JP2015100810A - Press molding apparatus and hot press molding equipment including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press molding apparatus which shortens cycle time of press molding to improve productivity, and hot press molding equipment including the press molding apparatus.SOLUTION: A press molding apparatus includes: a first stationary die 11 having a molding surface; a second stationary die 12 disposed spaced apart from the first stationary die 11 and having a molding surface; and a movable mold 13 which is provided so as to be slidable between the first stationary die 11 and the second stationary die 12, and which has a molding surface that holds a metal plate between itself and the molding surface of the first stationary die 11 to perform press molding, and a molding surface that holds a metal plate between itself and the molding surface of the second stationary die 12 to perform press molding.

Description

  The present invention relates to a press forming apparatus that performs press forming on a metal plate and a hot press forming facility including the press forming apparatus.

  Press forming is a method of forming a metal plate into a predetermined shape, and is used, for example, for forming a steel plate part of an automobile body. For example, a press forming apparatus (hot press processing apparatus) disclosed in Patent Document 1 forms a metal plate into a predetermined shape by setting a metal plate on a lower mold and then lowering and clamping the upper mold. . Thereafter, the upper mold is raised and the mold is opened, the molded metal plate is taken out, and a new metal plate is set on the lower mold. Thus, in the conventional press molding apparatus, the movable mold (upper mold) is slid to the fixed mold side to perform mold clamping, and the movable mold is slid to the side away from the fixed mold to perform mold opening.

JP 2005-271038 A

  In the automobile manufacturing process and the like, cost reduction by improving productivity is required, and in the press molding process of automobile parts, further reduction in cycle time is required.

  The technical problem to be solved by the present invention is to improve productivity by shortening the cycle time of press molding.

  The present invention made to solve the above-described problems is a press molding apparatus that performs press molding on a metal plate, and is disposed apart from a first fixed mold having a molding surface and a first fixed mold. The second fixed mold having a molding surface and the first fixed mold and the second fixed mold are slidably provided, and a metal plate is sandwiched between the molding surfaces of the first fixed mold and press molded. And a movable mold having a molding surface that is press-molded by sandwiching a metal plate between the molding surface and the molding surface of the second fixed mold.

  According to this press molding apparatus, the movable mold is slid to the first fixed mold (or the second fixed mold) to form the movable mold forming surface and the first fixed mold forming surface (or the movable mold forming surface and the second fixed mold). At the same time, the metal plate is sandwiched between the molding surface of the stationary mold and the molding surface of the movable mold and the molding surface of the second stationary mold (or the molding surface of the movable mold and the molding surface of the first stationary mold). And mold can be opened. As a result, the cycle time can be shortened as compared with the conventional press molding apparatus in which the movable mold is reciprocated to open the clamping mold.

  The above press forming apparatus can be suitably incorporated in a hot press forming facility provided with a heating device for heating a metal plate. In this hot press forming facility, a metal plate heated by a heating device is carried between one fixed mold and a movable mold, these molds are clamped and press molded, and then the mold clamped state is kept as it is. By holding, the metal plate can be cooled and quenched. In this way, while the molded product is being quenched with one fixed mold and the movable mold, the molded product is unloaded in the space between the other fixed mold and the movable mold that has been opened. Cycle time can be further shortened by carrying in a simple steel plate.

  As described above, according to the press molding apparatus of the present invention and the hot press molding equipment equipped with the same, cycle time can be shortened and productivity can be increased.

It is a side view of the hot press molding equipment in which the press molding device of the present invention was incorporated. It is a front view of the hot press molding equipment of FIG. It is an expanded sectional view of a fluid pressure drive cylinder. It is a side view which shows the procedure of the press molding method by the hot press molding equipment of FIG. It is a side view which shows the procedure of the press molding method by the hot press molding equipment of FIG. It is a side view which shows the procedure of the press molding method by the hot press molding equipment of FIG. It is a side view which shows the procedure of the press molding method by the hot press molding equipment of FIG. It is a side view which shows the procedure of the press molding method by the hot press molding equipment of FIG. It is a side view which shows the procedure of the press molding method by the hot press molding equipment of FIG. It is a side view which shows the procedure of the press molding method by the hot press molding equipment of FIG.

  Hereinafter, embodiments of a press molding apparatus of the present invention will be described with reference to the drawings. In the present embodiment, for example, a case will be described in which the press molding apparatus of the present invention is incorporated into a hot press molding facility used in a die quench method.

  1 and 2 show a hot press forming facility in which the press forming apparatus of the present invention is incorporated. The hot press forming facility 10 includes a press forming device 1, a heating device 2 provided above the press forming device 1, a discharge device 3 provided below the press forming device 1, and a metal plate (this embodiment). In the embodiment, it is provided with a conveying device 4 that supports and conveys the steel plate W). In FIG. 2, the first fixed mold 11 and the second fixed mold 12 are not shown.

  The press molding apparatus 1 of the present embodiment is provided with a press mold that opens the mold clamping in the horizontal direction. As shown in FIG. 1, the press mold includes a first fixed mold 11, a second fixed mold 12 that is spaced apart from the first fixed mold 11 in the horizontal direction, a first fixed mold 11, and a second fixed mold 11. It is comprised with the movable mold | type 13 which slides in a horizontal direction between the fixed mold | types 12. FIG. The first fixed mold 11 and the second fixed mold 12 are provided fixed to the frame 101 via a fixed plate 14. The movable mold 13 has a movable plate 13a, a first movable mold 13b fixed to one side of the movable plate 13a, and a second fixed mold 13c fixed to the other side of the movable plate 13a. Hereinafter, the sliding direction of the movable mold 13 is referred to as “mold opening / closing direction”.

  The first fixed mold 11, the second fixed mold 12, and the movable mold 13 are each provided with a forming surface for press-forming the steel plate W. In the illustrated example, a convex molding surface 11a is formed on the first fixed mold 11, a concave molding surface 12a is formed on the second fixed mold 12, and these molding surfaces 11a and 12a face each other in the mold opening / closing direction. ing. The first movable mold 13b is formed with a concave molding surface 13b1 that faces the convex molding surface 11a of the first fixed mold 11 in the mold opening / closing direction, and the second fixed mold 13c has a concave mold surface of the second fixed mold 12. A convex molding surface 13c1 that faces the molding surface 12a is formed. A cooling water channel (not shown) is provided inside each die of the press die.

  The press molding apparatus 1 is provided with driving means 16 for sliding the movable mold 13 in the mold opening / closing direction. In the present embodiment, a fluid pressure drive cylinder (referred to as drive cylinder 16a; hereinafter the same) that drives the movable mold 13 by fluid pressure is used as the drive means 16. As shown in FIG. 1, the drive means 16 includes a drive cylinder 16a fixed to the movable plate 13a, and a guide rail 16b that guides the slide direction of the drive cylinder 16a and the movable plate 13a.

  The guide rail 16b extends in the mold opening / closing direction and is spanned between the pair of fixed plates 14 (see FIG. 1). In the present embodiment, guide rails 16b are provided at the four corners of the rectangular fixed plate 14, and a drive cylinder 16a is provided on each guide rail 16b (see FIG. 2). As shown in FIG. 3, the guide rail 16b is provided with a flange portion 16b1 accommodated inside the drive cylinder 16a. The flange portion 16b1 allows the inside of the drive cylinder 16a to be connected to the first space 16c and the first space 16c. It is divided into two spaces 16d. The drive cylinder 16a is provided with a first inflow / outlet port 16e that allows the working fluid L to flow into and out of the first space 16c, and a second inflow / outlet port 16f that allows the working fluid L to flow into and out of the second space 16d. A seal member 16g for preventing leakage of the working fluid L filled in the drive cylinder 16a is provided at the opening of the drive cylinder 16a.

  Moreover, the recessed part (17a, 17b, 17c) is mutually formed in the lower end of the clamping surface of the 1st fixed mold | type 11, the 2nd fixed mold | type 12, and the movable mold | type 13 (refer FIG. 1). Thus, in a state where the mold is clamped, a support member 31 of the transfer device 3 described later is accommodated in a space formed by these recesses (17a, 17b, 17c).

  The heating device 2 is provided above the press molding device 1 and is slidable in the mold opening / closing direction. The heating device 2 of this embodiment is a heating furnace that heats the steel sheet W with a heater. The upper surface and the lower surface of the heating device 2 are each provided with a carry-in port and a carry-out port (not shown). The heating device 2 is not limited to a heating furnace, and may be, for example, an electric heating device.

  The conveyance device 3 includes a support member 31 that supports the steel plate W from below, and an elevating unit (in this embodiment, an elevating cylinder 32) that drives the support member 31 up and down. In the present embodiment, the transport device 3 is provided near both ends in the width direction (left-right direction in FIG. 2) of the press molding device 1, for example. Each transport device 3 can be moved in the mold opening and closing direction by a moving means (not shown).

  The discharge device 4 discharges the formed steel plate W to the outside of the hot press forming facility 10, and has an endless belt 41, a drive roller 42, and a driven roller (not shown), for example, as shown in FIG. Consists of a belt conveyor.

  Hereinafter, the procedure of the press forming method by the hot press forming equipment 10 in which the press forming apparatus 1 of the present invention is incorporated will be described.

  First, as shown in FIG. 4, with the first fixed mold 11 and the movable mold 13 being opened, the steel plate W is carried between them. Specifically, as shown in FIG. 5, the support member 31 is raised by the elevating cylinder 32 (see FIGS. 1 and 2) and disposed immediately below the heating device 2. Then, the steel plate W heated to a predetermined temperature by the heating device 2 is dropped by its own weight and supported from below by the support member 31 of the transport device 3. In this state, the support member 31 is lowered by the elevating cylinder 32, and the steel plate W is disposed in the space (forming position) between the first fixed mold 11 and the first movable mold 13b (see FIG. 6). On the other hand, a new steel plate W2 is input to the heating device 2 from which the steel plate W has been unloaded, and heating is started. During this time, the movable mold 13 is held in a state of being pressed against the second movable mold 12 by the drive cylinder 16a.

  Thereafter, the drive cylinder 16a was driven to slide the movable mold 13 toward the first fixed mold 11 (left side in the figure), and the first fixed mold 11 and the first movable mold 13b were clamped to heat them. The steel plate W is press-formed. Specifically, the working fluid L is caused to flow into the first space 16c from the first inlet / outlet 16e of the drive cylinder 16a, and the working fluid L in the second space 16d is caused to flow out from the second inlet / outlet 16f (see FIG. 3). ). As a result, the pressure of the working fluid L in the first space 16c increases, and the drive cylinder 16a and the movable mold 13 slide to the left in the drawing (see FIG. 7). Thereby, the steel plate W is clamped between the convex molding surface 11a of the first fixed mold 11 and the concave molding surface 13b1 of the first movable mold 13b, and is press-formed into a predetermined shape. At this time, the support member 31 of the transport device 3 is accommodated in a space formed by the recess 17a of the first fixed mold 11 and the recess 17b of the first movable mold 13b. Even when the press forming of the steel plate W is completed, the state of maintaining the pressure of the working fluid L in the first space 16c in the drive cylinder 16a is maintained. Thereby, the 1st fixed mold | type 11 and the 1st movable mold | type 13b are locked with a mold-clamped state. Thus, the press-formed steel sheet W is held in a state of being sandwiched between the first fixed mold 11 and the first movable mold 13b, and cooled (quenched).

  As described above, by sliding the movable mold 13 to the left in the figure, the first fixed mold 11 and the first movable mold 13b are clamped, and at the same time, the second fixed mold 12 and the second movable mold 13c are molded. Opened. And as shown in FIG. 8, while arrange | positioning the heating apparatus 2 above the space between the 2nd fixed mold | type 12 and the 2nd movable mold | type 13c which opened the mold, the conveying apparatus 3 is arrange | positioned under the said space. . Then, in the same manner as described above, the steel plate W2 heated by the heating device 2 is lowered while being supported by the support member 31, and is disposed in the space (forming position) between the second fixed mold 12 and the second movable mold 13c. (See FIG. 9).

  Then, the drive cylinder 16a is driven, the movable mold 13 is slid to the second fixed mold 12 side (right side in the figure), and the second fixed mold 12 and the second movable mold 13c are clamped (see FIG. 10). Specifically, the working fluid L flows into the second space 16d from the second inflow / outlet port 16f of the drive cylinder 16a, and the working fluid L in the first space 16c flows out of the first inflow port 16e (see FIG. 3). ). As a result, the pressure of the working fluid L in the second space 16d increases, and the drive cylinder 16a and the movable mold 13 slide to the right in the drawing. Thereby, the steel plate W2 is sandwiched between the concave molding surface 12a of the second fixed mold 12 and the convex molding surface 13c1 of the second movable mold 13c, and is press-formed into a predetermined shape. After the second fixed mold 12 and the movable mold 13 are clamped, the pressure of the working fluid L in the second space 16d in the drive cylinder 16a is maintained, and the second fixed mold 12 and the movable mold 13 are maintained. And lock with the mold clamped. Thereby, the steel plate W2 is cooled (quenched) by the second fixed mold 12 and the second movable mold 13c.

