CN101745587B - Push-pull type dual-expanding-head of expanding machine - Google Patents
Push-pull type dual-expanding-head of expanding machine Download PDFInfo
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- CN101745587B CN101745587B CN 201010101727 CN201010101727A CN101745587B CN 101745587 B CN101745587 B CN 101745587B CN 201010101727 CN201010101727 CN 201010101727 CN 201010101727 A CN201010101727 A CN 201010101727A CN 101745587 B CN101745587 B CN 101745587B
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Abstract
The invention discloses a push-pull type dual-expanding-head of an expanding machine, which belongs to field of pipeline manufacturing and processing technology, and the dual-expanding-head comprises: an oil cylinder, a left piston, a right piston, an outer sleeve, a push rod, a pull rod, a sealing frame, a radial plunger, a cover plate, a right expanding head, a left expanding head, and a locking nut, wherein, one end of the pull rod is connected with the right expanding head through the locking nut, the other end of the pull rod is connected with the left piston through the locking nut. One end of the push rod is connected with the left expanding head, and the other end of the push rod is connected with the right piston, and the pull rod is sleeved in the push rod. The sealing frame is fixedly connected with the outer sleeve, and the outer sleeve is connected with the oil cylinder, meanwhile, the radial plunger is installed in a plunger hole arranged on the sealing frame. The cover plate is fixed at the radial plunger. The invention has reasonable design, good effect, and decreases driving force of the expanding head, and improves the lubricating condition between a bulging block and the expanding head, and greatly increases the reliability of the device; the efficiency of energy utilization is greatly increased.
Description
Technical field
Plug-type two heads that expand of expanding machine of the present invention belong to pipeline manufacturing and processing technique field, are mainly used in the hole enlargement production of high material, heavy wall straight-line joint submerged arc welding tube.
Background technology
Hole enlargement is one of most important process procedure during straight-line joint submerged arc welding tube is made, and it is that a kind of hydraulic coupling or mechanical pressure utilized makes steel pipe produce a kind of cold-formed technology that radially dilates from inwall.The critical process that guarantees the straight-line joint submerged arc welding tube geometric accuracy is not only in hole enlargement, also is to eliminate the moulding of steel pipe and the critical process of welding residual stress, and still be, strict and the most effective quality inspection means uniqueness simultaneously to the welded tube weld seam.Present straight-line joint submerged arc welding tube hole enlargement is both at home and abroad produced used machinery expanding machine and is all adopted the taper of rod-pulling type list to expand the design of head, the bloated piece of many lobes.This expanding machine is in loading the hole enlargement process, can only be provided by a mobile acting of expanding head by hole enlargement steel tube place energy requirement, the main feature of its structural design is: pull bar one end expands head with taper and is connected, the pull bar other end is connected with the hole enlargement oil cylinder piston, many lobes mould sagittal plane is close to and expands the nose cone face, can obtain the driving force from oil cylinder, the axial vane surface of many lobes mould does not move axially under the thrust function of positioning disk.During hole enlargement, oil cylinder piston expands head by pull bar to taper and loads, and forces conehead to move and many lobes piece that expands is produced thrust, and under the acting in conjunction of expanding head and positioning disk, many lobes expand that piece radially opens gradually and to steel pipe enforcement carrying out hole enlargement.Production practices show, be based upon the expanding machine on this design concept, the main three aspect shortcomings that exist: one, for satisfying single energy requirement that expands a hole enlargement, oil cylinder is required to be the expansion head very big driving force is provided, under its size design space condition of limited, with bearing very big tension and compression pulsating stress, very easily in its threaded connection place fatigue fracture takes place easily as the pull bar of driving force member; Its two, the hole enlargement work system is difficult to realize that sealing is lubricated, the wearing and tearing that bad lubricating conditions can each member of acceleration equipment; Its three because it is lubricated to form sealing, lubricating oil is difficult to recycle, and has strengthened production cost, and operating environment is caused severe contamination.Because the restriction of above-mentioned unfavorable conditions, this traditional machinery expanding machine will face serious challenge aspect the device security reliability, be difficult to adapt to the trend that the high materialization of welded tube new product, big wall thickening direction develop.
Summary of the invention
The object of the present invention is to provide a kind of driving force that can reduce to expand, piece and expand coefficient of friction between the head, improve plug-type two head design methods that expand of the relevant expanding machine of the heat radiation between the friction pair reduces to expand.
