A fixture for five-axis machining

Abstract

The utility model belongs to the technical field of clamp especially is a kind of fixture for five-axis machining, including rotary table, the top of rotary table is equipped with protractor, the top of protractor is equipped with chuck mechanism, the top of chuck mechanism is equipped with centering vice fixed jack, the inboard of chuck mechanism is equipped with vice fixed mechanism, the top of chuck mechanism is connected with two-way centering vice device through centering vice fixed jack, the device can accurately, quickly position workpiece in the central position of two-way centering vice device top, facilitate centering work in the machining process, without relying on external measuring means (such as edge finder) and artificial calculation, eliminate measurement error from source, while improving workpiece in five-axis machining under multidirectional cutting force, traditional centering vice only from the direction of one axis to workpiece clamping, another axis lacks the limiting of workpiece, easily lead to workpiece along the direction of not being clamped " microshift", cause the problem of machining size out-of-tolerance.

Description

Technical Field

[0001] This utility model belongs to the field of fixture technology, specifically relating to a five-axis machining fixture. Background Technology

[0002] Five-axis machining fixtures are used for the rapid clamping, precise positioning, and stable clamping of workpieces on CNC five-axis machine tools (including swivel-head and swivel-table types) to complete multi-faceted and multi-angle cutting operations in a single clamping. Typical fixtures are mounted on rotary tables / indexing plates and use chucks or self-centering vises, T-slots, and locking bolts to achieve replaceable modular clamping. To ensure tool accessibility for five-sided machining, clamping units are often arranged along two orthogonal directions and symmetrical feed and centering are achieved through lead screw-gear or bevel gear transmissions.

[0003] Existing five-axis clamping vises commonly face a prominent structural technical problem in practical applications: insufficient coupling between clamping and centering functions, making it difficult to achieve reliable limiting and self-centering simultaneously along two orthogonal axes. Specifically, common structures primarily rely on self-centering clamping along one axis, while the other axis depends solely on passive limiting or secondary calibration. This leads to slight displacement or center offset of the workpiece under multi-directional cutting forces. Furthermore, on-machine alignment requires external measurement and repeated trial cuts, resulting in low efficiency in shape change and repositioning, increased cumulative errors, and impact on dimensional consistency. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a five-axis machining fixture that can accurately and quickly position the workpiece at the center of the top of the bidirectional centering vise device, facilitating centering during the machining process. It eliminates the need for external measuring methods (such as edge finders) and manual calculations, directly aligning the workpiece center with the vise center vertically without manual intervention, thus eliminating measurement errors at the source. Simultaneously, it improves the situation where the workpiece is subjected to multi-directional cutting forces in five-axis machining. Traditional centering vises only clamp the workpiece in one axis direction, lacking restraint in the other axis direction, which can easily lead to "micro-displacement" of the workpiece along the unclamped direction, causing dimensional errors in the machining process.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a five-axis machining fixture, including a rotary table, an indexing plate mounted on the top of the rotary table, a chuck mechanism on the top of the indexing plate, a centering vise fixing hole on the top of the chuck mechanism, a vise fixing mechanism on the inner side of the chuck mechanism, and a bidirectional centering vise device connected to the top of the chuck mechanism through the centering vise fixing hole. The bidirectional centering vise device includes a fixed vise body, a downward-facing groove on the top of the fixed vise body, a lead screw mounting seat inside the groove, and a first bidirectional centering vise device. The first bidirectional transmission screw is rotatably connected to a transmission screw. One end of the first bidirectional transmission screw is connected to a first gear. The first bidirectional transmission screw is threadedly connected to the movable clamp body. The fixed clamp body has telescopic grooves at both ends in the direction of the horizontal cross intersection with the groove. A second bidirectional transmission screw is rotatably installed on the inner side of the telescopic groove. A first bevel gear is fixedly sleeved on the outer side of the second bidirectional transmission screw. A telescopic centering gripper is slidably inserted into the inner side of the telescopic groove. The telescopic centering gripper is threadedly connected to the second bidirectional transmission screw. A drive mechanism is slidably inserted into the inner side of the fixed clamp body.

