Automatic screw tightening and loosening device

Abstract

A novel automatic thread tightening and loosening mechanism and device are disclosed. The automatic tightening and loosening mechanism includes a mounting base plate on which a tightening motor is slidably mounted. A tightening straight insertion column is fixed on the output shaft of the tightening motor. Driven by the tightening motor, the tightening straight insertion column rotates downward and engages with a tightening screw below it. The tightening screw is inserted into a rotating hollow shaft. A rotary motor is also fixed on the mounting base plate. The output shaft of the rotary motor is connected to a drive rotary shaft via a coupling. The drive rotary shaft drives the rotating hollow shaft to rotate via a transmission device. The lower part of the rotating hollow shaft matches the shape of the top of the workpiece. This invention ensures the coaxiality of the workpiece during high-speed rotation, and provides automatic tightening and loosening functions. After the process is completed, it achieves automatic loading and unloading. This invention greatly improves the degree of automation and accuracy.

Description

Technical Field

[0001] This invention relates to an auxiliary device for automatically tightening and loosening workpieces. Background Technology

[0002] The nickel-based dicing blade for semiconductor wafer dicing adopts an electroforming nickel-based bonding process. The dicing blade has ultra-high strength and ultra-thin blade, which meets the dicing requirements of narrow blocks of semiconductor wafers. It is widely used in the processing and manufacturing of various semiconductor packaging substrates such as alumina ceramics, EMC (thermosetting resin), and PCB (printed circuit board).

[0003] Currently, the pre-plating treatment process for wafer dicing blades is done manually. This process requires the dicing blades to be immersed in degreasing, alkaline etching, acid etching, zinc plating, and cleaning tanks for extended periods. This method is labor-intensive, physically demanding, and inefficient. Furthermore, the volatile acids and alkalis in the solution tanks can have a negative impact on the production workshop and the health of employees. Summary of the Invention

[0004] The technical problem to be solved by this invention is: to design an automatic thread tightening and loosening mechanism. Due to the requirement of high-speed rotation and coaxiality, the workpiece with the wafer dicing blade is automatically tightened in the high-speed rotating shaft of the equipment, and the thread is automatically loosened after the workpiece is processed, thus completing the automatic loading and unloading.

[0005] The specific technical solution of the present invention is as follows:

[0006] A novel automatic thread tightening and loosening mechanism includes a mounting base plate on which a tightening motor is slidably mounted. A tightening straight insert column is fixed on the output shaft of the tightening motor. Driven by the tightening motor, the tightening straight insert column rotates downward and engages with a tightening screw below. The tightening screw is inserted into a rotating hollow shaft. A rotating motor is also fixed on the mounting base plate. The output shaft of the rotating motor is connected to a drive rotating shaft via a coupling. The drive rotating shaft drives the rotating hollow shaft to rotate via a transmission device. The lower part of the rotating hollow shaft matches the shape of the top of the workpiece.

[0007] The cylinder body and slide rail of the second micro cylinder are fixed on the mounting base plate. The output shaft of the second micro cylinder is connected to the motion L plate through a floating joint. The motion L plate is fixed on the slider, and the slider is slidably set on the linear slide rail. A tightening motor is fixed on the motion L plate.

[0008] The moving L-plate includes a vertical plate and a horizontal plate. A cylindrical connector connects the vertical plate of the moving L-plate, which is fixed to the slider. A tightening motor is fixed to a tightening motor mounting plate. A guide rod is connected between the horizontal plate of the moving L-plate and the tightening motor mounting plate, and a compression spring is fitted on the guide rod.

[0009] The upper and lower ends of the rotating hollow shaft are respectively provided with upper and lower steps, and tension bearing seats and fixed bearing seats are respectively provided on the upper and lower steps. The rotating hollow shaft is fixedly installed at the tension bearing seats and fixed bearing seats, and the tension bearing seats are installed on the tension seat mounting plate, and the fixed bearing seats are installed on the fixed bearing seat mounting plate; a compression spring is installed between the tightening screw and the upper step of the rotating hollow shaft.

[0010] The tightening of the straight insertion column and the tightening screw below means that: the upper end of the tightening screw is equipped with a horizontal guide rod, which divides the upper part of the tightening screw into two parts; the lower end of the tightening straight insertion column is equipped with two insertion rods, which are inserted into the two sides of the horizontal guide rod respectively.

