CN105221283B - A kind of engine cylinder hole and its processing method - Google Patents
A kind of engine cylinder hole and its processing method Download PDFInfo
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- CN105221283B CN105221283B CN201510611662.7A CN201510611662A CN105221283B CN 105221283 B CN105221283 B CN 105221283B CN 201510611662 A CN201510611662 A CN 201510611662A CN 105221283 B CN105221283 B CN 105221283B
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Abstract
The invention provides a kind of engine cylinder hole and its processing method, the cylinder holes surface distributed has cavity array；The size of the cavity is micro-meter scale；Skew, deviation angle α ∈ [30,90] °, distribution density ρ ∈ [5,20] % of the cavity (10) be present in the initial position do not gone together in the cavity；The cavity axially circumferentially has different spacing respectively in the cylinder holes with the cylinder holes, keep circumferential spacing M constant, increase axial N spacing, highdensity nick chamber pattern processing is carried out in high-speed region, the nick chamber pattern processing of low-density is carried out in low-speed region；By changing the density of the cavity, the cavity number is reduced, minute surface cylinder holes is obtained by mechanical Honing process, obtained by laser in cylinder holes Surface Machining has the special rule, size of being uniformly distributed in micron-sized circular-shaped, concave cavity array immediately；Cavity, with minimum lubrication oil consumption, forms continuous lubricating oil film in cylinder holes piston ring relative movement, and plays fine motion pressure lubricating effect.
Description
Technical field
The invention belongs to field of internal combustion engine, and in particular to a kind of engine cylinder hole and its processing method.
Background technology
Cylinder holes-Piston Ring is one of typical friction pair in engine, determine engine performance and
Life-span, and the texture structure on cylinder holes surface and engine emission performance are closely bound up.In the past, engine cylinder hole machined was generally adopted
With mechanical honing technique, by reducing cylinder holes roughness, crossover-platform reticulate pattern is formed, is improved between cylinder holes-Piston Ring
Lubrication state.In recent years, with the progress of the special process, particularly superlaser process technology, there is cylinder holes laser texturing
Technology.It has energy-saving and emission-reduction, highly-efficient processing, without cutter loss and advantages of environment protection, obtains industrial circle concern.
CN200510116292 discloses a kind of laser honing work that processing micro groove structure in friction load face is born in workpiece
Tool.The patent does not propose the surface requirements of cylinder holes before processing, and is in fact very crucial, and the patent laser machining site
Selection do not consider the abrasion distribution on cylinder holes surface, specific aim deficiency.In addition, the micro groove structure size mistake in the patent
Greatly, fine motion pressure lubricating effect can not be formed.
Different from the laser honing technique referred in above-mentioned laser, cylinder holes laser texturing technology is big in cylinder holes Surface Machining
The circular nick chamber array of metric density, distribution and depth all controllable precises.CN201310266008 discloses a kind of cylinder holes processing
Method, this method include pre-treatment, Surface Texture, post processing and detection.The patent carries out subregional laser on cylinder holes surface
Micro- texture processing, however, its subregional setting is not combined between engine actual condition, and cylinder holes-piston ring
Relative motion.Therefore in this method, nick hole is all to be uniformly distributed in the axial and circumferential of cylinder holes.
Engine cylinder hole has outstanding feature with Piston Ring：On the one hand, it has eccentric wear phenomenon, cylinder holes difference
The wear condition in region differs, and easily occurs to wear in top dead centre region and with the region of Contact of Piston Skirt and influences
The performance of engine and life-span.Furthermore it has shifting characteristics, in different travel positions, cylinder holes surface has not with piston ring
Same relative velocity and acceleration, thus stressing conditions are also not quite similar.Finally, it also has thermo parameters method inhomogeneities,
In combustion chamber and near top dead center, temperature is higher.
