JP2773996B2 - Automatic mold changer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic die changing apparatus, and more particularly, to a die in a turret punch press for exchanging a punch and a die mounted on a lower turret above and below a turret punch press. The present invention relates to an automatic mold changing device.

[0002]

2. Description of the Related Art Conventionally, an automatic die changing device in a turret punch press has, for example, a tool holding portion when exchanging a punch and a die provided on the circumference of the upper and lower turrets of the turret punch press. With the mold arm,
It is known to exchange a punch holder and a die holder together with a punch and a die.

[0003]

By the way, in the above-mentioned conventional automatic mold exchanging apparatus, a punch holder and a die holder for exchanging a punch and a die are newly manufactured on the upper and lower turrets, and detached from the upper and lower turrets. Must be installed where possible. Therefore, in the existing turret punch press conventionally used, there is a problem that the punch and the die mounted on the upper and lower turrets cannot be replaced.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by exchanging only the punch and die mounted on the upper and lower turrets, eliminating the need to carry heavy objects of the punch holder and the die holder, and reducing the mold. An object of the present invention is to provide an automatic mold changing apparatus that shortens the changing time.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an apparatus for exchanging punches and dies in a turret punch press. A movable table that can reciprocate between stockers is provided, and the movable table is provided with a vertically movable detachable punch for the upper turret in the turret punch press and detachable punch for the mold holder provided in the stocker. And a die holder supported by a lower turret of the turret punch press and at least a part of the die holder supported by the stocker can be pulled out toward the moving side. The apparatus is provided on a die exchange hand provided on the moving table, and is pulled out to the moving table side. A die attaching / detaching device that presses the die held by the die holder and the mold holder from above and below and moves from the die holder and the mold holder to the temporary holding unit is provided on the die exchanging hand provided on the moving table, and the mold is automatically exchanged. The device was configured.

Further, in the present invention, an automatic die-changing apparatus is provided by providing a vibration generating device for giving a punch movement to the punch changing hand.

Further, according to the present invention, the die exchanging hand includes a plurality of die housings corresponding to the size of the die, and the punch exchanging hand constitutes a die automatic exchanging device for both the size of a bunch.

[0008]

By using the automatic die changing device of the present invention, a desired punch and die are set on the turret punch press, and a plurality of die holders supporting the replacement punch and die are mounted on the stocker. A reciprocating movable table is provided between the stocker and the turret punch press.

When exchanging the punch and the die mounted on the upper and lower turrets of the turret punch press, first, the punch and the die to be exchanged set in the turret punch press are indexed to the exchange position.

Next, the moving table is moved to a turret punch press changing position, the punch is gripped by a punch changing hand provided on the moving table, and the punch changing hand is shifted upward to pull out the punch from the upper turret. The die is pulled out of the upper holder provided with the die attached to the lower turret by a predetermined amount by the die changing hand access device provided on the movable base, and the die provided on the upper holder is moved by the operation of the cylinder which is the die attaching / detaching device. Is moved to the temporary holding section provided in the storage section, and stored in the temporary holding section.

Then, the moving table is moved to the stocker side,
It is positioned at a predetermined storage position, and the die holder stored in the stocker is drawn out by a predetermined amount by an access device provided in the die exchange hand. When the punch supported by the punch exchange hand is lowered and stored, the die stored in the temporary holding unit of the die exchange hand is moved from the temporary holding unit into the mold holder by operating the cylinder as a die attaching / detaching device. And store it.

To mount the punch and die stored in the stocker on the upper and lower turrets of the turret punch press,
Exchange is performed by reversing the above operation.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. Since the turret punch press has a known structure, detailed illustration and description are omitted.

Referring to FIG. 1, the turret punch press 1 includes a portal-shaped frame 3 on which upper and lower turrets 5 and 7 which are rotatable are supported. Pans P and dies D are mounted on the circumferences of the upper and lower turrets 5 and 7, respectively, at corresponding positions.

The upper and lower turrets 5 and 7 have a processing position 9 and a die changing position 11 for exchanging a punch P and a die D.
Is provided, and the frame 3 above the processing position 9 is provided.
In order to strike the punch P, a striker is provided so as to be vertically movable by a known driving device (not shown).

