JP3181413B2 - Interference prevention method and interference prevention control device for bender butting gauge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for preventing interference of a butting gauge device for a vendor.
More particularly, the present invention relates to an interference prevention method and an interference prevention control device for preventing interference between a butting gauge and a mold.

[0002]

2. Description of the Related Art A bender abutment gage device known as a back gage device for positioning a work material in a fixed size by a press brake or the like is moved by a servo mechanism or the like in a direction orthogonal to a bending line of the bender. It has an abutment gauge provided so as to be able to perform the fixed-size positioning of the processed plate material when the processed plate material is abutted against the abutting surface of the abutment gauge positioned at the fixed-size positioning position (length measurement position). Things.

In this butting gauge device, if the fixed-size positioning position is a position close to the mold, in other words, if the measuring distance is short, the butting gauge and the mold interfere with each other, and the May collide with the butting gauge and damage the butting gauge.

Conventionally, therefore, a limit position sensor, such as a limit switch fixedly arranged near the position of the mold, detects that the butting gauge has approached the mold by a predetermined value or more, and the limit position sensor has been activated. In this case, the machine is stopped for safety confirmation, and the bending process is not continued unless it is confirmed by the operator that the die does not collide with the butting gauge.

[0005]

The limit position sensor is fixedly disposed near the position where the mold is disposed. On the other hand, the limit approach position where the butting gauge does not collide with the mold is determined by the shape of the mold and the butting gauge. For this reason, depending on the type of the mold, the limit position sensor may operate even when the mold does not clearly collide with the butting gauge, and a troublesome check operation may have to be performed.

Further, depending on the thickness and bending angle of the processed plate material, even when the die collides with the abutment gauge at the time of completion of bending, the upper die (punch die) is applied to the processed plate material on the lower die (die die). When the die does not collide with the butting gauge at the time of clamping the work plate, where the abutment comes into contact, in this case, if the butting gauge is retracted at the time of clamping of the work plate, fixed positioning of the work plate by the butting gauge In spite of the fact that this can be performed, it has been conventionally considered that this is not considered at all, so that the fixed-size positioning of the processed plate material cannot be performed by the butting gauge.

The present invention has been made in view of the above-mentioned problems in the conventional butting device for vendors, and a mold is used for the butting gauge without any troublesome confirmation work. A bumping gauge for benders that reliably prevents collisions beforehand, expands the sizing range of the work plate that can be made with the bumping gauge, and allows the bumping gauge to be used as effectively as possible. It is an object of the present invention to provide a device interference prevention method and an interference prevention control device used for implementing the method.

[0008]

According to the present invention, the object as described above is provided by being provided so as to be movable in a direction perpendicular to the bending line of the bender, and by abutting the workpiece against the abutting surface. In the method of preventing the collision of the butting gage device for benders which prevents the butting gage which performs fixed size positioning of the work material from interfering with the mold, the dimension information of the mold and the dimension information of the butting gage First input of gauge fixed position information, thickness information of processed plate material and bending angle information
Step and a second step of determining calculation whether gauge impinges on die bending completion state butting located sizing positioning position based on these information, if not collide In this operation determination butting performed sizing positioning by gauge operation determines whether the gauge strikes the mold machining plate clamp state then butting located sizing positioning position based on the information in the case of a collision 3rd step
When, in this third case not collide at the operation determination step is processed plate material abutting the clamped state butting at a processing plate clamping state point by positioning the gauge sizing positioning position is retracted moving the gauge collide In this case, the fourth step of prohibiting the fixed-size positioning by the butting gauge is achieved by a method of preventing interference of the butting gauge apparatus for a vendor.

In order to achieve the above-mentioned object, an interference prevention device for a bender butting gauge device according to the present invention is provided so as to be movable in a direction orthogonal to a bending line of the bender, and is provided on a butting surface. In the interference prevention control device of the bender butting gauge device that prevents the butting gauge that performs fixed size positioning of the work material by being abutted against the mold, the mold dimensional information and An information input unit for inputting the dimensional information of the butting gauge, the sizing positioning position information of the butting gauge, the thickness information of the processed plate material and the bending angle information, and sizing positioning based on the information input from the information inputting unit A bending completion state interference calculation unit for determining whether or not the abutting gauge located at the position collides with the mold in the bending completed state; Constant based on which abutment the sizing positioning operation permission unit for permitting sizing positioning by gauge abutment by it is determined that the gauge does not collide with the mold bending completion state, information input from the information input unit Determines whether or not the abutment gauge located at the dimension positioning position collides with the mold in the clamped state of the processed plate material. and gauge abutting located position by positioning the sizing positioning position gauge butting up processing sheet clamped state by determined not to collide with the mold working plate clamped butt at a processing plate clamping state time A fixed-size positioning operation permitting unit with a retracting operation for permitting a fixed-size positioning operation with a retracting operation for retracting the gauge; When the collision calculation unit determines that the butting gauge located at the fixed size positioning position collides with the mold in the work plate material clamped state, it notifies that the fixed size positioning with the butting gauge is impossible. And a dimensional positioning impossible notification section.

[0010]

SUMMARY OF] According to such a structure described above, the abutting and dimensional information of the mold butting the size information of the gauge on the basis of the thickness information and the bending angle information processing sheet and sizing positioning positional information of the gauge, first constant It is determined whether or not the butting gauge located at the dimension positioning position collides with the mold in the bending completed state. If no collision is found in this calculation determination, sizing by the butting gauge is performed at the sizing positioning position. Positioning is allowed,
In the case of collision, it is next determined whether or not the abutment gauge located at the fixed size positioning position collides with the mold in the work plate material clamped state based on the information, and in this calculation determination, no collision occurs. In this case, the abutment gauge is positioned at the fixed size positioning position until the machined plate material is clamped, and the abutment gauge is retracted and moved when the machined plate material is clamped. It is forbidden.

[0011]

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

FIG. 1 shows an embodiment in which a bender abutment gauge device incorporating an interference prevention device according to the present invention is applied to a press brake as a back gauge device. The press brake has an upper apron 1 and a lower apron 3. In this embodiment, the upper apron 1 is a movable apron that is driven up and down by a driving device (not shown), and the lower apron 3 is It is a fixed apron.

A punch die 7 having a V-shaped tip 5 is fixedly mounted on the upper apron 1 by a fastener (not shown), and a die die 1 having a V-shaped groove 9 is mounted on the lower apron 3.
1 is fixedly mounted by a fastener (not shown).

A back gauge device 13 is provided behind the upper apron 1 and the lower apron 3. The back gauge device 13 is screwed to the ball screw shaft 15 extending in a direction perpendicular to the bending line, that is, in the left-right direction in FIG. 1, and bent by rotation of the ball screw shaft 15. The ball nut member 17 and the ball nut member 17 that move in a direction perpendicular to the processing line, that is, in the left-right direction in FIG.
Rail member 19 fixed to the support rail member 19
Engaging the mounted and a gauge support member 21, a back gauge (abutment gauge) 23 is fixedly attached to the gauge support member 21.

The back gauge 23 has an abutting surface 25 at its tip.
When the processed plate material W is abutted against the abutting surface 25, the fixed size positioning of the processed plate material W is performed.

The ball screw shaft 15 is drivingly connected to a servomotor 29 by a coupling 27,
The ball nut member 17 is rotated by 9, the support rail member 19 to move the back gauge 23 to any mobile position in the direction orthogonal to the folding processing line with gauge support member 21.

The servo operation of the servo motor 29 is controlled by a servo drive circuit 33 to which an operation amount signal is given from an NC unit 31.

The NC device 33 is of a computer type, and has a built-in interference prevention control device with a software configuration.

As shown in FIG. 2, the interference prevention control device includes an information input unit 35 and a bending completion state interference calculation unit 3
7, a sizing positioning operation permission unit 39, a work plate material clamping state interference calculation unit 41, a sizing positioning operation permission unit 43 with a retracting operation, and a sizing positioning impossible notification unit 45.

The information input unit 35 is provided with an operation panel 47 (see FIG. 1), a machining program, and the like, and dimensional information of the punch die 7 and the die die 11, dimensional information of the back gauge 23, and fixed-size positioning of the back gauge 23. The position information, the thickness information of the processed plate material, and the bending angle information are input.

