JPH0622505Y2 - Punch press - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a punch press, and more particularly to a punch press provided with a mechanism for automatically fixing and releasing a punch in the punch press.

[Technical Background of the Invention and Problems Thereof] In a punch press, a punch and die set of various shapes are prepared for punching various shapes on a plate-shaped workpiece. In order to automatically exchange the punch and die set, an automatic tool changer has been developed in the punch press. In order to exchange a set of punch and die by using this automatic tool changer, in a punch press, a ram or a lower end portion of a punch holder that moves up and down integrally with the ram and a die holder that supports the die have a punch, A lateral opening is typically provided to allow the die to be laterally mounted and dismounted.

By the way, since the shank portion of the punch is generally cylindrical, for example, a key or the like is required to regulate the directionality of the punch to a constant value. In the case of such a configuration, there is a problem that it is quite difficult to align the key and the key groove, and it is difficult to automatically perform punch exchange using the automatic tool changer.

[Object of the Invention] The present invention has been devised in view of the above-mentioned conventional problems, and an object of the present invention is to automatically and easily perform the attachment / detachment replacement of the punch without paying attention to the directionality of the punch. It aims to provide a punch press that can.

[Outline of the Invention] In order to achieve the above object, in the present invention, a punch holder for supporting a punch is integrally connected to a ram vertically movable in a punch press, and is provided above the punch. A flange portion that can be gripped by a tool changing device provided in the punch press is provided, and a cross-sectional shape of the locking portion that protrudes upward from the flange portion has a V-shaped locking hole formed in a lower portion of the punch holder. The shape holder is formed to have a V-shaped abutting side surface that can be engaged and disengaged, and the punch holder is provided with a hook member for pressing the locking portion of the punch to the V-shape portion. is there.

[Embodiment of the Invention] Referring to FIGS. 1 and 2, a punch press 1 includes an upper frame 7 supported in a cantilever manner on a column portion 5 standing on one side of a base frame 3. It has a C-shaped frame. In the throat portion 9 of the C-shaped frame, a sub-column portion 11 is provided upright in the vicinity of the column portion 5,
A beam member 13 extending along the upper frame 7 is supported by the sub column portion 11 in a cantilever manner.

A punch holder 17 for supporting the punch 15 is rotatably supported by the tip end of the beam member 13 so as to be vertically movable and rotatable, as will be described later. A die holder 21 that supports a die 19 corresponding to the punch 15 is rotatably provided on the other side of the base frame 3 so as to face the holder 17. In order to move the punch holder 17 up and down, a ram 23 is movably supported at the tip of the upper frame 7, and the ram 23 and the punch holder 17 are appropriately connected. The ram 23 is appropriately interlocked with an eccentric portion of an eccentric shaft 25 rotatably supported on the tip portion of the upper frame 7 via a connecting rod 27. The eccentric shaft 25 is appropriately interlocked with a motor 29 mounted on the upper frame 7 via an appropriate clutch device 31. The configuration in which the ram 23 is moved up and down by the rotation of the motor 29 may be a general configuration, and therefore a detailed description thereof will be omitted.

With the above configuration, the ram 23 is moved up and down by the drive of the motor 29, so that the punch holder 17 is integrally moved up and down. Therefore, it will be understood that by positioning the plate-shaped workpiece W between the punch 15 and the die 19, the workpiece W can be punched.

In order to move and position the workpiece W, the front side of the base frame 3 (left side in FIGS. 1 and 2).
A work movement positioning device 33 is arranged at the position. The work moving / positioning device 33 includes the punch 1
The workpiece W is moved and positioned in the X-axis and Y-axis directions with respect to the machining position by the die 5 and the die 19, and may be of a general configuration adopted in, for example, a turret punch press. Therefore, the detailed description of the configuration will be omitted. Further, the base frame 3 is provided with a conveyor device 35 for carrying out a product or scrap processed by the punch 15 and the die 19 in the backward direction. The die device 19 side of the conveyor device 35 is, for example, an air blower. It is provided so as to move up and down by an appropriate actuating device (not shown) such as a cylinder.

Therefore, while the workpiece W is automatically positioned by the workpiece movement positioning device 33 in the X-axis and Y-axis directions, the workpiece W is automatically processed by the punch 15 and the die 19. Processing will be performed. It will be appreciated that the product or scrap produced in the above process may be automatically transferred backwards by the conveyor device 35.

