KR102617355B1 - Metal container drawing device and method thereof - Google Patents

Abstract

The present invention discloses a metal container drawing and forming apparatus. The molding device of the present invention includes a first bending die having a flat bottom surface and a first molding groove in a shape in which two surfaces facing from the bottom surface expand upward, and a first bending die having a bottom shape corresponding to the first molding groove. A first molding unit including 1 punch; A second forming part including a second bending die having a second forming groove on which the two opposing surfaces extend upward at an angle narrower than the first forming groove, and a second punch having a bottom shape corresponding to the second forming groove. ; a final forming unit including a final bending die having a final forming groove so that the two opposing surfaces are vertical or close to vertical, and a final punch having a shape corresponding to the final forming groove; a drawing die selectively installed in close contact with each side of the first bending die, the second bending die, and the final bending die; And a stripper that is selectively installed on both sides of the first punch, the second punch, and the final punch, and descends with the punch to contact the drawing die and elastically press both sides of the metal material; It is characterized by including.

Description

Metal container drawing device and method thereof}

The present invention relates to a drawing forming apparatus and method for manufacturing a seamless metal container. More specifically, the present invention relates to a drawing forming apparatus and method for manufacturing a seamless metal container. More specifically, it is possible to simply form a metal container by sequentially processing the material in the vertical direction and using minimal punching. Of course, in particular, it relates to a multi-stage drawing forming apparatus and method that can easily form a square metal container and form a metal container with a dense and stable structure without deformation or damage to the edges of the formed container.

As you know, drawing processing is a type of plastic processing that stretches a plate-shaped metal material using a mold and presses it into a desired shape such as a cylinder, square cylinder, or hemisphere, forming a seamless container-shaped product. It is mainly used to

Die drawing using a die and a punch press is common for this drawing process, and deep drawing is used when forming containers with deep grooves.

Due to the nature of deep drawing processing, the contact time between the material and the mold is long, and as a result, the degree of side effects due to friction is large. Therefore, for easy processing, the friction between the punch and the die must be low, and deep drawing processing is performed by forcibly injecting lubricant into the die surface and the punch surface. For this reason, deep drawing processing has the disadvantage of requiring lubricant consumption.

Meanwhile, metal containers formed through drawing processing are widely used in various industrial fields such as various kitchen utensils, beverage cans, and small electrical and electronic component cases due to the advantage of having no joints. They are generally cylindrical containers and square cylinders. Containers are mainly used.

In the case of general household items such as kitchen utensils or beverage cans, the shape precision of the container produced by drawing is not greatly affected, but in the case of small electrical and electronic component cases, for example, the shape of the container formed by drawing is not affected. Precision is very important.

In other words, for stable storage, it is important that electrical, electronic components, and battery cases exactly match the outer shape and size of the components to be stored so that the components are stored without gaps, and furthermore, it increases the stability and compactness of products using the components. Since it also affects the shape accuracy of drawing processing, it is inevitable that it will be sensitive to the shape precision of the drawing process.

The general drawing forming method used conventionally is a forming method in which several molds with different forming depths are sequentially placed and the depth is gradually increased while transferring the metal material from a low-depth mold to a gradually deeper mold. is taking.

This is a technology that utilizes the slip friction action of forcing a metal material into the molding hole of the die with a punch and elongating it. When forming a metal container with a single operation of the punch, the metal material is damaged, so the depth of the molding hole must be adjusted. The desired metal container is completed by sequentially performing several molding processes using several different molds.

However, in this conventional drawing forming method, forced sliding friction occurs between the metal material and the forming hole by the punch, and the resulting rapid deformation of the material occurs. For example, when forming a rectangular container such as a square, the edge is not formed even if it is formed through several processes. Serious damage problems such as cracks, tears, or bursts may occur on the sides.

For this reason, the corners of rectangular containers made with conventional drawing and forming equipment are not formed at right angles but take an arc shape. As a result, when storing electrical and electronic components, a gap is created between the metal container and the components, making stable storage difficult. In addition, since the volume of the square metal container is molded to be as large as the gap, it is bound to have a negative effect on the size of the product using it.

Therefore, there is a continuous need for research on drawing devices and methods that can form stable, high-quality metal containers while saving cost and time by simplifying the process.

1. Korean registered patent 10-1301154

The present invention was created to solve the above-described conventional problems. By sequentially processing metal materials in the vertical direction and gradually forming side surfaces with narrow angles from wide angle sides with respect to a certain bottom surface, large deformation or damage to the metal material can occur. The purpose is to provide a metal container drawing and forming apparatus and method that can stably form square-shaped containers without using the same.

Another object of the present invention is to provide a drawing forming apparatus and method for a metal container that can form a metal container in a minimum number of steps, thereby significantly reducing equipment, costs, and time by minimizing the forming process.

Another object of the present invention is to ensure that the bottom corner of the metal container is formed at a right angle by consistently bending and forming the bottom corner of the metal container from the first stage to the final stage, and by minimizing bending forming on other side parts. The object is to provide a metal container drawing and forming apparatus and method that can supply a metal container with a stable structure.

Another object of the present invention is to provide a metal container drawing and forming device that can reliably form the edges of a metal container at a right angle without cracks or damage by minimizing frictional resistance during molding by allowing the metal material to be smoothly formed by rolling friction. It provides a method.

The metal container drawing and forming apparatus according to the present invention for achieving these purposes includes a first bending die having a flat bottom surface and a first forming groove having a shape in which two surfaces facing the bottom surface expand upward, and A first molding portion including a first punch with a bottom shape corresponding to the molding groove; A second forming part including a second bending die having a second forming groove on which the two opposing surfaces extend upward at an angle narrower than the first forming groove, and a second punch having a bottom shape corresponding to the second forming groove. ; a final forming unit including a final bending die having a final forming groove so that the two opposing surfaces are vertical or close to vertical, and a final punch having a shape corresponding to the final forming groove; a drawing die selectively installed in close contact with each side of the first bending die, the second bending die, and the final bending die; and a stripper that is selectively installed on both sides of the first punch, the second punch, and the final punch, and descends with the punch to contact the drawing die and elastically press both sides of the metal material. It has features including.

In the present invention, one or more forming parts including a bending die, a punch, and a drawing die are further formed between the second forming part and the final forming part, and the bending die of each forming part is gradually narrower than the second forming part. A molding groove is formed, and each punch can also be configured with a bottom shape at a corresponding angle.

Another feature of the present invention is that the drawing die is fixed in each forming part, and an elastic member is installed at the bottom of each bending die to elastically support each bending die, so that when the punch is pressed, each bending die is affected by the elastic force of the elastic member. It is configured to descend to the lower side for a certain section against.

In the present invention, the inner upper edge of the drawing die may be configured to have a curved bent portion formed so that the side of the metal material is bent and formed in contact with the bent portion.

Another feature of the present invention is that in each forming part excluding the final forming part, a drawing groove having the same angle as the forming groove of each bending die in close contact with the drawing die is formed, and the stripper is formed in the drawing groove of the facing drawing die. It is configured to have the same bottom shape as.

In the present invention, a pad hole is formed on the bottom surface of each molding groove formed in each bending die and a pad is installed, and each pad may be configured to be supported by a pad elastic support from the lower side.

In the present invention, the forming groove of the final bending die installed in the final forming part among each forming part has an inclined surface at an angle close to a right angle, and forming holes connected to a curved surface from each side of the forming groove are formed on the bottom. It can be.

A final molding die may be further installed below the bending die of the final molding part, and a molding discharge hole is formed in the final molding die continuously penetrating the molding hole, and the molding discharge hole is continuous with the inclination angle of the molding hole and gradually narrows. It can be formed continuously as an entry part, a vertical part forming a vertical surface, and an outlet part gradually expanding downward.

Another feature of the present invention is that a pair of parallel bending rollers are installed on the upper side of each bending die to be movable in a direction perpendicular to the roller axis, and each bending roller is elasticated inward by the roller elastic support, so that the punch is It is lowered by pushing a pair of banding rollers outward.

Another feature of the present invention is that it consists of a rolling type bending die in which forming is performed according to the angle of the applied punch while the bending die is rotated to face each other and comes into close contact with the punch at each stage.

A pressing die may be further provided to push each outer surface of the rolling bending die so that the rolling bending die is pressed against the outer surface of the punch.

The pressing die may be configured to perform horizontal movement in conjunction with the vertical movement of the push bar that descends along with the lowering of the punch.

The rolling type bending die may be configured in the form of a pair of facing cams so that the surface in contact with the punch is a surface in close contact with the punch.

The present invention is a drawing forming method, comprising: a first bending die having a first forming groove whose front and rear surfaces are expanded upward with respect to the bottom; and a first drawing die having a first drawing groove having the same shape as the first forming groove. In the first forming part installed on both sides of the first bending die, a metal material is placed on the upper side of the first bending die and the first drawing die, and a punch of a shape corresponding to the first forming groove is lowered to place the metal material. Pressing, the first bending die is lowered along with the punch in a certain section, forming the front and back sides of the metal material into the shape of the first forming groove, and at the same time, both sides of the metal material are formed by the inner edges of each first drawing die. A first forming step of first forming while bending; A second bending die having a second forming groove that extends upward at an angle narrower than the first forming groove, and a second drawing die having a second drawing groove having the same shape as the second forming groove are the amount of the second bending die. In the second forming part installed on the side, the metal material that has been primarily formed is placed, a second punch having a shape corresponding to the second forming groove is lowered to pressurize the metal material, and the second bending die is connected to the punch in a certain section. The second molding is performed by descending together so that the front and back sides of the metal material are formed more narrowly in the shape of the second forming groove, and at the same time, both sides of the metal material are bent and molded more narrowly by the inner corners of each second drawing die. forming step; In the final forming section where a final bending die having a final forming groove formed at an angle perpendicular to the front, rear, and side surfaces with respect to the bottom is installed, the metal material that has been secondarily formed is placed, and a shape corresponding to the final forming groove is placed. A final forming step of lowering the final punch and pressurizing the metal material to finally form the square container; It has features including.

In the method of the present invention, between the second forming step and the final forming step, a bending die having a forming groove and a drawing groove that are gradually narrower than the second forming groove in the second forming step, a drawing die, and a corresponding punch are provided. One or more molding steps provided may be further performed.

According to the method of the present invention, the first forming part to the final forming part can use the bending die, drawing die, punch, and stripper respectively at one location.

According to one method of the present invention, a pair of bending rollers parallel to the upper side of each bending die are installed to elastically face each other in the molding portion immediately before the final molding portion from the second molding portion, and the metal material is placed on the bending roller. By placing it on the upper side and lowering the punch, the metal material is lowered by the punch and the outer surface can be stably bent through strong rolling contact with the bending roller.

In the method of the present invention, an ironing step in which the metal material discharged from the final forming part is passed through an ionizing die may be further performed.

The banding die in the present invention is rotated facing each other so that it can be applied as a rolling type bending die in which forming is performed according to the angle of the punch while being in close contact with the punch at each stage, and this rolling type bending die can be applied to each forming part at the same time without replacement. By applying this method, the bending process of each molded part can be performed using a single rolling bending die.

According to the metal container drawing forming apparatus and method according to the present invention, forming grooves are sequentially formed at narrow front and rear angles with respect to the bottom surface of the bending die, and metal materials are sequentially formed using punches corresponding to the shape of the forming grooves. Pressure molding provides the effect of stably forming a square-shaped container without significant deformation or damage to the metal material.

The present invention provides the effect of significantly saving equipment, costs, and time by minimizing the molding process because metal containers can be formed in minimal steps.

The present invention applies a method of gradually narrowing the angles of the front and back while keeping the bottom of the bending die constant, so that the bottom edge of the metal container is consistently bent and formed from the first to the final stage. The corners can be reliably formed at right angles, and deformation on other side surfaces can be minimized, providing the effect of supplying high-quality metal containers with a stable structure.

The present invention installs a pair of bending rollers that face each other elastically on the upper side of the bending die, so that the metal material passing between the bending rollers is smoothly formed by rolling friction, thereby minimizing frictional resistance during forming and forming a metal container. It also provides the effect of being able to reliably mold the edges to a right angle without cracks or damage.

1 is a perspective view of a die portion of a molding device according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of the main portion of Figure 1.
Figure 3 is a schematic perspective view showing another embodiment of the molding device according to the present invention.
Figure 4 is a cross-sectional view briefly showing an example of the final molding part according to the present invention.
Figures 5a to 5c are diagrams showing the interaction state between the die and the punch according to the present invention.
Figure 6 is a diagram showing a state of deformation of a metal material by the first forming part of the present invention.
Figures 7a to 7e are schematic cross-sectional views showing the operating state of the present invention by process.
Figure 8 is a plan view and a cross-sectional view showing an embodiment of the stripper according to the present invention.
Figure 9 is a cross-sectional view showing the operating state of Figure 8.
Figure 10 is a perspective view showing another embodiment of the stripper according to the present invention.
Figure 11 is an example of a deformed state of a metal material according to the present invention.
Figure 12 is a flow chart of the deformation state of the metal material according to the present invention.
Figure 13 is a lateral deformation state diagram of a metal material according to the present invention.
Figure 14 is a perspective view exemplarily showing a deformed state of a metal material according to the present invention.
Figure 15 is a schematic perspective view of a die portion showing another embodiment of the present invention.
Figures 16 and 17 are schematic cross-sectional views showing the operating state of the molding apparatus according to Figure 15.
Figure 18 is a schematic side view showing another embodiment of the present invention.
Figure 19 is a schematic side view showing another embodiment of the present invention.
Figure 20 is a drawing process diagram of Figure 19.
21 to 23 show another embodiment of the present invention.

The specific contents of the present invention will be described in detail with reference to the accompanying drawings as an embodiment as follows. In this process, the thickness of lines or the size of components shown in the drawing may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

The present invention is capable of molding all rectangular metal containers. In the examples below, the description will be made assuming that a square metal container is molded, and the same symbols are applied to the same parts in the drawings.

The metal container drawing forming apparatus according to the present invention constitutes several stages of forming parts from the first forming part to the final forming part, and, if necessary, one or two or more forming stages can be applied between the first forming part and the final forming part. Each forming part includes a bending die and a punch, and may be provided with a drawing die as needed.

Figures 1 and 2 show the molding device in the first molding section according to the present invention as an example, Figure 1 is a perspective view of the die portion of the molding device according to an embodiment of the present invention, and Figure 2 is an exploded perspective view thereof. Referring to this, the first forming part 100 of the present invention includes a first bending die 110, a first drawing die 120, and a first punch 130.

The first bending die 110 is installed to be lifted up and down, and an elastic member 113 is installed at the lower part to elastically support the first bending die 110, so that when the first punch 130 is pressed, The first bending die 110 is lowered downward for a certain period against the elastic force of the elastic member 113.

The elastic member 113 may be a spring or a cylinder-type shock absorber.

The first bending die 110 is open on the side and the facing front and rear surfaces are made of inclined surfaces, so that a 'V' shaped first forming groove 111 that is expanded upward is formed.

A pad hole 112 is formed on the bottom of the first forming groove 111 to allow the pad 115 to pass up and down, and the pad 115 is supported by the pad elastic support 116 from the lower side.

The pad elastic support 116 may be a spring or a cylinder-shaped shock absorber, and elastically supports the pad 115 upward.

The pad 115 is elastically biased upward to continuously support the metal material from the lower side with respect to the punch 130, and can function to extract the molded metal material from the forming groove.

The first drawing die 120 is installed in close contact with both sides of the first bending die 110.

The first drawing die 120 is fixedly installed, unlike the first bending die 110 that is lifted and lowered.

A first drawing groove 121 of the same shape as the first forming groove 111 of the first bending die 110 is formed in the first drawing die 120, so that the first bending die 110 is formed in a state in which it is not lowered. ) is continuous from the side with the first forming groove 111 of ).

The first bending die 110 and the first drawing die 120 are supported by the guide block 10 at the front and rear, and are supported by the support block 20 on the outside of the first drawing die 120.

The front and rear upper edges of the first bending die 110 and the first drawing die 120 are curved to induce smooth bending of the metal material. In particular, the inner upper edge of the first drawing die 120 is curved. A bent portion 122 is formed so that the side surface of the metal material contacts the bent portion 122 to be bent and formed.

The first punch 130 faces and corresponds to the upper side of the first bending die 110, and the bottom shape of the first punch 130 is the same as the first forming groove 111 of the facing first bending die 110. It is made up of shapes.

A first stripper 140 may be installed on both sides of the first punch 130 as shown in Figure 3. The first stripper 140 corresponds to the upper side of the first drawing die 120, and the first stripper ( The bottom shape of 140 is configured to be the same as the shape of the first drawing groove 121 formed in the first drawing die 120.

The first punch 130 and the first stripper 140 descend together and come into contact with the first bending die 110 and the first drawing die 120, and the first punch 130 and the first bending die 110 ) is further lowered in a certain section, and the first stripper 140 comes to a stop in conjunction with the first drawing groove 121 of the first drawing die 120.

The first stripper 140 presses the metal material located in the first drawing groove 121. An elastic pressing member 141 is connected to the first stripper 140 to elastically press the metal material, The metal material is bent as both side ends are pressed by the first stripper 140 and the side passes between the first drawing die 120 and the first stripper 140 along with the lowering of the first bending die 110. It is molded.

As described above, the configuration of the first molding section 100 has been described, and each molding section that reaches all stages of the final molding section, such as the second molding section and the third molding section, has the same configuration as the first molding section 100. It is made up of elements.

However, the second forming groove and the second drawing groove of the second bending die and the second drawing die in the second forming part are set at a narrower angle than the forming groove and the drawing groove in the first forming part, and the third forming part The third forming groove and the third drawing groove in are set at a narrower angle than the second forming part, and the forming groove and drawing groove are gradually narrowed to become closer to vertical.

In this way, in the forming step according to the present invention, one or more forming parts can be selectively applied between the first forming part and the final forming part, and more stages of precise drawing forming work can be performed.

Additionally, the drawing die and stripper may be selectively installed or removed from the first forming part to the final forming part as needed.

And in the final forming part, a metal container product with vertical surfaces on all sides is formed. A drawing die may be installed in the final forming part 400, but it is preferable to form a square forming groove only with a bending die.

Figure 4 is a cross-sectional view briefly showing an example of the final forming part. Referring to this, the final forming part 400 is composed of a final bending die 410 and a final forming die 450.

The final bending die 410 forms a final forming groove 411 that is narrower or has the same angle as the forming groove formed in the bending die in the previous forming part. That is, the front, rear, left, and right sides of the final forming groove 411 are formed with inclined surfaces that are close to vertical.

A molding hole 412 is formed through the bottom of the final molding groove 411, and the final molding groove 411 and the molding hole 412 are connected by a curved surface.

The forming hole 412 may be formed vertically, but it is preferable to have an inclination closer to vertical than the final forming groove 411.

The final bending die 410 is fixedly installed, and a final forming die 450 is further installed below it.

The final molding die 450 is formed with a molding discharge hole 451 that continuously penetrates the molding hole 412, and the molding discharge hole 451 is a gradually narrowing entry portion ( It is continuously formed by 451a), a vertical part 451b forming a vertical surface, and a discharge part 451c that gradually expands downward.

The embodiment of the present invention configured as described above can be drawn and formed through the following process.

A first bending die having a first forming groove whose front and rear surfaces are expanded upward with respect to the bottom, and a first drawing die having a first drawing groove having the same shape as the first forming groove are the amount of the first bending die. In the first forming part installed on the side, a metal material is placed on the upper side of the first bending die and the first drawing die, a punch of a shape corresponding to the first forming groove is lowered to press the metal material, and the first bending die is By descending with the punch in a certain section downward, the front and back sides of the metal material are formed into the shape of the first forming groove, and at the same time, both sides of the metal material are bent by the inner corners of each first drawing die to perform primary forming. forming step; A second bending die having a second forming groove that extends upward at an angle narrower than the first forming groove, and a second drawing die having a second drawing groove having the same shape as the second forming groove are the amount of the second bending die. In the second forming part installed on the side, the metal material that has been primarily formed is placed, a second punch having a shape corresponding to the second forming groove is lowered to pressurize the metal material, and the second bending die is connected to the punch in a certain section. The second molding is performed by descending together so that the front and back sides of the metal material are formed more narrowly in the shape of the second forming groove, and at the same time, both sides of the metal material are bent and molded more narrowly by the inner corners of each second drawing die. forming step; In the final forming section where a final bending die having a final forming groove formed at an angle perpendicular to the front, rear, and side surfaces with respect to the bottom is installed, the metal material that has been secondarily formed is placed, and a shape corresponding to the final forming groove is placed. A final forming step of lowering the final punch and pressurizing the metal material to finally form the square container; Molding of the metal container is performed, including.

In the above process, three steps were exemplified: the first forming step, the second forming step, and the final forming step, but this step process can be applied by adding or subtracting steps as necessary.

That is, one or more molding steps can be added between the second molding step and the final molding step, and the molding groove is set to gradually become narrower with each step.

The operation in the first forming step performed in the first forming unit 100 during the process of the multi-stage drawing forming method of the present invention will be examined in detail with reference to FIGS. 5A to 5C.

Figures 5A to 5C are diagrams showing the interaction between the die and the punch according to the present invention, showing the interaction between the die and the punch in the first forming part.

Angle (a) in FIGS. 5A, 5B, and 5C is a cross-sectional view showing the state in which the metal material is formed in the 'v' shaped forming groove of the bending die, and angle (b) in each figure is a cross-sectional state in the right angle direction. is shown schematically.

First, Figure 5a shows a state in which a plate-shaped metal material (B) is placed and the first punch 130 and the first stripper 140 descend and come into contact with the metal material (B). Here, the pad 115 elastically supports the bottom of the metal material (B), and together with the first punch 130, clamps the metal material (B) from the upper and lower sides.

The first punch 130 and the first stripper 140 further descend and enter the forming groove as shown in FIG. 5b, and the metal material (B) is pushed together and formed into the shape of the forming groove and the drawing groove. Here, the pad 115 elastically supports the bottom surface of the metal material B to maintain a flat surface.

As shown in Figure 5c, the first stripper 140 is engaged with the first drawing die 120 and fixed, and the first punch 130 continues to lower, lowering the first bending die 110 together, and the first punch 130 continues to descend. The side end of the metal material (B) pressed against the first stripper 140 on the upper surface of the first drawing die 120 is lowered together with the first bending die 110, and the inner bent portion 122 of the first drawing die 120 is lowered. ) and the side is formed by bending.

Here, since the upper ends of both sides of the metal material (B) are elastically pressed by the first stripper 140, bending can be achieved while maintaining a stable shape.

By this method, the forming of the first forming part 100 is completed, the first punch 130 and the first bending die 110, etc. are raised, and the first formed metal material (B) is taken out.

Figure 6 shows a molded example of the metal material (B) that is first formed by drawing forming in the first forming part. In this way, the metal material (B) is bent into a 'v' shape as much as the angle of the first bending die. The side shows some form of molding.

That is, Figure 6(a) is a form bent and molded into a 'v' shape by compression with the bending die due to the lowering of the punch, and Figure 6(b) shows the side bending due to friction with the drawing die due to the lowering of the bending die. It shows the form in which this is formed.

The metal material thus first formed is then subjected to the second forming part and subsequent processes in the same manner as above.

Figures 7a to 7e show the relationship between the banding die, the punch, and the metal material (B) for each process, and each (a) in Figures 7a, 7b, and 7c represents the metal in the 'v' shaped forming groove of the bending die. It is a cross-sectional view showing the state in which the material is molded, and angle (b) in each drawing schematically shows the cross-sectional state in the right angle direction.

Figure 7a shows the first forming part 100 forming the first forming step, including the first forming groove 111 formed in the first bending die 110 and the first drawing groove 121 of the first drawing die 120. And forming is performed at a relatively wide angle by the first punch 130 and the first stripper 140.

Figure 7b shows the second forming part 200 forming the second forming step, where the metal material (B), which has been initially formed in the first forming part 100, is formed into the second bending die 210 and the second drawing die 220. ) into the second forming groove 211 and the second drawing groove 221 and forming it at a narrower angle using the second punch 230.

In the present invention, a drawing groove is formed in the drawing die, which is selectively applied from the first forming stage to the previous stage of the final forming stage, and the side of the metal material (B) is formed by a punch, and the outer side of the metal material (B) is formed through the drawing groove. It contacts the support block (20).

At this time, a guide groove 21 is formed from the inner top of the support block 20 as shown in (b) and (c) of Figure 7b so that the side end of the metal material (B) can be guided downward more smoothly. can do.

Figure 7c shows the third forming part 300 forming the third forming step, and the metal material (B) formed in the second forming part 200 is placed in the third forming groove 311 of the third bending die 310. and is molded at a narrower angle by the third punch 330.

Figure 7d shows the final forming part 400 forming the final forming step. The metal material (B), whose side is sufficiently narrow in the third forming part 300, is placed into the final forming groove 411 of the final bending die 410. Punching is performed using the final punch 430.

The final bending die 410 is fixed without being lifted, and the final forming groove 411 is made of a forming groove at the same angle as the third forming groove 311 or a forming groove close to vertical, A penetrating molding hole 412 is formed on the lower side of the final molding groove 411.

However, the final punch 430 has a vertical side without an inclined surface, and when punching is performed, the metal material (B) passes downward through the square-shaped forming hole 412, taking the shape of a square container. do.

And, as it passes through the molding outlet 451 of the final molding die 450 installed below the final bending die 410, a square container is finally formed and ejected.

The molding outlet 451 is continuous with the molding hole 412 and consists of an upper gradually narrowing entry part 451a, a vertical part 451b, and a gradually widening discharge part 451c, and the molding hole ( The metal material (B) that has passed through 412) is guided by the entry portion (451a), secures the shape of a square container again while passing through the vertical portion (451b), and is then taken out downward through the discharge portion (451c).

Here, the final bending die 410 and the final forming die 450 may be integrated without distinction, or may be processed only with the final bending die 410 or with the final forming die 450. In this case, the final forming groove 411 ) can be applied as the entry part of the molding discharge port 451.

This step process can be applied by adding or subtracting steps as needed.

The square metal container product formed through this process may further undergo an ironing step as shown in Figure 7e to secure more precise surface conditions and specifications.

The ioning step is performed by passing an iron block 460 that has the same shape as the final forming die 450 but has a more precise ioning groove 461.

In other words, by passing the product once more into the shape of a square container, it is finished in a neat condition, as if ironing.

In this process, the sides of the metal material become thinner and are stretched to a set height.

Products molded into metal containers are manufactured into precise containers by cutting and finishing the upper part, and the cutting work can be done in the latter half of the molding stage and in the stage after ironing.

Figure 8 shows an example of a stripper according to the present invention, (a) is a schematic plan view, and (b) is a cross-sectional view, which is assumed to be applied to the second forming step of the present invention.

Unlike the stripper 140 that presses the side of the metal material as in the first forming step in FIGS. 5 and 7A, from the second forming step, the outer surface is inclined so that the side of the metal material (B) can be smoothly guided. Alternatively, it is preferable that the sleeve stripper 145 made of a curved surface is applied.

Therefore, as shown in FIG. 8, the sleeve stripper 145 whose outer surface has an inclined surface is applied. The sleeve stripper 145 descends with the punch 230 from both sides of the punch 230, and the outer surface is formed by a drawing die ( 220), and elastically supports the side of the metal material (B).

In this state, as shown in FIG. 9, when the sleeve stripper 145 stops and the punch 230 and pad 115 further descend together with the metal material (B), the side of the metal material (B) is drawn by the drawing die (220). ) is guided in close contact between the upper surface and the outer surface of the sleeve stripper 145 and then descends to gradually form the side of the square container.

This sleeve stripper 145 is designed so that the slope of the outer surface gradually narrows as the stages progress.

Figure 10 is a perspective view showing another embodiment of the stripper. Referring to this, unlike Figures 8 and 9, which are installed separately on both sides of the punch, the sleeve stripper 146 is formed integrally and is located in the center. A punch groove 147 through which the punch P can pass is formed, and the outer surface is made of a gradually narrowing inclined surface or inclined curved surface.

This integrated sleeve stripper 146 is installed to surround the outside of the punch (P), and is mainly applied in the latter part of the forming stage.

For example, when a metal material with the front, back, and both sides erected to some extent after several stages of forming is inserted into the banding die and the drawing die and the punch (P) is lowered, the punch (P) and the sleeve stripper (146) are together. While descending, the entire inner surface of the metal material (B) is in close contact with the outer surface of the integrated sleeve stripper (146), and while the sleeve stripper (146) is in close contact with the drawing die and stopped, the punch (P) passes through the punch groove (147). If the metal material (B) continues to be lowered and pushed down, the metal material (B) is guided in close contact with the outer surface of the sleeve stripper 146 and is formed into the shape of a container.

This integrated sleeve stripper 146 is preferably applied in the final forming stage or a late forming stage close thereto, and then goes through an ioning stage, etc.

Figure 11 simultaneously shows the deformation state of the metal material (B) by the process in Figures 7a to 7e above, and it can be seen that the metal material (B) is formed as the angle gradually narrows.

That is, (a) is the first banding completed, (b) is the second banding completed, (c) is the third banding completed, (d) is the final banding completed, (e) ) indicates that the ioning work has been completed.

In addition, (a) to (e) in Figure 12 show sequentially separated deformation state diagrams for each process of the metal material molded according to the present invention, and the metal material (B) is formed according to the multi-step process as shown in Figure 7 above. It shows the state of transformation separately.

In addition, Figure 13 sequentially shows the state in which the side shape of the metal material (B) is deformed, from (a), which exemplarily shows the developed form, to (b), which is formed by the first drawing die, and the subsequent processes. You can see the state in which the side is molded.

In Figure 13 (a) is the unfolded state of the metal material (B), where the imaginary line (B1) is the part that forms the bottom of the final formed square container, and the imaginary line (B2) is on the side to be bent by the drawing die. It applies. The metal material (B) is in the developed form as in (a), and the side is bent as shown in (b) in the drawing through primary molding to form a partial side, and gradually moves to steps (c) and (d). It takes the shape of a square container and is completed through the final stage and the ironing stage.

Figure 14 schematically shows the three-dimensional shape of the metal material (B) being molded at each molding stage.

As can be seen from Figures 11 to 14, according to the forming method of the present invention, the side of the plate-shaped metal material (B) is gradually erected while securing a width sufficient to form the bottom surface of the square container from the beginning. Molding takes place.

Therefore, easy molding can be achieved without excessive stretching of the structure of the metal material, and a metal container of stable quality can be formed without damage or cracking of the structure.

15 to 17 show another embodiment of the present invention. Referring to this, a pair of parallel bending rollers 500 are installed above the bending die 110 and the drawing die 120.

The pair of bending rollers is installed to be movable in a direction perpendicular to the roller axis by a guide means in the form of a guide rail.

Each bending roller 500 is elastically biased inward by the roller elastic supporter 510.

The roller elastic support 510 uses a means for providing elasticity, such as a spring or a cylinder-type shock absorber.

When the bending roller 500 is installed in this way, the metal material (B) is placed on the upper side of the bending roller 500 as shown in FIGS. 16 and 17 and the punch 130 is operated. The pair of bending rollers (500) are pushed outward and descend between them, pushing the metal material (B) down. At this time, the outer surface of the metal material (B) is in rolling contact with the banding roller (500). This allows smooth banding to be achieved.

In particular, the bending roller 500 strongly presses the outer surface of the metal material (B) by the roller elastic support 510, so that bending of the metal material (B) can be performed more easily.

Figure 18 is a schematic side view showing another embodiment of the present invention. Referring to this, the bending die according to the present invention is made in the form of a pair of blocks facing each other, and each is a rolling bending die 600 that rotates around the bottom. It comes true.

The rolling banding die 600 rotates to face each other and comes into close contact with the molding surface of the punch (P) to bend and mold the metal material (B). Therefore, the forming angle is set according to the applied punch (P).

That is, when a punch with a wide angle is applied in the first forming step, the rolling banding die 600 is rotated accordingly and closely molded to match the angle of the punch (P), and when a punch with a narrow angle is applied, it is also molded accordingly. Close molding is performed, and when a close-to-vertical punch is applied in the final forming part, the rolling banding die is rotated in a close-to-vertical form and close molding is performed.

Accordingly, the rolling type banding die 600 is used simultaneously in each forming step without the need to replace the bending die in the forming part at each stage, and the work can be performed by replacing the punch and drawing die, etc.

Of course, if necessary, a rolling banding die or a fixed banding die can be selectively applied and used.

Since this rolling banding die 600 bends the front and back of a metal container that undergoes 'v' shape forming processing, a separate die or pad is applied to the bottom of the metal container.

Figure 19 shows another embodiment of the present invention to which a rolling type bending die is applied. Each outer surface of the rolling type bending die 600 is formed so that the rolling type bending die 600 can be more strongly brought into close contact with the punch (P). A pressurizing die 610 is further installed.

As the punch (P) descends, the metal material (B) comes into contact with the rolling banding die 600, thereby causing bending, and the rolling banding die 600 is pressed against the punch (P) by the pressure die 610. By being strongly pressed against the outer surface, the metal material (B) is formed exactly as the forming angle of the punch (P).

At this time, the pressing die 610 preferably has a contact surface made of an inclined surface in order to smoothly push the outer surface of the rolling bending die 600, and the rolling bending die 600 in contact with the inclined surface of the pressing die 610 The outer surface is preferably made of a curved surface.

Figure 20 shows a state in which step-by-step forming processing is performed by the rolling type bending die as described above.

Figures 20 (a) and (b) show the state in which the planar metal material (B) is first formed by primary punching, (c), (d), and (e) are secondary forming, It shows the 3rd forming and final forming stages.

In each of these forming stages, the rolling banding die 600 is applied as is without replacement, and the punch (P) and drawing die are replaced and applied according to the angle to form the die.

Therefore, simpler work and reduction of time and cost can be achieved, and all banding work of the entire forming step can be performed with a single banding die.

In each forming step, the rolling bending die 600 is rotated by the lowering of the punch P and the pressure of the pressing die 610 to form the metal material B. As shown in the drawing, the pressing die 610 ) pushes the rolling banding die 600 by the pusher 620, which descends along with the descent of the punch (P).

That is, the vertical movement of the push bar 620, which descends vertically together with the punch P, is linked to the horizontal movement of the pressing die 610 and acts on the rolling banding die 600.

The pressure die 610 may be interlocked with the pusher 620 through a contact surface as shown in the drawing, or may be driven by a separate driving means such as a rack and pinion or a pneumatic cylinder.

In this way, by applying the rolling banding die, the final forming work can be completed, and if necessary, a high-quality metal container product can be completed by going through an additional ironing step.

Figures 21 to 23 show another embodiment of the rolling type bending die according to the present invention, where Figure 21 is a schematic side view, Figure 22 is an operational state diagram, and Figure 23 is a process diagram.

Referring to these drawings, the rolling banding die 700 is formed in the form of a roller and is configured in a cam type that rotates eccentrically.

The rolling banding die 700 is rotated to face each other, and the opposing forming surface is formed as a surface corresponding to the forming surface of the punch for close contact with the punch P, and is flat in the drawing.

In this embodiment, as in the embodiments of FIGS. 18 to 20, bending is performed by folding the front and back sides from the bottom of the metal material (B), and the punch (P) and the rolling type are formed by lowering the punch (P). Banding molding is performed as the banding die 700 comes into close contact.

