CN100489138C - Balancing shaft and its forging method for engine - Google Patents

Balancing shaft and its forging method for engine Download PDF

Info

Publication number
CN100489138C
CN100489138C CNB2007100783957A CN200710078395A CN100489138C CN 100489138 C CN100489138 C CN 100489138C CN B2007100783957 A CNB2007100783957 A CN B2007100783957A CN 200710078395 A CN200710078395 A CN 200710078395A CN 100489138 C CN100489138 C CN 100489138C
Authority
CN
China
Prior art keywords
balance shaft
forging
engine
blank
billet
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CNB2007100783957A
Other languages
Chinese (zh)
Other versions
CN101029371A (en
Inventor
孙国奉
张松满
孙国敏
张宣明
杨春玥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SANLIAN FORGING CO Ltd WENZHOU
Original Assignee
SANLIAN FORGING CO Ltd WENZHOU
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 SANLIAN FORGING CO Ltd WENZHOU filed Critical SANLIAN FORGING CO Ltd WENZHOU
Priority to CNB2007100783957A priority Critical patent/CN100489138C/en
Publication of CN101029371A publication Critical patent/CN101029371A/en
Application granted granted Critical
Publication of CN100489138C publication Critical patent/CN100489138C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Forging (AREA)

Abstract

本发明公开了一种发动机平衡轴及其锻造方法,其化学成分以重量计算,构成为:0.47-0.55%碳、0.17-0.37%硅、0.50-0.80%锰、0.01-0.03%钒、0.001-0.002%铌、磷不大于0.035%、硫不大于0.035%、铜不大于0.17%、余量为铁。其锻造方法是:首先将平衡轴采用的按上述比例制成的碳素钢材料进行截料,再对该截料进行加热及制坯、成型工序制成平衡轴坯料;然后切除平衡轴坯料的毛边及坯料两端头的拔模斜度,将切边后的平衡轴坯料通过输送带输送使该坯料自然冷却而再进行热处理工艺、热校正、表面处理工序而制得发动机平衡轴锻件。此构成和制造方法显著改善了钢的金属组织结构,提高了锻件的机械强度、冲击韧性,且节约了能源。从而提高了产品的质量,延长了产品的使用寿命。The invention discloses an engine balance shaft and a forging method thereof. Its chemical composition is calculated by weight, and consists of: 0.47-0.55% carbon, 0.17-0.37% silicon, 0.50-0.80% manganese, 0.01-0.03% vanadium, 0.001- 0.002% niobium, phosphorus not more than 0.035%, sulfur not more than 0.035%, copper not more than 0.17%, and the balance being iron. The forging method is as follows: first cut off the carbon steel material used for the balance shaft according to the above ratio, then heat the cut material, make a billet, and form a blank of the balance shaft; then cut off the balance shaft blank The draft angle of the raw edge and the two ends of the billet, the trimmed balance shaft billet is transported by the conveyor belt, the billet is naturally cooled, and then the heat treatment process, heat correction, and surface treatment processes are performed to obtain the engine balance shaft forging. The composition and manufacturing method significantly improve the metal structure of the steel, increase the mechanical strength and impact toughness of the forging, and save energy. Thereby improving the quality of the product and prolonging the service life of the product.

Description

Balancing shaft of Engine and its forging method
One, technical field
The present invention relates to balancing shaft and forging method thereof that a kind of motor car engine is used.
Two, background technology
Balancing shaft is the key part in the auxiliary balance mechanism on automobile engine crankshaft next door, when bent axle rotates, and crankshaft toothed wheel driven equilibrium shaft gear and make the balancing shaft rotation.At this moment, reciprocal inertia force or its moment of the centrifugal force of the generation of the counterbalance weight on the balancing shaft or its moment and bent axle generation balance each other.Owing to the effect of balancing shaft, effectively eliminated the vibration and the noise of engine, improved the comfortableness of taking, increased the weather resistance of automobile and engine.At present, material and forging method thereof that balance shaft of engine adopts are: adopt common medium-carbon steel, make the balancing shaft forging through cutting a material, heating, base, moulding, side cut, correction, thermal treatment, surface treatment procedure.Because mild steel material impurity is more, causes the metallographic structure of balancing shaft forging not good enough, mechanical property is relatively poor, thereby has shortened the work-ing life of product.
Three, summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, and a kind of balancing shaft of Engine and its forging method that can improve balancing shaft forging mechanical property is provided.
Purpose of the present invention realizes by following technical solution: a kind of balance shaft of engine, the chemical ingredients of described engine balance shaft material is calculated by weight, and it constitutes: 0.47-0.55% carbon, 0.17-0.37% silicon, 0.50-0.80% manganese, 0.01-0.03% vanadium, 0.001-0.002% niobium, phosphorus are not more than 0.035%, sulphur is not more than 0.035%, copper is not more than 0.17%, surplus is an iron.
The forging method of above-mentioned balance shaft of engine is: the carbon steel material that the design of at first balancing shaft being adopted is according to the above ratio made cuts material, this section material is heated again, and makes the balancing shaft blank through base, molding procedure again; Adopt the negative deviation cutting die with the burr of excision balancing shaft blank and the pattern draft of blank two ends then, balancing shaft blank after cutting edge carried by conveying belt make this blank naturally cooling be transported to Equipment for Heating Processing to forge back residual heat high-temperature deformation normalizing process, make the engine balance forging shaft through thermal recalibration, surface treatment procedure again.
After adopting the present invention,, can obtain the inherent fine grain steel, significantly improve the metal structure structure of steel, improve the physical strength of forging owing to added vanadium (V), niobium (Nb) metallic element in carbon steel (No. 50) material that balancing shaft adopts.In forging process, can improve Heating temperature, and the crystal grain of steel is still tiny,--residual heat high-temperature deformation normalizing process after----promptly forges has improved the impelling strength of forging, and has saved the energy so can utilize residual forging heat directly to implement next step thermal treatment process through naturally cooling.Thereby improved the quality of product, prolonged the work-ing life of product.
Four, embodiment
Balance shaft of engine of the present invention, the chemical ingredients of described engine balance shaft material is calculated by weight, and it constitutes: 0.47-0.55% carbon (C), 0.17-0.37% silicon (Si), 0.50-0.80% manganese (Mn), 0.01-0.03% vanadium (V), 0.001-0.002% niobium (Nb), phosphorus (P) are not more than 0.035%, sulphur (S) is not more than 0.035%, copper (Cu) is not more than 0.17%, surplus is iron (Fe).As not containing vanadium (V), niobium (Nb) two elements, then this material is called steel No. 50 in the chemical ingredients of above-mentioned engine balance shaft material; As contain vanadium (V), niobium (Nb) two elements, then this material is called special No. 50 steel.
Be the physical strength of raising balancing shaft forging, necessary its crystallization crystal grain of refinement, so special No. 50 steel of innovative design promptly add metallic element vanadium (V), niobium (Nb) in No. 50 steel, this two element also can be described as grain-refining agent.Vanadium (V), niobium (Nb) can form compound VC, NbC with carbon (C) atom in the steel, and are present in austenite grain boundary with the particle of disperse phase, hindering growing up of austenite crystal, thereby refinement crystal grain.Make steel in forging process, recrystallize does not take place in austenite crystal, directly changes ferrite into, and the result has formed tangible thinning microstructure.The mechanism of this crystal grain thinning, can also set forth with crystal boundary iron atom self-diffusion theory: after alloying element vanadium (V), niobium (Nb) etc. dissolves in austenite, can strengthen the linkage force between atoms metal, reduce the self-diffusion coefficient of iron atom, thereby the transition process that the self-diffusion of crystal boundary by iron atom produced is obstructed, the grain growth speed that slowed down has finally obtained tiny austenite crystal.Thereby significantly improved the metal structure structure of steel, improved the physical strength of forging.
The standard weave of balancing shaft forging is a perlite, and content of pearlite in alloy is not less than 60%; Its hardness is 220-250HB, tensile strength (σ b) more than or equal to 800MPa, yield strength (σ s) more than or equal to 490MPa.
The forging method of above-mentioned balance shaft of engine is: the carbon steel material (adopting the bar stapling machine) that the design of at first balancing shaft being adopted is according to the above ratio made cuts material, again this section material (employing intermediate frequency furnace) is heated, pass through base (adopting punch press and air hammer) again, moulding (adopting 1000 tons or 1600 tons of pressing machinees) operation is made the balancing shaft blank; (pass through punch press) then and adopt the negative deviation cutting die with the burr of excision balancing shaft blank and the pattern draft (i.e. Chuan Xin side cut operation) of blank two ends, make this blank naturally cooling be transported to Equipment for Heating Processing (employing normalizing furnace) by conveying belt (about 4 meters) conveying the balancing shaft blank after cutting edge and heat-treat technology (i.e. residual heat high-temperature deformation normalizing process after Chuan Xin the forging), pass through thermal recalibration again and (adopt punch press, to eliminate distortion), surface treatment (adopting shot-blasting machine) operation and make the engine balance forging shaft to remove surface oxide layer.At last this engine balance forging shaft is carried out precision work (employing machining center) and makes the balance shaft of engine product, carry out rustproof packing again and dispatch from the factory.
Wherein, forging back residual heat high-temperature deformation normalizing process is a kind of suitable reduction forging and pressing deformation final temperature, carries out the thermomechanical treatment technology of air cooling then, can shorten and simplify the thermal cycle, has saved the energy, has improved production efficiency.This technology can effectively improve the impelling strength of forging and reduce brittle transition temperature, improves its antiwear property and fatigue resistance.
The temperature of above-mentioned (intermediate frequency furnace) heating process can be 1190 ± 10 degrees centigrade; The temperature of base, molding procedure 〉=1080 degree centigrade; Forge temperature 〉=860 degree centigrade of back residual heat high-temperature deformation normalizing process.

Claims (5)

1、一种发动机平衡轴,其特征在于:所述的发动机平衡轴材料的化学成分以重量计算,其构成为:0.47—0.55%碳(C)、0.17—0.37%硅(Si)、0.50—0.80%锰(Mn)、0.01—0.03%钒(V)、0.001—0.002%铌(Nb)、磷(P)不大于0.035%、硫(S)不大于0.035%、铜(Cu)不大于0.17%、余量为铁(Fe)。1. An engine balance shaft, characterized in that: the chemical composition of the engine balance shaft material is calculated by weight, and it consists of: 0.47-0.55% carbon (C), 0.17-0.37% silicon (Si), 0.50- 0.80% manganese (Mn), 0.01-0.03% vanadium (V), 0.001-0.002% niobium (Nb), phosphorus (P) not more than 0.035%, sulfur (S) not more than 0.035%, copper (Cu) not more than 0.17% %, and the balance is iron (Fe). 2、一种根据权利要求1所述的发动机平衡轴的锻造方法,其特征在于:首先将平衡轴采用的按上述比例设计制成的碳素钢材料进行截料,再对该截料进行加热,再经过制坯、成型工序制成平衡轴坯料;然后采用负偏差切边模以切除平衡轴坯料的毛边及坯料两端头的拔模斜度,将切边后的平衡轴坯料通过输送带输送使该坯料自然冷却而被输送到热处理设备进行锻后余热高温形变正火工艺,再经过热校正、表面处理工序而制得发动机平衡轴锻件。2. A method for forging an engine balance shaft according to claim 1, characterized in that: first cut off the carbon steel material used for the balance shaft and designed according to the above ratio, and then heat the cut material , and then make the balance shaft blank through the blank making and forming process; then use the negative deviation trimming die to cut off the burr of the balance shaft blank and the draft angle of the two ends of the blank, and pass the trimmed balance shaft blank through the conveyor belt The billet is transported to cool naturally and then transported to heat treatment equipment for high-temperature deformation normalizing process with waste heat after forging, and then undergoes thermal correction and surface treatment processes to obtain engine balance shaft forgings. 3、根据权利要求2所述的发动机平衡轴的锻造方法,其特征在于:所述的加热工序的温度为1190±10摄氏度。3. The forging method of the engine balance shaft according to claim 2, characterized in that: the temperature of the heating process is 1190±10 degrees Celsius. 4、根据权利要求2所述的发动机平衡轴的锻造方法,其特征在于:所述的制坯、成型工序的温度≥1080摄氏度。4. The forging method of the engine balance shaft according to claim 2, characterized in that the temperature of the billet making and forming process is ≥1080 degrees Celsius. 5、根据权利要求2所述的发动机平衡轴的锻造方法,其特征在于:所述的锻后余热高温形变正火工艺的温度≥860摄氏度。5. The forging method of the engine balance shaft according to claim 2, characterized in that: the temperature of the high-temperature deformation normalizing process with waste heat after forging is ≥860 degrees Celsius.
CNB2007100783957A 2007-04-17 2007-04-17 Balancing shaft and its forging method for engine Expired - Fee Related CN100489138C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2007100783957A CN100489138C (en) 2007-04-17 2007-04-17 Balancing shaft and its forging method for engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2007100783957A CN100489138C (en) 2007-04-17 2007-04-17 Balancing shaft and its forging method for engine

Publications (2)

Publication Number Publication Date
CN101029371A CN101029371A (en) 2007-09-05
CN100489138C true CN100489138C (en) 2009-05-20

Family

ID=38714923

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2007100783957A Expired - Fee Related CN100489138C (en) 2007-04-17 2007-04-17 Balancing shaft and its forging method for engine

Country Status (1)

Country Link
CN (1) CN100489138C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009036067A1 (en) * 2009-08-04 2011-02-10 Schaeffler Technologies Gmbh & Co. Kg Method for producing a balancing shaft
CN102989943A (en) * 2012-08-22 2013-03-27 昌利锻造有限公司 Processing method of automotive balancing shaft
CN102989983A (en) * 2012-08-22 2013-03-27 昌利锻造有限公司 Forging method of automobile engine crankshaft
CN102825205A (en) * 2012-09-20 2012-12-19 江苏金源锻造股份有限公司 Forging method of balance shaft of engine
CN103639647B (en) * 2013-11-18 2016-04-06 浙江跃进机械有限公司 The production technology of motorcycle lower link plate
CN103643016A (en) * 2013-11-18 2014-03-19 浙江跃进机械有限公司 Production method of motorcycle lower yoke plate
CN106424495A (en) * 2015-08-13 2017-02-22 温州三联锻造有限公司 Automobile gearbox hub forged piece and forging method thereof
CN106427549A (en) * 2015-08-13 2017-02-22 温州三联锻造有限公司 Retaining ring of automobile damper and forging method of retaining ring

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
LZ 50钢火车轴热加工连续生产线的研制. 王树海等.工业炉,第24卷第4期. 2002 *
微合金中碳非调质钢的分析与综述. 陆在庆等.机械工程材料,第3期. 1985 *
非调质微合金锻件用钢. 章洪涛等.机械工程材料,第2期. 1987 *

Also Published As

Publication number Publication date
CN101029371A (en) 2007-09-05

Similar Documents

Publication Publication Date Title
CN100489138C (en) Balancing shaft and its forging method for engine
JP5245997B2 (en) High strength hot forged non-tempered steel with excellent toughness and method for producing the same
CN109252104B (en) High-speed steel and production method thereof
JP5649111B2 (en) Press mold made of spheroidal graphite cast iron and method for producing the same
WO2011037210A1 (en) High-strength high-toughness cast steel material and manufacturing method therefor
JP2010503770A (en) Steel alloys, holders or holder details for plastic forming tools, toughened blanks for holders or holder details, steel alloy production methods
CN104625665A (en) Alloy material and production process of gear
WO2007000888A1 (en) Hot-forged products excellent in fatigue strength, process for production thereof, and machine structural parts
CN113737106A (en) Die steel for 1500MPa hot stamping part cold trimming punching cutter and preparation method thereof
CN115537646A (en) Non-quenched and tempered steel and manufacturing method thereof
WO2014027463A1 (en) Steel material for high frequency induction hardening
CN104532150B (en) Economical and ultra-wide saw steel and preparation method thereof
CN115449703B (en) Isothermal annealing gear steel bar applicable to cold forging and manufacturing method thereof
EP3272896B1 (en) Age-hardenable steel, and method for manufacturing components using age-hardenable steel
WO2002077309A1 (en) Cast steel and metal mold for casting
JP4084462B2 (en) Free-cutting hot-worked steel and its manufacturing method
CN115279932B (en) Steel for hot working die, and method for producing same
JP4946328B2 (en) Method for manufacturing age-hardening machine parts
CN106167881A (en) Microalloyed steel for forging waste heat quenching
JP3846156B2 (en) Steel sheet for high-strength press-formed part of automobile and method for producing the same
CN101821413A (en) Be used to make the steel of the machine parts of formed solid
JPH0535203B2 (en)
CN106011628B (en) A kind of high tenacity steel automobile hardware stamping part and its preparation technology
JP3764274B2 (en) Free-cutting hot-worked steel material and rough profile, manufacturing methods thereof, free-cutting hot-worked product, and manufacturing method thereof
JP6583484B2 (en) Nitriding steel

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
EE01 Entry into force of recordation of patent licensing contract

Assignee: Wuhu Sanlian Forge Co., Ltd.

Assignor: Sanlian Forging Co., Ltd., Wenzhou

Contract fulfillment period: 2008.8.1 to 2013.7.31 contract change

Contract record no.: 2009340000310

Denomination of invention: Balancing shaft and its forging method for engine

Granted publication date: 20090520

License type: Exclusive license

Record date: 2009.9.10

LIC Patent licence contract for exploitation submitted for record

Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.8.1 TO 2013.7.31; CHANGE OF CONTRACT

Name of requester: WUHU SANLIAN FORGNG CO., LTD.

Effective date: 20090910

C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090520

Termination date: 20140417