JPS61174280A - Joining of members - Google Patents

Abstract

PURPOSE:To securely join two members with ease without use of any adhesive, by subjecting the surface of one of the two members to be joined to scanning and irradiation with a laser beam to form uneven portions thereon, embedding into the uneven portions the other member. CONSTITUTION:One member 3 (e.g. metal) out of the two members to be joined is placed within laser beam irradiation equipment. The member 3 is irradiated with a laser beam 7 emitted from a laser generator 12 with the relative movement of the member 3 by means of an NC control 10, thereby causing recesses 4 and protrusions 6 having desired shapes and dimensions to be formed on the surface of the member 3. The other member 2 (e.g. nylon and ceramic) is embedded into the member 3 having uneven portions to join them under sufficient pressure. The present process enables a flexible material to be securely joined to a hard material without use of any adhesive.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of forming predetermined irregularities on the surface of one of two members to be bonded to achieve good adhesion with the other member.

[Conventional technology]

Many proposals have been made as methods for bonding two adhesive members together. Typical examples are things like pipes, where a thread is cut on the outside of one end of the first member and a thread is cut inside the i end of the second member to be bonded; A screw cut on the outside of one end of the first member and a screw cut on the outside of one end of the second member are screwed into a thread cut on the inside of a common nipple, and flanges are attached to both ends. It is commonly used to attach the flange, butt the flange surfaces, and tighten the flange with screws, and also to prevent it from loosening.

Other examples include welding or adhesive bonding, and depending on the application, reinforcement is applied to improve adhesive strength.

These are limited to cases where the member to be bonded has appropriate strength and is easy to thread, weld, or bond.

It can be applied to materials that have a certain wall thickness, can be threaded, and can be expected to maintain strength and adhesion after screwing, such as pipes, but it can be applied to materials where one side is metal and the other is flexible, such as plastic. It cannot be applied to materials that are soft and different in nature. In addition, it cannot be applied to members of irregular shapes that are not pipes, or members that are made of shafts or plates. Sealants, sealants, or adhesives may not be available to provide good adhesive bonding. Some of the parts include tableware, pipes, corrosion-resistant parts,
For items that use ceramic material on one side, items that are porous, and items that use wear-resistant material on one or both sides, it may not be easy to provide a part to attach a screw. A necessary sealing method must be created depending on the intended use or use of the adhesive method. These implementations are often difficult in workplaces and service fields where division of labor is advanced.

[Problems to be solved]

Considering the current situation mentioned above, it can be applied universally even to parts where it is difficult to use screws, welding, adhesives, etc.
The two parts to be bonded have high strength at the bonded part and have very good adhesion and maintain good adhesion, but it is a technical problem to provide a method that can be easily obtained. It was hot.

[Failure to solve the problem]

As a way to solve the problems of the conventional technology mentioned above,
The present invention uses a laser to form irregularities on the surface of the bonding part of at least one adhesive member, and embeds and adheres another adhesive member into the uneven surface to form a tight bond. .

[Effect]

Compared to simply creating mechanical irregularities on the surface of the adhesive member, when irradiating with a high-energy beam such as a laser, the amount of energy can be adjusted, and the adjusted amount can be added to reduce the atmospheric pressure. When processing is performed using energy irradiation with simultaneous control, it is possible to process unevenness to the required depth on the surface of the part, and at the same time, the surface is heated and forms a nitrided layer and carbonized layer as a surface reaction layer with the atmosphere. A heat treatment diffusion layer suitable for the material can be formed. Furthermore, in the case where a required surface reaction layer is preliminarily formed without simultaneously controlling the atmosphere, heat treatment and diffusion can be performed to sufficiently bond the base material and the surface by diffusion bonding. Also, laser beam NC
By controlled scanning, it is possible to form irregularities of any shape. The unevenness formed in this way provides a uniform and stable surface, high strength, and improved service life. There is an advantage that the shape and dimensions of the unevenness can be changed by adjusting the amount of energy and the processing speed can be increased to form the desired unevenness.

〔Example〕

An embodiment of the present invention will be explained based on the drawings. Figures 1A, 1B, and 2 are explanatory diagrams of unevenness formation, and Figure 3 is a processing device that uses a laser and an NC control device to move the surface of a member to form unevenness. Explanatory diagram.

As shown in FIG. 3, a laser 7 is used to irradiate the surface of the member 3 to form irregularities. The workpiece 3 is fixed and supported on the upper part of a table 8, and the table 8 moves at a predetermined speed by a predetermined distance in the horizontal and vertical directions via a circuit 11 that connects an NC control device 10 and a motor 9. The surface is processed to form the required unevenness. It has been confirmed that the laser 7 used in this case requires irradiation energy of 105 W/- or more by focusing the beam output by the oscillator 12 with the lens 13. The surface of the member 3 to be machined was made of tool steel SKD material, and was coated with nickel or chromium.

The present invention has a technical idea that can be applied to various materials and shapes, but for convenience, one member 3 with unevenness and the other soft and flexible exterior member 2 are shaped like a pipe. FIG. 1A shows a side sectional view of the body, and FIG. 1B shows a developed plan view of the uneven surface of the member 3. The member 3 is made of SKD material. Other members 2 to be bonded to this member 3 include, for example, fluorides such as Teflon, heat-resistant resins such as polyimide, polyethylene, polydimethylsiloxane, nylon, barium, strontium, zircon, aluminum, etc. oxide is adhered onto the surface of said member 3.

By irradiating the surface of the member 3 with a laser, the diameter of the hole is approximately 0.8 uφ, the depth of the hole is 0.3 mx, and the ejection amount is 0.2 mm.
Holes B were formed with a pitch of approximately 5B.

What is shown in Figure 1A, Figure 1B, and Figure 2 is that the dimensions of hole 4, the shape and size of jets 5 and 6, the distance between holes 4, and the direction connecting the imaginary center lines of hole 4 are not in a straight line. This is an example in which the virtual lines are not arranged in parallel. In general, each hole, the spout of each hole, the interval between each hole, each hole, that is, the vertical imaginary center connection center line of each hole shows a straight line, and each hole center line is parallel to each other. If the lateral virtual central connection center line of each hole is a straight line, the drilling process is easy and the NC control should be as simple as possible if it is sufficiently effective for the purpose. It is selected and used to the extent that the machining speed can be increased.

The above-mentioned hole was set almost constant, the NC control device 10 shown in FIG. 3 was used, YAG was used as the laser oscillator 12, 25 beam Joule, Q switching, pulse width 1 μsec, 45H2 was irradiated, Hole diameter Q, 78
B. When forming a hole with a depth Q of 31 ffJ and a jet of 0.2 u, one member 3 of the bonded body with the unevenness shown in Fig. 1A is coated with 5KD (tool sieve or plus copper alloy). Table 1 shows the results of experiments in which polyfluorinated ethylene such as Teflon or its derivatives were used for the other exterior member 2.

Table 1 Adhesive parts and adhesive strength As shown in Table 1, one member 3 treated with irregularities and the other joining member 2 were bonded by applying pressure so as to be embedded in the irregularities through adhesive heat treatment. . It showed extremely high adhesive strength.

As another application example, it was confirmed that when a compound such as a ceramic or a ceramic compound was used as the member 2, an adhesion having sufficient adhesive strength could be obtained.

〔effect〕

The method of bonding members according to the present invention involves irradiating the surface of a hard member such as a metal with high energy such as a laser beam to form irregularities of the desired shape and size in the required locations and in the required number, and at the same time attaching the parts to the surface of the member. The base material near the uneven portion is heated and modified by heat treatment such as material diffusion, and the surface of the member is coated with polytetrafluoroethylene, polyvinyl fluoride, or boridimethyl sikiloic acid to cover the uneven portion. Polyethylene, nylon, other synthetic resins, sumac, enamels, inorganic compounds consisting of aluminum, zirconium, strontium, barium and other oxides, various ceramics, at least one of these selected according to the purpose, or By bonding a member made of two or more compounds to another member having the required shape and dimensions without using an adhesive, it was possible to obtain a bond with partial heat resistance and extremely high adhesive strength.

Of course, adhesive can also be used.

The technical idea of the above can be applied to pipes, tubes, heat exchangers, ceramic products, food containers, wear-resistant products, etc.

It enables bonding of hard and soft foreign materials, facilitates bonding work, has sufficient strength in the bonded part, and has good durability in use.

[Brief explanation of the drawing]

FIG. 1A, FIG. 1B, and FIG. 2 are all explanatory diagrams of one embodiment of the present invention. Figure 3 shows NC for processing the surface of parts.
It is an explanatory view of a processing device provided with control. 1... Adhesive part 2... Other joining member 3...
・One joining member 4 with an uneven surface...holes, recesses
5... Spout 6... Convex portion 7... Laser beam 8...
・Table 9...Motor 10...NC control device 12...Laser oscillator 13...Lens patent applicant Bengami Japax Laboratory Co., Ltd.
Attorney Patent Attorney Nakanishi - Figure IA Figure 1B Figure 2 Figure 3!21I

Claims (1)

[Scope of Claims] 1. In the method of bonding the joining member to the surface of one member, the surface of the one member is subjected to an unevenness forming treatment by scanning irradiation with a laser beam, and the joining member is attached to the unevenness treated area. A method for adhering parts, which is characterized by embedding and adhering. 2 A laser beam irradiated onto the surface of one member is scanned by relative movement by an NC control device, and the member is irradiated and heated to form holes of a desired shape and size in a desired arrangement. A method for adhering the members according to item 1.