JP6446255B2 - Punch die mounting method and punch die changer - Google Patents

Description

  The present invention relates to a punch mold mounting method and a punch mold exchanging apparatus, and in particular, a punch mold mounting method when a punch mold is moved and mounted from a mold storage portion such as a buffer turret to a turret of a turret punch press. And a punch mold exchanging apparatus for performing the operation.

A general structure of a punch die used in a turret punch press is described in Patent Document 1.
As shown in Patent Document 1, a punch die includes a cylindrical punch guide supported by a punch holder of a turret when mounted on a turret, and a punch head supported so as to be movable up and down with respect to the punch guide in a use posture. And a stripper spring that constantly urges the punch head upward with respect to the punch guide.

Also known is a buffer turret (storage turret) for storing such a punch die during processing standby. An example of a mold exchanging apparatus for moving and mounting a punch mold from a buffer turret to a turret of a turret punch press is described in Patent Document 2.
As shown in Patent Document 2, the mold exchanging device includes a punch gripper (clamper) that holds the punch head of the punch mold, and a punch gripper on the tip side, and rotates and moves up and down with respect to an upright shaft. And an arm. Further, the die changer detects a punch confirmation sensor that detects whether or not the punch die is held based on the contact pressure of the upper surface of the punch head held by the punch gripper, and detects bending of the punch gripper arm caused by overload. A break detection sensor.

  The mold exchanging device described in Patent Document 2 tries to continue the descent when the punch mold is inserted into the turret punch holder from above and cannot be inserted due to problems such as catching. The punch gripper, which cannot be lowered due to excessive insertion resistance, is bent with respect to the arm to be bent, and the bending is detected by an error detection sensor.

JP 2012-250290 A JP 2011-078997 A1

By the way, in the prior art as described in Patent Document 2, there is a case where an error cannot be detected when the punch die is caught in the final stage of the insertion stroke.
Specifically, if the punch die is caught during insertion, the punch guide cannot be lowered thereafter, but the arm and punch gripper are lowered together with the punch head while compressing the stripper spring.
Therefore, if the arm lowering target position corresponding to the punch mold mounting completion position is within the compression stroke range of the stripper spring, the punch mold has been inserted normally and the arm has reached the lowering target position. It cannot be determined whether the arm has reached the lowering target position due to the compression of the stripper spring when the mold is not inserted to the predetermined position.
For this reason, there is room for improvement in order to more reliably detect a mounting failure of the punch mold to the turret.

  Therefore, the problem to be solved by the present invention is to provide a punch mold mounting method and a punch mold exchanging apparatus that can more reliably detect a defective mounting of the punch mold to the turret.

In order to solve the above problems, the present invention has the following procedures and configurations.
1) A punch die having a punch guide and a punch head which is movable up and down with respect to the punch guide and is biased upward by a biasing member is mounted on a punch holder of a turret by a punch die changer. A punch mold mounting method,
The punch mold exchanging device includes a clamper that holds the punch head, an arm that moves up and down with the clamper, and a punch detection sensor that detects whether the punch head is in contact with the arm. ,
An arm lowering step of lowering an arm so as to hold the punch head with the clamper and insert the punch die into the punch holder from above;
An arm reversal raising step for releasing the clamper and raising the arm to a check height position after lowering the arm to a reference insertion height position;
Punch detection step of detecting presence or absence of contact of the punch head with the punch head by the punch detection sensor in a state where the arm is at the check height position or in a state where the arm is being raised to the check height position When,
Is a punch mold mounting method characterized by comprising:
2) The height position for checking is set above a reference height position that is a height position of the punch head in a state where the punch mold is normally mounted on the punch holder. 1) The punch mold mounting method according to 1).
3) the use checking the height position and the reference height position, for each of the punch tool to be mounted, you characterized in that information of the punch die is acquired from the mold information database stored 2 ).
4) A punch mold exchanging apparatus for mounting a punch mold having a punch guide and a punch head which is movable up and down with respect to the punch guide and biased upward by a biasing member to a punch holder of a turret Because
A clamper for gripping the punch head;
An arm that moves up and down with the clamper;
A punch detection sensor that detects whether the punch head held by the clamper is in contact with the arm;
A control unit for controlling the operation of the punch die changer;
With
The controller is
The arm is lowered so that the punch die holding the punch head by the clamper is inserted into the punch holder from above, and the clamper is gripped after the arm is lowered to the reference insertion height position. Release and raise to the check height position, to the arm of the punch head output from the punch detection sensor in the check height position or in the state of being raised to the check height position A punch mold exchanging apparatus comprising: a success / failure determination unit that determines whether or not the punch mold is mounted based on the contact presence / absence information.
5) The control unit raises the check height position above a reference height position which is a height position of the punch head in a state where the punch mold is normally mounted on the punch holder. The punch die changing apparatus according to 4), characterized in that it is set.
6) the the checking height and the reference height position, for each of the punch tool to be mounted, you characterized in that information of the punch die is acquired from the mold information database stored 5 ).

  According to the present invention, there is an effect that it is possible to more reliably detect a mounting failure of the punch mold to the turret.

FIG. 1 is a schematic plan view of a turret punch press system T including a changer 1 which is an example of a punch mold exchanging apparatus according to an embodiment of the present invention. FIG. 2 is a schematic side view for explaining the changer 1. FIG. 3 is a block diagram of the changer 1. FIG. 4 is a cross-sectional view for explaining a normal mounting state of the punch die P. As shown in FIG. FIG. 5 is a flowchart for explaining the mounting operation of the punch die P by the changer 1. FIG. 6 is a cross-sectional view corresponding to FIG. 4 for explaining the insertion check operation in the mounting operation of the punch die P.

  As an example of a punch mold exchanging apparatus according to an embodiment of the present invention, a changer 1 which is a punch mold exchanging apparatus will be described together with its operation with reference to FIGS.

FIG. 1 is a schematic plan view illustrating a schematic configuration of a turret punch press system T (hereinafter referred to as a press system T) including a changer 1.
The press system T includes a turret punch press main body 11, a rack 12 for storing and storing a mold, a buffer turret 13 for temporarily storing the mold during processing standby, and a mold between the rack 12 and the buffer turret 13. And a traverser 14 for performing mold exchange. Furthermore, the press system T includes a changer 1 for exchanging dies between the buffer turret 13 and the turret 15 of the turret punch press main body 11, and an NC device 16 which is a control unit for controlling the entire operation of the press system T. And.

The buffer turret 13 is provided with a plurality of buffer punch holders 13a as mounting holes for mounting a punch die P (see FIG. 2).
The turret 15 is provided with a plurality of punch holders 15a as mounting holes for mounting the punch dies P.
The turret 15 has an upper and lower two-stage structure of an upper turret for mounting a punch mold and a lower turret for mounting a die mold. In the following description, only the upper turret is illustrated and described as the turret 15.

The NC device 16 has a storage unit MR. The storage unit MR stores a mold information database DB that stores information on the operation program PG of the press system T and the punch mold P mounted on the turret 15 (see FIG. 3).
The information on the mold stored in the mold information database DB includes, for example, a mold number, a mold type, dimensions (shape dimensions) of each part, and usage history.

The turret punch press body 11 includes a table 11a that extends in an XY plane and supports a workpiece W, and a central frame that extends across the table 11a in an arch shape in the Y-axis direction at the center in the X-axis direction. 11b.
A turret 15 is provided on the rack 12 side of the central frame 11b.
The turret punch press main body 11 includes a carriage base 11c that can move in the Y direction on the table 11a, and a carriage 11d that is supported so as to be movable in the X direction with respect to the carriage base 11c.
The carriage 11d has a plurality of work clampers 11e capable of gripping a plate-like work W.

With this configuration, the workpiece W gripped by the workpiece clamper 11e can be moved on the table 11a along an arbitrary locus and positioned at an arbitrary position.
The operations of the carriage base 11c, the carriage 11d, and the work clamper 11e are executed by a driving unit provided corresponding to each operation. Here, each drive unit is collectively referred to as a main body drive unit MH (see FIG. 3). The operation of the main body drive unit MH is controlled by the NC device 16.
The workpiece W is moved to a predetermined processing position where a die selected for processing is positioned from among a plurality of dies on the turret 15 under the control of the NC device 16, and a punch mechanism (not shown) Punching is performed in cooperation with the positioned upper turret punch die and lower turret die die.

FIG. 2 is a schematic side view for explaining the changer 1 and the upper turret 15.
FIG. 2 shows a state in which the changer 1 holds the punch die P and is positioned above one punch holder 15 a of the turret 15.
FIG. 2 shows an arbitrary punch holder among the plurality of punch holders 15a.

The punch holder 15a is formed as a stepped hole having a small diameter on the lower side, and a lifter spring 15c, which is a coil spring, is attached to a portion on the large diameter side.
The lifter spring 15c is pressed and compressed downward in FIG. 2 by the flange 21b of the punch die P during the punching operation, and the punch 21a is urged upward by the repulsive force after the punching is finished. Return to normal position.

The punch die P includes a cylindrical punch guide 21a that is supported when mounted on the punch holder 15a, a flange 21b that is supported by contact with the lifter spring 15c, a disk-shaped punch head 21c, and a punch head 21c. Punch body 21c2 extending downward from FIG. The punch head 21c is inserted into the punch guide 21a side integrally with the punch body 21c2 and supported so as to be movable up and down.
Further, the punch die P has a coiled stripper spring 21d which is a biasing member that biases the punch head 21c in a direction that always leaves the punch guide 21a (upward in the use posture).

  The changer 1 includes, for example, a support 31 standing on a frame on the turret punch press main body 11 side, and an arm holder attached to the support 31 so as to be rotatable (see arrow Da) and vertically moved (see arrow Db). 32 and an arm 33 extending radially outward from the arm holder 32. Further, the arm 33 has a clamp portion 34 at the tip.

The arm holder 32 moves up and down with respect to the column 31 by the operation of the lifting drive unit Ma. As shown in FIG. 3 (a block diagram of the press system T), information about the operation of the lifting drive unit Ma is sent to the NC device 16 by the encoder Ma1 as lifting operation information JMa.
The NC device 16 controls the operation of the elevating drive unit Ma, and grasps the height position of the arm holder 32, that is, the arm 33, based on the elevating operation information JMa.

The arm holder 32 is rotated with respect to the column 31 by the operation of a drive unit (not shown) in the direction of the arrow Da around the axis CL1 of the column 31 by the operation of the rotation drive unit Mb. As shown in FIG. 3, information about the operation of the rotation drive unit Mb is sent to the NC device 16 as rotation operation information JMb by the encoder Mb1.
The NC device 16 controls the operation of the rotation drive unit Mb and grasps the rotation position of the arm 33 based on the rotation operation information JMb.

The arm 33 moves up and down as the arm holder 32 moves up and down. Further, as the arm holder 32 rotates, it turns around the axis CL1.
The clamp unit 34 includes a pair of clampers 34a that sandwich and hold the punch head 21c of the punch die P in the diameter direction, and a clamper drive unit 34b that separates the pair of clampers 34a from each other (see arrow Dc). ing.
The operation of the clamper drive unit 34 b is controlled by the NC device 16.

The clamp portion 34 is provided with a punch detection sensor 35 that detects whether or not the punch head 21c of the punch die P held by the clamper 34a is in contact.
The type of the punch detection sensor 35 is not limited, and for example, a pressure sensor is used.
When the punch detection sensor 35 detects that the punch head 21c is in contact with the arm 33, the punch detection sensor 35 sends the punch detection information J1 to the NC device 16 (see FIG. 3).

The arm 33 is allowed to rotate upward with respect to the arm holder 32 when an excessive upward force of a predetermined value or more is applied to the clamp portion 34 (the arrow in FIG. 2). Dd). The arm holder 32 is provided with an insertion load detection sensor 36 for detecting the occurrence of this upward rotation.
The upward rotation of the arm 33 occurs when, for example, the insertion load of the punch die P into the punch holder 15a becomes abnormally high and exceeds a predetermined value.
When detecting the upward rotation of the arm 33, the insertion load detection sensor 36 sends the insertion load detection information J2 to the NC device 16 (see FIG. 3).

  The changer 1 is configured so that the punch die P is loaded and unloaded between the buffer punch holder 13a of the buffer turret 13 and the punch holder 15a of the turret 15 by turning the arm 33 and holding the pair of clampers 34a. It can be moved.

The NC device 16 includes a success / failure determination unit 16a that determines whether or not the punch die P is normally mounted on the punch holder 15a (see FIG. 3).
Then, the NC device 16 performs the mounting operation of the punch die P on the punch holder 15a in three heights, a reference height position HB, a reference insertion height position HR, and a check height position HC, which will be described next. Run based on location.

FIG. 4 shows a state in which the punch die P is normally mounted on the punch holder 15a (hereinafter referred to as a normal mounting state). In this normal mounting state, the punch guide 21a is supported by the lifter spring 15c and the height position is regulated.
Here, in the dimension of the punch die P, the total height in the natural state where the punch head 21c is at the uppermost position is the height Hp, and the height from the upper surface 15b of the turret 15 to the position of the upper surface 21c3 of the punch head 21c in the natural state. Is the height Hp1. The height position of the upper surface 21c3 in the normal mounting state is set as a reference height position HB.
The NC device 16 acquires the information of the reference height position HB for each punch die P to be mounted from information on the overall length (height) of the punch die stored in the die information database DB.

The reference insertion height position HR is the lowest lowered position of the lower surface 33a of the arm 33 in the operation of inserting the punch die P into the punch holder 15a, and is the same as the reference height position HB in this embodiment.
In the operation of inserting the punch die P into the punch holder 15a performed by the changer 1, one of the conditions for successful mounting is that the lower surface 33a (see FIG. 2) of the arm 33 can be lowered to the reference insertion height position HR. ing.
The lower surface 33a of the arm 33 is a surface with which the upper surface 21c3 of the punch head 21c abuts when the punch die P is inserted.

Where the reference point of the reference insertion height position HR is set is not limited, for example, the upper surface 15b of the turret 15 is used.
When the upper surface 15b is used as a reference point, in FIG. 4, the reference insertion height position HR is a position where the distance Hhr = Hp1 is upward from the upper surface 15b.
The NC device 16 sets the distance Hhr to the height Hp1 in the mold information database DB. This setting is performed for each punch die P to be mounted.

The check height position HC is determined by lowering the arm 33 and lowering the lower surface 33a thereof to the reference insertion height position HR in the procedure for inserting the punch die P, which will be described later. Is the height position to reach.
Specifically, as shown in FIG. 4, the check height position HC is a position spaced apart by a distance Hb from the upper surface 21c3 of the punch head 21c in the punch mold P in the normal mounting state.
That is, the check height position HC is a position where the distance Hhc = (Hp1 + Hb) is upward from the upper surface 15b of the turret 15.
The distance Hb is set within the range of the compression stroke STa of the stripper spring 21d, and is stored in advance in the mold information database DB in association with the item of the shape dimension of the mold.
The NC device 16 acquires the distance Hhc with reference to the shape dimension in the information regarding the mold stored in the mold information database DB based on the unique number of the punch mold P to be mounted. This acquisition is performed for each punch die P to be mounted. Alternatively, the distance Hhc can be determined in advance, set as a parameter as one common value, stored in the storage unit MR of the NC device 16, and the value can be used for a plurality of dies.

  Next, the movement mounting operation of the punch die P by the changer 1 from the buffer punch holder 13a to the punch holder 15a will be described with reference to FIGS.

It is assumed that the arm 33 is initially in a standby position (initial position). The standby position is an intermediate rotation position between the buffer turret 13 and the turret 15.
The NC device 16 operates the rotation drive unit Mb to rotate the arm 33 from the standby position toward the buffer turret 13 (Step 1).

The NC device 16 positions the clamp portion 34 directly above the desired punch die P mounted on the buffer turret 13 during this turning. Then, the lift drive unit Ma is operated to lower the arm 33, the clamper drive unit 34b is operated, and the punch head 21c of the punch die P is gripped by the pair of clampers 34a.
After this gripping, the arm 33 is raised by the lift drive unit Ma and the punch die P is removed from the buffer turret 13 (Step 2).

  The NC device 16 operates the rotation drive unit Mb to rotate the arm 33 to the turret 15 side (Step 3). By this turning, the punch die P is positioned immediately above the punch holder 15a to be mounted (Step 4). This positioned state corresponds to FIG.

  The NC device 16 operates the lifting drive unit Ma to lower the arm 33 and insert the punch die P into the punch holder 15a (Step 5).

In the NC device 16, has the lower surface 33a of the descending arm 33 reached the reference insertion height position HR (the same as the reference height position HB in this example) that is the position where the punch die P is in a predetermined mounting state? Whether or not is determined based on the lifting operation information JMa (Step 6).
When the determination of (Step 6) is no (No), it is determined based on the insertion load detection information J2 whether or not the insertion is overloaded (Step 7).

If the determination of (Step 7) is no (No), the process returns to (Step 6).
When the determination of (Step 7) is Yes (Yes), the NC device 16 determines that the insertion of the punch die P into the punch holder 15a has failed, and executes an alarm process (Step 8).
The alarm process is, for example, a process of outputting a sound for notifying the operation stop of the press system T and the occurrence of an error.

  When the determination in (Step 6) is “Yes” (Yes), the NC device 16 determines whether or not the punch head 21c is in contact with the arm 33 based on the punch detection information J1 (Step 9).

When the determination of (Step 9) is negative (No), the NC device 16 determines that the mounting of the punch die P on the punch holder 15a has failed, and executes an alarm process (Step 8). As a case where this determination is negative, it is assumed that there is a malfunction such as breakage of the punch die P, erroneous mounting, or failure of the punch detection sensor 35.
When the determination of (Step 9) is Yes (Yes), the NC device 16 refers to the mold information database DB or the parameter setting value for the distance Hhc from the upper surface 15b of the turret 15 at the check height position HC. Obtain (Step 10). This acquisition is performed for each punch die P to be mounted.

  The NC device 16 operates the clamper driving unit 34b to release the gripping of the punch head 21c by the clamper 34a (Step 11), and then operates the lifting / lowering driving unit Ma so that the lower surface 33a of the arm 33 has a check height. The position is raised to HC (Step 12).

  When the lower surface 33a reaches the check height position HC, the NC device 16 determines whether or not the punch head 21c is in contact with the arm 33 based on the punch detection information J1 (Step 13).

When the determination of (Step 13) is Yes (Yes), the process proceeds to (Step 8), and the NC device 16 has failed to be inserted because the insertion of the punch die P into the punch holder 15a is not sufficiently performed in the success / failure determination unit 16a. Is determined and the alarm process is executed (Step 8).
When the determination of (Step 13) is NO (No), the NC device 16 determines in the success / failure determination unit 16a that the punch die P is normally mounted on the punch holder 15a (Step 14), and further raises the arm 33. Then, it turns to move to the standby position (initial position) (Step 15), and the operation is finished.

According to this mounting procedure, the NC device 16 causes the arm 33 to be checked for insertion in (Step 10) to (Step 13).
In the insertion check operation, after executing (Step 5), it is determined that the lower surface 33a of the arm 33 has reached a predetermined reference insertion height position HR (Step 6: Yes). It is moved (raised) from the reference insertion height position HR to the check height position HC (see FIG. 7: arrow Df).
Further, the operation is to determine whether or not the punch head 21c is in contact with the lower surface 33a of the arm 33 based on the punch detection information J1 at the check height position HC (Step 13).

For example, the case where the punch die P is caught for some reason at the final insertion stage of the punch holder 15a and cannot be inserted will be described with reference to FIG.
The distance from the lower surface of the flange 21b to the upper surface 15b of the turret 15 at the position where the punch die P cannot be inserted is defined as a distance He.
Here, it is assumed that the distance He is larger than the distance Hb and smaller than the compression stroke STa of the coil spring Pd. In this case, when the arm 33 descends in (Step 6), the lower surface 33a of the arm 33 can reach the reference insertion height position HR while compressing the stripper spring 21d, and the determination becomes yes (Yes).
Naturally, since the upper surface 21c3 of the punch head 21c comes into contact with the lower surface 33a of the arm 33 by the repulsive force of the stripper spring 21d, (Step 9) also becomes Yes (Yes).
That is, whether the mounting of the punch die P is successful or incomplete and unsuccessful is not determined by the operation so far, but is determined by the insertion check operations of (Step 10) to (Step 13).

In this insertion check operation, the NC device 16 first raises the arm 33 so that the lower surface 33a reaches the check height position HC (see arrow Df).
Here, if the punch mold P is normally mounted as shown in FIG. 4, the punch head 21c reaches the upper end position of the up / down stroke and rises in the middle of the rise to the check height position HC. Therefore, the arm 33 is separated from the lower surface 33a of the arm 33.
On the other hand, when the punch die P is not fully inserted as shown in FIG. 6 and the mounting has failed, the distance He is larger than the distance Hb, so that the lower surface 33a of the arm 33 is at the check height position HC. However, the punch head 21c still does not reach the upper end position of the up / down stroke and is in contact with the lower surface 33a of the arm 33. Since this contact is detected by the right determination in (Step 13), it can be determined that the attachment has failed.

  As described above, as the distance Hb is smaller, the mounting failure at the smaller distance He can be detected by the determination of (Step 13). Therefore, it is preferable to set the distance Hb as small as possible.

  As described above, according to the above-described mounting method using the changer 1, it is possible to more reliably detect the mounting failure of the punch mold to the turret.

  The embodiments of the present invention are not limited to the above-described configuration, and modifications may be made without departing from the spirit of the present invention.

In the embodiment, the check height position HC is acquired as a position corresponding to each corresponding punch die P, but is not limited to this, and may be a predetermined position. As the position in this case, for example, a check height position HC that is the highest position among all the punch dies P attached to the turret 15 and used for processing is adopted.
The information on the employed check height position HC is input and set in advance by the operator, or is extracted and set by referring to all punch die information in the die information database DB before the NC device 16 starts operation.
This eliminates the need for the NC device 16 to refer to and obtain the check height position HC for each punch die P to be mounted, so that the CPU of the NC device 16 can be used even if the processing capability is not particularly high. It becomes possible.
Similarly, the values of the reference height position HB, height Hp1, and distance Hb are set in advance as parameters as one common value group and stored in the storage unit MR of the NC device 16, and the value group. Can be used for a plurality of molds.

The reference insertion height position HR may be a position where the punch head 21c is pushed downward by a predetermined distance with respect to the reference height position HB in the normal mounting state shown in FIG. The predetermined distance is a distance smaller than the compression stroke STa of the stripper spring 21d.
In this case, after the clamp is released in (Step 11), the arm 33 is raised, and the punch head 21c is separated from the lower surface 33a of the arm 33 in a state where the arm 33 is being lifted (non-contact height). May be detected, and the detected height position may be compared with the reference height position HB of the corresponding punch die P to determine whether or not both positions match.
The NC device 16 determines the success or failure of the mounting of the punch die P in the success / failure determination unit 16a based on the comparison result. Specifically, when the detected non-contact height position does not match the reference height position HB, it is determined that the mounting has failed.
In this operation, the ascending distance of the arm 33 in the insertion check operation is shortened, so that the operating efficiency is improved. Further, the insertion failure can be detected early, and the operating efficiency is improved in this respect as well.

You may make it perform the retry operation | movement once or several times before the alarm process of (Step8).
The retry operation is an operation in which the arm 33 is raised with the punch head 21c clamped (or re-clamped after releasing the clamp) to return to (Step 4), and (Step 4) and subsequent steps are executed again.
By executing the retry operation, if an insertion failure occurs accidentally, it succeeds in subsequent trials, so that the operation of the press system T is not stopped and the operation efficiency is improved.

DESCRIPTION OF SYMBOLS 1 Changer (punch die change apparatus), 11 Turret punch press main body 11a Table 11b Center frame, 11c Carriage base 11d Carriage, 11e Work clamper, 12 Rack 13 Buffer turret 13a Buffer punch holder 14 Traverser, 15 turret (upper turret)
15a punch holder, 15b upper surface, 15c lifter spring 16 NC device, 16a success / failure determination unit 21a punch guide, 21b flange 21c punch head, 21c2 punch body, 21c3 upper surface 21d stripper spring 31 strut, 32 arm holder, 33 arm, 33a lower surface 34 Clamp part 34a Clamper 34b Clamper drive part 35 Punch detection sensor 36 Insertion load detection sensor CL1 Axis line DB Mold information database Ha, Hb, Hhr, He Distance, Hp, Hp1 Height HB Reference height position, HC check height Position, HR Reference insertion height position JMa Elevation operation information, JMb Rotation operation information J1 Punch detection information, J2 Insertion load detection information Ma Elevation drive unit, Ma1 encoder Mb Rotation drive unit, Mb1 encoder M H body drive unit, MR storage unit P punch mold, PG operation program, STa compression stroke T turret punch press system (press system), W workpiece

Claims (6)

Punch for mounting a punch die having a punch guide and a punch head that can be moved up and down with respect to the punch guide and biased upward by a biasing member to a punch holder of a turret by a punch die changer A mold mounting method,
The punch mold exchanging device includes a clamper that holds the punch head, an arm that moves up and down with the clamper, and a punch detection sensor that detects whether the punch head is in contact with the arm. ,
An arm lowering step of lowering an arm so as to hold the punch head with the clamper and insert the punch die into the punch holder from above;
An arm reversal raising step for releasing the clamper and raising the arm to a check height position after lowering the arm to a reference insertion height position;
Punch detection step of detecting presence or absence of contact of the punch head with the punch head by the punch detection sensor in a state where the arm is at the check height position or in a state where the arm is being raised to the check height position. When,
A method for mounting a punch die, comprising:   The check height position is set to be higher than a reference height position which is a height position of the punch head in a state where the punch mold is normally mounted on the punch holder. The punch mold mounting method according to claim 1. The check height position and the reference height position, for each of the punch tool to be mounted, you characterized in that information of the punch die is acquired from the mold information database stored 請 Motomeko The punching die mounting method according to 2. A punch mold exchanging apparatus for mounting a punch mold having a punch guide and a punch head which is movable up and down with respect to the punch guide and biased upward by a biasing member to a punch holder of a turret. And
A clamper for gripping the punch head;
An arm that moves up and down with the clamper;
A punch detection sensor that detects whether the punch head held by the clamper is in contact with the arm;
A control unit for controlling the operation of the punch die changer;
With
The controller is
The arm is lowered so that the punch die holding the punch head by the clamper is inserted into the punch holder from above, and the clamper is gripped after the arm is lowered to the reference insertion height position. Release and raise to the check height position, to the arm of the punch head output from the punch detection sensor in the check height position or in the state of being raised to the check height position A punch mold exchanging apparatus, comprising: a success / failure determination unit that determines whether or not the punch mold is mounted based on the contact presence / absence information.   The control unit sets the check height position above a reference height position that is a height position of the punch head in a state where the punch mold is normally mounted on the punch holder. The punch die changing apparatus according to claim 4, further comprising a storage unit that stores the set height position for checking. A mold information database storing information on the punch mold for the control unit to acquire the check height position and the reference height position for each punch mold to be mounted is provided. punch tool exchange device to that請 Motomeko 5 described as.

Images