JP2824867B2 - Bending machine butting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a butting device for determining a bending length of a work by a bending machine, and folds a work longer than the width of the bending machine. The present invention relates to an abutment device that can be bent to a position such that the bending length is determined by contacting a work plate material inside a frame erected on both sides of a machine main body and also positioning a work plate material extending outside the frame. .

[Prior Art] In a normal press brake, a pair of side frames (hereinafter, simply referred to as frames) are erected on the left and right sides, an apron is provided in front of the frame, and a bed is fixed to the upper part of the apron and provided on the frame. Drive the main cylinder to raise and lower the ram. The upper die is attached to the lower end of the ram, and the lower die is attached to the bed, and the work plate is bent between the upper die and the lower die by the downward pressurization of the ram.

In order to keep the bending width of the work constant, a striking mechanism for striking and positioning the bending length of the work plate is provided at the rear side of the bed. This butting mechanism is
Plural pieces are arranged side by side on the inside of the frame at intervals, and advance and retreat toward a bending line by a driving mechanism such as a cylinder or a screw.

[Problems to be Solved by the Invention] In a press brake, both ends of the upper and lower molds are made to protrude to the outside of the frame to increase the maximum bending length. However, since the abutment mechanism is arranged inside the space between the frames, it can be accurately abutted and positioned for a work shorter than the interframe distance, but it is longer than the width of the bending machine. In addition, it is not possible to position a work plate in which the work end protrudes outside the frame. If bending is performed without accurately positioning a portion that protrudes outward, this portion may be displaced and bending accuracy may be reduced.

The present invention, when bending a work longer than the machine width of the bending machine, while positioning the bending length by contacting the end of the work plate material inside the frame erected on both sides of the machine body, An object of the present invention is to provide a butting device that can be positioned even with respect to a work plate extending outside the frame.

Means for Solving the Problems In order to achieve the above object, the present invention provides a bracket provided inside a pair of left and right frames and movably in a horizontal direction orthogonal to a bed behind the bed. In a bending machine provided with a plurality of abutting mechanisms to abut and position a bending length of a work plate material inside a frame; a pair of right and left mountings horizontally in a direction orthogonal to a bed behind a bed corresponding to both outsides of the frame. Abutment members are provided for fixing the material, moving toward the bending position on the mounting material, and abutting and positioning the bent length of the work plate material on the outside of the frame, and furthermore, at both ends of the bracket. Following means for causing the abutment member to follow the movement of the abutment mechanism; and the abutment member is mounted on the upper surface of the mounting member so as to be able to advance and retreat toward the bending position. And a pair of left and right abutting pieces provided on the upper side of the slide member and capable of coming into contact with a work plate extending outside the frame.

The follower means includes a drive arm provided at both ends of the bracket, and an operating plate provided at the front end of the slide member and abutting on the tip of the drive arm.

Each of the slide members includes a base portion that engages with a guide rail provided on the upper surface of the mounting member, a plate portion fixed to an upper portion of the base portion, an operating plate fixed to a lower end of the base portion, and a slide. It is formed of a spring stretched between the mounting member and the base portion so that the member is always retracted to the standby position. The plate portion has an elevating mechanism for supporting the abutting piece so as to be able to move up and down.

[Operation] The work plate material shorter than the inter-frame distance is usually placed on the center of the bed or inside both frames, and the abutting mechanism is advanced toward the bending processing position to abut and position the bent length of the work plate material. Thereafter, the ram is driven to perform bending at a predetermined angle by the upper and lower dies. In this case, the length of the abutting mechanism is set to be larger than that of the abutting member, so that the drive arm does not abut the operating plate on the slide member side even if the bracket supporting the abutting mechanism moves forward. The butting member is retracted to the standby position by the elastic force of the spring.

If the length of the work is longer than the width of the bending machine and the end of the work protrudes outside the frame, adjust the length of the abutment mechanism to be the same as the length of the abutment member. The contact mechanism is advanced toward the bending position. As the bracket supporting the butting mechanism advances, the drive arm comes into contact with the operating plate on the slide member side and moves further, and the slide member moves forward toward the bending position in synchronization with the butting mechanism.

By continuing the advance, the work plate portion within the frame is positioned by the abutment mechanism, and the work plate portion protruding outside the frame is positioned by the abutment of the abutment member. When the bending length of the work plate is struck and positioned in this way, the ram is driven and the bracket supporting the striking mechanism is retracted simultaneously with or after opening the mold using a predetermined angle bending process by the upper and lower dies. ,
The butting member is retracted to the standby position by the elastic force of the spring.

EXAMPLES Next, the present invention will be specifically described with reference to the drawings.

