CN112323131A

CN112323131A - Method for removing bubbles on surface of electroplated workpiece

Info

Publication number: CN112323131A
Application number: CN202011211742.0A
Authority: CN
Inventors: 李平
Original assignee: Chongqing Shengyingda Technology Development Co ltd
Current assignee: Chongqing Shengyingda Technology Development Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-02-05

Abstract

The invention provides a method for removing bubbles on the surface of an electroplating workpiece, which adopts a novel electroplating stirring device to carry out electroplating stirring and comprises the following specific steps: s01, fixing the workpiece to be plated and the plating metal in the novel electroplating stirring device; s02, adding electroplating solution into the feeding pipe, uniformly stirring the electroplating solution through the second stirring blade and the first stirring blade, and flushing the electroplating solution into the liquid inlet pipe; s03, filling the inner barrel with electroplating solution through the second circle of distribution holes; s04, turning on an electroplating power supply to carry out electroplating, wherein in the electroplating process, electroplating solution is sprayed out of the first spray pipe and the second spray pipe to disturb the surface of the workpiece and take away by-product bubbles; and S05, allowing the excessive electroplating solution to flow out through the overflow hole, uniformly mixing with the supplementary solution in the feeding pipe, and allowing the mixture to enter the distributor to realize electroplating solution circulation. The method can effectively remove bubbles on the surface of the workpiece while stirring, does not cause the workpiece to expose on the surface of the electroplating solution, and has the advantages of high electroplating efficiency, good electroplating quality and uniform distribution of the thickness of the electroplating film.

Description

Method for removing bubbles on surface of electroplated workpiece

Technical Field

The invention relates to the technical field of electroplating processing, in particular to a method for removing bubbles on the surface of an electroplating workpiece.

Background

Electroplating is an electrolytic reaction by which one metal is plated on the surface of another metal to form a metal shell film, and we refer to such a process as electroplating. The electroplating technology is widely applied to various purposes and fields. The development of the technology for forming a glossy film on the surface of a container from the early stage of decoration mainly with aesthetic features to the current high-tech industry, such as the semiconductor manufacturing process, is an indispensable technology in the current high-tech industry.

Side reactions are very easy to occur during electroplating: namely, hydrogen is generated at the cathode, oxygen is generated at the anode or other bubbles which are easily formed on the surface of the electroplated workpiece in an aggregation manner are generated at the anode, and the electroplated workpiece is isolated from the electroplating solution by the bubbles, so that the electroplating is not uniform or obvious traces exist on the electroplating surface, the electroplating quality is poor, the electroplating efficiency is low, and the phenomena of electroplating layer falling, cracking and the like even occur. In the prior art, when electroplating treatment is carried out, the electroplating solution is generally stirred to be uniformly mixed. Wherein, improving the stirring conditions (such as water flow stirring, air stirring, cathode stirring, ultrasonic stirring) can remove bubbles such as hydrogen, oxygen and the like on the surface of the cathode to a certain extent, and has the advantages of improving the electroplating efficiency, improving the film thickness distribution, eliminating the scorching phenomenon, avoiding the cracking of the electroplated layer and the like; however, with the improvement of the stirring condition, the stirring speed can be obviously increased, and the center of the container is easy to form vortex or wave drop, so that the workpiece to be plated has the risks of exposing the liquid level of the solution and oxidizing in the air; meanwhile, the improvement of the stirring condition can obviously increase the cost, is not beneficial to the control of the electroplating condition, and has complex operation and low application range.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a method for removing bubbles on the surface of an electroplating workpiece, the method is adopted for electroplating and stirring, the bubbles on the surface of the workpiece can be effectively removed while stirring, the workpiece cannot be exposed out of the surface of electroplating solution, the electroplating efficiency is high, the electroplating quality is good, and the thickness distribution of the electroplating film is uniform; meanwhile, the method is simple to operate, greatly saves the process cost and has strong practicability.

The purpose of the invention is realized by the following technical scheme:

