CNC machining center

Abstract

The utility model relates to a CNC machining center and relates to the technical field of CNC production lines, the CNC machining center comprises a plurality of CNC machine tools, goods shelves are arranged on one sides of the CNC machine tools, and feeding and discharging mechanical arms are arranged between the goods shelves and the corresponding CNC machine tools; the AGV trolley is arranged among the CNC numerical control machine tools, and a carrying manipulator is arranged on the upper side of the AGV trolley; and the charging cabinet is used for charging the AGV. Through cooperation of the AGV trolley and the carrying mechanical arm, material connection between different CNC numerical control machine tools is achieved, and limitation of the space distance between the CNC numerical control machine tools corresponding to different machining links is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of CNC production lines, and in particular to a CNC numerical control machining center. Background Art

[0002] CNC machine tool is the abbreviation of computer numerical control machine tool. It is an automated machine tool controlled by a program. CNC machine tool can control the feed speed of the tool and the spindle speed through computer decoding, so that the machine tool can complete cutting, drilling and other operations on the workpiece. CNC machining has great advantages over manual machining, and the parts produced by it are accurate and repeatable.

[0003] Existing CNC machine tools usually have several of them, forming a CNC machining center, so that the raw materials can be produced after passing through all the CNC machine tools in sequence. CNC machining centers are mainly used for mass production of products, which can increase the production speed of products.

[0004] The existing CNC machine tools that make up the CNC machining center will be equipped with a loading and unloading mechanism on one side of themselves. The existing loading and unloading mechanism usually adopts a manipulator driven by a three-axis drive platform or a six-axis manipulator, so that the loading and unloading mechanism can take out the finished products from the CNC machine tool, and can also provide the CNC machine tool with raw materials to be processed. The setting of the loading and unloading mechanism can improve the automation level of the CNC machine tool, thereby improving the automation level of the entire CNC machining center.

[0005] The CNC machining centers corresponding to two adjacent machining links are set close to each other. Through the above-mentioned loading and unloading mechanism, the transportation of processed products between the two CNC machine tools can be realized, and then the full-automatic machining of the entire CNC machining center can be realized.

[0006] However, when one of the CNC machine tools stops due to an accident or other reasons, the processing link of the CNC machine tool stops, and the breakage of the middle link will cause the entire processing process to stop. Since there is a spatial distance requirement between the CNC machine tools corresponding to two adjacent processing links, even if other CNC machine tools are used to complete the processing link, since the CNC machine tool cannot be moved to the position of the stopped CNC machine tool, the entire processing process cannot continue to be fully automatically processed, which will lead to a reduction in the processing speed of the entire processing process. Utility Model Content

[0007] The present application provides a CNC machining center, the purpose of which is to achieve material connection between different CNC machine tools and reduce the limitation of spatial distance between different CNC machine tools under the premise of realizing fully automated machining of the CNC machining center.

[0008] The CNC machining center provided in this application adopts the following technical solution:

[0009] A CNC machining center includes a plurality of CNC machine tools, a shelf is provided on one side of the CNC machine tools, and a loading and unloading manipulator is provided between the shelf and the corresponding CNC machine tools;

[0010] It also includes an AGV trolley, which is arranged between the plurality of CNC machine tools, and a handling manipulator is arranged on the upper side of the AGV trolley;

[0011] It also includes a charging cabinet for charging the AGV vehicle.

[0012] By adopting the above technical solution, firstly, the coordinated arrangement of the loading and unloading manipulator, the shelf and the CNC machine tool enables the loading and unloading manipulator to transport materials between the shelf and the CNC machine tool.

[0013] By setting up an AGV cart and a handling robot on the AGV cart, the handling robot can grab materials on the shelf or place materials on the shelf, and the AGV cart can drive the handling robot to move between different CNC machine tools. The setting of the charging cabinet can charge the AGV cart in time.

[0014] Therefore, through the cooperation of the AGV trolley and the handling robot, the spatial distance limitation between the CNC machine tools corresponding to two adjacent processing links is reduced. Even if the CNC machine tool corresponding to a certain processing link in the middle is shut down, the work of the processing link can be realized through other prepared CNC machine tools, and the AGV trolley can realize the material connection between the prepared CNC machine tools and other CNC machine tools.

