KR101731251B1

KR101731251B1 - A apparatus for forming flange parts of automobile

Info

Publication number: KR101731251B1
Application number: KR1020160030776A
Authority: KR
Inventors: 이정관
Original assignee: (주)고이테크
Priority date: 2016-03-15
Filing date: 2016-03-15
Publication date: 2017-05-11

Abstract

The present invention relates to an automobile injection part flange molding device capable of producing accurate injection molding parts without a post-process and a further process by a spring back by removing residual stress during a flange molding process by a molding device configuration that can achieve the same effects as the draw molding The present invention relates to a method of forming a flange for an auto body part, comprising: a lower mold supporting a lower surface of a molding panel; An upper mold disposed above the lower mold and pressing the upper surface of the molding panel; A lower pad portion that is vertically movably installed on a side of the lower mold and grips a lower surface of a portion to be flange-formed in the molding panel; An upper pad unit vertically movably provided on a side of the upper mold for pressing and deforming the lower surface of the molding panel in a state of gripping an upper surface of the portion to be flanged; A panel take-out part installed below the lower pad part and pushing up the flange-shaped part of the molding panel upward to bring it into a take-out state; A first power supplier coupled to the panel take-out unit and providing power for moving the panel take-out unit upward; And a second power supplier coupled to the upper pad unit and configured to press the panel takeout unit downward with a greater force than the first power retaining unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a flange forming apparatus,

The present invention relates to a flange forming apparatus for automobile parts, and more particularly, to a flange forming apparatus for a car spare part, which removes residual stress during a flange forming process, And more particularly, to an automobile spare part flange forming apparatus and method that can accurately produce a spare part without using the apparatus.

Automobile body panels and other parts are usually produced by press molding. Of course, such a secondary part is subjected to a series of processes such as blanking, one or more drawings, piercing, restriking, and triming depending on the shape.

In this case, when the bending or flanging process is performed, the springback phenomenon due to the elastic restoration of the steel sheet is experienced, so that the formed panel shape deviates from the shape of the mold. The springback phenomenon is resiliently reshaped in order to maintain static parallelism due to the residual stress in the plate when the external force is released due to the release of the constraint by the mold in the plate material forming process.

The springback is a typical molding defect that occurs during plate material molding by press with wrinkling and crack. The springback may degrade the dimensional accuracy of the product, which may lead to quality deterioration, poor appearance between parts, and poor assembly.

In addition, since the weight reduction of products and the shape of product are sophisticated and complicated according to the diversification of design requirements due to energy saving and demand for improvement of collision performance as recently as recently, shape precision becomes more important, light weight and improvement of performance are considered simultaneously In the case of increasing the strength of the steel sheet material, the influence of the springback is increasing.

1, the conventional flange forming apparatus 1 has a structure in which the flange forming unit 30 is provided on the side of the panel 2 in a state where the panel 2 is simply fixed on the upper and lower molds 10 and 20 There is a problem in that a large amount of residual stress is left in the molding process, thereby causing a large springback phenomenon.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a molding apparatus capable of obtaining the same effect as the draw molding, And to provide a flange forming apparatus and a method for manufacturing the same.

According to an aspect of the present invention, there is provided an apparatus for forming a flange for an auto body part, comprising: a lower mold supporting a lower surface of a molding panel; An upper mold disposed above the lower mold and pressing the upper surface of the molding panel; A lower pad portion that is vertically movably installed on a side of the lower mold and grips a lower surface of a portion to be flange-formed in the molding panel; An upper pad unit vertically movably provided on a side of the upper mold for pressing and deforming the lower surface of the molding panel in a state of gripping an upper surface of the portion to be flanged; A panel take-out part installed below the lower pad part and pushing up the flange-shaped part of the molding panel upward to bring it into a take-out state; A first power supplier coupled to the panel take-out unit and providing power for moving the panel take-out unit upward; And a second power supplier coupled to the upper pad unit and configured to press the panel takeout unit downward with a greater force than the first power retaining unit.

According to the present invention, the upper pad portion and the lower pad portion descend together in the process of descending for flange forming of the molding panel. In the process of ascending after the completion of the flange forming, the upper pad portion rises first, It is preferable to rise together with the carry-out portion.

Further, in the present invention, when the upper mold starts to rise after completion of flange forming, the second power providing unit presses the panel take-out unit with a smaller force than the first power supply so that the panel take-out unit is gradually raised desirable.

According to the flange forming apparatus of the present invention, it is possible to completely eliminate the residual stress in the flange forming process while using the high-strength steel plate, and to perform the flange forming of the car parts in which deformation due to springback hardly occurs after molding.

1 is a view showing a structure of a conventional flange forming apparatus.
FIGS. 2 to 7 are views showing the configuration of a flange forming apparatus for a vehicle automotive part according to an embodiment of the present invention, and the flange forming processes of the automotive parts using the same.

Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3, the flange forming apparatus 100 for an automotive vehicle part according to the present embodiment includes a lower mold 110, an upper mold 120, a lower pad unit 130, an upper pad unit 140 A panel take-out unit 150, a first power providing unit 160, and a second power providing unit 170.

2 and 3, the lower mold 110 supports the lower surface of the molding panel 2 and supports the lower surface of the molding panel 2 together with the upper mold 120 in the molding process. And is deformed into a specific shape by pressing. 2, the upper mold 120 is installed at a position symmetrical to the lower mold 110 on the upper side of the lower mold 110, Lt; / RTI >

In this embodiment, since the lower mold 110 and the upper mold 120 can use common molds, a detailed description thereof will be omitted.

2, the lower pad part 130 is installed on the side of the lower mold 110 so as to be vertically movable, and the lower pad part 130 is provided on the side of the lower mold part 110, 2a. That is, the lower pad part 130 is raised to the same position as the shape of the lower mold 110 at the initial stage of the flange forming process. When the molding panel 2 is seated on the lower mold 110, The pad portion 140 and the portion 2a of the molding panel 2 to be flanged are gripped.

Then, in the process of forming the flange by the upper pad unit 140, the upper pad unit 140 moves downward to catch the flange-formed part 2a. The residual stress of the flange-formed portion 2a is removed by the function of the lower pad portion 130 and the upper pad portion 140, and the springback phenomenon is prevented.

Accordingly, the lower pad unit 130 is further provided with a driving unit (not shown) for driving the lower pad unit 130 in the vertical direction.

2, the upper pad unit 140 is installed on the side of the upper mold 120 so as to be vertically movable. The upper pad unit 140 is mounted on the side of the upper mold 120, And is a constituent element for pressing and deforming the upper surface while gripping it. That is, as described above, the upper pad unit 140 is a component that directly handles the flange forming together with the lower pad unit 130. The upper pad unit 140 is a component that can move up and down in the vertical direction at the side of the upper mold 120, (Not shown in the drawing).

The upper pad 140 and the lower pad 120 may be formed in the upper and lower sides of the molding panel 2 in a process of being lowered for flange forming of the molding panel 2, And the molding operation is performed while descending together. However, after the flange molding is completed, only the upper pad unit 140 is moved upward together with the upper mold 120, and the lower pad unit 130 is moved upward together with the panel carry-out unit 150 .

2, the panel take-out unit 150 is installed vertically up and down on the lower side of the lower pad unit 130. As shown in FIG. 5, the panel take- And the flange-shaped portion 2b of the flange portion 2b is pushed upward to bring it into a take-out state. Therefore, the panel take-out unit 150 is moved to the lower side in the molding process, and after standing up, the panel take-out unit 150 is raised while pushing up the flange-formed portion 2b upward. Then, the molding panel 2 on which the molding operation has been completed is raised to be in a dischargeable state.

However, in the present embodiment, when the panel take-out unit 150 is lifted for carrying the panel, the upper mold 120 and the upper pad unit 140 are moved upward and then moved upward by at least the minimum spacing distance It should rise after starting. Here, the minimum spacing distance is a distance between the panel and the upper mold 120 during the lifting process of the molding panel 2, and is at least 1 mm or more. This is because the panel 2 may be deformed if the panel take-out unit 150 is simultaneously raised or elevated simultaneously with the upper mold 120 or the upper pad unit 140.

2, the first power supplier 160 is installed in association with the panel take-out unit 150 and provides power for moving the panel take-out unit 150 upward and downward Lt; / RTI > The first power supplier 160 may have a variety of structures such as a gas spring, and a structure capable of driving the panel take-out unit 150 up and down is sufficient.

2, the second power supplier 170 is coupled to the upper pad unit 140, and the panel power take-off unit 150 is connected to the first power supplier 160 It is a component that presses downward with large force. 5, when the upper mold 120 starts to rise after the completion of the flange forming, the second power providing part 170 is moved to the upper side of the panel 100 with a smaller force than the first power providing part 160, It is preferable to press the carry-out part 150 so as to control the panel carry-out part 150 to rise gradually.

Hereinafter, the process of flange forming using the molding apparatus 100 according to the present embodiment will be described in detail with reference to the accompanying drawings.

First, as shown in Fig. 2, the step of seating the molding panel 2 proceeds. In this step, the lower mold 110 and the lower pad unit 130 are set to the panel seating position and wait. Here, the panel seating position means that the lower pad unit 130 is positioned so as to coincide with the extension line of the shape of the lower mold 110. When the molding panel 2 is seated in this state, The lower surface of the upper mold 2 is in contact with the lower mold 110 and the lower pad 130. Of course, at this stage, the upper mold 120 and the upper pad unit 140 are spaced apart from each other by a sufficient distance in order to smoothly load and prevent the molding panel 2 from interfering with each other.

As shown in FIG. 2, the panel take-out unit 150 may maintain the elevated state as it is in the process of removing the panel 2 in the previous process, or may move to the lower side and wait.

Next, as shown in FIG. 3, a step of firmly grinding the flange forming portion 2a of the molding panel 2 is performed by using the lower pad portion 130 and the upper pad portion 140. FIG. Therefore, the upper mold 120 and the upper pad 140, which have been moved upward, are lowered to press the upper surface of the molding panel 2 and the upper surface of the flange deformed portion 2a, respectively.

Of course, at this time, the second power supplier 170 presses the panel take-out unit 150 downward and sufficiently moves it. This is to prevent the panel carry-out part 150 from interfering with the lower pad part 130 or the upper pad part 140 in the process of forming the flange deformed part 2a.

Next, as shown in Fig. 4, the step of flange-forming the flange-forming portion 2a of the molding panel 2 proceeds. The upper pad portion 140 and the lower pad portion 130 move downward relative to the upper mold 120 and the lower mold 110 while the flange molding portion 2a is in a door state, .

In this embodiment, since the upper pad portion 140 and the lower pad portion 130 are formed by flange molding with the flange forming portion 2a being firmly placed in the door state little by little, as in the case of a kind of draw forming, No residual stress is left in the process. Therefore, even if the molds 110 and 120 are removed after completion of the molding, the springback phenomenon does not occur.

Next, the step of preparing the molded article is carried out. At this stage, as shown in FIG. 5, the upper pad unit 140 and the lower pad unit 130 are moved upward so as not to interfere with the ascending process of the panel discharging unit 9150.

Then, as shown in Fig. 6, the molded article discharging step proceeds. In this step, the upper mold 120 starts to rise first, and the panel discharging unit 150 rises while the upper mold 120 is lifted at a minimum spacing distance, and the flange deformation The part 2b is pushed upward. At this time, it is preferable to lift all the surfaces of the flange deforming portion 2a while contacting them at the same time, because deformation can be prevented.

Then, as shown in Fig. 7, the external carry-out step of the molded article 2 proceeds. At this stage, the molded article 2 completely separated from the lower mold 110 by the panel discharging unit 150 is taken out to the outside by using a finger, a vacuum adsorption module 180 or the like.

100: Flange forming device for automobile parts according to an embodiment of the present invention
110: lower mold 120: upper mold
130: lower pad part 140: upper pad part
150: panel take-out unit 160: first power supplier
170: Second power supply

Claims

A lower mold supporting the lower surface of the molding panel;
An upper mold disposed above the lower mold and pressing the upper surface of the molding panel;
A lower pad portion that is vertically movably installed on a side of the lower mold and grips a lower surface of a portion to be flange-formed in the molding panel;
An upper pad unit vertically movably provided on a side of the upper mold for pressing and deforming the lower surface of the molding panel in a state of gripping an upper surface of the portion to be flanged;
A panel take-out part installed below the lower pad part and pushing the flange-shaped part of the molding panel upwards to bring it into a take-out state;
A first power supplier coupled to the panel take-out unit and providing power for moving the panel take-out unit upward;
And a second power supplier coupled to the upper pad unit and configured to press the panel take-out unit to a lower side with a greater force than the first power retaining unit.

The method according to claim 1,
Wherein the upper pad portion and the lower pad portion are lowered together during a lowering process for forming a flange of the molding panel,
Wherein the upper pad portion is raised first and the lower pad portion is raised together with the panel take-out portion in a process of rising after completion of the flange forming.

3. The apparatus of claim 2, wherein the second power providing unit comprises:
Wherein when the upper mold starts to rise after completion of the flange forming, the panel take-out unit is pressed with a smaller force than the first power retaining unit so that the panel take-out unit gradually rises.