CN110551930A - Processing technology of refrigerator foaming die casting - Google Patents
Processing technology of refrigerator foaming die casting Download PDFInfo
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- CN110551930A CN110551930A CN201910956754.7A CN201910956754A CN110551930A CN 110551930 A CN110551930 A CN 110551930A CN 201910956754 A CN201910956754 A CN 201910956754A CN 110551930 A CN110551930 A CN 110551930A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D35/00—Equipment for conveying molten metal into beds or moulds
- B22D35/04—Equipment for conveying molten metal into beds or moulds into moulds, e.g. base plates, runners
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a processing technology of a refrigerator foaming die casting, which relates to the field of refrigerator foaming die castings and specifically comprises the following steps: (S1) compounding, (S2) melting, (S3) stirring, (S4) refining, (S5) casting, and (S6) heat treatment. According to the processing technology of the refrigerator foaming die casting, in the casting process, the molten material is led in from the middle of the crystallizer firstly and then is led in from the outer side in a spiral mode in sequence, the speed is high to low, so that the solution can be led in more uniformly, the solution is not easy to overflow, and the waste of the solution is avoided; in the heat treatment process, the castings are sequentially cooled through the cooling mechanism, the reduced temperature range is sequentially increased, and the temperature can be buffered by heating to 20-30 ℃ after each cooling treatment, so that the stability of the castings can be ensured through the arrangement, and the castings cannot be rapidly cooled to cause damage to the castings and the like.
Description
Technical Field
the invention relates to the field of refrigerator foaming die castings, in particular to a processing technology of a refrigerator foaming die casting.
background
the cast aluminum is a technological method that the aluminum in a molten state is poured into a mould and cooled to form an aluminum piece with a required shape. The cast article obtained by casting aluminum is referred to as an aluminum casting.
during the casting forming process of the cast aluminum part, defects such as internal porosity, shrinkage cavity, air hole and the like are easily generated, and after the cast containing the defects is machined, the surface dense layer part is removed to expose internal structure defects. When a pressure-tight sealing test is carried out on automobile cast aluminum parts with sealing requirements, such as a cylinder body, a cylinder cover, an intake manifold, a brake valve body and the like, the existence of defective micropores can cause leakage of sealing media to cause a large amount of waste products, and the defects can be discovered only after pressure test after machining, so that serious waves of working hours, raw materials and energy are caused. In order to solve the problem of high rejection rate of automobile aluminum castings and save castings which are possibly scrapped due to the defects, certain treatment measures are required in production, and currently, the most common technology is infiltration treatment, namely plugging. The "infiltration" is a process technology in which an infiltrant is infiltrated into the micropores of an aluminum casting under certain conditions, and the filler infiltrated into the pores is integrated with the inner walls of the pores of the casting after solidification to block the micropores, so that the part can meet the conditions of pressurization, seepage prevention, leakage prevention and the like.
but present refrigerator foaming die casting still has some deficiencies in the in-process of processing, casting in the foundry goods course of working, generally the melt all directly pours into the crystallizer into, but direct injection can lead to solution to lead to the fact the leading-in inhomogeneous, and cause the waste easily, secondly the in-process of heat treatment, generally can't directly cool off the foundry goods, can cause the damage to the foundry goods like this, and finally, solution need stir it when mixing, and the stirring has the stirring thoroughly easily, influences solution mixing efficiency.
Disclosure of Invention
the invention aims to provide a refrigerator foaming die casting processing technology to solve the technical problem.
in order to solve the technical problems, the invention adopts the following technical scheme:
a refrigerator foaming die casting processing technology is characterized in that: the method specifically comprises the following steps:
(S1) batching: the following distribution is carried out according to the mass percentage of elements: si: 0.1-0.4, 0.1-0.5 of Fe, Cu: 1.2-2.0, Mn: 0.1-0.30, Mg: 2.1-2.9, Cr: 0.18-0.28, Zn: 5.1-6.1, Ti: 0.1-0.2, other elements: 0.01-0.05, Al: the balance, then batching according to the above percentage to obtain a molten material;
(S2) melting: uniformly placing the molten material obtained in the step (S1) into a smelting furnace, placing the molten material under the smelting furnace with a larger volume so as to melt the molten material, and standing for a period of time when the molten material is heated continuously and molten aluminum appears in the molten material, so that the molten material is kept stable;
(S3) stirring: adding a covering agent into the smelting furnace, uniformly covering the covering agent on the surface of the molten material, stirring and mixing the covering agent and the molten material by a stirring mechanism, performing surrounding stirring around the inner wall of the smelting furnace by a stirring rod in the stirring process, performing surrounding stirring for two circles, and stirring from one side of the solution in the smelting furnace to the other side;
(S4) refining: moving the molten material in the step (S3) to a standing furnace for refining and slagging-off treatment, and standing for about 30min after treatment to finally obtain pure molten material;
(S5) casting: introducing the pure molten material obtained in the step (S4) into a crystallizer, sequentially introducing the molten material from fast to slow in the introduction process, and then casting the molten material through a refrigerator foaming mold to obtain a casting after the casting is finished;
(S6) heat treatment: and (S5) primarily cleaning the surface of the casting obtained in the step (S5), then annealing, and cooling.
Preferably, the step (S5) of casting specifically includes the following steps:
(1) Firstly, pure melt obtained in the step (S4) is introduced from the middle of the mold, and then is sequentially introduced into the mold in a spiral manner, when the melt is introduced into the mold and is full, the introduction rate is reduced, and the melt is slowly introduced, so that the introduction is more uniform, and the waste of the melt is avoided;
(2) then casting the molten material through a crystallizer, wherein the casting temperature is controlled at 720-750 ℃;
(3) and taking out the casting after casting.
Preferably, the heat treatment process in the step (S6) includes the following steps:
(1) Firstly, primarily cleaning the surface of the casting obtained in the step (S5), then cooling to 80-100 ℃ through a cooling mechanism, and standing for 1-2 h;
(2) further, heating to 20-30 ℃, and standing for 0.5-1 h;
(3) then, cooling the mixture again by 180 ℃ and 200 ℃ on the basis of the step (2), and standing the mixture for 1 to 2 hours;
(4) further, heating to 20-30 ℃, and standing for 0.5-1 h;
(5) Then cooling to 280-300 ℃ again on the basis of the step (4), and standing for 1-2 h;
(6) further, heating to 20-30 ℃, and standing for 0.5-1 h;
(7) And (4) placing the casting obtained in the step (6) at room temperature, and standing for 1-2 h.
Preferably, the temperature of the furnace in the step (S2) is 750-780 ℃, and the heating time is 40-60 min.
Preferably, the stirring time in the step (S3) is 30 to 50 min.
the invention has the beneficial effects that:
the invention designs a processing technology of a refrigerator foaming die casting, which can achieve the following advantages:
1: in the casting process, the molten material is led in from the middle of the crystallizer firstly and then is led in from the outer side in turn in a spiral mode, and the speed is from high to low, so that the solution can be led in more uniformly by the arrangement, the solution is not easy to overflow, and the waste of the solution is avoided;
2: in the heat treatment process, the castings are sequentially cooled through the cooling mechanism, the reduced temperature range is sequentially enlarged, and the temperature is buffered by raising the temperature to 20-30 ℃ after each cooling treatment, so that the stability of the castings can be ensured through the arrangement, and the castings cannot be rapidly cooled to cause damage to the castings and the like;
3: in the stirring process, firstly, the stirring rod is used for performing surrounding stirring around the inner wall of the smelting furnace, after the stirring is performed for two circles in a surrounding mode, then the solution in the smelting furnace is stirred around the other side, the molten material and the covering agent can be stirred more thoroughly through the arrangement, and the solution can be prevented from being remained on the inner wall of the smelting furnace through the surrounding stirring.
