Press working device and press working method

Abstract

To downsize a device and achieve both of downsizing of the device and improvement of the quality.SOLUTION: A press processing device 1 comprises: a frame 2 which is fixed with a plurality of actuators 4, 4, 4...; and a die unit 6. The die unit 6 comprises: a die set 20; a placement table 21 which is arranged in the die set 20; and a plurality of dies 22, 24 and a plurality of punches 26, 28, 30, 32, 34. The placement table 21 has a placement surface 21a on which a material BL can be placed. The dies 22, 24 and the punches 26, 28, 30, 32, 34 are connected with respective actuators 4, 4, 4.... With the press processing device 1, a plurality of pieces of folding processing can be performed to the material BL in a state where the material BL is placed on the placement surface 21a, and the device can thus be downsized.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a press working apparatus and a press working method capable of forming a finished product from a plate-shaped material. [Background technology]

[0002] Japanese Patent Laid-Open Publication No. 11-33645 (Patent Document 1) describes a press processing device that has a number of dies arranged in sequence from the first process to the final process, and where one die closing and opening constitutes one cycle, automatically transporting the objects to be processed in all processes (on all dies) in each cycle to the next process (the die arranged one step later), thereby sequentially applying press processing to the objects to be processed and forming a finished product.

[0003] The press working apparatus can improve productivity compared to single-step working in which press working is performed one-off for each step. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-33645 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the press processing apparatus described in the above publication, since multiple dies are clamped at the same time to perform press processing, a larger pressurizing force is required than in single-step processing, and the pressurizing unit becomes larger. In addition, since multiple dies need to be arranged in order of processing, not only is a space required to arrange the multiple dies in the conveying direction of the workpiece, but a conveying mechanism is also required to convey the workpiece to the next process in sequence. Thus, the press processing apparatus described in the above publication still has room for improvement in terms of making the device more compact.

[0006] The present invention has been made in view of the above, and has an object to provide a technique that contributes to making the device more compact. Another object of the present invention is to provide a technique that contributes to achieving both a more compact device and improved quality. [Means for solving the problem]

[0007] According to a preferred embodiment of the press working device of the present invention, a press working device capable of forming a finished product from a plate-shaped material is configured. The press working device includes a die base, a mounting portion fixedly disposed on the die base, first and second punches slidably disposed on the die base, The third punch, first and second drive units connected to the first and second punches; a third drive section connected to the third punch; The mounting portion has a mounting surface on which a material can be mounted. The first punch is capable of performing a first press working on the material. The second punch is capable of performing a second press working on the first pressed material, which is a material placed on the mounting surface and has been subjected to the first press working. The third punch is capable of performing a third press process on the second pressed material that is placed on the placement surface and has been subjected to the second press process. The first and second driving units are capable of driving the first and second punches. The third drive unit is capable of driving the third punch. do. The mounting surface is capable of mounting the material with the second portion of the material excluding the first portion of the material protruding. The second portion has a third portion protruding in at least a first direction of a first extension direction, which is one of the extension directions of the material, and a fourth portion protruding in a second direction of a second orthogonal direction, which is orthogonal to both a first orthogonal direction perpendicular to an imaginary plane including the mounting surface and the first extension direction. The fourth portion has a fifth portion extending along the first portion and a sixth portion extending along the third portion. The first punch is disposed on the mold base so as to be reciprocally slidable in the first orthogonal direction so as to bend the third portion in a third direction of the first orthogonal direction. The second punch is disposed on the mold base so as to be reciprocally slidable in the first orthogonal direction so as to bend at least a part of the fifth portion and the sixth portion in a third direction opposite to the third direction and the first direction, or to bend at least a part of the fifth portion in the third direction. The third punch is arranged on the mold base so as to be able to slide back and forth in the first extension direction so as to be able to fold the remainder of the fifth portion in the third direction and to be able to fold the sixth portion in the fourth direction, or so as to be able to fold the remainder of the sixth portion in the fourth direction. Here, in the present invention, "connected to the first and second punches" preferably includes an embodiment in which the first and second driving units are directly connected to the first and second punches, as well as an embodiment in which the first and second driving units are indirectly connected to the first and second punches. In addition, in the present invention, "connected to the third punch" preferably includes an embodiment in which the third drive unit is directly connected to the third punch, as well as an embodiment in which the third drive unit is indirectly connected to the third punch.

