CN109175024A - A kind of processing method and bend pipe of bend pipe - Google Patents
A kind of processing method and bend pipe of bend pipe Download PDFInfo
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- CN109175024A CN109175024A CN201811284901.2A CN201811284901A CN109175024A CN 109175024 A CN109175024 A CN 109175024A CN 201811284901 A CN201811284901 A CN 201811284901A CN 109175024 A CN109175024 A CN 109175024A
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- curved
- bend pipe
- pipeline section
- processing sections
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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
- B21D7/00—Bending rods, profiles, or tubes
-
- 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
- B21D37/16—Heating or cooling
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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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/162—Heating equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The present invention provides the processing method and bend pipe of a kind of bend pipe, belongs to bend pipe processing technique field.It includes eccentric straight tube and induction heater, step includes: S1, eccentric straight tube is mounted in supporting table, upper mid-frequency induction heating circle is covered on processing sections to be curved, first pipeline section is movably mounted in guidance set, the end that the second pipeline section is blocked with preceding collet clamps the end of the first pipeline section with pusher angle coupling head, and the first pipeline section is pushed to move along the direction of processing sections to be curved；S2 is passed through electric current of intermediate frequency in mid-frequency induction heating circle, heats processing sections to be curved, when processing sections temperature to be curved is increased to mecystasis, first pipeline section is promoted with mechanical thrust, processing sections to be curved are bent, the processing sections to be curved bent out are cooling with coolant rapidly.The eccentric straight tube that the processing of the type bend pipe uses outer diameter to change, the bend pipe being processed into reduce medial thickness amount, alleviate the weight of pipe-line system.
Description
Technical field
The present invention relates to bend pipe processing technique field more particularly to the processing methods and bend pipe of a kind of bend pipe.
Background technique
Conventional pipelines are concentric pipe, and bend pipe post-tensioning face is thinned, and compressing surface thickens, and amount of swelling be greater than it is thinned
Amount, the medial thickness of minor radius pipeline are particularly evident.Consider that it is unnecessary that this part, which thickens, from design angle, and excessive
Can also pipe-line system be had some impact on by thickening.
Summary of the invention
One of the objects of the present invention is to provide a kind of processing method of bend pipe, the processing method of this bend pipe aims to solve the problem that existing
There is the problem of bend pipe post-tensioning face is thinned, compressing surface thickens in technology and amount of swelling is greater than Reducing thickness；
Another object of the present invention is to provide a kind of bend pipe, this bend pipe aims to solve the problem that bending method causes in the prior art
The problem of pipe-line system weight saving.
To achieve the above object, the technical scheme is that
A kind of processing method of bend pipe, including eccentric straight tube and induction heater, the bias straight tube includes being sequentially connected
The first pipeline section, processing sections to be curved and the second pipeline section, the induction heater includes preceding collet, pusher angle coupling head, guiding group
Part, mid-frequency induction heating circle, supporting table and driver, the driver and the pusher angle coupling head are sequentially connected, the drive
Dynamic device is for driving the pusher angle coupling head mobile；The step of processing method includes:
Step S1: it on the supporting table by the eccentric straight tube installation, is covered in described on the processing sections to be curved
First pipeline section is movably mounted in the guidance set by frequency induction heating circle, is blocked with the preceding collet described
The end of second pipeline section, the end of first pipeline section is clamped with the pusher angle coupling head, and pushes first pipeline section edge
The processing sections to be curved direction it is mobile；
Step S2: being passed through electric current of intermediate frequency in the mid-frequency induction heating circle, heats the processing sections to be curved, when it is described to
When curved processing sections temperature is increased to mecystasis, first pipeline section is promoted with mechanical thrust, to the processing sections to be curved into
Row is bent, and the processing sections to be curved bent out are cooling with coolant rapidly.
As a preferred technical solution of the present invention, the guidance set include motor, multiple lead screws and with it is multiple
Guide roller, the motor and multiple lead screws are rotatablely connected, and the lead screw is sequentially connected with guide roller is stated.
