JP2002066655A - Punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch press capable of correctly positioning a cartridge in a prescribed location even if the cartridge in process of movement deviates from the transfer means. SOLUTION: A cartridge transfer means 10 which transfers and positions the cartridge 4 mounted with tools along the linear channel within a punching frame 2 is provided. And, a cartridge position detecting means 27 and a restoration controlling means 25 are provided. The cartridge position detecting means 27 is capable of detecting the position on the linear channel of the cartridge in a status that the cartridge 4 is deflected from the cartridge transfer means 10. The restoration controlling means 25 is a restoring means capable of restoring the cartridge 4 to a state that the cartridge 4 transfer is feasible from a state that the cartridge 4 is deflected from the cartridge transfer means 10 based on the detecting result of the cartridge position by the cartridge position detecting means 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge-type punch press in which a cartridge on which a tool is mounted is moved along a linear path in a punch frame to position the cartridge.

[0002]

2. Description of the Related Art As a conventional punch press of this type, there is one in which a cartridge moving means for moving a cartridge along a linear path is constituted by an endless chain or the like. A predetermined portion of the endless chain is connected to the cartridge via a connector, and the cartridge is moved by driving the cartridge moving means, thereby positioning the cartridge at a predetermined position in the punch frame.

In the above-described cartridge moving means, an error may occur such that the cartridge comes off the endless chain during the movement. Conventionally, when such an error occurs, the cartridge moving means is urgently stopped, the cartridge is manually reconnected to the original position of the endless chain, and the movement is restarted.

[0004]

However, if the movement is resumed by manually reconnecting as described above, the position where the cartridge has come off, that is, the movement restart position, cannot be correctly determined. However, there has been a problem that the cartridge cannot be positioned correctly at a desired position.

An object of the present invention is to provide a punch press which can reconnect a cartridge to a cartridge moving means and correctly position the cartridge at a desired position even if the cartridge comes off the cartridge moving means during movement.

[0006]

The structure of the present invention will be described with reference to FIG. 5 corresponding to the embodiment. This punch press includes a cartridge moving means (10) for positioning a cartridge (4) by moving a cartridge (4) on which a tool is mounted along a linear path within a punch frame, and Detection means (2
7) and restoration control means (25). The cartridge position detecting means (27) is a means capable of detecting the position of the cartridge (4) on the linear path in a state where the cartridge (4) is disengaged from the cartridge moving means (10). The restoration control means (25) restores the cartridge moving means (10) from the disengaged state to a state in which the cartridge (4) can be moved based on the detection result of the cartridge position by the cartridge position detection means (27). It is a means to make it. According to this configuration, when the cartridge (4) comes off the cartridge moving means (10), the position on the linear path is detected by the cartridge position detecting means (27). Thereafter, based on the detection result, the cartridge (4) is restored to a state in which the cartridge (4) can be moved from the disengaged state by the control of the cartridge moving means (10) by the restoration control means (25). In this manner, the cartridge moving means (10) can be automatically restored to the state before the cartridge (4) comes off, and the cartridge can be moved to the correct position.

In the present invention, the cartridge moving means (10) moves the cartridge (4) by a moving body (12) moving along the linear path, and the cartridge position detecting means (27) A sensor (16) provided on the moving body (12) for detecting the cartridge (4), and a cartridge position based on the position of the moving body (12) when the sensor (16) detects the cartridge (4). It may be constituted by an operation means (26) for performing an operation. In the case of this configuration, when the cartridge (4) is detached from the moving body (12), the moving body (12) is moved and the position of the moving body (12) at which the sensor (16) detects the cartridge (4). The cartridge position can be calculated by the calculating means (26) based on the position. Therefore, the cartridge position can be easily and correctly determined from the control system of the moving body (12), and the cost can be reduced.

In the present invention, when a machining control means (19) for controlling a mechanical part of a punch press by a machining program (20) is provided, the machining control means (1) is provided.
9) has an emergency stop means (22) for emergency stop of the mechanical part when the cartridge (4) comes off the cartridge moving means (10), and the processing control means (19) is provided with the emergency stop means Command position storage means (23) for storing the position of the command of the machining program (20) when the operation is performed, and this command position storage means for stop (23)
Operation restart means (24) for restarting the operation according to the machining program in accordance with the contents stored in the operation program. In this configuration, when the cartridge (4) comes off the cartridge moving means (10), the mechanical part of the punch press is emergency stopped by the emergency stop means (22). This machining program for emergency stop (2
0) is stored in the stop-time command position storage means (23), and the operation restart means (2) is stored in accordance with the stored contents.
4) restarts the operation according to the machining program (20). Therefore, it is possible to reliably return to the state before the stop and restart the operation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. The punch press 1 is of a cartridge type, and tables 3 are provided on both sides of a punch frame 2 as shown in a plan view in FIG. A cartridge 4 having a plurality of tools mounted on the punch frame 2
Are installed movably in the longitudinal direction (Y direction) of the punch frame 2 and a press head 5 for hitting (that is, punching) a punch tool of the cartridge 4 is provided. The cartridge 4 on which a punch tool is mounted and the cartridge on which a die tool is mounted are vertically arranged as a set, and are used by being fixed at a predetermined position in the punch frame 2. The press head 5 is movable within a predetermined range in the movement direction (Y direction) of the cartridge 4 in the punch frame 2 in order to select an arbitrary tool mounted on the cartridge 4. FIG. 2 is a plan view showing an example of the cartridge 4 on which the punch tool 6 is mounted. In the cartridge 4 on which the die tool is mounted, a plurality of die tools are mounted so as to correspond to the punch tool 6 like the cartridge 4 on the punch tool side.

As shown in FIG. 1, the table 3 is provided with a plate feeding means 8 for moving the plate W on the table. The plate feeding means 8 can move back and forth in two axial directions (X-axis direction and Y-axis direction) orthogonal to the plate material W.

As shown in the side view and the plan view in FIGS. 3 and 4, the upper and lower cartridges 4 are moved along the predetermined linear path in the longitudinal direction (Y direction) of the punch frame 2 in the punch frame 2. A guide 9 for guiding freely and a cartridge moving means 10 for moving the cartridge 4 forward and backward along the guide 9 are provided. The cartridge moving means 10 includes an endless winding body 11 such as a belt or a chain, and a moving body 1 provided on the winding body 11.
And 2. The winding body 11 is wound around a pulley 13 installed before and after the punch frame 2 and is rotationally driven by a driving source 14 such as a motor. The punch frame 2 has an opening 2a that penetrates the side of the punch frame 2, and the plate material W on the table 3 can move across both sides of the punch frame 2 through the opening 2a.

[0012] As shown in FIG.
A detachable engagement pin 15 is provided in an engaged hole 4a provided at a predetermined position on one side of the cartridge 4, and
The direction of movement of the cartridge from this engagement pin 15 (Y direction)
A sensor 16 for detecting the cartridge 4 is provided at a position separated by a predetermined interval α. The cartridge 4
The engaged hole 4a is provided at an intermediate position in the movement direction of the cartridge 4 here.

As shown in FIG. 3, the press head 5 is installed along a guide 17 provided on the punch frame 2 so as to be able to advance and retreat in the longitudinal direction (Y direction) of the punch frame 2. Driven forward and backward.
The press head advance / retreat device 18 includes a servo motor 18a
And a feed screw 18b such as a ball screw.

FIG. 5 is a schematic diagram showing the relationship between a control system for controlling the mechanical part of the punch press 1 and the cartridge moving means 10. The processing control means 19 is a means for controlling the mechanical part of the punch press 1 by a processing program 20, and is composed of a computer-based numerical controller (NC) and a programmable controller (PC). The machining control means 19 includes, in addition to a program execution means 21 for decoding and executing a machining program 20, an emergency stop means 22, a stop-time command position storage means 23, and an operation restart means 2
4, a restoration control unit 25 and a calculation unit 26 are provided.

The cartridge position detecting means 27 is constituted by the sensor 16 provided on the moving body 12 and the calculating means 26. This cartridge position detecting means 27
Is a unit that can detect the position of the cartridge 4 on the linear path in a state where the cartridge 4 is detached from the cartridge moving unit 10. The calculating means 26 is means for calculating the cartridge position from the position of the moving body 12 when the sensor 16 detects the cartridge 4.

The program execution means 21 includes a cartridge movement control means 28 for controlling movement of the cartridge 4 by the cartridge movement means 10. The emergency stop means 22 is provided when the cartridge 4 is
It is a means to make an emergency stop of the mechanical part when it comes off. The stop command position storage means 23 is a means for storing a command position (for example, a sequence number or an address of a program storage area) of the machining program 20 when the emergency stop is performed. The operation resuming means 24 is means for resuming the operation according to the machining program 20 in accordance with the contents stored in the stop command position storage means 23. The restoration control unit 25 is a unit that restores the cartridge moving unit 10 from a state in which the cartridge 4 is removed to a state in which the cartridge 4 can be moved based on the cartridge position detected by the cartridge position detection unit 27.

The punching operation by the punch press 1 having the above-described structure is performed as follows. First, the sheet feeding means 8
The feed operation of the plate material W in the two orthogonal directions by the
Is performed. Thereafter, the movement of the press head 5 by the press head moving device 18 causes the cartridge 4 to move.
Is selected, the press head 5 is driven, and the punching tool 6 punches the plate material W.

When the cartridge 4 is detached from the cartridge moving means 10 during the movement of the cartridge 4 by the cartridge moving means 10, the operation is resumed by restoring the state before the detachment. This operation is performed as follows according to the flowchart shown in FIG.

During the movement of the cartridge 4, the moving body 12
Is disengaged from the engaged hole 4a of the cartridge 4, and the
Is released (step S1), the emergency stop means 22 is operated, and the mechanical part of the punch press 1 including the cartridge moving means 10 is emergency stopped (step S2). The detachment of the cartridge 4 is detected, for example, by a change in the current of the drive source 14 in the cartridge moving means 10 or the like. At this time, the stop command position storage means 23 stores the position of the command of the machining program 20 when the emergency stop is performed (step S3).

Next, by the operations of steps S4 to S7, the position of the stopped cartridge 4 in the moving direction, that is, the Y-axis position is detected. First, as shown in FIG. 7A, for example, the cartridge moving means 1 moves so that the moving body 12 approaches the cartridge 4 stopped from the origin side of the Y axis.
0 is driven (step S4). At this time, the moving body 1
The sensor 16 on 2 detects one end of the cartridge 4.
FIG. 7D shows a waveform of a detection signal of the sensor 16 at this time. In response to this detection, the position of the moving body 12 at the time of detection, that is, the sensor position Y1, is stored in the storage unit (not shown) of the processing control means 19 (step S5). The position of the moving body 12 is obtained from a position detector 14a such as an encoder provided in the drive source 14 of the cartridge moving means 10.
Further, the moving body 12 moves as shown in FIG. 7B, and the sensor 16 on the moving body 12 detects the other end of the cartridge 4. FIG. 7E shows a waveform of a detection signal of the sensor 16 at this time. In response to this detection, the position of the moving body 12 at the time of detection, that is, the sensor position Y2, is
9 (step S6).
Next, the sensor positions Y1, Y2 stored in the storage unit are described.
Then, the stop position of the cartridge 4 is calculated by the calculating means 26 (step S7). Here, as the stop position of the cartridge 4, the engaging pin 1 is inserted into the engaged hole 4a.
5 is (Y1 + Y2) / 2
+ Α. Here, α is the distance between the engagement pin 15 and the sensor 16 in the Y direction.

Thereafter, under the control of the restoration control means 25, the moving body 12 is moved to the calculation position, that is, the cartridge position, as shown in FIG.
8). As a result, the engaging pin 15 of the moving body 12 is engaged with the engaged hole 4a of the stopped cartridge 4, and the cartridge 4 can be moved from a state where the cartridge 4 is disengaged from the cartridge moving means 10. The state is restored (step S9). Next, the operation restarting means 24 restarts the operation according to the machining program 20 in accordance with the contents stored in the stop command position storage means 23 (step S1).
0).

By the above operation, even if the cartridge 4 comes off the cartridge moving means 10 during the movement of the cartridge 4, the cartridge moving means 10 is automatically restored to the state before the cartridge 4 came off, and the cartridge 4
Can be moved to the correct position.

In this embodiment, when the cartridge 4 comes off the moving body 12, the moving body 12 is moved so that the sensor 16 detects the cartridge 4.
Is calculated and the cartridge position is calculated by the calculating means 26 based on the position, so that the moving axis (Y
The position of the cartridge can be easily and correctly determined from the shaft), and the cost can be reduced.

Further, in this embodiment, when the cartridge 4 comes off, the mechanical part of the punch press 1 is emergency-stopped by the emergency stop means 22. Since the command position storage means 23 stores the data, and the operation resuming means 24 restarts the operation according to the processing program 20 in accordance with the stored contents, the operation can be surely returned to the state before the stop and restarted.

[0025]

According to the present invention, there is provided a punch press including a cartridge moving means for moving a cartridge on which a tool is mounted along a linear path in a punch frame to position the cartridge. Cartridge position detecting means capable of detecting the position of the cartridge on the linear path in a state where the cartridge is removed from the cartridge, and the cartridge moving means capable of moving the cartridge from the detached state based on the detection result of the cartridge position. Since the restoration control means for restoring the cartridge is provided, the cartridge movement means can be automatically restored to the state before the cartridge is detached, and the cartridge can be moved to the correct position. In the present invention, the cartridge moving means moves the cartridge by a moving body that moves along the linear path. The cartridge position detecting means includes a sensor provided on the moving body to detect the cartridge, When the sensor is configured with calculating means for calculating the cartridge position from the position of the moving body when the cartridge is detected, when the cartridge is detached from the moving body, the cartridge position is easily correctly determined from the moving axis of the moving body. Cost can be reduced. Further, in the present invention, there is provided processing control means for controlling a mechanical part of the punch press by a processing program, and the processing control means includes an emergency stop means for performing an emergency stop of the mechanical part when the cartridge comes off the cartridge moving means. And the processing control means stores a command position of a processing program at the time of performing the emergency stop, a stop command position storage means, and the processing in accordance with the contents stored in the stop command position storage means. In the case where it is provided with operation restart means for restarting the operation by the program, the stop command position storage means stores the position of the command of the machining program at the time of emergency stop, and the operation restart means according to the stored contents. Since the operation according to the machining program is restarted, it is possible to reliably return to the state before the stop and restart the operation.

[Brief description of the drawings]

FIG. 1 is a plan view of a punch press according to an embodiment of the present invention.

FIG. 2 is a plan view of a cartridge installed in the punch press.

FIG. 3 is a partially omitted side view of a punch frame in the punch press.

FIG. 4 is a partially omitted plan view of a punch frame in the punch press.

FIG. 5 is a schematic diagram showing a relationship between a control system for controlling a mechanical part of the punch press and a cartridge moving unit.

FIG. 6 is a flowchart showing a restoring operation after the cartridge is detached from the cartridge moving means.

FIG. 7 is an explanatory diagram of the restoration operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Punch press 2 ... Punch frame 4 ... Cartridge 6 ... Punch tool 10 ... Cartridge moving means 12 ... Moving body 16 ... Sensor 19 ... Processing control means 20 ... Processing program 22 ... Emergency stop means 23 ... Stop command position storage means 24 ... Operation restart means 25 ... Restoration control means 26 ... Calculation means 27 ... Cartridge position detection means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B30B 15/26 B30B 15/26

Claims (3)

[Claims] 1. A punch press having a cartridge moving means for moving a cartridge on which a tool is mounted along a linear path within a punch frame to position the cartridge, wherein the cartridge is disengaged from the cartridge moving means. Cartridge position detecting means for detecting the position of the cartridge on the linear path, and restoration control for restoring the cartridge moving means from the disengaged state to a state in which the cartridge can be moved based on the detection result of the cartridge position. Punch press with means. 2. The apparatus according to claim 1, wherein said cartridge moving means moves the cartridge by a moving body moving along said linear path, and said cartridge position detecting means is provided on said moving body to detect a cartridge. 2. The punch press according to claim 1, wherein said sensor comprises a calculating means for calculating the cartridge position from the position of the moving body when the sensor detects the cartridge. 3. A processing control means for controlling a mechanical part of the punch press by a processing program, the processing control means having an emergency stop means for emergency stopping the mechanical part when the cartridge comes off the cartridge moving means. And the processing control means includes a stop command position storage means for storing a position of a command of the processing program when the emergency stop is performed, and the processing program according to the contents stored in the stop command position storage means. The punch press according to claim 1 or 2, further comprising operation restart means for restarting the operation according to (1).