JP7366455B1 - Press equipment and pressed steel plate manufacturing method - Google Patents

Abstract

An object of the present invention is to provide a press apparatus and a method for manufacturing a pressed steel plate that reduce the possibility that a blank portion of a steel plate material conveyed after punching out a pressed steel plate is caught in the punched pressed steel plate. A press device 1 punches a band-shaped steel plate 10, which is intermittently conveyed in one conveyance direction, into a predetermined shape to form a pressed steel plate 7. The press device 1 includes an upper mold and a lower mold 5 for punching the steel sheet material 10 into a predetermined shape, and a conveyance device 6 for conveying the steel sheet material 10. The pressing devices 2 are arranged in pairs facing each other in the width direction and can be moved toward and away from the ends 11 in the width direction of the steel plate material 10, respectively. The pressing device 2 is moved away from the steel plate 10 when the upper die and the lower die 5 are at the punching position, and when the upper die is at the top dead center, the center part in the width direction of the steel plate 10 is moved upward. The ends 11 of the steel plate material 10 in the width direction are pressed so as to be convex. [Selection diagram] Figure 4

Description

The present invention relates to a progressive press device and a method for manufacturing a pressed steel plate using the press device.

BACKGROUND ART Conventionally, press apparatuses and press working methods have had the following problems, and inventions have been made to address them. Explain the conventional issues. When producing pressed steel plates as pressed products, the width of the steel plates used is increasing, and the thickness of the steel plates is becoming thinner. The rigidity of the steel plate material has decreased, and when it is fed progressively in the press equipment, it bends downward and gets caught in the die of the lower mold or the punched press steel plate during feeding, resulting in conveyance failure, and in the worst case. There was a problem in that it led to damage to the press equipment.

Conventional problems will be explained with reference to FIGS. 15 and 16. FIG. 15 is a conceptual diagram illustrating the final pressing process in a progressive press device. At the final press step position P, the pressed steel plate 107 is punched out and moved downward, and the steel plate material 110 is further conveyed in the forward direction. At this time, a blank portion 108 is formed in the steel plate material 110. Generally, in order to reduce the waste portion of the steel plate material 110, the blank portion 108 occupies a large proportion in the width direction. As a result, the rigidity of the steel plate material 110, especially after the final pressing step, decreases and it becomes easily bent.

FIG. 16 shows a state in which the steel plate material 110 is transported in the forward direction after the final pressing step. As an example, when the pressed steel plate 107 is a stator for an electromagnetic motor, it has an annular skewer portion 107a. The steel plate material 110 is easily bent around the blank portion 108 and may get caught in the die of the lower mold or the pressed steel plate 107 that has been pressed. In particular, when the pressed steel plate 107 has the skewer tooth portion 107a, the blank portion 108 of the steel plate material 110 is often bent downward and caught on the skewer tooth portion 107a at the G section in FIG. Note that, in order to distinguish the elements described above from the elements of the present invention, elements having similar functions are written with 100 added to the reference numerals of the elements of the present invention.

As a conventional example, there has been a proposal described in Patent Document 1 to address the problems described above. For example, as shown in FIGS. 17 and 18, the press apparatus described in Patent Document 1 includes a lower mold 105 in which a plurality of processing stations are arranged side by side, and It has an upper mold 104 which is placed in the upper mold 104 and moves up and down. After sequentially punching the progressively fed steel plate material 110 using the punch 137 of the upper mold 104 and the die 141 of the lower mold 105 to form a pressed steel plate 107 in a desired shape, the pressed steel plates 107 are laminated (laminated). This is a press device 101 (forming a pressed steel plate). Note that Patent Document 1 describes that the press device 101 is a punching die device, the steel plate material 110 is a plate material, and the pressed steel plate 107 is a core piece, but in order to match the names of the elements of the present invention, the above-mentioned Describe it.

The invention of Patent Document 1 will be described with reference to FIGS. 17 and 18. The lower die 105 of the press device 101 is provided with a lifter portion that lifts the steel plate material 110 from an upper surface position 115 of the lower die 105 when the steel plate material 110 is fed sequentially. The lifter section includes a first lifter group having a plurality of first lifters 119 arranged in the outer peripheral area of each processing station, and the upper surface of the die 141 in which a punching hole 144 for punching the outer shape of the pressed steel plate 107 is formed. and a second lifter group including a second lifter 121 disposed on the upper surface of the die holder 143 holding the die holder 143. Furthermore, it is described that the second lifter 121 is preferably arranged in an annular shape along the inner periphery of the punched hole 144 for punching out the outer shape.

According to this, since the second lifter 121 is disposed on the upper surface of the die 141 in which the punching hole 144 for outline punching is formed or on the upper surface of the die holder 143 that holds the die 141, in the steel plate material 110, the pressed steel plate The periphery of the blank part 108 of the steel plate 107 can be always supported, and the amount of deflection in the area where the rigidity of the steel plate 110 is reduced by punching the pressed steel plate 107 from the steel plate 110 can be reduced, and the steel plate 110 and the outer shape can be punched. It is described that it is possible to prevent catching with the punched hole 144.

In addition, in the press device 101, when the second lifter 121 is arranged in an annular manner along the inner circumference of the punching hole 144 for punching the outer shape, in the steel plate material 110, the vicinity of the blank part 108 of the press steel plate 107 is directly pressed. It is described that the amount of deflection of the steel plate material 110 existing above the punching hole 144 for punching the outer shape can be reliably reduced.

Japanese Patent Application Publication No. 2015-123469

However, the invention described in Patent Document 1 has the following problems. This will be explained with reference to FIGS. 19 and 20. As shown in FIG. 19, when the press steel plate 107 is punched out at the final press process position P of the press device 101 and the steel plate material 110 is conveyed downstream, the blank portion 108 passes over the press steel plate 107. At this time, the second lifter 121 is removed from the periphery of the blank part 108, and the second lifter 121 and the first lifter hatched in a grid form support the steel plate material 110 at a position close to the blank part 108. Only the lifter 119 is included. Note that the position where the second lifter 121 supports the steel plate material 110 changes as the steel plate material 110 is transported.

Then, as shown in FIG. 20, even if the steel plate material 110 is supported by the second lifter 121, as the steel plate material 110 is conveyed, the center portion in the width direction is deflected downward. In this case, as shown in FIG. 19, for example, if the pressed steel plate 107 has a skewer tooth part 107a on the inner periphery, the steel plate material 110 may bend downward and the blank part 108 may get caught inside the skewer tooth part 107a. .

An object of the present invention is to provide a press device and a method for manufacturing a pressed steel plate that reduce the possibility that a blank portion of a steel plate material conveyed after punching a pressed steel plate gets caught on the punched pressed steel plate.

In the press device according to the first aspect of the present invention, a band-shaped steel plate material that is intermittently conveyed in one conveyance direction is punched into a predetermined shape to form a pressed steel plate, and the steel plate material is stamped into a predetermined shape. An upper die and a lower die that are relatively movable in an up-down direction perpendicular to the conveyance direction in order to punch into a shape; a conveyance device for conveying the steel plate; The orthogonal direction is defined as the width direction, and pressing devices are arranged in pairs opposite to each other in the width direction and capable of approaching and separating from the ends of the steel plate material in the width direction, and in the up and down direction, the upper mold The position furthest upward from the lower mold is defined as the top dead center, and in the vertical direction, a punch in the upper mold and a die in the lower mold are used to punch out the steel plate material. position, the pressing device is spaced apart from the steel plate material when the upper die and the lower die are in the punching position, and is spaced apart from the steel plate material when the upper die is at the top dead center. The steel plate material is conveyed with the end portions of the steel plate material in the width direction being pressed so that the center portion in the width direction is convex upward.

According to this, the pressing device of the press device is separated from the steel plate material when the upper die and the lower die are at the punching position, so that the press steel plate can be punched without distortion in the steel plate material. Furthermore, when the upper mold is at the top dead center, the pressing device presses the ends of the steel plate material in the width direction so that the center part of the steel plate material in the width direction becomes convex upward. Therefore, when the steel plate material is conveyed, it is possible to reduce conveyance defects caused by the blank portion getting caught on the punched press steel plate.

Further, in the press device, the pressing device includes a contact portion capable of contacting an end portion in the width direction of the steel plate material, the contact portion has a predetermined contact length in the vertical direction, and the contact portion has a predetermined contact length in the vertical direction, and When the pair of pressing devices face each other in the width direction, the distance in the width direction between one of the contact portions and the other contact portion is In the contact length, a lower distance may be longer than an upper distance in the vertical direction.

In this case, in the pressing device of the press device, the contact portion is inclined linearly with respect to the width direction during the contact length. The distance in the width direction between one contact part and the other contact part is longer on the lower side than on the upper side in the vertical direction in terms of the contact length. Since the steel plate material is guided downward at the ends in the width direction, when the ends in the width direction are pressed by the pressing device, the central part in the width direction becomes convex upward. Therefore, when the steel plate material is conveyed, it is possible to reduce conveyance defects caused by the blank portion being caught by the punched press steel plate.

Further, the pressing device of the press device includes a pair of first pressing devices on the downstream side in the conveyance direction with respect to the final press process position in the upper mold and the lower mold, and a pair of first pressing devices on the upstream side. A second pressing device may also be provided.

In this case, since the pressing devices are provided on the downstream and upstream sides of the final press step position, it is possible to more reliably make the central portion of the steel plate material upward in the width direction. Therefore, when the steel plate material is conveyed, it is possible to reduce conveyance defects caused by the blank portion getting caught on the punched press steel plate.

Further, the press device includes a pair of first guide portions that are adjacent to the first press device on the downstream side in the conveying direction and guide the steel plate material in the width direction, and a pair of first guide portions that are adjacent to the first press device on the downstream side in the conveying direction, and A pair of second guide portions may be provided adjacent to the upstream side of the conveyance direction and guide the steel plate material in the width direction.

In this case, since guide portions are provided on the upstream and downstream sides of the two pairs of pressing devices, the meandering of the steel plate material in the width direction and the vertical direction is reduced. Furthermore, since the two pairs of pressing devices can press the steel plate material evenly from the width direction, the central portion in the width direction can be made convex more reliably. Therefore, when the steel plate material is conveyed, it is possible to reduce conveyance defects caused by the blank portion getting caught on the punched press steel plate.

Further, in the press device, the pressing device includes a movable part that is movable in the width direction, a guide part that guides movement of the movable part, an elastic member that presses the movable part in the width direction, and a receiving part for receiving an elastic member; and an operating cam part for operating the movable part; the movable part, the guide part, the elastic member, and the receiving part are provided in the lower mold; is provided in the upper mold, the contact portion is formed at an inner end of the movable part in the width direction, and when the upper mold is at the top dead center, the movable part When pressed by the elastic member, the contact portion presses the widthwise end of the steel plate material, and the upper mold descends relative to the lower mold, the movable portion When the contact portion is moved outward in the width direction by the actuation cam portion and the upper die and the lower die are in the punching position, the contact portion is separated from the steel plate material. But that's fine.

In this case, the contact portion of the pressing device moves in the width direction as the upper die moves in the vertical direction, so that it can come into contact with and separate from the end portion of the steel plate material in the width direction. Therefore, the contact portion does not require a driving source for movement, and can be brought into contact with and separated from the end portion of the steel plate material in the width direction in conjunction with the upper mold. When the upper mold descends relative to the lower mold, the contact part moves outward in the width direction and separates from the widthwise end of the steel plate, so the steel plate can be pressed without distortion. Can punch out steel plates. Further, when the upper die is at the top dead center, the pressing device can press the steel plate material from the width direction, so that the center portion in the width direction can be made convex more reliably. Furthermore, when the steel plate material is transported, it is possible to reduce transport defects caused by the blank portion getting caught on the punched press steel plate.

Further, in the press device, the contact portion is a pressure roller, and the pressure roller has a truncated conical shape with a lower outer diameter smaller than an upper outer diameter, and an outer circumferential surface is formed in the width direction. When the end portion of the steel plate material in the width direction is tilted linearly at a predetermined angle and the end portion of the steel plate material in the width direction is pressed by the pressure roller, the end portion of the steel plate material in the width direction is inclined by the pressure roller in the width direction and the width direction. It may be pressed downward in the vertical direction.

In this case, the contact part is a truncated conical pressure roller, and the outer diameter of the lower side is smaller than the outer diameter of the upper side, so that the ends of the steel plate in the width direction are prevented from rolling up, and the width It can be pressed so that the central part of the direction becomes convex upward. Therefore, when the steel plate material is conveyed, it is possible to reduce conveyance defects caused by the blank portion getting caught on the punched press steel plate.

Further, in the press device, the contact portion is a contact formed integrally with a tip portion of the movable portion, and the contact moves in the width direction from the lower side to the upper side in the vertical direction. is tilted at a predetermined angle in a direction in which the steel plate falls inward, and when the end of the steel plate in the width direction is pressed by the contact, the end of the steel plate in the width direction is tilted in the width direction by the contact. , and may be pressed downward in the vertical direction.

In this case, the contact is inclined at a predetermined angle in a direction in which it falls inward in the width direction as it goes from the bottom to the top in the vertical direction in the contact length, thereby preventing the ends of the steel plate material in the width direction from turning up. , it can be pressed so that the center part in the width direction becomes convex upward. Therefore, when the steel plate material is conveyed, it is possible to reduce conveyance defects caused by the blank portion getting caught on the punched press steel plate.

A pressed steel plate manufacturing method according to a second aspect of the present invention is a press steel plate manufacturing method in which a pressed steel plate is manufactured by punching and forming a band-shaped steel plate material that is intermittently conveyed in one conveyance direction using a press device. In the method, the press device includes an upper die and a lower die that are relatively movable in a vertical direction perpendicular to the conveying direction of the steel plate material in order to punch the steel plate material into a predetermined shape; a conveyance device for conveying the steel plate material; a conveyance device for conveying the steel plate material; a direction perpendicular to the conveyance direction and the up-down direction is the width direction; A first step includes a pressing device that can be brought into and out of contact, and the conveying device conveys a predetermined position of the steel plate material to a final press step position; and a first step in which the upper mold is moved relative to the lower mold. a second step of lowering the pressing device to separate it from the steel sheet material, further lowering the upper mold relative to the lower mold and separating the pressing device from the steel sheet material; a third step of punching out the steel plate material to produce a pressed steel plate; and raising the upper die relative to the lower die and pressing the pressing device against the end of the steel plate in the width direction. and a fourth step of causing the center portion of the steel plate material in the width direction to be convex upward, the first step including causing the center portion of the steel plate material in the width direction to be convex in the fourth step. The first step to the fourth step are repeated.

According to this, in the second step and the fourth step, the contact portion can contact and separate from the end portion of the steel plate material in the width direction in conjunction with the upper mold. Therefore, the pressed steel plate manufacturing method can punch out a pressed steel plate without distortion in the steel plate material. In addition, in the fourth step, by raising the upper mold relative to the lower mold and positioning it at the top dead center, the contact part moves in conjunction with the upper mold to move the edge of the steel plate in the width direction. can be pressed. The center portion of the steel plate material in the width direction becomes convex upward due to the pressure of the contact portion. Therefore, the pressed steel plate manufacturing method can reduce conveyance defects caused by the blank portion being caught by the punched press steel plate 7 when conveying the steel plate material.

Further, in the pressed steel plate manufacturing method, the pressing device includes a movable part that is movable in the width direction, a guide part that guides movement of the movable part, and an elastic member that presses the movable part in the width direction. , comprising a receiving part for receiving the elastic member, an operating cam part for operating the movable part, and a contact part capable of contacting the widthwise end of the steel plate material, the movable part, the guide part, The elastic member and the receiving part are provided in the lower mold, the operating cam part is provided in the upper mold, and the second step is to move the upper mold relative to the lower mold. The fourth step includes a step of causing the operating cam portion to actuate the movable portion to separate the contact portion from the steel plate material by lowering the upper mold with respect to the lower mold. By relatively raising the working cam part, the movable part is pressed by the elastic member and moves, and the contact part presses the end of the steel plate material in the width direction. It may also include steps.

In this case, in the second step, the upper mold is lowered relative to the lower mold, so that the operating cam part operates the movable part to separate the contact part from the steel plate material. Therefore, in the second step, the steel plate material can be brought into contact with and separated from the ends in the width direction in conjunction with the upper mold.

Further, in the fourth step, the upper mold is raised relative to the lower mold, so that the contact portion presses the end portion of the steel plate material in the width direction. Since the contact portion can press the steel plate material from the width direction, the central portion in the width direction can be made convex more reliably. Therefore, when the steel plate material is conveyed, it is possible to reduce conveyance defects caused by the blank portion getting caught on the punched press steel plate.

It is a partial cross-sectional view of the press device 1 of the present invention cut in the width direction, and shows when the upper die 4 is in the punching position. It is a partial cross-sectional view of the press apparatus 1 of the present invention cut in the width direction, and shows when the upper die 4 is at the top dead center. It is a planar view of the upper mold 4a of the press apparatus 1a of the first embodiment of the present invention, viewed from below in the vertical direction. It is a planar view of the lower mold 5a of the press apparatus 1a of the first embodiment of the present invention, viewed from above in the vertical direction. 5 is a cross-sectional view taken along the line II in FIG. 4, in which (a) shows a state in which the upper mold 4a is at the top dead center, and (b) shows a state in which the upper mold 4a has started to descend from the top dead center. shows. FIG. 5 is a sectional view taken along the line II in FIG. 4, in which (a) shows a state in which the upper mold 4 has further descended from FIG. Shown in the punching position. It is a partially enlarged view of the pressure roller 20a which is the contact part 20 in FIG. 5(a). In contrast to FIG. 4, this is a diagram showing a case where the pressing devices 2a are a first pressing device 21c and a second pressing device 22c. FIG. 9 is a partially enlarged view of the pressing roller 20c showing the cross section II-II in FIG. 8 in an enlarged manner. It is a planar view of the upper mold 4b of the press apparatus 1b of the second embodiment of the present invention, viewed from the lower side in the vertical direction. It is a planar view of the lower mold 5b of the press apparatus 1b of the second embodiment of the present invention, viewed from above in the vertical direction. 12 is a cross-sectional view showing the cross section III-III in FIG. 11, (a) shows a state where the upper mold 4b is at the top dead center, and (b) shows a state where the upper mold 4b has started to descend from the top dead center. shows. 12 is a cross-sectional view showing the cross section III-III in FIG. 11, (a) shows a state in which the upper mold 4b has further descended from FIG. 5(b), and (b) shows the upper mold 4b and the lower mold 5b Shown in the punching position. It is a partially enlarged view of the contactor 20b which is the contact part 20 in FIG. 12(a). It is an explanatory view of a state in which the steel plates 10 and 110 are punched out to form the pressed steel plates 7 and 107 at the final press process position P. It is a figure explaining a conventional example, and shows a state in which the steel plate material 110 is conveyed downstream after punching a pressed steel plate 107 from the steel plate material 110. It is a diagram explaining a conventional example, and is a plan view showing a state in which a pressed steel plate 107 is punched out from a steel plate material 110 at a final press process position P, with an upper die 104 removed. FIG. 18 is a sectional view taken along section III-III in FIG. 17; It is a diagram explaining a conventional example, and shows a state in which the steel plate material 110 is conveyed to the downstream side after punching a pressed steel plate 107 from the steel plate material 110 at the final press process position P, and is a plan view with the upper mold 104 removed. be. FIG. 20 is a sectional view taken along section IV-IV in FIG. 19;

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, the press apparatus 1 and the press steel plate manufacturing method which embody this invention are demonstrated. Note that the detailed description and the drawings referred to are used to explain technical features that can be adopted by the present invention. The present invention is not limited to these. The configurations shown in the drawings are not intended to be limiting, but are merely illustrative examples.

<<Configuration and effects common to the press apparatus 1 of each embodiment>>
<Configuration common to press apparatus 1 of each embodiment>
The configuration of the press device 1 according to the first aspect of the present invention will be explained. First, with reference to FIGS. 1 to 7, the overall configuration of a press apparatus 1 common to all embodiments will be described. The press device 1 is a so-called progressive press die device in which a strip-shaped steel plate material 10 that is intermittently conveyed in one conveyance direction is punched into a predetermined shape to form a press steel plate 7. The press device 1 includes an upper die 4 and a lower die 5 that are relatively movable in the vertical direction orthogonal to the conveyance direction in order to punch out the steel plate material 10 into a predetermined shape, and a die for conveying the steel sheet material 10. A transport device 6 is provided. The direction perpendicular to the transport direction and the vertical direction is defined as the width direction. As shown in Figure 1, etc., in the width direction, the right side and left side are defined when viewed from the downstream side. The pressing devices 2 are arranged in pairs facing each other in the width direction and can be moved toward and away from the ends 11 in the width direction of the steel plate material 10, respectively.

The configuration of the upper die 4 and the lower die 5 of the press apparatus 1 will be described with reference to FIGS. 1 to 4. As shown in FIGS. 3 and 4, a guide hole 39 is formed in the upper mold 4, a guide post 42 is provided in the lower mold 5, and the guide hole 39 is formed in the upper mold 4. It moves up and down while being guided by 42. As shown in FIGS. 1 and 2, the upper mold 4 includes a punch 37 and a stripper 38 that move in the vertical direction as the upper mold 4 moves in the vertical direction.

As shown in FIG. 1, the punch 37 is pushed down into the outer punch hole 44 of the die 41 fixed to the die holder 43 of the lower die 5, and punches out the steel plate material 10 to form the pressed steel plate 7. At this time, the upper mold 4 is at the bottom dead center. The stripper 38 moves vertically independently of the punch 37. When the punch 37 punches out the steel plate 10, the stripper 38 presses the steel plate 10 in advance, and then the punch 37 presses down on the die 41 to punch out the pressed steel plate 7 from the steel plate 10. After punching out the pressed steel plate 7, the punch 37 rises first, and then the stripper 38 rises. In the vertical direction, the position where the steel plate material 10 is punched out by the punch 37 in the upper die 4 and the die 41 in the lower die 5 is defined as a punching position. As will be described in detail later, the pressing device 2 is separated from the steel plate material 10 when the upper die 4 and the lower die 5 are in the punching position.

In the vertical direction, the top dead center is the position where the upper mold 4 is furthest upward from the lower mold 5. FIG. 2 shows a state in which the upper mold 4 has risen and is at the top dead center. When the upper mold 4 is at the top dead center, the steel plate material 10 is transported by the transport device 6. The conveyance device 6 performs a pull operation to pull out the strip-shaped steel plate material 10 from the downstream side and a push operation to push it out from the upstream side. Although detailed description and illustration of the configuration will be omitted, the steel plate material 10 is conveyed in the direction of the arrow shown in FIG. 4 and the like. Although the details will be described later, when the upper mold 4 is at the top dead center, the pressing device 2 presses the ends of the steel plate 10 in the width direction so that the widthwise center of the steel plate 10 is convex upward. Press.

As shown in FIGS. 1 to 4, when the upper mold 4 descends, the pilot pin 35 of the upper mold 4 is inserted into the pilot pin hole 36 of the lower mold 5b through the pilot hole 7b of the steel plate material 10. Ru. Conversely, when the upper mold 4 moves up, the pilot pin 35 of the upper mold 4 comes out of the pilot pin hole 36 and the pilot hole 7b. This operation is performed every time the upper mold 4 moves up and down in the vertical direction. The steel plate material 10 is intermittently conveyed by the conveyance device 6, and the purpose of inserting and removing the pilot pin 35 described above is to accurately position the steel plate material 10.

Further, as shown in FIGS. 1, 2, 4, and 11, the lower mold 5 includes a lift device 9. The lift devices 9 are provided in pairs on the upstream side and the downstream side of the final press process position P so as to face each other in the width direction. In addition, in FIG. 1 etc., the final press process position P indicates the center position of the punch 37 and die 41 in the final press process. As shown in FIGS. 1 and 2, the lift device 9 includes a lifter 13 and a lifter elastic member 12. As shown in FIGS. The lift device 9 functions to lift the steel plate 10 upward in the vertical direction from the lower mold 5 in order to reduce conveyance resistance when the steel plate 10 is conveyed. The lifter 13 is constantly pushed upward in the vertical direction by the lifter elastic member 12. As shown in FIG. 1, when the upper mold 4 is pressed down, the lifter 13 is pushed down by the upper mold 4. As shown in FIG. 2, when the upper die 4 is at the top dead center, the lifter 13 is in a state where the steel plate material 10 is pushed up. As shown in FIGS. 4 and 11, the lift device 9 is provided at a position spaced apart from the punch 37 and the die 41 at the final press process position P.

<Effects of configuration common to press apparatus 1 of each embodiment>
According to the configuration common to the press apparatus 1 described above, the following effects are achieved. Since the pressing device 2 of the press device 1 is separated from the steel plate 10 when the upper die 4 and the lower die 5 are at the punching position, it is possible to punch out the press steel plate 7 without distortion in the steel plate 10. . Furthermore, when the upper die 4 is at the top dead center, the pressing device 2 presses the end portion 11 of the steel plate material 10 in the width direction so that the center portion of the steel plate material 10 in the width direction is convex upward. . Therefore, when the steel plate material 10 is conveyed, it is possible to reduce conveyance defects caused by the blank portion 8 being caught on the punched pressed steel plate 7.

As mentioned above, the press device 1 includes the lift device 9. When the steel plate material 10 is conveyed by the conveyance device 6, the lifter 13 pushes up the steel plate material 10, so there is no possibility that the steel plate material 10 with punched holes etc. will be caught in the lower mold 5 in the vicinity of the lift device 9. few. However, since there is no lift device 9 in the vicinity of the final press step position P, the steel plate material 10 having a particularly large blank portion 8 has low rigidity and often bends downward. Further, when the pressed steel plate 7 is a stator for an electromagnetic motor, the skewer teeth 7a are formed as shown in FIG. On the other hand, the press apparatus 1 of the present invention has a configuration in which the central part in the width direction of the steel plate material 10 is convex upward in the vicinity of the final press process position P, so that the press steel plate is pressed while the steel plate material 10 is being conveyed. It is possible to reduce conveyance failures caused by getting caught in 7.

<General configuration of pressing device 2>
Next, the general configuration of the pressing device 2 will be explained. As shown in FIGS. 7, 9, and 14, the pressing device 2 includes a contact portion 20 capable of contacting the end portion 11 of the steel plate material 10 in the width direction. The contact portion 20 has a predetermined contact length 23 in the vertical direction. The contact portion 20 is linearly inclined in the width direction between the contact lengths 23 . When a pair of pressing devices 2 face each other in the width direction, the distance in the width direction between one contact portion 20 and the other contact portion 20 is lower than the upper distance L1 in the vertical direction in the contact length 23. Distance L2 is longer.

This will be described in detail with reference to FIGS. 7, 9, and 14. The contact portion 20 is inclined in the width direction so that the upper side thereof is tilted inward in the width direction. As will be described later, in the example shown in FIGS. 7 and 9, the contact portion 20 is a truncated conical pressing roller 20a, and the outer diameter of the upper side is larger than the outer diameter of the lower side. In the example shown in FIG. 14, the contact portion 20 is a contactor 20b, and is formed by a surface or line whose upper side is inclined inward.

Next, a state in which the end portion 11 of the steel plate material 10 in the width direction is pressed by the contact portion 20 of the pressing device 2 will be described. As shown in FIGS. 7, 9, and 14, when the upper mold 4 is at the top dead center, the ends 11 of the steel plate material 10 in the width direction are Pressed in the downward direction. The steel plate material 10 is convex upwardly so that the center portion in the width direction is spaced apart from the lower mold 5. Since each of the contact portions 20 is formed to be inclined, the end portion 11 of the steel plate material 10 in the width direction is pressed in the direction of arrow B by the contact portion 20 .

Next, the position where the pressing device 2 is arranged will be explained. As shown in FIGS. 4, 8, and 11, the pressing device 2 includes a pair of first pressing devices on the upstream side in the conveyance direction with respect to the final press process position P in the upper mold 4 and the lower mold 5. 21, and a pair of second pressing devices 22 on the downstream side. The first pressing device 21 and the second pressing device 22 are each configured as a pair, and as shown in FIGS. 4 and 11, they are located at opposite positions in the width direction, so that the pressing devices 2 are provided at four locations in total. Note that two pairs of first pressing devices 21 may be provided on the upstream side, and two pairs of second pressing devices 22 may be provided on the downstream side.

<Effects of the general configuration of the pressing device 2>
According to the general configuration of the pressing device 2 explained above, the following effects are achieved. As shown in FIGS. 7, 9, and 14, in the pressing device 2 of the press device 1, the contact portions 20 are linearly inclined in the width direction between the contact lengths 23, and one contact portion 20 and the other contact portion 20 are inclined linearly in the width direction. Regarding the distance in the width direction from the contact portion 20, the distance L2 on the lower side is longer than the distance L1 on the upper side in the vertical direction. The steel plate material 10 is guided in the direction of arrow B at the widthwise end 11 by the inclination of the contact portion 20, so when the widthwise end 11 is pressed by the pressing device 2, the widthwise end 11 The center portion in the width direction becomes convex upward because the curling up is reduced. Therefore, when the steel plate material 10 is conveyed, it is possible to reduce conveyance defects caused by the blank portion 8 being caught on the punched pressed steel plate 7.

Furthermore, as shown in FIGS. 4, 8, and 11, the pressing devices 2 are provided upstream and downstream of the final press process position P, so that the center portion of the steel plate material 10 in the width direction can be more reliably pressed. It can be made convex upward. Therefore, when the steel plate material 10 is conveyed, it is possible to reduce conveyance defects caused by the blank portion 8 being caught on the punched pressed steel plate 7.

<Detailed configuration of pressing device>
Next, the detailed configuration of the pressing device 2 will be explained. As shown in FIGS. 5 and 12, the pressing device 2 includes a movable part 26 that is movable in the width direction, a guide part 27 that guides the movement of the movable part 26, and an elastic member that presses the movable part 26 in the width direction. 28, a receiving part 30 for receiving the elastic member 28, and an operating cam part 29 for operating the movable part 26. The lower mold 5 is provided with the movable part 26, the guide part 27, the elastic member 28, and the receiving part 30. The operating cam portion 29 is provided in the upper mold 4. In the movable portion 26, movable plates 26a and 26b, which are plate-shaped members extending in the width direction, are constantly pressed inward in the width direction by a compression coil spring, which is an elastic member 28. One side of the compression coil spring, which is the elastic member 28, is supported by a receiving portion 30 fixed to the lower mold 5. The guide portion 27 is formed in a rail shape parallel to the width direction so as to sandwich the movable portion 26 therebetween. The guide portion 27 is fixed to the lower mold 5 with bolts 27a. As shown in FIG. 5 etc., the width of the steel plate material 10 is described as a width 10W.

As shown in FIG. 5A and the like, the movable portion 26 is formed with an operating cam hole 26d that is partially open and a passive cam portion 26h that is an inclined surface. When the upper mold 4 is lowered, the lower tip of the actuating cam part 29 is inserted into the actuating cam hole 26d while pushing the passive cam part 26h of the movable part 26. The actuating part 29a of the actuating cam part 29 is formed with an inclined surface so that when the upper mold 4 descends, the movable part 26 is moved outward in the width direction in combination with the inclination of the passive cam part 26h. As shown in FIGS. 6(b) and 13(b), when the upper die 4 and the lower die 5 are in the punching position in the vertical direction, the actuating cam part 29 has the actuating part 29a in the actuating cam hole 26d. When the base portion 29b is removed, the base portion 29b is fitted into the operating cam hole 26d, and movement of the movable portion 26 in the width direction is restricted.

The contact portion 20 is formed at the inner end in the width direction of the movable plates 26a, 26b. As shown in FIG. 5(a) etc., when the upper mold 4 is at the top dead center, the operating cam portion 29 is vertically separated from the movable portion 26, and the movable portion 26 is pressed by the elastic member 28. The contact portion 20 presses the end portion 11 of the steel plate material 10 in the width direction. When the upper mold 4 descends relative to the lower mold 5, the movable part 26 and the contact part 20 are moved outward in the width direction by the operating cam part 29. When the upper die 4 and the lower die 5 are at the punching position, the contact portion 20 is in a state separated from the steel plate material 10.

As shown in FIGS. 5(a) and 12(a), when the upper die 4 is at the top dead center, the pressing device 2 presses the steel plate material 10 from the width direction. At this time, the actuating part 29a of the actuating cam part 29 is separated from the passive cam part 26h of the movable plates 26a, 26b, and the elastic member 28 presses the movable plates 26a, 26b inward in the width direction. The contact portions 20 at the tips of the movable plates 26a, 26b are pressed against the widthwise ends 11 of the steel plate material 10 by the elastic force of the elastic member 28. The center portion of the steel plate material 10 in the width direction is deformed to be convex upward.

<Effects of the detailed configuration of the pressing device>
As explained above, the detailed configuration of the pressing device 2 provides the following effects. As shown in FIGS. 5, 6, 12, and 13, the contact portion 20 of the pressing device 2 moves in the width direction as the upper mold 4 moves in the vertical direction. Therefore, the contact portion 20 does not require a driving source for movement, and can be brought into contact with and separated from the end portion 11 of the steel plate material 10 in the width direction in conjunction with the vertical movement of the upper mold 4. can.

When the upper mold 4 descends relative to the lower mold 5, the contact portion 20 moves outward in the width direction and separates from the end 11 in the width direction of the steel plate material 10, so that the press device 1 , the pressed steel plate 7 can be punched out without distortion in the steel plate material 10. At this time, the movement of the movable portion 26 is restricted by the base portion 29b of the actuation cam portion 29 fitting into the actuation cam hole 26d, so the contact portion 20 is in a state separated from the widthwise end portion 11 of the steel plate material 10. is maintained. Further, when the upper die 4 is at the top dead center, the pressing device 2 can press the steel plate material 10 from the width direction, so that the center portion in the width direction can be made convex. Therefore, when the steel plate material 10 is conveyed, it is possible to reduce conveyance defects caused by the blank portion 8 being caught on the punched pressed steel plate 7.

<Configuration and effects of the guide section>
Next, a guide section that guides the conveyance of the steel plate material 10 will be explained. As shown in FIGS. 1, 2, 4, 8, and 11, the press device 1 is adjacent to the first press device 21 on the upstream side in the conveying direction, and guides the steel plate material 10 in the width direction. A pair of first guide portions 31 that are adjacent to the second pressing device 22 on the downstream side in the conveying direction and a pair of second guide portions 32 that guide the steel plate material 10 in the width direction are provided. As shown in FIGS. 1 and 2, the first guide section 31 has a guide surface 31a and an eaves section 31b, and the second guide section 32 has a guide surface 32a and an eaves section 32b.

The steel plate material 10 is guided in the width direction by a guide surface 31a and a guide surface 32a. As shown in FIG. 1, when the upper mold 4 and the lower mold 5 are at the punching position in the vertical direction or at the bottom dead center, the steel plate material 10 is pushed toward the lower mold 5 by the stripper 38 in the vertical direction. It is in a state of As shown in FIG. 2, when the upper mold 4 is at the top dead center, the steel plate material 10 is pushed upward by the lift device 9, and the upper surface side contacts the eaves portion 31b and the eaves portion 32b and is moved in the vertical direction. Movement will be regulated.

According to the configuration of the guide section described above, the following effects are achieved. The press device 1 is provided with a first guide portion 31 and a second guide portion 32 on the upstream and downstream sides of the two pairs of press devices 2, respectively, so that the steel plate material 10 can be prevented from meandering in the width direction and the vertical direction. reduced. Furthermore, since the two pairs of pressing devices 2 can press the steel plate material 10 evenly from the width direction, the central portion in the width direction can be made convex more reliably. Therefore, when the steel plate material 10 is conveyed, it is possible to reduce conveyance defects caused by the blank portion 8 being caught on the punched pressed steel plate 7.

<Configuration of press device 1a of first embodiment>
Next, with reference to FIGS. 3 to 7, a press apparatus 1a of a first embodiment according to a first aspect of the present invention will be described. As will be described later, the configuration of a pressing device 2a is different from the pressing device 1b of the second embodiment, which is another embodiment. The pressing devices 2a in the press device 1a of the first embodiment are a first pressing device 21a and a second pressing device 22a. Each contact portion 20 is a pressure roller 20a. As shown in FIG. 7 and the like, the pressing roller 20a is shaped like a truncated cone, the outer diameter of the lower side is smaller than the outer diameter of the upper side, and the outer peripheral surface is inclined at a predetermined angle θ in the width direction. The widthwise end portion 11 of the steel plate material 10 is pressed by the pressing roller 20a toward the width direction, which is the direction of arrow B, and toward the lower side in the vertical direction.

Referring to FIG. 7, the configuration of the pressure roller 20a will be described in detail. The pressure roller 20a is rotatably attached to the inner end of the movable plate 26a in the width direction around a shaft 26e attached in the vertical direction. The movable plate 26a has eaves 26g formed above and below the inner end portion in the width direction, and restricts vertical movement of the pressing roller 20a. The lower end position of the pressing roller 20a in the vertical direction is formed to match the height of the upper surface 15 of the lower mold. Therefore, a recess 16 is formed in a part of the lower mold 5 to allow the lower eaves 26g to escape. The recess 16 is formed at a position avoiding the die 41. Therefore, as shown in FIG. 4, the movement range of the pressing roller 20a of the pressing device 2a is arranged at a position that avoids the range of the die 41 of the lower mold 5. Although FIGS. 5 and 6 describe the first pressing device 21a, the second pressing device 22a also has a similar configuration.

Next, the configurations of the first pressing device 21c and the second pressing device 22c, which are another example, will be explained with reference to FIGS. 8 and 9. As shown in FIG. 8, the first pressing device 21c and the second pressing device 22c are formed with shorter intervals in the conveyance direction than the first pressing device 21a and the second pressing device 22a. As shown in FIG. 9, the pressing roller 20a is similar to the first pressing device 21a and the second pressing device 22a, but the shape of the movable plate 26c is different. Since the eaves 26g are formed only on the upper side and not on the lower side, the pressing roller 20a directly contacts the upper surface 15 of the lower mold. With this configuration, the lower mold 5 does not have the recess 16, and the first pressing device 21c and the second pressing device 22c can be brought close to the die 41.

<Effects of the press device 1a of the first embodiment>
According to the configuration of the press apparatus 1a described above, the following effects are achieved. As shown in FIG. 7 and the like, the contact portion 20 of the press device 1a is a truncated conical pressing roller 20a. The pressure roller 20a has a lower outer diameter smaller than an upper outer diameter, and the outer peripheral surface is linearly inclined at a predetermined angle θ in the width direction. By being inclined at a predetermined angle θ, the pressing roller 20a can prevent the widthwise end portions 11 of the steel plate material 10 from curling up, and can press the steel plate material 10 so that the widthwise center portion thereof becomes convex upward. Furthermore, since the eaves 26g are formed above and below the pressing roller 20a, vertical movement of the steel plate 10 within the contact length 23 can be restricted. Therefore, when the steel plate material 10 is conveyed, it is possible to reduce conveyance defects caused by the blank portion 8 being caught on the punched pressed steel plate 7. Further, since the pressing roller 20a is rotatable around the shaft 26e, damage due to wear can be reduced even if the end portion 11 of the steel plate material 10 in the width direction comes into contact with the pressing roller 20a.

<Configuration of press device 1b of second embodiment>
Next, with reference to FIGS. 10 to 14, a press apparatus 1b of a second embodiment according to the first aspect of the present invention will be described. As shown in FIG. 14 and the like, the contact portion 20 in the pressing device 2b of the pressing device 1b is a contactor 20b formed at the tip of a movable plate 26b. The contactor 20b is inclined at a predetermined angle θ in a direction in which it falls inward in the width direction as it goes from the lower side to the upper side in the vertical direction in the contact length 23. As shown in FIG. 14, when the widthwise end 11 of the steel plate material 10 is pressed by the contactor 20b, the widthwise end 11 of the steel plate material 10 has a width in the direction of arrow B by the contactor 20b. direction, and is pressed downward in the vertical direction.

As shown in FIG. 14, the movable plate 26b of the movable portion 26 has a contactor 20b at its inner tip in the width direction. The lower end of the contact length 23 is at the height of the upper surface 15 of the lower mold. The contactor 20b has an eave 26g formed on the upper side in the vertical direction. Unlike the press device 1a of the first embodiment shown in FIG. 7, the press device 1b does not need to form a recess 16 in the upper surface 15 of the lower mold. Therefore, as shown in FIG. 11, the pressing device 2b can also be arranged in the region of the die 41 of the lower mold 5. Note that since the widthwise end portion 11 of the steel plate material 10 slides on the contactor 20b, it is desirable to use a carbide material that is less likely to wear. Although FIGS. 12 and 13 describe the first pressing device 21b, the second pressing device 22b also has a similar configuration.

<Effects of the press device 1b of the second embodiment>
According to the configuration of the press device 1b explained above, the following effects are achieved. As shown in FIG. 14, the contact 20b in the pressing device 2b of the pressing device 1b is inclined at a predetermined angle θ in a direction in which it falls inward in the width direction as it goes from the lower side in the vertical direction to the upper side in the contact length 23. The contactor 20b can be tilted by a predetermined angle θ to prevent the ends 11 in the width direction of the steel plate material 10 from curling up, and can be pressed so that the center portion in the width direction becomes convex upward. Moreover, since the eaves 26g are formed above the contactor 20b, and the lower side thereof is at the height of the upper surface 15 of the lower mold, vertical movement of the steel plate material 10 can be restricted within the range of the contact length 23. Furthermore, since the pressing device 2b can be placed in the region of the die 41 of the lower mold 5 within the movement range of the contactor 20b, it can be placed closer to the final press step position P. Therefore, when the steel plate material 10 is conveyed, it is possible to reduce conveyance defects caused by the blank portion 8 being caught on the punched pressed steel plate 7.

<Explanation of pressed steel plate manufacturing method>
Next, a method for manufacturing a pressed steel plate according to a second aspect of the present invention will be explained. The press steel plate manufacturing method is a manufacturing method in which a press apparatus 1 is used to punch out a band-shaped steel plate material 10 that is intermittently conveyed in one conveyance direction to manufacture a press steel plate 7. As already explained, the press device 1 has the following configuration. In order to punch the steel plate material 10 into a predetermined shape, the press device 1 includes an upper die 4 and a lower die 5 that are relatively movable in the vertical direction orthogonal to the conveying direction of the steel plate material 10, and the steel plate material 10. A conveyance device 6 for conveyance is provided. Furthermore, the direction perpendicular to the conveyance direction and the up-down direction is defined as the width direction, and pressing devices 2 are provided that are arranged opposite to each other in the width direction and can approach and separate from the ends 11 of the steel plate material 10 in the width direction.

The press steel plate manufacturing method includes a first step of transporting a predetermined position of the steel plate material 10 to a final press process position P by the transport device 6. Next, as shown in FIG. 5(b) and FIG. 12(b), a second step in which the upper mold 4 is lowered relative to the lower mold 5 and the pressing device 2 is separated from the steel plate material 10. Equipped with Next, as shown in FIGS. 6(a) and 13(a), the upper mold 4 is further lowered relative to the lower mold 5, and after the pressing device 2 is separated from the steel plate material 10, As shown in FIGS. 6(b) and 13(b), a third step is provided in which a pressed steel plate 7 is manufactured by punching out a steel plate material 10. Next, as shown in FIGS. 5(a) and 12(a), the upper mold 4 is raised relative to the lower mold 5, and the pressing device 2 is moved to the end of the steel plate 10 in the width direction. 11 so that the central portion of the steel plate material 10 in the width direction becomes convex upward. The pressed steel sheet manufacturing method is a method of repeatedly performing the first to fourth steps to continuously manufacture the pressed steel sheet 7.

Next, with reference to FIGS. 4 to 6, the steps of the pressed steel plate manufacturing method will be described in detail using the press apparatus 1a as an example. Note that the press apparatus 1b shown in FIGS. 11 to 13 has the same process, so the explanation will be omitted. As shown in FIG. 4, the first step is a step of transporting the portion of the steel plate material 10 that has been punched up to the step before the final press step to the final press step position P.

FIG. 5(a) shows a state in which the steel plate material 10 is transported in the first step. The upper mold 4 is at the top dead center, and the operating cam portion 29 is in a raised state relative to the passive cam portion 26h. At this time, the movable portion 26 is pressed inward in the width direction by the elastic member 28, which is a compression coil spring, in a fourth step to be described later. The steel plate material 10 is transported with the center portion in the width direction convex upward.

FIG. 5(b) shows an intermediate stage in which the upper mold 4 is lowered relative to the lower mold 5 in the second step. The operating cam portion 29 descends, the passive cam portion 26h is acted upon by the operating portion 29a, and the movable portion 26 moves outward in the width direction. At this time, the pressing roller 20a begins to separate from the end portion 11 of the steel plate material 10 in the width direction. At this timing, the lifter 13 of the lift device 9 is raised by the action of the lifter elastic member 12, and pushes the steel plate material 10 upward.

FIG. 6(a) shows a state in which the upper mold 4 has further lowered relative to the lower mold 5 from the state shown in FIG. show. At this time, the steel plate material 10 is lifted by the lifter 13 of the lift device 9, but the raised position is regulated by the eaves 26g of the movable part 26.

FIG. 6(b) shows the state of the third step, in which the punch 37 is inserted into the die 41 and punches out the outer shape of the pressed steel plate 7 at the final press step position P. The base portion 29b of the operating cam portion 29 fits into the operating cam hole 26d of the movable portion 26, and prevents the movable portion 26 from moving in the width direction. At this time, the state in which the pressing roller 20a is spaced apart from the end portion 11 of the steel plate material 10 in the width direction is maintained. Around the final press step position P, the steel plate 10 is in a state along the upper surface 15 of the lower die, and the press steel plate 7 is punched out by the punch 37 and die 41 without distortion in the steel plate 10. The punched pressed steel plate 7 is pushed down below the lower mold upper surface 15 as the punch 37 descends, so that the upper surface of the pressed steel plate 7 is at the same height as the lower mold upper surface 15 in the vertical direction. Or it gets lower. The final pressing step is a step of punching out the outer shape of the pressed steel plate 7. Note that, as shown in FIG. 1, the lower side of the pressed steel plate 7 in the vertical direction is supported by the inner circumferential surface of the die 41 and the squeeze ring 45.

When the third step is completed, the upper mold 4 is raised to the top dead center. As the upper mold 4 rises, the state shown in FIG. 6(b) described above shifts to the state shown in FIG. 5(b), and then becomes the state shown in FIG. 5(a). This step is the fourth step. In the fourth step, the movable portion 26 is pressed inward in the width direction by the elastic member 28, which is a compression coil spring. That is, the pressing roller 20a, which is the contact portion 20, is pressed against the widthwise end portion 11 of the steel plate material 10 by the elastic force of the elastic member 28. As described with reference to FIG. 7, the widthwise end portions 11 of the steel plate material 10 are pressed without being turned up due to the inclination of the contact portion 20, so that the widthwise center portion becomes convex upward. The first step is performed in a state where the central portion of the steel plate material 10 in the width direction is made convex by the fourth step. That is, in a state where the fourth step has been performed, the process moves to the first step of transporting the steel plate material 10. The first to fourth steps described above are repeated.

<Effects of pressed steel sheet manufacturing method>
According to the press steel plate manufacturing method explained above, the following effects are achieved. As shown in FIG. 6 and the like, in the second step of the pressed steel plate manufacturing method, the upper die 4 is lowered relative to the lower die 5 to separate the contact portion 20 from the steel plate material 10. Therefore, the pressed steel plate manufacturing method can punch out the pressed steel plate 7 in a state where the steel plate material 10 is free from distortion.

Further, as shown in FIG. 5 etc., in the fourth step, the upper mold 4 is raised relative to the lower mold 5 and positioned at the top dead center, so that the contact portion 20 is 4, the ends 11 of the steel plate material 10 in the width direction can be pressed. The center portion of the steel plate material 10 in the width direction becomes convex upward due to the pressure of the contact portion 20 . Therefore, in the pressed steel plate manufacturing method, when the steel plate material 10 is conveyed, it is possible to reduce conveyance defects caused by the blank portion 8 being caught by the punched press steel plate 7.

<Detailed explanation and effects of pressed steel plate manufacturing method>
Furthermore, the second step and the fourth step will be explained in detail. The pressing device 2 used in the pressed steel plate manufacturing method may have the following configuration. That is, as shown in FIG. 5 etc., the pressing device 2 includes a movable part 26 that is movable in the width direction, a guide part 27 that guides the movement of the movable part 26, and an elastic member that presses the movable part 26 in the width direction. 28, a receiving part 30 for receiving the elastic member 28, an operating cam part 29 for operating the movable part 26, and a contact part 20 capable of contacting the widthwise end part 11 of the steel plate material 10.

As shown in FIG. 5 and the like, the movable part 26, the guide part 27, the elastic member 28, and the receiving part 30 are provided in the lower mold 5, and the operating cam part 29 is provided in the upper mold 4. As shown in FIGS. 5(b) and 12(b), in the second step, the upper mold 4 is lowered relative to the lower mold 5, so that the operating cam part 29 moves the movable part 26. This includes a step of activating and separating the contact portion 20 from the steel plate material 10. Further, as shown in FIGS. 5(a) and 12(a), in the fourth step, the upper mold 4 is raised relative to the lower mold 5, so that the actuating cam portion 29 is raised. , the movable part 26 is pressed by the elastic member 28 to move, and the contact part 20 presses the end 11 of the steel plate material 10 in the width direction.

As explained above, according to the second step and the fourth step, the following effects are achieved. As shown in FIG. 6 etc., in the second step, by lowering the upper mold 4 relative to the lower mold 5, the operating cam part 29 operates the movable part 26 to move the contact part 20 to the steel plate. separated from the material 10. Therefore, in the second step, the contact portion 20 can be brought into contact with and separated from the end portion 11 of the steel plate material 10 in the width direction in conjunction with the upper mold 4 .

Further, as shown in FIG. 5 etc., in the fourth step, by raising the upper mold 4 relative to the lower mold 5, the operating cam part 29 is separated from the movable part 26, and the contact part 20 presses the end portion 11 of the steel plate material 10 in the width direction. Since the contact portion 20 can press the steel plate material 10 from the width direction in conjunction with the movement of the upper mold 4 to rise, the central portion in the width direction can be made convex more reliably. Therefore, when the steel plate material 10 is conveyed, it is possible to reduce conveyance defects caused by the blank portion 8 being caught on the punched pressed steel plate 7.

1, 1a, 1b Press devices 2, 2a, 2b Press devices 4, 4a, 4b Upper molds 5, 5a, 5b Lower mold 6 Conveying device 7 Press steel plate 10 Steel plate material 11 End portion 20 Contact portion 20a Press roller 20b Contact Children 21, 21a, 21b First pressing device 22, 22a, 22b Second pressing device 23 Contact length 26 Movable part 27 Guide part 28 Elastic member 29 Operating cam part 31 First guide part 32 Second guide part 37 Punch 41 Die L1 , L2 Distance P Final press process position θ Predetermined angle

Claims (5)

A press device in which a pressed steel plate is formed by punching a band-shaped steel plate material that is intermittently conveyed in one conveyance direction into a predetermined shape,
an upper mold and a lower mold that are relatively movable in an up-down direction perpendicular to the conveyance direction in order to punch the steel plate material into a predetermined shape;
a conveying device for conveying the steel plate material;
A direction perpendicular to the conveyance direction and the up-down direction is the width direction,
Pressing devices arranged in pairs facing each other in the width direction and capable of approaching and separating from the ends of the steel plate material in the width direction are provided,
In the vertical direction, the top dead center is the position where the upper mold is most spaced apart from the lower mold,
In the vertical direction, a position where the steel plate material is punched by a punch in the upper mold and a die in the lower mold is defined as a punching position,
The pressing device includes a contact portion capable of contacting an end portion of the steel plate material in the width direction,
The contact portion has a predetermined contact length in the up-down direction, and is inclined linearly with respect to the width direction between the contact lengths,
When the pair of pressing devices face each other in the width direction,
The distance in the width direction between one of the contact parts and the other of the contact parts is
In the contact length, a lower distance is longer than an upper distance in the vertical direction,
The lower position of the contact portion is formed to match the upper surface position of the lower mold,
A part of the upper surface of the lower mold or a member matching the height of the upper surface of the lower mold is formed below the contact part,
The pressing device is
When the upper mold and the lower mold are in the punching position, they are separated from the steel plate material,
When the upper die is at the top dead center, the contact portion presses the end of the steel plate material inward in the width direction and downward in the vertical direction, and the steel plate material A press device in which the steel plate material is conveyed with its widthwise end portions being pressed so that its widthwise center portion is convex upward. The pressing device is
a movable part that is movable in the width direction;
a guide section that guides movement of the movable section;
an elastic member that presses the movable part in the width direction;
a receiving portion for receiving the elastic member;
comprising an operating cam part that operates the movable part,
The movable part, the guide part, the elastic member, and the receiving part are provided in the lower mold,
The operating cam part is provided in the upper mold,
The contact portion is formed at an inner end in the width direction of the movable portion,
When the upper mold is at the top dead center,
The movable part is pressed by the elastic member, and the contact part presses the widthwise end of the steel plate material,
When the upper mold is lowered relative to the lower mold,
The movable part is moved by the actuating cam part so that the contact part moves outward in the width direction,
The press apparatus according to claim 1 , wherein the contact portion is spaced apart from the steel plate material when the upper mold and the lower mold are in the punching position. The contact portion is a pressure roller,
The pressure roller is shaped like a truncated cone and has a lower outer diameter smaller than an upper outer diameter,
The outer peripheral surface is linearly inclined at a predetermined angle in the width direction,
When the end portion of the steel plate material in the width direction is pressed by the pressing roller,
The press device according to claim 2 , wherein the end portion of the steel plate material in the width direction is pressed by the pressing roller toward the inner side in the width direction and the lower side in the vertical direction. The contact part is a contact integrally formed at the tip of the movable part,
The contact is inclined at a predetermined angle in a direction in which it falls inward in the width direction as it goes from the lower side to the upper side in the vertical direction,
When the end portion of the steel plate material in the width direction is pressed by the contactor,
The press device according to claim 2 , wherein the end portion of the steel plate material in the width direction is pressed by the contactor toward the inner side in the width direction and the lower side in the vertical direction. A method for manufacturing a pressed steel plate, in which a pressed steel plate is manufactured by punching and forming a band-shaped steel plate material that is intermittently conveyed in one conveyance direction using a press device, the method comprising:
The press device includes:
an upper mold and a lower mold that are relatively movable in an up and down direction orthogonal to the conveying direction of the steel sheet in order to punch the steel sheet into a predetermined shape;
a conveying device for conveying the steel plate material;
A direction perpendicular to the conveyance direction and the up-down direction is defined as the width direction, and a pressing device is provided opposite to the width direction and capable of approaching and separating from the ends of the steel plate material in the width direction,
The pressing device includes a contact portion capable of contacting an end portion of the steel plate material in the width direction,
The contact portion has a predetermined contact length in the up-down direction, and is inclined linearly with respect to the width direction between the contact lengths,
When the pair of pressing devices face each other in the width direction,
The distance in the width direction between one of the contact parts and the other of the contact parts is
In the contact length, a lower distance is longer than an upper distance in the vertical direction,
The lower position of the contact portion is formed to match the upper surface position of the lower mold,
A part of the upper surface of the lower mold or a member matching the height of the upper surface of the lower mold is formed below the contact part,
a first step of transporting a predetermined position of the steel plate material to a final press step position by the transport device;
a second step of lowering the upper mold relative to the lower mold and separating the pressing device from the steel plate;
Further, a third step of lowering the upper die relative to the lower die and punching out the steel plate after the pressing device is separated from the steel plate to produce a pressed steel plate;
The upper mold is raised relative to the lower mold, and the contact portion of the pressing device presses the widthwise end of the steel plate material in the widthwise inner direction and in the vertical direction. a fourth step of pressing downward so that the center portion of the steel plate material in the width direction becomes convex upward;
The first step is performed in a state where the central portion of the steel plate material in the width direction is convex in the fourth step,
A press steel plate manufacturing method in which the steps from the first step to the fourth step are repeatedly performed.

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