JP2685291B2 - Bending machine for plate materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a bending apparatus for a plate material configured to push and bend a plate material by a swivel die using a bending guide die as a fulcrum.

(Prior Art) As shown in FIG. 5, a conventional bending apparatus of this type has a base 2 of an apparatus body 1 to which a sandwiching die 3 is attached by screws or the like, and which is vertically moved by an air cylinder (not shown). The bending guide die 5 is attached to the body 4. On the other hand, an air cylinder 10 is attached to a support portion 6 fixed to the base 2 so as to be rotatable around a shaft 7, and is also attached to a support portion 8 also fixed to the base 2 so as to be swingable around a shaft 9. Attach the swivel die 12 to the swivel mounting plate 11. Then, the plate material 13 is placed over the sandwiching die 3 and the swivel die 12, and the elevating body 4 is lowered to sandwich the plate material 13 between the sandwiching die 3 and the bending guide die 5. After this, as shown by the chain double-dashed line in FIG. 5, the mounting plate 11 and thus the swivel die 12 are swung around the shaft 7 by the air cylinder 10, and the plate material 13 is bent to the curved surface 5a of the guide die 5.
It is to push and bend along.

(Problems to be Solved by the Invention) Such a bending apparatus is used, for example, when an outer box of a washing machine is formed by bending, but when bending an outer box of a different model, a bending die is used. 3, the bending guide die 5 and the swivel die 12 must be replaced. In this case, the sandwiching die 3 and the bending guide die 5 can be attached to the elevating body 4 and the base 2 while maintaining an accurate positional relationship by the guide pin and the guide bush. However, since the swivel die 12 has the air cylinder 10 serving as the swivel drive source attached to the base 2, it is completely separate from the sandwiching die 3 and the bending guide die 5, and such an accurate position is required. Inability to take steps to maintain relationships. Therefore, when the swivel die 12 is attached to the attachment plate 11, the attachment work must be performed while adjusting the positional relationship between the sandwiching die 3 and the bending guide die 5, which causes a problem that so-called setup work takes a long time. there were.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a plate bending apparatus capable of shortening the setup time for mounting the die on the base and the movable mounting member.

[Structure of the Invention] (Means for Solving the Problems) In the plate material bending apparatus of the present invention, one of the sandwiching die and the bending guide die that are arranged to face each other is attached to the base and the other die is attached. It is attached to a movable mounting member, and a plate material is sandwiched between the sandwiching die and the bending guide die, and the swivel die arranged on the sandwiching die side is rotated by a swivel drive source to the center of curvature of the bending surface of the bending die. The plate material is pushed and bent along a bending surface of the bending guide die by rotating about a portion as a center, and the rotary actuator is attached to the sandwiching die as a rotary actuator of the rotary drive source. The rotary type is attached to the rotary shaft of the actuator.

(Operation) Since the swivel type is attached to the sandwiching type via the rotary actuator, and the swivel type and the sandwiching type are unitized in advance, the swivel type also becomes a bending guide type by mounting the sandwiching type. Therefore, it is arranged at a regular position. For this reason, it is not necessary to perform the work of mounting the swivel type while positioning the swivel type by itself, and the setup work time for mounting is shortened.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

The overall structure of the bending apparatus is as shown in FIG. 4, and its main body 21 is composed of a base frame 22 to which a base 23 and a gate-shaped support frame 24 are attached. As shown in FIG. 1, a conveyor 26 is installed to convey the metal plate material 25 to be bent. The air cylinder 27 is attached to the support frame 24 with the rod 27a
An elevating plate 28 as a movable mounting member is attached to the. A guide pin 29 is attached to the elevating plate 28 so as to face upward. The guide pin 29 is fitted and supported by a guide bush 30 attached to the support frame 24 so as to be vertically movable, and the elevating plate 28 is attached.
It will guide you up and down.

Now, as shown in FIG. 1, the mold for bending the plate member 25 is composed of a bending guide mold 31, a sandwiching mold 32 and a turning mold 33 which are arranged so as to face the bending guide mold 31. Among these, the bending guide die 31 is composed of a holder 34 and a bending guide die main body 35 fixed to the holder 34 by screws (not shown). One end surface of the bending guide die main body 35 has a predetermined curvature. Is formed as a curved surface 35a. Further, the sandwiching die 32 is composed of a holder 36 and a sandwiching die main body 37 fixed to the lower surface of the holder 36 by screws (not shown). As shown in FIG. 4, mounting pieces 36a are provided so as to project downward on both left and right sides of the holder 36 of the sandwiching die 32, and both of the mounting pieces 36a serve as turning drive sources, for example, pneumatic rotary type. The actuator 38 is attached by screws 39 (see FIG. 2). The rotary shaft of the rotary actuator 38
38a is inserted through the mounting piece 36a and is projected inside thereof.

On the other hand, the swivel type 33 is composed of a swivel holder 40 and a swivel type main body 41 fixed to the lower surface of the swivel holder 40 by screws (not shown).
40a is projected. The arm 40a of the swivel holder 40 is fitted and fixed to the tip of the rotary shaft 38a of the rotary actuator 38. Therefore, the swivel die 33 is pivotally connected to the rotary actuator 38, and the sandwiching die 32
And it is in a unitized state.

