A flipping mechanism for CNC machining of hardware parts

Abstract

A flipping mechanism for CNC machining of hardware parts, relating to the field of flipping devices, includes a fixed base, a lifting component, a rotating component, and a fixture. The lifting component is fixedly connected to the edge of the upper surface of the fixed base. The lifting end of the lifting component is fixedly connected to the fixed end of the rotating component, and the rotating end of the rotating component is fixedly connected to the fixed end of the fixture. A chuck locking component is provided inside the fixture, with its fixed end fixedly connected to the fixture. The control end of the chuck locking component is connected to the chuck adjustment component of the fixture. A positioning component is provided on the fixed base, with its fixed end located below the fixture and fixedly connected to the upper surface of the fixed base. The movable end of the positioning component is connected to the starting end of the chuck locking component. The beneficial effect is that it avoids the reduction in machining accuracy caused by weakened clamping force due to vibration after machining the first surface of the fixture, and the resulting positioning deviation on the second surface of the fixture after flipping.

Description

Technical Field

[0001] This utility model relates to the field of flipping device technology, and in particular to a flipping mechanism for CNC machining of hardware parts. Background Technology

[0002] As is commonly known, hardware refers to tools made from metals such as gold, silver, copper, iron, and tin through processing and casting, used for fixing things, processing things, decoration, etc. CNC lathes are among the most widely used CNC machine tools. They are mainly used for cutting the inner and outer cylindrical surfaces, inner and outer conical surfaces with arbitrary cone angles, complex rotating inner and outer curved surfaces, and cylindrical and conical threads of shaft or disc-shaped parts. They can also perform grooving, drilling, reaming, boring, and other machining operations.

[0003] Chinese patent CN222711546U discloses a flipping device for CNC precision machining of hardware parts. This device includes a machining panel, with a first support column welded and fixed to one end of the top surface of the machining panel. A second support column, symmetrical to the first support column, is slidably connected to the top of the machining panel. Symmetrical fixing members are rotatably connected to the side walls of both the first and second support columns via bearings. However, in actual use, the following problems still exist:

[0004] During CNC machining, when the first side of the fixture is machined and needs to be rotated 180° to machine the second side, a rotating device is used to directly rotate the fixture. Conventionally, the fixture is manually rotated to remove it, and then clamped again. However, using a rotating device directly rotates the fixture. The vibration generated during the CNC machining of the first side is transmitted to the threaded rod, weakening the clamping force of the fixture. When the rotating device directly rotates the fixture, the clamping force is weakened, resulting in a decrease in the CNC machining accuracy when machining the second side of the fixture.

[0005] Therefore, a flipping mechanism for CNC machining of hardware parts is proposed. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a flipping mechanism for CNC machining of hardware parts.

[0007] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0008] A flipping mechanism for CNC machining of hardware parts includes a fixed base, a lifting component, a rotating component, and a clamp. The lifting component is fixedly connected to the upper surface edge of the fixed base. The lifting end of the lifting component is fixedly connected to the fixed end of the rotating component. The rotating end of the rotating component is fixedly connected to the fixed end of the clamp. A chuck locking component is provided inside the clamp. The fixed end of the chuck locking component is fixedly connected to the clamp inside the clamp. The control end of the chuck locking component is connected to the chuck adjustment component of the clamp. A positioning component is provided on the fixed base. The fixed end of the positioning component is located below the clamp and fixedly connected to the upper surface of the fixed base. The movable end of the positioning component is connected to the starting end of the chuck locking component.

[0009] The clamp includes a fixed base, a chuck block, a chuck slider, a chuck adjusting block, and a bidirectional threaded rod. The fixed base is fixedly connected to the rotating end of the rotating component. Two chuck blocks and two chuck sliders are provided. A chuck sliding groove is provided on the side of the fixed base away from the rotating component. The chuck slider is located within the chuck sliding groove and slidably connected to the fixed base. The chuck slider is fixedly connected to the chuck block, and the chuck block is slidably connected to the outer wall of the fixed base. The bidirectional threaded rod is located within the chuck sliding groove and rotates with the fixed base. The upper thread of the bidirectional threaded rod rotates in the opposite direction to the lower thread. The chuck slider has an internal threaded hole, and the two chuck sliders are threadedly connected to the upper and lower parts of the bidirectional threaded rod, respectively. The fixed base has a through hole, and one end of the bidirectional threaded rod passes through the through hole of the fixed base and is fixedly connected to the chuck adjusting block. The chuck adjusting block is movably connected to the fixed base. The control end of the chuck locking component is located in the chuck sliding groove and connected to the bidirectional threaded rod.

