CN110666466A - High-precision machining process of crankcase - Google Patents
High-precision machining process of crankcase Download PDFInfo
- Publication number
- CN110666466A CN110666466A CN201911127458.2A CN201911127458A CN110666466A CN 110666466 A CN110666466 A CN 110666466A CN 201911127458 A CN201911127458 A CN 201911127458A CN 110666466 A CN110666466 A CN 110666466A
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- Prior art keywords
- blank
- hole
- honing
- milling
- cylinder
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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 discloses a high-precision machining process of a crankcase, which comprises the steps of drilling, surface milling and inner diameter milling, wherein the drilling comprises the following steps: the through hole is processed at the position where the blank needs to be punched, during the through hole, rough machining and grinding are carried out on the inner wall of the hole, hole expansion is carried out, hole expansion processing is carried out on the hole on the blank after the through hole, the inner diameter of the hole meets the required requirement, surface milling and grinding are carried out, the surface of the blank is milled in an eccentric grinding mode, the precision of the surface of the blank reaches the standard, inner diameter milling and grinding are carried out on the inner wall of the hole after hole expansion, and the inner diameter of the hole can reach the precision requirement.
Description
Technical Field
The invention relates to the field of compressor accessories, in particular to a high-precision machining process of a crankcase.
Background
Generally, a crankcase of an engine is an important component of a power device such as an engine, and the crankcase comprises a crankcase and a cylinder body integrated with the crankcase. The box body is used for mounting the crankshaft and plays an important role in the work of the engine.
The precision of the crankcase has a decisive influence on the performance of the engine, and in the prior art, in order to ensure the precision of the crankcase, a plurality of working procedures are often required, so that the production efficiency of the crankcase is low. In view of the above problems, a solution is proposed as follows.
Disclosure of Invention
The invention aims to provide a high-precision machining process of a crankcase, which has the advantages of efficiently producing the high-precision crankcase and improving the production capacity of the crankcase.
The technical purpose of the invention is realized by the following technical scheme:
the high-precision machining process of the crankcase comprises drilling, surface milling and inner diameter milling, wherein the drilling comprises the following steps:
a: a through hole is processed at the position of the blank needing to be punched, the inner wall of the hole is roughly processed and polished during the through hole,
b: reaming, namely reaming the holes on the blank after the through holes to ensure that the inner diameter of the holes meets the required requirements,
c: surface milling, namely milling the surface of the blank in an eccentric grinding mode to ensure that the precision of the surface of the blank reaches the standard,
d: and (4) inner diameter milling, namely milling and grinding the inner wall of the reamed hole for multiple times to ensure that the inner diameter of the hole can meet the precision requirement.
The via hole includes the steps of:
a: fixing the blank, placing the blank on a fixture of a machine tool, clamping the blank at the gravity center position of the blank by using the fixture, exposing the position to be processed,
b: the cutter on the machine tool punches the axial direction of the blank, the cutter comprises a drill bit and a grinding block, the drill bit rotates at a high speed to punch the blank, the grinding block can grind the punched position of the blank,
c: the cylinder hole through hole uses the cutter on the lathe, drills to the blank, uses the cutter of different specifications to beat the cylinder hole of different diameters on the blank, and the direction in cylinder hole and shaft hole is perpendicular, and the cutter can polish the blank simultaneously when punching.
The reaming comprises the following steps:
a: the cutter on the machine tool is used for reaming the shaft hole, so that the diameter of the shaft hole meets the requirement,
b: the hole of the cylinder is expanded to ensure that the diameter of the cylinder hole meets the requirement,
c: the chamfer sword on the practical lathe carries out the chamfer processing to the one end in jar hole, makes the one end in jar hole form the chamfer.
The surface milling comprises the following steps:
a: the blank after reaming is placed on a clamp of a milling device, the clamp preliminarily fixes the blank, one side of the blank to be processed passes through the clamp and is positioned at the lower side of the clamp, a cylinder is started, an output shaft of the cylinder abuts against the gravity center of the upper end surface of the blank, the blank cannot vibrate, the milling precision of the blank is improved,
b: the milling device adopts an eccentric milling process, adopts a servo motor to drive an eccentric wheel to rotate, and leads the eccentric wheel to mill one side of a blank piece to be processed.
The inner hole milling and grinding method comprises the following steps:
a: honing the shaft hole, placing the blank on a fixture of a honing machine, honing the inner wall of the shaft hole by a main shaft of the honing machine after the honing machine is started, improving the precision of the inner wall of the shaft hole,
b: honing the cylinder holes, honing the cylinder holes by using a honing machine, honing the cylinder holes with different diameters by adopting main shafts with different diameters, so that each cylinder hole can meet the precision requirement,
the main shaft and the clamp of the honing machine both adopt floating structures, and both the main shaft and the clamp can float to a certain extent, so that the side wall of the main shaft can be better attached to the inner wall of a hole, and the honing precision is higher.
During honing, carry out the surface milling to blank earlier and grind, later carry out the shaft hole honing again, after accomplishing the shaft hole honing, can carry out the surface milling to blank once more and grind, carry out the honing to the cylinder hole again at last, at the in-process of carrying out honing and surface milling, have rivers to wash blank, will be down the sweeps that comes down from blank's surface down by the mill, rivers can also cool down the surface of blank.
When the crankcase is produced by adopting the process, a plurality of processes can be integrated on the same machine tool, the through hole and hole expanding operation can be completed on one machine tool, then the surface milling and the inner diameter milling are carried out on the crankcase by the honing machine and the milling device, and the honing machine adopts a floating honing structure, so that the precision of the crankcase can be further improved, and the efficient processing of the crankcase can be realized.
Detailed description of the invention
The following is only a preferred embodiment of the present invention, and the protection scope is not limited to the embodiment, and any technical solution that falls under the idea of the present invention should fall within the protection scope of the present invention. It should also be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention.
The high-precision machining process of the crankcase comprises drilling, surface milling and inner diameter milling, wherein the drilling comprises the following steps:
a: and the through hole is used for processing the through hole at the position where the blank needs to be punched, and during the through hole, the inner wall of the hole is roughly processed and polished. The via hole includes the steps of:
a: fixing the blank, placing the blank on a clamp of a machine tool, clamping the blank at the gravity center position of the blank by using the clamp, and exposing the position needing to be processed.
b: the axial direction of blank is punched to the cutter in shaft hole through-hole, the cutter on the lathe, and the cutter includes drill bit and abrasive brick, and the drill bit rotates at a high speed, punches on the blank, and the abrasive brick can be polished to the position that the blank was punched.
c: the cylinder hole through hole uses the cutter on the lathe, drills to the blank, uses the cutter of different specifications to beat the cylinder hole of different diameters on the blank, and the direction in cylinder hole and shaft hole is perpendicular, and the cutter can polish the blank simultaneously when punching.
B: and (4) reaming, namely reaming the hole on the blank after the through hole to ensure that the inner diameter of the hole meets the required requirement. The reaming comprises the following steps:
a: and (3) reaming the shaft hole by using a cutter on the machine tool to ensure that the diameter of the shaft hole meets the requirement.
b: and (4) reaming the cylinder hole to enable the diameter of the cylinder hole to meet the requirement.
c: the chamfer sword on the practical lathe carries out the chamfer processing to the one end in jar hole, makes the one end in jar hole form the chamfer.
C: and (3) surface milling, namely milling the surface of the blank in an eccentric polishing mode to ensure that the precision of the surface of the blank reaches the standard. The surface milling comprises the following steps:
a: the blank after reaming is placed on the fixture of the milling and grinding device, the fixture preliminarily fixes the blank, one side of the blank to be processed penetrates through the fixture at the moment, the fixture is located on the lower side of the fixture, the cylinder is started, the output shaft of the cylinder abuts against the gravity center of the upper end face of the blank, the blank cannot vibrate, and the milling and grinding precision of the blank is improved.
b: the milling device adopts an eccentric milling process, adopts a servo motor to drive an eccentric wheel to rotate, and leads the eccentric wheel to mill one side of a blank piece to be processed.
