JP7322738B2 - Progressive press machine - Google Patents

Description

The present invention relates to a progressive press working apparatus.

When manufacturing a plate-shaped product, it is conceivable to perform progressive press working as shown in Patent Document 1 in order to improve manufacturing efficiency. As a progressive press working apparatus for realizing such progressive press working, for example, the following may be used.

In this progressive press working apparatus, a belt-shaped material is arranged so as to extend horizontally between an upper die and a lower die. Through the operation of the progressive press working device, the plate-shaped product is formed by the strip-shaped material so as to be aligned along the longitudinal direction of the strip-shaped material, and is formed into a strip-shaped product at the ends of the strip-shaped material in the longitudinal direction. separated from the material. Therefore, in the belt-shaped material, the product forming regions for forming the plate-shaped product are aligned in the longitudinal direction of the belt-shaped material.

A plurality of press-worked portions are sequentially provided along the longitudinal direction of the band-shaped material in the portion where the upper die and the lower die of the progressive press work device face each other. In this device, the belt-like material is fed in the longitudinal direction at a pitch corresponding to the width of the product forming area of the belt-like material each time the mold opening and closing of the upper and lower dies are repeated. Then, the plate-like product is formed by pressing the belt-like material on the product forming area in the press working section by clamping the mold of the same device.

JP-A-8-19823

In the progressive press working device, the strip material is fed in the longitudinal direction at a pitch corresponding to the width of the product forming area each time the mold is opened, and each product forming area is press-worked by the press working part each time the mold is closed. Therefore, warping (bending) due to press working is more likely to occur in the front portion of the belt-shaped material in the feeding direction. Then, if the product forming area of the belt-shaped material is pressed by the press working part in such a warped state, there is a problem that it becomes difficult to press an appropriate position in the product forming area.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a progressive press working apparatus that can suppress press working in a state in which a belt-like material is warped.

Means for solving the above problems and their effects will be described below.
In the progressive press working apparatus that solves the above problems, the belt-shaped material is arranged so as to extend horizontally between the upper die and the lower die, while the belt-shaped material is placed in the portion where the upper die and the lower die face each other. A plurality of pressed parts are sequentially provided along the longitudinal direction of the . In this device, the belt-shaped material is fed in the longitudinal direction at a pitch corresponding to the width of the product forming area of the belt-shaped material each time the mold opening and closing of the upper mold and the lower mold are repeated. . As a result, the plate-shaped product is formed through press working on the product forming region of the belt-shaped material in the plurality of press working portions by clamping the molds. A lower roller for placing a belt-like material on the lower die side of the press working portion of the apparatus is provided so as to be rotatable and retractable with respect to the lower die. The lower roller is biased by a biasing member so as to protrude from the lower die toward the upper die, and can be retracted into the lower die against the biasing force. The lower die is provided with a retraction block that moves up and down together with the retracting movement of the lower roller with respect to the lower die. On the other hand, a pressing member protruding from the upper die toward the lower die is provided so as to protrude and retract from the upper die in the portion on the upper die side of the press working portion. The restraining member is connected to the upper mold via an elastic member, and can be retracted into the upper mold against the elastic force of the elastic member. At a position of the upper die facing the retraction block, there is provided a pressing block that moves up and down together with the retracting movement of the holding member with respect to the upper die. In this device, the elastic force of the elastic member is smaller than the biasing force of the biasing member. It is designed to approach to the distance corresponding to the distance.

According to the above configuration, the belt-shaped material placed on the lower roller of the lower mold is fed in the longitudinal direction at a pitch corresponding to the width of the product forming area each time the mold is opened. At this time, since the lower roller rolls with the movement of the belt-shaped material, it is possible to prevent the belt-shaped material from being rubbed during the movement. In addition, each product forming region aligned in the longitudinal direction of the band-shaped material is press-worked by the press-working unit each time the molds are closed. More specifically, when the molds are clamped, the upper mold side portion and the lower mold side portion of the press working portion approach each other, and the press working portion presses the product forming region of the strip-shaped material. Since such press working is performed, warping (bending) due to the press working is more likely to occur in the front portion of the belt-shaped material in the feeding direction. However, even if the strip-shaped material is warped, when the upper die and the lower die approach each other during mold clamping, the suppressing member of the upper die contacts the warped strip-shaped material, so that the warp can be suppressed. become.

After that, when the clamping member and the lower roller come close to each other to a distance corresponding to the thickness of the belt-shaped material, the pressing block of the upper die hits the retraction block of the lower die, and as the upper die approaches the lower die, it presses. The block and the holding member are displaced against the elastic force of the elastic member in the direction of retracting the holding member into the upper die. The displacement at this time is performed while maintaining the distance between the pressing member and the lower roller at a value corresponding to the thickness of the belt-shaped material. Further, when the holding member is immersed in the upper die, the belt-shaped material hits the upper die, and the elastic member is contracted to the maximum, the pressing block moves the retraction block of the lower die to the biasing member as the upper die approaches the lower die. presses against the biasing force of As a result, the retraction block and the lower roller are displaced in the direction in which the lower roller is immersed in the lower mold, and the belt-shaped material placed on the lower roller and in contact with the upper mold hits the lower mold, and the product forming area of the belt-shaped material is hit. , press working is performed by the press working portion between the upper die and the lower die.

In this way, when the mold is clamped, the holding member and the lower roller approach to a distance corresponding to the thickness of the belt-shaped material, and the holding member and the lower roller are immersed in the upper mold and the lower mold while maintaining that distance. At the same time, the press working section presses the product forming area of the belt-shaped material. Therefore, the warp of the belt-shaped material is eliminated before the press working, and it is possible to suppress press working of the product forming region of the belt-shaped material in the state where such warping occurs.

FIG. 4 is a plan view schematically showing how a separator is manufactured from a belt-shaped material by a progressive pressing apparatus; The side view which shows a progressive press processing apparatus roughly. FIG. 4 is an enlarged cross-sectional view showing a burring forming portion of the device; The side view which shows the 2nd pin in the same apparatus. Sectional drawing which shows the structure around the support member in a lower mold|type and an upper mold|type. Schematic drawing which shows the upper roller and lower roller in an upper mold|type and a lower mold|type, and those peripheral structures. Schematic drawing which shows the upper roller and lower roller in an upper mold|type and a lower mold|type, and those peripheral structures. Schematic drawing which shows the upper roller and lower roller in an upper mold|type and a lower mold|type, and those peripheral structures. Schematic drawing which shows the upper roller and lower roller in an upper mold|type and a lower mold|type, and those peripheral structures. Schematic drawing which shows the upper roller and lower roller in an upper mold|type and a lower mold|type, and those peripheral structures.

An embodiment of the progressive press working apparatus will be described below with reference to FIGS. 1 to 10. FIG.
FIGS. 1 and 2 show, respectively, a mode of manufacturing a plate-like product (for example, a separator 3 for a fuel cell) from a metal belt-shaped material 2 by a progressive press working apparatus 1, and a side view of the progressive press working apparatus 1. 1 schematically shows the state viewed from

As can be seen from FIG. 1, the belt-shaped material 2 has product forming areas 4 for forming the separators 3 arranged without gaps along its longitudinal direction (horizontal direction in FIGS. 1 and 2). The separator 3 formed by the product forming area 4 of the strip material 2 passes fluids supplied to and discharged from the fuel cell, namely fuel gas (hydrogen), oxidizing gas (air), and coolant (cooling water). It has holes 5 to 7 and a flow path 8 for allowing the flow. Incidentally, the separator 3 in this example is in the form of a rectangular plate whose long side is the width direction of the strip-shaped material 2 (vertical direction in FIG. 1). Furthermore, the holes 5 to 7 are formed on both sides of the separator 3 in the long side direction, and the flow path 8 is formed in the central portion of the separator 3 in the long side direction.

As shown in FIG. 2, the progressive press working apparatus 1 includes an upper mold 9 and a lower mold 10 that repeat mold opening and mold closing. While the upper mold 9 is separated from the mold 10, the upper mold 9 is lowered to approach the lower mold 10 when the mold is clamped. Between the upper die 9 and the lower die 10 of the progressive press working device 1, the belt-shaped material 2 is arranged so as to extend in the horizontal direction. The width of the product forming area 4 (the length of the belt-like material 2 in the product forming area 4 in the longitudinal direction) ) to the right side in the longitudinal direction of the belt-shaped material 2 in FIG.

Pilot hole forming portion 11 , forming portion 12 , and punching portion 13 are arranged from the rear side to the front side in the feeding direction of the belt-shaped material 2 in the portion facing the upper die 9 and the lower die 10 in the progressive press working device 1 . , and the dividing portion 14 are provided in this order. The pilot hole forming portion 11, the forming portion 12, the punching portion 13, and the dividing portion 14 perform press working on the product forming region 4 of the belt-shaped material 2 each time the mold is closed, and through the press working, a plurality of separators 3 are formed. Plays a role as a press processing department.

Next, details of the pilot hole forming portion 11, the forming portion 12, the punching portion 13, and the dividing portion 14 in the progressive press working device 1 will be individually described.
[Pilot hole forming part 11]
The pilot hole forming portion 11 forms a pilot hole 15 (FIG. 1) for positioning in the product forming region 4 of the band-shaped material 2 when the mold is clamped. Specifically, as shown in FIG. 2 , a pilot hole punch 16 for punching a pilot hole 15 is provided in a portion of the pilot hole forming portion 11 corresponding to the upper die 9 . At the time of mold clamping, pilot holes 15 ( FIG. 1 ) are formed in the product forming region 4 by punching out predetermined portions in the product forming region 4 with the pilot hole punch 16 of the pilot hole forming portion 11 . be. Incidentally, the formation position of the pilot hole 15 in the product forming area 4 is the trailing end (the left end in FIG. 2) of the belt-shaped material 2 in the feeding direction, among the portions where the holes 5 to 7 of the separator 3 in the product forming area 4 are to be formed. is a part to be formed.

[Molding part 12]
The forming part 12 forms a flow path 8 (FIG. 1) for the separator 3 by applying shape processing to a part of the product forming region 4 of the belt-shaped material 2 during mold clamping, and the pilot hole 15 in the product forming region 4. A positioning portion 17 (FIG. 1) for positioning the belt-shaped material 2 is formed in a portion corresponding to (FIG. 1). Specifically, as shown in FIG. 2, the molding portion 12 includes a flow path molding surface 18 for forming the flow path 8, and a burring forming portion for burring the pilot hole 15 (FIG. 1). 19 are provided.

As shown in FIG. 3, the burring forming portions 19 are positioned corresponding to the pilot holes 15 of the belt-shaped material 2, and are formed by a burring pin 20 positioned on the upper die 9 side and a die 21 positioned on the lower die 10 side. It has At the time of mold clamping, the burring pin 20 and the die 21 relatively move toward each other so that the pilot hole 15 in the product forming area 4 is widened by the burring pin 20 . As a result, the pilot hole 15 is burred, and a positioning portion 17 for positioning the belt-shaped material 2 around the pilot hole 15 is formed through the burring.

Therefore, as shown in FIG. 1, the pilot hole 15 is formed in the portion where the positioning portion 17 is to be formed in the product forming area 4 by the pilot hole forming portion 11 described above. Further, the positioning portion 17 is formed in a portion of the product forming area 4 where the holes 5 to 7 of the separator 3 are to be formed, in a portion where the hole 5 located at the rear end of the belt-shaped material 2 in the feeding direction is to be formed. It also means that

On the other hand, at the time of clamping, the above-described burring process is performed, and at the same time, the formation (shape processing) of the flow path 8 by the flow path molding surface 18 (FIG. 2) is also performed. The positioning of the belt-shaped material 2 during the formation of the flow paths 8 is performed by inserting the burring pins 20 into the pilot holes 15 during the burring process. Therefore, the flow path 8 is formed in a state in which the belt-shaped material 2 is positioned, and the flow path 8 is formed at an appropriate position with respect to the product forming area 4 (the belt-shaped material 2). will be able to In other words, the shape processing for forming the flow path 8 is accurately performed with the positioning portion 17 as a reference.

[Punching part 13]
As shown in FIG. 2, a first pin 22 is provided at a portion of the punching portion 13 corresponding to the upper die 9 for positioning the belt-shaped material 2 when clamping the die. The first pins 22 are inserted into the positioning portions 17 (pilot holes 15) shown in FIG.

Further, as shown in FIG. 2, fluid hole punches 23 to 25 are provided at portions of the punching portion 13 corresponding to the upper die 9 . The fluid hole punches 23 and 24 form the holes 6 and 7 in the parts where the holes 5 to 7 (FIG. 1) of the separator 3 are to be formed in the product forming area 4, where the positioning part 17 is not formed. It is for punching out the planned portion. In other words, the fluid hole punches 23 and 24 are for punching out the portions where the positioning portion 17 is not formed among the portions to be punched in the product forming area 4 .

Further, the fluid hole punch 25 has a portion where the positioning portion 17 is formed in the product forming region 4 adjacent to the product forming region 4 on the front side in the feeding direction of the strip-shaped material 2, that is, a portion where the holes 5 are to be formed. It is for punching out. In other words, the fluid hole punch 25 is for punching the portion where the positioning portion 17 is formed among the portions to be punched in the adjacent product forming regions 4 . Incidentally, it can also be said that the positioning portion 17 is formed by the forming portion 12 in the portion to be punched by the fluid hole punch 25 in the product forming area 4 .

As shown in FIG. 2, a second pin 26 is also provided at a portion of the punching part 13 corresponding to the upper die 9 . The second pins 26 are inserted into the formed holes 6 (FIG. 1) in the adjacent product forming regions 4 when the molds are clamped, and come into contact with the inner edges of the holes 6 on the front side in the feeding direction of the strip-shaped material 2, thereby It is engaged with the product forming area 4 to restrict the displacement of the belt-shaped material 2 toward the first pin 22 . As shown in FIG. 4, the outer peripheral surface of the tip of the second pin 26 (the lower end in FIG. 4) and the front side (the right side in FIG. 4) of the hole 6 in the feed direction of the belt-shaped material 2 is the second pin 26. The pin 26 is inclined so that the width of the pin 26 becomes narrower toward the tip.

Therefore, the second pin 26 can be easily inserted into the hole 6 when clamping the mold. Further, when the second pin 26 is inserted into the hole 6, the outer peripheral surface of the pin 26 moves the front inner edge of the hole 6 in the feeding direction of the belt-shaped material 2 in the direction away from the first pin 22 (FIG. 2) (see FIG. 2). 2 to the right). As a result, positioning of the belt-shaped material 2 is more reliably performed by the first pins 22 and the second pins 26 .

At the time of mold clamping, as shown in FIG. 1, the first pin 22 is inserted into the positioning portion 17 (pilot hole 15) of the product forming area 4 of the band-shaped material 2, and the second pin 26 is inserted into the product forming area. The belt-shaped material 2 is positioned by inserting it into the hole 6 of the product forming area 4 adjacent to the front side of the belt-shaped material 2 in the feed direction with respect to 4 . Further, in the state where the belt-shaped material 2 is positioned, the product forming area 4 including the positioning portion 17 (pilot hole 15) into which the first pin 22 is inserted is pressed by the fluid hole punches 23 and 24 (FIG. 2). Holes 6, 7 are formed.

At this time, the fluid hole punch is applied to the product forming region 4 adjacent to the product forming region 4 on the front side in the feed direction of the strip-shaped material 2, that is, the product forming region 4 including the hole 6 into which the second pin 26 is inserted. Hole 5 is formed by 25 . A positioning portion 17 exists in the portion where the hole 5 is to be formed (punched portion) in the product forming region 4 , and the positioning portion 17 is formed by the punch 25 for the fluid hole to form the hole in the product forming region 4 . 5 is stamped with the part to be formed.

