CN113245513A - Motor jacket casting mold and design method and use method thereof - Google Patents
Motor jacket casting mold and design method and use method thereof Download PDFInfo
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- CN113245513A CN113245513A CN202110755580.5A CN202110755580A CN113245513A CN 113245513 A CN113245513 A CN 113245513A CN 202110755580 A CN202110755580 A CN 202110755580A CN 113245513 A CN113245513 A CN 113245513A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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Abstract
The application discloses motor cover casting mould, which comprises a die body, the mould body has the die cavity of shaping motor overcoat, detachable is provided with the loose piece in the die cavity, be equipped with the data plate face on the motor overcoat, the loose piece is towards the data plate face, the loose piece is suitable for shaping data plate face, detachable sets's loose piece can stretch into the die cavity rapidly and carry out the radiating operation effectively to the data plate face of die cavity motor overcoat, make can not gather the heat quantity on the data plate face, also can be when scribbling the material operation on the data plate face, can remove the loose piece from the die cavity, be convenient for scribble the material operation on the data plate face, the gaseous accessible air discharge duct and the exhaust passage of pouring in-process production simultaneously discharge, avoid appearing subcutaneous gas pocket on the data plate face effectively, the defect of pinhole, improve the quality and the qualification rate of producing the motor overcoat.
Description
Technical Field
The application relates to the technical field of gravity casting, in particular to a motor jacket casting mold and a design method and a use method thereof.
Background
And during gravity casting, the molten metal is poured into the casting mold under the action of the earth gravity, and the molten metal is also poured by weighing force. Gravity casting includes sand casting, metal casting, investment casting, lost foam casting, and the like. If the nameplate face designed according to the traditional casting process in the prior art is cooled by cooling water generally, but the nameplate face is always in a pit in a die and has patterns on the surface, so that the cooling water cannot fully and thoroughly cool the nameplate face, meanwhile, due to the pattern structure, the coating process is more complicated, the uniform coating cannot be accurately coated on each part of the nameplate face, meanwhile, the pattern structure also easily causes the exhaust process to be unsmooth, and heat is easily collected on the surface of the nameplate face.
Disclosure of Invention
In order to overcome prior art's not enough, an aim at of this application provides a motor overcoat casting mould, and it can carry out heat dissipation cooling and exhaust effectively to the data plate face through the loose piece of separable setting for the radiating rate of data plate face is fast in whole production process, the exhaust is smooth and easy, and the motor overcoat of producing does not have the defect of subcutaneous gas pocket, pinhole.
Another aim at of this application provides a motor overcoat casting mould, and it sets up separable loose piece, is convenient for take it out from the die cavity to be convenient for scribble the material operation on the data plate face, make coating can coat on the data plate face uniformly, improve the efficiency of coating.
Another object of the present application is to provide a method for designing a motor housing casting mold, which can rapidly design various parameters of a nameplate surface, and can screen out various optimal parameters of a contact portion according to the parameters of the nameplate surface, so that the quality and quality of a motor housing produced under the parameters can be greatly improved.
Another objective of this application is to provide a method for using of casting mould, accessible a plurality of loose pieces are according to the order to dispel the heat and the exhaust operation to the data plate face in a plurality of mould bodies one by one, can improve the radiating efficiency of loose piece to the data plate face, improve the qualification rate of producing the motor overcoat effectively.
In order to achieve the above purposes, the technical scheme adopted by the application is as follows: the utility model provides a motor overcoat casting mould, includes the mould body, the mould body has the die cavity of shaping motor overcoat, detachable is provided with the loose piece in the die cavity, be equipped with the data plate face on the motor overcoat, the loose piece is towards the data plate face, the loose piece is suitable for the shaping the data plate face.
Further, the loose piece includes structure piece and shaping piece, structure piece detachably connect in the shaping piece, be equipped with the exhaust passage on the structure piece, be equipped with the air discharge duct on the shaping piece, the air discharge duct intercommunication the exhaust passage.
Furthermore, the molding block comprises a connecting portion and a contact portion, the contact portion is fixedly connected to the lower portion of the connecting portion, the connecting portion is in threaded connection with the structure block, and the contact portion is aligned to the nameplate surface.
Further, the exhaust groove includes first exhaust groove and second exhaust groove, first exhaust groove set up in the top of second exhaust groove, the one end intercommunication in first exhaust groove the exhaust passage, the other end intercommunication in exhaust groove the second exhaust groove.
Further, the first exhaust grooves are transversely arranged on the contact portion, the second exhaust grooves are vertically arranged on the contact portion, the number of the second exhaust grooves is multiple, the second exhaust grooves are arranged on the contact portion at intervals, and the second exhaust grooves are communicated with the first exhaust grooves respectively.
Furthermore, the contact part is provided with transverse and longitudinal staggered mesh grooves, and the depth of each mesh groove is smaller than that of the exhaust groove.
