CN110666110A - Processing method of casting mold for special-shaped conformal cooling water channel - Google Patents
Processing method of casting mold for special-shaped conformal cooling water channel Download PDFInfo
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- CN110666110A CN110666110A CN201910861925.8A CN201910861925A CN110666110A CN 110666110 A CN110666110 A CN 110666110A CN 201910861925 A CN201910861925 A CN 201910861925A CN 110666110 A CN110666110 A CN 110666110A
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- mold
- water channel
- cooling water
- conformal cooling
- conformal
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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
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
Abstract
The invention discloses a processing method of a special-shaped conformal cooling water channel casting mold, which comprises the steps of drawing the shape of a mold conformal cooling water channel by using 3D software, determining the diameter Do of the mold conformal cooling water channel according to an optimal value recommended by mold flow analysis, drawing rolling inscribed balls tangent to the inner side surface and the outer side surface of the mold along the distance of the mold conformal water channel, rolling along the 3D graph inner cavity of the mold of the conformal water channel by using the rolling inscribed balls, determining the optimal position of the conformal water channel uniformly distributed in the mold, and determining the optimal distribution position and size of internal cooling iron in the mold inner cavity by using various inscribed balls; the invention does not need to adopt complicated fluid mechanics calculation, but directly draws the size of the internal cutting ball of the mould according to the 3D graph of the mould and carries out rolling along the working surface of the mould cavity, so that the actual conditions of the shape-following cooling water channel parameters, the distribution of internal chill and the mould size can be quickly determined, the processing efficiency of the special-shaped shape-following cooling water channel casting mould is greatly improved, and the efficiency of the production cycle of the whole product is improved.
Description
Technical Field
The invention particularly relates to a design method of a casting mold, and particularly relates to a processing method of a casting mold of a special-shaped conformal cooling water channel.
Background
During the process of processing and forming the die, firstly, the distribution positions and the sizes of a conformal cooling water channel and internal chill in the die are determined, a water channel sand mold is manufactured after the distribution positions and the size specifications of conformal cooling water are determined, then the conformal cooling water channel and the internal chill are placed in a forming die cavity of the die according to the determined positions for casting and forming, different cooling schemes are generally adopted for the design of the conformal cooling water channel, die flow analysis is carried out through Moldflow software, the cooling effect and the pipeline pressure distribution of different cooling schemes are compared, the internal chill used for cooling is generally arranged in the casting die, the distribution positions of the internal chill and the distribution condition of the conformal cooling water channel in the internal chill need to adopt complicated fluid mechanics calculation, then the optimal scheme is selected for the design of inserts of the conformal cooling water channel die, and the implementation period of the scheme is longer, the capital investment cost is large.
Therefore, in order to solve the above problems, there is a need for a method for processing a casting mold, which can quickly determine the sizes of the conformal cooling water channel and the internal chill in the casting mold, and the casting mold itself.
Disclosure of Invention
The invention aims to provide a processing method of a casting mold of a special-shaped conformal cooling water channel, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a processing method of a casting mold of a special-shaped conformal cooling water channel comprises the following steps:
1) drawing the shape of the mold conformal cooling water channel by using 3D software, and determining the diameter Do of the mold conformal cooling water channel according to the optimal value recommended by the mold flow analysis;
2) drawing a rolling inscribed ball which is tangent to the inner side surface and the outer side surface of the mold along the interval of the mold conformal cooling water channels: the diameter of an inscribed sphere between the horizontal conformal cooling water channels is Ds, the diameter of an inscribed sphere between the vertical conformal cooling water channels is Dz, the diameter of an inscribed sphere between the conformal cooling water channels and the inner cavity wall of the mold is Dq, and the diameter of an inscribed sphere between the conformal cooling water channels and the outer wall of the mold is Dw, so that the parameter size of the conformal cooling water channels is determined according to Ds and Dz, the distribution positions of the conformal cooling water channels and the inner cavity of the mold can be determined according to Dq, and the thickness of the outer cavity of the mold can be determined according to the Dw;
3) determining the diameter range of each inscribed sphere according to the type of the mould, and for the mould containing a cavity, arranging the shape following water channel around the periphery of the cavity, wherein the diameter of the inscribed sphere needs to be determined to comprise Dz, Dq and Dw, and each diameter range is as follows: dz is (2-4) Do, Dq is (1-1.5) Do, Dw is (1-4) Do, for the mould that only contains conformal cooling water course, wherein the inscribed sphere diameter that needs to confirm includes Ds, Dz, Dw, and each diameter range is: ds ═ 1-2 × Do, Dz ═ 2-4 × Do, and Dw ═ 1-4 × Do.
