JPH11290952A - Bending system and bending method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working rate and machining precision, and to simplify the structure and movement of a bending system. SOLUTION: The system is composed of a bending machine 1 and a positioning device 2; the bending machine 1 is constituted of plate holders 12, 15 for vertically clamping a workpiece W and a bending die 18 arranged in the front and the rear of the plate holders 12, 15; and the positioning device 2 is constituted of stopper pins 21R, 21L which are for setting the origin of the workpiece and which are installed near the bending die 18, and moving units 22L, 22R which move by the shaft penetrating through the bending machine 1, and suck the workpiece W after it is abutted on the stopper pin 21R, 21L, and which thereby position the workpiece at a machining position K.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a bending system,
In particular, the present invention relates to a bending system in which the operation rate and the processing accuracy are improved and the structure and operation are simplified, and a bending method using the system.

[0002]

2. Description of the Related Art A conventional bending system is shown in FIG.
As shown in FIG.
have.

This bending machine 50 (FIG. 8A) has a receiving base 56, on which a receiving die 55 is placed, and on both sides thereof, cylinders 54 are provided. Has been fixed.

[0004] A holding ram 51 is connected to the cylinder 54, and a holding mold 52 is attached to the holding ram 51.

[0005] A bending ram 58 having a bending die 57 is provided on the receiving base 56 and before and after the receiving die 55.
And the bending ram 58 is connected to a cylinder 59.

[0008] As shown in FIG. 8 (B), positioning tables 100 are arranged before and after the bending machine 50.

Each of the two positioning tables 100 has the same configuration, and includes a contact pin 101 provided between roller conveyors 102. The contact pin 101 is a ball screw 103 driven by an X-axis motor Mx. Thereby, it moves in the longitudinal direction.

With this configuration, first, as shown in FIG. 9A, the positioning table 100 on the right side as viewed in the drawing.
Drive the X-axis motor Mx to rotate the ball screw 103 so that the abutting pin 10 is positioned at the position of the flange length F1 of the workpiece W.
1 is positioned, and the lifting cylinder 104 is operated so that the abutment pin 101 is projected upward from the pass line PL.

In this state, the left roller conveyor 102
The workpiece W conveyed by the above is brought into contact with the protruding abutment pin 101 and positioned at the processing position (arrow a).

The cylinders 54 (FIG. 8A) and 5
9, the right side is bent by the bending die 57 while the work W is held between the holding die 52 and the receiving die 55 (the left side in the lower drawing of FIG. 9A).

When the bending of the right side is completed, this time,
As shown in FIG. 9B, the left positioning table 10
The X-axis motor Mx of 0 is driven to rotate the ball screw 103, and the abutting pin 1
01 is positioned, and the lifting cylinder 104 is operated so that the abutment pin 101 is projected upward from the pass line PL.

In this state, the right roller conveyor 102
The workpiece W conveyed by the above is brought into contact with the projecting abutment pin 101 and positioned at the processing position (arrow c).

The cylinders 54 (FIG. 8A) and 5
9, the left side is bent by the bending die 57 in a state where the work W is held between the holding die 52 and the receiving die 55 (the left side in the lower drawing of FIG. 9B).

[0014]

However, the above prior art has the following problems. (1) The operation rate of the device is low. For example, as shown in FIG. 9A, after driving the right positioning table 100 and moving the abutment pin 101 to a predetermined position, the work W is exclusively driven by the forward rotation of the left roller conveyor 102. , The positioning with respect to the processing position (arrow a) is performed.

Similarly, as shown in FIG. 9B, after driving the positioning table 100 on the left side and moving the abutment pin 101 to a predetermined position, the work W is exclusively transferred to the roller conveyor 102 on the right side. , Positioning (arrow c) with respect to the processing position is performed.

As described above, conventionally, separate one-axis positioning units are required before and after the bending machine 50, and each of them is separately driven.

Therefore, the operation time of the abutment pin 101 is only a short time at the beginning while the workpiece W is loaded and positioned to the processing position. Of the positioning table 100 is stopped,
When the left side is being processed, the right positioning table 100 is at rest.

Therefore, the conventional positioning table 100
There is a problem that the operating rate is extremely low.

(2) Processing accuracy is low. As described in (1), conventionally, the transfer of the work W is performed only by the roller conveyor 102, and the work W is positioned with respect to the processing position (arrow a in FIG. 9;
c).

However, the roller conveyor 102 and the work W
Is low, the work W tends to slip during conveyance, and the work W may not be accurately positioned at a predetermined position. .

This means that the tip end of the work W is sandwiched between the holding mold 52 and the receiving mold 53 as shown in the lower part of FIG. 9A and the lower part of FIG. The same applies to the hemming process in which the pressing die 52 is used to crush the work W. Since the work W is moved back and forth by the roller conveyor 102, the work W cannot be positioned at an accurate position and cannot be adapted to the hemming process.

Therefore, conventionally, the positioning accuracy is reduced,
As a result, the processing accuracy was also reduced.

(3) There is waste in structure and operation. Conventionally, as described in (1), the positioning table 100 having exactly the same configuration is disposed before and after the bending machine 50.

For this reason, two X-axis motors Mx are required, and two ball screws 103 need to be separately attached, which is wasteful in structure.

Further, it is necessary to move the two abutment pins 101 in the longitudinal direction according to the flange lengths F1 and F2 of the work W to be carried in, which is wasteful in operation.

An object of the present invention is to improve the operation rate and processing accuracy in a bending system and to simplify the structure and operation.

[0027]

In order to solve the above-mentioned problems, the present invention has a bending machine 1 and a positioning device 2 as shown in FIGS. Presses 12 and 15 for vertically clamping
The positioning device 2 is constituted of a plurality of bending dies 18 disposed before and after the bending dies 2 and 15. The positioning device 2 is provided with work abutment pins 21 </ b> R and 21 </ b> L provided near the bending dies 18.
And moving units 22L and 22R that move by one axis penetrating the bending machine 1 and adsorb the work W after contacting the abutment pins 21R and 21L to position the work W at the processing position K. Bending system (Fig. 1
5 to 7) and (1) the work W is transferred to the conveyor means 31.
(2) a step of bringing one end of the work W conveyed by the conveyor means 31 into contact with one of the contact pins 21R, and (3) a work W after contacting the one of the contact pins 21R. (1) bending the one end of the work W, (5) bending the other end of the work W, and (5) bending the other end of the work W to the other end. After passing through the abutment pin 21L, the conveyor means 31 is rotated in the reverse direction to
Contacting the other end of the workpiece W with the other abutting pin 21L; (6) the work W after abutting the other abutting pin 21L.
And (7) bending the other end of the work W by bending the other end of the work W by sucking the workpiece W by the one-axis moving unit 22R. A technical means called a processing method (FIGS. 6 and 7) is employed.

Therefore, according to the structure of the present invention, the work W
In the case where either one end or the other end of the workpiece W is bent, the work W after contacting the abutment pins 21R and 21L is positioned at the processing position K (see FIGS. 7B and 7B).
(F)), the moving unit 22 constituting the positioning device 2
Since the workpiece W is sucked and transported by L and 22R, the time during which the positioning device 2 is at rest is reduced, and the operation rate is improved.

When the work W is positioned at the processing position K, the work W is suctioned and conveyed by the vacuum pads 28 of the moving units 22L and 22R, so that the work W is not slipped to an accurate position. Is positioned,
Processing accuracy is improved.

Further, since the moving units 22L and 22R, which are positioning and conveying means, are moved by one axis passing through the bending machine 1, one X-axis motor Mx (FIG. 1) and one ball screw 24 are attached. Only, the structure is simplified, and the abutment pins 21R, 21L are fixed in the vicinity of the bending die 18 and do not need to be moved in the longitudinal direction, thereby simplifying the operation.

That is, in the bending system, the operation rate and the processing accuracy can be improved, and the structure and operation can be simplified.

[0032]

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 perspective view showing an embodiment of the present invention, and FIGS. 2, 3, and 4 are a front view, a side view, and a plan view, respectively.

In FIG. 1, reference numeral 1 denotes a bending machine, 2
Is a positioning device.

The bending machine 1 has a lower frame 17,
A lower plate retainer 15 is placed on the lower frame 17, and cylinders 14 are fixed on both sides thereof.

An upper frame 11 is connected to the cylinder 14 via a Piroton rod 14A, and an upper plate retainer 12 is attached to the upper frame 11.

A bending die 18 is arranged on the lower frame 17 and before and after the lower plate retainer 15. With this configuration, at the time of workpiece processing (FIG. 7)
(C), FIG. 7 (G), the upper frame 11 descends along the guide post 13, and the work W is held between the upper plate holder 12 and the lower plate holder 15.

The bending die 18 is mounted on a bending ram 16 which is mounted on a Piroton rod 16B.
(FIG. 2A) is connected to the cylinder 16A.

The bending ram 16 has an opening 19B at substantially the center and openings 19A at both sides thereof.

A ball screw 24 of the positioning device 2 to be described later penetrates the opening 19B, and the opening 19A
Similarly, the linear bearing 26 of the positioning device 2 penetrates.

Further, both the opening 19B and the opening 19A are formed vertically long (FIG. 2A, FIG.
(B)) The bending ram 16 can be moved up and down by the cylinder 16A while the ball screw 24 and the linear motion bearing 26 are penetrated (FIG. 2B).

Therefore, with this configuration, the work W positioned at the processing position K (FIG. 5, FIG. 7B, FIG. 7F) by the moving unit 22 of the positioning device 2 described below is moved to the upper plate. When the bending ram 16 is moved up and down after being held between the presser 12 and the lower plate presser 15, the right side and the left side (the left side in FIG. 5A, the left side in FIG.
(C), FIG. 7 (G)), a forward bending process is performed by the bending die 18, and further, the tip of the work W on the lower plate retainer 15 is pressed by the upper plate retainer 12, thereby performing a hemming process. (The right side of FIG. 5A and the right side of FIG. 5B).

The positioning device 2 has striking pins 21R and 21L for setting the work origin, and the striking pins 21R and 21L
1L is a cylinder 21 which is disposed near a bending die 18 constituting the bending machine 1 and which stands on the lower frame 17.
A causes the intruder to appear in and out of the pass line PL (FIG. 3, FIG. 7 (A), FIG. 7 (B), FIG. 7 (E),
(FIG. 7F)).

Of the abutting pins 21R and 21L, a passing sensor 29 is provided to the abutting pin 21L on the side of loading the work W, and in FIGS. 1, 3 and 4, the abutting pin 21L on the X-axis motor Mx side. As will be described later (step 106 in FIG. 6, FIG. 7D), it is detected whether or not the other end of the work W has passed above the abutting pin 21L.

The positioning device 2 has a table frame 23, and an X-axis motor Mx is mounted on the rightmost table frame 23 in FIG. 1 via a bracket 27.

The X-axis motor Mx has a ball screw 24
The ball screw 24 extends in the X-axis direction, penetrates the opening 19B formed in the bending ram 16, extends to the opposite side, and is supported by the leftmost table frame 23 via the support column 25.

A linear motion bearing 26 is mounted on the table frame 23.
X is located on both sides of the ball screw 24 (FIG. 2B).
Opening 19A extending in the axial direction and formed in bending ram 16
And stops near the lower lower frame 17 of the bending machine 1. . That is, the table frame 23 is divided right and left with respect to the bending machine 1 (FIG. 3), fixed to the lower frame 17 of the bending machine 1, and a linear motion bearing 26 is placed on each of the left and right table frames 23. ing.

The moving units 22L and 22R are screwed into the ball screw 24.
L and 22R are slidingly connected to the linear motion bearing 26.

For example, two moving units 22L and 22R are arranged on the opposite side of the bending machine 1 as a boundary, and a vacuum pad 28 is mounted on the moving units 22L and 22R via a cylinder 28A. The work W after contacting the abutment pins 21R and 21L is sucked by the vacuum pad 28 and positioned at the processing position K (FIGS. 7B and 7F).

Further, outside the linear motion bearings 26 constituting the positioning device 2, the conveyor frames 32A, 32
B is erected, and the conveyor frames 32A and 32B extend through the lower frame 17 of the bending machine 1 and extend in the X-axis direction.

A conveyor means is attached to the conveyor frames 32A and 32B. The conveyor means is, for example, a belt conveyor or a roller conveyor,
In the present embodiment, as shown, a roller conveyor 31 is rotatably mounted, transports a work W carried into the positioning device 2, and abuts the contact pins 21R, 21R.
L (FIG. 7A, FIG. 7).
(E)).

A friction belt 33 is in contact with the lower surface of the roller conveyor 31. As shown in FIG. 1, the friction belt 33 includes a driven pulley 34 rotatably mounted on one conveyor frame 32A and an idle roller. through 35, it is wound driven pulley 36 wound circulation motor M _R.

A driven pulley 34 is rotatably attached to both ends of the other conveyor frame 32B (FIGS. 1 and 4), and the other conveyor frame 32B and the driven pulley 34 of the one conveyor frame 32A are connected to each other. Are connected to each other by a shaft 37, as shown in FIGS.

Accordingly, by driving one circulation motor M _R and circulating the friction belt 33 with this configuration, the roller conveyors 31 on both sides can simultaneously rotate forward and reverse.

Hereinafter, the operation of the present invention having the above configuration will be described.
A description will be given based on FIGS. Note that the following operation is controlled by the NC 3 shown in FIG.

(1) Operation for bending one end of the work W. Operation from loading of work W to contact with one abutting pin 21R

First, when the work W is carried into the positioning device 2 in step 101 of FIG. 6, next, in step 102, the work W is brought into contact with one of the abutting pins 21R (FIG. 7A). ).

That is, when the work W is carried in, the NC 3 that has detected it (FIG. 4) transmits a control signal S6 to one of the abutting pins 21R, for example, the abutting pin 21R on the right side in FIG. causes the abutting pin 21R projecting from the pass line PL (FIG. 7 (a)), and transmits a control signal S1 to the circulation motor M _R, is moved toward the workpiece W on the roller conveyor 31 projecting to those pins 21R Abut it.

Operation from Positioning to Bending by Moving Unit 22L

When the work W comes into contact with the right abutment pin 21R, in step 103, the moving unit 22L positions the work W.

That is, when the work W comes into contact with the right abutment pin 21R, the NC3 that has received the abutment signal S6 from the abutment pin 21R transmits a control signal S3 to the left moving unit 22L.

As a result, the vacuum pad 28 is raised to the pass line PL via the cylinder 28A (FIG. 7B), and the work W contacted with the abutting pin 21R by the vacuum pad 28 is sucked. Thereafter, the abutment pin 21R is lowered to enter from the pass line PL.

Then, the NC 3 transmits the control signal S2 to the X-axis motor Mx to rotate the ball screw 24, and moves the moving unit 22L to position the workpiece W at the processing position K. In this case, the moving unit 22L moves forward or backward, and positions one end of the work W at the processing position K (FIG. 7B).

Next, in step 104, one end of the work W is bent.

That is, the control signal S5 from the NC 3 (FIG. 4)
(FIG. 2A), the upper frame 11 descends, and the work W positioned at the processing position K is clamped by the upper plate retainer 12 and the lower plate retainer 15. The normal bending process is performed by the bending die 18 (FIGS. 7C and 5A).

In the case of hemming, the work W positioned at the processing position K is pressed by the upper plate holder 12 (right diagram in FIG. 5A).

(2) Operation for bending the other end of the work W. Next, in Step 105, the other end of the work W is passed above the other abutting pin 21L, for example, the left abutting pin 21L in FIG.

That is, when one end of the work W is bent, in step 105, the NC 3 transmits the control signal S3 again to the left moving unit 22L to release the work W (FIG. 7 ( D)), circulation motor M _R
, The work W is conveyed by the roller conveyor 31, and the other end is moved to the left abutment pin 21L.
(FIG. 7D).

In step 106, it is determined whether or not the passage sensor 29 is on. If not (NO), the process returns to step 105. If the passage sensor 29 is on (YES), Proceed to step 107 of the column.

That is, when the NC 3 receives the passage detection signal S 8 (FIG. 4) from the passage sensor 29,
Is determined to have passed above the abutment pin 21L,
The roller conveyor 31 is stopped.

Then, in step 107, the roller conveyor 31 is reversed, and the other end of the work W is brought into contact with the left abutment pin 21L.

That is, the NC 3 causes the left abutment pin 21L to protrude from the pass line PL (FIG. 7E).
The roller conveyor 31 is reversely rotated via the circulation motor M _R, and the other end of the work W is brought into contact with the contact pin 21.

Operation from Positioning by Moving Unit 22R to End of Processing When the work W comes into contact with the left abutment pin 21L, at step 108, the work W
Is positioned at the other end.

That is, when the other end of the work W comes into contact with the left abutment pin 21L (signal S4), the NC 3 transmits a control signal S7 to the right moving unit 22R and the cylinder 2
8A, the vacuum pad 28 is raised to the pass line PL, and the work W that has contacted the left abutment pin 21L
(FIG. 7F).

After that, the NC 3 lowers the abutment pin 21L and immerses it from the pass line PL (FIG. 7 (F)).

Next, the NC 3 rotates the ball screw 24 (signal S2) and moves the moving unit 22R to position the workpiece W at the processing position K. In this case, the moving unit 22R moves forward or backward, and positions the other end of the work W at the processing position K (FIG. 7F).

Next, in step 108, the other end of the work W is bent.

That is, the control signal S5 from the NC 3 (FIG. 4)
(FIG. 2A), the upper frame 11 descends, and the work W positioned at the processing position K is clamped by the upper plate retainer 12 and the lower plate retainer 15. The normal bending process is performed by the bending die 18 (FIG. 7 (G), left drawing of FIG. 5 (B)).

In the case of hemming, the work W positioned at the processing position K is pressed by the upper plate retainer 12 (the right figure in FIG. 5B).

Then, in step 110, it is determined whether or not the processing has been completed. If the processing has not been completed (NO), the process returns to step 101 and the above operation is repeated. YES), all the operations are completed, and the operation is stopped (END).

In the above embodiment, the bending machine 1
Is the short side of the workpiece W, (FIG. 7C, FIG.
(G)) The case of the short side bending machine for bending is described in detail. However, the present invention is not limited to this, and is also applicable to the case of the long side bending machine for bending the long side of the work. Of course, it produces an effect.

[0081]

As described above, according to the present invention, a bending system and a bending method using the system are provided by providing an abutment pin for setting a work origin near a bending die. The work after contacting the workpiece is attracted by the one-axis moving unit that penetrates the bending machine and is positioned at the processing position, so that the positioning unit is stopped because the moving unit performs positioning. The work time is reduced, the operation rate is improved, and the work is sucked and positioned, so that the work is positioned at an accurate position without slipping, so that the processing accuracy is improved. The structure is simplified due to the uniaxial penetrating system, and the abutment pin is fixed in the vicinity of the bending mold and does not need to be moved in the longitudinal direction, so that the operation is also simplified. It became possible to achieve the technical effect of being of.

[0082]

[Brief description of the drawings]

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

FIG. 2 is a front view showing the embodiment of the present invention.

FIG. 3 is a side view showing an embodiment of the present invention.

FIG. 4 is a plan view showing an embodiment of the present invention.

FIG. 5 is a diagram showing an example of flanging and hemming according to the present invention.

FIG. 6 is a flowchart illustrating the operation of the present invention.

FIG. 7 is a diagram showing an operation mode of the bending system according to the present invention.

FIG. 8 is a configuration diagram of a conventional technique.

FIG. 9 is an explanatory diagram of a problem in the related art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bending machine 2 Positioning device 11 Upper frame 12 Upper plate holder 13 Guide post 14 Cylinder of upper table 11 Lower plate holder 16 Bending ram 17 Lower frame 18 Bending mold 21R, 21L Butt pin 22 Moving unit 23 Table frame 24 Ball Screw 26 Linear motion bearing 28 Vacuum pad 29 Passage sensor 31 Roller conveyor 32A, 32B Conveyor frame 33 Friction belt 34 Follower pulley 35 Id roller 36 Drive pulley Mx X-axis motor M _R circulation motor W Work

Claims (3)

[Claims] 1. A bending machine and a positioning device, comprising: a plate holder for vertically clamping a workpiece W; and a bending die arranged before and after the plate holder. A moving pin which is provided near the bending die for setting the work origin, and which moves by one axis passing through the bending machine to suck the work after contacting the pressing pin and position it at the processing position. A bending system comprising a unit. 2. A vacuum pad for adsorbing a work is attached to the moving unit, and the moving unit is screwed to a ball screw constituting one axis.
2. The bending system according to claim 1, wherein the ball screw and the linear bearing are slidably coupled to the linear bearing, and pass through an opening formed in a lower frame of the bending machine. And (3) a step of supplying one end of the work conveyed by the conveyor means to one of the abutting pins.
(3) a step of adsorbing the work W after contacting one of the abutment pins by the one-axis moving unit to position the work W at a processing position of one end of the work, and (4) a step of bending one end of the work W. (5) after the other end of the work W has passed through the other abutment pin, reversing the conveyor means to bring the other end of the work into contact with the other abutment pin;
(6) a step of adsorbing the work after contact with the other abutment pin by the one-axis moving unit and positioning the work at the processing position of the other end of the work W; (7) bending the other end of the work W A bending method, comprising a step of performing processing.