JP3194988B2 - Turret punch press and composite turret punch press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turret punch press provided with a turret in the shape of a truncated pyramid or a truncated cone, and a composite turret punch press.

[0002]

2. Description of the Related Art A conventional turret punch press will be described. A frame is provided with a disk-shaped upper turret and a disk-shaped lower turret which are vertically opposed and rotatable in a horizontal state. The upper turret is provided with a plurality of removable upper dies, and the lower turret is provided with a plurality of removable lower dies. The lower mold projects a small amount from the upper surface of the lower turret.

[0003]

However, in the conventional turret punch press as described above, the lower turret provided on the frame in a horizontal state is provided with a plurality of lower dies on the upper surface of the lower turret. Since the protruding portions are provided so as to protrude, there is a problem that the plate material interferes with the lower mold when moving and positioning the plate material, and the plate material is damaged.

Since the distance between the upper turret and the lower turret is small, the lower turret must be lowered relative to the upper turret to increase the gap between the upper turret and the lower turret. There was a problem that the lower mold could not be replaced, resulting in poor work efficiency.

Accordingly, an object of the present invention is to provide a turret punch press and a composite turret punch press that can solve the above problems.

[0006]

In order to solve the above-mentioned conventional problems, in the present invention, as a first means, in a turret punch press, a substantially polygonal truncated pyramid or substantially truncated conical turret is used. A plurality of mold stations are provided in such a manner that the center axis is inclined with respect to the frame and rotatably provided about the center axis, and a plurality of mold stations for holding a detachable mold on the side surface of the turret are appropriately provided in the circumferential direction. When the turret is rotated by a predetermined angle about a central axis to position a predetermined mold station at a substantially horizontal machining position, another predetermined mold station is moved to a substantially vertical mold changing position. And a rotary drum is provided on one side of the turret so as to be rotatable about a rotary shaft and movable in the direction of the rotary shaft. A plurality of mold holding sections for holding a detachable mold, a mold held at a mold station located at the mold changing position, and a mold holding section corresponding to the mold changing position. It is characterized in that a mold exchanging device for exchanging with a mold is provided.

As a second means, two turret punch presses comprising the first means are provided, and a frame of one turret punch press and a frame of the other turret punch press are integrated.

[0008]

In the above construction, before performing punching on the plate material, the detachable mold is held by a number of mold holding portions provided on the peripheral surface of the rotary drum. by this,
A large number of molds can be stored.

After storing a large number of molds, the turret is rotated by a predetermined angle about the central axis to position a predetermined mold station at a substantially horizontal processing position. Then, a desired punching process is performed on the plate material using a predetermined mold held at a predetermined mold station. At this time, another predetermined mold station is located at a substantially vertical mold change position.

During the punching process, when the mold is replaced, the rotary drum is rotated by a predetermined angle about the rotary shaft, and the rotary drum is moved by a predetermined amount in the direction of the rotary shaft. A predetermined mold holding portion provided on the drum is positioned at a position corresponding to the mold changing position. By appropriately operating the mold changing device, the mold held at the mold station located at the mold changing position, and the mold held at the mold holding unit located at the corresponding position. Can be exchanged.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to this embodiment will be described below with reference to the drawings.

Referring to FIGS. 1 and 2, the turret punch press 1 is provided with a bridge type frame comprising an upper frame 3 and a lower frame 5 which are vertically opposed to each other.

An upper turret device 11 for holding a plurality of upper mold holders 9 having an upper mold 7 on the upper frame 3.
And the lower frame 5 has a lower mold 13.
There is provided a lower turret device 17 for holding a plurality of lower mold holders 15 provided with the above. Upper turret device 11
Is provided with an upper mold storage device 19 for storing a large number of upper dies 7, and a lower mold storage device 21 for storing a large number of lower dies 13 is provided near the lower turret device 17. It is. The upper mold 9 and the lower mold 13 in the upper mold housing device 19 and the lower mold housing device 21 are housed in a state held by the upper mold holder 9 and the lower mold holder 15, respectively. In order to exchange a predetermined upper mold 7 held in the upper turret device 11 and a predetermined upper mold 7 stored in the upper die storage device 19, the upper frame 3 has an upper die changing device. In order to exchange a predetermined lower die 9 similarly held in the lower turret device 17 with a predetermined lower die 9 stored in the lower die storage device 21, FIG. Although omitted, the lower frame 5 is provided with a lower mold changing device. In addition,
The lower frame 5, the upper mold housing device 19, and the lower mold housing device 21 are provided on a common frame 25.

For details of the upper turret device 11, referring to FIGS. 1 and 3, a casing 27a is provided in the upper frame 3, and an upper turret 29a having a substantially polygonal truncated pyramid shape is provided in the casing 27a. The central axis is inclined. The upper turret 29a includes a base 31a.
And a plurality of (four in this embodiment) arm portions 33a radially extending from the base portion 31a, and strictly do not have a truncated polygonal shape, but have a substantially truncated polygonal shape. . Each of the arms 33a is provided with an upper mold station 35a.
Is provided with an upper holder holding member 37a for detachably holding the upper mold holder 9 having the upper mold 7. Here, the upper mold holder 9 is held in a state having a predetermined direction with respect to the upper holder holding member 37a through known means of a key and a key groove, and the upper mold 7 is connected to the upper mold. The holder 9 is held in a state having a predetermined direction through known means such as a key, a key groove, and a ball plunger.

As shown in FIG. 5, the upper mold holder 9 has a pair of arc-shaped flange portions 39a and a pair of linear flange portions 41a. Further, a grip groove is formed in the pair of flange portions 41a.

Also, as shown in FIG.
To rotate the casing 2 around the central axis.
A turret rotating device 45a provided with an upper turret servo motor 43a is provided in the upper turret servo motor 43a.
It is linked to 7a.

When the upper turret 29a is rotated by a predetermined angle to position the predetermined upper mold station 35a at a substantially horizontal processing position (vertically below the striker 49), another predetermined upper mold station is stopped. 3
The upper turret 29a is configured so that 5a 'is located at a substantially vertical mold changing position. At this time, in order to make the upper turret 29a unrotatable, the upper frame 3
Is provided with a shot pin 51a, which can be engaged with an engagement recess provided at a predetermined position of the arm 33a by the action of the fluid pressure cylinder 53a.

Referring to FIG. 3, each of the arm portions 33a
An upper holder supporting device 55a for supporting the upper mold holder 9 held at the upper mold station 35a is provided. More specifically, each arm 33a is provided with a pair of blocks 57a, and the pair of blocks 57a is provided with a supporting claw 59a for supporting the flange 39a via a built-in cylinder so as to be movable. Here, the support claws 5
The surface of the upper mold holder 9 facing the upper mold holder 9 is formed in an arc shape corresponding to the peripheral surface shape of the upper mold holder 9.

Since the details of the configuration of the lower turret device 17 are substantially the same as the configuration of the upper turret device 11, the components of the lower turret device 17 are the same as those of the upper turret device 11 shown in FIG. The same reference numerals and b symbols are used as in FIG. 1 and only different points will be described.

Referring to FIG. 3, the lower turret device 17
When the lower turret 29b constituting a part of the lower frame 5b is rotated to position the predetermined lower mold station 35b at a substantially horizontal processing position, the lower frame 5 is supported to support the predetermined arm 33b from below. Is provided with a turret support member 61.

Further, a push-up member 63 for pushing up the lower mold 13 is provided in each lower mold holder 15, and a flange portion of the push-up member 63 and a step portion of the lower mold holder 15 are provided with a push-up member. A spring for urging the raising member 63 toward the bottom surface of the lower mold holder 15 is elastically mounted. Lower turret 29b
Is rotated to position the predetermined lower mold station 35b in the horizontal position, and then, the lower frame 5 is provided with a lifting cylinder 65 for pushing up the lower mold 13 on the predetermined lower mold station 35b. And a piston rod 6 which can be projected upward from the push-up cylinder 65.
7 serves to push up the push-up member 63.

