JP3841923B2 - Mold changing method, mold storage device and bending system in bending machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mold exchanging method, a mold storage device, and a bending system in a bending machine.
[0002]
[Prior art]
Conventionally, punches and dies, which are molds used in press brakes as bending machines, store a plurality of punches with predetermined lengths in an upper table, and these punches are used as a chain mechanism or a link mechanism. The desired punch corresponding to the size of the workpiece is selected by turning it.
[0003]
However, when using a punch having a predetermined length, there is no problem when a punch having a desired length is stored, but when a punch having an appropriate length is not stored. May not be processed properly. In addition, there is a problem that the front and back cannot be selected even when the front and back of the punch are determined depending on the content of processing.
[0004]
In order to solve such a problem, as shown in FIG. 27, a plurality of punches P divided in the longitudinal direction of the upper table 301 (left and right direction in FIG. 27) are mounted so as to have a desired length. The punch P has been moved to the central portion, or unnecessary punches P have been moved to both ends to make the length appropriate.
[0005]
[Problems to be solved by the invention]
However, even if the punch P is attached as shown in FIG. 27, the overall length of the punch P can be adjusted, but the shape and front / back of the punch P cannot be selected. is there.
[0006]
The object of the present invention is made by paying attention to the conventional techniques as described above, and is to select a mold having an optimum shape for processing, set it to a desired length, and convey it to a bending machine. It is an object of the present invention to provide a mold exchanging method, a mold storage device, and a bending system in a bending machine capable of performing the above.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, a die changing method in the bending machine of the invention according to claim 1 is:A mold exchanging method in a bending machine for bending a plate material by cooperation of a punch and a die includes the following steps.
(1) A first long punch group formed by combining long punches having a width of 100 mm and a second long punch group formed by combining long punches having a width of 200 mm are movably provided. Between the long punch group and the second long punch group, there is provided a space in which a short punch group formed by combining short punches having a width of 50 mm, 15 mm or 10 mm can be mounted movably and a die can be mounted. Selecting a mold station having a desired long punch group from a plurality of mold stations;
(2) From the die station storing a plurality of diesSelecting a die corresponding to the combined length of the desired long punch group and short punch group selected in step (1);
(3) The aboveStep (2)A step of attaching the die selected in step 1 to the mold station,
(4) A step of creating a short punch having a desired length by combining the short punches,
(5) In the mold station,A step of creating a punch having a desired length by combining the first and second long punch groups in the step (1) and the short punch having a desired length in the step (4);
(6) The aboveStep (5)The process of transporting the mold station to the bending machine,
[0009]
Therefore, an appropriate long punch is selected from the long punches stored in the mold storage device, and the short punch is selected to form a punch having a desired length in combination with this long punch. Combine these at the station. Further, a die corresponding to a desired punch is selected and mounted on the mold station together with the created punch. In this way, a die station in which a punch having a desired length and a die corresponding to the punch are mounted at the same core position is carried into a bending machine, and the die is exchanged.
[0010]
  A method for exchanging dies in a bending machine according to claim 2 is the method according to claim 1.Step (4)But multiple typesSaidA short punch of a desired length is selected from the short punch storing portion storing the short punch, and this selectedShortIt has a process of closely attaching the punch so that there is no gap.AndIt is a feature.
[0011]
Accordingly, the selected plurality of short punches are brought into close contact with each other so that there is no gap, and are mounted on the mold station as one short punch.
[0012]
  The method for exchanging dies in a bending machine according to claim 3 is the method according to claim 1.After the step (5) has mounted the short punch produced in the step (4) between the first long punch group and the second long punch group mounted on the mold station The first long punch group, the second long punch group, and the short punch are brought close to each other to bring the punches into close contact with each other.
[0013]
Therefore, the produced short punch is inserted between the long punches and attached to the mold station, and the long punches on both sides are brought close to each other so that there is no gap.
[0014]
  The die changer in the bending machine of the invention according to claim 4 is:A mold storage apparatus in a bending machine for bending a plate material by cooperation of a punch and a die, a first long punch group formed by combining long punches having a width of 100 mm, and a long member having a width of 200 mm A second long punch group comprising a combination of punches is provided so as to be able to approach and separate from each other, and a width of 50 mm, 15 mm or 10 mm is provided between the first long punch group and the second long punch group. A plurality of molds having a space in which a short punch group formed by combining the short punches can be mounted, and a die can be mounted at the same core position below the first and second long punch groups and the short punch group A plurality of short punch storages including a station, a Y axis station that transports a mold station selected from the plurality of mold stations in the Y axis direction, and a plurality of short punches. And a short automatic length in which the plurality of short punches selected in the short punch storage unit are closely contacted with each other without gaps and the contacted short punches are mounted on the mold station conveyed by the Y-axis station. A changer, a long automatic length changer that closely contacts the first long punch group, the second long punch group, and the short punch mounted on the mold station without any gaps, and the first long length A die conveyance device that comprises a punch group, the second long punch group, and the short punch group, and a die conveying device that conveys the die station having a corresponding die to a bending machine. Is a thing.