a method for removing bubbles on the surface of an electroplating workpiece is characterized by comprising the following steps: electroplating stirring is carried out by adopting a novel electroplating stirring device, and the novel electroplating stirring device comprises an installation bracket, an electroplating barrel, a distributor and a stirring component; the electroplating barrel comprises an inner barrel, an outer barrel and a partition plate, the central axis of the inner barrel is collinear with the central axis of the outer barrel, a cavity is formed between the inner barrel and the outer barrel, a plurality of overflow holes are uniformly formed in the top end of the inner barrel, and the overflow holes are communicated with the cavity; the bottom of the outer barrel is fixedly connected with an installation support and used for fixedly installing the whole stirring device, and a feeding pipe is arranged on the left side of the outer barrel and penetrates through the wall of the outer barrel and is communicated with the cavity; the baffle is positioned in the cavity, the width of the baffle is consistent with the width of the cavity, and the baffle is used for partitioning the cavity, the baffle is of an integrally formed structure and consists of a semicircular annular plate and two vertical plates, the semicircular annular plate is positioned at one side close to the feeding pipe, the central axis of the semicircular annular plate is collinear with the central axis of the inner barrel, the two vertical plates are respectively connected with two ends of the semicircular annular plate, and one end, away from the semicircular annular plate, of each vertical plate is connected with the inner wall of the bottom of the outer barrel; the distributor is fixedly connected with the bottom of the inner wall of the inner barrel, is of a circular truncated cone-shaped structure, and is hollow inside; the top surface of the distributor is uniformly distributed with three circles of distribution holes in an annular manner, and a first circle of distribution holes, a second circle of distribution holes and a third circle of distribution holes are arranged outwards from the circle center of the distributor in sequence; the first circle of distribution holes are fixedly connected with a first spray pipe, the first spray pipe extends out of the top surface of the distributor, the third circle of distribution holes are fixedly connected with a second spray pipe, the second spray pipe extends out of the top surface of the distributor, and the length of the second spray pipe is longer than that of the first spray pipe; the bottom of the distributor is communicated with a liquid inlet pipe, and the liquid inlet pipe sequentially penetrates through the inner cylinder and the outer cylinder and is communicated with the stirring assembly; the first spray pipe is provided with a first one-way circulation valve, the second spray pipe is provided with a second one-way circulation valve, the liquid inlet pipe is provided with a third one-way circulation valve, and the second ring of distribution holes are provided with a closing baffle plate for controlling the closing and opening of the second ring of distribution holes; the top surface of the distributor is provided with a first fixing support used for fixing a workpiece to be plated; the inner wall of the inner cylinder is provided with a second fixing support for fixing the plating metal; the stirring assembly comprises a feeding channel, a stirring cavity and a return channel, and a fourth one-way circulation valve and a fifth one-way circulation valve are respectively arranged on the feeding channel and the return channel; the feeding channel is positioned on the left side of the stirring cavity and communicated with the left side of the stirring cavity, one end of the feeding channel, which is far away from the stirring cavity, is communicated with the cavity, a motor driving cavity is arranged in the feeding channel, the motor driving cavity is fixedly connected with the inner wall of the feeding channel through a first supporting rod, a driving motor is arranged in the motor driving cavity, the output end of the driving motor is fixedly connected with an output shaft, and the output shaft penetrates out of the motor driving cavity and is positioned in the stirring cavity; the feed back channel is positioned on the right side of the stirring cavity and is communicated with the right side of the stirring cavity, and one end of the feed back channel, which is far away from the stirring cavity, is communicated with the cavity; the middle part of the upper end of the stirring cavity is communicated with the liquid inlet pipe, one side of the stirring cavity close to the feed back channel is provided with a fixed circular plate, the fixed circular plate is fixedly connected with the inner wall of the stirring cavity through a second support rod, the diameter of the fixed circular plate is smaller than that of the feed back channel, one end of the output shaft far away from the driving motor is rotatably connected with the fixed circular plate, the left side of the fixed circular plate is sleeved with a driving gear, the driving gear is meshed with three output gears, the three output gears are respectively sleeved on three rotating shafts, the three rotating shafts are respectively fixedly connected with the fixed circular plate and the central points of the three rotating shafts are connected to form an equilateral triangle, one end of the three output gears far away from the driving gear is meshed with a gear ring, and the gear ring is rotatably connected with the fixed, the outer wall of the gear ring is fixedly connected with a first stirring blade; a second stirring blade is fixedly connected to the outer wall of the output shaft and one side of the output shaft close to the motor driving cavity, and the second stirring blade is positioned in the stirring cavity;

the electroplating stirring method comprises the following specific steps:

s01, fixedly mounting the workpiece to be plated on a first fixing support, fixedly mounting the plating metal on a second fixing support, and connecting the workpiece to be plated with the cathode of the power supply and the plating metal with the anode of the power supply;

s02, adding electroplating solution into the feeding pipe, opening a fourth one-way circulation valve and a fifth one-way circulation valve, simultaneously opening a power supply of a driving motor, driving the output shaft to rotate by the rotation of the driving motor, further driving a second stirring blade and a driving gear to rotate, and driving the three output gears to rotate by the driving gear so as to drive a gear ring and a first stirring blade to rotate; the electroplating solution in the stirring cavity is uniformly mixed through the impact force between the second stirring blade and the first stirring blade, and the mixed electroplating solution is flushed into the liquid inlet pipe;

s03, after the electroplating solution is uniformly mixed, opening a third one-way flow valve and a closing baffle, pressing the electroplating solution into the distributor under the action of the impulsive force of the first stirring blade and the second stirring blade, and enabling the electroplating solution to flow into the inner cylinder from the second circle of distribution holes at first;

