Workpiece surface finish processing apparatus and workpiece surface finish processing method

Abstract

The present disclosure relates to the technical field of surface treatment, and provides a workpiece surface finish treatment device and a workpiece surface finish treatment method. The device comprises a treatment chamber, a mounting mechanism, a solvent supply system, a carrier gas system, a wind field system, a solvent recovery system and a controller. The solvent supply system can supply atomized reaction solvent to the treatment chamber. The carrier gas system can control the temperature and quantity of inert carrier gas delivered to the treatment chamber. The wind field system can generate a laminar flow field or a turbulent flow field in the treatment chamber. The solvent recovery system can cool and recover the reacted vapor solvent in the treatment chamber. The controller can regulate the working state of the mounting mechanism, the solvent supply system, the carrier gas system, the wind field system and the solvent recovery system. The method can be applied to the device, which can significantly reduce the surface roughness of 3D printed workpieces, effectively eliminate layer lines and openings on the surface of 3D printed workpieces, and improve the sealing performance and mechanical properties of the workpieces.

Description

Technical Field

[0001] This disclosure relates to the field of surface treatment technology, and in particular to a device and method for surface finish treatment of parts. Background Technology

[0002] 3D printing, also known as additive manufacturing, commonly uses three materials: polyamide (PA), thermoplastic polyurethane elastomer (TPU), and polypropylene (PP). Due to the layer-by-layer deposition modeling principle of 3D printing, the surface of polymer parts produced by 3D printing often lacks smoothness and contains micropores, making the surface quality of 3D-printed parts incomparable to that of injection-molded parts. To address this issue, the industry has tried various methods to improve the surface quality of 3D-printed parts, such as mechanical surface polishing and secondary hot pressing, but the effects of these methods have certain limitations. Summary of the Invention

[0003] This disclosure provides a surface finish treatment device and method for 3D printed parts, in order to solve the problems of low surface smoothness and micropores in 3D printed parts in related technologies.

[0004] The surface finish treatment apparatus for parts provided in this embodiment includes a treatment chamber, a mounting mechanism, a solvent supply system, a carrier gas system, an air field system, and a solvent recovery system. The mounting mechanism is disposed in the processing chamber and includes a main shaft that can rotate about a first direction and a branch shaft connected to the main shaft that can rotate about a second direction. The solvent supply system is connected to the processing chamber via an ultrasonic atomizer, and is able to supply atomized reaction solvent to the processing chamber. The carrier gas system is connected to the outlet of the ultrasonic nebulizer and can supply inert carrier gas to the processing chamber in a controlled temperature and quantity manner. The wind field system is installed in the processing chamber and can generate a laminar or turbulent wind field in the processing chamber. The solvent recovery system is connected to the processing chamber via a condenser, which can cool and recover the vapor solvent after the reaction in the processing chamber. The surface finish treatment device for the workpiece also includes a controller; The controller is electrically connected to the mounting mechanism, the solvent supply system, the carrier gas system, the air field system, and the solvent recovery system, and can respectively regulate the working status of the mounting mechanism, the solvent supply system, the carrier gas system, the air field system, and the solvent recovery system.

[0005] In one embodiment, the solvent supply system includes a storage tank, an explosion-proof diaphragm pump, and a weighing sensor. The storage tank is connected to the processing chamber via an explosion-proof diaphragm pump. The weighing sensor is located at the bottom of the storage tank; The controller is electrically connected to the explosion-proof diaphragm pump and the weighing sensor.

[0006] In one embodiment, the carrier gas system includes a gas source, a flow controller, and a preheater connected in sequence. The controller is electrically connected to the flow controller and the preheater.

[0007] In one embodiment, the airflow system includes a supply fan, a return fan, a filter, and a flow equalization plate respectively disposed in the processing chamber; The controller is electrically connected to the supply fan and the return fan.

[0008] In one embodiment, the solvent recovery system includes a collection tank, an adsorption tank, and a recovery tank; The collection trough is located at the bottom of the processing chamber; The adsorption tank is connected to the condenser via a pipeline, and activated carbon fiber is provided in the adsorption tank. The collection tank, the condenser, and the adsorption tank are respectively connected to the recovery tank via pipelines.

[0009] In one embodiment, the surface finish treatment device for the workpiece further includes a temperature control system; The temperature control system includes a heater, a cooling pipe, and a temperature sensor, which are respectively disposed in the processing chamber; The controller is electrically connected to the heater, the cooling pipe and the temperature sensor respectively.

