Flexible vacuum adsorption tool

Abstract

The utility model discloses a flexible vacuum adsorption tool. A top cover is fixed at the upper end of a cylinder body, and a base is hermetically fixed at the lower end of the cylinder body; the screw is fixed in the base through threads, a spring II sleeves the outer circle of the screw, and an adapter is fixed at the upper end of the screw; the lower end of the piston rod is sleeved outside the upper end of the spring II, the outer circle of the piston rod is in sealed sliding connection with the middle of the reducing hole of the cylinder body, the annular clamping boss is clamped on the adapter, and the upper end of the piston rod is in sealed sliding connection with a center hole of the top cover; the piston seal is slidably connected to the bottom end of the upper part of the cylinder body reducing hole; the conical expansion sleeve is mounted between a conical hole of a piston center hole II and the piston rod; a rectangular spring is arranged between the conical expansion sleeve and the top cover; the rectangular spring and the spring II are compressed to a set length in an initial state; a supporting head and a suction cup arranged outside the supporting head in a sleeving mode are fixedly installed at the top end of the piston rod. The device is simple in structure, convenient to use, high in stability in the machining process, safe, reliable, high in adaptability and capable of being widely applied to machining of aviation and spaceflight parts.

Description

Technical Field

[0001] The utility model belongs to the field of aviation and aerospace machining, and relates to a flexible vacuum adsorption tooling. Background Technique

[0002] Nowadays, the aviation, aerospace, and precision machining industries are developing rapidly, and at the same time, the requirements for the precision and quality of products are getting higher and higher. The stiffness of many products in the aviation and aerospace fields is not particularly good. Therefore, during machining, the vacuum adsorption method is adopted to ensure the stability of the product machining process. However, for some parts with curvature, only a special vacuum adsorption tooling that conforms to the shape can be made to achieve this, so the tooling has poor versatility, a long overall production cycle, and high costs. Content of the Utility Model

[0003] The purpose of the utility model is to solve the above problems existing in the prior art, and provide a flexible vacuum adsorption tooling. This tooling has strong versatility and a wide application range, and can be widely used in the machining of aviation and aerospace parts; it can be used alone or multiple toolings can be used together, is convenient to use, simple to maintain, has high stability, and is safe and reliable during the machining process.

[0004] To achieve the above object, the technical solution of the present utility model is: a flexible vacuum adsorption tooling, including a cylinder body, a base, a screw rod, a swivel joint, a piston rod, a conical expansion sleeve, a piston, a top cover, a suction cup, a support head, a valve body, a valve core, a spring I, a spring II and a rectangular spring; a variable-diameter hole is opened in the center of the cylinder body, the diameter of the middle part of the variable-diameter hole matches the diameter of the piston rod, and the diameters of the upper and lower parts are the same and larger than the diameter of the middle part; the top cover is fixed at the upper end of the cylinder body, and the base is hermetically fixed at the lower end; the screw rod is threadedly fixed in the central threaded hole of the base and sealed by an O-ring, a spring II is sleeved on its outer circle, and a swivel joint is fixed at its upper end; a central hole I is opened in the center of the piston rod, and a swivel joint annular clamping boss is provided in the middle of the central hole I; the lower end of the piston rod is sleeved outside the upper end of the spring II and its outer circle is hermetically slidably connected with the middle part of the variable-diameter hole of the cylinder body, and the annular clamping boss is clamped on the swivel joint, and the upper end of the piston rod is hermetically slidably connected with the central hole of the top cover; a central hole II with an upper conical hole and a lower cylindrical hole is opened in the center of the piston, and the diameter of the lower cylindrical hole is larger than the maximum diameter of the upper conical hole; the piston is hermetically slidably connected to the bottom end of the upper part of the variable-diameter hole of the cylinder body, and the conical expansion sleeve is installed between the conical hole of the central hole II of the piston and the piston rod; a rectangular spring sleeved on the outer circle of the piston rod is arranged between the conical expansion sleeve and the top cover; a compressed air cavity is provided between the piston and the cylinder body; a vent hole I communicating with the compressed air cavity is opened on the circumferential wall of the middle part of the cylinder body, and a compressed air joint is installed on the vent hole I; a vacuum cavity is provided between the base and the lower part of the variable-diameter hole of the cylinder body, a vent hole II communicating with the vacuum cavity is opened on the base, and a vacuum extraction joint is installed on the vent hole II; in the initial state, both the rectangular spring and the spring II have been compressed to the set length; a support head and a suction cup sleeved outside the support head are fixedly installed on the top end of the piston rod, an air extraction hole is provided inside the support head, and a vacuum logic valve connecting the air extraction hole of the support head and the central hole I of the piston rod is installed in the bottom groove of the support head.

[0005] Further preferably, the upper end diameter of the central hole of the top cover becomes larger to form an installation ring groove for a dust-proof ring; a dust-proof ring with an inner hole having a diameter matching that of the piston rod is sleeved on the piston rod and fixed in the installation ring groove of the top cover. The dust-proof ring prevents sundries from entering the cylinder body.

[0006] Further preferably, both the compressed air joint and the vacuum extraction joint adopt quick-connect joints.

[0007] Working principle of the utility model: In the initial state, spring II is in a compressed state. Spring II abuts against the piston rod, making the piston rod in the topmost position. In the initial state, the rectangular spring is in a compressed state, giving the piston a downward pressure, causing the conical expansion sleeve to be tightened, and then locking the piston rod. When in use, first introduce compressed air into the compressed air chamber. Under the action of the compressed air, the piston moves upward, thus unlocking the conical expansion sleeve and making the piston rod in a free state. The flexible vacuum adsorption tooling can be used alone or multiple sets can be combined together. Place the workpiece, and the workpiece adaptively contacts the support head. Then stop supplying air at the compressed air interface, and lock the piston rod. After locking, evacuate through the vacuum interface to adsorb the workpiece and then process the part, which can increase the stability during the workpiece processing. When there is a workpiece at the suction cup, evacuate, and the vacuum logic valve can open to adsorb the workpiece. When there is no workpiece at the suction cup and evacuating, the vacuum logic valve is in a closed state to ensure no connection with the outside atmosphere, making the use of the entire mechanism more convenient.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows: Integrate the vacuum adsorption and locking mechanisms together. Achieve locking through the mechanical structure and unlocking through compressed air, which can ensure the safety and reliability during the part processing, prevent sudden air cut-off and cause part scrapping. At the same time, multiple sets of toolings can be selected to be used together, with strong overall adaptability, capable of meeting the processing of flat parts and parts with a certain curvature. The utility model has strong versatility and wide application range, and can be widely applied to the processing of aviation and aerospace parts. It can be used alone or multiple toolings can be used together, with convenient use, simple structure, simple maintenance, high stability, safety and reliability during the processing. Brief Description of the Drawings

[0009] Figure 1 is the three-dimensional structure schematic diagram of the utility model;

[0010] Figure 2 is the front view of the utility model;

[0011] Figure 3 is the top view of the utility model;

[0012] Figure 4 is Figure 3 the AA sectional view of Detailed Embodiment

[0013] The following further describes the utility model in conjunction with the drawings and specific embodiments.

