A method for manufacturing an ultra-thin part

Abstract

The present invention provides a method for manufacturing an ultra-thin part, comprising: Step 1, assembling an insulation box, a thin-walled shell mold and a liquid runner into a manufacturing device; Step 2, loading the manufacturing device into a roasting furnace for preheating until the preheating temperature of the thin-walled shell mold ≥ 450 °C; Step 3, quickly moving the manufacturing device into a vacuum consumable electrode melting furnace to pour molten metal. In the present invention, the thin-walled shell mold together with the insulation box is loaded into the roasting furnace for preheating and then quickly moved into the vacuum consumable electrode melting furnace for pouring. The thin-walled shell mold with a relatively high temperature can significantly reduce its chilling effect, increase the fluidity of the molten metal, avoid premature solidification of the ultra-thin part during pouring, and improve the filling ability of the molten metal.

Description

Technical Field

[0001] The present invention relates to the technical field of ingot hot forming processing, and particularly to a method for manufacturing ultra-thin parts. Background Art

[0002] As a raw material for manufacturing thin-walled parts of non-ferrous metals, ingots represent the development direction in the field of rapid manufacturing. The technological process for manufacturing non-ferrous metal parts generally includes: melting the ingot into a metal liquid under the action of heat, and then cooling and solidifying the metal liquid to form a thin-walled part.

[0003] Currently, when vacuum melting titanium and zirconium materials, when the molten titanium and zirconium metal liquids of the ingot are being poured, the molten titanium and zirconium metal liquids will flow along the wall surface of the graphite mold shell during filling. The rapid cooling effect of the graphite mold shell increases the viscosity of the metal liquid and reduces its fluidity, thereby making the flow filling ability of the metal liquid worse, and even causing premature cooling and solidification, which easily leads to phenomena such as undercasting and lack of material during the forming of thin-walled parts. Especially for ultra-thin walled parts made of titanium and zirconium materials, undercasting and lack of material are very likely to occur during forming, and the yield rate is extremely low.

[0004] How to improve the yield rate of titanium and zirconium thin-walled parts has become an urgent problem to be solved. Summary of the Invention

[0005] The present invention provides a method for manufacturing ultra-thin parts. After the thin-walled mold shell is preheated in a roasting furnace to above 450°C, it is transferred to a vacuum consumable electrode melting furnace. The high-temperature thin-walled mold shell is insulated by using a heat-insulating material to bury the thin-walled mold shell, so as to increase the temperature of the thin-walled mold shell entering the vacuum consumable electrode melting furnace, improve the fluidity of the metal liquid, and increase the yield rate of ultra-thin parts.

[0006] The technical solution for achieving the purpose of the present invention is as follows:

[0007] The present invention provides a method for manufacturing ultra-thin parts, including:

[0008] Step 1: Assemble an insulation box, a thin-walled mold shell, and a liquid runner into a manufacturing device;

[0009] Step 2: Load the manufacturing device into a roasting furnace for preheating until the preheating temperature of the thin-walled mold shell ≥ 450°C;

[0010] Step 3: Quickly transfer the manufacturing device into a vacuum consumable electrode melting furnace to pour the metal liquid.

[0011] In the present invention, the thin-walled mold shell together with the insulation box is loaded into a roasting furnace for preheating and then quickly transferred into a vacuum consumable electrode melting furnace for pouring. The thin-walled mold shell with a relatively high temperature can significantly reduce its rapid cooling effect, increase the fluidity of the metal liquid, avoid premature solidification of the ultra-thin parts during pouring, and improve the filling ability of the metal liquid.

[0012] In a possible implementation manner, step three further includes:

[0013] The molten metal fills the liquid storage cup with a certain diameter. The molten metal is shunted through the liquid runner, and the liquid runner diverts the molten metal to the thin-walled mold shell. The molten metal in the thin-walled mold shell forms an ultra-thin part in a vacuum skull furnace.

