JP2002035845A - Bending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bending machine that automatically calculates an impinger position including tolerances in a standard dimension at the time of processing a work, and also enhances work efficiency remaining the original standard dimension that excludes the tolerances. SOLUTION: The bending machine that conducts a bending work by impinging a work W on an impinger 5 mounted on a stretch 25 comprises an input means 24B that inputs a standard dimension and tolerances as machining data for the work W, an impinger-position calculation means 24E that calculates a position of the impingement 5 based on the input standard dimension and tolerances and an impinger-travel control means 24F that controls the traveling of the impinger 5 based on the calculated position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus, in particular, to automatically calculate the position of abutment including a tolerance with respect to a standard dimension when processing a workpiece, and to leave an original standard dimension without a tolerance. The present invention relates to a bending apparatus with improved processing efficiency.

[0002]

[Prior art]

Conventionally, when a work is bent by a press brake (FIG. 5), as is well known,
Input various data based on the shape of the work.

For example, when the side 'of the work W shown in FIG. 8 is bent first and then the side' is bent, data is input as follows.

That is, on the NC screen (FIG. 9), the flange size, angle, bending length, and the like are input for the side W of the work W, and then, for the side W of the work W, the flange size, angle, and bending are similarly obtained. Enter the length, etc.

[0006]

[Problems to be solved by the invention]

However, when data is input, if there is a tolerance, a value including the tolerance is input as data.

For example, as shown in FIG.
For each flange dimension, the standard dimension 3
0 (the unit is mm, the same applies hereinafter) with a tolerance of -0.3, +0.
In the case of 2, 30 + {(-0.3) + (+ 0.2)}
/2=29.95, and 20 + {(+ 0.3) + (− 0.3)} / 2 when the tolerance of the standard dimension 20 is ± 0.3.
= 20.0 as data (FIG. 9).

The values of 29.5 and 20.0 are defined as positions in the Y-axis direction of the abutment provided at the rear of the press brake (FIG. 5), and the abutment is positioned at this position. Butting is performed.

However, it is extremely troublesome and time-consuming for an operator to perform such a calculation, and a calculation error may occur, so that the calculation may have to be repeated many times.

As a result, time is required for the calculation work before processing the work W, and the processing efficiency is obviously reduced, for example, the original processing time is shortened accordingly.

Further, the data including the tolerance as described above is
Since the input is made on the C screen (FIG. 9), the standard dimensions (for example, the flange dimension 30 (FIG. 8) for the side 'of the workpiece W) that does not include the original tolerance cannot be known.

As a result, for example, even when a workpiece W having the same shape as the previous one is processed, the previous processing data cannot be reused, and it is clear that the processing efficiency similarly decreases in this respect.

An object of the present invention is to automatically calculate an abutment position including a tolerance with respect to a standard dimension when machining a work, and to leave the original standard dimension without a tolerance to improve machining efficiency. Provide an improved bending device.

[0015]

According to the present invention, as shown in FIGS. 1 to 7, (A) a work W is abutted against an abutment 5 mounted on a stretch 25 as shown in FIGS. In the bending apparatus for bending, (B) work W
Input means 24B for inputting a standard dimension and a tolerance as the machining data of the above, abutment position calculating means 24E for calculating a position of the abutment 5 based on the input standard dimension and the tolerance, and based on the calculated position. A technical means called a bending device is provided, which has a butting movement control means 24F for controlling the movement of the butting 5.

According to the present invention, for example, with respect to the flange dimension of the side of the workpiece W (FIG. 3B), the tolerance is −0 together with the standard dimension 30 described in the original three-sided view (FIG. 3A). Input means 24 such as a keyboard
B (FIG. 2), while inputting while looking at the NC screen 24C, the abutting position calculating means 24E (FIG. 1) uses the abutting position calculating means 24E (FIG. 1) in the longitudinal direction of the abutting 5 including the tolerances -0.3 and +0.2. Position 2
9.95 is (FIG. 6A) 30 +＋ (− 0.3) + (+
0.2)｝ /2=29.5.

Therefore, after the abutting movement control means 24F (FIG. 1) drives the Y-axis motor My (FIG. 4) based on the calculated front-rear position 29.95 to control the abutting movement 5, FIG. The workpiece W is abutted against the abutment 5 (FIG. 6 (A)), and bending is performed by cooperation of the punch P and the die D.

For this reason, the tolerance of the flange dimension with respect to the standard dimension 30 of the work W is -0.3, +0.2.
Can be automatically calculated, and the original standard dimension 30 which does not include the tolerances −0.3 and +0.2 remains (FIG. 2). Can be improved.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings according to embodiments. FIG. 1 is a diagram showing an embodiment of the present invention.

The bending apparatus shown in FIG. 1 is, for example, a press brake.

This press brake has side plates 30 on both sides of the machine body, and an upper table 1
The upper table 1 is provided with an intermediate plate 32.
The punch P is mounted via (FIG. 5).

A lower table 2 is disposed below the side plate 30, and a die D is mounted on the lower table 2 via a holding plate 33 (FIG. 5). The hydraulic cylinder 34 moves up and down.

With this configuration, after positioning the work W by abutting the work W against a back gauge 5 which will be described later disposed behind the lower table 2, the hydraulic cylinder 34 is operated to raise the lower table 2. The work W is bent by the cooperation of the punch P and the die D.

An operation panel 31 is movably attached to the upper table 1 (FIGS. 1 and 5), and a work W to be described later is processed via input means 24B such as a keyboard of the operation panel 31. Standard dimensions and tolerances are entered as data.

The operation panel 31 is provided with an NC screen (FIG. 2) which is an output means 24C formed by a CRT or the like, and displays an input state of the processing data of the work W.

For example, based on the three-sided view shown in FIG. 3A, for the work W shown in FIG. Enter

In this case, in the three views (FIG. 3 (A)), the standard dimensions and the tolerances are entered for the flange dimensions, and as shown in FIG. The standard dimensions 30 and the tolerances −0.3 and +0.2 of the flange dimensions, and the standard dimensions 20 and the tolerances ± 0.3 are input by operating the keyboard 24B or the like.

The processing data thus input is transmitted to the abutting position calculating means 24E (FIG. 1), which will be described later, and the following calculation is performed.

With respect to the side of the work W, the position of the abutment 5 in the Y-axis direction is 30 + {(− 0.3) + (+ 0.2)} / 2 = 29.95 (1) Regarding the side, the position of the abutment 5 in the Y-axis direction is 20 + {(+ 0.3) + (− 0.3)} / 2 = 20.0 (2)

The machining data (1) and (2) are transmitted to the abutting movement control means 24F (FIG. 1), and the abutting movement control means 24F causes a Y-axis motor My (FIG. 4) to be described later. ) Are driven, and each of the abutments 5 is 29.
5 (FIG. 6 (A)) and 20.0 position (FIG. 6 (B))
Movement is controlled.

Accordingly, the work W is abutted against the abutment 5 controlled to move to the predetermined position, and the hydraulic cylinder 34 is driven (FIG. 1) through a hydraulic cylinder drive control unit 24G, which will be described later, to control the die of the lower table 2. If D rises, punch P
Bending is performed in cooperation with.

In addition, standard dimensions such as an angle (FIG. 2), a bending length, and a one-sided extension of the work W as processing data are inputted while viewing the NC screen 24C via the keyboard 24B.

In this case, the following calculation is performed by the abutting position calculating means 24E for the position of the abutment 5 in the Y-axis direction in consideration of the one-sided extension.

With respect to the side of the work W, the position of the abutment 5 in the Y-axis direction is 35-1.6 + {(− 0.3) + (+ 0.2)} / 2 = 28.35 (3) With respect to the side of the workpiece W, the position of the butting 5 in the Y-axis direction is 20-1.6 + {(+ 0.3) + (− 0.3)} / 2 = 18.4 (4)

The processing data of (3) and (4) is similarly transmitted to the abutting movement control means 24F (FIG. 1), and the abutting movement control means 24F controls the Y-axis motor My (FIG. 4). ) Are driven, and each of the abutments 5 is in the Y-axis direction 28.
35 (FIG. 7A) and at the position of 18.4 (FIG. 7A).
(B)) The movement is controlled.

As described above, according to the present invention, the NC screen 2
4C (FIG. 2), a column for inputting standard dimensions and tolerances of the processing data is provided, and the user can operate the keyboard 24B and the like to input the above-mentioned predetermined numerical values while viewing the three-view drawing (FIG. 3 (A)). The position of the abutment 5 is automatically calculated via the abutment position calculation means 24E, and the original standard dimensions such as the above-described flange dimensions remain on the NC screen.

On the other hand, a back gauge having an abutment 5 is provided behind the lower table 2, and the back gauge is supported by the lower table 2 via a link mechanism B (FIG. 4) described later. .

Z of link mechanism B on both sides of lower table 2
A stretch 25 is provided between the shaft drive mechanisms C in the left-right direction (X-axis direction), and a striking body 26 having a striking strut 5 at the front is attached to the stretch 25.

The abutment body 26 is slidably connected to the stretch 25 via an X-axis guide 29, has an X-axis motor Mx, and a pinion 27 rotated by the X-axis motor Mx is provided on the stretch 25 side. It is in mesh with the rack 28.

According to this configuration, if the abutting movement control means 24F (FIG. 1) drives the X-axis motor Mx based on the bending length input via the keyboard 24B, the abutting body 26 is used. The abutment 5 is moved and positioned on the stretch 25 by the bending length in the X-axis direction.

The abutment main body 26 (FIG. 4) has the abutment 5 at the front portion thereof as described above, and the work W is abutted against the tip of the abutment 5 for positioning. I have.

The two ends of the stretch 25 are connected to a pivot shaft 23.
Is attached to the Z-axis drive mechanism C of the link mechanism B via the.

That is, on the outer side of the support member 12 constituting the Z-axis driving mechanism C, a turning shaft 23 is supported by a bearing 22 so as to be turnable, and a turning plate 21 is provided on the turning shaft 23 integrally therewith. Have been.

A guide 20 is attached to the revolving plate 24, and the stretch 2
5 is guided in the X-axis direction.

With this configuration, as is well known, the work W can be abutted obliquely by inclining the stretch 25 obliquely.

Further, the Z-axis drive mechanism C to which the stretch 20 is attached is pivotally attached to the upper end of the link mechanism B.

That is, the link mechanism B is such that the central portions of the links 3 and 4 are crossed and connected by the pin 34, and the upper end thereof is connected to the Z-axis drive mechanism C by the hinges 15A and 16A.
The stretch 25 is attached to the shaft drive block 15 and the Z-axis fixed block 16 via the turning shaft 23 outside the support member 12 of the Z-axis drive mechanism C as described above.

In this case, as is well known, the Z-axis drive mechanism C includes a Z-axis motor Mz fixed inside the support member 12 and a Z-axis fixed block 16 coupled to the Z-axis motor Mz. It has a penetrating ball screw 14 and a Z-axis drive block 15 which is screwed to the ball screw 14 and moves along the Z-axis guide 13.

The lower end of the link mechanism B is pivotally connected to the Y-axis driven block 9 and the Y-axis drive block 10 of the Y-axis drive mechanism A by hinges 9A and 10A. It is attached to both sides of the lower table 2 via members 6.

In this case, as is well known, the Y-axis drive mechanism A includes a Y-axis motor My fixed inside the support member 6 and a ball screw 8 coupled to the Y-axis motor My.
A Y-axis drive block 10 which is screwed into the ball screw 8 and moves along the Y-axis guide 7;
The Y-axis drive block 10 is combined with the Y-axis drive block 10.
Has a Y-axis driven block 9 that moves along the Y-axis guide 7 according to the movement of.

With this configuration, when the Y-axis motor My of the Y-axis drive mechanism A is driven, the ball screw 8 rotates, and the Y-axis drive block 10 screwed to the ball screw 8 and the Y-axis drive block 10 Each of the Y-axis driven blocks 9 coupled via the link mechanism B can be moved in the Y-axis direction along the Y-axis guide 7.

As a result, the back gauge is moved in the Y-axis direction, for example, as described above with reference to FIGS. 6 (A) and 6 (B).
As shown in (1), the abutment 5 can be positioned at the positions in the Y-axis direction of 29.95 and 20.0 with respect to the sides.

When the Z-axis motor Mz of the Z-axis driving mechanism C is driven, the ball screw 14 is rotated.
The Z-axis drive block 15 screwed into and out of the Z-axis fixed block 16 along the Z-axis guide 13 allows the link mechanism B to expand and contract.

Thus, the back gauge can be moved in the Z-axis direction, and the butting 5 can be moved up and down.

The NC device 24 of the press brake having such a configuration (FIG. 1) includes a CPU 24A,
4B, an output unit 24C, a storage unit 24D, an abutment position calculation unit 24E, an abutment movement control unit 24F, and a hydraulic cylinder drive control unit 24G.

The CPU 24A controls the entire apparatus shown in FIG. 1, including the abutting position calculating means 24E and the abutting movement controlling means 24F, according to the operation procedure for carrying out the present invention.

The input means 24B is composed of, for example, a keyboard (FIG. 2), and inputs standard dimensions and tolerances as processing data of the work W as described above, and calculates the abutment position as described above. This is used for calculating the five abutment positions by the means 24E (for example, FIG. 6A).

The output means 24C is, for example, an N
This is a screen C on which the input state of standard dimensions and tolerances by the input means 24B is displayed (FIG. 2).

The storage means 24D stores the tip R of the punch P
This is used to store die information such as the die and the shoulder R of the die in advance, and to automatically determine the one-sided extension (FIG. 2).

The abutment position calculating means 24E calculates the position of the abutment 5.

For example, as described above, the work W
When the standard dimensions and the tolerances are input through the input means 24B for the flange dimensions (FIG. 2) of FIG. 3, the abutting position calculating means 24E performs the abutting according to the equations (1) and (2). 5 is calculated in the Y-axis direction (FIG. 6).

The striking movement control means 24F drives the aforementioned X-axis motor Mx, Y-axis motor My and Z-axis motor Mz based on the position of the striking 5 calculated by the striking position calculating means 24E. Then, the abutment 5 is controlled to move to a predetermined position.

The operation of the present invention having the above configuration will be described below.

(1) Input operation of standard dimensions and tolerances.

In this case, a three-sided view shown in FIG. 3A is prepared for the workpiece W to be processed, and based on this, the workpiece W shown in FIG. 3B is processed in the order of side → side. Shall be.

Then, as shown in FIG. 2, the operator, with respect to the side of the workpiece W, has a standard dimension 30 of the flange dimension, a tolerance of −0.3, +0.2, and a standard dimension 2.
0 and the tolerance ± 0.3, operate the keyboard 24B to set NC
Input on the screen 24C.

In addition, all the processing data such as the angle (FIG. 2), the bending length, the one-sided extension, the plate thickness, and the material of the work W are similarly input on the NC screen 24C.

(2) Operation for calculating the position of the abutment 5

When the operator inputs the processing data as described above, the data is transmitted (FIG. 1) to the striking position calculating means 24E, and the striking position is calculated by the striking position calculating means 24E.
Is calculated.

For example, when the one-sided extension (FIG. 2) is not taken into account, the position of the abutment 5 in the Y-axis direction is calculated for the side of the work W in accordance with the above equations (1) and (2).

In addition, when the one-sided extension (FIG. 2) is taken into consideration, the position of the abutment 5 in the Y-axis direction is calculated for the side of the work W according to the equations (3) and (4).

In addition, the positions of the abutment 5 in the X-axis direction and the Z-axis direction are calculated via the abutment position calculation means 24E based on predetermined processing data.

(3) Movement control operation of abutment 5

The position of the abutment 5 calculated by the abutment position calculating means 24E (eg, equation (1) or (2)) is transmitted to the abutting movement control means 24F, and the Y-axis motor My (FIG. 4). )
Is driven, for example, the abutment 5 is moved to the positions 29.95, 20.
The movement is controlled to 0 (FIGS. 6A and 6B).

When one-sided extension (FIG. 2) is taken into account, the abutment 5 similarly calculated by the abutment position calculating means 24E is used.
(For example, Expressions (3) and (4)) are transmitted to the abutting movement control unit 24F, and when the Y-axis motor My (FIG. 4) is driven, the position of This 5 is controlled to move to positions 28.35 and 18.4 in the Y-axis direction (FIGS. 7A and 7B).

In addition, the positions of the abutment 5 in the X-axis direction and the Z-axis direction calculated by the abutting position calculating means 24E are also transmitted to the abutting movement control means 24F, and similarly, the X-axis motor Mx and the Z-axis motor Mz. Is driven, the side of the workpiece W,
, The butting 5 is controlled to move to a position in the X axis direction and a position in the Z axis direction.

(4) Abutment of work W and bending operation.

Next, the work W is abutted against the abutment 5 controlled to move to the predetermined position, and the hydraulic cylinder drive control unit 24G is operated to raise the die D via the lower table 2. In cooperation with the above, first, the side of the work W is bent, and then the work W is turned 180 ° and the side is bent.

[0079]

As described above, according to the present invention, the position of the abutment including the tolerance with respect to the standard dimension at the time of processing the work is automatically calculated, and the original standard dimension including no tolerance is left. Thus, the technical effect of providing a bending apparatus with improved processing efficiency has been achieved.

[0080]

[Brief description of the drawings]

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

FIG. 2 is a diagram showing an input state of machining data according to the present invention.

FIG. 3 is a view showing a workpiece W to be processed according to the present invention.

FIG. 4 is a detailed view of abutment 5 constituting the present invention.

FIG. 5 is a diagram showing an example of a bending apparatus according to the present invention.

FIG. 6 is a diagram showing a first embodiment of the position of the abutment 5 in the Y-axis direction calculated via the abutment position calculation means 24E constituting the present invention.

FIG. 7 is a diagram showing a second embodiment of the position of the abutment 5 in the Y-axis direction calculated via the abutment position calculation means 24E constituting the present invention.

FIG. 8 is a view showing a work W to be machined in a conventional technique.

FIG. 9 is a diagram for explaining a problem of the related art.

[Explanation of symbols]

 Reference Signs List 1 upper table 2 lower table 3, 4 link 5 butting 20 guide 21 turning plate 22 bearing 23 turning shaft 24 NC device 24A CPU 24B input means 24C output means 24D storage means 24E hitting position calculating means 24F hitting movement control means 24G Hydraulic cylinder drive control unit 25 Stretch 26 Butt body 27 Pinion 28 Rack 29 X-axis guide 30 Side plate 31 Operation panel 32 Intermediate plate 33 Holding plate 34 Hydraulic cylinder A Y-axis drive mechanism B Link mechanism C Z-axis drive mechanism D Die P Punch

Claims (4)

[Claims] An input means for inputting a standard dimension and a tolerance as machining data of a workpiece, and an input means for inputting a standard dimension and a tolerance as processing data of the workpiece. A striking position calculating means for calculating a striking position based on the calculated position, and a striking movement control means for controlling the striking movement based on the calculated position. 2. A standard dimension and a tolerance of the flange of the workpiece are inputted through an input means, a position in the front-rear direction of the abutment is calculated by an abutment position calculating means, and the abutment is performed based on the position in the front-rear direction. 2. The bending apparatus according to claim 1, wherein the movement control means controls the movement of the abutment by driving the Y-axis motor. 3. A method according to claim 2, wherein a field for inputting a standard dimension and a tolerance is provided on the NC screen for the flange dimension of the workpiece, and the standard dimension and the tolerance are input by operating a keyboard while looking at the NC screen. Bending equipment. 4. The apparatus according to claim 2, wherein the one-sided extension of the work is input through the input unit, and the abutting position calculating unit calculates the abutting longitudinal position in consideration of the input one-sided extension. Bending equipment.