Hydraulic locking type rotating disc positioning device of numerical control punching machine

Abstract

The hydraulic locking type rotating disc positioning device of the numerical control press comprises a base, a supporting arm is installed on the top face of the base, and a hydraulic punching rod is installed at the top of the supporting arm; the rotating disc is rotationally installed on the base and is coaxial with the supporting arm, a plurality of workpiece clamping stations are arranged on the rotating disc, and clamping assemblies are arranged on the workpiece clamping stations; the turntable is driven by a first driving device to rotate; the multiple locking pieces are distributed on the peripheral side of the rotating disc and can slide relative to the base; the multiple locking pieces are driven by the locking driving assembly to synchronously move in the radial direction of the rotary disc so as to lock the rotary disc in the radial direction. And the axial positioning assembly is installed on the supporting arm, and the axial positioning assembly is used for axially locking the rotating disc. The positioning device provided by the utility model can perform radial and axial two-way positioning on the turntable, and can effectively reduce the risk of turntable deformation or locking piece abrasion.

Description

Technical Field

[0001] This disclosure generally relates to the field of hydraulic punching technology, and specifically to a hydraulic locking rotary table positioning device for a CNC punching machine. Background Technology

[0002] Hydraulic punch presses are crucial equipment in the metal processing field, and their positioning accuracy and processing efficiency directly affect workpiece forming quality and production efficiency. In existing technologies, hydraulic punch presses often employ a rotary table structure to achieve multi-station switching, thereby improving continuous processing capabilities. However, traditional rotary table positioning devices mostly rely on a single locking mechanism, fixing the rotary table through a single point or a few locking components. This design easily leads to uneven distribution of locking force, which, after long-term use, can cause rotary table deformation or wear of locking components, thus reducing positioning accuracy and increasing the risk of equipment failure. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a hydraulic locking rotary table positioning device for CNC punching machines to solve the above problems.

[0004] This application provides a hydraulic locking rotary table positioning device for a CNC punching machine, comprising:

[0005] A base, on the top surface of which a support arm is mounted, and a hydraulic punch is mounted on the top of the support arm;

[0006] A turntable is rotatably mounted on the base and coaxially arranged with the support arm. The turntable is provided with multiple workpiece clamping stations, and each workpiece clamping station is provided with a clamping assembly. The turntable is driven to rotate by a first driving device.

[0007] Multiple locking elements are distributed on the outer periphery of the turntable and are slidable relative to the base; the multiple locking elements are driven by a locking drive assembly to move synchronously along the radial direction of the turntable to radially lock the turntable.

[0008] An axial positioning component is mounted on the support arm and is used to axially lock the turntable.

[0009] According to the technical solution provided in the embodiments of this application, the outer periphery of the turntable is provided with a locking groove for the insertion of the locking member. The locking groove is a conical groove. The locking member is provided with a limiting slope corresponding to the locking groove, and the front end of the limiting slope is provided with a rounded transition.

[0010] According to the technical solution provided in the embodiments of this application, the base is provided with guide grooves in the same number as the locking members. The guide grooves extend along the radial direction of the turntable. A connecting rod is slidably installed in the guide groove, and one end of the connecting rod is fixedly connected to the locking member.

[0011] The locking drive assembly includes:

[0012] A drive disk is rotatably mounted inside the base. The drive disk is coaxially arranged with the turntable. The drive disk has arc-shaped grooves that correspond one-to-one with the guide grooves. The arc-shaped grooves cooperate with the guide grooves to allow the connecting rod to slide along the guide grooves.

[0013] The second driving device is used to drive the driving disk to rotate.

[0014] According to the technical solution provided in the embodiments of this application, the axial positioning assembly includes a plurality of pushing members, the pushing members are fixed on the side wall of the support arm, the pushing members are provided with a push rod that is retractable along the axial direction of the turntable, and a friction plate is installed on the free end of the push rod.

[0015] According to the technical solution provided in the embodiments of this application, the clamping component includes:

[0016] A pair of clamping plates, wherein the pair of clamping plates are U-shaped plates with their openings facing each other, and the two sides of the clamping plates are extended outward to increase the opening degree of the clamping plates;

[0017] A third driving device is used to drive the pair of clamping plates to move closer to or further apart from each other.

[0018] According to the technical solution provided in the embodiments of this application, the turntable is further provided with a counterweight component, which adjusts the weight distribution on the turntable based on the position and weight of the workpiece held by the clamping component.

[0019] According to the technical solution provided in the embodiments of this application, the counterweight component includes:

[0020] An annular groove is formed on the outer peripheral edge of the top surface of the turntable, and an annular guide rail is provided inside the annular groove.

[0021] Multiple counterweights are slidably mounted on the annular guide rail.

[0022] According to the technical solution provided in the embodiments of this application, the counterweight is provided with a locking pin, the locking pin passes through the counterweight and is threadedly connected to the counterweight, and the locking pin restricts the movement of the counterweight by abutting against the annular guide rail.

[0023] According to the technical solution provided in the embodiments of this application, a hard alloy wear-resistant sheet is embedded on the limiting inclined surface.

[0024] According to the technical solution provided in the embodiments of this application, a first bearing is provided between the turntable and the support arm, and a second bearing is provided between the rotation axis of the turntable and the drive disk.

[0025] Compared with the prior art, the beneficial effects of this application are as follows: By setting multiple workpiece clamping stations on the turntable and combining the first driving device to drive the turntable to rotate and switch stations, continuous production is achieved, downtime is reduced, and processing efficiency is improved; by setting multiple locking components, which are driven by the locking drive assembly to move synchronously along the radial direction of the turntable, the locking force is applied evenly, avoiding deformation or wear of the turntable due to uneven force at a single point, and also avoiding wear of the locking components, reducing the risk of locking mechanism failure and enhancing the overall reliability of the device; by setting the turntable and support arm coaxially, and distributing the locking components on the outer periphery of the turntable, the overall space utilization is high, which is suitable for the integration needs of CNC punching machines of different specifications; through the synergistic effect of the radial locking components and the axial positioning assembly, the turntable is simultaneously locked in both radial and axial directions, effectively suppressing the circumferential rotation and axial movement of the turntable during the stamping process, significantly improving the positioning accuracy and processing stability of the turntable, ensuring the consistency of workpiece stamping quality, and the radial locking and axial locking complement each other, so that even if one locking mechanism fails, the other mechanism can still provide basic positioning protection, improving the safety of equipment operation. Attached Figure Description

[0026] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0027] Figure 1 A schematic diagram of the hydraulic locking rotary table positioning device for the CNC punching machine provided in this application;

[0028] Figure 2 for Figure 1 A top view of the hydraulic locking rotary table positioning device of the CNC punching machine shown.

[0029] Figure 3 for Figure 1 A cross-sectional schematic diagram of the hydraulic locking rotary table positioning device of the CNC punching machine shown.

[0030] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0031] Figure 5 A schematic diagram showing the relative positions of the guide groove and the arc-shaped groove.

[0032] Reference numerals: 1. Base; 2. Support arm; 3. Hydraulic punch; 4. Turntable; 5. First drive device; 6. Locking component; 7. Locking groove; 8. Limiting slope; 9. Guide groove; 10. Connecting rod; 11. Drive disc; 12. Arc groove; 13. Second drive device; 14. Pushing component; 15. Push rod; 16. Friction plate; 17. Clamping plate; 18. Third drive device; 19. Annular groove; 20. Annular guide rail; 21. Counterweight; 22. First bearing; 23. Second bearing; 24. Locking pin; 25. Handle. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Please refer to Figures 1-5 This application provides a hydraulic locking rotary table positioning device for a CNC punch press, comprising:

[0036] A base 1, a support arm 2 is mounted on the top surface of the base 1, and a hydraulic punch 3 is mounted on the top of the support arm 2;

[0037] Turntable 4 is rotatably mounted on the base 1 and coaxially arranged with the support arm 2. The turntable 4 is provided with multiple workpiece clamping stations, and each workpiece clamping station is provided with a clamping assembly. The turntable 4 is driven to rotate by a first driving device 5.

[0038] Multiple locking elements 6 are distributed on the outer periphery of the turntable 4 and can slide relative to the base 1; the multiple locking elements 6 are driven by a locking drive assembly to move synchronously along the radial direction of the turntable 4 to radially lock the turntable 4.

[0039] An axial positioning component is mounted on the support arm 2 and is used to axially lock the turntable 4.

[0040] Specifically, the support arm 2 is located at the center of the base 1, and the hydraulic punch 3 is located on one side of the top of the support arm 2. The hydraulic punch 3 can extend and retract downwards to punch the workpiece. The turntable 4 is annular and is installed on the top of the base 1. The turntable 4 is sleeved on the outer periphery of the support arm 2 and is coaxially arranged with the support arm 2. Multiple clamping stations are evenly distributed around the top of the turntable 4. Each clamping station can hold a workpiece to be punched through a clamping assembly. In this embodiment, there are four clamping stations on the turntable 4. By rotating the turntable 4, the workpieces on different clamping stations can be rotated to below the hydraulic punch 3 so that the hydraulic punch 3 can punch the workpiece. The first driving device 5 is installed inside the base 1 and located on one side of the turntable 4. The first driving device 5 can be selected as a combination of a drive motor and a reducer. The reducer transmits power between the drive motor and the turntable 4. The drive motor drives the turntable 4 to rotate to realize the switching of clamping stations.

[0041] After the turntable 4 switches clamping positions, its position needs to be locked. In this embodiment, the turntable 4 is locked using both radial locking and axial locking. Radial locking is achieved through locking members 6; multiple locking members 6 are provided on the outer periphery of the turntable 4, mounted on the top of the base 1, and can slide relative to the top of the base 1 in the radial direction of the turntable 4. When locking the turntable 4 is required, the locking drive assembly drives the multiple locking members 6 to radially lock the turntable 4 on its outer periphery, preventing the rotation of the turntable 4 from affecting the stamping quality during the stamping process. Axial locking is achieved through an axial positioning assembly. After the turntable 4 switches positions, the axial positioning assembly axially presses the turntable 4, further locking it and preventing rotation. Axial locking also prevents the turntable 4 from shaking during the stamping process, thus avoiding any impact on the stamping quality.

[0042] This application uses multiple locking parts 6 and axial positioning components to lock the turntable 4 in multiple directions, which makes the locking effect of the turntable 4 better. At the same time, it can also avoid the failure of a single locking mechanism, which would cause the entire device to become unusable, thus improving the reliability of the device in dealing with emergencies.

[0043] Furthermore, the outer periphery of the turntable 4 is provided with a locking groove 7 for the insertion of the locking member 6. The locking groove 7 is a conical groove. The locking member 6 is provided with a limiting inclined surface 8 corresponding to the locking groove 7. The front end of the limiting inclined surface 8 is provided with a rounded transition.

[0044] Specifically, when locking the turntable 4, the locking element 6 needs to cooperate with the locking groove 7. Multiple locking grooves 7 are provided on the outer periphery of the turntable 4 corresponding to multiple locking elements 6. After the turntable 4 switches positions, the multiple locking elements 6 tighten towards the inside of the turntable 4 and insert into the corresponding locking groove 7, thereby restricting the position of the turntable 4 and preventing it from rotating. To avoid wear caused by frequent cooperation between the locking elements 6 and the locking groove 7, and to make it easier for the locking elements 6 to insert into the locking groove 7, the locking groove 7 is designed as a conical groove. The front end of the corresponding locking element 6 is designed as a limiting inclined surface 8. The cooperation between the limiting inclined surface 8 and the conical groove increases the service life of the locking element 6.

