CNC automatic material loading and taking device, CNC machining equipment and working method of CNC machining equipment

Abstract

The invention relates to a CNC automatic material loading and taking device, CNC machining equipment and a working method of the CNC automatic material loading and taking device. The device comprises a material taking mechanism, a clamping mechanism and a material storage mechanism. The material storage mechanism is used for storing workpieces, and a driving assembly of the material taking mechanism is used for driving a multi-station mechanical clamping jaw to move between the material disc and the clamping mechanism; the clamping mechanism comprises a double-layer workbench and a plurality of clamping assemblies, the multiple clamping assemblies are arranged on the double-layer workbench, and each clamping assembly comprises a fixed pressing plate, a downward pressing unit and a plurality of side pressing units; the downward pressing unit comprises a downward pressing plate and a downward pulling driving piece fixedly connected with the downward pressing plate. The side pressing unit comprises a side pressing plate and an upward pushing driving part; when a workpiece is clamped, the workpiece is clamped between the lower pressing plate and the horizontal plane of the fixed halfpace and between the side pressing plate and the vertical plane of the fixed halfpace. Automatic material loading and taking can be achieved, manual operation of operators is not needed, the production efficiency is improved, and potential safety hazards in the clamping and taking process are eliminated.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tools, and in particular to CNC automatic loading and unloading devices, CNC machining equipment, and their working methods. Background Technology

[0002] Computer Numerical Control machine tools (CNC) are widely used in the processing of mobile phone frames due to their high precision, high efficiency, and high degree of automation. However, in current technology, the clamping and unclamping operations of mobile phone frames still rely on manual operation, which faces many challenges in mass production environments. Specifically, the current mobile phone frame clamping process typically involves operators manually placing the workpiece onto the CNC fixture and securing it with a pneumatic screwdriver. During the unclamping stage, the operator needs to loosen the screws again with a pneumatic screwdriver and then remove the workpiece from the fixture. While this method meets production needs to some extent, it exposes the following main problems in mass production: First, manual clamping and unclamping operations are inefficient and cannot meet the demands of modern manufacturing for high production speed and high output. The high labor intensity for operators limits their work efficiency, making it difficult to achieve rapid and continuous production.

[0003] Secondly, clamping accuracy is difficult to guarantee. Manual operation is subject to certain errors, especially when the operator is fatigued or inattentive, which can significantly affect clamping accuracy, leading to unstable processing quality and difficulty in ensuring product consistency.

[0004] Furthermore, manual operation poses significant safety hazards. During clamping and unclamping processes, operators frequently need to use tools such as pneumatic screwdrivers, which can easily lead to injuries to the hands or other body parts. This safety risk is further increased, especially under tight production schedules. Summary of the Invention

[0005] Therefore, it is necessary to provide an automatic CNC loading and unloading device, CNC machining equipment, and its working method to address the problems of low CNC workpiece clamping efficiency and safety hazards.

[0006] In a first aspect, the present invention provides a CNC automatic loading and unloading device, including a material handling mechanism, a clamping mechanism and a material storage mechanism; The material storage mechanism includes a material platform and a material tray placed on the material platform, the material tray being used to store workpieces; The material handling mechanism includes a multi-station mechanical gripper and a drive assembly. The multi-station mechanical gripper is used to grip multiple workpieces on the material tray, and the drive assembly drives the multi-station mechanical gripper to move between the material tray and the clamping mechanism. The clamping mechanism includes a double-layer worktable and multiple clamping assemblies. The multiple clamping assemblies are respectively arranged on the double-layer worktable. Each clamping assembly includes a fixed pressure plate, a lower pressure unit, and multiple side pressure units. The lower pressure unit includes a lower pressure plate and a pull-down drive component fixedly connected to the lower pressure plate. The fixed pressure plate is located on the upper layer of the double-layer worktable, the lower pressure plate is located above the fixed pressure plate, and the pull-down drive component is located on the lower layer of the double-layer worktable. The side pressure unit includes a side pressure plate and an upward push drive component. The contact surface between the side pressure plate and the upward push drive component is an inclined surface. Multiple side pressure plates are respectively arranged around the fixed pressure plate, and the upward push drive component is located on the lower layer of the double-layer worktable. The fixed pressure plate has a ring of fixed ladders on its side. The lower pressure plate's lower pressure plane is opposite to the horizontal plane of the fixed ladders, and the side pressure plate's side pressure plane is opposite to the vertical plane of the fixed ladders. When the workpiece is clamped, the workpiece is clamped between the horizontal plane of the lower pressure plate and the fixed ladders, and between the vertical plane of the side pressure plate and the fixed ladders.

