JP5984300B2 - Hot press forming equipment - Google Patents

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. In particular, so-called ultra-high-tensile steel (super high-tensile material) exceeding 1000 MPa cannot often obtain desired dimensional accuracy by press molding at room temperature. In such a case, hot press forming (die quench method) in which a heated steel plate is put into a press die, and the steel plate is cooled and quenched while being formed with the press die has been studied.

  A press forming facility for performing hot press forming usually includes a heating device for heating a steel plate, a press die for press forming the heated steel plate, and a transport device for transporting the heated steel plate from the heating device to the press die. Therefore, the equipment tends to increase in size. For example, the hot press molding facility disclosed in Patent Document 1 integrates a heating device (electric heating mechanism) and a press molding device (press molding mechanism), thereby reducing the facility area and saving space. I am trying.

JP 2009-142852 A

  In the hot press forming facility of Patent Document 1 above, a heating device (electric heating mechanism) and a press forming device (hot press mechanism) are arranged horizontally, and the steel plates are conveyed horizontally in a flat state. Since the heated steel sheet is soft with a reduced hardness, the steel sheet is likely to be deformed while being conveyed from the heating apparatus to the press forming apparatus. In order to prevent such deformation during conveyance of the steel plate, the above-described conveyance device is a large-sized device that supports both ends of the steel plate with support portions (clamps 53a to 53c). Moreover, since the center part of a steel plate will bend if a steel plate is laid flat and the both ends are supported, the hot press apparatus of the said patent document 1 is provided with the support rod between the heating apparatus and the press molding apparatus. Yes. As described above, the conventional hot press forming equipment has a large conveying device and a support rod, and thus there is a limit to downsizing the equipment.

  From the above situation, the technical problem to be solved by the present invention is to further reduce the size of the hot press forming equipment.

  The present invention made in order to solve the above-mentioned problems is a hot press forming facility for performing press forming on a heated steel plate, a press mold for opening a mold in a horizontal direction, and the press forming apparatus. A hot press forming facility comprising a heating device disposed above, and a conveying device that has a support member that supports the steel plate and conveys the steel plate heated by the heating device to a forming position by the press mold. Is to provide.

  Thus, by disposing the heating device above the press mold, the facility area can be reduced as compared with the case where these are arranged horizontally. Moreover, since the mold clamping opening direction of the press mold is set to the horizontal direction and the heating device is arranged above the plate, the steel plate heated by the heating device can be lowered and supplied to the press mold, The apparatus is sufficient to have a support member that supports the falling of the steel sheet by its own weight. Accordingly, the size of the apparatus can be reduced as compared with the conventional conveying device having the support portions that support both ends of the steel plate, and the support rod that supports the bending due to the weight of the flat steel plate is not required.

  In the above hot press forming facility, if a discharge device is provided below the press mold, the steel plate press-formed by the press mold can be transferred to the discharge device using the transfer device. .

  In the above hot press forming equipment, if a concave portion capable of accommodating the support member of the conveying device is provided on the mold clamping surface of the press mold while being clamped, the press is performed while the steel plate is supported by the support member. Press molding can be performed by clamping the mold.

  As described above, according to the hot press forming facility of the present invention, the conveying device can be miniaturized and the entire facility can be made compact.

It is a side view of the hot press molding equipment concerning one embodiment of the present invention. It is a front view of the said hot press molding equipment. It is sectional drawing which shows a locking mechanism. It is sectional drawing of a heating apparatus. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment. It is a side view which shows the procedure of the hot press molding method by the said hot press molding equipment.

  Hereinafter, embodiments 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 an embodiment of the present invention includes a press forming device 10, a heating device 20 provided above the press forming device 10, and a press forming device. 10 is provided with a discharge device 30 provided below 10 and a transport device 40 that supports and transports the steel plate W.