[0006] The beneficial effects of this utility model are as follows: This device can accurately and quickly position the workpiece at the center of the top of the bidirectional centering vise, which facilitates the centering work during the machining process. It does not require external measuring means such as edge finders and manual calculations. It directly makes the center of the workpiece coincide with the center of the vise without manual intervention, eliminating measurement errors from the source. At the same time, it improves the situation in five-axis machining where the workpiece is subjected to multi-directional cutting forces. Traditional centering vises only clamp the workpiece in one axis direction, and lack the limitation of the workpiece in the other axis direction, which can easily cause the workpiece to "micro-displace" in the direction that is not clamped, resulting in the problem of machining dimensions exceeding tolerance.

[0007] For secure mounting and quick disassembly / reassembly of the disc mechanism:

[0008] As a further improvement to the above technical solution: the top of the indexing plate is provided with a T-shaped groove, and a T-shaped block is slidably installed on the inner side of the T-shaped groove. Locking screw holes are provided through the top and bottom of the chuck mechanism and the T-shaped block. The chuck mechanism and the T-shaped block are locked and fixed by locking bolts connected to the locking screw holes.

[0009] The T-slots and T-blocks on the indexing plate are connected to bolts via locking screw holes, enabling secure fixing and quick assembly / disassembly of the chuck mechanism. This ensures the stability of the clamp and facilitates adjustment or replacement of different clamping modules, enhancing the adaptability and scalability of the device.

[0010] To secure the bidirectional centering vise device:

[0011] As a further improvement to the above technical solution: the vise fixing mechanism includes a rotating shaft disposed inside the chuck mechanism. The rotating shaft has two threads on its outer side, and the threads of the two threads are opposite in direction. The rotating shaft is threadedly connected to the transmission block. The top of the transmission block is provided with a fixing plate. One side of the fixing plate is provided with a limiting groove. One end of the rotating shaft is connected to a first internal hexagon connector.

[0012] Connect the hex wrench to the first internal hex connector, rotate the shaft, and through the transmission between the thread and the transmission block, drive the two sets of fixing plates to move closer to each other, so that the limiting groove on the fixing plate contacts and fits tightly with the fixing rod. At the same time, the fixing plate moves above the limiting protrusion, forming a limit on the limiting protrusion, thus completing the fixing of the bidirectional centering vise device.

[0013] To ensure smooth and stable movement of the clamps:

[0014] As a further improvement to the above technical solution: the inner sidewall of the groove is provided with a guide rail, and the guide rail is slidably connected to the movable clamp body.

[0015] The sliding fit between the guide rail and the movable clamp body ensures that the movable clamp body moves smoothly and steadily during movement, avoiding shaking or deviation, thereby improving clamping accuracy and service life.

[0016] To secure the fixing rod:

[0017] As a further improvement to the above technical solution: a fixing rod is connected to the bottom of the fixing clamp body, and a limiting protrusion is provided at the bottom of the fixing rod. The fixing rod is inserted into the fixing hole of the centering vise.

[0018] The limiting protrusion is used to cooperate with the fixing plate to fix the fixing rod, so that it is firmly inserted into the fixing hole of the centering vise.

[0019] To improve the fixing stability of the bidirectional centering vise device:

[0020] As a further improvement to the above technical solution: the limiting groove is semi-circular in shape, and its inner diameter is the same as that of the fixed insertion rod.

[0021] The beneficial effects of this improvement are: the semi-circular limiting groove matches the diameter of the fixed insertion rod, providing lateral support for the fixed insertion rod, bearing the radial force generated during processing, and improving the fixing stability of the bidirectional centering vise device.

[0022] To drive the telescopic centering gripper and movable clamp body for adjustment:

[0023] As a further improvement to the above technical solution: the driving mechanism includes a sliding shaft that is slidably inserted into the inside of the fixed clamp body, one end of the sliding shaft is connected to a second bevel gear, the outer side of the sliding shaft is fitted with a second gear, and the other end of the sliding shaft is connected to a second internal hexagon connector.

[0024] By sliding the sliding shaft, the second bevel gear and the second gear can be moved. When the sliding shaft slides to the innermost side, the second bevel gear can mesh with the first bevel gear. At this time, rotating the sliding shaft can drive the second bidirectional transmission screw to rotate, thereby driving the two sets of telescopic centering jaws to move towards or away from each other. When the sliding shaft slides to the outermost side, the second gear can mesh with the first gear. At this time, rotating the sliding shaft can drive the first bidirectional transmission screw to rotate, thereby driving the two sets of movable clamps to move towards or away from each other.

