JP3098174B2 - Override monitoring method and apparatus for punch press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a punch press such as a turret punch press for performing a punching process on a work clamped by a work clamp in cooperation with a punch and a die at a processing position. The present invention relates to a method and an apparatus for monitoring an override in a punch press for monitoring whether the work clamp has entered a position below a punch at a processing position.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, for example, a turret punch press 101 as a punch press is provided with rotatable upper and lower turrets 103 and 105, and upper and lower turrets 103 and 105 are provided. A plurality of punches 107 and dies 109 are arranged on the circumference of the turrets 103 and 105 at appropriate intervals.
And are attached. The position where one set of the punch 107 and the die 109 is mounted is the processing position K.

A carriage base 111 extending in the X-axis direction, which is the left-right direction, is moved in the Y-axis direction, which is the front-rear direction, by a driving device (not shown). The carriage base 111 is provided with a carriage 113 that can be moved in the X-axis direction by a driving device (not shown). The carriage 113 is provided with a plurality of work clamps 115 for clamping the work W.

[0004] With the above configuration, the carriage base 111
Is moved in the Y-axis direction, the carriage 113 is moved in the X-axis direction, and the desired position of the work W clamped by the work clamp 115 is positioned at the processing position K. Then, the cooperation between the punch 107 and the die 109 at the processing position K is performed. Work W by work
The punching process is performed.

When punching the vicinity of the work clamp 115, there is a possibility that the punch 107 punches the work clamp 115 or crushes the work clamp 115. In FIG. 5, a portion where the left work clamp 115 is contained within the diameter D of the punch 107, that is, a black portion is a portion that may be crushed.

For this reason, turret punch press 101
Is a work clamp 11 with an external limit switch, etc.
Knowing that 5 has entered the danger area, the system temporarily stops upon completion of positioning and asks the operator whether or not to perform punching.

[0007] The operator can set the X and Y values of the turret punch press 101 in a stopped state, the T number of the punch 107,
Based on the mounting position P of the work clamp 115, it is roughly determined whether or not the work clamp 115 has entered under the punch 107. If the work clamp 115 has not entered, a punch command is issued. This confirmation work is called override viewing.

[0008]

However, in the above-described conventional override monitoring, the presence or absence of the work clamp 115 under the punch 107 is determined by the rough calculation of the operator. It could be damaged.

To correct and confirm the accuracy, the operator looks at the work clamp 115 which has entered between the upper and lower turrets 103 and 105 from the front or side of the turret punch press 101 as shown in FIG. But it's just plain.

The reason is that, as shown in FIG. 7, the lower surface of the upper turret 103 and the lower surface of the punch 107 are "trickle".
This is because the punch 107 cannot be seen even though 5 is visible.

A work clamp 115 is provided below the punch 107.
Punch at least 10 to check whether or not
7 and the work clamp 115 need to be visible at the same time.

Although there is software (program) for determining whether or not the work clamp 115 is damaged by the control device based on the X, Y, T, and P values, the P value input to the control device includes:
If the P value actually attached is different, the work clamp 115 is naturally damaged.

Once the work clamp 115 is punched out, a great deal of labor and cost is required for repairing the shear plate (overload safety device) of the turret punch press 101 as well as repairing the breakage of the work clamp 115. Damage due to the suspension of 101 also occurs.

An object of the present invention is to simultaneously check a punch and a work clamp at a processing position and easily determine whether the punch is likely to be broken by punching or hitting the work clamp. And a method of monitoring override in a punch press.

[0015]

According to a first aspect of the present invention, there is provided an override monitoring method for a punch press according to the present invention, wherein a workpiece is clamped with a workpiece clamp and moved in the front-rear direction and the left-right direction. After the desired position is positioned at the processing position, the punch and the die at the processing position cooperate with each other to form a punch press that performs punching at the desired position on the work , and the work clamp is
When entering the work clamp danger area, the shooter provided on the front side of the machining position is opened, and the punch and the work clamp are imaged by the image pickup means provided on a part of the discharge chute, and the lower part of the punch is picked up. It is characterized in that it is monitored whether or not a work clamp has entered.

According to a second aspect of the present invention, there is provided an override monitoring apparatus in a punch press, wherein the work is clamped by a work clamp and moved in the front-rear direction and the left-right direction to set a desired position of the work to the processing position, and then at the processing position. A punch press for performing punching at a desired position of the work in cooperation with a punch and a die, and an openable / closable shooter is provided in front of the processing position. And an image pick-up means for monitoring whether or not a work clamp has been inserted under the punch in the discharge shooter.

