JP2003211224A - Bending device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten set-up time and to improve the efficiency of working by quickly performing the positioning of a work in the case of inclined bending. <P>SOLUTION: In a bending device for performing a prescribed bending work to the work W by striking the work W against end gauges 1 of a back gauge, freely rotatable side stoppers 2 are provided on the end gauges 1. The positions Y<SB>1</SB>, Y<SB>2</SB>in the back-and-forth directions of the end gauges 1 are calculated so that the end gauges 1 are inclined at a prescribed inclined angle θ<SB>0</SB>by a means 30C for calculating the position of the end gauge on the basis of the shape of the work W detected by a work shape detecting means 30B and also the turning angle θ of the side stopper 2 to the end gauge surface W1 of the work W is calculated by a means 30D for calculating the turning angle of the side stopper. The end gauges 1 are moved to the calculated positions in the back-and- forth direction by a back gauge driving and controlling means 30G and the side stoppers 2 are turned by the calculated turning angle θ. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus, and more particularly to a bending apparatus having a side stopper interlocking with an NC device provided at a bump.

[0002]

2. Description of the Related Art Conventionally, for example, in a bending apparatus such as a press brake, a work W (see FIG.
0 (A)) Abutting on the abutment 50 of the back gauge, positioning is performed.

In this case, if the abutting surface W1 of the work W (FIG. 10 (B)) and the bending line m are normal bends, the work W is relatively easily positioned in the lateral direction (X-axis direction). Thus, when the work W is positioned, the tip of the predetermined punch P is arranged above the bending line m (FIG. 10A).

[0004]

However, in the case of inclined bending in which the abutting surface W1 of the work W (FIG. 11) and the bending line m are not parallel, it is generally difficult to hit the work W in the lateral direction. There are many things.

As a result, the tip of the predetermined punch P is not arranged above the bending line m, and processing cannot be performed.

Even in the case of such inclined bending, a special jig dedicated to lateral positioning must be prepared and attached when accurate positioning is desired.

Therefore, it is obvious that the preparation of the jig and the attachment of the jig take a lot of time before the machining and the machining efficiency is lowered.

An object of the present invention is to speed up positioning of a work in the case of tilted bending, thereby shortening setup time and improving working efficiency.

[0009]

In order to solve the above problems, according to the present invention, as shown in FIG. 1, a work W is abutted against an abutment 1 of a back gauge, and the work W is bent in a predetermined manner. In the bending apparatus for applying, a rotatable side stopper 2 provided on the abutment 1, a work shape detecting means 30B for detecting the shape of the work W based on product information input in advance, and the detected work. An abutment position calculating means 30C for calculating the positions Y ₁ and Y ₂ of the abutment 1 in the front-rear direction based on the shape of W so that the abutment 1 is inclined at a predetermined inclination angle θ ₀ , and the calculated position. Front and back position Y ₁ , Y
_The side stopper 2 against the abutting surface W1 of the work W when the work W is abutted against the abutment 1 positioned at 2
Of the side stopper turning angle calculating means 30D for calculating the turning angle θ of the above, and the abutment 1 is moved to the calculated position in the front-rear direction, and the side stopper 2 is turned by the calculated turning angle θ. A technical means called a bending apparatus is provided, which has a back gauge drive control means 30G for driving and controlling the actuator My for moving in the front-back direction and the actuator M (or 34) for turning the side stopper.

Therefore, according to the configuration of the present invention, the side stopper 2 is rotatably provided on the side surface of the abutment 1 so that the CAD information as the product information (FIG. 1) is transferred from the upper NC device 40 to the lower NC device. Input 30 (Step 1 in FIG. 9)
01), the shape of the work W is detected based on the inputted CAD information (step 102 in FIG. 9), and based on the detection result, the abutment 1 is projected so as to be inclined at a predetermined inclination angle θ _0. When the position of the abutment 1 in the front-rear direction is calculated (step 103 in FIG. 9) and the turning angle θ of the side stopper 2 is calculated (step 104 in FIG. 9), the abutment 1 is moved in the calculated front-rear direction position. By moving to Y ₁ and Y ₂ , the side stopper 2 can be rotated by the calculated rotation angle θ (step 105 in FIG. 9).

