KR19980022603A - Iron plate bonding method for washing tank of washing machine - Google Patents

Abstract

The present invention relates to a method for joining a steel plate for a washing tub of a washing machine.

To solve the problem of excessive air input due to the operation of joining the steel plates of a considerable size, resulting in decreased productivity and frequent accidents of safety accidents,

The ends of the first iron plate 100 and the second iron plate 200 constituting the washing tub are molded into V-shaped bent portions 120 and L-shaped bent portions 210, respectively, and then interlocked at both ends thereof. By lowering the upper plate 320 to perform a series of operations by crimping the connection of these two iron plates,

Not only does it significantly increase productivity, it also fundamentally prevents safety accidents.

Description

Iron plate bonding method for washing tank of washing machine

The present invention relates to a method for joining a steel plate for a washing tub of a washing machine, and more particularly, to an iron plate joining method capable of improving productivity and preventing safety accidents by automating the joining operation of a large steel plate for a washing tub.

A washing machine washing tub of the general shape is composed of iron plates of considerable size bonded to each other, and the joining is usually performed by seaming by welding or pressing.

In other words, the tip of each iron plate is simply overlapped with each other and inserted between the seaming rollers or welded, or the two joining edges of the iron plate are firstly bent into a pair of corresponding shapes to be engaged with each other, and then pressed and pressed into the press seam. By

Of these two joining methods, the latter banding and compression seaming method is more preferable in terms of joining strength and is more common.

Here, look at the iron plate bonding method for the washing machine washing tank by the bending and compression as follows.

That is, any one of the first iron plate 10 and the second iron plate 20 of FIG. 1 having the tip portions bent in a shape corresponding to each other by the primary bending operation is inserted on the lower plate 41 of the bonding mold 40. The first fixing pin 50 is inserted first.

At this time, it is a matter of course that the holes 11 and 21 for the joining operation are formed at predetermined portions of the respective iron plates 10 and 20.

Then, as shown in Figs. 2 and 3, the other end of the iron plate is engaged with the front end of the mating iron plate while being fitted to the second fixing pin 50 '.

When the first iron plate 10 and the second iron plate 20 reach the state of FIG. 3 in which the branches are aligned, the upper plate 42 of the bonding die 40 is lowered to compress the tip connecting portions of the two iron plates (FIG. 4).

As a result, as shown in FIG. 5, the first iron plate 10 and the second iron plate 20 are strongly bonded to each other.

However, the conventional iron plate joining method for a washing machine washing tank has some inherent problems while the bonding strength is excellent.

First of all, since the iron plates are of considerable size, handling them is not very easy.

In other words, excessive input labor and the resulting decrease in productivity can be said to be a major problem.

In addition, due to the weight and shape characteristics of the iron plate, safety accidents that occur frequently in the handling process are a serious problem more than the input maneuver.

The present invention has been made to solve the above-mentioned conventional problems, by automating the joining operation, to provide a method for joining the iron plate for a washing machine washing tank that can significantly increase productivity as well as prevent accidents. Its purpose is.

The object of the present invention is to engage the first iron plate having the V-shaped bent portion and the second iron plate having the L-shaped bent portion on the lower plate of a predetermined mold, and then press down the upper end portion of the two iron plates to press the crimp by pressing down the mold upper plate. Is achieved.

1 is a cross-sectional view showing a mold-like fixed state of a conventional first iron plate,

2 is a cross-sectional view showing the interconnection process of the front end portion of the first iron plate and the second iron plate;

Figure 3 is a cross-sectional view showing the completion state of the mold on the two iron plate;

4 is a cross-sectional view showing a state in which two iron plates are pressed by a mold having a predetermined shape;

5 is a cross-sectional view showing a completed state of the iron plate bonding according to the above process,

Figure 6 is a cross-sectional view showing a connection between the iron plate by the bonding method of the embodiment of the present invention,

Figure 7 is a cross-sectional view showing the two iron plate pressing process by the bonding method of the embodiment of the present invention,

8 is a cross-sectional view showing a state in which two iron plates are pressed by the bonding method of the embodiment;

9 is a cross-sectional view showing a completed state of the iron plate bonding according to the bonding method of the embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100: first iron plate 110: left side

120: bending part 200: second iron plate

210: bend

Hereinafter, the iron plate bonding method of the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, the iron plate for applying the iron bath bonding method of the embodiment of the present invention is the first iron plate 100 and the second iron plate 200 of the shape as shown in Figure 6, through the bending operation, of the first iron plate 100 The one end portion is bent in a V shape, while the one end portion of the second iron plate 200 coupled thereto is bent in a L shape.

At the time of joining, the first iron plate 100 is placed so that the V-shaped bent portion 120 is positioned in a predetermined groove formed on the mold lower plate 310, and then the second iron plate 200 is also in the same mold shape. 6, but the front bent portion 220, 120 of the two iron plate is engaged with each other.

At this time, the left side 110 of the V-shaped bent portion 120 formed at the front end of the first iron plate 100 must be upright, so that the tip-shaped bent portion 210 of the second iron plate 200 is the first iron plate. When entering the falling into the V-shaped bent portion (100) of (100) should not be subjected to any interference.

To this end, the first iron plate 100 is bent or formed by bending the first iron plate 100 so that the V-shaped bent portion 120 at the tip thereof on the horizontal plane satisfies the above condition, or by using a separate support (not shown). By supporting the right end of the, the left surface 110 of the V-shaped bent portion 120 may be made upright.

Of course, the former method is more preferable for the process simplification.

In addition, the second iron plate 200 in this regard should be in a state in which the right side of the L-shaped bent portion 210 is in close contact with the right side of the V-shaped bent portion 120 and the main flat portion is inclined to the horizontal level or less.

Thus, as can be seen through the operation state of the bar shown by the two-dot chain line, the bent portion 210 of the second iron plate 200 is the tip of the first iron plate 100 while going through an extremely simple free fall process It naturally enters into the V-shaped bent portion (120).

Subsequently, pressing down the front end portions of the two iron plates by lowering the upper mold plate 320 proceeds to the pressing process as shown in FIG. 7.

When the upper plate 320 is lowered to the minimum, as shown in FIG. 8, the two iron plates are completely compressed in the grooves of the lower plate 310 to finally form the bonded shape of FIG. 9.

As shown in FIG. 2, which shows a conventional tip connection process, it is not necessary to lift a considerable size of iron plate and make efforts to coincide with a mating iron plate and a fixing pin at the same time. Risk is essentially excluded.

Here, each of the steps constituting the iron plate bonding method for a washing tank of the washing machine of the embodiment of the present invention, that is, the first iron plate stationary step, the second iron plate stationary step, the pressing step and the take-out of the assembly is entirely carried out by automated equipment Reveal.

However, even if the operator directly performs some or all of the entire process, as long as the tip of the two iron plate is formed into the V-shaped and L-shaped bent portion of the above shape is included in the scope of the present invention.

That is, according to the degree of automation of the machine and the worker's intention, the iron plate joining operation of the washing machine washing tank of the present invention may be performed by automation or may be limited to the degree of work simplification.

As described above, the iron plate joining method for a washing machine washing tub of the present invention has the effect of significantly improving productivity and preventing safety accidents by automating the joining operation of a large iron plate.

Claims (4)

In the method of joining the two iron plates constituting the washing machine washing tub, the first iron plate 100 is placed on the mold lower plate 310 with the left surface 110 of the V-shaped bent portion 120 formed at its tip end upright. The second iron plate 200 having a step-like bent portion 210 of the shape corresponding to the V-shaped bent portion 120 and the V-shaped bent portion 120 is also placed on the mold lower plate 310 and the two iron plates 100 and 200. Characterized by comprising the step of engaging the front end bent portion (120,210) of the upper and lower die top plate 320 from above to press the connecting portion between the iron plate and the step of taking out the completed iron plate from the mold Iron plate joining method for washing tub of the washing machine to be. The method according to claim 1, wherein the first iron plate (100) is band-molded so that the left side (110) of the tip V-shaped bent portion (120) is upright on a horizontal plane. The method of claim 1, wherein the left side 110 of the V-shaped bent portion 120 is upright by supporting the right end of the first iron plate 100 with a separate supporter. . The method according to any one of claims 1 to 3, wherein the mold lower plate 310 is provided with a groove having a predetermined shape.