CN111014417B - Flanging type pipe liquid filling forming sealing device and method - Google Patents
Flanging type pipe liquid filling forming sealing device and method Download PDFInfo
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- CN111014417B CN111014417B CN201911366061.9A CN201911366061A CN111014417B CN 111014417 B CN111014417 B CN 111014417B CN 201911366061 A CN201911366061 A CN 201911366061A CN 111014417 B CN111014417 B CN 111014417B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
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Abstract
The invention discloses a flanging type pipe hydro-forming sealing device and a method, comprising two sealing punches which are respectively used for sealing two ends of a pipe blank, wherein each sealing punch comprises an inner punch, an outer punch and a restriction ring; the head end surface of the inner punch is a conical surface, and the outer punch is sleeved outside the inner punch; the outer punch comprises an outer punch seat, an outer punch sealing head and a sealing insert, and the outer punch seat is sleeved outside the inner punch; the head ends of the inner cavities of the outer punch sealing head and the sealing insert are conical cavities; when in sealing, the pipe end is inserted into the gap between the front ends of the inner punch and the outer punch, the conical surface of the inner punch is pressed into the end surface of the pipe blank to realize rigid flaring, and the gap is continuously reduced along with the increase of the insertion depth of the pipe blank, and the pipe end is tightly attached to the sealing sections of the inner punch and the outer punch to realize self sealing of the pipe end; effective sealing can be realized in internal high-pressure forming and pipe liquid filling pressing, and sealing of pipes with different diameters and different wall thicknesses can be realized by adjusting the number of sealing insert blocks of the outer punch and the clearance between the outer punch and the inner punch.
Description
Technical Field
The invention relates to the technical field of metal pipe forming, in particular to a flanging type pipe hydro-forming sealing device and method.
Background
With the demand of lightweight technology in the fields of aerospace, automobiles and the like, hollow special-shaped variable cross-section pipe fittings are increasingly widely applied to replace solid components.
The pipe hydro-forming technology developed under the background is an advanced forming technology for manufacturing hollow special-shaped variable cross-section pipe fittings, and is rapidly developed and applied. According to different orders of die assembly and liquid filling, the method can be divided into two modes of internal high-pressure forming and pipe liquid filling pressing. The internal high pressure forming is that the pipe is put in a mould, then high pressure liquid is filled into the pipe, and the pipe is deformed and is jointed with a mould cavity to form the required shape under the action of the high pressure liquid. The pipe is filled with low-pressure liquid, and then the pipe deforms under the combined action of the support of the liquid medium in the pipe and the mechanical extrusion of the die. Whether the internal high-pressure forming or the pipe liquid-filling pressing forming is carried out, the internal high-pressure forming or the pipe liquid-filling pressing forming is realized in a pipe liquid-filling mode, certain liquid pressure needs to be established in the pipe, and the pipe end needs to be sealed firstly.
The internal high-pressure forming generally adopts conical punch flaring sealing or O-shaped rubber ring sealing, both sealing modes need to provide external restraint of the pipe end by depending on a die cavity, corresponding structures need to be processed inside the die for matching, and the complexity of the die is increased. However, for pipes with different diameters and thicknesses, sealing punches with corresponding sizes are required, and at present, no universal structure is available for complete coverage, which causes the problems of material waste, long replacement and adjustment period, low production efficiency, increased cost and the like.
The end part of the pipe blank needs to be sealed before the mould is closed, and the mould cannot provide external constraint for the pipe blank because the mould is not closed, so that the sealing structure can be sealed only by an external constraint structure with a pipe end.
The internal high-pressure forming and the pipe liquid-filling pressing have the same advantages and the differences, the advantages of the internal high-pressure forming and the pipe liquid-filling pressing are complementary, and sometimes, in order to ensure the smooth forming of a product, the rapid switching between the internal high-pressure forming and the pipe liquid-filling pressing is required. Therefore, in order to improve the interchangeability of the internal high-pressure forming and the pipe liquid-filling pressing and avoid frequent replacement of the sealing device, a new sealing mode and a new sealing device are urgently needed, the universality of the internal high-pressure forming sealing device can be solved, the sealing device is suitable for pipe forms with different diameters and different thicknesses, and the pipe end restriction limitation of the pipe liquid-filling pressing can be solved.
