JP2745402B2 - Press forming method of metal molded product having arc-shaped bent mountain flange - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide rail of a slide-openable console box of an automobile.
The present invention relates to a method for press-forming a metal molded product having a mountain-folded flange portion bent in an arc shape.

[0002]

2. Description of the Related Art Conventionally, a metal molded product 31 having an arc-shaped bent flange portion 33 used for a lid or the like which is opened and closed by sliding as shown in FIG. 16 has been formed by a roll forming method. 17 and 18 (A) and (B)
As shown in the above, the conventional roll forming method includes several sets of rollers 40-1, 40-2, 41-1, 41-2, 41-3.
Is formed on the strip material S by using a roll forming machine combining
The original shape is cut by press forming while leaving necessary contours such as an edge portion 34, an edge portion 35, a blanket 36, and the like.
, And the formed member was bent by a bending machine to form a metal molded product.

[0003]

However, in the conventional roll forming method, the bending process by the bending machine generates wrinkles and distortions in the arc-shaped bent portion of the metal molded product. A process of correcting distortion was required. Further, in order to perform bending work by a bending machine without hindrance, the size and shape of an edge portion, an edge portion, a blanket, and the like provided around a lower portion of the mountain fold forming portion are limited. Therefore, in the roll forming method, besides the roll forming machine,
Press machine for split cutting and edge bending, etc.
Bending machine for bending of arc-shaped bends,
Processing machines that perform several post-processes, such as machines for correcting wrinkles and distortions, are required, which have reduced production efficiency and increased product costs.

[0004] In order to solve the above-mentioned problem of the roll forming method, a press forming method is conceivable. In this press forming method, 1) buckling of a mountain bent portion in a drawing step;
2) The inclination of the mountain-folded flange after the close contact due to this buckling,
3) It has become clear that there are three problems, that is, the shape of the top of the mountain-folded flange portion is broken by the division of the formed member.

[0005]

SUMMARY OF THE INVENTION The present invention is to manufacture the above-mentioned metal molded product by the above-mentioned roll forming method. In order to solve the above three problems, the present invention provides a method of forming a metal molded product into a molded member. A ridge having an arc-shaped bent portion that can fit and arrange both inner peripheral surfaces of the mountain-folded portion to be provided is provided on the lifter of the press, and furthermore, a shaping process capable of forming one or more metal molded products on the original plate is performed. The method is characterized in that the molding member is formed by piercing a relief hole.

That is, according to the present invention, a molded member obtained by shaping a base plate and forming a relief hole is pressed and held between a blank holder and a first die having an arc-shaped bent portion. A step (first drawing) of press-forming a formed member with a first drawing punch and a first die having an arcuate bent portion (first drawing process), and an arcuate bent portion provided on a lifter. The outer peripheral surface of the protruding ridge having the inner peripheral surface of the protruding portion formed on the molded member is fitted to the molded member, and then a second portion having a corner similar to the outer peripheral surface of the protruding ridge of the lifter is provided. Pressing and holding the formed member with the die, and then pressing a second drawing punch having a corner similar to the outer peripheral surface of the ridge of the lifter from the surface of the protrusion of the formed member to form a crease portion Process (second drawing) And a method for press-molding a metal molded product including a step of forming a mountain-folded flange portion by closely contacting the mountain-folded portion, and the present invention is capable of forming a plurality of metal molded products on an original plate. The first drawing process and the second drawing process are performed on a molded member formed by performing a round shaping process and forming a relief hole, thereby forming a mountain-folded portion on the molded member, and then forming the mountain-folded portion. Trimming and cutting off the peripheral portion, leaving an edge portion for forming an edge portion along the outer periphery of the portion, and leaving a blanket portion having a pin hole and an edge portion along the inner periphery of the mountain-folded portion and an inner peripheral portion Is trimmed, and furthermore, the ridges of the molding member are arranged between the close-fitting blades, and the ridges of the forming member are pressed tightly by the close-contacting blades to form a ridge-folding flange portion. Up the molded part It is arranged between the blade and the lower curved blade, the outer peripheral edge of the mountain-folded flange portion of the molded member is press-bended by the upper curved blade and the lower curved blade to form an edge portion, and then the molded member is divided. To form a plurality of metal moldings.

By such a press forming method, it is possible to prevent the buckling of the mountain-folded portion in the drawing step, and also to prevent the top of the obtained mountain-folded flange from being deformed, so that the vertical and arc-shaped portions are formed. One or a plurality of metal moldings having bent mountain-folded flange portions can be simultaneously formed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The metal molded product 1 having the arcuately bent flange portion 3 shown in FIG. 1 is manufactured by the following steps. First, a case where two metal molded products 1 are formed simultaneously will be described. As shown in FIG. 7, the original plate 1-3 is shaped and the relief hole 1-2 is provided to form the molded member 1-1.

Next, as a first drawing process, the formed member 1-1 is placed in a blank holder 9- of a press shown in FIG.
1, 9-2 and a first die 7- having an arcuate bent portion
1, 7-2. Then, the first drawing punch 8 having the arc-shaped bent portion and the first die 7-1,
7-2, the formed member 1-1 is press-formed to form the protruding portion 10 shown in FIG.

Next, as a second drawing process, the outer peripheral surfaces of the ridges 15-1 and 15-2 having an arc-shaped bent portion provided on the lifter 13-1 on the pad 14 of the press shown in FIG. Then, the inner peripheral surfaces of the protrusions formed on the molded member are aligned with each other, the molded members are fitted together, and then the second dies 11-1 and 11 having corners similar to the outer peripheral surfaces of the protrusions of the lifter are formed.
9 by pressing and holding the formed member at -2, and then pressing the second drawing punch 12 having a corner similar to the outer peripheral surface of the ridge of the lifter from the surface of the protrusion of the formed member. Are formed as shown in FIG.

Next, peripheral trimming cutting is performed. In this step, as shown in FIG. 4, the molded member 1-1 having the mountain folds 3-1 and 3-2 shown in FIG. 9 is moved along the outer peripheral surface of the mountain folds 3-1 and 3-2. The peripheral portion 16 is left with the upper cutting blade 21
1, 21-2, and the inner peripheral portion 17 is trimmed and cut along the inner peripheral surface of the mountain fold, leaving the inner peripheral edges 5-3, 5-4 and the blanket 6 having pin holes. Then, the molded member 1-1 of FIG. 10 is formed. The shape and size of the inner peripheral edge portions 5-3 and 5-4 and the blanket 6 are not limited as in the case of roll forming, and are formed in any shape and size.

Next, close contact molding of the crease portion of the molded member is performed. In this molding, as shown in FIG. 5, close curved blades 18-1 and 18-2 are arranged on both sides of the bent portions 3-1 and 3-2 of the molded member 1-1, and the pressed curved blade is pressed. Thus, the mountain-folded portion is closely attached to form the mountain-folded flange portion 3 shown in FIG. Next, the edge is bent. In this step, as shown in FIG. 6, the formed member 1-1 on which the mountain-folded flange portion 3 closely adhered in the pressed state shown in FIG. 5 is formed by the upper curved blade 19-1 and the lower curved blade 19-2. The edge part 4 is formed by performing a bending process according to, and a formed member shown in FIG. 12 is formed.

Next, the central connecting portion of the molded member shown in FIG. 12 is cut in the longitudinal direction, thereby forming a pair of metal molded products 1 each having an arc-shaped bent mountain flange shown in FIG. In each of the above steps, the present invention has the following effects. First, a relief hole is provided when shaping the molded member. As shown in FIG. 8, the other end of the mountain-folded portion formed from the end of the molded member is terminated with the relief hole. Thereby, when dividing into a pair of metal moldings 1 in the final step, since it is not necessary to cut the mountain-folded flange portion, it is possible to avoid the third problem of the collapse of the shape of the mountain-folded flange portion top. .

In the second drawing, the ridges 15-1 and 15-2 having the arc-shaped bent portions are provided on the lifter, so that the mountain folds 3-1 and 3-2 of the formed member buckle. Without being formed, it is formed almost perpendicularly along the outer peripheral surface of the second dies 11-1 and 11-2. This can solve the first problem caused by the press forming, the buckling of the mountain bent portion in the second drawing process.

Further, in the second drawing, a vertical fold portion that is not buckled is press-formed. Therefore, in this close contact forming, a ridge fold flange portion after the close contact due to buckling, which is the second problem. Can be resolved.
That is, in the second drawing, when the smooth lifter 13-2 without the ridge shown in FIG. 14 is used, the buckling 3--3, 3-4 formed on the ridge breaks 3-3, 3-4.
5, 3-6 occur. After that, even if the buckled mountain-folded portion is subjected to close contact processing, a mountain-folded flange portion 3-4 which falls on the buckled side is formed as shown in FIG. However, the ridges 15-1, 1 of the arcuate bent portion shown in FIG.
In the case where a lifter provided with 5-2 is used, as shown in FIG.
1 is formed.

[0016]

As described above, the present invention has been described with respect to the case where two metal molded products are formed at the same time. However, the present invention is not limited to this case. One or three or more metal molded products may be formed simultaneously. Applicable to the present invention. As described above in detail, the above-mentioned three problems are solved by the press forming method of the present invention, so that a metal molded product having a mountain-folded flange portion bent in an arc shape can be formed by the press forming method. became. Specifically, the present invention does not limit the size and shape of the edge, edge, and blanket provided around the periphery of the mountain-folded flange portion of the metal molded product, and has wrinkles and distortions in the arc-shaped bent portion. Thus, a press forming method of a metal molded product having an arc-shaped bent flange portion that does not cause cracks can be performed, thereby improving production efficiency and reducing product price.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a metal molded product having a mountain-folded flange portion bent in an arc shape of the present invention.

FIG. 2 is a cross-sectional view of a first drawing process for forming a protruding portion on a formed member.

FIG. 3 is a cross-sectional view of a second drawing step of forming a mountain-folding protrusion on a formed member using a lifter having a protrusion.

FIG. 4 is a cross-sectional view of a step of trimming and cutting a peripheral portion of a bent portion of a molded member.

FIG. 5 is a cross-sectional view of a step of performing close contact pressing on a peripheral portion of a mountain bent portion of a molded member.

FIG. 6 is a cross-sectional view of a step of press-bending an edge portion around a mountain bent portion of a formed member.

FIG. 7 schematically shows an original plate which has been formed and provided with a relief hole.

FIG. 8 is a schematic perspective view of a molded member on which a protruding portion has been formed after the completion of the first drawing.

FIG. 9 is a schematic perspective view of a formed member in which a mountain-folded portion has been formed after the completion of the second drawing.

FIG. 10 is a schematic perspective view of a molded member in which a mountain-folded portion has been formed after trimming and cutting has been completed.

FIG. 11 is a schematic perspective view of a molded member on which a mountain-folded flange portion is formed after close contact pressing.

FIG. 12 is a schematic perspective view of a formed member in which a mountain-folded flange portion is formed after press bending of an edge portion.

FIG. 13 is a schematic perspective view of a pair of divided metal molded products each having a mountain-folded flange portion and an arc-shaped bent portion.

FIG. 14 is a cross-sectional view of a second drawing process in which a mountain-folded protruding portion is formed on a formed member using a smooth lifter.

FIG. 15A shows a section of a vertically bent flange portion, and FIG. 15B shows a section of a flange portion that has fallen to the buckled side.

FIG. 16 is a perspective view schematically showing a conventional metal molded product having an arc-shaped bent mountain flange portion.

FIG. 17 is a perspective view schematically showing a conventional roll forming apparatus for forming a metal molded product having a mountain-folded flange portion bent in an arc shape.

