Multi-station clamp tool of numerical control milling machine

Abstract

The utility model relates to the technical field of milling machine auxiliary tools, in particular to a multi-station clamp tool of a numerical control milling machine, which comprises a clamping table top, a central clamping block assembly arranged on the clamping table top, two side stop pins and a first driving cylinder used for driving the central clamping block assembly, the center clamping block assembly is arranged in the middle of the clamping table top in the width direction, the two side stop pins are symmetrically arranged on the two sides of the center clamping block assembly and fixedly connected to the position, close to the edge, of the clamping table top, and the length direction of the side stop pins is parallel to the length direction of the clamping table top. The special clamp has the advantages that the problem that a special clamp can only clamp a single workpiece is solved, and the clamping and cutting efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of milling machine auxiliary tools, and in particular to a multi-station fixture for a CNC milling machine. Background Technology

[0002] A CNC milling machine is a type of CNC machine tool used for cutting operations. It can formulate machining processes and select machining parameters based on technical requirements such as the shape, size, precision, and surface roughness of the part. The machining program is then input into the controller. The controller processes the machining program and transmits instructions to the servo units, which in turn send control signals to the servo motors. This causes the spindle motor to drive the cutting tool to rotate, while the servo motors in the X, Y, and Z directions control the relative movement of the cutting tool and the workpiece along a specific trajectory, thus achieving the cutting of the workpiece.

[0003] In related technologies, when bathroom product workpieces require machining, specialized fixtures are used to fix the workpieces on the CNC milling machine's worktable. These specialized fixtures can firmly hold the workpieces in place, reducing workpiece displacement caused by human error or machine vibration during machining, and ensuring machining accuracy.

[0004] Regarding the aforementioned technologies, specialized fixtures typically can only clamp a single workpiece. When mass production of workpieces is carried out, clamping each workpiece individually is time-consuming and inefficient. Utility Model Content

[0005] In order to improve the problem that special fixtures can only clamp a single workpiece and improve clamping and cutting efficiency, this application provides a multi-station fixture for CNC milling machines.

[0006] The multi-station fixture for a CNC milling machine provided in this application adopts the following technical solution:

[0007] A multi-station fixture for a CNC milling machine includes a clamping table, a central clamping block assembly disposed on the clamping table, two side stop pins, and a first drive cylinder for driving the central clamping block assembly.

[0008] The central clamping block assembly is located at the middle position along the width direction of the clamping table. The two side stop pins are symmetrically arranged on both sides of the central clamping block assembly and fixedly connected to the clamping table near the edge. The length direction of the side stop pins is parallel to the length direction of the clamping table.

[0009] By adopting the above technical solution, the first drive cylinder drives the central clamping block assembly, which works in conjunction with the two side stop pins to effectively resist the influence of machine vibration, cutting force, and other factors during processing, reducing the possibility of workpiece displacement. The central clamping block assembly is located at the middle position along the width direction of the clamping table, and the two side stop pins are symmetrically arranged with their length direction parallel to the length direction of the clamping table, which helps to quickly and accurately position the workpiece on the table and improves clamping efficiency.

[0010] Furthermore, the clamping platform is provided with a cylinder base plate for mounting the first driving cylinder below. The cylinder body of the first driving cylinder is fixedly connected to the cylinder base plate. The clamping platform is provided with a mating through hole at the middle position for the piston rod of the first driving cylinder to pass through and slide. The piston rod of the first driving cylinder passes through the mating through hole and is fixedly connected to the central clamping block assembly.

[0011] By adopting the above technical solution, the cylinder base plate below the clamping table is used to install the first drive cylinder, providing a stable mounting foundation for the cylinder. A through hole is provided on the clamping table for the piston rod of the first drive cylinder to pass through and slide, and the piston rod is fixedly connected to the central clamping block assembly, ensuring the accuracy and reliability of power transmission from the cylinder to the central clamping block assembly.

