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JP3585275B2 |
PURPOSE: To obtain a forming method which eliminates wrinkles on the inside of bending and cracks on the outside of bending, in the bending/forming of a material with a hollow cross section, by sliding the slide plate of a chuck clamping...
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JP2004283894A |
To detach a bent stock tube and set a stock tube to be bent next in a short time, and to enhance productivity and miniaturization of a bending device.In a bending method of a stock tube 30 for bending a middle portion of one stock tube 3...
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JP2004283892A |
To detach a bent stock tube and set a stock tube to be bent next in a short time, and to enhance productivity.A middle portion of a stock tube is bent while the stock tube 30 is filled with liquid. One end part of the stock tube is canti...
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JP2004283893A |
To enhance the working efficiency by reducing the working man hour.In a bending method of a stock tube 30 for bending a middle portion of one stock tube 30 at a plurality of points while both ends of the stock tube 30 are sealed with sea...
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JP3573776B2 |
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JP2004528480A |
A method for prolonging service life of a machine for bending tubes comprises flame spraying a coating of less than 0.1 mm of molybdenum or molybdenum alloy to at least one surface of a fold smoothing tool.
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JP2004181503A |
To provide a triple elbow for air supply/discharge pipes required to realize a triple air supply/discharge pipe of a boiler or the like, a manufacturing method therefor, and a jig and tool used in the manufacturing method.The elbow for a...
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JP3522077B2 |
To provide a tube manufacturing method by which the discharge time of a filler is shortened. The hollow double bent tube 1A in which solidified molten salt 7 is charged is immersed into the molten salt 7 in a liquid state in a salt bath ...
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JP2004114055A |
To provide a method for bending a metallic tube by which the occurrence of wall-thickness loss and cracks in the outer peripheral part and wrinkles and deformation in the inner peripheral part is prevented and also re-cutting stage is no...
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JP2004098117A |
To provide a die unit that can be manufactured easily in a short time even in a small working space and that is also reusable.This die unit is equipped with a deformable part 2a which has a deformable flexible tube 3 made of stainless st...
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JP2004098080A |
To eliminate bending defects by wrinkles of the inner tube at the time of bending a double-tube.An end section of the double-tube composed of an inner tube 2a and an outer tube 2b is pinched by a rotatable bender and a revolvable closed ...
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JP3509217B2 |
PURPOSE: To precisely form a special cross-section tube by bending with loading an internal pressure in a tube-like blank in which the circumferential length of each cross-section orthogonal to the axial direction is made almost the same...
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JP3504967B2 |
PURPOSE: To provide a manufacturing method and a manufacturing device for a bending pipe having non-round cross section in a good finishing condition. CONSTITUTION: A float pipe expanding plug 12 having non-round cross section is inserte...
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JP3505162B2 |
To provide a method for bending a measuring pipe capable of preliminarily prescribing the length of the linear measuring pipe, that is, the measuring pipe not subjected to bonding processing, and capable of in its turn obtaining the fina...
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JP3478748B2 |
To obtain a bending method for a double tube capable of obtaining the double tube having no wrinkle in an inner tube. In an outer tube 2, an inner tube 4 having a smaller outer diameter than the inner diameter of the outer tube is insert...
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JP2003320420A |
To prevent a curved inner peripheral wall from buckling by minimizing the curvature of a pipe bending part.A material thickness relief part 42 for relieving the curved inner peripheral wall in a curved part of a pipe 1 is provided in a g...
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JP3457705B2 |
PURPOSE: To hollow up and deform without breaking in severe bending and bend a work into a bent article having a bent part of small radius of curvature by making a bending mandrel of extrusion products of nylon. CONSTITUTION: Because a m...
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JP2003290838A |
To provide a drawing-bending method of a tubing by which bending of a small radius of the R/D of ≤1.5 is performed even when it is a base stock having small elongation by using an existing rotary drawing-bending apparatus.In a method f...
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JP2003275823A |
To make a bend radius smaller by reducing compressive force generated on a work during bending work as compared with conventional devices.In a push-through bending device in which the bending work is performed by passing a pipe P through...
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JP3448390B2 |
PURPOSE: To provide a method and device to produce a bent tube of excellent cross sectional precision in producing a bent tube of non round shape cross section with, floating/expanding plug bending. CONSTITUTION: When a tube stock 2 is m...
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JP3449491B2 |
PURPOSE: To provide a bending method which can form a metal bent tube with a small radius of curvature and high quality without generating crush or wrinkle on the bent part. CONSTITUTION: A bending process that a like work is bent with a...
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JP3444973B2 |
PURPOSE: To provide a pipe bending method by which extra small bending is smoothly performed and a pipe bending device which is easily manufactured and surely usable. CONSTITUTION: The device is provided with a supporting jig 1, forming ...
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JP2003211229A |
To facilitate the pushing of a double pipe without using a complicated mechanism.A double pipe bending apparatus includes a processing mechanism, a double pipe pushing mechanism having a chuck mechanism and a carriage, and an apparatus m...
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JP3427851B2 |
PURPOSE: To facilitate the changing operation of a mandrel by providing a projecting wall provided with a flange wall having a slit on the circumferential surface of a small diameter stepped part on the tip part side on a supporting rod,...
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JP3425459B2 |
PURPOSE: To facilitate the setting and changing of an appropriate core member in bending a tube of different diameter by making the core member to be mounted on the tip part of a supporting rod attachable/detachable in association with t...
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JP2003191023A |
To provide a bending tool for piping with which the flattening in the cross section of a pipe generated when piping by bending the pipe is prevented, and no trouble of the breakage of the pipe occurs.This tool is a bending tool for pipin...
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JP2003181543A |
To provide a bending device capable of solving such a conventional problem that bending stress can cause flat or wrinkled deformation on a cross section of a hollow-shaped material in bending to change the shape of the cross section.The ...
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JP2003145219A |
To provide a tube bending method and a deformation preventing tool used for the same by which the deformation of a metallic tube is prevented and also the properties of the inside surface of the metallic tube are not deteriorated.In the ...
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JP2003126915A |
To obtain a mandrel which has a simple structure and hardly generates wrinkles on the inner surface of a bent part of cylinder.A mandrel 1 is set to a prescribed bending portion of a cylinder 23, and the mandrel 1 comprises a plate mater...
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JP3391637B2 |
To make so that a disc member is not pressed up by forming an annular recessing part on the circumferential edge on a mandrel side in the disc member and receiving a mass increasing part generating on the inside face inside the annular r...
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JP3390486B2 |
PURPOSE: To properly feed a pipe in the axial direction even when bending plural places of the pipe and to easily apply pressure in the axial direction even when bending the vicinity of the rear end of the pipe. CONSTITUTION: This device...
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JP3384189B2 |
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JP3385061B2 |
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JP2003065481A |
To provide a system and a method to use a bent pipe in high-purity fluid handling systems capable of incorporating the bent pipe in a supply line, a production line and a vacuum preliminary step line in high purity fluid handling systems...
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JP2003053432A |
To provide a bending device with which a hard metallic pipe such as a stainless steel pipe is bent at a small radius of curvature. This device is constituted such that a mandrel which has an approximately equal outside diameter to the in...
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JP3379769B2 |
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JP3363975B2 |
PURPOSE: To efficiently manufacture a flat curved tube by inserting into a stock tube a flexible mandrel of the same height as that in the flat part of the product, and pressing the recessed side of the stock tube against the mandrel by ...
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JP3358431B2 |
To easily bend a metallic tube into the desired shape without changing its sectional shape. A first hollow metallic tube 3, and a second metallic tube 5 arranged in the first metallic tube 3 are provided, the second metallic tube 5 is se...
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JP3354795B2 |
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JP2002346641A |
To perfectly bend a hollow double pipe consisting of an outer and an inner pipes, keeping an aperture between both pipes. A bending device A is comprised of a mandrel 11 with a forming section 11c at its top, jig 12 which has multiple st...
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JP3352052B2 |
A method and apparatus for manufacturing a thick-walled bent pipe capable of manufacturing an elbow material for piping with higher size accuracy with use of a thick-walled pipe material are provided. For this purpose, the manufacturing ...
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JP2002336912A |
To realize a method and a device for forming sashes by which the generation of streaky flaws and ruggedness is prevented and the method and the device for forming sashes by which a strip is bent into smooth circular-arc shape.A pulling-o...
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JP3342533B2 |
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JP2002263738A |
To bend a tubular body of non-circular section with a minimum curvature without difficulty by forming a recess on the inner side of the neutral line at a curved part of the tubular body.In a method for bending the tubular body of non-cir...
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JP2002254112A |
To provide a pipe bending device capable of shortening bending time.First and second shut-off means 32, 33 are mounted on a pipe material 31, and a sealing machine 22 to seal fluid inside the pipe material 31 is provided. A bending devic...
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JP2002239639A |
To provide a method and a device for bending a pipe in which a pipe stock substantially need not be cut to the product dimension and the yield is excellent.In this pipe bending method, split cores split in the right-and-left direction at...
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JP2002219521A |
To provide a method and apparatus for warm-forming an elbow tube capable of restraining the generation of flats, deflection thickness, wrinkles in crank shaped tube stock through warm-forming processing and capable of improving yields an...
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JP2002219519A |
To provide a method and apparatus for forming an elbow tube capable of restraining the generation of flats, deflection thickness and wrinkles in crank shaped tube stock since an adjustment between the size of tensile strength for drawing...
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JP2002219526A |
To provide a method and apparatus for bending and forming a tube capable of simultaneously forming a tube material by bending and bulging the tube material and capable of successfully bending the tube material having a thin thickness and...
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JP2002219520A |
To provide a method and apparatus for warm-forming an elbow tube capable of restraining the generation of flats, deflection thickness, wrinkles in crank shaped tube stock through warm-forming processing and capable of improving yields an...
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