CN102287441A - Motorcycle engine connecting rod and manufacturing process thereof - Google Patents
Motorcycle engine connecting rod and manufacturing process thereof Download PDFInfo
- Publication number
- CN102287441A CN102287441A CN2011102178240A CN201110217824A CN102287441A CN 102287441 A CN102287441 A CN 102287441A CN 2011102178240 A CN2011102178240 A CN 2011102178240A CN 201110217824 A CN201110217824 A CN 201110217824A CN 102287441 A CN102287441 A CN 102287441A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- microcephaly
- major part
- mounting hole
- pin mounting
- 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.)
- Pending
Links
Images
Abstract
The invention discloses a motorcycle engine connecting rod and a manufacturing process thereof. The engine connecting rod is provided with a rod body, wherein a large head and a small head are arranged at the two ends of the rod body respectively; a crank pin mounting hole is formed in the large head; a piston pin mounting hole is formed in the small head; and copper layers are plated on the surfaces of the rod body, the large head and the small head, and the thickness of each copper layer is 0.05 to 0.09mm. The manufacturing process for the engine connecting rod comprises the following steps of: 1) blanking; 2) forging and pressing to form a blank; 3) performing normalizing treatment; 4) performing shot blasting treatment; 5) performing carburizing and quenching treatment; 6) performing copper plating treatment; and 7) machining to form the crank pin mounting hole and the piston pin mounting hole. Due to the addition of the copper plating treatment, the process of surface oxidation of the connecting rod is delayed, the generation opportunities of cracks are reduced, and the service life of the connecting rod is prolonged; and the connecting rod has the characteristics of low cost, long service life, light weight and the like and is easy to realize.
Description
Technical field
The invention belongs to engine art, especially relate to a kind of motorcycle and start connecting rod and manufacturing process thereof.
Background technique
Connecting rod is the vitals on the motorcycle engine, and its function is that the power that will act on the piston passes to bent axle, makes the linear reciprocating motion of piston change rotatablely moving of bent axle into.The connecting rod of present domestic motorcycle engine is for satisfying performance requirement, guarantee to have enough strength and stiffness simultaneously, do thicklyer to the shaft position, though section has adopted " worker " font structure, thinnest part also has more than 4 millimeters, the quality of connecting rod integral is bigger like this, when past renaturation is at a high speed moved, because acceleration is very huge, the acceleration maximum when top dead center and lower dead center particularly, acceleration has produced huge inertial force, acts on the very big tension and compression stress of generation on the connecting rod, so not only influence the working life of connecting rod, also influence the working life of piston and cylinder block.Cause engine speed, power not to be further enhanced, and engine vibration is also bigger.If reduce the thickness of connecting rod merely, alleviate quality, then the strength and stiffness of connecting rod can not get guaranteeing because engine link in use owing to be subjected to violent friction, cause regional area stress concentrate and temperature too high; If connecting rod shank is thinner, be subjected to stress and Temperature Influence, on the aspect of tensile stress maximum, be easy to generate crackle, and quicken the formation and the expansion of crackle, reduced the fatigue strength of connecting rod, finally cause the engine link fatigue fracture.So how to accomplish both to have alleviated the quality of connecting rod, guarantee to have enough strength and stiffness again, do not obtain technical breakthrough before this always.
The connecting rod of present domestic motorcycle engine is for satisfying performance requirement, the whole carburizing and quenching of main employing, case depth 0.62～1.2mm, and then shaft and major part position carried out intermediate frequency or high frequency normalizing, connnecting rod big end working surface hardness is 58 HRC～64 HRC, major part centre hardness HRC30～45, normalized zone surface hardness are 30HRC～45HRC.And engine link is in use owing to be subjected to violent friction, can cause regional area stress concentrate and temperature too high.More than 400 ℃ during high temperature, rod surface is prone to bluish grey patina, this is the mixture of black iron oxide (Fe3O4) and red iron oxide (Fe2O3), and this surface oxidising can increase the chance that crackle produces, and high temperature has improved the possibility of creep damage simultaneously.Therefore, if carburization process is improper, concentration of carbon is too high, forms thicker massive carbide at the workpiece sharp corner easily, has destroyed the continuity of matrix.Because the existence of massive carbide is easy to generate crackle on the aspect of tensile stress maximum, and quickens the formation and the expansion of crackle, reduced the fatigue strength of connecting rod, finally cause the engine link fatigue fracture.Select suitable carburizing and quenching parameter and prevent that the rod surface oxidation from not obtaining technical breakthrough before this always yet.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of knot both to alleviate the quality of connecting rod, guarantees that again the motorcycle with enough strength and stiffness starts connecting rod and manufacturing process thereof.
Technological scheme of the present invention is as follows: a kind of engine connecting rod of motor cycle, has shaft, be respectively arranged with major part and microcephaly at these shaft two ends, on described major part, be provided with the crank pin mounting hole, on described microcephaly, be provided with the wrist pin mounting hole, its main points are: all be coated with the copper layer at described shaft, major part and little head surface, the thickness L of this copper layer is 0.05mm～0.09mm.Adopt above structure,, increase the copper layer, can delay the process of rod surface oxidation, reduced the chance that crackle produces at described major part and microcephaly surface by copper plating treatment; Simultaneously, owing to the good heat-conductive characteristic of copper-base, can avoid the concentrations of high-temperature area.
All have groove along its length in two surfaces up and down at described shaft, this shaft cross section is " worker " font structure, and the thickness about the described shaft between two described groove bottom lands on two surfaces is 2.5mm.Adopt above structure, changed the thickness of engine link shaft, change 2.5 millimeters more than 4 millimeters into, alleviated the quality of connecting rod integral, be reduced to 155g by 185g, thereby reduced reciprocating inertial resistance by original.
A kind of manufacturing process of engine connecting rod of motor cycle is characterized in that comprising the steps: 1) blanking, selecting material for use is the low-carbon alloy steel of 20CrMo, carries out blanking according to blank dimension then; 2) forging and pressing base; 3) normalized treatment; 4) Shot Blasting; 5) carburizing and quenching is handled, described major part and microcephaly are carried out the carburizing and quenching processing, the major part and the microcephaly of engine link are placed on respectively in the dielectric heating oven with activated carburizing medium, insulation is 180 minutes in 930 ± 15 ℃ temperature, be cooled to room temperature then, described major part of this carburizing and quenching processing requirements and microcephaly's the permeable formation degree of depth is 0.5mm～1.2mm, and hardness is 58HRC～64HRC; 6) copper plating treatment is carried out copper plating treatment to described shaft, major part and microcephaly, and the copper facing bed thickness is 0.05mm～0.09mm; 7) crank pin mounting hole and wrist pin mounting hole are processed in machining respectively on described major part and microcephaly.
More than compare with existing simple whole carburizing and quenching technology, by increasing copper plating treatment, delayed the process of rod surface oxidation, reduced the chance that crackle produces.Owing to the good heat-conductive characteristic of copper-base, can avoid the concentrations of high-temperature area simultaneously.Copper plating treatment also increases the toughness of rod surface when guaranteeing connecting rod hardness.Copper plating treatment can be guaranteed the ability to bear of connecting rod under high loaded process, improves the stability of connecting rod performance, will double working life.
Beneficial effect: the present invention has delayed the process of rod surface oxidation by increasing copper plating treatment, has reduced the chance that crackle produces, and has improved working life of the present invention; Have the realization of being easy to, characteristics such as cost is low, the life-span is long, light weight.
Description of drawings
Fig. 1 is a structure intention of the present invention;
Fig. 2 is the A-A sectional view among Fig. 1;
Fig. 3 is a manufacturing process flow diagram of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
See also Fig. 1 and Fig. 2: a kind of engine connecting rod of motor cycle, has shaft 1, be respectively arranged with major part 2 and microcephaly 3 at these shaft 1 two ends, on described major part 2, be provided with crank pin mounting hole 2a, on described microcephaly 3, be provided with wrist pin mounting hole 3a, all be coated with copper layer 4 on described shaft 1, major part 2 and microcephaly 3 surfaces, the thickness L of this copper layer 4 is 0.05mm～0.09mm.
See also Fig. 2: two surfaces all have groove 1a along its length at described shaft about in the of 1, this shaft 1 cross section is " worker " font structure, and the thickness between two described groove 1a bottom lands on described shaft two surfaces about in the of 1 is 2.5mm.
In conjunction with Fig. 1 and Fig. 2 and Fig. 3: a kind of manufacturing process of engine connecting rod of motor cycle is characterized in that comprising the steps: 1) blanking, selecting material for use is the low-carbon alloy steel of 20CrMo, carries out blanking according to blank dimension then; 2) the forging and pressing base will forge into the blank that meets size in forging die after the blank heating; 3) normalized treatment, normalized treatment can make the grain refinement and the distribution of carbides homogenization of blank; 4) Shot Blasting; 5) carburizing and quenching is handled, described major part 2 and microcephaly 3 are carried out the carburizing and quenching processing, the major part 2 and the microcephaly 3 of engine link are placed on respectively in the dielectric heating oven with activated carburizing medium, insulation is 180 minutes in 930 ± 15 ℃ temperature, be cooled to room temperature then, described major part 2 of this carburizing and quenching processing requirements and microcephaly's 3 the permeable formation degree of depth is 0.3mm～1.2mm, hardness is 58HRC～64HRC, simultaneously, non-cemented zone is that the metallographic microstructure of shaft 1 part should be low-carbon martensite, do not allow the ferrite of net distribution, the metallographic microstructure of carburizing and quenching layer should be fine acicular martensite, do not allow thick or continuous net-shaped proeutectoid cementite, should meet 1～5 grade and 1～3 grade of second level figure of the first rank figure among the JB/T8118.2; 6) copper plating treatment is carried out copper plating treatment to described shaft 1, major part 2 and microcephaly 3, and the copper facing bed thickness is 0.05mm～0.09mm; 7) crank pin mounting hole 2a and wrist pin mounting hole 3a are processed in machining respectively on described major part 2 and microcephaly 3.
The above only is preferred embodiment of the present invention, is not restriction with the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. engine connecting rod of motor cycle, has shaft (1), be respectively arranged with major part (2) and microcephaly (3) at this shaft (1) two ends, on described major part (2), be provided with crank pin mounting hole (2a), on described microcephaly (3), be provided with wrist pin mounting hole (3a), it is characterized in that: all be coated with copper layer (4) on described shaft (1), major part (2) and microcephaly (3) surface, the thickness L of this copper layer (4) is 0.05mm～0.09mm.
2. a kind of engine connecting rod of motor cycle according to claim 1, it is characterized in that: all have groove (1a) along its length in two surfaces up and down at described shaft (1), this shaft (1) cross section is " worker " font structure, and described shaft (1) thickness between two described grooves (1a) bottom land on two surfaces up and down is 2.5mm.
3. the manufacturing process of an engine connecting rod of motor cycle as claimed in claim 1 is characterized in that comprising the steps: 1) blanking, selecting material for use is the low-carbon alloy steel of 20CrMo, carries out blanking according to blank dimension then; 2) forging and pressing base; 3) normalized treatment; 4) Shot Blasting; 5) carburizing and quenching is handled, described major part (2) and microcephaly (3) are carried out the carburizing and quenching processing, the major part (2) and the microcephaly (3) of engine link are placed on respectively in the dielectric heating oven with activated carburizing medium, insulation is 180 minutes in 930 ± 15 ℃ temperature, be cooled to room temperature then, described major part of this carburizing and quenching processing requirements (2) and microcephaly's (3) the permeable formation degree of depth is 0.3mm～1.2mm, and hardness is 58HRC～64HRC; 6) copper plating treatment is carried out copper plating treatment to described shaft (1), major part (2) and microcephaly (3), and the copper facing bed thickness is 0.05mm～0.09mm; 7) crank pin mounting hole (2a) and wrist pin mounting hole (3a) are processed in machining respectively on described major part (2) and microcephaly (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102178240A CN102287441A (en) | 2011-08-01 | 2011-08-01 | Motorcycle engine connecting rod and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102178240A CN102287441A (en) | 2011-08-01 | 2011-08-01 | Motorcycle engine connecting rod and manufacturing process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102287441A true CN102287441A (en) | 2011-12-21 |
Family
ID=45334114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102178240A Pending CN102287441A (en) | 2011-08-01 | 2011-08-01 | Motorcycle engine connecting rod and manufacturing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102287441A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494106A (en) * | 2011-12-26 | 2012-06-13 | 重庆清平机械厂 | Process for manufacturing 20 CrMo carburizing steel gear |
| CN104141600A (en) * | 2014-07-01 | 2014-11-12 | 安徽美芝制冷设备有限公司 | Compressor connecting rod and production method thereof |
| CN105057997A (en) * | 2015-08-07 | 2015-11-18 | 无锡桥阳机械制造有限公司 | Camshaft machining and manufacturing process adopting Zn-Al-Ti-Mg series alloy steel as material |
| CN107130094A (en) * | 2017-06-23 | 2017-09-05 | 江苏丰东热处理及表面改性工程技术研究有限公司 | A kind of automobile connecting bar throwing pill strengthening technique |
| CN107606148A (en) * | 2017-09-25 | 2018-01-19 | 江苏赫曦新能源有限公司 | A kind of pressurized crankcase of no oily piston |
| CN109099052A (en) * | 2018-09-14 | 2018-12-28 | 江苏三科精工机械有限公司 | A kind of swing arm connecting rod |
| CN109468446A (en) * | 2018-11-30 | 2019-03-15 | 安庆中船动力配套有限公司 | A kind of connecting rod shot-blast process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1192391A (en) * | 1997-03-04 | 1998-09-09 | 大众汽车有限公司 | Bearing material in connecting-rod eye |
| CN101169151A (en) * | 2007-10-16 | 2008-04-30 | 韩鸿滨 | Lightweight connecting bar |
| CN101260903A (en) * | 2008-04-07 | 2008-09-10 | 常州久弘金属材料有限公司 | IC link rod manufacture process |
| CN101424296A (en) * | 2008-12-05 | 2009-05-06 | 浙江长宏机电有限公司 | Method for processing crank connecting rod |
| JP2010150576A (en) * | 2008-12-24 | 2010-07-08 | Yamaha Motor Co Ltd | Connecting rod, internal combustion engine, transportation apparatus, and method for manufacturing the connecting rod |
-
2011
- 2011-08-01 CN CN2011102178240A patent/CN102287441A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1192391A (en) * | 1997-03-04 | 1998-09-09 | 大众汽车有限公司 | Bearing material in connecting-rod eye |
| CN101169151A (en) * | 2007-10-16 | 2008-04-30 | 韩鸿滨 | Lightweight connecting bar |
| CN101260903A (en) * | 2008-04-07 | 2008-09-10 | 常州久弘金属材料有限公司 | IC link rod manufacture process |
| CN101424296A (en) * | 2008-12-05 | 2009-05-06 | 浙江长宏机电有限公司 | Method for processing crank connecting rod |
