Machining fixtures

Abstract

This utility model relates to a processing fixture, comprising: an upper base plate; a positioning module disposed on the upper base plate; a clamping module disposed on the upper base plate, the clamping module being movable along the length direction of the upper base plate and opposite to the positioning module to define a spacing between the positioning module and the clamping module for accommodating the workpiece to be processed; an abutting module disposed on the upper base plate, the abutting module having an abutting side surface abutting against the clamping module, the horizontal distance from the abutting side surface to the longitudinal axis of the abutting module gradually decreasing from top to bottom along the longitudinal axis; and a pneumatic cylinder disposed below the upper base plate, which is connected to the abutting module, and the abutting module can be adjusted to move up and down along the longitudinal axis by controlling the inflation or deflation of the pneumatic cylinder.

Description

Technical Field

[0001] This utility model relates to a machining fixture, and more particularly to a pneumatic fixture suitable for efficient machining of a variety of small batches of parts. Technical Background

[0002] In machining production, product blanks need to be sawn in batches from large to small. The following problems exist when sawing small-sized parts in batches: traditional hand-cranked vises have long clamping times and can only clamp one piece at a time, resulting in low equipment and personnel utilization; frequent model changes require adjustments to the fixture positioning structure, leading to low changeover efficiency; and existing fixtures have imperfect degree-of-freedom control, easily causing machining errors. Therefore, traditional machining results in high clamping frequency, with product clamping time exceeding machining time, leading to low equipment and personnel utilization.

[0003] Although there are pneumatic clamping solutions in the existing technology, they generally suffer from problems such as narrow applicability and insufficient stability in simultaneous clamping of multiple parts. Utility Model Content

[0004] This utility model provides a machining fixture that can simultaneously clamp multiple parts, quickly position them, and is applicable to multiple models of parts, solving the problems of low clamping efficiency and insufficient utilization of personnel and equipment.

[0005] A machining fixture according to this utility model includes: an upper base plate; a positioning module disposed on the upper base plate; a clamping module disposed on the upper base plate, the clamping module being movable along the length direction of the upper base plate and opposite to the positioning module to define a spacing between the positioning module and the clamping module for accommodating the workpiece to be processed; a stop module disposed on the upper base plate, the stop module having a stop side surface that abuts against the clamping module, the horizontal distance from the stop side surface to the longitudinal axis of the stop module gradually decreasing from top to bottom along the longitudinal axis; and a pneumatic cylinder disposed below the upper base plate, connected to the stop module, the stop module being able to move up and down along the longitudinal axis by controlling the inflation or deflation of the pneumatic cylinder. The machining fixture according to this utility model uses a cylinder-driven wedge-shaped stop mechanism, significantly reducing the clamping / releasing action time, significantly improving upon manual vise operation, and significantly reducing non-cutting time. Furthermore, through the mutual cooperation and synergistic effect of the positioning module, clamping module, and stop module, the risk of workpiece displacement is eliminated, significantly improving the machining repeatability and positioning accuracy.

[0006] In one variation of this invention, the abutting module has a first abutting side surface that abuts against the clamping module and a second abutting side surface that is opposite to the first abutting side surface and abuts against another clamping module. Therefore, by controlling the abutting module to move up and down along the longitudinal axis, the movement of the two clamping modules along the length direction of the upper substrate can be simultaneously controlled, thereby enabling the simultaneous processing of two components.

[0007] In one variation of this invention, the abutment module is constructed in a wedge shape, wider at the top and narrower at the bottom. The horizontal distance from the abutment side surface to the longitudinal axis of the abutment module decreases linearly from top to bottom along the longitudinal axis. The wedge-shaped structure of the abutment module converts the vertical pulling force of the cylinder into a horizontal clamping force. The inclined plane angle amplifies the force, allowing a smaller cylinder driving force to generate a larger effective clamping force, ensuring the workpiece is securely fixed. Furthermore, the constant (linearly varying) slope of the inclined plane ensures that all clamping modules move synchronously and equidistantly when the cylinder actuates, avoiding the uneven clamping problem caused by accumulated errors in traditional linkage mechanisms.

[0008] In one variation of this invention, the processing fixture includes multiple positioning modules, multiple clamping modules, multiple abutment modules, and multiple pneumatic cylinders arranged along the width direction of the upper substrate. The number of these modules corresponds to the number of units, and each module is between 2 and 6. By arranging multiple sets of functional modules in parallel along the width direction, 2-6 pieces can be processed simultaneously within the standard saw table size, significantly saving longitudinal space compared to the traditional single-row layout. Furthermore, in the event of a single station failure (such as cylinder failure), that station can be isolated to continue production, improving overall equipment efficiency (OEE). Operators can complete multiple loading and unloading operations at a time, increasing the number of machines managed per operator from 2 to 6, and reducing labor costs by 60%.

