JPH0576960A - Stocker for punch and die - Google Patents

Abstract

PURPOSE:To improve the accuracy of stopping position by eliminating the positional deviation of a punch and die at the time of moving a stocker and to reduce cost with a simple structure. CONSTITUTION:The characteristic of the stocker is as follows. In the stocker 25, a base 255 is fixed on a frame 27, and a post 29 is freely rotatably erected on the base 255 via a bearing 257. A stocker base 31 is engaged on the top of the post 29, a bracket 259 is arranged radially in the direction of the circumference on the top face of the stocker base 31, a metal die holder 23 is loaded freely attachably and detachably on this bracket 259, and a punch holder 23a supporting/bearing the punch P and a die holder 23b supporting/bearing the die D are provided in the metal die holder 23. And, by rotating the stocker base 31, the metal die holder 23, by which the desired punch P and the die D are supported/born, is positioned at a prescribed position, and the metal die unit is changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch and a die which house the punch and the die, for exchanging the punch and the die mounted on the upper and lower turrets of the turret punch press by an automatic die changing device. Regarding stocker.

[0002]

2. Description of the Related Art Conventionally, for example, a punch and a die mounted on the upper and lower turrets of a turret punch press are exchanged by an automatic die exchanging device, so a stocker is formed in the stocker storing the punch and the die. For example, a punch holder having a punch and a die holder having a die are separately housed on a rotating disk or the like. This punch holder and die holder are either simply inserted into the rotary disc, or a clamp type in which they are clamped and fixed by a cylinder or the like is used. For example, a tool gripping part that is a part of the automatic die changer is used. It is common to replace the punch holder and the die holder housed in the stocker with the die arm provided.

[0003]

By the way, in the conventional punch and die stocker described above, the desired punch,
Misalignment occurs when moving the die to the replacement position. To prevent this displacement, a strong clamping method must be adopted, but the structure becomes complicated and the cost increases. Further, since the punch holder and the die holder are grasped and replaced by the mold arm, there is a problem that the structure of the mold arm needs to be strong.

In order to solve the above problems, an object of the present invention is to eliminate the positional deviation of the punch and die during movement of the stocker, improve the accuracy of the stop position, simplify the structure, and reduce the cost of the punch and die stocker. To provide.

[0005]

In order to achieve the above object, the present invention provides a stocker for supporting a plurality of punches and dies, and a plurality of mold holders for supporting the punches and dies in a detachable and replaceable manner. , A part provided on the stocker base, in which the die holders support the die, is provided so as to project from the stocker base, and a punch support portion for supporting the punches in the vertical direction is detachably replaceable. It was provided to form a punch and die stocker.

[0006]

By adopting the punch and die stocker of the present invention, the punches and dies can be vertically attached to and detached from a plurality of die holders provided on the stocker base. The punch and die are exchanged by pulling out the die holder slightly from the stocker base. In the stored state, the mold holder is fixed on the stocker base.

Therefore, since the punch and the die are mounted on one die holder without being displaced during the replacement of the punch and the die, the structure is simple and the cost can be reduced.

[0008]

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

Referring to FIG. 20, the turret punch press 1 is provided with a gate-shaped frame 3, on which upper and lower turrets 5 and 7 which are rotatable are supported. Punches P and dies D are mounted on the circumferences of the upper and lower turrets 5 and 7 at positions corresponding to each other.

The upper and lower turrets 5 and 7 are provided with a machining position 9 and a die exchange position 11 for exchanging the punch P and the die D.
Is provided and the frame 3 above the processing position 9 is provided.
In order to hit the punch P, a striker is provided so as to be movable up and down 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. It is arranged so as to be movable (in the diagonal left and right direction in FIG. 20). A carriage base 17 extending in the X-axis direction and movable in the Y-axis direction is provided at the left ends of the front and rear side tables 15 straddling the center table 13.

This carriage base 17 is provided with a carriage 19 movable in the X-axis direction, and this 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 ball screw, a servomotor, etc., which are not shown in the drawings and are well known, but a detailed description of the configuration is omitted.