A design method of a motor jacket casting mold comprises the following steps:
s1, applying simulation software to analyze and find out the convex part of the nameplate surface, enabling the convex part to be equivalent to a cuboid structure, and determining the height of the convex part to be H1Width of W1Thickness of delta1；
S2, calculating the volume V of the bulge1=H1×W1×δ1(ii) a Calculating the mass M of the projection1=ρ1×V1=ρ1×H1×W1×δ1Where ρ is1The density of the nameplate surface;
s3, determining the temperature T of the nameplate surface during pouring1And temperature T at the time of opening the mold2Calculating the energy Q stored in the projection1，Q1=C1×M1×Δt1= C1×ρ1×H1×W1×δ1×(T1-T2) In which C is1Specific heat capacity, Δ t, of the casting liquid at the die opening temperature1Is T1And T2The temperature difference therebetween;
s4, designing a contact part aligned with the nameplate surface on the forming block into a cuboid structure, and determining the height of the contact part as H1Width of W1Thickness of delta2；
S5, calculating the volume V of the contact part2=H1×W1×δ2Calculating the mass M of the contact portion2，M2=ρ2×V2=ρ2×H1×W1×δ2Where ρ is2Is the density of the shaped block;
s6, determining the quantity of heat required to be absorbed by the contact part as Q2Determining an initial temperature of the contact portion as T3(ii) a Calculating Q2=C2×M2×Δt2= C2×ρ2×H1×W1×δ2×（T2-T3) Wherein, C2Is the specific heat capacity, delta t, of the nameplate surface at the die opening temperature2Is T2And T3The temperature difference therebetween;
s7, according to Q2≥Q1I.e. C2×ρ2×H1×W1×δ2×（T2-T3）≥C1×ρ1×H1×W1×δ1×(T1-T2) Is obtained by
；
S8, take δ2Minimum value of (2)
And determining the size of the contact part, designing the shape and the size of the forming block according to the size of the contact part, and further redesigning the shape and the size of the die body.
Further, in the step S8, δ is correctedminCorrection is performed to obtain a correction value deltacor=aδminA is more than or equal to 1.4 and less than or equal to 2, and a is a correction coefficient.
Further, C1=921J/kg▪℃，ρ1=2630kg/m3，T1=690℃，T2=400℃，C2=560J/kg▪℃，ρ1=7850kg/m3，T3=80 ℃ available
Substituting the data to result in one digit after the decimal point to obtain deltamin=0.5δ1Taking a =1.6, get δcor=aδmin=0.5aδ1=0.8δ1。
A use method of a motor jacket casting mold comprises the following steps:
s100, preparing a casting loose piece and a cooling loose piece for each mould body, placing the casting loose piece into the cavity, and casting;
s200, after casting is finished, taking the casting movable block out of the mold body, and then placing the cooling movable block in the mold body to enable the cooling movable block to absorb heat generated by a nameplate surface;
further, in the step S200, a plurality of cooling blocks are provided, so that the plurality of cooling blocks can respectively perform a heat dissipation operation on the plurality of mold bodies;
the specific operation is as follows: after the previous cooling loose piece cools the previous mold body, the casting loose piece in the next mold body is taken out, and the next cooling loose piece is inserted into the next mold body after the casting loose piece is taken out, so that the next cooling loose piece can absorb heat generated by the nameplate surface in the next mold body. Repeating the steps until the last cooling loose piece is inserted into the corresponding mould body and absorbs the heat generated by the nameplate surface in the mould body, then drawing out the casting loose piece in the next mould body, and inserting the first cooling loose piece into the next mould body after drawing out so that the first cooling loose piece absorbs the heat generated by the nameplate surface in the mould body, thereby carrying out a new round of heat absorption cooling operation on the plurality of cooling loose pieces.
Further, the number of the cooling loose pieces is 5.
Further, a plurality of the cooling live blocks are numbered in sequence and are alternately and circularly used.
Compared with the prior art, the beneficial effect of this application lies in:
(1) be equipped with casting mould and loose piece, the loose piece detachable liftoff sets up in the die cavity, can dispel the heat effectively and exhaust to the data plate face, improves the radiating efficiency of whole data plate face, guarantees simultaneously that the exhaust is smooth and easy in the motor overcoat production process, avoids appearing defects such as subcutaneous gas pocket, pinhole to improve the quality of producing the motor overcoat, also improve the qualification rate of producing the motor overcoat.
(2) Set up separable loose piece, can be when carrying out the operation of scribbling the coating, can take out the loose piece from the die cavity, be convenient for scribble the coating operation to the motor overcoat, simplify the coating process, improve the efficiency of scribbling.
(3) The design method of the motor jacket casting mold is provided, various parameters of the nameplate surface can be rapidly determined, so that the optimal parameters of the contact part in the forming block can be found out through experimental verification, the nameplate surface produced under the parameters has no defects of subcutaneous air holes and needle holes, and the quality and the qualification rate of the produced motor jacket are greatly improved.
(4) The utility model provides a motor overcoat casting mould's application method, a plurality of cooling loose pieces of accessible are in order dispel the heat in to a plurality of mould bodies in the workshop, a plurality of cooling loose pieces are in order numbered, can realize fast through the serial number that sets up after this internal heat absorption of last cooling loose piece to last mould is accomplished, next cooling loose piece can be fast to this internal data plate face of next mould heat absorption, can improve the production efficiency in the whole production process, last cooling loose piece also can cool off after using simultaneously, prepare for next circulation use.
Drawings
Fig. 1 is a perspective view of a casting mold in the present application.
Fig. 2 is an exploded view of the loose piece of the present application away from the casting mold.
Fig. 3 is a schematic view of the contact portion facing the nameplate surface in the present application.
Fig. 4 is a schematic view of the present application with the structural and forming blocks separated.
FIG. 5 is a front view of a loose piece of the present application.
Fig. 6 is a cross-sectional view taken along a-a of fig. 5 in the present application.
Fig. 7 is an enlarged schematic view of the present application at B in fig. 6.
FIG. 8 is a schematic view of a plurality of loose pieces aligned with a plurality of mold bodies.
FIG. 9 is a schematic view of a single loose piece aligned with a single mold body.
In the figure: 1. casting a mold; 10. a mold body; 20. a cavity; 30. a loose block; 31. a structural block; 311. an exhaust passage; 32. forming a block; 321. a connecting portion; 322. a contact portion; 33. an exhaust groove; 331. a first exhaust groove; 332. a second exhaust groove; 34. a mesh groove; 35. casting a loose piece; 36. cooling the loose piece; 40. a motor housing; 41. a nameplate surface.
Detailed Description
The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus, and for clarity of presentation of various features of this application, such that the overall structure of a casting mold is not expressly shown in the figures of this application, and is not intended to limit the casting mold to the figures in this application, and other casting molds having the requisite components within the scope of this application.
As shown in fig. 1-9, a motor jacket casting mold 1 includes a mold body 10, the mold body 10 has a cavity 20 for forming a motor jacket 40, a loose piece 30 is detachably disposed in the cavity 20, a nameplate surface 41 is disposed on the motor jacket 40, the loose piece 30 faces the nameplate surface 41, the loose piece 30 is suitable for forming the nameplate surface 41, wherein a machining allowance of 3mm is disposed on the nameplate surface 41, the machining allowance of 3mm can not only ensure that various errors and surface defects of a previous process can be effectively eliminated, but also can not cause waste of production materials. The loose piece 30 of separable setting can stretch into the die cavity 20 rapidly and carry out the operation of dispelling the heat effectively to the data plate face 41 of motor overcoat 40 in the die cavity 20, make can not gather the heat on the data plate face 41, also can carry out the coating operation on the data plate face 41, can shift out the loose piece 30 from the die cavity 20, be convenient for carry out the coating operation on the data plate face 41, the gaseous accessible air discharge duct 33 and the exhaust passage 311 of pouring in-process production simultaneously discharge, avoid appearing subcutaneous gas pocket on the data plate face 41 effectively, the defect of pinhole, the quality and the qualification rate of the motor overcoat 40 that the improvement was produced.
As shown in fig. 2 to 4, the loose piece 30 includes a structure piece 31 and a forming piece 32, the structure piece 31 is detachably connected to the forming piece 32, preferably, the forming piece 32 can be fixed on the structure piece 31 by bolts, and the connection is simple and firm and the installation is convenient by the bolt fixing mode; be equipped with exhaust passage 311 on the structure piece 31, be equipped with exhaust groove 33 on the shaping piece 32, exhaust groove 33 communicates exhaust passage 311, gas can get into exhaust passage 311 through exhaust groove 33, discharge from exhaust passage 311 afterwards, can exhaust to data plate face 41 fast effectively, whole exhaust process is quick effective, avoid gas gathering in data plate face 41 department and lead to data plate face 41 easily to appear the defect of subcutaneous hole, pinhole, improve the qualification rate of the motor overcoat 40 that produces.
As shown in fig. 3 and 4, the molding block 32 includes a connecting portion 321 and a contact portion 322, the contact portion 322 is fixedly connected below the connecting portion 321, the connecting portion 321 is connected to the structure block 31 by a screw, the connecting portion 321 can fix the molding block 32 on the structure block 31, the contact portion 322 is aligned with the nameplate surface 41, and the contact portion 322 can perform a heat dissipation operation on the nameplate surface 41.
As shown in fig. 5 to 7, the exhaust groove 33 includes a first exhaust groove 331 and a second exhaust groove 332, the first exhaust groove 331 is disposed above the second exhaust groove 332, one end of the first exhaust groove 331 is communicated with the exhaust passage 311, the other end of the exhaust groove 33 is communicated with the second exhaust groove 332, and the gas can sequentially pass through the second exhaust groove 332 and the first exhaust groove 331 to enter the exhaust passage 311 and then be exhausted through the exhaust passage 311, so as to improve the exhaust speed of the internal gas and improve the smoothness of the exhaust process, thereby accelerating the circulation of the air, improving the heat dissipation efficiency, and effectively solving the problem in the prior art that subcutaneous air holes and needle holes are likely to appear on the surface of the nameplate surface 41 due to insufficient exhaust. The first exhaust groove 331 is transversely disposed at the contact portion 322, and a plurality of second exhaust grooves 332 are transversely disposed so as to be connected therebelow, such that the gas in the plurality of second exhaust grooves 332 is exhausted through the first exhaust groove 331 and the exhaust passage 311; the second exhaust grooves 332 are vertically arranged on the contact portion 322, the second exhaust grooves 332 are vertically arranged so that gas enters the first exhaust grooves 331 along the second exhaust grooves 332, the number of the second exhaust grooves 332 is multiple, the second exhaust grooves 332 are arranged on the contact portion 322 at intervals, the exhaust speed of the contact portion 322 is accelerated by the second exhaust grooves 332, the exhaust efficiency of the contact portion 322 is improved, each second exhaust groove 332 is communicated with the first exhaust grooves 331 respectively, the gas in each second exhaust groove 332 can be discharged through the first exhaust grooves 331 to form the exhaust passages 311, and then the gas is discharged through the exhaust passages 311, so that the whole exhaust process is rapid and convenient, and the exhaust effect is good.