[0011] Two automatic tightening and loosening mechanisms are installed on the mounting base plate. The two automatic tightening and loosening mechanisms share a rotary motor. At this time, a synchronous pulley is installed on each rotating hollow shaft. The tensioning mounting plate is installed on the mounting base plate and adjusts the tension of the synchronous belt.

[0012] A novel automatic thread tightening and loosening device employing the aforementioned mechanism comprises an automatic feeding mechanism, an automatic unloading mechanism, an automatic tightening and loosening mechanism, an X-axis module, a Z-axis module, a gantry frame, and a solution tank. The X-axis module is positioned transversely on the gantry frame, and the Z-axis module is positioned longitudinally on the gantry frame. The Z-axis module is fixed to the X-axis module, and the automatic tightening and loosening mechanism is fixedly mounted on the Z-axis module. Thus, the automatic tightening and loosening mechanism moves horizontally along the X-axis with the Z-axis module. The process involves: An automatic feeding mechanism and an automatic unloading mechanism are installed on both sides of the gantry frame, and a solution tank is installed at the bottom of the gantry frame; when the X-axis module moves, it drives the Z-axis module and the automatic tightening / loosening mechanism to remove the workpiece from the feeding mechanism and transport it above the solution tank. The Z-axis module then moves to lower the workpiece into the solution tank. After the process is completed, the Z-axis module moves to move the workpiece upwards. Finally, the X-axis module moves, driving the Z-axis module and the automatic tightening / loosening mechanism to send the workpiece into the automatic unloading mechanism.

[0013] The automatic feeding mechanism consists of a first clamping cylinder, a first gripper, a lifting cylinder, a mounting plate, and a mounting base. The first gripper is mounted on the output shaft of the first clamping cylinder and is used to clamp the workpiece. The cylinder body of the first clamping cylinder is connected to the movable plate of the lifting cylinder through an L-plate. The lifting cylinder can drive the first clamping cylinder and the workpiece to be lifted simultaneously. The cylinder body of the lifting cylinder is fixed on the mounting plate, and the mounting plate is fixed on the mounting base. The mounting base is provided with a positioning groove in which the workpiece is placed.

[0014] The automatic feeding mechanism consists of a first micro cylinder, a second gripper, a second clamping cylinder, a sliding base plate, a fixed base plate, a linear guide rail, and a slider. The cylinder body of the first micro cylinder is fixed to the fixed base plate, the sliding base plate is fixed to the output rod of the first micro cylinder, the cylinder body of the second clamping cylinder is fixedly mounted on the sliding base plate, and a second gripper is fixed to the output shaft of the second clamping cylinder. Additionally, a linear guide rail is provided on the fixed base plate, and a slider is slidably mounted on the linear guide rail, with the slider fixedly connected to the sliding base plate.

[0015] The beneficial effects of this invention are as follows: This invention provides an automatic tightening and loosening mechanism that ensures the coaxiality of the workpiece during high-speed rotation, and has automatic tightening and loosening functions, and achieves automatic loading and unloading after the process is completed. This invention greatly improves the degree of automation and accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the automatic feeding mechanism;

[0018] Figure 3 This is a schematic diagram of the automatic feeding mechanism;

[0019] Figure 4 This is a schematic diagram of the automatic tightening mechanism. 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] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figure 1As shown, a novel automatic thread tightening and loosening device comprises an automatic feeding mechanism 1, an automatic unloading mechanism 2, an automatic tightening and loosening mechanism 3, an X-axis module 4, a Z-axis module 5, a gantry frame 6, and a solution tank 7. The X-axis module 4 is arranged laterally on the gantry frame 6, and the Z-axis module 5 is arranged longitudinally on the gantry frame 6. The Z-axis module 5 is fixed to the X-axis module 4, and the automatic tightening and loosening mechanism 3 is fixedly mounted on the Z-axis module 5. Thus, the automatic tightening and loosening mechanism 3 moves along the X-axis with the Z-axis module 5. The automatic tightening and loosening mechanism 3 includes a tightening motor 303, which is driven by a tightening screw 309. The tightening screw 309 is connected to the top of the workpiece, allowing the workpiece to be tightened onto the automatic tightening and loosening mechanism 3. Furthermore, the automatic feeding mechanism 1 and the automatic unloading mechanism 2 are respectively arranged on both sides of the gantry frame 6, and the solution tank 7 is located at the bottom of the gantry frame 6. Thus, when the X-axis module 4 moves, it drives the Z-axis module 5 and the automatic tightening and loosening mechanism 3 to take the workpiece out of the automatic feeding mechanism 1 and transport it above the solution tank 7. The Z-axis module 5 moves to lower the workpiece into the solution tank 7. After the process is completed, the Z-axis module 5 moves to move the workpiece up. Finally, the X-axis module 4 moves, driving the Z-axis module 5 and the automatic tightening and loosening mechanism 3 to send the workpiece into the automatic unloading mechanism 2.

