EP0029223B1 - Hydraulisches Versorgungssystem einer Pulsationspresse - Google Patents

Hydraulisches Versorgungssystem einer Pulsationspresse Download PDF

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Publication number
EP0029223B1
EP0029223B1 EP19800107012 EP80107012A EP0029223B1 EP 0029223 B1 EP0029223 B1 EP 0029223B1 EP 19800107012 EP19800107012 EP 19800107012 EP 80107012 A EP80107012 A EP 80107012A EP 0029223 B1 EP0029223 B1 EP 0029223B1
Authority
EP
European Patent Office
Prior art keywords
piston
control motor
pressure
valve
chamber
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.)
Expired
Application number
EP19800107012
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0029223A2 (de
EP0029223A3 (en
Inventor
Zbigniew Prof.Dr. Ing. Mech Polanski
Ryszard Dipl. Ing. Mech. Moszumanski
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.)
Politechnika Krakowska
Original Assignee
Politechnika Krakowska
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 Politechnika Krakowska filed Critical Politechnika Krakowska
Publication of EP0029223A2 publication Critical patent/EP0029223A2/de
Publication of EP0029223A3 publication Critical patent/EP0029223A3/de
Application granted granted Critical
Publication of EP0029223B1 publication Critical patent/EP0029223B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure

Definitions

  • the invention relates to a hydraulic supply system for at least one piston with a reduced diameter of a hydraulic control motor of a pulsation press, in which a pump connected to an overflow valve, the pressure line of which is controlled by a slide distributor, is provided for each piston drive, a pulsator being arranged Oil flows as a pulsating jet into the same working space of each piston of the hydraulic control motor as the pump, and a pressure collector is additionally switched on for the return of each piston of the control motor into the pressure space.
  • the invention is therefore based on the prior art given by DE-A1-2 345 527.
  • two pumps feed via sliding valves into one and the same pressure line, with a pulsator being connected to this pressure line, which pulsates the pressure (DE-A1-2 345 527).
  • the pressure in the space above the piston changes during operation as a function of the required technological force, and as the force changes, the pressure in the space below the piston changes, and with it the vibration range of the piston.
  • an expedient embodiment is provided such that the vibration range of the piston can be set independently of the change in the force absorbed by it.
  • the invention has for its object to provide a hydraulic supply system of a pulsation press with easier stabilization of the parameters of the vibration force and high reliability and energy yield.
  • the piston of the control motor which has a reduced diameter, additionally has two axially offset pressure chambers of different sizes on one side, that the pump acts in the larger pressure chamber of the control motor, while another pump acts on the smaller pressure chamber of the same piston of the control motor with the interposition of a pulsator designed as a rotary distributor, the two pumps are each secured by a non-return valve and their pressure lines are each connected to a pressure collector and that the slide distributor in one of its working positions directs the oil to a space on the other side of the piston of the control motor, at the same time the second working chamber is connected to the drain by a further slide valve, while the pressure value in the chamber on the other side of the piston above the piston is limited by means of an overflow valve.
  • the oil supply line from one slide distributor to the rotary distributor is expediently connected to the line by a shut-off valve and a throttle valve, which feeds the oil from the other slide distributor into the first working chamber on one side of the piston of the hydraulic control motor.
  • the slide distributor in its position I directs the oil into the working space under the piston of the hydraulic control motor and through the second slide distributor the oil is fed into the rotary distributor in its working position, from where it flows as a pulsating jet into the working space under the piston of the control motor with a smaller diameter and reaches the drain.
  • the first slide distributor directs the oil into the working space above the piston of the control motor, the working space below the piston with the smaller diameter being connected to the drain by means of a slide valve.
  • the pressure value in the space above the piston of the hydraulic control motor is limited by the overflow valve.
  • the oil supply line from the slide distributor to the rotary distributor is connected to the oil supply line from the slide distributor to the space under the piston of the hydraulic control motor by means of a shut-off valve and a throttle valve.
  • the hydraulic supply system according to the invention enables two schemes of the pulsation load to be carried out using the generally accessible elements of the power hydraulics and enables the process parameters to be regulated continuously in a full range from values close to zero to nominal values.
  • the system according to the invention is characterized by reliability, simple operation and high energy yield.
  • the hydraulic supply system of a pulsation press contains an oil tank 1, from which two multi-piston pumps 4 and 5 with variable delivery capacity extract the oil via filters 2 and 3.
  • the pumps 4 and 5 are driven by DC motors 6 and 7 with infinitely variable speed control.
  • the change in the delivery rate of the Pumps 4 and 5 and the speed of the motors 6 and 7 driving these pumps enables the operating speed of the press to be changed continuously in a wide range.
  • the two pumps 4 and 5 are secured by check valves 8 and 9.
  • the pressure values in the branches of the system fed by the pumps 4 and 5 are limited by means of overflow valves 10 and 11 and displayed by means of pressure gauges 12 and 13.
  • the hydraulic control motor 16 is provided with a piston with two working surfaces.
  • slide distributors 17 and 18 are in their working position I, the oil is pumped into the working space V n under the piston of the hydraulic control motor 16.
  • a slide distributor 19 With simultaneous setting of a slide distributor 19 in its working position I, the oil is supplied by the pump 5 to a rotary distributor 20 acting as a pulsator, of which it flows into the working space V w under the part of the piston of the control motor with a smaller diameter and partly into the outflow to the container 1 reached.
  • the impeller of the rotary distributor 20 is driven by a DC motor 21 with continuously variable speed control. If a shut-off valve 22 in a line connecting the feed line of the space V n under the piston of the hydraulic control motor 16 and the feed line of the rotary distributor 20 is closed (FIG. 2), then the two branches of the supply system work, fed by the pumps 4 and 5 , independent of each other and the load scheme is implemented, in which the amplitude of the force pulsation is constant with increasing average force value (amplitude constant curve).
  • the oil is then pumped from the pump 4 into the space Vp above the piston of the hydraulic control motor 16 and the space V n under the piston of the control motor 16 and the space V w under the part of the piston with a smaller diameter become with the drain to the Container 1 connected.
  • the pressure value in the space Vp above the piston of the hydraulic control motor 16 is limited by means of an overflow valve 25 and displayed by a manometer 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Press Drives And Press Lines (AREA)
EP19800107012 1979-11-15 1980-11-13 Hydraulisches Versorgungssystem einer Pulsationspresse Expired EP0029223B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL219672 1979-11-15
PL21967279A PL126538B1 (en) 1979-11-15 1979-11-15 Pulsatory press hydraulic supply system

Publications (3)

Publication Number Publication Date
EP0029223A2 EP0029223A2 (de) 1981-05-27
EP0029223A3 EP0029223A3 (en) 1981-10-28
EP0029223B1 true EP0029223B1 (de) 1983-11-23

Family

ID=19999458

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800107012 Expired EP0029223B1 (de) 1979-11-15 1980-11-13 Hydraulisches Versorgungssystem einer Pulsationspresse

Country Status (8)

Country Link
EP (1) EP0029223B1 (ru)
BG (1) BG41652A3 (ru)
DD (1) DD154345A5 (ru)
DE (1) DE3065716D1 (ru)
HU (1) HU182236B (ru)
PL (1) PL126538B1 (ru)
RO (1) RO81558B (ru)
SU (1) SU1050583A3 (ru)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3205740C2 (de) * 1982-02-18 1986-02-20 Max Refflinghaus Maschinen- u. Werkzeugfabrik GmbH & Co KG, 5657 Haan Drahtbiegemaschine
EP0103727A1 (de) * 1982-09-02 1984-03-28 Inventio Ag Gleichlaufregelungseinrichtung für den elektrohydraulischen Antrieb einer Abkantpresse
DE3419689C2 (de) * 1984-05-25 1986-11-27 Mannesmann Rexroth GmbH, 8770 Lohr Vorrichtung zur Druckmittelversorgung eines Hydrozylinders
CN103286251A (zh) * 2013-05-17 2013-09-11 天津市天锻压力机有限公司 锻造液压机的供油系统
CN104353770B (zh) * 2014-10-23 2016-03-23 湖南明诚机械制造有限公司 液压锤桩机高频锤桩液压系统及其打锤插装阀
CN106996071B (zh) * 2017-03-20 2019-06-11 温州大学 一种水泥路面碎石化设备的气液混合式激振系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2335412A1 (de) * 1973-07-12 1975-02-06 Exnii Kusnetschno Pressowowo M Hydraulische presse mit pulsierender beaufschlagung
DE2345527A1 (de) * 1973-09-10 1975-03-20 Schirmer & Plate Horizontale schnellschmiedepresse

Also Published As

Publication number Publication date
DE3065716D1 (en) 1983-12-29
BG41652A3 (en) 1987-07-15
PL219672A1 (ru) 1981-06-19
RO81558A (ro) 1983-04-29
DD154345A5 (de) 1982-03-17
SU1050583A3 (ru) 1983-10-23
HU182236B (en) 1983-12-28
PL126538B1 (en) 1983-08-31
RO81558B (ro) 1983-04-30
EP0029223A2 (de) 1981-05-27
EP0029223A3 (en) 1981-10-28

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