JP4596497B2 - Bending machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a bending apparatus, in particular, when performing a mold exchanging operation manually, the exchanging operation is performed easily and safely, and a bending operation is performed so that preparatory work before replacement and return work after replacement are performed quickly. It relates to a processing apparatus.
[0002]
[Prior art]
Conventionally, a bending apparatus, for example, a panel bender 30 (FIG. 1) clamps a workpiece W by a top die 31 and a bottom die 32, and bends the workpiece W by turning a bend beam 33 up and down.
[0003]
In this case, the top die 31 (FIG. 7) has a center die 31A, a hollow die 31B, and a segment die 31C as is well known.
[0004]
When the length L of the top die 31 is set according to the size of the workpiece W to be processed (FIG. 7), the center mold 31A may be manually replaced so as to match the length L. .
[0005]
[Problems to be solved by the invention]
[0006]
However, when the mold is manually exchanged in this way, conventionally, the preparatory work before and after the mold exchange and the return work are performed by the operator himself operating the NC control panel.
[0007]
For example, the operator moves the Z-axis 22 (FIG. 1) to raise the clamp beam 39, or drives the cylinders 37 to 40 (FIGS. 1 and 7) to release unnecessary molds, so that the worker can Operate the machine to make it easy to change molds.
[0008]
However, it is troublesome and time-consuming for an operator to perform such an operation.
[0009]
As a result, the machining efficiency of the workpiece W is lowered, and consequently the productivity is also lowered.
[0010]
Conventionally, it is difficult for an operator to get close to a die to be exchanged, so that it is difficult to exchange the die.
[0011]
For example, when exchanging the center mold 31A (FIGS. 4 and 7), the operator must be positioned at the approximate center of the machine, but the front table 48 (FIG. 4) becomes an obstacle and the mold is replaced. Is very difficult.
[0012]
Further, conventionally, when an operator approaches the mold, the control power supply is shut off for safety.
[0013]
However, when the control power supply is cut off, the control power supply must be restarted after the mold replacement, and the initial operation such as the origin return operation must be performed again.
[0014]
As a result, the worker is troublesome and may fail to cut off the control power supply from the beginning, which is extremely dangerous.
[0015]
An object of the present invention is to easily and safely perform a mold exchanging operation in a bending apparatus that manually performs mold exchanging, and to quickly perform a preparation operation and a return operation before and after the mold exchanging.
[0016]
[Means for Solving the Problems]
In order to solve the above problems, according to the present invention, as shown in FIGS.
(A) Workpieces that are manually transferred to the front table 48 by exchanging dies and driving actuators such as servo motors M1, M2,... By the power sources D1, D2,. In a bending machine that bends W,
(B) a mold change switch 5 that can be operated by an operator;
A front table 48 provided so as to be freely opened and closed;
Operate the mold change switch 5 and Dies that position each axis at a mold replacement easy position, miss out-of-target molds, open the front table 48, and shut off the power sources D1, D2,. Die that replaces the power supply D1, D2,... With the control power supply 1 in the activated state, closes the front table 48, and positions each shaft and the mold at a workable position. Return operation after replacement There is provided a bending apparatus characterized by having a die exchange control means 4B for controlling the above.
[0017]
Therefore, according to the configuration of the present invention, by providing the mold replacement switch 5 (FIGS. 1 and 2), the mold replacement control means 4B can be operated only by the operator operating the mold replacement switch 5. The preparation and return operations before and after the mold replacement are performed very quickly, and the front table 48 is opened by opening and closing the front table 48 (FIGS. 1, 3, and 4). If this is done (FIG. 1), the work area R is secured (FIG. 4), and the operator can approach the mold, so that the mold can be easily exchanged. Since the power supplies D1, D2,... Can be shut off, work can be performed safely.
[0018]
For this reason, in a bending apparatus for manually exchanging molds, it is possible to perform mold exchanging work easily and safely, and to quickly perform preparatory work before and after mold exchanging and return work.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the accompanying drawings by embodiments.
FIG. 1 is an overall view of an embodiment of the present invention.
[0020]
The bending apparatus shown in FIG. 1 is, for example, a panel bender 30 and manually exchanges dies as will be described later. After the work W carried on the front table 48 is conveyed and positioned by the manipulator 34, the top die 31 is obtained. And the bottom die 32 is clamped and bending is performed by the bend beam 33.
[0021]
This panel vendor 30 (FIG. 1) has an NC 4 and its control panel 6, and a mold change switch 5 is added to the control panel 6.
[0022]
The mold change switch 5 is composed of a key switch 5A and a push button switch 5B, which are combined to perform a preparatory operation before replacing the mold (steps 201 to 204 in FIG. 6) and a preparatory operation after replacing the mold. (Steps 205 to 207 in FIG. 6) are performed respectively (Steps 101, 102 and 103, 104 in FIG. 6).
[0023]
Of these, the key switch 5A occupies either the “ON” or “OFF” position and can be inserted and removed. The operator initially (step 101 in FIG. 6) sets the key switch 5A to “ON”. Keep it unplugged and always carry it with you during mold replacement so that no third party can use it.
[0024]
When the push button switch 5B is pressed after the key switch 5A is operated (step 101, 102 or step 103, 104 in FIG. 6), the trigger unit 5C (FIG. 2) outputs an activation signal SK, which will be described later. The sequence control unit 4B1 of the mold exchange control means 4B to be activated is activated.
[0025]
For example, when performing the preparatory operation (steps 201 to 204 in FIG. 6), when the operator turns the key switch 5A to “ON” (FIG. 2), the sequence control unit 4B1 of the mold replacement control unit 4B is configured. The preparation control means 4B1A is connected to the trigger unit 5C via the key switch 5A.
[0026]
Therefore, when the push button switch 5B is pressed, the activation signal SK output from the trigger unit 5C is input to the preparation control means 4B1A and activated.
[0027]
When the return operation is performed (steps 205 to 207 in FIG. 6), when the operator turns the key switch 5A to “OFF” (FIG. 2), the return control means 4B1B constituting the sequence control unit 4B1 is operated by the key. The trigger unit 5C is connected via the switch 5A.
[0028]
Accordingly, when the push button switch 5B is pressed, the activation signal SK output from the trigger unit 5C is input to the return control means 4B1B to start the return control means 4B1B.
[0029]
By providing the die change switch 5, the die change control means 4B is activated only by the operator operating it, and the preparation operation and the return operation are performed very quickly.
[0030]
NC4 (FIG. 1) is constituted by a CPU 4A, a mold exchange control means 4B, and an actuator control unit 4C.
[0031]
The CPU 4A controls the whole by giving an instruction to the mold exchange control means 4B according to a procedure (for example, FIG. 6) for carrying out the present invention.
[0032]
The mold exchange control means 4B (FIG. 1) operates when an operator operates the mold exchange switch 5, and each axis such as the Z axis 22 or the like (FIG. 1) the mold via the actuator controller 4C. (FIG. 7) The actuator is controlled (for example, steps 201 to 203 or 206 to 207 in FIG. 6), and the power supply circuit 3 is controlled (FIG. 1) to cut off the power supplies D1, D2,. Step 204 in FIG. 6) or return (Step 205 in FIG. 6).
[0033]
Details of the mold exchange control means 4B are shown in FIG. 2, and are composed of a sequence control unit 4B1 and a hard timer unit 4B2.
[0034]
The sequence control unit 4B1 includes a preparation control unit 4B1A and a return control unit 4B1B. The preparation control unit 4B1A controls the preparatory operation before the mold replacement (steps 201 to 204 in FIG. 6), and the return control unit 4B1B Control of the return operation after mold replacement (steps 205 to 207 in FIG. 6) is performed.
[0035]
As described above, the operation of these means is switched by switching the key switch 5A of the mold exchange switch 5 to “ON” or “OFF” (FIG. 2).