[0023] It should be noted that the X-axis module 4 and Z-axis module 5 here are the X-axis translation device and the Z-axis translation device, respectively. These are existing technologies and will not be described in detail here.

[0024] like Figure 2 As shown, the automatic feeding mechanism 1 consists of a first clamping cylinder 101, a first gripper 102, a lifting cylinder 103, a mounting plate 104, and a mounting base 105. The first gripper 102 is mounted on the output shaft of the first clamping cylinder 101 and is used to clamp the workpiece. The cylinder body of the first clamping cylinder 101 is connected to the movable plate of the lifting cylinder 103 through an L-plate. The lifting cylinder 103 can drive the first clamping cylinder and the workpiece to be lifted simultaneously. The cylinder body of the lifting cylinder 103 is fixed on the mounting plate 104, and the mounting plate 104 is fixed on the mounting base 105. The mounting base 105 is provided with a positioning groove, in which the workpiece is placed.

[0025] like Figure 3As shown, the automatic unloading mechanism 2 consists of a first micro cylinder 201, a second gripper 202, a second clamping cylinder 203, a sliding base plate 204, a fixed base plate 205, a linear guide rail, and a slider 206. The cylinder body of the first micro cylinder 201 is fixed to the fixed base plate 205. The sliding base plate 204 is fixed to the output rod of the first micro cylinder 201. The cylinder body of the second clamping cylinder 203 is fixedly mounted on the sliding base plate 204, and the second gripper 202 is fixed to the output shaft of the second clamping cylinder 203. Additionally, a linear guide rail is provided on the fixed base plate 205, and a slider is slidably mounted on the linear guide rail, with the slider fixedly connected to the sliding base plate 204. Thus, when the output rod of the first micro cylinder 201 moves, it causes the sliding base plate 204 to slide on the linear guide rail, simultaneously causing the second clamping cylinder 203 to move. The movement of the second clamping cylinder 203 then causes the second gripper 202 to perform a gripping action.

[0026] like Figure 4 As shown, the automatic tightening and loosening mechanism 3 consists of a mounting base plate 301, a second micro cylinder 302, a tightening motor 303, a linear slide rail 304, a moving L-plate 305, a compression spring 306, a tightening motor mounting plate 307, a tightening straight insertion column 308, a tightening screw 309, a compression spring 310, a synchronous pulley 311, a tension bearing seat 312, a tension bearing seat mounting plate 313, a rotating hollow shaft 314, a rotating motor 315, a coupling 316, an active rotating shaft 317, a tension mounting plate 318, and a fixed bearing seat mounting plate 319.

[0027] The cylinder body and slide rail of the second micro cylinder 302 are fixed on the mounting base plate 301. The output shaft of the second micro cylinder 302 is connected to the moving L plate 305 through a floating joint. The moving L plate 305 is fixed on the slider, and the slider is slidably set on the linear slide rail 304. A tightening motor 303 is fixed on the moving L plate 305. In this way, the output shaft of the second micro cylinder 302 extends / retracts, driving the floating joint to move up and down, thereby driving the moving L plate 305 to move up and down, and finally driving the tightening motor 303 to move up and down.

[0028] It should be noted that the floating joint is a cylindrical connector. The moving L-plate 305 includes a vertical plate and a horizontal plate. The cylindrical connector is connected to the vertical plate of the moving L-plate 305, and the vertical plate of the moving L-plate 305 is fixed on the slider.