[0014] In a possible implementation manner, the manufacturing device in step one includes:

[0015] A heat preservation box filled with heat preservation materials, and the heat preservation box is alternately placed in a roasting furnace or a vacuum skull furnace;

[0016] At least one thin-walled mold shell buried between the heat preservation materials, and the thin-walled mold shell is located in the middle of the heat preservation box in the height direction;

[0017] A liquid runner connecting the thin-walled mold shell and the outside of the heat preservation box, and the liquid runner is located in the upper part of the heat preservation box and is connected to each thin-walled mold shell.

[0018] The heat preservation box of the present invention has a heat preservation function. The thin-walled mold shell together with the heat preservation box is loaded into the roasting furnace for preheating and then quickly transferred to the vacuum skull furnace for pouring. The thin-walled mold shell has a relatively high temperature, which can significantly reduce its chilling effect, increase the fluidity of the molten metal, avoid premature solidification of the ultra-thin part during pouring, and improve the filling ability of the molten metal.

[0019] In a possible implementation manner, the thin-walled mold shell includes at least one ultra-thin part mold shell made of graphite material and at least one ultra-thin part mold shell made of ordinary material;

[0020] Both the ultra-thin part mold shell made of graphite material and the ultra-thin part mold shell made of ordinary material are connected to the liquid runner;

[0021] The ultra-thin part mold shell made of graphite material is buried in the middle of the heat preservation box in the length direction, and the ultra-thin part mold shell made of ordinary material is buried in the side part of the heat preservation box in the length direction.

[0022] The present invention places the ultra-thin part mold shell made of graphite material in the middle of the heat preservation box in the length direction, and the ultra-thin part mold shell made of ordinary material is located on both sides of the ultra-thin part mold shell made of graphite material. The thin-walled mold shell together with the heat preservation box is placed in the roasting furnace. Most of the heat heats the ultra-thin part mold shell made of graphite material and the ultra-thin part mold shell made of ordinary material through the liquid runner, and a small part of the heat heats the ultra-thin part mold shell made of graphite material and the ultra-thin part mold shell made of ordinary material through the box body of the heat preservation box through the heat preservation materials. In this way, the temperature of the ultra-thin part mold shell made of graphite material is higher than that of the ultra-thin part mold shell made of ordinary material, which is more conducive to reducing the chilling effect of the ultra-thin part mold shell made of graphite material.

[0023] In a possible implementation, the diameter of the liquid runner connecting the ultra-thin part shell made of graphite material > the diameter of the liquid runner connecting the ultra-thin part shell made of ordinary material.

[0024] In the present invention, the diameter of the liquid runner connecting the graphite shell is larger than that of the ordinary shell, mainly to heat the ultra-thin part shell made of graphite material, so that the temperature of the ultra-thin part shell made of graphite material is higher than that of the ultra-thin part shell made of ordinary material.

[0025] In a possible implementation, the heat-insulating materials in the box body of the heat-insulating box include: heat-insulating sand for embedding the thin-walled shell, and heat-insulating cotton arranged to surround the heat-insulating sand;

[0026] The heat-insulating cotton is in contact with the inner wall of the box body;

[0027] The liquid runner is buried in the heat-insulating sand;

[0028] Both the box body and the heat-insulating cotton are provided with channel openings, and the channel openings are connected to the inlet of the liquid runner.

[0029] In the present invention, the thin-walled shell is buried in the heat-insulating material. The heat-insulating material has a two-layer structure. The outer-layer heat-insulating material is made of silicon, aluminum, calcium, zirconium and other composite refractory cotton, and the thickness of the refractory cotton needs to be ≥50 mm; the inner-layer heat-insulating material is made of silicon, aluminum, calcium, zirconium and other composite refractory sand for precision investment casting of the mold shell, or waste sand of the precision investment casting mold shell with a mesh size greater than 100. The internal heat-insulating material also needs to be tightly filled in the cavity part of the casting mold.

[0030] In a possible implementation, the manufacturing device in step one further includes:

[0031] A liquid cup arranged at the inlet of the liquid runner. The liquid cup penetrates through the top wall of the heat-insulating box and is connected to the inlet of the liquid runner.

[0032] The purpose of setting the liquid cup in the present invention is, on the one hand, to facilitate the pouring of molten metal, and on the other hand, to increase the heating speed of the thin-walled shell in the roasting furnace.

