CN102107230B - Shaping device for preparing bent tube by virtue of differential-velocity extrusion of dual male dies - Google Patents
Shaping device for preparing bent tube by virtue of differential-velocity extrusion of dual male dies Download PDFInfo
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- CN102107230B CN102107230B CN 201010528713 CN201010528713A CN102107230B CN 102107230 B CN102107230 B CN 102107230B CN 201010528713 CN201010528713 CN 201010528713 CN 201010528713 A CN201010528713 A CN 201010528713A CN 102107230 B CN102107230 B CN 102107230B
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Abstract
The invention relates to a shaping device for preparing a bent tube by virtue of differential-velocity extrusion of dual male dies. The extrusion shaping device comprises a mould molding part, a mould fixing part and a mould guide part; the mould molding part comprises a female die, male dies, a core shaft and an extruding block; the mould fixing part comprises a pedestal fixing board, a support base, a sliding board and a female die fixing board; and the mould guide part comprises a guide column, a guide sleeve, a top board and a pedestal fixing board. The shaping device has the advantage that the mould uses horizontal type extruding, thus the length range of the extruded bent tube is enlarged; the female die and female die fixing board of the mould shaping part are both in a block type, which is convenient for taking out of the workpiece after the extruding and extruding the blank again; the core shaft fixing board is guided through the guide rod and a dovetail groove and is ejected out through screw by hands; the center lines of the female die, the male dies and the core shaft are on the same straight line so that the device is convenient to assemble and easy to adjust; the extruding speeds of the male dies A, B are changed to produce an extruding speed differentia value between the male dies A, B, wherein the differential value can be utilized to prepare the bent tube; the device is reasonable in structure and simple in technology; the thickness of the wall of the bent tube in uniform in wall thickness and smooth and has no cross section deformation; and the device is reliable in quality and wide in application prospect.
Description
Technical field
In the present invention relates to, the technology of preparing of thin-wall pipes bool, particularly a kind of device of crooked pipe fitting arbitrarily that adopts on double-convex-mold differential extrusion modling plane.
Background technology
Along with the development of molding equipment and manufacturing technology, the pipe bending part of complicated shape industrial circle particularly high in technological content industrial circle occur more and more frequent, as the oil transportation of aircraft, boats and ships, automobile, gas pipeline also has the part support.Because use bending pipe fitting to replace original wire rod or plastic pipe, can reduce weight, improve durability.Generally application along with pipe bending part, people are also more and more higher to the requirement of the bending quality of tubing and forming technology, the traditional handicraft method is as curved in pushing away, there are some defectives mostly in the bending pipe fitting of the productions such as roll bending, as the attenuate of lateral wall with break, the thickening of madial wall, the defectives such as wrinkling and distortion of cross section, and angle of bend and the direction of pipe fitting are limited, can not reach any bending.
Summary of the invention
The invention provides a kind of can be crooked to different directions in same plane, the angle of bend scope is 90 °～180 °, and the double-convex-mold differential extrusion forming device of the preparation pipe bending part that is controlled of angle of bend.
Technical scheme of the present invention is:
A kind of shaped device that adopts double-convex-mold differential extruding preparation pipe bending part, it is characterized in that: extrusion forming device comprises mould molding part, mould fixing part and targeting part; Mould molding partly comprises die, punch, mandrel and crushing block, and it is cylindrical that concave die cavity top is divided into, and discharge end is the frustum of a cone, punch is that semi-annular shape (is seen Fig. 5-f), die, the center line of punch, blank center line overlap with the plug center line, and blank is to expect with one heart; Mould fixing part comprises base fixing plate, supporting seat, slide plate, die block, die block has dovetail groove, is slidably matched between slide plate and fixed head, and die block is connected with die, half of die block is fixed on base fixing plate, and base fixing plate is fixed on gripper shoe; The center of base fixing plate is provided with discharging opening, and mould molding partly is positioned at die block, and mandrel is embedded in slide plate, and the plug lower end is positioned at die conical outlet place; Targeting part comprises lead, guide pin bushing, top board, base fixing plate, slide plate, and guide pin bushing is fixed in slide plate, joins for little gap cunning between lead and guide pin bushing, guarantees the accurate slip of slide plate.
The frustum of a cone of described die discharge end, tapering are 45 °～60 °, and frustum height h is 15mm～30mm, and the recipient height is columniform height H 〉=50mm in concave die cavity.
Bending pipe fitting wall thickness 3mm 〉=t 〉=0.5mm; Angle of bend is 180 ° 〉=α 〉=90 °.
The height of setting punch A is H
A, the height of punch B is H
B, the height of blank is H, the speed of punch A is V
A, the speed of punch B is V
B, must satisfy:
V
A＞V
BThe time,
V
B＞V
AThe time,
Speed difference between punch A and the punch B time with the whole blank of fireballing punch extruding on duty must be less than the height of slow-footed punch.
Die, the die block of described mould molding part all adopt block form, are convenient to push the taking-up of workpiece after completing and the extruding again of blank.
Operation principle of the present invention:
The present invention, is applied to extruding force respectively on punch A and B by hydraulic means the metal stock moulding by the double-convex-mold differential extrusion forming device, and punch A and B obtain different speed under the effect of extruding force separately.Punch A, B are to the motion of blank direction, extrusion billet.Because the movement velocity of punch A, B is different, so the power that punch A, B are squeezed on blank is also different, the blank two ends that contacts with B from punch A are stressed different, so also difference of the Material Flow speed at blank two ends.There is a speed difference between punch A and B, produced an inhomogeneous velocity field in the process that the blank that makes their act on is extruded downwards.This inhomogeneous velocity field shows that the flow velocity of each particle when material flows out is different, and the speed difference of each material particle has caused the bending of pipe when flowing out.By controlling metal material and flowing uneven namely controls the speed difference between punch A and punch B, and be crooked arbitrarily in can the moulding same plane, difform pipe bending part.
Advantage of the present invention is: mould adopts horizontal type extruding, has improved the length range of extruding bending pipe fitting.The die of mould molding part, die block all adopts block form, is convenient to push the taking-up of workpiece after completing and the extruding again of blank.The mandrel fixed head is by guide post and dovetail groove guiding, by screw rod by manually ejecting.Die and punch, mandrel center line point-blank, easy to assembly being easy to adjusted.By changing the extrusion speed of punch A, B, make the extrusion speed difference between punch A, B, utilize this difference to prepare pipe bending part, this apparatus structure is reasonable, technique is simple, the pipe bending part wall thickness is even and wrinkle resistant, cross section is undistorted, reliable in quality is with a wide range of applications.
Description of drawings
Fig. 1, Fig. 2 are the apparatus structure schematic diagram of any bending pipe fitting in double-convex-mold differential extrusion modling plane.
Fig. 3, Fig. 4 are the device A-A generalized section of any bending pipe fitting in double-convex-mold differential extrusion modling plane.
Fig. 5 is the typical part perspective view.
In Fig. 1-4: 1. lead 2. base fixing plate 3. die plate inserts 1,2 4. blank 5. crushing block A, B 6. die blocks 1,2 7. slide plate 8. guide pin bushings-1 9. lead 10. top board 11. punch A, B 12. screws-1 13. supporting seat 14. screw rod 15. screw rod fixed head 16. round pin nail-1 17. screw-2 18. hex nut 19. mandrel 20. screws-3 21. screw-3 22. guide pin bushing-2 23. guide pillar 24. screws-4 25. screw-5 26. round pin nail-2 27. round pins follow closely-3
In Fig. 5: Fig. 5-a die plate insert 1; Fig. 5-b die plate insert 2; 5-c die plate insert constitutional diagram; The 5-d blank;
Fig. 5-e crushing block combination; Fig. 5-f punch figure; The 5-g mandrel; Fig. 5-h slide plate
The specific embodiment
Embodiment 1:
The shaped device of double-convex-mold differential extruding preparation pipe bending part, extrusion forming device comprises mould molding part, mould fixing part and targeting part; Mould molding partly comprises die plate insert 1 and 2, mandrel 19 and crushing block A and B, die plate insert 1,2 is separately fixed on die block 1 and 2 by screw 24 and pin 25, punch is comprised of two semi-annular shape cylinders, the die that die plate insert forms, the geometric center lines of mandrel and punch is positioned at the same straight line after die assembly; Mould fixing part comprises base fixing plate 2, supporting seat 13, slide plate 7, die block 6, on die block 6-2, dovetail groove is arranged, between slide plate 7 and die block for being slidably matched, die block 6-2 is fixed on base fixing plate 2 by screw 21 and pin 27,2 of base fixing plates are fixed on supporting seat 13 by screw 17 and pin 16, base fixing plate 2, supporting seat 13, slide plate 7, die block 6 during processing and manufacturing, the demanding flatness of contact-making surface between them and the depth of parallelism guarantee accurate location and the operation of mould.The guiding of mould has two kinds of forms, is respectively dovetail groove and guide pillar, guide pin bushing.Mandrel 19 is fixed on slide plate 7, and slide plate 7 enters in concave die cavity mandrel by the slip of dovetail groove and lead 9 and guide pin bushing 8 accurately.Sectional type die block 6-1 and 6-2 are by to guide pillar 23 and guide pin bushing 23 guiding, and be fastening by screw 24.Die plate insert, die block are made the taking-up of depositing in workpiece that sectional type is convenient to blank.Mould pressurizing is partly punch and crushing block, when the hydraulic press plunger carries the punch operation, at first punch enters the slide plate of fixed central spindle, it is little matched in clearance between mould lead and guide pin bushing, guarantee accurately slipping into of punch, after punch contacted with extruding is fast, the crushing block extrusion billet made it to produce plastic deformation.
In the present embodiment, the internal diameter of bend pipe is 20mm, and wall thickness is 3mm, and blank is 5052 aluminium alloys, and the tapering of die discharge end is 59 °, and spherical radius is 20mm, and the pressure of hydraulic press is 100t, and there is centre bore at the blank center, and temperature is room temperature.
The working procedure of the present embodiment is: after final-assembly die is completed and is fixed on horizontal hydraulic machine, blank 4 is put into die plate insert 3, mandrel 19 upper ends are fixed on slide plate 7, and the port of export that crushing block 5 and blank 4 are positioned at die plate insert 3 is passed in plug 19 lower ends; Punch 11-A and 11-B accept the loading of hydraulic press, act on blank 4 by crushing block 5-A and 5-B, to act on punch 11-A different with the loading on 11-B due to the horizontal hydraulic machine that begins to set, and make punch 11-A and 11-B obtain different extrusion speed under the effect of different extruding forces.Punch 11-A and 11-B are to the motion of blank direction, extrusion billet.Because the movement velocity of punch A, B is different, so the power that punch A, B are squeezed on blank is also different, the blank two ends that contacts with B from punch A are stressed different, so also difference of the Material Flow speed at blank two ends.There is a speed difference between punch A and B, produced an inhomogeneous velocity field in the process that the blank that makes their act on is extruded downwards.This inhomogeneous velocity field shows that the flow velocity of each particle when material flows out is different, and the speed difference of each material particle has caused the bending of pipe when flowing out.The speed difference between punch A and punch B is namely controlled in the uneven field of flowing by controlling metal material, makes tubing bend, thereby obtains our needed pipe bending part.
The pipe bending part wall thickness of the present embodiment preparation is even and wrinkle resistant, cross section is undistorted, has a extensive future.
Claims (1)
1. a double-convex-mold differential pushes the shaped device for preparing pipe bending part, it is characterized in that: extrusion forming device comprises mould molding part, mould fixing part and targeting part; Mould molding partly comprises die, punch, mandrel and crushing block, and it is cylindrical that concave die cavity top is divided into, and discharge end is the frustum of a cone, and punch is semi-annular shape, die, and the center line of punch, blank center line overlap with the plug center line, and blank is material with one heart; Mould fixing part comprises base fixing plate, supporting seat, slide plate, die block, die block has dovetail groove, be slidably matched between slide plate and die block, die block is connected with die, half of die block is fixed on base fixing plate, and base fixing plate is fixed on gripper shoe; The center of base fixing plate is provided with discharging opening, and mould molding partly is positioned at die block, and mandrel is embedded in slide plate, and the plug lower end is positioned at die conical outlet place; Targeting part comprises lead, guide pin bushing, top board, base fixing plate, slide plate, and guide pin bushing is fixed in slide plate, joins for little gap cunning between lead and guide pin bushing; The height of setting punch A is H
A, the height of punch B is H
B, the height of blank is H, the speed of punch A is V
A, the speed of punch B is V
B, must satisfy:
V
A＞V
BThe time,
V
B＞V
AThe time,
The frustum of a cone of described die discharge end, tapering are 45 °～60 °, and frustum height h is 15mm～30mm, and the recipient height is columniform height H 〉=50mm in concave die cavity;
The device moulding bending pipe fitting wall thickness 3mm 〉=t of institute 〉=0.5mm; Angle of bend is 180 °＞α 〉=90 °;
Die, the die block of described mould molding part all adopt block form, are convenient to push the taking-up of workpiece after completing and the extruding again of blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010528713 CN102107230B (en) | 2010-11-03 | 2010-11-03 | Shaping device for preparing bent tube by virtue of differential-velocity extrusion of dual male dies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010528713 CN102107230B (en) | 2010-11-03 | 2010-11-03 | Shaping device for preparing bent tube by virtue of differential-velocity extrusion of dual male dies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102107230A CN102107230A (en) | 2011-06-29 |
| CN102107230B true CN102107230B (en) | 2013-06-12 |
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|---|---|---|---|
| CN 201010528713 Expired - Fee Related CN102107230B (en) | 2010-11-03 | 2010-11-03 | Shaping device for preparing bent tube by virtue of differential-velocity extrusion of dual male dies |
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Families Citing this family (6)
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|---|---|---|---|---|
| CN104550289B (en) * | 2014-12-30 | 2018-08-28 | 天津理工大学 | The method of extrusion forming curvature of space tubing of more punch-pin |
| CN111283008B (en) * | 2020-02-26 | 2020-11-27 | 凯维思轻量化智能制造研究院(菏泽)有限公司 | Manufacturing method of multilayer bending structure |
| CN112570482B (en) * | 2020-11-06 | 2022-09-27 | 哈尔滨理工大学 | Metal curvature section twisting extrusion forming device and method |
| CN113059011B (en) * | 2021-03-17 | 2022-05-31 | 中北大学 | Extrusion and stretching composite forming equipment for forming large conical cylinder |
| CN113059012B (en) * | 2021-03-17 | 2022-05-31 | 中北大学 | Extrusion-stretching composite forming method for large-height-diameter-ratio conical cylinder |
| CN113369325B (en) * | 2021-06-11 | 2022-08-09 | 中国兵器工业第五九研究所 | Extrusion forming process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036279A1 (en) * | 2000-11-01 | 2002-05-10 | Intai Jin | Hot metal extru-bending machine |
| WO2008131471A1 (en) * | 2007-04-30 | 2008-11-06 | Trumpf Maschinen Austria Gmbh & Co. Kg. | Bending machine comprising a cavity for a foot space |
| CN101693262A (en) * | 2009-10-23 | 2010-04-14 | 天津理工大学 | Method for preparing pipe bending part by adopting eccentric extrusion forming |
| CN101693263A (en) * | 2009-10-23 | 2010-04-14 | 天津理工大学 | Method for preparing pipe bending part by adopting flexible extrusion forming |
| CN202037198U (en) * | 2010-11-03 | 2011-11-16 | 天津理工大学 | Double-convex-mold differential extrusion molding device for preparing pipe bending piece |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63235019A (en) * | 1987-03-20 | 1988-09-30 | Hitachi Cable Ltd | Method for extrusion for metal tube |
| KR100364043B1 (en) * | 2000-06-10 | 2002-12-11 | 진인태 | A manufacturing device and method of the curved metal tube and rod with a arbitrary section |
-
2010
- 2010-11-03 CN CN 201010528713 patent/CN102107230B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002036279A1 (en) * | 2000-11-01 | 2002-05-10 | Intai Jin | Hot metal extru-bending machine |
| WO2008131471A1 (en) * | 2007-04-30 | 2008-11-06 | Trumpf Maschinen Austria Gmbh & Co. Kg. | Bending machine comprising a cavity for a foot space |
| CN101693262A (en) * | 2009-10-23 | 2010-04-14 | 天津理工大学 | Method for preparing pipe bending part by adopting eccentric extrusion forming |
| CN101693263A (en) * | 2009-10-23 | 2010-04-14 | 天津理工大学 | Method for preparing pipe bending part by adopting flexible extrusion forming |
| CN202037198U (en) * | 2010-11-03 | 2011-11-16 | 天津理工大学 | Double-convex-mold differential extrusion molding device for preparing pipe bending piece |
Non-Patent Citations (1)
| Title |
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| 宋继顺等.双凸模差速挤压方形弯曲管件工艺过程有限元模拟.《重型机械》.2010,(第2期), * |
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