[0045] Furthermore, the base 1 is provided with the same number of guide grooves 9 as the locking member 6. The guide grooves 9 extend along the radial direction of the turntable 4. A connecting rod 10 is slidably installed in the guide groove 9. One end of the connecting rod 10 is fixedly connected to the locking member 6.

[0046] The locking drive assembly includes:

[0047] A drive disk 11 is rotatably mounted inside the base 1. The drive disk 11 is coaxially arranged with the turntable 4. An arc-shaped groove 12 is provided on the drive disk 11, which corresponds one-to-one with the guide groove 9. The arc-shaped groove 12 cooperates with the guide groove 9 to make the connecting rod 10 slide along the guide groove 9.

[0048] The second driving device 13 is used to drive the driving disk 11 to rotate.

[0049] Specifically, when the locking member 6 slides relative to the base 1, it is guided by the guide groove 9. The guide groove 9 is located on the top of the base 1 and corresponds one-to-one with the locking member 6. A connecting rod 10 is slidably installed in each guide groove 9, and the sliding direction is along the radial direction of the turntable 4. The connecting rod 10 is fixed to the locking member 6, and the locking member 6 is driven to slide along the guide groove 9 through the connecting rod 10.

[0050] The locking drive assembly consists of a drive disc 11 and a second drive device 13. The drive disc 11 is an annular disc located inside the base 1 and coaxially arranged with the turntable 4. An arc-shaped groove 12 is provided on the drive disc 11 corresponding to each guide groove 9. One end of the connecting rod 10, which is adjacent to the locking member 6, extends into the arc-shaped groove 12. When the locking member 6 needs to be moved, the drive disc 11 rotates. During the rotation of the drive disc 11, the arc-shaped groove 12 continuously compresses the connecting rod 10, thereby allowing the locking member 6 to move along the guide groove 9 under its guiding action. The rotation of the drive disc 11 is driven by the second drive device 13. Optionally, the second drive device 13 consists of a drive motor and a reducer.

[0051] Furthermore, the axial positioning assembly includes a plurality of pushing members 14, which are fixed to the side wall of the support arm 2. Each pushing member 14 is provided with a push rod 15 that is axially retractable along the turntable 4, and a friction plate 16 is installed at the free end of the push rod 15.

[0052] Specifically, in this embodiment, three axial positioning components are provided, respectively located on the other three sides of the support arm 2 where the hydraulic punch 3 is not installed. Each axial positioning component consists of a pushing member 14 and a friction plate 16. The pushing member 14 includes a push rod 15 that can extend axially along the turntable 4. The push rod 15 is retractable within the pushing member 14 under control. The friction plate 16 is mounted on the free end of the push rod 15. After the turntable 4 switches positions, the pushing member 14 pushes the push rod 15 out, causing the friction plate 16 to abut against the surface of the turntable 4. This prevents the turntable 4 from rotating due to friction between the friction plate 16 and the turntable 4, and also prevents axial wobbling of the turntable 4 during the stamping process through the contact of the friction plate 16 with the turntable 4. Optionally, the pushing member 14 can be a pneumatic cylinder or a hydraulic cylinder.

[0053] Furthermore, the clamping assembly includes:

[0054] A pair of clamping plates 17, wherein the pair of clamping plates 17 are U-shaped plates with openings facing each other, and the two sides of the clamping plates 17 are extended outward to increase the opening degree of the clamping plates 17;

[0055] The third driving device 18 is used to drive the pair of clamping plates 17 to move closer to or further away from each other.

[0056] Specifically, the clamping assembly consists of a pair of clamping plates 17 and a third driving device 18. The pair of clamping plates 17 are arranged opposite each other to clamp the workpiece. By arranging the clamping plates 17 in a U-shape with outward extension on both sides, the clamping plates 17 can adapt to workpieces of various shapes, improving the stability when clamping workpieces of different shapes. The third driving device 18 includes a pair of air cylinders or a pair of hydraulic cylinders, which are used to drive the pair of clamping plates 17 respectively.

