Positioning device of numerical control five-axis machining center

Abstract

The utility model discloses a positioning device of numerical control five -axis machining center machine relates to machining technical field, including base, the top fixed connection of base has two side plates, and two side plates are with base midline place symmetry design, the top of base is provided with axial adjusting assembly, the utility model has the beneficial effect that: through setting up drive assembly can be convenient for the position of positioning assembly to adjust, again through adsorption assembly cooperation forms two kinds of fixed mode, and the positioning assembly of drive assembly drive can realize rigid clamping from workpiece side portion, and the cutting torque of many directions when resisting five -axis processing, and adsorption assembly can form negative pressure adsorption from workpiece bottom or contact surface, eliminate the clearance of workpiece and positioning surface, and the three -dimensional constraint of two combinations forms, can resist the impact force of heavy cutting and prevent workpiece displacement, and can avoid the loosening caused by processing vibration, and the clamping stability of workpiece in complex linkage processing is greatly promoted.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing technology, and in particular to a positioning device for a CNC five-axis machining center. Background Technology

[0002] A five-axis CNC machining center is a high-precision CNC machine that achieves efficient and precise machining of complex curved surfaces, irregularly shaped workpieces, and inclined holes through the linkage of X, Y, and Z linear axes with two rotary axes. It features high-precision positioning, five-axis linkage control, and RTCP function, and is widely used in aerospace, automotive mold, and medical device fields.

[0003] Five-axis CNC machining centers require positioning devices because they ensure that the tool is precisely aligned with the workpiece in three-dimensional space, enabling the machining of complex curved surfaces, avoiding machining errors and interference, ensuring machining stability, and meeting the stringent precision requirements of aerospace or mold-making fields.

[0004] Currently, the positioning devices of traditional CNC five-axis machining centers usually adopt a single type of mechanical fixing effect. The rigidity and load-bearing capacity of a single mechanical fixing method are limited, which will lead to deformation of the transmission mechanism and insufficient transmission rigidity, thereby causing vibration of the workpiece or tool. This not only causes deviation in positioning position, but also makes it difficult to meet the requirements of subsequent machining dimensions and geometric tolerances. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A positioning device for a CNC five-axis machining center includes a base, two side plates fixedly connected to the top of the base, and the two side plates are symmetrically designed with respect to the center line of the base. An axial adjustment assembly is provided above the base. A support rod is fixedly connected between the two side plates. A worktable is fixedly connected to the top of the support rod. Four sets of drive assemblies are provided inside the worktable. A positioning assembly is provided on one side of the drive assembly. An adsorption assembly is provided inside the worktable.

[0008] The positioning component includes a connecting plate disposed on one side of the driving component, and a positioning block is fixedly connected to one side of the connecting plate by bolts;

[0009] The adsorption assembly includes a suction cup fixed to the inner wall of the workbench. The inner wall of the suction cup is connected to a connecting pipe. One end of the connecting pipe is connected to a negative pressure fan, and the bottom of the negative pressure fan is fixedly connected to the inner wall of the side plate.

[0010] As a preferred embodiment of the positioning device of the CNC five-axis machining center of this utility model, the driving component includes a positioning plate fixed to the inner wall of the worktable, and a cylinder is fixedly connected to the inner wall of the positioning plate.

[0011] As a preferred embodiment of the positioning device of the CNC five-axis machining center of this utility model, the drive assembly further includes a fixing plate fixed to the cylinder piston rod, and one side of the fixing plate is fixedly connected to one side of the connecting plate by bolts.

[0012] As a preferred embodiment of the positioning device of the CNC five-axis machining center of this utility model, the positioning component further includes a fixing frame fixed to the top of the worktable by bolts, and a positioning frame is fixedly connected to one side of the fixing frame by bolts.

[0013] As a preferred embodiment of the positioning device for the CNC five-axis machining center of this utility model, the inner wall of the positioning plate is fixedly connected to two fixed columns, one end of each fixed column is fixedly connected to a connecting rod, and the outer side of the connecting rod is slidably connected to the inner wall of the fixed plate.

[0014] As a preferred embodiment of the positioning device of the CNC five-axis machining center of this utility model, the inner wall of the worktable is provided with a slot for providing space for the connecting plate to move.

[0015] As a preferred embodiment of the positioning device of the CNC five-axis machining center of this utility model, the bottom of the positioning frame is fixed with a fixing block for fixing the workpiece by bolts, and the inner wall of the suction cup is provided with multiple sets of through holes.