[0008] According to the present invention, the first and second press processes can be performed while the material is placed on the placement surface. That is, when the dies for the first and second press processes are arranged in order of processing and the first and second press processes are performed, it is not necessary to transport the material from the die for the first press process to the die for the second press process, so that space can be saved in the transport direction of the material. In addition, since the first and second punches are driven by separate drive units (first and second drive units), it is only necessary for the first and second drive units to have the pressing force required for each of the first and second press processes. This allows the drive units to be made compact. As a result, the press processing device can be made compact. In addition, the complex press working of folding a plate-shaped material into an L-shape and then folding the L-shaped edge of the L-shaped material into an L-shape again can be achieved while making the press working device more compact. Moreover, since the process of folding the L-shaped edge into an L-shape is performed in two steps, the second press working using the second punch and the third press working using the third punch, it is possible to suppress the occurrence of "wrinkles" caused by the compressive stress generated in the edge when the edge is folded into an L-shape, compared to when the press working of folding the edge into an L-shape is performed in one step. This allows for improved quality.

[0009] According to a further embodiment of the press working apparatus of the present invention, the press working apparatus further includes an apparatus frame. The die base is removably disposed on the apparatus frame. The first and second punches are removably attached to the apparatus frame via the die base. The first and second drive units are fixed to the apparatus frame.

[0010] According to this embodiment, by preparing a die base and a first and second punch for each type, it is possible to press a plurality of different types of materials by simply replacing the die base and the first and second punches. This makes it unnecessary to arrange a plurality of types of press processing devices, thereby saving space.

[0013] In a further embodiment of the press working apparatus according to the present invention, in which the die base is removably disposed on the equipment frame and further including a third punch and a third drive unit, the third punch is removably attached to the equipment frame via the die base, and the third drive unit is configured to be fixed to the equipment frame.

[0014] According to this embodiment, the third punchBy preparing a third punch and a die base for each type, it is possible to press a number of different types of materials by simply replacing the third punch and the die base. This eliminates the need to arrange a number of different types of press processing equipment, thereby saving space.

[0015] According to a further embodiment of the press working device of the present invention, the press working device further includes a die arranged on the die base so as to be reciprocally slidable in the first orthogonal direction, and a fourth drive unit connected to the die so as to be able to drive the die. The die has a first surface, a second surface, and a third surface. The first surface is arranged facing the mounting surface so as to be able to abut against the first portion. The second surface is arranged at a position facing the first punch during the first press working, and the third portion can abut against the second surface. The third surface is arranged at a position facing the second and third punches during the second and third press workings, and the fourth portion can abut against the third surface. Here, when the die base is arranged removably on the device frame, the fourth drive unit can be configured to be fixed to the device frame. In the present invention, "connected to the die" preferably includes a mode in which the fourth drive unit is directly connected to the die, as well as a mode in which the fourth drive unit is indirectly connected to the die.

[0016] According to this embodiment, the first, second, and third punches are slid while the material is sandwiched between the first surface and the mounting surface of the die to form a finished product from the material, so that the material can be stably pressed, thereby improving the quality.

[0017] According to a preferred embodiment of the press working method of the present invention, there is provided a press working method capable of forming a finished product from a plate-shaped material using a press working device including a die base, a mounting part fixedly disposed on the die base, first, second and third punches slidably disposed on the die base, and first, second and third drive parts connected to the first, second and third punches. The mounting part has a mounting surface on which the material can be placed. The first punch is capable of performing a first press working on the material. The second punch is capable of performing a second press working on the material placed on the mounting surface, which is the first pressed material that has been subjected to the first press working. The third punch is capable of performing a third press working on the material placed on the mounting surface, which is the second pressed material that has been subjected to the second press working. The first, second and third drive parts are capable of driving the first and second punches. The press working method includes: (a) placing the material on the placement surface in a state in which the second portion excluding the first portion of the material protrudes; (b) driving a first driving unit to operate a first punch to bend a third portion of the second portion protruding in at least a first direction in a first extension direction, which is one of the extension directions of the material, in a third direction in a first orthogonal direction that is orthogonal to an imaginary plane including the placement surface; and (c) driving a second driving unit to operate a second punch to bend a third portion of the second portion protruding in at least a second direction in a second orthogonal direction that is orthogonal to both the first orthogonal direction and the first extension direction. (d) driving the third driving unit to actuate the third punch to fold the remainder of the fifth portion in the third direction and the sixth portion in the fourth direction, or to fold the remainder of the sixth portion in the fourth direction, the sixth portion being a fourth portion that juts out toward the first portion and extends along the first portion, in a third direction, or to fold the fifth portion in the third direction and at least a portion of the sixth portion that is the fourth portion and extends along the third portion, in a fourth direction opposite to the first direction, and thereby forming a finished product.

