JP2018001605A - Laser deposition method of optical transparent resin and laser deposition device of optical transparent resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome problems with conventional laser deposition device that deposition cannot be conducted well without large output laser output means, continuous deposition of long sized optical transparent resin material cannot be conducted, deposition quality is not uniform and productivity is bad.SOLUTION: By using a reflection jig having surfaces with a reflection surface which reflects a laser light respectively, a recess groove having a cross section shape corresponding to an outer periphery shape of a first resin material and a wall part formed at upper of both sides of the recess groove, the first resin material and a second resin material through which the laser light penetrates are mounted on the recess groove, a reflection lid having the reflection surface facing the recess groove of the reflection jig is mounted, the laser light is applied to the recess groove by a laser irradiation means, the laser light passed through the first resin material and the second resin material is repeatedly reflected between each reflection surface of the wall part and the reflection lid, the first resin material and the second resin material are heated and deposited.SELECTED DRAWING: Figure 1

Description

The present invention relates to a laser welding method and a laser welding apparatus for welding by irradiating two or more light transmissive resins by irradiating a laser beam, and in particular, a first hollow tube or tubular hollow that is a light transmissive resin. The present invention relates to a laser welding method and a laser welding apparatus for welding a resin material, a hollow resin material such as a tube or tube inserted into the first resin material, or a solid second resin material such as a rod. .

Conventionally, a hollow first resin material such as a cylinder or a tube, which is a light-transmitting resin, and a hollow resin material such as a tube or a tube inserted into the first resin material or a rod As a laser welding method for welding the actual second resin material, a method of welding using a reflecting jig having a concave groove, invented by the applicant, is known (for example, see Patent Document 1). According to this method, it is possible to perform laser welding of a medical resin material such as a nasal cannula or a catheter, and it is possible to weld various light transmissive resin materials by irradiating laser light.
That is, in this laser welding method, the outer peripheral surface of the lower half of the first resin material 1 is subjected to reflection treatment with the second resin material 2 inserted into the first resin material 1 as shown in FIGS. 26A and 26B. As shown in FIG. 27, the laser beam 6 is applied to the first resin material 1 and the second resin material 2 placed on the recess groove 3a from the laser beam irradiation means 5 as shown in FIG. Irradiate. Then, the laser beam 6 that has passed through the first resin material 1 and the second resin material 2 is reflected by the surface of the recess groove 3a, and the first resin material 1 and the second resin material 2 are passed and reflected. repeat. The laser beam 6 is absorbed by the first resin material 1 and the second resin material 2, and the first resin material 1 and the second resin material 2 generate heat and are welded to each other.
However, in the conventional laser welding apparatus, reflection of laser light in the same plane as the cross section of FIG. 27 has been well studied, but the so-called first resin material 1 and second perpendicular to the cross section of FIG. The reflection of the laser beam in the longitudinal direction of the resin material 2 has not been sufficiently studied. That is, (A) the laser beam is concentrated at one point in the longitudinal direction of the first resin material 1 and the second resin material 2, or (B) the laser beam is focused on the first resin material 1 and the second resin material. Whether or not it is concentrated in a range of a certain length in the longitudinal direction of the material 2 or (C) whether the laser beam is moved in the longitudinal direction of the first resin material 1 and the second resin material 2 has been deeply studied. There wasn't.
For this reason, the energy of the laser light source is not sufficiently utilized, and a high-power laser output device is required. Although laser welding limited to the laser beam irradiation range can be performed, it has been difficult to continuously and uniformly weld a long tubular light-transmitting resin material such as a pipe over a long range. The temperature of the reflecting jig was not constant, and the welding quality such as laser welding strength was not uniform. It took time for the reflecting jig to radiate heat and return to a constant temperature, and the laser welding cycle time was long, resulting in poor productivity.

As another conventional example, as shown in FIG. 28 and FIG. 29, a first resin material and a second resin material are surrounded by a non-contact reflective surface, and laser light is emitted from the opening of the reflective surface. A method of welding the first resin material and the second resin material is also known.
Incidentally, in FIG. 28, the tube wall of the tube part is constructed from at least two material layers 100, 200 having different heat absorption characteristics, and one of these layers has at least a partial area with excellent heat absorption characteristics for laser radiation. In preparation. The tube portion is surrounded by the mirror 300 in a non-contact manner. When the laser beam 600 from the laser irradiation means 500 is reflected by the mirror 300 and repeatedly irradiates the tube portion, heat is generated. Is done.
In FIG. 29, the tubular part 110 and the absorbing plastic part 210 are welded by irradiating with a laser beam 610. The tubular part 110 and the absorbing plastic part 210 are surrounded in a non-contact manner by the cylindrical mirror 310, and the cylindrical mirror 310 reflects the dispersed laser light 610 and transmits the dispersed laser light to the tubular part 110 and the absorbing plastic part 210. Recirculate. As shown in FIG. 29, the cylindrical mirror 310 is shaped so that the laser light continues to be re-reflected and finally incident from all directions around the tubular part 110 and the absorbing plastic part 210 to which the laser light is welded. have. When the reflection of the laser beam is repeated, the tubular part 110 and the absorbing plastic part 210 are welded. However, the reflection of the laser beam in the longitudinal direction of the first resin material 100 (110) and the second resin material 200 (210) perpendicular to the planes of the sectional views of FIGS. It was not examined. And said problem was not solved (for example, refer patent document 2, 3).

As another conventional example, the first resin material 120 and the second resin material 220 shown in FIG. 30 are sandwiched between a pair of mirrors 320 and 330, and the first resin material 120 and the second resin material 220 are obliquely viewed. A method of welding the first resin material 120 and the second resin material 220 by irradiating laser light is known.
However, the reflection of laser light in the depth direction on the paper surface of the first resin material 1 and the second resin material 2 perpendicular to the cross section of FIG. And said problem was not solved (for example, refer patent document 4).
Eventually, with the conventional laser welding apparatus, as described above, laser welding can only be performed in a product-by-product manner. That is, in order to perform laser welding of two or more light transmissive resins in a mass production, welding cannot be performed well without a large output laser output means, continuous welding of a long light transmissive resin material cannot be performed well, Various problems for using the laser welding apparatus in mass production, such as non-uniform welding quality and poor productivity, remain unsolved.

JP 2013-202876 A Special table 2009-532236 Special table 2010-527296 Japanese Unexamined Patent Publication No. 2011-5816

The present invention uses the energy of the laser light source by using a new technology for reflecting the laser light in the short direction (cross-sectional direction) and the long direction (axial direction) of the first resin material and the second resin material. It is an object of the present invention to provide a problem solving means that can improve laser welding and enable laser welding with a small output laser output means.
And it aims at solving various conventional incidental problems based on such problem solving means. That is, it is possible to uniformly weld a certain range length in the longitudinal direction of a long light transmitting resin material, stabilize the temperature of the reflecting jig and the reflecting lid, and improve the welding quality such as laser welding strength. Lasers that can be used in mass production, such as making it possible to cool the reflecting jig in a short time, shortening the cycle time of laser welding, and improving productivity. An object is to provide a welding method and a laser welding apparatus.

  A laser welding apparatus according to the present invention is a laser apparatus in which a light-transmissive first resin material and a second resin material are brought into contact with each other, and these first and second resin materials are laser-welded. The first resin with a light irradiation means and a cross-sectional shape corresponding to the outer peripheral shape of the first resin material, the surface forming a reflective surface for reflecting laser light, and the second resin material in contact with the first resin A reflection jig having a recess groove on which a material can be placed and can be received; and a wall portion on both sides above the recess groove, the surface of which forms a reflection surface that reflects laser light, and the reflection jig And a reflecting surface having a laser beam passage hole through which the laser beam generated by the laser beam irradiating means is passed and mounted on the wall portion. However, the laser beam generated by the laser beam irradiation means is the laser beam of the reflection lid attached on the wall portion. Laser light that has passed through the first resin material and the second resin material by being irradiated toward the first resin material placed in the concave groove with the second resin material in contact with the second hole. Is configured to heat and weld the first resin material and the second resin material while repeatedly reflecting the concave groove, the wall, and the reflective surface of the reflective lid.

With this configuration, the laser beam is repeatedly directed toward the first resin material and the second resin material between the concave groove and the reflection surface of the reflection jig and the reflection surface of the reflection lid. The problem of enabling predetermined laser welding with a laser output means with a small output by reflecting and improving the use of energy of the laser light source is solved.
In the laser welding apparatus of the present invention, the reflecting surface of the reflecting lid is made spherical so that the laser beam is reflected so as to be concentrated near the center of the laser beam irradiation in the longitudinal direction, or the reflecting surface of the reflecting lid is made to have a cylindrical surface and an inclined surface. In a combined form, the laser beam is concentrated in a certain length range near the center of the laser beam irradiation in the longitudinal direction. In addition, the laser beam irradiation means is placed on the reflection lid so that it can move along the reflection jig.

With this configuration, a long light-transmitting resin material can be welded by efficiently using the energy of the laser light source. In addition, the laser beam is moved along the reflecting jig to which the light transmissive resin material is fixed, thereby solving the problem that the light transmissive resin material of a long object can be uniformly welded in a long range in the longitudinal direction. .
The laser welding apparatus of the present invention is provided with a temperature control means and a temperature sensor in the reflection jig or the reflection lid, and the laser beam output level or the reflection treatment of the reflection lid depends on the temperature detected by the reflection jig or the reflection lid. Controls the moving speed of the tool.

With this configuration, the temperature of the reflecting jig, the reflecting lid, the first resin material, and the second resin material is controlled so that laser welding is performed within a certain temperature range. It solves the problem that enables uniform welding quality.
In the laser welding apparatus of the present invention, a cooling means is provided in the reflecting jig or the reflecting lid, and the cooling means is controlled by the temperature detected from the reflecting jig or the reflecting lid, so that the reflecting jig or the reflecting lid is controlled. To cool down.

  By configuring in this way, the problem that makes it possible to shorten the temperature cycle time from when the reflecting jig and the reflecting lid are heated to when they are cooled and to increase the productivity of laser welding is solved. Yes.

  The present invention makes it possible to supply a laser welding apparatus in which laser light is repeatedly reflected between a reflection jig and a reflection lid to improve the use of energy of a laser light source, and a continuous light-transmitting resin material is continuously provided. Laser welding equipment that can be uniformly welded can be supplied, laser welding equipment with improved uniformity of laser welding quality can be supplied by controlling the temperature, and the temperature cycle of laser welding can be shortened by cooling means Thus, it is possible to supply a laser welding apparatus with improved laser welding productivity.

1 is a cross-sectional view of a main part of a laser welding apparatus according to a first embodiment of the present invention. The figure which showed the locus | trajectory of the laser beam at the time of laser beam irradiation to the principal part sectional drawing shown in FIG. The principal part sectional drawing in alignment with the longitudinal direction of the resin material to be welded which showed the locus | trajectory of the laser beam at the time of laser beam irradiation of the laser welding apparatus of Embodiment 1 of this invention. 1 is an external perspective view of a laser welding apparatus according to a first embodiment of the present invention. Sectional drawing which shows the 1st modification of the laser welding apparatus of Embodiment 1 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. Sectional drawing which shows the 2nd modification of the laser welding apparatus of Embodiment 1 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. The external appearance perspective view which showed the 3rd modification of the laser welding apparatus of Embodiment 1 of this invention. The top view which showed the 4th modification of the laser welding apparatus of Embodiment 1 of this invention. The principal part sectional drawing which showed the 5th modification of the laser welding apparatus of Embodiment 1 of this invention. The figure which added the locus | trajectory of the laser beam at the time of laser beam irradiation to the principal part sectional drawing of FIG. 9A. Sectional drawing which shows the laser welding apparatus of Embodiment 2 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. Sectional drawing which shows the laser welding apparatus of Embodiment 3 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. Sectional drawing which shows the 1st modification of the laser welding apparatus of Embodiment 3 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. Sectional drawing which shows the 2nd modification of the laser welding apparatus of Embodiment 3 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. Sectional drawing which shows the 3rd modification of the laser welding apparatus of Embodiment 3 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. The external appearance perspective view when performing the laser welding operation | work of the laser welding apparatus of Embodiment 4 of this invention. The principal part sectional drawing which shows the locus | trajectory of the laser beam at the time of laser beam irradiation of the laser welding apparatus of Embodiment 4 of this invention, and follows the longitudinal direction of the resin material to weld. The external appearance perspective view when the laser welding apparatus of Embodiment 5 of this invention is shown and the laser welding operation | work is being performed. The figure which showed the locus | trajectory of the laser beam at the time of laser beam irradiation in the principal part sectional drawing of FIG. The flowchart which showed the operation | movement procedure of the laser welding apparatus of Embodiment 5 of this invention. The principal part sectional drawing which showed the modification of the laser welding apparatus of Embodiment 5 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. The flowchart which showed the operation | movement procedure of the modification of the laser welding apparatus of Embodiment 5 of this invention. Sectional drawing which shows the laser welding apparatus of Embodiment 6 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. Sectional drawing which shows the laser welding apparatus of Embodiment 7 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. The principal part sectional drawing which added the locus | trajectory of the laser beam at the time of the laser beam irradiation which shows the laser welding apparatus of Embodiment 8 of this invention. Sectional drawing which shows the laser welding apparatus of Embodiment 9 of this invention, and added the locus | trajectory of the laser beam at the time of laser beam irradiation. The exploded perspective view which showed the conventional laser welding apparatus and showed the positional relationship of the 1st resin material, the 2nd resin material, and a reflective jig. The perspective view which showed the state which mounted and showed the 1st resin material and the 2nd resin material on the reflective jig with the conventional laser welding apparatus. The principal part sectional drawing which showed the locus | trajectory of the laser beam at the time of laser beam irradiation of the conventional laser welding apparatus. The other principal part laser welding apparatus is shown and principal part sectional drawing of the apparatus. The principal part sectional drawing which added the locus | trajectory of the laser beam at the time of laser beam irradiation which shows the other conventional laser welding apparatus. The conventional laser welding apparatus is shown, and the principal part sectional drawing of the apparatus is shown.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 shows a laser welding apparatus according to Embodiment 1 of the present invention. The positional relationship among a first resin material 1, a second resin material 2, a reflecting jig 3, a reflecting lid 4, and a laser beam irradiation means 5 is shown. It is the principal part sectional drawing shown. However, a control device and a power supply device for outputting laser light are not shown.
In FIG. 1, the tubular first resin material 1 and the second resin material 2 to be welded are in a state where the second resin material 2 is inserted into the first resin material 1 and in contact with each other. 3 in the recess groove 3a. The cross-sectional shape of the concave groove 3 a that receives the resin material of the reflecting jig 3 is a semicircular shape that is in close contact with the outer periphery of the lower half of the first resin material 1, and contacts the outer periphery of the first resin material 1. There are wall portions (W) above both sides of the recessed groove 3a. In FIG. 1, wall portions (W) having slopes 3 b and 3 c that open above the recessed grooves 3 a are formed so as to expand toward the openings.
The material of the reflecting jig 3 is a metal material that reflects laser light, such as aluminum. The surfaces of the concave groove 3a of the reflecting jig 3 and the inclined surfaces 3b and 3c of the wall (W) are mirror surfaces and reflect the laser light. As a method of making the surface of the concave groove 3a and the inclined surfaces 3b, 3c into a mirror surface, a method of mirror polishing the surface of the aluminum block, a method of applying a mirror tape (T) in which the surface is an aluminum foil and an adhesive is applied to the back surface, There are a method of metal plating the surface, a method of metal vapor deposition on the surface, a method of coating the surface, and the like.
In FIG. 1, a thin mirror tape (T1, T2) of aluminum that reflects laser light is applied to the concave groove 3a of the reflecting jig 3, the inclined surfaces 3b, 3c of the wall (W), and the surface of the reflecting lid 4, respectively. The figure is shown with the foil side facing up. In FIG. 1, the thickness of the mirror tape (T1, T2) is shown to be thicker than the actual one for understanding the invention.
In FIG. 1, the outer peripheral surface of the lower half from the center of the tubular first resin material 1 is in close contact with the concave groove 3 a of the reflecting jig 3. The outer peripheral surface of the upper half of the first resin material 1 faces the reflective lid 4 with the space 3d interposed therebetween. On the reflection jig 3, the reflection lid 4 is detachably mounted with the reflection surface 4a facing down. The reflecting surface 4a is made of a spherical surface that connects the tips of the slopes 3b and 3c of the wall (W) of the reflecting jig 3 in an arch shape. The surface of the reflecting surface 4a is a mirror surface, and in FIG. 1, like the reflecting jig 3, a thin aluminum mirror surface tape (T1) that reflects laser light is attached with the aluminum foil surface facing up. Show.
In FIG. 1, the center O ₁ of the spherical surface of the reflecting surface 4 a of the reflecting lid 4 is matched with the center O ₂ of the tubular first resin material 1 and the second resin material 2. For the purpose of understanding the invention, the distances from the center O ₂ of the outer peripheral surfaces of the tubular first resin material 1 and second resin material 2 are shown as radii R _{1 and} R _{2 ,} respectively, and reflecting surfaces having _a spherical shape The distance from 4a and the center O ₁ is shown as radius R ₃ .
In FIG. 2, the locus of the laser beam 6 when the laser beam is output from the laser beam irradiation means 5 of FIG. 1 is indicated by a one-dot chain line. A laser beam passage hole 4 b is formed at the upper center of the reflection lid 4. The laser beam irradiation means 5 is placed on the reflection lid 4 so that the laser beam 6 is irradiated toward the first resin material 1 and the second resin material 2 through the laser beam passage hole 4b.
The diameter D of the laser beam passage hole 4b is exaggeratedly large in FIGS. 1 and 2, but actually, the size and material of the first resin material 1 and the second resin material 2, and laser beam irradiation. It is determined by the output of the means 5 or the like. The laser light 6 generated by the laser light irradiation means 5 is applied to the first resin material 1 and the second resin material 2 placed in the concave groove 3 a of the reflection jig 3.
In FIG. 2, the laser beam 6 generated by the laser beam irradiation means 5 passes through the first resin material 1 and the second resin material 2 as the laser beam 6 a and is reflected by the concave groove 3 a of the reflection jig 3. Then, the laser beams 6b and 6c are sequentially refracted to reach the reflecting surface 4a of the reflecting lid 4, and reflected by the reflecting surface 4a of the reflecting lid 4, and again, the concave groove 3a and the wall (W) of the reflecting jig 3 are reflected. Heading to slopes 3b and 3c.

