EP1197665A2 - Vérin actionneur pour machines de poinçonnage et d'impression, presses, et similaires - Google Patents

Vérin actionneur pour machines de poinçonnage et d'impression, presses, et similaires Download PDF

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Publication number
EP1197665A2
EP1197665A2 EP01120365A EP01120365A EP1197665A2 EP 1197665 A2 EP1197665 A2 EP 1197665A2 EP 01120365 A EP01120365 A EP 01120365A EP 01120365 A EP01120365 A EP 01120365A EP 1197665 A2 EP1197665 A2 EP 1197665A2
Authority
EP
European Patent Office
Prior art keywords
cylinder
pump
drive
piston
drive cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01120365A
Other languages
German (de)
English (en)
Other versions
EP1197665A3 (fr
Inventor
Reinhold Schulte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Niemann Wolfgang Dipl-Ing
Original Assignee
Niemann Wolfgang Dipl-Ing
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Niemann Wolfgang Dipl-Ing filed Critical Niemann Wolfgang Dipl-Ing
Publication of EP1197665A2 publication Critical patent/EP1197665A2/fr
Publication of EP1197665A3 publication Critical patent/EP1197665A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
    • B30B1/323—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure using low pressure long stroke opening and closing means, and high pressure short stroke cylinder means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/032—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters
    • F15B11/0325—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of fluid-pressure converters the fluid-pressure converter increasing the working force after an approach stroke

Definitions

  • the invention relates to a drive cylinder for punching, embossing machines, Presses and the like with a drive piston, which is initially a longer one Rapid stroke with high speed and low force and then a shorter one Performs working stroke with low speed and high force, as well as one Pump cylinder, the pump piston of which drives a drive fluid in the drive cylinder suppressed.
  • Hydraulic cylinders allow the application of high forces. Problems arise however, if at the same time a relatively large stroke from the rest position to Working position must be covered because of a relatively large pressure source Hydraulic tank, pump, control electronics etc. is required, which allows at the same time to generate high pressure and large amounts of hydraulic fluid to transport here and there. In the aforementioned known solutions Therefore, in a rapid stroke, a relatively large amount of fluid with a small amount Pressure is introduced into the drive cylinder and only in the last part of the stroke of the drive piston, in which the higher pressure is required, via a separate Pressure supply system provided a correspondingly high pressure.
  • the invention is therefore based on the object of a drive cylinder of the above To create the way in which switching from rapid stroke to working stroke with technically little effort can be realized without malfunctions may occur.
  • the pump cylinder with the drive cylinder is used to solve this task mechanically fixed or connected by lines so that the pump piston to Execution of the rapid stroke driven by pneumatic pressure quickly with large cross-sectional area a large amount of hydraulic fluid from a hydraulic chamber of the pump cylinder pumps into the drive cylinder, and that in the Air chamber behind the pump piston a sliding additional piston for Driving a plunger is arranged with a small cross-sectional area in a part of the line connection between the hydraulic chamber of the The pump cylinder and the cylinder bore forming the drive cylinder can be inserted is.
  • the invention builds on the well-known concept of the double pump but here shows a particularly simple and easy to implement solution, with which some essential problems of the prior art are eliminated can. It has proven particularly advantageous that the drive piston or piston is driven hydraulically from one Hydraulic system that is between the drive cylinder and the hydraulic chamber the pump cylinder can be moved back and forth without this during the Eilhubes cavitations can occur. On the other hand, it also takes place on the drive side the pump piston does not mix the drive fluids oil and Air instead. Rather, both pistons of the pump cylinder are driven pneumatically.
  • the two pistons of the pump cylinder are in one and the same pneumatic chamber in which they are moved one after the other can without requiring separate pneumatic chambers.
  • the cylinder bore of the plunger contributes to the structural simplicity Part of a connecting line between the hydraulic chamber of the pump piston and the drive cylinder and the hydraulic fluid during the Rapid stroke from the hydraulic chamber of the pump cylinder.
  • the plunger is preferably arranged coaxially in the pump piston and in this longitudinally displaceable, and the cylinder bore is on the hydraulic side Cylinder base of the pump cylinder arranged.
  • the cylinder bore is preferably from its bottom area via further lines to the drive cylinder connected.
  • the plunger is preferably through when it enters the cylinder bore sealed a groove seal embedded in the wall of the cylinder bore, the acts as a one-way seal, i.e. only against hydraulic fluid leakage from the cylinder bore seals in the hydraulic chamber, at an opposite Pressure difference, however, gives way.
  • This has the advantage of being an additional one Protection against cavitation in the cylinder bore or forms the line system to the drive cylinder.
  • the drive cylinder is designated 10 and the pump cylinder 12.
  • a drive piston 14 is arranged displaceably in the drive cylinder 10, which is connected to a piston rod 16, which is connected by a cylinder cover 18th emerges upward from the drive cylinder 10.
  • the piston rod 16 is in not shown connected to a press or embossing tool to whose drive is at stake here.
  • Such a cylinder can also be used as a working cylinder be designated.
  • the pump cylinder 12 is directly connected to a lower cylinder cover 20 Drive cylinder 10 connected.
  • the cylinder cover 20 of the drive cylinder 10 there is a coaxial bore 22 which extends into a channel 24 in the wall 26 of the pump cylinder 12 transferred.
  • the channel 24 is with another channel 28 connected in the bottom 30 of the pump cylinder.
  • a central recess of the bottom 30 is a cylindrical entering the interior of the pump cylinder 12 Insert 32 used, one attached to the outside of the bottom 30 Flange 34 and a cylinder section entering the interior of the pump cylinder 12 36 includes.
  • the cylinder portion 36 has one from its end forth entering cylinder bore 38.
  • This cylinder bore 38 is in the Embodiment shown open to the interior of the pump cylinder 12.
  • a radial bore 40 is provided in the bottom area, which creates a connection between the cylinder bore 38 and the channel system 28,24,22, which in initiates the interior of the drive cylinder 10.
  • the pump cylinder 12 has the wall 26 on the left side in FIG. 1, in which is channel 24. This wall 26 is relatively thick. On the right Page in the drawing is the pump cylinder only by a relatively thin Wall 42 limited. As a result, the one on the left side of the drawing formed hydraulic chamber 44 has a smaller diameter than the pneumatic chamber 46 on the right side. This results in a Pressure increase of the pneumatic pressure in the pneumatic chamber for hydraulic pressure in the hydraulic chamber.
  • the ratio of the diameter is z. B. about 3: 2.
  • the pneumatic chamber 46 is located behind the pump piston 48, so on the right in the drawing, an additional piston 54, the piston rod is designed as a plunger 56.
  • the plunger 56 extends coaxially and slidably through the pump piston 48 in which it is under Insertion of seals is performed.
  • This plunger 56 enters the cylinder bore in the advanced position (FIG. 2) 38 on, but is in the retracted position (Fig. 1) this pulled out.
  • the diameter of the plunger is z. B. about 1/6 of the diameter of the additional piston.
  • groove seal Is near the end of the cylinder bore 38 open to the pump cylinder a circumferential seal in the form of a Groove seal 39 arranged.
  • the term groove seal is meant here for a seal stand, which among other things has the effect, only or above all in one direction to act.
  • the groove seal seals 39 against leakage of hydraulic fluid from the cylinder bore 38 in the direction of the pump cylinder 12 as they pass hydraulic fluid entering leaves. This mode of operation has the advantage that it is quick even with one Withdrawal of the plunger 56 from the cylinder bore 38 does not lead to cavitation can come in the hydraulic system.
  • an inlet opening 66 radially enters a cylinder cover 68 a, the pump cylinder 12 on the opposite of the bottom 30 Side, i.e. on the right in the drawing, closes.
  • the entry opening is 66 connected to a short channel 70, which is in the space between the additional piston 54 and the cylinder cover 68 opens.
  • Fig. 1. 1 is located the drive piston 14 in the retracted, lower position.
  • the associated Piston rod 16 is retracted.
  • the drive piston 14 should initially cover a relatively large distance quickly, without the full Power of the drive is required. So there is compressed air in the inlet opening 60 of the pump cylinder initiated. The compressed air passes through the air duct 58, the tube 64 and the bore 62 in the space between the Pump piston 48 and the additional piston 54 and moves the pump piston 48 to the left in Fig. 1, while the additional piston 54 stops.
  • An air inlet is located in the upper cylinder cover 18 of the drive cylinder 10 74, via a channel 76 with the space inside the drive cylinder 10 is connected, which is located above the drive piston 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP01120365A 2000-10-14 2001-08-25 Vérin actionneur pour machines de poinçonnage et d'impression, presses, et similaires Withdrawn EP1197665A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10051042 2000-10-14
DE2000151042 DE10051042C2 (de) 2000-10-14 2000-10-14 Antriebszylinder für Stanzen, Prägemaschinen, Pressen und dergleichen