[0018] According to the present invention, the first and second press processes can be performed while the material is placed on the placement surface. That is, when the dies for the first and second press processes are arranged in order of processing and the first and second press processes are performed, it is not necessary to transport the material from the die for the first press process to the die for the second press process, so that space can be saved in the transport direction of the material. In addition, since the first and second punches are driven by separate drive units (first and second drive units), the first and second drive units only need to have the necessary pressing force for each of the first and second press processes, so that the drive units can be made compact. This allows the press processing device to be made compact. Furthermore, it is possible to realize a complex press process in which a plate-shaped material is bent into an L shape, and then the L-shaped edge of the L-shaped material is further bent into an L shape, while making the press processing device compact. Furthermore, since the process of folding the L-shaped edge into an L-shape is performed in two steps, the second press process using the second punch and the third press process using the third punch, it is possible to suppress the occurrence of "wrinkles" caused by the compressive stress generated in the edge when it is folded into an L-shape, compared to when the press process for folding the edge into an L-shape is performed in one step, thereby improving quality. Effect of the Invention

[0019] According to the present invention, it is possible to make the device more compact. Also, according to the present invention, it is possible to achieve both a more compact device and improved quality. [Brief description of the drawings]

[0020] [Figure 1] 1 is a schematic diagram showing an outline of the configuration of a press working device 1 according to an embodiment of the present invention. [Diagram 2] 2 is a schematic diagram showing the outline of the configuration of a mold unit 6. FIG. [Diagram 3] 2 is a schematic diagram showing the outline of the configuration of a mold unit 6. FIG. [Figure 4] FIG. 2 is an external view showing the appearance of the material BL. [Diagram 5] FIG. 1 is an external view showing the appearance of the finished product FP. [Figure 6] 2 is an explanatory diagram showing the state of the material BL placed on the placement surface 21a. FIG. [Figure 7] 13 is an explanatory diagram showing the positional relationship between the material BL and the punches 26, 28, 30, 32, and 34 when the material BL is placed on the placement surface 21a, as viewed from above. [Figure 8] 1 is an explanatory diagram showing a state in which the material BL is pressed onto the placement surface 21a by the die 22. FIG. [Figure 9] 13 is an explanatory diagram showing how the second portion BL2 is bent by a punch 26. FIG. [Figure 10] FIG. 13 is an external view showing the material BL in which the second portion BL2 is folded. [Figure 11] FIG. 2 is an explanatory diagram showing a state in which a die 24 is set. [Figure 12] 13 is an explanatory diagram showing how the tongue piece Tp is bent by a punch 28. FIG. [Figure 13] 1 is an external view showing the material BL with the tongue piece Tp bent. FIG. [Figure 14] 13 is an explanatory diagram showing a state in which the punch 28 has returned to its original position after the tongue piece Tp has been bent. FIG. [Figure 15] FIG. 2 is an explanatory diagram showing a state in which the punch 30 is raised. [Figure 16] FIG. 13 is an explanatory diagram showing a state immediately before the punch 32 is raised. [Figure 17] FIG. 13 is an explanatory diagram showing a state in which the punch 32 is raised. [Figure 18] 13 is an explanatory diagram showing how a part of the fourth portion BL4, the fifth portion BL31, and the sixth portion BL32 is folded by punches 30 and 32. FIG. [Figure 19] FIG. 13 is an external view showing the material BL in which a fourth portion BL4, a fifth portion BL31, and a sixth portion BL32 are partially folded. [Figure 20] FIG. 13 is an explanatory diagram showing a state in which the bending of the fourth portion BL4 is completed. [Figure 21]13 is an explanatory diagram showing a state in which the fifth portion BL31 and the sixth portion BL32 have been partially folded. FIG. [Figure 22] 13 is an explanatory diagram showing how the remaining part of the sixth portion BL32 is bent by a punch 34. FIG. [Figure 23] 13 is an explanatory diagram showing a state in which the remaining part of the sixth portion BL32 has been completely folded. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Next, the best mode for carrying out the present invention will be described with reference to examples. EXAMPLES

[0022] As shown in Fig. 1, the press working device 1 according to this embodiment includes a frame 2, a plurality of actuators 4, 4, 4, ... supported by the frame 2, and a die unit 6 detachably attached to the frame 2, and forms a finished product FP shown in Fig. 5 from a plate-shaped material BL shown in Fig. 4. In this embodiment, for convenience of explanation, the front direction of the paper in Fig. 1 is defined as "front side" or "forward", the back direction of the paper in Fig. 1 is defined as "rear side" or "rear", the upper direction in Fig. 1 is defined as "upper side" or "upper", the lower direction in Fig. 1 is defined as "lower side" or "lower", the left direction in Fig. 1 is defined as "left side" or "left side", and the right direction in Fig. 1 is defined as "right side" or "right side".

[0023] As shown in Fig. 1, the frame 2 has an upper wall 12, a lower wall 14, and a left wall 16 and a right wall 18 connecting the upper wall 12 and the lower wall 14. The frame 2 has a mold unit arrangement area DA in the center that opens in the front-rear direction. The upper wall 12, the lower wall 14, the left wall 16, and the right wall 18 have openings that penetrate to the mold unit arrangement area DA (only the opening 12a of the upper wall 12 is shown in Fig. 1). The lower wall 14 has a shape that protrudes forward. The frame 2 is an example of an embodiment corresponding to the "apparatus frame" in the present invention.

