Turnover clamp for numerical control machining and use method of turnover clamp

Abstract

The invention discloses an overturning clamp for numerical control machining and a using method of the overturning clamp. The overturning clamp comprises a base; the base is arranged on a numerical control machining tool and is connected and fixed through bolts; the supporting assembly is arranged on the upper surface of the base, the rotating assembly is arranged on the supporting assembly, the limiting assembly is arranged on the supporting assembly, the bearing assembly is arranged on the rotating assembly, and the clamping assembly is arranged on the bearing assembly; the supporting assembly is used for supporting the rotating assembly, the rotating assembly is used for driving the bearing assembly to rotate, the limiting assembly is used for limiting the position of the bearing assembly after the bearing assembly completes rotation, the bearing assembly is used for bearing the clamping assembly, and the clamping assembly is used for clamping a machining material on the bearing assembly. The invention relates to the field of numerical control machining, fundamentally avoids possible safety accidents such as crushing injury and clamping injury when a heavy or sharp workpiece is turned over, and is relatively simple in structure and convenient to use.

Description

Technical Field

[0001] This invention relates to the field of CNC machining, specifically to a flipping fixture for CNC machining and its usage method. Background Technology

[0002] As the core of modern manufacturing, CNC machining technology has been widely used in aerospace, automobile manufacturing, mold processing, precision instruments and other fields. In multi-face machining scenarios (such as six-sided milling of box-type parts, double-sided boring of plate-type parts, and multi-angle machining of irregular-shaped parts), the workpiece needs to be flipped and positioned between different machining surfaces.

[0003] Traditional machining methods employ a cyclical pattern of "single-sided machining, disassembly, flipping, reclamping, and machining on the other side." Auxiliary processes such as workpiece flipping, reclamping, and alignment take up considerable time, severely restricting equipment utilization. The flipping process requires full operator involvement, including steps such as releasing the workpiece, manually flipping, cleaning the reference surface, repositioning, and clamping. This not only involves high labor intensity but also increases the risk of operational errors due to fatigue. There is also a risk of injury from crushing or pinching heavy workpieces during flipping. Therefore, to solve this problem, it is essential to design a flipping fixture for CNC machining and its operation and usage method. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a flipping fixture for CNC machining and its operation and usage method. It solves the problem of the traditional machining method's cyclical pattern of "single-sided machining, disassembly, flipping, reclamping, and machining on the other side." The auxiliary processes such as workpiece flipping, reclamping, and alignment take up a lot of time, which seriously restricts equipment utilization. The flipping process requires the operator's full participation, including steps such as releasing the workpiece, manually flipping, cleaning the reference surface, repositioning, and clamping. This not only involves high labor intensity but also easily leads to operational errors due to fatigue. There is also a risk of injury or pinching during the flipping of heavy workpieces.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flipping fixture for CNC machining, comprising: Base; The base is mounted on a CNC machine tool and is connected and fixed by bolts; Also includes: A support assembly disposed on the upper surface of the base, a rotating assembly disposed on the support assembly, a limiting assembly disposed on the support assembly, a load-bearing assembly disposed on the rotating assembly, and a clamping assembly disposed on the load-bearing assembly; The support component is used to support the rotating component, the rotating component is used to drive the bearing component to rotate, the limiting component is used to limit the position of the bearing component after it has completed rotation, the bearing component is used to support the clamping component, and the clamping component is used to clamp the processing material on the bearing component.

[0006] Preferably, the base includes: Annular base and two pairs of mounting structures; The two pairs of mounting structures are mounted on the annular base; The mounting structure includes: a limiting housing, fixing bolts, and a compression spring; The limiting housing is mounted on the annular base, the fixing bolt is mounted on the limiting housing and passes through the annular base, and the compression spring is fitted onto the fixing bolt.

[0007] Preferably, the support component includes: A pair of mounting bases, a pair of vertical support plates, and two pairs of reinforcing ribs; A pair of mounting bases are disposed on the upper surface of the annular base, each of the vertical support plates is disposed on the upper surface of the corresponding mounting base, each pair of reinforcing ribs is disposed on the corresponding vertical support plate, and the other end of each reinforcing rib is disposed on the upper surface of the annular base.

[0008] Preferably, the rotating assembly includes: Active part and passive part; The active part is disposed on one of the vertical support plates, and the driven part is disposed on the other vertical support plate.