In order to attach / detach the punch 15 and the die 19 to / from the punch holder 17 and the die holder 21, a tool changing device 37 is attached to the tip end side of the beam member 13. Also, a large number of punches 15 and dies 1 for attachment / detachment replacement
The beam member 13 is provided with a disc-shaped tool magazine 39 for accommodating the nine tools. The tool magazine 39 is located above the pass line along which the workpiece W is moved, and is supported by a rotary shaft 43 that is rotatably suspended by a bearing device 41 mounted on the beam member 13. The tool magazine 39 has punches 15,
A large number of tool holders 45 capable of holding the die 19 as a set or holding only the die 19 are provided.

The tool magazine 39 is configured so that a desired tool holder 45 can be indexed at a predetermined position by being rotated by an appropriate motor (not shown). When the tool holder 45 is indexed to a predetermined position, the tool of the punch 15 and the die 19 can be received from the tool changing device 37 and the tool can be passed to the tool changing device 37 at a predetermined position. ing.

Therefore, the desired tool holder 4 of the tool magazine 39
5 is indexed to a predetermined position, and the tool changer 37 is appropriately operated to move the punch holder 17 and the die holder 21.
It will be appreciated that replacement of the punch 15 and die 19 with respect to can be done.

As shown in detail in FIG. 3, the punch holder 17
Is rotatably and vertically supported by a bearing housing 47 attached to the tip of the beam member 13. That is, a cylindrical bosp spline housing 51 having a worm gear 49 at the center of the outer periphery is rotatably supported in the bearing housing 47 via a suitable number of bearings 53, and the punch holder is in the ball spline housing 51. 17 is supported movably up and down via a large number of balls. The punch holder 17 and the bose spline housing 51 are formed into a ball spline via a ball.
The punch holder 17 is configured to rotate integrally. A worm 55 rotated by a servo motor (not shown) is meshed with the worm gear 49.
Therefore, the punch holder 17 can be appropriately rotated by the servo motor.

In order to move the punch holder 17 up and down, the punch holder 1
The upper end of 7 is connected to the ram 23. More specifically, a head member 57 having a flange portion 57F at the upper end is provided on the upper portion of the punch holder 17. A connecting bracket 61 having a shear plate 59 is attached to the lower end of the ram 23 via a plurality of bolts, and the head member 5 is attached to the connecting bracket 61.
The flange 57F of 7 is a T-slot 61T in which the flange 57F can be engaged and disengaged in the lateral direction.
Are formed. Therefore, it will be understood that the punch holder 17 moves up and down integrally with the up and down movement of the ram 23.

An appropriate punch lock device is provided below the punch holder 17 so that the punch 15 can be automatically attached to and detached from the punch holder 17. More specifically, a holder block 63 is integrally attached to the lower end portion of the punch holder 17 with a plurality of bolts, and the holder block 63 is upwardly attached from a flange portion 15F provided on the upper portion of the punch 15. A locking hole 65 is formed so as to be able to receive the locking portion 15L having a substantially triangular cross section (see FIG. 4) formed in a protruding manner from below. The locking hole 65 is
As shown in FIG. 4, the locking portion 15 of the punch 15 is
V corresponding to the V-shaped abutment side surface 15S formed on L
The character-shaped portion 65V is formed in a shape in which it is connected to the lower portion of the circular-shaped portion 65C.

A substantially cylindrical lock actuating member 67 is vertically movably fitted in the circular portion 65C of the locking hole 65.
The locking portion 1 of the punch 15 is provided in the lock operating member 67.
A hook member 69 capable of locking 5L is swingably supported via a pin 71. The pin 71 is supported by the holder block 63 by penetrating a vertically elongated hole 67H formed in the lock actuating member 67. Therefore, the lock actuating member 67 can move up and down with respect to the hook member 69.

In order to lock the locking portion 15L of the punch 15, the lower end portion of the hook member 69 is provided with a lateral projecting portion 15P formed on the upper end portion of the locking portion 15L and a projecting portion 69P that can be engaged and disengaged. In addition to being formed, an inclined surface portion 69S is formed on the side opposite to the protruding portion 69P. Also, the hook member 69
A pin 73 protruding in the same direction as the inclined surface portion 69S is provided near the upper end of the. The hook member 6
In order to make the rocking member 9 swing, an inclined surface 67S which can be engaged with and disengaged from the inclined surface portion 69S of the hook member 69 is formed at the inner lower end portion of the lock operation member 67, and the pin 73 is engaged with the upper surface side. A detachable step 67ST is formed. In addition, the lock actuating member 67 causes the locking portion 15 of the punch 15
A notch is formed at a position corresponding to L. Further, at the upper end of the lock operating member 67, the lock operating member 6
7, which is engaged with the lower end portion of the piston rod 77 in the fluid pressure cylinder 75 as a drive device for moving the No. 7 up and down.
The groove 67T is formed.

The fluid pressure cylinder 75 is provided in the punch holder 17 and is vertically movable.
A flange portion engaged with the T groove portion 67T is formed at the lower end portion of the. The fluid pressure cylinder 75 is used for the punch holder 17
The rotary joint member is operated by the working fluid supplied and discharged through the flow passage 79 formed in the above. The flow passage 79 is mounted on the head member 57 so as to be relatively rotatable. It is connected to 81. The rotary joint member 81 includes a stopper 8 fixed to the connection bracket 61.
Only the rotation is blocked by the restriction member 85 engaging with 3.

In the above configuration, when the working fluid is supplied to the fluid pressure cylinder 75 via the rotary joint member 81 and the flow passage 79 to lower the lock operating member 67, the inclined surface 67S of the lock operating member 67 causes the inclined surface 67S of the hook member 69 to move. By contacting 69S, the hook member 69 is swung in the counterclockwise direction in FIG. Therefore, the protruding portion 69P of the hook member 69 acts to press the locking portion 15L of the punch 15 against the V-shaped portion 65V of the locking hole 65 and push up the protruding portion 15P of the locking portion 15L upward. Then, the punch 15 is fixed to the holder block 63. Therefore, the punch 15 is fixed with the upper surface of the flange portion 15F in surface contact with the lower end surface of the holder block 63. Further, the reaction force when the hook member 69 fixes the locking portion 15L of the punch 15 and the lateral component force acting on the punch 15 at the time of nibbling are
Since the holder block 63 receives the lock actuating member 67, the lock actuating member 67 does not need to be heavy and rigid, and can be relatively compact.

Contrary to the above, when the piston rod 77 of the fluid pressure cylinder 75 is actuated in the upward direction, the step portion 67ST of the lock actuating member 67 comes into contact with the pin 73, causing the hook member 67 to move.
It can be seen in FIG. 3 that the punch 15 is unlocked and can be taken out downwards by pivoting in the clockwise direction.

Further, referring to FIGS. 3 and 4, the holder block 63 is provided with a stripper holder 89 for supporting a stripper 87 surrounding the punch 15.
The stripper holder 89 is formed in such a manner that an annular part thereof is cut open for inserting and removing the stripper 87, and the stripper holder 89 is engaged with and disengaged from a peripheral groove 87G formed on the peripheral surface of the stripper 87. Freely arcuate support 89
H is formed. The stripper holder 89 also includes
An appropriate number of ball snaps 91 for holding the stripper 87 are provided. The stripper holder 89 is supported by a plurality of support pins 93 supported by the holder block 63 so as to be vertically movable. Between the stripper holder 89 and the holder block 63, a coil spring such as a coil spring is provided. The ammunition 95 is mounted.

Therefore, when the workpiece W is punched by the punch 15, the workpiece W is pressed by the stripper 87, and the punch 1 from the workpiece W is pressed.
It is possible to reliably carry out the withdrawal of No. 5.

The attachment / detachment of the die 19 to / from the die holder 21 is performed by moving the die 19 horizontally with respect to the die holder 21, and the fixing of the die 19 to the die holder 21 may be the same as the conventional one. Therefore, the description of the detailed configuration will be omitted.

Referring to FIG. 5 and FIG. 6, the tool changing device 3
7 includes a first tool changing arm 97 and a second tool changing arm 99. The first tool changing arm 97 includes the punch holder 17 and the die holder 21.
The punch 15, the die 19 and the stripper 87 are removed and stored in the tool holder 45 of the tool magazine 39. In addition, the second tool changing arm 99
Is for taking out the punch 15, the die 19 and the stripper 87 housed in the tool holder 45 of the tool magazine 39 and mounting them on the punch holder 17, the die holder 21 and the stripper holder 89. As is apparent from FIG. 6, the first and second tool changing arms 97 and 99 are arranged with a phase difference of 90 °, and are individually operably provided.

Since the configuration of the first tool changing arm 97 and the configuration of the second tool changing arm 99 are symmetrical, the configuration of one first tool changing arm 97 will be described in the following description. Regarding the second tool exchanging arm 99, the same reference numerals are given to the components having the same functions as those of the first tool exchanging arm 97, and the detailed description thereof is omitted.

Referring to FIG. 5, the bearing device 1 is attached to the bracket 101 attached to the beam member 13 (not shown in FIG. 5).
A swivel shaft 105 is rotatably supported via 03. The swivel shaft 105 is an appropriate drive device (not shown).
It is rotated by 90 ° and 180 ° in the forward and reverse rotation directions.

Referring to FIGS. 5 to 7, the upper and lower portions of the pivot shaft 105 are L-shaped support brackets 10, respectively.
Almost central portions of 7U and 107D are integrally fixed by a key or the like. Upper and lower support brackets 107U, 10
A guide bar 109 for vertically guiding the first tool changing arm 97 is vertically supported on one end of the 7D. Also, the upper and lower support brackets 107U and 107
On the other end side of D, a separate guide bar 109 for vertically guiding the second tool changing arm 99 is vertically supported.

In order to move the first tool changing arm 97 up and down, an elevating block 111 is supported by the guide bar 109 so as to be movable up and down, and upward from a fluid pressure cylinder 113 provided integrally with the elevating block 111. The upper end of the piston rod 115 extended to the upper side is the upper support bracket 1
It is connected to a connecting bracket 117 fixed to 07U. Therefore, by appropriately operating the working fluid to the fluid pressure cylinder 113, the lifting block 111 is moved.
Moves up and down along the guide bar 109.

In order to reciprocate the first tool exchanging arm 97 in the horizontal direction, the elevating block 111 is integrally provided with a horizontally extending rail support plate 119. The rail support plate 119 has a guide rail 121. Are installed horizontally. A slide block 123 is supported by the guide rail 121 for reciprocating movement itself, and a connecting plate 125 is integrally attached to the slide block 123.
A fluid pressure cylinder 129 is supported on the rail support plate 119 via a T-shaped support bracket 127, and a tip end portion of a piston rod 131 provided reciprocally in the fluid pressure cylinder 129 is It is connected to the connecting plate 125 via an appropriately bent connecting member 133.

Therefore, by appropriately operating the fluid pressure cylinder 129, the connecting plate 125 and the like are moved to the guide rail 12.
It will be appreciated that it can be reciprocated along 1.

A base portion of an arm plate 135 that extends across the lower position of the guide rail 121 in a direction orthogonal to the guide plate 121 is integrally fixed to the connecting plate 125. , The upper plate 137U and the lower plate 13 facing each other vertically.
A substantially C-shaped arm bracket 137 having 7D is integrally attached. This arm bracket 137
The upper finger 139 that can hold the punch 15 freely.
Also, a lower finger 141 capable of gripping the die 19 is supported.

With the above configuration, the upper and lower fingers 139 and 141 are moved forward and backward by the operation of the fluid pressure cylinder 129, and the punch 1 is moved relative to the punch holder 17 and the die holder 21.
5, it will be understood that the mounting and dismounting of the die 19 can be performed.

Referring to FIG. 8 to FIG. 10, two pivots 143A and 143B are vertically provided between the upper and lower plates 137U and 137D of the arm bracket 137 with appropriate intervals. One die gripping member 1 in the lower finger 141 is provided below the one pivot 143A.
The base of 45A is pivotally supported, and the base of the other die gripping member 145B is pivotally supported at the lower part of the other pivot 143B. The pair of die gripping members 145A and 145B are formed symmetrically, and each of the die gripping members 145A and 145 is formed.
B is urged in a direction to close each other by a coil spring 147 stretched between them.

The die gripping members 145A and 145B are engageable and disengageable with one of a plurality of engagement holes 19H formed on the side surface of the die 19 at appropriate intervals for gripping the die 19.
9 is provided at each of the tip end portions thereof, and the engagement protrusion portion 15 is engageable with the groove portion 19G formed on the peripheral surface of the die 19.
1 is provided for each. Further, each die holding member 145
A and 145B are respectively provided with stripper support portions 153 that support the stripper 87, and
Engagement protrusion 1 that is engageable with the peripheral groove 87G of the stripper 87
55 are formed respectively.

With the above structure, the coil spring 147, the engaging pin 149, and the engaging protrusion 15 are moved by relatively moving the die 19 between the die gripping members 145A and 145B.
By the action of 1, both die gripping members 145A, 145B
It will be appreciated that the die 19 may be gripped during In addition, the die 1 is inserted between the die holding members 145A and 145B.
It will be appreciated that withdrawing the die 9 relative to one another can facilitate removal of the die 19. Further, it will be appreciated that the stripper 87 may be releasably supported by both die gripping members 145A, 145B.

Referring again to FIG. 8 and FIG. 10, the upper finger 139 has a pair of symmetrically shaped punch gripping members 157A,
157B, each punch gripping member 15
The bases of 7A and 157B are connected to the respective pivots 143A and 143.
It is vertically supported by B. Each punch gripping member 1
57A and 157B are urged in a direction to close each other by the action of a coil spring 159 stretched between them. Further, at the tip of each punch gripping member 157A, 157B, one engaging hole 15H formed on the side surface of the flange portion 15F of the punch 15 and spaced apart from each other is provided, and an engaging pin 161 that can be disengaged. Has been. Further, each of the punch gripping members 157A, 157B is formed with an engaging protrusion 163 which is engageable with and disengageable from the groove 15G formed in the flange 15F of the punch 15.

With the above configuration, the die gripping members 145A, 145
It will be appreciated that the punch 15 can be gripped between each punch gripping member 157A, 157B, just as the die 19 can be gripped between B.

In order to engage and disengage the engaging portion 15L of the punch 15 with respect to the engaging hole 65 of the holder block 63 provided at the lower end portion of the punch holder 17, each punch gripping member 15
7A, 157B to move up and down, the upper plate 137U of the arm bracket 137, the mini cylinder 16
5 is installed. A piston rod 167, which is vertically movable in the mini cylinder 165, is located between the punch gripping members 157A and 157B. The piston rod 167 is provided on both punch gripping members 157A, 15
7B is provided with a large enough washer 169 which does not come off even when both punch holding members 157A and 157B are opened.

It will be understood that, with the above configuration, by appropriately operating the mini cylinder 165, both punch gripping members 157A, 157B are guided by the pivots 143A, 143B to move up and down.

As will be understood, the first tool change arm 97 reciprocates in the horizontal direction, and the upper finger 139 of the first tool change arm 97 can be moved up and down with respect to the lower finger 141. The second tool changing arm 99 also performs the same operation as the first tool changing arm 97. Further, by rotating the swivel shaft 105, the first and second tool exchanging arms 97, 99 are simultaneously swung horizontally.

Referring to FIG. 11, FIG. 11 shows a tool exchanging process schematically showing the function of the tool exchanging device 37 having the above-mentioned configuration. That is, (1) in FIG. 11 is
Both the first and second tool changing arms 97 and 99 are punch 1
5, the die 19 is not gripped. In the state (1), the first tool exchanging arm 97 has the same height so as to remove the punch and the die mounted on the tool mounting portion (shown by (P) in FIG. 11) of the punch press. To descend. Further, the second tool changing arm 99 moves forward so as to take out the punch and die mounted on the tool magazine (shown by (M) in FIG. 11). Therefore, the state changes to (2).

In the state of (2), the upper finger 139 of the first tool changing arm 97 rises to correspond to the height position of the punch attached to the punch press. Also,
The second tool changing arm 99 takes out the punch and the die from the tool magazine and retracts. Therefore, the state changes to (3).

In the state of (3), the first tool change arm 97
However, it moves forward to remove the punch and die attached to the punch press. The second tool changing arm 99 is on standby, and changes to the state (4).

In the state of (4), after the fixing of the punch and die attached to the punch press is released, the upper finger 139 of the first tool changing arm 97 is lowered to lower the punch, and (5) Changes to the state of. The second tool changing arm 99 is on standby.

In the state of (5), the first tool exchanging arm 97 is retracted to remove the punch and die, and (6)
Changes to the state of. The second tool changing arm 99 is on standby.

In the state of (6), the first tool exchanging arm 97 is raised to its original position to perform the turning, and the state changes to the state of (7). The second tool changing arm 99 is on standby.

In the state of (7), 90 ° is turned, the second tool exchanging arm 99 corresponds to the tool mounting portion of the punch press, and the state changes to (8).

