Positioning tool of four-axis machining center

Abstract

The utility model discloses a positioning tool of a four-axis machining center, which belongs to the technical field of positioning tools and comprises a rotating frame, a conversion pedestal and two groups of rotating shaft seats, a rotating cylinder is mounted on the rotating frame and used for driving the rotating frame to rotate, the conversion pedestal is mounted at the bottom end of the rotating frame, and the rotating frame can drive the conversion pedestal to rotate. The rotating shaft seats are rotationally installed at the two ends of the conversion pedestal respectively, replaceable clamps used for clamping workpieces are fixedly connected to the outer ends of the rotating shaft seats, and the driving mechanism is installed on the conversion pedestal and used for driving the rotating shaft seats to rotate. The positioning tool is technically characterized in that rotating shaft seats on the two sides of a conversion pedestal of the positioning tool can independently rotate under the action of a driving mechanism, so that a workpiece fixed to a replaceable clamp can face a machining tool in any face, the more complex machining requirement is met, a rotating air cylinder can drive the conversion pedestal to horizontally rotate to switch the direction, and the machining efficiency is improved. The to-be-machined workpieces on the different replaceable clamps face the machining tool, so that installation and machining of the workpieces can be conducted synchronously.

Description

Technical Field

[0001] This utility model relates to the field of positioning tooling technology, specifically a positioning tooling for a four-axis machining center. Background Technology

[0002] Four-axis machining, by adding a fourth rotary axis (A / B / C axis) to the traditional three-axis (X / Y / Z) machining, enables multi-angle positioning and machining of workpieces. This technological innovation allows machine tools to: perform multi-face machining, completing the machining of multiple surfaces of a workpiece in a single setup, avoiding repeated positioning errors, and improving machining accuracy and efficiency; and handle complex curved surfaces, efficiently machining complex three-dimensional curved surfaces such as helical grooves, cylindrical cams, and cycloids through the linkage of rotary and linear axes.

[0003] The utility model disclosed in CN215880794U is a four-axis machining fixture for motor housings. It includes a base, which is circular in shape. A slot is radially formed on the top surface of the base, and a retaining strip is placed in the slot. Multiple positioning posts are arranged on the retaining strip from left to right. During machining, the motor housing is fitted onto the positioning posts. This utility model four-axis machining fixture for motor housings has a simple structure, is easy to clamp, and can clamp multiple motor housings at the same time, which greatly improves the machining efficiency and effectively ensures the final machining quality.

[0004] While the aforementioned fixture can clamp and fix multiple workpieces, improving processing efficiency, each individual workpiece cannot rotate around its own central axis, but can only rotate around the circular base. This prevents the machining head from machining every surface of the workpiece. Furthermore, since the workpieces are arranged in an array, they can usually only be machined on two end faces, which is quite limiting. In addition, during the machining process, once some workpieces are machined, they cannot be disassembled and replaced individually. All workpieces must be disassembled and assembled after a batch of workpieces has been machined, making it impossible to synchronize workpiece machining and workpiece loading and unloading, which is not conducive to improving workpiece machining efficiency. Therefore, to address the above problems, a positioning fixture for a four-axis machining center is proposed. Utility Model Content

[0005] The technical problem this utility model aims to solve is to provide a positioning fixture for a four-axis machining center. This positioning fixture has rotatable rotating shaft seats at both ends of a conversion table, on which replaceable fixtures for clamping workpieces are mounted. Both rotating shaft seats can rotate independently under the action of a drive mechanism, allowing the workpiece to face the machining tool from any angle, meeting more complex machining requirements. At the same time, a rotary cylinder can drive the rotating frame to rotate, allowing the conversion table to rotate horizontally and switch orientations, so that the workpieces to be processed on different replaceable fixtures face the machining tool. This allows the installation and processing of the workpiece to be carried out simultaneously, thereby significantly improving the machining efficiency of the workpiece. This solves the technical problems in the comparative technology where a single workpiece cannot rotate around its own central axis, making it impossible for the machining head to process any face of the workpiece, and the workpiece processing and loading / unloading cannot be carried out simultaneously, which is not conducive to improving the workpiece processing efficiency.

[0006] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0007] A positioning fixture for a four-axis machining center includes a rotating frame with a rotary cylinder mounted on it to drive the rotating frame to rotate; a conversion table mounted at the bottom of the rotating frame, which in turn drives the conversion table to rotate; two sets of rotary shaft seats, rotatably mounted at both ends of the conversion table, with replaceable fixtures for clamping workpieces fixedly connected to their outer ends; and a drive mechanism mounted on the conversion table to drive the rotary shaft seats to rotate. The rotary shaft seats on both sides of the conversion table can rotate independently under the action of the drive mechanism, allowing the workpieces fixed on the replaceable fixtures to face the machining tool in any direction, meeting more complex machining requirements. Simultaneously, the rotary cylinder can drive the conversion table to rotate horizontally to switch orientations, allowing the workpieces on different replaceable fixtures to face the machining tool, enabling simultaneous workpiece installation and machining, thereby significantly improving workpiece machining efficiency.