[0010] In one embodiment, the part surface finish treatment device further includes a safety monitoring system; The safety monitoring system includes a steam concentration sensor, an oxygen concentration sensor, and a pressure sensor, which are respectively installed in the processing chamber. The controller is electrically connected to the steam concentration sensor, the oxygen concentration sensor, and the pressure sensor, respectively.

[0011] In one embodiment, the safety monitoring system further includes a liquid leakage sensor disposed at the bottom of the outer surface of the processing chamber; The controller is electrically connected to the liquid leak sensor.

[0012] In addition, this disclosure also provides a method for surface finish treatment of a workpiece, which can be applied to the above-mentioned workpiece surface finish treatment apparatus, and includes the following steps: The mounting mechanism places the workpiece to be processed into the processing chamber; The reaction solvent is converted into an aerosol with an average particle size of 1μm~10μm by ultrasonic atomization; The aerosol is delivered into the processing chamber using an inert carrier gas. The mounting mechanism is activated to cause the workpiece to revolve around the main shaft in a first direction and rotate around the branch shaft in a second direction. Turn on the air field system and form a laminar flow air field in the processing chamber to make the aerosol uniformly deposited on the surface of the part and maintain the contact time for 5 to 30 minutes; Stop the aerosol supply, switch the wind field system to turbulence mode to blow the surface of the part for 20-30 minutes to evaporate the solvent on the surface of the part and solidify the surface of the part; The condenser in the solvent recovery system is activated to recover the residual aerosol in the processing chamber. The part is then removed from the processing chamber when the aerosol concentration drops to below 10% of the lower explosive limit.

[0013] In one embodiment, when the material of the part is PA, the reaction solvent is selected from formic acid, m-cresol, trimethyl phosphate, hexafluoroisopropanol, trifluoroacetic acid or N-methylpyrrolidone; When the part material is TPU, the solvent is selected from tetrahydrofuran, N,N-dimethylformamide or N-methylpyrrolidone; When the material of the part is PP, the solvent is selected from decahydronaphthalene or xylene.

[0014] The technical solution provided in this disclosure has the following advantages compared with related technologies: The surface finish treatment apparatus provided in this disclosure includes a solvent supply system that converts the reaction solvent into micron-sized droplets via ultrasonic atomization. This allows for reaction treatment of the 3D printed part surface at room temperature and pressure, eliminating the need to heat the reaction solvent to high temperatures, thus improving safety and preventing slow thermal decomposition of the reaction solvent. This significantly enhances the effective utilization and recovery rate of the solvent reaction. The laminar flow field of the airflow system and the revolution and rotation of the mounting mechanism ensure that the atomized reaction solvent is uniformly sprayed onto all surfaces of the 3D printed part. The turbulent flow field of the airflow system and the condensation recovery of the solvent recovery system create an integrated closed-loop recovery system within the treatment chamber, maximizing the recovery of used reaction solvent and preventing pollution caused by solvent evaporation. Finally, the controller can separately regulate the operating status of the mounting mechanism, solvent supply system, carrier gas system, airflow system, and solvent recovery system, significantly improving the automation and efficiency of the surface finish treatment apparatus.

[0015] Furthermore, the surface finish treatment method for 3D printed parts provided in this embodiment can be applied to the aforementioned surface finish treatment device, significantly reducing the surface roughness of 3D printed parts (the surface roughness Ra of PA parts can be reduced from 12.5μm to below 2μm, and that of PP parts can be reduced from 15μm to below 3μm), effectively eliminating layer textures on the surface of 3D printed parts (layer textures can even be completely eliminated, achieving the surface smoothness level of injection molded parts), and reducing the porosity of openings from more than 8% to less than 0.5%, significantly improving the sealing performance and mechanical properties of the parts (tensile strength remains above 90% of the original, and elongation at break increases by 5%). Moreover, the entire processing is safe and controllable, and is suitable for industrial mass production.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0017] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0018] Figure 1 A schematic diagram of the part surface finish treatment apparatus provided in an embodiment of this disclosure is shown; Figure 2 A schematic diagram of the mounting mechanism in the part surface finish treatment apparatus provided in the embodiments of this disclosure is shown; Figure 3 A flowchart of a surface finish treatment method for a workpiece provided in an embodiment of this disclosure is shown.

