KR101382180B1 - Pre-heating device for hot stamping - Google Patents

Abstract

A warm-forming press apparatus is disclosed. Warm forming press apparatus according to an embodiment of the present invention is a pair of lower molds mounted on the lower bolster; A blank holder disposed between and respectively between the lower molds and installed on the bolster through cushion pins; Cooling means for cooling the lower mold by including an upper mold mounted on a slider at the top of each lower mold and press-molding a material injected between the lower molds; A cooling water supplier for supplying cooling water to the cooling means; At least one heater configured in the interior of the upper mold to heat the upper mold; A power supply for supplying power to the heater; And a controller configured to supply and control the cooling water from the cooling water supply to the cooling means according to the input of the material to the upper portion of the lower mold and the operation of the upper mold, and to supply and control the power from the power supply to the heater. do.

Description

Preheating device for hot stamping {PRE-HEATING DEVICE FOR HOT STAMPING}

The present invention relates to a pre-heating device for hot stamping, and more particularly, to a pre-heating device for hot stamping to preheat the material before the input so that the magnesium alloy sheet material supplied to the press device is formed in a warm state.

In general, magnesium alloy sheet is attracting attention as a new material to replace iron or aluminum as lightweight material because density of metal structure is lower than aluminum.

In recent years, in North and Central America, magnesium alloy sheet materials have been applied to automobiles for the purpose of weight reduction, and various press forming techniques for forming such magnesium alloy sheet materials are required.

However, such a magnesium alloy sheet material is excellent in thermal conductivity, and is excellent in fatigue and moldability at high temperatures, but the development of a press molding method corresponding thereto has not been universal.

That is, a general press apparatus is disadvantageous in that it can always be subjected to press molding of a material only at room temperature, and is not suitable for press molding of a material having excellent thermal conductivity and high temperature moldability like a magnesium alloy plate material.

Therefore, the present invention has been invented to solve the problems described above, the problem to be solved by the present invention is just before the input of the material into the press apparatus to be formed in the warm state of the magnesium alloy plate material supplied to the press apparatus By preheating, to provide a pre-heating device for hot stamping to improve the formability of the material during press molding.

Preheating device for hot stamping according to an embodiment of the present invention for achieving this object is a blank holder which is mounted on the lower bolster, the outer side of the lower mold is installed through the cushion pin on the bolster, and the lower mold A pre-heating device for hot stamping, wherein the pre-heating device is pre-heated to a press device including an upper mold mounted on a slider at an upper portion and press-molded a material injected between the lower mold and the lower mold. Mounting frame is configured on one side of; A lower heating unit mounted on an upper portion of the mounting frame and in contact with a lower surface of the raw material, and preheating the lower portion of the raw material depending on whether power is supplied; An upper heating unit disposed on an upper portion of the lower heating unit and connected to the lower heating unit through a connection plate, the upper heating unit being in contact with the upper surface of the raw material to preheat the upper portion of the raw material depending on whether power is supplied; A power supply for supplying power to the lower and upper heating units; And a controller for supplying and controlling power from the power supply to the lower and upper heating units, wherein the lower heating unit is fixedly mounted on an upper portion of the mounting frame; A lower core mounted to the lower housing while being inserted into the lower housing; A first heater installed adjacent to an upper surface of the lower core and configured to generate a high frequency heater or a cartridge heater to generate heat depending on whether power is supplied from the power supply; And a plurality of first rollers rotatably configured at an upper surface of the lower core and spaced apart from each other at predetermined intervals along a longitudinal direction of the lower core to be in contact with the lower surface of the material. The lower housing has a first heat insulator that prevents heat from being released from each side of the lower core except for the upper surface adjacent to the material, which is heated by the first heater to dissipate heat therebetween. A first mounting groove formed on both sides in the width direction at both ends of the lower housing so as to guide the material to be moved, respectively configured on both outer ends of the lower housing, and rotatably configured to the respective first mounting grooves. And further comprising a first guide means, the first guide roller being in rolling contact with the bottom surface of the material. The.

delete

delete

delete

delete

delete

delete

delete

delete

The upper heating unit is the upper heating unit is the upper housing is disposed on the upper portion of the material in the upper portion of the lower heating unit is connected to the lower heating unit through a connecting plate; An upper core mounted to the upper housing while being inserted into the upper housing; A second heater configured in the upper core and configured to be a high frequency heater or a cartridge heater to be heated according to whether power is supplied from the power supply and installed adjacent to a lower surface in the upper core; And a plurality of second rollers rotatably configured on a lower surface of the upper core and spaced apart at predetermined intervals along a longitudinal direction of the upper core to be in contact with the upper surface of the material. The upper housing is provided with a second heat insulator which prevents heat from being emitted from each side except for the lower surface adjacent to the material of the upper core which is heated through the second heater to dissipate heat therebetween. And second mounting grooves respectively formed at both ends in the width direction at both ends of the upper housing so as to guide the moved material, respectively configured at both ends of the upper housing, and rotatably in the respective second mounting grooves. It may further comprise a second guide means made of a second guide roller in contact with the upper surface of the material.

delete

delete

delete

delete

delete

delete

delete

As described above, according to the pre-heating device for hot stamping according to the embodiment of the present invention, the magnesium alloy sheet material supplied to the press device is preheated immediately before the input of the material to the press device so that the molding is performed in a warm state, There is an effect of improving the moldability of the material.

In addition, the magnesium alloy sheet having excellent thermal conductivity and high temperature formability is molded in a warm state within a set temperature range, thereby improving the molding quality of the product.

In addition, when forming the material through the press device, by preheating the molding portion of the material to be added next time can be continuously added to the press device without spending time due to the preheating of the material has the effect of improving the productivity of the product.

1 is a cross-sectional view of a preheating device for hot stamping according to an embodiment of the present invention.
FIG. 2 is an enlarged view of portion A of FIG. 1.
3 is a plan view of a preheating apparatus for hot stamping according to an embodiment of the present invention.

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

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, It should be understood that various equivalents and modifications may be present.

1 is a cross-sectional view of a preheating device for hot stamping according to an embodiment of the present invention, FIG. 2 is an enlarged view of a portion A of FIG. 1, and FIG. 3 is a view of the preheating device for hot stamping according to an embodiment of the present invention. Top view.

Referring to the drawings, the hot stamping preheating device 100 according to an embodiment of the present invention is configured on one side of the press device (1).

Here, the press device 1 is basically, as shown in Figure 1, the lower die 3 having a lower surface shape of the product is configured and mounted on the lower bolster 5, each of the lower die 3 A blank holder 7 is disposed between and outwards and is installed to the bolster 5 through a cushion pin 9.

In addition, the upper mold 11 having the upper surface shape of the product is mounted on the upper slider 11 at the upper portion of the lower mold 3.

That is, the upper mold 11 pressurizes the material 100 introduced between the lower mold 3 and the upper mold 11 from the upper portion of the blank mold 7 to form a product.

One side of the press device 1 configured as described above is continuously supplied with the material (P) through a material feeder not shown, the hot stamping preheating device 100 according to an embodiment of the present invention is the material (P) It is configured to correspond to the feeding direction of.

Here, the hot stamping preheating apparatus 100 according to an embodiment of the present invention is immediately before the material 100 is injected into the press apparatus 1 so that the magnesium alloy sheet material supplied to the press apparatus 1 is formed in a warm state. By preheating, it consists of a structure which can improve the moldability of the raw material P at the time of press molding.

To this end, the hot stamping preheating device 100 according to an embodiment of the present invention, as shown in Figure 2 and 3, the mounting frame 110, the lower heating unit 120, the upper heating unit 140 , A power supply 160, and a controller 170, which will be described in more detail for each component as follows.

First, the mounting frame 110 is configured on one side of the press device 1 into which the material P enters.

The lower heating unit 120 is mounted above the mounting frame 110.

The lower heating unit 120 is in contact with the lower surface of the material (P), preheating the lower portion of the material (P) according to the power supply.

Here, the lower heating unit 120 includes a lower housing 121, a lower core 123, a first heater 125, and a first roller 127.

First, the lower housing 121 is fixedly mounted on the upper portion of the mounting frame 110.

The lower core 123 is mounted to the lower housing 121 through bolts while being inserted into the lower housing.

The first heater 125 is installed adjacent to an upper surface of the lower core 123, and generates heat depending on whether power is supplied from the power supply 160.

Here, the lower housing 121 has a lower core 123, which is heated between the lower core 123 through the first heater 125 and dissipates heat, except for an upper surface adjacent to the material P. A first heat insulator 124 may be provided to prevent heat from being emitted from each side.

In the present embodiment, the first heater 123 may be configured as a high frequency heater or may be configured as a cartridge heater.

In addition, the first roller 127 is provided with a plurality, and is mounted on the upper surface of the lower core 123, so as to make a rolling contact with the lower surface of the material (P), when the raw material (P) into the press device 1, The movement of the material P is smoothly supported.