Disclosure of Invention
The invention aims to provide a flanging type pipe liquid-filling forming sealing device and method, which are used for solving the problems in the prior art and can realize the self-sealing of pipe ends of pipes with different diameters and different thicknesses in the internal high-pressure forming and the pipe liquid-filling pressing.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a flanging type pipe hydro-forming sealing device and a method, comprising two sealing punches which are respectively used for sealing two ends of a pipe blank, wherein each sealing punch comprises an inner punch, an outer punch and a restriction ring;
the inner punch comprises a connecting section and a sealing section, the head end face of the sealing section is a conical surface, the connecting section of the inner punch is connected with the outer punch, and a liquid filling channel is arranged in the inner punch and is used for filling high-pressure liquid into the tube blank;
the outer punch comprises an outer punch seat, an outer punch sealing head and a sealing insert, and the outer punch seat is sleeved outside the inner punch and connected with the inner punch; the outer punch sealing head is arranged at the head end of the outer punch base and comprises two semi-cylinders which are oppositely arranged, and the two semi-cylinders are hinged with the outer punch base and can be opened or spliced in a rotating mode; the sealing insert is a plurality of semi-circular sheets which are sequentially overlapped and are respectively arranged at the head end of the semi-cylinder; the tail ends of the inner cavities of the outer punch sealing head and the sealing insert in a splicing state are cylindrical cavities with fixed diameters, the head ends of the outer punch sealing head and the sealing insert are conical cavities with gradually reduced diameters, and the included angle between the conical surface of each conical cavity and the horizontal direction is smaller than the included angle between the conical surface of the head end of the inner punch and the horizontal direction;
the constraint ring is sleeved outside the outer punch and is in sliding connection with the outer punch, and the constraint ring is used for constraining the outer punch sealing head and the sealing insert in a splicing state.
Preferably, the outer punch seat is connected with the inner punch through an adjusting bolt; the top and the bottom of the outer punch seat are respectively provided with a rectangular step groove, the top and the bottom of the connecting section of the inner punch are opposite to each other and are respectively provided with two first threaded holes, the top of the adjusting bolt is clamped at the step of the rectangular step groove, and the bottom of the adjusting bolt is connected in the first threaded holes.
Preferably, two of the semi-cylinders are hinged by a rotating shaft.
Preferably, the outer punch holder is further provided with a driving oil cylinder, a telescopic rod of the driving oil cylinder is connected with the constraint ring, and the inner side of the constraint ring is further provided with two grooves which are respectively opposite to the two rotating shafts.
Preferably, the seal insert and the outer punch seal head are fixed by bolts.
Preferably, the included angle between the conical surface of the head end of the inner punch and the horizontal direction is 30-60 degrees.
Preferably, the included angle between the conical surface of the conical cavity and the horizontal direction is 30-60 degrees.
The invention also provides a flanging type pipe liquid filling forming sealing method, which comprises the following steps:
the method comprises the following steps: installing a sealing insert on the outer punch sealing head according to the diameter of the tube blank, adjusting the conical surface gap between the conical surface in the cavity at the head end of the outer punch and the conical surface at the head end of the inner punch according to the thickness of the tube blank tube wall, and respectively installing the two sealing punches on punch slide rails at the two ends of the tube blank;
step two: placing the tube blank at a set position, driving a restraint ring to move to the head end of an outer punch by a driving oil cylinder, restraining a sealing insert, and enabling two sealing punches to move forwards under the pushing action of oil cylinders at two sides respectively to realize sealing of the end part of the tube blank;
step three: the control system controls the press and the supercharger to realize the forming process;
step four: and (4) releasing pressure, driving the oil cylinder to drive the restraint ring to move to the tail end of the outer punch, enabling the restraint of the sealing insert to disappear, withdrawing the left and right sealing punches, and resetting the upper die to obtain the required workpiece.
Preferably, in the step one, of the plurality of seal inserts mounted on the outer punch seal head, the inner diameter of a first seal insert is larger than the outer diameter of the tube blank, the head end gap width of the conical surface gap between the outer punch and the inner punch is larger than the wall thickness of the tube blank, and the tail end gap width is smaller than the wall thickness of the tube blank.
Preferably, in the third step, when the pipe is formed by internal high pressure, the forming process is as follows: the driving device pushes the upper die to move downwards to be matched with the die, and the supercharger flushes a high-pressure liquid medium into the tube blank from a liquid filling channel of the sealing punch at one end; when the pipe is formed by liquid filling and pressing, the forming process is as follows: the booster flushes high-pressure liquid medium into the pipe blank from the liquid filling channel of the sealing punch at one end, the driving device pushes the upper die to move downwards to be matched, and the sealing punch moves downwards along with the pipe blank.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the invention provides a flanging type pipe hydro-forming sealing device and a method, the device comprises an inner punch, an outer punch, a small driving oil cylinder, a restriction ring and other structures, when in sealing, a pipe end is inserted into a gap between the front ends of the inner punch and the outer punch, the conical surface of the inner punch is pressed into the end surface of a pipe blank to realize rigid flaring, the gap is continuously reduced along with the increase of the insertion depth of the pipe blank, the pipe end is tightly attached to the sealing section of the inner punch and the outer punch to realize self sealing of the pipe end, the structure is simple, the dependence of a sealing structure on a main body die is eliminated, and effective sealing can be realized in inner high-.
2. According to the flanging type pipe hydro-forming sealing device and method, the sealing of pipes with different diameters and different wall thicknesses can be realized by adjusting the number of the outer punch sealing insert blocks and the gap between the outer punch and the inner punch.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic perspective view of a flanging-type tube hydroforming sealing device according to the present invention;
FIG. 2 is a schematic perspective view of the relationship between the position of the punch and the position of the retainer ring when the flanging-type tube filling forming sealing device of the present invention is sealed;
FIG. 3 is a schematic perspective view of the sealing end state of the flanging type tube hydroforming sealing device according to the present invention;
FIG. 4 is an exploded view of the flanged tube hydroforming seal of the present invention;
FIG. 5 is a schematic view of the assembled position relationship between the flanging type tube hydroforming sealing device and the first tube blank according to the present invention;
FIG. 6 is a schematic view showing the positional relationship between the flanged tube hydroforming seal and the second tube blank assembly according to the present invention;
FIG. 7 is a schematic view showing the positional relationship between the turn-up type tube hydroforming sealing device and a third tube blank in accordance with the present invention;
in the figure: 1-inner punch, 2-liquid filling channel, 3-first threaded hole, 4-head end face of sealing section, 5-adjusting bolt, 6-rectangular step groove, 7-outer punch seat, 8-restraining ring, 9-groove, 10-sealing insert, 11-second threaded hole, 12-bolt, 13-outer punch sealing head, 14-rotating shaft, 15-driving oil cylinder, 16-tube blank and 17-outer punch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a flanging type pipe hydro-forming sealing device and a flanging type pipe hydro-forming sealing method, which are used for solving the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The embodiment provides a flanging type pipe liquid-filling forming sealing device, which comprises two sealing punches respectively used for sealing two ends of a pipe blank 16, wherein the sealing punches comprise an inner punch 1, an outer punch 17 and a restraint ring 8;
the inner punch 1 comprises a connecting section and a sealing section, the head end face 4 of the sealing section is a conical surface, the included angle between the conical surface and the horizontal direction is 30-60 degrees, and when the tube blank 16 is sealed, the conical surface is pressed into the end face of the tube blank 16 to realize rigid flaring sealing; the connecting section of the inner punch 1 is connected with the outer punch 17, and a liquid filling channel 2 is arranged in the inner punch 1 and is used for filling high-pressure liquid into the tube blank 16;
the outer punch 17 comprises an outer punch seat 7, an outer punch sealing head 13 and a sealing insert 10; the outer punch head seat 7 is sleeved outside the inner punch head 1 and connected with the inner punch head 1; the outer punch sealing head 13 is arranged at the head end of the outer punch base 7 and comprises two semi-cylinders which are oppositely arranged, and the two semi-cylinders are hinged with the outer punch base 7 through a rotating shaft 14, so that the outer punch sealing head 13 can be opened or spliced in a rotating manner, and the tube blank 16 can be conveniently taken out after sealing is finished; the sealing insert 10 is a plurality of sequentially overlapped semicircular plates which are respectively arranged at the head ends of the semicylindrical bodies, the outer diameters of the plurality of sealing inserts 10 are equal to the outer diameter of the outer punch seat 7, the inner diameter is gradually reduced, the tail end of an inner cavity formed by the outer punch sealing head 13 and the sealing insert 10 in a splicing state is a cylindrical cavity with a fixed diameter, the head end is a conical cavity with a gradually reduced diameter, the included angle between the conical surface of the conical cavity and the horizontal direction is 30-60 degrees and smaller than the included angle between the conical surface of the head end of the inner punch 1 and the horizontal direction, so that the clearance between the inner punch 1 and the outer punch 17 is continuously reduced along with the increase of the depth of the tube blank 16 inserted into the inner punch 1 and the outer punch 17, and the tube end is tightly attached to the sealing sections of the; the seal insert 10 can be matched according to the thickness of the tube blank 16 in use.
In the embodiment, the constraint ring 8 is sleeved outside the outer punch 17 and is in sliding connection with the outer punch 17, and the constraint ring 8 is used for constraining the outer punch sealing head 13 and the sealing insert 10 in a split state; specifically, the outer punch seat 7 is further provided with a driving oil cylinder 15, the driving oil cylinder 15 is a small-sized driving oil cylinder, and a telescopic rod of the driving oil cylinder 15 is connected with the restraint ring 8 to provide power for the restraint ring 8 to move back and forth; two grooves 9 are further formed in the inner side of the restraint ring 8, and the two grooves 9 are respectively opposite to the two rotating shafts 14, so that the restraint ring 8 does not interfere with the rotating shafts 14 on the outer punch when moving.
In the present embodiment, the outer punch seat 7 is connected to the inner punch 1 through the adjusting bolt 5; the top and the bottom of outer punch holder 7 are provided with a rectangle step groove 6 respectively, two rectangle step grooves 6 symmetry sets up, the top and the bottom of the linkage segment of relative interior drift 1 respectively set up two first screw hole 3, the top joint of adjusting bolt 5 is in the step department of rectangle step groove 6, the bottom of adjusting bolt 5 is connected in first screw hole 3, link to each other with interior drift 1 through bolt 12, can change the relative position between interior drift 1 and the outer drift 17 through adjusting bolt 5 in the position of rectangle step groove 6, thereby change the conical surface clearance of outer drift 17 and interior drift 1 head end.
In this embodiment, a second threaded hole 11 opposite to the threaded hole of the outer punch sealing head 13 is formed in the seal insert 10, and the seal insert 10 and the outer punch sealing head 13 are fixed by screwing a bolt 12 into the threaded hole.
Based on the flanging type pipe liquid-filling forming sealing device, the embodiment also provides a flanging type pipe liquid-filling forming sealing method, which specifically comprises the following steps:
the method comprises the following steps: installing an outer punch 17 sealing insert 10 on an outer punch sealing head 13 according to the diameter of a tube blank 16, adjusting a conical surface gap between an intracavity conical surface at the head end of the outer punch 17 and a conical surface at the head end of the inner punch 1 according to the thickness of the tube wall of the tube blank 16, and respectively installing two sealing punches on punch slide rails (not shown in the figure) at two ends of the tube blank 16, wherein the punch slide rails ensure that the sealing punches can realize vertical displacement;
step two: placing a tube blank 16 at a set position, driving a restraint ring 8 to move to the head end of an outer punch 17 by a driving oil cylinder 15, restraining the seal insert 10 of the outer punch 17, and enabling two seal punches to move forwards under the pushing action of oil cylinders (not shown) at two sides respectively to realize the sealing of the end part of the tube blank 16;
step three: the control system controls the press and the supercharger to realize the forming process;
step four: and (3) pressure relief is carried out, the driving oil cylinder 15 drives the restraint ring 8 to move to the tail end of the outer punch 17, the restraint of the sealing insert 10 of the outer punch 17 disappears, the left and right sealing punches are withdrawn, the upper die is reset, and the required workpiece is obtained.
In this embodiment:
in the first step, the sealing installation of pipes with different diameters and different wall thicknesses can be realized by adjusting the number of the sealing insert blocks 10 and the conical surface clearance between the inner punch 1 and the outer punch 17; in the plurality of seal inserts 10 on the outer punch seal head 13, the inner diameter of one seal insert 10 at the head end is larger than the outer diameter of the tube blank 16, the head end gap width of the conical surface gap between the outer punch 17 and the inner punch 1 is larger than the wall thickness of the tube blank 16, and the tail end gap width is smaller than the wall thickness of the tube blank 16, so that the tube blank 16 can smoothly enter the conical surface gap between the inner punch 1 and the outer punch 17, and along with the increase of the insertion depth, the gap is gradually reduced, the tube blank 16 is compressed, and the sealing effect is achieved.
In the third step, when the pipe is formed at internal high pressure, the forming process is as follows: the driving device pushes the upper die to move downwards to be matched with the die, and the supercharger flushes a high-pressure liquid medium into the tube blank 16 from the liquid filling channel 2 of the sealing punch at one end; when the pipe is formed by liquid filling and pressing, the forming process is as follows: the booster flushes high-pressure liquid medium into the tube blank 16 from the liquid filling channel 2 of the sealing punch at one end, the driving device pushes the upper die to move downwards to be matched, and the sealing punch moves downwards along with the tube blank 16.
In the second step, the restraint ring 8 is pushed by the driving oil cylinder 15 to move forward to the position of the sealing insert 10 of the outer punch 17, so that the sealing insert 10 is prevented from opening left and right; in the fourth step, the restraint ring 8 is moved to the position of the outer punch seat 7, so that the seal insert 10 can be opened left and right, and the pipe can be conveniently separated from the seal punch.
In the flanging type pipe hydro-forming sealing device and method in the embodiment, the inner side and the outer side of the pipe end are restrained in a combined mode of the inner punch 1 and the outer punch 17, effective sealing can be achieved in inner high-pressure forming and pipe hydro-forming pressing, and self-sealing of pipes with different diameters and different wall thicknesses can be achieved by adjusting the number of sealing inserts of the outer punch 17 and the gap between the outer punch 17 and the inner punch 1.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (10)
1. The utility model provides a turn-ups formula tubular product liquid filling shaping sealing device which characterized in that: the device comprises two sealing punches which are respectively used for sealing two ends of a tube blank, wherein each sealing punch comprises an inner punch, an outer punch and a restraint ring;
the inner punch comprises a connecting section and a sealing section, the head end face of the sealing section is a conical surface, the connecting section of the inner punch is connected with the outer punch, and a liquid filling channel is arranged in the inner punch and is used for filling high-pressure liquid into the tube blank;
the outer punch comprises an outer punch seat, an outer punch sealing head and a sealing insert, and the outer punch seat is sleeved outside the inner punch and connected with the inner punch; the outer punch sealing head is arranged at the head end of the outer punch seat and comprises two semi-cylinders which are oppositely arranged, and the two semi-cylinders are hinged with the outer punch seat and can be opened or spliced in a rotating mode; the sealing insert is a plurality of semi-circular sheets which are sequentially overlapped and are respectively arranged at the head end of the semi-cylinder; the tail ends of the inner cavities of the outer punch sealing head and the sealing insert in a splicing state are cylindrical cavities with fixed diameters, the head ends of the outer punch sealing head and the sealing insert are conical cavities with gradually reduced diameters, and the included angle between the conical surface of each conical cavity and the horizontal direction is smaller than the included angle between the conical surface of the head end of the inner punch and the horizontal direction;
the constraint ring is sleeved outside the outer punch and is in sliding connection with the outer punch, and the constraint ring is used for constraining the outer punch sealing head and the sealing insert in a splicing state.
2. The flanging-type pipe hydro-forming sealing device according to claim 1, wherein: the outer punch seat is connected with the inner punch through an adjusting bolt; the top and the bottom of the outer punch seat are respectively provided with a rectangular step groove, the top and the bottom of the connecting section of the inner punch are opposite to each other and are respectively provided with two first threaded holes, the top of the adjusting bolt is clamped at the step of the rectangular step groove, and the bottom of the adjusting bolt is connected in the first threaded holes.
3. The flanging-type pipe hydro-forming sealing device according to claim 1, wherein: and the two semi-cylinders are hinged through a rotating shaft.
4. The flanging-type pipe hydro-forming sealing device according to claim 3, wherein: the outer punch seat is further provided with a driving oil cylinder, a telescopic rod of the driving oil cylinder is connected with the restraint ring, two grooves are further formed in the inner side of the restraint ring, and the two grooves are opposite to the two rotating shafts respectively.
