CN111594336A - Special-shaped inner hole honing cylinder sleeve and preparation method thereof - Google Patents
Special-shaped inner hole honing cylinder sleeve and preparation method thereof Download PDFInfo
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- CN111594336A CN111594336A CN202010461806.6A CN202010461806A CN111594336A CN 111594336 A CN111594336 A CN 111594336A CN 202010461806 A CN202010461806 A CN 202010461806A CN 111594336 A CN111594336 A CN 111594336A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 230000007704 transition Effects 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 claims description 16
- 229910001651 emery Inorganic materials 0.000 claims description 14
- 238000007514 turning Methods 0.000 claims description 12
- 229910001018 Cast iron Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 6
- 239000010962 carbon steel Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910001562 pearlite Inorganic materials 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 4
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000009750 centrifugal casting Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910001563 bainite Inorganic materials 0.000 claims description 2
- 206010066054 Dysmorphism Diseases 0.000 claims 1
- 238000005299 abrasion Methods 0.000 description 5
- 239000010705 motor oil Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a special-shaped inner bore honing cylinder sleeve and a preparation method thereof in the technical field of cylinder sleeve inner bore processing, wherein one end of a special-shaped inner bore honing cylinder sleeve body is a large end, the other end of the special-shaped inner bore honing cylinder sleeve body is a small end, the shape of an inner bore is processed into sections with different shapes according to different actual temperatures of different sections of the cylinder sleeve at working temperature, so that the inner bore of the cylinder sleeve is integrally in a straight cylinder shape under working conditions, the section corresponding to the large end is in a straight cylinder shape, the shapes of the other sections are in a cone cylinder shape or an arc cylinder shape, the sections are in smooth transition connection, the inner bore diameter of the large end is smaller than that of the small end, the inner bore diameter of the straight cylinder section is smaller than the minimum inner bore diameter of the other sections, and. The invention changes the shape of the inner hole of the cylinder sleeve by analyzing the temperature of the inner hole of the cylinder sleeve in the working state, reduces the friction coefficient, reduces the tail gas emission, and improves the service performance and the service life of the cylinder sleeve.
Description
Technical Field
The invention belongs to the technical field of cylinder sleeve inner hole processing, and particularly relates to a special-shaped inner hole honing cylinder sleeve and a preparation method thereof.
Background
The cylinder sleeve is one of key parts of an engine, the inner hole of the cylinder sleeve is of a cylindrical structure, the cylinder sleeve is arranged in a cylinder body hole of an engine body during working, the upper end of the cylinder sleeve is tightly pressed and fixed by a cylinder cover, and a piston reciprocates in the inner hole of the cylinder sleeve, so that the shape of the inner hole of the cylinder sleeve directly influences the loss of friction work of the engine, the consumption of engine oil, the emission of tail gas and the service life of the engine. At present, the cylinder liner hole is straight tube shape under non-operating condition, because the cylinder liner of doing work can thermal deformation during operating condition, the shape of hole changes because the temperature difference of different regions causes, and the straight cylindric of hole can't keep the coefficient of friction that can lead to piston and cylinder liner inner wall to increase, and the loss that leads to the friction work is bigger, and the machine oil consumption increases, and the tail gas emission risees, and causes the cross gas easily, reduces the life of cylinder liner and engine. Especially, as the social development demands higher and higher emission of automobiles, the technical development of cylinder liner production is required to be greatly improved.
At present, the shape processing of cylinder liner hole mainly uses the honing technology as the main, and present cylinder liner hole is straight tube shape, and the hole shape in cylinder liner working area, non-working area and different wall thickness region is all the same under non-operating condition, and the cylinder liner hole can take place to warp under operating condition and lead to each regional hole shape difference to lead to the problem such as friction work increase, calorific loss increase, engine oil consumption increase, cylinder liner life-span reduction and emission increase.
Disclosure of Invention
In order to solve the technical problem, the invention provides a special-shaped inner hole honing cylinder sleeve, which comprises a cylinder sleeve body, wherein the cylinder sleeve body is provided with an inner hole, one end of the cylinder sleeve body is a big end, the other end is a small end, the excircle diameter of the big end is larger than that of the small end, the shape of the inner hole is processed into sections with different shapes according to the actual temperature difference of different sections of the cylinder sleeve under the working temperature, so that the inner hole of the cylinder sleeve is integrally in a straight cylinder shape under the working condition, wherein the section corresponding to the big end adopts a straight cylinder shape, the shape of the rest sections adopts a cone cylinder shape or an arc cylinder shape, and the sections are connected in a smooth transition manner, the inner bore diameter of the large end is smaller than that of the small end, the inner bore diameter of the straight cylindrical section is smaller than the minimum inner bore diameter of other sections, and the inner bore diameters of other sections are gradually increased from the large end to the small end of the cylinder sleeve.
Preferably, the inner bore of the cylinder sleeve comprises two sections, the section corresponding to the small end is a conical cylindrical section, and the minimum inner bore diameter of the conical cylindrical section is greater than or equal to the inner bore diameter of the straight cylindrical section.
Preferably, the inner bore of the cylinder liner comprises three sections, the section corresponding to the small end is a first conical cylindrical section, the section between the large end and the small end is a second conical cylindrical section, the minimum inner bore diameter of the second conical cylindrical section is greater than or equal to the inner bore diameter of the straight cylindrical section, and the maximum inner bore diameter of the second conical cylindrical section is less than or equal to the minimum inner bore diameter of the first conical cylindrical section.
Preferably, when the cylinder sleeve inner bore is provided with a conical section, the taper of the conical section is 20 μm to 100 μm.
Preferably, the material of the cylinder sleeve body adopts pearlite cast iron, bainite cast iron, carbon steel 45#, carbon steel 50# or carbon steel 20 #.
As another aspect of the present invention, the present invention further provides a method for preparing a special-shaped bore honing cylinder liner, comprising the following steps:
61) cylinder liner blank: preparing a cylinder sleeve casting or a formed steel pipe by adopting a wet coating centrifugal casting process;
62) machining: cutting and primary honing are carried out on a cylinder sleeve blank, and the specific process flow comprises rough turning, rough boring of an inner hole, turning, fine boring of the inner hole, semi-fine turning of an excircle, rough grinding of the inner hole, fine turning of the excircle and semi-fine grinding;
63) fine grinding: selecting abrasive strips according to reticulate pattern parameters of an inner hole of a cylinder sleeve, inputting honing parameters in numerical control honing equipment, and carrying out fine honing processing on the inner hole wall of the cylinder sleeve obtained in the step 62) by using the numerical control honing equipment, wherein the honing parameters comprise upper and lower reversing points of a grinding head, and honing times, stepping speeds and honing pressures corresponding to different sections of the inner hole, which are adjusted according to the shapes of the different sections of the inner hole, and the fine grinding step comprises the following steps:
631) selecting a corresponding honing emery stick, bonding the honing emery stick to the emery stick plate, assembling into a honing head, and installing the honing head on numerical control honing equipment, wherein the honing head adopts a short honing head, the length of the honing head is 100mm, and the length of the emery stick plate is 60 mm;
632) setting honing parameters of different sections of the inner bore of the cylinder sleeve in the numerical control honing equipment, wherein the honing parameters of the sections are mainly distinguished as different distances of reversing points and different corresponding honing times; the reversing point distance and the honing times are determined according to the specification of the abrasive bars, the bore taper of each section of the cylinder sleeve and the length of each section of the cylinder sleeve, the honing times are equal to the bore taper of the cylinder sleeve/the honing amount of each section of the abrasive bars, and the reversing point distance is equal to the length of each section of the cylinder sleeve/the honing times;
633) the numerical control honing equipment carries out fine honing processing on the hole wall of the inner hole of the cylinder sleeve according to the set honing parameters, and the inner hole is continuously honed at different positions through one-step forming, so that the hole wall of the inner hole presents a designed shape.
Preferably, the material of the cylinder sleeve is pearlite cast iron, and the calculation method of the taper of the inner hole of the cylinder sleeve is as follows:
71) determining the linear expansion coefficient K of the cylinder liner material, wherein K is a constant, and the linear expansion coefficient K of the pearlite cast iron at the working temperature of 50-200 ℃ is 11.66 × 10-3；
72) Determining the temperature variation delta E of the cylinder sleeve in the working state and the non-working state, wherein the delta E is the temperature of the cylinder sleeve in the working state-the temperature of the cylinder sleeve in the non-working state;
73) and calculating the inner bore taper X of the cylinder sleeve, and obtaining the inner bore taper X of the cylinder sleeve according to a taper calculation formula X ═ Delta E multiplied by phi D multiplied by K, wherein phi D is the inner bore diameter of the cylinder sleeve.
Preferably, the calculation method of the honing pressure is as follows:
81) determining the honing pressure P: p ═ Rvk × c, where c is the honing coefficient, and c is taken to be 0.01 empirically; rvk is the average groove depth of the reticulate pattern of the inner hole of the cylinder sleeve;
82) determining the contact area S of the sand bars and the inner hole of the cylinder sleeve, wherein the S is L multiplied by D multiplied by N, the L is the length of the sand bars, the D is the width of the sand bars, the N is the number of the sand bars on the honing head, and the N is 6 according to experience;
83) calculating the honing pressure F: and F is P multiplied by S, wherein S is the contact area of the sand strip and the inner bore of the cylinder sleeve.
The invention also comprises other steps which can normally implement the preparation method of the special-shaped inner bore honing cylinder sleeve, and the other steps are conventional technical means in the field. In addition, the steps which are not limited in the invention adopt the conventional technical means in the field.
The working principle of the invention is that by analyzing the thermal deformation of the cylinder sleeve in the installation process, the section with high working temperature of the cylinder sleeve is larger in thermal deformation, and the inner hole is larger in thermal expansion, otherwise, the lower the working temperature is, the smaller the thermal deformation of the cylinder sleeve is, and the smaller the thermal expansion of the inner hole is, by designing the inner hole of the cylinder sleeve into a special-shaped structure combining a straight cylinder section and a conical cylinder section or an arc cylinder section, the whole cylinder sleeve of the engine is ensured to be in an ideal straight cylinder under the working condition, so that the impact action of a piston on the cylinder wall is reduced, the vibration is reduced, and meanwhile, the gap between the piston skirt part and the inner hole of the skirt part of the cylinder sleeve can be designed to be larger properly, so that.
The invention has the following beneficial effects:
(1) through changing the shape of the inner hole of the cylinder sleeve, the inner hole wall of the cylinder sleeve is in a straight cylinder shape under the working state, the friction and the abrasion between a piston ring and the inner wall of the cylinder sleeve are effectively reduced, the loss of friction work and heat is reduced, the problems of air leakage, engine oil burning and too fast abrasion of the cylinder sleeve are improved, the service life of the cylinder sleeve is prolonged, and the safe, stable and reliable work of an engine is indirectly guaranteed.
(2) The shape of the inner hole of the cylinder sleeve is changed by analyzing the temperature of the inner hole of the cylinder sleeve in the working state of the cylinder sleeve, so that the friction coefficient and the abrasion loss of the invention are obviously lower than those of the common cylinder sleeve, the heat loss caused by friction working is reduced, the friction coefficient and the abrasion loss between the cylinder sleeve and a piston ring are greatly reduced, the thermal efficiency of an engine is improved, the service life of the cylinder sleeve is prolonged, and the occurrence of safety accidents such as cylinder pulling of the engine is effectively reduced.
(3) By adopting the preparation method of the inner-hole special-shaped honing cylinder sleeve, the honing cylinder sleeve with the special-shaped inner hole can be prepared, the prepared friction coefficient is low, the abrasion loss is low, the exhaust emission is reduced, the service performance and the service life of the cylinder sleeve are effectively improved, and the exhaust emission of an engine is more suitable for the increasingly improved exhaust emission standard.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic diagram of the overall structure of the special-shaped inner bore honing cylinder liner of the invention.
Detailed Description
The present invention will be described more clearly with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention. All other embodiments, which can be obtained by those skilled in the art without any inventive step based on the embodiments of the present invention, should be included in the scope of the present invention.
Example 1
As shown in fig. 1, the invention provides a special-shaped inner bore honing cylinder liner, which comprises a cylinder liner body, wherein the cylinder liner body is made of pearlite cast iron, the cylinder liner body is provided with an inner bore, one end of the cylinder liner body is a large end 1, the other end of the cylinder liner body is a small end 2, the outer diameter of the large end 1 is larger than that of the small end 2, the shape of the inner bore is processed into two sections with different shapes according to different actual temperatures of different sections of the cylinder liner at working temperatures, so that the inner bore of the cylinder liner is integrally in a straight cylinder shape under a working condition, wherein the actual temperature of the section corresponding to the large end 1 is 180-240 ℃ under the working condition, a straight cylinder section 3 is adopted, the inner bore diameter D of the straight cylinder section 3 is 132 ± 0.01mm, the length L1 is 50 ± 10mm, the actual temperature of the section corresponding to the small end 2 under the working condition is 70-200 ℃, the length L2 of the conical cylindrical section 4 is 190mm, the taper of the conical cylindrical section 4 is 40 μm +/-5 μm, the two sections are connected in a smooth transition mode, the inner aperture of the large end 1 is smaller than that of the small end 2, the inner aperture of the straight cylindrical section 3 is smaller than the minimum inner aperture of the conical cylindrical section 4, and the small end 2 corresponds to the maximum inner aperture of the conical cylindrical section 4.
The working principle of the invention is that by analyzing the thermal deformation of the cylinder sleeve in the installation process, the section with high working temperature of the cylinder sleeve is larger in thermal deformation, and the inner hole is larger in thermal expansion, otherwise, the lower the working temperature is, the smaller the thermal deformation of the cylinder sleeve is, and the smaller the thermal expansion of the inner hole is, by designing the inner hole of the cylinder sleeve into a special-shaped structure combining the straight cylindrical section 3 and the conical cylindrical section 4, the whole cylinder sleeve of the engine is ensured to be in an ideal straight cylindrical shape under the working condition, thereby reducing the impact action of a piston on the cylinder wall and reducing the vibration, and simultaneously, the gap between the piston skirt part and the inner hole of the skirt part of the cylinder sleeve can be designed to be larger properly, so that the friction.
Example 2
As shown in fig. 1, the invention also provides a preparation method of the special-shaped inner bore honing cylinder liner, which comprises the following steps:
61) cylinder liner blank: preparing a cylinder sleeve casting or a formed steel pipe by adopting a wet coating centrifugal casting process, wherein the material is pearlitic cast iron;
62) machining: cutting and primary honing are carried out on a cylinder sleeve blank, and the specific process flow comprises rough turning, rough boring of an inner hole, turning, fine boring of the inner hole, semi-fine turning of an excircle, rough grinding of the inner hole, fine turning of the excircle and semi-fine grinding;
63) fine grinding: selecting abrasive strips according to reticulate pattern parameters of an inner hole of a cylinder sleeve, inputting honing parameters in numerical control honing equipment, and carrying out fine honing processing on the inner hole wall of the cylinder sleeve obtained in the step 62) by using the numerical control honing equipment, wherein the honing parameters comprise upper and lower reversing points of a grinding head, and honing times, stepping speeds and honing pressures corresponding to different sections of the inner hole, which are adjusted according to the shapes of the different sections of the inner hole, and the fine grinding step comprises the following steps:
631) selecting a corresponding honing emery stick, bonding the honing emery stick to the emery stick plate, assembling into a honing head, and installing the honing head on the numerical control honing equipment, wherein the honing head adopts a short honing head, the length of the honing head is 100mm, the length of the emery stick plate is 60mm, and considering that an air hole is arranged on the honing head, the effective honing length of the emery stick during honing is 50mm for protecting the emery stick.
632) Setting honing parameters of different sections of the inner bore of the cylinder sleeve in the numerical control honing equipment, wherein the honing parameters of the sections are mainly distinguished as different distances of reversing points and different corresponding honing times; the reversing point distance and the honing times are determined according to the specification of the abrasive bars, the bore taper of each section of the cylinder sleeve and the length of each section of the cylinder sleeve, the honing times are equal to the bore taper of the cylinder sleeve/the honing amount of each section of the abrasive bars, and the reversing point distance is equal to the length of each section of the cylinder sleeve/the honing times; taking the special-shaped inner bore honing cylinder sleeve with the inner bore diameter of 132mm in the straight cylindrical section 3 as an example, the cylinder sleeve is used in a 12-liter engine, the included angle between the reticulate pattern and the cross section of the cylinder sleeve is 45 degrees +/-10 degrees, the honing pressure is 150-160 kg when the inner bore is finely ground, the stepping speed is 1.0 mu m/s, the through grinding is firstly carried out to grind the whole size of the inner bore to the size of the inner bore of the straight cylindrical section 3, then the lower reversing point is lifted by 2mm each time from the minimum diameter of the conical cylindrical section 2, and the total lifting is 70 times.
633) The numerical control honing equipment carries out fine honing processing on the wall of the inner hole of the cylinder sleeve according to the honing parameters, and continuously honing different positions of the inner hole by one-step forming, so that the wall of the inner hole presents a designed shape, namely the length of the inner hole of the straight cylindrical section 3 corresponding to the big end 1 is 50mm, the inner hole diameter is 132mm, and the tolerance is-0.02 to 0 mm; the inner hole length of the conical cylindrical section 4 corresponding to the small end 2 is 190mm, the taper is 0.04mm, the inner hole of the large end 1 is small, and the inner hole of the small end 2 is large.
The inner hole of the special-shaped inner hole honing cylinder sleeve prepared according to the invention is integrally in a cone cylinder shape, due to thermal expansion in the working state of the engine, the working temperatures in different areas are different in expansion coefficient, the shapes of different positions of the inner hole of the cylinder sleeve are different in the non-working state, the inner hole of the cylinder sleeve deformed by heat in the working state is in a straight cylinder shape, and the inner hole of the straight cylinder section 3 is the special-shaped inner hole honing cylinder sleeve of 132mm as an example, the friction heat loss of the engine is reduced by 60 percent, the engine oil consumption is reduced by 20 percent, the exhaust emission is reduced by 3 to 8 percent per kilometer, the occurrence of safety problems such as cylinder pulling is effectively reduced, and the operation of the engine is.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.
Claims (8)
1. The utility model provides a dysmorphism hole honing cylinder jacket, includes the cylinder jacket body, the cylinder jacket body is equipped with the hole, and the one end of cylinder jacket body is the main aspects, and the other end is the tip, the excircle diameter of main aspects is greater than the excircle diameter of tip, its characterized in that: the shape of the inner hole is processed into sections with different shapes according to the difference of actual temperatures of different sections of the cylinder sleeve at working temperature, so that the inner hole of the cylinder sleeve is integrally in a straight cylinder shape under the working condition, wherein the section corresponding to the large end is in the straight cylinder shape, the shapes of the rest sections are in the cone cylinder shape or the arc cylinder shape, the sections are in smooth transition connection, the inner aperture of the large end is smaller than that of the small end, the inner aperture of the straight cylinder section is smaller than the minimum inner aperture of the other sections, and the inner apertures of the other sections are gradually increased from the large end to the small end of the cylinder sleeve.
2. The contoured bore honing cylinder liner of claim 1, wherein: the inner hole of the cylinder sleeve comprises two sections, the section corresponding to the small end is a conical cylindrical section, and the minimum inner aperture of the conical cylindrical section is larger than or equal to the inner aperture of the straight cylindrical section.
3. The contoured bore honing cylinder liner of claim 1, wherein: the inner hole of the cylinder sleeve comprises three sections, the section corresponding to the small end is a first conical cylindrical section, the section between the large end and the small end is a second conical cylindrical section, the minimum inner aperture of the second conical cylindrical section is larger than or equal to the inner aperture of the straight cylindrical section, and the maximum inner aperture of the second conical cylindrical section is smaller than or equal to the minimum inner aperture of the first conical cylindrical section.
4. The contoured bore honing cylinder liner of claim 1, wherein: when the inner hole of the cylinder sleeve is provided with a conical section, the taper of the conical section is 20-100 μm.
5. The contoured bore honing cylinder liner of claim 1, wherein: the material of the cylinder sleeve body adopts pearlite cast iron, bainite cast iron, carbon steel 45#, carbon steel 50# or carbon steel 20 #.
6. The preparation method of the special-shaped inner hole honing cylinder sleeve according to any one of claims 1 to 5, characterized by comprising the following steps:
61) cylinder liner blank: preparing a cylinder sleeve casting or a formed steel pipe by adopting a wet coating centrifugal casting process;
62) machining: cutting and primary honing are carried out on a cylinder sleeve blank, and the specific process flow comprises rough turning, rough boring of an inner hole, turning, fine boring of the inner hole, semi-fine turning of an excircle, rough grinding of the inner hole, fine turning of the excircle and semi-fine grinding;
63) fine grinding: selecting abrasive strips according to reticulate pattern parameters of an inner hole of a cylinder sleeve, inputting honing parameters in numerical control honing equipment, and carrying out fine honing processing on the inner hole wall of the cylinder sleeve obtained in the step 62) by using the numerical control honing equipment, wherein the honing parameters comprise upper and lower reversing points of a grinding head, and honing times, stepping speeds and honing pressures corresponding to different sections of the inner hole, which are adjusted according to the shapes of the different sections of the inner hole, and the fine grinding step comprises the following steps:
631) selecting a corresponding honing emery stick, bonding the honing emery stick to the emery stick plate, assembling into a honing head, and installing the honing head on numerical control honing equipment, wherein the honing head adopts a short honing head, the length of the honing head is 100mm, and the length of the emery stick plate is 60 mm;
632) setting honing parameters of different sections of the inner bore of the cylinder sleeve in the numerical control honing equipment, wherein the honing parameters of the sections are mainly distinguished as different distances of reversing points and different corresponding honing times; the reversing point distance and the honing times are determined according to the specification of the abrasive bars, the bore taper of each section of the cylinder sleeve and the length of each section of the cylinder sleeve, the honing times are equal to the bore taper of the cylinder sleeve/the honing amount of each section of the abrasive bars, and the reversing point distance is equal to the length of each section of the cylinder sleeve/the honing times;
633) the numerical control honing equipment carries out fine honing processing on the hole wall of the inner hole of the cylinder sleeve according to the set honing parameters, and the inner hole is continuously honed at different positions through one-step forming, so that the hole wall of the inner hole presents a designed shape.
