CN101530876A - Bulge forming method and bulge forming apparatus - Google Patents
Bulge forming method and bulge forming apparatus Download PDFInfo
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- CN101530876A CN101530876A CN 200910128173 CN200910128173A CN101530876A CN 101530876 A CN101530876 A CN 101530876A CN 200910128173 CN200910128173 CN 200910128173 CN 200910128173 A CN200910128173 A CN 200910128173A CN 101530876 A CN101530876 A CN 101530876A
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Abstract
The invention provides a bulge forming method and bulge forming apparatus. The sealing portion (140) is in an anterior side of a forming direction is applied with liquid pressure of the pressurized liquid (L) in a direction from the rod (130) toward the raw material tube (2) so as to be followable to bulging of the raw material tube (2), which enables at least a part of the sealing portion (140) in close contact with the raw material tube (2) permanently. The distance between the sealing portions (140,150) is set to have a length of at least two crest portions of the inner surface shape (11) of the die (10), and a length in the axial direction of the sealing portion (150) in a posterior side of the forming direction is set to have a length of at least one crest portion of the inner surface shape (11) of the die (10). And thus the sealing portion (150) can always in close contact with any of the vale sections (2B) formed by the flat section of the raw material tube (2) and the raw material tube.
Description
Technical field
The present invention relates to a kind of crowded shape method and crowded shape device that is expanded into of being expanded into as described below: promptly, the base pipe that is disposed between mould and the bar is applied axial compression stress, and in the base pipe supply pressure liquid, bar is moved vertically, thereby makes the base pipe be configured as the inner surface configuration of mould; Specially refer to the sealing that seals between base pipe and the bar.
Background technology
Squeeze and to be expanded into the shaping that the shape method is applied to the hollow structure parts etc. of container and processing tube, motor vehicle and various device.Be expanded in the shape method crowded, make base pipe differential expansion ground carry out expander by mode, thereby make the base pipe be configured as anticipated shape with the not attenuation of base thickness of pipe wall.The forming tube that squeeze to expand that obtains thus comprises: have the corrugated part of a plurality of dilations and be rich in flexible and flexible pipe that can be crooked, utilize the big characteristics of the common pipe of surface area ratio to carry out the bellows (bellows) of heat release etc. and utilize the shape of corrugated part to play the bellows etc. of the such spring function of spring.
Be expanded in the shape method crowded, for example adopt the crowded shape device 1 (for example with reference to TOHKEMY 2001-321841 communique) that is expanded into shown in Figure 7.Fig. 7 illustrates the sectional view that squeezes the summary structure that is expanded into shape device 1.In addition, in Fig. 7, show the structure of squeezing the first half that is expanded into shape device 1.In addition, for simplicity of illustration, in whole figure, the right end position relative with mould 10 that makes base pipe 2 is identical.Squeeze and to be expanded into shape device 1 and to have: internal configurations has the mould 10 of base pipe 2 and for the butt mould 20 of the left part butt of base pipe 2.Mould 10 and butt mould 20 are made of a pair of upper die and lower die respectively. Mould 10,20 is by preventing that the fixture that they are opened (diagram omit) from fixing.
Inner surface at mould 10 is formed with the bellows-shaped 11 that is alternately formed by a plurality of mountain 11A of portion and the 11B of paddy portion.11A of mountain portion and the 11B of paddy portion be periodically formation and shape axisymmetricly for example.Be provided with axially displaceable bar 30 in base pipe 2 inside.Be formed with pressure fluid in the inside of bar 30 and supply with stream 31, supply with stream 31 by pressure fluid supply port 31A supply pressure liquid L between base pipe 2 and bar 30 from this pressure fluid.
Be formed with a pair of groove 32,33 on the peripheral surface of bar 30, pressure fluid supply port 31A is between this is to groove.In groove 32,33, dispose sealing 40,50 to a pair of ring-type that seals between base pipe 2 and the bar 30.On bar 30, on the position of the side that more keeps left at shaping direction opposition side and than sealing 50, be formed with the pressure fluid recovery stream (diagram is omitted) that is used for being recovered in the used pressure fluid L of shaping.Pressure fluid L after the recovery supplies in the pressure fluid recovery stream 31 and utilizes.Be provided with in the right part of bar 30 and be used to make bar 30 to axial right side (shaping direction side) mobile moving structure (diagram is omitted).On the right side of mould 10, be provided with the base pipe pressing mechanism (diagram is omitted) that base pipe 2 is applied compression stress F to butt mould 20.
Be expanded in the shape device 1 crowded, the left part of base pipe 2 is connected on the butt mould 20, this base pipe 2 is applied with compression stress F from its right part to axial left side (shaping direction opposition side), simultaneously from pressure fluid supply port 31A supply pressure liquid L between base pipe 2 and bar 30.Pressure fluid L is set to the high pressure that base pipe 2 is out of shape along with the 11A of mountain portion of the bellows-shaped 11 of mould 10, seals between 40,50 pairs of base pipes 2 of sealing and the bar 30.Under such state, bar 30 is moved to axial right side, whenever to the position supply pressure liquid L corresponding the time with the 11A of mountain portion of mould 10, base pipe 2 be subjected to the pressure fluid L under the high pressure conditions effect and along with the shape of the 11A of this mountain portion expands.Like this, by 2A of portion and the 2B of paddy portion of coming out of retirement and taking up an official post that on base pipe 2, begin to be shaped singly successively, thereby base pipe 2 expanders are configured as bellows-shaped 11 corresponding shape with mould 10 from the left side.
Yet, be expanded into during expander that shape device 1 carries out is shaped utilize squeezing, owing in order to make the base tube swelling make pressure fluid L become high pressure, therefore after the 2A of first mountain portion is shaped, when pressure fluid supply port 31A was mobile between the mountain of mould 10 11A of, 11A, the seal of sealing 40,50 can produce following problems.
In the expander forming process, after base pipe 2 being shaped come out of retirement and take up an official post the 2A of portion, for next mountain portion (the 3rd mountain portion) that is shaped, shown in Fig. 8 B, when making bar 30 under the state of the high pressure of keeping pressure fluid L the direction of arrow moving in figure, the sealing 40 of shaping direction side is the 3rd 11A of mountain portion by the bigger part in sealing portion 40 in mould 10 and the interval between the bar 30.At this moment, because, therefore being difficult to sealing 40 to shaping direction side along with the shape of the 3rd 11A of mountain portion expands, base pipe 2 applies pressing force from mould 10.Consequently, the seal of sealing 40 reduces, thereby might cause pressure fluid L to leak into right hand external from this.Thus, for the high pressure of keeping pressure fluid L must improve hydraulic pressure, produced temporal waste.
On the other hand, shown in Fig. 8 B, during the 2A of first mountain portion that by on base pipe 2, being shaped at the sealing 50 of shaping direction opposition side,, therefore might cause pressure fluid L to leak into left hand external from this owing between sealing 50 and the 2A of this mountain portion, formed bigger gap.Thus, for the high pressure of keeping pressure fluid L must improve hydraulic pressure, produced temporal waste.The seal problem of aforesaid sealing 40,50 can be after the 2A of first mountain portion be shaped, and pressure fluid supply port 31A produces when moving between the 11A of mountain portion, the 11A of mould 10.
In addition,, consider following countermeasure:, the hydraulic pressure of pressure fluid L set between high pressure and low pressure switch according to the position of sealing 40,50 with respect to the bellows-shaped 11 of mould 10 for the seal problem of the sealing 40 of shaping direction side.
Behind the 2A of first mountain portion that for example is shaped like that shown in Fig. 9 A, and shown in Fig. 9 B, make bar 30 like that before axial right side (direction of arrow among the figure) moves with the next mountain portion that is shaped, pressure fluid L is being become to make the low pressure of base pipe 2 distortion.Then, pressure fluid supply port 31A is arrived near second 11A of mountain portion, and after making sealing 40 arrive the adjacent 11B of paddy portion in these second mountain portion 11A right side, keeping sealing 40 at this place.Next, shown in Fig. 9 C, make bar 30 stop to move, and make pressure fluid L become high pressure, thereby make base pipe 2 second 2A of mountain portion that be shaped.
Then, shown in Fig. 9 D, carry out the action identical with Fig. 9 B, become low pressure at the hydraulic pressure that makes pressure fluid L, pressure fluid supply port 31A is arrived near the 3rd 11A of mountain portion, and the sealing 40 that makes shaping direction side keeps sealing 40 at this place after arriving the adjacent 11B of paddy portion in the 3rd mountain portion 11A right side.By like this hydraulic pressure of pressure fluid L being set for: whenever the 2A of mountain portion be shaped and pressure fluid supply port 31A between the 11A of mountain portion, 11A when mobile, between high pressure and low pressure, switch, thereby eliminated the seal problem of the sealing 40 of shaping direction side.
Yet, between high pressure and low pressure, repeat to switch owing to the hydraulic pressure of pressure fluid L being set for for expander shaping base pipe 2, so the switching spended time of this hydraulic pressure, be difficult to carry out at high speed expander and be shaped.In addition, owing to can't make pressure fluid L remain high pressure, so the shape stability that base pipe 2 formalizes on the mould 10 reduces, and consequently, the precision that expander is shaped reduces, and the deviation of product increases.Particularly will be shaped on base pipe 2 when to have the bellows-shaped of a plurality of mountain 2A of portion, this problem is more remarkable.
Summary of the invention
The object of the present invention is to provide a kind of crowded shape method that is expanded into to be expanded into the shape device, not only can prevent that pressure fluid from leaking, can also at a high speed and carry out the expander shaping accurately, and can prevent product generation deviation thus with squeezing.
The crowded shape method that is expanded into of a first aspect of the present invention is, mould has the inner surface configuration that is alternately formed by a plurality of mountain portions and paddy portion, dispose the base pipe at this mould inside, inside at the base pipe is provided with bar vertically, this bar has the pressure fluid supply port, and be provided with a pair of sealing to sealing between base pipe and the bar, and make this pressure fluid supply port between this is to sealing, the base pipe is applied axial compression stress, and from pressure fluid supply port supply pressure liquid in the base pipe, bar is moved vertically, make the base pipe be configured as the inner surface configuration of mould, it is characterized in that, by along from bar towards the direction of base pipe to the exert pressure hydraulic pressure of liquid of the sealing of shaping direction side, thereby make sealing can follow the expansion of base pipe, interval between the sealing is set to the distance of amount of at least two mountain portions of the inner surface configuration that is equivalent to mould, and the axial length of the sealing of shaping direction opposition side is set to the distance of amount of at least one mountain portion of the inner surface configuration that is equivalent to mould.
Be expanded in the shape method the crowded of a first aspect of the present invention, the base pipe is being applied axial compression stress, and in by the zone that a pair of sealing sealed, from the pressure fluid supply port in the base pipe supply pressure liquid time, bar is moved vertically, therefore whenever to corresponding with the mountain portion of mould position supply pressure liquid the time, the base pipe all can the shape along with this mountain portion expand under the pressure fluid effect.Like this, by making the base pipe, thereby base pipe expander is configured as inner surface configuration corresponding shape with mould from the moving direction opposition side (shaping direction opposition side) of bar beginning portion and the paddy portion of coming out of retirement and taking up an official post that be shaped singly successively.
Wherein, be expanded in the shape method, can when being shaped, closely contact with the base pipe as described below a pair of sealing that seals between base pipe and the bar the crowded of a first aspect of the present invention.After mountain portion of base pipe was shaped, the sealing of shaping direction side was during by the position corresponding with the next mountain portion of mould, and base pipe shape along with this mountain portion under the pressure fluid effect expands.In this case, by along from bar towards the direction of base pipe to the sealing of the shaping direction side hydraulic pressure of liquid of exerting pressure, thereby make the sealing of shaping direction side can follow the expansion of base pipe.Thereby, suitably set by shape and elastic characteristic, the hydraulic pressure of pressure fluid and the translational speed of bar etc. sealing, so that when following expansion, under one end and bar state of contact of sealing portion, the other end of sealing portion can be contacted with the base pipe, thereby at least a portion of the sealing of shaping direction side is closely contacted with the base pipe all the time.Consequently, even when the base pipe is shaped, all the time pressure fluid is set to high pressure, can prevent that also pressure fluid from leaking into shaping direction side outside.
On the other hand, owing to the interval between the sealing is set to the distance of amount of at least two mountain portions of the inner surface configuration that is equivalent to mould, the axial length of the sealing of shaping direction opposition side is set to the distance of amount of at least one mountain portion of the inner surface configuration that is equivalent to mould, therefore suitably set by shape and elastic characteristic the sealing of shaping direction opposition side, can make sealing portion all the time with the good paddy portion of the shaping of the par of base pipe and base pipe in the either party closely contact.Consequently, even when the base pipe is shaped, all the time pressure fluid is set to high pressure, can prevent that also pressure fluid from leaking into the outside of shaping direction opposition side.In addition, distance as the amount that is equivalent to two mountain portions at the interval between the sealing is, the amount of good mountain portion that is shaped and in total distance of the amount of the mountain portion of its shaping direction opposition side, the mountain portion of this shaping direction opposition side is in order to prevent that buckling of causing set by the compression stress that imposes on the base pipe.
Be expanded in the shape method the crowded of aforesaid a first aspect of the present invention, even when the base pipe is shaped, all the time pressure fluid is set to high pressure, can prevent that also pressure fluid from leaking into the outside, therefore need not the amount of hydraulic pressure deficiency is replenished, also need not to make hydraulic pressure between high pressure and low pressure, to switch, therefore can high pressure and at high speed the base pipe is formed.In addition,, therefore improved formalize shape stability on the mould of base pipe, consequently, can improve the precision that expander is shaped, thereby can prevent that product from producing deviation because pressure fluid can remain high pressure.And then, because the zone that is supplied to pressure fluid is not is the base pipe and the corresponding whole zone of the inner surface configuration with mould between the bar, and only between base pipe and the bar by zone that a pair of sealing sealed, therefore the miniaturization of the fixture of fixed mould can be realized, cost can be reduced thus.The crowded shape method that is expanded into so preferably is applicable to thin-walled base pipe.
