JP2000301245A - Die device for bender - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die device capable of easily forming a long bead, etc., through a bender of a press brake, etc., regardless of a plate thickness of a work. SOLUTION: A die device consists of upper/lower dies 3, 7. One of the upper die 3 and the lower die 7 is made a female die, the other is made a male die, a work abutting face 21 of the female die is formed into a flat or curved face, further, a long forming groove 23 is provided to form the work abutting face 21. In the male die, A work abutting face 33 of a punch holder 31, which is mutually and vertically movably arranged for a fixed holder 25, is formed into a flat or curved face corresponding to the work abutting face of the female die, further a long hole 35 corresponding to the forming groove 23 of the female die is arranged to the punch holder 31, an elastic punch 35, in which its part is protruded from the long hole 35 to the forming groove 23 of the female die when compressed by the fixed holder 25 and the punch holder 31, is arranged between the fixed holder 25 and the punch holder 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die apparatus for bending a plate-like work such as a press brake, and more particularly, to a bending machine such as a press brake. The present invention relates to a mold device capable of easily forming a protruding portion such as a long bead on a plate-shaped work.

[0002]

2. Description of the Related Art Conventionally, a beading process for forming a long bead or the like in a plate-like work is performed by using a female mold having a long forming groove for forming a bead and a long convex portion corresponding to the forming groove. Place a plate-shaped work between the male mold provided,
By engaging the female mold and the male mold, a bead corresponding to the convex shape is formed on the work.

[0003]

As described above, when the female groove is engaged with the male convex portion to form a bead on the work, and when the thickness of the work changes, the outer shape is reduced. Even if the dimensions are the same, the clearance between the female mold groove and the male protrusion must be adjusted, so the size of the male protrusion corresponds to the thickness of the workpiece The problem is that the production and management of the male mold is cumbersome.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and the invention according to claim 1 is based on an upper mold and a lower mold which are mounted on upper and lower tables of a bender. In a mold apparatus for a vender, one of the upper mold or the lower mold is a female mold and the other is a male mold, and the female abutment surface is formed as a flat or curved surface that comes into surface contact with the work. The work contact surface of the punch holder, which is provided so as to be vertically movable relative to the fixed holder in the male mold, is provided on the work contact surface of the female mold. Along with forming and providing a flat surface or a curved surface corresponding to the female work contact surface so that the work can be sandwiched between the punch holder and a long hole corresponding to the female molding groove, Between the fixed holder and the punch holder A portion from the slot to the forming groove direction of the female type is a configuration in which an elastic punch freely projecting when compressed by the said fixing holder and the punch holder.

According to a second aspect of the present invention, in the die apparatus for a bender according to the first aspect, a portion of the elastic punch located between the fixed holder and the punch holder and located in the elongated hole of the punch holder. This is a configuration in which the hardness of the portion is different.

According to a third aspect of the present invention, in the die apparatus for a bender according to the first or second aspect, a portion of the elastic punch located between the fixed holder and the punch holder and the elongated hole of the punch holder are provided. This is a configuration in which a portion located is divided.

According to a fourth aspect of the present invention, there is provided a mold apparatus for a vender comprising an upper mold and a lower mold mounted on upper and lower tables of a bender, wherein one of the upper mold and the lower mold is a female. The male and female molds are used as molds, and the female abutment surface of the female mold is formed as a flat or curved surface that comes into surface contact with the work, and a long molding groove is formed in the work abutment surface, and the female mold is fixed in the male mold. The work contact surface of the punch holder provided to be vertically movable relative to the holder corresponds to the female work contact surface so that the work can be sandwiched between the female work contact surface and the punch holder. The punch holder is provided with an elongated hole corresponding to the female mold groove, and an elastic member disposed between the fixed holder and the punch holder comprises an elastic member disposed between the fixed holder and the punch holder. And compressed by The long tip portion from the hole to the forming groove direction of the female type is structure in which a movable punch protrudes when.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, a mold apparatus according to the present embodiment includes an upper mold 3 removably mounted on an upper table 1 of a bender such as a press brake. The lower mold 5 is detachably mounted on the lower table 5.

