CN104259462A - Technology for manufacturing gear output shaft by means of powder metallurgy - Google Patents
Technology for manufacturing gear output shaft by means of powder metallurgy Download PDFInfo
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- CN104259462A CN104259462A CN201410457868.4A CN201410457868A CN104259462A CN 104259462 A CN104259462 A CN 104259462A CN 201410457868 A CN201410457868 A CN 201410457868A CN 104259462 A CN104259462 A CN 104259462A
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Abstract
The invention discloses a technology for manufacturing a gear output shaft by means of powder metallurgy. The technology comprises the steps of conducting one-time compression molding, conducting sintering for 3.5-4 h at a temperature ranging from 670 DEG C to 1140 DEG C, conducting heat treatment for 1-3 h at a temperature ranging from 840 DEG C to 860 DEG C, conducting quenching with oil the temperature of which is lower than 60 DEG C, conducting tempering for 1-2 h at a temperature ranging from 200 DEG C to 220 DEG C, conducting grinding and conducting cleaning and oil immersion. According to the technology, green is obtained through one-time compression molding by means of a molding die, offset dimension alignment and forming are conducted at the same time during compression molding, technological processes are simplified, the surface quality of products is improved, the adverse impact of original technologies is avoided, the consumption of production materials is reduced, production efficiency is improved, and production cost is reduced.
Description
Technical field
The present invention relates to the technical field of powder metallurgy, particularly relate to the technique that a kind of powder metallurgy manufactures output shaft of gear.
Background technology
Present Powder Metallurgy Industry manufactures mostly being of the technique of output shaft of gear, stirs-be shaped-sintering-packaging.In this kind of technique, numerous company is in order to reduce cost, employing is simplified formula or is reduced the modes such as technique, provides cost savings although simplify formula, ensures can lack properties of product quality, can only use for the product of some least significant ends, and in this kind of technique during machined for must with turning oil processing, easily cause part surface coverage one deck putty after heat treatment, affect outward appearance, must brush to remove, causing the increase of cost of labor.
Summary of the invention
In view of this, the invention provides the technique that a kind of powder metallurgy manufactures output shaft of gear, this technique is comparatively simple, and production efficiency is high, and product quality obtained is thus high.
Powder metallurgy manufactures a technique for output shaft of gear, comprises the following steps:
(1) raw embryo is obtained by once molding formed for the iron-based powder use mould through stirring;
(2) carry out sintering 3.5 ~ 4h by described raw embryo 670 ~ 1140 DEG C of temperature, obtain semi-finished product;
(3) described semi-finished product are heat-treated 1 ~ 3 hour at 670 ~ 1140 DEG C of temperature, the oil that then serviceability temperature is no more than 60 DEG C carries out quenching until it reaches predetermined hardness, and then tempering 1 ~ 2 hour at 200 ~ 220 DEG C, obtains thick product;
(4) by described thick product according to by first to after order carry out grinding and cleaning oil immersion.
Be understandable that, term " thick product " refers to not reach comparatively greatly predetermined particle diameter and product to be ground through Overheating Treatment, quenching and tempering process and its granularity.Finished product is after thick product makes its granularity reach pre-top particle diameter through grinding.
Wherein, in compression molding described in step (1), off normal size is simultaneously shaping.Off normal size is simultaneously shaping reduces follow-up milling off normal step, avoid part need add when milling off normal turning oil cause heat treatment after product surface cover one deck putty, cause product by dirtyly cannot removing of carrying after vibro-grinding, strict for auto parts appearance requirement, also must increase personnel and brush.What deserves to be explained is, in the present invention, the shaping enforcement simultaneously of off normal size does not rely on the mould of ad hoc structure, and namely any one mould meeting this shape of product well-known to those skilled in the art all can implement this programme.
Wherein, before step (2) to rear and step (3), also comprise recessing, be specially and life embryo is processed C catching groove footpath and O type annular groove footpath.Other operating condition as recessing is technology known in the field.
Wherein, sinter described in step (2) and specifically comprise first stage sintering, second stage sintering, phase III sintering, fourth stage sintering, five-stage sintering and the 6th stage sintering, the temperature of described first stage sintering is 670 ~ 690 DEG C, the temperature of described second stage sintering is 770 ~ 790 DEG C, the temperature of described phase III sintering is 940 ~ 960 DEG C, the temperature of described fourth stage sintering is 1090 ~ 1110 DEG C, the temperature of five-stage sintering is 1120 ~ 1140 DEG C, and the temperature of the 6th stage sintering is 1120 ~ 1140 DEG C.
Wherein, described in step (3), hardness is HRA30 ~ 45 degree.
Wherein, described in step (3), compression strength is more than 400Kgf.
Wherein, grinding described in step (6) adopts oscillating mill to carry out vibro-grinding, and the time of described vibro-grinding is 20 ~ 40min.
Wherein, in step (2), the equipment of sintering is net belt type sintering furnace.
Wherein, in step (3), heat treated equipment is net belt type heat-treatment furnace.
Once molding formed the obtaining of mould is adopted to give birth to embryo in technique of the present invention.Compression molding adopts off normal size simultaneously shaping, and Simplified flowsheet step improves product surface quality, improves the adverse effect of former technique, decrease raw materials for production, better improves production efficiency, reduces production cost.
Detailed description of the invention
Technical scheme of the present invention is further illustrated below in conjunction with embodiment.
Embodiment 1
Powder metallurgy manufactures a technique for output shaft of gear, comprises the following steps:
(1) stir: base iron is added other formula powder material and stir, Homogeneous phase mixing.
(2) shaping: mixed uniformly powder material is sent into forming machine hopper, suppress the raw embryo of product by shaping dies is once-forming.This forming die structure is for eating following two punch, to off normal size direct forming simultaneously, because undershoot off normal portion size is certain, for subsidy formed powder charging quantity, therefore increase next punching, rush filling by next and add top pressure, its off normal partial density is increased, thus increase product bond strength, by next punching, part is ejected assisted demoulding after shaping.
(3) sinter: raw for product embryo is put on carbon plate, sinters in net belt type sintering furnace, regulate the gentle atmosphere flow of sintering network speed, sinter raw for product embryo into semi-finished product.Sintering comprises six stage sintering, and the furnace temperature of per stage sintering is specially: the first stage sinters 670 DEG C, and second stage sinters 770 DEG C, and the phase III sinters 940 DEG C, and fourth stage sinters 1090 DEG C, and five-stage sinters 1120 DEG C, and the 6th stage sintered 1120 DEG C.The raw embryo of product is from entering stove to coming out of the stove as 4h.
(4) recessing: the semi-finished product sintered are processed C catching groove footpath and O type annular groove footpath.
(5) semi-finished product that car is good are placed on heat treatment guipure, heated by heat-treatment furnace, heat treatment temperature 850 DEG C, heat treatment time 2 hours, then enters oil groove quenching, oil temperature less than 60 DEG C, make product hardness reach within the scope of HRA45 degree, finally send into tempering furnace tempering 1.5 hours, temperature 210 DEG C, make product compression strength reach more than 400Kgf, then product is sent;
(6) vibro-grinding: the product that heat treatment is good puts into oscillating mill, adds grind stone, vibrates 30 minutes removal surface blots and burr gets product.
(7) finished product is cleaned oil immersion, then pack.
Embodiment 2
In this example except following condition, other are all same as embodiment 1:
The temperature of each stage sintering is specially, and the first stage sinters 690 DEG C, and second stage sinters 790 DEG C, and the phase III sinters 960 DEG C, and fourth stage sinters 1110 DEG C, and five-stage sinters 1140 DEG C, and the 6th stage sintered 1140 DEG C.The raw embryo of product is from entering stove to coming out of the stove as 3.5h.
Embodiment 3
In this example except following condition, other are all same as embodiment 1:
The temperature of each stage sintering is specially, first stage 680 DEG C, second stage 780 DEG C, phase III 950 DEG C, fourth stage 1100 DEG C, five-stage 1130 DEG C, the 6th stage 1130 DEG C.The raw embryo of product is from entering stove to coming out of the stove as 3.75h.
Embodiment 4
In this example except following condition, other are all same as embodiment 3:
Heat treated temperature is 840 DEG C, heat treatment time 3 hours; Quenching makes the hardness of product reach HRA45; The temperature of tempering is 200 DEG C, and the time of tempering is 2 hours.