[0015]
Therefore, a die station equipped with an appropriate long punch is selected from the long punches stored in the die storage device, and the die corresponding to the long punch is aligned with the same die station. After mounting, the mold station is moved to a predetermined position by the Y-axis station. The short automatic length changer selects a proper short punch from the short punch storing portion to produce a punch having a desired length in combination with the long punch, and is moved by the Y-axis station. These are combined at the station, and the long automatic length changer brings the combined long punch and short punch into close contact. In this way, a mold station on which a punch having a desired length and a die corresponding to the punch are mounted is carried into the bending machine, and the mold is exchanged.
[0016]
  The mold exchanging device in the bending machine of the invention according to claim 5 is:5. The mold storage apparatus for a bending machine according to claim 4, wherein a mold storage apparatus comprising a die station having a plurality of types of dies to be mounted on the mold station is provided adjacent to the bending machine. It is characterized by being provided.
[0017]
  Therefore, this can be done by selecting the die corresponding to the desired punch.In addition, since the mold storage device is provided adjacent to the bending machine, the mold can be exchanged quickly..
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0023]
FIG. 6 shows the entire bending system 3 including the mold storage device 1 according to the present invention. In FIG. 6, a mold storage device 1 according to the present invention, which will be described in detail later, is provided on the leftmost side, and on the right side is a station in which a punch P and a die D are set from the mold storage device 1. A press brake 5 is provided as a bending machine that is supplied and mounted and performs bending on the workpiece W.
[0024]
A handling robot 7 that supplies a workpiece W to a processing position of the press brake 5 is provided on the front surface of the press brake 5 (the front side in the direction orthogonal to the paper surface in FIG. 6). Further, a handling robot gripper changing device 9 for changing the gripper of the handling robot 7 is provided on the right side surface of the press brake 5 in FIG.
[0025]
Further, on the rightmost side in FIG. 6, a workpiece loading device 11 (two pieces are provided in FIG. 6) on which a large number of workpieces W as workpieces are loaded is a front-rear direction (a direction perpendicular to the paper surface in FIG. 6). It is provided to move freely.
[0026]
Furthermore, a piece of workpiece W supplied by the workpiece loading device 11 is taken between the press brake 5 and the workpiece loading device 11, that is, on the front right side of the press brake 5, and is supplied to the handling robot 7. A workpiece loading / unloading robot 13 is provided to be movable in the left-right direction in FIG.
[0027]
Accordingly, the workpiece loading device 11 on which a large amount of workpieces W are loaded in advance is moved back and forth, the workpiece loading / unloading robot 13 is moved to the right to take one workpiece W, and the workpiece loading / unloading robot 13 is moved to the right. Move to the left. The handling robot 7 to which a desired gripper is attached by the handling robot gripper changing device 9 is supplied with the workpiece W from the workpiece loading / unloading robot 13 and supplies the workpiece W to the processing position of the press brake 5. The press brake 5 performs a desired bending process on the supplied workpiece W. In this bending process, the press brake 5 is supplied and replaced with a punch P and a die D which are optimal for the process by the mold storage device 1 which will be described in detail below.
[0028]
Next, the above-described mold storage device 1 will be described in detail with reference to FIGS. The mold storage device 1 includes a bottom frame 15 that forms a rectangular bottom so that the whole forms a rectangular parallelepiped, a column frame 17 that is provided vertically from the four corners of the bottom frame 15, and the column It has a framework consisting of a rectangular upper frame 19 supported by a frame 17.
[0029]
4, 7 and 8, the left and right X-axis upper members 23 </ b> L and 23 </ b> R provided between the two Y-axis upper members 21 provided on the same surface as the upper frame 19 are A Y-axis upper ball screw 25, which is a Y-axis feed mechanism, is rotatably provided. The Y-axis upper ball screw 25 has a Y-axis upper motor 27 as shown in FIG. A sprocket 31 that is rotationally driven via a rotation transmission member such as a chain 29 is attached.
[0030]
On the lower side of the Y-axis upper member 21, Y-axis upper guide rails 33 are provided in the Y-axis direction. A suspension slider 35 that is movable in the Y-axis direction along the Y-axis upper guide rail 33 is provided. A Y-axis station 37 having an upper surface is provided. The Y-axis station 37 is provided with a Y-axis upper ball nut 39 that is screwed into the Y-axis upper ball screw 25 described above.
[0031]
Accordingly, when the sprocket 31 is rotated by the Y-axis upper motor 27 via the chain 29 and the Y-axis upper ball screw 25 is rotated, the Y-axis station 37 is moved to the Y-axis upper guide rail 33 by the action of the Y-axis upper ball nut 39. Along the Y axis.
