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JP2008126236A |
To provide a plastic working method by which a plastic working for drawing the end part of a hollow cylindrical workpiece into a semispherical shape or the like and also forming a hole part in the top part of a drawn part of the formed w...
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JP4086394B2 |
To provide a method and a device for molding a pipe material end part wherein a contraction part is easily and properly molded integrally at an end part of a pipe material. A roller 28 is supported movably in a diameter direction against...
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JPWO2006025369A1 |
The through hole of the die has an inner surface continuously formed by a bell, an approach and a bearing in order from the inlet side. The diameter of the approach is D1 on the inlet side and D2 on the exit side, and gradually decreases...
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JP2008073739A |
To provide a method for more easily forming a pipe joint, a method for fitting a pipe joint to a pipe material, and a joint method using the pipe joint.The pipe joint 1 is composed of: a cylindrical large diameter part 2; and a cylindric...
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JP2008504962A |
Disclosed is a pipe expanding device for expanding a thin pipe with a small diameter using elasticity and compressing and bending characteristics of a spring. Steel wires whose opposite contact sections are processed with a slope to be e...
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JP2008038599A |
To provide a tube end diameter reducing method of an exhaust system outer case which can prevent the outer case from being deformed at crimping work and an exhaust system outer case whose pipe end is reduced in diameter.In a tube end dia...
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JP2007327706A |
To provide a grooved tube 162 of new structure, a double tube 160 and its manufacturing method. The grooved tube 162 used as an inner tube of the double tube 160 has a grooved part M having a spiral groove 162a extending along the axial ...
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JP4025500B2 |
To provide a thin core which is thinner than a conventional one even when an aluminum alloy is used and ensures high rigidity. This method is for machining a thin core that material pipe 22' the outer surface of which is formed in a rece...
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JP2007301620A |
To provide a method and a device of flaring a tube by which the miniaturization of a flaring tool is contrived and the flaring of the tube in heat exchanging parts which are different in size is made possible by making the preparation of...
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JP2007533526A |
The road vehicle chassis frame (1) has double longitudinal members made of two square or rectangular-section beams (39,40) in contact. They are arranged one above the other, and are bent so that they fit together over their entire length...
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JP4003056B2 |
While a material pipe 1 and a roller 10 are revolved relative to each other with a predetermined radius, the material pipe 1 and the roller 10 are moved relative to each other in the direction of progress of forming by eccentrically movi...
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JP2007283375A |
To provide a method of squeezing work, which method can achieve high accuracy of the roundness formed by the squeezing work, and can form a flange portion in a short period of time after reducing a diameter of a pipe. In the method of th...
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JP2007283386A |
To provide a method of squeezing work, which method can achieve the high accuracy of the roundness formed by the squeezing work, and can finish the reduction of a pipe diameter and the grooving work in a short period of time. In the meth...
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JP2007283315A |
To provide a method for spinning a tube end by which thickness reduction apt to occur in a tapered part is suppressed as much as possible when forming a reduced diameter part by allowing a working roller on a tube end. After making work ...
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JP3991699B2 |
To prevent the buckling of a can body during forming by a reduction die, to perform large diametral reduction and to increase a tilting angle at the reduction working section. A fluid pressure holding tool 13 having an elastic film is in...
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JP3978809B2 |
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JP3978276B2 |
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JP3952991B2 |
To adjust a length of a pipe simultaneously with forming an enlarged part by plastic deformation, in a method of manufacturing a pipe having the enlarged part on its end part as the joint part. An arbitrary position of the pipe 20 is cla...
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JP3951275B2 |
To provide an electric flaring machine of which the main body is reduced in volume and made light-weight, which makes operations in an unstable high position be safely performed and makes its handling simple. A slider 15 which is moved f...
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JP2007181865A |
To provide a tapered metal tube in which a fore end thereof is tapered in a conical shape, and an opening is formed in a fore end face.Four parts in four directions at right angles from each other in a section of a circular metal tube (a...
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JP2007175761A |
To provide a method for directly forming a shaft hole having a flange in a metal plate.The shaft hole forming method for forming a shaft hole having a flange part 17 on a fore end by pressing a metal plate 20 includes an erection-working...
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JP3939286B2 |
To obtain a flanged tubular member such as a bumper stay having larger outside diameter than the diameter of a shaft part by electromagnetic forming without performing unreasonable expansion of the diameter. This member is composed of a ...
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JP2007160330A |
To provide an apparatus and a method for closing piping, which apparatus and method can perform the work for closing and removing the piping contaminated with radioactive materials, etc. without exposing the inside surface of the contami...
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JP2007136495A |
To provide a tapered steel tube manufacturing method capable of preventing degradation of the product accuracy by the change in the outside air temperature at low cost.In the tapered steel tube manufacturing method, a steel tube is taper...
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JP2007136498A |
To provide a method of manufacturing a catalytic converter by which working time is shortened, fraction defective is reduced and also a cone part is easily formed even when it has high diameter reduction rate.This method of manufacturing...
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JP3919861B2 |
To provide pipe structure for a vehicle facilitating assembly and reducing cost by pressing a pipe member axially to form flanges, projecting radially outward, at the pipe member. A pipe member 20 constituting a cross member of a vehicle...
