JP2015080796A - Hot press molding facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot press molding facility.SOLUTION: A hot press molding facility 1 comprises: a press die 21 for mold opening and mold closing in a horizontal direction; and a heating device 3 disposed above the press die 21 and heating a steel plate W transported therein. The heating device 3 comprises holding means 6 having a rotary shaft 61 and a support part 63 disposed on the rotary shaft 61, and by rotation of the rotary shaft 61, the support part 63 can be moved between a support position where the steel plate W transported in the heating device 3 can be supported from a lower part by the support part, and a retreat position where the support part 63 retreats from a lower part of the steel plate W.

Description

  The present invention relates to a hot press forming facility.

  For example, in an automobile body, due to an increase in demand for weight reduction, an increase in the tension of a steel plate constituting the body is being actively performed. Since a high-tensile steel plate has high strength, it is difficult to form it into a predetermined shape by ordinary press forming. Therefore, adoption of hot press molding (die quench method) has been studied (for example, Patent Document 1).

JP 2009-142852 A

  Since the die quench method requires dedicated equipment such as a heating device, the equipment tends to increase in size. Therefore, the applicant of the present application has already proposed a hot press forming facility of a type that opens and closes a die in the horizontal direction for the purpose of downsizing the hot press forming facility (Japanese Patent Application No. 2012-241037).

  This hot press forming equipment includes a press mold that opens the mold in the horizontal direction, a heating device disposed above the press mold, and a transport device that transports the steel plate heated by the heating device to the press mold. It is equipped with. A carry-in port for carrying a steel plate into the inside is provided above the heating device, and a carry-out port for carrying out the steel plate from the inside is provided below the heating device. A carry-in port provided above the heating device is opened, and a steel plate is supplied from the carry-in port into the heating device. After the supplied steel sheet is heated in the heating device, the carry-out port provided below the heating device opens, and is dropped by its own weight below the heating device. The dropped steel sheet can be supplied to the press die by descending while being supported from below by a support member provided in the transport device.

  As described above, the hot press forming facility described above enables space saving by disposing the heating device above the press die. On the other hand, when applied to an actual production line, further improvement is desired for carrying in and carrying out the steel sheet into the heating device. That is, the above hot press forming equipment (Japanese Patent Application No. 2012-241037) is not shown about the structure which positions and holds the steel plate supplied in the heating apparatus.

  In view of such circumstances, the present invention is to provide a hot press forming facility capable of positioning and holding a steel plate heated in a heating device with a simple structure.

  The present invention, which has been made to solve the above-mentioned problems, includes a press mold that opens a clamping mold in a horizontal direction, and a heating device that is disposed above the press mold and heats a steel sheet carried into the interior. It is a hot press forming facility equipped with a holding means having a rotating shaft and a supporting portion provided on the rotating shaft, which is disposed in the heating device, and rotating the rotating shaft, thereby supporting the supporting portion. The steel plate carried into the heating device can be moved between a support position where the steel plate can be supported from below and a retreat position where the steel plate is retracted from below the steel plate.

  Thus, by providing the holding device in the heating device, the lower portion of the steel sheet carried into the heating device can be positioned and held by the support portion of the holding device. Moreover, the holding | maintenance of a steel plate can be cancelled | released by rotating a rotating shaft and retracting the support part which is supporting the steel plate from a steel plate.

  You may make it carry in a steel plate to a heating apparatus with a holding means. By carrying the steel plate supported by the support part provided in the holding means into the heating device, the steel plate can be positioned and held at a predetermined position in the heating device. Thus, by carrying in the steel plate into the heating device by the holding means, it is not necessary to provide a separate carry-in device for carrying the steel plate into the heating device, so that the equipment can be simplified.

  Moreover, you may provide the carrying-in apparatus which carries in a steel plate inside a heating apparatus. Thereby, a steel plate can be carried in in a heating apparatus, with the holding means installed in the heating apparatus. That is, the steel plate can be carried into the heating device without exposing the rotation shaft and the support portion provided in the holding means to the outside of the heating device, so that the rotation shaft and the support portion of the holding means are outside the heating device. There is no cooling. Thereby, it can prevent that the temperature in a heating apparatus falls by carrying in the heating apparatus the rotating shaft and support part which were cooled outside the heating apparatus.

  From the above, according to the present invention, it is possible to provide a hot press forming facility that can hold and carry out a steel sheet carried into a heating device with a simple structure.

It is a side view of the hot press molding equipment concerning a first embodiment of the present invention. It is a front view of the hot press molding equipment of FIG. FIG. 2 is a side cross-sectional view of the heating device of FIG. 1, showing a state where a support portion of a holding unit is in a retracted position. FIG. 2 is a side cross-sectional view of the heating device of FIG. 1, showing a state where a support portion of a holding unit is in a support position. It is a side view which shows the procedure of the hot press molding method which concerns on 1st embodiment of the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method which concerns on 1st embodiment of the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method which concerns on 1st embodiment of the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method which concerns on 1st embodiment of the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method which concerns on 1st embodiment of the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method which concerns on 2nd embodiment of the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method which concerns on 2nd embodiment of the said hot press molding equipment.

  Hereinafter, hot press molding equipment according to a first embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, a hot press forming facility 1 according to the first embodiment of the present invention includes a press forming device 2, a heating device 3 provided above the press forming device 2, and heating. A conveying device 4 provided below the device 3 and a loading device 5 provided below the conveying device 4 and carrying the steel plate W into the heating device 3 are provided.

  The press molding apparatus 2 has a press die 21 that opens the mold in the horizontal direction. As shown in FIG. 1, the press die 21 includes a fixed die 2a and a movable die 2b that can slide in the horizontal direction. The fixed mold 2 a is fixed to the fixed plate 22. The movable mold 2b is slidable in the horizontal direction along the slide rail 23. The movable mold 2b is connected to the hydraulic cylinder 25 via the movable plate 24 and is driven in the horizontal direction. A convex molding surface 2a1 is formed on the right surface of the fixed mold 2a in the drawing. On the other hand, a concave molding surface 2b1 is formed on the left surface of the movable mold 2b in the drawing. A cooling water flow passage (not shown) is formed inside the fixed mold 2a and the movable mold 2b.

  The heating device 3 is disposed above the press die 21 and is fixed to the frame 7. The heating device 3 is a heating furnace that heats a steel plate with a heater. Specifically, as shown in FIG. 3, a heater 32 provided inside the case 31, a heat holding material 33 covering the heater 32, and a heat insulating material spread between the heat holding material 33 and the case 31. 34. An insertion hole 3 c into which the steel plate W carried into the heating device 3 is inserted is formed inside the case 31. A guide rail 35 is provided in the insertion hole 3 c formed in the heating device 3, and the steel plate W is carried in / out along the guide rail 35. On both sides in the horizontal direction of the insertion hole 3c, a heater 32, a heat retaining material 33, and a heat insulating material 34 are provided. The heating device 3 is not limited to a heating furnace, and may be, for example, an electric heating device.

  The upper surface 3a of the case 31 is closed by holding means 6 described later. On the other hand, a carry-in / out port 3 b 1 for the steel plate W is formed on the lower surface 3 b of the case 31. The loading / unloading port 3b1 can be opened / closed by opening / closing means (in the present embodiment, the conveying device 4). In the present invention, as shown in FIG. 2, four holding means 6 are provided at equal intervals in the width direction of the heating device 3 (left and right direction in FIG. 2), and each holding means 6 is an attachment member. 64 are integrally provided. By attaching the attachment member 64 to the upper surface 3 a of the case 31, the upper surface 3 a of the case 31 is closed. The attachment member 64 is provided so as to be detachable from the case 31, and at the time of maintenance of the holding means 6, the four holding means 6 can be detached from the case 31 at once by removing the attachment member 64 from the case 31. it can.

  As shown in FIGS. 3 and 4, the holding unit 6 includes a rotating shaft 61 provided with a support portion 63 that supports the steel plate W, and a rotating unit 62 that rotates the rotating shaft 61. The rotating shaft 61 and the support portion 63 are arranged inside the heating device 3, and the rotating means 62 is exposed on the upper surface 3 a of the heating device 3. The rotating shaft 61 is rotatably provided by the rotating means 62. The support portion 63 is provided so as to protrude outward in the radial direction of the rotating shaft 61. By driving the rotating means 62 provided on the upper surface 3a of the heating device 3, the support portion 63 together with the rotating shaft 61 moves between the retracted position shown in FIG. 3 and the support position shown in FIG. Thereby, when the steel plate W is carried into the heating device 3, the rotation means 62 is driven to rotate the rotation shaft 61 of the holding means 6, and the support portion 63 is moved from the retracted position (FIG. 3) to the support position (FIG. 4). ), The lower part of the steel plate W is supported.

  The conveying device 4 is provided below the heating device 3 and is provided so as to be slidable on the slide rail 4c provided on the frame 7 in the horizontal direction (see FIG. 1). Thereby, it can move between the heating apparatus 3 and the press die 21. The conveying device 4 is provided with a holding hole 41 for holding the steel plate W carried out from the heating device 3 and an insertion hole 42 through which the steel plate W carried into the heating device 3 is inserted. Between the holding hole 41 and the insertion hole 42 of the conveying device 4, a closing portion 43 for closing the loading / unloading port 3b1 provided on the lower surface 3b of the heating device 3 is provided, and the conveying device 4 is slid in the horizontal direction. By doing so, the loading / unloading port 3b1 can be opened and closed. The holding hole 41 is provided with a receiving portion (not shown) that receives the steel plate W carried out of the heating device 3. Opening and closing members 41 a and 41 b for opening and closing the holding hole 41 are provided above and below the holding hole 41. On the other hand, the insertion hole 42 provided in the conveying device 4 is arranged so as to be positioned below the loading / unloading port 3b1 of the heating device 3 when the holding hole 41 is positioned above the press die 21. .

  The carry-in device 5 is provided below the heating device 3, and specifically, is disposed so as to face the vertical direction of the carry-in / out port 3b1 provided on the lower surface 3b of the heating device 3 (see FIG. 5). As shown in FIGS. 1 and 2, the carry-in device 5 includes a support member 51 that supports the lower side of the steel plate W, and drive means that drives the support member 51 up and down (in the present invention, the drive cylinder 52). . The steel plate W can be carried into the heating device 3 by supporting the steel plate W on the support member 51 and raising the support member 51. In the hot press molding facility 1 of the present invention, three carry-in devices 5 are provided at equal intervals in the width direction of the press mold 21 (left-right direction in FIG. 2). The support member 51 has a size that allows the insertion hole 42 of the transport device 4 and the loading / unloading port 3b1 of the heating device 3 to be inserted.

  Hereinafter, the procedure of the hot press molding method according to the first embodiment of the hot press molding facility 1 will be described with reference to FIGS. 5-9, the guide rail in the heating apparatus 3 is abbreviate | omitted and shown.

  First, the conveying device 4 is arranged at the position shown in FIG. 5, and the insertion hole 42 is arranged below the loading / unloading port 3 b 1 of the heating device 3. At this time, since the carry-in device 5 is disposed below the heating device 3, the carry-in / out port 3 b 1 of the heating device 3, the insertion hole 42 of the transport device 4, and the support member 51 of the carry-in device 5 are arranged in the vertical direction. Arranged side by side. And the raising / lowering means 52 of the carrying-in apparatus 5 is driven, the steel plate W supported by the support member 51 is raised, and the steel plate W is carried in into the heating apparatus 3. FIG. At this time, since the support member 51 is large enough to be inserted through the insertion hole 42 and the loading / unloading port 3b1, the steel plate W can be carried into the heating device 3 while being supported by the support member 51.

  The steel plate W carried into the heating device 3 is carried along the guide rail 35 (see FIG. 4). When the steel plate W is carried into a predetermined position in the heating device 3, the rotating means 62 is driven and the rotating shaft 61 is rotated, whereby the support portion 63 provided on the rotating shaft 61 is retracted as shown in FIG. The position is moved to the support position shown in FIG. Thus, the steel plate W is supported from below by the support portion 63 and is held at a predetermined position in the heating device 3.

  After the steel plate W is held in the heating device 3, the support member 51 is lowered, the support member 51 is pulled out from the heating device 3, and the support member 51 is separated from the insertion hole 42 of the transport device 4. After the support member 51 is separated from the transport device 4, the transport device 4 is slid leftward in the drawing as shown in FIG. Due to the movement of the transfer device 4, the insertion hole 42 arranged below the loading / unloading port 3 b 1 moves to the left side in the figure, and instead, the closing portion 43 of the conveying device 4 is disposed below the loading / unloading port 3 b 1. . Thereby, the inside of the heating apparatus 3 is sealed, and the heating of the steel plate W is started. Since the closing part 43 of the transport device 4 is provided with a heat insulating material, heat in the heating device 3 can be prevented from being released to the outside through the closing part 43. On the other hand, a new steel plate W2 to be heated next is supported on the support member 51.

  As shown in FIG. 7, after the heating of the steel plate W, the conveying device 4 is further slid leftward in the figure, and the holding hole 41 is disposed below the loading / unloading port 3b1. Then, the opening / closing member 41 a above the holding hole 41 is opened, and the loading / unloading port 3 b 1 and the holding hole 41 are communicated. At this time, the opening / closing member 41b below the holding hole 41 is closed. After the carry-in / out port 3b1 and the holding hole 41 are communicated with each other, the rotating means 62 is driven to rotate the rotating shaft 61 of the holding means 6, and the support portion 63 is moved from the holding position shown in FIG. 4 to the retracted position shown in FIG. And the holding of the steel plate W is released. Thereby, the steel plate W falls by its own weight and is carried out of the heating device 3. The steel plate W carried out from the heating device 3 is held by a receiving portion (not shown) provided in the holding hole 41. After the steel plate W is held in the holding hole 41, the opening / closing member 41 a provided on the upper portion of the holding hole 41 is closed, and the holding hole 41 is sealed. Thereby, since the steel plate W is not exposed outside, it can reduce that the temperature of the steel plate W falls.

  After the steel plate W is accommodated in the holding hole 41, as shown in FIG. 8, the conveying device 4 is moved in the right direction in the figure, and the holding hole 41 is moved above the press die 21. At this time, the fixed mold 2a and the movable mold 2b of the press mold 21 are opened, and the holding hole 41 is positioned above the space between the fixed mold 2a and the movable mold 2b. After the holding hole 41 is disposed above the space between the fixed mold 2 a and the movable mold 2 b, the opening / closing member 41 b provided at the lower part of the holding hole 41 is opened, and the steel plate W is discharged from the holding hole 41. The discharged steel plate W is supported by a support means (not shown), and is disposed in a space (forming position) between the fixed mold 2a and the movable mold 2b of the press mold 21. After the steel plate W is discharged from the holding hole 41, the opening / closing member 41b below the holding hole 41 is closed.

  After the steel plate W is put into the press die 21, the hydraulic cylinder 25 provided on the movable plate 24 of the press die 21 is driven to move the movable die 2b in the left direction in FIG. Thereby, the steel plate W thrown into the space between the fixed mold 2a and the movable mold 2b is press-formed into a predetermined shape. At this time, the steel sheet W is formed into a predetermined shape, and cooling (quenching) of the steel sheet W is started by contacting the fixed mold 2a and the movable mold 2b.

  At this time, the insertion hole 42 of the conveying device 4 is disposed below the loading / unloading port 3 b 1 of the heating device 3. Therefore, the support member 51 on which the new steel plate W2 is supported is raised while being put into the press die 21 from the holding hole 41 of the transport device 4 as described above, and the inside of the heating device 3 is raised. It is possible to carry in the steel plate W2. As shown in FIG. 9, after carrying in the steel plate W2 in the heating apparatus 3, the conveyance apparatus 4 is moved to the left in FIG. 9, and the closing part 43 is arranged below the carry-in / out port 3b1 so that the inside of the heating apparatus 3 And the heating of the steel plate W2 is started. By repeating the above steps, the steel sheet W is heated and formed sequentially.

  As described above, in the hot press molding facility 1 according to the first embodiment, the holding unit 6 is provided in the heating device 3 fixed above the press die 21 and the rotating shaft 61 of the holding unit 6 is rotated. Thus, the lower portion of the steel plate W can be supported by the support portion 63, or the support portion 63 can be retracted from the steel plate W to release the support of the steel plate W. That is, the steel plate W can be positioned and held inside the heating device 3 and the steel plate W can be carried out of the heating device 3 simply by rotating the rotating shaft 61 of the holding means 6. The holding and unloading of W can be switched.

  Further, by providing the carry-in device 5 for carrying the steel plate W below the heating device 3, the transport device 5 can be driven to carry the steel plate W into the heating device 3. Thereby, since the holding means 6 can be installed in the heating device 3, it is not necessary to move the holding means 6 to the outside of the heating device 3 when carrying the steel sheet W into the heating device 3. Thereby, since the rotating shaft 61 and the support part 63 of the holding | maintenance means 6 are not cooled outside the heating apparatus 3, the steel plate W can be heated efficiently.

  Next, the hot press molding equipment 1 according to the second embodiment of the present invention will be described with reference to FIGS. 10 and 11. In addition, about the structure common with the hot press molding equipment 1 used for the hot press molding method which concerns on said 1st embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The hot press forming equipment 1 according to the second embodiment differs from the hot press forming equipment 1 according to the first embodiment in that, as shown in FIGS. 10 and 11, the holding means 6 is a heating device 3. The transfer device 4 includes a holding hole 41 for holding the steel plate W and a closing portion 43 for closing the loading / unloading port 3b1 provided on the lower surface 3b of the heating device 3. It is a point. The heating device 3 is provided with an attachment portion 3d to which the attachment member 64 of the holding means 6 is attached.

  In the hot press forming facility 1 according to the second embodiment, as shown in FIG. 10, when the holding hole 41 holding the steel plate W is disposed above the press mold 21, the hot press forming equipment 1 is provided in the heating device 3. The loading / unloading port 3b1 is closed by a closing portion 43 of the transfer device 4. At this time, by removing the holding means 6 from the heating device 3, a new steel plate W <b> 2 can be supported by the support portion 63 of the holding means 6.

  As shown in FIG. 11, while the steel plate W is discharged into the press die 21 and press forming is performed, the holding means 6 is attached to the heating device 3, and the support portion 63 on which the new steel plate W <b> 2 is supported is provided. And move to the inside of the heating device 3. After carrying in the new steel plate W2 in the heating apparatus 3, the heating of the steel plate W2 is started. An attachment member 64 is provided on the holding means 6, and the attachment member 64 is detachably provided on the attachment portion 3 d of the heating device 3. The rotating shaft 61 and the support portion 63 of the holding means 6 are moved into the heating device 3, and the attachment member 64 of the holding means 6 is fitted into the attachment portion 3 d of the heating device 3. Thereby, the steel plate W2 carried into the heating device 3 is positioned and held at a predetermined position in the heating device 3. After the heating of the steel plate W2, the conveying device 4 is moved leftward in FIG. The holding hole 41 of the transfer device 4 is disposed below the loading / unloading port 3b1 of the heating device 3, and after the loading / unloading port 3b1 and the holding hole 41 are communicated, the rotation unit 62 of the holding unit 6 is rotated to rotate the steel plate W2. Is released, and the steel plate W2 is carried out of the heating device 3. After the unloaded steel plate W2 is held in the holding hole 41 of the conveying device 4, the steel plate W2 is formed by repeating the above steps.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the loading / unloading port 3b1 of the heating device 3 is opened / closed by the movement of the conveying device 4 provided below the heating device 3, but the present invention is not limited to this, and the loading / unloading port 3b1 is connected to the heating device 3. Separate opening / closing means for opening / closing may be provided.

DESCRIPTION OF SYMBOLS 1 Hot press molding equipment 21 Press die 2a Fixed mold 2b Movable type 3 Heating device 3b1 Loading / unloading port 4 Conveying device 41 Holding hole 42 Insertion hole 43 Closure part 5 Loading device 51 Support member 6 Holding means 61 Rotating shaft 62 Rotating means 63 Support portion 64 Mounting member 7 Frame W Steel plate

Claims (3)

A hot press forming facility comprising a press die that opens a mold clamping in a horizontal direction, and a heating device that is disposed above the press die and heats a steel sheet carried into the interior,
A holding means having a rotating shaft and a supporting portion provided on the rotating shaft is provided in the heating device, and the supporting portion is placed inside the heating device by rotating the rotating shaft. A hot press forming facility characterized in that it can be moved between a support position capable of supporting a loaded steel sheet from below and a retreat position retracted from below the steel sheet.   The hot press forming equipment according to claim 1, wherein the holding means carries in the steel plate to the heating device. The hot press forming facility according to claim 1, further comprising a carry-in device for carrying a steel plate into the heating device.

Images