[0029] Furthermore, the tightening motor 303 is fixed on the tightening motor mounting plate 307. A guide rod is placed between the horizontal plate of the moving L plate 305 and the tightening motor mounting plate 307, and a compression spring 306 is sleeved on the guide rod. In this way, when the tightening motor 303 is pressed down, the horizontal plate of the moving L plate 305 presses down on the compression spring 306, thus providing a certain buffer for the tightening motor 303 during the pressing down.

[0030] A tightening straight insert post 308 is fixed on the output shaft of the tightening motor 303. Driven by the tightening motor 303, the tightening straight insert post 308 rotates downwards and engages with the tightening screw 309 below. The tightening screw 309 is inserted into the rotating hollow shaft 314. The upper and lower ends of the rotating hollow shaft 314 are respectively provided with upper and lower steps. A tension bearing seat 312 and a fixed bearing seat are respectively provided on the upper and lower steps. In this way, the rotating hollow shaft 314 is fixedly set at the tension bearing seat 312 and the fixed bearing seat. The tension bearing seat 312 is mounted on the tension seat mounting plate 313, and the fixed bearing seat is mounted on the fixed bearing seat mounting plate 319. In addition, a compression spring 310 is installed between the tightening screw 309 and the upper step of the rotating hollow shaft 314 to facilitate buffering the tightening operation.

[0031] The engagement of the tightening insert post 308 with the tightening screw 309 below means that the upper end of the tightening screw 309 is equipped with a transverse guide rod, which divides the upper part of the tightening screw 309 into two parts. The lower end of the tightening insert post 308 has two insert rods, which are inserted into both sides of the transverse guide rod. Thus, when the output shaft of the tightening motor 303 rotates, it drives the tightening screw 309 to rotate together via the tightening insert post 308. This facilitates the engagement of the external thread at the bottom of the tightening screw 309 with the internal thread inside the workpiece cone.

[0032] A rotary motor 315 is also fixed on the mounting base plate 301. The rotary motor 315 is mounted on the mounting base plate 301 via an L-plate. The output shaft of the rotary motor 315 is connected to the drive rotary shaft 317 via a coupling 316. The drive rotary shaft 317 drives the rotary hollow shaft 314 to rotate via a transmission device, thereby providing rotational power to the rotary hollow shaft 314. A tapered hole is provided at the bottom of the rotary hollow shaft 314, and the tapered hole matches the shape of the top of the workpiece.

[0033] Furthermore, two sets of automatic tightening and loosening mechanisms 3 are provided on the mounting base plate 301. The two sets of automatic tightening and loosening mechanisms 3 share a single rotary motor 315. At this time, a synchronous pulley 311 is installed on each rotating hollow shaft 314. The synchronous pulleys 311 are driven by a synchronous belt, which ensures that the two sets of automatic tightening and loosening mechanisms 3 rotate synchronously. In addition, a tensioning mounting plate 318 is installed on the mounting base plate 301. The tensioning of the bearing seat mounting plate 313 is achieved by two screws, thereby adjusting the tension of the synchronous belt.

[0034] The working process of this invention is as follows:

[0035] The automatic thread tightening and loosening mechanism of this invention realizes the automatic tightening and unloading of workpieces, ensuring the coaxiality of the workpieces after loading, and thus the stability during high-speed rotation. It replaces the workers and automates the electroplating pretreatment process, thereby achieving the goal of reducing manpower and increasing efficiency.

[0036] 1. Adjust the operating speed and force of each cylinder through the throttle valve to achieve optimal movement. Adjust the position and movement speed of the X-axis and Z-axis modules to ensure the position of the material pick-up point, solution processing point, and unloading point, as well as the overall movement cycle.

[0037] 2. The employee places two workpieces in the positioning slots of the mounting base 105. The first clamping cylinder 101 clamps the workpieces, and the lifting cylinder 103 lifts them to wait for the module to reach the material picking point to pick up the material.

[0038] 3. The X-axis module 4 moves, causing the Z-axis module 5 and the automatic tightening / loosening mechanism 3 to translate, so that the tapered hole below the rotating hollow shaft 314 is aligned with the top of the workpiece. Then, the Z-axis module 5 presses down, causing the cone on top of the workpiece to enter the tapered hole below the rotating hollow shaft 314. The tightening motors 303 on both sides of the automatic tightening / loosening mechanism 3 rotate clockwise simultaneously, and then the second micro cylinder 302 presses down simultaneously, causing the tightening straight insert post 308 to insert into the upper end of the tightening screw 309. The compression spring 306 and the clamping spring 310 act as buffers at the top and bottom to prevent hard contact. The upper end of the tightening screw 309 is equipped with a transverse guide rod, so the tightening motor 303 drives the tightening screw 309 to rotate, thereby screwing the external thread at the bottom of the tightening screw 309 into the internal thread inside the cone of the workpiece. The optimal tightening effect is achieved by controlling the number of pulses and current sent by the driver to the stepper motor, thereby controlling the number of rotations and tightening force of the motor. After the thread is screwed in, the second micro cylinder 302 is lifted, causing the tightening straight insert post 308 to disengage from the upper end of the tightening screw 309, cutting off the tightening power. At this point, the workpiece is automatically fed, and the workpiece is fixed relative to the rotating hollow shaft 314.

[0039] 4. The X-axis module 4 and Z-axis module 5 move the workpiece to the solution treatment position. After being immersed in the solution, the Z-axis module 5 is raised so that the bottom surface of the workpiece is higher than the top surface of the solution. Then, the rotary motor 315 rotates at high speed, which drives the two rotating hollow shafts 314 to rotate through the synchronization mechanism, thereby driving the two workpieces to rotate at high speed, so that the residual solution on the wafer blade is thrown out and falls back into the solution tank 7, achieving the purpose of waste liquid recycling.

[0040] 5. After the workpiece has undergone a series of soaking and cleaning processes in the solution tank 7, it undergoes an automatic unloading process. The module moves the workpiece to the unloading position, and the first micro cylinder 201 actuates, causing the sliding base plate 204 to move forward, bringing the second gripper 202 to the picking point. The second clamping cylinder 203 actuates to clamp the workpiece, and the Z-axis module 5 presses down, causing the cone on top of the workpiece to enter the conical hole below the rotating hollow shaft 314. Simultaneously, the tightening motors on both sides of the automatic tightening and loosening mechanism 3 rotate counterclockwise, and the second micro cylinder 302 presses down, causing the tightening straight insert post 308 to insert into the upper end of the tightening screw 309, loosening the external thread at the bottom of the tightening screw 309 from the internal thread inside the cone on the workpiece. The second clamping cylinder 203 actuates to release the workpiece, the first micro cylinder 201 retracts, and the Z-axis module 5 actuates to raise the automatic tightening and loosening mechanism 3. At this point, one process is completed, and the workpiece awaits employee pickup.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A threaded automatic tightening and loosening device, characterized in that: It consists of an automatic feeding mechanism (1), an automatic unloading mechanism (2), an automatic tightening and loosening mechanism (3), an X-axis module (4), a Z-axis module (5), a gantry (6), and a solution tank (7); wherein, the X-axis module (4) is set in the transverse direction of the gantry (6), and the Z-axis module (5) is set in the longitudinal direction of the gantry (6), wherein the Z-axis module (5) is fixed on the X-axis module (4), and the automatic tightening and loosening mechanism (3) is fixed on the Z-axis module (5), so that the automatic tightening and loosening mechanism (3) moves with the Z-axis module (5) in the X-axis direction; on both sides of the gantry (6) An automatic feeding mechanism (1) and an automatic unloading mechanism (2) are set up respectively, and a solution tank (7) is set at the bottom of the gantry frame (6). When the X-axis module (4) moves, it drives the Z-axis module (5) and the automatic tightening and loosening mechanism (3) to take the workpiece out from the automatic feeding mechanism (1) and transport it to the top of the solution tank (7). The Z-axis module (5) moves and lowers the workpiece into the solution tank (7). After the process is completed, the Z-axis module (5) moves and moves the workpiece up. Finally, the X-axis module (4) moves and drives the Z-axis module (5) and the automatic tightening and loosening mechanism (3) to send the workpiece into the automatic unloading mechanism (2). The automatic tightening and loosening mechanism (3) includes a mounting base plate (301), on which a tightening motor (303) is slidably mounted. A tightening straight insert column (308) is fixed on the output shaft of the tightening motor (303). Driven by the tightening motor (303), the tightening straight insert column (308) rotates downward and engages with the tightening screw (309) below. The tightening screw (309) is inserted into the rotating hollow shaft (314). A rotating motor (315) is also fixed on the mounting base plate (301). The output shaft of the rotating motor (315) is connected to the active rotating shaft (317) through a coupling (316). The active rotating shaft (317) drives the rotating hollow shaft (314) to rotate through a transmission device. The lower part of the rotating hollow shaft (314) matches the shape of the top of the workpiece.

