A workpiece surface treatment system

Abstract

This invention relates to the field of workpiece surface treatment technology, and in particular to a workpiece surface treatment system. A continuous, automated processing path is formed by combining a drive unit, a fixture, a wet shot blasting unit, a cleaning unit, a drying unit, and a filtration unit. The wet shot blasting unit utilizes a mixture of liquid and shot for spraying, effectively suppressing dust, reducing impact damage to the workpiece, and avoiding the hazards of acid pickling. Cleaning removes residual contaminants, and drying prevents water stains and corrosion. The filtration unit separates the shot, liquid, and magnetic impurities, enabling the recycling of shot and liquid and reducing costs. The drive unit moves the fixture sequentially through each station, achieving continuous operation and improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of workpiece surface treatment technology, and in particular to a workpiece surface treatment system. Background Technology

[0002] For thermoformed parts such as A-pillars, B-pillars, wheel rims, and wheel spokes of automobiles, surface rust removal treatment is required before leaving the factory.

[0003] In existing technologies, rust removal of hot-formed parts is mostly achieved through pickling or dry shot blasting. While pickling can effectively remove rust from the surface of hot-formed parts, it is not environmentally friendly and poses certain health risks to operators. On the other hand, dry shot blasting results in severe dust pollution in the working environment, and the shot material can easily damage the surface of the hot-formed parts. Summary of the Invention

[0004] (i) The problem to be solved by the present invention is that the existing rust removal of thermoformed parts is mostly done by pickling or dry shot blasting, which is not environmentally friendly and dry shot blasting is easy to damage the surface of thermoformed parts.

[0005] (II) Technical Solution To solve the above-mentioned technical problems, the present invention provides a workpiece surface treatment system, the workpiece surface treatment system comprising: a driving device, a workpiece surface treatment device, a filtering device, a drying device, and a hanger; The workpiece surface treatment device and the drying device are arranged sequentially along the processing path of the workpiece; the workpiece surface treatment device includes a wet shot blasting device and a cleaning device connected in series; the wet shot blasting device is used to wet shot blast the workpiece, the cleaning device is used to clean the workpiece, and the drying device is used to remove residual adhering liquid from the surface of the workpiece. The driving device includes a driving mechanism and a transmission mechanism. The hanger is connected to the transmission mechanism, and the workpiece can be suspended on the hanger. The driving mechanism is connected to the transmission mechanism and drives the transmission mechanism to move the hanger sequentially through the workpiece surface treatment device and the drying device. The filtration device is used to receive slurry from the workpiece surface treatment device and the adhering liquid from the drying device. The slurry and the adhering liquid are mixed in the filtration device, and the pellets and magnetic impurities in the slurry are separated from the adhering liquid and the medium liquid in the slurry.

[0006] Optionally, the workpiece surface treatment apparatus further includes a pre-cleaning device; the pre-cleaning device is used to pre-clean the surface of the workpiece; the pre-cleaning device, the wet shot blasting device, and the cleaning device are arranged in series along the processing path of the workpiece.

[0007] Optionally, the wet shot blasting device includes a main housing and a turbine unit; The main housing is provided with a processing channel, and the transmission mechanism can drive the hanger to pass through the processing channel; the turbine unit is installed on the main housing, and the spray direction of the working fluid of the turbine unit is directed towards the processing channel; Multiple wet shot blasting devices are configured, and all wet shot blasting devices are arranged sequentially along the processing path of the workpiece. The main chambers of two adjacent wet shot blasting devices are connected by a connecting box. Multiple turbine units are arranged on each main chamber, and the spray direction of the working fluid of each turbine unit is different. The turbine units on the same main chamber are arranged in pairs, and the working fluids sprayed by the two turbine units in the same pair can converge. Alternatively, multiple turbine units are arranged on the main chamber, and the spray direction of the working fluid of each turbine unit is different. The turbine units are arranged in pairs, and the working fluids sprayed by the two turbine units in the same pair can converge.

[0008] Optionally, the projectile direction of both turbine units in the same pair is either diagonally upward or diagonally downward.

[0009] Optionally, the transmission mechanism has a closed-loop structure, and the transmission mechanism has a first side and a second side; the workpiece surface treatment device is located on the first side of the transmission mechanism, and the drying device is located on the second side of the transmission mechanism.

[0010] Optional features also include a draining device; The draining device is disposed between the workpiece surface treatment device and the drying device; the draining device includes a draining tank and a conveying pump, and the draining tank is connected to the filtering device through the conveying pump.

[0011] Optionally, the filtration device includes: a sedimentation tank, a magnetic separation device, and a filtrate tank; The settling tank is used to receive the slurry from the workpiece surface treatment device and the adhering liquid from the drying device, and the pellets in the slurry can settle in the settling tank. The sedimentation tank is provided with an overflow port at the top, which is positioned higher than the liquid inlet of the magnetic separation device. The overflow port is connected to the liquid inlet of the magnetic separation device. The medium liquid, the adhering liquid, and the magnetic impurities enter the magnetic separation device through the overflow port and the liquid inlet of the magnetic separation device. The magnetic separation device is used to separate the medium liquid and the adhering liquid from the magnetic impurities. The inlet of the filtrate tank is connected to the outlet of the magnetic separation device. The medium liquid and the adhering liquid after separation from the magnetic impurities enter the filtrate tank through the outlet of the magnetic separation device and the inlet of the filtrate tank for storage, and are used to prepare the working fluid required by the workpiece surface treatment device.

[0012] Optionally, the lower end of the main tank is fixedly connected to the upper end of the sedimentation tank.

[0013] Optionally, the drying device includes: a drying chamber, a fan, and an air knife; The drying chamber has an inlet at one end and an outlet at the other end; the top and bottom of the drying chamber are provided with slides for limiting the upper and lower ends of the hanger; multiple air knives are configured, each air knife is vertically arranged inside the drying chamber, and each air knife is located on both sides of the extension direction of the slide; the fan is connected to the air knife and is used to supply air to the air knife.

[0014] Optionally, the hanger includes: a vertical bar, a horizontal bar, a hook, and a connecting plate; The upper end of the vertical rod is detachably connected to the connecting plate, which is used to connect to the driving device; the middle part of the horizontal rod is detachably connected to the vertical rod, and the position of the horizontal rod on the vertical rod is adjustable; the hook is used to suspend the workpiece, and multiple hooks are configured, which are installed on the horizontal rod, and the position of each hook on the horizontal rod is adjustable.

[0015] The beneficial effects of this invention are: This invention provides a workpiece surface treatment system, comprising: a driving device, a workpiece surface treatment device, a filtering device, a drying device, and a hanger; the workpiece surface treatment device and the drying device are arranged sequentially along the workpiece processing path; the workpiece surface treatment device includes a wet shot blasting device and a cleaning device connected in series; the wet shot blasting device is used for wet shot blasting the workpiece, the cleaning device is used for cleaning the workpiece, and the drying device is used for removing residual adhering liquid from the workpiece surface; the driving device includes a driving mechanism and a transmission mechanism, the hanger is connected to the transmission mechanism, and the workpiece can be suspended on the hanger; the driving mechanism is connected to the transmission mechanism and drives the transmission mechanism to drive the hanger to pass sequentially through the workpiece surface treatment device and the drying device; the filtering device is used to receive the slurry from the workpiece surface treatment device and the adhering liquid from the drying device, the slurry and the adhering liquid are mixed in the filtering device, and the shot and magnetic impurities in the slurry are separated from the adhering liquid and the medium liquid in the slurry.

[0016] A continuous, automated processing path is formed by combining a drive unit, a mounting fixture, a wet shot blasting unit, a cleaning unit, a drying unit, and a filtration unit. The wet shot blasting unit utilizes a mixed working fluid of medium and shot material for spraying, effectively suppressing dust generation and significantly improving the working environment. Simultaneously, the buffering effect of the liquid reduces impact damage from the shot material to the surface of thermoformed parts, while also avoiding the environmental risks and health hazards associated with acid pickling. The cleaning unit removes dirt and residual liquid from the workpiece surface after shot blasting, while the drying unit thoroughly removes surface adhering liquid, preventing water stains or rust regeneration. The filtration unit separates the shot material and magnetic impurities in the used slurry from the adhering liquid and the medium liquid in the slurry, enabling the recycling of shot material, medium liquid, and adhering liquid, thus reducing operating costs. The drive unit moves the mounting fixture sequentially through each station, achieving continuous operation and improving production efficiency. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the workpiece surface treatment system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of a wet shot blasting device. Figure 3 This is a schematic diagram of the structure of two wet shot blasting devices combined with two sedimentation tanks; Figure 4 A schematic diagram of the structure of two wet shot blasting devices and two filtration devices in combination; Figure 5 A side view of two wet shot blasting units in conjunction with two filtration units; Figure 6 This is a schematic diagram of the sedimentation tank. Figure 7 This is a schematic diagram of the drying device. Figure 8 This is a cross-sectional view of the drying device; Figure 9 This is a structural diagram of the hanging fixture; Figure 10 A 3D diagram of the hanging fixture; Figure 11 A schematic diagram of the crossbar and hook; Figure 12 This is a structural diagram of the protective frame.

[0019] Icons: 100 - Drive unit; 110 - Drive mechanism; 120 - Transmission mechanism; 200-Workpiece surface treatment device; 210-Wet shot blasting device; 211-Main housing; 212-Turbine unit; 213-Air extraction mechanism; 220-Cleaning device; 230-Pre-cleaning device; 300 - Filtration device; 310 - Sedimentation tank; 311 - Overflow port; 312 - Filter screen; 313 - Inclined plate; 314 - Support; 320 - Magnetic separation device; 330 - Filtrate tank; 400 - Drying device; 410 - Drying box; 420 - Fan; 430 - Air knife; 440 - Support frame; 500-Hanging fixture; 510-Vertical rod; 511-Insertion tube; 520-Horizontal rod; 521-Pin; 530-Hook; 540-Connecting plate; 550-Guard frame. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] like Figures 1 to 9 As shown, this embodiment of the invention provides a workpiece surface treatment system for treating the surface of workpieces. The workpiece can be an A-pillar or B-pillar of an automobile, or a fender, wheel rim, spoke, or other part. The workpiece surface treatment system includes: a drive unit 100, a workpiece surface treatment device 200, a filter device 300, a drying device 400, and a hanger 500.

[0028] The workpiece surface treatment device 200 and the drying device 400 are arranged sequentially along the workpiece processing path. The workpiece surface treatment device 200 includes a wet shot blasting device 210 and a cleaning device 220. The wet shot blasting device 210 is used to wet shot blast the workpiece to remove the oxide scale on the workpiece surface. The cleaning device 220 is used to clean the workpiece after wet shot blasting to remove the oxide scale adhering to the workpiece surface. The drying device 400 removes the residual adhering liquid on the workpiece surface by blowing it. Here, the adhering liquid mainly comes from the cleaning device 220, and the adhering liquid is usually water, or a mixture of water and cleaning media or rust removal media. The drive device 100 includes a drive mechanism 110 and a transmission mechanism 120. The drive mechanism 110 and the transmission mechanism 120 are connected by a drive mechanism. The transmission mechanism 120 is a closed-loop structure and can be a chain or an accumulation chain set on a track. When the transmission mechanism 120 is an accumulation chain, it is convenient for the operator to remove the cleaned workpiece from the hanger 500. The drive mechanism 110 includes a motor, sprockets, and other structures, used to drive the transmission mechanism 120. The hanger 500 is fixedly connected to the drive mechanism 110. The drive mechanism 110 drives the transmission mechanism 120, thereby causing the hanger 500 to pass sequentially through the workpiece surface treatment device 200 and the cleaning device 220. The filter device 300 is used to receive the slurry from the workpiece surface treatment device 200 and the adhering liquid from the drying device 400. The slurry includes shot, medium liquid, and magnetic impurities. The magnetic impurities are the oxide scale on the workpiece surface. The shot is generally steel shot. The steel shot and the medium liquid are mixed to form the working fluid required by the workpiece surface treatment device 200. The medium liquid is usually water, or contains a certain amount of cleaning or rust removal medium. In this embodiment, the components of the medium liquid and the adhering liquid are basically the same, so that both the medium liquid and the adhering liquid can be recycled and reused to prepare the working fluid. The filter device 300 can separate the shot and magnetic impurities from the medium liquid and the adhering liquid. The shot can be recycled. The medium liquid and the adhering liquid have basically the same composition. The medium liquid and the adhering liquid can also be recycled and mixed with the shot to prepare the working liquid required by the surface treatment device. In addition, the medium liquid and the adhering liquid can also be transported to the cleaning device 220 and the pre-cleaning device 230 for use.

