KR101282640B1 - Apparatus for electro painting - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrodeposition coating apparatus and a control method thereof, and more particularly, to an electrodeposition coating apparatus and a method for controlling the electrodeposition coating apparatus capable of forming a coating film having various thicknesses and preventing foreign substances or air layers from remaining in the coating film.
The present invention includes an electrodeposition tank in which paint is freshly supplied and a cathode current is supplied, a rail installed to maintain an interval with the electrodeposition tank, and a plurality of cradles installed to be movable along the rail and mounted so that a work object passes through the electrodeposition tank. , A driving unit for moving the cradle, a current supply unit for supplying a cathode current so that the supply time is different for each cradle, a vibrating unit for flowing the work object passing through the electrodeposition tank, and washing to remove foreign substances from the work object supplied to the electrodeposition tank. It provides an electrodeposition coating device comprising a part.

Description

Electrodeposition Coating Device {APPARATUS FOR ELECTRO PAINTING}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrodeposition coating apparatus and a control method thereof, and more particularly, to an electrodeposition coating apparatus and a method for controlling the electrodeposition coating apparatus capable of forming a coating film having various thicknesses and preventing foreign substances or air layers from remaining in the coating film.

In general, electrodeposition coating is an electrophoretic coating, which means a method of painting a vehicle body or a part using an aqueous paint or a water-soluble resin as an electrolytic bath.

Since the suspension members installed on the bottom of the vehicle are exposed through the bottom of the vehicle, rainwater or foreign matter on the ground may contact and corrode, so that a coating film is formed on the outer wall of the suspension member by applying a functional paint to prevent corrosion.

Spring, shock absorbers and stabilizers are installed to prevent the body from shaking. These members are installed on the lower arm, and one end of the lower arm is fastened by a bush to the knuckle (or carrier) of the wheel. The other end of the lower arm is fastened to the crossmember (or subframe) by a bush.

Here, a member such as a lower arm and a cross member is called a suspension member, and a trailing arm and a torsion beam are installed in the small car in place of the lower arm and the cross member.

Suspension members as described above, and members that are exposed to the outside or in contact with the fluid, such as oil pans, oil tanks are subjected to electrodeposition coating to form a coating film passing through the electrodeposition coating device after the production of the product is completed.

Background art of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2010-0101881 (published on September 20, 2010, the name of the invention: electrodeposition coating system).

Since the general electrodeposition coating apparatus forms a coating film having the same thickness, it is difficult to form a coating film thickness required by the workpiece, and there is a problem in that the electrodeposition coating apparatus needs to be reset whenever the object to be subjected to electrodeposition coating is changed.

In addition, the general electrodeposition coating apparatus has a problem that the surface of the product is completed, the electrodeposition coating process can be formed because the air layer can be formed inside the coating film when the coating film is formed on the outer wall of the workpiece.

In addition, the general electrodeposition coating apparatus has a problem in that foreign matter remains on the surface of the product where the electrodeposition coating process is completed because it is difficult to remove the foreign matter remaining on the surface of the workpiece when forming a coating film on the outer wall of the workpiece.

Therefore, there is a need for improvement.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrodeposition coating apparatus and a control method thereof, which can form a coating film having various thicknesses and can prevent foreign substances or air layers from remaining in the coating film.

In order to achieve the above object, the present invention, the electrodeposition of the paint is fresh water and the anode current is supplied; A rail installed to maintain a spacing with the electrodeposition tank; A plurality of cradles installed to be movable along the rails and mounted to allow the work object to pass through the electrodeposition tank; A driving unit for moving the holder; A current supply unit supplying a cathode current such that the supply time is different for each cradle; Vibration unit for flowing the work object passing through the electrodeposition tank; And it provides an electrodeposition coating device comprising a washing unit for removing foreign matter from the object to be supplied to the electrodeposition tank.

The washing unit may include: a first washing unit spraying washing water to a work object and passing the work object to the washing water; A spraying unit spraying washing water to the work object passing through the first washing unit; And a second washing unit spraying the washing water to the work object passing through the spraying unit and passing the work object to the washing water.

The first washing unit may include: a first washing tank provided in a moving area of the rail and containing a work object which is washed by fresh water and moved by the holder; And a first nozzle part for spraying the washing water onto the work object supplied to the first washing tank.

The spraying unit may include a plurality of spraying nozzles for spraying the washing water onto the workpiece to be moved along the rails through the first washing unit.

