A friction stir welding device that is configured to perform convention friction stir welding as well as self-reacting friction stir welding. A pin passes through an upper shoulder and can selectively attach to and detach from a lower shoulder in a preferred embodiment. A controller maintains the discrete position of, and/or force applied by, the upper and lower shoulders during self-reacting friction stir welding, or maintains the pin at a desired depth and/or applied force during conventional friction stir welding.

Auto-adjustable tool for self-reacting and conventional friction stir welding

In this invention, a tool drive unit (53) of a friction stir spot welding device is configured to move a pin member (11) and a shoulder member (12) forward and backward, and is controlled by a tool drive control unit (21). A press-fit reference point setting unit (22) sets the position of the pin member (11) or the shoulder member (12) when contacting an object to be welded (60) as the press-fit reference point. The tool drive control unit (21) controls the press-fit depth when a rotating tool (51) press-fits the object to be welded (60) starting at the surface thereof by controlling the relative location of the pin member (11) in relation to the shoulder member (12) based on the press-fit reference point. Thus, good welding quality with suitable precision in accordance with welding conditions can be achieved, especially with a double-acting type friction stir spot welding method.

Friction stir spot welding device and friction stir spot welding method

Disclosed is a method for hybrid welding in which a laser beam is applied to the welding position of objects to be welded, and at the same time, a first wire is fed to the welding position so as to perform arc welding using an arc generated between the objects to be welded and the first wire. In this method, one or more second wires are fed to a molten weld pool formed by the laser beam and arc welding, thereby increasing the amount of welding without increasing the arc current.

Hybrid welding method and hybrid welding apparatus

A friction stir welding (FSW) method and apparatus are provided by which power needed for FSW is reduced and a compact FSW tool can be used. In the FSW method, metal members are lapped one on another and a rotating probe of an FSW tool is inserted into a contact portion of the metal members. The contact portion is softened by frictional heat and stirred by the probe so that the metal members are welded together. A portion of the metal members surrounding the probe is heated by a heater.

Friction stir welding method and apparatus

PROBLEM TO BE SOLVED: To provide an electronic component mounting apparatus which highly precisely controls positioning of an electronic component in mounting the apparatus on a substrate to enable precise bonding/fixing and electrical connection of the electronic component to the substrate SOLUTION: The electronic component mounting apparatus 1 mounts the electric component 3 on a component mounting position on the surface of the substrate 2 via a premetalized coat The electronic component mounting apparatus 1 includes: a bonding table 12 bearing the substrate 2 thereon; a component transfer means 5 which transfers the electric component 3 to the component mounting position on the substrate 2; a microscope 6 which observes the horizontal positions of the substrate 2 and the electric component 3 from above them; and a component bonding means 9 which comes into contact from above with the electric component 3 transferred to the component mounting position on the substrate 2 by the component transfer means 5 to heat the electric component 3 COPYRIGHT: (C)2010,JPO&INPIT

Electronic component mounting apparatus

PROBLEM TO BE SOLVED: To provide linear oscillation type equipment for friction welding which is miniaturized and portable, and accommodating to a variety of works to be welded and welding conditions. SOLUTION: The linear oscillation type equipment for friction welding in which a member A to be welded clamped by a holder on the non-oscillation side and a member B to be welded clamped by a holder on the oscillation side are friction-welded, is composed of a slide frame which supports an oscillate member provided with a oscillate side holder in a manner that the oscillate frame is reciprocally movable in the horizontal direction, a pressurizing stand which guides to allow the slide frame vertically move and is provided with a pressurizing cylinder at upper part and a non-oscillate side holder at lower part, a vibration excitation mechanism which oscillates the oscillate member in the horizontal direction by a rotating motor for vibration excitation and an eccentric cam, and a linear bearing between the slide frame and the oscillate member. The oscillate member is pressurized downward by the pressurizing cylinder via the slide frame and the linear bearing, thus the member B to be welded and the member A to be welded are pressurized.

