CN102688927B - Forward spinning mechanism for cylindrical member - Google Patents
Forward spinning mechanism for cylindrical member Download PDFInfo
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- CN102688927B CN102688927B CN201210144751.1A CN201210144751A CN102688927B CN 102688927 B CN102688927 B CN 102688927B CN 201210144751 A CN201210144751 A CN 201210144751A CN 102688927 B CN102688927 B CN 102688927B
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Abstract
The invention discloses a forward spinning mechanism for cylindrical member. A spinning wheel seat of the spinning machine is fitted on the spinning wheel seat fitting section of a spinning wheel spindle; a spinning wheel is mounted on the spinning wheel mounting section of the spinning wheel spindle and fixed on the end face of the positioning boss of the spinning wheel spindle; a fixation clamp plate is fitted on a press ring mounting section via a pair of angular contact bearings and a press ring is fitted on the outer circumference of the fixation clamp plate; a set nut is fitted on a set nut mounting section; and the spinning wheel spindle, the spinning wheel and the press ring have coincident axial lines. According to the forward spinning mechanism provided by the invention, the press ring freely rotates relative to the spinning wheel and the spinning wheel spindle to reduce friction between the blank and the press ring and exert inward radial extruding effects on the blank bulging in front of the spinning wheel during the spinning process so as to limit outward radial flow of material in front of the spinning wheel, promote axial flow of the material during processing, inhibit diameter expansion of the blank in the non-spinning region, make deformation of the cylindrical member smooth during the forming process and finally prevent bell mouth generation at the tail end of the blank at the late stage of spinning.
Description
Technical field
The invention belongs to rotary pressing processing field, specifically a kind of for cylindrical member forward spinning machine.
Background technology
Cylindrical member forward spinning is a kind of successive partial plastic forming method for the high accuracy thin-wall tube-shaped element that is shaped, and has the features such as spinning force is little, production efficiency is high, labour intensity is little.In cylindrical member forward spinning process, tubular blank axis and core dead in line are fixed and are made in tubular blank one end by clamping device and core, and the active rotation by core drives the rotation of synchronizeing of blank and core.Spinning roller axially does straight-line feed to the tubular blank other end along core and moves, and tubular sotck thinkness attenuate length is extended and form thin-walled long tubular workpiece.
But in cylindrical member forward spinning latter stage, because the constraint that blank tail end material is subject to is less, material mobile phase is to freedom, tail end material flows and can produce hole enlargement and form similar bell-mouthed defect spinning process cannot be proceeded.For above-mentioned situation, common processing method is to strengthen the axial allowance of blank, makes spinning roller not be screwed into the tail end of blank, and the method excision of the horn mouth machining after spinning finishes, tail end being produced.This obviously can reduce the utilization rate of material, increases cost.Therefore, take measures to suppress bell-mouthed formation, increase mould pressing segment length, for improving stock utilization, reduce costs, especially, for precious metal, there is very important meaning.
At present, in the prior art, the bell-mouthed processing method producing for cylindrical member forward spinning tail end in latter stage except above-described the reserved certain allowance of blank tail end the method excision that adds with machine after spinning, also have by after completing at spinning, the horn mouth of workpiece tail end is shunk and eliminated to the necking spinning forming operation of additional multi-pass, but this multi-pass reducing operation can extend manufacture cycle greatly, lower operating efficiency, and in the time that workpiece tail end horn mouth is carried out to reducing, very easily there is unstability in tail end material, when serious, can produce wrinkling or break.In sum, in existing technology, not yet proposing can be effectively, suppresses pointedly the bell-mouthed method of cylindrical member forward spinning tail end.
Summary of the invention
In order to prevent that in cylindrical member forward spinning process, tail end produces horn mouth, increase spinning part length, improve stock utilization, reduce costs, the present invention proposes a kind of for cylindrical member forward spinning machine.
