KR101450821B1 - Warm press mold device for molding vehicle body panel - Google Patents

Abstract

A warm press mold apparatus for molding a vehicle body panel includes a die, a punch, a first heater and a second heater, a first temperature sensor and a second temperature sensor, and a temperature control unit. A first forming portion having a shape corresponding to the top surface shape of the vehicle body panel is formed on the lower surface of the die, and the elevating operation is performed. The punch is supported on the lower side of the die with a magnesium plate member, and a second molding portion having a shape corresponding to the bottom shape of the vehicle body panel is formed on the upper surface thereof, and the magnesium plate material is molded into the body panel when assembled with the die. The first heater and the second heater are respectively mounted on the die and the punch to heat the die and the punch. The first temperature sensor and the second temperature sensor measure the temperature of the die and the punch heated by the first and second heaters. The temperature controller receives the measured temperature from the first and second temperature sensors, and controls the first and second heaters to mold the magnesium plate into the body panel while maintaining the set temperature.

Description

Technical Field [0001] The present invention relates to a warm press mold device for molding a body panel,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm press mold apparatus used for molding a lightweight body panel.

In the conventional automobile industry, the frequency of use of steel is high, but as the interest in environment and fuel consumption is increased, new materials are being actively applied to lighten the vehicle. 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 secure the weight saving of an automobile body by manufacturing a body part to which magnesium (Mg), a non-ferrous metal, is applied.

However, when magnesium is applied, since the crystal structure of magnesium is a dense hexagonal lattice, the moldability at room temperature is very poor. Therefore, in the conventional cold forming process, stamping, press forging, drawing, It is difficult to produce a molded plate product using a process such as bending. In addition, when molding a component having a complicated shape with a magnesium plate, defects may occur in various portions.

Patent Registration No. 10-1067047 (issued on September 22, 2011)

It is an object of the present invention to provide a warm press mold apparatus for molding a vehicle body panel that enables a vehicle panel to be easily molded with a lightweight magnesium plate material, thereby ensuring weight saving of the vehicle body.

According to an aspect of the present invention, there is provided a warm press mold apparatus for molding a vehicle body panel, comprising: a die having a first molding section having a shape corresponding to a top surface shape of a body panel on a lower surface thereof; A punch for supporting a magnesium plate on the lower side of the die and forming a second forming portion having a shape corresponding to a bottom shape of the body panel on an upper surface thereof and forming a magnesium plate on the body panel when the die is assembled with the die; A first heater and a second heater respectively mounted on the die and the punch to heat the die and the punch; A first temperature sensor and a second temperature sensor for measuring a temperature of the die and the punch heated by the first and second heaters; And a temperature controller for controlling the first and second heaters to form the magnesium plate in a body panel in a state that the magnesium plate is maintained at a preset temperature by receiving the measured temperatures from the first and second temperature sensors.

According to the present invention, since a magnesium material plate having poor room temperature formability is heated to form a body panel in a warm state in which the formability is enhanced, 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.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a body panel molding apparatus for molding a body panel of a vehicle body panel.
Figure 3 is a perspective view of the die in Figure 2;
4 is a plan sectional view showing an example in which the first heating rods and the first temperature sensor are mounted on the die shown in Fig.
Fig. 5 is a view showing an example of a first heating rod in Fig. 4; Fig.
Fig. 6 is a perspective view of the punch in Fig. 2; Fig.
7 is a plan view showing another example of a body panel.
8 is a perspective view of a die for molding the body panel of Fig. 7;
9 is a plan sectional view showing an example in which the first heating rods and the first temperature sensor are mounted on the die shown in Fig.
Fig. 10 is a perspective view of a punch for molding the body panel of Fig. 7; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 assembled with the reinforcement panel 20 shown in Fig. 7 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.

2 is a block diagram of a warm press mold apparatus for molding a body panel according to an embodiment of the present invention for molding the body panel of FIG. Figure 3 is a perspective view of the die in Figure 2; 4 is a plan sectional view showing an example in which the first heating bars and the first temperature sensor are mounted on the die shown in FIG. Fig. 5 is a view showing an example of the first heating rod in Fig. Fig. 6 is a perspective view of the punch in Fig. 2;

2 to 6, the warm press mold apparatus 100 for molding a vehicle body panel includes a die 110, a punch 120, a first heater 130, a second heater 140 A first temperature sensor 150, a second temperature sensor 160, and a temperature controller 170.

The die 110 moves up and down with respect to the punch 120. For example, the die 110 may be connected to a movable frame (not shown) of a hydraulic or mechanical press apparatus so that when the movable frame is moved up and down, it can move up and down together with the movable frame. The die 110 has a structure in which a first forming portion 111 having a shape corresponding to the top surface shape of the body panel 10 is formed on the bottom surface. When the vehicle 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 punch 120 is disposed below the die 110. The punch 120 is released or compounded with the die 110 as the die 110 moves up or down. The punch 120 may be fixed on a fixed frame (not shown). The punch 120 receives and supports the magnesium plate to be formed by the body panel 10. Magnesium plate is a plate made of magnesium or magnesium alloy material. The magnesium sheet may be fed into the punches in a preheated state.

The punch 120 is formed with a second molding part 121 having a shape corresponding to the bottom shape of the body panel 10 on the upper surface thereof. The punch 120 forms the magnesium plate into the body panel 10 when assembled with the die 110. That is, when the die 110 is lowered and is paired with the punch 120, the magnesium plate material positioned between the first forming part 111 and the second forming part 121 is separated from the first and second forming parts 111 and 121 So that the vehicle body panel 10 can be formed.

The first heater 130 is mounted to the die 110 to heat the die 110. The second heater 140 is mounted on the punch 120 to heat the punch 120. When the die 110 and the punch 120 heated by the first and second heaters 130 and 140 are assembled with the magnesium plate sandwiched therebetween, the magnesium plate is heated by the heat of the die 110 and the punch 1120 .

The first temperature sensor 150 is for measuring the temperature of the die 110 heated by the first heater 130 and the second temperature sensor 160 is for measuring the temperature of the die 110 heated by the second heater 140. [ 120). ≪ / RTI > The temperature measured from the first and second temperature sensors 150 and 160 is supplied to the temperature controller 170.

The temperature controller 170 receives the measured temperature from the first and second temperature sensors 150 and 160 and controls the first and second heaters 150 and 160 to mold the magnesium plate into the body panel 10 while maintaining the set temperature. 130) < / RTI > For example, the temperature controller 170 controls the first and second heaters 130 and 140 to heat the die 110 and the punch 120 to a set temperature within a range of 200 ° C to 250 ° C, So that the vehicle body panel 10 can be formed.

According to the warm-pressing mold apparatus 100 having the above-described configuration, since the magnesium plate material having poor room temperature moldability is heated to form the body panel 10 in a warm state in which the moldability is enhanced, It can be easy. 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.

The first heater 130 may include a plurality of first heating rods 131. 5, the first heating rod 131 includes a tube 132, a heating wire 133 wound around the tube 132, and a lead wire 134 for supplying current to the heating wire 133 ). ≪ / RTI > The tubular body 132 may be made of a material such as stainless steel. The heating wire 133 is made of nickel chromium or the like and can be accommodated in the tube 132 in a state wound around the magnesium core. The heating wire 133 generates heat in the tube 132 by electric current to transmit heat to the tube 132. The lead wires 134 are connected to an external power source to supply current to the heating wire 133. The lead wires 134 may be made of heat resistant wires.

The first heating rods 131 are inserted into the die 110 and placed on the upper side of the first forming part 111, respectively. Here, the first heating rods 131 have a length such that both ends of the first heating rods 131 can be placed outside the first forming portion 111. The die 110 may have insertion openings for inserting the first heating rods 131 on the upper side of the first forming part 111, respectively. If the tolerance between the insertion port of the die 110 and the first heating bar 131 is increased, the efficiency of heat transfer to the die 110 may be reduced. Therefore, the tolerance between the insertion port of the die 110 and the first heating bar 131 And may be about 0.15 mm or less. When the vehicle body panel 10 corresponds to a substantially rectangular partition panel, the first heating rods 131 may be arranged at regular intervals. Accordingly, the heat can be uniformly transferred to the magnesium plate material positioned in the first forming portion 111. [

The first temperature sensor 150 may include at least one thermocouple. The thermocouple can be inserted into the die 110 and mounted. A thermocouple may be positioned between the first heating rods 131 to measure the temperature of the die 110. It goes without saying that the first temperature sensor 150 may be composed of various temperature sensors other than the thermocouple.

