Thin-walled product positioning tool

Abstract

The utility model provides a kind of thin-walled product positioning tool, it is related to thin-walled product processing technical field, including workbench, the workbench top is equipped with support assembly, multiple lifting assemblies are symmetrically set in support assembly two sides, lifting assembly output end connects pressure mechanism.The support assembly has the support surface compatible with product bottom contour, and the pressure mechanism includes the pressure block matched with product top contour.The utility model design is reasonable, by setting the support surface and pressure surface compatible with product contour, combined with the multiple lifting assemblies arranged around, the uniform clamping of thin-walled product in multiple directions is realized, effectively disperses clamping force and cutting force, significantly inhibits deformation and vibration in processing process, while using the pressure block of flexible material avoids product surface damage, improves processing precision and production efficiency.

Description

Technical Field

[0001] This utility model mainly relates to the field of thin-walled product processing technology, specifically to a positioning tooling for thin-walled products. Background Technology

[0002] Thin-walled product positioning fixtures are specialized jigs used in CNC machining to fix thin-walled structural components (such as aerospace components and precision instrument housings). Their working principle is primarily based on multi-point, uniform constraint and clamping of the product. The fixture provides support by adhering its support surface to the bottom of the product, and applies clamping force through side clamping mechanisms, thereby overcoming cutting forces and vibrations during machining and ensuring the product's positional stability.

[0003] During the implementation of specific embodiments, the applicant discovered the following defects: Due to the inherent low rigidity of thin-walled parts, traditional rigid clamping methods easily lead to localized stress concentration when applying locking force. Under the combined action of cutting forces, the product may undergo elastic deformation or tool deflection, making it difficult to guarantee dimensional and positional tolerances after machining, resulting in a low product yield. Existing fixtures often use clamping blocks made of hard materials such as metals, which are prone to leaving indentations or scratches on the product surface when in direct contact with it and under significant pressure. This is especially problematic for soft materials or products with high surface finishes, such as aluminum and composite materials, causing additional quality damage. For products with complex contours, existing tooling often employs a full-contour design, resulting in high manufacturing costs, long lead times, and poor adaptability to tolerances across different batches. Furthermore, the inconvenience in adjusting the number and position of lateral clamping points leads to low clamping efficiency for different product models and long changeover preparation times. Utility Model Content

[0004] 1. The technical problem to be solved by the utility model: This utility model provides a thin-walled product positioning fixture to solve the technical problems existing in the background art.

[0005] 2. Technical Solution: To achieve the above objectives, the technical solution provided by this utility model is: a thin-walled product positioning fixture, including a worktable; A support assembly is disposed on the top of the workbench for supporting the product, and has a support surface adapted to the bottom shape of the product; Multiple lifting components are symmetrically arranged on opposite sides of the support component; and A clamping mechanism, which is connected to the output end of the lifting assembly; The lifting assembly is used to drive the pressing mechanism to move in the vertical direction, so that the pressing mechanism presses against the top of the product, thereby clamping and fixing the product together with the support assembly.

[0006] During operation, the support components are fixedly installed on the top surface of the workbench, conforming to the bottom shape of the thin-walled product to be processed, in order to provide stable and uniform load-bearing capacity.

[0007] Multiple lifting components are symmetrically and spaced apart on the worktable via corresponding mounting bases and are located on both sides of the support component.

[0008] The clamping mechanism is fixedly connected to the output end of the lifting assembly. This clamping mechanism includes a clamping block, the bottom surface of which is configured to match the shape of the top of the product. Preferably, the clamping block is made of a non-metallic flexible material such as nylon to effectively transmit clamping force while avoiding damage to the product surface.

[0009] During operation, the operator first places the thin-walled product on the support surface of the support assembly. Then, all lifting components are activated, their output ends moving downwards synchronously, causing the clamping mechanism to move downwards as a whole until the bottom surface of the clamping block is evenly pressed against the predetermined position on the top of the product. Through the bottom-up support of the support surface and the top-down clamping of the clamping surface, the product is reliably fixed in the predetermined position, thus providing a solid guarantee for subsequent machining operations and effectively preventing displacement and deformation during processing.

[0010] Furthermore, the lifting assembly adopts a linear drive device, which is a cylinder, a hydraulic cylinder, or an electric push rod.

[0011] Furthermore, the support assembly includes multiple independently arranged support blocks, which are detachably connected to the worktable, and the upper surfaces of each support block together form a support surface that is adapted to the bottom shape of the product.

[0012] Furthermore, the support assembly has a pair of negative pressure adsorption holes; a negative pressure generating device is provided at the bottom of the workbench, and the negative pressure generating device is connected to the negative pressure adsorption holes through a pipeline.

[0013] Furthermore, a sealing groove is formed around the negative pressure adsorption hole on the support block, and a sealing ring is provided in the sealing groove.

[0014] Furthermore, the clamping mechanism includes a connecting block and a clamping block; one end of the connecting block is fixedly connected to the output end of the lifting assembly; the clamping block is detachably installed on the other end of the connecting block.

[0015] Furthermore, the clamping block is made of nylon.

[0016] Furthermore, the lifting assembly is provided with 15 units, of which 7 are symmetrically arranged on each side of the product and 1 is arranged at the end of the product.

[0017] Furthermore, a storage box is provided at the bottom of the workbench.

[0018] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this utility model has the following advantages: This utility model features a reasonable design. By setting support and clamping surfaces that match the product's shape, combined with multiple lifting components arranged around the perimeter, it achieves multi-directional and uniform clamping of thin-walled products. This design effectively disperses clamping and cutting forces, significantly suppressing deformation and vibration during processing and ensuring machining accuracy. Simultaneously, the use of vacuum adsorption-assisted fixing and nylon clamping blocks enhances clamping stability and prevents damage to the product surface.

[0019] This tooling features a modular design, allowing for quick replacement of both support and clamping blocks. The bottom storage box facilitates component management, significantly improving tooling adaptability and changeover efficiency. The overall structure is rationally laid out and easy to operate, significantly increasing production efficiency while ensuring processing quality. It is particularly suitable for the batch precision processing of thin-walled products.

[0020] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention during operation; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This utility model Figure 2 A magnified structural diagram at point A; Figure 4 This is a schematic diagram of the structure of the product to be processed according to this utility model.

[0022] Figure label: 1. Workbench; 2. Support assembly; 21. Support block; 22. Negative pressure adsorption hole; 23. Negative pressure generating device; 24. Sealing groove; 3. Lifting assembly; 4. Pressing mechanism; 41. Connecting block; 42. Pressing block; 5. Storage box. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0027] It should be noted that the structures not described in this utility model do not involve the design points and improvement directions of this utility model, and can all adopt existing technologies known to those skilled in the art.

[0028] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0029] See attached document Figure 1-4 A thin-walled product positioning fixture, including a worktable 1; Support component 2, which is disposed on the top of the workbench 1 and is used to support the product, has a support surface adapted to the bottom shape of the product; Multiple lifting components 3 are symmetrically arranged on opposite sides of the support component 2; and A clamping mechanism 4 is connected to the output end of the lifting assembly 3; The lifting component 3 is used to drive the pressing mechanism 4 to move in the vertical direction, so that the pressing mechanism 4 presses against the top of the product, thereby clamping and fixing the product together with the support component 2.

[0030] In this embodiment, the support component 2 is fixedly installed on the top surface of the workbench 1 and fits into the bottom shape of the thin-walled product to be processed, so as to provide stable and uniform load-bearing capacity.

[0031] Multiple lifting components 3 are symmetrically and spaced apart on the worktable 1 via corresponding mounting bases and are located on both sides of the support component 2.

[0032] The clamping mechanism 4 is fixedly connected to the output end of the lifting assembly 3. The clamping mechanism 4 includes a clamping block 42, the bottom surface of which is constructed to match the top shape of the product. Preferably, the clamping block 42 can be made of a non-metallic flexible material such as nylon to effectively transmit the clamping force while avoiding damage to the product surface.

