JPH10263709A - Die width adjustment divice in bending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely move a split die by jumping up a split die selection treatment means from an action position of movement of a split die to a position not intefereing with a bent piece of a plate to move an engaging member in the moving direction of the split die with a simple constitution. SOLUTION: A split die selection treatment means 31 pushes a thick split die 18 in the width direction to be moved to a center die. A selection treatment means jump mechanism 33 jumps up the split die selection treatment means 31 from an action position V to a non-action position R. The selection treatment means jump mechanism 33 has a sector gear 50 arranged to a die arrangement slide body 37, a first arm 51 fixed to a rotating shaft of the sector gear 50 and a second arm 52 connected to the first arm 51 through a turning shaft 53. An air cylinder 54 for an actuator of an engaging member 48 is arranged to a tip of the second arm 52. Also, a jump up action of the split die selection treatment means 31 and a jump up action of an end part die is reversed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die width adjusting device for a bending machine, for example, a folding machine, a press brake, etc., which can change a die width in accordance with a bending width of a plate material.

[0002]

2. Description of the Related Art In cabinets and the like of electric equipment and various other products, a rectangular plate obtained by bending four sides into a U shape or a Z shape is used. In order to bend the plate material in this manner, usually, after bending the short side edge portion of the plate material cut to a predetermined size, the plate material is turned in a plane to bend the long side edge portion. When bending the long side edge, there is a rising edge of the short side edge that has already been bent. Therefore, when the plate material dimensions are changed, the width of the upper die does not interfere with the rising piece. Need to be adjusted.

Conventionally, as a die width adjusting device for automatically adjusting the die width of the upper die, the upper die is constituted by a number of split dies arranged in the die width direction, and an arbitrary number of split dies are used. Various proposals have been made for selecting and arranging them at use positions. For example, an upper mold, a central mold, a divided mold arranged on both sides of the central mold, and a pair of end portions sandwiching the central mold and the divided mold from both sides by symmetrically moving with respect to the center of the machine. The width of the mold is adjusted by dividing the mold into a required number of molds and moving only the required number of divided molds toward the center mold. The end type can be flipped up by an end type lifting mechanism so as not to hinder the slide movement of the split type.

[0004]

The conventional mold width adjusting devices of this type have problems in various aspects such as complicated control and limitation on the minimum plate material size that can be processed. Therefore, a mold width adjusting device in which each part is improved, such as a mechanism for selecting a split mold, has been tried. As a result, the problems of improved controllability and the minimum plate material size that can be processed were solved. However, there are still unsolved problems in making the machine compact. That is, as a means for selecting the split mold, when selecting the split mold, it is in front of the upper mold and engages with the split mold of the upper mold. When not used for selection, the bent formed on the plate material is used. So that the piece does not interfere when inserting and removing the plate material between the upper and lower molds.
The one that jumps up the split type selection processing means was proposed. However, in the configuration of this proposal, apart from the end type lifting mechanism,
Since there is a mechanism for jumping up the split mold selection processing means, and each mechanism requires an actuator, there has been a problem that the overall configuration of the mold width adjusting device becomes large and the cost increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mold width adjusting device for a folding machine which can solve such problems and is compact and can reduce the cost.

[0006]

A mold width adjusting device in a bending machine according to the present invention comprises an upper mold comprising a central mold, a plurality of divided molds, and an end mold which are sequentially arranged in the mold width direction. is there. The end type is divided type selection processing means for selecting and moving a predetermined number of split types, an end type jumping mechanism for flipping up the end type, and the split type selection processing means for moving the split type selection processing means. A selecting means jumping mechanism for jumping up from a possible operating position to a non-operating position which does not interfere with the bent piece of the plate material. The two lifting mechanisms are configured to perform a lifting operation by a common actuator. According to this configuration, the split type selection processing means performs split type movement in a state where the split type selection processing unit is in the operation position,
At the time of processing or when inserting a plate material below the upper die, the plate is raised up to the non-operating position by the selection processing unit raising mechanism. When moving the split mold, the end type lifting mechanism
Raise the split mold so as not to hinder the movement. In this case, the both lifting mechanisms are raised by a common actuator. Therefore, it becomes more compact than providing an actuator separately for each lifting mechanism, and the cost can be reduced.

