Multi-station composite nut processing machine tool and processing method

Abstract

The invention relates to the technical field of machining machine tools, in particular to a multi-station composite nut machining machine tool and a machining method.The multi-station composite nut machining machine tool is characterized by comprising a machine tool base, a rotating disc mechanism is installed in the center of the machine tool base, and at least one machining unit is arranged on each of the two sides of the rotating disc mechanism; the turntable mechanism comprises a turntable driving machine, a turntable driving frame, a turntable main body, a turntable main shaft, a shaft seat, a coding disc and a detector, the turntable driving machine drives an input shaft of the turntable driving frame, the turntable driving frame is assembled with the turntable main body through the turntable main shaft and drives the turntable main body to rotate, and the end part of the turntable main shaft is mounted on the shaft seat through a bearing; the coding disc is fixed on the turntable main shaft; the detector is matched on the coding disc and is used for detecting the coding disc to feed back a real-time position signal of the turntable; according to the multi-station combined machining device, the rotating disc mechanism is matched with the machining unit, station switching or station combined machining is achieved, and the efficient machining effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tools, and particularly relates to a multi-station composite nut processing machine tool and a processing method. Background Art

[0002] The processing process of nut fittings in the prior art involves internal thread tapping and end face turning; the nut clamping structure is relatively bulky on the machine tool. In the existing technology, a manipulator is usually used for clamping. The manipulator is controlled by a cylinder or other power sources and clamps and processes the workpieces one by one. In this way, the efficiency of the nut processing process is relatively slow. Since the manipulator has a wide application in the existing technology and can pick up and transfer workpieces, its disadvantage is that it cannot let the manipulator clamp the workpiece to cooperate with the tool for processing. Because the tool rotates at a high speed, the vibration generated during the turning process cannot be tolerated by the manipulator. Therefore, the manipulator is suitable for the clamping and transfer operations of workpieces, and a stable fixture is required to stably clamp and position the workpiece to meet the processing requirements.

[0003] Chinese Patent with Application No. 202210977207.9 discloses a machine tool and a composite processing technology for processing the lead screw nut of an electronic brake system. This machine tool and technology are dedicated to the processing of the lead screw nut of an electronic brake system. During the processing, the workpiece is positioned and installed by the way of internally supporting the inner hole of the workpiece to be processed in the workpiece spindle. Then, the external thread of the workpiece is gradually processed by the turning tool holder, the outer circle and the outer end face of the workpiece to be processed are processed by the outer circle end face processing grinding wheel, and the inner raceway of the workpiece to be processed is processed by the internal thread processing grinding wheel until the workpiece processing is completed. This machine tool and composite processing method can complete the full processing process of the product through one clamping of the lead screw nut workpiece of the electronic brake system.

[0004] The above technical solution only aims at the lead screw nut workpiece of the electronic brake system, and the processed products are too limited. Although this solution does not require repeated disassembly, installation and tool setting between multiple processes, when multiple nuts need to be processed, there is still the process of disassembling and assembling the nuts, which causes the processing of other tools to pause. After the nuts are assembled, the processing is carried out. Therefore, this waiting time results in low efficiency in the case of batch processing of nuts.

[0005] Currently, for the enterprise production process, batch and efficient processing is very urgent. To increase the output of nut processing, it depends on the efficient and stable operation of the equipment. Summary of the Invention

[0006] In order to solve the technical problems and disadvantages in the prior art, the present invention provides a multi-station composite nut processing machine tool and a processing method, which can overcome the technical problems of insufficient processing efficiency and insufficient energy saving in the prior art.

[0007] To achieve the above object and other related objects, the present invention adopts the following technical solutions:

[0008] A multi-station composite nut processing machine tool includes a machine tool base. A turntable mechanism is installed at the central position of the machine tool base. At least one processing unit is provided on each side of the turntable mechanism. The turntable mechanism includes a turntable drive motor, a turntable drive frame, a turntable body, a turntable main shaft, a shaft seat, a code disk, and a detector. The turntable drive motor drives the input shaft of the turntable drive frame by a belt drive method. The turntable drive frame assembles the turntable body through the turntable main shaft and drives the turntable body to rotate. The end of the turntable main shaft is installed on the shaft seat through a bearing. The code disk is fixed on the turntable main shaft. The detector cooperates with the code disk to detect it and feedback the real-time position signal of the turntable.

