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JP3297214B2 |
PURPOSE: To provide a bending method and a machine therefor where the same shaped metallic member can be bent with a different radius of curvature by the same machine. CONSTITUTION: In banding a long size shaped metallic member, the shap...
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JP2002155744A |
To provide a method and device for securely bending a double tube efficiently and economically with a simple structure.One end 10A of a tube body 10 to be bent is sealed with a lid member 30, and a plug member 40 is mounted on the other ...
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JP2002147981A |
To provide a heat exchanger tube superior in repetitive inner pressure fatigue characteristics and a finned tube heat exchanger which is capable of high pressure operation using this heat exchanger tube, and suited to non- azeotrope refr...
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JP2002120018A |
To provide a double tube bending method for preventing reduction of wall thickness on the outer side when bending a double tube, and a device thereof.The double tube 4 having an outer tube 4a and an inner tube 4b inserted in the outer tu...
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JP2002113524A |
To impart a pressure required for a whole tube inner face of a working region in a process of working, to prevent a wrinkle and a shape defect in bending/flattening a tube, to commonly use for manufacturing worked products having various...
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JP3267344B2 |
PURPOSE: To obtain a high tube bending quality by effectively preventing a deformation of tube which is inconvenient following to bending. CONSTITUTION: In a state clamping a tube with a bending die 2, a clamp stand 3 and a pressure stan...
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JP3267343B2 |
PURPOSE: To easily and accurately change and regulate an energizing force. CONSTITUTION: In a state clamping a tube with a bending die 2, a clamp stand 3 and a pressure stand 4, the device is provided with a bend driving means 6 rotating...
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JP2002001417A |
To provide a tube forming apparatus capable of forming a coil of long sized tubes and to provide a grooved drum for tubular coil forming capable of easily picking up the tubular coil after forming.In a continuously tube forming apparatus...
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JP3240078B2 |
PURPOSE: To efficiently form a high quality metallic tube in which a collapse, cracks, breakages and wrinkles are not caused on the bent part and which is provided with a small radius of curvature. CONSTITUTION: An approximate end part o...
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JP3233296B2 |
PURPOSE: To eliminate a large-scale device for freezing, thawing, packing, discharge, etc., and the manhour, to bend a multiple tube with a simple jig, and also, to facilitate the insertion and setting the jig before bending and the draw...
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JP2001324064A |
To provide a metallic pipe without possibility of crack due to work hardening, lighter in weight compared to a thick wall pipe.This double structure metallic pipe 10 has a structure of an inner pipe 11 and an outer pipe 12 closely contac...
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JP2001269721A |
To provide a method and an apparatus to draw/bend a double tube in a high coaxial precision at a low cost. A mandrel 5 for inner tube is inserted into an inner tube of the double tube, in which the inner tube I is inserted/fitted to an o...
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JP2001232421A |
To provide a mandrel for a tube bender suffering a reduced change in a cross sectional shape in bending.The mandrel for a tube bender in which mandrel pieces having an outer peripheral face of a prescribed width corresponding to a tube i...
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JP2001205352A |
To provide a mandrel for bending of a bellow tube used for bending the bellow tube having a bellow-shaped cross section in the direction orthogonal to the axis of an inner tube. In the mandrel for bending, which has plural mandrel pieces...
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JP2001509737A |
A bending device for bending tubes, especially composite tubes. The bending device comprises at least two bending mandrels that each include a main part movable at most in the axial direction of the tubes. Each bending mandrel also inclu...
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JP3171696B2 |
PURPOSE: To reduce a post treatment operation after bending a tube and to avoid the waste of tube material. CONSTITUTION: In a state clamping a tube with a bending die 2, a clamp stand 3 and a pressure stand 4, a bend driving means 6 mov...
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JP2001137958A |
To provide a mandrel for bending capable of reducing friction resistance between the mandrel and a work and effectively preventing generation of an inner face flaw and buckling of a work. Narrow grooves 6 to hold a lubrication oil are fo...
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JP2001137959A |
To provide a mandrel for bending and a bending method with using the mandrel excellent in insertion operability of the mandrel and capable of eliminating the risk of distortion deformation and flaw of the work in bending. A heating heate...
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JP2001121217A |
To provide a flexible core rod capable of keeping a predetermined shape during the pressing and being easily pulled out after the pressing when a hollow member of a three-dimensional curved surface is pressed from a plate. The flexible c...
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JP2001105034A |
To provide a pipe bender whose mandrel is smoothly slid in the curved part of a tube to be worked even when a lubricant is not applied to the mandrel with which the seizure of the inner surface of the tube to be worked and the mandrel wh...
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JP2001105038A |
To provide a bending method of a board-type heat pipe for obtaining a board-type heat pipe having a prescribed shape by which loss of space is not caused in the region for installing parts to be cooled by executing bending work to at lea...
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JP2001080366A |
To prevent the degradation of insertion workability and breakage of a core by suppressing plastic deformation in inserting the core in glass run material and repeating bending work by a bending device. This core 20 for inserting in a hol...
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JP3146036B2 |
PURPOSE: To bend a light metallic material of aluminum having a box shape in section, such as a bumper of an automobile, which varies in the curvature of the bent surfaces of the outer flanks and inner flanks thereof, by a press in a man...
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JP2001001045A |
To correct/remove deformation such as wrinkle and dent generated after working and to obtain a bent tube having a fixed inner diameter by performing bending in a conventional way, clamping a tube with upper/lower clamp dies and forcedly ...
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JP2001003741A |
To prevent breakage of a pipe during bending.In manufacture of a bent θ pipe, i.e., a pipe the internal part of which is partitioned into two sections by a partition plate, a partition plate before processing having flange parts 33 and ...
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JP2000335334A |
To increase the degree of freedom of the fitting and arranging position of an elastic foam, and to improve the workability.This bumper beam manufacturing method comprises an arranging process for inserting and arranging an elastic foam 2...
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JP2000312923A |
To mold plural concave parts of a precise shape in a pipe by a press processing, without applying a cutting processing, whose mass is light in weight, and whose processing expense does not go up. This method is provided with a charging p...
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JP3081327B2 |
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JP2000218322A |
To prevent interference with other members and obtain a functional piping at a low cost by putting a bent pipe having straight pipe portions and bent portion formed by bending a straight pipe in a die provided with a cavity of form a cle...
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JP2000190027A |
To reduce a number of winding points at a piping work by applying a bending processing to a linear shape steel pipe at a normal temperature, while molding a flange part at an end part of the steel pipe with plastic deformation, so that a...
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JP2000167624A |
To execute the bending work of a member having U-shaped cross section in the longitudinal direction of the cross section without forming wrinkles on a longitudinal metal.In a conventional press bender, a special mandrel 1 (plural elastic...
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JP2000138486A |
To deal freely with a required step without being restricted by the thickness of container by setting the outer circumferential thickness at a step bend part and a wing part including the step bend part as the main horizontal part of a c...
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JP2000117333A |
To prevent galling at the time of bending and to save working time.A head part 5 of a core bar made from zirconia-ceramics is brought into adhesion to an end tip of a body 1 of the core bar. The head part 5 of the core bar is semi-spheri...
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JP2000117334A |
To excellently execute bending of extruded material and at the same time to improve strength of the part of the extruded material subjected to bending.A hollow extruded material 10 to be bent and a core 12 having plural ribs 14 positione...
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JP2000102825A |
To provide a pipe molding method and a device capable of molding a pipe in short time while preventing occurrence of crack and buckle.A working pipe 5 which is fulfilled with water and tightly closed at its both ends 6, 7 with sealing ji...
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JP3002765B2 |
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JP2000015351A |
To make it possible to easily bend a hollow material by arranging a metallic body for foaming in this hollow material to cause foaming by heating and volumetric expansion thereof supporting the hollow material from its inside with the fo...
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JP3000017B1 |
In a bending method of a pipe material, in order to work it with employing a popular apparatus such as a press apparatus and prevent the pipe material from being made thin and cracks from being generated, one side of a cylindrical pipe m...
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JP2000000617A |
To obtain a desired shape highly precisely in a short time at the time of forming a cylindrical member whose middle part is constricted. By pressing core bars 27, 28 in both end parts of a base stock 6, the displacing part A and fixing p...
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JPH11342427A |
To prevent a bending part of a metallic hollow member from being cross sectionally deformed by firmly supporting the member from the inside with a sufficiently high fluid pressure, and enable a mandrel and a hollow member to slide freely...
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JP2978579B2 |
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JPH11512029A |
(57) [Summary] Tool rapid change methods and equipment for tube bending operations, including bending dies (34), clamp dies (35) and pressure dies (36) and, if necessary, mandrels and wiper dies (37) and the specific dies. Pre-assembled ...
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JP2960827B2 |
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JPH11267765A |
To enable bending of a long workpiece formed with a hollow in the core, without causing defects like flattening or wrinkled deformation due to bending stress. A workpiece of a hollow material is held by a tensile holding member 8 and adv...
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JP2948957B2 |
PURPOSE: To bend a pipe except the top end of which without interfering to the plug inserting mechanism and to nimbly move the bending mechanism at the working time together. CONSTITUTION: A bending mechanism 10 which has a bending die 1...
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JP2945897B1 |
A new sun visor for automobiles for providing multiple panels for use in different weather conditions. The inventive device includes a mounting bracket secured to an upper interior surface of a motor vehicle. A pair of swivel arms are co...
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JP2929958B2 |
PURPOSE: To eliminate the generation of the corrosion caused on the water and the abrasion of machine caused on the sand, etc., and to improve bending or the dimensional precision by filling a molten salt in a hollow space inside a tube,...
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JPH11207409A |
To provide a method and device for easily bending a metallic bar. By clamping the metallic bar 1 with clamping tools 11, 12 on both sides of a part 2 to be worked which is set into a proper length in the logitudinal direction, forming pl...
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JPH11179436A |
To bend hollow shapes and hollow shapes having a flange part at a small radius without generating any wrinkle and buckling with high precision and productivity. Bending within a proper range to an objective bending radius is executed by ...
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JPH11179437A |
To prevent the generation of buckling and wrinkles at the time of bending at a small radius and moreover to bend many kinds of shapes at a low cost in push-through bending for shapes. Plural slice-like pieces 20 having the same shape are...
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