FIG. 1 is a front view of a bending machine provided with the abutment device of the present invention, FIG. 2 is an enlarged plan view of an abutment mechanism and an abutment member,
FIG. 3 is a side view of FIG. 2, and FIG. 4 is a rear view of the same. In the figure, reference numeral 1 denotes a pair of left and right frames erected on both sides of the folding machine main body, 1a denotes an apron connecting the frames 1 and 1,
2 is a bed provided on the upper part of the apron 1a, 3 is a lower mold arranged on the upper surface of the bed, 4 is a ram which is raised and lowered by the main cylinder 5, 6 is an upper mold attached to a lower end of the ram 4, 7 is a frame 1 and 1 A plurality of abutting mechanisms, 8 arranged inside, are abutting members arranged outside the frame.

As shown in FIG. 2, a bracket 26 parallel to the bed is provided inside the frames 1 and 1, and a gap is provided on the bracket 26 so that the bent length of the work plate portion inside the frame is abutted and positioned. Abutment mechanisms 8 and 8 are provided.

The bracket 26 is connected to a driving mechanism (not shown) such as a cylinder and a screw provided in the frame 1 and is directed to a processing position (a bending line) of the bending machine by the driving mechanism.
That is, the bed can be moved forward and backward in a horizontal direction orthogonal to the bed 2 behind the bed. At the rear of the bed on both outer sides of the frames 1 and 1, abutment members 8 that can abut a work plate portion extending outside the frame are attached. Follower means 19 for following the movement of the robot is attached.

As shown in FIG. 1, the abutment member 8 is mounted on the outside of the frame 1 of the bending machine in a pair of right and left. However, since the structure and operation of the left and right are the same, when viewed from the front of the bending machine. The right side will be described.

That is, as shown in FIGS. 2 to 4, the mounting bracket 10 is inserted into a groove 9 formed in the longitudinal direction of the rear surface of the bed.
And the fixing member 11 is fixed so as to be orthogonal to the bed 2. A guide rail 12 is laid on the upper surface of the mounting member 11 in the longitudinal direction, and a slide member 13 is disposed on the guide rail 12.

Each of the slide members 13 includes a base portion 13a that engages with the guide rail 12 on the upper surface of the mounting member 11 via the LM guide 14, a plate portion 13b fixed on the base portion 13a, and a base portion 13a.
L-shaped operating plate 20 fixed to the lower end of a with bolts 21
And a spring 24 stretched between a pin 23 on the mounting member 11 and a pin 22 on the base 13a in order to always retract the slide member 13 to the standby position. The plate portion 13b has an elevating mechanism for supporting the abutting piece 15 so as to be able to move up and down, as described later.

Further, the follow-up means 19, 19, when the work plate material is larger than the inter-frame distance and the end protrudes outside the frame 1, to make the abutment pieces 15, 15 follow the movement of the abutment mechanisms 7, 7. Drive arms 25, 25 provided at both ends of a bracket 26, and an L-shaped operating plate 2 provided at the front end of the slide members 13, 13 and in contact with the tips of the drive arms 25, 25.
It consists of 0,20.

As shown in FIGS. 2 and 3, the lifting mechanism for raising and lowering the abutting member 15 is provided on a support member 18 provided on the plate portion 13b for supporting the abutting member 15, and on the upper surface of the plate portion 13b. Lift switching cylinder 31, stopper 30,
The lifting cylinder 16 is provided. The sign
Reference numeral 28 denotes a protective cover fixed with a front end upper bolt 29 of the slide member 13. The stopper 30 is provided to enter the lower surface of the abutting piece 15 when the abutting piece 15 is raised to prevent the abutting piece 15 from dropping, and is connected to the piston rod 32 of the lift switching cylinder 31.

 Next, the operation of the above device will be described.

When the work inserted into the processing position (bending line) of the bending machine fits inside the frame, the abutment device abuts only on the abutment mechanism 7. In the case of a work longer than the inter-frame distance, a portion of the work that fits inside the frame abuts against the abutting mechanism 7 and a portion that protrudes outside the frame follows the movement of the abutting mechanism 7. Contact.

More specifically, the work plate material shorter than the inter-frame distance is usually placed on the center of the bed 2 or inside the two frames 1, and the abutting mechanism 7 is advanced toward the bending processing position so that the bending length of the work plate material is reduced. Then, the ram 4 is driven and the upper and lower dies 6 and 3 perform bending at a predetermined angle.

At this time, the length of the butting mechanism 7 up to the butting surface 7a is
The length of the abutment piece 15 should be larger than the length of the abutment piece 15, and the bracket 2 should be used until the abutment surface 15 a of the abutment mechanism 7 abuts against the work end.
Even if 6 advances, the drive arm 25 does not come into contact with the operation plate 20 on the slide member 26 side.
With the elasticity of 24, it stays retracted to the standby position.