[0009] The turntable body is circular, and a plurality of mounting holes are distributed in its circumferential direction. A nut fixture is assembled on each mounting hole. The nut fixture includes a flange seat, a jaw cylinder, and a clamping sleeve. The flange seat is fixed in the groove of the mounting hole and has a flared first conical surface at the front end. The jaw cylinder is nested in the flange seat. The inner end of the jaw cylinder has an external thread structure. The outer end of the jaw cylinder is provided with a surplus slit. The outer end of the jaw cylinder is provided with a second conical surface that cooperates with the flared portion. The clamping sleeve is installed at the rear end of the jaw cylinder and is in threaded cooperation. The rear end of the clamping sleeve has a locking tooth.

[0010] Preferably, the locking teeth of the clamping sleeve are evenly distributed in the circumferential direction. The end of the locking tooth has a guiding inclined surface. A clamping groove is formed between adjacent locking teeth. One end of the clamping sleeve remains in the mounting hole.

[0011] Preferably, a surplus hole is provided at the end of the surplus slit. The jaw cylinder forms a plurality of jaw portions through the surplus slit. The thickness of the jaw portion is greater than the inner end and the rear end of the clamping sleeve.

[0012] Preferably, the processing unit includes an X-axis lead screw slide table moving module, a Y-axis lead screw slide table moving module, a moving frame, a motor, and a power head. The X-axis lead screw slide table moving module and the Y-axis lead screw slide table moving module are combined to drive the moving frame in the X-axis and Y-axis directions. The motor drives the power head to work. The motor and the power head are installed on the moving frame.

[0013] Preferably, the power head is assembled with a tool or a tool.

[0014] Preferably, a collecting slope is provided in the middle of the machine tool base. The collecting slope is located below the turntable body and inclines outward to the edge of the turntable body.

[0015] In addition, a processing method for processing a workpiece using the above multi-station composite nut processing machine tool is also provided.

[0016] Step 1, complete the clamping process at the first station: Use a manipulator to hold the workpiece and feed it into the nut fixture from the front end of the nut fixture. Rotate the clamping sleeve through a driver adapted to the clamping sleeve at the back of the nut fixture, so that the jaw cylinder tightens and fixes the workpiece.

[0017] Step 2, complete the process switching: After rotating the turntable body by an angle, the next nut fixture enters the first station, and the nut fixture in Step 1 enters the second station. Set corresponding processing stations on the nut fixtures of the turntable body. When there are n nut fixtures, set n stations in sequence. After the processes at the n stations are completed, perform the switching.

[0018] Step 3, process the workpiece: After the turntable body carries the workpiece into the corresponding station, perform the processing, including turning, milling, drilling, tapping, and grinding processes.

[0019] Step 4, complete the blanking process at the last nth station: Rotate the clamping sleeve in the reverse direction through a driver adapted to the clamping sleeve at the back of the nut fixture, so that the jaw cylinder relaxes the workpiece, and use a manipulator to hold and remove the workpiece from the front end of the nut fixture.

[0020] In addition, there is also a processing method for processing workpieces using the above multi-station composite nut processing machine tool.

[0021] Step 1, complete the clamping process at the first station: Use a manipulator to hold the workpiece and feed it into the nut fixture from the front end of the nut fixture. Rotate the clamping sleeve through a driver adapted to the clamping sleeve at the back of the nut fixture, so that the jaw cylinder tightens and fixes the workpiece.

[0022] Step 2, complete the process switching: After rotating the turntable body by an angle, the next nut fixture enters the first station, and the nut fixture in Step 1 enters the second station. Set corresponding processing stations on the nut fixtures of the turntable body. When there are n nut fixtures, set n stations in sequence. After the processes at the n stations are completed, perform the switching.

[0023] Step 3, process the workpiece: After the turntable body carries the workpiece into the corresponding station, perform the processing, including turning, milling, drilling, tapping, and grinding processes.

[0024] Step 4, complete the blanking process at the last n + 1th station, where the first station and the last station are combined at the same position: Rotate the clamping sleeve in the reverse direction through a driver adapted to the clamping sleeve at the back of the nut fixture, so that the jaw cylinder relaxes the workpiece, and use a manipulator to hold and remove the workpiece from the front end of the nut fixture.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. The present invention realizes the station switching through the turntable mechanism to achieve the process flow. There are processing units on both sides of the turntable mechanism, so that both sides of the workpiece can be processed. At the same time, the method of processing both sides can greatly improve the processing efficiency. Moreover, multiple stations are combined to rotate on the turntable mechanism, and the rotation position of the turntable main body is very accurate. The position detection and control are implemented through the coding disk and the detector, so that the station switching of the turntable main body is also very accurate. The way of clamping the workpiece by the nut fixture is simple and efficient, and its structure has no excessive counterweight structure, so the weight occupied on the turntable mechanism is very small. Compared with the existing fixture, the weight load of the turntable mechanism is greatly reduced, so it is more relaxed and reliable during the rotation of the turntable main body, and the operation of clamping the workpiece is also simple and efficient.

[0027] 2. In the present invention, although the nut fixture has no automatic driving ability, it reduces its own weight and can also be driven by an external driver, so it does not affect the operation of clamping and disassembling. Instead, it makes the switching of stations more flexible and reliable after clamping.

[0028] 3. In the present invention, according to the structure of the turntable mechanism, multiple processing stations can be arranged around it. When the workpiece enters the corresponding processing station, rapid processing can be carried out.

[0029] 4. In the present invention, in order to improve the efficiency, according to the processing operation conditions of each station, the loading and unloading are combined at the same station, so that the loading or unloading can be completed at one position.

[0030] 5. In the present invention, according to the duration requirements of the processing processes at different stations, during the processing at the station with the longest processing duration, it is only necessary to ensure that the sum of the unloading duration and the loading duration is less than the longest station duration.

[0031] Some additional advantages and beneficial effects of this application will be given in part in the following description, some will become obvious from the following description, or will be understood through the practice of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0033] Figure 1 is the overall schematic diagram of the nut processing machine tool according to the embodiment of this application;

[0034] Figure 2 is Figure 1 the top view of

[0035] Figure 3 is Figure 1 the right view of

[0036] Figure 4 is a schematic structural diagram of a turntable mechanism;

[0037] Figure 5 is Figure 4 the right view of

[0038] Figure 6 is Figure 5 the sectional view at A-A;

[0039] Figure 7 is Figure 6 the sectional view of the nut fixture after local magnification in

[0040] Explanation of the reference numerals of the main components:

[0041] 1. Machine tool base; 11. Aggregate ramp; 2. Turntable mechanism; 21. Turntable drive motor; 22. Turntable drive frame; 221. Input shaft; 23. Turntable main body; 231. Mounting hole; 24. Turntable main shaft; 25. Axle seat; 251. Bearing; 26. Coding disk; 27. Detector; 3. Processing unit; 31. X-axis lead screw slide table moving module; 32. Y-axis lead screw slide table moving module; 33. Moving frame; 34. Motor; 35. Power head; 4. Nut fixture; 41. Flange seat; 411. First conical surface; 42. Claw cylinder; 421. External thread structure; 422. Remaining margin cut; 423. Remaining margin hole; 424. Second conical surface; 43. Clamping sleeve; 431. Locking teeth; 432. Guide inclined surface; 433. Card slot. Specific embodiments

[0042] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings. The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0043] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The diagrams only show the components related to the present invention rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be changed arbitrarily, and the component layout type may also be more complex.