As a preferred technical solution of the present invention, the pipe of the pipe thickness of first pipeline section and second pipeline section
Wall thickness is identical.
As a preferred technical solution of the present invention, the processing sections to be curved have opposite the first side wall and second side
Wall, the pipe thickness of the first side wall are greater than the pipe thickness of the second sidewall, the pipe thickness of the second sidewall with
The pipe thickness of first pipeline section is identical.
As a preferred technical solution of the present invention, the junction of first pipeline section and the first side wall is first
The junction of changeover portion, second pipeline section and the first side wall is the second changeover portion, and the curvature of the First Transition section becomes
1:25 is turned to, the Curvature varying of second changeover portion is 1:25.
As a preferred technical solution of the present invention, the mid-frequency induction heating circle using with the processing to be curved
The oval induction coil that section is equipped with, the ellipse induction coil have opposite the first heated wall and the second heated wall, institute
The first heated wall to be stated to be set on the first side wall, second heated wall is set in the second sidewall, and described first
The thickness of heated wall is greater than the thickness of second heated wall.
As a preferred technical solution of the present invention, the difference of the major and minor axis of the ellipse induction coil is equal to described first
The difference of the pipe thickness of side wall and the second sidewall.
As a preferred technical solution of the present invention, the heating coil of the mid-frequency induction heating circle with a thickness of described
1.5~3 times of the pipe thickness of processing sections to be curved.
As a preferred technical solution of the present invention, the heating temperature range of the mid-frequency induction heating circle is 700~
800°。
A kind of bend pipe, the bend pipe are made by the processing method of above-described bend pipe.Beneficial effects of the present invention
It is:
The present invention provides a kind of processing method of bend pipe by above-mentioned design, and the processing method of the bend pipe includes eccentric straight tube
And induction heater, eccentric straight tube include sequentially connected first pipeline section, processing sections to be curved and the second pipeline section, induction heater
It is curved with pusher including preceding collet, pusher angle coupling head, guidance set, mid-frequency induction heating circle, supporting table and driver, driver
Collet transmission connection, driver is for driving pusher angle coupling head mobile；The step of processing method includes: step S1: will be eccentric straight
Pipe is mounted in supporting table, and upper mid-frequency induction heating circle is covered on processing sections to be curved, the first pipeline section is movably mounted at and is led
Into component, the end of the second pipeline section is blocked with preceding collet, clamps the end of the first pipeline section with pusher angle coupling head, and pushes the
One pipeline section is moved along the direction of processing sections to be curved；Step S2: being passed through electric current of intermediate frequency in mid-frequency induction heating circle, heats to be curved
Processing sections promote the first pipeline section with mechanical thrust, when processing sections temperature to be curved is increased to mecystasis to processing sections to be curved
It is bent, the processing sections to be curved bent out are cooling with coolant rapidly.Using medium frequency induction heater come to eccentric straight tube
Heating bending is carried out, i.e., straight tube is used for curved part and is processed into eccentric tubes, only thickens the straight tube outer arc for being used for bend pipe,
The amount of swelling that curved rear inner arc will be greatly reduced in this way, reduces pipe-line system weight；Such as in bend pipe normal using concentric pipe,
Not up to minimum 48mm it is curved after wall thickness, the raw material wall thickness of use is at least 58mm, it is curved after inner arc side wall thickness can thicken to
80mm；And after taking eccentric straight tube (becoming outer diameter) to bend, inside wall thickness can be reduced to 65mm；Simultaneously as variation only occurs in
Outer diameter ensure that the actual internal area of pipeline, highly beneficial for the flowing of pipeline interior media.The processing of this kind of processing method
Feature is: (one), the raw material straight tube used are different；The eccentric straight tube that the processing of the type bend pipe uses outer diameter to change, adds
Work at bend pipe reduce medial thickness amount, alleviate the weight of pipe-line system.(2), the tooling used is different.1. the bend pipe
The induction heater used is the induction heater of oval eccentric, between controlling between eccentric straight tube and induction heater