The present invention includes spinning roller mandrel, spinning roller, trim ring, fixed cover, sleeve, pair of horns contact bearing and bearing (ball) cover;
Wherein:
Described spinning roller mandrel is Pyatyi multidiameter, has formed respectively rotary wheel base and has coordinated section, positioning boss, spinning roller construction section, trim ring construction section and mark closely nut construction section; Mark closely one end that nut construction section is positioned at spinning roller mandrel, rotary wheel base coordinates section to be positioned at the other end of spinning roller mandrel; Trim ring construction section is positioned at marks closely nut construction section inner side; Spinning roller construction section is between trim ring construction section and the rotary wheel base section of cooperation, and this spinning roller construction section has with the rotary wheel base section of cooperation adjoiner the positioning boss radially protruding;
The rotary wheel base that the rotary wheel base of spinning machine is sleeved on spinning roller mandrel coordinates in section; Spinning roller is arranged on the spinning roller construction section of spinning roller mandrel, and is fixed on the end face of positioning boss of spinning roller mandrel; Fixed cover is sleeved on trim ring construction section by pair of horns contact bearing, and trim ring is sleeved on the excircle of fixed cover; Marking closely nut sleeve loads on nail nut construction section; The dead in line of spinning roller mandrel, spinning roller and trim ring;
Spinning roller is the double tapered roller that power spinning of tube workpiece is used;
The length of trim ring is 10～20 times of blank wall thickness, and the external diameter of trim ring is determined by formula (1):
d
p=d
r-2Δt-(0.2～0.4)t
0（1）
Wherein, d
pfor trim ring external diameter, d
rfor spinning roller diameter, Δ t is passage attenuate amount, t
0for the initial wall thickness of tubular blank.
There is stepped through hole at the end plate center of described fixed cover one end, and the aperture of fixed cover aperture coordinates with the diameter of the spinning roller construction section of spinning roller mandrel, in fixed cover macropore, lays felt collar; The external peripheral surface of the fixed cover other end has the flange radially protruding.
Assembling process of the present invention is as follows:
The first step: spinning roller is enclosed within on the spinning roller construction section of spinning roller mandrel, and makes the positioning boss laminating of its end face being connected with the positioning boss of spinning roller mandrel and spinning roller mandrel, then with bolt, spinning roller is connected with the positioning boss of spinning roller mandrel.
Second step: trim ring is enclosed within on the trim ring construction section of spinning roller mandrel, then by within being embedded in trim ring with the fixed cover of felt collar, on the spinning roller construction section of spinning roller mandrel, and the corresponding end face of trim ring end face with threaded hole and fixed cover is fitted felt sleeve.
The 3rd step a: angular contact bearing is enclosed within on the trim ring construction section of spinning roller mandrel and its inner ring end face and the shaft shoulder that forms of third and fourth grade of axle of spinning roller mandrel are fitted, its cycle surface is fitted with the corresponding end face of fixed cover.And then successively sleeve and another angular contact bearing are enclosed within on the trim ring construction section of spinning roller mandrel sleeve is placed between the inner ring end face of pair of horns contact bearing.
The 4th step: two locknuts are screwed on the screw thread of level V axle of spinning roller mandrel, and make it fasten the inner ring of angular contact bearing.
The 5th step: bearing (ball) cover is installed, is made the cycle surface laminating of its vertical wall section end face and bearing, the end face of flange section and the outer face of fixed cover fit.
The 6th step: by the screwed hole of bearing (ball) cover, fixed cover and trim ring, three is tightened together with hex bolts.
The blank that trim ring in device proposed by the invention can be heaved spinning roller front in spinning process produces inside radial compression effect, thereby the outside Radial Flow of restriction spinning roller front material, promote that in process, material flows vertically, suppress the not hole enlargement of spinning district blank, make in cylindrical member forming process distortion steadily, finally reach at spinning the effect that prevents that blank tail end horn mouth from producing latter stage.Because this trim ring is to be arranged on spinning roller mandrel by bearing, so trim ring can rotate with respect to spinning roller and spinning roller mandrel independence and freedom under the drive of blank, be so just conducive to reduce the friction between blank and trim ring in addition, optimize contact condition.And for different wall thickness reduction amounts, adopt the present invention only need ensure the primary clearance between trim ring and blank outer surface and make primary clearance to be (0.1～0.2) t by the trim ring of changing various outer diameter
0, t
0for the initial wall thickness of tubular blank, this primary clearance can prevent in contact and the friction that produce unnecessary with blank outer surface of spinning starting stage trim ring.Finally find by test, when carry out single pass spinning under certain identical process conditions time, common cylindrical member forward spinning can make the valid shaping segment length of spinning part reach 1.5 times of blank original axial direction length, be 2 times of blank original axial direction length and adopt device proposed by the invention to carry out spinning part valid shaping segment length that cylindrical member forward spinning can reach, prove that thus device proposed by the invention finally can reach inhibition horn mouth and produce, increase the valid shaping section of spinning part, improve the object of stock utilization.
Brief description of the drawings
Fig. 1 is the horn mouth defect schematic diagram of cylindrical member spinning generation in latter stage;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the structural representation of spinning roller mandrel, and wherein, Fig. 3 a is front view, and Fig. 3 b is left view;
Fig. 4 is the structural representation of spinning roller, and wherein, Fig. 4 a is front view, and Fig. 4 b is left view;
Fig. 5 is the structural representation of trim ring, and wherein, Fig. 5 a is front view, and Fig. 5 b is left view;
Fig. 6 is the structural representation of bearing (ball) cover, and wherein, Fig. 6 a is front view, and Fig. 6 b is left view;
Fig. 7 is the structural representation of fixed cover, and wherein, Fig. 7 a is front view, and Fig. 7 b is left view.In figure:
1. bearing (ball) cover 2. locknut 3. hex screw 4. fixed cover 5. trim ring 6. angular contact bearings
7. sleeve 8. spinning roller mandrel 9. spinning roller 10. felt collar 11. rotary wheel bases coordinate section
12. positioning boss 13. spinning roller construction section 14. trim ring construction section 15. locknut construction sections
Detailed description of the invention
The present embodiment is a kind of for cylindrical member forward spinning machine.The blank of this cylindrical member is LF21M aluminium alloy pipe, and its external diameter is 106mm, and internal diameter is 100mm, and tube wall thickness is 3mm, and its axial length is 500mm.In the spinning process of the implementation case, the wall thickness reduction amount of blank is 1.2mm.
The bell-mouthed mechanism of the present embodiment inhibition aluminium alloy used cylindrical member forward spinning tail end comprises spinning roller mandrel 8, spinning roller 9, trim ring 5, fixed cover 4, sleeve 7, pair of horns contact bearing 6 and bearing (ball) cover 1.
Spinning roller mandrel 8 is Pyatyi multidiameter.One end of this spinning roller mandrel 8 is for marking closely nut construction section 15, and this marks closely nut construction section 15 external screw thread.The other end of this spinning roller mandrel 8 is that the rotary wheel base that this spinning roller mandrel 2 is connected with the rotary wheel base of spinning machine coordinates section 11, and this rotary wheel base coordinates the external diameter of section 11 identical with the internal diameter of installing hole on rotary wheel base.Trim ring construction sections 14 marking closely nut construction section 15 inner sides.Between trim ring construction section 14 and the rotary wheel base section of cooperation 11, be spinning roller construction section 13, and this spinning roller construction section 13 have with the rotary wheel base section of cooperation 11 adjoiners the positioning boss 12 radially protruding.Spinning roller 9 is sleeved on the spinning roller construction section 13 of spinning roller mandrel 8, and is fixed by screws on the end face of positioning boss 12.Pair of horns contact bearing 6 is sleeved on trim ring construction section 14; Fixed cover 4 is sleeved on the excircle of described pair of horns contact bearing 6; Trim ring 5 is sleeved on the excircle of fixed cover 4.Marking closely nut 2 suits marks closely on nut construction section 15.Bearing (ball) cover 1 is positioned at spinning roller mandrel 8 end of marking closely nut 2 one end, and is connected by screw 3 and fixed cover 4 and trim ring 5.
Spinning roller mandrel 8, spinning roller 9 and trim ring 5 are hollow revolving body, and the dead in line of spinning roller mandrel 8, spinning roller 9 and trim ring 5.Described spinning roller mandrel 8, spinning roller 9 and trim ring 5 together axially do feed motion along core under the effect of rotary wheel base feed mechanism.Wherein spinning roller mandrel 8 and spinning roller 9 synchronously rotate, and trim ring 5 does independently and freely rotates.
The rotary wheel base of spinning roller mandrel coordinates section 11 to match with the rotary wheel base installing hole of spinning machine.Spinning roller 9 is arranged on the spinning roller construction section 13 of spinning roller mandrel, and with the end face laminating of the positioning boss 12 of spinning roller mandrel.Trim ring 5 is assembled on the trim ring construction section 14 of spinning roller mandrel by fixed cover 4, angular contact bearing 6 and sleeve 7.Described spinning roller mandrel 8 is Pyatyi multidiameter, has formed respectively rotary wheel base and has coordinated section 11, positioning boss 12, spinning roller construction section 13, trim ring construction section 14 and mark closely nut construction section 15.Wherein, rotary wheel base coordinates the diameter of section 11 to match with the rotary wheel base installing hole of spinning machine, and is installed on rotary wheel base by self-aligning roller bearing.The axial length of positioning boss 12 is 21mm, diameter is 72mm, one end face laminating of the shaft shoulder forming with spinning roller construction section 13 and spinning roller 9, form spinning roller 9 along the axial installation locating surface of mandrel, and on the end face of this positioning boss 12, have 6 dark countersunk head screwed holes for 10mm, for by affixed to spinning roller 9 and this positioning boss 12.The diameter of the spinning roller construction section 13 of spinning roller mandrel is identical with the diameter of spinning roller 9 centre bores, for coordinating with the installing hole of spinning roller 9, the length of spinning roller construction section 13 is 33.5mm, be slightly larger than the axial width of spinning roller 9, and spinning roller construction section 13 near one end of trim ring construction section 14 on cover be useful on the felt collar 10 of sealed rolling bearing 6.The diameter of the trim ring construction section 14 of spinning roller mandrel is slightly less than the diameter of spinning roller construction section 13, and it is that the ladder of 2～2.5mm is poor that the outer round surface of described trim ring construction section 14 and the outer round surface of spinning roller construction section 13 form height, and the end face of this ladder has formed the location shaft shoulder of orientation angle contact bearing 6.The diameter of trim ring construction section 14 also should be identical with the internal diameter of angular contact bearing 6 for matching with the inner surface of angular contact bearing 6, and the axial length of trim ring construction section 14 is identical with the axial length of fixed cover 4 direct tube sections.The diameter of marking closely nut construction section 15 of spinning roller mandrel is the diameter that 35mm is slightly less than trim ring construction section 14; The length of marking closely nut construction section 15 is 18mm, is slightly larger than the twice of locknut 2 axial lengths; Described nut construction section 15 surfaces of marking closely have external screw thread.
The double tapered roller that spinning roller 9 is used for power spinning of tube workpiece, its diameter is 103mm, and forming angle α is 25 °, and radius of corner is 3mm, and axial width is 25mm.
Spinning roller 9 is sleeved on spinning roller construction section 13 by the installing hole at its center.On the circumference of described spinning roller 9 end faces, be uniformly distributed the countersunk head screwed hole of six perforations, for spinning roller 9 being fixed on to the positioning boss 12 of spinning roller mandrel.
Sleeve 7 is cylindrical member.The internal diameter of this sleeve 7 is identical with the internal diameter of angular contact bearing 6, and identical with the external diameter of the trim ring construction section 14 of spinning roller mandrel.The thickness of sleeve 7 is 3mm, is slightly less than the thickness of bearing 6 inner rings; The length of sleeve 7 is 11mm, is slightly larger than the poor of the length of trim ring construction section 14 and the axial length of pair of horns contact bearing 6.Sleeve 7 and pair of horns contact bearing 6 are all sleeved on the trim ring construction section 14 of spinning roller mandrel, and sleeve 7 is between pair of horns contact bearing 6, fit with an inner ring end face of pair of horns contact bearing 6 respectively in the two ends of sleeve 7, for spacing to described pair of horns contact bearing 6.