A center table 13 is fixedly arranged so as to surround the upper and lower turrets 5 and 7, and a front side table (not shown) and a rear side table 15 are provided on both sides of the center table 13 in the Y-axis direction. (In FIG. 1, oblique left and right directions). At the left end of the front and rear side tables 15 straddling the center table 13, a carriage base 17 extending in the X-axis direction and movable in the Y-axis direction is provided.

The carriage base 17 is provided with a carriage 19 which is movable in the X-axis direction. The carriage 19 is provided with a plurality of work clamps 21 for clamping a work W. The carriage base 17 and the carriage 19 are moved in the Y-axis direction and the X-axis direction by a well-known ball screw, servo motor, or the like (not shown), but detailed description of the configuration is omitted.

By moving the carriage base 17 together with the front and rear side tables 15 in the Y-axis direction and the carriage 19 in the X-axis direction, the work W clamped by the work clamp 21 can be moved in the X direction.
The workpiece W moves in the axis and Y-axis directions, and the desired position of the workpiece W is positioned at the processing position 9. The desired position of the work W is the processing position 9
When the upper and lower turrets 5 and 7 are rotated, the desired punch P and die D are indexed to the processing position 9 and
The punching process is performed at a desired position of the work W in cooperation with the punch P and the die D by the vertical movement of the striker.

In the vicinity of the frame 3 in the turret punch press 1, for example, on the right side in FIG. 1, a stocker 25 accommodating a plurality of mold holders 23 supporting exchange punches and dies is arranged. In the stocker 25, a stocker base 31 is rotatably mounted on a support 29 erected on a gantry 27, and a plurality of the mold holders 23 are stored on the stocker base 31.

Between the stocker 25 and the mold changing position 11 of the turret punch press 1, there is provided a moving table 35 which is a part of an automatic mold changing apparatus 33 which can reciprocate in the Y-axis direction. . A U-shaped support frame 37 constituting the moving table 35 is provided to extend in the Y-axis direction.
This support frame 37 is provided on the gantry 27, and as shown in FIG. 2, a drive shaft 39 is provided to extend in the Y-axis direction relative to the upper and lower horizontal portions of the support frame 37. . The support 41 is engaged with the drive shaft 39 provided above and below, and although not shown, the support 41 is movable in the Y-axis direction via the drive shaft 39 by a drive member. A punch exchange hand 43 and a die exchange hand 45 are provided on the support 41.
Are mounted so as to freely rotate and move up and down.

As shown in FIGS. 15, 16 and 17, the stocker 25 has a base 47 fixed on the pedestal 27, and the column 29 is rotatable via a bearing 49 on the base 47. It is erected. The stocker base 31 is locked to the upper end of the support 29, and a bracket 51 having a U-shaped cross section is provided radially in the circumferential direction on the upper surface of the stocker base 31. The mold holder 23 is mounted so as to be able to move in and out. In addition, the punch support 2 of the mold holder 23
Holes 53 and 55 through which the punch P is inserted and detached from the die support portion 23b are formed.

A pulley 57 is mounted on the lower end of the column 29, and a pulley 61 mounted on an output shaft of an electric motor 59 provided on a base 47, and a belt 6
3, and the rotation is transmitted. Although not shown, the mold holder 23 is provided with an insertion hole into which a hook portion that retreats back and forth by a cylinder provided in a die exchange hand 45 described later is inserted.

With the above configuration, when the electric motor 59 is driven, the pulley 61 rotates, and the pulley 57 rotates via the belt 63. Since the pulley 57 is fixed to the column 29, the column 29 rotates to rotate the stocker base 31, and the mold holder 23 having the punch P and the die D to be replaced can be positioned at a predetermined position. .

As shown in FIGS. 3 and 4, the moving table 35 constituting the automatic die changing device 33 is
The movable table 35 is provided adjacent to the turret punch press 1 and has a U-shaped support frame 37.
7. Although not shown, a drive shaft 39 is provided in the upper horizontal portion 37a and the lower horizontal portion 37b of the support frame 37 so as to extend in the Y-axis direction (a direction orthogonal to the drawings in FIGS. 3 and 4). The drive shaft 39 is, for example, a ball screw, and the upper and lower ends of a column 41 are screwed to the drive shaft 39. The drive shaft 39 is rotated by a drive source, for example, an electric motor (not shown). Thereby, the support 41 is moved and positioned in the Y-axis direction.

