JP2537682Y2 - Split mold for sheet bending machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a split mold for a sheet material bending machine, and more particularly, to an upper split mold capable of pressing and fixing a sheet material to a lower mold extending in the left-right direction. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split die for a plate material bending machine, which is provided to be vertically movable and has a vertically movable bending die capable of vertically bending an edge of a plate material fixed by upper and lower dies.

[0002]

2. Description of the Related Art Conventionally, in a plate bending machine having the above-described structure, an edge of a plate is bent upward and downward by being clamped between upper and lower dies. A plurality of upper split dies are arranged in parallel so as to be adjustable with respect to the width of the plate material to be handled.

[0003]

By the way, in the above-described split mold of the conventional plate material bending machine, when bending a stainless steel material, for example, when the stainless steel material is bent, adjacent split portions between the upper split molds arranged in the left-right direction are connected. However, there is a problem that the bent surface of the product is flawed due to a slight amount of displacement in the front-rear direction. In particular, when performing R-bending as bending, since the bending is performed gradually, deformation like a bamboo node occurs at the R portion. Accordingly, it is an object of the present invention to provide a split mold for a sheet material bending machine in which upper split molds are prevented from shifting from each other in the front-rear direction.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention vertically moves an upper split mold capable of pressing and fixing a plate material to a lower mold extending in the left-right direction. A splitting die of a plate material bending machine, wherein a bending die capable of vertically bending an edge portion of a plate material fixed by the upper and lower dies is provided. The mold has a configuration in which a plurality of block upper boards are overlapped in the left-right direction, a locking member protruding to one side in the left-right direction is provided on the bottom surface of the plurality of block upper boards, and adjacent to each of the block upper boards. A groove that is engageable with the protrusion of the locking member provided on the upper block of the block is formed and provided, and when the locking member is engaged with the groove, a front-rear direction of the adjacent upper block of the block is provided. This is a configuration for restricting the positional deviation to.

[0005]

According to the above construction, when the locking member of the adjacent block upper plate is engaged with the groove of the adjacent block upper plate, the movement in the front-rear direction is restricted and the integrated structure is formed. There is no longitudinal displacement between the split dies due to the force. Therefore, even if the plate material is bent, the product does not have any flaws or steps.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 4, FIG. 5 and FIG. 6, the plate bending machine 1 is provided with a substantially box-shaped lifting frame 5 at a position above the fixed frame 3 so as to be vertically swingable. In addition, the fixed frame 3 and the elevating frame 5 are connected to side frames 7 erected on the left and right.

More specifically, the fixed frame 3 is roughly box-shaped, and the upper part of a vertical front plate 9 which forms a part of the fixed frame 3 has left and right parts. A lower mold 11 extending in the direction (the left-right direction in FIGS. 4 and 5 and the front-back direction in FIG. 6 toward the paper surface) is appropriately fixed and provided. The lower mold 11 supports the plate material W to be bent upward, downward, and middle bent.

In order to make the lifting frame 5 swingable in the vertical direction, a suitable position is provided at the rear of the lifting frame 5 which is swingably supported on the side frame 7 via the hinge pin 12. As shown in FIG. 6, an elevating cylinder 15 is provided via a roughly clevis-shaped cylinder bracket 13. A piston rod 17 that can freely project downward from the elevating cylinder 15 has a hinge pin 1 attached to the side frame 7.
It is swingably supported via 9.

With the above structure, the lifting frame 5 swings around the hinge pin 12 by operating the lifting cylinder 15 appropriately.

An arm plate 23 is fixedly provided on a suitable number of clevis-like swing brackets 21 provided on the rear lower surface of the lifting frame 5. A holding plate 2 extending in the left-right direction is provided at the tip of these arm plates 23.
5, and an upper split mold 27 for clamping and fixing the plate material supported by the lower mold 11 is provided below the pressing plate 25. The upper split mold 2
Reference numeral 7 extends in the left-right direction.

With the above configuration, the lifting frame 5 is swung up and down around the hinge pin 12 so that
The plate is clamped and fixed between the lower mold 11 and the upper split mold 27, and the fixation is released.