Looking at Figure 23 showing the process, (a) shows the state in which the flat metal material (B) is placed, (b) shows the first forming state of the 90° punch, and (c) shows the second forming state of the 50° punch. Indicates the molding state, (d) represents the 3rd molding state of a 20° punch, and (e) represents the final molding state.

In this series of processes, the rolling banding die 700 is applied to each step simultaneously without replacement, and the forming operation is performed by replacing the punch (P).

The pad 115 elastically supports the bottom of the metal material (B) by the pad elastic support 116, and the product is extracted after completion.

This cam-style rolling banding die 700 can also be brought into close contact with the punch by a separate pressure means such as a pneumatic cylinder or gear, and a pressure die as shown in FIGS. 19 and 20 may also be applied.

The present invention as described and shown above is not intended to be limited to the above-described embodiments, and may be implemented in various forms without departing from the gist of the present invention.

10 ; Guide block 20; support block
100 ; 1st forming department
110 ; First banding die 111; 1st plastic groove
112 ; Pad hole 113; Elastic member
115 ; pad 116 ; pad elastic support
120 ; 1st drawing die 121; 1st drawing home
122 ; bending part 130; 1st punch
140 ; 1st stripper 141 ; Elastic pressurizing member
145, 146 ; sleeve stripper 147 ; punch groove
200 ; 2nd molding department
210 ; Second banding die 211; 2nd plastic home
220 ; 2nd drawing die 221; 2nd drawing home
230 ; 2nd punch
300 ; 3rd forming department
310 ; Third banding die 311; 3rd plastic home
320 ; 3rd drawing die 330; 3rd punch
400 ; Final forming department
410 ; Final banding die 411; Final forming groove
412 ; molding hole 430; final punch
450 ; Final forming die 451; Molding outlet
451a ; Entry part 451b; vertical part
451c ; discharge part
460 ; Iron Block 461 ; Ioning Home
500 ; Banding roller 510; roller elastic support
600, 700 ; Rolling type banding die 610; Pressure die
620 ; Plunger
B ; Metal material P; punch

Claims (22)

A first bending die including a flat bottom surface and a first forming groove having a shape in which two surfaces facing the bottom surface expand upward, and a first punch having a bottom shape corresponding to the first forming groove. molding unit;
A second forming part including a second bending die having a second forming groove on which the two opposing surfaces extend upward at an angle narrower than the first forming groove, and a second punch having a bottom shape corresponding to the second forming groove. ;
a final forming unit including a final bending die having a final forming groove so that the two opposing surfaces are vertical or close to vertical, and a final punch having a shape corresponding to the final forming groove;
a drawing die installed in close contact with both sides of the first bending die, the second bending die, and the final bending die; and
a stripper installed on both sides of the first punch, the second punch, and the final punch, and descends with the punch to contact each drawing die and elastically press both sides of the metal material; Including,
In each forming part excluding the final forming part, a drawing groove having the same angle as the forming groove of each bending die in close contact with the drawing die is formed, and the stripper has a bottom shape corresponding to the drawing groove of the facing drawing die. It comes true,
A drawing and forming device for a metal container, characterized in that each drawing die is fixed in each forming part except the final forming part among the forming parts, and each bending die is lowered in a certain section downward when the punch is pressed.
According to claim 1,
Between the second forming part and the final forming part, one or more forming parts including a bending die, a punch, and a drawing die are further formed, and the bending die of each forming part is formed with a forming groove that is gradually narrower than the second forming part. A drawing and forming device for a metal container, characterized in that each punch is also configured with a bottom shape at a corresponding angle.
delete delete delete delete The method of claim 1 or 2,
The forming groove of the final bending die installed in the final forming part of each forming part has four sides inclined at an angle close to a right angle, and forming holes connected to a curved surface from each side of the forming groove are formed on the bottom, A final molding die is further installed below the final bending die of the final molding part, and a molding outlet is formed in the final molding die continuously penetrating the molding hole, and the molding discharge hole is an entry portion that gradually narrows continuously with the inclination angle of the molding hole. A drawing and forming device for a metal container, characterized in that it is continuously formed by a vertical part forming a vertical surface and a discharge part gradually expanding downward.
delete The method of claim 1 or 2,
A pair of parallel bending rollers are installed on the upper side of each bending die to be movable in a direction perpendicular to the roller axis, and each bending roller is pushed inward by a roller elastic supporter, so that the punch pushes the pair of bending rollers. A metal container drawing and forming device characterized in that it is lowered while pushing outward.
delete The method of claim 1 or 2,
The bending die is made of a rolling type bending die that is rotated to face and adheres to the punch at each stage and is formed according to the angle of the punch. The angle of the rolling type bending die is adjusted so that the rolling type bending die is pressed to the outer surface of the punch. A drawing and forming device for a metal container, characterized in that it is further provided with a pressure die that pushes the outer surface.
delete According to claim 11,
The press die is a metal container drawing and forming device, characterized in that the horizontal movement is performed in conjunction with the vertical movement of the push bar that descends along with the lowering of the punch.
According to claim 11,
The rolling type bending die is formed in the form of a pair of facing cams, and the surface in contact with the punch is a metal container drawing and forming device, characterized in that the surface is in close contact with the punch.
delete delete delete delete delete delete delete delete

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