The support 41 has a spline groove 65 and a spiral groove 67 formed therein. (See FIG. 4) A block 71 supporting a punch arm 69 constituting the punch exchange hand 43 is engaged with the spline groove 65 and the spiral groove 67, and the die arm 7 constituting the die exchange hand 45.
3 is engaged with the block 75. The blocks 71 and 75 are provided with a rotation motor 77 and a lifting motor 79, respectively. For example, the rotation motor 77 is mounted on the upper side of the block 71, and the lifting motor 7 is mounted on the lower side.
9 is mounted, and a lifting motor 79
Is provided with a rotating electric motor 77 on the lower side.

To engage the spline groove 65 and the spiral groove 67 provided on the support column 41, a rotation transmitting member is provided between the support shaft 41 and the output shafts of the rotating motor 77 and the elevating motor 79. This configuration is already known, and its illustration and detailed description are omitted. For example, the rotation motor 77
By rotating the gear fitted in the spline groove 65 of the support column 41 through the gear portion, the punch exchange hand 43
Alternatively, the die exchange hand 45 can be turned. Also, the column 4 is moved from the lifting motor 79 via a gear portion.
By rotating the ball nut mounted on the first spiral groove 67, the punch exchange hand 43 or the die exchange hand 4
5 can be freely moved up and down.

A fixed arm 81 constituting a punch arm 69 is fixed to the block 71 with a bolt or the like, and a movable arm 83 is provided on the fixed arm 81 via a support member 85. The movable arm 83 is movable by a fine amount. It has become. Further, a lock device 87 for fixing the fixed arm 81 and the movable arm 83 is provided.

Further, a punch P is provided at the tip of the movable arm 83.
And a driving member 91 for holding the gripping claw 89 in the gripping state or opening the gripping claw 89. The hydraulic pressure-operated cylinder 9 serving as a driving source of the driving member 91 is provided.
3 is provided on the fixed arm 81. Further, a support plate 97 is fixed to the upper surface of a cover 95 for shielding the drive member 91, and the vibration transmission member 9 is attached to the support plate 97.
A vibration generator 103, such as an ultrasonic vibrator, composed of the vibration source 9 and the vibration source 101, is vertically provided on the center line of the punch P gripped by the gripping claw 89.

With the above configuration, when the punch exchange hand 43 replaces the punch mounted on the upper turret 5 of the turret punch press 1 or the punch P stored in the stocker 25, the rotation provided on the block 71 is performed. By driving the electric motor 77 and the elevating motor 79, the gripping claw 89 at the tip of the punch arm 69 is positioned at a position where the desired punch P can be gripped. Then, the mold holder 23 housed in the stocker 35 is drawn out to the position shown by a two-dot chain line in FIG. Cylinder 93
Is operated, the punch P is gripped by the gripping claw 89 via the driving member 91, and the lifting / lowering motor 79 is driven to drive the punch P
Is pulled upward. At this time, the vibration generator 103 is operated to apply vibration to the punch P, so that the punch P can be pulled out smoothly. The position indicated by the two-dot chain line in FIG.

When the punch P is mounted on the upper turret 5 or the mold holder 23 provided in the stocker 25, the punch P gripped by the gripping claw 89 at the tip of the punch arm 69 is moved to a desired punch mounting hole position. The rotation motor 77 and the lifting motor 79 are driven and positioned. Then, the punch motor 69 is driven to lower the punch arm 69. At this time, the vibration generator 103 is operated to apply vibration to the punch P, so that the punch P can be mounted smoothly.

The block 75 includes a die arm 7.
3 is fixed by bolts or the like, and a movable arm 107 is provided on the fixed arm 105 via a support member 85 which is the same member as that provided for the punch arm 69. It can be moved by a small amount. Further, a lock device 87 for fixing the fixed arm 105 and the movable arm 107 is provided.

Further, on the upper surface of the movable arm 107, a die holder mounted on the lower turret 7 (the structure will be described later).
And an access device 109 for pulling out the mold holder 23 mounted on the stocker 25. The access device 109 is provided with an access shaft 11 by a fluid-operated cylinder 111.
3 is made to move forward and backward. Further, the die D pulled out by the access device 109 or the die D mounted on the mold holder 23 is stored in the temporary holding portion 115 provided on the movable arm 107. Cylinder 117 and lower cylinder 119
Is provided. The die D accommodated in the temporary holding unit 115 is also mounted on the die holder or the mold holder 23 by the die attaching / detaching device 121.