Angular contact bearing 6 is for realizing the independent rotation of spinning roller mandrel 8 and trim ring 5, and can bear certain radial load and axial load.The internal diameter of pair of horns contact bearing 6 is 40mm, and its inner surface coordinates with the trim ring construction section 14 of spinning roller mandrel.The external diameter of pair of horns contact bearing 6 is 68mm, and its outer surface coordinates with the internal diameter of fixed cover 4.The axial width of single angular contact bearing 6 is 15mm.The inner ring end face of described pair of horns contact bearing 6 is by fitting and realize the axial restraint of angular contact bearing 6 inner rings with the end face of sleeve 7, the location shaft shoulder and locknut 2.Be connected by the bolt between fixed cover 4 and and the laminating of the cycle surface of angular contact bearing 6 and bearing (ball) cover 1 of the end face of bearing (ball) cover 1, fixed cover 4 and trim ring 5 axial restraint of realizing bearing (ball) cover 1, fixed cover 4, trim ring 5 and angular contact bearing outer ring.
Fixed cover 4 is for the axial restraint of 5 one directions of trim ring, simultaneously also for sealed rolling bearing 6.Described fixed cover 4 is cylindrical member.There is the stepped through hole of perforation at the end plate center of these fixed cover 4 one end.The inner surface of this installing hole is stepped.The small-bore of described stepped through hole is 44.5mm, coordinates with the diameter of the spinning roller construction section 13 of spinning roller mandrel.The large aperture place of described stepped through hole is used for laying felt collar 10.The other end of this fixed cover 4 is opening end, has the flange radially protruding at the external peripheral surface of this opening end, is distributed with the tapped through hole being connected with flange and the trim ring 5 of bearing (ball) cover 1 on flange.
The external diameter of fixed cover 4 is 78mm, with the inner surface laminating of trim ring 5.The internal diameter of fixed cover 4 is 68mm, matches with the outer surface of angular contact bearing 6.The direct tube section length of fixed cover 4 is 51mm, is about the length of trim ring 5.The bottom shaft section of fixed cover 4 is three grades of stairsteppings.Bottom installing hole by fixed cover 4 is sleeved on fixed cover 4 on the spinning roller construction section 13 of spinning roller mandrel, and overlap at the intermediate step place of fixed cover 4 felt collar 10 that is useful on sealed rolling bearing 6, the step end face of the interior end of fixed cover 4 and the laminating of the end face of angular contact bearing 6 outer rings, for the axial location of angular contact bearing 6 one end.
d
p=d
r-2Δt-(0.2～0.4)t
0（1）
Wherein, d
pfor trim ring external diameter, d
rfor spinning roller diameter, Δ t is passage attenuate amount, t
0for the initial wall thickness of tubular blank.
In the present embodiment, d
p=99.7mm.
Bearing (ball) cover 1 is band bottomless drum shape part, and has a flange at its barrel middle part.On this flange, be evenly equipped with the through hole being connected with fixed cover 4 and trim ring 5.Bearing (ball) cover 1 for the axial restraint of trim ring 5 simultaneously also for sealed rolling bearing 6.The end face of the end face of bearing (ball) cover 1 and angular contact bearing 6 outer rings fits.The height of bearing (ball) cover 1 is 23mm, is greater than spinning roller mandrel and marks closely the length of nut construction section 15 and make it will mark closely nut construction section 15 to be closed in mechanism.
The assembling process of the present embodiment is as follows:
The first step: spinning roller 9 is enclosed within on the spinning roller construction section 13 of spinning roller mandrel, and its end face being connected with the positioning boss 12 of spinning roller mandrel and the positioning boss 12 of spinning roller mandrel are fitted, then with bolt, spinning roller 9 is connected with the positioning boss 12 of spinning roller mandrel.
Second step: trim ring 5 is enclosed within on the trim ring construction section 14 of spinning roller mandrel, then within the fixed cover with felt collar 10 4 being embedded in to trim ring 5, on the spinning roller construction section 13 of spinning roller mandrel, and the corresponding end face of trim ring 5 end face with threaded hole and fixed cover 4 is fitted felt sleeve.
The 3rd step: an angular contact bearing 6 is enclosed within on the trim ring construction section 14 of spinning roller mandrel and make its inner ring end face and spinning roller mandrel the 3 13, the shaft shoulder that forms of level Four axle 14 fits, and its cycle surface is fitted with the corresponding end face of fixed cover 4.And then successively sleeve 7 and another angular contact bearing 6 are enclosed within on the trim ring construction section 14 of spinning roller mandrel sleeve 7 is placed between the inner ring end face of pair of horns contact bearing 6.
The 4th step: two locknuts 2 are screwed on the screw thread of marking closely nut construction section 15 of spinning roller mandrel, and make it fasten the inner ring of angular contact bearing 6.
The 5th step: bearing (ball) cover 1 is installed, is made the cycle surface laminating of its vertical wall section end face and bearing 6, the outer face of the end face of flange section and fixed cover 4 fits.
The 6th step: by the screwed hole of bearing (ball) cover 1, fixed cover 4 and trim ring 5, three is tightened together with hex bolts 3.
Claims (2)
1. for a mechanism for cylindrical member forward spinning, it is characterized in that, comprise spinning roller mandrel, spinning roller, trim ring, fixed cover, sleeve, pair of horns contact bearing and bearing (ball) cover; Wherein:
A. described spinning roller mandrel is Pyatyi multidiameter, has formed respectively rotary wheel base and has coordinated section, positioning boss, spinning roller construction section, trim ring construction section and mark closely nut construction section; Mark closely one end that nut construction section is positioned at spinning roller mandrel, rotary wheel base coordinates section to be positioned at the other end of spinning roller mandrel; Trim ring construction section is positioned at marks closely nut construction section inner side; Spinning roller construction section is between trim ring construction section and the rotary wheel base section of cooperation, and this spinning roller construction section has with the rotary wheel base section of cooperation adjoiner the positioning boss radially protruding;
B. the rotary wheel base of spinning machine is sleeved in the rotary wheel base cooperation section of spinning roller mandrel; Spinning roller is arranged on the spinning roller construction section of spinning roller mandrel, and is fixed on the end face of positioning boss of spinning roller mandrel; Fixed cover is sleeved on trim ring construction section by pair of horns contact bearing, and trim ring is sleeved on the excircle of fixed cover; Marking closely nut sleeve loads on nail nut construction section; The dead in line of spinning roller mandrel, spinning roller and trim ring;
C. the length of trim ring is 10～20 times of blank wall thickness, and the external diameter of trim ring is determined by formula (1):
d
p=d
r-2Δt-(0.2～0.4)t
0（1）
Wherein, d
pfor trim ring external diameter, d
rfor spinning roller diameter, Δ t is passage attenuate amount, t
0for the initial wall thickness of tubular blank.
2. a kind of mechanism for cylindrical member forward spinning as claimed in claim 1, it is characterized in that, there is stepped through hole at the end plate center of fixed cover one end, and the aperture of fixed cover aperture coordinates with the diameter of the spinning roller construction section of spinning roller mandrel, in fixed cover macropore, lays felt collar; The external peripheral surface of the fixed cover other end has the flange radially protruding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210144751.1A CN102688927B (en) | 2012-05-11 | 2012-05-11 | Forward spinning mechanism for cylindrical member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210144751.1A CN102688927B (en) | 2012-05-11 | 2012-05-11 | Forward spinning mechanism for cylindrical member |
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| Publication Number | Publication Date |
|---|---|
| CN102688927A CN102688927A (en) | 2012-09-26 |
| CN102688927B true CN102688927B (en) | 2014-06-18 |
Family
ID=46854757
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210144751.1A Active CN102688927B (en) | 2012-05-11 | 2012-05-11 | Forward spinning mechanism for cylindrical member |
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| CN (1) | CN102688927B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157716A (en) * | 2013-04-07 | 2013-06-19 | 吉林大学 | Spinning and forming device of cylindrical part with inner strengthening and outer thinning |
| CN103331369B (en) * | 2013-06-13 | 2015-04-29 | 成都中电锦江信息产业有限公司 | Shell-type knurl wheel for channelling machine |
| CN112733250A (en) * | 2020-12-20 | 2021-04-30 | 西安航天动力机械有限公司 | Method for determining thinning amount of inner and outer spinning wheels in spinning of cylindrical part |
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| JP2006095536A (en) * | 2004-09-28 | 2006-04-13 | Topy Ind Ltd | Pressing roller device for spinning processing |
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| DE3817818A1 (en) * | 1988-05-26 | 1989-11-30 | Bohner & Koehle | Roller holder for the spinning roller of a spinning machine |
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