18A is a cross-sectional view of the roll forming apparatus of FIG. 17 taken along line AA, FIG. 18B is a cross-sectional view of the roll forming apparatus of FIG. 17 taken along line BB, FIG. 18C is an enlarged cross-sectional view of a portion C of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Metal molding 1-1 ... Molded member 1-2 ... Relief hole 1-3 ... Original plate 2 ... Arc-shaped bent part 3 ... Mountain bent flange part 3-1 and 3-2 ... Normal mountain bent part 3-3 3-4: buckled mountain bent portion 3-5, 3-6: buckled portion 4: edge portion 5-1; 5-2: outer peripheral edge portion 5-3, 5-4: inner peripheral edge portion 6: Blanket 7-1, 7-2 First die 8 First draw punch 9-1, 9-2 Blank holder 10 Projection 11-1, 11-2 Second die 12 Second Drawing punch 13-1 ... lifter with protrusion 13-2 ... smooth lifter 14 ... pad 15-1, 15-2 ... protrusion ridge 16 ... outer circumference 17 ... inner circumference 18-1 and 18-2 ... close contact Curved blade 19-1 Upper curved blade 19-2 Lower curved blade 20-1, 20-2 Forming roll 21-1, 21-2 Upper cutting blade 31 Metal forming 32 ... arcuate bent portion 33 ... outward bending flange portion 34 ... edge part 35-1 and 35-2 ... edge 36 ... blanket 40-1,40-2,41-1,41-2,41-3 ...
Forming roll S ... Strip material

Claims (2)

(57) [Claims] 1. A method for press-forming a metal molded product having a mountain-shaped bent flange portion bent in an arc shape, wherein in a first drawing process, a forming member is formed by a blank holder and a first die having an arc-shaped bent portion. In the step of pressing and holding between the first and the first die and the first die having an arc-shaped bent portion, the forming member is press-formed to form a projecting portion, and in the second drawing process, On the outer peripheral surface of the ridge having an arc-shaped bent portion provided on the lifter,
The inner peripheral surface of the protrusion formed on the molded member is aligned with the molded member, and then the molded member is engaged with the molded member. Then, the molding is performed with a second die having a corner portion similar to the outer peripheral surface of the ridge portion of the lifter. Forming a mountain fold by pressing and holding the member, and then pressing a second drawing punch having a corner similar to the outer peripheral surface of the ridge of the lifter from the surface of the protrusion of the molding member. A method for press-molding a metal molded product having a mountain-folded flange portion bent in an arc shape, comprising: 2. A method for press-forming a metal molded product having a mountain-shaped bent flange portion bent in an arc shape, the method comprising blanking the metal molded product on an original plate and forming a relief member by forming a relief hole. In the first drawing, the forming member is pressed and held between a blank holder and a first die having an arc-shaped bent portion, and a first drawing punch having an arc-shaped bent portion and the first Forming a protruding portion by press-forming the formed member with a die, in a second drawing process, forming the formed member on the outer peripheral surface of a ridge having an arc-shaped bent portion provided on a lifter. The inner peripheral surfaces of the protruding portions are aligned to fit the molded member, and then the molded member is pressed and held by a second die having a corner similar to the outer peripheral surface of the ridge portion of the lifter, Followed by Forming a mountain-folded portion by pressing a second drawing punch having a corner portion similar to the outer peripheral surface of the ridge portion of the lifter from the surface of the projecting portion of the molding member; A trimming cut is performed on a peripheral portion while leaving an edge portion for forming an edge portion along, and a trimming cut is performed on an inner peripheral portion while leaving a blanket portion having a pin hole and an edge portion along an inner circumference of the mountain-folded portion. Disposing the mountain-folded portion of the molding member between closely-contacted curved blades, and pressing the mountain-folded portion of the molded member by the close-contacted curved blade to form a mountain-folded flange portion; The formed member having a portion is disposed between an upper curved blade and a lower curved blade, and the outer peripheral edge of the mountain-folded flange portion of the molded member is press-bent by the upper curved blade and the lower curved blade. Before and after forming the edge Press-forming method of the metal mold having a mountain folded flange portions are bent in an arc shape to step dividing the described bending the shaped member formed with a flange portion on the pair of the metal molding in that it consists, characterized.