According to the above configuration, when the die exchange hand 45 exchanges a die D provided in a die holder described later on which the lower turret 7 of the turret punch press 1 is mounted, or a die D stored in the stocker 25, , The motor 77 for rotation provided on the block 75 and the motor 7 for lifting and lowering
9 is driven. Then, the movable arm 1 of the die arm 73
07 is positioned at a draw-out position of the die holder 23 stored in the die holder or the stocker 25, and a predetermined amount of the input / output device 109 is provided.
By operating the cylinder 111, the die holder or the mold holder 23 is pulled out. The drawing position is a position indicated by a two-dot chain line in FIG. 3 or FIG.

When the die holder or the mold holder 23 is pulled out, the upper cylinder 117 is operated to push out the die D into the temporary holding portion 115 provided on the movable arm 107, and the take-out of the die D is completed.

The die D is placed in a die holder or a mold holder 2.
3, the temporary holding unit 1 of the movable arm 107
15 into the mounting hole of the die holder drawn out from the lower turret 7 or the die holder drawn out of the stocker base 31.
7 and the lifting / lowering motor 79 are driven for positioning. Then, the lower cylinder 119 provided on the movable arm 107 is operated to push up the die D housed in the temporary holding portion 115 toward the die holder or the mold holder 23 to complete the mounting.

Next, the punch arm 69 of the punch exchange hand 43 will be described in more detail.

Referring to FIGS. 5 to 8, this figure shows a state in which the punch P mounted on the upper turret 5 of the turret punch press 1 is replaced.

The movable arm 83 is mounted on the fixed arm 81 of the punch arm 69 via the support member 85.
As shown in detail in FIG. 6, the configuration of the support member 85 is such that a plurality of (four in this embodiment) headed pins 123 are provided through the movable arm 83 and the fixed arm 81. . A collar 125 is provided at the lower end of the headed pin 123 so as to be adjustable in position by a set bolt 127.
Further, between the movable arm 83 and the fixed arm 81, between the fixed arm 81 and the collar 125,
A rolling member 129 fitted to 23 is mounted, and this rolling member 129 is composed of, for example, upper and lower rings 133 sandwiching a hard sphere 131.

According to the above configuration, since the movable arm 83 is attached to the fixed arm 81 via the headed pin 123, the play between the headed pin 123 and the fixed arm 81, the movable arm 83, or the headed pin is performed. 123 and rolling member 12
Since the backlash with the ring 133 of FIG. 9 is provided, when the punch P is pulled out from the upper turret 5 and the mold holder 23 stored in the stocker 25, the straightness can be absorbed and smooth. Can be exchanged.

Further, a lock device 87 for fixing the fixed arm 81 and the movable arm 83 is provided. The lock device 87 is provided with a fluid-operated cylinder 135 vertically provided on the lower surface of the fixed arm 81, and a piston rod 137 of the cylinder 135 is guided by a bush 139 mounted on the fixed arm 81, and It is configured to fit into the inside diameter of the mounted bush 141. Note that a tapered portion 143 is formed at the tip of the piston rod 137 to facilitate insertion of the piston rod 137 into the bush 141.

With the above configuration, when the cylinder 135 of the lock device 87 is operated, the piston rod 137 is inserted into the bush 141 provided on the movable arm 83, and the movable arm 83 is locked with respect to the fixed arm 81. The lock device 87 is operated when the punch P is inserted into the upper turret 5 or when the punch P is inserted into the hole 53 of the mold holder 23 of the stocker 25. Insertion is performed.

Further, a punch P is provided at the tip of the movable arm 83.
Is provided, and the gripping claws 89 are formed to face each other, forming a V-shaped groove 145 in an inward direction as shown in FIG. A driving member 91 for driving the gripping claw 89 is provided with a hydraulic pressure operated cylinder 93 on the upper surface of the movable arm 83, and a joint 149 provided at the tip of a piston rod 147 of the cylinder 93 is connected to the rack plate 1.
A sliding plate 153 provided with 51 is provided in a horizontal state. The sliding plate 153 is provided with a guide plate 155.
a, 155b so that it can be moved forward and backward freely.