Gap controls its red tape width and heating temperature.2. the guide roller part used is different, due to outer diameter tube bias, pipe is pushed away
When entering curved changeover portion of start and end (First Transition section and the second changeover portion), it will cause the case where idler wheel comes to nothing, do not have guiding
Effect, therefore four guide rollers are by the way of individually adjusting, i.e., by the operating of the different lead screw of different motor controls,
And then the rotation of different guide rollers is driven respectively, it can guarantee that guide roller connects with the close of eccentric straight tube in overall process
Touching.3. improving intermediate frequency power supply.Load is made of induction coil and compensation capacitor, connects into antiresonant circuit；Using series connection
The intermediate frequency power supply of resonance, it is more efficient, it can effectively reduce inside and outside wall temperature difference, improve the thrust of bend pipe processing, reduce machining stress,
Improve structural homogenity.(3), the difference of working process parameter.Due to the curved point of start and end there are transitional region (First Transition section and
Second changeover portion), it is such as heated to normal return bend temperature (900-960 DEG C) and easily generates bulge, this can suitably be dropped in this section
Low return bend temperature, between 700~800 DEG C, the back segment in transition zone progressively increases to normally the return bend temperature that this section uses
Return bend temperature, and suitably adjust during bend pipe induction coil between bend pipe at a distance to control the uniformity of temperature；It rises curved
The fltting speed control of point (First Transition section) in 0.1mm/S, into eccentric segment (processing sections to be curved) after adjust to 0.1~
0.15mm/S；If the temperature of the second sidewall of processing sections to be curved is still higher during bend pipe, compressed air hose can be used
Supplement heat rejecter is carried out, i.e., compressed air hose is mounted in mid-frequency induction heating circle, is punched on compressed air hose, and
The second sidewall of processing sections to be curved can be cooled down by being passed through compressed air.
The present invention provides a kind of bend pipe by above-mentioned design, the bend pipe due to use above-mentioned processing method, knot
Structure is reasonable and using effect is good.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is induction heater provided in an embodiment of the present invention and eccentric straight tube attachment structure schematic diagram；
Fig. 2 is eccentric straight tube structure schematic diagram provided in an embodiment of the present invention；
Fig. 3 is the A-A diagrammatic cross-section of Fig. 2 provided in an embodiment of the present invention.
Fig. 4 is the B-B diagrammatic cross-section of Fig. 2 provided in an embodiment of the present invention；
Fig. 5 is the C-C diagrammatic cross-section of Fig. 2 provided in an embodiment of the present invention；
Fig. 6 is bend pipe structure schematic diagram provided in an embodiment of the present invention；
Fig. 7 is induction heater provided in an embodiment of the present invention and eccentric straight tube attachment structure schematic diagram；
Fig. 8 is the structural schematic diagram that oval induction coil provided in an embodiment of the present invention and eccentric straight tube are cooperatively connected.
Icon: 1- bias straight tube；2- induction heater；The first pipeline section of 3-；4- processing sections to be curved；The second pipeline section of 5-；Before 6-
Collet；7- pusher angle coupling head；8- guidance set；9- mid-frequency induction heating circle；10- the first side wall；11- second sidewall；12- first
Changeover portion；The second changeover portion of 13-；The first heated wall of 14-；The second heated wall of 15-.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention for usually describing and showing in attached drawing here is real
The component for applying example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term " on ", "lower" is base
In orientation or positional relationship shown in the drawings or the invention product using when the orientation or positional relationship usually put, only
It is that for the convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must have specifically
Orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, in the present invention unless specifically defined or limited otherwise, fisrt feature is on or below second feature
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature the
Right above two features and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature is in the second spy
Under sign, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of fisrt feature level
Height is less than second feature.
In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
Embodiment:
The present embodiment provides a kind of bend pipe, specific structure is as hereinbefore set forth.
