JPH02241619A - Method for bending plate stock - Google Patents

Abstract

PURPOSE:To secure a satisfactory strength at a bent part by irradiating the V-shaped groove of plate stock with the laser beam, heattreating it and bending the plate stock with its groove inside. CONSTITUTION:A working head provided with a cutting tool 25 is operated suitably to work a V-shaped groove at the bent part of the plate stock W. A working head 57 irradiating the V-shaped groove part with the laser beam LB is operated suitably and the V-shaped groove is irradiated with the laser beam LB having a suitable strength to carry out prescribed heattreatment. An upper die 69 and a lower die 71 of a bending machine are cooperated to bend the plate stock W with the V-shaped groove inside. Thus, a reinforcement member need not be used at the bent part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (1) (Industrial Field of Application) The present invention relates to a method for folding a plate by forming a V-shaped groove in the bent portion of the plate.

(Prior art) Generally, a bending machine is used when bending a plate material, and the bending part of the plate material can be bent by appropriately operating the bending machine and making the upper die and lower die cooperate. can. However, there was a problem in that the bending radius of the bent portion of the bent plate material became large. Therefore,
Conventionally, in order to reduce the bending radius, a method of bending a plate material has been developed, which is characterized by forming a V-shaped groove in the bent part of the plate material and bending the plate material with the groove inside. ing.

(Problem to be solved by the invention) However, if the depth of the figure-7 groove is deep, in other words, V
When the cut group of the letter-shaped groove is deep, the strength of the bent portion of the plate material becomes weak, and if sufficient strength is required, it is necessary to attach a reinforcing member as appropriate. Therefore, there was a problem that bending the plate material was troublesome.

SUMMARY OF THE INVENTION Therefore, in order to solve the above-mentioned problems, the present invention aims to provide a method for folding a plate material that can maintain sufficient strength at the bent portion of the plate material without using a reinforcing member.

[Structure of the Invention] (Means for Solving the Problems) As mentioned above, in order to solve the conventional problems, in the present invention, a V-shaped groove is formed in the bent part of the plate material, Heat treatment is performed by irradiating laser light on the shape of the groove.
The bent portion of the plate material is bent with the V-shaped groove facing inside.

(Function) In the above configuration, a V-shaped groove is formed in the bent portion of the plate material. A heat treatment is performed by appropriately irradiating the V-shaped groove with a laser beam. As a result, it is relatively unlikely that the strength of the bent portion of the plate material will be weakened. Then, the bent portion of the plate material is bent with the V-shaped groove inside.

(Example) The present embodiment will be described below with reference to the drawings.

In order to process a V-shaped groove on the bent part of the plate material W,
A V-shaped groove machining machine 1 as shown in FIG. 2 is used.

To explain the above-mentioned V-shaped groove processing machine 1, the ■-shaped groove processing va1 is equipped with a box-shaped lower frame 3 that extends relatively long in the left-right direction (in the front and back directions toward the paper surface in FIG. 2). , left and right side frames 5 are erected on the left and right sides of the lower frame 3, respectively.

An upper frame 7 is provided above the left and right side frames 5, and a front plate 9 is integrally connected to the upper frame 7.

In other words, ■-shaped groove machining v! 11 is the lower frame 3
It has a structure in which the front plate 9 etc. are arranged above the .

In order to support the plate material W to be processed, a work table 11 is provided on the front side of the lower frame 3 (on the left side in FIG. 2). An auxiliary table 13 is provided via a bracket 15 fixed to the lower frame 3.

A plurality of brackets 17 are appropriately fixed near both the left and right measuring sections on the rear side (right side in FIG. 2) of the lower frame 3. Each of these brackets 17 is provided with a guide rail 19 that extends to a position close to the work table 11, and each of these guide rails 19 is provided with a guide rail 19 for gripping a plate material W to move and position the plate material W. A movable clamp device F21 is supported so as to be movable in the front-back direction.

In order to firmly fix the plate material W to the work table 11 during processing, a plurality of fixing clamp devices 23 are appropriately provided below the front plate 9 in the left and right direction.

In order to form a V-shaped groove on the upper surface of the plate material W which is positioned and fixed by the movable clamp device @ 21 and the fixed clamp device 23, a plurality of detachable cutting tools 25 are installed above the work table 13. Processing head 2 equipped with
7 is provided. Further, the processing head 27 is configured to be movable in the left-right direction via an integrally provided sliding member 29.

More specifically, the front plate 9 is provided with a plurality of guide rails 31 extending in the left-right direction. This guide rail 3
The tilting member 29 is integrally provided with the sliding member 33 which is guided by the sliding member 1 and is movable in the left and right direction.

Further, in order to move the processing head 27 in the left-right direction along the guide rail 31, a threaded rod 35 parallel to the guide rail 31 is provided between the left and right side frames 5. A nut member 37 is provided which is screwed into the threaded rod 35 and is movable in the left and right direction. The nut member 37 is rotated by driving a first servo motor (not shown).

Further, the processing head 27 is configured to be movable in the vertical direction as well.

More specifically, the second servo motor 41 is attached to the upper front side of the sliding member 29 via a motor bracket 39 . The second servo motor 41 is interlocked with a screw rod 43 extending downward, and the processing head 27 has a nut member ( (not shown) is provided.

With the above-described configuration, the movable clamp device 21 that grips the plate is moved to a predetermined position in the front-rear direction along the guide rail 19, and the plate W positioned at a predetermined position on the work table 11 is moved to the fixed clamp device. 23 to securely fix it.

The second servo motor 41 is driven as appropriate depending on the depth of the V-shaped groove to be machined into the bent portion of the plate material W, in other words, the depth of the cutting amount of the predetermined cutting tool 25. The processing head 27 equipped with the cutting tool 25 is moved to a predetermined position in the vertical direction. Then, by appropriately driving the first servo motor to move the processing head 27 in the left-right direction, a V-shaped groove can be formed in the bent portion of the plate material W.

The depth of the V-shaped groove machined in the bent part of the plate material W In other words, when the cutting opening of the cutting tool 25 is deep, for example, when the depth of cut is 2/3 or more of the thickness of the plate material W. In this case, the strength of the bent portion of the plate material W becomes weak. Therefore, in this embodiment, 7
Heat treatment is performed by irradiating the laser beam L8 of appropriate intensity to the letter-shaped groove.

In order to irradiate the figure 7 groove with the laser beam LB, the third
A laser processing machine 45 as shown in the figure is provided.

To explain the laser processing machine 45, the laser processing machine 45 includes a laser oscillator 4 located behind the base 47 (on the right side in FIG. 3) for oscillating the laser beam 1B.
9 is the setting. A pillar 51 is located at the center of the base 47.
is set, and a beam member 53 is attached to the support column 51 in a cantilevered manner.
is the provision. The beam member 53 has a laser oscillator 4
A propagation device 55 is provided to propagate the laser beam L8 oscillated by the beam member 53, and a propagation device 55 is provided at the front fill of the beam member 53 (on the left side when looking at J in FIG. Processing head 5 for irradiating the groove portion in the shape of a letter
7 is a provision. The processing head 57 has a laser beam L8
The processing head 57 not only irradiates the laser beam LB but also
Assist gas is injected as appropriate.

A work table 61 is provided below the processing head 57 on the base 47 for supporting a plate material W having a V-shaped groove processed thereon. The work table 61 mentioned above
is equipped with a first challenge 63 that is movable in the front-rear direction (left-right direction in FIG. 3), and this first challenge 63 includes a clamp device 65 for gripping the plate material W.
A second challenge range 67 is provided so as to be movable in the left-right direction (in the front and back directions as viewed from the paper in FIG. 3).

With the above-described configuration, while the plate material W having a 7-shaped groove is gripped by the clamp device 65, the plate material W is moved to a predetermined position in the front-rear and left-right directions via the first challenge 63 and the second challenge 67. position, and the processing head 57
A figure 7-shaped groove is positioned vertically below. Then, a laser oscillator 49, a propagation device 55, a processing head 57
By appropriately operating the second challenge range 67 and moving the plate material W in the left-right direction, the V-shaped groove of the plate material W is irradiated with the laser beam LB, and a predetermined heat treatment is performed. . Thereby, the strength of the bent portion of the plate material W can be increased.

As described above, after forming a V-shaped groove in the bent portion of the plate material W, the plate material W is bent to a predetermined bending angle with the 7-shaped groove facing inside. In order to bend the plate material W, an upper die 69 (see Fig. 1(d)), a lower die 71 (see Fig. 1(d)),
))) Folding machine-like bending I
m (not shown) is used.

Hereinafter, with reference to FIGS. 1(a) to 1(d), an overview of the configuration of this embodiment, including its effects, will be explained.

When the plate material W (see Fig. 1 (a)) is bent, the plate material W
In order to reduce the bending radius of the bent part, the cutting tool 2
The processing head 27 equipped with a number 5 is operated appropriately to form a 7-shaped groove in the bent portion of the plate material W (see FIG. 1 cb). When the depth of the figure-7 groove, in other words, the depth of the cutting depth of the cutting tool 25 is deep, the strength of the bent part of the plate material W becomes weak, so the processing head that irradiates the laser beam LB 5
7 as appropriate to irradiate the figure 7-shaped groove with a laser beam LB of appropriate intensity to perform the prescribed heat treatment (Fig. 1 (C)
reference). Then, the upper die 69 and lower die 71 of the bending machine work together as appropriate to bend the plate material W so that the V-shaped groove of the plate material W is placed inside (see FIG. 1(d)).

According to this embodiment, by irradiating the V-shaped groove formed in the bent portion of the plate material W with the laser beam LB and performing heat treatment, the bent portion of the plate material W is strengthened without using a reinforcing member. can be made sufficiently strong, and the problem that bending the plate material is troublesome can be solved.

It should be noted that the present invention is not limited to the description of the embodiments described above, and can be implemented in various other forms by making appropriate changes.

[Effects of the Invention] As understood from the description of the embodiments above, according to the present invention, heat treatment can be performed by irradiating a V-shaped groove formed in a bent portion of a plate with a laser beam. This makes it possible to increase the strength of the bent portion of the plate material to a sufficient level without using a reinforcing member, and solves the problem that bending the plate material is troublesome.

[Brief explanation of drawings]

The drawings provide a detailed explanation of the invention and are shown in FIG.
＞～FIG. 1(d) is an explanatory diagram for explaining the present invention in detail. FIG. 2 is a side view of the V-shaped shape processing machine. FIG. 3 is a side view of the laser processing machine. 1... ■-shaped groove machining example 45... Laser processing machine representative Patent attorney Hidekazu Miyoshi 1-V-shaped l1llXI garden 45 - Laser processing machine Fig. 1 (C) 〆Fig. 1 b) Figure 1(d)

Claims (1)

[Claims] Processing a V-shaped groove in the bent part of the plate material, applying heat treatment by irradiating the V-shaped groove part with a laser beam, and bending the bent part of the plate material with the V-shaped groove inside. A method of bending plate materials characterized by: