EP4168691A1 - Getriebe für einen walzwerksantrieb, walzwerksantrieb mit einem getriebe sowie die verwendung des getriebes als walzwerksgetriebe - Google Patents
Getriebe für einen walzwerksantrieb, walzwerksantrieb mit einem getriebe sowie die verwendung des getriebes als walzwerksgetriebeInfo
- Publication number
- EP4168691A1 EP4168691A1 EP21734093.4A EP21734093A EP4168691A1 EP 4168691 A1 EP4168691 A1 EP 4168691A1 EP 21734093 A EP21734093 A EP 21734093A EP 4168691 A1 EP4168691 A1 EP 4168691A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling mill
- tooth
- gear mechanism
- gears
- gear
- 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
- 238000005096 rolling process Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000011160 research Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000011835 investigation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- F16H55/08—Profiling
-
- 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
- F16H55/08—Profiling
- F16H2055/0893—Profiling for parallel shaft arrangement of toothed members
Definitions
- Gear for a rolling mill drive rolling mill drive with a gear and the use of the gear as a rolling mill gear.
- the invention relates to a gear for a rolling mill drive, a rolling mill drive with a gear and the use of the gear as a rolling mill gear.
- asymmetrical toothing It is basically known in the prior art to provide transmissions with asymmetrical toothing.
- the principle of asymmetrical toothing is based on different flank pressure angles of each tooth of the toothing. This measure is intended to increase the load-bearing capacity and smoothness of the transmission. Due to a targeted increase in the pressure angle of the tooth flanks on the tensile side of the tooth, the tooth root stresses and Hertz ' occurring on this side are seen Reduced pressures. This contact tension between the mutually engaged tooth flanks is dependent on the tooth curvature radii of the respective tooth flanks.
- the invention is based on the object of providing a transmission for a rolling mill drive which is improved in terms of smoothness and load-bearing capacity compared to the transmissions according to the prior art. In particular, a significant increase in the load-bearing capacity of the transmission is to be achieved.
- the object is achieved by a transmission with the features of claim 1, by a rolling mill drive with the features of claim 7 and by the use of the transmission according to claim 8.
- a gear for a rolling mill drive which has at least one involute Spur gear teeth between at least two meshing gears with asymmetrical teeth, the normal pressure angle a n of the load-bearing tooth flanks of the gears greater than 20 ° and less than or equal to 30 ° and the normal pressure angle a n of the back flanks of the gears greater than or equal to 14 ° and less than 22 ° is.
- the load-bearing flank of the gears which is also referred to below as the working flank, is the flank that leads the tooth of the driving gear in the direction of rotation and is under tensile stress
- the back flank of the tooth is the flank that is on the driving gear in the direction of rotation of the gear lags behind and which is under compressive stress.
- the load-bearing flank of the tooth is that flank which is in engagement with the load-bearing flank of the tooth of the driving gear, that is to say which faces it. This tooth flank is under tensile stress when engaged.
- the inventors of the present application have defined special geometric influencing parameters that were used to optimize an asymmetrical toothing profile specifically for use in rolling mill gears.
- the target value ranges of the optimization profile are defined by the following eight inequalities:
- the target areas ensure compliance with the profile overlap, compliance with the minimum tooth tip thickness and compliance with the minimum tip clearance. Furthermore, compliance with the asymmetrical tooth profile is required and the generation of interference problems is excluded. With these specifications, the asymmetrical tooth profile is optimally adapted to the load situation in continuously operated rolling mill drive trains.
- the tooth gap profile have an elliptical tooth root rounding. An elliptical transition between the involute of the tooth flanks and the tooth root area results in a further significant increase in the tooth root load-bearing capacity.
- the normal pressure angle a n of the load-bearing tooth flanks is between 25 ° and 28 ° and the normal pressure angle a n of the rear flanks is between 18 ° and 22 °. It is furthermore advantageous and expedient if the head height factor of the reference profile of the load-bearing tooth flanks of the gearwheels is between 1 and 1.2. The head height factor of the reference profile gives the tooth head height in millimeters as a factor of the normal module.
- the root height factor of the reference profile of the gears is between 1.2 and 1.4.
- the root height factor of the reference profile multiplied by the normal module of the toothing results in the height of the tooth root in millimeters.
- the normal module of the gears is expediently between 16 and 40 mm.
- Another aspect of the invention relates to a rolling mill drive with a transmission with at least one of the features described above.
- the invention relates to the use of a transmission with one or more of the features described above as a rolling mill transmission.
- Figure 1 a is a schematic representation of the tooth profile shapes of a symmetrical and an asymmetrical toothing
- FIG. 1b shows a schematic representation of the loading behavior of intermeshing teeth of an asymmetrical toothing, with the tensile stress at point A of tooth 2 in the upper representation and the Compressive stress is shown at the same point A,
- Figure 1c compares the differences between the tooth stress according to known theoretical calculation bases and the actual stress behavior according to the inventors of this application carried out their own investigations
- Figure 2 is a schematic representation of an involute spur gear between two meshing gears of a transmission of a rolling mill drive
- Figure 3 is a schematic representation of two in engagement
- FIG. 4 shows a schematic representation of the elliptical tooth root rounding of the load-bearing tooth flank of a tooth profile according to the invention.
- FIG. 1a shows schematically the profile of an individual tooth 2 of a gearwheel 3, the left illustration in FIG. 1a showing a symmetrical tooth profile and the right illustration in FIG. 1a showing an asymmetrical tooth profile.
- the left tooth flank is referred to below as the rear flank 4, while the right tooth flank is referred to as the load-bearing tooth flank 5.
- FIGS. 1b and 1c An analysis of the draft standard for the geometry and load-bearing capacity of asymmetrical gears presented in research project number 2141 X by the inventors has shown that the research results known so far do not adequately reflect the actual stress behavior of the tooth flanks.
- FIGS. 1b and 1c Both representations illustrate mutually engaged gears 3 and, in thin lines, the stress curve of the mutually engaged tooth flanks of teeth 1, 2. In the upper illustration, the tensile stress on tooth 2 at point A is considered, whereas in the lower illustration the compressive stress on the tooth at point A.
- the graph on the left shows the theoretical course of stress resulting from the draft standard calculation according to the research project, whereas the graph on the right compares the equivalent stress according to the Mises hypothesis and the actually determined stress behavior of the tooth flanks.
- the actual stress behavior is shown with the lighter graph.
- the maximum of the compressive stress at point A according to the lower representation in FIG. 1b and the maximum of the tensile stress at point A according to the upper representation 1b correspond to the actually occurring stresses according to the investigations on which the invention is based. It follows from this that the exclusive consideration of the maximum of the Mises stress (left graph in FIG. 1c) is not a sufficient criterion for assessing strength.
- FIG. 3 shows an inventive involute spur gear toothing of two meshing gears 3, the gear 3 shown at the top in FIG. 3 being the driving gear and the gear shown at the bottom in FIG. 3 being the driven gear.
- the normal pressure angle a n of the load-bearing tooth flanks 5 of the driving gear is 26 ° in this exemplary embodiment, whereas the normal pressure angle a n of the rear flank 4 of this gear wheel is 18 °.
- a geometry Among other things, it has proven to be particularly advantageous on an asymmetrical involute spur gear toothing of a gear 6 for a rolling mill drive.
- Such a transmission 6 as a large transmission with a normal module m between 16 and 40 mm is shown in FIG.
- an increase in torque of at least 12% can be achieved.
- FIG. 7 An advantageous embodiment of the tooth root rounding 7 is shown in FIG. In this way, a further increase in the tooth root load-bearing capacity can be achieved.
- the tooth profile is provided with an elliptical transition between the involute and the tooth root area.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Gears, Cams (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020207477 | 2020-06-17 | ||
| DE102021206054.4A DE102021206054A1 (de) | 2020-06-17 | 2021-06-15 | Getriebe für einen Walzwerksantrieb, Walzwerksantrieb mit einem Getriebe sowie die Verwendung des Getriebes als Walzwerksgetriebe |
| PCT/EP2021/066170 WO2021255059A1 (de) | 2020-06-17 | 2021-06-16 | Getriebe für einen walzwerksantrieb, walzwerksantrieb mit einem getriebe sowie die verwendung des getriebes als walzwerksgetriebe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4168691A1 true EP4168691A1 (de) | 2023-04-26 |
Family
ID=78823321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21734093.4A Pending EP4168691A1 (de) | 2020-06-17 | 2021-06-16 | Getriebe für einen walzwerksantrieb, walzwerksantrieb mit einem getriebe sowie die verwendung des getriebes als walzwerksgetriebe |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12140215B2 (de) |
| EP (1) | EP4168691A1 (de) |
| JP (1) | JP7429311B2 (de) |
| CN (1) | CN115769001A (de) |
| DE (1) | DE102021206054A1 (de) |
| WO (1) | WO2021255059A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024199830A1 (de) | 2023-03-27 | 2024-10-03 | Sew-Eurodrive Gmbh & Co. Kg | Getriebemotor mit getriebe, das zumindest eine erste planetengetriebestufe aufweist |
| DE102024104273A1 (de) * | 2024-02-15 | 2025-08-21 | Bayerische Motoren Werke Aktiengesellschaft | Verzahnung für BEV-Getriebe |
| CN118133631B (zh) * | 2024-04-07 | 2024-08-30 | 东莞市星火齿轮有限公司 | 一种基于金属蜗杆与塑料齿轮传动的非对称齿轮设计方法 |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1144137A (en) * | 1914-10-14 | 1915-06-22 | Julian Kennedy | Gear. |
| DE2446172A1 (de) | 1974-09-27 | 1976-04-15 | Daimler Benz Ag | Evolventen-stirnradverzahnung |
| SU1020171A1 (ru) * | 1982-02-09 | 1983-05-30 | Всесоюзный научно-исследовательский институт метизной промышленности | Составной прокатный валок |
| US4643654A (en) * | 1985-09-12 | 1987-02-17 | American Standard Inc. | Screw rotor profile and method for generating |
| US4651588A (en) * | 1986-03-03 | 1987-03-24 | Rouverol William S | Low-excitation gearing |
| DE4138913C1 (de) * | 1991-11-27 | 1993-06-09 | John S. Barnes Gmbh, 8670 Hof, De | |
| WO2006027096A1 (de) * | 2004-09-03 | 2006-03-16 | Leistritz Ag | Extruderschnecke, extruder sowie welle-nabe-verbindung |
| DE102006015521B3 (de) | 2006-03-31 | 2007-04-12 | ThyssenKrupp Präzisionsschmiede GmbH | Verzahnung eines evolventisch wälzverzahnten Zahnrades |
| CN201269285Y (zh) * | 2008-08-26 | 2009-07-08 | 比亚迪股份有限公司 | 一种平动齿轮传动机构 |
| DE102010021771A1 (de) * | 2010-05-27 | 2011-12-01 | Schottel Gmbh | Kegelzahnrad eines Kegelgetriebes |
| US10190642B2 (en) * | 2011-06-24 | 2019-01-29 | Sms Siemag Ag | Toothing for operation at a deflection angle and production method |
| EP2551550B1 (de) * | 2011-07-29 | 2014-04-30 | AGUSTAWESTLAND S.p.A. | Planetengetriebe und entsprechendes Herstellungsverfahren |
| CN102570710A (zh) * | 2011-12-26 | 2012-07-11 | 余姚市兰山电机企业有限公司 | 一种立式减速直流永磁电动机 |
| DE102012203177A1 (de) | 2012-03-01 | 2013-09-05 | Zf Friedrichshafen Ag | Zahnradsatz, insbesondere für ein Drehflügelflugzeug |
| JP5575213B2 (ja) * | 2012-12-06 | 2014-08-20 | 三菱日立製鉄機械株式会社 | ギヤスピンドルおよびそれを備えた圧延機 |
| DE102013216240A1 (de) | 2013-08-15 | 2015-02-19 | Zf Friedrichshafen Ag | Schaltverzahnung für ein Fahrzeuggetriebe und Stufenautomatikgetriebe in Planetenradsatzbauweise |
| CN108694297A (zh) * | 2014-10-22 | 2018-10-23 | 江苏理工学院 | 基于显式动力学分析的非对称圆柱直齿轮副的建模方法 |
| DE102015122813A1 (de) | 2015-12-23 | 2017-06-29 | Rolls-Royce Deutschland Ltd & Co Kg | Planetengetriebevorrichtung und Strahltriebwerk mit einer Planetengetriebevorrichtung |
| JP6788968B2 (ja) | 2015-12-28 | 2020-11-25 | 株式会社シマノ | 歯車およびこれを備える自転車用変速機構 |
-
2021
- 2021-06-15 DE DE102021206054.4A patent/DE102021206054A1/de active Pending
- 2021-06-16 CN CN202180043376.9A patent/CN115769001A/zh active Pending
- 2021-06-16 JP JP2022577505A patent/JP7429311B2/ja active Active
- 2021-06-16 US US18/011,118 patent/US12140215B2/en active Active
- 2021-06-16 WO PCT/EP2021/066170 patent/WO2021255059A1/de not_active Ceased
- 2021-06-16 EP EP21734093.4A patent/EP4168691A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP7429311B2 (ja) | 2024-02-07 |
| US20230272847A1 (en) | 2023-08-31 |
| CN115769001A (zh) | 2023-03-07 |
| DE102021206054A1 (de) | 2021-12-23 |
| US12140215B2 (en) | 2024-11-12 |
| WO2021255059A1 (de) | 2021-12-23 |
| JP2023530714A (ja) | 2023-07-19 |
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