With the above construction, 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-axis.
The workpiece W is moved in the axial and Y-axis directions, and the desired position of the workpiece W is positioned at the machining position 9. The desired position of the work W is the processing position 9
Then, the upper and lower turrets 5 and 7 rotate to index the desired punch P and die D to the processing position 9,
The vertical movement of the striker causes the punch P and the die D to cooperate with each other to punch the workpiece W at a desired position.

In the vicinity of the frame 3 of the turret punch press 1, for example, on the right side in FIG. 20, a stocker 25 accommodating a plurality of die holders 23 supporting exchange punches and dies is arranged. This stocker 25
The stocker base 31 is attached to the support column 29 which is erected on the stand 27.
Is rotatably mounted, and a plurality of 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 the automatic mold changing device 33 which can reciprocate in the Y-axis direction. .. A U-shaped support frame 37 forming the moving table 35 is provided extending in the Y-axis direction.
The support frame 37 is provided on the pedestal 27, and as shown in FIG. 21, a drive shaft 39 is provided so as to extend in the Y-axis direction relative to the upper and lower horizontal portions of the support frame 37. .. The columns 41 are engaged with the drive shafts 39 provided on the upper and lower sides, and although not shown, the columns 41 are movable in the Y-axis direction via the drive shafts 39 by a driving member. Punch exchange hand 43 and die exchange hand 4
5 is mounted so as to be rotatable and vertically movable.

As shown in FIGS. 8 and 9, the movable table 35 which constitutes the die automatic changer 33 is as follows.
A spline groove 47 and a spiral groove 49 are formed on the column 41. (See FIG. 9) The block 53 supporting the punch arm 51 constituting the punch exchange hand 43 engages with the spline groove 47 and the spiral groove 49, and the block supporting the die arm 55 constituting the die exchange hand 45. 57 is engaged. This block 53,5
7 includes a rotating electric motor 59 and a lifting electric motor 61, respectively.
For example, the rotating electric motor 59 is mounted on the upper side of the block 53, the lifting electric motor 61 is mounted on the lower side, and the lifting electric motor 61 is mounted on the upper side of the block 57 and the rotating electric motor 59 is mounted on the lower side. ing.

In order to engage with the spline groove 47 and the spiral groove 49 provided on the support column 41, a rotation transmitting member is provided between the output shafts of the rotating electric motor 59 and the lifting electric motor 61 and the supporting column 41. Since this structure is already known, its illustration and detailed description are omitted. For example, the rotating electric motor 59
By rotating the gear fitted in the spline groove 47 of the support column 41 via the gear part, the punch exchange hand 43
Alternatively, the die exchange hand 45 can be turned. In addition, the up-and-down electric motor 61 is connected to the support column 4 via the gear portion.
By rotating the ball nut mounted in the spiral groove 49 of No. 1, the punch exchange hand 43 or the die exchange hand 4
5 can be moved up and down.

A fixed arm 63 constituting the punch arm 51 is fixed to the block 53 by bolts or the like, and a movable arm 65 is provided on the fixed arm 63 via a support member 67, and the movable arm 65 is movable by a fine amount. Has become. Further, a lock device 69 for fixing the fixed arm 63 and the movable arm 65 is provided.

Further, a punch P is attached to the tip of the movable arm 65.
Is provided with a gripping claw 71 for gripping, and a drive member 73 for bringing the gripping claw 71 into a gripped state or an opened state is provided, and a fluid pressure operated cylinder 7 that is a drive source of the drive member 73.
5 is provided on the fixed arm 63. Furthermore, a support plate 79 is fixed to the upper surface of a cover 77 that shields the drive member 73, and the vibration transmission member 8 is attached to the support plate 79.
A vibration generator 85, such as an ultrasonic vibrator, which is composed of 1 and a vibration source 83 is vertically provided on the center line of the punch P gripped by the grip claws 71.

With the above arrangement, when the punch exchange hand 43 is used to exchange 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 in the block 53 is used. The electric motor 59 and the elevating electric motor 61 are driven to position the grip claw 71 at the tip of the punch arm 51 at a position where the desired punch P can be gripped. Then, the mold holder 23 housed in the stocker 35 is pulled out to the position shown by the chain double-dashed line in FIG. Cylinder 75
Is operated, the punch P is gripped by the grip claws 71 via the drive member 73, and the lifting electric motor 61 is driven to drive the punch P.
Is pulled out upward, but at this time, the punch P can be pulled out smoothly by operating the vibration generator 85 to give vibration to the punch P. The position indicated by the chain double-dashed line in FIG. 9 indicates the upper limit of drawing.

