CN111271184A - Engine cylinder block cylinder hole wall structure and technological method - Google Patents
Engine cylinder block cylinder hole wall structure and technological method Download PDFInfo
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- CN111271184A CN111271184A CN202010253351.9A CN202010253351A CN111271184A CN 111271184 A CN111271184 A CN 111271184A CN 202010253351 A CN202010253351 A CN 202010253351A CN 111271184 A CN111271184 A CN 111271184A
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- cylinder
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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
- F02F1/18—Other cylinders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention relates to a cylinder hole wall structure of an engine cylinder block and a process method. The alcohol fuel has strong corrosion to the hole wall of the cylinder hole of the engine cylinder block, so that the service life of the engine cylinder block is greatly shortened. The matching clearance between the piston and the piston is enlarged, and the air tightness is reduced, so that the output power of the engine is reduced. An engine cylinder block cylinder bore wall structure comprising: the engine cylinder body (1) is provided with a cylinder hole (2), and the wall of the cylinder hole is subjected to vacuum plating, spraying or coating of an anticorrosive material to form an anticorrosive coating or coating (3), wherein the engine cylinder is single-cylinder or multi-cylinder, the number of cylinders is not limited, and the engine cylinder can be classified into a cast iron cylinder body, an aluminum cylinder body and other alloy material cylinder bodies. The invention is applied to the engine cylinder.
Description
The technical field is as follows:
the invention relates to a cylinder hole wall structure of an engine cylinder block and a process method.
Background art:
at present, gasoline or diesel oil resources are increasingly in shortage, the environmental pollution caused by the emission of automobile exhaust taking gasoline or diesel oil as fuel is increasingly serious, and energy conservation and environmental protection become necessary trends for the development of the automobile industry. Realizing energy conservation and emission reduction of automobiles is a major challenge faced by the whole automobile industry, so that the design of engines develops towards using alternative fuels or blending other fuels into gasoline so as to achieve the aim of reducing emission, and engines with pure alcohol fuels or alcohol fuels blended into gasoline appear. Alcohol fuels have a strong corrosion on the cylinder bore wall of an engine cylinder block, and corrosion prevention of the cylinder bore wall of the engine cylinder block has become one of important research subjects. The invention provides a cylinder hole wall structure of an engine cylinder block.
The prior art has the following defects:
(1) the alcohol fuel has strong corrosivity, causes corrosion to the hole wall of the cylinder hole of the engine cylinder block, and greatly shortens the service life of the cylinder block.
(2) After the hole wall of the cylinder hole of the cylinder body is corroded, the fit clearance between the cylinder body and the piston is enlarged, and the air tightness is reduced, so that the output power of an engine is reduced;
(3) after the hole wall of the cylinder hole of the cylinder body is corroded, the fit clearance between the cylinder body and the piston is enlarged, the air tightness is reduced, and the fuel consumption rate is increased;
(4) after the hole wall of the cylinder hole of the cylinder body is corroded, the fit clearance between the cylinder body and the piston is enlarged, the air tightness is reduced, and the exhaust emission index is increased;
(5) after the hole wall of the cylinder hole of the cylinder body is corroded, the fit clearance between the cylinder hole and the piston is enlarged, so that fuel enters a crankcase along the clearance, the fuel and engine oil are mixed, the quality of the engine oil is lowered, the lubricating effect is reduced, the service life of the engine oil is shortened, and insufficient lubrication can be caused due to untimely replacement of the engine oil.
The invention content is as follows:
the invention aims to provide a cylinder hole wall structure of an engine cylinder block and a process method.
The above purpose is realized by the following technical scheme:
an engine cylinder block comprising: the engine cylinder block is provided with a cylinder hole, and an anti-corrosion coating or coating is arranged on the wall of the cylinder hole, wherein the engine cylinder is a single cylinder or multiple cylinders, and is a cast iron cylinder block, an aluminum cylinder block or an alloy cylinder block.
When the aluminum cylinder body is adopted, the cast iron cylinder sleeve needs to be embedded in the wall of the cylinder hole, and the wall of the cylinder hole of the cylinder body in which the cylinder sleeve is embedded is provided with an anti-corrosion coating or coating.
The cylinder hole wall structure of the engine cylinder body is characterized in that an anti-corrosion coating or coating on the cylinder hole wall and an anti-corrosion coating or coating of a cylinder body cylinder hole of the cylinder sleeve are formed by vacuum plating, spraying or coating of an anti-corrosion material.
The process method of the engine cylinder block cylinder hole wall structure comprises the following steps:
the engine cylinder block cylinder hole anticorrosive coating process comprises the following steps:
(1) feeding cast blanks OP10 such as cast iron or cylinder bodies which are not embedded with cylinder liners or are embedded with the cylinder liners;
(2) cutting operations OP 20-OP 290, comprising: cutting the upper, lower, front and rear 4 end faces of a cylinder body, an oil pump mounting face, an oil drilling channel, roughing, finely boring a main bearing hole, milling a groove of the bearing hole, roughing, finely boring a water pump hole, lug end faces and drill holes on the left and right end faces of the cylinder body, reaming, tapping and roughing, finely boring a bowl-shaped plug hole and a bowl-shaped plug, gluing and mounting, chip removal cleaning, side leakage and detection (size detection and air tightness detection);
(3) cylinder bore machining operation-heavy boring OP 300;
(4) cylinder bore machining operation-fine boring OP 310;
(5) cylinder bore machining operation-honing OP 320;
(6) the cylinder bore is vacuum coated with the anti-corrosive material OP330 using a vacuum coating apparatus or process technique, such as magnetron sputtering, using magnetron sputtering techniques, but not limited thereto.
The engine cylinder block cylinder hole anticorrosive coating process comprises the following steps:
(1) feeding cast blanks OP10 such as cast iron or cylinder bodies which are not embedded with cylinder liners or are embedded with the cylinder liners;
(2) cutting operations OP 20-OP 290, comprising: cutting the upper, lower, front and rear 4 end faces of a cylinder body, an oil pump mounting face, an oil drilling channel, roughing, finely boring a main bearing hole, milling a groove of the bearing hole, roughing, finely boring a water pump hole, lug end faces and drill holes on the left and right end faces of the cylinder body, reaming, tapping and roughing, finely boring a bowl-shaped plug hole and a bowl-shaped plug, gluing and mounting, chip removal cleaning, side leakage and detection (size detection and air tightness detection);
(3) cylinder bore machining operation-heavy boring OP 300;
(4) cylinder bore machining roughens or textures OP310, roughening or texturing the bore wall of the cylinder bore. The roughening or reticulation is carried out on the surface of the hole wall, so that the bonding strength of the coating or the coating of the anticorrosive material can be improved, and the roughening process adopts a mechanical roughening process: other roughening processes may include chemical or plasma etching, sparking, electrical discharge using tools with cutting edges, sand blasting or water jets, and the steps may be omitted if the corresponding requirements are met in step three.
(5) OP320 for preventing over-spray at the cylinder part outside the cylinder hole;
(6) the cylinder hole is sprayed or coated with the anticorrosive material OP330, and the device for spraying or coating the anticorrosive material is a thermal spraying device and can also adopt plasma spraying, explosion spraying, electric arc spraying, vapor deposition or chemical or electrochemical technology;
(7) cylinder bore machining operation-removing the cylinder block portion covering material OP340 other than the cylinder bore;
(8) cylinder bore machining operation-fine boring OP 350;
(9) cylinder bore machining operation-honing OP 360.
The invention has the beneficial effects that:
1. after the hole wall of the cylinder hole of the cylinder block is treated by an anti-corrosion coating or a coating, the anti-corrosion property and the wear resistance of the surface of the cylinder hole are enhanced, and the friction and the wear between the cylinder hole and a piston are reduced, so that the service life of the cylinder block is prolonged;
2. after the cylinder hole wall of the cylinder body is treated by an anti-corrosion coating or a coating, the strength of the cylinder hole surface is enhanced, the heat conduction is improved, the heat and mechanical load is carried to the maximum extent, and the air tightness is improved, so that the output power of an engine is improved;
3. after the hole wall of the cylinder hole of the cylinder body is treated by the anti-corrosion coating or the coating, the fit clearance between the cylinder hole and the piston is kept within the design tolerance range for a long time, so that the consumption rate of fuel oil is reduced;
4. after the hole wall of the cylinder hole of the cylinder body is treated by an anti-corrosion coating or a coating, the emission performance of an engine is improved, and the environmental pollution is reduced;
5. after the hole wall of the cylinder hole of the cylinder body is treated by the anti-corrosion coating or the coating, the problem that the quality of engine oil is lowered due to fuel can be solved, so that the service life of the engine oil is prolonged;
6. the cylinder hole wall anti-corrosion coating or coating treatment of the cylinder body can be used for repairing the cylinder body with serious cylinder hole abrasion and corrosion.
Description of the drawings:
FIG. 1 is a schematic structural diagram of an anti-corrosion coating or coating formed by vacuum plating, spraying or coating an anti-corrosion material on a hole wall of a cylinder sleeve which is not embedded.
FIG. 2 is a schematic structural view of an anti-corrosion coating or coat formed on the wall of a hole embedded with a cylinder sleeve by vacuum plating, spraying or coating an anti-corrosion material.
FIG. 3 is a schematic diagram of the process steps of the present invention for corrosion protection of an engine cylinder bore.
FIG. 4 is a simplified schematic illustration of the process steps for forming the corrosion protective coating for an engine cylinder bore according to the present invention.
An engine cylinder body, 2, a cylinder hole, 3, an anti-corrosion coating or layer, 4 and a cylinder sleeve.
The specific implementation mode is as follows:
example 1:
an engine cylinder block cylinder bore wall structure comprising: the engine cylinder block 1 is provided with a cylinder hole 2, and in the cylinder hole, an anticorrosive coating or coating 3 is formed on the wall of the cylinder hole through vacuum plating, spraying or coating of an anticorrosive material, wherein the engine cylinder is single-cylinder or multi-cylinder, the number of cylinders is not limited, and the engine cylinder can be classified into a cast iron cylinder block, an aluminum cylinder block and other alloy material cylinder blocks.
Example 2:
according to the hole wall structure of the cylinder hole of the engine cylinder block in the embodiment 1, when the aluminum cylinder block is adopted, the cast iron cylinder sleeve 4 needs to be embedded in the hole wall of the cylinder hole, and the hole wall of the cylinder hole of the cylinder block in which the cylinder sleeve is embedded is subjected to vacuum plating, spraying or coating of an anticorrosive material to form an anticorrosive coating or coating.
Example 3:
the cylinder block can be classified into a cast iron cylinder block, an aluminum cylinder block and other alloy cylinder blocks according to the materials, and most of the aluminum cylinder blocks need to embed a cast iron cylinder sleeve in a cylinder hole so that the cylinder hole has high strength, rigidity, wear resistance or other properties. The engine using pure alcohol or gasoline mixed with alcohol as fuel has different corrosion to cast iron cylinder or aluminum cylinder without embedded cylinder sleeve or aluminum cylinder with embedded cylinder sleeve.
Example 4:
the process steps are schematically shown in FIG. 3:
the method comprises the following steps: feeding cast blanks OP10 such as cast iron or cylinder bodies which are not embedded with cylinder liners or are embedded with the cylinder liners;
step two: cutting operations OP 20-OP 290, comprising: cutting the upper, lower, front and rear 4 end faces of a cylinder body, an oil pump mounting face, an oil drilling passage, roughing, finely boring a main bearing hole, milling a groove of the bearing hole, roughing, finely boring a water pump hole, lug end faces and drill holes on the left and right end faces of the cylinder body, reaming, tapping and roughing, finely boring a bowl-shaped plug hole, gluing and mounting a bowl-shaped plug, removing chips, cleaning, side leakage, detecting (dimension detecting and air tightness detecting), and the like;
step three: cylinder bore machining operation-heavy boring OP 300;
step four: cylinder bore machining operation-fine boring OP 310;
step five: cylinder bore machining operation-honing OP 320;
step six: the cylinder bore is vacuum coated with the anti-corrosive material OP330, which may be any type of vacuum coating apparatus or process technology, such as magnetron sputtering technology. Magnetron sputtering techniques may be used but are not limiting.
Example 5:
second embodiment of the anticorrosion coating of the cylinder hole of the engine cylinder block:
the process steps are schematically shown in FIG. 4:
the method comprises the following steps: feeding cast blanks OP10 such as cast iron or cylinder bodies which are not embedded with cylinder liners or are embedded with the cylinder liners;
step two: cutting operations OP 20-OP 290, comprising: cutting the upper, lower, front and rear 4 end faces of a cylinder body, an oil pump mounting face, an oil drilling passage, roughing, finely boring a main bearing hole, milling a groove of the bearing hole, roughing, finely boring a water pump hole, lug end faces and drill holes on the left and right end faces of the cylinder body, reaming, tapping and roughing, finely boring a bowl-shaped plug hole, gluing and mounting a bowl-shaped plug, removing chips, cleaning, side leakage, detecting (dimension detecting and air tightness detecting), and the like;
step three: cylinder bore machining operation-heavy boring OP 300;
step four: cylinder bore machining roughens or textures OP310, roughening or texturing the bore wall of the cylinder bore. Roughening or texturing the surface of the bore wall may improve the adhesion or bond strength of the corrosion protection material coating or layer, and the roughening process may be a mechanical roughening process (e.g., using a tool having a cutting edge, grit blasting, or water jet). Other roughening processes may include (e.g., chemical or plasma) etching, sparking, discharging, or others. If step three can meet the corresponding requirements, the step can be omitted.
Step five: OP320 for preventing over-spray at the cylinder part outside the cylinder hole;
step six: the cylinder bore is sprayed or coated with the anticorrosive material OP330, and the device for spraying or coating the anticorrosive material may be any type of spraying or coating device, such as a thermal spraying device. Thermal spray techniques that may be used, but are not limited, examples include plasma spraying, detonation spraying, electric arc spraying, and the like. Other coating techniques, such as vapor deposition or chemical or electrochemical techniques, may also be used. Any spraying or coating device or process can achieve the purpose of spraying or coating the anticorrosive material, and the device or process belongs to the scope of the invention;
step seven: cylinder bore machining operation-removing the cylinder block portion covering material OP340 other than the cylinder bore;
step eight: cylinder bore machining operation-fine boring OP 350;
step nine: cylinder bore machining operation-honing OP 360;
example 6:
as required, embodiments of the present invention are disclosed herein; it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The schematic drawings 1, 2 are not necessarily drawn to scale; may be expanded or reduced to show clarity in the illustrative features.
Therefore, specific features and structures disclosed herein are not to be interpreted as limiting, but merely as a basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed manner.
Claims (4)
1. An engine cylinder block comprising: an engine cylinder block characterized by: the engine cylinder body is provided with a cylinder hole, and an anti-corrosion coating or coating is arranged on the wall of the cylinder hole, wherein the engine cylinder is a single cylinder or multiple cylinders, and the engine cylinder is a cast iron cylinder body, an aluminum cylinder body or an alloy material cylinder body.
2. The engine cylinder block bore wall structure according to claim 1, characterized in that: when the aluminum cylinder body is adopted, the cast iron cylinder sleeve is required to be embedded in the wall of the cylinder hole, and the wall of the cylinder hole of the cylinder body in which the cylinder sleeve is embedded is provided with an anticorrosive coating or coating.
3. The engine block bore wall structure according to claim 2, characterized in that: the anticorrosive coating or coat on the wall of the cylinder hole and the anticorrosive coating or coat of the cylinder body and the cylinder hole of the cylinder sleeve are formed by vacuum plating, spraying or coating anticorrosive materials.
4. A process for the construction of the bore wall of an engine cylinder block according to any one of claims 1 to 3, characterized in that: the method comprises the following steps:
the engine cylinder block cylinder hole anticorrosive coating process comprises the following steps:
(1) feeding cast blanks OP10 such as cast iron or cylinder bodies which are not embedded with cylinder liners or are embedded with the cylinder liners;
(2) cutting operations OP 20-OP 290, comprising: cutting the upper, lower, front and rear 4 end faces of a cylinder body, an oil pump mounting face, an oil drilling channel, roughing, finely boring a main bearing hole, milling a groove of the bearing hole, roughing, finely boring a water pump hole, lug end faces and drill holes on the left and right end faces of the cylinder body, reaming, tapping and roughing, finely boring a bowl-shaped plug hole and a bowl-shaped plug, gluing and mounting, chip removal cleaning, side leakage and detection (size detection and air tightness detection);
(3) cylinder bore machining operation-heavy boring OP 300;
(4) cylinder bore machining operation-fine boring OP 310;
(5) cylinder bore machining operation-honing OP 320;
(6) the cylinder bore is vacuum coated with the anti-corrosive material OP330 using a vacuum coating apparatus or process technique, such as magnetron sputtering, using magnetron sputtering techniques, but not limited thereto.
The engine cylinder block cylinder hole anticorrosive coating process comprises the following steps:
(1) feeding cast blanks OP10 such as cast iron or cylinder bodies which are not embedded with cylinder liners or are embedded with the cylinder liners;
(2) cutting operations OP 20-OP 290, comprising: cutting the upper, lower, front and rear 4 end faces of a cylinder body, an oil pump mounting face, an oil drilling channel, roughing, finely boring a main bearing hole, milling a groove of the bearing hole, roughing, finely boring a water pump hole, lug end faces and drill holes on the left and right end faces of the cylinder body, reaming, tapping and roughing, finely boring a bowl-shaped plug hole and a bowl-shaped plug, gluing and mounting, chip removal cleaning, side leakage and detection (size detection and air tightness detection);
(3) cylinder bore machining operation-heavy boring OP 300;
(4) cylinder bore machining roughens or textures OP310, roughening or texturing the bore wall of the cylinder bore. The roughening or reticulation is carried out on the surface of the hole wall, so that the bonding strength of the coating or the coating of the anticorrosive material can be improved, and the roughening process adopts a mechanical roughening process: other roughening processes may include chemical or plasma etching, sparking, electrical discharge using tools with cutting edges, sand blasting or water jets, and the steps may be omitted if the corresponding requirements are met in step three.
(5) OP320 for preventing over-spray at the cylinder part outside the cylinder hole;
(6) the cylinder hole is sprayed or coated with the anticorrosive material OP330, and the device for spraying or coating the anticorrosive material is a thermal spraying device and can also adopt plasma spraying, explosion spraying, electric arc spraying, vapor deposition or chemical or electrochemical technology;
(7) cylinder bore machining operation-removing the cylinder block portion covering material OP340 other than the cylinder bore;
(8) cylinder bore machining operation-fine boring OP 350;
(9) cylinder bore machining operation-honing OP 360.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010253351.9A CN111271184A (en) | 2020-04-02 | 2020-04-02 | Engine cylinder block cylinder hole wall structure and technological method |
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| CN202010253351.9A CN111271184A (en) | 2020-04-02 | 2020-04-02 | Engine cylinder block cylinder hole wall structure and technological method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935713A (en) * | 2021-01-28 | 2021-06-11 | 中国第一汽车股份有限公司 | Machining method for machining bowl-shaped plug press-fitting hole of cylinder block |
| CN113118711A (en) * | 2021-04-01 | 2021-07-16 | 浙江南都电源动力股份有限公司 | Abrasive water jet roughening and screen punching method |
| CN115070355A (en) * | 2022-06-27 | 2022-09-20 | 山西柴油机工业有限责任公司 | Avoidance interference processing method for steel-aluminum bimetal surface of diesel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0516030A (en) * | 1991-07-11 | 1993-01-26 | Nissan Motor Co Ltd | Machining method for high silicon aluminum bore surface |
| EP0716158A1 (en) * | 1994-12-09 | 1996-06-12 | Ford Motor Company Limited | Method of making engine blocks with coated cylinder bores |
| CN103649371A (en) * | 2011-07-05 | 2014-03-19 | 马勒国际公司 | Method for producing a cylinder liner surface and cylinder liner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935713A (en) * | 2021-01-28 | 2021-06-11 | 中国第一汽车股份有限公司 | Machining method for machining bowl-shaped plug press-fitting hole of cylinder block |
| CN113118711A (en) * | 2021-04-01 | 2021-07-16 | 浙江南都电源动力股份有限公司 | Abrasive water jet roughening and screen punching method |
| CN115070355A (en) * | 2022-06-27 | 2022-09-20 | 山西柴油机工业有限责任公司 | Avoidance interference processing method for steel-aluminum bimetal surface of diesel engine |
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