KR101017575B1 - Apparatus for preventing spark of anode rail for anodizing treatment of metal - Google Patents

Abstract

PURPOSE: An apparatus for preventing the spark of an anode rail for anodizing metal is provided to prevent spark between an anode line and a holder since a holder, which makes surface contact with an anode rail, is detected, and thus power, which is applied each anode line, is controlled. CONSTITUTION: An apparatus for preventing the spark of an anode rail for anodizing metal comprises an anode rail(20), a chain(28), a holder(1) and a carbon roller. The anode rail is installed on a electrolytic cell(10) as a closed path. Insulating blocks(21,24) are coupled on the anode rail to make given sections. An anode line is coupled between the insulating blocks. The insulating block is formed to be wider than the width of the holder, which makes surface contact. Different sizes of voltage and current are applied to the anode line. The chain is rotated along the anode rail by a sprocket(50), and transfer blocks are fixed to the chain at given intervals. The holder rotates while making surface contact with the anode rail.

Description

Apparatus for Preventing Spark of Anode Rail for Anodizing Treatment of Metal}

The present invention relates to a device for preventing sparks generated in the anode rail of the metal anodizing device, and more particularly, a cradle moved along the anode rail for contacting the anode line through the insulating block for anodizing the metal. To prevent sparks from occurring when the

In general, when anodizing is carried on a metal or a part to an anode and electrolyzed in a dilute-acid electrolyte, an oxide film (aluminum oxide: Al2O3) having a great adhesion with a base metal by oxygen generated at the anode is produced. Is formed. Anodization is a compound word of anode and oxidation (anodizing). In addition, there is a difference from plating a metal part on a cathode in electroplating. The most representative material of anodization is aluminum (Al), and in addition, it is anodized to metal materials such as magnesium (Mg), zinc (Zn), titanium (Ti), tantalum (Ta), hafnium (Hf), and niobium (Nb). Processing. Recently, the anodizing treatment of magnesium and titanium materials is also increasingly used.

In anodizing on aluminum alloys, anodizing on aluminum alloys causes aluminum to erode in half and aluminum oxide on the surface. Aluminum anodizing (anodic oxidation) can form a film having different properties depending on the composition and concentration of various electrolyte (treatment), additives, temperature, voltage, current, and the like of the electrolyte.

As the characteristics of the anodized film, the film is a dense oxide excellent corrosion resistance, improve the decorative appearance, the anodized film is quite hard, excellent wear resistance, improve the coating adhesion, improve the bonding (bonding) performance, It improves lubricity, displays unique colors for decorative purposes, enables pretreatment of plating, and detects surface damage.

In particular, the characteristic of hard anodizing is low temperature (or room temperature) electrolysis using aluminum alloy, which is a low temperature electrolytic method to H2SO4 solution. If it is abnormal, it can be called hard. Aluminum metal surface is transformed into alumina ceramic using electric and chemical methods. When this method is applied, aluminum metal itself is oxidized and converted into alumina ceramic, and the surface of aluminum is stronger than steel and wear resistance is better than hard chromium plating. It does not peel off like plating or coating, and the changed alumina ceramic surface has excellent electrical insulation (1,500V), but electricity flows well inside. Advanced technologies using a hard-anodizing surface treatment method have been developed and applied to such aluminum metals.

Thus, in order to process hard anodizing on aluminum metal, an aluminum film is immersed in an electrolytic cell containing an acid solution of electrolyte and flows a certain voltage and current so that an oxide film is formed on the metal surface, depending on the voltage and current applied to the electrolytic cell. The thickness of the oxide film varies.

Accordingly, in order to increase the thickness of the aluminum metal, an aluminum metal is immersed in an electrolytic cell to which a low voltage and current are applied to form a film having a predetermined thickness, and then the aluminum metal is transferred to an electrolytic cell to which a relatively high voltage and current is applied. . That is, it was necessary to prepare a plurality of electrolytic cells having different voltages and currents, and to increase the film thickness while immersing aluminum metal in the corresponding electrolytic cells sequentially.

Therefore, in order to increase the film thickness of aluminum metal, many electrolyzers and additional equipment were required. In addition, it takes a long time to increase the thickness of the metal film, as well as an increase in manpower and cost for anodizing aluminum metal.