[0029] The workpiece surface treatment system provided in this embodiment forms a continuous and automated processing path through the combination of a drive unit 100, a hanger 500, a wet shot blasting unit 210, a cleaning unit 220, a drying unit 400, and a filtering unit 300. The wet shot blasting unit 210 utilizes a mixed working fluid of medium liquid and shot material for spraying, effectively suppressing dust generation and significantly improving the working environment. Simultaneously, the buffering effect of the liquid reduces the impact damage of the shot material to the surface of the thermoformed parts, while also avoiding the environmental risks and health hazards associated with pickling. The cleaning unit 220 removes dirt and residual liquid remaining on the workpiece surface after shot blasting, while the drying unit 400 thoroughly removes surface adhering liquid, preventing water stains or rust regeneration. The filtering unit 300 separates the shot material and magnetic impurities in the used slurry from the adhering liquid and the medium liquid in the slurry, enabling the recycling of shot material, medium liquid, and adhering liquid, thus reducing operating costs. The drive unit 100 drives the hanger 500 sequentially through each station, thereby achieving continuous operation and improving production efficiency.

[0030] In some alternative implementations, such as Figure 1 The workpiece surface treatment apparatus 200 further includes a pre-cleaning device 230. The pre-cleaning device 230 is used to pre-clean the surface of the workpiece to remove oil and other impurities. The pre-cleaning device 230, the wet shot blasting device 210, and the cleaning device 220 are connected in series along the workpiece processing path.

[0031] By adding a pre-cleaning device 230 before the wet shot blasting device 210, the workpieces before entering the wet shot blasting device 210 can be pre-cleaned to remove large particles of dirt, oil, or loose oxide scale adhering to the surface of the workpieces. This reduces the burden on the wet shot blasting device 210 and extends the service life of the shot. At the same time, the surface of the workpieces after pre-cleaning is more uniform, which is conducive to obtaining a more consistent and controllable surface roughness and rust removal effect during subsequent wet shot blasting, thereby improving the overall processing quality.

[0032] In optional embodiments of the present invention, such as Figures 1 to 4 As shown, the wet shot blasting device 210 includes a main housing 211 and a turbine unit 212. A processing channel is provided inside the main housing 211, and the transmission mechanism 120 can drive the hanger 500 through the processing channel. The turbine unit 212 is mounted on the main housing 211, and the working fluid spray direction of the turbine unit 212 is directed towards the processing channel to ensure that the working fluid can be accurately sprayed onto the workpiece surface. The enclosed housing structure effectively prevents slurry from splashing into the external environment, further improving the hygiene conditions of the workplace, while the concentrated spraying also improves descaling efficiency.

[0033] Optionally, when the cleaning device 220 includes a cleaning chamber and the workpiece surface treatment device 200 further includes a pre-cleaning device 230, the pre-cleaning device 230 includes a pre-cleaning chamber. Processing channels are also provided inside the pre-cleaning chamber and the cleaning chamber. The pre-cleaning chamber, the main chamber 211, and the cleaning chamber are connected sequentially, and adjacent chambers can be separated by flexible baffles to achieve isolation between adjacent chambers. Slides are provided at the top and bottom of the pre-cleaning chamber, the main chamber 211, and the cleaning chamber. The top slide is used to limit the upper end of the hanger 500, and the bottom slide is used to limit the lower end of the hanger 500, thereby preventing the hanger 500 from swinging in the processing channels of each chamber and affecting the processing effect.

[0034] In some alternative implementations, such as Figure 1 As shown, multiple wet shot blasting devices 210 are configured, each arranged sequentially along the workpiece processing path. Adjacent main chambers 211 of the shot blasting devices are connected by a connecting box, and a flexible baffle can also be installed between the main chamber 211 and the connecting box for isolation. Each main chamber 211 is equipped with multiple turbine units 212, and the working fluid spraying direction of each turbine unit 212 is different to achieve full coverage of the workpiece surface and avoid any untreated dead corners. The turbine units 212 on the same main chamber 211 are arranged in pairs, with the two turbine units 212 of the same pair located on opposite sides of the processing channel. The working fluid sprayed by the two turbine units 212 of the same pair can converge, thereby preventing workpiece deflection. By setting multiple wet shot blasting devices 210, the surface treatment effect of the workpiece can be further improved. Figure 3 and Figure 4 As shown, two wet shot blasting devices 210 are provided, and each wet shot blasting device 210 has four turbine units 212 installed on its main housing 211.

[0035] In some alternative implementations, such as Figures 1 to 4 As shown, multiple turbine units 212 are installed on the main housing 211, and the spraying direction of the working fluid of each turbine unit 212 is different. The turbine units 212 are arranged in pairs, and the working fluid sprayed by the two turbine units 212 in the same pair can converge, thereby improving the processing effect while avoiding the workpiece deflection.

[0036] Preferably, in this embodiment, the projectile direction of the two turbine units 212 in the same pair is obliquely upward or obliquely downward. This ensures that there are no dead corners on the surface of the workpiece while minimizing the possibility of workpiece deflection.

[0037] In other embodiments, the two turbine units 212 of the same pair project in oblique upward and oblique downward directions. Although this can also suppress workpiece deflection, it is less effective for some lighter or thinner workpieces.

[0038] Optionally, the main housing 211 is provided with an air extraction mechanism 213. The air extraction mechanism 213 is connected to the interior of the main housing 211 and is used to extract the air inside the main housing 211, so as to create a negative pressure inside the main housing 211, thereby reducing the splashing of solids and liquids inside the main housing 211 to the outside of the main housing 211.

[0039] In optional embodiments of the present invention, such as Figure 1 As shown, the transmission mechanism 120 has a closed-loop structure. The transmission mechanism 120 has a first side and a second side, which are arranged opposite to each other. Both the first and second sides are straight edges. The ends of the first and second sides are transitioned by an arc or a short straight edge (shorter than the length of the first and second sides). The workpiece surface treatment device 200 is located on the first side of the transmission mechanism 120, and the drying device 400 is located on the second side of the transmission mechanism 120. This allows the workpiece sufficient time to drain, reducing residual liquid on the workpiece surface and reducing the pressure of the drying device 400 and the number of fans 420. This saves both the length of the drying device 400 and energy.

