JPH11343599A - Surface treatment and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To electrolytically surface-treat a material to be treated so that the touch traces of a frame are not left by fixing one end of the material to a supporting member in an electrolytic cell, receiving the other end with the vertically oscillating frame, throwing the latter end up, dropping it by gravity and repeating the process. SOLUTION: One end of a material 4 to be treated such as long-sized aluminum shape and sheet is rotatably fastened by a bolt 21 to a supporting member 2 chargeable from a carrier bar 1, and the other end is received by a frame 3. The material 4 is hung down from the carrier bar 1, dipped in an elecrolytic cell from a horizontally suspended line and subjected to such surface treatment as electrolytic degreasing, electropolishing, anodizing and electrolytic coloring. In this case, the frame 3 is vertically oscillated by an air cylinder, etc., through the carrier bar 1, and the free end of the material 4 is thrown up and dropped by gravity. The oscillating stroke is controlled to >=50 mm, the descending speed is increased above 20 m/min which is higher than the free-falling speed of the material 4, and the surface-treating time of the free end is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded material or plate of a metal material, particularly a long (for example, about 6 m or longer) aluminum (hereinafter, unless otherwise specified, also includes an aluminum alloy). The present invention relates to an electrolytic surface treatment method suitable for electrolytic surface treatment in a horizontal suspension line and having good workability and yield, and an apparatus therefor.

[0002]

2. Description of the Related Art As a building material used for a house, a building, etc., a structural material used for a bridge, a dam, a road, a tunnel, etc., a large amount of a frame material such as a steel frame material, a channel, a curtain wall or a surface material. Metal structural materials are used. In particular, in recent years, aluminum materials have been widely used in the field of conventional steel building materials and structural materials because of their lower prices and their excellent lightness and workability in recent years. These metal structural materials generally have high toughness and strength, but as they are manufactured, they have an oxide film and so on, so surface treatment is required for the purpose of increasing commercial value and increasing corrosion resistance. The electrolytic surface treatment method is widely used as one of the surface treatment methods for these metal materials. Hereinafter, aluminum will be described as a representative example, but when electrolytic surface treatment is performed on other metal materials, the electrolytic surface treatment method of the present invention can be similarly applied.

[0003] The basis of the electrolytic surface treatment of aluminum is the formation of an oxide film. Anodizing treatment using oxidizing property by the electrolytic method, coloring method using a porous film, and the like are also available. Even in the treatment method, there are electrolytic degreasing, electrolytic polishing, and the like as pretreatment for forming an oxide film.
Although there are many types of aluminum alloys, the anodic oxidation characteristics, the appearance of the coating, the performance and the brilliant characteristics may be affected by the material factors such as alloy components. It is necessary to adopt a method, but in any case, in the case of a long material to be processed using a horizontal suspension line electrolytic cell, the support member 2 fixed to the carrier bar 1 as shown in FIG. Both ends are fixed electrically with bolts 21 or the like or wound with an aluminum wire or the like, and surface treatment has been performed in an electrolytic cell (not shown). However, this process requires a lot of time and labor to fix the material 4 to be processed, and it is necessary to cut and remove the fixed portions at both ends after the surface treatment, so that workability and yield are poor and improvement is required. Had been.

As an improved method, as shown in FIG. 5, one end of a long material to be processed 4 is fixed, and the other end is suspended by a ladder-shaped receiving frame 3 for electrolytic treatment. It has been developed. According to this method, the work of fixing the end portion is only half, so that the work efficiency is improved, but it is still unavoidable that a touch mark is generated at the contact portion of the receiving frame 4. This touch mark is often regarded as a defect in quality depending on the type of product, and it is necessary to cut the surface after the surface treatment as in the case of fixing both ends, and the yield is not improved. As a surface treatment of a long material to be treated, an improvement in a method of fixing the material to be treated and a development of an electrolytic surface treatment method that does not leave a trace of a touch are required for improving productivity and yield.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a metal material,
In particular, when a long material to be treated is subjected to surface treatment using a support member of a horizontal suspension line, one end is fixed, and the other end is supported using a receiving frame. It is an object of the present invention to develop a surface treatment in which a touch mark of a receiving frame does not remain at an end of the frame.

[0006]

According to the present invention, [1] one end of a material for surface treatment (processed material) is fixed to a support member to which power can be supplied from a carrier bar, and the other end. Electrolytic surface treatment method characterized by receiving this by a receiving frame that swings up and down, lifting the material to be treated upward, and performing surface treatment while repeating dropping by its own weight,
[2] The electrolytic surface treatment method according to the above [1], wherein the electrolytic surface treatment method is any one of electrolytic degreasing, electrolytic polishing, anodic oxidation, and electrolytic coloring, [3] the material to be treated is long. The electrolytic surface treatment method according to the above [1], which is a long mold material or a plate material, [4] The electrolytic surface treatment method according to the above [3], wherein the material to be treated is a long aluminum material or an aluminum alloy material. [5] The electrolytic surface treatment method according to [1], wherein the swing stroke of the receiving frame is 50 mm or more, the descending speed is 20 m / min or more, and the speed is greater than the free falling speed of the material to be treated.

[6] An electrolytic cell for a horizontal suspension line equipped with a carrier bar, one end of a material to be treated is fixed in the electrolytic cell, and fixed to a carrier bar for supplying power to the material to be treated. A supporting member, a receiving frame for receiving the other end of the material to be processed in the electrolytic cell and swinging the receiving frame up and down, and an oscillating means for swinging the receiving frame up and down in the electrolytic cell; [7] The electrolytic surface treatment apparatus according to the above [6], further comprising: means for vertically swinging a receiving frame formed of any one of an air cylinder, a hydraulic cylinder, an eccentric cam and a non-circular roll. The above objectives were achieved by developing.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In the electrolytic surface treatment method of the present invention, the material to be treated is not particularly limited in its length as long as the material is subjected to surface treatment with both ends fixed.
It is effective when applied to a relatively long shape such as a long extrusion material or a plate material which is subjected to surface treatment in a horizontal suspension line electrolytic cell. As for the material, it can be applied to a material subjected to electrolytic surface treatment, for example, an aluminum material, a steel material, and the like. Particularly, it is effective to apply to an aluminum material to which an electrolytic surface treatment method is frequently used. In addition, as the electrolytic surface treatment method, the subject of the treatment method such as electrolytic degreasing as a pretreatment, electrolytic polishing and anodic oxidation and electrolytic coloring for forming an oxide film does not matter, but the ratio of the cut length after treatment is not limited. The effect is high when applied to a surface treatment in the case of a high material to be processed and when the fixed time occupies a large proportion of the fixed time in comparison with the fixed time.

The present invention will be described below with reference to the drawings. In the electrolytic surface treatment method of the present invention, as shown in FIG. 2, a support member 2 made of a conductive material fixed to a carrier bar 1 for supplying a current to a material to be treated 4 is provided with one of the materials to be treated. Is fixed by bolts 21 or aluminum wires, and the other end is mounted on a receiving frame 3 swinging up and down as shown in FIG.
And the workpiece 4 is set as shown in FIG. The swinging of the receiving frame 3 up and down may be performed together with the carrier bar 1 to which the receiving frame 3 is fixed as shown in FIGS. 1 and 2 or may be fixed to the carrier bar 1 (not shown). Alternatively, a method may be used in which only the receiving frame 3 that allows the inside of the bearing to move up and down is swung up and down. Carrier bar 1
When electric current is supplied from the carrier bar 1 to the workpiece 4 via the carrier bar, the receiving frame 3 made of a conductive material is directly connected to the carrier bar 1 or the receiving frame moves up and down in the bearing with the carrier bar 1. It is preferable that a flexible conductive material is connected to 3 so that power can be supplied. If power supply is not required, the receiving frame 3 may be made of a non-conductive material. If power supply to the material to be processed 4 is not sufficient only from the fixed support member 2, the current should also be supplied from the receiving frame 3.

The vertical swing of the receiving frame 3 is at least 50 mm or more as a swing stroke, preferably 50 to 15 mm.
The swinging speed is 0 mm, and the lowering speed of the receiving frame is important. At least 20 mm / min is required, which is lower than the free falling speed of the free end of the workpiece 4 inserted into the receiving frame 3. Should be able to do so. When the descending speed is lower than the free end falling speed, the free end does not float in the liquid, but remains attached to the receiving frame 3, so that the effect is different from the case where the conventional receiving frame is used. Will not be. This way,
The free end of the material to be treated 4 is lifted up by the receiving frame when ascending, but the receiving frame 3 descends at a high speed, so that the free end falls freely while following the receiving frame 3 while floating in the liquid. Until it is received by the receiving frame 3, the entire surface of the free end can be uniformly subjected to the surface treatment. In addition, the swinging of the receiving frame 3 causes the stirring of the electrolytic solution, and by this stirring, the non-uniformity of the partial concentration of the electrolytic solution in the long horizontal suspension line electrolytic cell 6 can be prevented and the uniformity can be maintained. become.