[0019] The labels in the diagram are as follows: 1. Processing chamber; 2. Mounting mechanism; 21. Main shaft; 22. Support shaft; 3. Solvent supply system; 31. Ultrasonic atomizer; 32. Explosion-proof diaphragm pump; 33. Weighing sensor; 34. Storage tank; 4. Carrier gas system; 41. Gas source; 42. Pressure reducing valve; 43. Flow controller; 44. Preheater; 5. Airflow system; 51. Supply fan; 52. Return fan; 53. Filter; 54. Flow distribution plate; 6. Solvent recovery system; 61. Condenser; 62. Collection tank; 63. Adsorption tank; 64. Recovery tank; 7. Temperature control system; 71. Heater; 72. Cooling pipe; 73. Temperature sensor; 8. Safety monitoring system; 81. Steam concentration sensor; 82. Oxygen concentration sensor; 83. Pressure sensor; 84. Liquid leakage sensor. Detailed Implementation

[0020] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0021] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0022] Combination Figure 1 and Figure 2 As shown, this embodiment of the present disclosure provides a surface finish treatment device for a workpiece, which includes a treatment chamber 1, a mounting mechanism 2, a solvent supply system 3, a carrier gas system 4, an airflow system 5, and a solvent recovery system 6. The mounting mechanism 2 is disposed in the treatment chamber 1 and includes a main shaft 21 that can rotate around a first direction X1 and a branch shaft 22 connected to the main shaft 21 and capable of rotating around a second direction X2. The solvent supply system 3 is electrically connected to the treatment chamber 1 through an ultrasonic atomizer 31 and can supply atomized reaction solvent to the treatment chamber 1. The carrier gas system 4 is electrically connected to the outlet of the ultrasonic atomizer 31 and can supply inert carrier gas to the treatment chamber 1 in a controlled temperature and quantity manner. The airflow system 5 is disposed in the treatment chamber 1 and can generate a laminar flow airflow or a turbulent flow airflow in the treatment chamber 1. The solvent recovery system 6 is electrically connected to the treatment chamber 1 through a condenser 61 and can cool and recover the vapor solvent after reaction in the treatment chamber 1. The surface finish treatment device for the part also includes a controller; the controller is electrically connected to the mounting mechanism 2, the solvent supply system 3, the carrier gas system 4, the air field system 5 and the solvent recovery system 6 respectively, and can adjust the working status of the mounting mechanism 2, the solvent supply system 3, the carrier gas system 4, the air field system 5 and the solvent recovery system 6 respectively.

[0023] The surface finish treatment apparatus provided in this disclosure can be specifically applied to the surface finish treatment of 3D printed parts, but is not limited to this application. When the 3D printed part is made of polyamide (PA), the reaction solvent in the solvent supply system 3 can be formic acid, m-cresol, trimethyl phosphate, hexafluoroisopropanol, trifluoroacetic acid, or N-methylpyrrolidone. When the 3D printed part is made of thermoplastic polyurethane elastomer (TPU), the reaction solvent in the solvent supply system 3 can be tetrahydrofuran, N,N-dimethylformamide, or N-methylpyrrolidone. When the 3D printed part is made of polypropylene (PP), the reaction solvent in the solvent supply system 3 can be decahydronaphthalene or xylene.

[0024] Furthermore, the inner wall of the processing chamber 1 can be coated with a corrosion-resistant coating, and an explosion-proof observation window and a quick-opening sealing door are provided in the wall of the processing chamber 1; the mounting mechanism 2 can be configured, but is not limited to, including a main shaft 21 (vertically installed along the first direction X1) and a support shaft 22 (multi-layered horizontally installed along the second direction X2, with 3-4 shafts per layer, distributed radially). The main shaft 21 is driven by a revolution drive motor, and the support shaft 22 can be connected to the main shaft 21 through a rotation transmission gear set, so that when the main shaft 21 revolves, it can correspondingly drive the support shaft 22 to rotate.

