CN104646998A - Self-suction bulging device, and rolling press device of pipe interior automatic forming and self-positioning - Google Patents
Self-suction bulging device, and rolling press device of pipe interior automatic forming and self-positioning Download PDFInfo
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- CN104646998A CN104646998A CN201410852547.4A CN201410852547A CN104646998A CN 104646998 A CN104646998 A CN 104646998A CN 201410852547 A CN201410852547 A CN 201410852547A CN 104646998 A CN104646998 A CN 104646998A
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- mandrel
- self
- retainer
- automatic forming
- fixture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/022—Extracting or inserting relatively long parts
Abstract
The invention provides a self-suction bulging device, and a rolling press device of pipe interior automatic forming and self-positioning. The self-suction bulging device comprises a retainer (1), a mandrel (7) and a plurality of pin rollers (2), wherein one end of the mandrel (7) is provided with a conic section (71), the plurality of pin rollers (2) are evenly distributed between the retainer (1) and a conic section (71) of the mandrel (7), when the conic section (71) of the mandrel (7) extrudes the pin rollers (2), and the axial component force of the friction generated from the pin rollers (2) to the mandrel (7) is greater than the axial component force of the extrusion force generated from the pin rollers (2) to the mandrel (7). The self-suction bulging device has the advantages that the stress state of the mandrel is improved, and the service life of the bulging device is prolonged; the rolling press device of pipe interior automatic forming and self-positioning has the advantages that the axial automatic positioning function of the bulging device and a work fixture can be achieved, the positioning accuracy requirements of the work fixture are lowered, the processing difficulty of the work fixture is reduced, so that the processing cost is reduced, meanwhile, the forming precision of a connecting piece is ensured.
Description
Technical field
The present invention relates to tubing interconnection technique field, particularly a kind of self-priming bulging device connected without the roll extrusion of enlarging internal diameter for titanium alloy conduit, also the inner automatic forming of a kind of tubing containing this self-priming bulging device and self-align rolling device.
Background technology
Titanium alloy conduit is mainly used in the hydraulic plumbing system of aircraft engine without enlarging internal diameter roll extrusion interconnection technique, bears higher pressure and complex vibration environment.Compared with conventional coupling arrangement, have: high leakproofness, self-locking vibration resistance, lightweight, applicable thin-wall high intensity and titanium alloy pipe, life-span high.This technology is very ripe at national developments such as America and Europes, and special equipment realizes computer automation, in aerospace field extensive use.Russia also develops comparatively fast, and Multiple Type is applied.
Domesticly to start late, originally mainly introduce and digest and assimilate external technique, in recent years, along with improving constantly of aircraft engine hydraulic plumbing system performance, higher requirement is proposed to pipeline interconnection technique, traditional enlarging connection is connected with extrusion pressing type non-enlarging and does not meet the demands, type aircraft clearly proposes adopt titanium alloy conduit without enlarging internal diameter roll extrusion connector, engine also there is tight demand, each main engine plants and research institute further investigate without enlarging internal diameter roll extrusion interconnection technique titanium alloy conduit, obtain very fast progress.
Existing titanium alloy conduit is without enlarging internal diameter roll extrusion interconnection technique, and as shown in Figure 1, bulging device is the fixture for forming that the roll extrusion of titanium alloy catheter diameter connects, and critical piece comprises mandrel 7, roller 2 and retainer 1.During shaping, the mandrel 7 of bulging device drives at motor and rotates limit axial advance below, and roller 2 rotation under frictional force effect is also revolved round the sun with mandrel 7, simultaneously radial feed, extruded conduit 22 material embeds the groove of pipe box 21, thus makes conduit 22 together with pipe box 21 compact siro spinning technology.
But along with tube material intensity, hardness improve constantly, there are problems in use procedure in bulging device.As in forming process, mandrel by motor driving shaft to propelling, mandrel by radial compression power and and roller between slip and the effect of rolling mixed film friction power, along with the raising of tubing intensity, hardness, mandrel is stressed increasing, there is the phenomenons such as frequent fracture and top layer decortication, have a strong impact on and connect effect and technology stability.
Summary of the invention
In order to solve short problem in existing mandrel service life.The invention provides a kind of self-priming bulging device, the inner automatic forming of tubing and self-align rolling device, self-priming bulging device, by optimizing bulging device structure, improves mandrel force-bearing situation, improves bulging device service life, save manufacturing cost, be conducive to technology stability; The inner automatic forming of tubing and self-align rolling device achieve bulging device and the axial automatic positioning function of frock clamp, reduce the positioning accuracy request of frock clamp own, reduce frock clamp difficulty of processing, thus cut down finished cost, ensure connector forming accuracy simultaneously.
The present invention is the technical scheme solving the employing of its technical problem: a kind of self-priming bulging device, comprise retainer, mandrel and multiple roller, one end of mandrel is provided with conical section, retainer is sheathed on outside mandrel, along the circumference of mandrel, multiple roller is evenly distributed between retainer and the conical section of mandrel, and when the conical section extruding roller of mandrel, the axial thrust load of roller to the frictional force of mandrel is greater than the axial thrust load of roller to the extruding force of mandrel.
Namely the angle between the axis of roller 2 and the axis of mandrel 7 is α, and the half of the coning angle of conical section 71 is β, and the frictional force of roller 2 pairs of mandrels 7 is F, and the extruding force of roller 2 pairs of mandrels 7 is N, F × sin α > N × sin β.
The inner automatic forming of tubing and a self-align rolling device, containing above-mentioned self-priming bulging device, retainer extenal fixation has the pedestal of tubular, and when mandrel rotates, pedestal keeps inactive state, and retainer together rotates with mandrel.
Retainer fixed sleeves is provided with retainer holder, is provided with thrust ball bearing between retainer holder and pedestal, and this thrust ball bearing is set in outside retainer.
Retainer and this thrust ball bearing matched in clearance, retainer and retainer holder matched in clearance, this thrust ball bearing and pedestal matched in clearance, retainer holder and pedestal matched in clearance.
Retainer contains the large footpath section and path section that connect successively, and path section is sheathed on outside the conical section of mandrel, and this thrust ball bearing and retainer fixed seating are located at outside the section of large footpath.
The inner automatic forming of this tubing and self-align rolling device are also containing the driving mechanism for driving mandrel to rotate.
The left side of pedestal is provided with for gripping fixture in pipe box, and interior fixture peripheral hardware has the outer fixture for gripping interior fixture.
Interior fixture is annular, and the outer wall of interior fixture is provided with peripheral flange, and the inwall of interior fixture is provided with the multiple draw-in grooves for stoping pipe box and conduit to move axially.
Interior fixture is arranged on the right side of outer fixture, and interior fixture and outer fixture matched in clearance on the axis direction of mandrel, interior fixture abuts with pedestal.
Interior fixture is monolithic construction, and outer fixture divides half formula structure.
The invention has the beneficial effects as follows:
1, the present invention is by improving bulging device structure, optimizes roll extrusion Joining Technology process, improves production efficiency;
2, this self-priming bulging device auto-feed, stress is improved, and mandrel wear is little, and the life-span improves; Require to reduce to equipment crystallized ability;
3, the inner automatic forming of this tubing and self-align rolling device can realize axially self-align, automatic centering, improve connector forming accuracy, also reduce the processing cost of frock clamp simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the inner automatic forming of self-priming bulging device of the present invention and tubing and self-align rolling device are described in further detail.
Fig. 1 is the structural representation of existing bulging device.
Fig. 2 is the structural representation of the inner automatic forming of tubing and self-align rolling device.
Fig. 3 is the schematic diagram of the roller groove in retainer.
Fig. 4 is the schematic diagram of extruding force suffered by mandrel.
Fig. 5 is the schematic diagram of mandrel friction.
Fig. 6 is structure and the force analysis schematic diagram of interior fixture and outer fixture.
Fig. 7 is interior clamp structure schematic diagram.
Wherein
1. retainer, 11. roller grooves, 12. large footpath sections, 13. path section, 2. roller, 3. pedestal, 4. end rings; 5. retainer holder, 6. retainer back-up ring, 7. mandrel, 71. conical section, 8. outer fixture, fixture 9.;
21. pipe boxes, 22. conduits;
91. first draw-in grooves, 92. first draw-in grooves, 93. first draw-in grooves.
Detailed description of the invention
Below in conjunction with accompanying drawing, self-priming bulging device of the present invention is described in further detail.A kind of self-priming bulging device, described self-priming bulging device comprises retainer 1, mandrel 7 and multiple roller 2, one end of mandrel 7 is provided with conical section 71, retainer 1 is sheathed on outside mandrel 7, along the circumference of mandrel 7, multiple roller 2 is evenly distributed between the conical section 71 of retainer 1 and mandrel 7, when the conical section 71 of mandrel 7 extrudes roller 2, the axial thrust load of the frictional force of roller 2 pairs of mandrels 7 is greater than the axial thrust load of the extruding force of roller 2 pairs of mandrels 7, as shown in Figures 2 to 5.
The roller groove 11 for installing fixing roller 2 is provided with, as shown in Figure 3 in retainer 1.In prior art, roller 2 is conical, and the taper seat of roller 2 coordinates with the conical section 71 of mandrel 7, and the axis of roller 2 and the axis of mandrel 7 are positioned at same plane, roller 2 and mandrel 7 linear contact lay.And the present invention is that roller 2 is for conical, the taper seat of roller 2 coordinates with the conical section 71 of mandrel 7, and the axis of roller 2 and the axis of mandrel 7 be not in same plane,, between the axis of roller 2 and the axis of mandrel 7, there is the angle of setting in roller 2 and mandrel 7 point cantact.
Angle between the axis of roller 2 and the axis of mandrel 7 is α, and the angle namely between the center line of roller groove 11 and the center line of retainer 1 is α, and the half of the coning angle of conical section 71 is β, as shown in Figure 4 and Figure 5.In forming process, time initial, the inwall of roller 2, conduit 22 and mandrel 7 produce initial close contact, each inter-module has contact force, now this mandrel 7 rotates, due to the effect of intimate contact force, produce tangential friction force between roller 2 and mandrel 7, this frictional force of roller 2 pairs of mandrels 7 is F, and the extruding force of roller 2 pairs of mandrels 7 is N.N produces a component in the horizontal direction with radial direction, be respectively N1 and N2, and F produces a component in the horizontal direction and tangentially, is respectively F1 and F2, as shown in Figure 4 and Figure 5, wherein:
N1＝Nsinβ；N2＝Ncosβ
F1＝Fsinα；F2＝Fcosα
So mandrel 7 in the horizontal direction (axis of mandrel 7) total stressed be:
F1-N1＝Fsinα-Nsinβ
Select suitable α and β, make F1>N1.Like this, mandrel 7 will (along mandrel 7) axial feed automatically while rotation, and the movement locus of roller 2 on mandrel 7 is spiral line type, is pure rolling friction between the two.Retainer 1 and retainer holder 5 are for being threaded.In prior art, mandrel 7 must could feeding under motor thrust, except rolling friction, sliding friction is also had between mandrel 7 and roller 2, compared with the present invention, mandrel 7 stress is more severe, the phenomenons such as easy appearance surface decortication and fracture, easily lost efficacy, required also very high to equipment crystallized ability.And self-priming bulging device of the present invention auto-feed, stress is improved, and mandrel wear is little, and the life-span improves; Require to reduce to equipment crystallized ability.
The inner automatic forming of tubing and a self-align rolling device, containing above-mentioned self-priming bulging device, be provided with the pedestal 3 of tubular outside the retainer 1 of this self-priming bulging device, when mandrel 7 rotates, pedestal 3 keeps inactive state, and retainer 1 together rotates with mandrel 7, as shown in Figure 2.
Retainer 1 fixed sleeves is provided with retainer holder 5 and thrust ball bearing, retainer holder 5 and thrust ball bearing are set between retainer 1 and pedestal 3, when mandrel 7 rotates, pedestal 3 keeps inactive state, and retainer 1 and retainer holder 5 together rotate with mandrel 7.Retainer 1 and retainer holder 5 are connected by screw, retainer 1 fixed sleeves is provided with retainer back-up ring 6, pedestal 3 coordinates with equipment, the inner automatic forming of this tubing and self-align rolling device are also containing the driving mechanism for driving mandrel 7 to rotate, and mandrel 7 is connected with the motor shaft of this driving mechanism by spline.
Retainer 1 and this thrust ball bearing matched in clearance, retainer 1 and retainer holder 5 matched in clearance, this thrust ball bearing and pedestal 3 matched in clearance, retainer holder 5 and pedestal 3 matched in clearance.Retainer 1 is containing the large footpath section 12 connected successively from right to left and path section 13, and path section 13 is sheathed on outside the conical section 71 of mandrel 7 left end, and this thrust ball bearing and retainer holder 5 are set in outside large footpath section 12.In addition, conduit 22 in forming process, pipe box 21, roller 2, contact between mandrel 7 and retainer 1 are close contact, ensure that the center line of conduit and mandrel 7 overlaps, thus realize self-centering function, ensure that connector shaft is to the uniformity connected.
As shown in Figure 2, the left side of pedestal 3 is provided with the interior fixture 9 gripping pipe box 21, is provided with the outer fixture 8 gripping interior fixture 9 outside interior fixture 9.
As shown in Figures 5 to 7, interior fixture 9 is annular, the outer wall of interior fixture 9 is provided with peripheral flange 91, is provided with the annular groove matched with peripheral flange 91 in outer fixture 8, and the inwall of interior fixture 9 is provided with three draw-in grooves for stoping pipe box 21 and conduit 22 to move axially.Three draw-in grooves have different positioning function, first draw-in groove 91 and the second draw-in groove 92 coordinate with the relevant position of pipe box 21 respectively, prevent pipe box 21 from moving axially, and the interior profile of interior fixture 9 coordinates with pipe box 21 relevant position outer mold surface, when preventing from being shaped, pipe box 21 radial deformation is excessive; 3rd draw-in groove 93 withstands the termination of conduit 22, ensures connector end overhang.
Interior fixture 9 is arranged on the right side of outer fixture 8, and interior fixture 9 and outer fixture 8 matched in clearance on the axis direction of mandrel 7, interior fixture 9 abuts with pedestal 3.During shaping, the axial force suffered by mandrel 7 is F1-N1, utilizes the principle of active force and reaction force, and therefore conduit 22 by the power G contrary with mandrel 7, and can produce the effect moved axially.Conduit 22 axial displacement is limited by interior fixture 9, so power G part is delivered to interior fixture 9 by conduit 22, make interior fixture 9 by axial force P, interior fixture 9 pedestal 3 that is automatic and bulging device under power P effect fits tightly, therefore, when designing inside and outside fixture assembly relation, being axially matched in clearance, conduit 22 and the axial rigging position of pipe box 21 can be ensured like this, realize axially self-align, again can easy disassembly, reduce the machining accuracy of inside and outside fixture simultaneously, save processing cost.
In addition, interior fixture 9 is monolithic construction, outer fixture 8 point of half formula structure.Namely outer fixture 8 comprises two parts of the plane mirror image each other relative to mandrel 7 axis place.
The above, be only specific embodiments of the invention, can not limit the scope that invention implements with it, so the displacement of its equivalent assemblies, or the equivalent variations done according to scope of patent protection of the present invention and modification, all still should belong to the category that this patent is contained.In addition, the technical characteristic in the present invention and all can using by independent assortment between technical characteristic, between technical characteristic and technical scheme, between technical scheme and technical scheme.
Claims (10)
1. a self-priming bulging device, it is characterized in that, described self-priming bulging device comprises retainer (1), mandrel (7) and multiple roller (2), one end of mandrel (7) is provided with conical section (71), retainer (1) is sheathed on mandrel (7) outward, along the circumference of mandrel (7), multiple roller (2) is evenly distributed between the conical section (71) of retainer (1) and mandrel (7), when the conical section (71) extruding roller (2) of mandrel (7), the axial thrust load of roller (2) to the frictional force of mandrel (7) is greater than the axial thrust load of roller (2) to the extruding force of mandrel (7).
2. the inner automatic forming of tubing and self-align rolling device, it is characterized in that: the inner automatic forming of this tubing and self-align rolling device contain self-priming bulging device according to claim 1, retainer (1) extenal fixation has the pedestal (3) of tubular, when mandrel (7) rotates, pedestal (3) keeps inactive state, and retainer (1) together rotates with mandrel (7).
3. the inner automatic forming of tubing according to claim 3 and self-align rolling device, it is characterized in that: retainer (1) fixed sleeves is provided with retainer holder (5), be provided with thrust ball bearing between retainer holder (5) and pedestal (3), this thrust ball bearing is set in retainer (1) outward.
4. the inner automatic forming of tubing according to claim 3 and self-align rolling device, it is characterized in that: retainer (1) and this thrust ball bearing matched in clearance, retainer (1) and retainer holder (5) matched in clearance, this thrust ball bearing and pedestal (3) matched in clearance, retainer holder (5) and pedestal (3) matched in clearance.
5. the inner automatic forming of tubing according to claim 4 and self-align rolling device, it is characterized in that: retainer (1) is containing large footpath section (12) connected successively and path section (13), path section (13) is sheathed on the conical section (71) of mandrel (7) outward, and this thrust ball bearing and retainer holder (5) are set in large footpath section (12) outward.
