DE1072863B - Hydraulic cutting edge lift-off for drilling tools - Google Patents
Hydraulic cutting edge lift-off for drilling toolsInfo
- Publication number
- DE1072863B DE1072863B DENDAT1072863D DE1072863DA DE1072863B DE 1072863 B DE1072863 B DE 1072863B DE NDAT1072863 D DENDAT1072863 D DE NDAT1072863D DE 1072863D A DE1072863D A DE 1072863DA DE 1072863 B DE1072863 B DE 1072863B
- Authority
- DE
- Germany
- Prior art keywords
- cutting edge
- bearing
- drilling tools
- hydraulic cutting
- edge lift
- 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.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims description 4
- 238000005461 lubrication Methods 0.000 claims description 5
- 238000003754 machining Methods 0.000 description 2
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
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
- B23Q1/38—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using fluid bearings or fluid cushion supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
- B23B29/03—Boring heads
- B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Description
Hydraulische Schneidenabhebung bei Bohrwerkzeugen Zur Schonung der Schneide und der bearbeiteten Oberfläche (Vermeidung des Rückzugsrisses) ist es. bei spanabhebenden Bearbeitungen üblich, nach erfolgter Bearbeitung die Schneide beim Zurückführen des Werkzeuges in die Ausgangsstellung vom Werkstück abzuheben. Bei Bohrwerkzeugen, insbesondere Bohrstangen mit einer festeingestellten Schneide, muß hierzu die Bohrstange aus ihrer zentralen Lage entgegen. der Schneidenrichtung weggedrückt werden. Dies kann auf verschiedene Arten erfolgen.Hydraulic cutting edge lifting on drilling tools To protect the It is the cutting edge and the machined surface (avoiding the retraction crack). Common for machining operations, the cutting edge after machining has been carried out lift off the workpiece when the tool is returned to its starting position. For drilling tools, especially boring bars with a fixed cutting edge, this must counteract the boring bar from its central position. the direction of the cutting edge be pushed away. This can be done in a number of ways.
Bei gleitgelagerten Spindeln wird meist das Lagerspiel dazu benutzt, die Spindel um einen kleinen Betrag aus der Mittellage zu bewegen. Bei Spindeln ohne Lagerspiel (Wälzlagerung) muß entweder die Spindel oder die Bohrstange deformiert (durchgebogen) werden. Dies kann z. B. dadurch erfolgen, daß die Bohrstange beim Zurückführen mit einem Gegenhalter gekuppelt wird, der in eine exzentrische Führung der Bohrstange eingreift und diese so aus der Mittellage drückt, daß entweder die Bohrstange deformiert oder das Lagerspiel hierfür ausgenutzt wird.In the case of spindles with slide bearings, the bearing play is usually used to move the spindle a small amount from the center position. With spindles Without bearing play (roller bearings), either the spindle or the boring bar must be deformed (bent). This can e.g. B. be done in that the boring bar when Return is coupled with a counterholder, which is in an eccentric guide engages the boring bar and pushes it out of the central position that either the The boring bar is deformed or the bearing play is used for this purpose.
Ein anderes Verfahren verwendet magnetostriktive Kräfte, um eine Durchbiegung der Bohrstange zu erreichen.Another method uses magnetostrictive forces to deflect to reach the boring bar.