[0010] The clamp locking component includes a lock head, a control slider, a first limiting plate, a connecting rod, a locking spring, and an actuating slider. The fixed base has a locking groove that communicates with the sliding groove of the clamp. The locking end of the lock head is connected to the bidirectional threaded rod and contacts the fixed base. The control end of the lock head is connected to the control slider, which is slidably connected to the fixed base within the locking groove. The end of the control slider away from the lock head is fixedly connected to the actuating slider via the connecting rod. The first limiting plate is fixedly connected to the fixed base within the locking groove and has a through hole. The connecting rod is slidably connected to the first limiting plate within the through hole. The actuating slider is fixedly connected to the first limiting plate via the locking spring surrounding the connecting rod. The upper and lower surfaces of the end of the actuating slider away from the lock head are both inclined, and this end is connected to the movable end of the positioning component.

[0011] The lock head includes a lock head ring, a lock head block, a lock head rod, and locking protrusions. One side of the lock head ring contacts the fixed base, and the other side of the lock head ring is fixedly connected to the lock head block. There are two lock head blocks, which are evenly distributed around the axis of the lock head ring. The surface of the lock head block that contacts the bidirectional threaded rod is an arc-shaped surface, and the arc-shaped surface of the lock head block corresponds to the shape of the bidirectional threaded rod. Several locking protrusions are fixedly connected to the lock head block, and the locking protrusions are evenly distributed on the arc-shaped surfaces of the two lock head blocks. The locking protrusions on the two lock head blocks respectively contact the upper thread and the lower thread of the bidirectional threaded rod. An arc-shaped sliding groove is inclinedly provided on the inner wall of the lock head ring. The inner wall of the lock head ring is movably connected to the control slider. One end of the lock head rod is fixedly connected to the control slider, and the other end of the lock head rod is located in the arc-shaped sliding groove and slidably connected to the lock head ring.

[0012] The positioning component includes a positioning rod and a positioning assembly. The fixed base has two positioning grooves, located on the upper and lower surfaces of the fixed base respectively. One end of each positioning groove communicates with the outside, and the other end communicates with the locking groove. Two positioning assemblies are provided, each located within one of the two positioning grooves and connected to the fixed base. The fixed end of the positioning rod is fixedly connected to the upper surface of the fixed base. The position of the positioning rod corresponds to the position of the positioning groove, and the shape of the opening at the point where the positioning groove communicates with the outside corresponds to the shape of the positioning rod. The movable end of the positioning rod is connected to one end of the positioning assembly, and the other end of the positioning assembly is connected to the end of the starting slider away from the lock head.

[0013] The positioning assembly includes a second limiting plate, a first pushing rod, a second pushing rod, a blocking plate, and a positioning spring. The second limiting plate is located at the connection between the positioning slide groove and the locking slide groove and is fixedly connected to the fixed seat. The second limiting plate has a through hole. The first pushing rod is located in the through hole of the second limiting plate and is slidably connected to the second limiting plate. One end of the first pushing rod away from the locking slide groove is connected to one side of the blocking plate. The other side of the blocking plate is connected to one end of the second pushing rod. The other end of the second pushing rod is in contact with the positioning rod. The blocking plate is slidably connected to the fixed seat. The blocking plate is fixedly connected to the fixed seat by the positioning spring surrounding the second pushing rod.

[0014] The second push rod is an adjustable rod with an adjustable length.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This is a flipping mechanism for CNC machining of hardware parts. During use, the positioning rod, in conjunction with the positioning component, ensures accurate positioning of both the first and second sides of the tooling after flipping, thereby improving the machining accuracy of the second side. The locking protrusions on the two locking blocks generate two opposing shear forces on the bidirectional threaded rod, which cancel each other out and lock the bidirectional threaded rod to prevent loosening. This avoids the reduction in machining accuracy caused by the weakening of the clamping force of the fixture due to vibration after machining the first side of the tooling, which would result in positioning deviation of the second side of the tooling after flipping. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the front structure of this utility model;

[0019] Figure 3 This utility model Figure 2 A magnified structural diagram of point A is shown below;

[0020] Figure 4 This is a cross-sectional structural diagram of the clamp of this utility model;

[0021] Figure 5 This utility model Figure 4 A schematic diagram of the cross-sectional structure at point B shown.

