Vacuum suction jig for cutting a plate

Abstract

The utility model relates to the technical field of auxiliary jig used in machining process, especially relates to a vacuum suction jig for plate cutting, including bottom plate, sealing washer and a plurality of spacers, the upper surface of bottom plate is equipped with annular groove, locating post, air hole and recess, annular groove is closed, locating post is located at the outside of annular groove, and locating post is set apart with annular groove, air hole is along the thickness direction of bottom plate and penetrates bottom plate, recess is communicated with air hole, recess is located at the inside of annular groove, and recess is independently set with annular groove, sealing washer is located in annular groove, spacer is located in recess, and the interval of two adjacent spacers is set, and the interval of spacer and air hole is set, realize the vacuum adsorption purpose of flat plate blank, the setting of spacer plays the supporting purpose to flat plate blank, effectively prevents the problem of bending deformation due to vacuum adsorption, that is, ensures the stability of workpiece machining quality, satisfies production requirement.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary fixtures used in machining processes, and in particular to a vacuum suction fixture for cutting sheet metal. Background Technology

[0002] like Figure 5 As shown, the flat blank 100 includes a blank body 101 and a film layer 102. The film layer 102 is attached to the bottom surface of the blank body 101. The blank body 101 needs to be processed into several workpieces 103. Traditionally, the flat blank 100 is fixed by vacuum adsorption. However, this fixing method causes deformation of the flat blank 100 during the processing. The deformation is mainly manifested as the two ends of the flat blank 100 in the length direction bending upwards and the middle part of the flat blank 100 bending downwards. This results in errors in the processed workpieces 103, affects the stability of the processing quality, and cannot meet the production requirements. Improvement is needed. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology that uses vacuum adsorption to fix the blank, resulting in unstable workpiece processing quality, the purpose of this utility model is to provide a vacuum suction fixture for cutting sheet metal, which avoids the problem of deformation of flat blanks during processing and improves the stability of workpiece forming quality.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A vacuum suction fixture for cutting sheet metal includes a base plate, a sealing ring, and several pads; The base plate is provided with an annular groove and a positioning post. The annular groove is recessed in the upper surface of the base plate and is closed. The positioning post is fixed to the upper surface of the base plate and protrudes from the upper surface of the base plate. The positioning post is located outside the annular groove and the distance between the positioning post and the annular groove is set. The base plate is also provided with air holes and grooves. The air holes penetrate the base plate along the thickness direction. The grooves are recessed on the upper surface of the base plate and communicate with the air holes. The grooves are located inside the annular grooves and are independently set by the grooves and the annular grooves. The sealing ring is disposed within the annular groove; The pad is disposed in the groove, the distance between two adjacent pads is set, and the distance between the pad and the air hole is set.

[0005] Furthermore, the pad includes a rigid layer and a soft rubber layer. The rigid layer is fixedly connected to the base plate, and the soft rubber layer is fixed to the rigid layer and disposed away from the base plate.

[0006] Furthermore, the pad is L-shaped.

[0007] Furthermore, the pad is in the shape of a straight strip.

[0008] Furthermore, the upper surface of the pad is flush with the upper surface of the base plate.

[0009] Furthermore, the rigid layer is integrally formed with the base plate.

[0010] The beneficial effects of this utility model are as follows: By machining an annular groove, positioning post, air hole and groove on the upper surface of the base plate, the sealing ring is installed in the annular groove and several pads are set in the groove. When processing the flat blank, the flat blank and the sealing ring are attached to each other, so that the groove forms an independent space. The gas in the groove flows out through the air hole and the groove is in a negative pressure state, so as to achieve the purpose of vacuum adsorption of the flat blank. The pads are set to support the flat blank and effectively prevent the problem of bending deformation caused by vacuum adsorption, that is, to ensure the stability of the workpiece processing quality and meet the production requirements. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 This is a three-dimensional sectional view of the present invention; Figure 4 for Figure 3 A magnified schematic diagram of part A in the middle section; Figure 5 This is a schematic diagram of the flat blank to be processed and the workpiece structure.

[0012] The reference numerals in the figures include: 1—Base plate 111—Annular groove 112—Positioning post 121—Air hole; 122—Groove; 2—Sealing ring 3—Plate 31—Rigid layer 32—Soft rubber layer 100—Flat billet; 101—Bill body; 102—Film layer 103—Workpiece. Detailed Implementation

[0013] 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.

[0014] Please see Figures 1 to 3 The present invention provides a vacuum suction fixture for cutting sheet metal, comprising a base plate 1, a sealing ring 2, and several pads 3; The base plate 1 is provided with an annular groove 111 and a positioning post 112. The annular groove 111 is recessed on the upper surface of the base plate 1 and is closed. The positioning post 112 is fixed on the upper surface of the base plate 1 and protrudes from the upper surface of the base plate 1. The positioning post 112 is located outside the annular groove 111 and the positioning post 112 is spaced apart from the annular groove 111. The base plate 1 is also provided with an air hole 121 and a groove 122. The air hole 121 penetrates the base plate 1 along the thickness direction of the base plate 1. The groove 122 is recessed on the upper surface of the base plate 1 and communicates with the air hole 121. The groove 122 is located inside the annular groove 111. The groove 122 and the annular groove 111 are independently provided. The sealing ring 2 is disposed in the annular groove 111; The pad 3 is disposed in the groove 122, and the distance between two adjacent pads 3 is set. The distance between the pad 3 and the air hole 121 is set. The distance between two adjacent pads 3 is less than the width of any one of the pads 3.

[0015] Specifically, in this embodiment, the base plate 1 is made of stainless steel and is rectangular in shape. An annular groove 111, a positioning post 112, an air hole 121, and a groove 122 are machined on the upper surface of the base plate 1. The sealing ring 2 is installed in the annular groove 111, which is closed. The annular groove 111 and the groove 122 are spaced apart. Preferably, several pads 3 are placed in the groove 122, with a spacing between adjacent pads 3. The spacing between adjacent pads 3 forms an air passage, and the air hole 121 communicates with the air passage. The working principle is as follows: A flat blank 100 is placed on the upper surface of the base plate 1, with the film layer 102 of the flat blank 100 placed close to the groove 122. The flat blank 100 has four limiting holes and one positioning post 11. 2. The flat blank 100 is pre-fixed to the base plate 1 through a limiting hole. The upper surface of the sealing ring 2 abuts against the lower surface of the external flat blank 100, so that the groove 122 forms an independent space. The air hole 121 is connected to the external vacuum pump. The gas in the groove 122 is extracted through the air hole 121, and the bottom surface of the flat blank 100 forms a negative pressure, so as to fix the flat blank 100. Several pads 3 are placed in the groove 122. When the groove 122 is in a negative pressure state, the pads 3 support the bottom of the external flat blank 100, effectively preventing the possibility of deformation of the flat blank 100, thereby ensuring the stability of the processing quality of the workpiece 103. After processing, several workpieces 103 with film layer 102 are taken out and transferred to the next station.

[0016] By machining an annular groove 111, positioning post 112, air hole 121, and groove 122 on the upper surface of the base plate 1, the sealing ring 2 is installed in the annular groove 111, and several pads 3 are set in the groove 122. When machining the flat blank 100, the flat blank 100 fits with the sealing ring 2, making the groove 122 an independent space. The gas in the groove 122 flows out through the air hole 121, and the groove 122 is in a negative pressure state, which realizes the purpose of vacuum adsorption of the flat blank 100. The pads 3 are set to support the flat blank 100, effectively preventing the problem of bending deformation caused by vacuum adsorption, that is, ensuring the stability of the machining quality of the workpiece 103 and meeting the production requirements.

[0017] The pad 3 includes a rigid layer 31 and a soft rubber layer 32. The rigid layer 31 is fixedly connected to the base plate 1, and the soft rubber layer 32 is fixed to the rigid layer 31 and is positioned away from the base plate 1. The rigid layer 31 is made of stainless steel, and the soft rubber layer 32 is a sheet made of plastic material. The soft rubber layer 32 adheres to the surface of the rigid layer 31. The combination of the soft rubber layer 32 and the rigid layer 31 gives the pad 3 strong support and elasticity. While supporting the flat blank 100, it also provides elastic buffering for the flat blank 100, preventing the rigid layer 31 from creating indentations on the bottom surface of the flat blank 100 when the negative pressure value in the groove 122 is too large, thus affecting the processing quality of the workpiece 103.

[0018] The pad 3 is L-shaped and straight. The straight pad 3 is located at the center of the groove 122. There are multiple L-shaped pads 3, which are symmetrically arranged on opposite sides of the straight pad 3. This structure provides balanced support for the bottom of the flat blank 100, that is, the bottom single-sided area of ​​the flat blank 100 is subjected to the same supporting force.

[0019] The upper surface of the pad 3 is flush with the upper surface of the base plate 1, further ensuring the effective support of the pad 3 for the flat blank 100.

[0020] The rigid layer 31 is integrally formed with the base plate 1. This structure makes the connection structure between the rigid layer 31 and the base plate 1 stable, further improving the controllability of production quality.

[0021] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A vacuum suction fixture for cutting sheet metal, characterized in that: Includes a base plate (1), a sealing ring (2), and several gaskets (3); The base plate (1) is provided with an annular groove (111) and a positioning post (112). The annular groove (111) is recessed on the upper surface of the base plate (1) and is closed. The positioning post (112) is fixed on the upper surface of the base plate (1) and protrudes from the upper surface of the base plate (1). The positioning post (112) is located outside the annular groove (111) and the positioning post (112) is spaced apart from the annular groove (111). The base plate (1) is also provided with an air hole (121) and a groove (122). The air hole (121) penetrates the base plate (1) along the thickness direction. The groove (122) is recessed on the upper surface of the base plate (1). The groove (122) communicates with the air hole (121). The groove (122) is located inside the annular groove (111). The groove (122) and the annular groove (111) are independently provided. The sealing ring (2) is disposed in the annular groove (111); The pad (3) is disposed in the groove (122), the spacing between two adjacent pads (3) is set, the spacing between the pad (3) and the air hole (121) is set, and the spacing between two adjacent pads (3) is less than the width of any one of the pads (3).

2. The vacuum suction fixture for cutting sheet metal according to claim 1, characterized in that: The pad (3) includes a hard layer (31) and a soft rubber layer (32). The hard layer (31) is fixedly connected to the base plate (1), and the soft rubber layer (32) is fixed to the hard layer (31). The soft rubber layer (32) is disposed away from the base plate (1).

3. The vacuum suction fixture for cutting sheet metal according to claim 1, characterized in that: The pad (3) is L-shaped.

4. The vacuum suction fixture for cutting sheet metal according to claim 1, characterized in that: The pad (3) is in the shape of a straight strip.

5. The vacuum suction fixture for cutting sheet metal according to claim 1, characterized in that: The upper surface of the pad (3) is flush with the upper surface of the base plate (1).

6. The vacuum suction fixture for cutting sheet metal according to claim 2, characterized in that: The hard layer (31) is integrally formed with the base plate (1).

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