[0024] In this embodiment, the actuators 4, 4, 4,... are configured to include a cylinder (not shown) and rods R, R, R,... (shown in Fig. 2 or Fig. 3) supported in the cylinder so as to be capable of rising and falling, and to use a hydraulic cylinder in which the rods R, R, R,... rise and fall by hydraulic pressure. The actuators 4, 4, 4,... are arranged on the upper wall 12, the lower wall 14, the left wall 16 and the right wall 18 so that the rods R, R, R,... can pass through the openings in the upper wall 12, the lower wall 14, the left wall 16 and the right wall 18.

[0025] As shown in Figs. 1 to 3, the die unit 6 has a die set 20, and dies 22, 24 (shown only in Fig. 2) and punches 26, 28, 30, 32, 34 (shown only in Fig. 2 or Fig. 3) slidably supported by the die set 20. As shown in Figs. 2 and 3, the die set 20 has a press working area PA in the center where press working is performed. A mounting table 21 having a mounting surface 21a on which a material BL can be placed is disposed in the press working area PA. The die set 20 is an example of an embodiment corresponding to the "die base" in the present invention. The mounting table 21 is an example of an embodiment corresponding to the "mounting portion" in the present invention.

[0026] The die 22 is connected to the rod R of the actuator 4, and can be reciprocated and slid in the vertical direction (vertical direction in FIG. 2) by the actuator 4. The die 22 has a pressing surface 22a (see FIG. 2), a receiving surface 22b (see FIG. 8), and receiving surfaces 22c and 22d (see FIG. 18). As shown in FIG. 2, the pressing surface 22a is disposed opposite the mounting surface 21a, and the die 22 is lowered (downward in FIG. 2) by the actuator 4, so that the pressing surface 22a comes into contact with the material BL, specifically, a first portion BL1 described later. As a result, the material BL (first portion BL1) is sandwiched between the pressing surface 22a and the mounting surface 21a. As shown in FIG. 8 and FIG. 9, the receiving surface 22b is disposed in a position opposite the punch 26 when a second portion BL2 described later of the material BL is bent. As a result, the punch 26 is raised (slid upward in Figs. 2, 8 and 9) by the actuator 4, so that the second portion BL2 of the material BL to be folded upward (upward in Figs. 2, 8 and 9) comes into contact with the receiving surface 22b. Furthermore, as shown in Fig. 18, the receiving surfaces 22c and 22d are disposed in positions facing the punches 30 and 32 when bending a third portion BL3 and a fourth portion BL4 of the material BL, which will be described later. As a result, the punches 30 and 32 are raised (slid upward in Fig. 18) by the actuator 4, so that the third and fourth portions BL3 and BL4 to be folded upward (upward in Figs. 5 and 18) come into contact with the receiving surfaces 22c and 22d. The pressing surface 22a corresponds to the "first surface" in the present invention, and the receiving surfaces 22b and 22c are examples of an embodiment corresponding to the "second surface" and "third surface" in the present invention, respectively. The actuator 4 connected to the die 22 is one example of a feature that corresponds to a "fourth driving unit" of this invention.

[0027] As shown in FIG. 2, the die 24 is connected to the rod R of the actuator 4, and can be reciprocated and slid in the vertical direction (vertical direction in FIG. 2) by the actuator 4 at a predetermined inclination angle. Also, the die 24 has a receiving surface 24a and a receiving surface 24b (see also FIG. 18) as shown in FIG. 11. As shown in FIG. 11, the receiving surface 24a is disposed at a position facing the receiving surface 22b of the die 22 when bending the tongue piece Tp of the material BL (see FIG. 5). When the actuator 4 lowers the die 24 (sliding diagonally downward to the left in FIG. 2), the receiving surface 24a comes into contact with the second portion BL2 of the material BL bent upward (upward in FIGS. 2, 8, and 9). As a result, the material BL (second portion BL2) is sandwiched between the receiving surface 22b and the receiving surface 24a. As shown in FIG. 18, the receiving surface 24b is a surface that comes into contact with a tongue piece Tp that is bent in a first direction (to the right in FIGS. 13 and 14) described below.

[0028] As shown in Fig. 2, the punch 26 is connected to the rod R of the actuator 4 via a connecting piece CP1, and can be slid back and forth in the vertical direction (vertical direction in Fig. 2) by the actuator 4. As shown in Fig. 9, the punch 26 is raised (slid upward in Fig. 9) by the actuator 4, so that it comes into contact with the second portion BL2 of the material BL and can bend the second portion BL2 until the second portion BL2 comes into contact with the receiving surface 22b. The punch 26 is an example of a configuration corresponding to the "first punch" in the present invention. The actuator 4 connected to the punch 26 is an example of a configuration corresponding to the "first driving unit" in the present invention.