  The laser beam 6 is reflected by the concave groove 3a of the reflecting jig 3, the slopes 3b and 3c of the wall (W), and the reflecting surface 4a of the reflecting lid 4. However, since the reflectance is not 100%, Some are absorbed. The reflecting jig 3 and the reflecting lid 4 in FIG. 1 are formed by cutting an aluminum block, have a certain heat capacity, generate heat by absorbing the laser beam 6, and retain heat, and are radiated from the outer surface. The

  The first resin material 1 and the second resin material 2 generate heat by absorbing the laser light in a proportion corresponding to the transmittance (or absorption rate) of the laser light. Further, if the surface roughness of the contact surface between the first resin material 1 and the second resin material 2 is rough, the laser beam is slightly on the contact surface between the first resin material 1 and the second resin material 2. Heat is reflected from the gap. And the 1st resin material 1 and the 2nd resin material 2 fuse | melt at a contact surface, and will solidify and weld when the irradiation of a laser beam is complete | finished after that.

In particular, when the welding strength is required, the contact surfaces of the first resin material 1 and the second resin material 2 are preferably roughened in advance. As a roughening method, for example, one of the contact surfaces of the first resin material 1 and the second resin material 2 is finely uneven with sandpaper, or a metal knurl with a texture is pressed to make fine unevenness, What is necessary is just to give a fine unevenness with a shaping | molding die at the time of one shaping | molding of the 1st resin material 1 or the 2nd resin material 2, or to give a fine unevenness by sandblasting. The laser light is surely reflected and generated in a small gap of fine irregularities on the contact surface of the first resin material 1 and the second resin material 2, and solidifies and welds when the irradiation of the laser light is finished.
If the laser beam is irradiated once, so much heat generation cannot be expected, but in the present invention, the laser beam passes many times due to the repeated reflection of the laser beam. The first resin material 1 and the second resin material 2 each absorb laser light and generate heat. If there are very fine irregularities on the contact surfaces of the first resin material 1 and the second resin material 2, they are repeatedly reflected on the contact surfaces with very fine irregularities and generate heat.
In the present invention, even if the contact surface of the first resin material 1 and the second resin material 2 is roughened in advance, the roughening is only required to give very fine irregularities. If it is very fine unevenness, there is an advantage that the weld surface becomes transparent by melting due to heat generation.
FIG. 3 is a cross-sectional view of the first embodiment of the present invention cut along the longitudinal direction of the tubular first resin material 1. Since the first resin material 1 and the second resin material 2 have a length in the longitudinal direction, isolation walls 4c and 4d are provided at both ends in the longitudinal direction of the reflecting lid 4 (left and right ends in FIG. 4). . The isolation walls 4c and 4d occupy a space from the lower surface of the reflective lid 4 to the outer peripheral surface of the upper half of the first resin material 1, and the outer periphery of the upper half of the reflective lid 4 and the first resin material 1 The space 3d facing the surface is separated in the longitudinal direction so that the heat and the laser beam 6 do not escape to the outside. The inner surfaces of the separating walls 4c and 4d connected to the reflecting surface 4a are mirror surfaces. FIG. 3 shows that, like the reflective surface 4a, a thin mirror tape (T1) made of aluminum is attached to the inner surfaces of the separating walls 4c and 4d with the aluminum foil surface facing up.
In FIG. 3, the laser light 6 transmitted through the first resin material 1 and the second resin material 2 out of the laser light 6 generated by the laser light irradiation means 5 is reflected by the concave groove 3 a of the reflection jig 3. The locus when it goes to the outside just below the laser beam transmission hole 4b is shown by a one-dot chain line. When the laser light 6 transmitted through the first resin material 1 and the second resin material 2 is reflected by the concave groove 3a of the reflecting jig 3 and goes to the outside directly below the laser light transmission hole 4b, the first After passing through the resin material 1 and the second resin material 2, the light is reflected by the reflection surface 4 a of the reflection lid 4 and goes directly below the laser light transmission hole 4 b, that is, toward the center of the laser light irradiation range. As described above, when the spherical reflecting surface 4a is formed on the reflecting lid 4, even if the first resin material 1 and the second resin material 2 are long in the longitudinal direction, the laser beam 6 is irradiated with the laser beam. Collect in the center of the irradiation range. This is an effect unique to the present invention, which was not found in conventional laser welding apparatuses.
FIG. 4 is an external perspective view of the laser device according to the first embodiment of the present invention. 2 to 4, the laser beam 6 from the laser beam irradiation means 5 irradiated toward the first resin material 1 and the second resin material 2 is reflected by the reflection jig. The concave portion 3a, the slopes 3b and 3c of the wall (W) and the reflecting surface 4a of the reflecting lid 4 are repeatedly reflected, but the first resin material does not diffuse outward from the center of the irradiation range of the laser beam 6. It is understood that the longitudinal directions of the first and second resin materials 2 also gather at the center of the irradiation range of the laser light 6.
Thus, the laser welding apparatus of the present invention repeatedly reflects the laser beam 6 output from the laser beam irradiation means 5 and repeatedly irradiates the first resin material 1 and the second resin material 2 with the laser beam. ing. And the utilization of the energy of a laser light source as the energy of laser welding is improved, and the subject of realizing laser welding required with a low-power laser welding apparatus is solved.
As the laser welding apparatus of the present invention, a laser welding apparatus that laser welds the first resin material 1 and the second resin material 2 that are light transmissive resins has been described. However, the laser beam has a high transmittance, and most of the laser beam is transmitted and a part of the laser beam is absorbed. Therefore, a certain amount of laser beam is transmitted, but a certain amount of laser beam is absorbed. It can also be applied to those with a relatively low rate.
(First Modification of Embodiment 1)
Center O ₂ of the center O ₁ and the first resin member 1 and the second resin material 2 of the spherical reflecting surface 4a of the reflective lid 4 described above may be shifted in the vertical direction. If move the center O ₁ of the spherical reflecting surface 4a upward, the light reflection of the laser beam is gathered upward. By utilizing this fact, the first resin material 1 and the second resin material 2 have long cross sections as in the first modification of the laser welding apparatus of the first embodiment shown in FIG. Sometimes, the center O ₁ of the spherical surface is moved upward, and the reflected light of the laser light is collected at the upper and lower centers of the first resin material 1 and the second resin material 2 to average the heat generation temperature as a whole. Can do.
If the center O ₁ of the spherical surface is moved downward, the reflected light of the laser light gathers below the first resin material 1 and the second resin material 2. When the cross sections of the first resin material 1 and the second resin material 2 are elliptical with a short axis up and down, the center O ₁ of the spherical surface is moved downward, and the first resin material 1 and the second resin material The reflected light of the laser beam can be collected at the upper and lower centers of 2 to average the heat generation temperature as a whole. The method of shifting the center O ₁ of the spherical surface of the reflecting surface 4a of the reflecting lid 4 may be set so as to be empirically optimized from the actual laser welding result.
(Second Modification of Embodiment 1)
FIG. 6 shows a cross-sectional view of the main part showing the locus of the laser beam during the laser beam irradiation of the second modification of the first embodiment of the present invention. In the second modification of the first embodiment, the portion 3A of the reflecting jig 3 cut out of the aluminum block is made the height of the recessed groove 3a, that is, the lower half of the first resin material 1 in contact with the recessed groove 3a. The portion 3P of the wall (W) beyond that is made of plastic, and a mirror tape (T2) for reflecting laser light is pasted on the surface. The reflecting lid 4P is also made of plastic, and a mirror surface tape (T1) for reflecting laser light is pasted on the surface.
The reflecting jig 3 and the reflecting lid 4 in FIG. 1 are formed by cutting an aluminum block, have a certain heat capacity, generate heat by absorbing the laser beam 6, and retain heat, and are radiated from the outer surface. This is as already explained. Even in the reflection jig 3 of the second modification, the portion 3A below the concave groove 3a is directly irradiated with laser light from the laser light irradiation means 5 and becomes high temperature. However, the wall portion (W), which is the portion 3P above the concave groove 3a, and the reflective lid 4P receive the laser light reflected once or more. Therefore, if the heat is dissipated in the same manner as the portion 3A below the concave groove 3a, a temperature difference is generated.
Therefore, in the second modification of the first embodiment, the portion 3A of the reflecting jig 3 cut out of the aluminum block is made to be the height of the concave groove 3a, that is, the first resin material 1 that comes into contact with the concave groove 3a. It is assumed that the height of the outer peripheral surface is half, the wall portion (W) 3P above the concave groove 3a is made of synthetic resin (plastic), and a mirror surface tape (T2) for reflecting laser light is pasted on the surface. Yes. The reflection lid 4P is also made of synthetic resin, and a mirror surface tape (T1) for reflecting laser light is pasted on the surface.
As a result, the wall (W) made of the plastic part 3P and the reflective lid 4P dissipate the heat transferred from the recessed groove 3a of the aluminum block 3A and the heat of the laser light irradiated as reflected light. The temperature is kept so as to be difficult, and the first resin material 1 and the second resin material 2 are entirely surrounded by substantially the same temperature so that the heat generation temperature is averaged as a whole.
(Third Modification of Embodiment 1)
FIG. 7 shows a third modification of the laser welding apparatus according to the first embodiment of the present invention used when the first resin material 1 and the second resin material 2 have a long tubular shape in the longitudinal direction. In FIG. 7, the first resin material 1 and the second resin material 2 are placed on the concave groove 3 a of the reflection jig 3 whose length in the longitudinal direction is increased. Then, the laser beam irradiation means 5 is placed on the reflection lid 4 so that the reflection lid 4 can be moved in the direction indicated by the white arrow (M) in the center of FIG. When the reflecting lid 4 is moved in the direction indicated by the white arrow (M) in the center of FIG. 7, the laser light 6 is moved along the length of the first resin material 1 and the second resin material 2 in accordance with the movement of the reflecting lid 4. Irradiate by moving sequentially in the long direction. Since the laser beam 6 repeats reflection within a certain range under the reflecting lid 4, the laser beam 6 generates heat sequentially in the range irradiated with the laser beam 6 of the first resin material 1 and the second resin material 2, and continuously. Laser welded.
(Fourth Modification of Embodiment 1)
In FIG. 8, the 4th modification of the laser welding apparatus of Embodiment 1 of this invention was shown. FIG. 8 is a plan view of the case where the first resin material 1 and the second resin material 2 are laser-welded in a shape bent in the longitudinal direction, and a reflecting jig 3 having a shape bent in the longitudinal direction; A first resin material 1 and a second resin material 2 which are placed in the concave groove 3a of the reflecting jig 3 and bent in the longitudinal direction are shown. On the reflection jig 3, the first resin material 1 and the second resin material 2, there is a quadrangular reflection lid 4, and the laser beam irradiation means 5 is integrally attached to the reflection lid 4. As indicated by the white arrows (M1 to M2), it is shown that the robot moves in order from the upper left (arrow M1), up (arrow M2), and then to the upper right (arrow M3).
When the reflecting lid 4 is moved in the direction of the white arrow in FIG. 8, the laser light 6 (not shown in FIG. 8) is sent to the first resin material 1 and the second resin material according to the movement of the reflecting lid 4. The long range of 2 in the longitudinal direction is sequentially moved and irradiated. Since the laser beam 6 is repeatedly reflected within a certain range under the reflecting lid 4, the laser irradiated range of the first resin material 1 and the second resin material 2 sequentially generates heat, and the first resin material 1. The second resin material 2 is continuously laser welded while being bent in the longitudinal direction.
In this way, the problem of enabling the supply of a laser welding apparatus capable of continuously welding a long light transmitting resin material is solved.
(Fifth Modification of Embodiment 1)
9A and 9B show a fifth modification of Embodiment 1 of the present invention. 9A and 9B, the shape of the concave groove 3a which is the reflection surface of the reflection jig 3 is changed. 9A and 9B, the lower outer peripheral surface of the first resin material 1, that is, the bottom surface of the concave groove 3a having an arcuate cross section is in contact with the slopes 3b and 3c of the wall (W). Note that the surfaces of the concave groove 3a and the inclined surfaces 3b and 3c of the reflecting jig 3 are mirror-polished finished surfaces, that is, mirror-reflecting surfaces to which no mirror tape is attached.
In Japanese Patent Application Laid-Open No. 2013-202876 according to the applicant's invention described above as the prior art, when a reflecting jig in which the inclined surfaces 3b and 3c are in contact with the lower outer peripheral surface of the first resin material 1, 2 is used. In the present invention, the reflecting lid 4 is mounted on the reflecting jig 3, and the laser beam is transmitted from the laser beam transmitting hole to the laser beam. One laser beam irradiating means 5 for outputting light is placed, and the laser beam from the laser beam transmitting hole is repeatedly reflected by the reflecting jig 3 and the reflecting lid 4, and the laser beam 6 is reflected by the first resin material 1 and the second resin material 1. By repeatedly penetrating the resin material 2 and generating heat, laser welding can be performed by one laser beam irradiation means 5.
(Embodiment 2)
A second embodiment of the present invention will be described. Embodiment 2 of the present invention is a laser welding apparatus in which temperature control means and cooling means for the reflection jig 3 and the reflection lid 4 are added to Embodiment 1 of the present invention.
In the present specification, portions corresponding to the respective portions of the first embodiment and performing the same functions are denoted by the same reference numerals and description thereof is omitted. For example, what is equivalent to the tubular first resin material 1 and fulfills the function of the first resin material 1 is indicated as “first resin material 1” even if it has a flat plate shape. Hereinafter, Embodiment 2 will be described with reference to the drawings.

FIG. 10 shows a schematic configuration of the laser welding apparatus according to the second embodiment of the present invention. The first resin material 1 and the second resin material 2 are placed in the recess groove 3 a of the reflection jig 3, and the pair of inclined surfaces 3 b and 3 c of the reflection jig 3 are arranged on the outer peripheral surface below the first resin material 1. A reflective lid 4 is placed on the reflective jig 3 with the reflective surface 4a facing down. The reflecting surface 4a is made of a curved surface such as a spherical surface or a cylindrical surface connecting the upper end edges of the inclined surfaces 3b and 3c of the reflecting jig 3 in an arch shape.
A laser beam irradiation means 5 is placed on the upper center of the reflection lid 4. A laser beam passage hole 4b is opened at the place where the laser beam irradiation means 5 of the reflecting lid 4 is placed. The laser beam 6 generated by the laser beam irradiation means 5 is irradiated to the first resin material 1 and the second resin material 2 placed in the concave groove 3a of the reflection jig 3 from the laser beam passage hole 4b. The
In Embodiment 2 of the present invention, a temperature sensor (thermocouple) 7 indicated by black dots in FIG. 10 is embedded in the reflecting jig 3, and a temperature sensor (thermocouple) 8 is embedded in the reflecting lid 4. . The temperature sensors 7 and 8 are connected to the temperature control means 9. The temperature control means 9 performs on / off control or feedback control on the output of the laser light irradiation means 5 based on the measurement result temperatures of the temperature sensors 7 and 8 to keep the temperature of the reflecting jig 3 and the reflecting lid 4 within a certain range. ing.
In FIG. 10, since the temperature sensors 7 and 8 do not directly measure the temperatures of the first resin material 1 and the second resin material 2, the temperature changes of the first resin material 1 and the second resin material 2. To control the output of the laser beam. The first resin material 1 and the second resin material 2 that are transparent to laser light are set to target temperatures according to the material and size that are actually used. Instead of the thermocouple temperature sensors 7 and 8, the surface temperature of the first resin material 1 may be directly measured by a non-contact temperature sensor that detects the temperature from infrared information. In addition, the structure of the laser welding apparatus using a non-contact temperature sensor is later mentioned using FIG.
In the laser welding apparatus according to the second embodiment of the present invention, the temperature of the reflecting jig 3 and the reflecting lid 4 is controlled within a predetermined temperature range to improve the uniformity of the laser welding quality. The problem of enabling supply of a laser welding apparatus is solved.
In FIG. 10, cooling cavities 3 e and 3 f are opened in the reflecting jig 3, and cooling nozzles 10 and 11 for blowing a coolant such as air at room temperature or lower are attached. The cooling cavities 3e and 3f communicate with the outside of the reflecting jig 3, and the coolant sprayed from the cooling nozzles 10 and 11 takes the heat of the reflecting jig 3 together with the heat of the reflecting jig 3. Released to the outside. In addition, a cooling nozzle 12 that blows a coolant such as air at room temperature or lower toward the space 3 d below the reflective lid 4 is attached to the reflective lid 4. The space 3d communicates with the outside of the reflecting lid 4, and the coolant sprayed from the cooling nozzle 12 takes the heat of the space 3d and is released to the outside of the reflecting lid 4 together with the heat.
The cooling nozzles 10, 11, and 12 are supplied with a coolant such as air at room temperature or lower from the cooling means 13. The cooling means 13 is connected to the temperature control means 9. The temperature control unit 9 controls the cooling unit 13 based on the measurement result temperatures of the temperature sensors (thermocouples) 7 and 8 to control the supply temperature and supply amount of the coolant from the cooling nozzles 10, 11, and 12. The temperature of the reflecting jig 3 and the reflecting lid 4 is cooled within a predetermined temperature range.
As described above, the second embodiment of the present invention is a laser welding apparatus in which the temperature control means 9 and the cooling means 13 for the reflecting jig 3 and the reflecting lid 4 are added to the first embodiment of the present invention. Solving the problem of supplying a laser welding apparatus that improves the uniformity of laser welding quality by controlling the temperature of the reflecting jig 3 and the reflecting lid 4 within a predetermined temperature range. Yes.
In the configuration in which the cooling nozzles 10, 11 and 12 and the cooling means 13 are further added, after the laser welding is finished, the reflecting jig 3 and the reflecting lid 4 are cooled by the cooling means 13 to shorten the temperature cycle of the laser welding work. This solves the problem of improving the productivity of laser welding.
In FIG. 10, it has been described that the temperature sensors 7 and 8 are embedded in the reflecting jig 3 and the reflecting lid 4, respectively, and the temperature is controlled by detecting both temperatures. Also good. Also, the cooling nozzles 10, 11, and 12 may be configured to use any one cooling nozzle.
(Embodiment 3)
Embodiment 3 of the present invention will be described. Embodiment 3 of the present invention is a laser welding apparatus for laser welding a flat second resin material in the same manner as a flat first resin material that transmits laser light. Hereinafter, it demonstrates with drawing. In the drawings, like the first resin material and the second resin material, even if the shape is slightly different from the embodiment described so far, the same reference numerals are given to the components that perform the same function, and the description is omitted.
FIG. 11 shows a schematic configuration of a laser welding apparatus according to Embodiment 3 of the present invention. The flat plate-like first resin material 1 and second resin material 2 are placed in the recess groove 3a of the reflection jig 3 in a state where they are in contact with each other, and a pair of wall portions (W) of the reflection jig 3 are placed. The slopes 3b and 3c are provided so as to open upward from the outer peripheral surface of the first resin material 1, and a reflective lid 4 is mounted on the reflective jig 3 with the reflective surface 4a facing down. Is placed. The reflecting surface 4a is made of a curved surface such as a spherical surface or a cylindrical surface connecting the upper end edges of the inclined surfaces 3b and 3c of the wall portion (W) of the reflecting jig 3.
A laser beam irradiation means 5 is placed on the upper center of the reflection lid 4. A laser beam passage hole 4b is opened at the place where the laser beam irradiation means 5 of the reflecting lid 4 is placed. The laser light 6 generated by the laser light irradiation means 5 is applied to the first resin material 1 and the second resin material 2 placed in the concave groove 3 a of the reflection jig 3.
Up to this point, the configuration is basically the same as that of the first embodiment of the present invention, but is characterized in that the first resin material and the second resin material to be laser-welded are flat. That is, the recessed groove 3a of the reflecting jig 3 has a recessed groove shape corresponding to the bottom surface 1a and the side surface 1b of the first resin material 1 having a rectangular cross section.
The first resin material 1 and the second resin material 2 generate heat by absorbing the laser light at a rate corresponding to the absorption rate of the laser light. Further, if the surface roughness of the contact surfaces of the first resin material 1 and the second resin material 2 is rough, the laser light is reflected by a slight gap between the contact surfaces and generates heat. Then, the first resin material 1 and the second resin material 2 are melted at the contact surfaces, and thereafter, irradiation with the laser light is finished, solidified, and welded.
By making the shape of the concave groove of the reflection jig the same as the shape of the outer periphery of the flat plate-like first resin material, laser welding of the flat plate-like first resin material that transmits laser light and the second resin material I can do it.
Note that, when the laser beam 6 is irradiated in a state where a pressure is applied to the contact surfaces of the flat first resin material 1 and the second resin material 2, the two are surely welded. Therefore, a pressure is applied to the contact surface of the flat plate-like second resin material 2 in the same manner as the flat plate-like first resin material 1. That is, the pressure applied between the reflecting jig 3 and the reflecting lid 4 is made of a material that transmits laser light more than both the first resin material 1 and the second resin material 2, for example, a bent glass plate. The member 50 is sandwiched and the pressurizing member 50 presses the first resin material 1 and the second resin material 2 against the concave groove 3a of the reflecting jig 3 to apply pressure.
(First and second modifications of Embodiment 3)
12 and 13 show first and second modifications of the third embodiment of the present invention. In FIG. 12, slopes 3 b and 3 c of the wall (W) are provided so as to open upward from both end edges of the bottom surface of the first resin material 1. In FIG. 13, slopes 3 b and 3 c of the wall (W) are provided so as to open upward from both end edges of the upper surface of the second resin material 2. In the first and second modifications, the slopes 3b and 3c of the wall (W) are formed according to the material and size of the first resin material 1 and the second resin material 2 and the output of the laser beam output means. Laser welding quality such as laser welding strength can be ensured by selecting either the position shown in FIG. 12 or FIG. 12 and 13, a mirror tape (T2) is applied to the surface of the pressurizing member 50, and laser light is applied to the surface of the pressurizing member 50 on the slopes 3b and 3c of the wall portion (W) of the reflecting jig 3. 6 is reflected.
(Third Modification of Embodiment 3)
FIG. 14 shows a third modification of the third embodiment of the present invention. The balloon catheter or catheter tube that is the first resin material or the second resin material is made of a thermoplastic polymer material that is opaque to red light and near infrared light, that is, absorbs red light and near infrared light. In FIG. 14, the pressurizing member 51 that applies pressure to the first resin material and the second resin material is made of a material that transmits near-infrared laser light and absorbs far-infrared laser light, such as silicon ( A silicon rubber rubber is used which is made opaque by absorbing far-infrared laser light, and a thick quadrilateral plate-shaped pressurizing member 51A is surrounded by an aluminum frame 51B. Supporting structure. This is because it is easier to make the plate-shaped pressurizing member 51A and the frame 51B as separate parts, and strength can be obtained.
In FIG. 14, the first laser light irradiation means 5 </ b> A that outputs near-infrared laser light and the second laser light irradiation means 5 </ b> B that outputs far-infrared laser light are mounted on the reflection lid 4.
5 A of 1st laser beam irradiation means is a semiconductor laser, for example, The wavelength of the said laser beam is the range of 700 nm-1200 nm, Preferably it is 800 nm-1000 nm. The second laser light irradiation means 5B is, for example, a CO2 laser and irradiates far-infrared laser light. The wavelength of the laser beam is 10640 nm, for example.
The first laser beam irradiation means 5A outputs a near infrared laser beam Ra, irradiates the pressurizing member 51A, the second resin material 2, and the first resin material 1, and reflects the near infrared laser beam Ra to the reflection jig. The first resin material 1, the second resin material 2, and the pressurizing member 51 </ b> A are irradiated again and reflected by the reflection surface 4 a of the reflective lid, and the first resin material 1 is reflected again. 1 and the 2nd resin material 2 are heated, and both are welded.
On the other hand, the second laser beam irradiation means 5B outputs a far-infrared laser to irradiate the pressurizing member 51 to generate heat. When the pressurizing member 51 is heated, the upper outer peripheral surface of the second resin member 2 is warmed by the heat of the pressurizing member 51. Therefore, the first and second resin members are surrounded by the recessed groove 3a, the wall (W), and the pressurizing member 51 of the reflecting jig 3 and the laser light is emitted from the first and second resin members. Repeated irradiation generates heat and welds. The laser beam irradiation means 5B that outputs a far-infrared laser is used as needed.
(Embodiment 4)
In the fourth embodiment of the present invention, an example is shown in which the curved surface serving as the reflecting surface of the reflecting lid 14 is formed by the cylindrical surface 14e and a pair of inclined surfaces 14f and 14f in the longitudinal direction. As shown in FIG. 15, the reflection lid 14 is placed on the reflection jig 3. The reflection lid 14 is formed by a cylindrical surface 14e and a pair of inclined surfaces 14f and 14f in the longitudinal direction. A laser beam passage hole 14 b is formed on the upper surface of the reflection lid 14. Isolation walls 14 c and 14 d are provided at both ends in the longitudinal direction of the lower surface of the reflection lid 14 so as to fill a gap around the upper surface of the first resin material 1.
In the laser beam irradiating means 5, the light beam of the laser beam 6 is stopped by a built-in aperture lens (optical lens) 5 a, and the first resin material 1 is formed from a laser beam passage hole 14 b in which the thin laser beam 6 is opened on the upper surface of the reflecting lid 14. And the second resin material 2 is irradiated so as to spread again. When the laser beam 6 passes through the laser beam passage hole 14 b formed in the upper surface of the reflection lid 14, it spreads on the upper surface of the first resin material 1 and penetrates the first resin material 1 and the second resin material 2. The light is reflected by the reflecting surface of the concave groove 3a of the reflecting jig 3. The laser beam 6 reflected by the concave groove 3a again passes through the first resin material 1 and the second resin material 2, is reflected by the reflecting surface 14a of the reflecting lid 14, and is reflected by the first resin material 1 and the second resin material 2. The resin material 2 is repeatedly irradiated.
FIG. 16 is a cross-sectional view taken along the longitudinal direction of the first resin material 1 of the laser welding apparatus according to Embodiment 4 of the present invention. Separation walls 14c and 14d are provided at both ends of the reflection lid 14 in the longitudinal direction. The isolation walls 14 c and 14 d have a shape extending from the lower surface of the reflecting lid 14 to the outer peripheral surface of the upper half of the first resin material 1. A pair of inclined surfaces 14f and 14f extend obliquely upward from the upper ends of the isolation walls 14c and 14d, and the central portion of the reflecting lid 14 is a cylindrical surface 14e along the longitudinal direction.
The inner surfaces of the isolation walls 14c and 14d, the pair of inclined surfaces 14f and 14f, and the cylindrical surface 14e are mirror surfaces, and heat and laser light do not escape from the space 3d facing the outer peripheral surface of the upper half of the first resin material 1. I am doing so.
Although omitted from FIG. 15, in FIG. 16, the laser beam guiding portion is provided above the reflecting lid so that the laser beam 6 does not leak from between the laser beam irradiation means 5 and the laser beam passage hole 14b of the reflecting lid. 14 g was formed.
In FIG. 16, the laser light transmitted through the first resin material 1 and the second resin material 2 out of the laser light 6 generated by the laser light irradiation means 5 is reflected on the reflection surface of the concave groove 3 a of the reflection jig 3. The trajectory when reflected toward the outside with respect to the center of the laser light irradiation range is shown. When the laser light transmitted through the first resin material 1 and the second resin material 2 is reflected by the concave groove 3a of the reflecting jig 3 and goes outward with respect to the center of the irradiation range, After passing through the resin material 1 and the second resin material 2, the reflection lid 14 moves toward the center of the irradiation range. As described above, when the isolation walls 14c and 14d, the pair of inclined surfaces 14f and 14f, and the cylindrical surface 14e are formed on the reflection lid 14, the first resin material 1 and the second resin material 2 are long. Even if it is long in the direction, the laser beam irradiation is directed toward the center of the laser beam irradiation range under the reflecting lid 14.
However, compared with FIG. 3 in which the reflection surface 4a of the reflection lid 4 of Embodiment 1 of the present invention is a spherical surface, the laser light 6 is concentrated on specific portions of the first resin material 1 and the second resin material 2. Instead, the reflection is repeated within a certain length in the longitudinal direction. Within a certain range in the longitudinal direction, the temperature of the first resin material 1 and the second resin material 2 is heated within the certain temperature range. Therefore, the reflecting surface of the reflecting lid 14 can be welded in a wide range in the longitudinal direction by combining the inclined surfaces 14f and 14f at both ends and the central cylindrical surface.
(Modification of Embodiment 4)
In FIG. 17, the laser welding apparatus of the modification of Embodiment 4 was shown. This is a laser welding apparatus in which the reflection lid 14 is self-propelled along the reflection jig 3 on the reflection jig 3. A pair of traveling wheels 19 sandwiching the side surface of the reflecting jig 3 and a driving wheel 18 driven by a driving motor 17 are attached to the reflecting lid 14 like a self-propelled monorail.
Since the driving wheel 18 driven by the pair of traveling wheels 19 and the driving motor 17 sandwiches the side surface of the reflecting jig 3, the driving motor 17 advances in one direction along the reflecting jig 3 when the driving motor 17 is rotated in one direction. Rotate in the opposite direction and go in the opposite direction. Therefore, by proceeding in combination with forward rotation and reversal, for example, it is possible to advance forward and backward little by little, for example, 2 mm forward and 1 mm backward, 2 mm forward and 1 mm backward again. If the advancement and retreat are repeated and the advancement is made little by little, the first resin material 1 and the second resin material 2 are moved while maintaining a constant temperature in a long range in the longitudinal direction, and are continuously uniform in the longitudinal direction. Can be laser welded.
(Embodiment 5)
A fifth embodiment of the present invention is shown in FIG. The laser welding apparatus according to the fifth embodiment of the present invention is a laser welding apparatus in which temperature control and drive control of the drive motor 17 are further added to the configuration of the fourth embodiment of the invention. In FIG. 18, the temperature of the reflection jig 3 and the reflection lid 14 is detected by using the contact temperature sensors 27 and 28, and the temperature of the reflection jig 3 and the reflection lid 14 is detected, and the reflection lid 14 is attached to the reflection jig 3. It can be moved in the longitudinal direction.
In FIG. 18, the contact-type temperature sensor 28 is used to detect the temperature of the reflective lid 14. However, the temperature detection of the reflective lid 14 may be a type in which a thermocouple is embedded.
The temperature data detected by the temperature sensors 27 and 28 is transmitted to the temperature control means 20a. The temperature control unit 20 a controls the drive control unit 20 b of the drive motor 17 to move the drive motor 17 and move the reflection lid 14 in the longitudinal direction along the side surface of the reflection jig 3. The laser beam irradiation means 5 attached to the reflection lid 14 also moves in the longitudinal direction along the side surface of the reflection jig 3 simultaneously with the reflection lid 14.
In FIG. 19, the operation | movement procedure of the laser welding apparatus of Embodiment 5 of this invention was shown as a flowchart. As the operation procedure of FIG. 19, the laser welding apparatus according to the fifth embodiment of the present invention starts (1) laser light irradiation and traveling at the laser light output level and traveling speed set as initial values. (2) First predetermined distance (L ₁ ) Until the initial value setting laser beam irradiation and forward running. Next, (3) traveling backward by a predetermined distance. Repeat (4), (2) forward travel and (3) reverse travel. Second predetermined distance (L ₂ ), The laser light output level and the traveling speed are changed, and laser light irradiation and traveling are performed. The operations (5) and (2) are repeated for forward travel and (3) for reverse travel, and (4) the operation for changing the laser light output level and the traveling speed is repeated. Third predetermined distance (L ₃ ), The laser beam irradiation and running are stopped. However, when the temperature of the reflecting jig and the reflecting lid enters the abnormal temperature range, the laser light output level and the traveling speed are changed to return the abnormal temperature range to the normal temperature range.
The operation procedure of FIG. 19 will be described in detail in the order of each step as follows. That is, in FIG. 19, first, when the operator uses the laser welding apparatus to set the initial values of the laser light output level and the traveling speed (step ST1), the laser welding apparatus starts the laser light output and traveling (step ST2). . After a predetermined time has elapsed, the first predetermined distance (L ₁ ) It is confirmed whether or not it has moved (step ST3). If “No”, the laser beam output and running are continued, and if “Yes”, “predetermined distance × 1 / n (n is an arbitrary integer)” is moved backward (step ST4). Then, it is confirmed whether or not the temperature of the reflecting jig 3 and the reflecting lid 14 is within a predetermined range (step ST5). If “No”, it is determined whether or not the temperature of the reflecting jig 3 and the reflecting lid 14 is in an abnormal temperature range (step ST10). If “Yes”, the second predetermined distance (L ₂ ) It is confirmed whether or not it has moved (step ST6). “No”, that is, the second predetermined distance (L ₂ ) Is not moved, the process returns to step ST3, and steps ST4 (retreat), ST5 (temperature confirmation), and ST6 (movement distance confirmation) are repeated. In step ST6, “Yes”, that is, the second predetermined distance (L ₂ ) Is moved, the laser beam output level, traveling speed, and n are changed (step ST7). Then, the laser beam output and running are continued, and after a predetermined time has elapsed, a third predetermined distance (L ₃ ) It is confirmed whether or not it has moved (step ST8). “No”, that is, the third predetermined distance (L ₃ ) Is not moved, the process returns to step ST3 (movement distance confirmation), and steps ST4 (retraction), ST5 (temperature confirmation), ST6 (movement distance confirmation), ST7 (laser beam output level, traveling speed, n are changed). ) Repeat the procedure. In step ST8, “Yes”, that is, the third predetermined distance (L ₃ ) Is moved, the laser beam output and traveling are stopped (step ST9).
It should be noted that if the determination in step ST5 (temperature check) is “No”, that is, if the temperature of the jig such as the reflective jig 3 or the reflective lid 4 is not within the predetermined range, the temperature of the jig falls within the abnormal temperature range. If the determination result is “Yes”, that is, the abnormal temperature range, the laser light output level, the traveling speed, and n are set so that the abnormal temperature range returns to the normal temperature range. After changing (step ST7), the laser beam output and running are continued. If the determination result in step ST10 is “No”, that is, if it is not in the abnormal temperature range, the laser light output level, the traveling speed, and n are not changed and the laser light output and traveling are continued.
The fifth embodiment is a laser welding apparatus that combines temperature control and drive control of the drive motor 17. As described above, the temperatures of the reflection jig 3 and the reflection lid 14 are measured, and the reflection jig 3 and the reflection lid 14 are measured. The reflecting lid 14 is moved in the longitudinal direction on the reflecting jig 3 in accordance with the temperature of the reflecting jig 3, and the space surrounded by the reflecting jig 3 and the reflecting lid 14 is moved at a predetermined temperature. Thus, the first resin material 1 and the second resin material 2 are continuously and uniformly welded in the longitudinal direction.
The flowchart of FIG. 19 shows the first, second, and third predetermined distances (L ₁ , L ₂ , L ₃ ) Is shown as an example that can be used universally, and any other flow diagram may be used if necessary.
(Embodiment 6)
A sixth embodiment of the present invention is shown in FIG. The laser welding apparatus according to the sixth embodiment of the present invention adds a cooling means 29 to the configuration of the fifth embodiment of the present invention, and combines the temperature control means 20a, the drive control means 20b of the drive motor 17 and the cooling means 29 with laser welding. Device.
On the lower surface of the reflecting jig 3, two cooling grooves 3g and 3h for blowing and cooling a coolant such as air having a temperature below room temperature extend in the longitudinal direction. The tips of the cooling nozzles 10 and 11 are attached to the lower arm portion of the reflecting jig 3 toward the cooling grooves 3g and 3h. The cooling nozzle 12 is also attached to the reflection lid 14. The cooling nozzles 10, 11, and 12 are connected to the cooling means 29, and the cooling means 29 sends a cooling material such as air having a temperature below room temperature to each of the cooling nozzles 10, 11, and 12 to cool the reflecting jig 3. The coolant can be supplied to the grooves 3g and 3h and the space below the reflecting lid 14. Other configurations are the same as those shown in FIG.
In FIG. 21, the operation | movement procedure of the laser welding apparatus of Embodiment 5 of this invention was shown as a flowchart. The operation procedure of FIG. 21 is as follows: (1) Laser light irradiation and running are started at the laser light output level and traveling speed set as initial values. (2) First predetermined distance (L ₁ ) Until the initial value setting laser beam irradiation and running. Next, (3) return by a predetermined distance. (4), (2) and (3) are repeated, and the second predetermined distance (L ₂ ), The laser light output level and the traveling speed are changed, and laser light irradiation and traveling are performed. The operations of (5), (2), (3), and (4) are repeated to obtain a third predetermined distance (L ₃ ), The laser beam irradiation and running are stopped. However, when the temperature of the reflecting jig and the reflecting lid enters the abnormal temperature range, the cooling means 29 is operated, and the cooling nozzle blows out a coolant such as air at room temperature or lower. Then, the laser light output level and the traveling speed are changed to return the abnormal temperature range to the normal temperature range.
The operation procedure of FIG. 21 determines whether or not the temperature of the reflection jig 3 and the reflection lid 14 in step ST10 of the operation procedure of FIG. 19 already described is in an abnormal temperature range (step ST10). When it is determined “Yes”, that is, when the temperature is in the abnormal temperature range, the cooling means 29 is operated, and an operation (step ST11) in which the cooling nozzle blows out a coolant such as air at room temperature or lower is added.
When it is determined that the abnormal temperature range has been reached, the reflecting jig and the reflecting lid are forcibly cooled by the cooling means so as to quickly return to the normal temperature range. As a precaution, the operation procedure of FIG. 21 will be described in detail as follows.
That is, in FIG. 21, first, when the operator uses the laser welding device to set the initial values of the laser light output level and the traveling speed (step ST1), the laser welding device starts running with the laser light output (step ST2). . After a predetermined time has elapsed, the first predetermined distance (L ₁ ) It is confirmed whether or not it has moved (step ST3). If “No”, the laser beam output and running are continued, and if “Yes”, “predetermined distance × 1 / n” is moved backward (step ST4). Then, it is confirmed whether or not the temperature of the jig is within a predetermined range (step ST5). If “No”, it is determined whether or not the temperature of the jig is in an abnormal temperature range (step ST10). If “Yes”, the second predetermined distance (L ₂ ) It is confirmed whether or not it has moved (step ST6). “No”, that is, the second predetermined distance (L ₂ ) Is not moved, the process returns to step ST3, and steps ST4 (retreat), ST5 (temperature confirmation), and ST6 (movement distance confirmation) are repeated. In step ST6, “Yes”, that is, the second predetermined distance (L ₂ ) Is moved, the laser beam output level, traveling speed, and n are changed (step ST7). Then, the laser beam output and running are continued, and after a predetermined time has elapsed, a third predetermined distance (L ₃ ) It is confirmed whether or not it has moved (step ST8). “No”, that is, the third predetermined distance (L ₃ ) Is not moved, the process returns to step ST3, and steps ST4 (retreat), ST5 (temperature confirmation), ST6 (movement distance confirmation), and ST7 (laser light output level, traveling speed, n are changed) are repeated. . In step ST8, “Yes”, that is, the third predetermined distance (L ₃ ) Is moved, the laser beam output and traveling are stopped (step ST9).
If “No” is determined in step ST5, that is, if the temperature of the jig is not within the predetermined range, it is determined whether or not the temperature of the jig is in an abnormal temperature range (step ST10). If the result is “Yes”, that is, an abnormal temperature range, the cooling means is operated so as to return from the abnormal temperature range to the normal temperature range, and the cooling nozzle blows out a coolant such as air at room temperature or lower. (Step ST11). Then, returning to step ST5, the cooling operation of step ST11 is repeated until “Yes” in the determination of step ST5, that is, until the temperature of the jig falls within a predetermined range.
If the determination result of step ST10 is “No”, that is, it is not in the abnormal temperature range, the process proceeds to step 8 as in the flowchart of FIG.
In the flowchart of FIG. 21, one operation procedure of laser welding is shown. However, “setting of laser beam output level and initial value of traveling speed” in step ST1 is set to “temperature of laser reflecting jig 3 and reflecting lid 4”. If “automatically set based on the optimal initial value” is repeated, the same laser welding operation can be repeated by repeating the flowchart of FIG.
Further, after step ST9, if the cooling means is operated and the cooling nozzle blows out a coolant such as air at room temperature or lower, step ST12 of “cooling by the cooling means” is added. The temperature of the reflective lid 4 can be returned to room temperature in a short time.
The flowchart of FIG. 21 shows the first, second and third predetermined distances (L ₁ , L ₂ , L ₃ ) Is shown as an example that can be used universally, and any other flow diagram may be used if necessary.
(Embodiment 7)
Embodiment 7 of the present invention is characterized in that the surface temperature of the first resin material 1 is directly measured by a non-contact temperature sensor that detects the temperature from infrared information or the like. FIG. 22 shows a cross-sectional view of the main part of the laser welding apparatus according to the seventh embodiment of the present invention. In FIG. 22, a non-contact temperature sensor 38 is attached to the reflective lid 14, and the infrared temperature information on the surface of the first resin material 1 is directly read by the non-contact temperature sensor 38 in a non-contact manner.
In the laser welding apparatus of the second embodiment already described with reference to FIG. 10, the temperature is detected by embedding the thermocouples 7 and 8 in the reflecting jig 3 and the reflecting lid 4, respectively. This indirectly measured the temperature of the first resin material 1 and the second resin material 2. In the laser welding apparatus according to the seventh embodiment of the present invention, the non-contact temperature sensor 38 directly reads the infrared temperature information on the surface of the first resin material 1 in a non-contact manner. Therefore, the surface temperature of the first resin material 1 can be controlled quickly and accurately.

In the laser welding apparatus according to the seventh embodiment of the present invention, since the reflecting jig 3 and the reflecting lid 14 which are separate parts which are originally separated are used in an overlapping manner, both are disassembled and the non-contact temperature sensor 38 is disassembled. It is easy to maintain a clean surface. Since other structures are the same as those in the first to seventh embodiments, the description thereof is omitted.
(Embodiment 8)
Embodiment 8 of the present invention is characterized in that the reflecting lid 24 is reduced in size and weight. FIG. 23 is a cross-sectional view of the main part of the laser welding apparatus according to the sixth embodiment of the present invention. In FIG. 23, a thin spherical plate is used as the reflective lid 24. In the first to seventh embodiments, the reflecting lid 4 is shown by cutting an aluminum block into a predetermined shape or connecting a slope and a cylindrical surface. In the eighth embodiment, a thin aluminum flat plate is used. Is used to make a spherical plate by plastic deformation and a reflective lid 24 having a lower surface as a mirror surface. This is because when the first resin material 1 and the second resin material 2 are small in size and can be welded in a short time, the heat capacity of the reflecting lid 24 may be small.
The material of the reflection lid 24 may be a plastic plate instead of a thin aluminum plate, and a mirror surface tape (T) with a laser beam transmitting hole may be attached to the surface of the plastic plate. Since other structures are the same as those in the first to seventh embodiments, the description thereof is omitted.
(Embodiment 9)
In Embodiment 9 of the present invention, as shown in FIG. 24, the reflective lid 44 is made of a resin material that is transparent to laser light, and the reflective surface 44a is formed on the lower surface of the reflective lid 44. In the range through which the laser beam output from the light irradiating means 5 passes, a portion of the laser beam transmitting hole 44H not formed with the reflecting surface 44a is formed. This is because, even if the reflective lid 44 is a laser beam transmitting resin material as a whole and does not have a breathable hole, if there is a portion through which the laser beam passes optically, that portion is optically It functions as a laser beam passage hole. Since there is no air permeable hole in the reflection lid 44, there is an advantage that heat does not escape from the space above the first resin material 1 to the outside. It has been described that the laser beam passage hole may be a hole through which laser beam is optically transmitted.

In the ninth embodiment of the present invention, the first resin material 1 and the second resin material 2 are irradiated with the laser beam 6 by the reflection lid 44 having a laser beam passage hole 44H that optically transmits the laser beam. This is a laser welding apparatus. Laser light is irradiated on the reflective lid 44 without making a breathable laser light passage hole, and heat does not escape from the space above the first resin material 1 to the outside. The second resin material 2 can be welded.
(Embodiment 10)
In the tenth embodiment of the present invention, as shown in FIG. 25, the laser light irradiation means 5 is attached to the reflecting jig 3, and the laser light 6 is sent to the first resin material by the reflecting lid 34 having no air-permeable holes. 1 is a laser welding apparatus that irradiates the first and second resin materials 2. The first resin material 1 is a so-called reflection furnace type laser welding apparatus that irradiates laser light from a laser light passage hole 3 h provided in the reflection jig 3 without opening a laser light passage hole in the reflection lid 34. And the second resin material 2 can be welded.

  In the description of the first embodiment to the tenth embodiment, the example in which the first resin material 1 and the second resin material 2 are tubular resin materials or plate-shaped resin materials has been described. Laser welding of the first resin material 1 and the second resin material 2 having a short cylindrical shape, or the first resin material 1 having a cylindrical or tubular shape and the second resin material having a solid rod shape 2 and laser welding of the block-shaped first resin material 1 and the second resin material 2 can be applied.

The present invention provides a hollow first resin material such as a cylinder or a tube, and a hollow second resin material such as a tube or a tube inserted into the first resin material or a solid second such as a rod. In addition to the laser welding for welding the resin material, it can also be applied to the laser welding of the block-shaped first resin material 1 and the second resin material 2.
In addition to laser welding of medical resin materials such as nasal cannulas and catheters, various light-transmitting resin materials can be welded by irradiating with laser light.

DESCRIPTION OF SYMBOLS 1 1st resin material 2 1st resin material 3 Reflective jig 3a Recessed groove 3b, 3c Slope of wall part 4 Reflective lid 4a Reflective surface of reflective lid 4b Laser beam irradiation hole 5 Laser beam irradiation means 6 Laser beam 7 Reflection Jig temperature sensor 8 Reflector lid temperature sensor 9 Temperature control means 10, 11 Reflector jig coolant delivery nozzle 12 Reflector lid coolant delivery nozzle 13 Cooling means T Mirror surface W Wall

Claims (16)

A laser device that abuts a light-transmissive first resin material and a second resin material, and laser welds the first and second resin materials,
Laser light irradiation means;
The first resin material has a cross-sectional shape corresponding to the outer peripheral shape of the first resin material, the surface forms a reflective surface that reflects laser light, and the second resin material is in contact with the first resin material. A reflective jig having a concave groove that can be received by the light source, and a wall portion that is on both sides above the concave groove, and whose surface forms a reflective surface that reflects the laser beam,
When mounted on and mounted on the wall portion, a concave groove of the reflection jig, a reflection surface facing the wall portion, and a laser beam passage hole through which the laser beam generated by the laser beam irradiation means passes. Having a reflective lid,
The laser beam generated by the laser beam irradiating means is placed in the recess groove by contacting the second resin material from the laser beam passage hole of the reflection lid attached on the wall portion. Irradiated towards the resin material,
While the laser light that has passed through the first resin material and the second resin material is repeatedly reflected on the concave grooves, the walls, and the reflective surfaces of the reflective lid, the first resin material and the second resin A laser welding apparatus configured to heat and weld a material. A laser device that abuts a light-transmissive first resin material and a second resin material, and laser welds the first and second resin materials,
Laser light irradiation means;
The first resin material has a cross-sectional shape corresponding to the outer peripheral shape of the first resin material, the surface forms a reflective surface that reflects laser light, and the second resin material is in contact with the first resin material. A recessed groove that can be received in this way, a wall portion on both sides above the recessed groove, the surface of which forms a reflecting surface that reflects the laser light, and a laser beam passage hole through which the laser beam generated by the laser beam irradiation means passes. And a reflection jig having
When mounted on and mounted on the wall portion, having a reflecting lid having a concave groove and a reflecting surface facing the wall portion of the reflecting jig,
The laser beam generated by the laser beam irradiating means is irradiated on the reflecting surface of the reflecting lid from the laser beam passage hole of the reflecting jig, reflected by the reflecting surface, and brought into contact with the second resin material. Irradiated toward the first resin material placed in the recess groove,
While the laser light that has passed through the first resin material and the second resin material is repeatedly reflected on the concave grooves, the walls, and the reflective surfaces of the reflective lid, the first resin material and the second resin A laser welding apparatus configured to heat and weld a material.   Pressure applied between the reflective jig and the reflective lid, and pressurizing the first resin material and the second resin material placed in the concave groove of the reflective jig into the concave groove of the reflective jig The laser welding apparatus according to claim 1 or 2, wherein a member is provided. Further, the pressurizing member made of a material that absorbs a far-infrared laser;
As the laser light irradiation means, a first laser light irradiation means that outputs a near infrared laser beam and a second laser light irradiation means that outputs a far infrared laser light,
The first laser beam irradiation means outputs a near infrared laser beam, irradiates the pressurizing member, the second resin material, and the first resin material, and reflects the near infrared laser beam by the concave groove of the reflection jig. Again, the first resin material, the second resin material, and the pressurizing member are irradiated and reflected by the reflecting surface of the reflecting lid, and the first resin material and the second resin material are heated, And the second laser beam irradiation means outputs a far-infrared laser, irradiates the pressurizing member, heats the pressurizing member, and heats the pressurizing member to the first resin. The laser welding apparatus according to claim 3, wherein the material and the second resin material are heated. On the walls provided on both sides above the concave groove of the reflecting jig, a slope opening to the reflecting lid is formed, and the laser beam is reflected by the reflecting surface of the slope and the reflecting surface of the reflecting lid. The laser welding apparatus according to claim 1, wherein the laser welding apparatus is used. The laser welding apparatus according to claim 1, wherein the reflecting surface of the reflecting lid is a spherical surface. The laser welding apparatus as described in any one of Claim 1 to 4 which made the reflective surface of the said reflective cover the cylindrical surface. The laser welding apparatus according to claim 7, wherein reflection portions are provided at both ends in a longitudinal direction of a cylindrical surface of the reflection surface which is a cylindrical surface of the reflection lid. The laser welding apparatus according to claim 1, wherein a reflective lid is relatively movable with respect to the reflective jig. 5. The laser welding apparatus according to claim 1, wherein the laser beam is moved while reciprocating relative to the reflecting jig. A temperature sensor is provided in the reflecting jig or the reflecting lid, and a laser light output level or a moving speed of the reflecting lid is controlled by a temperature detected from the reflecting jig or the reflecting lid. Item 11. The laser welding apparatus according to any one of Items 1 to 10. Furthermore, at least one of the reflecting jig and the reflecting lid is provided with a cooling means, and the cooling means is controlled by the temperature detected from the reflecting jig or the reflecting lid, so that at least the reflecting jig and the reflecting lid are The laser welding apparatus according to claim 11, wherein one side is cooled. The laser light irradiation means has an optical lens that narrows the light flux of the laser light, and directs the light flux of the laser light once narrowed by the lens from the laser light passage hole to the first resin material and the second resin material. The laser welding apparatus according to any one of claims 1 to 4, wherein irradiation is performed so as to spread again. The second resin material is brought into contact with the light-transmissive first resin material,
The first resin material has a cross-sectional shape corresponding to the outer peripheral shape of the first resin material, the surface forms a reflective surface that reflects laser light, and the second resin material is in contact with the first resin material. And a concave jig that is receptive to each other, and a wall having a slope that opens from the concave groove and has a reflective surface that reflects the laser beam on both sides of the concave groove. And fitting the first resin material in contact with the second resin material so as to contact the reflective surface of the concave groove,
When mounted on and mounted on the wall portion, a concave groove of the reflection jig, a reflection surface facing the wall portion, and a laser beam passage hole through which the laser beam generated by the laser beam irradiation means passes. Mount the reflective lid on the wall, and attach it.
Attach a laser beam irradiation means at a position where the laser beam passes through the laser beam passage hole of the reflection lid mounted on the wall,
A laser beam is irradiated toward the concave portion by a laser beam irradiation means, and the laser beam that has passed through the first resin material or the first resin material and the second resin material is reflected by the reflection surface, and The laser light that has passed through the first resin material and the second resin material is repeatedly reflected on the concave grooves, the walls, and the reflective surfaces of the reflecting lids, while the first resin material and the second resin material are reflected. A laser welding method characterized by heating and welding a resin material. The second resin material is brought into contact with the light-transmissive first resin material,
The first resin material has a cross-sectional shape corresponding to the outer peripheral shape of the first resin material, the surface forms a reflective surface that reflects laser light, and the second resin material is in contact with the first resin material. The second resin material is brought into contact with a reflection jig having a recess groove that can be received in this manner, and a wall portion that is on both sides above the recess groove and whose surface forms a reflection surface that reflects the laser beam. Fitting the first resin material so that it comes into contact with the reflective surface of the concave groove,
A pressurizing member that pressurizes the first resin material and the second resin material placed in the concave groove of the reflective jig into the concave groove of the reflective jig is attached to the reflective jig.
When mounted on and mounted on the wall portion, a concave groove of the reflection jig, a reflection surface facing the wall portion, and a laser beam passage hole through which the laser beam generated by the laser beam irradiation means passes. Mount the reflective lid on the wall, and attach it.
A laser beam irradiation means is attached to a position where the laser beam passes through a laser beam passage hole of the reflection lid mounted on the wall,
A laser beam is irradiated toward the concave portion by a laser beam irradiation means, and the laser beam that has passed through the first resin material or the first resin material and the second resin material is reflected by the reflection surface, and The laser light that has passed through the first resin material and the second resin material is repeatedly reflected on the concave grooves, the walls, and the reflective surfaces of the reflecting lids, while the first resin material and the second resin material are reflected. A laser welding method characterized by heating and welding a resin material. The second resin material is brought into contact with the light-transmissive first resin material,
The first resin material has a cross-sectional shape corresponding to the outer peripheral shape of the first resin material, the surface forms a reflective surface that reflects laser light, and the second resin material is in contact with the first resin material. The second resin material is brought into contact with a reflection jig having a recess groove that can be received in this manner, and a wall portion that is on both sides above the recess groove and whose surface forms a reflection surface that reflects the laser beam. Fitting the first resin material so that it comes into contact with the reflective surface of the concave groove,
A pressurizing member made of a material that absorbs a far-infrared laser that pressurizes the first resin material and the second resin material placed in the concave groove of the reflective jig into the concave groove of the reflective jig; Attach to the reflection jig,
When mounted on and mounted on the wall portion, a concave groove of the reflection jig, a reflection surface facing the wall portion, and a laser beam passage hole through which the laser beam generated by the laser beam irradiation means passes. Mount the reflective lid on the wall, and attach it.
A first laser beam irradiating means for outputting a near-infrared laser beam to a position where a laser beam of a laser beam passage hole of a reflecting lid attached on the wall passes; and a second laser beam for outputting a far-infrared laser beam Attach the irradiation means,
The near-infrared laser beam is output by the first laser beam irradiating means to irradiate the pressurizing member, the second resin material, and the first resin material, and the near-infrared laser beam is reflected by the concave groove of the reflecting jig. Again, the first resin material, the second resin material, and the pressurizing member are irradiated and reflected by the reflecting surface of the reflecting lid, and the first resin material and the second resin material are heated, And the second laser beam irradiating means outputs a far-infrared laser to irradiate the pressurizing member, heat the pressurizing member, and heat the pressurizing member to the first resin. Laser welding method in which the material and the second resin material are heated.

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