JPS5874293A - Butt welding method by laser beam - Google Patents

Abstract

PURPOSE:To perform butt welding by melting a part or the entire surface of the groove faces of materials to be welded to dispose partial penetration or full penetration beads previously near the weld line and to narrow the groove spacing then irradiating and running a laser beam in this groove thereby expanding the permissible groove spacing effectively. CONSTITUTION:A laser beam 3 is irradiated near the groove of either one of materials to be welded, for example, a material 1 to be welded, that is, at about 0.2mm., and is run along the weld line of the materials 1, 2 to melt the material in said part and to form penetration beads 6, thereby narrowing the groove spacing. In the same manner, a beam 4 is irradiated to the other material 2 to form penetration beads 7 thereby narrowing the groove spacing further. A laser beam 5 is irradiated to the narrowed groove spacing and is run along the weld line, whereby the materials are subjected to laser beam welding satisfactorly. If the spacing between the materials 1 and 2 is relatively narrow, it is also possible to narrow the groove spacing by melting the entire groove surface of, for example, the material 1 with the beam 3 and forming full penetration beads 6 on one side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser beam matching S* method, and more specifically, a laser beam matching #I using a high-energy laser beam
′! # When doing a laser beam butt fti welding method that can expand - the most acceptable yoke in the past - f What is difficult is the problem of matching first and ending.Such matching #1
11, in principle.

Although it does not take a beveled part, it is often used as the tip of shear cutting fn1-point 1@ for Kin IIa ridges, etc. Even at this tip, the strength of suppressing the clearance during shearing, and the internal stress in 4. Due to the presence of [? It is thought that there is a difference between Jin and Ashi1 @FX11K that impairs IM performance.However, in laser beam baths, generally speaking, when the first Sekiichi is on the Q2■9 level, S&I -It is not possible to control the cutting force below 01■υ. Therefore, when cutting a metal plate, an expensive jig containing a sheath-tight shear 1 is not recommended. This light.

If you keep a long one of koji in the bath, you will get a very large melting point with 7 coils, - 1 qI with a value of 9 below the previous one.
Isn't there a great deal of effort being put into developing a jig that can
! Development of means to expand the range of noodles available is currently underway.

Yokoyoshi, this allowance is the best means of expansion in history.

...Weaving [1, (2) Defocused beam bath contact,
(3) The insert method has been proposed and implemented, but there are advantages and disadvantages as shown below.
(This is a method of welding by running along the bath body carp while giving a vibrating tube that crosses the ffi police. According to this bath 1 method, the noodles are enlarged and one person heats up. The defocused beam S method (2) is a welding method in which the beam is focused away from the surface of the welded part.

This #& connection method is effective for enlarging the allowable groove distance by 14JI9r for the <Kljl feature. However - this welding method reduces the energy density of the beam;
Reflection from the surface of objects in contact with the object is likely to occur, and in order to obtain a stable bead 1, the absorption rate of Krltl table (2) is set to t-leg, and in order to increase the absorption coefficient, Ktj? Surface treatment is required. In the insert method (3), if all the powder is used, is it effective to insert and hold Yr? ``0g if you have no other means and are using an all-in-one wire strip.
Strange #I4 There is no need for a mechanism to monitor costs.
The impact on the base material due to the heat of the 6m person should be minimized to the extent possible.
fMK has a special system structure (, 5ch* KW
You can enlarge the laser beam by enlarging the yong bei xian guan noodle meeting #! Kaoru proposes a method, that is, 1 method of the present invention, the groove of the material to be welded (
2) - Thoroughly melt the entire #2 mountain and use a partial bath or full bath bead device near the welding area between the bevels.
1-Narrowing the area, irradiating one laser beam into the area, and touching the area with the laser beam is a sign of eating.

I will explain in detail about the 0-hon kabuto method.

Note that FIG. 1 is a layout diagram showing the positional relationship between the first and the first point of contact when the laser beam is intertwined by the conventional method, and FIGS. This is an arrangement showing the positional relationship of the groove grooves when welding.

