CN100475430C - Manufacturing process of chain wheel for chain saw - Google Patents

Manufacturing process of chain wheel for chain saw Download PDF

Info

Publication number
CN100475430C
CN100475430C CNB2006100704927A CN200610070492A CN100475430C CN 100475430 C CN100475430 C CN 100475430C CN B2006100704927 A CNB2006100704927 A CN B2006100704927A CN 200610070492 A CN200610070492 A CN 200610070492A CN 100475430 C CN100475430 C CN 100475430C
Authority
CN
China
Prior art keywords
gear
wheel hub
wheel
chain
soldering
Prior art date
Application number
CNB2006100704927A
Other languages
Chinese (zh)
Other versions
CN1974115A (en
Inventor
宓建英
Original Assignee
宓建英
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 宓建英 filed Critical 宓建英
Priority to CNB2006100704927A priority Critical patent/CN100475430C/en
Publication of CN1974115A publication Critical patent/CN1974115A/en
Application granted granted Critical
Publication of CN100475430C publication Critical patent/CN100475430C/en

Links

Abstract

The manufacture process of chain wheel for chain saw includes the following steps: powder metallurgy process to produce gear blank with sorted materials; precise forging through soaking graphite milk or coating graphite or setting in nitrogen protection, fast induction heating to 815-950 deg.c for less than 20 sec, fast forging in closed mold and demolding to reach gear density greater than 7.7 g/cu cm; assembling the gear to hub; and brazing and hardening in the protection of nitrogen with small amount of hydrogen inside a brazing furnace with fast cooling gas system for gas quenching to harden through phase change to reach hardness over HRC58. The manufacture process is simple, and has high production efficiency, low cost and high product precision and quality.

Description

The manufacture method of chain wheel for chain saw
Technical field
The invention belongs to machinery manufacturing technology field, is a kind of manufacture method of chain wheel for chain saw specifically.
Background technology
Chain wheel for chain saw is an important spare part in the chain saw, and its function is to drive the saw chain running, thus cutting timber.Sprocket wheel is generally formed by sprocket gear and wheel hub erection welding.Traditional sprocket gear manufacturing technology is to do by the method mechanism of machining.Machined has had the low-carbon low-alloy steel cold punching or the cold-extruded gear blank of gear profile, finishes through over carburizing heat treatment then; Hub of chain wheel is generally finished by punch forming, and gear is different with the material of wheel hub, and gear material is a low-carbon low-alloy steel, for example: 17CrNi6; The wheel hub material is 25CrMo4.
The assembly technology flow process of sprocket wheel is: gear is put in storage with wheel hub assembling → soldering → quench hardening heat treatment → Shot Blasting → inner bore honing → check after carburizing heat treatment.
The traditional manufacture method of another kind of gear is that the back is handled with the wheel hub sweating heat and formed by the metallurgical sprocket gear of making of ordinary powder.But the density of gear generally is lower than 7.1g/cm 3, the back-geared hardness of heat treatment is lower than HRC45.
Traditional technology has following shortcoming:
1, long by cold punching, cold-extruded and machined gear blank cycle, efficient is low, the cost height;
2, need two step heat treatments (to need carburizing heat treatment after the Gear Processing in the sprocket wheel manufacture process; Need hardening heat to handle after the soldering), the cost height, and also distortion, especially sprocket wheel and wheel hub soldering after-baking meeting that increase causes because of ripe processing cause very big distortion; And because gear is different with the material of wheel hub, for ensuring the quality of products, heat treated atmosphere needs strict control.
Though 3 existing ordinary powder metallurgical manufacturing methods have improved the efficient of producing, because its gear train branch limit, gear blank is without the closed chamber precision forging, and gear density is low, and performance is difficult to compare favourably with the machined gear.
How to study a kind of manufacture method of chain wheel for chain saw, make that technology is simple, production efficiency is high, cost of manufacture is low, and sprocket wheel quality and precision are high again, and this is the technical task that needs to be resolved hurrily at present.
Summary of the invention
The objective of the invention is deficiency, a kind of manufacture method of chain wheel for chain saw is provided, simplify working process, enhance productivity, reduce cost of manufacture, improve machining accuracy and quality at the prior art existence.
The objective of the invention is to be achieved through the following technical solutions: a kind of manufacture method of chain wheel for chain saw, comprise the making of gear, making, gear and the wheel hub erection welding and the postprocessing working procedures of wheel hub, it is characterized in that: the making of described gear is finished by forging powder metallurgy process, comprises following technology:
(1), gear blank component:
A) phosphorus content is 0.6%-0.9%;
B) nickel content is 1.6%-2.0%;
C) molybdenum content is 0.5%-0.7%;
D) content of copper is controlled between the 2.0%-3.0%;
E) manganese sulfide content is 0-0.2%;
F) all the other components are iron;
Above component is made gear blank by ordinary powder metallurgy;
(2) gear blank closed chamber precision forging: gear blank is immersed in the aquadag or graphites, fast eddy-current heating is to 815-950 ℃, and the eddy-current heating time is less than 20 seconds, moves on to that quick closed chamber forges in the mould, the demoulding again, carry out ball blast then, remove oxide on surface and residual graphite; Forge backgear density greater than 7.7g/cm 3
Described gear and wheel hub erection welding comprise following technological process:
After gear assembles with the wheel hub of having processed, soldering be hardened in the soldering oven step and finish, soldering oven has the gas quickly cooling device after its thermal treatment zone, this cooling device is to lead to spray to sprocket wheel after the protective atmosphere that adds small quantity of hydrogen cools off by air pump and heat exchanger with being with nitrogen, makes sprocket wheel undergo phase transition sclerosis in gas quenching; Gear hardness after the soldering sclerosis can reach more than the HRC58, and wheel hub has improved the heat treatment deformation that causes because of oil quenching greatly because of the fast gas cooling has improved intensity simultaneously.
In the manufacture method of above-mentioned chain wheel for chain saw, for ease of follow-up machined, described gear blank through closed chamber forge, the demoulding and carry out ball blast after, gear blank is incubated 85-95 minute under 600-700 ℃, anneal in nitrogen or restitutive protection's atmosphere.
In the manufacture method of above-mentioned chain wheel for chain saw, after gear and wheel hub assembling and the soldering sclerosis, carried out tempering in 50-70 minute through 155-165 ℃ of insulation, the gear material case hardness reaches HRC58, microhardness 700-800HV1; Wheel hub hardness is 200-500HV3; Then, carry out Shot Blasting and inner bore honing.
The present invention compared with prior art has the following advantages and good effect:
Technology of the present invention is compared with traditional chain wheel for chain saw manufacture method, forges powder metallurgy and soldering sclerosis one-step method manufacturing sprocket wheel and has following advantage:
1, gear density can be greater than 7.8g/cm 3, can compare favourably with the steel of model of the same race;
But 2 automated productions have improved production efficiency;
3, the gear material composition can design arbitrarily, to satisfy different needs;
4, need not oil quenching heat treatment after carburizing heat treatment and the soldering, improved the distortion that wheel hub causes because of heat treatment, can effectively control product quality and precision;
5, great advantage is to save operation, reduces cost greatly.
6, technology of the present invention is simple, reasonable, easy to utilize.
Description of drawings
Fig. 1 is the stereogram of chain wheel for chain saw embodiment of the present invention.
The specific embodiment
Below in conjunction with specific embodiment the present invention is described in further detail:
Referring to Fig. 1, a kind of embodiment of manufacture method of chain wheel for chain saw, comprise making, the making of wheel hub 2, the gear 1 and wheel hub 2 assembling soldering and postprocessing working procedures of gear 1, the sprocket wheel manufacturing mainly is to finish by closed chamber precision forging powder metallurgical gear blank, and its concrete technical scheme is as follows:
For example: STIHL MS170 chain wheel for chain saw
1) gear blank material prescription: carbon: 0.71%; Nickel: 1.72%; Molybdenum: 0.55%; Copper: 2.3%, manganese sulfide is not less than 0.2% (if need machined subsequently will add manganese sulfide, otherwise needing to add manganese sulfide); The wheel hub material is 25CrMo4.
2) the gear blank Weight control is at 29.0-29.6g;
3) gear blank is immersed in the aquadag, and fast eddy-current heating to 870 is to 900 ℃ then, and the eddy-current heating time was 7 seconds, and moving on in the mould fast again, closed chamber forges, the demoulding; Forge backgear density greater than 7.7g/cm 3
4) gear blank ball blast is removed oxide on surface and residual graphite;
5) gear blank is incubated 90 minutes down at 700 ℃, anneals in nitrogen protection atmosphere; Then, according to gear blank and wheel hub 2 assembling needs, gear blank is carried out machined.
6) gear 1 and wheel hub 2 assemblings;
7) chain wheel for chain saw after gear 1 assembles with wheel hub 2 is in the soldering oven of 30.5 centimetres (12 inches), and a step is finished soldering and sclerosis, and 3 are the soldering position among Fig. 1.The belt translational speed is 20 cm per minute; soldering oven has the gas quickly cooling device after its thermal treatment zone; this cooling device is to add after 10% hydrogen shield atmosphere is cooled off by air pump and heat exchanger with 90% nitrogen to spray to sprocket wheel, makes sprocket wheel undergo phase transition sclerosis in gas quenching.
8) sprocket wheel after soldering and the sclerosis needs to carry out tempering in one hour through 160 ℃ of insulations, and its material surface hardness can reach HRC58, and microhardness is greater than 700HV1; Wheel hub hardness is 305HV3;
9) Shot Blasting;
10) inner bore honing.
The present invention is different with traditional machined or ordinary powder metallurgy, and the present invention is with forging powder metallurgy process manufacturing sprocket gear and forming with wheel hub soldering sclerosis.The technology of the present invention comprises the material composition design, and design of powder metallurgical gear blank and closed chamber forge design.From gear manufacturing technology, mainly comprised for two steps: one is the metallurgical manufacturing of ordinary powder gear blank; Two is gear blank closed chamber finish forge.
The gear material component prescription consists predominantly of main components such as carbon, nickel, molybdenum, copper.The purpose of design of material composition is: a) the carburizing heat treatment step after the removal Gear Processing; B) enough quenching degree will be arranged, the assurance sprocket gear is finished hardening heat and is handled in brazing process.
The design of gear blank: a) weight of strict control gear blank; B) shaped design of gear blank is wanted rationally to avoid cracking in the forging process.
The design that closed chamber forges: the protection on a) strict control gear blank skin decarburization or oxidized, so temperature controlling, surface and control heat time heating time are extremely important.It is the precision forging process that closed chamber forges, and does not have burr.
Because the manufacturing of blank and closed chamber forge can automated production, the efficient height.Thereby forging powder metallurgical gear can reduce cost greatly.
The technology of the present invention and traditional soldering and after heat treatment different, the soldering of sprocket wheel and be hardened in the stove step and finish.
In a word, finishing of the technology of the present invention mainly is the component prescription that closing reason is selected the gear blank material, and closed chamber precision forging powder metallurgical gear blank technology and one step of sprocket wheel soldering sclerosis finish that technology realizes.
Certainly, above-mentioned explanation is not to be limitation of the present invention, and the present invention is not limited to above-mentioned giving an example, those skilled in the art, and in essential scope of the present invention, the variation of making, remodeling, interpolation or replacement all should belong to protection scope of the present invention.

Claims (3)

1, a kind of manufacture method of chain wheel for chain saw comprises the making of gear, making, gear and the wheel hub erection welding and the postprocessing working procedures of wheel hub, it is characterized in that: the making of described gear is finished by forging powder metallurgy process, comprises following technology:
(1), gear blank component:
A) phosphorus content is 0.6%-0.9%;
B) nickel content is 1.6%-2.0%;
C) molybdenum content is 0.5%-0.7%;
D) content of copper is controlled between the 2.0%-3.0%;
E) manganese sulfide content is 0-0.2%;
F) all the other components are iron;
Above component is made gear blank by ordinary powder metallurgy;
(2) gear blank closed chamber precision forging: gear blank is immersed in the aquadag or graphites, fast eddy-current heating is to 815-950 ℃, and the eddy-current heating time is less than 20 seconds, moves on to that quick closed chamber forges in the mould, the demoulding again, carry out ball blast then, remove oxide on surface and residual graphite; Forge backgear density greater than 7.7g/cm 3
Described gear and wheel hub erection welding comprise following technological process:
After gear assembles with the wheel hub of having processed, soldering be hardened in the soldering oven step and finish, soldering oven has the gas quickly cooling device after its thermal treatment zone, this cooling device is to lead to spray to sprocket wheel after the protective atmosphere that adds small quantity of hydrogen cools off by air pump and heat exchanger with being with nitrogen, makes sprocket wheel undergo phase transition sclerosis in gas quenching; Gear hardness after the soldering sclerosis can reach more than the HRC58, and wheel hub has improved the heat treatment deformation that causes because of oil quenching greatly because of the fast gas cooling has improved intensity simultaneously.
2, according to the manufacture method of the described chain wheel for chain saw of claim 1; it is characterized in that: described gear blank through closed chamber forge, the demoulding and carry out ball blast after; gear blank is incubated 85-95 minute under 600-700 ℃, anneal in nitrogen or restitutive protection's atmosphere.
3, according to the manufacture method of the described chain wheel for chain saw of claim 2, it is characterized in that: after gear and wheel hub assembling and soldering and the sclerosis, carried out tempering in 50-70 minute through 155-165 ℃ of insulation, the gear material case hardness reaches HRC58, microhardness 700-800HV1; Wheel hub hardness is 200-500HV3; Then, carry out Shot Blasting and inner bore honing.
CNB2006100704927A 2006-12-05 2006-12-05 Manufacturing process of chain wheel for chain saw CN100475430C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2006100704927A CN100475430C (en) 2006-12-05 2006-12-05 Manufacturing process of chain wheel for chain saw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2006100704927A CN100475430C (en) 2006-12-05 2006-12-05 Manufacturing process of chain wheel for chain saw

Publications (2)

Publication Number Publication Date
CN1974115A CN1974115A (en) 2007-06-06
CN100475430C true CN100475430C (en) 2009-04-08

Family

ID=38124616

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2006100704927A CN100475430C (en) 2006-12-05 2006-12-05 Manufacturing process of chain wheel for chain saw

Country Status (1)

Country Link
CN (1) CN100475430C (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102049519B (en) * 2010-12-31 2012-12-05 江苏双峰粉末冶金制品有限公司 Manufacturing method of powder metallurgy chain wheel
CN102179519B (en) * 2011-03-09 2013-01-23 宁波甬台粉末冶金有限公司 Powder metallurgy transmission gear and manufacturing method thereof
CN102251080B (en) * 2011-06-21 2013-08-21 临沂市金立机械有限公司 Direct gas quenching unit for mesh-belt continuous brazing furnace
CN102284846B (en) * 2011-08-24 2013-04-10 湖南长重机器股份有限公司 Machining method of chain wheel
CN102672164A (en) * 2012-06-07 2012-09-19 太仓市锦立得粉末冶金有限公司 Powder metallurgy
WO2014040927A1 (en) * 2012-09-17 2014-03-20 Siemens Aktiengesellschaft Large transmission gearwheel and process for producing a large transmission gearwheel
CN102921920B (en) * 2012-11-23 2014-08-06 安吉德康精密铸件有限公司 Injection molding mold for chain wheel of chain saw
CN103785786B (en) * 2014-01-26 2016-03-02 山西豪钢锻造有限公司 The production method of the overall mining gipsy sheave of closed-die forging
CN104493484A (en) * 2014-02-18 2015-04-08 金华永乐矿山机械有限公司 Belt wheel flangeless forging process of electromagnetic clutch of automotive air conditioner
CN105275794A (en) * 2015-11-02 2016-01-27 太原理工大学 Thrust plate having low-friction surface and manufacturing method
CN107130089B (en) * 2017-04-17 2018-06-19 重庆派斯克刀具制造股份有限公司 A kind of hardening technique after high-speed steel soldering
CN107588179B (en) * 2017-11-08 2020-02-07 临沂市金立机械有限公司 Novel material for sprocket gas quenching and process for machining sprocket by using novel material
CN109930092A (en) * 2017-12-17 2019-06-25 宜兴安纳西智能机械设备有限公司 A kind of battery conveying device sprocket wheel spacer material
CN109930089A (en) * 2017-12-17 2019-06-25 宜兴安纳西智能机械设备有限公司 A kind of battery conveying device sprocket wheel material

Also Published As

Publication number Publication date
CN1974115A (en) 2007-06-06

Similar Documents

Publication Publication Date Title
AU2017265161B2 (en) Structured material alloy component fabrication
DE102010004081C5 (en) Method for thermoforming and curing a circuit board
KR20150125608A (en) Steel for mold, and mold
EP2289694B1 (en) Press-cure mold cooling device
US7004004B2 (en) Method of making a hardened motor-vehicle part of complex shape
US7827842B2 (en) Hot forging facility
CN100417827C (en) Double-metal solid bearing cage and producing process thereof
CN103286533A (en) Processing technology for rear axle drive bevel gear
CN105643222B (en) A kind of processing method of one axis forging mold of automobile
DE102005003551B4 (en) Method for hot forming and hardening a steel sheet
KR100939462B1 (en) Hot forged products excellent in fatigue strength, process for production thereof, and machine structural parts
CN102837165B (en) Manufacturing method for final-stage driving gear of high-power coal mining machine
CN103447784B (en) A kind of driving shaft processing technology
JP3309344B2 (en) Manufacturing method of gear with center hole
JP2003231915A (en) Press hardening method
CN102888610A (en) Thermal treatment method for internal spline gear with small modulus
CN104028765A (en) Powder metallurgy component and production method of powder metallurgy component with through hole
WO2004033126A1 (en) Press-hardened part and method for the production thereof
CN102803522B (en) Method for producing harmonic drive gear base material
WO2004082872A3 (en) Method and apparatus for strengthening of powder metal gears by ausforming
US6013225A (en) Surface densification of machine components made by powder metallurgy
CN1647874A (en) Method to make sinter-hardened powder metal parts with complex shapes
CN102312172B (en) B3R hot work die steel with high strength and toughness and resistance to tempering, and preparation process thereof
CN100349691C (en) Manufacture for casting low-alloy cold-working die steel and die steel thereby
DE102009012940B4 (en) Method for producing a component, in particular a sheet-metal component, and production line for producing the component

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090408

Termination date: 20151205

EXPY Termination of patent right or utility model