DE688315C - Drilling device with long drill rod and load cell - Google Patents
Drilling device with long drill rod and load cellInfo
- Publication number
- DE688315C DE688315C DE1937SC113173 DESC113173D DE688315C DE 688315 C DE688315 C DE 688315C DE 1937SC113173 DE1937SC113173 DE 1937SC113173 DE SC113173 D DESC113173 D DE SC113173D DE 688315 C DE688315 C DE 688315C
- Authority
- DE
- Germany
- Prior art keywords
- load cell
- drill rod
- drill head
- drilling device
- drill
- 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
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Description
Es ist bekannt, den Bohrdruck (Schnittdruck am Bohrwerkzeug) mit Hilfe von Meßdosen in der Weise zu messen, daß man die Bohrstange im Bohrschlitten nicht fest ein-S spannt, sondern drehbar lagert und das Drehen der Bohrstange unter Einwirkung des Schnittdruckes durch die Meßdose verhindert; so daß sich der Schnittdruck auf diese überträgt. Hierbei wird die notwendig im Bohrschlitten befestigte Meßdose von dem Bohrwerkzeug um die Länge der Bohrstange entfernt sein, d.h. der Schnittdruck wird über die Bohrstange zur Meßdose geleitet. Diese Anordnung führt bei sehr langen Bohrstangen zu Verlusten, insbesondere durch. Reibung der schweren und langen Bohrstange in ihren Stützlagern und damit zu einer unzuverlässigen Messung des Schnittdru-ckes, ja es kann sogar bei kleinen Schnittdrücken (Fertigbohren) der Fall eintreten, daß der Schnittdruck gegenüber der Reibung verschwindend klein wird und deshalb die Messung versagt. Zweck der vorliegenden Erfindung ist es, diesem Übelstande dadurch abzuhelfen, daß man bei langen Bohrungen von größeren Durchmessern mit den hierdurch bedingten schweren Bohrstangen die Meßdose unmittelbar hinter dem Bohrwerkzeug, d.h. im Bohrkopf selbst anordnet.It is known that the drilling pressure (cutting pressure on the drilling tool) with the help of load cells in such a way that you can measure the The boring bar is not firmly clamped in the boring slide, but rotatably supported and that Rotation of the boring bar under the action of the cutting pressure prevented by the load cell; so that the cutting pressure is transferred to this. This is necessary in the drilling slide attached load cell must be removed from the boring tool by the length of the boring bar, i.e. the cutting pressure will be over the boring bar passed to the load cell. This arrangement works with very long boring bars to losses, especially through. Friction of the heavy and long boring bar in theirs Support bearings and thus an unreliable measurement of the cutting pressure, yes it it can even happen with small cutting pressures (finish drilling) that the Cutting pressure is negligibly small compared to the friction and therefore the Measurement fails. The purpose of the present invention is to remedy this drawback to remedy that one with long bores of larger diameters with this Due to the heavy boring bars, the load cell is placed directly behind the boring tool, i.e. in the boring head itself.
In der Zeichnung ist die Erfindung beispielsweise an einem Bohrkopf veranschaulicht, und zwar zeigen:In the drawing, the invention is illustrated, for example, on a drill head, namely show:
Abb. ι die Vorderansicht des Bohrkopfes, Abb. 2 den Teilquerschnitt in der Linie A-A, Abb. 3 die Draufsicht auf Bohrkopf und Bohrstange.Fig. Ι the front view of the drill head, Fig. 2 the partial cross-section in the line AA, Fig. 3 the top view of the drill head and drill rod.
Der Bohrkopf, welcher in bekannter Weise mit der Bohrstange ι verbunden wird, besteht aus zwei Teilen: dem eigentlichen, die Werkzeuge tragenden Bohrkopf 2 und einem Mitnehmerbolzen 3. Bohrkopf 2 greift mit dem Kuppelansatz 4 in einen entsprechenden Schlitz des Bolzens 3 ein, in welch letzterem der Kuppelansatz eine kleine Beweglichkeit zuläßt; diese wird verhindert durch die im Kuppelansatz 4 eingeschraubte Meßdose 5, die sich mit ihrem Ansatz 6 gegen den Bolzen 3 anlegt. Diese Anlage wird gesichert durch die Feder 7, auf welche Schraube 8 im Bolzen 3 drückt. Weiter zeigt die Zeichnung bei 9 das Bohrwerkzeug, bei 10 die Führungen des Bohrkopfes in der Bohrung. Die Wirkungsweise der Meßeinrichtung ist folgende: The drill head, which is connected to the drill rod in a known manner, consists consists of two parts: the actual drill head 2 carrying the tools and a driving pin 3. Drill head 2 engages with the dome attachment 4 in a corresponding one Slot of the bolt 3, in which the latter the dome approach a little mobility allows; this is prevented by the load cell 5 screwed into the dome attachment 4, which its approach 6 rests against the bolt 3. This facility is secured by the spring 7, on which screw 8 in the bolt 3 presses. Next shows the drawing at 9 the drilling tool, at 10 the guides of the drill head in the bore. the The mode of operation of the measuring device is as follows:
Unter der Wirkung des Schnittdruckes P sucht sich der Bohrkopf 2 gegen den Bolzen 3 zu verdrehen und wird durch die Meßdose daran gehindert, so daß sich der Schnittdruck unmittelbar auf diese überträgt, wobei die Bohrstange als im Bohrschlitten unverdrehbar fest eingespannt angenommen ist.Under the action of the cutting pressure P , the drill head 2 tries to rotate against the bolt 3 and is prevented from doing so by the load cell, so that the cutting pressure is transmitted directly to it, the drill rod being assumed to be firmly clamped in the drill carriage so that it cannot rotate.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1937SC113173 DE688315C (en) | 1937-06-30 | 1937-06-30 | Drilling device with long drill rod and load cell |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1937SC113173 DE688315C (en) | 1937-06-30 | 1937-06-30 | Drilling device with long drill rod and load cell |
Publications (1)
Publication Number | Publication Date |
---|---|
DE688315C true DE688315C (en) | 1940-02-17 |
Family
ID=7449801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1937SC113173 Expired DE688315C (en) | 1937-06-30 | 1937-06-30 | Drilling device with long drill rod and load cell |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE688315C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1298844B (en) * | 1962-02-07 | 1969-07-03 | Folsom William A | Device for displaying the course of an axially movable, non-rotatable drilling tool |
US5228813A (en) * | 1989-08-16 | 1993-07-20 | Komet Prazisionswerkzeuge Robert Breuning Gmbh | Tool for use in machine tools |
-
1937
- 1937-06-30 DE DE1937SC113173 patent/DE688315C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1298844B (en) * | 1962-02-07 | 1969-07-03 | Folsom William A | Device for displaying the course of an axially movable, non-rotatable drilling tool |
US5228813A (en) * | 1989-08-16 | 1993-07-20 | Komet Prazisionswerkzeuge Robert Breuning Gmbh | Tool for use in machine tools |
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