JP3534812B2 - Bending equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending device , and more particularly, to a method for easily removing a box-bending side die after bending. To a bending method and an apparatus therefor. 2. Description of the Related Art Conventionally, as a mold slide mechanism for hollowing out a box bending ear mold at the end of bending, Japanese Utility Model Application Laid-Open No.
As described in JP-A-34927, there is known a box-bending mold provided with a rocking body that protrudes toward a lower side of an upper mold and is rotatable in a vertical direction. Also, JP-A-63-22
As described in Japanese Patent Application Laid-Open No. 0926 and Japanese Patent Application Laid-Open No. 1-289513, there is known a type in which an upper central die of a holding die is vertically pulled out by an ironing and bending machine. Further, there is also known a type in which a central mold is obliquely punched forward. [0003] In the above-mentioned conventional mold slide mechanism for hollowing out the box bending mold, in the type in which the oscillator is rotated, the oscillator is smooth. There is a problem that the metal mold does not drop and the dimensional accuracy of the metal mold is worse than that of the integrated metal mold. In the model where the mold at the center is pulled upward, a space is required to remove the mold at the center upward, and the left and right molds adjacent to the mold at the center have ear shapes. Accuracy will be worse. Further, at the time of bending, there is a problem that the mold at the center portion must be pressed with a force capable of holding down the bending pressure, so that a strong cylinder or the like is used, resulting in an increase in cost. [0004] Further, in the case where the mold at the center is obliquely pulled forward, there is a problem that the mold at the center is released to the front and interferes with the workpiece after the box bending is completed. SUMMARY OF THE INVENTION It is an object of the present invention to provide a bending method which simplifies a mold slide mechanism while reducing the cost while ensuring high accuracy in box bending, and reduces the number of replacement steps by simplifying a mold slide method. And to provide the device. SUMMARY OF THE INVENTION [0006] The present invention relates to the above-described problems.
The upper part of the bending machine
An upper mold is provided at the bottom of the table, and this upper mold
Split mold and side parts provided on both sides of this central split mold
A split mold, and the center split mold is
To the rear of the bull
To the space created by moving the mold to the back side, in front of both sides
Bending device with movable side split mold
, A cylinder plug provided at a lower portion of the upper table
Between the plate and the intermediate plate provided on the lower surface of the upper table
The side part is divided into rails that can be moved in the left-right direction.
Equipped with a mold, and a hinge pin
Tops that are rotatable up and down
A joint is provided, and the slope is formed on a slope groove formed in the rail.
The rail of the engagement part is engaged and the rail can be pushed up
It is characterized in that it is configured as follows . An embodiment of the present invention will be described below in detail with reference to the drawings. Since the bending machine has a known structure, detailed illustration and description are omitted. Referring to FIG. 1, although not shown, an upper mold 5 is provided at a lower portion of an upper table 3 which can be moved up and down provided in a bending machine 1. The upper mold 5 is a mold 7 for dividing the central part.
A and a side parting mold 7B provided on both sides of the center parting mold 7A. The center part split mold 7A is shown in FIGS.
Also, refer to the upper die clamping intermediate plate lower block 9
, The plate 11 and the clamp 13, the plate 11
The central split mold 7A is fixed to the center. Plate 11
Is fastened to a holder 15A, and holders 15B are provided on both sides of the holder 15A. The upper portion of the holder 15B is connected by a cylinder beam 17. Furthermore, holder 1
A stopper beam 19 is provided at an intermediate portion of 5B. The inner surface of the holder 15B has a longitudinal direction LM.
A guide 21 is provided, and a guide bracket 23 that is guided by the front-rear LM guide 21 and moves in the front-rear direction is mounted. The guide bracket 23 is, for example, a second drive member 27A that constitutes a drive member 27 that can be extended and contracted in the front-rear direction (a direction perpendicular to the drawing in FIG. 1 and a left-right direction in FIGS. 2 and 3) via the floating joint 25, for example. A fluid-operated cylinder is connected, and the second drive member 27A is fixed to the cylinder beam 17. Further, the driving member 2 is connected to the upper end of the guide bracket 23 via a floating joint 25.
7 as a first drive member 27B, which is a member of
For example, a hydraulic cylinder is fixed to the upper table 3 in an upright state. Then, the guide bracket 23 is moved up and down (up and down directions in FIGS. 1, 2 and 3).
The vertical LM guide 29 that moves to the upper table 3
It is provided to extend in the up-down direction. An intermediate plate 31 in which the center split mold 7A is fixed to a support plate 3A provided on the upper table 3
In order to tighten the cylinder, a hydraulic cylinder 35 is provided vertically on the rear side of the upper table 3 (the front side in FIG. 1 and the left side in FIGS. 2 and 3) via a cylinder plate 33, and the piston rod 37 is moved downward. It is provided so as to freely protrude in the direction. A top 41 is rotatably mounted on a hinge pin 39 provided at a lower portion of the cylinder plate 33, and the top 41 is fixed by a piston rod 37 of the cylinder 35.
The top 41 is rotated by pressing the surface A of the intermediate plate 31 by pressing the plate 11 on the surface B of the top 41.
The center divided mold 7A is fixed to the upper table 3 in cooperation with. When the central mold 7A is detached from the upper table 3, the top 41 becomes free by detaching the piston rod 37 of the cylinder 35 so that the upper mold 5 can be detached. With the above configuration, the central split mold 7A is retracted to the rear side of the upper table 3 from the detached state shown in FIG. 3 from the mounted state of the central split mold shown in FIG. I do. That is, when the cylinder of the first drive member 27B, which is one of the members constituting the drive member 27 provided on the upper table 3, is operated and the piston rod is projected,
Guide bracket 2 using vertical LM guide 29 as a guide
3, holders 15A and 15B, plate 11, clamp 13
The center part split mold 7A suspended by the
₁ (for example, 2 mm). When the cylinder of the second driving member 27A, which is one of the members constituting the driving member 27, is operated to reduce the piston rod, the LM guide 21 is used as a guide in the front-rear direction, and the guide bracket 23, the holders 15A and 15A are used.
B, the plate 11, the central part split mold 5 suspended by the clamp 13 and the like retreats by a predetermined amount S2. The predetermined amount S ₂
Is the amount by which a side portion split mold 7B, which will be described later, can enter a space formed by retreating the center portion split mold 7A. When separating the central part mold 7A from the upper table 3, the cylinder 35 is slightly retracted and the top 41 is set in a free state, so that the central part mold 7A is mounted on the upper table 3. Performs the above operation in reverse, and finally operates the cylinder 35 to move the piston rod 37
Is projected, the top 41 is rotated and the plate 11 is pressed, whereby the central part mold 7A is fixed to the upper table 3 and the mounting of the central part mold 7A is completed. The movement of the top 41 is caused by its own weight.
And the clamp by the cylinder 35 and the second
The pressing surface C of the driving member 27A by the cylinder is the same, and the upper mold 5 is moved by the cylinder of the second driving member 27A and pressed against the pressing surface C.
The central part mold 7A is pulled up by the 7B cylinder D
Press it against the surface to complete positioning. However, since the clamping force is weak only with the cylinder of the second driving member 27A,
A strong clamping force can be secured by the combination of the cylinder 35 and the top 41. Next, as shown in FIGS. 1, 4 and 5, a plurality of side division molds 7B adjacent to both sides of the center division mold 5 are arranged below the upper table 3. A provided cylinder plate 43 is provided, and a top 47 is rotatably mounted on the cylinder plate 43 via a hinge pin 45. An intermediate plate 51 is provided on the lower surface of the upper table 3 via an adjusting plate 49, and is provided between the intermediate plate 51 and the cylinder plate 43 in the left-right direction (the left-right direction in FIGS. , A rail 53 extending in a direction perpendicular to the drawing) is inserted. The rail 53 is provided with an intermediate plate lower block 55 and a clamp 57, and a side parting die 7B is inserted between the intermediate plate lower block 55 and the clamp 57, and the clamp 57 is tightened. The side split mold 7B is fixed. A bearing 59 is erected at an appropriate position on the rail 53, and a piston rod 63 of, for example, a hydraulic cylinder, which is a driving member 61 which expands and contracts in the left-right direction, is coupled to the bearing 59. It is locked on a support plate 65 that protrudes more. The top 47 is always urged upward by a spring 67, and when the piston rod 71 of the cylinder 69 provided on the cylinder plate 43 projects, the top 47 is pushed down and rotated. Reference numeral 73 denotes a stopper that stops the top 47 from turning upward. Although the driving member 61 is shown on only one side in FIG. 1, it is provided on both left and right sides. As shown in FIG. 6, the top 47 has an engaging portion 47a formed at a lower portion thereof.
Has an inclined surface 75. The slope 75 is brought into contact with a slope groove 77 formed in the rail 53 and the rail 5
3 is provided with a groove 81 which engages with a key 79 locked on the cylinder plate 43. For this reason, when the cylinder 69 is operated to cause the piston rod 71 to protrude and the top 47 to be pressed, the top 47 rotates counterclockwise, and the slope 75 formed on the rail 53 by the slope 75 of the engaging portion 47a. Push up 77. Then, while the rail 53 is pressed against the intermediate plate 51,
The rail 53 rises until there is no gap in the surface, so the side split mold 7B is clamped to the upper table 3. In order to unclamp the side parting mold 7B, the top 47 is rotated upward by the contracting force of the spring 67 by reducing the piston rod 71 of the cylinder 69 , as shown in FIG. The position shown by the two-dot chain line is inside. For this reason, the slope 75 of the engaging portion 47a of the top 47 is
Since the rail 53 is separated from the inclined groove 77 formed on the rail 53, the rail 53 descends and the upper surface of the groove 81 comes into contact with the key 79, so that the side parting mold 7B is in an unclamped state. With the above configuration, the driving member 6 is used to pull the side parting mold 7B into the space formed by retreating the central parting mold 7A to the rear side of the upper table 3 as described above.
By operating the fluid-operated cylinder 1 and reducing the piston rod 63, the piston rod 6
The rail 53 connected to 3 moves in the left-right direction. Since the rail 53 has the upper surface of the groove 81 in contact with the key 79 and the F surface, G surface, H surface, and I surface are guide surfaces of the rail 53, the rail 53 can be smoothly shifted. Since the side parting mold 7B is fixed by 57, the side parting mold 7B can move to the space formed by the retreat of the center parting mold 7A. With the above-described configuration, the operation is described with reference to FIGS. 8 to 17. FIGS. 8 to 12 show the operation from the end of bending to the removal of the workpiece. FIGS. Shows the mounting operation of the mold. First, the operation from the end of bending to the removal of the work will be described. FIG. 8 shows a state at the time of completion of the bending process, in which the center divided mold 7A, the side divided mold 7B, and the lower mold 85 provided on the fixed lower table 83 cooperate. The work W is bent. Reference numeral 87 indicates a robot hand. Next, as shown in FIG. 9, the workpiece W, the center split mold 7A, and the side split mold 7B are raised together with the upper table 3 to the uppermost limit. The center split mold 7A is unclamped. Then, as shown in FIG.
The workpiece W is divided by the robot hand 87 into the central divided mold 7.
A, slide by a predetermined amount L from the cutting edge position of the side parting mold 7B, and then unclamping the side parting molds 7B provided on both sides of the center parting mold 7A. Next, as shown in FIG. 11, the center divided mold 7A is moved to the first driving member 27 as the driving member 27.
By the operation of B and the second drive member 27A, the central split mold 7A is moved to the rear side of the upper table 3 to create a space where the left and right side split molds 7B can be drawn inward. Then, as shown in FIG. 12, the side split molds 7B provided on the left and right sides are pulled into the space formed by the retreat of the center split mold 7A, so that the ears 7C on both sides are formed. Since it moves inward with respect to the work W,
Work W without being disturbed by bent work W
Can be taken straight down. Next, the mounting operation of the mold will be described.
The state shown in FIG. 13 shows a state when the work W is removed from the state shown in FIG. That is, the left and right side divided molds 7B are drawn into the space in which the central divided mold 7A provided at the center has been retracted. In this state, the left and right side split molds 7B are opened outward as shown in FIG. At this time, a slight gap (about 2 mm) is formed between the center divided mold 7A and the side divided mold 7B. Then, as shown in FIG. 15, the center divided mold 7A is moved toward the upper table 3 to the second driving member 2A.
It is advanced by the operation of 7A. At this time, a slight gap (about 2 mm) is kept between the center split mold 7A and the intermediate plate 31 provided on the upper table 3. When the center divided mold 7A advances, FIG.
As shown in (1), the central part mold 7A is raised and positioned by the operation of the first drive member 27B to clamp the central part mold 7A. At this time, a slight gap (approximately 2 m) is provided between the center divided mold 7A and the side divided mold 7B.
m) is maintained. Next, as shown in FIG. 17, the left and right side divided molds 7B are pulled inward, and the side divided molds 7B are brought into contact with the center divided mold 7A, and the side divided molds 7B are brought into contact with each other. Split mold 7
B is clamped to complete the mounting operation. According to the above-described configuration and operation, the left and right side divided molds 7B are drawn into the space created by moving the center divided mold 7A to the rear side after the completion of the bending process, and the mold is removed from the work W. By removing the workpiece, the number of steps for removing the workpiece can be reduced, and since the ear portion of the mold is an integral part, the bending accuracy is good. Further, since the constituent members of each part are simplified, the number of processing steps can be reduced as compared with the related art, and parts can be easily replaced, so that the cost can be reduced. The embodiment shown in FIG. 7 shows another embodiment of the driving member 27 of the center divided mold 7A provided at the center. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. That is, the upper table 3
The guide bracket 8 is attached to the vertical LM guide 29 provided on the
9 is provided so as to be vertically movable.