The rack plate 151 provided on the sliding plate 153
A pinion 157 that meshes with the tooth portion is locked to a shaft 159, and the shaft 159 is rotatably suspended from the movable arm 83 via bearings 161a and 161b. A pinion 163 is engaged with the shaft 159 below the pinion 157, and a rack plate 165 is engaged with the pinion 163. The rack plate 165 is provided opposite to the pinion 163. Rack plate 16
5 are fixed to the gripping claws 89, respectively. Each gripping claw 89 is provided so as to be able to expand and contract with the guide bar 167 as a guide (see FIG. 8).

With the above arrangement, when the cylinder 93 is operated to cause the piston rod 147 to protrude, for example, the sliding plate 15
3 moves forward, and the rack plate 151 also moves forward. Rack plate 15
The pinion 157 meshed by the forward movement of 1 rotates clockwise in FIG. The pinion 163 also rotates via the shaft 159 along with the rotation of the pinion 157, and the rack plate 165 meshed with the pinion 163 moves in the retracting direction in FIG. As shown by the two-dot chain line in the drawing, the punches P are gripped by the V-grooves 145 of the gripping claws 89 regardless of the diameter of the gripping portion of the punch P. be able to.

To release the gripping claws 89 from the punch P, the gripping can be released by reversing the above operation. That is, when the piston rod 147 of the cylinder 93 is retracted, the pinion 157 rotates counterclockwise in FIG. 7 due to the retraction of the rack plate 151, and the pinion 163 also rotates in the same direction via the shaft 159. By rotating the pinion 163 in the counterclockwise direction, the gripping claws 89 can move outward from each other via the rack plate 165 and separate the gripping claws 89 from the punch P.

A cover 95 for protecting the driving member 91 is provided, and a support plate 97 is fixed to the upper surface of the cover 95. The support plate 97 is provided with a vibration transmitting member 99 operated by a vibration source 101. For example, a vibration generator 103 such as an ultrasonic vibrator is mounted. As described above, when the punch P is attached to and detached from the upper turret 5 of the turret punch press 1 or when the punch P is attached to and detached from the mold holder 23 of the stocker 25, vibration is applied to the punch P as described above. It is provided for easy attachment and detachment.

Next, the die holder 169 mounted on the lower turret 7 of the turret punch press 1 will be described in detail.

Referring to FIG. 9, FIG. 10 and FIG.
A large number of die holder bases 171 are fixed radially around the circumference of the lower turret 7 with bolts 173, and a die holder 169 provided with a plurality of dies D on the die holder base 171 is mounted. A protruding holding portion 175 is formed on the tip side (left side in FIGS. 9 and 10) of the die holder 169, and a holding block 177 that engages with the holding portion 175 is fixed to the die holder base 171.

At the rear side of the die holder 169, a pin 179 for preventing floating is mounted, and this pin 179 is a projection formed on the die holder base 171 as an engaging portion 1
The die holder 169 is inserted into the lower part of the die 81 to prevent the die holder 169 from floating with respect to the die holder base 171. A cam 183 is rotatably mounted on the rear end side of the die holder 169, and an eccentric portion 185 of the cam 183 can be inserted into and removed from a groove 187 formed in the die holder base 171. The cam 183 is provided with a slit 189 that allows a part of a locking member provided at the tip of the access shaft 113 of the access device 109 of the die exchange hand 45 to be described later to engage and disengage.

Further, at the rear end side of the die holder 169, as shown in FIG.
93 are formed. Also, die holder base 171
An abutment surface 195 is formed on the rear end side, and the projection 197 of the die holder 169 contacts the abutment surface 195 for positioning. Note that reference numeral 199 denotes a lid, which is provided to facilitate processing. Reference numeral 201 denotes a hole in which the die D is mounted.

The operation of the above configuration will be described with reference to FIG.

FIG. 12A shows a die holder base 171.
The state at the time of pulling out the die holder 169 locked at
The locking state described above with reference to FIG. 10 is exactly the same. In this state, the T-shaped locking member 203 provided at the tip of the access shaft 113 of the access device 109 of the die exchange hand 45 described later is inserted into the insertion groove 191 provided in the die holder 169. At this time, the locking member 203 is also inserted into the slit 189 provided in the cam 183.

Next, as shown in FIG. 12 (B), the inserted access shaft 113 is rotated 90 ° to the left or right. By rotating the access shaft 113, the pin 205 provided on the locking member 203 enters the locking groove 193, and the eccentric portion 185 of the cam 183 is free from the groove 187.

In this state, as shown in FIG. 12C, the pin 205 provided on the locking member 203 is locked by the locking groove 193 by moving the access shaft 113 to the right in the drawing. The die holder 169
Can be projected from the die holder base 171 by a predetermined amount, and the die D is exchanged. The die holder 17
In order to lock the die holder 169 to 1, the above operation can be performed in reverse.

For this reason, conventionally, the fixing block was pressed and fixed to the die holder with bolts, and the die holder was fixed to the lower turret. Therefore, a tool was required. However, in this embodiment, the fixing and releasing can be performed with one touch. And a pressing portion 175 and a pin 179 are provided before and after the die holder 169,
Since the floating is prevented, the number of constituent members is small and the processing can be easily performed.

Further, the die arm 73 of the die exchange hand 45 will be described in detail.

Referring to FIGS. 13 and 14, this drawing shows a state in which the die D mounted on the lower turret 7 of the turret punch press 1 is replaced.

A movable arm 107 is mounted on a fixed arm 105 of a die arm 73 via a support member 85, and a lock device 8 for fixing the fixed arm 105 and the movable arm 107 is provided.
7 are provided. Since the configuration and operation of the lock device 87 and the support member 85 are exactly the same as those provided on the punch arm 69 of the punch exchange hand 43 described above, the same members are denoted by the same reference numerals. The description is omitted. The proximity switch indicated by reference numeral 207 detects that the lock device 87 has been operated and locked.

With the above structure, when the die D is extracted from the lower turret 7 and the mold holder 23 stored in the stocker 25 by the play of the support member 85, straightness can be absorbed and smooth. Can be exchanged.
Further, when the locking device 87 is operated, the die D is inserted into the lower turret 7 or the die D is inserted into the hole 55 of the mold holder 23 of the stocker 25. Insertion work is performed.

In the access device 109, a bearing block 209 is fixed to the upper surface of the movable arm 107, and the nut case 2 is attached to the bearing block 209 via a bearing 210.
11 is provided rotatably. This nut case 2
11, a spline nut 213 is integrally fitted with a key 214, and the access shaft 113 having a spline groove inserted into the spline nut 213 is attached. The tip of the access shaft 113 (left side in FIG. 13) Is connected to a T-shaped locking member 203, and a pin 205 protrudes from the distal end side of the locking member 203.

A rear end (right side in FIG. 13) of the access shaft 113 is connected to a support shaft 215, and a flange 217 is formed on one side of the support shaft 215, and a collar 219 is fixed to the other end by bolts 221. Have been. This color 219
A thrust bearing 225 is mounted between the flange 217 and the connecting plate 223, and the access shaft 113 is rotatably provided.

The other end of the connecting plate 223 is provided with, for example, a hydraulically operated cylinder 111 on a support plate 227 fixed to the upper surface of the bearing block 209, and is engaged with a tip of a piston rod 229 of the cylinder 111. It is connected to the joining member 231. A plurality (two in this embodiment) of guide rods 233 guided by the connection plate 223 are attached to a bracket 235 erected at an end of the movable arm 107 and a bracket 237 suspended from a side surface of the cylinder 111. It is supported and laid down.
The connecting plate 223 is provided with a sliding member 239, and the sliding member 239 moves while sliding on the guide rod 233, so that the connecting plate 223 can move smoothly.

When the cylinder 111 is operated and the piston rod 229 is made to protrude by the above configuration, the input / output shaft 113 having the spline groove via the connecting plate 223
It moves to the position shown by the solid line in FIG. That is, the die holder 169 is fixed to the die holder base 171 by the pin 205 provided on the locking member 203 provided at the tip of the access shaft 113.
A more predetermined amount can be withdrawn. Also, the die holder 16
9 can be set to the old position by operating the cylinder 111 and retracting the piston rod 229.