[Dividing part 14]
As shown in FIG. 2, the dividing section 14 divides the product forming region 4 from the band-shaped material 2 at the time of mold clamping, and the separated product forming region 4 is used as the separator 3 (FIG. 1). . A dividing punch 27 is provided at the portion of the dividing portion 14 on the upper mold 9 side, and a stripper 28 is provided on the portion of the dividing portion 14 on the lower mold 10 side. At the time of mold clamping, the shearing force between the dividing punch 27 and the stripper 28 divides the product forming area 4 located on the frontmost side in the feed direction of the belt-shaped material 2 . The product forming area 4 thus separated from the belt-shaped material 2 becomes the separator 3, and the manufactured separator 3 is conveyed to a predetermined place by a conveyor or the like.

Next, a manufacturing mode of the separator 3 by the progressive press working apparatus 1 will be described.
As shown in FIG. 1, in the progressive press working apparatus 1, a predetermined product forming area 4 in the belt-shaped material 2 is positioned corresponding to the pilot hole forming portion 11, and mold clamping is performed in this state. A pilot hole 15 is thereby formed in the product forming area 4 . 1 at a pitch corresponding to the width of the product forming area 4 (length in the left-right direction in FIG. 1) while the mold is being opened. are positioned corresponding to the molded portion 12 .

When the mold is clamped while the product forming region 4 is positioned corresponding to the molding portion 12, a positioning portion 17 is formed at a portion of the product forming region 4 corresponding to the pilot hole 15. As shown in FIG. Further, in a state in which the belt-shaped material 2 (product forming area 4) is positioned by the positioning portion 17, the flow path 8 is formed in the product forming area 4 as well. After that, the belt-shaped material 2 is sent to the right side in FIG.

When the mold is clamped while the product forming area 4 is positioned corresponding to the punched portion 13, the holes 6 and 7 are formed in the portions of the product forming area 4 where the holes 5 to 7 are to be formed. be. At this time, the product forming area 4 adjacent to the product forming area 4 on the front side in the feed direction of the belt-shaped material 2 is also positioned corresponding to the punching part 13, and the same product is formed as the mold is clamped. A hole 5 is formed in the region 4 and a positioning portion 17 is punched out. Holes 6 and 7 were formed in the product forming area 4 during the previous mold clamping. By inserting the first pins 22 into the positioning portions 17 of the adjacent product forming areas 4 on the rear side in the feeding direction (left side in FIG. 1), the belt-shaped material 2 is positioned.

After that, the belt-shaped material 2 is fed to the right side of FIG. 1 at the above-mentioned pitch while the mold is being opened. The boundary between the product forming area 4 and the adjacent product forming area 4 on the rear side of the belt-shaped material 2 in the feeding direction is positioned corresponding to the dividing portion 14 . By clamping the molds in this state, the belt-shaped material 2 is divided at the boundary, and the product forming area 4 located at the front end of the belt-shaped material 2 in the feed direction is separated from the belt-shaped material 2 and separated from the separator 3. Become.

Next, in the progressive press working device 1, a structure for eliminating warping (bending) of the belt-shaped material 2 due to press working will be described.
In the progressive press machine 1, the belt-shaped material 2 is fed in the longitudinal direction at a pitch corresponding to the width of the product forming area 4 each time the mold is opened, and pilot hole forming portions 11, 11 Press working is performed by a forming portion 12, a punching portion 13, and a dividing portion 14. As shown in FIG. For this reason, warping (bending) due to press working is more likely to occur in the front portion of the belt-shaped material 2 in the feeding direction. If press working is performed in such a warped state, it becomes difficult to press an appropriate position in the product forming area 4. Therefore, the progressive press working apparatus 1 has the following structure. Adopted.

That is, as shown in FIG. 5, lower rollers for placing the belt-shaped material 2 on the lower die 10 side of the pilot hole forming part 11, the forming part 12, and the punching part 13 of the progressive press machine 1 are respectively provided. 29 and a supporting member 30 for supporting the lower roller 29 so as to be able to roll. The lower roller 29 and the support member 30 are provided at a predetermined interval along the longitudinal direction of the belt-shaped material 2 . Furthermore, the lower rollers 29 and the support members 30 are provided on both sides of the belt-shaped material 2 in the width direction (the direction perpendicular to the plane of FIG. 5).

Each support member 30 is supported by a spring 31 so as to be vertically movable with respect to the lower die 10 . These support members 30 are connected to each other by horizontally extending connecting plates 32 so as to be vertically movable. The lower roller 29 rotatably supported by each support member 30 appears and disappears with respect to the lower mold 10 as each support member 30 moves up and down. The lower roller 29 and the support member 30 are urged by the urging force of the spring 31 serving as an urging member so that the lower roller 29 protrudes from the lower mold 10 toward the upper mold 9 . The lower roller 29 can be retracted into the lower mold 10 against the biasing force of the spring 31 .

