KR101301154B1 - a right angle drawing device of metal square vessel and right angle metal square by the device - Google Patents

Abstract

The present invention relates to a drawing forming apparatus and a metal square container of a metal rectangular container having a right angled corner, and to the upper part of the molding machine is installed a vertically punching operation and the base 512 receiving the upward elasticity of the spring inside the molding hole As a drawing molding machine installed, the molds of the drawing molding machine are formed into two sets of fixed dies and assembly dies, each of which is configured to be combined in a lattice form using the female assembly means, and the curvatures formed on the upper surfaces of the dies. In the middle of the surface, a part of the upper surface is formed with a horizontal pinhole, and a metal pin roller is easily installed in each pin hole so that four metal pin rollers are arranged in a quadrangular shape to form a square forming hole. The unfinished square metal container, which has been drawn several times by the method, is pressed into the square forming hole and It is characterized in that to be molded into a square metal container having a right angle corner.

Description

Drawing-forming apparatus for rectangular metal containers with right angled corners and square metal containers molded by the same {a right angle drawing device of metal square vessel and right angle metal square by the device}

The present invention relates to a drawing molding apparatus for a metal rectangular container for storing various industrial items such as kitchen utensils, small electric, electronic parts case and the like, and more particularly to a rectangular metal container produced by the molding device. Drawing a rectangular metal container with a right angled corner, characterized by forming the corners of the container at right angles, in particular to accommodate electrical and electronic components without gaps, to ensure the stability of the storage and to contribute to the miniaturization of electrical or electronic devices. To provide a molding apparatus and a square metal container.

In general, drawing is a machining process in which a plate-shaped metal material is stretched by using a mold and pressed into a desired shape such as a cylindrical shape or a hemispherical shape. The machining method used is a die drawing using a die and a punch press.

In addition, deep drawing techniques are used to form deep-headed containers.

In the deep drawing process, a forced lubrication means is required because the contact time between the material and the mold is long and the degree of friction side effects is large. Therefore, the drawing process is easy only when the friction between the punch and the die is small, so the lubricating oil is forced to be injected into the die surface and the punch surface.

Metal containers molded by drawing processing are known as cylindrical containers and rectangular containers, and the shape of the container is selectively used according to the size and shape of the contents (product) to be stored.

Since circular container products have no edges, the product can be continuously formed by drawing processing in the usual processing sequence without difficulty.

However, unlike the cylindrical container, since the rectangular container has corners on all four sides and the boundary between the bottom and the motto, it is difficult to process and the defect rate is high. In other words, if the rectangular metal container is to be formed by drawing work, it is cumbersome to perform the molding process a few more times because of the angle of the corner and the straight sides of the four sides.

The above-described rectangular metal container and its drawing technique will be described with reference to the accompanying drawings.

In general, in the industrial field, a rectangular metal container 100 as shown in FIG. 1 has been widely used to receive an assembly P having a function added to an original function.

By the way, the rectangular metal container 100 is a corner between each mungdu and muddy formed perpendicular to the quadrilateral of the floor and the bottom and the corner of the motto is a curved arc-shaped surface (101, 102) is not a right angle, When the parts are stored inside the container, as shown in FIGS. 2 and 3, the spaces 103 and 104 are opened between the inner surface of each mundo and the assembly P and the bottom and the assembly P. P) is stored. In this case, first, since the instability in which the assembly P is stored in a loose shape by the spaces 103 and 104, and the volume of the square metal container 100 is largely formed by the spaces 113 and 104, For example, there is a problem in that the main body of the portable telephone must be largely molded.

Therefore, when drawing and molding a rectangular metal container, if the corners of the four sides can be molded at right angles, the product can be stored without any gap and can be usefully used.However, due to the specificity of the metal material and the special condition of the rectangular shape, Right angle molding is not easy with a molding machine. Therefore, the square metal containers currently manufactured and supplied are using the product of FIG. 1 in which all corners are rounded (R / round).

If the container having a right angled corner is formed by using the conventional drawing molding machine as shown in FIG. 4, the right angled molding is not realized due to a problem in which slip friction occurs with the upper end of the molding hole and the edges are torn or burst. I'm not doing it.

The drawing molding method of the square metal container 100 used in the prior art is a molding method for gradually increasing the product depth by sequentially drawing the product using a molding machine having a punch and a forming hole for each molding process shown in FIG. This is a technology that uses a sliding friction action to force the product to be pressed into the forming hole.

In addition, the drawing molding machine of the square metal container 100 used in the prior art, as shown in Figure 4, the edge of the upper end of the square forming hole 202 formed in the center of the die 201 to chamfer the curved surface 203 And a punch 204 for lifting up and down through the square hole 202 and a base 205 upward and downward from the square hole 202 to face the punch 204 upward and downward. The spring 206 is provided to receive elasticity.

In general, the work of forming the square metal container 100 of FIG. 1 using a drawing molding machine sequentially forms a mold having a deep depth from a mold having a low depth in a circularly cut metal disc T as shown in FIG. 5. The metal disc is drawn into the desired shape while passing it through.

When the rectangular metal container 100 is formed by only one operation of the punch 204, the metal disc T is broken, and thus, a plurality of drawing molding machines (about 6 units) having different depths and shapes of forming holes are installed. To form a square metal container 100 is formed by sequentially molding six times as shown in FIG. The container having a depth is formed by the sequential process, and finally, the finished product T6 having a form of a square metal container 100 is molded in the last six times (T6).

If a container having a right angled corner is formed by using the conventional drawing molding machine, the drawing device may be damaged due to a problem such as tearing or bursting of the edge due to a forced slip friction between the upper end of the forming hole and the material. The furnace is a situation that the molding of the right angle corner is not realized.

Still, since manufacturers want to use a rectangular corner type container, recently, a rectangular metal container 300 having a right angled corner as shown in FIGS. 6 and 7 is manufactured and supplied.

6 and 7, the square metal container 300 is a hand-made product manufactured by welding each of the corners 301 in a state in which the metal flat plate is cut in a cross shape and folded on all sides, and is not a drawing molded product.

Although the above-described product is made smaller in volume than the conventional product of FIG. 1 and has a right angled edge, the metal plate must be cut crosswise, and the side plates of the four sides are folded up one by one and weld 301 is very cumbersome. In addition to the high molding cost, there is a problem in that the productivity is low because the molding time is long.

An object of the present invention is to provide a drawing molding apparatus having a new structure capable of forming the corners of a rectangular metal container at right angles.

Another purpose is to install a rotational (rolling) device at the beginning of the molding part so that there is no slip friction between the product and the molding frame during the molding process, so that the indented contents can be formed at right angle corners without damage due to rotational (rolling) friction. It was made.

Another object is to provide a square metal container having an edge manufactured by the drawing molding apparatus.

Drawing molding machine of a rectangular metal container with a right angled corner of the present invention for achieving the above object, the forming die of the assembly die coupled to the fixed die and the assembly groove provided in the fixed die and fixed to the above-mentioned base body The pinhole is formed in the middle of the curved surface formed on the upper surface of the upper surface of the pinhole, and the metal pin rollers are installed to be idle in each of the pinholes so that the upper part of the pin roller is exposed to the upper pinhole, Metal pin rollers in a rectangular shape are combined to form a rectangular forming hole, and an unfinished rectangular metal container formed by the conventional drawing method in the rectangular forming hole by the metal pin roller is installed in the rectangular forming hole. The corner right angle of the square metal container that is molded by right angle without being damaged by each corner It is characterized by a rectangular metal container having a right angle corner produced by the device and the molding device.

In addition, the present invention forms both ends of the metal pin roller to be installed in the pin hole of the fixed die and the assembly die in a conical shape having a 45-degree surface so that each metal pin roller has the same rotational force, holding each other length It is characterized by suppressing the flow in the direction.

According to the present invention, the metal pin rollers are idled on the four curved surfaces formed on the upper side of the forming hole of the mold, and the four metal pin rollers are combined to form a rectangular molding hole. Since the product is stretched and drawn smoothly by rolling friction due to the rotation (rolling) operation of the metal pin roller, each corner is molded into a finished product with a right angle without fear of cracking.

In addition, since the square metal container molded according to the present invention is formed in each corner 90 degrees, the outer surface of the electrical or electronic assembly parts are accommodated tightly on the inner surface of the square metal container, the storage stability is not only good but also the square metal container It is possible to form a small volume and to contribute to miniaturization of the main body of the electrical and electronic products.

1 is a perspective view of a conventional square metal container each corner is formed in a curved arc surface.
Figure 2 is a longitudinal cross-sectional view showing a form containing the assembly parts in the square metal container of Figure 1;
Figure 3 is a cross-sectional view showing a form containing the assembly parts in the square metal container of Figure 1;
Figure 4 is a longitudinal sectional view of a drawing molding machine for molding a conventional rectangular metal container.
Figure 5 is an exemplary view showing a sequence of conventional rectangular metal container forming process sequentially.
Figure 6 is a development of a conventional square metal container produced by welding the corners.
7 is a perspective view of the square metal container of FIG.
8 is a perspective view of a square metal container having a right angled corner produced by the present invention.
9 is an exemplary view showing the contents storage state of the square metal container of the present invention.
Figure 10 is an exploded perspective view of the main portion of the right angle corner forming apparatus of the present invention.
11 is an overall configuration diagram of the present invention drawing molding apparatus.
12 is a plan sectional view showing a main portion of the mold apparatus of the present invention.
Figure 13 is a state diagram immediately before the final drawing processing of the unfinished product of the present invention
14 is an initial state in which the rectangular molding is started in the state of FIG.
15 is a state in which the right angle molding of the lower end of the product in the state of FIG.
16 is a perspective view of one embodiment of a metal pin roller for use in a molding machine.

The present invention relates to a drawing molding apparatus of a square metal container for stably and without hexahedron-shaped assembly parts installed in a main body of an electric or electronic device, and a rectangular metal container having a right angled edge formed by the molding device. As such, the present invention will be described with reference to FIGS. 8 to 16 as follows.

In the drawing molding machine 400 of the present invention, the four molds of the front, rear, left, and right sides are assembled to form an assembly mold having a rectangular molding hole in the center.

The assembly mold is a symmetrical fixed die (410, 420) of the arrangement of the front and rear to the table of the body, and the assembly die 430, 440 of the assembly die arranged on the left and right of these fixed die (410, 420) It consists of a combination.

Vertical assembly grooves 414 and 424 are formed in opposite directions on both sides of the central portion of the body inner surface of the front and rear fixing dies 410 and 420, and symmetrical assembly dies are formed in the vertical assembly grooves 414 and 424. 430 and 440 are vertically inserted to form a rectangular mold frame having a rectangular molding hole in the center.

That is, the fixed dies 410 and 420 and the assembly dies 430 and 440 are assembled in a lattice shape, so that the square forming holes 502 are formed in the middle of their bodies. It is used as a molding surface.

The upper ends of the square forming holes 502 of the assembly are each formed with a curved surface, and the pinholes 413, 423, 433, 443 are drilled in the horizontal direction in the middle of the curved surface, and the respective pinholes ( 413, 423, 433, and 443, the metal pin rollers 450 are loosely inserted to facilitate rotation in place, and as shown in FIG. 12, the four dies are lattice-shaped with the metal pin rollers inserted in the respective pinholes. To be assembled.

The pinholes 413, 423 and 433 and 443 are set so that a 45-degree portion of the body of the pin roller 450 inserted therein is drawn out to the outside of the hole as a part of the front surface is opened. As shown in FIG. 14, when the molding object is pressed into the punch 510 and downwardly pressed into the square molding hole 502, the molding object first contacts the lead portion of the pin roller 450 so that rotational friction (rolling friction) action occurs. It is made up.

In addition, as shown in FIG. 11, the square forming hole 502 is provided with a base 512 receiving upward elasticity of the spring 511, and the top of the base is substantially coincident with the upper surface of the forming hole.

Drawing a molding machine 400 of the present invention as described above to form a square metal container 600 of each corner at right angles, using a different molding mold as in the conventional drawing molding process shown in Figure 5, primary, It is the same as the conventional molding method until the second, third, and fourth process are performed sequentially to form an unfinished square container. (In the past, the rectangular container having curved corners was completed only after the sixth process.)

Thus, the unfinished square container (T4) proceeded to the fourth step is finally formed by molding with a molding machine of the present invention, first, the unfinished square container (T4) is loosely inserted into the lower end of the punch 510 as shown in FIG. When the punch is driven in, as shown in FIG. 14, the punch is lowered together with the unfinished square container T4, and the metal pin roller 450 in which the lower end of the descending unfinished square container T4 is disposed in a rectangle on the upper part of the forming hole. ) And the rectangular molding is initiated.

In this process, the outer diameter of the unfinished square container (T4) is wider than the space of the forming hole (square forming hole formed by connecting four pin rollers in a square), so that the unfinished square container is in contact with the metal pin roller 450 and downward. Under pressure, the pin roller immediately rotates in the pressing direction. In addition, as the pin roller on the slope rotates, the unfinished square container smoothly passes through the rotary forming part by the downward rotation friction action as shown in FIG. 15, and the unfinished square container passing through the rotary forming part is molded closely to the outer surface of the punch and has a rectangular corner. It is molded into a container to obtain a finished product. In addition, as needed, punching the wiring hole in the bottom of the container is used as a separate process.

As described above, the molding apparatus of the present invention improves the conventional slip friction to rotation (rolling) friction to realize the formation of a right angle corner without cracking or damage, and the contact portion between the unfinished square container and the pin roller by the rotation of the pin roller. Because the smooth rotational friction acts, even if the edge is pressed at right angles, it is molded without cracking or damage.

In addition, Figure 16 is another embodiment for achieving the object of the present invention, when forming both ends of the metal pin roller 450 in a conical shape to be loaded in the pin hole of the fixed die and the assembly die idle all-round metal pin roller 450 Since the end rollers are arranged in contact with each other at an angle of 90 degrees, the pin rollers can not be held in a lengthwise direction, but each is easily rotated in place. This can be useful for.

The finished square metal container 600 molded by the drawing molding apparatus of the present invention is formed by the corner is formed at right angles, the muddy 602 formed perpendicular to the quadrilateral of the bottom 601 is integrally formed, the muddy 602 ) And other edges of the head 602 and the head 601 and the bottom 601 are formed at right angled corners 603 and 604 of 90 degrees, so that the contents are not tight when used as a container for assembly parts (P) in various industrial fields. The storage volume is very high, and the stability of the storage is very high. As the gap of the storage part is omitted, the volume of the square metal container is molded small so that it can be useful for electric appliances or portable telephones. Can be.

410, 420 ... fixed die
413, 423, 433, 443 ..... pinhole
414, 424 .... Vertical Groove
430, 440 .... assembly die
450 ..... metal pin roller
502 ..... square forming hole
510 ..... punch
512 ..... bass
600 ..... square metal container
603, 604 ..... Right corner

Claims (4)

As a molding apparatus for drawing and processing a metal rectangular container,
A punch installed to be driven in a vertical direction on an upper portion of the support of the molding machine;
A front and rear fixed die having a curved surface formed at an upper portion of the inner surface of the body and having vertical assembly grooves at both sides of the center;
An assembly die having a curved surface formed on an inner surface of the front and rear fixed dies by being inserted into a vertical assembly groove and coupled in a lattice shape;
A pinhole formed horizontally in the middle of the curved surface of the fixed die and the assembly die and having a front portion open;
A metal pin roller inserted into each pin hole formed in the fixed die and the assembly die to facilitate idling;
An assembly die vertically coupled to the vertical assembly groove and formed into a rectangular hole in a vertical direction, the square forming hole having an internal angle at right angles;
A base elastically installed in the square forming hole; Drawing forming apparatus of a rectangular metal container with a right angled edge, characterized in that the drawing is made at a right angle using the rotational friction of the pin roller roller of the unfinished square metal container.
The method according to claim 1,
The pin holes formed in the fixed die and the assembly die are formed so that the front part is opened so that the 45 degree portion of the pin roller body fitted in the pin hole is installed to be drawn out of the hole. .
The method according to claim 1,
Drawing molding apparatus for a rectangular metal container having a right angled corner, characterized in that the conical shape of both ends of the metal pin roller is easily installed idle in the pin hole.
Square metal container according to claim 1, wherein the rectangular metal container formed by the drawing molding apparatus, the bottom corner and the vertical corner are formed in an integral right angle corner of the square metal container.

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