[0009] In one variation of this invention, the machining fixture includes multiple positioning modules, multiple clamping modules, multiple abutment modules, and multiple pneumatic cylinders arranged along the length of the upper substrate. The number of positioning modules corresponds to the number of clamping modules, and the number of abutment modules corresponds to the number of pneumatic cylinders and is half the number of positioning modules or clamping modules. The number of positioning modules or clamping modules is between 2 and 20. This allows for simultaneous machining at up to 2-20 stations on a standard-length substrate, significantly improving upon traditional layouts and meeting the mass production needs of micro-sized parts. Furthermore, a single wedge-shaped abutment module simultaneously drives two symmetrically arranged clamping modules, reducing the number of cylinders by 50% while ensuring simultaneous clamping at up to 2-20 stations.

[0010] In one variation of this invention, the upper substrate has a groove arranged along the width direction of the upper substrate, and the abutment module is arranged in the groove. Through the recessed design of the groove, the total height of the abutment module is reduced, thereby lowering the overall height of the fixture and making it suitable for various small machining centers.

[0011] In one variation of this invention, the machining fixture further includes a fixing module disposed on the upper base plate and located between the clamping module and the abutment module. The upper end of the fixing module has a notch for accommodating a protrusion of the clamping module extending toward the abutment module. The cooperation between the notch and the protrusion creates a guiding structure, thereby improving the accuracy of the straightness of the horizontal movement of the clamping module.

[0012] In one variation of this invention, limiting members are installed at each of the four corners of the abutment module to restrict its movement in the width direction of the upper substrate. This corner-limiting mechanism forms a "box-type constraint," significantly limiting the displacement of the abutment module in the width direction, making it particularly suitable for precision machining processes.

[0013] In one variation of this invention, a support plate is arranged between the pneumatic cylinder and the upper base plate. The support plate ensures uniform distribution of cylinder output force and consistent clamping force across multiple workstations.

[0014] In one variation of the present invention, the processing fixture further includes two side plates connected to both ends of the upper substrate and a lower substrate opposite to the upper substrate and connected to the two side plates, with a pneumatic cylinder arranged on the lower substrate.

[0015] The machining fixture according to this utility model can achieve at least the following advantageous technical effects:

[0016] 1. Significantly improved clamping efficiency. Multi-piece synchronous clamping: Through modular layout, the number of workpieces clamped at one time can be increased from the traditional 1 piece to 3 to 20 pieces (depending on the configuration), the clamping time is greatly reduced, and the overall efficiency is improved; Pneumatic fast response: The wedge block mechanism driven by a cylinder is adopted, and the clamping / releasing action time is significantly improved compared with the operation speed of a manual vise, significantly reducing non-cutting time.

[0017] 2. Improved machining accuracy and stability. Through the synergistic effect of the plane (restricting 3 degrees of freedom), the positioning block (restricting 2 degrees of freedom), and the clamping module (restricting 1 degree of freedom), the risk of workpiece displacement is eliminated, significantly improving the accuracy of repeated positioning during machining. Furthermore, the pneumatic system provides a constant clamping force, avoiding workpiece deformation caused by uneven manual operation, and improving the roughness of the sawn surface.

[0018] 3. Modular expansion. By adding positioning modules, clamping modules, and other supporting modules, more workstations can be flexibly configured to meet different batch requirements, thereby improving equipment utilization.

[0019] 4. Human-machine collaboration optimization. Automated clamping increases the number of devices a single person can manage from 2 to 6, improving personnel utilization by 300%; in addition, it significantly reduces the risk of workplace injuries compared to traditional clamping. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example in the corresponding accompanying drawings. These illustrative descriptions do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is a schematic diagram of a machining fixture based on existing technology;

[0022] Figure 2 This is a schematic diagram of the machining fixture according to the present invention;

[0023] Figure 3 This is a schematic diagram of a set of modules of the processing fixture according to the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. The following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. The technical solutions claimed by this utility model can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0025] In the description of this utility model, the terms "first", "second", and "third" are used only to describe features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "provided," "set up," "connected," and "linked" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Figure 1 A schematic diagram of a machining fixture 1' according to the prior art is shown. The machining fixture 1' can only clamp one part at a time, resulting in a high clamping frequency and a product clamping time that is longer than the machining time; in addition, the clamping process requires manual alignment, which is not very accurate.

