JP2016175094A - Press molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a press molding machine.SOLUTION: A press molding machine 1 includes an upper die 2, a lower die 3 to be engaged with the upper die 2, a handling device 5 for performing three-dimensional movement operation of at least either of the upper die 2 and the lower die 3, and a clamper device 7 for performing mold closing of the upper die 2 and the lower die 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a press molding machine that forms, for example, a steel plate into a predetermined shape.

  For example, in automobile parts, due to the increasing demand for weight reduction, high tension of steel plates constituting the parts is being actively performed. Since a high-tensile steel plate has high strength, a spring back is generated in press forming at room temperature, and it is difficult to obtain desired dimensional accuracy. In such a case, hot press forming (die quench method) is performed in which a steel plate heated by a heating device is put into a press die, and the steel plate is cooled and quenched while being formed with the press die.

  In hot press forming, since a heated high-temperature steel sheet is soft and highly ductile, it is possible to form a complicated shape with high dimensional accuracy. Further, there is an advantage that high strength of the steel sheet by martensitic transformation can be achieved at the same time as forming by press forming after heating the steel sheet to the austenite region and quenching (quenching) in the mold.

  As forming equipment for hot press forming, as disclosed in Patent Document 1, a heating furnace for heating a work, a press forming machine for forming a heated work, and a work heated in the heating furnace are heated. There is one provided with a transport device for transporting the processed workpiece to a press molding machine. Among these, the press molding machine includes a mold composed of an upper mold and a lower mold, and a hydraulic press machine that moves the upper mold up and down (see FIG. 1 and paragraph 0030 of the same document). The hydraulic press is provided at an upper position of the upper die, and lowers the upper die at the time of molding and raises the upper die when the molding is completed.

  In this press molding facility, a workpiece heated in a heating furnace is supplied to a die of a press molding machine by a conveying device. Specifically, the transfer device places the work on the lower die in a state where the upper die is separated above the lower die by the hydraulic press machine. In this case, the upper mold needs to be separated largely upward from the lower mold so that the conveying device does not come into contact.

JP 2013-22596 A

  In the conventional press molding machine, in order to move the upper mold up and down, a large hydraulic press is used. Furthermore, the press forming machine tends to increase in size due to the fact that the hydraulic press is provided above the upper die. Moreover, in order to supply a workpiece | work to a metal mold | die with a conveying apparatus, it is necessary to fully space apart an upper mold | type from the lower mold | type, which also caused the enlargement of a press molding machine. Thus, the conventional press molding machine still has a problem in terms of space saving in factories and the like.

  In view of the above circumstances, the problem to be solved by the present invention is to reduce the size of a press molding machine.

  A press molding machine according to the present invention is for solving the above-described problems, and includes an upper mold, a lower mold engaged with the upper mold, and at least one of the upper mold and the lower mold in a three-dimensional manner. And a clamper device for clamping the upper die and the lower die.

  In the present invention, a handling device that moves one or both of the upper die and the lower die in a three-dimensional manner without using a conventional hydraulic press is employed. The case where the upper die is moved by the handling device will be described as an example. The handling device can move the upper die not only in the vertical direction but also in the horizontal direction. For this reason, when the workpiece is placed on the lower die, the upper die does not need to be separated to the upper position of the lower die as in the prior art, and the horizontal direction does not interfere with the placement of the workpiece. It is also possible to move the upper mold to the position. Further, since the upper die is moved by the handling device, it is not necessary to move the upper die up and down, and a smaller clamper device than the conventional hydraulic press machine can be adopted. In addition, the clamper device does not need to be provided at the upper position of the upper mold, and therefore can be provided at a position close to the lower mold. As described above, in the present invention, the press molding machine can be miniaturized as much as possible, which greatly contributes to space saving in a factory or the like.

  In the present invention, it is desirable that the handling device is configured to be detachable from at least one of the upper mold and the lower mold.

  Thus, by making the handling device detachable with respect to the upper mold or the like, it is possible to improve the workability by separating these when performing maintenance on the handling device or the upper mold. . For example, in hot press molding, the heated workpiece is cooled (quenched) by the upper mold and the lower mold. Conversely, the upper mold and the lower mold are heated by the workpiece during the cooling. For this reason, it is necessary to cool (natural cooling) these for the next shaping | molding. On the other hand, if the handling device is configured to be detachable from the upper mold or the like, these can be exchanged at each press forming. Therefore, if a plurality of upper molds and lower molds are prepared in advance, the press molding machine can always use a cooled upper mold or the like, and the work efficiency of press molding can be greatly improved.