The content of the invention
The invention aims to solve deficiency of the prior art, and provide a kind of engine cylinder hole and its processing side
Method, solve in engine cylinder hole dimple chamber array antifriction technology, processing efficiency is low, is easy to occur due under surface support rate
Caused by drop the problem of abrasion, discharge performance difference.
The technical scheme is that：A kind of engine cylinder hole, the cylinder holes surface distributed have cavity array；The cavity
Size be micro-meter scale；The regional roughness Ra values of the non-cavity in cylinder holes surface are less than or equal to 0.2 μm；
There is skew in the cavity, the cavity is in the line of the initial position of all rows in the initial position do not gone together
The initial position line；It is deviation angle α that the initial position line and cylinder holes, which circumferentially intersect angulation, the deviation angle
α∈[30,90]°。
In such scheme, the profile of the cavity is circular, the diameter R ∈ [10,300] μm of the cavity, the cavity
Depth H ∈ [2,20] μm.
In such scheme, distribution density ρ ∈ [5, the 20] % of the cavity in the cylinder holes；Distribution density ρ=the π ×
[cavity diameter R]2/ [4 × sin deviation angles α × axial spacing N × circumferential spacing M] × 100%.
In such scheme, the cylinder holes surface is divided into non-processing region, region A, region B and region C；
The non-processing region is the cylinder holes and piston ring relief area in engine operation process；
The region A is top dead centre line close region, the length L of the region AAFor the cylinder holes overall length LAlways5%-
15%；
The region B is piston primary and secondary thrust face and the cylinder holes surface area contact；
The region C removes the region of the region B between lower dead center line and the region A；
Distribution density of the cavity in the region A, the region B and the region C is respectively ρA、ρB、ρC, greatly
Float is classified as：ρA≥ρB≥ρC。
Further, distribution density of the cavity in the region A, the region B and the region C is respectively：
15%≤ρA≤ 20%, 10%≤ρB≤ 15%, 5%≤ρC≤ 10%.
Further, the axial spacing N of the cavity is axially incremented by along the cylinder holes, and the cavity is in the region A, institute
It is 3%-10% that the distribution density in region B or described region C, which is stated, from the top in each region to bottom difference.
A kind of processing method of the engine cylinder hole, comprises the following steps：
S1：Pre-treatment, preceding surface is processed using the smooth texture of mechanical honing；
S2：Surface Texture, using focusing laser beam in cavity array described in the cylinder holes Surface Machining；
S3：Post processing, using surface after mechanical polishing cleaning texture processing.
In such scheme, mechanical honing concrete technology is in the step S1：Surplus is gone using diamond hone stone first,
Then preceding surface is processed using the smooth texture of spline；The texture process the surface parameter scope on preceding surface for Rpk≤
0.2 μm, Rk≤0.4 μm, Rvk≤1.0 μm.
In such scheme, in the step S2, the single pulse energy for focusing on laser beam is 0.5-2.5mJ；
The focusing laser beam is processed from the cylinder holes top toward bottom, in the region A, the region B or described areas
Domain C initial time, digital control system record axial direction and the circumferential position that first laser pulse acts on the cylinder holes surface；
After cavity described in a line being machined with equal circumferential spacing M, the digital control system control focusing laser beam effect
In the first impulse action position of next line, its axial location is that the first impulse action axial location of lastrow adds two in the ranks
Axial spacing N, its circumferential position add offset for the circumferential position of the first pulse laser impulse action of lastrow, subsequent rows
The processing logic of the cavity array is identical；The offset is axial spacing N × [tan deviation angles of the row and lastrow
α]。
In such scheme, the concrete technology post-processed in the step S3 is：Surplus is gone using diamond hone stone first,
Then using surface after the smooth texture processing of spline；Surface Rpk≤0.3 μm after the texture processing.