The second washing unit may include: a second washing tank provided in the moving area of the rail and containing the work object which is washed by fresh water and moved by the holder; And a second nozzle part for spraying the washing water onto the work object supplied to the second washing tank.

In addition, the cleaning unit includes a sensor for sensing a work object supplied to the first washing unit; And a controller configured to determine whether the first washing unit, the spraying unit, and the second washing unit are operated according to a detection signal transmitted from the sensor.

In addition, the present invention comprises the steps of: (a) detecting the work object supplied to the first washing unit to pass through the first washing unit, the injection unit and the second washing unit; And (b) spraying the washing water to the work object by driving the first washing unit, the spraying unit, and the second washing unit step by step when the work object is detected. to provide.

In addition, if the work object is not detected in the step (a), the step of stopping the washing water by stopping the first washing unit, the spraying unit and the second washing unit step by step.

The electrodeposition coating apparatus according to the present invention can easily control the time to supply the current to each work object according to the type of work object passing through the electrodeposition tank to easily form a coating film of different thickness required in various products There is an advantage to this.

In addition, the electrodeposition coating apparatus according to the present invention can prevent the formation of an air layer inside the coating film when the coating film is formed on the outer wall of the workpiece because the workpiece passing through the electrodeposition flows in a plurality of directions, the electrodeposition coating process is completed There is an advantage that the surface of the product is beautiful.

In addition, the electrodeposition coating apparatus and the control method according to the present invention is to remove the foreign matter remaining on the surface of the workpiece before the coating film is formed on the outer wall of the workpiece to prevent the foreign matter remaining inside the coating film electrodeposition coating process There is an advantage that the surface of this finished product is effectively beautiful.

In addition, the electrodeposition coating apparatus and the control method according to the present invention, there is an advantage to reduce the amount of washing water used in the washing process because the washing water is not sprayed when the washing process proceeds without the workpiece.

1 is a block diagram showing an electrodeposition coating apparatus according to an embodiment of the present invention.
2 is a driving diagram showing a washing unit of the electrodeposition coating device according to an embodiment of the present invention.
3 is a block diagram showing a washing unit of the electrodeposition coating apparatus according to an embodiment of the present invention.
Figure 4 is a block diagram showing the electrodeposition of the electrodeposition coating apparatus according to an embodiment of the present invention.
5 is a perspective view of the cradle and the vibration unit of the electrodeposition coating apparatus according to an embodiment of the present invention.
6 is a perspective view showing a cradle and a first booth connection state of the electrodeposition coating apparatus according to an embodiment of the present invention.
7 is a perspective view showing a cradle and a second boot bar connection state of the electrodeposition coating apparatus according to an embodiment of the present invention.
8 is an exploded perspective view showing a cradle of the electrodeposition coating apparatus according to an embodiment of the present invention.
9 is a perspective view illustrating a hanger and a vibration unit of the electrodeposition coating apparatus according to the embodiment of the present invention.
10 is a flowchart illustrating a control method of the electrodeposition coating apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the electrodeposition coating apparatus according to the present invention.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram showing an electrodeposition coating apparatus according to an embodiment of the present invention, Figure 2 is a drive diagram showing a washing part of the electrodeposition coating apparatus according to an embodiment of the present invention, Figure 3 1 is a block diagram illustrating a cleaning part of the electrodeposition coating device according to an embodiment.

In addition, Figure 4 is a block diagram showing the electrodeposition of the electrodeposition coating apparatus according to an embodiment of the present invention, Figure 5 is a perspective view of the cradle and the vibration unit of the electrodeposition coating apparatus according to an embodiment of the present invention, Figure 6 is a perspective view showing the cradle and the first booth bar connection state of the electrodeposition coating apparatus according to an embodiment of the present invention.

In addition, Figure 7 is a perspective view of the cradle and the second boot bar connection state of the electrodeposition coating apparatus according to an embodiment of the present invention, Figure 8 is a cradle of the electrodeposition coating apparatus according to an embodiment of the present invention is shown 9 is an exploded perspective view, and FIG. 9 is a perspective view illustrating a hanger and a vibrator of an electrodeposition coating apparatus according to an exemplary embodiment of the present invention.