[0025] In operation, the surface finish treatment device first places the 3D printed part to be treated on the mounting mechanism 2 inside the processing chamber 1. Then, a suitable reaction solvent is selected based on the material of the 3D printed part. The solvent supply system 3 atomizes the organic solvent into an aerosol with an average particle size of 1μm to 10μm using an ultrasonic atomizer 31 (which can be, but is not limited to, an ultrasonic frequency of 1.7MHz to 2.4MHz). The carrier gas system 4 supplies an inert carrier gas (which can be, but is not limited to, nitrogen, with a supply flow rate of 8L / min) to the outlet of the ultrasonic atomizer 31, thereby delivering the atomized aerosol into the processing chamber 1. Next, the mounting mechanism 2 is activated, causing the 3D printed part to rotate around the first direction X1 at a revolution speed of 2 to 20 rpm. The machine rotates at a speed of 5-50 rpm around the second direction X2; at the same time, the air field system 5 is turned on to form a laminar air field with a wind speed of 0.1 m / s-0.3 m / s in the processing chamber 1, so that the aerosol can be uniformly deposited on the surface of the 3D printed part and the contact time is maintained for 5-30 minutes; then the solvent supply system 3 stops the aerosol supply, and the air field system 5 switches the air field to a turbulent air field, blowing the 3D printed part with an airflow of 1 m / s-5 m / s for 20-30 minutes, so that the surface solvent of the 3D printed part evaporates and the surface is blown and cured; finally, the solvent recovery system 6 recovers the residual solvent vapor in the processing chamber 1 through the condenser 61, and when the concentration of organic solvent vapor in the processing chamber 1 drops to less than 10% of the lower explosive limit, the chamber door can be opened and the 3D printed part can be taken out.

[0026] The surface finish treatment apparatus provided in this embodiment includes a solvent supply system 3 that can convert the reaction solvent into micron-sized liquid droplets through ultrasonic atomization. This allows the reaction solvent to be applied to the surface of the 3D printed part at room temperature and pressure, eliminating the need to heat the reaction solvent to high temperatures, thus improving safety and preventing slow thermal decomposition of the reaction solvent. This also enhances the effective utilization and recovery rate of the solvent reaction. The laminar flow of the airflow system 5 and the revolution and rotation of the mounting mechanism 2 ensure that the atomized reaction solvent is evenly sprayed onto the surface of the 3D printed part. The turbulent flow of the airflow system 5 and the condensation recovery of the solvent recovery system 6 enable the processing chamber 1 to form an integrated closed-loop recovery system, maximizing the recovery of the used reaction solvent and preventing pollution caused by solvent evaporation. Finally, the working status of the mounting mechanism 2, solvent supply system 3, carrier gas system 4, airflow system 5, and solvent recovery system 6 can be controlled by a controller (which may be, but is not limited to, a PLC), significantly improving the automation and efficiency of the surface finish treatment apparatus.

[0027] In one embodiment, the solvent supply system 3 includes a storage tank 34, an explosion-proof diaphragm pump 32, and a weighing sensor 33: the storage tank 34 is electrically connected to the processing chamber 1 through the explosion-proof diaphragm pump 32; the weighing sensor 33 is disposed at the bottom of the storage tank 34; and the controller is electrically connected to the explosion-proof diaphragm pump 32 and the weighing sensor 33.

[0028] Specifically, in combination Figure 1 In further detail, the controller is electrically connected to the explosion-proof diaphragm pump 32 and the weighing sensor 33 in the solvent supply system 3. In this way, the controller can detect the remaining amount and consumption of the reaction solvent in the storage tank 34 in real time through the weighing sensor 33, and can electrically control the start and stop status of the explosion-proof diaphragm pump 32, thereby automatically controlling the supply status of the reaction solvent in the solvent supply system 3.

[0029] In one embodiment, the carrier gas system 4 includes a gas source 41, a pressure reducing valve 42, a flow controller 43, and a preheater 44 connected in sequence; wherein the controller is electrically connected to the flow controller 43 and the preheater 44.

[0030] Specifically, in combination Figure 1 To elaborate further, the pressure reducing valve 42 in the carrier gas system 4 is used to regulate the delivery pressure of the inert carrier gas, the flow controller 43 is used to control the delivery flow rate of the inert carrier gas, and the preheater 44 is used to control the temperature of the inert carrier gas. Furthermore, both the flow controller 43 and the preheater 44 are electrically connected to the controller, thus enabling automated control of the inert carrier gas supply.

[0031] In one embodiment, the air field system 5 includes a supply fan 51, a return fan 52, a filter 53, and a flow equalization plate 54 respectively disposed in the processing chamber 1; the controller is electrically connected to the supply fan 51 and the return fan 52.

