CN103306843B - Engine cylinder head and processing method of main oil gallery tappet holes of engine cylinder head - Google Patents
Engine cylinder head and processing method of main oil gallery tappet holes of engine cylinder head Download PDFInfo
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- CN103306843B CN103306843B CN201310262119.1A CN201310262119A CN103306843B CN 103306843 B CN103306843 B CN 103306843B CN 201310262119 A CN201310262119 A CN 201310262119A CN 103306843 B CN103306843 B CN 103306843B
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- engine cylinder
- main oil
- core
- cylinder cap
- oil gallery
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- 238000003672 processing method Methods 0.000 title abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000005266 casting Methods 0.000 claims description 17
- 238000003754 machining Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 127
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 abstract description 14
- 239000004411 aluminium Substances 0.000 abstract description 14
- 238000004140 cleaning Methods 0.000 abstract description 7
- 239000003595 mist Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000010687 lubricating oil Substances 0.000 abstract description 2
- 239000004576 sand Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000007493 shaping process Methods 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention relates to an engine cylinder head and a processing method of main oil gallery tappet holes of the engine cylinder head. The engine cylinder head comprises two main oil galleries, tappet holes and valve spring mounting holes, and is specialized in that the cross sections of the main oil galleries are long circle-shaped; the long axis direction of the long circles is in the width direction of the engine cylinder head; the short axis of the long circles is in the height direction of the engine cylinder head; and the main oil galleries are communicated with the tappet holes through cross structures. The method has the advantages as follows: 1. through the change of the sand mold structure, the main oil galleries and the tappet holes adopt cast formation, the processing technology is simplified, no deep hole processing equipment is needed, the processing time is reduced, and the manufacturing cost and the processing difficulty are reduced, 2.the opening directions and the sizes of oil draining holes at the bottom of the tappet holes are adjusted, the problem of aluminium skimming cleaning difficulty is solved, and the cost waste caused by cleaning the aluminium skimming is reduced, and 3. the addition of oil draining grooves in the valve spring mounting holes cannot increase the manufacturing cost, and can effectively reduce the oil mist problem produced due to the lubricating oil gathering in counter bores.
Description
Technical field
The present invention relates to the processing method of a kind of automobile component, particularly engine cylinder cap and described cylinder head main oil gallery and tappet hole, belong to automobile technical field.
Background technique
Engine cylinder cap is the important feature assembly forming motor.Its purposes is closed cylinder top mainly, forms firing chamber. and the support of air inlet-outlet pipe is also had as camshaft and pitman arm shaft, and air is drawn onto cylinder interior, and mixed gas is in the outburst of firing chamber combustion, and drive piston acting, waste gas is discharged from outlet pipe.Modern Engine cylinder head is provided with main oil gallery and oil sump, lubricant oil, by parts such as main oil gallery camshaft lubrication, tappet, rocking arms, then collects the oil sump of oil return to engine bottom by oil sump.Cylinder head oil sump is furnished with the structures such as tappet hole, valve spring mounting hole, back oil road, cylinder bolt installation base, tappet hole intermediate section communicates with main oil gallery, there is provided high pressure oil to hydraulic tappet, bottom has drain pan by lubricant oil earial drainage unnecessary in tappet hole to oil sump; Valve spring mounting hole mainly supports valve spring, and plays leading role to valve spring.
At present, engine cylinder cap has following problem in structural design and processing method: 1. the cylinder head main oil gallery of motor all adopts machining shaping, is processed by the main oil gallery running through cylinder head by Deep-Hole Drilling Technology.Grow because main oil gallery is thin, deep hole processing difficulty is large, and technological requirement is high, wastes time and energy; 2. main oil gallery and tappet hole realize through by machine-tooled method, sharp edge, burr is very easily formed in through position, in most cases these sharp edges, burr need special device to clear up, and cannot accomplish to remove thoroughly, in motor using process, these burrs easily come off, and enter each kinematic pair with lubricant oil, the lighter causes kinematic pair scuffing, abnormal sound, severe one causes kinematic pair inordinate wear until stuck, and stopping suddenly appears in motor, affects service life of aeroengine.3. bottom the tappet hole in cylinder head oil sump, drain pan opening direction forward and little with cylinder head bolt lug gap, a large amount of aluminium bits are produced in cylinder cap course of working, it is unclean that aluminium bits can be stuck in cleaning in drain pan, in engine operation process, aluminium is considered lubricated oil to be worth doing and is cleaned out and enter main oil gallery with lubricant oil, causes the movement parts inordinate wears such as bent axle, camshaft, piston; 4. for ensureing the guiding of valve spring, valve spring mounting hole is designed to counterbore, in engine operation process, parts of lubricating oil enters in valve spring mounting hole and cannot discharge, due to moving up and down of valve spring, lubricant oil in counterbore is splashed, oil moisture content in oil sump is caused to increase sharply, mist of oil enters the deaerator in valve mechanism cover with crankcase waste gas, the work load of deaerator is increased, cause oil gas sub-argument unclear, mist of oil enters firing chamber and participates in burning, and the problem of burn oil appears in motor.
