JP2002143960A - Wire bending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire bending machine capable of efficiently performing the bending of various shapes. SOLUTION: A plurality of bending die units 20, 23 and 26 are installed in an elevating/lowering manner along a wire feed passage on a work table 12 via bending die elevating/lowering air cylinders 33, 36 and 39, a press die holding base 46 is installed movably in the transverse direction parallel to the wire feed passage on the work table via a reversible horizontal shaft motor 47, a press die holding arm 45 is installed on the press die holding base so that a tip part thereof is movable in the longitudinal direction orthogonal to the wire feed passage in the vicinity of bending dies 21, 24 and 27 of the bending die units, via a reversible vertical shaft motor, and a press die 52 is held to the tip part of the press die holding arm in an attachable/detachable manner to/from a surface of the work table via a press die elevating/lowering air cylinder 53.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine for bending a metal wire into a round shape (arc shape, circular shape), a square shape (a sharp angle, a right angle shape, an obtuse angle shape), and a combination thereof. In particular, a bending unit having a plurality of bending dies attached to a mold base facing a wire feeding (guiding) path extending on a flat surface of a machine frame, and movable across the wire feeding path in the vicinity of the bending unit. The present invention relates to an improvement in a wire bending machine provided with a pressing die.

[0002]

2. Description of the Related Art In a conventional wire rod bending machine, bending dies such as two round pins, square pins, or semi-round pins are separately formed on a mold base according to the form (shape, diameter, ie, size, arrangement, etc.). Either one of the plurality of bending mold units for each of the different bending shapes attached to the wire feed path of the machine frame is installed so as to be freely replaceable, and a pin-shaped press mold is attached to the machine frame. It is attached to a turntable that is rotatably installed around it, and two bends are made by the movement around the bending type unit of the turntable and the movement around the wire rod feed path by the rotation around the bending unit of the push type. The wire portion for feeding and guiding through between the dies is configured to be bent around one of the bending dies forming the bending fulcrum, with one bending die as a bending fulcrum and the other bending die as a bending holding fulcrum.

However, in such a structure in which the bending die and the pressing die are installed so that the latter is rotatable around the former, the moving path crossing the wire feeding path for the bending die, that is, the peripheral portion of the bending die. Since there is only one moving path in, the diameter of the bending mold,
Even if the shape, the mutual arrangement mode is changed, or the diameter of the press die or the mounting position is changed through replacement of the turntable, the gap between the arc-shaped, angular or bent portions having a relatively large radius of curvature is substantially increased. There is a problem that it is only possible to bend a long intermittently bent shape, and it is difficult to bend a short and small shape such as a small-diameter circular shape or a continuously bent shape having a short interval between bent portions.

[0004] Further, the bending die unit must be replaced every time the bending shape of the wire is changed, and there is a problem that the bending efficiency is low.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention includes a small-diameter circular shape having a diameter close to the diameter of a wire, and a short and small shape such as a continuous bent shape having a short interval between bent portions. It is an object of the present invention to provide a wire bending machine capable of bending many shapes, reducing the frequency of replacing a bending die unit, and improving bending efficiency.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an object of the present invention is to provide a plurality of bending mold units, each having a plurality of bending dies, each of which is mounted on a mold base in accordance with a form, by sequentially forming a plurality of bending dies on a flat machine frame. Along the wire feed path extending over the surface, through each separate bending die elevating device installed below the surface of the machine frame, while the bending mold is installed so that it can move up and down across the surface of the machine frame, At the side of the wire feed path on the surface of the machine frame, a push-type holding table is installed via a push-type holder drive so as to be movable in a lateral direction parallel to the wire feed path, and On the mold holder,
The push-type holding arm can be moved vertically through the push-type holding arm drive device, with the tip end near the bending die of multiple bending die units parallel to the surface of the machine frame and perpendicular to the wire feed path. At the end of the press-type holding arm, and hold the press-type up and down perpendicular to the surface of the machine frame via the press-type elevating device, and further sandwich the wire feeding operation. In addition, while controlling the operation of each bending die elevating device so that the bending die occupies the elevating position set for each bending shape, the pressing die holding table driving device, the pressing die holding arm driving device, and the pressing die lifting device are pushed. The solution is provided by a wire rod bending machine provided with a control device for controlling operation so that the die moves through a three-dimensional path defined by the vertical and horizontal directions and the vertical direction of the bending die unit of the bending die unit set for each bending shape. I do.