As shown in fig. 7, the contact portion 322 is provided with transversely and longitudinally staggered mesh grooves 34, and the depth of the mesh grooves 34 is smaller than that of the exhaust grooves 33. Specifically, the depth of the mesh grooves 34 is 1mm, and the depth of the exhaust grooves 33 is 2mm, so that the gas can be effectively exhausted through the mesh grooves 34 while the heat absorption effect of the entire contact portion 322 is ensured.
The depths of the first exhaust groove 331 and the second exhaust groove 332 are both 2mm, and the widths thereof are both 4mm, so that the heat absorption efficiency of the whole contact part 322 can be improved to the maximum extent while the smoothness of the exhaust from the first exhaust groove 331 and the second exhaust groove 332 is ensured, and the contact part 322 has excellent exhaust performance and excellent heat absorption and cooling performance.
As shown in fig. 8-9, in the use method of the casting mold 1, each mold body 10 is provided with a loose piece 30, each loose piece 30 includes a casting loose piece 35 and a cooling loose piece 36, and when the mold body 10 is cast, the casting loose piece 35 can be placed in the cavity 20, so that the mold body 10 can cast the casting loose piece 35 conveniently; after the casting is completed, the casting loose piece 35 is taken out of the mold body 10, and then the cooling loose piece 36 is inserted into the cavity 20 of the mold body 10, so that the cooling loose piece 36 can absorb heat generated by the nameplate surface 41, the motor jacket 40 in the mold body 10 can be cast and produced by arranging the casting loose piece 35 and the cooling loose piece 36, meanwhile, the heat generated by the nameplate surface 41 can also be absorbed, and the purpose of cooling the nameplate surface 41 is achieved.
As shown in fig. 8 to 9, in the use method of the casting mold 1, the number of the cooling loose pieces 36 is 5, the 5 cooling loose pieces are sequentially arranged from left to right, and the arrangement of the 5 cooling loose pieces 36 can not only effectively improve the efficiency of cooling the nameplate surfaces 41 in the plurality of mold bodies 10 in the production process, but also enable the produced motor outer sleeve 40 to have no defects of subcutaneous air holes and needle holes. The number of the 5 cooling movable blocks 36 can be numbered in sequence in the production process, the number of the 5 cooling movable blocks 36 is 1, 2, 3, 4 and 5 in sequence, when the first die body 10 is cast, the casting movable block 35 is placed in the cavity 20 and cast, after the first die body 10 is cast, the casting movable block 35 in the first die body 10 can be taken out, the number 1 cooling movable block 36 is inserted into the first die body 10, so that the number 1 cooling movable block 36 can absorb the heat generated by the nameplate surface 41 in the first die body 10, after the absorption is finished, the number 1 cooling movable block 36 is taken out from the first die body 10, namely, the production and cooling operation of the motor jacket 40 in the first die body 10 are finished, after the first die body 10 finishes the production and cooling of the motor jacket 40, the second mold body 10 can be moved to the position below the cooling loose piece number 2 36, at this time, the casting loose piece 35 in the second mold body 10 is pulled out, the cooling loose piece number 2 36 is inserted into the second mold body 10, so that the cooling loose piece number 2 36 can cool the nameplate surface 41 produced in the second mold body 10, after the cooling loose piece number 2 36 is cooled, the cooling loose piece number 2 is pulled out from the second mold body 10, the above operations are circulated, so that the cooling loose piece number 3 can cool the nameplate surface 41 in the third mold body 10, the cooling loose piece number 4 can cool the nameplate surface 41 in the fourth mold body 10, the cooling loose piece number 5 can cool the nameplate surface 41 in the fifth mold body 10, and after the cooling of the fifth mold body 10 is completed, the temperature of the cooling loose piece number 1 is reduced to the initial temperature when the nameplate surface 41 in the first mold body 10 is not cooled When the sixth mold body 10 is cooled, the casting loose piece 35 in the sixth mold body 10 can be taken out from the mold body 10, and then the cooling loose piece 36 No. 1 is inserted into the sixth mold body 10, so that the cooling loose piece 36 No. 1 can cool the nameplate surface 41 in the sixth mold body 10, and therefore 5 cooling loose pieces 36 can be alternately and circularly used, and the purpose of selecting 5 cooling loose pieces 36 is to effectively avoid cooling the nameplate surface 41 in the second mold body 10 after one cooling loose piece 36 is cooled down after the first mold body 10 is cooled down, which needs a long time to cool down, and therefore, the cooling efficiency in the whole production process can be greatly reduced. Therefore, 5 cooling loose pieces 36 are selected, so that after the No. 1 cooling loose piece 36 is cooled, the No. 2 cooling loose piece 36 can carry out cooling operation on the second die body 10, after the No. 2 cooling loose piece 36 is cooled, the No. 3 cooling loose piece 36 is cooled again, the circulation is repeated in a similar way until the No. 5 cooling loose piece 36 is cooled completely, the No. 2 cooling loose piece 36 starts to be cooled until the No. 5 cooling loose piece 36 is cooled completely, in the time period, the No. 1 cooling loose piece 36 is cooled by itself, so that the No. 1 cooling loose piece 36 can have enough time to carry out self-cooling after the cooling is finished, prepare for the next cooling, ensure the cooling effect when carrying out the next cooling, and the normal cooling operation of the next mold body 10 in the production process is not affected by the process, so that the cooling efficiency in the whole production process is greatly improved.
