple sealing blocks are all different in shape and are arranged according to the position of the internal channel of the product. The sealing blocks are provided with air passages for air to be vented into the internal channel of the product.

3. The performance testing device for internal pores of a product according to claim 2, characterized in that: The sealing block has a sealing ring on the side edge that contacts the product.

4. The performance testing device for internal pores of a product according to claim 1, characterized in that: The top of the contour column is provided with a protruding rubber block.

5. The performance testing device for internal pores of a product according to claim 1, characterized in that: The lower mounting plate is also equipped with multiple height limit posts.

6. The performance testing device for internal pores of a product according to claim 1, characterized in that: The main board is equipped with an air passage block, which is connected to the air passage channel in the sealing block through an air pipe.

7. The performance testing device for internal pores of a product according to claim 6, characterized in that: The motherboard has a sealing groove around its top edge, and the edge of the sealing groove has multiple guide holes.

8. The performance testing device for internal pores of a product according to claim 7, characterized in that: The bottom edge of the vacuum chamber is provided with a sealing element that mates with the sealing groove, and the edge of the sealing element is provided with a guide post that mates with the guide hole.

9. The performance testing device for internal pores of a product according to claim 1, characterized in that: The lower mounting plate is provided with lower mounting plate handles on both sides, and the upper mounting plate is provided with upper mounting plate handles on both sides.

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