CN113231601A - Reduction gearbox shell casting method - Google Patents
Reduction gearbox shell casting method Download PDFInfo
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- CN113231601A CN113231601A CN202110403894.9A CN202110403894A CN113231601A CN 113231601 A CN113231601 A CN 113231601A CN 202110403894 A CN202110403894 A CN 202110403894A CN 113231601 A CN113231601 A CN 113231601A
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- casting
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- 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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
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- 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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- 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
- C22F1/047—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 magnesium as the next major constituent
Abstract
The invention provides a casting method of a speed reduction box shell, which comprises the following steps of S1 sand preparation: preparing molding sand and core sand; s2 preparing a mold: preparing a mould, which comprises a sand mould, a sand core and a sand box; the sand mould is arranged in the sand box, and the sand core is arranged in the sand mould to form a casting cavity; s3 casting molding: injecting the smelted molten metal into a casting cavity, filling the casting cavity with the molten metal, and cooling and forming to obtain a casting; and S4 casting appearance detection: observing whether appearance defects appear on the surface of the casting; processing unqualified castings until the castings are qualified, and discarding the castings which cannot reach qualified quality through later-stage processing, wherein the qualified castings enter the next working procedure; s5 casting heat treatment: putting the qualified blank into a heat treatment device for heat treatment; and S6 casting performance detection: testing the mechanical property of the casting, and entering the next procedure for the qualified casting; and S7, warehousing the casting: and (4) marking the qualified gearbox shell, recording the performance parameters of the marked shell, and storing in a warehouse.
Description
Technical Field
The invention relates to the technical field of gearbox casing molding, in particular to a gearbox casing casting method.
Background
In the fierce competition of the world automobile industry, each automobile manufacturer develops towards high quality, high reliability, light weight, energy conservation and low cost; the material aspect shows light weight, damping and shock absorption, corrosion resistance and the like, and aluminum alloy materials are used for replacing parts of steel (iron) pieces so as to meet the requirements of development of automobiles to high quality and low cost; at present, the finished product rate of the material of the gearbox shell for the automobile in China is low, the appearance of the cast gearbox shell has defects, or the mechanical property of the cast gearbox shell does not reach the standard after quenching.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for casting a shell of a reduction gearbox.
The invention solves the technical problems through the following technical means:
the casting method of the reduction gearbox shell comprises the following steps,
s1 sand preparation
Preparing molding sand for preparing a sand mold and core sand for preparing a sand core;
s2 preparing a mold
Preparing a mould, which comprises a sand mould, a sand core and a sand box; the sand mould is arranged in the sand box, and the sand core is arranged in the sand mould to form a casting cavity;
s3 casting molding
Injecting the smelted molten metal into a casting cavity, filling the casting cavity with the molten metal, and cooling and forming to obtain a casting;
s4 casting appearance detection
Observing whether appearance defects appear on the surface of the casting; processing unqualified castings until the castings are qualified, and discarding the castings which cannot reach qualified quality through later-stage processing, wherein the qualified castings enter the next working procedure;
s5 Heat treatment of castings
Putting the qualified blank in the S4 into a heat treatment device for heat treatment;
s6 casting performance detection
Testing the mechanical property of the leftover materials of the castings, and enabling the qualified castings to enter the next procedure;
s7 warehousing of castings
And (5) marking the qualified gearbox shell in the step (S6), recording the shell performance parameters corresponding to the marking, and storing the shell performance parameters in a warehouse.
As an improvement of the technical scheme, the molding sand in S1 is prepared by mixing 85 +/-5% of used sand, 5 +/-1% of clay, 5 +/-1% of water and 5 +/-1% of coal powder; the core sand adopts oil sand.
As an improvement of the technical scheme, four casting cavities are arranged in S2 and are distributed in a matrix.
As an improvement of the above technical solution, the molten metal in S3 includes the following components in parts by weight: 0.2% molybdenum, 0.12% titanium, 0.08% cerium, 2% manganese, 0.5% zinc, 10% magnesium, and the balance aluminum.
As an improvement of the technical scheme, the heat treatment in S5 comprises the following steps of preserving heat for 5.5 +/-0.5 hours at 535 +/-5 ℃, and then quenching in water at 80 +/-10 ℃, wherein the quenching time is not less than 5 min; and then carrying out aging treatment.
As an improvement of the technical scheme, the aging treatment time is 4 +/-0.5 days, and the aging temperature is 165 +/-5 ℃.
