CNC automatic material loading and taking device and CNC machining equipment

Abstract

The utility model relates to a CNC automatic material loading and taking device and CNC machining equipment. The CNC automatic material loading and taking 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. The automatic material loading and taking device can automatically load and take materials, manual operation of operators is not needed, production efficiency is improved, and potential safety hazards in the clamping and taking process are eliminated.

Description

Technical Field

[0001] The utility model relates to the field of CNC machine tools, in particular to a CNC automatic loading and unloading device and CNC processing equipment. Background Art

[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 the existing technology, the clamping and unclamping operations of mobile phone frames still rely on manual operation, which faces many challenges in a mass production environment. Specifically, the current mobile phone frame clamping process usually involves the operator manually placing the workpiece on the CNC fixture and fixing it with a pneumatic screwdriver. During the material removal stage, the operator needs to use the pneumatic screwdriver to loosen the screws again and then remove the workpiece from the fixture. Although this operation method meets production needs to a certain extent, it exposes the following major problems in mass production:

[0003] First, manual clamping and unclamping operations are inefficient and cannot meet the demands of modern manufacturing for high production speeds and high output. Operators face high labor intensity, limiting their efficiency and making it difficult to achieve rapid, continuous production.

[0004] Secondly, clamping accuracy is difficult to fully guarantee. Manual operation is subject to certain errors, especially when the operator is tired or distracted. Clamping accuracy will be significantly affected, resulting in unstable processing quality and difficulty in ensuring product consistency.

[0005] Furthermore, manual operation presents significant safety risks. During the clamping and unclamping process, operators frequently use tools such as pneumatic screwdrivers, which can easily lead to injuries to the hands or other parts of the body. This is especially true under tight production schedules, further increasing operator safety risks. Utility Model Content

[0006] Based on this, it is necessary to provide a CNC automatic loading and unloading device and CNC processing equipment to address the problems of low clamping efficiency and safety hazards of CNC workpieces.

[0007] In a first aspect, the utility model provides a CNC automatic loading and unloading device, comprising a material unloading mechanism, a clamping mechanism and a material storage mechanism;

[0008] The material storage mechanism includes a material table and a material tray placed on the material table, and the material tray is used to store workpieces;

[0009] The material picking mechanism includes a multi-station mechanical clamp and a drive assembly, wherein the multi-station mechanical clamp is used to clamp multiple workpieces on the material tray, and the drive assembly drives the multi-station mechanical clamp to move between the material tray and the clamping mechanism;

[0010] The camming mechanism comprises a double-layer workbench and a plurality of clamping assemblies, wherein the plurality of clamping assemblies are respectively arranged on the double-layer workbench, the clamping assembly comprises a fixed pressure plate, a lower pressure unit and a plurality of side pressure units; the lower pressure unit comprises a lower pressure plate and a pull-down driving member fixedly connected to the lower pressure plate, the fixed pressure plate is arranged on the upper layer of the double-layer workbench, the lower pressure plate is arranged above the fixed pressure plate, and the pull-down driving member is arranged on the lower layer of the double-layer workbench; the side pressure unit comprises a side pressure plate and an upward pushing driving member, the contact surface between the side pressure plate and the upward pushing driving member is an inclined surface, and the plurality of side pressure plates are respectively arranged around the fixed pressure plate, and the upward pushing driving member is arranged on the lower layer of the double-layer workbench;

[0011] A circle of fixed steps is provided on the side of the fixed pressure plate, the lower pressure plane of the lower pressure plate is opposite to the horizontal plane of the fixed step, and the side pressure plane of the side pressure plate is opposite to the vertical plane of the fixed step; when the workpiece is clamped, the workpiece is clamped between the lower pressure plate and the horizontal plane of the fixed step, and is clamped between the side pressure plate and the vertical plane of the fixed step.

[0012] In some embodiments, the pull-down drive component includes a hydraulic cylinder and a pull-down auxiliary plate. The hydraulic cylinder is arranged on the lower layer of the double-layer workbench. The end of the piston rod of the hydraulic cylinder passes through the upper plate of the double-layer workbench, 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.

