CN107630761B - Cast-in type burr cylinder sleeve and manufacturing method thereof - Google Patents
Cast-in type burr cylinder sleeve and manufacturing method thereof Download PDFInfo
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- CN107630761B CN107630761B CN201710613233.2A CN201710613233A CN107630761B CN 107630761 B CN107630761 B CN 107630761B CN 201710613233 A CN201710613233 A CN 201710613233A CN 107630761 B CN107630761 B CN 107630761B
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Abstract
The invention relates to a cast-in type burr cylinder sleeve and a manufacturing method thereof, wherein mushroom-shaped burrs are arranged outside a cylinder sleeve body, after aluminum water is cast in a subsequent cylinder body, the combination performance of the cast-in type burr cylinder sleeve and an engine is obviously improved, the cast-in type burr cylinder sleeve is peeled off by strong external force, the excircle bulge of the cast-in type burr cylinder sleeve is still remained in the cylinder body, and the heat conduction performance of the cast-in type burr cylinder sleeve is also obviously improved. During casting, a special release agent is adopted, so that burrs are not easily oxidized, the combination of the subsequent cast-in type burr cylinder sleeve and an engine is not influenced, and the yield of the cast-in type burr cylinder sleeve can reach 94%.
Description
Technical Field
The invention relates to the technical field of automobile cylinder liners, in particular to a cast-in type burr cylinder liner and a manufacturing method thereof.
Background
The cylinder sleeve is simply called cylinder sleeve, which is embedded in the cylinder barrel of the cylinder body and forms a combustion chamber together with the piston and the cylinder cover. The cylinder liners are classified into dry cylinder liners and wet cylinder liners. The cylinder sleeve with the back surface not contacted with the cooling water is called a dry cylinder sleeve, and the cylinder sleeve with the back surface contacted with the cooling water is a wet cylinder sleeve. The dry cylinder sleeve has the advantages of small thickness, simple structure and convenient processing. The wet cylinder sleeve directly contacts with cooling water, so that the cooling of the engine is facilitated, and the engine is small and light.
The existing burr type cylinder sleeve has mechanical combination with a subsequent cylinder body, has no advantages of outer circle surface machining cost and the like, has a use ratio of more than 50% in the market at present, and has a very wide use prospect. However, the burrs cause more waste products generated in the demolding process, particularly, sharp burrs are easily oxidized, and in addition, the residual refractory coating is embedded and reserved to influence the subsequent combination with the cylinder body, so that the rate of finished products of the burr type cylinder sleeve is severely limited, and the rate of finished products of the existing burr type cylinder sleeve is not more than 85%.
Disclosure of Invention
The invention provides a cast-in type burr cylinder sleeve and a manufacturing method thereof aiming at the defects in the prior art, and the specific technical scheme is as follows:
the cast-in type burr cylinder sleeve comprises a cylinder sleeve body, wherein mushroom-shaped burrs are arranged outside the cylinder sleeve body.
As an improvement of the technical scheme, the burrs and the cylinder sleeve body are integrally cast and formed.
A manufacturing method of a cast-in type burr cylinder sleeve comprises the steps of coating a protective layer on the inner wall of a mold by using a release agent, melting cast iron into molten iron, pouring the molten iron into the mold, casting and molding by adopting a centrifugal casting method, cooling to room temperature, breaking the mold, and demolding to obtain the cast-in type burr cylinder sleeve.
As an improvement of the technical scheme, the preparation method of the release agent comprises the steps of heating and stirring 26 ~ 30 parts by weight of palm wax, 12 ~ 16 parts by weight of silicone resin, 2.3 ~ 2.6.6 parts by weight of zinc stearate, 6.3 ~ 6.8.8 parts by weight of sodium borohydride, 5.6 ~ 5.8.8 parts by weight of nickel sulfide powder and 80 ~ 85 parts by weight of methanol at 95 ~ 100 ℃, introducing nitrogen protection gas during stirring, cooling to room temperature after stirring for 10 ~ 15 minutes, and emulsifying for 2 ~ 3 hours by using a high-shear homogeneous emulsifying machine at 1000 ~ 3000r/min to obtain the release agent.
As an improvement of the technical scheme, the particle size of the nickel sulfide powder is less than 50 microns.
The invention has the beneficial technical effects that: the mushroom-shaped burrs are arranged outside the cylinder sleeve body, after aluminum water is cast in a subsequent cylinder body, the combination performance of the cast-in type burr cylinder sleeve and an engine is remarkably improved, the cast-in type burr cylinder sleeve is peeled off by strong external force, the excircle bulge of the cast-in type burr cylinder sleeve is still remained in the cylinder body, and the heat conduction performance of the cast-in type burr cylinder sleeve is also remarkably improved. The special release agent is adopted, so that burrs are not easily oxidized, the combination of the subsequent cast-in type burr cylinder sleeve and an engine is not influenced, and the yield of the cast-in type burr cylinder sleeve can reach 94%.
Drawings
FIG. 1 is a schematic view of a cast-in type burr cylinder liner structure according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the cast-in type burr cylinder sleeve comprises a cylinder sleeve body 1, wherein mushroom-shaped burrs 11 are arranged outside the cylinder sleeve body 1; the burr 11 and the cylinder sleeve body 1 are integrally cast and formed.
Example 1
1) Heating and stirring 26Kg of palm wax, 12Kg of silicone resin, 2.3Kg of zinc stearate, 6.3Kg of sodium borohydride, 5.6Kg of nickel sulfide powder with the particle size of less than 50 microns and 80Kg of methanol at 95 ℃, introducing nitrogen gas for protection during stirring, cooling to room temperature after stirring for 10 minutes, and emulsifying for 2 hours by using a high-shear homogenizing emulsifying machine under the condition of 1000r/min to obtain the release agent.
2) And coating a protective layer on the inner wall of the mold by using a release agent, melting cast iron into molten iron, pouring the molten iron into the mold, casting and molding by adopting a centrifugal casting method, cooling to room temperature, and knocking the mold to break to finish demolding to obtain the cast-in type burr cylinder sleeve. The yield of the cast-in type burr cylinder sleeve is more than 92.6 percent.
Example 2
1) Heating and stirring 28Kg of palm wax, 15Kg of silicone resin, 2.5Kg of zinc stearate, 6.5Kg of sodium borohydride, 5.7Kg of nickel sulfide powder with the particle size of less than 50 microns and 83Kg of methanol at 99 ℃, introducing nitrogen gas for protection during stirring, cooling to room temperature after stirring for 12 minutes, and emulsifying for 2.5 hours by using a high-shear homogenizing and emulsifying machine under the condition of 2000r/min to obtain the release agent.
2) And coating a protective layer on the inner wall of the mold by using a release agent, melting cast iron into molten iron, pouring the molten iron into the mold, casting and molding by adopting a centrifugal casting method, cooling to room temperature, and knocking the mold to break to finish demolding to obtain the cast-in type burr cylinder sleeve. The yield of the cast-in type burr cylinder sleeve is more than 94.1%.
Example 3
1) 30Kg of palm wax, 16Kg of silicone resin, 2.6Kg of zinc stearate, 6.8Kg of sodium borohydride, 5.8Kg of nickel sulfide powder with the particle size less than 50 microns and 85Kg of methanol are heated and stirred at 100 ℃, nitrogen protective gas is introduced during stirring, the temperature is reduced to room temperature after stirring for 15 minutes, and then the mixture is emulsified for 2 hours by a high-shear homogenizing and emulsifying machine under the condition of 3000r/min to obtain the release agent.
2) And coating a protective layer on the inner wall of the mold by using a release agent, melting cast iron into molten iron, pouring the molten iron into the mold, casting and molding by adopting a centrifugal casting method, cooling to room temperature, and knocking the mold to break to finish demolding to obtain the cast-in type burr cylinder sleeve. The yield of the cast-in type burr cylinder sleeve is more than 91.9%.
In the above embodiment, the inner walls of the mold are provided with the female cavities matched with the burrs 11, and when the cast-in type burr cylinder liner is cast, molten iron is filled into the female cavities, and the burrs 11 are formed after cooling.
The casting mold is cast and molded by adopting a centrifugal casting method, because the molten iron can be well filled in the radial direction by centrifugal motion and the free surface of the casting is formed, the burr 11 is easier to mold, the combined burr 11 is mushroom-shaped, namely the head of the burr 11 is large in volume, which not only is beneficial to removing gas in the molten iron, but also ensures that the structure of the burr 11 is more compact and the mechanical property of the burr 11 is more excellent. Due to the existence of the mushroom-shaped burrs 11, after the cast-in type burr cylinder sleeve is used for casting molten aluminum in a subsequent cylinder body, the combination performance of the cast-in type burr cylinder sleeve and an engine is very good, the cast-in type burr cylinder sleeve is peeled off by strong external force, and the excircle bulge of the cast-in type burr cylinder sleeve is still remained in the cylinder body. The presence of the burr 11 significantly improves the thermal conductivity of the cast-in burr cylinder liner due to the tip heat dissipation effect.
The release agent consists of palm wax, silicone resin, zinc stearate, sodium borohydride, nickel sulfide powder and methanol, and has better smoothness and stability. The palm wax and the silicone resin can improve the foam pores, and have the characteristics of uniform foam pore distribution, stable size, high demolding frequency, small pollution to the mold and the like. Zinc stearate is used as a dispersing agent, methanol is used as a solvent, and sodium borohydride is reductive and can effectively reduce the oxidation degree of the burrs 11; the nickel sulfide powder has excellent reduction performance, and in the process of preparing the release agent, the reason that the nitrogen protective gas is used is to prevent nickel sulfide from being oxidized at high temperature, and the nickel sulfide is heated to be reduced and then cooled to expand, so that the stress generated between the burr 11 and the cylinder sleeve body 1 in the centrifugal casting process can be partially buffered by the protective layer, the generation of microcracks due to overlarge stress is avoided, and the subsequent yield is improved; after demolding is carried out, because the temperature is room temperature, cooling expansion of nickel sulfide and cooling shrinkage of other materials conflict, cracks are formed on a protective layer between the burr 11 and the mold, the protective layer is cleaned from the surface of the burr 11, casting defects are likely to be generated on the whole outer circle, so that more waste products are produced, particularly, sharp burrs are easily oxidized, and in addition, residual refractory paint is embedded and reserved to influence the subsequent combination with the cylinder body, so that the subsequent combination with the cylinder body is not influenced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. A cast-in type burr cylinder sleeve comprises a cylinder sleeve body and is characterized in that mushroom-shaped burrs are arranged on the outer portion of the cylinder sleeve body, the burrs and the cylinder sleeve body are integrally cast and molded, a release agent is coated on the inner wall of a mold, then cast iron is melted into molten iron, the molten iron is poured into the mold, the mold is cast and molded by a centrifugal casting method, after the molten iron is cooled to room temperature, the mold is broken and demolded, and the cast-in type burr cylinder sleeve is obtained.
2. The manufacturing method of the cast-in type burr cylinder sleeve as claimed in claim 1, characterized in that: the particle size of the nickel sulfide powder is less than 50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710613233.2A CN107630761B (en) | 2017-07-25 | 2017-07-25 | Cast-in type burr cylinder sleeve and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710613233.2A CN107630761B (en) | 2017-07-25 | 2017-07-25 | Cast-in type burr cylinder sleeve and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN107630761A CN107630761A (en) | 2018-01-26 |
| CN107630761B true CN107630761B (en) | 2020-01-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2576980Y (en) * | 2002-10-29 | 2003-10-01 | 河南省中原内配股份有限公司 | Cylinder jacket with uniform-distruting burrs of outer diameter |
| CN202192255U (en) * | 2011-09-06 | 2012-04-18 | 滨州盟威斯林格缸套有限公司 | Automatic pouring truck for burr cylinder jacket |
| CN103817285A (en) * | 2014-01-15 | 2014-05-28 | 周家荣 | Coating capable of forming mushroom-shaped burrs during centrifugal casting of engine cylinder sleeve |
| CN106553297A (en) * | 2016-10-20 | 2017-04-05 | 沈阳化工大学 | A kind of palm wax and silicones Compositional type high-rebound polyurethane foaming product releasing agent |
-
2017
- 2017-07-25 CN CN201710613233.2A patent/CN107630761B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2576980Y (en) * | 2002-10-29 | 2003-10-01 | 河南省中原内配股份有限公司 | Cylinder jacket with uniform-distruting burrs of outer diameter |
| CN202192255U (en) * | 2011-09-06 | 2012-04-18 | 滨州盟威斯林格缸套有限公司 | Automatic pouring truck for burr cylinder jacket |
| CN103817285A (en) * | 2014-01-15 | 2014-05-28 | 周家荣 | Coating capable of forming mushroom-shaped burrs during centrifugal casting of engine cylinder sleeve |
| CN106553297A (en) * | 2016-10-20 | 2017-04-05 | 沈阳化工大学 | A kind of palm wax and silicones Compositional type high-rebound polyurethane foaming product releasing agent |
Non-Patent Citations (1)
| Title |
|---|
| 浅析毛刺缸套铸态纹理表面的控制;赵春芝;《内燃机配件》;20090825(第4期);第22、26页 * |
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| CN107630761A (en) | 2018-01-26 |
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