KR20160080465A

KR20160080465A - Mold apparatus applying pulsed current for car body panel

Info

Publication number: KR20160080465A
Application number: KR1020140192308A
Authority: KR
Inventors: 원광우; 김대근; 서종덕; 박성진; 김동권
Original assignee: 주식회사 신영
Priority date: 2014-12-29
Filing date: 2014-12-29
Publication date: 2016-07-08

Abstract

Disclosed is a mold apparatus to apply a pulsed current for a car body panel capable of easily forming a car body panel with lightweight non-metal. According to an embodiment of the present invention, the mold apparatus to apply the pulsed current for the car body panel comprises: a punch, a die, and a plurality of terminals. The punch includes a first mold unit in a shape corresponding to the shape of an upper surface of the car body panel on a lower surface thereof, and vertically moved. The die is disposed on a lower side of the punch, including a second mold unit in a shape corresponding to the shape of the lower surface of the car body panel on the upper surface thereof, and forms a car body panel with a non-metal plate when combined with the punch. The terminal is partially provided on the upper surface of the die, and a current is applied to the non-metal plate placed on the die.

Description

Technical Field [0001] The present invention relates to a pulse current applying mold apparatus for forming a body panel,

The present invention relates to a pulse current applied mold apparatus for molding a body panel.

Conventionally, steel has been widely used in the automobile industry. Recently, new materials have been actively applied to the environment and fuel efficiency. In particular, the use of lightweight non-ferrous metals, which have a lower specific gravity than steel, is increasing. For example, efforts have been made to reduce the weight of a vehicle body by manufacturing body parts using aluminum or magnesium (Mg), which is a non-ferrous metal.

However, aluminum and magnesium are difficult to mold because of low moldability and springback. Accordingly, the warm molding is applied to the non-ferrous metal by heating the parts before putting the parts into the mold or by heating the mold to heat the parts to increase the moldability.

However, there is a problem in that the method in which the component material is heated before being charged into the mold and then molded is cooled by the air during the process of putting the heated material into the mold, causing heat loss and deforming due to its own weight. In addition, since the heat of the heated mold is transferred to the component material, the contact time between the mold and the component material is short so that the component material can not be sufficiently heated.

Korean Registered Patent No. 10-1067047 (registered on September 16, 2011)

A further object of the present invention is to provide a pulse current applied mold apparatus for forming a body panel that can easily form a vehicle body panel with a lightweight nonferrous metal, thereby ensuring weight saving of the vehicle body.

A pulse current applying mold apparatus for molding a body panel according to an aspect of the present invention includes a punch, a die, and a plurality of terminals. The punch is provided with a first forming portion having a shape corresponding to the top surface shape of the vehicle body panel on the lower surface thereof, and is operated to ascend and descend. The die is disposed on the lower side of the punch, and has a second shaping portion having a shape corresponding to the bottom shape of the body panel on the upper surface thereof, and a non-ferrous metal plate is molded into the body panel when assembled with the punch. The terminal is provided on a part of the upper surface of the die to apply a current to the non-ferrous metal plate placed on the die.

According to another aspect of the present invention, the surface of the die and the punch can be coated with Teflon and insulated.

According to another aspect of the present invention, an insulating member may be provided on the surface of the die and the punch to be insulated.

According to the present invention, the non-ferrous metal plate having poor room temperature moldability is heated to increase the formability and press work, so that the body panel can be easily molded. Further, even when the shape of the body panel is complicated, the body panel can be formed without a defect part, so that a lightweight body panel of good quality can be manufactured. As the lightweight body panel thus manufactured is employed in the vehicle body, it is advantageous in ensuring the weight saving of the vehicle body.

1 is a plan view showing an example of a body panel.
Fig. 2 is a configuration diagram of a pulse current applying mold apparatus for molding a body panel according to an embodiment of the present invention for molding the body panel of Fig. 1
Figure 3 is a perspective view of the die shown in Figure 2;
4 is a perspective view of the punch shown in Fig.
5 is a plan view showing another example of a body panel.

The foregoing and further aspects will become apparent through the embodiments described with reference to the accompanying drawings. In the present specification, corresponding elements in each figure are referred to by the same numerals. In addition, if it is considered that the description of the related art may unnecessarily obscure the gist of the present invention, the description thereof may be omitted.

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

1 is a plan view showing an example of a vehicle body panel. The body panel 10 shown in Fig. 1 corresponds to a partition panel. The partition panel 10 is a part that is assembled with the reinforcement panel 20 shown in FIG. 5 to constitute a partition panel assembly. The partition panel assembly is a partitioning part that separates the interior passenger compartment of the vehicle from the trunk room. The partition panel assembly is mounted on the rear portion of the passenger compartment of the passenger compartment and serves to connect the bottom portion and the side portion of the vehicle, and also to prevent the vehicle from torsion and to ensure passenger safety.

FIG. 3 is a perspective view of the die shown in FIG. 2; FIG. 3 is a perspective view of the die shown in FIG. Is a perspective view of the punch shown in Fig.

2 to 3, a pulse current applying mold apparatus 100 for forming a body panel includes a punch 110, a die 120, and a plurality of terminals 130.