[0015] Optionally, a mobile base is provided at the lower side of the charging cabinet, a plurality of driving wheels are provided on the mobile base, and a driving motor for driving the driving wheels is provided on the mobile base;

[0016] The CNC machining center also includes a power supply ground rail with a power line embedded therein, and the plurality of CNC machine tools are distributed on both sides of the power supply ground rail in a width direction;

[0017] The mobile base is located on the upper side of the power supply rail in the vertical direction, and the moving direction of the mobile base is arranged along the length direction of the power supply rail;

[0018] A power connection piece is provided at the lower side of the charging cabinet, one end of the power connection piece is electrically connected to the charging cabinet, and the other end is electrically connected to the power supply ground rail, and the power connection piece is slidably connected to the power supply ground rail along the length direction of the power supply ground rail.

[0019] By adopting the above technical solution, firstly, through the coordinated arrangement of the driving wheels and the driving motor, the mobile base can move the charging cabinet.

[0020] Secondly, since a power supply ground rail is provided, and a power cord is embedded in the power supply ground rail, a power connection piece is provided between the power supply ground rail and the charging cabinet. While the power connection piece realizes the electrical connection between the power supply ground rail and the charging cabinet, the power connection piece can also be slidably connected to the power supply ground rail along the length direction of the power supply cabinet.

[0021] Therefore, the charging cabinet can move along the length direction of the power supply rail, so that when the distance between the charging cabinet and the AGV is too far, it can move to the vicinity of the AGV in time, thereby reducing the possibility of the AGV stopping.

[0022] Optionally, the charging cabinet includes a protective shell, which is arranged on the mobile base. A charging column is arranged in the protective shell, and the charging column is arranged in a vertical direction. A plurality of charging slots are opened around the charging column, and a wireless charger is embedded in the bottom wall of the charging slot. A plurality of entrance openings are opened around the protective shell, and the entrance openings are arranged one-to-one with the charging slots, and the entrance openings are connected to the corresponding charging slots.

[0023] By adopting the above technical solution, a charging slot is opened on the charging column, and a wireless charger is embedded in the inner bottom wall of the charging slot, so when the AGV moves to the corresponding charging slot, the wireless charger can charge the AGV.

[0024] The charging column is arranged inside the protective shell, so the protective shell can protect the charging column, and a plurality of entrances are opened on the outside of the protective shell, and the entrances are connected with the charging slot, so the opening of the entrances ensures that the AGV car can enter the charging slot.

[0025] Optionally, the charging column is rotatably connected to the protective shell, and the charging column is coaxially connected with a rotating driving member for driving the charging column to rotate.

[0026] By adopting the above technical solution, the charging column is rotatably connected to the protective shell and is provided with a rotating drive component. When the AGV enters the corresponding charging slot, the charging column can be rotated by the driving of the rotating drive component, so that the charging slot is closed by the protective shell, making it impossible for the AGV to get out of the charging slot, thereby protecting the charging AGV.

[0027] Optionally, a long sliding groove is provided on the upper side of the power supply ground rail, and the length direction of the long sliding groove is arranged along the length direction of the power supply ground rail;

[0028] A power connection long slot is provided at the bottom of the sliding long slot, and the length direction of the power connection long slot is arranged along the length direction of the power supply ground rail;

[0029] The width of the power connection slot is greater than the width of the sliding slot, and the power line is arranged on two opposite inner side walls of the power connection slot along its width direction.

[0030] By adopting the above technical solution, the matching arrangement of the sliding long groove and the power connection long groove makes it difficult for external objects to contact the power line, thereby improving the safety of the power supply ground rail.

[0031] Optionally, the power connection member includes a conductive sliding rod and a power connection rod, the conductive sliding rod is axially arranged in the vertical direction, the conductive sliding rod is plugged into the sliding long slot, and the conductive sliding rod is slidably connected to the inner side wall of the sliding long slot along the length direction of the power supply ground rail;

[0032] The connecting rod is axially arranged along the width direction of the long connecting slot, the conductive sliding rod is connected to the middle part of the connecting rod, the two ends of the connecting rod in the length direction respectively abut against the inner side walls corresponding to the width direction of the long connecting slot, and the connecting rod is slidably connected to the inner side wall of the long connecting slot along the length direction of the power supply ground rail.

[0033] By adopting the above technical solution, the conductive sliding rod and the connecting rod are arranged in cooperation, and the connecting rod can be used to connect the power line in the power supply ground rail, so that the power supply ground rail can supply power to the charging cabinet through the connecting rod and the conductive sliding rod. The conductive sliding rod is slidably connected to the inner side wall of the corresponding sliding long groove, and the connecting rod is slidably connected to the corresponding sliding inner side arm of the power supply long groove, so that the charging cabinet can move in the length direction of the power supply ground rail.

[0034] Optionally, the conductive sliding rod is slidably connected to the charging cabinet in a vertical direction, the conductive sliding rod is slidably connected to the inner side wall of the sliding long groove in a vertical direction, and a vertical driving member for driving the conductive sliding rod to move in a vertical direction is provided on the charging cabinet;

[0035] The conductive sliding rod is rotatably connected to the power connection rod, and a power connection driving member for driving the power connection rod to rotate is arranged between the power connection rod and the conductive sliding rod. When the power connection rod is rotated to the point where the length direction of the power connection rod is along the length direction of the power connection long slot, the power connection rod can be slidably connected to the inner side wall of the sliding long slot along the vertical direction.

[0036] By adopting the above technical solution, since the power connection rod can be rotated under the drive of the power connection driving member, when the length direction of the power connection rod is along the length direction of the power connection long slot, the power connection rod can be slidably connected with the inner side wall of the sliding long slot along the direction, and since the conductive sliding rod can be slidably connected with the inner side wall of the sliding long slot along the vertical direction under the drive of the vertical driving member.

[0037] Therefore, through the cooperation of the vertical drive member and the power connection drive member, the electrical connection and physical connection between the charging cabinet and the power supply ground rail can be achieved or the electrical connection and physical connection between the charging cabinet and the power supply ground rail can be cut off. When the electrical connection and physical connection between the charging cabinet and the power supply ground rail are cut off, the charging cabinet can be easily maintained or moved.

[0038] Optionally, a linear ejection assembly is provided on the inner side wall of the charging slot, and the linear ejection assembly includes a linear ejection plate, which is slidably connected to the inner side wall of the charging slot along the depth direction of the charging slot, and a linear ejection drive member is provided on the linear ejection plate for driving the linear ejection plate to move along the depth direction of the charging slot.

[0039] By adopting the above technical solution, the linear ejection plate cooperates with the linear ejection drive member. Under the drive of the linear ejection drive member, after the AGV trolley is charged, the AGV trolley can be pushed out of the charging slot, so that the AGV trolley can be quickly put into place for work.

[0040] In summary, the present application includes at least one of the following beneficial technical effects:

[0041] 1. This application realizes the material connection between different CNC machine tools through the cooperation of AGV carts and handling robots, and reduces the spatial distance restrictions between CNC machine tools corresponding to different processing links.

[0042] 2. This application enables the setting of the charging cabinet to be moved so that when the distance between the charging cabinet and the AGV is too far, it can be moved to the vicinity of the AGV in time, thereby reducing the possibility of the AGV stopping. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of the CNC machining center of the present application.

[0044] Figure 2 It is a schematic diagram of the overall structure of the charging cabinet of this application.

[0045] Figure 3 It is a schematic diagram of the cross-sectional structure of the charging cabinet of the present application.

[0046] Figure 4 yes Figure 3Schematic diagram of the local enlarged structure of part A.

[0047] In the figure, 1. CNC machine tool; 2. Shelf; 3. Loading and unloading robot; 4. AGV trolley; 5. Handling robot; 6. Charging cabinet; 61. Mobile base; 611. Driving wheel; 612. Driving motor; 62. Power connection part; 621. Conductive sliding rod; 622. Power connection rod; 623. Vertical driving part; 624. Power connection driving part; 63. Charging column; 631. Charging slot; 632. Linear ejection assembly; 6321. Linear ejection plate; 6322. Linear ejection driving part; 64. Protective shell; 641. Entrance; 642. Rotating driving part; 65. Hidden slot; 7. Power supply ground rail; 71. Sliding long slot; 72. Power connection long slot. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0049] A CNC machining center, referring to Figure 1 , including a CNC machine tool 1, a shelf 2 is set on one side of the CNC machine tool 1, and a loading and unloading robot 3 is set between the shelf 2 and the corresponding CNC machine tool 1. The loading and unloading robot 3 in this application adopts a robot driven by a three-axis mobile platform, so that the material handling between the shelf 2 and the CNC machine tool 1 can be realized.