Bei der Erfindung handelt es sich um eine Schneidenabhebung bei gleitgelagerten Spindeln, wobei die Abhebung innerhalb des Lagerspieles durch Kräfte in einem der beiden Gleitlager der Spindel erfolgt. Je nach der Anordnung der Bohrstange kann das vordere oder hintere Lager hierfür benutzt werden. Die Schmiertaschen des Gleitlagers mit der Abhebung sind zu diesem Zwecke auf der Spindel angeordnet, und zwar so, daß mindestens eine der Taschen in axialer Richtung versetzt ist und aus einer besonderen Ölleitung gespeist wird. Für den normalen Lauf der Spindel sind alle Schmiertaschen an die Druckölversorgung angeschlossen. Zum Abheben der Bohrstange wird nur die eine Schmiertasche mit Drucköl versorgt.The invention relates to a cutting edge lift-off in slide bearings Spindles, the lifting within the bearing play by forces in one of the both slide bearings of the spindle takes place. Depending on the arrangement of the drill rod the front or rear bearing can be used for this. The lubrication pockets of the plain bearing with the lift-off are arranged on the spindle for this purpose, as follows: that at least one of the pockets is offset in the axial direction and from a special one Oil line is fed. For the normal running of the spindle, all are lubrication pockets connected to the pressure oil supply. To lift the boring bar, only the a lubrication pocket is supplied with pressure oil.
Aus den Abbildungen ist die Lage der Schmiertaschen auf der Welle beispielsweise zu ersehen. Es zeigt Fig. 1 einen Längsschnitt C-D durch das Lager, Fig. 2 die Abwicklung des Lagers, Fig. 3 einen Querschnitt A-B durch das Lager. Es sind insgesamt vier Taschen vorgesehen, wovon die Tasche 1 gegenüber den anderen, 1, 3, 4, in axialer Richtung versetzt ist und durch den Ringkanal s der Lagerschale 6 gespeist wird. Die übrigen drei Öltaschen werden von dem Ringkanal 7 der Lagerschale 6 versorgt. Im normalen Betrieb des Lagers sind beide Kanäle 5 und 7 an dieselbe Ölversorgung angeschlossen. Zum Abheben wird der Ölstrom nur auf den Ringkanal s geleitet, wodurch die Welle in die entgegengesetzte Richtung von Öltasche 1 gedrückt wird. Die Schneide muß also in der Ebene der Tasche 1 liegen, und zwar auf derselben Seite, wenn die Abhebung im vorderen Lager erfolgt.The illustration shows the position of the lubrication pockets on the shaft, for example. 1 shows a longitudinal section CD through the bearing, FIG. 2 shows the development of the bearing, FIG. 3 shows a cross section AB through the bearing. A total of four pockets are provided, of which pocket 1 is offset in the axial direction with respect to the others, 1, 3, 4, and is fed through the annular channel s of the bearing shell 6. The remaining three oil pockets are supplied by the annular channel 7 of the bearing shell 6. During normal operation of the bearing, both channels 5 and 7 are connected to the same oil supply. To lift off, the oil flow is only directed to the ring channel s, which pushes the shaft in the opposite direction from oil pocket 1. The cutting edge must therefore lie in the plane of the pocket 1 , on the same side when the lift-off takes place in the front bearing.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
DE1072863B true DE1072863B (en) | 1960-01-07 |
Family
ID=597239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT1072863D Pending DE1072863B (en) | Hydraulic cutting edge lift-off for drilling tools |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1072863B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0000294A1 (en) * | 1977-06-27 | 1979-01-10 | Regie Nationale Des Usines Renault | Tool retraction device on a machine tool |
EP0105050A1 (en) * | 1982-09-30 | 1984-04-11 | Fürstlich Hohenzollernsche Hüttenverwaltung Laucherthal | Hydrostatic bearing |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE923410C (en) * | 1952-12-05 | 1955-02-10 | Nabenfabrik Alfing | Boring bar lifting device |
-
0
- DE DENDAT1072863D patent/DE1072863B/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE923410C (en) * | 1952-12-05 | 1955-02-10 | Nabenfabrik Alfing | Boring bar lifting device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0000294A1 (en) * | 1977-06-27 | 1979-01-10 | Regie Nationale Des Usines Renault | Tool retraction device on a machine tool |
EP0105050A1 (en) * | 1982-09-30 | 1984-04-11 | Fürstlich Hohenzollernsche Hüttenverwaltung Laucherthal | Hydrostatic bearing |
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