[0029] 12, the punch 28 can be connected to the rod R of the actuator 4 via a connection piece CP2, and can be reciprocated in the left-right direction (left-right direction in FIG. 12) by the actuator 4. As shown in FIG. 12, the punch 28 can be slid rightward (rightward in FIG. 12) by the actuator 4 to come into contact with the tongue piece Tp of the material BL and bend the tongue piece Tp (see FIG. 5) until the tongue piece Tp comes into contact with the die 24. That is, the punch 28 can bend the tongue piece Tp in a first direction (rightward in FIG. 12) described below.

[0030] 2 and 3, the punches 30 and 32 are connected to rods R and R of the actuators 4 and 4, respectively, and can be reciprocated and slid in the vertical direction (vertical direction in FIGS. 2 and 3) by the actuators 4 and 4. As shown in FIG. 18, the punches 30 and 32 are raised (slid upward in FIGS. 2, 3 and 18) by the actuators 4 and 4, respectively, to come into contact with parts of a fourth portion BL4, a fifth portion BL31, and a sixth portion BL32, which will be described later, of the material BL, and can bend parts of the fourth portion BL4, the fifth portion BL31, and the sixth portion BL32 until the parts of the fourth portion BL4, the fifth portion BL31, and the sixth portion BL32 come into contact with receiving surfaces 22c and 22d of the die 22. That is, punches 30, 32 are capable of bending a seventh portion BL41 and a fifth portion BL31, described later, of fourth portion BL4 upward (upward in Figs. 5 and 18), and are capable of bending an eighth portion BL42 and a sixth portion BL32, described later, of fourth portion BL4 to the left (toward the left in Fig. 5 and toward the front of the paper in Fig. 18). Punches 32, 34 correspond to the "second punch" and "third punch" of the present invention, respectively, and actuators 4, 4 connected to punches 32, 34 are an example of an embodiment corresponding to the "second drive unit" and "third drive unit" of the present invention, respectively.

[0031] As shown in Fig. 3, the punch 34 is connected to the rod R of the actuator 4, and can be slid back and forth in the left-right direction (left-right direction in Fig. 3) by the actuator 4. As shown in Fig. 22, the punch 34 is slid rightward (rightward in Fig. 22) by the actuator 4, whereby the punch 34 comes into contact with a sixth portion BL32 (described later) of the material BL, and can bend the sixth portion BL32 until the sixth portion BL32 comes into contact with the receiving surface 22c of the die 22 (see Figs. 5, 18, and 23). That is, the punch 34 can bend the sixth portion BL32 leftward (leftward in Fig. 5, toward the front of the paper in Fig. 18, and rightward in Fig. 23).

[0032] As shown in Fig. 6, the mounting surface 21a of the mounting table 21 is configured so that the material BL can be placed thereon in a state in which the second portion BL2, the third portion BL3, and the fourth portion BL4 of the material BL, excluding the first portion BL1, protrude. The second portion BL2 is a portion of the material BL that protrudes in a first direction (upward in Fig. 6) in the longitudinal direction (upward and downward in Fig. 6), which is one of the extending directions of the material BL. The third portion BL3 is a portion of the material BL that protrudes in a second direction (leftward in FIG. 6) in a direction (left-right direction in FIG. 6) perpendicular to the longitudinal direction of the material BL (up-down direction in FIG. 6). The third portion BL3 has a fifth portion BL31 extending along the first portion BL1, and a sixth portion BL32 extending along the second portion BL2. In other words, the third portion BL3 can be said to be an edge portion of the material BL that is disposed in the first direction, and extends over the entire longitudinal direction of the material BL. Furthermore, the fourth portion BL4is a portion of the material BL that protrudes in a third direction (rightward in FIG. 6) in the orthogonal direction of the material BL (left-right direction in FIG. 6). The fourth portion BL4 has a seventh portion BL41 extending along the first portion BL1 and an eighth portion BL42 extending along the third portion BL3. In other words, the fourth portion BL4 can be said to be an edge portion of the material BL that is arranged in the third direction and extends from the first portion BL1 to partway through the second portion BL2. The second part BL2 corresponds to the "second part" and "third part" in the present invention, the third part BL3 corresponds to the "second part" and "fourth part" in the present invention, the fifth part BL31 corresponds to the "second part", "fourth part", and "fifth part" in the present invention, the sixth part BL32 corresponds to the "second part", "fourth part", and "sixth part" in the present invention, and the fourth part BL4, the seventh part BL41, and the eighth part BL42 are each examples of an implementation configuration corresponding to the "second part" in the present invention. In addition, the longitudinal direction of the material BL corresponds to the "first extension direction" in the present invention, the first direction (upward in Figure 6) corresponds to the "first direction" in the present invention, the vertical direction of the press processing apparatus 1 (vertical direction in Figure 1) corresponds to the "first orthogonal direction" in the present invention, the orthogonal direction perpendicular to the longitudinal direction of the material BL (left-right direction in Figure 6) corresponds to the "second orthogonal direction" in the present invention, and the second direction (leftward in Figure 6) is an example of an implementation configuration corresponding to the "second direction" in the present invention.