[0013] 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 the stabilizing column is fixedly connected to the fixed pressure plate, and the other end of the stabilizing column passes through the lower pressure plate and the pull-down auxiliary plate in sequence.

[0014] In some of the embodiments, the side of the lower pressure plate is provided with a plurality of notches adapted to the multi-station mechanical clamp or the workpiece processing part, and the lower pressure plate is also provided with a plurality of cracks extending from the side to the center, and the length of the cracks is less than half the length of the lower pressure plate or half the width of the lower pressure plate.

[0015] In some embodiments, the upward push drive member includes a cylinder and an upward push auxiliary block, the cylinder is arranged on the lower layer of the double-layer workbench, the piston head of the cylinder is connected to the upward push auxiliary block, and the upward push auxiliary block passes through the upper plate of the double-layer workbench and is connected to the side pressure plate slide rail; the upward push auxiliary block is provided with an inclined slide rail on the side close to the side pressure plate, and the side pressure plate is provided with an inclined slider on the side close to the upward push auxiliary block, and when the upward push auxiliary block moves upward, the side pressure plate moves toward the direction close to the fixed ladder platform.

[0016] In some embodiments, a buffer pad is provided on a side of the side pressure plate close to the fixed platform.

[0017] 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.

[0018] In some embodiments, the drive assembly includes an X-axis drive member and a Z-axis drive member, the multi-station mechanical clamp is fixedly connected to one side of the X-axis drive member, and the other side of the X-axis drive member is fixedly connected to the Z-axis drive member, and the X-axis drive member and the Z-axis drive member drive the multi-station mechanical clamp to move between the material tray and the clamping mechanism;

[0019] The double-layer workbench is arranged on a double-axis driving base and is fixedly connected to the double-axis driving base.

[0020] In a second aspect, the utility model provides a CNC processing equipment, including a processing drill assembly and the above-mentioned CNC automatic loading and unloading device.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] 1. The CNC automatic loading and unloading device of this utility model 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 unclamping process;

[0023] 2. The retrieving mechanism works in conjunction with the clamping mechanism to adaptively secure, clamp, load, and retrieve mobile phone frames of varying sizes, eliminating the need for manual adjustments by the operator and enabling mass production of diverse product specifications. The retrieving mechanism utilizes a multi-station mechanical gripper capable of simultaneously gripping multiple workpieces onto the fixed platform.

[0024] 3. The clamping mechanism uses a hydraulic cylinder to power the lower platen, which can more effectively secure the workpiece, prevent it from moving or vibrating during processing, and improve processing accuracy and efficiency. At the same time, the lower platen is equipped with multiple cracks, which can adaptively deform when clamping uneven workpieces to protect the workpiece.

[0025] 4. The working method of this CNC processing equipment is simple and can achieve full automation, without the need for manual operation by operators, thus improving the workpiece processing effect and eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a CNC automatic loading and unloading device according to an embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of an exploded perspective of a material storage mechanism according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of a material taking mechanism according to an embodiment of the present utility model;

[0029] Figure 4 This is a schematic structural diagram of a clamping mechanism according to an embodiment of the present utility model;

[0030] Figure 5 This is a structural schematic diagram of an exploded perspective of a clamping mechanism according to an embodiment of the present invention;

[0031] Figure 6 This is a structural diagram of a fixed pressure plate according to an embodiment of the present invention;

[0032] Figure 7 This is a structural schematic diagram of an exploded perspective of a pull-down driving member according to an embodiment of the present invention;

[0033] Figure 8 This is a structural schematic diagram of an exploded perspective of an upward push driving member according to an embodiment of the present invention;

[0034] Figure 9 This is a structural schematic diagram of an exploded perspective of a material taking mechanism according to an embodiment of the present invention;

[0035] Figure 10 This is a structural schematic diagram of an exploded perspective of a material taking mechanism according to an embodiment of the present invention;

[0036] Figure 11 This is a schematic structural diagram of a CNC processing device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only."

