CN100591435C - Method for adjusting the position of a mandrel of an extrusion press for producing hollow sections - Google Patents
Method for adjusting the position of a mandrel of an extrusion press for producing hollow sections Download PDFInfo
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- CN100591435C CN100591435C CN200580002483A CN200580002483A CN100591435C CN 100591435 C CN100591435 C CN 100591435C CN 200580002483 A CN200580002483 A CN 200580002483A CN 200580002483 A CN200580002483 A CN 200580002483A CN 100591435 C CN100591435 C CN 100591435C
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- hydraulic cylinder
- core rod
- plug
- conveying capacity
- rod hydraulic
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- 238000001125 extrusion Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002828 fuel tank Substances 0.000 claims description 13
- 230000033228 biological regulation Effects 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 5
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 abstract 1
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 8
- 238000004080 punching Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- Extrusion Of Metal (AREA)
Abstract
The invention relates to a method for adjusting the position of a mandrel (10), which is situated in a hydraulic punch consisting of a cylinder and a ram that form a mandrel cylinder (8), in an extrusion press for producing pipes (2), which are extruded from blocks (4) that are loaded into a receiving device (5) situated upstream of the extrusion press (3) and are punched using the mandrel (10). The invention is characterised in that the mandrel cylinder (8) is driven directly by pumps (11), which are set for a pre-calculated throughput that is dependent on the press speed, and that an additional throughput is added to the pre-calculated pump throughput. To adjust the position of the mandrel (10), a control valve (16) that acts on the ring side (12) of the mandrel (8) is connected to a tank (17).
Description
Technical field
The present invention relates to a kind of method, the method is used for regulating the position of the plug that is arranged on the hydro piercing device of the extruder of making pipe, this hole punched device comprises a hydraulic cylinder and a piston, these two forms a core rod hydraulic cylinder, described pipe then by be contained in the container and form by means of the ingot blank extruding that plug is gone out the hole, described container is arranged on before the extrusion die.
Background technology
A kind of metal extrusion press that is used to make hollow profile or pipe is disclosed by Germany Patent document 1227858.On this extruder, plug is arranged in the principal pressure machine piston with its core rod hydraulic cylinder.The piston of core rod hydraulic cylinder is connected with the punching crossbeam of a slide-and-guide in the moved cross beam of forcing press.As the replacement scheme of this built-in hole punched device, as everybody knows, outside the principal pressure machine piston of forcing press or principal pressure machine hydraulic cylinder, be provided with the core rod hydraulic cylinder.
Because plug has different length usually, wherein should take in wearing and tearing, so by means of leading screw and feed screw nut and under driving mechanism when pipe being pushed by so-called fixed plug, the plug point in the die opening is accurately regulated.Leading screw and feed screw nut are arranged in the hydraulic cylinder crossbeam with plug travel limits bar or in the punching crossbeam usually.Leading screw and feed screw nut be arranged on carry out the plug travel limits in the punching crossbeam, this point such as obtain open by the aforementioned patent document.Here, an end of plug travel limits bar is fixed in the hydraulic cylinder crossbeam, and at its other end carrying block towards carriage.The punching crossbeam relies on a nut support on retaining is determined, and therefore the stroke of this nut restriction punching crossbeam also limits the stroke of plug, and can regulate by leading screw.
For when hollow profile or the pipe extrusion molding to by the plug of pressure ram guiding in mould/in die, position, and when extruding, keep this position with very high precision, when the extruder actual motion, in extrusion process, plug is remained on this position by means of the core rod hydraulic cylinder.In order to keep plug this position in mould, hydraulic cylinder must be accurately when moving ahead with pressure ram identical speed plug is taken back.But, in this case owing to deformation force, friction and hydraulic pressure compressibility have produced interference volume, must carry out balance in highly dynamic mode to interference volume by regulating system here.
In addition, be necessary to cover very big 1: 120 and higher velocity interval.At last, should be noted that this pulling force can reverse equally because technology can produce the pulling force of very big continuous variation to plug when extrusion process finishes.In order to guarantee the location, use servo valve here, by whole volumes of servo valve control punching hydraulic cylinder.Because these servo valves can only be worked in limited volume scope, so unavoidably be necessary for the servo valve of 1: 120 a plurality of different rated specifications of velocity resolution plan-parallel structure.
Summary of the invention
Therefore, task of the present invention provides the described method of a kind of beginning, and the method is in simple mode and especially realize meeting the plug position adjustments of all requirements under the situation that does not need servo valve.