[0033] 7 is an explanatory diagram seen from above of the positional relationship between the material BL and the punches 26, 28, 30, 32, and 34 when the material BL is placed on the placement surface 21a. The punch 26 is disposed below the second portion BL2, the punch 28 is disposed above the seventh portion BL41 in a position facing the tongue piece Tp when the second portion BL2 is folded, the punch 30 is disposed below the fourth portion BL4, the punch 32 is disposed below the fifth portion BL31 with a portion of it extending below the sixth portion BL32, and the punch 34 is disposed in a position facing the sixth portion 32 when the second portion BL2 is folded.

[0034] The die unit 6 thus constructed is temporarily placed on the upper surface of the protruding portion of the bottom wall 14 (see FIG. 1), and then moved backward and set in an appropriate position on the frame 2. By configuring the die unit 6 to be removable from the frame 2 in this manner, it is possible to press-work a plurality of different types of material BL having different shapes simply by preparing a die for each type and replacing the die, eliminating the need to arrange a plurality of types of press working devices 1. This makes it possible to save space.

[0035] Next, the operation of the press processing device 1 according to this embodiment configured as described above, particularly the operation when forming the finished product FP from the material BL, will be described. First, as shown in Figures 2, 3 and 6, the material BL is set on the mounting surface 21a of the mounting table 21. At this time, the material BL is positioned at a predetermined position on the mounting surface 21a.

[0036] When the setting of the material BL on the placement surface 21a is completed, the press work start switch of the press work device 1 is turned on. This starts driving the actuators 4, 4, 4, .... First, as shown in Fig. 8, the actuator 4 lowers (slides downward in Fig. 8) the die 22 until the pressing surface 22a abuts against the material BL (first portion BL1). As a result, the first portion BL1 of the material BL is clamped between the placement surface 21a and the pressing surface 22a.

[0037] 9, the punch 26 is raised (slid upward in FIG. 9) by the actuator 4. As a result, the second portion BL2 of the material BL is bent upward (upward in FIG. 9) until it abuts against the receiving surface 22b (see FIG. 10). Furthermore, in this state, as shown in FIG. 11, the actuator 4 lowers the die 24 (sliding downward to the left in FIG. 11) until the receiving surface 24a abuts against the bent second portion BL2. In this state, as shown in FIG. 12, the actuator 4 slides the punch 28 to the right (rightward in FIG. 12). As a result, the tongue piece Tp of the material BL is bent in the first direction (rightward in FIG. 13 and FIG. 14) as shown in FIG. 13. At this time, the tongue piece Tp abuts against the receiving surface 24b of the die 24 as shown in FIG. 18. The process of bending the second portion BL2 of the blank BL upward (upward in FIG. 9) by the punch 26 corresponds to the "first press process" in the present invention, and the blank BL with the second portion BL2 bent upward (upward in FIG. 9) is an example of an embodiment corresponding to the "first pressed blank" in the present invention. Also, the upward direction (upward in FIG. 9) is an example of an embodiment corresponding to the "third direction" in the present invention.

[0038] When the press working for bending the tongue piece Tp in the first direction is thus performed on the material BL by the punch 28, the punch 28 is then slid leftward (leftward in FIG. 14) by the actuator 4 to return to its original position, as shown in FIG 14. Then, as shown in FIG 15, the punch 30 is raised (slid upward in FIG. 15) by the actuator 4, and the punch 32 is raised (slid upward in FIG. 16 and FIG. 17) by the actuator 4 from the position (state) shown in FIG 16 to the position (state) shown in FIG 17. As a result, a part of the third portion BL3 of the material BL and the fourth portion BL4 of the material BL are bent, as shown in FIG 18. More specifically, as the punch 30 rises (slides upward in FIG. 15), the seventh portion BL41 of the fourth portion BL4 is bent upward (upward in FIG. 18), and the eighth portion BL42 of the fourth portion BL4 is bent leftward (toward the left in FIG. 5 and toward the front of the paper in FIG. 18). As the punch 32 rises (slides upward in FIG. 15), the fifth portion BL31 of the third portion BL3 is bent upward (upward in FIG. 18), and a part of the sixth portion BL32 of the third portion BL3 is bent leftward (toward the left in FIG. 5 and toward the front of the paper in FIG. 18) (see FIG. 19). At this time, the fourth portion BL4, the fifth portion BL31, and parts of the sixth portion BL32 are abutted against the receiving surfaces 22c and 22d of the die 22. The process of bending the fifth portion BL31 of the third portion BL3 upward (upward in Figure 18) using punch 32 and bending part of the sixth portion BL32 of the third portion BL3 to the left (toward the left in Figure 5 and toward the front of the paper in Figure 18) corresponds to the ``second press process'' in the present invention, and the material BL in which the fifth portion BL31 of the third portion BL3 is folded upward (upward in Figure 18) and part of the sixth portion BL32 of the third portion BL3 is folded to the left (toward the left in Figure 5 and toward the front of the paper in Figure 18) is an example of an implementation configuration that corresponds to the ``second pressed material'' in the present invention.

