JP2611097B2 - 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 a mold (punch, die) mounted on a turret (upper turret, lower turret) in a turret punch press, and a mold housed in a stocker arranged near the turret punch press. The present invention relates to an automatic mold changing apparatus for exchanging a mold.

[0002]

2. Description of the Related Art A conventional automatic die changing apparatus will be briefly described.

A moving body is provided between the turret and the stocker in the turret punch press, and the moving body is movable between a position close to the turret and a position close to the stocker. The movable body has an upper arm and a lower arm provided vertically. A punch holder exchange hand is provided on the upper arm, and this punch exchange hand is for attaching and detaching a punch holder having a punch to and from an upper turret or stocker in a horizontal direction. A die holder exchange hand is provided on the lower arm, and the die holder exchange hand attaches and detaches a die holder provided with a die to and from a lower turret or stocker in a horizontal direction.

[0004]

By the way, in the conventional automatic die changing apparatus, a die holder (punch and die holder) provided with a die (punch and die) is operated by a punch holder exchanging hand and a die holder exchanging hand. The holding force increases the load acting on the punch holder exchange hand and the die holder exchange hand, and the movement of the moving body causes the punch holder exchange hand and the die holder exchange hand to move between the position close to the turret and the position close to the stocker. In this case, there is a problem in that the time for moving is increased, and the time required for exchanging the mold is increased, resulting in a decrease in work efficiency.

[0005]

As described above, in order to solve the conventional problems, in the present invention, a mold (punch, die) mounted on a turret (upper turret, lower turret) in a turret punch press. In a die automatic exchanging device for exchanging a die stored in a stocker arranged near the turret punch press, a movable body rotatable around a vertical axis and vertically movable between the turret and the stocker is provided. An upper support arm and a lower support arm are provided vertically on the movable body, and the upper support arm is configured to be able to move up and down with respect to the movable body, and a gripper for gripping a punch is provided at a tip end of the upper support arm. A punch exchange hand provided with a die exchange hand is provided at the tip of the lower support arm, and the die exchange hand temporarily supports the die. B) Transferring the holder that horizontally pulls out the die holder holding the die from the lower turret or the stocker above the die support part and horizontally sends the die support part from the upper side to the lower turret or the stocker. An apparatus, a press-down cylinder that presses down the die after the die holder is positioned above the die support to release the die from the die holder, and pushes up the die after the die is supported by the die support. And a push-up cylinder mounted on the die holder.

[0006]

With the above arrangement, the upper turret and the lower turret are rotated to position a predetermined punch mounting station and a predetermined die mounting station in the mold changing area. Further, the moving body is rotated about a vertical axis to bring the punch exchange hand and the die exchange hand close to the turret.

[0007] A mold (punch, die) is detached from and mounted on the turret (upper turret, lower turret) as follows.

When a predetermined punch and a predetermined die are mounted on a predetermined punch mounting station and a predetermined die mounting station, the punch replacement hand is lowered with respect to the moving body together with the upper support arm to change the punch. A predetermined punch is gripped by gripping claws of the hand. Then, the punch exchanging hand is raised with respect to the moving body together with the upper support arm to lift a predetermined punch and to remove the punch from a predetermined punch mounting station. Thus, the work of detaching the predetermined punch from the upper turret by the punch exchange hand is completed.

While a predetermined punch is being separated from the upper turret by the punch changing hand, a predetermined die is separated from the lower turret by the die changing hand as follows. That is, a die holder provided with a predetermined die is horizontally pulled out from the lower turret to the upper side of the die supporting portion by the holder transfer device. Next, a predetermined die is pressed down by a pressing cylinder, detached from the die holder, and supported by the die supporting portion. Then, the die holder is horizontally sent out from the upper side of the die supporting portion to the lower turret by the holder transfer device. Thus, the operation of separating the predetermined die from the lower turret by the die exchange hand is completed.

When the predetermined punch mounting station and the predetermined die mounting station are empty, the punch exchanging hand is held together with the upper support arm while the predetermined punch is gripped by the gripping claws of the punch exchanging hand. By lowering the moving body, a predetermined punch is mounted on an empty predetermined punch mounting station. Then, the gripping state of the gripping claws is released, and the punch exchange hand is raised with respect to the moving body together with the upper support arm. by this,
The work of mounting the punch on the upper turret by the punch exchange hand is completed.

While the punch replacement hand is performing the work of mounting the punch on the upper turret, the die replacement hand is performing the work of mounting the die on the lower turret as follows. That is, while a predetermined die is supported by the die support, an empty die holder is pulled out horizontally from the lower turret to the upper side of the die support by the holder transfer device. Next, a predetermined die is pushed up by a push-up cylinder, detached from the die support, and mounted on a predetermined die holder. Then, the predetermined die holder is horizontally sent out from the upper side of the die supporting portion to the lower turret by the holder transfer device. Thereby, the work of attaching the die to the lower turret by the die exchange hand can be performed.

After the moving body is rotated about the vertical axis to bring the punch exchanging hand and the die exchanging hand close to the stocker, the mold (punch, die) is separated from the turret (upper turret, lower turret). In the same manner as the detachment operation, the mold is detached from the stocker and the detachment operation is performed. Here, since the movable body can be moved up and down, the punch exchanging hand and the die exchanging hand can be positioned at a height position corresponding to the storage section of the stocker.

As described above, the moving body is rotated about the vertical axis, and the punch exchanging hand and the die exchanging hand are turned horizontally between a position close to the turret and a position close to the stocker. By removing and attaching the mold to and from the turret and the stocker, the mold attached to the turret and the mold stored in the stocker can be exchanged. Here, while the punch exchanging hand and the die exchanging hand are horizontally turned between the position close to the turret and the position close to the stocker, the punch exchanging hand and the die exchanging hand are connected to the mold holder (punch holder). , Die holder)
, But only the mold (punch, die) is held.

[0014]

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 has a portal-shaped frame 3, on which a rotatable upper and lower turrets 5, 7 are supported. Punches P and dies D are mounted on a plurality of punch and die mounting stations in the upper and lower turrets 5 and 7 via a punch holder and a die holder.

The upper and lower turrets 5 and 7 are provided with a machining position 9 and a mold exchange area 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, 7, and a front side table is provided on both sides of the center table 13.
The rear side table 15 is arranged so as to be movable in the Y-axis direction (in FIG. 1, diagonally right and left 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 is moved to the X position.
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 holders 23 supporting exchange punches and dies is arranged. In this stocker 25, a stocker base 31 is rotatably mounted on a support 29 erected in a U-shaped frame 27.
A plurality of the holders 23 are housed on one.

Between the stocker 25 and the mold changing area 11 of the turret punch press 1, there is provided a moving device 35 which is a part of an automatic mold changing device 33 which can reciprocate in the Y-axis direction. . The moving device 35 is provided with the stocker 2
5 are provided on the top and bottom of the U-shaped frame 27 provided with
A guide member 37 extending in the axial direction is provided, and upper and lower ends of a column 39 are mounted on the guide member 37 via an LM guide (not shown) or the like, and are movable in the Y-axis direction by a driving member. ing. A punch exchanging hand 41 and a die exchanging hand 43 provided integrally with the support column 39 are mounted so as to be freely rotatable and vertically movable.

As shown in FIG. 6, the stocker 25 has a column 29 provided on a frame 45 provided in the frame 27 so as to be rotatable.
9, a disc-shaped stocker base 31 is mounted in two upper and lower stages. A holder 23 having a punch P and a die D is radially disposed above and below the stocker base 31.

The driving system of the column 29 includes a column 29
For example, a gear portion is provided as a rotation transmission member 47 at the lower end of the support rod 29, and the support 29 is rotatable from the output shaft of the electric motor 49 via the rotation transmission member 47.

When the electric motor 49 is driven, the column 29 rotates through the rotation transmitting member 47 to rotate the stocker base 31 so that the holder 23 having the punch P and the die D to be replaced is positioned at a predetermined position. Can be positioned.

As shown in FIG. 2, the moving device 35 constituting the automatic die changing device 33 is provided at the tip of a frame 27 provided with the stocker 25. A guide member 37 extending in the Y-axis direction (a direction orthogonal to the drawing in FIG. 2) is provided in the portion.

A rail 51 such as an LM guide is provided on the guide member 37, and an LM guide 53 slidably engaged with the rail 51 is mounted on the rail 51, and the LM guide 53 is fixed to a bracket 55. The bracket 55 is provided with bearings 57, 59 for supporting both shafts of a cylindrical shaft 39 </ b> B provided on a central shaft 39 </ b> A constituting the support column 39, and a bearing 61 is mounted on the bearing 59. The center shaft 39A is rotatable via the. The bearing 57 supports the cylindrical shaft 39B,
Although not shown, a spline groove and a spiral groove are formed on the outer periphery of the circumferential shaft 39B.

Further, a support plate 65 for supporting the rack 63 is provided on the guide member 37 so as to extend. Pinions 67 meshing with the rack 63 are provided at both ends of the center shaft 39A. Although not shown, a drive motor is provided via a rotation transmission member.

With the above configuration, when the drive motor is driven, the pinion 67 is rotated via the rotation transmitting member, and the pinion 67 is moved on the rack 63 in the Y-axis direction.

That is, the column 39 can smoothly move in the Y-axis direction via the LM guide 53, and the pinion 67 meshes with the racks 67 provided above and below.
Can be shifted in a straight state at all times.

A moving block 69 supporting the punch exchanging hand 41 and the die exchanging hand 43 is engaged with the cylindrical shaft 39B of the column 39 in which the spline groove and the spiral groove are formed. The moving block 69 connects a lifting block 71 formed with a lifting screw (not shown) and a turning block 73 formed with a spline (not shown) to a connecting cylinder 75.
And are integrally configured.

Referring also to FIG. 3, a large pulley 77 is fixed to the elevating block 71, and an elevating electric motor 81 is suspended from a supporting arm 79 protruding from the connecting cylinder 75.
A small pulley 83 is fixed to the output shaft of the electric motor 81 for lifting, and a timing belt 85 is wound around the small pulley 83 and the large pulley 77, for example.

A large pulley 87 is fixed to the turning block 73, a turning motor 91 is erected on a support arm 89 protruding from the connecting cylinder 75, and a small pulley 93 is fixed to the output shaft of the turning motor 91. For example, a timing belt 95 is wound around the small pulley 93 and the large pulley 87.

With the above configuration, when the motor 81 is driven, the block 71 is rotated via the small pulley 83, the timing belt 85, and the large pulley 77, and is fixed to the column 39 by the screw formed on the block 71. On the other hand, the moving block 69 is moved up and down. When the turning electric motor 91 is driven, the small pulley 9 is driven.
3, the turning block 73 rotates via the timing belt 95 and the large pulley 87, and the turning block 73 and the support 3
The moving block 69 is pivoted because it is engaged with the cylindrical shaft 39B of No. 9 by a spline groove.

A punch exchange hand 41 and a die exchange hand 43 are provided on the connecting cylinder 75 of the moving block 69. This will be described in more detail with reference to an enlarged view shown in FIG.

The punch replacement hand 41 is mounted on a base 97 provided integrally with the connecting cylinder 75, and bearings 99, 101 are provided on the upper and lower sides, and the bearings 103, 105 mounted on the bearings 99, 101 are provided. A screw rod 109, which is a member of the driving member 107, is mounted via the. On the other hand, a nut member 113 is provided on the upper support arm 111 that supports the punch exchange hand 41, and the nut member 113 is screwed to the screw rod 109. The upper support arm 111 is guided by a guide groove 115 formed in the base 97 and is vertically movable.

To move the upper support arm 111 up and down, a pulley 117 is fixed to the lower end of the screw rod 109, and a drive motor (not shown) is provided via a belt or the like wound around the pulley 117. Have been.

With the above configuration, a driving motor (not shown) is driven, and the pulley 117 is rotated, so that the screw rod 1
09 rotates, and the upper support arm 111 is moved up and down via the nut member 113 screwed into the screw rod 109. At this time, since the upper support arm 111 is guided by the guide groove 115 so as not to swing laterally, it can be moved up and down smoothly.

A movable plate 119 is engaged with the upper support arm 111 by, for example, a dovetail groove, and is mounted so as to be able to move forward and backward. The movable plate 119 is mounted on a bracket 121 erected on the movable plate 119 and on the upper support arm 111. The piston rod 125 of the provided hydraulic cylinder 123 is connected.

A support member 127 is provided on the movable plate 119.
, A gripping claw supporting plate 129 is provided, and the gripping claw supporting plate 129 is movable by a minute amount. Further, a lock device 131 for fixing the movable plate 119 and the gripping claw support plate 129 is provided.

The above-mentioned support member 127 and the lock device 13
As shown in FIG. 4, a plurality of (four in this embodiment) head-mounted pins 133 are attached to the movable plate 119.
And the gripping claw support plate 129 is provided therethrough. A collar 135 is provided at a lower end of the head-mounted pin 133 so as to be adjustable in position by a set bolt 137.
Further, the movable plate 119 and the gripper supporting plate 12
9, a rolling member 139 fitted to the head pin 133 is mounted between the gripping claw support plate 129 and the collar 135. The rolling member 139 is, for example, a steel ball. It consists of upper and lower rings 143 sandwiching 141.

With the above configuration, the gripping claw supporting plate 1
29, the movable plate 119 is mounted via the headed pin 133, so that there is play between the headed pin 133 and the gripping claw support plate 129, the movable plate 119, or the headed pin 133 and the rolling member. 139 rings 143
With this play, the punch P can be used to hold the punch P in the upper turret 5 and the stocker 25.
When pulling out from 3, the straightness can be absorbed and can be replaced smoothly.

The lock device 131 is provided vertically on the lower surface of the gripping claw support plate 129 and is provided with a fluid-operated cylinder 145.
The piston rod 14 of the cylinder 145 is provided.
7 is guided by a bush 149 mounted on the gripping claw support plate 129, and is configured to fit into the inner diameter of the bush 151 mounted on the movable plate 119.
Note that a tapered portion 153 is formed at the tip of the piston rod 147 to facilitate insertion of the piston rod 147 into the bush 151.

When the cylinder 145 of the lock device 131 is operated by the above configuration, the piston rod 147 is inserted into the bush 151 provided on the movable plate 119, and the movable plate 119 is
Is locked. When the lock device 131 is operated, the punch P is inserted into the upper turret 5 or the punch P is inserted into the holder 23 of the stocker 25. Since the lock is performed without looseness, accurate insertion is performed. .

Referring again to FIG. 3, the tip of the gripping claw support plate 129 has a gripping claw 1 for gripping the punch P.
55 are provided, and the gripping claws 155 are provided opposite to each other by forming a V-groove in an inward direction although not shown. A driving member 157 is provided for bringing the gripping claws 155 into a gripping state or an open state. The driving member 157 has a known configuration and is not shown, but is constituted by, for example, a rack, a pinion, or the like. A hydraulic cylinder 159 for driving the driving member 157 is fixed to the lower surface of the gripping claw supporting plate 129.

Further, a support plate 161 is fixed to the tip of the movable plate 119, and a vibration generator 163 such as an ultrasonic vibrator is attached to the support plate 161 for the punch P gripped by the gripping claws 155. It is suspended on the center line.

With the above configuration, when the punch P mounted on the upper turret 5 of the turret punch press 1 or the punch P stored in the stocker 25 is replaced by the punch replacement hand 41, the punch P is provided on the moving block 69. The lifting motor 81 and the turning motor 91 are appropriately driven, and the driving member 107 is driven to position the gripping claw 155 at a position where the desired punch P can be gripped. Then, the cylinder 123 is operated to operate the piston rod 125.
And the movable plate 119 is advanced. That is, the gripper 155 moves forward, and the gripper 155
When the position is at a position where the punch P can be gripped, the cylinder 159 is operated, and the punch P is gripped via the drive member 157 with the gripping claws 155 held.

When the punch P is gripped by the gripping claws 155, the driving member 107 is driven to raise the punch replacement hand 41, and the punch P is pulled out from the upper turret 5 or the stocker 25. At this time, the punch P can be easily pulled out by operating the vibration generator 163 to apply vibration to the punch P.

To release the gripping claws 155 from the punch P, the gripping can be released by performing the above operation in reverse. That is, when the cylinder 159 is operated to open the gripping claws 155 via the driving member 157, and the cylinder 123 is operated to retract the piston rod 125, the gripping claw support plate 129 supporting the gripping claws 155 is movable. The gripping claw 155 is separated from the punch P because it is pulled in together with the plate 119.

On the other hand, the mounting structure of the die exchange hand 43 is as follows.
A lower support arm 165 that supports the die exchanging hand 43 protrudes from a base 97 provided integrally with the connecting cylinder 75, and a movable plate 167 is provided on the lower support arm 165 via, for example, a dovetail groove. Bracket 169 mounted on movable plate 167 so as to be able to move forward and backward freely
The piston rod 173 of the hydraulic cylinder 171 provided on the lower support arm 165 is connected to the lower support arm 165.

The movable plate 167 is provided with a support member 127.
And a die attaching / detaching member supporting bracket 175 is provided, and the die attaching / detaching member supporting bracket 175 is movable by a minute amount. Further, a lock device 131 for fixing the movable plate 167 and the bracket 175 for supporting the die attaching / detaching member is provided. Note that the support member 127 and the lock device 131 have exactly the same structure as that employed in the punch exchange hand 41, and thus detailed description is omitted.

The bracket 175 for supporting the die attaching / detaching member.
The die holder 20 attached to the lower turret 7
5 and a holder transfer device 177 for pulling out the holder 23 attached to the stocker 25. The holder transfer device 177 is configured to move the input / output shaft 181 forward and backward by a cylinder 179 operated by fluid pressure. .

Further, the die D pulled out by the holder transfer device 177 or the die D mounted on the holder 23 is stored in the temporary holding portion 183 provided on the bracket 175 for supporting the die attaching / detaching member. Die attaching / detaching device 1 composed of a lowering cylinder 185 and a raising cylinder 187 on the upper and lower parts of the bracket 175
89 are provided.

More specifically, referring to FIG. 5, a temporary holding portion 183 for temporarily holding the die D is formed in the lower cylinder 187 in a die housing 191 also serving as a cylinder case. A piston 193 and a piston rod 195 provided integrally with the piston 193 are built in the die housing 191, and an end plate 197 is locked at a tip of the piston rod 195. Are vertically slidably mounted on the inner diameter of the hole 199 of the temporary holding portion 183.

The upper cylinder 185 has an end plate 20 at the end of a built-in piston rod 201.
3 are provided integrally. In addition, end plate 2
The outer diameter of 03 is slightly smaller than the outer diameter of the die D. Reference numeral 205 denotes a die holder.

With the above configuration, the turret punch press 1
In order to take out the die D from the lower turret 7, the die holder 205 provided with the die D to be exchanged is operated by operating the cylinder 179 of the holder transfer device 177, and the input / output shaft 181 is moved.
Withdraw. Then, the upper cylinder 185 serving as the die attaching / detaching device 189 is operated, the die D is pressed by the end plate 203, and the die D is mounted in the temporary holding portion 183 provided in the lower cylinder 187. Withdraw 201. In this state, the lifting / lowering motor 81 or the turning motor 91 provided on the moving block 69 to which the die exchanging hand 43 is mounted is appropriately driven, and the moving device 35 is driven to move the die exchanging hand 43 to the stocker 25 side. The die D is stored in a desired holder 23 by moving and positioning.

The die D is inserted into the holder 23 of the stocker 25.
The lower cylinder 187 is operated to push up the die D stored in the temporary holding section 183 by the end plate 197 and store the die D in the die mounting section of the holder 23.

Also, the die holder 205 of the lower turret 7
When the die D is mounted, or when the die D stored in the holder 23 of the stocker 25 is to be taken out, the above operation is reversed to enable the exchange of the die D.

The configuration of the automatic die changing apparatus 33 of this embodiment is summarized as follows. Exchange of the dies (punch P, die D) mounted on the turret (upper turret 5, lower turret 7) in the turret punch press 1 and the dies P, D stored in the stocker 25 arranged near the turret punch press 1. In the automatic die changing device 33 for performing the above, a moving block 69 rotatable around a vertical axis and movable up and down is provided between the turrets 3, 5 and the stocker 25, and the moving block 69 has an upper support arm 111 and a lower support arm. The upper support arm 111 is configured to be able to move up and down with respect to the moving block 69,
A punch exchange hand 41 provided with a gripper 155 for gripping the punch P is provided at the tip of the upper support arm 111, and a die exchange hand 43 is provided at the tip of the lower support arm 165. D is temporarily pulled out from the lower turret 7 or the stocker 25 to the upper side of the die supporting portion 183, and the lower portion of the turret is pulled out from the upper portion of the die supporting portion 183. 7 or a holder transfer device 177 for horizontally sending out to the stocker 25, and the die holder 20.
5 is positioned above the die supporting portion 183, and then the die D
And a push-up cylinder 187 that pushes the die D down and detaches it from the die holder 205, and a push-up cylinder 187 that pushes down the die D and attaches it to the die holder 205 after the die D is supported by the die support 183. And

The operation of this embodiment is summarized as follows.

By rotating the upper turret 5 and the lower turret 7, a predetermined punch mounting station and a predetermined die mounting station are positioned in the mold changing area 11. In addition, the moving block 69 is rotated about the vertical axis, and the punch exchanging hand 41 and the die exchanging hand 43 are rotated.
To the turrets 5 and 7.

Then, detaching and mounting of the mold (punch P, die D) with respect to the turret (upper turret 5, lower turret 7) are performed as follows.

When a predetermined punch P and a predetermined die D are mounted at a predetermined punch mounting station and a predetermined die mounting station, the punch exchange hand 41 is moved down with respect to the moving block 69 together with the upper support arm 111. Then, the predetermined punch P is gripped by the gripping claws 155 of the punch exchange hand 41. Then, the punch exchange hand 41 is moved together with the upper support arm 111 to the moving block 6.
9 to lift a predetermined punch P and remove it from a predetermined punch mounting station. Thus, the operation of detaching the punch P from the upper turret 5 by the punch exchange hand 41 is completed.

While a predetermined punch P is being separated from the upper turret 5 by the punch exchange hand 41, a die D is separated from the lower turret 7 by the die exchange hand 43 as follows. . That is, the die holder 205 holding the predetermined die D is horizontally pulled out from the lower turret 7 to the upper side of the die supporting portion 183 by the holder transfer device 177. Next, a predetermined die D is pressed down by the pressing cylinder 185 and detached from the die holder 205, and is supported by the die support portion 183. Then, the die holder 205 is moved to the die supporting unit 1 by the holder transfer device 177.
From the upper side of 83, it is sent horizontally to the lower turret 7. Thus, the detaching operation of the die D from the lower turret 7 by the die exchange hand 43 is completed.

When the predetermined punch mounting station and the predetermined die mounting station are empty, the punch exchanging hand 41 is held under a state where the predetermined punch P is gripped by the gripping claws 155 of the punch exchanging hand 41. By lowering the upper support arm 111 with respect to the moving block 69, a predetermined punch P is mounted on an empty predetermined punch mounting station. Then, the gripping state of the gripping claws 155 is released, and the punch exchange hand 41 is moved to the upper support arm 11.
1 together with the moving block 69. Thus, the work of mounting the punch P by the punch exchange hand 41 ends.

While the work of mounting the punch P on the upper turret 5 by the punch exchanging hand 41, the work of mounting the die D on the lower turret 7 by the die exchanging hand 43 is performed as follows. That is, while the predetermined die D is supported by the die support portion 183, the empty die holder 205 is horizontally pulled out from the lower turret 7 to the upper side of the die support portion 183 by the holder transfer device 177. next,
A predetermined die D is pushed up by a push-up cylinder 187,
It is detached from the die support part 183 and is held by a predetermined die holder 205. Then, the holder transfer device 177
As a result, a predetermined die holder 205 is horizontally sent out from the upper side of the die supporting portion 183 to the lower turret 7. by this,
The work of attaching the die D to the lower turret 7 by the die exchange hand 43 ends.

The punch block hand 41 and the die switch hand 43 are rotated close to the stocker 25 by rotating the moving block 69 about the vertical axis. The punch P and the die D are detached and mounted. Here, since the moving block 69 can be moved up and down,
The punch exchanging hand 41 and the die exchanging hand 43 can be positioned at a height corresponding to the storage section of the stocker 25.

As described above, the moving block is rotated about the vertical axis, and the punch exchanging hand 41 and the die exchanging hand 43 are moved closer to the turret (upper turret 5, lower turret 7) and closer to the stocker 25. Between the turrets 5 and 7 and the stocker 25, and a die (punch P, P).
By removing and attaching the die D), the dies P and D mounted on the turrets 5 and 7 and the dies P and D stored in the stocker 25 can be exchanged. here,
While the punch exchanging hand 41 and the die exchanging hand 43 are horizontally turned between the position close to the turrets 5 and 7 and the position close to the stocker 25, the punch exchanging hand 41 and the die exchanging hand 43 Without holding the mold holders (punch holder, die holder 205), only the dies P and D are held.

As described above, according to the present embodiment, the punch exchanging hand 41 has the gripping claws 155, and the die exchanging hand 43 includes the die supporting portion 183, the holder transfer device 177, the push-down cylinder 185, and the push-up cylinder. By providing the 187, the punch exchange hand 41 and the die exchange hand 43 are moved horizontally between a position close to the turrets 5 and 7 and a position close to the stocker 25 in order to exchange the dies P and D. It is sufficient to hold only the dies P and D without holding the die holders (punch holder and die holder 205) by the punch exchange hand 41 and the die exchange hand 43 during the turning movement in the direction. Therefore,
The load acting on the punch exchanging hand 41 and the die exchanging hand 43 is reduced, and the punch exchanging hand 41 and the die exchanging hand 43 are moved in a horizontal direction between a position close to the turrets 5 and 7 and a position close to the stocker 25. The time required for the turning movement can be shortened, and the effect of improving the working efficiency by shortening the mold changing time can be achieved.

The punch exchanging hand 41 has a gripper 155
The die exchanging hand 43 includes the die supporting portion 183, the holder transfer device 177, the push-down cylinder 185, and the push-up cylinder 187. During the detachment and the mounting work of the die D, the die exchange hand 43 can perform the detachment and the mounting work of the die D with respect to the lower turret 7 or the stocker 25, thereby further shortening the mold exchange time. , Work efficiency is further improved.

[0070]

The punch exchanging hand has a gripping claw, and the die exchanging hand has a die support, a holder transfer device, a press-down cylinder and a push-up cylinder. While turning the punch exchange hand and the die exchange hand horizontally between the position close to the turret and the position close to the stocker,
Without holding the mold holder (punch holder, die holder) by the punch exchange hand and die exchange hand
It is enough to hold only the mold (punch, die). Therefore, the load acting on the punch exchange hand and the die exchange hand is reduced, and the time required for turning the punch exchange hand and the die exchange hand in the horizontal direction between the position close to the turret and the position close to the stocker is shortened. Thus, it is possible to reduce the time required for exchanging the dies, thereby improving the working efficiency.

The punch exchanging hand has a gripping claw, and the die exchanging hand has a die supporting portion, a holder transfer device, a push-down cylinder, and a push-up cylinder. While performing the punch removal and mounting work, the die replacement hand can perform the die removal and mounting work on the lower turret or stocker, further shortening the mold replacement time and improving the work efficiency. It can be further improved.

[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 side sectional view showing a main part of the present invention and showing an example of an automatic die changing apparatus in the present embodiment.

FIG. 3 is an enlarged view of a part viewed from an arrow III in FIG. 2;

FIG. 4 is an enlarged cross-sectional view taken along the line IV in FIG. 3;

FIG. 5 is an enlarged sectional view of a portion viewed from an arrow V in FIG. 3;

FIG. 6 is a side view illustrating an example of a stocker according to the present embodiment.

[Explanation of symbols]

 Reference Signs List 1 Turret punch press 5 Upper turret 7 Lower turret 11 Mold exchange position 25 Stocker 33 Automatic mold exchange device 39 Support 41 Punch exchange hand 43 Die exchange hand 107 Driving member

Claims (1)

(57) [Claims] 1. A mold for exchanging a mold (punch, die) mounted on a turret (upper turret, lower turret) in a turret punch press and a mold housed in a stocker arranged near the turret punch press. In the automatic exchange device, a movable body rotatable and vertically movable around a vertical axis is provided between the turret and the stocker, and an upper support arm and a lower support arm are provided on the movable body vertically, and the upper support arm is provided. A punch exchange hand, which is configured to be able to move up and down with respect to the moving body, is provided with a gripper for gripping a punch at the tip of the upper support arm, and a die exchange hand is provided at the tip of the lower support arm. The die exchange hand includes a die supporting portion for temporarily supporting the die, and a die holder for holding the die, which is connected to the lower turret or the storage. A holder transfer device that horizontally pulls out the die support from the upper side of the die support and horizontally sends the die support to the lower turret or the stocker from above, and the die holder is positioned above the die support. A press-down cylinder that presses down a die to release the die from the die holder, and a press-up cylinder that presses up the die after the die is supported by the die supporting portion and mounts the die on the die holder. Automatic mold changer.