KR20160082145A

KR20160082145A - Multi stage molding method and moldong apparatus of reinforcement cross bar for vehicle

Info

Publication number: KR20160082145A
Application number: KR1020140194721A
Authority: KR
Inventors: 김창현; 이장우; 김대훈; 홍명표
Original assignee: 주식회사 광진정밀
Priority date: 2014-12-31
Filing date: 2014-12-31
Publication date: 2016-07-08

Abstract

The present invention relates to a multistage molding method for a reinforcing cross bar for a vehicle and a molding device for the same capable of reducing manufacturing costs and remarkably improving productivity by manufacturing the reinforcing cross bar, which reinforces strength by being installed between a rear floor component and a center floor component of a vehicle body, in a multistage bending-molding method by applying a digital mold manufacturing technology. The multistage molding method for the reinforcing cross bar includes: a step of forming multiple holes in a rectangular plate (2); a step of forming a scoop-shaped first molded object (10) by forming a first bent unit (11), a second bent unit (12), and a third bent unit (13) inward in an identical direction in a longitudinal direction of the plate (2); and a step of forming a square-shaped second molded object (20) by pressing an upper frame (50) wherein a groove unit (51) facing a lower frame (30) is formed after inserting and seating the first molded object (10) into the lower frame (30) wherein a groove unit (31) corresponding to a lower part of the first molded object (10) is formed and inserting a shape forming frame (40) inside the first molded object (10).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage molding method of a reinforcing crossbar for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a composite multi-stage molding method and a molding apparatus for a vehicle reinforcing crossbar, and more particularly to a method of molding a reinforcing crossbar, which is assembled between a rear floor part of a vehicle body and a center floor part, A method of molding a composite multi-step bending molding method of a vehicle reinforcing crossbar which is capable of reducing the manufacturing cost and improving the productivity, and a molding apparatus therefor.

Recently, the most important issue in the automobile production industry is the increase of hot foaming and roll foaming products due to the development of lightweight and high strength steel and the difficulty of forming. The feature of roll forming is that it is easy to calibrate the spring back because of its excellent moldability because it is gradually formed through several rolls. Therefore, it is very important to use the high strength steel sheet, super high strength steel sheet, door rail, bumper beam, seat rail, Has been widely used in manufacturing.

However, in order to perform roll forming, a separate roll form large facility is required, which is disadvantageous in terms of productivity and cost of production. Especially, in the case of Reinforcement cross bar product, there is a functional hole inside the product, so there is a separate need for pierce hole and trimming through additional laser cutting after roll forming, It is inevitable to reduce the manufacturing cost and improve the productivity through the new product manufacturing method.

Such a conventional roll forming method has been disclosed by a non-cost contact angle pipe technique in which a steel sheet is bended using a roll molding machine of Registration No. 10-0320754 and is fitted to each other. Although the above-described roll forming forming method is advantageous for mass production of small product types, it is difficult to quickly respond to various demands of customers in the modern society in recent years, and it is necessary to increase the number of expensive roll forming equipments Are generated.

Patent No. 10-0320754

The present invention provides a composite multi-stage molding method for a vehicle reinforcing crossbar and a molding apparatus for the same which are provided to solve the problems of the related art, and particularly to a reinforcing crossbar assembled between a vehicle body rear floor part and a center floor part, A multi-step bending molding method using a digital mold manufacturing technology, and thereby a manufacturing cost is reduced and a productivity is innovatively improved.

In order to accomplish the above object, the present invention provides a method of forming a multi-stage composite crossbar of a vehicle, comprising the steps of: forming a plurality of holes in a rectangular plate member; The first bent portion 11, the second bent portion 12 and the third bent portion 13 are formed inwardly in the same direction,

A step of placing a primary molding 10 in a lower frame 30 having a groove 31 corresponding to a lower side of the primary molding 10, The shape forming mold 40 is inserted into the primary molded product 10 and then the upper mold 50 having the groove 51 facing the lower mold 30 is pressed to form a rectangular secondary molding 20 And a step of forming a metal layer on the substrate.

The composite multi-stage molding apparatus for a vehicle reinforcing crossbar according to the present invention is characterized in that a rectangular plate member 2 having a plurality of holes 3 formed therein is provided with a first bent portion 11, a second bent portion 12, The bent portion 13 is formed inwardly in the same direction,

A bending blade member 60 and a bending blade member 70, which are provided to form a primary molded article 10 of a " shape " A lower frame 30 formed with a groove 31 corresponding to a lower side of the primary molding 10 to insert and receive the primary molding 10; A shape forming mold 40 inserted into the primary molding 10; A groove 51 facing the lower frame 30 is formed and spaced from the upper portion of the lower frame 30 so that the primary molding 10 is formed into a rectangular secondary molding 20, And an upper frame (50) which is operated to move up and down toward the upper frame (30).

The composite multi-stage molding method and the molding apparatus for a vehicle reinforcing crossbar provided in the present invention can be manufactured by combining a digital mold manufacturing technique and a reinforced crossbar by a composite multi-step bending molding method, thereby eliminating processes such as conventional roll forming method and laser hole processing Therefore, it is possible to reduce the manufacturing cost and improve the productivity, and it is suitable for small quantity production of various kinds according to the various demands of the customers.

1 is a perspective view of a plate material having holes according to the present invention;
FIG. 2 is a view showing an example of the first bent section forming state of the present invention
Fig. 3 is a view showing an example of the second bent section forming state of the present invention
4 is a view showing an example of the third bent section forming state of the present invention
5 is a sectional view of the lower mold of the present invention in which a primary molded product is inserted
Fig. 6 is a sectional view of a state where a shape-forming mold is inserted into the primary molding of the present invention
7 is a sectional view of a state where the upper mold of the present invention is lowered to form a secondary molded product
8 is a sectional view and a perspective view of a secondary molded product of the present invention
Fig. 9 is a cross-sectional view of the bent plate according to the descending distance of the bending blade member of the present invention, wherein (a) is a right angle machining sectional view, (b) is an acute angle machining sectional view, and Fig. 9 is an obtuse machining sectional view.

The technical means of the present invention will be described in more detail as follows.

The present invention provides a composite multi-stage molding method for a vehicle reinforcing crossbar and a molding apparatus thereof, which are assembled between a rear floor part of a vehicle body and a center floor part of an automobile to form a reinforced crossbar reinforcing rigidity, So that the manufacturing cost can be reduced and the productivity can be improved.

In order to carry out the composite multi-step molding method of the vehicle reinforcing crossbar of the present invention, a plurality of holes 3 are formed in the rectangular plate member 2 as shown in Fig. The plate member 2 is formed of a metal material such as a steel plate and the holes 3 formed in the plate member 2 are used for various reasons such as tool passing for passing a welding gun and wire drawing for wiring of a wire harness It is mainly formed by punching or laser processing.

The reinforced crossbar is mainly used in the form of a rectangular cross section so as to have excellent reinforcing properties, workability and usability. 2 to 4, the first bent portion 11 and the second bent portion 12 are formed along the longitudinal direction of the plate material 2, since the plate material 2 can not be completed in a rectangular shape by the bending method alone. And the third bent portion 13 are formed inward in the same direction,

&Lt; / RTI > to form a primary molded article 10 of the "

The first bending portion 11, the second bending portion 12 and the third bending portion 13 of the primary molded product 10 are successively formed by the single bending piece member 60 and the bending blade member 70 However, the bending piece member 60 and the bending blade member 70 may be provided for each process. The bending process is performed by combining a digital mold manufacturing technique so that the bending process is performed at a constant value according to the value set in the bending device.

The first bending portion 11, the second bending portion 12 and the third bending portion 13 are formed at an acute angle, a right angle or an obtuse angle according to a required design specification. The adjustment of the bending angle is determined according to the falling distance of the bending blade member 70 which is inserted into the groove portion 62 formed in the bending member 60 as shown in FIG.

9 (1), the bending angle of the plate member 2 is made obtuse by shortening the falling distance of the bending blade member 70, and the bending blade member 70 So that the bending angle of the plate material 2 is formed at an acute angle by increasing the falling distance of the bending blade member 70 as shown in Fig. 9 (3) .

Since the bending angle of the first bending portion 11, the second bending portion 12 and the third bending portion 13 can be adjusted by adjusting the descending distance of the bending blade member 70, It is possible to prevent the occurrence of springback to occur. That is, the present invention is designed and manufactured so as not to cause springback of a molded product. Here, the setting of the falling distance and the bending angle of the bending blade member 70 varies depending on the thickness of the plate material 2, and accordingly, the setting value needs to be adjusted.

When the primary molded product 10 is molded, a lower mold 30, a shape forming mold 40, and an upper mold 50 are prepared to mold the primary molded product 10 into a square shape.

As shown in FIG. 5, the primary molding 10 is inserted into the lower frame 30 having the groove 31 corresponding to the lower side of the primary molding 10 and inserted into the inner side of the primary molding 10 The molding die 40 is inserted in the direction of the opening end face of the primary molding 10 and then the upper die 50 with the groove 51 facing the lower die 30 is formed as shown in Fig. Thereby forming a secondary molded product 20 of

The secondary molding 20 is formed in a rectangular shape in cross section, and each bent portion is formed by mixing and applying rectangular, acute, and obtuse angles according to required design specifications. In the present invention, as shown in FIG. 8, And both upper bent portions are formed in the form of an obtuse angle and an acute angle, respectively. It is also possible to prevent the occurrence of springback in the molding process of the primary molded product 10 and to control the bending angle of the groove portion 51 formed in the upper mold 50 in the molding process of the secondary molded product 20, So that the secondary molded product 20 molded in a square shape in this way is used in the molded form without the need of welding.

