CN103084684A - Plane secondary enveloping ring surface worm gear machining method - Google Patents
Plane secondary enveloping ring surface worm gear machining method Download PDFInfo
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- CN103084684A CN103084684A CN2013100497753A CN201310049775A CN103084684A CN 103084684 A CN103084684 A CN 103084684A CN 2013100497753 A CN2013100497753 A CN 2013100497753A CN 201310049775 A CN201310049775 A CN 201310049775A CN 103084684 A CN103084684 A CN 103084684A
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- worm gear
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Abstract
The invention discloses a plane secondary enveloping ring surface worm gear machining method. An electrosparking forming principle is adopted, a worm is used as a tool electrode, a worm gear to be machined is used as a workpiece electrode, two electrodes simulate the meshing motion of worm-gears, the workpiece electrode is enabled to move radially to guarantee the accordance of a discharging gap, the tooth profile outline of the worm is copied on the worm gear to be machined constantly, and the plane secondary enveloping ring surface worm gear is finally obtained. The plane secondary enveloping ring surface worm gear machining method directly uses a primary enveloping worm to machine the worm gear, a fly-cutter or a worm gear hob no more need to be manufactured, the process route of the plane secondary enveloping ring surface worm gear is shortened, error source is reduced, and machining precision is improved.
Description
Technical field
The present invention relates to the processing method of machine components, be specifically related to a kind of plane-generated double enveloping anchor ring worm gear processing method.
Background technology
The processing of the plane-generated double enveloping anchor ring worm gear gear teeth is the general instruments such as fly cutter, hobboing cutter, muller that adopt now.The characteristics that fly cutter has is easy to manufacture, cost is low, but adopt fly cutter to add man-hour, the worm gear flank of tooth is not that envelope forms gradually, be cut into by its blade during to the rearmost position by the fly cutter feed, the formed flank of tooth has not had hollow district, be difficult for obtaining correct worm gear tooth surface, also need to carry out running-in with worm screw after cutting and grind.Adopt the hobboing cutter handling ease to obtain correct worm gear tooth surface, machining accuracy is high, and production efficiency is high, but hobboing cutter is made difficulty, and the cost of charp tool is high.And, process directly machining worm wheel of formed worm screw by first enveloped.Must go out hobboing cutter according to hobboing cutter and the method processing and manufacturing that the worm gear of processing process simulation worm and wheel meshes, then knife face after cutter tooth is ground, then the method by processing first enveloped worm screw grinds land, then cuts out worm gear with this hobboing cutter.Therefore, in processing hobboing cutter process, the hobboing cutter of processing and manufacturing can not be just the same with the worm screw that produces of first enveloped, increased machining process route and error.
Summary of the invention
The object of the present invention is to provide a kind of plane-generated double enveloping anchor ring worm gear processing method, with the simplified processing process route, reduce source of error, improve machining accuracy.
Plane-generated double enveloping anchor ring worm gear processing method of the present invention adopts electric spark galvanic corrosion processing technology, processes corresponding worm gear according to the tooth profile galvanic corrosion of worm screw, and described processing method comprises the steps:
A) worm gear to be processed is arranged on the worm gear workbench, the worm screw of first enveloped is arranged on the worm screw workbench, and worm gear and worm screw are immersed in insulated working liquid;
B) adjust the initial center distance of worm gear and worm screw and the discharging gap between worm gear outline and worm screw outline according to processing technology;
C) worm gear and worm screw are communicated with the two poles of the earth of Pulased power supply unit respectively, make worm screw become tool-electrode, worm gear becomes piece pole;
D) Pulased power supply unit work energising, produce pulse voltage between tool-electrode and piece pole, pulse voltage is worn insulated working liquid hammer between discharging gap, produce spark discharge, the TRANSIENT HIGH TEMPERATURE ablation that forms is fallen part unnecessary on piece pole, forms the shape corresponding with the tool-electrode outline; Described worm screw is driven constantly by the worm screw main shaft and rotates, and worm gear is driven with corresponding rotational speed by the worm gear workbench, forms the generating motion of worm gear and worm screw; Simultaneously, worm gear is driven towards the worm screw radial feed by the worm gear workbench, and discharging gap is remained unchanged;
E) theoretical center that equals to design worm couple to the centre-to-centre spacing of worm gear and worm screw just obtains required worm gear apart from the discharging gap sum time;
F) in above-mentioned electric spark galvanic corrosion processing, by hydraulic pump and the continuous circulating filtration insulated working of filter liquid, elimination is the galvanic corrosion product wherein.
Further, described worm gear workbench is controlled by clearance control system and is realized radial feed, described clearance control system comprises measuring unit, comparing unit, amplifying unit and performance element, described measuring unit is to restrain by voltage stabilizing to measure crest value of impulse voltage, comparing unit is crest value of impulse voltage to be compared with the magnitude of voltage of presetting obtain difference signal, amplifying unit amplifies difference signal transports to performance element, performance element is by driving executive component, the worm gear workbench is moved radially accordingly, to guarantee that discharging gap is constant.
Further, adopt that viscosity is low, the kerosene of good fluidity is as insulated working liquid.
Plane-generated double enveloping anchor ring worm gear processing method of the present invention, adopt the spark machined Forming Theory, with worm screw as tool-electrode, worm gear to be processed is as piece pole, two electrode cochlea analogy worm-gears gear motions, and make piece pole move radially to guarantee that discharging gap is consistent, and the tooth profile of worm screw constantly is replicated on the worm gear of processing, finally obtain plane-generated double enveloping anchor ring worm gear.The method of the invention is directly used the worm screw machining worm wheel of first enveloped, need not to produce fly cutter or worm gear hob again, has shortened the process route of planar double-enveloping wormwheel processing, has reduced source of error, has improved machining accuracy.
Description of drawings
Fig. 1 is enforcement schematic diagram of the present invention.
The specific embodiment
The present invention is further elaborated below in conjunction with drawings and Examples:
Plane-generated double enveloping anchor ring worm gear processing method of the present invention adopts electric spark galvanic corrosion processing technology, processes corresponding worm gear according to the tooth profile galvanic corrosion of worm screw, and described processing method comprises the steps:
A) worm gear to be processed 4 is arranged on worm gear workbench 5, the worm screw 3 of first enveloped is arranged on worm screw workbench 2, and worm gear 4 and worm screw 3 are immersed in insulated working liquid 6;
B) adjust the initial center distance of worm gear 4 and worm screw 3 and the discharging gap between worm gear 4 outlines and worm screw 3 outlines according to processing technology; Described initial center is apart from relevant with blank of worm gear size, ablation amount and discharging gap, and discharging gap is relevant with worm gear, worm screw material, insulated working liquid and pulse voltage again; Wherein discharging gap is determined according to following empirical equation:
In formula: S-discharging gap (μ m);
k
u-the constant relevant with the working solution dielectric strength;
K
R-the constant relevant with material;
W
M-individual pulse energy (J);
S
mThe mechanical clearance (μ m) of the impacts such as-consideration thermal expansion, contraction, vibration;
C) worm gear 4 and worm screw 3 are communicated with the two poles of the earth of Pulased power supply unit 1 respectively, make worm screw 3 become tool-electrode, worm gear 4 becomes piece pole; Described Pulased power supply unit 1 is the essentially identical isopulse power supply of current amplitude, can automatically keep the pulse current width to equate, guarantees consistent processing roughness;
D) Pulased power supply unit 1 work energising, produce pulse voltage between tool-electrode and piece pole, form an electric field, when the electric-field intensity in cathode surface somewhere is increased to certain value, cathode surface is with runaway electron anode high-speed motion and clash into molecule or the atom of insulated working liquid medium, make dielectric breakdown and form discharge channel, high velocity impact due to charged particle, produce spark discharge, the discharge channel temperature is raise, temperature can reach 5000 ℃, the TRANSIENT HIGH TEMPERATURE ablation that forms is fallen part unnecessary on piece pole, form the shape corresponding with the tool-electrode outline, described worm screw 3 is constantly rotated by the drive of worm screw main shaft, and worm gear 4 is driven with corresponding rotational speed by worm gear workbench 5, forms the generating motion of worm gear 4 and worm screw 3, simultaneously, worm gear 4 is driven towards worm screw 3 radial feeds by worm gear workbench 5, and discharging gap is remained unchanged,
E) theoretical center that equals to design worm couple to the centre-to-centre spacing of worm gear 4 and worm screw 3 just obtains required worm gear 4 apart from the discharging gap sum time;
F) in above-mentioned electric spark galvanic corrosion processing, by hydraulic pump 8 and the continuous circulating filtration insulated working liquid 6 of filter 9, elimination is the galvanic corrosion product wherein, described hydraulic pump 8 and filter 9 are arranged on the feed liquor pipeline of working liquid container 7, the present embodiment adopts that viscosity is low, the kerosene of good fluidity is as insulated working liquid, and working solution is as discharge channel, and discharge recovers again state of insulation after finishing, promote dishing out and discharging of galvanic corrosion product, carry out cooling to the two poles of the earth.
due to the continuous ablation of piece pole quilt, therefore in order to guarantee that discharging gap is constant, need to make the continuous feeding of piece pole, the radial direction feed speed of worm gear should equate with institute's ablation speed in principle, in fact two speed do not equate constantly, therefore modification space control system on the radial feed direction, this system regulates two electrode gaps by closed-loop feedback manner and remains unchanged, described worm gear workbench 5 is controlled by clearance control system and is realized radial feed, clearance control system comprises measuring unit, comparing unit, amplifying unit and performance element, described measuring unit is to restrain by voltage stabilizing to measure crest value of impulse voltage, comparing unit is crest value of impulse voltage to be compared with the magnitude of voltage of presetting obtain difference signal, amplifying unit amplifies difference signal transports to performance element, performance element is by driving servomotor, worm gear workbench 5 is moved radially accordingly.