Here, each of the first rollers 127 is rotatably configured on the upper surface of the lower core 123, and a plurality of the first rollers 127 may be spaced apart at predetermined intervals along the longitudinal direction of the lower core 123.

The lower heating unit 120 configured as described above is heated by the first heater 125 to generate heat on the lower surface of the material P supplied from the material injector (not shown) through the lower core 123 that is heated. Heating.

On the other hand, in the present embodiment, the lower heating unit 120 further includes a first guide means 130 for guiding the material to be moved, respectively configured on both outer ends of the lower housing 121.

The first guide means 130 is configured to be rotatable in the first mounting grooves 131 formed on both sides in the width direction at both ends of the lower housing 121, and the first mounting grooves 131, respectively. It may be made of a first guide roller 133 in contact with the lower surface of the material (P).

The first guide means 130 configured as described above is in contact with the lower surface of the raw material P during the movement of the raw material P introduced into the press apparatus 1 together with the respective first rollers 127. Guided stably.

In the present embodiment, the upper heating unit 140 is disposed on the upper portion of the lower heating unit 120 is connected through the lower heating unit 120 and the connecting plate 149, the upper surface of the material (P) The upper part of the material (P) is preheated depending on whether the power supply.

Here, the upper heating unit 140 includes an upper housing 141, an upper core 143, a second heater 145, and a second roller 147.

First, the upper housing 141 is disposed on the upper portion of the material (P) in the upper portion of the lower heating unit 120 and through the connecting plate 149 and the lower housing 121 of the lower heating unit 120 Connected.

The upper core 143 is mounted to the upper housing 141 through bolts while being inserted into the upper housing 141.

In addition, the second heater 145 is installed adjacent to the lower surface of the upper core 143, and generates heat depending on whether power is supplied from the power supply 160.

Here, the upper housing 141 is heated between the upper core 143 and the inner side of the upper housing 141 except for the lower surface adjacent to the material (P) is the upper core 143 that dissipates heat. A second heat insulator 144 may be provided to prevent heat from being emitted from each side.

In the present embodiment, the second heater 145 may be configured as a high frequency heater or may be configured as a cartridge heater.

And the second roller 147 is provided with a plurality, and is mounted on the lower surface of the upper core 143, so as to make a rolling contact with the upper surface of the material (P), when the raw material (P) into the press device 1, The movement of the material P is smoothly supported.

Here, each of the second rollers 147 is rotatably configured at the lower surface of the upper core 143, and a plurality of the second rollers 147 may be spaced apart at predetermined intervals along the longitudinal direction of the upper core 143.

The upper heating unit 140 configured as described above is heated by the second heater 145 to heat the upper surface of the material P supplied from the material injector (not shown) through the upper core 143 that is heated. Heating.

On the other hand, in the present embodiment, the upper heating unit 140 further includes a second guide means 150 for guiding the material (P), which is configured and moved outside the both ends of the upper housing 141, respectively.

The second guide means 150 is configured to be rotatable in each of the second mounting grooves 151 and the second mounting grooves 151 respectively formed on both sides in the width direction at both ends of the upper housing 141. It may be made of a second guide roller 153 in contact with the upper surface of the material (P).

The second guide means 150 configured as described above is brought into rolling contact with the upper surface of the material P during the movement of the material P introduced into the press apparatus 1 together with the second rollers 147. Guided stably.

The power supply 160 is separately configured to supply power to the first and second heaters 127 and 147 from the outside of the lower and upper heating units 120 and 140.

In the present embodiment, the controller 170 controls the supply of power from the power supply 160 to the first and second heaters 125 and 145 of the lower and upper heating units 120 and 140, respectively.

Here, the material (P) is to use a magnesium alloy plate material having excellent thermal conductivity, excellent fatigue and formability at high temperatures, in consideration of this point is preheated to the lower and upper heating units (120, 140) The set temperature range of the lower core 123 and the upper core 143 may be determined within a range of 150 ° C to 200 ° C.

That is, the controller 170, if the raw material (P) is located on the lower and upper heating units (120, 140) before the input of the raw material (P) to the press device 1, from the power supply 160 Power is applied to the first and second heaters 125 and 145.

Then, the first and second heaters 125 and 145 generate heat and heat the lower and upper cores 123 and 143 to dissipate heat, respectively, and are set by heating the upper and lower surfaces of the material P. When the preheating to the temperature is completed, the application of power to the heaters 125 and 145 is stopped, and then the raw material P is moved to the press apparatus 1.

The hot stamping preheating apparatus 100 configured as described above preheats the material P continuously supplied from the material input machine before molding through the press device 1 and inputs it to the press device 1 in a warm state.

In addition, the hot stamping preheating device 100 continuously preheats the material whose movement has been stopped until the molding P of the material P introduced in the warm state to the press device 1 is continuously heated to the press device 1. It can be put in.

Therefore, when applying the pre-heating device 100 for hot stamping according to the embodiment of the present invention configured as described above, the material before the molding so that the magnesium alloy plate material supplied to the press device 1 is formed in a warm state ( By preheating P), the moldability of the raw material P can be improved during molding through the press apparatus 1.

In addition, the magnesium alloy sheet having excellent thermal conductivity and high temperature formability may be molded in a warm state within a set temperature range, thereby improving product molding quality.

In addition, during the molding of the raw material P through the press device 1, the molded part of the raw material P to be put next is preheated to continuously the press device 1 without time consuming according to the preheating of the raw material P. It can be added to improve the productivity of the product.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

1: press device 3: lower mold
5: bolster 7: blank holder
9: cushion pin 11: upper type
13: slider 100: preheating device
110: mounting frame 120: lower heating unit
121: lower housing 123: lower core
124: first heat insulating material 125: first heater
127: first roller 130: first guide means
131: first mounting groove 133: first guide roller
140: upper heating unit 141: upper housing
143: upper core 144: second insulating material
145: second heater 147: second roller
150: second guide means 151: second mounting groove
153: second guide roller 160: power supply
170: controller P: material

Claims (17)

Pressing down the lower mold mounted on the lower bolster, the blank holder disposed outwardly of the lower mold and installed on the bolster through the cushion pin, and a material mounted between the upper mold and the lower mold mounted on the upper slider of the lower mold In the pre-heating device for hot stamping to pre-heat the material introduced into the press device including the upper mold to form,
A mounting frame configured at one side of the press apparatus into which the material enters; A lower heating unit mounted on an upper portion of the mounting frame and in contact with a lower surface of the raw material, and preheating the lower portion of the raw material depending on whether power is supplied; An upper heating unit disposed on an upper portion of the lower heating unit and connected to the lower heating unit through a connection plate, the upper heating unit being in contact with the upper surface of the raw material to preheat the upper portion of the raw material depending on whether power is supplied; A power supply for supplying power to the lower and upper heating units; And a controller configured to supply and control power from the power supply to the lower and upper heating units.
The lower heating unit is a lower housing fixedly mounted on the upper portion of the mounting frame; A lower core mounted to the lower housing while being inserted into the lower housing; A first heater installed adjacent to an upper surface of the lower core and configured to generate a high frequency heater or a cartridge heater to generate heat depending on whether power is supplied from the power supply; And a plurality of first rollers rotatably configured at an upper surface of the lower core and spaced apart from each other at predetermined intervals along a longitudinal direction of the lower core to be in contact with the lower surface of the material.
The lower housing has a first heat insulator that prevents heat from being released from each side of the lower core except for the upper surface adjacent to the material, which is heated by the first heater to dissipate heat therebetween. Equipped,
First mounting grooves respectively formed at both ends in the width direction at both ends of the lower housing so as to guide the moving material, respectively configured at both ends of the lower housing, and rotatably configured in the first mounting grooves And a first guide means comprising a first guide roller in rolling contact with the bottom surface of the hot stamping device. delete delete delete delete delete delete delete delete The method of claim 1,
The upper heating unit is disposed in the upper portion of the material in the upper portion of the lower heating unit is connected to the lower heating unit through a connecting plate; An upper core mounted to the upper housing while being inserted into the upper housing; A second heater configured in the upper core and configured to be a high frequency heater or a cartridge heater to be heated according to whether power is supplied from the power supply and installed adjacent to a lower surface in the upper core; And a plurality of second rollers rotatably configured on a lower surface of the upper core and spaced apart at predetermined intervals along a longitudinal direction of the upper core to be in contact with the upper surface of the material.
The upper housing is provided with a second heat insulator which prevents heat from being emitted from each side except for the lower surface adjacent to the material of the upper core which is heated through the second heater to dissipate heat therebetween. ,
Second mounting grooves respectively formed on both sides in the width direction at both ends of the upper housing so as to guide the moving material, respectively configured on both outer sides of the upper housing, and rotatably configured in the second mounting grooves. And a second guide means comprising a second guide roller in contact with the upper surface of the hot stamping. delete delete delete delete delete delete delete

Images