[0009] Preferably, the active unit includes: Mounting bracket, rotary motor, connecting block, and two pairs of first triangular support blocks; The mounting bracket is disposed on the outer surface of one of the vertical support plates, the rotary motor is disposed on the upper surface of the mounting bracket and the rotating end of the rotary motor passes through the vertical support plate, the connecting block is disposed on the rotating end of the rotary motor, and two pairs of the first triangular support blocks are disposed on the side surface of the connecting block.

[0010] Preferably, the driven part includes: Limiting shell, limiting plate, rotating bearing, rotating block, and two pairs of second triangular support blocks; Another vertical support plate has a circular opening on its side surface. The limiting shell is located at the circular opening, the limiting plate is located on the limiting shell, the rotating bearing is located inside the limiting shell, the rotating block is located on the rotating bearing, and two pairs of second triangular support blocks are located on the side surface of the rotating block.

[0011] Preferably, the carrier component includes: Support housing; The bearing housing is disposed on the connecting block and the rotating block, and the bearing housing is connected to two pairs of first triangular support blocks and two pairs of second triangular support blocks; The supporting housing includes: A pair of horizontal support plates and a support connecting plate; One of the horizontal support plates is disposed on the connecting block, and the other horizontal support plate is disposed on the rotating block. The support connecting plate is disposed between the pair of horizontal support plates for connecting the pair of horizontal support plates.

[0012] Preferably, the limiting component includes: Two pairs of limiting parts; Each pair of limiting parts is provided on a corresponding vertical support plate, and each horizontal support plate is provided with a pair of grooves. The grooves of each limiting part match, and the limiting parts fix the bearing component after the bearing component rotates. The limiting part includes: Install support frame, electrically controlled telescopic rod and limit fixing block; The mounting support frame is disposed on the side surface of the vertical support plate, the electrically controlled telescopic rod is disposed on the mounting support frame and passes through the vertical support plate, and the limiting fixing block is disposed on the telescopic end of the electrically controlled telescopic rod.

[0013] Preferably, the clamping assembly includes: Two pairs of first clamping parts and two pairs of second clamping parts; Each pair of first clamping parts is disposed on the lower surface of the corresponding horizontal support plate, and each pair of second clamping parts is disposed on the upper surface of the corresponding horizontal support plate, and the first clamping parts and the second clamping parts are matched. The first clamping part includes: First clamping housing and first clamping plate; The first clamping plate is disposed on the first clamping housing; The second clamping part includes: L-shaped support plate, electrically controlled telescopic rod, and second clamping plate; The electrically controlled telescopic rod is mounted on the L-shaped support plate, the second clamping plate is mounted on the telescopic end of the electrically controlled telescopic rod, and the first clamping plate matches the second clamping plate.

[0014] A flipping fixture for CNC machining and its operation and usage method include the following steps: S1. The fixture is fixed on the CNC machine tool worktable through the annular base of the base and the mounting structure. The bearing component is in the initial horizontal position, and the clamping component is in the open state, waiting to clamp the workpiece. S2. Place the workpiece to be processed on the first clamping plate of the bearing assembly and press it against the preset positioning reference. S3. Start the control program. The second clamping part of the clamping assembly moves and drives the second clamping plate to move downward, together with the first clamping plate, to clamp the workpiece. S4. After confirming that the workpiece is clamped, the restriction component will automatically move and lock the load-bearing component. S5. Start the machining program. The machine tool will machine the first side of the workpiece. During the machining process, the limiting components will remain locked. S6. After the first surface is processed, the machine tool tool post retracts, and the limit fixing block of the limiting component retracts first to release the lock; S7. The rotary motor of the rotating component starts, precisely rotating 180° to flip the workpiece to the other side; S8. After flipping into place, the limiting component moves again, and the limiting fixing block is inserted into the corresponding groove to complete a new round of positioning and locking. S9. After the workpiece is securely locked again, the machine tool begins to process the second side; S10. After all processing is completed, the clamping components will automatically release, and the operator can safely remove the finished workpiece, completing one work cycle. Beneficial effects

