JPH0630840B2 - Mold damage prevention device for press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention is provided with a plurality of mold stations and performs predetermined press working such as punching, drawing, and punching by a mold station selected appropriately. The present invention relates to a die damage prevention device for a press machine.

(Prior Art) For example, in a turret punch press machine, a rotatable turret is provided with a large number of mold stations, and an arbitrary mold can be set in each mold station. Further, it is possible to perform arbitrary press working such as punching, drawing and punching while rotating the turret and moving an arbitrary die station to the working position.

On the other hand, the processing control section for rotating the turret and pressing operation is controlled based on NC data input from an NC tape or the like, and the NC tape is instructed to process the die station number. You can do it.

Therefore, in this turret punch press machine, a predetermined die is set for each turret, a station number for the set die is designated on the NC tape, and this is input to the processing control section, so that a predetermined die can be obtained. The mold was used to perform the predetermined processing.

However, in general, the number of mold stations of the turret is large, for example, 72, and the mold setting work is performed in a limited space, which may cause a setting error, so that a wrong mold may be used. There is a problem that the die is damaged by the press working.

Therefore, conventionally, in order not to make a mistake in setting a die, a correspondence table of the die stations and the die set in each station is written, and the die is set with great care.

(Problems to be Solved by the Invention) However, the conventional mold management based on the correspondence table may be erroneous because it is a manual work of a person, and even if the mold setting error occurs and the mold is damaged. There was a problem that it might end up.

Therefore, in the present invention, in a press mechanism that includes a plurality of mold stations and performs predetermined press working such as punching, drawing, and punching by a mold station selected appropriately, it is possible to easily and surely prevent mold damage due to a mold setting error. It is an object of the present invention to provide a mold breakage prevention device that can prevent such damage.

[Structure of the Invention] (Means for Solving the Problems) As shown in FIG. 1, a mold breakage prevention apparatus for a press machine according to the present invention for solving the above problems is provided with a plurality of mold stations as appropriate. A die data storage unit 1 for registering the die set in each die station in a die damage prevention device of a press machine that performs a predetermined press working such as punching, drawing, and punching by a selected die station, N
Before starting the machining control based on the NC data input from the C data input unit 2 to the machining control unit, the NC data machining type confirmation unit 4 for confirming the machining type of the current machining, and the usage fee specified by the NC data. A die machining type confirmation unit 5 for retrieving the die number used this time from the storage data of the die data storage unit 1 based on the die station number and confirming the machining species of the die concerned
And the machining types confirmed by the two confirmation units 4 and 5 are compared, and if they match, a machining enable signal is output to the machining control unit 3, and if they do not match, it means that the die cannot perform the machining. It is characterized in that a comparison unit 7 for outputting a signal to the alarm output unit 6 is provided.

(Operation) In the die damage prevention device for a press machine according to the present invention, the NC data machining type designated by the NC data and the machining type of the die attached to the used die station are compared, and if they coincide with each other. Processing work is performed, and an alarm is output in the case of disagreement.

Therefore, the die for pressing, drawing, and punching is not operated by other processing types.

Here, it is possible that a wrongly set die is operated erroneously with respect to the same type of machining, but in the same type of machining, the risk of die damage is generally small even if a product defect occurs. For example, in the case of punching and punching, even if there is a mistake in setting the die, damage to the die is avoided. Further, in the case of drawing, since the final drawing height is limited, not all of them lead to die damage.

(Embodiment) Referring to FIG. 2, a turret punch press machine as an example of a press machine rotatably supports an upper turret 8 and a turret 9 and mounts them on arbitrary turrets 8 and 9. The pair of punches 10 and the die 11 are moved to the punch position by the rotation of the motor M, and the head of the punch 10 is pushed down by the ram (strike) 12 located above the punches 10 to lower the punches 10 and the turrets 8 and 9. The press work such as punching, drawing, and punching is performed on the interposed work W.

One end of the work W is gripped by the clamp device 13 and can be moved to any position on the plane coordinates.

In addition, the cylinder device 1 is used to drive the ram 12 up and down.
4 is provided and the device 14 is controlled by a hydraulic unit 15 equipped with a solenoid proportional valve SOL.

As shown in FIG. 3, mold stations Si (i = 1, 2, ...) Are arranged on the turrets 8 and 9, and an arbitrary mold Tj (j = a, b, ...) Is arranged at each station Si. ) Can be set.

Therefore, in this turret punch press machine, by setting a predetermined mold Tj in the mold station Si instructed by the NC tape in advance, the corresponding operation is performed based on the operation of the NC device 15 that has read the NC tape. In FIG. 2, the station number Si to be operated is located immediately below the ram 12, and the ram 12 is driven up and down by a predetermined control pattern. The control pattern is the waveform of the time chart for driving the ram 12 and the velocity diagram of the ascending / descending position.

The NC device 15 incorporates the functional members 1 to 7 shown in FIG.

FIG. 4 is an explanatory diagram of mold data stored in the mold data storage unit 1 shown in FIG.

As shown, the mold data is the mold station number Si
On the other hand, the die number Ti set therein and the adaptive machining type are stored.

Here, the die station number Si and the die number Tj are operation-recorded by the operator at the time of setting the die, but the adaptive machining type is automatically set according to the inputted die number.

FIG. 5 is an explanatory diagram of control patterns.

As illustrated, the control patterns P _A and P of the three examples shown in this example
_B, P _C punch, diaphragm, an example corresponding to the overtaking process, these control patterns is adapted to be commanded by the NC tape. Alternatively, parameters can be set by an NC tape for a previously stored control pattern diagram.

The control pattern P _A of punching lowered to a predetermined depth from the top dead center position, a pattern that repeatedly operated between the bit to a position below the top dead center than the falling edge. The drawing control pattern P _B is a pattern in which the drawing is temporarily stopped at a constant drawing depth and then rises. The punching control pattern P _C is a saw-like pattern in which the workpiece W is slightly moved while it is lowered to a certain depth from the top dead center, the punching blade is struck against the workpiece W, and the workpiece W is lifted to a slightly higher position. After cutting the work, the pattern is such that the chips are cut off by finally moving to a deeper position.

Therefore, the NC data processing type confirmation unit 4 shown in FIG.
Indicates that the machining type of machining this time can be confirmed based on the Nc data.

FIG. 6 is a flowchart of a machining type discrimination procedure for preventing die damage.

First, before starting the machining operation, the mold number Tj corresponding to the mold station Si is registered in step 601 and the mold data shown in FIG. 4 is created.

Next, when the machining work is actually started and the NC tape is input to the NC data input section 2, the machining type and the die station number Si are extracted from the NC data in step 602, and the die station number is extracted in step 603. The mold number Tj corresponding to Si is retrieved.

Next, in steps 604 and 605, it is compared whether the mold Tj can be adapted to the machining type according to whether the control pattern type shown in FIG. 5 matches the machining type confirmed in step 602. Processing control is performed in step 606, and if they do not match, an alarm is output in step 607.

As described above, in the turret punch press machine of the present example, the machining can be started only when the machining type of the die matches the machining type specified by the NC data, and when they do not coincide, an alarm can be generated.

That is, assuming that the maximum control depths of the ram 12 for punching, drawing and punching are H ₁ , H ₂ and H ₃ , respectively, H ₂ <H ₁ <H ₃ is generally satisfied. There is no risk of damaging the mold by operating the mold (H ₂ ) according to the control pattern of punching (H ₁ ) or punching (H ₃ ). In addition, the punching die (H ₁ ) is prevented from being accidentally operated with the control pattern of the punching (H ₃ ) to damage the die.

In the above embodiment, the prohibition is made on different machining types in the set mold, but in order to prevent damage to the mold in the drawing process, the same machining type is also subdivided into different machining types from the subdivided machining types. You may prohibit all seeds.

The present invention is not limited to the above embodiments, but can be carried out in appropriate modes by making appropriate statistical changes.

[Effects of the Invention] As described above, the present invention is the device for preventing damage to the mold of the press machine as set forth in the claims. Therefore, it is possible to easily and reliably prevent damage to the mold due to a mistake in setting the mold.

[Brief description of drawings]

FIG. 1 is a diagram showing an outline of the present invention, FIG. 2 and the following are examples, and FIG. 2 is a side view of a turret punch press machine.
FIG. 3 is an enlarged plan view showing a mold station of the turret, FIG. 4 is a view for explaining mold data, FIG. 5 is a view for explaining a control pattern, and FIG. 6 is a flowchart for processing type discrimination processing. 1 ... Mold data storage unit 2 ... NC data input unit 3 ... Machining control unit 4 ... NC data Machining type confirmation unit 5 ... Mold machining type confirmation unit 6 ... Alarm output unit 7 ... Comparison unit

Claims (1)

[Claims] 1. A mold breakage prevention device for a press machine, which comprises a plurality of mold stations and performs predetermined press working such as punching, drawing, and punching by appropriately selected mold stations, and is set for each mold station. A mold data storage unit for registering a mold, and an NC data machining type confirmation unit for confirming the machining type of the present machining before the start of machining control based on the NC data input to the machining control unit from the NC data input unit, A mold machining type confirmation unit that searches the mold number of the present use from the stored data of the mold data storage unit based on the mold station number specified by the NC data and confirms the machining type of the mold. , Comparing the machining types confirmed by both confirmation units, if they match, a machining enable signal is output to the machining control unit, and if they do not match, a signal indicating that the mold cannot perform the machining is output. Mold damage prevention apparatus of a press machine, characterized in that it comprises a comparison unit for outputting the alarm output unit.