CN100537097C - Tooth direction shaping gear hobbing processing technique - Google Patents
Tooth direction shaping gear hobbing processing technique Download PDFInfo
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- CN100537097C CN100537097C CNB2007100239775A CN200710023977A CN100537097C CN 100537097 C CN100537097 C CN 100537097C CN B2007100239775 A CNB2007100239775 A CN B2007100239775A CN 200710023977 A CN200710023977 A CN 200710023977A CN 100537097 C CN100537097 C CN 100537097C
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- 238000012545 processing Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 13
- 238000007493 shaping process Methods 0.000 title 1
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000012937 correction Methods 0.000 claims description 32
- 238000012360 testing method Methods 0.000 claims description 23
- 238000012986 modification Methods 0.000 claims description 16
- 230000004048 modification Effects 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims description 3
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 4
- 238000013461 design Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
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Abstract
The invention relates to the machining of gear teeth. The machining process comprises: Based on the drawing, it uses the hobber machining the gear to the inspection point A or D, computing the differential change wheel angle t based on the hobber differential mechanism with CB line actual spiral angle and gear and hobber parameter, loosening the differential change wheel, holding the change angle t, imitating the difference of machining small spiral gears, forming fixing point from the end surface fixing theoretical point C. It can get rid of the deficiencies of step, insufficient effective hardening and teeth surface hardness.
Description
Technical field
The present invention relates to a kind of tooth-formation of gear processing technology, particularly a kind of gear hobbing technology of relatively very big axial modification.
Background technology
Along with the promotion of development of modern industry and mathematical theory, gear train assembly develops to high-speed overload small size low weight direction.In order to adapt to the demand of gear train assembly development, the gear of design requires to have very big axial modification relatively sometimes, the special asymmetric axial modification of the left and right sides flank of tooth.If this gear adopts traditional gear hobbing to add the process of roll flute, the shortcoming that allows existence anything but can appear designing in the place that gear teeth profiling quantity is big behind the roll flute.These shortcomings are that (1) tooth root has step; (2) effective case depth is not enough; (3) tooth face hardness is not enough.They have great harmfulness to the everyways such as normal service life of gear.Obviously, the traditional gear hobbing manufacturing process that adds roll flute can't satisfy advanced design of gears requirement.
At present, for this gear, take following several method usually: (1) strengthens the boss amount of hobboing cutter; (2) keep the roll flute step behind the roll flute; (3) roll flute root.Adopt the 1st kind of processing method can shorten effective length of line of action of gear, reduce the gear meshing registration, do not reach designing requirement; Adopt the 2nd or 3 kind of processing method can have a strong impact on projected life of gear.
Summary of the invention
The object of the present invention is to provide a kind of gear hobbing processing technology of axial modification, shortcomings such as this gear hobbing processing technology can overcome traditional gear hobbing processing technology existing tooth root has step when the big axial modification of processing, effective case depth is not enough and tooth face hardness is not enough can satisfy modern advanced design of gears requirement.
According to technical scheme provided by the invention, the gear hobbing processing technology of axial modification comprises:
A, by the requirement of gear hobbing drawing, utilize gear-hobbing machine the gear gear hobbing to be machined to the test point A or the test point D of the facewidth both ends of the surface of this gear, wherein, test point A is positioned at the intersection point of the reference circle H of the intersection of an end face E of the flank of tooth F of formative gear groove and gear and gear, and test point D is positioned at the intersection point of the reference circle H of the intersection of another end face G of the flank of tooth F of formative gear groove and gear and gear;
B, with the actual spiral angle of CB line and gear, gear-hobbing machine parameter, calculate the angle t of differential hanging gear according to the gear-hobbing machine differential attachment; Wherein, C is corresponding to the mathematical point after the end face G correction of the flank shape of test point D place, the beginning correction of the flank shape point of B for setting from test point A to the line of test point D; Actual spiral angle is
And select for use with the attenuate trend of transverse tooth thickness
Sign, x1 is the profiling quantity of mathematical point C, b1 arrives distance corresponding to test point D place end face G for beginning correction of the flank shape point B, the CB line be on the flank of tooth reference circle H along a radical theory line of teeth directional direction; B2 among the figure is a facewidth length.
C, unclamp differential hanging gear, dial change gear angle t, differential during with simulation gear hobbing processing low pitch angle gear, the mathematical point C after the end face correction of the flank shape goes to beginning correction of the flank shape point B then, perhaps from beginning the mathematical point C after correction of the flank shape point B goes to the end face correction of the flank shape.
Repeating step b and step c, gear hobbing processes other correction of the flank shape points of drawing requirement.
