Flexible butt joint tool for back-pulling airtight detection belt

Abstract

The invention provides a flexible butt joint tool for a back-pulling airtight detection belt, and belongs to the field of machine tools. The problems that an existing tool cannot achieve high-precision butt joint, airtight detection and flexible buffering functions easily, and workpiece clamping deflection or detection failure is likely to be caused are solved. The backward-pulling airtight detection flexible butt joint tool comprises a box body, a driving unit and a tool body, the output end of the driving unit is provided with a rotating shaft and a pull rod, the tool body comprises a positioning disc, a tool cylinder, a reference piece and a spring clamping cylinder, the front end of the spring clamping cylinder is provided with a plurality of pressing blocks and sealing rings, the front end of the reference piece is provided with a reference hole and a plurality of equally-divided holes, and the pressing blocks are arranged on the box body. The bottom of the reference hole forms a workpiece reference surface, the equally-divided hole is of a T-shaped structure and is communicated with the outside of the reference piece, the rear end of the reference piece is connected with a movable piece, the movable piece is movably connected with the pull rod, an elastic piece is arranged between the movable piece and the pull rod, a plurality of guide columns are arranged on the movable piece, a plurality of stepped holes are formed in the reference piece, and limiting parts are arranged at the front ends of the guide columns. The method has the advantage of high-precision detection.

Description

Technical Field

[0001] The invention belongs to the field of machine tools and relates to an airtightness detection tool, in particular to a flexible docking tool for a back-pull airtightness detection belt. Background Art

[0002] Precision parts machining requires multi-spindle collaborative machining and airtightness testing. Existing tooling struggles to balance high-precision docking, airtightness testing, and flexible buffering, which can easily lead to workpiece clamping misalignment or test failure. Summary of the Invention

[0003] The purpose of the present invention is to provide a flexible docking tool for a rear-pull airtight detection belt to solve the above problems in the prior art.

[0004] The object of the present invention can be achieved by the following technical solutions: A flexible docking tool for a rear-pull airtightness detection belt, comprising a box, a drive unit and a tool body; The output end of the drive unit is provided with a coaxially arranged rotating shaft and a pull rod, the pull rod is passed through the interior of the rotating shaft and connected to the tooling body; The tooling body includes a movable positioning plate, a fixed tooling cylinder, a reference member disposed in the tooling cylinder and capable of axial movement, and a radially contractible spring cartridge; The front end of the spring cartridge is provided with a plurality of pressure blocks and sealing rings spaced circumferentially, wherein the pressure blocks are used to squeeze the sealing ring so that the sealing ring contracts radially to fit the outer wall of the workpiece; The front end of the reference part is provided with a reference hole and a plurality of equally divided holes penetrating the body thereof. The bottom of the reference hole constitutes a workpiece reference surface. The equally divided holes are T-shaped and communicate with the outside of the reference part for communicating with an air pressure detection device. When the workpiece reference surface is in close contact, the opening is closed and the air pressure is stable. When the workpiece reference surface is not in close contact, the air pressure fluctuates, and the fluctuation value is used to detect the gap between the contact surfaces. The rear end of the reference member is connected to the movable member, and the movable member is movably connected to the pull rod, and an elastic member is provided between the two; The movable part is provided with a plurality of guide posts, the reference part is provided with a plurality of stepped holes adapted to the guide posts, the guide posts pass through the stepped holes on the reference part, and a limiting portion is provided at the front end of the guide posts, the limiting portion and the stepped holes form an axial limiting fit; When the pull rod is pulled back, the driving movable part drives the reference part to move backward, and the spring clamp is squeezed by the inclined part of the tooling cylinder, forcing the pressure block to retract radially and compress the sealing ring to fit the workpiece.

[0005] In the above-mentioned flexible docking tool for the rear-pull airtightness detection belt, an inclined portion is provided on the inner wall of the front end of the tool tube, and the shape of the front end of the spring clamp is adapted to the inclined portion.

[0006] In the above-mentioned flexible docking tooling for post-pull airtight detection belt, the number of the equally divided holes is three, which are evenly distributed on the reference part in the circumferential direction and are used to connect the air pressure detection device to determine the gap between the workpiece fitting surfaces.

[0007] In the above-mentioned flexible docking tooling for post-pull airtight detection belt, the number of the guide pillars is three, and the elastic parts inside them provide axial thrust when the workpieces are docked to ensure the parallelism of the workpieces. The limiting part is a boss at the front end of the guide pillar, and its diameter is larger than the small aperture section of the stepped hole.

[0008] In the above-mentioned flexible docking tooling for post-pull airtightness detection belts, the elastic member is a compression spring, which provides axial thrust when the workpieces are docked to ensure that the reference surfaces of the workpieces are in parallel contact with the reference surfaces.

