A method and apparatus for producing a diamond-like film

Abstract

The application relates to the technical field of diamond-like film preparation, and particularly discloses a diamond-like film preparation method and equipment, which comprises a machine box, a machine shell, a rotating table, a support and a workpiece. The machine shell is arranged on the top of the machine box, the lower end of the machine shell is movably connected with the rotating table, the top of the rotating table is movably connected with the support, and the outside of the support is sleeved with the workpiece. A supporting mechanism is arranged at the bottom of the workpiece. The supporting mechanism comprises a fixed disc one fixed to the outer wall of the rotating table, the top of the fixed disc one is provided with a supporting leg one for supporting the workpiece, and the bottom of the workpiece is provided with a supporting leg two for alternately supporting the workpiece. The alternately supporting of the supporting leg one and the supporting leg two is favorable for exposing the shielding part, so that the overall coating of the outer surface of the workpiece can be realized, the phenomenon of incomplete coating caused by the shielding of the supporting leg one is avoided, manual adjustment of the workpiece is not needed, the time for manual adjustment is saved, and the automation degree of the equipment is higher.

Description

Technical Field

[0001] This invention relates to the field of diamond-like carbon (DLC) film preparation technology, specifically to a method and apparatus for preparing DLC ​​films. Background Technology

[0002] Diamond-like carbon (DLC) films combine the excellent properties of diamond and graphite. As a friction-reducing and wear-resistant coating, they are used in many fields such as aerospace, metal processing, and medical devices. They are deposited on the surface of workpieces to form a coating and achieve surface modification of parts. The coating equipment includes a vacuum coating chamber, a sputtering target, a rotating table on the base of the vacuum coating chamber and a workpiece rack on the rotating table, as well as a first rotation system that drives the rotating table to rotate around the central axis of the rotating table, a temperature control system, a heating device, a cooling water circulation system and a power control system.

[0003] In the coating process, the workpiece to be coated is placed on a workpiece holder inside the vacuum coating chamber. The workpiece holder rotates, and the material is evaporated or sputtered into gas or ions through heating or sputtering. The gas or ions are then deposited onto the sample surface to form a thin film. When coating large workpieces such as flanges, it is necessary to coat the entire outer surface of the flange. The flange is supported by legs on the workpiece holder. However, the area where the flange contacts the legs is blocked by the legs. In this case, it is difficult for gas and ions to deposit on the surface of the blocked area, resulting in incomplete coating on the outer surface of the flange. If the machine casing is opened and the position of the flange and legs is manually adjusted to expose the uncoated areas, it is time-consuming. Therefore, we propose a method and equipment for preparing diamond-like carbon (DLC) films. Summary of the Invention

[0004] The purpose of this invention is to provide a method and apparatus for preparing diamond-like carbon films, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method and apparatus for preparing a diamond-like carbon film, comprising: a chassis, a housing, a rotating platform, a support, and a workpiece.

[0006] The top of the chassis is equipped with a housing, and the lower end of the housing is movably connected to a rotating platform. The top of the rotating platform is movably connected to a support, and the support is fitted with a workpiece.

[0007] The support mechanism is located at the bottom of the workpiece. The support mechanism includes a fixed plate 1 fixed to the outer wall of the rotating frame, and a support leg 1 for supporting the workpiece is provided on the top of the fixed plate 1, and a support leg 2 for alternately supporting the workpiece is provided at the bottom of the workpiece.

[0008] The power mechanism is indirectly connected to support leg one and support leg two respectively, realizing the vertical movement of support leg one and support leg two. The alternating vertical movement of support leg one and support leg two realizes the alternating support of the workpiece.

[0009] Preferably, a connecting frame is fixed to the bottom of the support leg, and the end of the connecting frame away from the support leg is fixed to the outer wall of the outer ring, and support rods are evenly fixed to the bottom of the outer ring.

[0010] Preferably, the support rod is inserted inside the fixed plate, and the fixed plate has a limiting hole that matches the support rod. The bottom of the support rod is fixed to the surface of the outer ring.

[0011] Preferably, the bottom of the second support leg is fixed to the surface of the second connecting frame, and the bottom of the second connecting frame is fixed to the surface of the first inner ring, with the second support rod evenly fixed to the bottom of the first inner ring.