  The press molding apparatus 10 has a press mold 11 that opens a mold clamping in the horizontal direction. As shown in FIG. 1, the press die 11 of the present embodiment includes a fixed die 11a and a plurality of movable slidable in the horizontal direction (first movable die 11b, second movable die 11c in the illustrated example, And the third movable mold 11d). The fixed mold 11 a is fixed to the fixed plate 15. The first movable mold 11b to the third movable mold 11d can slide in the horizontal direction along the slide rail 16, respectively. The third movable mold 11d is connected to the hydraulic cylinder 18 via the movable plate 17, and is driven in the horizontal direction. A convex molding surface 12a is formed on the right side of the fixed mold 11a in the drawing. In the first movable mold 11b and the second movable mold 11c, a concave molding surface 12b is formed on the left surface in the drawing, and a convex molding surface 12a is formed on the right surface in the drawing. A concave molding surface 12b is formed on the left surface of the third movable mold 11d. A cooling water channel (not shown) is formed inside each of the molds 11a to 11d. 2, illustration of the fixed plate 15, the movable plate 17, and the hydraulic cylinder 18 is omitted.

  The press mold 11 is provided with a lock mechanism 13 that locks adjacent molds in a clamped state. The attachment / detachment of each lock mechanism 13 is controlled by a lock control unit (not shown). In the illustrated example, lock mechanisms 13 are provided at both upper and lower ends of the press die 11 in the width direction (left and right direction in FIG. 2). For example, as shown in FIG. 3, the lock mechanism 13 is attached to a rotating shaft 13a attached to one adjacent mold (for example, the first movable die 11b), a pin 13b extending from the rotating shaft, and a tip of the pin 13b. And a locking portion 13c. The rotating shaft 13a can be rotated by a rotation driving unit (not shown). The pin 13b can be expanded and contracted by an expansion / contraction drive unit (not shown). In the unlocked state, as shown by a dotted line in FIG. 3, the locking portion 13c is retracted from the other mold (for example, the fixed mold 11a). From this state, the rotation shaft 13a is rotated in the counterclockwise direction in the figure by the rotation driving portion (see arrow A), and the locking portion 13c is fitted into the recess 13d provided in the other mold. . Further, by retracting the pin 13b with the expansion / contraction drive part (see arrow B), the locking part 13c is moved to the right side in the figure and engaged with the side wall of the recess 13d, so that adjacent molds (in the illustrated example) The fixed mold 11a and the first movable mold 11b) are biased in the mold clamping direction.

  As shown in FIG. 1, concave portions 14 are formed at positions facing each other on the clamping surfaces of the respective molds of the press mold 11. In the example of illustration, the recessed part 14 is formed in the lower end of the clamping surface of each metal mold | die. In a state where the mold is clamped, a support member 41 of the transfer device 40 described later can be accommodated in the space formed by these recesses 14.

  The heating device 20 is attached to the slide rail 21 and is slidable in the direction in which the press mold 11 is closed (the left-right direction in FIG. 1). The heating device 20 of the present embodiment is a heating furnace that heats a steel plate with a heater. Specifically, as shown in FIG. 4, a heater 23 provided inside the case 22, a heat holding material 24 covering the heater 23, and a heat insulating material laid between the heat holding material 24 and the case 22. 25. A carry-in port 22a and a carry-out port 22b are provided on the upper and lower surfaces of the case 22, respectively. The carry-in port 22a and the carry-out port 22b communicate with each other in the vertical direction through the through hole 22c. A heater 23, a heat retaining material 24, and a heat insulating material 25 are provided on both sides of the through hole 22c in the horizontal direction. Opening / closing members 26a and 26b capable of opening and closing the carry-in port 22a and the carry-out port 22b are provided. The heating device 20 is not limited to a heating furnace, and may be, for example, an electric heating device.

  The discharge device 30 discharges the formed steel sheet to the outside of the hot press forming facility 1. For example, as shown in FIG. 1, a belt having an endless belt 31, a drive roller 32, and a driven roller (not shown). Consists of a conveyor.

  The transport apparatus 40 includes a support member 41 that supports the steel plate W, and drive means (in this embodiment, a drive cylinder 42) that drives the support member 41 up and down. In this embodiment, the conveying apparatus 40 is provided in the width direction (left-right direction of FIG. 2) both ends vicinity of a press die, for example. Each conveying device 40 can be slid in the mold clamping mold opening direction of the press mold 11 (left and right direction in FIG. 1) by a driving means (not shown).

  The support member 41 supports the weight drop of the steel plate W. In the illustrated example, the support member 41 supports the steel plate W from below. Specifically, it has a bottom portion 41a with which the lower end of the steel plate W abuts and a pair of side portions 41b extending upward from both ends of the upper surface of the bottom portion 41a. The steel plate W is supported from below at the bottom 41a and supported from both sides in the horizontal direction by a pair of side portions 41b. The drive cylinder 42 can stop the support member 41 at a desired height, and is constituted by an electric cylinder, for example.

  Hereinafter, the procedure of the hot press molding method by the hot press molding facility 1 will be described. In the following description, among the lock mechanisms 13 provided in the press die 11, a lock mechanism that locks the fixed mold 11a and the first movable mold 11b is referred to as 13A, and the first movable mold 11b and the second movable mold 11c. A lock mechanism for locking is indicated by 13B, and a lock mechanism for locking the second movable mold 11c and the third movable mold 11d is indicated by 13C.

  First, a procedure for hot press forming the steel plate W1 with the fixed mold 11a and the first movable mold 11b will be described. At this time, as shown in FIG. 5, the press mold 11 locks the lock mechanisms 13B and 13C to integrate the first movable mold 11b to the third movable mold 11d, and unlocks the lock mechanism 13A. The fixed mold 11a and the first movable mold 11b are opened. And the heating apparatus 20 with which the steel plate W1 was thrown in is arrange | positioned above the space between the fixed mold | type 11a and the 1st movable mold | type 11b. At this time, the carry-in port 22a and the carry-out port 22b of the heating device 20 are sealed by the opening / closing members 26a and 26b, and the steel plate W is heated inside the sealed space. The support member 41 of the transport device 40 is disposed below the space between the fixed mold 11a and the first movable mold 11b.

  Then, as shown in FIG. 6, the support member 41 is lifted by the drive cylinder 42 (see FIGS. 1 and 2) and disposed immediately below the heating device 20. When the steel plate W1 is heated to a predetermined temperature, the opening / closing member 26b of the carry-out port 22b of the heating device 20 is opened, the heated steel plate W1 is lowered by its own weight, and supported by the support member 41 of the transport device 40 from below. In this state, the support member 41 is lowered by the drive cylinder 42, and the steel plate W1 is disposed in the space (forming position) between the fixed mold 11a and the first movable mold 11b as shown in FIG. The heating device 20 from which the steel plate W1 has been unloaded closes the opening / closing member 26b of the carry-out port 22b, opens the opening / closing member 26a of the carry-in port 22a, and a new steel plate W2 is introduced from the carry-in port 22a. And the opening-and-closing member 26a of the entrance 22a is closed, the heating apparatus 20 is sealed, and the heating of the steel plate W2 is started.

  Thereafter, as shown in FIG. 8, the hydraulic cylinder 18 (see FIG. 1) is driven to drive the first to third movable molds 11b to 11d integrally to the left side in the drawing, and the fixed mold 11a and the first movable mold 11b. And mold. Thereby, while the steel plate W1 is shape | molded by the predetermined shape, cooling (hardening) of the steel plate W1 is started by contact with metal mold | die 11a, 11b. At this time, the support member 41 of the transport device 40 is accommodated in a space formed by the recess 14 of the fixed mold 11a and the recess 14 of the first movable mold 11b. Thereby, press molding can be performed in a state where the steel plate W <b> 1 is supported by the support member 41. Note that the lower end of the steel plate W1 is not formed immediately after the start of forming because the lower end of the steel plate W1 is arranged in the space formed by the concave portion 14, but the upper and lower ends of the steel plate W1 are drawn toward the center side as the forming proceeds, so that the steel plate is finally formed. The lower end of W1 is drawn upward from the space formed by the concave portion 14, and is molded by the fixed mold 11a and the first movable mold 11b. When the mold clamping is completed, the fixed mold 11a and the first movable mold 11b are locked by the lock mechanism 13A, and the support member 41 is lowered below the press mold 11 by the drive cylinder 42.

  Next, the steel plate W2 is hot-press formed with the first movable mold 11b and the second movable mold 11c. Specifically, first, as shown in FIG. 9, the lock mechanism 13B is unlocked. Accordingly, the fixed mold 11a and the first movable mold 11b constitute a fixed mold, and the second movable mold 11c and the third movable mold 11d constitute a movable mold. And while opening the 1st movable mold | type 11b and the 2nd movable mold | type 11c, the heating apparatus 20 and the conveying apparatus 40 are slid, and the upper direction of the space between the 1st movable mold | type 11b and the 2nd movable mold | type 11c, respectively. And placed below. Then, the steel plate W2 is formed into a predetermined shape as shown in FIG. Further, through the same process using the second movable mold 11c and the third movable mold 11d, the steel plate W3 is formed into a predetermined shape as shown in FIG.

  Thus, while the steel plates W2 and W3 are being formed, the initially formed steel plate W1 is sufficiently cooled and quenched. And as shown in FIG. 12, the heating apparatus 20 and the conveying apparatus 40 are arrange | positioned at the upper direction and the downward direction of the shape | molded steel plate W1, respectively. In this state, the lock mechanism 13A is unlocked, and the first to third movable molds 11b to 11d are integrally slid by the hydraulic cylinder 18 (see FIG. 1), whereby the fixed mold 11a and the first movable mold 11b are Open the mold (see arrow). Then, the formed steel plate W1 falls due to its own weight and is supported from below by the support member 41 (see FIG. 13). When the support member 41 is lowered in this state, as shown in FIG. 14, the formed steel sheet W1 is placed on the belt 31 of the discharge device 30 and discharged to the outside of the hot press forming facility 1. . Then, the hot press molding of the heated steel plate W4 is performed by performing the processes of FIGS.

  Thereafter, similarly, the steel plate W2 formed by the first movable mold 11b and the second movable mold 11c is discharged from the hot press forming facility 1, and a new steel plate is hot press formed by these dies. Further, the steel plate W3 formed by the second movable die 11c and the third movable die 11d is discharged from the hot press forming facility 1, and a new steel plate is hot press formed by these dies (both not shown). ). By repeating the above steps, hot press forming of the steel sheet is sequentially performed.

  As described above, in the hot press forming facility 1 described above, the heating device 20 is provided above the press die 11 that opens the mold in the horizontal direction, thereby lowering the steel plate W heated by the heating device 20. It can be conveyed to the press die 11 only. Thereby, since the conveying device 40 is sufficient to support the weight of the steel plate W (for example, having a support member that supports the steel plate W from below), the conveying device 40 is simplified, Compactness is achieved. Furthermore, by providing the discharge device 30 below the press die 11, the steel plate W formed by the press die 11 can be transported to the discharge device 30 by the same transport device 40 as described above. No equipment is required, and the equipment can be made more compact.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the case where the movable mold is configured by three molds (the first movable mold 11b to the third movable mold 11d) is shown, but the present invention is not limited to this, and one or two movable molds are provided. Or you may comprise with four or more metal mold | dies. Moreover, in said embodiment, although the support member 41 has shown the structure which supports the steel plate W from the downward direction, it is good also as a structure which hold | maintains not only this but hold | maintaining the upper end of the steel plate W, for example. . In the above embodiment, the steel plate W formed by the press die 11 is transported to the discharge device 30 by the transport device 40. However, the present invention is not limited to this. The steel plate W formed with the opening may be freely dropped onto the discharge device 30.

W (W1 to W4) Steel plate 1 Hot press forming equipment 10 Press forming device 11 Press mold 11a Fixed mold 11b First movable mold 11c Second movable mold 11d Third movable mold 13 Lock mechanism 14 Recess 15 Fixed plate 16 Slide rail 17 Movable plate 18 Hydraulic cylinder 20 Heating device 30 Discharge device 40 Conveying device 41 Support member 42 Drive cylinder

Claims (3)

A hot press forming facility for press forming a heated steel plate,
A press mold that opens the mold in a horizontal direction, a heating device disposed above the press molding device, and a support member that supports the steel plate, the steel plate heated by the heating device being the press die Hot press forming equipment equipped with a transfer device that transfers to the forming position by the mold.   The hot press forming equipment according to claim 1, wherein a discharge device is provided below the press die, and the steel plate formed by the press die is transferred to the discharge device by the transfer device.   The hot press molding equipment according to claim 1, wherein a recess capable of accommodating the support member in a clamped state is provided on a clamp surface of the press mold.

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