Positioning mechanism for five-axis linkage numerical control machining center

Abstract

The utility model discloses a positioning mechanism for five -axis linkage numerical control machining center relates to numerical control machining utensil technical field, including main part, the bottom fixedly connected with base of main part, a plurality of limit holes are set up on the base equally, the fixed column is fixedly connected in the base bottom four corners, the rotation groove is seted up in the main part middle segment inner wall, the rotary connection has the mounting disc in the rotation groove, the transmission part is equipped in the mounting disc bottom, the cross groove is seted up in the main part top end face, the positioning part is slidably arranged in the cross groove, the utility model discloses the setting of adjusting lever can realize the perpendicular conversion of power direction, ensures the accurate and efficient power transmission, through the setting of side edge limit stop, can form the stereoscopic restraint to work piece from the lateral and vertical, through the setting of guide circle track, can ensure that four fixed frame is along cross groove synchronous radial telescoping when the mounting disc rotates, realizes the central symmetry positioning to work piece, solved the positioning part unable synchronous linkage, work piece positioning easy to deviate center, leads to the problem of the processing reference not being identical.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining tools, and in particular to a positioning mechanism for a five-axis linkage CNC machining center. Background Technology

[0002] Five-axis linkage CNC machining centers are core equipment in the field of precision manufacturing and are widely used in industries with extremely high requirements for the precision of parts, such as aerospace, automotive molds, and high-end equipment. Their machining advantage lies in their ability to complete the clamping and machining of complex curved surfaces and irregularly shaped parts in one go through multi-axis coordinated motion. The premise of this process is that the workpiece must achieve high-precision center positioning. Traditional clamping mechanism adjustment relies on individual drives, with synchronous adjustment achieved manually or through a simple control system. However, due to slight differences in the response speed and power output of each drive component, it is difficult to ensure that the movement of the four components is completely consistent during actual adjustment. This results in workpiece positioning eccentricity and excessive symmetry of the machined parts. For complex workpieces that require multi-faceted machining, this center offset can accumulate into a larger machining error, or even lead to the scrapping of the parts. Therefore, the above problems need to be solved. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a positioning mechanism for a five-axis linkage CNC machining center.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a positioning mechanism for a five-axis linkage CNC machining center, comprising a main body, a base fixedly connected to the bottom of the main body, a plurality of limiting holes equally spaced on the base, fixing posts fixedly connected to the four corners of the bottom of the base, a rotating groove formed on the inner wall of the middle section of the main body, a mounting plate rotatably connected in the rotating groove, a transmission component at the bottom of the mounting plate, a cross groove formed on the top surface of the main body, and a positioning component slidably disposed in the cross groove.

[0005] Preferably, the transmission component includes a connecting column fixed to the bottom of the mounting plate and an adjusting rod rotatably disposed within the main body. A first bevel gear is coaxially fixed to the bottom of the connecting column, and a support column is fixed to the bottom of the first bevel gear. The bottom of the support column is rotatably connected to the bottom of the main body.

[0006] Preferably, a second bevel gear is coaxially fixed to one end of the adjusting rod, and a rotating knob is fixed to one end of the adjusting rod extending to the outer wall of the main body. The second bevel gear meshes with the first bevel gear, and a guide rail is fixed to the top of the mounting plate.

[0007] Preferably, the positioning component includes four fixed frames that are slidably disposed in the cross groove. The bottom of the fixed frame is provided with a movable groove. The fixed frame is slidably engaged with the guide rail through the movable groove. A connecting block is fixedly connected to the top of the fixed frame. A clamping block is rotatably provided on the top of the connecting block.

[0008] Preferably, a rotating shaft is fixedly connected to the bottom of the clamping block, and the clamping block is rotatably connected to the connecting block through the rotating shaft. A height adjustment knob is screwed to the top of the clamping block, and the height adjustment knob is connected to an abutment block fixedly connected to one end of the bottom of the clamping block. The bottom of the abutment block movably abuts against the surface of the item, and a side limiting block is provided on one side of the clamping block.

[0009] Preferably, the outer wall of the rotary knob is provided with anti-slip texture, and one side of the rotary knob is provided with an internal hexagonal hole adapted for adjustment by an external wrench.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model, through the cooperation of the adjusting rod and the connecting column, the rotational power of the rotating knob can be transmitted to the mounting plate through the meshing of bevel gears, realizing the vertical conversion of the power direction. At the same time, the lever principle is used to save adjustment force and ensure accurate and efficient power transmission. Through the cooperation of the abutment block and the side limiting block, a three-dimensional constraint can be formed on the workpiece from the side and vertical, preventing the workpiece from shifting or rotating in the horizontal direction during processing. Through the setting of the guide rail, it can be ensured that the four fixed brackets can synchronously extend and retract radially along the cross groove when the mounting plate rotates, realizing the central symmetrical positioning of the workpiece. This solves the problem that the positioning components cannot be synchronously linked and the workpiece positioning is prone to offset from the center, resulting in inconsistent processing references. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall first-view structure proposed in this utility model; Figure 2 This is a schematic diagram of the internal second-view structure proposed in this utility model; Figure 3 This is a schematic diagram of the structure of some parts proposed in this utility model; Figure 4 This is a schematic diagram of the bottom structure of the base proposed in this utility model.

