EP0586337A2 - Chisel tool - Google Patents

Chisel tool Download PDF

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Publication number
EP0586337A2
EP0586337A2 EP93810581A EP93810581A EP0586337A2 EP 0586337 A2 EP0586337 A2 EP 0586337A2 EP 93810581 A EP93810581 A EP 93810581A EP 93810581 A EP93810581 A EP 93810581A EP 0586337 A2 EP0586337 A2 EP 0586337A2
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EP
European Patent Office
Prior art keywords
receiving part
cutting part
chisel tool
cutting
diameter
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.)
Granted
Application number
EP93810581A
Other languages
German (de)
French (fr)
Other versions
EP0586337B1 (en
EP0586337A3 (en
Inventor
Rainer Batliner
Kurt Kindle
Karl-Heinz Oehri
Axel Neukirchen
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0586337A2 publication Critical patent/EP0586337A2/en
Publication of EP0586337A3 publication Critical patent/EP0586337A3/en
Application granted granted Critical
Publication of EP0586337B1 publication Critical patent/EP0586337B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits

Definitions

  • the invention relates to a chisel tool with a receiving part and a cutting part.
  • a drilling tool is known from DE-PS 7 47 944, in which the cutting edge consists of a higher quality material.
  • the cutting edge is welded to the rest of the tool. This production method enables the drilling tool to be manufactured more economically.
  • the invention is based on the object of exclusively or predominantly exposed to tools, i.e. in particular to create chisel tools which are economical to manufacture and which, in addition to a long service life, ensure high degradation performance.
  • the chisel tool By producing the chisel tool from parts of different materials, it is possible to use a material of higher quality than the receiving part for the wear-prone cutting part. The less expensive material for the receiving part leads to a more economical chisel tool overall.
  • stepped chisel tools offer advantages in this regard.
  • the transition point from the cutting part to the receiving part in the form of a friction weld connection it makes sense to use this connection point for the jump in diameter.
  • Connecting the two parts to one another via a friction welding connection also offers the advantage that an extraordinarily economical connection method is used, which does not require any additional material.
  • a friction weld connection offers advantages in terms of concentricity and centering.
  • a chisel tool produced in the manner according to the invention also has logistical advantages in that special solutions can be produced without any problems, which can be, for example, special lengths or special materials for specific substrates.
  • a cutting part tailored to the special case can be connected to a standard receiving part.
  • the connection of the two parts by means of a friction welding connection enables refitting with a new cutting part if the receiving part is still operational.
  • the diameter of the receiving part corresponds to 1.1 to 1.3 times the cutting part. It should be noted here that both the receiving part and the cutting part each have a constant diameter along their respective entire lengths.
  • the diameter of the receiving part is preferably 1.125 times the cutting part.
  • the material for the receiving part has proven itself in the special steel 42CrMo4. On the one hand, this steel is able to withstand the stresses acting on the receiving part and, on the other hand, it is so inexpensive that the profitability of the entire chisel tool is promoted.
  • Steel X50CrMoV51 is particularly suitable for the cutting part, which is characterized by a sufficiently high wear resistance in connection with the material degradation taking place.
  • the length ratios of the cutting part and the receiving part can be varied.
  • certain length ratios are advantageous, and these are expediently achieved when the length of the cutting part corresponds to 0.4 to 1 times the receiving part.
  • the chisel tool consists of a receiving part 1 and a cutting part 2.
  • the receiving part 1 has a larger diameter than the cutting part 2.
  • Receiving part 1 and cutting part 2 are connected to one another via a friction welding connection 3.
  • the receiving part 1 has means for connection to a receptacle of a drive device, these means being designed in the present case in a known manner as a locking groove 4.
  • the cutting part 2 is provided with a cutting edge 5 at the free end.
  • the cutting edge 5 can be pointed, spade, profile or the like.
  • both the receiving part 1 and the cutting part 2 each have a constant diameter over their length.
  • the receiving part 1 and the cutting part 2 are each made of different materials, the cutting part 2 being made according to the invention from a material that is even more valuable than the receiving part 1.

Abstract

The chisel tool consists of a receiving part (1) and a cutting part (2), which are interconnected via a friction weld joint (3). The cutting part (2) consists of a higher-quality material than the receiving part (1). Consequently, only one part of the entire chisel tool consists of an expensive, high-quality material, thus leading in particular to benefits in terms of cost-effectiveness.

Description

Die Erfindung betrifft ein Meisselwerkzeug mit einem Aufnahmeteil und einem Schneidenteil.The invention relates to a chisel tool with a receiving part and a cutting part.