The second heater 140 may include a plurality of second heating rods 141. The second heating rod 141 may be configured in the same manner as the first heating rod 131. The second heating rods 141 are respectively inserted into the punch 120 and placed on the lower side of the second forming portion 121. Here, the second heating rods 141 have a length such that both ends of the second heating rods 141 can be placed outside the second forming portion 121. The punch 120 may be formed with insertion ports for inserting the second heating rods 141 under the second forming part 121, respectively. The second heating rods 141 are arranged at regular intervals in the same manner as the first heating rods 131 so that the heat can be uniformly transferred to the magnesium plate located in the second forming portion 121.

The second temperature sensor 160 may include at least one thermocouple. The thermocouple can be inserted into the punch 120 and mounted. The thermocouple can be positioned between the second heating rods 141 to measure the temperature of the punch.

7 is a plan view showing another example of the vehicle body panel. The body panel 20 shown in Fig. 7 corresponds to a reinforced panel assembled in a partition panel. The die and punch for forming the reinforcing panel can be constructed as shown in Figs. 8 to 10. Fig. Here, FIG. 8 is a perspective view of the die for molding the body panel of FIG. 7. 9 is a plan sectional view showing an example in which the first heating rods and the first temperature sensor are mounted on the die shown in Fig. Fig. 10 is a perspective view of a punch for molding the body panel of Fig. 7; Fig.

8 to 10, the first forming portion 211 of the die 210 has a shape corresponding to the top surface shape of the body panel 20 corresponding to the reinforcing panel. The second forming portion 221 of the punch 220 has a shape corresponding to the bottom shape of the vehicle body panel 20. [ The shape of the die 210 and the punch 220 may also be approximately similar to the shape of the body panel 20, respectively.

8, the first heating rods 131 are arranged side by side at equal intervals on both sides except for the central region of the first forming portion 211. In this case, So that heat can be applied to the first forming part 211 as much as possible. The first temperature sensor 150 may be positioned between the first heating rods 131 located in the central region of the first forming portion 211 to measure the temperature of the die 210. The second heating rods 141 may be arranged on the lower side of the second forming portion 221 in the same manner as the first heating rods 131. Also, the second temperature sensor 160 may be disposed in the second forming unit 221 in the same manner as the first temperature sensor 150.

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.

110, 210. Die 111, 211. The first forming part
120,220 .. Punch 121,221 .. Second forming part
130 .. first heater 131 .. first heating rod
140 .. second heater 141 .. second heating rod
150 .. first temperature sensor 160 .. second temperature sensor
170,

Claims (3)

A first molding part having a shape corresponding to a top surface shape of the vehicle body panel is formed on a lower surface of the body panel;
A punch for supporting a magnesium plate on the lower side of the die and forming a second forming portion having a shape corresponding to a bottom shape of the body panel on an upper surface thereof and forming a magnesium plate on the body panel when the die is assembled with the die;
A first heater having a plurality of first heating rods inserted into the die via insertion ports of the die so as to lie on the upper side of the first forming portion to heat the die;
A second heater including a plurality of second heating rods inserted into the punch through the insertion ports of the punch so as to lie on the lower side of the second forming part to heat the punch;
A first temperature sensor and a second temperature sensor for measuring a temperature of the die and the punch heated by the first and second heaters; And
And a temperature controller for controlling the first and second heaters to form the magnesium plate in a body panel in a state that the magnesium plate is maintained at a preset temperature by receiving the measured temperature from the first and second temperature sensors,
Wherein each of the first and second heating rods includes a tube body, a superheated tube wound around the tube body, and lead wires supplying current to the superheated tube and drawn out through one end of the tube body, Warm press die tool. delete The method according to claim 1,
Wherein the first and second temperature sensors each include at least one thermocouple, and the thermocouples are inserted into the die and the punch, respectively.

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