CN108561237B - Gasoline engine aluminum piston valve pit and flash processing technology thereof - Google Patents
Gasoline engine aluminum piston valve pit and flash processing technology thereof Download PDFInfo
- Publication number
- CN108561237B CN108561237B CN201810507178.3A CN201810507178A CN108561237B CN 108561237 B CN108561237 B CN 108561237B CN 201810507178 A CN201810507178 A CN 201810507178A CN 108561237 B CN108561237 B CN 108561237B
- Authority
- CN
- China
- Prior art keywords
- valve pit
- valve
- aluminum piston
- piston
- flash
- 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.)
- Active
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 18
- 238000003754 machining Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 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)
- Pistons, Piston Rings, And Cylinders (AREA)
- Drilling And Boring (AREA)
Abstract
The invention relates to the technical field of piston processing, in particular to a processing technology of an aluminum piston valve pit and flash of a gasoline engine. The utility model provides a structure of gasoline engine aluminum piston valve pit and overlap thereof which characterized in that: a group of valve pits are respectively arranged on the main thrust side and the auxiliary thrust side of the top surface of the aluminum piston, and the two valve pits are arranged in a mirror surface manner; the valve pit is of a 'V' -shaped structure, one side of the valve pit is of an outwards-protruding arc structure, one end of the arc structure is provided with a valve pit flash, and the valve pit flash is connected with the outer circle of the piston of the aluminum piston; the other side of the valve pit is of a vertical structure, one end of the vertical structure is connected with the other end of the circular arc, and the other end of the vertical structure is connected with the outer circle of the piston of the aluminum piston. Compared with the prior art, the valve pit cutter is not required to be replaced, so that the machining of all valve pits on the aluminum piston can be completed, the machining period is shortened, the working efficiency is improved, the design of the valve pit flash of the piston is optimized, the valve pit flash is designed into a 'V' -shaped shape, and the overall quality of the aluminum piston is improved.
Description
Technical Field
The invention relates to the technical field of piston processing, in particular to a processing technology of an aluminum piston valve pit and flash of a gasoline engine.
Background
Because the high compression ratio of the gasoline engine piston is continuously increased, an air valve pit is required to be added on the top surface of the piston so as to avoid interference with an air valve when the piston moves to a top dead center. But the deeper valve pit and the valve pit diameter can cause too little material between the machined valve pit and the outer circle of the piston to form sharp edges and burrs, so that a procedure is necessarily added after the valve pit is machined: machining valve pit flash.
For the existing piston processing mode, the cutter for machining the valve pit flash is different from the cutter for machining the valve pit, so that the cutter needs to be replaced after the valve pit is machined. In general, the valve pit diameters Φdts of the main thrust side and the auxiliary thrust side are different, and the cutter changing and processing time are additionally increased twice in the whole processing process, so that the processing period is prolonged by more than 20 seconds, and the additional cost is increased.
For the existing piston machining mode, the machining valve pit burrs are too little in residual materials and burrs generated by machining deviation, and in the running process of an engine: on one hand, the flash temperature is too high due to the premature combustion, the aluminum material is oxidized and falls off, and on the other hand, the airflow is not smooth, so that the particulate matters (PN) in the exhaust gas are increased.
Disclosure of Invention
The invention provides a gasoline engine aluminum piston valve pit and a flash processing technology thereof, which aims to overcome the defects of the prior art.
In order to achieve the above purpose, the structure of the aluminum piston valve pit and the flash of the aluminum piston of the gasoline engine is designed, and the aluminum piston valve pit comprises an aluminum piston and is characterized in that: a group of valve pits are respectively arranged on the main thrust side and the auxiliary thrust side of the top surface of the aluminum piston, the group of valve pits consists of two valve pits, the two valve pits are respectively positioned on the upper side and the lower side of the top surface of the aluminum piston, and the two valve pits are arranged in a mirror surface manner; the valve pit is of a 'V' -shaped structure, one side of the valve pit is of an outwards-protruding arc structure, one end of the arc structure is provided with a valve pit flash, and the valve pit flash is connected with the outer circle of the piston of the aluminum piston; the other side of the valve pit is of a vertical structure, one end of the vertical structure is connected with the other end of the circular arc, and the other end of the vertical structure is connected with the outer circle of the piston of the aluminum piston.
The group of valve pits on the main thrust side and the group of valve pits on the auxiliary thrust side are arranged in a mutually mirror surface mode.
The distance between the valve pit flash and the first annular groove of the aluminum piston is more than or equal to 3.4mm.
The width of the valve pit flash is more than or equal to 1.2mm.
