Surface treatment device and method for metal thin strip coiled material for forming slotted bushing

Abstract

The invention relates to a surface treatment device and method for a metal thin strip coiled material for forming a slotted bushing. The surface treatment device for the metal thin strip coiled material for forming the slotted lining comprises a controller, and an uncoiling machine, a sand blasting device, a cleaning device, a drying device, a molybdenum disulfide spraying machine, a molybdenum disulfide curing machine and a coiling machine which are sequentially arranged in the strip conveying direction and are electrically connected with the controller; the uncoiler is used for opening the metal coil to form a strip; the sand blasting device is used for blasting sand on the upper surface of the strip so as to form a sand blasting layer on the upper surface of the strip; the molybdenum disulfide spraying machine is used for coating the upper surface of the strip with molybdenum disulfide paint so as to form a molybdenum disulfide coating on the sand blasting layer; and the molybdenum disulfide curing machine is used for curing the molybdenum disulfide coating. Continuous coating of the surface of the metal thin strip coiled material can be achieved, and the adhesive force of a coating on the surface of the metal thin strip coiled material for forming the slotted lining can be effectively improved.

Description

Technical Field

[0001] The invention relates to the field of metal coil surface lubrication treatment, and in particular to a metal thin strip coil surface treatment device and method for forming a slotted bushing. Background Art

[0002] Surface treatment is to form a layer with one or more special properties on the surface of a material (or product) by physical or chemical methods. Surface treatment can improve the corrosion resistance, wear resistance, decoration or other special functional requirements of the material (or product).

[0003] Since metal coils occupy a small area and are easy to transport, thin strips are mostly produced and supplied in the form of bare metal coils, and thin strip processing manufacturers then unwind, process, and apply them according to actual needs. During the processing or application of aviation parts and process parts, it is necessary to apply an anti-corrosion or lubricating coating on the surface of the strip (single or double sides) to obtain a uniform surface coating with good bonding strength, thereby meeting the anti-corrosion or lubrication needs of parts and process parts processing or application.

[0004] The existing coating method for this type of thin strip is to cut the metal coil after unwinding it, cut it into thin strip sections of a certain length, and then treat the surface of the thin strip section (chemical treatment, physical treatment) to prepare a thin strip with a coating layer on the surface; this technology is a method of cutting the thin strip coil and then coating it in steps, which has prominent disadvantages. The whole process involves multiple processes, and the transfer and docking between processes are cumbersome and inconvenient to transport, resulting in low processing efficiency, requiring more manpower and increasing labor costs, and even easily causing process disorder; at the same time, the method of cutting the raw material of the strip first and then coating it inevitably produces tail materials, thereby reducing the material utilization rate of the entire thin strip coil; in addition, the coating is affected by factors such as equipment conditions, operating space, and technical level. When the cut strip is coated in multiple batches, the stability between batches (coating thickness, bonding strength) is difficult to control. Summary of the invention

[0005] The object of the present invention is to provide a surface treatment device and method for a metal thin strip coil for forming a slotted bushing, which can achieve continuous coating of the surface of the metal thin strip coil and effectively improve the adhesion of the surface coating of the metal thin strip coil for forming a slotted bushing.

[0006] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0007] The present invention provides a surface treatment device for a metal thin strip coil for forming a slit bushing, comprising a controller and an uncoiler, a sandblasting device, a cleaning device, a drying device, a molybdenum disulfide sprayer, a molybdenum disulfide curing machine and a coiler which are sequentially arranged along the conveying direction of the strip and electrically connected to the controller; the uncoiler is used for opening the metal coil to form a strip; the sandblasting device is used for sandblasting the upper surface of the strip to form a sandblasting layer on the upper surface of the strip; the molybdenum disulfide sprayer is used for coating the upper surface of the strip with molybdenum disulfide paint to form a molybdenum disulfide coating on the sandblasting layer; the molybdenum disulfide curing machine is used for curing the molybdenum disulfide coating.

