A method and apparatus for hot dip centrifugal plating of complex components

Abstract

The application relates to a complex component hot-dip centrifugal plating method and equipment, which comprises the following main steps: step one, a cleaning process, a plurality of parts are loaded into a carrier, a driving assembly is started, the carrier is vibrated while rotating, the plurality of parts are uniformly distributed on the outer edge of the carrier, and cleaning liquid, clean water and flux are sequentially fed into the carrier to complete the cleaning work of the plurality of parts; step two, a tinning process, the cleaned parts are transmitted from the carrier to the upper side of a molten tin pool, and after the parts are positioned, the carrier is lowered to immerse into the molten tin pool for tinning work; after the temperature of the parts is consistent with the temperature of the tin liquid, the carrier is lifted to move out of the molten tin pool. Through the setting of the carrier cooperating with the rotating centrifugal mode, the centrifugal effects of the plurality of parts are unified, the transition extrusion and collision among the parts are prevented, the completeness of the plating layer is ensured, and the problems of traditional hot-dip plating hanging tin and uneven plating layer are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to surface treatment technology, in particular to a metal part surface hot dip tinning technology. BACKGROUND

[0002] Tinning on the surface of the part can increase the corrosion resistance and welding performance of the metal part, and improve the appearance of the workpiece. The tinning methods include electroplating, hot dip plating and chemical tinning. Hot dip plating can greatly reduce the occurrence of tin whiskers and avoid the environmental risk of electroplating, save cost, and at the same time, simple operation can improve work efficiency, so it is widely used.

[0003] Chinese patent CN115216715 A discloses a hot dip galvanizing system, which comprises a mounting seat, a hot dip plating tank is arranged on the mounting seat, and a zinc liquid is arranged in the hot dip plating tank. An elevator is movably arranged on the top of the workshop above the hot dip plating tank. The elevator movably has a lifting chain, and the lifting chain movably has a workpiece. The workpiece is suspended by the lifting chain and soaked in the zinc liquid in the hot dip plating tank. The system further comprises a dross removal device, and the dross removal devices are symmetrically arranged on the two side walls of the hot dip plating tank. The two dross removal devices cooperate with each other.

[0004] However, the inventors found that some parts have complex shapes and cannot be continuously hot-dipped by using a mold like uniform plate strips or wires. When complex parts are hot-dipped, uneven tinning may occur, affecting product quality. When multiple parts are centrifuged in a centrifugal frame, not only the centrifugal effects of inner and outer parts are different, but also the mutual collision and friction between the parts may cause the plating layer to be depressed and fall off. SUMMARY

[0005] The purpose of the present application is to solve the problems of uneven tinning and plating layer in the prior art. The complex parts are hot-dipped and centrifuged by using a tinning method, and a carrier is used to fix the multiple parts at a specific position under the action of centrifugation, so as to prevent excessive extrusion and collision between the parts and ensure the integrity of the plating layer.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a complex part hot-dip centrifugal tinning equipment, comprising a rack and a carrier arranged on the rack;

[0007] The carrier comprises a driving assembly arranged on the rack, a containing assembly arranged on the driving assembly and located below the driving assembly, an auxiliary assembly arranged on the containing assembly and located at the center position of the containing assembly, and an isolation assembly arranged in the outer edge cavity of the containing assembly;

[0008] When the parts are tinned, the driving assembly drives the containing assembly to vibrate and rotate to divide the parts loaded in the containing assembly, and the auxiliary assembly drives the containing assembly to change the state to fix the parts from bottom to top at the edge of the containing assembly. After the parts are cleaned in the space formed by the containing assembly and the isolation assembly, the driving assembly drives the containing assembly and the parts to move and immerse in the molten tin pool. After the temperature of the parts is consistent with the temperature of the molten tin, the parts leave the molten tin pool. The driving assembly drives the parts in the containing assembly to rotate and centrifuge, and cooperates with the hot air flow provided by the auxiliary assembly to discharge the excess molten tin. After the centrifuging is completed, the parts are output for cooling.

[0009] Further, the containing assembly comprises a centrifugal frame for containing the parts, a first U-shaped frame connected to the centrifugal frame, a second U-shaped frame connected to the first U-shaped frame through a rotating shaft, an avoiding groove opened at the bottom of the centrifugal frame, and a plurality of positioning members arranged around the avoiding groove on the centrifugal frame and used for fixing the position of the parts.

[0010] Further, the driving assembly comprises a driving frame connected to the rack, a first driving cylinder connected to the driving frame, a motor connected to the output end of the first driving cylinder, an extension member connected to the output end of the motor and connected to the second U-shaped frame, a first sawtooth ring connected to the driving frame, and a second sawtooth ring connected to the second U-shaped frame and cooperating with the first sawtooth ring to drive the centrifugal frame to vibrate.

[0011] Further, the auxiliary assembly comprises a second driving cylinder connected to the first U-shaped frame and having a mounting cylinder connected to the output end, a plurality of air guide pipes penetrating through the mounting cylinder, a heating wire connected to the air guide pipes, and a fan connected to the mounting cylinder.

[0012] Further, the isolation assembly comprises a partition plate connected to the centrifugal frame, two trigger rods connected to the partition plate and provided with protrusions, and a clamping groove provided with recesses and opened in the mounting cylinder.

[0013] Further, the positioning member comprises a mounting seat provided on the centrifugal frame, a first fixing plate connected to the mounting seat through a torsional spring member, a second fixing plate connected to the first fixing plate, ventilation grooves respectively opened in the first fixing plate and the second fixing plate, a stop block connected to the second fixing plate, and a plurality of extrusion blocks connected to the mounting cylinder through the first springs and corresponding to the stop blocks.

[0014] Further, the hot-dip centrifugal tinning equipment for complex parts further comprises a protection mechanism arranged on the molten tin pool, and the protection mechanism comprises two groups of mounting racks arranged on the molten tin pool, a first arc-shaped plate connected to the mounting racks, a gear ring connected to the first arc-shaped plate, a second arc-shaped plate connected to the gear ring, a first transmission shaft connected to the mounting racks, a driving gear connected to the first transmission shaft and in meshing transmission with the gear ring, a second transmission shaft arranged perpendicularly to the first transmission shaft and connected to the mounting racks, bevel gears arranged on the first transmission shaft and the second transmission shaft respectively and in meshing transmission with each other, a first rack connected to the second U-shaped frame, and a first gear connected to the second transmission shaft and in meshing transmission with the first rack.

[0015] Further, the hot-dip centrifugal tinning equipment for complex parts further comprises an output mechanism arranged on the conveying device, and the output mechanism comprises an L-shaped rod connected to the conveying device, a second rack connected to the L-shaped rod, a second gear connected to the rotating shaft and in meshing transmission with the second rack, a limiting hole opened in the rotating shaft, a limiting frame connected to the second U-shaped frame through a second spring and clamped into the limiting hole, a blocking rod connected to the L-shaped rod and used for blocking the limiting frame, and a collection box arranged on the conveying device.

[0016] Further, the hot-dip centrifugal tinning method based on the hot-dip centrifugal tinning equipment for complex parts comprises the following main steps.

[0017] Step one, a cleaning process, the driving assembly drives the containing assembly to move to a position above the parts through the driving frame, a plurality of parts are loaded into the carrier, the driving assembly is started, the carrier vibrates while rotating, the plurality of parts are uniformly distributed on the outer edge of the carrier, and then cleaning liquid, clean water and flux are sequentially introduced into the carrier, so that the cleaning of the plurality of parts is completed.

[0018] Step two, a tinning process, after the cleaning process is completed, the driving assembly drives the containing assembly to move above the molten tin pool, and the installation cylinder and the partition plate are both moved upward to avoid under the driving of the second driving cylinder in the auxiliary assembly, the centrifugal frame is completely opened, at this time, the installation cylinder still limits the positions of the plurality of positioning members, then the parts are immersed into the molten tin pool together with the centrifugal frame to perform tinning.

[0019] Step three, a centrifugal process, the centrifugal frame drives the tinned parts to move to the position of the protection mechanism, the second driving cylinder drives the installation cylinder to move downward alone until the installation cylinder is flush with the positioning members, and the ventilation groove on the positioning members is opened when the installation cylinder moves upward synchronously, with the centrifugal frame starting to centrifuge, the installation cylinder sprays hot air flow to guide the separation of excess tin liquid, so that a uniform and bright tinning layer is formed on the parts.

[0020] Step four, output process, after centrifugation is completed, the centrifugal frame is driven to the output mechanism position under the driving frame, under the action of the output mechanism, the centrifugal frame is turned over and the parts are discharged, and the collection box on the conveying device collects.

[0021] Further, in step three, the speed of high-speed centrifugation is 3000-10000r / min.

[0022] The beneficial effects of the present application are:

[0023] (1) The present application adopts a process design of continuous flow type oxidative cleaning and water washing in a small space, which ensures the concentration of the cleaning liquid in the reaction process, can efficiently perform deep activation treatment on the surface of the parts, and lays a solid foundation for the subsequent hot dip tinning process. After the parts are hot-dipped, the excess tin liquid can be quickly separated from the complex parts such as grooves under the dual action of centrifugal force and hot air blowing. In this way, even for parts with complex structure, the surface coating can also reach a uniform and high-quality state, significantly improving the reliability and applicability of the tinning process.

[0024] (2) The present application uniformly distributes multiple parts on the outer edge of the carrier, and fixes the position of the parts in the vertical direction by means of the positioning member, realizes the stable distribution of the parts in the centrifugation process, and sets the separation direction of the excess tin liquid of each part not to coincide with each other, effectively avoids the tin liquid separated from the inner layer parts from falling on the outer layer parts again, solves the problem of inconsistent quality of the coating of the parts caused by the secondary attachment of the tin liquid in the traditional process, and further significantly improves the uniformity of the coating quality of the multiple parts after centrifugal tinning.

[0025] In summary, the present application has the advantages of uniform coating of the surface of the parts, high completeness, and no knocking off. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0027] Figure 2 It is a schematic diagram of the carrier of the present application;

[0028] Figure 3 It is a schematic diagram of the driving assembly of the present application;

[0029] Figure 4 It is a schematic diagram of the isolation assembly of the present application;

[0030] Figure 5 It is a schematic diagram of the auxiliary assembly of the present application;

[0031] Figure 6 It is a schematic diagram of the state before the present application is immersed in the molten tin pool;

[0032] Figure 7 Fig. 7 is a schematic view of the ventilation slot opening state of the positioning member of the present application;

[0033] Figure 8 Fig. 8 is a schematic view of the protection mechanism of the present application;

[0034] Figure 9 Fig. 9 is a schematic view of the output mechanism of the present application;

[0035] Figure 10 Fig. 10 is a schematic view of the fixed state of the parts of the present application;

[0036] Figure 11 Fig. 11 is a schematic view of the production process of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0039] Embodiment one

[0040] As shown in Figures 1-2 and Figure 11 , the present embodiment provides a tinning method based on a complex part hot-dip centrifugal tinning equipment, which includes the following main steps:

[0041] Step one, cleaning process, drive assembly 12 through the drive frame 121 with the containing assembly 11 to move to the parts on the location, the multiple parts into the carrier 1, start drive assembly 12, carrier 1 vibration at the same time rotating, multiple parts are evenly distributed in the outer edge of the carrier 1, then into the carrier 1 in turn clean water and flux, complete the cleaning of multiple parts work;

[0042] Step two, tin plating process, after cleaning, drive assembly 12 through the drive frame 121 with the containing assembly 11 to move to the tin pool 200 above, and in the auxiliary assembly 13 second drive cylinder 132 driven, installation cylinder 131 and the baffle 141 are all upward to avoid, centrifugal frame 111 is completely open, at this time the installation cylinder 131 bottom still limit the position of multiple positioning parts 114, then the parts with centrifugal frame 111 together immersed in the molten tin pool 200 for tin plating;

[0043] Step three, centrifugal process, centrifugal frame 111 drive parts after plating to the protection mechanism 2 position, the second drive cylinder 132 drive installation cylinder 131 alone downward, until with the positioning part 114 flush, before the installation cylinder 131 upward movement has opened the ventilation slot 1145 on the positioning part 114, with the centrifugal frame 111 starts to centrifugal, installation cylinder 131 jet hot air flow guide excess tin liquid separation, so that the parts form uniform bright tin plating layer;

[0044] Step four, output process, after centrifugal, centrifugal frame 111 in drive frame 121 down to the output mechanism 3 position, under the action of output mechanism 3, centrifugal frame 111 overturn and discharge parts, by the collection box 38 on the conveying device 300 collection.

[0045] In this embodiment, by setting in a small space continuously for oxidation cleaning and washing, so that the surface of the parts is fully activated, hot dip plating after the parts in the centrifugal and hot air blowing way, so that the excess tin liquid quickly from the parts groove separation, ensure that the complex parts surface coating can also reach the uniform state.

[0046] It should be noted that the cleaning liquid for the removal of the parts surface oil and oxidation cleaning, clean water to remove the residual cleaning liquid, finally the combination of flux and parts can be immersed in the flux pool or the flux as the same way into the carrier and then discharge, so as to form a layer of flux film on the surface of the parts.

[0047] It is worth emphasizing that the hot dip centrifugal plating technology can be plated on the surface of the workpiece tin alloy, zinc alloy and other alloy coating. But the traditional electroplating can only be plated with single metal coating, not easy to alloy coating.

[0048] Example two

[0049] AsFigures 1-2 and Figure 11 As shown in FIG. 1, wherein the same or corresponding parts as in Example One are denoted by the corresponding reference numerals, for the sake of brevity, only the differences from Example One are described below. The difference between this Example Two and Example One is that:

[0050] As shown in FIG. 1, wherein the same or corresponding parts as in Example One are denoted by the corresponding reference numerals, for the sake of brevity, only the differences from Example One are described below. The difference between this Example Two and Example One is that: Figures 1-2 and Figure 11 As shown in FIG. 1, wherein the same or corresponding parts as in Example One are denoted by the corresponding reference numerals, for the sake of brevity, only the differences from Example One are described below. The difference between this Example Two and Example One is that:

[0051] In this Example, the time required for centrifugation is saved by increasing the rotational speed, thereby ensuring that the excess tin liquid on the surface of the part is separated before the part is shaped.

[0052] Example Three

[0053] As shown in FIG. 1, wherein the same or corresponding parts as in Example One are denoted by the corresponding reference numerals, for the sake of brevity, only the differences from Example One are described below. The difference between this Example Two and Example One is that: Figures 1-2 As shown in FIG. 1, wherein the same or corresponding parts as in Example One are denoted by the corresponding reference numerals, for the sake of brevity, only the differences from Example One are described below. The difference between this Example Two and Example One is that:

[0054] Figures 1-2 As shown in FIG. 1, wherein the same or corresponding parts as in Example One are denoted by the corresponding reference numerals, for the sake of brevity, only the differences from Example One are described below. The difference between this Example Two and Example One is that:

[0055] The carrier 1 includes a driving assembly 12 arranged on the frame, a containing assembly 11 arranged on the driving assembly 12 and located below the driving assembly 12, an auxiliary assembly 13 arranged on the containing assembly 11 and located at the center of the containing assembly 11, and an isolation assembly 14 arranged in the outer edge cavity of the containing assembly 11.

[0056] When the part is being plated, the driving assembly 12 drives the containing assembly 11 to vibrate and rotate, thereby separating the parts loaded in the containing assembly 11, while the auxiliary assembly 13 drives the containing assembly 11 to change state, thereby fixing the parts from bottom to top in the outer edge position of the containing assembly 11. After the parts are cleaned in the space formed by the containing assembly 11 and the isolation assembly 14, the driving assembly 12 drives the containing assembly 11 and the parts to move and immerse in the molten tin pool 200. After the temperature of the parts is consistent with that of the tin liquid, the parts leave the molten tin pool 200. The driving assembly 12 drives the parts in the containing assembly 11 to rotate and centrifuge, and cooperates with the hot air flow provided by the auxiliary assembly 13 to discharge the excess tin liquid. After centrifugation, the parts are output for cooling.

[0057] In this Example, the parts are more easily plated by setting the containing assembly 11 to cooperate with the driving assembly 12 and the isolation assembly 14 after pretreatment. The excess tin liquid can also be completely separated during centrifugation with the cooperation of the auxiliary assembly 13, thereby greatly improving the quality of the plated layer of the parts.​

[0058] In detail, firstly, the parts are received by the containing assembly 11, then the parts are vibrated by the driving assembly 12 to complete the treatment of the self-oxide and impurities, and meanwhile, the parts are uniformly distributed, after the parts are fixed in the space formed by the containing assembly 11 and the isolation assembly 14, the oxidation cleaning and water washing are sequentially performed, then the isolation assembly 14 is opened along with the rising of the auxiliary assembly 13, the parts start to enter the inside of the molten tin pool 200, after the tinning is completed, the centrifugal work is performed at the position of the protection mechanism 2 in cooperation with the auxiliary assembly 13, the excess tin liquid in the recess of the parts with complex structure is removed, and finally, the parts are output at the position of the output mechanism 3.

[0059] Further, as shown in Figures 1-2 and Figures 4-6 , the containing assembly 11 comprises a centrifugal frame 111 for containing the parts, a first U-shaped frame 112 connected to the centrifugal frame 111, a second U-shaped frame 124 connected to the first U-shaped frame 112 through a rotating shaft 110, an avoiding groove 113 opened at the bottom of the centrifugal frame 111, and a plurality of positioning members 114 arranged around the avoiding groove 113 on the centrifugal frame 111 and used for fixing the positions of the parts.

[0060] In the embodiment, by setting the containing assembly 11 in cooperation with the positioning members 114, the parts are all concentrated at the positions around the centrifugal frame 111, so that the centrifugal effects of the plurality of parts are consistent, thereby avoiding the phenomenon that the tin liquid on the inner layer parts comes to the outer layer parts after the centrifugal, and further causing the quality of the parts to be difficult to be uniformly grasped.

[0061] In detail, firstly, the centrifugal frame 111 is driven by the driving assembly 12 to perform the input work of the parts at the initial position, after the parts are input, the parts are stacked between the centrifugal frame 111 and the positioning members 114 in the folded state, at this time, the plurality of positioning members 114 are in the inclined and folded state, and the activity range of the parts is large.

[0062] Further, as shown in Figures 1-3 and Figure 8 , the driving assembly 12 comprises a driving frame 121 connected to the rack 100, a first driving cylinder 122 connected to the driving frame 121, a motor 123 connected to the output end of the first driving cylinder 122, an extension member 125 connected to the output end of the motor 123 and connected with the second U-shaped frame 124, a first sawtooth ring 126 connected to the driving frame 121, and a second sawtooth ring 127 connected to the second U-shaped frame 124 and cooperating with the first sawtooth ring 126 to drive the centrifugal frame 111 to vibrate.

[0063] In the embodiment, the driving assembly 12 is arranged to drive the centrifugal frame 111 to vibrate and rotate, so that the oxide scale and rust on the plurality of workpieces are removed in the process, and the metal surface is fully activated by the oxidation cleaning and water washing, and the plurality of workpieces are uniformly dispersed in the circumferential direction, which is beneficial to the subsequent position fixing and stability of the device in the centrifugal process.

[0064] In detail, after the parts are input, the driving frame 121 drives the containing assembly 11 to move to the oxidation cleaning and water washing position, and then the motor 123 starts to rotate, and drives the second U-shaped frame 124, the first U-shaped frame 112 and the centrifugal frame 111 to rotate through the telescopic part 125. In the process, the telescopic part 125 is stretched due to the continuous extrusion between the second sawtooth ring 127 and the first sawtooth ring 126, and the centrifugal frame 111 moves downward. Then, after the sawteeth of the second sawtooth ring 127 and the first sawtooth ring 126 are misaligned, no extrusion occurs between them. At this time, the telescopic part 125 immediately retracts and resets. The parts start to vibrate under the driving of the centrifugal frame 111 and the inertia of the parts themselves, and continuously collide and rub with each other. At the same time, under the rotation of the centrifugal frame 111, the plurality of parts are gradually and uniformly distributed in the circumferential direction.

[0065] It should be noted that in the latter period of the vibration, the auxiliary assembly 13 cooperates with the positioning part 114 to gradually change the plurality of positioning parts 114 from the gathered state to the expanded state, thereby gradually fixing the plurality of parts in the circumferential direction of the centrifugal frame 111, and then starting the oxidation cleaning and water washing work.

[0066] Further, as shown in Figures 1-2 and Figures 5-9 , the auxiliary assembly 13 includes a second driving cylinder 132 connected to the first U-shaped frame 112 and having an installation cylinder 131 connected to the output end, a plurality of air guide pipes 133 penetrating through the installation cylinder 131, heating wires 134 connected to the air guide pipes 133, and a fan 135 connected to the installation cylinder 131.

[0067] In the embodiment, the auxiliary assembly 13 is arranged to blow hot air in an inclined downward manner, providing air force in two directions of the top and the inner side of the parts, solving the problem that the tin liquid in the recesses on the top and the inner side of the parts is slowly discharged in the centrifugal process, affecting the uniformity of the plating layer.

[0068] In detail, after the plurality of parts are uniformly distributed in the centrifugal frame 111, the second driving cylinder 132 drives the installation cylinder 131 to slowly move upward with the vibration of the parts, and in the process, the plurality of positioning parts 114 are gradually rotated to the vertical state, and the parts are fixed between the positioning parts 114 and the centrifugal frame 111.

[0069] It should be noted that the complex structure of the part in the centrifugal, its bottom and the excess tin liquid of the outside part of the rotating path can be separated quickly under the action of gravity and centrifugal force, but the excess tin liquid located in the inside and the top needs more time and power to completely separate. Since the tin liquid begins to solidify after leaving the tin bath 200, the centrifugal process is very short, so the time left for the separation of the excess tin liquid in the inside of the part is not sufficient, and the auxiliary assembly 13 is inclined downward to blow, which promotes the rapid separation of the excess tin liquid in the inside and the top from the part groove, and the hot air can maintain the flow state of the excess tin liquid to prevent it from solidifying before separation.

[0070] Further, as shown in Figures 1-2 and Figures 4-8 , the isolation assembly 14 includes a partition 141 connected to the centrifugal frame 111, two groups of trigger rods 143 connected to the partition 141 and provided with protrusions 142, and a clamping groove 145 provided with recesses 144 in the mounting cylinder 131.

[0071] In this embodiment, the isolation assembly 14 is provided so that the centrifugal frame 111 can form a space in cooperation with the positioning member 114 before entering the tin bath 200, and the parts can be oxidized and washed in this space. The washing process can achieve the desired effect, preventing the occurrence of inconsistent effects caused by concentration changes in the pool during oxidation and washing.

[0072] In detail, after the parts complete the vibration distribution and fixing work, the cleaning liquid is first introduced into the centrifugal frame 111. Since there is a certain distance between the bottom of the positioning member 114 and the centrifugal frame 111, the cleaning liquid after injection will drive the dirt and rust points that fall off the parts after vibration to be discharged from the gap position. After the oxidation cleaning reaction is completed, clean water is injected for water washing. The number of oxidation cleaning and water washing is adjusted according to the need to ensure that the surface of the part is fully activated, and finally the flux coating work is performed.

[0073] It should be noted that during the oxidation cleaning and water washing process, the flow gradually decreases from large to small, first to ensure that all parts are immersed in the cleaning liquid, second to maintain the height of the cleaning liquid to ensure the reaction time, and third to maintain the reaction concentration of the cleaning liquid.

[0074] Further, as shown in Figures 1-3 and Figures 4-7 and Figure 10As shown, the positioning member 114 includes a mounting seat 1141 arranged on the centrifugal frame 111, a first fixing plate 1143 connected to the mounting seat 1141 through a torsion spring member 1142, a second fixing plate 1144 connected to the first fixing plate 1143, ventilation grooves 1145 respectively arranged on the first fixing plate 1143 and the second fixing plate 1144, a stop block 1146 connected to the second fixing plate 1144, and a plurality of extrusion blocks 1148 connected to the mounting cylinder 131 through first springs 1147 and corresponding to the stop block 1146.

[0075] In the embodiment, by arranging the positioning member 114, a plurality of parts are fixed in the vertical direction at the circumferential position of the centrifugal frame 111, so that in the centrifugal process, the parts do not collide with each other, the plating layer of the parts is protected from falling off, and the parts are concentrated at the circumferential position of the centrifugal frame 111, so that the centrifugal effect of the plurality of parts is consistent, and the phenomenon that the tin liquid on the inner layer parts comes to the outer layer parts after centrifugation, thereby causing the quality of the parts to be difficult to unify, does not occur.

[0076] In detail, in the vibration process, the mounting cylinder 131 is gradually moved upward by a small distance under the driving of the second driving cylinder 132, and at the same time, the mounting cylinder 131 starts to extrude a plurality of positioning members 114, so that the plurality of positioning members 114 rotate around the torsion spring member 1142 on the mounting seat 1141, gradually reach the vertical state and fix the parts; then the motor 123 in the driving assembly 12 stops working, and oxidation cleaning and water washing work is started; after the oxidation cleaning and water washing work is completed, the motor 123 continues to rotate, and residual liquid is removed by vibration, at this time the parts are fixed and move with the centrifugal frame 111 under the action of the centrifugal frame 111 and the positioning member 114; after the above-mentioned actions are completed, the mounting cylinder 131 continues to move upward, at this time the extrusion blocks 1148 connected to the mounting cylinder 131 contact and extrude the stop blocks 1146 on the second fixing plate 1144, and due to the elastic force of the first springs 1147, initially the second fixing plate 1144 moves upward with the extrusion blocks 1148, when the second fixing plate 1144 corresponds to the ventilation grooves 1145 on the first fixing plate 1143, the second fixing plate 1144 cannot move upward any more, at this time the first springs 1147 start to contract, the extrusion blocks 1148 pass the stop blocks 1146, and then the mounting cylinder 131 continues to move upward, when the top of the mounting cylinder 131 contacts the trigger rod 143, the mounting cylinder 131 starts to drive the baffle 141 to move upward through the trigger rod 143, so that the centrifugal frame 111 is opened, and finally under the action of the driving frame 121 and the first driving cylinder 122, the centrifugal frame 111 moves to the position of the molten tin pool 200, starts to move downward and immerse in the molten tin pool 200, and after the temperature of the parts is consistent with the temperature of the tin liquid, the centrifugal frame 111 is lifted to leave the molten tin pool 200 and performs the centrifugal work.

[0077] It should be noted that there is a certain friction between the first fixed plate 1143 and the second fixed plate 1144, so that the second fixed plate 1144 cannot be reset by its own gravity after moving upward; before the centrifugal frame 111 is immersed in the molten tin pool 200, the oxide and impurities on the surface of the tin liquid are pushed to one side by a scraper on the molten tin pool 200, ensuring the quality of tin plating of the part; when the mounting cylinder 131 first drives the baffle 141 to move upward, due to the effect of the protrusion 142 on the trigger lever 143, the trigger lever 143 is not clamped into the clamping groove 145 on the mounting cylinder 131, and after centrifugal work, when the mounting cylinder 131 is secondly upward, due to the baffle 141 moving to the maximum height on the centrifugal frame 111, the protrusion 142 on the trigger lever 143 is clamped into the recess 144 on the clamping groove 145 through hard extrusion.

[0078] Further, as shown in Figures 1-2 and Figure 8 A complex part hot-dip centrifugal tin plating equipment also includes a protection mechanism 2 arranged on the molten tin pool 200, the protection mechanism 2 includes two groups of mounting racks 21 arranged on the molten tin pool 200, first arc-shaped plates 22 connected to the mounting racks 21, gear rings 23 connected to the first arc-shaped plates 22, second arc-shaped plates 24 connected to the gear rings 23, first transmission shafts 25 connected to the mounting racks 21, drive gears 26 connected to the first transmission shafts 25 and meshing with the gear rings 23, second transmission shafts 27 connected to the mounting racks 21 and arranged perpendicularly to the first transmission shafts 25, bevel gears 28 arranged on the first transmission shafts 25 and the second transmission shafts 27 respectively and meshing with each other, first racks 29 connected to the second U-shaped frames 124, and first gears 210 connected to the second transmission shafts 27 and meshing with the first racks 29.

[0079] It is worth mentioning here that by setting the protection mechanism 2 cooperating with the carrier 1, the part can quickly perform centrifugal work before the tin liquid solidifies after leaving the molten tin pool 200, ensuring the uniformity and lightness of the plating layer.

[0080] In detail, after the temperature of the part is consistent with the tin liquid, the centrifugal frame 111 reaches the position of the protection mechanism 2 under the driving of the driving frame 121 and the first driving cylinder 122, at this time, the first sawtooth ring 126 and the second sawtooth ring 127 are in a non-engaged state because the output end of the first driving cylinder 122 is not completely reset, thereby ensuring the stability of the centrifugal frame 111 during the centrifugal process. During the movement, the first rack 29 located on the second U-shaped frame 124 is engaged with the first gear 210 for transmission, and then the first driving gear 26 is driven to rotate through the second transmission shaft 27, the bevel gear 28 and the first transmission shaft 25 in sequence, the driving gear 26 drives the gear ring 23 engaged therewith to rotate, and then the second arc-shaped plate 24 is driven to rotate to form a circumferential space with the first arc-shaped plate 22 for centrifugal work; before the centrifugal work starts, the second driving cylinder 132 drives the mounting cylinder 131 to move downward to the position where the outlets of the plurality of air guide pipes 133 correspond to the ventilation groove 1145, and when the motor 123 drives the centrifugal frame 111 to start centrifugation, the fan 135 works to introduce airflow into the air guide pipe 133, and then the hot airflow is formed in cooperation with the heating wire 134 to assist the centrifugal work; after the centrifugal work is completed, the mounting cylinder 131 is moved upward again, so that the trigger rod 143 is clamped into the clamping groove 145, then the mounting cylinder 131 drives the partition plate 141 to move downward, and after the partition plate 141 is reset, the trigger rod 143 is separated from the clamping groove 145, and as the mounting cylinder 131 continues to move downward, the bottom of the extrusion block 1148 starts to extrude the stop block 1146, so that the second fixed plate 1144 is reset, the ventilation groove 1145 is closed, and finally the mounting cylinder 131 is reset, and at the same time, the plurality of positioning members 114 are reset under the action of the torsional spring member 1142.

[0081] Further, as shown in Figures 1-2 and Figure 9 , a complex part hot-dip centrifugal tin plating equipment also includes an output mechanism 3 arranged on the conveying device 300, the output mechanism 3 includes an L-shaped rod 31 connected to the conveying device 300, a second rack 32 connected to the L-shaped rod 31, a second gear 33 connected to the rotating shaft 110 and engaged with the second rack 32 for transmission, a limiting hole 34 opened on the rotating shaft 110, a limiting frame 36 connected to the second U-shaped frame 124 through a second spring 35 and clamped into the limiting hole 34, a blocking rod 37 connected to the L-shaped rod 31 and used for blocking the limiting frame 36, and a collection box 38 arranged on the conveying device 300.

[0082] In this embodiment, by arranging the output mechanism 3, the carrier 1 can drive the centrifugal frame 111 to complete the overturning during the movement, and then the parts inside are output, thereby improving the production efficiency.

[0083] In detail, when the carrier 1 moves away from the protection mechanism 2 and moves to the output mechanism 3, first, the limiting frame 36 connected to the second U-shaped frame 124 is blocked by the blocking rod 37 on the L-shaped rod 31, then one end of the limiting frame 36 is removed from the limiting hole 34 on the rotating shaft 110, then the second gear 33 connected to the rotating shaft 110 meshes with the second gear rack 32 on the L-shaped rod 31 to drive transmission, so that the rotating shaft 110 drives the first U-shaped frame 112 and the centrifugal frame 111 to overturn more than 90°, and finally the parts fall into the collection box 38 on the conveying device 300, and the driving frame 121 drives the carrier 1 to start resetting, and the limiting frame 36 is reinserted into the limiting hole 34 under the action of the second spring 35, and the centrifugal frame 111 is fixed.

[0084] Working steps

[0085] Step one, the driving assembly 12 drives the containing assembly 11 to move to the part loading position through the driving frame 121, and then a plurality of parts are loaded between the containing assembly 11 and the positioning piece 114, at this time a plurality of positioning pieces 114 are in an inclined and gathered state, after the parts are input, they are not evenly distributed between the centrifugal frame 111 and the gathered positioning piece 114, then the driving assembly 12 drives the centrifugal frame 111 to rotate through the motor 123, and the vibration generated by the interaction of the first sawtooth ring 126 and the second sawtooth ring 127 makes a plurality of parts evenly distributed in the centrifugal frame 111, and at the same time removes rust and oxides on the surface of the parts, when a plurality of parts complete the uniform distribution in the centrifugal frame 111, the second driving cylinder 132 in the auxiliary assembly 13 drives the mounting cylinder 131 to slowly move upward, in the process, a plurality of positioning pieces 114 gradually rotate to a vertical state, and the parts are also fixed between the positioning piece 114 and the centrifugal frame 111, then the cleaning liquid, the water and the flux are sequentially introduced into the space above the parts in the centrifugal frame 111, and the cleaning work is completed, and the cleaning liquid, the water and the flux injected during the cleaning process are gradually discharged from the gap reserved at the bottom of the positioning piece 114 in cooperation with the vibration;

[0086] Step two, after the cleaning is completed, the driving assembly 12 drives the containing assembly 11 to move above the molten tin pool 200 through the driving frame 121, and under the drive of the second driving cylinder 132 in the auxiliary assembly 13, the mounting cylinder 131 and the partition plate 141 are both moved upward to avoid, and the centrifugal frame 111 is completely opened, at this time the bottom of the mounting cylinder 131 still limits the position of a plurality of positioning pieces 114, then the parts are immersed in the molten tin pool together with the centrifugal frame 111, and after the temperature of the parts and the temperature of the tin liquid are consistent, they are lifted upward and quickly moved to the protection mechanism 2 for centrifugal work;

[0087] Step three, when the centrifugal frame 111 is moved to the position of the protection mechanism 2 and surrounded in the annular space, the second driving cylinder 132 drives the installation cylinder 131 to move downward alone and be flush with the positioning member 114. The positioning member 114 has been opened by the installation cylinder 131 when the installation cylinder 131 moves upward. When the centrifugal frame 111 starts to centrifuge, the installation cylinder 131 sprays hot air flow to guide the separation of the excess tin liquid, and assists the centrifugal work.

[0088] Step four, after the centrifugation is completed, the centrifugal frame 111 is driven by the driving frame 121 to move downward to the position of the output mechanism 3. The installation cylinder 131 moves upward and is embedded with the partition plate 141, and then moves downward. Subsequently, the partition plate 141, the ventilation slot 1145, the positioning member 114 and the installation cylinder 131 complete the reset in sequence. Then, under the action of the output mechanism 3, the centrifugal frame 111 is turned over more than 90° and the parts are discharged, and collected by the collection box 38 on the conveying device 300.

[0089] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hot-dip centrifugal tin plating equipment for complex components, characterized in that, The carrier is arranged on the frame; The carrier comprises a driving assembly arranged on the frame, a containing assembly installed on the driving assembly and located below the driving assembly, an auxiliary assembly arranged on the containing assembly and located at the center of the containing assembly, and an isolation assembly arranged in the cavity of the outer edge of the containing assembly; When the parts are tinned, the driving assembly drives the containing assembly to vibrate and rotate to divide the parts loaded in the containing assembly, and the auxiliary assembly drives the containing assembly to change the state to fix the parts from bottom to top at the outer edge of the containing assembly, after the parts are cleaned in the space formed by the containing assembly and the isolation assembly, the driving assembly drives the containing assembly and the parts to move and immerse in the molten tin pool, the parts leave the molten tin pool after the temperature of the parts is consistent with the temperature of the molten tin, the driving assembly drives the parts in the containing assembly to rotate and centrifuge, and the excess molten tin is discharged by cooperating with the hot air flow provided by the auxiliary assembly, and the parts are output for cooling after the centrifugation is completed.

2. A hot-dip centrifugal tin plating apparatus for a complex member according to claim 1, characterized in that, The containing assembly comprises a centrifugal frame for containing the parts, a first U-shaped frame connected to the centrifugal frame, a second U-shaped frame connected to the first U-shaped frame through a rotating shaft, an avoidance groove opened at the bottom of the centrifugal frame, and a plurality of positioning members arranged around the avoidance groove on the centrifugal frame and used for fixing the position of the parts.

3. A hot-dip centrifugal tin plating apparatus for a complex member according to claim 2, wherein The driving assembly comprises a driving frame connected to the frame, a first driving cylinder connected to the driving frame, a motor connected to the output end of the first driving cylinder, an extension connected to the output end of the motor and connected to the second U-shaped frame, a first sawtooth ring connected to the driving frame, and a second sawtooth ring connected to the second U-shaped frame and cooperating with the first sawtooth ring to drive the centrifugal frame to vibrate.

4. The apparatus according to claim 2, wherein The auxiliary assembly comprises a second driving cylinder connected to the first U-shaped frame and having an installation cylinder connected to the output end, a plurality of air guide pipes penetrating through the installation cylinder, heating wires connected to the air guide pipes, and a fan connected to the installation cylinder.

5. A hot-dip centrifugal tin plating apparatus for a complex member according to claim 4, wherein The isolation assembly comprises a partition plate connected to the centrifugal frame, two trigger rods connected to the partition plate and provided with protrusions, and a clamping groove provided with recesses and opened in the installation cylinder.

6. A hot-dip centrifugal tin plating apparatus for a complex member according to claim 4, wherein The positioning member comprises a mounting seat arranged on the centrifugal frame, a first fixing plate connected to the mounting seat through a torsional spring member, a second fixing plate connected to the first fixing plate, ventilation grooves respectively opened in the first fixing plate and the second fixing plate, a stop block connected to the second fixing plate, and a plurality of extrusion blocks connected to the installation cylinder through the first springs and corresponding to the stop blocks.

7. A hot-dip centrifugal tin plating apparatus for a complex member according to claim 2, wherein Further comprising a protection mechanism arranged on the molten tin pool, the protection mechanism comprises two installation frames arranged on the molten tin pool, a first arc-shaped plate connected to the installation frame, a tooth ring connected to the first arc-shaped plate, a second arc-shaped plate connected to the tooth ring, a first transmission shaft connected to the installation frame, a driving gear connected to the first transmission shaft and meshing with the tooth ring, a second transmission shaft connected to the installation frame and arranged perpendicularly to the first transmission shaft, bevel gears respectively arranged on the first transmission shaft and the second transmission shaft and meshing with each other, a first rack connected to the second U-shaped frame, and a first gear connected to the second transmission shaft and meshing with the first rack.

8. A hot-dip centrifugal tin plating apparatus for a complex member according to claim 2, wherein The output mechanism is arranged on the conveying device and comprises an L-shaped rod connected to the conveying device, a second rack connected to the L-shaped rod, a second gear connected to the rotating shaft and engaged with the second rack, a limiting hole arranged on the rotating shaft, a limiting frame connected to the second U-shaped frame by the second spring and clamped into the limiting hole, a blocking rod connected to the L-shaped rod and used for blocking the limiting frame, and a collection box arranged on the conveying device.

9. A tinning method based on the complex component hot-dip centrifugal tinning apparatus according to any one of claims 1 to 8, characterized by, The method comprises the following main steps: Step one, cleaning process, the driving assembly drives the containing assembly to move to the part loading position by the driving frame, multiple parts are loaded into the carrier, the driving assembly is started, the carrier vibrates while rotating, multiple parts are uniformly distributed on the outer edge of the carrier, cleaning liquid, clean water and flux are sequentially introduced into the carrier, and the cleaning work of multiple parts is completed; Step two, tinning process, after the cleaning process is completed, the driving assembly drives the containing assembly to move above the molten tin pool, the installation cylinder and the partition plate are both moved upward to avoid under the driving of the second driving cylinder in the auxiliary assembly, the centrifugal frame is completely opened, the bottom of the installation cylinder still limits the position of multiple positioning members at this time, then the parts are immersed into the molten tin pool together with the centrifugal frame to perform tinning; Step three, centrifugal process, the centrifugal frame drives the tinned parts to move to the protection mechanism position, the second driving cylinder drives the installation cylinder to move downward alone until it is flush with the positioning members, the ventilation groove on the positioning members is opened when the installation cylinder moves upward, as the centrifugal frame starts to centrifuge, the installation cylinder sprays hot air flow to guide the separation of excess tin liquid, so that a uniform and bright tinning layer is formed on the parts; Step four, output process, after the centrifugal process is completed, the centrifugal frame is driven by the driving frame to move to the output mechanism position, under the action of the output mechanism, the centrifugal frame is turned over and the parts are discharged, and the collection box on the conveying device is used for collecting.

10. The tinning method according to claim 9, characterized by In step three, the rotating speed of the high-speed centrifuge is 3000-10000 r / min.

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