The access device 109 is provided with a rotation device 241. The rotating device 241 is provided with a pulley 243 integrally provided on the side surface of the nut case 211, and the output shaft 2 of the electric motor 247 fixed to the pulley 243 and a bracket 245 locked on the side surface of the bearing block 209.
The chain belt 25 is attached to the pulley 251
3 is hung. (See FIG. 14)
When the electric motor 247 is driven, the rotation is transmitted to the nut case 211 via the pulley 251, the chain belt 253, and the pulley 243, and the rotation of the nut case 211 is controlled by the key 21.
At 4, the spline nut 213 provided integrally is turned.
When the spline nut 213 rotates, the shaft 1 engaged with the shaft 1
13 rotates, and rotates the pin 205 provided on the locking member 203 provided on the access shaft 113 by a predetermined angle. Then, as described above, the output shaft 1 is
13 can be freely engaged and disengaged.

A lower cylinder 119 constituting the die attaching / detaching device 121 is vertically provided at the tip (left side in FIG. 13) of the movable arm 107. This lower cylinder 119
Is formed with a temporary holding portion 115 for temporarily holding the die D in a die housing 255 also serving as a cylinder case.
The piston 257 is provided in the die housing 255,
The piston rod 2 provided integrally with the piston 257
The end plate 261 is fixed to the tip of the piston rod 259, and the outer periphery of the end plate 261 is vertically slidably mounted on the inner diameter of the hole 263 of the temporary holding portion 115.

An upper cylinder 117 constituting the die attaching / detaching device 121 is provided upright at the tip (left side in FIG. 13) of the support plate 227. The upper cylinder 117 has an end plate 267 integrally provided at the tip of a built-in piston rod 265. The outer diameter of the end plate 267 is formed slightly smaller than the outer diameter of the die D.

When the die holder 169 is pulled out from the lower turret 7 of the turret punch press 1, the block 26 is positioned on the tip end side of the bearing block 209 for positioning.
9 are provided, and the positioning pins 2
71 are provided in the horizontal direction.

With the above configuration, the above-described access device 109
The die holder base 17 provided on the lower turret 7 of the turret punch press 1 by the operation of the rotating device 241
1, the die holder 169 having the die D to be replaced is brought into contact with the pullout positioning pin 271, and after positioning, the upper cylinder 117 which is the die attaching / detaching device 121 is operated, and the die D is pressed by the end plate 267 and the lower portion is pressed. The die D is mounted in the temporary holding unit 115 provided in the cylinder 119. In this state, the die arm 73 of the die exchange hand 45 is rotated, and the movable table 35 is moved to the stocker 25 side, and the die D is stored in a desired mold holder 23.

FIG. 4 shows a state in which the die D is mounted on the mold holder 23 of the stocker 25. To mount the die D, the lower cylinder 119 is operated, and the die D is stored in the temporary holding portion 115 by the end plate 261. The die D is pushed up and stored in the die mounting hole 55 of the mold holder 23.

The die holder 169 of the lower turret 7
When the die D held on the die arm 73 is mounted, or when the die D stored in the mold holder 23 of the stocker 25 is mounted on the die arm 73 side, the above-described operation is performed in reverse. Can be exchanged.

FIG. 18 shows another embodiment of the die exchanging hand 45, and the same members are denoted by the same reference numerals and description thereof will be omitted.

This die exchange hand 45 is a die arm 2
73 is a V-shape, and two die arms 273 are provided. Die housings 275 and 277 provided in each die arm 273 can accommodate dies D having different outer diameters. Then, in order to set the desired die D mounted on the die arm 273 to the replacement position, the rotation motor 77 and the elevating motor 79 are driven to perform positioning at a predetermined position. Therefore, two types of dies can be exchanged at the same time. Also, die housing 275,2
If the dies D having the same diameter can be accommodated in the 77, it is possible to shorten the time of replacing the dies.

With the configuration as described above, the punch P and the die D mounted on the upper and lower turrets 5 and 7 and the punch P and the die mounted on the mold holder 23 stored in the stocker base 31 of the stocker 25 are used. The exchange with the die D can be performed in a short time by the automatic mold exchanging device 33. Moreover, by using the automatic die changing device 33 of the present embodiment, only the punch P and the die D are taken out and replaced, so that there is no method of taking out and replacing the die holder provided with the punch P and the die D as in the prior art. The replacement device itself can be reduced in weight without carrying heavy objects.