[0015] This invention provides a flipping fixture for CNC machining and its operation and usage method. It offers the following advantages: This flipping fixture for CNC machining and its usage method allow for better flipping and clamping. Through the coordinated work of the support component, rotating component, and limiting component, the fixture achieves precise positioning and rigid locking after flipping, effectively suppressing vibration and displacement during machining. This ensures high repeatability and positioning accuracy of the workpiece after flipping, meeting precision machining requirements. The compression spring designed in the base helps absorb vibrations generated during machine tool processing, reducing adverse effects on the workpiece surface quality. The flipping is driven by a rotary motor (e.g., precise rotation of 90° or 180°) and automatically locked using an electrically controlled telescopic rod, replacing the traditional manual flipping and fixing method. This significantly shortens the auxiliary time required for workpiece changing, facilitating continuous processing of batch workpieces, reducing the number of clamping operations, and automating workpiece flipping and locking. Operators only need to perform loading and unloading actions, eliminating the need for heavy manual labor. This not only significantly reduces the labor intensity of workers, but more importantly, it minimizes the contact between operators and moving parts of the machine tool, fundamentally avoiding safety accidents such as crushing and pinching injuries that may occur when flipping heavy or sharp workpieces. The structure is relatively simple and easy to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the working and usage method of a flipping fixture for CNC machining as described in this invention.

[0017] Figure 2 This is a front view structural diagram of the working and usage method of a flipping fixture for CNC machining as described in this invention.

[0018] Figure 3 This is a front view of the working and usage method of a flipping fixture for CNC machining as described in this invention.

[0019] Figure 4 This is a top view of the operation and usage method of a flipping fixture for CNC machining as described in this invention.

[0020] Figure 5 This is a side view of the operation and usage method of a flipping fixture for CNC machining as described in this invention.

[0021] In the picture: 1. Base; 2. Support assembly; 3. Rotation assembly; 4. Limiting assembly; 5. Bearing assembly; 6. Clamping assembly; Limiting housing 11, fixing bolt 12, compression spring 13, annular base 14; Mounting base 21, vertical support plate 22, reinforcing rib 23; Mounting bracket 31, rotary motor 32, connecting block 33, first triangular support block 34, limiting shell 35, limiting plate 36, rotating bearing 37, rotating block 38, second triangular support block 39; Mounting support frame 41, electrically controlled telescopic rod 42, limit fixing block 43 Support housing 51; Horizontal support plate 511, support connecting plate 512; First clamping housing 61, first clamping plate 62, L-shaped support plate 63, electrically controlled telescopic rod 64, second clamping plate 65. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-5The present invention provides a technical solution: a flipping fixture for CNC machining, comprising: a base 1, the base 1 being mounted on a CNC machine tool and connected and fixed by bolts; and further comprising: a support assembly 2 mounted on the upper surface of the base 1, a rotating assembly 3 mounted on the support assembly 2, a limiting assembly 4 mounted on the support assembly 2, a bearing assembly 5 mounted on the rotating assembly 3, and a clamping assembly 6 mounted on the bearing assembly 5. The support assembly 2 supports the rotating assembly 3, the rotating assembly 3 drives the bearing assembly 5 to rotate, the limiting assembly 4 limits the position of the bearing assembly 5 after it has rotated, the bearing assembly 5 supports the clamping assembly 6, and the clamping assembly 6 clamps the machining material on the bearing assembly 5.

[0024] The base 1 includes an annular base 14 and two pairs of mounting structures. The two pairs of mounting structures are set on the annular base 14. The mounting structures include a limiting housing 11, a fixing bolt 12, and a compression spring 13. The limiting housing 11 is set on the annular base 14, the fixing bolt 12 is set at the limiting housing 11 and passes through the annular base 14, and the compression spring 13 is fitted on the fixing bolt 12.

[0025] The base 1 adopts a ring-shaped base 14 structure, made of high-strength cast iron to ensure overall rigidity and stability. The upper surface of the ring-shaped base 14 is provided with four mounting structures, evenly distributed around the base 1. Each mounting structure includes a limiting housing 11 welded to the base, a fixing bolt 12 passing through the limiting housing 11 and the threaded hole of the base, and a compression spring 13 sleeved on the fixing bolt 12. By tightening the fixing bolt 12, the preload provided by the compression spring 13 can firmly fix the fixture on the T-slot of the CNC machine tool worktable, effectively resisting vibration during the machining process.

[0026] The support assembly 2 includes: a pair of mounting bases 21, a pair of vertical support plates 22, and two pairs of reinforcing ribs 23. The pair of mounting bases 21 are disposed on the upper surface of the annular base 14, each vertical support plate 22 is disposed on the upper surface of the corresponding mounting base 21, and each pair of reinforcing ribs 23 is disposed on the corresponding vertical support plate 22, with the other end of each reinforcing rib 23 disposed on the upper surface of the annular base 14.

