WO2016079328A1 - Verfahren zum herstellen eines kühlkanalkolbens sowie nach einem derartigen verfahren hergestellter kühlkanalkolben - Google Patents
Verfahren zum herstellen eines kühlkanalkolbens sowie nach einem derartigen verfahren hergestellter kühlkanalkolben Download PDFInfo
- Publication number
- WO2016079328A1 WO2016079328A1 PCT/EP2015/077280 EP2015077280W WO2016079328A1 WO 2016079328 A1 WO2016079328 A1 WO 2016079328A1 EP 2015077280 W EP2015077280 W EP 2015077280W WO 2016079328 A1 WO2016079328 A1 WO 2016079328A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- salt
- salt core
- cooling channel
- core blank
- surface roughness
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/105—Salt cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
- B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
- E02F3/22—Component parts
-
- 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
- F02F3/16—Pistons having cooling means
-
- 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
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
-
- 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
- F02F3/28—Other pistons with specially-shaped head
-
- 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
- F02F2200/06—Casting
- F02F2200/08—Casting using a lost model, e.g. foam casting
Definitions
- the present invention relates to a method for producing a cooling channel piston and a cooling channel piston produced by such a method.
- Salt cores are used in particular for the production of cast pistons with a closed cooling channel. After pouring the flask, the salt core is removed from the flask in a manner known per se by dissolving it with water. Such salt cores are usually prepared on the basis of sodium chloride. For this purpose, a green compact is produced by cold pressing of the material, which has a shape similar to the cooling channel and this sintered at about 800 ° C just below the melting point of the material. If necessary, the resulting sintered component can be brought into the final shape corresponding to the cooling channel to be produced by mechanical post-processing.
- the resulting salt core generally has a surface roughness R z of 30 ⁇ to 60 ⁇ .
- R z surface roughness
- WO 2010/133596 A2 a method for producing a salt core with a particularly smooth surface is known. This is to prevent that during the casting of a component of the casting material penetrates into the surface of the salt core or reacts with the salt core.
- the object of the present invention is to provide a method for producing a piston and a piston, which ensures a particularly effective heat transfer between the piston material and the cooling oil circulating in the cooling channel.
- a first solution consists in a method having the following features: a) producing a salt core blank by means of pressing and sintering a pure salt material having a surface roughness R z of at most 60 ⁇ m; b) immersing the salt core blank in a saturated solution of the salt material or spraying the salt core blank with a saturated solution of the salt material; c) drying the salt core blank to a salt core having a surface roughness R z of at least 20 ⁇ ; d) inserting the salt core in a casting mold and casting a cooling channel piston of a metallic casting material.
- a second solution consists in a method having the following features: e) producing a salt core blank by means of pressing and sintering a pure salt material having a surface roughness R z of at most 60 ⁇ m; f) immersing the salt core blank in a solvent or a solution of the salt material or spraying the salt core blank with a solvent or a solution of the salt material; g) sprinkling the salt core blank with a salt material having a defined particle size distribution and / or a defined grain diameter distribution; h) drying the salt core blank to a salt core having a surface roughness R z of at least 20 ⁇ ; i) inserting the salt core into a casting mold and casting a cooling channel piston of a metallic casting material.
- the subject matter of the present invention is furthermore a piston that can be produced by such a method.
- the inventive method is characterized in that a defined surface roughness of the salt core can be achieved, which is greater than in salt cores, which are produced in the usual sintering process.
- the object according to the invention is achieved by crystallizing out the salt material from the saturated salt solution in step c), depositing the crystals on the sintered surface of the salt core blank and firmly adhering to the loosened surface of the salt core blank.
- the salt crystals applied to the surface of the salt core blank by the process according to claim 1 furthermore act as crystallization nuclei during the subsequent drying of the salt core blank, so that the salt crystals precipitating from the saturated aqueous solution crystallize particularly effectively on the salt grains and a particularly large surface roughness results.
- the object of the invention is achieved in that the surface of the blank by means of a suitable solvent or a solution of the salt material dissolved and then sprinkled the still wet surface with additional crystals of the salt material with a defined particle size and / or grain diameter distribution become. These crystals are stored in the loosened surface of the salt core blank and adhere firmly.
- the inventive method is technically easy to implement and can be easily integrated into existing production lines.
- the inventive method has the further advantage that no foreign substances or additives are needed. These can considerably complicate the release of the salt core after the casting of the piston. Furthermore, they can lead to gas release during the casting of the piston. By eliminating foreign substances or additives, damage to the cooling channel surface (for example due to hydrogen porosity) is avoided. In particular, can be dispensed with the use of any adhesives that can cause gas leakage and thus blistering in the cast component.
- a proven salt material in the form of sodium chloride is used in step a) or in step e).
- the salt core blank can be subjected to a mechanical finishing in order to produce as exact a contour as possible of the cooling channel to be produced.
- the salt core blank should preferably be dried in agitated air and at a maximum temperature of 200 ° C. until no more moisture escapes.
