DE102008009570A1 - Break-condition detecting method for machine tool of automatic lathe, involves determining whether path of lubricant or radiations is deflected, and measuring and comparing changed vibrations and/or acoustic waves with threshold values - Google Patents
Break-condition detecting method for machine tool of automatic lathe, involves determining whether path of lubricant or radiations is deflected, and measuring and comparing changed vibrations and/or acoustic waves with threshold values Download PDFInfo
- Publication number
- DE102008009570A1 DE102008009570A1 DE102008009570A DE102008009570A DE102008009570A1 DE 102008009570 A1 DE102008009570 A1 DE 102008009570A1 DE 102008009570 A DE102008009570 A DE 102008009570A DE 102008009570 A DE102008009570 A DE 102008009570A DE 102008009570 A1 DE102008009570 A1 DE 102008009570A1
- Authority
- DE
- Germany
- Prior art keywords
- tool
- vibrations
- workpiece
- compressed air
- jet
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
- B23B49/001—Devices for detecting or indicating failure of drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/006—Arrangements for observing, indicating or measuring on machine tools for indicating the presence of a work or tool in its holder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0904—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool before or after machining
- B23Q17/0909—Detection of broken tools
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
- G01N29/42—Detecting the response signal, e.g. electronic circuits specially adapted therefor by frequency filtering or by tuning to resonant frequency
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
- G01N29/4427—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison with stored values, e.g. threshold values
Abstract
Description
Die Erkennung von Werkzeugbruch basiert oft auf der Überprüfung des Vorhandenseins der Spitze eines Werkzeuges mit einer Laser- oder Infrarotlichtschranke. Sie sind zwar recht verbreitet, aber auch sehr verschmutzungsanfällig. Werkzeuge in Bearbeitungszentren werden, abgesehen von seltenen Fällen der Trockenbearbeitung, mit sehr viel Kühlschmierstoff unter hohem Druck umspült, so dass der Kühlschmierstoff stark in der Maschine herumspritzt. Man versucht zwar die Austrittsöffnung des Lichtstrahls mit Sperrluft sauber zu halten. Das gelingt aber grundsätzlich nur zeitlich begrenzt, da die Sperrluft ölhaltig ist und die Filter zur Säuberung der Sperrluft verschmutzen und dann in ihrer Wirkung nachlassen. Eine andere Ausfallursache liegt im Verkleben der Öffnungen von Sender oder Empfänger durch eingetrocknete Rückstände des Kühlschmierstoffs, insbesondere im Fall der Verwendung von Emulsion. Das betrifft auch die mechanischen Blenden, die oft zusätzlich zur Sperrluftverwendung die Lichtaustritts- bzw. Lichteintrittsöffnungen verschließen und bei Gebrauch öffnen sollen. Sie klemmen gelegentlich durch eingetrocknete Kühlschmierstoffreste, deren Trocknung durch die Sperrluft sogar gefördert wird.The Tool breakage detection is often based on verification the presence of the tip of a tool with a laser or infrared light barrier. They are quite common, but also very dirty. Tools in machining centers except for rare cases of dry processing, lapped with a lot of coolant under high pressure, so that the cooling lubricant splashes around in the machine. you Although tried the exit opening of the light beam with Keep air tight. But that succeeds basically only limited in time, since the sealing air is oily and soiling the filters to clean the sealing air and then relax in their effect. Another failure cause lies in bonding the openings of transmitter or receiver by dried residues of the cooling lubricant, in particular in the case of using emulsion. This also affects the mechanical Apertures, which often in addition to the use of air purge the Close light exit or light entry openings and should open during use. They occasionally jam dried coolant residues, whose drying by the sealing air is even promoted.
Des
Weiteren ist bekannt, für die Erfassung der bruchbedingten
Verkürzung von Werkzeugen an spanenden Werkzeugmaschinen
einen Kühlschmierstoffstrahl einzusetzen. So ist der
Aus
der
Und
aus der
Das
tut die neuere Erfindung
Der
Erfindung liegt nun die Aufgabe zugrunde, eine verstopfungsunempfindliche
sowie wirklich robuste Vorrichtung zum Erkennen der Ablenkung eines
Prüfstrahls aus Kühlschmierstoff oder Druckluft durch
ein Werkzeug oder Werkstück zu schaffen, die außerdem
keine besonderen zusätzlichen mechanischen Einrichtungen
zur Erzeugung pulsierender Strahlen, nachgiebiger Schalter oder
zweiter Strahle (s.
Diese Aufgabe wird durch Vorrichtungen mit den Merkmalen gemäß Patentanspruch 1 gelöst. Hierbei wird die in einem schnell strömenden Flüssigkeits- oder Druckluftstrahl enthaltene Turbulenz ausgenutzt, die sich insbesondere beim Auftreffen auf ein Hindernis verstärkt und Schalldruckwellen in den beteiligten Maschinenteilen oder der umgebenden Luft erzeugt.These The object is achieved by devices with the features according to claim 1 solved. Here, in a fast-flowing Liquid or compressed air jet contained turbulence exploited, especially when hitting an obstacle amplified and sound pressure waves in the involved machine parts or the surrounding air.
Vorteilhafte Ausgestaltungen ergeben sich auch aus den Unteransprüchen.advantageous Embodiments also result from the dependent claims.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden näher beschrieben.embodiments The invention are illustrated in the drawings and are in Described in more detail below.
Überschreitet
der Vibrationspegel einen bestimmten Grenzwert, der oberhalb der
Grundvibrationen beispielsweise der Halterung des Vibrationssensors
Anstatt
den Kühlschmierstoffstrahl
Die
Vibrationen durch die Turbulenzen eines auftreffenden Kühlschmierstoffstrahls
Die
Auswertung der dort gemessenen Vibrationen erfolgt logisch nun genau
anders herum als bei den oben beschriebenen Methoden zu
Die
Vibrationen eines auf dem Werkzeug auftreffenden Druckluftstrahls
Das in den Figuren als Bohrer gezeigte Werkzeug kann auch ein Fräser, Schleifstift, Stanzwerkzeug oder ein beliebiges anderes Werkzeug sein, das durch den Bruch einer Schneide sich verkürzt und dadurch einen Kühlschmierstoff- oder Durckluftstrahl anders ablenkt als im intakten Zustand.The a tool shown in the figures as a drill can also be a milling cutter, Grinding pin, punching tool or any other tool, which shortens itself by the break of a cutting edge and thereby deflects a cooling lubricant or compressed air jet differently as in the intact state.
In allen genannten vier Methoden kann das Werkzeug auch durch ein Werkstück ersetzt werden, wenn es darum geht zu kontrollieren, ob ein Werkstück durch ein Abstechwerkzeug oder eine Säge ordnungsgemäß abgetrennt wurde. Diese Aufgabe stellt sich in Stangendrehautomaten oder Rundtaktautomaten, die vom Coil arbeiten.In All the above four methods can also be achieved by a workpiece be replaced when it comes to controlling whether a workpiece properly separated by a parting tool or a saw has been. This task arises in automatic bar turning machines or rotary indexing machines, that work from the coil.
Der Anwendungsbereich dieser Erfindung bezieht sich auch auf die Kontrolle der vollständigen Abarbeitung von Material, wie beispielsweise bei der Herstellung einer Durchgangsbohrung. Hierzu wird das Prüfmedium Kühlschmierstoff oder Druckluft durch die Bohrung gedrückt oder geschossen und das Austreten des Mediums am anderen Ende der Bohrung durch das Auftreffen auf einen Vibrationssensor mit oder ohne vorgeschaltete Prallplatte überprüft.The scope of this invention also relates to the control of complete processing of material, such as in the production of a through bore. For this purpose, the test medium coolant or compressed air is pressed or shot through the hole and the leakage of the medium at the other end of the Bore checked by hitting a vibration sensor with or without upstream baffle plate.
Zur Sicherstellung der Funktionsfähigkeit der genannten Methoden in Arbeitsraum einer Werkzeugmaschine ist in der Regel eine frequenzselektive Auswertung der Vibrationen erforderlich, um ausreichend resistent gegenüber Fehlschaltungen zu sein, die sich beispielsweise durch herumspritzenden Kühlschmierstoff aus anderen Kühlschmierstoffdüsen oder durch laufende Antriebe ergeben. D. h. die Frequenzen störender Nebengeräusche werden elektronisch bedampft, bevor der Vibrationspegel mit dem Grenzwert verglichen wird.to Ensuring the functionality of the mentioned methods in working space of a machine tool is usually a frequency-selective evaluation the vibrations required to be sufficiently resistant To be faulty, for example, by spraying coolant from other coolant nozzles or by running Drives result. Ie. the frequencies of disturbing background noises are electronically vaporized before the vibration level with the Limit value is compared.
