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JPH0819821A |
PURPOSE: To prevent a crack and the occurrence of the wrinkle of a plastic pipe part by pushing a mandrel after filling a packing material into the plastic steel pipe, and at the time of bending, pushing the plastic steel pipe toward a c...
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JPH0810857A |
PURPOSE: To uniformly and rapidly cool a large quantity of tubes with a compact tank capacity by supporting the plural tubes in an upright state on a framed truck, charging the tubes into a refrigeration chamber, blowing liquid nitrogen ...
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JPH07328725A |
PURPOSE: To suppress the compression of a resin composite tube, and to bend the tube without the occurrence of a failure such as rupture, various deformations, etc., by holding the tip part of the tube into which a plug with a diameter l...
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JPH07323335A |
PURPOSE: To provide a method for bending a hollow member where the mass production is possible, and the wrinkle depth is obtained so that the shape of the hollow member is hardly damaged even when the wrinkle is generated by preliminaril...
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JPH07314051A |
PURPOSE: To provide a tube bending method of generating no reduction of thickness at the outer surface side of the tube at the time of bending the tube. CONSTITUTION: A wire 6 having elongation resistance and flexibility in the bending d...
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JPH07314522A |
PURPOSE: To obtain a synthetic resin lining steel pipe having such structure as the synthetic resin lining layer formed on the inner face is not peeled off or broken when the pipe is bent through pipe bender system. CONSTITUTION: The syn...
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JPH07308719A |
PURPOSE: To prevent the occurrence of rupture, crack, etc., and to bend a flange by bending a cylindrical member to which elongation equal to that generated by bending, is previously given to the part to be bent of a flange, and making t...
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JPH07106391B2 |
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JPH07290157A |
PURPOSE: To provide a core bar for bending a pipe in an apparatus enabling the bending without occurrence of the shortage of oil and smoothly bending the pipe without deformation of crush, etc., due to elongation at the position bringing...
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JPH07290156A |
PURPOSE: To prevent scratch, etc., at the inside corner of bending at bent part of pipe by notching the part of the inside corner of bending of a mandrel so as not to be brought into contact with the inner wall surface of pipe. CONSTITUT...
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JPH07284855A |
PURPOSE: To provide a method and device for manufacturing a bent tube, in which the limit of a bend radius is improved, the ratio of uneven thickness of a bent tube manufactured is minimized, and also the outside diameter of the bent tub...
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JPH07275958A |
PURPOSE: To maintain a specified spacing between inside and outside tubes and to bend the tubes to a prescribed shape by confining granular materials, such as sand, into a cylindrical insertion part of a forming tool and bending the tube...
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JPH0796132B2 |
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JPH07265962A |
PURPOSE: To prevent the distortion, deformation and deterioration of a pipe due to high temp. by filling up a molten paraffin into a metallic pipe, bending the pipe after the paraffin is solidified and melting away the paraffin after wor...
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JPH0790291B2 |
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JPH0780016B2 |
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JPH07224987A |
PURPOSE: To reduce passage resistance and disperse stress concentration by disposing a thick-walled part, satisfying a specific condition, on the inside of a bent part, disposing shift parts of specific length on both sides of the thick-...
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JPH07214179A |
PURPOSE: To provide a manufacturing method and a manufacturing device for bent pipe being suitable to the manufacture of the bent pipe having small inner diameter. CONSTITUTION: A float pipe-expanding plug 12 is inserted into the inner p...
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JPH0771698B2 |
A method is described for the preparation of tubular copper or copper-alloy chills or ingot moulds shaped with their longitudinal axis substantially curved, and comprising a first stage in which the end of a tubular semi-finished product...
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JPH07178469A |
PURPOSE: To enhance the efficiency of tube length control in a tube bending mechanism by accurately controlling the orienting of the ends of a finite length segment, for example, of a U-shaped hairpin tube to a prescribed length. CONSTIT...
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JPH07171632A |
PURPOSE: To provide a bending device of Al or Al alloy extruded material capable of bending to the prescribed shape even in a case of small bending radius or in a case of complicated shape. CONSTITUTION: An Al or Al alloy extruded materi...
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JPH0733416U |
[Purpose] Even when bending with different lengths of hollow profiles and different curvatures of bending dies, it can be handled by simply replacing the bending dies or changing their mounting positions, which reduces work man-hours and...
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JPH07148531A |
PURPOSE: To bend an extruded shape of a tubular member consisting of aluminum and its alloy and having a hollow part for which severe bending is requested and which has an intricate sectional shape. CONSTITUTION: The elongation and stren...