[0012] Preferably, the second support rod is inserted inside the first fixed plate, and the first fixed plate has a second limiting hole that cooperates with the second support rod. The bottom of the second support rod is fixed to the surface of the second inner ring.

[0013] Preferably, a fixed plate 2 is fixed in the middle of the outer wall of the rotating platform, and a bidirectional motor 1 and a bidirectional motor 2 are fixed inside the fixed plate 2. A screw 1 is provided on each of the two output shafts of the bidirectional motor 1. The top of the screw 1 is movably connected to the fixed plate 1, and the screw 1 is threadedly connected to the outer ring 2.

[0014] Preferably, the two output shafts of the bidirectional motor are respectively provided with screws, the top of the screws are movably connected to the fixed plate, and the screws are threadedly connected to the inner ring.

[0015] Preferably, a fixing block is fixed to the bottom of the fixing plate 2, and the fixing block is inserted into the interior of the rotating frame. A bolt 1 is inserted into the interior of the fixing block, and the side of the bolt 1 away from the fixing block is threadedly connected to the rotating frame. The output shaft at the top of the bidirectional motor 1 is fixedly connected to the screw 1. The output shaft at the bottom of the bidirectional motor 1 is connected to the screw 1 through bolt 2. The output shaft at the top of the bidirectional motor 2 is fixedly connected to the screw 2. The output shaft at the bottom of the bidirectional motor 2 is connected to the screw 2 through bolt 3.

[0016] Preferably, a sliding clamp is mounted on the top of both the second and first legs, and the bottom of the sliding clamp is slidably connected to the second and first legs respectively via a slider. A screw three is movably connected to the side wall of the sliding clamp, and the screw three is threadedly connected to the second and first legs respectively. A handle is fixed to the end of the screw three away from the sliding clamp.

[0017] Preferably, step one: open the machine casing, put the workpieces on the outer wall of the bracket respectively, so that the workpieces are supported on the top of the support leg one, and use bolt one, bolt two and bolt three to splice, assemble and fix the bracket. After the bracket is assembled, close the machine casing.

[0018] Step 2: Connect an external power source to provide power for the operation of the device. Control the rotating platform to start rotating through the control panel. At the same time, control the support to start rotating. The rotation of the support drives the workpiece mounted on the top of the support leg to rotate synchronously.

[0019] Step 3: After the support indirectly drives the workpiece to rotate 360 ​​degrees, the signal is transmitted to the controller. The controller controls the bidirectional motor 2 to start working. The bidirectional motor 2 drives the screw 2 to rotate synchronously. When the screw 2 rotates, the inner ring 2 moves upward. The inner ring 2 drives the support leg 2 to move upward synchronously through the support rod 2, the inner ring 1, and the connecting frame 2. The bottom of the fixed plate 1 is equipped with a control switch corresponding to the inner ring 2. When the inner ring 2 moves upward, the inner ring 2 presses against the control switch. When the control switch is pressed, the signal is transmitted to the controller. The controller controls the screw 2 to stop rotating, so that the movement of the inner ring 2 stops, thereby stopping the movement of the support leg 2. The upward movement of the support leg 2 allows the surface of the support leg 2 to support the bottom of the workpiece. At the same time, the controller controls the output shaft of the bidirectional motor 1 to rotate, so that the screw 1 rotates. The rotation of the screw 1 causes the outer ring 2 to move downward. The outer ring 2 drives the support leg 1 to move downward synchronously through the support rod 1, the outer ring 1, and the connecting frame 1, so that the support leg 1 releases the support of the workpiece. At this time, the position where the support leg 1 contacts the workpiece is exposed, which is beneficial for coating.

[0020] Step 4: The support continues to rotate. After the support rotates the workpiece another 360 degrees, the coating of the part covered by the first support leg is completed. At this time, the controller controls the bidirectional motor one to work, causing the output shaft of the bidirectional motor one to reverse, thereby driving the screw one to rotate in the opposite direction. The reverse rotation of the screw one causes the outer ring two to move upward, indirectly realizing the upward movement of the first support leg. The upward movement of the first support leg provides support for the workpiece. Subsequently, the controller controls the bidirectional motor two to work, causing the screw two to rotate in the opposite direction. The reverse rotation of the screw two causes the inner ring two to move downward, indirectly realizing the downward movement of the second support leg. This releases the support of the second support leg on the workpiece, restoring the initial position of the first support leg. This ensures the complete operation of the overall control system of the equipment and results in a better coating effect.

