CN104819266A - Arc spiral line mixed herringbone gear without tool withdrawal groove and processing method thereof - Google Patents
Arc spiral line mixed herringbone gear without tool withdrawal groove and processing method thereof Download PDFInfo
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- CN104819266A CN104819266A CN201510239606.5A CN201510239606A CN104819266A CN 104819266 A CN104819266 A CN 104819266A CN 201510239606 A CN201510239606 A CN 201510239606A CN 104819266 A CN104819266 A CN 104819266A
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- gear
- herringbone gear
- teeth
- herringbone
- tooth
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Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F7/00—Making herringbone gear teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
- B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- 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
-
- 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
- F16H2055/086—Silent gear profiles
Abstract
The invention discloses an arc spiral line mixed herringbone gear without tool withdrawal groove. The gear comprises a herringbone gear body, a plurality of herringbone gear wheel teeth are formed on the herringbone gear body, herringbone tooth groove is formed among herringbone gear wheel teeth, and the herringbone gear wheel teeth is orderly composed of a herringbone gear right rotating wheel tooth, a herringbone gear arc wheel tooth and a herringbone gear left rotating wheel tooth section; two sides of the herringbone gear wheel tooth are the herringbone gear wheel tooth concave tooth surface and the herringbone gear wheel tooth convex tooth surface; a processing method for arc spiral line mixed herringbone gear without tool withdrawal groove is also disclosed, the herringbone gear is characterized of being big in contact ratio, stable in meshing transmission, low in noise, big in bearing capability and compact in structure; the arc spiral line mixed herringbone gear without tool withdrawal groove is suitable for occasions such as ship power, airline mechanical transmission, overloaded vehicle engineering high overloading with close restraint on structure size of gear case.
Description
Technical field
The invention belongs to gearing field, be specifically related to a kind of without tool withdrawal groove arc spiral line hybrid type herringbone gear and teeth grinding method.
Background technique
Helical gear engagement contact enters engagement by one end of the gear teeth and exits engagement from the other end of the gear teeth, the length of its profile contact line increases gradually by zero, shortens gradually again, until the process disengaged, namely, when its flank profil front-end face departs from engagement, the ear end face of flank profil is still in engagement.Therefore, load is also the process of a gradual change along the change in facewidth direction.Simultaneously meshed gears logarithm is many for helical gear, and contact ratio is large, therefore Helical gear Transmission running comparatively steadily, strong, the noise of bearing capacity and impact less, to be applicable at a high speed, powerful gear transmission.When helical gear is applied to high-speed overload mechanical transmission, usually need the heat treatment of gear teeth carburization process, this process must cause the distortion of gear, therefore needs to gear grinding to correct the distortion in heat treatment process, to improve the fatigue behaviour of the accuracy of gear and gear.
By two, left and right rotation direction, the contrary and helical gear of symmetry forms herringbone gear, is a kind ofly to have left-handed and cylindrical gears that the is dextrorotation gear teeth simultaneously.Its structural feature is right-hand teeth and for left-hand teeth in another part facewidth in certain a part of facewidth of cylindrical gears.Herringbone gear transmission has that contact ratio is large, bearing capacity is high, stable drive and the advantage such as thrust load is little, is widely used in the transmission system of heavy machinery.
Herringbone gear can be divided into the centre shown in the herringbone gear without tool withdrawal groove shown in Fig. 1 and Fig. 2 to have herringbone gear two kinds of structural types of tool withdrawal groove (grinding wheel groove) according to its structural feature.The former is that the left and right sides gear teeth directly intersect a kind of structural type forming wedge angle in the middle of the facewidth without tool withdrawal groove herringbone gear, has transmission arrangments compact, machining accuracy advantages of higher.But this type gear must be processed by gear-shaping on special purpose machine tool, or left-handed and the parts processing manufacture of dextrorotation both sides is then combined, and the herringbone gear of current this structure cannot realize roll flute due to the wedge angle between the left-right rotary gear teeth.Centre has the herringbone gear of tool withdrawal groove to be made of one both sides, but between effective gear teeth of both sides, leave necessary tool withdrawal groove (grinding wheel groove).Such gear just can realize the roll flute processing of gear without the need to specialized working machine tool of machine, has that cost is low, manufacturing efficiency advantages of higher.Due to need grinding wheel groove be stayed, so when gear overall width is restricted, the facewidth participating in work reduces, and reduces gear capacity.