s04, after the workpiece to be plated and the plating metal are completely immersed in the liquid level of the electroplating liquid, starting an electroplating power supply to carry out electroplating; in the electroplating process, the first one-way circulation valve and the second one-way circulation valve are opened, the closing baffle is closed, the electroplating solution is sprayed out from the first spray pipe and the second spray pipe, and the sprayed electroplating solution forms certain disturbance on the surface of a workpiece to be plated, so that bubbles generated on the surface of the workpiece are taken away; the spraying of workpieces in different shapes and different planes is realized through the difference of the lengths and the radians of the first spray pipe and the second spray pipe;

s05, when the electroplating solution reaches the height of the overflow hole, the redundant electroplating solution flows out through the overflow hole, then enters the stirring cavity through the feed back channel and the first stirring blade, is supplemented for the concentration of the electroplating solution through the feeding channel, fully stirs and mixes the electroplating solutions with different concentrations through the first stirring blade and the second stirring blade, and flushes the electroplating solution into the distributor, so that the cyclic utilization of the electroplating solution is realized.

Further optimization, the junction of the feeding pipe and the outer barrel is provided with a sealing ring to prevent liquid in the feeding pipe from flowing out.

For further optimization, the semicircular annular plate is an inclined plate, and one end of the semicircular annular plate, which is far away from the vertical plate, is higher than one end of the semicircular annular plate, which is close to the vertical plate; and the joint of the semicircular annular plate and the vertical plate is in arc connection.

Preferably, the first fixing support and the second fixing support are made of insulating materials.

For further optimization, the first spray pipe is a straight pipe; the end part of one end, far away from the distributor, of the second spray pipe is an elbow pipe, and the elbow pipe is bent towards one side close to the central axis of the inner barrel.

Further optimization is carried out, the connection part of the liquid inlet pipe and the inner barrel and the connection part of the outer barrel are both provided with sealing rings, so that liquid is prevented from leaking.

And the output end of the driving motor is fixedly connected with the output shaft through a coupler.

Further optimization is carried out, the output shaft is rotatably connected with the motor driving cavity through a first bearing, and a sealing ring is arranged at the first bearing.

The output shaft is rotationally connected with the fixed circular plate through a second bearing, the second bearing is fixed at the central position of the fixed circular plate, and the inner wall of the second bearing is sleeved on the outer wall of the output shaft.

And further optimizing, wherein the central axis of the output shaft is collinear with the central axis of the fixed circular plate.

Further optimization is carried out, the number of the first supporting rods is 3-6, and the first supporting rods are uniformly distributed on the outer wall of the motor driving cavity.

Further optimization, the number of the second supporting rods is 3-6, and the second supporting rods are uniformly distributed between the fixed circular plate and the stirring cavity.

Further optimization, first stirring vane is fan-shaped blade, and its evenly distributed is in the gear ring outer wall, its quantity is 5 ~ 10 pieces.

Further optimization, the second stirring blades are fan-shaped blades which are uniformly distributed on the outer wall of the output shaft, and the number of the second stirring blades is 5-10.

Further optimization is carried out, the gear ring is close to one side of fixed plectane sets up annular arris, fixed plectane is close to one side of gear ring corresponds annular arris sets up the annular guide rail groove, annular arris card is gone into the annular guide rail inslot just can be at annular guide rail inslot rotation.

Further optimization, a waste material pipe is arranged at the bottom of the stirring cavity and is communicated with an external waste material collecting device; and the waste pipe is provided with a stop valve.

Further optimization is carried out, after the electroplating is finished in the electroplating stirring method, the electroplating power supply and the driving motor power supply are closed, and the workpiece to be plated and the plating metal are taken out; and opening the stop valve, and collecting the waste liquid after electroplating.

The invention has the following technical effects:

the method drives the second stirring blade by the rotation of the driving motor, and realizes the rotation of the first stirring blade by the matching of the output shaft, the fixed circular plate, the driving gear, the output gear and the gear ring, and the electroplating solution introduced into the feeding channel is uniformly mixed because the first stirring blade and the second stirring blade rotate in opposite directions and generate opposite thrust action, and then the mixed electroplating solution is input into the inner wall of the inner cylinder through the distributor to carry out the electroplating process. Because the setting of first spray tube and second spray tube, the plating solution at first oozes from the second circle distribution hole, fills the inner tube bottom, and when the complete submergence, the plating solution from first spray tube, second spray tube blowout, first spray tube and second spray tube spun plating solution possess certain flow velocity relatively to treat to plate the work piece surface and have certain disturbance at the electroplating process, and then take away the bubble that the work piece surface produced, promote electroplating quality. At the same time. The plating solution is spouted from the bottom of the whole device, flows upwards, and above the plating solution spouting part, the liquid level of the plating solution can rise or has a rising trend, thereby ensuring that the whole workpiece is always immersed in the plating solution, and avoiding the phenomenon that the workpiece is exposed out of the liquid level due to the transient disturbance of the plating solution to cause the reduction of the plating quality. Excessive plating solution flows through the overflow hole, and rethread feed back passageway and first stirring vane get into the stirring intracavity, replenish the concentration of plating solution through reinforced passageway simultaneously, carry out the intensive mixing through first stirring vane and second stirring vane to the plating solution of different concentrations and mix, improve the homogeneity of plating solution concentration, realize the cyclic utilization of plating solution, guarantee that the plating solution concentration of electroplating in-process remains the unanimity throughout to improve electroplating efficiency and electroplating quality.