[0032]
Referring to FIG. 1, the Y-axis station 37 is provided with two stations 37A and 37B. One station 37B is for accommodating a mold currently used in the press brake 5. The other station 37A is for holding a mold to be newly attached to the press brake 5. By comprising in this way, since the metal mold | die used for the next process can be prepared during the process in the press brake 5, it becomes possible to perform the exchange operation | work of a metal mold | die in a short time.
[0033]
3 and 9, a plurality of (here, five) pillars 41 are provided between the bottom frame 15 and the upper frame 19 on both the left and right sides in FIG. Each cylinder 43 is provided. A Z-axis guide rail 45 is provided in the vertical direction on the rear surface (right side in FIG. 3) of the column 41, and a lifter 47 is provided along the Z-axis guide rail 45 so as to be movable up and down. A mold station 49 for carrying the punch P and the die D as a set is attached to the lifter 47.
[0034]
10A and 10B, the mold station 49 has a rectangular frame including an upper member 51, a lower member 53, and a column 55 having a small thickness. (A) Clamp bases 57 that are clamped when the mold station 49 is conveyed are provided at the upper and lower corners on the left side of the center. A guide rail 59 is provided on the lower surface of the upper member 51 in front of the column 55 (left side in FIG. 10B) over almost the entire length in the X-axis direction.
[0035]
Referring to FIG. 11, a roller 61 is provided on the guide rail 59, and the punch holder 63 is suspended so as to be movable in the X-axis direction. Further, the upper end portion 73 of the punch P is attached to the attachment portion 69 provided so as to protrude from the lower end portion of the holder 67 with a bolt 71. Note that the front and back of the punch P can be attached in either direction.
[0036]
The holder 67 is fixed to the lower surface of the punch holder 63 by being biased upward by a spring 68 via a guide 62, a slide rail 64 and a suspension bolt 66, and when the punch P is moved in the longitudinal direction. Is performed by pressing the spring 68 downward by the pressing member 70 with an air cylinder, lowering the guide 62 downward, and releasing the contact between the holder 67 and the punch holder 63.
[0037]
Accordingly, as shown in FIG. 10A, the upper member 51 of the mold station 49 has a plurality of types of long punches P (for example, a long punch P having a width of 100 mm).₁3 and 200mm wide long punch P₂Are connected to a punch holder 63 via a holder 67, and the punch holder 63 is movably attached to a guide rail 59. The space 75 provided in the central portion of the upper member 51 is provided for setting a short punch PS having a short length, which will be described later, to form a punch P having a desired length.
[0038]
Note that one of the five mold stations 49 is not equipped with the punch P as described above and is in an empty state, so that the desired punch P can be installed later. ing.
[0039]
On the other hand, referring to FIG. 5 and FIGS. 12 to 14, the bottom frame 15 is provided with two X-axis lower members 77 in the X-axis direction. A Y-axis lower member 79 is provided. A bearing 81 is provided on the upper side of the X-axis lower member 77, and a Y-axis lower ball screw 83 is rotatably provided. A sprocket 85 is attached to the Y-axis lower ball screw 83 and is connected to a Y-axis lower motor 89 through a chain 87 (see FIG. 2).
[0040]
Further, Y-axis lower guide rails 91 are respectively provided on the upper side of the Y-axis lower member 79. A die station 95 having a slider 93 that is movable in the Y-axis direction is provided on the upper side of the Y-axis lower guide rail 91, and the die station 95 is screwed into the Y-axis lower ball screw 83. An under-axis ball nut 97 is attached.
[0041]
Accordingly, when the sprocket 85 is rotated by the Y-axis lower motor 89 via the chain 87 and the Y-axis lower ball screw 83 is rotated, the die station 95 moves along the Y-axis lower guide rail 91 by the action of the Y-axis lower ball nut 97. Move in the Y-axis direction.
[0042]
Referring to FIGS. 13 and 14, the die station 95 is provided with a plurality of (here, four) clasps 99. This clasp 99 is used to attach the die holder 101 with variously shaped dies D or dies D of different lengths to the die station 95, and is fitted into a hole provided on the bottom surface of the die holder 101. A protrusion 103 is provided.
[0043]
The bottom surface of the clasp 99 is attached to the tip of the piston rod 107 of the elevating cylinder 105 and the elevating guide post 109 is attached. Since the elevating guide post 109 is slidably supported by the guide receiver 111, the clasp 99 moves up and down straight in the vertical direction.
[0044]
Therefore, the Y-axis lower motor 89 rotates the Y-axis lower ball screw 83 to move and position the die station 95 along the Y-axis lower guide rail 91 below the die station 49 storing the desired punch P. Then, the die D and the die holder 101 are raised by the elevating cylinder 105 and loaded on the desired mold station 49.