A processing technology of an aluminum piston valve pit and flash of a gasoline engine comprises the following specific processing technology:
(1) Firstly, machining a main thrust side;
(2) After the primary thrust side is machined, the secondary thrust side is machined.
The processing technology of the main thrust side is as follows:
(1) Finding the center of the valve pit, the center line of the pin hole of the aluminum piston and the center line of the aluminum piston;
(2) According to the model of the aluminum piston, defining the diameter of the valve pit as phi Dts, the depth L1st of the valve pit and the angle Bst of the valve pit;
(3) Defining the distance from the center of the valve pit to the center line of the pin hole of the piston as H1ts;
(4) Defining the distance from the center of the valve pit to the center line of the aluminum piston as H2ts;
(5) Obtaining the position Pts of the rotation center of the machining valve pit cutter according to the data of L1st, H1ts and H2 ts;
(6) Taking the rotation center Pts of the valve pit cutter as the starting point of the motion trail;
(7) Defining the radius of a motion track of a rotation center Pts of a valve pit cutter as R1ts;
(8) Defining the chamfer angle between the valve pit and the valve pit flash as R2ts, wherein R2 ts=0.5 mm constant;
(9) Yielding r1ts=r2ts+ (Φdts/2);
(10) An included angle formed by a tangent line of a movement track of the rotation center of the cutter and the central line of a pin hole of the aluminum piston is Ats, and the value range of Ats is 50-60 degrees.
The processing technology of the auxiliary thrust side is consistent with that of the main thrust side.
Compared with the prior art, the processing technology of the main thrust side and the auxiliary thrust side of the aluminum piston can finish the processing of all valve pits on the aluminum piston without replacing valve pit cutters, thereby reducing the processing period and greatly improving the working efficiency. And the design of the valve pit flash of the piston is optimized, the valve pit flash is designed into a 'V' -shape, and the overall quality of the aluminum piston is improved.
Drawings
Fig. 1 is a top view of the structure of the present invention.
Fig. 2 is a front view of the structure of the present invention.
FIG. 3 is a schematic view of the processing technology of the present invention.
Fig. 4 is a schematic diagram of a valve pit top-down machining process.
Fig. 5 is a sectional view taken along the direction E-E in fig. 4.
Referring to fig. 1, fig. 2,1 is a valve pit burr, 2 is a piston outer circle, 3 is a valve pit, 4 is an aluminum piston, and 5 is a first ring groove 5.
Referring to fig. 3 to 5,1 is a valve pit burr, 3 is a valve pit, 7 is a pin hole center line of an aluminum piston, 8 is a center line of the aluminum piston, 9 is a diameter of the valve pit, 10 is a radius of a tool rotation center movement track, 11 is a distance from the valve pit center to the pin hole center line of the piston, 12 is an included angle formed by a tangent line of the tool rotation center movement track and the pin hole center line of the aluminum piston, 13 is a valve pit tool rotation center movement track, 14 is a chamfer angle between the valve pit and the valve pit burr, and 15 is a distance from the valve pit center to the center line of the aluminum piston.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a group of valve pits are respectively arranged on a main thrust side and a secondary thrust side of the top surface of the aluminum piston 4, the group of valve pits consists of two valve pits, two valve pits 3 are respectively positioned on the upper side and the lower side of the top surface of the aluminum piston 4, and the two valve pits 3 are arranged in a mutually mirror surface manner; the valve pit 3 is of a 'V' -shaped structure, one side of the valve pit 3 is of an outwards-protruding arc structure, one end of the arc structure is provided with a valve pit flash 1, and the valve pit flash 1 is connected with a piston outer circle 2 of the aluminum piston 4; the other side of the valve pit 3 is of a vertical structure, one end of the vertical structure is connected with the other end of the circular arc, and the other end of the vertical structure is connected with the piston excircle 2 of the aluminum piston 4.
The group of valve pits on the main thrust side and the group of valve pits on the auxiliary thrust side are arranged in a mirror surface mode.
The distance between the valve pit flash 1 and the first annular groove 5 of the aluminum piston 4 is more than or equal to 3.4mm.
The width of the valve pit flash 1 is more than or equal to 1.2mm.