[0007] In the above structure, a gap forming means for forming a gap between the split dies which are in contact with each other is provided, and the split type selection processing means is configured to advance near the action position,
It may be connected to a drive transmission system of the gap forming means. According to this configuration, when the split molds are arranged side by side, even if they are in close contact with each other with oil or the like, they are reliably separated before the selection of the split mold. Therefore, at the time of selection by the division type selection processing means, it is possible to avoid that selection is impossible due to close contact between the division types. Further, since the split type selection processing means is connected to the drive transmission system of the gap forming means, the power of the actuator of the gap forming means can be used. Therefore, even in the split type approach from near the action position of the split type selection means,
There is no need to provide a special drive source, it is compact,
Can be manufactured at low cost. In addition, the timing adjustment from the formation of the gap to the entry into the division can be naturally performed without the need for a control means such as an electric system. The split mold selection processing means may include an engaging member that engages with the split mold in a gap formed between the split molds, and an actuator that moves the engaging member in a moving direction of the split mold. Is also good.
In the case of this configuration, since the engaging member can be moved in the moving direction of the split mold, the split mold can be reliably moved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. As shown in the side view in FIG.
The bending machine main body 1 of this bending machine includes an upper mold 2 and a lower mold 3 sandwiching the plate material W up and down, and a portion protruding from the upper and lower molds 2 and 3 of the plate material W bent upward or downward to form a bent piece W1. And a bending die 4. The lower mold 3 is fixed to the main body frame 5. The upper die 2 is provided with a die width adjusting device base (hereinafter referred to as “A
TC base ". ) 6 and is attached to the ram 7 via the elevating cylinder 8 and driven up and down together with the ram 7. The bending die 4 is attached to the tip of the rocker arm 9. The rocker arm 9 is supported so as to be vertically swingable about an eccentric support shaft 10, and is vertically rocked by a vertical drive cylinder and a rotation cylinder of the eccentric support shaft 10 (both not shown). A slight vertical movement and a front-back movement are possible. The upper die 2 has a die width adjustable by a die width adjusting device 11.

A manipulator 12 is provided in front of the folding machine main body 1 so as to advance and retreat in a direction perpendicular to the upper mold 2 and supply the plate material W below the upper mold 2. The manipulator 12 includes a rotary clamp 13 for holding the center of the plate material W between upper and lower rotary pads. The rotating clamp 13 is a plate material W
Is rotated in a horizontal plane.
(FIG. 1) It is provided on a carriage 15 which is driven forward and backward on the upper side. On both sides of the forward and backward movement path of the carriage 15, work tables 16 on which a plate material W held by the rotary clamp 13 is placed are installed.

The configuration of the mold width adjusting device 11 will be described. FIG.
As shown in FIG. 3, the upper mold 2 has a central mold 17 of an integral member arranged at the center in the mold width direction, a plurality of thick-walled molds 18 arranged on both sides thereof, and further, on both sides thereof. It is divided into a thin-walled split mold 19 to be arranged and end molds 20 at both ends. At the center of the front surface of the center mold 17, FIG.
As shown in a front view and a plan view in FIG. 3C, a notch 17a for escape into which the rotary clamp 13 of the manipulator 12 can enter is provided. The center mold 17 has a guide roller 23 at its upper end, and is suspended on a center mold support rail 22 (FIG. 4) provided on the ATC base 6 of the ram 7 so as to be movable in the mold width direction. The upper surface of the central mold 17 is
As shown in FIG. 14B, it is set at a position lower than the upper surface of the thick-walled split mold 18. Each of the thick-walled split dies 18 is formed to have a thickness of 50 mm in this embodiment. Thin-walled split type 19
Is formed to a thickness of 5 mm, which is 1/10 of that, and 9
And ten on the other side. In addition, central type 1
7 is formed with a thickness of 250 mm, and the end mold 20 is formed with a thickness of 130 mm.

The thick-walled split mold 18 is also shown in FIGS.
As shown in the side view and the front view, each has a guide roller 25 at the upper end, and is movably suspended in the mold width direction on a divided mold support rail 24 (for example, FIG. 6) provided on the ATC base 6 of the ram 7. Is held. A receiving plate 26 having cutouts 26a on both side surfaces is provided on the upper part of the front surface of the thick split body 18, and the cutout 26a is formed by the adjacent thick split mold 18 shown in FIG.
By contacting each other as shown in FIG. 3, an opening 27 that opens downward from these thick-walled split dies 18 is formed.