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] See also Figures 1 to 6 The embodiment of the present utility model shows a CNC automatic loading and unloading device, which includes a material-retrieving mechanism 1, a clamping mechanism 2 and a material storage mechanism 3;

[0041] The material storage mechanism 3 includes a material table 31 and a material tray 32 placed on the material table, and the material tray 32 is used to store the workpiece 4;

[0042] The material picking 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.

[0043] The clamping mechanism 2 includes a double-layer workbench 21 and a plurality of clamping assemblies 22, and the plurality of clamping assemblies 22 are respectively arranged on the double-layer workbench 21, and the clamping assembly 22 includes a fixed pressure plate 221, a lower pressing unit and a plurality of side pressing units; the lower pressing unit includes a lower pressing plate 222 and a pull-down driving member 223 fixedly connected to the lower pressing plate 222, the fixed pressure plate 221 is arranged on the upper layer of the double-layer workbench 21, the lower pressing plate 222 is arranged above the fixed pressure plate 221, and the pull-down driving member 223 is arranged on the lower layer of the double-layer workbench 21; the side pressing unit includes a side pressure plate 224 and an upward pushing driving member 225, the contact surface of the side pressure plate 224 and the upward pushing driving member 225 is an inclined surface, and the plurality of side pressure plates 224 are respectively arranged around the fixed pressure plate 221, and the upward pushing driving member 225 is arranged on the lower layer of the double-layer workbench 21;

[0044] A circle of fixed steps 2211 is provided on the side of the fixed pressure plate 221, the lower pressure plane of the lower pressure plate 222 is opposite to the horizontal plane of the fixed step 2211, and the side pressure plane of the side pressure plate 224 is opposite to the vertical plane of the fixed step 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 step 2211, and is clamped between the vertical plane of the side pressure plate 224 and the fixed step 2211.

[0045] In this embodiment, the multi-station mechanical gripper 11 has multiple grippers, such as Figure 3 The two clamps shown are movable and powered by a cylinder to loosen or clamp. The drive assembly 12 drives the multi-station mechanical clamp 11 to move up and down and / or horizontally, thereby driving the multi-station mechanical clamp 11 to move to the material tray to clamp the workpiece 4, and then move to the fixed ladder 2211 of the clamping mechanism 2 to place the workpiece 4. Among them, the material tray 32 is provided with a plurality of workpiece slots adapted to the workpiece 4, and the workpiece slots are provided with a plurality of hollow openings adapted to the multi-station mechanical clamp 11. The provision of the workpiece slots can ensure that the multi-station mechanical clamp 11 can stably clamp multiple workpieces 4 in the target posture, and the hollow openings can facilitate the multi-station mechanical clamp 11 to extend into the material tray 32 to clamp the workpiece 4. Optionally, the table top of the material table is a hollow structure to further facilitate the operation of the mechanical clamp 11.

[0046] When the pull-down driving member 223 of the lower pressing unit provides a downward pulling force, the lower pressing plate 222 is driven to move downward, thereby clamping the workpiece 4 on the fixed step 2211 from above the fixed step 2211. When the push-up driving member 225 of the side pressing unit provides an upward thrust, since the contact surface between the push-up driving member 225 and the side pressing plate 224 is an inclined surface, the push-up driving member 225 and the side pressing plate 224 move relative to each other. Specifically, the push-up driving member 225 moves upward, and the side pressing plate 224 moves in a direction close to the fixed step 2211, thereby clamping the workpiece 4 on the fixed step 2211 from the side of the fixed step 2211. Since the workpiece 4 is a mobile phone frame, the processing part thereof is the outer side surface of the frame. Therefore, after the side pressing unit and the lower pressing unit have clamped the mobile phone frame, the lower pressing unit continues to press the mobile phone frame, while the side pressing unit is restored to its original position, leaving processing space for the processing drill to process the outer side surface of the mobile phone frame.

