Automatic clamping zero point quick change structure of machining center

Abstract

The application discloses a machining center automatic loose clamping zero point quick change structure and relates to the technical field of machining center zero point quick change. The machining center automatic loose clamping zero point quick change structure is connected with the Pascal male connector and the Pascal female connector through butt joint, utilizes the physical characteristics of the self-sealing structures of the two, realizes automatic connection and disconnection of the gas source under the pressure state without leakage, improves the problem that the traditional manual plugging of the gas pipe interface is prone to wear of the sealing ring and leakage caused by disconnection, greatly reduces the risk of clamping failure of the positioning chuck caused by insufficient gas pressure, simultaneously realizes quick connection of the gas circuit without manual intervention, significantly improves the safety and reliability of equipment operation, avoids tedious manual plugging operation of the operator in a narrow space, and greatly enhances the convenience of gas circuit connection.

Description

Technical Field

[0001] This invention relates to the field of zero-point quick change technology for machining centers, specifically to an automatic clamping and zero-point quick change structure for machining centers. Background Technology

[0002] In the zero-point quick change system of machining center, "zero point" specifically refers to the fixed mechanical reference point used for workpiece or fixture positioning and locking. It is defined as a unified physical reference origin established between the machine tool table and the pallet through standardized positioning and locking devices, such as precision modules such as tapered pins or steel balls. This reference point ensures that the spatial coordinate position of the workpiece remains unchanged when it moves between different processes, workstations or machine tools, thereby achieving high-precision quick change without alignment, greatly reducing auxiliary downtime and ensuring the consistency of processing.

[0003] In existing technologies, zero-point unclamping in machining centers typically relies on manual operation for workpiece positioning, locking, and pneumatic pipeline insertion and removal. During operation, workers need to frequently insert and remove the pneumatic pipelines, significantly reducing the sealing and accuracy of the interconnected pipelines. This reduces operational efficiency and can easily lead to longer loading and unloading cycles. Furthermore, the labor cost is high, and human error and deviation during manual operation can reduce the consistency and precision of workpiece processing, thereby lowering the accuracy and production efficiency of the workpiece during production.

[0004] Combining the above issues, we find that existing zero-point positioning equipment for machining centers on the market cannot simultaneously avoid the problems mentioned above. Even if they can be solved, they require the use of external tools, thus failing to achieve the desired effect. Therefore, we propose an automatic clamping and zero-point quick-change structure for machining centers. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic clamping and zero-point quick-change structure for machining centers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic clamping and zero-point quick-change structure for a machining center, comprising a machine tool frame, a machine tool water receiving tray fixedly connected to one side of the machine tool frame, a drive mechanism fixedly connected to the top of the machine tool water receiving tray, a machining center worktable provided on one side of the machine tool frame, a zero-point positioning template fixedly connected to the top of the machining center worktable, a zero-point positioning plate provided on the top of the zero-point positioning template, and a workpiece body provided on the top of the zero-point positioning plate.

[0007] Preferably, the drive mechanism includes a fixed base, the bottom of which is fixedly connected to the top of the machine tool water receiving tray. A cylinder mounting bracket is provided on the top of the fixed base. A double-piston cylinder is fixedly connected to one side of the cylinder mounting bracket. A one-way throttle valve connector is provided on one side of the double-piston cylinder. There are two one-way throttle valve connectors. A Pascal male connector mounting block is fixedly connected to the output end of the double-piston cylinder. A positioning chuck air supply interface is fixedly connected to one side of the Pascal male connector mounting block. One end of the positioning chuck air supply interface is connected to the inner cavity of the Pascal male connector mounting block. A Pascal male connector is fixedly connected to the top of the Pascal male connector mounting block.

[0008] Preferably, the zero-point positioning template includes a positioning chuck mounting mother plate, the bottom of which is fixedly connected to the top of the machining center worktable, a Pascal female connector mounting block is fixedly connected to the bottom of the positioning chuck mounting mother plate, a Pascal female connector is fixedly connected to the inner cavity of the Pascal female connector mounting block, and a zero-point positioning chuck is fixedly connected to the inner cavity of the positioning chuck mounting mother plate.

[0009] Preferably, the zero-point positioning plate includes a zero-point positioning sub-plate, which is disposed on the top of the positioning chuck mounting mother plate. A zero-point positioning pin is fixedly connected to the bottom of the zero-point positioning sub-plate, and the surface of the zero-point positioning pin is adapted to the inner cavity of the zero-point positioning chuck.