[0007] In some embodiments, the pull-down drive includes a hydraulic cylinder and a pull-down auxiliary plate. The hydraulic cylinder is disposed on the lower layer of the double-layer worktable. The piston rod end of the hydraulic cylinder passes through the upper plate of the double-layer worktable, the fixed pressure plate, and the lower pressure plate in sequence and is fixedly connected to the pull-down auxiliary plate. The pull-down auxiliary plate is fixedly connected to the lower pressure plate.

[0008] In some embodiments, a plurality of stabilizing columns are provided between the fixed pressure plate, the lower pressure plate and the pull-down auxiliary plate. One end of each stabilizing column is fixedly connected to the fixed pressure plate, and the other end of each stabilizing column passes through the lower pressure plate and the pull-down auxiliary plate in sequence.

[0009] In some embodiments, the side of the lower pressure plate is provided with several notches adapted to the multi-station mechanical gripper or the workpiece processing part, and the lower pressure plate is also provided with multiple slits extending from the side to the center, the length of the slits being less than half the length of the lower pressure plate or half the width of the lower pressure plate.

[0010] In some embodiments, the upward drive component includes a cylinder and an upward auxiliary block. The cylinder is disposed on the lower layer of the double-layer worktable, and the piston head of the cylinder is connected to the upward auxiliary block. The upward auxiliary block passes through the upper plate of the double-layer worktable and is connected to the side pressure plate slide rail. The side of the upward auxiliary block near the side pressure plate is provided with an inclined slide rail, and the side pressure plate near the upward auxiliary block is provided with an inclined slider. When the upward auxiliary block moves upward, the side pressure plate moves towards the fixed ladder platform.

[0011] In some embodiments, the side pressure plate is provided with a cushioning pad on the side near the fixed ladder platform.

[0012] In some embodiments, stabilizing blocks are provided on both sides of the side pressure plate, the stabilizing blocks are fixedly connected to the double-layer workbench, and the stabilizing blocks are slidably connected to the side pressure plate.

[0013] In some embodiments, the drive assembly includes an X-axis drive and a Z-axis drive, the multi-station mechanical gripper is fixedly connected to one side of the X-axis drive, and the other side of the X-axis drive is fixedly connected to the Z-axis drive. The X-axis drive and the Z-axis drive drive the multi-station mechanical gripper to move between the material tray and the clamping mechanism. The double-layer worktable is mounted on a dual-axis drive base and is fixedly connected to the dual-axis drive base.

[0014] Secondly, the present invention provides a CNC machining equipment, including a machining drill assembly and the aforementioned CNC automatic loading and unloading device.

[0015] Thirdly, the present invention provides a method for operating a CNC machining equipment, the method comprising: The drive component controlling the material handling mechanism drives the multi-station mechanical gripper of the material handling mechanism to clamp the workpiece on the material tray to the fixed ladder of the clamping mechanism; The lower pressure plate and multiple side pressure plates of the clamping mechanism are controlled to move toward the fixed ladder platform to clamp the workpiece to the fixed ladder platform; Control the machining drill to machine the workpiece; After the workpiece is processed, the lower pressure plate and multiple side pressure plates of the clamping mechanism are controlled to move away from the fixed ladder, and the drive assembly is controlled to drive the multi-station mechanical gripper to clamp the workpiece on the fixed ladder to the material tray, thus completing the workpiece processing.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The CNC automatic loading and unloading device of the present invention can automatically load and unload materials without the need for manual operation by operators, thereby improving production efficiency and eliminating safety hazards in the clamping and unloading process; 2. Through the cooperation of the material handling mechanism and the clamping mechanism, it can adaptively achieve the fixing, clamping, loading, and unloading of mobile phone frames of different sizes, without the need for manual adjustment by operators, thus meeting the needs of mass production of different product specifications. The material handling mechanism adopts multi-station mechanical grippers, which can clamp multiple workpieces onto the fixed ladder at one time.