[0032] Specifically, in combination Figure 1 In further detail, the filter 53 and the flow equalization plate 54 in the air field system 5 can filter and equalize the air field in the processing chamber 1 respectively. Moreover, the controller is electrically connected to the supply fan 51 and the return fan 52, so that the working state of the supply fan 51 and the return fan 52 can be controlled by the controller respectively, thereby enabling the air field system 5 to generate laminar flow or turbulent flow in the processing chamber 1 respectively.

[0033] In one embodiment, the solvent recovery system 6 includes a collection tank 62, an adsorption tank 63, and a recovery tank 64; the collection tank 62 is located at the bottom of the processing chamber 1; the adsorption tank 63 is connected to the condenser 61 via a pipeline, and activated carbon fiber is disposed in the adsorption tank 63; the collection tank 62, the condenser 61, and the adsorption tank 63 are respectively connected to the recovery tank 64 via pipelines.

[0034] Specifically, in combination Figure 1 In further detail, the collection tank 62 can be angled downwards and located at the bottom of the processing chamber 1, and is connected to the recovery tank 64 via a pipeline. This allows the collected reaction solvent in the collection tank 62 to flow back into the recovery tank 64. Additionally, the adsorption tank 63 is connected to the condenser 61 via a pipeline, and activated carbon fibers are installed in the adsorption tank 63. This allows the reaction solvent liquefied by condensation in the condenser 61 to enter the adsorption tank 63, be adsorbed and filtered by the activated carbon fibers, and then flow back to the recovery tank 64 for collection.

[0035] The solvent recovery system 6 described above can collect more than 90% of the reaction solvent, which can be reused after simple treatment, thus reducing costs.

[0036] In one embodiment, the surface finish treatment device for the workpiece further includes a temperature control system 7; the temperature control system 7 includes a heater 71, a cooling pipe 72 and a temperature sensor 73 respectively disposed in the processing chamber 1; the controller is electrically connected to the heater 71, the cooling pipe 72 and the temperature sensor 73 respectively.

[0037] Specifically, in combination Figure 1In further detail, the heater 71 and cooling pipe 72 in the temperature control system 7 can be respectively installed in the inner wall of the processing chamber 1 to heat up and cool down the processing chamber 1. The controller is electrically connected to the heater 71, cooling pipe 72, and temperature sensor 73, respectively. This allows the controller to adjust the operating state of the heater 71 or cooling pipe 72 based on the temperature information detected by the temperature sensor 73, maintaining the internal temperature of the processing chamber 1 at the optimal reaction processing temperature (e.g., but not limited to 55°C).

[0038] In one embodiment, the surface finish treatment device for the workpiece further includes a safety monitoring system 8; the safety monitoring system 8 includes a steam concentration sensor 81, an oxygen concentration sensor 82 and a pressure sensor 83 respectively disposed in the processing chamber 1; the controller is electrically connected to the steam concentration sensor 81, the oxygen concentration sensor 82 and the pressure sensor 83 respectively.

[0039] Specifically, in combination Figure 1 In further detail, the steam concentration sensor 81, oxygen concentration sensor 82, and pressure sensor 83 in the safety monitoring system 8 can be used to detect the steam concentration, oxygen concentration, and pressure of the reaction solution in the processing chamber 1 in real time, and feed the detection results back to the controller in real time. In this way, the controller can judge the safety situation in the processing chamber 1 according to the preset threshold, and ensure that the entire processing reaction process is safe and controllable.

[0040] For example, when the vapor concentration sensor 81 detects that the concentration has reached 25% of the lower explosive limit, the controller can stop the ultrasonic atomizer 31 and start the return fan 52 at maximum power for exhaust.

[0041] In one embodiment, the safety monitoring system 8 further includes a liquid leakage sensor 84 disposed at the bottom outside the processing chamber 1; the controller is electrically connected to the liquid leakage sensor 84.

[0042] Specifically, in combination Figure 1 In further detail, the safety monitoring system 8 also includes a liquid leakage sensor 84 located at the bottom outside the processing chamber 1, and the controller is electrically connected to the liquid leakage sensor 84. In this way, the liquid leakage sensor 84 can feed back the information of whether it detects leakage to the controller, so that the controller can know about the leakage problem as soon as possible and issue a leakage alarm immediately, thereby further improving the safety of the surface finish treatment device.