[0050] Reference Figure 1 and Figure 2 The CNC machining center also includes an AGV trolley 4, and a handling manipulator 5 is arranged on the upper side of the AGV trolley 4. In this application, the handling manipulator 5 adopts a six-axis manipulator. The AGV trolley 4 is located between a plurality of CNC machine tools 1. Therefore, the handling manipulator 5 can obtain the materials processed by the corresponding CNC machine tools 1 on the shelf 2, and the AGV trolley 4 can move the materials to the shelf 2 corresponding to the CNC machine tools 1 of the next processing link, and at this time, the handling manipulator 5 can transport the materials to the shelf 2.

[0051] Therefore, through the cooperation of the AGV trolley 4 and the handling manipulator 5, the CNC machine tools 1 corresponding to two adjacent processing links are no longer restricted by the spatial distance. Even if the CNC machine tool 1 corresponding to a certain processing link is stopped, the work of the processing link can be realized by the other prepared CNC machine tools 1, and the AGV trolley 4 can realize the material connection between the prepared CNC machine tools 1 and the other CNC machine tools 1.

[0052] In order to ensure accurate positioning of materials, industrial cameras are provided on the handling robot 5 and the loading and unloading robot 3 .

[0053] Reference Figure 1 and Figure 2 The CNC machining center also includes a charging cabinet 6 and a power supply rail 7. The power supply rail 7 is embedded in the ground. Several CNC machine tools 1 are distributed on both sides of the power supply rail 7 in the width direction. The power supply rail 7 is embedded with a power cord. A power connection piece 62 is provided on the lower side of the charging cabinet 6. The two ends of the power connection piece 62 are electrically connected to the charging cabinet 6 and the power supply rail 7 respectively. The power connection piece 62 is slidably connected to the power supply rail 7 along the length direction of the power supply rail 7. A mobile base 61 is provided on the lower side of the charging cabinet 6. Several driving wheels 611 are provided on the mobile base 61. A driving motor 612 is also provided on the mobile base 61. Therefore, driven by the driving motor 612, the charging cabinet 6 can move along the length direction of the power supply rail 7, and can then actively approach the AGV trolley 4 that needs to be charged, so as to realize the charging of the AGV trolley 4.

[0054] Reference Figure 2 and Figure 3 The charging cabinet 6 includes a protective shell 64, a charging column 63 is arranged inside the protective shell 64, the charging column 63 is electrically connected to the power connector 62, the charging column 63 is arranged axially in the vertical direction, the peripheral side walls of the protective shell 64 are provided with an entry 641, and the outer side wall of the charging column 63 is provided with a plurality of charging slots 631, the charging slots 631 are arranged one by one with the entry 641, and the charging slots 631 are connected with the entry 641, the lower inner side wall of the charging slot 631 is flush with the lower inner side wall of the entry 641, and the bottom wall of the charging slot 631 is embedded with a wireless charger. Therefore, the AGV lower trolley can move to the corresponding charging slot 631, and then the AGV trolley 4 can be charged by the wireless charger.

[0055] Reference Figure 2 and Figure 3 The bottom of the charging slot 631 is provided with a clearance slot, and a linear push plate 6321 is inserted in the clearance slot. The linear push plate 6321 is slidably connected to the inner wall of the clearance slot along the opening direction of the clearance slot, and the linear push plate 6321 is slidably connected to the inner wall of the charging slot 631 along the opening direction of the charging slot 631. A linear push drive 6322 is provided between the linear push plate 6321 and the bottom of the clearance slot. In this application, the linear push drive 6322 adopts a linear push rod, and the two ends of the linear push drive 6322 are respectively connected to the linear push plate 6321 and the bottom of the clearance slot. Therefore, under the drive of the linear push drive 6322, after the AGV trolley 4 is charged, the AGV trolley 4 can be pushed out of the charging slot 631, so that the AGV trolley 4 can be quickly put into place for work.

[0056] Reference Figure 2 and Figure 3The charging column 63 is rotatably connected to the protective shell 64, and one end of the charging column 63 is coaxially connected to a rotating drive member 642, which is a motor, and is connected to the inner wall of the protective shell 64. Therefore, when the AGV 4 enters the corresponding charging slot 631, the charging column 63 can be rotated 45° by the driving of the rotating drive member 642, so that the charging slot 631 is closed by the protective shell 64, so that the AGV 4 cannot get out of the charging slot 631, thereby protecting the AGV 4.

[0057] Reference Figure 3 and Figure 4 The upper side of the power supply rail 7 is provided with a long sliding groove 71, the length direction of which is arranged along the length direction of the power supply rail 7, and the bottom of the sliding groove 71 is provided with a long power connection groove 72, the length direction of which is arranged along the length direction of the power supply rail 7, the width of the long power connection groove 72 is greater than the width of the sliding groove 71, and the power line is embedded in the two inner side walls of the long power connection groove 72 along its own width direction. Therefore, the coordinated arrangement of the long sliding groove 71 and the long power connection groove 72 makes it difficult for foreign objects to contact the power line, thereby improving the safety of the power supply rail 7.

[0058] Reference Figure 3 and Figure 4 The power connection part 62 includes a conductive sliding rod 621, which is axially arranged in the vertical direction, and the upper end of the conductive sliding rod 621 is electrically connected to the charging column 63, and the conductive sliding rod 621 is plugged and matched with the sliding long groove 71 in the vertical direction; the lower end of the conductive sliding rod 621 is provided with a power connection rod 622, which is axially arranged in the horizontal direction, and the axial ends of the power connection rod 622 are respectively in contact with the inner side walls corresponding to the width direction of the power connection long groove 72, and the power connection rod 622 is slidably connected with the inner wall of the power connection long groove 72 along the length direction of the power supply ground rail 7. Therefore, the setting of the power connection rod 622 and the conductive sliding rod 621 ensures that the charging cabinet 6 can slide along the length direction of the power supply ground rail 7 while the charging cabinet 6 can be connected to electricity.

[0059] Reference Figure 3 and Figure 4 The middle of the power connecting rod 622 is connected to the lower end of the conductive sliding rod 621, and the power connecting rod 622 is rotatably connected to the conductive sliding rod 621. The end of the conductive sliding rod 621 facing the power connecting rod 622 is provided with a power connecting drive 624, which adopts a motor, and is connected to the power connecting rod 622. The power connecting drive 624 adopts a motor, and the output shaft of the power connecting drive 624 is arranged in the vertical direction and connected to the middle of the power connecting rod 622. Therefore, under the drive of the power connecting drive 624, the power connecting rod 622 can be rotated to be parallel to the length direction of the power supply ground rail 7.

[0060] Reference Figure 3 and Figure 4 , the conductive slide bar 621 is slidably connected to the inner wall of the sliding long groove 71 along the vertical direction, and the connecting rod 622 is slidably connected to the inner wall of the sliding long groove 71 along the vertical direction. A hidden groove 65 is provided on the lower side of the charging cabinet 6, and a vertical driving member 623 is provided at the bottom of the hidden groove 65. In this application, the vertical driving member 623 adopts a linear push rod, and the output end of the vertical driving member 623 is connected to the conductive slide bar 621, and the conductive slide bar 621 is slidably connected to the inner wall of the hidden groove 65 along the vertical direction. Therefore, the conductive slide bar 621 can be retracted into the hidden groove 65 by the vertical driving member 623, and then the electrical connection and physical connection between the charging cabinet 6 and the power supply ground rail 7 can be cut off. At this time, the charging cabinet 6 can be maintained or transported.

[0061] The implementation principle of the embodiment of the present application is as follows: an AGV trolley 4 is arranged between several CNC machine tools 1, and the CNC machine tool 1 realizes the material transportation between the CNC machine tool 1 and the corresponding shelf 2 through the loading and unloading robot 3, and the AGV trolley 4 realizes the material transportation between different CNC machine tools 1 through the transportation robot 5. When the AGV trolley 4 has no power or the power is too low, the AGV trolley 4 and the charging cabinet 6 move close to each other, so that the AGV trolley 4 can quickly enter the charging cabinet 6 for charging.

[0062] In addition, multiple AGV carts 4 can be configured. When a working AGV cart 4 runs out of power, the out-of-power AGV cart 4 is sent into the charging cabinet 6 while another fully charged AGV cart 4 is sent out of the charging cabinet 6, thereby ensuring that the entire CNC machining center can continue processing.

[0063] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A CNC machining center, characterized in that: It comprises a plurality of CNC numerically controlled machine tools (1), wherein a shelf (2) is arranged on one side of the CNC numerically controlled machine tools (1), and a loading and unloading manipulator (3) is arranged between the shelf (2) and the corresponding CNC numerically controlled machine tools (1); It also includes an AGV trolley (4), the AGV trolley (4) being arranged between the plurality of CNC machine tools (1), and a transport manipulator (5) being arranged on the upper side of the AGV trolley (4); It also includes a charging cabinet (6) for charging the AGV vehicle (4).

2. A CNC machining center according to claim 1, characterized in that: A mobile base (61) is provided at the lower side of the charging cabinet (6), a plurality of driving wheels (611) are provided on the mobile base (61), and a driving motor (612) for driving the driving wheels (611) is provided on the mobile base (61); The CNC machining center further comprises a power supply ground rail (7) having a power line embedded therein, and the plurality of CNC machine tools (1) are distributed on both sides of the power supply ground rail (7) in a width direction; The movable base (61) is located on the upper side of the power supply ground rail (7) in the vertical direction, and the moving direction of the movable base (61) is arranged along the length direction of the power supply ground rail (7); A power connection piece (62) is provided on the lower side of the charging cabinet (6), one end of the power connection piece (62) is electrically connected to the charging cabinet (6), and the other end is electrically connected to the power supply ground rail (7), and the power connection piece (62) is slidably connected to the power supply ground rail (7) along the length direction of the power supply ground rail (7).

3. A CNC machining center according to claim 2, characterized in that: The charging cabinet (6) comprises a protective shell (64), the protective shell (64) being arranged on the mobile base (61), a charging column (63) being arranged in the protective shell (64), the charging column (63) being arranged in a vertical direction, a plurality of charging slots (631) being arranged around the charging column (63), a wireless charger being embedded in the inner bottom wall of the charging slot (631), a plurality of entrances (641) being arranged around the protective shell (64), the entrances (641) being arranged in one-to-one correspondence with the charging slots (631), and the entrances (641) and the corresponding charging slots (631) being communicated with each other.

4. A CNC machining center according to claim 3, characterized in that: The charging column (63) is rotatably connected to the protective shell (64), and the charging column (63) is coaxially connected to a rotating driving member (642) for driving the charging column (63) to rotate.

5. A CNC machining center according to claim 2, characterized in that: A long sliding groove (71) is provided on the upper side of the power supply ground rail (7), and the length direction of the long sliding groove (71) is arranged along the length direction of the power supply ground rail (7); A power connection long slot (72) is provided at the bottom of the long sliding slot (71), and the length direction of the power connection long slot (72) is arranged along the length direction of the power supply ground rail (7); The width of the power connection long slot (72) is greater than the width of the sliding long slot (71), and the power line is arranged on two opposite inner side walls of the power connection long slot (72) along its own width direction.

6. A CNC machining center according to claim 5, characterized in that: The power connection member (62) comprises a conductive sliding rod (621) and a power connection rod (622); the conductive sliding rod (621) is axially arranged in a vertical direction; the conductive sliding rod (621) is plug-fitted with the long sliding groove (71); the conductive sliding rod (621) is slidably connected to the inner side wall of the long sliding groove (71) along the length direction of the power supply ground rail (7); The power connection rod (622) is axially arranged along the width direction of the power connection long slot (72), the conductive sliding rod (621) is connected to the middle part of the power connection rod (622), both ends of the power connection rod (622) in the length direction respectively contact the inner side walls corresponding to the width direction of the power connection long slot (72), and the power connection rod (622) is slidably connected to the inner side wall of the power connection long slot (72) along the length direction of the power supply ground rail (7).

7. A CNC machining center according to claim 6, characterized in that: The conductive sliding rod (621) is slidably connected to the charging cabinet (6) in a vertical direction, the conductive sliding rod (621) is slidably connected to the inner side wall of the sliding long groove (71) in a vertical direction, and a vertical driving member (623) for driving the conductive sliding rod (621) to move in a vertical direction is provided on the charging cabinet (6); The conductive sliding rod (621) is rotatably connected to the power connection rod (622), and a power connection driving member (624) for driving the power connection rod (622) to rotate is provided between the power connection rod (622) and the conductive sliding rod (621). When the power connection rod (622) is rotated to the point where the length direction of the power connection rod (622) is along the length direction of the power connection long slot (72), the power connection rod (622) can be slidably connected to the inner side wall of the sliding long slot (71) in the vertical direction.

8. A CNC machining center according to claim 3, characterized in that: A linear ejection assembly (632) is provided on the inner side wall of the charging slot (631), and the linear ejection assembly (632) comprises a linear ejection plate (6321), and the linear ejection plate (6321) is slidably connected to the inner side wall of the charging slot (631) along the depth direction of the charging slot (631), and a linear ejection driving member (6322) is provided on the linear ejection plate (6321) for driving the linear ejection plate (6321) to move along the depth direction of the charging slot (631).

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