CN100489138C - Balancing shaft and its forging method for engine - Google Patents
Balancing shaft and its forging method for engine Download PDFInfo
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- 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
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- shaft
- engine
- forging
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- balancing shaft
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Abstract
A balancing shaft of engine and its forging method are disclosed. The balancing shaft consists of carbon 0.47-0.55%, silicon 0.17-0.37%, manganese 0.50-0.80%, vanadium 0.01-0.03%, niobium 0.001-0.002%, phosphor<=0.035, sulfur<=0.035%, copper<=0.17% and iron residues. The process is carried out by cutting carbon steel, heating, blanking and forming to obtain blank, heating, blanking, cutting fringe and drawing slope, transferring by conveyor belt, cooling, heat treating, heat correcting and surface treating to obtain the final product. It has better quality and longer usage life, improves metal tissue structure, mechanical strength and impact toughness and saves energy resources.
Description
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, a kind of balance shaft of engine, it is characterized in that: 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).
2, a kind of forging method of balance shaft of engine according to claim 1, it is characterized in that: the carbon steel material that the design of at first balancing shaft being adopted is according to the above ratio made cuts material, again this section material is heated, make 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.
3, the forging method of balance shaft of engine according to claim 2 is characterized in that: the temperature of described heating process is 1190 ± 10 degrees centigrade.
4, the forging method of balance shaft of engine according to claim 2 is characterized in that: the temperature of described base, molding procedure 〉=1080 degree centigrade.
5, the forging method of balance shaft of engine according to claim 2 is characterized in that: described temperature 〉=860 of forging back residual heat high-temperature deformation normalizing process degree centigrade.
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
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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)
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
-
2007
- 2007-04-17 CN CNB2007100783957A patent/CN100489138C/en not_active Expired - Fee Related
Non-Patent Citations (6)
| Title |
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| 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 |
| 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 |
| 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 |
| 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 |
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| C06 | Publication | ||
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| 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 |
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| 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 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20140417 |