The present invention has the advantages that compared with prior art：
1st, abrasion and speed characteristics of the present invention according to cylinder holes-Piston Ring, with reference to the cavity in the cylinder holes
The change of the axial and described circumferentially distributed density of cylinder holes, realize with the processing of the minimum cavity pattern, in cylinder holes surface shape
Into continuous lubricating oil film and fine motion pressure lubricating effect.
2nd, the present invention circumferentially has different spacing respectively by the cavity in the axial and described cylinder holes of the cylinder holes, i.e.,
Keep circumferential spacing M constant, increase axial N spacing, so as to change the cavity density on the cylinder holes surface, reduce the cavity shape
The processing of looks.
3rd, the present invention also passes through distribution density of the cavity in cylinder holes axial direction and the relative motion of cylinder holes-piston ring
Velocity correlation, the highdensity cavity pattern processing is carried out in high-speed region, the described recessed of low-density is carried out in low-speed region
Chamber pattern is processed so that in ρA≥ρB≥ρC。
4th, the present invention obtains minute surface cylinder holes by mechanical Honing process, is had immediately by laser in cylinder holes Surface Machining
There is the special rule, size of being uniformly distributed in micron-sized circular-shaped, concave cavity array；The cavity is in cylinder holes-piston ring relative motion
During, with minimum lubrication oil consumption, continuous lubricating oil film is formed, and play fine motion pressure lubricating effect.
5th, the processing capacity of the invention by reducing the cavity pattern, improves production efficiency, reduces power consumption of polymer processing.
6th, the hollow body volume that the present invention is formed by reducing the cavity on cylinder holes surface, and then reduce the machine on cylinder holes surface
Oil evaporation, for engine complete machine, fuel oil consumption reduces by 4~5% or so, and engine oil consumption reduces by 30~50% or so, finally carries
Rise discharge performance.
7th, the present invention is substantially increased its surface support rate, reduces cylinder holes table by the reduction of cylinder holes surface hollow body volume
Face and the pressure in piston ring contact face, so as to reduce abrasion.
Although the 8, the cavity number is reduced in the present invention, their effects to the cylinder holes surface lubrication, antifriction
It is not obviously reduced.
Brief description of the drawings
Fig. 1 is cylinder holes schematic diagram in one embodiment of the invention.
Fig. 2 is that cylinder holes cutting flattens schematic diagram in one embodiment of the invention.
Fig. 3 is local cavity array schematic diagram in one embodiment of the invention.
In figure, 1, cylinder holes；2nd, cylinder holes axial direction；3rd, cylinder holes is circumferential；4th, non-processing region；5th, top dead centre line；6th, lower dead center line；
7th, region A；8th, region B；9th, region C；10th, cavity；11st, initial position line.
Embodiment
Embodiment is described in further detail to the present invention below in conjunction with the accompanying drawings, but protection scope of the present invention is simultaneously
Not limited to this.
Fig. 1 show the schematic diagram of cylinder holes 1 in the embodiment of the present invention, a kind of engine cylinder hole, and the surface distributed of cylinder holes 1 has
The array of cavity 10, the size of the array of cavity 10 is micro-meter scale, the regional roughness Ra of the non-cavity 10 in the surface of cylinder holes 1
Value is less than or equal to 0.2 μm.The surface of cylinder holes 1 of the present invention is more smooth so that in engine operation process, in piston ring
Oil ring scraping effect improves, while reduces complete machine engine oil consumption rising caused by the surface machine oil evaporation of cylinder holes 1.
Fig. 2 show the cutting of cylinder holes 1 in the embodiment of the present invention and flattens schematic diagram, and the circumferencial direction for defining the cylinder holes 1 is
Cylinder holes circumferential 3；The central axial direction of the cylinder holes 1 is cylinder holes axial direction 2.So, the array of cavity 10 is in cylinder holes week
Spacing to 3 is circumferential spacing M, and the spacing in cylinder holes axial direction 2 is axial spacing N.