In the general electrolytic cell in which voltage and current are rectified and applied through a rectifier rectifying alternating current (AC) to direct current (DC), the film thickness of aluminum metal is about 50 μm. The film thickness is determined depending on the material of aluminum, which is mostly plated, or on the type of alloy of aluminum. In particular, the lower the composition ratio of aluminum, the thinner the film or thinner. In addition, there was a problem that the corrosion resistance and hardness were weak due to the limited thickness of the film.

Furthermore, the color of the surface coating of the plating object varies depending on the thickness of the coating, but there is a problem in that it is difficult to implement various colors when the thickness of the coating is limited.

In order to solve such a problem, there is a patent application No. 10-0892885 (anodizing method and system thereof) of the present application filed by the present applicant as a prior art according to the present invention.

The prior art, in the accompanying Figure 1, the feed block 29 fixed to the chain 28 is rotated while pushing the holder 30 while rotating. The plurality of plating objects 33 are mounted on the holder 30 from the hanger 32. The cradle 30 has a cathode rail 20 coupled with the insulating blocks 21 partitioned at predetermined intervals on the anode lines 20a-20c which are in surface contact with each other. In addition, different voltages and currents are applied to the anode lines 20a-20c. However, the cradle 30 is supplied with a predetermined voltage and current power from the anode line 20a before the insulating block 21 of the anode rail 20, and then an insulating block 21 after anodizing the plating object 33. Pass through). When the cradle 30 passes through the insulating block 21 and then enters the next anode line 20b and is in surface contact, a momentary spark is generated by the power applied to the anode line 20b. The momentary sparking causes damage to the groove S or the like in the front portion or the holder 30 of the anode line 20b in contact with the holder 30.

The damage caused by the spark causes the groove to become deeper or wider, which acts as a load that prevents the cradle from naturally rotating along the anode rail, making it difficult to operate the anodizing system smoothly or not supplying power to the anode line. This causes a problem that the entire anode rail needs to be replaced. This was pointed out as a disadvantage of lowering the work efficiency, leading to an increase in the replacement cost and lowering the productivity.

The present invention is to solve the above problems, it is to prevent the occurrence of sparks by applying a carbon roller to the cradle which is in contact with the anode rail and the insulating block is integrally coupled to the anode line provided in the metal anodizing processing device Purpose.

In addition, another object of the present invention is to prevent the occurrence of spark between the anode line and the cradle by detecting a cradle in contact with the anode rail and controlling the power applied to each anode line.

In order to achieve the above object, the present invention provides a metal anodizing apparatus for immersing a plating object in an electrolytic cell in which a predetermined amount of electrolyte is stored, and applying an electric power to the electrolyte to anodize the plating object. An anode rail is installed and coupled to the insulating block for partitioning a predetermined section, and the anode line to which voltage and current of different sizes are applied between the insulating blocks; A chain rotated by the sprockets along the anode rail and the transfer block is fixed at regular intervals; And a holder on which the hanger is rotated in surface contact with the anode rail and fixed to support the plating object. The insulating block is formed to have a width wider than that of the holder in surface contact, and the surface is in contact with the anode rail in the holder. It is characterized by providing a spark prevention device for the anode rail for anodizing treatment of metal provided with a carbon roller.

In addition, the present invention is further provided with a detection sensor for detecting the position of the cradle, the control unit for turning on or off the power applied to the anode line between the insulating block as a detection signal of the sensor.

In addition, the present invention is characterized in that the sensor includes an infrared sensor or a limit switch.

According to the present invention, by forming a carbon roller in a cradle in contact with the anode line of the anode rail to suppress the occurrence of sparks, the replacement cycle of the anode rail is maximized and the work of the anodizing apparatus of the metal is maximized. Productivity is improved by maximizing efficiency.

1 is a view showing a holder in surface contact with the anode rail of the conventional anodizing device of metal.
2 is a partial perspective view showing an anodizing apparatus for a metal according to the present invention.
3 is a view showing a cradle which is in surface contact with the anode rail of the anodizing apparatus for metal according to the present invention.
4A to 4C are views illustrating a cradle of the anode rail in the spark preventing device of the anode rail for metal anodization according to the present invention.
5A to 5C are views illustrating a process of detecting a position of a cradle in a spark preventing device of an anode rail for metal anodizing treatment according to the present invention.
6 is a detection sensor of the present invention, Figure 6a shows the mounting position of the non-contact infrared sensor, Figure 6b shows the mounting position of the contact limit switch.

Hereinafter, an apparatus for preventing sparks of the anode rail for anodizing a metal according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention is to prevent the spark that may occur between the cradle in contact with the anode rail and the surface of the anode line and the insulating block integrally combined in the metal anodizing treatment apparatus.

2 is a perspective view illustrating an anodizing treatment of a metal, showing a main part thereof. The present invention is a device for suppressing and preventing the generation of sparks due to the surface contact between the anode rail and the cradle in the anodizing device of the metal. Therefore, in the present invention, a general description of the structure and structure of the metal anodizing apparatus will be briefly described.

That is, an electrolytic cell 10 having a predetermined amount of electrolyte solution is provided, and a cathode rail 23 connected to a plurality of negative electrode plates (not shown) and a positive electrode rail connected to a plurality of positive electrode plates (not shown) on the electrolytic cell 10 ( 20) is provided. The cathode and anode plates are supplied with different voltages and currents. The negative electrode rail 23 connected to the negative electrode plate is an insulating block 24 for partitioning a predetermined section, and a plurality of negative electrode lines 23a are coupled, and the positive electrode rail 20 connected to the positive electrode plate is an insulating block for partitioning a predetermined section ( 21, a plurality of anode lines 20a-20c are combined.

The cathode rail 23 has a support line 26 connected to the plurality of fixing blocks 27 on the top of the electrolytic cell 10 is connected to the anode plate. A chain 28 rotated by the sprocket 50 is provided inside the anode rail 20. The transport block 29 is fixed to the chain 28 at regular intervals, so that the transport block 29 also rotates in accordance with the rotation of the chain 28. And the transfer block 29 is configured to be in contact with the cradle 30 in contact with the anode rail (20). That is, the transfer block 29 is rotated by the rotation of the chain 28, the transfer block 29 rotates the cradle 30 in contact with the anode rail (20). In the holder 30, a plurality of plating objects 33 are fixed to the hanger 32. The plating object 33 is immersed in the electrolyte stored in the electrolytic cell 10.

In FIG. 3, in the anodizing apparatus of a metal having such a configuration, a carbon roller 2 coupled with a hinge 5 is provided on a holder 1 which is in surface contact with the anode rail 20. The cradle 1 should be larger than the width of the insulating block 21 for partitioning and insulation at regular intervals on the anode rail 20. And the carbon roller 2 is attached to the front part with respect to the advancing direction of the holder 1. The carbon roller 2 easily conducts the DC power applied to the carbon material. Moreover, the carbon roller 2 absorbs and conducts DC power applied rapidly. That is, the carbon roller 2 suppresses the spark generation when the DC power is applied to the anode rail 20. In addition, the carbon roller 2 is axially supported on the rotating shaft is rotated while the surface contact at the upper end of the anode rail (20). The carbon roller 2 may be in surface contact with the side or bottom surface of the positive electrode rail 20.

In FIG. 4A, the carbon roller 2 mounted on the holder 1 is in surface contact with the first anode line 200. At this time, the power applied to the first anode line 20a is conducted to the plating object 33 through the hanger 32 via the holder 1.

In FIG. 4B, the carbon roller 2 mounted on the holder 1 is in surface contact with the insulating block 21. At this time, the holder 1 is insulated by the insulating block 21 so that power is not conducted to the plating object 33 through the hanger 32.

In FIG. 4C, the carbon roller 2 mounted on the holder 1 is in surface contact with the second anode line 20b. At this time, the power applied to the second anode line 20b is conducted to the plating object 33 through the hanger 21 through the holder 1.

Assuming that 20V is applied to the first positive electrode line 20a and 40V is applied to the second positive electrode line 20b, the carbon roller 2 of the holder 1 is instantaneously contacted with the second positive electrode line 20b. Even though the carbon roller 2 has a small surface contact with the second anode line 20b and absorbs power supplied to the second anode line 20b according to the material properties of the carbon roller 2, the cradle ( Pass through 1) to the hanger (32).

