JPH076982Y2 - Box bending punch die - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a box-bending punch die used when a box is bent by a bending machine such as a press brake.

(Prior Art) Conventionally, for example, when the box shown in FIG. 3 is manufactured, the folding order is as follows: after folding sides A and B, the work is rotated 180 degrees and sides C and D are folded. Bend.

Next, the work is rotated 90 degrees to bend the side E, and the work is further rotated 180 degrees to bend the side F. Like this
When bending E and F, a box bending punch with movable ear molds that can be moved diagonally up and down on both sides of the mold body so that it does not interfere with the flange parts that are bent at sides A and C. Molds are used.

As a typical box bending punch of this type,
The one disclosed in Japanese Patent No. 58-128709 is known. This actual development 58-
The box bending punch die of 128709 publication is composed of a die main body and movable ear dies provided on both sides of the die main body,
The mold body and the movable ear mold are connected with two link members and a horizontal shaft pin.

(Problems to be solved by the invention) By the way, in the box bending punch die as described above,
Since the mold body and the movable ear mold are linked and linked by the book link and the horizontal axis pin head for connection, the shape of the mold becomes large and the range of product processing is narrowed. was there.

In addition, the movable ear mold can be held only by two links while the movable ear mold is in operation and in the lowered state, so that the mold body and the movable ear mold are misaligned or loose. There was also a problem.

The object of the present invention is to improve the above-mentioned problems by connecting the mold body and the movable ear part mold without affecting the shape of the mold, without narrowing the range of product processing, and Another object of the present invention is to provide a punching die for box bending that eliminates the occurrence of looseness and backlash between the main body and the movable ear die.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention provides the above-mentioned structure to the other end of a link member whose one end is pivotally attached near an inclined part formed on the end side of a mold body. A movable ear mold having an inclined portion facing the inclined portion at its end is pivotally provided, and the movable ear mold is shaken relatively diagonally up and down in a direction along the inclined portion of the mold body. A punching die for box bending is provided movably, and a pair of stepped grooves corresponding to each other are provided at respective inclined portions of the die body and the movable ear die, and the movable ear die is provided. Alternatively, a guide plate fixed to one of the step grooves of the die body is provided in the other step portion so as to be movable in a diagonally upward and downward direction, and the movable ear mold or the die provided with the other step groove. Make sure that there is no backlash or misalignment during relative movement of the guide plate on either A pressing plate for pressing is provided.

(Operation) In the above configuration, when the mold body is lowered, the movable ear mold first comes into contact with the workpiece placed on the die,
Stop the descent. When the mold body is further lowered, the link member of the movable ear mold provided on the mold body swings upward with the pivot pin as a fulcrum, and the movable ear mold moves relative to the mold body. It moves relatively obliquely upward and is centered and positioned so that its lower end and the lower end of the mold body coincide with each other. Furthermore, by lowering the mold body,
The work is bent by the cooperation of the die body and the lower end of the movable ear die and the die.

If the mold body is further lowered while the movable ear mold is in contact with the workpiece and is in a stopped state, the movable ear mold swings relative to the mold body and moves relatively obliquely. It will move up and down. At this time, since the guide plate attached to the movable ear mold moves while being regulated in the step groove by the pressing plate, there is no backlash and no deviation. Further, since the mold body and the movable ear mold are connected by one link member, the product range is not narrowed without affecting the shape of the mold.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 and 2, the upper part of the die body 3 of the box-bending punch die 1 is fixed to a press brake body as a bending machine. An inclined portion is formed on the left side of the mold body 3 as shown in FIG. 1, and one end of the link member 7 is pivotally supported by a pivot pin 5 in the vicinity of the inclined portion. ing. A pin 9 is provided on the other end of the link member 7.
The movable ear mold 11 is attached.

The movable ear mold 11 is provided with an inclined portion facing the inclined portion of the mold body 3, and an inclined step groove 11V is formed in the inclined portion. Corresponding to the step groove 11V, a step groove 3V is formed in the inclined portion of the mold body 3.
The step groove 11V and the step groove 3V are processed to have substantially the same depth.

In the step groove 11V and the step groove 3V, a guide plate 13 having a substantially parallelogram shape with a part of the end cut out is provided. The guide plate 13 is appropriate, but in the present embodiment, a movable ear mold is used.
It is attached to the step groove 11V of 11 with a plurality of bolts 15.
The die body 3 on the lower side of the step groove 3V has, for example, a pentagonal shape so as to prevent rattling or displacement when the guide plate 13 moves diagonally up and down as indicated by an arrow in FIG. Shaped presser plate 17 has multiple bolts
Installed at 19.

A long hole 21 extending in the left-right direction is vertically formed at the left end of the punch body 3, and the upper end of the movable ear mold 11 is as shown by the solid line in FIG. Three
Abut on the bottom edge of. In this state, the bolt body 23 is fastened to the mold body 3 and the movable ear part mold 11, and the knock pin 25
A hole 27 for use is opened in the movable ear mold 11 and a knock pin 25 is attached to this hole 27. After the knock pin 25 is mounted in the hole 27, the bolt 23 is loosened and removed.

With the above structure, the movable ear mold 11 is initially at the position indicated by the chain double-dashed line, and when the punch body 3 descends, it first comes into contact with the work on the die and stops descending. When the movable ear mold 11 is in contact with the workpiece and the lowering is stopped, when the punch main body 3 is further lowered, the guide plate 13 attached to the movable ear mold 11 is restricted by the pressing plate 17. And moves relatively diagonally upward, and the movable ear mold 11 reaches the position indicated by the solid line. At that time, since the knock pin 25 is in the hole 21, the movable ear mold 11 is centered and positioned. Further, in FIG. 1, backlash and centering in a direction orthogonal to the paper surface are restricted.

Since the guide plate 13 is regulated by the pressing plate 17 when the guide plate 13 relatively moves in the step groove 3V, it is possible to prevent rattling or deviation when the movable ear mold 11 is moved.

Therefore, the movable ear mold 11 can be easily centered and positioned with respect to the mold body 3, and the bending accuracy can be improved without rattling or displacement during movement.

Although the above description has been made on the structure in which the movable ear mold 11 is provided on the left side of the mold body 3, the mold body 3
The movable ear mold 11 is attached to the right side of the left and right sides symmetrically, and its configuration is almost the same as that of the left movable ear mold 11 described above, and thus detailed description thereof will be omitted.

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

[Effects of the Invention] As will be understood from the above description of the embodiments, according to the present invention, the construction is as described in the utility model registration claim, so that the mold body and the movable ear part metal Since the molds are connected by one link member, the shape of the mold is not affected and the range of product processing is not narrowed.

Further, when the movable ear mold moves relative to the mold body, the guide plate attached to the movable ear mold is guided by the step groove and regulated by the pressing plate, so that there is no backlash or displacement. . Therefore, it is possible to improve the processing accuracy of the bending process.

[Brief description of drawings]

FIG. 1 is a front view showing the left side of a punch die for box bending according to the present invention, and FIG. 2 is a side view in FIG. FIG. 3 is a perspective view of a box showing a folding order of conventional box bending. 1 ... Box bending punch mold, 3 ... Mold body 3V ... Step part, 5 ... Pivot pin 7 ... Link member, 9 ... Pin 11 ... Movable ear part mold, 11V ... Step Groove 13 …… Guide plate, 17 …… Presser plate

Claims (1)

[Scope of utility model registration request] 1. The other end of a link member (7) having one end pivotally attached near the inclined part formed on the end side of the mold body (3),
A movable ear mold (11) having an inclined portion facing the inclined portion at its end is pivotally mounted, and the movable ear mold (11) is provided in a direction along the inclined portion of the mold body (3). ) Is a punch metal mold for box bending, which is provided so that it can be swung relatively obliquely in the vertical direction,
A pair of step grooves (3V, 11) corresponding to the respective inclined portions of the mold body (3) and the movable ear mold (11).
V) is provided, and the guide plate (13) fixed to the step groove (11V) of either the movable ear mold (11) or the mold body (3) is fixed in the other step groove (3V). Of the guide plate (13) on either one of the movable ear mold (11) or the mold body (3) which is provided so as to be movable diagonally in the vertical direction and is provided with the other step groove (3V). Presser plate (1 that suppresses rattling and displacement during relative movement)
7) A punch die for box bending, characterized by being provided with.