KR20180122224A - Press apparatus for composite forming and method of thesame - Google Patents

Abstract

The present invention relates to a composite forming press apparatus and a method thereof and, more specifically, relates to a composite forming press apparatus and a method thereof, which can preheat a board and a mold at the same time. To achieve this, according to an embodiment of the present invention, the composite forming press apparatus forms a high steel board, and comprises: an upper mold fixated to an upper slider, wherein an upper forming surface is formed to form the board in the predetermined shape; a lower mold fixated to a bolster, wherein a lower forming surface is formed by corresponding to the upper forming surface; a blank holder arranged in a circumference of the lower mold to ascend and descend through a cushion spring, and formed in the bolster; a transfer preheating unit formed at one side of the blank holder to transfer a board to be formed and inputted to a forming position between the upper mold and the lower mold, and at the same time, preheating the board, the upper forming surface of the upper mold, and the lower forming surface of the lower mold to a predetermined temperature; and a fixing guide unit formed at the other side of the blank holder to fixate the board to a front end when the board to be formed is inputted into the forming position by the transfer preheating unit, and enabling the board to ascend and descend in accordance with operation of the upper mold.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a press-

The present invention relates to a composite molding press apparatus and method, and more particularly, to a composite molding press apparatus and method capable of simultaneously preheating a plate material and a mold.

[0002] In recent years, as a vehicle body has been made lighter and lighter, it has become increasingly sophisticated to use a composite material plate such as a steel plate such as ultra high tensile steel, a non-ferrous metal plate such as aluminum or magnesium or the like as well as a carbon fiber reinforced plastic (CFRP: Carbon Fiber Reinforced Plastics There have been frequent applications.

Since these composite materials have excellent strength, elastic modulus, light weight, and stability, they are widely regarded as one of the main materials in the aviation and automobile fields requiring high performance. If the economic conditions are solved, The production volume of the material is expected to increase dramatically.

In particular, composite materials in the automotive industry are mainly made by impregnating plastic materials such as epoxy or plastic with fiber materials. For example, CFRP is a state-of-the-art composite material that can be manufactured by making carbon fiber in a winding or fabric shape, then impregnating it in resin streams and curing, and is attracting attention as a lightweight material with high strength and high elasticity.

Generally, to form composite materials, hot stamping and warm molding are used.

In the hot stamping method and the warm forming method, the plate and the mold are separately preheated by using a warm mold including a heating device such as a cartridge and a heating furnace, and molding of the product proceeds.

In the conventional case, if the mold is preheated, it is difficult to secure the mold pressure and quality due to thermal deformation of the mold, and a larger quantity of the spare mold is required than the cold mold. Such thermal deformation causes the molding environment to be continuously changed due to the influence of the surrounding environment and the season, resulting in a problem of deterioration in productivity and quality.

The matters described in the background section are intended to enhance the understanding of the background of the invention and may include matters not previously known to those skilled in the art.

An embodiment of the present invention provides a composite molding press apparatus and method capable of simultaneously preheating a plate material, a top mold, and a bottom mold surface using a transfer preheating unit.

The embodiments of the present invention provide a composite molding press apparatus and method capable of preheating plate materials and molds through convection heat.

According to an embodiment of the present invention, there is provided a composite molding press apparatus for molding a high-strength steel plate, comprising: an upper mold having an upper molding surface for molding the plate into a predetermined shape and fixed on an upper slider; A lower mold having a lower molding surface corresponding to the upper molding surface and fixed to the bolster; A blank holder disposed on the bottom of the bolster and rising and lowering through a cushion spring; When the plate to be formed is inserted into one side of the blank holder, the plate is transferred to a molding position between the upper and lower molds, and the upper molding surface of the upper mold and the lower molding surface of the lower mold are preheated to a predetermined temperature A transfer preheating unit; And a fixing guide unit which is provided on the other side of the blank holder and fixes the leading end of the sheet material to the sheet material to be formed by the conveyance preheating unit so as to raise and lower the sheet material according to the operation of the sheet material, The present invention can provide a composite molding press apparatus including the above-

The transfer preheating unit may include a rotary motor fixed on the bolster corresponding to one side of the blank holder; A socket fixed to a tip of a rotary shaft connected to the rotary motor; And a preheating case connected to the socket and having a heat source formed therein, for preheating the plate to be introduced through the opening.

In addition, the preheating case may preheat the upper molding surface of the upper mold and the lower molding surface of the lower mold using the heat source.

In addition, the heat source may be a high frequency induction heater or an infrared lamp formed inside the preheating case.

Further, the rotation motor may be constituted by a servo motor capable of controlling the rotation direction and the rotation speed.

Further, the fixed guide unit may include a guide bar vertically installed on the bolster in correspondence with the other side of the blank holder; A clamper which is integrally formed on a slider moving along the guide rod and in which a leading end of a sheet material to be inserted is inserted; A return spring for providing an upward bearing force of the clamper in a state of being fitted to the guide rod; And a clamping actuator which is disposed on one side of the clamper and fixes the tip end of the plate material fitted to the clamper with a fixing pin.

The fixed guide unit may further include a temperature sensor installed inside the clamper and detecting a temperature of the plate material.

According to another embodiment of the present invention, there is provided a composite molding press method for molding a high-strength steel plate, comprising the steps of: inputting a plate to be molded into a transfer preheating unit; The transfer preheating unit is rotated and transferred to a forming position between the upper mold and the lower mold in a state that the plate is inserted, and fixing the tip of the plate to the stationary guide unit; Preheating the sheet material, the upper molding surface of the upper mold and the lower molding surface of the lower mold to a predetermined temperature through the transfer preheating unit; When the upper molding surface of the upper mold and the lower molding surface of the lower mold are preheated to a predetermined temperature, the transfer preheating unit is rotated and released from the molding position while the tip of the plate is fixed to the fixed guide unit; And molding the plate material into a predetermined shape by combining the upper and lower molds.

Since the embodiment of the present invention can simultaneously preheat the plate material and the surfaces of the upper mold and the lower mold using the transfer preheating unit, it is possible to prevent the heat loss from being caused by the upper and lower molds of the plate material, .

In addition, since the plate material and the mold can be preheated through the convection heat, the plate material and the mold are preheated in a short time, and no separate cooling device is required. Therefore, the mold and investment cost can be saved, and the cost of the product can be saved.

In addition, effects obtainable or predicted by the embodiments of the present invention will be directly or implicitly disclosed in the detailed description of the embodiments of the present invention. That is, various effects to be predicted according to the embodiment of the present invention will be disclosed in the detailed description to be described later.

1 is a view showing a composite molding press apparatus according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a preheating case of a composite molding press apparatus according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a clamper of a composite forming press apparatus according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a composite molding press method according to an embodiment of the present invention.
5 to 10 are process charts sequentially illustrating a composite molding press method according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. It should be understood, however, that the drawings and the following detailed description are exemplary and explanatory of various embodiments for effectively illustrating the features of the present invention. Therefore, embodiments of the present invention should not be limited to the following drawings and descriptions.

Further, in the following description of the embodiments of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the gist of the present invention unnecessarily obscure. The terms used below are defined in consideration of the functions of the embodiments of the present invention, which may vary depending on the user, the intention or custom of the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

In order to efficiently explain the essential technical features of the present invention, the following embodiments will appropriately modify, integrate, or separate terms to be understood by those skilled in the art to which the present invention belongs , And the present invention is by no means thereby limited.

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

2 is a cross-sectional view showing a preheating case of a composite molding press apparatus according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a composite molding press apparatus according to an embodiment of the present invention. Sectional view showing a clamper of a composite molding press apparatus according to an embodiment.

