Air detection leak in a generator interplate
By fully sealing the air leak detection machine of the generator intermediate plate and combining it with air pressure testing, the problem of detecting leakage channels during the casting process of the generator intermediate plate was solved, and efficient and accurate air tightness testing was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG WENCAN DIE CASTING TECH CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-07
Smart Images
Figure CN224471218U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive parts manufacturing, and in particular to a gas leak detection machine for generator intermediate plates. Background Technology
[0002] As a key component connecting and separating different cavities, the sealing performance of the generator intermediate plate directly affects the safe operation and service life of the generator.
[0003] Since generator intermediate plates are mainly formed by die casting, defects such as porosity, sand holes, shrinkage cavities, and cracks may occur during the production process (such as casting and cooling). These defects may cause leakage channels to form between the internal flow channels and the outside. In order to ensure that there are no manufacturing defects and that only good products are supplied to external parties, it is necessary to develop a gas leak detection machine for generator intermediate plates to test the airtightness of the internal flow channels of the completed intermediate plates.
[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content
[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an air leak detection machine for generator intermediate plates, which aims to test the air tightness of the internal flow channels of generator intermediate plates.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A leak detection machine for a generator intermediate plate includes a workbench, a stand on the workbench, a tooling base plate on the workbench, multiple positioning pins on the tooling base plate, a first side-blocking structure on the tooling base plate, and an air inlet on the tooling base plate. A lifting plate is located above the tooling base plate, and multiple clamping devices, a vertical blocking structure, and a second side-blocking structure are located at the bottom of the lifting plate. The stand is equipped with a lifting drive cylinder that connects downwards to the top of the lifting plate. The positioning pins are used to position the workpiece, and the clamping devices press the workpiece downwards. The first and second side-blocking structures are used to block the large side holes of the workpiece, and the vertical blocking structure is used to block the upper hole and top notch of the workpiece. An air passage communicating with the air inlet is provided inside the tooling base plate, and the air passage is connected to a pressure detection mechanism.
[0008] As a further improvement to the above technical solution, the first side plug structure includes a first cylinder fixed on the tooling base plate and facing the workpiece with a side hole, and a first plug disposed on the output end of the first cylinder.
[0009] As a further improvement to the above technical solution, the second side plug structure includes a bracket set on the bottom surface of the lifting plate, a second cylinder mounted on the bracket and facing one of the large side holes of the workpiece, and a second plug set on the output end of the second cylinder.
[0010] As a further improvement to the above technical solution, the clamping device includes a first guide sleeve, a first spring, and a first pressure rod. The first guide sleeve is disposed on the bottom surface of the lifting plate. The upper part of the first pressure rod is slidably disposed inside the first guide sleeve. A first abutting part is provided in the middle of the first pressure rod. The first spring is sleeved on the first pressure rod. The lower end of the first spring abuts against the first abutting part, and the upper end of the first spring abuts against the lower end of the first guide sleeve. A pressure head for pressing the workpiece is provided at the bottom end of the first pressure rod.
[0011] As a further improvement to the above technical solution, the vertical plug structure includes a second guide sleeve, a second spring, a second pressure rod, and a third plug. The second guide sleeve is disposed on the bottom surface of the lifting plate. The upper part of the second pressure rod is slidably disposed inside the second guide sleeve. A second abutment part is provided in the middle of the second pressure rod. The second spring is sleeved on the second pressure rod. The lower end of the second spring abuts against the second abutment part, and the upper end of the second spring abuts against the lower end of the second guide sleeve. A third plug is provided at the bottom end of the second pressure rod. The third plug is used to block the upper hole of the workpiece.
[0012] As a further improvement to the above technical solution, the vertical plug structure also includes a bracket set on the bottom surface of the lifting plate, a third cylinder mounted obliquely on the bracket and facing the top notch of the workpiece, and a plug set on the output end of the third cylinder.
[0013] As a further improvement to the above technical solution, the tooling base plate is provided with a first sensor for detecting whether a workpiece is placed on it and a second sensor for detecting whether the workpiece is placed correctly.
[0014] As a further improvement to the above technical solution, the tooling base plate is provided with an anti-reverse mounting block.
[0015] As a further improvement to the above technical solution, a qualified marking gun is provided on the workbench.
[0016] As a further improvement to the above technical solution, the workbench is provided with a lower limit post, and the bottom surface of the lifting plate is provided with an upper limit post that is vertically facing the lower limit post.