Since the secondary molding 20 can eliminate the conventional processes such as the roll forming method and the laser hole processing, it is possible to reduce the manufacturing cost and improve the productivity, and is suitable for producing a small quantity of various products according to various demands of customers. It is possible to quickly respond to the shape, thereby further increasing the productivity.

Referring to the molding method and the drawings described above, the bending blade member 60, the bending blade member 70, the lower frame member 70, (30), a shape forming mold (40), and an upper frame (50).

The bending piece member 60 and the bending blade member 70 are formed in a rectangular plate member 2 having a plurality of holes 3 along a longitudinal direction along a first bending portion 11, a second bending portion 12, The third bent portion 13 is formed inwardly in the same direction,

And the lower frame 30 has a groove 31 corresponding to the lower side of the primary molding 10 so that the primary molding 10 is inserted and seated The shape forming mold 40 is inserted into the primary molding 10 and the upper mold 50 is formed with a groove 51 facing the lower mold 30 and the lower mold 30 So that the primary molded product 10 is moved up and down toward the lower mold 30 so as to be formed into a rectangular secondary molded product 20. [

The first bending portion 11, the second bending portion 12 and the third bending portion 13 of the primary molded product 10 are formed by a single bending member 60 and a bending blade member 70 The bending blade member 70 is folded in succession and the bending blade member 70 is lowered into the groove portion 62 formed in the bending member 60. As a result, This is a bending method that is easy to consider even springback occurring in the molding material for forming the metal. In the molding process of the secondary molding 20, the upper frame 50 So that no springback is caused in the molded product, thereby completing the molded product which is not required to be welded.

While the present invention has been particularly shown and described with respect to a preferred embodiment thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, The present invention is not limited to the configuration and operation. That is, those skilled in the art will appreciate that many modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims. Accordingly, all such appropriate changes and modifications and equivalents may be resorted to, falling within the scope of the invention.

2: Plate 3: Hole
10: primary molding 20: secondary molding
30: Lower mold 40: Shape forming mold
50: upper frame 60:
70: Bending blade member

Claims

A step of forming a plurality of holes 3 in the rectangular plate material 2,
The first bending portion 11, the second bending portion 12 and the third bending portion 13 are formed inwardly in the same direction along the longitudinal direction of the plate material 2,

&Lt; / RTI >< RTI ID = 0.0 >
A primary molding 10 is inserted and placed in a lower mold 30 having a groove 31 corresponding to a lower side of the primary molding 10 and a molding die 40 , And then pressing the upper frame (50) formed with the groove (51) facing the lower frame (30) to form a rectangular secondary molding (20). A method of forming a multi -

The method according to claim 1,
The first bending portion 11, the second bending portion 12 and the third bending portion 13 of the primary molded product 10 are successively formed by the single bending piece member 60 and the bending blade member 70 Wherein the reinforcing crossbar is formed by bending.

3. The method of claim 2,
The first bending portion 11, the second bending portion 12 and the third bending portion 13 are disposed on the lower side of the bending blade member 70, which is inserted into the groove portion 62 formed in the bending member 60, Wherein the reinforcing crossbar is formed at an acute angle, a right angle or an obtuse angle.

The first bending portion 11, the second bending portion 12 and the third bending portion 13 are formed inwardly in the same direction in the longitudinal direction on the rectangular plate member 2 in which the plurality of holes 3 are formed,

A bending blade member 60 and a bending blade member 70, which are provided to form a primary molded article 10 of a " shape "
A lower frame 30 formed with a groove 31 corresponding to a lower side of the primary molding 10 to insert and receive the primary molding 10;
A shape forming mold 40 inserted into the primary molding 10;
A groove 51 facing the lower frame 30 is formed and spaced from the upper portion of the lower frame 30 so that the primary molding 10 is formed into a rectangular secondary molding 20, And an upper frame (50) that is operated to move up and down toward the upper frame (30).

5. The method of claim 4,
The first bending portion 11, the second bending portion 12 and the third bending portion 13 of the primary molded product 10 are successively formed by the single bending piece member 60 and the bending blade member 70 Is formed at an acute angle, a right angle or an obtuse angle in accordance with the descending distance of the bending blade member (70) which is inserted into the groove portion (62) formed in the bending belt member (60). Multistage molding device.