A CNC fixing fixture

Abstract

This utility model relates to the field of tooling and fixture technology, and discloses a CNC fixing fixture, comprising: a first base plate with an adsorption groove for vacuum adsorption of workpieces; a drive clamping assembly disposed on the outside of the adsorption groove, which clamps or releases the workpiece in the adsorption groove; and an elastic clamping assembly disposed on the outside of the adsorption groove and elastically connected to the first base plate, which clamps the workpiece in the adsorption groove. This utility model's CNC fixing fixture, through the coordinated clamping and fixing of the drive clamping assembly and the elastic clamping assembly, can improve the clamping accuracy and stability of the fixing fixture, thereby increasing the yield rate of machining.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture technology, specifically relating to a CNC fixing fixture. Background Technology

[0002] CNC engraving machines can perform intricate operations such as engraving complex patterns, cutting irregular edges, and processing surface microstructures according to preset programs, meeting the processing needs of precision parts such as watch case backs. During the CNC engraving process of watch case backs, the case back typically needs to be precisely positioned and fixed on the processing platform using a fixture to ensure the accuracy of the engraving, cutting, and polishing operations.

[0003] The fixing fixture typically includes a base with a vacuum adsorption groove and a vacuum adsorption hole at the bottom of the vacuum adsorption groove. When the watch cover is placed in the vacuum adsorption groove, the base adsorbs the watch cover through the vacuum adsorption hole, thus fixing the watch cover.

[0004] However, the fixing fixture is prone to insufficient vacuum suction force, which can cause the watch cover to shift due to vibration during the processing, resulting in dimensional deviations or surface scratches on the watch cover. Utility Model Content

[0005] To address the shortcomings of the prior art, this utility model provides a CNC fixing fixture in which the workpiece is clamped and fixed by the collaborative clamping components of the drive clamping assembly and the elastic clamping assembly. This helps to improve the problem of workpiece displacement during processing due to insufficient vacuum adsorption force at the adsorption groove, thereby improving the clamping accuracy and stability of the fixing fixture and thus increasing the yield of processed products.

[0006] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0007] This utility model provides a CNC fixing fixture, including a first base plate with an adsorption groove for vacuum adsorption of workpieces; a drive clamping assembly disposed on the outside of the adsorption groove, the drive clamping assembly clamping or releasing the workpiece in the adsorption groove; and an elastic clamping assembly disposed on the outside of the adsorption groove and elastically connected to the first base plate, the elastic clamping assembly clamping the workpiece in the adsorption groove.

[0008] In some implementations, the first substrate is provided with fixing blocks on both sides of the adsorption groove, and the elastic clamping assembly includes an elastic clamping block disposed on the side of the fixing block near the adsorption groove, the elastic clamping block clamping the workpiece in the adsorption groove; and a spring rod disposed between the elastic clamping block and the fixing block, the elastic clamping block pressing the spring rod to clamp the workpiece.

[0009] In some implementations, a limiting groove is formed on the first substrate, and the fixing block, the elastic clamping block and the spring rod are all disposed in the limiting groove, and the limiting groove restricts the movement direction of the elastic clamping block.

[0010] In some implementations, the drive clamping assembly includes drive clamping blocks disposed on both sides of the adsorption groove; and a drive member, which is pulsatorically connected to the drive clamping blocks, the drive member driving the drive clamping blocks to clamp or release the workpiece.

[0011] In some implementations, the elastic clamping block and the driving clamping block are alternately arranged around the adsorption groove.

[0012] In some implementations, both the elastic clamping block and the driving clamping block near the adsorption groove have fitting grooves adapted to the workpiece.

[0013] In some implementations, the first substrate is provided with a positioning block for supporting the workpiece in the adsorption tank. The positioning block has a vacuum hole that communicates with the adsorption tank. The positioning block includes a connecting end that is inserted into the adsorption tank and detachably connected to the first substrate.

[0014] In some implementations, a first magnet is provided on the connecting end, and a second magnet that is magnetically attracted to the first magnet is provided in the adsorption groove.

[0015] In some implementations, the first substrate has a connecting hole on the inner wall of the adsorption tank, the connecting hole is connected to the vacuum hole, and a sealing structure is provided at the connection between the connecting hole and the vacuum hole.

[0016] In some implementations, the positioning block includes a loading end, the workpiece is placed on the loading end, and a shallow groove is formed on the surface of the loading end, the shallow groove being connected to the vacuum hole.

[0017] In summary, this utility model has at least the following advantages:

[0018] The CNC fixture provided by this utility model places the workpiece to be processed in the adsorption tank, where it is vacuum-adsorbed. An elastic clamping component holds the workpiece in place. After initial fixation by the adsorption tank and the elastic clamping component, the workpiece is then clamped tightly by a driving clamping component. The elastic clamping component and the driving clamping component work synergistically with the vacuum adsorption of the adsorption tank, enabling the workpiece to achieve center self-positioning. This dual fixation of the workpiece by the elastic clamping component and the driving clamping component helps reduce the impact of machining vibrations on the workpiece, improves clamping accuracy and machining stability, and thus increases the yield rate of the machined workpiece. Compared with traditional fixtures, it can improve the problem of workpiece misalignment during machining caused by insufficient vacuum adsorption force in the adsorption tank. Attached Figure Description

[0019] Figure 1 This is an exploded view of a CNC fixing fixture according to a specific embodiment of the present invention.

[0020] Figure 2 This is a structural schematic diagram of a CNC fixing fixture according to a specific embodiment of the present utility model.

[0021] Figure 3 This is a top view of a CNC fixing fixture according to a specific embodiment of the present utility model.

[0022] Figure 4 for Figure 3 A cross-sectional view of the overall structure along plane AA.

[0023] Figure 5 This is a schematic diagram of the structure of the drive clamping assembly, the elastic clamping assembly, and the positioning block in a specific embodiment of this utility model.

[0024] Figure 6 This is a top view of the positioning block in a specific embodiment of the present utility model.

[0025] Figure 7 for Figure 6 A cross-sectional view of the overall structure from the BB plane.

[0026] Marked in the image:

[0027] 1. First substrate; 11. Adsorption groove; 111. Second magnet; 112. Connecting hole; 113. Sealing structure; 12. Fixing block; 13. Limiting groove; 14. First regulating valve; 2. Drive clamping assembly; 21. Drive clamping block; 22. Drive component; 23. Fitting groove; 3. Elastic clamping assembly; 31. Elastic clamping block; 311. Clearance groove; 32. Spring rod; 4. Positioning block; 41. Vacuum hole; 42. Connecting end; 43. First magnet; 44. Loading end; 45. Shallow groove; 5. Second substrate; 51. Support column; 6. Workpiece. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] Example 1:

[0031] Please see Figure 1 The CNC fixing fixture of this utility model can be used in CNC engraving machines to position workpieces 6 such as watch cover plates made of glass, sapphire, and ceramic materials. The positioning accuracy and stability of workpiece 6 are high.

[0032] The CNC fixture of this utility model includes a first base plate 1, on which an adsorption groove 11 for vacuum adsorption of a workpiece 6 is formed.

[0033] The first substrate 1 is provided with an elastic clamping component 3 on the outside of the adsorption tank 11. The elastic clamping component 3 clamps the workpiece 6 in the adsorption tank 11. The first substrate 1 is provided with a driving clamping component 2 on the outside of the adsorption tank 11. The driving clamping component 2 clamps or releases the workpiece 6 in the adsorption tank 11.

[0034] Before the workpiece 6 is precision-carved, the workpiece 6 to be processed is placed in the adsorption tank 11. The adsorption tank 11 vacuum adsorbs the workpiece 6. At the same time, the elastic clamping component 3 elastically clamps the workpiece 6, and the workpiece 6 is initially positioned. The driving clamping component 2 clamps the workpiece 6. Through vacuum adsorption, the elastic clamping component 3 and the driving clamping component 2 are combined to fix the workpiece 6 stably in the adsorption tank 11.

[0035] Traditional fixtures fix workpiece 6 using a single adsorption method. Vacuum adsorption requires a high degree of surface flatness for workpiece 6. If workpiece 6 has slight curvature or burrs, air leakage can easily lead to adsorption failure or insufficient adsorption force, causing workpiece 6 to shift position during subsequent processing and affecting the processing effect. Based on the vacuum adsorption of workpiece 6 in the adsorption tank 11, workpiece 6 works collaboratively with the elastic clamping component 3 and the drive clamping component 2. This helps solve the problem of poor positioning stability of workpiece 6, improves clamping accuracy, and ensures workpiece 6 is stably fixed in the adsorption tank 11. This reduces the impact of processing vibration on accuracy and improves the yield rate of workpiece 6.

[0036] Example 2:

[0037] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the elastic clamping component 3 and the driving clamping component 2 of this utility model. Please refer to [link to relevant documentation]. Figures 1-4 .

[0038] Please see Figure 2 and Figure 4 In this embodiment, a fixing block 12 is provided on the first substrate 1. Specifically, there are two fixing blocks 12, which are symmetrically arranged on the outside of the adsorption tank 11.

[0039] The elastic drive assembly includes an elastic clamping block 31, which is located on the side of the fixed block near the adsorption groove 11. The elastic clamping block 31 clamps the workpiece 6 in the adsorption groove 11. A spring rod 32 is provided between the elastic clamping block 31 and the fixed block 12. The elastic clamping block 31 compresses the spring rod 32, and the elastic clamping block 31 clamps the workpiece 6 under the elastic force of the spring rod 32. Specifically, one end of the spring rod 32 is detachably connected to the fixed block 12, and the other end passes through the elastic clamping block, pushing the elastic clamping block 31 to move towards the fixed block 12. The elastic clamping block 31 compresses the spring rod 32. The elastic drive assembly has a simple structure and is easy to operate.

[0040] In some specific embodiments, a limiting groove 13 is formed on the first substrate 1, and the fixing block 12, the elastic clamping block 31 and the spring rod 32 are all disposed in the limiting groove 13. The fixing block 12 can be detachably connected to the first substrate 1 in the limiting groove 13. Specifically, the fixing block 12 and the first substrate 1 are assembled by screws. The elastic clamping block 31 is slidably disposed in the limiting groove 13. The limiting groove 13 can restrict the movement direction of the elastic clamping block 31, which is beneficial to the precise fixing of the workpiece 6.

[0041] In a preferred embodiment, the drive clamping assembly 2 includes drive clamping blocks 21, which are disposed on both sides of the adsorption groove 11. Driven components 22 are drively connected to the drive clamping blocks 21, and the drive components 22 drive the clamping blocks 21 to clamp or release the workpiece 6. Specifically, the drive component 22 preferably, but not limited to, is a bidirectional sliding finger cylinder, which drives the two drive clamping blocks 21 to move closer or further apart. Specifically, a sliding hole is provided on the first substrate 1, and the drive clamping blocks 21 are slidably disposed within the sliding hole. The sliding hole restricts the movement direction of the drive clamping blocks 21, improving clamping stability.

[0042] Please see Figure 1 and Figure 3 In some specific embodiments, the elastic clamping block 31 and the driving clamping block 21 are alternately arranged around the adsorption groove 11. When the workpiece 6 is placed in the adsorption groove 11, the elastic clamping block 31 and the driving clamping block 21 surround the outside of the workpiece 6, which helps to improve the stability of the workpiece 6 clamping.

[0043] Furthermore, both the elastic clamping block 31 and the driving block near the adsorption groove 11 are provided with fitting grooves 23 adapted to the workpiece 6. When the elastic clamping block 31 and the driving block clamp the workpiece 6, the fitting grooves 23 fit the workpiece 6, which is beneficial for the stable clamping of the workpiece 6. Specifically, the driving clamping block 21 has a clearance groove 311 on the inner wall of the fitting groove 23. The clearance groove 311 is provided to facilitate the placement or removal of the workpiece 6.

[0044] The elastic clamping component 3 and the drive clamping component 2 are highly compatible with the workpiece 6 and can clamp the workpiece 6 stably, which can meet the precision machining requirements of CNC engraving machines.

[0045] Example 3:

[0046] The difference between this embodiment and the above embodiments is that this embodiment further optimizes the structure of the adsorption tank 11 of this utility model. Please refer to [link to relevant documentation]. Figure 1 , Figures 5-7 .

[0047] Please see Figure 1 and Figure 6 The adsorption tank 11 of this invention is provided with a positioning block 4 for supporting the workpiece 6. A driving clamping block 21 and an elastic clamping block 31 surround the positioning block 4 to cooperate in clamping the workpiece 6 supported on the positioning block 4. A vacuum hole 41 is provided on the positioning block 4, which communicates with the adsorption tank 11. In this invention, a combination of... Figure 5 The positioning block 4 includes a connecting end 42, which is inserted into the adsorption groove 11 and detachably connected to the first substrate 1.

[0048] Please see Figure 1 and Figure 7 In a preferred embodiment, a first magnet 43 is provided on the connecting end 42, and the first magnet 43 is detachably connected to the connecting end 42. Specifically, the first magnet 43 can be assembled to the connecting end 42 by screws. A second magnet 111 is provided in the adsorption groove 11, and the second magnet 111 is magnetically attracted to the first magnet 43. The positioning block 4 can be quickly replaced. The fixing fixture of this embodiment adopts a modular design, and the positioning block 4 can be quickly replaced to adapt to workpieces 6 of different sizes. Replacing the positioning block 4 when processing workpieces 6 of different specifications and sizes helps to reduce fixture development costs and shorten the design cycle. Moreover, the positioning block 4 is easy to replace, which can improve production efficiency.

[0049] In some specific embodiments, the inner wall of the adsorption tank 11 is inclined, the connecting end 42 is adapted to the adsorption tank 11, and the adsorption tank 11 is an open groove, which is conducive to the quick replacement of the positioning block 4 and improves the flexibility of use.

[0050] Combination Figure 5Furthermore, the positioning block 4 includes a loading end 44, where the workpiece 6 is placed. The surface of the loading end 44 is provided with a shallow groove 45. Specifically, the shallow groove 45 can be a grid-shaped groove. It is understood that this is not a specific limitation on the shape of the shallow groove 45. Those skilled in the art can make improvements and replacements according to the specifications of the workpiece 6.

[0051] The shallow groove 45 is connected to the vacuum hole 41. In some specific embodiments, a connecting hole 112 is provided on the inner wall of the adsorption tank 11. A first regulating valve 14 is provided on the first substrate 1, and the first regulating valve 14 is connected to the connecting hole 112. When an air pipe is connected to the first regulating valve 14, the air pipe evacuates the connecting hole 112 through the first regulating valve 14, and the connecting hole 112 is connected to the vacuum hole 41 to achieve vacuum adsorption of the workpiece 6. The shallow groove 45 is beneficial to increasing the vacuum adsorption area of ​​the workpiece 6 on the loading end 44, which is beneficial to improving the stability of the workpiece 6. Specifically, a sealing structure 113 is provided at the connection between the connecting hole 112 and the vacuum hole 41. The sealing structure 113 is preferably a sealing ring, which is beneficial to ensuring the adsorption force of the positioning block 4 on the workpiece 6.

[0052] In a preferred embodiment, a second substrate 5 may be provided at the bottom of the first substrate 1. The second substrate 5 is connected to the worktable of the CNC engraving machine. A support column 51 is provided between the second substrate 5 and the first substrate 1. The support column 51 is connected to the first substrate 1 and to the second substrate 5 by bolts. The driving component 22 is provided on the second substrate 5 to form a stable frame and ensure the overall rigidity of the CNC fixing fixture.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.

[0054] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to 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. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0055] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0056] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0057] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A CNC fixing fixture, characterized in that, include The first substrate (1) has an adsorption groove (11) for vacuum adsorption of workpiece (6); A drive clamping assembly (2) is disposed outside the adsorption groove (11), and the drive clamping assembly (2) clamps or releases the workpiece (6) in the adsorption groove (11); and An elastic clamping assembly (3) is disposed on the outside of the adsorption groove (11) and is elastically connected to the first substrate (1). The elastic clamping assembly (3) clamps the workpiece (6) in the adsorption groove (11).

2. The CNC fixing fixture according to claim 1, characterized in that, The first substrate (1) has fixing blocks (12) on both sides of the adsorption groove (11), and the elastic clamping assembly (3) includes An elastic clamping block (31) is disposed on the side of the fixed block (12) near the adsorption groove (11), and the elastic clamping block (31) clamps the workpiece (6) in the adsorption groove (11); and A spring rod (32) is disposed between the elastic clamping block (31) and the fixed block (12), and the elastic clamping block (31) presses the spring rod (32) to clamp the workpiece (6).

3. The CNC fixing fixture according to claim 2, characterized in that, A limiting groove (13) is formed on the first substrate (1). The fixing block (12), the elastic clamping block (31) and the spring rod (32) are all disposed in the limiting groove (13). The limiting groove (13) restricts the movement direction of the elastic clamping block (31).

4. The CNC fixing fixture according to claim 2, characterized in that, The drive clamping assembly (2) includes Drive clamps (21) are provided on both sides of the adsorption groove (11); as well as The driving component (22) is connected to the driving clamp (21) in a transmission manner, and the driving component (22) drives the driving clamp (21) to clamp or release the workpiece (6).

5. The CNC fixing fixture according to claim 4, characterized in that, The elastic clamp (31) and the driving clamp (21) are alternately arranged around the adsorption groove (11).

6. The CNC fixing fixture according to claim 5, characterized in that, The elastic clamping block (31) on the side near the adsorption groove (11) and the driving clamping block (21) on the side near the adsorption groove (11) are both provided with fitting grooves (23) that are adapted to the workpiece (6).

7. The CNC fixing fixture according to claim 1, characterized in that, The first substrate (1) is provided with a positioning block (4) for supporting the workpiece (6) in the adsorption tank (11). The positioning block (4) is provided with a vacuum hole (41) and the vacuum hole (41) is connected to the adsorption tank (11). The positioning block (4) includes a connecting end (42) which is inserted into the adsorption tank (11) and detachably connected to the first substrate (1).

8. The CNC fixing fixture according to claim 7, characterized in that, A first magnet (43) is provided on the connecting end (42), and a second magnet (111) is provided in the adsorption groove (11) that is magnetically attracted to the first magnet (43).

9. The CNC fixing fixture according to claim 7, characterized in that, The first substrate (1) has a connecting hole (112) on the inner wall of the adsorption tank (11), the connecting hole (112) is connected to the vacuum hole (41), and a sealing structure (113) is provided at the connection between the connecting hole (112) and the vacuum hole (41).

10. The CNC fixing fixture according to claim 7, characterized in that, The positioning block (4) includes a loading end (44), the workpiece (6) is placed on the loading end (44), and a shallow groove (45) is formed on the surface of the loading end (44), the shallow groove (45) is connected to the vacuum hole (41).

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