A composite plating process for surface protection of electrical hardware

Abstract

The present application relates to the field of power fittings surface composite coating, specifically to a kind of composite coating process for the surface protection of power fittings, comprising quenching after the high-temperature tempering treatment of the power fittings sample to be processed.The composite coating process for the surface protection of power fittings described in the present application improves the mechanical properties such as bearing capacity and surface hardness of the composite coating on the surface of power fittings by optimizing the annealing process, PVD deposition process and salt bath surface treatment power, further improves the service life of power fittings, and in the process of glow heating and glow cleaning of the sample by the composite coating device, the sample to be processed placed in each placement groove is driven to vibrate under stress while the placement plate is rotating through transmission, so that different surfaces of the sample to be processed are respectively set upward, facilitating more comprehensive glow heating and glow cleaning treatment.

Description

Technical Field

[0001] This invention relates to the field of composite coatings on the surface of power fittings, specifically a composite coating process for surface protection of power fittings. Background Technology

[0002] Power fittings are metal accessories that connect and combine various devices in a power system, serving to transmit mechanical and electrical loads and provide certain protective functions. They are crucial for the effective and safe operation of power transmission. Power fittings are the foundation of power grid operation, affecting the operational status of the entire transmission line. They are not only related to the safe operation of the power grid but also closely connected to the safety of people and property. During operation, line equipment is constantly subjected to vibration and friction due to the influence of wind and gravity. Therefore, line equipment is prone to wear and tear, leading to insufficient mechanical load-bearing capacity and line breakage. With the increase in operating time, the ultra-high voltage transmission lines built in Northwest my country have shown varying degrees of wear on their line fittings, especially those built in high-altitude, cold, and windy areas, where the wear is more severe than in other regions due to the greater and more frequent wind exposure.

[0003] Traditional fittings are mostly made of malleable cast iron or Q235 steel. The fastening parts of the fittings are made of carbon steel, alloy steel and a small amount of stainless steel. These materials have poor corrosion resistance and need to be hot-dip galvanized before use. Traditional galvanizing anti-corrosion technology is only suitable for normal climatic environments. Because the galvanized layer is soft, it is easily damaged when wear occurs between fittings, and loses its protective function in a short period of time.

[0004] To address the failure problem of power fittings, developing new matrix materials by optimizing alloy element ratios and controlling microstructure morphology is one approach. However, due to the limitations of the material's structure and the inherent contradiction between material strength and toughness, adapting the material as a whole to these requirements is not only technically challenging but also results in significant resource waste. Furthermore, using high-quality materials with superior wear resistance, corrosion resistance, and fatigue resistance to manufacture power fittings would further increase manufacturing costs and process complexity. Summary of the Invention

[0005] To address the problems in the prior art, this invention provides a composite coating process for surface protection of power fittings.

[0006] The technical solution adopted by this invention to solve its technical problem is: a composite coating process for surface protection of power fittings, comprising the following steps:

[0007] S1: Quench the power fitting sample to be processed and then temper it at high temperature. Then polish the processed power fitting sample to be processed until the roughness is ≤0.1μm.

[0008] S2: After cleaning, place the lamp into the coating device for filament glow cleaning treatment;

[0009] S3: Open the Ti target in the coating device, perform etching and priming, then open the three sets of TiZr alloy targets, and at the same time turn on the nitrogen switch to deposit TiZrN and form a PVD hard film;

[0010] The plating device includes a furnace body with a feed inlet. A protective cover for sealing the feed inlet is installed on the outside of the feed inlet. The furnace body has a placement component for placing samples of electrical fittings to be processed inside the furnace body. The furnace body also has a rotation component for rotating the samples of electrical fittings to be processed after they are placed inside the furnace body, and a shaking component for shaking during the rotation process.

[0011] S4: The PVD hard film on the surface of the power fittings is treated with low-temperature salt bath technology to allow Ti and N to diffuse and penetrate, forming a PVD composite salt bath coating.

[0012] The placement assembly includes a mounting base disposed inside the furnace body, a placement plate connected to the mounting base via a circular groove, a plurality of placement slots for placing samples of electrical fittings to be processed on the placement plate, a moving assembly for moving the mounting base and a guiding assembly for guiding the movement between the furnace body and the feed inlet, and a discharge assembly for discharging the samples of electrical fittings to be processed after placement on the placement plate.

