Air-tight sealing, positioning and pressing device and method
Patent Information
- Application Number
- CN202611141642.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-30
- Publication Date
- 2026-10-30
AI Technical Summary
[0004]本发明针对现有气密检测工装工序多、检测效率低的缺陷，提供一种气密封堵定位压持装置及方法，集成工件定位、上下端面同步封堵、气动压紧功能，简化检测工序，提升批量检测效率，降低生产制造成本
采用定位、压紧、上下端面封堵一体化设计，单次气动操作即可完成工件密封，减少操作工序，提升批量气密检测效率；
Smart Images
Figure CN123000680A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of airtightness testing technology, specifically to an airtightness plugging positioning and holding device and method. Background Technology
[0002] Precision product manufacturing is an important guarantee for driving product transformation and upgrading. Based on the structural characteristics of the product and the technical parameter requirements of the processed product, the manufacturing plant needs to customize or manufacture auxiliary airtightness testing equipment that is suitable for the processed product. Among them, the airtightness plugging positioning and holding device is indispensable.
[0003] Existing airtightness testing auxiliary devices have simple mechanisms but numerous processes, resulting in low production efficiency and high production costs. Therefore, it is necessary to improve and innovate existing airtightness testing devices to adapt to the mass production of airtightness testing products with different shapes and structures. Summary of the Invention
[0004] This invention addresses the shortcomings of existing airtightness testing fixtures, which involve numerous steps and low testing efficiency. It provides an airtightness plugging, positioning, and holding device and method that integrates workpiece positioning, simultaneous sealing of upper and lower end faces, and pneumatic clamping functions. This simplifies the testing process, improves batch testing efficiency, and reduces production costs.
[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A gas-tight plugging positioning and holding device, characterized in that it includes a plugging positioning connecting device and a linkage holding plugging device, wherein the linkage holding plugging device is arranged above and behind the center of the workpiece, and the plugging positioning connecting device is arranged below and behind the center of the workpiece. The linkage pressing and sealing device includes a sealing ring, a push rod, a guide mechanism, a bracket, a connecting rod, and a cylinder, and is used to complete the pressing and sealing of the workpiece and its end face; The sealing and positioning connection device includes a sealing gasket, a positioning component, and a base, which are used to achieve workpiece positioning, bottom sealing, and assembly connection of machine parts; The positioning component is fixed to the front end of the base, the sealing gasket is fitted into the slot at the upper part of the air inlet of the positioning component, the cylinder is fixedly installed at the rear end of the base, the upper end of the cylinder telescopic rod is hinged to the tail of the connecting rod, the guide mechanism is fixed to the middle of the base, the upper end of the guide mechanism is fixedly provided with a bracket, the middle part of the connecting rod and the bracket are hinged by a first hinge, the head of the connecting rod and the upper end of the top rod are hinged by a second hinge, the top rod slides vertically through the guide groove at the front of the guide mechanism, and the sealing ring is tightly installed at the center of the bottom end of the top rod.
[0006] Furthermore, the guiding mechanism includes a side plate and a guide block. The side plate is fixed vertically in the middle of the base, the guide block is arranged horizontally, the bottom of the rear end of the guide block is fixed to the upper end of the side plate, the bracket is fixed to the upper end of the guide block, and the front part of the guide block is provided with a guide groove for the top rod to pass through.
[0007] Furthermore, the side plate has a convex-shaped structure, and the side plate includes a side plate body and side plate positioning blocks protruding on the left and right sides of the lower part of the side plate body. The side plate positioning blocks are provided with through holes along the vertical direction, and screws are screwed into the through holes of the side plate positioning blocks from the top to cooperate with the screw holes of the base for positioning.
[0008] Furthermore, the rear part of the guide block is provided with a through hole in the vertical direction, and a screw is screwed into the through hole of the guide block from the top to cooperate with the screw hole at the upper end of the side plate for positioning.
[0009] Furthermore, a connecting block is fixedly provided at the upper end of the cylinder telescopic rod, and the head of the connecting block and the tail of the connecting rod are hinged together.
[0010] Furthermore, the bracket includes a bracket base plate and two ear plates, which are symmetrically fixed to the bracket base plate. The lower end of the first hinge extends into the gap between the two ear plates and is horizontally connected by a pin.
[0011] A gas-tight plugging positioning and holding method, implemented using the aforementioned gas-tight plugging positioning and holding device, includes the following steps: the cylinder uses compressed air as a power source; when the telescopic rod of the cylinder retracts, the push rod rises to avoid the workpiece; when the cylinder extends, the push rod presses down to press the bottom sealing ring against the upper end face of the workpiece; the lower end of the workpiece presses against the sealing gasket on the positioning component, thereby forming a sealed detection chamber inside the workpiece; the side of the positioning component is provided with an air inlet; detection gas is introduced into the sealed detection chamber through the air inlet hole of the positioning component and the central through hole of the sealing gasket to complete the gas tightness detection.
[0012] Compared with the prior art, the present invention has the following advantages: It adopts an integrated design of positioning, clamping and upper and lower end face sealing, and the workpiece sealing can be completed in a single pneumatic operation, reducing operation steps and improving the efficiency of batch airtightness testing; The pneumatic linkage structure provides stable transmission, uniform clamping force, and reliable sealing effect, making it suitable for various shaped workpieces such as aluminum die casting, pouring, and powder metallurgy. It adopts a modular and split structure, making it easy to disassemble and assemble parts, and easy to replace gaskets and sealing rings, resulting in low maintenance costs. With its compact and small structure, it occupies little production line space, is compatible with automated production lines, and reduces the production and testing costs per workpiece. Attached Figure Description
[0013] Figure 1 This is a front view of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a disassembled structural diagram of the present invention; Figure Labels 1. Base, 2. Positioning component, 3. Cylinder, 4. Sealing gasket, 5. Workpiece, 6. Connecting block. 7 Side plate, 8 Sealing ring, 9 Top rod, 10 Guide block, 11 Bracket 12 First hinge, 13 Linkage, 14 Second hinge 701 Side panel main body, 702 Side panel positioning block, 1101 Base plate, 1102 Ear plate. Detailed Implementation
[0014] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0015] This embodiment proposes an airtight plugging positioning and holding device, including a plugging positioning connecting device and a linkage holding plugging device. The linkage holding plugging device is arranged above and behind the center of the workpiece 5, and the plugging positioning connecting device is arranged below and behind the center of the workpiece 5.
[0016] like Figure 1 and Figure 2 As shown, the linkage pressing and sealing device includes a sealing ring 8, a push rod 9, a bracket 11, a connecting rod 13 and a cylinder 3, which are used to press and seal the end face of the workpiece 5; a connecting block 6 is fixedly provided at the upper end of the telescopic rod of the cylinder 3, and the head of the connecting block 6 and the tail of the connecting rod 13 are hinged.
[0017] The sealing and positioning connection device includes a sealing gasket 4, a positioning component 2, a base 1, and a guide mechanism, which are used to achieve the positioning of the workpiece 5, bottom sealing, and assembly connection of the whole machine parts; the positioning component 2 is fixed at the front end of the base 1, the sealing gasket 4 is snapped into the slot at the upper part of the air inlet of the positioning component 2, the cylinder 3 is fixedly installed at the rear end of the base 1 by screws at the four corners, and the guide mechanism is fixed in the middle of the base 1.
[0018] The guiding mechanism includes a side plate 7 and a guide block 10. The side plate 7 is fixed vertically in the middle of the base 1. The side plate 7 has a convex structure. The side plate 7 includes a side plate body 701 and side plate positioning blocks 702 protruding from the lower left and right sides of the side plate body 701. The side plate positioning blocks 702 have through holes vertically. Screws are screwed into the through holes of the side plate positioning blocks 702 from the top to cooperate with the screw holes of the base 1 for positioning.
