EP3678814A1 - Device for machining workpieces - Google Patents
Device for machining workpiecesInfo
- Publication number
- EP3678814A1 EP3678814A1 EP18765830.7A EP18765830A EP3678814A1 EP 3678814 A1 EP3678814 A1 EP 3678814A1 EP 18765830 A EP18765830 A EP 18765830A EP 3678814 A1 EP3678814 A1 EP 3678814A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear
- transmission
- unit
- torque
- tooth flanks
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/10—Arrangements for compensating irregularities in drives or indexing mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/12—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by planing or slotting
- B23F5/16—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by planing or slotting the tool having a shape similar to that of a spur wheel or part thereof
- B23F5/163—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by planing or slotting the tool having a shape similar to that of a spur wheel or part thereof the tool and workpiece being in crossed axis arrangement, e.g. skiving, i.e. "Waelzschaelen"
-
- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/043—Accessories for spindle drives
- B23Q5/045—Angle drives
-
- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
- B23Q5/56—Preventing backlash
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
- F16H55/18—Special devices for taking up backlash
Definitions
- the invention relates to a device for machining workpieces, in particular for skiving, with an output unit and a drive unit and arranged between the units Gereteei device that an output torque of the output unit of the Antriebssei n-unit for driving a machining tool available stel lt.
- the skiving method can be used advantageously for the manufacture of gears. Due to the continuous machining process and high cutting speeds, the roller skiving process for machining internal and external gears is highly productive. To achieve the highest surface quality and precision of the geometry of machined tooth flanks, the requirements for the gear mechanism are extremely high, ie for torque transmission between the machining tool and the drive source. The main requirement is that the torque transmission via the transmission device takes place without play or for the least play.
- the invention has the object of providing a device of the type mentioned in the introduction whose transmission device makes it possible to carry out the method of generating skiving with high precision. According to the invention, this object is achieved by a device having the features of patent claim 1.
- the invention provides for the solution of this object a pretensioning device by means of which an at least low-play torque transmission between the transmission device and for the one of the driven-side and drive-side units is achieved.
- a backlash-free or low-backlash gear device advantageously makes it possible to carry out skiving by means of a tool turret in such a way that the machining tool with its drive unit, the gear mechanism and the output unit are combined to form a processing unit can be attached to one of the receptacles of the tool disc of a tool turret, wherein in the normal manner during tool turrets, the output unit engages the inner drive of the tool disc in the coupling connection.
- the arrangement is such that by means of the pretensioning device at the same time a torque transmission with low backlash is achieved between the transmission device and the two units, which are engaged with the transmission device on the input side and on the output side.
- the transmission device has at least one first and one second toothed wheel which are rotatable relative to one another and which engage with their teeth with transmission gears of one or the other unit.
- the tooth flanks of the first gear to the one tooth flanks of the assignable transfer gear applied, and the tooth flanks of the second gear are applied to the adjacent to the one tooth flanks counter flanks of this transfer gear.
- the biasing force of the biasing means By means of a frictional engagement between the first gear and the respective other gear can be maintained, the biasing force of the biasing means, wherein the achievable biasing force is greater, the greater the frictional force achieved by the frictional engagement.
- a transmission gear is provided for each of the output and the drive unit, one of which is in engagement with the first gear and the second gear and the second transmission gear with the first gear and a third gear is engaged.
- the arrangement can be made in this case so that the first gear between the second gear and the third gear is arranged coaxially thereto.
- the bias of the entire toothing is achieved by mutual rotation of the second and third gear relative to the middle first gear.
- the Reibsch lussucun between the first gear and the second gear and the third gear can hierbei be formed by jewei ls on a bearing cone on the second and on the third gear in conjunction with on to the middle first gear, which in reibsch lüssiger on Together, it is possible to transmit torque between these gears.
- Fig. 1 is a perspective oblique view of the embodiment of the processing device according to the invention.
- Fig. 2 is a central section of the embodiment
- Fig. 3 is a schematically simplified perspective drawn
- Fig. 4 is a side view of a separate dargestel Lten pinion
- Fig. 5 is a Thomasdarstel l the pinion unit according to the in
- the processing unit 2 has on a G-round body 4 which can be fixed to the tool disk, a gear housing 6, on which a tool holder 8 is über I type of construction, in which a relevant, not shown n display editing tool can be used.
- Aitl I of the tool holder 8 arranged pipe 1 0 is used to supply cutting oil ordeschm ierstoff to the processing area.
- the other end of the output shaft 14, which is likewise mounted with a roller bearing 20, is fixedly connected to a crown wheel 22 which part of the transmission device.
- the inventorswel le 1 2 of the output unit has on the insertable in d the recording of the tool disc not shown useful end a coupling ungstei l 24, which comes ungeseingriff in the inserted position m it with the inner drive of the tool disk in the clutch.
- a spur gear 26 which, like the crown gear 22 of the output shaft 14, transmits a transmission gear of the transmission device bi.
- the input shaft 12 is supported by a roller bearing unit 28.
- a designated as a whole with 30 pinion unit is provided, which is rotatably supported by means of bearings 32 and 34 with the input shaft 12 parallel to the output shaft 14 perpendicularly extending axis of rotation.
- the pinion unit 30 is formed of three gears in the form of spur gears, the first gear 36 is located as a middle gear between a second gear 38 and a third gear 40.
- the toothed wheels 36, 38 and 40 are formed concentrically to the axis of rotation 42 (FIG.
- Second gear 38 and third gear 40 each have a shaft journal 44 and 46 as a seat for the rolling bearings 34 and 32, respectively.
- the pinion unit 30 is located relative to the spur gear 26 forming the first transfer gear and to the crown gear 22 forming the second transfer gear in such an axial position that the spur gear 26 with its teeth 48 (only a few in FIG Fig. 3 figured) only with the teeth of the first gear 36 and with the teeth of the second gear 38 is engaged.
- the crown wheel 22 is with its teeth 50 (only a few of which are numbered in Fig. 3) only with the teeth of the first gear 36 and the third gear 40 in engagement.
- the gears 36, 38 and 40 are rotatable relative to each other, but by a producible between them frictional connection against mutual rotation can be ensured.
- the pinion unit 30 forms a biasing means by means of which the transmission device can be prestressed such that the torque transmission from the output unit 12 to the drive unit 14, i. from the spur gear 26, which forms the first transmission gear, to the crown wheel 22, which forms the second transmission gear, takes place without play.
- the procedure is such that the second gear 38 is rotated relative to the middle, first gear 36 such that the teeth of the first gear 36 abuts the one edge of the teeth 48 of the spur gear 26, while the teeth of the second gear 38 at the respective adjacent counter-flank of the teeth 48 of the spur gear 26 abuts.
- second gear 38 and third gear 40 are further rotated in opposite directions, wherein in the inner tubes 52 with the respective contact cone 54 connecting portion 64, see Fig. 5, a torsional stress is generated, the the prestressing force of the flank system forms.
- the flanks of the teeth 48 rest on one side both with the teeth of the first gear 36 and the teeth 38 under the bias and both flanks of the teeth 50 of the crown gear 22 as the second transfer gear simultaneously both tooth flanks of the teeth of the first gear 36 and third gear 40 are biased into engagement, the entire gear train of the transmission device between the input shaft 12 and output shaft 14 is free of play.
- the middle bias is preferably seen in the direction of FIG. 4, the middle
- Gear 36 is rotated to the left and the two outer gears 38 and 40 in the other, so far opposite right direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gear Transmission (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017008360.6A DE102017008360A1 (en) | 2017-09-06 | 2017-09-06 | Device for processing workpieces |
PCT/EP2018/073446 WO2019048348A1 (en) | 2017-09-06 | 2018-08-31 | Device for machining workpieces |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3678814A1 true EP3678814A1 (en) | 2020-07-15 |
Family
ID=63524254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18765830.7A Pending EP3678814A1 (en) | 2017-09-06 | 2018-08-31 | Device for machining workpieces |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3678814A1 (en) |
DE (1) | DE102017008360A1 (en) |
WO (1) | WO2019048348A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016118766A1 (en) * | 2016-10-04 | 2018-04-05 | Wto Vermögensverwaltung Gmbh | Drilling-milling device with a device for equalizing the torque and speed of the spindle |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2567229B1 (en) * | 1984-07-05 | 1990-02-02 | James Damas | METHOD AND DEVICE FOR THE AUTOMATIC RETRACTION OF GAMES IN GEAR SYSTEMS |
DD282190A5 (en) * | 1989-03-13 | 1990-09-05 | Zahnschneidemaschinen Fabrik M | HIGH-PERFORMANCE UNIVERSAL FRONT HEAD FOR CNC GEAR MILLING MACHINES |
DE4331042A1 (en) * | 1993-09-13 | 1995-03-16 | Liebherr Verzahntech Gmbh | Backlash-free rotary table drive of a machine tool |
US5870928A (en) * | 1997-05-08 | 1999-02-16 | Cummins Engine Company, Inc. | Anti-lash gear with alignment device |
DE102007006470A1 (en) * | 2007-02-09 | 2008-01-10 | Audi Ag | Gearwheel is made up of two sections, one of which is fixed to shaft (32) while other rotates freely on it, sections being connected by spiral coupling allowing them to rotate with respect to each other, compensating for thermal expansion |
DE202015008987U1 (en) * | 2014-08-08 | 2016-05-24 | M.T. S.R.L. | Wälzschälmodul |
-
2017
- 2017-09-06 DE DE102017008360.6A patent/DE102017008360A1/en not_active Withdrawn
-
2018
- 2018-08-31 WO PCT/EP2018/073446 patent/WO2019048348A1/en unknown
- 2018-08-31 EP EP18765830.7A patent/EP3678814A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102017008360A1 (en) | 2019-03-07 |
WO2019048348A1 (en) | 2019-03-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
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17P | Request for examination filed |
Effective date: 20200406 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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AX | Request for extension of the european patent |
Extension state: BA ME |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
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17Q | First examination report despatched |
Effective date: 20210819 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ZEITFRACHT GMBH & CO. KGAA |