Box type vacuum jig

Abstract

The utility model relates to the technical field of vacuum jigs, in particular to a box type vacuum jig which comprises a jig base, a jig top cover and a sealing ring annularly arranged between the jig base and the jig top cover, the top of the jig top cover protrudes and extends to form a product limiting support, the top of the product limiting support protrudes and extends to form a vacuum adsorption mold, and the vacuum adsorption mold protrudes and extends to form the vacuum jig. A first through hole is formed in the side face of the jig base, a containing cavity is formed in the top of the jig base, and a second through hole penetrating through the vacuum adsorption mold, the product limiting support and the jig top cover is formed in the middle of the vacuum adsorption mold. Air between the product and the vacuum adsorption mold is exhausted from the second through hole, the containing cavity and the first through hole through vacuumizing, so that a relatively independent and sealed space is formed between the product and the vacuum adsorption mold, the adsorption force borne by the product is uniform, clamping and fixing are achieved, and the phenomenon that due to incomplete adsorption and fixing, cutter connecting lines appear on the surface of the machined product is avoided; and the product is prevented from being damaged due to overlarge local stress.

Description

Technical Field

[0001] This utility model relates to the field of vacuum fixture technology, specifically to a box-type vacuum fixture. Background Technology

[0002] In the processing of products such as plastic upper and lower shells, mechanical fixtures are usually required to fix the product by partial clamping in order to perform a series of CNC machining operations on the product surface. This can easily lead to indentations and damage at the clamping points. If vacuum adsorption is used, the multiple mounting pillars on the internal periphery of the product make it difficult to achieve vacuum adsorption. This can easily result in tool marks on the processed product surface due to incomplete adsorption and fixation. If the adsorption force is too strong, it can easily cause excessive local stress and damage the product. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a box-type vacuum fixture.

[0004] The objective of this utility model is achieved through the following technical solution: a box-type vacuum fixture, comprising a fixture base, a fixture top cover covering the top of the fixture base, and a sealing ring surrounding the fixture base and the fixture top cover. A product limiting support protrudes from the top of the fixture top cover, and a vacuum adsorption mold protrudes from the top of the product limiting support. A first through hole is provided on the side of the fixture base, and a cavity is provided on the top of the fixture base. A second through hole is provided in the middle of the vacuum adsorption mold, penetrating the vacuum adsorption mold, the product limiting support, and the fixture top cover. The second through hole, the cavity, and the first through hole are sequentially connected.

[0005] Preferably, the edge of the product limiting support is provided with a limiting groove for cooperating with the product's mounting post.

[0006] Preferably, the top of the fixture base is provided with an annular positioning groove, and the sealing ring abuts against the annular positioning groove.

[0007] Preferably, the vacuum adsorption mold includes an adsorption part protruding from the top of the product limiting support, and a product abutment part protruding from the top of the product limiting support and circumferentially surrounding the outer periphery of the adsorption part. The second through hole is opened in the middle of the adsorption part, and the product abutment part is used to abut against the inner surface of the product.

[0008] Preferably, the height of the product contact portion is higher than the height of the adsorption portion.

[0009] Preferably, the adsorption section has multiple guide grooves, and adjacent guide grooves are connected.

[0010] Preferably, the second through hole and the guide groove adjacent to the second through hole are connected.

[0011] The beneficial effects of this utility model are as follows: The box-type vacuum fixture of this utility model adopts a fixture base, a fixture top cover covering the top of the fixture base, and a sealing ring surrounding the fixture base and the fixture top cover. A product limiting support protrudes from the top of the fixture top cover, and a vacuum adsorption mold protrudes from the top of the product limiting support. A first through hole is opened on the side of the fixture base, and a cavity is opened on the top of the fixture base. A second through hole is opened in the middle of the vacuum adsorption mold, penetrating the vacuum adsorption mold, the product limiting support, and the fixture top cover. The second through hole, the cavity, and the first through hole are connected in sequence. When the product is aligned and placed on the vacuum adsorption mold, the air between the product and the vacuum adsorption mold is discharged through the second through hole, the cavity, and the first through hole by vacuuming, so that a relatively independent and sealed space is formed between the product and the vacuum adsorption mold. The adsorption force on the product is uniform, and clamping and fixing are achieved, avoiding the appearance of tool marks on the surface of the processed product due to incomplete adsorption and fixing, and avoiding damage to the product due to excessive local stress. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is an exploded view of the present invention;

[0014] Figure 3 yes Figure 2 Enlarged diagram of A in the middle;

[0015] The attached figures are labeled as follows: 1. Fixture base; 2. Fixture top cover; 3. Sealing ring; 4. Product limiting support; 5. Vacuum adsorption mold; 51. Adsorption part; 52. Product abutment part; 6. First through hole; 7. Cavity; 8. Second through hole; 9. Limiting groove; 10. Annular positioning groove; 11. Guide groove. Detailed Implementation

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0017] like Figure 1-3 As shown, a box-type vacuum fixture includes a fixture base 1, a fixture top cover 2 covering the top of the fixture base 1, and a sealing ring 3 encircling the fixture base 1 and the fixture top cover 2. A product limiting support 4 protrudes from the top of the fixture top cover 2, and a vacuum adsorption mold 5 protrudes from the top of the product limiting support 4. A first through hole 6 is provided on the side of the fixture base 1, and a cavity 7 is provided on the top of the fixture base 1. A second through hole 8 is provided in the middle of the vacuum adsorption mold 5, penetrating the vacuum adsorption mold 5, the product limiting support 4, and the fixture top cover 2. The second through hole 8, the cavity 7, and the first through hole 6 are connected in sequence.

[0018] This box-type vacuum fixture comprises a fixture base 1, a fixture top cover 2 covering the top of the fixture base 1, and a sealing ring 3 encircling the fixture base 1 and the fixture top cover 2. A product limiting support 4 protrudes from the top of the fixture top cover 2, and a vacuum adsorption mold 5 protrudes from the top of the product limiting support 4. A first through hole 6 is provided on the side of the fixture base 1, and a cavity 7 is provided on the top of the fixture base 1. A through-hole is provided in the middle of the vacuum adsorption mold 5, penetrating the vacuum adsorption mold 5, the product limiting support 4, and the fixture top cover 2. The second through hole 8, the cavity 7, and the first through hole 6 are connected in sequence. When the product is placed in the vacuum adsorption mold 5, the air between the product and the vacuum adsorption mold 5 is discharged through the second through hole 8, the cavity 7, and the first through hole 6 by vacuuming. This creates a relatively independent and sealed space between the product and the vacuum adsorption mold 5, ensuring that the adsorption force on the product is uniform and that it is clamped and fixed. This avoids the appearance of tool marks on the surface of the processed product due to incomplete adsorption and fixation, and avoids damage to the product due to excessive local stress.

[0019] Furthermore, the edge of the product limiting support 4 is provided with a limiting groove 9 for matching with the product mounting post, which facilitates the alignment of the product with the product limiting support 4, helps to prevent the product from being misaligned, and also helps the vacuum adsorption mold 5 to avoid the product mounting post, thus avoiding the reduction of vacuum adsorption effect due to the influence of the product mounting post.

[0020] Furthermore, the top of the fixture base 1 is provided with an annular positioning groove 10, and the sealing ring 3 abuts against the annular positioning groove 10, which improves the installation efficiency of the sealing ring 3 and helps to avoid the sealing effect being affected by the misalignment of the sealing ring 3, thereby weakening the adsorption force.

[0021] Furthermore, the vacuum adsorption mold 5 includes an adsorption part 51 protruding from the top of the product limiting support 4, and a product abutment part 52 protruding from the top of the product limiting support 4 and surrounding the outer periphery of the adsorption part 51. The second through hole 8 is opened in the middle of the adsorption part 51, and the product abutment part 52 is used to abut against the inner surface of the product.

[0022] Furthermore, the height of the product abutment portion 52 is higher than the height of the adsorption portion 51. Preferably, the height of the product abutment portion 52 is 1-5 mm higher than the height of the adsorption portion 51, more preferably 2 mm. The inner surface of the product abuts against the product abutment portion 52 to form a relatively sealed space. After vacuuming, the product is fixed by the pressure difference.

[0023] Furthermore, the adsorption section 51 is provided with a plurality of guide grooves 11, and two adjacent guide grooves 11 are connected. Furthermore, the second through hole 8 and the guide groove 11 adjacent to the second through hole 8 are connected; this is beneficial for air flow and promotes vacuuming.

[0024] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.

Claims

1. A box-type vacuum fixture, characterized in that: The fixture includes a fixture base, a fixture top cover covering the top of the fixture base, and a sealing ring surrounding the fixture base and the fixture top cover. A product limiting support protrudes from the top of the fixture top cover, and a vacuum adsorption mold protrudes from the top of the product limiting support. A first through hole is provided on the side of the fixture base, and a cavity is provided on the top of the fixture base. A second through hole is provided in the middle of the vacuum adsorption mold, penetrating the vacuum adsorption mold, the product limiting support, and the fixture top cover. The second through hole, the cavity, and the first through hole are connected in sequence.

2. The box-type vacuum fixture according to claim 1, characterized in that: The edge of the product limiting support is provided with a limiting groove for matching with the product's mounting post.

3. A box-type vacuum fixture according to claim 1, characterized in that: The top of the fixture base is provided with an annular positioning groove, and the sealing ring abuts against the annular positioning groove.

4. A box-type vacuum fixture according to claim 1, characterized in that: The vacuum adsorption mold includes an adsorption part protruding from the top of the product limiting support, and a product abutment part protruding from the top of the product limiting support and circumferentially surrounding the outer periphery of the adsorption part. The second through hole is opened in the middle of the adsorption part, and the product abutment part is used to abut against the inner surface of the product.

5. A box-type vacuum fixture according to claim 4, characterized in that: The height of the product contact part is higher than the height of the adsorption part.

6. A box-type vacuum fixture according to claim 4, characterized in that: The adsorption section has multiple guide channels, and adjacent guide channels are connected.

7. A box-type vacuum fixture according to claim 6, characterized in that: The second through hole is connected to the guide groove adjacent to the second through hole.

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