[0040] In an optional embodiment of the present invention, the workpiece surface treatment system further includes a draining device; the draining device is disposed between the workpiece surface treatment device 200 and the drying device 400, preferably located on the arc-shaped edge or short straight edge of the first side and the second side; the draining device includes a draining trough and a conveying pump, the draining trough is located below the transmission mechanism 120 to receive residual adhering liquid on the workpiece surface, and the draining trough is connected to the filter device 300 through the conveying pump.

[0041] In optional embodiments of the present invention, such as Figures 3 to 6As shown, the filtration device 300 includes: a sedimentation tank 310, a magnetic separation device 320, and a filtrate tank 330. The sedimentation tank 310 receives the slurry from the workpiece surface treatment device 200 and the adhering liquid from the drying device 400. The slurry contains shot, magnetic impurities, and a medium liquid. The shot is generally steel grit used in wet shot blasting. The magnetic impurities are magnetic impurities such as oxide scale on the workpiece surface. After the slurry and adhering liquid enter the sedimentation tank 310, the shot can settle in the sedimentation tank 310. An overflow port 311 is provided at the top of the sedimentation tank 310. The overflow port 311 is higher than the liquid inlet of the magnetic separation device 320. The overflow port 311 is connected to the liquid inlet of the magnetic separation device 320. After the slurry and adhering liquid enter the sedimentation tank 310, the shot in the slurry settles, and the medium liquid, adhering liquid, and magnetic impurities enter the magnetic separation device 320 through the overflow port 311 and the liquid inlet of the magnetic separation device 320. The magnetic separation device 320 is used to separate the liquid and the magnetic impurities. The inlet of the filtrate tank 330 is connected to the outlet of the magnetic separation device 320. The liquid separated from the magnetic impurities enters the filtrate tank 330 through the outlet of the magnetic separation device 320 and the inlet of the filtrate tank 330 and is stored in the filtrate tank 330. It is used to prepare the working fluid required by the workpiece surface treatment device 200, which is a mixture of shot and water.

[0042] The filtration device 300 provided in this embodiment utilizes the gravity settling effect of the sedimentation tank 310 to allow the denser shot in the slurry to naturally settle to the bottom, thereby achieving preliminary separation of the shot from the supernatant containing magnetic impurities and liquid. The overflow port 311 at the top of the sedimentation tank 310 is higher than the inlet of the magnetic separator 320, allowing the liquid containing magnetic impurities to automatically overflow into the magnetic separator 320 using the liquid level difference, eliminating the need for additional power supply, simplifying the system structure and reducing energy consumption. The magnetic separator 320 specifically adsorbs and separates magnetic impurities (such as iron filings and oxide powder peeled from the surface of thermoformed parts) from the liquid, obtaining a relatively pure liquid. Finally, the purified liquid is stored in the filtrate tank 330 and can be used to reconstitute the working fluid. Thus, the filtration device 300 achieves shot retention, magnetic impurity removal, and liquid recycling, effectively preventing impurities from returning to the processing area with the working fluid, which could cause scratches on the workpiece surface, equipment wear, or pipeline blockage. It also significantly reduces the discharge of working fluid and the amount of fresh liquid needed for replenishment, lowering operating costs.

[0043] Optionally, a return port is provided at the bottom of the sedimentation tank 310; the outlet of the filter tank 330 is connected to the return port; the liquid in the filter tank 330 is returned to the sedimentation tank 310 through the outlet and return port of the filter tank 330, and mixes with the pellets settled at the bottom of the sedimentation tank 310 to form a working fluid. When the liquid enters the sedimentation tank 310 from the bottom, it mixes with the pellets settled at the bottom of the sedimentation tank 310, thereby reforming a working fluid with a uniform concentration.

[0044] Optionally, a filter screen 312 is installed at the inlet of the settling tank 310 to filter the slurry. During operation, the slurry returning from the workpiece surface treatment device 200 is first intercepted by the filter screen 312 before entering the settling tank 310. Because the aperture is larger than that of the shot, the shot can pass smoothly through the filter screen 312 into the settling tank 310 without loss. Larger impurities, such as screws and bolts, that may be present in the slurry are blocked by the filter screen 312. This prevents large particles from entering the settling tank 310 and then the turbine unit 212, protecting the turbine unit 212's blades, nozzles, and other structures. When the system is shut down, the impurities on the filter screen can be removed.

[0045] Optionally, an inclined plate 313 is provided at the inlet of the settling tank 310, and the inclined plate 313 slopes downwards away from the overflow port 311. By providing the inclined plate 313 at the inlet of the settling tank 310, and by sloping it downwards away from the overflow port 311, the flow direction of the slurry and adhering liquid after entering the settling tank 310 is changed. When the slurry and adhering liquid flow into the settling tank 310 from the inlet, they first come into contact with the inclined plate 313, and are guided towards the bottom of the settling tank 310, away from the overflow port 311. This prolongs the movement path of the slurry and adhering liquid within the settling tank 310, increasing the settling time of the pellets. Meanwhile, the inclined plate 313 prevents the slurry and attached liquid newly entering the sedimentation tank 310 from directly rushing to the overflow port 311, and prevents the unsettled pellets from being carried away by the surface overflow, which significantly improves the sedimentation efficiency and separation effect of the pellets, and ensures that only liquids containing magnetic impurities can enter the subsequent magnetic separation device 320 through the overflow port 311.

[0046] Optionally, multiple inclined plates 313 are configured, with each inclined plate 313 spaced apart along the width direction of the liquid inlet of the settling tank 310. By setting multiple inclined plates 313, the contact area between the slurry and the adhering liquid and the inclined plates 313 is increased, so that the flow velocity of the slurry and the adhering liquid is reduced and the flow pattern is more uniform when passing through the gaps of the inclined plates 313, which is conducive to further settling of the pellets. At the same time, the combined action of multiple inclined plates 313 can handle a larger flow rate of slurry and adhering liquid without reducing the settling effect, thereby improving the unit volume processing capacity of the settling tank 310.

