CN108747798B - Differentiated honing cylinder sleeve and preparation method thereof - Google Patents
Differentiated honing cylinder sleeve and preparation method thereof Download PDFInfo
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- CN108747798B CN108747798B CN201810528080.6A CN201810528080A CN108747798B CN 108747798 B CN108747798 B CN 108747798B CN 201810528080 A CN201810528080 A CN 201810528080A CN 108747798 B CN108747798 B CN 108747798B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/10—Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/004—Cylinder liners
Abstract
The invention discloses a differential honing cylinder sleeve and a preparation method thereof, wherein honed reticulate patterns are arranged on the inner hole wall of the cylinder sleeve, the reticulate patterns are distributed in a differential manner from top to bottom, the network patterns comprise oil storage patterns and smooth patterns, the depth of the oil storage patterns is larger than that of the smooth patterns, the position of the oil storage patterns forms a functional oil storage area of the cylinder sleeve, the position of the smooth patterns forms a smooth transition area of the cylinder sleeve, the inner hole wall of the cylinder sleeve is sequentially provided with an area I, an area II and an area III from top to bottom, the reticulate patterns of the area I, the area II and the area III adopt the oil storage patterns or the smooth patterns, and the reticulate patterns of the area I and the area II are different; the invention can improve the sliding performance of the inner hole wall of the cylinder sleeve, so that the oil storage of the inner hole wall of the cylinder sleeve is uniform, the oil consumption is reduced, the friction coefficient and the abrasion loss are reduced, the abrasion resistance between the cylinder sleeve and the piston is effectively improved, and the service life of the cylinder sleeve and the stability and the reliability of the engine work are further improved.
Description
Technical Field
The invention relates to the technical field of cylinder liner inner wall reticulate pattern machining, in particular to a differential honing cylinder liner and a preparation method thereof.
Background
The cylinder sleeve is one of key parts of an engine, is in a cylindrical structure, is arranged in a cylinder block hole of an engine body in operation, is tightly pressed and fixed by a cylinder cover at the upper end, and is provided with a piston which reciprocates in an inner hole of the cylinder sleeve, so that the structure of the inner surface of the cylinder sleeve directly influences the engine oil consumption and the service life of the engine. At present, a reticulate pattern structure is arranged on the inner hole wall of the cylinder sleeve, the reticulate pattern structure is formed by reticulate patterns and a small top platform, the reticulate patterns are convenient for storing lubricating oil, the actual bearing area of the cylinder sleeve is increased, engine oil is also facilitated to be pumped up to a working area on the upper part of the cylinder sleeve, the small top platform is favorable for forming a high-strength oil film, redundant engine oil on the surface of the cylinder sleeve is scraped back to a crankcase, the sliding performance of the surface of a cylinder is improved, the air tightness of the cylinder hole is increased, and meanwhile, the engine oil consumption is greatly reduced, wherein the performance and the service life of the cylinder sleeve are closely related to parameters such as the width, the depth and the uniformity of the reticulate pattern patterns on the inner surface of the cylinder sleeve.
At present, the processing of the reticulate pattern of the inner surface of the cylinder sleeve mainly adopts a honing process, wherein the honing process is mechanical honing, and the reticulate pattern is manufactured by adopting pre-rough honing, semi-fine honing and fine honing. However, the reticulate patterns obtained by honing are mostly uniformly distributed at present, the oil storage is insufficient due to the smoothness of the reticulate patterns, lubricating oil is extruded along grooves due to the fact that the reticulate patterns are too deep, the lubricating effect is reduced, abrasion between a cylinder sleeve and a piston is large under the two conditions, the abrasion resistance of the cylinder sleeve is poor, the service life of the cylinder sleeve is prolonged, the oil consumption is further increased, and even faults such as cylinder pulling and exceeding emission of an automobile engine are caused.
Disclosure of Invention
The invention aims to provide a differential honing cylinder sleeve and a preparation method thereof, which can improve the sliding performance of the inner hole wall of the cylinder sleeve, ensure that the oil storage of the inner hole wall is uniform, reduce oil consumption, effectively improve the wear resistance between the cylinder sleeve and a piston, and further improve the service life of the cylinder sleeve and the stability and reliability of engine operation.
The invention adopts the technical scheme that:
the differential honing cylinder sleeve comprises a cylinder sleeve body, wherein an inner hole is formed in the cylinder sleeve body, honed reticulate patterns are formed in the wall of the inner hole, the included angle between the reticulate patterns and the cross section of the cylinder sleeve is 45 degrees+/-10 degrees, and the reticulate patterns are distributed in a differential mode; parameters of the reticulation texture are: rzR is less than or equal to 1 mu m and less than or equal to 7 mu m, rpk is less than or equal to 0.3 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.8 mu m, rvk is less than or equal to 0.8 mu m and less than or equal to 2.5 mu m, mr1 is less than or equal to 9%, mr2 is less than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.75 mu m; wherein Rz represents average peak-to-valley height, rpk represents peak top reduction, rk represents core roughness, rvk represents valley bottom reduction, mr1 represents minimum metal material rate of roughness center profile, mr2 represents maximum metal material rate of roughness center profile, and Ra represents surface roughness;
the reticulate texture comprises an oil storage type texture and a smooth type texture, the surface roughness of the oil storage type texture is larger than that of the smooth type texture, the position of the oil storage type texture forms a functional oil storage area of the cylinder sleeve, and the position of the smooth type texture forms a smooth transition area of the cylinder sleeve; the inner hole wall is sequentially arranged into an area I, an area II and an area III from top to bottom, the area I is a cylinder sleeve top dead center area, the area III is a cylinder sleeve bottom dead center area, the area above the lower ring bank of the piston oil ring is the area I when the piston moves to the top dead center, the area below the upper ring bank of the piston top ring is the area III when the piston moves to the bottom dead center, the area II is an area between the area I and the area III, and the reticulate patterns of the area I and the area II are different.
The texture parameters of the oil storage type texture are as follows: rz2.ltoreq.Rz7.ltoreq.Rpk.ltoreq.0.3.ltoreq.0.2μm Rk.ltoreq.0.8μm, rvk.ltoreq.1.0μm.ltoreq.2.5μm, mr1.ltoreq.9%, mr2.ltoreq.65%.ltoreq.90%, and Ra.ltoreq.0.75. Mu.m, the texture parameters of the smooth texture being: rpk is less than or equal to 1 mu m and less than or equal to 6.5 mu m, rpk is less than or equal to 0.25 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.5 mu m, mr1 is less than or equal to 9% and less than or equal to 65% Mr2 is less than or equal to 90%, ra is less than or equal to 0.63 mu m, wherein Rpk represents the average peak valley height, rpk represents the reduction of peak top, rk represents the core roughness, rvk represents the reduction of valley bottom, mr1 represents the minimum metal material rate of roughness center profile, mr2 represents the maximum metal material rate of roughness center profile, and Ra represents the surface roughness.
The basic roughness value range of the inner hole wall of the cylinder sleeve body before differential honing is 8-12 mu m.
The cylinder liner body is made of pearlite cast iron, bainite cast iron, carbon steel 45# or carbon steel 20#.
The length of the area I is 15-50 mm, the length of the area II is 30-250 mm, and the length of the area III is 20-80 mm.
The preparation method of the differential honing cylinder sleeve is characterized by comprising the following steps of: the method comprises the following steps:
A. casting a cylinder sleeve blank: preparing a cylinder sleeve casting or a formed steel pipe by adopting a wet coating centrifugal casting process;
B. machining: cutting and preliminary honing are carried out on a cylinder sleeve blank, and the specific process flow is as follows:
rough cutting, rough boring an inner hole, repairing and turning, finely boring the inner hole, semi-finely turning an outer circle, rough honing the inner hole, finely turning the outer circle;
C. honing: b, inputting honing parameters in the numerical control honing equipment, and carrying out finish honing processing on the inner hole wall of the cylinder sleeve obtained in the step B by using the numerical control honing equipment, wherein the honing parameters comprise texture parameters of oil storage type textures and smooth textures; the method specifically comprises the following steps:
selecting honing bars corresponding to the area I, the area II and the area III, bonding the honing bars to the sand strip plates, assembling a honing head, and mounting the honing head to the numerical control honing equipment;
c2, setting processing parameters of the area I, the area II and the area III in the numerical control honing equipment;
and c3, carrying out finish honing processing on the inner hole wall of the cylinder sleeve by the numerical control honing equipment according to the set texture parameters, so that the inner hole wall has differentially honed reticulate textures.