The crowded shape method that is expanded into of a first aspect of the present invention can adopt various structures.For example can constitute: when the pressure fluid supply port arrived the central portion of mountain portion of mould, the moving of temporary transient locking lever carried out the shaping of the mountain portion of the mould directly over the pressure fluid supply port.In this form, even under the thicker situation of the wall thickness of base pipe, also can carry out this shaping reliably according to the inner surface configuration of mould.
The crowded shape method that is expanded into of a first aspect of the present invention can be applied to crowded being expanded in the shape device.That is, the crowded shape device that is expanded into of a first aspect of the present invention comprises: mould, and it has the inner surface configuration that is alternately formed by a plurality of mountain portions and paddy portion, and this mould inside disposes the base pipe; Bar, it is provided with vertically in base pipe inside, and has the pressure fluid supply port; And a pair of sealing, the pressure fluid supply port is between this is to sealing, and this to sealing to sealing between base pipe and the bar, the base pipe is applied axial compression stress, and from pressure fluid supply port supply pressure liquid in the base pipe, bar is moved vertically, thereby make the base pipe be configured as the inner surface configuration of mould, it is characterized in that, should squeeze to be expanded into and be provided with hydraulic pressure in the shape device and apply stream, this hydraulic pressure apply through-flow road be used for along from bar towards the direction of base pipe to the exert pressure hydraulic pressure of liquid of the sealing of shaping direction side, sealing portion can follow the expansion of base pipe under the effect of the hydraulic pressure that applies the pressure fluid that stream is applied in by hydraulic pressure, interval between the sealing is set to the distance of amount of at least two mountain portions of the inner surface configuration that is equivalent to mould, and the axial length of the sealing of shaping direction opposition side is set to the distance of amount of at least one mountain portion of the inner surface configuration of mould.A first aspect of the present invention crowded is expanded into the shape device can access crowded identical effect of shape method and the effect of being expanded into above-mentioned first aspect.
In addition, the crowded shape device that is expanded into of a first aspect of the present invention can adopt various structures.For example can constitute: when the pressure fluid supply port arrived the central portion of mountain portion of mould, the moving of temporary transient locking lever carried out the shaping of the mountain portion of the mould directly over the pressure fluid supply port.In this form, can access crowded identical effect of shape method and the effect of being expanded into above-mentioned first aspect.
The crowded shape method that is expanded into of a second aspect of the present invention, it is characterized in that, mould has the inner surface configuration that is alternately formed by a plurality of mountain portions and paddy portion, dispose the base pipe at this mould inside, inside at the base pipe is provided with bar, this bar constitutes by being fixed in the mould and having the guide rod of pressure fluid supply port and be disposed at guide rod hollow stem on every side movably, be provided with a pair of sealing to sealing between base pipe and the bar, and make the pressure fluid supply port between this is to sealing, the seal portion configurations of one side is become axially being led by guide rod along the base pipe, and the sealing of opposite side is fixed on the guide rod
The base pipe is being applied axial compression stress, and in the base pipe, supply pressure liquid the time, is moving vertically, thereby making the base pipe be configured as the inner surface configuration of mould by making hollow stem from the pressure fluid supply port,
When the base pipe is shaped, under the hydraulic action of pressure fluid, the sealing of one side is pushed towards the end of the shaping direction opposition side of hollow stem and strain is taken place, thereby make sealing portion can follow the expansion of base pipe, and control the position of the sealing of a side by moving of hollow stem.
Be expanded in the shape method the crowded of a second aspect of the present invention, in axial compression stress that the base pipe is exerted pressure, from the pressure fluid supply port of guide rod to by the regional supply pressure liquid in the base pipe that a pair of sealing sealed the time, hollow stem is moved vertically, therefore when pressure fluid being supplied to the position corresponding with the mountain portion of mould, the base pipe expands along with the shape of this mountain portion under the effect of pressure fluid.Like this, by making the base pipe, thereby base pipe expander is configured as inner surface configuration corresponding shape with mould from the moving direction opposition side (shaping direction opposition side) of hollow stem beginning portion and the paddy portion of coming out of retirement and taking up an official post that be shaped singly successively.
Wherein, be expanded in the shape method, can closely contact with the base pipe as described below a pair of sealing that seals between base pipe and the bar the crowded of a second aspect of the present invention.Under the hydraulic action that is fed into the pressure fluid between base pipe and the bar, the sealing quilt of one side (shaping direction side) is pushed towards the end of the shaping direction opposition side of hollow stem, therefore strain takes place in the sealing of a side under the pushing of pressure fluid, thereby is following the expansion of base pipe.Thereby, by the shape of sealing and the hydraulic pressure of elastic characteristic and pressure fluid etc. are suitably set, at least a portion of the sealing of a side is closely contacted all the time with the base pipe.
In addition, control the position of the sealing of a side by moving of hollow stem, therefore the translational speed of hollow stem can be controlled at more than the speed of expansion of base pipe, the sealing of a side is more moved by the direction of shaping direction side to the expansion starting position of base pipe with than this position all the time.Thus, the sealing of a side is on the end of the shaping direction opposition side that is pressed against hollow stem under the hydraulic action of above-mentioned pressure fluid, so the elastic deformation amount increases.Thereby, because the sealing of a side is being followed the expansion of base pipe easily, therefore can further improve at least a portion and the tight contact base pipe of the sealing of a side.Consequently, even when the base pipe is shaped, all the time pressure fluid is set to high pressure, can prevent that also pressure fluid from leaking into shaping direction side outside.
In addition, because the sealing of opposite side (shaping direction opposition side) is fixed on the guide rod, so sealing portion can be positioned at the par of base pipe, and can not produce position skew or change of shape.Thereby, suitably set by shape and elastic characteristic, thereby sealing portion is closely contacted with the par of base pipe all the time the sealing of opposite side.Consequently, even when the base pipe is shaped, all the time pressure fluid is set to high pressure, can prevent that also pressure fluid from leaking into the outside of shaping direction opposition side.
Be expanded in the shape method the crowded of aforesaid a second aspect of the present invention, even when the base pipe is shaped, all the time pressure fluid is set to high pressure, can prevent that also pressure fluid from leaking into the outside, therefore need not the amount of hydraulic pressure deficiency is replenished, also need not to make hydraulic pressure between high pressure and low pressure, to switch, therefore can high pressure and carry out the shaping of base pipe at high speed.In addition,, therefore improved formalize shape stability on the mould of base pipe, consequently, can improve the precision that expander is shaped, thereby can prevent that product from producing deviation because pressure fluid can remain high pressure.
In addition, because the hollow stem that moves when the base pipe is shaped is only born from the end of shaping direction opposition side across the hydraulic pressure that sealing applied of a side, therefore, all bear the existing situation of hydraulic pressure with the whole outer peripheral face of bar and compare, the hydraulic pressure that hollow stem is born diminishes.Thus, owing to can reduce to be used for controlling the required power in position of hollow stem, therefore can realize travel mechanism's miniaturization of hollow stem.And then, because the pressure fluid supply port is formed on the guide rod that is fixed in the mould, therefore can in this guide rod, form the pressure fluid feed path that leads to the pressure fluid supply port.Thereby, compare with the existing situation that forms the pressure fluid feed path in the bar that when the base pipe is shaped, moves, can constitute the pressure fluid feed path simply.Can reduce cost by above invention.
