Electroplating solution heating mechanism for aluminum alloy silver plating

Abstract

The utility model provides an electroplating liquid heating mechanism for aluminum alloy silver plating, which relates to the technical field of electroplating liquid heating and comprises an electroplating tank, condensing equipment, a thermocouple fixedly arranged in the electroplating tank, a temperature control relay electrically connected with the thermocouple, a base, a coil pipe, a steam generator, a mounting frame and an airflow disturbance component, the electroplating liquid can be heated by combining the external snakelike winding heat tracing coil pipe with steam, so that corrosion caused by direct contact of the coil pipe with the electroplating liquid can be avoided, meanwhile, subsequent maintenance is convenient, airflow disturbance can be performed on the electroplating liquid on the basis of external heat tracing, the heating efficiency is optimized through dynamic heat exchange, and the service life of the electroplating liquid is prolonged. Therefore, the electroplate liquid is integrally heated uniformly, the defect of temperature difference is reduced, and the heating effect of the electroplate liquid is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to electroplating liquid heating technical field, specifically, relate to a kind of electroplating liquid heating mechanism for aluminum alloy silver plating. BACKGROUND

[0002] Currently in the production process of aluminum alloy needs to be plated on its surface silver, electroplated silver layer can significantly reduce the contact resistance of aluminum alloy surface, applicable to high-precision electronic components (such as sensor, connector, electric switch contact), in addition, silver plating layer can improve the welding bonding force of aluminum alloy and other materials, ensure the reliability of electronic component connection, reduce the risk of false welding.

[0003] Currently in the process of electroplating silver on aluminum alloy needs to heat electroplating liquid, heating electroplating liquid can improve the activity of metal ions, enhance electrochemical deposition efficiency, shorten silver plating time, reduce energy consumption, while temperature rises, silver ion migration speed in electrolyte accelerates, promotes uniform deposition, reduces plating porosity.

[0004] Publication No. CN211546708U, proposes a kind of electroplating liquid steam heating system capable of automatic temperature control, the device can automatically and accurately control the temperature of electroplating liquid, and improve the efficiency of electroplating liquid temperature regulation;But the bottom of electroplating tank is heated by heat exchange pipe, which makes the bottom temperature of electroplating liquid high, the upper temperature low, and the electroplating liquid is not heated uniformly, and then the heating effect of electroplating liquid needs to be improved. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the problem in the above background art, and further proposes an electroplating liquid heating mechanism for aluminum alloy silver plating.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] An electroplating liquid heating mechanism for aluminum alloy silver plating, comprising an electroplating tank, a condensing device, a thermocouple fixed in the electroplating tank, and a temperature control relay electrically connected to the thermocouple, further comprising a base, a coil pipe, a steam generator, a mounting bracket, and an airflow disturbance assembly,

[0008] The electroplating tank and the steam generator are both fixed on the base, and the steam generator is electrically connected to the temperature control relay;

[0009] The coil pipe is serpentine and multi-coil and is attached and wound on the outer wall of the electroplating tank, one end of the coil pipe is connected to the steam generator, and the other end of the coil pipe is connected to the condensing device;

[0010] The mounting bracket is fixed on the base, and the mounting bracket is provided with a liftable airflow disturbance assembly to uniformly raise the temperature of the electroplating liquid.

[0011] Further, the air flow disturbance assembly comprises a telescopic piece, a blowing box, a blowing pipe, an air pump and an air filter, the telescopic piece is fixed on the mounting frame, the telescopic piece is connected with the hollow blowing box, the blowing box is provided with a plurality of blowing pipes communicated with the inside of the blowing box, the blowing box is communicated with the air filter through a hose, and the air filter is communicated with the air pump.

[0012] In the scheme, the air flow disturbance assembly enhances the heat exchange efficiency inside and outside the electroplating tank through forced convection, reduces local temperature difference, and finally makes the electroplating solution evenly heated.

[0013] Further, the base and the electroplating tank are provided with a heating plate matched with the size of the electroplating tank, and the heating plate is electrically connected with the temperature control relay.

[0014] The bottom of the electroplating tank can be assisted by the heating plate, so that the heating area is more comprehensive, and the heating plate works synchronously with the steam generator and stops working, so that the temperature rising speed and efficiency of the electroplating solution are accelerated.

[0015] Further, the blowing box is fixed with a suction cover higher than the height of the blowing box, the suction cover is communicated with a negative pressure fan fixed on the mounting frame through a hose, and the negative pressure fan is communicated with a purification device through a negative pressure air pipe.

[0016] Most of the gas generated in the electroplating process can be sucked and transferred for purification by the negative pressure fan, so that the amount of gas directly discharged into the external environment can be reduced.

[0017] Further, the coil pipe is made of corrosion-resistant material.

