CN110976806A - Casting method of thin-wall aluminum alloy casting - Google Patents
Casting method of thin-wall aluminum alloy casting Download PDFInfo
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- CN110976806A CN110976806A CN201911159680.0A CN201911159680A CN110976806A CN 110976806 A CN110976806 A CN 110976806A CN 201911159680 A CN201911159680 A CN 201911159680A CN 110976806 A CN110976806 A CN 110976806A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C23/00—Tools; Devices not mentioned before for moulding
- B22C23/02—Devices for coating moulds or cores
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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
- B22C9/10—Cores; Manufacture or installation of cores
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- 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
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- 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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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Abstract
The invention belongs to the field of casting, and relates to a casting method of a thin-wall aluminum alloy casting, which comprises the following steps: performing hollow-out arrangement of an inclined plane on the back surface of the mold, and arranging a heating rod mounting hole site and a heat insulation layer on the inclined plane; blowing each oil way shell core in the casting cavity; melting the raw materials to 730 ℃ for pouring; preheating a mould, uniformly spraying a cavity coating, brushing a pouring cup with a heat-insulating coating, and cleaning a vent plug; sequentially carrying out downloading on the shell cores to obtain a mold cavity, cleaning the mold cavity by compressed air, blowing the mold cavity for mold closing and pouring after the mold opening is checked and the combined shell cores are complete; the pouring temperature is 730 +/-5 ℃; and (3) vibrating to remove the molding sand in the casting cavity, cutting a casting dead head, and polishing and cleaning burrs and fash of the casting. The invention provides a casting method of a thin-wall aluminum alloy casting, which has the advantages of quick mold heating, small temperature loss and capability of improving the internal quality of the casting.
Description
Technical Field
The invention belongs to the field of casting, and relates to a casting method of a thin-wall aluminum alloy casting, in particular to a casting method of a complex thin-wall aluminum alloy casting.
Background
In an aircraft engine fuel accessory, the fuel accessory has a plurality of parts with inner cavity wall thickness of 2.5-4.5 mm, and the parts are generally characterized in that internal oil paths are complex, all the oil paths are overlapped and staggered, a plurality of thin oil paths are long, the shapes of the thin oil paths are different, and the like. The local inner cavity oil circuit also needs to bear high-pressure oil, so that the requirements on the strength and the air tightness of parts are high.
Because the inner cavity of the shell is complex in structure, the heat energy in the casting is more and dispersed, the number of shell cores forming the inner cavity is more and the positioning is difficult, most of the shells are cast by sand molds or metal molds by gravity. However, these two casting methods have many disadvantages in producing such a shell, which are particularly shown in the following: 1) the gravity pouring of the sand mold is adopted, so that the casting can be poured, the pouring temperature of molten metal needs to exceed 750 ℃, so that part of alloy components are seriously burnt, the component inspection of the casting is unqualified, and the surface quality of the sand mold casting is poor; 2) the metal mold gravity casting has insufficient heat storage capacity, two castings are poured quickly after the mold is heated to about 400 ℃, so that the castings are easy to have the defects of cold shut, undercasting and the like, the casting yield is low, and the production cost is high; 3) the inner cavity structure of the shell is complex, the heat is more and dispersed, a plurality of chills are required to be arranged, or the subsidies are increased, so that the process scheme is complex, the shrinkage porosity defect is difficult to thoroughly solve, and the scientific research and production tasks of companies are seriously influenced.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a casting method of a thin-wall aluminum alloy casting, which has the advantages of quick mold heating, small temperature loss and capability of improving the internal quality of the casting.
In order to achieve the purpose, the invention adopts the following technical scheme:
a casting method of a thin-wall aluminum alloy casting is characterized by comprising the following steps: the casting method of the thin-wall aluminum alloy casting comprises the following steps:
1) after the cavity part of the mold is finished, hollowing out the back of the mold, inclining the hollow bottom surface from top to bottom according to the requirement of the temperature gradient sequence of the mold, and arranging a heating rod mounting hole position on the inclined surface; arranging a heat-insulating layer on the inclined surface;
2) blowing each oil way shell core in the inner cavity of the casting, designing an exhaust needle at the head of the core, taking out the shell core, polishing and cleaning, and coating a chilling coating on the shell core with a large heat section; putting the shell core into a kiln at 180 +/-5 ℃ for heat preservation for 2 hours, cooling along with the kiln, and taking out for later use;
3) adding the raw materials into a melting holding furnace, after the raw materials are completely melted, refining and degassing by using a rotary degassing machine when the temperature of the metal liquid reaches 710-730 ℃, adjusting the temperature of the metal liquid to 700 ℃, standing for 30min, adjusting the temperature of the metal liquid to 730 ℃ and then pouring;
4) preheating the mould prepared in the step 1), uniformly spraying a cavity coating, brushing a pouring cup with a heat-insulating coating, and cleaning a vent plug;
5) sequentially putting the shell cores prepared in the step 2) into the mold cavity prepared in the step 1), cleaning the mold cavity by compressed air, blowing the mold cavity and then closing the mold for pouring after the mold is opened and the integrity of the combined shell core is checked; the pouring temperature is 730 +/-5 ℃;
6) and (3) vibrating to remove the molding sand in the casting cavity, cutting a casting dead head, and polishing and cleaning burrs and fash of the casting.
The specific implementation manner of the step 1) is as follows: after the cavity part of the mold is completed, the back surface of the mold is hollowed out, the hollowed bottom surface is inclined by 10-15 degrees from top to bottom according to the requirement of the temperature gradient sequence of the mold, a heating rod mounting hole position is arranged on the inclined surface of 10-15 degrees, the heat-insulating material is wrapped on the inclined surface of 10-15 degrees, the thickness of the heat-insulating material is 3-5 mm, and the heat-insulating material is gradually decreased along the inclined surface of 10-15 degrees.
The heat-insulating material is a mixture of heat-insulating asbestos cloth and water glass; the heat-preservation asbestos cloth and the water glass are mixed according to the mass ratio of 1: mixing and stirring uniformly according to the proportion of 1.
The preheating temperature in the step 4) is 240-280 ℃.
The invention has the beneficial effects that:
the invention provides a casting method of a thin-wall aluminum alloy casting, which comprises the steps of hollowing out the back surface of a mold after a cavity part of the mold is finished, inclining a hollow bottom surface from top to bottom according to the requirement of the temperature gradient sequence of the mold, and arranging a heating rod mounting hole position on an inclined surface; arranging a heat-insulating layer on the inclined surface; blowing each oil way shell core in the inner cavity of the casting, designing an exhaust needle at the head of the core, taking out the shell core, polishing and cleaning, and coating a chilling coating on the shell core with a large heat section; putting the shell core into a kiln at 180 +/-5 ℃ for heat preservation for 2 hours, cooling along with the kiln, and taking out for later use; adding the raw materials into a melting holding furnace, after the raw materials are completely melted, refining and degassing by using a rotary degassing machine when the temperature of the metal liquid reaches 710-730 ℃, adjusting the temperature of the metal liquid to 700 ℃, standing for 30min, adjusting the temperature of the metal liquid to 730 ℃ and then pouring; preheating the prepared mould, uniformly spraying a cavity coating, brushing a pouring cup with a heat-insulating coating, and cleaning a vent plug; sequentially preparing the prepared shell core into a mold cavity, cleaning the mold cavity by compressed air, blowing the mold cavity and then closing the mold for pouring after the mold is opened and the combined shell core is checked to be complete; the pouring temperature is 730 +/-5 ℃; and (3) vibrating to remove the molding sand in the casting cavity, cutting a casting dead head, and polishing and cleaning burrs and fash of the casting. The invention adopts the metal mold casting process, firstly, heating and heat preservation measures are adopted on the metal mold, the temperature loss of the mold in the production process is greatly reduced, meanwhile, the pouring temperature of molten metal is improved, and the defects of cold shut, undercasting and the like of a casting are overcome; secondly, through the structural design that the back of the die is inclined by 10-15 degrees, the temperature gradient of the metal die is ensured to be gradually reduced from top to bottom, the sequential solidification of the casting is facilitated, and the shrinkage porosity defect of the casting is overcome. The new method greatly improves the qualification rate of the castings and ensures that the castings can ensure the smooth completion of scientific research and production tasks. The method for producing the casting has the advantages of fast mold heating, small temperature loss and smooth molten metal filling in the pouring process, and effectively solves the defects of cold shut, undercasting and the like of the thin-wall casting and the problems of shrinkage porosity and shrinkage porosity of the complex thin-wall casting. The invention can form effective temperature gradient in the production process, fundamentally solves the problem of internal shrinkage porosity of complex castings, and improves the internal quality of the castings.
Drawings
FIG. 1 is a schematic flow chart of a casting method of a thin-wall aluminum alloy casting provided by the invention.
Detailed Description
Referring to fig. 1, the present invention provides a casting method of a thin-walled aluminum alloy casting, comprising: the method comprises the steps of mold design, shell core blowing, melting and refining, mold preparation, core setting and pouring, and cutting and cleaning.
The method comprises the following steps:
1) after the cavity part of the mold is finished, hollowing out the back of the mold, inclining the hollow bottom surface from top to bottom according to the requirement of the temperature gradient sequence of the mold, and arranging a heating rod mounting hole position on the inclined surface; arranging a heat-insulating layer on the inclined surface;
the specific steps of the step 1) are as follows:
1.1) designing a mould: designing a die parting method according to the structure of the part, and drawing the die according to a die parting line, wherein the allowance of a machined surface is 2.5 mm;
1.2) designing a process scheme: according to the characteristics of the parts, selecting a casting to enter a pouring gate;
1.3) structural design of a mould: mould die cavity back fretwork design, 10 ~ 15 designs of slant from the top down are smashed the heat preservation asbestos cloth to pieces with water glass 1 to the fretwork bottom surface: 1 evenly stirring, wrapping the mixture on a surface inclined by 10-15 degrees, and sequentially decreasing the thickness of the mixture from top to bottom by 3-5 mm.
2) Blowing each oil way shell core in the inner cavity of the casting, designing an exhaust needle at the head of the core, taking out the shell core, polishing and cleaning, and coating a chilling coating on the shell core with a large heat section; putting the shell core into a kiln at 180 +/-5 ℃ for heat preservation for 2 hours, cooling along with the kiln, and taking out for later use;
the specific steps of step 2) are:
2.1) preheating a mould: preheating the shell core mold at 280-300 ℃;
2.2) core-shell blowing: after the shell core mold is closed, inserting an exhaust needle into the corresponding position of the core print, and blowing the shell core;
2.3) hardening of crust: taking out the shell core after the shell core crusts and hardens, polishing and cleaning the flash, and painting the chilling coating twice on the hot spot.
2.4) baking the shell core: and (3) putting the shell core into a kiln at 180 +/-5 ℃ for heat preservation for 2 hours, cooling along with the kiln, and taking out for later use.
3) Adding the raw materials into a melting holding furnace, after the raw materials are completely melted, refining and degassing by using a rotary degassing machine when the temperature of the metal liquid reaches 710-730 ℃, adjusting the temperature of the metal liquid to 700 ℃, standing for 30min, adjusting the temperature of the metal liquid to 730 ℃ and then pouring;
the specific steps of step 3) are:
3.1) charging and melting: the heat preservation melting furnace is powered on to melt;
3.2) refining the alloy: degassing and refining by using a rotary degassing machine, wherein the degassing time is 10-15 min, a layer of slag removing agent is scattered on the metal liquid surface, and all oxidizing slag on the liquid surface is removed after 5 min;
3.3) standing the molten metal: regulating the temperature of the metal liquid to 700 ℃, standing for 30min, regulating the temperature of the metal liquid to 730 ℃ and waiting for pouring.
4) Preheating the mould prepared in the step 1), uniformly spraying a cavity coating, brushing a pouring cup with a heat-insulating coating, and cleaning a vent plug;
the specific steps of the step 4) are as follows:
4.1) preheating a mold: preheating the mold to 240-280 ℃, uniformly spraying the cavity coating, brushing the heat-preservation coating on the sprue cup, cleaning the vent plug and checking.
4.2) preheating the shell core: preheating the shell core to 80-100 ℃ before casting;
4.3) heating the mould: connecting a heating wire, starting heating to ensure that the temperature of the mold reaches 350-400 ℃, and closing the mold to prepare for casting;
5) sequentially putting the shell cores prepared in the step 2) into the mold cavity prepared in the step 1), cleaning the mold cavity by compressed air, blowing the mold cavity and then closing the mold for pouring after the mold is opened and the integrity of the combined shell core is checked; the pouring temperature is 730 +/-5 ℃;
the specific steps of step 5) are:
5.1) core setting: the shell core is put into a metal lower die, whether the shell core is in place or not is checked, and the core head is ensured to be accurately matched with the hole site;
5.2) closing the mold: closing the mold after the shell core is in place, and blowing sand in the cavity by using compressed air before closing the mold;
5.3) die sinking inspection: opening the mold to check whether the combined shell core is scratched or not in the process of positioning, opening and closing the mold, checking whether the combined shell core is intact or not, and blowing the sand in the mold cavity again by using compressed air;
5.4) scooping and pouring: when the temperature of the molten aluminum reaches 730 +/-10 ℃, scooping the molten aluminum, guiding the molten aluminum into a pouring cup, and starting tilting pouring, wherein the tilting pouring time is 6-15 s, and the tilting speed is in the sequence of slow first, fast second and slow;
5.5) waiting for solidification: after the pouring is finished, cooling the bottom die by introducing water, and waiting for 3-8 min for solidification;
5.6) opening the die to take out the parts: and after the dead head is completely solidified, sequentially opening the die and taking out the casting.
6) Cleaning and cutting: and (3) vibrating to remove the molding sand in the casting cavity, cutting a casting dead head, and polishing and cleaning burrs and fash of the casting.
The invention can solve the problems of cold shut, undercasting, shrinkage porosity and shrinkage cavity of the casting. The invention adopts the metal mold casting process, firstly, heating and heat preservation measures are adopted on the metal mold, the temperature loss of the mold in the production process is greatly reduced, meanwhile, the pouring temperature of molten metal is improved, and the defects of cold shut, undercasting and the like of a casting are overcome; secondly, through the structural design that the back of the die is inclined by 10-15 degrees, the temperature gradient of the metal die is ensured to be gradually reduced from top to bottom, the sequential solidification of the casting is facilitated, and the shrinkage porosity defect of the casting is overcome. The new method greatly improves the qualification rate of the castings and ensures that the castings can ensure the smooth completion of scientific research and production tasks.
Example (b):
this example is an example of the invention applied to casting a complex thin-walled aluminum alloy shell. The shell is made of ZL101A, the maximum external dimension of the casting is 330mm multiplied by 240mm multiplied by 46mm, the inner cavity of the casting is provided with 9 oil passages with different sizes, the minimum section radius is 3mm, the maximum section radius is 12.5mm, and the wall thickness of the casting is only 4 mm.
The specific steps of the embodiment are as follows:
1) designing a mold: firstly, designing a part blank drawing, designing a casting process scheme of the part, and finally designing a die structure according to selected equipment and a casting process scheme. The method comprises the following specific steps:
1.1) designing a blank drawing: according to the structure of a part, the casting is designed into a metal type tilting two-die opening mode, then 2.5mm of allowance is placed on a processing surface, and then die drawing is carried out according to a die parting line;
1.2) designing a process scheme: and selecting the larger outlet surface of the casting as a tilting sprue inlet position, and arranging an open riser. And (3) checking the casting structure on the cross section, designing a blind riser according to the position of the shell core structure where the hot junction is large, and dredging a feeding channel between the riser and the hot junction by utilizing a patch at the position where the blind riser cannot be designed. Finally, splitting the shell cores and designing a mutual core assembly positioning method between the shell cores;
1.3) structural design of a mould: the mould is designed into an upper open type and a lower open type, the shell core is positioned on the lower mould, and the upper half mould is pressed after being closed. Mould die cavity back fretwork design, fretwork bottom surface from the top down 12 designs to one side, smashes heat preservation asbestos cloth to pieces, and water glass 1: 1, stirring uniformly, wrapping the mixture on a 12-degree inclined surface, wherein the thickness of the mixture is 5mm, and the mixture is gradually decreased from top to bottom.
2) Blowing a shell core: blowing a shell core, polishing and cleaning a fash, and charging into a furnace and baking for later use, wherein the method comprises the following specific steps:
2.1) preheating a mould: preheating a shell core die at 280 ℃;
2.2) core-shell blowing: after the shell core mold is closed, inserting an exhaust needle into the corresponding position of the core print, and blowing the shell core;
2.3) hardening of crust: taking out the shell core after the shell core crusts and hardens, polishing and cleaning the flash, and painting the chilling coating twice on the hot spot.
2.4) baking the shell core: and (3) putting the shell core into a drying kiln at the temperature of 180 ℃ for heat preservation for 2h, cooling along with the furnace, and taking out for later use.
3) Melting and refining: adding the raw materials into a melting holding furnace, electrifying for melting, introducing high-purity argon into the molten aluminum after the molten aluminum is melted, and adding a refining agent for rotary degassing. The method comprises the following steps:
3.1) charging and melting: the melting furnace is set to control the temperature of furnace gas, the temperature of the furnace gas is set to 860 ℃, and electricity is supplied to melt;
3.2) refining the alloy: degassing and refining by using argon with the purity of 99.9999%, wherein the pressure of the refining gas is 0.4MPa, after degassing for 15min, scattering a layer of slag removing agent on the liquid surface of the metal, and skimming all oxidizing slag on the liquid surface after 5 min;
3.3) standing the molten metal: regulating the temperature of the metal liquid to 700 ℃, standing for 30min, regulating the temperature of the metal liquid to 730 ℃ and waiting for pouring.
4) Preparing a mould: and (3) installing a metal mold, preheating and spraying the cavity coating, and installing the mold on a tilting casting machine for waiting for casting.
4.1) preheating a mold: preheating the mold to 280 ℃, uniformly spraying a cavity coating, brushing the heat-preservation coating on the sprue cup, cleaning the vent plug and checking.
4.2) preheating the shell core: before casting, the shell core needs to be preheated to 80 ℃, and an operator wears gloves to put the core;
4.3) heating the mould: connecting a heating wire, starting heating to ensure that the temperature of the die reaches 380 ℃, and closing the die to prepare for casting.
5) Pouring a lower core: and (4) putting the assembled shell core into a mold, closing the mold, scooping the materials and pouring in a tilting manner.
5.1) core setting: the shell core is put into a metal lower die, whether the shell core is in place or not is checked, and the core head is ensured to be accurately matched with the hole site;
5.2) closing the mold: closing the mold after the shell core is in place, and blowing sand in the cavity by using compressed air before closing the mold;
5.3) die sinking inspection: opening the mold to check whether the combined shell core is scratched or not in the process of positioning, opening and closing the mold, checking whether the combined shell core is intact or not, and blowing the sand in the mold cavity again by using compressed air;
5.4) scooping and pouring: when the temperature of the molten aluminum reaches 730 +/-10 ℃, scooping the material and guiding the material into a pouring cup, starting tilting pouring, wherein the tilting pouring time is 12s, and the tilting speed is in the sequence of slow first, fast second and slow;
5.5) waiting for solidification: after the pouring is finished, the bottom die is cooled by introducing water, and the solidification time is 4 min;
5.6) opening the die to take out the parts: and after the dead head is completely solidified, sequentially opening the die and taking out the casting.
6) Cutting and cleaning: cutting casting heads of the castings, and cleaning burrs, burrs and the like on the surfaces of the castings by using a cleaning and polishing tool.
Claims (4)
1. A casting method of a thin-wall aluminum alloy casting is characterized by comprising the following steps: the casting method of the thin-wall aluminum alloy casting comprises the following steps:
1) after the cavity part of the mold is finished, hollowing out the back of the mold, inclining the hollow bottom surface from top to bottom according to the requirement of the temperature gradient sequence of the mold, and arranging a heating rod mounting hole position on the inclined surface; arranging a heat-insulating layer on the inclined surface;
2) blowing each oil way shell core in the inner cavity of the casting, designing an exhaust needle at the head of the core, taking out the shell core, polishing and cleaning, and coating a chilling coating on the shell core with a large heat section; putting the shell core into a kiln at 180 +/-5 ℃ for heat preservation for 2 hours, cooling along with the kiln, and taking out for later use;
3) adding the raw materials into a melting holding furnace, after the raw materials are completely melted, refining and degassing by using a rotary degassing machine when the temperature of the metal liquid reaches 710-730 ℃, adjusting the temperature of the metal liquid to 700 ℃, standing for 30min, adjusting the temperature of the metal liquid to 730 ℃ and then pouring;
4) preheating the mould prepared in the step 1), uniformly spraying a cavity coating, brushing a pouring cup with a heat-insulating coating, and cleaning a vent plug;
5) sequentially putting the shell cores prepared in the step 2) into the mold cavity prepared in the step 1), cleaning the mold cavity by compressed air, blowing the mold cavity and then closing the mold for pouring after the mold is opened and the integrity of the combined shell core is checked; the pouring temperature is 730 +/-5 ℃;
6) and (3) vibrating to remove the molding sand in the casting cavity, cutting a casting dead head, and polishing and cleaning burrs and fash of the casting.
2. A casting method of a thin-walled aluminum alloy casting according to claim 1, characterized in that: the specific implementation manner of the step 1) is as follows: after the cavity part of the mold is completed, the back surface of the mold is hollowed out, the hollowed bottom surface is inclined by 10-15 degrees from top to bottom according to the requirement of the temperature gradient sequence of the mold, a heating rod mounting hole position is arranged on the inclined surface of 10-15 degrees, the heat-insulating material is wrapped on the inclined surface of 10-15 degrees, the thickness of the heat-insulating material is 3-5 mm, and the heat-insulating material is gradually decreased along the inclined surface of 10-15 degrees.
3. A casting method of a thin-walled aluminum alloy casting according to claim 2, characterized in that: the heat-insulating material is a mixture of heat-insulating asbestos cloth and water glass; the heat-preservation asbestos cloth and the water glass are mixed according to the mass ratio of 1: mixing and stirring uniformly according to the proportion of 1.
4. A casting method of a thin-walled aluminum alloy casting according to claim 1, 2 or 3, characterized in that: the preheating temperature in the step 4) is 240-280 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111509932A (en) * | 2020-04-22 | 2020-08-07 | 绍兴集知汇信息科技有限公司 | Motor housing forming system |
| CN111509931A (en) * | 2020-04-22 | 2020-08-07 | 绍兴集知汇信息科技有限公司 | Aluminum motor shell forming processing method |
| CN111804882A (en) * | 2020-07-20 | 2020-10-23 | 欧盟 | Precision forming process for aluminum alloy die casting blank |
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| CN111509932A (en) * | 2020-04-22 | 2020-08-07 | 绍兴集知汇信息科技有限公司 | Motor housing forming system |
| CN111509931A (en) * | 2020-04-22 | 2020-08-07 | 绍兴集知汇信息科技有限公司 | Aluminum motor shell forming processing method |
| CN111509932B (en) * | 2020-04-22 | 2021-05-04 | 怀远县环宇电机配件有限公司 | Motor housing forming system |
| CN111509931B (en) * | 2020-04-22 | 2021-06-15 | 上海雷祥压铸有限公司 | Aluminum motor shell forming processing method |
| CN111804882A (en) * | 2020-07-20 | 2020-10-23 | 欧盟 | Precision forming process for aluminum alloy die casting blank |
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