[0008] In a preferred embodiment of the present invention, the molybdenum disulfide coating is composed of 25-30% molybdenum disulfide, 35-55% phenolic resin, 5-10% lubricant and the balance organic solvent, in terms of weight percentage.

[0009] In a preferred embodiment of the present invention, the lubricant is composed of polytetrafluoroethylene, lead powder and graphite powder, and the weight ratio is (2-4):(2-4):1; the organic solvent is ethylene glycol ethyl ether acetate.

[0010] In a preferred embodiment of the present invention, the spraying distance of the molybdenum disulfide sprayer is 150-200 mm, the spraying pump speed is 3.0-8.0 g / min, the temperature of the spraying chamber is 40-60°C; the curing temperature of the molybdenum disulfide curing machine is 180-200°C.

[0011] In a preferred embodiment of the present invention, a straightening wheel assembly is further provided between the uncoiler and the sandblasting device, the straightening wheel assembly comprising a plurality of upper straightening wheels arranged at intervals and a plurality of lower straightening wheels arranged at intervals, and the plurality of upper straightening wheels and the plurality of lower straightening wheels are staggered along the strip conveying direction.

[0012] In a preferred embodiment of the present invention, a roughness detector is provided between the sandblasting device and the cleaning device and near the sandblasting outlet thereof, for detecting the surface roughness of the strip; the controller is electrically connected to the roughness detector, and can control the prompter to emit a prompt sound when the roughness detected by the roughness detector is less than a preset value, and can also adjust the pressure, speed and sandblasting amount of the sandblasting gun of the sandblasting device according to the data detected by the roughness detector.

[0013] In a preferred embodiment of the present invention, a water-absorbing cotton strip is provided at the cleaning outlet of the cleaning device; and a sponge block is also provided between the molybdenum disulfide sprayer and the molybdenum disulfide curing machine for wiping the lower surface of the strip.

[0014] In a preferred embodiment of the present invention, the drying temperature of the drying device is 120-150°C, and the speed of the strip movement is 10-20m / s; a humidity detector is provided in the drying device, the controller is electrically connected to the humidity detector, and can adjust the temperature in the drying device according to the data detected by the humidity detector.

[0015] In a preferred embodiment of the present invention, the molybdenum disulfide sprayer is also connected to a molybdenum disulfide feed box, which is equipped with an agitator; a thickness detector is also provided in the molybdenum disulfide sprayer for detecting the thickness of the molybdenum disulfide coating; a thermometer is also provided between the molybdenum disulfide sprayer and the molybdenum disulfide curing machine for detecting the temperature of the molybdenum disulfide coating; the controller is electrically connected to the agitator, the thickness detector and the thermometer, and can adjust the coating time of the molybdenum disulfide sprayer according to the data detected by the thickness detector, and can also control the curing temperature of the molybdenum disulfide curing machine according to the data detected by the thermometer.

[0016] The present invention also provides a method for lubricating the surface of a metal thin strip coil for forming a slotted bushing, comprising:

[0017] Uncoiling: Uncoiling a metal coil to form a strip using an uncoiling machine;

[0018] Sandblasting: conveying the strip into the sandblasting device, sandblasting the upper surface of the strip to form a sandblasting layer on the upper surface of the strip;

[0019] Cleaning: The strip after sandblasting is conveyed into the cleaning device to clean the strip;

[0020] Drying: The cleaned strip is conveyed into the drying device to dry the strip;

[0021] Spraying: conveying the dried strip into a molybdenum disulfide spraying machine, coating the upper surface of the strip with molybdenum disulfide paint to form a molybdenum disulfide coating on the sandblasting layer;

[0022] Curing: The sprayed strip is conveyed into the molybdenum disulfide curing machine to cure the molybdenum disulfide coating;

[0023] Winding: The solidified strip is conveyed into the winder for winding.

