US3386213A - Method for grinding tooth flanks of toothed gear wheels - Google Patents

Method for grinding tooth flanks of toothed gear wheels Download PDF

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Publication number
US3386213A
US3386213A US543732A US54373266A US3386213A US 3386213 A US3386213 A US 3386213A US 543732 A US543732 A US 543732A US 54373266 A US54373266 A US 54373266A US 3386213 A US3386213 A US 3386213A
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United States
Prior art keywords
grinding
tooth
grinding wheel
wheel
face
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Expired - Lifetime
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US543732A
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English (en)
Inventor
Alwin G Hauser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maag Gear Wheel and Machine Co Ltd
Maag Zahnrader und Maschinen AG
Original Assignee
Maag Zahnrader und Maschinen AG
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Classifications

    • 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
    • B23F5/06—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 the tool being a grinding disc with a plane front surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23F—MAKING GEARS OR TOOTHED RACKS
    • B23F21/00—Tools specially adapted for use in machines for manufacturing gear teeth
    • B23F21/02—Grinding discs; Grinding worms

Definitions

  • This invention relates to a method for grinding the flanks of gear teeth with a dished grinding wheel having an endface with a slight hollow-tapered shape, that is to say, with a shallow internal taper on the side facing the tooth flank, so that in theory a point of the grinding wheel edge, formed by the face of the shallow internal taper and the face of the rim of the grinding wheel, generates the tooth flanks.
  • a point of the grinding wheel edge formed by the face of the shallow internal taper and the face of the rim of the grinding wheel, generates the tooth flanks.
  • only one point of the said grinding wheel edge determines the final shape of the tooth flank, but in practice it is a small zone of the edge, and the diameter of the grinding wheel is selected at a somewhat greater value with reference to the abovementioned theoretical point.
  • a method has become known under the name zerodegree grinding in which two dished grinding wheels machine the tooth flanks, one grinding wheel operating on the left-hand tooth flank and the other grinding wheel operating on the right-hand tooth flank, while the two grinding wheel axes are located at an angle of 0 in relation to each other, that is to say, they are located in parallel to each other, and the gear wheel to be ground rolls on its base circle.
  • the grinding method in accordance with the invention eliminates these disadvantages and at the same time increases the grinding performance without impairing the accuracy of the generated tooth flanks.
  • the method of grinding the tooth flank of a toothed gear wheel by means of a dished grinding wheel having that end face which faces the tooth flank tapered inwardly from the periphery of the grinding wheel to provide a shallow dish, and in which the tooth flank theoretically is ground by a point in the edge of the r grinding wheel formed by the junction of the face of said shallow dish and the face of the grinding Wheel rim, is characterised in that the grinding wheel is in-fed towards the tooth flank by an amount substantially equal to the full grinding allowance left on completion of cutting of the gear wheel, is reciprocated along the width of the tooth flank in the general direction of the toothed gear wheel axis, and is reciprocated between the tooth tip and the tooth root, so that the removal of the grinding allowance is carried out substantially by the face of the grinding wheel rim.
  • the main wear of the dished grinding wheel therefore takes plac on the cylindrical or tapered rim whose diameter is, however, of little significance for the accuracy of the tooth flanks.
  • the axial elastic deformation of the grinding wheels is practically zero, an
  • a further advantage is due to the fact thatv at least a substantial part of the grinding allowance is machined away in one operation in the direction from the tooth tip to the tooth root, while the return motion in the direction from the tooth root to the tooth tip merely results in finishing of the tooth flank.
  • the method of the invention ensure that a relatively large number of grinding grit particles on the circumference of the grinding wheel, the majority of which are widely spaced, carry out the machining work, so that localised heat accumulations remain small and rapid heat dissipation or a favourable heat distribution is achieved.
  • FIG. 1 is a cross-section of part of a grinding wheel and a tooth flank, illustrating a prior art grinding method