In the wire rod bending machine of the present invention,
From the point that the pressing die can freely move three-dimensionally in the vicinity of the bending die of the bending die unit, in other words, from the point that the periphery of the bending die can be freely moved two-dimensionally, each bending process By setting an appropriate moving path in relation to the bending type unit for each shape, it is possible to bend various other shapes as well as a small diameter circular shape or a continuous bending shape in which a plurality of bending portions are continuous at short intervals. Processing can be performed.

Further, in this wire bending machine, a plurality of bending die units to be selectively used according to the shape of the bending process are arranged in parallel, so that a plurality of types of bending processes can be performed as they are.

[0009] In order to increase the bending shape of the wire rod, it is desirable that the bending unit in the bending machine be detachably attached to a bending-elevating device so that it can be replaced with various bending units.

The bending mold of the bending mold unit is not limited to a round pin shape for bending such as a conventional round shape, a square pin shape for bending such as a square shape, and a semi-round pin shape, as well as a wavy shape. A block type with a wavy bent part for bending, a free roller type for bending such as large diameter, etc., can be used by attaching to separate mold bases alone or in combination of two or more types. As a bending unit, generally, a unit with a bending shape such as a round pin type, a square pin type, a free roller type, etc. is permanently installed, especially for a standard shape with a high frequency of bending. Replace the permanent one with the one used.

Each bending-type lifting device is constituted by, for example, an air cylinder having a piston with a lifting plate which is connected to an air control valve (including a servo valve and the like) and which detachably mounts a mold base of each bending-type unit. can do.

The pressing die itself can be constituted by a pin type, a free roller type, or the like.
In other words, the optimal size (diameter) in relation to the bending mold
It is desirable to be detachably attached to the push-type elevating device from the viewpoint of selectively using the above.

In general, a push-type holding table driving device is a reversible motor (hereinafter referred to as a reversible motor) which is installed on a side of a wire feed path of a machine frame and drives a push-type holding arm support table to move laterally on the surface of the machine frame. The push-type holding arm driving device is a reversible motor (servo) that is installed on the push-type holding table and moves the push-type holding arm vertically on the surface of the machine frame. The push-type lifting device includes a piston connected to an air control valve (including a servo valve and the like) and directly or indirectly detachably mounting the push-type. It can be constituted by an air cylinder or the like having the same.

The control device is mainly composed of a computer such as a microcomputer, and the operation control of a bending type and a pressing type elevating device and a driving device of a pressing type holding table and a pressing type holding arm are numerically controlled. Automatic control including program control (sequence control) can be performed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a wire bending machine according to the present invention will be described below with reference to the drawings. This embodiment is merely an example, and it goes without saying that the wire bending machine of the present invention can be implemented in various other forms.

In the illustrated embodiment, the wire 11 to be processed is
The reversible wire feeder (not shown), which is operated in a timely manner by the controller 60, moves the flat surface of the processing table 12, which forms the upper part of the front of the machine frame, up and down with the movable blade 16 up and down. The wire is fed to a wire feed path extending in the lateral (left and right) direction through the swingable wire guide 15 and the fixed blade 17.

The processing table 12 is provided with a notch 14 along the wire feed path, and a portion corresponding to the notch 14 is provided with two semi-circle pin-shaped bending dies 21 sequentially from the fixed blade 17 side. , A second bending unit 23 having four round pin-shaped bending dies 24 and a third bending unit 26 having four free-roller-shaped bending dies 27 are installed. The notch 14 itself is provided with the bending die 21 of each bending die unit 20, 23, 26.
Cover plates 29, 3 having mold holes 32 corresponding to 24, 27
0 and 31 are closed flush with the surface of the processing table 12.

Each bending die unit 20, 23, 26 has a bending die lifting air cylinder 33, 36 as a bending die lifting device mounted on the base 13 forming the lower part of the machine frame. , 39 pistons 34, 37, 40
Are detachably attached to elevating plates 35, 38 and 41 fixed to the wire rods via bolts (not shown).
Before or after feeding to the wire feed path of
Air control valves (not shown) of the bending-type elevating air cylinders 33, 36, and 39 set for each bending shape according to 0
2 to occupy the ascending position (the position where the bending die projects above the surface of the processing table) and the descending position (the position where the bending die is retracted below the surface of the processing table) through the control operation (FIG. 2). Here, for the sake of simplicity, a state in which all the bending die units are in the raised position is shown).