[0017] The beneficial effects of this utility model are as follows: The gas leak detection machine provided by this utility model takes into account the characteristics of the generator intermediate plate, such as the built-in flow channel structure, the small side holes and large side holes on the side, and the top hole and top notch. It is equipped with a first side blocking structure, a second side blocking structure, and a vertical blocking structure to block the small side holes, large side holes, top notch, and top hole of the workpiece, respectively. This achieves a complete seal of the internal flow channel of the generator intermediate plate, ensuring that the detection gas can only flow in the internal flow channel and will not leak from other holes. This enables comprehensive detection of whether there is a leakage problem in various parts of the generator intermediate plate, thus improving the reliability of the detection. Attached Figure Description
[0018] Figure 1 A perspective view of the gas leak detector provided by this utility model.
[0019] Figure 2 A perspective view showing multiple clamps, a vertical blocking structure, and a second side blocking structure arranged on a lifting plate.
[0020] Figure 3 This is a 3D view of the generator intermediate plate installed on the gas leak detector.
[0021] Figure 4 This is a 3D view of the generator's intermediate plate.
[0022] Key component symbols: 11-Workbench, 12-Upright frame, 13-Tooling base plate, 14-Lifting plate, 15-Lifting drive cylinder, 2-Positioning pin, 3-First side plug structure, 31-First cylinder, 32-First plug, 4-Air inlet head, 5-Pressure clamp, 51-First guide sleeve, 52-First spring, 53-First pressure rod, 54-Pressure head, 6-Vertical plug structure, 61-Second guide sleeve, 62-Second spring, 63-Second pressure rod 64-Third plug, 65-Third cylinder, 66-Plug, 7-Second side plug structure, 71-Bracket, 72-Second cylinder, 73-Second plug, 81-First sensor, 82-Second sensor, 83-Anti-reverse block, 84-Qualified marking gun, 85-Lower limit post, 86-Upper limit post, 87-Scanner, 9-Generator intermediate plate, 91-Side small hole, 92-Side large hole, 93-Upper hole, 94-Top notch, 95-Bottom hole. Detailed Implementation
[0023] This utility model provides a gas leak detection device for a generator intermediate plate 9. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.
[0024] Please see Figures 1 to 4This utility model provides a leak detection machine for a generator intermediate plate 9, including a workbench 11, a stand 12 mounted on the workbench 11, a tooling base plate 13 mounted on the workbench 11, multiple positioning pins 2 mounted on the tooling base plate 13, a first side blocking structure 3 mounted on the tooling base plate 13, and an air inlet head 4 mounted on the tooling base plate 13. A lifting plate 14 is provided above the tooling base plate 13, and multiple clamping devices 5, a vertical blocking structure 6, and a second side blocking structure 7 are provided at the bottom of the lifting plate 14. The stand 12 is provided with a lifting drive cylinder 15 that is connected downward to the top of the lifting plate 14. The positioning pins 2 are used to position the workpiece and the clamping devices 5 press the workpiece downward. The first side blocking structure 3 and the second side blocking structure 7 are used to block the side large hole 92 of the workpiece. The vertical blocking structure 6 is used to block the upper hole 93 and the top notch 94 of the workpiece (i.e., the generator intermediate plate 9). An air passage communicating with the air inlet head 4 is provided in the tooling base plate 13, and the air passage is connected to the air pressure detection mechanism.
[0025] When an airtightness test is required on the generator intermediate plate 9, the cast workpiece is first placed on the fixture base plate 13. Multiple locating pins 2 on the fixture base plate 13 are used to precisely position the workpiece, ensuring it is in the correct testing position and that the bottom hole 95 of the workpiece seals with the air inlet head 4. After positioning, the lifting drive cylinder 15 on the upright frame 12 is activated, driving the lifting plate 14 downwards. Multiple clamps 5 at the bottom of the lifting plate 14 then press down on the workpiece, firmly fixing it on the fixture base plate 13 and preventing displacement during the testing process.
[0026] At this time, the first side-blocking structure 3 on the tooling base plate 13 and the second side-blocking structure 7 at the bottom of the lifting plate 14 respectively block the small side hole 91 and the large side hole 92 of the workpiece; the vertical blocking structure 6 at the bottom of the lifting plate 14 blocks the upper hole 93 of the workpiece, thereby sealing the internal flow channel of the generator intermediate plate 9 to form a relatively independent space. Next, the air pressure detection mechanism delivers gas to the air passage, and then enters the sealed internal flow channel of the intermediate plate through the air inlet head 4. The air pressure detection mechanism can monitor the changes in gas pressure entering the internal flow channel of the generator intermediate plate in real time. If the generator intermediate plate 9 does not have defects such as pores, sand holes, shrinkage cavities, cracks, etc., and the internal flow channel is well sealed, the air pressure will remain stable; if there are defects forming a leakage channel, the gas will leak through the leakage channel, causing the air pressure to drop. By detecting the changes in air pressure, the air pressure detection mechanism can determine whether there is a leakage problem in the intermediate plate and complete the airtightness test of the generator intermediate plate 9.
[0027] This utility model provides a gas leak detection machine that addresses the characteristics of the generator intermediate plate 9, including its internal flow channel structure, side small holes 91 and side large holes 92, and top hole 93 and top notch 94. It employs a first side-blocking structure 3, a second side-blocking structure 7, and a vertical blocking structure 6 to block the side small holes 91, side large holes 92, top notch 94, and top hole 93 of the workpiece. This achieves comprehensive sealing of the internal flow channels of the generator intermediate plate 9, ensuring that the detection gas can only flow within the internal channels and will not leak from other openings. This allows for comprehensive detection of leaks in all parts of the generator intermediate plate 9, improving the reliability of the detection. Furthermore, the workpiece is positioned using a positioning pin 2, and the clamping device 5 at the bottom of the lifting plate 14 presses the workpiece downwards, ensuring that the workpiece remains fixed during the detection process. This prevents workpiece movement from affecting the detection results and guarantees the stability and accuracy of the detection.
[0028] Specifically, the first side-blocking structure 3 includes a first cylinder 31 fixed on the tooling base plate 13 and facing the workpiece side hole 91, and a first plug 32 disposed on the output end of the first cylinder 31. Under the drive of the cylinder, the first plug 32 at the output end of the first cylinder 31 can form a tight seal on the workpiece side hole 91.
[0029] Specifically, the second side-blocking structure 7 includes a bracket 71 mounted on the bottom surface of the lifting plate 14, a second cylinder 72 mounted on the bracket 71 and facing one of the large side holes 92 of the workpiece, and a second plug 73 mounted on the output end of the second cylinder 72. For the large side hole 92 of the workpiece, the second plug 73 at the output end of the second cylinder 72, driven by the cylinder, can provide sufficient pressure to tightly block the large hole. Since the leakage risk of the large hole is relatively greater, the structural design of the second plug 73 and the power output of the second cylinder 72 can effectively prevent the detection gas from leaking from the large side hole 92, ensuring a highly sealed detection environment within the internal flow channel of the generator intermediate plate 9. This is particularly suitable for detecting generator intermediate plates 9 with strict requirements for the sealing of large-diameter holes, significantly improving the accuracy of airtightness testing.
[0030] For details, see Figure 2 As shown, the clamping device 5 includes a first guide sleeve 51, a first spring 52, and a first pressure rod 53. The first guide sleeve 51 is disposed on the bottom surface of the lifting plate 14. The upper part of the first pressure rod 53 is slidably disposed inside the first guide sleeve 51. A first abutting part is provided in the middle of the first pressure rod 53. The first spring 52 is sleeved on the first pressure rod 53. The lower end of the first spring 52 abuts against the first abutting part, and the upper end of the first spring 52 abuts against the lower end of the first guide sleeve 51. A pressure head 54 for pressing the workpiece is provided at the bottom end of the first pressure rod 53.
[0031] In the initial state (i.e., before the generator intermediate plate 9 is pressed), the first spring 52 is in a naturally extended state, the upper part of the first pressure rod 53 is located inside the guide sleeve, and the pressure head 54 is a certain distance from the top of the generator intermediate plate 9. When the lifting drive cylinder 15 is activated and pushes the lifting plate 14 downward, the lifting plate 14 drives the first guide sleeve 51 and the first pressure rod 53 connected to it to move downward together. As the first pressure rod 53 gradually approaches the top of the generator intermediate plate 9, the bottom end of the first pressure rod 53 first contacts the top of the generator intermediate plate 9. The continued downward pressure causes the first pressure rod 53 to slide upward relative to the first guide sleeve 51. At this time, the abutting part in the middle of the first pressure rod 53 will compress the first spring 52. The first spring 52 will generate a reverse elastic force during the compression process. This elastic force acts on the top of the generator intermediate plate 9 through the first pressure rod 53, so that the pressure of the first pressure rod 53 on the generator intermediate plate 9 comes from both the initial pressure pushed by the cylinder and the elastic pressure of the first spring 52. When a certain degree of compression is reached, the lifting drive cylinder 15 stops moving. At this time, the first pressure rod 53, under the combined action of the elastic force of the first spring 52 and the thrust of the cylinder, stably presses the top of the generator intermediate plate 9. The presence of the first spring 52 can play a role in buffering and adaptive adjustment. If there is unevenness or height difference at the top of the generator intermediate plate 9, the first spring 52 can adapt to this situation through its own compression deformation, ensuring that each first pressure bar 53 and pressure head 54 can apply pressure to the generator intermediate plate 9 evenly, creating stable conditions for airtightness testing.
[0032] See Figure 2 As shown, the vertical blocking structure 6 includes a second guide sleeve 61, a second spring 62, a second pressure rod 63, and a third plug 64. The second guide sleeve 61 is disposed on the bottom surface of the lifting plate 14. The upper part of the second pressure rod 63 is slidably disposed inside the second guide sleeve 61. A second abutment part is provided in the middle of the second pressure rod 63. The second spring 62 is sleeved on the second pressure rod 63. The lower end of the second spring 62 abuts against the second abutment part, and the upper end of the second spring 62 abuts against the lower end of the second guide sleeve 61. A third plug 64 is provided at the bottom end of the second pressure rod 63. The third plug 64 is used to block the upper hole 93 of the workpiece.
[0033] When the lifting drive cylinder 15 drives the lifting plate 14 to move downward, the second guide sleeve 61, located on the bottom surface of the lifting plate 14, descends accordingly. The upper part of the second pressure rod 63 can slide within the second guide sleeve 61. During the descent, the third plug 64 at the bottom end of the second pressure rod 63 contacts the upper hole 93 of the workpiece first. As the lifting plate 14 continues to descend, the workpiece generates an upward reaction force on the third plug 64, pushing the second pressure rod 63 to slide upward within the second guide sleeve 61. At this time, the second spring 62 fitted on the second pressure rod 63 is compressed.
[0034] The second spring 62 is compressed to generate elastic force, which acts on the second pressure rod 63 through the second abutment part, ensuring that the third plug 64 is always tightly fitted against the upper hole 93 of the workpiece with a certain pressure, thus effectively blocking the upper hole 93. During the airtightness test, this pressure ensures that the upper hole 93 is well sealed, preventing gas leakage. Together with other plugging structures, it completes the sealing of the internal flow channel of the generator intermediate plate 9, so that the air pressure testing mechanism can accurately detect whether there is a leakage problem.
[0035] The vertical plug structure 6 also includes a bracket 71 mounted on the bottom surface of the lifting plate 14, a third cylinder 65 inclinedly mounted on the bracket 71 and facing the top notch 94 of the workpiece, and a plug 66 mounted on the output end of the third cylinder 65. The third cylinder 65 drives the plug 66 to automatically plug the top notch 94 of the workpiece, completing the sealing work synchronously with other plugs, which greatly shortens the preparation time before inspection and speeds up the inspection process. Specifically, it is designed to plug the top notch 94 of the workpiece, effectively filling the blind spot in the detection of leakage that may exist in the notch area in the previous inspection process.
[0036] If the workpiece is placed crookedly, when the lifting drive cylinder 15 drives the lifting plate 14 to descend, the contact positions of components such as the plug and clamp 5 with the workpiece will shift, easily causing a hard collision between the components. Therefore, the tooling base plate 13 is equipped with a first sensor 81 for detecting whether a workpiece is placed and a second sensor 82 for detecting whether the workpiece is placed correctly. The first sensor 81 and the second sensor 82 monitor the workpiece placement status in real time. Once a crooked workpiece is detected, a signal is immediately sent to the control system to prevent the lifting drive cylinder 15 from operating, thus preventing the lifting plate 14 from descending. This prevents components such as the plug, clamp 5, and positioning pin 2 from deforming or breaking due to uneven force, and also prevents damage to the cylinder due to abnormal load, significantly reducing equipment maintenance costs and downtime.
[0037] To prevent workers from installing workpieces backwards, the fixture base plate 13 is equipped with anti-reverse installation blocks 83. These blocks, through their unique shape and position design, form a physical barrier, ensuring that workpieces can only be placed on the fixture base plate 13 in the correct orientation. This eliminates the possibility of workpieces being installed backwards at the source, ensuring that each inspection accurately reflects the true airtightness of the intermediate plate and effectively improving inspection effectiveness.
[0038] Preferably, the workbench 11 is equipped with a qualification marking gun 84. After the airtightness test is completed on the generator intermediate plate 9, the qualification marking gun 84 can quickly mark a specific mark on the surface of the qualified workpiece, which allows qualified and unqualified workpieces to be quickly distinguished on the production line.
[0039] Preferably, the worktable 11 is provided with a lower limit post 85, and the bottom surface of the lifting plate 14 is provided with an upper limit post 86 that is vertically aligned with the lower limit post 85. When the lifting drive cylinder 15 drives the lifting plate 14 to descend, when the upper limit post 86 contacts the lower limit post 85, it indicates that the lifting plate 14 has reached the preset lowest position. At this time, components such as the plug and clamping device 5 can seal and clamp the workpiece with accurate force and position, ensuring the precision of the cooperation of each component during the airtightness test, avoiding the impact of excessive or insufficient lifting on the accuracy of the test results, thereby effectively ensuring the test accuracy.
[0040] In fact, in order to systematically track and monitor each workpiece, each workpiece is labeled, and the bottom of the lifting plate is equipped with a scanner 87 for scanning the label. The scanner 87 feeds the information back to the control system.
[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0043] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.
Claims
1. A leak detection machine for a generator intermediate plate, characterized in that, The device includes a workbench, a stand mounted on the workbench, a fixture base plate mounted on the workbench, multiple positioning pins mounted on the fixture base plate, a first side-blocking structure mounted on the fixture base plate, and an air inlet mounted on the fixture base plate. A lifting plate is located above the fixture base plate, and multiple clamping devices, a vertical blocking structure, and a second side-blocking structure are located at the bottom of the lifting plate. The stand is equipped with a lifting drive cylinder that connects downwards to the top of the lifting plate. The positioning pins are used to position the workpiece, and the clamping devices press the workpiece downwards. The first and second side-blocking structures are used to block the large side holes of the workpiece, and the vertical blocking structure is used to block the upper hole and top notch of the workpiece. An air passage communicating with the air inlet is located within the fixture base plate, and the air passage is connected to an air pressure detection mechanism.
2. The air leak detection machine for the generator intermediate plate according to claim 1, characterized in that, The first side plug structure includes a first cylinder fixed on the tooling base plate and facing the workpiece with a side hole, and a first plug disposed on the output end of the first cylinder.
3. The air leak detection machine for the generator intermediate plate according to claim 1, characterized in that, The second side-blocking structure includes a bracket set on the bottom surface of the lifting plate, a second cylinder mounted on the bracket and facing one of the large side holes of the workpiece, and a second plug set on the output end of the second cylinder.
4. The air leak detection machine for the generator intermediate plate according to claim 1, characterized in that, The clamping device includes a first guide sleeve, a first spring, and a first pressure rod. The first guide sleeve is disposed on the bottom surface of the lifting plate. The upper part of the first pressure rod is slidably disposed inside the first guide sleeve. A first abutting part is provided in the middle of the first pressure rod. The first spring is sleeved on the first pressure rod. The lower end of the first spring abuts against the first abutting part, and the upper end of the first spring abuts against the lower end of the first guide sleeve. A pressure head for pressing the workpiece is provided at the bottom end of the first pressure rod.
5. The air leak detection machine for the generator intermediate plate according to claim 1, characterized in that, The vertical plug structure includes a second guide sleeve, a second spring, a second pressure rod, and a third plug. The second guide sleeve is disposed on the bottom surface of the lifting plate. The upper part of the second pressure rod is slidably disposed inside the second guide sleeve. A second abutment part is provided in the middle of the second pressure rod. The second spring is sleeved on the second pressure rod. The lower end of the second spring abuts against the second abutment part, and the upper end of the second spring abuts against the lower end of the second guide sleeve. A third plug is provided at the bottom end of the second pressure rod. The third plug is used to block the upper hole of the workpiece.
6. The air leak detection machine for the generator intermediate plate according to claim 5, characterized in that, The vertical plug structure also includes a bracket set on the bottom surface of the lifting plate, a third cylinder mounted obliquely on the bracket and facing the top notch of the workpiece, and a plug set on the output end of the third cylinder.
7. The air leak detection machine for the generator intermediate plate according to claim 1, characterized in that, The tooling base plate is equipped with a first sensor for detecting whether a workpiece is placed on it and a second sensor for detecting whether the workpiece is placed correctly.
8. The air leak detection machine for the generator intermediate plate according to claim 1, characterized in that, The tooling base plate is equipped with anti-reverse mounting blocks.
9. The air leak detection machine for the generator intermediate plate according to claim 1, characterized in that, The workbench is equipped with a qualified javelin.
10. The air leak detection machine for the generator intermediate plate according to claim 1, characterized in that, The workbench is provided with a lower limit post, and the bottom surface of the lifting plate is provided with an upper limit post that is vertically facing the lower limit post.