Thus, according to the present invention, the NC device 4
By providing the side stopper 2 interlocking with 0 and 30 on the abutment 1, it is possible to shorten the setup time and improve the machining efficiency by quickly positioning the work W in the case of inclined bending. Become.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the accompanying drawings by way of embodiments. FIG. 1 is an overall view showing an embodiment of the present invention.

The bending apparatus shown in FIG. 1 is, for example, a press brake (FIG. 8), and a back gauge is installed at a rear portion of the press brake, and the back gauge has an abutment 1.

As is well known, the abutment 1 is a member for abutting the work W before processing and positioning it at a predetermined position, and is slidably coupled to the stretch 4 extending in the longitudinal direction (X-axis direction). is doing.

The abutment 1 (FIG. 1) is provided with a side stopper 2, which holds the workpiece W when the abutting surface W1 of the workpiece W and the bending line m are not parallel to each other. It is a member that abuts and positions in the lateral direction (X-axis direction).

FIG. 2 is a view showing a first embodiment of the side stopper 2.

In FIG. 2, the side stopper 2 is mounted on the outer surface of the turning shaft 7 arranged in the up-down direction (Z-axis direction), and the upper and lower surfaces of the turning shaft 7 have support shafts 7A,
7B is attached.

Of the supporting shafts 7A (FIG. 2 (B)) and 7B, the upper supporting shaft 7A is mounted on the bearing 8 and the lower supporting shaft 7A.
B is rotatably supported by a bearing 9, and the bearings 8 and 9 are attached to the side surface of the abutment 1.

As a result, the side stopper 2 is attached to the abutment 1
It is installed on the side of the machine so that it can rotate freely.

The side stopper 2 (see FIG.
(A)) A motor M (for example, a servomotor) is provided in a vertical direction on a side surface of the abutment 1 adjacent to the turning shaft 7 via a bracket 24, as shown in the drawing.

The drive shaft 1 is attached to the rotary shaft 25 of the motor M.
1 is attached to the drive pulley 11 and the rotating shaft 7
The driven pulley 10 attached to the lower support shaft 7B of
The belt 12 is wound.

With this configuration, the lower NC device 3 described later
0 (FIG. 1) back gauge drive control means 30G
However, if the motor M is drive-controlled, the rotational power of the motor M is transmitted to the swivel shaft 7 via the drive pulley 11, the belt 12 (FIG. 2) and the driven pulley 10, and the side stopper 2
Turns by a predetermined turning angle θ.

FIG. 3 is a view showing a second embodiment (FIG. 3 (A)) and a third embodiment (FIG. 3 (B)) of the side stopper 2.

In FIG. 3A, a spur gear 26 is attached to the rotary shaft 25 of the motor M, and the spur gear 2 meshes with the spur gear 26.
7 is attached to the lower support shaft 7B of the turning shaft 7.

With this configuration, similarly, the lower NC device 3
0 (FIG. 1) back gauge drive control means 30G
However, when the motor M is drive-controlled, the rotational power of the motor M is transmitted to the swivel shaft 7 via the spur gear mechanisms 26 and 27 (FIG. 3 (A)), and the side stopper 2 has a predetermined swivel angle. Turn by θ.

FIG. 3B shows the motor M as shown.
Is attached in the horizontal direction, a worm gear 28 is provided at the tip of the rotary shaft 25 of the motor M, and a worm wheel 29 meshing with the worm gear 28 is attached to the lower support shaft 7 of the turning shaft 7.
It is attached to B.

With this configuration, similarly, the lower NC device 3
0 (FIG. 1) back gauge drive control means 30G
However, if the motor M is driven and controlled, the rotational power of the motor M is transmitted to the swivel shaft 7 via the worm gear 28 and the worm wheel 29 (FIG. 3 (B)), and the side stopper 2 is rotated at a predetermined swivel angle. Turn by θ.

FIG. 4 is a view showing a fourth embodiment of the side stopper 2.

In FIG. 4, a cylinder 34 (for example, a hydraulic cylinder) is horizontally provided on a side surface of the abutment 1 adjacent to the pivot 7 of the side stopper 2 via a bracket 33 as shown in the drawing. It is provided.

One end of the connecting rod 17 is attached to the piston 19 of the cylinder 34 via the pin 32, and the other end of the connecting rod 17 is attached to the clamp arm 1 via the pin 18.
It is attached to 6.

Having the shaft 15 of the clamp arm 16,
The upper portion of the crankshaft 15 is rotatably supported by a bearing 39, and the central portion of the crankshaft 15 is rotatably supported by a bearing 31. The bearings 39, 31 are attached to the side surface of the abutment 1.

Further, a spur gear 14 is attached to the lower portion of the crankshaft 15, and a spur gear 13 meshing with the spur gear 14 is attached to the lower support shaft 7B of the turning shaft 7 of the side stopper 2. .

With this configuration, when the back gauge drive control means 30G constituting the lower NC device 30 (FIG. 1) drive-controls the cylinder 34 (FIG. 4), the reciprocating power of the cylinder 34 is the same as that of the connecting rod 17. It is converted into rotational power through the clamp mechanisms 16 and 15, and the rotational power is converted into the spur gear mechanism 1.
It is transmitted to the swivel shaft 7 via 4 and 13, and the side stopper 2 swivels by a predetermined swivel angle θ.

Further, FIG. 5 is a view showing a fifth embodiment of the side stopper 2.

In FIG. 5, a cylinder 34 (for example, a hydraulic cylinder) is provided on the side surface of the abutment 1 adjacent to the pivot 7 of the side stopper 2 via a bracket 33 as shown in FIG. On the lower side, it is provided facing the horizontal direction.

One end of a connecting rod 38 is attached to the piston 19 of the cylinder 34 via a pin 32, and the other end of the connecting rod 38 is attached to a planetary gear 36 via a pin 37. Sun gear 35 meshing with 36
Is attached to the lower support shaft 7B of the turning shaft 7 of the side stopper 2.

With this configuration, when the back gauge drive control means 30G constituting the lower NC device 30 (FIG. 1) drive-controls the cylinder 34 (FIG. 5), the reciprocating power of the cylinder 34 is reciprocating power of the connecting rod 38 and the connecting rod 38. Planet gear 3 that rotates and revolves
6 is converted into rotational power via 6, and the rotational power is transmitted to the orbiting shaft 7 via the sun gear 35, and the side stopper 2
Turns by a predetermined turning angle θ.

FIG. 8 is a diagram showing a specific example of the bending apparatus according to the present invention. In FIG. 8, the side stopper turning actuator M or 34 described in detail with reference to FIGS. 2 to 5, the driving pulley 11, the driven pulley 10, and the belt 12 are shown.
The power transmission mechanism including the above is omitted for simplification of the drawing.

The bending apparatus shown in FIG. 8 is, for example, a press brake as described above. The press brake has a punch P mounted on the upper table 20 via a punch holder 22, and a die holder 23 on the lower table 21. With the die D mounted via the punch P and the die D in cooperation with each other, the work W is subjected to a predetermined bending process (FIG. 1).

As shown in the drawing, a back gauge is provided at the rear of the press brake having the above structure.

As is well known, this back gauge has supporters 6 on both sides extending in the front-rear direction (Y-axis direction) from the lower table 21, and the supporters 6 are rotationally driven by a Y-axis motor My. Built-in ball screw 39
A post 5 extending in the vertical direction (Z-axis direction) is screwed into each ball screw 39.

A ball screw 40, which is driven to rotate by a Z-axis motor Mz, is built in the post 5, and each ball screw 40
A stretch 4 that extends in the left-right direction (X-axis direction) is screwed into.

On the stretch 4, the main body 3 having the abutment 1 provided with the above-mentioned side stopper 2 is attached.

The abutting body 3 is moved in the left-right direction (X-axis direction) on the stretch 4 by a pinion (not shown) that is rotationally driven by an X-axis motor Mx, and a rack that meshes with the pinion and is attached to the stretch 4. To move to.

With this configuration, the back gauge drive control means 30G which constitutes the lower NC device 30 (FIG. 1),
The X-axis motor Mx, the Y-axis motor My, and the Z-axis motor M
z and the side stopper turning actuator M (or 34) described above are drive-controlled (FIGS. 2 to 5), the abutment 1 is positioned at a predetermined position and the side stopper 2 is moved.
Can be turned by a predetermined turning angle θ.

As shown in FIG. 1, the control device of the bending apparatus having the above-mentioned configuration is composed of the lower NC device 30.

The lower NC device 30 includes a CPU 30A, a work shape detecting means 30B, and an abutting position calculating means 30C.
The side stopper turning angle calculation means 30D, the input / output means 30E, the storage means 30F, and the back gauge drive control means 30G.

The CPU 30A follows the operation procedure of the present invention (corresponding to, for example, FIG. 9), the work shape detecting means 30B,
The entire apparatus shown in FIG. 1, such as the abutting position calculating means 30C, is centrally controlled.

The work shape detecting means 30B detects the shape of the work W to be machined from now on the basis of, for example, CAD information input from the upper NC device 40 via the input / output means 30E (FIG. 6).

At this time, the work shape detecting means 30
At the same time, the mold, the mold layout (mold station), the D value, and the like used for each bending order of the work W are determined by B.

The abutting position calculating means 30C abuts the work W, for example, when the work W is tilted and bent (FIG. 1) based on the detection result of the work W shape by the work shape detecting means 30B. This is the predetermined tilt angle θ
Positions Y ₁ and Y ₂ in the front-rear direction (Y-axis direction) of the abutment 1 are calculated so as to incline at ₀ .

For example, when it is detected that the angle between the abutting surface W1 of the work W and the bending line m is θ ₀ based on the detected shape of the work W, the abutting 1 on both sides is detected.
Must be tilted by this angle θ ₀ .

Therefore, the abutment position calculating means 30C calculates the positions Y ₁ and Y ₂ in the front-rear direction of both abutments 1 so that the abutment 1 is inclined at the inclination angle θ ₀ .

Further, the abutment position calculating means 30C also calculates the positions of the abutment 1 in the left-right direction (X-axis direction) and the up-down direction (Z-axis direction) when the work W is inclined and bent.

Side stopper turning angle calculating means 30D
Is a side stopper 2 for the abutting surface W1 of the work W when the work W is abutted against the abutment 1 positioned at the front-back positions Y ₁ and Y ₂ calculated by the abutting position calculating means 30C. The turning angle θ of is calculated.

For example, in the case of FIG. 1, since the abutting surface W1 of the work W is abutted against the abutting 1 and the left end surface W2 of the work W is abutted against the left side stopper 2, the abutting surface W1 The turning angle θ of the side stopper 2 is calculated based on the angle θ with the left end surface W2.

In this case, the turning angle θ of the side stopper 2
Is, for example, as shown in FIG.
There are various cases.

FIG. 6A shows a case where the abutting surface W1 of the work W is abutted against the abutment 1 and the left end surface W2 of the work W is abutted against the left side stopper 2, and the side stopper 2 is rotated. The angle θ = 90 °.

In this case, the left and right side stoppers 2
Are closed (FIG. 7).

FIG. 6B shows a case where the abutting surface W1 of the work W is abutted against the abutment 1 and the left end surface W2 of the work W is abutted against the left side stopper 2, and the side stopper 2 is rotated. The angle θ> 90 °.

In this case, the left side stopper 2 is open, but the right side stopper 2 is closed (FIG. 7).

FIG. 6C shows a case where the abutting surface W1 of the work W is abutted against the abutment 1 and the right end surface W3 of the work W is abutted against the right side stopper 2, and the side stopper 2 is rotated. The angle θ = 90 °.

In this case, as in the case of FIG. 6A, the left and right side stoppers 2 are both closed (FIG. 7).

FIG. 6D shows a case where the abutting surface W1 of the work W is abutted against the abutment 1 and the right end surface W3 of the work W is abutted against the right side stopper 2 and the side stopper 2 is rotated. The angle θ> 90 °.

