CN85102760B - Electrochemical modification of harmonic gear - Google Patents
Electrochemical modification of harmonic gear Download PDFInfo
- Publication number
- CN85102760B CN85102760B CN85102760A CN85102760A CN85102760B CN 85102760 B CN85102760 B CN 85102760B CN 85102760 A CN85102760 A CN 85102760A CN 85102760 A CN85102760 A CN 85102760A CN 85102760 B CN85102760 B CN 85102760B
- Authority
- CN
- China
- Prior art keywords
- gear
- tooth
- flexbile gear
- harmonic
- modification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- 238000012986 modification Methods 0.000 title abstract description 6
- 230000004048 modification Effects 0.000 title abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000008151 electrolyte solution Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005498 polishing Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 238000012937 correction Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Landscapes
- Gears, Cams (AREA)
- Retarders (AREA)
Abstract
The process adopts the electrolytic polishing principle to carry out axial modification and tooth profile modification on the harmonic gear. A plate-like annular cathode is used. The gear (flexible gear or steel gear) tooth is selectively dissolved by anode to achieve the required shape. When the plate-shaped annular cathode (or the workpiece) is adopted for rotation, the effect is optimal. The smooth finish of the tooth surface of the harmonic gear subjected to shape modification can be improved by 1-2 levels, and interference is reduced. The transmission efficiency can be improved by 5 to 10 percent.
Description
The present invention relates to gear, especially the electrochemical trimming method and the device of harmonic gear.
Harmonic Gears, because it has simple in structurely, in light weight, transmitting ratio is big, characteristics such as supporting capacity height progressively are applied.But one of subject matter that exists is that transmission efficiency is low at present.Its reason has two aspects, and when flexbile gear deformed under the producer effect on the one hand, the deflection of tooth was inconsistent.Learn that according to harmonic gear data calculated and experiment conclusion the tooth that deflection is little is prone to tooth top interferes, and rotational efficienty is reduced.
Be owing to adopted approximate profile of tooth on the other hand.More generally adopt at present the approximate profile of tooth of involute profile as Harmonic Gears.Tooth error also makes Harmonic Gears interfere.Burr that produces in the mechanical workout or the like factor has all been aggravated the wearing and tearing of tooth in addition.
Still can not realize both at home and abroad at present the harmonic gear tooth is carried out correction of the flank shape.Just adopt the means of strengthening running-in, sufficient lubrication to solve.But effect is also not obvious, and to the gear of 7～8 class precisions commonly used, transmission efficiency also has only between 75%～80%.Thereby limited its use.For overcoming the above problems, we work out following terms of settlement:
1. electrolytic polishing principle is used for gear modification.Flexbile gear (or just wheel or simultaneously to flexbile gear, just wheel) is carried out axial modification (accomplishing cydariform), tooth top tip relief.Fig. 1, Fig. 2, Fig. 3 are respectively profile of tooth direction, the teeth directional direction of flexbile gear tooth in the Harmonic Gears, the partial view of tooth top direction.Solid line is a shape before the correction of the flank shape, and dotted line is shape after the correction of the flank shape (having done exaggerative processing among the figure).Purpose is to avoid tooth top to interfere, and makes tooth load even.
2. adopt electrolytic polishing principle to remove the burr that mechanical workout produces, improve flank of tooth smooth finish.Purpose is to reduce frictional coefficient, reduces wear, improves transmission efficiency.
With the correction of the flank shape of harmonic gear flexbile gear is example.
Fig. 4 is the setting drawing of flexbile gear correction of the flank shape.With the corresponding installation one tabular hollow cathode 10 in tooth position (13 indication positions among the figure) on the flexbile gear 6, ring inner surface and flexbile gear tooth top are at a distance of 5～8 millimeters, and ring is high to be equated with the facewidth.Can weld with thick 1～2 millimeter stainless steel plate.Also can adopt lathe turning to form.Flexbile gear connects dc power anode by axle 7, bearing 5, copper sheet 4.Tabular hollow cathode 10 connects dc power cathode by stainless steel conductive pole 1.Then this device is placed on dense H
2SO
4With dense H
3PO
4(volume ratio is 1: 1) electropolishing in the mixed solution.Fig. 5 a is electric force lines distribution figure between the corresponding tabular hollow cathode of teeth directional direction flexbile gear tooth.Fig. 5 b is the electric force lines distribution figure (Fig. 5 a and b are recorded by the electric field simulation experiment) of profile of tooth direction.As shown in Figure 5, tooth two ends power line is more intensive than the middle part, and the tooth top power line is more intensive than the flank of tooth.According to the anode dissolution principle, the intensive place of power line, removal speed is fast.Thereby can form the shape of dotted line among Fig. 5.Be heated to 65 ℃～75 ℃ at electrolytic solution, current density be 50 amperes/(decimetre)
2, after about 3～5 minutes of time, can obtain to polish preferably the correction of the flank shape effect.Simultaneously, the burr after the mechanical workout can all be removed totally.
For the error in geometrical form that prevents tabular hollow cathode influences the correction of the flank shape precision, workpiece is made rotary type by Fig. 4 device.The rotating speed revolution that flexbile gear changes with per minute 10～15 by axle 7 bearings, 5 usefulness motors (or passing through speed reduction unit).2 are location, insulcrete among the figure, and the useable glass steel is done.8 is hold-down nut.Flexbile gear compresses by nut 9.11 is sealing plate, in case solution enters the flexbile gear inner chamber.12 be sealing plate thrust screw.14 is insulation layer, and the useable glass silk braid is contained on the conductive pole.
Effect
1. can make flank of tooth smooth finish improve 1～2 grade.Remove mechanical machined burrs.
2. teeth directional can be accomplished " drum " shape, and tooth top can tip relief.Profiling quantity can be controlled with hollow cathode shape (for example adopting cylindrical or conical) and pole clearance.
3. transmission efficiency can improve 5～10%.
Claims (2)
1, harmonic gear electrochemical trimming method is characterized in that, at dense H
2SO
4With dense H
3PO
4(volume ratio is 1: 1) carries out electropolishing in the mixed electrolytic solution, and electrolyte temperature is 65 ℃～75 ℃, current density be 50 amperes/(decimetre)
2, the time is 3 minutes, the workpiece velocity of rotation is per minute 10～15 minutes.
2, implement the device that the described method of claim 1 is used, it is characterized in that, corresponding installation one tabular hollow cathode 10 with the tooth position on the flexbile gear 6, ring inner surface and flexbile gear tooth top are at a distance of 5～8 millimeters, and ring is high to be equated with the facewidth; Flexbile gear connects dc power anode by axle 7, bearing 5, copper sheet 4; Tabular hollow cathode 10 connects dc power cathode by stainless steel conductive pole 1, the rotating speed revolution that flexbile gear changes with per minute 10～15 by axle 7 bearings, 5 usefulness motors (or passing through speed reduction unit).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85102760A CN85102760B (en) | 1985-04-01 | 1985-04-01 | Electrochemical modification of harmonic gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85102760A CN85102760B (en) | 1985-04-01 | 1985-04-01 | Electrochemical modification of harmonic gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102760A CN85102760A (en) | 1986-08-06 |
| CN85102760B true CN85102760B (en) | 1988-08-24 |
Family
ID=4792737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85102760A Expired CN85102760B (en) | 1985-04-01 | 1985-04-01 | Electrochemical modification of harmonic gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85102760B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5774825B2 (en) | 2010-08-19 | 2015-09-09 | ソニー株式会社 | Three-dimensional modeling apparatus and manufacturing method of modeled object |
| CN103014825A (en) * | 2012-12-11 | 2013-04-03 | 傅本友 | A Method for Reducing or Removing Hanging Copper at Orifice |
-
1985
- 1985-04-01 CN CN85102760A patent/CN85102760B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85102760A (en) | 1986-08-06 |
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| SE01 | Entry into force of request for substantive examination | ||
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| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |