CN114082890A - Manufacturing method of large-size dot matrix machine component - Google Patents
Manufacturing method of large-size dot matrix machine component Download PDFInfo
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- CN114082890A CN114082890A CN202111344961.0A CN202111344961A CN114082890A CN 114082890 A CN114082890 A CN 114082890A CN 202111344961 A CN202111344961 A CN 202111344961A CN 114082890 A CN114082890 A CN 114082890A
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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
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill 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
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Abstract
The invention relates to the technical field of aluminum processing, in particular to a manufacturing method of a large-size dot matrix machine component. The method comprises the following manufacturing steps: preparing a template, splicing, preparing a gypsum mold cavity reinforcing outer tool, assembling, preparing the gypsum mold cavity, casting, melting alloy materials, and cleaning. The invention has the advantages that: the problem that the large-size lattice structure cannot be normally manufactured in the prior art is solved, the manufacturing efficiency is improved, and the manufacturing cost is reduced.
Description
Technical Field
The invention relates to the technical field of aluminum processing, in particular to a manufacturing method of a large-size dot matrix machine component.
Background
The lattice sandwich structure has ideal explosion resistance and impact resistance. The lattice structure generally undergoes dynamic instability under impact load, and large plastic/elastic deformation occurs inside the structure, so that most impact energy is absorbed. This superelasticity combines its extremely high energy absorbing capacity and can be used as an impact resistant structure. For example, the tank protective armor can effectively protect internal personnel and equipment.
The method has the advantages that the method is difficult to manufacture, the metal lattice structure is a structure obtained by continuously arraying individual characteristics, the conventional casting method cannot manufacture a large-size lattice structural member at present, the required lattice structure can be obtained only by laser sintering of a 3D metal printer, but the large-size lattice structure can be obtained only by welding small printed lattice boards because the method can only rely on the 3D metal printer and is limited by the printing size. Therefore, a manufacturing method of a large-size dot matrix machine component is designed to solve the problems.
Disclosure of Invention
The invention aims to provide a method for manufacturing a large-size dot matrix machine component, so as to overcome the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for manufacturing a large-size dot matrix machine component comprises the following manufacturing steps:
s1, preparing a template, preparing a lattice structure model by using a 3D printer, and curing and airing after printing;
s2, splicing, namely mutually sticking the lattice structure models prepared in the step S1, smearing adhesive on the sticking surfaces among the lattice structure models, sticking the lattice structure models, and matching and sticking through an auxiliary tool in the sticking process;
s3, manufacturing a gypsum mold cavity reinforcing outer tool, designing the tool according to the lattice structure model to be a box type tool, and reserving a subsequent gypsum mold cavity preparation inlet on one side surface of one end of the box type tool;
s4, assembling, namely placing and fixing the lattice structure model in the tool prepared in the S3, supporting the lattice structure model on the tool in the front-back direction by a self-contained upright column in the front-back direction, placing foamed ceramic filter meshes for casting in the up-down and left-right directions for supporting, and penetrating a steel bar in the middle of the tool;
s5, preparing a gypsum mold cavity, placing the combined tool in a negative pressure vacuum box, vacuumizing the vacuum box, pouring the prepared special gypsum solution into the tool in a negative pressure state, waiting for the solution to be cured, opening two side surfaces of the tool after the solution is cured, feeding the tool into a roasting furnace, heating to 720 ℃, roasting, and placing the tool in an incubator at 400 ℃ for heat preservation after the roasting is finished;
and S6, casting preparation, melting alloy materials, placing the manufactured runner sand mold on a low-pressure equipment workbench, placing the prepared gypsum mold cavity on the sand mold, and placing the alloy liquid receiving sand mold on the gypsum mold cavity. Inflating and casting low-pressure equipment, wherein inflation pressure is 0.8bar, the pressure rise time is 8S, and then pressure is maintained for 18min at the pressure of 0.8 bar;
and S7, cleaning, namely cleaning the periphery by using a high-pressure water gun, wherein the pressure of the high-pressure water gun is set to be 8-10 bar.
Preferably, on the sticky face of gluing between the lattice structure model of 3D printer preparation, one end is seted up flutedly, the lug has been seted up to the one side, go into each other with the lug card through recess on two sets of lattice structure models, and glue and carry out fixed concatenation and form large-size lattice structure model, auxiliary fixtures need glue the sticky face with the lattice structure model and carry out spacingly, will glue the sticky face and correspond each other, face and face parallel arrangement, point parallel arrangement, cooperation glue glues sticky together each other.
