WO2018130260A1 - Verfahren zur hartfeinbearbeitung von verzahnungen, insbesondere innenverzahnungen und dazu geeignete werkzeugmaschine - Google Patents
Verfahren zur hartfeinbearbeitung von verzahnungen, insbesondere innenverzahnungen und dazu geeignete werkzeugmaschine Download PDFInfo
- Publication number
- WO2018130260A1 WO2018130260A1 PCT/EP2017/001358 EP2017001358W WO2018130260A1 WO 2018130260 A1 WO2018130260 A1 WO 2018130260A1 EP 2017001358 W EP2017001358 W EP 2017001358W WO 2018130260 A1 WO2018130260 A1 WO 2018130260A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tooth
- tool
- machined
- tooth thickness
- axis
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F19/00—Finishing gear teeth by other tools than those used for manufacturing gear teeth
- B23F19/10—Chamfering the end edges of gear teeth
- B23F19/12—Chamfering the end edges of gear teeth by grinding
- B23F19/125—Chamfering the end edges of gear teeth by grinding the tool being a grinding worm
-
- 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
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F19/00—Finishing gear teeth by other tools than those used for manufacturing gear teeth
-
- 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
- B23F5/02—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 grinding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/009—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding profiled workpieces using a profiled grinding tool
Definitions
- the invention relates to a method for hard fine machining of gears, in particular internal gears, and a toothing machine designed for this purpose.
- gears are brought after hardening by hard finishing in their predetermined target final geometry.
- any remaining allowance is removed by an abrasive machining operation, e.g. through a grinding process.
- the profile grinding or the generating grinding are known as known methods.
- EP 3 034 220 A1 et al. to DE 10 2010 021 749 A1 as a known method for grinding of internal teeth, as well as to WO 2014/192672 A1.
- a removal is to be ground by continuous relative movement of the teeth of grinding tool in the interstices of the toothing of the workpiece, wherein the speed of the relative movement is greater than during skiving and / or greater than 300 m / min, in particular greater than 400 m / min, in particular greater than 500 m / min should be.
- grinding tools can be designed as a spur gear, the tooth tip diameter and the Zahnfuß devisr can decrease over the tooth width to realize clearance angle, which could alternatively be achieved by adjusting the axes of rotation relative to each other.
- the invention has for its object to further improve a hard fine machining process of the type mentioned, in particular with a view to a longer life of the hard finishing tool.
- This object is achieved in procedural terms by a process for hard fine machining of gears, in particular internal gears, which is characterized essentially in that one toothed, rotating around its axis of rotation Hartfeinbearbeitungswerkmaschine in one pass or in several passes different radial feed depth under a feed motion with a to the axis of rotation of the machined toothing parallel direction component and brings under a non-zero axis cross angle in rolling machining engagement with the machined teeth and with a tooth flank portion of the tool toothing with the machined tooth facing end side in the flank line direction increasing tooth thickness material from the machined toothing ablates.
- the tooth flank region of increasing tooth thickness at least at the beginning of a portion of increasing tooth height. This creates favorable geometric conditions for the machining operation.
- the feed depth is changed between two passes to an extent in which a half tooth thickness difference of the removing tooth flank area is not exceeded by more than 10% and which in particular is not greater than half the tooth thickness difference and / or not less than 40 %, in particular not less than 30% of the tooth thickness difference.
- the ratio of the tooth thickness difference of the length of the removing tooth flank region of increasing tooth thickness in the flank line direction is at least 1/200, preferably at least 1/150, more preferably at least 1/100 and in particular at most 1/20, preferably at most 1 / 30, in particular at most 1/40. This results in a favorable combination of tool life and the time required for hard finishing.
- the length of the removing tooth flank area of increasing tooth thickness in flank line direction is at least 1x m, preferably at least 2x m, more preferably at least 4x m and in particular at least 6x m, where m is the module of the tool toothing.
- a tooth flank area of constant or decreasing tooth thickness adjoins the tooth flank region in increasing tooth thickness in the tooth flank direction.
- a region of decreasing tooth thickness is formed in the feed direction behind the region of increasing tooth thickness, in particular on the opposite end face.
- a reduced feed depth change and / or feed rate is used in the last pass. This allows a smooth final pass without replacement of the grinding tool over a specially designed sizing tool.
- the method proves to be particularly suitable for tool toothing modules measured in [mm] of at least 0.4, preferably at least 0.7, in particular at least 1 and / or 8, preferably at most 6, in particular at most 4.
- an axis cross angle of at least 1 °, preferably at least 2 °, in particular at least 3 ° is particularly preferably provided, but this should preferably be at most 45 °, particularly preferably at most 22 °, in particular at most 18 °. In this way, suitable kinematic conditions for the machining operation are achieved.
- the speed of the workpiece is at least 40, preferably at least 400, in particular at least 800 U / min, and / or at most 7,000, preferably at most 5,600, in particular 4,800 U / min. This represents a good compromise for an acceptable high removal rate with reduced risk of grinding burns.
- the feed rate in mm per workpiece rotation in at least one, in particular multiple passes at most 0.2, preferably at most 0.15 and / or at least 0.01, preferably at least 0.02, more preferred at least 0.04 and in particular at least 0.06.
- the design of the tool surface may be uniform, however, in a preferred embodiment, the abrasive surface at least in a portion of the abrasive tooth flank region near the machined tooth facing end face designed as a lying behind the tooth flank area increasing tooth thickness section, in particular in the form of a near the processed Gearing facing end face coarser grain of a Abrasivbelages.
- the lining can be suitably adapted to the tool zones of different loads during the machining operation.
- the type of the shape of the rise with respect to the increase in the tooth thickness and / or the tip circle diameter is preferably spherical, in particular with the curvature decreasing from the end face facing the machined toothing over the flank line direction. This can produce favorable work results in terms of a combination of tool life and quality of hard finishing.
- the invention proposes a machine tool for hard fine machining of gears, with a rotatable clamping for a workpiece with a toothing provided for processing, in particular internal toothing, a rotationally driven clamping for a toothed Hartfeinbearbeitungstechnikzeug with moving axes for realizing a radial feed movement between the workpiece and tool for the feed movement with a direction of rotation of the machined toothing parallel direction component realizing relative movement between the workpiece and the tool, and a rotation axis for setting a non-zero axis cross angle between the tool and workpiece axis, and a control device which contains control instructions that the machine for Execution of a method according to one of the preceding method aspects controls.
- control program containing such control instructions is also disclosed as being capable of protection on its own.
- the invention proposes a hard fine machining tool provided with a toothing and rotatable about its axis of rotation, which has an abrasive tooth flank area with a tooth thickness increasing in the flank line area from an end face facing a toothing to be machined.
- the hard-finishing tion tool can also have one or more of the above explained with reference to the method claims features.
- FIG. 2 shows the tool and workpiece in a representation in which the plane of the paper is the normal plane of the common solder on the respective axes of rotation
- Fig. 5 shows in a simplified axial sectional view of the removal mechanism of the tool
- Fig. 6 shows schematically a gear machine construction.
- FIG. 1 an externally toothed tool W is shown in a perspective view in engagement with an internally toothed workpiece 2.
- the internal toothing 3 of the workpiece 2 is subjected by the toothing 4 of the tool W to a hard abrasive machining.
- the tool W in the exemplary embodiment is a CBN-coated helical tool, but other variants are conceivable, such as e.g. Spur gears and / or diamond coated wheels.
- the axes of rotation C of the workpiece 2 and B of the tool W are in a skewed position relative to one another and enclose an axis cross angle ⁇ , as can be seen better from FIG.
- the processing takes place in one or preferably several stages, each with a deeper radial feed and under a feed motion, which in this embodiment is parallel to the axis of rotation C of the workpiece 2 and is represented in the illustration in Fig. 1 by the arrow with reference numeral v.
- Fig. 3 in which the tool W is shown alone, the toothing 4 of the tool W is seen in the axial direction in three areas 4a, 4b, 4c different shape of its teeth divided.
- the tooth thickness of the toothing 4 increases from the forward end 5 with respect to the feed direction toward the other end face so as to be constant in a central region 4 b and to fall off again in the rear region 4 c.
- a similar course also takes the tip diameter, namely rising in the area 4a, 4b in the area constant and decreasing in the area 4c.
- FIG. 4 shows a view in which the progression of the tooth thickness in the areas 4a, 4b, 4c can be seen even better, for the sake of simpler representation of a tool W 'of straight teeth. Shown is a section through a tooth 44, in which the cut surface lies on the pitch circle. Also drawn in each case on the left and right flank of the half tooth thickness difference ⁇ / 2 between the area of least tooth thickness on the end face 5 to the transition between the area 4a and the area 4b.
- FIG. 4 a preferred type of increasing tooth thickness is shown in FIG. 4, namely in the form of a crown.
- the species could also be of a conical type or with different crowning gradients.
- the removal mechanism will now be explained with reference to the schematic drawing of FIG. 5.
- the region L on the left of the workpiece 2 stands for the toothing 3 of the workpiece 2 with an allowance, for example, of the desired final shape of the toothing 3 (or before the n-th hard finishing stage, when the schematically illustrated engagement of the tool W of the n-th passage the hard finishing is).
- the measurement situation is shown after the illustrated hard finishing pass (or the final state aimed at the hard finishing, if the illustrated pass is the last machining pass). It can be seen that the oversize-changing machining engagement is effected substantially by the area 4a of the workpiece W.
- the central region 4b has a smoothing effect primarily, and the machining contact is released in the rear region 4c (clearance section).
- the Abtrag Genevakeit of working as a coarse section section 4a increasing tooth width which can be regarded as a ramp, fully out, so corresponds to the half tooth thickness difference ⁇ / 2 in the selected Maschinenachsein ein (Achsnchwinkel ⁇ ) achievable Abrasion (ie measurement difference between before and after the respective hard finishing pass).
- the removal performance does not have to be borne by the tooth edge on the end face 5, but rather it is distributed over the length (in the tooth width direction) of the ramp, that is to say of the region 4a of increasing tooth thickness.
- FIG. 6 shows, on a schematic basis, a gear cutting machine 100 with the workpiece-side and tool-side machine axes on which the hard-machining method can be carried out.
- the internally toothed workpiece 2 is held in a suitable workpiece spindle 40 and can be driven rotatably about its axis of rotation C via a drive, not shown.
- the tool W is tool-tensioned on a workpiece spindle 50.
- the tool spindle 50 is arranged on a tangential slide 60 whose linear movement axis runs parallel to the axis of rotation B of the tool and which is arranged on a rotary support 80.
- the rotary carrier 80 is in turn mounted on a cross slide assembly 90.
- the axis of the cross axis ⁇ can be adjusted by rotation about the infeed axis X.
- the machine 100 includes a controller 99 which includes the machine axis motion control control commands necessary to control the method.
- This is CNC-controlled, preferably using direct drives for the machine axes, whereby indirect drives are conceivable.
- the reference numeral 22 is still a einschwenkbarer inmittsensor shown, with which the angular position of the internal teeth 3 of the clamped workpiece 2 can be determined in an Einmittoperation to synchronize the axes of rotation B, C for the in-phase rolling machining engagement between the tool W and workpiece 2.
- a radial return movement begins, in particular in the case of the last and deepest passages, even if the workpiece toothing has not yet undergone any reduction in the overall toothing width.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Processing (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201780081967.9A CN110121393B (zh) | 2017-01-12 | 2017-11-17 | 对内部齿形部分硬表面加工的方法和适合该方法的机床 |
KR1020197019121A KR102555108B1 (ko) | 2017-01-12 | 2017-11-17 | 치형이 있는 기어링, 특히 내측에 치형이 있는 부분들을 하드 가공하기 위한 방법 및 이에 적합한 기계 공구 |
BR112019013458A BR112019013458A2 (pt) | 2017-01-12 | 2017-11-17 | método para acabamento rígido de engrenagem dentada, particularmente, porções internamente dentadas e ferramenta de máquina adequada para o mesmo |
US16/474,749 US11097364B2 (en) | 2017-01-12 | 2017-11-17 | Method for hard finishing toothed gearing, particularly internally toothed portions and machine tool suitable therefor |
EP17800706.8A EP3568254B1 (de) | 2017-01-12 | 2017-11-17 | Verfahren zur hartfeinbearbeitung von verzahnungen, insbesondere innenverzahnungen und dazu geeignete werkzeugmaschine |
JP2019538252A JP7065101B2 (ja) | 2017-01-12 | 2017-11-17 | 歯付き歯車、特に内歯部分を硬仕上げするための方法およびそれに好適な機械工具 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017000260.6 | 2017-01-12 | ||
DE102017000260.6A DE102017000260A1 (de) | 2017-01-12 | 2017-01-12 | Verfahren zur hartfeinbearbeitung von verzahnungen, insbesondere innenverzahnungen und dazu geeignete werkzeugmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018130260A1 true WO2018130260A1 (de) | 2018-07-19 |
Family
ID=60387975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2017/001358 WO2018130260A1 (de) | 2017-01-12 | 2017-11-17 | Verfahren zur hartfeinbearbeitung von verzahnungen, insbesondere innenverzahnungen und dazu geeignete werkzeugmaschine |
Country Status (8)
Country | Link |
---|---|
US (1) | US11097364B2 (de) |
EP (1) | EP3568254B1 (de) |
JP (1) | JP7065101B2 (de) |
KR (1) | KR102555108B1 (de) |
CN (1) | CN110121393B (de) |
BR (1) | BR112019013458A2 (de) |
DE (1) | DE102017000260A1 (de) |
WO (1) | WO2018130260A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3838463A1 (de) | 2019-12-18 | 2021-06-23 | Präwema Antriebstechnik GmbH | Verfahren zum feinbearbeiten eines mit einer verzahnung versehenen werkstücks |
Families Citing this family (6)
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ITUB20154694A1 (it) * | 2015-10-15 | 2017-04-15 | Danfoss Power Solutions S R L | Utensile creatore rotante e procedimento per la generazione di ruote dentate con dentatura asimmetrica. |
DE102019126669A1 (de) * | 2019-10-02 | 2021-04-08 | Profilator Gmbh & Co. Kg | Verfahren und Vorrichtung zum Glätten der Zahnflanken der Zähne verzahnter Werkstücke |
DE102020111838A1 (de) * | 2020-04-30 | 2021-11-04 | Präwema Antriebstechnik GmbH | Verfahren zum Bearbeiten des Kopfkreisdurchmessers und Werkzeug zum Erzeugen eines Zahnrads |
KR102473551B1 (ko) | 2020-08-26 | 2022-12-01 | 홍관주 | 수치제어를 이용한 정밀 내치차 가공장치 |
KR102473553B1 (ko) | 2020-08-26 | 2022-12-01 | 홍관주 | 수치제어를 이용한 정밀 내치차 가공방법 |
DE102021000429A1 (de) * | 2021-01-28 | 2022-07-28 | Gleason Switzerland Ag | Verfahren des Honens einer Verzahnung an einem Werkstück |
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DE975164C (de) * | 1936-10-31 | 1961-09-07 | Fellows Gear Shaper Co | Verwendung eines Zahnrades mit konvex oder konkav gekruemmten Zahnflanken als Werkzeug zum Fertigbearbeiten eines anderen Zahnrades |
DE102010021749A1 (de) | 2010-05-28 | 2011-12-01 | Kapp Gmbh | Verfahren zum Schleifen der Außen- und/oder Innenverzahnung eines dünnwandigen Werkstücks |
EP2745970A1 (de) * | 2009-06-10 | 2014-06-25 | Profilator GmbH & Co. KG | Vorrichtung und Verfahren zum Wälzschälen von innenverzahnten Zahnrädern sowie zugehöriges Schälrad |
WO2014192672A1 (ja) | 2013-05-29 | 2014-12-04 | 三菱重工業株式会社 | 内歯車研削方法 |
EP3034220A1 (de) | 2014-12-16 | 2016-06-22 | Ovalo GmbH | Verfahren und vorrichtung zum schleifenden bearbeiten der verzahnung eines zahnrades |
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2017
- 2017-01-12 DE DE102017000260.6A patent/DE102017000260A1/de not_active Withdrawn
- 2017-11-17 KR KR1020197019121A patent/KR102555108B1/ko active IP Right Grant
- 2017-11-17 BR BR112019013458A patent/BR112019013458A2/pt not_active Application Discontinuation
- 2017-11-17 CN CN201780081967.9A patent/CN110121393B/zh active Active
- 2017-11-17 US US16/474,749 patent/US11097364B2/en active Active
- 2017-11-17 EP EP17800706.8A patent/EP3568254B1/de active Active
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3838463A1 (de) | 2019-12-18 | 2021-06-23 | Präwema Antriebstechnik GmbH | Verfahren zum feinbearbeiten eines mit einer verzahnung versehenen werkstücks |
DE102019134924A1 (de) * | 2019-12-18 | 2021-06-24 | Präwema Antriebstechnik GmbH | Verfahren zum feinbearbeiten eines mit einer verzahnung versehenen werkstücks |
US11819935B2 (en) | 2019-12-18 | 2023-11-21 | Präwema Antriebstechnik GmbH | Method for precision machining a workpiece provided with gearing |
Also Published As
Publication number | Publication date |
---|---|
CN110121393A (zh) | 2019-08-13 |
JP2020504023A (ja) | 2020-02-06 |
BR112019013458A2 (pt) | 2019-12-31 |
US11097364B2 (en) | 2021-08-24 |
KR20190107011A (ko) | 2019-09-18 |
JP7065101B2 (ja) | 2022-05-11 |
EP3568254B1 (de) | 2022-08-24 |
EP3568254A1 (de) | 2019-11-20 |
US20190321901A1 (en) | 2019-10-24 |
KR102555108B1 (ko) | 2023-07-14 |
CN110121393B (zh) | 2021-11-26 |
DE102017000260A1 (de) | 2018-07-12 |
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