JPH1147849A - Die changing device in punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a die changing operation and to ensure the locking state between a changer lever and the locking part of a die block. SOLUTION: A changer plate 81 is provided within the changer main body 77 of a die changing device 59 so as to freely move in the nearly horizontal direction, a changer lever 79 is protruded in the forward end of the changer plate 81 and a guide member 93 is provided in the changer plate 81. When the changer plate 81 is horizontally moved with a changer plate driving means, since the guide member 93 is guided and moved from the diagonal forward to the lateral direction toward the die block installing position side along the cam groove 95 of a cam plate 97 provided in the changer main body 77, the changer lever 79 is moved with the same locus and the locking part 87 of the changer lever 79 is engaged with the locking part 85 of a die block 25 from the nearly horizontal direction. This locking state is sure and then not easily unlocked even though the changer main body 77 is vertically vibrated when moving.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die changing device for a punch press.

[0002]

2. Description of the Related Art Conventionally, a punch press 201 has a portal-shaped main body frame 20 which is erected as shown in FIG.
The main body frame 203 has a lower frame 205 and an upper frame 207 integrated with a side frame (not shown). The lower frame 205 and the upper frame 207 each have a die block 209 in which a plurality of dies D and punches P are mounted in a base shape,
Punch blocks 211 are provided opposingly movable in the Y-axis direction (vertical direction in FIG. 8).

[0003] Nut members 213 and 215 are integrated with the die block 209 and punch block 211, and Y-axis ball screws 217 and 219 extending in the Y-axis direction are screwed to the nut members 213 and 215. Have been. The upper ends of the Y-axis ball screws 217 and 219 in FIG. 8 are rotatably supported by bearings 221 and 223, and the Y-axis ball screws 217 and 219 in FIG.
, The lower end is connected to the Y-axis drive motors 225, 227.

When the Y-axis drive motors 225 and 227 are driven, the Y-axis ball screws 217 and 219 are rotated, so that the die block 209 and the punch block 211 move in the Y-axis direction via nut members 213 and 215. Will be moved to The Y-axis drive motors 225 and 227 are driven in synchronization with each other, and the die block 209 and the punch block 211 are moved in synchronization.

A ram cylinder (not shown) for pressing the punch P via a ram (not shown) is provided above the punch block 211, and the ram cylinder moves in the U-axis and V-axis directions. Then, the punch W is positioned above the desired punch P, and is punched through the ram by the operation of the ram cylinder, whereby the work W is punched by the cooperation of the punch P and the die D.

As shown in FIG. 8, a first work table 229 extends in the X-axis direction on the work loading side (the right side in FIG. 8) of the punch press 201, and the work unloading side (FIG. 8). On the left), a second work table 231 is extended in the X-axis direction.
29 and 231 are provided with first and second work movement positioning devices 233 and 235 for moving and positioning the clamped work W in the X-axis direction.

More specifically, in the first work movement positioning device 233 on the work carry-in side, as shown in FIG. 8, a carriage ball rotated forward and reverse by a carriage drive motor 237 along a first work table 229. The screw 239 is extended in the X-axis direction,
1 is moved in the X-axis direction via a nut member (not shown) screwed into the carriage ball screw 239.

The carriage 241 is provided with two clamps 243 for gripping one side edge of the work W on the first work table 229.

In the second work movement positioning device 235 on the work unloading side, the first work movement positioning device 2 described above is used.
33, the same parts are denoted by the same reference numerals, and redundant description will be omitted.

The work W is moved and positioned on the first work table 229 by the first work movement positioning device 233, and the left half of the work W is punched. Thereafter, the remaining right half of the work W is moved and positioned by the second work movement positioning device 235, and is punched.

As a conventional mold changing method for a punch press 201, for example, a punch block 211 provided with a plurality of punches P and a plurality of dies D as shown in FIG.
The die block 245 including the die block 209 provided with is mounted on a die frame (not shown) that moves in the Y-axis direction.

When the mold block 245 is removed from the mold frame for exchanging the mold composed of the punch P and the die D, the detached mold block 245 is held by the changer device 247 and adjacent to the punch press 201. It is conveyed to the mold exchange position K at the intersection with the provided mold setup table 249.

As shown in FIG. 9, the changer main body 251 is engaged with two endless annular chain conveyors 255 meshed with, for example, a plurality of sprockets 253a supported on a changer base 253. The chain conveyor 255 is rotatably driven by a driving means such as a driving motor, so that the punch press 201 is movably provided between a die block mounting position S and a die exchange position K.

A changer lever 259 is provided at the front end of the changer main body 251 so as to be detachable from the engaging portion 257 of the die block 209.

The changer lever 259 is, for example, as shown in FIGS.
The hook portion 261 provided at the front end of the die 59 is configured to be hooked on the locking portion 257 of the die block 209 from below.

The hook portion 261 of the changer lever 259
The die block hooked on the locking portion 257 of the die block 209 is pulled out to the die changing position K by the change of the changer body 251 due to the rotation of the chain conveyor 255.

After the mold block 245 is detached from the changer device 247 at the mold exchange position K, it is moved to the mold setup table 249, and the change of the mold and the alignment of the punch P and the die D are performed by the mold setup. This is done in table 249.

The other mold blocks exchanged at the mold setup table 249 are changed at the mold exchange position K at the changer device 24.
The hook portion 261 of the seventh changer lever 259 is hooked on the locking portion 257 of the die block 209, and is pushed to the front mold block mounting position S by the pusher shaft 263 protruding from the front end of the changer device 247.

[0019]

By the way, in the above-described conventional mold exchanging method in the punch press 201, the hook portion 261 of the changer lever 259 is moved up and down by the pulling force of the chain conveyor 255 when the changer device 247 is pulled up and down. Thus, there is a problem that the hook portion 261 of the die 259 comes off the locking portion 257 of the die block 209.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a mold for a punch press which ensures a locked state between a changer lever and a locking portion of a mold block. An exchange device is provided.

[0021]

According to one aspect of the present invention, there is provided a die changing apparatus for a punch press according to the present invention, comprising a punch block having a plurality of punches and a die block having a plurality of dies. A mold exchanging device for carrying the mold block between a mold block mounting position and a mold exchanging position in the punch press in order to exchange a mold block for a punch press. A changer plate is movably provided in a substantially horizontal direction in a changer body provided reciprocally between a mounting position and a mold changing position, and a locking portion provided on the die block at a front end of the changer plate. And a guide member is provided on the changer plate, and the guide member is mounted on the mold block in a substantially horizontal direction. The changer body is provided with a cam plate having a cam groove for guiding the diagonal front from the front toward the position sideways from side to side, and the changer plate is driven in a horizontal direction so that the cam roller reciprocates along the cam groove of the cam plate. The changer plate driving means is provided on the changer body.

Therefore, when the changer plate driving means is operated and the changer plate moves in the changer body in a substantially horizontal direction, the guide member provided on the changer plate moves along the cam groove of the cam plate to the mold block mounting position. It is guided from the diagonal front toward the side and moves in the lateral direction. Along with this, the changer lever at the front end of the changer plate also moves laterally from diagonally forward through the same trajectory as the guide member, so that the locking portion of the changer lever is substantially horizontal to the locking portion of the die block. Engage.

At this time, since the locking portion of the changer lever is engaged with the locking portion of the die block from the horizontal direction, the locking state is assured. Therefore, when the changer body moves on the chain conveyor. Even if it vibrates vertically, the locking portion of the changer lever does not come off from the locking portion of the die block.

When the changer body advances to the mold block mounting position side, the die block is pushed forward at the front end of the changer lever, so that the conventional pusher shaft is unnecessary.

According to a second aspect of the present invention, there is provided a die changing apparatus for a punch press according to the present invention, wherein the locking portion of the changer lever is provided on an outer periphery of a tip end of the changer lever. And a locking portion of the die block is formed of a T-shaped groove which is capable of engaging and disengaging the protrusion of the changer lever in the horizontal direction.

Therefore, the projecting locking portion of the changer lever is fitted and engaged from the horizontal direction into the groove having a T-shaped cross section of the locking portion of the die block, so that the locking state is reliable.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method and an apparatus for exchanging a die in a punch press according to the present invention will be described below with reference to the drawings. The punch press will be described with reference to a uniaxially movable punch press, but is not limited to this model.

Referring to FIG. 5 and FIG. 6, the uniaxially movable punch press 1 is provided with a portal-shaped frame 3 erected, and this frame 3 is composed of a lower frame 5 and an upper frame 7. It is integrated with the side frame 9.

The frame 3 is provided with a plurality of upper linear guide rails 11 and lower linear guide rails 13 extending in the Y-axis direction (vertical direction in FIG. 5 and horizontal direction in FIG. 6). Guide rail 1
The punch block frame 17 and the die block frame 19 are integrally provided on the base members 1 and 13 with a C-shaped connecting member 21 via a plurality of linear guides 15. A punch block 23 having a plurality of punches P is mounted in the punch block frame 17, and a die block 25 having a plurality of dies D is mounted in the die block frame 19. I have.

The drive system for moving the integrally provided punch block frame 17 and die block frame 19 in the Y-axis direction includes the punch block frame 1
7 is provided with a ball screw 27 screwed in the Y-axis direction, and a Y-axis drive motor 29 is provided on one side of the ball screw 27.

With the above configuration, when the Y-axis drive motor 29 is driven, the ball screw 27 rotates and the punch block frame 17 and the die block frame 19 are moved in the Y-axis direction via a nut member (not shown). Will be.

A ram carriage 31 is provided in the punch block frame 17 in the V-axis direction (the horizontal direction in FIG. 6).
It is provided movably to. More specifically, the ram carriage 31 is mounted on the upper linear guide rail 11 via a linear guide 33 and is movable in the V-axis direction. A drive system for moving the ram carriage 31 in the V-axis direction includes a ball screw 3 connected to an output shaft of a V-axis drive motor 35 provided on the punch block frame 17.
7 is screwed into a nut member (not shown) mounted on the ram carriage 31.

With the above configuration, when the V-axis drive motor 35 is driven, the ball screw 37 rotates, and the ball screw 3
The ram carriage 31 is moved in the V-axis direction via a nut member screwed into the nut 7.

A ram cylinder 39 for hitting the punch P is movable in the ram carriage 31 in the U-axis direction (a direction perpendicular to the drawing in FIG. 6). As a drive system for moving the ram cylinder 39 in the U-axis direction, a ball screw connected to a U-axis starting motor is screwed to a nut member provided on the ram cylinder 39, although not shown.

With the above arrangement, when the U-axis drive motor is driven, the ram cylinder 3 is connected via the ball screw and the nut member.
9 is moved in the U-axis direction, and the ram cylinder 39 is moved in the V-axis direction, whereby the positioning is performed immediately above the desired punch P among the plurality of punches P.

Referring to FIG. 7, a plurality of engagement holes 41 are formed on the lower surface of the punch block 23, and the shot pins 4 engaging with the engagement holes 41 are formed in the die block 25.
3 is provided to be vertically movable. Further, a shot pin raising cylinder 45 for moving the shot pin 43 up and down is provided on the die block frame 19.

With the above configuration, when the punch block 23 and the die block 25 are exchanged, the punch block 23
When the punch block 23 is removed from the punch block frame 17, the punch block 23 falls under its own weight, and the engaging hole 41 formed on the lower surface of the punch block 23 engages with the shot pin 43 to form a predetermined gap and punch on the die block 25. Block 23
Is placed. Further, when the punch block 23 and the die block 25 can be attached, when the shot pin raising cylinder 45 is operated, the punch block 23 is lifted up via the shot pin 43 and the punch block 23 is set on the punch block frame 17. .

Tables 47A and 47B are disposed before and after the frame 3 (right and left in FIG. 5), and the work W carried on the tables 47A and 47B is held by a plurality of clamps 49A and 49B. 49
A and 49B are provided in the carriages 51A and 51B. The carriages 51A and 51B are connected to the table 47.
X-axis direction on one side of A, 47B (left-right direction in FIG. 5)
It is provided on a guide rail 53A, 53B extending and laid through a guide member (not shown). The carriages 51A and 51B are screwed into ball screws 55A and 55B extending in the X-axis direction. One end (upper and lower sides in FIG. 5) of the ball screws 55A and 55B is connected to an X-axis drive motor. 57A and 57B are connected.

With the above structure, the work W carried into the table 47A is gripped by the clamp 49A and moved by the carriage 51A in the X-axis direction. The punch block frame 17 and the die block frame 19 provided on the frame 3 move in the Y-axis direction, and the desired punches P and dies D are positioned at desired processing positions of the work W.
Then, the ram cylinder 39 operates, and the punch P and the die D
The work W is punched in cooperation with the above.

When the work W is further punched, the work W advances to the left in FIG.
The work W is returned from A to the clamp 49B to perform punching. Therefore, the clamp 49A,
Since 49B does not enter the frame 3, the connecting member 2
1 and no dead zone.

A changer device 59 (die changing device) is provided above the lower frame 5 of the frame 3 in FIG. 5 and on the right side in FIG. This changer device 59 pulls out a mold block 61 composed of the punch block 23 and the die block 25, and
The die block 6 moves to the die exchange position K at the intersection with the die setup device 63 provided adjacent to the die block 6 or moves from the die exchange position K to the die block mounting position S of the punch press 1.
Or to move in order to insert one.

The mold block 6 is located at the mold exchange position K.
A die lifter (not shown) that raises 1 from the upper surface of the chain conveyor 65 is provided.

In FIG. 5, a mold setup device 63 for carrying in the mold block 61 to the mold exchanging position K or ejecting the mold block 61 at the mold exchanging position K is orthogonal to the chain conveyor 65, for example. The table 47A
A guide rail 67, which is a traveling path, is laid in parallel with the guide rail 67. A self-propelled transport device 69 is mounted on the guide rail 67.
Are movable in the X-axis direction. The transport device 69 is provided with a chuck device (not shown) for holding the mold block 61. The mold block 61 is gripped by this chuck device, pulled into the transport device 69 and placed.

A block exchanging device is provided at a position adjacent to the guide rail 67. With this block exchanging device, the mold block 61 on the transporting device 69 is connected to another mold block 61 set in advance. Be exchanged. Since this block exchange device may be a known one, a detailed description is omitted.

Next, the changer device 59 (mold changing device), which is a main part of the embodiment of the present invention, will be described in more detail.

Referring to FIG. 6, a chain conveyor 65 is provided on the changer frame 71 on the lower frame 5 so as to extend in the Y-axis direction. This chain conveyor 65
Has two sprockets 73 in the width direction on the front end side and the rear end side of the changer base 71, respectively, and the endless annular chain 7 is attached to each of the front and rear sprockets 73.
The sprocket shaft on the rear end side is provided so that the rotation of a drive motor (not shown) can be rotated forward and backward through drive transmission means such as a sprocket and a chain.

A changer body 77 is locked to a chain 75 located above the chain conveyor 65 via a lock (not shown). Accordingly, the forward and reverse rotation of the chain conveyor 65 causes the changer body 77 to move the mold block 61 locked by the changer lever 79 to the mold block mounting position S and the mold changing position K in the punch press 1. Changer stand 71
It is reciprocable on the top.

Referring to FIGS. 1 and 2, a changer plate 81 is provided inside the changer main body 77 so as to be movable substantially horizontally in the X-axis and Y-axis directions. In the present embodiment, a large number of free bears 83 are provided on the bottom surface of the changer plate 81, and the changer plate 81 is placed on the bottom surface of the changer body 77 via the free bears 83.

At the front end (left side in FIG. 1) of the changer plate 81, a locking portion 87 which can be engaged with and disengaged from a locking portion 85 (more specifically described later) provided on the die block 25 is provided at the front end. The provided changer lever 79 protrudes. A flange 89 is provided on the outer periphery of the tip of the changer lever 79, and the flange 89 is engaged with the engaging portion 85 of the die block.
Becomes

On the other hand, as shown in FIGS. 1, 3 and 4, a flange portion 89 (locking portion) of the changer lever 79 is fitted into the rear end of the die block 25 from the horizontal direction and engaged therewith. A locking portion 85 comprising a possible T-shaped groove 91 with a T-shaped cross section is provided.

In FIG. 1, two changer levers 7 are provided.
Although the number 9 is provided, one or three or more pieces may be provided, and the shape of the locking portion 87 may be, for example, a protrusion locking portion 87 projecting up and down from the tip of the changer lever 79. Or other shapes, the number of the changer levers 79 and the shape of the locking portion 87 are not particularly limited. The number of locking portions 85 of the die block 25 is a number or shape corresponding to the number of changer levers 79 or the shape of the locking portion 87.

On the upper surface of the changer plate 81, 2
One cam roller 93 is rotatably supported in the horizontal direction as a guide member.

The above-mentioned 2
A cam plate provided with a cam groove 95 for moving the two cam rollers 93 from diagonally forward (obliquely upward in the left direction in FIG. 1) toward the mold block mounting position S in a substantially horizontal direction to lateral direction (upward in FIG. 1). 97 are provided.

Since the guide member may be a simple projection member, it is not particularly limited to the cam roller 93. Further, the number of guide members may be one or three, and may be provided at a position other than the upper surface of the changer plate 81. Therefore, the number of guide members and the position provided on the changer plate 81 are not limited.

For example, the cam roller 93 is provided on the lower surface of the changer plate 81 at a position not interfering with the free bear 83 so as to protrude below the free bear 83, and a cam groove 95 for guiding the cam roller 93 is formed on the bottom surface of the changer body 77. It can also be provided. Alternatively, a flange may be provided at the rear end of the changer plate 81, a cam roller 93 may be provided above or below the flange, and a cam groove 95 for guiding the cam roller 93 may be provided on the upper surface or the bottom surface of the changer body 77.

A cam roller 93 is provided on the lower side of the changer body 77 in FIG.
A changer plate driving means such as an air cylinder 99 for driving the changer plate 81 in the horizontal direction so as to reciprocate along the cam groove 95 is provided. More specifically, a support frame is provided on a side portion of the changer body 77, and a rear end of the air cylinder 99 is rotatably supported on the support frame in a horizontal direction. The front end of the cylinder rod 101 on the front end side of the air cylinder 99 is supported by the side of the changer plate 81.

With the above configuration, the mold block 61 has been moved to the mold block mounting position S in advance, and the changer body 77 advances to the mold block mounting position S by rotation of the chain conveyor 65, and the mold block is mounted. It reaches the position S.

By operating the air cylinder 99 and moving the cylinder rod 101 forward, the changer plate 81
Slides on the bottom surface of the changer main body 77 in a substantially horizontal direction via the free bear 83, and the cam rollers 93 of the changer plate 81 move as shown in FIG.
7 is guided from the diagonally forward direction (the upper left direction in FIG. 1) toward the mold block mounting position side along the cam groove 95 of FIG.

Along with this, the changer lever 79 at the front end of the changer plate 81 also moves laterally obliquely from the front as shown in FIG. Flange portion 89 (locking portion) is fitted into and engaged with the T-shaped groove portion 91 of the locking portion 85 of the die block.

When the chain conveyor 65 is rotated by the rotation of the drive motor and the changer body 77 is retracted to the mold changing position K, the mold block 61 locked by the changer lever 79 is pulled by the changer body 77 and the chain is moved. It is transported on the conveyor 65 to a predetermined mold exchange position K.

At this time, the flange 89 of the changer lever 79 is engaged with the locking portion 8 of the T-shaped groove 91 of the die block 25.
5 is engaged in the horizontal direction, so that the locking state is secure. Therefore, even if the changer body 77 vibrates vertically when moving on the chain conveyor 65, the locking portion 87 of the changer lever 79 is Does not come off from the locking portion 85 of the die block 25.

After the mold block 61 reaches the mold changing position K, the air cylinder 99 is operated to move the cylinder rod 101 backward, so that the changer plate 8 is moved.
As shown in FIG. 1, one cam roller 93 is guided along the cam groove 95 of the cam plate 97 from a lateral direction (downward in FIG. 1) to an obliquely rearward (obliquely rightward downward in FIG. 1). The changer lever 79 at the front end of the changer plate 81 also moves obliquely rearward from the lateral direction as shown in FIG. 1 through a movement locus similar to that of the cam roller 93, so that the flange portion 89 of the changer lever 79. The (locking portion) is separated from the T-shaped groove 91 of the locking portion 85 of the die block.

Thereafter, the mold block 61 at a predetermined mold exchange position K is raised by a die lifter (not shown),
It is drawn into the conveying device 69 of the mold setup device 63, and the mold replacement and the alignment of the punch P and the die D are performed by the mold setup device 63.

The other mold block 61 replaced by the mold setup device 63 is placed on the above-described mold replacement position K by the transport device 69.

Again, the air cylinder 99 of the changer device
As a result, the flange portion 89 (locking portion) of the changer lever 79 is moved obliquely from the front side to the lateral direction as described above, and the T-shaped groove portion 91 of the locking portion 85 of the die block is moved. And engage.

When the chain conveyor 65 rotates again and the changer body 77 moves forward to the mold block mounting position S, the die block is pushed toward the front mold block mounting position S by the front end of the changer lever 79.

When the mold block 61 has reached the mold block mounting position S, the air cylinder 99 is operated and the cylinder rod 101 is retracted as described above, so that the flange portion 89 (locking portion) of the changer lever 79 is moved. The die block 61 is detached from the T-shaped groove 91 of the locking portion 85 of the die block, and the die block 61 is mounted on the punch press 1.

The present invention is not limited to the above-described embodiment of the present invention, but can be embodied in other forms by making appropriate changes.

[0069]

As can be understood from the above embodiments of the present invention, according to the first aspect of the present invention, the changer plate driving means operates to move the changer plate in the changer body in a substantially horizontal direction. At this time, the guide member provided on the changer plate moves along the cam groove of the cam plate from the oblique front toward the mold block mounting position sideways in the lateral direction. Along with this, the changer lever at the front end of the changer plate also moves laterally from diagonally forward through the same trajectory as the guide member, so that the locking portion of the changer lever is substantially horizontally moved to the locking portion of the die block. Can engage.

At this time, since the locking portion of the changer lever is engaged with the locking portion of the die block from the horizontal direction, even if the changer body vibrates vertically when moving on the chain conveyor, The locking portion does not come off from the locking portion of the die block, and the locked state can be ensured.

When the changer body advances to the mold block mounting position side, the die block is pushed forward at the front end of the changer lever, so that the conventional pusher shaft is unnecessary.

According to the second aspect of the present invention, the projecting locking portion of the changer lever is fitted and engaged from the horizontal direction into the T-shaped groove of the locking portion of the die block. The state can be assured.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention and is a plan view of a mold changing device (changer device).

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

FIG. 3 is a side view taken along line III-III in FIG.

4 is a cross-sectional view of a main part taken along line IV-IV in FIG.

FIG. 5 shows an embodiment of the present invention, and is a plan layout view of a punch press and a mold changing device (changer device).

FIG. 6 is an enlarged front view of the punch press in FIG.

FIG. 7 is an explanatory diagram showing connection between a punch block and a die block.

FIG. 8 is a plan layout view of a conventional punch press and a mold changing apparatus.

FIG. 9 is an explanatory view of a conventional changer lever.

FIG. 10 is an explanatory diagram of a conventional changer lever.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Punch press 3 Frame 23 Punch block 25 Die block 59 Changer device (die changing device) 61 Die block 65 Chain conveyor 77 Changer main body 79 Changer lever 81 Changer plate 85 Lock portion (of die block 25) 87 Lock portion (Of changer lever 79) 89 Flange part (locking part of changer lever 79) 91 T-shaped groove part (locking part of die block 25) 93 Cam roller (guide member) 95 Cam groove 97 Cam plate 99 Air cylinder (Changer plate drive means)

Claims (2)

[Claims] 1. A die block mounting position in a punch press for exchanging a die block composed of a punch block having a plurality of punches and a die block having a plurality of dies for a punch press. A mold changing device for carrying in and out between the mold changing position, and a changer plate disposed substantially horizontally in a changer body provided reciprocally between the mold block mounting position and the mold changing position. The changer plate is provided movably in the direction, and a changer lever is provided at the front end of the changer plate so as to be engaged with and disengaged from a locking portion provided on the die block, and a guide member is provided on the changer plate. The changer body is provided with a cam plate provided with a cam groove for guiding in a lateral direction from diagonally forward toward the mold block mounting position side with Mold changing device in the punch press, characterized by comprising providing a changer plate driving means for driving the changer plate so as to reciprocate said cam roller along the cam groove of the cam plate in the horizontal direction in the changer body. 2. The locking portion of the changer lever comprises a projection provided on the outer periphery of the tip of the changer lever, and the locking portion of the die block is capable of horizontally engaging and disengaging the projection of the changer lever. 2. A die changing device in a punch press according to claim 1, wherein said die changing device comprises a T-shaped groove.