The punch 110 moves up and down with respect to the die 120. The punch 110 is connected to a movable frame (not shown) of a hydraulic or mechanical press apparatus, and can move up and down together with the movable frame when the movable frame moves up and down. The punch 110 has a structure in which a first molded portion 111 having a shape corresponding to the top surface shape of the body panel 10 is formed on the bottom surface. When the body panel 10 corresponds to the partition panel, the first forming portion 111 has a shape corresponding to the top surface shape of the partition panel.

The die 120 is disposed below the punch 110. The die 120 is released or compounded with the punch 110 in accordance with the upward or downward movement of the punch 110. The die 120 may be fixed on a stationary frame (not shown). The die 120 receives a non-ferrous metal plate P to be formed by the body panel 10, and mounts and supports the non-ferrous metal plate P. The non-ferrous metal plate (P) is a plate made of an alloy material of magnesium, aluminum, or magnesium or aluminum.

On the upper surface of the die 120, a second forming portion 121 having a shape corresponding to the lower surface of the body panel 10 is formed. The die 120 molds the non-ferrous metal plate P into the body panel 10 when assembled with the punch 110. That is, when the punch 110 is lowered and merged with the die 120, the non-ferrous metal plate P positioned between the first forming part 111 and the second forming part 121 is pressed against the first and second forming parts 111 ) 121 of the vehicle body panel 10 as shown in Fig.

The terminal 130 is provided on a part of the upper surface of the die 120 to apply a current to the non-ferrous metal plate P placed on the die. The terminal 130 may be formed in a rectangular block shape and inserted into the die 120, or may be formed in a plate shape so as to surround the surface of the die 120. The terminal 130 may be electrically connected to an external power supply 140. The power source 140 may be a DC power supply or an AC power supply. The power supply device 140 may be a device for transmitting a high voltage so that the non-ferrous metal plate P can be sufficiently heated. The terminal 130 may be made of gold (Au), copper (Cu), nickel (Ni) or the like having good electrical conductivity to minimize energy loss. When a current is applied to the terminal 130, the non-ferrous metal plate P is heated by flowing electricity also to the non-ferrous metal plate P which is in contact with the terminal 130.

According to the pulse current applied mold apparatus described above, since the non-ferrous metal plate material having poor room temperature moldability is heated to increase the moldability and press work, the body panel 10 can be easily formed. Further, even when the shape of the body panel 10 is complicated, the body panel 10 can be formed without a defective portion, and can be manufactured as a lightweight body panel of good quality. The use of such a body panel 10 for a vehicle body can be advantageous for ensuring the weight saving of the vehicle body.

According to another aspect of the present invention, an insulating member 150 may be provided on the surface of the punch 110 and the die 120 to be insulated. The insulating member 150 may be a Teflon tape, a polyvinyl chloride (PVC) sheet, a neoprene (CR) sheet, or the like. Even if the punch 110 and the die 120 are brought into contact with the nonferrous metal plate P in the course of the pressing operation when the insulating member 150 is provided on the surfaces of the punch 110 and the die 120, And the die 120 do not flow. Thus, the current flows unnecessarily to the die and the punch, thereby damaging the mold and the mold parts, insufficient current can not be applied to the non-ferrous metal plate, so that the non-ferrous metal plate can not be sufficiently heated, and energy is not lost.

According to another aspect of the present invention, the surface of the die and the punch can be coated with Teflon and insulated. Teflon is a combination of fluorine and carbon and has excellent insulation stability. Therefore, when Teflon is coated on the surface of the die and the punch, current does not flow through the punch 110 and the die 120 even if the punch 110 and the die 120 are brought into contact with the non-ferrous metal plate P during the pressing operation. Thus, the current flows unnecessarily to the die and the punch, thereby damaging the mold and the mold parts, insufficient current can not be applied to the non-ferrous metal plate, so that the non-ferrous metal plate can not be sufficiently heated, and energy is not lost.

Further, although not shown, the pulse current applying mold apparatus according to an aspect of the present invention may further include a temperature sensor for measuring the temperature of the non-ferrous metal plate. The temperature sensor may be provided on a punch or die. By providing the temperature sensor, the applied voltage can be controlled to heat the non-ferrous metal plate to the optimum forming temperature. Thus, by heating the non-ferrous metal plate at the optimum forming temperature and then performing the pressing work, it becomes possible to obtain a high-quality body panel.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10: Partition panel 20: Body panel
110: punch 111: first forming part
120: die 121: second forming part
130: Terminal 140: Power supply
150: Insulation member P: Nonferrous metal plate

Claims

A punch having a first shaping portion of a shape corresponding to a shape of an upper surface of the vehicle body panel on a lower surface thereof and being operated to ascend and descend;
A die disposed on the lower side of the punch and having a second molding section having a shape corresponding to a lower surface of the body panel on an upper surface thereof and molding a nonferrous metal plate into a body panel when the punch is assembled with the punch;
A plurality of terminals provided on a part of an upper surface of the die to apply a current to the non-ferrous metal plate placed on the die;
And a plurality of pulse current applying mold devices for forming a body panel.

The method according to claim 1,
Wherein an insulating member is provided on a surface of the die and the punch to insulate the mold.

The method according to claim 1,
Wherein a surface of the die and the punch is coated with Teflon to be insulated.