JP2002001439A - Apparatus for bending process - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for bending process not requiring a surplus space, capable of supporting the rear portion of a work after the bending process, in a safty state and with simple constitution. SOLUTION: The apparatus is provided with a striker 5 which bumps against the work for positioning, and equipped with work supporting-members 30, 31 which support the work after bending process at the side of the striker 5. And it is provided with a work-supporting position computing means 24C for computing the supporting position (Y, Z) of the work after the bending process supported by the work supporting-members 30, 31 based on the bending angle θof the work and flange dimension H.

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 capable of supporting a rear portion of a work after bending with a simple structure that requires no extra space and is safe.

[0002]

[Prior art]

Conventionally, as an example of a bending apparatus, there is, for example, a press brake. This press brake moves one of an upper table on which a punch is mounted and a lower table on which a die is mounted up and down to move the punch and the die. The work is bent in cooperation with.

For example, as shown in FIG. 10, a press brake has side plates 42 on both sides of a machine body.
Above the hydraulic cylinder 45, an upper table 44 on which a punch P is mounted is attached to the hydraulic cylinder 45 so as to be vertically movable.

A die D is disposed immediately below the punch P, and the die D is mounted on the lower table 43.
The lower table 43 is provided with a back gauge having an abutment 41 behind the lower table 43.

With this configuration, after the butting 41 of the back gauge is positioned at a predetermined position, the workpiece W is abutted against the butting 41 and positioned, and the hydraulic cylinder 45 is operated to lower the punch P. In cooperation with the die D, the work W is bent as shown. .

[0007]

[Problems to be solved by the invention]

[0008] However, the above prior art (FIG. 10)
There are the following issues.

That is, in a press brake (FIG. 1)
0) For example, the punch P is lowered as described above, and the work W is bent in cooperation with the die D.

After the bending, the punch P is lifted to take out the work W released from the constraint between the punch P and the die D.

In this case, the center of gravity G of the workpiece W after the bending process is performed.
However, as shown in FIG.
Since the work W falls backward, the work W must be supported after the bending.

For this reason, conventionally, as shown in FIG. 11B, a follow-up device 40 is disposed rearward, and the work W after bending is supported by the follow-up device 40.

Alternatively, the worker is made to stand by at the rear, and the work W after bending is supported by the worker's hand.

However, as described above, the back gauge having the abutment 41 (FIG. 10) is provided behind the press brake.

Therefore, in order to dispose the follower 40 behind the press brake, a certain space must be secured, which is troublesome and time-consuming, and therefore costs high.

Further, it is very dangerous for the worker to get behind the press brake, which is not preferable.

An object of the present invention is to provide a bending apparatus capable of supporting a rear portion of a work after bending with a simple configuration, requiring no extra space, and in a safe state.

[0018]

In order to solve the above-mentioned problems, the present invention has an abutment 5 for abutting and positioning a workpiece W as shown in FIGS. Work supporting members 30 and 31 for supporting the work W after bending to the side
And a work supporting member 30 and 31 for supporting the work after bending by the work supporting members 30 and 31 based on the bending angle θ and the flange dimension H of the work. A technical means called a bending apparatus is provided, which is provided with a work supporting position calculating means 24C for calculating the position (Y, Z).

According to the configuration of the present invention, the work support members 30 and 31 are composed of, for example, the first work support member 30 and the second work support member 31 (FIG. 1). In the fifth step, the second work supporting members 31 are attached to the abutment main bodies 21, respectively, and after the work W is bent (FIG. 9B), the work supporting position calculating means 24C is turned on (FIG. 1).
The work support position (Y, Z) calculated in advance through
(C) For example, if the first work supporting member 30 is positioned, the rear part of the bent work W can be supported.

For this reason, the work supporting members 30, 31 can be provided by utilizing the abutment 5, so that no extra space is required, and since the worker does not need to enter the rear, a safe state can be obtained. Further, since the work support members 30 and 31 are merely provided on the abutment 5 and the abutment main body 21, the rear part of the bent work can be supported with a simple configuration.

[0021]

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.

The press brake has side plates 28 on both sides of the machine body, and a hydraulic cylinder 2 is provided above each side plate 28.
The upper table 1 on which a punch P is mounted is attached to the hydraulic cylinder 22 so as to be vertically movable.

A die D is disposed immediately below the punch P, and the die D is mounted on the lower table 2.

With this configuration, after the workpiece W is abutted against the back abutment 5 described later and positioned (FIG. 9).
(A)), the upper cylinder 1 is operated by operating the hydraulic cylinder 22.
Is lowered, the work W is bent by the cooperation of the punch P and the die D (FIGS. 9B to 9C).

Behind the lower table 2, there is provided a back gauge having an abutment 5. The back gauge is supported by the lower table 2 via a link mechanism B, which will be described later, and has a Y-axis direction and a Z-axis direction. (FIG. 9B).

A stretch 20 is provided in the left-right direction (X-axis direction) between the Z-axis drive mechanisms C of the link mechanism B (FIG. 8), and the stretch 20 has a front abutment 5 at the rear. The abutment body 21 to which the X-axis motor Mx is attached is slidably coupled via an X-axis guide 29, and a pinion (not shown) rotated by the X-axis motor Mx is connected to the rack 2 on the stretch 20 side.
3 is engaged.

According to this configuration, when the X-axis motor Mx is driven, the striking 5 is stretched through the striking body 21 through the striking body 21.
The position is moved by moving in the X-axis direction on the zero.

The abutment 5 includes a first work support member 30
However, the abutting main body 21 is provided with a second work supporting member 31, and a rear portion of the work W after bending by the first work supporting member 30 and the second work supporting member 31 (FIG. 9C). ) A work supporting member for supporting is configured.

FIG. 2 shows the work support member viewed from the front. The first work support member 30 and the second work support member 31 both support the rear part of the work W on their surfaces. Are formed in an arc shape so that the back surface of the work W is not damaged.

The material of the first work support member 30 and the second work support member 31 may be a metal such as iron.

Then, the inclination α of the work supporting member, which will be described later,
(Fig. 3 (A)-Fig. 3 (C))) and the inclination of the rear flange F of the work at 90 °-(θ / 2). (FIG. 4
6), the work W after bending is supported by one or both of the first work support member 30 and the second work support member 31.

That is, in FIG. 3, a straight line contacting both the first work support member 30 and the second work support member 31,
In other words, the inclination α of the envelope e is the inclination of the work supporting member, the dimension of the rear flange F of the work W after bending is H, and the bending angle at that time is θ.

In this case, the inclination α of the work supporting member is a value unique to the machine, and the inclination α of the work supporting member is
And the inclination of the rear flange F at 90 ° − (θ / 2) are, for example, divided into three as shown in FIGS. 3A to 3C.

(1) The case where α = 90 ° − (θ / 2) (FIG. 3A).

That is, as shown in FIG. 3A, the inclination α of the work supporting members 30, 31 is equal to the inclination 90 ° − (θ / 2) of the rear flange F of the work W.

In this case, as shown in FIG. 4A, if the flange dimension H is long, the rear flange F of the work W can be supported by both the first work support member 30 and the second work support member 31.

However, when the flange dimension H is short as shown in FIG.
Does not reach the work W, the rear flange F of the work W can be supported only by the first work support member 30 in front.

(2) Case of α <90 ° − (θ / 2) (FIG. 3B).

That is, as shown in FIG. 3B, the inclination α of the work supporting members 30 and 31 is smaller than the inclination 90 ° − (θ / 2) of the rear flange F of the work W.

In this case, as apparent from FIG. 5, only the front first work support member 30 supports the rear flange F of the work W.

For example, the bending angle θ is an acute angle, and the inclination 90 ° − (θ / 2) of the rear flange F is steeper than the inclination α of the work supporting members 30 and 31 (FIG. 3B). Therefore, as shown in FIGS. 5A and 5B, only the first work supporting member 30 can support the work W regardless of the size of the rear flange dimension H.

(3) When α> 90 ° − (θ / 2) (FIG. 3C).

That is, as shown in FIG. 3C, the inclination α of the work supporting members 30, 31 is larger than the inclination 90 ° − (θ / 2) of the rear flange F of the work W.

In this case, as shown in FIG. 6A, if the flange dimension H is long, the rear second work support member 3
1 can support the work W.

In the case of FIG. 6A, if the back gauge can be further retracted, the work W can be supported by the first work support member 30 at the front.

However, as shown in FIG. 6B, if the flange dimension H is short, the rear second work support member 31 does not reach the work W, and only the front first work support member 30 holds the work W. I can support it.

As described above, the magnitude relationship between the inclination α of the work supporting member and the inclination 90 ° − (θ / 2) of the rear flange F of the work (FIGS. 3A to 3C), and furthermore, Due to the length of the rear flange dimension H in the size relationship (FIGS. 4 to 6), the work W after the bending is formed by the first work support member 30.
And / or the second work support member 31.

On the other hand, the abutment 5 provided with the work supporting members 30 and 31 and the stretch 20 to which the abutment main body 21 is attached (FIG. 8) are, as described above, the Z-axis drive mechanism of the link mechanism B. It is provided between C.

The link mechanism B is such that the center portions of the links 3 and 4 are crossed and connected by a pin 34. The upper end of the link mechanism B is connected to the Z-axis drive block 15 of the Z-axis drive mechanism C by the hinges 15A and 16A, and the Z-axis is fixed. Pivotally attached to block 16 and the Z
The stretch 20 is attached to the outside of the support member 12 of the shaft drive mechanism C.

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 attached 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 18 and 6.

In this case, as is well known, the Y-axis driving mechanism A includes a Y-axis motor My fixed inside the support member 18 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 By moving the Y-axis driven blocks 9 coupled via the link mechanism B in the Y-axis direction along the Y-axis guides 7, respectively, the back gauge is moved in the Y-axis direction to provide a work support member provided on the abutment 5 side. 30 and 31 can be moved in the same direction (for example, FIG. 9B).

When the Z-axis motor Mz of the Z-axis driving mechanism C is driven, the ball screw 14 rotates,
The back gauge is moved in the Z-axis direction by moving the back gauge in the Z-axis direction by moving the Z-axis drive block 15 screwed into and out of the Z-axis fixed block 16 along the Z-axis guide 13 to and away from the Z-axis fixed block 16. Work support member 30 provided on the side,
31 can be moved in the same direction (for example, FIG. 9
(C)).

The press brake NC device 24 having such a configuration (FIG. 1) includes a CPU 24A,
4B, output means 24C, and work support position calculating means 2
4D, a storage unit 24E, a back gauge drive control unit 24F, and a hydraulic cylinder drive control unit 24G.

The CPU 24A controls the entire apparatus shown in FIG. 1, including the work support position calculating means 24C and the hydraulic cylinder drive control section 24E, according to the operation procedure for carrying out the present invention.

The input means 24B is composed of, for example, a keyboard and a mouse, and inputs work information such as the bending angle θ and the flange dimension H of the work W. The input work information is, for example, the work support position calculating means 24C. (FIG. 7)
(B)).

The output means 24C is, for example, a CRT or the like, and displays and confirms the process of calculating the work support position (Y, Z) by the work support position calculation means 24D and the machining process by the punch P and the die D. it can.

The work support position calculating means 24D calculates the bending angle θ of the work W input through the input means 24B.
And the workpiece support members 30, 3 based on the
1 is calculated.

For example, when a product as shown in FIG. 7A is bent, the bending angle θ, the flange size H, the bending length L, and the plate thickness t of the work W are input via the input means 24B.
Such information is input as work information, and bending is performed by cooperation of the punch P and the die D of the press brake (FIG. 1).

As shown in FIG. 7B, the bending angle θ and the flange dimension H in the work information are used for calculating the work support position (Y, Z) by the work support position calculation means 24D.

That is, in FIG. 7B, assuming that the center of the rear flange F of the work W after bending is supported by the second work support member 31, the die D is set as the origin of the YZ coordinates, which is clearly shown in FIG. The work support position (Y, Z) =
((H / 2) SIN (θ / 2), (H / 2) COS (θ
/ 2)).

The storage means 24E stores the work supporting member 3
Machine information such as the inclination α of 0 and 31 (FIG. 3) is stored in advance, and for example, the inclination α of the work supporting members 30 and 31 is
By collating the bending angle θ of the work W and the flange dimension H as the work information, the work supporting position (Y, Z) calculated by the work supporting position calculating means 24C is firstly moved.
It is used when positioning either the work support member 30 or the second work support member 31.

For example, as shown in FIG. 3A, when the inclination α of the work supporting members 30 and 31 is equal to the inclination of the rear flange F 90 ° − (θ / 2), the description is made with reference to FIG. As described above, if the flange dimension H is large (FIG. 4A), if both the first workpiece support member 30 and the second workpiece support member 31 are small, and if the flange dimension H is small (FIG. 4B),
The rear flanges F of the workpieces W can be supported by the second workpiece support members 31, respectively.

In this case, in order to simplify the control operation,
For example, regardless of whether the flange dimension H is large (FIG. 4A) or small (FIG. 4B), the front first work support member 30
The back gauge drive control means 2 to be described later is positioned so as to be positioned at the work support position (Y, Z) (FIG. 7B).
The Y-axis motor My and the Z-axis motor Mz can be controlled via 4F.

The back gauge drive control means 24F, based on the work support position (Y, Z) calculated by the work support position calculation means 24D (FIG. 7 (B)), performs machining with the Y-axis motor My and Z-axis after processing. By controlling the motor Mz, for example, the back gauge is advanced and raised to position the first work support member 30 at the work support position (Y, Z) (FIG. 9C).

In addition, back gauge drive control means 24F
Before processing, the X-axis motor Mx, the Y-axis motor My, and the Z-axis motor Mz are controlled to set up the abutment 5 at a predetermined position (FIG. 9A). By controlling the axis motor My and the Z-axis motor Mz, when the workpiece W is inclined backward with the rise of the punch P (FIG. 9D), the abutment 5 is moved backward so as to follow this inclination operation. By lowering, the worker can easily take out the work W.

The hydraulic cylinder drive control unit 24G controls the hydraulic cylinder 22, lowers the upper table 1 and cooperates with the punch P mounted on the upper table 1 and the die D immediately below the punch P to thereby move the work W. Bend.

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

First, as shown in FIG. 9A, the work W is brought into contact with the abutment 5 previously positioned at a predetermined position, and the hydraulic cylinder drive control unit 24G controls the hydraulic cylinder 22 via the hydraulic cylinder drive control unit 24G (FIG. 1). Then, the work W is bent by the cooperation of the punch P and the die D. At this time, the abutment 5 is retracted rearward.

After the bending, the Y-axis motor My is controlled by the back gauge drive control means 24F (FIG. 1), and FIG.
As shown in FIG. 3B, a Y-axis drive block 10 screwed to the ball screw 8 and a Y-axis driven block 9 coupled to the Y-axis drive block 10 via a link mechanism B along the Y-axis guide 7. By advancing, the back gauge is advanced, and the first work support member 30 provided on the abutment 5 side, for example, is brought closer to the work W.

When the first work support member 30 approaches the work W, the Z-axis motor Mz is controlled this time via the back gauge drive control means 24F (FIG. 1), and as shown in FIG. Z-axis drive block 1 screwed to screw 14
5 is advanced along the Z-axis guide 13 and the Z-axis drive block 15 is moved closer to the Z-axis fixed block 16 to extend the link mechanism B.

As a result, the back gauge rises, and the abutment 5 also rises, and the front first work support member 30 attached to it abuts on the work support position calculating means 24D.
Is positioned at the work support position (Y, Z) calculated in advance, and supports the rear flange F of the bent work W.

In this state, the hydraulic cylinder 22 is again controlled by the hydraulic cylinder drive control unit 24G (FIG. 1) to raise the punch P as shown in FIG.
The Y-axis motor My and the Z-axis motor Mz are controlled via the back gauge drive control means 24F (FIG. 1), and the Y-axis drive block 10 and the Y-axis driven block 9 are retracted along the Y-axis guide 7, and the Z-axis Drive block 15 is fixed to Z axis fixed block 16
By contracting the link mechanism B by separating it from the
The back gauge is retracted and lowered to move the first work support member 30 of the abutment 5 away from the work W.

Following this, the rear flange F of the work W
However, as shown in FIG.
Since the front flange F1 stands, the operator can easily take out the work W from the machine main body through the flange F1.

[0077]

As described above, according to the present invention, the work support member is constituted by, for example, a first work support member and a second work support member, and the first work support member is abutted against the second work support member. When the first work support member is positioned at a work support position calculated in advance by the work support position calculating means after the work is bent and the work is bent, the rear part of the bent work can be supported. .

For this reason, the work supporting member can be provided by utilizing the abutment, so that no extra space is required, and since there is no need for the operator to enter the rear, a safe state can be achieved. Since only the abutment and the work support member are provided on the abutment main body, there is an effect that the rear portion of the work after bending can be supported with a simple configuration.

[0079]

[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 work supporting members 30 and 31 constituting the present invention.

FIG. 3 is a diagram showing a magnitude relationship between the inclination α of the work supporting members 30 and 31 constituting the present invention and the inclination of the rear flange F of the work W;

FIG. 4 is a diagram showing a state in which the work supporting members 30, 31 support the work W when the inclination α of the work supporting members 30, 31 constituting the present invention is equal to the inclination of the rear flange F of the work W. .

FIG. 5 is a diagram showing a state in which the work supporting members 30, 31 support the work W when the inclination α of the work supporting members 30, 31 constituting the present invention is smaller than the inclination of the rear flange F of the work W; .

FIG. 6 is a view showing a state in which the work support members 30, 31 support the work W when the inclination α of the work support members 30, 31 constituting the present invention is larger than the inclination of the rear flange F of the work W. .

FIG. 7 is a view showing a work supporting position calculating means 24 constituting the present invention;
It is explanatory drawing of B.

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

FIG. 9 is a diagram illustrating the operation of the present invention.

FIG. 10 is a diagram illustrating a configuration of a conventional technique.

FIG. 11 is a diagram for explaining a problem of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper table 2 Lower table 3, 4 Link 5 Strike 20 Stretch 21 Strike main body 24 NC device 24A CPU 24B Input means 24C Work support position calculation means 24D Storage means 24E Hydraulic cylinder drive control unit 30 First work support member 31 First 2 Work support member A Y-axis drive mechanism B Link mechanism C Z-axis drive mechanism D Die e Envelope

Claims (5)

[Claims] 1. A bending apparatus comprising: an abutment for abutting and positioning a work, and a work support member for supporting the work after bending is provided on the abutting side. 2. The work support member comprises a first work support member and a second work support member, wherein the first work support member is provided on the abutment and the second work support member is provided on the abutment body. The bending apparatus according to claim 1. 3. The size of the inclination of the work supporting member and the inclination of the rear flange of the work, and furthermore, the length of the rear flange in the magnitude relationship, the work after bending is made to correspond to the first work supporting member. The bending apparatus according to claim 2, wherein the bending apparatus is supported by one or both of the second work support members. 4. The first work support member 30 and the second work support member 31 are both formed of metal such as iron, and the surfaces of the first work support member 30 and the second work support member 31 are arc-shaped. The bending device according to claim 2, wherein 5. A work support position calculating means, comprising the work support member according to claim 1 and calculating a work support position after bending by the work support member based on a bending angle and a flange size of the work. A bending apparatus.