As shown in FIG. 4, upper mold reset means 28 are provided at symmetrical positions with respect to the mechanical center CL ₀ of the ATC base 6. This upper mold reset means 2
Numeral 8 is for separating all the thick-walled molds 18 from the central mold 17 and resetting them to the left and right origin positions T as shown in FIG. The upper mold resetting means 28 is provided in the center mold 17.
A hook member 29 abutting on a side surface of the thick-walled split die 18 located closer thereto, a rod member 30 provided with the hook member 29 at the tip and extending in the die width direction, and an actuator for moving the rod member 30 in the die width direction And an air cylinder 31 which is The hook member 29 is movable in the width direction of the mold at a height position between the upper surface steps of the central mold 17 and the thick-walled divided mold 18 described above. Reciprocatingly moves between the position where the thick-walled split die 18 is the origin position T,
After resetting the thick-walled split die 18 to the origin position T, it is made to wait at the upper surface position of the central die 17 as shown in FIG. Further, stoppers 21 for positioning the thick-walled split mold 18 to be reset to the origin position T are provided at outer ends of the left and right movement paths of the thick-walled split mold 18, respectively.
By configuring the upper mold reset means 28 in this manner, the upper mold reset means 28 and the thick split mold 18
The upper mold reset means 28 can be easily installed without any intervening connecting means such as an actuator for connecting and disconnecting them and an engaging hole thereof. The upper mold reset means 28
Is configured as described above, the configuration is simplified, and its members are not bulky up and down, so that the movement path of the thick-walled split mold 18 can be prevented from being restricted.

The end mold 20 shown in FIGS. 1 to 3 selects a predetermined number of thick-walled split molds 18 from the thick-walled split molds 18 reset to the origin position T, and shifts them toward the central mold 17. A mold selection processing means 31 (for example, FIG. 8) and an end-type lifting mechanism 32 for flipping up the end mold 20 and the thin-walled split mold 19;
(For example, FIG. 8), and the non-operation position where the division selection processing means 31 does not interfere with the bent piece W1 (FIG. 5) of the plate W from the operation position V (for example, FIG. 8) where the thick dividing die 18 can be moved. R
(For example, FIG. 8), a selection processing means lifting mechanism 33 (for example, FIG. 7), and a gap forming means 34 (FIG. 7) for forming a gap between the thick-walled split dies 18 that are in contact with each other. .

FIGS. 7 to 13 show the constructions of the division type selection processing means 31 and the selection processing means jumping-up mechanism 33. FIG. As shown in FIG. 8, a mold mounting slide 37 is provided on a guide rail 35 provided on the ATC base 6 via a linear motion bearing 36 so as to be able to advance and retreat in the mold width direction.
The mold mounting slide 37 is provided with a feed screw 38 shown in FIG.
The drive screw 38 is connected via a moving shaft (not shown) that is screwed into the drive shaft, and is driven forward and backward by a U-axis servomotor 39 that rotationally drives the feed screw 38. The feed screw 38 is rotatably supported on the ram 7 by a bearing, and is provided on both sides 3 with respect to the center of the mold width.
8a and 38b are formed with reverse screws, and are rotationally driven by a U-axis servo motor 39 via a timing belt 40. As shown in FIG. 2, rotation of the both sides 38 a and 38 b of the feed screw 38 is transmitted through a transmission mechanism 41 installed above the central mold 17. This transmission mechanism 41
The output pulley 42 provided on the left portion 38a of the feed screw 38, the intermediate pulley 43 disposed above the output pulley 42, the timing belt 44 mounted on the pulleys 42 and 43, and the intermediate pulley 43 Another intermediate pulley 45 provided coaxially and the right portion 3 of the feed screw 38
8b, two pulleys 45, 4
6 and another timing belt 47 mounted on the belt. As described above, the left side portion 3 of the feed screw 38 is transmitted through the transmission mechanism 41 which is configured to bypass the position above the central mold 17.
8a is transmitted to the right part 38b, so that the manipulator 12 that advances toward the central mold 17 is rotated.
Can be prevented from interfering with the feed screw 38.