[0013] The discharge assembly includes a mounting cavity formed on a placement plate, a sliding plate slidably connected to the mounting cavity, a support block slidably connected to each of the placement slots, one end of each support block being fixed to the sliding plate, and a first connecting assembly for connecting the sliding plate is provided on the placement plate.

[0014] The first connecting assembly includes two sets of transmission rods slidably connected to the lower end of the placement plate. One end of each set of transmission rods is located inside the mounting cavity and fixed to the sliding plate. A mounting ring is fixed to the outside of each transmission rod, and a first spring is sleeved on the outside of each transmission rod. The two ends of the first spring are respectively connected to the mounting ring and the lower end of the placement plate. A transmission assembly for driving the transmission rods is provided on the feed port.

[0015] The transmission assembly includes two transmission plates fixed inside the feed inlet, and one side of each transmission plate has an inclined surface for abutting against one end of the two transmission rods.

[0016] The moving component and the guiding component are symmetrically arranged on both sides of the mounting base. The moving component includes a strip plate fixed to one side of the mounting base, a threaded sleeve fixed on the strip plate, a first fixing block fixed on the inner wall of the feed inlet, a threaded rod rotatably connected between the first fixing block and the inner wall of the furnace body, the threaded rod and the threaded sleeve being engaged with each other, and a first motor for driving the threaded rod is installed on the first fixing block.

[0017] The guiding assembly includes a second fixing block fixed to the inner wall of the feed inlet, and a guide rod fixed between the second fixing block and the inner wall of the furnace body. The strip plate is slidably connected to the guide rod.

[0018] The rotating assembly includes a U-shaped frame fixed to the lower end of the mounting base, a spline shaft rotatably connected to the U-shaped frame, a spline sleeve sleeved on the spline shaft, one end of the spline sleeve being fixed to the lower end of the mounting base, a second motor for driving the spline shaft being mounted on the U-shaped frame, and a reset assembly for resetting after vibration being provided between the spline shaft and the spline sleeve.

[0019] The shaking component includes an L-shaped frame fixed to the lower end of the mounting base, a push rod fixed on the L-shaped frame, and a plurality of protrusions for pushing against the push rod in a circular array at the lower end of the placement plate.

[0020] The reset assembly includes a first fixing ring and a second fixing ring fixed to the outside of the spline shaft and the spline sleeve, respectively. A second spring is connected between the first fixing ring and the second fixing ring, and the second spring is sleeved on the outside of the spline shaft and the spline sleeve.

[0021] The beneficial effects of this invention are:

[0022] The composite coating process for surface protection of power fittings described in this invention improves the mechanical properties of the composite coating on the surface of power fittings, such as load-bearing capacity and surface hardness, by optimizing the annealing process, PVD deposition process, and salt bath surface treatment process, thereby further improving the service life of power fittings. Furthermore, during the glow discharge heating and glow discharge cleaning process of the composite coating device, the placement plate rotates via a transmission mechanism, causing the power fitting samples placed in each placement slot to vibrate under force. This vibration ensures that different sides of the samples are facing upwards, facilitating more comprehensive glow discharge heating and glow discharge cleaning. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the overall external structure of the coating device used in this invention;

[0025] Figure 2 This is a schematic diagram of the feed inlet structure of the coating device used in this invention;

[0026] Figure 3 This is a schematic diagram of the placement component structure of the coating device used in this invention;

[0027] Figure 4 This is a schematic diagram of the moving component and guiding component of the coating device used in this invention;

[0028] Figure 5 This is a schematic diagram of the first connecting component of the coating device used in this invention;

[0029] Figure 6 This is a schematic diagram of the material discharge assembly of the coating device used in this invention;

[0030] Figure 7 This is a schematic diagram of the rotating and resetting components of the coating device used in this invention.

[0031] In the diagram: 101, furnace body; 102, feed inlet; 103, protective cover; 201, strip plate; 202, threaded sleeve; 203, first fixing block; 204, threaded rod; 205, first motor; 301, second fixing block; 302, guide rod; 401, mounting base; 402, circular groove; 403, placement plate; 404, placement slot; 501, mounting cavity; 502, sliding plate; 503, support block; 601, transmission rod; 602, mounting ring; 603, first spring; 701, transmission plate; 702, inclined plane; 901, U-shaped frame; 902, splined shaft; 903, splined sleeve; 904, second motor; 1001, first fixing ring; 1002, second fixing ring; 1003, second spring; 1201, L-shaped frame; 1202, push rod; 1203, protrusion. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures, and should not be construed as limiting the present invention. In order to better illustrate the embodiments of the present invention, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product size; it is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the figures.

[0033] In the figures of this invention, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, 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, the terms used to describe positional relationships in the figures are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above-mentioned terms can be understood according to the specific circumstances.

[0034] like Figure 1-7 The present invention provides a composite coating process for surface protection of power fittings, comprising the following steps:

[0035] S1: The sample of the power fitting to be processed is quenched and then tempered at high temperature. After that, the sample of the power fitting to be processed is polished to a roughness of ≤0.1μm, cleaned and then placed in a coating device for filament glow cleaning treatment.

[0036] S2: After cleaning, place the lamp into the coating device for filament glow cleaning treatment;

[0037] S3: Open the Ti target in the coating device, perform etching and priming, then open the three sets of TiZr alloy targets, and at the same time turn on the nitrogen switch to deposit TiZrN and form a PVD hard film;

[0038] Among them, the Ti target is combined with pulsed arc technology, specifically by connecting to a modulated high-current pulsed arc, using a DC base current superimposed with a pulse current as the discharge power supply for arc discharge; the bias voltage is 800-1200V, the base current is set to 20-50A, the pulse current is set to: peak current 100-1500A, pulse frequency is 1-1kHz, and duty cycle is 1%-80%.

[0039] Among them, three groups of TiZr alloys are combined with DC arc ion plating technology to rapidly deposit TiZrN. During the deposition process, nitrogen gas is cyclically changed from 200 to 1800 SCCM, or deposited alternately at 200 / 1800 SCCM, with a bias voltage of 40V to relieve the stress of the coating.

[0040] S4: The PVD hard film on the surface of the power fittings is treated with low-temperature salt bath technology to allow Ti and N to diffuse and penetrate, forming a PVD composite salt bath coating.

[0041] Titanium is an environmentally friendly, generally inert, lightweight metal material with high tensile strength and excellent corrosion resistance. Low-temperature salt bath technology involves placing the workpiece in an inert liquid furnace, which is heated to a relatively low temperature. This allows the titanium and nitrogen in the inert liquid to penetrate into the coating on the surface of the workpiece, thereby increasing the product's hardness, tensile strength, corrosion resistance, and wear resistance.

[0042] By optimizing the annealing process, PVD deposition process, and nitriding process, the nitriding process improves the mechanical properties of the composite coating on the surface of power fittings, such as load-bearing capacity and surface hardness, thereby further improving the service life of power fittings.

[0043] It also includes a plating device, which includes a furnace body 101. The furnace body 101 is provided with a feed inlet 102. A protective cover 103 for sealing the feed inlet 102 is installed on the outside of the feed inlet 102. The furnace body 101 is provided with a placement component for placing the sample of the power fitting to be processed. The furnace body 101 is also provided with a rotation component for rotating the sample of the power fitting to be processed after it is placed in the furnace body and a shaking component for shaking during the rotation.

[0044] Specifically, the placement assembly includes a mounting base 401 located inside the furnace body 101. A placement plate 403 is connected to the mounting base 401 via a circular groove 402. The placement plate 403 has multiple placement slots 404 for placing the power fitting samples to be processed. A moving assembly for moving the mounting base 401 and a guiding assembly for guiding the movement are provided between the furnace body 101 and the feed inlet 102. The placement plate 403 is provided with a discharge assembly for discharging the power fitting samples to be processed after placement. During the glow discharge heating and glow discharge cleaning of the samples by the composite coating device, the placement plate 403 rotates while driving the power fitting samples to be processed placed in each placement slot 404 to vibrate under force. Through the vibration of the power fitting samples, different sides of the samples are positioned facing upwards, which facilitates more comprehensive glow discharge heating and glow discharge cleaning.

[0045] Specifically, the discharge assembly includes a mounting cavity 501 opened on the placement plate 403, a sliding plate 502 slidably connected to the mounting cavity 501, a support block 503 slidably connected to each placement slot 404, one end of each support block 503 being fixed to the sliding plate 502, and a first connecting assembly for connecting the sliding plate 502 is provided on the placement plate 403.

[0046] Specifically, the first connecting assembly includes two sets of transmission rods 601 slidably connected to the lower end of the placement plate 403. One end of each set of transmission rods 601 is located inside the mounting cavity 501 and fixed to the sliding plate 502. A mounting ring 602 is fixed to the outside of the transmission rods 601, and a first spring 603 is sleeved on the outside of the transmission rods 601. The two ends of the first spring 603 are respectively connected to the mounting ring 602 and the lower end of the placement plate 403. A transmission assembly for driving the transmission rods 601 is provided on the feed port 102. Through the transmission rods 601, the mounting ring 602 and the first spring 603, the sliding plate 502 is easily slidably connected inside the mounting cavity 501.

[0047] Specifically, the transmission assembly includes two transmission plates 701 fixed inside the feed inlet 102. One side of each transmission plate 701 has an inclined surface 702 for abutting against one end of each of the two transmission rods 601. After the glow discharge heating and glow discharge cleaning processes are completed, the mounting base 401 is driven to move outward through the cooperation of the moving assembly and the guiding assembly. During the movement, the two transmission rods 601 abut against the inclined surfaces 702 on the two transmission plates 701, pushing the transmission rods 601 towards the interior of the mounting cavity 501. During the movement, the sliding plate 502 pushes each support block 503 to move on each placement slot 404. During the movement, the support block 503 lifts the sample placed inside the placement slot 404, facilitating the unloading of the processed sample.

[0048] Specifically, the moving component and the guiding component are symmetrically arranged on both sides of the mounting base 401. The moving component includes a strip plate 201 fixed to one side of the mounting base 401, a threaded sleeve 202 fixed on the strip plate 201, a first fixing block 203 fixed on the inner wall of the feed inlet 102, and a threaded rod 204 rotatably connected between the first fixing block 203 and the inner wall of the furnace body 101. The threaded rod 204 and the threaded sleeve 202 are engaged with each other. A first motor 205 for driving the threaded rod 204 is mounted on the first fixing block 203. The guiding component includes a second fixing block 301 fixed on the inner wall of the feed inlet 102. A guide rod 302 is fixed between the second fixed block 301 and the inner wall of the furnace body 101, and the strip plate 201 is slidably connected to the guide rod 302. The first motor 205 drives the threaded rod 204 to rotate. During the rotation of the threaded rod 204, the strip plate 201 and the mounting base 401 are driven to move under force through the mutual meshing transmission between the threaded rod 204 and the threaded sleeve 202. During the movement of the strip plate 201 and the mounting base 401, the guide rod 302 guides the strip plate 201 and the mounting base 401 to move towards or away from the feed inlet 102.

[0049] Specifically, the rotating assembly includes a U-shaped frame 901 fixed to the lower end of the mounting base 401. A splined shaft 902 is rotatably connected to the U-shaped frame 901, and a splined sleeve 903 is sleeved on the splined shaft 902. One end of the splined sleeve 903 is fixed to the lower end of the mounting base 401. A second motor 904 for driving the splined shaft 902 is mounted on the U-shaped frame 901. A reset assembly for resetting after vibration is provided between the splined shaft 902 and the splined sleeve 903. When the second motor 904 is started, the splined shaft 902 is driven to rotate. During the rotation of the splined shaft 902, the placement plate 403 is driven to rotate on the circular groove 402 through the transmission action between the splined shaft 902 and the splined sleeve 903. The rotation of the placement plate 403 facilitates more comprehensive glow discharge heating and glow discharge cleaning of the power fitting sample to be processed placed on the placement groove 404.

[0050] Specifically, the vibration assembly includes an L-shaped frame 1201 fixed to the lower end of the mounting base 401, a push rod 1202 fixed on the L-shaped frame 1201, and a plurality of protrusions 1203 for pushing against the push rod 1202 in a circular array at the lower end of the placement plate 403. During the rotation of the placement plate 403, each protrusion 1203 abuts against one end of the push rod 1202 in sequence. When the protrusion 1203 abuts against the push rod 1202, it drives the placement plate 403 to move upward on the circular groove 402. During the upward movement of the placement plate 403, it pulls the first fixing ring 1001 and the second fixing ring 1002. The second spring 1003 between 02 is deformed by force to generate elastic force. When the protrusion 1203 does not abut against the push rod 1202, the elastic force of the second spring 1003 pulls the placement plate 403 to reset on the circular groove 402. Therefore, during the rotation of the placement plate 403, the transmission drives the placement plate 403 to move up and down on the circular groove 402. Through the reciprocating motion of the placement plate 403, the power fitting samples to be processed placed in each placement groove 404 are shaken by force. Through the shaking of the power fitting samples to be processed, different sides of the samples are set facing upwards.

[0051] Specifically, the reset assembly includes a first fixing ring 1001 and a second fixing ring 1002 respectively fixed to the outside of the spline shaft 902 and the spline sleeve 903. A second spring 1003 is connected between the first fixing ring 1001 and the second fixing ring 1002. The second spring 1003 is sleeved on the outside of the spline shaft 902 and the spline sleeve 903. During the upward movement of the placement plate 403, the second spring 1003 between the first fixing ring 1001 and the second fixing ring 1002 is pulled and deformed to generate elastic force. When the protrusion 1203 does not abut against the push rod 1202, the elastic force of the second spring 1003 pulls the placement plate 403 to reset on the circular groove 402.

[0052] Working principle: By optimizing the nitriding process, annealing process, and PVD deposition process, the mechanical properties such as load-bearing capacity and surface hardness of the composite coating on the surface of power fittings are improved, thereby further improving the service life of power fittings.

[0053] During the glow discharge heating and glow discharge cleaning process using the composite coating device, the protective cover 103 is opened from the feed inlet 102. After opening, the mounting base 401 is driven to slide out of the furnace body 101 through the feed inlet 102 via the cooperation of the moving component and the guiding component. After the mounting base 401 slides out, the electrical fitting samples to be processed are placed on the respective placement slots 404 of the placement plate 403. After placement, the mounting base 401 is driven to move to the furnace body 101 via the cooperation of the moving component and the guiding component. Inside furnace 101, the power fitting sample to be processed undergoes glow discharge heating and glow discharge cleaning. During this process, the second motor 904 is started, driving the spline shaft 902 to rotate. As the spline shaft 902 rotates, the transmission between the spline shaft 902 and the spline sleeve 903 drives the placement plate 403 to rotate on the circular groove 402. This rotation of the placement plate 403 facilitates a more comprehensive glow discharge cleaning of the power fitting sample placed on the placement groove 404. The process involves photoheating and glow discharge cleaning. During the rotation of the placement plate 403, each protrusion 1203 sequentially abuts against one end of the push rod 1202. When the protrusion 1203 abuts against the push rod 1202, it drives the placement plate 403 to move upwards on the circular groove 402. During this upward movement, the second spring 1003 between the first fixing ring 1001 and the second fixing ring 1002 is pulled and deformed, generating elastic force. When the protrusion 1203 is not abutting against the push rod 1202, the second spring... The elastic force of 1003 pulls the placement plate 403 to reset on the circular groove 402. Therefore, during the rotation of the placement plate 403, through transmission, the placement plate 403 is driven to move up and down on the circular groove 402. Through the reciprocating motion of the placement plate 403, the power fitting samples to be processed placed in each placement groove 404 are shaken by force. Through the shaking of the power fitting samples to be processed, different sides of the samples are set facing upwards, which facilitates more comprehensive glow discharge heating and glow discharge cleaning treatment.

[0054] After glow discharge heating and glow discharge cleaning are completed, the mounting base 401 is driven to move outward through the cooperation of the moving component and the guiding component. During the movement, the two transmission rods 601 abut against the inclined surfaces 702 on the two transmission plates 701, pushing the transmission rods 601 towards the interior of the mounting cavity 501. During the movement, the sliding plate 502 pushes the support blocks 503 to move on the placement slots 404 respectively. During the movement, the support blocks 503 lift the samples placed inside the placement slots 404, facilitating the unloading of the processed samples.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention. Technical aspects, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A composite plating process for surface protection of power fittings, characterized in that, Includes the following steps: S1: Quench the power fitting sample to be processed and then temper it at high temperature. Then polish the processed power fitting sample to be processed until the roughness is ≤0.1μm. S2: Place the cleaned electrical fitting sample into the plating device for filament glow cleaning treatment; S3: Open the Ti target in the coating device, perform etching and priming, then open the three sets of TiZr alloy targets, and at the same time turn on the nitrogen switch to deposit TiZrN and form a PVD hard film; The plating device includes a furnace body (101), a feed inlet (102) is provided on the furnace body (101), a protective cover (103) for sealing the feed inlet (102) is installed on the outside of the feed inlet (102), a placement component for placing the sample of the power fitting to be processed is provided inside the furnace body (101), a rotation component for rotating the sample of the power fitting to be processed after placement and a shaking component for shaking during rotation are provided inside the furnace body (101); S4: The PVD hard film on the surface of the power fitting sample is treated with low-temperature salt bath technology to allow Ti and N to diffuse and penetrate, forming a PVD composite salt bath coating.

2. A composite coating device for surface protection of power fittings, comprising employing the composite coating process for surface protection of power fittings as described in claim 1, characterized in that: The placement assembly includes a mounting base (401) disposed inside the furnace body (101). A placement plate (403) is connected to the mounting base (401) via a circular groove (402). The placement plate (403) has multiple placement slots (404) for placing samples of electrical fittings to be processed. A moving assembly for moving the mounting base (401) and a guiding assembly for guiding the movement are provided between the furnace body (101) and the feed inlet (102). The placement plate (403) is provided with a discharge assembly for discharging the placed samples of electrical fittings to be processed.

3. A composite plating device for surface protection of power fittings according to claim 2, characterized in that: The discharge assembly includes an installation cavity (501) opened on the placement plate (403), a sliding plate (502) slidably connected to the installation cavity (501), a support block (503) slidably connected to each of the placement slots (404), one end of each support block (503) being fixed to the sliding plate (502), and a first connecting component for connecting the sliding plate (502) is provided on the placement plate (403).

4. A composite plating device for surface protection of power fittings according to claim 3, characterized in that: The first connecting assembly includes two sets of transmission rods (601) slidably connected to the lower end of the placement plate (403). One end of each set of transmission rods (601) is located inside the mounting cavity (501) and fixed to the sliding plate (502). A mounting ring (602) is fixed to the outside of each transmission rod (601). A first spring (603) is sleeved on the outside of each transmission rod (601). The two ends of the first spring (603) are respectively connected to the mounting ring (602) and the lower end of the placement plate (403). A transmission assembly for driving the transmission rods (601) is provided on the feed port (102).

5. A composite plating device for surface protection of power fittings according to claim 4, characterized in that: The transmission assembly includes two transmission plates (701) fixed inside the feed inlet (102), and one side of each of the two transmission plates (701) has an inclined surface (702) for abutting against one end of each of the two transmission rods (601).

6. A composite coating device for surface protection of power fittings according to claim 2, characterized in that: The moving component and the guiding component are symmetrically arranged on both sides of the mounting base (401). The moving component includes a strip plate (201) fixed on one side of the mounting base (401). A threaded sleeve (202) is fixed on the strip plate (201). A first fixing block (203) is fixed on the inner wall of the feed port (102). A threaded rod (204) is rotatably connected between the first fixing block (203) and the inner wall of the furnace body (101). The threaded rod (204) and the threaded sleeve (202) are meshed with each other. A first motor (205) for driving the threaded rod (204) is installed on the first fixing block (203).

7. A composite plating device for surface protection of power fittings according to claim 6, characterized in that: The guiding assembly includes a second fixing block (301) fixed on the inner wall of the feed inlet (102), and a guide rod (302) is fixed between the second fixing block (301) and the inner wall of the furnace body (101). The strip plate (201) is slidably connected to the guide rod (302).

8. A composite coating device for surface protection of power fittings according to claim 2, characterized in that: The rotating assembly includes a U-shaped frame (901) fixed to the lower end of the mounting base (401), a spline shaft (902) rotatably connected to the U-shaped frame (901), a spline sleeve (903) sleeved on the spline shaft (902), one end of the spline sleeve (903) being fixed to the lower end of the mounting base (401), a second motor (904) for driving the spline shaft (902) mounted on the U-shaped frame (901), and a reset assembly for resetting after vibration is provided between the spline shaft (902) and the spline sleeve (903).

9. A composite plating device for surface protection of power fittings according to claim 8, characterized in that: The shaking component includes an L-shaped frame (1201) fixed to the lower end of the mounting base (401), a push rod (1202) fixed on the L-shaped frame (1201), and a plurality of protrusions (1203) for pushing against the push rod (1202) are fixed in a circular array at the lower end of the placement plate (403).

10. A composite coating device for surface protection of power fittings according to claim 8, characterized in that: The reset assembly includes a first fixing ring (1001) and a second fixing ring (1002) fixed to the outside of the spline shaft (902) and the spline sleeve (903) respectively. A second spring (1003) is connected between the first fixing ring (1001) and the second fixing ring (1002), and the second spring (1003) is sleeved on the outside of the spline shaft (902) and the spline sleeve (903).

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