[0017] 3. The clamping mechanism uses a hydraulic cylinder to power the lower pressure plate, which can more effectively fix the workpiece and prevent it from moving or vibrating during processing, thus improving processing accuracy and efficiency. At the same time, the lower pressure plate is equipped with multiple slits, which can adapt to uneven workpiece surfaces and deform accordingly to protect the workpiece.

[0018] 4. This CNC machining equipment has a simple working method and can achieve full automation without the need for manual operation, thereby improving the workpiece processing effect and eliminating safety hazards. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the CNC automatic loading and unloading device shown in an embodiment of the present invention; Figure 2 This is a schematic diagram of the material storage mechanism from an exploded perspective, as shown in an embodiment of the present invention. Figure 3 This is a schematic diagram of the material handling mechanism shown in an embodiment of the present invention; Figure 4 This is a schematic diagram of the clamping mechanism shown in an embodiment of the present invention; Figure 5 This is a schematic diagram of the clamping mechanism from an exploded perspective, as shown in an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of the fixed pressure plate shown in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the pull-down drive component from an exploded perspective, as shown in an embodiment of the present invention. Figure 8 This is a schematic diagram of the upward pushing drive component from an exploded perspective, as shown in an embodiment of the present invention. Figure 9 This is a schematic diagram of the material handling mechanism from an exploded view, as shown in an embodiment of the present invention. Figure 10 This is a schematic diagram of the material handling mechanism from an exploded view, as shown in an embodiment of the present invention. Figure 11 This is a schematic diagram of the structure of a CNC machining equipment shown in an embodiment of the present invention; Figure 12This is a schematic flowchart illustrating the working method of the CNC machining equipment according to an embodiment of the present invention. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly on" another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] See Figures 1 to 6 The present invention provides a CNC automatic loading and unloading device, which includes a material handling mechanism 1, a clamping mechanism 2, and a material storage mechanism 3. The material storage mechanism 3 includes a material platform 31 and a material tray 32 placed on the material platform, the material tray 32 being used to store the workpiece 4; The material handling mechanism 1 includes a multi-station mechanical gripper 11 and a drive assembly 12. The multi-station mechanical gripper 11 is used to grip multiple workpieces 4 on the material tray 32. The drive assembly 12 drives the multi-station mechanical gripper 11 to move between the material tray 32 and the clamping mechanism 2. The clamping mechanism 2 includes a double-layer worktable 21 and multiple clamping components 22. The multiple clamping components 22 are respectively arranged on the double-layer worktable 21. Each clamping component 22 includes a fixed pressure plate 221, a lower pressure unit, and multiple side pressure units. The lower pressure unit includes a lower pressure plate 222 and a pull-down drive component 223 fixedly connected to the lower pressure plate 222. The fixed pressure plate 221 is located on the upper layer of the double-layer worktable 21, the lower pressure plate 222 is located above the fixed pressure plate 221, and the pull-down drive component 223 is located on the lower layer of the double-layer worktable 21. The side pressure unit includes a side pressure plate 224 and an upward drive component 225. The contact surface between the side pressure plate 224 and the upward drive component 225 is an inclined surface. The multiple side pressure plates 224 are respectively arranged around the fixed pressure plate 221, and the upward drive component 225 is located on the lower layer of the double-layer worktable 21. The fixed pressure plate 221 has a ring of fixed ladders 2211 on its side. The downward pressing plane of the lower pressure plate 222 is opposite to the horizontal plane of the fixed ladders 2211, and the side pressing plane of the side pressure plate 224 is opposite to the vertical plane of the fixed ladders 2211. When the workpiece 4 is clamped, the workpiece 4 is clamped between the horizontal plane of the lower pressure plate 222 and the fixed ladders 2211, and between the vertical plane of the side pressure plate 224 and the fixed ladders 2211.

[0024] In this embodiment, the multi-station mechanical gripper 11 has multiple grippers, for example... Figure 3 The two grippers shown are movable and powered by a cylinder to open or close. The drive assembly 12 drives the multi-station mechanical gripper 11 to move up and down and / or horizontally, thereby moving the multi-station mechanical gripper 11 to the material tray to grip the workpiece 4, and then to the fixed platform 2211 of the clamping mechanism 2 to place the workpiece 4. The material tray 32 has multiple workpiece slots adapted to the workpiece 4, and each workpiece slot has several hollow openings adapted to the multi-station mechanical gripper 11. The workpiece slots ensure that the multi-station mechanical gripper 11 stably grips multiple workpieces 4 in the target posture, and the hollow openings facilitate the multi-station mechanical gripper 11 extending into the material tray 32 to grip the workpiece 4. Optionally, the platform surface has a hollow structure to further facilitate the operation of the mechanical gripper 11.

[0025] When the downward driving member 223 of the downward pressing unit provides downward force, it drives the downward pressing plate 222 to move downward, so as to clamp the workpiece 4 onto the fixed ladder 2211 from above. When the upward driving member 225 of the side pressing unit provides upward force, since the contact surface between the upward driving member 225 and the side pressing plate 224 is inclined, the upward driving member 225 and the side pressing plate 224 move relative to each other. Specifically, when the upward driving member 225 moves upward, the side pressing plate 224 moves closer to the fixed ladder 2211, so as to clamp the workpiece 4 onto the fixed ladder 2211 from the side. Since the workpiece 4 is a mobile phone frame, and its processing part is the outer side of the frame, after both the side pressing unit and the downward pressing unit clamp the workpiece mobile phone frame, the downward pressing unit continues to press the mobile phone frame, while the side pressing unit returns to its original position, so as to leave processing space for the processing drill to process the outer side of the mobile phone frame.

[0026] In this embodiment, the drive assembly 12 cooperates with the multi-station mechanical gripper 11 to clamp multiple workpieces onto the fixed ladder 2211 of the clamping mechanism 2 at one time, thereby realizing automatic material handling at multiple stations. The upward drive component 225 cooperates with the side pressure plate 224 to achieve side pressure on the workpiece 4, and the downward drive component 223 cooperates with the downward pressure plate 222 to achieve downward pressure on the workpiece 4, thereby achieving automatic locking of multiple workpieces 4. There is no need for operators to manually place the workpieces, nor is there a need to use a pneumatic screwdriver to lock the workpieces, which greatly improves production efficiency and reduces production safety risks.

[0027] In some embodiments, such as Figure 7 As shown, the pull-down drive component 223 includes a hydraulic cylinder 2231 and a pull-down auxiliary plate 2232. The hydraulic cylinder 2231 is disposed on the lower layer of the double-layer workbench 21. The piston rod end of the hydraulic cylinder 2231 passes through the upper plate of the double-layer workbench 21, the fixed pressure plate 221 and the lower pressure plate 22 in sequence and is fixedly connected to the pull-down auxiliary plate 2232. The pull-down auxiliary plate 2232 is fixedly connected to the lower pressure plate 222.

[0028] In this embodiment, the hydraulic cylinder 2231 can be an oil cylinder. When the workpiece is not clamped, the piston rod of the hydraulic cylinder 2231 extends to separate the fixed pressure plate 221 from the lower pressure plate 222, thereby facilitating the placement of the workpiece 4. When the workpiece 4 is placed on the fixed platform 2211, the piston rod of the hydraulic cylinder 2231 is pulled down. The pull-down auxiliary plate 2232 is fixedly connected to the piston rod, so the pull-down auxiliary plate 2232 moves downward accordingly. The pull-down auxiliary plate 2232 is fixedly connected to the lower pressure plate 222, which further drives the lower pressure plate 222 to move closer to the fixed pressure plate 221, thereby clamping the workpiece 4.