- the salt core blank is dried very gently at a temperature of at most 100 ° C, more preferably drying takes place at room temperature.
- a salt core can be obtained with a surface roughness of up to 1 mm, depending on the final size of crystallized according to the method of claim 1 salt crystals or depending on the size of according to step g) in addition to Sprinkling the salt core blank used salt crystals.
- step a) and before step b) the salt core blank is heated to a temperature of 80 ° C. to 100 ° C. in order to obtain a particularly effective wetting by the aqueous saturated salt solution according to the method of claim 1.
- the salt core according to the invention obtained before being placed in the mold according to step d) or step i) can be heated to a temperature of 300 ° C to 500 ° C in order to avoid an excessive temperature difference to the casting material used.
- the inventive method is particularly suitable for producing cooling channel piston made of a material based on aluminum, in particular an aluminum-silicon casting alloy.
- Figure 1 shows an embodiment of a cooling channel piston according to the invention in section
- FIG. 2 shows an embodiment of a salt core used for the production of a cooling channel piston according to Figure 1 in section.
- FIG. 1 shows by way of example a one-piece cast cooling channel piston 10.
- the cooling channel piston 10 has a piston head 1 1 with a piston head 12, in which a combustion bowl 13 is introduced.
- the piston head 1 1 also has a land 14 and a ring portion 15 with annular grooves for receiving piston rings (not shown).
- the piston is provided at the level of the ring section 15 with a circumferential cooling channel 16.
- the piston also has, in a manner known per se, a piston shaft 17 with piston hubs 18, which are provided with hub bores 19 for receiving a piston pin (not shown).
- the piston hubs 18 are connected in a conventional manner via treads 21 with each other.
- the circumferential cooling channel 16 has a surface with a surface roughness R z of at least 200 ⁇ m, preferably of up to 400 ⁇ m, particularly preferably of up to 1 mm.
- FIG. 2 shows a salt core 30 made of sodium chloride for use in the production of the cooling channel piston 10 according to FIG. 1 according to the invention.
- the salt core 30 has a salt core blank 31, the surface 32 of which is coated with salt crystals 33 of sodium chloride.
- the salt core 30 can be produced in a first embodiment as follows:
- the salt core blank 31 is prepared in a conventional manner by cold pressing and sintering a salt material such as sodium chloride. Care must be taken that the pure salt material, i. a salt material containing no foreign substances or additives is used.
- the salt core blank 31 can be mechanically finished after sintering on its surface 32 in a known manner to obtain a cross-sectional contour that corresponds as closely as possible to the cross-sectional contour of the cooling channel to be produced.
- the finished salt core blank 31 is dipped or sprayed with a saturated aqueous solution of the salt material, in the exemplary embodiment sodium chloride, so that its surface 32 is wetted by the solution. Subsequently, the salt core blank 31 is dried, for example. In an oven at a temperature of just below 100 ° C, for example. 95 ° C to 98 ° C, until no more steam exits the salt core blank. During drying, salt crystals 33 crystallize out of the saturated solution and adhere to the surface 32 of the salt core blank 31.
- a saturated aqueous solution of the salt material in the exemplary embodiment sodium chloride
- a finished salt core 30 is present, which is characterized by a surface roughness R z of at least 200 ⁇ .
- the salt core 30 is inserted in a conventional manner in a corresponding mold and cast with a metallic material, for example. On the basis of aluminum. After completion of the casting process is a piston blank with cast salt core 30 before. Of the Piston raw ling is finished in a known manner, and the salt core 30 rinsed with water. The result is the cooling channel piston 10 according to FIG. 1.
- a modification of this method is that the salt core blank 31 is heated to a temperature of 80 ° C to 100 ° C prior to immersion in the saturated solution to obtain a particularly effective wetting of the surface 32 of the salt core blank 31 by the saturated solution.
- the salt core 30 can be made as follows:
- a salt core blank 31 is produced as described above. This is sprayed with a suitable solvent, preferably water or with a solution of the salt material, preferably sodium chloride or immersed in the liquid in question. Subsequently, the still wet surface of the salt core blank 31 is sprinkled with crystals of the salt material, sodium chloride in the exemplary embodiment, and then dried and reused as described.
- the grains used have a defined particle size distribution and / or a defined particle diameter distribution.
- the surface roughness R z of the salt core 30 can be set particularly accurately.
- a surface roughness R z of the surface of the cooling channel 16 of the finished cooling channel bulb 10 could be measured from 200 ⁇ m to 400 ⁇ m.
- Salt crystals with a mean grain diameter of 1 mm gave a surface roughness R z of the surface of the cooling channel 16 of the finished cooling channel piston 10 from 700 ⁇ to 900 ⁇ .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017526654A JP2017536238A (ja) | 2014-11-20 | 2015-11-20 | 冷却チャンネルピストンの製造方法とその方法により製造された冷却チャンネルピストン |
| US15/528,278 US20170320129A1 (en) | 2014-11-20 | 2015-11-20 | Method for producing a cooling channel piston and cooling channel piston produced by such a method |
| KR1020177013165A KR20170085509A (ko) | 2014-11-20 | 2015-11-20 | 냉각 채널 피스톤을 제조하기 위한 방법 및 이러한 방법에 의해 제조된 냉각 채널 피스톤 |
| CN201580062151.2A CN107107169A (zh) | 2014-11-20 | 2015-11-20 | 生产冷却通道活塞的方法和由该方法生产的冷却通道活塞 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014017091.8 | 2014-11-20 | ||
| DE102014017091.8A DE102014017091A1 (de) | 2014-11-20 | 2014-11-20 | Verfahren zum Herstellen eines Kühlkanalkolbens sowie nach einem derartigen Verfahren hergestellter Kühlkanalkolben |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016079328A1 true WO2016079328A1 (de) | 2016-05-26 |
Family
ID=54705165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2015/077280 Ceased WO2016079328A1 (de) | 2014-11-20 | 2015-11-20 | Verfahren zum herstellen eines kühlkanalkolbens sowie nach einem derartigen verfahren hergestellter kühlkanalkolben |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20170320129A1 (de) |
| JP (1) | JP2017536238A (de) |
| KR (1) | KR20170085509A (de) |
| CN (1) | CN107107169A (de) |
| DE (1) | DE102014017091A1 (de) |
| WO (1) | WO2016079328A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112427605A (zh) * | 2020-11-27 | 2021-03-02 | 山东进化者新材料有限公司 | 一种异形水溶性盐芯及制作方法与应用 |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017205804A1 (de) | 2017-04-05 | 2018-10-11 | Mahle International Gmbh | Kolben einer Brennkraftmaschine |
| CN108339942B (zh) * | 2018-04-28 | 2020-01-10 | 安徽工业大学 | 一种水溶型芯的微波固化成型系统 |
| CN108555226B (zh) * | 2018-04-28 | 2020-01-07 | 安徽工业大学 | 一种水溶型芯的添加剂的制备方法 |
| CN108500216B (zh) * | 2018-04-28 | 2020-01-03 | 安徽工业大学 | 一种红外线预固化水溶型芯的快速成形方法 |
| CN108380825B (zh) * | 2018-04-28 | 2020-01-10 | 安徽工业大学 | 一种微波固化水溶盐芯的快速成形方法 |
| CN108515147B (zh) * | 2018-04-28 | 2020-01-10 | 安徽工业大学 | 一种红外线预固化水溶盐芯的快速成形方法 |
| CN108500201B (zh) * | 2018-04-28 | 2020-01-10 | 安徽工业大学 | 一种水溶型芯的添加剂及其使用方法 |
| CN108296449B (zh) * | 2018-04-28 | 2020-01-10 | 安徽工业大学 | 一种水溶盐芯的微波固化成形系统 |
| CN108500215B (zh) * | 2018-04-28 | 2020-02-07 | 安徽工业大学 | 一种微波固化水溶型芯的快速成形方法 |
| CN110057859A (zh) * | 2019-03-18 | 2019-07-26 | 昆明理工大学 | 一种活塞内冷油道振荡传热性能的模拟装置及试验方法 |
| JP2021098212A (ja) * | 2019-12-23 | 2021-07-01 | トヨタ自動車株式会社 | 塩中子の製造方法 |
| CN116274878B (zh) * | 2023-03-03 | 2024-07-30 | 九牧厨卫股份有限公司 | 一种盐芯材料、钛合金铸造用盐芯及其制备方法 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008028197A1 (de) * | 2008-06-12 | 2009-12-17 | Mahle International Gmbh | Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010029077A1 (de) | 2009-05-18 | 2010-11-25 | Ceramtec Ag | Kerne auf der Basis von Salz mit behandelter Oberfläche |
-
2014
- 2014-11-20 DE DE102014017091.8A patent/DE102014017091A1/de not_active Withdrawn
-
2015
- 2015-11-20 CN CN201580062151.2A patent/CN107107169A/zh active Pending
- 2015-11-20 WO PCT/EP2015/077280 patent/WO2016079328A1/de not_active Ceased
- 2015-11-20 JP JP2017526654A patent/JP2017536238A/ja active Pending
- 2015-11-20 KR KR1020177013165A patent/KR20170085509A/ko not_active Withdrawn
- 2015-11-20 US US15/528,278 patent/US20170320129A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008028197A1 (de) * | 2008-06-12 | 2009-12-17 | Mahle International Gmbh | Kolben für einen Verbrennungsmotor und Verfahren zu seiner Herstellung |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112427605A (zh) * | 2020-11-27 | 2021-03-02 | 山东进化者新材料有限公司 | 一种异形水溶性盐芯及制作方法与应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014017091A1 (de) | 2016-05-25 |
| US20170320129A1 (en) | 2017-11-09 |
| KR20170085509A (ko) | 2017-07-24 |
| CN107107169A (zh) | 2017-08-29 |
| JP2017536238A (ja) | 2017-12-07 |
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