Fig. 1 is please referred to, cooperation includes: referring to Fig. 2, the specific steps of the processing method of bend pipe
Step S1: eccentric straight tube 1 is mounted in supporting table, and upper mid-frequency induction heating circle 9 is covered on processing sections 4 to be curved,
First pipeline section 3 is movably mounted in guidance set 8, the end of the second pipeline section 5 is blocked with preceding collet 6, with pusher angle coupling
First 7 clamp the end of the first pipeline section 3, and the first pipeline section 3 is pushed to move along the direction of processing sections 4 to be curved；
Step S2: being passed through electric current of intermediate frequency in mid-frequency induction heating circle 9, heats processing sections 4 to be curved, when processing sections 4 to be curved
When temperature is increased to mecystasis, the first pipeline section 3 is promoted with mechanical thrust, processing sections 4 to be curved are bent, will be bent out
Processing sections to be curved 4 it is cooling with coolant rapidly.
Referring to figure 2., referring to Fig. 3 to Fig. 5, eccentric straight tube 1 includes sequentially connected first pipeline section 3, processing to be curved for cooperation
Section 4 and the second pipeline section 5, induction heater 2 include preceding collet 6, pusher angle coupling head 7, guidance set 8, mid-frequency induction heating circle
9, supporting table and driver, driver and pusher angle coupling head 7 are sequentially connected, and driver is for driving pusher angle coupling head 7 mobile；
Guidance set 8 include motor, multiple lead screws and with multiple guide rollers, motor and multiple lead screws are rotatablely connected, lead screw with state
Guide roller transmission connection.
Due to outer diameter tube bias, pipe is advanced to curved changeover portion of start and end (First Transition section 12 and the second changeover portion 13)
When, it will cause the case where idler wheel comes to nothing, do not have a guiding role, therefore four guide rollers are by the way of individually adjusting, i.e.,
By the operating of the different lead screw of different motor controls, and then the rotation of different guide rollers is driven respectively, can guarantee
The close contact of guide roller and eccentric straight tube 1 in overall process.
It should be noted that in the present embodiment, driver can be using actuators such as hydraulic cylinder or motors, can also be with
Using other drive mechanisms.
Referring to figure 3., referring to Fig. 5, the pipe thickness of the first pipeline section 3 is identical as the pipe thickness of the second pipeline section 5 for cooperation.
Referring to figure 4., referring to Fig.1, processing sections 4 to be curved have opposite the first side wall 10 and second sidewall 11 for cooperation, the
The pipe thickness of one side wall 10 is greater than the pipe thickness of second sidewall 11, the pipe thickness of second sidewall 11 and the first pipeline section 3
Pipe thickness is identical.
By taking the nominal size of pipeline is the pipe of 1067*52 as an example, the internal diameter of standard pipeline is 963mm, forms bend pipe
In the process, the trommel of the extrados of the Extrude Face i.e. bend pipe of bend pipe, since the pipe thickness of standard is not less than 48mm,
It therefore, is the minimum wall thickness (MINI W.) for meeting 48mm, pipe outer arc, which will reach 58mm, can just meet the requirements.If being made into eccentric pipe, as long as
Meet extrados and reach 58mm, although and intrados can thicken, it is a certain amount of thicken by Mechanics Calculation be it is beneficial,
So the wall thickness of intrados is 52mm.Therefore, the outer diameter of a circle of processing sections 4 to be curved is 58+52+963=1073mm, therefore,
Its center of circle can reach such effect to inclined 3mm at the first side wall 10.
The manufacturing process of eccentric straight tube 1 as a result, are as follows:
Shell is integrally accomplished to 60mm thickness first, first by pipe entirety Vehicle Processing to 58mm, then adjusts the rotation of workpiece
Turn the inclined 3mm in center, pipe vehicle or boring (processing sections 4 i.e. to be curved) be machined to it is whole it is eccentric (wall thickness of the first side wall 10 is 58mm,
The wall thickness of second sidewall 11 is 52mm), rotating center is adjusted again by the first pipeline section 3 and the second pipeline section 5 is machined to tube wall
Thickness is the concentric pipe of 52mm.