1, a composite molding press apparatus according to the present invention includes an upper mold 100, a lower mold 140, a blank holder 160, a transfer preheating unit 200, a fixed guide unit 250, and a controller 300 .

The upper mold 100 forms an upper molding surface 105 to mold the plate 50 into a predetermined shape. This upper shaping surface 105 is formed with the final product shaping surface to form the final shape of the product.

The upper mold 100 is fixed on the upper slider 110. The upper mold 100 is lifted and lowered according to the operation of the upper slider 110. That is, the upper mold 100 is driven to move downward according to the operation of the upper slider 110, and is merged with the lower mold 140, or is driven to move upward and released from the lower mold 140.

The lower mold 140 is located corresponding to the upper mold 100. The lower mold 140 forms a lower molding surface 145 in correspondence with the upper molding surface 105 of the upper mold 100 to mold the plate 50 into a predetermined shape.

The lower mold 140 is fixed on the bolster 150.

The blank holder 160 is fixed on the bolster 150. That is, the blank holder 160 is disposed around the lower die 140.

The blank holder 160 is installed so as to be movable in the vertical direction. That is, the blank holder 160 is moved up and down through the cushion spring 165.

The transfer preheating unit 200 is disposed on one side of the blank holder 160 and the plate material 50 is inserted and transfers the plate material 50 between the upper mold 100 and the lower mold 140. To this end, the transfer preheating unit 200 includes a rotary motor 210, a socket 220 and a preheating case 230.

The rotation motor 210 is fixed on the bolster 150. That is, the rotary motor 210 is fixed on the bolster 150 corresponding to one side of the blank holder 160.

The rotation motor 210 is operated under the control of the controller 300. That is, the rotation direction and the rotation number of the rotation motor 210 are controlled by the controller 300.

The rotation motor 210 may be a servo motor that can be controlled by the controller 300.

The socket 220 is fixed to the tip of the rotary shaft 215 connected to the rotary motor 210. The socket 220 is rotated by the rotation of the rotation motor 210.

The preheating case 230 is connected to the socket 220. The preheating case 230 is rotated in rotation of the socket 220.

The preheating case 230 is formed with an opening 235 having one side opened as shown in FIG. The plate member 50 is inserted through the opening 235.

The preheating case 230 is released to the outside of the upper mold 100 and the lower mold 140 when the upper mold 100 and the lower mold 140 are combined to insert the plate material 50 or to form the plate material 50. [

The preheating case 230 is transferred to the forming position between the upper die 100 and the lower die 140 by the rotation of the rotary motor 210 when the plate material 50 is inserted. At this time, the forming position may indicate a position for forming the plate material 50. [

The preheating case 230 preheats the plate material 50, the upper molding surface 105 of the upper mold 100 and the lower molding surface 145 of the lower mold 140 to a predetermined temperature by using a heat source provided therein. At this time, the predetermined temperature is a predetermined temperature for forming the plate material 50, and may be different depending on the type of the plate material 50 and the like.

The heat source may be a high frequency induction heater or an infrared lamp configured inside the preheating case 230. By preheating the plate material 50, the upper molding surface 105 of the upper mold 100 and the lower molding surface 145 of the lower mold 140 using the convection heat such as high frequency and infrared rays, the preheating can be performed in a short time.

The stationary guide unit 250 is configured on the other side of the blank holder 160 to fix the plate 50. To this end, the fixed guide unit 250 includes a guide rod 260, a clamper 270, a return spring 265, a clamping actuator 280 and a temperature sensor 290.

The guide rod 260 is fixed on the bolster 150. That is, the guide bar 260 is vertically installed on the bolster 150 in correspondence with the other side of the blank holder 160.

The clamper 270 is integrally formed on the slider 275 which moves along the guide bar 260. That is, the clamper 270 is lowered using the slider 275 along the guide bar 260 by the lowering upper mold 100. At this time, the slider 275 is fixed with a stopper 277 to prevent the slider 275 from being released to the outside of the guide bar 260.

The clamper 270 is fitted at the tip end of the plate member 50, which is located at the forming position. The clamper 270 is formed with an insertion portion 275 having one side opened. That is, the clamper 270 is disposed in parallel with the preheating case 230, and the front end of the plate material 50 protruding outward from the plate material 50 inserted into the preheating case 230 is inserted into the insertion portion 275.

The return spring 265 is fitted into the guide rod 260.

The return spring 265 provides an upward bearing force of the clamper 270. That is, when the upper mold 100 is lifted up, the return spring 265 returns the clamper 270 to the original position by providing an upward supporting force to the slider 275 formed integrally with the clamper 270.

The clamping actuator 280 is located on one side of the clamper 270.

The clamping actuator 280 is formed with a fixing pin 285 for fixing the plate member 50.

In other words, the clamping actuator 280 keeps the fixing pin 285 in an elevated state when the plate material 50 is not caught by the clamper 270, as shown in Fig. 3 (a).

3 (b), the clamping actuator 280 moves down the fixing pin 285 to fix the plate 50 to the plate member 50 when the plate member 50 is inserted into the inserting portion 275 of the clamping member.

The temperature sensor 290 is configured inside the clamper 270. The temperature sensor 290 may be spaced apart from the clamping actuator 280 within the clamper 270.

The temperature sensor 290 detects the temperature of the plate material 50 fitted to the clamper 270 and provides the detected plate material temperature signal to the controller 300.

The controller 300 controls the components of the composite forming press device to form the plate 50.

In other words, when the plate material 50 is inserted into the preheating case 230, the controller 300 controls the rotation motor 230 to transfer the socket 220 and the preheating case 230 to the molding position between the upper mold 100 and the lower mold 140. [ Lt; / RTI >

The controller 300 controls the clamping actuator 280 for fixing the plate member 50 when the preheating case 230 is coupled to the clamper 270 to fix the fixing pin 285 to the plate member 50.

In addition, the controller 300 receives the sheet material temperature signal from the temperature sensor 290. The controller 300 determines whether the sheet material temperature signal is equal to or higher than the reference temperature. Here, the reference temperature may be a temperature set for molding the plate material 50. [

The controller 300 stops the operation of the heat source configured in the preheating case 230 when the sheet material temperature signal is higher than the reference temperature and controls the drive motor to release the socket 220 and the preheating case 230 from the forming position do.

Hereinafter, a composite molding press method will be described with reference to FIGS. 4 to 10. FIG.

FIG. 4 is a flowchart illustrating a composite molding press method according to an embodiment of the present invention, and FIGS. 5 to 10 are process diagrams sequentially illustrating a composite molding press method according to an embodiment of the present invention.

Referring to FIG. 4, a sheet material 50 to be formed is fed into the conveyance preheating unit 200 (S410).

5, the rotary motor 210 is rotated to insert the plate material 50 into the preheating case 230 of the conveyance preheating unit 200 and the outer side of the upper die 100 and the lower die 140 The preheating case 230 is located.

The plate member 50 to be formed is inserted through the opening 235 in which the preheating case 230 is formed. At this time, the plate member 50 may be a high-strength plate member.

The transfer preheating unit 200 is rotated and transferred to the forming position between the upper mold 100 and the lower mold 140 while the plate material 50 is being inserted and the tip end of the plate material 50 is fixed to the stationary guide unit 250 (S420).

6, when the sheet material 50 is inserted into the preheating case 230 of the conveyance preheating unit 200, the sheet material 50 is rotated through the rotation motor 210 of the conveyance preheating unit 200, The preheating case 230 is transported to the forming position between the lower mold 140 and the lower mold 140.

The tip end of the plate member 50 is fitted to the clamper 270 of the fixed guide unit 250 and the clamping actuator 280 is operated in a state in which the plate member 50 is fitted in the clamper 270, Is fixed through the fixing pin 285.