[0014] As Figures 1 to 4As shown in the figure, this embodiment includes a cylinder block 1, a base 2, a screw rod 3, a swivel joint 4, a piston rod 5, a conical expansion sleeve 6, a piston 7, a top cover 8, a suction cup 9, a support head 10, a valve body 16, a valve core 17, a spring I 18, a spring II 21, a rectangular spring 20, a compressed air connector 23, and a vacuum connector 26. For the convenience of operation, in this embodiment, both the compressed air connector 23 and the vacuum connector 26 adopt quick-connect joints. A stepped hole is provided in the center of the cylinder block 1. The diameter of the middle part of the stepped hole matches the diameter of the piston rod 5, and the diameters of the upper and lower parts are the same and larger than the diameter of the middle part. The top cover 8 is fixed to the upper end of the cylinder block 1, and the base 2 is hermetically fixed to the lower end of the cylinder block 1 through an O-ring I 11 installed at the root of the step of the base 2. To prevent foreign matters from entering the cylinder block 1, in this embodiment, the diameter of the upper end of the central hole of the top cover 8 becomes larger to form an installation ring groove for the dust-proof ring 22; the dust-proof ring 22 with an inner hole whose diameter matches the piston rod 5 is sleeved on the piston rod 5 and fixed in the installation ring groove of the top cover 8. The screw rod 3 is threadedly fixed in the central threaded hole of the base 2 through an O-ring II 12 installed in the outer ring groove of the screw rod 3 and is sealed by the O-ring. A spring II 21 is sleeved on its outer circle, and a swivel joint 4 is fixed to its upper end. A central hole I with a swivel joint annular clamping boss in the middle is provided in the center of the piston rod 5. The lower end of the piston rod 5 is sleeved outside the upper end of the spring II 21, and its outer circle is hermetically and slidably connected to the middle part of the stepped hole of the cylinder block 1 through an O-ring VII 27. The annular clamping boss is clamped on the swivel joint. The upper end of the piston rod 5 is hermetically and slidably connected to the central hole of the top cover 8 through an O-ring IV 14 installed in the inner hole ring groove of the top cover 8. A central hole II with an upper conical hole and a lower cylindrical hole is provided in the center of the piston 7. The diameter of the lower cylindrical hole is larger than the maximum diameter of the upper conical hole. The piston 7 is hermetically and slidably connected to the bottom end of the upper part of the stepped hole of the cylinder block 1 through O-rings V 15 and III 13 installed on the outer circle and inner hole ring groove of the piston 7. The conical expansion sleeve 6 is installed between the upper conical hole of the central hole II of the piston 7 and the piston rod 5. A rectangular spring 20 sleeved on the outer circle of the piston rod 5 is provided between the conical expansion sleeve 6 and the top cover 8. A compressed air chamber 25 is provided between the piston 7 and the cylinder block 1. An air vent I communicating with the compressed air chamber 25 is provided on the circumferential wall of the middle part of the cylinder block 1, and a compressed air connector 23 is installed on the air vent I. A vacuum chamber 24 is provided between the base 2 and the lower part of the stepped hole of the cylinder block 1. An air vent II communicating with the vacuum chamber 24 is provided on the base 2, and a vacuum connector 26 is installed on the air vent II. In the initial state, both the rectangular spring 20 and the spring II 21 have been compressed to the set length. A support head 10 and a suction cup 9 sleeved outside the support head 10 are fixedly installed on the top end of the piston rod 5. An air extraction hole is provided inside the support head 10, and a vacuum logic valve connecting the air extraction hole of the support head 10 and the central hole I of the piston rod 5 is installed in the bottom groove of the support head 10.Preferably, the vacuum logic valve includes a valve body 16, a T-shaped valve core 17, and a spring I 18; a stepped through hole is provided in the center of the valve body 16, and it is threadedly sealed in the bottom groove of the support head 10 through an O-ring VI 19. The upper end of the spring I 18 is sleeved on the T-shaped valve core 17. The T-shaped valve core 17 and the spring I 18 are installed together in the stepped through hole of the valve body 16, and the T-shaped valve core 17 abuts against the bottom groove of the support head 10.

[0015] The working principle of the present invention: In the initial state, the spring II 21 is in a compressed state. The spring II 21 abuts against the piston rod 5, making the piston rod 5 in the topmost position; in the initial state, the rectangular spring 20 is in a compressed state, giving a downward pressure to the piston 7, making the tapered expansion sleeve 6 tightened, and then locking the piston rod. Compressed air is introduced into the compressed air chamber 25. Under the action of the compressed air, the piston 7 moves upward, so that the tapered expansion sleeve 6 is unlocked and the piston rod 5 is in a free state. The flexible vacuum adsorption tooling can be used alone or combined together. Place the workpiece, and the workpiece is adaptively contacted with the support head 10. Then, the air supply stops at the compressed air interface, and the piston rod 5 is locked. After locking, vacuum is drawn through the vacuum interface to adsorb the workpiece and then process the part, which can increase the stability during the workpiece processing. When there is a workpiece at the suction cup 9, vacuum is drawn, and the vacuum logic valve can be opened to adsorb the workpiece; when there is no workpiece at the suction cup 9, vacuum is drawn, and the vacuum logic valve is in a closed state to ensure no communication with the outside atmosphere, thus making the use of the entire mechanism more convenient.

[0016] Certainly, the present invention has many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make corresponding changes and deformations according to the present invention, but these corresponding changes and deformations should all belong to the improvements of equivalent technologies and fall within the protection scope of the claims of the present invention.

Claims

1. A flexible vacuum adsorption tooling, characterized in that: It includes a cylinder block, a base, a screw rod, a union joint, a piston rod, a tapered expansion sleeve, a piston, a top cover, a suction cup, a support head, a valve body, a valve core, Spring I, Spring II and a rectangular spring; a stepped hole is formed in the center of the cylinder block, the diameter of the middle part of the stepped hole matches the diameter of the piston rod, and the diameters of the upper and lower parts are the same and larger than the diameter of the middle part; the top cover is fixed to the upper end of the cylinder block, and the base is hermetically fixed to the lower end; the screw rod is threadedly fixed in the central threaded hole of the base and sealed by an O-ring, and Spring II is sleeved on its outer circumference, and the union joint is fixed to its upper end; a central hole I is formed in the center of the piston rod, and an annular clamping boss of the union joint is provided in the middle of the central hole I; the lower end of the piston rod is sleeved outside the upper end of Spring II and its outer circumference is hermetically and slidably connected to the middle part of the stepped hole of the cylinder block, and the annular clamping boss is clamped on the union joint, and the upper end of the piston rod is hermetically and slidably connected to the central hole of the top cover; a central hole II with an upper tapered hole and a lower cylindrical hole is formed in the center of the piston, and the diameter of the lower cylindrical hole is larger than the maximum diameter of the upper tapered hole; the piston is hermetically and slidably connected to the bottom end of the upper part of the stepped hole of the cylinder block, and the tapered expansion sleeve is installed between the tapered hole of the central hole II of the piston and the piston rod; a rectangular spring sleeved on the outer circumference of the piston rod is arranged between the tapered expansion sleeve and the top cover; a compressed air chamber is provided between the piston and the cylinder block; a vent hole I communicating with the compressed air chamber is formed in the peripheral wall of the middle part of the cylinder block, and a compressed air joint is installed on the vent hole I; a vacuum chamber is provided between the base and the lower part of the stepped hole of the cylinder block, and a vent hole II communicating with the vacuum chamber is formed in the base, and a vacuum extraction joint is installed on the vent hole II; in the initial state, both the rectangular spring and Spring II have been compressed to the set length; a support head and a suction cup sleeved outside the support head are fixedly installed on the top end of the piston rod, an air extraction hole is provided inside the support head, and a vacuum logic valve connecting the air extraction hole of the support head and the central hole I of the piston rod is installed in the bottom groove of the support head.

2. The flexible vacuum adsorption tooling according to claim 1, characterized in that: The diameter of the upper end part of the central hole of the top cover becomes larger to form an installation ring groove for a dust-proof ring; the dust-proof ring with an inner hole having a diameter matching that of the piston rod is sleeved on the piston rod and fixed in the installation ring groove of the top cover.

3. The flexible vacuum adsorption tooling according to claim 1 or 2, characterized in that: Both the compressed air joint and the vacuum extraction joint adopt quick-connect joints.

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