Thus, the bending guide type main body 35 is provided with the guide bush 42, and the sandwiching type main body 37 is provided with the guide post 43 that can be fitted to the guide bush 42.
By fitting the guide bush 42 and the guide post 43, the bending guide main body 35 and the sandwiching main body 37 are configured to have a regular positional relationship. Further, the swivel type main body 41 is also attached to the swivel holder 40 so as to be in a proper position in relation to the bending guide type main body 35 and the sandwich type main body 37.

In order to attach such a mold to the main body 21 side, first, the guide bush 43 of the bending guide die main body 35 is engaged with the guide post 43 of the sandwiching die main body 37 so as to be sandwiched on the bending guide die 31. With the mold 32 and the swivel mold 33 set, the holder 34 of the bending guide mold 31 is attached to the base 23 with the bolts 44.
Further, the lift plate 28 is lowered by the air cylinder 27, and the holder 35 of the sandwiching die 32 is attached to the lift plate 28 with the bolt 45 while the guide bush 42 and the guide post 43 are still fitted.

In order to bend the plate material 25, the plate material 25 is sent onto the bending guide die 31 by the conveyor 26, and the lift plate 28 is lowered by the air cylinder 27. Then, the sandwiching die 32 descends to sandwich and fix the plate material 25 between the bending guide die main body 35 and the sandwiching die main body 37. In this state, the rotary shaft 38a of the rotary actuator 38 is rotated counterclockwise by a predetermined angle in FIG. As a result, the swivel holder 40 and thus the swivel type main body 41
Is rotated counterclockwise by the rotary shaft 38a, and as shown in FIG. 3, the plate member 25 is bent by the bending surface 35a of the bending guide main body 35.
Bend along. After bending, the rotary shaft 38a of the rotary actuator 38 is rotated clockwise by a predetermined angle to return the swivel die 33 to the original position shown in FIG. Then, the lift plate 28 is raised by the air cylinder 27 to release the sandwiching of the plate material 25, and the plate material 25 after the bending process is taken out.

When changing the type of product obtained by bending, the bending guide die 31, the sandwiching die 32, and the swivel die 33 are replaced with those suitable for the product. First of all, bolt 44 and
45 is removed, and the holder 34 and the clamping die 32 of the bending guide die 31 are removed.
The holders 36 are removed from the base 23 and the lift plate 28, respectively. Then, different types of bending guide mold and sandwiching mold to be replaced are attached to the base 23 and the elevating plate 28 via the respective holders in the same manner as described above.

As described above, according to this embodiment, the rotary actuator 38 is attached to the sandwiching die 32, and the swivel die 33 is attached to the rotary shaft 38a of the rotary actuator 38.
Can be unitized with the sandwich type 32. For this reason, the mold
In the case of mounting on the 21 side, if the sandwiching die 32 is installed at a proper position in relation to the bending guide die 31, the swivel type main body 41 is not only the sandwiching die main body 37 but also the bending guide type main body 35. Also, since it is arranged in a regular position, unlike the conventional case, the work of attaching the turning die 33 is unnecessary. Moreover, since the positional relationship between the bending guide die main body 35 and the sandwiching die main body 37 can be accurately determined by fitting the guide bush 42 and the guide post 43, the bending guide die 31, the sandwiching die 31 can be easily and quickly mounted. The 32 and the swivel type 33 can be mounted in a regular positional relationship.

In the above embodiment, the bending guide die 31 is attached to the base 23 and the sandwiching die 32 is attached to the elevator plate. However, conversely, the bending guide die 31 is attached to the elevator plate 28, and the sandwiching die 32 is attached to the base plate.
It may be attached to 23.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope such as a motor as the turning drive source.

[Effects of the Invention] As is apparent from the above description, according to the plate bending apparatus of the present invention, the rotary actuator, which is a swivel type swivel drive source, is attached to the sandwiching type, and the swivel type swivel to this swivel drive source. By connecting as much as possible, the sandwiching type and the swiveling type can be unitized, so that the setup time for mounting the type on the base and the movable mounting member can be shortened, which is a practically excellent effect. .

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention, and an enlarged vertical side view of an essential part of FIG. 1, FIG. 2 is a vertical rear view taken along the line II-II in FIG. 1, and FIG. 1 is a view corresponding to FIG. 1 in a bending state, FIG. 4 is a front view of the whole, and FIG. 5 is a view corresponding to FIG. 1 showing a conventional bending apparatus. In the figure, 23 is a base, 24 is a supporting frame, 25 is a plate material, 28 is a lifting plate (movable mounting member), 31 is a bending guide type, 32 is a sandwiching type, 33
Is a swivel type, 34 is a holder, 35 is a bending guide type, 36 is a holder, 37 is a sandwich type, 38 is a rotary actuator (swing drive source), 40 is a swivel holder, 41 is a swivel type, 42
Is a guide bush, and 43 is a guide post.

Claims (1)

(57) [Claims] 1. One of a sandwiching die and a bending guide die, which are arranged to face each other, is attached to a base and the other die is attached to a movable mounting member, and the sandwiching die and the bending guide die provide a plate member therebetween. The plate member is bent by the turning drive source by turning the swiveling die disposed on the side of the sandwiching die around the center of curvature of the bending surface of the bending guide die. For bending along a surface, wherein the rotary drive source is used as a rotary actuator, and the rotary actuator is attached to the sandwiching die,
A plate material bending apparatus, wherein the rotary type is attached to a rotary shaft of the rotary actuator.