When the punch P is mounted on the die holder 23 provided in the upper turret 5 or the stocker 25, the punch P gripped by the grip claws 71 at the tip of the punch arm 51 is placed at a desired punch mounting hole position. The rotating electric motor 59 and the lifting electric motor 61 are driven and positioned. Then, the lifting / lowering electric motor 61 is driven to lower the punch arm 51. At that time, the vibration generator 85 is actuated to move the punch P.
It can be installed smoothly by applying vibration to.

The block 57 includes a die arm 5
5, a fixed arm 87 is fixed by a bolt or the like, and a movable arm 89 on the fixed arm 87 is the same member as that provided in the punch arm 51.
7, the movable arm 89 is movable by a minute amount. In addition, the fixed arm 87 and the movable arm 89
A lock device 69 for fixing the is provided.

Further, a die holder mounted on the lower turret 7 is provided on the upper surface of the movable arm 89 (the structure will be described later).
And a loading / unloading device 91 for pulling out the mold holder 23 mounted on the stocker 25.
1 has a structure in which a cylinder 93 operated by fluid pressure moves a forward / backward movement shaft 95 forward and backward. In addition, the die holder pulled out by the loading / unloading device 91 or the die D mounted on the die holder 23 is temporarily held by the movable arm 89.
7, the die attaching / detaching device 103 including the upper cylinder 99 and the lower cylinder 101 is provided above and below the movable arm 89. The die attaching / detaching device 103 is also used to attach the die D housed in the temporary holding section 97 to the die holder or the die holder 23.

With the above structure, when the die exchange hand 45 is used to exchange the die D provided in the die holder, which will be described later, mounted on the lower turret 7 of the turret punch press 1, or the die D stored in the stocker 25. , The rotation electric motor 59 and the lifting electric motor 6 provided in the block 57
Drive 1 The movable arm 8 of the die arm 55
The loading / unloading shaft 95 of the loading / unloading device 91 provided in 9 is positioned at the withdrawal position of the die holder 23 housed in the die holder or the stocker 25, and the cylinder 93 of the loading / unloading device 91 is operated by a predetermined amount to operate the die holder or the die holder. Withdraw 23. The withdrawal position is the position shown by the chain double-dashed line in FIG. 8 or FIG.

After the die holder or the die holder 23 is pulled out, the upper cylinder 99 is operated to push the die D into the temporary holding portion 97 provided on the movable arm 89 to complete the removal of the die D.

The die D is attached to the die holder or the die holder 2
In the case of mounting on the No. 3, the temporary holding section 97 of the movable arm 89.
The center of the die D housed in the lower turret 7 is driven into the mounting hole of the die holder pulled out from the lower turret 7 or the die holder 23 pulled out from the stocker base 31 to position the rotating electric motor 59 and the lifting electric motor 61. .. Then, the lower cylinder 101 provided on the movable arm 89 is operated to push up the die D housed in the temporary holding portion 97 toward the die holder or the die holder 23 to complete the mounting.

Next, the punch arm 51 of the punch exchange hand 43 will be described in more detail.

Referring to FIGS. 10 to 13, 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 65 is attached to the fixed arm 63 of the punch arm 51 through the support member 67.
As shown in detail in FIG. 11, the support member 67 is provided with a plurality of (four in this embodiment) headed pins 105 penetrating the movable arm 65 and the fixed arm 63. .. A collar 107 is provided at the lower end of the headed pin 105 by a set bolt 109 so that its position can be adjusted. Furthermore, between the movable arm 65 and the fixed arm 63,
A rolling member 111 fitted on the head pin 105 is mounted between the fixed arm 63 and the collar 107. The rolling member 111 is composed of, for example, upper and lower rings 115 sandwiching a hard sphere 113. Has been done.

With the above structure, since the movable arm 65 is attached to the fixed arm 63 via the headed pin 105, the play between the headed pin 105 and the fixed arm 63, the movable arm 65, or the headed pin 105. 105 and rolling member 11
Since it has a backlash with the ring 115 of No. 1, when the punch P is pulled out from the die holder 23 housed in the upper turret 5 and the stocker 25, the straightness can be absorbed smoothly. Can be exchanged.

Further, a lock device 69 for fixing the fixed arm 63 and the movable arm 65 is provided. The lock device 69 is provided with a fluid pressure actuated cylinder 117 which is vertically provided on the lower surface of the fixed arm 63, and a piston rod 119 of the cylinder 117 is guided by a bush 121 mounted on the fixed arm 63 and is attached to the movable arm 65. It is configured to fit the inside diameter of the mounted bush 123. A tapered portion 125 is formed at the tip of the piston rod 119 to facilitate insertion of the piston rod 119 into the bush 123.

With the above structure, when the cylinder 117 of the lock device 69 is operated, the piston rod 119 is fitted into the bush 123 provided on the movable arm 65, and the movable arm 65 is locked with respect to the fixed arm 63. When the lock device 69 is operated, the punch P is inserted into the upper turret 5 or the punch P is inserted into the hole of the die holder 23 of the stocker 25. Since the punch P is locked without rattling, accurate insertion is possible. Is performed.

Further, a punch P is attached to the tip of the movable arm 65.
Gripping claws 71 for gripping are provided, and the gripping claws 71 are provided opposite to each other with the V groove 127 formed inward as shown in FIG. The drive member 73 for driving the gripping claw 71 is provided with a fluid pressure cylinder 75 on the upper surface of the movable arm 65, and the joint 131 provided at the tip of the piston rod 129 of the cylinder 75 is attached to the rack plate 1.
A sliding plate 135 having 33 is provided in a horizontal state. The sliding plate 135 is a guide plate 137.
It is guided by a and 137b so that it can move forward and backward.

Rack plate 133 provided on the sliding plate 135
A pinion 139 meshing with the tooth portion of the shaft is locked to a shaft 141, and the shaft 141 is rotatably suspended from a movable arm 65 via bearings 143a and 143b. A pinion 145 is engaged with the shaft 141 below the pinion 139, and a rack plate 147 is meshed with the pinion 145. The rack plate 147 is provided opposite to the pinion 145. Rack plate 14
7 are fixed to the grip claws 71, respectively. Each grip claw 71 is provided so as to be expandable and contractible with the guide rod 149 as a guide (see FIG. 13).

With the above structure, when the cylinder 75 is operated and the piston rod 129 is projected, for example, the sliding plate 13
5 moves forward, and the rack plate 133 also moves forward. Rack plate 13
The pinion 139 meshed with the forward movement of 3 rotates in the clockwise direction in FIG. As the pinion 139 rotates, the pinion 145 also rotates via the shaft 141, and the rack plate 147 meshed with this pinion 145 moves in the retracting direction in FIG. 13, so the grip claw 71 provided with the rack plate 147 is The punches P are gripped by the V-groove 127 portion of the gripping claw 71 irrespective of the diameter of the gripping portion of the punch P, as shown by the chain double-dashed line in the drawing. be able to.

In order to release the grip of the grip claw 71 from the punch P, the grip can be released by reversing the above operation. That is, when the piston rod 129 of the cylinder 75 is retracted, the pinion 139 rotates in the counterclockwise direction in FIG. 12 due to the backward movement of the rack plate 133, and the pinion 145 also rotates in the same direction via the shaft 141. By rotating the pinion 145 in the counterclockwise direction, the grip claws 71 can move outward from each other via the rack plate 147, and the grip claws 71 can be separated from the punch P.

A cover 77 for protecting the driving member 73 is provided, and a support plate 79 is fixed to the upper surface of the cover 77. The support plate 79 is provided with a vibration transmission member 81 which is operated by a vibration source 83. For example, a vibration generator 85 such as an ultrasonic vibrator is attached. As the operation of the vibration generator 85, as described above, when the punch P is attached to or detached from the upper turret 5 of the turret punch press 1, or when attached to or detached from the die holder 23 of the stocker 25, the punch P is vibrated. It is for giving and detaching easily.

Next, the die holder 151 mounted on the lower turret 7 of the turret punch press 1 will be described in detail.

Referring to FIGS. 14, 15 and 16, a large number of die holder bases 153 are radially fixed to the circumference of the lower turret 7 by bolts 155, and a plurality of dies D on the die holder base 153 are arranged. The die holder 151 provided is attached. This die holder 15
A protruding pressing portion 157 is formed on the front end side (left side in FIGS. 14 and 15) of 1, and a pressing block 159 that engages with the pressing portion 157 is fixed to the die holder base 153.

A pin 161 for preventing floating is attached to the rear side of the die holder 151, and the pin 161 is a protrusion formed on the die holder base 153, which is an engaging portion 1.
It is inserted in the lower part of 63 to prevent the die holder 151 from floating above the die holder base 153. Further, a cam 165 is rotatably mounted on the rear end side of the die holder 151, and an eccentric portion 167 of the cam 165 can be inserted into and removed from a groove 169 formed in the die holder base 153. The cam 165 is provided with a slit 171 that allows a part of a locking member provided at the tip of the loading / unloading shaft 95 of the loading / unloading device 91 of the die exchange hand 45, which will be described later, to be engaged and disengaged.

Further, on the rear end side of the die holder 151, as shown in FIG. 16, the insertion groove 173 and the locking groove 1 are provided.
75 are formed. Also, the die holder base 153
An abutting surface 177 is formed on the rear end side, and the abutting surface 177 is brought into contact with the protrusion 179 of the die holder 151 for positioning. Reference numeral 181 is a lid, which is provided to facilitate processing. Reference numeral 183 is a hole in which the die D is mounted.

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

FIG. 17A shows a die holder base 153.
The state when pulling out the die holder 151 locked to
This is exactly the same as the locked state described with reference to FIG. In this state, the T-shaped locking member 185 provided at the tip of the loading / unloading shaft 95 of the loading / unloading device 91 of the die exchange hand 45 described later is inserted into the insertion groove 173 provided in the die holder 151. At this time, the locking member 185 is also inserted into the slit 171 provided in the cam 165.

Then, as shown in FIG. 17 (B), the inserted loading / unloading shaft 95 is rotated 90 ° to the left or right. By rotating the loading / unloading shaft 95, the locking member 18
The pin 187 provided in No. 5 enters the locking groove 175, and the eccentric portion 167 of the cam 165 slips out of the groove 169 and becomes free.

From this state, as shown in FIG. 17C, the pin 187 provided on the locking member 185 is locked by the locking groove 175 by moving the loading / unloading shaft 95 to the right in the figure. Therefore, the die holder 151 can be protruded from the die holder base 153 by a predetermined amount, and the die D can be replaced. The die holder 151 can be locked to the die holder base 153 by performing the above operation in reverse.

Therefore, conventionally, the fixing block was pressed and fixed to the die holder with bolts and the die holder was fixed to the lower turret, so a tool was required, but in the present embodiment, the fixing and releasing can be done with one touch. In addition, the pressing portion 157 and the pin 161 are provided before and after the die holder 151,
Since floating is prevented, the number of constituent members is small, and processing can be easily performed.

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

Referring to FIGS. 18 and 19, this figure 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 89 is attached to the fixed arm 87 of the die arm 55 via a support member 67, and a lock device 69 for fixing the fixed arm 87 and the movable arm 89 is provided. Since the structure and operation of the lock device 69 and the support member 67 are exactly the same as those provided on the punch arm 51 of the punch exchange hand 43 described above, the same members are designated by the same reference numerals. And the description is omitted. The proximity switch indicated by reference numeral 189 detects that the lock device 69 is activated and locked.

With the above structure, when the die D is pulled out from the die holder 23 housed in the lower turret 7 and the stocker 25, the roundness of the straightness can be absorbed smoothly due to the backlash of the supporting member 67. Can be exchanged.
Further, when the locking device 69 is operated, it is time to insert the die D into the lower turret 7 or the die D into the hole of the die holder 23 of the stocker 25. Since the die D is locked without rattling, an accurate insertion work is performed. Is performed.