[0033] In a possible implementation, when the manufacturing device in step two is loaded into the roasting furnace for preheating, the ultra-thin part shell made of graphite material in the thin-walled shell is preheated to 700 - 800 °C, and the ultra-thin part shell made of ordinary material in the thin-walled shell is preheated to 200 - 300 °C.

[0034] In a possible implementation, between step two and step three, it further includes: after the manufacturing device is removed from the roasting furnace, a heating device is inserted into the liquid cup of the manufacturing device to heat the thin-walled shell again until the heating device is removed when the manufacturing device is transported to the vacuum skull furnace, and then the manufacturing device is moved into the vacuum skull furnace.

[0035] In a possible implementation, after the manufacturing device is removed from the roasting furnace, the user holds the holding part and inserts the heating device into the liquid holding cup of the manufacturing device;

[0036] Start the heating device. The air outside the manufacturing device flows through the air outlet hole, liquid pouring channel, reflux cavity and reflux pipe of the manufacturing device in sequence and then enters the second airtight cavity of the heating device. The second airtight cavity stores high-temperature inert gas. The electromagnetic induction controller controls the electromagnetic induction coil to be energized to generate an alternating current magnetic field. The magnetic conduction tube located in the alternating current magnetic field generates eddy currents due to electromagnetic induction and heats up. The high-temperature inert gas flowing out of the second airtight cavity flows through the magnetic conduction tube and is heated into ultra-high-temperature inert gas. The ultra-high-temperature inert gas is stored in the first airtight cavity and then flows into the manufacturing device from the first airtight cavity to continuously heat the thin-walled mold shell;

[0037] The high-temperature inert gas and ultra-high-temperature inert gas alternate between the liquid pouring channel, reflux cavity, reflux pipe, second airtight cavity, magnetic conduction tube, first airtight cavity and liquid pouring channel until the electromagnetic induction controller controls the heating device to stop working when the manufacturing device is transported to the vacuum skull furnace, and the heating device is taken out from the liquid holding cup.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] The thin-walled mold shell of the present invention is loaded into the roasting furnace together with the heat preservation box for preheating and then quickly transferred to the vacuum skull furnace for pouring. The thin-walled mold shell has a relatively high temperature, which can significantly reduce its chilling effect, increase the fluidity of the molten metal, avoid premature solidification of the ultra-thin parts during pouring, and improve the filling ability of the molten metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a flowchart of a method for manufacturing ultra-thin parts provided by the present invention;

[0041] Figure 2 It is a schematic structural diagram of the manufacturing device provided by the present invention;

[0042] Figure 3 It is a schematic diagram of the heating device inserted into the manufacturing device provided by the present invention;

[0043] In the figure, 1 - liquid holding cup; 2 - box body; 3 - heat preservation cotton; 4 - heat preservation sand; 5 - liquid pouring channel; 6 - ultra-thin part mold shell of ordinary material; 7 - ultra-thin part mold shell of graphite material; 8 - support seat; 9 - insert; 10 - first airtight cavity; 11 - reflux cavity; 12 - magnetic conduction tube; 13 - electromagnetic induction coil; 14 - electromagnetic induction controller; 15 - reflux pipe; 16 - gas storage part; 17 - second airtight cavity; 18 - holding part. DETAILED DESCRIPTION OF THE INVENTION

[0044] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. It should be noted that these embodiments are not intended to limit the present invention. Any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present invention.

[0045] In the description of this embodiment, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0046] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0047] Please refer to Figure 1 , an embodiment of the present invention provides a method for manufacturing an ultra-thin part, including:

[0048] Step 1: Assemble an insulation box, a thin-walled shell mold, and a liquid runner into a manufacturing device;

[0049] Step 2: Load the manufacturing device into a roasting furnace for preheating until the preheating temperature of the thin-walled shell mold ≥ 450 °C;

[0050] Step 3: Quickly move the manufacturing device into a vacuum consumable electrode melting furnace to pour molten metal.