With the above configuration, the lower turret 29b is rotated about the central axis to position the lower mold station 35b of the predetermined arm portion 33b at a substantially horizontal processing position. At this time, the predetermined arm portion 33b is supported by the turret support member 61 from below.
Then, the piston rod 6 is pushed through the push-up cylinder 63.
7, the lower die 13 is raised by raising the push-up member 63, and the upper side of the lower die 13 is positioned at the height of the pass line.

Referring to FIGS. 1 and 2, details of the upper mold housing device 19 and the lower mold housing device 21 will be described.
A pair of guide rails 69 are provided on the common frame 25 so as to extend in the front-rear direction. A traveling frame 71 is provided on the guide rails 69 via a traveling portion 73 so as to be movable in the front-rear direction. In order to move the traveling frame 71 in the front-rear direction, a ball screw 77 extending in the front-rear direction via a pair of support members 75 is rotatably provided on the common frame 25, and is screwed to the ball screw 77. A nut member 79 is attached to the traveling frame 71 at an appropriate position. Here, the ball screw 77 is attached to a servo motor 81 provided on an appropriate support member 75 by a sprocket 83,
85 and the chain 87 are interlockingly connected.

An upper rotating drum 89a is rotatably provided on the upper side of the traveling frame 71 via a rotating shaft 91a. An upper mold 7 is provided on the peripheral surface of the upper rotating drum 89a.
Are provided with a number of upper mold holding ports 93a for holding the upper mold holder 9 provided with. A large number of the upper mold holding ports 93a are arranged in parallel in the direction of the rotating shaft 91a and are provided at appropriate intervals in the circumferential direction of the upper rotating drum 89a. Here, the height position of the rotating shaft 91a is substantially the same as the height position of the upper mold 7 on the upper mold station 35a 'located at the substantially vertical mold changing position.

A hole 95 provided in the upper mold holding opening 93a.
FIG. 4A shows a peripheral groove 97 of the upper mold holder 9 as shown in FIG.
a, which can be engaged with the upper mold holding opening 9 by a spring 101a.
It is urged in a direction to protrude from the inner surface of 3a. Here, the ball 99a does not come off the hole 95a. Further, when the heads of a large number of upper molds 7 are positioned on the lower side by the rotation of the upper rotating drum 89a, in order to support the heads of a large number of upper molds 7,
A mold support member 103a is provided on the upper side of the traveling frame 71, and the mold support member 103a extends in the front-rear direction and is formed in an arc shape.

On the lower side of the traveling frame 71, a lower rotating drum 89b constituting a part of the lower mold housing device 21 is provided.
The lower rotary drum 89b is provided with a lower die holding opening 93b for holding the lower die holder 15 having the lower die 13 on the peripheral surface of the lower rotary drum 89b. The lower mold supporting member 10 having the same configuration as the upper mold supporting member 103a is provided on the lower side of the traveling frame 71.
3b is provided.

In order to rotate the upper rotary drum 89a and the lower rotary drum 89b, the rotary shafts 91a and 91b are integrally provided with driven sprockets 105a and 105b, respectively. 1
In 07, drive sprockets 111a and 111b connected to driven sprockets 105a and 105b via chains 109a and 109b are integrally mounted. In order to rotate the rotating shaft 107, a servo motor 113 is provided on the traveling frame 71 via a support bracket 115, and a sprocket 117 provided on an output shaft of the servo motor 113 is provided on the rotating shaft 107. The sprocket 119 is connected to the sprocket 119 via a connection chain 121.

With the above configuration, the running frame 71 can be moved in the front-rear direction via the guide rail 67 by appropriately operating the servo motor 81 to rotate the ball screw 77. Therefore, the upper rotating drum 89a and the lower rotating drum 89b can be moved in the front-rear direction.

Further, by appropriately operating the servo motor 113 to rotate the rotating shaft 107, the rotating drum 8 is rotated.
9a and 89b can be rotated by a predetermined angle.

Referring to FIGS. 1, 5 and 6, for details of the upper mold exchanging device 23, a support frame 123 provided integrally with the upper frame 3 has a horizontal direction (FIGS. 1 and 6). In FIG. 5, a pair of guide bars 125 are provided extending in the left-right direction (in FIG. 5, front and back directions), and a first slider 127 is provided on the pair of guide bars 125 so as to be movable in the left-right direction. In order to move the first slider 127 in the left-right direction, a first transfer cylinder 131 provided with a piston rod 129 movable in the left-right direction is provided on the left side of the support frame 123, and the tip of the piston rod 129 is It is integrally attached to the first slider 123.

The first slider 123 is provided with a second slider 135 via a pair of slide bars 133 extending in the front and rear direction (front and back in FIG. 1, right and left in FIG. 5, and upper and lower in FIG. 6). The second slider 135 is provided with a first holder holding device 137 for holding the flange portion 41a of the upper mold holder 9,
A holder holding device 139 is provided. In order to move the second slider 135 in the front-rear direction, the second slider 1
A piston rod 1 movable in the front-rear direction is provided on the rear side of 35.
A second transfer cylinder 143 provided with a piston 41 is provided, and a distal end of the piston rod 141 is integrally attached to an appropriate position of the first slider 123. Further, in order to restrict the movement of the second slider 135 in the forward direction, a regulating cylinder 147 provided with a piston rod 145 capable of adjusting the position in the front-rear direction is provided on the rear side of the second slider 135, The tip of the piston rod 145 can contact a predetermined position of the first slider 123.

With the above configuration, the first transfer cylinder 131
By moving the first slider 127 to the left through the, the first holder holding device 137 and the second holder holding device 139 can be made to approach the upper mold housing device 19. Further, the first holder holding device 137 and the second holder holding device 135 can be made to approach the upper turret device 11 via the first transfer cylinder 131.

Further, by moving the second holder holding device 139 forward through the second transfer cylinder 143, the second holder holding device 139 is moved to a predetermined upper mold station 35a 'located at the mold changing position. The first holder holding device 137 can be positioned at a position corresponding to a die changing position, which will be described later, as well as at a position facing left and right. Further, the first holder gripping device 137 can be located at a position opposite to the predetermined upper mold station 35a 'from left to right via the second transfer cylinder 143.

For details of the first holder gripping device 137, referring to FIG. 7, a box-shaped gripping base 149 is provided below the second slider 135. A pair of slide shafts 151 and 153 extending in the front-rear direction (left-right direction in FIG. 7)
It is provided to be movable. A grip arm 155 is integrally provided at the tip of the slide shaft 151, and a grip arm 1 is provided at the tip of the slide shaft 153.
57 are provided integrally, and each gripping arm 155, 15
7 is provided with gripping claws 159 and 161 capable of engaging with the gripping grooves of the flange portion 39a of the upper mold holder 9.

Rack portions 163 and 165 are provided at appropriate positions on the slide shafts 151 and 153 so that the pair of gripping arms 155 and 157 can be moved in the front-rear direction so as to approach and separate from each other in synchronization. In addition, a pinion 167 meshing with the rack portions 163 and 165 is rotatably provided in the grip base 149. Further, in order to move the pair of gripping arms 155 and 157 in the forward and backward directions that approach and separate from each other, a gripping cylinder 173 provided with a piston rod 171 that is movable in the forward and backward directions is provided on a support bracket 169 attached to the gripping base 149. Provided,
The tip of the piston rod 171 is integrally attached to the end of the slide shaft 151. Guide rods 175 and 177 for guiding the gripping arms 155 and 157 are provided below the gripping base 149, and the gripping arms 15 near the rear end of the slide shaft 151 are provided.
The vehicle is guided in the front-rear direction via 5.

In order to prevent the pair of gripping arms 155 and 157 from moving beyond a predetermined interval corresponding to the size of the upper mold holder 9, the support bracket 169 has a front-rear position adjustment. A regulating cylinder 181 having a freely movable piston rod 179 is provided.
83 can be contacted.

With the above configuration, the gripping cylinder 173 is appropriately operated to move the pair of gripping arms 155 and 157 in directions away from each other. At this time, a pair of gripping arms 155 and
The pair of gripping arms 155 and 157 are separated from each other by the above-mentioned predetermined distance because the movement of the pair of gripping arms 155 and 157 is restricted because the 157 moves beyond the predetermined distance corresponding to the size of the upper mold holder 9. Has become.

After the pair of gripping arms 155 and 157 are separated from each other by the predetermined distance, the pair of gripping arms 155 and 157 are separated.
The upper mold holder 9 is positioned between 157. Then, by appropriately operating the gripping cylinder 173 to bring the pair of gripping arms 155 and 157 closer to each other, the upper mold holder 9 is moved by the pair of gripping arms 155 and 157.
Can be gripped.

Since the configuration of the second holder gripping device 139 is almost the same as the configuration of the first holder gripping device 137, the components of the second holder gripping device 139 in the drawing are the same as those of the first holder gripping device 137. The same numbers are assigned to the corresponding components in the second holder holding device 139.
The details of the configuration are omitted. The configuration of the lower die changing device, not shown, is substantially the same as the configuration of the upper die changing device 23.

The operation of this embodiment will be described based on the configuration as described above.

Before performing punching on a sheet material,
The upper mold holder 9 having the upper mold 7 is mounted and held in the upper mold holding holes 93a provided on the peripheral surface of the upper rotary drum 89a, respectively, and the lower mold holders provided on the peripheral surface of the lower rotary drum 89b are provided. The lower mold 13 is inserted into the mold holding port 93b.
The lower mold holder 15 provided with is mounted and held. As a result, a number of upper dies 9 and a number of lower dies 13 can be stored in the upper die storage device 19 and the lower die storage device 21, respectively.

The upper turret 29 of the upper turret device 11
a is rotated by a predetermined angle via the servomotor 45a, so that the predetermined upper mold station 35a is at a substantially horizontal processing position (vertical lower position of the striker 49).
Can be located. Similarly, the lower turret 29b of the lower turret device 17 is rotated by a predetermined angle to position the predetermined lower die station 35b at a substantially horizontal processing position, and the predetermined lower die via the lifting cylinder 65. 13 is pushed up to position the upper side of the predetermined lower mold 13 at the height of the pass line.
A desired punching process can be performed on the plate material by moving the plate material to the processing position by appropriately operating a known plate material movement positioning device (not shown) and lowering the striker 49.

An upper mold holder 9 provided with a predetermined upper mold 7 of another predetermined upper mold station 35a 'located at a substantially vertical exchange position during the punching process; The upper mold holder 9 provided with the predetermined upper mold 7 on the upper mold storage device 19 is moved to the upper mold changing device 23.
And replace as appropriate.

More specifically, the upper rotating drum 89a is appropriately moved in the front-rear direction by a predetermined amount via the servo motor 81 of the upper mold housing device 19, and the servo motor 1
By appropriately rotating the upper rotary drum 89a by a predetermined amount via the upper mold holder 13, the upper mold holder 9 held in the predetermined upper mold holding opening 93a is moved to the predetermined upper mold station 35a located at the exchange position. ′. Here, the replacement position corresponding to the predetermined upper mold station 35a 'means a position slightly shifted from a position facing the predetermined upper mold station 35a' in the left-right direction in this embodiment. Further, the first holder holding device 137 is opposed to the predetermined upper mold holder 9 of the upper upper rotating drum 89a to the left and right via the second transfer cylinder 143 and the regulating cylinder 147, and the second holder holding device 139 is moved. The predetermined upper mold holder 9 on the predetermined upper mold station 35a 'at the mold changing position is opposed to the left and right.

Next, the first holder gripping device 137 is moved to the left to approach a predetermined upper mold holder 9 on the upper rotating drum 89a via the first transfer cylinder 131 and the first slider 135, and is gripped. A pair of gripping arms 155, 1 of the first holder gripping device 137 are provided via a cylinder 173.
57 holds the predetermined upper mold holder 9. Then, the first holder holding device 137 is moved rightward away from the upper rotating drum 89a via the first transfer cylinder 131, and the predetermined upper mold holder 9 is detached from the predetermined upper mold holding opening 93a. . FIG. 1 schematically shows a turret punch press 1 according to the present embodiment, in which an upper rotary drum 89a and an upper turret device 11 are provided.
Is so large that the above-mentioned effect is achieved.

After the predetermined upper mold holder 9 is released from the upper mold holding port 93a, the first transfer cylinder 131
, The second holder holding device 139 is moved rightward to approach a predetermined upper mold station 35a 'located at the mold changing position. Then, the predetermined upper mold holder 9 on the predetermined upper mold station 35a 'is gripped by the second holder gripping device 139. Then, by moving the second holder gripping device 139 to the left away from the predetermined upper mold station 35a 'via the first transfer cylinder 131, the predetermined upper mold is moved from the predetermined upper mold station 35a'. The holder 9 can be detached.

After the predetermined upper mold holder 9 is removed from the predetermined upper mold station 35a ', the first holder holding device 137 is moved right and left to the predetermined upper mold station 35a' via the second transfer cylinder 143. In a position opposite to. Next, the first holder holding device 137 is moved rightward to approach the predetermined upper mold station 35a 'via the first transfer cylinder 131, and the predetermined upper mold holder 9 is moved to the predetermined upper mold station. 35
a 'via the upper holder holding member 37a. Then, the holding state of the first holder holding device 137 is released. Here, since the position where the upper mold holder 9 is gripped by the pair of gripping arms 157 and 159 of the first holder gripping device 137 is determined, the predetermined upper die holder 9 is moved to the upper holder holding member 37a. It can be held under a state having a predetermined direction. Then, the first holder gripping device 13 via the first moving cylinder 131
7 is moved leftward away from the predetermined upper mold station 37a '.

After moving the first holder holding device 137 to the left, the second holder holding device 139 holding the predetermined upper mold holder 9 via the second transfer cylinder 143 is moved to the front. Predetermined upper mold station 35
a ′. Also, the upper mold storage device 19
The upper rotating drum 89a is moved in the front-rear direction by a predetermined amount, and the predetermined upper mold holding port 93a (not holding the upper mold holder 9) is moved to the upper mold station 35.
a ′. And the first transfer cylinder 1
When the second holder holding device 135 is moved closer to the predetermined upper mold holding opening 93a via the base 31, the predetermined upper mold holder 9 is held in the predetermined upper mold holding opening 93a, and the second holder holding is performed. The gripping state of the device 139 is released.

With the above operation, the upper mold holder 9 and the upper mold 7 can be exchanged. The lower mold holder 15 and the lower mold 13 are also exchanged under the same operation. .

As described above, according to the present embodiment, only the predetermined lower mold 13 is located at a substantially horizontal position when the plate material is moved and positioned.
The plurality of lower molds 13 on 9b are not all located at substantially horizontal positions. Therefore, the plate material is less likely to be damaged by the interference of the lower mold 13.

The upper turret 29a (lower turret 29b) has a substantially truncated pyramid shape, and the center axis of the upper turret 29a (lower turret 29b) is inclined with respect to the upper frame 3 (lower frame 5). The provision of the upper and lower turrets 39a, 39 allows the predetermined upper mold station 35a '(lower mold station 35b') to be located at a substantially vertical mold changing position.
The upper die holder 9 (lower die holder 1) can be used during punching without considering the size of the gap of b.
5) The replacement of the upper mold 7 (lower mold 13) can be appropriately performed, and the effect of improving work efficiency is exhibited.

