Method for wax pattern regulation to adapt to different superalloy precision casting
By cooling the cold wax core to a suitable alloy shrinkage rate and using the same mold to manufacture wax models, the problem of mold diversity in high-temperature alloy casting is solved, achieving efficient performance verification and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SUZHOU GAOJING NEW MATERIAL TECH CO LTD
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-21
AI Technical Summary
Different high-temperature alloys have different shrinkage rates, resulting in large differences in the size of castings after casting in the same mold. This requires designing multiple molds for performance verification, which prolongs the verification time and costs.
By cooling the cold wax core, the important dimensions of its non-machined areas shrink to match the shrinkage rate of the alloy to be cast. The same mold is used to manufacture the wax model, and the cooling time is precisely controlled by combining the shrinkage curve of the cold wax core.
It shortened the performance verification time of castings, reduced verification costs, enabled castings of different high-temperature alloys to reach the design dimensions, and avoided the need for multiple mold designs.
Smart Images
Figure CN122425160A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of wax pattern manufacturing methods, and in particular to a method for adjusting wax patterns to adapt to the precision casting of different high-temperature alloys. Background Technology
[0002] In the design process of high-temperature alloy castings, different alloys need to be used for casting and performance verification to select the alloy with better performance as the casting raw material. Because different alloys have different shrinkage rates, the dimensions of castings obtained from different alloys after wax pressing, shell making, dewaxing, and pouring processes in the same mold can vary significantly. Therefore, different molds need to be designed for different alloys, resulting in longer casting times for different alloys, and consequently, longer performance verification times for the castings. Summary of the Invention
[0003] Therefore, the technical problem to be solved by the present invention is to provide a method for adjusting the wax pattern to adapt to the precision casting of different high-temperature alloys, which can shorten the performance verification time of the casting.
[0004] To solve the above-mentioned technical problems, the present invention provides a method for adjusting the wax pattern to adapt to the precision casting of different high-temperature alloys, comprising the following steps: Step S1: Injecting wax into a first mold, the wax forms a cold wax core in the first mold; Step S2: Removing the cold wax core from the first mold and cooling the cold wax core until the dimensions of important non-machined positions of the cold wax core shrink to a size that matches the shrinkage rate of the alloy to be cast; Step S3: Placing the cold wax core in a second mold and injecting wax into the second mold, forming a wax pattern in the second mold; Step S4: Removing the wax pattern from the second mold and cooling the wax pattern.
[0005] In one embodiment of the present invention, in step S2, the dimensions of the important positions of the cold wax core, the important positions of the wax model, and the important positions of the completed casting are all defined to correspond to the same position. The dimensions of the important positions of the first mold are the dimensions of the first mold corresponding to the important positions of the cold wax core, and the dimensions of the important positions of the second mold are the dimensions of the second mold corresponding to the important positions of the wax model.
[0006] The shrinkage amount of the important position of the cold wax core is: maximum shrinkage amount of the cold wax core - [(size of the important position of the second mold / size of the important position of the finished casting - alloy shrinkage rate) × size of the important position of the finished casting - (size of the important position of the second mold - size of the important position of the first mold) × 2 × maximum shrinkage rate of the wax material]. The required cooling time of the cold wax core is determined based on the shrinkage amount of the important position of the cold wax core.
[0007] In one embodiment of the present invention, step S2 further includes a measurement step. After the cold wax core is removed from the first mold, the outer contour dimension of the cold wax core is measured multiple times, and the time interval between two adjacent measurements is the same, until the cold wax core cools down and no longer shrinks. At this time, the shrinkage amount of the cold wax core is the maximum shrinkage amount. The cold wax core shrinkage curve is plotted based on the measurement results of the outer contour dimension. After performing step S1 again, the shrinkage amount of the dimensions of important positions of the cold wax core is correlated with the cold wax core shrinkage curve to obtain the cooling time of the cold wax core.