  • FIG. 2 is an elevation, looking in the direction of the arrow A in FIG. 1;
  • FIG. 3 is a cross-section of part of a grinding wheel and part of a tooth flank, illustrating the method according to the present invention
  • FIG. 4 is a diagram illustrating the force components indicated in FIG. 3 and acting on the grinding wheel
  • FIG. 5 is a similar view to FIG. 3, but showing a modifled grinding wheel edge
  • FIG. 6 is a diagram illustrating the force components indicated in FIG. 5 and acting on the grinding wheel
  • FIG. 7 is an elevation of the tooth flank and the grinding wheel, looking generally in the direction of the arrow B in FIG. 3 and on a smaller scale, and illustrating a zigzag track of the grinding wheel on the tooth flank;
  • FIG. 8 is a similar view to FIG. 7, but illustrating a track formed by step-by-step movement of the grinding wheel along the tooth profile;
  • FIG. 9 is a perspective view showing the engagement of the grinding wheel on the tooth flank.
  • FIG. 1 shows a cross-section through a dished grinding wheel (having the diameter d and through the tooth flank of a tooth 2 which is to be ground.
  • the axis of the grinding wheel 1 is stationary and the gear wheel with the tooth 2 rolls along the point 4 of the dished grinding wheel, or the tooth flank moves, in the direction of the arrow 5, along the point 4 while the tooth profile is generated owing to the wheel rolling on the base circle.
  • the point 4 is a point on the grinding wheel edge which is formed at the junction of the internally tapered face 1a which provides the shallow dishing of the grinding wheel and the face 1b of the rim of the grinding wheel 1.
  • a frequently employed track of the grinding wheel point 4 on the tooth flank which is to be ground is shown in FIG. 2 in the form of a zigzag dot-dash line 8. It is particularly the zone 7, shown in FIG. 2, of the shallow internally tapered face 1a of the dished grinding wheel 1 which grinds away the material, because with the small feeds of the grinding wheel in the prior art methods there is a deformation of the dished grinding wheel which has a detrimental effect on the accuracy, and in particular in the grinding performance, and which may also necessitate running out grinding without applying a feed.
  • the grinding stress of the internal taper (as a component in the axial plane of the grinding wheel) produces a grinding force R6, acting in the direction of the arrow, where this grinding force may act substantially in parallel to the grinding wheel axis and may be located in the centre of gravity of the zone 7.
  • FIGS. 3 to 9 The grinding method in accordance with the present invention is illustrated in FIGS. 3 to 9 by way of example.
  • FIG. 3 shows a greatly enlarged section through a dished grinding wheel 11 and the tooth flank of a tooth 2 which is to be ground.
  • the point 14 moves along the tooth profile of the tooth 2, the point 14 being a point on the circular and effective sharp edge of the grinding wheel formed by the face 11a of the shallow internal taper and the face 11b of the cylindrical rim of the dished grinding wheel 11.
  • the rim face 11b of the wheel 11 engages the tooth 2 along the entire width 11 of the grinding allowance, the cutting forces F to P (as components in the plane through the grinding wheel axis) being required to move the grinding wheel in the direction of the arrow along the profile.
  • the resultant force is R (FIG.
  • the point 24 follows 'a track of the shape shown in FIG. 8.
  • the solid line 32 represents the motion of the wheel 21 from tooth tip to tooth root
  • the broken line 33 representing the motion in the direction from tooth root to tooth tip.
  • two grinding wheels take part in the machining process, one grinding wheel machining all lefthand tooth flanks and the other wheel machining all righthand' tooth flanks.
  • a relatively large number of grinding grit particles therefore carry out machining work, the aforementioned grinding grit particles being widely spaced from each other if the grinding wheel is suitably selected for the purpose. This will minimize localised heat accumulations and ensure rapid heat dissipation or a favourable heat distribution.
  • the position of the grinding wheel edge plane (FIG. 3 point 14, also FIG. 5 point 24) in relation to the tangential plane of the radius of curvature of the affected profile section may be 0 but may also be some positive or negative angle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
US543732A 1965-04-23 1966-04-19 Method for grinding tooth flanks of toothed gear wheels Expired - Lifetime US3386213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM64990A DE1223664B (de) 1965-04-23 1965-04-23 Tellerschleifscheibe zum Schleifen von Zahnflanken

Publications (1)

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US3386213A true US3386213A (en) 1968-06-04

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US543732A Expired - Lifetime US3386213A (en) 1965-04-23 1966-04-19 Method for grinding tooth flanks of toothed gear wheels

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US (1) US3386213A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH458884A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1223664B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1119113A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6605378A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE324688B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916569A (en) * 1973-03-26 1975-11-04 Maag Zahnraeder & Maschinen Ag Methods of and means for producing helically toothed gears
US4400916A (en) * 1979-06-20 1983-08-30 Maag Gear-Wheel & Machine Company Limited Indexing generating method for grinding gears
WO2010069554A1 (de) * 2008-12-19 2010-06-24 Voith Patent Gmbh Werkzeug maschine und verfahren zur herstellung von verzahnungen
US20120208436A1 (en) * 2009-10-22 2012-08-16 Mueller Hartmuth Method for Hard Fine Machining of the Tooth Flanks of a Gear Wheel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2641554C3 (de) * 1976-09-15 1981-06-25 Maag-Zahnräder & -Maschinen AG, 8023 Zürich Vorrichtung zum Wälzschleifen zylindrischer Zahnräder
DE3734828C1 (de) * 1987-10-14 1989-01-12 Hurth Masch Zahnrad Carl Verfahren zum Teilwaelzschleifen von Zahnraedern sowie eine dafuer geeignete Maschine
RU2147268C1 (ru) * 1999-03-05 2000-04-10 Орловский государственный технический университет Прерывистый шлифовальный круг для обработки колес с круговым зубом

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1642708A (en) * 1922-06-13 1927-09-20 Int Motor Co Grinding wheel and method of grinding
US1773677A (en) * 1925-09-18 1930-08-19 Herrmann Richard Machine for the production of the faces of teeth of gear wheels
US1964233A (en) * 1931-02-28 1934-06-26 Niles Werke Ag Deutsche Method of grinding straight and helical teeth on spur wheels

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1642708A (en) * 1922-06-13 1927-09-20 Int Motor Co Grinding wheel and method of grinding
US1773677A (en) * 1925-09-18 1930-08-19 Herrmann Richard Machine for the production of the faces of teeth of gear wheels
US1964233A (en) * 1931-02-28 1934-06-26 Niles Werke Ag Deutsche Method of grinding straight and helical teeth on spur wheels

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916569A (en) * 1973-03-26 1975-11-04 Maag Zahnraeder & Maschinen Ag Methods of and means for producing helically toothed gears
US4400916A (en) * 1979-06-20 1983-08-30 Maag Gear-Wheel & Machine Company Limited Indexing generating method for grinding gears
WO2010069554A1 (de) * 2008-12-19 2010-06-24 Voith Patent Gmbh Werkzeug maschine und verfahren zur herstellung von verzahnungen
CN102256735A (zh) * 2008-12-19 2011-11-23 沃依特专利有限责任公司 用于制造齿部的机床和方法
CN102256735B (zh) * 2008-12-19 2015-02-25 沃依特专利有限责任公司 用于制造齿部的机床和方法
US20120208436A1 (en) * 2009-10-22 2012-08-16 Mueller Hartmuth Method for Hard Fine Machining of the Tooth Flanks of a Gear Wheel
US8961268B2 (en) * 2009-10-22 2015-02-24 Klingelnberg Ag Method for hard fine machining of the tooth flanks of a gear wheel

Also Published As

Publication number Publication date
NL6605378A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1966-10-24
GB1119113A (en) 1968-07-10
SE324688B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-06-08
CH458884A (de) 1968-06-30
DE1223664B (de) 1966-08-25

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