[0021] This invention has at least the following beneficial effects:

[0022] The workpiece is initially supported by three sets of legs. After the support rotates and the workpiece surface is coated once, the second leg rises to support the workpiece, while the first leg falls, exposing the parts of the workpiece surface that were previously covered by the first leg. The support continues to rotate, allowing the coating on the previously covered parts of the workpiece surface to continue. Through this design, with the second leg ensuring stable support for the workpiece, the first leg moves down, exposing the parts previously covered by the first leg, facilitating coating on those parts. The alternating support of the first and second legs facilitates the alternating exposure of the parts covered by the first and second legs, thus achieving comprehensive coating on the outer surface of the workpiece. This avoids incomplete coating due to the first leg covering the workpiece. It eliminates the need to open the machine casing and manually adjust the position of the workpiece to expose the covered parts, saving manual adjustment time and increasing the automation level of the equipment. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a three-dimensional cross-sectional view of the structure of the present invention;

[0025] Figure 3 This is a partial three-dimensional structural schematic diagram of the rotating platform and support mechanism of the present invention;

[0026] Figure 4 This is a partial three-dimensional structural schematic diagram of the workpiece and support leg one of the present invention;

[0027] Figure 5 This is a partial three-dimensional structural schematic diagram of the first and second supports of the present invention;

[0028] Figure 6 This is a partial structural schematic diagram of the workpiece and support mechanism of the present invention;

[0029] Figure 7 This is a partial structural schematic diagram of the bidirectional motor one and bidirectional motor two of the present invention;

[0030] Figure 8 This is a partial structural schematic diagram of the second support leg of the present invention;

[0031] Figure 9 This is a partial structural schematic diagram of unidirectional motor one and unidirectional motor two according to Embodiment 2 of the present invention;

[0032] Figure 10 This is a partial structural diagram of the second support leg and the sliding clamp in Embodiment 3 of the present invention.

[0033] In the diagram: 1-Chassis; 21-House; 22-Turntable; 23-Bracket; 24-Workpiece; 31-Fixed Plate 1; 32-Feet 1; 33-Connecting Frame 1; 34-Outer Ring 1; 35-Support Rod 1; 36-Limiting Hole 1; 37-Inner Ring 1; 38-Connecting Frame 2; 39-Feet 2; 41-Support Rod 2; 42-Limiting Hole 2; 43-Outer Ring 2; 44-Inner Ring 2; 45-Fixed Plate 2; 46-Bidirectional Motor 1; 47-Screw 1; 48-Bidirectional Motor 2; 49-Screw 2; 51-Fixed Block; 52-Bolt 1; 53-Bolt 2; 54-Bolt 3; 55-Control Switch; 56-Unidirectional Motor 1; 57-Unidirectional Motor 2; 61-Sliding Clamp; 62-Slider; 63-Screw 3; 64-Handle. Detailed Implementation

[0034] 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.

[0035] Please see Figure 1-8 The present invention provides a technical solution: Example 1, a method and apparatus for preparing a diamond-like carbon film, comprising:

[0036] The system comprises a chassis 1, a housing 21, a rotating platform 22, a support 23, and a workpiece 24. The housing 21 is mounted on the top of the chassis 1, and the rotating platform 22 is movably connected to the lower end of the housing 21. The support 23 is movably connected to the top of the rotating platform 22, and the workpiece 24 is fitted onto the outside of the support 23. A support mechanism is located at the bottom of the workpiece 24. The support mechanism includes a fixed plate 31 fixed to the outer wall of the rotating platform 22, and the top of the fixed plate 31 is provided with support legs 32 for supporting the workpiece 24. The bottom of the workpiece 24 is provided with alternate supports for supporting the workpiece 24. The support leg 29 is connected to the power mechanism, which is indirectly connected to the support leg 1 32 and the support leg 2 39 respectively, so as to realize the vertical movement of the support leg 1 32 and the support leg 2 39. The workpiece 24 is alternately supported by the staggered vertical movement of the support leg 1 32 and the support leg 2 39. The workpiece 24 is initially supported by the three sets of support legs 1 32. After the support 23 rotates one revolution, the workpiece 24 is supported by the three sets of support legs 2 39. The support legs 1 32 move down, so that the part of the workpiece 24 that was covered by the support legs 1 32 is exposed, which is beneficial to the coating operation inside the housing 21.