1.1 In the method of the present invention, - part or all of the brunt s'f
r-bath, and place a partial or full-bath bead in the vicinity of the bath core to narrow the area at once. In order to increase the field, the focus 11 is placed near the surface of the bathed cotton material. Also, the diameter of the laser beam focal spot #f1 is at most (12 x 1).
! ! When the value of -1r exceeds the value t of wrinkles, the beam passes through the gap -1r as shown in FIG.

The arrangement is 111- under 1 When contacting with a normal laser beam, -, the gap between the grooves #k between the pair of *S warning dreams 1.2 (12111υ or larger), the laser beam is #Cannot form a bead that does not cost $12,000 - On the other hand, in the method of the present invention, as shown in Figure IK of #L2, *First, the laser beam 3 is tilted or one of the sf!-
Material, Gae if, # of one side! i1*1's nearest neighbor, neighbor 0
For example, if tfo is irradiated at 211 mtii degrees,
* Run a l + [! 11 awns, #I-containing bead 6 is formed, and the gap between the grooves is narrowed.
Also. This as well as the other? The beam 4 is irradiated onto the l& bath 1#IP2 to form a contact bead 7 and narrow the gap between the grooves.

In addition, as shown in Figure 5112, 0 and 1.2 -1
- Instead of forming a 1'L soaking bead 6.7, as shown in Figure 3, between a pair of #1 materials 1.2 and 1.2, if the space is relatively narrow, it is possible to 7#l log material 10 - The entire tip is melted by the laser beam 3 into #l piece 11 *
It can also be referred to as ``St-Narrow'', which has 6 contact beads and a glossy tip.

Next, 0 or more) K, groove run between a pair of pleated materials 1.2! jk, in both cases after narrowing.

When the laser beam #5 is irradiated and the laser beam #41 # travels along the wrinkles, the laser beam #41 # can be produced well.

By the way, I'm excited about the implementation 0 夾 1 & -1 1 Su, Reishi 3rd stainless steel w @ (5U
8104) 1 River C changed the gap between them,
Matching the dimensions of the cypress wood and using a 4i2 picture cassoulet moxibustion device (output 2 kW), which was formed at the beginning of the warehouse, was done - It
- The tip was thinned at a mouth weight of 0.2 cm, and the laser beam was heated at a rate of 3 strokes/min.It healed at the edge of the laser beam and was oriented in a regular δ direction to form a bonding bead.

In this Ayuto, at the beginning of the butt bevel, that - Hikari 06
1 can be enlarged and 4 connections can be made, 1 t go bath 1 # 1 station
．． It is about 5 g/min, and the allowable gap is 02-root crease.If you compare all of them, you can see that the allowable gap has been greatly expanded by 3 times l.

Implementation N2 Using the same shaking bath welding material and blown acid gas laser oscillator as in Implementation 1, we measured 031111 m from the groove surface of one workpiece 68 on one side of the foot as shown in Fig. 3. 1.
The laser beam was passed through the path at a speed of 5 m x 7 m 1 n to form a bead chamber.

Welding was performed at a contact speed of 1.5 m/min. in this case.

It is possible to join up to the initial groove gap or about 08 Tsuru.

When compared with 1, it was found that the tolerance was increased by a factor of 4.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram showing the groove gap position lIQgh'fr in 6 cases in which the laser beam is in contact with the conventional method, and Fig. 2 is a layout diagram showing the position lIQgh'fr of the groove gap in 6 cases, and Fig. @L' is a direct diagram showing the distance tsm* between the grooves when they are in contact with each other. Code 1.2...Pair of workpieces 3...
・Laser beam 4...Beam 5...Laser beam 6.7...Touch bead % Tochire person 111 Rin Omotetsu Co., Ltd. Agent Masu Matsushita Kazuo Benkun Shi Kagi Junkan Lv? J 箪J fig.

Claims (1)

[Claims] A part or the entire surface of the groove of #I guarding material,
By installing a partial or full bead assembly near the bath, the first section is made smaller. Laser beam irradiation into this groove, j! Laser beam butting #string 1000 &-