JP6051825B2 - Molding method and molding apparatus - Google Patents

Description

The present invention relates to molding equipment embodying the molding method and molding method.

  Conventionally, for example, a fuel cell is configured by alternately laminating membrane electrode assemblies and separators (see, for example, Patent Document 1). The fuel cell can obtain high output according to the number of laminated layers of the membrane electrode assembly and the separator.

JP 2006-228483 A

  By the way, for example, when a molded product such as a separator is punched from a plate-shaped workpiece using a machining member such as a mold, the machining member may be adjusted with high accuracy in advance. It is essential.

  If the processed member is tilted due to insufficient adjustment, if the molded product is punched and molded using the processed member, the dimensional accuracy of the molded product is biased. Even if a plurality of molded products with uneven dimensional accuracy are to be stacked, the uneven dimensional accuracy of each molded product accumulates in one direction, and it may be difficult to increase the number of layers.

The present invention has been made to solve the above problems, to provide a molding equipment embodying the molding method and molding method can be molded by punching accurately molded article from the workpiece Objective.

  In the molding method according to the present invention for achieving the above object, a molded product is punched from a plate-shaped workpiece. This forming method has a sandwiching step, a strain removing step, and a punching step. In the clamping step, a sealing part that has a space part between the punched part that opens a punched hole corresponding to the outer peripheral shape of the molded product and a workpiece and seals along the entire outer periphery of the punched hole The member to be processed is urged and clamped. In the strain removing step, the fluid filled in the space is pressurized to a first pressure at which the workpiece is not punched by the punching hole, and the strain generated in the workpiece is removed. In the punching step, the fluid is pressurized to a second pressure higher than the first pressure and the workpiece is punched by the punching hole, and the molded product is punched from the workpiece.

  The molding apparatus according to the present invention that achieves the above object punches a molded product from a plate-shaped workpiece. This molding apparatus has a clamping part, a filling part, and a control part. The clamping part is a sealing part that has a space part between the punched part that opens the punched hole corresponding to the outer peripheral shape of the molded product and the workpiece and seals along the entire outer periphery of the punched hole. The member to be processed is urged and clamped. The filling unit fills the space with a fluid. The control unit controls the operation of the filling unit. Here, the control unit pressurizes the fluid filled in the space to a first pressure at which the workpiece is not punched by the punching hole, removes the distortion generated in the workpiece, and then applies the fluid to the first pressure. The filling portion is controlled to pressurize to a second pressure at which the workpiece is punched by the punching hole at a higher pressure and punch the molded product from the workpiece.

  According to the molding method of the present invention configured as described above, a molded product is punched from a plate-shaped workpiece. Here, after the pressed member is pressed by the fluid pressurized at the first pressure to remove the distortion, the pressed member is pressed by the fluid pressurized to the second pressure higher than the first pressure. Further press to punch out the molded product. Therefore, for example, a molded product can be punched from a workpiece with high accuracy without depending on the adjustment accuracy of a workpiece such as a mold.

It is a schematic diagram which shows the processing machine provided with the shaping | molding apparatus which concerns on this embodiment in the rear part. It is an end elevation which shows the principal part of a shaping | molding apparatus from one side. It is an end elevation which shows the punching part and conveyance part which concern on the shaping | molding apparatus shown in FIG. 2, (a) is shown from one side surface, (b) is shown from the other side surface adjacent to one side surface. It is a flowchart which shows the shaping | molding process using a shaping | molding apparatus. It is an end elevation which shows the principal part of the shaping | molding apparatus which concerns on S1 and S2 of FIG. 4 from one side. It is a figure which shows the pressure value of the space part of the shaping | molding apparatus shown in FIG. It is an end elevation which shows the principal part of the shaping | molding apparatus which concerns on S3-S5 of FIG. 4 from one side. It is a figure which shows the pressure value of the space part of the shaping | molding apparatus shown in FIG. It is an end elevation which shows the principal part of the shaping | molding apparatus which concerns on S6 of FIG. 4 from one side. It is a figure which shows the pressure value of the space part of the shaping | molding apparatus shown in FIG. It is an end elevation which shows the principal part of the shaping | molding apparatus which concerns on the terminal of S6 of FIG. 4 from one side. It is a figure which shows the pressure value of the space part of the shaping | molding apparatus shown in FIG. It is an end elevation which shows the principal part of the shaping | molding apparatus which concerns on S7 of FIG. 4 from one side. It is a figure which shows the pressure value of the space part of the shaping | molding apparatus shown in FIG. It is an end elevation which shows the punching part and conveyance part which concern on the shaping | molding apparatus shown in FIG. 13, (a) is shown from one side surface, (b) is shown from the other side surface adjacent to one side surface. It is an end elevation which shows the principal part of the shaping | molding apparatus which concerns on S8 of FIG. 4 from one side. It is a figure which shows the pressure value of the space part of the shaping | molding apparatus shown in FIG. It is an end view which shows the punching part and conveyance part of the shaping | molding apparatus which concern on S9 of FIG. 4, (a) is shown from one side surface, (b) is shown from the other side surface adjacent to one side surface. FIG. 19 is an end view showing a punching unit and a conveying unit of the molding apparatus following the state illustrated in FIG. 18, where (a) is shown from one side surface and (b) is shown from the other side surface adjacent to one side surface. It is a time chart which shows the relationship (example 1) between the pressure of the water at the time of a shaping | molding process using a shaping | molding apparatus, and the position of the holding member 12. FIG. It is a time chart which shows the relationship (example 2) between the pressure of the water at the time of shaping | molding using a shaping | molding apparatus, and the position of the holding member 12. FIG. It is a time chart which shows the pressure (example 3) of the water at the time of the shaping | molding process using a shaping | molding apparatus. It is a time chart which shows the pressure (example 4) of the water at the time of the shaping | molding process using a shaping | molding apparatus. It is a perspective view which shows the molded article stamped and formed from the to-be-processed member with the shaping | molding apparatus.

  Hereinafter, the present embodiment will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The size and ratio of each member in the drawings are exaggerated for convenience of explanation and may be different from the actual size and ratio.

(This embodiment)
A molding method according to the present embodiment, a molding apparatus 1 that embodies the molding method, and a molded product 50a molded by the molding apparatus 1 will be described with reference to FIGS.

  First, the configuration of the molding apparatus 1 will be described with reference to FIGS. 1 to 3 including the configuration of the processing machine 100 provided with the molding apparatus 1 at the rear.

  FIG. 1 is a schematic diagram showing a processing machine 100 equipped with a molding apparatus 1 at the rear. FIG. 2 is an end view showing the main part of the molding apparatus 1 from one side. FIG. 3 is an end view showing the punching unit 10a and the unloading unit 40 according to the molding apparatus 1 shown in FIG. Fig.3 (a) has shown the punching part 10a and the carrying-out part 40 from one side. FIG. 3B shows the punching portion 10a and the carry-out portion 40 from the other side surface adjacent to one side surface.

  About the processing machine 100 provided with the shaping | molding apparatus 1, the structure is outlined. The processing machine 100 forms an opening or an unevenness in a region that becomes a molded product 50a shown in FIG. The opening corresponds to, for example, a cathode gas supply port 51 described later. The unevenness corresponds to, for example, a convex portion 57 described later. After a series of processing steps, the forming apparatus 1 performs an outer trim process corresponding to the final step. That is, the workpiece 50 is punched out by the molding apparatus 1 to mold the molded product 50a. The molding apparatus 1 is provided at the rear part of the processing machine 100. The processing machine 100 includes, for example, an upper mold 110, a lower mold 120, a coil 130, feeders 140 and 150, a feeder controller 160, a press controller 170, a high-pressure chamber 180, and a hydraulic controller 190.

  Using the upper mold 110 and the lower mold 120 of the processing machine 100, an opening or an unevenness is formed on the coil 130 corresponding to the sheet metal workpiece 50. A feeder 140 for carrying the coil 130 is provided on the upstream side of the upper mold 110 and the lower mold 120. On the other hand, a feeder 150 for carrying out the coil 130 is provided on the downstream side of the upper mold 110 and the lower mold 120. The feeder control unit 160 controls the carry-in speed and timing of the coil 130 by the feeder 140 and the carry-out speed and timing of the coil 130 that has become scrap by the feeder 150. The press control unit 170 controls the upper mold 110, which is a movable mold, to be urged against the lower mold 120, which is a fixed mold, and then separated from the lower mold 120. The hydraulic pressure control unit 190 sends a fluid from the high pressure chamber 180 to the molding apparatus 1.

  The molding apparatus 1 will be described in detail. The molding apparatus 1 punches a molded product 50a from a plate-shaped workpiece 50. In addition to the clamping part 10, the filling part 20, and the control part 30, the shaping | molding apparatus 1 has the carrying-out part 40, for example.

  The clamping unit 10 urges and clamps the workpiece 50.

  As shown in FIGS. 2 and 3, the clamping unit 10 urges and clamps the workpiece 50 by the punching unit 10a and the sealing unit 10b. The punching portion 10a opens a punching hole 11a corresponding to the outer peripheral shape of the molded product 50a. The punching part 10 a includes, for example, a lower mold 11, a holding member 12, a side support member 13, and a lower support member 14. The lower mold 11 is made of, for example, steel and is formed in a rectangular shape. In the center of the lower mold 11, an opening is made so as to penetrate the punching hole 11 a corresponding to the outer peripheral shape of the molded product 50 a from the upper part toward the lower part. A workpiece 50 is placed on the upper surface of the lower mold 11. The lower mold 11 is a fixed mold. The holding member 12 is made of, for example, a steel material and has a shape corresponding to the outer peripheral shape of the molded product 50a. The holding member 12 is provided so as to be movable in the vertical direction inside the punching hole 11a.

  The side support member 13 is made of, for example, a steel material and is formed in a cylindrical shape. For example, as shown in FIG. 2 and FIG. 3A, three side support members 13 are provided below the lower mold 11 and at both ends and in the center as shown in FIG. 3B. The side support member 13 supports the lower part of the holding member 12 from the side of the holding member 12. The three sets of side support members 13 can be housed inside the lower mold 11 as shown in FIG. That is, the side support member 13 is provided so as to be extendable and contractable in the horizontal direction. In a state where the side support member 13 protrudes to the lower part of the holding member 12 and supports the lower part of the holding member 12, the positions of the upper surface of the lower mold 11 and the upper surface of the holding member 12 are equal as shown in FIG. I'm doing it. When the side support member 13 is housed in the lower mold 11, the holding member 12 moves downward as shown in FIG.