[0039] Then, when the punches 30, 32 have completed the bending process of the fourth portion BL4, the fifth portion BL31, and a part of the sixth portion BL32, the actuators 4, 4 lower the punches 30, 32 (slide downward in Figs. 20 and 21) as shown in Figs. 20 and 21, and at the same time, the actuator 4 slides the punch 34 to the right (to the right in Fig. 22) as shown in Fig. 22. This causes the remaining portion of the sixth portion BL32 of the third portion BL3 to be folded leftward (to the left in Fig. 5 and toward the front of the paper in Fig. 18) (see Fig. 5), completing the molding of the finished product FP. At this time, the remaining portion of the sixth portion BL32 is brought into contact with the receiving surface 22c of the die 22 (two-dot chain line in Fig. 18). The process of bending the remaining part of the sixth portion BL32 of the third portion BL3 to the left (to the left in FIG. 5 and toward the front of the paper in FIG. 18) by the punch 34 is an example of an embodiment corresponding to the "third press process" in the present invention. The bending directions of the sixth portion BL32 and the eighth portion BL42, i.e., the left direction in FIG. 5 and the front direction in FIG. 18, are an example of an embodiment corresponding to the "fourth direction" in the present invention.

[0040] Finally, as shown in Figure 23, the actuators 4,4 raise the dies 22,24 (slide upward in Figure 23) and the actuator 4 slides the punch 34 to the left (left in Figure 23), thereby opening the mold unit 6 and making it possible to remove the finished product FP.

[0041] In this manner, according to the present embodiment, the second portion BL2, the tongue piece Tp, the third portion BL3, and the fourth portion BL4 can be bent while the material BL is placed on the placement surface 21a. That is, it is not necessary to arrange the dies for bending the second portion BL2, the tongue piece Tp, the third portion BL3, and the fourth portion BL4 in the order of processing, and to transport the material BL to the dies for the next bending process each time one bending process is completed, so that it is possible to save space in the transport direction of the material BL. In addition, since the dies 22, 24 and the punches 26, 28, 30, 32, 34 are driven by separate actuators 4, 4, 4, . . ., each actuator 4, 4, 4, . . . only needs to have a pressing force required for each press process. This allows the actuators 4, 4, 4, . . . to be made compact. As a result, it is possible to make the press processing device 1 compact.

[0042] Furthermore, according to this embodiment, the step of folding the third portion BL3, which is one of the edges extending in the longitudinal direction of the material BL formed into an L-shape by folding the second portion BL2, is performed in two steps, namely, press working with the punch 32 and press working with the punch 34. This makes it possible to suppress the occurrence of "wrinkles" due to compressive stress generated when folding the third portion BL3, compared to a case in which the third portion BL3 is folded in a single step, thereby improving the quality.

[0043] In the present embodiment, the die unit 6 is configured to perform only bending, but is not limited thereto. For example, the die unit 6 may be configured to perform shearing or punching in addition to or instead of bending.

[0044] In the present embodiment, first, the fifth portion BL31 and a part of the sixth portion BL32 are bent by the punch 32, and then the remaining portion of the sixth portion BL32 is bent by the punch 34, thereby bending the third portion BL3, but this is not limited thereto. For example, first, the sixth portion BL32 and a part of the fifth portion BL31 may be bent by the punch 34, and then the remaining portion of the fifth portion BL31 is bent by the punch 32, thereby bending the third portion BL3.

[0045] The present embodiment shows an example of a mode for carrying out the present invention, and therefore the present invention is not limited to the configuration of the present embodiment. [Explanation of symbols]

[0046] 1 Press processing equipment (press processing equipment) 2 Frame (equipment frame) 4 Actuator (first drive unit, second drive unit, third drive unit, fourth drive unit) 6 Mold Unit 12 Upper wall 12a opening 14 Lower wall 16 Left Wall 18 Right wall 20 Die set (mold base) 21 Placement table (placement part) 21a Placement surface (placement surface) 22 Die (Die) 22a Pressing surface (first surface) 22b Receiving surface (2nd surface) 22c Receiving surface (3rd surface) 22d receiving surface 24 Die 24a Receiver 24b Receiver 26 Punch (1st Punch) 28 Punch 30 Punch 32 punch (2nd punch) 34 Punch (3rd Punch) DA mold unit placement area R Rod BL Material (Material) BL1 Part 1 (Part 1) BL2 Part 2 (Part 2, Part 3) BL3 Part 3 (Part 2, Part 4) BL31 Part 5 (Part 2, Part 4, Part 5) BL32 Part 6 (Part 2, Part 4, Part 6) BL4 Part 4 (Part 2) BL41 Part 7 (Part 2) BL42 Part 8 (Part 2) FP Finished product (Finished product) Tp tongue piece CP1 Connection piece CP2 Connection piece