Fig. 3 show local cavity array schematic diagram in the embodiment of the present invention, and the cylinder holes circumferential 3 is simultaneously and described recessed
The line direction of the array of chamber 10；Skew, the line of the initial position of all rows be present in the initial position do not gone together in the cavity 10
For initial position line 11, the initial position line 11 and circumferential 3 angulations of the cylinder holes are deviation angle α, the deviation angle
Spend α ∈ [30,90] °.
In the present embodiment, the profile of shown cavity 10 is preferably round, its diameter ∈ [10,300] μm, depth ∈
[2,20] μm, deviation angle α ∈ [45,90] °.
And then define distribution density ρ=π × [the cavity diameter] of the cavity 10 of a certain position in the surface of cylinder holes 12/[4×
Sin deviation angles α × axial spacing N × circumferential spacing M] × 100%；The cavity 10 of the surface optional position of cylinder holes 1
Distribution density ρ ∈ [5,20] %, the cavity 10 is in distribution density ρ and the region in the surface region of cylinder holes 1 in institute
The position for stating cylinder holes circumferential 3 and cylinder holes axial direction 2 is relevant.
Shown in Fig. 2, the overall length L of cylinder holes 1AlwaysFor 150mm, a diameter of 73mm of the cylinder holes 1.The surface of cylinder holes 1 point
For non-processing region 4, region A7, region B8 and region C9.Wherein, the non-processing region 4 is institute in engine operation process
State cylinder holes 1 and piston ring relief area, the length L in the non-processing region 4It is non-；The region A7 is that top dead centre line 5 closes on area
Domain, the length L of the region A7AFor the overall length L of cylinder holes 1Always5%-15%；The region B8 is piston primary and secondary thrust face
With the surface area contact of cylinder holes 1, the length of the region B8 is LB, width WB；The region C9 be lower dead center line 6 with it is described
The region of the region B8 is removed between the A7 of region, the length of the region C9 is LC, width WC。
Distribution density of the cavity 10 in the region A7, the region B8 and the region C9 is respectively ρA、ρB、
ρC, the ρA, the ρBWith the ρCBig minispread has the following regularity of distribution：ρA≥ρB≥ρC, and the axial spacing N edges
The cylinder holes axial direction 2 is incremented by so that distribution of the cavity 10 in the region A7, the region B8 or described region C9 is close
Degree is 3%-10% from the top in each region to bottom difference；The distribution density maximum of cavity 10 described in each region, it is each region
The distribution density of the cavity 10.In the present embodiment, the cavity 10 is in the region A7, the region B8 and the region
Distribution density in C9 is preferably：15%≤ρA≤ 20%, 10%≤ρB≤ 15%, 5%≤ρC≤ 10%.
A kind of method of the engine cylinder hole is divided into following three steps：
S1：Preceding surface is processed using the smooth texture of mechanical honing, concrete technology goes remaining for first using diamond hone stone
Amount, preceding surface is then processed using the smooth texture of spline；The surface parameter scope that the texture processes preceding surface is Rpk
≤ 0.2 μm, Rk≤0.4 μm, Rvk≤1.0 μm.
S2：It is in the array of cavity 10, concrete technology described in the Surface Machining of cylinder holes 1 using laser beam is focused on, it is described poly-
The single pulse energy of burnt laser beam is 0.5-2.5mJ；
The focusing laser beam is processed from the top of cylinder holes 1 toward bottom, in region B8 or described described in the region A7
Region C9 initial time, digital control system record axial direction and the circumferential position that first laser pulse acts on the surface of cylinder holes 1；
After machining cavity 10 described in a line with equal circumferential spacing M, the digital control system control focusing laser beam is made
Used in the first impulse action position of next line, its axial location is that the first impulse action axial location of lastrow adds two in the ranks
Axial spacing N, its circumferential position adds offset, subsequent rows for the circumferential position of the first pulse laser impulse action of lastrow
The cavity 10 processing logic it is identical, the offset is axial spacing N × tan (deviation angles of the row and lastrow
α)。
S3：Using surface after mechanical polishing cleaning texture processing, concrete technology is gone remaining for first using diamond hone stone
Amount, then using surface after the smooth texture processing of spline so that surface Rpk≤0.3 μm after the texture processing.
Abrasion and speed characteristics of the present invention according to cylinder holes-Piston Ring, with reference to the cavity 1 in the cylinder holes axle
To the change of circumferential 3 distribution in 2 and the cylinder holes, the pattern processing with the minimum cavity 1 is realized, on the surface of cylinder holes 1
Form continuous lubricating oil film and fine motion pressure lubricating effect.Compared with prior art, the present invention reduces the pattern processing of the cavity 1
Method is：Change the pattern density of the cavity 1 on the surface of cylinder holes 1, be divided into two kinds of approach：First, the shape of the cavity 1
Looks have different spacing respectively in the axial direction 2 and the circumference 3, that is, keep circumferential spacing M constant, increase axial spacing N；
Second, distribution density of the pattern of the cavity 1 in cylinder holes axial direction 2 associates with the speed of related movement of cylinder holes-piston ring,
The pattern processing of the highdensity cavity 1 is carried out in high-speed region, the shape of the cavity 1 of low-density is carried out in low-speed region
Looks are processed.
The embodiment is preferred embodiment of the invention, but the present invention is not limited to above-mentioned embodiment, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification belongs to protection scope of the present invention.
Claims (8)
1. a kind of engine cylinder hole, it is characterised in that cylinder holes (1) surface distributed has cavity (10) array；The cavity
(10) size is micro-meter scale；The regional roughness Ra values of the non-cavity in cylinder holes (1) surface (10) are less than or equal to 0.2 μ
m；
Skew, the company of initial position of the cavity (10) in all rows be present in the initial position do not gone together in the cavity (10)
Line is initial position line (11)；It is deviation angle α that the initial position line (11) intersects angulation with cylinder holes circumferential (3),
The deviation angle α ∈ [30,90] °；
Distribution density ρ ∈ [5,20] % of the cavity (10) in the cylinder holes (1)；Distribution density ρ=the π × [cavity is straight
Footpath R]2/ [4 × sin deviation angles α × axial spacing N × circumferential spacing M] × 100%；
Cylinder holes (1) surface is divided into non-processing region (4), region A (7), region B (8) and region C (9)；
The non-processing region (4) is the cylinder holes (1) and piston ring relief area in engine operation process；
The region A (7) is top dead centre line (5) close region, the length L of the region A (7)AFor the cylinder holes (1) overall length LAlways
5%-15%；
The region B (8) is piston primary and secondary thrust face and the cylinder holes (1) surface area contact；
The region C (9) removes the region of the region B (8) between lower dead center line (6) and the region A (7)；
Distribution density of the cavity (10) in the region A (7), the region B (8) and the region C (9) is respectively ρA、
ρB、ρC, size is arranged as：ρA≥ρB≥ρC。
2. engine cylinder hole according to claim 1, it is characterised in that the profile of the cavity (10) is circle, described
The diameter R ∈ [10,300] μm of cavity (10), the depth H ∈ [2,20] μm of the cavity (10).
3. engine cylinder hole according to claim 1, it is characterised in that the cavity (10) is in the region A
(7), the distribution density in the region B (8) and the region C (9) is respectively：15%≤ρA≤ 20%, 10%≤ρB≤
15%, 5%≤ρC≤ 10%.
4. engine cylinder hole according to claim 1, it is characterised in that the axial spacing N of the cavity (10) is along cylinder holes
Axially (2) are incremented by, distribution density of the cavity (10) in the region A (7), the region B (8) or described region C (9)
It is 3%-10% from the top in each region to bottom difference.