D: and (4) inner diameter milling, namely milling and grinding the inner wall of the reamed hole for multiple times to ensure that the inner diameter of the hole can meet the precision requirement. The inner hole milling and grinding method comprises the following steps:
a: honing the shaft hole, placing the blank on a fixture of a honing machine, honing the inner wall of the shaft hole by a main shaft of the honing machine after the honing machine is started, improving the precision of the inner wall of the shaft hole,
b: honing the cylinder holes, honing the cylinder holes by using a honing machine, honing the cylinder holes with different diameters by adopting main shafts with different diameters, so that each cylinder hole can meet the precision requirement,
the main shaft and the clamp of the honing machine both adopt floating structures, and both the main shaft and the clamp can float to a certain extent, so that the side wall of the main shaft can be better attached to the inner wall of a hole, and the honing precision is higher.
When honing, carry out the surface milling to blank earlier and grind, later carry out the shaft hole honing again, after accomplishing the shaft hole honing, can carry out the surface milling to blank once more and grind, carry out the honing to the cylinder hole again at last, at the in-process of carrying out honing and surface milling, have rivers to wash blank, will be down the sweeps that comes from blank's surface down by grinding, rivers can also cool down blank's surface, prevent that the crankcase from adding man-hour and generating heat and leading to the crankcase to warp, ensure the precision of crankcase.
Claims (6)
1. The high-precision machining process of the crankcase is characterized by comprising the steps of drilling, surface milling and inner diameter milling, wherein the drilling comprises the following steps:
a: a through hole is processed at the position of the blank needing to be punched, the inner wall of the hole is roughly processed and polished during the through hole,
b: reaming, namely reaming the holes on the blank after the through holes to ensure that the inner diameter of the holes meets the required requirements,
c: surface milling, namely milling the surface of the blank in an eccentric grinding mode to ensure that the precision of the surface of the blank reaches the standard,
d: and (4) inner diameter milling, namely milling and grinding the inner wall of the reamed hole for multiple times to ensure that the inner diameter of the hole can meet the precision requirement.
2. A process for high precision machining of crankcase according to claim 1, characterized by that the through hole comprises the following steps:
a: fixing the blank, placing the blank on a fixture of a machine tool, clamping the blank at the gravity center position of the blank by using the fixture, exposing the position to be processed,
b: the cutter on the machine tool punches the axial direction of the blank, the cutter comprises a drill bit and a grinding block, the drill bit rotates at a high speed to punch the blank, the grinding block can grind the punched position of the blank,
c: the cylinder hole through hole uses the cutter on the lathe, drills to the blank, uses the cutter of different specifications to beat the cylinder hole of different diameters on the blank, and the direction in cylinder hole and shaft hole is perpendicular, and the cutter can polish the blank simultaneously when punching.
3. A process for high precision machining of crankcase according to claim 2, wherein the reaming comprises the following steps:
a: the cutter on the machine tool is used for reaming the shaft hole, so that the diameter of the shaft hole meets the requirement,
b: the hole of the cylinder is expanded to ensure that the diameter of the cylinder hole meets the requirement,
c: the chamfer sword on the practical lathe carries out the chamfer processing to the one end in jar hole, makes the one end in jar hole form the chamfer.
4. A process for high precision machining of crankcase according to claim 1, characterized by the fact that the surface milling comprises the following steps:
a: the blank after reaming is placed on a clamp of a milling device, the clamp preliminarily fixes the blank, one side of the blank to be processed passes through the clamp and is positioned at the lower side of the clamp, a cylinder is started, an output shaft of the cylinder abuts against the gravity center of the upper end surface of the blank, the blank cannot vibrate, the milling precision of the blank is improved,
b: the milling device adopts an eccentric milling process, adopts a servo motor to drive an eccentric wheel to rotate, and leads the eccentric wheel to mill one side of a blank piece to be processed.
5. A high-precision machining process for a crankcase according to claim 4, wherein the inner bore milling comprises the following steps:
a: honing the shaft hole, placing the blank on a fixture of a honing machine, honing the inner wall of the shaft hole by a main shaft of the honing machine after the honing machine is started, improving the precision of the inner wall of the shaft hole,
b: honing the cylinder holes, honing the cylinder holes by using a honing machine, honing the cylinder holes with different diameters by adopting main shafts with different diameters, so that each cylinder hole can meet the precision requirement,
the main shaft and the clamp of the honing machine both adopt floating structures, and both the main shaft and the clamp can float to a certain extent, so that the side wall of the main shaft can be better attached to the inner wall of a hole, and the honing precision is higher.
6. A high-precision processing technology for a crankcase according to claim 5, wherein during honing, surface milling is performed on the blank, then shaft hole honing is performed, after the shaft hole honing is completed, surface milling is performed on the blank again, finally cylinder hole honing is performed again, during the honing and surface milling, water flow washes the blank, abraded waste chips are washed off from the surface of the blank, and the water flow can cool the surface of the blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911127458.2A CN110666466A (en) | 2019-11-18 | 2019-11-18 | High-precision machining process of crankcase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911127458.2A CN110666466A (en) | 2019-11-18 | 2019-11-18 | High-precision machining process of crankcase |
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| CN110666466A true CN110666466A (en) | 2020-01-10 |
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| CN201911127458.2A Pending CN110666466A (en) | 2019-11-18 | 2019-11-18 | High-precision machining process of crankcase |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114407394A (en) * | 2021-12-31 | 2022-04-29 | 南京精工新材料有限公司 | Method for manufacturing PE packaging barrel |
Citations (9)
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|---|---|---|---|---|
| US4719677A (en) * | 1986-02-20 | 1988-01-19 | General Motors Corporation | Crankcase manufacturing method |
| CN101633100A (en) * | 2008-07-21 | 2010-01-27 | 鞠小平 | Method for processing forward gear shifting block of automobile parts |
| CN101815597A (en) * | 2007-09-17 | 2010-08-25 | 格林技术有限公司 | Device for fine machining workpieces |
| CN102240961A (en) * | 2010-03-05 | 2011-11-16 | 纳格尔机械及工具制造厂有限责任公司 | Method and apparatus for finish machining crankshaft bearing borehole |
| CN103921118A (en) * | 2014-03-28 | 2014-07-16 | 盐城工学院 | Crankcase vertical-horizontal composite type multi-station combined machine tool |
| CN104002106A (en) * | 2014-06-12 | 2014-08-27 | 靖江市顺达模具厂 | Machining method of crankcase |
| CN104015000A (en) * | 2014-06-12 | 2014-09-03 | 靖江市顺达模具厂 | Method for machining air compressor crankcase |
| CN204584919U (en) * | 2015-03-29 | 2015-08-26 | 四川宇晶建材有限公司 | A kind of eccentric sander |
| CN107116342A (en) * | 2017-05-30 | 2017-09-01 | 胡建锋 | A kind of crankcase mechanical processing technique |
-
2019
- 2019-11-18 CN CN201911127458.2A patent/CN110666466A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4719677A (en) * | 1986-02-20 | 1988-01-19 | General Motors Corporation | Crankcase manufacturing method |
| CN101815597A (en) * | 2007-09-17 | 2010-08-25 | 格林技术有限公司 | Device for fine machining workpieces |
| CN101633100A (en) * | 2008-07-21 | 2010-01-27 | 鞠小平 | Method for processing forward gear shifting block of automobile parts |
| CN102240961A (en) * | 2010-03-05 | 2011-11-16 | 纳格尔机械及工具制造厂有限责任公司 | Method and apparatus for finish machining crankshaft bearing borehole |
| CN103921118A (en) * | 2014-03-28 | 2014-07-16 | 盐城工学院 | Crankcase vertical-horizontal composite type multi-station combined machine tool |
| CN104002106A (en) * | 2014-06-12 | 2014-08-27 | 靖江市顺达模具厂 | Machining method of crankcase |
| CN104015000A (en) * | 2014-06-12 | 2014-09-03 | 靖江市顺达模具厂 | Method for machining air compressor crankcase |
| CN204584919U (en) * | 2015-03-29 | 2015-08-26 | 四川宇晶建材有限公司 | A kind of eccentric sander |
| CN107116342A (en) * | 2017-05-30 | 2017-09-01 | 胡建锋 | A kind of crankcase mechanical processing technique |
Non-Patent Citations (1)
| Title |
|---|
| 杨艳春: "汽车用双缸空气压缩机曲轴箱加工工艺确定", 《现代制造技术与装备》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114407394A (en) * | 2021-12-31 | 2022-04-29 | 南京精工新材料有限公司 | Method for manufacturing PE packaging barrel |
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