[0047] In this embodiment, the driving component 12 cooperates with the multi-station mechanical clamp 11 to clamp multiple workpieces to the fixed ladder 2211 of the clamping mechanism 2 at one time, so as to realize multi-station automatic material picking; the upward driving member 225 cooperates with the side pressure plate 224 to realize side pressure on the workpiece 4, and the downward driving member 223 cooperates with the lower pressure plate 222 to realize downward pressure on the workpiece 4, so as to realize automatic locking of multiple workpieces 4, without the need for the operator to manually place the workpiece or use a pneumatic screwdriver to lock the workpiece, thereby greatly improving production efficiency and reducing production safety risks.

[0048] In some embodiments, as Figure 7 As shown, the pull-down driving member 223 includes a hydraulic cylinder 2231 and a pull-down auxiliary plate 2232. The hydraulic cylinder 2231 is arranged on the lower layer of the double-layer workbench 21. The end of the piston rod 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.

[0049] In this embodiment, the hydraulic cylinder 2231 may be an oil cylinder. When the workpiece is not clamped, the piston rod of the hydraulic cylinder 2231 is pushed out to separate the fixed platen 221 from the lower platen 222, thereby facilitating the placement of the workpiece 4. When the workpiece 4 is placed on the fixed step 2211, the piston rod of the hydraulic cylinder 2231 is pulled downward, and the pull-down auxiliary plate 2232 is fixedly connected to the piston rod. As a result, the pull-down auxiliary plate 2232 moves downward accordingly. The pull-down auxiliary plate 2232 is fixedly connected to the lower platen 222, further driving the lower platen 222 to move closer to the fixed platen 221, thereby clamping the workpiece 4.

[0050] Alternatively, as Figure 7A plurality of stabilizing columns 226 are provided between the fixed platen 221, the lower platen 222, and the pull-down auxiliary plate 2232. One end of the stabilizing column 226 is fixedly connected to the fixed platen 224, and the other end of the stabilizing column 226 sequentially passes through the lower platen 22 and the pull-down auxiliary plate 2232. In this embodiment, the stabilizing columns 226 are provided to stabilize the horizontal positional relationship between the fixed platen 221, the lower platen 222, and the pull-down auxiliary plate 2232, thereby preventing the fixed platen 221, the lower platen 222, and the pull-down auxiliary plate 2232 from being misaligned in the horizontal direction and causing the pressing plane to shift, thereby ensuring the pressing effect on the workpiece 4.

[0051] Alternatively, as Figure 7 As shown, the side of the lower pressing plate 222 is provided with a plurality of notches 2221 adapted to the processing parts of the multi-station mechanical clamp 11 or the workpiece 5. The lower pressing plate 222 is also provided with a plurality of cracks 2222 extending from the side toward the center, and the length of the cracks 2222 is less than half the length of the lower pressing plate or half the width of the lower pressing plate. In this embodiment, the notches 2221 are provided to facilitate the multi-station mechanical clamp 11 to place the workpiece 4 on the fixed step 2211, and to facilitate the processing drill to process the upper side or part of the inner side of the workpiece 4. By providing multiple cracks 2222, the lower pressing plate 222 can undergo adaptive deformation for workpieces 4 with uneven surfaces, avoiding crushing the workpiece 4, thereby protecting the integrity of the workpiece 4 during the locking process.

[0052] In some embodiments, as Figure 8 As shown, the upward pushing drive member 225 includes a cylinder 2251 and an upward pushing auxiliary block 2252, the cylinder 2251 is arranged on the lower layer of the double-layer workbench 21, the piston head of the cylinder 2251 is connected to the upward pushing auxiliary block 2252, and the upward pushing 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 upward pushing auxiliary block 2252 is provided with an inclined slide rail 22521 on the side close to the side pressure plate 224, and the side pressure plate 224 is provided with an inclined slider 2241 on the side close to the upward pushing auxiliary block 2252. When the upward pushing auxiliary block 2252 moves upward, the side pressure plate 224 moves toward the direction close to the fixed ladder platform 2211.

[0053] In this embodiment, the cylinders 2251 of the multiple lateral pressure units are electrically connected in series to achieve synchronized lateral pressure and ensure effective lateral pressure. When lateral pressure is required on the workpiece 4, the piston heads of the cylinders push out, driving the upward push-up auxiliary block 2252 to move upward. The inclined slide rails 22521 of the upward push-up auxiliary block 2252 cooperate with the inclined slider 2241 of the lateral pressure plate 224, driving the lateral pressure plate 224 toward the side of the fixed step 2211, thereby achieving lateral pressure.

[0054] Alternatively, as Figure 8 As shown, a buffer pad 2242 is provided on one side of the side pressure plate 224 close to the fixed platform 2211. By providing the buffer pad 2242, deformation of the workpiece 4 due to excessive pressure is avoided, thereby protecting the workpiece 4.

[0055] Alternatively, 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 workbench 21 and are slidably connected to the side pressure plate 224. By providing the stabilizing blocks 227 and the side pressure plate 224 in a sliding connection, the movement stability of the side pressure plate 224 is improved, thereby ensuring the side pressure effect.

[0056] In some embodiments, 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 clamp 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, and the X-axis drive 121 and the Z-axis drive 122 drive the multi-station mechanical clamp 11 to move between the material tray 32 and the clamping mechanism 2.

[0057] In this embodiment, the X-axis drive 121 realizes the movement of the multi-station mechanical clamp 11 in the X-axis direction (horizontal direction), and the Z-axis drive 122 realizes the movement of the multi-station mechanical clamp 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.

[0058] Alternatively, as Figure 11 As shown, the double-layer workbench 21 is arranged on a 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, so as to facilitate adjustment of the position of the clamping mechanism 2 and the material storage mechanism 3 relative to the material retrieving mechanism 1, thereby facilitating the loading and unloading of materials by the material retrieving mechanism 1, and adjusting the processing position of the workpiece 4 during drilling.

[0059] See also Figure 11 The present invention provides a CNC processing device, comprising a processing drill assembly A and the above-mentioned CNC automatic loading and unloading device B. The processing drill assembly A of this embodiment is used to process the workpiece 4 after the CNC automatic loading and unloading device B clamps the workpiece 4.

[0060] The working method of the above-mentioned CNC processing equipment includes:

[0061] Step S101, controlling the driving assembly of the material taking mechanism to drive the multi-station mechanical gripper of the material taking mechanism to clamp the workpiece on the material tray to the fixed ladder of the clamping mechanism;

[0062] Step S102, controlling the lower pressing plate and the plurality of side pressing plates of the clamping mechanism to move toward the fixed step platform to clamp the workpiece to the fixed step platform;

[0063] Step S103, controlling the machining drill to machine the workpiece;

[0064] In step S104, after the workpiece processing is completed, the lower pressure plate and multiple side pressure plates of the clamping mechanism are controlled to move away from the fixed ladder platform, and the driving assembly is controlled to drive the multi-station mechanical clamp to clamp the workpiece on the fixed ladder platform to the material tray to complete the workpiece processing.

