CN108698110B - The diameter enlarging method and forming device of pipe - Google Patents
The diameter enlarging method and forming device of pipe Download PDFInfo
- Publication number
- CN108698110B CN108698110B CN201680083317.3A CN201680083317A CN108698110B CN 108698110 B CN108698110 B CN 108698110B CN 201680083317 A CN201680083317 A CN 201680083317A CN 108698110 B CN108698110 B CN 108698110B
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- Prior art keywords
- pipe
- shaped region
- roller
- rodlike
- towards
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/16—Making tubes with varying diameter in longitudinal direction
- B21C37/18—Making tubes with varying diameter in longitudinal direction conical 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
-
- 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
-
- 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
- B21D41/023—Enlarging by means of tube-flaring hand tools comprising rolling elements
Abstract
A kind of diameter enlarging method of pipe, comprising: one end is made to be fixed on the process that the pipe of turntable is rotated about its center axis；By the axially extending rodlike roller in pipe out of, pipe other end insertion tube, and the process contacted with the shaped region of the other end from pipe to specified position；The process of the shaped region of heating tube；Cooling process is carried out to the part in the non-shaped region from the specified position of pipe to one end at least close to shaped region；And the state for contacting rodlike roller from the shaped region with pipe, the process that the radial outward movement on direction of the one end from pipe towards the other end and to pipe is moved.
Description
Technical field
The present invention relates to the diameter enlarging method of pipe and the forming devices of implementation this method.
Background technique
The previous known method expanding to pipe progress part by mould pressing.For example, Patent Document 1 discloses utilizations
The diameter enlarging method of the pipe of a pair of discs roller.
Specifically, the pipe that turntable is fixed in one end is being configured in pipe in the diameter enlarging method disclosed in patent document 1
The first interior roller and the second roller being configured at outside pipe are rotated about its center axis in the state of clamping.Later, make the first roller and second
Roller is dynamic on direction of the one end from pipe to the other end and to being moved outwards.As a result, the first roller presses pressure pipe, from its pressing
The part of position to the other end is expanding.Second roller plays the role of improving the formability of expanding part.
Existing technical literature:
Patent document:
Patent document 1: Japanese Unexamined Patent Publication 2000-246353 bulletin.
Summary of the invention
Problems to be solved by the invention:
However, by moving up the spool roll being configured in pipe to expanding to pipe progress in the radial direction and axis of pipe
In the case where, as shown in fig. 7, it is intended to maintain original diameter close to the part of the another side of pipe than spool roll, thus than circle
Disk roller generates stretching bring close to the part of the one end of pipe and subtracts thick (so-called constriction).In order to inhibit such a constriction
It generates, expects to replace spool roll and use the axially extending rodlike roller in pipe.
But using rodlike roller, due to needing the formation zone of expanding subject area of a wide range of pressing as pipe
Domain, so needing for rodlike roller to be pushed into energetically outward to diameter.In this regard, rodlike roller can be reduced if the shaped region of heating tube
Push-on force.
But in the case where the shaped region of heating tube, give shaped region larger heat, heat be also transmitted to than at
Shape region is close to the region of the one end of pipe, that is, non-shaped region.Therefore, by the pressing of rodlike roller in shaped region, non-shaped area
Domain can also deform.
Therefore, it is an object of the present invention to which rodlike roller pressing can be inhibited non-shaped in the shaped region of the pipe of heating
The deformation in region.
The means solved the problems, such as:
In order to solve foregoing problems, the present invention provides a kind of diameter enlarging method of pipe, comprising: one end is made to be fixed on turntable
The process that pipe is rotated about its center axis；Axially extending rodlike roller in the pipe is inserted into the pipe from the other end of the pipe
Process that is interior, and being contacted with the shaped region until the other end to specified position of the pipe；Heat the formation zone of the pipe
The process in domain；To from the non-shaped region until the specified position to one end of the pipe at least close to the shaped region
Part carries out cooling process；And from the state contacted with the shaped region of the pipe, make the rodlike roller from the pipe
Direction of the one end towards the other end and the diameter outwardly direction towards the pipe on the process that moves.
According to above structure, since the pressing of rodlike roller is in the shaped region of the pipe of heating, so can be in the production for inhibiting constriction
It is expanding to shaped region progress with relatively small push-on force while raw.Moreover, because at least being connect in the non-shaped region of pipe
The part of nearly shaped region is cooled, so can inhibit the change in non-shaped region of the rodlike roller pressing in the shaped region of heating
Shape.
It is also possible to heat the shaped region of the pipe from the outside of the pipe.According to this structure, compared to out of pipe
The case where side thermoforming region, can inhibit the protuberance of the inner peripheral surface for the pipe that may be formed by the pressing of rodlike roller.
It is also possible to heat the shaped region of the pipe by induction heating.It is heated using burner (burner)
In the case where the shaped region of pipe, the temperature gradient between shaped region and non-shaped region slows down.In contrast, passing through sense
The temperature gradient steepening in the case where coming thermoforming region, between shaped region and non-shaped region should be heated.To if logical
It crosses induction heating and comes thermoforming region, then can more effectively inhibit the deformation in non-shaped region.It in other words, can high-precision landform
At the tapered portion of the track for showing rodlike roller in non-shaped region.
It is also possible to using the heater comprising the heating head opposite with the inner peripheral surface or outer peripheral surface of the pipe to heat
State the shaped region of pipe；Make the rodlike roller in one end direction from the pipe from the state contacted with the shaped region of the pipe
The direction of the other end and towards when moving in the diameter outwardly direction of the pipe, making the heating head and the rodlike roller
Mobile synchronously radially moving in the pipe.According to this structure, the distance between shaped region and the heating head of pipe can be made
It remains substantially centainly, can be carried out while steadily thermoforming region expanding.
It is also possible to using the cooler comprising the refrigerating head to the outer peripheral surface of pipe supply cooling medium to cool down
State the non-shaped region of pipe；Make the rodlike roller in one end court from the pipe from the state contacted with the shaped region of the pipe
When moving in the direction to the other end and the diameter outwardly direction towards the pipe, make the refrigerating head and the rodlike roller
Movement synchronously in the axially and radially upper movement of the pipe.According to this structure, even if shaped region exists along with rodlike roller
Moving and becoming narrow gradually in the axial direction of pipe, the top end of rodlike roller and the positional relationship of refrigerating head are also constant, so can continue cold
At least close to the part of shaped region in non-shaped region.
It is also possible to support at least other end of the pipe with help roll from radial outside, and from the forming with the pipe
The state of region contact makes the rodlike roller in one end from the pipe towards the direction of the other end and towards the diameter of the pipe
It is moved in outwardly direction.According to this structure, the swing of the pipe in forming can be prevented.
The top end for being also possible to the rodlike roller is flat surface.It according to this structure, is hemisphere compared to the top end of rodlike roller
The case where shape, can inhibit the interference of the tapered portion of the track for showing rodlike roller in rodlike roller and non-shaped region.So as to height
Precision the shaped region of pipe is carried out expanding.
Such as it is also possible to the thickness that the pipe has 8mm or more.
Also, the present invention provides a kind of forming device, have: the turntable of one end of fixing pipe；Prolong in the axial direction of the pipe
The rodlike roller stretched, the rodlike roller are inserted into the pipe from the other end of the pipe, and with from the other end of the pipe to predetermined bits
It is set to shaped region contact only；Heat the heater of the shaped region of the pipe；To from the specified position of the pipe to one end
Until non-shaped region in the part at least close to the shaped region carry out cooling cooler；And make described rodlike
Axially and radially upper mobile roller mobile device of the roller in the pipe.If above-mentioned pipe can be carried out using the forming device
Diameter enlarging method.
Invention effect:
According to the present invention, the deformation in non-shaped region of the rodlike roller pressing in the shaped region of the pipe of heating can be inhibited.
Detailed description of the invention
Fig. 1 is the schematic structural diagram for carrying out the forming device of the diameter enlarging method of the pipe of first embodiment according to the present invention；
Fig. 2 is to show the pipe before starting forming and the figure of the positional relationship of rodlike roller；
Fig. 3 is the pipe and the figure of the positional relationship of rodlike roller shown in forming；
Fig. 4 is the cross-sectional view of the IV-IV line along Fig. 2；
The A of Fig. 5 is the main view of heating head used in first embodiment, and B is the main view of the heating head of variation,
C is the main view of the heating head of other variations；
Fig. 6 is the schematic structural diagram for carrying out the forming device of the diameter enlarging method of the pipe of the second implementation form according to the present invention；
The figure for the constriction that Fig. 7 is generated when being for illustrating using spool roll.
Specific embodiment
(first embodiment)
Firstly, illustrating the diameter enlarging method of the pipe of first embodiment according to the present invention.The diameter enlarging method of this implementation form
It is carried out by forming device 1A shown in FIG. 1.
Forming device 1A is expanding to the progress of pipe 2 part by mould pressing.The material for constituting pipe 2 is not particularly limited, but this
The diameter enlarging method of implementation form is especially useful to the pipe 2 being made of the higher metal of resistance of deformation.The higher metal of resistance of deformation
Such as the difficult plastic processing material such as have stainless steel, titanium alloy.Even and if blame plastic processing material, but by mild steel, aluminium alloy
The pipe 2 of composition, if thickness, in 8mm or more, resistance of deformation is also got higher.
Specifically, forming device 1A includes pedestal 11 and is rotatably supported the turntable 12 in pedestal 11.Turntable
12 motor rotations omited by figure.In this implementation form, the axial direction of turntable 12 is vertical direction, but turntable 12 is axial
It can be other directions such as horizontal direction.
On turntable 12, the lower end (one end) of pipe 2 is with the consistent shape of rotation center of the central axis 20 and turntable 12 of pipe 2
Formula is fixed.I.e. pipe 2 is rotated around central axis 20.In this implementation form, the lower end of pipe 2 is and being set to chuck 13 of turntable 12
It is fixed on turntable 12.But the lower end of pipe 2 is without being limited thereto to the fixing means of turntable 12.For example, it is also possible to instead of chuck 13,
The cylindrical body chimeric with pipe 2 is set on turntable 12, the lower end of pipe 2 is bolted in the cylindrical body.
In addition, forming device 1A include from rodlike roller 3 of the inside by pressure pipe 2, the heater 4 from outside heating tube 2 and from
The cooler 5 of outside cooling tube 2.
Rodlike roller 3 is upwardly extended in the axis of pipe 2, cylindrical.Upper end (other end) insertion tube 2 of rodlike roller 3 from pipe 2
It is interior, it is contacted with the shaped region 21 from the upper end of pipe 2 to specified position.In this implementation form, the top end of rodlike roller 3 is to be parallel to
The flat surface in the face orthogonal with the axial direction of pipe 2.Therefore, the circumferential surface of rodlike roller 3 via the lesser bending section of radius of curvature and and the tip
End face connection.
The axial direction of rodlike roller 3 is substantially parallel without the axial direction centainly with pipe 2, substantial parallel (for example, their axial angles
Degree difference is within ± 10 degree).Also, the circumferential surface of rodlike roller 3 can be the tubular parallel with the axial direction of pipe 2, be also possible to
Upper or downward and that top end attenuates cone cell.In addition, the circumferential surface of rodlike roller 3 is smooth without having to, there are a little bumps also may be used.
It is provided on rodlike roller 3 from upper surface axis 31 outstanding upwards.Axis 31 is rotatably supported by arm 15.It is i.e. rodlike
Roller 3 is followed the rotation of pipe 2 and is rotated when the shaped region 21 with pipe 2 contacts.
Arm 15 be mounted on from pedestal 11 erect pillar 14a on first movement device 14 link.First movement device
14 as functioning rodlike roller 3 with mobile device in the roller of pipe 2 axially and radially moved by arm 15.This implementation form
In, first movement device 14 includes axial a pair of of direct acting actuator orthogonal each other.Each direct acting actuator can be electronic/oil
Pressure/air compressing cylinder, is also possible to ball screw framework, can also be rack pinion (rack and pinion) mechanism.But first moves
Dynamic device 14 or robots arm.
The shaped region 21 of 4 heating tube 2 of heater.In this implementation form, heater 4 is by induction heating come heating tube 2
Shaped region 21.Specifically, heater 4 as shown in Fig. 2, include the heating head 41 opposite with the outer peripheral surface of pipe 2, embedment plus
Multiple coils 42 of hot head 41 and the ac power supply circuit 43 for applying alternating voltage to coil 42.The frequency of alternating voltage is preferred
For the high-frequency of 5k~400kHz.That is, induction heating is preferably high-frequency induction heating.
In this implementation form, as shown in figure 4, the angle between heating head 41 and rodlike roller 3 in the circumferential direction of pipe 2 is 180
Degree, but the heating head 41 in the circumferential direction of pipe 2 and the angle between rodlike roller 3 may be the other angles such as 90 degree.Also, this
In implementation form, as shown in the A in Fig. 4 and Fig. 5, each coil 42 is the longer long round shape in the circumferential direction of pipe 2.But each coil 42
It can also be as shown in the B in Fig. 5, for the longer long round shape in the axial direction of pipe 2.Or can also as shown in the C in Fig. 5, with
A coil 42 is only arranged in the form for being depicted as polygonal (such as triangle).In addition, being also possible to be arranged in the circumferential direction of pipe 2
Form multiple heating heads 41 are set.
Fig. 2 is returned to, cooler 5 is at least to non-shaped region 22(, that is, pipe 2 from the above-mentioned specified position of pipe 2 to lower end
Region other than shaped region 21) in the part (i.e. top) close to shaped region 21 cooled down.It is cold in this implementation form
But device 5 is by the heat transmitting to cooling medium to the non-shaped region 22 of cooling tube 2.Specifically, cooler 5 includes to pipe
2 outer peripheral surface supplies the refrigerating head 51 of cooling medium and sends out cooling medium and the submitting machine of variable speed more to refrigerating head 51
52.For example, sending out machine 52 can be compressor in the case where cooling medium is gas (such as air, inert gas), it can also
Think fan.Or in the case where cooling medium is liquid (such as water, oil), machine 52 or pump are sent out.
The heating temperature of shaped region 21 based on heater 4 preferably constitute pipe 2 material fusing point 1/3 or more,
Further preferably 1/2 or more of fusing point.The cooling temperature on 22 top of non-shaped region based on cooler 5 is preferably non-shaped
The top in region 22 indeformable degree when rodlike roller presses on shaped region 21.
Especially, the gamut of shaped region 21 is preferably heated to same temperature by heater 4.Also, cooler 5 is preferred
For at least top in non-shaped region 22 cooling in the form of following: the heating temperature of the shaped region 21 based on heater 4 is in structure
At the material of pipe 2 fusing point 1/2 or more when, in non-shaped region 22 is from upper end to the position for only leaving a little distance
In very low range only, temperature drops to 1/4 or less the fusing point for constituting the material of pipe 2.For example, very low range is and rodlike roller
The height of 3 bending section is same degree.
In this implementation form, the heating head 41 of heater 4 and the refrigerating head 51 of cooler 5 are installed on holding plate 18.It keeps
Plate 18 be mounted on from pedestal 11 erect pillar 17a on the second mobile device 17 link.Second mobile device 17 is as logical
Crossing holding plate 18 functions heating head 41 with mobile device in the heating head of pipe 2 axially and radially moved, and as logical
Crossing holding plate 18 functions refrigerating head 51 with mobile device in the refrigerating head of pipe 2 axially and radially moved.This implementation shape
In state, the second mobile device 17 includes axial a pair of of direct acting actuator orthogonal each other.Each direct acting actuator can be electronic/oil
Pressure/air compressing cylinder, is also possible to ball screw framework, can also be rack and pinion mechanism.But the second mobile device 17 is also possible to
Robots arm.
It may also be heating head 41 is installed on arm 15, first movement device 14 plays function as heating head mobile device
Energy.Or be also possible to refrigerating head 51 and be installed on arm 15, first movement device 14 is functioned as refrigerating head with mobile device.
It is further possible to which the dedicated mobile device of heating head 41 and refrigerating head 51 are respectively set instead of the second mobile device 17 specially
Mobile device.
The ac power supply circuit 43 of heater 4 and the submitting machine 52 of cooler 5 are controlled by control device 6.For example, control dress
Setting 6 can be シ ー ケ Application サ (registered trademark), be also possible to the computer with memories such as CPU and ROM, RAM.
Control device 6 is connect with the first temperature sensor 61 and second temperature sensor 62.The inspection of first temperature sensor 61
The temperature of the shaped region 21 of test tube 2, the temperature on the top in the non-shaped region 22 of 62 detection pipe 2 of second temperature sensor.Example
Such as, the first temperature sensor 61 and second temperature sensor 62 are the radiation temperatures based on infrared ray or visible rays detection temperature
Meter.
In this implementation form, the first temperature sensor 61 and second temperature sensor 62 are installed on the bracket to hang down from arm 15
16.That is, the first temperature sensor 61 and second temperature sensor 62 move together with rodlike roller 3.But the first temperature sensor 61
And second temperature sensor 62 can also be installed on holding plate 18.Or first temperature sensor 61 and second temperature sensor 62
Can also be mobile by being different from the mobile device of first movement device 14 and the second mobile device 17, it may be also secured at certain
Position.
Control device 6 controls the output of heater 4 and cooler 5.Specifically, control device 6 is passed based on the first temperature
The ac power supply circuit 43 for the temperature control heater 4 that sensor 61 detects, and the temperature detected based on second temperature sensor 62
Control the submitting machine 52 of cooler 5.But it also can replace variable speed submitting machine 52 more and the submitting machine for using revolving speed fixed
With the flow control valve for being set to the flow path from submitting machine to refrigerating head, which is controlled by control device 6.
Then, referring to Fig.1~Fig. 3 illustrates movement of forming device 1A when expanding to the progress of pipe 2 part.
Firstly, first movement device 14 by rodlike roller 3 out of, pipe 2 upper end insertion tube 2, connect with the shaped region 21 of pipe 2
Touching (referring to Fig. 2).Later, by turntable 12, pipe 2 is rotated around central axis 20.But the rotation of pipe 2 can also be inserted in rodlike roller 3
Start before entering in pipe 2.
Then, 4 thermoforming region 21 of heater, and at least top in the cooling non-shaped region 22 of cooler 5.If forming
Region 21 and non-shaped region 22 are desired temperature, then first movement device 14 makes rodlike roller 3 from the formation zone with pipe 2
The state that domain 21 contacts, it is (i.e. upwards) and dynamic to the radial outward movement of pipe 2 on direction of the lower end from pipe 2 towards upper end.This
When, the second mobile device 17 make heating head 41 and refrigerating head 51 be synchronized with rodlike roller 3 movably in the axially and radially shifting of pipe 2
It is dynamic.Here, " synchronization " refer to respectively pipe 2 axially and radially on, the amount of movement of heating head 41 and refrigerating head 51 and rodlike roller 3
Amount of movement it is identical.For example, interruption carries out movement and rodlike roller 3 of the rodlike roller 3 in the axial direction of pipe 2 in pipe respectively as described later
In the case where 2 movement radially, when rodlike roller 3 is in the axial movement of pipe 2, heating head 41 and refrigerating head 51 are only in pipe 2
Axial movement equal amount, when rodlike roller 3 is in pipe 2 when moving radially, heating head 41 and refrigerating head 51 are only moved in the radial direction of pipe 2
Dynamic equal amount.
Heating head 41 and refrigerating head 51 are during axially and radially the moving of pipe 2, and control device 6 is also so that the first temperature passes
The temperature that sensor 61 detects becomes the ac power supply circuit 43 of the form control heater 4 of desired temperature, and so that second
The temperature that temperature sensor 62 detects becomes the submitting machine 52 of the form control cooler 5 of desired temperature.
If rodlike roller 3 moves up, it is accompanied by this that shaped region 21 becomes narrow gradually and non-shaped region 22 gradually broadens
(referring to Fig. 3).In other words, upwards and dynamic to being moved outwards with rodlike roller 3, the part of the lower end as shaped region 21 at
For the tapered portion (i.e. tapered portion show rodlike roller 3 track) of expanding processing, which becomes the one of non-shaped region 22
Part.
Movement of the rodlike roller 3 in the axial direction of pipe 2 and rodlike roller 3 pipe 2 movement radially can together continuously into
Row, they can also be interrupted progress respectively.Also, amount of movement of the rodlike roller 3 in the axial direction of pipe 2 can exist relative to rodlike roller 3
The amount of movement radially of pipe 2 is very big (angle of the tapered portion in non-shaped region 22 is smaller), or very small (non-
The angle of the tapered portion of shaped region 22 is larger).
Rodlike roller 3 upward and to the outside movement of the diameter of pipe 2 as shown in figure 3, in shaped region 21 by expanding to wishing
The time point of the amount of prestige terminates.The form that can be present in as a result, with tapered portion between path cylindrical portion and major diameter cylindrical portion, changes speech
Pipe 2 is carried out in the form of there is stepped part it is expanding.Later, if leaving rodlike roller 3 from pipe 2 and slightly up
Above-mentioned movement is repeated after Fang Yidong, then pipe 2 can be carried out in the form of with multiple stepped parts expanding.But rodlike roller can also be made
3 are moved upward to the upper end of pipe 2, to be carried out in the form of only having path cylindrical portion and tapered portion to pipe 2 expanding.
As described above, in the diameter enlarging method of the pipe of this implementation form, due to rodlike roller 3 pressing heating pipe 2 at
Shape region 21, so can be carried out with relatively small push-on force to shaped region 21 while inhibiting the generation of constriction expanding.
Moreover, because at least top in the non-shaped region 22 of pipe 2 is cooled, so the rodlike pressing of roller 3 can be inhibited in the forming of heating
The deformation in the non-shaped region 22 when region 21.
Also, in this implementation form, due to heating head 41 be synchronized with rodlike roller 3 pipe 2 radially movably in pipe 2
It moves radially, so it is substantially certain that the distance between shaped region 21 and heating head 41 of pipe 2 can be made to remain.So as to stabilization
Ground thermoforming region 21 is simultaneously expanding.Especially, in this implementation form, due to heating head 41 also with rodlike roller 3 pipe 2 axial direction
On movement synchronously in the axial movement of pipe 2, so even as movement of the rodlike roller 3 in the axial direction of pipe 2 and formation zone
Domain 21 becomes narrow gradually, and can also make the top end of rodlike roller 3 and the position relationship of heating head 41.
In addition, in this implementation form, since refrigerating head 51 and the movement of rodlike roller 3 synchronously move, so even as
Movement of the rodlike roller 3 in the axial direction of pipe 2 and shaped region 21 becomes narrow gradually, the top end of rodlike roller 3 and the position of refrigerating head 51
Relationship is also constant.So as to continue to cool down at least top in non-shaped region 22.
(the second implementation form)
Then, illustrate the diameter enlarging method of the pipe of the second implementation form according to the present invention.In this implementation form, shown in Fig. 6
Forming device 1B carry out the diameter enlarging method.In this implementation form, between the heating head 41 and rodlike roller 3 in the circumferential direction of pipe 2
Angle is 90 degree.That is, rodlike roller 3 is drawn by omitting in first movement device 14(Fig. 6) paper in above-below direction and with Fig. 6
Orthogonal direction is mobile.In addition, forming device 1B includes help roll 7 in this implementation form.The other structures of forming device 1B with
The forming device 1A of first embodiment is identical.
Help roll 7 is axially extending pipe 2, is hemispherical cylindric in top end.In this implementation form, the circumferential direction of pipe 2
On rodlike roller 3 and help roll 7 between angle be 90 degree, but the angle between the rodlike roller 3 in the circumferential direction of pipe 2 and help roll 7
Degree other angles such as may be 180 degree.
Help roll 7 at least (includes 2 upper end of pipe from at least top of the outside of pipe 2 contact shaped region 21 in formation
Part).In this implementation form, the length of help roll 7 is shorter than the length of rodlike roller 3, only with the upper contact of shaped region 21.But
The length for being also possible to help roll 7 is identical or longer than its as rodlike roller 3, and contacts with 21 entirety of shaped region.
It is provided on help roll 7 from upper surface axis 71 outstanding upwards.Axis 71 is rotatably supported by arm 81.That is, auxiliary
It helps roller 7 at the top of the shaped region 21 of contacting pipe 2, follows the rotation of pipe 2 and rotate.
Arm 81 be mounted on from pedestal 11 erect pillar 83 on direct acting actuator 82 link.Direct acting actuator 82 passes through
Arm 81 makes the moving radially in pipe 2 of help roll 7.For example, direct acting actuator 82 can be electronic/oil pressure/air compressing cylinder, or
Ball screw framework can also be rack and pinion mechanism.
In this implementation form, direct acting actuator 82 is so that help roll 7 presses on the form of pipe 2 always with certain pressing force
Controlled device 6 controls.That is, help roll 7 contacts rodlike roller 3 from the shaped region 21 with pipe 2 in first movement device 14
When state is moved upwards and to radial outward movement, from at least upper end of radial outside stay pipe 2.In other words, it is supported by help roll 7
At least upper end of pipe 2, and the pressing of rodlike roller 3 is in shaped region 21.In addition, the thickness of shaped region 21 becomes with expanding progress
It is thin.To which help roll 7 is less than rodlike roller 3 in the movement speed radially of pipe 2 in the movement speed radially of pipe 2.
Also effect same as first embodiment can be obtained in this implementation form.And in this embodiment, can lead to
The effect for crossing help roll 7 prevents the swing of the pipe 2 in forming.
(other implementation forms)
The present invention is not limited to first and second above-mentioned implementation form, can without departing from the spirit and scope of the invention into
The various deformations of row.
Such as be also possible to heater 4 and configured in the opposite form of the inner peripheral surface of heating head 41 and pipe 2, from the inside of pipe 2
Thermoforming region 21.If but from the outside thermoforming region 21 of pipe 2, compared to from the inside thermoforming region of pipe 2
21 the case where, can inhibit the protuberance of the inner peripheral surface for the pipe 2 that may be formed by the pressing of rodlike roller 3.Similarly, cooler 5
Also be configurable to refrigerating head 51 and supply cooling medium to the inner peripheral surface of pipe 2, from the inside of pipe 2 cooling non-shaped region 22 to
Few top.
Also, heater 4 is not necessarily to have to the shaped region 21 by induction heating come heating tube 2.Such as it can also be used as
Heater 4 and use from spray head (heating head) radiation flame burner.But in the shaped region 21 using burner heating tube 2
In the case where, the temperature gradient between shaped region 21 and non-shaped region 22 slows down.In this regard, being heated by induction heating
Temperature gradient steepening in the case where shaped region 21, between shaped region 21 and non-shaped region 22.To if passing through induction
Heating comes thermoforming region 21, then can more effectively inhibit the deformation in non-shaped region 22.In other words, it can accurately be formed
The tapered portion of the track for showing rodlike roller 3 in non-shaped region 22.
Make heating head 41 and refrigerating head 51 in the axial movement of pipe 2 also, being also possible to the second mobile device 17 and not having
Function only has the function of making heating head 41 and refrigerating head 51 moving radially in pipe 2.That is, being also possible to fill when first movement
When setting 14 moves rodlike roller 3 upwards and to the radial outward movement of pipe 2 from the state that the shaped region 21 with pipe 2 contacts, second is moved
Dynamic device 17 moves heating head 41 and refrigerating head 51 only synchronously in the radial direction of pipe 2 with rodlike roller 3 in the movement radially of pipe 2
It is dynamic.
Also, being also possible in the lesser situation of expanding amount of pipe 2, the one party or double of heating head 41 and refrigerating head 51
Side is fixed on certain position.Or be also possible in the biggish situation of expanding amount of pipe 2, refrigerating head 51 is fixed on one
Positioning is set, and by the control based on second temperature sensor 62, is adjusted supply to the inner peripheral surface of pipe 2 or the cooling of outer peripheral surface and is situated between
The supply amount of matter.
Cooler 5 is not necessarily to have to by transmitting to the heat of cooling medium come the non-shaped region 22 of cooling tube 2 at least
Top.For example, cooler 5 can also be formed as such as flowering structure: being connect by with the radiating component that is deformed and the forming according to pipe 2
It touches to cool down at least top in non-shaped region 22.
The top end of rodlike roller 3 for example may be hemispherical.But if the top end of rodlike roller 3 is flat surface, compared to stick
The top end of shape roller 3 is hemispherical situation, can inhibit rodlike roller 3 and the track for showing rodlike roller 3 in non-shaped region 22
The interference of tapered portion.It is carried out so as to the shaped region 21 accurately to pipe 2 expanding.
Also, the heating of the shaped region 21 of pipe 2, pipe 2 non-shaped region 22 at least top cooling and rodlike roller 3
The pressing of shaped region 21 is not necessarily to have to carry out simultaneously.Such as it is also possible to the shaped region 21 of heating tube 2 first, so
Stop the heating of the shaped region 21 of pipe 2 afterwards and cools down non-shaped region 22, stop the cooling in non-shaped region 22 later and incite somebody to action
Rodlike roller 3 is by pressing to shaped region 21.
Symbol description:
1A, 1B forming device；
14 first movement devices (roller mobile device)；
17 second mobile devices (heating head mobile device, refrigerating head mobile device)；
2 pipes；
20 central axises；
21 shaped regions；
22 non-shaped regions；
3 rodlike rollers；
4 heaters；
41 heating heads；
5 coolers；
51 refrigerating heads；
6 control devices；
61 first temperature sensors；
62 second temperature sensors；
7 help rolls.
Claims (13)
1. a kind of diameter enlarging method of pipe, which is characterized in that
It include: that one end is made to be fixed on the process that the pipe of turntable is rotated about its center axis；
Axially extending rodlike roller in the pipe is inserted into the pipe from the other end of the pipe, and with from the another of the pipe
The process of shaped region contact until one end to specified position；
The formation zone of the pipe is heated using the heater comprising the heating head opposite with the inner peripheral surface or outer peripheral surface of the pipe
The process in domain；
To from the part at least close to the shaped region in the non-shaped region until the specified position to one end of the pipe
Carry out cooling process；And
From the state contacted with the shaped region of the pipe, make the rodlike roller in one end from the pipe towards the side of the other end
To and towards moving in the diameter outwardly direction of the pipe, and make the movement of the heating head and the rodlike roller synchronously
In the process of the pipe radially moved.
2. the diameter enlarging method of pipe according to claim 1, which is characterized in that
The shaped region of the pipe is heated from the outside of the pipe.
3. the diameter enlarging method of pipe according to claim 1, which is characterized in that
The shaped region of the pipe is heated by induction heating.
4. the diameter enlarging method of pipe according to any one of claim 1 to 3, which is characterized in that
The non-shaped of the pipe is cooled down using the cooler comprising the refrigerating head to the outer peripheral surface of pipe supply cooling medium
Region；
Make the rodlike roller in one end from the pipe towards the side of the other end from the state contacted with the shaped region of the pipe
To and towards when moving in the diameter outwardly direction of the pipe, make the movement of the refrigerating head and the rodlike roller synchronously
In the axially and radially upper movement of the pipe.
5. the diameter enlarging method of pipe according to any one of claim 1 to 3, which is characterized in that
Support at least other end of the pipe with help roll from radial outside, and from the state contacted with the shaped region of the pipe
Move up the rodlike roller towards the direction of the other end and towards the diameter outwardly direction of the pipe in one end from the pipe
It is dynamic.
6. the diameter enlarging method of pipe according to any one of claim 1 to 3, which is characterized in that
The top end of the rodlike roller is flat surface.
7. the diameter enlarging method of pipe according to any one of claim 1 to 3, which is characterized in that
The pipe has the thickness of 8mm or more.
8. a kind of forming device, which is characterized in that
Have: the turntable of one end of fixing pipe；
In the axially extending rodlike roller of the pipe, which is inserted into the pipe from the other end of the pipe, and with from institute
Shaped region contact until stating the other end to specified position of pipe；
The heater of shaped region including the heating head opposite with the inner peripheral surface or outer peripheral surface of the pipe and the heating pipe；
To from the part at least close to the shaped region in the non-shaped region until the specified position to one end of the pipe
Carry out cooling cooler；
Make the rodlike roller in the axially and radially upper mobile roller mobile device of the pipe；And
When the roller mobile device makes the rodlike roller from the state contacted with the shaped region of the pipe, from the pipe
When being moved in direction of the one end towards the other end and the diameter outwardly direction towards the pipe, make the heating head with it is described
The movement of rodlike roller is synchronously in the heating head mobile device of the pipe radially moved.
9. forming device according to claim 8, which is characterized in that
It is also equipped with: detecting the first temperature sensor of the temperature of the shaped region of the pipe；
Detect the second temperature sensor of the temperature of the part close to the shaped region in the non-shaped region of the pipe；With
And
Temperature based on first temperature sensor detection controls the heater, and is examined based on the second temperature sensor
The temperature of survey controls the control device of the cooler.
10. forming device according to claim 8, which is characterized in that
The heater heats the shaped region by induction heating.
11. the forming device according to any one of claim 8 to 10, which is characterized in that
The cooler includes the refrigerating head to the outer peripheral surface of pipe supply cooling medium；
The forming device is also equipped with, when the roller contacts the rodlike roller from the shaped region of the pipe with mobile device
State, when being moved in diameter outwardly direction of the one end from the pipe towards the direction of the other end and towards the pipe,
Move the movement of the refrigerating head and the rodlike roller synchronously in the axially and radially upper mobile refrigerating head of the pipe
Device.
12. the forming device according to any one of claim 8 to 10, which is characterized in that
Be also equipped with, when the roller mobile device makes the rodlike roller from the state contacted with the shaped region of the pipe, from
When being moved in direction of the one end of the pipe towards the other end and the diameter outwardly direction towards the pipe, from radial outside
Support the help roll of at least other end of the pipe.
13. the forming device according to any one of claim 8 to 10, which is characterized in that
The top end of the rodlike roller is flat surface.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/001438 WO2017158635A1 (en) | 2016-03-14 | 2016-03-14 | Tube diameter expanding method and molding apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108698110A CN108698110A (en) | 2018-10-23 |
| CN108698110B true CN108698110B (en) | 2019-10-08 |
Family
ID=59851413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680083317.3A Active CN108698110B (en) | 2016-03-14 | 2016-03-14 | The diameter enlarging method and forming device of pipe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20190076903A1 (en) |
| EP (1) | EP3431205B1 (en) |
| JP (1) | JP6574518B2 (en) |
| CN (1) | CN108698110B (en) |
| WO (1) | WO2017158635A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110871242B (en) * | 2018-08-29 | 2021-07-30 | 中国石油天然气集团有限公司 | Manufacturing device and method for bell and spigot type steel pipe |
| CN109013925A (en) * | 2018-09-19 | 2018-12-18 | 昆山鼎坚精密机械有限公司 | The dedicated spindle cooling device of automotive hub spinning machine |
| CN111016246A (en) * | 2018-10-09 | 2020-04-17 | 聚合兴企业有限公司 | High-precision temperature control system for rolling roller |
| CN109821926A (en) * | 2019-03-28 | 2019-05-31 | 北京科技大学 | A kind of expander and method of major diameter copper alloy tube |
| CN109821927B (en) * | 2019-03-28 | 2021-06-29 | 北京科技大学 | Production method of large-diameter white copper pipe |
| CN110026493B (en) * | 2019-04-08 | 2021-07-27 | 舟山巨洋技术开发有限公司 | Can lid press |
| JP7116009B2 (en) | 2019-05-29 | 2022-08-09 | トヨタ自動車株式会社 | Press molding method |
| CN110508658A (en) * | 2019-07-31 | 2019-11-29 | 上海航天精密机械研究所 | Steel pipe spinning temperature automatic control equipment and control method |
| CN110586783B (en) * | 2019-09-23 | 2020-12-18 | 嘉兴华竹电子有限公司 | Water pipe props big device |
| CN113369394A (en) * | 2021-05-21 | 2021-09-10 | 新乡市博威机械有限公司 | Horizontal type pipe expander with efficient cooling mechanism |
| WO2023106184A1 (en) * | 2021-12-07 | 2023-06-15 | 日本スピンドル製造株式会社 | Flow forming system |
| KR102428527B1 (en) * | 2022-05-27 | 2022-08-03 | 주식회사 태성스틸 | Apparatus and method for improving low-temperature toughness of steel pipe expansion part |
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- 2016-03-14 EP EP16894259.7A patent/EP3431205B1/en active Active
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| EP0081700A1 (en) * | 1981-11-20 | 1983-06-22 | Air Products And Chemicals, Inc. | Spin forming |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3431205B1 (en) | 2021-07-14 |
| JPWO2017158635A1 (en) | 2019-02-14 |
| EP3431205A4 (en) | 2019-08-14 |
| EP3431205A1 (en) | 2019-01-23 |
| US20190076903A1 (en) | 2019-03-14 |
| JP6574518B2 (en) | 2019-09-11 |
| WO2017158635A1 (en) | 2017-09-21 |
| CN108698110A (en) | 2018-10-23 |
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