In a bender such as a press brake, an appropriate one of the upper table 1 and the lower table 3 is configured as a ram (movable table) that moves up and down, and a plate-shaped work W is disposed on a lower mold 7. The work W is processed by moving the ram up and down to appropriately engage the upper mold 3 and the lower mold 7.

As shown in FIG. 2, the upper mold 3 is provided to be long in the left-right direction (in FIG. 1, the direction perpendicular to the paper surface). The upper mold 3 is provided with an upper mold holder 9 which is detachable with respect to the lower part of the upper table 1. A left and right engaging groove 11 formed on the lower surface of the upper mold holder 9 has a sectional shape. The protrusion 15 provided on the upper part of the T-shaped die holder 13 is engaged. Then, the protruding portion 1
5 is detachably attached as a fixing tool by a plurality of bolts 17 screwed to the upper die holder 9.

In the present embodiment, the upper die 3 is formed as a female die, and a molding die 19 which is long in the left-right direction is integrally attached to the lower surface of the die holder 13. The work contact surface 21 with which the molding die 19 contacts the work W is formed as a flat surface or an appropriate curved surface that makes surface contact with the work W, and the work contact surface 21 has, for example, a long bead or the like. A long forming groove 23 for forming in the work W is formed in the longitudinal direction (left-right direction).

The lower mold 7 is provided with the upper mold 3 as a female mold.
The lower die 7 is provided with a lower die holder 25 as a fixed holder detachably mounted on the lower table 5 in the left-right direction. Are the front and rear sleeve portions 2 that sandwich the upper side of the lower die holder 25 from the front-rear direction (the left-right direction in FIG. 1).
7A, 27B to provide the engagement groove 2 in the left-right direction.
The engaging groove 29 of the punch holder 31 in which 9 is formed is engaged.

A work contact surface 33 where the punch holder 31 comes into surface contact with the work W holds the work W between the work contact surface 21 of the forming die 19 in the upper die 3 as the female die. For this purpose, the female mold is formed on a flat or curved surface corresponding to the work contact surface 21 of the female die, and the contact surface 33 is provided with an elongated hole 35 corresponding to the molding groove 23 of the female die. . The long hole 35 communicates with the engaging groove 29.

An elastic punch 37 made of an elastic member such as urethane rubber is disposed in the engaging groove 29 and the elongated hole 35. The elastic punch 37 may be integrally formed as a whole, but in this example, a first punch portion (a portion located between the fixed holder and the punch holder) 37A located in the engagement groove 29 and a long portion are provided. Hole 3
5, and the first and second punch portions 37A and 37B are different in hardness. In this example, the hardness of the first punch portion 37A is larger than the hardness of the second punch portion 37B, and the corners of the first punch portion 37A are chamfered as shown in FIG. The punch portions 37A and 37B may be integrally bonded.

In order to prevent the punch holder 31 from being pulled out upward, elongated holes 39 formed in a plurality of positions of the lower die holder 25 are formed in a plurality of positions of the sleeve portions 27A, 27B in the front-rear direction. Bolt 41 for retaining
Is installed.

In the above configuration, the work W to be machined is positioned on the punch holder 31 of the lower mold 7 as a male mold, and the upper mold 3 as a female mold is relatively lowered to lower the upper and lower molds. When the work W is pressed by the work contact surfaces 21 and 33 of the mold, and then the upper mold 3 is further lowered relatively, the punch holder 31 is moved to the lower mold holder 2.
5 would be lowered relative to 5.

As described above, when the punch holder 31 is lowered relative to the lower die holder 25, the first punch portion 37A in the engaging groove 29 of the punch holder 31 is compressed, and a part of the first punch portion 37A is elongated. 35 into a long hole 35
The inner second punch portion 37 </ b> B acts to protrude from the long hole 35.

Therefore, a part of the second punch portion 37B in the elongated hole 35 projects from the elongated hole 35 so as to allow a part of the work W to enter the female forming groove 23, and is formed into a part of the work W. Forming processing following the groove 23 is performed. Here, the hardness of the second punch portion 37B is the first punch portion 3
Since the hardness is smaller than the hardness of 7A, it has good copying properties with respect to the forming groove 23 and the like, and can perform good forming.

Further, since the second punch portion 37B is elastically deformed and follows the molding groove 23, it can easily cope with a case where the plate thickness of the work W changes.
Further, a first punch portion 37A and a second punch portion 37B
Is easy to manufacture the elastic punch, and the first punch portion 37A and the second punch portion 3
It is easy to make the hardness different from 7B.

In the above description, a case was described in which a projecting portion such as a bead projecting upward is formed on the workpiece W. However, as shown in FIG. 3, the upper and lower molds are turned upside down and upside down. By adding a slight deformation in response to the above, it is possible to form a protruding portion projecting downward. That is, it is only a relative matter whether the protruding portion protrudes upward or downward. Note that components having the same function are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 4, the second punch portion is formed as a third punch portion 37C made of an appropriate material such as metal or hard plastic.
The shape of the upper part of 7C may be a shape corresponding to the forming groove 23. At this time, the clamping force for clamping the work W by the forming die 19 and the punch holder 31 is increased,
The third punch portions 37 having various heights are formed in order to suppress the appearance of the shape which tends to occur during the forming process of the workpiece W.
It is desirable that C be prepared so that the height difference between the workpiece contact surface 33 of the punch holder 31 and the upper portion of the third punch portion 37C in a normal state can be arbitrarily changed.

[0022]

As will be understood from the above description, according to the present invention, a protrusion such as a bead having the same shape and the same size is formed by using a bender mold such as a press brake. At this time, it can easily cope with a change in the thickness of the work.

[Brief description of the drawings]

FIG. 1 is an explanatory side sectional view of a mold apparatus for a bender according to an embodiment of the present invention.

FIG. 2 is a front explanatory view in which a part of the above is omitted.

FIG. 3 is an explanatory cross-sectional view showing a configuration in a case where the upper and lower parts are inverted.

FIG. 4 is an explanatory side sectional view showing a modified embodiment of the mold apparatus shown in FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 upper table 3 upper mold (female mold) 5 lower table 7 lower mold (male mold) 9 upper mold holder 19 molding die 21 work contact surface 23 molding groove 25 lower mold holder (fixed holder) 29 engagement groove 31 Punch holder 33 Work contact surface 35 Slot 37 Elastic punch 37A First punch portion 37B Second punch portion

Claims (4)

[Claims] 1. A vending apparatus for a vender comprising an upper die and a lower die mounted on upper and lower tables of a bender, wherein one of the upper die and the lower die is a female die and the other is a male die. The female workpiece contact surface is formed as a flat or curved surface that is in surface contact with the workpiece, and a long molding groove is formed in the workpiece contact surface, and the female die is positioned relative to a fixed holder. The work contact surface of the punch holder, which is provided to be vertically movable, is formed into a flat surface or a curved surface corresponding to the female work contact surface so that the work can be sandwiched between the work holder and the female work contact surface. And a slot corresponding to the female mold groove is provided in the punch holder, and the slot is compressed between the fixed holder and the punch holder by the fixed holder and the punch holder. From the female mold A mold apparatus for benders, wherein an elastic punch partly protruding in the direction is provided. 2. The vender mold apparatus according to claim 1, wherein a hardness of a portion of the elastic punch located between the fixed holder and the punch holder is different from a hardness of a portion located in the elongated hole of the punch holder. Mold equipment for vendors, characterized in that: 3. The die apparatus for a bender according to claim 1, wherein a portion located between the fixed holder and the punch holder in the elastic punch and a portion located in the elongated hole of the punch holder are divided. A mold apparatus for a vendor, characterized by having a configuration as described above. 4. A vending apparatus for a vender comprising an upper die and a lower die mounted on upper and lower tables of a bender, wherein one of the upper die and the lower die is a female die and the other is a male die. The female workpiece contact surface is formed as a flat or curved surface that comes into surface contact with the workpiece, and a long molding groove is formed in the workpiece contact surface. The work contact surface of the punch holder, which is provided to be vertically movable, is formed into a flat surface or a curved surface corresponding to the female work contact surface so that the work can be sandwiched between the work holder and the female work contact surface. When the elastic member disposed between the fixed holder and the punch holder is compressed by the fixed holder and the punch holder, a long hole corresponding to the female forming groove is provided in the punch holder. Before the slot A die apparatus for a bender, wherein a punch having a tip portion protruding in a molding groove direction of the female mold is provided.