5. The flanging-type pipe hydro-forming sealing device according to claim 1, wherein: the sealing insert and the outer punch sealing head are fixed through bolts.
6. The flanging-type pipe hydro-forming sealing device according to claim 1, wherein: the included angle between the conical surface of the head end of the inner punch and the horizontal direction is 30-60 degrees.
7. The flanging-type pipe hydro-forming sealing device according to claim 1, wherein: the included angle between the conical surface of the conical cavity and the horizontal direction is 30-60 degrees.
8. A flanging type pipe hydro-forming sealing method based on the flanging type pipe hydro-forming sealing device of any one of claims 1-7 is characterized by comprising the following steps:
the method comprises the following steps: installing a sealing insert on the outer punch sealing head according to the diameter of the tube blank, adjusting the conical surface gap between the conical surface in the cavity at the head end of the outer punch and the conical surface at the head end of the inner punch according to the thickness of the tube blank tube wall, and respectively installing the two sealing punches on punch slide rails at the two ends of the tube blank;
step two: placing the tube blank at a set position, driving a restraint ring to move to the head end of an outer punch by a driving oil cylinder, restraining a sealing insert, and enabling two sealing punches to move forwards under the pushing action of oil cylinders at two sides respectively to realize sealing of the end part of the tube blank;
step three: the control system controls the press and the supercharger to realize the forming process;
step four: and (4) releasing pressure, driving the oil cylinder to drive the restraint ring to move to the tail end of the outer punch, enabling the seal insert to be restrained and disappear, withdrawing the two seal punches, and resetting the upper die to obtain the required workpiece.
9. The flanging-type pipe hydro-forming sealing method according to claim 8, characterized in that: in the first step, one of the sealing inserts arranged on the outer punch sealing head has an inner diameter larger than the outer diameter of the tube blank, the gap width of the front end of the conical surface gap between the outer punch and the inner punch is larger than the wall thickness of the tube blank, and the gap width of the rear end of the conical surface gap between the outer punch and the inner punch is smaller than the wall thickness of the tube blank.
10. The flanging-type pipe hydro-forming sealing method according to claim 8, characterized in that: in the third step, when the pipe is formed at internal high pressure, the forming process is as follows: the driving device pushes the upper die to move downwards to be matched with the die, and then the supercharger flushes a high-pressure liquid medium into the tube blank from a liquid filling channel of the sealing punch at one end; when the pipe is formed by liquid filling and pressing, the forming process is as follows: the booster flushes high-pressure liquid medium into the pipe blank from a liquid filling channel of the sealing punch at one end, then the driving device pushes the upper die to move downwards to be matched, and the sealing punch moves downwards along with the pipe blank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911366061.9A CN111014417B (en) | 2019-12-26 | 2019-12-26 | Flanging type pipe liquid filling forming sealing device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911366061.9A CN111014417B (en) | 2019-12-26 | 2019-12-26 | Flanging type pipe liquid filling forming sealing device and method |
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| CN111014417B true CN111014417B (en) | 2021-05-28 |
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| 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 |
| CN111774468B (en) * | 2020-07-27 | 2024-05-10 | 佛山市永恒液压机械有限公司 | Be used for Shan Kaka press pipe fashioned mould |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4696334B2 (en) * | 2000-05-18 | 2011-06-08 | 住友金属工業株式会社 | Hydroform method |
| WO2005070582A1 (en) * | 2004-01-21 | 2005-08-04 | Sumitomo Metal Industries, Ltd. | Mother pipe for hydraulic bulging, hydraulic bulging device using the same, hydraulic bulging method, and hydraulically bulged product |
| US7685856B1 (en) * | 2008-11-11 | 2010-03-30 | Gm Global Technology Operations, Inc. | Two mode hydroform seal apparatus and method |
| CN105179691B (en) * | 2015-09-24 | 2017-03-29 | 哈尔滨工业大学 | A kind of pipe end grip seal fixture |
| CN106853473B (en) * | 2016-12-06 | 2019-02-22 | 柳州科瑞科技有限公司 | A kind of zigzag push top for forming high pressure in pipe |
| CN208793844U (en) * | 2018-09-20 | 2019-04-26 | 佛山市顺德区美的饮水机制造有限公司 | Piping connection seal assembly |
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