Preferably, both ends are detachable around the frock.
Preferably, the steel bar is arranged in the tool in a penetrating mode, the tool is exposed from the two ends of the steel bar, the steel bar is not in contact with the lattice structure model, and the steel bar is placed in the gypsum mold cavity.
The invention has the beneficial effects that: the invention adopts a special casting technology, 3D printing lattice structure wax moulds are used, the wax moulds are soaked and dried, the wax moulds are spliced to manufacture large-size wax moulds, a pouring tool is manufactured, the wax moulds are placed and fixed in the tool, the tool is placed in a vacuum box, the vacuum box is vacuumized, the prepared special solution is poured into the tool in a vacuum state, the solution is waited for solidification, two side surfaces of the tool are opened after solidification is completed, the tool is sent into a roasting furnace for heating and roasting, the wax moulds are gasified in the roasting process to obtain a die cavity consistent with the lattice structure, and molten metal is injected into the die cavity to obtain the lattice structure.
Drawings
FIG. 1 is a partial assembled view of a method for fabricating a large-sized dot matrix component according to the present invention;
in the figure: 1. a lattice structure model; 2. assembling; 3. an inlet of a gypsum mold cavity; 4. a steel bar.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The embodiment is a method for manufacturing a large-size dot matrix machine component, which comprises the following manufacturing steps:
s1, preparing a template, preparing the lattice structure model 1 by using a 3D printer, and curing and airing after printing;
s2, splicing, namely mutually sticking the lattice structure models prepared in the step S1, smearing adhesive on the sticking surfaces among the lattice structure models, sticking the lattice structure models, and matching and sticking through an auxiliary tool in the sticking process;
s3, manufacturing a gypsum mold cavity reinforcing outer tool, designing a tool 2 according to the lattice structure model, designing a box type tool, and reserving a subsequent gypsum mold cavity preparation inlet 3 on one side surface;
s4, assembling, namely placing and fixing the lattice structure model in the tool prepared in the S3, supporting the lattice structure model on the tool in the front-back direction by a self-contained upright column in the front-back direction, placing foamed ceramic filter meshes for casting in the up-down and left-right directions for supporting, and penetrating a steel bar in the middle of the tool;
s5, preparing a gypsum mold cavity, placing the combined tool in a negative pressure vacuum box, vacuumizing the vacuum box, pouring the prepared special gypsum solution into the tool in a negative pressure state, waiting for the solution to be cured, opening two side surfaces of the tool after the solution is cured, feeding the tool into a roasting furnace, heating to 720 ℃, roasting, and placing the tool in an incubator at 400 ℃ for heat preservation after the roasting is finished; the temperature reaches 400 ℃ so that the molten aluminum is not rapidly solidified when being cast into the mold cavity, and if the temperature is too low, the molten aluminum is rapidly cooled when being cast into the mold cavity, and the molten aluminum cannot flow once the temperature is reduced to 660. The wax film (pma) can be gasified into carbon monoxide and carbon dioxide at the high temperature of 700 ℃, the wax film (pma) is gasified in the roasting process, and a die cavity consistent with the lattice structure is obtained after gasification.
And S6, casting preparation, melting alloy materials, placing the manufactured runner sand mold on a low-pressure equipment workbench, placing the prepared gypsum mold cavity on the sand mold, and placing the alloy liquid receiving sand mold on the gypsum mold cavity. Inflating and casting low-pressure equipment, wherein inflation pressure is 0.8bar, the pressure rise time is 8S, and then pressure is maintained for 18min at the pressure of 0.8 bar;
and S7, cleaning, namely cleaning the periphery by using a high-pressure water gun, wherein the pressure of the high-pressure water gun is set to be 8-10 bar. The pressure of the high-pressure water gun needs to be set to 10bar, otherwise, the metal dot matrix rod piece is broken due to overlarge pressure.
On the sticky face of gluing between the lattice structure model 1 of 3D printer preparation, one end is seted up flutedly, the lug has been seted up to the one side, go into through recess and lug on two sets of lattice structure models each other the card, and glue and carry out fixed concatenation and form large-size lattice structure model, auxiliary fixtures need glue the sticky face with the lattice structure model and carry out spacingly, will glue the sticky face and correspond each other, face and face parallel arrangement, point and some parallel arrangement, cooperation glue glues each other and glues and is stuck together. Can carry on spacingly to two sets of lattice structure models through supplementary frock board, guarantee can not the front and back alternately, face and the seamless butt joint of face also can be used for spacing lattice structure model through the auxiliary fixtures of special system, is carrying out the rubber coating concatenation, removes the concatenation along auxiliary fixtures and accomplishes.
Both ends are detachable around the frock. Can carry out the clamping through anchor clamps around the frock and fix, perhaps carry out fixed mounting through the bolt, both ends adopt the convenient casting of detachable mode around the frock, raise the efficiency.
The steel bar 4 is arranged in the tool in a penetrating mode, the tool is exposed from two ends of the steel bar, the steel bar is not in contact with the lattice structure model, and the steel bar is placed in the gypsum mold cavity. The steel bar is mainly used for supporting gypsum due to limited strength after subsequent gypsum roasting, and can fix the gypsum without falling off during overturning.
In the embodiment, a template is prepared, a 3D printer is selected to prepare a lattice structure wax mold (pma), and after printing is finished, solidification and drying are carried out; splicing, namely mutually sticking the prepared lattice structure models, coating adhesive on the sticking surfaces among the lattice structure models, sticking the lattice structure models, and matching and sticking through an auxiliary tool in the sticking process; manufacturing a gypsum mold cavity reinforcing outer tool, designing the tool according to the lattice structure model to form a box type tool, and reserving an inlet of a subsequent prepared gypsum mold cavity on the side surface of one end; assembling, namely placing and fixing a wax mould (pma) in a tool, supporting the wax mould (pma) on the tool in the front-back direction by a self-contained upright post on the wax mould (pma) in the front-back direction, and placing a foamed ceramic filter mesh for casting in the up-down left-right direction for supporting. The filter mesh is placed to fix the wax film (pma), the gypsum flow cannot be blocked when a gypsum mold cavity is prepared subsequently, the alloy lattice cannot be influenced when the alloy lattice is prepared at the rear section, and a 316l steel bar needs to be penetrated in the middle (the main effect is that the strength is limited after the subsequent gypsum is roasted and is used for supporting the gypsum); preparing a gypsum mold cavity, placing the combined tool in a negative pressure vacuum box, vacuumizing the vacuum box, pouring the prepared special solution (gypsum) into the tool in a negative pressure state, waiting for the solution to be cured, opening two side surfaces of the tool after the solution is cured, sending the tool into a roasting furnace, heating to 720 ℃, roasting (the wax film (pmma) is gasified into carbon monoxide and carbon dioxide at the high temperature of 700 ℃), gasifying the wax film (pmma) in the roasting process, obtaining a mold cavity consistent with a lattice structure after gasification, and placing the mold cavity in a heat preservation box for heat preservation at the temperature of 400 ℃ after roasting is finished; the temperature reaches 400 ℃ so that the molten aluminum is not rapidly solidified when being cast into the mold cavity, and if the temperature is too low, the molten aluminum is rapidly cooled when being cast into the mold cavity, and the molten aluminum cannot flow once the temperature is reduced to 660. After the inner container is heated to 400 ℃, the surface of the inner container can be melted after the inner container absorbs the temperature of the aluminum alloy liquid during casting, and the aluminum alloy liquid can be attached to the melted wall of the inner container during casting; casting preparation, melting alloy materials (mainly aluminum alloy, heating aluminum liquid to 710 ℃, removing hydrogen through a degassing machine), placing the manufactured pouring gate sand mold on a low-pressure equipment workbench, placing the prepared gypsum mold cavity (with temperature) on the sand mold, and placing the alloy liquid bearing sand mold on the gypsum mold cavity. Inflating and casting low-pressure equipment, wherein inflation pressure is 0.8bar, the pressure rise time is 8S, and then pressure is maintained for 18min at the pressure of 0.8 bar; the molten aluminum fluid has a back pressure after filling, which is equivalent to a pressure of 0.8bar for the back of the molten aluminum, pushes the molten aluminum into the mold cavity, so that the solidification shrinkage defect of the molten aluminum is avoided, the molten aluminum and the inner container are more tightly melted and attached, the mold is taken down and opened after the pressure maintaining is finished, and the casting of the casting is finished; in the alloy liquid flowing process, the alloy liquid firstly passes through a sand mold pouring gate, then passes through a columnar cavity reserved after the front end supporting upright post is roasted, then enters a lattice structure cavity, is discharged into a receiving sand mold from the rear end upright post, and waits for cooling after the metal liquid is filled; and (3) cleaning the pattern by using a high-pressure water gun along the periphery (the pressure of the high-pressure water gun needs to be set to 10bar, otherwise, the metal dot matrix rod piece is fractured due to overlarge pressure, and a complete dot matrix structure part can be obtained after the cleaning is finished.
The invention has the beneficial effects that a special casting technology is adopted, a 3D printing lattice structure wax mould is used, the wax mould is soaked and dried, the wax mould is spliced to manufacture a large-size wax mould, a pouring tool is manufactured, the wax mould is placed and fixed in the tool, the tool is placed in a vacuum box, the vacuum box is vacuumized, the prepared special solution is poured into the tool in a vacuum state, the solution is waited for solidification, two side surfaces of the tool are opened after the solidification is finished, the tool is sent into a roasting furnace for heating and roasting, the wax mould is gasified in the roasting process to obtain a mould cavity consistent with the lattice structure, and the lattice structure is obtained by injecting metal liquid into the mould cavity.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A method for manufacturing a large-size dot matrix machine component is characterized by comprising the following steps: the method comprises the following manufacturing steps:
s1, preparing a template, preparing a lattice structure model by using a 3D printer, and curing and airing after printing;
s2, splicing, namely mutually sticking the lattice structure models prepared in the step S1, smearing adhesive on the sticking surfaces among the lattice structure models, sticking the lattice structure models, and matching and sticking through an auxiliary tool in the sticking process;
s3, manufacturing a gypsum mold cavity reinforcing outer tool, designing the tool according to the lattice structure model to be a box type tool, and reserving a subsequent gypsum mold cavity preparation inlet on one side surface of one end of the box type tool;
s4, assembling, namely placing and fixing the lattice structure model in the tool prepared in the S3, supporting the lattice structure model on the tool in the front-back direction by a self-contained upright column in the front-back direction, placing foamed ceramic filter meshes for casting in the up-down and left-right directions for supporting, and penetrating a steel bar in the middle of the tool;
s5, preparing a gypsum mold cavity, placing the combined tool in a negative pressure vacuum box, vacuumizing the vacuum box, pouring the prepared special gypsum solution into the tool in a negative pressure state, waiting for the solution to be cured, opening two side surfaces of the tool after the solution is cured, feeding the tool into a roasting furnace, heating to 720 ℃, roasting, and placing the tool in an incubator at 400 ℃ for heat preservation after the roasting is finished;
s6, casting preparation, melting alloy materials, smelting the alloy to be cast, placing the manufactured runner sand mold on a low-pressure equipment workbench, placing the prepared gypsum mold cavity on the sand mold, and placing the alloy-bearing liquid sand mold on the gypsum mold cavity; inflating and casting low-pressure equipment, wherein inflation pressure is 0.8bar, the pressure rise time is 8S, and then pressure is maintained for 18min at the pressure of 0.8 bar;
and S7, cleaning, namely cleaning the periphery by using a high-pressure water gun, wherein the pressure of the high-pressure water gun is set to be 8-10 bar.
2. The method of claim 1, wherein the method comprises the steps of: on the sticky face of gluing between the lattice structure model of 3D printer preparation, one end is seted up flutedly, the lug has been seted up to the one side, go into through recess and lug on two sets of lattice structure models each other the card, and glue and carry out fixed concatenation and form large-size lattice structure model, auxiliary fixtures need glue the sticky face with the lattice structure model and carry out spacingly, will glue sticky face and correspond each other, face and face parallel arrangement, point and some parallel arrangement, cooperation glue glues each other and glues and is stuck together.
3. The method of claim 1, wherein the method comprises the steps of: both ends are detachable around the frock.
4. The method of claim 1, wherein the method comprises the steps of: the steel bar is arranged in the tool in a penetrating mode, the tool is exposed from two ends of the steel bar, the steel bar is not in contact with the lattice structure model, and the steel bar is placed in the gypsum mold cavity.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117840387A (en) * | 2024-03-08 | 2024-04-09 | 苏州美迈快速制造技术有限公司 | Precision casting die of skin lattice structure and production method |
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