Vacuum clamp for machining thin-wall special-shaped plastic parts

Abstract

The utility model relates to the technical field of part machining, in particular to a vacuum clamp for machining thin-wall special-shaped plastic parts, which is arranged on a machine tool surface of a machining center when in use, is connected with an external vacuum pump and comprises a vacuum sucker and a breather pipe. The vacuum suction cup is arranged on the surface of a machining center machine tool, a fixed shaping unit is arranged on the upper surface of the vacuum suction cup and comprises a positioning block and shaping grooves symmetrically formed in the two sides of the positioning block, air holes are formed in the shaping grooves, and detachable plugs are installed on the air holes. The vacuum suction cup is connected with a ventilation pipe to form a communication air path, and the ventilation pipe is connected with an external vacuum pump. According to the vacuum clamp for machining the thin-wall special-shaped plastic part, tight suction is conducted in a vacuumizing mode, efficiency is high, positioning is reliable, quality is stable, and clamping is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of parts processing, in particular to a vacuum clamp used for processing thin-walled special-shaped plastic parts. Background Art

[0002] At present, for the processing of thin-walled plastic special-shaped plastic parts, most of the clamping method is adopted for clamping and processing. When using special-shaped tooling, due to the small clamping area and shape errors of the workpiece, the clamped product is easy to deform and arch, affecting the product precision and processing efficiency. When using the bonding method, the product is taken down slowly and it is time-consuming and laborious to remove the adhesive.

[0003] Therefore, it is very important to provide a processing tool that uses vacuum to tighten, has high efficiency, reliable positioning, stable quality, and easy clamping. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a vacuum clamp for processing thin-walled special-shaped plastic parts. The utility model changes the problem that the traditional use of special-shaped tooling to clamp products is easy to deform or the use of bonding methods is difficult to disassemble and clean. The processing tooling of the utility model is reliable in positioning and automatically eliminates the positioning gap. When disassembling, you only need to close the vacuum valve and fill it with air to easily remove it. It is convenient to load and unload and has reliable positioning. The traditional method requires pressing the product multiple times to adjust the clamping force each time it is loaded and unloaded to ensure that the product is positioned and fits in place, and the positioning gap is reduced to improve the positioning accuracy. The processing tooling of the utility model automatically fits the positioning surface under vacuum suction, which is not only efficient, but also has high positioning accuracy. The special-shaped clamping jaws of the traditional clamping method are easily deformed during use due to differences in product appearance, and the worn parts need to be repaired regularly. The positioning surface of this solution is also a supporting surface. The force is completely uniform under vacuum suction, and the fixture has a long service life and is still stable and reliable after long-term use.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The utility model provides a vacuum fixture for processing thin-walled special-shaped plastic parts, which is arranged on the bed of a machining center machine tool when in use and is connected to an external vacuum pump, and comprises a vacuum suction cup and a vent pipe;

[0007] The vacuum suction cup is arranged on the bed of the machining center machine tool, and a fixed shaping unit is arranged on the upper surface of the vacuum suction cup, and the fixed shaping unit includes a positioning block and shaping grooves symmetrically arranged on both sides of the positioning block, and air holes are arranged in the shaping grooves, and a detachable plug is installed on the air holes;

[0008] The vacuum suction cup is connected to a vent pipe to form a communicating air path, and the vent pipe is connected to an external vacuum pump.

[0009] In one embodiment of the utility model, a plurality of positioning blocks are provided; the sizes of the shaping grooves located on both sides of different positioning blocks are allowed to be the same or different.

[0010] In one embodiment of the present utility model, the vacuum suction cup is provided with a hollow inner cavity, and a side wall thereof is provided with a connecting hole connected to the ventilation pipe.

[0011] In one embodiment of the utility model, a cylindrical joint is provided on the side wall of the vacuum suction cup, the central axis of the joint is the same as the central axis of the connecting hole, and the vacuum suction cup is connected to the suction pipe through the joint.

[0012] In one embodiment of the present invention, the shaping groove is provided with a sealing ring.

[0013] In one embodiment of the present invention, the air hole is located in the area formed by the sealing ring.

[0014] The utility model discloses a vacuum clamp for processing thin-walled special-shaped plastic parts, which mainly relies on a vacuum pump to generate a vacuum environment, and is connected to a sealing cavity (the sealing cavity is formed by the part to be processed and the sealing ring on the vacuum suction cup) through a vent pipe and a joint; when the vacuum machine is evacuating, the sealing cavity is placed in a vacuum state through the air path, so as to achieve the function of positioning and sucking the part to be processed under the action of vacuum suction; after the processing of the part to be processed is completed, the vacuum pump is turned off and air is injected, the sealing cavity is filled with air, the pressure difference between the inside and the outside is eliminated, and the part can be easily removed.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] (1) High positioning accuracy: vacuum suction can automatically eliminate positioning gaps, achieving high positioning accuracy;

[0017] (2) High clamping efficiency: After the vacuum clamp is installed, you only need to place the parts into the corresponding sealing cavity and turn on the vacuum pump to draw vacuum to achieve rapid positioning and tightening, which is suitable for rapid clamping of large quantities of products.

[0018] (3) Easy disassembly: The vacuum clamp can quickly remove parts by simply inflating the vacuum environment, which makes disassembly very convenient.

[0019] (4) Good economic efficiency: The vacuum clamp is easy to operate, greatly saves positioning time, has high positioning accuracy, does not deform the product, has stable and reliable quality, and significantly improves the overall economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of a vacuum fixture used for processing thin-walled special-shaped plastic parts;

[0021] Figure 2 The figure is a schematic diagram of the structure of a vacuum suction cup in a vacuum fixture used for processing thin-walled special-shaped plastic parts;

[0022] Figure 3 It is a structural schematic diagram of the part to be processed;

[0023] Numbers in the figure: 1. Vacuum suction cup; 11. Positioning block; 12. Shaping groove; 13. Air hole; 14. Connecting hole; 15. Joint; 16. Sealing ring; 2. Ventilation pipe; 3. External vacuum pump. DETAILED DESCRIPTION

[0024] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0028] Example 1

[0029] This embodiment provides a vacuum fixture for processing thin-walled special-shaped plastic parts. When in use, it is set on the bed of a machining center machine tool and connected to an external vacuum pump 3. Figures 1 to 3 As shown, it includes a vacuum suction cup 1 and a vent pipe 2; the vacuum suction cup 1 is arranged on the bed surface of the machining center machine tool, and 8 fixed shaping units are arranged on the upper surface of the vacuum suction cup 1 (a number of units can be arranged according to actual conditions), and the fixed shaping units include a positioning block 11, and shaping grooves 12 symmetrically arranged on both sides of the positioning block 11 (the size and shape of the shaping grooves 12 are adapted to the size and shape of the required parts, the shaping grooves 12 on both sides of the same positioning block 11 have the same size, and the shaping grooves 12 on both sides of different positioning blocks 11 are allowed to be the same or different in size), and the shaping grooves 1 2 is provided with an air hole 13, and a detachable plug is installed on the air hole 13; the vacuum suction cup 1 is provided with a hollow inner cavity, and its side wall is provided with a connecting hole 14 connected to the ventilation pipe 2, and the side wall of the vacuum suction cup 1 is provided with a cylindrical joint 15, and the central axis of the joint 15 is the same as the central axis of the connecting hole 14. The vacuum suction cup 1 is connected to the suction pipe through the joint 15 to form a connecting air path, and the end of the ventilation pipe 2 away from the vacuum suction cup 1 is connected to the external vacuum pump 3, and the shaping groove 12 is provided with a sealing ring 16, and the air hole 13 is located in the area formed by the sealing ring 16.

[0030] During actual use, remove the plug on the air hole 13, place the part to be processed on the upper surface of the vacuum suction cup 1, and use the positioning block 11 to position it, turn on the external vacuum pump 3 to perform vacuuming, and extract the air in the sealed cavity formed by the sealing ring 16 and the part to be processed, so that the sealed cavity is also in a vacuum state, and use the suction force of the vacuum in the sealed cavity to make the part to be processed close to the shaping groove 12 of the vacuum suction cup 1 to reliably position and tightly suck the part to be processed; then the milling process of the structure on the part to be processed can be carried out; when the processing is completed, stop the vacuum pump to intake air, and after the vacuum pipeline enters the air, the air is simultaneously transmitted into the sealed cavity through the vent pipe 2, so as to achieve internal and external pressure balance, eliminate the suction force, and then the removed part after processing can be realized.

[0031] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the interpretation of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A vacuum fixture for processing thin-walled special-shaped plastic parts, which is arranged on a machine bed of a machining center and connected to an external vacuum pump (3) when in use, and is characterized in that: It comprises a vacuum suction cup (1) and a vent pipe (2); The vacuum suction cup (1) is arranged on a machine bed of a machining center, and a fixed shaping unit is arranged on the upper surface of the vacuum suction cup (1), wherein the fixed shaping unit comprises a positioning block (11) and shaping grooves (12) symmetrically arranged on both sides of the positioning block (11), and air holes (13) are arranged in the shaping grooves (12), and a detachable plug is installed on the air hole (13); The vacuum suction cup (1) is connected to the ventilation pipe (2) to form a communicating air path, and the ventilation pipe (2) is connected to an external vacuum pump (3).

2. A vacuum fixture for processing thin-walled special-shaped plastic parts according to claim 1, characterized in that: A plurality of positioning blocks (11) are provided.

3. A vacuum fixture for processing thin-walled special-shaped plastic parts according to claim 2, characterized in that: The shaping grooves (12) located on both sides of different positioning blocks (11) have the same size.

4. A vacuum fixture for processing thin-walled special-shaped plastic parts according to claim 2, characterized in that: The sizes of the shaping grooves (12) located on both sides of different positioning blocks (11) are different.

5. The vacuum fixture for processing thin-walled special-shaped plastic parts according to claim 1, characterized in that: The vacuum suction cup (1) is provided with a hollow inner cavity, and a side wall thereof is provided with a connecting hole (14) connected to the ventilation pipe (2).

6. A vacuum fixture for processing thin-walled special-shaped plastic parts according to claim 5, characterized in that: The side wall of the vacuum suction cup (1) is provided with a cylindrical joint (15).

7. A vacuum fixture for processing thin-walled special-shaped plastic parts according to claim 6, characterized in that: The central axis of the joint (15) is the same as the central axis of the connecting hole (14).

8. The vacuum fixture for processing thin-walled special-shaped plastic parts according to claim 7, characterized in that: The vacuum suction cup (1) is connected to the suction pipe via a joint (15).

9. The vacuum fixture for processing thin-walled special-shaped plastic parts according to claim 1, characterized in that: The shaping groove (12) is provided with a sealing ring (16).

10. The vacuum fixture for processing thin-walled special-shaped plastic parts according to claim 1, characterized in that: The air hole (13) is located in the area formed by the sealing ring (16).

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