[0051] It should be noted that in order to prevent the temperature of the thin-walled shell mold from decreasing during the transportation from the roasting furnace to the manufacturing device and affecting the pouring effect, please refer to Figure 2 and Figure 3The manufacturing device of the embodiment of the present invention is inserted with a heating device. After the manufacturing device is moved out of the roasting furnace, the user holds the grip 18 and inserts it into the heating device from the liquid cup 1 of the manufacturing device to start the heating device. The air outside the manufacturing device flows through the air outlet, liquid runner 5, reflux chamber 11 and reflux pipe 15 of the manufacturing device in sequence and then enters the second airtight chamber 17 of the heating device. The second airtight chamber 17 stores high-temperature inert gas. The electromagnetic induction controller 14 controls the electromagnetic induction coil 13 to generate an alternating current magnetic field. The magnetic tube 12 located in the alternating current magnetic field generates eddy currents due to electromagnetic induction and generates heat. The high-temperature inert gas flowing out of the second airtight chamber 17 flows through the magnetic tube 12 and is heated into ultra-high temperature inert gas. The ultra-high temperature inert gas is stored in the first airtight chamber 10 and then flows into the manufacturing device from the first airtight chamber 10 to continuously heat the thin-walled shell. The high temperature inert gas and the ultra-high temperature inert gas between the liquid runner 5, the reflux cavity 11, the reflux pipe 15, the second airtight cavity 17, the magnetic tube 12, the first airtight cavity 10 and the liquid runner 5 are alternately ventilated until the manufacturing device is transported to the vacuum shell furnace, the electromagnetic induction controller 14 controls the heating device to stop working, and the heating device is taken out from the liquid cup 1. Compared with the preheating temperature of the thin-walled shell ≥450°C in step 2, the heating device increases the preheating temperature of the thin-walled shell to above 600°C.

[0052] Please continue reading Figure 2 and Figure 3 Furthermore, first, the support seat 8 avoids the air outlet of the manufacturing device, and an inert gas storage tank is installed on the support seat 8. The inert gas storage tank is connected to the air outlet, so that the inert gas inside the inert gas storage tank flows through the liquid runner 5, and the air is heated by the liquid runner 5 to become a high-temperature inert gas. When the second airtight cavity 17 stores the preset high-temperature inert gas, the inert gas storage tank stops supplying the inert gas to the air outlet. After the thin-walled shell is heated by the heating equipment, the inert gas in the first airtight cavity 10, the magnetic tube 12, the second airtight cavity 17, the thin-walled shell and the liquid runner 5 are pumped into the inert gas storage tank for next use. Furthermore, the outer peripheral wall of the magnetic tube 12 is wrapped with an insulating and heat-insulating layer, and the insulating and heat-insulating layer blocks the heat energy generated by the heating device in the magnetic tube 12, which can prevent heat loss and keep the electromagnetic induction coil 13 at a normal temperature, thereby extending the service life of the heating equipment.

[0053] In the above manufacturing method, preferably step three also includes: the metal liquid fills the liquid cup with a certain diameter, the metal liquid is diverted through the liquid runner, the liquid runner guides the metal liquid to the thin-walled shell, and the metal liquid in the thin-walled shell forms an ultra-thin part in a vacuum shell solidification furnace.

[0054] The thin-walled mold shell of the embodiment of the present invention is loaded into a roasting furnace together with a heat preservation box for preheating and then quickly transferred to a vacuum consumable electrode melting furnace for pouring. The thin-walled mold shell has a relatively high temperature, which can significantly reduce its chilling effect, increase the fluidity of the molten metal, avoid premature solidification of the ultra-thin parts during pouring, and improve the filling ability of the molten metal.

[0055] The manufacturing device in the second step of the embodiment of the present invention is loaded into a roasting furnace for preheating. The ultra-thin part mold shell made of graphite material in the thin-walled mold shell is preheated to 700 - 800 °C, and the ultra-thin part mold shell made of ordinary material in the thin-walled mold shell is preheated to 200 - 300 °C.

