CN109382638A - A kind of processing technology improving the accuracy of gear - Google Patents
A kind of processing technology improving the accuracy of gear Download PDFInfo
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- CN109382638A CN109382638A CN201811602686.6A CN201811602686A CN109382638A CN 109382638 A CN109382638 A CN 109382638A CN 201811602686 A CN201811602686 A CN 201811602686A CN 109382638 A CN109382638 A CN 109382638A
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- gear
- face
- inner hole
- large end
- accuracy
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
- Gear Processing (AREA)
Abstract
The invention belongs to form of gear tooth processing technique fields, specifically disclose a kind of processing technology for improving the accuracy of gear, it is finished after roughing, gear blank semifinishing, tooth Profile Machining and heat including gear blank, the large end face of half smart car end face when gear blank semifinishing, middle gear stays the step of 0.1-0.2mm high；Tooth Profile Machining includes gear shaping, gear hobbing and roll flute, and roll flute is positioned centered on the inner hole of gear blank when processing, using large end face as axially position, using the step on semifinishing large end face as radial positioning；Smart car inner hole and large end face, remove the operation allowance of inner hole and the step of large end face when finishing after heat.This programme increases the step of 0.1-0.2mm high in the large end face of gear blank, using this step as radial positioning when roll flute, cooperate inner hole centralized positioning and large end face axially position, positioning end face is too small when solving roll flute, gear grinding stress is unstable, turns round the problem of poor rigidity, it avoids generating concave tooth form, promotes the accuracy of gear after grinding.
Description
Technical field
The invention belongs to form of gear tooth processing technique fields, specifically disclose a kind of processing technology for improving the accuracy of gear.
Background technique
Gear is the machine components that can be intermeshed passing movement and power with teeth on wheel rim, and gear drive is achievable to be subtracted
The functions such as speed, speedup, deflecting.For Gear Processing, tooth Profile Machining is main process, and roll flute is form of gear tooth processing
A kind of important method is widely used processing method in current tooth Profile Machining, but when using gear-grinding process processing gear,
There is also many problems.
In roll flute processing, gear usually makees positioning datum with inner hole and end face, i.e., fixed with inner hole of workpiece and end face joint
Position determines gear centre and axial position, and using the clamping mode towards positioning end face.The end face of gear be divided into small end face and
Large end face, small end face refer to the end face of wheel hub, and large end face refers to the end face of wheel rim.Since when roll flute is processed, grinding force is very big,
The wheel rim of gear is at grinding, and deformation is very big when grinding.If large end face is as positioning end face, after recoverable force, big end
Face will appear the phenomenon that falling in.Therefore usually use small end face as positioning end face.
However be that positioning end face can make positioning end face too small with small end face, grinding stress is unstable, and gear itself returns
Turn poor rigidity, under the action of grinding force, biggish deformation can be generated, causes gear to generate flank concave phenomenon, i.e., after roll flute
The form of gear tooth among there are recessed amounts at position.This phenomenon shows more prominent on few number of teeth spur gear.In actual use,
So that the accuracy of gear reduces, transmission stability is poor, and gearing noise is big, has seriously affected the usability of gear for the generation of concave tooth form
Energy.Therefore the generation of this concave tooth form should strongly be avoided.
Summary of the invention
The purpose of the present invention is providing a kind of processing technology for improving the accuracy of gear, and end face mistake is positioned when solving roll flute
Small, gear grinding stress is unstable, turns round poor rigidity, leads to the problem of concave tooth form so as to cause accuracy of gear reduction.
In order to achieve the above object, base case of the invention are as follows: a kind of processing technology for improving the accuracy of gear, including such as
Lower step:
(1) gear blank roughing: operation allowance 2-3mm is stayed in inner hole, outer circle and the end face of rough turn gear blank；
(2) gear blank semifinishing: the inner hole of half smart car gear blank, 20 ° of two end chamfer of inner hole stay operation allowance 0.2-0.5mm,
The large end face of half smart car end face, middle gear stays the step of 0.1mm high；
(3) tooth Profile Machining: including gear shaping, gear hobbing and roll flute, 1) gear shaping, stays shaving operation allowance 0.01-0.03mm, full tooth
Height deepens 0.1-0.3mm；2) gear hobbing: rolling gear wheel；3) it is positioned centered on the inner hole of gear blank when roll flute is processed, is with large end face
Axially position, using the step on semifinishing large end face as radial positioning；
(4) it finishes after heat: first gear blank being heat-treated, heat treatment includes carburizing, quenching and tempering, then in smart car
Hole and large end face remove the operation allowance of inner hole and the step of large end face.
The beneficial effect of this base case is:
1, the large end face of gear blank is increased the step of 0.1-0.2mm high, roll flute processing in gear blank semifinishing by this programme
When using this step as radial positioning, while being positioned centered on inner hole, using large end face as axially position, such joint is fixed
It is too small to position end face when solving roll flute for position when small end face, gear grinding stress is unstable, turns round the problem of poor rigidity, protects
Stress and rigidity when card grinding avoid generating concave tooth form, promote the accuracy of gear after grinding, guarantee product quality, improve
Product qualification rate.
2, in step (3), there are the operation allowances of certain size for inner hole and end face to gear blank, and finish after heat
When ability removing step surplus, on the one hand, the operation allowance that needs are cut has been determined, ensure that the consistency of product, on the other hand,
Avoid tooth Profile Machining in the process because the influence of grinding force, bore both ends and large end face deform.
Further, the outer diameter coaxiality error that inner hole and outer circle are controlled in step (2), during smart car is less than 0.40mm.
If gear blank inner hole and the coaxiality error of outer circle are too big, gear blank discontinuity during tooth Profile Machining is not only easy to make
It is unstable at mandrel stress, easy to wear, service life reduction, and also tooth Profile Machining error is big, can reduce the accuracy of gear.
Further, in step (4), when being finished after heat treatment, by inner hole and large end face simultaneous processing, through a step
Turning removes the operation allowance of inner hole and the step of large end face simultaneously.By inner hole and large end face simultaneous processing when being finished after heat,
It ensure that the consistency of product, while reducing process, reduce the working time, improve working efficiency.
Further, in step (3), Set and Positioning is carried out to gear blank using grinding jig when roll flute is processed.Using the grinding jig
It is used in conjunction with each other with the gear blank after semifinishing.
Further, in step (3), in tooth Profile Machining, check that large end face is not more than 0.04mm to the circle bounce of inner hole.It protects
It demonstrate,proves fixture and gear blank is positioned into clamping.
It further, further include cutting out splined hole in inner hole pull-up in step (3).Gear in hole of the production with spline
When, before tooth Profile Machining, first splined hole is made, it is circumferentially positioned to gear blank progress with splined hole, avoid tooth Profile Machining
Gear gear blank rotates in the process, and then guarantees the stress and rigidity when gear grinding, promotes the accuracy of gear.
Detailed description of the invention
Fig. 1 is the cross-sectional view of one middle gear gear blank of the embodiment of the present invention；
Fig. 2 is the cross-sectional view of grinding jig adopted in embodiment 1 of the present invention.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description include: firm banking 1, pillar 2, threaded interior hole 21, mandrel 3, thread segment 31,
Screw 32, the first pallet 4, rounded bottom surface 41, annular protrusion 42, step 43, arc fixture block 5, brute spring 6, mobile base 7,
Second pallet 8, taper faced washer 9, spheric washer 10, elastic washer 11, fixture nut 12, expansion set 13, gear blank 14.
Embodiment one:
A kind of processing technology improving the accuracy of gear, includes the following steps:
(1) gear blank roughing: operation allowance 2mm is stayed in inner hole, outer circle and the end face of rough turn gear blank；
(2) gear blank semifinishing: the inner hole of half smart car gear blank, 20 ° of two end chamfer of inner hole stay operation allowance 0.2mm, half essence
Face work checks during half smart car as shown in Figure 1, the large end face of its middle gear stays the step A of 0.1mm high and controls inner hole
It is less than 0.40mm with the outer diameter coaxiality error of outer circle；
(3) tooth Profile Machining: including gear shaping, gear hobbing and roll flute, specific steps are as follows:
1) gear shaping, stays shaving operation allowance 0.01mm, and fully teeth height deepens 0.1mm；2) gear hobbing: rolling gear wheel；3) roll flute, such as
Shown in Fig. 2, Set and Positioning is carried out to gear blank using grinding jig, is positioned centered on the inner hole of gear blank, is axial fixed with large end face
Position, using the step A on semifinishing large end face as radial positioning；Meanwhile checking that end face is not more than the circle bounce of inner hole
0.04mm。
(4) it finishes after heat: first gear blank being heat-treated, heat treatment includes carburizing, quenching and tempering, then in smart car
Hole and large end face remove the operation allowance of inner hole, the operation allowance and step A of large end face through a step turning simultaneously.
The large end face of gear blank is increased the step A of 0.1mm high, when roll flute is processed in gear blank semifinishing by the present embodiment
Using this step A as radial positioning, while being positioned centered on inner hole, using large end face as axially position, such alignment by union,
Too small to position end face when small end face when solving roll flute, gear grinding stress is unstable, turns round the problem of poor rigidity, guarantees mill
Stress and rigidity when cutting avoid generating concave tooth form, promote the accuracy of gear after grinding, guarantee product quality, improve production
Product qualification rate.
In addition, there are the operation allowances of certain size for inner hole and end face to gear blank, and after heat in step (3)
Ability removing step surplus when finishing, on the one hand, the operation allowance that needs are cut has been determined, ensure that the consistency of product, separately
On the one hand, avoid tooth Profile Machining in the process because the influence of grinding force, bore both ends and large end face deform.
As shown in Fig. 2, the grinding jig used in the present embodiment for, it is a kind of for gear grinding processing grinding jig, including
Firm banking 1 and mobile base 7, firm banking 1 are equipped with pillar 2, and pillar 2 is equipped with coaxial mandrel 3, the diameter of pillar 2
Greater than the diameter of mandrel 3, pillar 2 is equipped with the first pallet 4, and the first pallet 4 is in " Qian " font, including rounded bottom surface 41 and annular
Protrusion 42, annular protrusion 42 are equipped with step 43, specifically, the height of step 43 is 0.1mm.Mobile base 7 is equipped with and the
One pallet, 4 structure is identical and symmetrical second pallet 8, the second pallet 8 are equipped with 9 He of taper faced washer towards the side of the first pallet 4
Spheric washer 10, the spherical surface of spheric washer 10 and the inside conical surface of taper faced washer 9 are adjacent；The end of mandrel 3 is equipped with thread segment 31,
Mobile base 7 is set on thread segment 31, and thread segment 31 is additionally provided with the fixture nut 12 being threadedly coupled with it.First pallet 4
Rounded bottom surface 41 is equipped with a pair of symmetrical and the identical arc fixture block 5 of structure, arc fixture block 5 and is slidably connected with rounded bottom surface 41,
Specifically, sliding slot can be arranged on rounded bottom surface 41, the bottom end of arc fixture block 5 is slidably connected in sliding slot；Arc fixture block 5 and ring
Brute spring 6 is equipped between shape protrusion 42；Specifically, for the ease of the automated exchanged cutter of 14 wheel hub of gear blank, the inner circle of arc fixture block 5
Face is taper.Elastic washer 11 is equipped between second pallet 8 and mobile base 7.When axial end face bounce occurs for gear blank 14, bullet
Property washer 11 can buffer stress, avoid due to the first pallet 4 and 8 position of the second pallet it is fixed after, when end face run-out, 14 end of gear blank
Face deforms.It is arranged with expansion set 13 in mandrel 3, does not need replacement mandrel 3 usually, can the present apparatus is capable of clamping in difference
The gear of diameter；The fit clearance for reducing inner hole Yu mandrel 3 simultaneously avoids process middle gear from occurring eccentric, influences roll flute and add
The craft precision of work.Mandrel 3 and pillar 2 is are detachably connected, specifically, 2 upper end of pillar is equipped with threaded interior hole 21, mandrel 3
Lower end is fixedly connected with screw 32, and screw 32 is threaded in threaded interior hole 21, and mandrel 3 can be mounted on pillar 2, this
Sample is easily installed the mandrel 3 of different size, and has the advantages that structure is simple, at low cost and easy to adjust.
Embodiment two:
A kind of processing technology improving the accuracy of gear, includes the following steps:
(1) gear blank roughing: operation allowance 3mm is stayed in inner hole, outer circle and the end face of rough turn gear blank；
(2) gear blank semifinishing: the inner hole of half smart car gear blank, 20 ° of two end chamfer of inner hole stay operation allowance 0.5mm, half essence
Face work, the large end face of middle gear stay the step of 0.2mm high, check and control the outer diameter of inner hole and outer circle during half smart car
Coaxiality error is less than 0.40mm；
(3) tooth Profile Machining: including gear shaping, gear hobbing and roll flute, specific steps are as follows:
1) gear shaping, stays shaving operation allowance 0.03mm, and fully teeth height deepens 0.3mm；2) gear hobbing: rolling gear wheel；3) roll flute, such as
Shown in Fig. 2, Set and Positioning is carried out to gear blank using grinding jig, is positioned centered on the inner hole of gear blank, is axial fixed with large end face
Position, using the step on semifinishing large end face as radial positioning；Meanwhile checking that end face is not more than the circle bounce of inner hole
0.04mm。
(4) it finishes after heat: first gear blank being heat-treated, heat treatment includes carburizing, quenching and tempering, then in smart car
Hole and large end face remove the operation allowance of inner hole, the operation allowance and step of large end face through a step turning simultaneously.
Embodiment three:
The present embodiment and the difference of embodiment one are only that: further including cutting out splined hole in inner hole pull-up in step (3).
The Gearmaking Technology of the present embodiment is suitable for the preparation processing of the gear with splined hole, has spline in production
Hole gear when, before tooth Profile Machining, first splined hole is made, with splined hole to gear blank carry out it is circumferentially positioned, keep away
Gear gear blank rotates during exempting from tooth Profile Machining, and then guarantees the stress and rigidity when gear grinding, promotes the accuracy of gear.
What has been described above is only an embodiment of the present invention, and the common sense such as well known specific structure and characteristic are not made herein in scheme
Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these also should be considered as protection scope of the present invention, these all will not influence what the present invention was implemented
Effect and patent practicability.
Claims (6)
1. a kind of processing technology for improving the accuracy of gear, characterized by the following steps:
(1) gear blank roughing: operation allowance 2-3mm is stayed in inner hole, outer circle and the end face of rough turn gear blank；
(2) gear blank semifinishing: the inner hole of half smart car gear blank, 20 ° of two end chamfer of inner hole stay operation allowance 0.2-0.5mm, half essence
The large end face of face work, middle gear stays the step of 0.1-0.2mm high；
(3) tooth Profile Machining: including gear shaping, gear hobbing and roll flute, 1) gear shaping, stays shaving operation allowance 0.01-0.03mm, fully teeth height adds
Deep 0.1-0.3mm；2) gear hobbing: rolling gear wheel；3) it is positioned centered on the inner hole of gear blank when roll flute is processed, is axial with large end face
Positioning, using the step on semifinishing large end face as radial positioning；
(4) heat after finish: first gear blank is heat-treated, heat treatment include carburizing, quenching and tempering, then smart car inner hole and
Large end face removes the operation allowance of inner hole and the step of large end face.
2. a kind of processing technology for improving the accuracy of gear according to claim 1, it is characterised in that: in step (2), half essence
The outer diameter coaxiality error that inner hole and outer circle are controlled during vehicle is less than 0.40mm.
3. a kind of processing technology for improving the accuracy of gear according to claim 2, it is characterised in that: in step (4), at heat
After reason when being finished, by inner hole and large end face simultaneous processing, removed simultaneously through a step turning inner hole operation allowance and
The step of large end face.
4. a kind of processing technology for improving the accuracy of gear according to claim 3, it is characterised in that: in step (3), roll flute
Set and Positioning is carried out to gear blank using grinding jig when processing.
5. a kind of processing technology for improving the accuracy of gear according to claim 4, it is characterised in that: in step (3), in tooth
When shape is processed, check that end face is not more than 0.04mm to the circle bounce of inner hole.
6. a kind of processing technology for improving the accuracy of gear according to claim 5, it is characterised in that: in step (3), also wrap
Include broaching splined hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811602686.6A CN109382638B (en) | 2018-12-26 | 2018-12-26 | Machining process for improving gear precision |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811602686.6A CN109382638B (en) | 2018-12-26 | 2018-12-26 | Machining process for improving gear precision |
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| CN109382638A true CN109382638A (en) | 2019-02-26 |
| CN109382638B CN109382638B (en) | 2020-04-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296183A (en) * | 2019-08-03 | 2019-10-01 | 金华市宇辰粉末冶金有限公司 | A kind of bevel gear set |
| CN112091254A (en) * | 2020-08-26 | 2020-12-18 | 江西昌河航空工业有限公司 | Inner hole clamping device |
| CN112404915A (en) * | 2020-11-18 | 2021-02-26 | 成都青山实业有限责任公司 | Tooth manufacturing method of large cake-shaped disc tooth gear |
| CN117260201A (en) * | 2023-09-25 | 2023-12-22 | 广州柴油机厂股份有限公司 | Prime number helical gear processing method and gear hobbing tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357846A (en) * | 2011-10-17 | 2012-02-22 | 河南柴油机重工有限责任公司 | Press mounting clamp and press mounting method for duplex spiral gear |
| CN107234407A (en) * | 2017-08-07 | 2017-10-10 | 江阴市凯华机械制造有限公司 | Driven tooth wheel rim production technology |
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2018
- 2018-12-26 CN CN201811602686.6A patent/CN109382638B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357846A (en) * | 2011-10-17 | 2012-02-22 | 河南柴油机重工有限责任公司 | Press mounting clamp and press mounting method for duplex spiral gear |
| CN107234407A (en) * | 2017-08-07 | 2017-10-10 | 江阴市凯华机械制造有限公司 | Driven tooth wheel rim production technology |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296183A (en) * | 2019-08-03 | 2019-10-01 | 金华市宇辰粉末冶金有限公司 | A kind of bevel gear set |
| CN112091254A (en) * | 2020-08-26 | 2020-12-18 | 江西昌河航空工业有限公司 | Inner hole clamping device |
| CN112404915A (en) * | 2020-11-18 | 2021-02-26 | 成都青山实业有限责任公司 | Tooth manufacturing method of large cake-shaped disc tooth gear |
| CN117260201A (en) * | 2023-09-25 | 2023-12-22 | 广州柴油机厂股份有限公司 | Prime number helical gear processing method and gear hobbing tool |
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| Publication number | Publication date |
|---|---|
| CN109382638B (en) | 2020-04-07 |
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Denomination of invention: A machining process for improving gear accuracy Effective date of registration: 20211217 Granted publication date: 20200407 Pledgee: Bishan sub branch of Chongqing Three Gorges Bank Co.,Ltd. Pledgor: CHONGQING XINGJI GEAR Co.,Ltd. Registration number: Y2021500000070 |
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Date of cancellation: 20230206 Granted publication date: 20200407 Pledgee: Bishan sub branch of Chongqing Three Gorges Bank Co.,Ltd. Pledgor: CHONGQING XINGJI GEAR Co.,Ltd. Registration number: Y2021500000070 |
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Denomination of invention: A machining process for improving gear accuracy Effective date of registration: 20230602 Granted publication date: 20200407 Pledgee: Bishan sub branch of Chongqing Three Gorges Bank Co.,Ltd. Pledgor: CHONGQING XINGJI GEAR Co.,Ltd. Registration number: Y2023980042708 |