Therefore, current gear manufacturing technology, leaves the herringbone gear of grinding wheel groove, can realize gear teeth grinding fine finishing, be suitable for the occasion of high-speed overload herringbone gear transmission, as ship power, aviation machine transmission, heavy-duty vehicle engineering etc.Without the gear of grinding wheel groove, can not roll flute fine finishing be carried out, limit its application under the condition of high-speed overload.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of without tool withdrawal groove arc spiral line hybrid type herringbone gear and processing method thereof.
For achieving the above object, technological scheme of the present invention is achieved in that
The embodiment of the present invention provides a kind of without tool withdrawal groove arc spiral line hybrid type herringbone gear, this gear comprises herringbone gear wheel body, described herringbone gear wheel body is processed with several herringbone gear gear teeth, herringbone gear teeth groove is offered between several herringbone gear gear teeth described, the described herringbone gear gear teeth are made up of the herringbone gear dextrorotation gear teeth, herringbone gear circle arc tooth, the left-handed gear teeth section of herringbone gear successively, and two sides of the described herringbone gear gear teeth are configured to the herringbone gear wheel mark of mouth flank of tooth, herringbone gear gear teeth convex side respectively.
In such scheme, the helixangleβ on described herringbone gear dextrorotation gear teeth standard pitch circle
r, pressure angle α
rthe helixangleβ on left-handed gear teeth standard pitch circle with herringbone gear respectively
l, pressure angle α
lequal, and the standard pitch circle upward pressure angle α of the standard pitch circle upward pressure angle of the described herringbone gear dextrorotation gear teeth and the left-handed gear teeth of herringbone gear and herringbone gear circle arc tooth
aequal.
In such scheme, described herringbone gear circle arc tooth calibration cylinder is a radius of curvature along facewidth direction be ρ
acircular curve, the peak position of described circular curve is in the central symmetry cross section of the facewidth, and helix angle is zero degree; Wherein, the concave circular arc flank profil curved surface of described herringbone gear circle arc tooth side and the recessed flank profil curved surface of the herringbone gear dextrorotation gear teeth tangent, the concave circular arc flank profil curved surface of described herringbone gear circle arc tooth opposite side and the recessed flank profil curved surface of the left-handed gear teeth of herringbone gear tangent, and tangency location is coordinated symmetrical relative to facewidth middle section; The dome curved tooth contour curved surface of described herringbone gear circle arc tooth side and the double wedge contour curved surface of the herringbone gear dextrorotation gear teeth tangent, the double wedge contour curved surface of described herringbone gear circle arc tooth opposite side dome curved tooth contour curved surface and the left-handed gear teeth of herringbone gear is tangent, and tangency location is coordinated symmetrical relative to facewidth middle section.
In such scheme, the described herringbone gear dextrorotation gear teeth are along the width B of gear rotational axis
r, the width B of described herringbone gear circle arc tooth
a, the width B of the left-handed gear teeth
lfollowing relation is met with the total facewidth B of herringbone gear:
B
r＝B
l(2)
B
r+B
l+B
a＝B (3)
The radius of curvature ρ of described circular curve
acan be determined by following formula:
ρ
a＝0.5B
a/cosβ
r(4)。
The embodiment of the present invention additionally provides and a kind ofly manufactures the described processing method without tool withdrawal groove arc spiral line hybrid type herringbone gear, adopt grinding teeth of grinding wheel fine finishing to form the herringbone gear dextrorotation gear teeth, the left-handed gear teeth section of herringbone gear, adopt the fine finishing of tapered wheel roll flute to form herringbone gear circle arc tooth.
In such scheme, described employing grinding teeth of grinding wheel fine finishing forms the herringbone gear dextrorotation gear teeth, the left-handed gear teeth section of herringbone gear, realizes especially by following steps:
(1) left surface of formed grinding wheel and right flank accomplish the involute shape of ground herringbone gear helix gear teeth teeth groove;
(2) at the starting point A' of hybrid type herringbone gear end face, formed grinding wheel left surface contacts with flank profil on the left of the left-handed gear teeth teeth groove of herringbone gear, right flank 2012 contacts with flank profil on the right side of the left-handed gear teeth teeth groove of herringbone gear, and during roll flute work, emery wheel is around the axes O of self
2-O
2with angular velocity omega
2high Rotation Speed, edge teeth groove A' → B' direction progressive motion;
(3) the tangency location B' that emery wheel reaches the left-handed gear teeth of herringbone gear and herringbone gear circle arc tooth stops, and emery wheel corase grind cuts out two lateral tooth flanks of the left-handed teeth groove of whole teeth groove;
(4) by B' as starting point, emery wheel is around the axes O of self
2-O
2with angular velocity-ω
2high Rotation Speed, edge teeth groove B' → A' direction progressive motion, the starting point A' arriving gear face stops, and emery wheel fine grinding cuts out two lateral tooth flanks of the left-handed teeth groove of whole teeth groove;
(5) herringbone gear compound graduation after emery wheel withdrawing, repeats said process, institute's geared surface of the left-handed gear teeth of formed grinding wheel finishing grinding tooth herringbone gear;
(6) the finishing grinding tooth processing of flank profil on the right side of flank profil and dextrorotation teeth groove on the left of the dextrorotation teeth groove completing teeth groove according to step (1)-(5), i.e. the both sides flank profil of the herringbone gear dextrorotation gear teeth.
In such scheme, described employing tapered wheel roll flute fine finishing forms herringbone gear circle arc tooth, and concrete following steps of crossing realize:
(1) at the starting point B' of herringbone gear circle arc tooth, profile contact on the left of tapered wheel cone element and herringbone gear circular arc teeth groove, during roll flute, emery wheel and herringbone gear do a kind of generating motion;
(2) emery wheel is while around self axes O
3-O
3with angular velocity omega
3high Rotation Speed, edge teeth groove B' → B direction feeding, until the opposite side position B of circle arc tooth stops, tapered wheel corase grind cuts out the left side flank profil of the circular arc teeth groove of teeth groove;
(3) by B as starting point, according to the motion of above-mentioned generate and emery wheel, along teeth groove B → B' direction progressive motion, until the another location B' of circle arc tooth stops, tapered wheel fine grinding cuts out the left flank of the circular arc teeth groove of teeth groove;
(4) herringbone gear compound graduation after emery wheel withdrawing, repeats said process, all left flanks of tapered wheel finishing grinding tooth circular arc teeth groove;
(5) the finishing grinding tooth processing of flank profil on the right side of teeth groove circular arc teeth groove section can be realized according to step (1)-(5) tapered wheel.
Compared with prior art, beneficial effect of the present invention:
It is large that herringbone gear of the present invention has contact ratio, and engagement driving is steady, and noise is low, bearing capacity is large, the features such as compact structure, are very suitable for ship power, aviation machine transmission, heavy-duty vehicle engineering high-speed overload, the physical dimension of gear-box are had again to the occasion of strict restriction.
Accompanying drawing explanation
Fig. 1 is without tool withdrawal groove herringbone gear geometrical construction in prior art;
Fig. 2 has tool withdrawal groove herringbone gear geometrical construction in prior art;
A kind of geometrical construction without tool withdrawal groove arc spiral line hybrid type herringbone gear that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is the side view of Fig. 3;
A kind of helix wheel toothed portion forming grinding wheel formation teeth-grinding schematic diagram without tool withdrawal groove arc spiral line hybrid type herringbone gear that Fig. 5 provides for the embodiment of the present invention;
A kind of circular arc gear tooth portions tapered wheel generating method roll flute without tool withdrawal groove arc spiral line hybrid type herringbone gear that Fig. 6 provides for the embodiment of the present invention.