[0043] In addition, this disclosure also provides a method for surface finish treatment of a workpiece, which can be applied to the above-mentioned workpiece surface finish treatment apparatus, including the following steps: The mounting mechanism 2 places the workpiece to be processed in the processing chamber 1; The reaction solvent is converted into an aerosol with an average particle size of 1μm~10μm by ultrasonic atomization; The aerosol is delivered into the processing chamber 1 using an inert carrier gas; Start the mounting mechanism 2 to make the workpiece revolve around the first direction with the main shaft 21 and rotate around the second direction with the support shaft 22; Turn on the air field system 5 and form a laminar flow air field in the processing chamber 1 to make the aerosol uniformly deposited on the surface of the workpiece and maintain the contact time for 5 to 30 minutes; Stop the aerosol supply, switch the wind field system 5 to turbulence mode to blow the surface of the part for 20-30 minutes to evaporate the solvent on the surface of the part and to solidify the surface of the part; The condenser 61 in the solvent recovery system 6 is activated to recover the residual aerosol in the processing chamber 1. When the aerosol concentration drops to below 10% of the lower explosive limit, the part is removed from the processing chamber 1.

[0044] Specifically, in combination Figure 3 In further detail, this surface finish treatment method can be applied to the aforementioned surface finish treatment device, significantly reducing the surface roughness of 3D printed parts (the surface roughness Ra of PA parts can be reduced from 12.5μm to below 2μm, and that of PP parts from 15μm to below 3μm). It effectively eliminates layer textures and openings on the surface of 3D printed parts (layer textures can even be completely eliminated, achieving the surface smoothness level of injection molded parts). The porosity of openings can be reduced from over 8% to below 0.5%, significantly improving the sealing performance and mechanical properties of the parts (tensile strength remains above 90% of the original, and elongation at break increases by 5%). Moreover, the entire process is safe and controllable, making it suitable for mass industrial production.

[0045] In one embodiment, when the material of the part is PA, the reaction solvent is selected from formic acid, m-cresol, trimethyl phosphate, hexafluoroisopropanol, trifluoroacetic acid or N-methylpyrrolidone; When the part material is TPU, the reaction solvent is selected from tetrahydrofuran, N,N-dimethylformamide or N-methylpyrrolidone; When the part material is PP, the reaction solvent is selected from decahydronaphthalene or xylene.

[0046] Specifically, when the material of the part is PA, the reaction solvent is selected from formic acid, m-cresol, trimethyl phosphate, hexafluoroisopropanol, trifluoroacetic acid or N-methylpyrrolidone. At this time, the reaction temperature can be set at 50℃~60℃ and the reaction time can be set at 10min~15min. When the part material is TPU, the reaction solvent is selected from tetrahydrofuran, N,N-dimethylformamide or N-methylpyrrolidone. The reaction temperature can be set at 35℃~45℃ and the reaction time can be set at 5min~10min. When the material of the part is PP, the reaction solvent is selected from decahydronaphthalene or xylene. The reaction temperature can be set at 130℃~150℃ and the reaction time can be set at 15min~25min.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A device for surface finish treatment of manufactured parts, characterized in that, include: Processing chamber (1); The mounting mechanism (2) is disposed in the processing chamber (1) and includes a main shaft (21) that can rotate about a first direction and a branch shaft (22) connected to the main shaft (21) and capable of rotating about a second direction. The solvent supply system (3) is connected to the processing chamber (1) via an ultrasonic atomizer (31) and is able to supply atomized reaction solvent to the processing chamber (1); The carrier gas system (4) is connected to the outlet of the ultrasonic atomizer (31) and can supply inert carrier gas to the processing chamber (1) in a controlled temperature and quantity manner. The wind field system (5) is installed in the processing chamber (1) and can generate a laminar or turbulent wind field in the processing chamber (1); The solvent recovery system (6) is connected to the processing chamber (1) via a condenser (61) and is able to cool and recover the vapor solvent after the reaction in the processing chamber (1). The surface finish treatment device for the workpiece also includes a controller; The controller is electrically connected to the mounting mechanism (2), the solvent supply system (3), the carrier gas system (4), the air field system (5) and the solvent recovery system (6) respectively, and can respectively regulate the working status of the mounting mechanism (2), the solvent supply system (3), the carrier gas system (4), the air field system (5) and the solvent recovery system (6).

2. The surface finish treatment apparatus for manufactured parts according to claim 1, characterized in that, The solvent supply system (3) includes a storage tank (34), an explosion-proof diaphragm pump (32), and a weighing sensor (33): The storage tank (34) is connected to the processing chamber (1) via an explosion-proof diaphragm pump (32); The weighing sensor (33) is disposed at the bottom of the storage tank (34); The controller is electrically connected to the explosion-proof diaphragm pump (32) and the weighing sensor (33).

3. The surface finish treatment apparatus for workpieces according to claim 1, characterized in that, The carrier gas system (4) includes a gas source (41), a pressure reducing valve (42), a flow controller (43), and a preheater (44) connected in sequence. The controller is electrically connected to the flow controller (43) and the preheater (44).

4. The surface finish treatment apparatus for workpieces according to claim 1, characterized in that, The wind farm system (5) includes a blower (51), a return air fan (52), a filter (53) and a flow equalization plate (54) respectively installed in the processing chamber (1); The controller is electrically connected to the blower (51) and the return blower (52).

5. The surface finish treatment apparatus for workpieces according to claim 1, characterized in that, The solvent recovery system (6) includes a collection tank (62), an adsorption tank (63), and a recovery tank (64). The collection trough (62) is located at the bottom of the processing chamber (1); The adsorption tank (63) is connected to the condenser (61) through a pipeline, and activated carbon fiber is provided in the adsorption tank (63). The collection tank (62), the condenser (61) and the adsorption tank (63) are respectively connected to the recovery tank (64) through pipelines.

6. The surface finish treatment apparatus for manufactured parts according to claim 1, characterized in that, The surface finish treatment device for the workpiece also includes a temperature control system (7). The temperature control system (7) includes a heater (71), a cooling pipe (72) and a temperature sensor (73) respectively disposed in the processing chamber (1). The controller is electrically connected to the heater (71), the cooling pipe (72) and the temperature sensor (73), respectively.

7. The surface finish treatment apparatus for workpieces according to claim 1, characterized in that, The surface finish treatment device for the workpiece also includes a safety monitoring system (8). The safety monitoring system (8) includes a steam concentration sensor (81), an oxygen concentration sensor (82), and a pressure sensor (83) respectively installed in the processing chamber (1). The controller is electrically connected to the steam concentration sensor (81), the oxygen concentration sensor (82), and the pressure sensor (83), respectively.

8. The surface finish treatment apparatus for workpieces according to claim 7, characterized in that, The safety monitoring system (8) also includes a liquid leakage sensor (84) located at the bottom outside the processing chamber (1). The controller is electrically connected to the liquid leak sensor (84).

9. A method for surface finish treatment of a workpiece, applicable to the surface finish treatment apparatus described in any one of claims 1 to 8, characterized in that, Includes the following steps: The mounting mechanism (2) places the workpiece to be processed in the processing chamber (1); The reaction solvent is converted into an aerosol with an average particle size of 1μm~10μm by ultrasonic atomization; The aerosol is delivered into the processing chamber (1) by an inert carrier gas. The mounting mechanism (2) is activated to make the workpiece revolve around the first direction with the main shaft (21) and rotate around the second direction with the branch shaft (22); Turn on the air field system (5) and form a laminar flow air field in the processing chamber (1) so that the aerosol is uniformly deposited on the surface of the workpiece and the contact time is maintained for 5 to 30 minutes; Stop the aerosol supply, switch the wind field system (5) to turbulence mode to blow the surface of the part for 20-30 minutes to evaporate the solvent on the surface of the part and solidify the surface of the part; The condenser (61) in the solvent recovery system (6) is activated to recover the residual aerosol in the processing chamber (1). When the aerosol concentration drops to below 10% of the lower explosive limit, the part is taken out from the processing chamber (1).

10. The method for surface finish treatment of a workpiece according to claim 9, characterized in that, When the material of the part is PA, the reaction solvent is selected from formic acid, m-cresol, trimethyl phosphate, hexafluoroisopropanol, trifluoroacetic acid or N-methylpyrrolidone; When the part material is TPU, the reaction solvent is selected from tetrahydrofuran, N,N-dimethylformamide or N-methylpyrrolidone; When the part material is PP, the reaction solvent is selected from decahydronaphthalene or xylene.

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