The objective of the invention is to reach by following measure, the present invention is by oil cylinder, left piston, right piston, outer sleeve, push rod, pull bar, sealing frame, radial plunger, cover plate, the right head that expands, head is expanded on a left side, locking nut is formed, one end of pull bar is connected with the right head that expands by locking nut, the other end of pull bar is connected by locking nut with left piston, one end of push rod expands head with a left side and is connected, the other end of push rod is connected with right piston, drag link sleeve is in push rod, the outer sleeve that sealing frame is fixedly connected, outer sleeve connects oil cylinder, radial plunger is installed in the bar hole that is provided with on the sealing frame, and cover plate is fixed on the radial plunger.
Expanding on the head on a left side has the inclined-plane, and expanding on the head on the right side has the inclined-plane, and the end of radial plunger is the conical surface, and the inclined-plane that the conical surface of radial plunger end and a left side are expanded on a head and right expand cooperates.
On the sealing frame hoop, offer bar hole, install in each bar hole and hold a plunger, on bar hole, establish seal groove, sealing ring is installed in seal groove.
Sealing frame is enclosed within a left side and expands head and right the expansion on the head, and head is expanded on a left side and the right head that expands can move axially in sealing frame.
Radial plunger and cover plate are formed the piece that expands, radial plunger with expand the nose cone face and be close to, radial plunger radially for bar shaped, it circumferentially is subtriangular, cover plate contacts with the steel pipe inwall.
Oil cylinder adopts double-piston to serve oil cylinder, the left piston cylinder lever connecting rod of oil cylinder, pull bar connects the right head that expands, the right piston of oil cylinder connects push rod, push rod connects a left side and expands head, can be respectively by correspondence push rod and pull bar simultaneously to a left side that is connected with bar expand head, right expand that head implements identical amount of movement push away, draw loading, and then drive many lobes piece that expands simultaneously and be close to two and expand the nose cone faces and realize the expand tube hole enlargement.
Start oil cylinder, the beginning of left and right expansion head is close mutually, begin outwards to do radial motion with the contacted radial plunger in a left and right expansion inclined-plane, cover plate contacts with the inwall of welded tube, when radial plunger and cover plate outwards bulge, the stressed generation plastic expansion distortion of welded tube keeps certain hour, thereby finishes the hole enlargement of one section welded tube.Under the condition that single hole enlargement active length remains unchanged, adopt plug-type two expansion head that steel pipe is carried out hole enlargement and compare with adopting single taper expansion head, the expansion head can reduce half in the needed driving force of hole enlargement process.In addition, owing to have the Seal Design space between plunger and the bar hole, on bar hole, offer seal groove, can reach the Seal Design requirement after installing sealing ring additional, make expansion head and bloated piece contact portion be in the full oil lubrication state of sealing in the overall process of hole enlargement, lubricating condition will be greatly improved.
The present invention is reasonable in design, and is respond well, reduced to expand a driving force, improved bloated piece and expanded lubricating condition between the head, strengthened the reliability of equipment greatly, and efficiency of energy utilization has significantly raising.
Description of drawings
Accompanying drawing 1 is plug-type two header structure schematic diagrames that expand of expanding machine of the present invention.
Accompanying drawing 2 is radial plunger structural representations of the present invention.
Accompanying drawing 3 is vertical views of accompanying drawing 2.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
Among the figure: oil cylinder 1, left piston 2, right piston 3, outer sleeve 4, push rod 5, pull bar 6, sealing frame 7, radial plunger 8, cover plate 9 right expands 10, welded tube 11, locking nut 12, a left side expands 13, locking nut 14, oil-in 15, oil-in 16, dust ring 17, combined seal ring 18, guidance tape 19.
As shown in Figure 1, the present invention is by oil cylinder 1, left piston 2, right piston 3, outer sleeve 4, push rod 5, pull bar 6, sealing frame 7, radial plunger 8, cover plate 9, right expand 10, a left side expands 13, locking nut 12, locking nut 14 compositions such as grade, one end of pull bar is by locking nut 12 and right expand 10 and be connected, the other end is connected by locking nut 14 with left piston 2, one end of push rod 5 and a left side are expanded 13 and are connected, the other end is connected with right piston 3, pull bar 6 is enclosed within the push rod 5, sealing frame 7 is connected and fixed by the outer sleeve 4 that is connected with oil cylinder 1, be provided with plunger hole on the sealing frame 7 with radial plunger 8 quantity unanimities, three grooves have all been opened on each plunger hole, load onto dust ring 17 respectively, combined seal ring 18, guidance tape 19, oil inside when guaranteeing to do radial motion in the plunger hole that radial plunger 8 is provided with on sealing frame 7 does not leak outside, reach the effect of sealing, cover plate 9 is fixed on the radial plunger 8, start oil cylinder 1, oil-in 15 beginning oil-feed pressurisings, left piston 2 is moved to the left under pressure, the pull bar that is connected with left piston 2 begins axially to left movement, simultaneously, right piston 3 moves right, the push rod 5 that promotion is attached thereto, the left side that is connected with push rod 5 is expanded 13 and is begun to move right, right expand 10 under the effect of pull bar 6 to left movement, about to expand the head beginning close mutually, with about expand contacted radial plunger 8 beginnings in an inclined-plane and outwards do radial motion, cover plate 9 is fixed on the radial plunger 8 and with the inwall of welded tube 11 and contacts, when radial plunger 8 and cover plate 9 outwards bulge, welded tube 11 stressed generation plastic expansion distortion, keep certain hour, thereby finish the hole enlargement of one section welded tube, shed pressure then, oil-in 16 beginning oil-feed pressurisings, beginning is exerted pressure in an other side of two-piston, pull bar 6 pushes back under the effect of left piston 2 and right expands 10, simultaneously, push rod 5 retracts a left side and expands 13 under the effect of right piston 3, draw plunger 8 and cover plate 9 in, mobile welded tube 11, making not, wide diameter portion divides the position that arrives cover plate 9, through repeating above-mentioned steps repeatedly, can finish the hole enlargement work of whole welded tube.
Shown in accompanying drawing 2, accompanying drawing 3, the end of radial plunger of the present invention is the conical surface, the conical surface of radial plunger end expands head with a left side and the right inclined-plane that expands on the head cooperates, radial plunger and cover plate are formed the piece that expands, radial plunger with expand the nose cone face and be close to, radial plunger radially for bar shaped, it circumferentially is subtriangular.
The present invention has adopted the dynamical system of a double-piston servo-cylinder as expanding machine, and provide left expansion head, the right working method that expands head and the bloated piece organic assembling of many lobes, the double-piston servo-cylinder can expand head to a left side that is connected with bar by corresponding push rod with pull bar respectively simultaneously, the right head that expands is implemented pushing away of identical amount of movement, draw loading, and then drive many lobes piece that expands simultaneously and be close to two and expand the nose cone faces and realize the expand tube hole enlargement, among the present invention each expands half that head only need provide gross energy, expand under the situation that a displacement remains unchanged and expand a displacement and traditional expanding machine list, expand the mobile required driving force of head and can correspondingly reduce half at each.The present invention adopts sealing frame, and two in sealing frame overcoat expands head, and expanding head can move axially in sealing frame, the bloated piece of every lobe is made up of two parts, be plunger wherein with expanding the part that the nose cone face is close to, its radially for bar shaped, it circumferentially is subtriangular, the part that contacts with the steel pipe inwall is a cover plate.Along the bar hole of offering respective amount on the sealing frame hoop, each bar hole can hold a plunger, when two expansion heads move axially, plunger is under the promotion of two expansion nose cone faces, in bar hole, move radially, and promote whole many lobes piece that expands and move radially, thereby reach the purpose of hole enlargement expand tube, owing to have the Seal Design space between plunger and the bar hole, on bar hole, offer seal groove, can reach the Seal Design requirement after installing sealing ring additional, make and expand head and bloated piece contact portion are in sealing in the overall process of hole enlargement full oil lubrication state, lubricating condition will be greatly improved, in the hole enlargement process, follow the circulation back and forth of expanding head to move, the shared volume size of lubricating oil circulation change in the annular seal space, lubricating oil is in flow regime repeatedly, realizes the refrigerating function to lubricating oil.
Claims (5)
1. plug-type two heads that expand of an expanding machine is characterized in that; Form by oil cylinder, left piston, right piston, outer sleeve, push rod, pull bar, sealing frame, radial plunger, cover plate, right expansion head, left side expansion head, locking nut, one end of pull bar is connected with the right head that expands by locking nut, the other end of pull bar is connected by locking nut with left piston, one end of push rod expands head with a left side and is connected, the other end of push rod is connected with right piston, drag link sleeve is in push rod, the fixedly connected outer sleeve of sealing frame, outer sleeve connects oil cylinder, radial plunger is installed in the plunger hole that is provided with on the sealing frame, and cover plate is fixed on the radial plunger.
2. plug-type two heads that expand of expanding machine according to claim 1 is characterized in that; Expanding on the head on a left side has the inclined-plane, and expanding on the head on the right side has the inclined-plane, and the end of radial plunger is the conical surface, and the inclined-plane that the conical surface of radial plunger end and a left side are expanded on a head and right expand cooperates.
3. plug-type two heads that expand of expanding machine according to claim 1 is characterized in that; On the sealing frame hoop, offer bar hole, install in each bar hole and hold a plunger, on bar hole, establish seal groove, sealing ring is installed in seal groove.
4. plug-type two heads that expand of expanding machine according to claim 1 is characterized in that; Sealing frame is enclosed within a left side and expands head and right the expansion on the head, and head is expanded on a left side and the right head that expands moves axially in sealing frame.
5. plug-type two heads that expand of expanding machine according to claim 1 is characterized in that; Radial plunger and cover plate are formed the piece that expands, radial plunger with expand the nose cone face and be close to, radial plunger radially be bar shaped, radial plunger be subtriangular circumferentially, cover plate contacts with the steel pipe inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010101727 CN101745587B (en) | 2010-01-20 | 2010-01-20 | Push-pull type dual-expanding-head of expanding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010101727 CN101745587B (en) | 2010-01-20 | 2010-01-20 | Push-pull type dual-expanding-head of expanding machine |
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| CN101745587A CN101745587A (en) | 2010-06-23 |
| CN101745587B true CN101745587B (en) | 2011-10-05 |
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| CN 201010101727 Active CN101745587B (en) | 2010-01-20 | 2010-01-20 | Push-pull type dual-expanding-head of expanding machine |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878259A (en) * | 2014-03-17 | 2014-06-25 | 刘战晓 | Novel full-automatic steel tube expanding machine |
| CN106001289A (en) * | 2016-05-27 | 2016-10-12 | 南昌航空大学 | Opposite-extrusion diameter expanding device and method for circular pipe fitting |
| CN107520283B (en) * | 2017-09-18 | 2019-01-11 | 沈阳飞机工业（集团）有限公司 | Interior bulging formula conduit circularity finishing fixture |
| CN107597889A (en) * | 2017-09-25 | 2018-01-19 | 西安长峰机电研究所 | A kind of semi-closed structure thin-wall barrel hot sizing device |
| CN112191752B (en) * | 2020-09-10 | 2022-05-20 | 江门市响珰珰钢业有限公司 | Pre-flaring device for low-wall-thickness steel pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1319966A1 (en) * | 1985-06-05 | 1987-06-30 | Предприятие П/Я Г-4217 | Tube expander |
| CN2122013U (en) * | 1991-07-19 | 1992-11-18 | 四川石油管理局油气田建设工程公司 | Duct expander |
| CN2363809Y (en) * | 1999-03-18 | 2000-02-16 | 武湘川 | Pipe expander |
-
2010
- 2010-01-20 CN CN 201010101727 patent/CN101745587B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1319966A1 (en) * | 1985-06-05 | 1987-06-30 | Предприятие П/Я Г-4217 | Tube expander |
| CN2122013U (en) * | 1991-07-19 | 1992-11-18 | 四川石油管理局油气田建设工程公司 | Duct expander |
| CN2363809Y (en) * | 1999-03-18 | 2000-02-16 | 武湘川 | Pipe expander |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-14011A 2005.01.20 |
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| CN101745587A (en) | 2010-06-23 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20100623 Assignee: Panyu Zhujiang steel pipe (Zhuhai) Co., Ltd. Assignor: Zhujiang Steel Pipe Co., Ltd., Panyu Contract record no.: 2012440000672 Denomination of invention: Push-pull type dual-expanding-head of expanding machine Granted publication date: 20111005 License type: Exclusive License Record date: 20121218 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180529 Address after: 519050 No. 1 south water road, equipment manufacturing area, Gaolan Port Economic Zone, Zhuhai, Guangdong Patentee after: Panyu Zhujiang steel pipe (Zhuhai) Co., Ltd. Address before: 511450 Guangdong Guangzhou Panyu District Shiji Town Qinghe Road Panyu Zhujiang Steel Tube Co., Ltd. Patentee before: Zhujiang Steel Pipe Co., Ltd., Panyu |
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| TR01 | Transfer of patent right |