[0033] During operation, the operator first places the thin-walled product on the support surface of the support component 2. Then, all lifting components 3 are activated, their output ends moving downwards synchronously, causing the clamping mechanism 4 to move downwards as a whole until the bottom surface of the clamping block 42 is evenly pressed against the predetermined position on the top of the product. Through the support from bottom to top by the support surface and the clamping from top to bottom by the clamping surface, the product is reliably fixed in the predetermined position, thus providing a solid guarantee for subsequent machining operations and effectively preventing displacement and deformation during processing.

[0034] The lifting assembly 3 employs a linear drive device, which can be a cylinder, hydraulic cylinder, or electric push rod. In this embodiment, when the lifting assembly 3 is activated, its output end retracts downward, thereby driving the connected clamping mechanism 4 to move downward synchronously, achieving clamping and fixing of the product. When processing is complete and unloading is required, the output end of the lifting assembly 3 extends upward, driving the clamping mechanism 4 to lift, thereby releasing the constraint on the product. This driving method offers rapid response, convenient control, and improves clamping efficiency.

[0035] The support assembly 2 includes multiple independently arranged support blocks 21, which are detachably connected to the worktable 1. The upper surfaces of each support block 21 together form a support surface adapted to the bottom shape of the product. In this embodiment, the support assembly 2 is composed of multiple independent support blocks 21. These support blocks 21 are arranged at intervals on the top of the worktable 1 and are detachably fixed to the worktable 1 by bolt connection. The upper surface of each support block 21 is precision machined, and its contour is configured to match the shape of the key support area of ​​the bottom of the thin-walled product to be processed, thereby forming a stable and continuous contoured support surface.

[0036] The segmented support structure design provides effective support under areas prone to deformation, taking into account the structural characteristics of the product, while also facilitating the manufacturing and maintenance of the tooling. By adjusting the specific installation position of each support block 21, the tooling also possesses a certain degree of adaptability and can be used to support a series of products of different specifications.

[0037] The support component 2 has a pair of negative pressure adsorption holes 22; a negative pressure generating device 23 is provided at the bottom of the workbench 1, and the negative pressure generating device 23 is connected to the negative pressure adsorption holes 22 through a pipeline. In this embodiment, the negative pressure adsorption holes 22 of the support component 2 are preferably located in a relatively flat area on the upper surface of the support block 21. The negative pressure generating device 23, such as a vacuum pump or vacuum generator, is installed inside or at the bottom of the workbench 1. The negative pressure generating device 23 is connected to the negative pressure adsorption holes 22 through a pipeline channel provided inside the workbench 1, thereby forming a vacuum adsorption system.

[0038] During operation, once the product is placed on the support surface of the support assembly 2, the negative pressure generating device 23 is activated. This system extracts gas from the cavity between the product and the support surface through the negative pressure adsorption hole 22, creating a localized vacuum environment. Atmospheric pressure is then used to firmly adsorb the product onto the support surface. This design provides additional, evenly distributed adsorption and fixing force, which, in conjunction with the mechanical clamping force of the clamping mechanism 4, further suppresses micro-displacement and vibration that may occur during the processing of thin-walled products. It is particularly suitable for precision machining processes where high stability is required.

[0039] A sealing groove 24 is formed around the negative pressure adsorption hole 22 on the support block 21, and a sealing ring is disposed in the sealing groove 24. In this embodiment, a sealing groove 24 surrounding the negative pressure adsorption hole 22 is also machined on the support surface of the support block 21 in the area where the negative pressure adsorption hole 22 is formed. The sealing groove 24 is fitted with a sealing ring, which is preferably made of a material with good elasticity and sealing performance, such as rubber or silicone.

[0040] When the product is placed on the support surface and negative pressure adsorption is initiated, the sealing ring is compressed and fills the space between the product surface and the sealing groove 24, thereby forming a reliable sealing area around the negative pressure adsorption hole 22. This design effectively prevents external air from leaking from around the negative pressure adsorption hole 22, significantly improving the sealing efficiency and retention capability of the vacuum adsorption system, and ensuring that the product can be more stably and firmly adsorbed onto the support surface.

[0041] The clamping mechanism 4 includes a connecting block 41 and a clamping block 42. One end of the connecting block 41 is fixedly connected to the output end of the lifting assembly 3. The clamping block 42 is detachably installed on the other end of the connecting block 41. In this embodiment, the clamping mechanism 4 is specifically composed of the connecting block 41 and the clamping block 42. The upper end of the connecting block 41 is rigidly fixed to the output end of the lifting assembly 3 by a threaded connection, thereby reliably transmitting the linear motion of the lifting assembly 3 to the entire clamping mechanism 4.

[0042] The clamping block 42 is detachably installed at the lower end of the connecting block 41 via a threaded connection. The bottom surface of the clamping block 42 is constructed as a clamping surface, and its shape matches the contour of the part of the product to be clamped. This modular design allows the clamping block 42 to be quickly replaced according to the contour shape of different products, enhancing the versatility and adaptability of the tooling, while also facilitating the maintenance and replacement of worn parts.

[0043] The clamping block 42 is made of nylon. In this embodiment, the clamping block 42 is preferably made of flexible non-metallic materials such as nylon. This material selection can provide sufficient clamping force to the product surface and effectively avoid scratches or indentations on the product surface during the clamping process.

[0044] The lifting assembly 3 comprises 15 units, with 7 symmetrically arranged on each side of the product and 1 unit at the end of the product. In this embodiment, the lifting assembly 3 adopts a multi-point surrounding layout design, enabling the clamping mechanism 4 connected to the output end of each lifting assembly 3 to simultaneously apply clamping force from multiple sides and ends of the product. This layout ensures that the clamping force is evenly distributed around the product, forming a stable multi-point clamping, thereby effectively resisting cutting forces from different directions, significantly improving the clamping stability and vibration resistance of thin-walled products under complex processing conditions, and further suppressing processing deformation.

[0045] The bottom of the workbench 1 is provided with a storage box 5. In this embodiment, the storage box 5 has an independent storage space and can be used to centrally store spare parts related to the tooling, such as clamping blocks 42 of different specifications or types, sealing rings, and assembly tools.

[0046] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A positioning fixture for thin-walled products, characterized in that: Including the workbench (1); Support component (2), which is disposed on the top of the workbench (1) for supporting the product, has a support surface adapted to the bottom shape of the product; Multiple lifting components (3) are symmetrically arranged on opposite sides of the support component (2); and A clamping mechanism (4) is connected to the output end of the lifting assembly (3); The lifting component (3) is used to drive the pressing mechanism (4) to move in the vertical direction, so that the pressing mechanism (4) presses against the top of the product, thereby clamping and fixing the product together with the support component (2).

2. The thin-walled product positioning fixture according to claim 1, characterized in that: The lifting assembly (3) adopts a linear drive device, which is a cylinder, hydraulic cylinder or electric push rod.

3. The thin-walled product positioning fixture according to claim 1, characterized in that: The support component (2) includes multiple independently arranged support blocks (21), which are detachably connected to the workbench (1). The upper surfaces of each support block (21) together form a support surface that is adapted to the bottom shape of the product.

4. The thin-walled product positioning fixture according to claim 1, characterized in that: The support component (2) has a pair of negative pressure adsorption holes (22); the bottom of the workbench (1) is provided with a negative pressure generating device (23), and the negative pressure generating device (23) is connected to the negative pressure adsorption holes (22) through a pipeline.

5. A thin-walled product positioning fixture according to claim 4, characterized in that: A sealing groove (24) is provided around the negative pressure adsorption hole (22) on the support block (21), and a sealing ring is provided in the sealing groove (24).

6. The thin-walled product positioning fixture according to claim 1, characterized in that: The clamping mechanism (4) includes a connecting block (41) and a clamping block (42); one end of the connecting block (41) is fixedly connected to the output end of the lifting assembly (3); the clamping block (42) is detachably installed on the other end of the connecting block (41).

7. A thin-walled product positioning fixture according to claim 6, characterized in that: The clamping block (42) is made of nylon.

8. A thin-walled product positioning fixture according to claim 1, characterized in that: The lifting assembly (3) has 15 units, with 7 units symmetrically arranged on each side of the product and one unit arranged at the end of the product.

9. A thin-walled product positioning fixture according to claim 7, characterized in that: A storage box (5) is provided at the bottom of the workbench (1).

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