[0028] The following is combined Figures 2 to 3 The following is a further detailed description of the machining fixture 1 according to the present invention.

[0029] The machining fixture 1 according to this utility model includes an upper base plate 10, which has a width along the width direction W and a length along the length direction L. The machining fixture 1 also includes a positioning module 11 disposed on the upper base plate 10, the positioning module 11 being fixed to the upper base plate 10 by screws. The machining fixture 1 also includes a clamping module 12 disposed on the upper base plate 10, the clamping module 12 being movable along the length direction L of the upper base plate 10 and opposite to the positioning module 11 to define a distance D between the positioning module 11 and the clamping module 12 for accommodating a workpiece P to be processed. When it is necessary to clamp the workpiece P, the clamping module 12 moves toward the positioning module 11 to reduce the distance D between the positioning module 11 and the clamping module 12. When it is necessary to disassemble or remove the processed workpiece, the clamping module 12 moves away from the positioning module 11 to increase the distance D between the positioning module 11 and the clamping module 12.

[0030] The machining fixture 1 further includes abutment module 13 disposed on the upper substrate 10. Abutment module 13 has abutment side surface 131 that abuts against clamping module 12. The horizontal distance from abutment side surface 131 to the longitudinal axis X of abutment module 13 gradually decreases from top to bottom along the longitudinal axis X. In one embodiment, abutment module 13 is configured as a wedge shape, wider at the upper end and narrower at the lower end, with the horizontal distance from abutment side surface 131 to the longitudinal axis X of abutment module 13 decreasing linearly from top to bottom along the longitudinal axis X. In another embodiment, abutment module 13 is configured as an arc-shaped bend, wider at the upper end and narrower at the lower end, with the horizontal distance from abutment side surface 131 to the longitudinal axis X of abutment module 13 decreasing non-linearly from top to bottom along the longitudinal axis X.

[0031] The machining fixture 1 also includes a pneumatic cylinder 14 disposed below the upper base plate 10, which is connected to the abutment module 13. By controlling the inflation or deflation of the pneumatic cylinder 14, the abutment module 13 can be adjusted to move up and down along the longitudinal axis X. Therefore, when the pneumatic cylinder 14 is controlled to retract or deflate, the abutment module 13 moves downward along the longitudinal axis X. As the abutment module 13 moves downward along the longitudinal axis X, the abutment side surface 131 gradually begins to contact the clamping module 12 and applies a horizontal force to the clamping module 12, causing the clamping module 12 to move toward the positioning module 11 to reduce the distance D between the positioning module 11 and the clamping module 12, thereby clamping the workpiece P to be processed. Conversely, when the pneumatic cylinder 14 is inflated, the abutment module 13 moves upward along the longitudinal axis X. As the abutment module 13 moves upward along the longitudinal axis X, the abutment side surface 131 gradually moves away from the clamping module 12, causing the clamping module 12 to move away from the positioning module 11 to reduce the distance D between the positioning module 11 and the clamping module 12. This eliminates the clamping force between the clamping module 12 and the positioning module 11, allowing the processed part P to be removed. In one embodiment, the plane on which the upper surface of the abutment module 13 is located is higher than the plane on which the upper surface of the clamping module 12 is located. In another embodiment, during the up-and-down movement of the abutment module 13 along the longitudinal axis X, the plane on which the upper surface of the abutment module 13 is located is always higher than the plane on which the upper surface of the clamping module 12 is located.

[0032] Therefore, the machining fixture of this utility model adopts a cylinder-driven abutment mechanism, which significantly reduces the clamping / releasing time, resulting in a significant improvement compared to manual vise operation and a significant reduction in non-cutting time. Furthermore, through the cooperation and synergy of the positioning module, clamping module, and abutment module, the risk of workpiece displacement is eliminated, significantly improving the accuracy of repeated positioning during machining.

[0033] In one embodiment, the abutting module 13 has a first abutting side surface 1311 that abuts against the clamping module 12 and a second abutting side surface 1312 that is opposite to the first abutting side surface 1311 and abuts against another clamping module. Therefore, by controlling the abutting module to move up and down along the longitudinal axis, the movement of the two clamping modules along the length direction of the upper substrate can be controlled simultaneously, thereby enabling the simultaneous processing of two components.

[0034] In one embodiment, the processing fixture 1 includes a plurality of positioning modules, a plurality of clamping modules, a plurality of abutting modules, and a plurality of pneumatic cylinders arranged along the width direction W of the upper substrate 10. The number of the plurality of positioning modules, clamping modules, abutting modules, and pneumatic cylinders corresponds, and the number of each is between 2 and 6, preferably between 3 and 4. In a preferred embodiment, as... Figure 2As shown, the machining fixture 1 includes three positioning modules, three clamping modules, three abutting modules, and three pneumatic cylinders arranged along the width direction W of the upper base plate 10. It is worth noting that the number of positioning modules, clamping modules, abutting modules, and pneumatic cylinders can be flexibly increased or decreased according to actual needs. By arranging multiple sets of functional modules in parallel along the width direction, 2-6 pieces can be processed simultaneously within the standard saw table size, significantly saving longitudinal space compared to the traditional single-row layout.

[0035] In one embodiment, the processing fixture 1 includes a plurality of positioning modules, a plurality of clamping modules, a plurality of abutting modules, and a plurality of pneumatic cylinders arranged along the length direction L of the upper substrate 10. The number of positioning modules corresponds to the number of clamping modules, and the number of abutting modules corresponds to the number of pneumatic cylinders and is half the number of positioning modules or clamping modules. The number of positioning modules or clamping modules is between 2 and 20, preferably between 4 and 10. In a preferred embodiment, as... Figure 2 As shown, the machining fixture 1 includes six positioning modules, six clamping modules, three abutting modules, and three pneumatic cylinders arranged along the length L of the upper substrate 10. It is worth noting that the number of positioning modules, clamping modules, abutting modules, and pneumatic cylinders can be flexibly increased or decreased according to actual needs. This allows for simultaneous machining at up to 2-20 stations on a standard-length substrate, significantly improving upon traditional layouts and meeting the mass production requirements of micro-sized parts. Furthermore, a single wedge-shaped abutting module simultaneously drives two symmetrically arranged sets of clamping modules, reducing the number of cylinders by 50% while maintaining the synchronicity of clamping at up to 2-20 stations.

[0036] exist Figure 2 In the preferred embodiment shown, the processing fixture 1 includes a total of 18 positioning modules, 18 clamping modules, 9 abutment modules, and 9 pneumatic cylinders. Therefore, the processing fixture 1 of this invention can clamp 6 products at a time, reducing the single-piece program running time from 10 minutes to 60 minutes, thus improving personnel utilization. It increases personnel utilization by three times, from one person operating two machines to one person operating six machines. Furthermore, the pneumatic design utilizes cylinders for downward force application, combined with the abutment modules driving the clamping modules to achieve clamping requirements. In this embodiment, the processing fixture 1 of this invention has a large size range and can clamp a large number of products at a time, increasing the clamping capacity from one product to six products. The clamping method has also changed from hand-cranked vise clamping to pneumatic clamping, reducing clamping time from 30 seconds to 10 seconds, improving efficiency by three times.

[0037] In one embodiment, the upper substrate 10 has a groove 15 arranged along the width direction W of the upper substrate 10, and the abutment module 13 is disposed in the groove 15. In a preferred embodiment, the upper substrate 10 has three parallel grooves 15 arranged along the width direction W of the upper substrate 10, and each groove 15 contains three abutment modules 13. Through the recessed groove design, the total height of the abutment modules is reduced, thereby lowering the overall height of the fixture and making it suitable for various small machining centers.

[0038] In one embodiment, the machining fixture 1 further includes a fixing module 16 disposed on the upper base plate 10 and located between the clamping module 12 and the abutment module 13. The upper end of the fixing module 16 has a notch 161 for accommodating a protrusion 121 of the clamping module 12 extending toward the abutment module 13. In a preferred embodiment, as the abutment module 13 moves downward along the longitudinal axis, its abutment side surface 131 gradually begins to contact the protrusion 121 of the clamping module 12, driving the protrusion 121 of the clamping module 12 to move horizontally within the notch 161 at the upper end of the fixing module 16. This applies a horizontal force to the clamping module 12, causing it to move toward the positioning module 11 to reduce the distance D between the positioning module 11 and the clamping module 12, thereby clamping the workpiece P to be processed. The cooperation between the notch and the protrusion creates a guiding structure, improving the accuracy of the straightness of the horizontal movement of the clamping module.

[0039] In one embodiment, each of the four corners of the abutment module 13 is equipped with a limiting member 132 for restricting the movement of the abutment module 13 in the width direction W of the upper substrate 10. Preferably, the two side surfaces of the abutment module 13 in the width direction of the processing fixture 1 are vertically arranged, and the limiting members 132 are installed at the corners, which restrict the movement of the abutment module 13 in the width direction W of the upper substrate 10. Therefore, when controlling the inflation or deflation of the pneumatic cylinder, the abutment module is restricted to moving only up and down along the longitudinal axis, without any movement in the horizontal direction.

[0040] In one embodiment, a support plate 17 is arranged between the pneumatic cylinder 14 and the upper base plate 10. The support plate ensures uniform distribution of cylinder output force and consistency of clamping force across multiple stations.

[0041] In one embodiment, the processing fixture 1 further includes two side plates 20 connected to both ends of the upper substrate 10, and a lower substrate 30 opposite to the upper substrate 10 and connected to the two side plates 20, with a pneumatic cylinder 14 arranged on the lower substrate 30.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A machining fixture (1), characterized in that... include: Upper base plate (10), The positioning module (11) is arranged on the upper substrate (10). A clamping module (12) is arranged on the upper substrate (10), the clamping module (12) being movable along the length direction (L) of the upper substrate (10) and opposite to the positioning module (11) to define a spacing (D) between the positioning module (11) and the clamping module (12) for accommodating the part to be processed. An abutment module (13) is arranged on the upper substrate (10), the abutment module (13) having an abutment side surface (131) abutting against the clamping module (12), the horizontal distance from the abutment side surface (131) to the longitudinal axis (X) of the abutment module (13) gradually decreasing from top to bottom along the longitudinal axis (X). A pneumatic cylinder (14) arranged below the upper base plate (10) is connected to the abutment module (13). By controlling the inflation or deflation of the pneumatic cylinder (14), the abutment module (13) can be adjusted to move up and down along the longitudinal axis (X).

2. The machining fixture (1) according to claim 1, characterized in that, The abutting module (13) has a first abutting side surface (1311) abutting against the clamping module (12) and a second abutting side surface (1312) opposite to the first abutting side surface (1311) and abutting against another clamping module.

3. The machining fixture (1) according to claim 1, characterized in that, The abutting module (13) is constructed in a wedge shape that is wide at the top and narrow at the bottom. The horizontal distance from the abutting side surface (131) to the longitudinal axis (X) of the abutting module (13) decreases linearly from top to bottom along the longitudinal axis (X).

4. The machining fixture (1) according to claim 1 or 2, characterized in that, The processing fixture (1) includes a plurality of positioning modules, a plurality of clamping modules, a plurality of abutting modules and a plurality of pneumatic cylinders arranged along the width direction (W) of the upper base plate (10). The number of the plurality of positioning modules, the plurality of clamping modules, the plurality of abutting modules and the plurality of pneumatic cylinders are corresponding and the number of each is between 2 and 6.

5. The machining fixture (1) according to claim 1 or 2, characterized in that, The processing fixture (1) includes a plurality of positioning modules, a plurality of clamping modules, a plurality of abutting modules and a plurality of pneumatic cylinders arranged along the length direction (L) of the upper base plate (10). The number of the plurality of positioning modules corresponds to the number of the plurality of clamping modules. The number of the plurality of abutting modules corresponds to the number of the plurality of pneumatic cylinders and is half the number of the plurality of positioning modules or the plurality of clamping modules. The number of the plurality of positioning modules or the plurality of clamping modules is between 2 and 20.

6. The machining fixture (1) according to claim 1 or 2, characterized in that, The upper substrate (10) has a groove (15) arranged along the width direction (W) of the upper substrate (10), and the abutment module (13) is arranged in the groove (15).

7. The machining fixture (1) according to claim 1 or 2, characterized in that, The processing fixture (1) further includes a fixing module (16) arranged on the upper base plate (10) and located between the clamping module (12) and the abutting module (13). The upper end of the fixing module (16) is provided with a notch (161) for accommodating a protrusion (121) of the clamping module (12) extending toward the abutting module (13).

8. The machining fixture (1) according to claim 1 or 2, characterized in that, Each of the four corners of the abutment module (13) is equipped with a limiting member (132) for restricting the movement of the abutment module (13) in the width direction (W) of the upper substrate (10).

9. The machining fixture (1) according to claim 1 or 2, characterized in that, A support plate (17) is arranged between the pneumatic cylinder (14) and the upper base plate (10).

10. The machining fixture (1) according to claim 1 or 2, characterized in that, The processing fixture (1) further includes two side plates (20) connected to both ends of the upper substrate (10) and a lower substrate (30) opposite to the upper substrate (10) and connected to the two side plates (20), and the pneumatic cylinder (14) is arranged on the lower substrate (30).

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