Summary of the invention
The object of the invention is to the drawback for prior art, a kind of engine cylinder cap not easily accumulating machining chips, reduce mist of oil in oil sump is provided; Another object of the present invention is to provide a kind of good manufacturability, is easy to the engine cylinder cap main oil gallery tappet hole processing method of processing.
Problem of the present invention realizes with following technical proposals:
A kind of engine cylinder cap, it comprises two main oil gallerys, tappet hole, cylinder bolt platform and valve spring mounting hole, its specialization is, the cross section of described main oil gallery is long-round-shape, this oblong long axis direction is along engine cylinder cap width direction, this oblong minor axis is along engine cylinder cap short transverse, and main oil gallery is communicated with tappet hole through connecting bridge.
Above-mentioned engine cylinder cap, described connecting bridge and main oil gallery and tappet hole connection smooth transition.
Above-mentioned engine cylinder cap, described tappet hole bottom is provided with oil leak hole, and oil leak hole opening deflection cylinder bolt platform side, oil leak hole height dimension B is 9-10 millimeter.
Above-mentioned engine cylinder cap, the side edge of described valve spring mounting hole is provided with oil unloading trough.
Above-mentioned engine cylinder cap main oil gallery tappet hole processing method, described main oil gallery is formed by casting, and described tappet hole is by cast and machining forms, through by the connecting bridge of casting between main oil gallery and tappet hole.
Above-mentioned engine cylinder cap main oil gallery tappet hole processing method, casting sand core structure comprises oil pocket core, tappet hole core, connecting bridge core and main oil gallery core, wherein, main oil gallery core be arranged two in parallel, each bar main oil gallery core respectively through eight connecting bridge cores and eight root elevator post holes cores affixed, one end of each tappet hole core is affixed with oil pocket core respectively.
Above-mentioned engine cylinder cap main oil gallery tappet hole processing method, described tappet hole core is Step Shaft shape, and the diameter of tappet hole core root and oil pocket core connection part is larger.
Above-mentioned engine cylinder cap main oil gallery tappet hole processing method, described main oil gallery core cross section is long-round-shape, and its cross-sectional dimension longitudinal axis L is 11 millimeters, and minor axis H is 7 millimeters.
Above-mentioned engine cylinder cap main oil gallery tappet hole processing method, the diameter at described tappet hole core larger diameter place is 9 millimeters, and the diameter at small diameter place is 8 millimeters.
Major advantage of the present invention is as follows: 1, by changing sand mould structure, and main oil gallery and tappet hole are adopted casting, simplified processing process, without the need to deep hole processing equipment, reduces process time, reduces manufacture cost and difficulty of processing; 2, main oil gallery is directly communicated by connecting bridge with tappet hole, reduces the burr that course of working produces, to the scuffing of movement parts after avoiding burr to come off; 3. by oil leak hole opening direction and size adjusting bottom tappet hole, solve the problem of aluminium bits cleaning difficulty, reduce because cleaning aluminium considers the cost waste caused to be worth doing; Can avoid again causing because aluminium bits clear up the inordinate wear problem thoroughly do not caused, improve product reliability; 4. the drain pan of valve spring mounting hole increase, effectively can reduce because generation mist of oil problem assembled by the lubricant oil in counterbore, fundamentally avoid the generation of burn oil problem under the condition not increasing cost of production.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is structural representation of the present invention (plan view);
Fig. 2 is the A-A sectional view (amplification) of Fig. 1;
Fig. 3 is structural representation of the present invention (front view);
Fig. 4 is Fig. 3 D place zoomed-in view;
Fig. 5 is casting sand core schematic diagram;
Fig. 6 is the E direction view of Fig. 5;
Fig. 7 is the C-C sectional view (amplification) of Fig. 6.
In figure, each list of reference numerals is: 1, engine cylinder cap, 2, main oil gallery, 3, connecting bridge, 4, tappet hole, 5, valve spring mounting hole, 6, oil unloading trough, 7, cylinder bolt platform, 8, oil leak hole, 9, oil pocket core, 10, main oil gallery core, 11, tappet hole core, 12, connecting bridge core, 13, main oil gallery be communicated with oil duct.
Embodiment
Referring to Fig. 1-3, engine cylinder cap 1 of the present invention comprises two main oil gallerys 2, tappet hole 4, cylinder bolt platform 7 and valve spring mounting hole 5.Article two, main oil gallery is communicated with by main oil gallery connection oil duct 13.The cross section of described main oil gallery 2 is long-round-shape, and this oblong long axis direction is along engine cylinder cap width direction, and this oblong minor axis is along engine cylinder cap short transverse.Be communicated with through connecting bridge 3 between main oil gallery with tappet hole 4, the connection rounding off of connecting bridge and main oil gallery and tappet hole.
Referring to Fig. 3, Fig. 4, be provided with oil leak hole 8 in the bottom of tappet hole 4, the described oil leak hole of difference from prior art is not arranged on immediately below tappet hole, but opening deflection cylinder bolt platform 7 side, oil leak hole height dimension B is 9-10 millimeter.In cylinder cap course of working, produce a large amount of aluminium bits, aluminium bits can be stuck in oil leak hole and be difficult to cleaning, and in engine operation process, aluminium is considered lubricated oil to be worth doing and cleaned out and enter main oil gallery with lubricant oil, causes the movement parts inordinate wears such as bent axle, camshaft, piston.For the problems referred to above, the present invention changes position and the size of oil leak hole, increases the height dimension of oil leak hole, because aluminium bits diameter is about 5-8mm, oil leak hole height is that 9-10mm is greater than aluminium bits diameter, aluminium is considered to be worth doing and can not be stuck in oil leak hole place, be easy to cleaning, realize cylinder cap and clean clean requirement.
Referring to Fig. 1, engine cylinder cap 1 is provided with four groups of valve spring mounting holes, often group comprises four valve spring mounting holes 5, and for ensureing the guiding of valve spring, valve spring mounting hole is counterbore.The problem of lubricant oil is accumulated for solving valve spring mounting hole, the present invention has cast an oil unloading trough 6 at the side of each valve spring mounting hole, lubricant oil is flowed out from drain pan in time, avoid valve spring to evoke the lubricant oil accumulated in counterbore when pumping, thus reduce the generation of a large amount of mist of oil.
As an important improvement technology of the present invention, be that main oil gallery is improved to casting by the conventional method that machining is shaping, connecting bridge is also casting, and tappet hole is that after first casting, machining is shaping.The structure of main oil gallery is elongated hole, and diameter is at 5-8 millimeter, and length about 450 millimeters, directly casting Problems existing is: elongated main oil gallery sand core strength is too low, and is difficult to location.Although machining deep hole has a lot of problem, owing to not finding suitable casting method, therefore the main oil gallery of engine cylinder cap is all also adopt the method for machining to complete all the time.For the difficulty of main oil gallery casting, the method that the present invention takes is as follows: referring to Fig. 5-7, suitably increases the cross-section area of main oil gallery core 10, and to improve its intensity, main oil gallery core sectional dimension increases, and the sectional dimension of main oil gallery also increases naturally.Common main oil gallery is circular cross-section, and its diameter is at 5-8 millimeter.Main oil gallery is designed to long round section by the present invention, and namely main oil gallery core is all long round section, and the cross-sectional dimension longitudinal axis L of main oil gallery core 10 is 11 millimeters, and minor axis H is 7 millimeters.Like this, the size of main oil gallery core cross section is increased, and intensity increases.The long axis direction of main oil gallery long round section, along engine cylinder cap width direction, can not have influence on the overall structure of engine cylinder cap while main oil gallery cross-sectional dimension increases.The tappet hole of engine cylinder cap, while casting main oil gallery, is cast, and is cast out between main oil gallery with tappet hole and be communicated with the two connecting bridge by the present invention in the lump.From Fig. 5, Fig. 6, main oil gallery core 10 be arranged two in parallel, each bar main oil gallery core respectively through eight connecting bridge cores 12 and eight root elevator post holes cores 11 affixed, one end of each tappet hole core 11 is affixed with oil pocket core respectively.Said structure, the location of main oil gallery core is realized on the one hand by connecting bridge core and tappet hole core, multiple strong point that on the other hand main oil gallery core had, further increase its intensity, in addition, between tappet hole and main oil gallery, realize smooth transition by connecting bridge, decrease machining allowance, avoid because machining forms sharp edge, burr, make engine operation more smooth and easy.For improving the join strength of tappet hole core 11 and oil pocket core 9, tappet hole core 11 is Step Shaft shape, and the root diameter (RD) of tappet hole core and oil pocket core joint is comparatively large, is 9 millimeters; The diameter at tappet hole core small diameter place is 8 millimeters, is the working position of tappet hole after this minor diameter position casting.Adopt the inventive method, engine cylinder cap main oil gallery adopts one-step casting shaping, greatly reduces workload and the difficulty of machining, simplified processing process, without the need to deep hole processing equipment, reduces process time, thus reduces manufacture cost.Main oil gallery is communicated by connecting bridge with tappet hole, reduces the burr that course of working produces, to the scuffing of movement parts after avoiding burr to come off.
Claims (9)
1. an engine cylinder cap, it comprises two main oil gallerys, tappet hole, cylinder bolt platform and valve spring mounting hole, it is characterized in that, the cross section of described main oil gallery (2) is long-round-shape, this oblong long axis direction is along engine cylinder cap width direction, this oblong minor axis is along engine cylinder cap short transverse, and main oil gallery is communicated with tappet hole (4) through connecting bridge (3).
2. engine cylinder cap according to claim 1, is characterized in that, described connecting bridge and main oil gallery and tappet hole connection smooth transition.
3. engine cylinder cap according to claim 2, is characterized in that, described tappet hole (4) bottom is provided with oil leak hole (8), and oil leak hole opening deflection cylinder bolt platform (7) side, oil leak hole height dimension B is 9-10 millimeter.
4. engine cylinder cap according to claim 3, is characterized in that, the side edge of described valve spring mounting hole (5) is provided with oil unloading trough (6).
5. manufacture the method for engine cylinder cap as described in claim 1,2,3 or 4, it is characterized in that, described main oil gallery is formed by casting, and described tappet hole is by cast and machining forms, through by the connecting bridge of casting between main oil gallery and tappet hole.
6. the manufacture method of engine cylinder cap according to claim 5, it is characterized in that, cast casting sand core structure used and comprise oil pocket core (9), tappet hole core (11), connecting bridge core (12) and main oil gallery core (10), wherein, main oil gallery core be arranged two in parallel, each bar main oil gallery core respectively through eight connecting bridge cores and eight root elevator post holes cores affixed, one end of each tappet hole core is affixed with oil pocket core respectively.
7. the manufacture method of engine cylinder cap according to claim 6, it is characterized in that, described tappet hole core (11) is Step Shaft shape, and the diameter of tappet hole core root and oil pocket core connection part is larger.
8. the manufacture method of engine cylinder cap according to claim 7, it is characterized in that, described main oil gallery core cross section is long-round-shape, and its cross-sectional dimension longitudinal axis L is 11 millimeters, and minor axis H is 7 millimeters.
9. the manufacture method of engine cylinder cap according to claim 8, it is characterized in that, the diameter at described tappet hole core (11) larger diameter place is 9 millimeters, and the diameter at small diameter place is 8 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310262119.1A CN103306843B (en) | 2013-06-27 | 2013-06-27 | Engine cylinder head and processing method of main oil gallery tappet holes of engine cylinder head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310262119.1A CN103306843B (en) | 2013-06-27 | 2013-06-27 | Engine cylinder head and processing method of main oil gallery tappet holes of engine cylinder head |
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| Publication Number | Publication Date |
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| CN103306843A CN103306843A (en) | 2013-09-18 |
| CN103306843B true CN103306843B (en) | 2015-07-01 |
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| CN201310262119.1A Expired - Fee Related CN103306843B (en) | 2013-06-27 | 2013-06-27 | Engine cylinder head and processing method of main oil gallery tappet holes of engine cylinder head |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108035819A (en) * | 2017-12-04 | 2018-05-15 | 杨程日 | The wide arc gap side through hole of cylinder cover of automobile engine tappet bore |
| CN111974947B (en) * | 2019-05-21 | 2022-04-05 | 长城汽车股份有限公司 | Forming method of oil return channel of cylinder cover and cylinder cover with oil return channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100872640B1 (en) * | 2006-11-14 | 2008-12-09 | 현대자동차주식회사 | Oil supply structure for friction reduction of cam shaft |
| CN101344024B (en) * | 2008-08-22 | 2010-06-02 | 奇瑞汽车股份有限公司 | Engine with novel oilway |
| CN101482044B (en) * | 2008-12-22 | 2012-10-24 | 奇瑞汽车股份有限公司 | Engine camshaft bearing cover |
| CN101886583A (en) * | 2010-06-17 | 2010-11-17 | 重庆长安汽车股份有限公司 | Variable valve timing engine cylinder cover |
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Granted publication date: 20150701 |