JP2007015016A - Method for manufacturing metal plate having cambered hole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a metal plate having cambered holes. <P>SOLUTION: The method comprises the following processes: a process of a material preparing step; a process of a symmetrical press step, where a sheet material is pressed in a vertical direction; a process of a pressing and cutting step, where a remaining edge is cut away; a process of a split step, where a semifinished product, whose remaining edge is cut away, is placed in a die for die pressing and two separated semifinished products are manufactured; and at least one process of a curved surface die-pressing step, where the separated semifinished product is disposed in a lower die, corresponding to a desired curved surface for die pressing so that the cut lines of desired holes on a curved surface are perpendicular to the die pressing direction, and a product with holes formed by die pressing is manufactured. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a sheet metal product having cambered holes, more specifically, using a deep drawing technique to form a camber (or curved surface) on the plate, and The present invention relates to a method of manufacturing a product having circular holes on a camber for a radial axial diameter.

  The manufacture of metal plates is a traditional technique, and metal plate products can be produced in any desired manner by appropriate design and use of molds, regardless of whether the products are manufactured by deep drawing, stamping or bending. It can also be manufactured in shape. Cold working of metal plates is a common prior art.

  On the other hand, metal plates used to produce workpieces or products with curved surfaces or camber holes are sometimes folded. For example, the edge of the outer frame of an electronic device of an appliance typically employs such a manufacturing process to provide ventilation and heat dissipation. In many cases, polymer injection molding is employed for manufacturing. Of course, the texture of this type of finished product is not as good as that produced by a metal plate. However, the production of metal plates is more difficult than the production by polymer injection molding. If a conventional embossing method is used, and then a deep drawing method is employed, the camber holes so produced can easily deform and thus have a defect in the appearance of the product.

In view of the shortcomings of the prior art, the inventors of the present invention have developed a method for producing sheet metal products with camber holes according to the present invention, based on years of experience in the machine manufacturing and design industry, which has conducted extensive research and experimentation. Was finally invented.
Accordingly, it is a main object of the present invention to overcome the disadvantages of the prior art by providing a method for producing a sheet metal product having camber holes.

In order to achieve the above object, a method for producing a metal plate product having a camber hole according to the present invention comprises:
Developing a product to form a sheet material and producing two metal products by aligning the products against each other; a material preparation step;
A symmetrical pressing step, wherein the sheet material is pressed vertically by a mold to produce a semi-finished product having a curved surface and a remaining edge;
Placing the semi-finished product together with the remaining edge in the mold and cutting the remaining edge by embossing the semi-finished product in a vertical direction;
A step of splitting the semi-finished product with the remaining edge cut away in a mold for embossing to produce two separate semi-finished products;
The separated semi-finished product is placed in the lower mold corresponding to the desired curved surface for stamping so that the cut-out line of the curved surface of the desired hole is perpendicular to the stamping direction. And comprising the steps of at least one curved surface embossing step to produce a product with the arranged and embossed holes.
In addition, it is preferable that the material preparing step uses the mold to remove an excess portion.
Further, it is preferable that the remaining edge portion is disposed on both sides of the semi-finished product.
It is also preferred that the pressing and cutting step is capable of embossing holes from a horizontal surface.
Further, it is preferable that the dividing step includes a forming step for forming the semi-finished product by the mold.
It is also preferred that the step of embossing the curved surface can be repeated depending on the angle of the curved surface and the position of the hole.
Furthermore, it is preferable that the hole has a shape selected from a circular shape, an elliptical shape, a square shape, a triangular shape, a star shape, and a heart shape.

  The present invention can overcome the disadvantages of the prior art that the manufactured holes can be easily deformed, and the present invention can also provide circular holes on the curved surface of the metal product. .

  Objects, shapes, structures, devices, features and performance of the present invention will become apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings.

  Referring to FIG. 7 for the desired product A of the present invention, a curved surface B is produced by deep drawing of a metal plate, and the curved surface has at least one hole H. For simplicity, flow charts and semi-finished drawings of the present invention are used for illustration. The manufacturing method of the present invention includes a material preparation step 1, a symmetrical pressing step 2, a press cutting step 3, a dividing step 4, and a curved surface stamping step 5 in order to manufacture a product A.

  Material preparation step 1 manufactures two pieces of product A in the following steps by unfolding product A so that the two pieces of product A are symmetrical and placed opposite each other For obtaining a metal plate for. The tensile force when the deep drawing is applied is uniform so that the product does not deform. This step also cuts off excess portion D as shown in FIG. The surplus part is removed, thus producing a semi-finished product E with openings. This product can use prior art molds or molding methods to produce Product A. Molds or molding methods are prior art and are therefore not described here.