[0008] In one embodiment of the present invention, the size of the important position of the second mold / the size of the important position of the completed casting is greater than or equal to the shrinkage rate of the alloy with the largest shrinkage rate among various alloys + (size of the important position of the second mold - size of the important position of the first mold) × 2 × maximum shrinkage rate of wax / size of the important position of the completed casting.
[0009] In one embodiment of the present invention, the size of the important position of the second mold / the size of the important position of the completed casting is less than or equal to the shrinkage rate of the alloy with the smallest shrinkage rate among various alloys + [(size of the important position of the second mold - size of the important position of the first mold) × 2 × maximum shrinkage rate of wax + maximum shrinkage of cold wax core] / size of the important position of the completed casting.
[0010] In one embodiment of the present invention, the wax material injected into the first mold in step S1 is the same as the wax material injected into the second mold in step S3.
[0011] In one embodiment of the present invention, the maximum shrinkage rate of the wax is 0.6%-1.5%.
[0012] In one embodiment of the present invention, in steps S1 and S3, the temperature of the wax material injected into the first mold and the second mold is 55°C-65°C.
[0013] In one embodiment of the present invention, in step S2, the temperature of the cold wax core when it is removed from the first mold is 30°C-40°C.
[0014] In one embodiment of the present invention, the difference between the dimension of the important position of the second mold and the dimension of the important position of the first mold is 5mm-10mm.
[0015] The technical solution of the present invention has the following advantages compared with the prior art:
[0016] The present invention describes a method for adjusting wax patterns to adapt to the precision casting of different high-temperature alloys. Based on the shrinkage of the dimensions of important positions of the cold wax core and the shrinkage rate range of the important positions of the mold, combined with the shrinkage curve of the cold wax core, the specific cooling time of the cold wax core can be determined. This allows the dimensions of important positions in the non-machined areas of the cold wax core to shrink to a size that matches the shrinkage rate of the alloy to be cast. Thus, using the same mold to manufacture wax patterns can also enable alloy castings of different types of alloys to achieve the design dimensions, avoiding the need to manufacture multiple molds for different types of alloys. This shortens the performance verification time of the castings and also reduces the performance verification cost of the castings. Attached Figure Description
[0017] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0018] Figure 1 This is a flowchart of a method for adjusting wax patterns to adapt to the precision casting of different high-temperature alloys according to the present invention;
[0019] Figure 2 This is a structural diagram of the turbine disk cold wax core;
[0020] Figure 3 This is a structural diagram of the cold wax core of the high-temperature alloy transition head;
[0021] Figure 4 This is the shrinkage curve of the cold wax core in Example 1;
[0022] Figure 5 This is the shrinkage curve of the cold wax core in Example 2.
[0023] Explanation of the markings on the attached diagrams: 1. Turbine disk cold wax core; 2. High-temperature alloy transition head cold wax core; 21. Support column. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.
[0025] Reference Figure 1As shown, the present invention provides a method for adjusting a wax pattern to adapt to the precision casting of different high-temperature alloys, comprising the following steps: Step S1: Injecting wax into a first mold, the wax forms a cold wax core within the first mold; Step S2: Removing the cold wax core from the first mold and cooling the cold wax core until the dimensions of important non-machined locations of the cold wax core shrink to a size that matches the shrinkage rate of the alloy to be cast; Step S3: Placing the cold wax core in a second mold and injecting wax into the second mold, forming a wax pattern within the second mold; Step S4: Removing the wax pattern from the second mold and cooling the wax pattern.
[0026] This embodiment describes a method for adjusting wax patterns to adapt to the precision casting of different high-temperature alloys. By cooling the cold wax core for a certain period of time, the dimensions of important non-machined positions of the cold wax core shrink to a size that matches the shrinkage rate of the alloy to be cast. This allows the use of the same mold to manufacture wax patterns, enabling alloy castings of different types of alloys to achieve the design dimensions. This avoids the need to manufacture multiple molds for different types of alloys, thereby shortening the performance verification time of the castings and reducing the performance verification cost of the castings.