The split mold selecting means 31 is provided outside the end mold 20 in the mold width direction as shown in the plan view and the front view in FIGS.
An engagement member 48 which enters the opening 27 of the main body from below and pushes the thick-walled split mold 18 in the mold width direction to move to the center mold 17 side;
Before the engagement member 48 enters the opening 27, an engagement assisting member 49 for widening the opening width of the opening 27 is provided.
(FIG. 13). The engagement member 48 is a plate-like member that can be brought into contact with the side surface of the receiving plate 26 of the thick split mold 18.

The mold setting slide body 37 is provided with a hydraulic cylinder 55 (for example, FIG. 8) which is provided in the front-rear direction of the upper mold 2 and serves as an actuator of the engagement assisting member 49. The engagement assisting member 49 is a rod that enters the opening 27 of the thick-walled split mold 18 from the front thereof, and is driven forward and backward by the hydraulic cylinder 55. The engagement assisting member 49, the hydraulic cylinder 55, and the like constitute a gap forming unit 34 that forms a gap between the thick-walled split dies 18 that are in contact with each other. The engagement assisting member 49 is shown in FIG.
As shown in FIG. 8, both notches 2 of the adjacent thick-walled split mold 18
The engagement assisting member 49 is formed with a taper 49a having a diameter tapered at the tip of the engagement assisting member 49, while having a diameter slightly larger than the width dimension of the opening 27 formed by 6a. As a result, as the engagement assisting member 49 is inserted into the opening 27 formed by the adjacent thick-walled split molds 18, the adjacent thick-walled split molds 18 are surely guided by the guide of the taper 49 a of the engagement assisting member 49. Separated.

Further, as shown in FIG. 8, a selection processing means jumping mechanism 33 for flipping the split die selection processing means 31 from the operating position V to the non-operating position R includes the die setting slide body 3 as shown in FIG.
7 and the sector gear 50
A first arm 51 fixed to a rotating shaft of the first arm 51 and a second arm 52 connected to the first arm 51 via a turning shaft 53
The engagement member 48 is provided at the tip of the arm 52.
An air cylinder 54 serving as an actuator is provided in the mold width direction. The second arm 52 is biased by a spring in the clockwise direction in FIG. 8 around the pivot shaft 53 so as to maintain a predetermined rotation angle with respect to the first arm 51, and a stopper on the first arm 51 side. (Neither is shown)
Has been pressed against. These first and second arms 5
The arm members 1 and 52 form an arm member that can be elastically bent and returned.

Between the body of the hydraulic cylinder 55 constituting the gap forming means 34 and the piston rod 57,
A link mechanism 60 including an engagement link 58 and a connecting rod 59
Are provided as a drive transmission system on the mold installation slide body 37, and the link mechanism 60
Are swingable back and forth.
The engagement link 58 is formed in an upward V-shape, and a cutout portion thereof serves as an engagement portion 58a, and is supported at a lower portion to be swingable about a horizontal support shaft. The second arm 52 has an engaging portion 58a of the engaging link 58.
Is provided with a pin 61 which can be engaged. This pin 61
When the second arm 52 is at the position where the second arm 52 is flipped up as shown by a chain line in FIG. 12A, the second arm 52 is disengaged from the engagement link 58. 48 is advanced to a pre-operation position U (FIG. 12A) near the operation position V shown in FIG.
1 engages with the engaging portion 58a of the engaging link 58. Thereby, when the engagement assisting member 49 advances, the advance operation is transmitted to the second arm 52 via the link mechanism 60 which is a drive transmission system, and as a result, the second arm 52
Is further rotated against the above-mentioned spring, and the engagement member 48 advances to the operation position V in FIG. A hydraulic cylinder 62 is installed on the die mounting slide 37 in the front-rear direction of the upper die 2, and a piston rod 63 of the hydraulic cylinder 62 is connected to the sector gear 50. As a result, the sector gear 50 is driven to rotate. Hydraulic cylinder 62, sector gear 5
0, the arms 51 and 52, the link mechanism 60 and the like constitute the selection processing means jumping-up mechanism 33. The hydraulic cylinder 62 serves as an actuator of the selection processing means jumping mechanism 33.

