CN106238733A - A kind of preparation method of automobile engine three projective table type timing sprocket - Google Patents

A kind of preparation method of automobile engine three projective table type timing sprocket Download PDF

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Publication number
CN106238733A
CN106238733A CN201610626703.4A CN201610626703A CN106238733A CN 106238733 A CN106238733 A CN 106238733A CN 201610626703 A CN201610626703 A CN 201610626703A CN 106238733 A CN106238733 A CN 106238733A
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CN
China
Prior art keywords
projective
type timing
automobile engine
timing sprocket
teeth
Prior art date
Application number
CN201610626703.4A
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Chinese (zh)
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CN106238733B (en
Inventor
徐海
胡云峰
邬全
郭益山
曹玉海
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扬州意得机械有限公司
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Priority to CN201610626703.4A priority Critical patent/CN106238733B/en
Publication of CN106238733A publication Critical patent/CN106238733A/en
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Publication of CN106238733B publication Critical patent/CN106238733B/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F5/00Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02Compacting only
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24After-treatment of workpieces or articles
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/32Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/08Ferrous alloys, e.g. steel alloys containing nickel
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/16Ferrous alloys, e.g. steel alloys containing copper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24After-treatment of workpieces or articles
    • B22F2003/247Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24After-treatment of workpieces or articles
    • B22F2003/248Thermal after-treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F2998/00Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10Processes characterised by the sequence of their steps
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00Treating localised areas of an article

Abstract

The invention discloses the preparation method of a kind of automobile engine three projective table type timing sprocket, technique is: shape sintering once machining high frequency tempering shaping secondary machine.The preparation method of the automobile engine three projective table type timing sprocket of the present invention, powder compacting technology is utilized to produce, first pass through in iron powder is filled in mold cavity by powder former and suppress low-intensity green compact, then by green compact high-temperature heat treatment, improve intensity, then teeth portion local high-frequency processes, ensure that teeth portion has high-wearing feature, then Shape correction, improve product size precision, then machine turning, make product reach assembly precision requirement.Mould stress is relatively low, high life, and product size precision is high, can be mass-produced, and production cost is low.

Description

A kind of preparation method of automobile engine three projective table type timing sprocket
Technical field
Powder metallurgy automobile parts technical field of the present invention, is specifically related to a kind of automobile engine three projective table type timing chain The preparation method of wheel.
Background technology
Timing sprocket function as Timing Belt, be the important component part of engine air distribution system, by with song The connection of axle also coordinates certain gear ratio to ensure the accurate of inlet and outlet time.When the engine runs, the stroke of piston The order (time) that the open and close (time) of (upper and lower motion) valve are lighted a fire, under the interconnection function of timing sprocket, time Run-in synchronism to be kept at quarter.In automobile engine work process, constantly occur in cylinder air inlet, compress, explode, aerofluxus four Process, and, the opportunity of each step will match with the kinestate of piston and position, makes intake and exhaust and piston liter Dropping mutually coordinated, timing sprocket plays a bridge beam action inside electromotor, by strength under the drive of bent axle Pass to corresponding parts.
Existing three projective table type timing sprockets are punch formings, utilize high tonnage stamping machine, by high-precision cold stamping die, and will 5.2 thick iron plate cold-punching moldings.High to equipment requirements, mould and die accuracy is high and has at a relatively high intensity and wear resistance.Mould Former is profile of tooth, cracky and abrasion, and die life is short, and product size precision is low.Timing sprocket three boss is as assembling Benchmark, is extruded iron plate in recessed undershoot respective slot by cold-punching mold upper punch projective structure, makes iron plate produce plastic deformation Form three boss, such three boss flatnesses poor (0.10mm~0.15mm), after operating in being assembled to chain drive system, easily Producing noise, performance is low, and comfort level is poor.Within teeth portion hardness HRC20, antiwear property is low.Punch forming iron plate utilization rate is low, Production cost is high.
Summary of the invention
Goal of the invention: for the deficiencies in the prior art, it is an object of the present invention to provide a kind of automobile engine three convex The preparation method of desk-top timing sprocket, has product size precision high, can be mass-produced, the advantages such as production cost is low.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
The preparation method of a kind of automobile engine three projective table type timing sprocket, technique is: shapes sintering and once machines High frequency tempering shaping secondary machine;Wherein,
Shape: forming machine 800T, actual forming pressure 460T, production 5 per minute~6;Green strength: palm i.e. ruptures;
Sintering: temperature 1120 DEG C ± 10 DEG C, guipure speed: 120 ± 10mm/min;Product strength: HRB65~85;
Once machining: rotating speed 500~1000r/min, feed 0.04~0.07mm/r, pressure 15~20kg/cm2
High frequency: power 60~90kw, heat time heating time 1.2S ± 0.5S, cool time 6S ± 2S;Teeth portion intensity: HRC35~47;
Tempering: temperature 180 DEG C ± 5 DEG C, time 1h, eliminate interiors of products stress after high frequency;
Shaping: forcing press 500T, actual shaping pressure 200T, improves the every dimensional accuracy of product;
Secondary machine: rotating speed 800~1200r/min, feed 0.04~0.07mm/r, pressure 3~7kg/cm2
Three described projective table type timing sprockets are powder metallurgy timing sprocket, and its powder metallurgy matrix material consists of: copper: 0.5 ~ 3%, nickel: 1 ~ 5%, carbon: 0 ~ 0.8%, impurity: 2% is maximum, ferrum: surplus.
The most mach cutter is CBN cutter, it is ensured that the product teeth portion depth of parallelism reaches: within ∥ 0.05.
The cutter of secondary machine is CBN cutter, it is ensured that three boss flatnesses reach:Within 0.06.
Three described projective table type timing sprockets include the teeth portion being located at outer rim, the baseplane being connected with centre bore, Yi Jijun Even three boss being located on baseplane, it is 0.1 ~ 0.2mm that boss exceeds the height of baseplane.
Hot strength 30kgf/mm of three described projective table type timing sprockets2Above;Percentage elongation more than 1%;Charp impact value 1kgf*mm/cm2
The preparation method of the automobile engine three projective table type timing sprocket of the present invention, utilizes powder compacting technology to produce, first Low-intensity green compact are suppressed in iron powder being filled in mold cavity by powder former, then by green compact high-temperature heat treatment, Improving intensity, then teeth portion local high-frequency processes, it is ensured that teeth portion has high-wearing feature, then Shape correction, improves product size Precision, then machines turning, makes product reach assembly precision requirement.Mould stress is relatively low, high life, product chi Very little precision is high, can be mass-produced, and production cost is low.
Beneficial effect: compared with prior art, the present invention has conservation, and die life is high, can give birth in high volume Produce, reduce the advantage of manufacturing cost: on material selects, sintered metal product can select according to the different demands of client or take Join different formula;The depth of quenching of teeth portion can regulate according to demand between 0.5 ~ 1.5 millimeter;Three boss flatness precision can Being realized by machining turning according to demand, be certainly also not limited to sprocket wheel, cam, gear etc. also can take this patent Method realizes producing of powder metallurgy.
Accompanying drawing explanation
Fig. 1 is the structural representation of three projective table type timing sprockets;
Fig. 2 is the sectional view of three projective table type timing sprockets.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further elaborated.Embodiment is to send out for illustrative not limiting Bright.Any those of ordinary skill in this area, it will be appreciated that these embodiments limit the present invention never in any form, can do suitably Amendment and without prejudice to the present invention essence and deviation the scope of the present invention.
Embodiment 1
As depicted in figs. 1 and 2, three projective table type timing sprockets include the teeth portion 2 being located at outer rim, the baseplane 1 being connected with centre bore, And three boss 3 being uniformly located on baseplane 1, it is 0.1 ~ 0.2mm that boss 3 exceeds the height of baseplane 1.This three projective table type Timing sprocket is powder metallurgy timing sprocket, and its powder metallurgy matrix material consists of: copper: 0.5 ~ 3%, nickel: 1 ~ 5%, carbon: 0 ~ 0.8%, impurity: 2% is maximum, ferrum: surplus.
The preparation technology of this three projective table types timing sprocket is: shape sintering once machining high frequency tempering whole Shape secondary machine is connected with camshaft.
Wherein, shape: forming machine 800T, actual forming pressure 460T, production 5 per minute~6;Green strength: palm I.e. rupture.
Sintering: temperature 1120 DEG C ± 10 DEG C, guipure speed: 120 ± 10mm/min;Product strength brings up to: HRB65~ 85。
Once machine parameter: rotating speed 500~1000r/min, feed 0.04~0.07mm/r, pressure 15~20kg/ cm2.Cutter CBN cutter, it is ensured that the product teeth portion depth of parallelism reaches: within ∥ 0.05.
High frequency: power 60~90kw, heat time heating time 1.2S ± 0.5S, cool time 6S ± 2S;Raising teeth portion intensity: HRC35~47, antiwear property strengthens.
Tempering: temperature 180 DEG C ± 5 DEG C, time 1h, eliminate interiors of products stress after high frequency.
Shaping: forcing press 500T, actual shaping pressure 200T, improves the every dimensional accuracy of product.
Secondary machine: rotating speed 800~1200r/min, feed 0.04~0.07mm/r, pressure 3~7kg/cm2.Cutter Tool CBN cutter, it is ensured that three boss flatnesses reach:Within 0.06.
Product is carried out performance detection, and parameter is: hot strength 30kgf/mm2Above;Percentage elongation more than 1%;Charpy impact Value 1kgf*mm/cm2
Although the present invention describes according to above-mentioned detailed description of the invention, but the invention thought of the present invention not only limiting Invent in this, the repacking of any utilization inventive concept, all will include in this patent scope of patent protection.

Claims (6)

1. the preparation method of an automobile engine three projective table type timing sprocket, it is characterised in that technique is: shape sintering Once machining high frequency tempering shaping secondary machine;Wherein,
Shape: forming machine 800T, actual forming pressure 460T, production 5 per minute~6;Green strength: palm i.e. ruptures;
Sintering: temperature 1120 DEG C ± 10 DEG C, guipure speed: 120 ± 10mm/min;Product strength: HRB65~85;
Once machining: rotating speed 500~1000r/min, feed 0.04~0.07mm/r, pressure 15~20kg/cm2
High frequency: power 60~90kw, heat time heating time 1.2S ± 0.5S, cool time 6S ± 2S;Teeth portion intensity: HRC35~47;
Tempering: temperature 180 DEG C ± 5 DEG C, time 1h, eliminate interiors of products stress after high frequency;
Shaping: forcing press 500T, actual shaping pressure 200T, improves the every dimensional accuracy of product;
Secondary machine: rotating speed 800~1200r/min, feed 0.04~0.07mm/r, pressure 3~7kg/cm2
The preparation method of automobile engine three projective table type timing sprocket the most according to claim 1, it is characterised in that described Three projective table type timing sprockets be powder metallurgy timing sprocket, its powder metallurgy matrix material consists of: copper: 0.5 ~ 3%, nickel: 1 ~ 5%, carbon: 0 ~ 0.8%, impurity: 2% is maximum, ferrum: surplus.
The preparation method of automobile engine three projective table type timing sprocket the most according to claim 1, it is characterised in that once Machine cutter is CBN cutter, it is ensured that the product teeth portion depth of parallelism reaches: within ∥ 0.05.
The preparation method of automobile engine three projective table type timing sprocket the most according to claim 1, it is characterised in that secondary Mach cutter is CBN cutter, it is ensured that three boss flatnesses reach:Within 0.06.
The preparation method of automobile engine three projective table type timing sprocket the most according to claim 1, it is characterised in that described Three projective table type timing sprockets include the teeth portion (2) being located at outer rim, the baseplane (1) being connected with centre bore, and be uniformly located at Three boss (3) on baseplane (1), it is 0.1 ~ 0.2mm that boss (3) exceeds the height of baseplane (1).
The preparation method of automobile engine three projective table type timing sprocket the most according to claim 1, it is characterised in that described Hot strength 30kgf/mm of three projective table type timing sprockets2Above;Percentage elongation more than 1%;Charp impact value 1kgf*mm/cm2
CN201610626703.4A 2016-08-03 2016-08-03 A kind of preparation method of three projective table type timing sprocket of automobile engine CN106238733B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003113402A (en) * 2001-10-02 2003-04-18 Porite Taiwan Co Ltd Method for manufacturing bevel gear, method for manufacturing gear blank of bevel gear, gear blank of bevel gear and die for manufacturing gear blank of bevel gear
CN102049519A (en) * 2010-12-31 2011-05-11 江苏双峰粉末冶金制品有限公司 Manufacturing method of powder metallurgy chain wheel
CN105014077A (en) * 2014-04-17 2015-11-04 东睦新材料集团股份有限公司 Preparation method of powder metallurgical gear and chain wheel
CN105734556A (en) * 2016-02-29 2016-07-06 扬州意得机械有限公司 Surface densification processing method for powder metallurgy part

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003113402A (en) * 2001-10-02 2003-04-18 Porite Taiwan Co Ltd Method for manufacturing bevel gear, method for manufacturing gear blank of bevel gear, gear blank of bevel gear and die for manufacturing gear blank of bevel gear
CN102049519A (en) * 2010-12-31 2011-05-11 江苏双峰粉末冶金制品有限公司 Manufacturing method of powder metallurgy chain wheel
CN105014077A (en) * 2014-04-17 2015-11-04 东睦新材料集团股份有限公司 Preparation method of powder metallurgical gear and chain wheel
CN105734556A (en) * 2016-02-29 2016-07-06 扬州意得机械有限公司 Surface densification processing method for powder metallurgy part

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