The bending completion state interference calculation unit 37 calculates a critical approaching position at which the back gauge 23 does not collide with the punching die 7 in the bending completed state based on the information input by the information input unit 35, and calculates the critical approaching position. By comparing the back gauge 23 with the fixed positioning position of the back gauge 23, it is determined whether or not the back gauge 23 located at the fixed positioning position collides with the punch 7 in the bending completed state.

The sizing positioning operation permission unit 39 determines that the back-gauge 23 located at the sizing positioning position does not collide with the punch die 7 in the bending completed state by the bending completion state interference calculation unit 37. The normal fixed-size positioning operation by the back gauge 23 is permitted.

Thus, in this case, the back gauge 2
Reference numeral 3 denotes a stationary position at the fixed-size positioning position during and after bending.

Interference calculating section 41 when the work plate is clamped
Calculates the critical approach position at which the back gauge 23 does not collide with the punching die 7 in the clamped state of the work plate based on the information input by the information input unit 35, and calculates the critical approach position and the fixed-size positioning position of the back gauge 23. By the comparison calculation, it is determined whether or not the back gauge 23 located at the fixed size positioning position collides with the punching die 7 in the work plate material clamped state.

Fixed size positioning operation permitting unit 43 with retract operation
When the back gauge 23 located at the fixed size positioning position is determined not to collide with the punching die 7 in the clamped state by the work plate material clamp state interference calculation unit 41, the back gauge 23 is operated until the work plate material is clamped. It is positioned at the fixed size positioning position, and permits a fixed size positioning operation with a retracting operation of retracting and moving the back gauge 23 at the time of the work plate material clamping state.

Thus, in this case, the back gauge 2
Numeral 3 is positioned at the fixed size positioning position until the work plate material is clamped, and retreats to avoid interference with the punching die 7 at the time of the work plate material clamp state.

The sizing positioning impossible notification unit 45 determines that the back gauge 23 located at the sizing positioning position collides with the punching die 7 in the working plate material clamping state by the work plate material clamping state interference calculating unit 41. Thus, it is notified that the fixed size positioning by the back gauge 23 is impossible.

Thus, in this case, the display provided on the operation panel 47, a warning light, and the like indicate that the fixed size positioning by the back gauge 23 is impossible.

FIG. 3 shows an example of a flow of a determination calculation process for preventing interference between the back gauge 23 and the punching die 7 by the NC device 33 executing the program.

In this determination operation processing flow, first, various dimension information of the punch die 7 and the die 11, height dimension information of the back gauge 23, fixed dimension positioning position information of the back gauge 23, and the work plate W Is input (step 100).

It is to be noted that, for each piece of information, information necessary for each of the following operations may be input each time each operation is performed.

After inputting the necessary information, an interference dimension X indicating a limit approach position at which the back gauge 23 does not collide with the punch die 7 is calculated according to the following equation (step 110).

X = A · sin (θ / 2) As shown in FIG. 4, A is the tip blade width dimension of the punch die 7, θ is the tip angle of the punch die 7, and the interference dimension. X indicates the maximum deviation distance of the side of the punch die 7 on the back gauge 23 side with respect to the bending center.

It should be noted that in FIG. 4 and the following FIGS.
Is a deviation distance of the front end surface (abutting surface 25) of the back gauge 23 located at a predetermined sizing positioning position with respect to the bending center, that is, a length measuring distance for sizing positioning.

Next, it is determined whether the length measurement distance L of the back gauge 23, that is, the deviation distance L of the tip surface of the back gauge 23 from the center of bending is larger than the interference dimension X (step 120). When the deviation distance L> interference dimension X,
The back gauge 23 located at the fixed size positioning position does not collide with the punch die 7, and in this case, the normal fixed size positioning operation by the back gauge 23 is permitted (Step 130).

Thus, in this case, the back gauge 2
Reference numeral 3 denotes a stationary position at the fixed-size positioning position during and after bending.

On the other hand, if the deviation distance L ≦ interference dimension X, the back gauge 23 located at the fixed size positioning position
May collide with the punching die 7. In this case, furthermore, the limit approach position at which the back gauge 23 does not collide with the punching die 7 at the bending completion position as shown in FIG. The interference dimension Y at the completion of bending shown is calculated according to the following equation (step 140).

Y = (B + H) ・ tan (θ / 2) H = (V / 2) ・ tan (K / 2) -T

## EQU1 ## Y = ｛B + (V / 2) · tan (K / 2) −
T｝ tan (θ / 2) As shown in FIG. 5, B is the height of the back gauge 23, and H is the distance from the upper surface of the die 11 to the tip of the punch at the completion of bending. Where V is the maximum groove width dimension of the die 11, K is the bending angle, and T is the thickness of the processed plate material. In this case, the interference dimension Y at the time of completion of bending indicates a deviation distance of the leading end surface of the back gauge 23 from the center of bending when the back gauge 23 is in contact with the punch die 7 at the bending completion position.

Next, it is determined whether or not the measured length L of the back gauge 23 is larger than the interference dimension Y at the time of completion of bending (step 150). When the deviation distance L> the interference dimension Y at the time of completion of bending, the back gauge 23 located at the fixed size positioning position overlaps below the punching die 7, but the punch gauge at which the back gauge 23 is located at the bending completion position. There is no collision with the mold 7, and in this case, the normal fixed-size positioning operation by the back gauge 23 is permitted (step 13).
0).

Thus, also in this case, the back gauge 23
Is located at the fixed position for positioning during the bending process and at rest.

On the other hand, when the deviation distance L ≦ the interference dimension Y at the time of completion of bending, the back gauge 23 located at the fixed size positioning position may collide with the punching die 7 located at the position of completion of bending. In this case, the clamp interference dimension Z indicating the limit approach position at which the back gauge 23 does not collide with the punching die 7 at the work plate material clamping position as shown in FIG. 6 is calculated according to the following equation. (Step 160).

Z = (BT) · tan (θ / 2) Next, it is determined whether or not the measured length L of the back gauge 23 is larger than the interference dimension Z during clamping (step 17).
0). When the deviation distance L> the interference dimension Z at the time of clamping, the back gauge 23 and the punch die 7 interfere at the completion of bending, but the back gauge 23 does not collide with the punch die 7 at the clamp position. In this case, the back gauge 23 is positioned at the fixed-size positioning position until the work plate material is clamped, and a fixed-size positioning operation with a retreat operation for retracting the back gauge 23 at the time of the work plate material clamp state is permitted (step 180). ).

Thus, in this case, the back gauge 2
Reference numeral 3 denotes a position at the fixed size positioning position until the punching die 7 descends to the work plate clamp position, and the punch die 7 retreats in a state where the lowering of the punch die 7 is temporarily stopped at the work plate clamp position. Therefore, in this case as well, although the descent of the punch die 7 is temporarily stopped during the bending, the positioning of the work plate W by the back gauge 23 is performed without any trouble.

On the other hand, in the case where the deviation distance L ≦ the interference dimension Z at the time of clamping, the back gauge 23 collides with the punching die 7 when the punching die 7 drops to the work plate material clamping position. In this case, it is notified that the fixed size positioning by the back gauge 23 is impossible (step 190).

Thus, in this case, a display, a warning light, and the like provided on the operation panel 47 indicate that the fixed size positioning by the back gauge 23 is impossible, and this is notified to the operator. .

Although the present invention has been described in detail with reference to specific embodiments, the present invention is not limited to these embodiments, and various embodiments can be made within the scope of the present invention. Some will be apparent to those skilled in the art.

[0047]

As can be understood from the above description, according to the method and apparatus for preventing interference of a butting gauge device for a bender according to the present invention, the dimensional information of the die, the dimensional information of the butting gauge, and the Based on the sizing positioning position information of the butt gauge (back gauge), the thickness information of the processed plate material, and the bending angle information , first, whether or not the butt gauge located at the sizing positioning position collides with the mold in the bending completed state. If no collision is found in this calculation, sizing positioning by the abutment gauge is permitted at the sizing position, and if colliding, the sizing position is determined based on the information. whether gauge strikes the mold machining plate clamped butt has is then arithmetic determination, gate and when not collide in this operation determination abutment to the machining plate clamped state The abutment gauge is moved to the retracted position when the work plate is clamped, and the abutment gauge is used only when the abutment gauge collides with the mold in the work plate clamped state. Because sizing positioning is prohibited, it is possible to reliably prevent the die from colliding with the butting gauge without any troublesome checking work. The range is increased and the butting gauge can be used as efficiently as possible.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment in which a bender abutment gauge device incorporating an interference prevention device according to the present invention is applied to a press brake as a back gauge device.