Claims

1. A press processing device capable of forming a finished product from a plate-shaped material, A mold base and a placement section having a placement surface on which the material can be placed and fixed to the mold base; a first punch slidably disposed on the die base so as to perform a first press working on the material placed on the placement surface; a second punch slidably disposed on the die base so as to perform a second press process on the material placed on the placement surface, the first pressed material having been subjected to the first press process; first and second drive units connected to the first and second punches so as to be capable of driving the first and second punches; a third punch capable of performing a third press working on the second pressed material placed on the placement surface, the second pressed material having been subjected to the second press working; a third drive unit connected to the third punch so as to be capable of driving the third punch; Equipped with the material can be placed on the placement surface in a state where a second portion of the material excluding a first portion of the material protrudes; the second portion has a third portion that protrudes in at least a first direction in a first extension direction that is one of the extension directions of the material, and a fourth portion that protrudes in a second direction in a second orthogonal direction that is orthogonal to both a first orthogonal direction that is orthogonal to an imaginary plane including the placement surface and the first extension direction, the fourth portion has a fifth portion extending along the first portion and a sixth portion extending along the third portion, the first punch is disposed on the die base so as to be reciprocally slidable in the first orthogonal direction so as to be able to bend the third portion in a third direction among the first orthogonal directions; the second punch is disposed on the die base so as to be reciprocally slidable in the first orthogonal direction so as to be able to fold at least a part of the fifth portion in the third direction, or so as to be able to fold the fifth portion in the third direction and at least a part of the sixth portion in a fourth direction opposite to the first direction; The third punch is disposed on the die base so as to be capable of bending the remaining portion of the fifth portion in the third direction and bending the sixth portion in the fourth direction, or so as to be capable of bending the remaining portion of the sixth portion in the fourth direction, and is disposed on the die base so as to be capable of sliding back and forth in the first extension direction. Press processing equipment.

2. The apparatus further comprises a device frame; the mold base is removably disposed on the apparatus frame; the first and second punches are removable from the apparatus frame via the die base; The first and second drive units are fixed to the device frame. The press working device according to claim 1 .

3. the third punch is removable from the apparatus frame via the die base; The third drive unit is fixed to the device frame. The press working device according to claim 2 .

4. a die disposed on the mold base so as to be reciprocally slidable in the first orthogonal direction; and a fourth drive unit connected to the die so as to be capable of driving the die; The die has a first surface arranged to face the placement surface so as to be able to come into contact with the first portion, a second surface arranged at a position facing the first punch during the first press working and with which the third portion can come into contact, and a third surface arranged at a position facing the second and third punches during the second and third press workings and with which the fourth portion can come into contact.

4. The press working apparatus according to claim 1, wherein the pressing member is a metal plate.

5. The fourth drive unit is fixed to the device frame. The press working apparatus according to claim 4 depending on claim 2 or claim 3.

6. A mold base and A mounting portion having a mounting surface on which a plate-shaped material can be placed and fixed to the mold base; a first punch slidably disposed on the die base so as to perform a first press working on the material placed on the placement surface; a second punch slidably disposed on the die base so as to perform a second press process on the material placed on the placement surface, the first pressed material having been subjected to the first press process; a third punch slidably disposed on the die base so as to perform a third press process on the second pressed material placed on the placement surface, the second pressed material having been subjected to the second press process; first, second and third drive units connected to the first, second and third punches so as to be capable of driving the first, second and third punches; A press working method capable of forming a finished product from the material using a press working apparatus comprising: (a) placing the material on the placement surface in a state in which a second portion of the material excluding a first portion of the material is protruding; (b) driving the first driving unit to operate the first punch, thereby bending a third portion of the second portion, which protrudes in at least a first direction in a first extension direction that is one of the extension directions of the material, in a third direction in a first orthogonal direction that is orthogonal to an imaginary plane including the placement surface; (c) driving the second driving unit to operate the second punch, thereby bending at least a part of a fifth part of a fourth part of the second part that protrudes in at least a second direction in a second orthogonal direction that is orthogonal to both the first orthogonal direction and the first extension direction and extends along the first part, in the third direction, or bending the fifth part in the third direction and bending at least a part of a sixth part of the fourth part that extends along the third part, in a fourth direction opposite to the first direction; (d) driving the third driving unit to operate the third punch, thereby bending the remainder of the fifth portion in the third direction and bending the sixth portion in the fourth direction, or bending the remainder of the sixth portion in the fourth direction; The finished product is formed by Press processing method.

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