[0037] A connecting frame 33 is fixed to the bottom of the support leg 32, and the end of the connecting frame 33 away from the support leg 32 is fixed to the outer wall of the outer ring 34. Support rods 35 are evenly fixed to the bottom of the outer ring 34. The support rods 35 are inserted into the inside of the fixed plate 31. The fixed plate 31 has a limiting hole 36 that cooperates with the support rod 35. The bottom of the support rods 35 is fixed to the surface of the outer ring 43. The support leg 32 is designed to move vertically, so that after the support leg 32 has pre-supported the workpiece 24, it can be withdrawn downward, so that the part of the workpiece 24 that was covered by the support leg 32 is exposed, which is beneficial for the coating of the covered part. Through the design of the support rod 35 and the limiting hole 36, the vertical movement of the support rod 35 is limited, thereby indirectly limiting the vertical movement of the support leg 32, making the vertical movement of the support leg 32 more stable.

[0038] The bottom of the second support leg 39 is fixed to the surface of the second connecting frame 38, and the bottom of the second connecting frame 38 is fixed to the surface of the first inner ring 37. The bottom of the first inner ring 37 is evenly fixed with the second support rod 41, which is inserted into the inside of the first fixed plate 31. The inside of the first fixed plate 31 is provided with the second limiting hole 42 that cooperates with the second support rod 41. The bottom of the second support rod 41 is fixed to the surface of the second inner ring 44. The second support leg 39 is designed to move vertically. After the bracket 23 rotates one revolution, the second support leg 39 moves vertically upward to support the workpiece 24, allowing the first support leg 32 to move downward. This allows the support leg 32 to be replaced for the workpiece 24, facilitating the exposure of the covered parts after the first support leg 32 moves downward. Through the design of the second support rod 41 and the second limiting hole 42, the vertical movement of the second support rod 41 is limited, thereby indirectly limiting the vertical movement of the second support leg 39, making the vertical movement of the second support leg 39 more stable.

[0039] A fixed plate 45 is fixed in the middle of the outer wall of the rotating platform 22. Inside the fixed plate 45 are two bidirectional motors, a first 46 and a second 48. Each of the two output shafts of the first 46 has a screw 47. The top of the screw 47 is movably connected to the fixed plate 31. The screw 47 is threadedly connected to the outer ring 43. The bidirectional motor 46 provides power for the rotation of the two screws 47, allowing them to rotate. With the cooperation of the threads on the outer wall of the screw 47 and the inner wall of the outer ring 43, the rotation of the screw 47 enables the synchronous vertical movement of the outer ring 43. The outer ring 43, through the support rod 35, the outer ring 34, and the connecting frame 33, drives the support leg 32 to move synchronously vertically. This allows the bidirectional motor 46 to drive the rotation of the two screws 47, thus enabling the vertical movement of the two outer rings 34. This reduces the number of electrical components and saves costs.

[0040] The two output shafts of the bidirectional motor 48 are respectively equipped with screws 49. The top of the screws 49 is movably connected to the fixed plate 31. The screws 49 are threadedly connected to the inner ring 44. The bidirectional motor 48 provides power for the rotation of the two sets of screws 49, allowing the screws 49 to rotate. With the cooperation of the outer thread of the screws 49 and the inner thread of the inner ring 44, the rotation of the screws 49 enables the vertical movement of the inner ring 44. The inner ring 44 drives the support legs 39 to move vertically synchronously through the support rod 41, the inner ring 37, and the connecting frame 38. The alternating vertical movement of the support legs 32 and 39 enables the replacement of the support part of the workpiece 24. The rotation of one set of bidirectional motors 48 can drive the rotation of two sets of screws 49, thereby realizing the vertical movement of the two sets of inner rings 37, saving the number of electrical components and thus saving costs.