7. The method for preparing the special-shaped inner bore honing cylinder liner according to claim 6, wherein the cylinder liner is made of pearlitic cast iron, and the method for calculating the inner bore taper of the cylinder liner comprises the following steps:
71) determining the linear expansion coefficient K of the cylinder liner material, wherein K is a constant, and the linear expansion coefficient K of the pearlite cast iron at the working temperature of 50-200 ℃ is 11.66 × 10-3；
72) Determining the temperature variation delta E of the cylinder sleeve in the working state and the non-working state, wherein the delta E is the temperature of the cylinder sleeve in the working state-the temperature of the cylinder sleeve in the non-working state;
73) and calculating the inner bore taper X of the cylinder sleeve, and obtaining the inner bore taper X of the cylinder sleeve according to a taper calculation formula X ═ Delta E multiplied by phi D multiplied by K, wherein phi D is the inner bore diameter of the cylinder sleeve.
8. The method for preparing the profiled bore honing cylinder liner according to claim 6 or 7, wherein the honing pressure is calculated by:
81) determining the honing pressure P: p ═ Rvk × c, where c is the honing coefficient, and c is taken to be 0.01 empirically; rvk is the average groove depth of the reticulate pattern of the inner hole of the cylinder sleeve;
82) determining the contact area S of the sand bars and the inner hole of the cylinder sleeve, wherein the S is L multiplied by D multiplied by N, the L is the length of the sand bars, the D is the width of the sand bars, the N is the number of the sand bars on the honing head, and the N is 6 according to experience;
83) calculating the honing pressure F: and F is P multiplied by S, wherein S is the contact area of the sand strip and the inner bore of the cylinder sleeve.
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| CN202010461806.6A CN111594336A (en) | 2020-05-27 | 2020-05-27 | Special-shaped inner hole honing cylinder sleeve and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115042083A (en) * | 2022-06-06 | 2022-09-13 | 华南理工大学 | Intelligent honing control implementation method for conical cylinder hole |
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| WO2016131736A1 (en) * | 2015-02-20 | 2016-08-25 | Elgan-Diamantwerkzeuge Gmbh & Co. Kg | Honing method for form honing |
| DE102015209609A1 (en) * | 2015-05-26 | 2016-12-01 | Gehring Technologies Gmbh | Method for producing rotationally symmetrical, non-cylindrical bores with a honing tool |
| US20170129070A1 (en) * | 2015-11-05 | 2017-05-11 | Gehring Technologies Gmbh | Method and Device for Producing Non-Cylindrical Bores with at Least One Recess by Honing |
| CN108747798A (en) * | 2018-05-29 | 2018-11-06 | 中原内配集团股份有限公司 | A kind of differentiation honing cylinder jacket and preparation method thereof |
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2020
- 2020-05-27 CN CN202010461806.6A patent/CN111594336A/en active Pending
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| US5177904A (en) * | 1988-10-15 | 1993-01-12 | Nagel Maschinen-Und Werkzeugfabrik Gmbh | Method for honing workpieces |
| WO2016131736A1 (en) * | 2015-02-20 | 2016-08-25 | Elgan-Diamantwerkzeuge Gmbh & Co. Kg | Honing method for form honing |
| DE102015209609A1 (en) * | 2015-05-26 | 2016-12-01 | Gehring Technologies Gmbh | Method for producing rotationally symmetrical, non-cylindrical bores with a honing tool |
| US20170129070A1 (en) * | 2015-11-05 | 2017-05-11 | Gehring Technologies Gmbh | Method and Device for Producing Non-Cylindrical Bores with at Least One Recess by Honing |
| CN108747798A (en) * | 2018-05-29 | 2018-11-06 | 中原内配集团股份有限公司 | A kind of differentiation honing cylinder jacket and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115042083A (en) * | 2022-06-06 | 2022-09-13 | 华南理工大学 | Intelligent honing control implementation method for conical cylinder hole |
| CN115042083B (en) * | 2022-06-06 | 2023-06-20 | 华南理工大学 | Intelligent honing control implementation method for conical cylinder hole |
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