[0056] Please refer to Figure 2 , the manufacturing device in the first step of the embodiment of the present invention includes a heat preservation box filled with heat preservation materials, at least one thin-walled mold shell buried between the heat preservation materials, and a liquid pouring channel 5 communicating the thin-walled mold shell and the outside of the heat preservation box. The heat preservation box is alternately placed in a roasting furnace or a vacuum consumable electrode melting furnace; the thin-walled mold shell is located in the middle of the heat preservation box in the height direction; the liquid pouring channel 5 is located at the upper part of the heat preservation box and is communicated with each thin-walled mold shell.

[0057] The heat preservation box of the embodiment of the present invention has a heat preservation function. The thin-walled mold shell is loaded into a roasting furnace together with the heat preservation box for preheating and then quickly transferred to a vacuum consumable electrode melting furnace for pouring. The thin-walled mold shell has a relatively high temperature, which can significantly reduce its chilling effect, increase the fluidity of the molten metal, avoid premature solidification of the ultra-thin parts during pouring, and improve the filling ability of the molten metal.

[0058] Please continue to refer to Figure 2 , preferably, the thin-walled mold shell includes at least one ultra-thin part mold shell 7 made of graphite material and at least one ultra-thin part mold shell 6 made of ordinary material; both the ultra-thin part mold shell 7 made of graphite material and the ultra-thin part mold shell 6 made of ordinary material are communicated with the liquid pouring channel 5; the ultra-thin part mold shell 7 made of graphite material is buried in the middle of the heat preservation box in the length direction, and the ultra-thin part mold shell 6 made of ordinary material is buried on the side of the heat preservation box in the length direction.

[0059] In the embodiment of the present invention, the ultra-thin part mold shell 7 made of graphite material is placed in the middle of the heat preservation box in the length direction, and the ultra-thin part mold shell 6 made of ordinary material is located on both sides of the ultra-thin part mold shell 7 made of graphite material. The thin-walled mold shell together with the heat preservation box is placed in a roasting furnace. Most of the heat heats the ultra-thin part mold shell 7 made of graphite material and the ultra-thin part mold shell 6 made of ordinary material from the liquid pouring channel 5, and a small part of the heat heats the ultra-thin part mold shell 7 made of graphite material and the ultra-thin part mold shell 6 made of ordinary material from the box body of the heat preservation box through the heat preservation materials. In this way, the temperature of the ultra-thin part mold shell 7 made of graphite material is higher than that of the ultra-thin part mold shell 6 made of ordinary material, which is more conducive to reducing the chilling effect of the ultra-thin part mold shell 7 made of graphite material.

[0060] Please continue to refer to Figure 2, preferably, the diameter of the liquid runner 5 connecting to the ultra-thin part shell 7 made of graphite material > the diameter of the liquid runner 5 connecting to the ultra-thin part shell 6 made of ordinary material. In the embodiment of the present invention, making the diameter of the liquid runner 5 connecting to the graphite shell larger than that of the ordinary shell is mainly to heat the ultra-thin part shell 7 made of graphite material, so that the temperature of the ultra-thin part shell 7 made of graphite material is higher than that of the ultra-thin part shell 6 made of ordinary material.

[0061] Please continue to refer to Figure 2 , preferably, the heat-insulating material in the box body 2 of the heat-insulating box includes: heat-insulating sand 4 for burying the thin-walled shell, and heat-insulating cotton 3 arranged to surround the heat-insulating sand 4; the heat-insulating cotton 3 is in contact with the inner wall of the box body 2; the liquid runner 5 is buried in the heat-insulating sand 4; both the box body 2 and the heat-insulating cotton 3 are provided with channel openings, and the channel openings communicate with the inlet of the liquid runner 5.

[0062] In the embodiment of the present invention, the thin-walled shell is buried in the heat-insulating material, and the heat-insulating material has a two-layer structure. The outer-layer heat-insulating material is made of silicon, aluminum, calcium, zirconium and other composite refractory cotton, and the thickness of the refractory cotton needs to be ≥ 50 mm; the inner-layer heat-insulating material is made of silicon, aluminum, calcium, zirconium and other composite refractory sand for precision investment casting of die shells, or waste sand of precision casting die shells with a mesh size greater than 100, and the internal heat-insulating material needs to be tightly filled in the cavity part of the casting mold.

[0063] Please continue to refer to Figure 2 , the manufacturing device of the embodiment of the present invention, in addition to including a heat-insulating box filled with heat-insulating material, at least one thin-walled shell buried between the heat-insulating materials, and a liquid runner 5 communicating the thin-walled shell and the outside of the heat-insulating box, further includes: a liquid cup 1 arranged at the inlet of the liquid runner 5, and the liquid cup 1 penetrates through the top wall of the heat-insulating box and is connected to the inlet of the liquid runner 5.

[0064] The purpose of setting the liquid cup 1 in the embodiment of the present invention is, on the one hand, to facilitate the pouring of molten metal, and on the other hand, to increase the heating speed of the thin-walled shell in the roasting furnace.

[0065] It should be noted that the ultra-thin part shell 6 made of ordinary material in the embodiment of the present invention refers to that the ultra-thin part shell 6 is made of coated sand, quartz powder, refractory material, binder, etc.

[0066] The embodiments of the present invention can effectively prevent titanium and zirconium materials from being unable to fill thin-walled castings during mold filling, ensuring the successful casting of thin-walled titanium and zirconium castings during gravity casting. When the embodiments of the present invention perform vacuum casting of thin-walled titanium and zirconium castings, the manufacturing device is assembled and loaded into a roasting furnace for preheating. The preheating temperature is ≥450°C. Preferably, the preheating temperature of the ultra-thin part shell 7 made of graphite material is 700 - 800°C, and the preheating temperature of the ultra-thin part shell 6 made of ordinary material is 200 - 300°C. After preheating, the manufacturing device is quickly moved into a vacuum consumable electrode melting furnace for casting. The molten metal fills the pouring cup 1 with a certain diameter. The molten metal is split by the liquid runner 5 and diverted to the ultra-thin part shell 6 made of ordinary material and the ultra-thin part shell 7 made of graphite material. Since the box body 2 has a double-layer heat insulation of heat-insulating cotton 3 and heat-insulating sand 4, at this time, the ultra-thin part shell 6 made of ordinary material and the ultra-thin part shell 7 made of graphite material have a relatively high temperature, significantly reducing the chilling effect of the graphite mold, reducing the viscosity of the molten metal, increasing the fluidity of the molten metal, avoiding premature cooling and solidification of the ultra-thin parts, improving the flow and mold filling ability of the molten metal, and significantly reducing the probability of defects such as misruns and lack of flesh during casting. The double-layer heat insulation method adopted by the embodiments of the present invention can enable a large amount of inert gas released by the mold at high temperature to escape smoothly, ensure that the ultra-thin part shell 7 made of graphite material is preheated at high temperature without being oxidized, and avoid tiny sand grains in the heat-insulating box from being sucked into the vacuum pump by the vacuum system of the vacuum consumable electrode melting furnace and damaging the pump equipment. It can effectively achieve the successful forming of ultra-thin-walled titanium and zirconium parts during gravity casting, ensuring that the ultra-thin parts have high internal and external quality.

[0067] In the embodiments of the present invention, the ultra-thin part shell made of ordinary material and the ultra-thin part shell made of graphite material are buried in heat-insulating materials. The heat-insulating materials are divided into two-layer structures. The outer-layer heat-insulating materials can adopt silicon, aluminum, calcium, zirconium-based and other composite refractory cotton, and the thickness of the refractory cotton is ≥50mm; the inner-layer heat-insulating materials adopt silicon, aluminum, calcium, zirconium-based and other composite refractory sands for investment casting, and recycled sands for investment casting with a mesh size greater than 100 can be used. The internal heat-insulating materials are tightly filled in the cavity parts of the mold. In the embodiments of the present invention, heat-insulating materials are arranged on the top of the box body, and the heat-insulating materials can adopt silicon, aluminum, calcium, zirconium-based and other composite refractory cotton.

[0068] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation manners or changes made without departing from the technical spirit of the present invention should be included within the protection scope of the present invention.

[0069] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0070] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for manufacturing an ultra-thin part, characterized in that, Including: Step 1: Assemble an incubator, a thin-walled shell mold, and a liquid runner into a manufacturing device; The diameter of the opening of the liquid runner connected to the ultra-thin part shell mold made of graphite material in the liquid runner > the diameter of the opening of the liquid runner connected to the ultra-thin part shell mold made of ordinary material; Step 2: Load the manufacturing device into a roasting furnace for preheating until the preheating temperature of the thin-walled shell mold ≥ 450°C; The thin-walled shell mold includes at least one ultra-thin part shell mold made of graphite material and at least one ultra-thin part shell mold made of ordinary material; Both the ultra-thin part shell mold made of graphite material and the ultra-thin part shell mold made of ordinary material are connected to the liquid runner; The ultra-thin part shell mold made of graphite material is buried in the middle of the incubator in the length direction, and the ultra-thin part shell mold made of ordinary material is buried in the side part of the incubator in the length direction; The heat-insulating material in the box body of the incubator includes: heat-insulating sand for burying the thin-walled shell mold, and heat-insulating cotton arranged to surround the heat-insulating sand; The heat-insulating cotton is in contact with the inner wall of the box body; The liquid runner is buried in the heat-insulating sand; Both the box body and the heat-insulating cotton are provided with passage openings, and the passage openings are connected to the inlet of the liquid runner; Step 3: Quickly move the manufacturing device into a vacuum consumable electrode melting furnace to pour molten metal; Between Step 2 and Step 3, there is also included: After the manufacturing device is removed from the roasting furnace, insert a heating device into the liquid cup of the manufacturing device to heat the thin-walled shell mold again until the heating device is removed when the manufacturing device is transported to the vacuum consumable electrode melting furnace, and then move the manufacturing device into the vacuum consumable electrode melting furnace.

2. The manufacturing method of an ultra-thin part according to claim 1, wherein Step 3 also includes: The molten metal fills the liquid cup with a certain diameter, the molten metal is divided by the liquid runner, the liquid runner guides the molten metal to the thin-walled shell mold, and the molten metal in the thin-walled shell mold forms an ultra-thin part in the vacuum consumable electrode melting furnace.

3. A method for manufacturing an ultra-thin part according to claim 1, characterized in that, The manufacturing device in Step 1 includes: An incubator filled with heat-insulating material, and the incubator is alternately placed in a roasting furnace or a vacuum consumable electrode melting furnace.

4. The method for manufacturing an ultra-thin part according to claim 3, wherein, The manufacturing device in Step 1 also includes: A liquid cup arranged at the inlet of the liquid runner, and the liquid cup penetrates the top wall of the incubator and is connected to the inlet of the liquid runner.

5. A method for manufacturing an ultra-thin part according to claim 1, characterized in that, When the manufacturing device in Step 2 is loaded into the roasting furnace for preheating, the ultra-thin part shell mold made of graphite material in the thin-walled shell mold is preheated to 700 - 800°C.

6. A method for manufacturing an ultra-thin part according to claim 1, characterized in that, After the manufacturing device is removed from the roasting furnace, the user holds a gripping part and inserts a heating device into the liquid cup of the manufacturing device; Start the heating device, the air outside the manufacturing device flows through the air outlet hole, liquid runner, return cavity, and return pipe of the manufacturing device in sequence and then enters the second airtight cavity of the heating device. The second airtight cavity stores high-temperature inert gas. The electromagnetic induction controller controls the electromagnetic induction coil to energize and generate an alternating current magnetic field. The magnetic conduction tube located in the alternating current magnetic field generates eddy currents due to electromagnetic induction and heats up. The high-temperature inert gas flowing out of the second airtight cavity flows through the magnetic conduction tube and is heated into ultra-high-temperature inert gas. The ultra-high-temperature inert gas is stored in the first airtight cavity and then flows into the manufacturing device from the first airtight cavity to continuously heat the thin-walled shell mold; The high-temperature inert gas and ultra-high-temperature inert gas alternate between the liquid runner, return cavity, return pipe, second airtight cavity, magnetic conduction tube, first airtight cavity, and liquid runner until the electromagnetic induction controller controls the heating device to stop working when the manufacturing device is transported to the vacuum consumable electrode melting furnace, and then take out the heating device from the liquid cup.

Images