[0047] Optionally, a support 314 is provided inside the sedimentation tank 310, and an inclined plate 313 is mounted on the support 314, thereby providing a stable support structure for the inclined plate 313 and ensuring that the inclined plate 313 will not be displaced or deformed due to slurry impact or its own weight during use.

[0048] In one optional embodiment, the magnetic separation device 320 includes a liquid inlet tank, a first magnetic roller rotatably disposed within the liquid inlet tank, and a scraper cooperating with the first magnetic roller. The first magnetic roller is used to adsorb magnetic impurities, and the scraper is used to scrape off the magnetic impurities from the first magnetic roller. After the liquid containing magnetic impurities enters the liquid inlet tank, it comes into contact with the rotating first magnetic roller. The magnetic impurities are adsorbed onto the surface of the first magnetic roller. As the first magnetic roller rotates, the adsorbed magnetic impurities separate from the liquid, and then the scraper scrapes them off the surface of the first magnetic roller, thereby achieving the separation of magnetic impurities from the liquid. The magnetic separation device 320 in this embodiment has a compact structure and reliable operation. The scraper can effectively prevent impurities from accumulating too thickly on the surface of the magnetic roller, thus reducing the adsorption efficiency and ensuring a stable separation effect during long-term operation.

[0049] In another optional embodiment, the magnetic separation device 320 includes an inlet tank and a primary roller and a secondary roller arranged sequentially. The primary roller includes a first magnetic roller and a first outer cylinder. The first magnetic roller is fixed inside the first outer cylinder, and the first outer cylinder is rotatable relative to the first magnetic roller. The first magnetic roller forms a first magnetic attraction area and a first non-magnetic area on the surface of the first outer cylinder. The first magnetic attraction area is used to adsorb magnetic impurities. The secondary roller includes a second magnetic roller and a second outer cylinder. The second magnetic roller is fixed inside the second outer cylinder, and the second outer cylinder is rotatable relative to the second magnetic roller. The second magnetic roller forms a second magnetic attraction area and a second non-magnetic area on the surface of the second outer cylinder. The line connecting any point on the axis of the secondary roller and any point on the axis of the primary roller passes through the second magnetic attraction area and the first non-magnetic area.

[0050] During operation, magnetic impurities in the liquid are first attracted by the first magnetic attraction zone of the primary roller and leave the liquid as the first outer roller rotates. When the first outer roller carrying impurities enters the first non-magnetic zone, the magnetism in that area disappears. At this time, since the second magnetic attraction zone of the secondary roller is located at the corresponding position in the first non-magnetic zone, the magnetic force generated by the second magnetic attraction zone attracts the magnetic impurities from the surface of the primary roller to the surface of the secondary roller. The impurities are thus transferred from the primary roller to the secondary roller, achieving separation from the primary roller. After the impurities leave the primary roller, they do not return to the liquid, avoiding recontamination of the working fluid due to incomplete scraping or scraping. Secondly, the secondary roller does not contact the liquid and receives and enriches impurities completely in a dry state, greatly simplifying subsequent impurity cleaning operations and eliminating the corrosion or wear of the secondary roller by the liquid. The combination of these two factors enables continuous and efficient separation of magnetic impurities, which is especially suitable for high-concentration, continuous reflux conditions in the workpiece surface treatment device 200.

[0051] In optional embodiments of the present invention, such as Figures 1 to 5 As shown, the lower end of the main tank 211 is fixedly connected to the upper end of the sedimentation tank 310, making the main tank 211 and the sedimentation tank 310 a whole, making the system more compact and reducing the system's footprint.

[0052] In optional embodiments of the present invention, such as Figure 7 and Figure 8 As shown, the drying device 400 includes: a drying chamber 410, a fan 420, and air knives 430; the drying chamber 410 has an inlet at one end and an outlet at the other end, and flexible baffles are provided at the inlet and outlet of the drying chamber 410 to separate the interior of the drying chamber 410 from the outside; the top and bottom of the drying chamber 410 are provided with slides for limiting the upper and lower ends of the hanger 500, so that the hanger 500 can maintain stability when carrying the workpiece through the drying chamber 410. Multiple air knives 430 are configured, each air knife 430 is vertically arranged inside the drying chamber 410, and each air knife 430 is located on both sides of the extension direction of the slide; the fan 420 is connected to the air knife 430 and is used to supply air to the air knife 430.

[0053] Multiple air knives 430 are vertically arranged inside the drying chamber 410, and all air knives 430 are distributed on both sides of the slide rail extension direction. After the fan 420 supplies air to the air knives 430, the air knives 430 can blow air onto the workpiece surface from both sides simultaneously, thereby quickly and evenly blowing away the residual adhering liquid on the workpiece surface. Compared with natural air drying, the drying device 400 of this application significantly shortens the drying time, improves production efficiency, and avoids occupying too much space due to the long production line required for air drying. Compared with manual wiping, the drying device 400 of this application greatly reduces labor intensity, especially for workpieces with complex shapes, it can also achieve efficient and thorough drying, and the drying effect is more consistent.

[0054] Optionally, each air knife 430 on one side of the slide is defined as the first air knife group, and each air knife 430 on the other side is defined as the second air knife group; wherein, the distance between the first air knife group and the second air knife group is adjustable. Since workpieces of different specifications or shapes have significant dimensional differences in the width direction, the adjustable distance between the first and second air knife groups allows the air knives 430 to be adjusted to the most suitable blowing position according to the actual width of the workpiece. Excessive spacing will lead to dispersed airflow and reduced drying effect, while insufficient spacing may cause airflow interference or excessive impact on the workpiece. By adjusting the distance between the first and second air knife groups, the air outlet of the air knife 430 can be kept at the optimal distance from the workpiece surface, ensuring efficient removal of adhering liquid and avoiding energy waste or workpiece damage caused by improper distance between the air knife 430 and the workpiece. This improves the adaptability and drying efficiency of the drying device 400 to workpieces of different specifications or shapes.

[0055] Optionally, the drying oven 410 is equipped with sliding guide rails corresponding to the air knives 430. The air knives 430 are slidably installed in their respective sliding guide rails, allowing the air knives 430 of the first air knife group and the air knives 430 of the second air knife group to move closer or further apart, thereby adjusting the distance between the first and second air knife groups. The sliding guide rail structure is simple and easy to operate. The operator only needs to push the air knife 430 along the sliding guide rail, and after the air knife 430 slides into place, it is fixed by screws, clips, or clamps. Simultaneously, the independent sliding guide rails ensure that each air knife 430 remains vertical and stable during movement, without deflection or tilting, allowing the adjusted air knife 430 to maintain the optimal blowing angle; furthermore, the position of each air knife 430 can be adjusted according to actual conditions to achieve the best drying effect.

[0056] In other embodiments, multiple installation points for air knives 430 can be provided inside the drying oven 410, which can also achieve the purpose of adjustable spacing between each air knife 430 of the first air knife group and each air knife 430 of the second air knife group in this embodiment.

[0057] Optionally, the height of each air knife 430 is adjustable. This height adjustment allows the air outlet position of the air knife 430 to move vertically up and down. Since the workpieces suspended on the hanger 500 have varying dimensions in the height direction, and the areas requiring focused drying may be at different heights, independent or synchronous adjustment of the air knife 430 heights allows the high-speed airflow to precisely target the moisture-laden areas of the workpiece surface, preventing wasted airflow in unloaded areas. This further improves the targeting and energy efficiency of the drying process. Furthermore, for different batches and workpieces of different heights, there is no need to change the hanger 500 or adjust the production line; simply adjusting the height of the air knife 430 is sufficient for adaptation, enhancing the versatility of the drying device 400.

[0058] Optionally, the height of the air knife 430 can be adjusted by setting a sleeve, with the air outlet on the outer sleeve and the lower end of the inner sleeve connected to the sliding guide rail. The outer sleeve is slidably fitted onto the inner sleeve, and the height of the air knife 430 can be adjusted by sliding the outer sleeve.

[0059] Alternatively, the height of the air knife 430 can be adjusted by setting a lifting assembly. The lifting assembly can be a pneumatic cylinder, an electric cylinder, or a hydraulic cylinder. The air knife 430 is slidably mounted in a sliding guide rail via the lifting assembly, and the height of the air knife 430 is adjusted by raising and lowering the air knife 430 through the lifting assembly.

[0060] Optionally, the air knife 430 is equipped with an adjustment plate, which is used to adjust the opening of the air outlet of the air knife 430 to adjust the air speed and pressure, so as to adapt to different working conditions.

[0061] Optionally, the bottom wall of the drying oven 410 is equipped with a drain outlet. This drain outlet collects and drains any liquid adhering to the workpiece surface that is blown off. During the drying process, a high-speed airflow disperses the liquid adhering to the workpiece surface, and some of it condenses on the inner wall of the drying oven 410 or drips directly to the bottom. The liquid adhering to the workpiece is promptly discharged through the drain outlet, maintaining a relatively dry environment inside the oven and improving the stability of the drying effect.

[0062] Preferably, the drain outlet can be connected to the sedimentation tank 310 of the filter device 300.

[0063] Optionally, the bottom wall of the drying chamber 410 is inclined towards the drain outlet to form a drainage surface for guiding the liquid to the drain outlet. By setting up the drainage surface, the adhering liquid at the bottom of the chamber can automatically and quickly flow to the drain outlet, reducing the evaporation of residual adhering liquid inside the chamber and preventing it from re-forming moisture. It also facilitates thorough emptying during routine cleaning and maintenance. The drainage surface does not require additional power or a scraper, resulting in a simple structure and high reliability.

[0064] Optionally, the drying device 400 also includes a support frame 440; a drying chamber 410 is mounted on the support frame 440; and a fan 420 is mounted on the support frame 440 and located below the drying chamber 410. The support frame 440 supports the drying chamber 410, and the fan 420 is mounted on the support frame 440 and located below the drying chamber 410. This layout makes the entire drying device 400 a single unit, facilitating overall hoisting, transportation, and positioning on the production line. The fan 420's location below the drying chamber 410 effectively utilizes the unused space below the chamber, reducing the equipment's height or length and making the overall structure of the drying device 400 more compact. Simultaneously, the connecting pipe between the fan 420 and the air knife 430 can be designed to be shorter, reducing air pressure loss and improving the fan 420's air supply efficiency. The support frame 440 also provides convenient operating space for the inspection and maintenance of the fan 420.

[0065] Optionally, multiple fans 420 are configured, with each fan 420 corresponding to one air knife 430. Each fan 420 is connected to and supplies air to its corresponding air knife 430. Configuring multiple fans 420 and assigning them one-to-one correspondence with each air knife 430 means that each air knife 430 is directly supplied with air by an independent fan 420. Compared to a single fan 420 supplying air to multiple air knives 430 through a branch duct, independent air supply eliminates problems such as uneven air pressure and airflow distribution caused by duct branching, ensuring stable and consistent air velocity and pressure at the outlet of each air knife 430.

[0066] In optional embodiments of the present invention, such as Figures 9 to 12As shown, the hanger 500 includes a vertical rod 510, a horizontal rod 520, hooks 530, and a connecting plate 540. The upper end of the vertical rod 510 is detachably connected to the connecting plate 540, which is used to connect to the drive device 100. The middle part of the horizontal rod 520 is detachably connected to the vertical rod 510, and the position of the horizontal rod 520 on the vertical rod 510 is adjustable. The hooks 530 are used to suspend workpieces. Multiple hooks 530 are configured and installed on the horizontal rod 520, and the position of each hook 530 on the horizontal rod 520 is adjustable.

[0067] The upper end of the vertical rod 510 is detachably connected to the connecting plate 540, facilitating the replacement of the vertical rod 510 or the connecting plate 540 according to the connection method of different drive devices 100. The middle part of the horizontal rod 520 is detachably connected to the vertical rod 510, and the position of the horizontal rod 520 on the vertical rod 510 can be adjusted up and down, thereby adjusting the suspension height according to the height of the workpiece. Multiple hooks 530 are installed on the horizontal rod 520, and the position of each hook 530 on the horizontal rod 520 can also be adjusted independently, allowing the workpiece to be flexibly arranged with suspension points according to its width, shape, and areas that need to be avoided from being obstructed. Compared with the hanger 500 in the prior art, the hanger 500 provided in this application can adapt to workpieces of various specifications and shapes, eliminating the need to manufacture a separate hanger 500 for each workpiece, significantly reducing tooling costs, reducing adjustment time during production changeovers, and improving the versatility and production efficiency of the surface treatment device.

[0068] Optionally, the vertical rod 510 is provided with a plurality of mounting holes spaced apart along the extension direction of the vertical rod 510, and the horizontal rod 520 can be detachably installed in the mounting holes.

[0069] Multiple mounting holes are spaced apart along the extension direction of the vertical rod 510, and the horizontal rod 520 can be selectively installed in any of these mounting holes. This structure is simple and reliable. Operators can adjust the height of the horizontal rod 520 simply by disassembling it and reinserting it into the mounting hole at the desired height, without the need for complicated tools.

[0070] In other alternative embodiments, the crossbar 520 can be slidably mounted on the vertical bar 510. After the crossbar 520 slides to a preset position, it can be locked with screws or pins, which can also achieve the purpose of adjusting the position of the crossbar 520 on the vertical bar 510 in this embodiment.

[0071] Optionally, the mounting holes include insertion tubes 511 disposed on both sides of the vertical rod 510 in the extending direction; wherein, the axial direction of the insertion tubes 511 can be parallel to or perpendicular to the axial direction of the vertical rod 510. In this embodiment, the axial direction of the insertion tubes 511 is disposed parallel to the axial direction of the vertical rod 510 to improve the stability of the crossbar 520. The crossbar 520 is provided with a pin 521 that cooperates with the insertion tubes 511, and the pin 521 is detachably inserted into the insertion tubes 511.

[0072] During installation, simply insert the two pins 521 on the crossbar 520 into the two inserts 511 on the vertical bar 510; during disassembly, simply pull the pins 521 out of the inserts 511; the operation is very convenient. The inserts 511 serve a dual function of guiding and limiting the pins 521, ensuring that the crossbar 520 will not rotate or shift when subjected to the weight of the workpiece or the impact of airflow or slurry during processing, resulting in high connection reliability. Simultaneously, the structure of the inserts 511 and pins 521 facilitates the installation of multiple sets of inserts 511 along the height direction on the vertical bar 510, enabling rapid repositioning and adjustment.

[0073] In an optional embodiment of the present invention, the hook 530 is slidably disposed on the crossbar 520 along the extension direction of the crossbar 520, and the two ends of the crossbar 520 are provided with limiting members to prevent the hook 530 from falling off the crossbar 520 when sliding, so as to avoid affecting the normal production process.

[0074] Furthermore, insertion holes are provided at both ends of the crossbar 520, and the limiting component is a detachable limiting rod inserted into the insertion hole. By using the limiting rod as the limiting component, the structure is simple and easy to assemble and disassemble.

[0075] In other alternative embodiments, the limiting member may also be a limiting plug or other structure inserted at both ends of the crossbar 520, wherein the cross-sectional area of ​​the limiting plug is larger than the cross-sectional area of ​​the crossbar 520, thereby preventing the hook 530 from coming off the crossbar 520 when sliding.

[0076] Optionally, the cross section of the crossbar 520 is square; the hook 530 is provided with a connecting ring that matches the crossbar 520, that is, the connecting ring is also square, and the connecting ring is slidably fitted onto the crossbar 520.

[0077] In actual use, by minimizing the fit gap between the connecting ring and the crossbar 520, the hook 530 can be prevented from sliding on the crossbar 520 during normal use by relying on its own weight and the weight of the workpiece.

[0078] In other alternative implementations, fasteners such as locking screws can be provided to fix the connecting ring after it slides to a preset position.

[0079] Optionally, a protective frame 550 is also included; the protective frame 550 is set on the vertical bar 510 and located below the horizontal bar 520, and the position of the protective frame 550 on the vertical bar 510 is adjustable; the workpiece suspended on the hook 530 is also inserted inside the protective frame 550.

[0080] The workpiece suspended on the hook 530 is also placed within the protective frame 550, which serves to limit and protect it. When the drive device 100 drives the hanger 500, the protective frame 550 effectively prevents the workpiece from swinging significantly due to inertia or external airflow and slurry impact, avoiding collisions between adjacent workpieces or scratches with the internal structure of the equipment. Simultaneously, the protective frame 550 also prevents the workpiece from shifting due to wind force when passing through the drying device 400, ensuring the stability of the drying effect. The adjustable design allows the protective frame 550 to be adjusted to a suitable surrounding position according to the height and shape of the workpiece, providing protection without hindering normal surface treatment operations.

[0081] Optionally, the guard frame 550 and the crossbar 520 can share the same set of mounting holes. Both the crossbar 520 and the guard frame 550 can be inserted into the mounting holes.

[0082] Both the crossbar 520 and the guard frame 550 are provided with pins 521 that cooperate with the insertion tube 511. The pins 521 are detachably inserted into the corresponding insertion tube 511.

[0083] During installation, simply insert the two pins 521 on the crossbar 520 and the guard frame 550 into the two inserts 511 on the vertical bar 510; during disassembly, simply pull the pins 521 out of the inserts 511; the operation is very convenient. The inserts 511 serve a dual function of guiding and limiting the pins 521, ensuring that the crossbar 520 and the guard frame 550 will not rotate or shift when subjected to the weight of the workpiece or the impact of airflow or slurry during processing, resulting in high connection reliability. Simultaneously, the structure of the inserts 511 and pins 521 facilitates the installation of multiple sets of inserts 511 along the height direction on the vertical bar 510, thereby enabling rapid repositioning and adjustment.

[0084] Optionally, multiple crossbars 520 are configured, with each crossbar 520 spaced apart along the extension direction of the vertical bar 510; a guard frame 550 is configured in correspondence with each crossbar 520, and the guard frame 550 is located below the corresponding crossbar 520.

[0085] Multiple horizontal bars 520 can simultaneously suspend multiple rows of workpieces, making full use of the height space of the vertical bars 510, increasing the load capacity of the hanger 500, and thus improving the operating efficiency of the workpiece surface treatment device 200. The protective frame 550 corresponds one-to-one with the horizontal bars 520, and is located below the corresponding horizontal bar 520, ensuring that the protective frame 550 always protects the workpiece and avoids affecting production.