4) Determining an internal cooling position according to the inscribed sphere: the inner chill comprises outer ring inner chills distributed on the periphery of the conformal water channel and inner ring inner chills distributed on the inner ring of the conformal water channel, the vertical central line of the conformal water channel and the die outer wall inscribed ball is the central line of the outer ring inner chills vertically arranged, and the diameter range of the outer ring inner chills is as follows: (1-1.5) Do, wherein the vertical central line of an inscribed ball between the shape following water channels in the horizontal direction is the central line of the inner ring of the internal chill, and the diameter range of the inner ring of the internal chill is (0.8-1.8) Do.
5) Determining the size of a forming die of the die according to die parameters, manufacturing a conformal cooling water channel sand mold and an inner chill according to the distribution position and the size of the conformal cooling water channel and the distribution position and the size of the inner chill, setting the conformal cooling water channel sand mold and the inner chill in the forming die, then casting the forming die, cooling and demolding the forming die to obtain a special-shaped conformal cooling water channel casting die, and finishing processing.
Further scheme: and (3) performing modular flow analysis in the step (1) by adopting a Moldflow software, and calculating optimal data by using the Moldflow software to determine the diameter Do of the conformal cooling water channel.
Further scheme: the value range of the Do is as follows: 10 mm-12 mm.
Further scheme: and 5, forming the conformal cooling water channel in the step 5 by adopting a 3D printing mode.
Compared with the prior art, the invention has the beneficial effects that: the invention does not need to adopt complicated fluid mechanics calculation, but directly draws the size of the inner tangent ball of the mould according to the 3D graph of the mould and carries out rolling along the working surface of the mould cavity, so that the invention can quickly determine the self parameter size of the conformal cooling water channel, the distribution positions of the conformal cooling water channel and the mould cavity in the mould, determine the thickness of the outer cavity of the mould and the position and the diameter of the inner chill in the mould by the conformal cooling water channel, and greatly improve the production efficiency of the casting mould.
Drawings
Fig. 1 is a schematic structural diagram of an inscribed sphere of a lunch box mold cast by a method of casting the mold by using a special-shaped conformal cooling water channel (embodiment 1).
Fig. 2 is a schematic structural view of the position of the chill in the die of the lunch box of fig. 1 (example 1).
Fig. 3 is a schematic structural view of an inscribed sphere of an outer mold of a heart-shaped cup cast by using a method of casting a mold with a special-shaped conformal cooling water channel (example 2).
Fig. 4 is a schematic structural view of the position of the chill inside the central cup-shaped outer mold of fig. 3 (example 2).
Fig. 5 is a schematic structural view of an inscribed sphere of a mold in a heart-shaped cup cast by a method of casting the mold by using a special-shaped conformal cooling water channel (example 3).
In the figure: the structure comprises a lunch box die 1, a lunch box conformal cooling water channel 10, a lunch box water channel internal cutting ball 11, a lunch box peripheral internal cutting ball 12, a lunch box central internal cutting ball 13, lunch box peripheral internal cooling iron 14, lunch box central internal cooling iron 15, a heart-shaped cup external die 2, a heart-shaped forming cavity 20, an external mold conformal cooling water channel 21, an external mold peripheral internal cutting ball 22, an external mold water channel internal cutting ball 23, an external mold forming cavity internal cutting ball 24, an external mold water channel interval internal cutting ball 25, a heart-shaped cup internal die 3, an internal mold conformal cooling water channel 30, a water guide cavity 31, an internal mold water channel internal cutting ball 32, an internal mold peripheral internal cutting ball 33, an internal mold central internal cutting ball 34 and an internal mold water channel interval internal cutting ball 35.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-2, in this embodiment, taking the mold 1 as an example, in the actual design of the mold 1, only a single layer conformal cooling water channel is needed, and therefore Dz is not needed to be set, and only Ds, Dw, the position of the inner chill in the outer ring and the position of the inner chill in the inner ring need to be determined.
Drawing a lunch box conformal cooling water channel 10 of a lunch box mold 1 by using 3D software, calculating optimal data by using a Moldflow software to determine a diameter Do of the lunch box conformal cooling water channel 10, namely the diameter of an inner cutting ball 11 of the lunch box water channel in the drawing 1 is Do, respectively determining a peripheral cross-sectional thickness of the water channel and a central cross-sectional thickness of the water channel by rolling the inner cutting ball along the outer side wall and the inner side wall of the tableware conformal water channel to obtain a peripheral inner cutting ball 12 of the lunch box and a central inner cutting ball 13 of the lunch box, wherein the diameter of the peripheral inner cutting ball 12 of the lunch box is Do (Dw), the diameter of the central inner cutting ball 13 of the lunch box is 1.5Do (Ds), using the center line of the peripheral inner cutting ball 12 of the lunch box as a reference, vertically arranging inner cooling irons 14 (namely outer ring inner cooling irons) of the lunch box distributed around the lunch box cooling water channel 10 at the bottom of the lunch box mold 1, the diameter of the peripheral inner cooling, and arranging a lunch box center internal chill 15 (namely the internal inner chill) at the center of the bottom in the lunch box die 1, wherein the diameter of the lunch box center internal chill 15 is 1.2Do, thus the center of the lunch box die 1, the thickness of the section of the outer side and the position of the internal chill are determined, setting a conformal cooling water channel sand mold and the internal chill according to the parameters, then placing the conformal cooling water channel sand mold and the internal chill in a cavity of a forming die, casting, cooling and demoulding to obtain a finished lunch box die. The internal chill 15 can be made of a similar metal material having a melting point lower than the molten metal to be cast, such as an aluminum bar for casting aluminum alloy; and casting the steel part, wherein the internal chill 15 is an iron rod. The casting mold can absorb a large amount of heat of molten metal in the casting process, so that the effects of rapidly cooling the temperature in the mold and uniformly solidifying the molten metal are achieved, and the generation of shrinkage cavity after the molten metal is solidified is avoided. And after absorbing certain heat, the internal chill 15 can melt itself, thereby ensuring that the mold can be smoothly released after being cooled.
Example 2
Referring to fig. 3 to 4, in the embodiment, a heart-shaped outer mold 2 is taken as an example, and a heart-shaped forming cavity 20 is formed in the center of the outer mold 2, so that the parameters to be determined include Dz, Dq, Dw and the position and diameter of the inner chill in the outer ring, in the embodiment of the present invention, a method for casting a mold with a special-shaped conformal cooling water channel includes the following steps:
drawing an outer die conformal cooling water channel 21 of the heart-shaped cup outer die 2 by using 3D software, vertically arranging the outer die conformal cooling water channel around the outer side wall of the heart-shaped forming cavity 20 respectively, performing die flow analysis by using Moldflow software to calculate optimal data to determine the diameter Do of the outer die conformal cooling water channel 21, wherein the die parameters to be determined comprise the vertical interval of the outer die conformal cooling water channel 21, the distance between the outer die conformal cooling water channel 21 and the outer wall of the heart-shaped forming cavity 20, the section thickness of the outer die conformal cooling water channel 21 and the periphery of the heart-shaped cup outer die 2 and the position of internal chill inside the heart-shaped cup outer die 2, the diameter of an external die water channel internal cutting ball 23 inside an inner cavity of the outer die conformal cooling water channel 21 is Do, rolling the internal cutting balls on the side walls of the two sides of the outer die conformal cooling water channel 21 respectively, and being tangent to the outer side wall of the heart-shaped forming cavity 20 and the inner side, obtaining an external mold molding cavity internal cutting ball 24 and an external mold peripheral internal cutting ball 22, rolling and tangency the internal cutting balls on the outer walls of the adjacent water channels in the vertical direction to obtain an external mold water channel interval internal cutting ball 25, wherein the diameter of the external mold molding cavity internal cutting ball 24 is 1.2Do (namely Dq), the diameter of the external mold peripheral internal cutting ball 22 is 2.5Do (namely Dw), the diameter of the external mold water channel interval internal cutting ball 25 is 3Do (namely Dz), the position of the external mold internal cooling iron 25 is the vertical central line of the external mold peripheral internal cutting ball 22, the diameter of the external mold internal cooling iron 25 is Do (namely outer ring internal cooling iron), setting the conformal cooling water channel sand mold and the internal cooling iron according to the parameters, then placing the external mold internal cutting ball 24 and the external mold internal cutting ball 22 into a mold cavity, and casting, cooling and demolding to obtain a. Besides the function of positioning and supporting the conformal cooling water channel 21, the outer-die inner-cooling iron 25 can also be made of the same material as the inner-cooling iron 15, thereby playing the role of auxiliary cooling. In fact, according to the principle of cooling and solidifying the metal from outside to inside, even if the external mold internal chill 25 is melted under the influence of the latent heat of the subsequent molten metal, the metal surface is already cooled and solidified, so when the external mold internal chill 25 is melted, the conformal cooling water channels 21 are not displaced and deformed.