A design method of a motor jacket casting mold comprises the following steps:
s1, applying simulation software to analyze and find out the convex part of the nameplate surface, and enabling the convex part to be equivalent to a cuboid structure and ensuring thatHeight of the fixed protrusion is H1Width of W1Thickness of delta1；
S2, calculating the volume V of the bulge1=H1×W1×δ1(ii) a Calculating mass M of the projection1=ρ1×V1=ρ1×H1×W1×δ1Where ρ is1The density of the nameplate surface;
s3, determining the temperature T of the nameplate surface during pouring1And temperature T at the time of opening the mold2Calculating the energy Q stored in the projection1，Q1=C1×M1×Δt1= C1×ρ1×H1×W1×δ1×(T1-T2) In which C is1Specific heat capacity, Δ t, of the casting liquid at the die opening temperature1Is T1And T2The temperature difference therebetween;
s4, designing the contact part of the forming block aligned with the nameplate surface into a cuboid structure, and determining the height of the contact part as H1Width of W1Thickness of delta2；
S5, calculating the volume V of the contact part2=H1×W1×δ2Calculating the mass M of the contact portion2，M2=ρ2×V2=ρ2×H1×W1×δ2Where ρ is2The density of the molded block;
s6, determining the quantity of heat required to be absorbed by the contact part as Q2Determining the initial temperature of the contact portion as T3(ii) a Calculating Q2=C2×M2×Δt2= C2×ρ2×H1×W1×δ2×（T2-T3) Wherein, C2Is the specific heat capacity, delta t, of the nameplate surface at the die opening temperature2Is T2And T3The temperature difference therebetween;
s7, according to Q2≥Q1I.e. C2×ρ2×H1×W1×δ2×（T2-T3）≥C1×ρ1×H1×W1×δ1×(T1-T2) Is obtained by
；
S8, take δ2Minimum value of (2)
And determining the size of the contact part, designing the shape and the size of the forming block according to the size of the contact part, and further redesigning the shape and the size of the die body.
Further, in step S8, δ is correctedminCorrection is performed to obtain a correction value deltacor=aδminA is more than or equal to 1.4 and less than or equal to 2, and a is a correction coefficient.
Further, C1=921J/kg▪℃，ρ1=2630kg/m3，T1=690℃，T2=400℃，C2=560J/kg▪℃，ρ1=7850kg/m3，T3=80 ℃ available
Substituting the data to result in one digit after the decimal point to obtain deltamin=0.5δ1Taking a =1.6, get δcor=aδmin=0.5aδ1=0.8δ1。
Wherein the correction value is set because of the initial temperature T of the loose piece in the production process3There may occur a case that more than 80 c is generated or the conversion rate of heat transfer is not 100% during the heat transfer, and in order to compensate for the heat loss that may be caused in the above two aspects, δ may be increased during the actual production process2The value of (2) enables the loose piece to effectively and thoroughly absorb the heat generated by the nameplate surface, thereby improving the heat dissipation effect of the loose piece.
A use method of a motor jacket casting mold comprises the following steps:
s100, preparing a casting loose piece and a cooling loose piece for each die body, placing the casting loose piece in a cavity, and casting;
s200, after casting is finished, taking the casting loose piece out of the mold body, and then placing the cooling loose piece in the mold body to enable the cooling loose piece to absorb heat generated by the nameplate surface;
in step S200, a plurality of cooling blocks may be disposed, so that the plurality of cooling blocks can perform heat dissipation operations on the plurality of mold bodies respectively. The specific operation is as follows: after the last cooling loose piece is cooled and finished for the last mould body, the casting loose piece in the next mould body can be taken out, and the next cooling loose piece is inserted into the next mould body after being taken out, so that the heat generated by the nameplate surface in the next mould body can be absorbed by the next cooling loose piece. Repeating the steps until the last cooling loose piece is inserted into the corresponding mould body, and after the heat generated by the nameplate surface in the mould body is absorbed by the last cooling loose piece, drawing out the casting loose piece in the next mould body, and after the casting loose piece is drawn out, inserting the first cooling loose piece into the next mould body to enable the first cooling loose piece to absorb the heat generated by the nameplate surface in the mould body, so that a plurality of cooling loose pieces can be subjected to a new round of heat absorption cooling operation.
Wherein, the number of the cooling loose pieces is 5.
Wherein, a plurality of cooling loose pieces are numbered in sequence and are alternately and circularly used.