[0018] Further, the blowing pipe is provided with a check valve and is made of corrosion-resistant material.

[0019] The check valve is arranged to allow the gas to flow into the electroplating solution in one direction to realize the function of air flow disturbance stirring, and the backflow of gas and liquid is avoided, and the blowing pipe is also made of 316L steel to resist corrosion of the electroplating solution.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] Compared with the prior art, the application can heat the electroplating solution by external serpentine winding heat tracing coil pipe combined with steam, which can avoid corrosion caused by direct contact of the coil pipe with the electroplating solution, and subsequent maintenance is convenient. In addition, on the basis of external heat tracing, the electroplating solution can be subjected to air flow disturbance, thereby optimizing the heating efficiency through dynamic heat exchange, making the electroplating solution evenly heated, reducing the disadvantages of temperature difference, and the heating effect of the electroplating solution is better. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole structure schematic view of the utility model;

[0023] Figure 2 It is a heating plate installation schematic view;

[0024] Figure 3 It is a suction cover and negative pressure fan installation schematic view;

[0025] Reference signs:

[0026] 1, electroplating bath; 2, base; 3, coil pipe; 4, steam generator; 5, mounting frame; 6, telescopic piece; 7, blowing box; 8, blowing pipe; 9, air filter; 10, air pump; 11, heating plate; 12, suction cover; 13, negative pressure fan. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. The utility model is further illustrated in combination with the drawings and embodiments:

[0028] As Figure 1 shown, an electroplating solution heating mechanism for aluminum alloy silver plating includes an electroplating bath 1, a condensing device, a thermocouple fixed in the electroplating bath 1, and a temperature control relay electrically connected to the thermocouple (wherein the condensing device, the thermocouple, and the temperature control relay have been disclosed in a publicly available document with publication number CN211546708U, a kind of electroplating solution steam heating system capable of automatic temperature control, which belongs to prior art means and is not shown), and further includes a base 2, a coil pipe 3, a steam generator 4, a mounting frame 5, and an air flow disturbance assembly,

[0029] The electroplating bath 1 and the steam generator 4 are both fixed on the base 2, and the steam generator 4 is electrically connected to the temperature control relay;

[0030] The coil pipe 3 is serpentine and multi-coil and is attached and wound on the outer wall of the electroplating bath 1, one end of the coil pipe 3 is connected to the steam generator 4, and the other end of the coil pipe 3 is connected to the condensing device (specifically, the coil pipe 3 is made of 316L type steel);

[0031] The mounting frame 5 is fixed on the base 2, and the air flow disturbance assembly on the mounting frame 5 is adjustable to uniformly raise the temperature of the electroplating solution.

[0032] Further refinement of the embodiment of the utility model, such as Figure 1As shown, the air flow disturbance assembly includes telescopic member 6, blowing box 7, blowing pipe 8, air pump 10 and air filter 9, telescopic member 6 is fixed on mounting frame 5, telescopic member 6 is connected with hollow blowing box 7, blowing box 7 is provided with a plurality of blowing pipes 8 communicated with the inside thereof at the bottom and blowing box 7 is communicated with air filter 9 through a hose, air filter 9 is communicated with air pump 10.

[0033] It should be noted that the condensing device, thermocouple, temperature control relay, steam generator 4, telescopic member 6 and air pump 10 are electrically connected with the controller, and the controller is arranged on the base 2 and is not labeled in the figure.

[0034] The working process of the utility model is as follows:

[0035] Firstly, the temperature of the electroplating solution is measured by the thermocouple, and then the temperature is fed back to the controller, if the temperature of the electroplating solution is not enough, the controller feeds back the signal to the temperature control relay, and then the steam generator 4 is started to deliver steam to the coil pipe 3, and then the electroplating solution in the electroplating tank 1 is spirally heated from the outside, when the temperature of the electroplating solution is raised to the pre-set value, the thermocouple feeds back the signal to the controller, and then the controller sends the signal to the temperature control relay, and then the temperature control relay stops the steam generator 4 from working.

[0036] In the process of heating the electroplating solution by the serpentine coil pipe 3 and steam (the coil pipe 3 made of 316L type steel and wound on the outer wall of the electroplating tank 1 does not directly contact with the electroplating solution, avoiding chemical corrosion and high-temperature fouling problems, prolonging the service life of the equipment), the controller controls the telescopic member 6 to work, and then the blowing pipe 8 can be driven to be immersed in the electroplating solution (the immersion depth is pre-set), and then the air pump 10 works to deliver air flow to the electroplating solution for stirring and disturbance (the air flow first passes through the air filter to remove impurities before being introduced into the electroplating solution to avoid polluting the electroplating solution), the air flow disturbance enhances the heat exchange efficiency inside and outside the electroplating tank 1 through forced convection, reduces the local temperature difference, and finally makes the electroplating solution evenly heated, avoiding the disadvantages of high temperature on the outside and low temperature in the center area.

[0037] Specifically, the wind speed of the disturbance air flow can be increased when the electroplating solution is heated, and the disturbance intensity can be reduced in the heat preservation stage, realizing more flexible temperature control response, and then the heating effect of the electroplating solution is better.

[0038] Compared with the prior art, the electroplating solution can be heated by the external serpentine heating coil pipe 3 combined with steam, which can avoid the corrosion caused by the direct contact of the coil pipe 3 with the electroplating solution, and the subsequent maintenance is convenient, in addition, the electroplating solution can be disturbed on the basis of external heating, and then the heating efficiency is optimized through dynamic heat exchange, so that the electroplating solution is evenly heated as a whole, the temperature difference is reduced, and the heating effect of the electroplating solution is better.

[0039] In some embodiments, as shown in Figure 2 As shown in the drawings, a heating plate 11 is arranged between the base 2 and the electroplating tank 1 and is electrically connected with the temperature control relay, and the heating plate 11 is used to assist in heating the bottom of the electroplating tank 1, so that the heating area is more comprehensive, and the heating plate 11 works synchronously with the steam generator 4, so that the temperature rising speed and efficiency of the electroplating solution are improved.

[0040] In other embodiments, as shown in Figure 3 A suction cover 12 is arranged on the blowing box 7 and is higher than the blowing box 7, the suction cover 12 is connected with a negative pressure fan 13 arranged on the mounting frame 5 through a hose, and the negative pressure fan 13 is connected with a purification device through a negative pressure pipe, so that the gas generated in the electroplating process can be sucked and transferred to the purification device, and the purification device includes an absorption tower and an activated carbon adsorption device, which are not described herein.

[0041] In some embodiments, a check valve is arranged on the blowing pipe 8, and the blowing pipe 8 is made of 316L steel, and the check valve is not shown in the drawings; the check valve is used to allow the gas to flow into the electroplating solution in one direction, so that the gas flow disturbance stirring effect is achieved, and the backflow of the gas and the liquid is avoided, and the blowing pipe 8 is also made of 316L steel to resist the corrosion of the electroplating solution.

[0042] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only used to illustrate the principle of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A heating mechanism for an electroplating solution used for silver plating of aluminum alloys, comprising an electroplating tank (1), a condensation device, a thermocouple fixedly installed in the electroplating tank (1), and a temperature control relay electrically connected to the thermocouple, characterized in that, It also includes a base (2), coils (3), a steam generator (4), a mounting bracket (5), and an airflow disturbance assembly. The electroplating tank (1) and the steam generator (4) are both fixed on the base (2), and the steam generator (4) is electrically connected to the temperature control relay; The coil (3) is serpentine and wrapped around the outer wall of the electroplating tank (1) in multiple loops. One end of the coil (3) is connected to the steam generator (4), and the other end of the coil (3) is connected to the condensing equipment. The mounting bracket (5) is fixed on the base (2), and the mounting bracket (5) is equipped with a liftable airflow disturbance component to make the temperature of the electroplating solution rise evenly.

2. The electroplating solution heating mechanism for silver plating of aluminum alloy according to claim 1, characterized in that, The airflow disturbance component includes a telescopic component (6), an air blowing box (7), an air blowing pipe (8), an air pump (10), and an air filter (9). The telescopic component (6) is fixed on the mounting bracket (5). The telescopic component (6) is connected to the hollow air blowing box (7). The bottom of the air blowing box (7) is provided with several air blowing pipes (8) that connect to its interior. The air blowing box (7) is connected to the air filter (9) through a flexible hose. The air filter (9) is connected to the air pump (10).

3. The electroplating solution heating mechanism for silver plating of aluminum alloy according to claim 1, characterized in that, A heating plate (11) adapted to the size of the electroplating tank (1) is provided between the base (2) and the electroplating tank (1), and the heating plate (11) is electrically connected to the temperature control relay.

4. The electroplating solution heating mechanism for silver plating of aluminum alloy according to claim 2, characterized in that, The air blowing box (7) is fixed with a suction hood (12) higher than its height. The suction hood (12) is connected to a negative pressure fan (13) fixed on the mounting frame (5) through a hose. The negative pressure fan (13) is connected to the purification equipment through a negative pressure air duct.

5. The electroplating solution heating mechanism for silver plating of aluminum alloy according to claim 1, characterized in that, The coil (3) is made of corrosion-resistant material.

6. The electroplating solution heating mechanism for silver plating of aluminum alloy according to claim 2, characterized in that, The air blowing pipe (8) is equipped with a check valve and is made of corrosion-resistant material.

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