[0025] In summary, the beneficial effects of this case are as follows:

[0026] When clamping the workpiece, place the workpiece between the two sets of movable clamps and connect the hex wrench to the second internal hexagon connector. First, push the second internal hexagon connector towards the first bevel gear, so that the second bevel gear at one end meshes with the first bevel gear. Then, rotate the second internal hexagon connector to drive the sliding shaft to rotate, thereby driving the first bevel gear to rotate, which in turn drives the second bidirectional transmission screw to rotate. Through the threaded connection between the second bidirectional transmission screw and the telescopic centering jaws, the telescopic centering jaws are driven to slide along the telescopic groove and move closer to each other, so that the telescopic centering jaws clamp the workpiece from both ends in the X-axis direction. Then, pull the second internal hexagon connector outward, causing the sliding shaft to slide outward, so that the second bevel gear disengages from the first bevel gear and meshes with the first gear. Then, rotate the second internal hexagon connector to drive the second gear to rotate, driving the first gear and the first bidirectional transmission screw to rotate. Through the transmission between the first bidirectional transmission screw and the movable clamp, the second internal hexagon connector drives the first gear to rotate. Two sets of movable jaws approach each other, clamping the workpiece from both ends along the Y-axis. Through a sliding shaft and the second bevel gear and second gear, a single drive mechanism can adjust the movable jaws and telescopic centering jaws. Compared to centering vises that rely solely on the movable jaws for workpiece clamping, this device accurately and quickly positions the workpiece at the center of the bidirectional centering vise, facilitating centering during machining. It eliminates the need for external measuring tools (such as edge finders) and manual calculations, directly aligning the workpiece center with the vise center vertically without manual intervention, thus eliminating measurement errors at the source. Furthermore, it improves the performance of five-axis machining where the workpiece is subjected to multi-directional cutting forces. Traditional centering vises only clamp the workpiece along one axis, lacking restraint along the other, which can lead to "micro-displacement" of the workpiece along the unclamped direction, causing dimensional errors.

[0027] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the indexing plate and chuck mechanism in this utility model;

[0030] Figure 3 This is a schematic diagram of the indexing plate in this utility model;

[0031] Figure 4 This is a schematic diagram of the vise fixing mechanism in this utility model;

[0032] Figure 5 This is a schematic diagram showing the connection between the bidirectional centering vise device and the chuck mechanism in this utility model;

[0033] Figure 6 This is a cross-sectional schematic diagram (I) of the bidirectional centering vise device in this utility model;

[0034] Figure 7 This is a cross-sectional schematic diagram (II) of the bidirectional centering vise device in this utility model;

[0035] Figure 8 This is a cross-sectional structural diagram of the bidirectional centering vise device in this utility model;

[0036] In the diagram: 1. Turntable; 2. Indexing plate; 21. T-slot; 22. T-block; 3. Chuck mechanism; 31. Locking screw hole; 32. Centering vise fixing hole; 33. Vise fixing mechanism; 331. Shaft; 332. Thread; 333. Transmission block; 334. Fixing plate; 335. Limiting groove; 336. First internal hexagonal connector; 4. Bidirectional centering vise device; 411. Fixing vise body; 412. Guide... 413. Rail; 421. Lead screw mounting base; 422. First bidirectional transmission lead screw; 423. First gear; 444. Movable clamp body; 445. Telescopic groove; 446. Second bidirectional transmission lead screw; 447. First bevel gear; 448. Telescopic centering gripper; 459. Sliding shaft; 450. Second bevel gear; 451. Second gear; 452. Second internal hexagonal connector; 461. Fixed insertion rod; 462. Limiting protrusion. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0038] like Figure 1-8 As shown, a five-axis machining fixture includes a rotary table 1. An indexing plate 2 is mounted on the top of the rotary table 1. A chuck mechanism 3 is located on the top of the indexing plate 2. A centering vise fixing hole 32 is located on the top of the chuck mechanism 3. A vise fixing mechanism 33 is located inside the chuck mechanism 3. The top of the chuck mechanism 3 is connected to a bidirectional centering vise device 4 via the centering vise fixing hole 32. The bidirectional centering vise device 4 includes a fixed vise body 411. A downward-facing groove is formed on the top of the fixed vise body 411. A lead screw mounting seat 413 is located inside the groove. The lead screw mounting seat 413 is rotatably connected to a first bidirectional transmission lead screw 421. One end of the transmission screw 421 is connected to a first gear 422. The first bidirectional transmission screw 421 is threadedly connected to the movable clamp body 43. The fixed clamp body 411 has telescopic grooves 441 at both ends in the direction of the horizontal cross intersection with the groove. The inner side of the telescopic groove 441 is rotatably mounted with a second bidirectional transmission screw 442. The outer side of the second bidirectional transmission screw 442 is fixedly sleeved with a first bevel gear 443. The inner side of the telescopic groove 441 is slidably inserted with a telescopic centering gripper 445. The telescopic centering gripper 445 is threadedly connected to the second bidirectional transmission screw 442. The inner side of the fixed clamp body 411 is slidably inserted with a drive mechanism.

