KR20050054896A - Metallic vessel with reinforcing bead and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a metal container with a reinforcing bead and a method for manufacturing the same, and more particularly, in forming a seamless metal container having a height of 100 mm or more by using a metal sheet having a thickness of less than 1 mm, By forming a linear reinforcement bead in which the metal sheet itself is bent from the lower part of the body to the outer periphery of the bottom part, the mechanical strength of the metal container can be improved and the thickness of the metal sheet necessary for forming the container is increased. This makes it possible to make it thinner, thereby reducing the raw materials for the manufacture of metal containers by about 20 to 30%, thereby producing metal containers at a lower price, and at the same time reducing the weight of various products to which metal containers are applied. And metal containers with reinforcement beads formed therein to contribute greatly to the improvement of product competitiveness. It relates to the law.

Metal container with a reinforced bead according to the present invention, in the seamless metal container (1) formed by the deep-drawing (Deep-drawing) process of the metal sheet, the lower portion of the body portion (2) of the metal container (1) The reinforcing beads 4 are formed along the circumference of the metal container 1 at portions extending from the outer periphery of the bottom part 3 to the bottom of the metal container 1. It is characterized in that the metal sheet itself as a raw material is formed of a bent portion.

In addition, the method of manufacturing a metal container with a reinforcing bead according to the present invention, the blanking step (10) for blanking (blanking) the metal foil (5) to be the material of the metal container (1) in the form of a disc, and the blanking Drawing oil milking step 30 to apply the drawing oil 34 to the surface of the metal thin plate 5 after the step 10, and drawing oil 34 is applied after the drawing oil milking step 30 The thin metal plate 5 is placed on the lower mold 42 of the deep drawing press apparatus 40 ', and then the metal thin plate 5 is seamed as a stopper 44 and a punch 43 installed on the upper mold 41. In the process of forming the container 40 to form a metal container 1 which is not present, a metal thin plate 5 is mounted on the press mold between the blanking step 10 and the drawing milking step 30. Reinforcement for bending the linear reinforcement bead 4 along the portion spanning the trunk forming part 6 and the bottom forming part 7 of (5). DE characterized in that passes through the forming stage (20).

Description

Metal vessel with reinforcement bead and its manufacturing method {Metallic vessel with reinforcing bead and manufacturing method

The present invention relates to a metal container with a reinforcing bead and a method for manufacturing the same, and more particularly, in forming a seamless metal container having a height of 100 mm or more by using a metal sheet having a thickness of less than 1 mm, By forming a linear reinforcement bead in which the metal sheet itself is bent from the lower part of the body to the outer periphery of the bottom part, the mechanical strength of the metal container can be improved and the thickness of the metal sheet necessary for forming the container is increased. This makes it possible to make it thinner, thereby reducing the raw materials for the manufacture of metal containers by about 20 to 30%, thereby producing metal containers at a lower price, and at the same time reducing the weight of various products to which metal containers are applied. And metal containers with reinforcement beads formed therein to contribute greatly to the improvement of product competitiveness. It relates to the law.

In general, it acts as the outer or inner skin of various products such as out-casing, oven-casing of electric heat cooker or pressure cooker used for oil filter of automobile engine oil. The metal container is a metal sheet having various surface treatments or a metal sheet having a cold rolling treatment, and most of them are molded into a seamless metal container having a height of 100 mm or more using a metal sheet having a thickness of less than 1 mm.

As described above, a method of forming a seamless metal container having a height of 100 mm or more by using a metal thin plate having a thickness of less than 1 mm is used, and a molding method called deep drawing is used. Is a kind of drawing processing to increase the length while thinning the thickness of the metal sheet, which is the material of the metal container, by using the punch and the mold installed in the deep drawing press apparatus.

However, when a seamless metal container is manufactured using the deep drawing molding method as described above, the metal container which is required by pressing and punching by a metal mold can be quickly formed without welding the body part and the bottom part of the metal container separately. There was an advantage that can be, but because the appropriate strength is not given between the body portion and the bottom portion of the metal container is formed by a metal foil of less than 1mm there was a problem that the metal container is difficult to maintain a particular shape.

In other words, in the case of the metal container formed by the deep drawing molding method, the bottom portion of the metal container is maintained at a thickness similar to the initial thickness of the metal sheet, but the body portion is made thinner than the initial thickness of the metal sheet. There was a problem of easily rumbling or bending around the bottom part, and therefore, there was a problem in that the handling of the metal container and its use were difficult when manufacturing various products using the metal container.

In particular, in the case of metal containers that serve as the outer skin or the inner skin of products such as oil filters, electric heat cookers or pressure cookers of various engines, the inner diameter is 350 mm × the height of 200 mm from a small container having a diameter of 100 mm × height of 100 mm. Since there are various types to the large sized container, the metal container should be manufactured as thin as possible for cost reduction and light weight of the product while being able to take charge of various structural or electrical functions required for the product.

However, when the thickness of the metal sheet, which is the material of the metal container, is made thinner than necessary, the structural strength of the metal container becomes very fragile, so that the outer shell of a product such as an oil filter, an electric heat cooker or a pressure cooker or Metal containers that play the role of endothelial are applied to a metal sheet with a thickness ranging from 0.6mm (smaller diameter of 100mm x 100mm in height) to 0.8mm (350mm x 200mm in height). It has been.

However, even when forming a thin metal sheet having a thickness of 0.6mm ~ 0.8mm into a metal container by the deep drawing process, there was a problem that it is difficult to obtain a sufficient mechanical strength of the required degree, in order to compensate for this thicker metal container than When the metal plate is manufactured, as the material cost of the metal container is increased and the press apparatus for forming the metal container must be enlarged, the manufacturing cost of the metal container itself is increased, and the oil filter, the electric rice cooker or the pressure applied to the metal container is increased. The weight of a product such as a rice cooker has become heavy, causing a problem of reduced product competitiveness.

The present invention has been made in order to solve the above conventional problems, the metal container with a reinforcement bead according to the present invention and a method for manufacturing the same, using a metal thin plate having a thickness of less than 1mm seam having a height of 100mm or more. In forming a metal container without forming a metal reinforcing bead in which the metal sheet itself is bent from the bottom of the body to the outer periphery of the bottom of the metal container, the mechanical strength of the metal container can be improved. In addition, the thickness of the metal thin plate required for the molding of the container can be made thinner, thereby reducing the raw materials for the manufacture of the metal container by about 20 to 40%, so that the metal container can be manufactured at a lower price. At the same time, it can contribute greatly to the weight reduction of various products to which metal containers are applied and consequently to the improvement of product competitiveness. And that as a technical problem.

The metal container according to the present invention for achieving the above technical problem, in the seamless metal container formed by the deep-drawing (Deep-drawing) process of the metal foil, the outer portion of the bottom portion from the bottom of the body portion of the metal container The reinforcement bead is formed along the circumference of the metal vessel along the periphery of the periphery, the reinforcement bead is characterized in that the metal foil itself is formed of a bent portion formed of the metal container, according to the present invention The method of manufacturing a metal container includes a blanking step of blanking a metal sheet, which is a material of the metal container, in the form of a disc, and a drawing oil milking step of applying drawing oil to the surface of the metal sheet after the blanking step; After the drawing oil milking step, the metal sheet coated with drawing oil is placed on the lower mold of the deep drawing press apparatus, and then In the process of forming a container for forming a metal foil into a seamless metal container as a stopper and a punch installed in the mold, between the blanking step and the drawing milking step, the metal sheet is mounted on the press mold to form the body of the metal sheet. And a reinforcement bead forming step of bending and forming a linear reinforcement bead along a portion over the bottom portion.

Hereinafter, described in detail with reference to the accompanying drawings, the present invention for achieving the above object is as follows.

1 is a side cross-sectional view showing a metal container according to the present invention, Figure 2 is a partially cutaway perspective view showing an enlarged main portion of the metal container according to the present invention, Figure 3 is a process showing a method for producing a metal container according to the present invention. 4 and 5 are schematic process diagrams showing a blanking step and a reinforcing bead forming step of the manufacturing method according to the present invention, and (a) to (d) of FIG. 6 according to the manufacturing method according to the present invention. It is a top view which shows the metal sheet in which the reinforcement bead was shape | molded.

7 is a schematic process diagram showing the drawing milking step of the manufacturing method according to the present invention, Figure 8 is a side cross-sectional view showing a deep drawing press apparatus used in the manufacturing method according to the present invention, ) To (c) are partial side cross-sectional views showing the container forming step by the deep drawing press apparatus, wherein the unexplained numerals 31a, 32a and 47a are rotational shafts, 42a are container forming surfaces, and 49a are auxiliary It represents a roller.

Metal container formed with reinforcement beads according to the present invention is the outer casing of various products such as out-casing used in the oil filter of the engine oil of automobiles, oven-casing of electric heat cooker or pressure cooker. In the metal container serving as the inner skin or the inner skin, it is particularly applied to a seamless metal container that is formed to have a height of 100 mm or more by using a metal thin plate whose thickness is less than 1 mm.

As shown in Fig. 1 and Fig. 2, the metal container 1 according to the present invention, in the seamless metal container 1 formed by the deep drawing (Deep-drawing) of the metal sheet, the metal A reinforcement bead 4 in a linear shape, ie, in the form of a stripe, is formed along the circumference of the metal container 1 in a portion extending from the lower part of the body part 2 constituting the container 1 to the outer circumference of the bottom part 3. It is made of a formed configuration, the reinforcement bead (4) is made of a metal sheet itself is formed bent portion of the metal container (1).

As described above, the reinforcing beads 4 formed in the portion extending from the lower portion of the body portion 2 of the metal container 1 to the outer periphery of the bottom portion 3 are shown to have a ring shape in the drawing. The bead 4 has a floral shape or a straight or bottom 3 outer periphery formed radially across the outer periphery of the bottom 3 and the lower part of the body 2 with respect to the center of the bottom 3 of the floral pattern. And it can be formed in a wide variety of forms, such as the waveform (wave form) that extends along the circumference of the metal container (1) over the lower body portion (2).

In other words, before forming the seamless metal container 1 using the metal thin plate, the metal thin plate itself over the part where the bottom part 3 of the metal container 1 is molded and the body part 2 is molded. The shape itself of the entire reinforcement bead 4 can be arbitrarily changed under the condition of forming the stripe reinforcement beads 4 by bending.

However, the site where the reinforcement bead 4 is formed is within the range of 1/4 to 3/4 from the bottom 3 on the basis of the entire height of the body portion 2 of the metal container 1, In the case of the part 3, it is also in the range of 1/4 to 3/4 based on the distance from the outermost part to the center point of the bottom part 3, the metal thin plate by the shaping | molding of the reinforcement bead 4 It is even more preferable in terms of sufficiently achieving mechanical (structural) strength reinforcement of the metal container 1 while minimizing the difficulty of work due to the dimensional change of the reinforcement bead 4 and the molding of the reinforcement bead 4.

In addition, the reinforcement bead 4 is preferably such that the width and height first formed on the metal thin plate for forming the metal container 1 are within a range of 0.5 to 3 mm, and the width and height of the reinforcement bead 4 are 0.5. If it is less than mm, not only the work of forming the reinforcing beads 4 on the metal sheet becomes difficult, but also the width of the reinforcing beads 4 in the process of drawing the trunk portion 2 by deep drawing. Since the height and height are smaller than the original dimension, it is not preferable in terms of strength reinforcement of the metal container 1.

In addition, when the width and height of the reinforcement bead 4 first formed on the metal sheet exceeds 3mm, the forming of the reinforcement bead 4 can be relatively easy, but the metal container in the forming process of the reinforcement bead 4 Since many dimensional changes occur in the metal sheet itself, which is the material of (1), not only the dimensional accuracy due to the molding of the metal container 1 decreases, but also the number of reinforcing beads (4) that can be molded per same area is relatively high. Since it becomes less, it is not preferable also in terms of strength reinforcement of the metal container (1).

Then, the spacing between each reinforcing bead (4) first formed on the metal sheet is preferably within the range of at least 2mm to a maximum of 50mm, when the spacing between the reinforcing beads (4) is less than 2mm reinforcing beads on the metal sheet (4) becomes difficult to work, and if the spacing between the reinforcing beads (4) exceeds 50mm undesirably in terms of strength reinforcement of the metal container (1), the reinforcing beads (4) within the above range It should be arranged in an appropriate number.

However, the range of numerical limitations described above may be referred to as one recommendation in the metal container 1 according to the present invention, the size and shape of the seamless metal container (1) and the manufacture of the metal container (1) According to the precision of the various equipments used in the user can be found that the user can mold the metal container 1 in a form slightly outside of the numerical limits, which is also naturally included in the technical idea to achieve the present invention. will be.

In addition, although the upper end portion of the metal container 1 is shown in the drawing bent in the shape of a flange, the flange may not be formed according to the product to which the metal container 1 is applied, the metal container (1) ) Is shown as having a cylindrical shape, the metal container (1) may have a shape of a square cylinder or other shapes other than that.

Metal container 1 of the present invention in which a linear, ie, striped, reinforcing bead 4 is formed along a portion extending from the lower side of the trunk portion 2 to the outer circumference of the bottom portion 3 as described above. When described in detail with reference to the accompanying drawings a manufacturing method according to the present invention for manufacturing.

In the method of manufacturing a metal container having a reinforcing bead according to the present invention, as shown in the process block diagram of FIG. 3, a blanking step of blanking a metal sheet, which is a material of the metal container 1, in the form of a disc. (10), the reinforcing bead forming step (20) of bending the reinforcing beads (4) on the blanked metal sheet, and the pretreatment before forming the metal sheet (1) in which the reinforcing beads (4) are formed into the metal container (1). The step of drawing milking step 30 and the container forming step 40 of forming the metal container 1 by the deep drawing press device, and after the processing and productization after the container forming step 40 As a step, the metal container 1 undergoes a trimming and washing step 50 and a painting and drying step 60.

First, as shown in FIG. 4, the blanking step 10 includes a punching die fixed to the lower frame 12 by a metal sheet 5 having a thickness of less than 1 mm having various surface treatments or cold rolling treatments. 14) in a state in which it is placed on the upper frame 11, using a punching die 13 fixed to the metal plate 5 in the form of a disc to cut, the lower periphery of the punching die 13 Cutting edges 15 for blanking the thin plates 5 are formed.

Also, in the drawing, the cutting edge 15 is pressed to the outside of the punching die 14 while the metal foil 5 is supported by the punching die 14 to cut the metal foil 5. It has a structure to make, but besides the blanking device of the form in which the rod-shaped punching mold is inserted into the punching groove in a state in which a circular punching groove having a predetermined diameter is formed on the punching die 14. It may be used, and the former is formed more smoothly than the latter.

After the blanking step 10 as described above, by mounting the blank metal sheet 5 in the form of a disc to the press mold linear (ie, linear, ie, stripe reinforcement along a specific portion of the metal sheet 5) The reinforcing bead forming step 20 for bending the bead 4 is performed.

As shown in FIG. 5, the press mold used in the reinforcing bead forming step 20 has a bead molding portion 25 protruding from the bottom surface of the upper mold 23 fixed to the upper frame 21. On the upper surface of the lower mold 24 fixed to the lower frame 22, a bead molding groove 26 into which the bead molding portion 25 is inserted is formed, thereby forming the blanked metal sheet 5 into the lower mold 24. When the upper mold 23 is pressed onto the lower mold 24, the reinforcing beads 4 can be bent on the metal foil 5.

In addition, the press mold used in the reinforcing bead forming step 20 allows the reinforcing bead 4 to be molded at the exact position of the metal thin plate 5 and at the same time, the reinforcing bead 4 is molded to a more accurate dimension. In order to be able to be, the lifting operation of the upper frame 21 may be performed along a guide means such as a guide rod fixed to the lower frame 22, or the metal mold 5 of the lower mold 24 Electromagnets or permanent magnets or vacuum suction fixing means capable of fixing the position may be installed.

In FIG. 6, the metal thin plate 5 which has undergone the reinforcing bead forming step 20 is illustrated according to its shape, and (a) shows the body forming part 6 and the bottom forming part of the metal container 1. A plurality of rows of reinforcement beads (4) are molded in a ring shape over (7), and (b) shows that the reinforcement beads (4) are formed in a flower pattern shape at the same site, and is shown in (C). In this case, straight reinforcement beads 4 are radially formed at the same site, and in (d), wavy reinforcement beads 4 are successively formed along the corresponding site.

However, as already mentioned above, the metal sheet 5 itself is bent over the body portion 6 and the bottom portion 7 for forming the metal sheet 5 into the metal container 1. That is, under the condition of forming the reinforcing beads 4 in the form of stripes, the shape of the entire reinforcing beads 4 can be arbitrarily changed, and the width and height of the reinforcing beads 4 and the ring or the floral pattern itself can be changed. The number and spacing or rows of reinforcing beads 4 constituting them or the spacing or rows of reinforcing beads 4 in radial or corrugated form may also be adjusted arbitrarily within the numerical limits of the recommendations mentioned above.

After the reinforcement bead forming step 20 as described above, as a pretreatment step for forming the metal thin plate 5, the reinforcement bead 4 is formed into a seamless metal container (1) using a deep drawing press device, Drawing oil (SUNGWON LUBRICANTS CO., LTD.) Sold under the trade names D518S, FD1500S, FD4000E, FD3000E on the surface of the metal sheet 5, various press oils or drawing oils having a similar function The milking step 30 is applied to apply the containing}.

As shown in FIG. 7, the drawing oil milking step 30 uses the transfer conveyor 35 to transfer the metal sheet 5 formed with the reinforcement beads 4 to the upper roller 31 and the lower roller 32. At the same time as the transfer between the upper roller 31, the storage tank 33 in which the drawing oil 34 is stored is installed on the upper side of the upper roller 31, drawing oil 34 from the storage tank 33 to the surface of the upper roller 31 By flowing down, the drawing oil 34 buried on the surface of each of the rollers 31 and 32 rotating while facing each other is evenly applied to the upper and lower surfaces of the metal foil 5.

In addition to the method of applying the drawing oil 34 by the rotation of the rollers 31 and 32 as described above, the metal thin plate 5 on which the reinforcing beads 4 are formed is directly transferred to the inside of the tank in which the drawing oil 34 is stored. It is also possible to use a coating method such that the metal thin plate 5 is immersed in the drawing oil 35, but the drawing oil 34 applied to the surface of the metal thin plate 5 should be removed by pickling. It is desirable to take the approach.

After the drawing oil application step 30 as described above, the drawing oil 34 is transferred to the deep drawing press apparatus the metal thin plate 5 coated on the upper and lower sides from the lower side of the body portion (2) The container forming step 40 of forming a seamless metal container 1 in which linear reinforcement beads 4 are formed over the outer circumference of the bottom 3 is performed.

As a representative example of the deep drawing press apparatus 40 ′ used in the container forming step 40, as shown in FIG. 8, a stopper 44 is installed at a lower surface thereof, and a punch 43 is disposed at the center thereof. A lower mold having an upper mold 41 inserted into a lowering direction and a container forming surface 42a into which a punch 43 is inserted in the center of the body in contact with the stopper 44 of the upper mold 41 ( 42), the lower mold 42 is on the bed 48 to move up and down by the operation cam 49 and the auxiliary roller (49a) of the upper side installed on the rotary shaft (47a) of the flywheel 47 And the punch 43 of the upper mold 41 is fixed to the ram 45 linked to the flywheel 47 by the crank arm 46 so that the lower mold 42 and the relative movement are fixed. This is possible with a bottom slide drawing press.

However, the above-mentioned crank double acting press is only one typical use case for the formation of the seamless metal container 1, and in addition, various press devices such as crank single acting presses or various hydraulic presses are used for deep drawing press apparatus ( Not only can be applied to the 40 '), but also the crank-type double-acting press is divided into various types in terms of form, the press apparatus 40' used in the container forming step 40 is the press apparatus shown in FIG. It is not limited to 40 ', and any press apparatus may be used as long as the metal container 1 can be molded by the molding principle shown in FIG.

The process steps for forming the metal container 1 according to the present invention using the deep drawing press apparatus 40 'as described above, as shown in (a) of FIG. 9, the drawing oil 34 Is placed on the lower mold 42 of the deep drawing press apparatus 40 ', and the portion where the reinforcing beads 4 are formed is the body portion 2 of the metal container 1. And the bottom portion 3, that is, placed on the upper circumferential portion of the container forming surface 42a of the lower mold 42.

As shown in (b) of FIG. 9 in the above state, the lower mold 42 is the upper mold 41 by the rotational force of the operating cam 49 installed on the rotary shaft 47a of the flywheel 47. By being in close contact with the stopper 44 of), the stopper 44 of the upper mold 41 is primarily to hold the outer peripheral surface of the metal sheet 5 together with the lower mold 42, the stopper 44 and the lower mold The forming part of the reinforcing bead 4 should be considered in the initial design so that the reinforcing bead 4 is not formed in the portion of the metal thin plate 5 which is in close contact between the 42 and 42.

As shown in (c) of FIG. 9 in the above state, when the punch 43 descends together with the ram 45 by the link action of the crank arm 46 according to the rotation of the flywheel 47. When the punch 43 is inserted into the container forming surface 42a of the lower mold 42, the metal thin plate 5 is pressurized, thereby increasing the material of the metal thin plate 5. The metal container 1 according to the present invention in which the reinforcing beads 4 are formed over the outer circumference of the lower side and the bottom portion 3 can be formed.

As described above, the reinforcing beads 4 formed on the bottom 3 of the metal container 1 after the drawing process by the deep drawing press apparatus 40 'are formed on the metal thin plate 5. The reinforcement bead 4 formed in the body portion 2 of the metal container 1 has a shape substantially similar to that of the first reinforcement bead 4 formed, and the reinforcement bead 4 formed on the metal thin plate 5 first. Its length increases while its width and depth are relatively reduced.

After the container forming step 40 as described above, as a post-treatment and commercialization step of the molded metal container 1, trimming of the metal container 1 (surface finishing of the metal container, bending of the flange portion) Processing) and the surface scale and pickling step (34) for removal of the drawing oil (34), and then coating the paint of various colors on the surface of the metal container (1) and drying it ( By passing through 60, the metal container 1 as a final finished product can be manufactured.

The metal container 1 according to the present invention manufactured as described above has a linear reinforcement bead in which the metal thin plate 5 itself is bent over the outer periphery of the bottom portion 3 from the lower side of the body portion 2. Since 4 is formed, it is possible to impart excellent mechanical strength to the connection portion between the trunk portion 2 and the bottom portion 3, whereby the trunk portion 2 is in contact with the bottom portion 3. It is possible to maintain a unique shape of the metal container (1) without easily rumbling or bending around the connection portion.

Therefore, when manufacturing a variety of products with the metal container (1) according to the present invention will be able to perform the handling and use of the metal container (1) more smoothly, in particular the oil filter or electric rice cooker of various engines or In a metal container (1) serving as an outer shell or an inner shell of a product such as a pressure cooker, the metal container (1) may be responsible for various structural or electrical functions required for the product. The thickness of the metal thin plate 5 used in the can be made even thinner.

That is, the metal container 1 is manufactured from a metal thin plate 5 having a thickness of about 0.8 mm (a container having an inner diameter of 350 mm × a height of 200 mm) from 0.6 mm (smaller container having an inner diameter of 100 mm × height of 100 mm). Compared with one case, under the same conditions, the application thickness of the metal thin plate 5 is from 0.45 mm (smaller container having an inner diameter of 100 mm × 100 mm in height) to 0.6 mm (a container having an inner diameter of 350 mm × 200 mm in height). Even if it is thin, it is possible to manufacture the metal container 1 whose structural and mechanical strength becomes better.

This is to thin the thickness of the metal thin plate 5 used in the manufacture of the metal container 1 by about 0.15mm (0.6mm-0.45mm) to 0.2mm (0.8mm-0.6mm), the conventional Compared to the thickness of the metal thin plate 5 applied to the material, the raw material can be reduced to about 25% {(0.15mm / 0.6mm) × 100, (0.2mm / 0.8mm) × 100}. Because of this, it is possible to greatly contribute to the cost reduction according to the manufacture of the metal container (1).

In addition, as the thinner metal plate 5 can be used, the press apparatus 40 'for forming the metal container 1 can be made smaller than in the conventional case, and thus, the production of the metal container 1 can be performed. It will be able to contribute more significantly to the cost savings, and by reducing the weight of the product, such as an oil filter or electric heat cooker or pressure cooker to which the metal container (1) of the present invention will be able to contribute significantly to the improvement of product competitiveness.

In particular, the blanking step 10 and the reinforcement bead forming step 20 of the process step according to the present invention can be integrated into one step, for this purpose punching mold 13 of the blanking device shown in FIG. Projecting the bead forming portion 25 as shown in Figure 5 on the bottom surface, and to form a bead forming groove 26 as shown in Figure 5 on the upper surface of the punching die 14 of the blanking device. As a result, the reinforcing beads 4 can be formed on the blanked metal thin plates 5 while passing through the blanking step 10 of the metal thin plates 5.

Integrating the blanking step 10 and the reinforcement bead forming step 20 into one step as described above, without the additional process step in the conventional process step for forming the seamless metal container (1) It is to be able to manufacture the metal container (1) of the present invention excellent in structural and mechanical strength, which serves to further contribute to the cost reduction according to the production of the metal container (1) according to the present invention.

Lastly, the above description is for the process of manufacturing the metal container 1 of the present invention using the general metal thin plate 5, but the applicant is filed as a patent application No. 8621 in 2003 and registered as No. 483192. Date: April 4, 2005) also in the method of manufacturing a metal container using a color steel sheet, the reinforcing bead forming step 20 immediately after the blanking step of the color steel sheet, or at the same time as the blanking step of the color steel sheet If (4) is to be molded, it is clear that even without a separate pickling or painting and drying step (50) (60), it is possible to produce a color metal container having a beautiful color and excellent mechanical strength. It is.

Hereinafter, a method of manufacturing a metal container molded with reinforcement beads according to the present invention will be described in more detail with reference to the following examples, and the manufacturing method of the present invention is not limited to the following examples, and other similar methods It is to be understood that various forms of embodiments exist.

<Example 1>

Blanking a 0.5mm thick metal sheet formed by cold rolling into a 300mm diameter disk, and reinforcing beads having a ring shape over the trunk and bottom portions of the metal sheet at 90 ° angle range. The array of reinforcing beads forming the ring shall be 4 rows, its width and height should be 2mm, and the spacing between each reinforcing bead should be 3mm, and then the drawing diameter is applied to the surface of the metal sheet. As a 200 mm deep drawing press apparatus, a metal thin plate was deep drawn to prepare a metal container having a height of 120 mm and an inner diameter of 200 mm and a ring-shaped reinforcement bead formed from the bottom of the body to the outer periphery of the bottom.

<Example 2>

While blanking a 0.6 mm thick metal sheet formed by cold rolling into a 400 mm diameter disk, simultaneously forming a reinforcement bead having a continuous wave shape along the trunk portion and the bottom portion of the metal sheet during the blanking process. The number of rows of reinforcement beads forming a wave is 2, the width and height are 1mm, and the interval between each reinforcement bead is 4mm. After drawing oil is applied to the surface of the metal sheet, a deep drawing press having a punch diameter of 250mm As a device, a thin metal plate was deep-drawn to prepare a metal container having a height of 200 mm and an inner diameter of 250 mm and a corrugated reinforcement bead formed from the lower side of the body to the outer periphery of the bottom.

As described above, the metal container and its manufacturing method according to the present invention form a linear reinforcement bead in which the metal sheet itself is bent over the outer periphery of the bottom part from the bottom of the body part forming the metal container, It has the effect of imparting excellent mechanical strength to the connection part of the body, which makes it possible to maintain the inherent shape of the metal container without easily rumbling or bending around the connection part with the bottom part. have.

Therefore, when manufacturing a variety of products with the metal container of the present invention there is an effect to perform the handling and use of the metal container more smoothly, in particular the shell of the product, such as oil filters, electric heat cooker or pressure cooker of various engines Alternatively, in the metal container serving as the endothelial role, the thickness of the metal plate used in the metal container may be in a range of about 0.15 mm to 0.2 as compared to the conventional case, while being able to perform various structural or electrical functions required for the product. It is effective to make it thinner by mm.

Even if the thickness of the metal sheet is thinner as described above, the structural and mechanical strength of the metal container can be improved by the reinforcing beads, and the raw material used for the metal container is about 20 to 30%. At the same time, it is possible to reduce the size of the press apparatus for forming the metal container at the same time, and to reduce the size of the metal container, thereby greatly contributing to the cost reduction of the metal container. There is an effect that can greatly contribute to the weight reduction of the applied product and thereby improve product competitiveness.

In particular, when the blanking step of the metal sheet and the reinforcing bead forming step of the process step according to the present invention is integrated into one step, without the addition of a separate process step in the conventional process step for forming a seamless metal container. It is possible to manufacture a metal container excellent in structural and mechanical strength, which is an effect that can further contribute to the cost reduction according to the production of the metal container according to the present invention.

1 is a side cross-sectional view showing a metal container according to the present invention.

Figure 2 is a partially cut perspective view showing an enlarged main portion of the metal container according to the present invention.

Figure 3 is a process block diagram showing a method of manufacturing a metal container according to the present invention.

4 and 5 is a schematic process diagram showing a blanking step and a reinforcement bead forming step of the manufacturing method according to the present invention.

Figure 6 (a) to (d) is a plan view showing a metal sheet in which reinforcement beads are molded according to the manufacturing method according to the present invention.

Figure 7 is a schematic process diagram showing the drawing milking step of the manufacturing method according to the present invention.

Figure 8 is a side cross-sectional view showing a deep drawing press apparatus used in the manufacturing method according to the present invention.

Figure 9 (a) to (c) is a side cross-sectional view showing a step of forming a container by a deep drawing press apparatus.

<Explanation of symbols for main parts of drawing>

1: metal container 2: body part 3: bottom part

4: Reinforcement Bead 5: Metal thin plate 6: Body molding part

7: floor molding 10: blanking step 11,21: upper frame

12,22: lower frame 13: punching mold 14: punching die

15: cutting edge 20: reinforcing bead forming step 23,41: upper mold

24,42: Lower mold 25: Bead molding part 26: Bead molding groove

30: drawing oil milking step 31: upper roller 32: lower roller

33: storage tank 34: drawing oil 35: transfer conveyor

36: discharge conveyor 40: container forming step 40 ': press device

43: Punch 44: Stopper 45: Ram

46: crank arm 47: fly wheel 48: bed

49: operation cam 50: trimming and washing step 60: painting and drying step

Claims (3)

In the seamless metal container 1 formed by the deep-drawing process of a metal sheet, A linear reinforcement bead 4 is formed along the circumference of the metal container 1 at a portion of the metal container 1 extending from the lower side of the body part 2 to the outer circumference of the bottom part 3. The reinforcing bead (4) is a metal container with a reinforcing bead, characterized in that the metal thin plate itself to be a material of the metal container (1) is formed bent. Blanking step (10) for blanking (thinning) the metal thin plate (5), which is the material of the metal container (1), in the form of a disc, and drawing oil on the surface of the metal thin plate (5) after the blanking step (10) The drawing oil milking step 30 to apply the drawing oil 34 and the metal foil 5 coated with the drawing oil 34 after the drawing oil milking step 30 is applied to the lower portion of the deep drawing press apparatus 40 ′. The container 42 is placed on the mold 42 and then subjected to a container forming step 40 for forming the metal foil 5 into a seamless metal container 1 as a stopper 44 and a punch 43 installed in the upper mold 41. In that, Between the blanking step 10 and the drawing oil milking step 30, a metal thin plate 5 is mounted on a press mold to cover the body forming part 6 and the bottom forming part 7 of the metal thin plate 5. A method of manufacturing a metal container with a reinforcement bead, characterized in that through the reinforcement bead forming step (20) to bend the linear reinforcement bead (4) along. 3. The blanking step (10) according to claim 2, wherein the reinforcing bead forming step (20) blanks the metal foil (5) in the form of a disc by a punching die and a punching die having a molding surface of the reinforcing beads (4). Method for producing a metal container with a reinforcing bead, characterized in that at the same time.