[0016] In summary, this utility model has the following beneficial effects: by setting the driving component, the position of the positioning component can be easily adjusted; by using the adsorption component, two fixing methods are formed. The positioning component driven by the driving component can achieve rigid clamping from the side of the workpiece, resisting the multi-directional cutting torque during five-axis machining; the adsorption component can form negative pressure adsorption from the bottom or contact surface of the workpiece, eliminating the gap between the workpiece and the positioning surface. The combination of the two forms a three-dimensional constraint, which can not only resist the impact force during heavy cutting to prevent workpiece displacement, but also avoid loosening caused by machining vibration, greatly improving the clamping stability of the workpiece in complex linkage machining. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is an overall structural diagram of the positioning device for a CNC five-axis machining center.

[0019] Figure 2 This is a schematic diagram of the suction cup and negative pressure fan in this utility model.

[0020] Figure 3 This is a schematic diagram of the worktable and through hole in this utility model.

[0021] Figure 4 This is a schematic diagram of the drive component in this utility model.

[0022] Figure 5 for Figure 2 A magnified structural diagram of point A shown.

[0023] The following are the labeling elements in the diagram: 1. Base; 2. Side plate; 3. Axial adjustment assembly; 4. Support rod; 5. Worktable; 6. Drive assembly; 61. Positioning plate; 62. Cylinder; 63. Fixing plate; 7. Positioning assembly; 71. Connecting plate; 72. Positioning block; 73. Fixing frame; 74. Positioning frame; 8. Adsorption assembly; 81. Suction cup; 82. Connecting pipe; 83. Negative pressure fan; 9. Fixing column; 10. Connecting rod; 11. Groove; 12. Fixing block; 13. Through hole. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Example 1:

[0028] Reference Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a positioning device for a CNC five-axis machining center, including a base 1. Two side plates 2 are fixedly connected to the top of the base 1, and the two side plates 2 are symmetrically designed with respect to the center line of the base 1. An axial adjustment component 3 is provided above the base 1. A support rod 4 is fixedly connected between the two side plates 2. A worktable 5 is fixedly connected to the top of the support rod 4. Four sets of drive components 6 are provided inside the worktable 5. A positioning component 7 is provided on one side of the drive components 6. An adsorption component 8 is provided inside the worktable 5.

[0029] The base 1 provides convenient support for the top side plate 2 and all other components on the device, allowing the entire device to be placed stably on the ground or machine tool frame, preventing overall shaking during processing. The side plate 2 provides the installation position and also helps stabilize the worktable 5, making the worktable 5 more evenly stressed. The axial adjustment component 3 can adapt to workpieces with different axial processing requirements, changing the axial position of the tool to process different positions of the workpiece. The support rod 4 supports the worktable 5 and leaves space between the worktable 5 and the base 1, facilitating the arrangement of other components and ensuring the flatness of the worktable 5 after installation. The design of the worktable 5 facilitates the installation of the drive component 6 and the adsorption component 8, while the slot 11 provides sufficient space for the movement of the connecting plate 71, preventing the connecting plate 71 from getting stuck during movement.

[0030] It should be noted that the axial adjustment component 3 uses a motor and a threaded rod to drive axial movement. Its principle is the same as that of the prior art (application number CN202320282068.8, entitled 'XYZ walking welding device', which describes the XYZ axis movement principle). It is usually composed of three mutually perpendicular linear motion axes, each equipped with an independent drive structure and transmission mechanism. During operation, the control device sends pulse signals to drive the motors of each axis to rotate, which is then converted into linear motion by the transmission mechanism, enabling the worktable 5 to move in the X, Y, and Z directions. This is prior art and will not be described in detail here. At the same time, the axial adjustment component 3 uses a threaded rod, and the outer side of the threaded rod is fitted with a foldable corrugated tube to prevent dust from falling on the threaded rod during daily use.

[0031] The positioning component 7 includes a connecting plate 71 disposed on one side of the drive component 6, and a positioning block 72 is fixedly connected to one side of the connecting plate 71 by bolts.

[0032] The connecting plate 71 is used to connect the fixed plate 63 and the positioning block 72, so as to facilitate the transmission of the power from the fixed plate 63 to the positioning block 72, thereby driving the positioning block 72 to move, thus adapting to workpieces of different lengths. The positioning block 72 directly contacts the side of the workpiece and is used with bolts to clamp the workpiece laterally, preventing the workpiece from moving left or right or back and forth during processing.