[0039] This device can accurately and quickly position the workpiece at the center of the top of the bidirectional centering vise device 4, facilitating centering during the machining process. It eliminates the need for external measuring methods such as edge finders and manual calculations, directly aligning the workpiece center with the vise center vertically without manual intervention, thus eliminating measurement errors at the source. At the same time, it improves the performance of the workpiece in five-axis machining when subjected to multi-directional cutting forces. Traditional centering vises only clamp the workpiece in one axis direction, lacking restraint in the other axis direction, which can easily lead to "micro-displacement" of the workpiece in the unclamped direction, causing dimensional deviations in the machining process.

[0040] The top of the indexing plate 2 is provided with a T-shaped groove 21, and a T-shaped block 22 is slidably installed on the inner side of the T-shaped groove 21. Locking screw holes 31 are provided through the top and bottom of the chuck mechanism 3 and the T-shaped block 22. The chuck mechanism 3 and the T-shaped block 22 are locked and fixed by locking bolts connected to the locking screw holes 31.

[0041] The T-slots 21 and T-blocks 22 on the indexing plate 2 are connected to bolts via locking screw holes 31, enabling the chuck mechanism 3 to be securely fixed and quickly disassembled. This ensures the stability of the clamp and facilitates the adjustment or replacement of different clamping modules, enhancing the adaptability and scalability of the device.

[0042] The vise fixing mechanism 33 includes a rotating shaft 331 disposed inside the chuck mechanism 3. The outer side of the rotating shaft 331 is provided with two threads 332, and the threads of the two threads 332 are opposite in direction. The rotating shaft 331 is threadedly connected to the transmission block 333 through the threads 332. The top of the transmission block 333 is provided with a fixing plate 334, and one side of the fixing plate 334 is provided with a limiting groove 335. One end of the rotating shaft 331 is connected to the first internal hexagon connector 336.

[0043] Using a hex wrench connected to the first internal hex connector 336, rotating the shaft 331, through the transmission between the thread 332 and the transmission block 333, drives the two sets of fixing plates 334 to move closer to each other, so that the limiting groove 335 on the fixing plate 334 contacts and fits tightly with the fixing rod 461. At the same time, the fixing plate 334 moves above the limiting protrusion 462, forming a limit on the limiting protrusion 462, thus completing the fixing of the bidirectional centering vise device 4.

[0044] The inner sidewall of the groove is provided with a guide rail 412, which is slidably connected to the movable clamp body 43.

[0045] The sliding fit between the guide rail 412 and the movable clamp 43 ensures that the movable clamp 43 moves smoothly and steadily, avoiding shaking or deviation, thereby improving clamping accuracy and service life.

[0046] The bottom of the fixing clamp body 411 is connected to a fixing rod 461, and the bottom of the fixing rod 461 is provided with a limiting protrusion 462. The fixing rod 461 is inserted into the fixing hole 32 of the centering vise.

[0047] The limiting protrusion 462 is used to cooperate with the fixing plate 334 to fix the fixing rod 461, so that it is firmly inserted into the centering vise fixing hole 32.

