CN108561237A - A kind of processing technology of gasoline engine aluminum piston valve hole and its overlap - Google Patents
A kind of processing technology of gasoline engine aluminum piston valve hole and its overlap Download PDFInfo
- Publication number
- CN108561237A CN108561237A CN201810507178.3A CN201810507178A CN108561237A CN 108561237 A CN108561237 A CN 108561237A CN 201810507178 A CN201810507178 A CN 201810507178A CN 108561237 A CN108561237 A CN 108561237A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve hole
- overlap
- aluminum piston
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 65
- 238000005516 engineering process Methods 0.000 title claims abstract description 27
- 241000209202 Bromus secalinus Species 0.000 claims abstract description 19
- 238000003754 machining Methods 0.000 claims abstract description 11
- 239000004744 fabric Substances 0.000 claims 1
- 238000005457 optimization Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- F02F3/00—Pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
-
- 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
- F02F2200/00—Manufacturing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Drilling And Boring (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The present invention relates to Piston Machining technical field, the processing technology of specifically a kind of gasoline engine aluminum piston valve hole and its overlap.A kind of structure of gasoline engine aluminum piston valve hole and its overlap, it is characterised in that：It is respectively equipped with one group of valve hole in the main thrust side of aluminum piston top surface and secondary thrust sides, two valve holes are that mutual minute surface is arranged；The valve hole is in " √ " type structure, and the side in valve hole is the arc structure of outwardly convex, and one end of arc structure is equipped with valve and cheats overlap, and valve cheats overlap and the outside piston of aluminum piston connects；The other side in valve hole is vertical structure, the other end of one end connection circular arc of vertical structure, the outside piston of the other end connection aluminum piston of vertical structure.Compared with the existing technology, nothing needs to change the processing in all valves hole that valve hole cutter can be completed on aluminum piston, reduces the process-cycle, it improves work efficiency, optimization piston valve cheats the design of overlap, is designed to the shape of " √ ", improves the overall quality of aluminum piston.
Description
Technical field
The present invention relates to Piston Machining technical field, specifically a kind of gasoline engine aluminum piston valve hole and its overlap
Processing technology.
Background technology
Since the high compression ratio of piston of gasoline engine is on the increase, to need to increase valve hole in piston-top surface to avoid work
When plug moves to top dead centre and valve interference.But deeper valve hole can cause the valve after machining to be cheated with valve hole diameter
Material between outside piston is very few, forms sharp side, burr, inevitable in this way to increase by a procedure after processing valve hole：
It machines valve and cheats overlap.
For existing Piston Machining mode, since it machines the cutter that valve cheats the cutter and machining valve hole of overlap
Difference leads to process valve hole and needs to change cutter.Normal conditions, the valve hole diameter of phi Dts of main thrust side and secondary thrust sides
Difference, whole process need to additionally increase tool changing twice and process time, are more than 20 seconds to extend the process-cycle, increase
Extra charge.
For existing Piston Machining mode, since the machining valve hole remaining material of overlap is very few and machining deviation
And the burr generated, in engine operation process：On the one hand early combustion causes overlap temperature excessively high, and aluminum material oxidation is de-
It falls, another aspect air motion is unsmooth, leads to particulate matter in discharge gas（PN）Increase.
Invention content
The present invention in order to overcome the deficiencies of the prior art, provides the processing work of a kind of gasoline engine aluminum piston valve hole and its overlap
Skill.
To achieve the above object, the structure of a kind of gasoline engine aluminum piston valve hole and its overlap, including aluminum piston are designed,
It is characterized in that：It is respectively equipped with one group of valve hole, described one group of valve hole in the main thrust side of aluminum piston top surface and secondary thrust sides
It is made of two valve holes, and two valve holes are located at the upside and downside of aluminum piston top surface, two valve holes are phase
Mutual minute surface arrangement；The described valve hole is in " √ " type structure, and the side in valve hole is the arc structure of outwardly convex, and circular arc
One end of structure is equipped with valve and cheats overlap, and valve cheats overlap and the outside piston of aluminum piston connects；The other side in valve hole is perpendicular
Straight structure, the other end of one end connection circular arc of vertical structure, the outside piston of the other end connection aluminum piston of vertical structure.