Solved by this method by this task of the present invention, be that the core rod hydraulic cylinder is directly driven by the pump that is adjusted to precalculated conveying capacity according to extrusion speed, and supply with extra conveying capacity to precalculated pump duty, wherein for regulating the position of plug, the control valve on the annular side that acts on the core rod hydraulic cylinder is connected on the fuel tank.By direct driving, that is to say the control valve that connects in the middle of not using, like this between pump and core rod hydraulic cylinder without any servo valve, or rather, can only use cartridge type valve common, that expense is cheap and convenient operation to regulate moving direction, concerning the volume flow of pump, just not produce the pressure loss like this.Can reach this point with this, promptly the operating pressure on pump pressure and the core rod hydraulic cylinder is corresponding.In addition, energy loss can occur hardly, and the operating pressure above the pump is littler.Directly driving only needs unique, a very little control valve that still has very high degree of precision and work fast to be used for whole velocity interval.A lot of costs have also been saved thus simultaneously.
According to control principle of the present invention be, according to extrusion speed pump be adjusted to a conveying capacity, this conveying capacity roughly produces the opening speed of an onesize core rod hydraulic cylinder.Therefore plug roughly occupies a constant position in mould in whole extrusion process.Realize the location and proofread and correct interference volume for same, as to the replenishing of the conveying capacity of the core rod hydraulic cylinder that calculated, supply with extra conveying capacity to pump duty here by the present invention.This extra conveying capacity has been got rid of this possibility, and promptly the core rod hydraulic cylinder shifts out die location against the direction of extrusion downwards.Be provided for providing connection, and the needed logical oil mass of living fuel tank in location, position is regulated from the ring surface of hydraulic cylinder to fuel tank at the small-sized control valve that the annular side of core rod hydraulic cylinder is regulated.As long as lead to the numerical value of the oil mass of fuel tank less than extra conveying capacity, plug will shift out mould downwards so; If it is bigger to lead to the oil mass of fuel tank in contrast, plug is further in the shift-in mould so.This control valve that comes the holding position by an adjuster just with this balance interference volume.
According to a kind of proposition preferred embodiment of the present invention, the discharge pressure of core rod hydraulic cylinder is adjusted to the pressure of a regulation.Even when descending or when power is reversed, also can carry out the position adjustments of plug with this pulling force on plug.For this reason, discharge side or a ratio-pressure limiting valve is preferably arranged at hydraulic cylinder in the piston face side of core rod hydraulic cylinder.Like this, even the power on plug also can reach stable adjusting function when counter-rotating or decline occurring.
If preferred regulation, pressure on the both sides of core rod hydraulic cylinder is monitored, such as not only all arranging a manometer in the annular side of core rod hydraulic cylinder and in its discharge side, just can be under the situation of connecting second adjuster and the pressure on two hydraulic cylinder sides being monitored with this, when being lower than the numerical value of regulation, improve discharge pressure, make the pressure that goes out regulation in the backhaul side adjusted of core rod hydraulic cylinder.Therefore this hydraulic system always is in tensioning state, and the adjusting of the orientation independent of realization and power.
But below requiring to reach, further feature of the present invention and details accessory rights in unique accompanying drawing, learn in the explanation with the regulation scheme shown in the mode of simplifying very much about a kind of.
For a kind of as the known extruder 1 that is used to make hollow profile or pipe 2, in the drawings with the mode of simplifying very much only show the mould 3 that comprises a die, be connected the mould front, admitted a container that has been incorporated with ingot blank to be extruded 45, a pressure ram 6 and a core rod hydraulic cylinder 8 that has hydraulic supply unit that has crossbeam 7.Core rod hydraulic cylinder 8 has held one and has come and gone the piston 9 that moves, and this piston has passing pressure ram 6 and having carried out the plug 10 that the location, position is regulated with its tip or front end in mould 3 by its carrying.
Core rod hydraulic cylinder 8 is directly driven by pump 11.For this purpose, on the pump 11 shown in its annular side 12 is connected to by a fluid pressure line 13, for this pump has set an inflow valve 14 along throughput direction.The fuel tank pipeline 15 that comes out from fluid pressure line 13 top sets has an integrated very little control valve (NG10) 16 that links to each other with a unshowned adjuster, and is linked in the fuel tank 17.
For the position of plug 10 is regulated its front end accurately is positioned in the mould 3, with the hydraulic fluid of extra quantity in the conveying capacity of annular side 12 supply pumps 11 of core rod hydraulic cylinder 8 to be used to proofread and correct interference volume, this conveying capacity is calculated acquisition in advance according to extrusion speed.If lead to the numerical value of the oil mass of fuel tank 17 less than extra conveying capacity, by the switching by the caused small-sized control valve 16 of adjuster, plug 10 can shift out mould 3 immediately downwards.In contrast, if lead to the numerical value of the oil mass of fuel tank 17 greater than extra conveying capacity, plug 10 can continue in the shift-in mould 3.Therefore plug 10 is in mould 3 on the position of a constant in whole extrusion process all the time.
The monitoring that is under pressure of two hydraulic cylinder sides 12,18 of core rod hydraulic cylinder 8.For this reason, not only all setting a manometer 19a or 19b on its annular side 12 but also on its discharge side 18.Lead to the discharge line 20 that fuel tank pipeline 15 links to each other therewith below small-sized control valve 16 of fuel tank pipeline 15 a discharge side 18 from core rod hydraulic cylinder 8, connected a ratio-pressure limiting valve or pressure regulator valve 21, this valve then is connected on another unshowned adjuster.
By the pressure on two hydraulic cylinder sides being monitored and pressure regulator valve 21 being switched by means of second adjuster, can when being lower than setting, improve the pressure of discharging on the side 18, make the pressure that annular side 12 or backhaul side adjusted at core rod hydraulic cylinder 8 goes out regulation.Therefore this hydraulic system always is in tensioning state, and the adjusting of the orientation independent of realization and power, can react to decline of the pulling force on the plug 10 or power counter-rotating equally with this.
Claims (3)
1. be used for regulate making the method for position of the plug that is arranged on a hydro piercing device (10) of the extruder of pipe (2), described hole punched device comprises a hydraulic cylinder and a piston, these two has formed a core rod hydraulic cylinder (8), described pipe then by be contained in the container (5) and form by means of ingot blank (4) extruding that plug (10) is gone out the hole, described container is positioned at extrusion die (3) before, the piston rod side (12) of core rod hydraulic cylinder (8) has connected a pump (11) by fluid pressure line (13), and between fluid pressure line (13) and fuel tank (17), be provided with control valve (16)
Described method comprises step:
According to extrusion speed described pump (11) is adjusted to precalculated conveying capacity,
Utilize described pump (11) directly to drive described core rod hydraulic cylinder (8) with described precalculated conveying capacity;
An extra conveying capacity is supplied in the described precalculated conveying capacity; With
It is more greater or lesser than described extra conveying capacity by described control valve (16) conveying capacity of leading to described fuel tank (17) to be remained, thereby described plug (10) is remained on stable position.
2. by the described method of claim 1, it is characterized in that: the discharge pressure of described core rod hydraulic cylinder (8) is adjusted to the pressure of a regulation.
3. by claim 1 or 2 described methods, it is characterized in that: the pressure on the both sides of described core rod hydraulic cylinder (8) is monitored.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004002377 | 2004-01-15 | ||
| DE102004002377.8 | 2004-01-15 | ||
| DE102005001764.9 | 2005-01-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1909989A CN1909989A (en) | 2007-02-07 |
| CN100591435C true CN100591435C (en) | 2010-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580002483A Active CN100591435C (en) | 2004-01-15 | 2005-01-14 | Method for adjusting the position of a mandrel of an extrusion press for producing hollow sections |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100591435C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253129A (en) * | 2017-07-12 | 2019-01-22 | 上海宝钢工业技术服务有限公司 | The test macro and method of radial forging machine main hydraulic cylinder |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6142876B2 (en) * | 2012-09-12 | 2017-06-07 | 宇部興産機械株式会社 | Double acting extrusion press |
| JP6232745B2 (en) * | 2013-05-24 | 2017-11-22 | 宇部興産機械株式会社 | Double acting extrusion press |
| WO2015083536A1 (en) * | 2013-12-04 | 2015-06-11 | 宇部興産機械株式会社 | Direct double-action extrusion press |
-
2005
- 2005-01-14 CN CN200580002483A patent/CN100591435C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253129A (en) * | 2017-07-12 | 2019-01-22 | 上海宝钢工业技术服务有限公司 | The test macro and method of radial forging machine main hydraulic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1909989A (en) | 2007-02-07 |
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