WO2017046385A1 - Spindle head and machine tool - Google Patents

Spindle head and machine tool Download PDF

Info

Publication number
WO2017046385A1
WO2017046385A1 PCT/EP2016/072060 EP2016072060W WO2017046385A1 WO 2017046385 A1 WO2017046385 A1 WO 2017046385A1 EP 2016072060 W EP2016072060 W EP 2016072060W WO 2017046385 A1 WO2017046385 A1 WO 2017046385A1
Authority
WO
WIPO (PCT)
Prior art keywords
coupling
drive shaft
machine tool
spindle head
drive
Prior art date
Application number
PCT/EP2016/072060
Other languages
German (de)
French (fr)
Inventor
Heinz Stenzel
Thorsten Rettich
Original Assignee
J.G. Weisser Soehne Gmbh & Co. Kg
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
Priority to DE102015012265.7A priority Critical patent/DE102015012265A1/en
Priority to DE102015012265.7 priority
Application filed by J.G. Weisser Soehne Gmbh & Co. Kg filed Critical J.G. Weisser Soehne Gmbh & Co. Kg
Publication of WO2017046385A1 publication Critical patent/WO2017046385A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/12Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general

Abstract

The invention relates to a spindle head (1) and a machine-tool, having a clutch (26) that is arranged between a first drive shaft (6) of the spindle head (1) and a second drive shaft (9) of a drive (10), wherein the clutch (26) comprises a clutch part (14) with an end-side clutch surface (14a) and a mating clutch part (15) with an end-side mating clutch surface (15a), the clutch surface (14a) having at least one projection (17) that extends in the axial direction and tapers away from the clutch part (14), and the mating clutch surface (15a) has at least one recess (18) that extends in the axial direction and narrows toward the mating clutch part (15), wherein the projection (17) can be brought into engagement with the recess (18), preferably without play.

Description

 Spindle head and machine tool

The present invention relates to a spindle head for a machine tool with a drivable via a first drive shaft tool holder and a machine tool for replaceable spindle heads. Such a machine tool is known in ¬ example from DE 41 08 038 AI.

In particular, machine tools are known in which several tools are each kept on a spindle head. For this purpose, the spindle heads each have a tool spindle, in which a tool holder is rotatably mounted about an axis. To execute the associated processing step, the spindle head is connected to a drive by means of a coupling. For example, such spindle heads are used to carry out drilling or milling.

When a tool is changed, the drive must be decoupled. As soon as the new tool is in the working position, the drive is reconnected. The drive is used to generate the tool movement. Conventional couplings are designed here as a radial ¬ couplings, in which on the part of Spindle head an external toothing and on the side of the drive to an internal toothing are formed, which engage in a coupled state in one another. Since these coupling part must be inserted into each other, the clutch has neces sary a game, which may be depending on the spindle head in the order of 10-70 m order.

This is not significant in milling and / or drilling tools, but then plays a role when the tool has, for example, a curved cutting edge, which must be moved in example for low-twist rotation in a well-defined sequence of movements. Here, such a game can be harmful. In particular, when a change of direction of the control movement first the game must be run through, be ¬ before the tool can perform the desired movement.

On this basis, it is an object of the present inven tion ¬ tion to provide a lower-play coupling a spindle head to a drive.

This object is achieved by the in claim 1 inven ¬ tion. Advantageous embodiments can be found in the dependent claims.

According to the spindle head of the type described above for solving the problem thus provided in particular that at least one axially oriented projection and / or at least one axially oriented recess for forming a coupling part of a coupling is formed on the first drive shaft at a drive end.

In an advantageous embodiment, provision can be made for the projection to be rejuvenated toward a drive-side end. is formed and / or that the recess is formed widened to a tool-side end. The advantage here is that a nearly or even completely play-free coupling can be achieved.

In an advantageous embodiment it can be provided that at least two circumferentially spaced apart projections and / or at least two circumferentially spaced apart from each other recesses are formed at the drive end of the first drive shaft. The advantage here is that a positive torque transmission to a plurality of coupling means is divisible.

