CN103212598B - 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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- CN103212598B CN103212598B CN201310191757.9A CN201310191757A CN103212598B CN 103212598 B CN103212598 B CN 103212598B CN 201310191757 A CN201310191757 A CN 201310191757A CN 103212598 B CN103212598 B CN 103212598B
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- die
- mandrel
- undergauge
- pipe
- tube blank
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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, particularly relate to a kind of tube blank bilateral reverse mandrel push-sinking technique and mould.
Background technology
Push-sinking makes pipe by taper matrix to reduce the manufacturing process of its external diameter, can be divided into free diameter reducing according to there being spindle-less during undergauge and having mandrel undergauge.During free push-sinking, after undergauge, pipe length elongation, wall thickness increase, and pipe diameter is less than the diameter of undergauge die sizing area, and pipe end exists warpage, internal-and external diameter low precision.When having mandrel push-sinking, can reduce pipe wall thickness increment, mandrel can float not feeding, mandrel also can with undergauge die synchro-feed, but undergauge power significantly increases, and easily causes pipe unstability.
For improving the inside/outside diameter size precision of pipe after undergauge, mainly contain two kinds of ways, a kind of method on special hydraulic press, successively carries out centreless undergauge and mandrel squeezes endoporus, and another kind of method adopts floating core shaft type reducing die.Special hydraulic press is primarily of master cylinder, auxiliary oil cylinder, undergauge die, crowded endoporus mandrel composition, main oil cylinder piston drives undergauge die first to carry out centreless undergauge, then main oil cylinder piston pressurize, auxiliary oil cylinder piston driving mandrel have been moved to the whole footpath of pipe fitting endoporus, and master cylinder and auxiliary oil cylinder are successively return afterwards.Adopt this technique, after pipe undergauge, inside/outside diameter size difference can reach higher precision, but machine tool structure is complicated, and operation precision requires high, and manufacture difficulty is large, cost is high.
When adopting floating core shaft type reducing die, common horizontal hydraulic press uses, mould is primarily of oil cylinder piston, die, mandrel, elastic component, clamp, guide pin bushing composition.In oil cylinder piston hole, elastic component is housed, make mandrel give prominence to undergauge die and insert pipe, during undergauge, mandrel can retreat together with pipe in theory, ensure that tube blank size precision.Floating core shaft type reducing die is suitable for the reducing of light-wall pipe, and when pipe diameter shrinkage part is longer, during undergauge, mandrel can not follow pipe retrogressing, causes undergauge power to increase, and pipe elongation reduces; In addition, the axial space of blowing, pickup needs is large.
Summary of the invention
During for solving long-armed pipe free push-sinking, pipe wall thickness increment is large, inside/outside diameter size precision is low, and undergauge power greatly, easily causes the problems such as pipe unstability when having a mandrel push-sinking, the invention provides a kind of tube blank bilateral reverse mandrel push-sinking technique and mould, this invention effectively controls the quality of wall thickness increment and undergauge pipe.
The technical solution adopted for the present invention to solve the technical problems is: a kind of tube blank bilateral reverse mandrel push-sinking mould, comprises cope match-plate pattern, upper fixed die, lower fixed die, counterdie fixed head, lower bolster, left and right undergauge die assembly, left and right guidance set and right mandrels assembly.Fixed mould, lower fixed die are the flanged (FLGD) semicylinders in two ends, are arranged in cope match-plate pattern and counterdie fixed head respectively; Counterdie fixed head passes through screw
, key block is connected on lower bolster, by guide pillar, guide pin bushing guiding between cope match-plate pattern and lower bolster.Left and right undergauge die assembly is arranged between cope match-plate pattern and counterdie fixed head, and left and right guidance set is arranged on the both sides of lower fixed die, and right mandrels assembly is arranged in the guidance set of left and right respectively.
Described left and right undergauge die assembly is made up of left and right undergauge die, left and right die body, left and right die carrying cylinder, left and right sides template respectively, left and right undergauge die elastic conjunction is in 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 by screws in left and right side template.
Described left and right 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 counterdie fixed head front and rear sides wall is arranged, forward and backward guide plate is arranged three spigot surfaces, forward and backward guide runner is arranged in the cell body of side processing before and after left and right undergauge die body, and slides on the spigot surface of forward and backward guide plate.
Described right mandrels assembly is respectively by right mandrels, left and right piston, left and right end cap, left and right piston tube joint, left and right end cap pipe joint, sealing ring
, sealing ring
and sealing ring
composition, left and right mandrel one end is with flange and slided in left and right die carrying cylinder by flange, and flange end is equipped with left and right end cap, and one end of left and right piston is connected in left and right side template, and the other end slides in left and right mandrel.