This method can realize with manually dialling differential attachment (being differential hanging gear) on general hobbing machine, also can realize with the method control differential attachment (being differential hanging gear) of numerical control, but basic principle all be the same by the repacking gear-hobbing machine.
Advantage of the present invention is: for the gear of big relatively correction of the flank shape, traditional gear hobbing technology just routinely hobbing method is rolled into the common normal requirement, directly grinds the requirement (axial modification) of drawing during then to roll flute again, thereby mentions manufacturing deficiency above causing.And this technology after adopt improving when being gear hobbing with regard to axial modification, big correction of the flank shape part gear hobbing in advance at teeth directional machines away some surpluses (x1), reduced the roll flute surplus at this position, thereby avoided the defective that traditional handicraft occurred behind the roll flute, well reach the requirement of design of gears: teeth directional has reached the drawing requirement, tooth root does not produce boss yet, and also relatively evenly, effective case depth and tooth face hardness all meet the gear industry standard to the tooth face hardness difference.
Description of drawings
Fig. 1 is the gear hobbing processing schematic diagram of axial modification gear.
Fig. 2 is that a modulus is 10, and the number of teeth is the specific requirement of the gear hobbing drawing of 20 pinion.
Fig. 3 is the three-dimensional reference diagram of axial modification.
The specific embodiment
The gear hobbing processing technology of axial modification comprises:
A, by the requirement of gear hobbing drawing, by the requirement of gear hobbing drawing with the external diameter gear hobbing of wheel blank difference or surpass and differ from a segment distance on the common normal of gear; Utilize gear-hobbing machine the gear gear hobbing to be machined to the test point A or the test point D of the facewidth both ends of the surface of this gear again, wherein, test point A is positioned at the intersection point of the reference circle H of the intersection of an end face E of the flank of tooth F of formative gear groove and gear and gear, and test point D is positioned at the intersection point of the reference circle H of the intersection of another end face G of the flank of tooth F of formative gear groove and gear and gear;
B, with the actual spiral angle of CB line and gear, gear-hobbing machine parameter, calculate the angle t of differential hanging gear according to the gear-hobbing machine differential attachment; Wherein, C is corresponding to the mathematical point after the end face G correction of the flank shape of test point D place, the beginning correction of the flank shape point of B for setting from test point A to the line of test point D;
The helixangle of CB line reality
RealCalculate as follows:
In the formula (I), β is known gear helical angle in the processing drawing;
Select sign for use with transverse tooth thickness attenuate trend, x1 is the profiling quantity of a certain theoretical correction of the flank shape point C in the drawing, b1 be between the facewidth certain at the beginning correction of the flank shape point B to the distance of theoretical correction of the flank shape point C place end face.The CB line is that reference circle is along a radical theory line of teeth directional direction on the wheel flank of tooth, and in fact this root line is the space three-dimensional line, but for convenience, on the engineering it has been reduced to the two-dimensional curve of not considering the actual spiral angle influence;
C, unclamp differential hanging gear, dial change gear angle t and (stir differential attachment, make differential attachment be kept at an angle t), differential during with simulation gear hobbing processing low pitch angle gear, mathematical point C after the end face correction of the flank shape goes to certain the correction of the flank shape point B at the beginning between the facewidth then, perhaps from the mathematical point C after correction of the flank shape point B goes to the end face correction of the flank shape at the beginning between the facewidth certain.
Also have other correction of the flank shape point as the centre, repeating step b～c rolls out other correction of the flank shape point.
The rest may be inferred, can also process the axial modification of gear other end, until reaching the gear hobbing requirement.
Be 10 with a modulus now, the number of teeth is that 20 pinion is that example is illustrated, and the drawing axial modification as shown in Figure 2.Drawing all has the requirement of correction of the flank shape from A point and D point, especially at D point profiling quantity to 0.18～0.30mm.Monolateral stock removal about 0.2～0.3 stays the boss amount of mill hobboing cutter will arrive 0.45.Now as follows to C2 point correction of the flank shape gear hobbing step:
1, be rolled on the common normal by the requirement of gear hobbing drawing poor;
2, go to the D point from the A point, unclamp differential hanging gear, dial the certain angle of change gear, make gear teeth surface helix angle
Approximate 10 ' (atan ((0.18+0.30)/2/80).(for finished size by the quality inspection personnel passed examination, general feed is calculated by middle difference, process but all be partial to conservative going so that reprocess, below the result as can be seen) go to the C2 point then, make the displacement of C2 point reach the requirement of drawing;
3, use the same method and roll out the correction of the flank shape C1 point that A is ordered, finally reach the drawing requirement.
Said gear according to novel gear hobbing processes of the present invention after, carry out conventional roll flute processing again.Through Integrated Checkout, not only teeth directional has reached the drawing requirement, and tooth root do not produce boss yet, and monodentate surface hardness difference also relatively evenly, effective case depth and big chamfered edge place tooth face hardness all meet the gear industry standard, thereby have overcome traditional existing shortcoming of gear hobbing technology.The method has been applied in the actual production at present, has produced extraordinary economic benefit.
Claims (2)
1, a kind of gear hobbing processing technology of axial modification comprises:
A, by the requirement of gear hobbing drawing, utilize gear-hobbing machine the gear gear hobbing to be machined to first test point (A) or second test point (D) of the facewidth both ends of the surface of this gear, wherein, the flank of tooth (F) that first test point (A) is positioned at the formative gear groove and the intersection of an end face (E) of gear and the intersection point of the reference circle (H) of gear, second test point (D) are positioned at the intersection point of the reference circle (H) of the intersection of another end face (G) of the flank of tooth (F) of formative gear groove and gear and gear;
B, with the actual spiral angle of Molded Line (CB) and gear, gear-hobbing machine parameter, calculate the angle (t) of differential hanging gear according to the gear-hobbing machine differential attachment; C point in the Molded Line (CB) is corresponding to the mathematical point (C) after second test point (D) place end face (G) correction of the flank shape, the correction of the flank shape point (B) of the B point in the Molded Line (CB) for setting to the line of second test point (D) since first test point (A); Actual spiral angle be β ±
β,
β=atan (x1/b1), and select for use with the attenuate trend of transverse tooth thickness
The sign of β, x1 is the profiling quantity of mathematical point (C), and b1 is for beginning correction of the flank shape point (B) to the distance corresponding to second test point (D) place end face (G), and Molded Line (CB) is the radical theory line of reference circle on the flank of tooth (H) along the teeth directional direction;
C, unclamp differential hanging gear, dial change gear angle (t), differential during with simulation gear hobbing processing low pitch angle gear, the mathematical point (C) after the end face correction of the flank shape is gone to beginning correction of the flank shape point (B) then, perhaps goes to mathematical point (C) after the end face correction of the flank shape from beginning correction of the flank shape point (B).
2, the gear hobbing processing technology of axial modification as claimed in claim 1 is characterized in that: repeating step b and step c, gear hobbing processes other correction of the flank shape points of drawing requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100239775A CN100537097C (en) | 2007-07-02 | 2007-07-02 | Tooth direction shaping gear hobbing processing technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100239775A CN100537097C (en) | 2007-07-02 | 2007-07-02 | Tooth direction shaping gear hobbing processing technique |
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| CN101085480A CN101085480A (en) | 2007-12-12 |
| CN100537097C true CN100537097C (en) | 2009-09-09 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218572B (en) * | 2011-05-31 | 2012-12-05 | 中国航空动力机械研究所 | Shaping method and manufacturing method for involute straight tooth planetary transmission gear |
| CN103846507B (en) * | 2012-12-04 | 2017-01-25 | 中车戚墅堰机车车辆工艺研究所有限公司 | Hobbing processing method of gear |
| CN104148908B (en) * | 2014-07-03 | 2017-01-04 | 宁夏天地奔牛实业集团有限公司 | A kind of method adjusting Klingelnberg bevel pinion shaft contact area |
| CN104653749B (en) * | 2014-12-31 | 2017-05-24 | 中车戚墅堰机车车辆工艺研究所有限公司 | Gear with large tooth lead modification quantity and processing method thereof |
| CN104565289B (en) * | 2014-12-31 | 2017-05-24 | 中车戚墅堰机车车辆工艺研究所有限公司 | Design method of large axial modification amount gear and large axial modification amount gear |
| CN207681643U (en) * | 2016-10-14 | 2018-08-03 | 沈阳精力传动设备有限公司 | The mould wheel of involute gear tooth root correction of the flank shape |
| CN109365888A (en) * | 2018-11-06 | 2019-02-22 | 广东坚美铝型材厂（集团）有限公司 | It is a kind of for producing the hobbing machine equipment of heat-insulation aluminum section |
| CN111975131B (en) * | 2020-07-23 | 2023-04-25 | 湖南中大创远数控装备有限公司 | Gear end shaping method for processing spiral bevel gear based on non-generating method |
| CN115034003B (en) * | 2022-05-25 | 2023-05-09 | 益阳康益机械发展有限公司 | Profiling servo tooth direction shape modifying mechanism based on gear hobbing processing and mathematical model thereof |
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