[0019] The guide block 10 is set in the horizontal direction. The rear part of the guide block 10 has a through hole that runs vertically through it. The through hole of the guide block 10 is screwed in from the top and is positioned to cooperate with the screw hole at the upper end of the side plate 7. The front part of the guide block 10 has a guide groove for the top rod 9 to pass through. The sealing ring 8 is clamped and installed at the center of the bottom end of the top rod 9.
[0020] like Figure 2 and Figure 3 As shown, a bracket 11 is fixedly provided at the upper end of the guide block 10. The bracket 11 includes a bracket base plate 1101 and two ear plates 1102. The ear plates 1102 are symmetrically fixed on the bracket base plate 1101. The lower end of the first hinge 12 extends into the gap between the two ear plates 1102 and is horizontally connected by a pin. The head of the connecting rod 13 and the upper end of the top rod 9 are hinged by the second hinge 14.
[0021] See Figure 3 The assembly method of the gas-tight plug positioning and holding device in this embodiment is as follows: The base 1 serves as the foundation for the entire machine. The positioning component 2 is fixed to the front end of the base 1 with screws. The sealing gasket 4 is inserted into the slot above the central air inlet of the positioning component 2. The side plate 7 is installed in the middle of the base 1 and on the back side of the positioning component 2 with screws. The cylinder 3 is fixed at the rear end of the base 1 and on the back side of the side plate 7. The bottom surface of the rear end of the guide block 10 is attached to the plane of the upper end of the side plate 7, and the guide block 10 and the side plate 7 are fixedly connected by screws. The bracket 11 is fixed in the middle position of the upper end of the guide block 10 by screws. A connecting block 6 is fixedly assembled at the upper end of the telescopic rod of cylinder 3, and the head of the connecting block 6 is hinged to the tail of the connecting rod 13 by a pin. The upper ends of the first hinge 12 and the second hinge 14 are respectively hinged to the middle section and the head of the connecting rod 13 by pins. The lower end of the first hinge 12 is hinged to the two ear plates 1102 of the bracket 11 by pins. The lower end of the second hinge 14 is hinged to the upper end of the connecting top rod 9 by pins. Insert the top rod 9 vertically into the guide groove inside the guide block 10, and clamp the sealing ring 8 tightly to the center of the bottom end of the top rod 9 to complete the overall assembly of the device.
[0022] A method for positioning and holding an airtight plug is implemented using the airtight plug positioning and holding device assembled as described above. (See attached image) Figure 1 and Figure 3 This includes the following steps: Step 1) Connect the air tightness testing equipment connector to the air inlet on the side of the positioning component 2, and connect the air pipe to the pneumatic interface of the cylinder 3; Step 2) Activate the pneumatic switch. The cylinder 3 telescopic rod retracts downward. The hinge linkage mechanism composed of connecting block 6, connecting rod 13, hinge 12, bracket 11, and push rod 9 rotates counterclockwise, causing push rod 9 to rise upward along the guide groove inside guide block 10. The upper end face of the airtightness testing auxiliary tooling opens. Step 3) Place the workpiece 5 to be inspected into the central slot of the positioning component 2 to complete the initial positioning; Step 4) Restart the pneumatic switch. The cylinder 3 extension rod pushes upward, driving the hinge linkage mechanism to rotate clockwise, causing the push rod 9 to slide downward. The sealing ring 8 at the bottom of the push rod 9 tightly fits the upper end face of the workpiece 5. The push rod 9 presses down, causing the lower end of the workpiece 5 to press against the sealing gasket 4 on the positioning piece 2, forming a sealed detection chamber inside the workpiece 5. Step 5) Turn on the air tightness testing equipment and detect the gas flowing in through the air inlet on the side of the positioning part 2, passing through the central through hole of the sealing gasket 4 and entering the sealing cavity of the workpiece 5. The air tightness testing equipment performs air tightness leak detection. Step 6) After the test is completed, first turn off the air tightness test equipment, then control the cylinder 3 telescopic rod to retract downwards, and the top rod 9 to lift up again to open the upper end face of the air tightness test aid. Take out the workpiece 5 that has been tested, and the single test process ends. The next workpiece 5 can be tested in a loop.
[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A gas-tight plug positioning and holding device, characterized in that, It includes a sealing and positioning connection device and a linkage pressing and sealing device. The linkage pressing and sealing device is arranged above and behind the center of the workpiece (5), and the sealing and positioning connection device is arranged below and behind the center of the workpiece (5). The linkage pressing and sealing device includes a sealing ring (8), a push rod (9), a guide mechanism, a bracket (11), a connecting rod (13) and a cylinder (3), which are used to press and seal the end face of the workpiece (5); The sealing and positioning connection device includes a sealing gasket (4), a positioning component (2) and a base (1), which are used to realize the positioning of the workpiece (5), bottom sealing and assembly connection of the whole machine parts; The positioning component (2) is fixed at the front end of the base (1), the sealing gasket (4) is fitted into the slot at the upper part of the air inlet of the positioning component (2), the cylinder (3) is fixedly installed at the rear end of the base (1), the upper end of the telescopic rod of the cylinder (3) is hinged to the tail of the connecting rod (13), the guide mechanism is fixed in the middle of the base (1), the upper end of the guide mechanism is fixedly provided with a bracket (11), the middle part of the connecting rod (13) and the bracket (11) are hinged through the first hinge (12), the head of the connecting rod (13) and the upper end of the top rod (9) are hinged through the second hinge (14), the top rod (9) slides vertically through the guide groove at the front of the guide mechanism, and the sealing ring (8) is clamped and installed at the center of the bottom end of the top rod (9).
2. The airtight plug positioning and holding device according to claim 1, characterized in that, The guiding mechanism includes a side plate (7) and a guide block (10). The side plate (7) is fixed vertically in the middle of the base (1). The guide block (10) is set horizontally. The bottom of the rear end of the guide block (10) is fixed to the upper end of the side plate (7). The bracket (11) is fixed to the upper end of the guide block (10). The front part of the guide block (10) is provided with a guide groove for the top rod (9) to pass through.
3. The airtight plug positioning and holding device according to claim 2, characterized in that, The side plate (7) has a convex shape. The side plate (7) includes a side plate body (701) and side plate positioning blocks (702) protruding on the left and right sides of the lower part of the side plate body (701). The side plate positioning blocks (702) have through holes along the vertical direction. Screws are screwed into the through holes of the side plate positioning blocks (702) from the top to cooperate with the screw holes of the base (1) for positioning.
4. The airtight plug positioning and holding device according to claim 3, characterized in that, The guide block (10) has a through hole running vertically through its rear part. A screw is screwed into the through hole of the guide block (10) from above to cooperate with the screw hole at the upper end of the side plate (7) for positioning.
5. The airtight plug positioning and holding device according to claim 1, characterized in that, The upper end of the telescopic rod of the cylinder (3) is fixedly provided with a connecting block (6), and the head of the connecting block (6) and the tail of the connecting rod (13) are hinged together.
6. The airtight plug positioning and holding device according to claim 1, characterized in that, The bracket (11) includes a bracket base plate (1101) and two ear plates (1102). The ear plates (1102) are symmetrically fixed on the bracket base plate (1101). The lower end of the first hinge (12) extends into the gap between the two ear plates (1102) and is horizontally connected by a pin.
7. A method for positioning and holding an airtight plug, characterized in that, The airtight plugging and positioning device according to claim 1 is implemented by the following steps: the cylinder (3) uses compressed air as a power source. When the telescopic rod of the cylinder (3) retracts, the push rod (9) is raised to avoid the workpiece (5). When the cylinder (3) extends, the push rod (9) is pressed down to make the bottom sealing ring (8) press against the upper end face of the workpiece (5). The lower end of the workpiece (5) presses against the sealing gasket (4) on the positioning part (2) so that a sealed detection chamber is formed inside the workpiece (5). The side of the positioning part (2) is provided with an air inlet. The detection gas enters the sealed detection chamber through the air inlet of the positioning part (2) and the central through hole of the sealing gasket (4) to complete the airtightness detection.