[0012] The following are the components in the diagram: 1. Main body; 2. Base; 3. Rotating knob; 4. Fixing frame; 5. Mounting plate; 6. Height adjustment knob; 7. Connecting block; 8. Side limit block; 9. Rotating shaft; 10. Adjusting rod; 11. Fixing column; 12. Limiting hole. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Example: See Figures 1 to 4 This utility model discloses a positioning mechanism for a five-axis linkage CNC machining center, comprising a main body 1, with a base 2 fixedly connected to the bottom of the main body 1. The base 2 facilitates the support of the entire positioning mechanism and enables a fixed connection with the machining center. Multiple limiting holes 12 are equidistantly provided on the base 2, allowing for multiple fixed points to be provided, enabling the mechanism to adapt to the mounting holes of different sized worktables. Fixed posts 11 are fixedly connected to the four corners of the bottom of the base 2, facilitating the fixing of the entire positioning mechanism onto the machining center worktable. A rotating groove is provided on the inner wall of the middle section of the main body 1, with a mounting plate 5 rotatably connected within the rotating groove. The mounting plate 5 facilitates the use of a guide rail to drive the fixed frame 4 to slide radially along the cross groove. A transmission component is provided at the bottom of the mounting plate 5, and a cross groove is provided on the top surface of the main body 1, with a positioning component slidingly disposed within the cross groove.

[0015] In this utility model, the transmission component includes a connecting column fixed to the bottom of the mounting plate 5 and an adjusting rod 10 laterally rotatable within the main body 1. A first bevel gear is coaxially fixed to the bottom of the connecting column, and a support column is fixed to the bottom of the first bevel gear. The bottom of the support column is rotatably connected to the bottom of the main body 1. The adjusting rod 10 facilitates the transmission of the rotational power of the rotating knob 3 to the mounting plate 5 through the bevel gear meshing, achieving a vertical conversion of the power direction. A second bevel gear is coaxially fixed to one end of the adjusting rod 10, and a rotating knob 3 is fixed to the end of the adjusting rod 10 extending to the outer wall of the main body 1. The second bevel gear meshes with the first bevel gear. A guide rail is fixed to the top of the mounting plate 5. The guide rail facilitates the provision of stable motion trajectory constraints for the fixed frames 4, ensuring that the four fixed frames 4 synchronously extend and retract radially along the cross groove when the mounting plate 5 rotates, achieving symmetrical positioning of the workpiece. The positioning component includes four fixed frames 4 slidably disposed within the cross groove. A moving groove is opened at the bottom of the fixed frame 4, and the fixed frame 4 connects to the guide rail through the moving groove. The workpiece is centered by sliding and snapping together with the track. The top of the fixed frame 4 is fixedly connected to the connecting block 7, and the top of the connecting block 7 is rotatably equipped with a clamping block. The fixed frame 4 facilitates the clamping block to center the workpiece. The four fixed frames 4 can work together to meet the clamping requirements of workpieces of different sizes. The bottom of the clamping block is fixedly connected to the rotating shaft 9, and the clamping block is rotatably connected to the connecting block 7 through the rotating shaft 9. The top of the clamping block is screwed to the height adjustment knob 6, and the height adjustment knob 6 is connected to the bottom end of the clamping block and fixedly connected to the abutment block. The bottom of the abutment block moves against the surface of the workpiece. A side limit block 8 is provided on one side of the clamping block. The height adjustment knob 6 facilitates vertical clamping of workpieces of different thicknesses. The side limit block 8 forms a three-dimensional positioning, which improves the clamping stability of the workpiece. The outer wall of the rotating knob 3 is provided with anti-slip texture. The side of the rotating knob 3 is provided with an internal hexagonal hole adapted to the external wrench for auxiliary adjustment. The internal hexagonal hole facilitates the use of a hexagonal wrench to easily overcome resistance and drive the adjustment rod 10 to rotate, ensuring the smooth operation of the mounting plate 5 and the positioning components.

[0016] Working Principle: When using this utility model, the positioning mechanism is first installed on the worktable of the five-axis machining center via the fixing columns 11 at the four corners of the bottom of the base 2. The corresponding limiting holes 12 on the base 2 are selected according to the worktable hole positions and fixed with bolts to form a stable machining reference. Then, the operator applies rotational force by rotating the knob 3. The knob drives the horizontally arranged adjusting rod 10 to rotate synchronously. The second bevel gear at one end of the adjusting rod 10 meshes with the first bevel gear on the connecting column at the bottom of the mounting plate 5, converting the horizontal rotational force into vertical rotational force, driving the mounting plate 5 to rotate smoothly within the rotating groove of the main body 1. When encountering significant adjustment resistance, an Allen wrench can be inserted into the Allen hole on the side of the knob to increase the torque and ensure smooth transmission. Simultaneously, the guide rail at the top of the mounting plate 5 rotates synchronously with the mounting plate 5. The moving groove at the bottom of the fixing frame 4 slides and engages with the guide rail. Under the constraint of the guide rail's trajectory, the four fixing frames 4 move radially along the cross groove on the top surface of the main body 1. Synchronous movement, with the dual guiding effect of the cross groove and guide rail, ensures the precise movement trajectory of the fixed frame 4, preventing wobbling or deviation, and ensuring that the four clamping blocks are always in a centrally symmetrical position. Then, according to the workpiece size, the four fixed frames 4 are moved to the appropriate position through the above adjustments. The side limit blocks 8 on one side of the clamping blocks press against the side of the workpiece from all sides, forming a rigid constraint in the horizontal direction, preventing the workpiece from shifting or rotating horizontally during processing. For irregularly shaped workpieces, the angle of the clamping blocks can be adjusted by the rotating shaft 9 at the bottom of the connecting block 7, so that the side limit blocks 8 fit tightly against the side of the workpiece, improving the positioning adaptability. By precisely adjusting the height adjustment knobs 6 of the four clamping blocks, it can adapt to workpieces of different thicknesses or irregular top surfaces, forming a vertical pressure constraint. Combined with the lateral limit, it achieves three-dimensional stable positioning of the workpiece. Finally, after processing is completed, the knob 3 is rotated in the opposite direction, and the fixed frame 4 is moved outward synchronously through the transmission components to release the workpiece. This concludes the use of a positioning mechanism for a five-axis linkage CNC machining center.

[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A positioning mechanism for a five-axis linkage CNC machining center, comprising a main body (1), characterized in that: The main body (1) is fixedly connected to a base (2) at the bottom. Multiple limiting holes (12) are equally spaced on the base (2). Fixed posts (11) are fixedly connected to the four corners of the bottom of the base (2). A rotating groove is opened in the inner wall of the middle section of the main body (1). An installation plate (5) is rotatably connected in the rotating groove. A transmission component is provided at the bottom of the installation plate (5). A cross groove is opened on the top surface of the main body (1). A positioning component is slidably provided in the cross groove.

2. The positioning mechanism for a five-axis linkage CNC machining center according to claim 1, characterized in that: The transmission component includes a connecting column fixed to the bottom of the mounting plate (5) and an adjusting rod (10) rotatably disposed in the main body (1). A first bevel gear is coaxially fixed to the bottom of the connecting column, and a support column is fixed to the bottom of the first bevel gear. The bottom of the support column is rotatably connected to the bottom of the main body (1).

3. The positioning mechanism for a five-axis linkage CNC machining center according to claim 2, characterized in that: One end of the adjusting rod (10) is coaxially fixed with a second bevel gear, and the end of the adjusting rod (10) extending to the outer wall of the main body (1) is fixed with a rotating knob (3). The second bevel gear meshes with the first bevel gear, and a guide rail is fixed to the top of the mounting plate (5).

4. The positioning mechanism for a five-axis linkage CNC machining center according to claim 1, characterized in that: The positioning component includes four fixed frames (4) that are slidably disposed in the cross groove. The bottom of the fixed frame (4) is provided with a moving groove. The fixed frame (4) is slidably engaged with the guide rail through the moving groove. A connecting block (7) is fixedly connected to the top of the fixed frame (4). A clamping block is rotatably provided on the top of the connecting block (7).

5. The positioning mechanism for a five-axis linkage numerical control machining center according to claim 4, characterized in that: The bottom of the clamping block is fixedly connected to a rotating shaft (9), and the clamping block is rotatably connected to the connecting block (7) through the rotating shaft (9). The top of the clamping block is screwed with a height adjustment knob (6), and the height adjustment knob (6) is connected to a bottom end of the clamping block and fixedly connected to an abutment block. The bottom of the abutment block moves against the surface of the item. A side limiting block (8) is provided on one side of the clamping block.

6. The positioning mechanism for a five-axis linkage numerical control machining center according to claim 3, characterized in that: The outer wall of the rotary knob (3) is provided with anti-slip texture, and one side of the rotary knob (3) is provided with an internal hexagonal hole adapted to external wrench for auxiliary adjustment.

Images