CN103212598A - Tube blank bilateral reverse central spindle thrusting reducing die and process - Google Patents
Tube blank bilateral reverse central spindle thrusting reducing die and process Download PDFInfo
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- CN103212598A CN103212598A CN2013101917579A CN201310191757A CN103212598A CN 103212598 A CN103212598 A CN 103212598A CN 2013101917579 A CN2013101917579 A CN 2013101917579A CN 201310191757 A CN201310191757 A CN 201310191757A CN 103212598 A CN103212598 A CN 103212598A
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- mandrel
- undergauge
- die
- pipe
- right sides
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Abstract
The invention discloses a tube blank bilateral reverse central spindle thrusting reducing die and process. The process comprises the following steps that: in reducing, left and right reducing dies (9, 9/) are fed and reduced to the inner side of a tube blank (13) from the external end of the tube blank (13); meanwhile, a central spindle driving system pushes left and right central spindles (5, 5/) to do reverse motion to the external end of the tube blank (13) from the inner side of the tube blank (13); and after reduction, the left and right reducing dies (9, 9/) and the left and right central spindles (5, 5/) return, and a workpiece is fetched. The left reducing die assembly and the right reducing die assembly of the die are arranged between an upper template (11) and a lower die fixing plate (25), a left guide assembly and a right guide assembly are arranged at two sides of a lower fixing die (24), and the left central spindle assembly and the right central spindle assembly are respectively arranged in the left guide assembly and the right guide assembly. According to the invention, the central spindles are taken as parts for controlling the inside dimension of the tube blank, and a body of a self driving system hydraulic cylinder, the axial space of equipment is unnecessary to increase in reducing, and the amplification of deformation force is small in reducing, and after reducing, the increase of wall thickness of the tube blank is small and the inside dimension and outside dimension of the tube blank are high in precision.
Description
Technical field
The present invention relates to a kind of pipe plastic forming technology field, relate in particular to reverse mandrel pushing diameter reducing process of a kind of pipe bilateral and mould.
Background technology
The pushing undergauge be make pipe by taper matrix to reduce the manufacturing process of its external diameter, have or not mandrel can be divided into free diameter reducing during according to undergauge and the mandrel undergauge arranged.When freely pushing undergauge, the elongation of pipe length, wall thickness increase behind the undergauge, and the pipe diameter is less than the diameter of undergauge die sizing area, and there is warpage in pipe end, interior external diameter low precision.When mandrel pushing undergauge is arranged, can reduce pipe wall thickness increment, the mandrel not feeding of can floating, mandrel also can with undergauge die synchro-feed, but undergauge power significantly increases, and causes the pipe unstability easily.
Inside/outside diameter size precision for pipe behind the raising undergauge mainly contains two kinds of ways, and a kind of method is successively to carry out centreless undergauge and the crowded endoporus of mandrel on special hydraulic press, and another kind of method is to adopt the mandrel formula reducing die that floats.Special hydraulic press mainly is made up of master cylinder, auxiliary oil cylinder, undergauge die, crowded endoporus mandrel, main oil cylinder piston drives the undergauge die and carries out the centreless undergauge earlier, main oil cylinder piston pressurize then, auxiliary oil cylinder piston drive the mandrel motion and finish the whole footpath of pipe fitting endoporus, and master cylinder and auxiliary oil cylinder are successively return afterwards.Adopt this technology, the inside/outside diameter size difference can reach higher precision behind the pipe undergauge, but the machine tool structure complexity, operation precision requires high, and manufacture difficulty is big, cost is high.
Adopt when floating mandrel formula reducing die, use on common horizontal hydraulic machine, mould mainly is made up of oil cylinder piston, die, mandrel, elastic component, clamp, guide pin bushing.In the oil cylinder piston hole elastic component is housed, makes the outstanding undergauge die of mandrel insert pipe, mandrel can retreat with pipe during undergauge in theory, has guaranteed the tube blank size precision.The mandrel formula reducing die that floats is suitable for the reducing of light-wall pipe, and when the pipe diameter shrinkage part was longer, mandrel can not be followed pipe and retreated during undergauge, causes undergauge power to increase, and the pipe elongation reduces; In addition, the axial space of blowing, pickup needs is big.
Summary of the invention
Pipe wall thickness increment is big when freely pushing undergauge for solving long-armed pipe, the inside/outside diameter size precision is low, and undergauge power greatly, easily causes problems such as pipe unstability when mandrel pushing undergauge is arranged, the invention provides reverse mandrel pushing diameter reducing process of a kind of pipe bilateral and mould, the quality of wall thickness increment and undergauge pipe is effectively controlled in this invention.
The technical solution adopted for the present invention to solve the technical problems is: the reverse mandrel pushing of a kind of pipe bilateral undergauge mould comprises cope match-plate pattern, last fixed die, following fixed die, counterdie fixed head, lower bolster, left and right sides undergauge die assembly, left and right sides guidance set and left and right sides mandrel component.Described upward fixed die, following fixed die are the flanged (FLGD) semicylinders in two ends, are installed in respectively in cope match-plate pattern and the counterdie fixed head; The counterdie fixed head passes through screw
, the key piece is connected on the lower bolster, between cope match-plate pattern and the lower bolster by guide pillar, guide pin bushing guiding.Left and right sides undergauge die assembly is installed between cope match-plate pattern and the counterdie fixed head, and left and right sides guidance set is arranged on down the both sides of fixed die, and left and right sides mandrel component is installed in respectively in the guidance set of the left and right sides.
Described left and right sides undergauge die assembly is made up of left and right sides undergauge die, left and right sides die body, left and right sides die carrying cylinder, left and right sides template respectively, the interference of left and right undergauge die is assemblied in the left and right die body, one end of left and right die carrying cylinder is by the left and right die body of screw attachment, and the other end is fixed on the left and right side template by screw.
Described left and right sides guidance set is made up of forward and backward guide plate, forward and backward guide runner respectively, forward and backward guide plate is contained in the T-slot that is provided with on the forward and backward two side of counterdie fixed head, three spigot surfaces are set on the forward and backward guide plate, forward and backward guide runner is installed in the cell body of left and right undergauge die body front and back side processing, and slides on the spigot surface of forward and backward guide plate.
Described left and right sides mandrel component is respectively by left and right sides mandrel, left and right sides piston, left and right sides end cap, left and right sides piston tube joint, left and right sides end cap pipe joint, sealing ring
, sealing ring
And sealing ring
Form, left and right mandrel one end has flange and slides in left and right die carrying cylinder by flange, and flange end is equipped with left and right end cap, and an end of left and right piston is connected on the left and right side template, and the other end slides in left and right mandrel.
A kind of technology of using the reverse mandrel pushing of pipe bilateral undergauge mould, the reverse mandrel pushing of described bilateral diameter reducing process uses on the three-dimensional hydraulic press, and its concrete steps are as follows:
Step 1) clamping pipe:
The pipe that both sides are coated with lubricating fluid is placed under the undergauge mould on the fixed die, and three-dimensional hydraulic press top shoe drives to be gone up fixed die and depress, in the middle part of last fixed die and the common clamping pipe of following fixed die.
Step 2) insert mandrel:
Before the undergauge, the mandrel drive system pushes pipe inside with a left side (right side) mandrel, and a left side (right side) mandrel is inserted the length of pipe should be greater than 1.15 times of undergauge section length, the external diameter an of left side (right side) mandrel according to undergauge after the internal diameter that requires of pipe determine.
The step 3) undergauge:
A three-dimensional hydraulic press left side (right side) slide block drive a left side (right side) undergauge die by the pipe outer end to the inside the worker advance, undergauge; Simultaneously, the mandrel drive system drives a left side (right side) mandrel by interior lateral outer end counter motion, and speed is greater than the elongation speed of undergauge pipe.
The backhaul of step 4) three-dimensional hydraulic press:
Three-dimensional hydraulic press left and right sides slide block drives left and right sides undergauge die backhaul, the mandrel drive system drives left and right sides mandrel backhaul, and three-dimensional hydraulic press top shoe drives the upper mould fixed plate backhaul.
The step 5) pickup:
Left and right sides push rod in the three-dimensional hydraulic press sliding block ejects pipe, pickup.
The invention has the beneficial effects as follows: the wall thickness value added is little behind the pipe undergauge, and undergauge power amplification is little, can not cause the pipe unstability.Undergauge die and mandrel alignment height guarantee pipe inside/outside diameter size precision height.Easy to operate, need not strengthen the hydraulic press axial space.
Description of drawings
Fig. 1 is the schematic diagram of pipe behind reverse mandrel pushing undergauge mould of pipe bilateral and the technology undergauge;
Fig. 2 is the front view of the reverse mandrel pushing of pipe bilateral undergauge mould undergauge mould;
Fig. 3 is the profile in the reverse mandrel pushing of pipe bilateral undergauge mode host visual pattern C-C cross section;
Fig. 4 is the profile in the reverse mandrel pushing of pipe bilateral undergauge mode host visual pattern D-D cross section;
Fig. 5 is the vertical view of the reverse mandrel pushing of pipe bilateral undergauge mould undergauge mould;
Fig. 6 is the mode host visual pattern when mandrel is inserted pipe before the reverse mandrel pushing of the pipe bilateral undergauge mould process undergauge;
Fig. 7 is the front view of mould after the backhaul of the reverse mandrel pushing of pipe bilateral diameter reducing process mandrel.
Among the above-mentioned figure, 1,1
/. left and right side template, 2,2
/. left and right piston tube joint, 3,3
/. left and right end cap, 4,4
/. left and right end cap pipe joint, 5,5
/. left and right mandrel, 6,6
/. left and right piston, 7,7
/. left and right die carrying cylinder, 8,8
/. left and right die body, 9,9
/. left and right undergauge die, 10. screw
, 11. cope match-plate patterns, fixed die on 12., 13. pipes, 14. screws
, 15. screws
, 16. sealing rings
, 17. sealing rings
, 18. screws
, 19. screws
, 20. screws
, 21. sealing rings
, 22,22
/. left and right push rod, 23. key pieces, 24. times fixed dies, 25. counterdie fixed heads, 26. lower bolsters, 27. guide pillars, 28. guide pin bushings, 29,29
/. forward and backward guide plate, 30,30
/. forward and backward guide runner, 31. screws
, 32. screws
, 33. screws
The specific embodiment
Embodiment
Fig. 1 is the schematic diagram of pipe behind the undergauge of the embodiment of the invention, the seamless cylindrical steel tube of selecting for use, outside diameter d
0=180mm, wall thickness t
0=8mm, length is 1395mm.Behind the undergauge of pipe both sides, outside diameter d
1=162mm, wall thickness t
1=8.3mm, length L
1=1435mm, wherein the undergauge section length of both sides is respectively 420mm.
The reverse mandrel pushing of the pipe bilateral of embodiment of the invention diameter reducing process comprises the steps:
1) clamping pipe:
The pipe 13 that both sides are coated with saponification liquor is placed under the undergauge mould on the fixed die 25, and the left and right slide block of three-dimensional hydraulic press drives left and right undergauge die assembly axial feed, and the hydraulic press top shoe drives to be gone up fixed die 12 and depress clamping pipe 13 middle parts.
2) insert mandrel:
Left and right mandrel (5,5
/) external diameter equal Φ 141.3mm, its motion is driven by hydraulic system.Left and right piston tube joint (2,2
/) oiling, left and right end cap pipe joint (4,4
/) oil return, left and right mandrel (5,5
/) insert pipe 13 inside, the length that mandrel is inserted in the pipe is 450mm, position as shown in Figure 6.
3) undergauge:
The left and right slide block of hydraulic press drives left and right undergauge die (8,8
/) axially the worker advance to realize undergauge, work speed is v
1Be 25mm/s; Simultaneously, left and right piston (6,6
/) follow undergauge die assembly together the worker advance left and right piston tube joint (2,2
/) oil return, left and right end cap pipe joint (4,4
/) oiling, the oiling flow should satisfy left and right mandrel (5,5
/) counter motion from inside to outside, movement velocity is v
2=3mm/s.
4) hydraulic press backhaul:
The left and right slide block of three-dimensional hydraulic press drives the backhaul of left and right undergauge die assembly, left and right mandrel (5,5
/) backhaul is to position shown in Figure 7, three-dimensional hydraulic press top shoe drives goes up fixed die 12 backhauls.
5) pickup:
Push rod 22,22 in the hydraulic press sliding block 26
/ Eject pipe 13, pickup.
The mould that the reverse mandrel pushing of the pipe bilateral of embodiment of the invention diameter reducing process uses is made up of cope match-plate pattern 11, last fixed die 12, following fixed die 24, counterdie fixed head 25, lower bolster 26 and left and right sides undergauge die assembly, left and right sides guidance set and left and right sides mandrel component etc.Described upward fixed die 12, following fixed die 24 are the flanged (FLGD) semicylinders in two ends, are installed in respectively in cope match-plate pattern 11, the counterdie fixed head 25.Counterdie fixed head 25 passes through screw
33, key piece 23 is connected on the lower bolster 26.Lead by guide pillar 27, guide pin bushing 28 between cope match-plate pattern 11 and the lower bolster 26.Left and right sides undergauge die assembly is installed between cope match-plate pattern 11 and the counterdie fixed head 25, and left and right sides guidance set is arranged on down the both sides of fixed die 24, and left and right sides mandrel component is installed in respectively in the guidance set of the left and right sides.
Described left and right sides undergauge die assembly is respectively by left and right sides undergauge die (9,9
/), left and right sides die body (8,8
/), left and right sides die carrying cylinder (7,7
/), left and right sides template (1,1
/) wait composition.Left and right undergauge die (9,9
/) interference is assemblied in left and right die body (8,8
/) in.Left and right die carrying cylinder (7,7
/) an end by the left and right die body (8,8 of screw attachment
/), the other end is fixed on side template left and right (1,1 by screw
/) on.
Described left and right sides guidance set is arranged on down the both sides of fixed die 24, respectively by front and back guide plate (29,29
/), front and back guide runner (30,30
/) form.Front and back guide plate (29,29
/) be contained in the T-slot that is provided with on the two side, counterdie fixed head 25 front and back front and back guide plate (29,29
/) on three spigot surfaces are set.Forward and backward guide runner (30,30
/) be installed in left and right undergauge die body (8,8
/) before and after in the cell body of side processing, and at forward and backward guide plate (29,29
/) spigot surface on slide.
Described left and right sides mandrel component is respectively by left and right sides mandrel (5,5
/), left and right sides piston (6,6
/), left and right sides end cap (3,3
/), left and right sides piston tube joint (2,2
/), left and right sides end cap pipe joint (4,4
/) and sealing ring
16, sealing ring
17 and sealing ring
21 form.Left and right sides mandrel (5,5
/) end have flange and by flange at left and right sides die carrying cylinder (7,7
/) the interior slip, flange end is equipped with left and right sides end cap (3,3
/).Left and right sides piston (6,6
/) an end be connected left and right sides template (1,1
/) on, the other end is at left and right sides mandrel (5,5
/) the interior slip.
Claims (4)
1. the reverse mandrel of pipe bilateral pushes the undergauge mould, comprise cope match-plate pattern (11), last fixed die (12), following fixed die (24), counterdie fixed head (25), lower bolster (26), left and right sides undergauge die assembly, left and right sides guidance set and left and right sides mandrel component, it is characterized in that: described upward fixed die (12), following fixed die (24) are the flanged (FLGD) semicylinder in two ends, are installed in respectively in cope match-plate pattern (11) and the counterdie fixed head (25); Counterdie fixed head (25) passes through screw
(33), key piece (23) is connected on the lower bolster (26), between cope match-plate pattern (11) and the lower bolster (26) by guide pillar (27), guide pin bushing (28) guiding; Left and right sides undergauge die assembly is installed between cope match-plate pattern (11) and the counterdie fixed head (25), and left and right sides guidance set is arranged on down the both sides of fixed die (24), and left and right sides mandrel component is installed in respectively in the guidance set of the left and right sides.
2. the reverse mandrel pushing of pipe bilateral according to claim 1 undergauge mould, it is characterized in that: described left and right sides guidance set is arranged on down the both sides of fixed die (24), respectively by forward and backward guide plate (29,29
/), forward and backward guide runner (30,30
/) form forward and backward guide plate (29,29
/) be contained in the T-slot that is provided with on the counterdie fixed head 25 forward and backward two sides forward and backward guide plate (29,29
/) on three spigot surfaces are set, forward and backward guide runner (30,30
/) be installed in left and right undergauge die body (8,8
/) before and after in the cell body of side processing, and at forward and backward guide plate (29,29
/) spigot surface on slide.
3. the reverse mandrel pushing of pipe bilateral according to claim 1 undergauge mould is characterized in that:
3.Described left and right sides mandrel component is respectively by left and right mandrel (5,5
/), left and right piston (6,6
/), left and right end cap (3,3
/), left and right piston tube joint (2,2
/), left and right end cap pipe joint (4,4
/), sealing ring
16, sealing ring
17 and sealing ring
21 form left and right mandrel (5,5
/) end have flange and by flange at left and right die carrying cylinder (7,7
/) the interior slip, flange end is equipped with left and right end cap (3,3
/), left and right piston (6,6
/) an end be connected left and right side template (1,1
/) on, the other end is at left and right mandrel (5,5
/) the interior slip.
4. technology of using the reverse mandrel pushing of pipe bilateral as claimed in claim 1 undergauge mould, it is characterized in that: the reverse mandrel pushing of described bilateral diameter reducing process uses on the three-dimensional hydraulic press, and its concrete steps are as follows:
Step 1) clamping pipe: the pipe (13) that both sides is coated with lubricating fluid is placed on the fixed die under the undergauge mould (24), the drive of three-dimensional hydraulic press top shoe is gone up fixed die (12) and is depressed, the middle part of the common clamping pipe (13) of last fixed die (12) and following fixed die (24);
Step 2) insert mandrel:
Before the undergauge, the mandrel drive system is with left and right mandrel (5,5
/) push pipe (13) inside, left and right mandrel (5,5
/) length inserted is greater than 1.15 times of pipe (13) undergauge section length, left and right mandrel (5,5
/) external diameter according to undergauge after the internal diameter that requires of pipe determine;
The step 3) undergauge:
The left and right slide block of three-dimensional hydraulic press drives left and right undergauge die (9,9
/) by the outer end of pipe (13) to the inside the worker advance, undergauge; Simultaneously, the mandrel drive system drives left and right mandrel (5,5
/) by interior lateral outer end counter motion, its movement velocity is greater than the speed of undergauge pipe elongation;
The backhaul of step 4) hydraulic press:
The left and right slide block of three-dimensional hydraulic press drives left and right undergauge die (9,9
/) backhaul, the mandrel drive system drives left and right mandrel (5,5
/) backhaul, three-dimensional hydraulic press top shoe drives goes up fixed die (12) backhaul;
The step 5) pickup:
Left and right push rod (22,22 in the three-dimensional hydraulic press sliding block
/) eject pipe (13), pickup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191757.9A CN103212598B (en) | 2013-05-22 | 2013-05-22 | Tube blank bilateral reverse central spindle thrusting reducing die and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191757.9A CN103212598B (en) | 2013-05-22 | 2013-05-22 | Tube blank bilateral reverse central spindle thrusting reducing die and process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103212598A true CN103212598A (en) | 2013-07-24 |
| CN103212598B CN103212598B (en) | 2015-05-13 |
Family
ID=48810940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310191757.9A Active CN103212598B (en) | 2013-05-22 | 2013-05-22 | Tube blank bilateral reverse central spindle thrusting reducing die and process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103212598B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436535A (en) * | 2015-12-08 | 2016-03-30 | 山西汾西重工有限责任公司 | Machining tool of outer surface of small-caliber thin-wall long cylinder |
| CN106556679A (en) * | 2016-11-22 | 2017-04-05 | 燕山大学 | A kind of tubing reducing formation assay device and pipe end are fixed and discharge method |
| CN111558665A (en) * | 2020-05-13 | 2020-08-21 | 燕山大学 | Axle housing shaft head forming process and die for hydraulic bulging drive axle |
| CN112460100A (en) * | 2020-11-26 | 2021-03-09 | 燕山大学 | Push-pull hydraulic cylinder, hydraulic system and working method of hydraulic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1943901A (en) * | 2006-10-13 | 2007-04-11 | 燕山大学 | Rotary shell part hydraulic expansion integrating device |
| CN101161364A (en) * | 2007-11-27 | 2008-04-16 | 重庆工学院 | Positioning device of long pipe perforating die with heterogeneous distribution hole |
| CN102825140A (en) * | 2012-09-19 | 2012-12-19 | 燕山大学 | Reducing die for swelling pressure modeled type automobile axle case |
-
2013
- 2013-05-22 CN CN201310191757.9A patent/CN103212598B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1943901A (en) * | 2006-10-13 | 2007-04-11 | 燕山大学 | Rotary shell part hydraulic expansion integrating device |
| CN101161364A (en) * | 2007-11-27 | 2008-04-16 | 重庆工学院 | Positioning device of long pipe perforating die with heterogeneous distribution hole |
| CN102825140A (en) * | 2012-09-19 | 2012-12-19 | 燕山大学 | Reducing die for swelling pressure modeled type automobile axle case |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436535A (en) * | 2015-12-08 | 2016-03-30 | 山西汾西重工有限责任公司 | Machining tool of outer surface of small-caliber thin-wall long cylinder |
| CN106556679A (en) * | 2016-11-22 | 2017-04-05 | 燕山大学 | A kind of tubing reducing formation assay device and pipe end are fixed and discharge method |
| CN106556679B (en) * | 2016-11-22 | 2018-12-14 | 燕山大学 | A kind of tubing reducing formation experimental rig and pipe end is fixed and discharge method |
| CN111558665A (en) * | 2020-05-13 | 2020-08-21 | 燕山大学 | Axle housing shaft head forming process and die for hydraulic bulging drive axle |
| CN112460100A (en) * | 2020-11-26 | 2021-03-09 | 燕山大学 | Push-pull hydraulic cylinder, hydraulic system and working method of hydraulic system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103212598B (en) | 2015-05-13 |
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| C14 | Grant of patent or utility model | ||
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Effective date of registration: 20190924 Address after: 066000 No. 16 Heilongjiang West Road, Qinhuangdao Economic and Technological Development Zone, Hebei Province Patentee after: Qinhuangdao Tongqiao Technology Co.,Ltd. Address before: Hebei Street West Harbor area, 066004 Hebei city of Qinhuangdao province No. 438 Patentee before: Yanshan University |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Die and process of double side reverse mandrel push compression diameter of tube blank Effective date of registration: 20220628 Granted publication date: 20150513 Pledgee: Changjiang Technology sub branch of Qinhuangdao Bank Co.,Ltd. Pledgor: Qinhuangdao Tongqiao Technology Co.,Ltd. Registration number: Y2022980009146 |
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