[0027] Step S1 involves injecting wax into the first mold, where it forms a cold wax core. Specifically, the temperature at which the wax is injected into the first mold is 55°C-65°C, preferably 60°C. The maximum shrinkage rate of the wax is typically 0.6%-1.5%, preferably 1%.
[0028] Step S2 involves removing the cold wax core from the first mold and cooling it until the dimensions of critical non-machined areas of the cold wax core shrink to a size that matches the shrinkage rate of the alloy to be cast. Specifically, the non-machined areas of the cold wax core refer to the positions that do not require machining after the cold wax core is removed from the first mold and before being placed in the second mold. Critical non-machined areas of the cold wax core refer to positions that are important for support, functionality, etc., for example... Figure 2 Taking the turbine disk cold wax core 1 shown as an example, since the blade body and flow channel surface of the turbine disk are non-machined areas, while the hub and blade tip are machined areas, and the size of a single blade body is relatively small, the shrinkage rate of the wax material has a small impact on a single blade body. Therefore, the diameter of the flow channel surface is used as the dimension for completing the important parts of the casting; for example, taking Figure 3Taking the high-temperature alloy transition head cold wax core 2 as an example, the support column 21 in the middle of the high-temperature alloy transition head is the main load-bearing position. To ensure surface grain refinement and thus performance strength, machining is generally not allowed. Therefore, the diameter of the support column 21 is used as the dimension of the important position of the casting. Step S2 also includes a measurement step. The temperature of the cold wax core when it is removed from the first mold is 30℃-40℃. After the cold wax core is removed from the first mold, it is placed in an ambient temperature of 19℃-23℃ for cooling. The outer contour dimension of the cold wax core is measured during the cooling process. Taking the disc-shaped part as an example, the outer contour dimension refers to the radial dimension. The time interval between two adjacent measurements is the same until the cold wax core no longer shrinks. In this embodiment, 16 hours of wax material cooling is considered as the complete shrinkage state. After the cold wax core has been cooled for 16 hours, the shrinkage amount of the cold wax core is the maximum shrinkage amount. The cold wax core shrinkage curve is plotted based on the measurement results of the outer contour dimension. Then, step S1 is performed again, that is, the cold wax core is remade.
[0029] In step S2, the dimensions of the critical positions of the cold wax core, the wax pattern, and the completed casting are defined to correspond to the same location. The dimension of the completed casting's critical position can be considered as the design dimension of the casting's critical position. The dimension of the first mold's critical position is the dimension corresponding to the critical position of the cold wax core, and the dimension of the second mold's critical position is the dimension corresponding to the critical position of the wax pattern. The shrinkage amount of the critical position dimensions of the cold wax core is: maximum shrinkage amount of the cold wax core - [(dimension of the second mold's critical position / dimension of the completed casting's critical position - alloy shrinkage rate) × dimension of the completed casting's critical position - (dimension of the second mold's critical position - dimension of the first mold's critical position) × 2 × maximum shrinkage rate of the wax material]. Specifically, the dimension of the second mold's critical position / the dimension of the completed casting's critical position can be considered as the shrinkage rate of the mold's critical position, and the dimension of the second mold's critical position minus the dimension of the first mold's critical position can be considered as the wall thickness of the wax pattern's critical position. The difference between the dimensions of the second mold's critical position and the first mold's critical position is 5mm-10mm. The required cooling time for the cold wax core is determined based on the shrinkage amount of the critical position dimensions of the cold wax core. Specifically, the cooling time of the cold wax core is determined by correlating the shrinkage of the dimensions of critical locations with the cold wax core shrinkage curve, thus making the cooling time of the cold wax core more accurate. After cooling the cold wax core for the corresponding time, the dimensions of critical locations in the non-machined areas of the cold wax core shrink to a size that matches the shrinkage rate of the alloy to be cast.
[0030] Before manufacturing the wax model, the dimensions of the critical positions in the second mold / the finished casting critical positions must meet the following requirements: The shrinkage rate of the alloy with the highest shrinkage rate among various alloys + (Dimension of the critical position in the second mold - Dimension of the critical position in the first mold) × 2 × Maximum shrinkage rate of the wax material / Dimension of the finished casting critical position. Simultaneously, the dimensions of the critical positions in the second mold / the finished casting critical positions must meet the following requirement: The shrinkage rate of the alloy with the lowest shrinkage rate among various alloys + [(Dimension of the critical position in the second mold - Dimension of the critical position in the first mold) × 2 × Maximum shrinkage rate of the wax material + Maximum shrinkage of the cold wax core] / Dimension of the finished casting critical position. When the dimensions of the critical positions in the second mold / the finished casting critical positions cannot meet the above requirements, i.e., the wall thickness of the critical positions in the wax model cannot meet the above requirements, a wax material with a higher maximum shrinkage rate can be selected for manufacturing the cold wax core and wax model.
[0031] Step S3 involves placing the cold wax core into the second mold and injecting wax into the second mold, forming a wax mold inside the second mold. Specifically, the temperature at which the wax is injected into the second mold is 55℃-65℃, preferably 60℃. The wax injected into the first mold in step S1 is the same as the wax injected into the second mold in step S3, meaning that the wax used in steps S1 and S3 is the same type of wax.
[0032] Step S4 involves removing the wax model from the second mold and cooling it. In this embodiment, the wax model is cooled for 16 hours in an environment of 19℃-23℃. The wax model is then processed through shell making, dewaxing, and casting to obtain a casting of the corresponding size.
[0033] Example 1:
[0034] Taking a turbine disk as an example for wax model manufacturing, since the blade body and flow channel surface of the turbine disk are non-machined positions, while the hub and blade tip are machined positions, the size of a single blade body is relatively small, and the shrinkage rate of the wax material has little impact on a single blade body. Therefore, the diameter of the flow channel surface is used as the size of the important position of the casting. According to the design requirements, the size of the important position of the casting is 140.5mm.
[0035] The turbine disk casting requires the use of two alloys, K417G and K447A, for casting. K417G has a shrinkage rate of 1.7%, while K447A has a shrinkage rate of 2%.
[0036] The difference between the dimensions of the important positions in the second mold and those in the first mold is 6mm, meaning the wax mold wall thickness is 6mm. A wax material with a maximum shrinkage rate of 1% is selected to manufacture the cold wax core and wax mold.
[0037] Step S1: Inject the wax material into the first mold. The wax material forms a cold wax core inside the first mold. The structure of the turbine disk cold wax core 1 is as follows: Figure 2 As shown.
[0038] Step S2: After removing the cold wax core from the first mold, place it in an environment with a temperature of 19℃-23℃ for cooling. During the cooling process, measure the radial dimension of the cold wax core. Continue cooling for 16 hours, and plot the shrinkage curve of the cold wax core based on the radial dimension measurement results. The shrinkage curve of the cold wax core is shown below. Figure 4 As shown, the maximum shrinkage of the cold wax core is 0.57 mm. Then, step S1 is performed again.
[0039] Since the shrinkage rate of K417G is less than that of K447A, the shrinkage rate of the important position of the mold is greater than or equal to the shrinkage rate of K447A + (the size of the important position of the second mold - the size of the important position of the first mold) × 2 × the maximum shrinkage rate of the wax material / the size of the important position of the finished casting. Specifically, the shrinkage rate of the important position of the mold is greater than or equal to 2% + 6 * 2 * 1% / 140.5 = 2.09%. The shrinkage rate of the important position of the mold is less than or equal to the shrinkage rate of K417G + [(the size of the important position of the second mold - the size of the important position of the first mold) × 2 × the maximum shrinkage rate of the wax material + the maximum shrinkage of the cold wax core] / the size of the important position of the finished casting. Specifically, the shrinkage rate of the important position of the mold is less than or equal to 1.7% + (6 * 2 * 1% + 0.57) / 140.5 = 2.19%. Therefore, the shrinkage rate of the important position of the mold is between 2.09% and 2.19%, and we take the middle value of 2.15% as the shrinkage rate of the important position of the mold.
[0040] The shrinkage of the cold wax core for K447A alloy wax mold = maximum shrinkage of the cold wax core - [(dimension of the important position of the second mold / dimension of the important position of the completed casting - alloy shrinkage rate) × dimension of the important position of the completed casting - (dimension of the important position of the second mold - dimension of the important position of the first mold) × 2 × maximum shrinkage rate of wax] = 0.57 - [(2.15% - 2%) * 140.5 - 6 * 2 * 1%] = 0.479 mm. According to the shrinkage curve of the cold wax core, the cold wax core of the K447A alloy wax mold is placed in the second mold after the cold wax core has cooled for 260 minutes.
[0041] The shrinkage of the cold wax core for the K417G alloy wax pattern = maximum shrinkage of the cold wax core - [(dimension of the important position of the second mold / dimension of the important position of the completed casting - alloy shrinkage rate) × dimension of the important position of the completed casting - (dimension of the important position of the second mold - dimension of the important position of the first mold) × 2 × maximum shrinkage rate of wax] = 0.57 - [(2.15% - 1.7%) * 140.5 - 6 * 2 * 1%] = 0.058 mm. According to the shrinkage curve of the cold wax core, the cold wax core of the K417G alloy wax pattern is placed in the second mold after the cold wax core has cooled for 3 minutes.
[0042] Step S3: After the cold wax core has cooled for the corresponding time, place it in the second mold and inject wax into the second mold to form a wax mold.
[0043] Step S4: Remove the wax model from the second mold and allow it to cool. The wax model is then processed through shell making, dewaxing, and casting to obtain an alloy casting of corresponding dimensions.
[0044] Example 2:
[0045] Taking a turbine disk as an example for wax model manufacturing, since the blade body and flow channel surface of the turbine disk are non-machined positions, while the hub and blade tip are machined positions, the size of a single blade body is relatively small, and the shrinkage rate of the wax material has little impact on a single blade body. Therefore, the diameter of the flow channel surface is used as the size of the important position of the casting. According to the design requirements, the size of the important position of the casting is 140.5mm.
[0046] The turbine disk casting requires the use of three alloys: K438, K447A, and K465. K438 has a shrinkage rate of 1.8%, K447A has a shrinkage rate of 2%, and K465 has a shrinkage rate of 2.2%.
[0047] The difference between the dimensions of the important positions in the second mold and those in the first mold is 6mm, meaning the wax mold wall thickness is 6mm. A wax material with a maximum shrinkage rate of 1.2% is selected to manufacture the cold wax core and wax mold.
[0048] Step S1: Inject the wax into the first mold. The wax forms a cold wax core inside the first mold. The structure of the cold wax core is as follows: Figure 2 As shown.
[0049] Step S2: After removing the cold wax core from the first mold, place it in an environment with a temperature of 19℃-23℃ for cooling. During the cooling process, measure the radial dimension of the cold wax core. Continue cooling for 16 hours, and plot the shrinkage curve of the cold wax core based on the radial dimension measurement results. The shrinkage curve of the cold wax core is shown below. Figure 5 As shown, the maximum shrinkage of the cold wax core is 0.68 mm. Then, step S1 is performed again.