As shown in FIG. 10, a hollow flip-up rotary shaft 64 is mounted on the mold mounting slide body 37 as bearings 65 and 66.
And a driven gear 67 is fixed at one end thereof. The driven gear 67 meshes with the sector gear 50 of the selection processing means jumping mechanism 33 (FIG. 8), and is driven by the selection processing means jumping mechanism 33 to drive the rotary shaft 64 for jumping.
Is rotated by a predetermined angle in the forward and reverse directions. That is, when the sector gear 50 rotates 90 °, the driven gear 67 rotates 180 °. As shown in FIG. 10, the upper end of the end mold 20 and each of the thin-walled split molds 19 are rotatably fitted to the jumping rotary shaft 64. These end molds 20 and respective thin-walled split molds 19
Engages with the flip-up rotary shaft 64 via the mold number selection key 68 so as to be capable of transmitting rotation. The mold number selection key 68 can be advanced and retracted by screwing a nut portion 68 a onto a feed screw 69 in the jumping rotary shaft 64. The key portion 68 b is a key moving slit 70 of the jumping rotary shaft 64. To engage with the key grooves of the end mold 20 and each of the thin-walled split molds 19. The feed screw 69 is rotatably supported in the rotary shaft 64 for lifting by a bearing 71, and is connected via a shaft coupling 73 to a thin-walled split type selecting motor 72 installed on the die mounting slide 37.

Therefore, the thin split type selection motor 72
Is rotated to move the die number selection key 68 forward and backward, thereby selecting the number of thin-walled split molds 19 to be engaged with the key 68. The engaged thin-walled split mold 19 and the end mold 20 are moved by 180 ° between the use position P and the jumping position Q (for example, FIG. 3) by the drive of the selection processing unit jumping mechanism 33.
The inversion operation is performed. The lead of the feed screw 69 is set to such a size that the mold number selection key 68 moves by one thickness of the thin-walled split mold 19 in one rotation. Therefore, one rotation of the thin-walled split type selecting motor 72 allows one thin-walled split type 19 to be selected. The end mold 20 and the thin-walled split mold 19 are formed by these configurations, the sector gear 50 of the selection processing means jumping mechanism 33, the hydraulic cylinder 62, and the like.
An end-type jumping mechanism 32 for jumping up is constructed. The hydraulic cylinder 62 serves as an actuator common to the selection processing means jumping mechanism 33 and the end type jumping mechanism 32.
In addition, the split type selection processing means 31 by the hydraulic cylinder 62
The flip-up operation of the end die 20 and the flip-up operation of the end mold 20 are turned upside down. When the end mold 20 is flipped up, the split mold selection processing means 31 moves the lowering position (action) shown in FIG. It becomes the front position U).

FIG. 11 shows a thin-walled split mold 19 at the jumping position Q.
Shows a jumping-up position holding mechanism 74 for holding the robot so as not to rotate by its own weight or the like. The jumping-up position holding mechanism 74 holds the thin-walled split mold 19 in a rotation-blocking state by engaging a plate-shaped stopper 76 with a locking recess 75 formed in the thin-walled split mold 19. As shown in FIG. 10, this stopper 76 is linked with the number-of-molds selection key 68 by an interlocking mechanism 78 having a belt 77. Also moves the same amount.
That is, if the mold number selection key 68 does not select the thin-walled split mold 19 at all, the stopper 76
9 is held, and the mold number selection key 68 is
Is selected, the stopper 76 does not hold all the thin-walled split molds 19, and the thin-walled split molds 19 can be rotated.

In FIGS. 1 to 3, reference numeral 80 denotes a flexible grooved cable guide member connected to the mold setting slide 37, and reference numeral 81 denotes a support thereof.

A description will be given of the mold width adjusting operation having the above configuration. FIG.
FIG. 5 is a pattern diagram of the die width adjustment state. FIG. 7A shows a state where the mold width L is the longest. When changing the die width in units of 100 mm, only the selection of the thick-walled split die 18 is performed as shown in FIG. When changing in units of 10 mm, the number of sheets of the thick-walled split mold 18 and the thin-walled split mold 19 is selected as shown in FIG. When performing in units of 5 mm, the thin-walled split mold 1 using the right and left thin-walled split molds 19 on the right side as shown in FIG.
9 is different from that of the thin-walled split mold 19 used on the right side.
Just increase the number of sheets). At this time, the center CL _{1 of the} central mold 17
Means that the thickness of the thin-walled split mold 19 is one half (2.5 mm) of the thickness of one thin-walled split mold 19 from the machine center CL _o.
The position is biased to the right with fewer sheets. (E) shows the mold width L.
Indicates the minimum state.

FIG. 19 shows a flowchart of the mold width adjusting operation. The example of the die width adjustment operation in FIGS. 16 and 17 will be described with reference to FIG. In this example, from the longest width (3100 mm) to 625
The operation of reducing the mold width L to the width of mm is shown. In the state of FIG. 16A in which the upper mold 2 is used, the hook member 29 of the upper mold reset means 28 has a slight gap d between it and the thick-walled split mold 18 closest to the center mold 17. In order to be able to do so, it is made to wait at a position closer to the center mold 17 than the side face of the thick-walled split mold 18. From the state of the longest width in FIG.
First, the ram 7 (FIGS. 1 and 5) is raised (step S).
1) The end mold 20 and all the thin-walled split molds 19 are flipped up (S2). This bouncing is performed via the driven gear 67 by rotating the sector gear 50 by the shortening operation of the cylinder 62 in FIG.
By this rotation, the split type selection processing means 31 moves down to the position shown by the solid line in FIG. At this time, the gap forming means 34 is
9A is retracted, and the engagement member 48 of the split type selection processing means 31 is at the pre-use position U. This state is the state shown in FIG. Here, the upper mold reset means 28 is driven (S3), and all the used thick-walled split molds 18 are moved to the outer origin position T by the hook members 29 (FIG. 16C). After this reset operation, the hook member 29 returns to the standby position on the upper surface of the central mold 17.

[0025] Thereafter, by rotating the screw 38 feeding by the driving of the U-axis servomotor 39, the moving axis of the mold installation slide body 37 (U axis) in the side (machine center CL ₀ side) or to the desired position on the out-side It is moved (S4). In other words, go to the next thick-walled split mold 18 to be used. This state is the state shown in FIG. Note that step S3 in FIG.
In, when the all-thick split mold 18 is reset,
The end mold 20 waits in place. Accordingly, when the width is smaller than the previous mold width, the U-axis is moved to the in side in step S4 as described above.
Move the axis to the out side. After this U-axis movement, the gap forming means 34 is driven (S5), and the engagement assisting member 49
Are divided into adjacent thick-walled split molds 18, 18 as shown in FIG.
Into the opening 27 formed between the
Widen the opening width. Along with this operation, the engaging member 48 of the split mold selection processing means 31 enters the opening 27 (S
6). In this state, by driving the air cylinder 54 of the split mold selection processing means 31 (S7), the desired number (here, one) of the thick split mold 18 is moved to the central mold 17 side (see FIG. )).

Thereafter, the air cylinder 54 is driven to retract the engaging member 48, and then, as shown in FIG. 17A, the engaging auxiliary member 49 is moved from the state shown in FIG. 12B to the state shown in FIG. (S8). Along with this, the engaging member 48 comes off from the receiving plate 26 of the split mold 18 downward (S9). next,
Key 68 for selecting the number of molds of the end mold lifting mechanism 32 (FIG. 10)
Is moved to select the thin-walled split mold 19 (S10).
Here, it is assumed that the number of used thin-walled split molds 19 on the left is two, and the number of used thin-walled split molds 19 on the right is one. Then
A mold descending permission signal obtained from predetermined sensors (not shown) is confirmed (S11), and the end mold 20 and the selected thin-walled mold 19 are selected by extending the hydraulic cylinder 62 (FIG. 12).
Are rotated downward to the use position P (S12). With the downward rotation due to the extension of the hydraulic cylinder 62, the split-type selection processing means 31 is flipped up together with the second arm 52 to the non-operation position R indicated by a chain line in FIG.
When carrying in and out between the upper and lower dies 2 and 3, the bent piece W1 of the plate material W is prevented from interfering with the split type selection processing means 31. Note that the division selection processing means 31 is configured so that a slight gap g (for example, about 10 mm) is obtained between the thin-walled split mold 19 and the thick-walled split mold 18 (or the central mold 17) that have fallen at this time. The U-axis coordinates of the stroke of the air cylinder 54 and the origin position T of the thick parting die 18 are determined. Thereby, on the left side, the thin split mold 19 and the central mold 17
And a gap (g + 5 mm) is obtained between the thin-walled split mold 19 and the central mold 17 on the right side. As described above, after the molds 19 and 20 are rotated downward, FIG.
As described above, the left and right mold installation slides 37 are slightly symmetrically moved inward to eliminate the gap (S13), and the target mold width L is obtained. At this time, the center mold 17 has its center CL ₁
Moves from the machine center CL ₀ to a position deviated to the left by a half (2.5 mm) of the thickness (5 mm) of the thin-walled split mold 19. Thus, the die width adjustment in units of 5 mm is completed.