[0029] Optionally, such as Figure 7The fixed pressure plate 221, the lower pressure plate 222, and the pull-down auxiliary plate 2232 are provided with a plurality of stabilizing posts 226. One end of each stabilizing post 226 is fixedly connected to the fixed pressure plate 224, and the other end of each stabilizing post 226 passes through the lower pressure plate 224 and the pull-down auxiliary plate 2232 in sequence. In this embodiment, the stabilizing posts 226 are provided to stabilize the horizontal positional relationship between the fixed pressure plate 221, the lower pressure plate 222, and the pull-down auxiliary plate 2232, preventing horizontal misalignment of the fixed pressure plate 221, the lower pressure plate 222, and the pull-down auxiliary plate 2232, which would cause the pressing plane to shift, thereby ensuring the pressing effect on the workpiece 4.

[0030] Optionally, such as Figure 7 As shown, the lower pressure plate 222 has several notches 2221 on its side that are adapted to the processing parts of the multi-station mechanical gripper 11 or the workpiece 5. The lower pressure plate 222 also has multiple slits 2222 extending from the side to the center. The length of each slit 2222 is less than half the length or half the width of the lower pressure plate. In this embodiment, the notches 2221 are provided to facilitate the multi-station mechanical gripper 11 in placing the workpiece 4 on the fixed ladder 2211, and to facilitate the machining drill in machining the upper side or part of the inner side of the workpiece 4. By providing multiple slits 2222, the lower pressure plate 222 can adaptively deform to accommodate workpieces with uneven surfaces, avoiding damage to the workpiece 4 and thus protecting the integrity of the workpiece 4 during locking processing.

[0031] In some embodiments, such as Figure 8 As shown, the upward drive component 225 includes a cylinder 2251 and an upward auxiliary block 2252. The cylinder 2251 is disposed on the lower layer of the double-layer workbench 21. The piston head of the cylinder 2251 is connected to the upward auxiliary block 2252. The upward auxiliary block 2252 passes through the upper plate of the double-layer workbench 21 and is connected to the slide rail of the side pressure plate 224. The side of the upward auxiliary block 2252 near the side pressure plate 224 is provided with an inclined slide rail 22521. The side of the side pressure plate 224 near the upward auxiliary block 2252 is provided with an inclined slider 2241. When the upward auxiliary block 2252 moves upward, the side pressure plate 224 moves towards the fixed ladder 2211.

[0032] In this embodiment, the cylinders 2251 of the multiple side-pressing units are connected in series electrically to achieve synchronous side-pressing and ensure the side-pressing effect. When it is necessary to side-press the workpiece 4, the piston head of the cylinder pushes out, driving the upward push auxiliary block 2252 to move upward. The inclined slide rail 22521 of the upward push auxiliary block 2252 cooperates with the inclined slider 2241 of the side-pressing plate 224, driving the side-pressing plate 224 to move towards the side of the fixed ladder 2211, thereby achieving side-pressing.

[0033] Optionally, such as Figure 8 As shown, a buffer pad 2242 is provided on the side of the side pressure plate 224 near the fixed ladder platform 2211. By setting the buffer pad 2242, excessive pressure is prevented from causing deformation of the workpiece 4, thereby protecting the workpiece 4.

[0034] Optionally, such as Figure 8 As shown, stabilizing blocks 227 are provided on both sides of the side pressure plate 224. The stabilizing blocks 227 are fixedly connected to the double-layer worktable 21, and the stabilizing blocks 227 are slidably connected to the side pressure plate 224. By setting the stabilizing blocks 227 to slide with the side pressure plate 224, the movement stability of the side pressure plate 224 is improved, thereby ensuring the side pressure effect.

[0035] In some embodiments, such as Figure 9 and Figure 10 As shown, the drive assembly 12 includes an X-axis drive 121 and a Z-axis drive 122. The multi-station mechanical gripper 11 is fixedly connected to one side of the X-axis drive 121, and the other side of the X-axis drive 121 is fixedly connected to the Z-axis drive 122. The X-axis drive 121 and the Z-axis drive 122 drive the multi-station mechanical gripper 11 to move between the material tray 32 and the clamping mechanism 2.

[0036] In this embodiment, the X-axis drive 121 realizes the movement of the multi-station mechanical gripper 11 in the X-axis direction (horizontal direction), and the Z-axis drive 122 realizes the movement of the multi-station mechanical gripper 11 in the Z-axis direction (vertical direction), thereby realizing the movement of the workpiece 4 between the clamping mechanism 2 and the material tray 32.

[0037] Optionally, such as Figure 11 As shown, the double-layer worktable 21 is mounted on the dual-axis drive base 5 and is fixedly connected to the dual-axis drive base 5. The dual-axis drive base 5 is a dual-axis drive base based on X-axis drive and Y-axis drive, which facilitates the adjustment of the position of the clamping mechanism 2 and the material storage mechanism 3 relative to the material picking mechanism 1, thereby facilitating the loading and unloading of materials by the material picking mechanism 1, and adjusting the processing position of the workpiece 4 during machining and drilling.

[0038] See Figure 11 This invention provides a CNC machining equipment, including a machining drill assembly A and the aforementioned CNC automatic loading and unloading device B. In this embodiment, the machining drill assembly A is used to machine the workpiece 4 after the CNC automatic loading and unloading device B clamps the workpiece 4.

[0039] See Figure 12 The present invention provides a method for operating a CNC machining equipment, comprising: Step S101: Control the drive component of the material picking mechanism to drive the multi-station mechanical gripper of the material picking mechanism to clamp the workpiece on the material tray to the fixed ladder of the clamping mechanism. Step S102: Control the lower pressure plate and multiple side pressure plates of the clamping mechanism to move towards the fixed ladder platform to clamp the workpiece to the fixed ladder platform. Step S103: Control the machining drill to machine the workpiece; Step S104: After the workpiece is processed, control the lower pressure plate and multiple side pressure plates of the clamping mechanism to move away from the fixed ladder, and control the drive assembly to drive the multi-station mechanical gripper to clamp the workpiece on the fixed ladder to the material tray, thus completing the workpiece processing.

[0040] In this embodiment, the drive assembly 12 cooperates with the multi-station mechanical gripper 11 to clamp multiple workpieces onto the fixed ladder 2211 of the clamping mechanism 2 at one time, thereby realizing automatic material handling at multiple stations. The upward drive component 225 cooperates with the side pressure plate 224 to achieve side pressure on the workpiece 4, and the downward drive component 223 cooperates with the downward pressure plate 222 to achieve downward pressure on the workpiece 4, thereby realizing automatic locking of multiple workpieces 4. There is no need for operators to manually place workpieces, nor is there a need to use a pneumatic screwdriver to lock the workpieces, which greatly improves production efficiency and reduces production safety risks.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A CNC automatic loading and unloading device, characterized in that, Includes a material handling mechanism, a clamping mechanism, and a storage mechanism; The material storage mechanism includes a material platform and a material tray placed on the material platform, the material tray being used to store workpieces; The material handling mechanism includes a multi-station mechanical gripper and a drive assembly. The multi-station mechanical gripper is used to grip multiple workpieces on the material tray, and the drive assembly drives the multi-station mechanical gripper to move between the material tray and the clamping mechanism. The clamping mechanism includes a double-layer worktable and multiple clamping assemblies. The multiple clamping assemblies are respectively arranged on the double-layer worktable. Each clamping assembly includes a fixed pressure plate, a lower pressure unit, and multiple side pressure units. The lower pressure unit includes a lower pressure plate and a pull-down drive component fixedly connected to the lower pressure plate. The fixed pressure plate is located on the upper layer of the double-layer worktable, the lower pressure plate is located above the fixed pressure plate, and the pull-down drive component is located on the lower layer of the double-layer worktable. The side pressure unit includes a side pressure plate and an upward push drive component. The contact surface between the side pressure plate and the upward push drive component is an inclined surface. Multiple side pressure plates are respectively arranged around the fixed pressure plate, and the upward push drive component is located on the lower layer of the double-layer worktable. The fixed pressure plate has a ring of fixed ladders on its side. The lower pressure plate's lower pressure plane is opposite to the horizontal plane of the fixed ladders, and the side pressure plate's side pressure plane is opposite to the vertical plane of the fixed ladders. When the workpiece is clamped, the workpiece is clamped between the horizontal plane of the lower pressure plate and the fixed ladders, and between the vertical plane of the side pressure plate and the fixed ladders.

2. The CNC automatic loading and unloading device according to claim 1, characterized in that, The pull-down drive component includes a hydraulic cylinder and a pull-down auxiliary plate. The hydraulic cylinder is located on the lower layer of the double-layer worktable. The piston rod of the hydraulic cylinder passes through the upper plate of the double-layer worktable, the fixed pressure plate, and the lower pressure plate in sequence, and is then fixedly connected to the pull-down auxiliary plate. The pull-down auxiliary plate is fixedly connected to the lower pressure plate.

3. The CNC automatic loading and unloading device according to claim 2, characterized in that, A plurality of stabilizing columns are provided between the fixed pressure plate, the lower pressure plate and the pull-down auxiliary plate. One end of each stabilizing column is fixedly connected to the fixed pressure plate, and the other end of each stabilizing column passes through the lower pressure plate and the pull-down auxiliary plate in sequence.

4. The CNC automatic loading and unloading device according to claim 1, characterized in that, The lower pressure plate has several notches on its side that are adapted to the multi-station mechanical gripper or the workpiece processing part. The lower pressure plate also has multiple slits extending from the side to the center. The length of the slits is less than half the length of the lower pressure plate or half the width of the lower pressure plate.

5. The CNC automatic loading and unloading device according to claim 1, characterized in that, The upward driving component includes a cylinder and an upward auxiliary block. The cylinder is located on the lower layer of the double-layer worktable. The piston head of the cylinder is connected to the upward auxiliary block. The upward auxiliary block passes through the upper plate of the double-layer worktable and is connected to the side pressure plate slide rail. The side of the upward auxiliary block near the side pressure plate is provided with an inclined slide rail, and the side pressure plate near the upward auxiliary block is provided with an inclined slider. When the upward auxiliary block moves upward, the side pressure plate moves towards the fixed ladder platform.

6. The CNC automatic loading and unloading device according to claim 5, characterized in that, The side pressure plate is provided with a buffer pad on the side near the fixed ladder platform.

7. The CNC automatic loading and unloading device according to claim 5, characterized in that, Stabilizing blocks are provided on both sides of the side pressure plate. The stabilizing blocks are fixedly connected to the double-layer workbench and slidably connected to the side pressure plate.

8. The CNC automatic loading and unloading device according to claim 1, characterized in that, The drive assembly includes an X-axis drive and a Z-axis drive. The multi-station mechanical gripper is fixedly connected to one side of the X-axis drive, and the other side of the X-axis drive is fixedly connected to the Z-axis drive. The X-axis drive and the Z-axis drive drive the multi-station mechanical gripper to move between the material tray and the clamping mechanism. The double-layer worktable is mounted on a dual-axis drive base and is fixedly connected to the dual-axis drive base.

9. A CNC machining equipment, characterized in that, It includes a machining drill assembly and a CNC automatic loading and unloading device as described in any one of claims 1 to 8.

10. A method of operating the CNC machining equipment as described in claim 9, characterized in that, The working method includes: The drive component controlling the material handling mechanism drives the multi-station mechanical gripper of the material handling mechanism to clamp the workpiece on the material tray to the fixed ladder of the clamping mechanism; The lower pressure plate and multiple side pressure plates of the clamping mechanism are controlled to move toward the fixed ladder platform to clamp the workpiece to the fixed ladder platform; Control the machining drill to machine the workpiece; After the workpiece is processed, the lower pressure plate and multiple side pressure plates of the clamping mechanism are controlled to move away from the fixed ladder, and the drive assembly is controlled to drive the multi-station mechanical gripper to clamp the workpiece on the fixed ladder to the material tray, thus completing the workpiece processing.

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