When the work end is longer than the width of the bending machine and the end of the work protrudes outside the frame 1, as shown in FIG. The length of the contact piece 15 is adjusted to the same length, and the butting mechanism 7 is advanced toward the bending position as before. When the drive arm 25 comes into contact with the operating plate 20 on the slide member side and moves further with the advance of the bracket 26 supporting the butting mechanism 7, the sliding member 13 resists the tension of the spring 24, Advances toward the bending position in synchronization with

By continuing to move the bracket 26 forward, the work plate portion within the frame is positioned by the abutment mechanism 7, and the work plate portion protruding outside the frame is positioned by the abutment piece 15 of the abutment member. That is, the abutment surface 15a and the abutment mechanism 7 inside the side frame
Stop with the abutment surface 7a on the same line.
Figure). In this manner, the bending length of the work plate is abutted and positioned, the ram 4 is driven to perform a bending process at a predetermined angle by the upper and lower dies, and simultaneously with or after the mold opening, the bracket 26 supporting the abutting mechanism is retracted. Then, the butting member 8
Is retracted to the standby position by the elasticity of the spring 24.

[Effects of the Invention] As described above, according to the present invention, in the case of a work plate material shorter than the inter-frame distance, the bending length is abutted and positioned by the abutting mechanism inside the frame to bend at a predetermined angle. It can be performed. Further, when the work end is longer than the width of the bending machine and the work end protrudes outside the frame, the abutting member on the outside of the frame is moved in conjunction with the movement of the abutting mechanism disposed inside the frame. Thus, it is possible to prevent a long work plate material from being displaced and perform highly accurate bending.

Moreover, if the apparatus according to the present invention is used, the entire processing position of the bending machine can be utilized. For example, if the processing position is divided into a plurality of zones and different upper dies and lower dies are attached, one folding machine can be used. A plurality of bending processes with different bending angles can be performed by a bending machine, and it is also possible to process a short material at a machine end outside a frame.

[Brief description of the drawings]

FIG. 1 is a front view of a bending machine equipped with the butting device of the present invention,
FIG. 2 is an enlarged plan view of an abutting mechanism and an abutting member, and FIG.
The figure is a side view of FIG. 2, and FIG. 4 is a rear view of the same. 1 ... side frame, 1a ... apron, 2 ... bed, 3 ... lower mold, 4 ... ram, 5 ... main cylinder, 6 ... upper mold, 7 ... butting mechanism, 7a ... protruding Abutment surface, 8 ... abutment member, 9 ... groove, 10 ...
Mounting bracket, 11 Mounting material, 12 Guide rail, 13 Slide member, 13a Base, 13b Plate, 14 LM guide,
15 abutment piece, 15a abutment surface, 16 elevating cylinder, 17 piston rod, 18 support member, 19 follow-up means, 20 operating plate, 21
... Bolt, 22,23 ... Pin, 24 ... Spring, 25 ... Drive arm, 26 ... Bracket, 27 ... Joint plate, 28 ... Protective cover, 29 ...
Bolt, 30 ... Stopper, 31 ... Lift switching cylinder, 32 ... Piston rod.

Claims (2)

(57) [Claims] A bracket (26) is provided inside a pair of left and right frames (1, 1) and movably in a horizontal direction perpendicular to a bed (2) behind the bed. Of the frame (1, 7)
In the bending machine that abuts and positions the bending length of the work plate material inside 1); a pair of right and left mountings horizontally in the direction orthogonal to the bed (2) behind the bed on both sides of the frame (1,1) Lumber (11,
11) is fixed to the mounting member (11, 11), and is movable toward the bending position, and abutting members (abutting members) for abutting and positioning the bending length of the work plate material outside the frame (1, 1). 8, 8), and the bracket (26)
Abutment members (8, 8) at both ends of the abutment mechanism (7, 7)
Following means (19, 19) for following the movement of the object; the abutment members (8, 8) are mounted on the upper surface of the mounting material (11, 11) so as to be able to advance and retreat toward the bending position. , And a slide member (13, 13) with a tendency to always retract
And a pair of left and right abutting pieces (15, 15) provided above the slide members (13, 13) and capable of contacting a work plate material extending outside the frame. Butting device. The following means (19, 19) are provided with drive arms (25, 25) provided at both ends of a bracket (26) and a drive arm (25) provided at a front end of a slide member (13, 13). ,
25) and an operating plate (20, 20) that comes into contact with each other; each slide member (13) is a base portion (13a) that engages with a guide rail (12) provided on the upper surface of the mounting member (11). ), A plate portion (13b) fixed to an upper portion of the base portion (13a), and an operating plate (20) fixed to a lower end of the base portion (13a).
The plate member (13b) is formed of a spring (24) stretched between the mounting member (11) and the base portion (13a) to always retract the slide member to the standby position.
2. The abutment device for a bending machine according to claim 1, wherein the abutment device has an elevating mechanism for supporting the abutment piece (15) so as to be able to move up and down.