[0045]
Referring to FIG. 15, cylinders 113 are provided outward at both ends in the X-axis direction on the lower side of the Y-axis station 37 (left and right ends in FIG. 15). A lock pin 117 is attached to the tip of the piston rod 115.
[0046]
Therefore, the mold station 49 raised as described above is fixed to the Y-axis station 37 by the lock pin 117 pushed outward by the cylinder 113. Note that guide pins 119 are provided in the vertical direction on both the left and right outer sides of the Y-axis station 37 so that the mold station 49 is raised vertically upward.
[0047]
On the other hand, a plurality (four in this case) of short punch storage portions 121 are provided in the X-axis direction on the left inner side of the mold storage device 1 in FIG. Referring to FIGS. 16 to 18, in this short punch storage unit 121, the frame 127 is movably supported by two upper and lower LM guides 125 provided on the base frame 123. It can be moved in the X-axis direction by a cylinder 128 attached to the cylinder. The frame 127 has a plurality of (here, a 50 mm short punch PS).₀, 15mm short punch PS₁, 15mm short punch PS₂10mm short punch PS_Three10mm short punch PS_Four10mm short punch PS_Five) Is stored.
[0048]
Referring to FIG. 18, among the short punches PS stored in the frame 127, the 50 mm short punch PS.₀Is directly stored in the frame 127 at the clamp position, but the other five short punches PS are the 50 mm short punch PS.₀Are separately attached to the brackets 129 at positions shifted in the Y-axis direction with respect to each other. The bracket 129 is supported so as to be movable in the Y-axis direction along linear shafts 131 provided on the upper and lower sides of the frame 127.₀It is possible to move individually to the position.
[0049]
Referring to FIGS. 3, 5, 19, and 20, a short automatic length changer 135 (hereinafter referred to as a short ALC 135) is provided on the left side of the short punch storage unit 121 in FIG. 3. In this short ALC 135, a beam member 137 is provided in the X-axis direction between the column frames 17, and is supported by a slider 141 that is movable along an LM guide 139 (see FIG. 19) provided on the beam member 137. A ball nut base 143 is provided. Further, below the ball nut base 143, an X-axis ball screw 145 is rotatably provided extending in the X-axis direction in parallel with the LM guide 139. A sprocket 147 is attached to the end of the X-axis ball screw 145 and is driven to rotate by an X-axis motor 151 via a chain 149. An X-axis ball nut 153 that is screwed into the X-axis ball screw 145 is attached to the lower surface of the ball nut base 143.
[0050]
Therefore, when the X-axis ball screw 145 is rotationally driven by the X-axis motor 151, the ball nut base 143 is moved and positioned in the X-axis direction by the action of the X-axis ball nut 153.
[0051]
An LM base 155 is provided on the upper surface of the ball nut base 143 in the Y-axis direction, and a base 157 that is movable in the Y-axis direction along the LM base 155 is provided. An air cylinder 159 is provided on the LM base 155 in the Y-axis direction, and the tip of the piston rod 161 is attached to a bracket 163 provided on the lower surface of the base 157.
[0052]
An air cylinder 165 is provided on the upper surface of the base 157 in the Y-axis direction, and the tip of a piston rod 167 that can protrude rightward in FIG. 19 is connected to a clamper case 169. A slider 171 is attached to the lower surface of the clamper case 169 and is movable along a Y-axis guide rail 173 provided on the upper surface of the base 157 in the Y-axis direction.
[0053]
A first air cylinder 175 and a second air cylinder 177 are provided on the left side of the clamper case 169 in FIG. 20, and the first clamper 179 and the second air cylinder operated by the first air cylinder 175 are provided therein. A second clamper 181 actuated by 177 is juxtaposed. The first clamper 179 provided on the upper side in FIG. 20 is a 50 mm short punch PS among the short punch PS described above.₀The second clamper 181 provided on the lower side in FIG. 20 is a 15 mm short punch PS.₁~ PS_ThreeAnd 10mm short punch PS_Four, PS_FiveIs for clamping.
[0054]
Accordingly, the entire clamper case 169 is moved / positioned in the Y-axis direction along the Y-axis guide rail 173 by the action of the air cylinder 165, and the first clamper 179 operated by the first air cylinder 175 has a 50 mm short punch PS.₀The second clamper 181 that clamps the gripping part 183 provided in the cylinder and is operated by the second air cylinder 177 has another short punch PS.₁~ PS_FiveThe grip part 183 provided in the is clamped. In this state, the short punch PS is inserted into the space 75 provided in the mold station 49 by the air cylinder 159.
[0055]
FIG. 21 shows the attachment part of the short punch PS to the mold station 49. As in the case of the long punch P described above, the punch holder 185 is suspended by the roller 61 of the guide rail 59 so as to be movable in the X-axis direction. The punch holder 185 is provided with a lever 189 that is biased in a clamping direction (counterclockwise in FIG. 21) by a spring 187, and the tip of the lever 189 moves the clamp pin 191 in the right direction in FIG. By energizing, the locking portion 195 provided at the upper end portion of the short punch PS is locked through the through hole 193 provided at the lower end portion of the punch holder 185. When the short punch PS is detached from the punch holder 185, it can be easily removed by pushing the upper end of the lever 189 to the right in FIG. In addition, the front and back of the short punch PS can be attached in either direction.
[0056]
In FIG. 1, a long automatic length changer 199 (hereinafter referred to as a long ALC 199) is provided on the right side of the short ALC 135, that is, on the opposite side of the mold station 49 to which the short punch PS is attached as described above. Is provided. The long ALC 199 is used to obtain a punch P having a predetermined length by bringing the long punch P and the short punch PS mounted on the Y-axis station 37 into close contact with each other without any gap.
[0057]
22 to 24, in the long ALC 199, a pedestal 201 is provided extending in the X-axis direction, and a column 203 (see FIG. 3) provided between the upper frame 19 and the bottom frame 15 is provided. Both ends are fixed at midway height positions in (see). A base plate 205 is mounted on the gantry 201 in the X-axis direction, and LM blocks 207 are provided in the Y-axis direction on the upper surfaces of the left and right ends (the left and right ends in FIG. 22) of the base plate 205. . An LM guide 209 is provided on the LM block 207 so as to be movable in the Y-axis direction. An air cylinder 211 is provided in the Y-axis direction on the top surface of the central portion of the base plate 205 in the X-axis direction.
[0058]
On each LM guide 209, a body frame 215 vertically held by a bracket 213 is provided extending in the X-axis direction, and the piston rod 217 of the air cylinder 211 is connected to the body frame 215. ing. In addition, LM guide rails 219 are provided extending in the X-axis direction at a midway height position on the front surface (left side surface in FIG. 24) of the main body frame 215, and two LM guide rails 219 are provided. Two sets of LM guides 221 are provided in the X-axis direction, and can be moved and positioned in the X-axis direction.
[0059]
A mounting plate 223 is provided on the front surface (left side surface in FIG. 24) of each set of the LM guides 221, and a plurality of blocks 227 each having a pin 225 at the tip are provided in the mounting plate 223 in the X-axis direction ( Here, three and two) are provided. Air cylinders 229 are provided at both ends in the X-axis direction on the rear surface of the main body frame 215. The piston rod 231 of each air cylinder 229 is connected to each mounting plate 223 via a bracket 233.
[0060]
Accordingly, the pin 225 attached to the mounting plate 223 is positioned at a predetermined position in the X-axis direction by driving the air cylinder 229, and the LM guide 221 is moved back and forth in the Y-axis direction by driving the air cylinder 211. By inserting the pin 225 into the locking hole 235 of the long punch P mounted on the mold station 49 and driving the air cylinder 229 again, the long punches P can be moved toward and away from each other.
[0061]
2, 3, 25, and 26, the punch P and the die D set to a desired length as described above are carried into the press brake 5, or a mold attached to the press brake 5 is shown. A mold transfer device 237 for unloading is shown.
[0062]
In the mold conveying device 237, a receiving table 239 is provided on the left and right bottom frames 15 at a pass line PL position (see FIG. 3) for transferring the mold, and a square pipe is formed on the receiving table 239. A transport frame 241 made of metal is provided extending in the X-axis direction and protrudes from the mold storage device 1 to the left and right in FIG. Bearings 243 are respectively provided at the left and right ends in FIG. 25 on the upper surface of the transport frame 241, and a transport ball screw 245 is rotatably supported. Further, a sprocket 247 is attached to the left end portion of the transfer ball screw 245 in FIG. 25 and is connected to the transfer motor 249 by a chain 251.
[0063]
An LM guide rail 253 is provided on the upper surface of the transport frame 241 over substantially the entire length in the X-axis direction. On the LM guide rail 253, a transport base 259 having a ball nut 255 screwed to the transport ball screw 245 and having a slider 257 on the lower surface is provided so as to be movable and positioned in the X-axis direction. Yes.
[0064]
The transport table 259 is provided with a mold clamping device 261 for clamping the mold station 49. In the mold clamping device 261, as shown in FIG. 26, a clamp claw 263 for clamping the clamp base 57 of the mold station 49 from the left and right is provided by an air cylinder 265 so as to be freely opened and closed.