Further, by providing the vibration generating device 103 in the punch exchanging hand 43, when the punch P is stored in or taken out of the upper turret 5 or the mold holder 23 of the stocker 25, smooth mounting and dismounting can be performed. Can be planned. Further, since the die exchange hand 45 has two forks and accommodates a plurality of dies D, the exchange time can be reduced.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. For example, although the present embodiment has been described on the side where both the punch P and the die D are exchanged, it is also possible to exchange only the punch P or the die D.

Although the die exchanging hand 45 has been described as having two forks, the punch exchanging hand 43 and two forks can be used to shorten the punch exchanging time. Although the proximity limit and the limit switch are not shown in the movement limit to the upper limit, the lower limit, the lower limit and the rotation limit, naturally, these detectors are provided,
Fully automatic operation is possible.

[0077]

As will be understood from the above description of the embodiment, according to the present invention, since the structure is as described in the claims, a die holder having a punch and a die as in the prior art Since the bunch and die are removed and replaced instead of being removed and replaced, there is no need to carry a heavy object, so that the replacement time can be reduced and the device can be reduced in weight.

Further, by applying vibration to the punch when the punch is replaced by the vibration generating device, the punch can be smoothly mounted and detached. Further, since the punch exchange hand and the die exchange hand used for exchanging punches and dies are configured to be able to hold the punch or die regardless of the size of the die, the die exchange can be performed in a short time.

[Brief description of the drawings]

FIG. 1 is a perspective view in which an automatic mold exchanging device is provided between a turret punch press and a stocker so as to be reciprocally movable.

FIG. 2 is a perspective view showing a main part of the present invention and showing an example of an automatic die changing apparatus and a stocker in the present embodiment.

FIG. 3 is a side view of the automatic die changing apparatus.

FIG. 4 is an enlarged view of a portion viewed from an arrow IV in FIG. 3;

FIG. 5 is a side view showing a punch exchange hand.

FIG. 6 is a partial sectional view of FIG.

FIG. 7 is a plan view of FIG.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a plan view showing a die holder in a lower turret.

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 is a side view as viewed from the right side in FIG. 9;

FIG. 12 is an operation explanatory view when the die holder is pulled out from the die holder.

FIG. 13 shows a die exchange hand, and shows XIV in FIG.
It is sectional drawing along the -XIV line.

FIG. 14 is a plan view of FIG.

FIG. 15 is a plan view of the stocker.

FIG. 16 is a sectional view taken along line XVI-XVI in FIG.

FIG. 17 is a sectional view taken along the line XVII-XVII in FIG. 16;

FIG. 18 is a plan view showing another embodiment of the die exchange hand.

[Explanation of symbols]

 Reference Signs List 1 turret punch press 5 upper turret 7 lower turret 11 mold exchange position 23 mold holder 25 stocker 33 automatic mold exchange device 35 moving table 43 punch exchange hand 45 die exchange hand 103 vibration generator 109 entry / exit device 115 temporary holding unit 121 Die attaching / detaching device 169 Die holder 257 Die housing 277 Die housing

Claims (3)

(57) [Claims] 1. A punch in a turret punch press,
An apparatus for exchanging dies is provided with a movable table that can reciprocate between a mold exchange position of the turret punch press and a stocker that supports a plurality of punches and dies.
A punch exchange hand is provided for vertically attaching and detaching a punch to and from the upper turret in the turret punch press and a punch to and from a mold holder provided in the stocker. A die holder capable of pulling out at least a part of the mold holder supported by the stocker to the movable table side and a die holder access device are provided on a die exchange hand provided on the movable table and pulled out to the movable table side. And a die attaching / detaching device for pressing the die held by the die holder and the die holder from above and below to move the die holder and the die holder to the temporary holding portion from the die holder. An automatic die changing device. 2. The automatic die-changing device according to claim 1, wherein the punch-exchanging hand is provided with a vibration generator for applying vibration to the punch. 3. The die according to claim 1, wherein the die exchange hand has a plurality of die housings corresponding to the size of the die, and the punch exchange hand is also used for the size of the punch. Automatic exchange device.