[0033] The adsorption assembly 8 includes a suction cup 81 fixed to the inner wall of the workbench 5. The inner wall of the suction cup 81 is connected to a connecting pipe 82. One end of the connecting pipe 82 is connected to a negative pressure fan 83, and the bottom of the negative pressure fan 83 is fixedly connected to the inner wall of the side plate 2.

[0034] The suction cup 81 adheres to the bottom of the workpiece and uses negative pressure to generate suction to fix the workpiece, eliminating the gap between the workpiece and the surface of the worktable 5 and preventing slight shaking of the workpiece during processing. The connecting pipe 82 is used to connect the suction cup 81 and the negative pressure fan 83, so that the negative pressure fan 83 can extract the air in the suction cup 81 to create a negative pressure environment. When the negative pressure fan 83 is turned on, it creates negative pressure in the suction cup 81 by drawing air, thereby generating suction to fix the workpiece. When in use, after the workpiece is placed, it is turned on to extract the air in the suction cup 81 through the connecting pipe 82. After the workpiece is processed, it is turned off to allow air to enter the suction cup 81, the suction disappears, and the workpiece can be easily removed.

[0035] Example 2:

[0036] This is the second embodiment of the present invention, which is based on the previous embodiment.

[0037] Specifically, the drive assembly 6 includes a positioning plate 61 fixed to the inner wall of the worktable 5, and a cylinder 62 is fixedly connected to the inner wall of the positioning plate 61.

[0038] The positioning plate 61 is used to fix the cylinder 62 and the fixing column 9, so that the cylinder 62 can remain stable after installation and avoid the cylinder 62 from shifting its position when working. When the cylinder 62 runs, it can drive the fixing plate 63 to move, and then drive the positioning component 7 to move, so as to adapt to workpieces of different lengths and widths.

[0039] It should be noted that cylinder 62 is used in conjunction with an air compressor, an air tank, a filter pressure reducing valve, a directional control valve, and a flow control valve. During use, the air compressor compresses ambient air to a set pressure and stores it in the air tank. The filter pressure reducing valve further purifies the air and stabilizes the pressure, then delivers it to the control valve through an air pipe. The directional control valve switches the airflow channel according to an electrical signal to determine the extension and retraction direction of cylinder 62. The flow control valve adjusts the airflow speed to control the movement speed of cylinder 62. Compressed air enters the rod chamber or rodless chamber of cylinder 62, pushing the piston to move. The piston drives the piston rod to output linear reciprocating motion.

[0040] Specifically, the drive assembly 6 also includes a fixing plate 63 fixed to the piston rod of the cylinder 62, and one side of the fixing plate 63 is fixedly connected to one side of the connecting plate 71 by bolts.

[0041] The fixing plate 63 serves to connect the cylinder 62 and the connecting plate 71, facilitating the transmission of power from the cylinder 62 to the positioning component 7.

[0042] Specifically, the positioning component 7 also includes a fixing frame 73 that is fixed to the top of the worktable 5 by bolts, and a positioning frame 74 is fixedly connected to one side of the fixing frame 73 by bolts.

[0043] The fixed frame 73 allows the positioning frame 74 to be securely installed on the top of the workbench 5. The positioning frame 74 is used to fix the fixed block 12. The inner wall of the fixed frame 73 is provided with a sliding groove, and the positioning frame 74 can move up and down in the sliding groove to accommodate workpieces of different heights.

[0044] Example 3:

[0045] This is the third embodiment of the present invention, which is based on the first two embodiments.

[0046] Specifically, the inner wall of the positioning plate 61 is fixedly connected to two fixing posts 9, one end of the fixing post 9 is fixedly connected to a connecting rod 10, and the outer side of the connecting rod 10 is slidably connected to the inner wall of the fixing plate 63.

[0047] The fixed column 9 and the connecting rod 10 work together to guide the movement of the fixed plate 63, prevent the fixed plate 63 from tilting when it moves, ensure the smooth movement of the positioning component 7, and thus ensure the positioning of the workpiece.

[0048] Specifically, the inner wall of the workbench 5 is provided with slots 11 to provide space for the connecting plate 71 to move.

[0049] The slot 11 is used to provide space for the connecting plate 71 to move, so as to avoid collision or jamming between the connecting plate 71 and the inner wall of the worktable 5 when the connecting plate 71 moves, and to ensure that the connecting plate 71 can move smoothly.

[0050] Specifically, the bottom of the positioning frame 74 is fixed with a fixing block 12 for fixing the workpiece by bolts, and the inner wall of the suction cup 81 has multiple sets of through holes 13.

[0051] The fixing block 12 is fixed from above the workpiece with bolts, which further enhances the fixing effect of the workpiece and prevents the workpiece from tilting upward during processing. The through hole 13 allows the air in the suction cup 81 to be extracted more quickly, while the suction force is evenly distributed in various positions of the suction cup 81 to avoid uneven local force on the workpiece.

[0052] In use, first place the workpiece on the worktable 5. According to the size of the workpiece, adjust the height of the positioning frame 74 and the fixing block 12 along the slide groove of the fixing frame 73. After fixing with bolts, make it fit against the upper surface of the workpiece to complete the initial alignment. Start the cylinder 62 to push the fixing plate 63 to move. The fixing plate 63 slides along the connecting rod 10, and the positioning block 72 moves through the connecting plate 71. The connecting plate 71 slides smoothly in the groove 11 to avoid jamming. Finally, the positioning block 72 clamps the side of the workpiece from all four sides. At this time, tighten the bolts on the top of the positioning block 72 to fix the workpiece again from the top. Finally, start the negative pressure fan 83 on the side plate 2 to draw air out of the suction cup 81 through the connecting pipe 82. The air is quickly discharged through the through hole 13, and a uniform negative pressure is formed in the suction cup 81, which tightly fits the bottom of the workpiece to eliminate gaps. Finally, turn on the axial adjustment component 3 to process.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A positioning device for a CNC five-axis machining center, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to two side plates (2), and the two side plates (2) are symmetrically designed with respect to the center line of the base (1). An axial adjustment component (3) is provided above the base (1). A support rod (4) is fixedly connected between the two side plates (2). A worktable (5) is fixedly connected to the top of the support rod (4). Four sets of drive components (6) are provided inside the worktable (5). A positioning component (7) is provided on one side of the drive component (6). An adsorption component (8) is provided inside the worktable (5). The positioning component (7) includes a connecting plate (71) disposed on one side of the driving component (6), and a positioning block (72) is fixedly connected to one side of the connecting plate (71) by bolts. The adsorption assembly (8) includes a suction cup (81) fixed to the inner wall of the workbench (5). The inner wall of the suction cup (81) is connected to a connecting pipe (82). One end of the connecting pipe (82) is connected to a negative pressure fan (83), and the bottom of the negative pressure fan (83) is fixedly connected to the inner wall of the side plate (2).

2. The positioning device for a CNC five-axis machining center as described in claim 1, characterized in that: The drive assembly (6) includes a positioning plate (61) fixed to the inner wall of the worktable (5), and a cylinder (62) is fixedly connected to the inner wall of the positioning plate (61).

3. The positioning device for a CNC five-axis machining center as described in claim 2, characterized in that: The drive assembly (6) also includes a fixing plate (63) fixed to the piston rod of the cylinder (62), and one side of the fixing plate (63) is fixedly connected to one side of the connecting plate (71) by bolts.

4. The positioning device for a CNC five-axis machining center as described in claim 1, characterized in that: The positioning component (7) also includes a fixing frame (73) that is fixed to the top of the workbench (5) by bolts, and a positioning frame (74) is fixedly connected to one side of the fixing frame (73) by bolts.

5. The positioning device for a CNC five-axis machining center as described in claim 2, characterized in that: The inner wall of the positioning plate (61) is fixedly connected to two fixed columns (9), one end of the fixed column (9) is fixedly connected to a connecting rod (10), and the outer side of the connecting rod (10) is slidably connected to the inner wall of the fixed plate (63).

6. The positioning device for a CNC five-axis machining center as described in claim 1, characterized in that: The inner wall of the workbench (5) is provided with a slot (11) for providing space for the connecting plate (71) to move.

7. The positioning device for a CNC five-axis machining center as described in claim 4, characterized in that: The bottom of the positioning frame (74) is fixed with a fixing block (12) for fixing the workpiece by bolts, and the inner wall of the suction cup (81) has multiple sets of through holes (13).

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