Embodiment 5
In this example except following condition, other are all same as embodiment 3:
Heat treated temperature is 860 DEG C, heat treatment time 1 hour; Quenching makes the hardness of product reach HRA40; The temperature of tempering is 220 DEG C, and the time of tempering is 1 hour.
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (9)
1. manufacture a technique for output shaft of gear with powder metallurgy, it is characterized in that, comprise the following steps:
(1) raw embryo is obtained by once molding formed for the iron-based powder use mould through stirring;
(2) described raw embryo is carried out sintering 3.5 ~ 4h at 670 ~ 1140 DEG C of temperature, obtain semi-finished product;
(3) described semi-finished product are heat-treated 1 ~ 3 hour at 840 ~ 860 DEG C of temperature, the oil that then serviceability temperature is no more than 60 DEG C carries out quenching until it reaches predetermined hardness, then at 200 ~ 220 DEG C, tempering makes it reach predetermined compression strength for 1 ~ 2 hour, obtains thick product;
(4) described thick product is carried out grinding and cleaning oil immersion.
2. technique according to claim 1, is characterized in that, compression molding described in step (1) comprises off normal size simultaneously shaping.
3. technique according to claim 1, is characterized in that, also comprises life embryo is processed C catching groove footpath and O type annular groove footpath after step (2) before step (3).
4. technique according to claim 1, it is characterized in that, sinter described in step (2) and specifically comprise first stage sintering, second stage sinters, phase III sinters, fourth stage sinters, five-stage sintering and the 6th stage sintering, the temperature of described first stage sintering is 670 ~ 690 DEG C, the temperature of described second stage sintering is 770 ~ 790 DEG C, the temperature of described phase III sintering is 940 ~ 960 DEG C, the temperature of described fourth stage sintering is 1090 ~ 1110 DEG C, the temperature of five-stage sintering is 1120 ~ 1140 DEG C, the temperature of the 6th stage sintering is 1120 ~ 1140 DEG C.
5. technique according to claim 1, is characterized in that, described in step (3), hardness is HRA30 ~ 45 degree.
6. technique according to claim 1, is characterized in that, described in step (3), compression strength is more than 400Kgf.
7. technique according to claim 1, is characterized in that, grinding described in step (6) adopts oscillating mill to carry out vibro-grinding, and the time of described vibro-grinding is 20 ~ 40min.
8. technique according to claim 1, is characterized in that, in step (2), the equipment of sintering is net belt type sintering furnace.
9. technique according to claim 1, is characterized in that, in step (3), heat treated equipment is net belt type heat-treatment furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410457868.4A CN104259462A (en) | 2014-09-10 | 2014-09-10 | Technology for manufacturing gear output shaft by means of powder metallurgy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410457868.4A CN104259462A (en) | 2014-09-10 | 2014-09-10 | Technology for manufacturing gear output shaft by means of powder metallurgy |
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| CN104259462A true CN104259462A (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410457868.4A Pending CN104259462A (en) | 2014-09-10 | 2014-09-10 | Technology for manufacturing gear output shaft by means of powder metallurgy |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672181A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Production process of powder metallurgy products |
| CN102672179A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Production technique of powder metallurgy product |
| CN102672180A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Powdery metallurgical finished product process |
| CN102672182A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Process utilizing powder metallurgy to manufacture gear output shaft |
| CN102672185A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Process for manufacturing high-precision gear ring from powder metallurgy |
| CN102672186A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Manufacturing process for gear ring in powder metallurgy |
-
2014
- 2014-09-10 CN CN201410457868.4A patent/CN104259462A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672181A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Production process of powder metallurgy products |
| CN102672179A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Production technique of powder metallurgy product |
| CN102672180A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Powdery metallurgical finished product process |
| CN102672182A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Process utilizing powder metallurgy to manufacture gear output shaft |
| CN102672185A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Process for manufacturing high-precision gear ring from powder metallurgy |
| CN102672186A (en) * | 2012-06-07 | 2012-09-19 | 太仓市锦立得粉末冶金有限公司 | Manufacturing process for gear ring in powder metallurgy |
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Application publication date: 20150107 |