Wherein: 10-herringbone gear wheel body; The 101-herringbone gear gear teeth; The 1011-herringbone gear dextrorotation gear teeth; 1012-herringbone gear circle arc tooth; The left-handed gear teeth of 1013-herringbone gear; 102-herringbone gear wheel teeth groove; Flank profil on the left of the left-handed gear teeth teeth groove of 1021-herringbone gear; Flank profil on the right side of the left-handed gear teeth teeth groove of 1022-herringbone gear; Flank profil on the left of 1023-herringbone gear circular arc teeth groove; Flank profil on the right side of 1024-herringbone gear circular arc teeth groove; Flank profil on the left of 1025-herringbone gear dextrorotation gear teeth teeth groove; Flank profil on the right side of 1026-herringbone gear dextrorotation gear teeth teeth groove; The 1031-herringbone gear wheel mark of mouth flank of tooth; 1032-herringbone gear gear teeth convex side; 20-formed grinding wheel; 2011-formed grinding wheel left surface; 2012-formed grinding wheel right flank; 30-tapered wheel; The 301-emery wheel conical surface.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The embodiment of the present invention provides a kind of without tool withdrawal groove arc spiral line hybrid type herringbone gear, as Fig. 3, shown in 4, this gear comprises herringbone gear wheel body 10, described herringbone gear wheel body 10 is processed with several herringbone gear gear teeth 101, herringbone gear teeth groove 102 is offered between several herringbone gear gear teeth 101 described, the described herringbone gear gear teeth 101 are successively by the herringbone gear dextrorotation gear teeth 1011 (AB section), herringbone gear circle arc tooth 1012 (BB' section), the left-handed gear teeth section 1013 (A'B' section) of herringbone gear is formed, two sides of the described herringbone gear gear teeth 101 are respectively arranged with the herringbone gear wheel mark of mouth flank of tooth 1031, herringbone gear gear teeth convex side 1032.
Helixangleβ on the described herringbone gear dextrorotation gear teeth 1011 standard pitch circle
r, pressure angle α
rthe helixangleβ on the left-handed gear teeth 1013 standard pitch circle with herringbone gear respectively
l, pressure angle α
lequal, and the standard pitch circle upward pressure angle of the described herringbone gear dextrorotation gear teeth 1011 and the left-handed gear teeth 1013 of herringbone gear and the standard pitch circle upward pressure angle α of herringbone gear circle arc tooth 1012
aequal, have: β
r=β
l, α
r=α
l=α
a(1).
Described herringbone gear circle arc tooth 1012 calibration cylinder is a radius of curvature along facewidth direction be ρ
acircular curve, the peak position of described circular curve is in the central symmetry cross section of the facewidth, and helix angle is zero degree; Wherein, the concave circular arc flank profil curved surface of described herringbone gear circle arc tooth 1012 side and the recessed flank profil curved surface of the herringbone gear dextrorotation gear teeth 1011 tangent, the concave circular arc flank profil curved surface of described herringbone gear circle arc tooth 1012 opposite side and the recessed flank profil curved surface of the left-handed gear teeth of herringbone gear 1013 tangent, and tangency location is coordinated symmetrical relative to facewidth middle section; The dome curved tooth contour curved surface of described herringbone gear circle arc tooth 1012 side and the double wedge contour curved surface of the herringbone gear dextrorotation gear teeth 1011 tangent, the double wedge contour curved surface of described herringbone gear circle arc tooth 1012 opposite side dome curved tooth contour curved surface and the left-handed gear teeth of herringbone gear 1013 is tangent, and tangency location is coordinated symmetrical relative to facewidth middle section.
The described herringbone gear dextrorotation gear teeth 1011 are along the width B of gear rotational axis
r, the width B of described herringbone gear circle arc tooth 1012
a, the width B of the left-handed gear teeth 1013
lfollowing relation is met with the total facewidth B of herringbone gear:
B
r＝B
l(2)
B
r+B
l+B
a＝B (3)
The radius of curvature ρ of described circular curve
acan be determined by following formula:
ρ
a＝0.5B
a/cosβ
r(4)。
The addendum coefficient of the arc spiral line hybrid type herringbone gear circular arc three sections of gear teeth in the present invention
with tip clearance coefficient c
*all get state specified standards value, be involute profile perpendicular to (end face) on the cross section of axis, between the neighboring spiral gear teeth, the spacewidth of standard pitch circle equals the spacewidth of standard pitch circle between the adjacent circular arc gear teeth.The engagement of arc spiral line hybrid type herringbone gear is that dextrorotation gear teeth AB section and left-handed gear teeth A'B' section enter engagement first simultaneously, and then circle arc tooth BB' section enters engagement, and circle arc tooth BB' section and phase gear are that convex-concave contacts.Namely the recessed flank of tooth of the circle arc tooth of driving gear contacts with the circle arc tooth convex side of driven gear, or the circle arc tooth convex side of driving gear contacts with the recessed flank of tooth of the circle arc tooth of driven gear, define actual recessed-convex side between containment relationship, ensure that the correct engagement of circle arc tooth BB'.
Therefore, it is large that arc spiral line hybrid type herringbone gear of the present invention has contact ratio, engagement driving is steady, noise is low, bearing capacity is large, the features such as compact structure, are very suitable for ship power, aviation machine transmission, heavy-duty vehicle engineering high-speed overload, the physical dimension of gear-box are had again to the occasion of strict restriction.
The embodiment of the present invention also provides one without the processing method of tool withdrawal groove arc spiral line hybrid type herringbone gear, adopt grinding teeth of grinding wheel fine finishing to form the herringbone gear dextrorotation gear teeth 1011, the left-handed gear teeth section 1013 of herringbone gear, adopt the fine finishing of tapered wheel 30 roll flute to form herringbone gear circle arc tooth 1012.
As shown in Figure 5, described employing grinding teeth of grinding wheel fine finishing forms the herringbone gear dextrorotation gear teeth 1011, the left-handed gear teeth section 1013 of herringbone gear, realizes especially by following steps:
(1) left surface 2011 of formed grinding wheel 20 and right flank 2012 accomplish the involute shape of ground herringbone gear helix gear teeth teeth groove;
(2) at the starting point A' of hybrid type herringbone gear end face, formed grinding wheel left surface 2011 contacts with flank profil 1021 on the left of the left-handed gear teeth teeth groove of herringbone gear, right flank 2012 contacts with flank profil 1022 on the right side of the left-handed gear teeth teeth groove of herringbone gear, and during roll flute work, emery wheel is around the axes O of self
2-O
2with angular velocity omega
2high Rotation Speed, edge teeth groove A' → B' direction progressive motion;
(3) emery wheel reaches the left-handed gear teeth of herringbone gear 1013 and stops with the tangency location B' of herringbone gear circle arc tooth 1012, and two lateral tooth flanks cutting out the left-handed teeth groove of whole teeth groove 102 roughly ground by emery wheel;
(4) by B' as starting point, emery wheel is around the axes O of self
2-O
2with angular velocity-ω
2high Rotation Speed, edge teeth groove B' → A' direction progressive motion, the starting point A' arriving gear face stops, and emery wheel fine grinding cuts out two lateral tooth flanks of the left-handed teeth groove of whole teeth groove 102;
(5) herringbone gear compound graduation after emery wheel withdrawing, repeats said process, institute's geared surface of the left-handed gear teeth 1013 of formed grinding wheel finishing grinding tooth herringbone gear;
(6) the finishing grinding tooth processing of flank profil 1026 on the right side of flank profil 1025 and dextrorotation teeth groove on the left of the dextrorotation teeth groove completing teeth groove 102 according to step (1)-(5), i.e. the both sides flank profil of the herringbone gear dextrorotation gear teeth 1011.
As shown in Figure 6, described employing tapered wheel 30 roll flute fine finishing forms herringbone gear circle arc tooth 1012, realizes especially by following steps:
(1) at the starting point B' of herringbone gear circle arc tooth 1012, tapered wheel cone element contacts with flank profil 1023 on the left of herringbone gear circular arc teeth groove, and during roll flute work, emery wheel and herringbone gear do a kind of rolling movement;
(2) emery wheel is while around self axes O
3-O
3with angular velocity omega
3high Rotation Speed, edge teeth groove B' → B direction feeding, until the opposite side position B of circle arc tooth 1012 stops, tapered wheel corase grind cuts out the left side flank profil of the circular arc teeth groove of teeth groove 102;
(3) by B as starting point, according to the motion of above-mentioned generate and emery wheel, along teeth groove B → B' direction progressive motion, until the another location B' of circle arc tooth stops, tapered wheel fine grinding cuts out the left flank of the circular arc teeth groove of teeth groove 102;
(4) herringbone gear compound graduation after emery wheel withdrawing, repeats said process, all left flanks of tapered wheel finishing grinding tooth circular arc teeth groove;
(5) the finishing grinding tooth processing of flank profil on the right side of teeth groove 102 circular arc teeth groove section can be realized according to step (1)-(5) tapered wheel.
Embodiment 1
Design condition: herringbone gear modulus m
n=3.5mm, pressure angle α
n=20 °,
, tip clearance coefficient c
*=0.25, number of teeth z=31, facewidth B=210mm, helixangleβ=30
0, B
l=B
r=70mm, B
a=70mm.
Reference Design scheme
Physical dimension is as follows: standard pitch diameter d
1=125.28mm, addendum h
a=3.5mm, dedendum of the tooth h
f=4.375mm, whole depth h=7.875mm, the radius of curvature ρ of arc section
a=40.42mm.
(2) herringbone gear roll flute fine finishing
1) on the main shaft at numerical control gear grinding machine bed or multi-axis NC machining center, install formed grinding wheel, formed grinding wheel bi-side are designed to the profile geometry of the left-handed or dextrorotation teeth groove bi-side of herringbone gear to be ground.
2) herringbone gear with corase grind allowance fluting is arranged on the worktable of the numerically controlled tooth grinding machine bed being furnished with calibration function.
3) formed grinding wheel quick position is in the end face A' point of a herringbone gear left-handed teeth groove.
4) formed grinding wheel high speed rotary and along teeth groove direction advance until B', corase grind cut herringbone gear left hand screw line segment part.
5) formed grinding wheel high speed rotary being advanced by B' until A' along teeth groove direction, fine ginding herringbone gear left hand screw line segment part.
6) emery wheel withdrawing, workpiece circular index, repeats 3) and 4) complete the roll flute of whole gear left-handed teeth groove adjacent teeth contour curved surface.
7) same process, repeats 3), 4), 5) and, 6) complete the roll flute of whole gear dextrorotation teeth groove adjacent teeth contour curved surface.
8) on the main shaft with application tapered wheel numerical control gear grinding machine bed, install tapered wheel, tapered wheel element of cone is designed to the profile geometry of imaginary rack cutter.
9) herringbone gear with corase grind allowance arc section fluting is arranged on the worktable of the numerically controlled tooth grinding machine bed with revolute function.
10) tapered wheel quick position is after the left flank starting point B' of herringbone gear arc section teeth groove, and tapered wheel and herringbone gear do a generating motion, the flank profil of the grinding arc section gear teeth.
11) tapered wheel high speed rotary and along teeth groove direction advance until B, corase grind cut flank profil curved surface on the left of arc section teeth groove.
12) tapered wheel high speed rotary being advanced by B until B' along teeth groove direction, flank profil curved surface on the left of fine ginding arc section teeth groove.
13) emery wheel withdrawing, workpiece circular index, repeat step 10), 11), 12) complete flank profil curved surface on the left of whole gear arc section teeth groove roll flute processing.
14) same process, repeat step 10), 11), 12), 13) complete flank profil curved surface on the right side of whole gear arc section teeth groove roll flute processing.
Embodiment 2
Design condition: herringbone gear modulus m
n=3.5mm, pressure angle α
n=20 °,
, tip clearance coefficient c
*=0.25, number of teeth z=31, facewidth B=210mm, helixangleβ=30
0, B
l=B
r=78.75mm, B
a=0.25B=52.5mm.
(1) Reference Design scheme
Physical dimension is as follows: standard pitch diameter d
1=125.28mm, addendum h
a=3.5mm, dedendum of the tooth h
f=4.375mm, whole depth h=7.875mm, the radius of curvature ρ of arc section
a=30.31mm.
(2) herringbone gear roll flute fine finishing
1) on the main shaft at numerical control gear grinding machine bed or multi-axis NC machining center, install formed grinding wheel, formed grinding wheel bi-side are designed to the profile geometry of the left-handed or dextrorotation teeth groove bi-side of herringbone gear to be ground.
2) herringbone gear with corase grind allowance fluting is arranged on the worktable of the numerically controlled tooth grinding machine bed being furnished with calibration function.
3) formed grinding wheel quick position is in the end face A' point of a herringbone gear left-handed teeth groove.
4) formed grinding wheel high speed rotary and along teeth groove direction advance until B', corase grind cut herringbone gear left hand screw line segment part.
5) formed grinding wheel high speed rotary being advanced by B' until A' along teeth groove direction, fine ginding herringbone gear left hand screw line segment part.
6) emery wheel withdrawing, workpiece circular index, repeats 3) and 4) complete the roll flute of whole gear left-handed teeth groove adjacent teeth contour curved surface.
7) same process, repeats 3), 4), 5) and, 6) complete the roll flute of whole gear dextrorotation teeth groove adjacent teeth contour curved surface.
8) on the main shaft with application tapered wheel numerical control gear grinding machine bed, install tapered wheel, tapered wheel element of cone is designed to the profile geometry of imaginary rack cutter.
9) herringbone gear with corase grind allowance arc section fluting is arranged on the worktable of the grinding machine bed with revolute function.
10) tapered wheel quick position is after the left flank starting point B' of herringbone gear arc section teeth groove, and tapered wheel and herringbone gear do a generating motion, the flank profil of the grinding arc section gear teeth.
11) tapered wheel high speed rotary and along teeth groove direction advance until B, corase grind cut flank profil curved surface on the left of arc section teeth groove.
12) tapered wheel high speed rotary being advanced by B until B' along teeth groove direction, flank profil curved surface on the left of fine ginding arc section teeth groove.
13) emery wheel withdrawing, workpiece circular index, repeat step 10), 11), 12) complete flank profil curved surface on the left of whole gear arc section teeth groove roll flute processing.
14) same process, repeat step 10), 11), 12), 13) complete flank profil curved surface on the right side of whole gear arc section teeth groove roll flute processing.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (7)
1. one kind without tool withdrawal groove arc spiral line hybrid type herringbone gear, it is characterized in that: this gear comprises herringbone gear wheel body (10), described herringbone gear wheel body (10) is processed with several herringbone gear gear teeth (101), herringbone gear teeth groove (102) is offered between several herringbone gear gear teeth (101) described, the described herringbone gear gear teeth (101) are successively by the herringbone gear dextrorotation gear teeth (1011), herringbone gear circle arc tooth (1012), the left-handed gear teeth section (1013) of herringbone gear is formed, two sides of the described herringbone gear gear teeth (101) are configured to the herringbone gear wheel mark of mouth flank of tooth (1031) respectively, herringbone gear gear teeth convex side (1032).
2. according to claim 1 without tool withdrawal groove arc spiral line hybrid type herringbone gear, it is characterized in that: the helixangleβ on the described herringbone gear dextrorotation gear teeth (1011) standard pitch circle
r, pressure angle α
rthe helixangleβ on the left-handed gear teeth (1013) standard pitch circle with herringbone gear respectively
l, pressure angle α
lequal, and the standard pitch circle upward pressure angle of the described herringbone gear dextrorotation gear teeth (1011) and the left-handed gear teeth of herringbone gear (1013) and the standard pitch circle upward pressure angle α of herringbone gear circle arc tooth (1012)
aequal.
3. according to claim 1 and 2 without tool withdrawal groove arc spiral line hybrid type herringbone gear, it is characterized in that: described herringbone gear circle arc tooth (1012) calibration cylinder is a radius of curvature along facewidth direction be ρ
acircular curve, the peak position of described circular curve is in the central symmetry cross section of the facewidth, and helix angle is zero degree; Wherein, the concave circular arc flank profil curved surface of described herringbone gear circle arc tooth (1012) side and the recessed flank profil curved surface of the herringbone gear dextrorotation gear teeth (1011) tangent, the concave circular arc flank profil curved surface of described herringbone gear circle arc tooth (1012) opposite side and the recessed flank profil curved surface of the left-handed gear teeth of herringbone gear (1013) tangent, and tangency location is coordinated symmetrical relative to facewidth middle section; The dome curved tooth contour curved surface of described herringbone gear circle arc tooth (1012) side and the double wedge contour curved surface of the herringbone gear dextrorotation gear teeth (1011) tangent, the double wedge contour curved surface of described herringbone gear circle arc tooth (1012) opposite side dome curved tooth contour curved surface and the left-handed gear teeth of herringbone gear (1013) is tangent, and tangency location is coordinated symmetrical relative to facewidth middle section.
4. according to claim 3 without tool withdrawal groove arc spiral line hybrid type herringbone gear, it is characterized in that: the described herringbone gear dextrorotation gear teeth (1011) are along the width B of gear rotational axis
r, the width B of described herringbone gear circle arc tooth (1012)
a, the width B of the left-handed gear teeth (1013)
lfollowing relation is met with the total facewidth B of herringbone gear:
B
r＝B
l(2)
B
r+B
l+B
a＝B (3)
The radius of curvature ρ of described circular curve
acan be determined by following formula:
ρ
a＝0.5B
a/cosβ
r(4)。
5. manufacture as claimed in claim 1 without the processing method of tool withdrawal groove arc spiral line hybrid type herringbone gear, it is characterized in that: adopt formed grinding wheel (20) roll flute fine finishing to form the herringbone gear dextrorotation gear teeth (1011), the left-handed gear teeth section (1013) of herringbone gear, adopt tapered wheel (30) roll flute fine finishing to form herringbone gear circle arc tooth (1012).
6. the processing method without tool withdrawal groove arc spiral line hybrid type herringbone gear according to claim 5, it is characterized in that: described employing grinding teeth of grinding wheel fine finishing forms the herringbone gear dextrorotation gear teeth (1011), the left-handed gear teeth section (1013) of herringbone gear, realizes especially by following steps:
(1) left surface (2011) of formed grinding wheel (20) and right flank (2012) accomplish the involute shape of ground herringbone gear helix gear teeth teeth groove;
(2) at the starting point A' of hybrid type herringbone gear end face, formed grinding wheel left surface (2011) contacts with flank profil (1021) on the left of the left-handed gear teeth teeth groove of herringbone gear, right flank (2012) contacts with flank profil (1022) on the right side of the left-handed gear teeth teeth groove of herringbone gear, and during roll flute work, emery wheel is around the axes O of self
2-O
2with angular velocity omega
2high Rotation Speed, edge teeth groove A' → B' direction progressive motion;
(3) the tangency location B' that emery wheel reaches the left-handed gear teeth of herringbone gear (1013) and herringbone gear circle arc tooth (1012) stops, and two lateral tooth flanks cutting out the left-handed teeth groove of whole teeth groove (102) roughly ground by emery wheel;
(4) by B' as starting point, emery wheel is around the axes O of self
2-O
2with angular velocity-ω
2high Rotation Speed, edge teeth groove B' → A' direction progressive motion, the starting point A' arriving gear face stops, and emery wheel fine grinding cuts out two lateral tooth flanks of the left-handed teeth groove of whole teeth groove (102);
(5) herringbone gear compound graduation after emery wheel withdrawing, repeats said process, institute's geared surface of the left-handed gear teeth of formed grinding wheel finishing grinding tooth herringbone gear (1013);
(6) the finishing grinding tooth processing of flank profil (1026) on the right side of flank profil (1025) and dextrorotation teeth groove on the left of the dextrorotation teeth groove completing teeth groove (102) according to step (1)-(5), i.e. the both sides flank profil of the herringbone gear dextrorotation gear teeth (1011).
7. the processing method without tool withdrawal groove arc spiral line hybrid type herringbone gear according to claim 5, it is characterized in that: described employing tapered wheel (30) roll flute fine finishing forms herringbone gear circle arc tooth (1012), concrete following steps of crossing realize:
(1) at the starting point B' of herringbone gear circle arc tooth (1012), tapered wheel cone element contacts with flank profil (1023) on the left of herringbone gear circular arc teeth groove, and during roll flute, emery wheel and herringbone gear do a kind of generating motion;
(2) emery wheel is while around self axes O
3-O
3with angular velocity omega
3high Rotation Speed, edge teeth groove B' → B direction feeding, until the opposite side position B of circle arc tooth (1012) stops, tapered wheel corase grind cuts out the left side flank profil of the circular arc teeth groove of teeth groove 102;
(3) by B as starting point, according to the motion of above-mentioned generate and emery wheel, along teeth groove B → B' direction progressive motion, until the another location B' of circle arc tooth stops, tapered wheel fine grinding cuts out the left flank of the circular arc teeth groove of teeth groove (102);
(4) herringbone gear compound graduation after emery wheel withdrawing, repeats said process, all left flanks of tapered wheel finishing grinding tooth circular arc teeth groove;
(5) the finishing grinding tooth processing of flank profil on the right side of teeth groove (102) circular arc teeth groove section can be realized according to step (1)-(5) tapered wheel.
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| CN111097973A (en) * | 2019-12-27 | 2020-05-05 | 湖南工业大学 | Method for half-expanding and processing herringbone gear by using finger-shaped cutter |
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