[0050] Since K438 has the smallest shrinkage rate and K465 has the largest shrinkage rate, the shrinkage rate of the important position of the mold is greater than or equal to the shrinkage rate of K465 + (the size of the important position of the second mold - the size of the important position of the first mold) × 2 × the maximum shrinkage rate of the wax material / the size of the important position of the finished casting. Specifically, the shrinkage rate of the important position of the mold is greater than or equal to 2.2% + 6 * 2 * 1.2% / 140.5 = 2.30%. The shrinkage rate of the important position of the mold is less than or equal to the shrinkage rate of K438 + [(the size of the important position of the second mold - the size of the important position of the first mold) × 2 × the maximum shrinkage rate of the wax material + the maximum shrinkage of the cold wax core] / the size of the important position of the finished casting. Specifically, the shrinkage rate of the important position of the mold is less than or equal to 1.8% + (6 * 2 * 1.2% + 0.68) / 140.5 = 2.37%. Therefore, the shrinkage rate of the important position of the mold is between 2.30% and 2.37%. Here, we take the middle value of 2.35% as the shrinkage rate of the important position of the mold.
[0051] The shrinkage of the cold wax core for K438 alloy wax mold = maximum shrinkage of the cold wax core - [(dimension of the important position of the second mold / dimension of the important position of the completed casting - alloy shrinkage rate) × dimension of the important position of the completed casting - (dimension of the important position of the second mold - dimension of the important position of the first mold) × 2 × maximum shrinkage rate of wax] = 0.68 - [(2.35% - 1.8%) * 140.5 - 6 * 2 * 1.2%] = 0.051 mm. According to the shrinkage curve of the cold wax core, the cold wax core of the K438 alloy wax mold is placed in the second mold after the cold wax core has cooled for 2 minutes.
[0052] The shrinkage of the cold wax core for K447A alloy wax mold = maximum shrinkage of the cold wax core - [(dimension of the important position of the second mold / dimension of the important position of the completed casting - alloy shrinkage rate) × dimension of the important position of the completed casting - (dimension of the important position of the second mold - dimension of the important position of the first mold) × 2 × maximum shrinkage rate of wax] = 0.68 - [(2.35% - 2%) * 140.5 - 6 * 2 * 1.2%] = 0.332 mm. According to the shrinkage curve of the cold wax core, the cold wax core of the K447A alloy wax mold is placed in the second mold after the cold wax core has cooled for 28 minutes.
[0053] The shrinkage of the cold wax core for K465 alloy wax pattern = maximum shrinkage of cold wax core - [(dimension of important position in the second mold / dimension of important position in the finished casting - alloy shrinkage rate) × dimension of important position in the finished casting - (dimension of important position in the second mold - dimension of important position in the first mold) × 2 × maximum shrinkage rate of wax] = 0.68 - [(2.35% - 2.2%) * 140.5 - 6 * 2 * 1.2%] = 0.613 mm. According to the shrinkage curve of cold wax core, the cold wax core for K465 alloy wax pattern is placed in the second mold after the cold wax core has cooled for 385 minutes.
[0054] Step S3: After the cold wax core has cooled for the corresponding time, place it in the second mold and inject wax into the second mold to form a wax mold.
[0055] Step S4: Remove the wax model from the second mold and allow it to cool. The wax model is then processed through shell making, dewaxing, and casting to obtain an alloy casting of corresponding dimensions.
[0056] This invention discloses a method for adjusting wax patterns to adapt to the precision casting of different high-temperature alloys. Based on the shrinkage of the dimensions of important positions of the cold wax core and the shrinkage rate range of the important positions of the mold, combined with the shrinkage curve of the cold wax core, the specific cooling time of the cold wax core can be determined. This allows the dimensions of important positions in the non-machined areas of the cold wax core to shrink to a size that matches the shrinkage rate of the alloy to be cast. Thus, using the same mold to manufacture wax patterns can also enable alloy castings of different types of alloys to achieve the design dimensions, avoiding the need to manufacture multiple molds for different types of alloys. This shortens the performance verification time of the castings and also reduces the performance verification cost of the castings.
[0057] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.
Claims
1. A method for adjusting wax patterns to adapt to the precision casting of different high-temperature alloys, characterized in that, Includes the following steps: Step S1: Inject the wax into the first mold, and the wax forms a cold wax core inside the first mold; Step S2: Remove the cold wax core from the first mold and cool it until the dimensions of the important non-machined parts of the cold wax core shrink to a size that matches the shrinkage rate of the alloy to be cast. Step S3: Place the cold wax core into the second mold, and inject wax into the second mold to form a wax mold. Step S4: Remove the wax model from the second mold and allow it to cool.