[0086] Optionally, a baffle plate can be detachably installed at the upper end of the vertical rod 510. The baffle plate can isolate the drive unit 100 from the turbine unit 212 of the workpiece surface treatment device 200 and the cleaning pipeline, so as to prevent liquids, shot or magnetic impurities from splashing into the drive unit 100 and affecting the normal operation of the drive unit 100.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A workpiece surface treatment system, characterized in that, The workpiece surface treatment system includes: a drive device (100), a workpiece surface treatment device (200), a filter device (300), a drying device (400), and a hanger (500). The workpiece surface treatment device (200) and the drying device (400) are arranged sequentially along the processing path of the workpiece; the workpiece surface treatment device (200) includes a wet shot blasting device (210) and a cleaning device (220) connected in series; the wet shot blasting device (210) is used to wet shot blast the workpiece, the cleaning device (220) is used to clean the workpiece, and the drying device (400) is used to remove residual adhering liquid from the surface of the workpiece. The driving device (100) includes a driving mechanism (110) and a transmission mechanism (120). The hanger (500) is connected to the transmission mechanism (120), and the workpiece can be suspended on the hanger (500). The driving mechanism (110) is connected to the transmission mechanism (120) and drives the transmission mechanism (120) to drive the hanger (500) to pass through the workpiece surface treatment device (200) and the drying device (400) in sequence. The filtration device (300) is used to receive the slurry from the workpiece surface treatment device (200) and the adhering liquid from the drying device (400), the slurry and the adhering liquid are mixed in the filtration device (300), and the pellets and magnetic impurities in the slurry are separated from the adhering liquid and the medium liquid in the slurry.

2. The workpiece surface treatment system according to claim 1, characterized in that, The workpiece surface treatment device (200) further includes a pre-cleaning device (230); the pre-cleaning device (230) is used to pre-clean the surface of the workpiece; the pre-cleaning device (230), the wet shot blasting device (210) and the cleaning device (220) are connected in series along the processing path of the workpiece.

3. The workpiece surface treatment system according to claim 1, characterized in that, The wet shot blasting device (210) includes a main housing (211) and a turbine unit (212). The main housing (211) is provided with a processing channel, and the transmission mechanism (120) can drive the hanger (500) through the processing channel; the turbine unit (212) is provided on the main housing (211), and the spray direction of the working fluid of the turbine unit (212) is directed towards the processing channel; The wet shot blasting device (210) is configured in multiple ways. All the wet shot blasting devices (210) are arranged sequentially along the processing path of the workpiece. The main housings (211) of two adjacent wet shot blasting devices (210) are connected by a connecting box. Multiple turbine units (212) are arranged on each main housing (211), and the spraying direction of the working fluid of each turbine unit (212) is different. The turbine units (212) on the same main housing (211) are arranged in pairs, and the working fluid sprayed by the two turbine units (212) in the same pair can converge. Alternatively, multiple turbine units (212) are arranged on the main housing (211), and the spraying direction of the working fluid of each turbine unit (212) is different. The turbine units (212) are arranged in pairs, and the working fluid sprayed by the two turbine units (212) in the same pair can converge.

4. The workpiece surface treatment system according to claim 3, characterized in that, The projectile direction of both turbine units (212) in the same pair is either diagonally upward or diagonally downward.

5. The workpiece surface treatment system according to claim 1, characterized in that, The transmission mechanism (120) has a closed-loop structure and has a first side and a second side; the workpiece surface treatment device (200) is located on the first side of the transmission mechanism (120) and the drying device (400) is located on the second side of the transmission mechanism (120).

6. The workpiece surface treatment system according to claim 1, characterized in that, It also includes a drainage device; The draining device is disposed between the workpiece surface treatment device (200) and the drying device (400); the draining device includes a draining tank and a conveying pump, and the draining tank is connected to the filter device (300) through the conveying pump.

7. The workpiece surface treatment system according to claim 3, characterized in that, The filtration device (300) includes: a sedimentation tank (310), a magnetic separation device (320), and a filtrate tank (330); The settling tank (310) is used to receive the slurry from the workpiece surface treatment device and the adhering liquid from the drying device (400), and the pellets in the slurry can settle in the settling tank (310); The sedimentation tank (310) is provided with an overflow port (311) at the top. The overflow port (311) is positioned higher than the liquid inlet of the magnetic separation device (320). The overflow port (311) is connected to the liquid inlet of the magnetic separation device (320). The medium liquid, the adhering liquid, and the magnetic impurities enter the magnetic separation device (320) through the overflow port (311) and the liquid inlet of the magnetic separation device (320). The magnetic separation device (320) is used to separate the medium liquid and the adhering liquid from the magnetic impurities. The inlet of the filtrate tank (330) is connected to the outlet of the magnetic separation device (320). The medium liquid and the adhering liquid after separation from the magnetic impurities enter the filtrate tank (330) through the outlet of the magnetic separation device (320) and the inlet of the filtrate tank (330) for storage and are used to prepare the working fluid required by the workpiece surface treatment device (200).

8. The workpiece surface treatment system according to claim 7, characterized in that, The lower end of the main tank (211) is fixedly connected to the upper end of the sedimentation tank (310).

9. The workpiece surface treatment system according to claim 1, characterized in that, The drying device (400) includes: a drying box (410), a fan (420), and an air knife (430); The drying chamber (410) has an inlet at one end and an outlet at the other end; the top and bottom of the drying chamber (410) are provided with slides for limiting the upper and lower ends of the hanger (500); multiple air knives (430) are configured, each air knife (430) is vertically arranged inside the drying chamber (410), and each air knife (430) is located on both sides of the extension direction of the slide; the fan (420) is connected to the air knife (430) and is used to supply air to the air knife (430).

10. The workpiece surface treatment system according to claim 1, characterized in that, The hanging device (500) includes: a vertical bar (510), a horizontal bar (520), a hook (530), and a connecting plate (540); The upper end of the vertical rod (510) is detachably connected to the connecting plate (540), which is used to connect to the driving device (100); the middle part of the horizontal rod (520) is detachably connected to the vertical rod (510), and the position of the horizontal rod (520) on the vertical rod (510) is adjustable; the hook (530) is used to suspend the workpiece, and multiple hooks (530) are configured. The hooks (530) are installed on the horizontal rod (520), and the position of each hook (530) on the horizontal rod (520) is adjustable.

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