An upper roller 35 serving as a holding member and the upper roller 35 are provided in the portions of the pilot hole forming portion 11, the forming portion 12, and the punching portion 13 of the progressive press working device 1 on the side of the upper die 9, respectively. A support member 36 is provided for rolling support. The support member 36 is vertically movable with respect to the upper die 9 , and the upper roller 35 rotatably supported by the support member 36 appears and disappears with respect to the upper die 9 as the support member 36 moves vertically. The upper roller 35 and the support member 36 are provided at a predetermined interval along the longitudinal direction of the belt-shaped material 2 . Furthermore, the upper rollers 35 and the support members 36 are respectively provided corresponding to both sides of the belt-shaped material 2 in the width direction (the direction perpendicular to the paper surface of FIG. 5), and the lower rollers 29 and the support members 30 is located corresponding to Also, the upper roller 35 faces the correspondingly positioned lower roller 29 .

A stripper plate 41 , which can be projected and retracted with respect to the upper die 9 , is connected to the upper die 9 via a spring 42 at a portion of the upper die 9 facing the belt-shaped material 2 . The stripper plate 41 protrudes from the upper die 9 toward the lower die 10 (the band-shaped material 2), and sinks into the upper die 9 while compressing the spring 42. - 特許庁The upper roller 35 and the support member 36 pass through the stripper plate 41 in the vertical direction while being vertically movable relative to the stripper plate 41 .

The upper roller 35 and the lower roller 29 are positioned on both sides of the belt-shaped material 2 in the thickness direction, and the upper roller 35 and the lower roller 29 facing each other form a pair. Of the pair of upper and lower rollers 35 and 29, one pair is provided in the pilot hole forming portion 11, two pairs are provided in the forming portion 12, and three pairs are provided in the punching portion 13. two pairs are provided. The three pairs in the punching part 13 and the pair on the front side in the feed direction (right side in FIG. 5) of the two pairs in the forming part 12 form a strip shape when the mold is opened. The distance between the upper roller 35 and the lower roller 29 is made shorter toward the rear side (left side in FIG. 5) of the feed direction of the material 2 .

One pair of the pilot hole forming portions 11 and one of the two pairs of forming portions 12 on the rear side in the feed direction (left side in FIG. 5) of the forming portion 12 are in the open state. The distance between the upper roller 35 and the lower roller 29 is equal to the frontmost pair in the feed direction of the strip-shaped material 2 among the three pairs in the punching section 13 .

FIG. 6 shows the front side (the right side in FIG. 5) of the pair of upper and lower rollers 35 and 29 in the forming section 12 of FIG. 4 schematically shows the surrounding structure;

As can be seen from FIG. 6 , in the lower mold 10 , the connecting plate 32 is connected with a retraction block 33 projecting from the lower mold 10 toward the upper mold 9 side. By being connected to the connecting plate 32 , the retraction block 33 can move up and down integrally with the lower roller 29 and the support member 30 , in other words, integrally with the retracting movement of the lower roller 29 with respect to the lower die 10 . there is Also, the retraction block 33 is supported by a spring 34 so as to be vertically movable with respect to the lower die 10 . These retraction blocks 33 and springs 34 are provided for each pair of upper and lower rollers 35 and 29 . It should be noted that the spring 34 also plays a role of the urging member as well as the spring 31 .

On the other hand, in the upper die 9 , the upper roller 35 and the support member 36 are connected to the pressing block 37 via the connecting bar 43 . By being connected to the connecting bar 43 , the pressing block 37 can move up and down integrally with the upper roller 35 and the support member 36 , in other words, integrally with the retracting movement of the upper roller 35 with respect to the upper die 9 . there is The pressing block 37 is provided so as to protrude from the upper die 9 toward the lower die 10 at a position facing the retraction block 33 of the lower die 10, and is pushed through a spring 44 that functions as an elastic member. It is connected to the upper die 9 . The elastic force of the spring 44 urges the upper roller 35 to protrude from the upper die 9 toward the lower die 10 . Also, the upper roller 35 can be retracted into the upper die 9 against the elastic force of the spring 44 . Therefore, the upper roller 35 is connected to the upper die 9 via the spring 44 .

A connecting bar 43 , a pressing block 37 , and a spring 44 are individually provided for each pair of the upper and lower rollers 35 and 29 . For this reason, the upper rollers 35 can move up and down (appear and retract) with respect to the upper die 9 individually for each pair. When the upper mold 9 approaches the lower mold 10 during mold clamping, the pressing block 37 of the upper mold 9 comes into contact with the retraction block 33 . At this time, the upper roller 35 and the lower roller 29 approach to a distance corresponding to the thickness of the belt-shaped material 2, for example, a distance slightly longer than the thickness of the belt-shaped material 2. That is, when the pressing block 37 and the retracting block 33 are in contact with each other, the retracting block 33, the lower roller 29, and the support member 30 are arranged so that the distance between the upper roller 35 and the lower roller 29 becomes the distance described above. A vertical positional relationship between the block 37, the upper roller 35, and the support member 36 is determined.

When the upper mold 9 comes closer to the lower mold 10 during mold clamping, the pressing block 37 presses the retraction block 33 accordingly. At this time, the elastic force of the spring 44 directed toward the retraction block 33 acts on the pressing block 37 , while the biasing force of the springs 31 and 34 directed toward the pressing block 37 acts on the retraction block 33 . The total value of the elastic force of the spring 44 is made smaller than the total value of the biasing forces of the springs 31 and 34 . Therefore, when the pressing block 37 presses the retraction block 33 as the upper die 9 approaches the lower die 10 during mold clamping, the spring 44 shrinks and the pressing block 37 and the upper roller 35 sink into the upper die 9. is displaced to Incidentally, as for the total elastic force of the spring 44, the total elastic force of the springs 44 and 42 is smaller than the total urging force of the springs 31 and 34. As shown in FIG.

The upper die 9 is provided with a stopper surface 45 that restricts displacement of the pressing block 37 with respect to the upper die 9 in the retracting direction. Then, the pressing block 37 is pushed into the upper mold 9, and the pressing block 37 comes into contact with the stopper surface 45, thereby restricting the displacement of the pressing block 37 with respect to the upper mold 9 in the retracting direction. Also, at this time, the spring 44 is in a state of maximum contraction. At this time, while the upper roller 35 and the lower roller 29 are maintained close to each other by a distance corresponding to the thickness of the belt-shaped material 2, the entire upper roller 35 is retracted into the upper die 9.例文帳に追加That is, the position of the stopper surface 45 in the upper die 9 in the vertical direction is determined so as to achieve this.

6, of the pairs of the upper roller 35 and the lower roller 29, the pair on the front side (the right side in FIG. 5) in the feeding direction of the strip-shaped material 2 in the forming section 12 is shown. For other pairs in which the distance between the upper roller 35 and the lower roller 29 is long, the spring 44 is shorter than the spring 44 shown in FIG. The shorter the spring 44 is, the closer the position of the upper roller 35 is to the upper mold 9 when the mold is opened, and the shorter the distance between the upper roller 35 and the lower roller 29 is.

Next, the operation mode of the upper mold 9 and the lower mold 10 at the time of mold clamping of the progressive press working apparatus 1, specifically, the pressing block 37, the upper roller 35 and the support member 36, the stripper plate 41, the retraction block 33, and the lower roller 29 and support member 30 will be described with reference to FIGS. 6 to 10. FIG.

When the molds are opened as shown in FIG. 6, the belt-shaped material 2 placed on the lower rollers 29 of the lower mold 10 is stretched in the longitudinal direction (the direction orthogonal to the paper surface of FIG. 6) at a pitch corresponding to the width of the product forming area 4. ). At this time, the lower roller 29 on which the belt-shaped material 2 is placed is rolled to prevent the belt-shaped material 2 being fed from being scratched as described above.

Thereafter, when the upper mold 9 approaches the lower mold 10 as the molds are clamped, the pressing block 37 of the upper mold 9 comes into contact with the retraction block 33 as shown in FIG. At this time, the upper roller 35 and the lower roller 29 approach to a distance corresponding to the thickness of the belt-shaped material 2 . If the belt-shaped material 2 is warped, when the upper roller 35 and the lower roller 29 approach each other as described above, the upper roller 35 contacts the warped belt-shaped material 2, thereby suppressing the warp. . When the upper roller 35 suppresses the warping of the belt-shaped material 2 in this way, the roller 35 rolls when the upper roller 35 and the belt-shaped material 2 collide, so that the belt-shaped material 2 is not scratched. be done.

After the pressing block 37 of the upper die 9 hits the retracting block 33 of the lower die 10 , the pressing block 37 and the upper roller 35 are pushed by the elastic force of the spring 44 when the upper die 9 approaches the lower die 10 as the mold is closed. , the same roller 35 is displaced in the direction of being immersed in the upper die 9 . The displacement at this time is performed while maintaining the distance between the upper roller 35 and the lower roller 29 at a value corresponding to the thickness of the belt-shaped material 2 . Then, as shown in FIG. 8 , when the stripper plate 41 of the upper die 9 comes into contact with the strip-shaped material 2 placed on the lower roller 29 of the lower die 10 , the stripper plate 41 comes into contact with the lower die 10 as the upper die 9 approaches the lower die 10 . With the band-shaped material 2 sandwiched between the lower roller 29 of the lower mold 10 and the lower roller 29 of the lower mold 10, the belt-like material 2 is retracted into the upper mold 9 against the elastic force of the spring 42 as shown in FIG. At this time, the upper roller 35 is also immersed in the upper die 9 .

As described above, when the stripper plate 41 and the upper roller 35 are immersed in the upper die 9 and the belt-shaped material 2 hits the upper die 9 and the spring 44 is contracted to the maximum, the upper die 9 approaches the lower die 10, A pressing block 37 presses the retraction block 33 of the lower mold 10 against the biasing forces of the springs 31 and 34 . As a result, as shown in FIG. 10, the retraction block 33 and the lower roller 29 are displaced in the direction in which the lower roller 29 is immersed in the lower mold 10, and the belt-shaped material 2 placed on the lower roller 29 and in contact with the upper mold 9 is displaced. hits the lower die 10 . Then, the product forming region 4 of the belt-shaped material 2 is press-worked by the press-working part between the upper die 9 and the lower die 10, that is, the pilot hole forming part 11, the forming part 12, the punching part 13, and the dividing part. Pressing by 14 is performed.

After that, when the mold is opened, as shown in FIG. 6, the pressing block 37 of the upper mold 9, the upper roller 35 and the support member 36 are returned to their original positions by the elastic force of the spring 44, and the stripper plate 41 is pushed back by the spring 42. returns to its original position due to the elastic force of On the other hand, in the lower mold 10, the retraction block 33, the lower roller 29 and the support member 30 are returned to their original positions by the biasing forces of the springs 31 and 34.

Next, the effects of the progressive press working apparatus 1 according to this embodiment will be described.
(1) In the progressive press machine 1, the belt-shaped material 2 placed on the lower roller 29 of the lower mold 10 is longitudinally fed at a pitch corresponding to the width of the product forming area 4 each time the mold is opened. At this time, since the lower roller 29 rolls with the movement of the belt-shaped material 2, the belt-shaped material 2 is prevented from being rubbed during the movement. Further, the product forming regions 4 arranged in the longitudinal direction of the band-shaped material 2 are press-worked by press-working units such as a pilot hole forming unit 11, a forming unit 12, a punching unit 13, and a dividing unit 14 for each mold clamping. applied. More specifically, when the molds are clamped, the portion on the upper mold 9 side and the portion on the lower mold 10 side of the press working portion approach each other, and press working is performed on the product forming area 4 of the band-shaped material 2 . Since such press working is performed, warping (bending) due to the press working is more likely to occur in the front portion of the belt-shaped material 2 in the feeding direction. However, even if the belt-shaped material 2 is warped, when the upper mold 9 and the lower mold 10 approach each other during mold clamping, the upper roller 35 of the upper mold 9 hits the warped belt-shaped material 2. The warp can be suppressed.

After that, when the upper roller 35 and the lower roller 29 approach the distance corresponding to the thickness of the belt-shaped material 2 as the molds are clamped, the pressing block 37 of the upper mold 9 hits the retraction block 33 of the lower mold 10, and the upper mold 9 approaches the lower mold 10 , the pressing block 37 and the upper roller 35 are displaced against the elastic force of the spring 44 in the direction of retracting the upper roller 35 into the upper mold 9 . The displacement at this time is performed while maintaining the distance between the upper roller 35 and the lower roller 29 at a value corresponding to the thickness of the belt-shaped material 2 . Further, when the upper roller 35 is immersed in the upper die 9 and the belt-shaped material 2 hits the upper die 9 and the spring 44 is contracted to the maximum, the pressing block 37 is moved to the lower die 10 as the upper die 9 approaches the lower die 10 . The retraction block 33 of 10 is pressed against the biasing force of the springs 31 and 34 . As a result, the retraction block 33 and the lower roller 29 are displaced in the direction in which the lower roller 29 is immersed in the lower mold 10, and the belt-shaped material 2 placed on the lower roller 29 and in contact with the upper mold 9 hits the lower mold 10, and The product forming area 4 of the band-shaped material 2 is pressed by the press working portion between the upper die 9 and the lower die 10 .

Thus, when the mold is clamped, the upper roller 35 and the lower roller 29 approach to a distance corresponding to the thickness of the belt-shaped material 2, and while maintaining that distance, the upper roller 35 and the lower roller 29 move the upper mold. The product forming area 4 of the band-shaped material 2 is pressed while being immersed in the lower mold 10 and the belt-shaped material 9 . Therefore, the warp of the belt-shaped material 2 is eliminated before the press working, and it is possible to suppress the product forming region 4 of the belt-shaped material 2 from being press-worked in such a warped state. .

(2) Since the upper roller 35 can roll, the upper roller 35 rolls when the upper roller 35 hits the belt-shaped material 2 warped by press working and suppresses the warp during mold clamping. It is possible to suppress the belt-shaped material 2 from being scratched by the movement. It should be noted that the fuel cell separator 3 is required to be free from scratches during manufacturing because scratches may hinder the function of the product. be able to.

(3) When clamping the mold, the upper roller 35 and the lower roller 29 approach to a distance slightly longer than the thickness of the belt-shaped material 2, and the upper roller 35 and the lower roller 29 move upward while maintaining that distance. The product forming area 4 of the band-shaped material 2 is pressed while being immersed in the mold 9 and the lower mold 10 . Therefore, when the belt-like material 2 is sandwiched between the upper roller 35 and the lower roller 29 to eliminate the warp during mold clamping, the belt-like material 2 is not crushed by the upper roller 35 and the lower roller 29.例文帳に追加Therefore, it is possible to suppress the formation of impressions on the band-shaped material 2 due to the nipping between the upper roller 35 and the lower roller 29 .

(4) In the progressive press working apparatus 1, each pair of the upper roller 35 and the lower roller 29 is provided at a predetermined interval in the longitudinal direction of the belt-shaped material 2. As shown in FIG. Therefore, the belt-shaped material 2 warped by pressing is sandwiched between the upper rollers 35 and the lower rollers 29 in the longitudinal direction when the molds are clamped. be done.

(5) The belt-shaped material 2 tends to warp more at the front side in the feeding direction during press working. Correspondingly, among the pairs of upper and lower rollers 35 and lower rollers 29, the three pairs in the punching section 13 and the strip 2 of the two pairs in the forming section 12 The pair on the front side in the feed direction (right side in FIG. 2) is arranged as follows. That is, when the molds are opened, the distance between the upper roller 35 and the lower roller 29 is set to be shorter for the rear side (left side in FIG. 2) in the feeding direction of the strip-shaped material 2 among the above pairs. there is Therefore, during the mold clamping process, each pair of the upper roller 35 and the lower roller 29 can gradually straighten the belt-shaped material 2 that is warped as described above.

It should be noted that the above embodiment can be modified, for example, as follows. The above embodiments and the following modifications can be combined with each other within a technically consistent range.
The distance between the pair of upper and lower rollers 35 and lower rollers 29 at the time of mold opening and mold clamping can be changed as appropriate. Although the distance between the upper roller 35 and the lower roller 29 is set to correspond to the thickness of the belt-shaped material 2 at the time of mold clamping, such a distance does not necessarily have to be slightly longer than the thickness of the belt-shaped material 2. It is also possible to set the distance equal to that of the belt-shaped material 2 instead of the distance.

- The number of the pair of upper and lower rollers 35 and lower rollers 29 may be changed as appropriate.
- A pressing plate or the like may be used instead of the upper roller 35 as a pressing member.
- The upper roller 35 and the support member 36 may be omitted, and the stripper plate 41 may function as a restraining member and the spring 42 may function as an elastic member.

In this case, when the upper die 9 and the lower die 10 approach each other during mold clamping, even if the strip-shaped material 2 is warped, the stripper plate 41 of the upper die 9 hits the warped strip-shaped material 2. , the warpage can be suppressed.

After that, when the stripper plate 41 and the lower roller 29 approach the distance corresponding to the thickness of the belt-shaped material 2 (in this case, the distance equal to the thickness) as the mold is clamped, the upper mold 9 is further moved from the lower mold 10. As the stripper plate 41 approaches, the stripper plate 41 is displaced against the elastic force of the spring 42 so as to be retracted into the upper die 9 . The displacement at this time is performed while maintaining the distance between the stripper plate 41 and the lower roller 29 at a value corresponding to the thickness of the strip-shaped material 2 .

Furthermore, when the stripper plate 41 is immersed in the upper die 9 and the belt-shaped material 2 hits the upper die 9, the pressing block 37 moves the retracting block 33 of the lower die 10 as the upper die 9 approaches the lower die 10. Push against the biasing force of 34 . As a result, the retraction block 33 and the lower roller 29 are displaced in the direction in which the lower roller 29 is immersed in the lower mold 10, and the belt-shaped material 2 placed on the lower roller 29 and in contact with the upper mold 9 hits the lower mold 10, and The product forming area 4 of the band-shaped material 2 is pressed by the press working portion between the upper die 9 and the lower die 10 .

- Although the separator 3 for a fuel cell was illustrated as the plate-shaped product manufactured by the progressive press processing apparatus 1, it is also possible to manufacture other plate-shaped products.

REFERENCE SIGNS LIST 1 Progressive press working device 2 Strip material 3 Separator 4 Product forming areas 5 to 7 Holes 8 Flow path 9 Upper mold 10 Lower mold 11 Pilot hole forming part 12 Molding part 13 Punching part REFERENCE SIGNS LIST 14: Dividing portion 15: Pilot hole 16: Punch for pilot hole 17: Positioning portion 18: Flow path forming surface 19: Burring forming portion 20: Burring pin 21: Die 22: First pins 23 to 25: Punch for fluid hole 26 Second pin 27 Cutting punch 28 Stripper 29 Lower roller 30 Support member 31 Spring 32 Connection plate 33 Retraction block 34 Spring 35 Upper roller 36 Support member 37 Pressing block 41 Stripper plate 42... Spring 43... Connection bar 44... Spring 45... Stopper surface

Claims (5)

A belt-shaped material is arranged so as to extend horizontally between an upper die and a lower die, while a plurality of pressed parts are formed along the longitudinal direction of the belt-shaped material at the opposing portions of the upper die and the lower die. are provided in order, and each time the mold opening and mold closing of the upper mold and the lower mold are repeated, the belt-like material is moved in the longitudinal direction at a pitch corresponding to the width of the product forming area in the belt-like material. In a progressive press working device that forms a plate-shaped product through press working on the product forming area of the strip-shaped material in the plurality of press working parts by mold clamping,
It is for placing the strip-shaped material, and is provided so as to be able to roll on the lower mold side of the press working part and to be retractable with respect to the lower mold. a lower roller that is biased by a biasing member so as to protrude and that can be retracted into the lower mold against the biasing force;
a retraction block that is provided on the lower mold and moves up and down together with the retracting movement of the lower roller with respect to the lower mold;
It is provided so as to be protrusible and retractable in the portion on the upper die side of the press working part, protrudes from the upper die toward the lower die, and is connected to the upper die via an elastic member, and the elastic force of the elastic member a holding member that can be immersed into the upper mold against
a pressing block, which is the upper mold and which is provided at a position facing the retraction block and which moves up and down integrally with the movement of the holding member with respect to the upper mold;
and
The elastic force of the elastic member is smaller than the urging force of the urging member, and when the pressing block abuts against the retraction block due to mold clamping, the holding member and the lower roller are in the belt-like shape. A progressive press working device characterized in that it is adapted to approach to a distance corresponding to the thickness of a material. 2. The progressive press working apparatus according to claim 1, wherein said holding member is an upper roller supported so as to be able to roll. 3. The apparatus according to claim 2, wherein said upper roller and said lower roller are a pair of upper and lower rollers, and each pair of said upper roller and said lower roller is provided at a predetermined interval in the longitudinal direction of said belt-shaped material. progressive press machine. Each pair of the upper roller and the lower roller, which is a pair of upper and lower rollers, is arranged so that the distance between the upper roller and the lower roller becomes shorter toward the rear side in the feed direction of the strip-shaped material when the mold is opened. The progressive press working device according to claim 3. The progressive press working apparatus according to any one of claims 1 to 4, wherein the plate-like product is a separator for a fuel cell.