One group of valve hole of the main thrust side is that mutual minute surface is arranged with one group of valve hole of secondary thrust sides.
The valve cheats overlap and is more than or equal to 3.4mm at a distance from the first annular groove of aluminum piston.
The width of the valve hole overlap is more than or equal to 1.2mm.
The processing technology of a kind of gasoline engine aluminum piston valve hole and its overlap, specific processing technology is as follows：
（1）First processing main thrust side；
（2）After processing main thrust side, secondary thrust sides are processed.
The processing technology of the main thrust side is as follows：
（1）Find valve hole center, the pin aperture centerline of aluminum piston, aluminum piston center line；
（2）According to the model of aluminum piston, the angle that a diameter of Φ Dts in valve hole, the depth L1st in valve hole, valve are cheated is defined
Bst；
（3）It is H1ts to define the distance that valve cheats center to the pin aperture centerline of piston；
（4）It is H2ts to define the distance that valve cheats center to the center line of aluminum piston；
（5）Show that machining valve cheats the position Pts of cutter rotation center according to the data of L1st, H1ts and H2ts；
（6）Cutter rotation center Pts is cheated as the starting point of movement locus using valve；
（7）The radius for defining valve hole cutter rotation center Pts movement locus is R1ts；
（8）The chamfering defined between valve hole and valve hole overlap is R2ts, R2ts=0.5mm constants；
（9）Obtain R1ts=R2ts+（ΦDts/2）；
（10）The angle that the tangent line of cutter rotation center movement locus and the pin aperture centerline of aluminum piston are formed is Ats, and Ats takes
Ranging from 50 ° ~ 60 ° of value.
The processing technology of the secondary thrust sides is consistent with the processing technology of main thrust side.
The present invention compared with the existing technology, according to the main thrust side of aluminum piston and the processing technology of secondary thrust sides, is not necessarily to more
The processing in the hole of all valves on aluminum piston can be completed in ventilation door hole cutter, reduces the process-cycle, substantially increases work
Efficiency.And optimization piston valve cheats the design of overlap, is designed to the shape of " √ ", improves the overall quality of aluminum piston.
Description of the drawings
Fig. 1 is structure of the invention vertical view.
Fig. 2 is structure of the invention front view.
Fig. 3 is processing technology schematic diagram of the present invention.
Fig. 4 is that processing technology schematic diagram is overlooked in valve hole.
Fig. 5 be in Fig. 4 E-E to sectional view.
It is that valve cheats overlap referring to Fig. 1, Fig. 2,1,2 be outside piston, and 3 cheat for valve, and 4 be aluminum piston, and 5 be the first annular groove
5。
Overlap is cheated for valve referring to Fig. 3 to Fig. 5,1,3 cheat for valve, and 7 be the pin aperture centerline of aluminum piston, and 8 be aluminum piston
Center line, 9 for valve hole diameters, 10 be the radius of cutter rotation center movement locus, and 11 cheat center to piston for valve
Pin aperture centerline distance, 12 for cutter rotation center movement locus tangent line and aluminum piston pin aperture centerline formed folders
Angle, 13 cheat cutter rotation center movement locus for valve, and 14 cheat the chamfering between the overlap of valve hole for valve, and 15 cheat for valve
Center to the center line of aluminum piston distance.
Specific implementation mode
The invention will now be described in further detail with reference to the accompanying drawings.
