Clamping fixture for sheet materials

Abstract

This utility model relates to the field of clamping fixtures, specifically to a clamping fixture for sheet materials. The clamping fixture includes: a rotating structure comprising a turntable suitable for mounting on a CNC machine tool and a three-jaw chuck mounted on the turntable; a clamping structure comprising a clamping plate mounted on the three-jaw chuck and a suction cup detachably connected to the clamping plate and suitable for adsorbing workpieces; a first air passage is provided on the clamping plate, and the first air passage is connected to a vacuum generator; an annular groove is provided on the side of the suction cup opposite to the clamping plate, and a second air passage is provided on the suction cup connecting the annular groove and the first air passage. This utility model's clamping fixture for sheet materials employs a flexible clamping method, which can avoid resonance between the clamping structure and the workpiece, reduce the processing difficulty of the workpiece, and improve the product's pass rate and flatness.

Description

Technical Field

[0001] This utility model relates to the field of clamping fixtures, and more specifically to a clamping fixture for sheet materials. Background Technology

[0002] Clamping fixtures are devices used to fix and position workpieces, ensuring that the workpiece position is accurate and stable during processing.

[0003] Existing sheet materials are often held using rigid clamping structures such as grippers. In actual use, it has been found that the sheet material resonates with the grippers, increasing the processing difficulty of the sheet material and reducing the yield rate.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To improve or solve the technical problem of resonance occurring when using rigid clamping structures to hold sheet materials in existing technologies, thus affecting the processing of sheet materials, this utility model provides a clamping fixture for sheet materials. The clamping fixture includes: a rotating structure comprising a turntable suitable for mounting on a CNC machine tool and a three-jaw chuck mounted on the turntable; a clamping structure comprising a clamping plate mounted on the three-jaw chuck and a suction cup detachably connected to the clamping plate and suitable for adsorbing workpieces; a first air passage is provided on the clamping plate, and the first air passage is connected to a vacuum generator; an annular groove is provided on the side of the suction cup opposite to the clamping plate, and a second air passage is provided on the suction cup connecting the annular groove and the first air passage.

[0006] This utility model discloses a clamping fixture for sheet materials, comprising a rotating structure and a clamping structure. The rotating structure includes a turntable and a three-jaw chuck. The three-jaw chuck can mount the clamping structure, and the turntable drives the three-jaw chuck and clamping structure to rotate, facilitating the processing of the workpiece clamped by the clamping structure. The clamping structure includes a clamping plate and a suction cup. The clamping plate has a first air passage connected to a vacuum generator. The suction cup has an annular groove and a second air passage connecting the annular groove and the first air passage. The vacuum generator, the first air passage, the second air passage, and the annular groove form a gas passage, thereby adsorbing the workpiece onto the suction cup. The annular groove increases the contact area between the air passage and the workpiece, ensuring effective clamping. Simultaneously, the flexible clamping method of the suction cup avoids resonance between the clamping structure and the workpiece, reducing the processing difficulty of the workpiece and improving the product's pass rate and flatness. With the above-mentioned design, the clamping fixture for sheet materials of this utility model adopts a flexible clamping method, which can avoid resonance between the clamping structure and the workpiece, reduce the processing difficulty of the workpiece, and improve the product qualification rate and flatness.

[0007] Furthermore, a seamless steel pipe is provided between the vacuum generator and the clamping plate, and a rotatable joint is provided between the vacuum generator and the seamless steel pipe.

[0008] Furthermore, the clamping disk and the suction cup are detachably connected.

[0009] Furthermore, a magnetic platform is embedded in the clamping disk, and the magnetic platform is magnetically connected to the suction cup.

[0010] Furthermore, a connecting groove is provided on the suction cup to connect the second air passage and the annular groove.

[0011] Furthermore, the second air path includes a central air path located at the middle position of the suction cup and a side air path arranged circumferentially along the suction cup; the first air path includes a main air path connecting the central air path and the vacuum generator, and an auxiliary air path connecting the main air path and the side air path; the auxiliary air path extends obliquely within the clamping plate.

[0012] Furthermore, the vacuum generator is a water-circulating vacuum pump.