[0036]
The preparation control means 4B1A (FIG. 2) performs various controls such as opening the front table 48 via the actuator control unit 4C (FIG. 1, control signal S1) so that the operator H can easily change the mold. (Steps 201 to 203 in FIG. 6), a cutoff signal S2 is transmitted to the power supply circuit 3 (FIGS. 1 and 5), so that the power supply D1, D2,... Is blocked (step 204 in FIG. 6).
[0037]
The return control means 4B1B (FIG. 2) sends the return signal S5 to the power supply circuit 3 (FIGS. 1 and 5), thereby returning the power supplies D1, D2,. After that (step 205 in FIG. 6), control such as closing of the front table 48 is performed via the actuator controller 4C (FIG. 1, control signal S1) (steps 206 to 207 in FIG. 6) to process the workpiece W. Get ready to do it.
[0038]
The hard timer unit 4B2 (FIG. 2) controls the control power supply 1 when a preset time (step 301 in FIG. 6) has passed (YES in step 302 in FIG. 6) regardless of whether the sequence control unit 4B1 is normal or abnormal. Are shut off in the activated state (step 303 in FIG. 6).
[0039]
In this case, the sequence control unit 4B1 is prepared for a case where the power sources D1, D2,.
[0040]
The hard timer unit 4B2 (FIG. 2) includes a time setting unit 4B2A, a timer 4B2B, and a timer contact 4B2C.
[0041]
With this configuration, when the key switch 5A (FIG. 2) of the mold changeover switch 5 is switched to “ON”, the trigger signal 5K is output from the trigger unit 5D, and the time setting unit 4B2A is activated.
[0042]
As a result, a predetermined time is set in the timer 4B2B, and when that time elapses, the timer contact 4B2C is opened and the emergency shut-off signal S3 is transmitted to the power supply circuit 3, and the power supplies D1, D2,. The
[0043]
The power supply circuit 3 (FIG. 1) is connected to the control power supply 1 via the bus 2, and the power supply circuit 3 (FIG. 5) is connected to the first relay X1 on the power supply D1, D2. It is comprised by the 2nd relay X2 by the side of the power supply 1.
[0044]
With this configuration, when the power source D1, D2,... Is shut off while the control power source 1 is in an activated state (step 204 in FIG. 6), the shut-off signal is as long as the sequence control unit 4B1 is normal (FIG. 2). S2 is transmitted to the first relay X1 (FIG. 5), and the first relay X1 is sequentially opened based on the sequence control.
[0045]
However, when the sequence control unit 4B1 is abnormal, the emergency cut-off signal S3 is transmitted from the hard timer unit 4B2 to the second relay X2 (FIG. 5), the second relay X2 is opened, and the control power supply 1 is activated. The power sources D1, D2,.
[0046]
In relation to this, when the power sources D1, D2,... Are restored (step 205 in FIG. 6), the power source is usually supplied from the restoration control means 4B1B of the sequence controller 4B1 as described above. A return signal S5 is transmitted to the first relay X1 of the circuit 3, and the first relay X1 is sequentially closed based on the sequence control.
[0047]
However, if the sequence control unit 4B1 is abnormal and the hard timer unit 4B2 cuts off the power sources D1, D2,..., The second relay X2 is already open (FIG. 5), so Step 205 in FIG. 6), a return signal S5 is transmitted from the return control means 4B1B of the sequence control unit 4B1 that has returned to normal to the second relay X2, and the second relay X2 is sequentially closed based on the sequence control.
[0048]
Thus, according to the present invention, by providing the mold replacement control means 4B (FIGS. 1 and 2), the sequence control section 4B1 and the hard timer section 4B2 constituting the mold replacement control means 4B are provided. Since the first relay X1 and the second relay X2 of the power supply circuit 3 are opened (FIG. 5), the power supplies D1, D2,... Step 204), the operator can safely perform the mold change.
[0049]
Further, in front of the panel vendor 30 (FIG. 1), a front table 48 into which the workpiece W is carried is installed, and the front table 48 is connected to the support table 61 by a hinge 49 (FIG. 3). It can be opened and closed freely.
[0050]
With this configuration, if the front table 48 is opened before the mold replacement (FIG. 1), the worker H can secure the work area R (FIG. 4) and the mold to be replaced, for example, the center mold It becomes possible to approach 31A (FIGS. 4 and 7), and the operation becomes extremely easy.
[0051]
The front table 48 (FIG. 4) is divided into right and left so that the manipulator 47 can pass through.
[0052]
On the lower surface of each front table 48 (FIG. 3), the tip of the piston rod 54 of the cylinder 62 is coupled by a hinge 53, and the lower end of the cylinder 62 is hinged to a bracket 51 attached to the leg portion 50 of the support table 61. 52 is connected.
[0053]
With this configuration, the front table 48 can be smoothly opened and closed even when the cylinder 62 swings during operation.
[0054]
Two branch pipes 57 and 58 extend from the cylinder 62 (FIG. 3) and are coupled to the main pipe 60 via the electromagnetic valve SOL. The main pipe 60 is coupled to the air compressor 56.
[0055]
With this configuration, air adjusted to a predetermined pressure flows from the air compressor 56 through the main pipe 60 and passes through one of the branch pipes 57 and 58 switched by the electromagnetic valve SOL driven by the power source DS. 62 is activated.
[0056]
Thereby, the front table 48 can be freely opened and closed.
[0057]
Therefore, in the case of the preparatory operation before the mold replacement, the operator operates the mold replacement switch 5 (FIGS. 1 and 2) (steps 101 and 102 in FIG. 6) to thereby control the mold replacement control means. The front table 48 is opened (step 203 in FIG. 6) through the preparation control means 4B1A constituting the sequence control unit 4B1 of 4B (control signal S1 in FIGS. 1 and 2), and the operator H (FIG. 4). It becomes easy to approach the mold 31A to be exchanged.
[0058]
Further, in the case of the return operation after the mold replacement, the operator similarly operates the mold replacement switch 5 (FIGS. 1 and 2) (steps 103 and 104 in FIG. 6) to control the mold replacement. The front table 48 is closed (step 206 in FIG. 6) via the return control means 4B1B constituting the sequence control unit 4B1 of the means 4B (the control signal S1 in FIGS. 1 and 2), and the operator H himself is troublesome to return. You do n’t have to work.
[0059]
Further, the air compressor 56, which is the actuator of the front table 48, and the power source DS of the electromagnetic valve SOL are shut off via the preparation control means 4B1A (FIG. 2) (step 204 in FIG. 6) or returned. The control means 4B1B is returned via (FIG. 2) (step 205 in FIG. 6).
[0060]
A carry-out conveyor 55 is provided behind the front table 48 (FIG. 4) so that the processed workpiece W is carried out to the outside.
[0061]
The carry-out conveyor 55 (FIG. 4) is also divided into right and left so that the manipulator 47 can pass through. The drive pulley 59 of each carry-out conveyor 55 is rotated by a geared motor GM, and the geared motor GM is supplied from the power source DI. It is driven by an inverter IN that converts direct current into alternating current.
[0062]
Therefore, the power source DI of the inverter IN which is an actuator of the carry-out conveyor 55 is also shut off via the preparation control means 4B1A (FIG. 2) (step 204 in FIG. 6) or via the return control means 4B1B (FIG. 2). (Step 205 in FIG. 6)
[0063]
Further, the manipulator 47 in front of the panel vendor 30 (FIG. 1) grips the workpiece W carried on the front table 48 with the upper turret 35 and the lower turret 36, and conveys and positions the workpiece W toward the panel vendor 30 side. .
[0064]
The manipulator 47 (FIG. 1) is screwed onto a Y-axis 43, which is a ball screw, via a nut 42. The Y-axis 43 is rotated by a servo motor M2, and the servo motor M2 (FIG. 4) It is driven by the power supply D2 (FIG. 5).
[0065]
Therefore, for example, in the case of a preparatory operation before mold replacement, the manipulator 47 is moved backward by driving the Y axis 43 (step 201 in FIG. 6) via the mold replacement control means 4B (FIG. 2). After making the mold replacement work easy, the power source D2 of the servo motor M2 as an actuator is shut off (step 204 in FIG. 6).
[0066]
Further, the manipulator 47 (FIG. 1) has a servo motor M5 that rotates the lower turret 36 while holding the workpiece W, and rotates and positions the workpiece W. The servo motor M5 is also connected to the servo motor M2. The power source is driven by a power source similar to the power source D2, and the power source is shut off via the die change control means 4B (FIG. 2), for example, in a preparatory operation before the die change (step 204 in FIG. 6). ).
[0067]
On the other hand, the panel vendor 30 (FIG. 1) has a top die 31 and a bottom die 32 for clamping the workpiece W conveyed and positioned by the manipulator 47.
[0068]
The top die 31 is attached to a clamp beam 23 (FIG. 1) via a holder 34 (FIG. 7). The clamp beam 23 is moved up and down by a Z axis 22, and the Z axis 22 is driven by a power source D1. It is rotated by the servo motor M1.
[0069]
Therefore, for example, in the case of a preparatory operation before mold replacement, the operator moves the Z-axis 22 through the mold replacement control means 4B (FIG. 2) to raise the clamp beam 23 (step 201 in FIG. 6). After making it easy to replace the mold, the power source D1 of the servo motor M1, which is an actuator, is shut off (step 204 in FIG. 6).
[0070]
As is well known, the top die 31 (FIG. 7) includes a center die 31A mounted in a holder 34, and hollow die 31B on both sides of the machine center MC adjacent to the center die 31A. And a segment mold 31C outside each hollow mold 31B.
[0071]
Of these, 14 center molds 31A to be manually replaced are prepared, for example, having a length of 100 to 197.5 mm, and stored in, for example, a mold rack (not shown).
[0072]
Accordingly, when the length L of the top die 31 is set in accordance with the size of the workpiece W to be processed, the work area is opened by opening the front table 48 (FIGS. 1 and 4) constituting the present invention. After securing R (FIG. 4), the worker H takes out necessary ones of these center molds 31A from the mold rack and replaces them manually.
[0073]
Further, in the holder 34, a centering cylinder 37, an inter-mold cylinder 38, a center mold width adjusting cylinder 39, and an outside cylinder 40 are provided on both the left and right sides.
[0074]
These cylinders have an electromagnetic valve SOL, its power source DS, and an air compressor 56 as shown in FIG.
[0075]
Therefore, for example, in the case of the preparatory operation before the mold replacement, the cylinders 37 to 40 are operated via the mold replacement control means 4B (FIG. 2) to release the non-target mold (FIG. 6). Step 202) After making it easy for the operator to perform the mold exchanging work, for example, the power source of an air compressor or an electromagnetic valve as an actuator is shut off (Step 204 in FIG. 6).
[0076]
Further, the panel bender 30 (FIG. 1) has a bend beam 33 for bending the workpiece W clamped by the top die 31 and the bottom die 32.
[0077]
The bend beam 33 is coupled to the D-axis 21 via a connecting member 44, and the rear portion is coupled to a fixed member 46 via a swing member 45.
[0078]
The D-axis 21 is rotated by a servo motor M3, and the servo motor M3 is driven by a power source D3 (FIG. 5).
[0079]
Therefore, for example, in the case of a preparatory operation before mold replacement, the operator moves the D axis 21 through the mold replacement control means 4B (FIG. 2) to lower the bend beam 33 (step 201 in FIG. 6). After making the mold replacement work easy, the power source D3 of the servo motor M3, which is an actuator, is shut off (step 204 in FIG. 6).
[0080]
The operation of the present invention having the above configuration will be described below with reference to FIG.
[0081]
In FIG. 6, the left side shows the operation of the sequence control unit 4B1, and the right side shows the operation of the hard timer unit 4B2.
[0082]
(1) Preparation operation.
First, in step 101 of FIG. 6, the key switch 5A is set to “ON”, and then the key switch 5A is removed. In step 102, the push button switch 5B is pressed.
[0083]
That is, the operator sets the key switch 5A to “ON” (FIG. 2), removes it and carries it so that it cannot be used by a third party, and presses the push button switch 5B.
[0084]
As a result, the activation signal SK is output from the trigger unit 5C (FIG. 2), and the activation signal SK is input to the preparation control means 4B1A of the sequence control unit 4B1 connected to the trigger unit 5C via the key switch 5A. Then start this.
[0085]
Then, in step 201 of FIG. 6, the respective shafts are positioned at the mold replacement easy position, in step 202, the target mold is released, in step 203, the front table 48 is opened, and in step 204, the power supply Shut off.
[0086]
That is, the preparation control means 4B1A of the sequence control unit 4B1 activated by the operator operating the mold change switch 5 (FIG. 2) drives the Z axis 22 via the actuator control unit 4C (FIG. 1) to perform clamping. The beam 23 is raised, the Y axis 43 is driven to retract the manipulator 47, and the D axis 21 is driven to lower the bend beam 33, so that the operator can easily change the mold.
[0087]
In addition, the preparation control means 4B1A causes the center die 31B and the segment die 31C to escape outward by letting the actuator die 4B on both sides of the center die 31A (FIG. 7) through the actuator control unit 4C (FIG. 1). The mold 31A is easily exchanged, the front table 48 is opened, the work area R is secured (FIG. 4), and the worker H is brought close to the center mold 31A.
[0088]
Further, the preparation control means 4B1A sequentially transmits the shut-off signal S2 to the power supply circuit 3 (FIGS. 1 and 5), so that the first relay X1 (FIG. 5) of the power supply circuit 3 is sequentially controlled based on sequence control. The power supply D1, D2,... Is shut off while the control power supply 1 is in the activated state.
[0089]
On the other hand, the hard timer unit 4B2 (FIG. 2) is activated by the activation signal SK1 from the trigger unit 5D regardless of the push button switch 5B when the key switch 5A is turned “ON” in step 101 of FIG.
[0090]
In step 301 of FIG. 6, the time setting unit 4B2A (FIG. 2) of the hard timer unit 4B2 sets the time in the timer 4B2B of the next stage, and in step 302, the time set in the timer 4B2B has elapsed. (YES) In step 303, the timer contact 4B2C is opened (FIG. 2) and the emergency shut-off signal S3 is transmitted to the power supply circuit 3 (FIG. 5), and the second relay X2 of the power supply circuit 3 is opened, The power sources D1, D2,... Are shut off while the control power source 1 is in an activated state.
[0091]
That is, when the sequence control unit 4B1 cannot properly shut off the power sources D1, D2,... Due to failure or runaway, the hardware timer unit 4B2 can preferentially shut off the power sources D1, D2,. Thus, the safety of the worker H is ensured.
[0092]
(2) Mold replacement work.
[0093]
When the preparatory operation is completed as described above, the worker H (FIG. 4) enters the work area R secured by opening the front table 48 and manually changes the mold (in parentheses in FIG. 6). .
[0094]
In this case, since the work area R is secured, the worker H can approach the center mold 31A to be exchanged and can easily exchange the mold, and the control power supply 1 is activated. Since the power sources D1, D2,... Are cut off, the worker H can work safely.
[0095]
(3) Return operation.
[0096]
In step 103 of FIG. 6, the key switch 5A is turned off, and in step 104, the push button switch 5B is pressed.
[0097]
That is, the key switch 5A carried by the operator during the mold exchanging operation is taken out (FIG. 1), inserted into the control panel 6, and the key switch 5A is set to “OFF” (FIG. 2), and the push button switch 5B. Press.
[0098]
As a result, a trigger signal SK is output from the trigger unit 5C (FIG. 2), and the trigger signal SK is input to the return control means 4B1B of the sequence control unit 4B1 connected to the trigger unit 5C via the key switch 5A. Then start this.
[0099]
In step 205 of FIG. 6, the power supply is restored. In step 206, the front table 48 is closed. In step 207, the shafts and the dies are positioned at workable positions.
[0100]
That is, the return control means 4B1B of the sequence control unit 4B1 activated by the operator operating the mold change switch 5 (FIG. 2) transmits the return signal S5 to the power supply circuit 3 (FIGS. 1 and 5). Thus, the first relay X1 of the power source circuit 3 (FIG. 5) is sequentially closed based on the sequence control, and the power sources D1, D2,.
[0101]
However, when the sequence control unit 4B1 is abnormal and the hard timer unit 4B2 shuts off the power sources D1, D2,... When the power source is cut off in the preparatory operation (step 204 in FIG. 6) (step 303 in FIG. 6). ), The return control means 4B1B sequentially closes the second relay X2 based on the sequence control, and returns the power sources D1, D2,.
[0102]
The return control means 4B1B closes the front table 48 via the actuator control unit 4C (FIG. 1) and drives the Z-axis 22 to lower the clamp beam 23 to its original position or replace it. The workpieces W can be machined by returning the hollow die 31B and the segment die 31C on both sides of the rear center die 31A (FIG. 7) to the inside.
[0103]
Thereafter, the CPU 4A of the NC 4 (FIG. 1) controls the manipulator 47, the bend beam 33, and the like via the actuator control unit 4C, thereby bending the workpiece W clamped by the top die 31 and the bottom die 32. .
[0104]
【The invention's effect】
As described above, according to the present invention, in a bending apparatus for manually exchanging molds, it is possible to perform mold exchanging work easily and safely, and to quickly perform preparation work and return work before and after mold exchanging. The technical effect was achieved.
[0105]
[Brief description of the drawings]
FIG. 1 is an overall view showing an embodiment of the present invention.
FIG. 2 is a detailed view of a mold exchange control means 4B and a mold exchange switch 5 constituting the present invention.
FIG. 3 is a detailed view of a front table 48 constituting the present invention.
4 is a plan view of FIG. 3;
FIG. 5 is a diagram for explaining the operation of power supply interruption according to the present invention.
FIG. 6 is a flowchart for explaining the operation of the present invention.
FIG. 7 is an explanatory view of mold replacement according to the present invention.
[Explanation of symbols]
1 Control power supply
2 Busbar
3 Power supply circuit
4 NC
4A CPU
4B Mold change control means
4B1 sequence controller
4B2 hard timer section
4B1A preparation control means
4B1B Return control means
4C Actuator controller
5 Mold change switch
5A Key switch
5B push button switch
21 D axis
22 Z-axis
23 Clamp beam
30 Panel vendor
31 Top die
32 Bottom die
33 Bend Beam
35 Upper Turret
36 Lower turret
42 nuts
43 Y axis
48 Front table
47 Manipulator
61 Support table
49, 52, 53 Hinge
X1 1st relay
X2 Second relay
W Work

Claims (1)

In a bending machine that manually changes molds, drives an actuator such as a servo motor with a power source connected to a control power source, and performs a bending process on the work carried on the front table.
A mold change switch that can be operated by the operator,
A front table that can be freely opened and closed;
Operate the above die change switch to position each axis at the easy die change position, release the unapplicable die, open the front table, and shut off the power supply with the control power turned on. Control of preparatory operation before mold replacement and return operation after mold replacement by returning the power supply with the control power supply in the activated state, closing the front table, and positioning each axis and the mold at a workable position. A bending apparatus having a mold exchange control means for performing

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