CN102476264A - Technology for manufacturing stationary cam and movable disk cam component of transmission box of crop harvester - Google Patents
Technology for manufacturing stationary cam and movable disk cam component of transmission box of crop harvester Download PDFInfo
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- CN102476264A CN102476264A CN2010105688289A CN201010568828A CN102476264A CN 102476264 A CN102476264 A CN 102476264A CN 2010105688289 A CN2010105688289 A CN 2010105688289A CN 201010568828 A CN201010568828 A CN 201010568828A CN 102476264 A CN102476264 A CN 102476264A
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- stationary cam
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Abstract
The invention discloses a technology for manufacturing a stationary cam and movable disk cam component of a transmission box of a crop harvester. The stationary cam and movable disk cam component of the transmission box of the crop harvester is made from an alloy powder material according to the processes of mixing, primarily pressing, pre-sintering, re-pressing, re-sintering, finishing, machining and surface steam blacking, wherein the alloy powder material comprises the following components by weight pecent: 6-8% of Cu, 1-4% of Ni, 0.5-1% of Mo, 0.2-0.5% of S, 1-2% of C, 0.5% of zinc stearate and the balance of Fe powder. The technology disclosed by the invention is simple, technology difficulty is low, materials can be obviously saved, and the stationary cam and movable disk cam component of the transmission box of the crop harvester which has high compactness, high strength and high abrasion resistance and can not cause mutual seizure phenomenon during meshing friction under higher load can be manufactured by adopting the manufacturing technology.
Description
Technical field
The present invention relates to a kind of manufacturing process of metal parts, more particularly, the present invention relates to a kind of crops cropper gearbox stationary cam, Moving plate cam pack manufacturing process.
Background technology
Crops cropper gearbox stationary cam, Moving plate cam pack are the main carrying parts of crops cropper gearbox; Crops cropper gearbox stationary cam on the market, Moving plate cam pack adopt the 20CrMnTi bar to forge into blank now, form through the after-baking of multiple tracks machining operation cut.This manufacturing process is a traditional handicraft, the technology comparative maturity, but come with some shortcomings: stock utilization has only about 50% in the manufacture process, and the machining operation is more, requirement on machining accuracy is high; Need to adopt complicated heat treatment technology to guarantee that manufacturing crops cropper gearbox stationary cam and Moving plate cam reach higher mechanical properties and hardness, technology difficulty is big; Under big load, be prone to stick together and kill phenomenon each other when crops cropper gearbox stationary cam and the friction of Moving plate cam-engaged, have a strong impact on the normal use of crops cropper.
Summary of the invention
The present invention is directed to the deficiency of existing manufacturing process; A kind of technology is simple, technology difficulty is low, can significantly save material crops cropper gearbox stationary cam, Moving plate cam pack manufacturing process are provided, the crops cropper gearbox stationary cam, the Moving plate cam pack that utilize this manufacturing process can process high compactness, high strength and high-wearing feature, when the engagement friction, can under big load, not stick together and kill phenomenon each other.
The present invention realizes technical goal through following technical proposals.
Crops cropper gearbox stationary cam, Moving plate cam pack manufacturing process; Its improvements are: said crops cropper gearbox stationary cam, Moving plate cam pack are processed by mixing → first pressing → pre-burning → multiple pressure → resintering → finishing → cut → surperficial steam blackening by a combination bronze powder material, and it comprises the following steps:
1) mixes: each composition of said alloy powder material is inserted in the airtight container by weight ratio, mix into pre-alloyed powder; Said weight proportion is: Cu 6～8%, Ni 1～4%, Mo 0.5～1%, S 0.2～0.5%, C 1～2%, zinc stearate 0.5%, all the other are the Fe powder;
2) first pressing: said pre-alloyed powder is filled in the prefabricated molds, presses down the first base blank of processing density 6.2～6.5g/cm2 at 7～8tf/cm2 pressure;
3) pre-burning: the presintering 2～3 hours in 780～8500C low temperature, cracked ammonium+protection of nitrogen gas atmosphere of said base blank just is cooled to room temperature through water channel then;
4) the multiple pressure: the blank of pre-burning shaping is inserted in the multiple compressed steel mould, under the pressure of 9～10tf/cm2, carries out multiple pressure, and control density is 6.8～7.2g/cm3;
5) resintering: will be multiple blank of pressing is a resintering 2～3 hours in 1120～11500C, the cracked ammonium+protection of nitrogen gas atmosphere in temperature;
6) finishing: insert extruding in the die finish, extruding allowance: external diameter 80～120 μ m, internal diameter 40～70 μ m to the blank of resintering;
7) cut: local a small amount of cut;
8) surperficial steam blackout: the stationary cam of cut, Moving plate cam pack are exposed in the superheated vapour environment 2～4 hours under 450～5900c.
In the above-mentioned manufacturing process, said alloy powder granularity >=100 orders, said Fe powder adopts the high-quality atomized iron powder.
The present invention compared with prior art has following good effect:
1. technology is simple, and technology difficulty is low;
2. materials are about 2/3 of prior aries, can significantly save material;
3. the crops cropper gearbox stationary cam, the Moving plate cam pack that utilize this manufacturing process can process high compactness, high strength and high-wearing feature, when the engagement friction, can under big load, not stick together and kill phenomenon each other.
The specific embodiment
Below in conjunction with embodiment the present invention is described further.
Crops cropper gearbox stationary cam, Moving plate cam pack manufacturing process; Said crops cropper gearbox stationary cam, Moving plate cam pack are processed by mixing → first pressing → pre-burning → multiple pressure → resintering → finishing → cut → surperficial steam blackening by a combination bronze powder material, and it comprises the following steps:
1) mixes: each composition of said alloy powder material is inserted in the airtight container by weight ratio, in batch mixer, evenly mix into pre-alloyed powder; Said weight proportion is: Cu 6～8%, Ni 1～4%, Mo 0.5～1%, S 0.2～0.5%, C 1～2%, zinc stearate 0.5%, all the other are the Fe powder; Said alloy powder granularity >=100 orders, the Fe powder adopts the high-quality atomized iron powder;
2) first pressing: said pre-alloyed powder is filled in the prefabricated molds; Press down the first base blank of processing density 6.2～6.5g/cm2 at 7～8tf/cm2 pressure; This density helps the decomposition and the volatilization of lubricant in the low temperature presintering, and defectives such as crackle appear in product in the multiple pressure because residual lubricant is prone to cause;
3) pre-burning: the presintering 2～3 hours in 780～8500C low temperature, cracked ammonium+protection of nitrogen gas atmosphere of said base blank just is cooled to room temperature through water channel then; The pre-burning purpose mainly is the work hardening that receives when eliminating the powder particle first pressing, and the oxidation that simultaneously powder particle surface is received is able to reduce and the volatilization of lubricant; But it should be noted that calcined temperature will be controlled at 780～8500C,, the counterdiffusion of excessive sintering phenomenon of powder particle and alloying element can take place then as too high; Its expansion temperature of graphite powder that particularly adds is lower; And diffusion velocity is very fast, if graphite diffusion becomes austenite and in cooling procedure, forms pearlite, intensity increase, the resistance of deformation of blank is increased; The raising of density is unfavorable to pressing again in the time of will hindering multiple the pressure;
4) the multiple pressure: the blank of pre-burning shaping is inserted in the multiple compressed steel mould, under the pressure of 9～10tf/cm2, carries out multiple pressure, and control density is 6.8～7.2g/cm3; Multiple purpose of pressing is to make the mechanical engagement between powder particle to become intercrystalline atom combination;
5) resintering: will be multiple blank of pressing is a resintering 2～3 hours in 1120～11500C, the cracked ammonium+protection of nitrogen gas atmosphere in temperature; In resintering, press the stress concentration and the work hardening that cause to be eliminated by multiple; Carbon in the blank and abundant diffusion dissolution of other alloying element and alloying; Reach desired alloy austenite tissue, and under certain cooling velocity, obtain final desirable institutional framework and mechanical property;
6) finishing: insert extruding in the die finish, extruding allowance: external diameter 80～120 μ m, internal diameter 40～70 μ m to the blank of resintering; Can improve alloy blank dense structure property through extruding, thereby improve wearability;
7) cut: adopt crops cropper gearbox stationary cam, the Moving plate cam pack pressed compact precision of manufacturing of the present invention to reach instructions for use basically, only need endoporus and external diameter and connecting hole are carried out a small amount of cut;
8) surperficial steam blackout: the stationary cam of cut, Moving plate cam pack are exposed in the superheated vapour environment 2～4 hours under 450～5900c; Water vapour reacts with stationary cam, the Moving plate cam pack surface of cut and generates the stronger blue grey ferriferous oxide of a kind of adhesiveness between exposure period; 3Fe+4H2O (vapour) → Fe3O4+4H2 (vapour), this blue grey ferriferous oxide can significantly improve part corrosion resistance, wearability.
Be the embodiment that makes stationary cam, Moving plate cam pack below:
1) mixes: calculate and take by weighing each alloy powder material weight by intending preparation amount 100Kg and weight proportion; Said alloy powder granularity >=100 orders, said weight proportion is: Cu 7%, Ni 2%, Mo 0.8%, S 0.3%, C 1.5%, zinc stearate 0.5%, all the other are Fe powder (high-quality atomized iron powder); The alloy powder material that takes by weighing is inserted in the airtight container, in batch mixer, evenly mix into pre-alloyed powder;
2) first pressing: above-mentioned pre-alloyed powder is filled in the prefabricated molds, presses down the first base blank of processing density 6.4g/cm2 at 7.5tf/cm2 pressure;
3) pre-burning:, be cooled to room temperature through water channel then with the presintering 2.5 hours in 780～8000C low temperature, cracked ammonium+protection of nitrogen gas atmosphere of above-mentioned base blank just;
4) the multiple pressure: the blank that above-mentioned pre-burning is shaped is inserted in the multiple compressed steel mould, under the pressure of 10tf/cm2, carry out multiple pressure, control density is 6.8～7.0g/cm3;
5) resintering: is resintering 2.5 hours in 1120～11500C, the cracked ammonium+protection of nitrogen gas atmosphere with above-mentioned multiple blank of pressing in temperature;
6) finishing: insert extruding in the die finish, extruding allowance: external diameter 100 μ m, internal diameter 50 μ m to the blank of above-mentioned resintering;
7) cut: the endoporus of the blank of above-mentioned finishing and external diameter and connecting hole are carried out a small amount of cut;
8) surperficial steam blackout: the stationary cam of cut, Moving plate cam pack are exposed in the superheated vapour environment 3 hours under 450～5000c.
Adopting crops cropper gearbox stationary cam, the Moving plate cam pack tensile strength of above manufacturing process manufacturing is 700MPa; Case hardness is HB170～180; Material therefor is about 2/3 of a prior art; Wearability is enhanced about more than once, and can under big load, not stick together in when friction engagement and to kill phenomenon each other.
Technology of the present invention is simple, need not to adopt complicated heat treatment technology to guarantee that manufacturing stationary cam and Moving plate cam reach higher mechanical properties and hardness, and technology difficulty is low; Materials are about 2/3 of prior aries, can significantly save material; The crops cropper gearbox stationary cam, the Moving plate cam pack that utilize this manufacturing process can process high compactness, high strength and high-wearing feature, when the engagement friction, can under big load, not stick together and kill phenomenon each other.
Claims (3)
1. a crops cropper gearbox stationary cam, Moving plate cam pack manufacturing process; It is characterized in that: said crops cropper gearbox stationary cam, Moving plate cam pack by a combination bronze powder material by mix → hob → pre-burning → multiple pressure → resintering → finishing → cut → surperficial steam blackening processes, it comprises the following steps:
1) mixes: each composition of said alloy powder material is inserted in the airtight container by weight ratio, mix into pre-alloyed powder; Said weight proportion is: Cu 6～8%, Ni 1～4%, Mo 0.5～1%, S 0.2～0.5%, C 1～2%, zinc stearate 0.5%, all the other are the Fe powder;
2) first pressing: said pre-alloyed powder is filled in the prefabricated molds, at 7～8tf/cm
2Pressure presses down processes density 6.2～6.5g/cm
2First base blank;
3) pre-burning: said base blank just in 780～850 ℃ of low temperature, cracked ammonium+protection of nitrogen gas atmosphere presintering 2-3 hour is cooled to room temperature through water channel then;
4) the multiple pressure: the blank of pre-burning shaping is inserted in the multiple compressed steel mould, at 9～10tf/cm
2Pressure under carry out multiple pressure, control density is 6.8～7.2g/cm
3
5) resintering: will be multiple blank of pressing is a resintering 2～3 hours in 1120～1150 ℃, cracked ammonium+protection of nitrogen gas atmosphere in temperature;
6) finishing: insert extruding in the die finish, extruding allowance: external diameter 80～120 μ m, internal diameter 40～70 μ m to the blank of resintering;
7) cut: local a small amount of cut;
8) surperficial steam blackout: the stationary cam of cut, Moving plate cam pack are exposed in the superheated vapour environment 2～4 hours under 450～590 ℃.
2. crops cropper gearbox stationary cam according to claim 1, Moving plate cam pack manufacturing approach is characterized in that: said alloy powder granularity >=100 orders.
3. crops cropper gearbox stationary cam according to claim 1, Moving plate cam pack manufacturing approach is characterized in that: said Fe powder adopts the high-quality atomized iron powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105688289A CN102476264A (en) | 2010-11-29 | 2010-11-29 | Technology for manufacturing stationary cam and movable disk cam component of transmission box of crop harvester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105688289A CN102476264A (en) | 2010-11-29 | 2010-11-29 | Technology for manufacturing stationary cam and movable disk cam component of transmission box of crop harvester |
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| CN102476264A true CN102476264A (en) | 2012-05-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886662A (en) * | 2012-09-29 | 2013-01-23 | 汪金芳 | Manufacturing process of assembled V-type belt wheel |
| CN105257341A (en) * | 2015-10-19 | 2016-01-20 | 泰州市科诚汽车零配件有限公司 | Powder metallurgy engine rotor and manufacturing methods thereof |
| CN105257399A (en) * | 2015-10-19 | 2016-01-20 | 泰州市科诚汽车零配件有限公司 | Automobile engine powder metallurgy rotor and manufacturing methods thereof |
| CN110788327A (en) * | 2019-12-09 | 2020-02-14 | 浙江钰易来汽摩零部件有限公司 | Manufacturing method of powder metallurgy gear |
| CN111531166A (en) * | 2020-05-26 | 2020-08-14 | 南京东睦粉末冶金有限公司 | Method for improving sintering density of iron-based powder metallurgy part |
-
2010
- 2010-11-29 CN CN2010105688289A patent/CN102476264A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102886662A (en) * | 2012-09-29 | 2013-01-23 | 汪金芳 | Manufacturing process of assembled V-type belt wheel |
| CN102886662B (en) * | 2012-09-29 | 2014-11-12 | 汪金芳 | Manufacturing process of assembled V-type belt wheel |
| CN105257341A (en) * | 2015-10-19 | 2016-01-20 | 泰州市科诚汽车零配件有限公司 | Powder metallurgy engine rotor and manufacturing methods thereof |
| CN105257399A (en) * | 2015-10-19 | 2016-01-20 | 泰州市科诚汽车零配件有限公司 | Automobile engine powder metallurgy rotor and manufacturing methods thereof |
| CN110788327A (en) * | 2019-12-09 | 2020-02-14 | 浙江钰易来汽摩零部件有限公司 | Manufacturing method of powder metallurgy gear |
| CN111531166A (en) * | 2020-05-26 | 2020-08-14 | 南京东睦粉末冶金有限公司 | Method for improving sintering density of iron-based powder metallurgy part |
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Application publication date: 20120530 |