As shown in fig. 3 to 5, a processing technology of an aluminum piston valve pit and flash of a gasoline engine is as follows:
(1) Finding the center of the valve pit, the center line of the pin hole of the aluminum piston and the center line of the aluminum piston;
(2) According to the model of the aluminum piston, defining the diameter of the valve pit as phi Dts, the depth L1st of the valve pit and the angle Bst of the valve pit;
(3) Defining the distance from the center of the valve pit to the center line of the pin hole of the piston as H1ts;
(4) Defining the distance from the center of the valve pit to the center line of the aluminum piston as H2ts;
(5) Obtaining the position Pts of the rotation center of the machining valve pit cutter according to the data of L1st, H1ts and H2 ts;
(6) Taking the rotation center Pts of the valve pit cutter as the starting point of the motion trail;
(7) Defining the radius of a motion track of a rotation center Pts of a valve pit cutter as R1ts;
(8) Defining the chamfer angle between the valve pit and the valve pit flash as R2ts, wherein R2 ts=0.5 mm constant;
(9) Yielding r1ts=r2ts+ (Φdts/2);
(10) An included angle formed by a tangent line of a movement track of the rotation center of the cutter and the central line of a pin hole of the aluminum piston is Ats, and the value range of Ats is 50-60 degrees.
The processing technology of the auxiliary thrust side is consistent with that of the main thrust side.
According to the processing technology of the main thrust side and the auxiliary thrust side of the aluminum piston, the processing of all valve pits on the aluminum piston can be completed without replacing valve pit cutters, the processing period is shortened, and the working efficiency is greatly improved. And the design of the valve pit flash of the piston is optimized, the valve pit flash is designed into a 'V' -shape, and the overall quality of the aluminum piston is improved.
Claims (4)
1. The utility model provides a structure of gasoline engine aluminum piston valve pit and overlap thereof, includes aluminum piston, its characterized in that: a group of valve pits are respectively arranged on the main thrust side and the auxiliary thrust side of the top surface of the aluminum piston (4), the group of valve pits consists of two valve pits, the two valve pits (3) are respectively positioned on the upper side and the lower side of the top surface of the aluminum piston (4), and the two valve pits (3) are arranged in a mirror surface manner; the valve pit (3) is of a 'V' -shaped structure, one side of the valve pit (3) is of an outwards-protruding arc structure, one end of the arc structure is provided with a valve pit flash (1), and the valve pit flash (1) is connected with a piston excircle (2) of the aluminum piston (4); the other side of the valve pit (3) is of a vertical structure, one end of the vertical structure is connected with the other end of the circular arc, and the other end of the vertical structure is connected with a piston excircle (2) of the aluminum piston (4);
The processing technology of the aluminum piston valve pit and the flash of the gasoline engine comprises the following specific processing technology:
(1) Firstly, machining a main thrust side;
(2) After the main thrust side is processed, the auxiliary thrust side is processed;
the processing technology of the main thrust side is as follows:
(1-1) finding the center of a valve pit, the center line of a pin hole of an aluminum piston and the center line of the aluminum piston;
(1-2) defining the diameter of the valve pit as phi Dts, the depth of the valve pit L1st and the angle Bst of the valve pit according to the model of the aluminum piston;
(1-3) defining a distance H1ts from the center of the valve pit to the center line of the pin hole of the piston;
(1-4) defining the distance from the center of the valve pit to the center line of the aluminum piston as H2ts;
(1-5) obtaining the position Pts of the rotation center of the machining valve pit cutter according to the data of L1st, H1ts and H2 ts; (1-6) taking the rotation center Pts of the valve pit cutter as the starting point of the motion trail;
(1-7) defining the radius of the motion trail of the rotation center Pts of the valve pit cutter as R1ts;
(1-8) defining a chamfer angle between the valve pit and the valve pit flash as r2ts, r2ts=0.5mm constant;
(1-9) to yield r1ts=r2ts+ (Φdts/2);
(1-10) the included angle formed by the tangent of the movement track of the rotation center of the cutter and the central line of the pin hole of the aluminum piston is Ats, and the value range of Ats is 50-60 degrees;
the processing technology of the auxiliary thrust side is consistent with that of the main thrust side.
2. The structure of the aluminum piston valve pit and the flash thereof of the gasoline engine according to claim 1 is characterized in that: the group of valve pits on the main thrust side and the group of valve pits on the auxiliary thrust side are arranged in a mutually mirror surface mode.
3. The structure of the aluminum piston valve pit and the flash thereof of the gasoline engine according to claim 1 is characterized in that: the distance between the valve pit flash (1) and the first annular groove (5) of the aluminum piston (4) is more than or equal to 3.4mm.
4. A structure of an aluminum piston valve pit and flash thereof for a gasoline engine according to claim 1 or 3, wherein: the width of the valve pit flash (1) is more than or equal to 1.2mm.
