CN112959204A - Honing material special for automobile engine cylinder inner hole reticulate pattern and processing technology - Google Patents
Honing material special for automobile engine cylinder inner hole reticulate pattern and processing technology Download PDFInfo
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- CN112959204A CN112959204A CN202110254989.9A CN202110254989A CN112959204A CN 112959204 A CN112959204 A CN 112959204A CN 202110254989 A CN202110254989 A CN 202110254989A CN 112959204 A CN112959204 A CN 112959204A
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- 239000000463 material Substances 0.000 title claims abstract description 44
- 238000005516 engineering process Methods 0.000 title abstract description 10
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 19
- 239000010432 diamond Substances 0.000 claims abstract description 19
- 239000007767 bonding agent Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 19
- 230000001154 acute effect Effects 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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Classifications
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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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- 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
- B24B33/08—Honing tools
Abstract
The invention discloses a special honing material for reticulate patterns of an inner hole of an automobile engine cylinder and a processing technology thereof, wherein the honing material is used for carrying out rough honing and fine honing on the inner hole of a workpiece to be processed so as to generate a surface with required cross textures, and the workpiece to be processed is the automobile engine cylinder; when the inner bore of the engine cylinder is subjected to rough honing processing, the needed honing processing material is artificial diamond, the granularity is 230/300, the concentration range is 160-180, the hardness range is 60-80, and the bonding agent is M; when the inner bore of the engine cylinder is subjected to fine honing, the required honing material is artificial diamond, the granularity is W10, the concentration range is 80-100, the hardness range is 40-60, and the bonding agent is M. By the honing material and the processing technology provided by the invention, the textured surface with required parameters is obtained by processing the inner hole of the cylinder, the working efficiency and the service life of the cylinder are improved, and the assembly and the use performance of an engine are improved.
Description
Technical Field
The invention relates to the field of processing of automobile engine cylinders, in particular to a special honing material for reticulate patterns of inner holes of automobile engine cylinders and a processing technology thereof.
Background
The cylinder of the automobile engine is a heart part of the engine, and the inner surface of the cylinder, the top of the piston, the piston ring and the bottom surface of the cylinder cover form a combustion chamber of the engine and guide the reciprocating linear motion of the piston. The inner surface of the cylinder is an assembly surface and a working surface, and the quality of the machining quality directly influences the assembly performance and the service performance of the engine, so that the selection of a proper inner surface machining technology of the cylinder has important significance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a special honing material for the reticulate pattern of an inner hole of an automobile engine cylinder and a processing technology thereof, and the technical scheme is as follows:
on one hand, the invention provides a special honing material for reticulate patterns of an inner hole of an automobile engine cylinder, the honing material is used for carrying out rough honing processing and fine honing processing on the inner hole of a workpiece to be machined, a required cross texture surface is generated on the inner hole wall after the processing, the workpiece to be machined is the automobile engine cylinder, the material of the workpiece to be machined is HT200, and the hardness of the workpiece to be machined is HBW 150-255;
when the inner hole of the cylinder of the automobile engine is subjected to rough honing processing, the required honing processing material is rough honing oilstone which is made of artificial diamond, the granularity is 230/300, the concentration range is 160-180, the hardness range is 60-80, and the bonding agent is M;
and carrying out fine honing processing on the inner hole of the automobile engine cylinder after the rough honing processing, wherein the required honing processing material is a fine honing oilstone which is made of artificial diamond, the granularity of the artificial diamond is W10, the concentration range of the artificial diamond is 80-100, the hardness range of the artificial diamond is 40-60, and the bonding agent is M.
Further, a coarse reticulated pattern is obtained after the inner bore of the cylinder of the automobile engine is subjected to coarse honing processing, and the coarse reticulated pattern meets the following technical requirements: ra＝1.5-1.8μm，R3z＝8-10μm，tp2＝20％±10％，tp440% ± 5%, and the cross hatch angle is 50 ° ± 10 °;
and (3) carrying out fine honing processing on the inner hole of the automobile engine cylinder after the rough honing processing to obtain a fine mesh, wherein the fine mesh meets the following technical requirements: ra＝1.1-1.5μm，R3z＝5-7μm，tp2＝45％±10％，tp480% +/-5% cross netThe grain angle is 50 ° ± 10 °,
wherein R isa: arithmetic mean deviation of contour, R3z: vertical distance between profile peak of 3 rd high and profile valley of 3 rd high within one sampling length lr on profile, tp2: contour support ratio tp at 2 μm below the reference with the contour support ratio at 5%4: the profile support ratio at 4 μm below the reference, with the profile support ratio at 5%, the cross-hatch angle: the cross-hatching forms an acute angle.
Further, the rough honing oilstone and the fine honing oilstone are both of cuboid structures.
On the other hand, the invention also provides a honing process for the reticulate pattern of the inner hole of the automobile engine cylinder, which adopts the special honing material for the reticulate pattern of the inner hole of the automobile engine cylinder, and the honing process comprises the following steps:
s1, press-fitting the aligned and calibrated automobile engine cylinder on a tool;
s2, sequentially carrying out rough honing processing and fine honing processing on the automobile engine cylinder by using a honing machine to obtain a cross texture surface meeting the technical requirement, wherein the honing machine is provided with honing processing materials;
the rough honing processing steps are as follows: the required honing material is a rough honing oilstone, the rough honing oilstone is arranged on a main shaft of a honing machine, the inner hole of an automobile engine cylinder is subjected to rough honing processing, a rough net grain is obtained on the inner hole wall, and the rough honing processing parameters are as follows: the rotating speed range of the main shaft of the honing machine is 180-;
the fine honing processing steps are as follows: the required honing material is a fine honing oilstone, the fine honing oilstone is arranged on a main shaft of a honing machine, the inner hole wall of the automobile engine cylinder after rough honing is subjected to fine honing, fine reticulate patterns are obtained on the inner hole wall, and the fine honing parameters are as follows: the rotating speed range of the main shaft is 180-200r/min, the reciprocating speed range is 120-150mm/s, and the removing allowance of the fine honing is 4-6 um.
Further, in step S2The coarse reticulate pattern obtained by performing coarse honing on the inner hole of the automobile engine cylinder meets the following technical requirements: ra＝1.5-1.8μm，R3z＝8-10μm，tp2＝20％±10％，tp440% ± 5%, and the cross hatch angle θ is 50 ° ± 10 °;
the fine mesh obtained by carrying out fine honing on the inner hole of the automobile engine cylinder after the rough honing meets the following technical requirements: ra＝1.1-1.5μm，R3z＝5-7μm，tp2＝45％±10％，tp480% + -5%, cross hatch angle 50 deg. + -10 deg.,
wherein R isa: arithmetic mean deviation of contour, R3z: vertical distance between profile peak of 3 rd high and profile valley of 3 rd high within one sampling length lr on profile, tp2: the contour support ratio at a position of 2 μm below the reference, tp, is set at a position of 5% of the contour support ratio4: the profile support ratio at 4 μm, the cross-hatch angle, was referenced at 5% of the profile support ratio: the cross-hatching forms an acute angle.
Further, the cross-hatch angle θ is given by the following equation:
wherein: l-stroke length (mm), S-reciprocating times (times/min), D-main shaft rotating speed (r/min), n-diameter (mm), wherein n is the maximum diameter of the whole rotation, namely the maximum diameter of the honing device extending into the inner hole of the cylinder.
Further, in step S2, the honing machine is operated to perform honing process on the inner bore of the cylinder of the automobile engine, and honing cooling liquid is adopted for cooling.
The technical scheme provided by the invention has the following beneficial effects:
the invention provides a special honing material for reticulate patterns of an inner hole of an automobile engine cylinder and a processing technology thereof, wherein specific artificial diamond is adopted for rough honing and specific fine honing oilstone is adopted for fine honing, so that the processed material is processedThe reticulate pattern on the surface of the inner hole of the cylinder of the automobile engine can meet the following technical requirements: ra＝1.1-1.5μm，R3z＝5-7μm，tp2＝45％±10％，tp4The assembling performance and the service performance of the engine can be improved, particularly, the automobile engine cylinder is smoothly matched with a piston or a piston rod, so that the assembling is convenient, the service performance is improved, and the working efficiency of the cylinder is improved; the lubricating oil film can be uniformly adhered to the surface of the inner hole of the automobile engine cylinder and can be maintained for a long time, the sealing performance of the automobile engine cylinder in matching with a piston or a piston rod is improved, the lubricating function is improved, and the service life of the automobile engine cylinder is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cylinder bore reticulation of an automobile engine provided by an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
In one embodiment of the invention, the special honing material for the reticulate pattern of the cylinder bore of the automobile engine is provided, the honing material is used for carrying out rough honing processing and fine honing processing on the bore of a workpiece to be machined, a required cross texture surface is generated on the bore wall after the rough honing processing and the fine honing processing are carried out, and the workpiece to be machined is the cylinder bore of the automobile engine, is made of HT200(HT represents gray cast iron) and has the hardness of HBW 150-255.
The inner bore of the cylinder of the automobile engine is subjected to rough honing processing, and then the inner bore of the cylinder of the automobile engine is subjected to fine honing processing. When the inner bore of the cylinder of the automobile engine is subjected to rough honing processing, the required honing processing material is rough honing oilstone which is made of artificial diamond, the granularity is 230/300, the concentration range is 160-180, the hardness range is 60-80, and the bonding agent is M.
And carrying out fine honing on the inner hole of the automobile engine cylinder after the rough honing, wherein the honing material is fine honing oilstone which is made of artificial diamond, the granularity of the artificial diamond is W10, the concentration range of the artificial diamond is 80-100, the hardness range of the artificial diamond is 40-60, and the bonding agent is M.
Further, a coarse reticulated pattern is obtained after the inner bore of the cylinder of the automobile engine is subjected to coarse honing processing, and the coarse reticulated pattern meets the following technical requirements: ra＝1.5-1.8μm，R3z＝8-10μm，tp2＝20％±10％，tp440% ± 5%, and the cross hatch angle is 50 ° ± 10 °;
and (3) carrying out fine honing processing on the inner hole of the automobile engine cylinder after the rough honing processing to obtain a fine mesh, wherein the fine mesh meets the following technical requirements: ra＝1.1-1.5μm，R3z＝5-7μm，tp2＝45％±10％，tp480% ± 5%, and the cross hatch angle 50 ° ± 10 °.
Wherein R isa: arithmetic mean deviation of contour, R3z: vertical distance between profile peak of 3 rd high and profile valley of 3 rd high within one sampling length lr on profile, tp2: contour support ratio tp at 2 μm below the reference with the contour support ratio at 5%4: the profile support ratio at 4 μm below the reference, with the profile support ratio at 5%, the cross-hatch angle: the cross-hatching forms an acute angle.
Preferably, the rough honing oilstone and the fine honing oilstone are both of cuboid structures.
The invention also provides a honing process for the reticulate pattern of the inner hole of the automobile engine cylinder, which adopts the special honing material for the reticulate pattern of the inner hole of the automobile engine cylinder and comprises the following steps:
s1, firstly, installing the tool on the honing machine, and then pressing the aligned and calibrated automobile engine cylinder on the tool;
s2, sequentially carrying out rough honing processing and fine honing processing on the automobile engine cylinder by using a honing machine to uniformly process deep grooves and small platforms and generate cross texture surfaces meeting technical requirements, wherein the honing machine is provided with honing processing materials;
the rough honing processing steps are as follows: the required honing material is rough honing oilstone, the rough honing oilstone is taken and installed on a main shaft of a honing machine, rough honing processing is carried out on an inner hole of an automobile engine cylinder, rough reticulate patterns are obtained on the inner hole wall, and the rough honing processing parameters are as follows: the rotating speed range of the main shaft of the honing machine is 180-;
the fine honing processing steps are as follows: the required honing material is a fine honing oilstone, the fine honing oilstone is taken and installed on a main shaft of a honing machine, coarse reticulate patterns on the inner hole wall of an automobile engine cylinder after coarse honing processing are subjected to fine honing processing, fine reticulate patterns are obtained on the inner hole wall, and the fine honing processing parameters are as follows: the rotating speed range of the main shaft is 180-200r/min, the reciprocating speed range is 120-150mm/s, and the removing allowance of the fine honing is 4-6 um.
In step S2, the rough cross-hatched pattern obtained by rough honing of the inner bore of the cylinder of the automobile engine meets the following technical requirements: ra＝1.5-1.8μm，R3z＝8-10μm，tp2＝20％±10％，tp440% ± 5%, and the cross hatch angle θ is 50 ° ± 10 °;
the fine mesh obtained by carrying out fine honing on the inner hole of the automobile engine cylinder after the rough honing meets the following technical requirements: ra＝1.1-1.5μm，R3z＝5-7μm，tp2＝45％±10％，tp480% + -5%, the cross hatch angle theta is 50 deg. + -10 deg.,
wherein R isa: arithmetic mean deviation of contour, R3z: vertical distance between profile peak of 3 rd high and profile valley of 3 rd high within one sampling length lr on profile, tp2: the contour support ratio at a position of 2 μm below the reference, tp, is set at a position of 5% of the contour support ratio4: the profile support ratio at 4 μm, the cross-hatch angle, was referenced at 5% of the profile support ratio: the acute angle formed by the crosshatch, see fig. 1. RaAre common parameters for evaluating roughness.
In the honing process, the radial rotation and the axial reciprocating motion of a honing rod of the honing machine or the radial rotation of the honing rod and the axial reciprocating motion of a workpiece form cross reticulate patterns on the processing surface of the inner bore of the cylinder of the automobile engine.
The cross-hatch angle θ is given by the following equation:
wherein: l-stroke length (mm), S-reciprocating times (times/min), D-main shaft rotating speed (r/min), n-diameter (mm), wherein n is the maximum diameter of the whole rotation, namely the maximum diameter of the honing part extending into the inner hole of the cylinder of the automobile engine.
In the rough honing process and the fine honing process, honing materials are selected according to the material and the hardness of a processing object, and the processing effects on the inner hole meshes are greatly different due to different parameters such as granularity, concentration, hardness and the like of the honing materials.
In step S2, the honing machine is operated to perform honing process on the inner bore of the cylinder of the automobile engine, and honing coolant is used for cooling.
According to the special honing material and the processing technology for the reticulate pattern of the inner hole of the automobile engine cylinder, provided by the invention, the specific artificial diamond is adopted for rough honing and the specific fine honing oilstone is adopted for fine honing, so that the processed reticulate pattern on the surface of the inner hole of the automobile engine cylinder can meet the following technical requirements: ra＝1.1-1.5μm，R3z＝5-7μm，tp2＝45％±10％，tp4The assembling performance and the service performance of the engine can be improved, particularly, the automobile engine cylinder is smoothly matched with a piston or a piston rod, so that the assembling is convenient, the service performance is improved, and the working efficiency of the cylinder is improved; the lubricating oil film can be uniformly adhered to the surface of the inner hole of the automobile engine cylinder and can be maintained for a long time, the sealing performance of the automobile engine cylinder in matching with a piston or a piston rod is improved, the lubricating function is improved, and the service life of the automobile engine cylinder is prolonged.
The honing material special for the reticulate patterns of the inner hole of the automobile engine cylinder and the processing technology thereof can remove larger processing allowance, and can improve the size, the geometric precision and the surface roughness of the inner hole of the automobile engine cylinder to obtain the fine reticulate patterns meeting the technical requirements; the surface of the inner hole of the automobile engine cylinder cannot be thermally damaged and deteriorated, and the integrity of the machined surface of the inner hole of the automobile engine cylinder is better.
The honing machine adopted in the application is an MB42100-Z-2 vertical honing machine produced by Suzhou Xin energy precision machinery Limited company.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The special honing material for the reticulate patterns of the inner hole of the cylinder of the automobile engine is characterized in that the honing material is used for carrying out rough honing processing and fine honing processing on the inner hole of a workpiece to be machined so as to generate a surface with required cross textures on the inner hole wall, the workpiece to be machined is the cylinder of the automobile engine, the material of the workpiece to be machined is HT200, and the hardness of the workpiece to be machined is HBW 150-255;
when the inner hole of the cylinder of the automobile engine is subjected to rough honing processing, the required honing processing material is rough honing oilstone which is made of artificial diamond, the granularity is 230/300, the concentration range is 160-180, the hardness range is 60-80, and the bonding agent is M;
and carrying out fine honing processing on the inner hole of the automobile engine cylinder after the rough honing processing, wherein the required honing processing material is a fine honing oilstone which is made of artificial diamond, the granularity of the artificial diamond is W10, the concentration range of the artificial diamond is 80-100, the hardness range of the artificial diamond is 40-60, and the bonding agent is M.