Publications (2)

Publication Number Publication Date
EP1197665A2 true EP1197665A2 (fr) 2002-04-17
EP1197665A3 EP1197665A3 (fr) 2004-03-03

Family

ID=7659839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01120365A Withdrawn EP1197665A3 (fr) 2000-10-14 2001-08-25 Vérin actionneur pour machines de poinçonnage et d'impression, presses, et similaires

Country Status (2)

Country Link
EP (1) EP1197665A3 (fr)
DE (1) DE10051042C2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10309030B3 (de) * 2003-03-01 2004-09-16 Niemann, Wolfgang, Dipl.-Ing. Kniehebelpresse

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426530A (en) * 1966-10-26 1969-02-11 Etablis L Faiveley Oleopneumatic jack with staged structure
DE4029138A1 (de) * 1989-09-18 1991-03-28 Savair Inc Oel-/luft-verstaerkerzylinder
US5526644A (en) * 1995-06-07 1996-06-18 Brieschke; Todd M. Oil intensifier cylinder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4427734C2 (de) * 1994-08-05 1996-11-07 Wolfgang Dipl Ing Niemann Antriebszylinder für Pressen, Stanzen, Prägemaschinen oder dergleichen
DE19859891A1 (de) * 1998-12-23 2000-06-29 Tox Pressotechnik Gmbh Hydropneumatischer Druckübersetzer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426530A (en) * 1966-10-26 1969-02-11 Etablis L Faiveley Oleopneumatic jack with staged structure
DE4029138A1 (de) * 1989-09-18 1991-03-28 Savair Inc Oel-/luft-verstaerkerzylinder
US5526644A (en) * 1995-06-07 1996-06-18 Brieschke; Todd M. Oil intensifier cylinder

Also Published As

Publication number Publication date
DE10051042A1 (de) 2002-05-02
DE10051042C2 (de) 2002-11-28
EP1197665A3 (fr) 2004-03-03

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