[0024] As described above, the processing device of the present invention effectively integrates the uncoiler, sandblasting device, cleaning device, drying device, molybdenum disulfide sprayer, molybdenum disulfide curing machine and winder, and can realize efficient and orderly automatic surface lubrication coating of the entire coil without affecting the thin strip coil; uncoiling, coating and winding are all automatically controlled, and no intermediate cutting and manual transportation are required, thus realizing the technology of continuous surface coating of thin strip coils, greatly saving manpower and transportation costs; all surface treatments are controlled online, which improves efficiency while achieving uniform control of the entire coil processing effect and coating thickness; after the entire processing process is completed, the final product is still a thin strip coil, which does not damage the raw material state and is convenient for subsequent parts and process parts processing. The entire processing device is particularly suitable for lubricating and coating the surface of metal thin strip coils for forming slotted bushings, especially in the aerospace field where high requirements are placed on the adhesion of the coating on the slotted bushings. The use of molybdenum disulfide coating has better adhesion. At the same time, sandblasting before spraying can enhance the roughness of the strip surface, which is more helpful to improve the adhesion when spraying the molybdenum disulfide coating. Curing the molybdenum disulfide coating after spraying can further enhance the adhesion of the coating. The combination of sandblasting, molybdenum disulfide spraying and curing can significantly improve the adhesion of the coating, which is more conducive to achieving better process effects when subsequent slotted bushing products are used.

[0025] The treatment method of the present invention adopts a method combining continuous unwinding + sandblasting + cleaning + drying + spraying + curing + winding processes of the strip, which can complete the continuous coating of the strip, realize efficient and orderly automatic surface lubrication coating of the entire coil, and then obtain a surface coating layer with consistent bonding force and high thickness uniformity, and can save manpower on-site in the production workshop and improve efficiency. The use of molybdenum disulfide coating and sandblasting of the strip surface before spraying can effectively improve the adhesion of the coating, which is more conducive to the subsequent slit bushing products to achieve better process effects when used. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0027] in:

[0028] Figure 1 A schematic structural diagram of a metal strip coil surface treatment device for forming a slotted bushing provided by the present invention.

[0029] Description of Figure Numbers:

[0030] 1. Unwinder; 2. Straightening wheel assembly; 21. Upper straightening wheel; 22. Lower straightening wheel; 3. Sandblasting device; 4. Cleaning device; 5. Drying device; 6. Molybdenum disulfide spraying machine; 61. Molybdenum disulfide feeding box; 7. Molybdenum disulfide curing machine; 8. Winder. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0032] like Figure 1 As shown, the present application provides a surface treatment device for a metal thin strip coil for forming a slit bushing, comprising a controller and an uncoiler 1, a sandblasting device 3, a cleaning device 4, a drying device 5, a molybdenum disulfide sprayer 6, a molybdenum disulfide curing machine 7 and a reel 8 which are sequentially arranged along the conveying direction of the strip and electrically connected to the controller; the uncoiler 1 is used to open the metal coil to form a strip; the sandblasting device 3 is used to sandblast the upper surface of the strip to form a sandblasting layer on the upper surface of the strip; the molybdenum disulfide sprayer 6 is used to coat the upper surface of the strip with molybdenum disulfide coating to form a molybdenum disulfide coating on the sandblasting layer; the molybdenum disulfide curing machine 7 is used to cure the molybdenum disulfide coating.

[0033] The conveying direction of the strip can be determined according to actual conditions, for example, in this embodiment, it is a horizontal straight line direction, and each device is arranged in sequence along the horizontal straight line direction. During operation, the metal coil is opened by the unwinder 1 to form a continuously conveyed strip (plate), and the strip is successively sandblasted, cleaned, dried, coated and cured by the sandblasting device 3, the cleaning device 4, the drying device 5, the molybdenum disulfide spraying machine 6 and the molybdenum disulfide curing machine 7, and then reeled by the reel 8; the actions of each device during the operation are controlled by the controller.