Bekanntlich unterliegt bei einem der Bearbeitung von Gestein, Beton und dgl. Materialien dienendes Meisselwerkzeug einer erheblichen Beanspruchung, die zu einem Verschleiss, insbesondere des Schneidenteiles führt. Aus diesem Grunde sind Meisselwerkzeuge aus einem hochwertigen und daher auch teuren Werkstoff hergestellt.As is known, in the case of a chisel tool used for processing stone, concrete and the like, materials is subject to considerable stress, which leads to wear, in particular of the cutting part. For this reason, chisel tools are made from a high-quality and therefore expensive material.

Unter Berücksichtigung des Umstandes, dass das Schneidenteil gegenüber dem Aufnahmeteil einem höheren Verschleiss unterliegt, ist aus der DE-PS 7 47 944 ein Bohrwerkzeug bekannt, bei welchem die Bohrerschneide aus einem höherwertigen Werkstoff besteht. Dabei ist die Bohrerschneide mit dem übrigen Teil des Werkzeuges verschweisst. Aufgrund dieser Fertigungsweise wird eine wirtschaftlichere Herstellung des Bohrwerkzeuges ermöglicht.Taking into account the fact that the cutting part is subject to greater wear than the receiving part, a drilling tool is known from DE-PS 7 47 944, in which the cutting edge consists of a higher quality material. The cutting edge is welded to the rest of the tool. This production method enables the drilling tool to be manufactured more economically.

Während diese bekannte, zu wirtschaftlichen Vorteilen führende Herstellungsart bei Bohrwerkzeugen, die einer Drehbewegung ausgesetzt sind, ihre Berechtigung hat, scheitert eine Übertragung auf Werkzeuge, die ausschliesslich oder überwiegend einer Schlagbeanspruchung ausgesetzt sind. Sofern die Stossbeanspruchung bei der Dimensionierung solcher, ausschliesslich oder überwiegend einer Schlagbeanspruchung ausgesetzten Werkzeuge nicht berücksichtigt wird, entstehen Beanspruchungen, welche zu einem Lösen der Schweissverbindung führen können.While this known, economically advantageous production method for drilling tools which are exposed to a rotary movement is justified, a transmission to tools which are exposed exclusively or predominantly to an impact stress fails. If the impact stress is not taken into account when dimensioning such tools that are exposed exclusively or predominantly to impact stress, stresses arise which can lead to the weld connection being released.

Der Erfindung liegt die Aufgabe zugrunde, ausschliesslich oder überwiegend einer Schlagbeanspruchung ausgesetzte Werkzeuge, d.h. insbesondere Meisselwerkzeuge zu schaffen, welche wirtschaftlich herstellbar sind und nebst einer langen Standzeit eine hohe Abbauleistung gewährleisten.The invention is based on the object of exclusively or predominantly exposed to tools, i.e. in particular to create chisel tools which are economical to manufacture and which, in addition to a long service life, ensure high degradation performance.

Erfindungsgemäss wird die Aufgabe mit einem Meisselwerkzeug gelöst, das in Kombination folgende Merkmale aufweist:

  • a) Das Schneidenteil ist über eine Reibschweissverbindung mit dem Aufnahmeteil verbunden.
  • b) Das Aufnahmeteil und das Schneidenteil weisen je einen gleichbleibenden Durchmesser auf.
  • c) Der Durchmesser des Aufnahmeteiles übersteigt den Durchmesser des Schneidenteiles.
  • d) Das Schneidenteil besteht aus einem gegenüber dem Aufnahmeteil hochwertigeren Werkstoff.
According to the invention, the object is achieved with a chisel tool which has the following features in combination:
  • a) The cutting part is connected to the receiving part via a friction welding connection.
  • b) The receiving part and the cutting part each have a constant diameter.
  • c) The diameter of the receiving part exceeds the diameter of the cutting part.
  • d) The cutting part consists of a higher quality material than the receiving part.

Durch die Herstellung des Meisselwerkzeuges aus Teilen unterschiedlicher Werkstoffe ist es möglich, für das verschleissbehaftete Schneidenteil einen gegenüber dem Aufnahmeteil hochwertigeren Werkstoff zu verwenden. Der dadurch kostengünstigere Werkstoff für das Aufnahmeteil führt zu einem wirtschaftlicheren Meisselwerkzeug insgesamt.By producing the chisel tool from parts of different materials, it is possible to use a material of higher quality than the receiving part for the wear-prone cutting part. The less expensive material for the receiving part leads to a more economical chisel tool overall.

Aufgrund der Stosswellentheorie sowie in Verbindung mit der Forderung nach einer hohen Abbauleistung hat sich gezeigt, dass stufig ausgebildete Meisselwerkzeuge diesbezügliche Vorteile bringen. In Verbindung mit der Übergangsstelle vom Schneidenteil zum Aufnahmeteil in Form einer Reibschweissverbindung bietet sich damit an, für den Durchmessersprung diese Verbindungsstelle auszunutzen. Die beiden Teile über eine Reibschweissverbindung miteinander zu verbinden, bietet zudem den Vorteil, dass ein ausserordentlich wirtschaftliches Verbindungsverfahren angewendet wird, welches ohne zusätzlichen Materialaufwand auskommt. Zudem bietet eine Reibschweissverbindung aufgrund ihrer Herstellung Vorteile hinsichtlich Rundlaufgenauigkeit und Zentrierung.Based on the shock wave theory and in connection with the demand for a high mining performance, it has been shown that stepped chisel tools offer advantages in this regard. In connection with the transition point from the cutting part to the receiving part in the form of a friction weld connection, it makes sense to use this connection point for the jump in diameter. Connecting the two parts to one another via a friction welding connection also offers the advantage that an extraordinarily economical connection method is used, which does not require any additional material. In addition, due to its manufacture, a friction weld connection offers advantages in terms of concentricity and centering.

Ein in der erfindungsgemässen Weise hergestelltes Meisselwerkzeug hat auch logistische Vorteile, indem Speziallösungen ohne weiteres hergestellt werden können, wobei es sich hier beispielsweise um Sonderlängen oder Sondermaterialien für bestimmte Untergründe handeln kann. In einem solchen Falle kann ein auf den Sonderfall abgestimmtes Schneidenteil mit einem Standardaufnahmeteil verbunden werden. Darüber hinaus ermöglicht die Verbindung der beiden Teile über eine Reibschweissverbindung ein Nachbestücken mit einem neuen Schneidenteil, falls das Aufnahmeteil noch einsatzfähig ist.A chisel tool produced in the manner according to the invention also has logistical advantages in that special solutions can be produced without any problems, which can be, for example, special lengths or special materials for specific substrates. In such a case, a cutting part tailored to the special case can be connected to a standard receiving part. In addition, the connection of the two parts by means of a friction welding connection enables refitting with a new cutting part if the receiving part is still operational.

Unter Berücksichtigung der Stosswellentheorie sowie im Hinblick auf die Auswirkungen auf die Abbauleistung ist es zweckmässig, wenn der Durchmesser des Aufnahmeteiles dem 1,1- bis 1,3-fachen des Schneidenteiles entspricht. Dabei ist zu beachten, dass sowohl Aufnahmeteil als auch Schneidenteil für sich jeweils entlang ihrer jeweiligen gesamten Länge einen gleichbleibenden Durchmesser aufweisen. In bevorzugter Weise beträgt dabei der Durchmesser des Aufnahmeteiles das 1,125-fache des Schneidenteiles.Taking into account the shock wave theory and with regard to the effects on the mining performance, it is expedient if the diameter of the receiving part corresponds to 1.1 to 1.3 times the cutting part. It should be noted here that both the receiving part and the cutting part each have a constant diameter along their respective entire lengths. The diameter of the receiving part is preferably 1.125 times the cutting part.

Ais Werkstoff fürdas Aufnahmeteii hatsich im besonderen Stahl 42CrMo4 bewährt. Dieser Stahl ist einerseits den auf das Aufnahmeteil einwirkenden Beanspruchungen gewachsen und ist andererseits derart kostengünstig, dass die Wirtschaftlichkeit des gesamten Meisselwerkzeuges dadurch gefördert wird. Für das Schneidenteil eignet sich im besonderen Stahl X50CrMoV51, welcher sich durch einen ausreichend hohen Verschleisswiderstand im Zusammenhang mit dem stattfindenden Materialabbau auszeichnet.The material for the receiving part has proven itself in the special steel 42CrMo4. On the one hand, this steel is able to withstand the stresses acting on the receiving part and, on the other hand, it is so inexpensive that the profitability of the entire chisel tool is promoted. Steel X50CrMoV51 is particularly suitable for the cutting part, which is characterized by a sufficiently high wear resistance in connection with the material degradation taking place.

Je nach Anwendung können die Längenverhältnisse von Schneidenteil und Aufnahmeteil variiert werden. Im Hinblick auf die Stosswellenbeanspruchung sind jedoch bestimmte Längenverhältnisse von Vorteil, wobei diese zweckmässigerweise dann erreichtwerden, wenn die Länge des Schneidenteiles dem 0,4- bis 1-fachen des Aufnahmeteiles entspricht.Depending on the application, the length ratios of the cutting part and the receiving part can be varied. With regard to the shock wave stress, certain length ratios are advantageous, and these are expediently achieved when the length of the cutting part corresponds to 0.4 to 1 times the receiving part.