The invention has the following beneficial effects:
(1) The functional oil storage area and the smooth transition area which are distributed differently are formed on the inner hole wall of the cylinder sleeve by arranging the reticulate patterns which are distributed differently on the inner hole wall of the cylinder sleeve, so that the distribution is reasonable, the oil storage of the cylinder sleeve is proper and the whole oil storage is uniform, the lubricating oil is not easy to extrude, the surface lubricating property of the inner hole wall of the cylinder sleeve is ensured, the friction and abrasion between a piston ring and the cylinder sleeve are reduced, the service life of the cylinder sleeve is prolonged, and the safe, stable and reliable operation of an engine is indirectly ensured;
(2) By setting parameters of the oil storage type texture and the smooth type texture, the friction coefficient and the abrasion loss of the invention are obviously lower than those of a common cylinder sleeve, the friction coefficient is smaller than 0.1, the friction coefficient and the abrasion loss between the cylinder sleeve and a piston ring are greatly reduced, the service life of the cylinder sleeve is prolonged, and safety accidents such as cylinder pulling of an engine are effectively avoided;
(3) By adopting the preparation method of the differential honing cylinder sleeve, the honing cylinder sleeve with differential distribution can be prepared, and the manufactured cylinder sleeve has good oil storage function, low friction coefficient and low abrasion loss, and effectively improves the service performance and service life of the cylinder sleeve.
Drawings
Fig. 1 is a schematic cross-sectional structure of a cylinder liner according to the present invention;
FIG. 2 is a flow chart of a method of preparation in the present invention;
fig. 3 is a graph showing a friction coefficient comparison between the first embodiment and a normal cylinder liner;
fig. 4 is a graph showing the wear amount of the first embodiment compared with that of the normal cylinder liner;
fig. 5 is a graph showing friction coefficient comparison between the second embodiment and the normal cylinder liner;
fig. 6 is a graph showing the wear amount of the second embodiment compared with that of the normal cylinder liner;
FIG. 7 is a graph of friction coefficient data for example three;
fig. 8 is a graph showing the abrasion loss ratio of the third embodiment to that of the normal cylinder liner;
FIG. 9 is a graph of friction coefficient data for example four;
fig. 10 is a graph showing the abrasion loss ratio of the fourth embodiment to that of the normal cylinder liner.
Detailed Description
As shown in fig. 1, the invention comprises a cylinder liner body, wherein the cylinder liner body is made of cast iron or carbon steel, pearlitic cast iron, bainitic cast iron, carbon steel 45# or carbon steel 20# is preferably adopted, an inner hole is arranged on the cylinder liner body, honed reticulate patterns are arranged on the wall of the inner hole, the included angle between the reticulate patterns and the cross section of the cylinder liner is 45 degrees+/-10 degrees, the reticulate patterns are distributed in a differentiated mode, and the parameters of the reticulate patterns are as follows: rzR is less than or equal to 1 mu m and less than or equal to 7 mu m, rpk is less than or equal to 0.3 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.8 mu m, rvk is less than or equal to 0.8 mu m and less than or equal to 2.5 mu m, mr1 is less than or equal to 9%, mr2 is less than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.75 mu m; wherein Rz represents average peak-to-valley height, rpk represents peak top reduction, rk represents core roughness, rvk represents valley bottom reduction, mr1 represents minimum metal material rate of roughness center profile, mr2 represents maximum metal material rate of roughness center profile, and Ra represents surface roughness;
the reticulate texture in the reticulate texture parameter range comprises two types of oil storage type texture and smooth type texture, the surface roughness of the oil storage type texture is larger than that of the smooth type texture, the position of the oil storage type texture forms a functional oil storage area of the cylinder liner, and the position of the smooth type texture forms a smooth transition area of the cylinder liner; the hole wall of the inner hole is sequentially arranged into three areas from top to bottom, namely an area I, an area II and an area III, wherein the area I is a cylinder sleeve top dead center area, the area III is a cylinder sleeve bottom dead center area, the area above the lower ring land of the piston oil ring is the area I when the piston moves to the top dead center, the area below the upper ring land of the piston top ring is the area III when the piston moves to the bottom dead center, and the area II is an area between the areas I and III; the length of the zone I is 15 mm-50 mm, the length of the zone II is 30 mm-250 mm, and the length of the zone III is 20 mm-80 mm. The three areas of the reticulate patterns of the area I, the area II and the area III are ultrafine reticulate patterns formed by honing, the ultrafine reticulate patterns of the three areas are distributed by adopting differential areas, namely, the reticulate patterns of the area I, the area II and the area III are all oil storage type patterns or smooth type patterns, and the reticulate patterns of the area I and the area II are different.