The crowded shape method that is expanded into of a second aspect of the present invention can adopt various structures.For example can constitute: guide rod is made of large-diameter portion and minor diameter part integrally formed with large-diameter portion and that diameter is littler than large-diameter portion, large-diameter portion is used for fixing the sealing of opposite side, minor diameter part is along the sealing of axial lead one side of base pipe, hollow stem is configured to and can moves around minor diameter part, and the pressure fluid supply port is formed at large-diameter portion.In this form,, therefore can when the base pipe is shaped beginning, the sealing of one side and the end that is positioned at the minor diameter part side of this large-diameter portion be connected because the pressure fluid supply port is formed at the large-diameter portion of guide rod.Thereby, can be easily when the base pipe is shaped beginning the initial position of a side seals be positioned.
The crowded shape method that is expanded into of a second aspect of the present invention can be applied to crowded being expanded in the shape device.That is, the crowded shape device that is expanded into of a second aspect of the present invention is characterised in that, this squeezes and is expanded into the shape device and comprises: mould, and it has the inner surface configuration that is alternately formed by a plurality of mountain portions and paddy portion, and disposes the base pipe at this mould inside; Bar, it is located at the inside of base pipe; And a pair of sealing, it is to sealing between described base pipe and the described bar, and make the pressure fluid supply port between this is to sealing, bar constitutes by being fixed in the mould and having the guide rod of pressure fluid supply port and be disposed at guide rod hollow stem on every side movably, the seal portion configurations of one side is become axially being guided by guide rod along the base pipe, and the sealing of opposite side is fixed on the guide rod, the base pipe is being applied axial compression stress, and from the pressure fluid supply port in the base pipe supply pressure liquid time, hollow stem is moved vertically, thereby the base pipe is configured as the inner surface configuration of mould, when the base pipe is shaped, under the hydraulic action of pressure fluid, the sealing of one side is pushed towards the end of the shaping direction opposition side of hollow stem and strain is taken place, thereby make sealing portion can follow the expansion of base pipe, and control the position of the sealing of a side by moving of hollow stem.A second aspect of the present invention crowded is expanded into the shape device can access crowded identical effect of shape method and the effect of being expanded into above-mentioned second aspect.
In addition, the crowded shape device that is expanded into of a second aspect of the present invention can adopt various structures.For example can constitute: guide rod is made of large-diameter portion and minor diameter part integrally formed with large-diameter portion and that diameter is littler than large-diameter portion, large-diameter portion is used for fixing the sealing of opposite side, minor diameter part is along the sealing of axial lead one side of base pipe, hollow stem is configured to and can moves around minor diameter part, and the pressure fluid supply port is formed at large-diameter portion.In this form, can access crowded effect and the effect that is expanded into the homomorphosis of shape method with above-mentioned second aspect.
Be expanded into shape method or the crowded shape device that is expanded into according to of the present invention squeezing, even when the base pipe is shaped, all the time pressure fluid is set to high pressure, can prevent that also pressure fluid from leaking into the outside, therefore need not the amount of hydraulic pressure deficiency is replenished, hydraulic pressure is switched between high pressure and low pressure, therefore can high pressure and carry out the shaping of base pipe at high speed.In addition,, therefore improved formalize shape stability on mould of base pipe, consequently, can improve the precision that expander is shaped, thereby can prevent that product from producing deviation because pressure fluid can remain high pressure.
Description of drawings
Fig. 1 illustrates the described sectional view that squeezes the summary structure that is expanded into the shape device of first embodiment of the present invention.
Fig. 2 A～Fig. 2 C shows and adopts crowded crowded each operation that is expanded into the shape method that is expanded into the shape device shown in Figure 1, Fig. 2 A is the 3rd mountain portion that the base pipe is shown crowded sectional view that is expanded into the summary structure of shape device when being shaped, Fig. 2 B is the crowded sectional view that is expanded into the summary structure of shape device after the 3rd mountain portion that the base pipe is shown is shaped, and Fig. 2 C is the 4th mountain portion that the base pipe the is shown crowded sectional view that is expanded into the summary structure of shape device when being shaped.
Fig. 3 illustrates the described sectional view that squeezes the summary structure that is expanded into the shape device of second embodiment of the present invention.
Fig. 4 illustrates to adopt the crowded crowded sectional view that is expanded into the operation of shape method that is expanded into the shape device shown in Figure 3.
Fig. 5 illustrates the described sectional view that squeezes the summary structure that is expanded into the shape device of the 3rd embodiment of the present invention.
Fig. 6 illustrates to adopt the crowded crowded sectional view that is expanded into the operation of shape method that is expanded into the shape device shown in Figure 5.
Fig. 7 illustrates the existing sectional view that squeezes the summary structure that is expanded into the shape device.
Fig. 8 A and Fig. 8 B show crowded crowded each operation that is expanded into the shape method that is expanded into the shape device that adopts Fig. 7, Fig. 8 A is the crowded sectional view that is expanded into the summary structure of shape device after second mountain portion that the base pipe is shown is shaped, and Fig. 8 B is the crowded sectional view that is expanded into the summary structure of shape device that illustrates when in order to form the 3rd mountain portion bar being moved.
Fig. 9 A～Fig. 9 D shows crowded another crowded each operation that is expanded into the shape method that is expanded into the shape device that adopts Fig. 7, Fig. 9 A is the crowded sectional view that is expanded into the summary structure of shape device after first mountain portion that the base pipe is shown is shaped, Fig. 9 B is second preceding crowded sectional view that is expanded into the summary structure of shape device of mountain portion shaping that the base pipe is shown, Fig. 9 C is the crowded sectional view that is expanded into the summary structure of shape device after second mountain portion that the base pipe is shown is shaped, and Fig. 9 D is the crowded sectional view that is expanded into the summary structure of shape device before the 3rd mountain portion that the base pipe is shown is shaped.
The specific embodiment
(A) first embodiment
The structure of (1) first embodiment
Below, with reference to accompanying drawing first embodiment of the present invention is described.Fig. 1 illustrates the described sectional view that squeezes the summary structure that is expanded into shape device 100 of first embodiment of the present invention.Figure 1 illustrates the structure of squeezing the first half that is expanded into shape device 100.In addition, in the present embodiment, the inscape identical with Fig. 7 is marked with same-sign, and omits its explanation.
Be formed with pressure fluid in the inside of bar 130 and supply with stream 131, from here by pressure fluid supply port 131A supply pressure liquid L between base pipe 2 and bar 130.Be formed with a pair of groove 132,133 on the peripheral surface of bar 130, pressure fluid supply port 131A is between this is to groove.In groove 132,133, dispose a pair of annular seal portion 140,150 to sealing between base pipe 2 and the bar 130.In the present embodiment and since base pipe 2 when being shaped the moving direction of bar 130 be towards the right side, so sealing 140 is the sealing of shaping direction side of the present invention, sealing 150 is the sealing of shaping direction opposition side of the present invention.
Sealing 140,150 for example has elasticity.Sealing 140 is by contacting on complete cycle and this place is sealed with left lateral sides portion with the right side side surface part of groove 132 inner surfaces.The interval of sealing 140 and pressure fluid supply port 131A preferably is set to the amount of half mountain portion.This situation at sealing 140 during by the position corresponding with the 11B of paddy portion of mould 10, can make pressure fluid supply port 131A arrive the corresponding position of central portion with the 11A of mountain portion of mould 10.Interval between the sealing 140,150 is set to the distance of amount of two mountain portions of the bellows-shaped 11 that for example is mould 10.The axial length of sealing 150 is set to the distance of amount of a mountain portion of the bellows-shaped 11 of mould 10.Under this situation, suitably set by shape and elastic characteristic to sealing 150, can make sealing 150 when base pipe 2 is shaped all the time with the good paddy portion of the shaping of the par of base pipe and base pipe in the either party closely contact.In addition, interval between the 11A of mountain portion, 11A is not under the equally spaced situation, make between the sealing 140,150 the interval promptly the distance of the amount of two mountain portions form maximum distance in total distance of adjacent two mountain portions, the axial length that the makes sealing 150 i.e. distance of the amount of a mountain portion forms ultimate range in the distance of amount of a mountain portion.
Be formed with in the inside of bar 130 and connect pressure fluid and supply with the hydraulic pressure of stream 131 and groove 132 and apply stream 134, via hydraulic pressure apply stream 134 along from bar 130 towards the direction of base pipe 2 to the exert pressure hydraulic pressure of liquid L of sealing 140.Thus, sealing 140 can followed the expansion of base pipe when base pipe 2 is shaped.In this case, suitably set by shape and elastic characteristic, the hydraulic pressure of pressure fluid L and the translational speed of bar 130 etc. sealing 140, so that can contact with base pipe 2 with the upper end of bar 130 state of contact lower seal portions 140, thereby at least a portion of sealing 140 is closely contacted all the time with base pipe 2 in the bottom of sealing 140.
The action of (2) first embodiments
Then, with reference to accompanying drawing to describing based on squeezing the crowded shape method that is expanded into be expanded into shape device 100.In addition, the moving direction of illustrated arrow indication rod 130 in the bar 130 of Fig. 2 A～Fig. 2 C.
As shown in Figure 1, the left part and the butt mould 20 of base pipe 2 are connected, apply compression stress F from the right part of base pipe 2 to axial left side, simultaneously in the zone that seals by a pair of sealing 140,150, from pressure fluid supply port 131A supply pressure liquid L in base pipe 2.Under this state, by bar 130 is moved to axial right side (shaping direction), when pressure fluid supply port 131A arrived the corresponding position of the 11A of mountain portion with mould 10, base pipe 2 expanded along with the shape of the 11A of mountain portion of mould 10 under the effect of pressure fluid L.Like this, by making base pipe 2, thereby base pipe 2 expanders are configured as inner surface configuration corresponding shape with mould 10 from 11A of portion and the 11B of paddy portion of coming out of retirement and taking up an official post that begin to be shaped singly successively of moving direction (shaping direction) opposition side with bar 130.
In such expander is shaped, to a pair of sealing 140,150 that seals between base pipe 2 and the bar 130 not only when the mountain of base pipe 2 2A of is shaped, and, also can closely contact with base pipe 2 when between their next mountain 11A of portion when mobile at this 2A of mountain portion and mould 10.For example shown in Fig. 2 A, after second 2A of mountain portion of base pipe 2 was shaped, the sealing 140 of shaping direction side was during by the position corresponding with the 3rd 11A of mountain portion of mould 10, and base pipe 2 expands along with the shape of the 11A of this mountain portion under the effect of pressure fluid L.
Wherein, in the present embodiment, by along from bar 130 towards the direction of base pipe 2 to the sealing 140 of the shaping direction side hydraulic pressure of liquid L of exerting pressure, thereby can make sealing 140 follow the expansion of base pipe 2.Thereby, suitably set by shape and elastic characteristic, the hydraulic pressure of pressure fluid L and the translational speed of bar 130 etc. sealing 140, so that when sealing 140 is being followed expansion, and under the bottom and bar 130 state of contact of sealing 140, the upper end of sealing 140 can be contacted with base pipe 2, thereby shown in Fig. 2 A, at least a portion of the sealing 140 of shaping direction side is closely contacted all the time with base pipe 2.Consequently, even when base pipe 2 is shaped, all the time pressure fluid L is set to high pressure, can prevent that also pressure fluid from leaking into shaping direction side outside.
Then, shown in Fig. 2 B, after the 3rd 2A of mountain portion of base pipe 2 is shaped, the sealing 140 of shaping direction side by with the 3rd the paddy portion corresponding position of 11B of mould 10.Wherein, in the present embodiment, the interval between the sealing 140,150 is set to the distance of amount of at least two mountain portions of the inner surface configuration of mould 10.Thus, shown in Fig. 2 B, at the sealing 140 of shaping direction side during by the position corresponding with the 3rd 11B of paddy portion of mould 10, the sealing 150 of shaping direction opposition side by with first paddy portion corresponding position of 2B of base pipe 2.
In addition, the axial length of the sealing 150 of shaping direction opposition side is set to the distance of amount of at least one mountain portion of the inner surface configuration of mould 10.Thus, shown in Fig. 2 B, the both ends of the sealing 150 of shaping direction opposition side by with the corresponding position of foot (2B of first paddy portion of the par of the left part of base pipe 2 and base pipe 2) of first 2A of mountain portion both end sides.Thereby, suitably set by shape and elastic characteristic the sealing 150 of shaping direction opposition side, sealing portion 150 is closely contacted with the foot of first 2A of mountain portion both end sides all the time.Consequently, even when base pipe 2 is shaped, all the time pressure fluid L is set at high pressure, can prevent that also pressure fluid from leaking into the outside of shaping direction opposition side.
Then, shown in Fig. 2 C, when the sealing 140 of shaping direction side after the 3rd 2A of mountain portion of base pipe 2 is shaped, during by the position corresponding with the 4th 11A of mountain portion of mould 10, base pipe 2 expands along with the shape of the 11A of this mountain portion under the effect of pressure fluid L.In this case, owing to carry out the action identical, therefore at least a portion of sealing portion 140 is closely contacted all the time with base pipe 2 with Fig. 2 A at the sealing 140 of shaping direction side.Consequently, even when base pipe 2 is shaped, all the time pressure fluid L is set at high pressure, can prevent that also pressure fluid from leaking into shaping direction side outside.
In the present embodiment, when being shaped and in this shapings by N 2A of mountain portion at base pipe 2 afterwards when the next mountain 11A of portion of mould 10 moves, carry out the action of sealing 140,150 recited above repeatedly, a pair of sealing 140,150 is closely contacted with base pipe 2 when being shaped all the time.Thus, even when base pipe 2 is shaped, all the time pressure fluid L is set at high pressure, can prevent that also pressure fluid from leaking into the outside.Thereby, need not the amount of hydraulic pressure deficiency is replenished, also need not to make hydraulic pressure between high pressure and low pressure, to switch, therefore can high pressure and carry out the shaping of base pipe 2 at high speed.In addition,, therefore improved formalize shape stability on the mould 10 of base pipe 2, consequently, can improve the precision that expander is shaped, thereby can prevent that product from producing deviation because pressure fluid L can remain high pressure.
And then, because the zone that is supplied to pressure fluid L is not to be the corresponding whole zone of the inner surface configuration with mould 10 between base pipe 2 and the bar 130, and only between base pipe 2 and the bar 130 by a pair of sealing 140,150 zones that sealed, therefore can realize the miniaturization of the fixture of fixed mould 10, can reduce cost thus.The crowded shape method that is expanded into so preferably is applicable to thin-walled base pipe.
Especially, when pressure fluid supply port 131A arrives the central portion of the 11A of mountain portion of mould 10, moving of temporary transient locking lever 130, carry out the shaping of the 11A of mountain portion of the mould 10 directly over the pressure fluid supply port 131A, even thereby under the thicker situation of the wall thickness of base pipe 2, also can carry out this shaping reliably according to the inner surface configuration 11 of mould 10.
(B) second embodiment
The structure of (1) second embodiment
Below, with reference to accompanying drawing second embodiment of the present invention is described.Fig. 3 illustrates the described sectional view that squeezes the summary structure that is expanded into shape device 200 of second embodiment of the present invention.In addition, in second embodiment, the structural element identical with Fig. 7 is marked with same-sign, and omits its explanation.
Inside at base pipe 2 is provided with bar 230 vertically.Bar 230 is made of guide rod of fixing with respect to base pipe 2 235 and the hollow stem 236 that is disposed at movably around the guide rod 235.Guide rod 235 has large-diameter portion 235A and the diameter minor diameter part 235B littler than large-diameter portion 235A.The left part of large-diameter portion 235A is fixed on the butt mould 20.The right part of minor diameter part 235B and large-diameter portion 235A is integrally formed, and extends to axial right side.Hollow stem 236 is disposed between base pipe 2 and the minor diameter part 235B, can with minor diameter part 235B sliding-contact.
Be formed with pressure fluid in the inside of bar 230 and butt mould 20 and supply with stream 231, and pass through pressure fluid supply port 231A supply pressure liquid L between base pipe 2 and bar 230 from this stream.Pressure fluid supply port 231A is formed at the surface of minor diameter part 235B.In second embodiment,, therefore pressure fluid recovery stream can be set also owing to when expander is shaped, do not need to pressure recovery liquid L as described as follows.On the peripheral surface of large-diameter portion 235A, be formed with groove 233.
Between base pipe 2 and bar 230, dispose sealing 240 (side seals) and sealing 250 (opposite side sealing) that they are sealed.Sealing 240 in the form of a ring, and be configured to can with the peripheral surface sliding-contact of minor diameter part 235B.Sealing 240,250 has elasticity.In second embodiment and since base pipe 2 when being shaped the moving direction of hollow stem 236 be the right side, so sealing 240 is the sealing of shaping direction side, sealing 250 is the sealing of shaping direction opposition side.
Under the hydraulic action that supplies to the pressure fluid L between base pipe 2 and the bar 230, sealing 240 is pushed towards the left part of hollow stem 236 and strain is taken place, and the position of sealing 240 is controlled by the mobile of hollow stem 236.Such sealing 240 is under pressure pushing of liquid L and compresses in the axial direction and vertically expansion, therefore can follow the expansion of base pipe 2.In this case, be the left part of hollow stem 236 because sealing 240 is disposed at the expansion starting position of base pipe 2, so sealing 240 is being followed the expansion of base pipe 2 easily.In this case, suitably set, at least a portion of sealing 240 is closely contacted with base pipe 2 all the time by shape and elastic characteristic, the hydraulic pressure of pressure fluid L and the translational speed of hollow stem 236 etc. to sealing 240.The initial position of sealing 240 is set to the position near the 11B of paddy portion between first 11A of mountain portion left part of hollow stem 236, for example mould 10 and second 11A of mountain portion.In addition, sealing 240 also can be fixed on the left part of hollow stem 236 by bonding grade.
Sealing 250 and is fixed in the groove 233 in the form of a ring.In this case, suitably set, sealing 250 is closely contacted with the par of the left part of base pipe 2 all the time by shape and elastic characteristic to sealing 250.
The action of (2) second embodiments
Then, mainly with reference to Fig. 4 to describing based on squeezing the crowded shape method that is expanded into that is expanded into the shape device.
As shown in Figure 4, the left part of base pipe 2 is connected on the butt mould 20, and apply compression stress F to axial left side from the right part of base pipe 2, simultaneously in by a pair of sealing 240,250 zones that sealed, from pressure fluid supply port 231A supply pressure liquid L in base pipe 2.Under this state, by hollow stem 236 is moved to axial right side (direction of arrow among the figure), make that when pressure fluid L supplies to the corresponding position of the 11A of mountain portion with mould 10 base pipe 2 expands along with the shape of the 11A of mountain portion of mould 10 under the effect of pressure fluid L.Like this, by make base pipe 2 from the moving direction opposition side (shaping direction opposition side) of hollow stem 236 beginning 2A of portion and the 2B of paddy portion of coming out of retirement and taking up an official post that be shaped singly successively, thereby base pipe 2 expanders are configured as bellows-shaped 11 corresponding shape with mould 10.
In such expander is shaped, under the hydraulic action that supplies to the pressure fluid L between base pipe 2 and the bar 230, the sealing 240 of shaping direction side is pushed towards the left part of hollow stem 236, therefore produce strain by the sealing 240 that makes shaping direction side because of pressure fluid L, thereby make sealing 240 can follow the expansion of base pipe 2.Thereby, by the shape of the sealing 240 of shaping direction side and hydraulic pressure of elastic characteristic and pressure fluid L etc. are suitably set, at least a portion of the sealing 240 of shaping direction side is closely contacted all the time with base pipe 2.
In addition, control the position of the sealing 240 of shaping direction side by moving of hollow stem 236, therefore the translational speed of hollow stem 236 can be controlled at more than the speed of expansion of base pipe 2, can make the sealing 240 of shaping direction side more lean on shaping direction side shifting to the expansion starting position of base pipe 2 with than this position all the time thus.Thus, the sealing 240 of shaping direction side is pushed by the left part of hollow stem 236 under the hydraulic action of above-mentioned pressure fluid L, so the elastic deformation amount increases.Thereby, because the sealing 240 of shaping direction side is being followed the expansion of base pipe 2 easily, therefore can further improve at least a portion of sealing 240 of shaping direction side and the tight contact of base pipe 2.Consequently, even when base pipe 2 is shaped, all the time pressure fluid L is set to high pressure, can prevent that also pressure fluid L from leaking into shaping direction side outside.
On the other hand, because the sealing 250 of shaping direction opposition side is fixed on the guide rod 235, so sealing portion 250 can be positioned at the par of base pipe 2, and can not produce position skew or change of shape.Thereby, suitably set by shape and elastic characteristic the sealing 250 of shaping direction opposition side, sealing portion 250 is closely contacted with the par of base pipe 2 all the time.Consequently, even when base pipe 2 is shaped, all the time pressure fluid L is set to high pressure, can prevent that also pressure fluid L from leaking into the outside of shaping direction opposition side.
In aforesaid second embodiment, even when base pipe 2 is shaped, all the time pressure fluid L is set to high pressure, can prevent that also pressure fluid L from leaking into the outside, therefore need not the amount of hydraulic pressure deficiency is replenished, also need not to make hydraulic pressure between high pressure and low pressure, to switch, therefore can high pressure and carry out the shaping of base pipe 2 at high speed.In addition,, therefore improved formalize shape stability on the mould 10 of base pipe 2, consequently, can improve the precision that expander is shaped, thereby can prevent that product from producing deviation because pressure fluid L can remain high pressure.
In addition, because the hollow stem 236 that moves when base pipe 2 is shaped is only born the hydraulic pressure that applies across the sealing 240 of shaping direction side from the left part, therefore compare with the existing situation that the whole outer peripheral face of bar all bears hydraulic pressure, the hydraulic pressure that hollow stem 236 is born diminishes.Thus, owing to can reduce to be used for controlling the required power in position of hollow stem 236, therefore can realize travel mechanism's miniaturization of hollow stem 236.And then, because pressure fluid supply port 231A is formed in the guide rod 235 that is fixed on the butt mould 20, therefore can in this guide rod 235, form the pressure fluid feed path 231 that leads to pressure fluid supply port 231A.Thereby, compare with the existing situation that forms the pressure fluid feed path in the bar that when the base pipe is shaped, moves, can constitute pressure fluid feed path 231 simply.Can reduce cost by above invention.
(C) the 3rd embodiment
Fig. 5 shows the described sectional view that squeezes the summary structure that is expanded into shape device 300 of the 3rd embodiment of the present invention.In the 3rd embodiment, the inscape identical with second embodiment is marked with same-sign, and omits explanation inscape with effect identical with second embodiment.In the 3rd embodiment, make pressure fluid supply port 231A be formed at the large-diameter portion 235A surface of guide rod 235, be formed at the minor diameter part 235B surface of guide rod 235 with replacement.The sealing 240 of the shaping direction side in the time of thus, can making base pipe 2 be shaped beginning is connected to the right part of large-diameter portion 235A.Thereby, can be easily when the base pipe is shaped beginning the initial position of the sealing 240 of shaping direction side be positioned.
In the 3rd such embodiment, behind the initial position of the sealing 240 of having set shaping direction side as described above, as shown in Figure 6, carry out the base pipe identical and be shaped, thereby can access effect and the effect identical with second embodiment with second embodiment.
Claims (8)
1. one kind is squeezed the shape method that is expanded into, mould has the inner surface configuration that is alternately formed by a plurality of mountain portions and paddy portion, dispose the base pipe at this mould inside, inside at described base pipe is provided with bar vertically, this bar has the pressure fluid supply port, and be provided with a pair of sealing that seals between described base pipe and the described bar, and make described pressure fluid supply port between this is to sealing
Described base pipe is applied described axial compression stress, and, described bar is moved axially along described, thereby make described base pipe be configured as the inner surface configuration of described mould, it is characterized in that from described pressure fluid supply port supply pressure liquid in described base pipe,
By along towards the direction of described base pipe the sealing of shaping direction side being applied the hydraulic pressure of described pressure fluid, thereby make described sealing can follow the expansion of described base pipe from described bar,
Interval between the described sealing is set to the distance of amount of at least two mountain portions of the inner surface configuration that is equivalent to described mould,
The described axial length of the sealing of described shaping direction opposition side is set to the distance of amount of at least one mountain portion of the inner surface configuration that is equivalent to described mould.
2. according to claim 1 squeezing is expanded into the shape method, it is characterized in that,
When described pressure fluid supply port arrives the central portion of mountain portion of described mould, temporarily stop to move of described bar, carry out the shaping of the mountain portion of the described mould directly over the described pressure fluid supply port.
3. one kind is squeezed and to be expanded into the shape device, and this squeezes and is expanded into the shape device and comprises: mould, and it has the inner surface configuration that is alternately formed by a plurality of mountain portions and paddy portion, and disposes the base pipe at this mould inside; Bar, it is provided with vertically in described base pipe inside, and has the pressure fluid supply port; And a pair of sealing, make described pressure fluid supply port between this is to sealing, and this to sealing to sealing between described base pipe and the described bar,
Described base pipe is applied described axial compression stress, and, described bar is moved axially along described, thereby make described base pipe be configured as the inner surface configuration of described mould, it is characterized in that from described pressure fluid supply port supply pressure liquid in described base pipe,
Should squeeze to be expanded into and be provided with hydraulic pressure in the shape device and apply stream, this hydraulic pressure applies stream and is used for along the hydraulic pressure that towards the direction of described base pipe the sealing of shaping direction side is applied described pressure fluid from described bar, sealing portion can follow the expansion of described base pipe under the effect of the hydraulic pressure that applies the pressure fluid that stream is applied in by described hydraulic pressure
Interval between the described sealing is set to the distance of amount of at least two mountain portions of the inner surface configuration that is equivalent to described mould,
The described axial length of the sealing of described shaping direction opposition side is set to the distance of amount of at least one mountain portion of the inner surface configuration that is equivalent to described mould.
4. according to claim 3 squeezing is expanded into the shape device, it is characterized in that,
When described pressure fluid supply port arrives the central portion of mountain portion of described mould, temporarily stop to move of described bar, carry out the shaping of the mountain portion of the described mould directly over the described pressure fluid supply port.
5. one kind is squeezed and to be expanded into the shape method, it is characterized in that,
Mould has the inner surface configuration that is alternately formed by a plurality of mountain portions and paddy portion, disposes the base pipe at this mould inside,
Inside at described base pipe is provided with bar, and described bar constitutes by being fixed in the described mould and having the guide rod of pressure fluid supply port and be disposed at described guide rod hollow stem on every side movably,
Be provided with a pair of sealing that seals between described base pipe and the described bar, and make described pressure fluid supply port between this is to sealing, the seal portion configurations of one side is become along axially being guided by described guide rod of described base pipe, and the sealing of opposite side is fixed on the described guide rod
Described base pipe is applied axial compression stress, and, described hollow stem is moved axially along described, thereby make described base pipe be configured as the inner surface configuration of described mould from described pressure fluid supply port supply pressure liquid in described base pipe,
When described base pipe is shaped, under the hydraulic action of described pressure fluid, the sealing of a described side is pushed towards the end of the shaping direction opposition side of described hollow stem and strain is taken place, thereby make sealing portion can follow the expansion of described base pipe, and control the position of the sealing of a described side by moving of described hollow stem.
6. according to claim 5 squeezing is expanded into the shape method, it is characterized in that,
Described guide rod is made of large-diameter portion and minor diameter part integrally formed with described large-diameter portion and that diameter is littler than described large-diameter portion,
Described large-diameter portion is used for fixing the sealing of described opposite side,
Described minor diameter part is along the sealing of the described side of the axial lead of described base pipe,
Described hollow stem is configured to and can moves around described minor diameter part,
Described pressure fluid supply port is formed at described large-diameter portion.
7. one kind is squeezed and to be expanded into the shape device, it is characterized in that,
Should crowded be expanded into the shape device comprises: mould, and it has the inner surface configuration that is alternately formed by a plurality of mountain portions and paddy portion, and has the base pipe at this mould inside; Bar, it is located at the inside of described base pipe; And a pair of sealing, it is to sealing between described base pipe and the described bar, and makes described pressure fluid supply port between this is to sealing,
Described bar constitutes by being fixed in the described mould and having the guide rod of described pressure fluid supply port and be disposed at described guide rod hollow stem on every side movably,
The seal portion configurations one-tenth of one side is axially guided by described guide rod along described base pipe, and the sealing of opposite side is fixed on the described guide rod,
Described base pipe is applied axial compression stress, and, described hollow stem is moved axially along described, thereby described base pipe is configured as the inner surface configuration of described mould from described pressure fluid supply port supply pressure liquid in described base pipe,
When described base pipe is shaped, under the hydraulic action of described pressure fluid, the sealing of a described side is pushed towards the end of the shaping direction opposition side of described hollow stem and strain is taken place, thereby make sealing portion can follow the expansion of described base pipe, and control the position of the sealing of a described side by moving of described hollow stem.
8. according to claim 7 squeezing is expanded into the shape device, it is characterized in that,
Described guide rod is made of large-diameter portion and minor diameter part integrally formed with described large-diameter portion and that diameter is littler than described large-diameter portion,
Described large-diameter portion is used for fixing the sealing of described opposite side,
Described minor diameter part is along the sealing of the described side of the axial lead of described base pipe,
Described hollow stem is configured to and can moves around described minor diameter part,
Described pressure fluid supply port is formed at described large-diameter portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008062263 | 2008-03-12 | ||
| JP2008062263A JP4981717B2 (en) | 2008-03-12 | 2008-03-12 | Bulge forming method and bulge forming apparatus |
| JP2008062277 | 2008-03-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101530876A true CN101530876A (en) | 2009-09-16 |
Family
ID=41101858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910128173 Pending CN101530876A (en) | 2008-03-12 | 2009-03-12 | Bulge forming method and bulge forming apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4981717B2 (en) |
| CN (1) | CN101530876A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103611768A (en) * | 2012-11-29 | 2014-03-05 | 重庆帆城科技有限公司 | Hydraulic forming technology of tube blank of small-sized corrugated tube and forming die sheet special for tube blank of small-sized corrugated tube |
| CN103962406A (en) * | 2014-05-05 | 2014-08-06 | 天津理工大学 | Extrusion-expansion combination mold for pipe formed by flow dividing mold |
| CN106031934A (en) * | 2015-03-17 | 2016-10-19 | 天津市东浩软管科技有限公司 | Stainless steel flexible pipe shaping process |
| CN106825186A (en) * | 2016-12-15 | 2017-06-13 | 北京卫星制造厂 | Thin-walled wave disc flexible forming apparatus and the method that thin-walled wave disc is manufactured using it |
| CN109834150A (en) * | 2019-01-08 | 2019-06-04 | 上海航天精密机械研究所 | More wave duct hydraulic expanding-forming forming devices and method |
| CN109967590A (en) * | 2017-12-27 | 2019-07-05 | 航天海鹰(哈尔滨)钛业有限公司 | A kind of titanium alloy U-shaped bellows differential temperature progressive forming method |
| CN112517727A (en) * | 2020-11-09 | 2021-03-19 | 哈尔滨工业大学 | Ultra-low temperature forming device and forming method for aluminum alloy deep cavity component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107876608A (en) * | 2017-12-20 | 2018-04-06 | 江门市冈州科技发展有限公司 | Gradual liquid is swollen former and the forming method using the equipment |
| CN108817194B (en) * | 2018-04-28 | 2020-04-28 | 河南孟电集团兴迪锻压设备制造有限公司 | Hydraulic preparation method of multi-elbow pipe |
| CN111974866B (en) * | 2020-07-27 | 2024-05-10 | 佛山市永恒液压机械有限公司 | Be used for fashioned mould of two card pressure pipes |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5677024A (en) * | 1979-11-30 | 1981-06-25 | Toshiba Corp | Formation of bellows |
| JPH1128539A (en) * | 1997-07-07 | 1999-02-02 | Mitsubishi Heavy Ind Ltd | Hydraulic tube expander |
| JP4647753B2 (en) * | 2000-06-27 | 2011-03-09 | 日本発條株式会社 | Metal bellows manufacturing equipment |
| JP4504519B2 (en) * | 2000-06-22 | 2010-07-14 | 株式会社オプトン | Bulge processing equipment |
| JP2005153005A (en) * | 2003-11-25 | 2005-06-16 | Kinji Ichikawa | Automatic hydraulic machine for manufacturing bellows |
-
2008
- 2008-03-12 JP JP2008062263A patent/JP4981717B2/en not_active Expired - Fee Related
-
2009
- 2009-03-12 CN CN 200910128173 patent/CN101530876A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103611768A (en) * | 2012-11-29 | 2014-03-05 | 重庆帆城科技有限公司 | Hydraulic forming technology of tube blank of small-sized corrugated tube and forming die sheet special for tube blank of small-sized corrugated tube |
| CN103611768B (en) * | 2012-11-29 | 2016-08-03 | 重庆帆城科技有限公司 | A kind of small bellows pipe hydroforming process and special molding module |
| CN103962406A (en) * | 2014-05-05 | 2014-08-06 | 天津理工大学 | Extrusion-expansion combination mold for pipe formed by flow dividing mold |
| CN103962406B (en) * | 2014-05-05 | 2016-06-29 | 天津理工大学 | A kind of divergent die shaping pipe squeezes swollen assembling die |
| CN106031934A (en) * | 2015-03-17 | 2016-10-19 | 天津市东浩软管科技有限公司 | Stainless steel flexible pipe shaping process |
| CN106031934B (en) * | 2015-03-17 | 2017-12-26 | 天津市东浩软管科技有限公司 | A kind of stainless steel flexible hose goes out shape technique |
| CN106825186A (en) * | 2016-12-15 | 2017-06-13 | 北京卫星制造厂 | Thin-walled wave disc flexible forming apparatus and the method that thin-walled wave disc is manufactured using it |
| CN106825186B (en) * | 2016-12-15 | 2019-05-24 | 北京卫星制造厂 | Thin-walled wave disc flexible forming apparatus and the method for manufacturing thin-walled wave disc using it |
| CN109967590A (en) * | 2017-12-27 | 2019-07-05 | 航天海鹰(哈尔滨)钛业有限公司 | A kind of titanium alloy U-shaped bellows differential temperature progressive forming method |
| CN109834150A (en) * | 2019-01-08 | 2019-06-04 | 上海航天精密机械研究所 | More wave duct hydraulic expanding-forming forming devices and method |
| CN112517727A (en) * | 2020-11-09 | 2021-03-19 | 哈尔滨工业大学 | Ultra-low temperature forming device and forming method for aluminum alloy deep cavity component |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4981717B2 (en) | 2012-07-25 |
| JP2009214154A (en) | 2009-09-24 |
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