EP0778110A3 - Method for modifying the operation mode of a fluid driven percussion mechanism and percussion mechanism for carrying out the method - Google Patents

Method for modifying the operation mode of a fluid driven percussion mechanism and percussion mechanism for carrying out the method Download PDF

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Publication number
EP0778110A3
EP0778110A3 EP96119281A EP96119281A EP0778110A3 EP 0778110 A3 EP0778110 A3 EP 0778110A3 EP 96119281 A EP96119281 A EP 96119281A EP 96119281 A EP96119281 A EP 96119281A EP 0778110 A3 EP0778110 A3 EP 0778110A3
Authority
EP
European Patent Office
Prior art keywords
stroke
percussion mechanism
time delay
return stroke
percussion piston
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Withdrawn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
EP96119281A
Other languages
German (de)
French (fr)
Other versions
EP0778110A2 (en
Inventor
Heinz-Jürgen Dr.-Ing. Prokop
Karlheinz Fritz
Marcus Dr.-Ing. Geimer
Martin Schareina
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.)
Construction Tools GmbH
Original Assignee
Krupp Bautechnik GmbH
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 Krupp Bautechnik GmbH filed Critical Krupp Bautechnik GmbH
Publication of EP0778110A2 publication Critical patent/EP0778110A2/en
Publication of EP0778110A3 publication Critical patent/EP0778110A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

Die Erfindung befaßt sich mit der Beeinflussung des Betriebsverhaltens eines fluidbetriebenen Schlagwerks (1) mit einem Schlagkolben (3), der unter Einwirkung einer Steuerung (5) wechselweise einen Arbeitshub und einen Rückhub ausführt. Während des Arbeitshubs wird wegabhängig vom Schlagkolben (3) zu einem Anfangszeitpunkt (T1) ein Auslösesignal erzeugt, welches die Umschaltung der Steuerung in die Rückhubstellung einleitet; diese wird mit einer für alle Schlagzyklen nahezu konstanten Zeitverzögerung Δt1 zu einem nach Vollendung des Arbeitshubs liegenden Zeitpunkt erreicht.The invention is concerned with influencing the operating behavior of a fluid-powered percussion mechanism (1) with a percussion piston (3), the under the action of a controller (5) alternately a working stroke and executes a return stroke. During the work stroke it becomes path-dependent a trigger signal from the percussion piston (3) at an initial time (T1) generated, which switches the control in the return stroke position initiates; this becomes almost constant for all stroke cycles Time delay Δt1 to after completion of the working stroke lying point reached.

Mit der Erfindung wird der Vorschlag unterbreitet, eine zweite Zeitverzögerung Δt2 in Lauf zu setzen mit der Folge, daß der Schlagkolben (3) während der Zeitverzögerung Δt1 zunächst einen vom Reflexionsgrad des zu bearbeitenden Materials abhängigen Rückhub und - nach Umschalten der Steuerung in die Rückhubstellung - einen Rest-Rückhub ausführt, wobei zum Endzeitpunkt der zweiten Zeitverzögerung Δt2 unabhängig von der Schlagkolbenstellung die Umschaltung der Steuerung (5) in die Arbeitshubstellung eingeleitet wird.

Figure 00000001
Figure 00000002
The invention proposes to start a second time delay Δt2, with the result that during the time delay Δt1 the percussion piston (3) first has a return stroke dependent on the reflectance of the material to be processed and - after switching the control to the return stroke position - executes a residual return stroke, the switchover of the control (5) to the working stroke position being initiated at the end of the second time delay .DELTA.t2, regardless of the percussion piston position.
Figure 00000001
Figure 00000002
EP96119281A 1995-12-07 1996-12-02 Method for modifying the operation mode of a fluid driven percussion mechanism and percussion mechanism for carrying out the method Withdrawn EP0778110A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995145708 DE19545708A1 (en) 1995-12-07 1995-12-07 Method for influencing the operating behavior of a fluid-operated hammer mechanism and hammer mechanism suitable for carrying out the method
DE19545708 1995-12-07

Publications (2)

Publication Number Publication Date
EP0778110A2 EP0778110A2 (en) 1997-06-11
EP0778110A3 true EP0778110A3 (en) 1998-06-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96119281A Withdrawn EP0778110A3 (en) 1995-12-07 1996-12-02 Method for modifying the operation mode of a fluid driven percussion mechanism and percussion mechanism for carrying out the method

Country Status (3)

Country Link
EP (1) EP0778110A3 (en)
JP (1) JPH09174461A (en)
DE (1) DE19545708A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19923680B4 (en) * 1999-05-22 2004-02-26 Atlas Copco Construction Tools Gmbh Method for determining the operating time and the operating state of a hydraulic impact unit, in particular hydraulic hammer, and device for carrying out the method
JP4463381B2 (en) * 2000-06-01 2010-05-19 古河機械金属株式会社 Damper pressure control device for hydraulic drill
SE520460C2 (en) 2001-05-10 2003-07-15 Morphic Technologies Ab Apparatus and method of material processing using high kinetic energy
KR100569198B1 (en) * 2003-05-06 2006-04-07 이일재 Hydraulic percussion device
JP4488694B2 (en) * 2003-06-25 2010-06-23 甲南電機株式会社 Hydraulic striking device
FI117548B (en) * 2005-03-24 2006-11-30 Sandvik Tamrock Oy The impactor,
FR2983760B1 (en) * 2011-12-09 2014-08-15 Montabert Roger METHOD FOR SWITCHING THE STROKE STROKE OF A STRIPPER PISTON OF A PERCUSSION APPARATUS
US9840000B2 (en) 2014-12-17 2017-12-12 Caterpillar Inc. Hydraulic hammer having variable stroke control

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2248912A1 (en) * 1973-10-29 1975-05-23 Dresser Ind
DE3443542A1 (en) * 1984-11-29 1986-06-05 Fried. Krupp Gmbh, 4300 Essen HYDRAULIC BEATER
EP0461565A1 (en) * 1990-06-14 1991-12-18 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Method and device for the determination of characteristic features of an impact motor
EP0486898A1 (en) * 1990-11-20 1992-05-27 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Method and device for adjustment of working caracteristics of an impact mechanism to the hardness of the material to be destroyed
DE19507348A1 (en) * 1995-03-02 1996-09-05 Krupp Maschinentechnik Method of controlling work-rate of hydraulic crushing hammer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3115361A1 (en) * 1981-04-16 1982-10-28 Hydroc Gesteinsbohrtechnik GmbH, 5960 Olpe Hydraulic percussion device
SE8106907L (en) * 1981-11-20 1983-05-21 Atlas Copco Ab WAY TO CONTROL A PERFORMANCE AND PERFORMANCE
DE4019016A1 (en) * 1990-06-14 1991-06-13 Krupp Maschinentechnik Hydraulically operated percussion tool - has system to vary mode of operation according to hardness of material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2248912A1 (en) * 1973-10-29 1975-05-23 Dresser Ind
DE3443542A1 (en) * 1984-11-29 1986-06-05 Fried. Krupp Gmbh, 4300 Essen HYDRAULIC BEATER
EP0461565A1 (en) * 1990-06-14 1991-12-18 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Method and device for the determination of characteristic features of an impact motor
EP0486898A1 (en) * 1990-11-20 1992-05-27 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Method and device for adjustment of working caracteristics of an impact mechanism to the hardness of the material to be destroyed
DE19507348A1 (en) * 1995-03-02 1996-09-05 Krupp Maschinentechnik Method of controlling work-rate of hydraulic crushing hammer

Also Published As

Publication number Publication date
DE19545708A1 (en) 1997-06-12
JPH09174461A (en) 1997-07-08
EP0778110A2 (en) 1997-06-11

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