[0048] The limiting groove 335 is semi-circular in shape, and its inner diameter is the same as that of the fixed insertion rod 461.

[0049] The semi-circular limiting groove 335 matches the diameter of the fixed insertion rod 461, providing lateral support for the fixed insertion rod 461, bearing the radial force generated during processing, and improving the fixing stability of the bidirectional centering vise device 4.

[0050] The driving mechanism includes a sliding shaft 451 that is slidably inserted into the inner side of the fixed clamp body 411. One end of the sliding shaft 451 is connected to the second bevel gear 452, and the outer side of the sliding shaft 451 is fitted with a second gear 453. The other end of the sliding shaft 451 is connected to the second internal hexagon connector 454.

[0051] By sliding the sliding shaft 451, the second bevel gear 452 and the second gear 453 are moved. When the sliding shaft 451 slides to the innermost side, the second bevel gear 452 can mesh with the first bevel gear 443. At this time, rotating the sliding shaft 451 can drive the second bidirectional transmission screw 442 to rotate, thereby driving the two sets of telescopic centering jaws 445 to move towards or away from each other. When the sliding shaft 451 slides to the outermost side, the second gear 453 can mesh with the first gear 422. At this time, rotating the sliding shaft 451 can drive the first bidirectional transmission screw 421 to rotate, thereby driving the two sets of movable clamps 43 to move towards or away from each other.

[0052] The working principle and usage process of this utility model are as follows: The top surface of the indexing plate 2 is provided with a T-slot 21. The operator can slide the T-block 22 into it and place the chuck mechanism 3 on the indexing plate 2, aligning the locking screw holes 31 on it with the locking screw holes 31 on the T-block 22. Locking bolts are then used to connect and fix the chuck mechanism 3 to the locking screw holes 31 on the T-block 22, ensuring reliable fixation between the chuck mechanism 3 and the indexing plate 2. Subsequently, the fixing rod 461 at the bottom of the bidirectional centering vise device 4, along with the limiting protrusion 462, is inserted into the chuck mechanism. The centering vise is fixed in the top hole 32. Then, a hex wrench is used to connect with the first internal hex connector 336. The rotating shaft 331 is rotated. Through the transmission between the thread 332 and the transmission block 333, the two sets of fixing plates 334 are driven to move closer to each other, so that the limiting groove 335 on the fixing plate 334 contacts and fits tightly with the fixing rod 461. At the same time, the fixing plate 334 moves above the limiting protrusion 462, and limits the limiting protrusion 462, thus completing the fixing of the bidirectional centering vise device 4 and realizing the quick clamping of the bidirectional centering vise device 4.When clamping the workpiece, place the workpiece between the two sets of movable clamps 43, and connect the hex wrench to the second internal hexagon connector 454. First, push the second internal hexagon connector 454 towards the first bevel gear 443, so that the second bevel gear 452 at one end meshes with the first bevel gear 443. Then, rotate the second internal hexagon connector 454 to drive the sliding shaft 451 to rotate, thereby driving the first bevel gear 443 to rotate, which in turn drives the second bidirectional transmission screw 442 to rotate. This is achieved through the second bidirectional transmission screw 442 and the telescopic centering jaw 445. The threaded connection drives the telescopic centering jaws 445 to slide closer together along the telescopic groove 441, so that the telescopic centering jaws 445 clamp the workpiece from both ends in the X-axis direction. Then, the second internal hexagon connector 454 is pulled outward, causing the sliding shaft 451 to slide outward, so that the second bevel gear 452 disengages from the first bevel gear 443, and the second gear 453 meshes with the first gear 422. The second internal hexagon connector 454 can then be rotated to drive the second gear 453 to rotate, which in turn drives the first gear 422 and the first bidirectional transmission screw 421 to rotate. Through the transmission between the first bidirectional transmission screw 421 and the movable jaw 43, the two sets of movable jaws 43 are driven to move closer to each other, so that the movable jaws 43 clamp the workpiece from both ends in the Y-axis direction. By means of the sliding shaft 451 and the second bevel gear 452 and second gear 453, a single drive mechanism can meet the adjustment requirements of the movable jaws 43 and the telescopic centering jaws 445. Compared to a centering vise that relies solely on the movable jaws 43 to clamp and fix the workpiece, this device, through the cooperation of the movable jaws 43 and the telescopic centering jaws 445, provides a more efficient and effective clamping solution. This device can accurately and quickly position the workpiece at the center of the top of the bidirectional centering vise 4, facilitating centering during machining. It eliminates the need for external measuring methods (such as edge finders) and manual calculations, directly aligning the workpiece center with the vise center vertically without manual intervention. This eliminates measurement errors at the source and improves machining performance in five-axis machining where the workpiece is subjected to multi-directional cutting forces. Traditional centering vises only clamp the workpiece along one axis, lacking restraint along the other, which can lead to "micro-displacement" of the workpiece in the unclamped direction, causing dimensional errors.