[0010] Preferably, a cleaning air supply interface is fixedly connected to one side of the Pascal male connector mounting block, one end of the cleaning air supply interface is adapted to the inner cavity of the Pascal male connector mounting block, and a cleaning air pipeline is fixedly connected to the inner cavity of the Pascal male connector mounting block.

[0011] Preferably, a grinding disc is provided on the top of the fixed base, and the grinding disc is disposed between the top of the fixed base and the bottom of the cylinder mounting bracket.

[0012] Preferably, a cylinder fixing bracket is fixedly connected to one side of the dual-piston cylinder, one side of the cylinder fixing bracket is fixedly connected to one side of the cylinder mounting bracket, a cylinder fixing plate is fixedly connected to one side of the cylinder mounting bracket, and one side of the cylinder fixing plate is fixedly connected to one side of the dual-piston cylinder.

[0013] Preferably, the top of the Pascal male connector mounting block is fixedly connected with a positioning pin, and the bottom of the Pascal female connector mounting block is provided with a positioning hole, the size of which is adapted to the size of the positioning pin.

[0014] Preferably, a support block is fixedly connected to one side of the cylinder mounting bracket, the top of the support block is fixedly connected to the bottom of the double piston cylinder, and reinforcing plates are fixedly connected to both sides of the mounting base.

[0015] Preferably, both sides of the Pascal female connector mounting block are fixedly connected to reinforcing blocks, and the bottom of both reinforcing blocks are provided with threaded holes.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes the mating of Pascal male and female connectors, leveraging their self-sealing structure, to achieve automatic, leak-free connection and disconnection of the air source under pressure. This improves upon the traditional manual insertion and removal of air pipe interfaces, which is prone to issues such as worn sealing rings and incomplete connections leading to air leaks. It significantly reduces the risk of positioning chuck clamping failure due to insufficient air pressure. Furthermore, it allows for rapid connection of the air circuit without manual intervention, significantly enhancing the safety and reliability of equipment operation. It also eliminates the need for operators to perform tedious manual insertion and removal operations in confined spaces, greatly enhancing the convenience of air circuit connection.

[0017] 2. This invention uses a dual-piston cylinder to drive the Pascal male connector mounting block to perform precise up-and-down reciprocating motion. Combined with the rapid insertion and removal characteristics of the Pascal male and female connectors, it achieves fully automatic zero-point positioning and clamping. This improves upon the slow cycle time caused by the reliance on manual handling, alignment, and locking in traditional assembly methods. It significantly shortens the replacement time between the workpiece body and the zero-point positioning subplate, greatly improves the throughput efficiency of the machining center's automated line, effectively avoids positioning deviations caused by human fatigue or errors, ensures the repeatability of the workpiece body's positioning accuracy during multiple assembly processes, and greatly improves the overall processing efficiency of the production line. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic diagram of the cleaning air blowing pipeline of the present invention; Figure 4 This is a schematic diagram of the structure of the cylinder fixing plate of the present invention; Figure 5 This is a schematic diagram of the positioning chuck mounting mother plate of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the zero-point positioning pin of the present invention; Figure 8 This is a schematic diagram of the zero-point positioning chuck of the present invention.

[0019] In the diagram: 1. Drive mechanism; 101. Fixed base; 102. Cylinder mounting bracket; 103. Double piston cylinder; 104. One-way throttle valve connector; 105. Positioning chuck air supply interface; 106. Pascal male connector mounting block; 107. Pascal male connector; 2. Machine tool water receiving tray; 3. Machining center worktable; 4. Zero-point positioning template; 401. Positioning chuck mounting plate; 402. Zero-point positioning chuck; 403. Pascal female connector 5. Head mounting block; 404 Pascal female connector; 6. Zero-point positioning plate; 7. Zero-point positioning sub-plate; 8. Zero-point positioning pin; 9. Workpiece body; 10. Machine tool frame; 11. Grinding disc; 12. Cylinder fixing bracket; 13. Cleaning air supply interface; 14. Cleaning air pipeline; 15. Cylinder fixing plate; 16. Positioning pin; 17. Positioning hole; 18. Reinforcing block; 19. Threaded hole; 10. Support auxiliary block; 11. Reinforcing plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1-8 The present invention provides a technical solution: an automatic clamping and zero-point quick-change structure for a machining center, including a machine tool frame 7, a machine tool water receiving tray 2 fixedly connected to one side of the machine tool frame 7, a drive mechanism 1 fixedly connected to the top of the machine tool water receiving tray 2, a machining center worktable 3 provided on one side of the machine tool frame 7, a zero-point positioning template 4 fixedly connected to the top of the machining center worktable 3, a zero-point positioning plate 5 provided on the top of the zero-point positioning template 4, and a workpiece body 6 provided on the top of the zero-point positioning plate 5.

[0022] As a further definition of the drive mechanism 1, zero-point positioning template 4, and zero-point positioning plate 5 of the present invention, the drive mechanism 1 includes a fixed base 101. The bottom of the fixed base 101 is fixedly connected to the top of the machine tool water receiving tray 2. A cylinder mounting bracket 102 is provided on the top of the fixed base 101. A double piston cylinder 103 is fixedly connected to one side of the cylinder mounting bracket 102. A one-way throttle valve connector 104 is provided on one side of the double piston cylinder 103. There are two one-way throttle valve connectors 104. A Pascal male connector mounting block 106 is fixedly connected to the output end of the double piston cylinder 103. A positioning chuck air supply interface 105 is fixedly connected to one side of the Pascal male connector mounting block 106. One end of the positioning chuck air supply interface 105 is connected to the inner cavity of the Pascal male connector mounting block 106. A Pascal male connector 107 is fixedly connected to the top of the Pascal male connector mounting block 106.

[0023] The zero-point positioning template 4 includes a positioning chuck mounting mother plate 401. The bottom of the positioning chuck mounting mother plate 401 is fixedly connected to the top of the machining center worktable 3. A Pascal female connector mounting block 403 is fixedly connected to the bottom of the positioning chuck mounting mother plate 401. A Pascal female connector 404 is fixedly connected to the inner cavity of the Pascal female connector mounting block 403. A zero-point positioning chuck 402 is fixedly connected to the inner cavity of the positioning chuck mounting mother plate 401.

[0024] The zero-point positioning plate 5 includes a zero-point positioning sub-plate 501, which is located on the top of the positioning chuck mounting mother plate 401. A zero-point positioning pin 502 is fixedly connected to the bottom of the zero-point positioning sub-plate 501, and the surface of the zero-point positioning pin 502 is adapted to the inner cavity of the zero-point positioning chuck 402.

[0025] The mounting base 101 connects to the cylinder mounting bracket 102, enabling the dual-piston cylinder 103 connected to one side of the cylinder mounting bracket 102 to operate normally. The dual-piston cylinder 103 drives the Pascal male connector mounting block 106 to move up and down through its own operation. Two one-way throttle valve connectors 104 are provided on one side of the dual-piston cylinder 103. These two one-way throttle valve connectors 104 primarily provide a connection between the dual-piston cylinder 103 and an external air source, and the extension / retraction speed of the output end of the dual-piston cylinder 103 can be controlled by the airflow from the external air source. The positioning chuck air supply interface 105 is connected to the Pascal male connector 107 through the Pascal male connector mounting block 106, allowing the external air source to... Air flows smoothly into the Pascal male connector 107 through the positioning chuck air supply interface 105 and the Pascal male connector mounting block 106. When the Pascal male connector mounting block 106 moves to the bottom of the positioning chuck mounting mother plate 401 through the operation of the double piston cylinder 103, the airflow connected inside the Pascal male connector 107 can enter the interior of the zero-point positioning chuck 402, thereby providing an air source to the zero-point positioning chuck 402. At the same time, the external air pipeline connected to the double piston cylinder 103 can be controlled by a solenoid valve. The solenoid valve is connected to an external PLC controller, and the PLC controller controls the solenoid valve to ventilate the double piston cylinder 103. This is existing technology in the field, so it will not be described in detail here. Furthermore, the positioning chuck mounting plate 401 can connect the Pascal female connector mounting block 403 and the zero-point positioning chuck 402, while the Pascal female connector mounting block 403 is used to install the Pascal female connector 404. The positioning chuck mounting plate 401 is connected to the top of the machining center worktable 3, thereby enabling the machining center worktable 3 to provide support and installation for the zero-point positioning template 4. The Pascal male connector 107 can quickly mate and install with the Pascal female connector 404 connected to the inner cavity of the Pascal female connector mounting block 403, allowing the positioning chuck to be positioned... The airflow entering the Pascal male connector 107 through the air supply interface 105 of the chuck and the Pascal male connector mounting block 106 can flow into the Pascal female connector 404. At the same time, the Pascal female connector 404 is connected to the zero-point positioning chuck 402. When the airflow flows into the Pascal female connector 404, it can drive the zero-point positioning chuck 402. The zero-point positioning chuck 402 is mainly used for fast and high-precision positioning and locking of the zero-point positioning plate 5, so as to fix the zero-point positioning plate 5 and the workpiece body 6 on the top of the zero-point positioning plate 5. In addition, the zero-point positioning subplate 501 is mainly used to support the workpiece body 6. At the same time, the zero-point positioning subplate 501 can also connect to the zero-point positioning pin 502. When the zero-point positioning pin 502 at the bottom of the zero-point positioning subplate 501 is inserted into the zero-point positioning chuck 402, the zero-point positioning subplate 501, the zero-point positioning pin 502 and the workpiece body 6 can be positioned by the zero-point positioning chuck 402, thereby locking and fixing the workpiece body 6.

[0026] A cleaning air supply interface 10 is fixedly connected to one side of the Pascal male connector mounting block 106. One end of the cleaning air supply interface 10 is adapted to the inner cavity of the Pascal male connector mounting block 106. A cleaning air pipeline 11 is fixedly connected to the inner cavity of the Pascal male connector mounting block 106.

[0027] A grinding disc 8 is provided on the top of the fixed base 101, and the grinding disc 8 is located between the top of the fixed base 101 and the bottom of the cylinder mounting bracket 102.

[0028] A cylinder fixing bracket 9 is fixedly connected to one side of the dual piston cylinder 103. One side of the cylinder fixing bracket 9 is fixedly connected to one side of the cylinder mounting bracket 102. A cylinder fixing plate 12 is fixedly connected to one side of the cylinder mounting bracket 102. One side of the cylinder fixing plate 12 is fixedly connected to one side of the dual piston cylinder 103.

[0029] The top of the Pascal male connector mounting block 106 is fixedly connected with a positioning pin 13, and the bottom of the Pascal female connector mounting block 403 is provided with a positioning hole 14, the size of the positioning pin 13 being adapted to the size of the positioning hole 14.

[0030] The Pascal male connector mounting block 106 connects the cleaning air blowing pipeline 11 and the cleaning air blowing supply interface 10. The cleaning air blowing pipeline 11 and the cleaning air blowing supply interface 10 are interconnected via the Pascal male connector mounting block 106. The cleaning air blowing supply interface 10 is connected to an external air pipeline, allowing airflow to smoothly flow into the cleaning air blowing pipeline 11 through the cleaning air blowing supply interface 10. Before connecting the Pascal female connector 404 and the Pascal male connector 107, an external PLC controller can control the solenoid valve and open the air pipeline connected to the cleaning air blowing supply interface 10, enabling the cleaning air blowing pipeline 11 to spray airflow towards the Pascal male connector 107. 07 and Pascal female connector mounting block 403, thereby blowing away debris and impurities on the surfaces of both, improving the stability, accuracy and sealing of the connection between them. The cylinder fixing bracket 9 can use its connection with the cylinder mounting bracket 102 to provide stability and reinforcement for the connection between the double piston cylinder 103 and the cylinder mounting bracket 102, so that the double piston cylinder 103 can be firmly and stably operated and used on one side of the cylinder mounting bracket 102. The cylinder fixing plate 12 can also assist the cylinder fixing bracket 9, so that the double piston cylinder 103 has sufficient stability when driving the Pascal male connector mounting block 106 to move up and down. Furthermore, the grinding disc 8 can connect with the fixed base 101 and the cylinder mounting bracket 102, and adjust the operating angle of the cylinder mounting bracket 102 using its own grinding disc. This allows the cleaning air blowing pipeline 11 to more smoothly and effectively blow away impurities from the surfaces of the Pascal male connector 107 and the Pascal female connector mounting block 403. When the Pascal male connector mounting block 106 moves upward to connect the Pascal male connector 107 and the Pascal female connector 404, the positioning pin 13 and the positioning hole 14 can position and limit the connection and contact between the Pascal male connector mounting block 106 and the Pascal female connector mounting block 403, thereby improving the accuracy and tightness between the Pascal male connector mounting block 106 and the Pascal female connector 404 when they are connected.

[0031] A support block 17 is fixedly connected to one side of the cylinder mounting bracket 102. The top of the support block 17 is fixedly connected to the bottom of the double piston cylinder 103. Reinforcing plates 18 are fixedly connected to both sides of the mounting base 101.

[0032] Both sides of the Pascal female connector mounting block 403 are fixedly connected with reinforcing blocks 15, and the bottom of both reinforcing blocks 15 is provided with threaded holes 16.

[0033] The support block 17 can support and reinforce the double piston cylinder 103 by connecting itself with the cylinder mounting bracket 102 and the double piston cylinder 103, thereby further improving the stability of the double piston cylinder 103 during use. The reinforcing plate 18 can be connected to the machine tool water receiving tray 2 by bolts, so that while the fixed seat 101 provides support and load-bearing for the cylinder mounting bracket 102, the fixed seat 101 is not easy to shake during use. The reinforcing block 15 can be connected to the positioning chuck mounting plate 401 by bolts or other tools through the threaded hole 16 on one side, thereby restricting the use of the Pascal female connector mounting block 403 and reducing the shaking and tilting after long-term use.

[0034] The specific implementation of this embodiment is as follows: When the machining center needs to perform loading and unloading operations, the machine tool first sends a signal to the PLC controller. The PLC controller then activates the external solenoid valve, connecting the external air source to the cleaning air supply interface 10 through a pipeline, and introducing compressed gas into the cleaning air supply pipeline 11. At this time, the cleaning air supply pipeline 11 sprays airflow onto the contact surface between the Pascal male connector 107 and the Pascal female connector mounting block 403, using the airflow to blow away debris and impurities from the surface of the Pascal male connector 107 and the bottom of the Pascal female connector mounting block 403, ensuring the sealing and accuracy of subsequent connections. The cleaning air supply pipeline 11 continues to blow airflow. At the same time, the PLC controller also sends a signal to drive another solenoid valve to activate, allowing the external air source to enter the double piston cylinder 103 through the one-way throttle valve connector 104. The double piston cylinder 103 is driven by air pressure. The downward push extends its output end upward, causing the Pascal male connector mounting block 106 and the Pascal male connector 107 fixed on its top to rise vertically. During the rising process, the positioning pin 13 will be inserted into the cavity of the positioning hole 14, which will serve as a guide and limit until the Pascal male connector 107 and the Pascal female connector 404 are fully fitted and connected. At this time, the external air source flows into the zero-point positioning chuck 402 through the connection of the positioning chuck air supply interface 105, the Pascal male connector mounting block 106, the Pascal male connector 107 and the Pascal female connector 404, driving the zero-point positioning chuck 402 to operate and release the clamp on the zero-point positioning pin 502. At this time, the zero-point positioning pin 502 and the zero-point positioning sub-plate 501 can be separated from the inside of the positioning chuck mounting mother plate 401, realizing the unlocking and unloading of the zero-point positioning plate 5 and the workpiece body 6. After the material is unloaded, the machine tool confirms that the mechanical status is correct. Then, the automatic machining line moves the zero-point positioning plate 5, which is equipped with the new workpiece body 6, to the top of the zero-point positioning template 4. The PLC controller sends a signal again to drive the double piston cylinder 103 to operate in reverse, so that its output end drives the Pascal male connector mounting block 106 and the Pascal male connector 107 to descend, and disconnects the Pascal male connector 107 from the Pascal female connector 404. At this time, the zero-point positioning chuck 402 will reset and re-clamp the zero-point positioning pin 502, and firmly lock the zero-point positioning plate 5, which is equipped with the new workpiece body 6, onto the positioning chuck mounting mother plate 401. Thus, the process realizes the workpiece loosening, replacement and locking without manual intervention, which greatly improves the processing efficiency and positioning accuracy.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic clamping and zero-point quick-change structure for a machining center, comprising a machine tool frame (7), characterized in that: A machine tool water receiving tray (2) is fixedly connected to one side of the machine tool frame (7), and a drive mechanism (1) is fixedly connected to the top of the machine tool water receiving tray (2). A machining center workbench (3) is provided on one side of the machine tool frame (7), and a zero-point positioning template (4) is fixedly connected to the top of the machining center workbench (3). A zero-point positioning plate (5) is provided on the top of the zero-point positioning template (4), and a workpiece body (6) is provided on the top of the zero-point positioning plate (5).

2. The automatic clamping and zero-point quick-change structure for a machining center according to claim 1, characterized in that: The drive mechanism (1) includes a fixed base (101), the bottom of which is fixedly connected to the top of the machine tool water receiving tray (2). A cylinder mounting bracket (102) is provided on the top of the fixed base (101). A double piston cylinder (103) is fixedly connected to one side of the cylinder mounting bracket (102). A one-way throttle valve connector (104) is provided on one side of the double piston cylinder (103). There are two one-way throttle valve connectors (104). A Pascal male connector mounting block (106) is fixedly connected to the output end of the double piston cylinder (103). A positioning chuck air supply interface (105) is fixedly connected to one side of the Pascal male connector mounting block (106). One end of the positioning chuck air supply interface (105) is connected to the inner cavity of the Pascal male connector mounting block (106). A Pascal male connector (107) is fixedly connected to the top of the Pascal male connector mounting block (106).

3. The automatic clamping and zero-point quick-change structure for a machining center according to claim 2, characterized in that: The zero-point positioning template (4) includes a positioning chuck mounting mother plate (401). The bottom of the positioning chuck mounting mother plate (401) is fixedly connected to the top of the machining center worktable (3). A Pascal female connector mounting block (403) is fixedly connected to the bottom of the positioning chuck mounting mother plate (401). A Pascal female connector (404) is fixedly connected to the inner cavity of the Pascal female connector mounting block (403). A zero-point positioning chuck (402) is fixedly connected to the inner cavity of the positioning chuck mounting mother plate (401).

4. The automatic clamping and zero-point quick-change structure for a machining center according to claim 1, characterized in that: The zero-point positioning plate (5) includes a zero-point positioning sub-plate (501), which is disposed on the top of the positioning chuck mounting mother plate (401). A zero-point positioning pin (502) is fixedly connected to the bottom of the zero-point positioning sub-plate (501), and the surface of the zero-point positioning pin (502) is adapted to the inner cavity of the zero-point positioning chuck (402).

5. The automatic clamping and zero-point quick-change structure for a machining center according to claim 2, characterized in that: A clean air supply port (10) is fixedly connected to one side of the Pascal male connector mounting block (106). One end of the clean air supply port (10) is adapted to the inner cavity of the Pascal male connector mounting block (106). A clean air pipeline (11) is fixedly connected to the inner cavity of the Pascal male connector mounting block (106).

6. The automatic clamping and zero-point quick-change structure for a machining center according to claim 2, characterized in that: The top of the fixed base (101) is provided with a grinding plate (8), which is located between the top of the fixed base (101) and the bottom of the cylinder mounting bracket (102).

7. The automatic clamping and zero-point quick-change structure for a machining center according to claim 6, characterized in that: A cylinder fixing bracket (9) is fixedly connected to one side of the dual piston cylinder (103). One side of the cylinder fixing bracket (9) is fixedly connected to one side of the cylinder mounting bracket (102). A cylinder fixing plate (12) is fixedly connected to one side of the cylinder mounting bracket (102). One side of the cylinder fixing plate (12) is fixedly connected to one side of the dual piston cylinder (103).

8. The automatic clamping and zero-point quick-change structure for a machining center according to claim 3, characterized in that: The top of the Pascal male connector mounting block (106) is fixedly connected with a positioning pin (13), and the bottom of the Pascal female connector mounting block (403) is provided with a positioning hole (14). The size of the positioning pin (13) is adapted to the size of the positioning hole (14).

9. The automatic clamping and zero-point quick-change structure for a machining center according to claim 2, characterized in that: A support block (17) is fixedly connected to one side of the cylinder mounting bracket (102), the top of the support block (17) is fixedly connected to the bottom of the double piston cylinder (103), and reinforcing plates (18) are fixedly connected to both sides of the fixing seat (101).

10. The automatic clamping and zero-point quick-change structure for a machining center according to claim 3, characterized in that: Both sides of the Pascal female connector mounting block (403) are fixedly connected with reinforcing blocks (15), and the bottom of the two reinforcing blocks (15) are provided with threaded holes (16).

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