[0034] Therefore, the processing device in the present application effectively integrates the unwinder 1, the sandblasting device 3, the cleaning device 4, the drying device 5, the molybdenum disulfide sprayer 6, the molybdenum disulfide curing machine 7 and the winder 8, and can realize efficient and orderly automatic surface lubrication coating of the entire coil without affecting the thin strip coil; unwinding, coating and winding are all automatically controlled, without the need for intermediate cutting and manual transportation, realizing the technology of continuous surface coating of thin strip coils, greatly saving manpower and transportation costs; all surface treatments are controlled online, which improves efficiency while achieving uniform control of the entire coil processing effect and coating thickness; after the entire processing process is completed, it is still a thin strip coil, which does not damage the raw material state, and is convenient for subsequent parts and process parts processing.

[0035] The entire processing device is particularly suitable for lubricating and coating the surface of metal thin strip coils for forming slotted bushings, especially in the aerospace field where high requirements are placed on the adhesion of the coating on the slotted bushings. The use of molybdenum disulfide coating has better adhesion. At the same time, sandblasting before spraying can enhance the roughness of the strip surface, which is more helpful to improve the adhesion when spraying the molybdenum disulfide coating. Curing the molybdenum disulfide coating after spraying can further enhance the adhesion of the coating. The combination of sandblasting, molybdenum disulfide spraying and curing can significantly improve the adhesion of the coating, which is more conducive to achieving better process effects when subsequent slotted bushing products are used.

[0036] Preferably, the molybdenum disulfide coating consists of 25-30% molybdenum disulfide, 35-55% phenolic resin, 5-10% lubricant and the balance organic solvent, in terms of weight percentage.

[0037] The lubricant is preferably composed of polytetrafluoroethylene, lead powder and graphite powder, and the weight ratio is (2-4): (2-4): 1, and the weight ratio is more preferably 2: 2: 1. The organic solvent is preferably ethylene glycol ethyl ether acetate.

[0038] The use of molybdenum disulfide coating with this composition and proportion can make the formed molybdenum disulfide coating have better adhesion and be less likely to fall off, which is more conducive to achieving better process effects when subsequent slotted bushing products are used, and helps to smoothly pull out the core rod of the slotted bushing during installation, thereby improving the fatigue life of the structural hole.

[0039] Further preferably, the spraying distance of the molybdenum disulfide sprayer 6 is 150-200 mm, the spraying pump speed is 3.0-8.0 g / min, the temperature of the spraying chamber is 40-60° C., and the curing temperature of the molybdenum disulfide curing machine 7 is 180-200° C. The spraying parameters and curing parameters match the molybdenum disulfide coating, which is more conducive to significantly improving the adhesion of the molybdenum disulfide coating.

[0040] The molybdenum disulfide coating and spraying process used in this embodiment are designed according to the use characteristics of the slotted bushing. Only when the molybdenum disulfide coating composition and the spraying parameters are organically combined can the best effect be achieved and the adhesion of the coating be optimal.

[0041] Furthermore, a straightening wheel assembly 2 is provided between the uncoiler 1 and the sandblasting device 3. The straightening wheel assembly 2 includes a plurality of upper straightening wheels 21 arranged at intervals and a plurality of lower straightening wheels 22 arranged at intervals. The plurality of upper straightening wheels 21 and the plurality of lower straightening wheels 22 are staggered along the conveying direction of the strip to straighten the strip.

[0042] Furthermore, a roughness detector is provided between the sandblasting device 3 and the cleaning device 4 and near the sandblasting outlet thereof, for detecting the surface roughness of the strip; the controller is electrically connected to the roughness detector, and can control a prompter (such as an alarm) to emit a prompt sound when the roughness detected by the roughness detector is less than a preset value, and can also adjust the pressure, speed and sandblasting amount of the sandblasting gun of the sandblasting device 3 according to the data detected by the roughness detector.

[0043] The entire sandblasting device 3 includes a sandblasting box and a power device. The sandblasting box is provided with a sandblasting inlet and a sandblasting outlet arranged opposite to each other for the strip to enter and exit. A plurality of sandblasting guns are provided at the top of the sandblasting box to perform sandblasting on the upper surface of the strip. Since the metal thin strip coil for forming the slotted bushing in this embodiment only needs to have a coating on one side and the other side needs to be smooth, it is only necessary to perform sandblasting on the upper surface of the strip. The power device includes a servo motor and a pump. The servo motor is connected to the pump to drive the pump to operate. The pump is connected to each sandblasting gun through a corresponding pipeline to mix the high-pressure airflow with the abrasive and then spray it out through the sandblasting gun. A frequency converter is connected to the servo motor, and the controller is connected to the frequency converter. Under the action of the roughness detector, the surface roughness of the strip after sandblasting is automatically detected. Then the controller can control the output shaft speed of the servo motor by controlling the frequency converter, and automatically adjust the pressure, speed and sandblasting amount of the sandblasting gun, so as to obtain the surface roughness required for spraying, so as to be more conducive to improving the adhesion of the subsequent molybdenum disulfide coating.

[0044] During actual processing, after the strip is sandblasted at the beginning, if the roughness detector detects that the surface roughness of the strip does not meet the standard, the controller will control the alarm to sound, and the part of the strip that does not meet the initial roughness standard can be directly cut off; the controller adjusts the relevant parameters of the sandblasting gun according to the detected roughness to ensure that the roughness obtained by subsequent sandblasting meets the requirements.

[0045] The cleaning device 4 comprises a cleaning box, on which a cleaning inlet and a cleaning outlet are arranged opposite to each other for the strip to enter and exit. A plurality of flushing nozzles are arranged in the cleaning box, which can effectively remove the oxide scale on the surface of the strip and flush the impurities on the surface of the strip.

[0046] A water-absorbing cotton strip is preferably provided at the cleaning outlet of the cleaning device 4 to absorb the liquid on the surface of the strip after flushing.

[0047] The cleaned strip enters the drying device 5, and the drying parameters are as follows: the drying temperature is 120-150°C, and the strip moving speed is 10-20mm / s. The drying device 5 includes a drying box, and a drying inlet and a drying outlet arranged opposite to each other are provided on the drying box for the strip to enter and exit. The drying device 5 can be heated and dried by an induction coil, or other drying methods can be used. A humidity detector is provided in the drying device 5 to detect the humidity in the drying device 5 to reflect the water vapor concentration in the drying box. The controller is electrically connected to the humidity detector, and can adjust the temperature in the drying device 5 according to the data detected by the humidity detector, increase or decrease the temperature, and avoid the strip being insufficiently dry to affect the coating effect of molybdenum disulfide in the subsequent process.

[0048] The dried strip enters the molybdenum disulfide spraying machine 6, which includes a spraying box and a power device. The spraying box is provided with a spraying inlet and a spraying outlet arranged opposite to each other for the strip to enter and exit. A plurality of coating spray guns are provided at the top of the spraying box to coat the upper surface of the strip. Since the metal thin strip coil for forming the slit bushing in this embodiment only needs to have a coating on one side, only the upper surface of the strip needs to be coated. Of course, in another optional embodiment, a plurality of coating spray guns can be provided at the top and the bottom of the spraying box. When applied to the metal thin strip coil for forming the slit bushing, only the coating spray gun at the top can be used for coating; when applied to other occasions requiring double-sided coating, the coating spray guns at the top and the bottom can be started at the same time to meet the requirements of single-sided or double-sided coating at the same time.

[0049] The power device includes an air compressor and a pumping device. The pumping device is connected to the air compressor and each coating spray gun through corresponding pipelines. When in use, turn on the air compressor to prepare compressed air, use acetone to clean the equipment spray pipeline, check the spray gun status, the spray gun should be unobstructed and the spray atomization should be normal; then use the pumping device to mix the compressed air with molybdenum disulfide and spray it through the coating spray gun. The temperature in the molybdenum disulfide spraying device is controllable and adjustable, and can be adjusted using a controller.