Detailed Description
The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example 1
a refrigerator foaming die casting processing technology is characterized in that: the method specifically comprises the following steps:
(S1) batching: the following distribution is carried out according to the mass percentage of elements: si: 0.1-0.4, 0.1-0.5 of Fe, Cu: 1.2-2.0, Mn: 0.1-0.30, Mg: 2.1-2.9, Cr: 0.18-0.28, Zn: 5.1-6.1, Ti: 0.1-0.2, other elements: 0.01-0.05, Al: the balance, then batching according to the above percentage to obtain a molten material;
(S2) melting: uniformly placing the molten material obtained in the step (S1) into a smelting furnace, placing the molten material under the smelting furnace with a larger volume so as to melt the molten material, and standing for a period of time when the molten material is heated continuously and molten aluminum appears in the molten material, so that the molten material is kept stable;
(S3) stirring: adding a covering agent into the smelting furnace, uniformly covering the covering agent on the surface of the molten material, stirring and mixing the covering agent and the molten material by a stirring mechanism, performing surrounding stirring around the inner wall of the smelting furnace by a stirring rod in the stirring process, performing surrounding stirring for two circles, and stirring from one side of the solution in the smelting furnace to the other side;
(S4) refining: moving the molten material in the step (S3) to a standing furnace for refining and slagging-off treatment, and standing for about 30min after treatment to finally obtain pure molten material;
(S5) casting: introducing the pure molten material obtained in the step (S4) into a crystallizer, sequentially introducing the molten material from fast to slow in the introduction process, and then casting the molten material through a refrigerator foaming mold to obtain a casting after the casting is finished;
(S6) heat treatment: and (S5) primarily cleaning the surface of the casting obtained in the step (S5), then annealing, and cooling.
example 2
a refrigerator foaming die casting processing technology is characterized in that: the method specifically comprises the following steps:
(S1) batching: the following distribution is carried out according to the mass percentage of elements: si: 0.1-0.4, 0.1-0.5 of Fe, Cu: 1.2-2.0, Mn: 0.1-0.30, Mg: 2.1-2.9, Cr: 0.18-0.28, Zn: 5.1-6.1, Ti: 0.1-0.2, other elements: 0.01-0.05, Al: the balance, then batching according to the above percentage to obtain a molten material;
(S2) melting: uniformly placing the molten material obtained in the step (S1) into a smelting furnace, placing the molten material under the smelting furnace with a larger volume so as to melt the molten material, and standing for a period of time when the molten material is heated continuously and molten aluminum appears in the molten material, so that the molten material is kept stable;
(S3) stirring: adding a covering agent into the smelting furnace, uniformly covering the covering agent on the surface of the molten material, stirring and mixing the covering agent and the molten material by a stirring mechanism, performing surrounding stirring around the inner wall of the smelting furnace by a stirring rod in the stirring process, performing surrounding stirring for two circles, and stirring from one side of the solution in the smelting furnace to the other side;
(S4) refining: moving the molten material in the step (S3) to a standing furnace for refining and slagging-off treatment, and standing for about 30min after treatment to finally obtain pure molten material;
(S5) casting: introducing the pure molten material obtained in the step (S4) into a crystallizer, sequentially introducing the molten material from fast to slow in the introduction process, and then casting the molten material through a refrigerator foaming mold to obtain a casting after the casting is finished;
(S6) heat treatment: and (S5) primarily cleaning the surface of the casting obtained in the step (S5), then annealing, and cooling.