The transfer preheating unit 200 preheats the plate 50 to a predetermined temperature (S430).

7, the plate material 50, the upper molding surface 105 of the upper mold 100, and the lower mold 140 (see FIG. 7) of the upper mold 100 are formed by using a heat source built in the preheating case 230 of the transfer preheating unit 200, ) Is preheated to a predetermined temperature. The plate material 50 can be preheated to the reference temperature by using the plate material temperature signal detected through the temperature sensor 290 constituted by the clamper 270.

The reason why only the upper molding surface 105 and the lower molding surface 145 are preheated is to prevent heat loss of the plate material 50 due to the mold.

The conveying preheating unit 200 is rotated and released from the forming position while the leading end of the plate material 50 is fixed to the stationary guide unit 250 (S440).

8, after the plate material 50, the upper molding surface 105 of the upper mold 100, and the lower molding surface 145 of the lower mold 140 are preheated to a predetermined temperature, The preheating case 230 of the conveyance preheating unit 200 is rotated through the rotation motor 210 of the conveyance preheating unit 200 while the leading end is fixed through the fixing pin 285 of the fixing guide unit 250 Leaving the molding position.

The upper die 100 is joined to the lower die 140 to form the plate 50 in a predetermined shape (S450).

9, the upper mold 100 is lowered through the upper slider 110, and the blank holder 160 is lowered by the cushion spring 165 by the lowering of the upper mold 100 . The clamper 270 of the stationary guide unit 250 is lowered with the plate member 50 sandwiched along the guide rod 260 by the lowering of the upper mold 100.

The plate material 50 is then passed through the upper molding surface 105 of the upper mold 100 and the lower molding surface 145 of the lower mold 140 in a state that the plate material 50 is fitted in the clamper 270, .

The upper mold 100 is lifted up through the upper slider 110 and the upper end of the upper mold 100 is lifted by the lifting of the upper mold 100 so that the blank holder 160 and the clamper (270) rises and is positioned at the original position. At this time, the clamper 270 can be returned to its original position by the return spring 265 inserted in the guide rod 260.

Thereafter, the product 70 molded by the upper mold 100 and the lower mold 140 is completed.

Accordingly, as described above, the composite molding press apparatus according to the present invention can preheat the plate material, the upper molding surface of the upper mold and the lower molding surface of the lower mold to a predetermined temperature through the heat source formed inside the preheating case of the transfer preheating unit Therefore, it is possible to prevent heat loss from occurring due to the upper and lower plates.

Further, since the composite molding press apparatus according to the embodiment of the present invention can be preheated in a short time, the manufacturing time can be shortened, and the manufacturing cost can be saved because no cooling device is required.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

50: plate
100: HYPER
105: upper shaping surface
140: Lower mold
145: Lower molding surface
160: Blank holder
200: Feed Preheating Unit
210: Rotary motor
220: Socket
230: Preheating case
250: Fixed guide unit
260: guide rod
270: clamper
280: Clamping actuator
300: controller

Claims (13)