[0065] By cooperating with the driving component 12 and the multi-station mechanical clamp 11, multiple workpieces can be clamped to the fixed ladder 2211 of the clamping mechanism 2 at one time, so as to realize multi-station automatic material picking; by pushing up the driving member 225 and cooperating with the side pressure plate 224, the side pressure on the workpiece 4 is realized, and by pulling down the driving member 223 and cooperating with the lower pressure plate 222, the downward pressure on the workpiece 4 is realized, so as to realize automatic locking of multiple workpieces 4, without the need for the operator to manually place the workpiece or to use an air screw to lock the workpiece, which greatly improves production efficiency and reduces production safety risks.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0067] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A CNC automatic loading and unloading device, characterized in that: It includes a material taking mechanism, a clamping mechanism and a material storage mechanism; The material storage mechanism includes a material table and a material tray placed on the material table, and the material tray is used to store workpieces; The material picking mechanism includes a multi-station mechanical clamp and a drive assembly, wherein the multi-station mechanical clamp is used to clamp multiple workpieces on the material tray, and the drive assembly drives the multi-station mechanical clamp to move between the material tray and the clamping mechanism; The camming mechanism comprises a double-layer workbench and a plurality of clamping assemblies, wherein the plurality of clamping assemblies are respectively arranged on the double-layer workbench, the clamping assembly comprises a fixed pressure plate, a lower pressure unit and a plurality of side pressure units; the lower pressure unit comprises a lower pressure plate and a pull-down driving member fixedly connected to the lower pressure plate, the fixed pressure plate is arranged on the upper layer of the double-layer workbench, the lower pressure plate is arranged above the fixed pressure plate, and the pull-down driving member is arranged on the lower layer of the double-layer workbench; the side pressure unit comprises a side pressure plate and an upward pushing driving member, the contact surface between the side pressure plate and the upward pushing driving member is an inclined surface, and the plurality of side pressure plates are respectively arranged around the fixed pressure plate, and the upward pushing driving member is arranged on the lower layer of the double-layer workbench; A circle of fixed steps is provided on the side of the fixed pressure plate, the lower pressure plane of the lower pressure plate is opposite to the horizontal plane of the fixed step, and the side pressure plane of the side pressure plate is opposite to the vertical plane of the fixed step; when the workpiece is clamped, the workpiece is clamped between the lower pressure plate and the horizontal plane of the fixed step, and is clamped between the side pressure plate and the vertical plane of the fixed step.

2. The CNC automatic loading and unloading device according to claim 1, characterized in that: The pull-down driving component includes a hydraulic cylinder and a pull-down auxiliary plate. The hydraulic cylinder is arranged on the lower layer of the double-layer workbench. The end of the piston rod of the hydraulic cylinder passes through the upper plate of the double-layer workbench, 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.

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 pressing plate, the lower pressing plate and the pull-down auxiliary plate. One end of the stabilizing column is fixedly connected to the fixed pressing plate, and the other end of the stabilizing column passes through the lower pressing 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 side of the lower pressing plate is provided with a plurality of notches adapted to the multi-station mechanical clamp or the workpiece processing part. The lower pressing plate is also provided with a plurality of cracks extending from the side to the center, and the length of the cracks is less than half the length of the lower pressing plate or half the width of the lower pressing plate.

5. The CNC automatic loading and unloading device according to claim 1, characterized in that: The upward pushing drive component includes a cylinder and an upward pushing auxiliary block. The cylinder is arranged on the lower layer of the double-layer workbench. The piston head of the cylinder is connected to the upward pushing auxiliary block. The upward pushing auxiliary block passes through the upper plate of the double-layer workbench and is connected to the side pressure plate slide rail; the upward pushing auxiliary block is provided with an inclined slide rail on the side close to the side pressure plate, and the side pressure plate is provided with an inclined slider on the side close to the upward pushing auxiliary block. When the upward pushing auxiliary block moves upward, the side pressure plate moves toward the direction close to the fixed ladder platform.

6. The CNC automatic loading and unloading device according to claim 5, characterized in that: A buffer pad is provided on one side of the side pressure plate close to the fixed platform.

7. The CNC automatic loading and unloading device according to claim 5, characterized in that: Both sides of the side pressure plate are provided with stabilizing blocks, the stabilizing blocks are fixedly connected to the double-layer workbench, and the stabilizing blocks are 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 clamp 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 clamp to move between the material tray and the clamping mechanism.

9. The CNC automatic loading and unloading device according to claim 1, characterized in that: The device further comprises a dual-axis driving base, and the double-layer workbench is arranged on the dual-axis driving base and fixedly connected to the dual-axis driving base.

10. A CNC processing equipment, characterized in that, The invention comprises a processing drill assembly and a CNC automatic loading and unloading device as claimed in any one of claims 1 to 9.

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