[0057] Furthermore, the turntable 4 is also provided with a counterweight assembly, which adjusts the weight distribution on the turntable 4 according to the position and weight of the workpiece held by the clamping assembly.

[0058] Specifically, by setting a counterweight component on the turntable 4, the problem of uneven weight distribution on the turntable 4 after a workpiece is installed at a certain clamping station can be reduced, the centrifugal force generated by the workpiece when the turntable 4 rotates can be offset, and the turntable 4 can be made more stable when rotating.

[0059] Furthermore, the counterweight assembly includes:

[0060] An annular groove 19 is formed on the outer peripheral edge of the top surface of the turntable 4, and an annular guide rail 20 is provided in the annular groove 19.

[0061] Multiple counterweights 21 are slidably mounted on the annular guide rail 20.

[0062] Specifically, the annular groove 19 has a T-shaped cross-section, and the annular guide rail 20 is located inside the annular groove 19. The annular guide rail 20 also has a T-shaped cross-section and is fixed to the bottom surface of the annular groove 19. One side of the counterweight block 21 extends into the annular groove 19 and is slidably connected to the annular guide rail 20, with the sliding direction along the extension direction of the annular guide rail 20. By adjusting the position of the counterweight block 21 along the annular guide rail 20, the weight distribution on the turntable 4 can be ensured to be uniform. The weight distribution on the turntable 4 can be adjusted by a single counterweight block 21 or by multiple counterweight blocks 21 working together. The counterweight block 21 is made of a material with a high density; optionally, the counterweight block 21 is a tungsten block.

[0063] Furthermore, the counterweight 21 is provided with a locking pin 24, which passes through the counterweight 21 and is threadedly connected to the counterweight 21. The locking pin 24 restricts the movement of the counterweight 21 by abutting against the annular guide rail 20.

[0064] Specifically, after adjusting the position of the counterweight 21, it needs to be locked. Therefore, a locking pin 24 is provided on each counterweight 21. The locking pin 24 is a threaded rod that passes through the counterweight 21 and is threadedly connected to the counterweight 21. One end of the locking pin 24 extends into the annular groove 19, and the other end is provided with a handle 25 for easy rotation. After the position of the counterweight 21 is adjusted, the locking pin 24 is rotated so that the free end of the locking pin 24 abuts against the annular guide rail 20. The counterweight 21 is fixed by the friction between the locking pin 24 and the annular guide rail 20.

[0065] Furthermore, a hard alloy wear-resistant sheet is embedded on the limiting inclined surface 8.

[0066] Specifically, by embedding a hard alloy wear-resistant plate on the limiting inclined surface 8, the wear resistance of the locking part 6 can be improved, further reducing the wear of the locking part 6 caused by the long-term cooperation between the locking part 6 and the locking groove 7.

[0067] Furthermore, a first bearing 22 is provided between the turntable 4 and the support arm 2, and a second bearing 23 is provided between the rotation axis of the turntable 4 and the drive disk 11.

[0068] Specifically, to reduce the friction between the turntable 4 and the support arm 2 during relative rotation, a first bearing 22 is provided between the turntable 4 and the support arm 2. The inner ring of the first bearing 22 is fixed to the support arm 2, and the outer ring of the first bearing 22 is fixed to the inner side of the turntable 4. To reduce the friction between the rotation axis of the turntable 4 and the drive disk 11 during relative rotation, a second bearing 23 is provided between the rotation axis of the turntable 4 and the drive disk 11. The inner ring of the second bearing 23 is fixed to the rotation axis of the turntable 4, and the outer ring of the second bearing 23 is fixed to the inner side of the drive disk 11.

[0069] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A hydraulic locking rotary table positioning device for a CNC punch press, characterized in that, include: A base (1) is provided with a support arm (2) on its top surface and a hydraulic punch (3) is provided on the top of the support arm (2). Turntable (4), the turntable (4) is rotatably mounted on the base (1) and coaxially arranged with the support arm (2), the turntable (4) is provided with multiple workpiece clamping stations, and the workpiece clamping stations are provided with clamping components; the turntable (4) is driven to rotate by the first driving device (5); Multiple locking elements (6) are distributed on the outer periphery of the turntable (4) and can slide relative to the base (1); the multiple locking elements (6) are driven by a locking drive assembly to move synchronously along the radial direction of the turntable (4) to radially lock the turntable (4); An axial positioning component is mounted on the support arm (2) and is used to axially lock the turntable (4).

2. The hydraulic locking rotary table positioning device for a CNC punching machine according to claim 1, characterized in that, The outer periphery of the turntable (4) is provided with a locking groove (7) for the insertion of the locking member (6). The locking groove (7) is a conical groove. The locking member (6) is provided with a limiting slope (8) corresponding to the locking groove (7). The front end of the limiting slope (8) is provided with a rounded transition.

3. The hydraulic locking rotary table positioning device for a CNC punching machine according to claim 2, characterized in that, The base (1) is provided with the same number of guide grooves (9) as the locking member (6). The guide grooves (9) extend along the radial direction of the turntable (4). A connecting rod (10) is slidably installed in the guide groove (9). One end of the connecting rod (10) is fixedly connected to the locking member (6). The locking drive assembly includes: The drive disk (11) is rotatably installed inside the base (1). The drive disk (11) is coaxially arranged with the turntable (4). The drive disk (11) has an arc-shaped groove (12) that corresponds one-to-one with the guide groove (9). The arc-shaped groove (12) cooperates with the guide groove (9) to make the connecting rod (10) slide along the guide groove (9). The second drive device (13) is used to drive the drive disk (11) to rotate.

4. The hydraulic locking rotary table positioning device for a CNC punching machine according to claim 3, characterized in that, The axial positioning assembly includes multiple pushers (14), which are fixed to the side wall of the support arm (2). Each pusher (14) is provided with a push rod (15) that is axially retractable along the turntable (4), and a friction plate (16) is installed at the free end of the push rod (15).

5. The hydraulic locking rotary table positioning device for a CNC punching machine according to claim 4, characterized in that, The clamping assembly includes: A pair of clamping plates (17), the pair of clamping plates (17) are U-shaped plates with openings facing each other, the two sides of the clamping plates (17) are extended outward to increase the opening degree of the clamping plates (17); A third driving device (18) is used to drive the pair of clamping plates (17) to move closer to or further away from each other.

6. The hydraulic locking rotary table positioning device for a CNC punching machine according to claim 5, characterized in that, The turntable (4) is also provided with a counterweight assembly, which adjusts the weight distribution on the turntable (4) according to the position and weight of the workpiece held by the clamping assembly.

7. The hydraulic locking rotary table positioning device for a CNC punching machine according to claim 6, characterized in that, The counterweight assembly includes: An annular groove (19) is formed on the outer periphery of the top surface of the turntable (4), and an annular guide rail (20) is provided in the annular groove (19). Multiple counterweights (21) are slidably mounted on the annular guide rail (20).

8. The hydraulic locking rotary table positioning device for a CNC punching machine according to claim 7, characterized in that, The counterweight (21) is provided with a locking pin (24), which passes through the counterweight (21) and is threadedly connected to the counterweight (21). The locking pin (24) restricts the movement of the counterweight (21) by abutting against the annular guide rail (20).

9. The hydraulic locking rotary table positioning device for a CNC punching machine according to claim 8, characterized in that, Hard alloy wear-resistant plates are embedded on the limiting inclined surface (8).

10. The hydraulic locking rotary table positioning device for a CNC punching machine according to claim 9, characterized in that, A first bearing (22) is provided between the turntable (4) and the support arm (2), and a second bearing (23) is provided between the rotation axis of the turntable (4) and the drive disk (11).

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