KR101145111B1 - Rack apparatus for surface treating of beam shaped objects - Google Patents

Abstract

PURPOSE: A rack device for surface treatment of a tubular work piece is provided to efficiently and uniformly process a plurality of work pieces and to provide stable current during an anodizing process. CONSTITUTION: A rack device for surface treatment of a tubular work piece comprises a rack frame(10), a first fixing unit(20), a second fixing unit(30), and a holding unit(40). The first fixing unit comprises an upper fitting piece(22) and an elastic plate(24). One end of the elastic plate is connected to an upper horizontal bar(12) while the other end is connected to the upper end of the upper fitting piece. The elastic plate allows the lower end of the elastic plate to move elastically. In the rack frame, a vertical bar(16) and a lower horizontal bar(14) are made of a material with a lower conductivity than the upper horizontal bar and the same quantity of current flows in a portion of a work piece electrically contacting the upper horizontal bar and in a portion of the work piece contacting the lower horizontal bar through the vertical bar.

Description

Rack Apparatus For Surface Treating Of Beam Shaped Objects

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rack apparatus, and more particularly, to a rack apparatus for surface treatment of a large number of elongated workpieces made of aluminum shaped steel which can be used as a door frame of a refrigerator by anodizing or the like.

There are various methods of surface treatment of metal, such as plating, painting, sanding or anodizing, and each has its advantages and disadvantages and characteristics. Anodizing (anodizing) is a surface treatment method in which an oxide film formed on a surface protects a product from external influence by intentionally oxidizing and corroding a metal surface. Anodized surfaces can also be colored, and the coating of ceramic coatings offers the advantage of strong wear resistance and electrical insulation.
The workpiece to be anodized in the present invention is a workpiece 100 made of aluminum shaped steel as shown in Figure 1, the present invention is to a rack apparatus for anodizing the workpiece 100 It will be described with respect to the background art that the necessity of the present invention is required for this.
The workpiece 100 shown in the form of the shaped steel is currently used as a door frame of a refrigerator and its length corresponds to the height of the refrigerator. The workpiece 100 is manufactured by extrusion molding aluminum. However, in order to install in the rack device, the square groove 120 formed by cutting after extrusion molding is provided in the protrusion 103 in the middle portion, and the engaging hole 110 is provided in the bending piece 101 near the upper end. These square grooves 120 and the engaging hole 110 serves as an auxiliary means for installing the workpiece on the rack.

In the conventional anodizing treatment of a number of workpieces 100, there is no suitable device for stably processing without shaking. Therefore, the workpiece 100 may be in contact with the workpiece 100 during the treatment tank and the water washing tank, and the surface of the product may be scratched. Deviations have occurred.

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An object of the present invention for the above problems, in the surface treatment of the workpiece as shown in Figure 1 by the method such as anodizing can be efficiently and uniformly treated a plurality of workpieces, a plurality of workpieces The purpose of the present invention is to provide a rack device that can stably hold a product to prevent defects caused by product contact and to achieve a stable supply of current during anodizing.

In the above object, in the rack device for grating the surface of the workpiece to be made of aluminum-shaped steel in the middle of the square groove is recessed in the middle near the upper end of the long workpiece; A rack frame comprising an upper crossbar, a lower crossbar, and a plurality of vertical bars connecting the upper crossbar and the lower crossbar; A first fixing part fixed to one end of the workpiece as being installed in a plurality along an extending direction of the upper horizontal bar; A second fixing part which is installed along the extending direction of the lower horizontal bar and fixes the other end of the workpiece; It includes a holding portion protruding from the rack frame to suspend the rack frame in a vertically installed structure, such as a busbar;

The first fixing part is inserted into the engaging hole of the workpiece, the upper fitting pin is provided by bending the wire rod; One end is connected to the upper horizontal bar and the other end is connected to the upper end of the upper fitting pin to the surface treatment of the workpiece, characterized in that it comprises an elastic plate which allows the lower end of the upper fitting pin to flow elastically. Is achieved by a rack device.

According to another feature of the present invention, the vertical bar may be a steel structure having a constant cross section, such as H (H), L (L), Di (C), taste (ㅁ) or eye (I) along the longitudinal direction have.

According to another feature of the invention, the upper side bar and the elastic plate may be made of titanium (Ti) material.

According to another feature of the invention, the workpiece is made of aluminum, the surface treatment method may be anodizing.

According to another feature of the invention, the holding portion may be provided by extending in the vertical bar is installed on both edges of the rack frame and then bent in a U-shape to become a hook.

On the other hand, according to the features of the present invention, it has a technical feature to equalize the plating thickness of the upper and lower parts of the workpiece by equalizing the amount of current flowing from the rack as an electrode to the upper and lower parts of the workpiece during anodizing. have.

To this end, the present invention is a rack device for use in anodizing a plurality of workpieces, the upper and lower horizontal bar, and the upper horizontal bar and the upper horizontal bar for electrically contacting and fixing the upper and lower, respectively, of the workpiece In the rack apparatus having a rack frame consisting of a vertical bar connecting the horizontal bar and the lower horizontal bar,

The vertical bar and the lower horizontal bar are made of a material having a lower conductivity than the upper horizontal bar so that the amount of current flows to a portion where the workpiece is in electrical contact with the upper horizontal bar and the lower part through the vertical bar. The horizontal bar is characterized in that the amount of current flowing to the site in which the workpiece is in electrical contact.

The upper horizontal bar is made of titanium, and the lower horizontal bar and the vertical bar are made of aluminum or copper having a lower resistivity compared to the titanium, and thus the amount of current flowing from the upper and lower bar to the workpiece. You can make it even.

According to the configuration as described above, the workpiece by the upper fitting pin by the elastic force to the elastic plate by the force can be stably fixed to the rack frame by this force. The rack apparatus of the present invention can be used only by different materials in various surface treatment processes such as plating, painting or anodizing.

According to the present invention, by holding a plurality of workpieces stably, it is possible to prevent the occurrence of contact between the workpieces and to obtain a uniform surface treatment quality. In addition, by making the cross section of the vertical bar in the form of a steel, it is possible to mitigate the impact with the treatment liquid when the rack frame is submerged in the treatment tank.

In addition, in the present invention, since the distance between the upper flow bar and the lower bar is close to the lower flow bar, the current flows from the bus bar, which is the electrode to which the rack device is connected, so that the amount of current flowing to the upper bar is relatively large, resulting in a difference in the upper and lower plating quality. The problem that can be applied to the upper horizontal bar by applying a material with a large resistance value lowers the voltage value at the point of contact with the workpiece by equalizing the amount of current flowing through the upper and lower parts of the workpiece There is an effect of equalizing the plating thickness.

1A is a perspective view of a workpiece to which the present invention is applied, and FIG. 1B is a plan view thereof.
Figure 2 is a perspective view of the rack device for the surface treatment of the workpiece according to an embodiment of the present invention, Figure 3 is a front view, Figure 4 is a side view.
5 is a perspective view of a rack apparatus for surface treatment of a workpiece according to an embodiment of the present invention, in particular, in a state where the workpiece is installed.
FIG. 6 is a rear perspective view of FIG. 5, showing a partially enlarged state.

Hereinafter, specific details of the present invention will be described in detail with reference to the accompanying drawings.

The rack apparatus of the present invention is for gripping a plurality of workpieces 100 to collectively surface treatment. The rack apparatus has the rack frame 10 as a basic component. The rack frame 10 includes an upper side bar 12, a lower side bar 14, and a plurality of vertical bars 16 connecting the upper side bar 12 and the lower side bar 14. The vertical bar 16 may be composed of a vertical bar 16 'installed at the edge and a vertical bar 16 "installed in the middle. The vertical bar 16 installed in the middle according to the horizontal length of the rack frame 10 ( 16 ") will be determined.

" 형태로 되어 있다. 본 실시예에 의하면 상부가로바(12)와 탄성판(24)은 티타늄(Ti) 또는 그 합금으로 되어 있어 내구성이 높다. 상부가로바(12)와 탄성판(24)을 제외한 래크프레임(10)의 다른 구성요소는 알루미늄, 동 또는 그들의 합금일 수 있다. 탄성판(24)을 티타늄으로 하는 경우 래크프레임에 흐르는 전류값을 제한할 수 있는 효과를 얻을 수 있다. A plurality of first fixing parts 20 for fixing one end of the workpiece 100 are installed in the upper crossbar 12 along the extending direction of the upper crossbar 12. According to the present embodiment, the first fixing part 20 may include an upper fitting pin 22 having a hook shape that is inserted into the workpiece 100. In addition, the first fixing part 20 is one end is connected to the upper side bar 12, the other end is connected to the upper end of the upper fitting pin 22, the elastic plate to allow the upper fitting pin 22 to flow elastically And (24). The elastic plate 24 is a plate and has a cross-section to increase elastic force.

According to this embodiment, the upper crossbar 12 and the elastic plate 24 are made of titanium (Ti) or an alloy thereof, and thus have high durability. The upper crossbar 12 and the elastic plate 24 have high durability. Other components of the rack frame 10 except for may be aluminum, copper, or alloys thereof, and when the elastic plate 24 is made of titanium, it is possible to obtain an effect of limiting a current value flowing in the rack frame.

The elastic plate 24 may be connected to the upper crossbar 12 and the upper fitting pin 22 by bolting or welding.

The upper fitting pin 22 may be made by bending both ends of the wire rod of a predetermined length, and the lower end thereof is bent in a V shape so as to be bound to the screw coupling part 120 of the workpiece. The upper end is fixed to the elastic plate 24 by welding or the like. The lower end of the upper fitting pin 22 is fitted to the engaging hole 110 provided in the upper end portion of the workpiece 100. The workpiece 100 is provided with a fixing means for fastening itself to the rack device as described above.

A plurality of second fixing parts 30 for fixing the lower end of the workpiece 100 are installed in the lower horizontal bar 14 along the extending direction of the lower horizontal bar 14. Of course, the number of the first fixing section 20 and the second fixing section 30 can be changed sufficiently depending on the situation.

According to the exemplary embodiment of the present invention, the second fixing part 30 has one end connected to the lower horizontal bar 14, and the other end of the second fixing part 30 is provided by the square groove 120 of the workpiece 100. It may include a lower fitting piece 32 is fixed to the. The tip of the lower fitting piece 32 is partially bent downward, and the bending groove 36 is slit-shaped in the middle as shown in FIG. 2. The width of the binding groove 36 corresponds to the thickness of the plate forming the workpiece 100.

According to the exemplary embodiment of the present invention, the vertical bar 16 may have a longitudinal direction such as H, L, L, Di, C, or I along the longitudinal direction. It may be a shaped steel structure having a constant cross section. The cross section of the vertical bars 16 is thus used to reduce the resistance when the rack apparatus is submerged in the plating liquid. This minimizes the amount of scattering of the plating liquid and minimizes the impact on the rack device at the moment of contact with the processing liquid (or plating liquid), thereby increasing the working speed. For a similar purpose, the lower end 16a of the vertical bar is also cut into an inclined surface.

Meanwhile, the holding part 40 is provided to suspend and transport the rack device or to immerse it in the plating liquid. The holding part 40 may be provided by extending the vertical bars 16 'installed at both edges of the rack frame 10 and then bending them in a U shape to become hooks. Holding unit 40 is a hook means for mounting the rack device on the rack bar, hanger or busbar. Since the holding part 40 can be modified in various forms according to the specific use of the rack device, the scope of the present invention should not be limitedly interpreted as shown.

According to an embodiment of the present invention, the workpiece 100 is made of aluminum, and the surface treatment technique performed by the rack apparatus may be anodizing. In the case of anodizing, the upper horizontal bar 12, the lower horizontal bar 14, so that the amount of current flowing into the upper horizontal bar 12 and the lower horizontal bar 14 in the plating current flowing in the plating bath is similar. By varying the material and thickness of the vertical bar (16) gives a resistance value element.

For this purpose, the upper crossbar 12 is preferably titanium, and the vertical bar 16 and the lower crossbar 14 are preferably made of aluminum or copper having a lower specific resistance than titanium. In addition, the upper horizontal bar to which titanium is applied may have a thin thickness only at a predetermined portion of both ends to increase resistance value elements, thereby reducing potential variation with the lower horizontal bar, thereby reducing the amount of current variation. In the center part, it is possible to reduce the amount of electric current deviation between the fitting piece located at the close position and the central part by having a thick thickness and a thick surface area to flow a large amount of current.

According to the above configurations, the operator first inserts the upper end 110 (see FIG. 1) of the workpiece into the upper fitting pin 22, and then the lower end 115 (see FIG. 1) of the lower fixing piece of the second fixing portion ( 32). Then, the fitting groove 22a is fastened to the screw coupling part 120 and the workpiece 100 can be firmly fixed by the elasticity of the elastic plate 24 (see FIG. 6).

As shown in FIG. 4, the upper fitting pin 22 forms a vertical state (illustrated by a dashed line) in a state in which the workpiece 100 is not installed, and then burns downward when the workpiece 100 is coupled. Sexually fluid. The upper fitting pin 22 and the upper fitting pin 22 have a width (20 to 40 mm) that is easy to hold by hand and have a rod shape of about 200 to 300 mm in length, making it easy to grip and pull or push by hand. . Thus, the operator can install or separate the plurality of workpieces 100 from the rack apparatus in a very convenient way.

The rack apparatus of the present invention was designed for use in the surface treatment process by anodizing. However, the rack apparatus of the present invention is provided with a plating bath containing a plating liquid and can be used in a surface treatment facility having a structure in which a workpiece is to be immersed in the plating liquid. For example, the rack apparatus of the present invention may also be used for anodizing, general electroplating or hot dip galvanizing. However, based on the technical common knowledge of those skilled in the art, there should be a change such as replacing the material of some components with insulation. And variations of this extent are within the scope of the invention.

10: rack frame 12: upper horizontal bar
14: lower horizontal bar 16: vertical bar
20: 1st fixed part 22: upper fitting pin
22a: fitting home 30: the second government
32: lower fitting 100: workpiece
120: square groove

Claims (8)

delete delete delete delete delete delete In the rack device for gripping the workpiece 100 is made of aluminum-shaped steel in the middle and the square groove 120 is dug in the middle and the engaging hole 110 is provided near the top; A rack frame (10) comprising an upper crossbar (12), a lower crossbar (14), and a plurality of vertical bars (16) connecting the upper crossbar (12) and the lower crossbar (14); A first fixing part 20 fixed to one end of the workpiece 100 as being installed along the extending direction of the upper horizontal bar 12; A plurality of second fixing parts 30 which are installed along the extending direction of the lower horizontal bar 14 to fix the lower ends of the workpieces 100; It includes a holding portion 40 protruding from the rack frame 10 to suspend the rack frame 10 in a vertically installed structure, such as a busbar;
The first fixing portion 20 is inserted into the engaging hole 110 of the workpiece 100, the upper fitting pin 22 is provided by bending the wire rod; One end is connected to the upper horizontal bar 12 and the other end is connected to the upper end of the upper fitting pin 22 to the elastic plate 24 to allow the lower end of the upper fitting pin 22 to flow elastically. Configured;
The vertical bar 16 and the lower horizontal bar 14 are made of a material having a lower conductivity than the upper horizontal bar 12 so that the workpiece is in electrical contact with the upper horizontal bar 12. The amount of current flowing to the site of the workpiece and the workpiece to be in electrical contact with the lower horizontal bar 14 through the vertical bar 16, the rack for the surface treatment of the workpiece, characterized in that Device. The upper bar 12 is made of titanium, and the lower bar 14 and the vertical bar 16 are made of aluminum or copper having a lower resistivity compared to the titanium. The rack apparatus for surface treatment of the workpiece, characterized in that the amount of current flowing from the upper crossbar (12) and the lower crossbar (14) to the workpiece 100 is equal.

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