  As described above, by sliding the movable mold 13 to the right side in the figure, the second fixed mold 12 and the second movable mold 13c are clamped, and at the same time, the first fixed mold 11 and the first movable mold 13b are molded. It is opened (see FIG. 10). At this time, the steel plate W press-formed by the first fixed mold 11 and the movable mold 13 has already been quenched. Then, the press-formed steel sheet W is dropped by its own weight by opening the first fixed mold 11 and the first movable mold 13b, and is placed on the belt 41 of the unloading apparatus 4 disposed below the press-forming apparatus 1. And is carried out of the hot press forming facility 10 (see the arrow in FIG. 10). By repeating the above operations, press forming of the steel sheet W is sequentially performed.

  As described above, in the press forming apparatus 1 described above, the movable mold 13 is slid toward the first fixed mold 11 to clamp the first fixed mold 11 and the first movable mold 13b and press the steel plate W. Simultaneously with the molding, the second fixed mold 12 and the second movable mold 13c can be opened (see FIG. 7). Further, by sliding the movable mold 13 toward the second fixed mold 12, the second fixed mold 12 and the second movable mold 13 c are clamped to press the steel plate W, and at the same time, the first fixed mold 11 and the second fixed mold 12 are pressed. The 1 movable mold 13b can be opened (see FIG. 10). That is, since the mold clamping and mold opening can be performed simultaneously by sliding the movable mold 13 to one side, compared with the conventional press molding apparatus in which the movable mold is reciprocated to perform mold clamping and mold opening. The cycle time is shortened.

  Further, according to the press forming apparatus 1 described above, the first fixed mold 11 and the first movable mold 13b (or the second fixed mold 12 and the second movable mold 13c) are quenched into the steel plate W formed by clamping. The second fixed mold 12 and the second movable mold 13c (or the first fixed mold 11 and the first movable mold 13b) are opened while the formed steel sheet W is carried out and a new steel sheet is removed. Can carry in. Thus, the cycle time can be further shortened by simultaneously performing quenching and carrying in and out of the steel sheet.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the case where the sliding direction (mold opening / closing direction) of the movable mold 13 is the horizontal direction is shown, but the present invention is not limited thereto, and the mold opening / closing direction may be the vertical direction, for example.

  In the present embodiment, the case where one movable mold 13 is provided between the first fixed mold 11 and the second fixed mold 12 is shown, but the present invention is not limited to this, and the first fixed mold 11 and the first fixed mold 11 Two or more movable molds 13 may be provided between the two fixed molds 12.

  In the above-described embodiment, the case where the fluid pressure driving cylinder 16a that slides with the movable mold 13 is used as the driving means 16 that slides the movable mold 13, but the driving means 16 is not limited thereto. For example, the movable plate 13 may be configured to slide by disposing a telescopic cylinder on the fixed plates 14 and 14 and pressing the movable die 13 in the mold opening / closing direction by an extension operation of each cylinder. In addition, the driving means 16 may be configured by a ball screw mechanism or a rack and pinion mechanism.

DESCRIPTION OF SYMBOLS 1 Press molding apparatus 10 Hot press molding equipment 11 1st fixed mold 12 2nd fixed mold 13 Movable mold 13a Movable plate 13b 1st fixed mold 13c 2nd fixed mold 16 Drive means 16a Drive cylinder (fluid pressure drive cylinder)
16b Guide rail 2 Heating device 3 Conveying device 31 Support member 4 Discharge device W Steel plate L Working fluid

Claims (2)

A press molding apparatus that performs press molding on a metal plate,
A first fixed mold having a molding surface, a second fixed mold that is spaced apart from the first fixed mold and has a molding surface, and is slidable between the first fixed mold and the second fixed mold. Press forming with a metal plate sandwiched between the molding surface of the first fixed mold and a molding surface sandwiched between the molding surface of the first fixed mold and a molding surface of the second fixed mold And a movable mold having a molding surface to be pressed.   A hot press forming facility comprising a heating device for heating the metal plate and the press forming device according to claim 1 for forming the metal plate heated by the heating device.

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