[0012] Furthermore, the central clamping block assembly includes a wedge-shaped pushing block and two abutting sliders. The wedge-shaped pushing block is fixedly connected to the piston rod end of the first driving cylinder. The two abutting sliders are symmetrically arranged and slidably connected to both sides of the wedge-shaped pushing block for abutting against the workpiece. The two abutting sliders are respectively provided with mating inclined surfaces that cooperate with the wedge-shaped pushing block on their mutually close side surfaces.

[0013] By adopting the above technical solution, the central clamping block assembly achieves the clamping action of the workpiece through the cooperation of the wedge-shaped pushing block and the two abutting sliders. When the piston rod of the first driving cylinder pushes the wedge-shaped pushing block to move, the interaction between the mating inclined surfaces on both sides of the wedge-shaped pushing block and the mating inclined surfaces on the abutting sliders enables the two abutting sliders to slide synchronously to both sides and abut against the workpiece. The wedge structure itself has the force amplification characteristic. When the first driving cylinder pushes the wedge-shaped pushing block, the interaction between the inclined surfaces can convert the small axial thrust output by the cylinder into a large clamping force of the abutting sliders on the workpiece.

[0014] Furthermore, two dovetail sliders are fixedly connected to both sides of the wedge-shaped push block, and the two abutting sliders are respectively provided with dovetail grooves on the mating inclined surface for the dovetail sliders to be engaged and slide.

[0015] By adopting the above technical solution, the mating structure of the dovetail slider and the dovetail groove provides guidance for the sliding of the abutting slider on both sides of the wedge-shaped push block. When the wedge-shaped push block moves under the drive of the first drive cylinder, the abutting slider can slide stably along the predetermined trajectory of the dovetail groove, ensuring that its movement direction always meets the design expectation, avoiding deviation, jamming, and other situations, ensuring the accuracy of the workpiece clamping action, so that the workpiece can be accurately fixed in the appropriate position, which is conducive to improving the machining accuracy.

[0016] Furthermore, the clamping table is provided with a side push plate and a second drive cylinder for driving the side push plate near the edge. The length direction of the side push plate is parallel to the width direction of the clamping table. A cylinder gasket is fixedly connected to the edge of the clamping table. The cylinder body of the second drive cylinder is fixedly connected to the cylinder gasket, and the piston rod of the second drive cylinder is fixedly connected to the side wall of the side push plate.

[0017] The clamping table is provided with a positioning pin block for cooperating with the side push plate, and the central clamping assembly is located between the positioning pin block and the side push plate.

[0018] By adopting the above technical solution, and by setting a side push plate and a corresponding second drive cylinder, when clamping the workpiece, the second drive cylinder drives the side push plate to move along the width direction of the clamping table, and cooperates with the positioning pin block to accurately position the workpiece from the side, so that the workpiece can be accurately fixed in the predetermined position in the width direction of the clamping table, thereby further improving the overall positioning accuracy of workpiece clamping.

[0019] Furthermore, the clamping platform is fixedly connected at the corner position to an insert that cooperates with the side stop pin, and the insert and the side stop pin are arranged collinearly along their lengths.

[0020] By adopting the above technical solution, an insert that cooperates with the side stop pin is set at the corner position of the clamping table, and the two are collinear in length direction. This allows the side stop pin and the insert to position and restrict the workpiece from different positions along the same straight line when clamping the workpiece. The insert is fixedly connected to the corner position of the clamping table and cooperates with the side stop pin, which enhances the stability of the surrounding structure of the entire clamping area to a certain extent.

[0021] Furthermore, a central support column is fixedly connected between the upper side of the cylinder base plate and the lower side of the clamping table, and the central support column is located at the middle position of the cylinder base plate and the clamping table.

[0022] By adopting the above technical solution, a central support column is set between the upper side of the cylinder base plate and the lower side of the clamping table, and is located in the middle of the two. This is equivalent to building a stable central axis for the entire fixture, effectively distributing the weight of the clamping table and the workpiece above it, and avoiding local sinking or deformation of the clamping table due to gravity.

[0023] Furthermore, two side support plates are fixedly connected between the upper side of the cylinder base plate and the lower side of the clamping table, and the two side support plates are respectively placed on both sides of the cylinder base plate and the clamping table.

[0024] By adopting the above technical solution, two support plates are set between the cylinder base plate and the clamping table, and placed on both sides respectively. This provides reliable lateral support for the entire fixture structure. When the workpiece is clamped, especially when facing external forces such as lateral cutting forces and vibrations during the machining process, the two support plates can effectively resist these external forces and prevent the clamping table from swaying or tilting laterally.

[0025] Furthermore, the number of the central clamping block assembly and the side push plate is at least two.

[0026] By adopting the above technical solution, the number of central clamping block assemblies and side push plates is at least two. Multiple central clamping block assemblies and side push plates cooperate with each other, enabling the simultaneous application of stable and uniform clamping forces to multiple workpieces from different directions. This allows for simultaneous clamping operations on multiple workpieces on the clamping table, increasing the number of clamping stations. In the mass production of bathroom product workpieces, it is no longer limited to clamping a single or a few workpieces at a time, but rather allows for clamping more workpieces at once, thereby reducing the number of clamping operations, shortening the overall clamping time, and significantly improving production efficiency.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. By coordinating multiple components such as the central clamping block assembly, side stop pins, and side push plates, multiple central clamping block assemblies and side push plates are set up to increase the number of clamping stations, enabling the simultaneous clamping of multiple workpieces, reducing the number of clamping operations, and shortening the overall clamping time. The reasonable layout of each component helps to quickly and accurately position the workpiece, further improving clamping efficiency, which is especially suitable for mass production scenarios of bathroom product workpieces;

[0029] 2. The first drive cylinder drives the center clamping block assembly and the two side stop pins to resist the influence of machine vibration, cutting force and other factors, and reduce workpiece displacement. The dovetail slider and dovetail groove work together to ensure the accuracy of clamping action. The side push plate and positioning pin block work together to improve the lateral positioning accuracy. The interaction of these structures enables the workpiece to be accurately fixed in the right position to be processed, ensuring processing accuracy and ensuring that the produced bathroom products meet the quality requirements.

[0030] 3. Corresponding support structures are installed at different locations on the fixture. For example, the central support column between the cylinder base plate and the clamping table distributes the weight, preventing localized sinking or deformation of the clamping table. The side support plates provide lateral support to resist lateral cutting forces, vibrations, and other external forces, preventing the clamping table from wobbling or tilting. Overall, this makes the fixture structure more stable, enabling long-term stable and reliable operation, and adapting to the frequent use requirements of mass production. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a multi-station fixture for a CNC milling machine according to an embodiment of this application.

[0032] Figure 2 This is an exploded view of the structure of a multi-station fixture for a CNC milling machine according to an embodiment of this application.

[0033] Figure 3 This is an exploded view of the structure of the central clamping block assembly in the embodiments of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Clamping platform; 11. Mating through hole; 2. Cylinder base plate; 21. Central support column; 22. Side support plate; 3. Central clamping block assembly; 31. Wedge-shaped push block; 311. Dovetail slider; 32. Abutting slider; 321. Mating inclined surface; 322. Dovetail groove; 4. Side push plate; 5. First drive cylinder; 6. Second drive cylinder; 7. Side stop pin; 8. Positioning pin block; 9. Insert; 10. Cylinder gasket plate. Detailed Implementation

[0035] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-3 The present application will be further described in detail with reference to the embodiments.

[0036] This application discloses a multi-station fixture for a CNC milling machine. (Refer to...) Figure 1 and Figure 2 The multi-station fixture of the CNC milling machine includes a clamping table 1, a cylinder base plate 2, a central clamping block assembly 3 and a side push plate 4 located on the clamping table 1, a first drive cylinder 5 located on the cylinder base plate 2 for driving the central clamping block assembly 3, a second drive cylinder 6 located on the clamping table 1 for driving the side push plate 4, and a side stop pin 7, a positioning pin block 8 and an insert 9 located on the clamping table 1.

[0037] In this embodiment, the number of center clamping block assemblies 3 is preferably two. The two sets of center clamping block assemblies 3 are arranged at intervals along the length direction of the clamping table 1 and are both located at the middle position along the width direction of the clamping table 1. The number of positioning pins 8 is two. The two positioning pins 8 are fixedly connected to the clamping table 1 and are located between the two sets of center clamping block assemblies 3. The two positioning pins 8 are arranged at intervals along the width direction of the clamping table 1.

[0038] There are two side stop pins 7, which are symmetrically arranged and fixedly connected to both sides of the clamping table 1. The length direction of the side stop pins 7 is parallel to the length direction of the clamping table 1 and is located at the middle position along the length direction of the clamping table 1. There are four inserts 9, which are fixedly connected to the four corner positions of the clamping table 1. The two inserts 9 located on the same long side of the clamping table are both arranged collinearly with the length direction of the side stop pins 7.

[0039] Combination Figure 3 The central clamping block assembly 3 includes a wedge-shaped pushing block 31 and two abutting sliders 32. The two abutting sliders 32 are symmetrically arranged and slidably connected to both sides of the wedge-shaped pushing block 31. Each of the two abutting sliders 32 has a mating inclined surface 321 on its adjacent side surfaces that mates with the wedge-shaped pushing block 31. The wedge-shaped pushing block 31 is symmetrically arranged on both sides near the two abutting sliders 32 and integrally connected with a dovetail slider 311. Each of the two abutting sliders 32 has a dovetail groove 322 on its mating inclined surface 321 for the dovetail slider 311 to engage and slide. When the wedge-shaped pushing block 31 moves downward, it pushes the abutting slider 32 towards the side stop pin 7 and abuts against the workpiece, thereby clamping the workpiece between the pushing block and the side stop pin 7.

[0040] Reference Figure 2 The cylinder base plate 2 is located below the clamping platform 1. A central support column 21 is vertically installed and fixedly connected to the upper side of the cylinder base plate 2 at the middle position. Two side support plates 22 are symmetrically installed on the upper side of the cylinder base plate 2 near both ends. The side support plates 22 are vertically installed and fixedly connected to the cylinder base plate 2. In this embodiment, there are two first drive cylinders 5, and the cylinder bodies of both first drive cylinders 5 are fixedly connected to the cylinder base plate 2. The clamping platform 1 is fixedly connected above the central support column 21 and the two side support plates 22. Two mating through holes 11 are opened at intervals on the clamping platform 1 for the piston rods of the first drive cylinders 5 to pass through and slide. The piston rods of the first drive cylinders 5 pass through the mating through holes 11 and are fixedly connected to the wedge-shaped push block 31.

[0041] In this embodiment, the number of side push plates 4 is preferably two, and the number of second drive cylinders 6 is correspondingly two. Two cylinder gaskets 10 are symmetrically arranged and fixedly connected at the edge positions on both sides of the clamping platform 1. The cylinder body of the second drive cylinder 6 is fixedly connected to the cylinder gasket 10, and the piston rod of the second drive cylinder 6 is fixedly connected to the side wall of the side push plate 4. The length direction of the side push plate 4 is parallel to the length direction of the positioning pin block 8.

[0042] The implementation principle of a multi-station fixture for a CNC milling machine according to an embodiment of this application is as follows: In the central clamping block assembly 3, the wedge-shaped push block 31 and the two abutting sliders 32 achieve a specific motion relationship through the interaction of the inclined surface 321. When the wedge-shaped push block 31 is driven downward by the first driving cylinder 5, the inclined surface pushes the abutting sliders 32 to slide towards the side stop pin 7. Relying on this mechanical structure feature, accurate clamping and positioning of the workpiece is achieved, so that the workpiece is stably positioned between the push block and the side stop pin 7. The cylinder body of the second driving cylinder 6 is fixed on the cylinder pads 10 on both sides of the clamping table 1. The piston rod is connected to the side push plate 4, driving the side push plate 4 to move towards the positioning pin block 8, applying clamping force to the workpiece from the side. This, in conjunction with the clamping action of the central clamping block assembly 3, achieves multi-directional clamping of the workpiece.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-station fixture for a CNC milling machine, characterized in that: It includes a clamping table (1), a central clamping block assembly (3) disposed on the clamping table (1), two side stop pins (7), and a first drive cylinder (5) for driving the central clamping block assembly; The central clamping block assembly (3) is located at the middle position of the clamping table (1) along the width direction. The two side stop pins (7) are symmetrically arranged on both sides of the central clamping block assembly (3) and fixedly connected to the clamping table (1) near the edge. The length direction of the side stop pins (7) is parallel to the length direction of the clamping table (1).

2. The multi-station fixture for a CNC milling machine according to claim 1, characterized in that: The clamping platform (1) is provided with a cylinder base plate (2) for mounting the first driving cylinder (5) at the bottom. The cylinder body of the first driving cylinder (5) is fixedly connected to the cylinder base plate (2). The clamping platform (1) is provided with a mating through hole (11) at the middle position for the piston rod of the first driving cylinder (5) to pass through and slide. The piston rod of the first driving cylinder (5) passes through the mating through hole (11) and is fixedly connected to the center clamping block assembly (3).

3. The multi-station fixture for a CNC milling machine according to claim 2, characterized in that: The central clamping block assembly (3) includes a wedge-shaped push block (31) and two abutting sliders (32). The wedge-shaped push block (31) is fixedly connected to the piston rod end of the first driving cylinder (5). The two abutting sliders (32) are symmetrically arranged and slidably connected to both sides of the wedge-shaped push block (31) for abutting against the workpiece. The two abutting sliders (32) are respectively provided with mating inclined surfaces (321) that cooperate with the wedge-shaped push block (31) on their mutually close side surfaces.

4. A multi-station fixture for a CNC milling machine according to claim 3, characterized in that: Two dovetail sliders (311) are fixedly connected to both sides of the wedge-shaped push block (31). The two abutting sliders (32) are respectively provided with dovetail grooves (322) on the mating inclined surface (321) for the dovetail sliders (311) to be inserted and slide.

5. A multi-station fixture for a CNC milling machine according to claim 1, characterized in that: The clamping table (1) is provided with a side push plate (4) and a second drive cylinder (6) for driving the side push plate (4) near the edge. The length direction of the side push plate (4) is parallel to the width direction of the clamping table (1). A cylinder gasket plate (10) is fixedly connected to the edge of the clamping table (1). The cylinder body of the second drive cylinder (6) is fixedly connected to the cylinder gasket plate (10). The piston rod of the second drive cylinder (6) is fixedly connected to the side wall of the side push plate (4). The clamping table (1) is provided with a positioning pin (8) for cooperating with the side push plate (4), and the center clamping block assembly is located between the positioning pin (8) and the side push plate (4).

6. A multi-station fixture for a CNC milling machine according to claim 1, characterized in that: The clamping platform (1) is fixedly connected at the corner position to an insert (9) that cooperates with the side stop pin (7), and the insert (9) and the side stop pin (7) are arranged in the same direction along their lengths.

7. A multi-station fixture for a CNC milling machine according to claim 2, characterized in that: A central support column (21) is fixedly connected between the upper side of the cylinder base plate (2) and the lower side of the clamping table (1). The central support column (21) is located at the middle position between the cylinder base plate (2) and the clamping table (1).

8. A multi-station fixture for a CNC milling machine according to claim 7, characterized in that: Two side support plates (22) are fixedly connected between the upper side of the cylinder base plate (2) and the lower side of the clamping table (1), and the two side support plates (22) are respectively placed on the cylinder base plate (2) and the clamping table (1).

9. A multi-station fixture for a CNC milling machine according to claim 5, characterized in that: The number of the central clamping block assembly (3) and the side push plate (4) is at least two.

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