Linear oscillation type equipment for friction welding

PROBLEM TO BE SOLVED: To provide a residual stress improvement method capable of simply, quickly and surely improving a residual stress in a tubular body by reducing the residual stress in a tensile state by heating the tubular body or making the body to a compressing state. SOLUTION: This method comprises: an irradiating process with laser beam Lz to a stress improving range Sr desirable to improve the residual stress in the tubular body Pi; a temperature measuring process for measuring the temperature in the stress improving range Sr; a cooling process for stopping the irradiation with the laser beam and cooling after becoming a prescribed temperature difference to the inner and the outer surfaces of the stress improving region Sr; and a moving process for moving the laser beam Lz in the stress improving region Sr to the non-irradiation portion in a laser beam irradiation part 1 after completing the cooling process. COPYRIGHT: (C)2005,JPO&NCIPI

Method and apparatus for improving residual stress in tubular body

PROBLEM TO BE SOLVED: To provide a friction stir welding apparatus and its welding method, by which high quality welding can be efficiently carried out by effectively utilizing heating means other than frictional heating even for the workpiece into which heat is easily accumulated because of their shapes and properties of material, or on the contrary, the workpiece from which heat is easily dissipated even during preheating. SOLUTION: The friction stir welding apparatus uses a probe type or bobbin type rotary tool 20 having a small diameter portion 22, which is inserted into a welding portion so as to be stirred, and a large diameter portion 21, which is pressed against the welding surface so as to slide. The heating to be carried out at a front position on a welding line is carried out by a heating means such that the temperature is not higher than the softening temperature carried out by self-heating, such as high frequency induction heating. Another heating to be carried out on a welding position together with the frictional heating is carried out by self-heating, such as high frequency induction heating, or by electric resistance heating applied to a base material from the small diameter portion. Further, the apparatus includes a cooling means for cooling a heat affected zone in the back of the welded position after the friction stir welding has been finished. COPYRIGHT: (C)2004,JPO

Friction stir welding apparatus, and its welding method

PROBLEM TO BE SOLVED: To make welding and surface layer reforming possible by friction stir for a workpiece composed of a high melting point material, in a friction stir welding method in which a workpiece is welded through plastic flow by frictional heat produced between a rotary tool and the workpiece by inserting the rotary tool into the workpiece and rotatably moving it. SOLUTION: Welding or reforming by friction stir is performed with a weld zone s heated by irradiating it with a laser beam, or with an insert 3 placed between welding faces, or with the above two means combinedly used. Irradiation of the laser beam fluidizes even a high melting point material. Also, placing the insert between the welding faces causes adiabatic effect to be imparted between the insert and the workpiece, preventing the frictional heat from diffusing. COPYRIGHT: (C)2006,JPO&NCIPI

Friction stir welding method and reforming method thereby

PROBLEM TO BE SOLVED: To perform joining in the state in which a base plate and a filler material can be easily aligned flat, eliminating a risk that the base plate and a groove line may deviate forward and backward or right and left, and releasing a softened area of the base plate from a risk of tear. SOLUTION: The friction stirring and joining apparatus comprises a bottom pressing member, a top pressing member, and a bobbin tool 1 composed of the two pressing members which are connected together by a fixed or changeable mother plate stirring shaft (probe shaft) 12 or facing each other. Sliding faces for friction heat input contacting the mother plate have different diameters between the two pressing members. The bottom pressing member is connected to the stirring shaft 12, while the top pressing member is loosely fitted to the stirring shaft 12, and the rotational direction of the top pressing member is set in the reverse direction of the bottom pressing member. A fitting hole, which has a rotation control part and a axial direction control part on the inside periphery, is prepared at the starting point of the friction stirring. The friction stirring and joining is started after the bobbin tool 1 is fitted into the fitting hole, while the stirring shaft is attached with the filler material to be fitted into the fitting hole. COPYRIGHT: (C)2004,JPO&NCIPI

Fujitani Yasuyuki

Papers

Linear oscillation type equipment for friction welding

Method and apparatus for improving residual stress in tubular body

Friction stir welding apparatus, and its welding method

Friction stir welding method and reforming method thereby

Friction stirring and joining method and apparatus