PROBLEM TO BE SOLVED: To provide a bending method for a narrow diameter metal tube for bending so as not to generate a clamp flaw on the surface of a narrow diameter metal tube to be worked. SOLUTION: When a working direction of a narrow diameter metal tube to be worked is set and bending is conducted by a bending roll, a tube clamp jig, and a reaction force receiver, after the narrow diameter met...

PROBLEM TO BE SOLVED: To provide a tube end working tool which can be mounted to a general purpose machine and conduct flaring of a tube end in a single process. SOLUTION: A tube end working tool is constituted of a shank connected to a rotation drive part of a general purpose machine, a frame engaged to the shank, one or more roller for flaring a tube end mounted to the frame and a mandrel rotata...

PROBLEM TO BE SOLVED: To provide a method for joining steel to a titanium material by which steel can be joined to the titanium material in a single brazing process and strength of a joined part can be made to be higher than strength of a parent material. SOLUTION: When the steel 1 containing >=0.05 wt.% C is joined to the titanium material 2 such as Ti or a Ti alloy constituted mainly of &alpha ...

PROBLEM TO BE SOLVED: To exactly detect defectives in posture, positioning and quality, etc., of a welded nut and to surely prevent the welding in a defective state. SOLUTION: An air passage 15c which allows air to flow out of the lower end surface of a movable electrode 15 is disposed. When the movable electrode 15 is pressed on the welded nut 9, the compressed air is supplied to the air passage ...

PROBLEM TO BE SOLVED: To provide a jig for friction stir joining of works such as section and section panel in which clamps composed of vices are disposed on both side of a central supporting base and the adjustment of clamp position corresponding to the change of width of the works can be easily and quickly performed by devising a clamp mechanism composed of vices. SOLUTION: A C clamp is constitu...

PROBLEM TO BE SOLVED: To provide a joining tool which eliminates the generation of burrs which remain on the joining surface and improves the surface finish of friction stir joining part. SOLUTION: When the joining tool which is inclined in an angle of advance &theta is advanced, a rear part in the advancing direction of a flattening surface 13 is made parallel with the joining surface of the pane...

PROBLEM TO BE SOLVED: To allow a hollow section excellent joining from one side of the surface irrespective of the dimensional precision of the hollow forming material, etc. SOLUTION: A butt part between face plates 12b, 22b of sections 10, 20 is subjected to the friction stir joining. Subsequently, a connection material 30 is placed and one edge of the connection material 30 is abutted on the edg...

PROBLEM TO BE SOLVED: To allow a hollow section excellent joining from one side of the surface irrespective of the dimensional precision of the hollow section, etc. SOLUTION: A butt part between face plates 12b, 22b of sections 10, 20 is subjected to the friction stir joining. Subsequently, a connection material 30 is placed and one edge of the connection material 30 is abutted on the edge part of...

PROBLEM TO BE SOLVED: To provide a friction stir joining method of long size material made of aluminum such as a section panel which enables preventing the deterioration of flatness of the joining surface and joining strength of the joining part by filling up a gap between butt surfaces with filler material even when the gap is large. SOLUTION: This friction stir joining method which joins the lon...

PROBLEM TO BE SOLVED: To provide a coupling structure of friction stir joining hollow material in which the hollow materials are subjected to friction stir joining with an ordinary structure without having a specific structure prepared for the friction stir joining. SOLUTION: The hollow materials are formed the a truss structure of sectional shape of a trapezoid in which the width of a front skin ...

PROBLEM TO BE SOLVED: To find out a construction design criteria of a friction stir joining tool which is simple and most reasonable for improving fatigue strength as much as possible and, in accordance therewith, to enable performing the construction design for a pin of joining tool easily. SOLUTION: This friction stir joining tool which and advances in a forwardingly inclined state is designed i...

PROBLEM TO BE SOLVED: To make a structure body made by joining members having two face plates and a rib which connects the face plates by a friction stir joining light in weight. SOLUTION: The tip parts of face plates 21 and 22 of a hollow shape member 20 are connected by a rib 24, and joined with the tip parts of the face plates 11 and 12 of a hollow shape member 10 by a friction stir joining met...

PROBLEM TO BE SOLVED: To provide a method of manufacturing for a joined joint having an excellent fatigue strength, with which a joined joint having an excellent fatigue strength is easily manufactured. SOLUTION: A tensile force is given the joined part of a joined joint J1 joined by a friction stir joining so that a tensile stress as large as 50 to 90% of the proof stress of the joined part is ge...

PROBLEM TO BE SOLVED: To provide a compact and low-cost work machine in which aligning between a cutting tool and a guide bush is not required, and in which the cutting tool and the guide bush can be easily changed. SOLUTION: A tool holder 22 provided with a cutting tool 20 is detachably installed on a first movable device, and a chuck for holding a guide bush 24 is installed on a second movable d...

PROBLEM TO BE SOLVED: To provide a work fixing device that can permit economical machining of a metal tube or metal bar stock as a workpiece and can prevent a flaw in the metal tube or the like posed when it is fixed. SOLUTION: Three combinable split chucks 16 are fixed to bearers 14 spaced on an end face of a scroll chuck 12 in equiangular relation. The bearers 14 are radially movable on the end ...

PROBLEM TO BE SOLVED: To provide a method of manufacturing a precise inner periphery cutter blade allowing good formation of a grinding abrasive grain layer while inhibiting the bending of a hollow substrate during forming the grinding abrasive grain layer on the side face of the hollow substrate, and a tensile force granting jig suitably used in the method. SOLUTION: The method of manufacturing t...

PROBLEM TO BE SOLVED: To parallelly oscillate and support a safety cover for a cutter in a stem and leaf cutting device while slightly floating it elastically supported. SOLUTION: This stem and leaf cutting device comprises a carrying conveyor for carrying rootcrops, a cutter for cutting stem and leaf portions of the rootcrops and a cover for the cutter. The cover, parallelly elevatable, has an el...

PROBLEM TO BE SOLVED: To provide a multi-blade cutter in which a multi-blade body can be attached/detached automatically and is not deflected by its own weight. SOLUTION: The first spindle body 11 and the second spindle body 12 are installed on a column 1b installed in a device main body 1 through a movable table 9, the multi-blade body 8 is formed attachably/detachably, and the first spindle body...

PROBLEM TO BE SOLVED: To provide an apparatus for cutting an ingot which can efficiently cut the hard ingot which has a large bore diameter and is difficult to be processed, while a margin for cutting, the warpage of a finished surface, nonuniformity in thickness, and crystal damage by processing are reduced, and is low in running costs and capable of labor saving, and a method for the apparatus. ...

PROBLEM TO BE SOLVED: To provide a heat shrinkable polyester-based film which shows excellence in high speed mountability and finishing of shrinkage without increasing a setting value of thickness compared with that of the prior art in all applications including a small size PET bottle. SOLUTION: A heat shrinkable polyester-based film is characterized in that it includes isophthalic acid of not le...