The method realizes the circulating stirring effect on the electroplating solution through the internal flow channel of the whole device, does not use a complex mechanical device, occupies small space, has short flow channel distance for the electroplating solution to flow through, has short circulation time, does not obviously increase the volume of an electroplating pool, has high electroplating efficiency and wide application range; in addition, the method is simple to operate, and the process cost is greatly saved.

Drawings

FIG. 1 is a schematic view of the overall structure of a plating stirring apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the entire structure of the plating stirring apparatus according to the embodiment of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

FIG. 4 is a schematic structural diagram of a partition plate of the electroplating stirring apparatus according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view of a stirring assembly of the plating stirring apparatus in an embodiment of the present invention.

Fig. 6 is a sectional view taken along line B-B of fig. 5.

FIG. 7 is an enlarged view of a gear ring and a fixed circular plate of the electroplating stirring device in the embodiment of the invention.

Fig. 8 is a sectional view taken along line C-C of fig. 7.

Wherein, 1, installing a bracket; 2. electroplating a cylinder; 21. an outer cylinder; 211. a feed tube; 22. an inner barrel; 221. an overflow aperture; 23. a partition plate; 231. a semicircular annular plate; 232. a vertical plate; 24. a cavity; 3. a dispenser; 31. a first ring of distribution holes; 311. a first nozzle; 32. a second ring of dispensing apertures; 33. a third ring of dispensing apertures; 331. a second nozzle; 34. a liquid inlet pipe; 4. a stirring assembly; 41. a charging channel; 411. a motor drive cavity; 412. a first support bar; 413. a drive motor; 414. an output shaft; 415. a second stirring blade; 42. a stirring chamber; 421. fixing the circular plate; 4211. an annular guide rail groove; 422. a second support bar; 423. a gear ring; 4231. an annular ridge; 424. a first stirring blade; 425. a drive gear; 426. an output gear; 427. a rotating shaft; 428. a waste pipe; 43. a feed back channel; 5. and (5) a workpiece to be plated. Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1 to 8, a method for removing bubbles on the surface of an electroplating workpiece is characterized in that: a novel electroplating stirring device is adopted for electroplating stirring, and comprises a mounting bracket 1, an electroplating barrel 2, a distributor 3 and a stirring assembly 4; the electroplating barrel 2 comprises an inner barrel 22, an outer barrel 21 and a partition plate 23, the central axis of the inner barrel 22 is collinear with the central axis of the outer barrel 21, a cavity 24 is formed between the inner barrel 22 and the outer barrel 21, a plurality of overflow holes 221 are uniformly formed in the top end of the inner barrel 22, and the overflow holes 221 are communicated with the cavity 24; the bottom of the outer cylinder 21 is fixedly connected with the mounting bracket 1 and used for fixedly mounting the whole stirring device, the left side of the outer cylinder 21 is provided with a feeding pipe 211, and the feeding pipe 211 penetrates through the cylinder wall of the outer cylinder 21 and is communicated with the cavity 24; a sealing ring (not shown in the figures, and a conventional sealing ring in the field, such as a rubber sealing ring, is adopted) is arranged at the joint of the feeding pipe 211 and the outer cylinder 21 to prevent the liquid in the feeding pipe from flowing out. The baffle 23 is positioned in the cavity 24, the width of the baffle 23 is consistent with that of the cavity 24, the baffle 23 is used for separating the cavity 24, the baffle 23 is of an integrally formed structure and comprises a semicircular annular plate 231 and two vertical plates 232, the semicircular annular plate 231 is positioned at one side close to the feeding pipe 211, the central axis of the semicircular annular plate 231 is collinear with that of the inner cylinder 22, the two vertical plates 232 are respectively connected with two ends of the semicircular annular plate 231, and one end, far away from the semicircular annular plate 231, of each vertical plate 232 is connected with the inner wall of the bottom of the outer cylinder 21; the semicircular annular plate 231 is an inclined plate, and one end of the semicircular annular plate, which is far away from the vertical plate 232, is higher than one end of the semicircular annular plate, which is close to the vertical plate 232; and the connection part of the semicircular annular plate 231 and the vertical plate 232 is in arc connection. The distributor 3 is fixedly connected with the bottom of the inner wall of the inner cylinder 22, and the distributor 3 is of a circular truncated cone-shaped structure and is hollow inside; the top surface of the distributor 3 is uniformly distributed with three circles of distribution holes in an annular manner, and a first circle of distribution holes 31, a second circle of distribution holes 32 and a third circle of distribution holes 33 are arranged outwards in sequence from the circle center position of the distributor 3; the first circle of distribution holes 31 are fixedly connected with the first spray pipe 311, the first spray pipe 311 extends out of the top surface of the distributor 3, the third circle of distribution holes 33 are fixedly connected with the second spray pipe 331, the second spray pipe 331 extends out of the top surface of the distributor 3, and the length of the second spray pipe 331 is longer than that of the first spray pipe 311; the first nozzle 311 is a straight pipe; the end of the second nozzle 331 away from the distributor 3 is a bent pipe, and the bent pipe is bent to a side close to the central axis of the inner cylinder 22. A closing baffle (not shown) is arranged at the second circle of distribution holes 32 and used for controlling the closing and the opening of the second circle of distribution holes 32. The bottom of the distributor 3 is communicated with a liquid inlet pipe 34, and the liquid inlet pipe 34 sequentially penetrates through the inner cylinder 22 and the outer cylinder 21 and is communicated with the stirring component 4; sealing rings (not marked in the figure, and conventional sealing rings in the field such as rubber sealing rings are adopted) are arranged at the joint of the liquid inlet pipe 34 and the inner cylinder 22 and the joint of the outer cylinder 21, so that liquid is prevented from leaking. A first fixing bracket (not marked in the figure) is arranged on the top surface of the distributor 3 and used for fixing a workpiece to be plated; a second fixing bracket (not marked in the figure) is arranged on the inner wall of the inner cylinder 22 and used for fixing the plating metal; the first fixing support and the second fixing support are both made of insulating materials. The first nozzle 311 is provided with a first one-way flow valve, the second nozzle 331 is provided with a second one-way flow valve, and the liquid inlet pipe 34 is provided with a third one-way flow valve (the first one-way flow valve, the second one-way flow valve and the third one-way flow valve are not marked in the figures, and the one-way flow valve is conventional in the field). Stirring subassembly 4 includes reinforced passageway 41, stirring chamber 42 and feed back passageway 43, reinforced passageway 41 is located stirring chamber 42 left side and communicates with stirring chamber 42 left side, reinforced passageway 41 is kept away from the one end and the cavity 24 intercommunication of stirring chamber 42, set up motor drive chamber 411 in reinforced passageway 41, motor drive chamber 411 is through first bracing piece 412 and reinforced passageway 41 inner wall fixed connection, first bracing piece 412 is 3 ~ 6, preferably 4, its evenly distributed is at motor drive chamber 411 outer wall. A driving motor 413 is arranged in the motor driving cavity 411, the output end of the driving motor 413 is fixedly connected with an output shaft 414 through a coupler, and the output shaft 414 penetrates out of the motor driving cavity 411 and is positioned in the stirring cavity 42; the output shaft 414 is rotatably connected to the motor driving chamber 411 through a first bearing, and a sealing ring (not shown in the drawings, and a sealing ring in the prior art, such as a rubber sealing ring, is used) is disposed at the first bearing. The material returning channel 43 is positioned at the right side of the stirring cavity 42 and is communicated with the right side of the stirring cavity 42, and one end of the material returning channel 43, which is far away from the stirring cavity 42, is communicated with the cavity 24; the middle part of the upper end of the stirring cavity 42 is communicated with the liquid inlet pipe 34, one side of the stirring cavity 42, which is close to the material return channel 43, is provided with a fixed circular plate 421, the fixed circular plate 421 is fixedly connected with the inner wall of the stirring cavity 42 through a second support rod 422, the diameter of the fixed circular plate 421 is smaller than that of the material return channel 43, the number of the second support rods 522 is 3-6, preferably 3, and the second support rods are uniformly distributed between the fixed circular plate 421 and the stirring cavity 42. One end of the output shaft 414 far away from the driving motor 413 is rotatably connected with the fixed circular plate 421 through a second bearing, the second bearing is fixed at the central position of the fixed circular plate 421, and the inner wall of the second bearing is sleeved on the outer wall of the output shaft 414; the central axis of the output shaft 414 is collinear with the central axis of the fixed disk 421. A driving gear 425 is sleeved on the left side of the fixed circular plate 421 and the output shaft 414, the driving gear 425 is meshed with three output gears 426, the three output gears 426 are respectively sleeved on three rotating shafts 427, the three rotating shafts 427 are respectively and fixedly connected with the fixed circular plate 421, the central points of the three rotating shafts 427 are connected to form an equilateral triangle, one ends of the three output gears 426, far away from the driving gear 425, are meshed with a gear ring 423, the gear ring 423 is rotatably connected with the fixed circular plate 421, and the outer wall of the gear ring 423 is fixedly connected with a first stirring blade 424; the side surface of the gear ring 423 close to the fixed circular plate 421 is provided with an annular ridge 4231, the side surface of the fixed circular plate 421 close to the gear ring 423 is provided with an annular guide rail groove 4211 corresponding to the annular ridge 4231, and the annular ridge 4231 is clamped into the annular guide rail groove 4211 and can rotate in the annular guide rail groove 4211. The first stirring blades 424 are fan-shaped blades, and are uniformly distributed on the outer wall of the gear ring 423, and the number of the first stirring blades is 5-10, preferably 6. A second stirring blade 415 is fixedly connected to the outer wall of the output shaft 414 and one side close to the motor driving cavity 411, and the second stirring blade 415 is located in the stirring cavity 42; the second stirring blades 415 are fan-shaped blades, and are uniformly distributed on the outer wall of the output shaft 414, and the number of the second stirring blades is 5-10, preferably 6. At the bottom of the stir chamber 42 is disposed a waste pipe 428 which communicates with an external waste collection device. The charging channel 41 and the return channel 43 are respectively provided with a fourth one-way flow valve and a fifth one-way flow valve, and the waste pipe 428 is provided with a stop valve (the fourth one-way flow valve, the fifth one-way flow valve and the stop valve are not marked, and the conventional one-way flow valve and the stop valve in the field can be adopted).

