CN108772481B - A method of rolling wave forming of double-flared conduit - Google Patents
A method of rolling wave forming of double-flared conduit Download PDFInfo
- Publication number
- CN108772481B CN108772481B CN201810683768.1A CN201810683768A CN108772481B CN 108772481 B CN108772481 B CN 108772481B CN 201810683768 A CN201810683768 A CN 201810683768A CN 108772481 B CN108772481 B CN 108772481B
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- Prior art keywords
- die
- flaring
- rolling wave
- conical surface
- male die
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Classifications
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- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
- B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
-
- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
- B21D19/10—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws working inwardly
-
- 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
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
- B21D41/021—Enlarging by means of tube-flaring hand tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The application discloses a rolling wave forming method of a double-flaring catheter, which comprises a rolling wave die, an inversion die and a flaring die; the rolling wave mould comprises a rolling wave clamping mould and a rolling wave male mould; the inversion die comprises an inversion male die and a flaring clamping die; the flaring die comprises a flaring clamping die and a flaring male die; the rolling wave clamping die is provided with an inner hole matched with the outer diameter of the catheter, the right end of the inner hole is provided with a flaring zone, the flaring zone is a conical surface groove annularly distributed in the inner hole, and the conical surface groove is two opposite conical surfaces: an upper conical surface and a lower conical surface; a retainer ring is fixedly arranged on the right end face of the rolling wave clamping die, and the retainer ring is provided with a through hole with the diameter smaller than that of the guide pipe; the front end of the rolling wave male die is provided with an annular conical surface bulge corresponding to the conical surface groove of the rolling wave clamping die. The application has the following advantages: the forming surface has high smoothness, small polishing strength, small thickness change of the guide pipe, strong sealing performance and improved efficiency; the forming deformation is small, the internal stress of the product is small, and the reliability is high.
Description
Technical Field
The application belongs to the technical field of catheter processing, and particularly relates to the technical field of flaring connection of catheters.
Background
The conduit is a key part of a large range in an aircraft, and the safety and reliability of a pipeline system directly affect the overall performance and safety of the aircraft, and the safety and safety are closely related to the form and connection performance of a pipe joint. In recent years, in order to further improve the performance of aircraft, liquid-cooled piping systems have been added. The liquid cooling function of the pipeline system requires that the pipe joint of the pipeline system must meet the strict sealing requirement, otherwise, the meaning of liquid cooling is lost, and the traditional single-flaring connection has serious leakage, and cannot meet the requirement of airplane development. In order to solve the problem of leakage and drop, and not to change the existing structure of the airplane conduit, a double-flaring connection mode is provided, which requires that the conduit flaring section be in a double-layer form. The current double-flaring forming process mainly adopts a method similar to stamping flaring, namely blanking, straightening, flaring, forming I, and forming I, as shown in figure 1. However, in the process of forming I, the outer surface of the guide pipe rubs with the die to enable the roughness of the outer surface to be too large, and the surface is a matching surface connected with the pipe joint after the forming I, so that polishing treatment is needed before connection, if the roughness is too large, the polishing treatment time is too long, even grinding is needed, the thickness of the guide pipe at the matching section is reduced, the size precision of the double flaring is reduced, and the service time of the double flaring guide pipe is reduced, and even the double flaring guide pipe cannot be used. In addition, the forming force required for forming the first type is large, the large-diameter catheter is easy to be unstable, the force transmission area is easy to radially shrink, the caliber of the catheter is reduced, and the assembly of the catheter and the flow of fluid in the catheter are affected.
Disclosure of Invention
In order to solve the problems of poor surface quality of an assembly surface, too large thickness reduction of the double-flaring and the like in the traditional forming method of the double-flaring of the large-diameter conduit, the application provides a method for forming the double-flaring of the large-diameter conduit, which has good forming quality and reduced thickness reduction.
