WO2006064802A1 - 曲げ部を有する高圧用燃料噴射管とその曲げ加工方法およびその装置 - Google Patents
曲げ部を有する高圧用燃料噴射管とその曲げ加工方法およびその装置 Download PDFInfo
- Publication number
- WO2006064802A1 WO2006064802A1 PCT/JP2005/022877 JP2005022877W WO2006064802A1 WO 2006064802 A1 WO2006064802 A1 WO 2006064802A1 JP 2005022877 W JP2005022877 W JP 2005022877W WO 2006064802 A1 WO2006064802 A1 WO 2006064802A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bending
- pipe
- fuel injection
- injection pipe
- thin metal
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
- B21D7/025—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member and pulling or pushing the ends of the work
Definitions
- the present invention relates to a high-pressure fuel injection pipe used in a pressure accumulation fuel injection system using a common rail of a diesel engine and a bending technique thereof.
- a conventional bending cache technique for this type of high-pressure fuel injection pipe for example, a plurality of machining positions set in the axial direction of a thin metal pipe to be machined are set.
- a method of applying a bending force set in each processing direction is known, and the apparatus chucks one end of a thin metal pipe to be processed, and rotates the thin metal pipe to be processed around an axis.
- a pipe twisting unit that sets a predetermined machining direction and moves the thin metal pipe to be machined in the axial direction to set it to a predetermined position, and sandwiches the thin metal pipe to be machined It is configured to have a bending means that rotates a predetermined angle and bends the thin metal pipe to be processed, and is generally called a CNC bender (see Patent Document 1).
- FIG. 12 shows an example of a conventional bending method using a CNC bender.
- the CNC vendor -11 has a chuck device 11-2 that holds one end side of a thin metal pipe P1 to be covered.
- a small bending metal pipe P1 chucked by the chuck device is rotated around the axis to set a predetermined bending direction, and the small diameter metal pipe P1 is axially oriented.
- the pipe twisting unit 11-1 which is set to a predetermined cover position, the bending roller 12-1, and the small metal pipe P1 being pressed against the peripheral surface of the bending roller Then, the workpiece is rotated by a predetermined angle on the peripheral surface through the thin metal pipe to be processed, and the bending process is performed from the distal end side of the other end of the thin metal pipe to be processed, and sequentially bent toward one end.
- a bending device 12 having a clamping jig 12-2 to be processed and an anti-fitting 12-3 is provided. 13 is a separate bending jig.
- FIG. 12 shows a block-shaped member having a groove for the thin metal pipe P1 to be processed as the reaction member 12-3, it is preferably a roller-shaped reaction member having a groove or no groove.
- Ingredient (figure (Not shown).
- the clamping jig 12-2 and the reaction force receiving member or reaction force receiving roller 12-2 that rotate and bend a predetermined angle on the peripheral surface via
- the conventional diesel engine injection pipe has an inner diameter of ⁇ 6, ⁇ 6.35.
- Patent Document 1 Japanese Patent Laid-Open No. 2001-179347
- bent part The bending radius of the bent part (bent part) has been reduced, the flatness has exceeded 10%, and the inner surface accuracy of the injection pipe has been increased to prevent breakage due to repeated fatigue due to internal pressure. It is necessary to increase (reducing inner surface flaws), and there is a tendency to increase the pressure during use due to further exhaust gas regulations (in the case of high, it may exceed 2 OOMPa) .
- the present invention has been made in view of the conventional situation as described above, and has a bending portion used in a common rail system capable of preventing as much as possible fatigue failure in a bending casing portion.
- the purpose of this is to propose a fuel injection pipe, its bending method and apparatus.
- the fuel injection pipe for high pressure having a bent portion according to the present invention has a wall thickness / outer diameter ratio of 0.3 or less and at least one bent R portion of 2.7 times or less of the outer diameter. And the inside diameter flatness of the bent R portion is 9% or less, preferably 7% or less or 5% or less.
- a method for bending a high-pressure fuel injection pipe having a bending portion is a cross section of a thin metal pipe to be processed with a bending jig such as a bending tool, a clamping jig and a counter-fitting. Is bent in a substantially circular shape, and the portion corresponding to the bent portion of the metal tube is held while the thin metal tube to be processed is held by the bending tool. Is flattened so that the minor axis of the flat part is perpendicular to the bending plane, and the bending force is applied in the flattened state.
- a bending jig such as a bending tool, a clamping jig and a counter-fitting.
- the flat portion of the bent portion is corrected so that the flat portion is reduced, and the portion corresponding to the bent portion of the thin metal pipe to be processed is flattened by bending. After pressing and flattening in the direction opposite to the direction in advance, bending is performed. It features a, also after being subjected to the bending force ⁇ E, versus a flat portion caused by the bending mosquitoes ⁇ E The flat portion is subjected to a crushing process in the long axis direction so as to reduce the flatness.
- the method of the present invention is characterized in that when bending a thin metal tube to be processed, the tube body is filled with a medium in advance and subjected to a bending force, and the medium is removed after bending. is there.
- the bending apparatus for carrying out the above-described method of the present invention comprises a bending roller having an upper and lower split structure, and a small diameter metal tube while pressing the small diameter metal tube against the circumferential surface of the bending roller.
- a bending means having a clamp jig and a reaction force receiver having a vertically split structure that sequentially turns the thin metal pipe to be processed by rotating a predetermined angle on the peripheral surface via the metal pipe; It is a feature.
- the high-pressure fuel injection pipe having a bent portion has a flattened portion where the bent cache portion does not undergo fatigue failure from the inner peripheral surface because the flattened portion of the bent cache portion is small.
- the risk of breakage is greatly reduced.
- the flat portion of the bent portion is corrected so that the flat portion becomes small, and the flat portion is preliminarily flattened in the direction perpendicular to the flat direction caused by the bending, so that The flatness can be reduced, and the flatness generated by bending can be corrected by reducing the flatness by crushing the flattened portion from the long axis direction.
- a high-pressure fuel injection pipe having a section can be provided.
- it can withstand high pressure as a result, it is possible to further increase the injection pressure, and it has excellent effects such as purification of exhaust gas, improvement of fuel consumption, reduction of noise, and improvement of acceleration. Play.
- FIG. 1 is an explanatory view showing a high-pressure fuel injection pipe having a bent portion according to the present invention.
- (A) is an explanatory view showing a cross-sectional shape (perfect circle) of the high-pressure fuel injection pipe.
- FIG. 2 is a schematic view showing an embodiment of a bending cache device for a thin metal pipe according to the present invention, and
- FIG. (B) is a front view showing a bending roller and a clamping jig,
- (c) is a front view showing a block-shaped reaction force receiver, and FIG. Fig.
- FIG. 5 and FIG. 6 are schematic explanatory views showing an example of a method for flattening by pressing a bent portion of a thin metal pipe to be covered with a flat die.
- Fig. 5 (a) is a side view showing the state before pressing
- (b) is a longitudinal front view of the same
- Fig. 6 (a) is a side view showing the state after the pressing
- (b) is a vertical front view of the same.
- FIG. 7 and 8 are schematic explanatory diagrams showing an example of a method for flattening by pressing a bent portion of a thin metal pipe to be processed with an arc groove shape
- FIG. 7 (a) shows a state before pressing
- Fig. 8 (a) is a side view showing the state after pressing
- Fig. 8 (a) is a side view showing the state after pressing
- Fig. 9 and Fig. 10 are thin metal pipes to be processed.
- Shows an example of flattening method by pressing the bent part of the sheet with a roll mold 9A is a side view showing a state before pressing
- FIG. 9B is a vertical front view of the same
- FIG. 10A is a side view showing the state immediately after pressing
- FIG. FIG. 11 is a schematic view showing an example of a device using a thin metal pipe bending apparatus and a flattening device (crushing device) according to the present invention.
- the ratio of the thickness t / outer diameter H of the injection pipe P is 0.3 or less, At least one bend R portion P-1 less than 2.7 times the outer diameter H, and the inner diameter flatness Pr of the bend R portion P-1 should be 9% or less.
- the inner diameter flatness Pr is a value defined by the following formula 1.
- Minh Minimum inner diameter of pipe after bending (mm)
- the ratio of the wall thickness t / outer diameter H of the high-pressure fuel injection pipe P is defined to be 0.3 or less because when the ratio of t / H exceeds 0.3, This is because the pulsation of the nozzle increases and affects the injection quantity during injection.
- the bending R part P-1 is set to 2.7 times or less of the pipe outer diameter H. This is because the length of the tube is long and a large engine installation space is required, which is not preferable in terms of engine layout. Furthermore, the reason why the inner diameter flatness Pr of the bending R portion P_1 is set to 9% or less is as follows.
- the bending apparatus 1 is an apparatus that applies a bending force to the end of one end of the thin metal pipe P to be covered.
- the configuration has a chuck device 1_2 that chucks the other end of the thin metal pipe P to be covered, and the thin metal tube P to be machined chucked by this chuck device 1-2 is used as the axis.
- a pipe twisting unit 1-1 that rotates to the center to set a predetermined bending direction, and moves the thin metal pipe P to be processed in the axial direction to set one end side to a predetermined processing position;
- a bending roller 14 having a vertically divided structure 14 and a small angle on the circumferential surface through the thin metal pipe P while pressing the small metal pipe P to be covered against the circumferential surface of the bending roller.
- Bending device tensile bending method a) with clamping jig 15 and anti-fitting 16 There Les comprises a bending method) 1 3 compression, Ru.
- the bending roller 14, the clamp jig 15, and the counter-load receiving tool 16 having the vertically split structure are not moved up and down by the cylinders 14 a, 15 a, and 1-6 a, respectively, and the clamp jig 15 Needless to say, the anti-back 16 can be moved back and forth in the radial direction of the thin metal pipe P by means such as a cylinder (not shown). Also, the anti-fitting 1_6 is not only a block shape as shown, but also a roll shape.
- the chuck device 1-2 of the pipe twisting unit 1-1 has a structure for gripping the straight portion on the other end side of the thin metal pipe P to be processed.
- a twisting of the pipe is necessary. As shown in the figure, a twisting of the pipe is not necessary. Therefore, the bending carriage apparatus 1 is not limited to the one provided with the pipe twisting unit 1-1 shown in the figure. D Select and use an appropriate tube according to the number of bending processes on one end of the thin metal tube P.
- the chuck apparatus 1— of the pipe twisting unit 1-1 is used.
- step 2 the straight pipe portion of the other end of the small-sized metal pipe P is chucked, and then the pipe twisting unit 1 _ 1 moves in the direction of the pipe axis so that one end of the small-diameter metal pipe P to be processed is a bending device 1 It is transferred to the bending position of 1.
- the small metal pipe P to be covered is held between the bending roller 1 _4 and the counter load 1 _6, and the small metal pipe P to be covered is clamped by the clamp jig 1-5. Then, while holding the pipe in a substantially circular shape, the clamping jig 1_5 presses the processed small-diameter metal pipe P against the peripheral surface of the bending roller 1_4, and this processed small-diameter metal pipe A bending process is performed by rotating a predetermined angle on the surface via P.
- a bending radius R and an inner diameter flatness Pr of one end side of the thin metal pipe P to be processed are not more than 2.7 times the outer diameter H and the inner diameter flatness Pr is preferably 9% or less (preferably 7% or less, more preferably 5 % Or less) bend P-1 is applied.
- the bending roller 14 can be used to reduce the diameter of the workpiece. It is also possible to flatten the pipe body in the vertical direction while the metal pipe P is held, and to perform bending work in the flattened state.
- the straightening mold is composed of a pair of lower mold and upper mold, and the upper and lower molds are provided with grooves according to the bending shape.
- Fig. 4 shows an example of the straightening die, which consists of a lower die 2A and an upper die 2B provided with semicircular grooves 2A_1 and 2B-2 corresponding to the bending of the thin metal pipe P to be processed.
- the upper and lower molds are fixed to a press die set or the like and mounted on a press machine. To do.
- This straightening type is a total type with an R groove or a simple flat type without an R groove, depending on the size (outer diameter, inner diameter), material, hardness, crushing condition, etc. Select an appropriate correction allowance (pressurization displacement) to improve the flatness (collapse) of the inner surface of the tube.