A composite molding press apparatus for molding a high-strength steel plate,
An upper mold having an upper molding surface for molding the plate material into a predetermined shape and fixed on the upper slider;
A lower mold having a lower molding surface corresponding to the upper molding surface and fixed to the bolster;
A blank holder disposed on the bottom of the bolster and rising and lowering through a cushion spring;
When the plate to be formed is inserted into one side of the blank holder, the plate is transferred to a molding position between the upper and lower molds, and the upper molding surface of the upper mold and the lower molding surface of the lower mold are preheated to a predetermined temperature A transfer preheating unit; And
A fixing guide unit which is provided on the other side of the blank holder and fixes a tip end of the plate to move up and down the plate according to the operation of the upper mold when the plate to be formed by the transfer preheating unit is put into a molding position;
To form a composite molding press. The method according to claim 1,
The transfer preheating unit
A rotating motor fixed on the bolster in correspondence with one side of the blank holder;
A socket fixed to a tip of a rotary shaft connected to the rotary motor; And
A preheating case connected to the socket and having a heat source therein, for preheating a plate material to be introduced through the opening;
Wherein the press forming device comprises: 3. The method of claim 2,
The preheating case
Wherein the upper molding surface of the upper mold and the lower molding surface of the lower mold are preheated by using the heat source. 3. The method of claim 2,
The heat source
Wherein the high-frequency induction heater is an infrared or infrared lamp that is installed inside the preheating case. 3. The method of claim 2,
The rotating motor
And a servo motor capable of controlling the rotational direction and the number of revolutions. The method according to claim 1,
The fixed guide unit
A guide rod vertically installed on the bolster in correspondence with the other side of the blank holder;
A clamper which is integrally formed on a slider moving along the guide rod and in which a leading end of a sheet material to be inserted is inserted;
A return spring for providing an upward bearing force of the clamper in a state of being fitted to the guide rod; And
A clamping actuator formed at one side of the clamper and fixing the tip end of the plate material fitted to the clamper with a fixing pin;
Wherein the press forming device comprises: The method according to claim 6,
The fixed guide unit
And a temperature sensor installed inside the clamper for detecting the temperature of the plate material. A composite molding press method for molding a high-strength steel plate,
Feeding a plate to be formed into the transfer preheating unit;
The transfer preheating unit is rotated and transferred to a forming position between the upper mold and the lower mold in a state that the plate is inserted, and fixing the tip of the plate to the stationary guide unit;
Preheating the sheet material, the upper molding surface of the upper mold and the lower molding surface of the lower mold to a predetermined temperature through the transfer preheating unit;
When the upper molding surface of the upper mold and the lower molding surface of the lower mold are preheated to a predetermined temperature, the transfer preheating unit is rotated and released from the molding position while the tip of the plate is fixed to the fixed guide unit; And
Molding the plate material into a predetermined shape by combining the upper and lower molds;
≪ / RTI > 9. The method of claim 8,
The step of transferring the plate material to the forming position between the upper and lower molds and fixing the tip of the plate material to the stationary guide unit
The preheating case of the transfer preheating unit is rotated through the rotation motor of the transfer preheating unit and transferred to the molding position between the upper mold and the lower mold to fix the tip of the plate to the fixing guide unit Wherein the composite molding press method comprises the steps of: 9. The method of claim 8,
The step of fixing the leading end of the plate to the stationary guide unit
Fitting the tip end of the plate material to the clamper of the stationary guide unit; And
Operating the clamping actuator of the fixed guide unit to fix the tip end of the plate material fitted to the clamper through the fixing pin;
Wherein the press forming step comprises the steps of: 9. The method of claim 8,
The step of preheating the plate material, the upper molding surface of the upper mold and the lower molding surface of the lower mold to a predetermined temperature
Wherein the step of preheating the plate, the upper molding surface of the upper mold and the lower molding surface of the lower mold to a predetermined temperature by using a heat source formed inside the preheating case included in the transfer preheating unit. 9. The method of claim 8,
The step of rotating the conveying preheating unit and leaving the conveying preheating unit at the forming position while the leading end of the plate material is fixed to the stationary guide unit
Wherein the preheating case of the conveying preheating unit is rotated through the rotation motor of the conveying preheating unit while the leading end of the plate material is fixed to the fixed guide unit and is released from the forming position. 9. The method of claim 8,
The step of molding the plate material into a predetermined shape by combining the upper and lower molds
Lowering the clamper of the stationary guide unit in a state where the plate member is fitted along the guide rod of the stationary guide unit by the lowering of the upper mold; And
Molding the plate material into a predetermined shape through the upper molding surface of the upper mold and the lower molding surface of the lower mold with the plate material sandwiched by the clamper;
Wherein the press forming step comprises the steps of:

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