Further, a number of upper dies 7 (a number of lower dies 1) are stored in the upper die storage device 19 (lower die storage device 21).
Since 3) can be accommodated, various punching processes can be performed in combination with the upper die changing device 23 (lower die changing device), and the work efficiency is further improved.

FIGS. 8 and 9 show a composite turret punch press 185 according to the second embodiment. This composite turret punch press 185 includes two turret punch presses 1 of the first embodiment. Turret punch press 1
And the frames 3 and 5 of the other turret punch press 1 are integrated. In the figure, each component in the composite turret punch press 185 is assigned the same number as the corresponding component in the turret punch press 1, and the details are omitted.
It should be noted that the same effect as described above can be applied to the composite turret punch press 185 to further improve the effects of the first embodiment.

It should be noted that the present invention is not limited to the description of the embodiment as described above, but can be carried out in various other modes by making appropriate changes such as making the upper turret 29a a truncated cone. .

[0055]

As will be understood from the above description of the embodiment, according to the present invention, only the predetermined mold is located at a substantially horizontal position when the plate material is moved and positioned. Thus, the plurality of molds on the turret are not all located at a substantially horizontal position. Therefore, the occurrence of scratches on the plate material due to the interference of the mold is reduced.

Further, since the turret has a substantially polygonal truncated pyramid shape or a substantially truncated cone shape, and the center axis of the turret is provided to be inclined with respect to the frame, the predetermined mold station can be substantially perpendicular to the frame. The die can be positioned at the die changing position, and the die can be appropriately changed even during the punching process without considering the size of the gap between the upper and lower turrets, thereby improving the working efficiency. Things. Furthermore, since a large number of molds can be accommodated by holding a large number of molds respectively in a large number of mold holding portions provided on the rotary drum, various punching processes must be performed in combination with a mold changing device. Work efficiency is further improved.

When two turret punch presses are combined, the effect can be further improved.

[Brief description of the drawings]

FIG. 1 is a diagram along a line II in FIG. 2;

FIG. 2 is a schematic plan view of a turret punch press.

FIG. 3 is a diagram showing a main part of the present embodiment.

FIG. 4 is a view showing an upper mold holding portion of the upper rotary drum.

FIG. 5 is a diagram showing an upper mold changing device.

FIG. 6 is a view along the line VI-VI in FIG. 5;

FIG. 7 is a diagram showing a first holder holding device.

8 is a view along the line VIII-VIII in FIG.

FIG. 9 is a schematic plan view of a composite turret punch press according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Turret punch press 3 Upper frame 5 Lower frame 7 Upper die 9 Upper die holder 13 Lower die 15 Lower die holder 19 Upper die storage device 21 Lower die storage device 23 Upper die exchange device 29a Upper turret 35a Upper mold station 37a Upper holder holding member 89a Upper rotating drum 89b Lower rotating drum 93a Upper mold holding opening 93b Lower mold holding opening

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B21D 28/36 B23Q 3/157

Claims (2)

(57) [Claims] In a turret punch press, a substantially polygonal truncated pyramid-shaped or substantially truncated-cone-shaped turret is provided so that a central axis thereof is inclined with respect to a frame, and is rotatably provided about the central axis. A plurality of mold stations that hold a detachable mold on the side surface of the turret are provided at appropriate intervals in the circumferential direction, and the turret is rotated by a predetermined angle about a central axis to process a predetermined mold station substantially horizontally. When positioned at a position, the other predetermined mold station is configured to be located at a substantially vertical mold exchange position, and a rotating drum can be rotated about a rotation axis on one side of the turret and the rotation axis direction. And a plurality of mold holding portions for holding a detachable mold on the peripheral surface of the rotary drum, and a mold station located at the mold changing position. Turret punch press of the mold maintained, characterized by comprising providing a mold exchanging apparatus for exchanging a die of the die holding unit corresponding to the die exchanging position to. 2. A turret punch press comprising two turret punch presses each having the constitutional requirements according to claim 1, wherein a frame of one turret punch press and a frame of the other turret punch press are integrated. Punch press.