[0027] The mounting base 21 is fixed to the upper surface of the annular base 14 by hexagonal socket head cap screws. Each vertical support plate 22 is bolted to the corresponding mounting base 21. The plate is made of quenched and tempered 45 steel. Each pair of reinforcing ribs 23 is welded between the vertical support plate 22 and the upper surface of the annular base 14, and is distributed in a triangular pattern, which significantly enhances the bending and torsional resistance of the support structure.

[0028] The rotating assembly 3 includes an active part and a driven part; the active part is disposed on one of the vertical support plates 22, and the driven part is disposed on the other vertical support plate 22.

[0029] The active part includes: a mounting frame 31, a rotary motor 32, a connecting block 33, and two pairs of first triangular support blocks 34. The mounting frame 31 is disposed on the outer surface of one of the vertical support plates 22. The rotary motor 32 is disposed on the upper surface of the mounting frame 31, and the rotating end of the rotary motor 32 passes through the vertical support plate 22. The connecting block 33 is disposed on the rotating end of the rotary motor 32, and the two pairs of first triangular support blocks 34 are disposed on the side surface of the connecting block 33.

[0030] The driven part includes: a limiting housing 11, a limiting plate 36, a rotating bearing 37, a rotating block 38, and two pairs of second triangular support blocks 39. Another vertical support plate 22 has a circular opening on its side surface. The limiting housing 35 is located at the circular opening. The limiting plate 36 is located on the limiting housing 35. The rotating bearing 37 is located inside the limiting housing 35. The rotating block 38 is located on the rotating bearing 37. The two pairs of second triangular support blocks 39 are located on the side surface of the rotating block 38.

[0031] The rotating assembly 3 includes an active part and a driven part. The active part is located on the outside of one of the vertical support plates 22 and includes a mounting bracket 31 connected by bolts. A rotary motor 32 is fixed on the mounting bracket 31. The rotary motor 32 can be a servo motor, and the model can be 130ST-M15015 to ensure rotational accuracy. The output shaft of the rotary motor 32 passes through a precision bearing hole in the middle of the vertical support plate 22 and is connected to a connecting block 33 through a keyway. Two pairs of first triangular support blocks 34 are welded to the side of the connecting block 33 facing the bearing assembly 5. The driven part is located on the other vertical support plate 22. A circular through hole is opened on the vertical support plate 22. A limiting housing 11 is fixed to the through hole by bolts. A rotating bearing 37 is installed in the limiting housing 11. The rotating bearing 37 can be a double-row cylindrical roller bearing such as NN30 series. A rotating block 38 is interference-fitted in the inner ring of the rotating bearing 37. Two pairs of second triangular support blocks 39 are also welded to the side surface of the rotating block 38.

[0032] The bearing assembly 5 includes a bearing housing 51, which is disposed on the connecting block 33 and the rotating block 38, and is connected to two pairs of first triangular support blocks 34 and two pairs of second triangular support blocks 39. The bearing housing 51 includes a pair of horizontal support plates 511 and a support connecting plate 512. One horizontal support plate 511 is disposed on the connecting block 33, and the other horizontal support plate 511 is disposed on the rotating block 38. The support connecting plate 512 is disposed between the pair of horizontal support plates 511 and is used to connect the pair of horizontal support plates 511.

[0033] The support assembly 5 is used to install the workpiece. Its core is a support housing 51, which is welded together by a pair of horizontal support plates 511 and a support connecting plate 512 to form a robust frame structure. One of the horizontal support plates 511 is connected to the connecting block 33 of the active part and its first triangular support block 34 by bolts. The other horizontal support plate 511 is connected to the rotating block 38 of the driven part and its second triangular support block 39. Each horizontal support plate 511 is also precisely machined with a pair of grooves for cooperating with the limiting assembly 4.

[0034] The limiting component 4 includes two pairs of limiting parts, each pair of limiting parts is set on the corresponding vertical support plate 22, and each horizontal support plate 511 has a pair of grooves. The grooves of each limiting part match. The limiting parts fix the bearing component 5 after it rotates. The limiting part includes a mounting support frame 41, an electrically controlled telescopic rod 42, and a limiting fixing block 43. The mounting support frame 41 is set on the side surface of the vertical support plate 22, the electrically controlled telescopic rod 42 is set on the mounting support frame 41 and passes through the vertical support plate 22, and the limiting fixing block 43 is set on the telescopic end of the electrically controlled telescopic rod 42.

[0035] The limiting component 4 includes two pairs of limiting parts, which are respectively set for the two vertical support plates 22. Each limiting part includes a mounting support frame 41 that is bolted to the inner surface of the vertical support plate 22, an electrically controlled telescopic rod 42 fixed on the mounting support frame 41, and a limiting fixing block 43 installed on the telescopic end of the electrically controlled telescopic rod 42. The electrically controlled telescopic rod 42 can be a miniature hydraulic cylinder with a stroke of 20mm or a high-precision electric push rod. When the bearing component 5 rotates to the target angle, such as 0° or 180°, the electrically controlled telescopic rod 42 pushes the limiting fixing block 43 to extend and precisely insert into the corresponding groove on the horizontal support plate 511 to achieve mechanical locking and ensure that the bearing component 5 does not move during processing.

[0036] The clamping assembly 6 includes two pairs of first clamping parts and two pairs of second clamping parts. Each pair of first clamping parts is disposed on the lower surface of the corresponding horizontal support plate 511, and each pair of second clamping parts is disposed on the upper surface of the corresponding horizontal support plate 511. The first clamping parts and the second clamping parts are matched. The first clamping part includes a first clamping housing 61 and a first clamping plate 62. The first clamping plate 62 is disposed on the first clamping housing 61. The second clamping part includes an L-shaped support plate 63, an electrically controlled telescopic rod 64, and a second clamping plate 65. The electrically controlled telescopic rod 64 is disposed on the L-shaped support plate 63, and the second clamping plate 65 is disposed on the telescopic end of the electrically controlled telescopic rod 64. The first clamping plate 62 and the second clamping plate 65 are matched.

[0037] The clamping assembly 6 includes two pairs of first clamping parts disposed on the lower surface of the horizontal support plate 511 and two pairs of second clamping parts disposed on the upper surface. The first clamping part mainly includes a first clamping housing 61 fixed by bolts and a first clamping plate 62 embedded thereon, the surface of which can be engraved with anti-slip texture. The second clamping part includes an L-shaped support plate 63 fixed by bolts, an electrically controlled telescopic rod 64 mounted on the L-shaped support plate 63, and a second clamping plate 65 connected to the telescopic end of the electrically controlled telescopic rod 64. The electrically controlled telescopic rod 64 can be a pneumatic finger cylinder or a servo electric cylinder. The working surfaces of the first clamping plate 62 and the second clamping plate 65 are both hardened and can be equipped with different shaped jaws to adapt to various workpieces.

[0038] A flipping fixture for CNC machining and its operation and usage method include the following steps: S1, the fixture is fixed to the CNC machining machine tool worktable by the annular base 14 of the base 1 and the mounting structure, the bearing component 5 is in a horizontal initial position, and the clamping component 6 is in an open state, waiting to clamp the workpiece; S2, the workpiece to be processed is placed on the first clamping plate 62 of the bearing component 5 and pressed against the preset positioning reference; S3, the control program is started, the second clamping part of the clamping component 6 is activated, driving the second clamping plate 65 to move downward, and together with the first clamping plate 62, clamps the workpiece; S4, after confirming that the workpiece is clamped, the limiting component 4 automatically moves to lock the bearing component 5; S5, the machining program is started. The machine tool processes the first side of the workpiece. During the processing, the limiting component 4 remains locked. S6: After the first side is processed, the machine tool tool post retracts, and the limiting fixing block 43 of the limiting component 4 retracts first, releasing the lock. S7: The rotary motor 32 of the rotating component 3 starts and rotates precisely 180° to flip the workpiece to the other side. S8: After flipping to the correct position, the limiting component 4 moves again, and the limiting fixing block 43 inserts into the corresponding groove, completing a new round of positioning and locking. S9: After the workpiece is securely locked again, the machine tool begins processing the second side. S10: After all processing is completed, the clamping component 6 automatically releases, and the operator can safely remove the finished workpiece, completing one work cycle.

[0039] First, the fixture is fixed to the CNC machining center worktable via the base 1, and its level and center position are corrected. The equipment is started, and the second clamping part of the clamping assembly 6 opens. The operator places the workpiece to be processed on the bearing assembly 5, ensuring its reference surface is close to the first clamping plate 62. A command is issued via the CNC system or an external control button, and the electrically controlled telescopic rod 64 of the second clamping part actuates, driving the second clamping plate 65 to move downwards. Together with the first clamping plate 62, the workpiece is securely clamped. The clamping force can be set via system parameters to prevent workpiece deformation. After the workpiece is clamped, the electrically controlled telescopic rod 42 of the limiting assembly 4 moves, and the limiting fixing block 43 is inserted into the groove, locking the bearing assembly 5 in its initial horizontal position. The CNC machine tool begins machining the upper surface of the workpiece. After the upper surface is machined, the machine tool tool post returns to the safe position. The limiting component 4 first retracts the limiting fixing block 43 and releases the lock. Then, the rotary motor 32 of the rotating component 3 receives the instruction and rotates precisely 180°. The rotation angle can be programmed and controlled by the control system, and is not limited to 180°. This drives the bearing component 5 and the workpiece to complete the flipping. After the flipping is in place, the limiting component 4 moves again, and the limiting fixing block 43 inserts into the corresponding groove to achieve a new round of precise positioning and locking. The machine tool starts and processes the other side of the workpiece. After all the processing is completed, the clamping component 6 automatically releases, and the operator can remove the finished workpiece, completing one processing cycle.

[0040] Example 2: A zero-point positioning system is integrated on the first clamping plate 62 and the second clamping plate 65 of the clamping assembly 6. For example, standardized ball locking pins and positioning holes are used. This allows for quick replacement of dedicated fixture modules, greatly shortening the preparation time for workpiece clamping. At the same time, a high-precision encoder can be connected to the rotary motor 32 and closed-loop control can be achieved with the CNC system to ensure that the repeatability of the flipping angle is stable within ±0.001°, meeting the requirements of ultra-precision machining.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flipping fixture for CNC machining, comprising: Base (1); The base (1) is mounted on a CNC machining tool and is connected and fixed by bolts; Its characteristic is that it further includes: A support assembly (2) is provided on the upper surface of the base (1), a rotating assembly (3) is provided on the support assembly (2), a limiting assembly (4) is provided on the support assembly (2), a bearing assembly (5) is provided on the rotating assembly (3), and a clamping assembly (6) is provided on the bearing assembly (5). The support component (2) is used to support the rotating component (3), the rotating component (3) is used to drive the bearing component (5) to rotate, the limiting component (4) is used to limit the position of the bearing component (5) after it has completed rotation, the bearing component (5) is used to support the clamping component (6), and the clamping component (6) is used to clamp the processing material on the bearing component (5).

2. The turnover fixture for numerical control machining according to claim 1, characterized in that, The base (1) includes: Annular base (14) and two pairs of mounting structures; The two pairs of mounting structures are mounted on the annular base (14); The mounting structure includes: a limiting housing (11), a fixing bolt (12), and a compression spring (13); The limiting housing (11) is set on the annular base (14), the fixing bolt (12) is set at the limiting housing (11), and the fixing bolt (12) passes through the annular base (14). The compression spring (13) is fitted on the fixing bolt (12).

3. The turnover fixture for numerically controlled machining according to claim 2, characterized in that, The support component (2) includes: A pair of mounting bases (21), a pair of vertical support plates (22), and two pairs of reinforcing ribs (23); A pair of mounting bases (21) are disposed on the upper surface of the annular base (14), each vertical support plate (22) is disposed on the upper surface of the corresponding mounting base (21), each pair of reinforcing ribs (23) is disposed on the corresponding vertical support plate (22), and the other end of each reinforcing rib (23) is disposed on the upper surface of the annular base (14).

4. The turnover fixture for numerically controlled machining according to claim 3, characterized in that, The rotating assembly (3) includes: Active part and passive part; The active part is disposed on one of the vertical support plates (22), and the driven part is disposed on the other vertical support plate (22).

5. The flip jig for CNC machining according to claim 4, wherein, The active unit includes: Mounting bracket (31), rotary motor (32), connecting block (33), and two pairs of first triangular support blocks (34); The mounting bracket (31) is disposed on the outer surface of one of the vertical support plates (22), the rotary motor (32) is disposed on the upper surface of the mounting bracket (31), and the rotating end of the rotary motor (32) passes through the vertical support plate (22). The connecting block (33) is disposed on the rotating end of the rotary motor (32), and two pairs of the first triangular support blocks (34) are disposed on the side surface of the connecting block (33).

6. A flipping fixture for CNC machining according to claim 4, characterized in that, The driven part includes: Limiting shell (35), limiting plate (36), rotating bearing (37), rotating block (38) and two pairs of second triangular support blocks (39); Another vertical support plate (22) has a circular opening on its side surface. The limiting shell (35) is located at the circular opening. The limiting plate (36) is located on the limiting shell (35). The rotating bearing (37) is located inside the limiting shell (35). The rotating block (38) is located on the rotating bearing (37). Two pairs of second triangular support blocks (39) are located on the side surface of the rotating block (38).

7. A flipping fixture for CNC machining according to claim 6, characterized in that, The carrier component (5) includes: Support housing (51); The bearing housing (51) is disposed on the connecting block (33) and the rotating block (38), and the bearing housing (51) is connected to two pairs of first triangular support blocks (34) and two pairs of second triangular support blocks (39); The supporting housing (51) includes: A pair of horizontal support plates (511) and a support connecting plate (512); One of the horizontal support plates (511) is disposed on the connecting block (33), and the other horizontal support plate (511) is disposed on the rotating block (38). The support connecting plate (512) is disposed between the pair of horizontal support plates (511) for connecting the pair of horizontal support plates (511).

8. The flip jig for CNC machining according to claim 7, wherein, The limiting component (4) includes: Two pairs of limiting parts; Each pair of limiting parts is set on the corresponding vertical support plate (22), and each horizontal support plate (511) is provided with a pair of grooves. The grooves of each limiting part match, and the limiting parts fix the bearing assembly (5) after the bearing assembly (5) rotates. The limiting part includes: Install the support frame (41), the electrically controlled telescopic rod (42), and the limiting fixing block (43); The mounting support frame (41) is set on the side surface of the vertical support plate (22), the electrically controlled telescopic rod (42) is set on the mounting support frame (41), and the electrically controlled telescopic rod (42) passes through the vertical support plate (22). The limiting fixing block (43) is set on the telescopic end of the electrically controlled telescopic rod (42).

9. The flip jig for CNC machining according to claim 7, wherein, The clamping assembly (6) includes: Two pairs of first clamping parts and two pairs of second clamping parts; Each pair of the first clamping parts is disposed on the lower surface of the corresponding horizontal support plate (511), and each pair of the second clamping parts is disposed on the upper surface of the corresponding horizontal support plate (511), and the first clamping parts and the second clamping parts are matched. The first clamping part includes: The first clamping housing (61) and the first clamping plate (62); The first clamping plate (62) is disposed on the first clamping housing (61); The second clamping part includes: L-shaped support plate (63), electrically controlled telescopic rod (64), and second clamping plate (65); The electrically controlled telescopic rod (64) is mounted on the L-shaped support plate (63), and the second clamping plate (65) is mounted on the telescopic end of the electrically controlled telescopic rod (64), and the first clamping plate (62) matches the second clamping plate (65).

10. A flip jig work for NC machining according to claim 1, characterized in that, Includes the following steps: S1. The fixture is fixed on the CNC machining machine tool worktable by the annular base (14) of the base (1) and the mounting structure. The bearing component (5) is in the horizontal initial position, and the clamping component (6) is in the open state, waiting to clamp the workpiece. S2. Place the workpiece to be processed on the first clamping plate (62) of the bearing assembly (5) and press it against the preset positioning reference; S3. Start the control program, the second clamping part of the clamping assembly (6) moves, driving the second clamping plate (65) to move downward, and together with the first clamping plate (62) clamp the workpiece; S4. After confirming that the workpiece is clamped, the limiting component (4) automatically moves to lock the bearing component (5). S5. Start the machining program. The machine tool processes the first side of the workpiece. During the machining process, the limiting component (4) remains locked. S6. After the first surface is processed, the machine tool tool post retracts, and the limiting fixing block (43) of the limiting component (4) retracts first to release the lock; S7. The rotary motor (32) of the rotating assembly (3) is started, and it rotates precisely 180° to flip the workpiece to the other side; S8. After flipping into place, the limiting component (4) moves again, and the limiting fixing block (43) is inserted into the corresponding groove to complete a new round of positioning and locking. S9. After the workpiece is securely locked again, the machine tool begins to process the second side; S10. After all processing is completed, the clamping assembly (6) will automatically release, and the operator can safely remove the finished workpiece to complete one work cycle.

Images