CN106825711B - The method for milling of enveloping worm hob spiral chip flute - Google Patents

The method for milling of enveloping worm hob spiral chip flute Download PDF

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Publication number
CN106825711B
CN106825711B CN201710218072.7A CN201710218072A CN106825711B CN 106825711 B CN106825711 B CN 106825711B CN 201710218072 A CN201710218072 A CN 201710218072A CN 106825711 B CN106825711 B CN 106825711B
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worm
axis
cutter
milling
hob
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CN106825711A (en
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李海涛
杨杰
刘平义
芮成杰
魏文军
董学朱
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China Agricultural University
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China Agricultural University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C3/00Milling particular work; Special milling operations; Machines therefor
    • B23C3/28Grooving workpieces
    • B23C3/32Milling helical grooves, e.g. in making twist-drills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C2220/00Details of milling processes
    • B23C2220/36Production of grooves
    • B23C2220/363Spiral grooves

Abstract

The present invention relates to a kind of method for milling of enveloping worm hob spiral chip flute, belong to the processing method of enveloping worm hob;Technical solution includes hobboing cutter basic worm (1), cylindrical milling cutter (2), worm axis (3) and milling cutter axis (4), hobboing cutter basic worm (1) is mounted on C axis, worm axis (3) is overlapped with Z axis, cylindrical milling cutter (2) is mounted on the knife rest of numerically-controlled machine tool, milling cutter axis (4) is parallel with X-axis, enveloping worm (1) is dynamic with C shaft rotations, cylindrical milling cutter does the movement of Z axis and X-direction, and it is R that three-shaft linkage, which processes radius,fArc groove bottom hobboing cutter spiral chip flute, form hobboing cutter rake face, realize that the anterior angle of each cutter tooth both sides on indexing anchor ring is 0 °.

Description

The method for milling of enveloping worm hob spiral chip flute
Technical field
The present invention relates to a kind of method for milling of enveloping worm hob spiral chip flute, belong to the processing of enveloping worm hob Method.
Background technology
Dong Xuezhu writes《Enveloping worm drive designs and correction of the flank shape》In worm gear usually formed by hob cutting, the such snail of rolling cut The hobboing cutter of wheel is known as enveloping worm hob.Helicoid is processed by blank and forms hobboing cutter basic worm, by hobboing cutter basic worm into One step processes chip pocket and rear corner surface obtains enveloping worm hob.Chip pocket is generally divided into straight trough and helicla flute two types, When the head number of enveloping worm hob is less, the helix angle on hobboing cutter basic worm helicoid is smaller, and straight chip flute may be used, Cutter tooth both sides negative rake is little at this time, and the influence to cutter tooth cutting ability is smaller;When the head number of enveloping worm hob is more, hobboing cutter Helix angle on basic worm helicoid is larger, if using straight chip flute, cutter tooth side negative rake is very big, leads to the lateral incision Inclement condition is cut, so needing to use spiral chip flute.
Currently, the processing method of enveloping worm hob spiral chip flute is there is not yet open report, it can be common that gear rolls The processing method of knife and cylinder worm gear hob spiral chip flute:Workpiece is rotated with certain speed around axis of workpiece, and cutter exists Its spiral chip flute is processed in the both direction movement for being parallel and perpendicular to axis of workpiece.For enveloping worm hob, due to hobboing cutter Helix angle γ on basic worm helicoid is different everywhere:On indexing anchor ring, axially showed along hobboing cutter intermediate small by two Big trend is held, the anterior angle of each cutter tooth both sides on indexing anchor ring is cannot achieve using the method for above-mentioned processing spiral chip flute All it is 0 °, therefore can not ensures the good cutting of cutter tooth.
Invention content
The invention aims to provide a kind of processing enveloping worm hob spiral on the universal numerical control milling machine with C axis The method of chip pocket also mills out the rake face of enveloping worm hob while milling enveloping worm hob spiral chip flute, This method for milling can ensure that the anterior angle of each cutter tooth both sides on indexing anchor ring is 0 °.
Include to reach the technical solution that the purpose of the present invention is taken:Hobboing cutter basic worm 1, cylindrical milling cutter 2, worm screw Axis 3 and milling cutter axis 4, throat's mid-plane of hobboing cutter basic worm 1 and the intersection point of worm axis 3 are O, hobboing cutter basic worm 1 fillet radius is Rf, its center of circle be O1, OO1For the centre-to-centre spacing a, d of enveloping worm pair1For the larynx of hobboing cutter basic worm 1 Portion's reference diameter, γ are lead angle of 1 helicoid of hobboing cutter basic worm on indexing anchor ring,To process hobboing cutter base by blank The corner of blank when the helicoid of this worm screw 1, hobboing cutter basic worm 1 around worm axis 3 with C shaft rotations dynamic, instantaneous cornerZ axis with Worm axis 3 overlaps, X-axis and OO1Overlap, milling cutter axis 4 is parallel with X-axis always, cylindrical milling cutter 2 around 4 rotation of milling cutter axis simultaneously And the movement of Z axis and X-direction is done, immediate movement ziAnd xiMeet relational expression:Relative motion relation is full Foot:X-axis, Z axis and C axle linkage process the spiral chip flute 5 of enveloping worm hob, form anchor ring snail Take turns the rake face 6 of hobboing cutter, lead angle of the rake face 6 on indexing anchor ringMeet in indexing anchor ring The anterior angle of upper each cutter tooth both sides is 0 °.
In the method for milling of above-mentioned enveloping worm hob spiral chip flute, cylindrical milling cutter 2 is changed into coned cutter, process The spiral chip flute 5 for going out enveloping worm hob forms the rake face 6 of enveloping worm hob, same to meet on indexing anchor ring often The anterior angle of a cutter tooth both sides is all 0 °.
The beneficial effects of the present invention are:By using X-axis, the spiral shell of Z axis and C axle linkage Milling Process enveloping worm hob Chip pocket is revolved, forms the rake face of enveloping worm hob, rake face and the hobboing cutter for meeting the enveloping worm hob processed are basic The helicoid of worm screw is vertical at indexing anchor ring, realizes that the anterior angle of each cutter tooth both sides on indexing anchor ring is 0 °, and then To the enveloping worm hob with good cutting.
Description of the drawings
Fig. 1 is the Milling Principle figure in the CNC milling machine upper ring surface worm gear hob spiral chip flute of three-shaft linkage;
Fig. 2 is hobboing cutter basic worm schematic diagram;
Fig. 3 is the spiral chip flute and rake face schematic diagram of enveloping worm hob;
In figure:1-hobboing cutter basic worm, 2-cylindrical milling cutters, 3-worm axis, 4-milling cutter axis, 5-spirals hold bits Slot, 6-rake faces.
Specific implementation mode
The embodiment of the present invention is described below according to attached drawing.It is with the planar double-enveloping worm of not correction of the flank shape Example, relevant parameter are:The centre-to-centre spacing a=160mm of enveloping worm pair, hobboing cutter basic worm is as shown in Fig. 2, hobboing cutter basic worm Throat reference diameter d1=65mm, the fillet radius R of hobboing cutter basic wormf=133.24mm processes hobboing cutter basic worm When main base radius rb=47.5mm, the active length L=90mm of hobboing cutter basic worm.
Fig. 1 is the method for milling original in the CNC milling machine upper ring surface worm gear hob spiral chip flute of C axis, X-axis and Z-axis linkage Reason figure, the method for milling of enveloping worm hob spiral chip flute includes hobboing cutter basic worm 1, cylindrical milling cutter 2,3 and of worm axis Milling cutter axis 4, throat's mid-plane of hobboing cutter basic worm 1 and the intersection point of worm axis 3 are O, the tooth root of hobboing cutter basic worm 1 Arc radius is Rf, its center of circle be O1, OO1For the centre-to-centre spacing a, d of enveloping worm pair1For throat's reference circle of hobboing cutter basic worm 1 Diameter, γ are lead angle of 1 helicoid of hobboing cutter basic worm on indexing anchor ring,To process hobboing cutter basic worm 1 by blank The corner of blank when helicoid, hobboing cutter basic worm 1 around worm axis 3 with C shaft rotations dynamic, instantaneous cornerZ axis and worm axis 3 It overlaps, X-axis and OO1Overlap, radius be 3mm cylindrical milling cutter 2 be mounted on numerically-controlled machine tool knife rest on, milling cutter axis 4 always with X Axis is parallel, and cylindrical milling cutter 2 is around 4 rotation of milling cutter axis and is the movement of Z axis and X-direction, immediate movement ziAnd xiMeet relationship Formula:Relative motion relation meets:X-axis, Z axis and C axle linkage process anchor ring snail The spiral chip flute 5 for taking turns hobboing cutter forms the rake face 6 of enveloping worm hob, lead angle of the rake face 6 on indexing anchor ringThe anterior angle for meeting each cutter tooth both sides on indexing anchor ring is 0 ° (as shown in Figure 3).
Enveloping worm hob as shown in Figure 3 often arranges cutter tooth and shares 5 teeth, 1 helicoid of hobboing cutter basic worm and rake face 6 on indexing anchor ring common phase friendship have 10 points, each point is followed successively by the coordinate value of Z-direction:z1=-38.2, z2=-31.1, z3=-21.5, z4=-13.5, z5=-4.23, z6=3.92, z7=13.2, z8=21.1, z9=30.7, z10=37.88, it is right Should 1 helicoid of the place's of putting hobboing cutter basic worm indexing anchor ring on lead angle be respectively:γ1=0.3077rad, γ2= 0.3300rad, γ3=0.3490rad, γ4=0.3633rad, γ5=0.3717rad, γ6=0.3722rad, γ7= 0.3644rad, γ8=0.3506rad, γ9=0.3321rad, γ10=0.3100rad, by the numerical control of above-mentioned three-shaft linkage The spiral chip flute 5 of milling machine processing enveloping worm hob obtains lead angle difference of the corresponding point position rake face 6 on indexing anchor ring For:γq1=1.2631rad, γq2=1.2408rad, γq3=1.2218rad, γq4=1.2075rad, γq5= 1.1990rad γq6=1.1985rad, γq7=1.2064rad, γq8=1.2202rad, γq9=1.2387rad, γq10= 1.2608rad meets at each pointThe anterior angle for meeting each cutter tooth both sides on indexing anchor ring is 0 °.

Claims (2)

1. the method for milling of enveloping worm hob spiral chip flute, which is characterized in that including hobboing cutter basic worm (1), cylinder milling Knife (2), worm axis (3) and milling cutter axis (4), the friendship of the throat's mid-plane and worm axis (3) of hobboing cutter basic worm (1) Point is O, and the fillet radius of hobboing cutter basic worm (1) is Rf, its center of circle be O1, OO1For the centre-to-centre spacing a, d of enveloping worm pair1 For throat's reference diameter of hobboing cutter basic worm (1), γ is helical pitch of hobboing cutter basic worm (1) helicoid on indexing anchor ring Angle,For by the corner of blank when the helicoid of blank processing hobboing cutter basic worm (1), hobboing cutter basic worm (1) is around worm axis (3) dynamic, the instantaneous corner with C shaft rotationsZ axis is overlapped with worm axis (3), X-axis and OO1Overlap, milling cutter axis (4) always with X-axis Parallel, cylindrical milling cutter (2) is around (4) rotation of milling cutter axis and is the movement of Z axis and X-direction, immediate movement ziAnd xiMeet and closes It is formula:Relative motion relation meets:X-axis, Z axis and C axle linkage, process anchor ring The spiral chip flute (5) of worm gear hob forms the rake face (6) of enveloping worm hob, rake face (6) leading on indexing anchor ring Journey angleThe anterior angle for meeting each cutter tooth both sides on indexing anchor ring is 0 °.
2. the method for milling of enveloping worm hob spiral chip flute according to claim 1, which is characterized in that by cylinder milling Knife (2) changes coned cutter into, processes the spiral chip flute (5) of enveloping worm hob, forms the rake face of enveloping worm hob (6), the same anterior angle for meeting each cutter tooth both sides on indexing anchor ring is 0 °.
CN201710218072.7A 2017-04-05 2017-04-05 The method for milling of enveloping worm hob spiral chip flute Active CN106825711B (en)

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CN110125490B (en) * 2019-05-17 2020-05-22 淮阴工学院 Method for finish milling of gear surface of Niemann worm gear by using full-edge side edge of flat-bottom taper milling cutter

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875635A (en) * 1974-04-15 1975-04-08 Le Metallichesky Z Im Xxii Sie Method of forming globoid worm thread and worm wheel teeth
SU1328092A1 (en) * 1986-03-24 1987-08-07 Научно-производственное объединение по технологии машиностроения Method of producing gear for modified globoidal gearing
CN101700576A (en) * 2009-10-21 2010-05-05 中国农业大学 Rough machining method of helical surface of hourglass worm
CN101774029A (en) * 2009-12-28 2010-07-14 中国农业大学 Method for turning helical surface of enveloping worm
CN101837483A (en) * 2010-05-31 2010-09-22 中国农业大学 Milling and processing method of spiral surface of ring surface worm
CN101837484A (en) * 2010-05-31 2010-09-22 中国农业大学 Milling method of spiral surface of ring surface worm
CN102513615A (en) * 2011-12-20 2012-06-27 付贵臣 Numerical-control gear cogging method and special equipment
CN106270812A (en) * 2016-08-30 2017-01-04 中钢集团西安重机有限公司 A kind of method of lathe in machining helical surface of enveloping worm

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875635A (en) * 1974-04-15 1975-04-08 Le Metallichesky Z Im Xxii Sie Method of forming globoid worm thread and worm wheel teeth
SU1328092A1 (en) * 1986-03-24 1987-08-07 Научно-производственное объединение по технологии машиностроения Method of producing gear for modified globoidal gearing
CN101700576A (en) * 2009-10-21 2010-05-05 中国农业大学 Rough machining method of helical surface of hourglass worm
CN101774029A (en) * 2009-12-28 2010-07-14 中国农业大学 Method for turning helical surface of enveloping worm
CN101837483A (en) * 2010-05-31 2010-09-22 中国农业大学 Milling and processing method of spiral surface of ring surface worm
CN101837484A (en) * 2010-05-31 2010-09-22 中国农业大学 Milling method of spiral surface of ring surface worm
CN102513615A (en) * 2011-12-20 2012-06-27 付贵臣 Numerical-control gear cogging method and special equipment
CN106270812A (en) * 2016-08-30 2017-01-04 中钢集团西安重机有限公司 A kind of method of lathe in machining helical surface of enveloping worm

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