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JP2007125579A |
To shorten working time by increasing forming speed without generating buckling when reducing the diameter in the end part of a metallic pipe.In a forming method, a plurality of ring-like tools 11, 12 which have axial centers 11a, 12a pa...
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JP2007512140A |
Production of a coupling on a pipe (1), preferably made from copper, nickel or iron alloys comprises completely or partially compressing the region of the pipe end that is to be or has been expanded using a force acting on the pipe when ...
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JP2007120365A |
To provide a method for manufacturing a vehicular muffler capable of preventing radiation noise caused by pressure pulsation of exhaust gas by improving stiffness of a shell by forming a flat part without using liquid pressure bulge form...
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JP2007113590A |
To provide a pressure container liner in which there exists no stress-concentrated portion therein with weight-saving realized.The pressure container liner 1 comprises: a cylindrical barrel 2; partially-spherical mirror plates 3, 4 for c...
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JP3905278B2 |
To easily and surely solve problems such as crash of a tube opening, and rigidly hold the tube to a header member with respect to an opening enlarging pawl for a heat exchanger tube for enlarging the opening diameter of a compressed tube...
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JP2007090365A |
To provide a method of manufacturing a tapered steel pipe by which the precision of a product is stabilized by suppressing the deflection of a clamping device for a pipe material.In the method of manufacturing the tapered steel pipe by w...
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JP2007090375A |
To provide a device for expanding the tube end of a metallic tube by which an expanded part can be secured in a predetermined size even when the wall thickness of the metallic tube is thin.This device is provided with a clamp 1 and a exp...
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JP2007077807A |
To provide a metal touch type fuel pipe connection structure for a direct-injection internal combustion engine having high sealing performance.The fuel pipe connection structure for direct injection of alcohol or gasoline containing alco...
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JP2007061837A |
To improve the efficiency of flare-forming work and to prevent the occurrence of a trouble such as tendovaginitis by assisting the operation of a flare forming tool without making any change on an existing flare forming tool.This attachm...
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JP2007050423A |
To provide a method and a die for squeezing a metallic round pipe, by which method and die, the tip end portion of the metallic round pipe can be squeezed at a high squeezing ratio by applying the die method having a simple equipment mec...
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JP2007044704A |
To provide a forming apparatus which can uniformly fasten a plurality of split dies by a single driving source.First, a pipe material is fitted on a mandrel 30 to carry out the drawing and caulking of the pipe material. At this time, the...
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JP2007014983A |
To provide a method and an apparatus for forming a pipe which enables a quick and smooth reduction in the diameter of the end portion of a metallic pipe so as to have a non-axisymmetric shape cross section, such as an ellipse, a polygon....
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JP3864739B2 |
To easily form a tabular portion of a fitting bracket integrated with a metal tube. A pair of dies 15 are brought closely to each other and pressed externally against a steel tube 13 and a punch 17 for groove working is inserted from the...
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JP2006346695A |
To provide a spinning method which does not cause vibrations, wrinkles and cracks.A filler material made of foam resin is preliminarily injected or inserted into the inside of a pipe member, and the diameter of the pipe member is reduced...
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JP3855789B2 |
To provide a method and a device for reducing a can body in diameter, which can secure reduction per process larger than heretofore and expedite a forming speed, while not causing any problem of a support mechanism such as a bearing brou...
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JP2006320914A |
To provide a necking method of a rectangular can and its necking apparatus by which a can is necked into a stable shape even when it is the rectangular can.In the necking apparatus 10 for supporting the neck forming part 4c in the openin...
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JP2006315023A |
To obtain an end expanding device of a tube for heat exchangers providing with an end expanding member which can be inserted into a flat tube 112 and with which the expansion of an end is easily performed even when a portion of the openi...
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JP2006305587A |
To make the forming of a flange having a prescribed shape possible at low energy when forming the flange by expanding the end part of a tubular material made of aluminum by electromagnetic forming.The flange 22a is formed by expanding th...
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JP3839796B2 |
To provide a vehicular wheel rim having a hump portion of excellent dimensional accuracy. A first claw 30 and a second claw 32 holding a work (a vehicular wheel rim) W are stopped at predetermined position. An annular supporting member 1...
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JP3839794B2 |
To provide a wheel rim for a vehicle having a hump portion of excellent dimensional accuracy. A first claw 30 and a second claw 32 holding a work (the wheel rim for a vehicle) W are stopped at predetermined position. A right first die 16...
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JP3840537B2 |
To provide a structure of pseudo hollow metal balls which is capable of effectively absorbing impact energy from all directions, is high in the percentage of voids, is excellent in deformability and further has a high strength, and a fil...
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JP3839795B2 |
To provide a wheel rim for a vehicle having a hump portion of excellent dimensional accuracy. A first claw 30 and a second claw 32 holding a work (a vehicular wheel rim) W are stopped at predetermined position. A right first die 16b is c...
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JP2006289389A |
To provide an exhaust pipe and its manufacturing method, by which exhaust pipe and manufacturing method, manufacturing work can be smoothly performed by forming the portion to be engaged on an outer pipe 2 by means of forming rollers, an...
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JP3838690B2 |
To realize a motor-operated tube enlarging tool of being able to machine even against a high strength steel tube. In a motor-operated tube enlarging tool where a diameter enlarging member 39 to freely rotate on an axis being eccentric an...
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