Referring to figure 2., the junction of cooperation reference Fig. 4, the first pipeline section 3 and the first side wall 10 is First Transition section 12, the
The junction of two pipeline sections 5 and the first side wall 10 is the second changeover portion 13, and the ratio of slope of First Transition section 12 is 1:25, the second transition
The ratio of slope of section 13 is 1:25.This kind of structure not will form apparent variable diameter so that the intensity of eccentric straight tube 1 is higher；Meanwhile
The quality of obtained bend pipe more preferably, meets the needs of pipe-line system.
Referring to figure 5., cooperation is referring to Fig. 2, and when this eccentric straight tube 1 is formed bend pipe, to be curved by eccentric straight tube 1 adds
Workshop section 4 is bent by the first side wall 10 towards the direction of second sidewall 11, and when forming bend pipe, the first side wall 10 is the outside of bend pipe
Face, second sidewall 11 are the medial surface of bend pipe, and the lateral surface of bend pipe stretches, medial surface compression, due to the tube wall of the first side wall 10
Thickness b is greater than the pipe thickness a of second sidewall 11, and therefore, after bending, the thickness of the first side wall 10 reduces, second sidewall 11
Thickness increase, i.e., the thickness of Extrude Face reduces, and the thickness of compressing surface increases, to make the thickness of Extrude Face and compressing surface more
It is close, avoid the Extrude Face of bend pipe excessively thin, the compressing surface of bend pipe is blocked up, improves the quality of bend pipe, extends the service life of bend pipe.
Since when processing sections 4 to be curved bending, second sidewall 11 can be compressed, so will by induction heater 2
The thickness a of second sidewall 11 is consistent with the thickness a of the thickness a of 3 tube wall of the first pipeline section, 5 tube wall of the second pipeline section, is conducive to straight tube
Manufacture, also, bend pipe manufacture after, the compression of compressing surface in a certain range, the quality of bend pipe is more preferably.And due to eccentric straight
Pipe 1 has certain springback capacity after heating is cooling, therefore, when processing sections 4 to be curved are carried out bending process, example
Such as, if by processing sections 4 to be curved bend it is in 90 ° if, then by mid-frequency induction heating circle 9 it is carried out heating bending when
Wait, be first bent into 92.5 °, after bend pipe is cooling, since it is with resilience, will automatic rebounding to 90 ° of bending tubes.By
This, 2.5 ° of the bending angle excessively is primary concern is that the angle of the bend pipe after tube bending jig release and after heat treatment is sprung back.
The eccentric straight tube 1 that the processing of the type bend pipe uses outer diameter to change, the bend pipe being processed into reduce medial thickness
Amount, alleviates the weight of pipe-line system.
It should be noted that in the present embodiment, the pipe thickness of the first pipeline section 3 and the second pipeline section 5 is 52mm, the two
Being formed by cross section is circular configuration；The pipe thickness of the first side wall 10 of processing sections 4 to be curved is 58mm, second sidewall 11
Pipe thickness is 52mm, and being formed by cross section is off-centre operation structure, i.e. its outer circle center has offset up 3mm.
Fig. 6 is please referred to, cooperation is referring to Fig. 2, after the carry out bending process of processing sections 4 to be curved, the wall thickness of the first side wall 10
Become 48 ± 3mm, the wall thickness of second sidewall 11 becomes 65 ± 5mm.
Please refer to Fig. 7, cooperation is referring to Fig. 8, and mid-frequency induction heating circle 9 with processing sections 4 to be curved using being equipped with
Oval induction coil, oval induction coil have opposite the first heated wall 14 and the second heated wall 15, the first 14 sets of heated wall
It is located on the first side wall 10, the second heated wall 15 is set in second sidewall 11, and the thickness of the first heated wall 14 is greater than second and adds
The thickness of hot wall 15.