The invention has the beneficial effects that: the surface of the casting is observed, the unqualified casting is polished and repaired, and the repaired poor casting is re-manufactured; resource waste caused by the fact that the performance of the casting does not reach the standard after the heat treatment and processing steps are carried out is avoided; the casting with qualified appearance is subjected to mechanical new energy test, and the qualified casting is put in storage after recording parameters, so that the mechanical property changes of different batches and different castings in the same batch can be objectively known in the later period, the performance trend of the casting is known, the process is modified immediately, large batches of unqualified castings are avoided, the high qualification rate is maintained, and the cost is reduced.
Drawings
FIG. 1 is a schematic flow chart of a method for casting a gearbox housing according to an embodiment of the invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Examples
As shown in fig. 1, the method for casting the gearbox shell according to the embodiment comprises the following steps,
s1 sand preparation
Preparing molding sand for preparing a sand mold and core sand for preparing a sand core;
s2 preparing a mold
Preparing a mould, which comprises a sand mould, a sand core and a sand box; the sand mould is arranged in the sand box, and the sand core is arranged in the sand mould to form a casting cavity;
s3 casting molding
Injecting the smelted molten metal into a casting cavity, filling the casting cavity with the molten metal, and cooling and forming to obtain a casting;
s4 casting appearance detection
Observing whether appearance defects appear on the surface of the casting; processing unqualified castings until the castings are qualified, and discarding the castings which cannot reach qualified quality through later-stage processing, wherein the qualified castings enter the next working procedure;
s5 Heat treatment of castings
Putting the qualified blank in the S4 into a heat treatment device for heat treatment;
s6 casting performance detection
Testing the mechanical property of the leftover materials of the castings, and enabling the qualified castings to enter the next procedure;
s7 warehousing of castings
And (5) marking the qualified gearbox shell in the step (S6), recording the shell performance parameters corresponding to the marking, and storing the shell performance parameters in a warehouse.
The surface of the casting is observed, the unqualified casting is polished and repaired, and the repaired poor casting is re-manufactured; resource waste caused by the fact that the performance of the casting does not reach the standard after the heat treatment and processing steps are carried out is avoided; the casting with qualified appearance is subjected to mechanical new energy test, and the qualified casting is put in storage after recording parameters, so that the mechanical property changes of different batches and different castings in the same batch can be objectively known in the later period, the performance trend of the casting is known, the process is modified immediately, large batches of unqualified castings are avoided, high qualification rate is maintained, and the cost is reduced; the leftover materials which need to be cut in the later period can exist in the two sections after the casting is formed, and the mechanical property of one side, close to the casting, of the leftover materials is almost the same as that of the casting, so that the mechanical property test is carried out on the leftover materials, the appearance of the casting cannot be influenced, and the measured data can represent the property of the casting.
The molding sand in S1 is prepared by mixing 85 plus or minus 5 percent of used sand, 5 plus or minus 1 percent of clay, 5 plus or minus 1 percent of water and 5 plus or minus 1 percent of coal powder; the core sand adopts oil sand.
And four casting cavities are arranged in the S2 and distributed in a matrix manner, so that the production efficiency is improved, and the cost is reduced.
The molten metal in S3 comprises the following components in parts by weight: 0.2% molybdenum, 0.12% titanium, 0.08% cerium, 2% manganese, 0.5% zinc, 10% magnesium, and the balance aluminum; impurities in the alloy solution during smelting are removed by adding cerium, so that the mechanical property of the casting is prevented from being influenced by the impurities; the sand sticking degree of the casting during molding is reduced by adding molybdenum, and unqualified castings caused by appearance defects are reduced.
S5 heat treatment comprises the following steps of preserving heat for 5.5 +/-0.5 hours at 535 +/-5 ℃, and then quenching in water at 80 +/-10 ℃, wherein the quenching time is not less than 5 min; aging in a low temperature furnace at 165 +/-5 ℃ for 4 +/-0.5 hours; and the mechanical property of the casting is improved.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The casting method of the reduction gearbox shell is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s1 sand preparation
Preparing molding sand for preparing a sand mold and core sand for preparing a sand core;
s2 preparing a mold
Preparing a mould, which comprises a sand mould, a sand core and a sand box; the sand mould is arranged in the sand box, and the sand core is arranged in the sand mould to form a casting cavity;
s3 casting molding
Injecting the smelted molten metal into a casting cavity, filling the casting cavity with the molten metal, and cooling and forming to obtain a casting;
s4 casting appearance detection
Observing whether appearance defects appear on the surface of the casting; processing unqualified castings until the castings are qualified, and discarding the castings which cannot reach qualified quality through later-stage processing, wherein the qualified castings enter the next working procedure;
s5 Heat treatment of castings
Putting the qualified blank in the S4 into a heat treatment device for heat treatment;
s6 casting performance detection
Testing the mechanical property of the leftover materials of the castings, and enabling the qualified castings to enter the next procedure;
s7 warehousing of castings
And (5) marking the qualified gearbox shell in the step (S6), recording the shell performance parameters corresponding to the marking, and storing the shell performance parameters in a warehouse.
2. The method for casting a reduction gearbox housing according to claim 1, wherein: the molding sand in S1 is prepared by mixing 85 plus or minus 5 percent of used sand, 5 plus or minus 1 percent of clay, 5 plus or minus 1 percent of water and 5 plus or minus 1 percent of coal powder; the core sand adopts oil sand.
3. The method for casting a reduction gearbox housing according to claim 1, wherein: and four casting cavities are arranged in the S2 and are distributed in a matrix manner.
4. The method for casting a reduction gearbox housing according to claim 1, wherein: the molten metal in S3 comprises the following components in parts by weight: 0.2% molybdenum, 0.12% titanium, 0.08% cerium, 2% manganese, 0.5% zinc, 10% magnesium, and the balance aluminum.
5. The method for casting a reduction gearbox housing according to claim 1, wherein: s5 heat treatment comprises the following steps of preserving heat for 5.5 +/-0.5 hours at 535 +/-5 ℃, and then quenching in water at 80 +/-10 ℃, wherein the quenching time is not less than 5 min; and then carrying out aging treatment.
6. The method for casting a reduction gearbox housing according to claim 5, wherein: the aging treatment time is 4 +/-0.5 days, and the aging temperature is 165 +/-5 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110403894.9A CN113231601A (en) | 2021-04-15 | 2021-04-15 | Reduction gearbox shell casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110403894.9A CN113231601A (en) | 2021-04-15 | 2021-04-15 | Reduction gearbox shell casting method |
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| Publication Number | Publication Date |
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| CN113231601A true CN113231601A (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110403894.9A Pending CN113231601A (en) | 2021-04-15 | 2021-04-15 | Reduction gearbox shell casting method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002050325A1 (en) * | 2000-12-21 | 2002-06-27 | Eads Deutschland Gmbh | Non-hardenable aluminium alloy as a semi-finished product for structures |
| CN103436754A (en) * | 2013-07-16 | 2013-12-11 | 安徽省天马泵阀集团有限公司 | High anti-corrosion casting Mg-Al alloy for pump bodies and manufacturing method thereof |
| CN104785731A (en) * | 2015-05-11 | 2015-07-22 | 江苏力源金河铸造有限公司 | Reduction gearbox shell casting process |
| CN104862539A (en) * | 2015-04-30 | 2015-08-26 | 高旋 | Aluminum alloy gearbox casing |
| CN110938311A (en) * | 2019-10-17 | 2020-03-31 | 清远高新华园科技协同创新研究院有限公司 | Low-density flexible high-thermal-conductivity wave-absorbing silica gel sheet, preparation method and equipment |
| CN112301260A (en) * | 2020-10-16 | 2021-02-02 | 广东鸿图科技股份有限公司 | High-strength high-toughness die-casting aluminum alloy and preparation method thereof |
-
2021
- 2021-04-15 CN CN202110403894.9A patent/CN113231601A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002050325A1 (en) * | 2000-12-21 | 2002-06-27 | Eads Deutschland Gmbh | Non-hardenable aluminium alloy as a semi-finished product for structures |
| CN103436754A (en) * | 2013-07-16 | 2013-12-11 | 安徽省天马泵阀集团有限公司 | High anti-corrosion casting Mg-Al alloy for pump bodies and manufacturing method thereof |
| CN104862539A (en) * | 2015-04-30 | 2015-08-26 | 高旋 | Aluminum alloy gearbox casing |
| CN104785731A (en) * | 2015-05-11 | 2015-07-22 | 江苏力源金河铸造有限公司 | Reduction gearbox shell casting process |
| CN110938311A (en) * | 2019-10-17 | 2020-03-31 | 清远高新华园科技协同创新研究院有限公司 | Low-density flexible high-thermal-conductivity wave-absorbing silica gel sheet, preparation method and equipment |
| CN112301260A (en) * | 2020-10-16 | 2021-02-02 | 广东鸿图科技股份有限公司 | High-strength high-toughness die-casting aluminum alloy and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 第一汽车制造厂，长春汽车材料研究所《机械工程材料手册》编写组: "《机械工程材料手册 有色金属材料》", 机械工业出版社, pages: 133 - 135 * |
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