According to the invention, a machine tool is provided with a clutch which is arranged between a first drive shaft of a spindle head and a second drive shaft of a drive, wherein the clutch comprises a coupling part with an end face coupling surface and a counter coupling part with a front side counter coupling surface, wherein the coupling surface at least has a projection extending in the axial direction and tapering away from the coupling part, and the counter-coupling surface has at least one recess extending in the axial direction and narrowing towards the counter-coupling part, wherein the projection can be brought into engagement with the recess. Preferably, the configuration is such that the projections are engageable with the recesses without play. This is particularly beneficial when changing the direction of rotation of the tool to be performed. According to the invention, the spindle head is preferably designed in this case, in particular as described above and / or according to one of the claims directed to a spindle head. In particular, the at least one projection and the at least one recess are shaped complementarily to one another and can be brought into engagement with one another in a form-fitting manner. The invention accordingly provides for the use of a coupling in which a coupling part has at least one projection tapering towards a free end and a counter coupling part having at least one complementarily configured receptacle. In this case, the coupling is aligned on the end side or axially instead of radially. As a result, an approximately play-free positive connection can be produced.

The taper of the projection cooperates with the complementary shaped constriction of the recess. The advantage here is that can be achieved by the taper regardless of manufacturing tolerances, that with sufficient axial adjustment a backlash-free positive connection is made.

In particular, the at least one projection on an end face of the drive shaft and the at least one recess are arranged on an opposite end face of a coupling element.

In an advantageous embodiment, it can be provided that the coupling part is arranged on the tool side on the coupling and the counter-coupling part is arranged on the transmission side antr iebsseitig. Alternatively, conversely, it may be provided that the coupling part is arranged on the drive side of the coupling and the mating coupling part is arranged on the tool side on the coupling.

The coupling between the first drive shaft and the second drive shaft is direct or indirect, that is, additional between the first drive shaft and the be provided second drive shaft arranged connection or transmission parts.

It is particularly favorable if the coupling part has a plurality of such projections, in particular distributed at regular intervals and / or along a circumference. In this way, a particularly secure positive connection can be provided. In one embodiment, four projections are provided on the coupling part and four complementary recesses are provided in the counter coupling part, wherein the projections and recesses are each arranged at uniform intervals and / or along a circumference of the coupling or mating coupling surfaces. In one embodiment of the invention, the clutch ¬ surfaces each comprise an end face gear, in particular Hirth-type toothing. Hirth toothing is particularly easy to manufacture. In one embodiment, the invention provides a cooling fluid supply in the tool spindle and an annular transfer region in the housing of the tool spindle, which open into cooling fluid passages in the tool or tool carrier. Such a cooling fluid supply is also referred to as a rotary feedthrough. With this rotary feedthrough and subsequent cooling channels, which are initially performed radially and then axially in the tool spindle, a coupling of the cooling circuit or the lubrication circuit to internally supplied tools is executable. Thus, the coolant or Kühlf luid be passed directly into the processing zone.

In one embodiment, at least one shaft sealing ring is provided between the annular transfer region and a spindle bearing. This improves the sealing of the rotary implementation opposite the spindle bearing. In particular, the shaft seal consists of a harder material than the tool spindle and / or the housing of the spindle head. This he ¬ enables that after a short running organg a better fit of the shaft seal is achieved.

The invention further provides a coupling element for a machine tool of the type described above, wherein the coupling surface or the mating coupling surface is formed at a front end of the coupling element. In other words, the coupling surface or the Ge ¬ genkupplungsfläche is arranged on a separate coupling element, which is coupled on the one hand with the first drive shaft and on the other hand with the second drive shaft.

In order to continue to use existing and known spindle heads, the coupling element may additionally have an internal toothing, in which instead of a coupling part with tapered projections, a standard coupling part with external teeth can be used. Thus, the number of un ¬ te different usable spindle heads can be increased.

Hereinafter, an embodiment of the invention is described in more detail with reference to the drawings. However, the invention is not limited to the exemplary embodiment. Further embodiments result from the combination of features of one or more protection claims among each other and / or with one or more features of exporting approximately ¬ example.

It shows in a schematic representation:

1 shows a cross section through a machine tool according to an embodiment of the invention, 2 is a perspective view of a coupling with egg nem spindle head according to the invention for a machine tool according to an embodiment of the inven tion,

3 shows a further perspective view of the spindle head according to FIG. 2 and FIG. 4 shows a further perspective view of the spindle head according to FIG. 2.

In the following, Figs. 1 to 4 are described together, whereby functionally and / or structurally similar or identical components and functional units thus provided with Densel ¬ reference symbols and are not described separately.

1 shows schematically a cross section through a part of a machine tool according to an embodiment of the invention. The machine tool comprises a spindle head 1, in which a tool spindle 2 is rotatably arranged by means of a spindle bearing 3. The tool spindle 2 has a tool holder 4 with a tool 5 received therein.

The tool spindle 2 merges at an end face into a drive shaft 6, which extends radially out of the spindle head and extends at least partially within a receiving shaft 7. At its free end face, the drive to 10 facing end 22, the drive shaft 6 has a coupling surface 14 a, which can be brought into engagement with a complementary mating coupling surface 15 a of a coupling element 8, as described below. The drive shaft 6 facing away, so the drive side end face of the coupling element 8 is coupled to a second drive shaft 9 of a drive 10. In the engaged state, the drive 10 sets the second drive shaft 9 and thus the tool spindle 2 and the tool 5 received therein in rotation. The coupling element 8 is arranged on the tool-side end 23 of the second drive shaft 9.

In one embodiment, the invention provides a rotary feedthrough for supplying coolant into the processing zone. The rotary feedthrough comprises feed channels 11 and 12 in the tool holder 4 and the tool spindle 2, can be supplied through the coolant via an annular transfer area 13 in the housing of the spindle head 1 and a cooling of the tool 5 during machining of a workpiece. The annular transfer region 13 opens into the feed channel 12, which initially extends radially inwards and then axially, opens into the tool holder 4 and is connected to the feed channel 11.

Figures 2 to 4 show a coupling 26 between the drive shaft 6 and the coupling element 8 according to an embodiment of the invention. The coupling 26 comprises on the tool side a coupling part 14 which has a coupling surface 14a at its free end-side, drive-side end 22, and a counter-coupling part 15 on the drive side. The coupling surface 14a is provided with a mating coupling surface 15a of a mating coupling part 15 on the drive side In the embodiment shown, the coupling part 14 forms part of the drive shaft 6 and is formed on the drive-side end 22 of the drive shaft 6, while the counter-coupling part 15 is a part of Coupling element 8 forms and on the tool-side end

23 of the second drive shaft 9 is arranged. The mating coupling part 15 can be coupled to the drive 10 or non-rotatably connected.

The coupling surface 14 a has a plurality of trapezoidal Vorsprün ¬ ge 17, which are arranged along the circumference of the coupling part 14. The trapezoidal form, a condition that the pre ¬ cracks 17 are each in the axial direction, which is given by the rotational ¬ axis of the coupling 26, to the drive end

24 of the projections 17 toward, so towards the drive 10 back, taper. The counter-coupling surface 15a has complementary trapezförmi ¬ ge recesses 18 along the circumference of end portion 19 of the Cylind ¬ step counter-coupling part 15 duri ¬ fen. Here, the trapezoidal shape causes the recesses 18 to expand in the axial direction towards the tool-side end 25 of the recesses 19.

Due to the corresponding, complementary formations of the projections 17 and the recesses 18 to each other is achieved that the trapezoidal projections 17 can engage in the recesses 18, whereby a play-free coupling between the drive shaft 6 and the coupling element 8 can be produced without an axial position of the Contact point for the power transmission must be specified.

15 Moreover, the mating coupling component to a cylindrical inner wall 20 of the cylindrical end portion 19 has internal teeth 21 which with a complementary external tooth system on a further drive shaft 6 - are brought into engagement - the no projections having at ¬ play 17 and / or is formed conventionally can. In summary, the invention thus relates to a spindle ¬ head 1 and a machine tool, with a coupling 26 which is disposed between a first drive shaft 6 of the spindle head 1 and a second drive shaft 9 of a drive 10, wherein the coupling 26 is a coupling part 14 with a front-side coupling surface 14a and a counter-coupling part 15 having an end-side counter-coupling surface 15a, wherein the coupling surface 14a has at least one extending in the axial direction and tapering away from the coupling part 14 projection 17, and the counter-coupling surface 15a at least one extending in the axial direction and the counter-coupling part 15th has narrowing out ¬ saving 18, wherein the projection 17 is preferably engageable with the recess 18 without play.

LIST OF REFERENCE NUMBERS

1 spindle head

 2 tool spindle

 3 spindle bearings

 4 tool holder

 5 tool

 6 drive shaft

 7 sewing shaft

 8 coupling element

 9 drive shaft

 10 drive

 11 Feed channel in the tool holder

12 Feed channel in the tool spindle

13 rotary feedthrough

 14 coupling part

 14a coupling surface

 15 counter coupling part

 15a counter-coupling surface

 16 coupling surface on the coupling element

17 (trapezoidal) protrusions

 18 (trapezoidal) recesses

 19 cylindrical section

 20 cylindrical inner wall

 21 Inside drafts

 22 drive end of 6

 23 tool end of 9

 24 drive end of 17

 25 tool end of 18

 26 clutch

Claims

 claims
Spindle head (1) for a machine tool, with a tool holder (4) drivable via a first drive shaft (6), characterized in that at least one axially oriented projection (17) and at the drive end (22) on the first drive shaft (6) / or at least one axially oriented recess (18) for forming a coupling part (14) of a coupling (15) is formed.
Spindle head (1) according to claim 1, characterized in that the projection (17) is tapered towards a drive-side end and / or that the recess (18) is formed widened towards a tool-side end.
Spindle head (1) according to claim 1 or 2, characterized in that at the drive end of the first drive shaft (6) at least two circumferentially spaced apart projections (17) and / or at least two circumferentially spaced apart recesses (18) are formed.
Machine tool, with a coupling (26) which is arranged between a first drive shaft (6) of a spindle head (1), in particular a spindle head (1) according to one of the preceding claims, and a second drive shaft (9) of a drive (10), wherein the coupling ¬ ment (26) comprises a coupling part (14) with a front-side coupling surface (14a) and a counter-coupling part (15) with a front-side counter-coupling surface (15a), wherein the coupling surface (14a) at least one extending in the axial direction and from the coupling and the mating coupling surface (15a) has at least one recess (18) which extends in the axial direction and narrows towards the mating coupling part (15), the projection (17) having the recess (17). 18) can be brought into engagement.
Machine tool according to one of the preceding claims, wherein the at least one projection (17) and the at least one recess (18) formed complementary to each other and formschiüssig are preferably engageable with each other without play.
Machine tool according to one of the preceding claims, wherein the coupling part (14) or the counter-coupling part (15) by a coupling element (8) is formed, which on the one hand with the first drive shaft (6) and on the other hand with the second drive shaft (9) can be coupled.
Machine tool according to the preceding claim, wherein the at least one projection (17) on one end face of the first drive shaft (6) and the at least one recess (18) on an opposite end face of the coupling element (8) is arranged, and / or wherein the coupling part ( 14) is arranged on the tool side on the coupling and the counter-coupling part (15) is arranged on the drive side on the coupling (26).
Machine tool according to one of the preceding claims, comprising in each case at least two, in particular four projections (17) and complementary recesses (18), wherein the projections (17) and recesses (18) in each case at regular intervals and / or along a Nes circumference of the coupling surface (14a) and / or the Ge ¬ genkupplungsfläche (15a) are arranged.
9. Machine tool according to one of the preceding claims, wherein the coupling surface (14a) and the counter-coupling surface (15a) mutually complementary Planverzah ¬ calculations, in particular Hirth gears have.
10. Machine tool according to one of the preceding claims che, comprising a rotary feedthrough in the spindle head
(1) ·
11. Machine tool according to the preceding claim, wherein the rotary feedthrough comprises an annular transfer region (13) in the housing of the spindle head (1), which opens into a feed channel (12), within the tool spindle (2) starting from the annular transfer region (13). radially and then axially in the direction of the tool (5) and / or a machining zone of the tool (5).
12. Machine tool according to the preceding claim, wherein between the annular transfer region (13) and a spindle bearing (3) is provided at least one shaft seal, in particular a shaft seal made of a harder material than the tool spindle (2) and / or the housing of the spindle head (1).
13. Coupling element (8) for a machine tool according to one of the preceding claims, wherein the coupling surface (14a) or the counter-coupling surface (15a) at ei ¬ nem front end of the coupling element (8) is gebil ¬ det. Coupling element (8) according to claim 10, wherein the counter-coupling surface (15) at an end face of the coupling element (8) is formed, and wherein at this front end a Innenve toothing (21) is provided, with the complementary external toothing of a drive shaft in engagement can be brought.
PCT/EP2016/072060 2015-09-19 2016-09-16 Spindle head and machine tool WO2017046385A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102015012265.7A DE102015012265A1 (en) 2015-09-19 2015-09-19 Spindle head and machine tool
DE102015012265.7 2015-09-19

Publications (1)

Publication Number Publication Date
WO2017046385A1 true WO2017046385A1 (en) 2017-03-23

Family

ID=57103968

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/072060 WO2017046385A1 (en) 2015-09-19 2016-09-16 Spindle head and machine tool

Country Status (2)

Country Link
DE (1) DE102015012265A1 (en)
WO (1) WO2017046385A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503522A2 (en) * 1991-03-13 1992-09-16 DÖRRIES SCHARMANN GmbH Machine-tool with exchangeable tool-heads
WO2004001249A1 (en) * 2002-06-19 2003-12-31 Asterika Limited Connection device between members of a machine
US20110158744A1 (en) * 2009-12-29 2011-06-30 Dornfeld Michael S Face coupling

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10206168A1 (en) * 2002-02-14 2003-08-21 Guehring Joerg Coupling for modular tool holder arms
JP2004293637A (en) * 2003-03-26 2004-10-21 Kayseven Co Ltd Shaft coupling
DE102007008837A1 (en) * 2007-02-23 2008-08-28 Esa Eppinger Gmbh Coupling device for tool holders or workpiece clamping devices

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503522A2 (en) * 1991-03-13 1992-09-16 DÖRRIES SCHARMANN GmbH Machine-tool with exchangeable tool-heads
WO2004001249A1 (en) * 2002-06-19 2003-12-31 Asterika Limited Connection device between members of a machine
US20110158744A1 (en) * 2009-12-29 2011-06-30 Dornfeld Michael S Face coupling

Also Published As

Publication number Publication date
DE102015012265A1 (en) 2017-03-23

Similar Documents

Publication Publication Date Title
FI75751C (en) Verktygshaollare Foer Borrhammare.
US8950301B2 (en) Skiving tool comprising cutter bars
US4265574A (en) Combined boring and milling tool
KR101542279B1 (en) Tool for rotary cutting machining
JP5390527B2 (en) Rotating tool
JP2001503683A (en) Tools for machining to remove chips
KR20070015104A (en) Rotating cutting insert assembly and method of use
JP2003300110A (en) Drill and manufacturing method therefor
WO2001007189A1 (en) Drill unit with three cutting edges
KR20100138797A (en) A rotatable tool for chip removing machining as well as a loose top therefor
US7117773B2 (en) Turret for turret lathe
US8123439B2 (en) Slotting milling cutter for machining with a high feed and a low pass depth
EP1402979B1 (en) Horizontal boring machine tool
KR101103326B1 (en) Multi-Axial Complex Processing Machine
JP2003340631A (en) Tool, device and method for deburring bore hole
EP2406029A1 (en) Cutting tool for a machine tool
RU2350436C2 (en) Ceramic drill for high-speed drilling
GB2302300A (en) Tool holder and tool for a drilling and/or hammering machine tool
CN101291767A (en) Method for producing sliding sleeves
EP1513643A1 (en) Machining tool, especially a milling tool
KR101528936B1 (en) Drill body
EP2316600B1 (en) Drilling tool
JP2008511466A (en) Spiral groove end mill with multi-section cutting surface
DE102007015357A1 (en) Toothing device for fabricating inner or outer toothed gear wheels, where revs of tool spindle matches a multiple of the workpiece spindle
EP0799106B1 (en) Front-loading rotary ring cutter

Legal Events

Date Code Title Description
DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16777920

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase in:

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16777920

Country of ref document: EP

Kind code of ref document: A1