[0022] Figure 6 This utility model Figure 4 A schematic diagram of the cross-sectional structure at point C shown;

[0023] Figure 7This is a three-dimensional structural diagram of the lock head of this utility model;

[0024] Figure 8 This is a cross-sectional structural diagram of the lock head of this utility model.

[0025] 1. Fixed base; 2. Lifting component; 3. Rotating component; 4. Clamp; 5. Fixed seat; 6. Chuck block; 7. Chuck slider; 8. Chuck adjusting block; 9. Bidirectional threaded rod; 10. Chuck sliding groove; 11. Lock head; 12. Control slider; 13. First limiting plate; 14. Connecting rod; 15. Locking spring; 16. Starting slider; 17. Locking groove; 18. Lock head ring; 19. Lock head block; 20. Lock head rod; 21. Locking protrusion; 22. Arc-shaped groove; 23. Positioning rod; 24. Positioning groove; 25. Second limiting plate; 26. First push rod; 27. Second push rod; 28. Blocking plate; 29. ​​Positioning spring. Detailed Implementation

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0028] like Figure 1-4 As shown, a flipping mechanism for CNC machining of hardware parts includes a fixed base 1, a lifting component 2, a rotating component 3, and a clamp 4. The lifting component 2 is fixedly connected to the edge of the upper surface of the fixed base 1. The lifting end of the lifting component 2 is fixedly connected to the fixed end of the rotating component 3. The rotating end of the rotating component 3 is fixedly connected to the fixed end of the clamp 4. A chuck locking component is provided inside the clamp 4. The fixed end of the chuck locking component is fixedly connected to the clamp 4 inside the clamp 4. The control end of the chuck locking component is connected to the chuck adjustment component of the clamp 4. A positioning component is provided on the fixed base 1. The fixed end of the positioning component is located below the clamp 4 and fixedly connected to the upper surface of the fixed base 1. The movable end of the positioning component is connected to the starting end of the chuck locking component.

[0029] like Figure 2-4As shown, the clamp 4 includes a fixed base 5, a chuck block 6, a chuck slider 7, a chuck adjusting block 8, and a bidirectional threaded rod 9. The fixed base 5 is fixedly connected to the rotating end of the rotating component 3. Two chuck blocks 6 and two chuck sliders 7 are provided. A chuck sliding groove 10 is provided on the side of the fixed base 5 away from the rotating component 3. The chuck slider 7 is located within the chuck sliding groove 10 and slidably connected to the fixed base 5. The chuck slider 7 is fixedly connected to the chuck block 6, and the chuck block 6 is slidably connected to the outer wall of the fixed base 5. The bidirectional threaded rod 9 is located within the chuck sliding groove 10 and is fixedly connected to the fixed base 5. The fixed seat 5 is rotatably connected. The rotation direction of the thread on the upper part of the bidirectional threaded rod 9 is opposite to that of the thread on the lower part of the bidirectional threaded rod 9. The chuck slider 7 is provided with an internal threaded hole. The two chuck sliders 7 are respectively threadedly connected to the upper part and the lower part of the bidirectional threaded rod 9. The fixed seat 5 is provided with a through hole. One end of the bidirectional threaded rod 9 passes through the through hole of the fixed seat 5 and is fixedly connected to the chuck adjusting block 8. The chuck adjusting block 8 is movably connected to the fixed seat 5. The control end of the chuck locking component is located in the chuck sliding groove 10 and connected to the bidirectional threaded rod 9.

[0030] like Figure 4-6 As shown, the chuck locking component includes a lock head 11, a control slider 12, a first limiting plate 13, a connecting rod 14, a locking spring 15, and an actuating slider 16. The fixed base 5 has a locking groove 17, which communicates with the chuck sliding groove 10. The locking end of the lock head 11 is connected to the bidirectional threaded rod 9. The lock head 11 is in contact with the fixed base 5. The control end of the lock head 11 is connected to the control slider 12. The control slider 12 is located within the locking groove 17 and slidably connected to the fixed base 5. The end of the control slider 12 furthest from the lock head 11 is connected to... The connecting rod 14 is fixedly connected to the starting slider 16. The first limiting plate 13 is located in the locking groove 17 and fixedly connected to the fixed seat 5. The first limiting plate 13 is provided with a through hole. The connecting rod 14 is located in the through hole of the first limiting plate 13 and is slidably connected to the first limiting plate 13. The starting slider 16 is fixedly connected to the first limiting plate 13 through the locking spring 15 surrounding the connecting rod 14. The upper and lower surfaces of the end of the starting slider 16 away from the lock head 11 are both inclined surfaces, and the end of the starting slider 16 away from the lock head 11 is connected to the movable end of the positioning component.

[0031] like Figure 7 and Figure 8As shown, the lock head 11 includes a lock head ring 18, a lock head block 19, a lock head rod 20, and locking protrusions 21. One side of the lock head ring 18 contacts the fixing seat 5, and the other side of the lock head ring 18 is fixedly connected to the lock head block 19. There are two lock head blocks 19, which are evenly distributed around the axis of the lock head ring 18. The surface of the lock head block 19 that contacts the bidirectional threaded rod 9 is an arc-shaped surface, and the arc-shaped surface of the lock head block 19 corresponds to the shape of the bidirectional threaded rod 9. Several locking protrusions are fixedly connected to the lock head block 19. The locking protrusions 21 are evenly distributed on the arc-shaped surfaces of the two locking blocks 19. The locking protrusions 21 on the two locking blocks 19 are in contact with the upper thread and the lower thread of the bidirectional threaded rod 9, respectively. An arc-shaped groove 22 is inclinedly provided on the inner wall of the locking ring 18. The inner wall of the locking ring 18 is movably connected to the control slider 12. One end of the locking rod 20 is fixedly connected to the control slider 12, and the other end of the locking rod 20 is located in the arc-shaped groove 22 and is slidably connected to the locking ring 18.

[0032] like Figure 4 and Figure 6 As shown, the positioning component includes a positioning rod 23 and a positioning assembly. The fixed base 5 is provided with two positioning grooves 24, which are located on the upper and lower surfaces of the fixed base 5 respectively. One end of the positioning groove 24 is connected to the outside, and the other end of the positioning groove 24 is connected to the locking groove 17. There are two positioning assemblies, which are located in the two positioning grooves 24 and connected to the fixed base 5 respectively. The fixed end of the positioning rod 23 is fixedly connected to the upper surface of the fixed base 1. The position of the positioning rod 23 corresponds to the position of the positioning groove 24, and the shape of the opening at the point where the positioning groove 24 communicates with the outside corresponds to the shape of the positioning rod 23. The movable end of the positioning rod 23 is connected to one end of the positioning assembly, and the other end of the positioning assembly is connected to the end of the starting slider 16 away from the lock head 11.

[0033] like Figure 4 and Figure 6 As shown, the positioning assembly includes a second limiting plate 25, a first pushing rod 26, a second pushing rod 27, a blocking plate 28, and a positioning spring 29. The second limiting plate 25 is located at the connection between the positioning slide groove 24 and the locking slide groove 17 and is fixedly connected to the fixed seat 5. The second limiting plate 25 has a through hole. The first pushing rod 26 is located in the through hole of the second limiting plate 25 and is slidably connected to the second limiting plate 25. One end of the first pushing rod 26 away from the locking slide groove 17 is connected to one side of the blocking plate 28. The other side of the blocking plate 28 is connected to one end of the second pushing rod 27. The other end of the second pushing rod 27 is in contact with the positioning rod 23. The blocking plate 28 is slidably connected to the fixed seat 5. The blocking plate 28 is fixedly connected to the fixed seat 5 by the positioning spring 29 surrounding the second pushing rod 27.

[0034] like Figure 4 and Figure 6As shown, the second push rod 27 is an adjustable rod with an adjustable length.

[0035] The work process is as follows:

[0036] S1, During operation, the fixed base 1 is fixed on the operating table of the CNC machining center. The rotating chuck adjustment block 8 drives the bidirectional threaded rod 9 to rotate, causing the threaded chuck slider 7 to slide towards the chuck block 6, thus fixing the tooling to be processed. The lifting component 2 is activated, causing the fixture 4 to slide downwards. The positioning rod 23 slides into the positioning groove 24 of the fixture 4's fixed base 5, lifting the second push rod 27 and simultaneously stretching the positioning spring 29. The second push rod 27 drives the blocking plate 28 to slide. When the blocking plate 28 contacts the second limit plate 25, positioning is successful. The CNC machining center is then started to process the tooling. After the first side of the tooling is processed, the lifting component... Part 2 drives the fixture 4 to slide upwards. After reaching the flip-able position, the rotating part 3 is activated to make the fixture 4 rotate the tooling 180°. Then, the lifting part 2 drives the fixture 4 to slide downwards. The positioning rod 23 slides into another positioning groove 24, pushes up another second push rod 27, and stretches another positioning spring 29. When another blocking plate 28 contacts another second limit plate 25, the positioning is successful. The CNC machining center is started to process the second side of the tooling. Through the positioning rod 23 and the positioning component, the positioning accuracy of the first side of the tooling is ensured, and the positioning accuracy of the second side of the tooling after flipping is also ensured, thus improving the machining accuracy of the second side of the tooling after flipping.

[0037] S2, when positioning the tooling, the blocking plate 28 pushes the first push rod 26 through the through hole of the second limiting plate 25, pressing the inclined surface on the starting slider 16. The starting slider 16, in conjunction with the first limiting plate 13, compresses the locking spring 15 and slides in the locking groove 17 toward the direction of the bidirectional threaded rod 9. The starting slider 16 pushes the control slider 12 to slide through the connecting rod 14. The locking head rod 20 fixedly connected to the control slider 12 slides in the arc-shaped groove 22 in the locking head ring 18. At this time, the locking head ring 18 rotates around the control slider 12, causing the locking protrusions 21 on the two locking head blocks 19 to... The two locking blocks 19 are respectively locked onto the threads on the upper and lower parts of the bidirectional threaded rod 9. When the positioning is successful, the bidirectional threaded rod 9 is locked by the locking protrusion 21 on the locking head block 19. The CNC center is started to perform tooling machining. The vibration generated on the tooling during machining is transmitted to the bidirectional threaded rod 9. The vibration of the bidirectional threaded rod 9 generates two opposite shear forces on the locking protrusion 21 on the two locking head blocks 19, which cancel each other out and lock the bidirectional threaded rod 9 to prevent loosening. This avoids the reduction in machining accuracy caused by the weakening of the clamping force of the fixture 4 due to vibration after the first side of the tooling is machined, and the resulting positioning deviation on the second side of the tooling after flipping.

[0038] The second push rod 27 is made into an adjustable length rod. After flipping, the positioning plane of the second side of the tooling will be different from the positioning plane of the first side of the tooling. Making the second push rod 27 into an adjustable length rod improves the adaptability of the mechanism.

[0039] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A turnover mechanism for CNC machining of hardware, comprising a fixed base (1), a lifting component (2), a rotating component (3) and a clamp (4), the upper surface edge of the fixed base (1) is fixedly connected with the lifting component (2), the lifting end of the lifting component (2) is fixedly connected with the fixed end of the rotating component (3), and the rotating end of the rotating component (3) is fixedly connected with the fixed end of the clamp (4), characterized in that: The clamp (4) is provided with a chuck locking component. The fixed end of the chuck locking component is fixedly connected to the clamp (4) inside the clamp (4). The control end of the chuck locking component is connected to the chuck adjustment component of the clamp (4). The fixed base (1) is provided with a positioning component. The fixed end of the positioning component is located below the clamp (4) and fixedly connected to the upper surface of the fixed base (1). The movable end of the positioning component is connected to the starting end of the chuck locking component. ​ 2. The flipping mechanism for CNC machining of hardware parts according to claim 1, characterized in that: The clamp (4) includes a fixed base (5), a chuck block (6), a chuck slider (7), a chuck adjusting block (8), and a bidirectional threaded rod (9). The fixed base (5) is fixedly connected to the rotating end of the rotating component (3). Two chuck blocks (6) and two chuck sliders (7) are provided. A chuck sliding groove (10) is provided on the side of the fixed base (5) away from the rotating component (3). The chuck slider (7) is located in the chuck sliding groove (10) and is slidably connected to the fixed base (5). The chuck slider (7) is fixedly connected to the chuck block (6), and the chuck block (6) is slidably connected to the outer wall of the fixed base (5). The bidirectional threaded rod (9) is located in the chuck sliding groove (6). 10) Rotatably connected to the fixed seat (5), the rotation direction of the upper thread of the bidirectional threaded rod (9) is opposite to the rotation direction of the lower thread of the bidirectional threaded rod (9), the chuck slider (7) is provided with an internal thread hole, the two chuck sliders (7) are respectively threaded to the upper part and the lower part of the bidirectional threaded rod (9), the fixed seat (5) is provided with a through hole, one end of the bidirectional threaded rod (9) passes through the through hole of the fixed seat (5) and is fixedly connected to the chuck adjusting block (8), the chuck adjusting block (8) is movably connected to the fixed seat (5), the control end of the chuck locking component is located in the chuck sliding groove (10) and connected to the bidirectional threaded rod (9).

3. The flipping mechanism for CNC machining of hardware parts according to claim 2, characterized in that: The clamp locking component includes a lock head (11), a control slider (12), a first limiting plate (13), a connecting rod (14), a locking spring (15), and an actuating slider (16). The fixed base (5) has a locking groove (17) that communicates with the clamp sliding groove (10). The locking end of the lock head (11) is connected to the bidirectional threaded rod (9). The lock head (11) is in contact with the fixed base (5). The control end of the lock head (11) is connected to the control slider (12). The control slider (12) is located within the locking groove (17) and slidably connected to the fixed base (5). One end of the control slider (12) away from the lock head (11) is connected via… The connecting rod (14) is fixedly connected to the starting slider (16). The first limiting plate (13) is located in the locking groove (17) and fixedly connected to the fixed seat (5). The first limiting plate (13) has a through hole. The connecting rod (14) is located in the through hole of the first limiting plate (13) and slidably connected to the first limiting plate (13). The starting slider (16) is fixedly connected to the first limiting plate (13) through the locking spring (15) surrounding the connecting rod (14). The upper and lower surfaces of the starting slider (16) away from the lock head (11) are both inclined surfaces, and the end of the starting slider (16) away from the lock head (11) is connected to the movable end of the positioning component.

4. The flipping mechanism for CNC machining of hardware parts according to claim 3, characterized in that: The lock head (11) includes a lock head ring (18), a lock head block (19), a lock head rod (20), and locking protrusions (21). One side of the lock head ring (18) is in contact with the fixed seat (5), and the other side of the lock head ring (18) is fixedly connected to the lock head block (19). There are two lock head blocks (19), and the lock head blocks (19) are evenly distributed around the axis of the lock head ring (18). The surface of the lock head block (19) in contact with the bidirectional threaded rod (9) is an arc-shaped surface, and the arc-shaped surface of the lock head block (19) corresponds to the shape of the bidirectional threaded rod (9). Several locking protrusions are fixedly connected to the lock head block (19). The locking protrusions (21) are evenly distributed on the arc-shaped surfaces of the two locking blocks (19). The locking protrusions (21) on the two locking blocks (19) are in contact with the upper thread and the lower thread of the bidirectional threaded rod (9), respectively. An arc-shaped groove (22) is inclinedly provided on the inner wall of the locking ring (18). The inner wall of the locking ring (18) is movably connected to the control slider (12). One end of the locking rod (20) is fixedly connected to the control slider (12), and the other end of the locking rod (20) is located in the arc-shaped groove (22) and slidably connected to the locking ring (18).

5. A flipping mechanism for CNC machining of hardware parts according to claim 3, characterized in that: The positioning component includes a positioning rod (23) and a positioning assembly. The fixed base (5) is provided with two positioning grooves (24). The positioning grooves (24) are located on the upper and lower surfaces of the fixed base (5). One end of the positioning groove (24) is connected to the outside, and the other end of the positioning groove (24) is connected to the locking groove (17). There are two positioning assemblies, and the positioning assemblies are located in the two positioning grooves (24) and connected to the fixed base (5). The fixed end of the positioning rod (23) is fixedly connected to the upper surface of the fixed base (1). The position of the positioning rod (23) corresponds to the position of the positioning groove (24), and the shape of the opening at the connection between the positioning groove (24) and the outside corresponds to the shape of the positioning rod (23). The movable end of the positioning rod (23) is connected to one end of the positioning assembly, and the other end of the positioning assembly is connected to the end of the starting slider (16) away from the lock head (11).

6. A flipping mechanism for CNC machining of hardware parts according to claim 5, characterized in that: The positioning assembly includes a second limiting plate (25), a first pushing rod (26), a second pushing rod (27), a blocking plate (28), and a positioning spring (29). The second limiting plate (25) is located at the connection between the positioning slide groove (24) and the locking slide groove (17) and is fixedly connected to the fixed base (5). The second limiting plate (25) has a through hole. The first pushing rod (26) is located in the through hole of the second limiting plate (25) and is slidably connected to the second limiting plate (25). One end of the push rod (26) away from the locking groove (17) is connected to one side of the blocking plate (28), the other side of the blocking plate (28) is connected to one end of the second push rod (27), the other end of the second push rod (27) is in contact with the positioning rod (23), the blocking plate (28) is slidably connected to the fixed seat (5), and the blocking plate (28) is fixedly connected to the fixed seat (5) by the positioning spring (29) surrounding the second push rod (27).

7. A flipping mechanism for CNC machining of hardware parts according to claim 6, characterized in that: The second push rod (27) is an adjustable rod with adjustable length.

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