  According to the present invention, the press molding machine can be reduced in size.

1st Embodiment of a press molding machine is shown and the state before press molding is shown. It is a side view of the press molding machine during press molding. It is sectional drawing which shows a coupling apparatus. It is a side view which shows 2nd Embodiment of a press molding machine. (A) The figure shows the state before press molding, and (b) the figure shows the state during press molding.

  Hereinafter, embodiments for carrying out a press molding machine according to the present invention will be described with reference to the drawings.

  1 to 3 show a first embodiment of a press molding machine according to the present invention. In the present embodiment, the press molding machine 1 includes a mold 4 including an upper mold 2 and a lower mold 3, a handling device 5 that three-dimensionally operates the upper mold 2, and the handling device 5 and the upper mold 2. A coupling device 6 that is detachably connected and a plurality of clamper devices 7 that clamp the upper die 2 and the lower die 3 are provided.

  The upper mold 2 has a forming surface 2a for forming a workpiece W made of, for example, a steel plate. Further, the upper die 2 includes a device 8 (hereinafter referred to as “holding device”) that holds the workpiece W in a state before being engaged with the lower die 3. The holding device 8 includes a plurality of holding arms 9 that hold the workpiece W. The holding arm 9 can be changed in posture by a not-shown actuator (for example, an air cylinder) to a holding posture (see FIG. 1) for holding the workpiece W and a standby posture (see FIG. 2) for retreating from the holding posture. Configured.

  The lower mold 3 is supported by a support base 10 disposed on the installation surface. The lower mold 3 supports a molding surface 3 a for molding the workpiece W together with the molding surface 2 a of the upper mold 2, a guide surface (guide surface) 3 b for guiding the upper mold 2, and a part of the clamper device 7. And a support portion 3c.

  The handling device 5 is constituted by, for example, a multi-axis multi-joint type robot. The handling device 5 includes a first joint 11 that supports the upper mold 2, a first arm 12 that is coupled to the first joint 11, a second arm 13 that supports the first arm 12, a first arm 12, and a first arm 12. A second joint 14 that connects the two arms 13, a base 15 that supports the second arm 13, and a third joint 16 that connects the second arm 13 and the base 15 are provided.

  The handling device 5 moves the upper die 2 three-dimensionally by 6-axis control using the first joint 11 to the third joint 16. That is, the handling device 5 includes two axes for swinging and turning (rotating in a horizontal plane) of the second arm 13 by the third joint 16, one axis for swinging the first arm 12 by the second joint 14, and the first joint. The upper die 2 is operated by the three-axis control by 11. The base 15 of the handling device 5 is fixed to the installation surface at the side position of the lower mold 3.

  As shown in FIG. 1, the coupling device 6 includes a first attachment 17 provided on the handling device 5 and a second attachment 18 provided on the upper mold 2.

  As shown in FIG. 3, the first attachment 17 mainly includes a main body portion 17 a configured in a plate shape, a piston 19 provided in the main body portion 17 a, and a ball 20 operated by the piston 19. The main body portion 17a mainly includes a fixing portion 21 that fixes the distal end portion of the handling device 5, a first passage 22 that holds the piston 19 slidably, and a second passage 23 that holds the ball 20 movably. Prepare.

  The fixing portion 21 has a hole 24 through which the tip of the handling device 5 can be inserted. As shown in FIG. 3, the distal end portion of the handling device 5 is inserted into the hole 24 and is detachably fixed to the first attachment 17 by fixing means such as a screw member (not shown). The first passage 22 guides the piston 19 along the axial direction at the tip of the handling device 5. The first passage 22 can be supplied with a working fluid (for example, air, oil, etc.) in order to reciprocate the piston 19. The second passage 23 communicates with the first passage 22 and guides the ball 20 in a direction orthogonal to the first passage 22.

  The piston 19 is operated by a working fluid supplied to the first passage 22 to operate the ball 20 and fix the ball 20 at a predetermined position (position shown in FIG. 3). The position can be changed to the retracted position for releasing the match.

  The position of the ball 20 can be changed to a fixed position (see FIG. 3) where the second attachment 18 is fixed (locked) to the first attachment 17 and a release position where the fixation is released by operating the piston 19. The ball 20 is urged toward the first passage 22 by an urging member 25 made of an elastic body. As shown in FIG. 3, the ball 20 is operated by the piston 19, moves in the second passage 23 so as to be separated from the first passage 22, and engages with the second attachment 18. When the piston 19 moves from the fixed position to the retracted position, the ball 20 moves in the second passage 23 so as to approach the first passage 22 by the action of the biasing member 25. By this movement, the engagement between the ball 20 and the second attachment 18 is released, and the connection between the first attachment 17 and the second attachment 18 is released.

  The second attachment 18 includes a plate-like main body 18 a that is fixed to the upper mold 2. The main body portion 18a is integrally fixed to the upper mold 2, but may have a detachable configuration. The main body 18 a has a locking portion 26 that is locked by the ball 20 in the first attachment 17. The locking portion 26 has an inclined surface (cam surface) 27 that is inclined at a predetermined angle. As shown in FIG. 3, when the piston 19 of the first attachment 17 moves to the fixed position and the ball 20 operated by the piston 19 moves to the back side of the second passage 23, the inclined surface 27 is The ball 20 is locked. When the locking portion 26 is locked by the ball 20, the second attachment 18 is fixed (locked) to the first attachment 17.

  In addition to the above configuration, the coupling device 6 includes positioning means 28 for positioning the first attachment 17 and the second attachment 18. The positioning means 28 includes a positioning pin 29 provided in the main body portion 17a of the first attachment 17, and an insertion hole 30 formed in the main body portion 18a of the second attachment 18 and through which the positioning pin 29 is inserted. .

  The clamper device 7 includes a clamper body 31, a first moving device (elevating device) 32 that moves the clamper body 31 in the vertical direction, and a second moving device that moves the clamper body 31 and the first moving device 32 in the horizontal direction ( Horizontal movement device) 33.

  The clamper body 31 is made of, for example, a metal plate member. The clamper body 31 can clamp the mold 4 by pressing the upper surface of the upper mold 2 (the upper surface of the upper mold 2 with the molding surface 2a facing downward). In the present embodiment, the first moving device 32 includes a cylinder device (for example, a hydraulic cylinder device), but is not limited thereto, and other various actuators can be used. The first moving device 32 is supported by the second moving device 33 and is configured to move the piston rod 34 in the vertical direction. A clamper body 31 is fixed to the tip of the piston rod 34. When the piston rod 34 moves up and down, the clamper main body 31 comes into contact with the mold 4 (upper mold 2 and lower mold 3) in the vertical direction (clamping position) and the mold 4 The position can be changed to the position where the mold clamping is released (the mold clamping release position).

  The second moving device 33 supports the first moving device 32 and can move the first moving device 32 and the clamper body 31 in the horizontal direction by a guide mechanism (not shown). The second moving device 33 is supported by a support portion 3 c provided on the lower mold 3. Thereby, the clamper main body 31 can change the position in the horizontal direction into the position which clamps the metal mold | die 4 (refer FIG. 2), and the stand-by position (refer FIG. 1) which waits away from this position.

  Hereinafter, the press molding method by the press molding machine 1 having the above configuration will be described. The hot press molding method will be described below, but the present invention is not limited to this, and the press molding machine 1 can be used for various molding methods such as cold press molding and warm press molding.

  First, the workpiece W is heated by a heating furnace (not shown). When heated to a predetermined temperature, the workpiece W is taken out from the heating furnace and conveyed to a position near the press molding machine 1 by a conveying device (not shown) such as a belt conveyor. The handling device 5 supports the upper die 2 via the coupling device 6 and brings the upper die 2 closer to the workpiece W of the transport device. The handling device 5 stops the upper mold 2 at a position above the workpiece W, operates the holding device 8, and holds the workpiece W with the holding arm 9 as a holding posture.

  When the handling device 5 holds the workpiece W by the holding device 8, the handling device 5 moves the upper die 2 together with the workpiece W to an upper position of the lower die 3. As shown in FIG. 1, the handling device 5 arranges the workpiece W and the upper mold 2 at an upper position of the lower mold 3, and then lowers them toward the lower mold 3. The holding device 8 releases the holding of the workpiece W by the holding arm 9 when the workpiece W reaches a position directly above the lower mold 3. At this time, the holding arm 9 is in a standby posture, and the workpiece W is placed on the molding surface 3 a of the lower mold 3. Note that the clamper device 7 moves the clamper body 31 and the first moving device 32 to the standby position by the second moving device 33 so as not to contact the holding arm 9 (see FIG. 1).

  Thereafter, the handling device 5 further lowers the upper mold 2 and engages it with the lower mold 3. At this time, the side surface of the upper mold 2 is guided by the guide surface 3b of the lower mold 3, and the molding surface 2a moves downward. By this movement, the molding surface 2 a of the upper mold 2 comes into contact with the workpiece W placed on the molding surface 3 a of the lower mold 3 and sandwiches the workpiece W together with the molding surface 3 a of the lower mold 3.

  Next, the clamper device 7 operates the second moving device 33 to move the clamper body 31 and the first moving device 32 in the standby position in the horizontal direction so as to approach the lower mold 3 and the upper mold 2. When the clamper main body 31 and the first moving device 32 move to the upper position of the lower die 3 and the upper die 2 engaged with the lower die 3, the clamper device 7 operates the first moving device 32 to lower the clamper main body 31. . Thereby, the clamper main body 31 contacts and presses the upper part (upper surface) of the upper mold 2. At this time, the plurality of clamper bodies 31 press the upper mold 2 in synchronization. By this pressing, the upper mold 2 gradually descends, and the workpiece W is subjected to predetermined molding by the molding surface 2a of the upper mold 2 and the molding surface 3a of the lower mold 3. When the upper die 2 is sufficiently lowered, the clamper main body 31 is in a state where the upper portion of the upper die 2 and the upper portion of the lower die 3 are pressed (clamping state) as shown in FIG. The workpiece W is cooled by the upper mold 2 and the lower mold 3 during the molding, and is quenched by this. The press molding of the workpiece W is completed by clamping the mold for a predetermined time.

  According to the press molding machine 1 according to the present embodiment described above, since the upper die 2 is moved three-dimensionally by the handling device 5, the hydraulic pressure provided above the upper die 2 as in the prior art. There is no need to move the upper die 2 up and down by the type press. Since the handling device 5 is disposed not on the lower die 3 but on the side, in the press molding machine 1, a large structure (such as a hydraulic press) is disposed above the lower die 3. There is no. Further, the clamper device 7 which is separate from the handling device 5 does not need to move the upper die 2 up and down, so that it is smaller than the conventional hydraulic press machine and is located close to the lower die 3. Provided. As described above, the press molding machine 1 is smaller as a whole than the conventional one.

  Further, since the holding device 8 provided in the upper die 2 can directly hold and transport the heat-treated workpiece W, the workability of press molding can be greatly improved.

  FIG. 4 shows a second embodiment of the press molding machine. In 1st Embodiment, although the example which operates the upper mold | type 2 with the handling apparatus 5 was shown, in this embodiment, the example which operates the lower mold | type 3 is shown. As shown in FIGS. 4A and 4B, the handling device 5 is connected to the lower mold 3 through a coupling device 6.

  The upper mold 2 is fixed at a predetermined position with the molding surface 2a facing downward. In addition to the molding surface 2 a, the upper die 2 has a guide surface 2 b that guides the lower die 3, and a support portion 2 c that supports the second moving device 33 of the clamper device 7. In the first embodiment, the clamper device 7 is configured such that the clamper body 31 presses against the upper mold 2, but in this embodiment, the clamper body 31 is configured so as to press the lower mold 3. . In the present embodiment, the holding device 8 illustrated in the first embodiment is not provided in the mold 4.

  Hereinafter, a method for forming the workpiece W in the present embodiment will be described. In order to form the workpiece W by the press molding machine 1 according to the present embodiment, the workpiece W heated by the heating furnace is transported to the vicinity of the press molding machine 1 by the transport device. The handling device 5 supports the lower mold 3 with the molding surface 3a facing upward, and the workpiece W transported from the transport device is placed on the molding surface 3a by another handling device (material handling device). Placed.

  When the workpiece W is placed on the lower mold 3, the handling device 5 moves the lower mold 3 and places it at a position below the upper mold 2 as shown in FIG. The mold 3 is raised to approach the upper mold 2. The lower die 3 is raised by an operation by the handling device 5 and is engaged with the upper die 2. Thereafter, the lower mold 3 moves so that the molding surface 3 a approaches the molding surface 2 a of the upper mold 2 while the side surface thereof is guided by the guide surface 2 b of the upper mold 2. When the lower die 3 is further raised and the workpiece W placed on the lower die 3 comes into contact with the molding surface 2a of the upper die 2, clamping by the clamper device 7 is started.

  The second moving device 33 of the clamper device 7 moves the clamper body 31 and the first moving device 32 at the standby position in the horizontal direction and moves them to the lower position of the lower mold 3. Thereafter, the clamper device 7 operates each first moving device 32 to raise each clamper body 31 simultaneously. Thereby, each clamper main body 31 contacts the lower surface of the lower mold | type 3, and presses upwards. When the lower mold 3 is pressed against the clamper body 31, the molding surface 3 a gradually rises, and the workpiece W is molded together with the molding surface 2 a of the upper mold 2. When the lower die 3 is sufficiently raised, the clamper main body 31 is in a state where the lower portion of the upper die 2 and the lower portion of the lower die 3 are pressed (clamped state) as shown in FIG. The workpiece W is formed into a predetermined shape while being cooled by the upper die 2 and the lower die 3.

  In the present embodiment, a plurality of lower molds 3 are prepared, and the press molding machine 1 can perform press molding by exchanging the lower molds 3 every time. In the hot press molding, after the molding is completed, it is necessary to sufficiently cool (natural cooling) the lower mold 3 in preparation for the next molding. In this regard, if a plurality of lower molds 3 can be used, the heated lower mold 3 can be replaced with another sufficiently cooled lower mold 3 after completion of molding. Thus, since the press molding machine 1 can always use the cooled lower mold 3, it becomes possible to perform press molding efficiently.

  In addition, the press molding machine which concerns on this invention is not limited to the structure of the said embodiment. Further, the press molding machine according to the present invention is not limited to the above-described effects. The press molding machine according to the present invention can be variously modified without departing from the gist of the present invention.

  In the above embodiment, the example in which only the upper die 2 is moved by the handling device 5 (first embodiment) and the example in which only the lower die 3 is moved by the handling device 5 (second embodiment) are shown. However, the present invention is not limited to this. In addition to these, both the upper mold 2 and the lower mold 3 may be moved by the handling device 5. In this case, the handling apparatus 5 includes a first handling apparatus that operates the upper mold 2 and a second handling apparatus that operates the lower mold 3. Moreover, in said 2nd Embodiment, although the example which press-forms using the several lower mold | type 3 was shown, it is not limited to this, Even if it press-molds using several upper mold | types 2, Good.

  In the first embodiment, the example in which the holding device 8 having the holding arm 9 is provided in the upper mold 2 has been described. However, the holding device 8 is not limited to this example, and for example, works using a magnetic force by an electromagnet or the like. W may be held in the upper mold 2 and other various holding means may be used. Further, the holding device 8 may be omitted, and the workpiece W may be placed on the lower mold 3 by another handling device. Further, after the press molding is completed, the workpiece W may be taken out from the lower mold 3 by this handling device.

  In the above-described embodiment, the coupling device 6 has a structure using the piston 19 and the ball 20, but the present invention is not limited to this, and various other connecting means can be used. Further, the coupling device 6 may be omitted, and the upper die 2 or the lower die 3 may be fixed to the handling device 5.

  In the above embodiment, the handling device 5 is exemplified by a multi-axis multi-joint type robot, but is not limited thereto. The handling device 5 only needs to have an elevating mechanism that moves up and down at least one of the upper mold 2 and the lower mold 3 and a horizontal movement mechanism that moves horizontally.

1 Press molding machine 2 Upper mold 3 Lower mold 5 Handling device
6 Coupling device 7 Clamper device

Claims (2)

Upper mold,
A lower mold engaged with the upper mold;
A handling device that three-dimensionally moves and operates at least one of the upper mold and the lower mold;
A press molding machine comprising a clamper device for clamping the upper mold and the lower mold.   The press forming machine according to claim 1, wherein the handling device is configured to be detachable from at least one of the upper mold and the lower mold.

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