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JP3835869B2 |
To provide a bending method for a pipe and a shape having an excellent appearance in the bent part of the pipe and the shape after bending. In this method, the pipe or shape 1 is bent into a prescribed curvature using a bending die 3. In...
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JP2006272349A |
To provide a metal pipe bending device capable of eliminating the instability associated with the urging force control, and simplifying the bending operation and the device configuration.The metal pipe bending device comprises a small di...
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JP2006247664A |
To provide an elbow cold bending method having excellent forming efficiency and working yield by applying the optimum mandrel shape and excellent lubrication performance.In the steel tube cold working method for forming an elbow by pushi...
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JP2006231337A |
To provide a method for bending a metallic pipe, in which the method hardly causes wrinkles, etc. even in any bending portions of the metallic pipe.Both end portions of the straight metallic pipe 5 are fixed to a pair of pipe end support...
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JP2006224185A |
To provide a method for manufacturing a bent pipe with a helical groove capable of preventing projecting portions on the inner bend side from being brought close to each other or interfered with each other, or projecting portions on the ...
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JP3812974B2 |
To provide an equipment capable of effectively controlling generation of sectional deformation and wrinkles in a simple process, and simple in structure. A double tube 4 in which an outer tube 4a and inner tube 4b to be inserted in the o...
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JP3798082B2 |
To provide a bending device for a hollow double pipe that is used for example for the exhaust pipe of an internal combustion engine, a bending device capable of superior bending even in using a thin inner pipe. An inner mandrel 5 is inse...
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JP3794219B2 |
To provide a work vibrating device to improve a working environment of filling/discharging of powder by suppressing noise generation. A work vibrating device is provided with a part feeder 3 arranged in main body frame 2 through a vibrat...
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JP3783325B2 |
To smooth the inner wall surface of a pipe and to attain continuous expanding and bending by restraining the heat generation of the pipe. In the pipe bending device composed of the core member 2 guiding the pipe 1 fed in the axial direct...
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JP3781489B2 |
To obtain a bending device having a cutting mechanism capable of efficiently bending and cutting. An expanding member 8 larger than the inner diameter of the pipe 1 is inserted into the pipe 1 to push the pipe 1w out in the axial directi...
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JP3778961B2 |
PURPOSE: To provide the production method of a cylindrical member for an automobile structure to produce the structure having the cross section of approximate polygonal shape bent in two or three dimensional directions without generating...
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JP3773311B2 |
To restrain the generation of cross section deformations and wrinkles with a simple structure and process in the case of bending a double tube. In the case of bending the double tube by holding the double tube 4 having an outer tube 4a a...
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JP3773307B2 |
To provide an equipment capable of effectively controlling generation of sectional deformation and wrinkles with a simple structure. One of a pair of shut-off members 50, 52 to be inserted in a tube 4 across a part to be bent of the tube...
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JP3770335B2 |
To produce a metallic hollow product which can simplify the manufacturing process without using a precise die. In the method for manufacturing a hollow product having a cavity in the inner part, a filling process S1, cooling process S2 a...
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JP3759502B2 |
To provide a pipe in which a usable space can be secured by reducing a dead space of a pipe to be arranged in a heat exchanger or the like, a working method capable of molding the pipe in less working processes, and a working device. The...
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JP3746949B2 |
To efficiently manufacture an elbow joint having a cladding layer of welding in the inner surface, simplifying the manufacturing process and facilitating the forming wok of a cladding layer of welding with thickness of the formed claddin...
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JP2006043767A |
To provide a method hot-bending a metallic tube by which the flattening of the metallic tube is suppressed with a device arranged inside the metallic tube and also this suppression is performed while preventing the generation of irregula...
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JP3746835B2 |
To eliminate large electric input, to facilitate to generate resonance of vibration, and to enable ultrasonic vibration and bending of a floating plug part even in bending with using a floating plug with a joint. The device consists of a...
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JP2006035235A |
To easily and surely form a small-diameter part, which is made eccentric, integrally by applying simple cold plastic working to a metallic tube material.A method for working a metal tube is used for forming a tapered part 10 and a small-...
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JP2006502864A |
A tube bender comprising a mandrel, a forming member connected to the mandrel for coaction with the mandrel to effectuate bending of a tube wherein the forming member has at least two bending positions defined thereon, a handle pivotally...
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JP3725842B2 |
To provide a pipe bending machine and a pipe bending method by which small radius bending process of pipes can be carried out without setting a push out space at a pipe end portion and yield rate can be improved. In the pipe bending mach...
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JP3718247B2 |
PURPOSE: To prevent wrinkles on the internal bending part inside a polyvinyl chloride- coated steel tube from generating by compressing a part to be bent and the neighborhood into an oblong circular cross-section and bending the part alo...
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JP2005279745A |
To provide a method for bending a large diameter steel pipe, a method that substantially retains the properties of the steel pipe, that has a high yield of materials compared with the conventional level and high post-machining dimensiona...
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JP3691069B2 |
The method includes a pipe section of suitable metallic material being filled with a filling material and then put in a press consisting of a shaped die (14) and a shaped-end punch (15), with two dies (13a,13b) at the ends of the pipe se...
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JP2005224850A |
To provide a mandrel which does not produce wrinkling or cross-sectional deformation during a bending process.In the push bending of a hollow shape 51, the mandrel 55 is placed inside the hollow shape 51 in a bending area. The mandrel is...
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JP3686347B2 |
To provide a method capable of stably bending a metallic pipe so that wrinkles caused in the inner circumferential part of the bend of the pipe are formed into a uniform shape. A forming part 23 made into a wave shape is provided in a co...
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JP2005205483A |
To provide a core for bending a pipe having a simple structure capable of preventing generation of wrinkles on the inner bending side of a round pipe, and preventing the round pipe from being held on the inner bending side.In a turning c...
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JP2005205482A |
To provide a core for bending a pipe having a simple structure capable of preventing generation of wrinkles on the inner bending side of a round pipe, and preventing the round pipe from being held on the inner bending side.An outer surfa...
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JP2005206998A |
To produce a springy fiber rope, by using a core material comprising a steel wire, or the like, having a flexural spring performance, namely, flexural elasticity, a shape memory alloy or a rubber strand, or the like, as a central part of...
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JP3676871B2 |
To provide a bending device having a simple structure capable of easily and continuously performing two-dimensional and three-dimensional bending. In this device, the fixing end side F of the hollow double tube P is constrained with a be...
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JP2005521559A |
The invention relates to a process and a device for bending closed hollow sections. Said hollow sections are impinged upon by internal pressure. At the same time, the section being bent is supported on the inside by one or several mandel...
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JP2005186143A |
To enhance the production efficiency by rapidly applying lubricant to an inner surface of a tube when performing rotary draw-bending of the tube.A lubricant applying means 14 to apply lubricant to an inner surface of a tube is provided o...
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JP3658940B2 |
To efficiently perform two dimensional or three dimensional complex bend-working with high precision by forecasting with high precision and easily the spring back quantity of the penetrating-bending of an extruded aluminum (A1) shape. Fr...
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JP3642404B2 |
To provide a fluid pressure forming method in which a thickness of a specific side in a polygon cross-sectioned portion can be thicker than that of an original tube material, and a mechanical strength of a formed product can be also impr...
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JP2005095956A |
To provide a metal pipe bending machine which is designed to shorten a bending process in which the bend radius of the metal pipe is optionally varied by means of a press machine, can restrain the flatness of the metal pipe during the be...
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JP3637658B2 |
To miniaturize a device for bending a metallic pipe by installing plural pipe bending dies of different radiuses on the rotary shaft. With a pipe bending die 2 standing by, a metallic pipe 6 with a required length is fed by an automatic ...
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JP3636444B2 |
A bending device is described for thin-walled metal tubes (R) made of a straight tube guide ( 1 ), a core template ( 2 ), which adjoins the tube guide ( 1 ) and is pivotable in relation thereto, having a connection strip ( 3 ), and a man...
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JP2005074456A |
To provide a method for bending a pipe and a core metal used for the bending which realize suppression of the wrinkle at the inside of the bending part and the flattening and the breakage at the outside of the bending part and also reali...
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JP3632802B2 |
To perform bending and drilling at a single setup, and optionally select the shape of holes. A combined processing device 1 is made up of a bed 2, a drilling mechanism 10 provided on the bed 2, a work fixing die 19, a bending mechanism 2...
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JP3625154B2 |
A first mandrel segment comprised of first and second resinous sheets including proximal end portions vertically spaced from each other is initially inserted into a pipe having a weld seam extending longitudinally thereof. Since the firs...
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JP3621194B2 |
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JP3616196B2 |
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JP3613785B2 |
To provide a pipe bender with which the cross-sectional shape in a bend part is properly changed in the process of bend-forming and to facilitate the use as pipe stock for hydroforming. In the pipe bender in which a pipe P which is an ob...
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JP2005014060A |
To provide a mandrel and a method for bending a tube which can prevent the crush of the tube and can also materialize an automated bending process at low cost.Two cylindrical mandrel portions are engaged at their ends like a nest, and on...
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JP2005007438A |
To obtain a mandrel for bending with a simple structure and sufficient rigidity.The mandrel for the bending is provided with a plurality of plugs 12 having the spherical outer periphery. A fulcrum pin 16 is mounted to each of the plugs 1...
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JP2004344966A |
To provide a freezing method and a freezer in which a frozen state of a frozen object successively used for the succeeding process can be equalized to the utmost.The frozen object is frozen as follows. It is moved in a hung and immersed ...
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JP2004344951A |
To inexpensively obtain a multilayer pipe which has a bent part excellent in appearance.The multilayer pipe 3 is at least composed of an inner pipe 1 and an outer pipe 2. A fibrous filler 4 is arranged between the inner pipe 1 and the ou...
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JP2004322186A |
To suitably prevent crushing, buckling, extreme reducing of thickness, breakage, development of wrinkles, etc., which can occur when a tube is bent.A pushing piece 8 is fitted to a pressure die 4 in a bending apparatus 1 and the end surf...
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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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