2. The method for adjusting the wax pattern according to claim 1 to adapt to the precision casting of different high-temperature alloys, characterized in that: In step S2, the dimensions of the important positions of the cold wax core, the important positions of the wax model, and the important positions of the completed casting are all defined to correspond to the same position. The dimensions of the important positions of the first mold are the dimensions of the first mold corresponding to the important positions of the cold wax core, and the dimensions of the important positions of the second mold are the dimensions of the second mold corresponding to the important positions of the wax model. The shrinkage amount of the important position of the cold wax core is: maximum shrinkage amount of the cold wax core - [(size of the important position of the second mold / size of the important position of the finished casting - alloy shrinkage rate) × size of the important position of the finished casting - (size of the important position of the second mold - size of the important position of the first mold) × 2 × maximum shrinkage rate of the wax material]. The required cooling time of the cold wax core is determined based on the shrinkage amount of the important position of the cold wax core.
3. The method for adjusting the wax pattern according to claim 2 to adapt to the precision casting of different high-temperature alloys, characterized in that: Step S2 also includes a measurement step. After the cold wax core is removed from the first mold, the outer contour dimensions of the cold wax core are measured multiple times, and the time interval between two adjacent measurements is the same, until the cold wax core cools down and no longer shrinks. At this time, the shrinkage amount of the cold wax core is the maximum shrinkage amount. The cold wax core shrinkage curve is plotted based on the measurement results of the outer contour dimensions. After performing step S1 again, the shrinkage amount of the dimensions of important positions of the cold wax core is correlated with the cold wax core shrinkage curve to obtain the cooling time of the cold wax core.
4. The method for adjusting the wax pattern according to claim 2 to adapt to the precision casting of different high-temperature alloys, characterized in that: The dimension of the important position of the second mold / the dimension of the important position of the completed casting is greater than or equal to the shrinkage rate of the alloy with the largest shrinkage rate among various alloys + (the dimension of the important position of the second mold - the dimension of the important position of the first mold) × 2 × the maximum shrinkage rate of the wax material / the dimension of the important position of the completed casting.
5. The method for adjusting the wax pattern according to claim 2 to adapt to the precision casting of different high-temperature alloys, characterized in that: The dimension of the important position of the second mold / the dimension of the important position of the completed casting is less than or equal to the shrinkage rate of the alloy with the smallest shrinkage rate among various alloys + [(the dimension of the important position of the second mold - the dimension of the important position of the first mold) × 2 × the maximum shrinkage rate of the wax material + the maximum shrinkage amount of the cold wax core] / the dimension of the important position of the completed casting.
6. The method for adjusting the wax pattern according to claim 1 to adapt to the precision casting of different high-temperature alloys, characterized in that: The wax material injected into the first mold in step S1 is the same as the wax material injected into the second mold in step S3.
7. The method for adjusting the wax pattern according to claim 6 to adapt to the precision casting of different high-temperature alloys, characterized in that: The maximum shrinkage rate of the wax is 0.6%-1.5%.
8. The method for adjusting the wax pattern according to claim 1 to adapt to the precision casting of different high-temperature alloys, characterized in that: In steps S1 and S3, the temperature of the wax material injected into the first mold and the second mold is 55℃-65℃.
9. The method for adjusting the wax pattern according to claim 1 to adapt to the precision casting of different high-temperature alloys, characterized in that: In step S2, the temperature of the cold wax core when it is removed from the first mold is 30℃-40℃.
10. The method for adjusting the wax pattern according to claim 2 to adapt to the precision casting of different high-temperature alloys, characterized in that: The difference between the dimensions of the important positions of the second mold and the important positions of the first mold is 5mm-10mm.