  Symmetric pressing step 2 uses the pressing method to place the semi-finished product produced in material preparation step 1 in a mold, form two connected products A and produce semi-finished product F To do. The semi-finished product has at least one curved surface B. In the meantime, this step presses to produce a separated remaining edge G as shown in FIG. The remaining edge G is disposed on the top and bottom of both side surfaces of the product A.

  The press cutting step 3 uses a die to press and cut the remaining edge G in the vertical direction. This step can be used for embossing if it is necessary to produce holes H on the front side (which is the horizontal side). However, the embossing process is prior art and is therefore not described here. The semi-finished product J manufactured in this step is shown in FIG. Since the embossing is in the vertical direction, the holes H on each surface are theoretically circular in shape.

  Split step 4 uses a mold to split a pair of workpieces centrally (ie, into two halves) to produce two workpieces or semi-finished product K as shown in FIG. To do. The mold can then be used to stamp a hole on the front or flat surface. The semi-finished product K goes through conventional forming techniques in order to be formed and beautified. However, the additional forming steps are prior art and are therefore not described here.

  In the step 5 of embossing the curved surface, a cut surface (line) of the curved surface is produced at the desired embossing hole position of the separated semi-finished product K so as to become a horizontal surface by the mold design. The semi-finished product K is placed in the lower mold. The upper mold is manufactured by embossing a desired circular hole M as shown in FIG. However, the hole is not limited to a circular shape. The holes M arranged in the curved surface have the least deformation when viewed from the front side (in the vertical direction). If multiple rows of holes are embossed, the mold design will impress the holes M with minimal deformation and level the curved surface of the embossing to produce a product as shown in FIG. Used for surface.

  As previously mentioned, the holes of the present invention are not limited to circular holes, but may be oval, square, triangular, star / heart shaped or hexagonal depending on the design of the stamping die. Good.

  In summary, the present invention meets the requirements of this patent application and is filed for patent application. It should be understood, however, that the description and accompanying drawings are used to describe a preferred embodiment of the invention and that the invention is not limited thereto. On the contrary, the present invention is intended to cover various modifications and similar arrangements and procedures, and thus, the appended claims are intended to cover such modifications and similar arrangements and procedures. The widest interpretation should be allowed.

It is a manufacturing flow chart of the present invention. 1 is a schematic view of a preparation material according to the invention. FIG. 3 is a schematic view of a semi-finished product after performing a pressing step according to the present invention. FIG. 4 is a schematic view of a semi-finished product after performing a second pressing and stamping step according to the present invention. FIG. 6 is a schematic view of a semi-finished product after performing a dividing step according to the present invention. FIG. 3 is a schematic view of a semi-finished product after embossing a curved surface in the lateral direction according to the present invention. It is the schematic of the finished product of this invention.

Explanation of symbols

1 Material preparation step 2 Symmetric press step 3 Press cutting step 4 Division step 5 Curved surface stamping step A Product B Curved surface D Surplus part E, F, J, K Semi-finished product G Remaining edge H, M Hole

Claims (7)

Developing a product to form a sheet material and producing two metal products by aligning the products against each other; a material preparation step;
A symmetrical pressing step, wherein the sheet material is pressed vertically by a mold to produce a semi-finished product having a curved surface and a remaining edge;
Placing the semi-finished product together with the remaining edge in the mold and cutting the remaining edge by embossing the semi-finished product in a vertical direction;
A step of splitting the semi-finished product with the remaining edge cut away in a mold for embossing to produce two separate semi-finished products;
The separated semi-finished product is placed in the lower mold corresponding to the desired curved surface for stamping so that the cut-out line of the curved surface of the desired hole is perpendicular to the stamping direction. A method of manufacturing a sheet metal product with camber holes, comprising the steps of: at least one curved surface embossing step to produce a product with the arranged and embossed holes.   The method of manufacturing a metal plate product having a camber hole according to claim 1, wherein the material preparing step uses the mold to remove an excess portion.   The method of manufacturing a metal plate product having a camber hole according to claim 1, wherein the remaining edge portion is disposed on both sides of the semi-finished product.   The method of manufacturing a metal plate product having a camber hole according to claim 1, wherein the pressing and cutting step can emboss the hole from a horizontal surface.   The method of manufacturing a metal plate product having a camber hole according to claim 1, wherein the dividing step includes a forming step for forming the semi-finished product by the mold.   The method of manufacturing a metal plate product having a camber hole according to claim 1, wherein the embossing step of the curved surface can be repeated according to an angle of the curved surface and a position of the hole. . The metal plate product having a camber hole according to claim 6, wherein the hole has a shape selected from a circular shape, an elliptical shape, a square shape, a triangular shape, a star shape and a heart shape. how to.

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