| JP2010150576A (en) * | 2008-12-24 | 2010-07-08 | Yamaha Motor Co Ltd | Connecting rod, internal combustion engine, transportation apparatus, and method for manufacturing the connecting rod |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494106A (en) * | 2011-12-26 | 2012-06-13 | 重庆清平机械厂 | Process for manufacturing 20 CrMo carburizing steel gear |
| CN104141600A (en) * | 2014-07-01 | 2014-11-12 | 安徽美芝制冷设备有限公司 | Compressor connecting rod and production method thereof |
| CN105057997A (en) * | 2015-08-07 | 2015-11-18 | 无锡桥阳机械制造有限公司 | Camshaft machining and manufacturing process adopting Zn-Al-Ti-Mg series alloy steel as material |
| CN107130094A (en) * | 2017-06-23 | 2017-09-05 | 江苏丰东热处理及表面改性工程技术研究有限公司 | A kind of automobile connecting bar throwing pill strengthening technique |
| CN107606148A (en) * | 2017-09-25 | 2018-01-19 | 江苏赫曦新能源有限公司 | A kind of pressurized crankcase of no oily piston |
| CN109099052A (en) * | 2018-09-14 | 2018-12-28 | 江苏三科精工机械有限公司 | A kind of swing arm connecting rod |
| CN109468446A (en) * | 2018-11-30 | 2019-03-15 | 安庆中船动力配套有限公司 | A kind of connecting rod shot-blast process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102287441A (en) | Motorcycle engine connecting rod and manufacturing process thereof | |
| EP2744923B1 (en) | Cylinder liner and cast iron alloy | |
| CN106541139B (en) | A kind of preparation method of P/M cam | |
| US7905018B2 (en) | Production method for sintered gear | |
| CN100503893C (en) | Process for producing gear with hard bainite structure on surface | |
| US7309465B2 (en) | Sintered sprocket for silent chain and production method therefor | |
| CN105018824B (en) | A kind of preparation method of P/M cam | |
| CN101424296B (en) | Method for processing crank connecting rod | |
| CN102407333A (en) | Powder metallurgy stator of car steering pump and production method thereof | |
| CN102494057B (en) | Automobile brake disc and manufacturing method thereof | |
| CN102296167A (en) | Cryogenic treatment process for 9SiCr die steel used for railway freight cars | |
| CN102877073A (en) | Technology for processing CrNiMo series steel material | |
| CN103451551B (en) | Preparation method of cast steel perforator top tip with high-temperature resistance and corrosion resistance | |
| CN102562349B (en) | The manufacture method of the piston of internal-combustion engine and this piston and slide member | |
| JP2007262536A (en) | Sintered gear and its production method | |
| CN102230131A (en) | 38CrMoAl steel and preparation method thereof | |
| CN106541141B (en) | A kind of manufacturing method of P/M cam | |
| CN106319338A (en) | Self-lubricating rolling bearing and preparing method thereof | |
| CN104451705A (en) | Gear manufacturing process | |
| KR101173054B1 (en) | Alloy compound composite for connecting rod and menufacturing method for connecting rod using it | |
| CN104612965B (en) | A kind of motor turning pump rotor | |
| CN105420609A (en) | Preparation method of anti-fracture engine crankshaft | |
| CN104832425A (en) | Nodular-cast-iron-based copper-sleeve-inlaid cylinder body | |
| CN104073711A (en) | Wear-resisting air compressor cylinder sleeve material composition and cylinder sleeve preparation method | |
| Dorofeev et al. | Powder forging: Today and tomorrow |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: CHONGQING XIN GANJUE MOTORCYCLE CO., LTD. Free format text: FORMER OWNER: CHONGQING SOKON INDUSTRY GROUP CO., LTD. Effective date: 20120412 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 400033 SHAPINGBA, CHONGQING TO: 402260 JIANGJIN, CHONGQING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20120412 Address after: 402260, Jiangjin Road, Chongqing District, Jiujiang new road, Dongfeng well-off Automobile Co., Ltd. Planning Department Applicant after: Chongqing New Feeling Motorcycle Co., Ltd. Address before: 400033, No. 2 ho Xi Road, wellhead Town, Shapingba District, Chongqing Applicant before: Chongqing Xiaokang Industry Group Co., Ltd. |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111221 |