[0065]
Accordingly, the conveying ball screw 245 is rotationally driven by the conveying motor 249, and the mold clamping device 261 is moved to the leftmost side in FIG. 2 and FIG. 25 (state shown by a two-dot chain line in FIG. 2), and by the long ALC 199 The clamp base 57 of the mold station 49 in which the punch P is set to a predetermined length and is positioned on the pass line PL is clamped by a clamp claw 263 that is operated by an air cylinder 265. The transfer ball screw 245 is driven to rotate again by the transfer motor 249, and the mold clamp device 261 that holds the mold station 49 is moved to the right in FIG. 2 to supply the mold station 49 to the inside of the press brake 5. To do.
[0066]
Next, the overall procedure for creating a punch P having a desired length and combining it with a die D suitable for the punch P in the mold storage device 1 and mounting the punch P on the press brake 5 will be described.
[0067]
First, as shown in FIG. 10A, a mold station 49 in which a plurality of long punches P having a length corresponding to a desired length is mounted on the upper member 51 of the mold station 49. Select. For example, in FIG. 10A, three 100 mm wide punches P1 and two 200 mm wide punches P2 are movable in the X-axis direction. The space 75 provided in the central portion of the upper member 51 is provided for setting a short punch PS having a short length, which will be described later, to form a punch P having a desired length.
[0068]
Next, the die D corresponding to the aforementioned punch P is selected. 2 and 12 to 14, when the sprocket 85 is rotated by the Y-axis lower motor 89 through the chain 87 and the Y-axis lower ball screw 83 is rotated, the die station is operated by the action of the Y-axis lower ball nut 97. Since 95 moves in the Y-axis direction along the Y-axis lower guide rail 91, it moves / positions below the die station 49 storing the desired punch P. Then, the die D and the die holder 101 are raised by the elevating cylinder 105 and loaded on the desired mold station 49.
[0069]
Referring to FIGS. 3 and 9, the mold station 49 on which the die D is loaded in this way lifts the lifter 47 by the elevating cylinder 43 and, as shown in FIG. The lock pin 117 pushed outward is fixed to the Y-axis station 37. Thereafter, the lifter 47 is lowered by the elevating cylinder 43 and returned to the original position. Further, in order to mount the short punch PS on the Y-axis station 37, the Y-axis motor 27 rotates the Y-axis upper ball screw 25 to move the Y-axis station 37 to the left in the Y-axis direction in FIG. Lower to between ALC135.
[0070]
Next, the short punch PS is combined. Referring to FIG. 3 and FIG. 16 to FIG. 20, for example, when a 75 mm punch P is necessary, the X-axis motor 151 rotates the X-axis ball screw 145 to move the short ALC 135 in the X-axis direction. It moves to the front of the short punch storing part 121 in which the short punch PS is stored. Then, the first clamper 179 is moved to the short punch storage part 121 of the 50 mm short punch PS.₀Position in front of. The clamper case 169 is moved rightward in FIG. 20 by the air cylinder 165, and the first clamper 179 is moved to the 50 mm short punch PS.₀The first clamper 179 is operated by the first air cylinder 175 and the 50 mm short punch PS is operated.₀Clamp.
[0071]
Next, 15mm short punch PS used by individual cylinder 133₂And the 10 mm short punch PS3 are moved upward in the Y-axis direction in FIG. 18 to be positioned at the clamp position, and the short punch storage portion 121 is moved rightward in the X-axis direction in FIG.₀Position to touch. The second air cylinder 177 is operated and the second clamper 181 operates the 15 mm short punch PS.₂And 10mm short punch PS_ThreeClamp. Here, 15mm short punch PS₂And 10mm short punch PS_ThreeIs the most suitable for making a short punch PS with a length of 25 mm without gaps, and other 15 mm short punch PS.₁And 10mm short punch P_FourThis is because there is a gap when using such as.
[0072]
As described above, after a punch P having a desired length (75 mm in this example) is formed, the X-axis ball screw 145 is rotated by the X-axis motor 151 to move the short ALC 135 in the X-axis direction. The mold station 49 is positioned at a position corresponding to the space 75 of the central portion which is the short punch mounting position of the mold station 49 shown in FIG.
[0073]
The piston rod 167 of the air cylinder 165 provided in the short ALC 135 is extended to the right in the Y-axis direction, the first clamper 179 clamps the gripping part 183 of the 50 mm short punch PS, and the second clamper 181 15 mm short punch PS₂And 10mm short punch PS_ThreeClamp.
[0074]
Then, the air cylinder 159 is extended to the right in the Y-axis direction, and the clamped short punch PS is inserted into the space 75 provided in the center portion of the mold station 49 mounted on the Y-axis station 37. The short punch PS is fixed to the punch holder 185 when the clamp pin 191 provided on the punch holder 185 of the mold station 49 is engaged with the engaging portion 195 of the short punch PS (see FIG. 21).
[0075]
Next, referring to FIGS. 22 to 24, the pin 225 attached to the attachment plate 223 is positioned at a predetermined position in the X-axis direction by driving the air cylinder 229 of the long ALC 199, and the air cylinder 211 is driven. The pin 225 is inserted into the locking hole 235 of the long punch P attached to the Y-axis station 37 by moving back and forth in the Y-axis direction along the LM guide 209. Thereafter, by driving the air cylinder 229, the long punch P is moved toward the center, and the long punch P on both sides and the short punch PS at the center are brought into contact with each other without a gap.
[0076]
After setting the punch P to a desired length in this way, the mold station 49 is raised again and connected to the Y-axis station 37 in the same manner as described above. The Y-axis station 37 is moved to the pass line PL position, and the clamp base 57 of the mold station 49 positioned at the pass line PL position is clamped by the mold clamp device 261 of the mold transfer device 237. Finally, the conveying ball screw 245 is rotationally driven by the conveying motor 249 to move the mold clamping device 261 in the right direction in FIG. 25 to supply the mold station 49 to the inside of the press brake 5. The storage device 1 returns to the left position in FIG.
[0077]
Here, since the attachment and removal of the die station 49 in the press brake 5 are already known from Japanese Patent Laid-Open No. 7-116734, description of the configuration and operation inside the press brake 5 is omitted.
[0078]
From the above results, the punch P is composed of a combination of the long punch P and the short punch PS, and the punches P of various lengths are stored in the mold storage device 1 in advance. A punch P having a desired length can be created. In addition, since a plurality of dies D to be combined with the manufactured punch P are stored, an appropriate combination can be performed. Since the work in the mold storage device 1 can be performed independently of the press brake 5, a mold to be used next can be prepared during processing in the press brake 5. Thereby, processing efficiency can be improved.
[0079]
Further, since the punch P and the die D are supplied to the press brake 5 as a set, the die D corresponding to the punch P can be supplied without fail and the die is centered in the die storage device 1. Can do. Thereby, the metal mold | die exchange in the press brake 5 can be performed easily and rapidly.
[0080]
Further, since the Y-axis station 37 has two mold stations 49 for transporting the mold, the mold station 49 storing the mold removed from the press brake 5 and the transport to the press brake 5 from now on. Since the mold station 49 to be held can be held at the same time, the mold can be quickly replaced.
[0081]
The present invention is not limited to the above-described embodiment, and can be implemented in other modes by making appropriate modifications.
[0082]
【The invention's effect】
As described above, in the mold exchanging method in the bending machine according to the first aspect of the present invention, since a plurality of long punches are stored in the mold storage device, an appropriate long punch can be selected. . Further, since a plurality of short punches are also stored, a punch having a desired length can be created by selecting an appropriate short punch and combining it with the long punch. Further, by selecting a die corresponding to a desired punch and mounting it on a mold station incorporating the punch, the punch and die are selected and aligned at the same time. For this reason, a punch having a desired length and a die corresponding to the punch are simultaneously carried into the bending machine, so that the mold can be replaced quickly and easily.
[0083]
In the mold exchanging method in the bending machine according to the second aspect of the invention, the selected plurality of short punches are closely attached so as not to have a gap and are mounted on the mold station as a single short punch. It is possible to produce a short punch having a length of.
[0084]
In the mold changing method in the bending machine according to the invention of claim 3, the produced short punch is inserted between the long punches and attached to the mold station, and the long punches on both sides are brought close to each other so that there is a gap. As a result, it is possible to obtain a complete punch having a desired length.
[0085]
In the mold storage device in the bending machine according to the invention of claim 4, since there are a plurality of mold stations in which a plurality of long punches are stored in the mold storage device, by selecting an appropriate mold station An appropriate long punch can be selected. In addition, since a plurality of short punches are stored in the short punch storage portion of the mold storage device, a punch having a desired length is selected by selecting an appropriate short punch and combining it with the long punch at the mold station. Can be created. Further, by selecting a die corresponding to the desired punch from a die station storing a plurality of dies and mounting the die on the mold station, the punch and die are selected and aligned at the same time. In this way, the die station on which the desired punch and die are mounted is moved to the transfer position by the Y-axis station, and the punch having the desired length and the die corresponding to this punch are simultaneously turned into a bending machine by the die transfer device. Since it carries in, a metal mold | die can be replaced | exchanged quickly and easily.
[0086]
  In the die storage apparatus for a bending machine according to the fifth aspect of the present invention, since a die station storing a plurality of dies is provided, a die corresponding to a desired punch can be selected.In addition, since the mold storage device is provided adjacent to the bending machine, the mold can be exchanged quickly..
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the inside of a mold storage device according to the present invention.
FIG. 2 is a side view seen from the direction II in FIG.
FIG. 3 is a front view seen from the direction III in FIG. 2;
4 is a plan view seen from the IV direction in FIG. 1. FIG.
FIG. 5 is a cross-sectional view seen from the direction V-V in FIG.
FIG. 6 is a front view showing the entire bending system according to the present invention.
FIG. 7 is a plan view showing a Y-axis station.
8 is a side view seen from the direction VIII in FIG. 7. FIG.
9 is a cross-sectional view taken along line IX-IX in FIG.
FIGS. 10A and 10B are a front view and a side view showing a mold station, respectively.
FIG. 11 is an enlarged view showing an attachment portion of a long punch to a mold station.
FIG. 12 is a side view showing a moving mechanism of the die station.
FIG. 13 is a front view showing a die station.
FIG. 14 is an explanatory view showing a state in which a die in the die station is attached to the mold station.
FIG. 15 is a front view showing an attachment portion for attaching the mold station to the Y-axis station.
FIG. 16 is a front view showing a short punch storage unit.
FIG. 17 is a side view seen from the XVII direction in FIG.
18 is a plan view seen from the XVIII direction in FIG.
FIG. 19 is a front view showing a short ALC.
20 is a plan view seen from the XX direction in FIG.
FIG. 21 is an enlarged view showing a mounting portion of a short punch for a die station.
22A and 22B are a plan view and a front view showing a long ALC.
FIG. 23 is a plan view showing an X-axis direction moving mechanism in a long ALC.
24 is a cross-sectional view taken along line XXIV-XXIV in FIG.
FIG. 25 is a cross-sectional view showing a mold conveying device.
FIG. 26 is a plan view showing a mold clamping device.
FIG. 27 is an explanatory view showing a conventional method for adjusting the punch length.
[Explanation of symbols]
1 Mold storage device
3 Bending system
5 Press brake (bending machine)
7 Handling robot
11 Plate material loading device
13 Loading / unloading robot
37 Y-axis station
49 Mold Station
95 Die Station
121 Short punch storage
135 Short ALC
199 Long ALC
237 Mold transfer device
P punch, long punch
D die
PS short punch

Claims (5)

A mold exchanging method in a bending machine for bending a plate material in cooperation with a punch and a die, comprising the following steps.
(1) A first long punch group formed by combining long punches having a width of 100 mm and a second long punch group formed by combining long punches having a width of 200 mm are movably provided. Between the long punch group and the second long punch group, there is provided a space in which a short punch group formed by combining short punches having a width of 50 mm, 15 mm or 10 mm can be mounted movably and a die can be mounted. Selecting a mold station having a desired long punch group from a plurality of mold stations;
(2) A step of selecting a die corresponding to the combined length of the desired long punch group and the short punch group selected in the step (1) from a die station storing a plurality of dies ,
(3) A step of mounting the die selected in the step (2) on the mold station ;
(4) A step of creating a short punch having a desired length by combining the short punches ;
(5) A punch having a desired length is produced by combining the first and second long punch groups in the step (1) and the short punch having a desired length in the step (4) in the mold station. The process of
(6) A step of conveying the mold station of the step (5) to a bending machine , Wherein the step (4), have a plurality kinds of selecting a desired short punches length from the short punches storage unit that stores a short punch, step of adhering the selected short punches so that no gaps The method for exchanging dies in a bending machine according to claim 1, wherein: In the step (5), the short punch produced in the step (4) is mounted between the first long punch group and the second long punch group mounted on the mold station. 2. The bending machine according to claim 1, further comprising a step of bringing the first long punch group, the second long punch group, and the short punch close to each other and closely contacting each other. Mold replacement method . A mold storage apparatus in a bending machine for bending a plate material by cooperation of a punch and a die, a first long punch group formed by combining long punches having a width of 100 mm, and a long member having a width of 200 mm A second long punch group comprising a combination of punches is provided so as to be able to approach and separate from each other, and a width of 50 mm, 15 mm or 10 mm is provided between the first long punch group and the second long punch group. A plurality of molds having a space in which a short punch group formed by combining the short punches can be mounted, and a die can be mounted at the same core position below the first and second long punch groups and the short punch group A plurality of short punch storages including a station, a Y axis station that transports a mold station selected from the plurality of mold stations in the Y axis direction, and a plurality of short punches. And a short automatic length in which the plurality of short punches selected in the short punch storage unit are closely contacted with each other without gaps and the contacted short punches are mounted on the mold station conveyed by the Y-axis station. A changer, a long automatic length changer that closely contacts the first long punch group, the second long punch group, and the short punch mounted on the mold station without any gaps, and the first long length A die conveyance device that comprises a punch group, the second long punch group, and the short punch group, and a die conveying device that conveys the die station having a corresponding die to a bending machine. Mold storage device for bending machine . 5. The bending according to claim 4, wherein a die storage device having a die station having a plurality of types of dies for mounting on the die station is provided adjacent to the bending machine. Mold storage device for processing machines .

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