[0013] In summary, compared with the prior art, this utility model has the following beneficial effects: (1) The rotating structure includes a turntable and a three-jaw chuck. The three-jaw puller can install the clamping structure, and the turntable can drive the three-jaw chuck and the clamping structure to rotate, thereby facilitating the processing of the workpiece clamped by the clamping structure. (2) The clamping structure includes a clamping plate and a suction cup; the clamping plate has a first air passage and is connected to a vacuum generator; the suction cup has an annular groove and a second air passage connecting the annular groove and the first air passage; the vacuum generator, the first air passage, the second air passage and the annular groove can form a gas passage, thereby adsorbing the workpiece onto the suction cup; the annular groove can expand the contact area between the air passage and the workpiece, ensuring the clamping effect of the workpiece; at the same time, the suction cup adsorption flexible clamping method can avoid resonance between the clamping structure and the workpiece, reduce the processing difficulty of the workpiece, and improve the product qualification rate and flatness. Attached Figure Description

[0014] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of an embodiment of the clamping fixture for sheet materials according to the present invention; Figure 2 This is a schematic diagram of the first side of the suction cup in the clamping fixture for sheet materials of this utility model; Figure 3 This is a schematic diagram of the second side of the suction cup in the clamping fixture for sheet materials according to this utility model.

[0015] List of reference numerals in the attached drawings: 1. Rotating structure; 11. Turntable; 12. Three-jaw chuck; 2. Clamping structure; 21. Clamping plate; 22. Suction cup; 23. Seamless steel pipe; 24. Rotatable joint; 25. First air passage; 251. Main air passage; 252. Auxiliary air passage; 26. Second air passage; 261. Middle air passage; 262. Bypass air passage; 27. Annular groove; 28. Connecting groove; 29. ​​Strip groove. Detailed Implementation

[0016] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0017] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" 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 direct connection, an indirect connection through an intermediate medium, or a connection within 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.

[0019] To improve or solve the technical problem that resonance occurs when a rigid clamping structure 2 clamps sheet materials in the prior art, affecting the processing of sheet materials, this utility model provides a clamping fixture for sheet materials. The clamping fixture includes: a rotating structure 1, including a turntable 11 suitable for mounting on a CNC machine tool, and a three-jaw chuck 12 mounted on the turntable 11; a clamping structure 2, including a clamping disk 21 mounted on the three-jaw chuck 12, and a suction cup 22 detachably connected to the clamping disk 21 and suitable for adsorbing workpieces; a first air passage 25 is provided on the clamping disk 21, and the first air passage 25 is connected to a vacuum generator; an annular groove 27 is provided on the side of the suction cup 22 opposite to the clamping disk 21, and a second air passage 26 is provided on the suction cup 22 connecting the annular groove 27 and the first air passage 25.

[0020] Figure 1 This is a schematic diagram of an embodiment of the clamping fixture for sheet materials according to this utility model. Figure 1 As shown, in one or more embodiments, the clamping fixture for sheet materials of this utility model includes a rotating structure 1, a clamping structure 2, and a vacuum generator.

[0021] See also Figure 1 The rotating structure 1 is suitable for installation on a CNC machine tool and is used to drive the clamping structure 2 to rotate. In one or more embodiments, the rotating structure 1 includes a turntable 11 and a three-jaw chuck 12 mounted on the turntable 11. The turntable 11 is an electric turntable 11, and the three-jaw chuck 12 is fixedly connected to the electric turntable 11 by bolts. The three-jaw chuck 12 is a manual three-jaw chuck 12. Through holes are provided in the middle of both the turntable 11 and the three-jaw chuck 12 to allow the clamping structure 2 to connect to a vacuum generator.

[0022] See also Figure 1 The clamping structure 2 is mounted on the rotating structure 1. In one or more embodiments, the clamping structure 2 includes a clamping disk 21 mounted on a three-jaw chuck 12 and a suction cup 22 detachably connected to the clamping disk 21. The clamping disk 21 is mounted on the three-jaw chuck 12, and a seamless steel pipe 23 is provided between the clamping disk 21 and the vacuum generator. Specifically, the vacuum generator is a water-circulating vacuum pump, and a rotatable joint 24 connecting the vacuum generator's vacuum pipe and the seamless steel pipe 23 is provided. When the clamping structure 2 rotates, the seamless steel pipe 23 rotates accordingly, while the rotatable joint 24 and the vacuum generator remain fixed. The seamless steel pipe 23 can be fixedly connected to the clamping disk 21 via a threaded connection structure or a welded structure. Exemplarily, the water-circulating vacuum pump includes a water tank, a pump body, a motor, a vacuum gauge, a vacuum pipe, and a pressure gauge. The water tank stores circulating water; the motor provides power to drive the pump body; the vacuum gauge is mounted on the vacuum pipe to measure and display the vacuum level; and the pressure gauge monitors the exhaust pressure. The water circulation vacuum pump can be any commonly available vacuum pump on the market, and details will not be elaborated further.

[0023] Figure 2 This is a schematic diagram of the first side view of the suction cup in the clamping fixture for sheet materials according to this utility model. Figure 3 This is a schematic diagram of the second side of the suction cup in the clamping fixture for sheet materials according to this utility model. (See diagram below.) Figure 2 and Figure 3As shown, in one or more embodiments, a first air passage 25 is provided on the clamping disk 21, and the first air passage 25 is connected to the seamless steel pipe 23. Specifically, the first air passage 25 includes a main air passage 251 located in the middle of the clamping disk 21, and an auxiliary air passage 252 extending obliquely within the clamping disk 21. The clamping disk 21 has opposing first and second end faces. The main air passage 251 extends from the first end face to the second end face, and the auxiliary air passage 252 extends from the main air passage 251 to the second end face. Further, four auxiliary air passages 252 are provided, and the four auxiliary air passages 252 are evenly and spaced apart along the circumference of the main air passage 251. Further, a magnetic platform is embedded in the clamping disk 21, and the magnetic platform forms a magnetic connection with the suction cup 22, thereby detachably fixing the suction cup 22 to the clamping disk 21. Specifically, multiple magnetic platforms are provided, and the multiple magnetic platforms are spaced apart and evenly arranged along the circumference of the clamping disk 21. For example, the diameter of the clamping plate 21 is 300mm, and the diameter of the suction cup 22 can be selected from 300mm to 500mm. Further, the suction cup 22 has opposing first and second sides, and a second air passage 26 communicating with the first air passage 25 is formed on the suction cup 22, extending from the first side to the second side. Specifically, the second air passage 26 includes a central air passage 261 corresponding to the main air passage 251, and a bypass air passage 262 corresponding to the auxiliary air passage 252, the bypass air passages 262 being evenly and spaced along the circumference of the central air passage 261. Further, the first side faces the workpiece, and the second side faces the clamping plate 21. A strip groove 29 is formed on the second side, connecting the central air passage 261 and the bypass air passage 262. An annular groove 27 is formed on the first side, including an inner annular groove and an outer annular groove, the inner annular groove communicating with the central air passage 261, and the outer annular groove communicating with the bypass air passage 262. Specifically, a connecting groove 28 is provided on the first side, which connects the inner ring groove and the middle gas passage 261, and the outer ring groove and the bypass gas passage 262.

[0024] The working principle of this utility model is as follows: Select the appropriate size suction cup 22 according to the size of the sheet material, place the sheet material and suction cup 22 on the clamping plate 21, turn on the vacuum generator, the vacuum generator generates negative pressure, sucking out the air from the seamless steel pipe 23, the first air passage 25, the second air passage 26 and the annular groove 27, forming a vacuum to adsorb the sheet material onto the suction cup 22; drive the three-jaw chuck 12 to rotate through the turntable 11 to realize the rotational processing of the sheet material.

[0025] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A clamping fixture for sheet materials, characterized in that, include: The rotating structure (1) includes a turntable (11) suitable for mounting on a CNC machine tool, and a three-jaw chuck (12) mounted on the turntable (11); The clamping structure (2) includes a clamping disk (21) mounted on the three-jaw chuck (12) and a suction cup (22) detachably connected to the clamping disk (21) and adapted to adsorb workpieces; a first air passage (25) is provided on the clamping disk (21) and the first air passage (25) is connected to a vacuum generator; an annular groove (27) is provided on the side of the suction cup (22) opposite to the clamping disk (21) and a second air passage (26) is provided on the suction cup (22) connecting the annular groove (27) and the first air passage (25).

2. The clamping fixture for sheet materials according to claim 1, characterized in that, A seamless steel pipe (23) is provided between the vacuum generator and the clamping plate (21), and a rotatable joint (24) is provided between the vacuum generator and the seamless steel pipe (23).

3. The clamping fixture for sheet materials according to claim 1, characterized in that, The clamping plate (21) and the suction cup (22) are detachably connected.

4. The clamping fixture for sheet materials according to claim 3, characterized in that, A magnetic platform is embedded in the clamping disk (21), and the magnetic platform is magnetically connected to the suction cup (22).

5. The clamping fixture for sheet materials according to claim 1, characterized in that, A connecting groove (28) is provided on the suction cup (22) to connect the second air passage (26) and the annular groove (27).

6. The clamping fixture for sheet materials according to claim 1, characterized in that, The second air passage (26) includes a central air passage (261) located in the middle of the suction cup (22) and a side air passage (262) arranged circumferentially along the suction cup (22); the first air passage (25) includes a main air passage (251) connecting the central air passage (261) and the vacuum generator, and an auxiliary air passage (252) connecting the main air passage (251) and the side air passage (262); the auxiliary air passage (252) extends obliquely within the clamping plate (21).

7. The clamping fixture for sheet materials according to claim 1, characterized in that, The vacuum generator is a water-circulating vacuum pump.

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