The specific cooling operation of the 5 cooling blocks is as follows: numbering 5 cooling loose pieces in sequence, wherein the numbering of the 5 cooling loose pieces is No. 1, No. 2, No. 3, No. 4 and No. 5 in sequence, when a first mould body is cast, the casting loose pieces are placed in a cavity and cast, after the first mould body is cast, the casting loose pieces in the first mould body can be taken out, then the No. 1 cooling loose pieces are inserted into the first mould body, so that the No. 1 cooling loose pieces can absorb heat generated by a nameplate surface in the first mould body, after the absorption is finished, the No. 1 cooling loose pieces are taken out from the first mould body, namely, the production and cooling operation of a motor jacket in the first mould body are finished, after the first mould body finishes the production and cooling of the motor jacket, a second mould body can be moved to the position below the No. 2 cooling loose pieces, at the moment, the casting loose pieces in the second mould body are taken out, inserting the No. 2 cooling loose piece into the second mould body, so that the No. 2 cooling loose piece can cool the nameplate surface produced in the second mould body, after the No. 2 cooling loose piece completes the cooling operation, drawing the No. 2 cooling loose piece out of the second mould body, circulating the operations, so that the No. 3 cooling loose piece can cool the nameplate surface in the third mould body, the No. 4 cooling loose piece can cool the nameplate surface in the fourth mould body, the No. 5 cooling loose piece can cool the nameplate surface in the fifth mould body, after the fifth mould body completes the cooling, the temperature of the No. 1 cooling loose piece is reduced to the initial temperature when the nameplate surface in the first mould body is not cooled, when the sixth mould body is cooled, the casting loose piece in the sixth mould body can be taken out of the mould body firstly, insert the sixth mould with No. 1 cooling loose piece afterwards originally internally for No. 1 cooling loose piece can cool off this internal data plate face of sixth mould, can realize 5 cooling loose pieces circulation in turn from this and use, choose for use the aim at of 5 cooling loose pieces to avoid adopting a cooling loose piece effectively after cooling off first mould body, it needs very long time to cool down the back and just can carry out cooling operation to this internal data plate face of second mould, cooling efficiency in the whole production process that from this can greatly reduced. Therefore, 5 cooling loose pieces are selected for use, the cooling of the No. 1 cooling loose piece is completed, the No. 2 cooling loose piece 36 can be used for cooling the second die body 10, the cooling of the No. 2 cooling loose piece 36 is completed, the No. 3 cooling loose piece 36 is cooled again, the circulation is analogized in sequence until the cooling of the No. 5 cooling loose piece 36 is completed, the No. 2 cooling loose piece 36 starts to be cooled until the No. 5 cooling loose piece 36 is cooled in the time period, the No. 1 cooling loose piece can be cooled per se at the moment, the No. 1 cooling loose piece can be cooled per se within enough time after the cooling is completed, the preparation is made for the next cooling, the cooling effect of the next cooling is guaranteed, the normal cooling operation of the next die body in the production process can not be influenced, and the cooling efficiency in the whole production process is greatly improved.
Example 1
A design method of a motor jacket casting mold comprises the following steps:
(1) UG-3D software is used for analyzing and finding out the convex part of the nameplate surface, the convex part is equivalent to a cuboid structure, and the height H of the convex part is determined1151.3mm, width W1140.6mm and a thickness delta1Is 15 mm;
(2) calculating the volume V of the projection1=H1×W1×δ1=151.3×140.6×15=319091.7mm3(ii) a Calculating mass M of the projection1=ρ1×V1=ρ1×H1×W1×δ1Where ρ is1Density of the nameplate surface, p1=2630kg/m3Substituting the above data to obtain M1=0.839kg；
(3) Determining the temperature T of the cast nameplate1690 ℃ and the temperature T at the time of opening the die2The energy Q stored in the bulge was calculated at 400 deg.C1，Q1=C1×M1×Δt1= C1×ρ1×H1×W1×δ1×(T1-T2) In which C is1The specific heat capacity of the casting liquid at the die opening temperature is C1=921J/kg▪℃，Δt1Is T1And T2The above values are substituted to obtain Q1=921×0.839×(690-400)=224088.5J；
(4) Designing the contact part of the forming block aligned with the nameplate surface into a cuboid structure, and determining the height H of the contact part1151.3mm, width W1140.6mm and a thickness delta2；
(5) Calculating the volume V of the contact2=H1×W1×δ2Calculating the mass M of the contact portion2，M2=ρ2×V2=ρ2×H1×W1×δ2Where ρ is2Is the density of the molded block, and has a value of p2=7850kg/m3，
(6) Determining the amount of heat to be absorbed by the contact as Q2Determining the initial temperature T of the contact3Is 80 ℃; calculating Q2=C2×M2×Δt2= C2×ρ2×H1×W1×δ2×（T2-T3) Wherein, C2The specific heat capacity of the nameplate surface at the mold opening temperature is C2=560 J/kg▪℃，Δt2Is T2And T3The temperature difference therebetween;
(7) according to Q2≥Q1I.e. C2×ρ2×H1×W1×δ2×（T2-T3）≥C1×ρ1×H1×W1×δ1×(T1-T2) Is obtained by
Substituting into data C1=921J/kg▪℃，ρ1=2630kg/m3，T1=690℃，T2=400℃，C2=560J/kg▪℃，ρ1=7850kg/m3，T3Keeping one digit after decimal point at 80 deg.C to obtain delta2≥0.5δ1；
(8) Taking into account the initial temperature T of the loose piece during production3There may be a case where more than 80 c is present or the conversion rate of heat transfer during heat transfer is not 100%, and in order to compensate for the heat loss that may be caused in both of the above two aspects, δ may be increased during actual production2Of such that δ2=0.8×δ1=0.8 × 15=12mm by increasing δ2The heat loss is compensated by the value of (A), so that the loose piece can completely absorb the heat generated by the nameplate surface, and the heat absorption effect of the loose piece is ensured.