- 11
- Spindelgehäusespindle housing
- 22
- Werkzeugaufnahme mit Werkzeugspindeltool holder with tool spindle
- 3a, b3a, b
-
Zerspanungswerkzeug
intakt
3a und gebrochen3b Cutting tool intact3a and broken3b - 4a, b4a, b
-
Zuführung
von Kühlschmierstoff
4a oder Druckluft4b Supply of cooling lubricant4a or compressed air4b - 55
- Strahlformer mit Strahldüsebeamformer with jet nozzle
- 6a, b6a, b
-
Kühlschmierstoffstrahl
6a oder Druckluftstrahl6b Coolant jet6a or compressed air jet6b - 77
- Vom Werkzeug abgelenkter Kühlschmierstoff- oder Druckluftstrahlfrom Tool deflected coolant or compressed air jet
- 8a8a
- Vibrationssensor mit rückwärtiger Befestigungsmöglichkeit (Gewinde, hier beispielhaft mit Kabelführung durch das Gewinde)vibration sensor with rear attachment option (Thread, here by way of example with cable guide through the Thread)
- 8b8b
- Vibrationssensor zur Befestigung auf der Fläche, von der er Schwingungen aufnimmtvibration sensor for attachment to the surface from which he oscillates picks up
- 99
- Prallplatte oder Auskleidungsblech des Arbeitsraums der Werkzeugmaschineflapper or lining sheet of the working space of the machine tool
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - CH 412520 [0002] - CH 412520 [0002]
- - EP 0657245 A1 [0003] EP 0657245 A1 [0003]
- - JP 2001-150301 A [0004, 0006] - JP 2001-150301 A [0004, 0006]
- - DE 10240764 B4 [0005] - DE 10240764 B4 [0005]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008009570A DE102008009570A1 (en) | 2008-02-16 | 2008-02-16 | Break-condition detecting method for machine tool of automatic lathe, involves determining whether path of lubricant or radiations is deflected, and measuring and comparing changed vibrations and/or acoustic waves with threshold values |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008009570A DE102008009570A1 (en) | 2008-02-16 | 2008-02-16 | Break-condition detecting method for machine tool of automatic lathe, involves determining whether path of lubricant or radiations is deflected, and measuring and comparing changed vibrations and/or acoustic waves with threshold values |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102008009570A1 true DE102008009570A1 (en) | 2009-08-20 |
Family
ID=40874063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008009570A Withdrawn DE102008009570A1 (en) | 2008-02-16 | 2008-02-16 | Break-condition detecting method for machine tool of automatic lathe, involves determining whether path of lubricant or radiations is deflected, and measuring and comparing changed vibrations and/or acoustic waves with threshold values |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102008009570A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112894487A (en) * | 2021-01-22 | 2021-06-04 | 苏州维嘉科技股份有限公司 | Broken cutter detection device and method of circuit board processing equipment |
CN113352148A (en) * | 2021-08-10 | 2021-09-07 | 山东中科普锐检测技术有限公司 | Integrated type broken cutter detection device and detection method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH412520A (en) | 1962-09-04 | 1966-04-30 | Ceske Z Motocyklove Narodni Po | Device for checking cutting tools |
DE3627796C1 (en) * | 1986-08-16 | 1987-10-22 | Klaus Dipl-Ing Nordmann | Device for monitoring the state and breakage of rotating tools by means of measurements of structure-borne sound |
EP0657245A1 (en) | 1993-12-07 | 1995-06-14 | Paul-André Audemars | Device for detecting breakage or presence of a tool, using a fluid-jet |
JP2001150301A (en) | 1999-11-26 | 2001-06-05 | Taco Co Ltd | Cutting system |
DE10240764A1 (en) * | 2002-08-30 | 2004-03-18 | Nordmann, Klaus, Dr.-Ing. | Broken tool detection device for use with a machine tool, uses the lubrication jet together with a pressure measurement arrangement to monitor the change in blocking pressure caused by the presence or absence of a tool |
-
2008
- 2008-02-16 DE DE102008009570A patent/DE102008009570A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH412520A (en) | 1962-09-04 | 1966-04-30 | Ceske Z Motocyklove Narodni Po | Device for checking cutting tools |
DE3627796C1 (en) * | 1986-08-16 | 1987-10-22 | Klaus Dipl-Ing Nordmann | Device for monitoring the state and breakage of rotating tools by means of measurements of structure-borne sound |
EP0657245A1 (en) | 1993-12-07 | 1995-06-14 | Paul-André Audemars | Device for detecting breakage or presence of a tool, using a fluid-jet |
JP2001150301A (en) | 1999-11-26 | 2001-06-05 | Taco Co Ltd | Cutting system |
DE10240764A1 (en) * | 2002-08-30 | 2004-03-18 | Nordmann, Klaus, Dr.-Ing. | Broken tool detection device for use with a machine tool, uses the lubrication jet together with a pressure measurement arrangement to monitor the change in blocking pressure caused by the presence or absence of a tool |
DE10240764B4 (en) | 2002-08-30 | 2005-07-28 | Nordmann, Klaus, Dr.-Ing. | Device for detecting the position and the fracture-related shortening of a tool or workpiece in a machine tool |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112894487A (en) * | 2021-01-22 | 2021-06-04 | 苏州维嘉科技股份有限公司 | Broken cutter detection device and method of circuit board processing equipment |
CN113352148A (en) * | 2021-08-10 | 2021-09-07 | 山东中科普锐检测技术有限公司 | Integrated type broken cutter detection device and detection method |
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---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |