CN103032193B - A kind of layer-stepping cylinder head - Google Patents
A kind of layer-stepping cylinder head Download PDFInfo
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- CN103032193B CN103032193B CN201110305172.6A CN201110305172A CN103032193B CN 103032193 B CN103032193 B CN 103032193B CN 201110305172 A CN201110305172 A CN 201110305172A CN 103032193 B CN103032193 B CN 103032193B
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- Prior art keywords
- cylinder head
- surface layer
- valve seat
- firepower
- firepower surface
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Abstract
The invention discloses a kind of layer-stepping cylinder head, comprising: cylinder head matrix and firepower surface layer, firepower surface layer is detachably arranged on the end face of described cylinder head matrix by fastening piece, is formed and be sealed and matched between described firepower surface layer and described cylinder head base end; Described firepower surface layer offers valve seat.The present invention is by arranging independently firepower surface layer, and valve seat is set on firepower surface layer, when after valve seat wearing and tearing, only need change firepower surface layer can repair, overcome inserted seat easily come off, arrange spatial requirement high, and monolithic cylinder head, once after certain valve seat place fret wear exceeds usage requirement on cylinder head, need the defect changing whole cylinder head.The high power of combustion motor, miniaturization have positive meaning.
Description
Technical field
The present invention relates to a kind of internal combustion engine component, particularly relate to a kind of cylinder head for internal-combustion piston engine.
Background technique
Engine valve-valve seat friction pair is one of main friction pairs of reciprocating engine, it is a kind of valve of machinery action, in order in time to open and close intake duct and air outlet flue in the working procedure of motor, what control fresh charge (fuel mixture or air) enters the discharge with waste gas.The working condition of Valve-valve seat friction pair in actual motion is very severe, and it weares and teares and damages the output power, service behaviour and the service life that directly affect motor.
The material being generally used for cylinder head manufacture is cast iron or aluminum alloy etc., because body material is softer, needs on matrix, inlay the air valve seat ring of hardness higher than body, is matched, reduce wear by valve with air valve seat ring, improves working life.After certain time limit, as excessively in air valve seat ring wear extent affect internal-combustion engine normal working, also by again inlaying air valve seat ring to repair.But this kind of design can cause air valve seat ring in engine working process to come off and enter firing chamber, and then occur that the phenomenon destroying motor occurs.Secondly change in air valve seat ring process, the dismounting of air valve seat ring and inlay need be stricter requirement, manufacturing efficiency is low.
Along with internal-combustion engine power per liter rises, the trend of volume miniaturization, combustion chambers of internal combustion engines (cylinder sleeve) bore reduces, but in order to improve inlet and outlet efficiency, needing to increase valve number, the increasing inlet and outlet shop front is amassed.It is comparatively difficult that the valve number of limited section of combustion chamber, increase and valve area make to inlay air valve seat ring at cylinder head fire power face place.For this reason, in part motor, those skilled in the art eliminates air valve seat ring and inlays, adopt Integral cylinder head (namely direct on cylinder head body material machine shaping valve seat), the rear valve seat place utilizing the means pair such as high-frequency electric field, laser, electron beam and other high energy beam currents to coordinate with valve carries out localized quench hardening, strengthening, improve valve seat hardness, reach wear-resistant object.The air cylinder head structure of such design is simple, but once after on cylinder head, certain valve seat place fret wear exceeds usage requirement, need to change whole cylinder head, cost is high, and waste of material is serious.
Summary of the invention
For prior art Problems existing, the object of the present invention is to provide a kind of layer-stepping cylinder head, a kind of layer-stepping cylinder head, after certain valve seat place fret wear exceeds usage requirement on cylinder head, do not need to change whole cylinder head.
A kind of layer-stepping cylinder head of the present invention comprises: cylinder head matrix and firepower surface layer, and firepower surface layer is detachably arranged on the end face of described cylinder head matrix by fastening piece, is formed and be sealed and matched between described firepower surface layer and described cylinder head base end; Described firepower surface layer also offers valve seat.
Because the present invention is by the design proposal of layered combination, can be implemented in firepower surface layer and base layer uses different materials or processing mode, thus the performance of each material can be given full play to, on firepower surface layer:
Described firepower surface layer can be greater than matrix by the own hardness such as cemented carbide, pottery and make with the material that valve hardness matches;
When described firepower surface layer use material hardness to be less than situation about matching with valve hardness time, can by carrying out local strengthening at valve seat place, improve valve seat zone hardness, to reach usage requirement;
When described firepower surface layer use material hardness to be less than situation about matching with valve hardness time, because firepower surface layer is separated with matrix phase, integral quenching strengthening can also be carried out to firepower surface layer, improve integral hardness, thus suppress valve seat place wearing and tearing.For local strengthening, the technique of integral quenching is simple, and efficiency is higher, and cost of production also will reduce.
The present invention is by arranging independently firepower surface layer, and valve seat is set on firepower surface layer, when after valve seat wearing and tearing, only need change firepower surface layer can repair, overcome inserted seat easily come off, arrange spatial requirement high, and monolithic cylinder head, once after certain valve seat place fret wear exceeds usage requirement on cylinder head, need the defect changing whole cylinder head.The high power of combustion motor, miniaturization have positive meaning.