[0044] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, it should also be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] Embodiment 1:

[0046] Referring to Figure 1 , Figure 2 and Figure 3 shown, a multi-station composite nut processing machine tool includes a machine tool base 1. A turntable mechanism 2 is installed at the central position of the machine tool base 1. At least one processing unit 3 is arranged on each side of the turntable mechanism 2. In the specific case of this embodiment, four processing units 3 are provided, two on the left side of the turntable mechanism 2 and two on the right side of the turntable mechanism 2. During the specific processing process, it can also be processed in cooperation with a manipulator device, a gantry manipulator, etc.

[0047] In Figure 4In it, the turntable mechanism 2 includes a turntable drive 21, a turntable drive frame 22, a turntable body 23, a turntable main shaft 24, a shaft seat 25, a code disk 26, and a detector 27. The turntable drive 21 drives the input shaft 221 of the turntable drive frame 22 by means of belt drive. The turntable drive frame 22 assembles the turntable body 23 through the turntable main shaft 24 and drives the turntable body 23 to rotate. The end of the turntable main shaft 24 is installed on the shaft seat 25 through a bearing 251. The code disk 26 is fixed on the turntable main shaft 24. The detector 27 is fitted on the code disk 26 to detect it and feedback the real-time position signal of the turntable. Thus, it can be seen that the turntable drive 21 can provide power and accurately control the rotation angle of the turntable. In this embodiment, the workstations on the turntable are evenly distributed, so the control of the turntable rotation angle is also uniform. The use of the detector 27 and the code disk 26 realizes real-time position detection and feedback, thus forming a control closed-loop, which can improve the accuracy of control. The detector 27 and the code disk 26 can detect angles. There are various applications and implementation methods for the detector 27 and the code disk 26 in angle detection. The detector 27 can detect angles through different technologies. For example: Optical detector 27: The optical encoder consists of an LED light source and a photodetector 27. By detecting the light-passing and non-light-passing lines on the code disk, orthogonal pulse signals are generated to determine the rotation and speed of the shaft. Optical encoders are commonly used in scenarios such as speed measurement, distance measurement, and displacement angle measurement of the motor 34. Hall effect detector 27: The Hall encoder uses the Hall effect principle to detect magnetic field changes and generates electrical signals through a magnetic ring and a Hall device, and is commonly used in motor 34 control, position detection, and speed measurement. Magnetic detector 27: The magnetic encoder uses a magnetic code disk and a Hall effect sensor or a magnetoresistive sensor to measure the angle by detecting magnetic field changes.

[0048] The role of the code disk 26 in angle detection. The code disk 26 is a key component for the detector 27 to detect angles. The code disk 26 is usually made of plastic or glass, and light-passing and non-light-passing lines or grooves are arranged at intervals on it. When the code disk 26 rotates, the detector 27 will detect these changes and output corresponding electrical signals. For example: Optical encoder: Using an LED light source and a photodetector 27, orthogonal pulse signals are generated by detecting the light-passing and non-light-passing lines on the code disk. Hall encoder: Electrical signals are generated by detecting magnetic field changes near the Hall element.

[0049] Specific reference Figure 5 、 Figure 6 and Figure 7As shown, the turntable body 23 is circular, and a plurality of mounting holes 231 are distributed in its circumferential direction. A nut fixture 4 is assembled on each mounting hole 231. The nut fixture 4 includes a flange seat 41, a jaw cylinder 42, and a clamping sleeve 43. The flange seat 41 is fixed in the groove of the mounting hole 231 and has a flared first conical surface 411 at the front end. The jaw cylinder 42 is nested in the flange seat 41. The inner end of the jaw cylinder 42 has an external thread structure 421. A surplus slit 422 is provided at the outer end of the jaw cylinder 42. A second conical surface 424 that mates with the flare is provided at the outer end of the jaw cylinder 42. The clamping sleeve 43 is installed at the rear end of the jaw cylinder 42 and is in threaded cooperation. The rear end of the clamping sleeve 43 has a locking tooth 431.

[0050] In this way, the nut fixture 4 needs to rely on external equipment for cooperation to achieve tightening and clamping. This can reduce its counterweight on the turntable body 23 and enable two-sided machining of nut workpieces. Since the nut fixture 4 has no obstruction on both sides of the turntable body 23, a drill bit or tool can extend in.

[0051] In the further optimization process of the solution, the locking teeth 431 of the clamping sleeve 43 are evenly distributed in the circumferential direction. The end of the locking tooth 431 has a guiding inclined surface 432. A clamping groove 433 is formed between adjacent locking teeth 431. One end of the clamping sleeve 43 remains in the mounting hole 231. In this way, it is easy for an external driver to dock during the process of cooperatively driving the clamping sleeve 43, and the cooperation is more stable and reliable.

[0052] To improve the clamping reliability of the nut and the ability to return to its position by itself, a surplus hole 423 is provided at the end of the surplus slit 422. The jaw cylinder 42 forms a plurality of jaw parts through the surplus slit 422. The thickness of the jaw part is greater than the inner end and rear end of the clamping sleeve 43. This can make the jaw cylinder 42 work stably and be durable.

[0053] In Figure 1 , Figure 2 and Figure 3 it is understood that the processing unit 3 includes an X-axis lead screw slide table movement module 31, a Y-axis lead screw slide table movement module 32, a moving frame 33, a motor 34, and a power head 35. The X-axis lead screw slide table movement module 31 and the Y-axis lead screw slide table movement module 32 are combined to drive the moving frame 33 in the X-axis and Y-axis directions. The motor 34 drives the power head 35 to work. The motor 34 and the power head 35 are installed on the moving frame 33. The power head 35 is assembled with various tools or implements, and then it can move and machine nut workpieces.

[0054] To make it easier for machining debris to accumulate and be discharged, an aggregate slope 11 is provided in the middle of the machine tool base 1. The aggregate slope 11 is located below the turntable body 23 and slopes outward from the edge of the turntable body 23.

[0055] The turntable mechanism 2 realizes the switching of workstations and the flow of processes. There are processing units 3 on both sides of the turntable mechanism 2, so that both sides of the workpiece can be processed. At the same time, the method of processing both sides can greatly improve the processing efficiency. Moreover, multiple workstations are combined and rotated on the turntable mechanism 2. The rotation position of the turntable main body 23 is very precise. The position detection and control are implemented through the coding disk 26 and the detector 27, so that the switching of the workstations of the turntable main body 23 is also very precise. The nut fixture 4 clamps the workpiece in a simple and efficient manner, and its structure does not have too much weight structure, so the weight occupied on the turntable mechanism 2 is very small. Compared with the existing fixture, the weight load of the turntable mechanism 2 is greatly reduced, so it is more relaxed and reliable during the rotation of the turntable main body 23, and the operation of clamping the workpiece is also simple and efficient.

[0056] Embodiment Two:

[0057] This solution mainly provides a processing method for processing workpieces by using the above-mentioned multi-station composite nut processing machine tool.

[0058] Step 1, complete the clamping process at the first workstation: The workpiece is clamped and sent into the nut fixture 4 from the front end of the nut fixture 4 by the manipulator. The clamping sleeve 43 is rotated by a driver adapted to the clamping sleeve 43 at the back of the nut fixture 4, so that the clamping jaw cylinder 42 tightens and fixes the workpiece.

[0059] Step 2, complete the process switching: After driving the turntable main body 23 to rotate an angle, the next nut fixture 4 enters the first workstation, and the nut fixture 4 in Step 1 enters the second workstation. Corresponding processing workstations are set on the nut fixture 4 of the turntable main body 23. When there are n nut fixtures 4, n workstations are set in sequence. After the processes at the n workstations are completed, the switching is carried out.

[0060] Step 3, process processing: The turntable main body 23 carries the workpiece into the corresponding workstation for process processing, including turning, milling, tapping, and grinding processes.

[0061] Step 4, complete the blanking process at the last nth workstation: The clamping sleeve 43 is rotated in the reverse direction by a driver adapted to the clamping sleeve 43 at the back of the nut fixture 4, so that the clamping jaw cylinder 42 relaxes the workpiece, and the workpiece is clamped and taken out from the front end of the nut fixture 4 by the manipulator.

[0062] This process solution can save a large amount of processing time, especially the time for loading and unloading.

[0063] Embodiment Three:

[0064] Based on Embodiment Two, it also adopts the processing method for processing workpieces by using the above-mentioned multi-station composite nut processing machine tool.

[0065] Step 1, complete the clamping process at the first station: Use a manipulator to clamp the workpiece and send it into the nut fixture 4 from the front end of the nut fixture 4. Rotate the clamping sleeve 43 through a driver adapted to the clamping sleeve 43 at the back of the nut fixture 4, so that the jaw cylinder 42 tightens and fixes the workpiece.

[0066] Step 2, complete the process switching: After rotating the turntable body 23 by an angle, the next nut fixture 4 enters the first station, and the nut fixture 4 in Step 1 enters the second station. Set corresponding processing stations on the nut fixture 4 of the turntable body 23. When there are n nut fixtures 4, set n stations in sequence. After the processes at the n stations are completed, perform the switching.

[0067] Step 3, process the workpiece: After the turntable body 23 carries the workpiece into the corresponding station, perform the processing operations, including turning, milling, tapping, and grinding.

[0068] Step 4, complete the blanking process at the last n + 1 station. The first station and the last station are combined at the same position: Rotate the clamping sleeve 43 in the reverse direction through a driver adapted to the clamping sleeve 43 at the back of the nut fixture 4, so that the jaw cylinder 42 relaxes the workpiece, and use a manipulator to clamp and remove the workpiece from the front end of the nut fixture 4.

[0069] It can be seen that in the present invention, in order to improve the efficiency, according to the processing operation conditions of each station, the loading and unloading are combined at the same station, so that the loading or unloading can be completed at one position. According to the duration requirements of the processing processes at different stations, during the processing at a station with the longest processing duration, the sum of the blanking duration and the loading duration should be less than the longest station duration.

[0070] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-station composite nut processing machine tool, comprising a machine tool base (1), a turntable mechanism (2) is installed at the central position of the machine tool base (1), and at least one processing unit (3) is arranged on each side of the turntable mechanism (2), characterized in that, The turntable mechanism (2) includes a turntable drive machine (21), a turntable drive frame (22), a turntable main body (23), a turntable main shaft (24), a shaft seat (25), a coding disk (26), and a detector (27). The turntable drive machine (21) drives the input shaft (221) of the turntable drive frame (22) by means of belt drive. The turntable drive frame (22) assembles the turntable main body (23) through the turntable main shaft (24) and drives the turntable main body (23) to rotate. The end of the turntable main shaft (24) is installed on the shaft seat (25) through a bearing (251). The coding disk (26) is fixed on the turntable main shaft (24). The detector (27) is cooperated with the coding disk (26) to detect it and feedback the real-time position signal of the turntable. The turntable main body (23) is circular, and a plurality of mounting holes (231) are distributed in its circumferential direction. A nut fixture (4) is assembled on each mounting hole (231). The nut fixture (4) includes a flange seat (41), a jaw cylinder (42), and a clamping sleeve (43). The flange seat (41) is fixed in the groove of the mounting hole (231) and has a flared first conical surface (411) at the front end. The jaw cylinder (42) is nested in the flange seat (41). The inner end of the jaw cylinder (42) has an external thread structure (421). The outer end of the jaw cylinder (42) is provided with a surplus slit (422). The outer end of the jaw cylinder (42) is provided with a second conical surface (424) that cooperates with the flare. The clamping sleeve (43) is installed at the rear end of the jaw cylinder (42) and is in threaded cooperation. The rear end of the clamping sleeve (43) has a locking tooth (431).

2. The multi-station composite nut processing machine tool according to claim 1, characterized in that, The locking teeth (431) of the clamping sleeve (43) are evenly distributed in the circumferential direction. The end of the locking tooth (431) has a guiding inclined surface (432). A clamping groove (433) is formed between adjacent locking teeth (431). One end of the clamping sleeve (43) remains inside the mounting hole (231).

3. The multi-station composite nut processing machine tool according to claim 1, wherein, A surplus hole (423) is arranged at the end of the surplus slit (422). The jaw cylinder (42) forms a plurality of jaw parts through the surplus slit (422). The thickness of the jaw part is greater than the inner end and the rear end of the clamping sleeve (43).

4. The multi-station composite nut processing machine tool according to claim 1, characterized in that, The processing unit (3) includes an X-axis lead screw slide table moving module (31), a Y-axis lead screw slide table moving module (32), a moving frame (33), a motor (34), and a power head (35). The X-axis lead screw slide table moving module (31) and the Y-axis lead screw slide table moving module (32) are combined to drive the moving frame (33) in the X-axis and Y-axis directions. The motor (34) drives the power head (35) to work. The motor (34) and the power head (35) are installed on the moving frame (33).

5. The multi-station composite nut processing machine tool according to claim 4, characterized in that, The power head (35) is assembled with a tool or a tool.

6. The multi-station composite nut processing machine tool according to claim 1, wherein, A collecting slope (11) is arranged in the middle of the machine tool base (1). The collecting slope (11) is located below the turntable main body (23) and slopes outward toward the edge of the turntable main body (23).

7. A processing method for processing a workpiece by using a multi-station composite nut processing machine tool according to any one of claims 1-6, characterized in that Step 1, complete the clamping process at the first station: The workpiece is clamped by the manipulator and fed into the nut fixture (4) from the front end of the nut fixture (4). At the back of the nut fixture (4), the clamping sleeve (43) is rotated by a driver adapted to the clamping sleeve (43), so that the jaw cylinder (42) tightens and fixes the workpiece. Step 2, complete the process switching: After the turntable body (23) is rotated by an angle, the next nut fixture (4) enters the first station, and the nut fixture (4) in Step 1 enters the second station. Corresponding processing stations are set on the nut fixture (4) of the turntable body (23). When there are n nut fixtures (4), n stations are set in sequence. After the processes at the n stations are completed, the switching is performed. Step 3, process the workpiece: After the turntable body (23) carries the workpiece into the corresponding station, the workpiece is processed, including turning, milling, drilling, tapping, and grinding processes. Step 4, complete the unloading process at the last nth station: At the back of the nut fixture (4), the clamping sleeve (43) is rotated in the reverse direction by a driver adapted to the clamping sleeve (43), so that the jaw cylinder (42) releases the workpiece, and the workpiece is clamped and taken out from the front end of the nut fixture (4) by the manipulator.

8. A processing method for processing a workpiece by using a multi-station composite nut processing machine tool according to any one of claims 1-6, characterized in that Step 1, complete the clamping process at the first station: The workpiece is clamped by the manipulator and fed into the nut fixture (4) from the front end of the nut fixture (4). At the back of the nut fixture (4), the clamping sleeve (43) is rotated by a driver adapted to the clamping sleeve (43), so that the jaw cylinder (42) tightens and fixes the workpiece. Step 2, complete the process switching: After the turntable body (23) is rotated by an angle, the next nut fixture (4) enters the first station, and the nut fixture (4) in Step 1 enters the second station. Corresponding processing stations are set on the nut fixture (4) of the turntable body (23). When there are n nut fixtures (4), n stations are set in sequence. After the processes at the n stations are completed, the switching is performed. Step 3, process the workpiece: After the turntable body (23) carries the workpiece into the corresponding station, the workpiece is processed, including turning, milling, drilling, tapping, and grinding processes. Step 4, complete the unloading process at the last n+1th station, and the first station and the last station are combined at the same position: At the back of the nut fixture (4), the clamping sleeve (43) is rotated in the reverse direction by a driver adapted to the clamping sleeve (43), so that the jaw cylinder (42) releases the workpiece, and the workpiece is clamped and taken out from the front end of the nut fixture (4) by the manipulator.

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