2. The automatic thread tightening and loosening device according to claim 1, characterized in that: The cylinder body and slide rail of the second micro cylinder (302) are fixed on the mounting base plate (301). The output shaft of the second micro cylinder (302) is connected to the motion L plate (305) through a floating joint. The motion L plate (305) is fixed on the slider, and the slider is slidably set on the linear slide rail (304). A tightening motor (303) is fixed on the motion L plate (305).

3. The automatic thread tightening and loosening device according to claim 2, characterized in that: The motion L-plate (305) includes a vertical plate and a horizontal plate. A cylindrical connector is connected to the vertical plate of the motion L-plate (305), and the vertical plate of the motion L-plate (305) is fixed on the slider. The tightening motor (303) is fixed on the tightening motor mounting plate (307). A guide rod is provided between the horizontal plate of the motion L-plate (305) and the tightening motor mounting plate (307), and a compression spring (306) is sleeved on the guide rod.

4. The automatic thread tightening and loosening device according to claim 1, characterized in that: The upper and lower ends of the rotating hollow shaft (314) are respectively provided with upper and lower steps. The upper and lower steps are respectively provided with tension bearing seat (312) and fixed bearing seat. The rotating hollow shaft (314) is fixedly installed at the tension bearing seat (312) and the fixed bearing seat. The tension bearing seat (312) is installed on the tension seat mounting plate (313), and the fixed bearing seat is installed on the fixed bearing seat mounting plate (319). A compression spring (310) is installed between the tightening screw (309) and the upper step of the rotating hollow shaft (314).

5. The automatic thread tightening and loosening device according to claim 1, characterized in that: The tightening of the straight insertion post (308) and the tightening screw (309) below means that: the upper end of the tightening screw (309) is equipped with a horizontal guide rod, which divides the upper end of the tightening screw (309) into two parts, and the lower end of the tightening straight insertion post (308) is provided with two insert rods, which are inserted into the two sides of the horizontal guide rod respectively.

6. The automatic thread tightening and loosening device according to claim 1, characterized in that: Two automatic tightening and loosening mechanisms (3) are provided on the mounting base plate (301). The two automatic tightening and loosening mechanisms (3) share a rotary motor (315). At this time, a synchronous pulley (311) is installed on each rotating hollow shaft (314). The tensioning mounting plate (318) is installed on the mounting base plate (301) and the tensioning mounting plate (318) adjusts the tension of the synchronous belt.

7. The automatic thread tightening and loosening device according to claim 1, characterized in that: The automatic feeding mechanism (1) consists of a first clamping cylinder (101), a first gripper (102), a lifting cylinder (103), a mounting plate (104), and a mounting base (105). The first gripper (102) is mounted on the output shaft of the first clamping cylinder (101) and is used to clamp the workpiece. The cylinder body of the first clamping cylinder (101) is connected to the movable plate of the lifting cylinder (103) through an L-plate. The lifting cylinder (103) can drive the first clamping cylinder and the workpiece to be lifted at the same time. The cylinder body of the lifting cylinder (103) is fixed on the mounting plate (104), and the mounting plate (104) is fixed on the mounting base (105). The mounting base (105) is provided with a positioning groove, in which the workpiece is placed.

8. The automatic thread tightening and loosening device according to claim 1, characterized in that: The automatic feeding mechanism (2) consists of a first micro cylinder (201), a second gripper (202), a second clamping cylinder (203), a sliding base plate (204), a fixed base plate (205), a linear guide rail, and a slider (206). The cylinder body of the first micro cylinder (201) is fixed on the fixed base plate (205), the sliding base plate (204) is fixed on the output rod of the first micro cylinder (201), the cylinder body of the second clamping cylinder (203) is fixedly installed on the sliding base plate (204), and the second gripper (202) is fixed on the output shaft of the second clamping cylinder (203). In addition, a linear guide rail is provided on the fixed base plate (205), and a slider is slidably provided on the linear guide rail. The slider is fixedly connected to the sliding base plate (204).

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