A bearing block 191 is fixed to the upper surface of the movable arm 89 of the loading / unloading device 91, and a nut case 193 is mounted on the bearing block 191 via a bearing 192.
Is rotatably provided. This nut case 193
A spline nut 195 is integrally fitted into the inside of a key 196 by a key 196, and the inlet / outlet shaft 95 having a spline groove to be inserted into the spline nut 195 is attached to the tip (left side in FIG. 18) of the inlet / outlet shaft 95. Has a T-shaped locking member 185 coupled thereto, and a pin 187 is provided so as to project from the tip end side of the locking member 185.

The rear end (right side in FIG. 18) of the input / output shaft 95 is connected to a support shaft 197, a collar 199 is formed on one side of the support shaft 197, and a collar 201 is fixed to the other end by a bolt 203. Has been done. A thrust bearing 207 is mounted between the collar 201 and the collar 199 with the connecting plate 205 sandwiched therebetween, and the loading / unloading shaft 95 is rotatably provided.

The other end of the connecting plate 205 is provided with, for example, a fluid pressure operated cylinder 93 on a support plate 209 fixed to the upper surface of the bearing block 191, and is engaged with the tip of a piston rod 211 of this cylinder 93. It is connected to the mating member 213. A plurality of (two in this embodiment) guide rods 215 guided by the connecting plate 205 are provided on a bracket 217 that is erected at the end of the movable arm 89 and a bracket 219 that hangs from the side surface of the cylinder 93. It is supported and crossed. A sliding member 221 is provided on the connecting plate 205, and the sliding member 221 moves while sliding on the guide rod 215, so that the connecting plate 205 can move smoothly.

With the above structure, when the cylinder 93 is operated and the piston rod 211 is projected, the connecting plate 2
05, a shaft 95 having a spline groove is provided in FIG.
8 to the position shown by the solid line in the figure. That is, the pin 187 provided on the locking member 185 provided at the tip of the loading / unloading shaft 95.
The die holder 151 can be pulled out from the die holder base 153 by a predetermined amount. Further, the die holder 151 can be set to the old position by operating the cylinder 93 and retracting the piston rod 211.

The access device 91 is provided with a rotating device 223. This rotating device 223 is the same as the nut case 1 described above.
A pulley 225 is integrally provided on the side surface of 93, and the output shaft 23 of the electric motor 229 is fixed to the pulley 225 and a bracket 227 engaged with the side surface of the bearing block 191.
The chain belt 235 is attached to the pulley 233 that is locked to 1.
Are hung around (see FIG. 19).

With the above structure, when the electric motor 229 is driven, the pulley 233, the chain belt 235, and the pulley 225.
The rotation is transmitted to the nut case 193 via the, and the rotation of the nut case 193 rotates the spline nut 195 integrally provided with the key 196. Spline nut 195
When turning, the engaging / disengaging shaft 95 rotates,
The pin 187 provided on the locking member 185 provided on the above is rotated by a predetermined angle. Then, as described above, the output shaft 95 can be engaged with and disengaged from the die holder 151.

At the tip of the movable arm 89 (on the left side in FIG. 18), a lower cylinder 101 constituting a die attaching / detaching device 103 is vertically provided. The lower cylinder 101 has a die housing 237 which also serves as a cylinder case and a die D.
Is temporarily formed. The die housing 237 has a piston 239 and a piston rod 241 integrally provided on the piston 239.
And an end plate 243 is locked at the tip of the piston rod 241.
The outer periphery of 43 is vertically slidably mounted in the inner diameter of the hole 245 of the temporary holding portion 97.

An upper cylinder 99 which constitutes the die attaching / detaching device 103 is erected on the tip of the support plate 209 (on the left side in FIG. 18). In the upper cylinder 99, an end plate 249 is integrally provided at the tip of a built-in piston rod 247. The outer diameter of the end plate 249 is slightly smaller than the outer diameter of the die D.

When the die holder 151 is pulled out from the lower turret 7 of the turret punch press 1, a block 25 is provided on the tip side of the bearing block 191 for positioning.
1 is provided, and the positioning pin 2 is provided on the block 251.
53 is provided in the horizontal direction.

With the above-mentioned structure, the die holder base 153 provided on the lower turret 7 of the turret punch press 1 is operated by the operation of the above-mentioned loading / unloading device 91 and rotating device 223.
After the die holder 151 having the die D to be replaced is brought into contact with the drawer positioning pin 253 and positioned, the upper cylinder 99 which is the die attaching / detaching device 103 is operated, and the end plate 249 presses the die D to press the lower cylinder. 10
The die D is mounted in the temporary holding portion 97 provided in 1. In this state, rotate the die arm 55 of the die exchange hand 45,
The movable table 35 is moved to the stocker 25 side and the die D is stored in the desired die holder 23.

The state in which the die D is mounted on the die holder 23 of the stocker 25 is shown in FIG. 9. To mount the die D, the lower cylinder 101 is operated and the end plate 243 stores the die D in the temporary holding portion 97. Push up the die D
The die holder 23 is housed in the die mounting hole.

Also, the die holder 151 of the lower turret 7
When the die D held by the die arm 55 is mounted, or when the die D stored in the die holder 23 of the stocker 25 is mounted on the die arm 55 side, the above-described operation is performed in reverse. Can be exchanged.

The stocker 25 is shown in FIGS. 1, 2 and 3.
As shown in FIG.
Is fixed, and the support column 29 is rotatably erected on the base 255 via a bearing 257. The stocker base 31 is locked to the upper end of the support column 29, and a bracket 259 having a U-shaped cross section is provided on the upper surface of the stocker base 31 and arranged radially in the circumferential direction. The mold holder 23 is attached to and retracted from. The punch holder 23a of the die holder 23 is provided with a punch P, and the die holder 23b is provided with holes 261 and 263 through which a die D can be inserted and removed.

A pulley 265 is attached to the lower end of the support column 29, and a belt 271 is wound around the pulley 269 attached to the output shaft of an electric motor 267 provided on the base 255 to rotate. It is being transmitted.

With the above structure, when the electric motor 267 is driven, the pulley 269 rotates, and the pulley 265 rotates via the belt 271. Since this pulley 265 is fixed to the column 29, the column 29 rotates to rotate the stocker base 31, and the die holder 23 having the punch P and the die D to be replaced can be positioned at a predetermined position. ..

The mold holder 23 will be described in more detail. Referring to FIGS. 4, 5 and 6, a bracket 25 having a U-shaped cross section on the upper surface of the striker base 31.
A plurality of 9 are radially fixed and provided. The mold holder 23 is mounted on the bracket 259 so as to be freely inserted and removed, the mold holder 23 has an L shape, and the punch support portion 23a into which the punch P is inserted has a hole 261 and the die support portion 23b. Has a hole 263 vertically formed therein into which the die D is inserted.

The mold holder 23 can be attached to and detached from the bracket 259 by mounting the die holder 151 on the die holder base 153 provided on the lower turret 7 described above.
Since the configuration is the same as the detached configuration, the same reference numerals are given to the same members and the description thereof will be omitted.

That is, a protruding pressing portion 157 is formed on the tip side (right side in FIGS. 4 and 5) of the die holder 23, and the pressing block 159 that engages with the pressing portion 157 is formed.
Is fixed to the stocker base 31 via the bracket 259 to prevent the die holder 23 from floating on the tip side. Moreover, in order to prevent the rear side of the mold holder 23 from floating, a pin 161 is mounted, and this pin 161 is inserted into the lower portion of the engaging portion 163 which is a protrusion formed on the bracket 259, and is attached to the bracket 259. In contrast, the mold holder 23
Is prevented from rising.

Further, the cam 16 is provided on the rear end side of the die holder 23.
5 is rotatably mounted, and the eccentric portion 167 of the cam 165 can be inserted into and removed from the groove 169 formed in the bracket 259. It should be noted that a part of a T-shaped locking member 185 provided at the tip of the loading / unloading shaft 95 of the loading / unloading device 91 of the die exchange hand 45 is engaged with the cam 165.
A slit 171 that can be detached is formed.

Further, on the rear end side of the mold holder 23, as shown in FIG.
As shown in FIG. 3, the insertion groove 173 and the locking groove 17 are
5 is formed. An abutting surface 177 is formed on the rear end side of the bracket 259, and the abutting surface 177 is formed.
The abutting surface 179 of the mold holder 23 comes into contact with and is positioned.

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

FIG. 7A shows a state in which the mold holder 23 locked to the bracket 259 is pulled out. First, FIG.
It is exactly the same as the locked state described in. In this state, the loading / unloading shaft 95 of the loading / unloading device 91 of the die exchange hand 45.
The locking member 185 provided with the T-shaped pin 187 provided at the tip of is inserted into the insertion groove 173 provided in the mold holder 23. At this time, the slit 17 provided on the cam 165
The locking member 185 is also inserted into the inside 1.

Then, as shown in FIG. 7 (B), the inserted loading / unloading shaft 95 is rotated 90 ° to the left or right. By rotating the loading / unloading shaft 95, the locking member 18
The pin 187 provided in No. 5 enters the locking groove 175, and the eccentric portion 167 of the cam 165 slips out of the groove 169 and becomes free.

From this state, as shown in FIG. 7C, the pin 187 provided on the locking member 185 is moved to the locking groove 1 by moving the loading / unloading shaft 95 to the left side in the drawing.
Since it is locked by 75, the die holder 23 can be projected from the bracket 259 by a predetermined amount to a position where the die D can be exchanged, and the die D and the punch P can be exchanged. The mold holder 23 can be locked to the bracket 259 by performing the above operation in reverse.

With the above-described structure, the punch P and die D mounted on the upper and lower turrets 5, 7 and the punch P mounted on the die holder 23 housed in the stocker base 31 of the stocker 25, The die D can be exchanged in a short time by the die automatic changer 33. Moreover, by using the stocker 25 of the present embodiment, the mold holder 23 can be fixed and released to the stocker base with one touch, the mold holder 23 is locked to the bracket 259 by the cam 165, and Since the holding portion 157 and the pin 161 prevent the front and rear of the holder 23 from floating, when the stocker 25 is moved, the punch P and the die D are moved.
It is possible to improve the stop position accuracy and reduce the cost with a simple configuration.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[0077]

As can be understood from the above description of the embodiments, according to the present invention, since the construction is as described in the claims, the displacement of the punch and die can be caused. Instead, the accuracy of the stop position is improved, and the punch and die are mounted on one die holder, so that the structure is simplified and the cost can be reduced.

[Brief description of drawings]

FIG. 1 shows a stocker showing a main part of the present invention, and FIG.
FIG. 6 is a sectional view taken along line I-I in FIG.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is an enlarged plan view of an IV arrow portion in FIG.

5 is a sectional view taken along line VV in FIG.

FIG. 6 is a side view seen from the left side in FIG.

FIG. 7 is an operation explanatory view when the mold holder is pulled out from the stocker base.

FIG. 8 is a side view of an automatic mold changing device.

9 is an enlarged view of a portion viewed from the arrow IX in FIG.

FIG. 10 is a side view showing a punch exchange hand.

11 is a partial cross-sectional view of FIG.

12 is a plan view of FIG.

13 is a sectional view taken along line XIII-XIII in FIG.

FIG. 14 is a plan view showing a die holder in a lower turret.

15 is a sectional view taken along line XV-XV in FIG.

16 is a side view seen from the right side in FIG.

FIG. 17 is an operation explanatory view when the die holder is pulled out from the die holder base.

FIG. 18 shows a die exchange hand, and is XVII in FIG.
FIG. 8 is a cross-sectional view taken along the line I-XVIII.

FIG. 19 is a plan view of FIG. 18.

FIG. 20 is a perspective view in which an automatic mold changing device is reciprocally provided between a turret punch press and a stocker in one example of the present embodiment.

FIG. 21 is a perspective view showing the automatic die changing device and the stocker in FIG. 20.

[Explanation of symbols]

 23 Mold Holder 23a Punch Support 23b Die Support 25 Stocker 33 Stocker Base

Claims (1)

[Claims] 1. A stocker for supporting a plurality of punches and dies, and a plurality of die holders for detachably and interchangeably supporting the punches and dies are provided on a stocker base, and each die holder supports the die. A punch and die stocker, wherein a portion is provided so as to project from the stocker base, and a punch support portion that supports the punch in a vertically removable manner is provided in the die holder.