1 to 9, the electrodeposition coating apparatus according to an embodiment of the present invention is the electrode is installed in the electrodeposition tank 10, the electrode is supplied with fresh water and the anode current is supplied to maintain the interval between the electrodeposition tank 10 30, a plurality of cradles 50 installed to be movable along the rails 30 and mounted to allow the work object to pass through the electrodeposition tank 10, and a driving unit 70 for moving the cradle 50. Supplying the current supply unit 80 for supplying the cathode current so that the supply time is different for each cradle 50, the vibrating unit 90 for flowing the work object passing through the electrodeposition tank 10, and the electrodeposition tank 10 It includes a washing unit 100 for removing foreign matter from the object to be worked.

The cradle 50 of the present embodiment includes a first cradle 50a having a relatively short current supply time, and a second cradle 50b having a longer current supply time than the first cradle 50a.

Therefore, the work object that is caught by the first cradle 50a and passes through the electrodeposition tank 10 has a shorter time for the electrodeposition coating to proceed compared to the work object that is caught by the second cradle 50b and passes through the electrodeposition tank 10. Because of this, the thickness of the coating film formed on the outer wall of the workpiece is thinly formed.

On the other hand, the work object which is caught by the second cradle 50b and passes through the electrodeposition tank 10 is compared with the work object that is caught by the first cradle 50a and passes through the electrodeposition tank 10. Since it is made long, the thickness of the coating film formed on the outer wall of the workpiece is formed thick.

As described above, the supply time of the current supplied to the holder 50 by the current supply unit 80 is different for each holder 50.

Therefore, the operator can adjust the thickness of the coating film by classifying and placing the workpiece by the holder 50 without resetting the electrodeposition coating device to adjust the thickness of the coating film required for each work object.

Since the work object passing through the electrodeposition tank 10 by the cradle 50 flows by the operation of the vibrator 90, vibration is generated when the paint film is formed on the outer wall of the work object, thereby preventing the air layer from being formed inside the paint film. Done.

Since the work object supplied to the electrodeposition tank 10 comes into contact with the washing water while passing through the washing unit 100, the coating film formed on the outer wall of the work object is introduced into the electrodeposition tank 10 with foreign substances remaining on the work object removed. It can be formed more effectively and beautifully.

The cradle 50 has a support portion 52 slidably connected to the rail 30 by a roller 54 and a hanger portion 56 to which a hanger 57 connected to the support portion 52 and to which a work object is mounted is connected. ), And an insulating portion 58 provided between the mounting portion 56 and the support portion 52.

The current is supplied to the work object caught by the mounting unit 56 through the current supply unit 80, and the current flowing along the mounting unit 56 by the insulating unit 58 is supplied to the support unit 52 and the rail 30. Do not

The current flowing along the mounting portion 56 is supplied to the workpiece through the hanger 57 to supply a cathode current to the workpiece, and the anode current supplied to the electrodeposition tank 10 and the electrolysis action proceed to the workpiece. Electrodeposition coating in which paint is deposited is in progress.

The support portion 52 includes a pillar plate 52a to which the roller 54 is rotatably connected, and a support plate 52b connected to the pillar plate 52a and to which the mounting portion 56 is connected.

The pillar plate 52a is formed of a pair of plates connected to the roller 54 rotatably installed on the rail 30 and extending downward, and at the ends of the pair of pillar plates 52a in a horizontal direction. The support plate 52b to be disposed is coupled.

A hole is formed in the center of the support plate 52b, and the mounting unit 56 is coupled, and an insulating unit 58 is interposed between the mounting unit 56 and the support plate 52b to supply the mounting unit 56. The current is prevented from being transferred to the rail 30 along the support plate 52b and the column plate 52a.

The insulating portion 58 penetrates through the insulating piece 58a interposed between the support plate 52b and the mounting portion 56, the support plate 52b, the mounting portion 56, and the insulating piece 58a, and is fastened to the fastening member. It includes an insulating pin (59a) is inserted.

The insulating piece 58a is a plate-shaped insulating member interposed between the support plate 52b and the mounting portion 56, and a plurality of fastening hole portions 58b are formed, and the outer wall of the support plate 52b and the support plate ( Three insulating pieces 58a are disposed in the space between 52b) and the mounting portion 56 and the outer wall of the mounting portion 56, respectively.

Since the insulating pin 59a inserted into the fastening hole 58b passes through the mounting portion 56 and the support plate 52b, the mounting portion 56 is connected to the support plate 52b and the mounting portion 56. The current supplied through the conductive plate 52b is not conducted to the side.

Since the insulating pin 59a has a long through hole 59b formed in the axial direction and a fastening member is inserted to penetrate the through hole 59b, the mounting pin 56 and the fastening member do not come into contact with each other. One end of the jaw portion (59c) is formed so that the head of the fastening member is not in contact with the mounting portion (56).

The drive unit 70 includes a chain 72 in which the column plate 52a is inserted and moved while maintaining a distance from the rail 30, so that the column plate 52a is wound when the chain 72 is wound by a motor (not shown). To move in the moving direction of the chain (72).

Here, the motor and the winding roller (not shown) for moving the chain 72 can be easily carried out by those skilled in the art who recognized the technical configuration of the present invention will not be described in detail or description.

The current supply unit 80 is disposed to maintain a gap with the mounting unit 56 and the first bus bar 82 to which the power line is connected, and is arranged to maintain a gap with the first bus bar 82 and the power line is connected. The second bus bar 84, the first terminal part 86 installed on the mounting part 56 and in contact with the first bus bar 82, and the second boot bar 84 installed on the mounting part 56. The second terminal portion 88 in contact with the ().

The current is supplied to the work object caught on the first cradle 50a through the first boot bar 82, and the current is supplied to the work object caught on the second cradle 50b through the second boot bar 84.

The first bus bar 82 is disposed above the mounting portion 56 and is formed in a long panel shape along the rail 30 and is widely disposed in the horizontal direction.

In addition, the first terminal portion 86 in contact with the first boot bar 82 is bent in a '∠' shape, the first elastic portion 86a, the bottom of which is coupled to the upper surface of the mounting portion 56, and the first elastic It is installed on the upper end of the portion (86a) and includes a first contact portion (86b) moved in contact with the first boot bar (82).

Since the first elastic portion 86a is installed on the upper surface of the mounting portion 56, the first contact portion 86b is disposed above the mounting portion 56 to contact the first bus bar 82, and the first elastic portion Since the first contact portion 86b is pressed toward the first busbar 82 by the 86a), the first contact portion 86b and the first busbar (when the first holder 50a moves along the rail 30). 82) to remain in contact.

The second bus bar 84 is disposed at the side of the mounting portion 56 and is formed in a long panel shape along the rail 30 and is widely disposed in the vertical direction.

In addition, the second terminal portion 88 which is in contact with the second bus bar 84 is bent in a '∠' shape, the second elastic portion 88a, the bottom of which is coupled to the side of the mounting portion 56, and the second elastic It is installed on the upper end of the portion (88a) and includes a second contact portion (88b) moved in contact with the second boot bar (84).

Since the second elastic portion 88a is installed on the side of the mounting portion 56, the second contact portion 88b is disposed at one side of the mounting portion 56 to be in contact with the second bus bar 84, and the second elastic portion 88 Since the second contact portion 88b is pressed toward the second busbar 84 by the 88a), the second contact portion 88b and the second busbar (when the second mounting base 50b moves along the rail 30). 84) to be kept in contact.

Here, since the first bus bar 82 is formed to be shorter than the second bus bar 84, the current supply time is relatively short in the first cradle 50a through which the current is supplied through the first bus bar 82. In this case, the current supply time is relatively long in the second cradle 50b through which the current is supplied through the second boot bar 84.

Therefore, the work object that is caught by the first cradle 50a and passes through the electrodeposition tank 10 has a short time for electrodeposition coating to proceed, so that the thickness of the coating film formed on the outer wall of the work object is thin, and the electrodeposition tank is caught by the second cradle 50b. The work object passing through (10) has a relatively long time that the electrodeposition coating proceeds, so that the thickness of the coating film formed on the outer wall of the work object is thickened.

The vibrating unit 90 includes a vibrating bar 92 extending from the rinsing 57 and provided with a vibrating roller 94, and an uneven part 96 provided in the movement path of the vibrating roller 94.

When the work object is mounted on the rinser 57 caught by the holder 50, and the holder 50 is introduced into the electrodeposition tank 10 by the operation of the driving unit 70, it extends downward from the rinsing 57. The vibrating bar 92 is slid along the uneven portion 96 formed on the bottom surface of the electrodeposition tank 10.

Since the vibrating roller 94 is installed at the lower end of the vibrating bar 92, the vibrating roller 94 is slid along the uneven portion 96 to generate vibration in the vertical direction.