Use a technique for tube blank bilateral reverse mandrel push-sinking mould, described bilateral reverse mandrel push-sinking technique uses on three-dimensional hydraulic press, and its concrete steps are as follows:
Step 1) clamping pipe:
Pipe both sides being coated with lubricating fluid is placed under stem reducing mould on fixed die, and three-dimensional hydraulic press top shoe drives upper fixed die pressure, and upper fixed die and lower fixed die clamp in the middle part of pipe jointly.
Step 2) insert mandrel:
Before undergauge, a left side (right side) mandrel is pushed pipe inside by mandrel drive system, and the length that left (right side) mandrel inserts pipe should be greater than 1.15 times of necking length, and the internal diameter that the external diameter of left (right side) mandrel requires according to pipe after undergauge is determined.
Step 3) undergauge:
A three-dimensional hydraulic press left side (right side) slide block drive left (right side) undergauge die by pipe outer end to the inside work enter, undergauge; Meanwhile, mandrel drive system drives left (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 slide block drives left and right undergauge die backhaul, mandrel drive system drives right mandrels backhaul, and three-dimensional hydraulic press top shoe drives upper mould fixed plate backhaul.
Step 5) pickup:
Left and right push rod in three-dimensional hydraulic press sliding block ejects pipe, pickup.
The invention has the beneficial effects as follows: after pipe undergauge, wall thickness value added is little, undergauge power amplification is little, pipe unstability can not be caused.; Undergauge die and mandrel alignment high, ensure that pipe inside/outside diameter size precision is high.; Easy to operate, do not need to strengthen hydraulic press axial space.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of pipe after tube blank bilateral reverse mandrel push-sinking mould and technique undergauge;
Fig. 2 is the front view of tube blank bilateral reverse mandrel push-sinking mould stem reducing mould;
Fig. 3 is the profile in tube blank bilateral reverse mandrel push-sinking mode host visual pattern C-C cross section;
Fig. 4 is the profile in tube blank bilateral reverse mandrel push-sinking mode host visual pattern D-D cross section;
Fig. 5 is the top view of tube blank bilateral reverse mandrel push-sinking mould stem reducing mould;
Fig. 6 is mode host visual pattern when mandrel inserts pipe before tube blank bilateral reverse mandrel push-sinking mould process undergauge;
Fig. 7 is the front view of tube blank bilateral reverse mandrel push-sinking technique mandrel backhaul rear mold.
In 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 blocks, 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
Detailed description of the invention
Embodiment
Fig. 1 is the schematic diagram of pipe after the undergauge of the embodiment of the present invention, the seamless cylindrical steel tube selected, outside diameter d
0=180mm, wall thickness t
0=8mm, length is 1395mm.After the undergauge of pipe both sides, outside diameter d
1=162mm, wall thickness t
1=8.3mm, length L
1=1435mm, wherein the necking length of both sides is respectively 420mm.
The tube blank bilateral reverse mandrel push-sinking technique of the embodiment of the present invention, comprises the steps:
1) pipe is clamped:
The pipe 13 both sides being coated with saponification liquor is placed under stem reducing mould on 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 hydraulic press top shoe drives upper fixed die 12 to depress, in the middle part of clamping pipe 13.
2) mandrel is inserted:
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 mandrel length inserted in 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
/) axial work enters to realize undergauge, work speed is v
1for 25mm/s; Meanwhile, left and right piston (6,6
/) follow undergauge die assembly together work enter, left and right piston tube joint (2,2
/) oil return, left and right end cap pipe joint (4,4
/) oiling, oiling flow should meet 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
/) position shown in backhaul to Fig. 7, three-dimensional hydraulic press top shoe drives upper fixed die 12 backhaul.
5) pickup:
Push rod 22,22 in hydraulic press sliding block 26
/eject pipe 13, pickup.
The mould of the tube blank bilateral reverse mandrel push-sinking technique use of the embodiment of the present invention, is made up of cope match-plate pattern 11, upper fixed die 12, lower fixed die 24, counterdie fixed head 25, lower bolster 26 and left and right undergauge die assembly, left and right guidance set and right mandrels assembly etc.Fixed mould 12, lower fixed die 24 are the flanged (FLGD) semicylinders in two ends, are arranged on respectively in cope match-plate pattern 11, counterdie fixed head 25.Counterdie fixed head 25 passes through screw
33, key block 23 is connected on lower bolster 26.Led by guide pillar 27, guide pin bushing 28 between cope match-plate pattern 11 and lower bolster 26.Left and right undergauge die assembly is arranged between cope match-plate pattern 11 and counterdie fixed head 25, and left and right guidance set is arranged on the both sides of lower fixed die 24, and right mandrels assembly is arranged in the guidance set of left and right respectively.
Described left and right undergauge die assembly is respectively by left and right undergauge die (9,9
/), left and right die body (8,8
/), left and right die carrying cylinder (7,7
/), left and right sides template (1,1
/) etc. composition.Left and right undergauge die (9,9
/) elastic conjunction is at left and right die body (8,8
/) in.Left and right die carrying cylinder (7,7
/) one end by the left and right die body (8,8 of screw attachment
/), the other end is fixed by screws in side template left and right (1,1
/) on.