As shown in FIG. 4, the upper split mold 27 includes a plurality of selectable upper boards 29 made of thin plates and a plurality of block upper boards located on both sides of the select upper board 29. 31 and the like, and the length thereof can be appropriately adjusted according to the width of the plate material W.

The above-mentioned selection upper panel 29 and block upper panel 3
The structure for adjusting the length of the upper split mold 27 by selecting the number of 1 can employ a known mechanism if necessary, and the detailed description thereof will be omitted.

In order to bend the edge of the plate material W clamped and fixed by the lower mold 11 and the upper split mold 27 downward, an upper bending mold 33 is formed to have the same length as the lower mold 11 in the left-right direction. It is stretched and provided.

More specifically, as shown in FIGS. 6 and 7, a plurality of swinging brackets 21 support a rotatable first eccentric shaft 35, which is formed on the first eccentric shaft 35. Each of the plurality of eccentric portions 35E supports a swingable upper bending beam 37. Multiple upward bending beams 3
7 (left end in FIG. 6), the upper bending die 33
An upper bending type holder 39 extending in the left-right direction is provided.

The eccentric portion 35E of the first eccentric shaft 35
The upper bending beam 37 is urged rearward at an appropriate position of the upper bending beam 37 in order to bring the minute gap between the upper bending beam 37 and the pivot portion of the upper bending beam 37, for example, backward. Known biasing means 41 is provided.

As can be understood from the above configuration, the upward bending beam 37 is vertically swingable about the eccentric portion 35E of the first eccentric shaft 35. In addition, the upper bending beam 37
Is always pulled rearward and rearward, so that even if an external force acts in the rearward direction, the upward bending beam 37 does not slightly move.

In order to swing the upper bending die holder 39 downward and to bend the edge of the plate material by the upper bending die 33, the lifting frame 5 is attached to the left and right as shown in FIG. A plurality of upper bending cylinders 43 are provided in the directions. More specifically, as shown in FIG. 6, an upper bending cylinder 43 is swingably supported by the elevating frame 5, and a lower end of a piston rod 45 projecting downward from the upper bending cylinder 43 has a lower end. , Is pivotally supported via a pin (not shown) to a bracket 47 attached to the upper bending type holder 39.

With the above configuration, the upper bending die holder 39 can be swung up and down by appropriately operating the upper bending cylinder 43. Therefore, the edge of the plate material W clamped and fixed between the lower mold 11 and the upper split mold 27 can be bent downward by the upper bending mold 33.

As shown in FIG. 4, a bending angle adjusting device 51 for adjusting the stroke of the upward bending cylinder 43 to adjust the bending angle is provided at an appropriate position of the lifting frame 5. Is provided.

A lower bending die 53 extending in the left-right direction is provided below the upper bending die 33 in order to bend the edge portion of the plate material W fixed and fixed upward.

More specifically, a plurality of generally clevis-like fixing brackets 57 are provided on the support plate 55 of the fixing frame 3 as shown in FIGS.
The plurality of fixed brackets 57 support a rotatable second eccentric shaft 59, and the plurality of eccentric portions 59 </ b> E formed on the second eccentric shaft 59 are swingable downward bending beads. 61 is supported. Multiple downward bending beams 61
Is provided with a downward bending die holder 63 having a downward bending die 53 and extending in the left-right direction. Also, bend bead
A known urging means 65 for urging the drum 61 rearward is provided.

In order to swing the lower bending die holder 63 upward and to bend the edge of the plate material W by the lower bending die 53, the supporting plate 55 is suitable for the left and right directions. A number of downward bending cylinders 67 are provided.

More specifically, a downward bending cylinder 67 is slidably supported by the support plate 55, and an upper end of a piston rod 69 projecting upward from the downward bending cylinder 67 is provided with a downward bending die. Bracket 7 attached to holder 63
1 is pivotally supported via a pin 73.

With the above configuration, the lower bending cylinder 67
By appropriately operating, the downward bending type holder 63 is swung up and down, and the edge of the plate material can be bent upward.

The lower bending cylinder 6 is located at an appropriate position.
A bending angle adjusting device (not shown) for adjusting the bending angle by adjusting the stroke of No. 7 is provided.

A middle bending mold 77 composed of a number of continuous divided molds 75 for bending the opening edge of the plate material W clamped and fixed by the lower mold 11 and the upper divided mold 27, for example, upward. Are provided to extend in the vertical direction as shown in FIG.

More specifically, as shown in FIGS. 6 and 7, the fixed bracket 57 has a rotatable third eccentric shaft 79.
And a plurality of eccentric portions 79E formed on the third eccentric shaft 79, each of which can swing freely.
81 is supported. A swing plate 83 provided with a middle bending mold 77 is provided at the front end of the plurality of middle bending beams 81.

The swinging plate 83 is swung upward to bend the opening edge of the plate material W by the middle bending die 77 so that the front frame 9 of the fixed frame 3 is bent. As shown in FIG. 4, a middle bending cylinder 85 is provided in the vertical direction. More specifically, a middle bending cylinder 85 is swingably supported by the front plate 9, and an upper end of a piston rod 87 projecting upward from the middle bending cylinder 85 is a swing plate 83. Pins (not shown) on brackets (not shown) attached to the lower surface of the
Is pivoted through.

With the above configuration, by appropriately operating the middle bending cylinder 85, the swinging plate 83 swings up and down, and the opening edge of the plate W can be bent upward.

As shown in FIG. 4, at an appropriate position of the front plate 9, a bending angle adjusting device 89 for adjusting the stroke of the middle bending cylinder 85 to adjust the bending angle is provided. It is provided.

As described above, when the edge of the plate W is bent upward or downward, or when the opening edge of the plate W is bent upward, the upward bending beam 37 and the downward bending beam are used. 6
1, a clearance adjusting device 91 is provided to move the swing center of the middle bending beam 81 back and forth according to the thickness of the plate material W.

More specifically, referring to FIG. 7, the rear portion of the fixed frame 3 (the front portion facing the paper in FIG. 7) has a forward / reverse rotation such as a pulse motor or a servo motor. A possible motor 93 is mounted, and a reduction gear 95 interlocked with the motor 93 via a belt 94 is mounted. The output shaft of the speed reducer 95 is linked to the second eccentric shaft 59 in an interlocked manner. At an appropriate position of the second eccentric shaft 59, first and second drive gears 97 and 99 are fixedly provided. At an appropriate position of the first eccentric shaft 35, a first driven gear 101 meshing with the first drive gear 97 is fixedly provided.
At a suitable position of the third eccentric shaft 79, a second driven gear 103 meshing with the second drive gear 99 is fixedly provided.

Therefore, by appropriately controlling the rotation of the motor 93, the second eccentric shaft 59 is appropriately rotated, and the first and third eccentric shafts 35 and 79 are appropriately rotated in conjunction with the rotation. It will be. That is, the eccentric portions 35E, 59E, and 79E of the first, second, and third eccentric shafts can be simultaneously moved back and forth, and the upper bending beam 37 and the lower bending beam 6 can be moved.
1. The middle bending beam 81 can be moved back and forth simultaneously.

According to the present embodiment, the lower mold 11 and the upper split mold 2 in a state where the plate material W is clamped and fixed.
The spacing between the upper bending die 33, the lower bending die 53, and the middle bending die 77 can be simultaneously adjusted according to the thickness of the plate material W. Further, after the bending of the plate material W, the motor 93
Is operated to move the upper bending beam 37 and the lower bending beam 61 forward, whereby the edge of the plate material W can be bent at an acute angle to correct the springback.

The upper split mold 27 will be described in more detail.

Referring to FIGS. 1 to 3, a plurality of block upper boards 31 provided in the upper split mold 27 are provided with a plate material W to be handled.
And a plurality thereof are superposed in the left-right direction according to the width of the plate.
For example, a key 107 as a locking member 105 is mounted on the bottom surface of the parallel contact surface such as the adjacent upper block 31a and the lower block 31b of the block and the upper block 31b and the upper block 31c of the block. The key 1 which is the locking member 105
Reference numeral 07 is fixed to the block upper plate 31 with screws 109. One end of the key 107 projecting to the side is engaged in a key groove 111 provided on the bottom surface of the upper block 31 of the counterpart block.

According to the above-described configuration, the adjacent upper blocks 31 of the blocks are restricted by the keys 107 as the locking members 105 from moving in the front-rear direction and are integrally formed, so that no displacement occurs. For this reason, the upper block 3 of each adjacent block
The one end portion 31T does not have a step without being shifted back and forth.

As described above, the plate material W clamped and fixed between the lower mold 11 and the upper split mold 27 is bent downward by the upper bending die 33 (also referred to as reverse bending), and the lower bending die is bent. At 53, upward bending (also referred to as forward bending) for bending upward is performed. The upper divided dies 11 are arranged in parallel in accordance with the width of the plate material W, and the locking members 105 are interposed between the upper divided dies 27 arranged in parallel to be integrally formed. For this reason, the upper split mold 27 does not shift in the front-rear direction due to the component force in the front-rear direction at the time of bending, and the bent plate material W does not have scratches or steps, and the quality of the quality is improved. Improvement can be achieved.

The present invention is not limited to the above-described embodiment, but can be implemented in other forms by making appropriate changes. For example, in the present embodiment, the block upper plate 31 which is the upper split mold 27 has been described, but the present invention can be applied to both the selective upper plate 29 and the middle bending die 77.

[0042]

As will be understood from the above description of the embodiment, in short, the present invention is capable of pressing and fixing the plate (W) to the lower mold (11) extending in the left-right direction. An upper split mold (27) is provided so as to be vertically movable, and a bending mold capable of vertically bending an edge of a plate (W) fixed by the upper and lower molds (11, 27) is made movable vertically. In the split die of the plate material bending machine provided, the upper split die (27) has a configuration in which a plurality of block upper boards (31) are overlapped in the left-right direction, and the plurality of block upper boards (31) are provided. ), A locking member (105) protruding to one side in the left-right direction is provided on the bottom surface, and each block upper panel (31) is provided.
A groove (111) which can be engaged with a projection of the locking member (105) provided on the adjacent block upper plate (31), and the locking member (105) is provided in the groove (111). )
When it is engaged with the upper block of the adjacent block (3
This is configured to restrict the displacement in the front-rear direction of 1).

Accordingly, even if a component force in the front-rear direction at the time of bending is applied, the upper blocks of adjacent blocks do not shift in the front-rear direction, and the conventional problem described above. Can be eliminated.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of the present invention, taken along the arrow I in FIG.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a bottom view in FIG. I;

FIG. 4 is a front view of a plate bending machine according to an embodiment of the present invention.

FIG. 5 is a plan view of FIG.

FIG. 6 is a sectional view taken along the line VI-VI in FIG.

FIG. 7 is a clearance adjusting device in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet material bending machine 11 Lower mold 27 Upper split mold 105 Locking member 107 Key

Claims (1)

(57) [Scope of request for utility model registration] 1. A lower mold (1) extending in the left-right direction.
An upper split mold (27) capable of pressing and fixing a plate (W) to 1) is provided so as to be vertically movable, and the upper and lower molds (11,
27) In a splitting die of a plate material bending machine provided with a bending die capable of vertically bending an edge portion of the plate material (W) fixed by 27), the upper split die (2) is provided.
7) is a configuration in which a plurality of block upper boards (31) are stacked in the left-right direction, and a locking member (105) protruding to one side in the left-right direction is provided on the bottom surface of the plurality of block upper boards (31). And a groove (111) that is engageable with a protruding portion of the locking member (105) provided on an adjacent block upper plate (31) is provided on each of the block upper plates (31). A plate material bending process characterized in that when the stop member (105) is engaged with the groove (111), a positional displacement of the adjacent block upper plate (31) in the front-rear direction is restricted. Machine split mold.