An aluminum alloy motor shell casting water-cooled mold

Abstract

The present invention discloses a water-cooled mold for casting an aluminum alloy motor case, comprising a top mold, a side mold and a bottom mold that cooperate with each other, a mold cavity being formed between the top mold, a diverter cone extending toward the bottom mold being provided on the top mold, and a positioning sleeve being further provided, wherein the bottom of the positioning sleeve is circumferentially provided with a plurality of first recesses, the top of the positioning sleeve is circumferentially provided with a plurality of first protrusions that can cooperate with the iron sleeve of the motor case, a second protrusion that cooperates with the first recess is provided in the middle of the bottom mold, the diverter cone is interference fit with the diameter of the positioning sleeve, and the structure further comprises a side mold water-cooling structure provided on the side mold and a bottom mold water-cooling structure provided on the bottom mold. The structure is produced by a low-pressure casting process. Due to the water-cooling process, the density of the casting is high and the quality of the casting is good. At the same time, the metal utilization rate is high and the consumption of auxiliary materials is small. The structure integrally casts the body and the end cover of the motor case, thereby simplifying the production process of the motor case, reducing the weight of the motor case and improving production efficiency.

Description

Technical Field

[0001] The invention relates to a motor housing mold structure, in particular to a water-cooling mold for casting an aluminum alloy motor housing. Background Art

[0002] With the development of society, automobiles have become an indispensable means of transportation. However, while changing the world, they have also accelerated the depletion of fossil fuels and exacerbated global climate change. Under pressure from energy crises, environmental pollution, and the worsening global warming effect, the automotive industry is now turning to new energy vehicles. The motor housing of new energy vehicles is a crucial component of the engine, requiring high casting dimensional accuracy. The internal structure must be dense and free of casting defects such as pores and shrinkage. The casting material must have a tensile strength of ≥275 and an elongation of ≥5%. Furthermore, the casting must be fitted with an iron sleeve, making casting very challenging. Currently, the sand gravity casting process is used for production, but this process has the following drawbacks: high surface roughness; large grains in the internal structure; poor casting performance; a complex and bulky pouring and riser system; low molten aluminum utilization; high molding sand consumption, harsh production environment, and low production efficiency.

[0003] Due to the complex shape and structure of the motor housing, milling is also required to ensure that the iron sleeve is concentric. Therefore, the motor housing blank also needs good machining performance. Therefore, most motor housings are produced by casting and then machining. Due to the small thickness and large area of the shape, the mold must be fast in molding, stable in process, and ensure that the iron sleeve fits the casting. Otherwise, the quality of the products cannot be guaranteed. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a water-cooling die for casting an aluminum alloy motor housing with high production efficiency.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a water-cooling mold for casting an aluminum alloy motor housing, comprising a top mold, side molds and a bottom mold that cooperate with each other, a cavity being formed between the top mold, a diverter cone extending toward the bottom mold, and a positioning sleeve, wherein the bottom of the positioning sleeve is circumferentially provided with a plurality of first recesses, the top of the positioning sleeve is circumferentially provided with a plurality of first protrusions that can cooperate with the iron sleeve of the motor housing, a second protrusion that cooperates with the first recesses is provided in the middle of the bottom mold, and the diameters of the diverter cone and the positioning sleeve are interference fit;

[0006] It also includes a side mold water cooling structure arranged on the side mold and a bottom mold water cooling structure arranged on the bottom mold.

[0007] Furthermore, a plurality of expansion grooves are provided on the diverter cone.

[0008] Furthermore, the width of the expansion groove is 0.15 mm.

[0009] Furthermore, the side mold water cooling structure includes an upper water cooling structure located at the upper section of the side mold and a lower water cooling structure located at the lower section of the side mold;

[0010] The upper water-cooling structure, the lower water-cooling structure and the bottom mold water-cooling structure all include cooling water channels and water inlet and outlet interfaces communicated with the cooling water channels.

[0011] Furthermore, it also includes a heat insulation groove arranged on the side mold, and the heat insulation groove is located on the inner side of the water cooling structure of the side mold.

[0012] Furthermore, a handle is provided on one side of the positioning sleeve.

[0013] Furthermore, the lower surface of the diverter cone is a sloped structure.

[0014] The beneficial effects of the present invention are as follows: the structure is produced by a low-pressure casting process, and due to the use of a water cooling process, the density of the casting is high, the casting quality is good, the metal utilization rate is high, and the consumption of auxiliary materials is low. At the same time, since the body and end cover of the motor housing can be cast as one piece, the production process of the motor housing can be simplified, the weight of the motor housing can be reduced, and the production efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a water-cooling mold for casting an aluminum alloy motor housing.

[0016] Figure 2 Exploded view of the internal structure of the mold for installing the positioning sleeve.

[0017] Figure 3 This is a top view of the motor casing iron sleeve.

[0018] Figure 4 This is a top view of the positioning sleeve.

[0019] Figure 5 This is a bottom view of the positioning sleeve.

[0020] Figure 6 Schematic diagram of bottom mold water cooling.

[0021] Figure 7 Schematic diagram of the upper water cooling structure.

[0022] Figure 8 Schematic diagram of the lower water cooling structure.

[0023] Marked in the figure are: top mold 1, side mold 2, upper water-cooling structure 21, lower water-cooling structure 22, heat insulation groove 23, bottom mold 3, second protrusion 31, bottom mold water-cooling structure 32, diverter cone 4, positioning sleeve 5, first recess 51, first protrusion 52, handle 53, cooling water channel 61, water inlet interface 62, water outlet interface 63, motor housing iron sleeve 7. DETAILED DESCRIPTION

[0024] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] like Figure 1 and Figure 2 The water-cooled mold for casting an aluminum alloy motor housing shown in the figure includes a top mold 1, a side mold 2 and a bottom mold 3 that cooperate with each other, and a cavity is formed between the top mold 1, the side mold 2 and the bottom mold 3. The top mold 1 is provided with a diverter cone 4 extending to the bottom mold 3, and also includes a positioning sleeve 5. The bottom of the positioning sleeve 5 is circumferentially provided with a plurality of first recesses 51, and the top of the positioning sleeve 5 is circumferentially provided with a plurality of first protrusions 52 that can cooperate with the motor housing iron sleeve 7. The middle part of the bottom mold 3 is provided with a second protrusion 31 that cooperates with the first recess 51. The diverter cone 4 and the positioning sleeve 5 have an interference fit in diameter. The mold also includes a side mold water-cooling structure provided on the side mold 2 and a bottom mold water-cooling structure provided on the bottom mold 3. When working, the mold is assembled on On the machine, the side mold 2 is first opened through the driving mechanism of the machine, the top mold 1 is raised, the positioning sleeve 5 is positioned and installed on the bottom mold 3, and then the motor shell iron sleeve 7 is positioned and placed on the positioning sleeve 5, and then the top mold 1 is driven to descend. At this time, the motor shell iron sleeve 7 is sleeved on the wind flow cone, and then the top mold 1 is driven to rise. At this time, the motor shell iron sleeve 7 will rise together with the diverter cone 4, and then the positioning sleeve 5 is taken out, the top mold 1 is driven to descend, and the side mold 2 is closed for normal production. Due to the setting of the water cooling structure, the product density after production is high and the casting quality is good. At the same time, since it can cast the body and end cover of the motor shell as one, it can simplify the production process of the motor shell, reduce the weight of the motor shell, and improve production efficiency.

[0027] On the basis of the above, a plurality of expansion grooves are provided on the diverter cone 4. In this embodiment, the width of the expansion groove is 0.15 mm, which can also be adjusted according to actual conditions. The setting of the expansion groove can enable the diverter cone 4 to be squeezed into the motor housing iron sleeve 7, so that the motor housing iron sleeve 7 is tightly mounted on the diverter cone 4.

[0028] On the basis of the above, the side mold water cooling structure includes an upper water cooling structure 21 located at the upper section of the side mold 2 and a lower water cooling structure 22 located at the lower section of the side mold 2; the upper water cooling structure 21, the lower water cooling structure 22 and the bottom mold water cooling structure all include a cooling water channel 61 and an inlet interface 62 and an outlet interface 63 connected to the cooling water channel 61. The mold can ensure the high density and good quality of the castings after production through the setting of multiple water cooling structures, while also having a high metal utilization rate and low consumption of auxiliary materials.

[0029] On the basis of the above, it also includes a heat insulation groove 23 set on the side mold 2. The heat insulation groove 23 is located on the inner side of the water cooling structure of the side mold. The heat insulation groove 23 can be set according to the specific structure of the product. When some areas do not need to be cooled, heat insulation treatment can be performed through the heat insulation groove 23.

[0030] On the basis of the above, a handle 53 is provided on one side of the positioning sleeve 5. The provision of the handle 53 can facilitate the removal of the positioning sleeve 5 before normal injection production.

[0031] On the basis of the above, the lower surface of the diverter cone 4 is a sloped structure, and the slope can be set according to the specific situation. In this embodiment, the slope pressing angle is 20°. This setting can ensure that the diverter cone 4 can be accurately pressed into the motor housing iron sleeve 7, ensuring the smooth progress of subsequent production.

[0032] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water-cooled mold for casting an aluminum alloy motor housing, comprising a top mold (1), a side mold (2) and a bottom mold (3) that cooperate with each other, wherein a cavity is formed between the top mold (1), the side mold (2) and the bottom mold (3), and a diverter cone (4) extending toward the bottom mold (3) is provided on the top mold (1), characterized in that: It also includes a positioning sleeve (5), wherein the bottom of the positioning sleeve (5) is circumferentially provided with a plurality of first notches (51), the top of the positioning sleeve (5) is circumferentially provided with a plurality of first protrusions (52) that can cooperate with the motor housing iron sleeve (7), the middle of the bottom mold (3) is provided with a second protrusion (31) that cooperates with the first notches (51), and the diameters of the diverter cone (4) and the positioning sleeve (5) are interference fit; It also includes a side mold water cooling structure provided on the side mold (2) and a bottom mold water cooling structure provided on the bottom mold (3); The diverter cone (4) is provided with a plurality of expansion grooves; The side mold water cooling structure comprises an upper water cooling structure (21) located at the upper section of the side mold (2) and a lower water cooling structure (22) located at the lower section of the side mold (2); The upper water-cooling structure (21), the lower water-cooling structure (22) and the bottom mold water-cooling structure all include a cooling water channel (61) and a water inlet interface (62) and a water outlet interface (63) communicated with the cooling water channel (61); It also includes a heat-insulating groove (23) provided on the side mold (2), wherein the heat-insulating groove (23) is located inside the water-cooling structure of the side mold.

2. The water-cooling mold for casting an aluminum alloy motor housing according to claim 1, characterized in that: The width of the expansion groove is 0.15 mm.

3. The water-cooling mold for casting an aluminum alloy motor housing according to claim 1, characterized in that: A handle (53) is provided on one side of the positioning sleeve (5).

4. The water-cooling mold for casting an aluminum alloy motor housing according to claim 1, characterized in that: The lower surface of the diverter cone (4) is a sloped structure.

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