Multiple-shape cutting blanking die apparatus

Abstract

To provide a blanking die apparatus capable of eliminating the need for die replacement for each of multiple types of blank materials in a blanking die apparatus that performs processing of multiple types of shapes, and capable of realizing switching of operations for each type.SOLUTION: A multiple-shaped cutting blanking die apparatus is configured with a lower die in which a plurality of lower cutting edges are arranged sequentially in a feed direction of a material, and an upper die in which upper cutting edges that mesh with the respective lower cutting edges are arranged sequentially. A position of a rear support portion is adjusted to match a width of a strip-shaped steel sheet to be subjected to blanking processing. Processing of multiple types of shapes can be realized by making a scrap material collecting portion which collects a scrap material generated during processing of the blank material movable so as not to interfere with other devices.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a blanking die device for machining a plurality of types of shapes. [Background technology]

[0002] Conventionally, blanking of multiple shapes has typically been performed by attaching dies for each shape to a single press machine, blanking a predetermined number of blanks of a given shape, and then replacing the dies to process the next blank of a different shape. However, because the press machines and dies used to blank large parts such as automotive outer panels and side doors are large, heavy machinery such as a crane is required to replace the dies. Furthermore, because the setup and work required for die replacement takes time and effort, it is not desirable to replace the dies each time.

[0003] Therefore, a single blanking die device is provided with a plurality of types of upper cutting blades and lower cutting blades corresponding to the shapes of a plurality of types of blank material, thereby enabling machining of a plurality of types of blank material.

[0004] However, since the blanks after processing vary in shape and the width of the steel plates used as raw materials also vary, processing multiple types of blanks using the same equipment requires adjustments for each blank. However, since the blanks move in the same direction as the material feed, processing each blank requires ingenuity in switching the equipment's operation. Furthermore, since scrap material is generated in addition to the blanks during blanking, sorting the processed materials, including the blanks, becomes more complicated.

[0005] Therefore, for example, Patent Document 1 discloses a technique for a blanking die device that can blank a plurality of different shapes and sort the processed materials.

[0006] The technology disclosed in Patent Document 1 is a blanking device for manufacturing vehicle body panels that simultaneously punches out a plurality of regions to manufacture blank materials for outer side panels of automobiles.

[0007] This blanking device has inclined plates below the lower blank mold that constitutes the blank press device, which allow two types of scrap material to slide down in a direction approximately perpendicular to the transport direction of the strip steel plate, and stoppers provided at the midpoint of the inclination of each inclined plate.

[0008] The stoppers on each inclined plate can be projected from the inclined surface at the desired timing to temporarily stop the scrap material sliding down the inclined surface and allow the scrap material to reach the outlet end of the inclined plate simultaneously, thereby ensuring that the scrap material can be reliably stored in the stacking device that stores scrap material from the blanking device. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent Publication No. 2021-094595 Summary of the Invention [Problem to be solved by the invention]

[0010] The technology disclosed in Patent Document 1 includes a plurality of accumulation areas for separately accumulating each scrap material generated by the punching process of the blank press device, and an accumulation device having an alignment device for aligning the scrap material accumulated in each accumulation area. In addition, in order to allow the scrap material to reach the accumulation areas simultaneously and be stored, it requires an inclined surface for sliding the scrap material down, a stopper that can receive the sliding scrap material, and a protrusion timing adjustment device that adjusts the timing at which the stopper protrudes, which results in a complex configuration.

[0011] The present invention has been made in view of the above-mentioned problems, and has as its object to provide a blanking die device that can process a plurality of types of shapes with a simple configuration. [Means for solving the problem]

[0012] The blanking die device of the present invention has a lower die having a plurality of lower cutting blades arranged in sequence in the feed direction of the strip steel plate, and an upper die having upper cutting blades that mesh with each lower cutting blade arranged in sequence in the feed direction of the strip steel plate, and the height of each upper cutting blade is formed to increase in sequence from the upstream side to the downstream side in the material feed direction, and by adjusting the meshing depth of each pair of corresponding upper and lower cutting blades, blanking processing can be performed with a predetermined upper cutting blade and lower cutting blade, a conveying section is arranged below each lower cutting blade for conveying the strip steel plate processed by each pair of corresponding upper and lower cutting blades to the outlet of the die device, the conveying section is arranged so as to be inclined toward the downstream outlet, and has a plurality of roller chute sections arranged to have a predetermined gap through which scrap material can fall, a scrap material recovery section is provided in the gap of the roller chute section to prevent the scrap material from scattering, and the scrap material recovery section is configured to be able to be raised and lowered.

[0013] In addition, the blanking die device according to the present invention is characterized in that a rear support portion is provided at an insertion port for inserting a strip steel plate into the die device, and the rear support portion is configured to be able to be raised and lowered.

[0014] The blanking die device according to the present invention is characterized in that a conveying drive unit is provided on the upstream side of each of the plurality of roller chutes. [Effects of the Invention]

[0015] The multiple shape cutting blanking die device according to the present invention has a lower die in which a plurality of lower cutting blades are arranged in order in the feed direction of the strip steel plate, and an upper die in which upper cutting blades that mesh with each lower cutting blade are arranged in order in the feed direction of the strip steel plate, and the height of each upper cutting blade is formed to increase in order from the upstream side to the downstream side in the feed direction of the material, and by adjusting the meshing depth of a pair of upper and lower corresponding cutting blades, blanking processing can be performed with a predetermined upper cutting blade and lower cutting blade, and a conveying section that conveys the strip steel plate processed by each pair of upper and lower corresponding cutting blades to the outlet of the die device is arranged below each lower cutting blade, and the conveying section is provided so as to be inclined toward the downstream outlet, and has a predetermined gap through which scrap material falls. The machine has a plurality of roller chute sections arranged to prevent scrap material from scattering, and a scrap material recovery section is provided in the gaps between the roller chute sections to prevent scrap material from scattering.The scrap material recovery section is configured to be able to move up and down, so that a pair of upper and lower cutting blades can be selected to be used in accordance with the blank material to be blanked, making it unnecessary to change dies.This saves time and effort in the setup and work of changing dies, and prevents scrap material generated when processing strip steel plate from scattering inside the die device.Furthermore, when there is no need to collect scrap material generated when processing strip steel plate, it can be moved downward to a position where it does not interfere with the transport of the processed blank material.

[0016] According to another aspect of the multiple shape cutting blanking die device of the present invention, a rear support portion is provided at the insertion port for inserting the strip steel plate into the die device, and the rear support portion is configured to be able to be raised and lowered, so that the support portion for the strip steel plate can be easily switched depending on the width of the strip steel plate to be inserted into the die device.

[0017] According to another aspect of the multiple shape cutting blanking die device of the present invention, a conveying drive unit is provided upstream of each of the multiple roller chute sections, so that even if the inclination angle of the roller chute section is small, the processed blank material can be conveyed to the outlet of the die device by the power of the conveying drive unit. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a diagram showing an example of the overall configuration of a press machine to which a die device according to an embodiment of the present invention is attached; [Figure 2] 1A to 1C are diagrams showing examples of a plurality of types of blank materials blanked by a die device according to an embodiment of the present invention. [Figure 3] 1A and 1B are diagrams illustrating an example of a blank material continuously blanked by a die device according to an embodiment of the present invention, in which (a) is a schematic plan view showing the state before the material reaches an upper die, (b) is a schematic plan view showing the state after the material has been punched, and (c) is a schematic plan view showing the state after the blank material has been formed by blanking. [Figure 4] 10A and 10B are diagrams showing another example of a blank material continuously blanked by the die device according to one embodiment of the present invention. [Figure 5] 7 is a schematic cross-sectional view taken along line EE in FIG. 6, showing the positions of the upper cutting edge and the lower cutting edge of the die device according to one embodiment of the present invention. [Figure 6] 1 is a schematic plan view of a mold device according to an embodiment of the present invention. [Figure 7] FIG. 2 is a schematic side view showing the positions of a front guide and a side guide of a mold device according to an embodiment of the present invention. [Figure 8] FIG. 2 is a schematic front view showing an example of the positions of a front guide and a side guide of a mold device according to an embodiment of the present invention. [Figure 9] FIG. 10 is a schematic front view showing another example of the positions of the front guide and the side guide of the mold device according to one embodiment of the present invention. [Figure 10] 3 is a schematic cross-sectional view illustrating blanking performed by a first upper cutting edge and a first lower cutting edge of a die device according to one embodiment of the present invention. FIG. [Figure 11] 10 is a schematic cross-sectional view illustrating blanking performed by a second upper cutting edge and a second lower cutting edge of a die device according to one embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] The present invention aims to enable efficient blanking of multiple types of shapes in a die device that blanks blanks into multiple shapes by devising the configuration of a rear support section for transporting the blanks to a predetermined position and a scrap material recovery section for recovering scrap material generated during blanking.

[0020] The configuration of a die device 1 for blanking according to this embodiment will be described below with reference to Figures 1 to 11. However, because the structure of an actual die device is extremely complex, these drawings are schematic and depict only the essential parts, and the dimensional ratios of the various parts do not necessarily correspond to the actual ones. It goes without saying that the drawings also include parts with different dimensional relationships and ratios. In this embodiment, the direction in which the strip steel sheet S is fed is referred to as the front-rear direction, the left and right sides of the feeding direction of the strip steel sheet S are referred to as the left-right direction, the rear side of the feeding direction of the strip steel sheet S is referred to as the upstream side, and the front side of the feeding direction of the strip steel sheet S is referred to as the downstream side.

[0021] Fig. 1 is a diagram showing an example of the overall configuration of a die apparatus 1 of the present invention. As shown in Fig. 1, the die apparatus 1 is composed of an upper press machine 6 and a lower press machine 7. The upper press machine 6 forms the upper side of the die apparatus 1 and has a slide 4 that is provided so as to be movable up and down, and an upper die 3 fixed to the slide 4.

[0022] The slide 4 has a substantially rectangular shape in a plan view, and has the upper die 3 fixed to its lower surface. The upper die 3 is fixed to the slide 4 so that the cutting blade faces downward, and is configured to move up and down in conjunction with the slide 4. In other words, the slide 4 and the upper die 3 move together as a unit.

[0023] The upper die 3 is a blade device for cutting the strip steel sheet S conveyed to the die device 1 into a predetermined shape, and as shown in FIG. 5 , a first upper cutting edge 31, a second upper cutting edge 32, and a third upper cutting edge 33 are provided in this order from the upstream side with respect to the feeding direction of the strip steel sheet S. The upper cutting edges are provided so that the amount of downward protrusion from the lower surface of the upper die 3 increases from the upstream side to the downstream side. That is, in this embodiment, the height of the second upper cutting edge 32 at the midstream is formed higher than the height of the first upper cutting edge 31 at the upstream side, and the height of the third upper cutting edge 33 at the downstream side is formed higher than the height of the second upper cutting edge 32 at the midstream side. That is, the heights of the first upper cutting edge 31 to the third upper cutting edge 33 gradually increase.

[0024] As shown in FIGS. 1 and 5, the first upper cutting edge 31 has a first cutting portion 31b and a first punching portion 31a. The first cutting portion 31b is located downstream of the first punching portion 31a. As shown in FIG. 3(c), the first cutting portion 31b is a portion that forms the front and rear edge portions of the first blank material B1 after the strip steel sheet S1 has been processed. The first punching portion 31a punches out an approximate center portion in the left-right direction of the strip steel sheet S1, and notches the rear end portion of the first blank material B1 to form a notch portion B11 in conjunction with the processing of the strip steel sheet S1 by the first cutting portion 31b.

[0025] The second upper cutting edge 32 has a second cutting portion 32b and a second punching portion 32a. The second cutting portion 32b is located downstream of the second punching portion 32a. The second cutting portion 32b is a portion that forms the front and rear edge portions of the second blank material B2 after the strip steel sheet S2 has been processed. The second punching portion 32a punches out an approximate center portion in the left-right direction of the strip steel sheet S2, and notches the rear end portion of the second blank material B2 to form a notch portion B22 in conjunction with the processing of the strip steel sheet S2 by the second cutting portion 32b.

[0026] As shown in FIG. 4, the third upper cutting edge 33 is a portion that forms the front and rear edge portions of the third blank material B3 after the strip-shaped steel plate S3 is machined.

[0027] As shown in Figures 1 and 5, the lower press machine 7 has a bolster plate 5 formed in the shape of a thick plate, a rear support section 8 connected to the rear end of the bolster plate 5, a lower die 2 placed and fixed on the upper surface of the bolster plate 5, a work transport section 9 housed in the bolster plate 5 and provided below the lower die 2, which transports the first blank B1 or the second blank B2 machined by the die device 1 to a predetermined location, and a scrap material punching section 10 also housed in the bolster plate 5 and provided midway through the work transport section 9 (see Figure 6).

[0028] As shown in Fig. 6, bolster plate 5 is formed in a substantially rectangular shape in a plan view, with a plurality of guide members 86 provided upright near the left and right edges. Bolster plate 5 aligns strip-shaped steel plate S3 by guide members 86 (see Fig. 9). Rear support portion 8 is connected and fixed to the rear side of such bolster plate 5.

[0029] As shown in FIGS. 1 and 8, the rear support portion 8 has a cylinder portion 81 provided on the rear side surface of the bolster plate 5, and a rear plate portion 82 connected to the upper end of the cylinder portion 81.

[0030] The cylinder portion 81 has a cylinder 81a provided on the rear side of the bolster plate 5, near the lower part of the approximate center in the left-right direction, and a piston rod 81b provided above the cylinder 81a and movable up and down relative to the cylinder 81a. The rear plate portion 82 is connected to the upper end of the piston rod 81b.

[0031] The rear plate portion 82 has a plate main body 82a connected to the piston rod 81b, rear guides 83, 83 provided near the left and right ends of the plate main body 82a, side bars 84, 84 provided near the left and right ends of the plate main body 82a and further outward in the left-right direction than the rear guides 83, 83, and a width adjustment portion 85 placed on the upper surface of the plate main body 82a and capable of moving the rear guides 83, 83 arranged opposite each other on the left and right toward and away from each other.

[0032] Plate body 82a is configured to be able to move up and down in conjunction with the vertical extension and contraction of piston rod 81b. When piston rod 81b is in the contracted state, plate body 82a is configured so that its upper surface is approximately flush with the upper surface of bolster plate 5 (see FIG. 9), and when piston rod 81b is in the extended state, its lower surface is approximately flush with the upper surface of bolster plate 5 (see FIG. 8).

[0033] 6, 8, and 9, the rear guides 83 are disposed opposite each other near the left and right ends of the plate main body 82a. The rear guides 83 have steel plate guide portions 83a and steel plate support portions 83b. The rear guides 83 are formed into a substantially L-shape by the steel plate guide portions 83a and the steel plate support portions 83b when viewed from the feed direction of the strip-shaped steel plate S.

[0034] The steel plate guide portions 83a are configured so that they gradually become more spaced apart from the opposing other steel plate guide portion 83a from the downstream side to the upstream side. In other words, the steel plate guide portions 83a, 83a that configure the left and right rear guides 83 are formed in a tapered shape that widens toward the upstream side.

[0035] The steel plate support portion 83b is formed in a generally arcuate shape that is convex upward when viewed from the front of the die device 1. That is, the steel plate support portion 83b is formed in an upward inclination from the front end portion to the approximate center portion with respect to the feed direction of the strip-shaped steel plate S, and is formed in a downward inclination from the approximate center portion to the rear end portion in the front-rear direction of the steel plate support portion 83b.

[0036] The side bars 84 are formed in the shape of solid pipes, and the steel strip S is provided so that it can move along the upper surface thereof. The side bars 84 are provided so that their upper ends are positioned higher than the upper ends of the steel plate guide portions 83a. The side bars 84 function as supports to prevent the steel strip S from sagging under its own weight when the steel strip S is fed downstream.

[0037] The width adjustment portion 85 is located on the upper surface of the plate main body 82a, outside the rear guide 83. The width adjustment portion 85 is composed of a cylinder 85a and a piston rod 85b. The piston rod 85b is connected to the rear guide 83 at its tip. The width adjustment portion 85 is configured so that the rear guides 83, 83 arranged opposite to each other on the left and right, can move closer to and away from each other as the piston rod 85b extends and retracts relative to the cylinder 85a. That is, when the cylinder 85a is in an extended state, the left and right rear guides 83 are brought closer to each other, and when the cylinder 85a is in a retracted state, the left and right rear guides 83 are separated from each other. In this way, by configuring the width adjustment portion 85 so that the rear guides 83, 83 can move closer to and away from each other, the width of the rear guide 83 can be adjusted to match the width of the strip steel sheet S to be processed. Note that the cylinder 85a and the piston rod 85b are configured to be fixable at any position. However, in this embodiment, the piston rod 85b is configured to be used in its fully extended and fully retracted states. This eliminates the need to adjust the extension length of the piston rod 85b from the cylinder 85a depending on the width of the strip steel plate S to be processed, and the width between the left and right rear guides 83, 83 can be smoothly switched to match the width of the strip steel plate S.

[0038] As shown in Fig. 5, the lower die 2 is a blade device for cutting the strip steel sheet S into a predetermined shape, and has cutting blades for blanking. The cutting blades provided on the lower die 2 are a first lower cutting blade 21, a second lower cutting blade 22, and a third lower cutting blade 23, which are provided in this order from the upstream side to the downstream side of the lower die 2, and protrude upward from the upper surface of the lower die 2. The upper ends of the lower cutting blades are formed at approximately the same height.

[0039] The lower cutting edges are arranged in pairs, one above the other, so that the first upper cutting edge 31 and the first lower cutting edge 21, the second upper cutting edge 32 and the second lower cutting edge 22, and the third upper cutting edge 33 and the third lower cutting edge 23, respectively, mesh with each other.

[0040] 5, the first lower cutting edge 21 has a first cutting portion 21b that meshes with the first cutting portion 31b of the first upper cutting edge 31, and a first punched hole portion 21a that meshes with the first punched portion 31a. The first cutting portion 21b is provided downstream of the first punched hole portion 21a, and its front end portion functions as a cutting blade that cuts the strip steel sheet S. Like the first cutting portion 31b, the first cutting portion 21b is formed linearly in a direction perpendicular to the feed direction of the strip steel sheet S, i.e., in the left-right direction of the die device 1. In other words, the first cutting portion 21b meshes with the first cutting portion 31b to cut the strip steel sheet S linearly in the left-right direction, thereby forming the front and rear end portions of the first blank B1.

[0041] As shown in FIGS. 3(a) to 3(c) and 6, the first punched hole portion 21a is formed in a substantially triangular shape with its apex in the feed direction of the strip-shaped steel sheet S, and is a hole portion through which the first punched portion 31a of the first upper cutting edge 31 is inserted when it meshes with the first punched portion 31a. By inserting the first punched portion 31a into the first punched hole portion 21a, the strip-shaped steel sheet S can be processed into a shape that follows the periphery of the first punched hole portion 21a. At this time, the first scrap material W1 cut and formed by the first punched portion 31a is discharged to the outside of the die device 1 through a first scrap chute 13 connected to the lower part of the first punched hole portion 21a.

[0042] The first blank B1 is formed by meshing the first upper cutting edge 31 of the upper die 3 and the first lower cutting edge 21 of the lower die 2 configured in this manner. The first blank B1 formed on the upstream side of the die device 1 is transported to a predetermined location via a blank transport section 90 provided below the lower die 2.

[0043] 5, the second lower cutting edge 22 has a second cutting portion 22b that meshes with the second cutting portion 32b of the second upper cutting edge 32, and a second punched hole portion 22a that meshes with the second punched portion 32a. The second cutting portion 22b is provided downstream of the second punched hole portion 22a, and its front end functions as a cutting blade that cuts the steel strip S. Like the second cutting portion 32b, the second cutting portion 22b is formed linearly in a direction perpendicular to the feed direction of the steel strip S, i.e., in the left-right direction of the die device 1. In other words, the second cutting portion 22b meshes with the second cutting portion 32b to cut the steel strip S linearly in the left-right direction, thereby forming the front and rear end portions of the second blank B2.

[0044] As shown in Figures 3(a) to 3(c) and 6, the second punched hole portion 22a is formed in a substantially triangular shape with its apex in the feed direction of the strip-shaped steel sheet S, and is a hole portion through which the second punched portion 32a of the second upper cutting edge 32 is inserted when it engages with the second punched portion 32a. By inserting the second punched portion 32a into the second punched hole portion 22a, the strip-shaped steel sheet S can be processed into a shape that follows the periphery of the second punched hole portion 22a. At this time, the second scrap material W2 cut and formed by the second punched portion 32a is discharged to the outside of the die device 1 by a scrap material recovery unit 15 (described later) provided below the second punched hole portion 22a.

[0045] The second blank B2 is formed by meshing the second upper cutting edge 32 of the upper die 3 and the second lower cutting edge 22 of the lower die 2 configured in this manner. The second blank B2 formed in the midstream of the die device 1 is transported to a predetermined location via the blank transport section 90.

[0046] 4 and 5, the front end of the third lower cutting edge 23 functions as a cutting edge that cuts the steel strip S. The third lower cutting edge 23 meshes with the third upper cutting edge 33 to cut the steel strip S into a predetermined shape and form the front and rear end portions of the third blank B3.

[0047] The upper cutting edges of the upper die 3 and the lower cutting edges of the lower die 2 are configured in the relationship described above, and when the first upper cutting edge 31 and the first lower cutting edge 21 located upstream cut the strip steel plate S (strip steel plate S1), when the upper die 3 reaches the bottom dead center, the upper cutting edges and the lower cutting edges are all in mesh with each other.

[0048] Furthermore, when cutting a strip steel plate S (strip steel plate S2) with the second upper cutting blade 32 and second lower cutting blade 22 located in the midstream, when the upper mold 3 reaches the bottom dead center, the second upper cutting blade 32 and second lower cutting blade 22 located in the midstream become meshed, the first upper cutting blade 31 and first lower cutting blade 21 located upstream become separated by a certain distance and become in an open state, and the third upper cutting blade 33 and third lower cutting blade 23 located downstream become meshed.

[0049] Furthermore, when cutting a strip steel plate S (strip steel plate S3) with the third upper cutting blade 33 and third lower cutting blade 23 located downstream, when the upper mold 3 reaches the bottom dead center, the downstream third upper cutting blade 33 and third lower cutting blade 23 become meshed, and the upstream first upper cutting blade 31 and first lower cutting blade 21, and the midstream second upper cutting blade 32 and second lower cutting blade 22 become open, spaced a certain distance apart.

[0050] For blanking processing by the mold device 1 in this embodiment, one of the upper and lower cutting blades that correspond to each other in a pair is used, namely, the first upper cutting blade 31 and the first lower cutting blade 21, the second upper cutting blade 32 and the second lower cutting blade 22, and the third upper cutting blade 33 and the third lower cutting blade 23. The selection of which upper or lower cutting blade to use for blanking processing is made by adjusting the height of the upper mold 3 when it is located at the bottom dead center, i.e., the die height DH.

[0051] The die height DH refers to the height between the bottom surface of the slide 4 and the top surface of the bolster plate 5 when the upper die 3 is moved to the bottom dead center, which is the lowest position of the slide 4, as shown in Fig. 5. By adjusting the die height DH in this way, blanking can be performed using any pair of upper and lower cutting edges, namely the first upper cutting edge 31 and the first lower cutting edge 21, the second upper cutting edge 32 and the second lower cutting edge 22, or the third upper cutting edge 33 and the third lower cutting edge 23.

[0052] Here, an adjustment method for changing the state in which the upstream first upper cutting edge 31 and the first lower cutting edge 21 are intermeshed to a state in which the second upper cutting edge 32 and the second lower cutting edge 22 are intermeshed to cut will be described. Specifically, this change method is described as follows: First, the height of the upper die 3 is raised by the amount by which the height of the lower end face of the midstream second upper cutting edge 32 is configured to be higher than the height of the lower end face of the first upper cutting edge 31. That is, by raising the upper die 3 by a difference amount A representing the difference between the amount by which the first upper cutting edge 31 protrudes from the lower face of the upper die 3 and the amount by which the second upper cutting edge 32 protrudes from the lower face of the upper die 3, the intermeshed state between the first upper cutting edge 31 and the first lower cutting edge 21 is released.

[0053] By performing this adjustment, the height of the lower end surface of the second upper cutting blade 32 provided in the midstream relative to the upper surface of the lower die 2 becomes the same as the height of the lower end surface of the first upper cutting blade 31 relative to the upper surface of the lower die 2 before the adjustment, and the midstream second upper cutting blade 32 and the second lower cutting blade 22 become able to mesh together for cutting. The meshing state between the upstream first upper cutting blade 31 and the first lower cutting blade 21 becomes a constantly open state during blanking because the upper die 3 has been raised by the difference amount A. At this time, the downstream third upper cutting blade 33 is positioned lower than the lower end surface of the midstream second upper cutting blade 32, so the third upper cutting blade 33 and the third lower cutting blade 23 mesh together. In this state, the blanking is performed by the midstream second upper cutting blade 32 and the second lower cutting blade 22, and therefore the strip steel sheet S (strip steel sheet S2) is not fed between the downstream third upper cutting blade 33 and the third lower cutting blade 23. Therefore, there is no risk that the third upper cutting edge 33 and the third lower cutting edge 23 will perform blanking on the strip steel sheet S (strip steel sheet S2).

[0054] The method of adjusting the die device 1 from a state in which the midstream second upper cutting blade 32 and second lower cutting blade 22 can cut the strip steel plate S (strip steel plate S2) to a state in which the downstream third upper cutting blade 33 and third lower cutting blade 23 can cut the strip steel plate S (strip steel plate S3) is similar to that described above. In other words, the height of the lower end face of the downstream third upper cutting blade 33 is adjusted by raising the upper die 3 by the difference B between the height of the lower end face of the midstream second upper cutting blade 32.

[0055] The die height DH is generally adjusted by turning a slide adjustment screw (not shown) provided on the die assembly 1. That is, by turning the slide adjustment screw, the height of the slide 4 is increased or decreased, and accordingly the height of the upper die 3 fixed to the slide 4 is increased or decreased, thereby adjusting the depth of engagement between the first upper cutting edge 31 and the first lower cutting edge 21, the second upper cutting edge 32 and the second lower cutting edge 22, and the third upper cutting edge 33 and the third lower cutting edge 23, and thereby changing the position where blanking can be performed.

[0056] By adjusting the die height DH as described above, it is possible to switch which of the upstream first upper cutting blade 31 and first lower cutting blade 21, the midstream second upper cutting blade 32 and second lower cutting blade 22, and the downstream third upper cutting blade 33 and third lower cutting blade 23 is used to blank the strip steel sheet S.

[0057] The material to be blanked is, for example, sheet steel. As shown in Figure 1, the sheet steel is set in an uncoiler U1 in the form of a coil material wound into a strip-shaped steel sheet S. The sheet steel is then pulled out from the uncoiler U1 by a feeder U4 provided in the die device 1. The pulled-out strip-shaped steel sheet S is inserted into a leveler U2, where it is flattened by a plurality of rollers U3 built into the leveler U2 to remove distortions and the like, and then fed into the insertion opening 20 of the die device 1.

[0058] 2, the strip steel sheet S is inserted into the insertion opening 20 of the die device 1, and is processed into any one of the first blank material B1, the second blank material B2, and the third blank material B3 by using the upper and lower cutting blades, namely the first upper cutting blade 31 and the first lower cutting blade 21, the second upper cutting blade 32 and the second lower cutting blade 22, or the third upper cutting blade 33 and the third lower cutting blade 23, provided on the upper die 3 and the lower die 2. In this embodiment, the strip steel sheet S1 is processed into the first blank material B1 by the die device 1, the strip steel sheet S2 is processed into the second blank material B2 by the die device 1, and the strip steel sheet S3 is processed into the third blank material B3 by the die device 1.

[0059] 3(a) to 3(c) show an example of a first blank B1 formed by continuously blanking a strip-shaped steel sheet S1 using the first upper cutting blade 31 and the first lower cutting blade 21 located upstream of the die device 1. FIG. 3(a) is a schematic plan view showing the state of the strip-shaped steel sheet S1 before it reaches the first lower cutting blade 21, FIG. 3(b) is a diagram showing the state of the strip-shaped steel sheet S1 processed by the first punching section 31a and the first punched hole section 21a, and FIG. 3(c) is a diagram showing the state of the first blank B1 formed. As shown in FIGS. 3(a) to 3(b), the strip-shaped steel sheet S1 is fed from the left to the right in FIG. 3, and when it reaches FIG. 3(b), the first punching section 31a and the first punched hole section 21a engage with each other, forming a notch B11 in the first blank B1. Then, when the strip steel plate S1 is fed from the state shown in Figure 3(b) to the state shown in Figure 3(c), the first cutting portion 21b and the first cutting portion 31b engage with each other, causing the strip steel plate S1 to be separated and a first blank material B1 to be formed.

[0060] The second blank B2, which is formed by continuously blanking the steel strip S with the second upper cutting edge 32 and the second lower cutting edge 22 located midstream of the die device 1, is similar to the example of the first blank B1. That is, the shape of the second punching portion 32a and the inner peripheral edge of the second lower cutting edge 22 that meshes with the second punching portion 32a determines the cut surface shape of the second scrap material W2 cut out from the second blank B2, and the shape of the rear end of the midstream second cutting portion 32b determines the shapes of the front and rear end faces of the second blank B2. In this embodiment, the rear end shape of the second cutting portion 32b is formed linearly in a direction perpendicular to the feed direction of the steel strip S.

[0061] 4 shows an example of processing a third blank B3 formed by continuously blanking a strip-shaped steel sheet S3 with the third upper cutting edge 33 and the third lower cutting edge 23 located downstream of the die device 1. The shapes of the blades of the third upper cutting edge 33 and the third lower cutting edge 23 determine the shape of the cut surface of the blanked third blank B3. In processing the strip-shaped steel sheet S downstream of the die device 1, the front and rear end faces of the third blank B3 are formed to have the same shape, so no scrap material is generated.

[0062] Below each of the lower cutting blades 21, 22, 23 formed in this manner is a blank material transport section 90. The blank material transport section 90 is provided downstream of each lower cutting blade and transports each blank material (first blank material B1, second blank material B2) cut and formed in each upstream and midstream cutting section to the accumulation device U5. The blank material transport section 90 has a plurality of roller chute sections 91 and transport drive sections 92 provided upstream of each roller chute section 91.

[0063] 10 and 11, roller chute 91 includes, from upstream to downstream, a first roller chute 91a, a second roller chute 91b, and a third roller chute 91c. Also, a fourth roller chute 91d is provided above the left and right outer sides of second roller chute 91b. Each of roller chutes 91a, 91b, 91c, and 91d is inclined downward from upstream to downstream.

[0064] The first roller chute 91a has a starting end below the first cutting sections 21b and 31b and a terminal end below the approximately center of the second lower cutting blade 22 in the front-rear direction. The first roller chute 91a is a roller-convex structure consisting of multiple small rollers arranged at regular intervals from upstream to downstream, in a downwardly inclined linear configuration. The roller-convex rollers constituting the first roller chute 91a are spaced a regular distance apart in the left-right direction. The distance between the left and right roller-convex rollers is slightly narrower than the left-right width of the first lower cutting blade 21. In other words, the distance between the left and right roller-convex rollers constituting the first roller chute 91a is smaller than the left-right width of the first blank material B1 transported on the roller-convex roller. This allows the first blank material B1 cut and formed by the upstream first cutting sections 21b and 31b to be transported along the slope of the first roller chute 91a toward the stacking device U5. The other roller chute sections 91b, 91c, and 91d differ only in their location and inclination angle toward downstream, and other configurations are substantially the same as the first roller chute section 91a, so detailed explanations will be omitted.

[0065] The second roller chute 91b is configured substantially identically to the first roller chute 91a, and the width between the left and right roller conveyors is also substantially the same. The roller conveyors that make up the second roller chute 91b have a starting end located below the second cutting portions 22b and 32b and a terminal end located below the rear end of the third lower cutting blade 23.

[0066] The third roller chute 91c is configured substantially identically to the first roller chute 91a, and the width between the left and right roller conveyor rollers is also substantially the same. The roller conveyor rollers that make up the third roller chute 91c have their starting ends located below and near the rear end of the third lower cutting edge 23 that makes up the third cutting portion, and their terminal ends located below and near the front end of the third upper cutting edge 33.

[0067] The fourth roller chute 91d is configured substantially identically to the first roller chute 91a, with the width between the rollers on either side wider than the width of the rollers constituting the second roller chute 91b. The inclination angle from upstream to downstream is greater than that of the other conveyors. This allows the second blanks B2 processed by the second cutting sections 22b and 32b to be transported by the momentum of their own weight along the roller constituting the rollers and move to the stacking device U5 without stopping midway. After passing the terminal end of the fourth roller chute 91d, the second blanks B2 are transferred to the third roller chute 91c and then to the stacking device U5.

[0068] 10 and 11, the conveying drive units 92 are provided adjacent to the upstream ends of the roller chute units 91a, 91b, and 91c, except for the fourth roller chute unit 91d. The conveying drive units 92 include a first drive unit 92a, a second drive unit 92b, and a third drive unit 92c, provided in this order from upstream to downstream.

[0069] The first driving unit 92a is provided below the first cutting unit 21b and is formed to be narrower in width than the first cutting unit 21b and wider in width than the first roller chute unit 91a. The first driving unit 92a is a conveyance assist mechanism that sends the first blank B1 formed by cutting the strip-shaped steel sheet S1 by the first cutting units 21b, 31b downstream.

[0070] The second driving section 92b is provided below and near the second cutting section 22b and is narrower than the left-right width of the first cutting section 21b and the second cutting section 22b, but wider than the left-right width of the first roller chute section 91a and the second roller chute section 91b. The second driving section 92b is a conveyance auxiliary mechanism that sends the first blank B1 formed by cutting the strip steel sheet S1 by the first cutting sections 21b and 31b to the second roller chute section 91b.

[0071] The third drive unit 92c is provided below the rear end of the third lower cutting blade 23, and is formed to be narrower in width than the second cutting unit 22b and wider in width than the second roller chute unit 91b and the fourth roller chute unit 91d. The third drive unit 92c is a conveyance assist mechanism that sends out, to the third roller chute unit 91c, a first blank B1 formed by cutting the strip steel sheet S1 with the first cutting units 21b, 31b, and a second blank B2 formed by cutting the strip steel sheet S2 with the second cutting units 22b, 32b.

[0072] The first, second, and third drive units 92a, 92b, and 92c are autonomous roller conveyors that house a motor and gears in a cylindrical outer tube that rotates in response to the motor's drive. Each drive unit 92a, 92b, and 92c is a so-called power mower that rotates in the feed direction of the blank B1 or blank B2 when powered. As mentioned above, each drive unit 92a, 92b, and 92c is located near the upstream end of each roller chute, forcing the processed blanks B1 and B2 to be transported to the stacking device U5.

[0073] In this way, the first blank B1 machined by the first upper cutting blade 31 and first lower cutting blade 21 located on the upstream side of the die device 1 advances downstream along the first roller chute 91a due to its own weight and the downstream feeding operation of the first drive unit 92a, and reaches the second roller chute 91b. Then, due to the feeding operation of the second drive unit 92b, the first blank B1 advances downstream along the second roller chute 91b and reaches the third roller chute 91c. Then, due to the feeding operation of the third drive unit 92c, the first blank B1 advances downstream along the third roller chute 91c and is stored in the accumulation device U5.

[0074] The second blank B2 machined by the second upper cutting blade 32 and the second lower cutting blade 22 located midstream of the die device 1 advances downstream along the fourth roller chute 91d due to its own weight and the inclination of the fourth roller chute 91d, and reaches the third roller chute 91c. Thereafter, the second blank B2 advances downstream along the third roller chute 91c due to the delivery operation of the third drive unit 92c, and is stored in the accumulation device U5.

[0075] The third blank B3 machined by the third upper cutting edge 33 and the third lower cutting edge 23 located downstream of the die device 1 is immediately stored in the accumulation device U5 after being machined.

[0076] Additionally, guide members are provided on the outside of both left and right ends of the installation surface of each roller chute section to prevent the first blank B1 or second blank B2 from protruding to the left or right while moving through each roller chute section 91a, 91b, 91c, 91d. This allows the processed blanks B1, B2 to be transported to the accumulation device U5 without falling from each roller chute section 91a, 91b, 91c, 91d.

[0077] As shown in Figure 11, the scrap material recovery section 15 is located below the second punched hole section 22a, near the downstream end of the first roller chute section 91a, and in the left-right center of the roller control rollers that make up the first roller chute section 91a, which are located a certain distance apart.

[0078] The scrap material collecting section 15 has a lifting cylinder 11, a collecting section 12 connected to the upper end of the lifting cylinder 11, and a second scrap chute 14 connected to the collecting section 12 (see FIG. 6). The collecting section 12 is configured to be able to move up and down via the lifting cylinder 11.

[0079] The collection section 12 is formed in a generally box-like shape with an open top, and its bottom is inclined to either the left or right, with the tip of the inclination open. That is, of the left and right side walls that form the box shape of the collection section 12, the side wall connected to the second scrap chute 14 has an opening at its lower end. The second scrap chute 14 is connected to the opening of the collection section 12. In addition, the collection section 12 is formed larger than the second punched hole portion 22a that constitutes the second lower cutting edge 22 in a plan view, so that when the collection section 12 is raised by the lifting cylinder 11, it comes into contact with the underside of the second lower cutting edge 22 and covers the opening shape of the second punched hole portion 22a.

[0080] As shown in Fig. 6, the second scrap chute 14 extends in a direction perpendicular to the feed direction of the strip steel sheet S, with its base end connected to the recovery section 12 and its tip end located outside the die device 1. The second scrap chute 14 has an inclined plate 14a along which the second scrap material W2 slides, and side guards 14b, 14b that are formed by bending the front and rear ends of the inclined plate 14a upward and extending upward. The second scrap chute 14 is formed by the inclined plate 14a and the front and rear side guards 14b, 14b in a generally U-shaped cross section with an open upper side.

[0081] 10, when the first upper cutting blade 31 and the first lower cutting blade 21 are engaged and the first blank B1 is being blanked, the recovery section 12 is lowered by the operation of the lifting cylinder 11, and the upper end of the recovery section 12 is moved below the conveying surface of the first roller chute 91a. That is, the upper end of the recovery section 12 is moved to a position where it does not come into contact with the first blank B1 that falls into the first roller chute 91a located immediately downstream of the first lower cutting blade 21 and moves downstream along the conveying surface of the first roller chute 91a. In this way, when the blank B (first blank B1) is being processed using the strip steel plate S (strip steel plate S1), the lifting cylinder 11 can move the recovery section 12 downward and retreat to a position where it does not interfere with the conveyance of the first blank B1.

[0082] 11 , when the second upper cutting blade 32 and the second lower cutting blade 22 are engaged and capable of cutting the second blank B2, the scrap material recovery unit 15 uses the lifting cylinder 11 to raise the recovery unit 12 to a position where it contacts the underside of the second lower cutting blade 22, and recovers the second scrap material W2 generated when the strip steel plate S (strip steel plate S2) is processed by the second punching unit 32a and the second punched hole unit 22a. This configuration prevents the second scrap material W2 from scattering from the upper end of the recovery unit 12. In other words, this configuration minimizes the risk that the second scrap material W2 will scatter inside the lower press machine 7 and get caught on the first roller chute unit 91a, the second drive unit 92b, or the like that constitutes the lower press machine 7, preventing these members from performing their predetermined operations.

[0083] The mold device 1 of this embodiment is configured as described above, and by providing rear guides 83, 83 with an approximately L-shaped cross section that widens on the upstream side at the insertion port 20 through which the strip steel plate S to be blanked is inserted into the mold device 1, it is made easy to insert the strip steel plate S fed via the feed device U4 into the mold device 1.

[0084] In addition, the steel plate support portion 83b that constitutes the rear guides 83, 83 is formed in a mountain shape toward the feed direction of the strip steel plate S, making it easier to introduce the strip steel plate S (strip steel plate S1 and strip steel plate S2) into the mold device 1.

[0085] Furthermore, the rear plate portion 82 is configured so that the distance between the rear guides 83, 83 can be moved closer or farther away by the width adjustment portion 85, and the rear plate portion 82 can be raised and lowered by the cylinder portion 81, so that the support position of the strip steel sheet S when it is inserted into the die device 1 can be easily adjusted according to the width of the strip steel sheet S to be processed. In other words, when inserting the strip steel sheet S1 into the die device 1, the piston rod 81b of the cylinder portion 81 is extended to the maximum while the piston rod 85b of the width adjustment portion 85 is contracted to the maximum, so that the strip steel sheet S1 is inserted into the die device 1 while being supported by the steel sheet support portion 83b.

[0086] Furthermore, when inserting the strip steel plate S2 into the mold device 1, the piston rod 81b of the cylinder portion 81 is extended to its maximum extent while the piston rod 85b of the width adjustment portion 85 is extended to its maximum extent, so that the strip steel plate S2 is inserted into the mold device 1 while being supported by the steel plate support portion 83b.

[0087] In addition, when inserting the strip steel plate S3 into the mold device 1, the piston rod 81b of the cylinder portion 81 is contracted to the maximum extent, so that the strip steel plate S3 is inserted into the mold device 1 while being supported by the upper end of the side bar 84.

[0088] Furthermore, by configuring the recovery section 12 of the scrap material recovery section 15 to be movable up and down by the lifting cylinder 11 and allowing the lower end of the recovery section 12 to come into contact with the lower surface of the second punched hole section 22a, the second scrap material W2 formed during the blanking process of the strip steel plate S2 is prevented from scattering within the die device 1 and can be reliably discharged to the outside of the die device 1. Furthermore, when processing the strip steel plate S1, the recovery section 12 of the scrap material recovery section 15 is lowered by the lifting cylinder 11, allowing the first blank material B1 to be retracted from the conveying path of the first roller chute section 91a. In this way, by configuring the scrap material recovery section 15 to be movable up and down, the second scrap material W2 generated during the blanking process is prevented from scattering within the die device 1 and the first blank material B1 can be moved to the accumulation device U5.

[0089] Next, the operation of the die apparatus 1 when blanking is performed using the die apparatus 1 will be described. Figures 7, 8, and 10 are schematic cross-sectional views and side views of the first blank B1 being blanked by the upstream pair of first upper cutting edge 31 and first lower cutting edge 21. Figures 7, 8, and 11 are schematic cross-sectional views and side views of the second blank B2 being blanked by the midstream pair of second upper cutting edge 32 and second lower cutting edge 22. Figure 9 is a schematic cross-sectional view of the third blank B3 being blanked by the downstream pair of third upper cutting edge 33 and third lower cutting edge 23.

[0090] First, a description will be given of the case where the first blank B1 is continuously blanked by the meshing of the upstream first upper cutting edge 31 and the first lower cutting edge 21. As described above, the height of the upper die 3 is adjusted to set the die height DH at a predetermined interval, so that the pair of first upper cutting edges 31 and first lower cutting edges 21 provided on the upstream side of the die assembly 1 mesh together to enable cutting. In addition, the piston rod 85b of the width adjustment portion 85 of the insertion port 20 provided on the rear side of the die assembly 1 is contracted to the maximum extent, so that the opening between the left and right rear guides 83, 83 becomes the widest.

[0091] As shown in Figures 6, 7, 8, and 10, the strip steel sheet S1 inserted through the insertion opening 20 of the die device 1 is positioned in the width direction by the rear guide 83 and is supported from below by the steel sheet support portions 83b, 83b. The strip steel sheet S1 is fed downstream a predetermined length by the feed device U4 and positioned between the first upper cutting edge 31 and the first lower cutting edge 21. In this state, the upper die 3 is lowered as the slide 4 of the upper press machine 6 descends, causing the first upper cutting edge 31 and the first lower cutting edge 21 to mesh. When the first upper cutting edge 31 and the first lower cutting edge 21 mesh, the strip steel sheet S1 is cut to the circumferential shape of the upper and lower cutting edges, and a first blank B1 is formed.

[0092] The first blank B1 falls onto the first roller chute 91a and the first drive unit 92a of the blank conveying unit 90, which is provided immediately below the downstream side of the first lower cutting blade 21. The first blank B1 is sent downstream by the rotational drive of the first drive unit 92a, slides down the first roller chute 91a, and is transferred to the accumulation device U5.

[0093] When cutting of the first blank B1 by the first upper cutting blade 31 and the first lower cutting blade 21 is completed, the slide 4 moves up and, in conjunction with this, the feed device U4 feeds the strip steel sheet S1 forward by the front-to-rear length of the first blank B1, so that the strip steel sheet S1 protrudes from the front end of the first lower cutting blade 21 by the front-to-rear length of the first blank B1. When the slide 4 is lowered in this state, the upper die 3 moves down in conjunction with the operation of the slide 4, and the first upper cutting blade 31 and the first lower cutting blade 21 mesh together to form the first blank B1.

[0094] At this time, the first scrap material W1 formed during processing of the first blank material B1 falls into the first scrap chute 13 located directly below the first punched hole portion 21a of the first lower cutting edge 21, as shown in Figure 10, and is discharged from either the left or right side of the mold device 1 along the inclined plate 13a of the first scrap chute 13.

[0095] When processing the strip steel plate S1 using the first upper cutting blade 31 and the first lower cutting blade 21 provided upstream of the die device 1, the scrap material recovery section 15 moves downward so that the recovery section 12 is positioned below the upper end of the first roller chute section 91a, and the first blank material B1 processed by the first upper cutting blade 31 and the first lower cutting blade 21 does not block the conveying path toward the accumulation device U5.

[0096] By repeating the above-described operations, the first blank pieces B1 are blanked one after another by the first upper cutting blade 31 and the first lower cutting blade 21, and can be accumulated in the accumulation device U5.

[0097] Next, we will explain the operation when blanking the second blank B2 using the second upper cutting blade 32 and the second lower cutting blade 22 provided midstream of the die device 1. In order to blank the strip steel sheet S2 by the meshing of the second upper cutting blade 32 and the second lower cutting blade 22, it is necessary to configure the die device so that the strip steel sheet S2 can pass between the first upper cutting blade 31 and the first lower cutting blade 21 on the upstream side and be fed to between the second upper cutting blade 32 and the second lower cutting blade 22 on the midstream side.

[0098] Therefore, as described above, when the lower die 2 is moved to the bottom dead center, the second upper cutting edge 32 and the second lower cutting edge 22 mesh with each other, and the die height DH is adjusted to a height at which a gap is created between the first upper cutting edge 31 and the first lower cutting edge 21. As a result, as shown in Fig. 11, the strip steel sheet S2 passes directly through the upstream first upper cutting edge 31 and the first lower cutting edge 21 without interfering with them, is fed forward by a predetermined length by the feed device U4, and is placed between the midstream second upper cutting edge 32 and the second lower cutting edge 22. In this state, the upper die 3 descends, and the second upper cutting edge 32 and the second lower cutting edge 22 mesh with each other, enabling the strip steel sheet S2 to be cut to the shape of the peripheral surface of the blade.

[0099] Furthermore, when the second upper cutting edge 32 and the second lower cutting edge 22 are in a state of meshing together so as to be able to cut, the piston rod 81b of the cylinder portion 81 is extended to its maximum extent, and the rear guides 83, 83 and the side bars 84, 84 move in the width direction to match the width of the strip steel plate S2, as shown in Figure 8. This positions the strip steel plate S2, and allows it to be fed to the cutting point of the die device 1 without swinging the strip steel plate S2 in the left-right direction.

[0100] Furthermore, when the second upper cutting edge 32 and the second lower cutting edge 22 are in a state in which they are engaged to be cut, the scrap material recovery unit 15 operates the lifting cylinder 11 to raise the recovery unit 12 to a position in which it contacts the lower surface of the second lower cutting edge 22. In other words, when the second upper cutting edge 32 and the second lower cutting edge 22 are in a state in which they can process the strip steel plate S2, the upper edge of the recovery unit 12 rises to a position that covers the second punched hole portion 22a and is pressed against the lower surface of the second lower cutting edge 22. This allows the scrap material recovery unit 15 to reliably discharge the second scrap material W2 formed by the second punched hole portion 22a and the second punched portion 32a to the outside of the die device 1 while preventing it from scattering inside the lower press machine 7.

[0101] The second scrap material W2 generated during the processing of the second blank material B2 falls into a collection section 12 provided between the roller control rollers formed in a straight line toward the downstream side on the left and right sides that constitute the first roller chute section 91a, as shown in Figure 11.

[0102] The second scrap material W2 that has fallen into the recovery section 12 is discharged from either the left or right side of the die device 1 along the inclined plate 14a of the second scrap chute 14 from an opening provided in the side wall surface of the recovery section 12. The second scrap material W2 is discharged in a direction perpendicular to the conveying direction of the second blank material B2.

[0103] Similarly, the steel strip S2 is successively fed and cut by the longitudinal length of the second blank material B2, and the cut second blank materials B2 fall successively onto the fourth roller chute portion 91d immediately below the downstream side of the second lower cutting blade 22. The second blank material B2 that has fallen onto the fourth roller chute portion 91d slides down from the fourth roller chute portion 91d onto the third roller chute portion 91c and is transferred to the accumulation device U5.

[0104] Next, a description will be given of blanking the third blank B3 using the downstream pair of third upper cutting blade 33 and third lower cutting blade 23. In order to blank the third blank B3 by meshing the third upper cutting blade 33 and the third lower cutting blade 23, a configuration is required in which the strip steel sheet S3 can pass between the upstream first upper cutting blade 31 and the first lower cutting blade 21 and between the midstream second upper cutting blade 32 and the second lower cutting blade 22, and can be fed to between the downstream third upper cutting blade 33 and the third lower cutting blade 23.

[0105] For this reason, as described above, the die height DH of the upper die 3 is set to a predetermined height and adjusted so that the first upper cutting edge 31 and the first lower cutting edge 21, and the second upper cutting edge 32 and the second lower cutting edge 22 do not mesh with each other. This maintains the upstream first upper cutting edge 31 and the first lower cutting edge 21 and the midstream second upper cutting edge 32 and the second lower cutting edge 22 always spaced apart, and as shown in FIG. 9 , the cylinder portion 81 of the rear support portion 8 is driven to move the rear guide 83 and the side bar 84 downward so that the rear support portion 8 does not obstruct the forward movement of the strip steel sheet S3. As a result, the strip steel sheet S3 is supported by the upper portion of the side bar 84 and moved downstream, passes between the upstream first upper cutting edge 31 and the first lower cutting edge 21 and between the midstream second upper cutting edge 32 and the second lower cutting edge 22, and is positioned between the downstream third upper cutting edge 33 and the third lower cutting edge 23. In this state, the upper die 3 descends, the third upper cutting edge 33 engages with the third lower cutting edge 23, and the strip-shaped steel sheet S3 is cut into the shape of the peripheral surface of the blade.

[0106] The cut steel strip S3 is transported by a feeder (not shown) and transferred to an accumulation device U5. The front and rear ends of the third blank B3 are machined to the same shape, so no scrap material is generated during processing. In other words, the cutting operation immediately before the creation of the third blank B3 forms the front end of the next third blank B3, so no scrap material is generated during processing downstream of the die device 1.

[0107] When the above cutting by the third upper cutting blade 33 and the third lower cutting blade 23 is completed, in order to perform the next blanking process, the strip steel sheet S3 is fed by a predetermined length by the feed device U4 and is again positioned between the third upper cutting blade 33 and the third lower cutting blade 23. In this state, the upper die 3 descends, the third upper cutting blade 33 and the third lower cutting blade 23 mesh together, and the strip steel sheet S3 is cut to the shape of the peripheral surface of the blade, forming a third blank B3.

[0108] Thereafter, the strip steel plate S3 is fed one after another in the same manner by a predetermined length and cut, and the cut and formed third blanks B3 are transported one after another by the feeder and transferred to the accumulation device U5.

[0109] By repeating the above-described operations, the third blank pieces B3 are blanked one after another by the third upper cutting blade 33 and the third lower cutting blade 23, and are accumulated in the accumulation device U5.

[0110] The cylinder according to this embodiment can be switched by controlling the pneumatic system so that the related functional parts are compatible with the selected pair of upper and lower cutting blades. With this configuration, multiple types of shapes can be machined with one die device 1 by a simple switching operation.

[0111] As described above, in the die apparatus 1 according to this embodiment, switching between the upstream pair of the first upper cutting blade 31 and the first lower cutting blade 21, the midstream pair of the second upper cutting blade 32 and the second lower cutting blade 22, and the downstream pair of the third upper cutting blade 33 and the third lower cutting blade 23 can be performed by adjusting the die height DH, adjusting the width of the rear guides 83, 83 by operating the cylinder, and adjusting the vertical positions of the side bars 84, 84. This significantly reduces setup time and labor compared to the conventional method of replacing dies. Furthermore, by providing two adjustment mechanisms, the cylinder unit 81 and the width adjustment unit 85, for inserting three strip steel sheets S of different widths into the die apparatus 1, a compact steel sheet feeding mechanism compatible with each strip steel sheet can be realized.

[0112] Furthermore, by adjusting the vertical position of the recovery section 12 using the lifting cylinder 11 that constitutes the scrap material recovery section 15, it is possible to adjust whether the recovery section 12 is located above or below the first roller chute section 91a, thereby avoiding interference with other devices that constitute the die apparatus 1 and recovering the second scrap material W2 without increasing the size of the die apparatus 1. Furthermore, by raising the recovery section 12 of the scrap material recovery section 15 to a position directly below the downstream side of the second upper cutting blade 32 and the second lower cutting blade 22 that blank the strip steel plate S2 and abutting against the underside of the second lower cutting blade 22 so as to cover the second punched hole portion 22a, the second scrap material W2 can be discharged to the outside of the die apparatus 1 while preventing it from scattering inside the die apparatus 1, and therefore the risk of the second scrap material W2 affecting the operation of the die apparatus 1 can be reduced as much as possible.

[0113] Furthermore, the first blank material B1 and the second blank material B2 formed by blanking processing can be transported to the accumulation device U5 after processing without being affected by the inclination angle of the roller chute section 91, thanks to the configuration in which multiple conveying drive units 92 are provided up to the accumulation device U5.

[0114] The mold apparatus 1 according to the present invention described in the above embodiments is not limited to the above embodiments, but also includes configurations in which the components disclosed in the above embodiments are substituted with each other or the combination is changed, known inventions, and configurations in which the components disclosed in the above embodiments are substituted with each other or the combination is changed, etc. Furthermore, the technical scope of the present invention is not limited to the above embodiments, but extends to the matters set forth in the claims and their equivalents.

[0115] Furthermore, in the embodiment of the present invention, the shapes of the cutting edges of the corresponding first upper cutting edge 31 and first lower cutting edge 21, the second upper cutting edge 32 and second lower cutting edge 22, and the third upper cutting edge 33 and third lower cutting edge 23, as well as the shapes of the blank materials B1, B2, and B3, are not limited to the shapes described in the drawings, and needless to say, include any shape that can be cut by a pair of upper and lower cutting edges.

[0116] Furthermore, the number and arrangement of the roller conveyor rollers that make up the roller chute section 91 are not limited to those described in the drawings, and it goes without saying that the number and arrangement can be increased or decreased as needed. [Explanation of symbols]

[0117] 1. Mold equipment 2 Lower mold 3 Upper mold 4 slides 5 Bolster Plate 6 Upper press machine 7 Lower press machine 8 Rear support 9 Work transport section 10 Scrap material punching section 11 Lifting cylinder 12 Collection Department 13 No. 1 Scrap Chute 13a Inclined plate 13b Side guard 14 Second Scrap Chute 14a Inclined plate 14b Side guard 15 Scrap material recovery section 20 Insertion port 21 1st lower cutting edge 21a First punched hole portion 21b 1st cutting section 22 2nd lower cutting edge 22a Second punched hole portion 22b 2nd cutting section 23 3rd lower cutting edge 31 1st upper cutting edge 31a First punching section 31b 1st cutting section 32 2nd upper cutting edge 32a Second punching section 32b 2nd cutting section 33 3rd upper cutting edge 81 Cylinder section 81a Cylinder 81b Piston rod 82 Rear plate part 82a Plate body 83 Rear guide 83a Steel plate guide part 83b Steel plate support part 84 Sidebar 85 Width adjustment section 85a cylinder 85b Piston rod 86 Guide member 90 Blank material conveying section 91 Roller chute section 91a First roller chute 91b Second roller chute section 91c Third roller chute 91d 4th roller chute 92 Conveyor drive unit 92a First drive unit 92b Second drive unit 92c Third drive unit B Blank material B1 First blank B2 Second blank material B3 Third blank material B11 Notch B12 Notch DH Die Height S Steel strip S1 No. 1 steel strip S2 Second steel strip S3 Third steel strip U1 Uncoiler U2 Leveler U3 Lola U4 Feeder U5 Integrated Device W1 First scrap material W2 Second scrap material

Claims

1. a lower die having a plurality of lower cutting blades arranged in order in the feed direction of the strip steel plate; an upper die in which upper cutting blades meshing with the respective lower cutting blades are arranged in order in the feed direction of the strip steel plate; and The height of each upper cutting edge is formed to increase in order from the upstream side to the downstream side in the material feed direction, and by adjusting the meshing depth of a pair of upper and lower corresponding cutting edges, blanking processing can be performed with a predetermined upper cutting edge and lower cutting edge. A conveying section is disposed below each lower cutting blade to convey the blank material machined by each pair of upper and lower cutting blades to an outlet of the die device, the conveying section is provided so as to be inclined toward the downstream outlet, and has a plurality of roller chute sections arranged so as to have a predetermined gap through which scrap material generated during processing of the blank material falls, a scrap material recovery section is provided in the gap of the roller chute section to prevent the scrap material from scattering; A multiple shape cutting blanking die device characterized in that the scrap material recovery section is configured to be able to be raised and lowered.

2. a rear support portion is provided at an insertion port for inserting the strip steel plate into the die device; 2. The blanking die device for cutting plural shapes according to claim 1, wherein the rear support portion is configured to be movable up and down.

3. 3. The blanking die device for cutting a plurality of shapes according to claim 1, wherein a conveying drive unit is provided upstream of each of the plurality of roller chutes.

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