Described left and right guidance set is arranged on the both sides of lower fixed die 24, respectively by front and back guide plate (29,29
/), front and back guide runner (30,30
/) composition.Front and back guide plate (29,29
/) be contained in the T-slot before and after counterdie fixed head 25, two side arranged, front and back guide plate (29,29
/) on three spigot surfaces are set.Forward and backward guide runner (30,30
/) be arranged on left and right undergauge die body (8,8
/) before and after side processing cell body in, and at forward and backward guide plate (29,29
/) spigot surface on slide.
Described right mandrels assembly is respectively by right mandrels (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
/) and sealing ring
16, sealing ring
17 and sealing ring
21 compositions.Right mandrels (5,5
/) one end is with flange and by flange at left and right die carrying cylinder (7,7
/) interior slip, flange end is equipped with left and right end cap (3,3
/).Left and right piston (6,6
/) one end be connected to left and right sides template (1,1
/) on, the other end is at right mandrels (5,5
/) interior slip.
Claims (2)
1. a tube blank bilateral reverse mandrel push-sinking mould, comprise cope match-plate pattern (11), upper fixed die (12), lower fixed die (24), counterdie fixed head (25) and lower bolster (26), and left and right undergauge die assembly, left and right guidance set, right mandrels assembly, fixed mould (12), lower fixed die (24) are the flanged (FLGD) semicylinder in two ends, are arranged in cope match-plate pattern (11) and counterdie fixed head (25) respectively, counterdie fixed head (25) passes through screw
(33), key block (23) is connected on lower bolster (26), led between cope match-plate pattern (11) and lower bolster (26) by guide pillar (27), guide pin bushing (28), left and right undergauge die assembly is arranged between cope match-plate pattern (11) and counterdie fixed head (25), and left and right guidance set is separately positioned on the both sides of lower fixed die (24), and right mandrels assembly is arranged in the guidance set of left and right respectively, described left and right guidance set is arranged on the both sides of lower fixed die (24), respectively by front, back guide (29, 29 '), before, rear guide runner (30, 30 ') form, before, back guide (29, 29 ') counterdie fixed head (25) is contained in front, in the T-slot that rear two side is arranged, before, back guide (29, 29 ') three spigot surfaces are set on, before, rear guide runner (30, 30 ') left side is arranged on, right undergauge die body (8, 8 ') in the cell body of side processing before and after, and front, back guide (29, 29 ') spigot surface slides, it is characterized in that: described right mandrels assembly is respectively by a left side, right mandrel (5, 5 '), left, right piston (6, 6 '), left, right end cap (3, 3 '), left, right piston tube joint (2, 2 '), left, right end cap pipe joint (4, 4 '), left, right sealing ring
(16), left and right sealing ring
and left and right sealing ring (17)
(21) form, left and right mandrel (5,5 ') one end is with flange and slided in left and right die carrying cylinder (7,7 ') by flange, flange end is equipped with left and right end cap (3,3 '), one end of left and right piston (6,6 ') is connected in left and right side template (1,1 '), and the other end slides in left and right mandrel (5,5 ').
2. use a technique for tube blank bilateral as claimed in claim 1 reverse mandrel push-sinking mould, it is characterized in that: described bilateral reverse mandrel push-sinking technique uses on three-dimensional hydraulic press, and its concrete steps are as follows:
Step 1) clamping pipe:
The pipe (13) both sides being coated with lubricating fluid is placed under stem reducing mould on fixed die (24), and three-dimensional hydraulic press top shoe drives upper fixed die (12) pressure, and upper fixed die (12) and lower fixed die (24) clamp the middle part of pipe (13) jointly;
Step 2) insert mandrel:
Before undergauge, mandrel drive system is by 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) necking length;
Step 3) undergauge:
The left and right slide block of three-dimensional hydraulic press drives left and right undergauge die (9,9
/) by pipe (13) outer end to the inside work enter, undergauge; Meanwhile, 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 that undergauge pipe extends;
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, mandrel drive system drives left and right mandrel (5,5
/) backhaul, three-dimensional hydraulic press top shoe drives upper fixed die (12) backhaul;
Step 5) pickup:
Left and right push rod (22,22 in 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 CN103212598A (en) | 2013-07-24 |
| CN103212598B true 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) |
Families Citing this family (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 |
| 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 |
| CN111558665B (en) * | 2020-05-13 | 2021-10-29 | 燕山大学 | Axle housing shaft head forming process and die for hydraulic bulging drive axle |
| CN112460100B (en) * | 2020-11-26 | 2021-10-08 | 燕山大学 | Push-pull hydraulic cylinder, hydraulic system and working method of hydraulic system |
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 |
-
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103212598A (en) | 2013-07-24 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
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 |
|
| TR01 | Transfer of patent right | ||
| 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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