CN1197684C - Nitrogenation platform checkered cylinder jacket processing method - Google Patents
Nitrogenation platform checkered cylinder jacket processing method Download PDFInfo
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- CN1197684C CN1197684C CN 02138260 CN02138260A CN1197684C CN 1197684 C CN1197684 C CN 1197684C CN 02138260 CN02138260 CN 02138260 CN 02138260 A CN02138260 A CN 02138260A CN 1197684 C CN1197684 C CN 1197684C
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- platform
- cylinder jacket
- groove
- reticulate pattern
- cylinder sleeve
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention relates to a processing technology of a cylinder sleeve of an engine. The wall of an inner hole of a nitrogenation platform reticulate pattern cylinder sleeve is provided with a nitrogen rigidification composite layer which comprises a loosening layer, a compact layer and a diffusion layer. A reticulate pattern platform and a channel are arranged on the loosening layer and the compact layer. A micro channel is arranged on the platform. The channels are mutually communicated and are crossed to be regularly arranged in a net shape. A separation angle alpha of the direction of platform reticulate patterns and the direction of a central line of the cylinder sleeve is 100 DEG to 150 DEG. With a measuring length of 4mm, at least 5 channels of which the depth is not less than 3 mu m of the platform reticulate patterns are arranged. The nitridation platform reticulate patterns are processed by the relative grinding motion of a mechanical honing abrasive tool for the slow rotation of the inner hole of the cylinder sleeve. The relative rotation speed of the cylinder sleeve and the abrasive tool is 15 to 50 meters/minute. The reciprocating motion speed corresponding to the axial direction is 4 to 30 meters/minutes. The abrasive tool is composed of elastic soft wood or rubber, resinoid bond and abrasive grains which are prepared according to a certain compounding ratio, and the stock removal is 0.002 to 0.02mm. The abrasive tool has elasticity and can lead the abrasive grains to enter the bottoms of the micro channels and the channels for fine grinding.
Description
Technical field
A kind of nitrogenation platform checkered cylinder jacket processing method belongs to mechanical engineering technical field, relates in particular to the air cylinder sleeve of engine process technology.
Background technology
Domestic existing cylinder jacket, has reticulate structure through machining, after nitrogenize heat treatment, the hardness and the resistance to corrosion of cylinder jacket inner bore surface weaker zone increase, but though also oil-containing of weaker zone, help lubricating, but covering fully, the nitration case of cylinder jacket inner bore surface blocked original reticulate pattern groove, and make the weaker zone surface be the ridges and peaks shape, thoroughly destroyed the advantage on the original platform reticulate pattern of cylinder cover inner hole surface, the initial running-in effect of cylinder jacket and piston, piston ring and pump oil ability are all descended to some extent.Common mechanical honing method processing cylinder cover inner hole can be removed the surface porosity layer after the nitrogenize fully or not have groove, at the bearing length rate T of 1 μ m
p＜5%, make cylinder jacket oil-containing poor effect, thereby the matching property of engine piston ring and cylinder sleeve can be descended, prolong running-in period, and cylinder sleeve top dead centre lubricant effect descends, and makes the consumption of lubricating oil height, CO and CH pernicious gas and particulate emission increase in the motor exhaust, are unfavorable for environmental protection.
Technical scheme
The purpose of this invention is to provide a kind of nitrogenize checkered cylinder jacket processing method, make cylinder jacket inner bore surface after via nitride heat treatment, process platform reticulate pattern, improve lubricant effect and cylinder jacket service life by honing.
Cylinder cover inner hole of the present invention is the platform reticulate pattern surface before nitrogenize, after being characterized in via nitride, high speed rotation elastic grindstone by mechanical honing to cylinder cover inner hole at a slow speed the relative grinding motion of rotation form nitrogenation platform checkered, the relative rotational of cylinder jacket and grinding tool is 15～50 meters/minute, reciprocating motion speed to axial is 4～30 meters/minute, on the cylinder cover inner hole wall of above-mentioned processing, form the nitrogen hardening composite bed, composite bed comprises weaker zone, compacted zone and diffusion layer, weaker zone and compacted zone are provided with reticulate pattern platform and groove, on platform, be provided with little groove, each groove connects mutually, it is netted regularly arranged to be intersection, platform reticulate pattern and cylinder jacket centerline direction angle α are 100 °～150 °, and in 4mm measured length, the groove number of the gash depth of platform reticulate pattern 〉=3 μ m had 5 at least.