The texture distribution of zones I, II and III exists in four combinations:
(1) The walls of the areas I and III adopt smooth textures, and the wall of the area II adopts oil storage textures;
(2) The walls of the areas I and III adopt oil storage type textures, and the walls of the areas II adopt smooth textures;
(3) The wall of the area I adopts an oil storage type texture, and the walls of the areas II and III adopt smooth textures;
(4) The wall of the area I adopts smooth texture, and the walls of the area II and the area III adopt oil storage texture.
The texture parameters of the oil storage type texture are set as follows: rz2.ltoreq.Rz7.ltoreq.Rpk.ltoreq.0.3.ltoreq.0.2μm Rk.ltoreq.0.8μm, rvk.ltoreq.1.0μm.ltoreq.2.5μm, mr1.ltoreq.9%, mr2.ltoreq.65%.ltoreq.90%, ra.ltoreq.0.75 μm, the texture parameters of the smooth texture being set as: rpk is less than or equal to 1 mu m and less than or equal to 6.5 mu m, rpk is less than or equal to 0.25 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.5 mu m, mr1 is less than or equal to 9% and less than or equal to 65% Mr2 is less than or equal to 90%, ra is less than or equal to 0.63 mu m, wherein Rpk represents the average peak valley height, rpk represents the reduction of peak top, rk represents the core roughness, rvk represents the reduction of valley bottom, mr1 represents the minimum metal material rate of roughness center profile, mr2 represents the maximum metal material rate of roughness center profile, and Ra represents the surface roughness; the basic roughness value range of the hole wall of the inner hole before differential honing is preferably 8-12 mu m; the inner hole wall behind the finish honing inner hole is provided with a reticulate grain for differential honing.
For a better understanding of the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings.
Embodiment one:
in the embodiment, the value range of the basic roughness of the hole wall of the inner hole before honing is preferably 10-12 mu m, the area I is the top dead center area of the cylinder sleeve, and the overall dimension length of the area I is 40mm; the area II is an area between the area I and the area III, the overall size length of the area II is 140mm, the area III is a cylinder sleeve bottom dead center area, and the overall size length of the area III is 50mm;
the reticulate grain honing of the hole walls of the area I and the area III is an oil storage grain with a deeper depth, and the reticulate grain honing of the hole walls of the area II is a smooth grain with a shallower depth;
the texture parameters of the reticulation of the zone I honing are as follows: rzR is more than or equal to 2 μm and less than or equal to 7 μm, rpk is more than or equal to 0.3 μm, rk is more than or equal to 0.2 μm and less than or equal to 0.8 μm, rvk is more than or equal to 1.0 μm and less than or equal to 2.5 μm, mr1 is less than or equal to 9%, mr2 is more than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.75 μm;
the texture parameters of the II area honing are as follows: rzR is less than or equal to 1 mu m and less than or equal to 6.5 mu m, rpk is less than or equal to 0.25 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.5 mu m, rvk is less than or equal to 0.8 mu m and less than or equal to 1.5 mu m, mr1 is less than or equal to 9%, mr2 is less than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.63 mu m;
the texture parameters of the III area honing are as follows: rzR is more than or equal to 2 μm and less than or equal to 7 μm, rpk is more than or equal to 0.3 μm, rk is more than or equal to 0.2 μm and less than or equal to 0.8 μm, rvk is more than or equal to 1.0 μm and less than or equal to 2.5 μm, mr1 is less than or equal to 9%, mr2 is more than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.75 μm;
where Rz represents the average peak-to-valley height, rpk represents the reduction of peak top, rk represents the core roughness, rvk represents the reduction of valley bottom, mr1 represents the minimum metal material rate of the roughness center profile, mr2 represents the maximum metal material rate of the roughness center profile, and Ra represents the surface roughness.
As shown in fig. 2, the method for manufacturing the cylinder liner in the present embodiment includes the steps of:
A. casting a cylinder sleeve blank: preparing a pearlite cast iron casting by adopting a wet coating centrifugal casting process;
B. machining: cutting and preliminary honing are carried out on a cylinder sleeve blank, and the specific process flow is as follows:
rough cutting, rough boring an inner hole, repairing and turning, finely boring the inner hole, semi-finely turning an outer circle, rough honing the inner hole, finely turning the outer circle;
C. honing: b, inputting honing parameters into a Z800-0180 model numerical control honing device, and carrying out finish honing processing on the inner hole wall of the cylinder sleeve obtained in the step B by using the numerical control honing device; the method specifically comprises the following steps:
selecting honing bars corresponding to the area I, the area II and the area III, bonding the honing bars to the sand strip plates, assembling a honing head, and mounting the honing head to the numerical control honing equipment;
c2, setting processing parameters of the area I, the area II and the area III in the numerical control honing equipment;
and c3, carrying out finish honing processing on the inner hole wall of the cylinder sleeve by the numerical control honing equipment according to the set texture parameters, so that the inner hole wall of the cylinder sleeve has the texture of different honing, and the wear resistance of the cylinder sleeve and the piston ring is improved.
In the embodiment, the reticulate patterns are distributed in different areas, so that the upper and lower areas are deep in ultramicro reticulate patterns, the oil is fully stored, the middle area is smooth in ultramicro reticulate patterns, the oil is properly stored, the whole oil is uniformly stored, lubricating oil is not easy to extrude, the inner surface of the cylinder sleeve is smooth, as shown in experimental data of fig. 3 and fig. 4, under the load of 50N and 100N, the friction coefficient and the abrasion loss of the piston ring are obviously lower than those of a common cylinder sleeve, the friction abrasion loss between the piston ring and an inner hole is reduced, the friction coefficient is less than 0.1, the friction coefficient and the abrasion loss between the cylinder sleeve and the piston ring are greatly reduced, the service life of the cylinder sleeve is prolonged, and safety accidents such as cylinder pulling of an engine are effectively avoided.
Embodiment two:
in the embodiment, the cylinder sleeve body is formed by processing a cylinder sleeve blank of a bainite cast iron casting prepared by adopting a wet coating centrifugal casting process, the range of the basic roughness of the hole wall of an inner hole before honing is preferably 10-12 mu m, the area I is a cylinder sleeve top dead center area, and the overall dimension length of the area I is 40mm; the area II is an area between the area I and the area III, the overall size length of the area II is 140mm, the area III is a cylinder sleeve bottom dead center area, and the overall size length of the area III is 50mm;
honing the reticulate texture of the hole wall of the area I into an oil storage type texture with a deeper depth, and honing the reticulate texture of the hole walls of the area II and the area III into a smooth texture with a shallower depth;
the texture parameters of the reticulation of the zone I honing are as follows: rzR is more than or equal to 2 μm and less than or equal to 7 μm, rpk is more than or equal to 0.3 μm, rk is more than or equal to 0.2 μm and less than or equal to 0.8 μm, rvk is more than or equal to 1.0 μm and less than or equal to 2.5 μm, mr1 is less than or equal to 9%, mr2 is more than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.75 μm;
the texture parameters of the II area honing are as follows: rzR is less than or equal to 1 mu m and less than or equal to 6.5 mu m, rpk is less than or equal to 0.25 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.5 mu m, rvk is less than or equal to 0.8 mu m and less than or equal to 1.5 mu m, mr1 is less than or equal to 9%, mr2 is less than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.63 mu m;
the texture parameters of the III area honing are as follows: rzR is less than or equal to 1 mu m and less than or equal to 6.5 mu m, rpk is less than or equal to 0.25 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.5 mu m, rvk is less than or equal to 0.8 mu m and less than or equal to 1.5 mu m, mr1 is less than or equal to 9%, mr2 is less than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.63 mu m;
where Rz represents the average peak-to-valley height, rpk represents the reduction of peak top, rk represents the core roughness, rvk represents the reduction of valley bottom, mr1 represents the minimum metal material rate of the roughness center profile, mr2 represents the maximum metal material rate of the roughness center profile, and Ra represents the surface roughness.
In the embodiment, the reticulate patterns are distributed in different areas, so that the upper and lower areas are deep in ultramicro reticulate patterns, the oil storage is sufficient, the middle area is smooth in ultramicro reticulate patterns, the oil storage is proper, the whole oil storage is uniform, lubricating oil is not easy to extrude, the inner surface of the cylinder sleeve is smooth, as shown in experimental data of fig. 5 and 6, under the load of 50N and 100N, the friction coefficient and the abrasion loss of the piston ring are obviously lower than those of a common cylinder sleeve, the friction abrasion loss between the piston ring and an inner hole is reduced, the friction coefficient is lower than 0.1, the service life of the cylinder sleeve is prolonged, and safety accidents such as engine cylinder pulling are effectively avoided.
Embodiment III:
in the embodiment, the cylinder sleeve body is formed by processing a cylinder sleeve blank made of carbon steel 45# material, the basic roughness value range of the hole wall of the inner hole before honing is preferably 10-12 mu m, the area I is the cylinder sleeve top dead center area, and the overall dimension length of the area I is 25mm; the area II is an area between the area I and the area III, the overall dimension length of the area II is 100mm, the area III is a cylinder sleeve bottom dead center area, and the overall dimension length of the area III is 40mm;
the reticulate grain honing of the hole walls of the area I and the area III is an oil storage grain with a deeper depth, and the reticulate grain honing of the hole walls of the area II is a smooth grain with a shallower depth;
the texture parameters of the reticulation of the zone I honing are as follows: rzR is more than or equal to 2 μm and less than or equal to 7 μm, rpk is more than or equal to 0.3 μm, rk is more than or equal to 0.2 μm and less than or equal to 0.8 μm, rvk is more than or equal to 1.0 μm and less than or equal to 2.5 μm, mr1 is less than or equal to 9%, mr2 is more than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.75 μm;
the texture parameters of the II area honing are as follows: rzR is less than or equal to 1 mu m and less than or equal to 6.5 mu m, rpk is less than or equal to 0.25 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.5 mu m, rvk is less than or equal to 0.8 mu m and less than or equal to 1.5 mu m, mr1 is less than or equal to 9%, mr2 is less than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.63 mu m;
the texture parameters of the III area honing are as follows: rzR is more than or equal to 2 μm and less than or equal to 7 μm, rpk is more than or equal to 0.3 μm, rk is more than or equal to 0.2 μm and less than or equal to 0.8 μm, rvk is more than or equal to 1.0 μm and less than or equal to 2.5 μm, mr1 is less than or equal to 9%, mr2 is more than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.75 μm;
where Rz represents the average peak-to-valley height, rpk represents the reduction of peak top, rk represents the core roughness, rvk represents the reduction of valley bottom, mr1 represents the minimum metal material rate of the roughness center profile, mr2 represents the maximum metal material rate of the roughness center profile, and Ra represents the surface roughness.
In the embodiment, the reticulate patterns are distributed in different areas, so that the upper and lower areas are deep in superfine reticulate patterns, oil is fully stored, the middle area is smooth in superfine reticulate patterns, the oil is properly stored, the whole oil is uniformly stored, lubricating oil is not easy to extrude, the inner surface of a cylinder sleeve is smooth, as shown in experimental data of fig. 7 and 8, under the load of 50N and 100N, the friction coefficient and the abrasion loss of the piston ring are obviously lower than those of a common cylinder sleeve, the friction abrasion loss between the piston ring and an inner hole is reduced, the friction coefficient is smaller than 0.1, the service life of the cylinder sleeve is prolonged, and safety accidents such as engine cylinder pulling and the like are effectively avoided.
Embodiment four:
in the embodiment, the cylinder sleeve body is formed by processing a cylinder sleeve blank made of carbon steel 20# material, the value range of the basic roughness of the hole wall of the inner hole before honing is preferably 10-12 mu m, the area I is the cylinder sleeve top dead center area, and the overall dimension length of the area I is 25mm; the area II is an area between the area I and the area III, the overall dimension length of the area II is 100mm, the area III is a cylinder sleeve bottom dead center area, and the overall dimension length of the area III is 40mm;
the reticulate grain honing of the hole walls of the area I and the area III is a smooth grain with shallower depth, and the reticulate grain honing of the hole wall of the area II is an oil storage grain with deeper depth;
the texture parameters of the reticulation of the zone I honing are as follows: rzR is less than or equal to 1 mu m and less than or equal to 6.5 mu m, rpk is less than or equal to 0.25 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.5 mu m, rvk is less than or equal to 0.8 mu m and less than or equal to 1.5 mu m, mr1 is less than or equal to 9%, mr2 is less than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.63 mu m;
the texture parameters of the II area honing are as follows: rzR is more than or equal to 2 μm and less than or equal to 7 μm, rpk is more than or equal to 0.3 μm, rk is more than or equal to 0.2 μm and less than or equal to 0.8 μm, rvk is more than or equal to 1.0 μm and less than or equal to 2.5 μm, mr1 is less than or equal to 9%, mr2 is more than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.75 μm;
the texture parameters of the III area honing are as follows: rzR is less than or equal to 1 mu m and less than or equal to 6.5 mu m, rpk is less than or equal to 0.25 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.5 mu m, rvk is less than or equal to 0.8 mu m and less than or equal to 1.5 mu m, mr1 is less than or equal to 9%, mr2 is less than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.63 mu m;
where Rz represents the average peak-to-valley height, rpk represents the reduction of peak top, rk represents the core roughness, rvk represents the reduction of valley bottom, mr1 represents the minimum metal material rate of the roughness center profile, mr2 represents the maximum metal material rate of the roughness center profile, and Ra represents the surface roughness.
In the embodiment, the reticulate patterns are distributed in different areas, so that the upper and lower areas are deep in superfine reticulate patterns, oil is fully stored, the middle area is smooth in superfine reticulate patterns, the oil is properly stored, the whole oil is uniformly stored, lubricating oil is not easy to extrude, the inner surface of a cylinder sleeve is smooth, as shown in experimental data of fig. 9 and 10, under the load of 50N and 100N, the friction coefficient and the abrasion loss of the piston ring are obviously lower than those of a common cylinder sleeve, the friction abrasion loss between the piston ring and an inner hole is reduced, the friction coefficient is smaller than 0.1, the service life of the cylinder sleeve is prolonged, and safety accidents such as engine cylinder pulling and the like are effectively avoided.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some or all of the technical features thereof, without departing from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the invention.
Claims (6)
1. The utility model provides a differentiation honing cylinder jacket, includes the cylinder jacket body, is equipped with hole, its characterized in that on the cylinder jacket body: the hole wall of the inner hole is provided with honed reticulate patterns, the included angle between the reticulate patterns and the cross section of the cylinder sleeve is 45 degrees+/-10 degrees, and the reticulate patterns are distributed in a differentiated mode; parameters of the reticulation texture are: rzR is less than or equal to 1 mu m and less than or equal to 7 mu m, rpk is less than or equal to 0.3 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.8 mu m, rvk is less than or equal to 0.8 mu m and less than or equal to 2.5 mu m, mr1 is less than or equal to 9%, mr2 is less than or equal to 65% and less than or equal to 90%, and Ra is less than or equal to 0.75 mu m; wherein Rz represents average peak-to-valley height, rpk represents peak top reduction, rk represents core roughness, rvk represents valley bottom reduction, mr1 represents minimum metal material rate of roughness center profile, mr2 represents maximum metal material rate of roughness center profile, and Ra represents surface roughness;
the reticulate texture comprises an oil storage type texture and a smooth type texture, the surface roughness of the oil storage type texture is larger than that of the smooth type texture, the position of the oil storage type texture forms a functional oil storage area of the cylinder sleeve, and the position of the smooth type texture forms a smooth transition area of the cylinder sleeve; the inner hole wall is sequentially arranged into an area I, an area II and an area III from top to bottom, the area I is a cylinder sleeve top dead center area, the area III is a cylinder sleeve bottom dead center area, the area above the lower ring bank of the piston oil ring is the area I when the piston moves to the top dead center, the area below the upper ring bank of the piston top ring is the area III when the piston moves to the bottom dead center, the area II is an area between the area I and the area III, and the reticulate patterns of the area I and the area II are different.
2. The differentiated honing cylinder liner according to claim 1, characterized in that: the texture parameters of the oil storage type texture are as follows: rz2.ltoreq.Rz7.ltoreq.Rpk.ltoreq.0.3.ltoreq.0.2μm Rk.ltoreq.0.8μm, rvk.ltoreq.1.0μm.ltoreq.2.5μm, mr1.ltoreq.9%, mr2.ltoreq.65%.ltoreq.90%, and Ra.ltoreq.0.75. Mu.m, the texture parameters of the smooth texture being: rpk is less than or equal to 1 mu m and less than or equal to 6.5 mu m, rpk is less than or equal to 0.25 mu m, rk is less than or equal to 0.2 mu m and less than or equal to 0.5 mu m, mr1 is less than or equal to 9% and less than or equal to 65% Mr2 is less than or equal to 90%, ra is less than or equal to 0.63 mu m, wherein Rpk represents the average peak valley height, rpk represents the reduction of peak top, rk represents the core roughness, rvk represents the reduction of valley bottom, mr1 represents the minimum metal material rate of roughness center profile, mr2 represents the maximum metal material rate of roughness center profile, and Ra represents the surface roughness.
3. The differentiated honing cylinder liner according to claim 2, characterized in that: the basic roughness value range of the inner hole wall of the cylinder sleeve body before differential honing is 8-12 mu m.
4. The differentiated honing cylinder liner according to claim 2, characterized in that: the cylinder liner body is made of pearlite cast iron, bainite cast iron, carbon steel 45# or carbon steel 20#.
5. The differentiated honing cylinder liner according to claim 2, characterized in that: the length of the area I is 15-50 mm, the length of the area II is 30-250 mm, and the length of the area III is 20-80 mm.
6. The method of manufacturing a differentiated honing cylinder liner according to claim 2, characterized by: the method comprises the following steps:
A. casting a cylinder sleeve blank: preparing a cylinder sleeve casting or a formed steel pipe by adopting a wet coating centrifugal casting process;
B. machining: cutting and preliminary honing are carried out on a cylinder sleeve blank, and the specific process flow is as follows:
rough cutting, rough boring an inner hole, repairing and turning, finely boring the inner hole, semi-finely turning an outer circle, rough honing the inner hole, finely turning the outer circle;
C. honing: b, inputting honing parameters in the numerical control honing equipment, and carrying out finish honing processing on the inner hole wall of the cylinder sleeve obtained in the step B by using the numerical control honing equipment, wherein the honing parameters comprise texture parameters of oil storage type textures and smooth textures; the method specifically comprises the following steps:
selecting honing bars corresponding to the area I, the area II and the area III, bonding the honing bars to the sand strip plates, assembling a honing head, and mounting the honing head to the numerical control honing equipment;
c2, setting processing parameters of the area I, the area II and the area III in the numerical control honing equipment;
and c3, carrying out finish honing processing on the inner hole wall of the cylinder sleeve by the numerical control honing equipment according to the set texture parameters, so that the inner hole wall has differentially honed reticulate textures.
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| JP6553275B1 (en) | 2018-11-28 | 2019-07-31 | Ｔｐｒ株式会社 | Cylinder liner and method of manufacturing the same |
| CN110836148A (en) * | 2019-12-10 | 2020-02-25 | 中原内配集团股份有限公司 | Honing cylinder sleeve and preparation method thereof |
| CN111594336A (en) * | 2020-05-27 | 2020-08-28 | 河南中原吉凯恩气缸套有限公司 | Special-shaped inner hole honing cylinder sleeve and preparation method thereof |
| US20230193847A1 (en) * | 2020-06-11 | 2023-06-22 | Tpr Co., Ltd. | Cylinder Liner and Cylinder Bore |
| CN112658965B (en) * | 2020-12-24 | 2022-09-23 | 潍柴动力股份有限公司 | Method for processing reticulate pattern structure of reticulate pattern cylinder sleeve and reticulate pattern cylinder sleeve |
| CN113829132B (en) * | 2021-09-23 | 2022-08-26 | 第一拖拉机股份有限公司 | Cylinder hole of cylinder-sleeve-free diesel engine and machining method of reticulate pattern parameters of cylinder hole platform |
| DE102022102054A1 (en) * | 2022-01-28 | 2023-08-03 | Ks Kolbenschmidt Gmbh | Cylinder liner and internal combustion engine |
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