[0050] The molybdenum disulfide spraying machine 6 is also connected to a molybdenum disulfide feed box 61, in which a stirrer is arranged, and the controller is electrically connected to the stirrer. By setting the stirrer, precipitation of the solution can be avoided while waiting for use, and the concentration of molybdenum disulfide can be controlled to ensure the consistency of the appearance of the molybdenum disulfide coating sprayed on the strip. Stirring parameters: the rotation speed is 50 to 100 r / min.

[0051] A thickness detector is also provided in the molybdenum disulfide spraying machine 6 for detecting the thickness of the molybdenum disulfide coating; the controller is electrically connected to the thickness detector and can adjust the coating time of the molybdenum disulfide spraying machine 6 according to the data detected by the thickness detector.

[0052] A thermometer is also provided between the molybdenum disulfide sprayer 6 and the molybdenum disulfide curing machine 7 for detecting the temperature of the molybdenum disulfide coating; the controller is electrically connected to the thermometer and can control the curing temperature of the molybdenum disulfide curing machine 7 according to the data detected by the thermometer to effectively ensure that the curing temperature of the coating is within 180-200°C.

[0053] Furthermore, a sponge block is provided between the molybdenum disulfide spraying machine 6 and the molybdenum disulfide curing machine 7 for wiping the lower surface of the strip. The sponge block can be fixed by a corresponding bracket to wipe the lower surface of the strip when the strip passes through, thereby ensuring the cleanliness of the lower surface of the strip.

[0054] Furthermore, the present application also provides a method for lubricating the surface of a metal thin strip coil for forming a slit bushing, comprising:

[0055] Uncoiling: Uncoiling the metal coil using the uncoiling machine 1 to form a strip;

[0056] Sandblasting: conveying the strip into the sandblasting device 3, sandblasting the upper surface of the strip to form a sandblasting layer on the upper surface of the strip;

[0057] Cleaning: The strip after sandblasting is conveyed to the cleaning device 4 to clean the strip;

[0058] Drying: The cleaned strip is conveyed to the drying device 5 to dry the strip;

[0059] Spraying: conveying the dried strip into a molybdenum disulfide spraying machine 6, coating the upper surface of the strip with a molybdenum disulfide coating to form a molybdenum disulfide coating on the sandblasting layer;

[0060] Curing: The sprayed strip is conveyed into the molybdenum disulfide curing machine 7 to cure the molybdenum disulfide coating;

[0061] Rewinding: The cured strip is conveyed to the rewinder 8 for rewinding.

[0062] The continuous unwinding + sandblasting + cleaning + drying + spraying + curing + winding process of the strip can be used to complete the continuous coating of the strip, realize the efficient and orderly automatic surface lubrication coating of the entire coil, and then obtain a surface coating layer with consistent bonding force and high thickness uniformity, and can save manpower on-site in the production workshop and improve efficiency. The use of molybdenum disulfide coating and sandblasting of the strip surface before spraying can effectively improve the adhesion of the coating, which is more conducive to the subsequent process effect of the slotted bushing products when used.

[0063] The method can be specifically implemented using the above-mentioned processing device. The specific process has been described in detail above and will not be repeated here.

[0064] The above are only exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A surface treatment device for a metal thin strip coil for forming a slotted bushing, characterized in that: It includes a controller, and an unwinder, a sandblasting device, a cleaning device, a drying device, a molybdenum disulfide sprayer, a molybdenum disulfide curing machine and a winder which are sequentially arranged along the strip conveying direction and are all electrically connected to the controller; The uncoiler is used to open the metal coil to form a strip; the sandblasting device is used to sandblast the upper surface of the strip to form a sandblasting layer on the upper surface of the strip; The molybdenum disulfide spraying machine is used to apply a molybdenum disulfide coating to the upper surface of the strip to form a molybdenum disulfide coating on the sandblasting layer; The molybdenum disulfide curing machine is used to cure the molybdenum disulfide coating.

2. The surface treatment device for a metal thin strip coil for forming a slotted bushing according to claim 1, characterized in that: Calculated by weight percentage, the molybdenum disulfide coating consists of 25-30% of molybdenum disulfide, 35-55% of phenolic resin, 5-10% of lubricant and the balance of organic solvent.

3. The surface treatment device for a metal thin strip coil for forming a slotted bushing according to claim 2, characterized in that: The lubricant is composed of polytetrafluoroethylene, lead powder and graphite powder, and the weight ratio is (2-4):(2-4):1; the organic solvent is ethylene glycol ethyl ether acetate.

4. The surface treatment device for a metal thin strip coil for forming a slotted bushing according to claim 2, characterized in that: The spraying distance of the molybdenum disulfide spraying machine is 150-200 mm, the spraying pump speed is 3.0-8.0 g / min, and the temperature of the spraying chamber is 40-60° C.; the curing temperature of the molybdenum disulfide curing machine is 180-200° C.

5. The surface treatment device for a metal thin strip coil for forming a slotted bushing according to claim 1, characterized in that: A straightening wheel assembly is also provided between the uncoiler and the sandblasting device, and the straightening wheel assembly includes a plurality of upper straightening wheels arranged at intervals and a plurality of lower straightening wheels arranged at intervals, and the plurality of upper straightening wheels and the plurality of lower straightening wheels are staggered along the strip conveying direction.

6. The surface treatment device for a metal thin strip coil for forming a slotted bushing according to claim 1, characterized in that: A roughness detector is provided between the sandblasting device and the cleaning device and near the sandblasting outlet thereof, for detecting the surface roughness of the strip; the controller is electrically connected to the roughness detector, and can control the prompter to emit a prompt sound when the roughness detected by the roughness detector is less than a preset value, and can also adjust the pressure, speed and sandblasting amount of the sandblasting gun of the sandblasting device according to the data detected by the roughness detector.

7. The surface treatment device for a metal thin strip coil for forming a slotted bushing according to claim 1, characterized in that: A water-absorbing cotton strip is provided at the cleaning outlet of the cleaning device; a sponge block is also provided between the molybdenum disulfide spraying machine and the molybdenum disulfide curing machine for wiping the lower surface of the strip.

8. The surface treatment device for a metal thin strip coil for forming a slotted bushing according to claim 1, characterized in that: The drying temperature of the drying device is 120-150°C, and the speed of the strip moving is 10-20m / s; A humidity detector is provided in the drying device, and the controller is electrically connected to the humidity detector and can adjust the temperature in the drying device according to data detected by the humidity detector.

9. The surface treatment device for a metal thin strip coil for forming a slotted bushing according to claim 1, characterized in that: The molybdenum disulfide spraying machine is also connected to a molybdenum disulfide feed box, in which a stirrer is arranged; a thickness detector is also arranged in the molybdenum disulfide spraying machine for detecting the thickness of the molybdenum disulfide coating; a thermometer is also arranged between the molybdenum disulfide spraying machine and the molybdenum disulfide curing machine for detecting the temperature of the molybdenum disulfide coating; The controller is electrically connected to the agitator, the thickness detector and the thermometer, and can adjust the coating time of the molybdenum disulfide sprayer according to the data detected by the thickness detector, and can also control the curing temperature of the molybdenum disulfide curing machine according to the data detected by the thermometer.

10. A method for lubricating the surface of a metal thin strip coil for forming a slotted bushing, characterized in that: include: Uncoiling: Uncoiling a metal coil to form a strip using an uncoiling machine; Sandblasting: conveying the strip into the sandblasting device, sandblasting the upper surface of the strip to form a sandblasting layer on the upper surface of the strip; Cleaning: The strip after sandblasting is conveyed into the cleaning device to clean the strip; Drying: The cleaned strip is conveyed into the drying device to dry the strip; Spraying: conveying the dried strip into a molybdenum disulfide spraying machine, coating the upper surface of the strip with a molybdenum disulfide coating to form a molybdenum disulfide coating on the sandblasting layer; Curing: conveying the sprayed strip into a molybdenum disulfide curing machine to cure the molybdenum disulfide coating; Winding: The solidified strip is conveyed into the winder for winding.

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