6. the inner automatic forming of tubing according to claim 3 and self-align rolling device, is characterized in that: the inner automatic forming of this tubing and self-align rolling device are also containing the driving mechanism for driving mandrel (7) to rotate.
7. the inner automatic forming of tubing according to claim 3 and self-align rolling device, it is characterized in that: the left side of pedestal (3) is provided with the interior fixture (9) for gripping pipe box (21), and interior fixture (9) peripheral hardware has the outer fixture (8) for gripping interior fixture (9).
8. the inner automatic forming of tubing according to claim 7 and self-align rolling device, it is characterized in that: interior fixture (9) is annular, the outer wall of interior fixture (9) is provided with peripheral flange (91), and the inwall of interior fixture (9) is provided with the multiple draw-in grooves for stoping pipe box (21) and conduit (22) to move axially.
9. the inner automatic forming of tubing according to claim 8 and self-align rolling device, it is characterized in that: interior fixture (9) is arranged on the right side of outer fixture (8), interior fixture (9) and outer fixture (8) matched in clearance on the axis direction of mandrel (7), interior fixture (9) abuts with pedestal (3).
10. the inner automatic forming of tubing according to claim 7 and self-align rolling device, is characterized in that: interior fixture (9) is monolithic construction, outer fixture (8) point half formula structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410852547.4A CN104646998B (en) | 2014-12-31 | 2014-12-31 | The internal automatic forming of self-priming bulging device, tubing and self-align rolling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410852547.4A CN104646998B (en) | 2014-12-31 | 2014-12-31 | The internal automatic forming of self-priming bulging device, tubing and self-align rolling device |
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| CN104646998A true CN104646998A (en) | 2015-05-27 |
| CN104646998B CN104646998B (en) | 2016-11-30 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106239032A (en) * | 2016-08-25 | 2016-12-21 | 广州本图机械有限公司 | A kind of centerless external cylindrical rolling mechanism |
| CN108145024A (en) * | 2017-12-29 | 2018-06-12 | 宁波市精恒凯翔机械有限公司 | One kind can position inner intumescence type rolling tools |
| CN108941342A (en) * | 2018-08-28 | 2018-12-07 | 航珍航空技术（上海）有限公司 | A kind of inward turning single lead screw ex truding briquetting machine |
| CN108941341A (en) * | 2018-08-28 | 2018-12-07 | 航珍航空技术（上海）有限公司 | A kind of flareless conduit inward turning single lead screw ex truding briquetting machine |
| CN108971364A (en) * | 2018-08-28 | 2018-12-11 | 航珍航空技术（上海）有限公司 | Flareless inward turning single lead screw ex truding briquetting machine and its expander |
| CN108971363A (en) * | 2018-08-28 | 2018-12-11 | 航珍航空技术（上海）有限公司 | Expander and inward turning single lead screw ex truding briquetting machine |
| CN111346979A (en) * | 2018-12-21 | 2020-06-30 | 宜宾三江机械有限责任公司 | Flaring-free guide pipe rolling connection device and method |
| CN113857324A (en) * | 2021-11-01 | 2021-12-31 | 河北科技大学 | Conduit joint spinning connecting device |
| CN114274080A (en) * | 2022-01-05 | 2022-04-05 | 中国航空制造技术研究院 | Bulging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106239032A (en) * | 2016-08-25 | 2016-12-21 | 广州本图机械有限公司 | A kind of centerless external cylindrical rolling mechanism |
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| CN108941341B (en) * | 2018-08-28 | 2024-01-16 | 航珍航空技术（上海）有限公司 | Non-flaring catheter internal rotation extrusion molding machine |
| CN111346979A (en) * | 2018-12-21 | 2020-06-30 | 宜宾三江机械有限责任公司 | Flaring-free guide pipe rolling connection device and method |
| CN113857324A (en) * | 2021-11-01 | 2021-12-31 | 河北科技大学 | Conduit joint spinning connecting device |
| CN113857324B (en) * | 2021-11-01 | 2024-01-12 | 河北科技大学 | Conduit joint spinning connecting device |
| CN114274080A (en) * | 2022-01-05 | 2022-04-05 | 中国航空制造技术研究院 | Bulging device |
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Address after: 100024 North East military villa, eight Li bridge, Chaoyang District, Beijing Patentee after: China Institute of Aeronautical Manufacturing Technology Address before: 100024 North East military villa, eight Li bridge, Chaoyang District, Beijing Patentee before: Beijing Aviation Manufacturing Engineering Institute of China Aviation Industry Group Company |