Example 3
Referring to fig. 5, in the present embodiment, taking the heart-shaped cup inner mold 3 as an example, only the conformal cooling water channel is disposed inside the heart-shaped cup inner mold 3, and therefore the parameters to be determined include: ds, Dz and Dw, in the embodiment of the invention, the method for casting the mould of the special-shaped conformal cooling water channel comprises the following steps:
drawing an inner die conformal cooling water channel 30 of the heart-shaped cup inner die 3 by using 3D software, wherein the middle part of the inner die conformal cooling water channel 30 is provided with a water guide cavity 31, performing die flow analysis by using Moldflow software to calculate optimal data to determine the diameter Do of the inner die conformal cooling water channel 30, namely the diameter of an inner die water channel inner cutting ball 32 clamped in the inner die conformal cooling water channel 30, rolling the inner cutting balls on two sides of the inner die conformal cooling water channel 30 respectively to obtain an inner die center inner cutting ball 34 tangent to the water guide cavity 31 and the side wall of the inner die conformal cooling water channel 30, obtaining a tangent inner die periphery inner cutting ball 33 connected to the side wall of the heart-shaped cup inner die 3 and the side wall of the inner die conformal cooling water channel 30, rolling and tangent between adjacent water channels in the vertical direction to form an inner die water channel interval inner cutting ball 35, wherein the diameter of the inner die water channel interval inner cutting ball 35 is 3Do (namely Dz), and the diameter of the inner die periphery inner cutting ball 33 is 1.5, and taking the diameter of the inner cutting ball 34 at the center of the inner mold as 1.5Do (namely Ds), setting the conformal cooling water channel sand mold and the inner chill according to the parameters, then placing the conformal cooling water channel sand mold and the inner chill into a cavity of a forming mold, and casting, cooling and demolding to obtain a finished product of the mold in the heart-shaped cup.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A processing method of a casting mold of a special-shaped conformal cooling water channel comprises the following steps:
1) drawing the shape of the mold conformal cooling water channel by using 3D software, and determining the diameter Do of the mold conformal cooling water channel according to the optimal value recommended by the mold flow analysis;
2) drawing a rolling inscribed ball which is tangent to the inner side surface and the outer side surface of the mold along the interval of the mold conformal cooling water channels: the diameter of an inscribed sphere between the horizontal conformal cooling water channels is Ds, the diameter of an inscribed sphere between the vertical conformal cooling water channels is Dz, the diameter of an inscribed sphere between the conformal cooling water channels and the inner cavity wall of the mold is Dq, and the diameter of an inscribed sphere between the conformal cooling water channels and the outer wall of the mold is Dw, so that the parameter size of the conformal cooling water channels is determined according to Ds and Dz, the distribution positions of the conformal cooling water channels and the inner cavity of the mold can be determined according to Dq, and the thickness of the outer cavity of the mold can be determined according to the Dw;
3) determining the diameter range of each inscribed sphere according to the type of the mould, and for the mould containing a cavity, arranging the shape following water channel around the periphery of the cavity, wherein the diameter of the inscribed sphere needs to be determined to comprise Dz, Dq and Dw, and each diameter range is as follows: dz is (2-4) Do, Dq is (1-1.5) Do, Dw is (1-4) Do, for the mould that only contains conformal cooling water course, wherein the inscribed sphere diameter that needs to confirm includes Ds, Dz, Dw, and each diameter range is: ds ═ 1-2 × Do, Dz ═ 2-4 × Do, Dw ═ 1-4 × Do;
4) determining an internal cooling position according to the inscribed sphere: the inner chill comprises outer ring inner chills distributed on the periphery of the conformal water channel and inner ring inner chills distributed on the inner ring of the conformal water channel, the vertical central line of the conformal water channel and the die outer wall inscribed ball is the central line of the outer ring inner chills vertically arranged, and the diameter range of the outer ring inner chills is as follows: (1-1.5) Do, wherein the vertical central line of an inscribed ball between the shape following water channels in the horizontal direction is the central line of the inner ring of the internal chill, and the diameter range of the inner ring of the internal chill is (0.8-1.8) Do.
5) Determining the molding size of the mold according to the mold parameters, manufacturing a conformal cooling water channel sand mold and arranging internal chill according to the distribution position and size of the conformal cooling water channel and the distribution position and size of the internal chill, casting the molding mold, and demolding the molding mold after cooling to obtain the special-shaped conformal cooling water channel casting mold.
2. The processing method for the casting mold of the special-shaped conformal cooling water channel according to claim 1, wherein the mold flow analysis in the step 1) adopts Moldflow software, and the Moldflow software performs the mold flow analysis to calculate optimal data to determine the diameter Do of the conformal cooling water channel.
3. The processing method of the special-shaped conformal cooling water channel casting mold according to claim 1, wherein the value range of Do is as follows: 10 mm-12 mm.
4. The processing method of the casting mold of the special-shaped conformal cooling water channel according to claim 1, wherein the conformal cooling water channel in the step 5) is formed by 3D printing.
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