The application provides a die for roll-wave forming of a double-flaring catheter, which comprises a roll-wave die, an inversion die and a flaring die; the rolling wave mould comprises a rolling wave clamping mould and a rolling wave male mould; the inversion die comprises an inversion male die and a flaring clamping die; the flaring die comprises a flaring clamping die and a flaring male die; the rolling wave clamping die is provided with an inner hole matched with the outer diameter of the catheter, the right end of the inner hole is provided with a flaring zone, the flaring zone is a conical surface groove annularly distributed in the inner hole, and the conical surface groove is two opposite conical surfaces: an upper conical surface and a lower conical surface; a retainer ring is fixedly arranged on the right end face of the rolling wave clamping die, and the retainer ring is provided with a through hole with the diameter smaller than that of the guide pipe; the front end of the rolling wave male die is provided with an annular conical surface bulge corresponding to the conical surface groove of the rolling wave clamping die.
The shape of the conical surface of the rolling wave male die is consistent with that of the conical surface of the rolling wave clamping die, the size of the rolling wave male die is smaller than that of the rolling wave clamping die, and the maximum diameter of the rolling wave male die is smaller than the inner diameter of the guide pipe.
The middle part of the rolling wave male die is provided with a raised step, and the step is contacted with the end face of the retainer ring.
An inner hole matched with the outer diameter of the catheter is formed in the left end of the flaring clamping die of the inversion die, and a flat nozzle is arranged at the right end of the flaring clamping die; the flat pipe nozzle comprises a straight wall section and a flaring section, wherein the inner diameter of the straight wall section is equal to the outer diameter of the catheter, and the flaring section is an enlarged conical surface; one end of the inward turning male die is conical, and the included angle between the conical surface and the upper conical surface is smaller than 90 degrees.
The flaring clamping die of the flaring die is the same as that of the inversion die, the left end of the flaring male die is conical, and the conical half cone angle is the inner half cone angle of the flaring of the forming conduit.
The half cone angle of the lower cone surface and the upper cone surface is determined by the eccentric amount of the rolling wave male die, the sine value of the half cone angle of the upper cone surface is equal to the ratio of the eccentric amount to the theoretical length of the upper cone section, and the sine value of the half cone angle of the lower cone surface is equal to the ratio of the eccentric amount to the theoretical length of the lower cone section.
The half cone angle of the flaring male die is 37 degrees.
The application provides a double-flaring catheter roll forming method, which comprises the following steps:
a) A rolling wave procedure, namely inserting a conduit processing section into a rolling wave clamping die, closing the clamping die to clamp the pipe blank, radially feeding the rolling wave male die to a required eccentric amount to enable the pipe blank to be locally and convexly deformed, and eccentrically rotating the rolling wave male die around the central line of the rolling wave clamping die and automatically rotating around the central line of the rolling wave male die under the action of friction force;
b) An inversion procedure, namely loading the intermediate tube blank formed in the step S1 into a flaring clamping die, and installing a flat tube nozzle into the flaring clamping die, so that the flaring clamping die simultaneously clamps the flat tube nozzle and the intermediate tube blank, and an inversion male die actively rotates and axially feeds to enable the upper conical surface of the guide tube to be inverted;
c) And a flaring procedure, namely, maintaining a flaring clamping die and a middle tube blank, replacing an inward turning male die with a flaring male die, actively rotating the flaring male die, and axially feeding the flaring male die to a conduit for flaring forming.
The feeding amount S1 of the inversion male die in the step b) is as follows:
（1）
wherein:
s1: spinning the inner turning down pressure;
L up : the length of the upper cone end;
alpha: the half cone angle of the upper cone end;
θ: and spinning the half cone angle of the inversion male die.
The application has the following advantages: the forming surface has high smoothness, small polishing strength, small thickness change of the guide pipe, strong sealing performance and improved efficiency; the forming deformation is small, the internal stress of the product is small, and the reliability is high.
Drawings
FIG. 1 is a prior art double flare catheter forming process;
FIG. 2 is a schematic view of a roll wave;
FIG. 3 is an inside-out schematic view;
FIG. 4 is a schematic diagram of flaring;
FIG. 5 is a schematic diagram of spin flare forming;
fig. 6 is a schematic diagram of the distance on the horizontal line of the catheter.
The marks in the figure:
1. roll wave clamping die 2, roll wave male die 3, flat nozzle 4 and conduit
5. Retainer ring 6, flaring clamping die 7, inward turning male die
9. The flaring male die 11 has an upper conical surface 12 and a lower conical surface.
The specific embodiment is as follows:
example 1
The application relates to a die for roll-wave forming of a double-flaring catheter, which comprises a roll-wave die, an inversion die and a flaring die; the roll wave die comprises a roll wave clamping die 1 and a roll wave male die 2; the inversion die comprises an inversion male die 7 and a flaring clamping die 6; the flaring die comprises a flaring clamping die 6 and a flaring male die 9; the rolling wave clamping die 1 is provided with an inner hole matched with the outer diameter of the guide pipe 4, the right end of the inner hole is provided with a flaring zone, the flaring zone is a conical surface groove annularly distributed in the inner hole, and the conical surface groove is two opposite conical surfaces: an upper tapered surface 11 and a lower tapered surface 12; a retainer ring 5 is fixedly arranged on the right end face of the rolling wave clamping die 1, and the retainer ring 5 is provided with a through hole with the diameter smaller than that of the guide pipe; the front end of the rolling wave male die 2 is provided with an annular conical surface bulge corresponding to the conical surface groove of the rolling wave clamping die 1.
The shape of the conical surface of the rolling wave male die 2 is consistent with that of the rolling wave clamp 1, the size of the rolling wave male die 2 is smaller than that of the rolling wave clamp 1, and the maximum diameter of the rolling wave male die 2 is smaller than the inner diameter of the guide pipe.
Example 2
According to the die for rolling wave forming of the double-flaring catheter, the front end of the rolling wave male die 2 is provided with the annular conical surface bulge corresponding to the conical surface groove of the rolling wave clamping die 1, the middle part of the rolling wave male die 2 is provided with the raised step, the conical surface shape of the rolling wave male die is consistent with that of the rolling wave clamping die 1, the size of the rolling wave male die 2 is smaller than that of the rolling wave clamping die 1, the maximum diameter of the rolling wave male die 2 is smaller than the inner diameter of the catheter, and the step is contacted with the end face of the retainer ring 5 during rolling wave forming.
Example 3
The application relates to a die for roll-wave forming of a double-flaring catheter, which comprises a roll-wave die, an inversion die and a flaring die; the roll wave die comprises a roll wave clamping die 1 and a roll wave male die 2; the flaring die comprises a flaring clamping die 6 and a flaring male die 9; the inversion die comprises an inversion male die 7 and a flaring clamping die 6; the left end of the flaring clamping die 1 of the inversion die is provided with an inner hole matched with the outer diameter of the guide pipe 4, and the right end of the flaring clamping die 6 is provided with a flat pipe nozzle 3; the flat nozzle 3 comprises a straight wall section and a flaring section, the inner diameter of the straight wall section is equal to the outer diameter of the catheter, and the flaring section is an enlarged conical surface; one end of the inversion male die 7 is conical, and the included angle between the conical surface and the upper conical surface is smaller than 90 degrees.
Example 4
The application relates to a die for roll-wave forming of a double-flaring catheter, which comprises a roll-wave die, an inversion die and a flaring die; the roll wave die comprises a roll wave clamping die 1 and a roll wave male die 2; the inversion die comprises an inversion male die 7 and a flaring clamping die 6; the flaring die comprises a flaring clamping die 6 and a flaring male die 9; the flaring clamping die of the flaring die is the same as that of the inversion die, the left end of the flaring male die 9 is conical, and the conical half cone angle is the inner half cone angle of the flaring of the forming conduit.
Example 5
The embodiment is a double-flaring catheter roll forming method, as shown in fig. 2 to 6, the pipe fitting is a 5A02 aluminum alloy pipe, the diameter is 34mm, and the wall thickness is 1mm. The outer half cone angle of the flaring zone is 33 degrees, the inner layer is 37 degrees, the diameter of the maximum diameter expansion part is 44mm, and the radius of the excessive fillet between the force transfer zone and the flaring zone is 1mm.
The double-flaring forming mechanism used in the embodiment comprises a rolling wave clamping die 1, a rolling wave male die 2, an inversion male die 7, a flaring clamping die 6, a flaring male die 9, a flat pipe mouth 3, a retainer ring 5 and the like. The rolling wave clamping die 1 is a female die in rolling wave forming, and the rolling wave clamping die 1 is provided with two threaded holes for fixing the retainer ring 5 on the rolling wave clamping die 1. The flaring clamping die 6 is also a clamping die in the process of inversion. The internal turning male die 7 and the flaring male die 9 are both double-edged. The flat pipe nozzle 3 is a female die which turns inwards and flares. The cone angle of the turned-in male die is 140 degrees, and the cone angle of the flaring male die is 74 degrees.
The technological process for forming large-diameter double-flaring catheter includes three steps: the first step is a rolling wave process, the second step is an inversion process, and the third step is a flaring process. Wherein:
the first step is a roll forming process. In this step, the flat nozzle 3 is first sleeved outside the initial tube 4 blank, the flat nozzle 3 cannot be located in the rolling wave forming section of the tube blank, then the pipe processing section is inserted into the rolling wave clamping die 1, the tube blank is clamped, the rolling wave male die 2 is first radially fed to a required eccentric amount (the difference of the inner diameter of the straight wall section of the tube blank minus the outer diameter of the straight wall section of the rolling wave male die divided by 2) to enable the tube blank to locally and convexly deform, and then the rolling wave male die 2 eccentrically rotates around the central line of the rolling wave clamping die and passively rotates around the central line under the action of friction force. During the roll wave, the free section of the catheter is kept from bending downwards under the action of self gravity.
The second step is a spinning inversion forming process. The procedure is to load the intermediate blank 8 formed in the first step into a flaring clamping die and move the flat nozzle 3 to the blank forming section so that the flaring clamping die 6 clamps both the flat nozzle 3 and the intermediate blank 8. During processing, the inverted male die 7 actively rotates and axially feeds S, and the rotating speed of the male die is 200r/min.
（1）
Wherein:
s1: spinning the inner turning down pressure;
L up : the length of the upper cone end;
alpha: the half cone angle of the upper cone end;
θ: and spinning the half cone angle of the inversion male die.
The third step is a spinning flaring forming process. The procedure is to detach the inverted male die 7 in the first procedure and mount the flaring male die 9, and the processing method is similar to that of the second procedure, and the male die actively rotates (the rotating speed of the male die is 200 r/min) and axially feeds (S-L) mm, L is the vertical distance between the tip of the male die and the top end of the flat nozzle for the third time before the pressing down (which can be obtained through actual measurement), S is the distance between the tip of the male die and the top end of the flat nozzle when the pressing down is completed (the ideal state means that the wall thickness of the flaring of the inner layer and the outer layer is 1 mm), as shown in fig. 5.
The tip of the flat nozzle was taken as a horizontal straight line, and the reference standard for the length of this straight line was known as 21.5mm. As shown in FIG. 6, after the completion of the pressing, the distance of the duct portion on the horizontal line is 21.5-L', which is also (t.sup.37.+ -. T.sup.33.+ -. Sin.) (t is the duct wall thickness, ignoring the value of the intermediate slit).
Taking t=1 mm according to the assumption,
21.5-L’＝(t÷sin37°+t÷sin33°)
l '=21.5-3.5=18 mm, s=l' +=23.88 mm, and the amount of depression is 23.88mm-L, where L takes a negative value when the punch tip is located above the flat nozzle.
Claims (2)
1. The double-flaring catheter roll wave forming method is realized based on a die for double-flaring catheter roll wave forming, wherein the die for double-flaring catheter roll wave forming comprises a roll wave die, an inversion die and a flaring die; the rolling wave mould comprises a rolling wave clamping mould and a rolling wave male mould; the inversion die comprises an inversion male die and a flaring clamping die; the flaring die comprises a flaring clamping die and a flaring male die; the rolling wave clamping die is provided with an inner hole matched with the outer diameter of the catheter, the right end of the inner hole is provided with a flaring zone, the flaring zone is a conical surface groove annularly distributed in the inner hole, and the conical surface groove is two opposite conical surfaces: an upper conical surface and a lower conical surface; a retainer ring is fixedly arranged on the right end face of the rolling wave clamping die, and the retainer ring is provided with a through hole with the diameter smaller than that of the guide pipe; the front end of the rolling wave male die is provided with an annular conical surface bulge corresponding to the conical surface groove of the rolling wave clamping die; the shape of the conical surface of the rolling wave male die is consistent with that of the conical surface of the rolling wave clamping die, the size of the rolling wave male die is smaller than that of the rolling wave clamping die, and the maximum diameter of the rolling wave male die is smaller than the inner diameter of the guide pipe; the middle part of the rolling wave male die is provided with a raised step, and the step is contacted with the end face of the retainer ring; an inner hole matched with the outer diameter of the catheter is formed in the left end of the flaring clamping die of the inversion die, and a flat nozzle is arranged at the right end of the flaring clamping die; the flat pipe nozzle comprises a straight wall section and a flaring section, wherein the inner diameter of the straight wall section is equal to the outer diameter of the catheter, and the flaring section is an enlarged conical surface; one end of the inward turning male die is conical, and the included angle between the conical surface and the upper conical surface is smaller than 90 degrees; the flaring clamping die of the flaring die is the same as that of the inversion die, the left end of the flaring male die is conical, and the conical half cone angle is the inner half cone angle of the flaring of the forming conduit; the half cone angle of the lower cone surface and the upper cone surface is determined by the eccentric amount of the rolling wave male die, the sine value of the half cone angle of the upper cone surface is equal to the ratio of the eccentric amount to the theoretical length of the upper cone section, and the sine value of the half cone angle of the lower cone surface is equal to the ratio of the eccentric amount to the theoretical length of the lower cone section; the half cone angle of the flaring male die is 37 degrees;
the method is characterized by comprising the following steps of:
a) A rolling wave procedure, namely inserting a conduit processing section into a rolling wave clamping die, closing the clamping die to clamp the pipe blank, radially feeding the rolling wave male die to a required eccentric amount to enable the pipe blank to be locally and convexly deformed, and eccentrically rotating the rolling wave male die around the central line of the rolling wave clamping die and automatically rotating around the central line of the rolling wave male die under the action of friction force;
b) An inversion procedure, namely loading the intermediate tube blank formed in the step S1 into a flaring clamping die, and installing a flat tube nozzle into the flaring clamping die, so that the flaring clamping die simultaneously clamps the flat tube nozzle and the intermediate tube blank, and an inversion male die actively rotates and axially feeds to enable the upper conical surface of the guide tube to be inverted;
c) And a flaring procedure, namely, maintaining a flaring clamping die and a middle tube blank, replacing an inward turning male die with a flaring male die, actively rotating the flaring male die, and axially feeding the flaring male die to a conduit for flaring forming.
2. The dual flared catheter roll forming method of claim 1, wherein the feeding amount S1 of the inversion punch in step b) is:
（1）
wherein:
s1: spinning the inner turning down pressure;
L up : the length of the upper cone end;
alpha: the half cone angle of the upper cone end;
θ: and spinning the half cone angle of the inversion male die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810683768.1A CN108772481B (en) | 2018-06-28 | 2018-06-28 | A method of rolling wave forming of double-flared conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810683768.1A CN108772481B (en) | 2018-06-28 | 2018-06-28 | A method of rolling wave forming of double-flared conduit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108772481A CN108772481A (en) | 2018-11-09 |
| CN108772481B true CN108772481B (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810683768.1A Active CN108772481B (en) | 2018-06-28 | 2018-06-28 | A method of rolling wave forming of double-flared conduit |
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| Country | Link |
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| CN (1) | CN108772481B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109956A (en) * | 1993-11-26 | 1995-10-11 | 日本电装株式会社 | Manufacturing method of bulging pipe |
| JPH08112625A (en) * | 1994-10-12 | 1996-05-07 | Sanou Kogyo Kk | Device for forming end part of tube |
| JP2002195467A (en) * | 2000-12-26 | 2002-07-10 | Usui Internatl Ind Co Ltd | Connection structure of resin-coated metal tube |
| CN101156014A (en) * | 2005-02-16 | 2008-04-02 | 盖茨公司 | Flared cone fitting |
| CN101666402A (en) * | 2009-09-24 | 2010-03-10 | 四川成都成工工程机械股份有限公司 | Plane sealing structure of hydraulic tube and processing method |
| WO2013073588A1 (en) * | 2011-11-14 | 2013-05-23 | フタバ産業株式会社 | Tube end forming method |
| JP2016073986A (en) * | 2014-10-03 | 2016-05-12 | 新日鐵住金株式会社 | Manufacturing method and manufacturing apparatus for expanded diameter pipe parts |
| CN107695218A (en) * | 2017-08-30 | 2018-02-16 | 江西昌河航空工业有限公司 | A kind of pipe double-turnup building mortion and its method |
| CN208555686U (en) * | 2018-06-28 | 2019-03-01 | 成都飞机工业（集团）有限责任公司 | A kind of mold of double flaring conduit roll wave formings |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2593305C (en) * | 2007-07-11 | 2008-10-14 | Stanislav Ivanovitch Pliassounov | Flared brake tube connector |
| MX364975B (en) * | 2010-12-02 | 2019-05-16 | Victaulic Co Of America | Pipe element having shoulder, groove and bead and methods and apparatus for manufacture thereof. |
-
2018
- 2018-06-28 CN CN201810683768.1A patent/CN108772481B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109956A (en) * | 1993-11-26 | 1995-10-11 | 日本电装株式会社 | Manufacturing method of bulging pipe |
| JPH08112625A (en) * | 1994-10-12 | 1996-05-07 | Sanou Kogyo Kk | Device for forming end part of tube |
| JP2002195467A (en) * | 2000-12-26 | 2002-07-10 | Usui Internatl Ind Co Ltd | Connection structure of resin-coated metal tube |
| CN101156014A (en) * | 2005-02-16 | 2008-04-02 | 盖茨公司 | Flared cone fitting |
| CN101666402A (en) * | 2009-09-24 | 2010-03-10 | 四川成都成工工程机械股份有限公司 | Plane sealing structure of hydraulic tube and processing method |
| WO2013073588A1 (en) * | 2011-11-14 | 2013-05-23 | フタバ産業株式会社 | Tube end forming method |
| JP2016073986A (en) * | 2014-10-03 | 2016-05-12 | 新日鐵住金株式会社 | Manufacturing method and manufacturing apparatus for expanded diameter pipe parts |
| CN107695218A (en) * | 2017-08-30 | 2018-02-16 | 江西昌河航空工业有限公司 | A kind of pipe double-turnup building mortion and its method |
| CN208555686U (en) * | 2018-06-28 | 2019-03-01 | 成都飞机工业（集团）有限责任公司 | A kind of mold of double flaring conduit roll wave formings |
Non-Patent Citations (3)
| Title |
|---|
| 工艺参数对剪切旋压旋压力和壁厚差的影响;张晋辉;詹梅;杨合;徐银丽;马飞;;材料科学与工艺(02);39-42 * |
| 管件圆角模稳定内翻成形时应力与壁厚的解析;牛卫中;;上海交通大学学报(05);69-73 * |
| 高效对称式铝合金导管滚波加工工具及工艺装备;唐臣升;耿莽河;孙朝海;唐鹏;周建孝;;工具技术(09);84-89 * |
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| CN108772481A (en) | 2018-11-09 |
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