[0027] In the mold width adjustment of the 5mm units, the central die 17 is biased in the mold width direction by 2.5mm from the machine center CL _0. On the other hand, if you do not adjust the mold width in 5mm units,
That is, when the selection number of the thin split 19 and the left and right equal, the central die 17 coincides with the machine center CL _0. The position of the central mold 17 is slightly shifted left and right depending on whether or not the adjustment is performed in units of 5 mm, and the position of the thick-walled split mold 18 is accordingly shifted. The member 29 has a slight gap d between it and the thick-walled split mold 18 closest to the center mold 17.
Further, since the standby is made closer to the central mold 17, even if the molds 17 and 18 are misaligned, the hook member 29 does not interfere with the thick-walled split mold 18, and the subsequent reset operation can be performed reliably. Can be.

In consideration of the displacement of the center mold 17, the opening width dimension A of the escape notch 17a of the center mold 17 is set as shown by a chain line in FIG.
(D + 10) mm or less, which is the sum of the external dimensions D of the rotary clamp 13 which is the work gripping part of the manipulator 12 and the thickness of the two thin-walled split molds 19, and the thin-walled split type from the external dimensions D It is set to a size (D + 5) mm or more, which is obtained by adding a thickness of 5 mm for one of the 19 sheets. This allows
Also centralized 17 in mold width adjustment of 5mm units varying only one selected number of left and right thin split 19 is biased 2.5mm from machine center CL _0, without being influenced by this, the rotation of the manipulator 12 The clamp 13 can be advanced to the escape notch 17a without interfering with the central mold 17. As a result, even if the plate material W has a short protrusion shape or the like with a short protruding dimension protruding from the gripping portion gripped by the rotary clamp 13 to the front end, the bending process can be easily performed.

As described above, the mold width adjusting device 11 of this embodiment is configured such that the upper mold 2 is divided into a central mold 17 and a plurality of divided molds 1 of the same width arranged on at least one of the central molds 17.
8 and 19, and an end mold 20. An upper mold reset means 28 is provided for resetting all of the split molds 18 to the origin position apart from the central mold 17, and the end mold 20 has a predetermined position at the origin position. Since the division type selection processing means 31 for selecting the number of division dies 18 and approaching the center die 17 is provided, there is no shift in the standby position of the division type 18 to be selected, and control of division type selection is simple and easy. Can be done accurately. The end type jumping mechanism 32 for flipping the end die 20 and the selection processing means jumping mechanism 33 for flipping the split type selection processing means 31 for selecting the split die 18 to the non-operating position R are common. Since the hydraulic cylinder 62 is used, the number of actuators is reduced, the configuration is compact, and the cost can be reduced. Further, a gap forming means 34 for forming a gap between the split dies 18 which are in contact with each other is provided, and the pin 61 is connected to the engagement link 58 in a state where the split die selection processing means 31 is advanced near the action position V. Since the engaging mechanism is connected to the link mechanism 60 which is a drive transmission system of the gap forming means 34, the power of the actuator of the gap forming means 34 can be used for driving the split type selection processing means 31. It is not necessary to provide a special driving unit even in the case of the split type approach from the vicinity of the operation position of the processing unit 31. Therefore, it is possible to reduce the size and cost. In addition, the timing adjustment from the formation of the gap to the entry into the division can be naturally performed without requiring a control system. Further, the split mold selection processing means 31 includes an engaging member 48 that engages with the split mold 18 in a gap formed between the split molds 18, and an air that moves the engaging member 48 in the moving direction of the split mold 18. Since the cylinder 54 is provided, the engaging member 48 can be moved in the moving direction of the split mold 18, and the split mold 18 can be reliably moved.

[0030]

According to the die width adjusting device of the bending machine of the present invention, the upper die is composed of a central die, a plurality of split dies, and an end die which are sequentially arranged in the die width direction. Division type selection processing means for selecting and moving a predetermined number of division types, an end type jumping-up mechanism for flipping up the end type, and an operation position at which the division type selection processing means can move the division type. And a selection processing means jumping mechanism that jumps up to a non-operating position that does not interfere with the bent piece of the sheet material. , The number of actuators can be reduced, the size can be reduced, and the cost can be reduced. In addition to the above configuration, a gap forming unit that forms a gap between the split dies that are in contact with each other is provided, and the drive transmission of the gap forming unit is performed in a state where the split mold selection processing unit is advanced near the operation position. In the case of being connected to the system, the power of the actuator of the gap forming means can be used for driving the split type selection processing means, and also in the split type approach from near the action position of the split type selection processing means,
It is not necessary to provide special driving means. for that reason,
It becomes compact and can be manufactured at low cost. In addition, the timing adjustment from the formation of the gap to the entry into the division can be naturally performed without requiring a control system. Further, the split mold selection processing means includes an engaging member that engages with the split mold in a gap formed between the split molds, and an actuator that moves the engaging member in a moving direction of the split mold. In this case, since the engaging member can be moved in the moving direction of the split mold, the split mold can be reliably moved.

[Brief description of the drawings]

FIG. 1 is a front view of a folding machine equipped with a mold width adjusting device according to an embodiment of the present invention.

FIG. 2 is a partially enlarged front view showing the longest mold width state of the mold width adjusting device.

FIG. 3 is a partially enlarged front view showing a shortest state of a mold width of the mold width adjusting device.

FIG. 4 is a front view showing an upper mold reset unit in the mold width adjusting device.

FIG. 5 is a side view of the bending machine main body.

FIG. 6 is a cutaway side view of a main part of the mold width adjusting device.

FIG. 7 is a side view of the mold width adjusting device.

FIG. 8 is a side view showing a split die selection processing means in the die width adjusting device.

FIG. 9 is a plan view of a main part of the mold width adjusting device.

FIG. 10 is a cutaway front view of an end mold lifting mechanism in the mold width adjusting device.

FIG. 11 is an enlarged cutaway side view of an elastic locking mechanism in the mold width adjusting device.

FIG. 12 is an explanatory diagram of an operation of a selection processing means jumping-up mechanism in the mold width adjusting device.

FIG. 13 is an explanatory diagram of the operation of the split die selection processing means in the die width adjusting device.

14A is an enlarged side view of a thick-walled split type, FIG. 14B is an enlarged front view of a thick-walled split type and a central die, and FIG. 14C is a plan view of the central die.

FIG. 15 is a pattern diagram of various examples of die width adjustment of the die width adjusting device.

FIG. 16 is an explanatory diagram showing a first half process of an example of a die width narrowing operation of the die width adjusting device.

FIG. 17 is an explanatory diagram showing a latter half of the operation example.

FIG. 18 is an explanatory diagram showing an engagement operation of an engagement member with a thick-walled split mold.

FIG. 19 is a flowchart of an overall shoulder width adjusting operation of the mold width adjusting device.

[Explanation of symbols]

 2 Upper die 11 Mold width adjusting device 17 Central die 18 Thick split type 19 Thin split type 20 End type 31 Split type selection processing means 32 End type jumping-up mechanism 33 Selection processing means Jumping-up mechanism 34 ... Gap forming means 48 ... Engaging member 54 ... Air cylinder (actuator) 60 ... Link mechanism (drive transmission system) 62 ... Hydraulic cylinder (actuator)

Claims (3)

[Claims] 1. An upper mold comprising a central mold, a plurality of divided molds, and an end mold which are sequentially arranged in a mold width direction. The end mold is configured to select and move a predetermined number of divided molds. Mold selection processing means, an end-type jumping-up mechanism for flipping the end mold, and the split-type selection processing means from an operation position at which the split mold can be moved to a non-operation position at which it does not interfere with the bent piece of the plate material. A die width adjusting device for a bending machine, comprising: a selection processing means jumping mechanism for jumping up; and both of the jumping mechanisms are operated to jump up by a common actuator. 2. A gap forming means for forming a gap between split dies which are in contact with each other, wherein said split mold selection processing means is configured to advance to a position near said operating position and to transmit a drive transmission system of said gap forming means. The mold width adjusting device for a folding machine according to claim 1, wherein the device is connected to a mold. 3. The split mold selection processing means includes an engaging member that engages with the split mold in a gap formed between the split molds, and an actuator that moves the engaging member in a moving direction of the split mold. The mold width adjusting device for a bending machine according to claim 2.