It should be noted that in the present embodiment, the difference of the major and minor axis of oval induction coil is equal to the first side wall 10 and the
The difference of the pipe thickness of two side walls 11, this kind of ratio enable to oval induction coil moment and the first side wall 10, second sidewall
11 are completely embedded, and are unlikely to generate slippage, and heating effect is preferable.
It should be noted that in the present embodiment, the heating coil of mid-frequency induction heating circle 9 with a thickness of processing sections to be curved
1.5~3 times of 4 pipe thickness.Heating temperature caused by the thickness of the heating coil is more appropriate, is unlikely to so that second
Heating temperature in side wall 11 is excessively high.
It should be noted that in the present embodiment, the heating temperature range of mid-frequency induction heating circle 9 is 700~800 °.By
In the curved point of start and end there are transitional region (First Transition section 12 and the second changeover portion 13), it is such as heated to normal return bend temperature (900-
960 DEG C) bulge is easily generated, return bend temperature can suitably be reduced in this section to this, therefore, the return bend temperature that this section uses exists
Between 700~800 DEG C, the back segment in transition zone progressively increases to normal return bend temperature, and sense is suitably adjusted during bend pipe
The distance between bend pipe should be enclosed to control the uniformity of temperature.The heating temperature is bent out since temperature is suitable
The effect of the bend pipe come is preferable.
It should be noted that in the present embodiment, when the first pipeline section 3 of promotion, and then carrying out bending to processing sections 4 to be curved and adding
Working hour, when being advanced to inflection point (i.e. the tie point of the second changeover portion 13 and the second pipeline section 5), the propulsion speed of pusher angle coupling head 7
Degree control is in 0.1mm/S, and when being advanced to eccentric segment (processing sections 4 to be curved), the fltting speed of pusher angle coupling head 7 is adjusted to 0.1
~0.15mm/S.
At this point, when if the temperature in the second sidewall 11 of processing sections to be curved 4 is higher (effect that will lead to bending is deteriorated),
Supplement heat rejecter can be carried out using compressed air hose, i.e., compressed air hose is mounted in mid-frequency induction heating circle 9, it is empty in compression
It is punched on tracheae, and be passed through compressed air to cool down the second sidewall 11 of processing sections 4 to be curved.
In conclusion the processing method of the bend pipe includes eccentric straight tube 1 and induction heater 2, eccentric straight tube 1 includes successively
Connection the first pipeline section 3, processing sections to be curved 4 and the second pipeline section 5, induction heater 2 include preceding collet 6, pusher angle coupling head 7,
Guidance set 8, mid-frequency induction heating circle 9, supporting table and driver, driver and pusher angle coupling head 7 are sequentially connected, driver
For driving pusher angle coupling head 7 mobile；The step of processing method includes: step S1: eccentric straight tube 1 is mounted in supporting table,
Upper mid-frequency induction heating circle 9 is covered on processing sections 4 to be curved, the first pipeline section 3 is movably mounted in guidance set 8, before
Collet 6 blocks the end of the second pipeline section 5, the end of the first pipeline section 3 is clamped with pusher angle coupling head 7, and push 3 edge of the first pipeline section
Processing sections 4 to be curved direction it is mobile；Step S2: being passed through electric current of intermediate frequency in mid-frequency induction heating circle 9, heats processing sections to be curved
4, when 4 temperature of processing sections to be curved is increased to mecystasis, the first pipeline section 3 is promoted with mechanical thrust, to processing sections 4 to be curved into
Row is bent, and the processing sections to be curved 4 bent out are cooling with coolant rapidly.Using the eccentric straight tubes 1 of 2 pairs of medium frequency induction heater into
Row heating bending, i.e., be used for curved part for straight tube and be processed into eccentric tubes, only thicken the straight tube outer arc for being used for bend pipe, this
Sample will greatly reduce the amount of swelling of curved rear inner arc, reduce pipe-line system weight；Such as in bend pipe normal using concentric pipe, not
Reach minimum 48mm it is curved after wall thickness, the raw material wall thickness of use is at least 58mm, it is curved after inner arc side wall thickness can thicken to
80mm；And after taking eccentric straight tube 1 (becoming outer diameter) to bend, inside wall thickness can be reduced to 65mm；Simultaneously as variation only occurs in
Outer diameter ensure that the actual internal area of pipeline, highly beneficial for the flowing of pipeline interior media.The processing of this kind of processing method
Feature is: (one), the raw material straight tube used are different.The eccentric straight tube 1 that the processing of the type bend pipe uses outer diameter to change, adds
Work at bend pipe reduce medial thickness amount, alleviate the weight of pipe-line system.(2), the tooling used is different.1. the bend pipe
The induction heater 2 used is the induction heater 2 of oval eccentric, convenient for controlling between eccentric straight tube 1 and induction heater 2
Gap controls its red tape width and heating temperature.2. the guide roller part used is different, due to outer diameter tube bias, pipe
When being advanced to curved changeover portion of start and end (First Transition section 12 and the second changeover portion 13), the case where idler wheel comes to nothing will cause, rise not
To guiding role, therefore four guide rollers are by the way of individually adjusting, i.e., lead screws different by different motor controls
Operating, and then drive the rotation of different guide rollers respectively, can guarantee guide roller and eccentric straight tube 1 in overall process
It is in close contact.3. improving intermediate frequency power supply.Load is made of induction coil and compensation capacitor, connects into antiresonant circuit；It adopts
It is more efficient with the intermediate frequency power supply of series resonance, it can effectively reduce inside and outside wall temperature difference, improve the thrust of bend pipe processing, reduce and add
Work stress improves structural homogenity.(3), the difference of working process parameter.Since there are transitional region (the first mistakes for the curved point of start and end
Cross section 12 and the second changeover portion 13), it is such as heated to normal return bend temperature (900-960 DEG C) and easily generates bulge, it can be herein to this
Section suitably reduces return bend temperature, this section use return bend temperature between 700~800 DEG C, transition zone back segment gradually
Increase to normal return bend temperature, and suitably adjust during bend pipe induction coil between bend pipe at a distance to control the equal of temperature
Even property；The fltting speed of inflection point (First Transition section 12) is controlled in 0.1mm/S, into after eccentric segment (processing sections 4 to be curved)
It adjusts to 0.1~0.15mm/S；If the temperature of the second sidewall 11 of processing sections 4 to be curved is still higher during bend pipe, can
Supplement heat rejecter is carried out using compressed air hose, i.e., compressed air hose is mounted in mid-frequency induction heating circle 9, in compressed air hose
On punched, and be passed through compressed air and the second sidewall 11 of processing sections 4 to be curved can be cooled down.The bend pipe by
It is made in using above-mentioned processing method, therefore, structurally reasonable and using effect is good.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. a kind of processing method of bend pipe, including eccentric straight tube and induction heater, the bias straight tube includes sequentially connected
First pipeline section, processing sections to be curved and the second pipeline section, the induction heater include preceding collet, pusher angle coupling head, guidance set,
Mid-frequency induction heating circle, supporting table and driver, the driver and the pusher angle coupling head are sequentially connected, the driver
For driving the pusher angle coupling head mobile；It is characterized in that, the step of processing method, includes:
Step S1: on the supporting table by the eccentric straight tube installation, the upper intermediate frequency sense is covered on the processing sections to be curved
Heating coil is answered, first pipeline section is movably mounted in the guidance set, blocks described second with the preceding collet
The end of pipeline section, the end of first pipeline section is clamped with the pusher angle coupling head, and pushes first pipeline section along institute
The direction for stating processing sections to be curved is mobile；
Step S2: being passed through electric current of intermediate frequency in the mid-frequency induction heating circle, heats the processing sections to be curved, when described to be curved plus
When workshop section's temperature is increased to mecystasis, first pipeline section is promoted with mechanical thrust, the processing sections to be curved is carried out curved
System, the processing sections to be curved bent out are cooling with coolant rapidly.
2. the processing method of bend pipe according to claim 1, which is characterized in that the guidance set includes motor, multiple
It lead screw and is rotatablely connected with multiple guide rollers, the motor and multiple lead screws, the lead screw and states guide roller biography
Dynamic connection.
3. the processing method of bend pipe according to claim 1, which is characterized in that the pipe thickness of first pipeline section and institute
The pipe thickness for stating the second pipeline section is identical.
4. the processing method of bend pipe according to claim 3, which is characterized in that the processing sections to be curved have opposite the
One side wall and second sidewall, the pipe thickness of the first side wall are greater than the pipe thickness of the second sidewall, described second side
The pipe thickness of wall is identical as the pipe thickness of first pipeline section.
5. the processing method of bend pipe according to claim 4, which is characterized in that first pipeline section and the first side wall
Junction be First Transition section, the junction of second pipeline section and the first side wall is the second changeover portion, described first
The Curvature varying of changeover portion is 1:25, and the Curvature varying of second changeover portion is 1:25.
6. the processing method of bend pipe according to claim 4, which is characterized in that the mid-frequency induction heating circle using
The oval induction coil being equipped with the processing sections to be curved, the ellipse induction coil have opposite the first heated wall and
Second heated wall, first heated wall are set on the first side wall, and second heated wall is set in described second side
On wall, the thickness of first heated wall is greater than the thickness of second heated wall.
7. the processing method of bend pipe according to claim 6, which is characterized in that it is described ellipse induction coil major and minor axis it
Difference is equal to the difference of the pipe thickness of the first side wall and the second sidewall.
8. the processing method of bend pipe according to claim 1, which is characterized in that the heater wire of the mid-frequency induction heating circle
1.5~3 times of the pipe thickness with a thickness of the processing sections to be curved of circle.
9. the processing method of bend pipe according to claim 1, which is characterized in that the heating temperature of the mid-frequency induction heating circle
Spending range is 700~800 °.
10. a kind of bend pipe, which is characterized in that the bend pipe by the described in any item bend pipes of claim 1 to 9 processing method system
It forms.
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| CN201811284901.2A CN109175024B (en) | 2018-10-30 | 2018-10-30 | Bent pipe machining method and bent pipe |
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| CN201811284901.2A CN109175024B (en) | 2018-10-30 | 2018-10-30 | Bent pipe machining method and bent pipe |
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| CN109175024B CN109175024B (en) | 2020-04-07 |
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| CN110303299A (en) * | 2019-07-02 | 2019-10-08 | 上海一芯智能科技有限公司 | Bend pipe processing method suitable for gate |
| CN111530996A (en) * | 2020-06-15 | 2020-08-14 | 南京航空航天大学 | Tube free bending device based on eccentric structure design and process analysis method thereof |
| CN112658137A (en) * | 2020-10-29 | 2021-04-16 | 常熟安通机械成套设备制造有限公司 | Large-diameter steam pipeline bending process |
| CN112692126A (en) * | 2021-01-25 | 2021-04-23 | 任丘市冰川科技有限公司 | Oil-free bent pipe processing method |
| CN114472708A (en) * | 2021-12-24 | 2022-05-13 | 浙江中工石化设备有限公司 | Pipe bending die for pipe bending machine and pipe bending machine |
| CN114603713A (en) * | 2021-12-16 | 2022-06-10 | 杭州大和热磁电子有限公司 | L-shaped quartz tube processing jig |
| CN114653798A (en) * | 2022-04-01 | 2022-06-24 | 青岛主原旭泰信电器有限公司 | Control method and control system for heating bent pipe |
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| CN114472708A (en) * | 2021-12-24 | 2022-05-13 | 浙江中工石化设备有限公司 | Pipe bending die for pipe bending machine and pipe bending machine |
| CN114653798A (en) * | 2022-04-01 | 2022-06-24 | 青岛主原旭泰信电器有限公司 | Control method and control system for heating bent pipe |
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| CN109175024B (en) | 2020-04-07 |
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