The electroplating stirring method comprises the following specific steps:

s01, fixedly mounting the workpiece 5 to be plated on a first fixing support, fixedly mounting the plated metal on a second fixing support, and connecting the workpiece 5 to be plated with the cathode of a power supply and the plated metal with the anode of the power supply;

s02, adding the electroplating solution into the feeding tube 211, opening the fourth one-way flow valve and the fifth one-way flow valve, and simultaneously opening the power supply of the driving motor 413, the driving motor 413 rotates to drive the output shaft 414 to rotate, and further drive the second stirring blade 415 and the driving gear 425 to rotate, the driving gear 425 drives the three output gears 426 to rotate, thereby driving the gear ring 423 and the first stirring blade 424 to rotate, the second stirring blade 415 and the first stirring blade 424 rotate in opposite directions and at the same rotation speed, thereby generating a relative impact force, and further realizing uniform mixing of the electroplating solution in the stirring chamber 42 by the stirring force and the impact force, and simultaneously flushing the mixed electroplating solution into the liquid inlet tube 34 by the impact force;

s03, after the electroplating solution is uniformly mixed, opening a third one-way flow valve and a closing baffle, and pressing the uniformly mixed electroplating solution into the distributor 3 under the action of the impact force of the two blades, so that the electroplating solution flows into the inner cylinder from the second circle of distribution holes 32;

s04, completely immersing the workpiece 5 to be plated and the plating metal in the liquid level of the plating solution, starting an electroplating power supply to carry out electroplating, simultaneously starting a first one-way flow valve and a second one-way flow valve, and closing a closed baffle in the electroplating process, wherein the plating solution is sprayed out from a first spray pipe 311 and a second spray pipe 331, and the plating solution sprayed out from the first spray pipe 311 and the second spray pipe 331 has a certain relative flow speed, so that the plating solution flowing through the surface of the workpiece 5 to be plated has certain disturbance, and bubbles generated on the surface of the workpiece are taken away; the spraying to workpieces in different shapes and different planes is realized through the difference of the lengths and radians of the first spray pipe 311 and the second spray pipe 331;

s05, when the plating solution reaches the height of the overflow hole 221, the excessive plating solution flows out through the overflow hole 221, then enters the stirring chamber through the return channel 43 and the first stirring blade 424 (due to the obstruction of the baffle plate 23, the plating solution flowing out from the overflow hole 221 near the side of the feed tube 211 flows to the return channel 43 through the diversion effect of the baffle plate 23), meanwhile, the concentration of the electroplating solution is supplemented through the feeding channel 41 (the feeding channel 41 and the feeding pipe 211 are on the same side, so that the electroplating solution added in the feeding pipe 211 directly enters the feeding channel), the electroplating solutions with different concentrations are fully stirred and mixed through the first stirring blade 424 and the second stirring blade 415, the uniformity of the concentration of the electroplating solution is improved, then the electroplating solution enters the distributor 3 through the liquid inlet pipe 34, so that the cyclic utilization of the electroplating solution is realized, the consistency of the concentration of the electroplating solution is ensured, and the electroplating quality and the electroplating efficiency are further ensured;

and S06, after the electroplating is finished, closing the power supply of the electroplating power supply and the power supply of the driving motor 413, taking out the workpiece 5 to be plated and the plating metal, opening the stop valve, and collecting the waste liquid after the electroplating.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A method for removing bubbles on the surface of an electroplating workpiece is characterized by comprising the following steps: electroplating stirring is carried out by adopting a novel electroplating stirring device, and the novel electroplating stirring device comprises a mounting bracket (1), an electroplating cylinder (2), a distributor (3) and a stirring component (4); the electroplating barrel (2) comprises an inner barrel (22), an outer barrel (21) and a partition plate (23), the central axis of the inner barrel (22) and the central axis of the outer barrel (21) are collinear, a cavity (24) is formed between the inner barrel (22) and the outer barrel (21), a plurality of overflow holes (221) are uniformly formed in the top end of the inner barrel (22), and the overflow holes (221) are communicated with the cavity (24); the bottom of the outer cylinder (21) is fixedly connected with the mounting bracket (1), a feeding pipe (211) is arranged on the left side of the outer cylinder (21), and the feeding pipe (211) penetrates through the cylinder wall of the outer cylinder (21) and is communicated with the cavity (24); the baffle (23) is positioned in the cavity (24), the width of the baffle is consistent with that of the cavity (24), the baffle (23) is of an integrally formed structure and consists of a semicircular annular plate (231) and two vertical plates (232), the semicircular annular plate (231) is positioned on one side close to the feeding pipe (211), the central axis of the semicircular annular plate (231) is collinear with that of the inner cylinder (22), the two vertical plates (232) are respectively connected with two ends of the semicircular annular plate (231), and one end, away from the semicircular annular plate (231), of each vertical plate (232) is connected with the inner wall of the bottom of the outer cylinder (21); the distributor (3) is fixedly connected with the bottom of the inner wall of the inner barrel (22), and the distributor (3) is of a circular truncated cone-shaped structure and is hollow inside; the top surface of the distributor (3) is uniformly distributed with three circles of distribution holes in an annular manner, and a first circle of distribution holes (31), a second circle of distribution holes (32) and a third circle of distribution holes (33) are arranged from the circle center position of the distributor to the outside in sequence; the first circle of distribution holes (31) are fixedly connected with a first spray pipe (311), the first spray pipe (311) extends out of the top surface of the distributor (3), the third circle of distribution holes (33) are fixedly connected with a second spray pipe (331), the second spray pipe (331) extends out of the top surface of the distributor (3), and the length of the second spray pipe (331) is longer than that of the first spray pipe (311); the bottom of the distributor (3) is communicated with a liquid inlet pipe (34), and the liquid inlet pipe (34) sequentially penetrates through the inner cylinder (22) and the outer cylinder (21) and is communicated with the stirring component (4); a first one-way flow valve is arranged on the first spray pipe (311), a second one-way flow valve is arranged on the second spray pipe (331), a third one-way flow valve is arranged on the liquid inlet pipe (34), and a closed baffle is arranged at the second circle of distribution holes (32); a first fixing bracket is arranged on the top surface of the distributor (3); a second fixed bracket is arranged on the inner wall of the inner cylinder (22); the stirring assembly (4) comprises a feeding channel (41), a stirring cavity (42) and a return channel (43), wherein a fourth one-way circulation valve and a fifth one-way circulation valve are respectively arranged on the feeding channel (41) and the return channel (43); the feeding channel (41) is located on the left side of the stirring cavity (42) and communicated with the left side of the stirring cavity (42), one end, far away from the stirring cavity (42), of the feeding channel (41) is communicated with the cavity (24), a motor driving cavity (411) is arranged in the feeding channel (41), the motor driving cavity (411) is fixedly connected with the inner wall of the feeding channel (41) through a first supporting rod (412), a driving motor (413) is arranged in the motor driving cavity (411), the output end of the driving motor (413) is fixedly connected with an output shaft (414), and the output shaft (414) penetrates out of the motor driving cavity (411) and is located in the stirring cavity (42); the feed back channel (43) is positioned at the right side of the stirring cavity (42) and is communicated with the right side of the stirring cavity (42), and one end, away from the stirring cavity (42), of the feed back channel (43) is communicated with the cavity (24); the middle part of the upper end of the stirring cavity (42) is communicated with the liquid inlet pipe (34), one side of the stirring cavity (42) close to the material return channel (43) is provided with a fixed circular plate (421), the fixed circular plate (421) is fixedly connected with the inner wall of the stirring cavity (42) through a second support rod (422), the diameter of the fixed circular plate (421) is smaller than that of the material return channel (43), one end of the output shaft (414) far away from the driving motor (413) is rotatably connected with the fixed circular plate (421), the left side of the fixed circular plate (421) and the output shaft (414) are sleeved with a driving gear (425), the driving gear (425) is meshed with three output gears (426), the three output gears (426) are respectively sleeved on three rotating shafts (427), the three rotating shafts (427) are respectively fixedly connected with the fixed circular plate (421), and the central points of the three rotating shafts (427) are connected to form a triangle, one ends of the three output gears (426) far away from the driving gear (425) are meshed with a gear ring (423), the gear ring (423) is rotatably connected with the fixed circular plate (421), and the outer wall of the gear ring (423) is fixedly connected with a first stirring blade (424); a second stirring blade (415) is fixedly connected to one side, close to the motor driving cavity (411), of the outer wall of the output shaft (414), and the second stirring blade (415) is located in the stirring cavity (42);