Therefore, the rinser 57 passing through the electrodeposition tank 10 passes through the electrodeposition tank 10 while vibrating up and down by the flow of the vibration bar 92, so that when the coating film is formed on the outer wall of the workpiece, It is possible to prevent the formation of an air layer.

The rinsing 57 is provided with a locking ring 57b rotatably mounted to the holder 50, and the locking ring 57b is rotatably connected to the rinsing 57.

Since the locking ring 57b is formed in a curved ring shape, when the rinsing 57 is flown by the vibrating bar 92, a slip is generated between the locking ring 57b and the holder 50 while the rinsing 57 flows. do.

In addition, since the locking ring 57b is rotatably connected to the rinse 57 by the fastening member, an additional hinge is provided.

Therefore, the rinsing 57 may be flown in a plurality of directions in the front-rear direction and the left-right direction by the vibration transmitted by the vibration bar 92.

The washing unit 100 may include a first washing unit 110 for spraying washing water to a work object and passing the washing object to the washing water, and an injection unit for spraying washing water to the work object passing through the first washing unit 110 ( 120 and a second washing unit 130 for spraying the washing water to the workpiece passing through the spray unit 120 and passing the workpiece to the washing water.

The work object is mounted on the hanger 57 installed on the cradle 50 moving along the rail 30, and the rail 30 is moved to the first washing unit 110, the spray unit 120, and the second washing unit. Since the part 130 continuously passes, the workpiece is removed from foreign substances while being in contact with the wash water three times.

The first washing unit 110 includes a first washing tank 112 and a first washing tank 112 provided in a moving area of the rail 30 to contain a work object which is washed by fresh water and moved by the holder 50. It includes a first nozzle portion 114 for spraying the washing water to the work object supplied to.

When the workpiece is injected into the first washing tank 112 by the movement of the rail 30, the washing water sprayed from the first nozzle part 114 is sprayed on the workpiece, and the workpiece passes through the first washing tank 112. When the wash water contained in the first washing tank 112 and the work object is in contact with each other to remove the foreign matter remaining on the outer wall of the work object.

At this time, the washing water sprayed on the work object and contained in the first washing tank 112 includes various detergent components, and is supplied in a heated state at a set temperature or more, so that foreign matters can be easily removed.

Here, since the conditions for the component and the temperature of the washing water can be easily carried out by those skilled in the art with the technical constitution of the present invention, a detailed description thereof will be omitted.

The injection unit 120 includes a plurality of injection nozzle units 122 that spray washing water to the work object that is moved along the rail 30 through the first washing unit 110.

In the plurality of injection nozzle parts 122, a pair of injection nozzle parts 122 are disposed to face each other, and the washing water is sprayed on both sides of the workpiece passing through the pair of injection nozzle parts 122.

The second washing unit 130 includes a second washing tank 132 and a second washing tank 132, which are provided in a moving area of the rail 30 and contain work objects that are washed by fresh water and moved by the holder 50. The second nozzle unit 134 for spraying the washing water to the object to be supplied to the work.

When the workpiece is injected into the second washing tank 132 by the movement of the rail 30, the washing water sprayed from the second nozzle unit 134 is sprayed on the workpiece, and the workpiece passes through the second washing tank 132. The foreign matter remaining on the outer wall of the work object is removed while the wash water contained in the second wash tank 132 contacts the work object.

In addition, the washing unit 100 of the present embodiment includes a sensor 140 for detecting a work object supplied to the first washing unit 110 and the first washing unit 110 according to a detection signal transmitted from the sensor 140. The control unit 150 further determines whether the injection unit 120 and the second washing unit 130 are operated.

When a work object supplied to the first washing tank 112 is detected by the sensor 140, a detection signal is transmitted to the controller 150, and the controller 150 receives the first nozzle part 112 and the injection nozzle part 122. And transmitting the driving signal to the second nozzle unit 132 step by step.

Therefore, when the workpiece is supplied to the first washing tank 112, the washing water is sprayed from the first nozzle unit 114, the spray nozzle unit 122 when the workpiece is supplied to the spray unit 120 after a first predetermined time. The washing water is sprayed from the second nozzle unit 134 when the workpiece is supplied to the second washing tank 132 after the second predetermined time passes.

On the contrary, when the workpiece is not detected by the sensor 140, the first nozzle part 114, the injection nozzle part 122, and the second nozzle part 132 that are in operation are stopped in stages.

Therefore, the first nozzle unit 114 is stopped when the object to be processed previously passes through the first washing tank 112, and when the object passes through the spray unit 120 after the first set time elapses, the injection nozzle unit 122 ) And stops the second nozzle unit 134 when the work object passes through the second washing tank 132 after the second predetermined time elapses.

Reference numeral 57a denotes a locking portion to which the work object is caught.

Looking at the operation of the electrodeposition coating device according to an embodiment of the present invention configured as described above are as follows.

10 is a flowchart illustrating a control method of the electrodeposition coating apparatus according to an embodiment of the present invention.

1 to 10, the control method of the electrodeposition coating device according to an embodiment of the present invention, the first washing unit 110, the injection unit 120 and the second washing unit 130 to pass through; Detecting the work object supplied to the first washing unit 110 (S10), and if the work object is detected step by step driving the first washing unit 110, the spraying unit 120 and the second washing unit 130 To spray the washing water to the work object (S20).

When the work object is detected when the rail 30 passes through the sensor 140, the washing water is sprayed from the first nozzle part 114 according to the driving signal transmitted from the controller 150, and after the first set time has elapsed. The washing water is sprayed from the spray nozzle unit 122, and the washing water is sprayed from the second nozzle unit 134 after the second predetermined time elapses.

Therefore, the washing water is not sprayed from the spray nozzle unit 122 and the second nozzle unit 132 while the workpiece is passed through the first washing tank 112, and the washing water is sprayed at the moment the workpiece is passed to save the washing water. It becomes possible.

Subsequently, when the work object is continuously supplied along the rail 30, foreign matter remaining on the work object by the washing water sprayed from the first nozzle part 112, the injection nozzle part 122, and the second nozzle part 132. Will be removed.

If the work object is not detected in the step S10 of detecting the work object supplied to the first wash unit 110, the first wash unit 110, the spray unit 120, and the second wash unit 130 may be gradually Blocking the washing water by stopping (S30) is in progress.

Therefore, when the last work object passes through the first washing tank 112, the first nozzle unit 114 is stopped, and when the work object passes through the spray unit 120, the spray nozzle unit 122 is stopped, and the work object is When passing through the second washing tank 132, the second nozzle unit 134 is stopped.

Subsequently, when the work object is supplied to the electrodeposition tank 10 and the electrodeposition coating is started, the work object requiring the thin coating film is supplied to the electrodeposition tank 10 by the first cradle 50a, and the work object requiring the thick coating film is It is supplied to the electrodeposition tank 10 by the 2nd mounting base 50b.

This is done by classifying according to the thickness of the coating film required when mounting the workpiece to the holder 50 supplied to the washing unit 100.

At this time, when the chain 72 moves along the rail 30 by the operation of the driving unit 70, the cradle 50 moves along the rail 30 by the column plate 52a inserted into the chain 72. Since the roller 54 installed on the top of the column plate 52a is rotated along the rail 30, the movement of the holder 50 is made smoothly.

When the cradle 50 moving along the rail 30 passes through the upper portion of the electrodeposition tank 10, the object caught by the hanger 57 of the cradle 50 is received into the electrodeposition tank 10, so that the electrodeposition tank 10 is carried out. ) Fresh water is in contact with the workpiece.

In this case, since the first contact portion 86b and the second contact portion 88b are in contact with the first booth bar 82 and the second booth bar 84, the current supplied through the first booth bar 82 is determined by the first contact part 86b and the second contact part 88b. The current is supplied to the workpiece through the first cradle 50a, and the current supplied through the second bus bar 84 is conducted to the workpiece through the second cradle 50b.

Therefore, the electrodeposition coating process in which the paint is electrodeposited on the workpiece by the anode current supplied to the electrodeposition tank 10 and the cathode current supplied to the workpiece is performed.

Here, the work object that is caught by the first cradle 50a and passes through the electrodeposition tank 10 has a short length of the first bus bar 82, so that a current supply time is short, so that a coating film formed on the outer wall of the work object is relatively thin. .

In addition, since the length of the second booth 84 is longer than that of the first booth 82, the coating object formed on the outer wall of the work piece is caught by the second mounting bracket 50b and passes through the electrodeposition tank 10. It is formed relatively thick.

Of course, it is possible to form the thickness of the various coating film by installing three or more of the number of busbars (82, 84), which can be easily changed and implemented by those skilled in the art to recognize the technical configuration of the present invention another embodiment Detailed drawings or descriptions thereof will be omitted.

During the electrodeposition coating process as described above, since the vibrating bar 92 extending downward from the rinsing 57 moves while maintaining the state adjacent to the uneven portion 96, the lower end of the vibrating bar 57. The vibrating roller 94 installed at the side moves the vibrating bar 92 in the vertical direction while moving along the inclined surface of the uneven portion 96.

When the vibration bar 92 flows in the up and down direction, a rotational motion is generated at the connection portion between the locking ring 57b and the cradle 50, and a rotational movement is also generated at the connection portion between the locking ring 57b and the rinsing 57. Therefore, the rinsing 57 is advanced while flowing in a plurality of directions.

Therefore, when the coating film is formed on the outer wall of the workpiece, the workpiece placed on the rinsing 57 flows in a plurality of directions, thereby preventing the formation of an air layer inside the coating film.

As a result, it is possible to form a coating film having various thicknesses, and to provide an electrodeposition coating apparatus and a control method thereof, which can prevent foreign substances or air layers from remaining in the coating film.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

In addition, although the electrodeposition coating apparatus for suspension members of the vehicle has been described as an example, this is merely exemplary, and the electrodeposition coating apparatus of the present invention may be used in other products other than the electrodeposition coating apparatus for the suspension members of the vehicle.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: electrodeposition tank 30: rail
50: holder 52: support
54: roller 56: mounting portion
58: insulation 70: drive
72: chain 80: current supply unit
82: first booth 84: second booth
86: first terminal portion 88: second terminal portion
90: vibrating unit 92: vibrating bar
94: vibratory roller 96: uneven portion
100: washing unit 110: first washing unit
112: first washing tank 114: first nozzle unit
120: injection unit 122: injection nozzle unit
130: second washing unit 132: second nozzle unit
134: second nozzle unit 140: sensor
150:

Claims (8)

An electrodeposition tank in which the paint is fresh and the anode current is supplied;
A rail installed to maintain a spacing with the electrodeposition tank;
A plurality of cradles installed to be movable along the rails and mounted to allow the work object to pass through the electrodeposition tank;
A driving unit for moving the holder;
A current supply unit supplying a cathode current such that the supply time is different for each cradle;
Vibration unit for flowing the work object passing through the electrodeposition tank; And
It includes a washing unit for removing foreign matter from the object to be supplied to the electrodeposition tank;
The current supply unit is a plurality of busbars arranged to maintain a gap with the cradle;
A plurality of terminal units installed on the holder and in contact with the bus bars;
The length of the busbars is provided differently;
The cradle is a support portion slidably connected to the rail by a roller;
A holder connected to the support and connected to a hanger on which a work object is mounted; And
Electrodeposition coating apparatus characterized in that it is provided between the mounting portion and the support portion to block the current flowing along the mounting portion is transmitted to the support portion and the rail.
According to claim 1, The washing unit,
A first washing unit spraying the washing water onto the work object and passing the work object through the washing water;
A spraying unit spraying washing water to the work object passing through the first washing unit; And
Electrodeposition coating apparatus comprising a second washing unit for spraying the washing water to the workpiece passing through the spray and passing the workpiece through the washing water.
The method of claim 2, wherein the first washing unit,
A first washing tank provided in a moving area of the rail and containing a work object which is washed by fresh water and moved by the holder; And
Electrodeposition coating apparatus comprising a first nozzle unit for spraying the washing water to the work object supplied to the first washing tank.
The method of claim 2,
Electrodeposition coating apparatus characterized in that the injection unit comprises a plurality of injection nozzles for spraying the washing water to the workpiece to be moved along the rail passing through the first washing unit.
The method of claim 2, wherein the second washing unit,
A second washing tank provided in the moving area of the rail and containing the work object which is washed by fresh water and moved by the holder; And
Electrodeposition coating apparatus comprising a second nozzle portion for spraying the washing water to the work object supplied to the second washing tank.
6. The method according to any one of claims 2 to 5,
The cleaning unit includes a sensor for detecting a work object supplied to the first washing unit; And
Electrodeposition coating apparatus further comprises a control unit for determining whether the first washing unit, the injection unit and the second washing unit in accordance with the detection signal transmitted from the sensor.
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