Die Erfindung wird nachstehend anhand einer Zeichnung, welche ein Ausführungsbeispiel des erfindungsgemässen Meisselwerkzeuges wiedergibt, näher erläutert.The invention is explained in more detail below with the aid of a drawing which shows an exemplary embodiment of the chisel tool according to the invention.

Wie die Zeichnung zeigt, besteht das Meisselwerkzeug aus einem Aufnahmeteil 1 und einem Schneidenteil 2. Das Aufnahmeteil 1 weist gegenüber dem Schneidenteil 2 einen grösseren Durchmesser auf. Über eine Reibschweissverbindung 3 sind Aufnahmeteil 1 und Schneidenteil 2 miteinander verbunden.As the drawing shows, the chisel tool consists of a receiving part 1 and a cutting part 2. The receiving part 1 has a larger diameter than the cutting part 2. Receiving part 1 and cutting part 2 are connected to one another via a friction welding connection 3.

Im Bereich seines freien Endes weist das Aufnahmeteil 1 Mittel zur Verbindung mit einer Aufnahme eines Antriebsgerätes auf, wobei diese Mittel im vorliegenden Falle in bekannter Weise als Verriegelungsnut 4 ausgebildet sind.In the area of its free end, the receiving part 1 has means for connection to a receptacle of a drive device, these means being designed in the present case in a known manner as a locking groove 4.

Das Schneidenteil 2 ist am freien Ende mit einer Schneide 5 versehen. Je nach Anwendungsfall kann die Schneide 5 spitzförmig, spatenförmig, profilförmig oder dgl. ausgebildet sein.The cutting part 2 is provided with a cutting edge 5 at the free end. Depending on the application, the cutting edge 5 can be pointed, spade, profile or the like.

Wie die Figurfernerzeigt, weisen sowohl Aufnahmeteil 1 als auch Schneidenteil 2 je einen über deren Länge gleichbleibenden Durchmesser auf. Darüber hinaus sind Aufnahmeteil 1 und Schneidenteil 2 aus jeweils unterschiedlichen Werkstoffen gefertigt, wobei in erfindungsgemässer Weise das Schneidenteil 2 aus einem gegenüber dem Aufnahmeteil 1 nochwertigeren Werkstoff besteht.As the figure also shows, both the receiving part 1 and the cutting part 2 each have a constant diameter over their length. In addition, the receiving part 1 and the cutting part 2 are each made of different materials, the cutting part 2 being made according to the invention from a material that is even more valuable than the receiving part 1.

Claims (6)

1. Meisselwerkzeug miteinemAufnahmeteil (1) und einem Schneidenteil (2), gekennzeichnet durch die Kombination folgender Merkmale: a) Das Schneidenteil (2) ist über eine Reibschweissverbindung (3) mit dem Aufnahmeteil (1) verbunden. b) Das Aufnahmeteil (1) und das Schneidenteil (2) weisen je einen gleichbleibenden Durchmesser auf. c) Der Durchmesser des Aufnahmeteiles (1) übersteigt den Durchmesser des Schneidenteiles (2). d) Das Schneidenteil (2) besteht aus einem gegenüber dem Aufnahmeteil (1) hochwertigeren Werkstoff. Chisel tool with a receiving part (1) and a cutting part (2), characterized by the combination of the following features: a) The cutting part (2) is connected to the receiving part (1) via a friction weld connection (3). b) The receiving part (1) and the cutting part (2) each have a constant diameter. c) The diameter of the receiving part (1) exceeds the diameter of the cutting part (2). d) The cutting part (2) consists of a higher quality material than the receiving part (1). 2. Meisselwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass der Durchmesser des Aufnahmeteiles (1) dem 1,1- bis 1,3-fachen des Schneidenteiles (2) entspricht.2. Chisel tool according to claim 1, characterized in that the diameter of the receiving part (1) corresponds to 1.1 to 1.3 times the cutting part (2). 3. Meisselwerkzeug nach Anspruch 2, dadurch gekennzeichnet, dass der Durchmesser des Aufnahmeteiles (1) dem 1,125-fachen des Schneidenteiles (2) entspricht.3. Chisel tool according to claim 2, characterized in that the diameter of the receiving part (1) corresponds to 1.125 times the cutting part (2). 4. Meisselwerkzeug nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Aufnahmeteil (1) aus Stahl 42CrMo4 besteht.4. Chisel tool according to one of claims 1 to 3, characterized in that the receiving part (1) consists of 42CrMo4 steel. 5. Meisselwerkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Schneidenteil (2) aus Stahl X50CrMoV51 besteht.5. Chisel tool according to one of claims 1 to 4, characterized in that the cutting part (2) consists of steel X50CrMoV51. 6. Meisselwerkzeug nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Länge des Schneidenteiles dem 0,4- bis 1-fachen des Aufnahmeteiles (1) entspricht.6. Chisel tool according to one of claims 1 to 5, characterized in that the length of the cutting part corresponds to 0.4 to 1 times the receiving part (1).
EP93810581A 1992-08-31 1993-08-17 Chisel tool Expired - Lifetime EP0586337B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4228985A DE4228985A1 (en) 1992-08-31 1992-08-31 Chisel tool
DE4228985 1992-08-31

Publications (3)

Publication Number Publication Date
EP0586337A2 true EP0586337A2 (en) 1994-03-09
EP0586337A3 EP0586337A3 (en) 1995-01-11
EP0586337B1 EP0586337B1 (en) 1996-07-17

Family

ID=6466863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810581A Expired - Lifetime EP0586337B1 (en) 1992-08-31 1993-08-17 Chisel tool

Country Status (7)

Country Link
EP (1) EP0586337B1 (en)
JP (1) JPH06170748A (en)
AT (1) ATE140413T1 (en)
DE (2) DE4228985A1 (en)
DK (1) DK0586337T3 (en)
ES (1) ES2089776T3 (en)
HU (1) HU212090B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2310391A (en) * 1996-02-22 1997-08-27 Boart Longyear Ltd A shank adapter
US9085074B2 (en) 2011-03-22 2015-07-21 Black & Decker Inc. Chisels

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19612277A1 (en) * 1996-03-25 1997-10-02 Fischer Artur Werke Gmbh Tool for boring hole and inserting expansion anchor
DE19757271A1 (en) * 1997-12-22 1999-06-24 Hilti Ag Tool
DE10244509A1 (en) * 2002-09-25 2004-04-08 Hilti Ag Pointed chisel
DE102010031313A1 (en) * 2010-07-14 2012-01-19 Hilti Aktiengesellschaft Tool i.e. chisel tool, for hand-held power tool, has shaft with spigot that is inserted into tool receiver, where wear-resistant component and adjacent region of spring steel are joined together in multi-orbital friction weld
USD734792S1 (en) 2013-03-15 2015-07-21 Black & Decker Inc. Drill bit
USD737875S1 (en) 2013-03-15 2015-09-01 Black & Decker Inc. Drill bit
USD752937S1 (en) * 2013-06-18 2016-04-05 Hilti Aktiengesellschaft Chisel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747944C (en) 1938-12-29 1944-10-20 Heller Geb Twist or twist drills with carbide tipping
EP0470045A1 (en) 1990-08-03 1992-02-05 HILTI Aktiengesellschaft Chisel with optimised shaft

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB934309A (en) * 1961-12-02 1963-08-14 Ward & Payne Ltd Improvements in or relating to joiners' chisels and gouges
AT377207B (en) * 1981-05-22 1985-02-25 Schobesberger Ernst Ing METHOD FOR PRODUCING SHAFTS CHISES
JPS603939A (en) * 1983-05-31 1985-01-10 Kinzaburo Usui Production of chisel blade

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE747944C (en) 1938-12-29 1944-10-20 Heller Geb Twist or twist drills with carbide tipping
EP0470045A1 (en) 1990-08-03 1992-02-05 HILTI Aktiengesellschaft Chisel with optimised shaft

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2310391A (en) * 1996-02-22 1997-08-27 Boart Longyear Ltd A shank adapter
US6109620A (en) * 1996-02-22 2000-08-29 Boart Longyear Limited Shank adapter
US9085074B2 (en) 2011-03-22 2015-07-21 Black & Decker Inc. Chisels
US9333635B2 (en) 2011-03-22 2016-05-10 Black & Decker Inc. Chisels

Also Published As

Publication number Publication date
HU212090B (en) 1996-02-28
EP0586337B1 (en) 1996-07-17
HU9302450D0 (en) 1993-11-29
DK0586337T3 (en) 1996-12-02
DE4228985A1 (en) 1994-03-03
ES2089776T3 (en) 1996-10-01
HUT68759A (en) 1995-07-28
ATE140413T1 (en) 1996-08-15
EP0586337A3 (en) 1995-01-11
JPH06170748A (en) 1994-06-21
DE59303245D1 (en) 1996-08-22

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