  For example, two lower support members 14 are located below the lower mold 11 as shown in FIGS. 2 and 3A and positioned at both ends of the lower mold 11 as shown in FIG. 3B. Provided. The lower support member 14 supports the lower portion of the holding member 12 from below the holding member 12. The two lower support members 14 can move the holding member 12 downward. That is, the lower support member 14 is provided to be extendable and contractable in the vertical direction. The positions of the upper surface of the lower mold 11 and the upper surface of the holding member 12 coincide with each other with the two lower support members 14 not moving downward. When the two lower support members 14 move downward at an equal movement distance, the holding member 12 moves downward without being inclined as shown in FIG. When one of the two lower support members 14 is not moved and the other is moved downward, the holding member 12 is inclined as shown in FIG. By tilting the holding member 12, the molded product 50 a placed on the holding member 12 is slid and moved to the carry-out unit 40.

  The sealing part 10b of the clamping part 10 is provided with a space part 15b between the workpiece 50 and is sealed along the entire outer periphery of the punching hole 11a. The sealing portion 10 b includes, for example, an upper mold 15, a pressed member 16, a movement reference flange 17, a pressing member 18, and an extension spring 19. The upper mold 15 is made of, for example, a steel material and is formed in a concave portion having an opening in the lower part. The upper mold 15 has a space portion 15b therein. The space 15b is filled with water 60 supplied from the filling unit 20 described later. The upper mold 15 is provided with a close contact portion 15a made of a resin material having elasticity, for example, along the entire circumference of the edge of the opening. The upper die 15 is in close contact with the lower die 11 on which the workpiece 50 is placed via an adhesion portion 15a. The upper mold 15 is a movable type.

  The pressed member 16 of the sealing part 10b is made of, for example, a steel material and has a rectangular shape. The lower part of the pressed member 16 is joined to the upper part of the upper mold 15. The movement reference flange 17 is made of, for example, steel and is formed in a cylindrical shape. The movement reference flange 17 is inserted into the opening provided at the center of the pressed member 16 so as to be movable in the vertical direction. The lower part of the movement reference flange 17 is formed so as to protrude radially outward, and the movement reference flange 17 is prevented from penetrating above the pressed member 16.

  The pressing member 18 of the sealing part 10b is made of, for example, a steel material and has a rectangular shape. The upper part of the movement reference flange 17 is joined to the center of the lower part of the pressing member 18. When the pressed member 16 is pressed by the pressing member 18, the contact portion 15 a of the upper mold 15 is in close contact with the processed member 50 placed on the lower mold 11. The expansion / contraction spring 19 is inserted into a hole opened in the upper part of the pressed member 16 and passes through the upper part of the movement reference flange 17. When the pressing member 18 presses the pressed member 16, the pressing member 18 does not give an impact to the pressed member 16 by using the expansion / contraction force of the expansion / contraction spring 19. When the pressing member 18 is not pressing the pressed member 16, the pressing member 18 and the pressed member 16 are separated from each other by using the expansion / contraction force of the expansion / contraction spring 19. The extension spring 19 is made of, for example, metal and is formed in a spiral shape.

  The filling unit 20 fills the space 15b with a fluid.

  The filling unit 20 fills the space 15b with a fluid based on the control of the control unit 30. The filling unit 20 includes, for example, a liquid feed pump 21, a high pressure chamber 22, and a supply valve 23. As shown in FIG. 7 and the like that will be referred to later, the liquid feed pump 21 is configured so that the workpiece 50 is sandwiched between the punched portion 10a and the sealing portion 10b of the sandwiching portion 10, and the fluid is pumped into the space portion 15b. Fill. As the fluid, for example, water 60 which is an incompressible fluid is used. The liquid feed pump 21 feeds the water 60 while pressurizing the water 60 to a predetermined pressure. The high-pressure chamber 22 is provided between the liquid feed pump 21 and the space 15b, and temporarily stores the pressurized water 60. The supply valve 23 is provided through the pressed member 16 and the upper mold 15 and supplies the water 60 in the high-pressure chamber 22 to the space 15b.

  The control unit 30 controls the operation of the filling unit 20.

  The control unit 30 includes a controller 31, for example. The controller 31 temporarily stores a ROM (Read Only Memory) storing a control program for the molding apparatus 1, a CPU (Central Processing Unit) for controlling the operation of the molding apparatus 1 based on the control program, and various data under control. RAM (Random Access Memory). As shown in FIG. 7 to be referred to later, the controller 31 pressurizes the fluid filled in the space 15b to the first pressure P1 at which the workpiece 50 is not punched by the punching hole 11a, and the workpiece 50 The filling unit 20 is controlled so as to remove the distortion generated in the above. Thereafter, the controller 31 pressurizes the fluid to a second pressure P2 that is higher than the first pressure P1 and the workpiece 50 is punched by the punching hole 11a, as shown in FIG. The filling unit 20 is controlled so as to punch out the molded product 50a from the workpiece 50. The control unit 30 includes a hydraulic pressure control unit 190 shown in FIG.

