A precision metal part spraying device and a working method thereof

Abstract

The application discloses a precision metal part spraying device and a working method thereof, and relates to the technical field of precision metal part production. The device is used to solve the problem that, when the existing precision metal part spraying device is used, the operation mode of spraying is fixed by clamping mechanisms at both ends, the connecting part of the clamping jaw and the metal part needs to be reprocessed after the paint dries, and in order to avoid uneven paint thickness, the part that has been sprayed with paint usually needs to be covered, which is relatively complicated. A first electric guide rail is installed in front of the upper end of the workbench, one end of the first electric guide rail is provided with a first stepping motor, and a first sliding block is installed on the first electric guide rail; a first servo motor is installed on the upper end of the first sliding block; a drying and paint spraying mechanism is installed on the output end of the first servo motor; a support frame is installed on the upper end of the bottom frame, and a rectangular frame is installed on the upper end of the support frame.

Description

Technical Field

[0001] This invention relates to the field of precision metal parts manufacturing technology, specifically to a precision metal parts spraying device and its working method. Background Technology

[0002] Precision metal parts are essential components that connect the main parts of a product. They are commonly used parts in the field of machining and require a coating process during production.

[0003] However, existing precision metal parts spraying methods use a method where the spraying is fixed at both ends to the clamping mechanism. After the spraying is completed, the connection between the clamp and the metal part needs to be touched up after the paint dries. In addition, in order to avoid uneven paint thickness, the parts that have been sprayed with paint usually need to be masked. The operation is quite cumbersome. Therefore, we provide a precision metal parts spraying device and its working method. Summary of the Invention

[0004] The purpose of this invention is to provide a precision metal parts spraying device and its working method, so as to solve the problems mentioned in the background art, that the existing precision metal parts spraying method uses two ends fixed to the clamping mechanism for spraying, and after the spraying is completed, the connection between the clamp and the metal parts needs to be touched up after the paint dries. In addition, in order to avoid uneven paint thickness, the parts that have been sprayed with paint usually need to be covered up, which is a rather cumbersome operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a precision metal parts spraying device, including a worktable, with a base frame installed on both sides of the front and rear ends of the worktable, and a support base installed below the base frame;

[0006] Also includes:

[0007] A first electric guide rail is installed in front of the upper end of the workbench. A first stepper motor is installed at one end of the first electric guide rail, and a first slider is installed on the first electric guide rail.

[0008] A first servo motor is mounted on the upper end of the first slider;

[0009] A drying and painting mechanism is installed at the output end of the first servo motor;

[0010] A support frame is installed on the upper end of the base frame. A rectangular frame is installed on the upper end of the support frame. A third electric guide rail is installed in the middle of the rectangular frame. A third stepper motor is installed at one end of the third electric guide rail. A third slider is installed on the third electric guide rail.

[0011] A hydraulic cylinder is mounted at the lower end of the third slider;

[0012] A metal clamping mechanism is mounted on the output end of the hydraulic cylinder.

[0013] Preferably, the drying and spraying mechanism includes a connecting base, a drying head, and an electrostatic spray head. The electrostatic spray head is installed at the front end of the connecting base, and the drying head is installed at the rear end of the connecting base. An air inlet is provided on the upper and lower surfaces of one end of the drying head, and an air outlet is provided at the other end of the drying head. A dust filter is installed inside both the air inlet and the air outlet. A power terminal is provided at the rear end of the connecting base. An electric heating mechanism is installed inside the drying head, and a motor is provided at the rear end of the electric heating mechanism. A fan is installed at the output end of the motor, and the outer wall of the motor is fixedly connected to the inner wall of the drying head through a bracket.

[0014] Preferably, a nozzle interface is provided at the front end above the connector, and the nozzle interface is connected to an electrostatic nozzle.

[0015] Preferably, the metal clamping mechanism includes a double-headed cylinder, a transmission block, a second servo motor, and a pneumatic chuck. The transmission block is installed on the output ends of both ends of the double-headed cylinder, the second servo motor is installed on the outer wall of the transmission block, and the pneumatic chuck is disposed on the inner wall of the transmission block. The output end of the second servo motor passes through the transmission block and is connected to the pneumatic chuck for transmission.

[0016] Preferably, both the first and third electric guide rails are equipped with ball screws inside. The output ends of the first and third stepper motors are connected to one end of the ball screws via a first coupling. The ball screws are connected to the first and third sliders in a transmission connection.

[0017] Preferably, a first bearing is installed at the connection between the other end of the ball screw and the first electric guide rail and the third electric guide rail.

[0018] Preferably, a second electric guide rail is provided between the front ends of the support base. A forward lead screw and a reverse lead screw are installed inside the second electric guide rail. One end of the forward lead screw and the reverse lead screw are fixedly connected. A second stepper motor is installed at one end of the second electric guide rail. The output end of the second stepper motor is connected to the other end of the reverse lead screw through a second coupling. A second slider is installed on both the forward lead screw and the reverse lead screw. A V-shaped bracket is installed on the upper end of the second slider.

[0019] Preferably, the other end of the forward lead screw is rotatably connected to the second electric guide rail via a second bearing.

[0020] Preferably, a bearing plate is installed at the connection between the forward lead screw and the reverse lead screw.

[0021] Preferably, a method for operating a precision metal parts spraying device includes the following steps:

[0022] Step 1: Connect the metal parts feeding conveyor and the unloading conveyor to the front and rear ends of the device, and drive the second stepper motor according to the size of the precision metal parts to rotate the forward lead screw and the reverse lead screw. Adjust the distance between the two sets of V-shaped brackets so that when the metal parts are placed on the V-shaped brackets, both ends are exposed outside the V-shaped brackets.

[0023] Step 2: The feeding conveyor drives the precision metal parts to the V-shaped bracket assembly at one end;

[0024] Step 3: The third electric guide rail drives the hydraulic cylinder and metal part clamping mechanism on the third slider to move above the V-shaped bracket. After reaching the position, the hydraulic cylinder extends, driving the metal part clamping mechanism to move down. At the same time, the two ends of the double-headed cylinder on the metal part clamping mechanism extend synchronously, unfolding the pneumatic chuck on the transmission block. When the two sets of pneumatic chucks are respectively placed at both ends of the precision metal part, the two ends of the double-headed cylinder retract synchronously, using the pneumatic chuck to clamp the two ends of the precision metal part.

[0025] Step 4: After the metal part is clamped, the hydraulic cylinder drives the metal part clamping mechanism to retract, and at the same time the third electric guide rail drives the components on the third slider to move to the rear of the drying and painting mechanism. After completion, the hydraulic cylinder extends again and adjusts the metal part on the metal part clamping mechanism to the painting height.

[0026] Step 5: Extend the left output end of the double-headed cylinder to remove the pneumatic chuck from the end of the metal part. The pneumatic chuck on the right side of the double-headed cylinder clamps the metal part. While the electrostatic spray nozzle of the drying and painting mechanism faces the metal part, the first stepper motor drives the drying and painting mechanism to move back and forth to the left along the center line of the metal part. During this process, the right pneumatic chuck rotates the metal part under the action of the second servo motor, so that the left side of the metal part can be fully sprayed. After the spraying is completed, the first servo motor drives the drying and painting mechanism to rotate, adjust the drying head to face the metal part, and move back and forth to the left along the center line of the metal part. During this process, the right pneumatic chuck rotates the metal part under the action of the second servo motor. The drying head is heated by the electric heating mechanism and continuously dries the metal part with the help of a fan. The drying temperature is 140 degrees Celsius and the holding time is 8 minutes.

[0027] Step Six: After the paint on the left side of the metal part dries, the left output end of the double-headed cylinder is reset, and the pneumatic chuck at the left end is used to re-clamp the end of the metal part. At the same time, the output end of the right side of the double-headed cylinder extends, so that the pneumatic chuck at the right end is removed from the end of the metal part. After completion, the first stepper motor drives the drying and painting mechanism to move back and forth to the right along the center line of the metal part, repeating the above painting and drying steps to complete the painting work on the right side of the metal part.