Accompanying drawing explanation
Fig. 1 is layer-stepping cylinder head embodiment 1 structural representation of the present invention;
Fig. 2 is the decomposition texture schematic diagram of Fig. 1;
Fig. 3 is the embodiment of the present invention 2 structural representation;
Fig. 4 is the decomposition texture schematic diagram of Fig. 3.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1: Fig. 1 is layer-stepping cylinder head embodiment 1 structural representation of the present invention, and Fig. 2 is the decomposition texture schematic diagram of Fig. 1.As shown in Figure 1, 2, it is made up of firepower surface layer 1 and matrix 2 two-part, and both materials are all vermicular cast iron Ru-300, superficial hardness number HV200, nodulizing rate 80%, content of pearlite in alloy 40%, ferrite content 60%.Material chemical composition is as shown in table 1.Firepower surface layer 1 is processed valve seat 3.Valve diameter 42mm, utilize laser to carry out quenching strengthening to valve seat 3, surface hardness is increased to HV400, and the depth of quenching reaches 1mm.The fitting surface 4 of firepower surface layer 1 and base layer 2 is through milling machine finish-milling or grinding machine, and roughness is less than 1.6 μm, after be connected with engine body through the bolt hole 5 of cylinder head surrounding by stud, ensure that its fitting surface does not leak gas, water leakage phenomenon generation.
Embodiment 2: Fig. 3 is layer-stepping cylinder head embodiment 1 structural representation of the present invention, and Fig. 4 is the decomposition texture schematic diagram of Fig. 3.As shown in Figure 3,4, it is made up of firepower surface layer 1, sealing layer 6 and base layer 2, and firepower surface layer 1 and matrix 2 material are vermicular cast iron Ru-300.Sealing layer 6 is copper sheet, through impact briquetting, has prevented from leaking and gas leak phenomenon generation.Firepower surface layer 1 is processed valve seat 3.Valve seat 3 diameter 42mm, utilize laser to carry out quenching strengthening to valve seat 3, surface hardness is increased to HV400, and the depth of quenching reaches 1mm.The fitting surface 4 of firepower surface layer 1 and matrix 2 is through milling machine finish-milling or grinding machine, and roughness is less than 1.6 μm, after be connected with engine body through the bolt hole 6 of cylinder head surrounding by stud, guarantee that its fitting surface is without leaking gas, leaking.
Table 1RuT-300 chemical composition (wt.-%)
It is to be noted the situation of the separate cylinder head only listing the corresponding cylinder head of a cylinder in above embodiment and accompanying drawing, but the present invention is equally applicable to the Integral cylinder head that several cylinder shares a cylinder head; The firepower surface layer of indication of the present invention, can be the corresponding one piece of firepower surface layer of a cylinder, also can be the firepower surface layer that several cylinder shares an one; The sealing layer of indication of the present invention, can be the corresponding layer sealing together of a cylinder, also can be the sealing layer that several cylinder shares an one.In any distortion that the specific embodiment of the present invention is made, all do not depart from the scope of spirit of the present invention and claim record yet.
Claims (1)
1. a layer-stepping cylinder head, is characterized in that, comprising: cylinder head matrix and firepower surface layer;
Firepower surface layer is detachably arranged on the end face of described cylinder head matrix by fastening piece, is formed and be sealed and matched between described firepower surface layer and described cylinder head base end; The fitting surface of firepower surface layer and matrix is through milling machine finish-milling or grinding machine, and roughness is less than 1.6um, after be connected with motor matrix through the bolt hole of cylinder head surrounding by stud;
Described firepower surface layer offers valve seat;
When described firepower surface layer use material hardness to be less than situation about matching with valve hardness time, integral quenching strengthening is carried out to described firepower surface layer, improves valve seat zone hardness, thus suppress the wearing and tearing at valve seat place;
Also be provided with sealing layer between described firepower surface layer and described cylinder head base end, sealing layer is copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110305172.6A CN103032193B (en) | 2011-10-10 | 2011-10-10 | A kind of layer-stepping cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110305172.6A CN103032193B (en) | 2011-10-10 | 2011-10-10 | A kind of layer-stepping cylinder head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103032193A CN103032193A (en) | 2013-04-10 |
| CN103032193B true CN103032193B (en) | 2015-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110305172.6A Expired - Fee Related CN103032193B (en) | 2011-10-10 | 2011-10-10 | A kind of layer-stepping cylinder head |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447524A (en) * | 2013-09-19 | 2013-12-18 | 安徽白兔湖动力有限公司 | Powder metallurgy valve seat ring and production method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1803520A1 (en) * | 2005-12-09 | 2007-07-04 | Hydro Aluminium Mandl&Berger GMBH | Cylinder head made out of at least two precast sections and method for its manufacture |
| CN101881235A (en) * | 2009-04-22 | 2010-11-10 | 通用汽车环球科技运作公司 | The cylinder head assembly and the manufacture method thereof that are used for internal-combustion engine |
| CN101994596A (en) * | 2009-08-03 | 2011-03-30 | 通用汽车环球科技运作公司 | Cylinder head assembly for internal combustion engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPP581098A0 (en) * | 1998-09-11 | 1998-10-01 | Ecotrans Pty. Limited | Engine conversions |
| JP2009243401A (en) * | 2008-03-31 | 2009-10-22 | Honda Motor Co Ltd | Cylinder head structure in four-cycle engine |
| CN201671708U (en) * | 2010-05-20 | 2010-12-15 | 苏州市双马机电有限公司 | Improved housing structure of diesel engine |
-
2011
- 2011-10-10 CN CN201110305172.6A patent/CN103032193B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1803520A1 (en) * | 2005-12-09 | 2007-07-04 | Hydro Aluminium Mandl&Berger GMBH | Cylinder head made out of at least two precast sections and method for its manufacture |
| CN101881235A (en) * | 2009-04-22 | 2010-11-10 | 通用汽车环球科技运作公司 | The cylinder head assembly and the manufacture method thereof that are used for internal-combustion engine |
| CN101994596A (en) * | 2009-08-03 | 2011-03-30 | 通用汽车环球科技运作公司 | Cylinder head assembly for internal combustion engine |
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| CN103032193A (en) | 2013-04-10 |
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Granted publication date: 20151014 Termination date: 20201010 |