JPH04266426A - Bending device - Google Patents

Abstract

PURPOSE:To precisely bend a high rigidity work by rotatively deforming a movable die round a 2nd axial line and supporting the movable die at both ends of the 1st frame on both sides of the 2nd axial line. CONSTITUTION:A semi-circular arc 1st frame 5 is faced down and the movable die 2 is supported at both ends through a pair of horizontal axes 6, 6 at the inside parts of both ends. The movable die 2 is displaced rotatively round the horizontal axis 6 and turns its direction round the axial line extending in the right and left direction. The 1st frame 5 is supported by the 2nd frame 7 on the lower surface of its central part through a vertical axis 8, the 1st frame 5 is displaced rotatively round the vertical line 8 and the movable die 2 turns its direction round the axial line extending in the vertical line. In this way, rigidity between the movable die 2 and the 1st frame 5 is improved. The three dimensional turning motion of the movable die 2 to the high rigidity work is poor in deviation and the work can be bent precisely.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention enables the movable mold to be forcibly connected to a fixed mold and a movable mold placed in front of the fixed mold while a workpiece such as a mold material made of metal such as aluminum, iron, or stainless steel is forcibly conducted. By turning and displacing in three dimensions,
The present invention relates to a bending device that bends the workpiece.

0002

[Prior Art] When long metal materials used for building materials, machine parts, parts for automobiles, etc. are bent in two or three dimensions, it is generally referred to as a multi-bender. There is a tendency for three-dimensional bending machines such as these to be used favorably.

As shown in FIG. 2, this multi-bender has a fixed workpiece (W) having a cross-sectional shape corresponding to the outer peripheral shape of the workpiece (W) and a workpiece passage hole (1a) whose cross-sectional size approximately matches the workpiece size. A mold (1), and a movable mold (2) that is placed at a predetermined position in front of the fixed mold (1), has a similar workpiece conduction hole (2a), and is capable of turning and displacing in three dimensions. The basic component is a work feeder (3) which is placed at the rear of the fixed mold (1) and forcibly transfers the work toward the workpiece passage hole (1a) of the fixed mold (1). be. In this multi-bender, the workpiece (W) is forcibly electrically connected to both mold conduction holes (1a) and (2a) by the feeder (3), and the movable mold (2) is turned and displaced. W) is subjected to bending. As is clear from the above, this multi-bender bending process involves the workpiece (W
), the principle of so-called compression bending, in which the material is bent while being pressed, is predominantly used, so local elongation of the material is relatively small, and bent products with fewer material defects and surface defects can be obtained. It has the following advantages.

By the way, the above-mentioned movable mold (2) has conventionally been supported in the following configuration in order to realize its three-dimensional turning motion. That is, the 1/4 arc-shaped first
Using a frame (51), a movable mold (2) is supported on one side of the frame (51) in a cantilevered state via a horizontal shaft (52) on the upper inner surface of the frame (51). By being rotationally displaced around the horizontal axis (52), the rotational movement is performed around the τ axis extending in the left-right direction as the second axis. Then, using the second frame (53), a quarter-arc-shaped first frame (51) is supported on the lower end of the first frame (51) via the vertical shaft (54), and the first frame ( 51) is rotationally displaced around the vertical axis (54), the movable mold (2) is moved to the third position.
The turning operation is performed around the φ axis extending in the vertical direction as the axis. Furthermore, this second frame (53) is supported by a support base (not shown) and is moved relative to the base, thereby allowing the movable mold (2) to move as a first axis extending in the workpiece conduction direction. The turning operation is performed around the θ axis. As a result, a three-dimensional turning motion of the movable mold (2) is realized.

[0005] Note that the first frame (51
) is equipped with a τ-axis drive motor (55) that rotates the movable mold (2) around the horizontal axis (52) and a τ-axis drive motor (55) that rotates the movable mold (2) around the horizontal axis (52) by using the upper surface space, and a τ-axis drive motor (55) that drives the first frame (51) vertically A φ-axis drive motor (
56) are both arranged.

[0006]

[Problems to be Solved by the Invention] However, in the conventional support structure as described above, the movable mold (2) is supported by the first frame (51) in a cantilevered state, so that the supported state is not rigid. When bending workpieces, especially high-rigidity workpieces with large cross-sections, a large load is applied to the movable mold (2) during electrical conduction of the workpiece, which tends to cause errors in the operating accuracy of the mold (2). However, there was a drawback that bending of such a highly rigid workpiece could not be carried out with high accuracy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-bender type bending apparatus which eliminates the above-mentioned conventional drawbacks and is capable of bending highly rigid workpieces with higher accuracy than before.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a first axis extending in the direction of conduction of the work, and a second axis perpendicular to the first axis at a predetermined position in front of a fixed mold having a work conduction hole. a movable mold supported rotatably around two axes and a third axis perpendicular to both the first and second axes, three-dimensional rotation of the movable mold; In the bending device, the movable mold is rotationally displaceable around the second axis in a bending device that applies a predetermined bend to a workpiece that is sequentially forcibly connected to both mold conduction holes by a displacement operation. , the first frame is supported by the second frame, and the movable mold is supported on both sides by the first frame, and the movable mold is rotatable about the third axis. The gist of the present invention is a bending device characterized in that the second frame is supported by a support base in a mode in which the movable mold is rotatable about the first axis.

[0009]

[Operation] In the above device, since the movable mold is supported by the first frame on both sides thereof, the rigidity between the movable mold and the first frame is increased, and as a result, the movable mold is supported on both sides by the first frame. The rigidity of the entire support structure of the mold is increased, and the deviation of the three-dimensional turning motion of the mold during conduction of the workpiece is reduced. As a result, the workpiece can be bent with high precision.

0010

[Example] Next, an example will be explained.

[0011] The multi-bender type bending device is
As described above based on FIG. 2, the workpiece conduction hole (1a)
A fixed mold (1) having
) and a work feeder (3) located at the rear of the workpiece feeder (3).

[0012] The movable mold (2) is supported in the following configuration in order to realize its three-dimensional turning motion. That is, a semicircular arc-shaped first frame (5) is used, and it is turned downward, and the inner surfaces of both upper ends thereof are
A movable mold (2) is supported on both sides of the movable mold (2) via a pair of horizontal shafts (6) (6). ), the rotational movement is performed around the τ axis extending in the left-right direction. And again, the second frame (7
), on which a semicircular arc-shaped first frame (5) is supported on its central lower surface via a vertical axis (8), and this first frame (5) The movable mold (2) is rotated around the φ axis extending in the vertical direction by being rotationally displaced around the movable mold (2). Further, this second frame (7) is supported by a support base (not shown) and is moved relative to the base, so that the movable mold (2) is turned around the θ axis extending in the workpiece conduction direction. It is assumed that it will be operated.

A τ-axis drive motor (10) and a τ-axis drive encoder are mounted on the upper surface of one upper end of the semicircular first frame (5), and a φ-axis drive motor (11) is mounted on the upper surface of the other upper end. ) and φ-axis drive encoders are arranged in a distributed manner.

As described above, the movable mold (2) is supported on both sides within the semicircular arc-shaped first frame (5), so that the movable mold (2) and the first frame (5) are supported on both sides. 5), and as a result, the overall rigidity of the support structure for the movable mold (2) is increased. Therefore, in order to use this bending device to bend a workpiece with high rigidity, which was difficult to process with high precision in the past, the workpiece (W) is inserted into each mold through hole (1a) (1b). Even when the movable mold (2) is turned and displaced while being forced to conduct, there is very little deviation in the movement of the movable mold (2), so even such highly rigid workpieces can be bent with precision. Can be processed.

[0015] Furthermore, a semicircular arc-shaped frame (5) as described above is used as the first frame (5), and the τ-axis drive motor (10) is mounted on the top surface of one of the upper ends, and the τ-axis drive motor (10) is mounted on the top surface of the other top end. By arranging the φ-axis drive motors (11) in a distributed manner, the weight is balanced, which further improves the movement accuracy of the movable mold (2) and improves the bending accuracy of the workpiece. Further improvements are possible.

[0016]

As described above, in the multi-bender type bending device of the present invention, the movable mold is supported on both sides by the first frame in a dual-supported state.
The rigidity between the movable mold and the first frame is increased, and as a result, the rigidity of the entire support structure of the movable mold is increased. Therefore, there is little deviation in the three-dimensional turning motion of the movable mold even for highly rigid workpieces, and such workpieces can be bent with high precision.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a support structure for a movable mold.

FIG. 2 is a side view showing the basic configuration of the bending device.

FIG. 3 is a front view showing a conventional support structure for a movable mold.

[Explanation of symbols]

1...Fixed mold 1a...Workpiece conduction hole 2...Movable mold 2a...Workpiece conduction hole 5...First frame 7...Second frame

Claims (1)

[Claims] 1. At a predetermined position in front of a fixed mold having a workpiece conduction hole, a first axis extending in the conduction direction of the workpiece, a second axis perpendicular to the first axis, and a pair of the first and second axes are arranged. It has a movable mold that is rotatably supported around each axis with respect to a third axis perpendicular to both, and by the three-dimensional turning and displacement movement of the movable mold, it is possible to sequentially fill the through holes of both molds. In the bending device, the movable mold is rotatably displaceable about the second axis, and the movable mold is supported on both sides by the first frame. The first frame is supported by the second frame and the movable mold is rotatable about the first axis. In the embodiment, the bending device is characterized in that the second frame is supported by a support base.