  The carry-out unit 40 carries out the molded product 50 a punched out from the workpiece 50 to the outside of the molding apparatus 1.

  As shown in FIG. 3B, the carry-out unit 40 includes a carry-out belt 41, a drive roller 42, and a driven roller (not shown). The carry-out belt 41 is an endless belt. The drive roller 42 and a driven roller (not shown) are provided at both ends of the inner peripheral surface of the carry-out belt 41, respectively. When the drive roller 42 is driven, the carry-out belt 41 rotates, and the molded product 50 a placed on the carry-out belt 41 is carried out of the molding apparatus 1.

  Next, a molding method embodied in the molding apparatus 1 will be described with reference to FIGS.

  FIG. 4 is a flowchart showing the forming process using the forming apparatus 1. FIG. 5 is an end view showing the main part of the molding apparatus 1 according to S1 and S2 of FIG. 4 from one side. FIG. 6 is a diagram illustrating pressure values in the space 15b of the molding apparatus 1 illustrated in FIG. FIG. 7 is an end view showing the main part of the molding apparatus 1 according to S3 to S5 of FIG. 4 from one side. FIG. 8 is a diagram illustrating pressure values in the space 15b of the molding apparatus 1 illustrated in FIG. FIG. 9 is an end view showing the main part of the molding apparatus 1 according to S6 of FIG. 4 from one side surface. FIG. 10 is a diagram illustrating pressure values in the space 15b of the molding apparatus 1 illustrated in FIG. FIG. 11 is an end view showing the main part of the molding apparatus 1 according to the end of S6 in FIG. 4 from one side. FIG. 12 is a diagram illustrating a pressure value in the space 15b of the molding apparatus 1 illustrated in FIG.

  FIG. 13 is an end view showing the main part of the molding apparatus 1 according to S7 of FIG. 4 from one side surface. FIG. 14 is a diagram illustrating the pressure value of the space portion 15b of the molding apparatus 1 illustrated in FIG. FIG. 15 is an end view showing the punching unit 10a and the unloading unit 40 according to the molding apparatus 1 shown in FIG. Fig.15 (a) has shown the punching part 10a and the carrying-out part 40 from one side. FIG. 15B shows the punching portion 10a and the carry-out portion 40 from the other side surface adjacent to one side surface. FIG. 16 is an end view showing the main part of the molding apparatus 1 according to S8 of FIG. 4 from one side surface. FIG. 17 is a diagram illustrating a pressure value in the space portion 15b of the molding apparatus 1 illustrated in FIG.

  FIG. 18 is an end view showing the punching unit 10a and the unloading unit 40 of the molding apparatus 1 according to S9 of FIG. FIG. 18A shows the punching part 10a and the carry-out part 40 from one side. FIG. 18B shows the punching portion 10a and the carry-out portion 40 from the other side surface adjacent to one side surface. FIG. 19 is an end view showing the punching part 10a and the unloading part 40 of the molding apparatus 1 following the state shown in FIG. Fig.19 (a) has shown the punching part 10a and the carrying-out part 40 from one side. FIG. 19B shows the punching part 10a and the carry-out part 40 from the other side surface adjacent to one side surface.

  The molding method embodied in the molding apparatus 1 includes, for example, a clamping release process and a conveyance process in addition to the clamping process, the distortion removing process, and the punching process. Hereinafter, each process is demonstrated in order.

  In the clamping process, the workpiece 50 is urged and clamped. The clamping step corresponds to S1 and S2 in FIG. In the clamping step, the molding apparatus 1 is operated from the state shown in FIG. 3 to the state shown in FIG. Specifically, by pressing the pressed member 16 downward using the pressing member 18, the sealing portion 10b is brought closer to the punched portion 10a of the sandwiching portion 10 (S1). Further, the workpiece 50 is sandwiched between the punching portion 10a and the sealing portion 10b in a state where the contact portion 15a of the upper mold 15 and the workpiece 50 are in close contact (S2). In the state shown in FIG. 5, the water 60 is not filled in the space 15 b of the molding apparatus 1, so the water pressure Pa of the water 60 in the space 15 b shown in FIG.

  In the distortion removing step, distortion generated in the workpiece 50 is removed. The distortion removing step corresponds to S3 to S5 in FIG. In the distortion removing step, the molding apparatus 1 is operated from the state shown in FIG. 5 to the state shown in FIG. Specifically, the space 15b of the sealing portion 10b is filled with water 60 (S3), the water 60 filled in the space 15b is pressurized to the first pressure P1 (S4), and is generated in the workpiece 50. Distortion is removed (S5). The water pressure Pb of the water 60 filled in the space 15b of the molding apparatus 1 is raised within the range of the first pressure P1 shown in FIG. The first pressure P1 is a pressure at which the molded product 50a is not punched out from the workpiece 50 even when the workpiece 50 is pressed with the water 60 filled in the space 15b. The water 60 pressurized to the first pressure P1 is used to remove distortion generated in the workpiece 50.

  In the punching process, the molded product 50 a is punched from the workpiece 50. The punching process corresponds to S6 and S7 in FIG. In the punching step, first, the molding apparatus 1 is operated from the state shown in FIG. 7 to the state shown in FIG. 11 through FIG. Specifically, the water 60 filled in the space 15b is pressurized to the second pressure P2 (S6). The second pressure P2 is a pressure at which the molded product 50a is punched out from the workpiece 50 when the workpiece 50 is pressed with the water 60 filled in the space 15b. As shown in FIG. 10, the water pressure Pc of the water 60 filled in the space 15b of the molding apparatus 1 is maintained at a constant value over a predetermined time. Next, the molding apparatus 1 is operated from the state shown in FIG. 9 to the state shown in FIG. Specifically, the pressure of the water filled in the space 15b is increased from the pressure Pc maintained at a constant value shown in FIG. 10 to the pressure Pd shown in FIG. 12 (S6). The pressure Pd is an upper limit value of the second pressure P2.

  Here, in the punching step, the molding apparatus 1 is operated from the state shown in FIG. 11 to the state shown in FIGS. 13 and 15. That is, immediately after the pressure of the water filled in the space 15b is changed to the pressure Pd shown in FIG. 12, the molded product 50a is punched from the workpiece 50 (S7). Specifically, for example, immediately after the pressure of the water filled in the space 15b is changed to the pressure Pd shown in FIG. 12, the three sets of side support members 13 are accommodated in the lower mold 11, and two The lower support member 14 is moved downward by an equal movement distance, and the holding member 12 is moved downward. The molded product 50 a punched out from the workpiece 50 moves downward while being placed on the holding member 12. At this time, the water 60 filled in the space portion 15b of the upper die 15 starts to be discharged through the punching hole 11a in a state where the contact portion 15a of the upper die 15 and the workpiece 50 are in close contact. Immediately after the molded product 50a is punched out, the water pressure Pe of the water 60 shown in FIG. 14 is lower than the water pressure Pd of the water 60 shown in FIG.

  In the clamping release step, the clamping of the workpiece 50 is released. The workpiece 50 is the one after the molded product 50a is punched out. The clamping release process corresponds to S8 in FIG. In the clamping release process, the molding apparatus 1 is operated from the state shown in FIG. 13 to the state shown in FIG. Specifically, by raising the pressing member 18 that pressed the pressed member 16 downward, the close contact between the contact portion 15a of the upper mold 15 and the workpiece 50 is released, and the punching portion of the sandwiching portion 10 is released. The sealing part 10b is separated from 10a (S8). Since the water 60 has been discharged from the space portion 15b of the molding apparatus 1, the water pressure Pf of the water 60 shown in FIG.

  In the conveying step, the molded product 50a punched from the workpiece 50 is conveyed. The transport process corresponds to S9 in FIG. In the conveying step, the molding apparatus 1 is operated from the state shown in FIG. 16 to the state shown in FIG. 19 through the state shown in FIG. Specifically, as shown in FIG. 18, one of the two lower support members 14 (the right side in FIG. 18) is not moved, and the other (the left side in FIG. 18) is moved downward to hold it. The member 12 is inclined. By tilting the holding member 12, as shown in FIG. 19, the molded product 50 a placed on the holding member 12 is slid and moved to the carry-out portion 40. The carry-out part 40 carries out the molded product 50 a to the outside of the molding apparatus 1 in a state where it is placed on the carry-out belt 41.

  Here, the pressure control of the water 60 and the position control of the holding member 12 in the molding method will be described with reference to FIGS.

  FIG. 20 is a time chart showing the relationship (example 1) between the pressure of the water 60 and the position of the holding member 12 during the molding process using the molding apparatus 1. FIG. 21 is a time chart showing the relationship (example 2) between the pressure of the water 60 and the position of the holding member 12 during the molding process using the molding apparatus 1. FIG. 22 is a time chart showing the pressure of water 60 (example 3) during molding using the molding apparatus 1. FIG. 23 is a time chart showing the pressure of the water 60 (Example 4) during the molding process using the molding apparatus 1.

  FIG. 20 is a time chart relating to the molding process of the molding apparatus 1 described above with reference to FIGS. At times T0 to T1, the water 60 filled in the space 15b shown in FIG. 7 is gradually pressurized within the range of the first pressure P1, and the distortion generated in the workpiece 50 is removed. Immediately after time T1 is exceeded, at time T2, water 60 filled in the space 15b shown in FIG. 9 is pressurized at a constant pressure within the range of the second pressure P2. Immediately after exceeding time T2, at time T3, the water 60 filled in the space 15b shown in FIG. 13 is increased to the upper limit value of the second pressure P2. The molded product 50a is punched from the workpiece 50 at time T3. In accordance with the punching timing, the holding member 12 is lowered horizontally as shown in FIG. 15, and is held for a predetermined time in that state. The water 60 is discharged from the space 15b. Thereafter, the holding member 12 is lowered in an inclined state as shown in FIG. 18B by time T4, and held in that state until time T5. The molded product 50a is unloaded by the unloading unit 40 by time T5. From immediately after time T5 to time T6, the holding member 12 is raised to the original position shown in FIG.

  FIG. 21 shows a configuration in which the first pressure P1 and the second pressure P2 are varied in the molding process of the molding apparatus 1 described above with reference to FIGS. According to the molding method configured as described above, when a local strain remains in the workpiece 50 pressed using the water 60, the first pressure applied to the water 60 is changed. , Its local distortion can be removed. On the other hand, by changing the second pressure applied to the water 60, the molded product 50a can be smoothly punched from the workpiece 50.

  FIG. 22 shows, in the molding process shown in FIG. 21, the cycle L1 of the first pressure P1 applied in a pulsed manner and the cycle L2 of the second pressure P2 applied in a pulsed manner in stages. The first pressure P1 and the second pressure P2 are varied so as to be shorter. On the other hand, FIG. 23 shows the pressure value S1 of the first pressure P1 applied in a pulsed manner and the pressure value S2 of the second pressure P2 applied in a pulsed manner in the molding process shown in FIG. The first pressure P1 and the second pressure P2 are varied so as to increase stepwise. By any of the above-described forming methods, it is possible to apply a high load stepwise to the workpiece 50 that is pressed using the water 60. Therefore, the local distortion remaining on the workpiece 50 can be removed smoothly, and the molded product 50a can be punched smoothly from the workpiece 50.

  Next, a molded product 50a formed by punching from the workpiece 50 by the molding apparatus 1 will be described with reference to FIG.

  FIG. 24 is a perspective view showing a molded product 50 a formed by punching from the workpiece 50 by the molding apparatus 1.

  The molded product 50a corresponds to, for example, a metal separator for a fuel cell. The molded product 50a has a cathode gas supply port 51, a cooling fluid supply port 52, and an anode gas supply port 53 opened at one end in the longitudinal direction thereof. On the other hand, the molded product 50a has a cathode gas outlet 54, a cooling fluid outlet 55, and an anode gas outlet 56 opened at the other end in the longitudinal direction. These openings are processed by the processing machine 100 before the outer trim process is performed by the molding apparatus 1.

  The molded product 50a is provided with an uneven portion 58 in the center in the longitudinal direction. The uneven portion 58 forms a U-shaped groove from one end to the other end in the longitudinal direction of the molded product 50a. The concavo-convex portion 58 corresponds to a flow path of cooling water that flows from one end to the other end in the longitudinal direction of the molded product 50a. The molded product 50 a is provided with convex portions 57 at both ends along the longitudinal direction of the concave and convex portions 58. Similar to the concavo-convex portion 58, the convex portion 57 corresponds to a flow path of cooling water that flows from one end to the other end in the longitudinal direction of the molded product 50a. The convex portion 57 and the concavo-convex portion 58 are processed by the processing machine 100 before the outer shape trimming process is performed by the molding device 1.

  Here, the distortion accumulated in the workpiece 50 by the processing by the processing machine 100 is absorbed using the molding apparatus 1. Specifically, when the water 60 filled in the space portion 15b is pressurized to the first pressure P1 by the molding device 1, the distortion accumulated in the workpiece 50 has already been molded in the region punched out by the punching hole 11a. Are absorbed by the convex portion 57 or the concave-convex portion 58. As a result, it is possible to obtain a molded product 50a whose outer dimensions are molded with high accuracy. For example, when the convex portion 57 or the concave-convex portion 58 is intended to secure a cooling water flow path, there is no problem in performance even if the shape thereof is somewhat distorted.

  The molding method according to the present embodiment, the molding device 1 that embodies the molding method, and the molded product 50a molded by the molding device 1 have the following operational effects.

  In the molding method, the molded product 50a is punched from the plate-like workpiece 50. The molding method includes a clamping step, a strain removing step, and a punching step. In the clamping step, a space 15b is provided between the punched portion 10a that opens the punched hole 11a corresponding to the outer peripheral shape of the molded product 50a and the workpiece 50, along the entire outer periphery of the punched hole 11a. The workpiece 50 is urged and sandwiched by the sealing portion 10b to be sealed. In the strain removing step, the fluid filled in the space 15b is pressurized to the first pressure P1 at which the workpiece 50 is not punched by the punching hole 11a, and the strain generated in the workpiece 50 is removed. In the punching process, the fluid is pressurized to a second pressure P2 that is higher than the first pressure P1 and the workpiece 50 is punched by the punching hole 11a, and the molded product 50a is punched from the workpiece 50.

  The molding apparatus 1 punches a molded product 50a from a plate-shaped workpiece 50. The molding apparatus 1 includes a sandwiching unit 10, a filling unit 20, and a control unit 30. The sandwiching portion 10 includes a space portion 15b between the punched portion 10a having a punched hole 11a corresponding to the outer peripheral shape of the molded product 50a and the workpiece 50, and extends along the entire outer periphery of the punched hole 11a. The workpiece 50 is urged and clamped by the sealing portion 10b to be sealed. The filling unit 20 fills the space 15b with a fluid. The control unit 30 controls the operation of the filling unit 20. Here, the control unit 30 pressurizes the fluid filled in the space 15b to the first pressure P1 at which the workpiece 50 is not punched by the punching hole 11a, and removes the distortion generated in the workpiece 50. The filling portion 20 is controlled so that the fluid is pressurized to a second pressure P2 that is higher than the first pressure P1 and the workpiece 50 is punched by the punching hole 11a, and the molded product 50a is punched from the workpiece 50. To do.