On the other hand, even if continuous contact between the carbon roller 2 and the positive electrode rail 20 occurs, the loss of the carbon roller 2 is faster than the positive electrode 20, so that the replacement or maintenance of the carbon roller 2 becomes easy. will be.

5A to 5C are provided with a detection sensor 3 for detecting the position of the cradle 1 in surface contact with the anode rail 20. The sensor 3 may include a laser sensor, an infrared sensor, or a proximity sensor in a non-contact manner with the cradle 1, and a limit switch may be installed in contact with the cradle 1. The detection sensor 3 may be installed on the upper side or the side where the insulating block 21 is located.

In FIG. 5A, the sensing sensor 3 detects the cradle 1 in which the carbon roller 2 is in surface contact with the first anode line 20a of the anode rail 20. At this time, when the sensor 3 detects the holder 1, the detected signal is transmitted to the controller 4, and the controller 4 cuts off the power supplied to the first positive electrode line 20a. The power is cut off to the second positive electrode line 20b under the control of the controller 4.

In FIG. 5B, the sensor 3 detects the holder 1 on which the carbon roller 2 is in surface contact with the insulating block 21. At this time, since the sensor 3 continuously detects the holder 1, the controller 4 does not apply power to the first anode line 20a and the second cathode line 20b.

In FIG. 5C, the sensor 3 detects the holder 1 on which the carbon rollers 2 are in surface contact with the second anode line 20b. That is, since the detection sensor 3 detects the cradle 1 outside the insulating block 21, the controller 4 determines that the carbon roller 2 of the cradle 1 is in contact with the second positive electrode line 20b. Power is applied to the second positive electrode line 20b. Therefore, the controller 4 causes the power to be applied to the second positive electrode line 20b after the second positive electrode line 20b and the carbon roller 2 of the holder 1 are in surface contact with each other. Due to the characteristics, the power supplied to the second anode line 20b is absorbed to be conducted to the hanger 32 via the holder 1.
6a shows that the non-contact infrared sensor 3a is mounted on both sides of the holder 1 as the detection sensor 3 to detect the position of the holder 1. 6b shows that the contact limit switch 3b as the sensor 3 is in contact with the holder 1 to detect the position of the holder 1 by contact.

As described above, even when the holder in contact with the anode rail in contact with the anode rail in the metal anodizing treatment apparatus of the present invention is in contact with the corresponding anode line to which power is supplied, the occurrence of sparks can be suppressed and prevented, thereby minimizing the loss of the anode rail or the holder. There is an advantage that can improve the reliability of the metal anodizing device, and improve the efficiency and productivity of the work.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who has it will know it easily.

1, 30: holder 2: carbon roller
3: sensor 4: control part
10: electrolyzer 20: anode rail
20a, 20b: anode line 21, 24: insulating block
23a: cathode line 26: support line
27: fixed block 28: chain
29: transfer block 32: hanger
33: plating object 50: sprocket

Claims (3)

In the metal anodizing apparatus for immersing the plating object in the electrolytic cell in which a predetermined amount of electrolyte solution is stored, applying power to the electrolyte solution to anodize the plating object,
An anode rail installed as a closed on the electrolytic cell and coupled with an insulating block for partitioning a predetermined section, and an anode line to which voltage and current of different sizes are applied between the insulating blocks;
A chain rotated by the sprockets along the anode rail and the transfer block is fixed at regular intervals;
And a holder on which the hanger for rotating and surface-contacting the anode rail is fixed to support the plating object.
The insulating block is formed wider than the width of the cradle in contact with the surface,
Spark protection device for the anode rail for metal anodizing treatment is provided with a carbon roller which is rotated in contact with the anode rail in the holder.
The apparatus of claim 1, further comprising a sensing sensor configured to detect the position of the cradle in a non-contact or contact manner, and further comprising a controller configured to turn on or off power applied to the anode line between the insulating blocks as a sensing signal of the sensing sensor. Protection device for anode rail for anodizing metals.
The spark prevention device of claim 2, wherein the detection sensor comprises an infrared sensor for non-contact sensing of the cradle or a limit switch for sensing the cradle in contact.

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