In this case, the left side stopper 2 is closed, but the right side stopper 2 is open (FIG. 7).

As described above, the side stopper turning angle calculating means 30D considers the die layout at that time on the basis of the shape of the work W detected by the work shape detecting means 30B to determine whether the side stopper turning angle is right or left. It is determined whether the left end surface W2 or the right end surface W3 of the work W is abutted against the side stopper 2, and the abutting surface W1 and the left end surface W of the work W are determined.
2 or the angle formed with the right end surface W3, the predetermined turning angle θ
To calculate.

The input / output means 30E has an interface function between the upper NC device 40 and the lower NC device 30, inputs CAD information from the upper NC device 40, and the inputted CAD information is stored in a later-described storage. It is stored in the means 30F.

Further, the input / output unit 30E inputs a machining program which is an operation procedure for carrying out the present invention, and the input operation can be confirmed on the screen.

The storage means 30F stores the above-mentioned CAD information, a machining program and the like.

The back gauge drive control means 30G moves the abutment 1 to the position in the front-rear direction calculated by the abutment position calculation means 30C, and calculates the side stopper 2 by the side stopper turning angle calculation means 30D. The Y-axis motor My and, for example, the side stopper turning motor M are drive-controlled so as to turn by the given turning angle θ.

Further, back gauge drive control means 30G
Drives and controls the X-axis motor Mx and the Z-axis motor Mz so as to move the abutment 1 to predetermined positions in the horizontal direction and the vertical direction.

The operation of the present invention having the above configuration will be described below.
This will be described with reference to FIG.

(1) Operation until the turning angle θ of the side stopper 2 is calculated. First, in step 101 of FIG. 9, CAD information is input, in step 102 the shape of the work W is detected, in step 103, the position of the abutment 1 in the front-back direction is calculated, and in step 104, the side stopper 2 The turning angle θ of is calculated.

That is, the CPU constituting the lower NC device 30
30A (FIG. 1) is from the upper NC device 40 to the input / output means 3
When the CAD information is input via 0E, the CAD information is stored in the storage unit 30F.

In this state, the CPU 30A controls the work shape detecting means 30B to detect the shape of the work W to be machined based on the CAD information stored in the storage means 30F.

At this time, the CPU 30A also causes the work shape detecting means 30B to determine a mold, a mold layout, a D value, etc. for each bending order of the work W.

As a result, for example, the shape of the work W as shown in FIG. 1 is detected, and as a result of taking into consideration the die layout and the like, when the work W is positioned, its abutting surface W1
To the abutment 1 and the left end face W2 to the left side stopper 2, and the angle between the abutment face W1 and the bending line m is θ ₀ ,
It is assumed that the angle formed by the abutting surface W1 and the left end surface W2 is θ.

Based on the data, this time, the CPU 3
0A controls the collision position calculation means 30C, and the collision 1 is up.
Note angle θ₀The position of each abutment 1 in the front-rear direction
Table Y ₁, Y₂And calculate side stopper turning
Turning the side stopper 2 by controlling the angle calculation means 30D
The angle θ is calculated.

Further, at this time, the CPU 30A simultaneously
The abutting position calculating means 30C is controlled to calculate the position of each abutting 1 in the X-axis direction and the Z-axis direction.

(2) Movement of the abutment 1 and the side stopper 2
Turning motion.

When the calculation of the longitudinal positions Y ₁ and Y _{2 of the} abutment ₁ (step 103 in FIG. 9) and the turning angle θ of the side stopper 2 is completed, the CPU 30A controls the back gauge drive control means 30G. It controls and moves the abutment 1 and turns the side stopper 2 (step 1 in FIG. 9).
05).

In this case, the back gauge drive control means 30G which has received the instruction from the CPU 30A operates the X-axis motor Mx.
The Y-axis motor My and the Z-axis motor Mz are drive-controlled to position the abutment 1 at a predetermined position.

The back gauge drive control means 30G
Drives the motor M (FIG. 2) and transmits its rotational power to the swivel shaft 7 via the drive pulley 11, the belt 12, and the driven pulley 10, thereby causing the side stopper 2 to move by the swivel angle θ. Turn.

(3) Bending operation.

As described above, when the abutment 1 and the side stopper 2 are positioned at predetermined positions, the operator can
After the abutting surface W1 of the work W is abutted against the abutting surface 1 and the left end surface W2 is abutted against the left side stopper 2 (step 106 in FIG. 9), if a foot pedal (not shown) is depressed,
For example, the upper table 20 is lowered (FIG. 8), and the work P is subjected to a predetermined inclined bending process by the cooperation of the punch P and the die D (step 107 in FIG. 9).

Then, in step 108, it is judged whether or not the machining is completed, and if it is not completed, (N
O), returning to step 105, the same operation is repeated for the next bending order of the same work W, and when completed (YES), all operations are stopped (END).

[0087]

As described above, according to the present invention, since the side stopper interlocking with the NC device is provided at the abutment, the workpiece W can be quickly positioned in the case of tilted bending, so that the setup time can be improved. This has the technical effect of shortening the machining time and improving the processing efficiency.

[0088]

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a first embodiment of a side stopper 2 which constitutes the present invention.

FIG. 3 is a diagram showing a second embodiment and a third embodiment of a side stopper 2 which constitutes the present invention.

FIG. 4 is a view showing a fourth embodiment of a side stopper 2 which constitutes the present invention.

FIG. 5 is a diagram showing a fifth embodiment of a side stopper 2 which constitutes the present invention.

FIG. 6 is a view showing a turning mode of a side stopper 2 which constitutes the present invention.

FIG. 7 is a diagram showing the state of FIG. 6;

FIG. 8 is a diagram showing a specific example of the present invention.

FIG. 9 is a flow chart for explaining the operation of the present invention.

FIG. 10 is an explanatory diagram of a case of normal bending.

FIG. 11 is an explanatory diagram in the case of inclined bending.

[Explanation of symbols]

1 Impact 2 Side Stopper 3 Main Body 4 Stretch 5 Post 6 Supporter 7 Revolving Shaft 7A, 7B Support Shaft 8, 9, 31, 39 Bearing 10 Driven Pulley 11 Drive Pulley 12 Belt 13, 14, 26, 27 Spur Gear 15 Crankshaft 16 Clamp Arm 17, 38 Connecting Rod 18, 32, 37 Pin 19 Piston 20 Upper Table 21 Lower Table 22 Punch Holder 23 Die Holder 24, 33 Bracket 25 Rotating Shaft 28 of Motor M 28 Worm Gear 29 Worm Wheel 30 Lower NC Device 30A CPU 30B Workpiece Shape detection means 30C Impact position calculation means 30D Side stopper turning angle calculation means 30E Input / output means 30F Storage means 30G Back gauge drive control means 34 Cylinder 35 Sun gear 36 Planetary gears 39, 40 Ball screw D Die P Punch W work W1 abutting turning angle of the inclination angle theta side stoppers second surface theta ₀ abutment 1

Claims (3)

[Claims] 1. A bending apparatus for abutting a work against a back gauge abutment and performing a predetermined bending work on the work, wherein a rotatable side stopper provided on the abutment and product information input in advance. Based on the workpiece shape detecting means for detecting the shape of the workpiece, and a protrusion for calculating the position of the abutting in the front-rear direction so that the abutment is inclined at a predetermined inclination angle based on the detected shape of the workpiece. The position calculation means and the abutment positioned at the calculated position in the front-rear direction,
Side stopper turning angle calculating means for calculating a turning angle of the side stopper with respect to the abutting surface of the work when the work is abutted, and moving the abutting to the calculated position in the front-rear direction,
A bending apparatus having a back gauge drive control means for driving and controlling the actuator for moving the abutting front-rear direction and the actuator for turning the side stopper so as to turn the side stopper by the calculated turning angle. 2. The bending according to claim 1, wherein a swivel shaft of the side stopper is swingably provided on a side surface of the abutment, and the swivel shaft is coupled to a side stopper swivel actuator via a power transmission mechanism. Processing equipment. 3. The bending apparatus according to claim 2, wherein the side stopper turning actuator comprises a motor or a cylinder.