(9) When delta2When =12mm, the actual T is calculated at this time3Not less than 200.3 ℃ and the actual T in this case3The temperature value is more than 80 ℃, and the initial temperature T of the loose piece in the production process can be met3At a temperature of more than 80 ℃ so thatThe loose piece at this moment can also effectively absorb the heat generated by the nameplate surface, and the absorption efficiency of the loose piece is ensured.
Example 2
A design method of a motor jacket casting mold is the same as that of embodiment 1, except that the thickness of the projection in the step (4) is δ1The thickness of the contact part is delta2And δ2=0.5δ1。
Example 3
A design method of a motor jacket casting mold is the same as that of embodiment 1, except that the thickness of the projection in the step (4) is δ1The thickness of the contact part is delta2And δ2=0.6δ1。
Example 4
A design method of a motor jacket casting mold is the same as that of embodiment 1, except that the thickness of the projection in the step (4) is δ1The thickness of the contact part is delta2And δ2=0.7δ1。
Example 5
A design method of a motor jacket casting mold is the same as that of embodiment 1, except that the thickness of the projection in the step (4) is δ1The thickness of the contact part is delta2And δ2=0.9δ1。
Example 6
A design method of a motor jacket casting mold is the same as that of embodiment 1, except that the thickness of the projection in the step (4) is δ1The thickness of the contact part is delta2And δ2=δ1。
Example 7
A design method of a motor jacket casting mold is the same as that of embodiment 1, except that the thickness of the projection in the step (4) is δ1The thickness of the contact part is delta2And δ2=1.1δ1。
The performance of the motor casings cast in examples 1 to 7 is shown in table 1, 100 pieces of the motor casings are cast in each group, the number of subcutaneous air holes of each motor casing is calculated, and the average number of subcutaneous air holes of each group and the qualification rate of the produced motor casings are calculated.
The qualified standard of the motor outer sleeve is that the number of subcutaneous air holes on the surface of the motor outer sleeve is less than or equal to 1, namely the motor outer sleeve is qualified, and the qualified rate of the motor outer sleeve is the qualified number of the motor outer sleeve/the total number of the motor outer sleeve.
TABLE 1 Performance of Motor casings cast in examples 1-7
As can be seen from the data in Table 1: (1) when delta2If the thickness is more than 12mm, a is more than 1.6, the produced motor jacket basically has no shrinkage cavity and high qualification rate, but the qualification rate of the produced motor jacket is not obviously increased along with the further increase of the value a, but the thickness of the contact part is thicker, so that production materials are wasted; (2) when delta2If the thickness is less than 12mm, a can be calculated to be less than 1.6, and the number of subcutaneous air holes of the produced motor outer sleeve is large, so that the yield of the produced motor outer sleeve is low; (3) when delta2=12mm, a =1.6 can be calculated, the surface of the produced motor jacket has no shrinkage cavity basically, the yield is high, and the thickness of the contact part is moderate, so that the motor jacket has a good heat absorption effect and does not waste production raw materials due to the fact that the thickness of the contact part is too thick, and therefore the thickness of the contact part in the embodiment 1 is the optimal size of the thickness of the contact part in the application.
The design formula of the thickness of the loose piece can be delta from the test2=0.8δ1The loose piece under this thickness can be when absorbing the heat that the data plate face produced fast effectively, and it does not have the defect of subcutaneous gas pocket, pinhole of the motor overcoat of producing yet to improve the qualification rate of the motor overcoat of producing greatly, thereby reduce the disability rate in the production process, improve production efficiency.
The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.
Claims (10)
1. The utility model provides a motor overcoat casting mould, includes the mould body, the mould body has the die cavity of shaping motor overcoat, its characterized in that: the motor is characterized in that a movable block is detachably arranged in the cavity, a nameplate surface is arranged on the motor outer sleeve, the movable block faces the nameplate surface, the movable block is suitable for forming the nameplate surface, the movable block comprises a structure block and a forming block, the structure block is detachably connected with the forming block, an exhaust channel is arranged on the structure block, an exhaust groove is arranged on the forming block, and the exhaust groove is communicated with the exhaust channel.
2. The motor housing casting mold of claim 1, wherein: the molding block comprises a connecting portion and a contact portion, the contact portion is fixedly connected to the lower portion of the connecting portion, the contact portion is in threaded connection with the structure block, and the contact portion is aligned to the nameplate surface.
3. The motor housing casting mold of claim 2, wherein: the air discharge duct includes first air discharge duct and second air discharge duct, first air discharge duct set up in the top of second air discharge duct, the one end intercommunication of first air discharge duct the exhaust passage, the other end intercommunication of air discharge duct the second air discharge duct, first air discharge duct transversely set up in the contact site, the second air discharge duct vertically set up in the contact site, the quantity of second air discharge duct is a plurality of, and is a plurality of the second air discharge duct interval set up in the contact site, each the second air discharge duct communicates respectively the first air discharge duct.
4. The motor housing casting mold of claim 3, wherein: and the forming block is provided with transverse and longitudinal staggered mesh grooves, and the depth of each mesh groove is smaller than that of the exhaust groove.
5. A design method of a motor jacket casting mold is characterized by comprising the following steps:
s1, applying simulation software to analyze and find out the convex part of the nameplate surface, enabling the convex part to be equivalent to a cuboid structure, and determining the height of the convex part to be H1Width of W1Thickness of delta1；
S2, calculating the volume V of the bulge1=H1×W1×δ1(ii) a Calculating the mass M of the projection1=ρ1×V1=ρ1×H1×W1×δ1Where ρ is1The density of the nameplate surface;
s3, determining the temperature T of the nameplate surface during pouring1And temperature T at the time of opening the mold2Calculating the energy Q stored in the projection1，Q1=C1×M1×Δt1= C1×ρ1×H1×W1×δ1×(T1-T2) In which C is1Specific heat capacity, Δ t, of the casting liquid at the die opening temperature1Is T1And T2The temperature difference therebetween;
s4, designing a contact part aligned with the nameplate surface on the forming block into a cuboid structure, and determining the height of the contact part as H1Width of W1Thickness of delta2；
S5, calculating the volume V of the contact part2=H1×W1×δ2Calculating the mass M of the contact portion2，M2=ρ2×V2=ρ2×H1×W1×δ2Where ρ is2Is the density of the shaped block;
s6, determining the quantity of heat required to be absorbed by the contact part as Q2Determining an initial temperature of the contact portion as T3(ii) a Calculating Q2=C2×M2×Δt2= C2×ρ2×H1×W1×δ2×（T2-T3) Wherein, C2Is the specific heat capacity, delta t, of the nameplate surface at the die opening temperature2Is T2And T3The temperature difference therebetween;
s7, according to Q2≥Q1I.e. C2×ρ2×H1×W1×δ2×（T2-T3）≥C1×ρ1×H1×W1×δ1×(T1-T2) Is obtained by
；
S8, take δ2Minimum value of (2)
And determining the size of the contact part, designing the shape and the size of the forming block according to the size of the contact part, and further redesigning the shape and the size of the die body.
6. The method for designing a motor casing casting mold according to claim 5, wherein: in the step S8, δ is correctedminCorrection is performed to obtain a correction value deltacor=aδminA is more than or equal to 1.4 and less than or equal to 2, and a is a correction coefficient.
7. The method for designing a motor casing casting mold according to claim 6, wherein: c1=921J/kg▪℃，ρ1=2630kg/m3，T1=690℃，T2=400℃，C2=560J/kg▪℃，ρ1=7850kg/m3，T3=80 ℃ available
Substituting the data to result in one digit after the decimal point to obtain deltamin=0.5δ1Taking a =1.6, get δcor=aδmin=0.5aδ1=0.8δ1。
8. The use method of the motor jacket casting mold is characterized by comprising the following steps of:
s100, preparing a casting loose piece and a cooling loose piece for each mould body, placing the casting loose piece into a cavity, and casting;
s200, after casting is finished, the casting movable block is taken out of the die body, and then the cooling movable block is placed in the die body, so that the cooling movable block can absorb heat generated by the nameplate surface.
9. The method for using the motor jacket casting mold according to claim 8, wherein: in the step S200, a plurality of cooling loose pieces may be provided, so that the plurality of cooling loose pieces can perform heat dissipation operations on the plurality of mold bodies respectively;
after the previous cooling loose piece cools the previous mold body, the casting loose piece in the next mold body is drawn out, and the next cooling loose piece is inserted into the next mold body after the casting loose piece is drawn out, so that the next cooling loose piece can absorb heat generated by the nameplate surface in the next mold body;
repeating the steps until the last cooling loose piece is inserted into the corresponding mould body and absorbs the heat generated by the nameplate surface in the mould body, then drawing out the casting loose piece in the next mould body, and inserting the first cooling loose piece into the next mould body after drawing out so that the first cooling loose piece absorbs the heat generated by the nameplate surface in the mould body, thereby carrying out a new round of cooling operation on the cooling loose pieces.
10. The method of using the motor housing casting mold of claim 9, wherein: and a plurality of cooling live blocks are numbered in sequence and are alternately and circularly used.
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| CN211588469U (en) * | 2019-11-18 | 2020-09-29 | 江麓机电集团有限公司 | Reticulate pattern type external chill for aluminum alloy casting |
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|---|---|---|---|---|
| CN102019672A (en) * | 2010-12-10 | 2011-04-20 | 中山志和家电制品有限公司 | Exhaust device of injection mould |
| CN102922941A (en) * | 2012-11-19 | 2013-02-13 | 江苏中联铝业有限公司 | Vehicle wheel spoke typecasting insert block |
| CN207479529U (en) * | 2017-10-23 | 2018-06-12 | 浙江今飞摩轮有限公司 | A kind of hub of motorcycle mold equipped with insert |
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