CN103341730B - A kind of cylinder holes processing method - Google Patents
A kind of cylinder holes processing method Download PDFInfo
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- CN103341730B CN103341730B CN201310266008.8A CN201310266008A CN103341730B CN 103341730 B CN103341730 B CN 103341730B CN 201310266008 A CN201310266008 A CN 201310266008A CN 103341730 B CN103341730 B CN 103341730B
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- cylinder holes
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- top dead
- dead centre
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Abstract
The present invention is a kind of cylinder holes processing method, and the method comprises pre-treatment, Surface Texture, post processing and detection.Pre-treatment obtains processing front surface; Surface Texture goes out texture features in cylinder holes Surface Machining; The burr on cylinder holes surface is removed in post processing; Detect operation difficulty action accomplishment to detect.The beneficial effect of the inventive method is, significantly improves the tribological property of cylinder holes-Piston Ring, and cylinder holes surface abrasion resistance is strengthened, and make fuel oil consume reduction by 1 ~ 3% for engine, engine oil consumption reduces by 30 ~ 50%.
Description
Technical field
The present invention relates to a kind of cylinder holes processing method, belong to machine-building and automotive field.
Background technology
Cylinder holes-Piston Ring is one of typical friction pair in engine, determine serviceability and the life-span of engine, and the texture structure on cylinder holes surface is directly connected to the discharge performance of engine.The processing of current engine cylinder hole generally adopts mechanical honing technique, and this technique improves the lubrication state between cylinder holes-Piston Ring to a certain extent.In recent years, the cylinder holes laser texturing technology that the development along with high energy technology occurs again, it has the advantages such as process time is short, thermal stress is little, controllability is good.
CN200510116292 discloses and a kind ofly bears laser honing instrument friction load face processing micro groove structure at workpiece.This patent does not propose the surface requirements of processing front cylinder holes, and is in fact very crucial, and choosing of this patent laser machining site does not consider that the wearing and tearing on cylinder holes surface distribute, and specific aim is not enough.In addition, the micro groove structure in this patent is oversize, thus not microcosmic lubricating effect, and micro groove structure difficulty of processing is large and the lubrication antifriction effect of correspondence is not better than cavity.
Engine cylinder hole wear condition is everywhere not identical, and some places very easily occur to wear and tear and affect performance and the life-span of engine.A lot of research shows that the wearing and tearing of cylinder holes mainly occur in top dead centre region and the region with Contact of Piston Skirt.
Summary of the invention
The object of the invention is the tribological property improving cylinder holes-Piston Ring, strengthen cylinder holes surface abrasion resistance, finally make engine fuel consume reduction by 1 ~ 3%, engine oil consumption reduces by 30 ~ 50%.
The implementation step of a kind of cylinder holes processing method of the present invention comprises: pre-treatment, Surface Texture, post processing and detection.
Pre-treatment is obtained by mechanical honing technique, and the surface topography parameters after pre-treatment requires: Rpk≤0.1 μm, Rk≤0.15 μm, Rvk≤0.3 μm, Mr1≤6%, Mr2 >=85%.