[0009] In the above-mentioned flexible docking tool for the rear-pull airtightness detection belt, the movable part is detachably connected to the pull rod through the locking sleeve.

[0010] In the above-mentioned flexible docking tool for the back-pull airtightness detection belt, the axis of the equally divided hole of the reference member is perpendicular to the reference plane.

[0011] Compared with existing technologies, this rear-pull airtight detection belt flexible docking tooling quantifies micron-level gaps through air pressure fluctuations, with a sensitivity far exceeding mechanical measurement, achieving high-precision detection. At the same time, the tooling's inclined part and spring clamp design automatically adapt to workpieces of different diameters. Its elastic parts and guide column limit structure design avoid overpressure damage to the workpiece and ensure parallelism. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0013] Figure 2 It is a half-section structural schematic diagram of the present invention.

[0014] Figure 3 It is a schematic diagram of the partially exploded three-dimensional structure of the present invention.

[0015] Figure 4 It is a schematic diagram of the half-section structure of the reference part of the present invention.

[0016] In the figure, 1. box body; 2. positioning plate; 3. tooling cylinder; 4. reference part; 5. spring clamp; 6. pressure block; 7. sealing ring; 8. reference hole; 9. equally divided hole; 10. movable part; 11. elastic part; 12. guide column; 13. stepped hole; 14. limiting part; 15. inclined part. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the present rear-pull airtightness detection belt flexible docking tooling comprises a box body 1, a driving unit and a tooling body, the output end of the driving unit is provided with a coaxially arranged rotating shaft and a pull rod, the pull rod is passed through the inside of the rotating shaft and is connected to the tooling body, the tooling body comprises a movable positioning plate 2, a fixed tooling cylinder 3, a reference part 4 which is arranged in the tooling cylinder 3 and can move axially, and a radially contractible spring clamp 5, the front end of the spring clamp 5 is provided with a plurality of pressure blocks 6 and sealing rings 7 which are circumferentially spaced, the pressure blocks 6 are used to squeeze the sealing rings 7 to make them contract radially to fit the outer wall of the workpiece, the front end of the reference part 4 is provided with a reference hole 8 and a plurality of equally divided holes 9 which pass through its body, the bottom of the reference hole 8 constitutes the workpiece reference surface, the equally divided hole 9 is in a T-shaped structure and is connected to the outside of the reference part 4, In the connected air pressure detection device, when the workpiece reference surface is tightly attached, the orifice is closed and the air pressure is stable. When it is not tightly attached, the air pressure fluctuates, and the gap between the fitting surfaces is detected by the fluctuation value. The rear end of the reference part 4 is connected to the movable part 10, and the movable part 10 is movably connected to the pull rod, and an elastic part 11 is provided between the two. A plurality of guide pillars 12 are provided on the movable part 10, and a plurality of stepped holes 13 adapted to the guide pillars 12 are provided on the reference part 4. The guide pillars 12 pass through the stepped holes 13 on the reference part 4, and a limiting part 14 is provided at the front end of the guide pillars 12. The limiting part 14 forms an axial limiting fit with the stepped holes 13, wherein, when the pull rod is pulled backward, the movable part 10 is driven to drive the reference part 4 to move backward, and the spring clamp 5 is squeezed by the inclined part 15 of the tooling cylinder 3, forcing the pressure block 6 to retract radially, and compressing the sealing ring 7 to fit the workpiece.

[0019] The micron-level gap is quantified by the air pressure fluctuation value, with a sensitivity far exceeding mechanical measurement, achieving high-precision detection. At the same time, the tooling tilting part 15 and the spring clamp 5 are designed to automatically adapt to workpieces of different diameters. The elastic part 11 and the guide column 12 limit structure design avoid overpressure damage to the workpiece and ensure parallelism.

[0020] The inner wall of the front end of the tooling cylinder 3 is provided with an inclined portion 15, and the shape of the front end of the spring clamp 5 is adapted to the inclined portion 15. There are three equally divided holes 9, which are evenly distributed circumferentially on the reference part 4 and are used to connect the air pressure detection device to determine the gap between the workpiece fitting surfaces. There are three guide pillars 12, and the elastic member 11 inside them provides axial thrust when the workpieces are docked to ensure the parallelism of the workpieces. The limiting portion 14 is a boss at the front end of the guide pillar 12, and its diameter is larger than the small aperture section of the stepped hole 13. The elastic member 11 is a compression spring, which provides axial thrust when the workpieces are docked to ensure that the reference planes of the workpieces are in parallel contact with the reference plane. The movable part 10 is detachably connected to the pull rod through a locking sleeve. The axis of the equally divided holes 9 of the reference part 4 is perpendicular to the reference plane.

[0021] The tooling combines mechanical linkage with air pressure detection to achieve air tightness detection and flexible docking of workpieces. The specific process is as follows: 1. The driving unit pulls the pull rod, the movable part 10 moves backward and drives the reference part 4 to move backward; 2. When the reference part 4 moves backward, the spring clamp 5 is squeezed by the inclined portion 15 of the inner wall of the tooling cylinder 3, and the multiple pressure blocks 6 are radially retracted to compress the sealing ring 7 to fit the outer wall of the workpiece, forming a seal; 3. The front end of the reference part 4 is provided with a workpiece reference surface and a T-shaped equally divided hole 9, and is connected to an air pressure detection device. When the workpieces are fitted, the air pressure at the opening of the equally divided hole 9 closed by the reference surface is stable and the gap is qualified. When the workpieces are not fitted, gas leaks and the air pressure fluctuates, and the gap size is quantified by the fluctuation value. 4. The elastic member 11 provides axial thrust to ensure parallel contact of the workpiece reference surface, and its guide column 12 + stepped hole 13 limit: the limiting part 14 (boss) at the front end of the guide column 12 cooperates with the stepped hole 13 to limit the axial displacement range, while allowing fine-tuning to compensate for the workpiece position deviation.

[0022] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0023] Although more terms are used in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A flexible docking tool for a rear-pull airtightness detection belt, characterized in that: It comprises a box (1), a drive unit and a tooling body; The output end of the drive unit is provided with a coaxially arranged rotating shaft and a pull rod, the pull rod is passed through the interior of the rotating shaft and connected to the tooling body; The tooling body comprises a movable positioning plate (2), a fixed tooling cylinder (3), a reference member (4) disposed in the tooling cylinder (3) and capable of axial movement, and a radially contractible spring clamp (5); The inner wall of the front end of the tooling barrel (3) is provided with an inclined portion (15), the shape of the front end of the spring clamp (5) is adapted to the inclined portion (15), and the front end of the spring clamp (5) is provided with a plurality of pressure blocks (6) and sealing rings (7) distributed circumferentially at intervals, and the pressure blocks (6) are used to squeeze the sealing ring (7) to make it contract radially so as to fit the outer wall of the workpiece; The front end of the reference member (4) is provided with a reference hole (8) and a plurality of equally divided holes (9) penetrating the body thereof. The bottom of the reference hole (8) constitutes a workpiece reference surface. The equally divided holes (9) are T-shaped and communicate with the outside of the reference member (4) for communicating with an air pressure detection device. When the workpiece reference surface is pressed tightly against the reference surface, the opening is closed and the air pressure is stable. When the workpiece reference surface is not pressed tightly against the reference surface, the air pressure fluctuates, and the gap between the fitting surfaces is detected by the fluctuation value. The rear end of the reference member (4) is connected to the movable member (10), and the movable member (10) is movably connected to the pull rod, with an elastic member (11) provided between the two. The movable part (10) is provided with a plurality of guide posts (12), the reference part (4) is provided with a plurality of stepped holes (13) adapted to the guide posts (12), the guide posts (12) pass through the stepped holes (13) on the reference part (4), and a limiting portion (14) is provided at the front end of the guide post (12), and the limiting portion (14) forms an axial limiting fit with the stepped holes (13); When the pull rod is pulled back, the driving movable part (10) drives the reference part (4) to move backward, and the spring clamp (5) is squeezed by the inclined part (15) of the tooling cylinder (3), forcing the pressure block (6) to retract radially, and compressing the sealing ring (7) to fit the workpiece.

2. The flexible docking tool for the back-pull airtightness detection belt according to claim 1 is characterized in that: The number of the equally divided holes (9) is three, which are evenly distributed on the reference part (4) in the circumferential direction and are used to connect the air pressure detection device to determine the gap between the workpiece fitting surfaces.

3. The flexible docking tool for the back-pull airtightness detection belt according to claim 1, characterized in that: The number of the guide pillars (12) is three, and the elastic member (11) inside the guide pillars provides axial thrust when the workpieces are docked to ensure the parallelism of the workpieces. The limiting portion (14) is a boss at the front end of the guide pillar (12), and its diameter is larger than the small aperture section of the stepped hole (13).

4. The flexible docking tool for the back-pull airtightness detection belt according to claim 1, characterized in that: The elastic member (11) is a compression spring that provides an axial thrust when the workpieces are butted together, ensuring that the workpiece reference surfaces are in parallel contact with the reference surface.

5. The flexible docking tool for post-pull airtightness detection belt according to claim 1, characterized in that: The movable part (10) is detachably connected to the pull rod via a locking sleeve.

6. The flexible docking tool for the back-pull airtightness detection belt according to claim 1, characterized in that: The axis of the equally divided hole (9) of the reference member (4) is perpendicular to the reference plane.

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