Such as Fig. 1, shown in Fig. 2, one group of valve hole, institute are respectively equipped in the main thrust side of 4 top surface of aluminum piston and secondary thrust sides
The one group of valve hole stated is made of two valves hole, and two valves holes 3 be located at 4 top surface of aluminum piston upside and under
Side, two valve holes 3 are arranged for mutual minute surface；The valve hole 3 is in " √ " type structure, and the side in valve hole 3 is convex
The arc structure risen, and one end of arc structure is equipped with valve and cheats overlap 1, and valve cheats the outside piston of overlap 1 and aluminum piston 4
2 connections；Valve hole 3 the other side be vertical structure, vertical structure one end connection circular arc the other end, vertical structure it is another
The outside piston 2 of end connection aluminum piston 4.
One group of valve hole of main thrust side is that mutual minute surface is arranged with one group of valve hole of secondary thrust sides.
Valve cheats overlap 1 and is more than or equal to 3.4mm at a distance from the first annular groove 5 of aluminum piston 4.
The width that valve cheats overlap 1 is more than or equal to 1.2mm.
As shown in Figures 3 to 5, the processing technology of a kind of gasoline engine aluminum piston valve hole and its overlap, specific processing technology
It is as follows：
（1）Find valve hole center, the pin aperture centerline of aluminum piston, aluminum piston center line；
（2）According to the model of aluminum piston, the angle that a diameter of Φ Dts in valve hole, the depth L1st in valve hole, valve are cheated is defined
Bst；
（3）It is H1ts to define the distance that valve cheats center to the pin aperture centerline of piston；
（4）It is H2ts to define the distance that valve cheats center to the center line of aluminum piston；
（5）Show that machining valve cheats the position Pts of cutter rotation center according to the data of L1st, H1ts and H2ts；
（6）Cutter rotation center Pts is cheated as the starting point of movement locus using valve；
（7）The radius for defining valve hole cutter rotation center Pts movement locus is R1ts；
（8）The chamfering defined between valve hole and valve hole overlap is R2ts, R2ts=0.5mm constants；
（9）Obtain R1ts=R2ts+（ΦDts/2）；
（10）The angle that the tangent line of cutter rotation center movement locus and the pin aperture centerline of aluminum piston are formed is Ats, and Ats takes
Ranging from 50 ° ~ 60 ° of value.
The processing technology of secondary thrust sides is consistent with the processing technology of main thrust side.
According to the main thrust side of aluminum piston and the processing technology of secondary thrust sides, aluminium can be completed without valve hole cutter is needed to change
The processing in all valves hole on piston, reduces the process-cycle, greatly improves work efficiency.And optimization piston valve is cheated
The design of overlap is designed to the shape of " √ ", improves the overall quality of aluminum piston.
Claims (7)
1. the structure of a kind of gasoline engine aluminum piston valve hole and its overlap, including aluminum piston, it is characterised in that：In aluminum piston（4）
The main thrust side of top surface and secondary thrust sides are respectively equipped with one group of valve hole, and described one group of valve hole is made of two valve holes,
And two valve holes（3）It is located at aluminum piston（4）The upside and downside of top surface, two valve holes（3）For mutual minute surface cloth
It sets；The valve hole（3）In " √ " type structure, valve hole（3）Side be outwardly convex arc structure, and circular arc knot
One end of structure is equipped with valve and cheats overlap（1）, valve hole overlap（1）With aluminum piston（4）Outside piston（2）Connection；Valve is cheated（3）
The other side be vertical structure, the other end of one end connection circular arc of vertical structure, the other end of vertical structure connects aluminum piston
（4）Outside piston（2）.
2. the structure of a kind of gasoline engine aluminum piston valve hole according to claim 1 and its overlap, it is characterised in that：It is described
One group of valve hole of main thrust side and one group of valve hole of secondary thrust sides be that mutual minute surface is arranged.
3. the structure of a kind of gasoline engine aluminum piston valve hole according to claim 1 and its overlap, it is characterised in that：It is described
Valve cheat overlap（1）With aluminum piston（4）The first annular groove（5）Distance be more than or equal to 3.4mm.
4. the structure of a kind of gasoline engine aluminum piston valve hole according to claim 1 or 3 and its overlap, it is characterised in that：
The valve cheats overlap（1）Width be more than or equal to 1.2mm.
5. the processing technology of a kind of gasoline engine aluminum piston valve hole and its overlap, it is characterised in that：Specific processing technology is as follows：
First processing main thrust side；
After processing main thrust side, secondary thrust sides are processed.
6. the processing technology of a kind of gasoline engine aluminum piston valve hole according to claim 5 and its overlap, it is characterised in that：
The processing technology of the main thrust side is as follows：
（1）Find valve hole center, the pin aperture centerline of aluminum piston, aluminum piston center line；
（2）According to the model of aluminum piston, the angle that a diameter of Φ Dts in valve hole, the depth L1st in valve hole, valve are cheated is defined
Bst；
（3）It is H1ts to define the distance that valve cheats center to the pin aperture centerline of piston；
（4）It is H2ts to define the distance that valve cheats center to the center line of aluminum piston；
（5）Show that machining valve cheats the position Pts of cutter rotation center according to the data of L1st, H1ts and H2ts；
（6）Cutter rotation center Pts is cheated as the starting point of movement locus using valve；
（7）The radius for defining valve hole cutter rotation center Pts movement locus is R1ts；
（8）The chamfering defined between valve hole and valve hole overlap is R2ts, R2ts=0.5mm constants；
（9）Obtain R1ts=R2ts+（ΦDts/2）；
（10）The angle that the tangent line of cutter rotation center movement locus and the pin aperture centerline of aluminum piston are formed is Ats, Ats values
Ranging from 50 ° ~ 60 °.
7. the processing technology of a kind of gasoline engine aluminum piston valve hole according to claim 5 or 6 and its overlap, feature exists
In：The processing technology of the secondary thrust sides is consistent with the processing technology of main thrust side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810507178.3A CN108561237B (en) | 2018-05-24 | 2018-05-24 | Gasoline engine aluminum piston valve pit and flash processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810507178.3A CN108561237B (en) | 2018-05-24 | 2018-05-24 | Gasoline engine aluminum piston valve pit and flash processing technology thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108561237A true CN108561237A (en) | 2018-09-21 |
| CN108561237B CN108561237B (en) | 2024-05-14 |
Family
ID=63539634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810507178.3A Active CN108561237B (en) | 2018-05-24 | 2018-05-24 | Gasoline engine aluminum piston valve pit and flash processing technology thereof |
Country Status (1)
| Country | Link |
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| CN106762101A (en) * | 2016-11-21 | 2017-05-31 | 清华大学 | A kind of directly jetting gasoline engine combustion system and control method |
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| US20180094604A1 (en) * | 2016-09-30 | 2018-04-05 | Mahle International Gmbh | Piston crown having conical valve seat and method for manufacturing a piston crown having a conically shaped valve seat |
| CN208605291U (en) * | 2018-05-24 | 2019-03-15 | 华域科尔本施密特活塞有限公司 | A kind of gasoline engine aluminum piston with valve hole |
-
2018
- 2018-05-24 CN CN201810507178.3A patent/CN108561237B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1614885A2 (en) * | 2004-07-07 | 2006-01-11 | Yuejun Huang | One-piece steel piston |
| CN2725552Y (en) * | 2004-07-29 | 2005-09-14 | 龙口市大川活塞有限公司 | Piston |
| CN201250714Y (en) * | 2008-09-05 | 2009-06-03 | 重庆长安汽车股份有限公司 | Engine plunger top combustion chamber |
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| CN103182647A (en) * | 2011-12-29 | 2013-07-03 | 安徽省恒泰动力科技有限公司 | Positioning device and positioning method for rough process of piston rabbet |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108561237B (en) | 2024-05-14 |
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