  The molded product 50a is punched from the plate-like workpiece 50 and molded. The molded product 50a includes a space 15b between the punched portion 10a having a punched hole 11a corresponding to the outer peripheral shape of the molded product 50a and the workpiece 50, and extends along the entire outer periphery of the punched hole 11a. The workpiece 50 is urged and sandwiched by the sealing portion 10b to be sealed, and the fluid filled in the space 15b is pressurized to the first pressure P1 at which the workpiece 50 is not punched by the punching hole 11a. Then, the distortion generated in the workpiece 50 is removed, the fluid is pressurized to a second pressure P2 that is higher than the first pressure P1 and the workpiece 50 is punched by the punching hole 11a, and punched from the workpiece 50 Are molded.

  According to the molding method configured as described above, the molding device 1 that embodies the molding method, and the molded product 50a molded by the molding device 1, it does not depend on the adjustment accuracy of a processing member such as a mold. The molded product 50a can be punched out of the workpiece 50 with high accuracy.

  Further, according to the molding method configured as described above, the molding device 1 embodying the molding method, and the molded product 50 a molded by the molding device 1, the entire surface of the molded product 50 a punched out from the workpiece 50 is formed. The water 60 can be pressed evenly. Therefore, when the molded product 50a is punched from the workpiece 50, the molded product 50a can be prevented from being partially bent or distorted.

  Further, for example, in the molding method, an incompressible fluid may be used as the fluid.

  According to the molding method configured as described above, the incompressible fluid can be pressurized quickly as compared with a case where a compressive fluid such as air is used. Therefore, according to this forming method, it is possible to reduce the time required for punching after the workpiece 50 is pressed to remove the distortion.

  Further, for example, in the molding method, the first pressure P1 or the second pressure P2 may be varied.

  According to the molding method configured as described above, when a local strain remains in the workpiece 50 pressed with the fluid, the local pressure is changed by changing the first pressure applied to the fluid. Distortion can be removed. On the other hand, by changing the second pressure applied to the fluid, the workpiece 50 can be impacted and the molded product 50a can be punched from the workpiece 50.

  Further, for example, in the molding method, the first pressure P1 or the second pressure P2 may be changed so that the cycle thereof is shortened stepwise or the pressure value is increased stepwise.

  According to the molding method configured as described above, a strain that remains locally on the workpiece 50 is applied by applying a high load to the workpiece 50 that is pressed using the fluid in stages. It can be removed smoothly. On the other hand, the molded product 50a can be smoothly punched from the workpiece 50.

  Further, for example, in the molding method, after the second pressure P2 is applied to the fluid for a predetermined time, the molded part is punched from the workpiece 50 immediately after the second pressure P2 is changed so as to increase the pressure value. It is good also as a structure.

  According to the molding method configured in this way, the workpiece 50 can be urged at a pressure higher than the second pressure P <b> 2 to punch the molded product 50 a from the workpiece 50 at a high speed. When the molded product 50a is punched from the workpiece 50 at a high speed, the shape of the outer peripheral portion of the molded product 50a is easily secured as compared with the case where the molded product 50a is punched at a low speed. Furthermore, if the workpiece 50 is punched by increasing the pressure value of the second pressure P2, the timing for punching the molded product 50a from the workpiece 50 can be adjusted.

  Further, for example, in the forming method, in the clamping process, the workpiece 50 is regulated so as not to move when it is pressurized to the first pressure P1 by the holding member 12 provided movably inside the punching hole 11a. The workpiece 50 may be held in a state. In this case, when being pressurized to the second pressure P2, the workpiece 50 is held in a state where the restriction is released so that the workpiece 50 can move.

  According to the molding method configured as described above, it is possible to prevent the entire region to be the molded product 50a from being bent or dented before the molded product 50a is punched from the workpiece 50, and the molded product 50a is punched into the punching hole. It can be punched with high accuracy along 11a.

  Furthermore, for example, in the molding method, before the clamping step, it may be configured to further include a processing step of molding an opening or unevenness in the region that becomes the molded product 50a.

  According to the molding method configured as described above, various distortions accumulated in the workpiece 50 in the machining process for molding the opening or the unevenness are applied to the molded product 50a from the workpiece 50 in the outer trim process by the molding apparatus 1. It can be removed just before punching. Furthermore, according to the molding method configured as described above, the molds interfere with each other or depend on the various distortions accumulated in the workpiece 50 during the process of molding the opening or the unevenness, No cutting failure occurs in the part.

  Further, for example, in a molding method, a metal plate may be used as the workpiece 50 and a molded product 50a made of a metal separator may be molded.

  According to the molding method configured as described above, the molded product 50a is punched from the workpiece 50 with high accuracy, and there is no deviation in the dimensional accuracy of the molded product 50a. Will not accumulate in one direction. Therefore, for example, in a fuel cell, even when several hundred or more layers of membrane electrode assemblies and metal separators are alternately stacked, a problem due to stacking deviation does not occur.

  Further, for example, in a molded product, the fluid filled in the space 15b is pressurized to the first pressure P1, and the distortion generated in the workpiece 50 is caused by the convex portion 57 formed in the region punched out by the punching hole 11a or It is good also as a structure absorbed by the uneven | corrugated | grooved part 58. FIG.

  If comprised in this way, when the water 60 with which the space part 15b was filled with the shaping | molding apparatus 1 is pressurized to the 1st pressure P1, the distortion accumulate | stored in the to-be-processed member 50 will be in the area | region punched by the punching hole 11a. The molded convex portion 57 or the concave and convex portion 58 can be absorbed. As a result, it is possible to obtain a molded product 50a whose outer dimensions are molded with high accuracy. For example, when the convex portion 57 or the concave-convex portion 58 is intended to secure a cooling water flow path, there is no problem in performance even if the shape thereof is somewhat distorted.

  In addition, the present invention can be variously modified based on the configurations described in the claims, and these are also within the scope of the present invention.

  For example, the fluid filling the space 15b is not limited to a liquid, and for example, a gas may be used. The fluid is not limited to water 60, and for example, an aqueous solution containing a refrigerant may be used. The molded product 50a that is punched and molded from the workpiece 50 is not limited to a separator, and may be various parts used for an electric device, for example. The workpiece 50 is not limited to a metal plate, and for example, a resin material may be used. In the molding apparatus 1, the lower mold 11 is a fixed mold and the upper mold 15 is a movable mold. However, the lower mold 11 may be a movable mold and the upper mold 15 may be a fixed mold.

1 molding equipment,
10 clamping part,
10a punching part,
10b sealing part,
11 Lower mold,
11a punching hole,
12 holding member,
13 side support members,
14 Lower support member,
15 Upper mold,
15a adhesion part,
15b space part,
16 pressed member,
17 Movement reference flange,
18 pressing member,
19 telescopic spring,
20 filling section,
21 Liquid feed pump,
22 high pressure chamber,
23 supply valve,
30 control unit,
31 controller,
40 Unloading part,
41 Unloading belt,
42 driving roller,
50 workpieces,
50a molded product,
51 Cathode gas supply port,
52 Cooling fluid supply port,
53 Anode gas supply port,
54 Cathode gas outlet,
55 Cooling fluid outlet,
56 Anode gas outlet,
57 convex part,
58 Concavity and convexity,
60 water,
100 processing machine,
110 Upper mold,
120 Lower mold,
130 coils,
140,150 feeder,
160 feeder control unit,
170 press controller,
180 high pressure chamber,
190 hydraulic control unit,
P1 first pressure,
P2 second pressure,
Pa, Pb, Pc, Pd, Pe, Pf Water pressure,
T0, T1, T2, T3, T4, T5, T6 time,
L1, L2 period,
S1, S2 Pressure values.

Claims (9)

A molding method for punching a molded product from a plate-shaped workpiece,
A punched portion having a punched hole corresponding to the outer peripheral shape of the molded product, and a sealing portion that includes a space portion between the workpiece and seals along the entire outer periphery of the punched hole; A clamping step of biasing and clamping the workpiece,
A strain removing step of pressurizing the fluid filled in the space to a first pressure at which the workpiece is not punched by the punching hole, and removing strain generated in the workpiece;
A stamping step in which the fluid is pressurized to a second pressure higher than the first pressure and the workpiece is punched by the punching hole, and the molded product is punched from the workpiece. Method.   The molding method according to claim 1, wherein an incompressible fluid is used as the fluid.   The molding method according to claim 1, wherein the first pressure or the second pressure is varied.   The molding method according to claim 3, wherein the first pressure or the second pressure is varied such that the cycle thereof is shortened stepwise or the pressure value is increased stepwise. After applying the second pressure to the fluid for a predetermined time;
Molding method according to claim 3 or 4 punching the workpiece or RaNaru form part immediately after varied to increase the pressure value of the second pressure. In the clamping step, by a holding member provided movably inside the punching hole,
Holding the workpiece in a state where the workpiece is restricted from moving when being pressurized to the first pressure;
6. The workpiece according to claim 1, wherein the workpiece is held in a state where the restriction is released so that the workpiece can move when the second pressure is applied. Molding method.   The shaping | molding method of any one of Claims 1-6 which further has a process process which shape | molds an opening or an unevenness | corrugation with respect to the inside of the area | region used as the said molded article before the said clamping process. The shaping | molding method of any one of Claims 1-7 which shape | mold the said molded article which consists of a metal separator using a metal plate for the said to- be-processed member. A molding apparatus for punching a molded product from a plate-shaped workpiece,
A punched portion having a punched hole corresponding to the outer peripheral shape of the molded product, and a sealing portion that includes a space portion between the workpiece and seals along the entire outer periphery of the punched hole; A clamping part that biases and clamps the workpiece, and
A filling portion for filling the space with a fluid;
A control unit for controlling the operation of the filling unit,
The controller is
After pressurizing the fluid filled in the space to a first pressure at which the workpiece is not punched by the punching hole, and removing distortion generated in the workpiece,
The fluid is pressurized to a second pressure that is higher than the first pressure and the workpiece is punched by the punching hole, and the filling unit is controlled to punch the molded product from the workpiece. Molding equipment.