In the state of (8), the second tool change arm 99 is
The tool is lowered to the same height as the tool mounting portion of the punch press, and the state changes to (9). During this time, the first tool changing arm 97 is on standby.

In the state (9), the second tool change arm 99 is
The punch and die move forward to be mounted on the tool mounting portion of the punch press, and the state changes to (10). The first tool change arm 97 is on standby.

In the state of (10), the upper finger 139 of the second tool exchanging arm 99 rises to mount the punch and changes to the state of (11). The first tool change arm 97 is on standby.

When the punch and the die are fixed in the state of (11), the second tool exchanging arm 99 retracts, and (12)
Changes to the state of. The first tool change arm 99 is on standby. In the press machine, punching with the newly installed punch and die is started.

In the state of (12), the second tool exchange arm 99 is returned to the original raised position and the upper finger 1
39 is lowered and changes to the state of (13). The first tool change arm 97 is on standby.

In the state of (13), the first and second tool exchanging arms 97, 99 are rotated 180 ° in the opposite direction to the above,
In the state of (14), the first tool exchanging arm 97 corresponds to the tool magazine.

In the state (14), the first tool exchange arm 97
Moves to store the grasped punch and die in the tool magazine, transfers the punch and die to the tool holder in the tool magazine, and changes to the state (15). Second
The tool change arm is on standby.

In the state of (15), the first tool exchange arm 97 retracts to return to the original state and changes to the state of (16).

By turning 90 ° in the direction of the arrow in the state of (16), the original state of (1) is restored.

As can be understood from the above process, the first tool exchanging arm 97 acts to remove the punch and die mounted on the punch press and store them in the tool magazine. The second tool exchanging arm 99 serves to take out the punch and die housed in the tool magazine and mount them on the tool mounting portion of the punch press. Therefore, it is possible to extremely shorten the time for tool exchange. In addition, the upper fingers 1 of the first and second tool changing arms 97 and 99.
Since the upper and lower fingers 39 can move up and down,
When maintaining 9 in the lowered state, lower finger 1
It is also possible to replace only the die by using only 41. That is, when the punching shape and size are the same and the plate thickness of the work piece changes, it functions to adjust the clearance between the punch and the die.

[Effects of the Invention] As can be understood from the above description of the embodiments, since the gist of the present invention is as described in the scope of claims for utility model registration, the punch 15 is locked according to the present invention. Since the sectional shape of the portion 15L is formed to have a V-shaped abutting side surface 15S that can be engaged with and disengaged from the V-shaped portion 65V of the locking hole 65 formed in the lower portion of the punch holder 17, the punch is formed. The directionality of the punch 15 is restricted by simply mounting the punch 15 on the holder 17. Therefore, the punch 15 can be easily attached and detached and replaced by using the automatic tool changer 37.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and FIG. 1 is a side view of a punch press embodying the present invention, showing a partial cross section. FIG. 2 is a plan view of the same. FIG. 3 is an enlarged cross-sectional view showing in detail an arrow III portion in FIG. FIG. 4 is a partial cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is an enlarged detailed view taken along the line VV in FIG. FIG. 6 is a plan view of FIG. FIG. 7 is the sixth
FIG. 7 is a sectional view of a main portion taken along the line VII-VII in the figure. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. FIG. 9 is a bottom view of FIG. FIG. 10 is a right side view of FIG. 8 showing only the main part. First
FIG. 1 is a schematic process explanatory diagram of tool exchange. 15 ... Punch, 15 L ... Locking part 17 ... Punch holder, 23 ... Ram 65 ... Locking hole, 69 ... Hook member

Claims (1)

[Scope of utility model registration request] 1. A punch holder 17 for supporting a punch 15 is integrally connected to a ram 23 vertically movable on the punch press 1, and a tool provided for the punch press 1 is provided above the punch 15. A flange portion 15F that can be gripped by the exchanging device 37 is provided, and the cross-sectional shape of the locking portion 15L protruding upward from the flange portion 15F has a V-shaped locking hole 65 formed in the lower portion of the punch holder 17. The hook member 69 is formed to have a V-shaped abutting side surface 15S that can be engaged and disengaged with the portion 65V, and presses the locking portion 15L of the punch 15 to the V-shaped portion 65V in the punch holder 17. A punch press characterized by comprising: