JPS5919085A - Joining method of solid phase - Google Patents

Abstract

PURPOSE:To prevent the deterioration of base metal and to improve joint strength, by restraining a pair of objects to be welded formed with joint surfaces on prescribed surfaces by means of jigs and joining the joint surfaces by low pressurizing force and heating. CONSTITUTION:Joint parts 5a of objects 5 to be joined are formed to the faces inclined at a specified angle from the direction at a right angle to the axial direction of the objects 5 and from the orthogonally intersecting direction. Such joint parts 5a are set between jigs 4 for restraining deformation, and after the entire part of the device is maintained in an inert atmosphere, the jigs 4 are heated to heat the objects 5. The objects 5 are grasped with chucks, and are pressed axially; at the same time, the objects are pressed in the direction at a righ anglue to the axial direction by a pressing means 14. The deterioration of the base metal is prevented and the joint strength is improved by the above- mentioned low pressurizing force and heating.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a solid phase joining method for joining a pair of objects to be joined by mechanical pressure and heating.

[Technical disadvantages of the invention and its problems] Solid phase bonding is known as a means for bonding a pair of objects to be bonded. This solid phase bonding is performed by abutting a pair of objects to be bonded, heating the bonded portion to a bonding temperature, and applying pressure. Such in-phase joining has advantages such as not causing a decrease in mechanical strength due to changes in metal structure unlike joining by welding. Conventionally, when long objects to be welded are welded in phase, the objects to be welded are clamped near their ends with chucks, and liquid is distributed to the objects to be joined in the axial direction via the chuck. I tried to apply force. However, according to this method, by applying pressure to the objects to be bonded, -71
There was a drawback that the part B was not located between the chucks, and was deformed no matter how much. Therefore, the present applicant covered the joint portion of a pair of objects to be welded, which is pressurized in the axial direction through the chuck, with a deformation restraining portion, and provided the deformation restraint portion with a direction perpendicular to the axial direction of the joint portion. An application has already been filed as Utility Model Application No. 56-43644 for an in-phase welding device 4 designed to prevent the deformation of wave-bonded objects by using a presser to apply pressure.

However, in this equipment, a pair of corrugated joints are joined using a ■ type joint or a scarf joint, but the joint performance is not good, so the joining temperature must be raised to obtain the required joint strength. This inevitably causes problems such as softening and embrittlement of the objects to be joined.

C. Purpose of the Invention The present invention has been made in consideration of the above circumstances, and aims to provide a face-to-face welding method capable of joining a pair of objects to be welded at a lower temperature and lower pressure. .

[Summary of the Invention] Solid-state welding is achieved by forming the joint between a pair of objects to be joined into surfaces that are inclined at a certain angle from two directions perpendicular to the axial direction of the objects to be joined and orthogonal to each other. This improves the adhesion properties.

[Embodiments of the Invention] Hereinafter, the present invention will be described in detail based on embodiments with reference to the drawings.

First, to explain the solid phase bonding method used in the implementation of this example, first chucks (2) (!: second A chuck (3) is installed, and between these,
A deformation restraint jig (4) is provided apart from the first and second chucks (2) and (3). 1st above,
Since the second chucks (2) and (3) have the same structure, only one of them will be explained.
), the upper chuck (6) and the lower chuck (7
), these are chuck pressure cylinders (8)
It is designed to be opened and closed by. Furthermore, the above F part chuck ((31, (7)) holds the workpiece (5)
The axial force pressurizes in the IQl+ direction (is connected to the cylinder (9), and by this 1llb direction pressurizing cylinder (9), the workpiece (
5) is pressurized in the axial direction. Also, the second
As shown in the figure and FIG. 3, the deformation restraining jig (4) is divided into two parts, an upper jig (LOA) and an upper jig (101). (5), (
5) comes to encompass the joint (5a).

The upper jig (IOa) is provided with a +t++ cylinder (111a) for pushing down in the direction of the lower jig (Job).

Also, lower + q1 + cure, j1. A through hole (1 hole) is bored in (101), and a lower cylinder (14) is inserted into the four through holes (1 hole).

Next, the solid phase bonding method of this embodiment using two consecutive solid phase bonding methods will be explained.

First, as shown in FIG.
) and (5) are in contact with each other before in-phase joining, with respect to the X direction perpendicular to the axial direction (Z direction in Figure 4) and the Y direction perpendicular to the X direction of and. , the end faces of the objects to be joined are cut so as to be inclined by angles θ1 and θ2, respectively. These angles θ5. Preferably, θ2 is within the range of 70 degrees. However, these objects to be joined (5), (5)
are clamped by the first chuck (2) and the second chuck (3) respectively, and the end surfaces of the objects to be welded (5) and (5) are brought into contact with each other and joined as shown in Fig. 4. With the joint part (5a) formed, the joint part (5a) is connected to the upper jig (10a) and the lower jig (101) of the deformation restraint jig (4).
). Therefore, after the entire apparatus is made empty or in an inert gas atmosphere or a reducing gas atmosphere, the object to be welded (
5), heat (5). Object to be joined (5).

When (5) reaches a certain temperature, the axial pressure cylinders (9) and (91 apply pressure to the objects (5) and (5) in the axial direction, and the deformation restraint jig The lower cylinder (13) of (4) is used to push the push tool, pressurizes the joint (5a) of the objects (5) and (5) in a direction perpendicular to the axial direction and holds it for a certain period of time. Suruyoshi, joint (5a)
The joint (5a) tries to deform in the direction perpendicular to the axial direction due to the pressure applied in the axial direction, but the joint (5a) is contained by the deformation restraint jig (4) and is not pushed. Excessive deformation is suppressed because both are pressed by the deformation restraint jig (4) and the workpiece (5),
Since there is a clearance between the joint part (5a) and the IF during joining, the joint part (5a) is
1,5a), (15h), (16a)(
16b), the surface oxide film at the joint (5a) peels off and falls off, and a new surface is exposed.

As a result, together with the increase in the end face pressure contact force of the joint portion (5a) by the pusher (Ll), high-strength in-phase jointing is achieved. By the way, the object to be joined is copper, and the angle θ1°θ2 is 45
As a matter of fact, when solid phase welding was performed at a welding temperature of 630°, the joint strength was improved compared to when joints were performed using a ■-shaped joint and a scarf joint. This is because in the case of an I-type joint, little sliding occurs at the joint, whereas in the case of a scarf joint, relative heavy sliding at the joint occurs only in one direction. In other words, K, which achieves the same bonding strength as an I-type joint or a scarf joint, means that it can be joined at a lower welding temperature and with a lower pressure than an I-type joint or a scarf joint, It becomes possible to prevent softening or embrittlement of the fractured workpiece. However, after solid phase bonding,
1st. The second chucks (2) and (3) are released, and the upper cylinder (Ill is υ1) of the deformation restraint jig (4) is released.Then, the upper jig (LOA) and the lower jig (LOA) are released. iQh), then open the lower cylinder (13).
When the push tool 04) is pushed upward, the objects to be joined (5) and (5) are deformed and restrained jig (4).
Note that the present invention is not limited to a rectangular moon as an object to be welded, and can also be applied to an object to be welded in which a groove is formed in a rectangular shape or a cylindrical object to be pressed.

[Effects of the Invention] The solid phase welding method of the present invention applies pressure in the axial direction of a pair of objects to be welded, and covers the joint portions of these objects with a deformation restraining jig, so that the “above” When applying pressure in a direction perpendicular to the axial direction, the joining surface is formed on a surface inclined at a certain angle from two directions perpendicular to the axial direction and orthogonal to each other. Relative sliding occurs at the joint during bonding, and the surface oxide film is not fully utilized.
1#, as a result of falling off, a new surface that has not undergone oxidation appears, improving bonding properties. Therefore, compared to solid phase welding using other joint shapes such as I-type joints and scarf joints,
Since bonding can be performed with lower pressure and lower bonding temperature, there is no deterioration of the matrix material, improving bonding strength and increasing bonding reliability.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the entire solid phase bonding apparatus used in one embodiment of the present invention, and FIGS.
FIG. 4 is a cross-sectional side view and a longitudinal front view of a deformation restraint jig which is not shown in the drawings and which is a part of the solid-phase bonding device; FIG. . (4)...Deformation restraining jig, (5)...Workpiece, (
5a)...Joint surface.

Claims (1)

[Claims] A method of holding a pair of objects to be welded and pressing them against each other through the joint surfaces of the objects to be welded, a method of covering the joint portions of the objects to be welded facing each other with an eccentric restraint jig, and the above method. a method of pressurizing the joint portion in a direction substantially perpendicular to the opposing pressing direction, the joining surface of the object to be joined being pressed at a certain angle from two directions perpendicular to the opposing pressing direction and orthogonal to each other; A solid phase bonding method characterized by forming on an inclined surface.