[0008] In one possible implementation, the rotating shaft includes a transverse rotating shaft rotatably mounted in the conversion platform, with a connecting plate fixedly connected to its outer end. This structure enables a stable connection between the transverse rotating shaft and the conversion platform, while providing the necessary structural basis for the connection between the connecting plate and the replaceable fixture.

[0009] In one possible implementation, the drive mechanism includes a drive motor mounted on the lower end face of the conversion platform, and two transmission wheels respectively mounted on the shaft ends of the drive motor and the transverse rotating shaft. The transmission wheels are connected by a transmission belt. When it is necessary to drive the rotating shaft seat to rotate, the drive motor works to drive the transmission wheels to rotate, thereby driving the transverse rotating shaft to rotate.

[0010] In one possible implementation, the conversion platform has a through groove for accommodating the drive wheel and drive belt, and a detachable reinforcing block is detachably connected at the opening of the through groove. The above structure provides the necessary space for the installation and operation of the drive mechanism, while the detachable reinforcing block can strengthen the conversion platform and prevent it from deforming due to the groove.

[0011] In one possible implementation, the rotating frame includes a frame plate with a rotatably connected vertical rotating shaft installed at its center. A drive disk and a connecting plate are fixedly connected to its upper and lower ends, respectively. The drive disk is used to drive the rotary cylinder, and the connecting plate is used to fixally connect to the conversion platform. A connecting seat that mates with the connecting plate is fixedly provided on the upper surface of the conversion platform. When the rotary cylinder is working, it can drive the vertical rotating shaft to rotate, thereby driving the conversion platform connected to the connecting plate to rotate and switch its orientation.

[0012] In one possible implementation, a plurality of wire harnesses arranged in a circular array are fixedly provided on the outer wall of the vertical rotating shaft. The cable of the drive mechanism is spirally wound around the outside of the vertical rotating shaft and does not fit against the outer wall of the vertical rotating shaft. At the same time, the cable is placed in the wire harnesses. The above wiring method can prevent the cable from affecting the movement of the structure. At the same time, this arrangement can give the cable a certain amount of redundant space for stretching and contraction, so that it will not hinder the normal rotation of the conversion platform.

[0013] In one possible implementation, the replaceable fixture includes a fixture base with a plurality of guide rails arranged in a circumferential array. Clamping jaws are slidably mounted in the guide rails, and a rotatable drive screw is mounted in the guide rails and threadedly connected to the clamping jaws. The drive screw drives the clamping jaws to move, thereby clamping and fixing the workpiece placed between the clamping jaws.

[0014] In one possible implementation, a positioning cylinder is provided at the center of the fixture seat, which is threadedly connected to the fixture seat via a coupling at the rear end. When clamping and fixing a cylindrical workpiece, the positioning cylinder can form a support inside the cylindrical shell to prevent the cylindrical shell from being clamped and deformed, and at the same time has a certain positioning function.

[0015] In summary, this utility model has the following beneficial technical effects:

[0016] The positioning fixture has rotatable rotating shaft seats at both ends of the conversion table, on which replaceable fixtures for clamping workpieces are installed. Both rotating shaft seats can rotate independently under the action of the drive mechanism, so that the workpiece can rotate to face any face toward the machining tool, meeting more complex machining requirements. The above driving principle is that when it is necessary to drive the rotating shaft seats to rotate, the drive motor works to drive the transmission wheel to rotate, thereby driving the transverse rotating shaft to rotate.

[0017] Meanwhile, the rotary cylinder can drive the rotating frame to rotate, allowing the conversion table to rotate horizontally and switch orientations, so that the workpieces to be processed on different replaceable fixtures can face the machining tools, enabling the installation and processing of workpieces to be carried out simultaneously, thereby significantly improving the processing efficiency of workpieces. The above driving principle is specifically manifested in that when the rotary cylinder is working, it can drive the vertical rotating shaft to rotate, thereby driving the conversion table connected to the connecting plate to rotate and switch its orientation. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structural configuration of this utility model;

[0021] Figure 3 This is a partial structural schematic diagram of the present invention;

[0022] Figure 4 This is a schematic diagram of the replaceable fixture structure of this utility model.

[0023] In the diagram: 1. Rotating frame; 11. Frame plate; 12. Vertical rotating shaft; 13. Drive disc; 14. Connecting plate; 15. Wire harness clamp; 2. Rotary cylinder; 3. Conversion platform; 31. Connecting seat; 32. Through slot; 33. Removable reinforcing block; 4. Rotating shaft seat; 41. Horizontal rotating shaft; 42. Connecting disc; 5. Drive mechanism; 51. Transmission wheel; 52. Drive motor; 53. Transmission belt; 6. Replaceable fixture; 61. Fixture seat; 62. Guide rail; 63. Gripper; 64. Drive screw; 65. Positioning cylinder; 66. Connecting shaft. Detailed Implementation

[0024] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0025] like Figure 1As shown, this embodiment provides a positioning fixture for a four-axis machining center, including a rotating frame 1 on which a rotary cylinder 2 is mounted to drive the rotating frame 1 to rotate; a conversion table 3 mounted at the bottom of the rotating frame 1, which can drive the conversion table 3 to rotate; two sets of rotary bearing seats 4, which are rotatably mounted at both ends of the conversion table 3, and whose outer ends are fixedly connected to replaceable fixtures 6 for clamping workpieces; and a drive mechanism 5 mounted on the conversion table 3 to drive the rotary bearing seats 4 to rotate. The rotary bearing seats 4 on both sides of the conversion table 3 of this positioning fixture can rotate independently under the action of the drive mechanism 5, so that the workpieces fixed on the replaceable fixtures 6 can face the machining tool in any direction, meeting more complex machining requirements. At the same time, the rotary cylinder 2 can drive the conversion table 3 to rotate horizontally to switch the orientation, so that the workpieces to be processed on different replaceable fixtures 6 face the machining tool, so that the installation and processing of the workpieces can be carried out simultaneously, thereby significantly improving the processing efficiency of the workpieces.

[0026] The rotating bearing 4 includes a transverse rotating shaft 41 rotatably mounted in the conversion platform 3, with a connecting plate 42 fixedly connected to its outer end. This structure enables a stable connection between the transverse rotating shaft 41 and the conversion platform 3, while providing the necessary structural foundation for the connection between the connecting plate 42 and the replaceable clamp 6. Figure 3 As shown.

[0027] The drive mechanism 5 includes a drive motor 52 mounted on the lower end face of the conversion platform 3, and two transmission wheels 51, which are respectively mounted on the shaft ends of the drive motor 52 and the transverse rotating shaft 41. The transmission wheels 51 are connected by a transmission belt 53. When it is necessary to drive the rotating shaft seat 4 to rotate, the drive motor 52 drives the transmission wheels 51 to rotate, thereby driving the transverse rotating shaft 41 to rotate. In addition, the conversion platform 3 has a through groove 32 for accommodating the transmission wheels 51 and the transmission belt 53, and a detachable reinforcing block 33 is detachably connected at the opening of the through groove 32. The above structure provides the necessary space for the installation and operation of the drive mechanism 5, while the detachable reinforcing block 33 can strengthen the conversion platform 3 and prevent it from deforming due to the groove. Figure 3 As shown.

[0028] The rotating frame 1 includes a frame plate 11, with a vertical rotating shaft 12 rotatably connected at its center. A drive disc 13 and a connecting plate 14 are fixedly connected to its upper and lower ends, respectively. The drive disc 13 is used for transmission connection with the rotary cylinder 2, and the connecting plate 14 is used for fixed connection with the conversion platform 3. A connecting seat 31 that mates with the connecting plate 14 is fixedly provided on the upper surface of the conversion platform 3. When the rotary cylinder 2 operates, it can drive the vertical rotating shaft 12 to rotate, thereby driving the conversion platform 3 connected to the connecting plate 14 to rotate and switch its orientation. Figure 2 As shown.

[0029] To match the cable laying with the moving structure, several wire harness clamps 15 arranged in a circular array are fixedly installed on the outer wall of the vertical rotating shaft 12. The cable of the drive mechanism 5 is spirally wound around the outside of the vertical rotating shaft 12 and does not adhere to the outer wall of the vertical rotating shaft 12. At the same time, the cable is placed in the wire harness clamps 15. This wiring method can prevent the cable from affecting the movement of the structure. At the same time, this arrangement allows the cable to have a certain amount of redundancy for stretching and contraction, so that it will not hinder the normal rotation of the conversion platform 3. Figure 2 As shown.

[0030] The replaceable fixture 6 includes a fixture base 61, on which are provided a plurality of guide rails 62 arranged in a circumferential array. Grippers 63 are slidably mounted in the guide rails 62, and a rotatable drive screw 64 is installed in the guide rails 62, threadedly connected to the grippers 63. The drive screw 64 drives the grippers 63 to move, thereby clamping and fixing the workpiece placed between the grippers 63. Additionally, a positioning cylinder 65 is provided at the center of the fixture base 61, which is threadedly connected to the fixture base 61 via a coupling 66 at its rear end. When clamping and fixing a cylindrical workpiece, the positioning cylinder 65 can form a support inside the cylindrical shell to prevent deformation of the shell, and also has a certain positioning function, such as... Figure 4 As shown.

[0031] The working principle and usage process of this utility model:

[0032] When it is necessary to fix the workpiece, the drive screw 64 drives the jaws 63 to move, thereby clamping and fixing the workpiece placed between the jaws 63. When clamping and fixing a cylindrical workpiece, the positioning cylinder 65 can form a support inside the cylinder to prevent the cylinder from being clamped and deformed, and also has a certain positioning function. When disassembling the workpiece, the above steps are reversed.

[0033] Rotatable rotating shaft seats 4 are provided at both ends of the conversion platform 3, and replaceable fixtures 6 for clamping workpieces are installed on them. Both rotating shaft seats 4 can rotate independently under the action of the drive mechanism 5, so that the workpiece can rotate to face any face of the processing tool, thus meeting more complex processing requirements. The above driving principle is that when it is necessary to drive the rotating shaft seat 4 to rotate, the drive motor 52 drives the transmission wheel 51 to rotate, thereby driving the transverse rotating shaft 41 to rotate.

[0034] The rotary cylinder 2 can drive the rotating frame 1 to rotate, so that the conversion table 3 can rotate horizontally to switch orientations, allowing the workpieces to be processed on different replaceable fixtures 6 to face the processing tool, so that the installation and processing of the workpieces can be carried out simultaneously, thereby significantly improving the processing efficiency of the workpieces. The above driving principle is specifically manifested in that when the rotary cylinder 2 is working, it can drive the vertical rotating shaft 12 to rotate, thereby driving the conversion table 3 connected to the connecting plate 14 to rotate and switch its orientation.

[0035] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A positioning fixture for a four-axis machining center, characterized in that, include: A rotating frame (1) is mounted on which a rotary cylinder (2) is installed. The rotary cylinder (2) is used to drive the rotating frame (1) to rotate. The conversion platform (3) is installed at the bottom of the rotating frame (1), and the rotating frame (1) can drive the conversion platform (3) to rotate. The rotating shaft seat (4) is provided in two sets, which are respectively rotatably installed at both ends of the conversion platform (3), and the outer ends are fixedly connected to the replaceable fixture (6) for clamping the workpiece. The drive mechanism (5) is mounted on the conversion platform (3) to drive the rotating shaft seat (4) to rotate.

2. The positioning fixture for a four-axis machining center according to claim 1, characterized in that: The rotating shaft seat (4) includes a transverse rotating shaft (41) rotatably mounted in the conversion platform (3), with a connecting plate (42) fixedly connected to its outer end.

3. The positioning fixture for a four-axis machining center according to claim 2, characterized in that: The drive mechanism (5) includes a drive motor (52) mounted on the lower end face of the conversion platform (3), and two transmission wheels (51) mounted on the shaft ends of the drive motor (52) and the transverse rotating shaft (41), respectively, and the transmission wheels (51) are connected by a transmission belt (53).

4. The positioning fixture for a four-axis machining center according to claim 3, characterized in that: The conversion platform (3) has a through groove (32) for accommodating the transmission wheel (51) and the transmission belt (53), and a detachable reinforcing block (33) is detachably connected at the opening of the through groove (32).

5. The positioning fixture for a four-axis machining center according to claim 1, characterized in that: The rotating frame (1) includes a frame plate (11), a vertical rotating shaft (12) is installed at its center, and a drive disk (13) and a connecting plate (14) are fixedly connected at its upper and lower ends, respectively. The drive disk (13) is used to drive the rotary cylinder (2), and the connecting plate (14) is used to fix the conversion platform (3). The upper surface of the conversion platform (3) is fixedly provided with a connecting seat (31) that cooperates with the connecting plate (14).

6. The positioning fixture for a four-axis machining center according to claim 5, characterized in that: The outer wall of the vertical shaft (12) is fixedly provided with a number of wire harness hoops (15) arranged in a circular array. The cable of the drive mechanism (5) is spirally wound around the outside of the vertical shaft (12) and does not fit against the outer wall of the vertical shaft (12). At the same time, the cable is located in the wire harness hoop (15).

7. The positioning fixture for a four-axis machining center according to claim 1, characterized in that: The replaceable fixture (6) includes a fixture base (61) on which a plurality of guide rails (62) arranged in a circular array are provided. A gripper (63) is slidably installed in the guide rail (62), and a rotatable drive screw (64) is installed in the guide rail (62) and threadedly connected to the gripper (63).

8. The positioning fixture for a four-axis machining center according to claim 7, characterized in that: The clamp seat (61) is provided with a positioning cylinder (65) at the center, which is threadedly connected to the clamp seat (61) through a connecting shaft (66) provided at the rear end.

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