[0053] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0054] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A five-axis machining fixture, characterized in that: The device includes a turntable (1), with an indexing plate (2) mounted on its top. A chuck mechanism (3) is located on the top of the indexing plate (2). A centering vise fixing hole (32) is located on the top of the chuck mechanism (3). A vise fixing mechanism (33) is located on the inner side of the chuck mechanism (3). The top of the chuck mechanism (3) is connected to a bidirectional centering vise device (4) via the centering vise fixing hole (32). The bidirectional centering vise device (4) includes a fixed vise body (411). A downward-facing groove is formed on the top of the fixed vise body (411). A lead screw mounting seat (413) is located inside the groove. The lead screw mounting seat (413) is rotatably connected to a first bidirectional transmission lead screw (421). One end of the rod (421) is connected to a first gear (422). The first bidirectional transmission screw (421) is threadedly connected to the movable clamp body (43). The fixed clamp body (411) has telescopic grooves (441) at both ends in the direction of the horizontal cross intersection with the groove. The inner side of the telescopic groove (441) is rotatably installed with a second bidirectional transmission screw (442). The outer side of the second bidirectional transmission screw (442) is fixedly sleeved with a first bevel gear (443). The inner side of the telescopic groove (441) is slidably inserted with a telescopic centering gripper (445). The telescopic centering gripper (445) is threadedly connected to the second bidirectional transmission screw (442). The inner side of the fixed clamp body (411) is slidably inserted with a drive mechanism.

2. The five-axis machining fixture according to claim 1, characterized in that: The indexing plate (2) has a T-slot (21) on its top, and a T-block (22) is slidably installed on the inner side of the T-slot (21). Locking screw holes (31) are provided between the top and bottom of the chuck mechanism (3) and the T-block (22). The chuck mechanism (3) and the T-block (22) are locked and fixed by locking bolts connected to the locking screw holes (31).

3. A five-axis machining fixture according to claim 1, characterized in that: The vise fixing mechanism (33) includes a rotating shaft (331) disposed inside the chuck mechanism (3). The rotating shaft (331) has two threads (332) on its outer side, and the threads of the two threads (332) are opposite in direction. The rotating shaft (331) is threadedly connected to the transmission block (333) through the threads (332). The top of the transmission block (333) is provided with a fixing plate (334). One side of the fixing plate (334) is provided with a limiting mating groove (335). One end of the rotating shaft (331) is connected to the first internal hexagonal connector (336).

4. A five-axis machining fixture according to claim 1, characterized in that: The inner sidewall of the groove is provided with a guide rail (412), and the guide rail (412) is slidably connected to the movable clamp body (43).

5. A five-axis machining fixture according to claim 1, characterized in that: The bottom of the fixing clamp body (411) is connected to a fixing rod (461), and the bottom of the fixing rod (461) is provided with a limiting protrusion (462). The fixing rod (461) is inserted into the fixing hole (32) of the centering vise.

6. The fixture of claim 3, wherein: The limiting groove (335) is semi-circular in shape, and its inner diameter is the same as that of the fixed insertion rod (461).

7. A five-axis machining fixture according to claim 1, characterized in that: The drive mechanism includes a sliding shaft (451) that is slidably inserted into the inside of the fixed clamp body (411). One end of the sliding shaft (451) is connected to a second bevel gear (452), and a second gear (453) is sleeved on the outside of the sliding shaft (451). The other end of the sliding shaft (451) is connected to a second internal hexagonal connector (454).

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