Claims (3)
1. plane-generated double enveloping anchor ring worm gear processing method is characterized in that: adopt electric spark galvanic corrosion processing technology, process corresponding worm gear according to the tooth profile galvanic corrosion of worm screw, described processing method comprises the steps:
A) worm gear to be processed (4) is arranged on worm gear workbench (5), the worm screw (3) of first enveloped is arranged on worm screw workbench (2), and worm gear (4) and worm screw (3) are immersed in insulated working liquid (6);
B) adjust the initial center distance of worm gear and worm screw and the discharging gap between worm gear outline and worm screw outline according to processing technology;
C) worm gear and worm screw are communicated with the two poles of the earth of Pulased power supply unit (1) respectively, make worm screw become tool-electrode, worm gear becomes piece pole;
D) Pulased power supply unit work energising, produce pulse voltage between tool-electrode and piece pole, pulse voltage is worn insulated working liquid hammer between discharging gap, produce spark discharge, the TRANSIENT HIGH TEMPERATURE ablation that forms is fallen part unnecessary on piece pole, forms the shape corresponding with the tool-electrode outline; Described worm screw is driven constantly by the worm screw main shaft and rotates, and worm gear is driven with corresponding rotational speed by the worm gear workbench, forms the generating motion of worm gear and worm screw; Simultaneously, worm gear is driven towards the worm screw radial feed by the worm gear workbench, and discharging gap is remained unchanged;
E) theoretical center that equals to design worm couple to the centre-to-centre spacing of worm gear and worm screw just obtains required worm gear apart from the discharging gap sum time;
F) in above-mentioned electric spark galvanic corrosion processing, by hydraulic pump (8) and the continuous circulating filtration insulated working liquid of filter (9), elimination is the galvanic corrosion product wherein.
2. processing method according to claim 1, it is characterized in that: described worm gear workbench (5) is controlled by clearance control system and is realized radial feed, described clearance control system comprises measuring unit, comparing unit, amplifying unit and performance element, described measuring unit is to restrain by voltage stabilizing to measure crest value of impulse voltage, comparing unit is crest value of impulse voltage to be compared with the magnitude of voltage of presetting obtain difference signal, amplifying unit amplifies difference signal transports to performance element, performance element is by driving executive component, the worm gear workbench is moved radially accordingly, to guarantee that discharging gap is constant.
3. processing method according to claim 1 and 2, is characterized in that: adopt kerosene as insulated working liquid (6).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744158A (en) * | 2019-10-31 | 2020-02-04 | 华南理工大学 | Electrolytic finish machining method for micro-wire gear |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088142A (en) * | 1992-12-16 | 1994-06-22 | 国营江南光学仪器厂 | Generating electrospark precision machining equipment |
| JPH09216023A (en) * | 1996-02-09 | 1997-08-19 | Sumitomo Heavy Ind Ltd | Method for working roll-shaped die for form rolling and method for roll-forming gear using the same die |
| JP2000202719A (en) * | 1999-01-12 | 2000-07-25 | Shinei Seisakusho:Kk | Elecrolytic grinding device for worm wheel |
| CN101791728A (en) * | 2010-01-28 | 2010-08-04 | 哈尔滨工业大学 | Voltage detection method between non-contact poles for electrostatic induction micro electro discharge machining and circuit design thereof |
| CN102389996A (en) * | 2011-08-18 | 2012-03-28 | 武汉科技大学 | Modified double-toroid secondary enveloping toroid worm gear pair and manufacturing method thereof |
-
2013
- 2013-02-07 CN CN201310049775.3A patent/CN103084684B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088142A (en) * | 1992-12-16 | 1994-06-22 | 国营江南光学仪器厂 | Generating electrospark precision machining equipment |
| JPH09216023A (en) * | 1996-02-09 | 1997-08-19 | Sumitomo Heavy Ind Ltd | Method for working roll-shaped die for form rolling and method for roll-forming gear using the same die |
| JP2000202719A (en) * | 1999-01-12 | 2000-07-25 | Shinei Seisakusho:Kk | Elecrolytic grinding device for worm wheel |
| CN101791728A (en) * | 2010-01-28 | 2010-08-04 | 哈尔滨工业大学 | Voltage detection method between non-contact poles for electrostatic induction micro electro discharge machining and circuit design thereof |
| CN102389996A (en) * | 2011-08-18 | 2012-03-28 | 武汉科技大学 | Modified double-toroid secondary enveloping toroid worm gear pair and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744158A (en) * | 2019-10-31 | 2020-02-04 | 华南理工大学 | Electrolytic finish machining method for micro-wire gear |
| CN110744158B (en) * | 2019-10-31 | 2021-02-12 | 华南理工大学 | Electrolytic finish machining method for micro-wire gear |
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| CN103084684B (en) | 2015-04-29 |
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