This nitrogenation platform checkered cylinder jacket bore area that the present invention processes is rational in infrastructure, is convenient to lubricating oil and flows and ooze along groove and ooze the formation high-strength oil film, makes between cylinder jacket and piston, piston ring greasy property good, and the reduction oil consumption reaches more than 50%.High-intensity compacted zone and diffusion layer have improved the wear-resistant grain wearing and tearing and the resistance to corrosion of cylinder jacket, the bearing length rate T during its 1 μ m horizontal intercept
p〉=20%, cylinder jacket is used reached more than 900,000 kilometers, increase the service life more than 60%.The raising of netted groove and 1 μ m bearing length rate has increased sealing effectiveness, thereby reaches the purpose that prolongs cylinder jacket service life, improves engine power.
Mechanical honing processing method of the present invention is that elastic grindstone is made of according to a certain ratio rubber-like cork or rubber, resinoid bond and abrasive particle, and its stock removal is 0.002～0.02mm.
Nitrogenize front air cylinder cover inner surface is the platform reticulate pattern surface, with the rubber-like grinding tool interior surface of cylinder liner is carried out meticulous honing after the nitrogenize, rotation of the high speed of grinding tool and cylinder jacket rotation at a slow speed match and carry out meticulous honing and process, and making nitrogenation platform checkered weaker zone case depth is that 0.002～0.025mm, hardness are Vickers H
V25=130～390 surperficial ridges and peaks shape is ground to platform-like by grinding tool, because the grinding tool of this structure has elasticity, can make abrasive particle go deep into little groove and channel bottom carries out fine grinding.Because cylinder jacket platform webbing reaches the layering sclerosis, cylinder cover inner hole platform net grain surface fineness and oil storage effect have been improved, help forming high-strength oil film, make piston, piston ring, cylinder jacket more be tending towards reasonable aspect the friction pair lubricating, join, can reduce consumption of lubricating oil more than 50%, increase the service life, and particulate emission is descended more than 15%, help environmental protection.
Description of drawings
Fig. 1 is a cylinder jacket inner bore surface enlarged diagram of the present invention
Fig. 2 is a cylinder jacket inner bore surface amplification view of the present invention
Fig. 3 is a grinding tool grinding tool material structure schematic diagram of the present invention
Specific embodiment
Nitrogenation platform checkered cylinder jacket endoporus of the present invention is by metallic matrix 7, weaker zone 4, compacted zone 5 and diffusion layer 6 are formed composite bed, at weaker zone 4, compacted zone 5 is provided with platform 1, little groove 2 and groove 3, connect mutually between little groove 2, connect mutually between the groove 3, each groove connects mutually, be combined into cross network structure reticulate pattern, platform 1, little groove 2 and groove 3 are 100 °～150 ° with cylinder jacket centerline direction angle α, it is netted regularly arranged to be intersection, in 4mm measures length, the groove number of groove 3 degree of depth of platform reticulate pattern 〉=3 μ m has 5 at least, bearing length rate Tp 〉=20% of its 1 μ m.The degree of depth of weaker zone 4 is 0.002～0.025mm, and hardness is Vickers H
V25=130～390.Because the grinding tool 8 material selection graininess corks or the rubber 9 of honing processing, high rigidity abrasive particle 10 and resinoid bond 11, and form according to a certain ratio, so grinding tool 8 has elasticity when grinding, and platform 1 top, little groove 2 and groove 3 bottoms are all carried out grinding.Weaker zone 4 surfaces after the nitrogenize heat treatment are the ridges and peaks shape, carry out meticulous honing through 8 pairs of cylinder jacket of mechanical honing grinding tool, the relative rotational of cylinder jacket and grinding tool is 15～50 meters/minute, reciprocating motion speed to axial is 4～30 meters/minute, make the surface of 8 pairs of weaker zones 4 of elastic grindstone carry out elasticity extruding grinding, and some cork or rubber 9 and abrasive particle 10 are clamp-oned in little groove 2 and the groove 3, make weaker zone 4 ridges and peaks shapes progressively be ground to platform 1, because the relative platform of hardness 1 place at groove 3 and little groove 2 places is low, groove structure is more loose relatively, so when emery wheel 8 acts on platform 1 surface, the abrasive particle 10 that is squeezed into little groove 2 and groove 3 is also continuing to process grinding to it, thereby recover groove 3, little groove 2 that grinding makes new advances has formed platform reticulate pattern.
Rational in infrastructure with the platform checkered cylinder jacket bore area that the inventive method processes, being convenient to lubricating oil flows and oozes along groove and ooze the formation high-strength oil film, improve greasy property, reducing oil consumption reaches more than 50%, increase sealing effectiveness, can make cylinder jacket reach 900,000 kilometers service life, life-saving is more than 60%.
Claims (2)
1, a kind of nitrogenation platform checkered cylinder jacket processing method, cylinder cover inner hole is the platform reticulate pattern surface before nitrogenize, after it is characterized in that via nitride, high speed rotation elastic grindstone by mechanical honing to cylinder cover inner hole at a slow speed the relative grinding motion of rotation form nitrogenation platform checkered, the relative rotational of cylinder jacket and grinding tool is 15～50 meters/minute, reciprocating motion speed to axial is 4～30 meters/minute, on the cylinder cover inner hole wall of above-mentioned processing, form the nitrogen hardening composite bed, composite bed comprises weaker zone, compacted zone and diffusion layer, weaker zone and compacted zone are provided with reticulate pattern platform and groove, on platform, be provided with little groove, each groove connects mutually, it is netted regularly arranged to be intersection, platform reticulate pattern and cylinder jacket centerline direction angle α are 100 °～150 °, in 4mm measured length, the groove number of the gash depth of platform reticulate pattern 〉=3 μ m had 5 at least.
2, processing method according to claim 1 is characterized in that elastic grindstone is made of according to a certain ratio rubber-like cork or rubber, resinoid bond and abrasive particle, is 0.002～0.02mm to platform checkered cylinder jacket processing stock removal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138260 CN1197684C (en) | 2002-09-09 | 2002-09-09 | Nitrogenation platform checkered cylinder jacket processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138260 CN1197684C (en) | 2002-09-09 | 2002-09-09 | Nitrogenation platform checkered cylinder jacket processing method |
Publications (2)
| Publication Number | Publication Date |
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| CN1411947A CN1411947A (en) | 2003-04-23 |
| CN1197684C true CN1197684C (en) | 2005-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02138260 Expired - Fee Related CN1197684C (en) | 2002-09-09 | 2002-09-09 | Nitrogenation platform checkered cylinder jacket processing method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445429C (en) * | 2004-03-18 | 2008-12-24 | 烟台万斯特有限公司 | Platform method for fabricating cylinder liner with chrome in reticulate pattern being plated |
| CN101380711B (en) * | 2008-09-27 | 2010-06-02 | 吴江市双精轴承有限公司 | Processing method of bead-fixing ring of vortex type automobile air conditioner compressor |
| CN102485421A (en) * | 2010-12-01 | 2012-06-06 | 大连新氏传动科技有限公司 | Reticulated vertical lathe grinding device |
| DE102011079900A1 (en) * | 2011-07-27 | 2013-01-31 | Grob-Werke Gmbh & Co. Kg | Method and processing plant for fine machining a crankshaft bearing bore |
| CN102528399B (en) * | 2012-02-16 | 2014-03-05 | 扬州华铁铁路配件有限公司 | Method for producing austempered ductile iron (ADI) cylinder sleeve |
| CN104511798A (en) * | 2014-12-11 | 2015-04-15 | 贵州红林机械有限公司 | Honing processing method for high-precision copper rotor plunger holes |
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2002
- 2002-09-09 CN CN 02138260 patent/CN1197684C/en not_active Expired - Fee Related
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| CN1411947A (en) | 2003-04-23 |
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