The up and down movement of the first member which is a member of the driving member 29
The operation is performed by a fluid pressure operated cylinder as the driving member 27B. The holders 15A and 15B are rotatably mounted on a bearing 91 provided on the guide bracket 89 via a shaft 93. The center split mold 7A is mounted below the holders 15A and 15B, and the supporting member 95 connecting the holders 15A and 15B is used as a second driving member 27A, which is a member constituting the driving member 27, as a fluid pressure. An operation cylinder is provided, and a piston rod of the cylinder is mounted on the guide bracket 89. By operating the cylinder, which is the second driving member 27A as the driving member 27, with the above structure, the center divided mold 7A is indicated by an arrow in the drawing of FIG. Thus, it is possible to make a space in which the left and right side split molds 7B can be retracted with respect to the upper table 3 by a predetermined amount and retracted. Therefore, the same effect as that of the first embodiment can be obtained. The present invention is not limited to the embodiments described above, but can be embodied in other modes by making appropriate changes. For example, in this embodiment, a hydraulic cylinder is used as the driving member, but a ball screw and a motor, a rack and pinion and a motor, or the like may be used. As will be understood from the above description of the embodiment, according to the present invention, after the bending process is completed, the central part mold is moved rearward, and then left and right. The provided side part mold is drawn into the space created by moving the center part mold, and the upper mold is extracted from the work. The upper mold is an integral member, and the mold slide mechanism is simplified while cost is reduced while ensuring high bending accuracy, and the number of slide steps is reduced by simplifying the mold slide method. Reduction can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear view of an upper table provided with a split mold, showing a main part of the present invention. FIG. 2 is an enlarged sectional view taken along line II-II in FIG. FIG. 3 is an operation explanatory view when the upper mold in FIG. 2 is retracted. FIG. 4 is an enlarged view of a part viewed from an arrow IV in FIG. 1; FIG. 5 is an enlarged sectional view taken along line VV in FIG. FIG. 6 is an enlarged view of a portion viewed from an arrow VI in FIG. 5; FIG. 7 is an explanatory sectional view showing a driving member of an upper mold according to a second embodiment of the present invention. FIG. 8 is an explanatory diagram of an operation of releasing a work from an upper mold according to the present invention. FIG. 9 is an explanatory diagram of an operation of separating a work from an upper mold according to the present invention. FIG. 10 is an explanatory diagram of an operation of releasing a work from an upper mold according to the present invention. FIG. 11 is an explanatory diagram of an operation of separating a work from an upper mold according to the present invention. FIG. 12 is an explanatory diagram of an operation of releasing a work from an upper mold according to the present invention. FIG. 13 is an explanatory diagram of an operation of mounting the upper mold according to the present invention. FIG. 14 is an explanatory diagram of an operation of mounting an upper mold according to the present invention. FIG. 15 is an explanatory view of an operation of mounting the upper mold according to the present invention. FIG. 16 is an explanatory view of an operation of mounting an upper mold according to the present invention. FIG. 17 is an explanatory diagram of an operation of mounting the upper mold according to the present invention. [Description of Signs] 1 Bending machine 3 Upper table 5 Upper die 7A Center split die 7B Side split die 27 Drive member 27A Second drive member 27B First drive member 61 Drive member 85 Lower die

Claims (1)

(57) [Claims] (1) An upper tape in a bending machine (1)
The upper mold (5) is provided at the lower part of the
(5) is a central part mold (7A) and this central part mold
The side split mold (7B) provided on both sides of the mold (7A)
And the center split mold (7A) is connected to the upper tape.
(3) so that it can be freely moved to the rear side.
Space created by moving the split mold (7A) to the rear side
The side split molds (7B) on both sides are movably provided.
Wherein the upper table is
(3) a cylinder plate (43) provided at a lower portion and the cylinder plate (43);
With the intermediate plate (51) provided on the lower surface of the upper table (3)
A rail (53) that can be moved in the left-right direction between
The side plate splitting mold (7B), the cylinder plate
(43) pivotable up and down via hinge pin (45)
A member provided with a slope (75) on a top (47)
A joint (47a) is formed on the rail (53).
The slope of the engaging portion (47a) is provided on the slope of the slope groove (77).
The surface (75) is engaged and the rail (53) can be pushed up.
A bending apparatus characterized in that the bending apparatus is configured to have a function .