JPH0584414U - Automatic mold changer for bending machine - Google Patents

Abstract

(57) [Summary] [Purpose] To save space and provide a large number of replacement dies to shorten the replacement tact. [Constitution] Adjacent to the bending apparatus 1, the left and right locking members 39 are offset, and a gondola-type die stocker 31 accommodating a large number of die sets 33 suspended in an endless chain 35 is provided. A mold exchanging device 45 for horizontally exchanging the upper die 7 and the lower die 9 between the die stocker 31 and the bending apparatus 1 to perform die exchange.
And a mold feeding device 47 having a drive part 49 for moving the chain 59 supporting the mold clamp part 67 in an expandable and contractible manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of an automatic die changing device in a bending device.

[0002]

[Prior Art]

 Conventionally, in order to replace a mold mounted on a bending device, a carrier such as a forklift conveys the mold from a warehouse where the mold is stored to a place where the bending device is installed and manually replaces it, or the mold is adjacent to the bending device. Then, a method was adopted in which a mold stocker containing the molds was installed and automatically replaced.

[0003]

[Problems to be solved by the device]

 By the way, for example, as a mold exchanging means in the conventional bending device described above, manual die exchanging requires a lot of time and labor and cannot improve the operation rate of the machine, so that safe work can be ensured. It was a big obstacle from the aspect. Therefore, automatic mold changers have been widely used in recent years, but all of them have problems such as a small number of molds to be stored, a long exchange tact, and a large installation space.

In order to solve the above problems, an object of the present invention is to provide an automatic die changer in a bending apparatus which has a small amount of space and has a large number of exchange dies, and which shortens the exchange tact. Especially.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is directed to a gondola-type mold stocker that accommodates a large number of mold sets that are suspended from an endless transmission member with right and left support portions offset from each other adjacent to a bending device. Is provided, and a mold exchanging device for horizontally exchanging the mold between the mold stocker and the bending device is provided for exchanging the mold, and the mold clamp portion is supported by the mold exchanging device. An automatic die changer in a bending machine was constructed by providing a die feeder equipped with a drive unit that telescopically moves the transmission member.

[0006]

[Action]

 By adopting the automatic die changer in the bending apparatus of the present invention, the die stocker provided adjacent to the bending apparatus is a gondola type and accommodates a large number of die sets. A mold exchanging device that inserts a mold from the mold stocker into the mold attachment part of the bending device or stores the mold attached to the bending device in the mold stocker is equipped with a mold at the tip of the transmission member. A die is automatically exchanged by a die feeding device having a driving portion for supporting a clamp, holding a die to be exchanged by the die clamp portion, and winding and rewinding a transmission member. Thus, the replacement tact can be shortened and the space can be saved.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Since the bending device has a known structure, detailed illustration and description thereof will be omitted.

Referring to FIGS. 1 and 2, a bending device 1 is provided with a movable table 5 which is provided to move up and down along a side plate 3, and the movable table 5 is not shown in the drawings, but may be a cylinder or the like. It is raised and lowered by. An upper die 7 is attached to the lower surface of the movable table 5 so that it can be inserted and removed in the horizontal direction. A lower mold 9 is mounted on a fixed table 11 facing the upper mold 7 in the downward direction, and the lower mold 9 is also provided so as to be insertable and removable in the horizontal direction.

A clamp device 13 for fixing the upper mold 7 to the movable table 5 and the lower mold 9 to the fixed table 11 is provided. More specifically, referring to FIG. 3, on the upper mold 7 side of the clamp device 13, a fluid pressure operated cylinder 17 is provided on a bracket 15 protruding from the side surface of the movable table 5, and a piston of this cylinder 17 is provided. The wedge body 21 mounted on the rod 19 is brought into contact with the tapered surface 23 formed on the side surface of the upper mold 7.

Further, on the lower mold 9 side of the clamp device 13, in the same manner as the structure of clamping the upper mold 7, a fluid pressure operated cylinder 17 is provided on a bracket 25 protruding from the side surface of the fixed table 11. The wedge body 27 attached to the piston rod 19 of the cylinder 17 is brought into contact with the tapered surface 29 formed on the side surface of the lower mold 9.

With the above structure, the upper die 7 and the lower die 9 inserted by the die feeding device of the die exchanging device to be described later are positioned at predetermined positions, and the cylinder 17 is operated to move the piston rod 19 into place. When moved to the right in FIG. 3, the wedge bodies 21 and 27 press the tapered surface 23 of the upper mold 7 and the tapered surface 29 of the lower mold 9 to move the upper mold 7 to the movable table 5. The lower die 9 is fixed to the fixed table 11. Then, a cylinder (not shown) is driven to move the movable table 5 up and down, and the upper die 7 and the lower die 9 cooperate to bend the plate W. When replacing the upper die 7 and the lower die 9, the cylinder 17 is operated to move the piston rod 19 to the left in FIG. 3, so that the wedge bodies 21 and 27 are moved to the upper die 7 and the lower die 7. The mold is exchanged after the mold 9 is separated from the mold to release the fixation.

A mold stocker 31 is provided adjacent to the bending device 1. More specifically, referring to FIG. 1, FIG. 2, FIG. 4, FIG. 5, and FIG. 6, the mold stocker 31 has a gondola type, and a large number of mold sets 33 are provided on both sides of the mold set 33. It is locked to a chain 35 which is an endless transmission member provided on the. The mold set 33 has an upper mold 7 and a lower mold 9 mounted on a U-shaped frame 37, and the chain 35 and the frame 37 of the mold set 33 are connected to each other as shown in FIG. The locking member 39 for locking is provided offset by the dimension A.

As shown in FIG. 4, the mold set 33 is suspended in a large number (8 in this embodiment) on an endless chain 35, and the chain 35 is rotatable around a frame 41. It is supported by the upper sprocket 43 and is hung on the lower sprocket 43. Although not shown, for example, one sprocket 43 is driven by a motor or the like via a rotation transmission member, and is positioned at a replacement position indicated by a symbol K in FIGS. 1 and 4. The front side of the die stocker 31 (the front side orthogonal to the drawing in FIG. 1, the lower side in FIG. 2, the right side in FIG. 4) is the automatic exchange side, and the opposite side of this automatic exchange side sets the die. It is the manual replacement side.

With the above-described structure, when the sprocket 43 is rotated by driving the electric motor (not shown) through the rotation transmission member, the mold set 33 moves through the locking member 39 provided on the chain 35. At this time, since the locking member 39 that connects the mold set 33 and the chain 35 is provided by being offset by the dimension A, the mold set 33 can be smoothly moved without any shake during the movement. You can

A mold exchanging device 45 is provided adjacent to the mold stocker 31. More specifically, referring to FIG. 1, FIG. 2, FIG. 3 and FIG. 7, FIG. 8, the mold feeding device 47, which constitutes the mold exchanging device 45, is used for the upper die exchanging and the lower die exchanging. It consists of: Since the upper mold replacement and the lower mold replacement are made of completely symmetrical members, a detailed description will be given only of the mold feeding device 47 for the upper mold replacement. With respect to the replacement mold feeding device 47, the same parts are designated by the same reference numerals and the description thereof will be omitted.

The drive unit 49 of the die feed device 47 is provided adjacent to the die stocker 31 described above, and the feed drive motor 53 is vertically provided on the frame body 51. A sprocket 57 is mounted on the output shaft 55 of the feed drive motor 53, and one end of a feed chain 59 as a transmission member is locked to the sprocket 57.

The feed chain 59 is provided in a rectangular guide groove 65 formed in a chain guide 63 that is horizontally extended on the front side of the mold stocker 31 and the bending device 1 via an idler sprocket 61. Is reciprocally inserted (see FIG. 3). A die clamp portion 67 is attached to the tip of the feed chain 59, and a crumb portion main body 71 is integrally attached to an attachment 69 provided in the feed chain 59.

As shown in detail in FIG. 8, the clamp portion main body 71 is internally provided with a fluid pressure operating cylinder 73, and a tip end of a piston rod 75 of the cylinder 73 is formed with a tapered portion 77. Has been done. A tubular body 79 is integrally provided on the clamp portion main body 71, and steel balls 81 are attached to the tubular body 79 at a plurality of locations, and the steel balls 81 are formed by the tapered portions 77 formed on the piston rod 75. Can appear and disappear freely.

On the other hand, a stepped locking hole 83 is provided on one surface of the upper die 7, and the small diameter portion 85 of the stepped locking hole 83 operates the cylinder 73 mounted on the clamp body 71. When the piston rod 75 is retracted, the steel ball 81 mounted on the tubular body 79 is sunk, and the upper die 7 and the die clamp portion 67 are detachable from each other. In addition, the large diameter portion 87 of the stepped locking hole 83 has a taper provided on the piston rod 75 by inserting the die clamp portion 67 into the upper die 7 and operating the cylinder 73 to project the piston rod 75. The steel ball 81 is projected at the portion 77, and the diameter is such that the steel ball 81 is locked by the stepped surface 89 of the large diameter portion 87. A member 91 shown in the drawing of FIG. 7 is a die abutting portion when the upper die 7 is inserted into the bending device 1, and is provided at an appropriate position of the bending device 1. ing.

With the above configuration, for example, when the upper and lower molds 7 and 9 housed in the mold stocker 31 are inserted into the movable table 5 and the fixed table 11 of the bending apparatus 1, the feed drive motor 53 is used. The feed chain 59 which has been driven and wound is rewound. When the feeding chain 59 is rewound, the mold clamp portion 67 advances, and the desired upper and lower molds 7 and 9 housed in the mold stocker 31 and the lower metal mold set 33 are housed. The tubular body 79 provided with the steel ball 81 provided in the mold clamp portion 67 is inserted into the stepped locking hole 83 provided in the molds 7, 9. At this time, the piston rod 75 of the cylinder 73 built in the clamp body 71 is positioned at the retracted end.

When the cylindrical body 79 of the mold clamp portion 67 is inserted into the stepped locking holes 83 of the upper and lower molds 7 and 9, the cylinder 73 is operated to cause the piston rod 75 to project, whereby the steel The ball 81 projects and is locked in the large-diameter portion 87 of the stepped locking hole 83, and the upper and lower molds 7 and 9 move horizontally as the feed chain 59 moves, and are fixed to the movable table 5 of the bending device 1. It is inserted into the table 11 and stopped at the die abutting portion 91. After that, the upper and lower molds 7 and 9 are fixed to the movable table 5 and the fixed table 11 by the operation of the clamp device 13, and the upper and lower molds 7 and 9 and the mold clamp portion 67 are locked. Is released and the feed drive motor 53 is rotated in the reverse direction to wind up the feed chain 59, and the mounting work of the upper and lower molds 7 and 9 is completed.

It is possible to store the lower molds 7 and 9 after they have been used by the bending device 1 in the mold stocker 31 by reversing the above operation. Further, at the time of mold replacement, the upper mold 7 and the mold set 33 of the mold stocker 31 mounted on the movable table 5 of the bending apparatus 1 are positioned and replaced at the K position, which is the replacement work. Further, when a mold longer than the mold stored in the mold set 33 of the mold stocker 31 is required, the same mold is provided for a plurality of mold sets 33 and the molds are sequentially sent to the bending device 1. This allows replacement.

With the above-described structure and operation, the mold as the mold exchanging device 45, in which the gondola-type mold stocker 31 is provided adjacent to the bending device 1 and the feed chain 59 is provided with the mold clamp portion 67, is provided. The upper and lower molds 7 and 9 are put in and taken out by the feeding device 47 and are automatically replaced.

For this reason, the mold stocker 31 is a gondola type, and a large amount of mold sets 33 can be stored and automatically replaced, so that space can be saved and the replacement tact can be shortened. Further, the offset gondola mechanism prevents the die set 33 from tipping over and swinging, and the automatic storage side and the manual exchange side have the same orientation for storing the die set 33, which prevents erroneous work. Further, since the feed chain 59 is of the winding and rewinding type instead of the type in which the mold is exchanged by using a long rod or the like as in the conventional case, the space can be saved.

It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[0026]

[Effect of the device]

 As can be understood from the above description of the embodiments, according to the present invention, since the structure is as described in the scope of claims for utility model registration, the gondola type mold stocker has a large amount of metal. The mold can be stored, and the mold is replaced by a mold feeder using a transmission member.

Therefore, it is possible to save space and shorten the cycle time for exchanging molds.

[Brief description of drawings]

FIG. 1 is a front view of a bending device including a mold stocker and a mold automatic changing device.

FIG. 2 is an enlarged plan view of FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an enlarged view of a V arrow portion in FIG.

FIG. 6 is a side view seen from the left side in FIG.

FIG. 7 is an enlarged view of a VII arrow part in FIG.

8 is an enlarged cross-sectional view taken along the line VIII-VIII in FIG.

[Explanation of symbols]

 1 Bending Device 7 Upper Die 9 Lower Die 31 Die Stocker 33 Die Stocker 33 Die Set 35 Chain 39 Locking Member (Support) 45 Die Changer 47 Die Feeder 49 Drive 59 Cable 67 Die Clamp A Offset amount

Claims (1)

[Scope of utility model registration request] 1. A mold stocker of a gondola type is provided which accommodates a large number of mold sets suspended from an endless transmission member with right and left support portions offset from each other adjacent to a bending device. A mold exchanging device for horizontally exchanging the mold between the bending device and the mold exchanging device is provided, and the transmission member supporting the mold clamp is telescopically moved to the mold exchanging device. An automatic mold changing device in a bending device, which is provided with a mold feeding device having a drive section.