Casting method of motor shell with spiral water channel
By adopting a method with spiral waterway in motor housing casting, the manufacturing process of white molds is simplified, the manufacturing efficiency and product quality are improved, and the problem of difficulty in manufacturing white molds in the prior art is solved.
Patent Information
- Application Number
- CN202410137184.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-01-03
AI Technical Summary
In the existing method of casting of disappearing molds, it is difficult to manufacture the white mold of the motor shell, especially because the bonding process of several arc-shaped dies is complicated, which affects the manufacturing efficiency of the motor shell.
Using the motor shell casting method with spiral waterway, the molded shell mold and inner cylinder mold sheet are made through molds, and spiral protrusions and concaves are respectively set to form spiral waterways, and bonded through adhesives, simplifying the manufacturing process of the white mold. , ensuring rapid molding and mold release of the motor housing.
It reduces the difficulty of manufacturing the white mold, improves the manufacturing efficiency of the motor shell, enhances the stiffness and wall thickness of the spiral waterway, ensures product quality, and simplifies the subsequent cleaning and forming process.
Smart Images
Figure CN119237669A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of lost foam casting, and in particular to a method for casting a motor housing with a spiral water channel. Background Art
[0002] Lost foam casting is currently a recognized and relatively advanced high-precision casting method, which is usually used to manufacture castings with complex shapes, such as motor housings. Specifically, lost foam casting is to place a foam plastic white mold consistent with the molded part into a sand box, so that the white mold is buried in dry sand, and then the sand box is vacuumed to make the dry sand fit tightly to the white mold, and finally the molten metal is poured into the sand box through a pouring pipe. The white mold is directly vaporized under the high temperature of the molten metal, and then the white mold is gradually replaced by the molten metal, so that a molded part consistent with the white mold is replicated in the sand box.
[0003] In the existing related technologies, the motor housing is usually provided with a junction box protruding therefrom, and a spiral water channel for water cooling is usually provided inside the motor housing. In order to facilitate the molding of the motor housing white mold, the white mold is usually divided into a box mold piece and a plurality of arc-shaped mold pieces, which are manufactured and molded separately. When the white mold is subsequently manufactured, the plurality of arc-shaped mold pieces need to be bonded to form the main body of the white mold by adhesive, and then the box mold piece is bonded to the main body of the white mold by adhesive, thereby completing the manufacturing of the complete white mold.
[0004] With regard to the above-mentioned related technologies, it is rather complicated to bond several arc-shaped mold pieces into a complete white mold by adhesive, which affects the manufacturing efficiency of the motor housing. Summary of the invention
[0005] In order to reduce the difficulty of manufacturing the white mold and thus ensure the manufacturing efficiency of the motor housing, the present application provides a method for casting a motor housing with a spiral water channel.
[0006] The motor housing casting method with spiral water channel provided in the present application adopts the following technical solution: A method for casting a motor housing with a spiral water channel comprises the following steps: S1, forming a white mold of a motor housing by a mold; The motor housing white mold in step S1 includes a housing mold and an inner cylinder mold; a housing cavity is provided inside the housing mold, and a housing spiral protrusion is provided on the inner wall of the housing cavity, and the thickness dimension of one end of the housing spiral protrusion is smaller than the thickness dimension of the other end thereof, and the end of the housing spiral protrusion with a smaller thickness dimension is arranged away from the housing mold; The outer circumferential surface of the inner cylinder die is provided with an inner cylinder spiral protrusion arranged corresponding to the outer shell spiral protrusion, the thickness dimension of one end of the inner cylinder spiral protrusion is smaller than the thickness dimension of the other end thereof, and the end of the inner cylinder spiral protrusion with a smaller thickness dimension is arranged away from the inner cylinder die; S2, coating adhesive on the outer surfaces of the outer shell mold piece, the inner cylinder mold piece, the outer shell spiral protrusion and the inner cylinder spiral protrusion; S3, sleeve the outer shell mold piece on the inner cylinder mold piece along the axial direction of the inner cylinder mold piece; In the step S3, after the outer shell mold is sleeved on the inner cylinder mold, the outer shell spiral protrusion is bonded and matched with the inner cylinder spiral protrusion to form a spiral water channel.
[0007] By adopting the above technical solution, the outer shell mold piece and the inner cylinder mold piece are formed in one piece, and then the outer shell mold piece and the inner cylinder mold piece are bonded together by an adhesive, which is convenient and quick. It reduces the need to bond several arc-shaped mold pieces to form the main body of the motor shell white mold, thereby reducing the difficulty of manufacturing the white mold, thereby ensuring the manufacturing efficiency of the motor shell.
[0008] In addition, a spiral water channel is formed by the outer shell spiral protrusion and the inner cylinder spiral protrusion respectively arranged on the outer shell mold piece and the inner cylinder mold piece, thereby reducing the height dimensions of the outer shell spiral protrusion and the inner cylinder spiral protrusion, ensuring the rigidity of the outer shell spiral protrusion and the inner cylinder spiral protrusion, and making the outer shell spiral protrusion and the inner cylinder spiral protrusion less likely to be damaged or broken during molding and demolding.
[0009] In addition, in order to meet the demolding angle requirements for quick demolding and thus ensure the manufacturing efficiency of the motor housing, the thickness dimension of one end of the spiral protrusion of the outer shell is smaller than the thickness dimension of the other end thereof, and the thickness dimension of one end of the spiral protrusion of the inner cylinder is smaller than the thickness dimension of the other end thereof. Compared with the case where the spiral protrusion of the outer shell and the spiral protrusion of the inner cylinder are taken as a whole to form a spiral water channel, the wall thickness of the spiral protrusion of the outer shell and the spiral protrusion of the inner cylinder as a whole, i.e., the spiral water channel, can be better guaranteed, and it is not easy for the wall thickness of the spiral water channel to be too small due to the demolding angle requirements, thereby ensuring the product quality of the motor housing.
[0010] Optionally, the motor housing white mold in step S1 further includes a top cover mold, the top cover mold is integrally connected to a top cover box mold, and the housing mold is integrally connected to a housing box mold; In the step S2, it is also necessary to apply adhesive on the outer surfaces of the top cover box body mold piece and the outer shell box body mold piece; In the step S3, after the outer shell mold is sleeved on the inner cylinder mold, the top cover mold is bonded to the outer shell mold along the axial direction of the inner cylinder mold; After the top cover mold is bonded and matched with the outer shell mold, the top cover box body mold is bonded and matched with the outer shell box body mold to form a junction box blank mold.
[0011] By adopting the above technical solution, the junction box white mold is formed by bonding the top cover box mold and the outer shell box mold, which reduces the molding difficulty of the top cover box mold and the outer shell box mold. Compared with the situation where the top cover box mold and the outer shell box mold are integrally molded directly on the top cover mold, it is not easy to have too large a thickness change between the outer shell box mold and the top cover mold, thereby reducing the adverse effect of the shrinkage deformation of the foam plastic molding on the molding of the outer shell box mold and the top cover mold, which is conducive to ensuring the molding quality of the top cover box mold and the outer shell box mold.
[0012] Optionally, the following steps are also included: S4, impregnating the outer shell mold piece and the inner cylinder mold piece with a refractory coating; S5, filling dry sand into the spiral water channel through the process hole; The process hole in the step S5 is opened on the outer peripheral surface of the shell mold, and the process hole is connected to the spiral water channel.
[0013] By adopting the above technical solution, the spiral water channel is first filled with dry sand, which is conducive to ensuring that the spiral water channel is densely filled with dry sand.
[0014] Optionally, in the step S5, when dry sand is filled into the spiral water channel through the process hole, the axis of the shell mold is arranged in the horizontal direction.
[0015] By adopting the above technical solution, after the dry sand enters the bolt waterway from the process hole, it moves along the spiral waterway to the bottom position of the spiral waterway under the action of gravity and then fills the spiral waterway evenly from bottom to top, which is conducive to further ensuring that the spiral waterway is densely filled with dry sand.
[0016] Optionally, the following steps are also included: S6, placing the outer shell mold piece and the inner cylinder mold piece into a sand box, burying the outer shell mold piece and the inner cylinder mold piece with dry sand, vibrating and compacting the dry sand in the sand box, and vacuuming the sand box; S7, pouring molten metal into the sand box through a pouring pipe; S8, taking out the outer shell mold piece and the inner cylinder mold piece from the sand box, removing the casting pipeline, and cleaning the sand residue in the spiral water channel through the process hole.
[0017] Optionally, a shell glue groove is provided at one end of the shell spiral protrusion away from the shell mold piece, and the extension direction of the shell glue groove is consistent with the extension direction of the shell spiral protrusion; An inner cylinder rubber groove is formed at one end of the inner cylinder spiral protrusion away from the inner cylinder mold piece, and the extension direction of the inner cylinder rubber groove is consistent with the extension direction of the inner cylinder spiral protrusion; The adhesive applied to the spiral protrusion of the outer shell in step S2 is located inside the outer shell adhesive groove, and the adhesive applied to the spiral protrusion of the inner cylinder in step S2 is located inside the inner cylinder adhesive groove.
[0018] By adopting the above technical solution, on the one hand, it is easy to apply the adhesive to the outer shell spiral protrusion or the inner cylinder spiral protrusion, so that the operator is not easy to apply the adhesive to the outside of the outer shell spiral protrusion or the inner cylinder spiral protrusion. On the other hand, the adhesive is applied to the inside of the outer shell glue groove or the inner cylinder glue groove, so that when the outer shell mold is sleeved on the inner cylinder mold along the axial direction of the inner cylinder mold, that is, in step S3, the adhesive is not easy to be scraped off by the outer shell spiral protrusion or the inner cylinder spiral protrusion, thereby ensuring the bonding strength between the outer shell mold and the inner cylinder mold. The adhesive is not easy to be scraped off and the dry sand is not easy to be bonded into blocks by the adhesive, which is convenient for the subsequent cleaning of the bolt waterway.
[0019] Optionally, in the step S3, before the outer shell mold piece is sleeved on the inner cylinder mold piece along the axial direction of the inner cylinder mold piece, a plurality of outer shell fireproof cottons are wound around the inner wall of the outer shell cavity, and a plurality of inner cylinder fireproof cottons are wound around the outer circumference of the inner cylinder mold piece; The winding directions of the plurality of outer shell fireproof cottons are consistent with the extension direction of the outer shell spiral protrusions, the winding directions of the plurality of inner cylinder fireproof cottons are consistent with the extension direction of the inner cylinder spiral protrusions, and the plurality of outer shell fireproof cottons and the plurality of inner cylinder fireproof cottons are all located in the spiral waterway; The tolerable temperature of some of the outer shell fireproof cottons and some of the inner tube fireproof cottons is greater than the casting temperature.
[0020] By adopting the above technical scheme, the spiral water channel is filled with a plurality of outer shell fireproof cottons and a plurality of inner cylinder fireproof cottons. On the one hand, it is convenient to ensure the forming of the spiral water channel in the early stage, and on the other hand, it is convenient to extract the plurality of outer shell fireproof cottons and a plurality of inner cylinder fireproof cottons from the formed spiral water channel in the later stage, which not only facilitates the forming of the spiral water channel, but also facilitates the cleaning of the spiral water channel, thereby ensuring the manufacturing efficiency of the motor casing.
[0021] Optionally, some of the fireproof cottons of the outer shell are distributed in layers, and the thickness of some of the fireproof cottons of the outer shell is less than 3 mm; The fireproof cottons in some of the inner tubes are distributed in layers, and the thickness of the fireproof cottons in some of the inner tubes is less than 3 mm.
[0022] By adopting the above technical scheme, the outer shell fireproof cotton and the inner tube fireproof cotton with a thickness of less than 3mm are convenient for later extraction of a plurality of outer shell fireproof cotton and a plurality of inner tube fireproof cotton from the formed spiral water channel, thereby facilitating the cleaning of the spiral water channel.
[0023] Optionally, in the S3 step, before winding a plurality of outer shell fireproof cottons around the inner wall of the outer shell cavity or winding a plurality of inner tube fireproof cottons around the outer circumference of the inner tube mold piece, a plurality of outer shell fireproof cottons away from the inner wall of the outer shell cavity or an inner tube fireproof cotton away from the outer circumference of the inner tube mold piece are impregnated with a fire-resistant coating.
[0024] By adopting the above technical scheme, the refractory coating makes it difficult for the molten metal to penetrate into the gaps of the outer shell fireproof cotton or the inner tube fireproof cotton, which is not only conducive to ensuring the smoothness of the inner wall of the spiral water channel, but also convenient for the later extraction of the outer shell fireproof cotton and the inner tube fireproof cotton from the formed spiral water channel, thereby reducing the occurrence of the outer shell fireproof cotton or the inner tube fireproof cotton sticking to the inner wall of the spiral water channel.
[0025] Optionally, the following steps are also included: S4, placing the outer shell mold piece and the inner cylinder mold piece into a sand box, burying the outer shell mold piece and the inner cylinder mold piece with dry sand, and vibrating the dry sand in the sand box to make it dense; S5, pouring molten metal into the sand box through a pouring pipe; S6. Take out the outer shell mold and the inner tube mold from the sand box, remove the casting pipeline, and take out a plurality of outer shell fireproof cottons and a plurality of inner tube fireproof cottons from the spiral water channel through the process hole.
[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The outer shell mold and the inner cylinder mold are formed in one piece, and then the outer shell mold and the inner cylinder mold are bonded together by adhesive, which is convenient and quick. It reduces the need to bond several arc-shaped molds into the main body of the motor shell white mold, thereby reducing the difficulty of manufacturing the white mold, thereby ensuring the manufacturing efficiency of the motor shell.
[0027] In addition, a spiral water channel is formed by the outer shell spiral protrusion and the inner cylinder spiral protrusion respectively arranged on the outer shell mold piece and the inner cylinder mold piece, thereby reducing the height dimensions of the outer shell spiral protrusion and the inner cylinder spiral protrusion, ensuring the rigidity of the outer shell spiral protrusion and the inner cylinder spiral protrusion, and making the outer shell spiral protrusion and the inner cylinder spiral protrusion less likely to be damaged or broken during molding and demolding.
[0028] In addition, in order to meet the demolding angle requirements for quick demolding and thus ensure the manufacturing efficiency of the motor housing, the thickness dimension of one end of the spiral protrusion of the outer shell is smaller than the thickness dimension of the other end thereof, and the thickness dimension of one end of the spiral protrusion of the inner cylinder is smaller than the thickness dimension of the other end thereof. Compared with the case where the spiral protrusion of the outer shell and the spiral protrusion of the inner cylinder are taken as a whole to form a spiral water channel, the wall thickness of the spiral protrusion of the outer shell and the spiral protrusion of the inner cylinder as a whole, i.e., the spiral water channel, can be better guaranteed, and it is not easy for the wall thickness of the spiral water channel to be too small due to the demolding angle requirements, thereby ensuring the product quality of the motor housing.
[0029] 2. On the one hand, it is easy to apply the adhesive to the outer shell spiral protrusion or the inner cylinder spiral protrusion, so that the operator is not easy to apply the adhesive to the outside of the outer shell spiral protrusion or the inner cylinder spiral protrusion. On the other hand, the adhesive is applied to the inside of the outer shell glue groove or the inner cylinder glue groove, so that when the outer shell mold is sleeved on the inner cylinder mold along the axial direction of the inner cylinder mold, that is, in step S3, the adhesive is not easy to be scraped off by the outer shell spiral protrusion or the inner cylinder spiral protrusion, thereby ensuring the bonding strength between the outer shell mold and the inner cylinder mold. The adhesive is not easy to be scraped off and the dry sand is not easy to be bonded into blocks by the adhesive, which is convenient for the subsequent cleaning of the bolt waterway.
[0030] 3. Filling the spiral water channel with a plurality of outer shell fireproof cottons and a plurality of inner cylinder fireproof cottons is, on the one hand, convenient for ensuring the forming of the spiral water channel in the early stage, and on the other hand, convenient for extracting the plurality of outer shell fireproof cottons and a plurality of inner cylinder fireproof cottons from the formed spiral water channel in the later stage, which is not only convenient for the forming of the spiral water channel, but also convenient for the cleaning of the spiral water channel, thereby ensuring the manufacturing efficiency of the motor casing. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is an overall schematic diagram of the overall structure of Example 1 of the present application.
[0032] Figure 2 It is a schematic diagram of the matching relationship between the outer shell mold and the inner cylinder mold in Example 1 of the present application.
[0033] Figure 3 It is an exploded schematic diagram of the overall structure of Example 1 of the present application.
[0034] Figure 4 yes Figure 2 An enlarged schematic diagram of part A.
[0035] Figure 5 It is a schematic diagram of the matching relationship between the outer shell mold and the inner tube mold in Example 2 of the present application.
[0036] Figure 6 yes Figure 5 An enlarged schematic diagram of part B.
[0037] Figure 7 It is a schematic diagram of the matching relationship between the outer shell mold and the inner cylinder mold in Example 3 of the present application.
[0038] Figure 8 yes Figure 7 Enlarged schematic diagram of part C of FIG.
[0039] Explanation of the accompanying drawings: 1. Shell mold; 101. Shell water channel; 102. Process hole; 103. Positioning groove; 11. Shell spiral protrusion; 111. Shell glue groove; 12. Shell box body mold; 13. Shell fireproof cotton; 2. Inner cylinder mold; 201. Inner cylinder water channel; 21. Inner cylinder spiral protrusion; 211. Inner cylinder glue groove; 22. Cooling spiral protrusion; 23. Inner cylinder fireproof cotton; 3. Top cover mold; 31. Top cover box body mold; 311. Positioning protrusion; 4. Spiral water channel. DETAILED DESCRIPTION
[0040] The following is combined with Figure 1-8 This application is described in further detail.
[0041] Example 1.
[0042] The present application discloses a method for casting a motor housing with a spiral water channel. The method for casting a motor housing with a spiral water channel includes the following specific steps: S1. A white mold of a motor housing is produced by a mold.
[0043] Reference Figure 1 and Figure 2 The motor housing white film in step S1 includes a housing mold piece 1, an inner cylinder mold piece 2 and a top cover mold piece 3. The housing mold piece 1 is cylindrical, and a housing cavity is provided inside the housing mold piece 1, and the housing cavity is arranged through the housing mold piece 1 along the axial direction.
[0044] Reference Figure 2 and Figure 3 , the inner wall of the shell cavity is provided with a shell spiral protrusion 11, and a shell water channel 101 is formed between the shell spiral protrusion 11 and the inner wall of the shell cavity. The thickness dimension of one end of the shell spiral protrusion 11 is smaller than the thickness dimension of the other end thereof, and in the embodiment of the present application, the cross-section of the shell spiral protrusion 11 is set in a trapezoidal shape corresponding to the demoulding slope required by the design. Specifically, the demoulding slope refers to the specific value of the angle produced by the contraction of the protruding part of the product along the demoulding direction in order to facilitate the demoulding of the product. In the embodiment of the present application, the demoulding slope of the shell spiral protrusion 11 is 1°, that is, the angle between the inclined surface of the shell spiral protrusion 11 and the radial direction of the shell mold piece 1 is 1°.
[0045] In addition, the end with a larger thickness dimension of the shell spiral protrusion 11 is integrally connected to the inner wall of the shell cavity, and the end with a smaller thickness dimension of the shell spiral protrusion 11 is arranged away from the shell mold 1, so as to facilitate the molding of the shell spiral protrusion 11 by the mold and reduce the occurrence of damage to the shell spiral protrusion 11 during demolding.
[0046] Reference Figure 3The outer circumferential surface of the shell mold 1 is provided with a plurality of process holes 102, and the plurality of process holes 102 are divided into four groups, and the four groups of process holes 102 are evenly distributed around the axis of the shell mold 1, and each group of process holes 102 is distributed along the axis direction of the shell mold 1. Reference Figure 3 , the inner cylinder mold piece 2 is cylindrical, and the diameter of the inner cylinder mold piece 2 is smaller than the inner diameter of the outer shell cavity. The outer circumference of the inner cylinder mold piece 2 is provided with an inner cylinder spiral protrusion 21 corresponding to the outer shell spiral protrusion 11, and an inner cylinder waterway 201 is formed between the inner cylinder spiral protrusion 21 and the outer circumference of the inner cylinder mold piece 2. The thickness of one end of the inner cylinder spiral protrusion 21 is smaller than the thickness of the other end, and in the embodiment of the present application, the cross section of the inner cylinder spiral protrusion 21 is a trapezoidal setting corresponding to the demoulding slope required by the design, and the demoulding slope of the inner cylinder spiral protrusion 21 is also 1°, that is, the angle between the inclined surface of the inner cylinder spiral protrusion 21 and the radial direction of the outer shell mold piece 1 is 1°.
[0047] The end with a larger thickness dimension of the inner cylinder spiral protrusion 21 is integrally connected to the outer peripheral surface of the inner cylinder mold piece 2, and the end with a smaller thickness dimension of the inner cylinder spiral protrusion 21 is arranged away from the inner cylinder mold piece 2, so as to facilitate the inner cylinder spiral protrusion 21 to be molded by the mold, and reduce the occurrence of damage to the inner cylinder spiral protrusion 21 during demolding. In addition, the inner wall of the inner cylinder waterway 201 is integrally connected with a plurality of cooling spiral protrusions 22, and the extension direction of the plurality of cooling spiral protrusions 22 is consistent with the extension direction of the inner cylinder spiral protrusion 21, so as to increase the surface area of the inner cylinder waterway 201, thereby ensuring the cooling effect of the motor housing.
[0048] Reference Figure 3 A positioning groove 103 is formed at one end of the housing mold 1, and the positioning groove 103 extends circumferentially around the axis of the housing mold 1, and the notches at both ends of the positioning groove 103 are inclined toward the bottom of the positioning groove 103. The housing box mold 12 is integrally connected to one end of the housing mold 1 where the positioning groove 103 is formed, and the housing box mold 12 is disposed close to the positioning groove 103.
[0049] The top cover mold 3 is arranged in a circular shape, and is integrally connected to a top cover box body mold 31, and the top cover box body mold 31 is integrally connected to a positioning protrusion 311 arranged corresponding to the positioning groove 103, so as to facilitate the operator to align when assembling the top cover mold 3, so that the top cover box body mold 31 and the outer shell box body mold 12 are combined into a white mold of the junction box.
[0050] S2, coating adhesive on the outer surfaces of the outer shell mold 1, the inner cylinder mold 2, the outer shell spiral protrusion 11, the inner cylinder spiral protrusion 21, the top cover box mold 31 and the outer shell box mold 12. Specifically, the thickness of the coated adhesive is 0.3-0.5 mm.
[0051] S3, sleeve the outer shell mold 1 on the inner cylinder mold 2 along the axial direction of the inner cylinder mold 2, and then bond the top cover mold 3 to the outer shell mold 1 along the axial direction of the inner cylinder mold 2.
[0052] Reference Figure 4 Specifically, in step S3, after the outer shell mold 1 is sleeved on the inner cylinder mold 2, the outer shell spiral protrusion 11 is bonded and matched with the inner cylinder spiral protrusion 21 and the outer shell water channel 101 is connected to the inner cylinder water channel 201 to form a spiral water channel 4; after the top cover mold 3 is bonded and matched with the outer shell mold 1, the top cover box body mold 31 is bonded and matched with the outer shell box body mold 12 to form a junction box white mold, and the positioning protrusion 311 is plugged and matched with the positioning groove 103.
[0053] S4, impregnating the outer shell mold piece 1 and the inner cylinder mold piece 2 with a refractory coating. Specifically, in the embodiment of the present application, the refractory coating is a lost foam casting coating.
[0054] S5, filling the spiral water channel 4 with dry sand through the process hole 102. Specifically, in step S5, when filling the spiral water channel 4 with dry sand through the process hole 102, the shell mold 1 needs to be vibrated so that the dry sand is densely filled in the spiral water channel 4. In addition, the dry sand needs to be filled into the spiral water channel 4 from the top of the shell mold 1, and the axis of the shell mold 1 is arranged in the horizontal direction, so that after the dry sand enters the bolt water channel from the process hole 102, it moves along the spiral water channel 4 under the action of gravity and accumulates at the bottom of the spiral water channel 4, and then the spiral water channel 4 is evenly filled from bottom to top in the vertical direction, which is conducive to further ensuring that the spiral water channel 4 is densely filled with dry sand.
[0055] S6. Place the outer shell mold 1 and the inner cylinder mold 2 into a sand box, bury the outer shell mold 1 and the inner cylinder mold 2 with dry sand, vibrate the dry sand in the sand box to make it dense, and evacuate the sand box.
[0056] S7, pouring molten metal into the sand box through a pouring pipe; S8, taking out the outer shell mold 1 and the inner tube mold 2 from the sand box, removing the casting pipeline, and cleaning the sand residue in the spiral water channel 4 through the process hole 102.
[0057] The implementation principle of the motor housing casting method with spiral water channel in Example 1 of the present application is: integrally forming the housing mold piece 1, the inner cylinder mold piece 2 and the top cover mold piece 3, and then sleeve the housing mold piece 1 on the inner cylinder mold piece 2, so that the housing mold piece 1 is bonded and matched with the inner cylinder mold piece 2, and finally the top cover mold piece 3 is bonded and matched with one end of the housing mold piece 1, thereby completing the manufacture of the motor housing white film. Compared with the manufacture of the motor housing white film by bonding and matching the box mold piece and a plurality of arc-shaped mold pieces, not only the bonding workload is reduced, but also the molding difficulty of the housing mold piece 1, the inner cylinder mold piece 2 and the top cover mold piece 3 is reduced, thereby reducing the manufacturing difficulty of the white mold and ensuring the manufacturing efficiency of the motor housing.
[0058] Embodiment 2. The main differences between Embodiment 2 of the present application and Embodiment 1 are: the specific configurations of the outer shell spiral protrusion 11 and the inner barrel bolt protrusion are different; and the specific configurations of step S2 are different.
[0059] Reference Figure 5 and Figure 6 The outer shell spiral protrusion 11 has an outer shell glue groove 111 at one end away from the outer shell mold piece 1, and the extension direction of the outer shell glue groove 111 is consistent with the extension direction of the outer shell spiral protrusion 11. The inner cylinder spiral protrusion 21 has an inner cylinder glue groove 211 at one end away from the inner cylinder mold piece 2, and the extension direction of the inner cylinder glue groove 211 is consistent with the extension direction of the inner cylinder spiral protrusion 21.
[0060] S2, applying adhesive to the outer surfaces of the outer shell mold 1, the inner cylinder mold 2, the outer shell spiral protrusion 11, the inner cylinder spiral protrusion 21, the top cover box body mold 31, and the outer shell box body mold 12. Specifically, when applying the adhesive to the outer shell spiral protrusion 11, the adhesive is applied and filled in the outer shell adhesive groove 111, and when applying the adhesive to the inner cylinder spiral protrusion 21, the adhesive is applied and filled in the inner cylinder adhesive groove 211.
[0061] Specifically, the bottom inner wall of the outer shell glue groove 111 away from the notch and the bottom inner wall of the inner shell glue groove away from the notch are both arc-shaped, so as to facilitate the outer shell glue groove 111 and the inner shell glue groove to be molded by a mold, thereby reducing the adverse effects of shrinkage stress on the outer shell glue groove 111 and the inner shell glue groove.
[0062] The implementation principle of a method for casting a motor casing with a spiral water channel in Example 2 of the present application is as follows: by coating and filling the adhesive in the outer casing glue groove 111 or the inner cylinder glue groove 211, it is difficult for the operator to fill the adhesive in other positions of the outer casing mold 1, and it is also difficult for the adhesive to be scraped off by the outer casing mold 1 or the inner cylinder mold 2 when the outer casing mold 1 is sleeved on the inner cylinder mold 2, which is beneficial to ensure the bonding strength and reduce the amount of block dry sand solidified by the adhesive.
[0063] Example 3.
[0064] The main differences between Example 3 of the present application and Example 1 are: the arrangement of the spiral water channel 4 is different; and the specific steps of the method for casting a motor housing with a spiral water channel are different.
[0065] Reference Figure 7 and Figure 8 The inner wall of the inner tube water channel 201 is smoothly arranged, and the inner wall of the outer shell water channel 101 is also smoothly arranged.
[0066] S1. A white mold of a motor housing is produced by a mold.
[0067] S2, coating adhesive on the outer surfaces of the outer shell mold 1, the inner cylinder mold 2, the outer shell spiral protrusion 11, the inner cylinder spiral protrusion 21, the top cover box body mold 31 and the outer shell box body mold 12.
[0068] S3, impregnating a plurality of outer shell fireproof cottons 13 and a plurality of inner tube fireproof cottons 23 into the fireproof coating, and then winding and fixing the plurality of outer shell fireproof cottons 13 impregnated with the fireproof coating layer by layer in the outer shell waterway 101, and then winding and fixing the plurality of outer shell fireproof cottons 13 not impregnated with the fireproof coating layer by layer in the outer shell waterway 101; A plurality of inner cylinder fireproof cottons 23 impregnated with the fireproof coating are wound layer by layer and fixed in the inner cylinder waterway 201, and then a plurality of inner cylinder fireproof cottons 23 not impregnated with the fireproof coating are wound layer by layer and fixed in the inner cylinder waterway 201; Then, the outer shell mold 1 is sleeved on the inner cylinder mold 2 along the axial direction of the inner cylinder mold 2 , and finally, the top cover mold 3 is bonded and matched to the outer shell mold 1 along the axial direction of the inner cylinder mold 2 .
[0069] By impregnating a plurality of outer shell fireproof cottons 13 and a plurality of inner tube fireproof cottons 23 in a refractory coating, it is easier for metal to penetrate into the outer shell fireproof cotton 13 or the inner tube fireproof cotton 23 during casting, which is beneficial for ensuring the smoothness of the inner wall of the spiral water channel 4 and reducing the occurrence of the outer shell fireproof cotton 13 or the inner tube fireproof cotton 23 sticking to the inner wall of the spiral water channel 4.
[0070] Reference Figure 8 Specifically, in step S3, a plurality of shell fireproof cottons 13 are distributed in layers along the depth direction of the shell water channel 101, and the shell fireproof cottons 13 impregnated in the fireproof coating are arranged close to the shell mold piece 1, and the shell fireproof cottons 13 not impregnated in the fireproof coating are arranged away from the shell mold piece 1. The thickness of the plurality of shell fireproof cottons 13 is less than 3 mm, and the winding direction of the plurality of shell fireproof cottons 13 is consistent with the extension direction of the shell spiral protrusion 11; The plurality of inner cylinder fireproof cottons 23 are distributed in layers along the depth direction of the inner cylinder water channel 201, and the inner cylinder fireproof cottons 23 impregnated in the fireproof coating are arranged close to the inner cylinder mold piece 2, and the inner cylinder fireproof cottons 23 not impregnated in the fireproof coating are arranged away from the inner cylinder mold piece 2. The thickness of the plurality of inner cylinder fireproof cottons 23 is less than 3 mm, and the winding direction of the plurality of inner cylinder fireproof cottons 23 is consistent with the extension direction of the inner cylinder spiral protrusion 21; In addition, the resistant temperature of several outer shell fireproof cottons 13 and several inner tube fireproof cottons 23 is greater than the casting temperature of 60°C, and in the embodiment of the present application, the types of the outer shell fireproof cottons 13 and the inner tube fireproof cottons 23 are both selected as needle-punched blankets containing cobalt and alumina.
[0071] S4, putting the outer shell mold piece 1, the inner tube mold piece 2 and the top cover mold piece 3 into a sand box, burying the outer shell mold piece 1 and the inner tube mold piece 2 with dry sand, and vibrating the dry sand in the sand box to make it dense.
[0072] S5. Pour the molten metal into the sand box through the pouring pipe.
[0073] S6. Take out the outer shell mold 1, the inner tube mold 2 and the top cover mold 3 from the sand box, remove the casting pipeline, and take out a number of outer shell fireproof cottons 13 and a number of inner tube fireproof cottons 23 from the spiral water channel 4 through the process hole 102.
[0074] The implementation principle of the method for casting a motor casing with a spiral water channel in Example 3 of the present application is as follows: a spiral water channel 4 is formed by a plurality of outer casing fireproof cottons 13 and a plurality of inner tube fireproof cottons 23, thereby reducing the need to fill the spiral water channel 4 with dry sand and also reducing the need to clean the dry sand in the spiral water channel 4, thereby ensuring the manufacturing efficiency of the motor casing.
[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A method for casting a motor housing with a spiral water channel, characterized in that: The following steps are involved: S1, forming a white mold of a motor housing by a mold; The motor housing blank mold in step S1 comprises a housing mold piece (1) and an inner cylinder mold piece (2); a housing cavity is provided inside the housing mold piece (1), and a housing spiral protrusion (11) is provided on the inner wall of the housing cavity; the thickness dimension of one end of the housing spiral protrusion (11) is smaller than the thickness dimension of the other end thereof, and the end of the housing spiral protrusion (11) with a smaller thickness dimension is arranged away from the housing mold piece (1); The outer circumferential surface of the inner cylinder mold piece (2) is provided with an inner cylinder spiral protrusion (21) arranged corresponding to the outer shell spiral protrusion (11), the thickness dimension of one end of the inner cylinder spiral protrusion (21) is smaller than the thickness dimension of the other end thereof, and the end of the inner cylinder spiral protrusion (21) with a smaller thickness dimension is arranged away from the inner cylinder mold piece (2); S2, coating adhesive on the outer surfaces of the outer shell mold piece (1), the inner cylinder mold piece (2), the outer shell spiral protrusion (11) and the inner cylinder spiral protrusion (21); S3, sleeve the outer shell mold piece (1) onto the inner cylinder mold piece (2) along the axial direction of the inner cylinder mold piece (2); In the step S3, after the outer shell mold (1) is sleeved on the inner cylinder mold (2), the outer shell spiral protrusion (11) is bonded and matched with the inner cylinder spiral protrusion (21) to form a spiral water channel (4).
2. The method for casting a motor housing with a spiral water channel according to claim 1, characterized in that: The motor housing white mold in step S1 further comprises a top cover mold (3), wherein the top cover mold (3) is integrally connected to a top cover box mold (31), and the housing mold (1) is integrally connected to a housing box mold (12); In the step S2, it is also necessary to apply adhesive on the outer surfaces of the top cover box body mold piece (31) and the outer shell box body mold piece (12); In the step S3, after the outer shell mold (1) is sleeved on the inner cylinder mold (2), the top cover mold (3) is bonded and matched to the outer shell mold (1) along the axial direction of the inner cylinder mold (2); After the top cover mold (3) is bonded and matched with the outer shell mold (1), the top cover box body mold (31) is bonded and matched with the outer shell box body mold (12) to form a junction box blank mold.
3. The method for casting a motor housing with a spiral water channel according to claim 1, characterized in that: The following steps are also included: S4, impregnating the outer shell mold piece (1) and the inner cylinder mold piece (2) with a refractory coating; S5, filling dry sand into the spiral water channel (4) through the process hole (102); The process hole (102) in step S5 is opened on the outer peripheral surface of the shell mold (1), and the process hole (102) is connected to the spiral water channel (4).
4. The method for casting a motor housing with a spiral water channel according to claim 3, characterized in that: In the step S5, when dry sand is filled into the spiral water channel (4) through the process hole (102), the axis of the shell mold (1) is arranged in the horizontal direction.
5. The method for casting a motor housing with a spiral water channel according to claim 3, characterized in that: The following steps are also included: S6, placing the outer shell mold piece (1) and the inner cylinder mold piece (2) into a sand box, burying the outer shell mold piece (1) and the inner cylinder mold piece (2) with dry sand, vibrating and compacting the dry sand in the sand box, and evacuating the sand box; S7, pouring molten metal into the sand box through a pouring pipe; S8, taking out the outer shell mold (1) and the inner cylinder mold (2) from the sand box, removing the casting pipeline, and cleaning the sand residue in the spiral water channel (4) through the process hole (102).
6. The method for casting a motor housing with a spiral water channel according to claim 1, characterized in that: An end of the shell spiral protrusion (11) away from the shell mold piece (1) is provided with a shell glue groove (111), and the extension direction of the shell glue groove (111) is consistent with the extension direction of the shell spiral protrusion (11); An inner cylinder rubber groove (211) is formed at one end of the inner cylinder spiral protrusion (21) away from the inner cylinder mold piece (2), and the extension direction of the inner cylinder rubber groove (211) is consistent with the extension direction of the inner cylinder spiral protrusion (21); The adhesive applied to the spiral protrusion (11) of the outer shell in step S2 is located inside the outer shell adhesive groove (111), and the adhesive applied to the spiral protrusion (21) of the inner cylinder in step S2 is located inside the inner cylinder adhesive groove (211).
7. The method for casting a motor housing with a spiral water channel according to claim 1, characterized in that: In the step S3, before the outer shell mold piece (1) is sleeved on the inner cylinder mold piece (2) along the axial direction of the inner cylinder mold piece (2), a plurality of outer shell fireproof cottons (13) are wound around the inner wall of the outer shell cavity, and a plurality of inner cylinder fireproof cottons (23) are wound around the outer peripheral surface of the inner cylinder mold piece (2); The winding directions of the plurality of outer shell fireproof cottons (13) are consistent with the extension direction of the outer shell spiral protrusion (11), the winding directions of the plurality of inner cylinder fireproof cottons (23) are consistent with the extension direction of the inner cylinder spiral protrusion (21), and the plurality of outer shell fireproof cottons (13) and the plurality of inner cylinder fireproof cottons (23) are all located in the spiral water channel (4); The tolerable temperatures of the plurality of outer shell fireproof cottons (13) and the plurality of inner tube fireproof cottons (23) are both greater than the casting temperature.
8. The method for casting a motor housing with a spiral water channel according to claim 7, characterized in that: Some of the shell fireproof cotton (13) are distributed in layers, and the thickness of some of the shell fireproof cotton (13) is less than 3 mm; The plurality of inner tube fireproof cottons (23) are distributed in layers, and the thickness of the plurality of inner tube fireproof cottons (23) is less than 3 mm.
9. The method for casting a motor housing with a spiral water channel according to claim 8, characterized in that: In the S3 step, before winding a plurality of outer shell fireproof cottons (13) around the inner wall of the outer shell cavity or winding a plurality of inner cylinder fireproof cottons (23) around the outer circumference of the inner cylinder mold piece (2), a plurality of outer shell fireproof cottons (13) away from the inner wall of the outer shell cavity or an inner cylinder fireproof cotton (23) away from the outer circumference of the inner cylinder mold piece (2) are impregnated with a refractory coating.
10. The method for casting a motor housing with a spiral water channel according to claim 9, characterized in that: The following steps are also included: S4, placing the outer shell mold piece (1) and the inner cylinder mold piece (2) into a sand box, burying the outer shell mold piece (1) and the inner cylinder mold piece (2) with dry sand, and vibrating the dry sand in the sand box to make it dense; S5, pouring molten metal into the sand box through a pouring pipe; S6. Take out the outer shell mold (1) and the inner tube mold (2) from the sand box, remove the casting pipeline, and take out a plurality of outer shell fireproof cottons (13) and a plurality of inner tube fireproof cottons (23) from the spiral water channel (4) through the process hole (102).