The vertical swinging means 5 of the receiving frame 3 is not particularly limited as long as it satisfies the above requirements. For example, non-circular rolls in the form of air cylinders, hydraulic cylinders, eccentric cams or rugby balls can be used. Maintenance, acid resistance,
The air cylinder is most advantageous in consideration of the descent speed and the like. It has been found that the method of floating the free end of the material to be treated 4 in the liquid by such a swing is particularly effective when used in an anodic oxidation tank. It was confirmed that the trace could be eliminated. The same thing is naturally effective in other electrolytic operations, for example, electrolytic degreasing as a pretreatment of the anodizing step, electrolytic polishing, and the like, and such an effect is unique to the electrolytic surface treatment of aluminum. However, it is natural that the present invention can be applied to all the electrolytic anodic oxidation treatment methods for a metal material to be treated.

[0012]

According to the present invention, one end is fixed and the other end is received when electrolytically treating a metal material, particularly a long material to be treated, using a support member of a horizontal suspension line. In the electrolytic surface treatment method of supporting using a frame, in order to perform a surface treatment that does not leave a touch mark of the receiving frame on the other end, one end of a material for surface treatment (material to be processed) is removed. The surface is fixed to a support member that can be supplied with power from the carrier bar, and the other end is received by a receiving frame that swings up and down, and the material to be processed is lifted up and dropped by its own weight. Is an electrolytic surface treatment method. For this reason, the fixing work can be performed at one end, so that not only the work efficiency is high, but also the remaining end such as a touch mark that has been cut and discarded after the surface treatment is completed at one end, thereby improving the yield. The present invention is a highly productive electrolytic oxidation treatment method and an apparatus therefor, and is an extremely effective technique.

[Brief description of the drawings]

FIG. 1 shows an example of an electrolytic cell provided with a carrier bar swing means of the present invention.

FIG. 2 is a diagram illustrating a holding state of a material to be processed in a case of swinging.

FIG. 3 is an example of a positional state of a receiving frame and a workpiece when swinging.

FIG. 4 shows a conventional holding state in which both ends are fixed to a support member of a material to be processed.

FIG. 5 is a holding state in which only one end of a conventional material to be processed is fixed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carrier bar 2 Support member 21 Bolt 3 Receiving frame 4 Material to be processed 5 Vertical rocking means 6 Electrolyzer

Claims (7)

[Claims] 1. A material for surface treatment (material to be treated) is fixed at one end to a support member capable of supplying power from a carrier bar, and the other end is fixed by a receiving frame which swings up and down. An electrolytic surface treatment method, wherein the surface treatment is performed while repeating receiving, lifting the material to be treated upward, and dropping the material under its own weight. 2. The electrolytic surface treatment method according to claim 1, wherein the electrolytic surface treatment method is any one of electrolytic degreasing, electrolytic polishing, anodic oxidation, and electrolytic coloring. 3. The electrolytic surface treatment method according to claim 1, wherein the material to be treated is a long mold or plate. 4. The electrolytic surface treatment method according to claim 3, wherein the material to be treated is a long aluminum material or an aluminum alloy material. 5. The electrolytic surface treatment method according to claim 1, wherein the swing stroke of the receiving frame is 50 mm or more, the descending speed is 20 m / min or more, and the speed is higher than the free falling speed of the material to be treated. 6. An electrolytic cell for a horizontal suspension line provided with a carrier bar, one end of a material to be processed is fixed in the electrolytic cell, and a support fixed to the carrier bar for supplying power to the material to be processed. An electrolytic surface comprising a member, a receiving frame capable of receiving the other end of the material to be processed in the electrolytic cell and vertically swinging the same, and a swinging means for vertically swinging the receiving frame in the electrolytic cell; Processing equipment. 7. The electrolytic surface treatment apparatus according to claim 6, further comprising: means for vertically swinging a receiving frame formed of any one of an air cylinder, a hydraulic cylinder, an eccentric cam and a non-circular roll.