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JPH07148530A |
PURPOSE: To prevent the generation of wrinkles by controllably arranging at least two mandrels relatively in the longitudinal direction of a tube during bending. CONSTITUTION: A DD tube 6 is provided with two single D tubes 7, 8, which a...
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JPH0741321B2 |
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JPH0724870B2 |
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JPH079517U |
[Purpose] In a processing method in which a pipe is inserted between a top roller and a bottom roller and the bottom roller is pressed in the direction of the top roller to bend the pipe, deformation when the pipe is pressed by the botto...
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JPH0739976A |
PURPOSE: To highly precisely form a seat where the seat for attaching parts between bent parts of a bent double tube. CONSTITUTION: Seats are formed respectively on internal and external tubes 11, 14 in the straight tube state. Next, the...
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JPH0739942A |
PURPOSE: To provide a method for bending metallic tube, which prevents burning flaws causing in a contact part between a plug and the inside surface of a tube and preventing the vibration of a mandrel connected to the plug by the use of ...
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JPH0698404B2 |
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JPH06335730A |
PURPOSE: To provide the inexpensive method capable of smoothly bending a pipe and protecting the bent part without flattering or crushing the pipe by using a spacer having an insertion part formed in a row of spherical bodies. CONSTITUTI...
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JPH06335729A |
PURPOSE: To provide the inexpensive method capable of smoothly bending a pipe and protecting the bent part light in weight without flattening or crushing the pipe by forming an insertion part to which plural flexible bar-like materials a...
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JPH06320222A |
PURPOSE: To provide a core bar which can bend a tubular material easily three dimensionally, prevent deformation of a cross-sectional shape and draw the tubular material easily. CONSTITUTION: The core bar 20 consists of solidly bundled w...
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JPH06315723A |
PURPOSE: To smoothly bend a tube without flattening or crushing a tube by the light weight and inexpensive spacer and to protect the part. CONSTITUTION: An inserting part 1 is composed of a bar like member having the flexibility, a tube ...
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JPH06312221A |
PURPOSE: To obtain excellent workability at forming of Al/Al alloy extruded shape in particular for a case hard to work as well as a material to be formed having a complicated cross section. CONSTITUTION: For Al/Al alloy extruded shape, ...
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JPH0641690Y2 |
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JPH0641689Y2 |
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JPH06292929A |
PURPOSE: To provide a device which is capable of forming complex-shaped frame members from a tubular blank. CONSTITUTION: A method for forming the frame members from the tubular blank 12 equipped with both ends is constituted of a step f...
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JPH06285551A |
PURPOSE: To dispense with deburring and to dispense with bi-washing by fitting a straight tube into a straight hole of a closed half die, fitting a projecting part of one mandrel of a force-fitting implement into the straight tube, allow...
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JPH0671630B2 |
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JPH0671632B2 |
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JPH06234022A |
PURPOSE: To prevent the generation of a wrinkle or a deformation by inserting into a hollow part of a hollow shape to be made to an outer circumferential side in bending with a core metal whose clearance against the hollow part is larger...
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JPH0661585B2 |
A method and an apparatus for bending pipes by clamping one end of the pipe between a formed roll and a rotary base and by turning the rotary base so that the pipe may be bent along the outer periphery of the formed roll. A mandrel suppo...
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JPH06226359A |
PURPOSE: To provide a method for machining a metallic fine tube so that the reliability for the mixture of a dust or a metal impurity can be improved and the production cost can be controlled. CONSTITUTION: The internal part of a stainle...
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JPH0659505B2 |
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JPH06218437A |
PURPOSE: To provide a high frequency bending method to a large diameter complicated pipe free from flaws on the inside surface of the back side. CONSTITUTION: The complicated pipe 3 wherein an inner layer 2 molded of corrosion resistant ...
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JPH06218436A |
PURPOSE: To prevent an outer pipe from buckling and cracking by providing a support member to axially support one end of an inner pipe part on a draw/ bend die and pressing the other end of the inner pipe part through a pressing die. CON...
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JPH06198349A |
PURPOSE: To adequately bend a hollow material without generating wrinkles and recessed parts. CONSTITUTION: A mandrel 4 consists of a deflectable part 2 and a drawing bar 3. The deflectable part 2 consisting of an inner member 9 with mul...
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JPH06185687A |
PURPOSE: To provide a pipe which is laid smoothly along a wall surface, which is made of lead, being incorporated in a wash stand, a closet or the like, and from which a water drain or ventilating pipe is formed having a curve with a pre...
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JPH06182431A |
PURPOSE: To efficiently produce intricate tubular articles by using a pipe material of copper (alloy) or Al (alloy) as an arbor and forming a film of boric acid (.salt) on its surface, then inserting the pipe material into a metallic tub...
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