the electroplating stirring method comprises the following specific steps:

s01, fixedly mounting the workpiece (5) to be plated on a first fixing support, fixedly mounting the plated metal on a second fixing support, and connecting the workpiece (5) to be plated with the cathode of a power supply and the plated metal with the anode of the power supply;

s02, adding electroplating solution into the feeding pipe (211), starting a fourth one-way circulation valve and a fifth one-way circulation valve, simultaneously starting a power supply of a driving motor (413), wherein the driving motor (413) rotates to drive an output shaft (414) to rotate, so that a second stirring blade (415) and a driving gear (425) are driven to rotate, and the driving gear drives three output gears (426) to rotate, so that a gear ring (423) and a first stirring blade (424) are driven to rotate; the electroplating solution in the stirring cavity (42) is uniformly mixed through the impact force between the second stirring blade (415) and the first stirring blade (424) and the mixed electroplating solution is flushed into the liquid inlet pipe (34);

s03, after the electroplating solution is uniformly mixed, opening a third one-way flow valve and a closing baffle, pressing the electroplating solution into a distributor (3) under the action of the impulsive force of a first stirring blade (424) and a second stirring blade (415), and enabling the electroplating solution to flow into the inner cylinder (22) from the second circle of distribution holes (32) at first;

s04, after the workpiece (5) to be plated and the plating metal are completely immersed in the liquid level of the electroplating liquid, starting an electroplating power supply to carry out electroplating; in the electroplating process, the first one-way circulation valve and the second one-way circulation valve are opened, the closing baffle is closed, the electroplating solution is sprayed out from the first spray pipe (311) and the second spray pipe (331), and the sprayed electroplating solution forms certain disturbance on the surface of the workpiece (5) to be plated, so that bubbles generated on the surface of the workpiece are taken away; the spraying of workpieces with different shapes and different planes is realized through the difference of the lengths and the radians of the first spray pipe (311) and the second spray pipe (331);

s05, when the electroplating solution reaches the height of the overflow hole (221), the excessive electroplating solution flows out through the overflow hole (221), then enters the stirring chamber (42) through the feed back channel (43) and the first stirring blade (424), supplements the concentration of the electroplating solution through the feed back channel (41), fully stirs and mixes the electroplating solution with different concentrations through the first stirring blade (424) and the second stirring blade (415), and flushes the electroplating solution into the distributor (3), so that the cyclic utilization of the electroplating solution is realized.

2. A method for removing bubbles from the surface of a plated workpiece according to claim 1, wherein: and a sealing ring is arranged at the joint of the feeding pipe (211) and the outer barrel (21).

3. A method for removing bubbles from the surface of a plated workpiece according to claim 1, wherein: the first fixing support and the second fixing support are both made of insulating materials.

4. A method for removing bubbles from the surface of a plated workpiece according to claim 1, wherein: the first nozzle (311) may be a straight pipe; the end part of one end, far away from the distributor (3), of the second spray pipe (331) can be an elbow pipe, and the elbow pipe is bent towards one side close to the central axis of the inner cylinder (22).

5. A method for removing bubbles from the surface of a plated workpiece according to claim 1, wherein: and sealing rings are arranged at the joint of the liquid inlet pipe (34) and the inner cylinder (22) and the joint of the outer cylinder (21).

6. A method for removing bubbles from the surface of a plated workpiece according to claim 1, wherein: the output end of the driving motor (413) can be fixedly connected with the output shaft (414) through a coupler.

7. A method for removing bubbles from the surface of a plated workpiece according to claim 1, wherein: the central axis of the output shaft (414) can be collinear with the central axis of the fixed circular plate (421).

8. A method for removing bubbles from the surface of a plated workpiece according to claim 1, wherein: gear ring (423) are close to one side of fixed plectane (421) sets up annular arris (4231), fixed plectane (421) are close to one side of gear ring (423) corresponds annular arris (4231) set up annular guide rail groove (4211), annular arris (4231) card is gone into just can be at annular guide rail groove (4211) internal rotation in annular guide rail groove (4211).

9. A method for removing bubbles from the surface of a plated workpiece according to claim 1, wherein: a waste material pipe (428) is arranged at the bottom of the stirring cavity (42), and the waste material pipe (428) is communicated with an external waste material collecting device; a stop valve is arranged on the waste pipe (428).

10. A method for removing bubbles from the surface of a plated workpiece according to claim 9, wherein: after the electroplating is finished in the electroplating stirring method, the electroplating power supply and the driving motor power supply are closed, and a workpiece (5) to be plated and the plating metal are taken out; and opening the stop valve, and collecting the waste liquid after electroplating.