[0028] Step 7: The right output end of the double-headed cylinder is reset, and the pneumatic chuck at the right end is used to re-clamp the end of the metal part. The third electric guide rail drives the hydraulic cylinder on the third slider and the metal part clamping mechanism to move to the unloading conveyor. After completion, both ends of the double-headed cylinder extend and lower the metal part to realize automatic unloading.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. This invention, by setting up a drying and painting mechanism and a metal part clamping mechanism, allows the metal part clamping mechanism to pick up materials during production, driven by a third electric guide rail. After picking up the materials, the third electric guide rail continues to move the metal part clamping mechanism to the rear of the drying and painting mechanism. Once the metal part on the clamping mechanism reaches the painting height, the output end of the left side of the double-headed cylinder on the clamping mechanism extends, causing the pneumatic chuck on the left to retract from the end of the metal part. The pneumatic chuck on the right side of the double-headed cylinder then clamps the metal part. Simultaneously, the electrostatic spray head of the drying and painting mechanism faces the metal part, and the first stepper motor drives the drying and painting mechanism to reciprocate to the left along the centerline of the metal part. During this process, the right pneumatic chuck, under the action of the second servo motor, drives the metal part to rotate, ensuring that the left side of the metal part is fully painted. After painting is complete, the first servo motor drives the drying and painting mechanism to rotate, adjusting the drying head to face the metal part, and similarly reciprocates to the left along the centerline of the metal part. During this process, the right pneumatic chuck... The second servo motor drives the metal part to rotate. The drying head is heated by an electric heating mechanism, and the fan continuously dries the metal part. After the paint on the left side of the metal part is dry, the left output end of the double-headed cylinder resets, and the pneumatic chuck on the left end re-clamps the end of the metal part. At the same time, the right output end of the double-headed cylinder extends, causing the pneumatic chuck on the right end to retract from the end of the metal part. After completion, the first stepper motor drives the drying and painting mechanism to move back and forth to the right along the center line of the metal part, repeating the above painting and drying steps to complete the painting work on the right side of the metal part. This painting method ensures that there are no dead corners on the surface of the metal part and no need for secondary paint touch-up. It solves the problem of the existing precision metal part painting operation method, which uses two ends fixed to the clamping mechanism for painting. After the painting is completed, the connection between the clamp and the metal part needs to be touched up after the paint dries. In addition, in order to avoid uneven paint thickness, it is usually necessary to cover the painted parts, which is a cumbersome operation.

[0031] 2. By setting a second electric guide rail, a forward lead screw and a reverse lead screw are installed inside the second electric guide rail, and a second slider is installed on both the forward lead screw and the reverse lead screw. A V-shaped bracket is installed on the upper end of the second slider. When feeding, the metal parts can be sent to the V-shaped bracket by the feeding conveyor. The spacing of the V-shaped bracket can be adjusted by the forward lead screw and the reverse lead screw, so that while supporting metal parts of different sizes, both ends of the metal parts can be exposed, which is convenient for the metal parts clamping mechanism to clamp. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a partial structural diagram of the drying and spraying mechanism of the present invention;

[0034] Figure 3 This is a schematic diagram of the internal structure of the drying and spraying mechanism of the present invention;

[0035] Figure 4 This is a schematic diagram of the metal part clamping mechanism of the present invention;

[0036] Figure 5 This is a schematic diagram of the first and third electric guide rails of the present invention;

[0037] Figure 6 This is a top view of the second electric guide rail structure of the present invention;

[0038] In the diagram: 1. Workbench; 2. Base frame; 3. Support base; 4. First electric guide rail; 5. First stepper motor; 6. First slider; 7. First servo motor; 8. Drying and spraying mechanism; 801. Connecting seat; 802. Drying head; 803. Air inlet; 804. Air outlet; 805. Dust filter; 806. Power terminal; 807. Electrostatic spray head; 808. Spray head interface; 809. Electric heating mechanism; 810. Motor; 811. Bracket; 812. Fan; 9. Second electric guide rail; 901. Bearing plate; 902. 903. Forward lead screw; 904. Reverse lead screw; 905. Second coupling; 906. Second bearing; 10. Second stepper motor; 11. Second slider; 12. V-shaped bracket; 13. Support frame; 14. Rectangular frame; 15. Third electric guide rail; 16. Third stepper motor; 17. Third slider; 18. Hydraulic cylinder; 19. Metal part clamping mechanism; 191. Double-headed cylinder; 192. Transmission block; 193. Second servo motor; 194. Pneumatic chuck; 20. Ball screw; 21. First bearing; 22. First coupling. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Please see Figure 1-6 An embodiment of the present invention provides a precision metal parts spraying device, including a worktable 1, a base frame 2 installed on both sides of the front and rear ends of the worktable 1, and a support base 3 installed below the base frame 2.

[0041] Also includes:

[0042] The first electric guide rail 4 is installed at the front of the upper end of the worktable 1. A first stepper motor 5 is installed at one end of the first electric guide rail 4, and a first slider 6 is installed on the first electric guide rail 4.

[0043] The first servo motor 7 is mounted on the upper end of the first slider 6;

[0044] The drying and painting mechanism 8 is installed at the output end of the first servo motor 7;

[0045] Support frame 13 is installed on the upper end of base frame 2. A rectangular frame 14 is installed on the upper end of support frame 13. A third electric guide rail 15 is installed in the middle of the rectangular frame 14. A third stepper motor 16 is installed at one end of the third electric guide rail 15. A third slider 17 is installed on the third electric guide rail 15.

[0046] Hydraulic cylinder 18 is installed at the lower end of the third slider 17;

[0047] Metal clamping mechanism 19 is mounted on the output end of hydraulic cylinder 18.

[0048] Please see Figure 2 and Figure 3 The drying and spraying mechanism 8 includes a connecting base 801, a drying head 802, and an electrostatic spray head 807. The electrostatic spray head 807 is installed at the front end of the connecting base 801, and the drying head 802 is installed at the rear end of the connecting base 801. An air inlet 803 is provided on the upper and lower surfaces of one end of the drying head 802, and an air outlet 804 is provided at the other end of the drying head 802. A dust filter 805 is installed inside both the air inlet 803 and the air outlet 804. A power terminal 806 is provided at the rear end of the connecting base 801. An electric heating mechanism 809 is installed inside the drying head 802. A motor 810 is provided at the rear end of the electric heating mechanism 809. A fan 812 is installed at the output end of the motor 810. The outer wall of the motor 810 is fixedly connected to the inner wall of the drying head 802 through a bracket 811. The drying head 802 is heated by the internal electric heating mechanism 809, and the motor 810 drives the fan 812 to rotate, blowing hot air onto the metal parts to achieve the drying process.

[0049] Please see Figure 2 The front end of the connector 801 is provided with a nozzle interface 808, and the nozzle interface 808 is connected to the electrostatic nozzle 807. The nozzle interface 808 is connected to a pump and a spray cup. The pump sprays the paint in the spray cup onto the surface of the metal part through the electrostatic nozzle 807.

[0050] Please see Figure 4The metal part clamping mechanism 19 includes a double-headed cylinder 191, a transmission block 192, a second servo motor 193, and a pneumatic chuck 194. The transmission block 192 is installed on the output ends of both ends of the double-headed cylinder 191. The second servo motor 193 is installed on the outer wall of the transmission block 192. The pneumatic chuck 194 is set on the inner wall of the transmission block 192. The output end of the second servo motor 193 passes through the transmission block 192 and is connected to the pneumatic chuck 194. The distance between the two pneumatic chucks 194 of the double-headed cylinder 191 can be adjusted to adapt to the clamping of metal parts of different lengths.

[0051] Please see Figure 5 Both the first electric guide rail 4 and the third electric guide rail 15 are equipped with ball screws 20. The output ends of the first stepper motor 5 and the third stepper motor 16 are connected to one end of the ball screw 20 through the first coupling 22. The ball screw 20 is connected to the first slider 6 and the third slider 17 for transmission. The first electric guide rail 4 and the third electric guide rail 15 are both ball screw 20 transmission guide rails. When the ball screw 20 rotates, it can drive the first slider 6 and the third slider 17 to move along the ball screw 20.

[0052] Please see Figure 5 A first bearing 21 is installed at the connection between the other end of the ball screw 20 and the first electric guide rail 4 and the third electric guide rail 15. The first bearing 21 can improve the rotation accuracy of the ball screw 20.

[0053] Please see Figure 1 and Figure 6 A second electric guide rail 9 is provided between the front ends of the support base 3. A forward lead screw 902 and a reverse lead screw 903 are installed inside the second electric guide rail 9. One end of the forward lead screw 902 and the reverse lead screw 903 are fixedly connected. A second stepper motor 10 is installed at one end of the second electric guide rail 9. The output end of the second stepper motor 10 is connected to the other end of the reverse lead screw 903 through a second coupling 904. A second slider 11 is installed on both the forward lead screw 902 and the reverse lead screw 903. A V-shaped bracket 12 is installed on the upper end of the second slider 11 to support the metal part while exposing both ends of the metal part for easy clamping by the metal part clamping mechanism 19.

[0054] Please see Figure 6 The other end of the forward lead screw 902 is rotatably connected to the second electric guide rail 9 via the second bearing 905, which improves the rotation accuracy of the forward lead screw 902.

[0055] Please see Figure 6 A bearing plate 901 is installed at the connection between the forward lead screw 902 and the reverse lead screw 903. The bearing plate 901 makes the rotation of the forward lead screw 902 and the reverse lead screw 903 more stable.

[0056] Please see Figure 1-6 A method for operating a precision metal parts spraying device includes the following steps:

[0057] Step 1: Connect the metal parts feeding conveyor and the unloading conveyor to the front and rear ends of the device, and drive the second stepper motor 10 to run according to the size of the precision metal parts, so as to drive the forward lead screw 902 and the reverse lead screw 903 to rotate, and adjust the distance between the two sets of V-shaped brackets 12 so that when the metal parts are placed on the V-shaped brackets 12, both ends are exposed outside the V-shaped brackets 12.

[0058] Step 2: The feeding conveyor drives the precision metal parts to the V-shaped brackets 12 at one end;

[0059] Step 3: The third electric guide rail 15 drives the hydraulic cylinder 18 and the metal part clamping mechanism 19 on the third slider 17 to move above the V-shaped bracket 12. After reaching the position, the hydraulic cylinder 18 extends, driving the metal part clamping mechanism 19 to move down. At the same time, the two ends of the double-headed cylinder 191 on the metal part clamping mechanism 19 extend synchronously, unfolding the pneumatic chuck 194 on the transmission block 192. When the two sets of pneumatic chucks 194 are respectively placed at the two ends of the precision metal part, the two ends of the double-headed cylinder 191 retract synchronously, using the pneumatic chuck 194 to clamp the two ends of the precision metal part.

[0060] Step 4: After the metal part is clamped, the hydraulic cylinder 18 drives the metal part clamping mechanism 19 to retract, and at the same time the third electric guide rail 15 drives the components on the third slider 17 to move to the rear of the drying and painting mechanism 8. After completion, the hydraulic cylinder 18 extends again, and the metal part on the metal part clamping mechanism 19 is adjusted to the painting height.

[0061] Step 5: Drive the left output end of the double-headed cylinder 191 to extend, so that the pneumatic chuck 194 on the left end is removed from the end of the metal part. The pneumatic chuck 194 on the right side of the double-headed cylinder 191 clamps the metal part. At the same time, the electrostatic spray head 807 of the drying and painting mechanism 8 faces the direction of the metal part, the first stepper motor 5 drives the drying and painting mechanism 8 to move back and forth to the left along the center line of the metal part. During the process, the right pneumatic chuck 194 drives the metal part to rotate under the action of the second servo motor 193, so that the left side of the metal part can be fully sprayed. After the spraying is completed, the first servo motor 7 drives the drying and painting mechanism 8 to rotate, and adjusts the drying head 802 to face the metal part. Similarly, it moves back and forth to the left along the center line of the metal part. During the process, the right pneumatic chuck 194 drives the metal part to rotate under the action of the second servo motor 193. The drying head 802 is heated by the electric heating mechanism 809, and the fan 812 continuously dries the metal part. The drying temperature is 140 degrees Celsius, and the heat preservation time is 8 minutes.

[0062] Step Six: After the paint on the left side of the metal part dries, the left output end of the double-headed cylinder 191 is reset, and the pneumatic chuck 194 on the left end is used to re-clamp the end of the metal part. At the same time, the output end of the right side of the double-headed cylinder 191 extends, so that the pneumatic chuck 194 on the right end is removed from the end of the metal part. After completion, the first stepper motor 5 drives the drying and painting mechanism 8 to move back and forth to the right along the center line of the metal part, repeating the above painting and drying steps to complete the painting work on the right side of the metal part.

[0063] Step 7: The right output end of the double-headed cylinder 191 is reset, and the pneumatic chuck 194 on the right end is used to re-clamp the end of the metal part. The third electric guide rail 15 drives the hydraulic cylinder 18 on the third slider 17 and the metal part clamping mechanism 19 to move to the unloading conveyor. After completion, the two ends of the double-headed cylinder 191 extend and lower the metal part to realize automatic unloading.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A precision metal parts spraying device, comprising a workbench (1), wherein a base frame (2) is installed on both sides of the front and rear ends of the workbench (1), and a support base (3) is installed below the base frame (2). characterized in that Also includes: The first electric guide rail (4) is installed in front of the upper end of the worktable (1). A first stepper motor (5) is installed at one end of the first electric guide rail (4). A first slider (6) is installed on the first electric guide rail (4). The first servo motor (7) is mounted on the upper end of the first slider (6); The drying and painting mechanism (8) is installed on the output end of the first servo motor (7); A support frame (13) is installed on the upper end of the base frame (2). A rectangular frame (14) is installed on the upper end of the support frame (13). A third electric guide rail (15) is installed in the middle of the rectangular frame (14). A third stepper motor (16) is installed at one end of the third electric guide rail (15). A third slider (17) is installed on the third electric guide rail (15). A hydraulic cylinder (18) is mounted at the lower end of the third slider (17); A metal clamping mechanism (19) is mounted on the output end of the hydraulic cylinder (18); The drying and spraying mechanism (8) includes a connecting seat (801), a drying head (802), and an electrostatic spray head (807). The electrostatic spray head (807) is installed at the front end of the connecting seat (801), and the drying head (802) is installed at the rear end of the connecting seat (801). An air inlet (803) is provided on both the upper and lower surfaces of one end of the drying head (802), and an air outlet (804) is provided at the other end of the drying head (802). The air inlet (803) and the air outlet... The air vent (804) is equipped with a dust filter (805) inside. The rear end of the connecting seat (801) is provided with a power terminal (806). The drying head (802) is equipped with an electric heating mechanism (809) inside. The rear end of the electric heating mechanism (809) is provided with a motor (810). The output end of the motor (810) is equipped with a fan (812). The outer wall of the motor (810) is fixedly connected to the inner wall of the drying head (802) through a bracket (811). The front end of the connector (801) is provided with a nozzle interface (808), and the nozzle interface (808) is connected to the electrostatic nozzle (807). The metal clamping mechanism (19) includes a double-headed cylinder (191), a transmission block (192), a second servo motor (193), and a pneumatic chuck (194). The transmission block (192) is installed on the output ends of the double-headed cylinder (191). The second servo motor (193) is installed on the outer wall of the transmission block (192). The pneumatic chuck (194) is located on the inner wall of the transmission block (192). The output end of the second servo motor (193) passes through the transmission block (192) and is connected to the pneumatic chuck (194) in a transmission connection.

2. The precision metal parts spraying device according to claim 1, characterized in that: Both the first electric guide rail (4) and the third electric guide rail (15) are equipped with ball screws (20). The output ends of the first stepper motor (5) and the third stepper motor (16) are connected to one end of the ball screw (20) through the first coupling (22). The ball screw (20) is connected to the first slider (6) and the third slider (17) for transmission.

3. The precision metal parts spraying device according to claim 2, characterized in that: A first bearing (21) is installed at the connection between the other end of the ball screw (20) and the first electric guide rail (4) and the third electric guide rail (15).

4. The precision metal parts spraying device according to claim 3, characterized in that: A second electric guide rail (9) is provided between the front ends of the support base (3). A forward lead screw (902) and a reverse lead screw (903) are installed inside the second electric guide rail (9). One end of the forward lead screw (902) and the reverse lead screw (903) are fixedly connected. A second stepper motor (10) is installed at one end of the second electric guide rail (9). The output end of the second stepper motor (10) is connected to the other end of the reverse lead screw (903) through a second coupling (904). A second slider (11) is installed on both the forward lead screw (902) and the reverse lead screw (903). A V-shaped bracket (12) is installed on the upper end of the second slider (11).

5. A precision metal parts spraying device according to claim 4, characterized in that: The other end of the forward lead screw (902) is rotatably connected to the second electric guide rail (9) via the second bearing (905).

6. The precision metal parts spraying device according to claim 5, characterized in that: A bearing plate (901) is installed at the connection between the forward lead screw (902) and the reverse lead screw (903).

7. A method for operating a precision metal parts spraying device, implemented based on the precision metal parts spraying device according to claim 6, characterized in that, Includes the following steps: Step 1: Connect the metal parts feeding conveyor and the unloading conveyor to the front and rear ends of the device, and drive the second stepper motor (10) to run according to the size of the precision metal parts, drive the forward lead screw (902) and the reverse lead screw (903) to rotate, adjust the distance between the two sets of V-shaped brackets (12) so that when the metal parts are placed on the V-shaped brackets (12), both ends are exposed outside the V-shaped brackets (12); Step 2: Drive the feeding conveyor to deliver the precision metal parts to the V-shaped bracket (12) group at one end; Step 3: The third electric guide rail (15) drives the hydraulic cylinder (18) on the third slider (17) and the metal part clamping mechanism (19) to move above the V-shaped bracket (12). After reaching the position, the hydraulic cylinder (18) extends and drives the metal part clamping mechanism (19) to move down. At the same time, the two ends of the double-headed cylinder (191) on the metal part clamping mechanism (19) extend synchronously and unfold the pneumatic chuck (194) on the transmission block (192). When the two sets of pneumatic chucks (194) are placed at the two ends of the precision metal part, the two ends of the double-headed cylinder (191) retract synchronously and use the pneumatic chuck (194) to clamp the two ends of the precision metal part. Step 4: After the metal parts are clamped, the hydraulic cylinder (18) drives the metal parts clamping mechanism (19) to retract and the third electric guide rail (15) drives the components on the third slider (17) to move to the rear of the drying and painting mechanism (8). After completion, the hydraulic cylinder (18) extends again and adjusts the metal parts on the metal parts clamping mechanism (19) to the painting height. Step 5: Extend the left output end of the double-headed cylinder (191) to remove the pneumatic chuck (194) from the end of the metal part. The pneumatic chuck (194) on the right side of the double-headed cylinder (191) clamps the metal part. At the same time, the electrostatic nozzle (807) of the drying and painting mechanism (8) faces the metal part, and the first stepper motor (5) drives the drying and painting mechanism (8) to move back and forth to the left along the center line of the metal part. During the process, the right pneumatic chuck (194) drives the metal part to rotate under the action of the second servo motor (193), so that the metal part... The left side of the metal part can be fully sprayed. After the spraying is completed, the first servo motor (7) drives the drying spraying mechanism (8) to rotate. The drying head (802) is adjusted to face the metal part and moves back and forth along the center line of the metal part to the left. During the process, the right pneumatic chuck (194) drives the metal part to rotate under the action of the second servo motor (193). The drying head (802) is heated by the electric heating mechanism (809) and works with the fan (812) to continuously dry the metal part. The drying temperature is 140 degrees Celsius and the heat preservation time is 8 minutes. Step 6: After the paint on the left side of the metal part dries, the left output end of the double-headed cylinder (191) is reset, and the pneumatic chuck (194) at the left end is used to re-clamp the end of the metal part. At the same time, the output end of the right side of the double-headed cylinder (191) extends, so that the pneumatic chuck (194) at the right end is removed from the end of the metal part. After completion, the first stepper motor (5) drives the drying and painting mechanism (8) to move back and forth to the right along the center line of the metal part, repeating the above painting and drying steps to complete the painting work on the right side of the metal part. Step 7: The output end of the double-headed cylinder (191) is reset, and the pneumatic chuck (194) on the right end is used to re-clamp the end of the metal part. The third electric guide rail (15) drives the hydraulic cylinder (18) on the third slider (17) and the metal part clamping mechanism (19) to move to the unloading conveyor. After completion, the two ends of the double-headed cylinder (191) extend and lower the metal part to realize automatic unloading.

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