In the casting process of the step (S5), the method specifically includes the following steps:
(1) firstly, pure melt obtained in the step (S4) is introduced from the middle of the mold, and then is sequentially introduced into the mold in a spiral manner, when the melt is introduced into the mold and is full, the introduction rate is reduced, and the melt is slowly introduced, so that the introduction is more uniform, and the waste of the melt is avoided;
(2) Then casting the molten material through a crystallizer, wherein the casting temperature is controlled at 720-750 ℃;
(3) and taking out the casting after casting.
example 3
A refrigerator foaming die casting processing technology is characterized in that: the method specifically comprises the following steps:
(S1) batching: the following distribution is carried out according to the mass percentage of elements: si: 0.1-0.4, 0.1-0.5 of Fe, Cu: 1.2-2.0, Mn: 0.1-0.30, Mg: 2.1-2.9, Cr: 0.18-0.28, Zn: 5.1-6.1, Ti: 0.1-0.2, other elements: 0.01-0.05, Al: the balance, then batching according to the above percentage to obtain a molten material;
(S2) melting: uniformly placing the molten material obtained in the step (S1) into a smelting furnace, placing the molten material under the smelting furnace with a larger volume so as to melt the molten material, and standing for a period of time when the molten material is heated continuously and molten aluminum appears in the molten material, so that the molten material is kept stable;
(S3) stirring: adding a covering agent into the smelting furnace, uniformly covering the covering agent on the surface of the molten material, stirring and mixing the covering agent and the molten material by a stirring mechanism, performing surrounding stirring around the inner wall of the smelting furnace by a stirring rod in the stirring process, performing surrounding stirring for two circles, and stirring from one side of the solution in the smelting furnace to the other side;
(S4) refining: moving the molten material in the step (S3) to a standing furnace for refining and slagging-off treatment, and standing for about 30min after treatment to finally obtain pure molten material;
(S5) casting: introducing the pure molten material obtained in the step (S4) into a crystallizer, sequentially introducing the molten material from fast to slow in the introduction process, and then casting the molten material through a refrigerator foaming mold to obtain a casting after the casting is finished;
(S6) heat treatment: and (S5) primarily cleaning the surface of the casting obtained in the step (S5), then annealing, and cooling.
the heat treatment process of the step (S6) specifically includes the steps of:
(1) Firstly, primarily cleaning the surface of the casting obtained in the step (S5), then cooling to 80-100 ℃ through a cooling mechanism, and standing for 1-2 h;
(2) further, heating to 20-30 ℃, and standing for 0.5-1 h;
(3) then, cooling the mixture again by 180 ℃ and 200 ℃ on the basis of the step (2), and standing the mixture for 1 to 2 hours;
(4) further, heating to 20-30 ℃, and standing for 0.5-1 h;
(5) then cooling to 280-300 ℃ again on the basis of the step (4), and standing for 1-2 h;
(6) further, heating to 20-30 ℃, and standing for 0.5-1 h;
(7) and (4) placing the casting obtained in the step (6) at room temperature, and standing for 1-2 h.
the foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A refrigerator foaming die casting processing technology is characterized in that: the method specifically comprises the following steps:
(S1) batching: the following distribution is carried out according to the mass percentage of elements: si: 0.1-0.4, 0.1-0.5 of Fe, Cu: 1.2-2.0, Mn: 0.1-0.30, Mg: 2.1-2.9, Cr: 0.18-0.28, Zn: 5.1-6.1, Ti: 0.1-0.2, other elements: 0.01-0.05, Al: the balance, then batching according to the above percentage to obtain a molten material;
(S2) melting: uniformly placing the molten material obtained in the step (S1) into a smelting furnace, placing the molten material under the smelting furnace with a larger volume so as to melt the molten material, and standing for a period of time when the molten material is heated continuously and molten aluminum appears in the molten material, so that the molten material is kept stable;
(S3) stirring: adding a covering agent into the smelting furnace, uniformly covering the covering agent on the surface of the molten material, stirring and mixing the covering agent and the molten material by a stirring mechanism, performing surrounding stirring around the inner wall of the smelting furnace by a stirring rod in the stirring process, performing surrounding stirring for two circles, and stirring from one side of the solution in the smelting furnace to the other side;
(S4) refining: moving the molten material in the step (S3) to a standing furnace for refining and slagging-off treatment, and standing for about 30min after treatment to finally obtain pure molten material;
(S5) casting: introducing the pure molten material obtained in the step (S4) into a crystallizer, sequentially introducing the molten material from fast to slow in the introduction process, and then casting the molten material through a refrigerator foaming mold to obtain a casting after the casting is finished;
(S6) heat treatment: and (S5) primarily cleaning the surface of the casting obtained in the step (S5), then annealing, and cooling.
2. The refrigerator foaming die casting processing technology as claimed in claim 1, characterized in that: the step (S5) of casting specifically includes the following steps:
(1) firstly, pure melt obtained in the step (S4) is introduced from the middle of the mold, and then is sequentially introduced into the mold in a spiral manner, when the melt is introduced into the mold and is full, the introduction rate is reduced, and the melt is slowly introduced, so that the introduction is more uniform, and the waste of the melt is avoided;
(2) Then casting the molten material through a crystallizer, wherein the casting temperature is controlled at 720-750 ℃;
(3) And taking out the casting after casting.
3. the refrigerator foaming die casting processing technology as claimed in claim 1, characterized in that: the step (S6) of heat treating specifically includes the steps of:
(1) firstly, primarily cleaning the surface of the casting obtained in the step (S5), then cooling to 80-100 ℃ through a cooling mechanism, and standing for 1-2 h;
(2) further, heating to 20-30 ℃, and standing for 0.5-1 h;
(3) then, cooling the mixture again by 180 ℃ and 200 ℃ on the basis of the step (2), and standing the mixture for 1 to 2 hours;
(4) further, heating to 20-30 ℃, and standing for 0.5-1 h;
(5) then cooling to 280-300 ℃ again on the basis of the step (4), and standing for 1-2 h;
(6) further, heating to 20-30 ℃, and standing for 0.5-1 h;
(7) and (4) placing the casting obtained in the step (6) at room temperature, and standing for 1-2 h.
4. The refrigerator foaming die casting processing technology as claimed in claim 1, characterized in that: the temperature of the furnace in the step (S2) is 750-780 ℃, and the heating time is 40-60 min.
5. the refrigerator foaming die casting processing technology as claimed in claim 1, characterized in that: the stirring time in the step (S3) is 30-50 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910956754.7A CN110551930A (en) | 2019-10-10 | 2019-10-10 | Processing technology of refrigerator foaming die casting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910956754.7A CN110551930A (en) | 2019-10-10 | 2019-10-10 | Processing technology of refrigerator foaming die casting |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975197A (en) * | 2015-06-17 | 2015-10-14 | 西安建筑科技大学 | Rare-earth magnesium alloy preparation method |
| CN106702229A (en) * | 2016-09-07 | 2017-05-24 | 滁州市鑫鼎机械模具制造有限公司 | Machining technology for improved refrigerator foaming mold casting |
| CN106925735A (en) * | 2015-12-30 | 2017-07-07 | 北京有色金属研究总院 | A kind of device and method for preparing big specification high-quality aluminium alloy cast ingot |
| CN109487114A (en) * | 2019-01-03 | 2019-03-19 | 哈尔滨工业大学 | A kind of complex component instrument grade composite material and preparation method |
-
2019
- 2019-10-10 CN CN201910956754.7A patent/CN110551930A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975197A (en) * | 2015-06-17 | 2015-10-14 | 西安建筑科技大学 | Rare-earth magnesium alloy preparation method |
| CN106925735A (en) * | 2015-12-30 | 2017-07-07 | 北京有色金属研究总院 | A kind of device and method for preparing big specification high-quality aluminium alloy cast ingot |
| CN106702229A (en) * | 2016-09-07 | 2017-05-24 | 滁州市鑫鼎机械模具制造有限公司 | Machining technology for improved refrigerator foaming mold casting |
| CN109487114A (en) * | 2019-01-03 | 2019-03-19 | 哈尔滨工业大学 | A kind of complex component instrument grade composite material and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 李念奎等: "《铝合金材料及其热处理技术》", 30 April 2012, 冶金工业出版社 * |
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