- the bending part may be corrected every time the bending process is performed, or each bending part may be corrected after the entire process is completed.
- correction may be further made from the direction perpendicular to the bending plane.
- this bending caulking method is a pre-process of the bending apparatus for the thin metal pipe P to be processed, and the bending processing position is set based on the bending data.
- the metal tube is moved by an NC device, and the work-processed small-diameter metal tube P is preliminarily flattened so that the long axis of the flat portion is parallel to the bending plane by a pressing device that can control the pressing force (crushing force). .
- FIGS. 5 to 6 illustrate an apparatus that presses the thin metal pipe P to be covered with a flat mold.
- the pressing surface is placed on the upper surface of the lower mold 3A of the flat surface.
- the small metal pipe P to be processed is placed (FIG. 5), and the small metal pipe P to be pressed is flattened by the upper die 3B having a flat pressing surface (FIG. 6).
- the lower mold 3A and the upper mold 3B are separated from each other, and both molds are moved in the tube axis direction and pressed again to flatten the thin metal pipe P to be covered (mold Side moving method), or with the lower die 3A and upper die 3B spaced apart, move the thin metal pipe P to be processed and press the lower die 3A and upper die 3B again to flatten them (tube) It is also possible to adopt a method of moving the side).
- Figs. 7 to 8 exemplify a device that presses the thin metal pipe P to be covered with an arc-shaped groove mold.
- the pressing surface is the upper surface of the lower die 4A of the arc surface.
- the small metal pipe P to be processed is placed on (Fig. 7), and the small metal pipe P to be pressed is pressed and flattened by the upper die 4B whose pressure surface is also an arcuate surface ( Figure 8).
- Figs. 9 to 10 illustrate an apparatus for pressing the thin metal pipe P to be covered with a roll having a semicircular groove.
- the thin metal pipe P to be processed is placed on the lower mold roll 5A.
- the lower mold roll 5A and the upper mold roll 5B are rolled in the pipe axis direction to be flattened or covered.
- the thin metal pipe P to be processed is flattened by moving the small metal pipe P side in the direction of the pipe axis.
- the bending method, bending R, pipe outer diameter and pipe inner diameter of the thin metal pipe P to be processed Since the flatness varies depending on the bending angle, etc., it is possible to respond by pressing the servo (hydraulic width) or pressing force in consideration of these, or by hydraulic control. In addition, a flat position (crushing position) that has the ability to crush the minimum necessary for NC control will be adopted. Furthermore, when it is necessary to perform continuous bending with a single thin metal pipe to be processed, an apparatus incorporating an NC unit that can store and calculate the twist angle for each bending point can be used. However, if the shape cannot be bent by the NC-bender device, use another bending device or hand bending.
- FIG. 11 shows an example of an apparatus using a bending apparatus for a thin metal tube and a press flattening apparatus according to the present invention.
- the bending apparatus shown in Fig. 2 and the apparatus shown in Fig. 5 are shown.
- a case where a pressing device is used will be described as an example.
- the straight pipe portion of the other end of the thin metal pipe P to be processed is chucked by the chuck device 6-2 of the pipe twisting unit 6-1 of the press flattening device 6 and then the pipe twisting unit 6 — 1 moves in the direction of the tube axis and one end of the small metal pipe P to be processed is transferred to the pressing position of the pressing device 6-3, and then the pressing surface of the pressing device (crushing device) 6-3 is flat.
- the covered thin metal pipe P is pressed by the lower mold 3A and the upper mold 3B to be processed into a flat shape.
- the flat processed thin metal pipe P is transferred to the adjacent bending apparatus 1 and subjected to a predetermined bending force.
- the small metal pipe to be processed set in the lower mold (flat type, arc groove type, roll type) or upper type (flat type, arc groove type, roll type) described above is the upper mold (flat type). Die, arc groove type, roll type) or sudden crushing directly with the lower type (flat type, arc groove type, roll type) will cause damage to the tube first. R corners and chamfered corners that contact the body Apply.
- the crushed part (flattened part) of the thin metal pipe P to be covered is clamped to the bending apparatus, and draw bending or compression bending is performed. The bending force is then applied, and the bent part is crushed from the major axis direction of the flat part so that the flatness of the bent part is preferably 7% or less, more preferably 5% or less.
- a bending cartridge is filled with a medium in advance and subjected to bending calorie, and the bending medium is removed after the bending force is checked.
- the bending method will be described. This method uses various media (as a core material during bending) in the pipe before bending the thin metal pipe P to be covered with an NC bender. By enclosing, inserting, filling, sealing if necessary, applying a bending force, and then discharging and removing the medium out of the tube. is there.
- the medium When a liquid such as water or oil is used as the medium, the medium is preferably filled and sealed in the pipe at a high pressure, and after bending force is applied in that state, the seal is opened and the pipe is opened. Eject to 'remove'.
- thermoplastic resin such as PP (polypropylene)
- PP polypropylene
- the liquid medium may have a property of fixing, solidifying, and solidifying.
- liquid is different from gas and is basically an incompressible fluid (for example, the general compressibility of hydraulic fluid is approximately 1% contraction at 3000 kg / cm 2 ). Therefore, it is possible to simultaneously apply autofrettage processing to the inner peripheral surface by enclosing a liquid, preferably at a high pressure, and performing a bending force test. The reason is that the inner circumferential cross section of the pipe is flattened by the bending cage, and at the same time, the cross sectional area is decreased, and the internal volume is decreased, resulting in an increase in the internal pressure.
- the high-pressure fuel injection pipe having a bent portion according to the present invention can be applied to various high-pressure small-diameter metal pipes other than the high-pressure fuel injection pipe used in the accumulator fuel injection system using a common rail of a diesel engine.
- the manufacturing method and apparatus are applied to various bending equipment called power vendors and NC vendors that automatically perform various bending processes, and various thin metal pipes with high-quality bending sections. Can greatly contribute to the provision of Brief Description of Drawings
- FIG. 1 is an explanatory view showing a high-pressure fuel injection pipe having a bent portion according to the present invention, wherein (a) is an explanatory view showing a cross-sectional shape (perfect circle) of the high-pressure fuel injection pipe; Is the same as above It is a top view which shows a curling process part.
- FIG. 2 Schematic view showing an embodiment of a thin metal pipe bending / caching apparatus according to the present invention
- (a) is a plan view before bending a thin metal pipe to be processed
- (b) is a bending A front view showing a roller and a clamp jig
- (c) is a front view showing a block-shaped reaction force receiver.
- Fig. 2 is a diagram equivalent to Fig. 2 showing the state during bending of a thin metal pipe to be covered by the above apparatus, (a) is a plan view, (b) is a front view showing a bending roller and a clamping jig. FIG. 3C is a front view showing a block-shaped reaction force receiver.
- FIG. 4 A schematic perspective view showing an example of a correction mold for a bent portion of a thin metal pipe to be covered.
- FIG. 5 is a schematic explanatory view showing an example of a method of flattening by pressing a bent portion of a thin metal pipe to be processed with a flat mold, (a) is a side view showing a state before pressing, and (b) is a side view. It is a vertical side view same as the above. 6]
- FIG. 5 is a schematic explanatory view of the flattening method shown in FIG. 5, in which (a) is a side view showing a state after the pressing, and (b) is a vertical side view of the same.
- a schematic explanatory view showing an example of a method for flattening by pressing a bent portion of a thin metal pipe to be processed with an arc-shaped groove mold (a) is a side view showing a state before pressing, (b) Is a longitudinal front view of the same as above.
- FIG. 8 is a schematic explanatory view of the flattening method shown in FIG. 7, where (a) is a side view showing the state after the pressing, and (b) is a vertical side view of the same.
- FIG. 10 is a schematic explanatory view of the flattening method shown in FIG. 9, in which (a) is a side view showing a state immediately after the pressing, and (b) is a vertical side view of the same.
- FIG. 11 is a schematic view showing an example of an apparatus using a thin metal pipe bending apparatus and a flattening apparatus (crushing apparatus) according to the present invention.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-362068 | 2004-12-14 | ||
JP2004362068A JP4518932B2 (ja) | 2004-12-14 | 2004-12-14 | 曲げ部を有する高圧用燃料噴射管とその曲げ加工方法およびその装置 |
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WO2006064802A1 true WO2006064802A1 (ja) | 2006-06-22 |
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PCT/JP2005/022877 WO2006064802A1 (ja) | 2004-12-14 | 2005-12-13 | 曲げ部を有する高圧用燃料噴射管とその曲げ加工方法およびその装置 |
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JP (1) | JP4518932B2 (ja) |
WO (1) | WO2006064802A1 (ja) |
Families Citing this family (6)
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JP4849469B2 (ja) * | 2006-03-14 | 2012-01-11 | 臼井国際産業株式会社 | 接続頭部と曲げ部を有する高圧用燃料噴射管の製造方法 |
JP2011009266A (ja) * | 2009-06-23 | 2011-01-13 | Sansha Electric Mfg Co Ltd | ヒートシンク、及びヒートシンクの製造方法 |
JP5530802B2 (ja) * | 2010-05-13 | 2014-06-25 | 三桜工業株式会社 | パイプの曲げ加工装置 |
BR112012028634B1 (pt) * | 2010-05-14 | 2020-10-27 | Sanoh Industrial Co., Ltd. | dispositivo para dobrar tubos |
JP6818269B2 (ja) * | 2015-07-01 | 2021-01-20 | 公立大学法人奈良県立医科大学 | 体内埋込型カテーテルポート、および、体内埋込型カテーテルポートの製造方法 |
KR102213539B1 (ko) * | 2019-06-11 | 2021-02-05 | 정여균 | 파이프 절곡 장치 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6216821A (ja) * | 1985-07-12 | 1987-01-26 | Mitsubishi Heavy Ind Ltd | パネルチユ−ブの曲げ加工方法 |
JPH0246926A (ja) * | 1988-08-03 | 1990-02-16 | Susumu Kanashige | 金属螺旋巻き管の製造方法及びその製造装置 |
JPH07266837A (ja) * | 1994-03-29 | 1995-10-17 | Horikiri Bane Seisakusho:Kk | 中空スタビライザの製造法 |
JPH08141658A (ja) * | 1994-11-16 | 1996-06-04 | Sanetsu:Kk | 塩化ビニル鋼管の曲げ方法 |
JPH1015620A (ja) * | 1996-07-03 | 1998-01-20 | Babcock Hitachi Kk | 薄肉管曲げ装置 |
JPH1018937A (ja) * | 1996-06-28 | 1998-01-20 | Nissan Motor Co Ltd | V型エンジンの燃料分配管 |
JP2003164918A (ja) * | 2001-11-28 | 2003-06-10 | Dai Ichi High Frequency Co Ltd | 金属管の曲げ加工方法及び装置 |
-
2004
- 2004-12-14 JP JP2004362068A patent/JP4518932B2/ja not_active Expired - Fee Related
-
2005
- 2005-12-13 WO PCT/JP2005/022877 patent/WO2006064802A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6216821A (ja) * | 1985-07-12 | 1987-01-26 | Mitsubishi Heavy Ind Ltd | パネルチユ−ブの曲げ加工方法 |
JPH0246926A (ja) * | 1988-08-03 | 1990-02-16 | Susumu Kanashige | 金属螺旋巻き管の製造方法及びその製造装置 |
JPH07266837A (ja) * | 1994-03-29 | 1995-10-17 | Horikiri Bane Seisakusho:Kk | 中空スタビライザの製造法 |
JPH08141658A (ja) * | 1994-11-16 | 1996-06-04 | Sanetsu:Kk | 塩化ビニル鋼管の曲げ方法 |
JPH1018937A (ja) * | 1996-06-28 | 1998-01-20 | Nissan Motor Co Ltd | V型エンジンの燃料分配管 |
JPH1015620A (ja) * | 1996-07-03 | 1998-01-20 | Babcock Hitachi Kk | 薄肉管曲げ装置 |
JP2003164918A (ja) * | 2001-11-28 | 2003-06-10 | Dai Ichi High Frequency Co Ltd | 金属管の曲げ加工方法及び装置 |
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JP2006170031A (ja) | 2006-06-29 |
JP4518932B2 (ja) | 2010-08-04 |
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