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 CN108561237A (en) | 2018-09-21 |
| CN108561237B true 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 |
|---|---|
| CN (1) | CN108561237B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2725552Y (en) * | 2004-07-29 | 2005-09-14 | 龙口市大川活塞有限公司 | Piston |
| EP1614885A2 (en) * | 2004-07-07 | 2006-01-11 | Yuejun Huang | One-piece steel 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 |
| CN201635861U (en) * | 2009-12-30 | 2010-11-17 | 绵阳新晨动力机械有限公司 | Piston of diesel engine for high-speed vehicles |
| 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 |
| CN204436611U (en) * | 2014-12-11 | 2015-07-01 | 海马轿车有限公司 | Engine piston |
| CN104879234A (en) * | 2015-05-22 | 2015-09-02 | 奇瑞汽车股份有限公司 | Engine piston |
| CN106112645A (en) * | 2016-08-23 | 2016-11-16 | 山东双港活塞股份有限公司 | Swing piston port hole processing unit (plant) and using method thereof |
| CN205805695U (en) * | 2016-07-15 | 2016-12-14 | 北京汽车动力总成有限公司 | A kind of piston of automobile engine combustor and automobile |
| CN106762101A (en) * | 2016-11-21 | 2017-05-31 | 清华大学 | A kind of directly jetting gasoline engine combustion system and control method |
| CN107110063A (en) * | 2014-10-30 | 2017-08-29 | 费德罗-莫格尔有限责任公司 | Piston |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012103212A1 (en) * | 2012-04-13 | 2013-10-17 | Mwm Gmbh | Piston of an internal combustion engine |
| US10233865B2 (en) * | 2016-09-30 | 2019-03-19 | Mahle International Gmbh | Piston crown having conical valve pocket |
-
2018
- 2018-05-24 CN CN201810507178.3A patent/CN108561237B/en active Active
Patent Citations (12)
| 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 |
| CN201635861U (en) * | 2009-12-30 | 2010-11-17 | 绵阳新晨动力机械有限公司 | Piston of diesel engine for high-speed vehicles |
| 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 |
| CN107110063A (en) * | 2014-10-30 | 2017-08-29 | 费德罗-莫格尔有限责任公司 | Piston |
| CN204436611U (en) * | 2014-12-11 | 2015-07-01 | 海马轿车有限公司 | Engine piston |
| CN104879234A (en) * | 2015-05-22 | 2015-09-02 | 奇瑞汽车股份有限公司 | Engine piston |
| CN205805695U (en) * | 2016-07-15 | 2016-12-14 | 北京汽车动力总成有限公司 | A kind of piston of automobile engine combustor and automobile |
| CN106112645A (en) * | 2016-08-23 | 2016-11-16 | 山东双港活塞股份有限公司 | Swing piston port hole processing unit (plant) and using method thereof |
| CN106762101A (en) * | 2016-11-21 | 2017-05-31 | 清华大学 | A kind of directly jetting gasoline engine combustion system and control method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108561237A (en) | 2018-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202399030U (en) | Expansion clamp | |
| CN110125791B (en) | Floating connector | |
| CN108561237B (en) | Gasoline engine aluminum piston valve pit and flash processing technology thereof | |
| CN203875650U (en) | Y-shaped rocker arm molded face milling and positioning fixture | |
| CN202278537U (en) | Mounting tool for sealing ring on piston of oil cylinder | |
| CN213164191U (en) | Steel body piston processing location frock | |
| CN202894429U (en) | Novel drilling reamer | |
| CN204262386U (en) | For processing the cutter of cannelure | |
| CN207155335U (en) | A kind of fixture of anti-cage ring machining deformation | |
| CN205422961U (en) | Engine cylinder overlaps ring that wear -resistants | |
| CN202174431U (en) | Excircle turning tool for pin sleeve by means of profiling | |
| CN209288830U (en) | A kind of piston cap processing vertical lathe hydraulically operated fixture | |
| CN208033667U (en) | A kind of spherical surface processing tool based on lathe in machining V-type semicircle valve ball | |
| CN104259794A (en) | Manufacturing process beneficial to piston ring quality | |
| CN203076959U (en) | Clamp of drum type brake bottom plate bored hole | |
| CN213437252U (en) | Flange expansion sleeve type clamp | |
| CN204353605U (en) | The oblique T-slot cutting ferrule clamp for machining of rig | |
| CN203356624U (en) | Ultrasonic machining head for machining surface parallel to rotating main shaft | |
| CN201693230U (en) | High-efficiency cutting tool for processing ring-shaped sealing groove | |
| CN204843542U (en) | Grind way machine knife piece slotting attachment | |
| CN203030936U (en) | Cutter for processing piston rings of automobiles | |
| CN220762385U (en) | Clamp tool for flywheel housing processing production | |
| CN204235482U (en) | Light-duty slip yoke assembly force feed binder tool | |
| CN214978238U (en) | Special-shaped gear shaping cutter | |
| CN208758882U (en) | A kind of automobile absorber lower lift ring welding fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |