CN1074246A - Motor rotary shaft and manufacture method thereof - Google Patents
Motor rotary shaft and manufacture method thereof Download PDFInfo
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- CN1074246A CN1074246A CN 92100625 CN92100625A CN1074246A CN 1074246 A CN1074246 A CN 1074246A CN 92100625 CN92100625 CN 92100625 CN 92100625 A CN92100625 A CN 92100625A CN 1074246 A CN1074246 A CN 1074246A
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- rotary shaft
- motor rotary
- necked part
- layer
- fluoride
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- Manufacture Of Motors, Generators (AREA)
Abstract
Only constitute hard nitride layer by motor rotary shaft of the present invention on the necked part surface, such motor rotary shaft is with to use the situation of hard material to compare cost with regard to whole motor rotary shaft low, and is so heavy and good weather resistance arranged.Make the method for motor rotary shaft by the present invention, use fluoridation with inertia top layer on the necked part surface before the nitriding treatment, as zone of oxidation, be converted to fluoride layer, fluoride layer is protected this surface.Therefore, even fluoridizing free interval between formation and nitriding treatment on the necked part surface, this fluoride layer protection and retainer shaft neck portion surface are under favourable situation, and the result has stoped the upward formation again of zone of oxidation of its surface.
Description
The present invention relates to motor rotary shaft, it includes the necked part of the hard nitride layer of remarkable improvement performance (as weather resistance), and relates to the manufacture method of motor rotary shaft.
Usually the direct current or the AC servomotor that require to be used as topworks in the device of industrial automatic gear and the like respond with high accuracy fast to the control position of installing; also require it that enough weather resistance are arranged; to stand frequently repeatedly to start the work that shutdown and rotating change.Fig. 4 for example understands a kind of DC servo-motor that comprises this servosystem universal architecture.This servosystem 20 has the motor case 21 with left and right sidewall, and each sidewall has the supporting metal 23 in order to the necked part 22a of rotatable support steel shafts 22.Motor rotary shaft 22 has armature 24, armature coil 25, reverser 26 etc.In the face of fixing permanent magnet 27 on the casing 21 at armature 24 places, an end of rotating shaft 22 links to each other with location/velocity detector 30, and the output 22b place of its other end and speed reduction unit 29 link to each other as gear.For satisfying above-mentioned requirements, the servosystem 20 that said structure arranged need have high weather resistance with necked part 22a place that supporting metal 23 links mutually.
Thus, for improving the weather resistance of its necked part 22a, selecting for use variously has the steel of high-durability as motor rotary shaft 22.This problem with regard to having caused material cost and weight to increase.Therefore an object of the present invention is under the situation that does not increase material cost and weight, improve the weather resistance of the necked part of motor rotary shaft.
For finishing above-mentioned purpose, first main points of the present invention are the upper layer of motor rotary shaft necked part is processed into hard nitride layer, second main points of the present invention are the manufacture method of motor rotary shaft, the necked part of its shaft remains in the atmosphere of fluorine or fluoride gas and form fluorinated layer on the surface of necked part under heating state, then further remains on and form hard nitride layer in the nitride gas atmosphere under heating state on the surface of necked part.
In detail, machine shaft of the present invention constitutes hard fluoride layer at the upper layer of necked part, but not that whole machine shaft is used hard material, make machine shaft that low cost is arranged thus, so heavy and fabulous weather resistance arranged, in addition, in the manufacture method of machine shaft according to the present invention, the collar of axle at first remains in the atmosphere of fluorine or fluoride gas, under heating state, on the necked part surface, form fluorinated layer, further remain in the nitriding atmosphere, under heating state, remove the fluorinated layer of formation and the part (on the upper layer of necked part) of removing simultaneously forms hard nitride layer from necked part.In treating processes, before the nitrogenize on the surface of necked part the formation of fluorinated layer to purify and to activate simultaneously the surface of necked part, thereby be formed uniformly the nitride layer of the suitable degree of depth on the necked part surface, hard thus nitride layer will be even and intensive on thickness.
Secondly, details of the present invention will be described below.
The fluorine and the fluoride gas that are used for fluorination process of the present invention are the gas of a non-activity, as comprise that fluorine component is (as NF
3, BF
3, CF
4, HF, SF
6, F
2, NF
3) at least a N
2To corresponding reactivity of this purpose and handling property is the most desirable and suitable.
The nitridation process of manufacturing method according to the invention, motor rotary shaft (steel, as stainless steel, and be coated with except that necked part with known anti-setting agent) remains in fluorine or the fluoride gas atmosphere as above-mentioned, under heating state, as 250-400 ℃, when using NF
3The time on the surface of necked part, generate fluorinated layer, nitrogenize or carbon nitrogenize then used a kind of known nitriding gas, as ammonia.Fluorine component in fluorinated gas is (as NF
3) concentration ratio 1000-100000ppm in this way, be more preferably 20000-70000ppm, preferably 30000-50000ppm.Hold-time in fluorine or fluoride gas can be corresponding to the various steel of motor rotary shaft, size, and Heating temperature or suchlike factor are selected, normally several minutes or several ten minutes.
The course of processing of the present invention will be described in further detail.Motor rotary shaft 22 shown in Figure 4 be steel and except that necked part, covered, its necked part 22a can clean oil removing and place as shown in Figure 1 heat treatment furnace 1 again.Process furnace 1 is a kind of pit furnace, and it comprises shell 2, having heaters 3 and the inside groove 4 that is arranged on well heater 3 inboards in the shell.Gas inlet tube 5 and vapor pipe 6 are inserted in the pit furnace, gas is imported by gas inlet tube through under meter 17, valve 18 etc. from gas cylinder 15,16.The pit furnace gas inside is stirred by the fan 8 that electric motor 7 drives.Motor rotary shaft 22 is contained in the metal vessel 11 that places in the stove.The cancellation element of number in the figure 13 expression vacuum pumps and 14 expression objectionable impuritiess.The gas of fluorine or fluoride is as NF
3And N
2Mixed gas, inject stove and be heated to predetermined temperature of reaction.At 250-400 ℃ of NF
3Produce active fluorine, thus the fluorine that is eliminated and is produced at the lip-deep organic and inorganic contaminant of the necked part 22a while with at the lip-deep iron of necked part 22a, chromium matter or oxide compound such as FeO, Fe
3O
2, Cr
2O
3React, shown in following chemical formula, formation comprises component such as FeF on necked part 22a surface thus
2, FeF
3, CrF
2, CrF
4Extremely thin fluoride layer.
This reaction is converting fluoride layer to and remove the O that adsorbs on the surface, place at the lip-deep oxide skin of necked part 22a
2Be lower than in temperature that fluoride layer is stable under 600 ℃ of situations,, the absorption of oxygen on the formation of oxide compound and the metal matrix prevented when there not being oxygen.According to fluorination process, generate fluoride layer in the initial stage on the stove material surface, so fluoride layer has prevented because the possibility of using fluorine or fluoride gas that the stove material surface is damaged thereafter.Suitably handle necked part 22a with fluorine or fluoride gas and further be heated to nitriding temperature 480-700 ℃ and apply NH in this stage
3Gas or NH
3And the mixed gas of carbonaceous component (as RX gas) gas, make above-mentioned fluoride layer by hydrogen or minor amount of water reduces or broken, shown in following chemical formula, by this active metal matter being formed and exposing.
Along with having activated metallic formation, activated nitrogen atom enters metal and diffusion therein simultaneously, and the result has formed to comprise nitride such as CrN, Fe on metal matter surface
2N, Fe
3N, Fe
4The solid compounds layer (nitride layer) of N.Secondly, above-mentioned the covering of countershaft 22 suitably removed.
Habitual nitriding treatment forms and is similar to above-mentioned nitride layer, but owing to rise to the formation or the absorption of oxygen at this moment of oxide skin during the nitriding temperature from general room temperature, lower activity is arranged, so that the degree of absorption of nitrogen-atoms is low and inhomogeneous on stromal surface on stromal surface.In fact be difficult to keep NH in the stove
3The degree of uniformity that decomposes has aggravated above-mentioned ununiformity.By manufacturing processed of the present invention, provide solid-state nitride layer to eliminate the problems referred to above, nitrogen-atoms is able to evenly and apace finish in the lip-deep absorption of necked part.
The motor rotary shaft of making like this 22, wherein the upper layer of its necked part 22a comprises hard nitride layer A as shown in Figure 2, thereby good weather resistance is arranged.
Metallic substance except that steel such as aluminium, titanium also can make as motor rotary shaft and can obtain above-mentioned identical effect.
From as can be seen above-mentioned, machine shaft of the present invention constitutes hard nitride layer rather than uses hard material with regard to whole machine shaft at the upper layer of necked part, so can obtain low cost, does not weigh and have the bent axle of excellent durability so.
Therefore, bent axle of the present invention has solid-state nitride layer can reduce sliding resistance to about 1/3, can realize saving refrigerant or other similar thing thus.
In addition, as mentioned above,, implement before the nitriding treatment to fluoridize,,, be converted to this surperficial fluorinated layer of protection as oxide skin with the lip-deep lazy attitude of necked part top layer by manufacture method of the present invention.Even at interval free between the formation of necked part A fluoride layer and nitriding treatment, fluorochemical protection and retainer shaft neck portion surface are in favourable situation, and the result has prevented the recomposition of oxide skin in its surface.Fluoride layer is decomposed and removes in nitriding treatment afterwards, so that expose on the necked part surface.Because the metallic surface of exposing is activated, the nitrogen-atoms in the nitriding treatment permeates and the extended axis neck portion easily deeply and equably, is processed into the necked part upper layer intensive thus and uniformly hard nitride layer.
Fig. 1 is the sectional schematic diagram that is used for the heat treatment furnace of one embodiment of the invention,
Fig. 2 is formed on the sectional schematic diagram of the nitride layer situation on the axle journal of motor rotary shaft.
Fig. 3-4 has the sectional schematic diagram of the electric motor of motor rotary shaft separately.
Secondly, the present invention will be referred to an embodiment.
Necked part by the motor rotary shaft (150 * φ 25mm) of the stainless steel of SUS316 is cleaned with trichloroethane.The rest part of axle except that necked part that cleaned covered, and is placed in the heat treatment furnace 1 as Fig. 1, remains on to comprise 5000ppmNF
3Oxide gas atmosphere in 300 ℃ 15 minutes, then be heated to 530 ℃ and 50%NH
3+ 50%N
2Mixed gas import in the heat treatment furnace 1, implement the nitrogenize 3 hours of axle.Then, axle takes out by air cooling and from stove.The thickness of motor rotary shaft necked part nitride layer is 10-70 μ m, and the surface hardness of nitride layer to be 1000-1350Hv and this hardness be higher than in fact with the habitual resulting hardness of nitriding method.
Claims (2)
1, a kind of motor rotary shaft that necked part is arranged, the upper layer of its necked part is made for hard nitride layer.
2, a kind of method of making motor rotary shaft, comprise that the necked part that keeps motor rotary shaft is in fluorine or fluoride gas atmosphere, under heating state on the necked part surface, to form fluoride layer, then further remain in the nitriding atmosphere, under heating state on the necked part surface, to form hard nitride layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100625 CN1032263C (en) | 1992-01-06 | 1992-01-06 | Motor rotary shaft and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100625 CN1032263C (en) | 1992-01-06 | 1992-01-06 | Motor rotary shaft and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1074246A true CN1074246A (en) | 1993-07-14 |
| CN1032263C CN1032263C (en) | 1996-07-10 |
Family
ID=4938724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92100625 Expired - Fee Related CN1032263C (en) | 1992-01-06 | 1992-01-06 | Motor rotary shaft and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1032263C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523745A (en) * | 2010-09-09 | 2012-06-27 | 丰田自动车株式会社 | Method of manufacturing carburized parts |
| CN109877536A (en) * | 2019-01-28 | 2019-06-14 | 淄博友联电器有限公司 | Stretching iron pan answers bottom technique |
-
1992
- 1992-01-06 CN CN 92100625 patent/CN1032263C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523745A (en) * | 2010-09-09 | 2012-06-27 | 丰田自动车株式会社 | Method of manufacturing carburized parts |
| CN109877536A (en) * | 2019-01-28 | 2019-06-14 | 淄博友联电器有限公司 | Stretching iron pan answers bottom technique |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1032263C (en) | 1996-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: DAIDOUSANSO CO., LTD. TO: AIR AND WATER INC. |
|
| CP03 | Change of name, title or address |
Address after: Hokkaido, Sapporo, Japan Patentee after: Air Water Inc. Address before: Osaka City, Osaka of Japan Patentee before: Daidousanso Co., Ltd. |
|
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19960710 Termination date: 20110106 |