[0041] A fixing block 51 is fixed to the bottom of the fixing plate 2 45, and the fixing block 51 is inserted into the inside of the rotating frame 22. A bolt 52 is inserted into the inside of the fixing block 51, and the side of the bolt 52 away from the fixing block 51 is threadedly connected to the rotating frame 22. The output shaft of the bidirectional motor 46 is fixedly connected to the screw 47. The output shaft of the bidirectional motor 46 is connected to the screw 47 through bolt 53. The output shaft of the bidirectional motor 48 is fixedly connected to the screw 49. The output shaft of the bidirectional motor 48 is connected to the screw 49 through bolt 54. Through the design of the fixing block 51, bolt 52, bolt 53 and bolt 54, the splicing and assembly of the bracket 23 can be realized. After the fixing plate 2 45 is removed, the workpiece 24 can be placed on the lower part of the bracket 23, making the splicing and assembly of the rotating frame 22, the splicing and assembly of the bidirectional motor 46 and the screw 47, and the splicing and assembly of the bidirectional motor 48 and the screw 49 more stable.

[0042] When a coating operation is required on the surface of workpiece 24, first open the housing 21, and place workpiece 24 onto the outer wall of the bracket 23, so that workpiece 24 is supported on the top of support leg 32. Then, the bracket 23 is assembled and fixed by bolts 52, 53, and 54. After the bracket 23 is assembled, close the housing 21, and then connect an external power source to provide power for the operation of the device. Control the rotating platform 22 to start rotating through the control panel. At the same time, control the bracket 23 to start rotating. The rotation of the bracket 23 drives the workpiece 24 supported on the top of support leg 32 to rotate synchronously. When the bracket 23 indirectly drives the workpiece 24 to rotate 360 ​​degrees, the signal is transmitted to the controller, and the controller controls the bidirectional rotation. Motor 2 48 starts working. The bidirectional motor 2 48 drives screw 2 49 to rotate synchronously. When screw 2 49 rotates, inner ring 2 44 moves upward. Inner ring 2 44 drives support leg 2 39 to move upward synchronously through support rod 2 41, inner ring 1 37 and connecting frame 2 38. The bottom of fixed plate 1 31 is equipped with a control switch 55 corresponding to inner ring 2 44. When inner ring 2 44 moves upward, inner ring 2 44 presses against control switch 55. When control switch 55 is pressed, a signal is transmitted to the controller. The controller controls screw 2 49 to stop rotating, so that inner ring 2 44 stops moving, thereby stopping support leg 2 39. The upward movement of support leg 2 39 allows the surface of support leg 2 39 to support the bottom of workpiece 24.

[0043] Simultaneously, the controller controls the output shaft of the bidirectional motor 46 to rotate, causing the screw 47 to rotate. The rotation of the screw 47 causes the outer ring 43 to move downwards. The outer ring 43, through the support rod 35, outer ring 34, and connecting frame 33, drives the support leg 32 to move downwards synchronously, releasing the support leg 32 from the workpiece 24. At this point, the contact area between the support leg 32 and the workpiece 24 is exposed, facilitating coating. The bracket 23 continues to rotate. When the bracket 23 drives the workpiece 24 to rotate another 360 degrees, the coating of the area previously blocked by the support leg 32 is completed. At this point, the controller controls the bidirectional motor 46 to operate, causing the bidirectional motor 46 to rotate downwards. The output shaft of motor 46 is reversed, causing screw 47 to rotate in the opposite direction. The reverse rotation of screw 47 causes outer ring 43 to move upward, indirectly causing support leg 32 to move upward. Support for workpiece 24 is achieved by the upward movement of support leg 32. Subsequently, the controller controls bidirectional motor 48 to work, causing screw 49 to rotate in the opposite direction. The reverse rotation of screw 49 causes inner ring 44 to move downward, indirectly causing support leg 39 to move downward. This releases support for workpiece 24 by support leg 39, restoring support leg 32 to its initial position. This ensures the complete operation of the overall control system and improves the coating effect.

[0044] Based on the above embodiments, Embodiment Two:

[0045] Please see Figure 9In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that the bottom of screw 47 is fixedly connected to the output shaft of unidirectional motor 56, and the bottom of screw 49 is fixedly connected to the output shaft of unidirectional motor 57. Unidirectional motor 56 and unidirectional motor 57 are respectively fixed on the surface of fixed plate 45, so that a single set of unidirectional motor 56 drives the rotation of a single set of screw 47, and a single set of unidirectional motor 57 drives the rotation of a single set of screw 49. The bracket 23 can be assembled as a whole without the need for separate assembly of screw 47 and screw 49 with electrical components, saving assembly time and making the operation simpler.

[0046] Based on the above embodiments, Embodiment 3:

[0047] Please see Figure 10 In this third embodiment, the other structures remain unchanged. The difference from the above embodiments is that the top of both the second support leg 39 and the first support leg 32 are equipped with sliding clamps 61, and the bottom of the sliding clamps 61 are slidably connected to the second support leg 39 and the first support leg 32 respectively via sliders 62. The side wall of the sliding clamps 61 is movably connected with screws 63, and screws 63 are threadedly connected to the second support leg 39 and the first support leg 32 respectively. The end of the screws 63 away from the sliding clamps 61 is fixed with a handle 64. The sliding clamps 61 are slidably connected to the surfaces of the second support leg 39 and the first support leg 32. The position of the sliding clamps 61 can be adjusted according to the diameter of the workpiece 24, so that the position of the sliding clamps 61 can be changed to adapt to the change of the diameter of the workpiece 24. This is beneficial for the second support leg 39 and the first support leg 32 to clamp and fix workpieces 24 of different diameters, so that the clamping and support range of the second support leg 39 and the first support leg 32 is wider.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for preparing a diamond-like carbon film, comprising: The components include a chassis (1), a housing (21), a turntable (22), a support (23), and a workpiece (24). The top of the chassis (1) is provided with a housing (21), and the lower end of the housing (21) is movably connected to a rotating platform (22). The top of the rotating platform (22) is movably connected to a bracket (23), and a workpiece (24) is sleeved on the outside of the bracket (23). Its features are: The support mechanism is located at the bottom of the workpiece (24). The support mechanism includes a fixed plate (31) fixed to the outer wall of the rotating platform (22), and the top of the fixed plate (31) is provided with a support leg (32) for supporting the workpiece (24). The bottom of the workpiece (24) is provided with a support leg (39) for alternately supporting the workpiece (24). The power mechanism is indirectly connected to the first support leg (32) and the second support leg (39) respectively, so as to realize the vertical movement of the first support leg (32) and the second support leg (39). The alternating vertical movement of the first support leg (32) and the second support leg (39) realizes the alternating support of the workpiece (24). The bottom of the support leg (32) is fixed with a connecting frame (33), and the end of the connecting frame (33) away from the support leg (32) is fixed to the outer wall of the outer ring (34), and the bottom of the outer ring (34) is evenly fixed with a support rod (35). The first support rod (35) is inserted inside the first fixed plate (31). The first fixed plate (31) has a limiting hole (36) that cooperates with the first support rod (35). The bottom of the first support rod (35) is fixed to the surface of the second outer ring (43). The bottom of the second support leg (39) is fixed to the surface of the second connecting frame (38), and the bottom of the second connecting frame (38) is fixed to the surface of the first inner ring (37). The bottom of the first inner ring (37) is uniformly fixed with the second support rod (41). The second support rod (41) is inserted inside the first fixed plate (31). The first fixed plate (31) has a limiting hole (42) that cooperates with the second support rod (41). The bottom of the second support rod (41) is fixed to the surface of the second inner ring (44). A fixed plate two (45) is fixed in the middle of the outer wall of the rotating platform (22), and a bidirectional motor one (46) and a bidirectional motor two (48) are fixed inside the fixed plate two (45). The output shafts on both sides of the bidirectional motor one (46) are respectively provided with screw one (47). The top end of the screw one (47) is movably connected to the fixed plate one (31), and the screw one (47) is threadedly connected to the outer ring two (43). The two output shafts of the bidirectional motor 2 (48) are respectively provided with screw 2 (49), the top of the screw 2 (49) is movably connected to the fixed disk 1 (31), and the screw 2 (49) is threadedly connected to the inner ring 2 (44); The bottom of the fixed plate 2 (45) is fixed with a fixed block (51), and the fixed block (51) is inserted into the inside of the rotating frame (22). The fixed block (51) is inserted with a bolt 1 (52), and the side of the bolt 1 (52) away from the fixed block (51) is threadedly connected to the rotating frame (22). The output shaft at the top of the bidirectional motor 1 (46) is fixedly connected to the screw 1 (47). The output shaft at the bottom of the bidirectional motor 1 (46) is connected to the screw 1 (47) through bolt 2 (53). The output shaft at the top of the bidirectional motor 2 (48) is fixedly connected to the screw 2 (49). The output shaft at the bottom of the bidirectional motor 2 (48) is connected to the screw 2 (49) through bolt 3 (54). The top of both the second (39) and the first (32) of the support leg is equipped with a sliding clamp (61), and the bottom of the sliding clamp (61) is slidably connected to the second (39) and the first (32) of the support leg via a slider (62). The side wall of the sliding clamp (61) is movably connected with a screw (63), and the screw (63) is threadedly connected to the second (39) and the first (32) of the support leg. A handle (64) is fixed to the end of the screw (63) away from the sliding clamp (61). It also includes a preparation method, comprising the following steps: Step 1: Open the machine casing (21), and put the workpieces (24) on the outer wall of the bracket (23) respectively, so that the workpieces (24) are mounted on the top of the support leg (32). The bracket (23) is spliced, assembled and fixed by bolts 1 (52), 2 (53) and 3 (54). After the bracket (23) is assembled, close the machine casing (21). Step 2: Connect an external power source to provide power for the operation of the device. Control the rotating platform (22) to start rotating through the control panel. At the same time, control the support (23) to start rotating. The rotation of the support (23) drives the workpiece (24) mounted on the top of the support leg (32) to rotate synchronously. Step 3: After the bracket (23) indirectly drives the workpiece (24) to rotate 360 ​​degrees, the signal is transmitted to the controller. The controller controls the bidirectional motor 2 (48) to start working. The bidirectional motor 2 (48) drives the screw 2 (49) to rotate synchronously. When the screw 2 (49) rotates, the inner ring 2 (44) moves upward. The inner ring 2 (44) drives the support leg 2 (39) to move upward synchronously through the support rod 2 (41), the inner ring 1 (37) and the connecting frame 2 (38). The bottom of the fixed plate 1 (31) is equipped with a control switch (55) corresponding to the inner ring 2 (44). When the inner ring 2 (44) moves upward, the inner ring 2 (44) presses against the control switch (55). When the control switch (55) is pressed, the signal is transmitted to the controller. The controller stops the rotation of screw two (49), causing the inner ring two (44) to stop moving, thereby stopping the movement of support leg two (39). The upward movement of support leg two (39) allows the surface of support leg two (39) to support the bottom of workpiece (24). At the same time, the controller controls the output shaft of bidirectional motor one (46) to rotate, causing screw one (47) to rotate. The rotation of screw one (47) causes outer ring two (43) to move downward. Outer ring two (43) drives support leg one (32) to move downward synchronously through support rod one (35), outer ring one (34) and connecting frame one (33), so that the support of support leg one (32) on workpiece (24) is released. At this time, the contact position between support leg one (32) and workpiece (24) is exposed, which is beneficial for coating. Step 4: The bracket (23) continues to rotate. When the bracket (23) drives the workpiece (24) to rotate 360 ​​degrees again, the coating of the part covered by the support leg (32) is completed. At this time, the controller controls the bidirectional motor (46) to work, so that the output shaft of the bidirectional motor (46) reverses, thereby driving the screw (47) to rotate in the opposite direction. The reverse rotation of the screw (47) causes the outer ring (43) to move upward, indirectly realizing the upward movement of the support leg (32). The upward movement of the support leg (32) supports the workpiece (24). Subsequently, the controller controls the bidirectional motor (48) to work, so that the screw (49) rotates in the opposite direction. The reverse rotation of the screw (49) causes the inner ring (44) to move downward, indirectly realizing the downward movement of the support leg (39). This releases the support of the support leg (39) on the workpiece (24), restoring the initial position of the support leg (32). This ensures the complete operation of the overall control system of the equipment and improves the coating effect.

Images