FIG. 2 is a block diagram showing an embodiment of an interference prevention control device for a bender butting gauge device according to the present invention.

FIG. 3 is a flowchart illustrating an example of an interference prevention determination calculation processing flow in an interference prevention control device of the bender butting gauge device according to the present invention.

FIG. 4 is an explanatory diagram showing a relationship between a mold and a back gauge.

FIG. 5 is an explanatory diagram showing a relationship between a mold and a back gauge in a bending completed state.

FIG. 6 is an explanatory diagram showing a relationship between a mold and a back gauge in a work plate material clamp state.

[Explanation of symbols]

 7 Punching die 11 Die die 13 Back gauge device 15 Ball screw shaft 23 Back gauge (butting gauge) 29 Servo motor 31 NC device 35 Information input unit 37 Interference calculation unit at bending completion state 39 Fixed size positioning operation permission unit 41 Workpiece plate clamp state interference calculation unit 43 Fixed size positioning operation permission unit with retreat operation 45 Fixed size positioning disabled notification unit

Claims (2)

(57) [Claims] An abutment gauge, which is provided so as to be movable in a direction orthogonal to a bending line of a bender and performs fixed-size positioning of a workpiece by abutting the workpiece against an abutting surface, interferes with a mold. In the method of preventing interference of the butting gage device for benders, the dimension information of the die, the size information of the butting gauge, the fixed positioning position information of the butting gauge, the thickness information of the processed plate material and the bending a first step of inputting the angle information, a second step of determining calculation whether gauge impinges on die bending completion state butting located sizing positioning position based on these information, the operation If the collision does not occur in the determination, a sizing positioning operation is performed by the abutment gauge. If the collision occurs , the abutment gauge located at the sizing positioning position is then determined based on the information described above. To the mold in the state Third step and, the third step if no collision at the operation determination by the position gauge butting up processing sheet material clamped in sizing the positioning position processing plate clamping state of the operation determines whether or not a collision butt at time retracts moving the gauge, the fourth step and the interference preventing method of the gauge apparatus butting for vendors and having a prohibiting sizing positioning by gauge abutment when colliding. 2. A striking gauge, which is provided so as to be movable in a direction orthogonal to a bending line of a bender and performs fixed positioning of the workpiece by abutting the workpiece against an abutting surface, interferes with a mold. In the anti-interference control device of the butting gage device for benders, the die size information, the butting gauge size information, the butting gauge fixed size positioning position information, and the work plate material thickness information An information input unit (35) for inputting bending angle information, and whether a butting gauge located at a fixed size positioning position collides with a mold in a bending completed state based on the information input from the information input unit (35) . The collision calculating unit (37) in the bending completion state, which determines whether or not to perform calculation, and the butting gauge located at the fixed size positioning position does not collide with the mold in the bending completion state by the bending calculation unit (37). Determined Fixed-size positioning operation permission section that permits fixed-size positioning operation using the butting gauge
(39) a processed plate material clamp which determines whether or not the abutment gauge located at the fixed size positioning position collides with the mold in the processed plate material clamp state based on the information input from the information input unit (35); state when the interference calculation section (41), the gauge abutment located sizing positioning position by the machining plate clamped state when the interference calculation section (41) is processed plate material click
It is determined that it does not collide with the mold in the ramp state, so that the abutment gauge is positioned at the fixed positioning position until the workpiece plate clamp state, and the abutment gauge is retracted and moved at the time of the workpiece plate clamp state. Fixed-size positioning operation permission unit with retraction operation that permits positioning operation (4
3) and sizing positioning by the butting gauge when the interference calculating unit (41) in the working plate material clamping state determines that the butting gauge located at the sizing positioning position collides with the mold in the working plate material clamping state. And a notifying unit (45) for notifying a fixed-size positioning notifying unit that notifies that the positioning is impossible.