2. The honing material special for the reticulate pattern of the inner bore of the cylinder of the automobile engine as claimed in claim 1, wherein: the method comprises the following steps of carrying out rough honing processing on an inner hole of an automobile engine cylinder to obtain a rough reticulate pattern, wherein the rough reticulate pattern meets the following technical requirements: ra＝1.5-1.8μm，R3z＝8-10μm，tp2＝20％±10％，tp440% ± 5%, and the cross hatch angle is 50 ° ± 10 °;
and (3) carrying out fine honing processing on the inner hole of the automobile engine cylinder after the rough honing processing to obtain a fine mesh, wherein the fine mesh meets the following technical requirements: ra＝1.1-1.5μm，R3z＝5-7μm，tp2＝45％±10％，tp480% + -5%, cross hatch angle 50 deg. + -10 deg.,
wherein R isa: arithmetic mean deviation of contour, R3z: vertical distance between profile peak of 3 rd high and profile valley of 3 rd high within one sampling length lr on profile, tp2: at a contour support ratio of 5%For the base, the profile support ratio at 2 μm below the base, tp4: the cross-hatch angle θ was set at 4 μm below the reference with the contour support ratio of 5%: the cross-hatching forms an acute angle.
3. The honing material special for the reticulation of the inner bore of the cylinder of the automobile engine as claimed in claim 1, wherein the rough honing oilstone and the fine honing oilstone are both of cuboid structures.
4. A honing process for the reticulate pattern of the inner bore of the cylinder of the automobile engine, which adopts the special honing material for the reticulate pattern of the inner bore of the cylinder of the automobile engine as claimed in any one of claims 1-3, and is characterized by comprising the following steps:
s1, press-fitting the aligned and calibrated automobile engine cylinder on a tool;
s2, sequentially carrying out rough honing processing and fine honing processing on the automobile engine cylinder by using a honing machine to obtain a cross texture surface meeting the technical requirement, wherein the honing machine is provided with honing processing materials;
the rough honing processing steps are as follows: the required honing material is a rough honing oilstone, after the rough honing oilstone is arranged on a main shaft of a honing machine, rough honing processing is carried out on an inner hole of a cylinder of an automobile engine, a rough net grain is obtained on the wall of the inner hole, and the rough honing processing parameters are as follows: the rotating speed range of the main shaft of the honing machine is 180-;
the fine honing processing steps are as follows: the required honing material is a fine honing oilstone, the fine honing oilstone is arranged on a main shaft of a honing machine, the inner hole wall of the automobile engine cylinder after rough honing is subjected to fine honing, fine reticulate patterns are obtained on the inner hole wall, and the fine honing parameters are as follows: the rotating speed range of the main shaft is 180-200r/min, the reciprocating speed range is 120-150mm/s, and the removing allowance of the fine honing is 4-6 um.
5. The automotive engine in-cylinder mesh of claim 4The honing process of the patterns is characterized in that: in step S2, the rough cross-hatched pattern obtained by rough honing of the inner bore of the cylinder of the automobile engine meets the following technical requirements: ra＝1.5-1.8μm，R3z＝8-10μm，tp2＝20％±10％，tp440% ± 5%, and the cross hatch angle is 50 ° ± 10 °;
the fine mesh obtained by carrying out fine honing on the inner hole of the automobile engine cylinder after the rough honing meets the following technical requirements: ra＝1.1-1.5μm，R3z＝5-7μm，tp2＝45％±10％，tp480% + -5%, the cross hatch angle theta is 50 deg. + -10 deg.,
wherein R isa: arithmetic mean deviation of contour, R3z: vertical distance between profile peak of 3 rd high and profile valley of 3 rd high within one sampling length lr on profile, tp2: the contour support ratio at a position of 2 μm below the reference, tp, is set at a position of 5% of the contour support ratio4: the profile support ratio at 4 μm, the cross-hatch angle θ, was set as follows, based on the profile support ratio at 5%: the cross-hatching forms an acute angle.
6. The honing process of the reticulate pattern of the inner bore of the cylinder of the automobile engine as claimed in claim 4, wherein: the cross-hatch angle θ is given by the following equation:
wherein: l-stroke length (mm), S-reciprocating times (times/min), D-main shaft rotating speed (r/min), n-diameter (mm).
7. The honing process of the reticulate pattern of the inner bore of the cylinder of the automobile engine as claimed in claim 4, wherein: in step S2, the honing machine is operated to perform honing process on the inner bore of the cylinder of the automobile engine, and honing coolant is used for cooling.
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