JP2000126817A - Device for clamping dies - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for clamping dies which is so constituted that a width of tightening metallic pieces for firmely fixing dies are enlarged, the tightening metallic pieces are almost continuously installed with each other, bending reaction forces at the time of working becomes uniform, and thus being working symmetrically well balanced becomes possible. SOLUTION: Relating to a device for clamping dies of a bending machine P such as press brake, plate-shaped members 2 are arranged at a prescribed plural places in the left and right directions of a long supporting member 1 extending in the left and right directions, engaging this plate-shaped members 2, members 3 for fitting the dies are installed so as to enable firm screw jointing with bolts 2a, and up and down positional fine adjustment of the dies 5 is made possible by up and down fine movement of the members 3 for fitting the dies through a lower surface of a supporting member 1 and a wedge member 4. In such a structure, tightening pieces 6 which make the dies 5 to be held with the members 3 for fitting the dies are made to expand the width in left and right directions, the clearance between the tightening pieces 6 neiboring with each other are minimized, and the tightening metallic pieces 6 have a constitution capable of being continuously installed and fixed so as to approach with each other as near as just before abutting and come to a nearly continuous state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die holding device for a bending machine such as a press brake.

[0002]

2. Description of the Related Art This type of mold gripping device is disclosed in
As disclosed in Japanese Patent No. 3711 and the like, a mold mounting member is fixed, and a movable member that is pressed against the mold mounting member by a biasing force of a spring or the like is provided. Fluid pressure is applied between the fixed mold mounting member and the movable member. There is a configuration including a lever device for moving a movable member away from the movable member.

Further, as known from Japanese Utility Model Publication No. Sho 60-16420, a configuration is known in which a mold adjusting member can be adjusted in a vertical and tiltable manner to perform a correction along a bending correction curve.

[0004] Generally, in a die gripping device in a bending machine such as a press brake, when a plurality of plate-like members called so-called intermediate plates are arranged in a left-right direction on a support member (upper table) which is long in the left-right direction. Usually, a gap necessary for mounting and dismounting the mold is provided, and a fastener for fixing the mold is also generally set to have a width having a similar gap (see FIG. 4A).

[0005]

However, in the above-mentioned conventional example, when a plurality of combined dies including small sized dies are formed due to a gap generated between the adjacent fasteners, the above-described fastening is performed. Depending on the position of the fastening bolt of the metal fitting, it cannot be arranged at the intermediate position of the metal fitting because the small-sized metal mold deviates from the portion to be gripped. If the small mold is incorporated in the end, the layout of the mold may be changed, and furthermore, FIGS. 4 (a) and 4 (b)
As shown in the figure, the mold cannot be arranged symmetrically with respect to the center of the processing machine (in the figure, l ₁図 l
₂ , l ₁ > l ₂ ), and there is a problem that the bending reaction force at the time of processing the work is biased and the bending angle of the product becomes asymmetric (θL> θR in the figure).

The present invention has been made by paying attention to the above-mentioned point, and it is possible to enlarge the width dimension of the fastener for fixing the mold and to make a gap (gap) between the adjacent fasteners. The mold gripping device is designed to be as small as possible, and to be connected continuously so that the fasteners are substantially continuous, so that the bending reaction force at the time of processing the work is uniform, and it is possible to perform symmetrically balanced bending work. The purpose is to provide.

[0007]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) A die holding device for a bending machine such as a press brake, in which plate members are disposed at a plurality of predetermined positions in the left and right direction of a support member that is long in the left and right directions, and are engaged with the plate members. The mold attaching member is provided so as to be screwed and fixed by using a bolt, and the mold attaching member is finely moved up and down via the lower surface of the support member and the wedge member to enable fine adjustment of the vertical position of the mold. In the configuration, the fasteners that enable the mold to be sandwiched between the mold mounting members are widened in the left-right direction, the adjacent fasteners minimize the gap therebetween, and the fasteners approach each other just before contact. A mold gripping device which is configured so as to be installed continuously so as to exhibit a substantially continuous state.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.

FIG. 1 is a front view showing an embodiment of a mold holding device according to the present invention, FIG. 2 is a partially cutaway side view of the mold holding device according to the present invention, and FIG. 3 is a bending machine. FIG. 4A is a schematic front view showing an example of a conventional type, FIG. 4B is a perspective view showing the state of a product after the bending, and FIG. It is a front view showing an example which arranged a metallic mold symmetrically centering on the center of a processing machine.

Referring to the drawings, reference numeral 1 denotes a support member, which corresponds to an upper table of a bending machine, 2 denotes a plate-like member, 3 denotes a mold mounting member, and 4 denotes a wedge member having a scale. Reference numeral 5 denotes a mold, reference numeral 6 denotes a clamp, reference numeral 7 denotes a wedge adjusting bolt, reference numeral 7a denotes an elongated hole, and a plurality of mold mounting members 3 on each of lower surfaces long to the left and right of the support member 1. And a plate-like member (also referred to as an intermediate plate) for connecting and suspending the support member 1 and the mold mounting member 3 vertically using bolts 2a. 2), the upper surface of the mold mounting member 3 which engages with and comes into contact with the wedge member 4 and the lower surface of the wedge member 4 can be slid and inclined with respect to each other. Occasionally, according to the scale engraved on the wedge member 4, the mold mounting member The mold 5 can be finely moved downward to fine-adjust the height of the tip of the mold by fine movement. Then, the fasteners 6 are widened in the left-right direction, and the mutually adjacent fasteners 6 have a minimum gap (gap) g so that the mutually adjacent fasteners 6 are close to each other until they come into contact with each other so that they are substantially continuous. It is configured so that it can be installed continuously so as to exhibit it.

[0012] With other reference numbers, BM is a bending machine.

The operation will be described based on the above configuration.

In a bending machine such as a press brake,
When bending the work, if the left and right ends of the work are already bent, a conventional mold in which the left and right widths of the plate-shaped member (intermediate plate) 2 and the fastener 6 are the same. Although a gripping device may be used, for example, in bending of a long workpiece to the left and right which has not been machined at both ends, the fasteners 6 adjacent to each other have a minimum gap (gap) g and are almost continuous. (See FIGS. 3 and 5), the die 5 can be freely laid out and arranged in accordance with the bending line length of the work to be processed. Since the mold 5 can be mounted symmetrically with respect to the center of the machine body as a base point (in FIG. 5, l ₁ = l ₂ ), a bending reaction force is generated evenly in the work itself, and bending work in which the left-right balance is achieved is achieved. It is possible.

The fine adjustment of the height of the cutting edge of the mold 5 is performed as follows.
With the lower bolt 2a of the plate-shaped member (intermediate plate) 2 slightly loosened and the wedge adjusting bolt 7 loosened, the wedge member 4 is placed on the paper surface of FIG. 1 according to the scale engraved on the wedge member 4. By driving from right to left, the wedge adjustment bolt 7
Is a plate-like member (intermediate plate) 2 according to the movement of the wedge member 4.
The wedge member 4 slides on the inclined upper surface of the mold attaching member 3 engaged with the inclined lower surface of the wedge member 4 so as to be displaced laterally. Due to the effect, a pressing force is generated, and the mold mounting member 3 is slightly moved downward and pressed down, and the cutting edge of the mold 5 is slightly lowered and adjusted in accordance with the scale engraved on the wedge member 4, and then adjusted. The wedge adjustment bolt 7 is tightened, and the lower bolt 2a loosened at the start of the work of the plate-like member (intermediate plate) 2 is further tightened to perform height positioning.

[0016]

According to the present invention, the width of the fastener for fixing the mold is enlarged, the gap (gap) between the adjacent fasteners is minimized as much as possible, and the The workpieces are arranged so as to be substantially continuous, so that the bending reaction force at the time of processing the work becomes uniform, and the symmetrically balanced bending processing can be performed.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a mold gripping device according to the present invention.

FIG. 2 is a partially cutaway side view of the mold gripping device according to the present invention.

FIG. 3 is an overall front view of a press brake as an example of a bending machine.

FIG. 4A is a schematic front view showing an example of a conventional type, and FIG. 4B is a perspective view showing the state of a product after the bending process.

FIG. 5 is a front view showing an example in which the combined dies are arranged symmetrically about the center of the processing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support member (upper table) 2 Plate-shaped member (intermediate plate) 2a Bolt 3 Mold mounting member 4 Wedge member 5 Mold 6 Clamp 6a Tightening bolt 7 Wedge adjusting bolt 7a Long hole g Gap BM Bending Machine

Claims (1)

[Claims] 1. A mold gripping device for a bending machine such as a press brake, wherein a plate member is disposed at a plurality of predetermined positions in a left-right direction in a left-right support member and engaged with the plate member. The mold attachment member is provided so that it can be screwed and fixed using bolts,
In a configuration in which the mold mounting member finely moves up and down through the lower surface of the support member and the wedge member to enable fine adjustment of the vertical position of the mold, the mold can be sandwiched between the mold mounting member. The fasteners are widened in the left-right direction, the fasteners adjacent to each other minimize the gap therebetween, and the fasteners can be connected and attached so that the fasteners approach each other to a point just before abutment and exhibit a substantially continuous state. Characteristic mold gripping device.