According to a third aspect of the present invention, there is provided an override monitoring apparatus for a punch press according to the second aspect of the present invention, further comprising display means for displaying an image captured by the image capturing means. There is something.

According to a fourth aspect of the present invention, there is provided an override monitoring apparatus for a punch press according to the second aspect of the present invention, wherein an image picked up by the image pick-up means is taken and the work clamp is automatically positioned below the punch. And an image processing device for determining whether or not the image has entered.

[0019]

According to the override monitoring method and apparatus for a punch press of the present invention according to the first to fourth aspects of the present invention, a workpiece clamp that clamps a workpiece is moved in the front-rear direction and the left-right direction to position a desired position of the workpiece at a processing position. Next, a punching process is performed on the work by making the punch and the die at the processing position cooperate.

After the desired position of the work is positioned at the processing position, when the work clamp enters the work clamp danger area, the shooter provided at the front side of the processing position is opened prior to performing the punching processing. Image pickup means provided in a part of the discharge chute picks up an image of the vicinity of the lower part of the punch at the processing position.

The captured image is displayed on, for example, a display means, and the operator judges with the naked eye whether the clamp is under the punch and monitors it. Alternatively, the captured image is taken into the image processing apparatus, and it is automatically determined whether or not the work clamp is under the punch.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 2, for example, a turret punch press 1 as a punch press is provided with an upright portal-shaped frame 3, on which upper and lower turrets 5, 7 are rotatable. It is supported by Moreover, a plurality of punches 9 and dies 11 are mounted on the circumference of the upper and lower turrets 5 and 7 at appropriate intervals. The position where the punch 9 and the die 11 are at the K position is referred to as a processing position. A ram drive (not shown) for hitting the punch 9 is provided above the frame 3 at the processing position K.

A fixed center table 13 is provided in front of the machining position K, and side tables 15 which are movable in the front-rear direction (Y-axis direction) are provided on both sides of the center table 13. I have. On the front end (lower end in FIG. 2) of the side table 15, a carriage base 17 extending in the left-right direction (X-axis direction) is provided, and the carriage base 17 is integrated with the side table 15. To be moved in the Y-axis direction.

The carriage 1 can be moved in the X-axis direction by a driving device (not shown).
9, and the work 19 has a work W
Are provided.

By moving the carriage 19 in the X-axis direction and the carriage base 17 in the Y-axis direction, the work W clamped by the work clamp 21 is moved in the X-axis direction and the Y-axis direction. The desired position of the work W is positioned at the processing position K.

By cooperating the punch 9 and the die 11 at the processing position K with the desired position of the work W positioned at the processing position K, punching is performed at the desired position of the work W. .

An openable / closable shooter 23 is provided on the center table 13 in front of the processing position K. An ejection chute 25 is provided obliquely below the chute 23, as shown in FIG. For example, a CCD camera 27 as an image pickup unit is provided to the discharge shooter 25 obliquely upward through an anti-vibration device.
Is provided. On the left side of the turret punch press 1, for example, as shown in FIG. 2, an NC device 29 for controlling the entire machine is provided, and the NC device 29 is provided with, for example, a CRT 31 as display means. Have been.

With the above configuration, the punched material punched from the work W by the cooperation of the punch 9 and the die 11 is
By opening the shutter 3, the sheet is discharged to the outside through the discharge shooter 25.

The desired position of the workpiece W is positioned at the processing position K by moving the workpiece clamp 21 in the X-axis direction and the Y-axis direction. Before the punching is performed in cooperation with the punch 9 and the die 11, the dog provided at the lower part of the work clamp 21 comes into contact with a limit switch at a preset position to be turned on, and the work clamp 21 is turned on.
When the tip of the electrode comes into contact with a preset electrode plate and is turned ON, a work clamp dangerous area is formed. Then, shooter 23
1 is opened as shown in FIG. 1, the CCD camera 27 provided in the discharge shooter 25 is operated, so that an image near the lower portion of the punch 9 at the processing position K is, for example, an NC device 29. Is displayed on the CRT 31. That is, for example, as shown in FIG.
The lower surface of the punch 9 and the work clamp 21 are displayed on the screen of T31.
Are displayed, and the punch 9 and the work clamp 21 on this screen are viewed at the same time to see if they overlap (FIG. 3).
The worker can directly determine with the naked eye whether or not there is any. The angle of the CCD camera 27 is an angle at which the punch 9 and the work clamp 21 can be seen at the same time, and is an obliquely upward angle.

The operation of the override monitoring will be described with reference to the flowchart shown in FIG. 4. First, in step S1, the turret punch press 1 is operated normally. Step S
When the work clamp 21 enters the danger area in step 2, the override is temporarily stopped in step S3. Step S4
To open the shooter 23, and turn on the lighting device in step S5.
At the same time, the CCD camera 27 is turned on.

In step S6, the worker makes a judgment by looking at the image projected on the screen of the CRT 31. This step S
If it is determined in step 6 that the work clamp 21 is not under the punch 9, the turret punch press 1 is turned on in step S7, and the shooter 23 is closed in step S8.
In step S9, the CCD camera 27 is turned off, and the process returns to just before step S1. If it is determined in step S6 that the work clamp 21 is below the punch 9, the position of the work clamp 21 is corrected in step S10, and then the work clamp 21 is returned to the position before step S1.

Further, the image picked up by the CCD camera 27 may be taken into an image processing device so as to automatically determine the presence or absence of a hatched portion shown in FIG.

Therefore, the punch 9 is
By monitoring whether or not the work clamp 21 is inserted under the work clamp 21, it is possible to easily determine whether or not the punch 9 may break the work clamp 21 by punching or hitting the work clamp 21. The work clamp 21 can be prevented from being damaged.

It should be noted that the present invention is not limited to the preceding embodiment, but can be embodied in other modes by making appropriate changes.

[0036]

As will be understood from the above description of the embodiments, according to the first to fourth aspects of the present invention, after positioning a desired position of a work at a processing position, prior to performing punching processing, The chute provided at the front side of the processing position is opened. Image pickup means provided in a part of the discharge chute picks up an image of the vicinity of the lower part of the punch at the processing position.

The captured image is displayed on, for example, a display means, and the operator can visually check whether or not the work clamp is under the punch. Alternatively, a captured image can be taken into an image processing apparatus, and it can be automatically determined whether or not the work clamp is under the punch.

Therefore, whether or not the work clamp has been inserted under the punch mounted at the processing position can be easily monitored by the image pickup means, and the work clamp can be prevented from being damaged.

[Brief description of the drawings]

1 is an enlarged view showing a main part of the present invention and viewed from an arrow I in FIG. 2;

FIG. 2 is a plan view of a turret punch press according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a state in which a work clamp is inserted below a punch at a processing position.

FIG. 4 is a flowchart illustrating the operation of the override monitor according to the present invention.

FIG. 5 is a plan view illustrating override monitoring in a conventional turret punch press.

FIG. 6 is a plan view of a turret punch press for explaining conventional override monitoring.

FIG. 7 is a side view for explaining whether a work clamp has been inserted under a punch at a conventional processing position.

[Explanation of symbols]

 Reference Signs List 1 turret punch press (punch press) 9 punch 11 die 21 work clamp 23 shooter 25 discharge shooter 27 CCD camera (image pickup means) 31 CRT (display means) W work K processing position

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI // B21D 45/00 B21D 45/00 B G06T 7/00 G06F 15/62 400

Claims (4)

(57) [Claims] After a workpiece is clamped by a workpiece clamp and moved in a front-rear direction and a left-right direction to position a desired position of the workpiece to a processing position, a desired position of the workpiece is cooperated with a punch and a die at the processing position. in the punch press to perform punching in a position, workpiece clamping work
When entering the clamp danger area, the shooter provided on the front side of the processing position is opened, and the punch and the work clamp are imaged by the image capturing means provided on a part of the discharge shooter, and the image is taken under the punch. An override monitoring method in a punch press, characterized by monitoring whether a work clamp has been inserted. 2. A work clamp, which clamps a work and moves the work in a front-rear direction and a left-right direction to a desired position, and then positions the desired position of the work by cooperation of a punch and a die at the work position. A punch press that performs punching processing is provided, and a shooter that can be opened and closed is provided at the front side of the processing position, and a discharge shooter connected in a state where the shooter is opened is provided below a work table provided in front of the processing position. And an image capturing means for monitoring whether or not a work clamp has been inserted under the punch in the discharge chute. 3. An apparatus according to claim 2, further comprising display means for displaying an image taken by said image pickup means. 4. An image processing apparatus according to claim 2, further comprising an image processing device for taking in an image taken by said image taking means and automatically judging whether or not the work clamp has entered below the punch. Override monitoring device for punch press.