On the other hand, the push-type holding base 46 is slidably engaged with a pair of horizontal axis guide rails 42 extending laterally in parallel with the wire feed path on the rear portion of the machine frame on the side of the wire feed path. At the same time, the horizontal guide rail 4 of the machining table 12
2, a horizontal axis reversing motor 47 as a push-type holding table driving device installed adjacent to the base end is screw-engaged with a horizontal axis feed screw 48 extending in parallel with the horizontal axis guide rail 42. 47 can be moved in parallel with the wire feed path by the forward / reverse rotation.

A pair of vertical guide rails 49 extending in the vertical (front-rear) direction orthogonal to the wire feed path are provided on the press-type holding base 46. The arm 45 is slidably engaged, and a vertical reversible motor 50 as a push-type holding arm driving device is installed near the base end of the vertical guide rail 49. The push-type holding arm 45 is screw-engaged with a longitudinal feed screw 51 extending parallel to the longitudinal guide rail 49, and can be moved in a direction orthogonal to the wire feed path by forward and reverse rotation of the longitudinal reversible motor 50. .

Further, the pressing die 52 has a pin shape, and is provided at the tip end of the pressing die holding arm 45 in the vertical (height) direction perpendicular to the surface of the working table 12 of the pressing die lifting air cylinder 53 as a pressing die lifting device. Removable screws (not shown) are attached to the extending piston 54, and the air control valve (not shown) controls the air for the push-type elevating air cylinder 53 so that the vicinity of the bending die units 20, 23, and 26 is achieved. In the section, the processing table 12 and the cover plates 28, 29, 3
0 so that it can move in the height direction so as to be in contact with or separated from the surface.

As a result, for each bending shape applied to the wire rod 11, the bending type lifting air cylinder 3
When the bending die units 20, 23, 26 are moved up and down as set by the control operations as set in 3, 36 and 39 and the feeding state of the wire 11, the pressing die 52 is connected to the horizontal axis reversible motor 47 by the control device 60 and the vertical The control operation of the shaft reversible motor 50 and the push-type lifting / lowering air cylinder 54 is performed so that the bending dies 21, 2 of the predetermined bending die units 20, 23, 26 are formed.
By moving the portions 4 and 27 along a three-dimensional path as set, the wire 11 is bent into a predetermined shape.

In the first bending die unit 20, the right-angled bending process is performed by two-dimensional movement of the pressing die 52 around the bending die 21 across the wire feeding path as shown in FIG. On the other hand, in the second bending die unit 23, as illustrated in FIGS. 4 to 7, the movement of the pressing die 52 around the bending die 25 causes the hook shape, the round shape, the bent hook shape, and the U-shaped. In the third bending unit 26, the bending process shown in FIG.
As shown in (2), by feeding the wire 11 after a slight movement of the periphery of the bending die 27 of the pressing die 52, it is possible to perform an arc-shaped bending process having a very large radius of curvature.

The first, second, and third bending die units 20, 23, and 26 may be provided, for example, as shown in FIGS.
0, a bending pin unit having a round pin-shaped bending die 24 and a double mountain-shaped bending die 55, and a bending pin unit having a round pin-shaped bending die 24 and a square pin-shaped bending die 56 with an inclined surface, etc. For bending such as bent hook shape and acute angle shape.

The wire 11 which has been sequentially subjected to the desired bending in the above-described manner is moved up and down by the movable blade 15 so that the fixed blade 1
6 and separated from the rear part to obtain a desired bent product.

[0026]

As described above, according to the wire bending apparatus of the present invention, in particular, a bending die unit corresponding to each bending shape of a wire and a pressing die in the vicinity of the bending die of the bending die unit. In terms of the movement of the two-dimensional path, bending processing of various shapes including a small diameter circular shape, a continuous bending shape, and the like can be performed.

Also, in view of juxtaposition of a plurality of bending units having different bending shapes and selective use corresponding to each of these bending shapes, it is possible to efficiently perform bending of various shapes. .

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of a wire bending machine according to the present invention.

FIG. 2 is a partially cutaway front view of the embodiment of FIG. 1;

FIG. 3 is a right side view of a main part of the embodiment of FIG. 1;

FIG. 4 is a view showing an example of a bending process of a wire rod by a first bending die unit in the embodiment of FIG. 1;

FIG. 5 is a view showing an example of a bending process of a wire rod by a second bending die unit in the embodiment of FIG. 1;

FIG. 6 is a view similar to FIG.

FIG. 7 is a view similar to FIG. 4;

FIG. 8 is a view similar to FIG. 4;

FIG. 9 is a view showing an example of a bending process of a wire rod by a third bending die unit in the embodiment of FIG. 1;

FIG. 10 is a diagram illustrating a bending form of a wire rod by another bending die unit.

FIG. 11 is a diagram illustrating an example of a bending process of a wire rod by another bending die unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Wire rod 12 Processing table 20 Bending type unit 21 Bending type 23 Bending type unit 24 Bending type 26 Bending type unit 27 Bending type 33 Bending type lifting air cylinder 36 Bending type lifting air cylinder 39 Bending type lifting air cylinder 45 Push type holding arm 46 Push type holding table 47 Horizontal axis reversible motor 48 Horizontal axis feed screw 50 Vertical axis reversible motor 51 Vertical axis feed screw 52 Push type 53 Push type elevating air cylinder 55 Bending type 56 Bending type 60 Control device

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[Procedure amendment]

[Submission date] November 22, 2000 (200.11.
22)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

[0023] In the first bending die unit 20 described above, as you illustrated in FIG. 4, by moving the two-dimensional across the wire feed path of the push-type 52 in the peripheral bending die 21, right-angled bent while it is possible to perform processing, in the second bending die unit 23, as illustrated in FIGS. 5-8, the movement around the bending die 25 of stamping die 52,
Hook-shaped, round-shaped, bent-shaped hook-shaped, can perform U-shaped bend, and in the third bending die unit 26, as shown in FIG. 9, the pressing die 52 bending tool 27 around part of the By feeding the wire rod 11 after a slight movement, an arc-shaped bending process having a very large radius of curvature can be performed.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

[0024] These first, second, third bending die units 20, 23, 26, if necessary, for example, 10 to
11 , a bending unit having a round pin-shaped bending die 24 and a double mountain-shaped bending die 55, or a bending pin unit having a round pin-shaped bending die 24 and a square pin-shaped bending die 56 with an inclined surface, etc.
It is subjected to bending processing such as a bent hook shape or an acute angle shape as shown in the figure.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

The wire 11 which has been sequentially subjected to the desired bending process in the above-described manner is moved up and down by the movable blade 16 to move the fixed blade 1
7 from the rear part to obtain a desired bent product.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] Fig. 6

[Correction method] Change

[Correction contents]

FIG. 6 is a view similar to FIG. 5.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] Fig. 7

[Correction method] Change

[Correction contents]

FIG. 7 is a view similar to FIG. 5 ;

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] Fig. 8

[Correction method] Change

[Correction contents]

FIG. 8 is a view similar to FIG. 5 ;

Claims (4)

[Claims] 1. A plurality of bending mold units, each having a plurality of bending dies, each of which is attached to a mold base by a form, according to a bending shape, are sequentially moved along a wire feed path extending on a flat surface of the machine frame. Through each separate bending-type lifting device installed below the surface of the
While the bending mold is installed so as to be able to move up and down across the surface of the machine frame, the press-type holding table is placed on the side of the wire feed path on the surface of the machine frame via the pressing-type table driving device. , While being installed so as to be movable in the horizontal direction parallel to the wire feed path, the push-type holding arm is placed on the push-type holding base via a push-type holding arm driving device, and the distal end of the bending-type unit is The bending die proximity part is installed so as to be movable in the vertical direction parallel to the surface of the machine frame and perpendicular to the wire feed path, and at the tip of the die holding arm, the die is moved through the die lifting device. , Vertically movable up and down perpendicular to the surface of the machine frame, and further, with the wire feeding operation interposed, actuate each bending die lifting device so that the bending die occupies the lifting position set for each bending process shape Control, and a push-type holding table drive, a push-type holding arm drive, A wire rod provided with a control device that controls the operation of a mold elevating device so that the stamping tool moves through a three-dimensional path defined by the vertical and horizontal directions and the vertical direction of a bending die adjacent portion of a bending die unit set for each bending shape. Bending machine. 2. The wire rod bending machine according to claim 1, wherein the bending die unit is detachably attached to the bending die lifting device. 3. The wire rod bending machine according to claim 1, wherein the pressing die is detachably attached to the pressing die lifting device. 4. A reversible motor for driving the push-type holding table in a lateral direction on the surface of the machine frame, wherein the push-type holding table driving device is installed on a side of the wire feed path on the surface of the machine frame. Including, the push-type holding arm driving device is installed on the push-type holding base,
The wire bending machine according to any one of claims 1, 2 and 3, further comprising a reversible motor that drives the push-type holding arm to move vertically on the surface of the machine frame.