Surface Texture.In cylinder holes, carry out Surface Texture, target area is top dead centre district and Pei Mo district, piston skirt, and top dead centre district covers the top dead centre of cylinder holes, and Pei Mo district, piston skirt covers contact area in cylinder holes and piston relative motion; Above-mentioned two region surface texture parameters, there is difference in cavity diameter, the cavity degree of depth and area ratio/occupancy ratio, the Surface Texture parameter in top dead centre district is: cavity diameter 30 μm ~ 100 μm, the cavity degree of depth 5 μm ~ 8 μm, area ratio/occupancy ratio 10% ~ 30%; The Surface Texture parameter in Pei Mo district, piston skirt is: cavity diameter 30 μm ~ 100 μm, the cavity degree of depth 4 μm ~ 6 μm, area ratio/occupancy ratio 10% ~ 20%.Wherein cavity diameter is the least square diameter of cavity pattern, and the cavity degree of depth is cavity pattern deepest point distance cylinder holes surface distance, and area ratio/occupancy ratio is the percentage that in texture area, nick cavity area accounts for this region gross area.Finished surface texture is implemented by laser, adopt the Nd:YAG continuous solid body laser instrument of diode pumping, pumping current 16 ~ 19A, pulse frequency 1400 ~ 1800Hz, umber of pulse 1 ~ 7 time, assist gas is nitrogen, and air pressure is 0.05 ~ 1.00MPa, wherein pulse frequency is the laser pulse number that laser instrument sends each second, the laser pulse sum of umber of pulse needed for the single cavity of processing.Top dead centre district and Pei Mo district, piston skirt meet following relation, and the distance on top dead centre district to cylinder holes top is L2, and this region height is L3; Pei Mo district, piston skirt is positioned at below top dead centre district, and district is connected with top dead centre, and it is highly L4, and width is L5; Pei Mo district, piston skirt covers cylinder holes and the region contacted in piston relative motion; L2 is 7 ~ 15%, L3 of cylinder holes height overall L6 be 17 ~ 25%, L4 be 40 ~ 55%, L5 is 20% ~ 40% of cylinder holes girth; Pei Mo district, piston skirt is two, and the relative cylinder holes axisymmetrical in Pei Mo district, two piston skirts is arranged.
Post processing.Cylinder holes surface spikes is removed in post processing, makes surperficial Rpk value be less than 0.1 μm.Post processing adopts glossing, and the parameter of above-mentioned glossing is: the first stage is, bonding agent is resin, material green silicon carbide doped diamond, soft emery stick in granularity 320#, honing pressure 1.0MPa, speed of mainshaft 150rpm, vertical speed 15m/min, honing time 10s; Second stage is, bonding agent is resin, and material is green silicon carbide, the ultra-soft emery stick of granularity 320#, honing pressure 1.0MPa, speed of mainshaft 150rpm, vertical speed 15m/min, honing time 25s.
Detect.Processing qualified condition is, cylinder holes surface actual measurement parameter and design load deviation are all less than 10%.
The invention has the advantages that: the tribological property significantly improving cylinder holes-Piston Ring, cylinder holes surface abrasion resistance is strengthened, and make fuel oil consume reduction by 1 ~ 3% for engine, engine oil consumption reduces by 30 ~ 50%.
Accompanying drawing explanation
Fig. 1 is that cylinder holes cutting flattens schematic diagram.
In figure, 1, cylinder holes; 2, L2; 3, L3; 4, L4; 5, L5; 6, L6; 7, top dead centre district; 8, Pei Mo district, piston skirt;
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is that cylinder holes 1 cutting flattens schematic diagram, and become two parts after cylinder holes 1 cutting, the texture area on two parts is identical.
Pre-treatment is obtained by mechanical honing technique, and the surface topography parameters after pre-treatment requires: Rpk≤0.1 μm, Rk≤0.15 μm, Rvk≤0.3 μm, Mr1 < 6%, Mr2 > 85%.
In cylinder holes 1, carry out Surface Texture, target area is top dead centre district 7 and Pei Mo district, piston skirt 8, and top dead centre district 7 covers the top dead centre of cylinder holes 1, and Pei Mo district, piston skirt 8 covers cylinder holes 1 and contact area in piston relative motion; Above-mentioned two region surface texture parameters, there is difference in cavity diameter, the cavity degree of depth and area ratio/occupancy ratio, the Surface Texture parameter in top dead centre district 7 is: cavity diameter 30 μm ~ 100 μm, the cavity degree of depth 5 μm ~ 8 μm, area ratio/occupancy ratio 10% ~ 30%; The Surface Texture parameter in Pei Mo district, piston skirt 8 is: cavity diameter 30 μm ~ 100 μm, the cavity degree of depth 4 μm ~ 6 μm, area ratio/occupancy ratio 10% ~ 20%.Wherein cavity diameter is the least square diameter of cavity pattern, and the cavity degree of depth is cavity pattern deepest point distance cylinder holes surface distance, and area ratio/occupancy ratio is the percentage that in texture area, nick cavity area accounts for this region gross area.Finished surface texture is implemented by laser, adopt the Nd:YAG continuous solid body laser instrument of diode pumping, pumping current 16 ~ 19A, pulse frequency 1400 ~ 1800Hz, umber of pulse 1 ~ 7 time, assist gas is nitrogen, and air pressure is 0.05 ~ 1.00MPa, wherein pulse frequency is the laser pulse number that laser instrument sends each second, the laser pulse sum of umber of pulse needed for the single cavity of processing.
Cylinder holes 1 surface spikes is removed in post processing, makes surperficial Rpk value be less than 0.1 μm.Post processing adopts glossing, and the parameter of above-mentioned glossing is: the first stage is, bonding agent is resin, material green silicon carbide doped diamond, soft emery stick in granularity 320#, honing pressure 1.0MPa, speed of mainshaft 150rpm, vertical speed 15m/min, honing time 10s; Second stage is, bonding agent is resin, and material is green silicon carbide, the ultra-soft emery stick of granularity 320#, honing pressure 1.0MPa, speed of mainshaft 150rpm, vertical speed 15m/min, honing time 25s.
Processing qualified condition is, cylinder holes 1 surface actual measurement parameter and design load deviation are all less than 10%.
Claims (5)
1. a cylinder holes processing method, is characterized in that, comprises the following steps:
A) pre-treatment, adopts mechanical honing to obtain texture front surface;
B) Surface Texture, Surface Texture is carried out in cylinder holes (1), the target area of Surface Texture is top dead centre district (7) and Pei Mo district, piston skirt (8), top dead centre district (7) covers the top dead centre of cylinder holes (1), and Pei Mo district, piston skirt (8) covers cylinder holes (1) and contact area in piston relative motion; Surface Texture parameter cavity diameter, the cavity degree of depth in top dead centre district (7) and Pei Mo district, piston skirt (8) are different with area ratio/occupancy ratio, the Surface Texture parameter in top dead centre district (7) is: cavity diameter 30 μm ~ 100 μm, the cavity degree of depth 5 μm ~ 8 μm, area ratio/occupancy ratio 10% ~ 30%; The Surface Texture parameter in Pei Mo district, piston skirt (8) is: cavity diameter 30 μm ~ 100 μm, the cavity degree of depth 4 μm ~ 6 μm, area ratio/occupancy ratio 10% ~ 20%;
C) post processing, removes cylinder holes (1) surface spikes, makes surperficial brief peak height Rpk value be less than 0.1 μm.
2. a kind of cylinder holes processing method according to claim 1, it is characterized in that, described steps A) in, pretreatment procedure treatment surface requires: Rpk≤0.1 μm, Rk≤0.15 μm, Rvk≤0.3 μm, Mr1≤6%, Mr2 >=85%, wherein Rk is core roughness depth, Rpk is brief peak height, and Rvk is that brief paddy is dark, and Mr1, Mr2 are profile bearing length ratio.
3. a kind of cylinder holes processing method according to claim 1, it is characterized in that, described step B) in, top dead centre district (7) and Pei Mo district, piston skirt (8) meet following relation, the distance on top dead centre district (7) to cylinder holes (1) top is L2(2), this region height is L3(3); Pei Mo district, piston skirt (8) is positioned at below, top dead centre district (7), and be connected with top dead centre district (7), it is highly L4(4), width is L5(5); Pei Mo district, piston skirt (8) covers cylinder holes (1) and the region contacted in piston relative motion; L2(2) be cylinder holes height overall L6(6) 7 ~ 15%, L3(3) be 17 ~ 25%, L4(4) be 40 ~ 55%, L5(5) be 20% ~ 40% of cylinder holes girth; Pei Mo district, piston skirt (8) is two, and Pei Mo district, two piston skirts (8) relatively cylinder holes axisymmetrical are arranged.
4. a kind of cylinder holes processing method according to claim 1 or 3, it is characterized in that, described step B) in, implement finished surface texture by laser, adopt the Nd:YAG continuous solid body laser instrument of diode pumping, pumping current 16 ~ 19A, pulse frequency 1400 ~ 1800Hz, umber of pulse 1 ~ 7 time, assist gas is nitrogen, air pressure is 0.05 ~ 1.00MPa, and wherein pulse frequency is the laser pulse number that laser instrument sends each second, the laser pulse sum of umber of pulse needed for the single cavity of processing.
5. a kind of cylinder holes processing method according to claim 4, it is characterized in that, step C) middle post processing employing finishing method, burnishing parameters is: the first stage is, bonding agent is resin, material green silicon carbide doped diamond, soft emery stick in granularity 320#, honing pressure 1.0MPa, speed of mainshaft 150rpm, vertical speed 15m/min, honing time 10s; Second stage is, bonding agent is resin, and material is green silicon carbide, the ultra-soft emery stick of granularity 320#, honing pressure 1.0MPa, speed of mainshaft 150rpm, vertical speed 15m/min, honing time 25s.
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| CN201310266008.8A CN103341730B (en) | 2013-06-28 | 2013-06-28 | A kind of cylinder holes processing method |
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| CN103341730B true CN103341730B (en) | 2015-11-18 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104992999B (en) * | 2015-06-02 | 2017-06-16 | 温岭市旭升光电科技有限公司 | One kind embossing photovoltaic welding belt processing method |
| CN105221283B (en) * | 2015-09-22 | 2017-12-05 | 江苏大学 | A kind of engine cylinder hole and its processing method |
| CN105215554A (en) * | 2015-10-29 | 2016-01-06 | 无锡桥阳机械制造有限公司 | A kind of laser honing technique |
| JP6533858B1 (en) * | 2018-07-26 | 2019-06-19 | Ｔｐｒ株式会社 | Cast iron cylinder liner and internal combustion engine |
| CN111151883A (en) * | 2020-01-03 | 2020-05-15 | 大连海事大学 | Cylinder sleeve and piston ring assembly and design method of surface texture thereof |
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| JPH11262822A (en) * | 1998-03-19 | 1999-09-28 | Nissan Motor Co Ltd | Working method for internal surface of cylinder bore and device therefor |
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| EP2157304A1 (en) * | 2008-08-18 | 2010-02-24 | Wärtsilä Schweiz AG | Method of machining for producing a bearing surface on a cylinder wall of a cylinder liner of an internal combustion engine |
| CN102069351A (en) * | 2010-12-20 | 2011-05-25 | 昆明理工大学 | Manufacturing process of composite cylinder sleeve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8338736B2 (en) * | 2008-08-21 | 2012-12-25 | General Electric Company | Extraction of chordal test specimens from forgings |
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| JPH11262822A (en) * | 1998-03-19 | 1999-09-28 | Nissan Motor Co Ltd | Working method for internal surface of cylinder bore and device therefor |
| CN1572414A (en) * | 2003-06-11 | 2005-02-02 | 安德列亚斯·斯蒂尔两合公司 | Method for making a cylinder for a two-stroke engine |
| EP2157304A1 (en) * | 2008-08-18 | 2010-02-24 | Wärtsilä Schweiz AG | Method of machining for producing a bearing surface on a cylinder wall of a cylinder liner of an internal combustion engine |
| CN102069351A (en) * | 2010-12-20 | 2011-05-25 | 昆明理工大学 | Manufacturing process of composite cylinder sleeve |
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| 平台珩磨表面质量的评定方法;高敏等;《工具技术》;20070820;第41卷(第08期);112-113页 * |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20131009 Assignee: Yangzhou Wutingqiao Cylinder Casing Co., Ltd. Assignor: Jiangsu University Contract record no.: 2015320000619 Denomination of invention: Cylinder bore machining method License type: Common License Record date: 20151023 |
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Application publication date: 20131009 Assignee: Zhenjiang Guangrun Electromechanical Technology Co. Ltd. Assignor: Jiangsu University Contract record no.: 2016320000139 Denomination of invention: Cylinder bore machining method Granted publication date: 20151118 License type: Common License Record date: 20160421 Application publication date: 20131009 Assignee: Beijing Laize Photonics Co., Ltd. Assignor: Jiangsu University Contract record no.: 2016320000137 Denomination of invention: Cylinder bore machining method Granted publication date: 20151118 License type: Common License Record date: 20160421 |
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