5. the processing method of engine cylinder hole described in a kind of claim 1, it is characterised in that comprise the following steps：
S1：Pre-treatment, preceding surface is processed using the smooth texture of mechanical honing；
S2：Surface Texture, using focusing laser beam in cavity (10) array described in the cylinder holes (1) Surface Machining；
S3：Post processing, using surface after mechanical polishing cleaning texture processing.
6. processing method according to claim 5, it is characterised in that mechanical honing concrete technology is in the step S1：
Surplus is gone using diamond hone stone first, preceding surface is then processed using the smooth texture of spline；The texture processing
The surface parameter scope on preceding surface is Rpk≤0.2 μm, Rk≤0.4 μm, Rvk≤1.0 μm.
7. processing method according to claim 5, it is characterised in that in the step S2, the list for focusing on laser beam
Pulse energy is 0.5-2.5mJ；
The focusing laser beam is processed from the cylinder holes (1) top toward bottom, in the region A (7), the region B (8) or institute
The initial time of region C (9) is stated, digital control system records axial direction and the week that first laser pulse acts on the cylinder holes (1) surface
To position；
After cavity described in a line (10) being machined with equal circumferential spacing M, the digital control system control focusing laser beam effect
In the first impulse action position of next line, its axial location is that the first impulse action axial location of lastrow adds two in the ranks
Axial spacing N, its circumferential position add offset for the circumferential position of the first pulse laser impulse action of lastrow, subsequent rows
The processing logic of cavity (10) array is identical；The offset is axial spacing N × [tan skews of the row and lastrow
Angle [alpha]].
8. processing method according to claim 5, it is characterised in that the concrete technology post-processed in the step S3 is：
Surplus is gone using diamond hone stone first, then using surface after the smooth texture processing of spline；The texture processing
Surface Rpk≤0.3 μm afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510611662.7A CN105221283B (en) | 2015-09-22 | 2015-09-22 | A kind of engine cylinder hole and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510611662.7A CN105221283B (en) | 2015-09-22 | 2015-09-22 | A kind of engine cylinder hole and its processing method |
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| Publication Number | Publication Date |
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| CN105221283A CN105221283A (en) | 2016-01-06 |
| CN105221283B true CN105221283B (en) | 2017-12-05 |
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ID=54990488
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| CN201510611662.7A Expired - Fee Related CN105221283B (en) | 2015-09-22 | 2015-09-22 | A kind of engine cylinder hole and its processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016105717B4 (en) * | 2016-03-29 | 2024-05-16 | Gehring Technologies Gmbh + Co. Kg | Process for producing rotationally symmetrical, non-cylindrical bores with a honing tool |
| CN114251184A (en) * | 2017-03-22 | 2022-03-29 | 阿凯提兹动力公司 | Cylinder bore surface structure for opposed-piston engines |
| CN107175581A (en) * | 2017-07-21 | 2017-09-19 | 上汽通用五菱汽车股份有限公司 | The honing method and grinding equipment of engine cylinder hole |
| CN107642429A (en) * | 2017-10-13 | 2018-01-30 | 潍柴动力股份有限公司 | Without cylinder sleeve cylinder body and engine |
| CN109773225A (en) * | 2018-12-27 | 2019-05-21 | 哈尔滨理工大学 | A kind of non-equidistant texture finishing anti-attrition turning insert |
| CN111421306A (en) * | 2020-04-23 | 2020-07-17 | 河南省中原华工激光工程有限公司 | Method for processing high-power diesel engine precision texture cylinder sleeve |
| CN112228236B (en) * | 2020-10-20 | 2021-11-05 | 江苏大学 | Internal combustion engine cylinder sleeve and machining method thereof |
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| CN2381844Y (en) * | 1999-06-10 | 2000-06-07 | 杭州电子工业学院 | Cylinder sleeve with oil storing honeycomb |
| EP1762721A2 (en) * | 2005-09-08 | 2007-03-14 | Deere & Company | Internal combustion engine |
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| CN105221283A (en) | 2016-01-06 |
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