A casting mold for testing mold interface temperature, a method for testing mold interface temperature, and a method for determining casting process parameters.

Abstract

This invention discloses a casting mold, a method for testing the temperature of the mold interface, and a method for determining casting process parameters. The casting mold includes a mold body and a temperature measuring structure. The temperature measuring structure includes a temperature measuring hole, a temperature measuring element, and a positioning block inside the temperature measuring hole, all located within the mold body. The temperature measuring hole is a blind hole, with the bottom area forming a target temperature measuring area. One end of the temperature measuring element is a measuring end. The positioning block has a positioning hole through which the temperature measuring element passes, with the measuring end extending beyond the positioning block and into the target temperature measuring area. Multiple temperature measuring structures are spaced apart along a first direction, with each temperature measuring element extending perpendicular to the first direction. The measuring ends of each temperature measuring element in the multiple temperature measuring structures are located on the same straight line extending along the first direction, which is perpendicular to the mold interface to be tested. This casting mold can accurately position the temperature measuring element, enabling the acquisition of temperature values ​​at different distances from the mold interface at the same location during a single casting process.

Description

Technical Field

[0001] This invention relates to the field of casting technology, specifically to a casting mold for testing mold interface temperature, a method for testing mold interface temperature, and a method for determining casting process parameters. Background Technology

[0002] Casting, as a long-established forming technology, occupies an important position in the manufacturing industry. However, traditional casting techniques generally suffer from problems such as poor casting quality and high scrap rates, which are mainly related to low levels of casting process technology. Casting production often adopts a trial-and-error method. For the development of large castings or new products, repeated trials are often required, which not only results in long cycles and significant waste but also makes it difficult to guarantee product quality.

[0003] With the development of modern technology, especially the increasing maturity of computer technology, numerical simulation technology is gradually becoming the main tool for the design and optimization of hot working processes such as casting and heat treatment. Accurate and complete material thermal properties are essential known conditions for numerical simulation, especially the interfacial heat transfer coefficient between the casting and the mold. The accuracy of this parameter directly affects the reliability of the simulation results. However, the casting process is a complex phase change heat transfer process. Liquid metal gradually solidifies in the mold as the temperature decreases, and the casting shrinks during solidification. These complex factors not only make it difficult to obtain the interfacial heat transfer coefficient through theoretical analysis, but also make it difficult to measure the interfacial temperature without distorting the temperature field at the interface using current experimental methods. Therefore, the study of interfacial heat transfer in the casting process belongs to a typical inverse problem of heat conduction. For such inverse problems, the temperature field inside the melt and the mold is usually obtained experimentally, and then the boundary conditions of the object are solved by inverse calculation to obtain the interfacial heat transfer coefficient of the casting / mold. Therefore, achieving accurate measurement of the temperature at multiple characteristic points inside the mold is of great significance for calculating the interfacial heat transfer coefficient of the casting / mold.

[0004] In the existing technology, it is difficult to accurately position the temperature measuring end of the thermocouple during the actual operation of testing the internal temperature field of the mold, which makes it difficult to guarantee the reliability of the temperature measurement results. Summary of the Invention

[0005] The main technical problem solved by this invention is to provide a casting mold with a simple structure that can accurately test the temperature of the mold interface.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A casting mold for testing the interface temperature of a mold includes a mold body, and the casting mold further includes a temperature measuring structure for testing the internal temperature of the mold body, the temperature measuring structure comprising:

[0008] A temperature measuring hole is provided inside the mold body. The temperature measuring hole is a blind hole, and the bottom area of ​​the blind hole forms a temperature measuring target area.

[0009] The temperature sensing element has a temperature sensing end at one end and is used to connect to a data acquisition system located outside the mold body at the other end.

[0010] A positioning block is disposed inside the temperature measuring hole and cooperates with the temperature measuring hole. There is a gap between the end face of the positioning block facing the temperature measuring target area and the bottom surface of the temperature measuring hole. The positioning block is provided with a positioning hole that cooperates with the temperature measuring element. The temperature measuring element passes through the positioning hole, and the temperature measuring end extends out of the positioning block and into the temperature measuring target area.

[0011] The temperature measuring structures are arranged in multiple intervals along the first direction. The extension direction of the temperature measuring element in each temperature measuring structure is perpendicular to the first direction. The temperature measuring ends of the temperature measuring elements in the multiple temperature measuring structures are located on the same straight line extending along the first direction, which is perpendicular to the interface of the mold to be measured.

[0012] In some embodiments, the interval forms a filling space, and the temperature measuring structure further includes a filler that is filled in the filling space and is conductive. At room temperature, the filler is liquid and the viscosity of the filler is 1 mPa·s to 40000 mPa·s. The temperature measuring end extends into the filling space, and the filler fills the gap between the temperature measuring end and the temperature measuring target area.

[0013] In some embodiments, the temperature measuring end is located at the lower part of the packing space.

[0014] In some embodiments, the filler is one of gallium, gallium-indium alloy, gallium-indium-tin alloy, and gallium-indium-tin-zinc alloy.

[0015] In some embodiments, the temperature measuring structure further includes a limiting structure for limiting the position of the positioning block in the temperature measuring hole.

[0016] In some embodiments, the limiting structure is disposed on one of the mold body and the positioning block, and abuts against the other of the two.

[0017] In some embodiments, the temperature measuring hole includes a first hole and a second hole arranged in sequence, the cross-sectional size of the first hole is smaller than the cross-sectional size of the second hole, the limiting structure is an end face of the first hole facing the second hole, the positioning block is disposed in the second hole, the end face of the positioning block facing the temperature measuring target area abuts against the end face of the first hole facing the second hole, and the temperature measuring end of the temperature measuring element is located in the first hole.

[0018] In some embodiments, the temperature measuring hole is a straight hole, and the limiting structure is a limiting step protruding outward from the outer side of the positioning block. The limiting step is located outside the mold body, and one end face of the limiting step facing the mold body abuts against the mold body.

[0019] In some embodiments, the temperature measuring end abuts against the bottom surface of the temperature measuring hole.

[0020] In some embodiments, the diameter of the temperature sensing element is no greater than 1 mm.

[0021] In some embodiments, the material of the positioning block is the same as the material of the mold body.

[0022] The present invention also provides a method for testing mold interface temperature, wherein the mold interface temperature is tested using a casting mold as described in any of the above claims, the method comprising:

[0023] S1, the temperature measuring elements are inserted one by one into the positioning holes of each positioning block, and the temperature measuring end extends a set length outside the positioning block.

[0024] S2, each of the positioning blocks is installed in the temperature measuring hole in a corresponding manner, and the temperature measuring end is extended into the temperature measuring target area of ​​each of the temperature measuring holes;

[0025] S3, casting is carried out. During the entire casting stage, the temperature values ​​of various parts inside the mold body are tested over time by the temperature measuring elements.

[0026] S4. Based on the test data of each temperature measuring element, the temperature value inside the mold body at different distances from the interface of the mold to be tested is obtained by curve fitting at each moment.

[0027] S5. Calculate the temperature value of the interface of the mold under test at each moment using the fitted curve obtained in step S4.

[0028] S6, plot the temperature curve of the interface of the mold under test over time throughout the casting process.

[0029] In some embodiments, before the positioning block is inserted into the temperature measuring hole, a conductive filler is introduced into the temperature measuring hole. When the positioning block is inserted into a set position in the temperature measuring hole, the filler fills the filler space formed between the end face of the positioning block facing the temperature measuring target area and the bottom surface of the temperature measuring hole.

[0030] The present invention also provides a method for determining casting process parameters, wherein the temperature of the interface of the mold to be tested is tested using a casting mold as described in any of the above claims or the mold interface temperature testing method described above.

[0031] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: In the casting mold of the present invention for testing the interface temperature of a mold, the various temperature measuring structures are arranged at intervals along a direction perpendicular to the interface of the mold to be tested, and the measuring ends of each temperature measuring element are located on the same straight line extending along the direction perpendicular to the interface of the mold to be tested. This allows the temperature values ​​at different distances from the interface of the mold to be tested at the same location to be tested to be obtained in one casting process. At the same time, it can avoid the influence of the position deviation of each measuring point on the test results. Moreover, the casting mold has a good positioning effect on the temperature measuring elements during the test, thereby improving the temperature measurement accuracy and thus obtaining the temperature value of the interface of the mold to be tested more accurately. In addition, the casting mold has a simple structure, is easy to disassemble and reuse, and can reduce casting costs. Attached Figure Description

[0032] Appendix Figure 1 This is a three-dimensional schematic diagram of a casting mold used for testing the mold interface temperature in this embodiment.

[0033] Appendix Figure 2 This is a front view schematic diagram of the casting mold used for testing the mold interface temperature in this embodiment;

[0034] Appendix Figure 3 For the appendix Figure 2 Enlarged view of a portion of point A in the middle;

[0035] Appendix Figure 4 For the appendix Figure 2 sectional view along line AA;

[0036] Appendix Figure 5 For the appendix Figure 2 sectional view along line BB;

[0037] Appendix Figure 6 For the appendix Figure 5 Enlarged view of a portion of point A in the middle;

[0038] Appendix Figure 7 This is a schematic diagram of another embodiment;

[0039] Appendix Figure 8This is a schematic diagram of the fitting curve for the temperature values ​​inside the mold body at different distances from the mold interface at a certain moment.

[0040] The components are: 1. Mold body; 11. Fixed mold; 111. Cavity; 112. Temperature measuring hole; 1121. First hole; 1122. Second hole; 12. Moving mold; 2. Positioning block; 21. Positioning hole; 3. Temperature measuring element; 31. Temperature measuring end; 4. Data acquisition system; 5. Filler; 6. Limiting step. Detailed Implementation

[0041] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, such as... Figure 2 In the figures, the left direction is "left," the right direction is "right," the top direction is "up," and the bottom direction is "down." The directions perpendicular to the paper are "front" and "back." This is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] When determining casting process parameters through numerical simulation, it is necessary to obtain the heat transfer coefficient of the casting / mold interface. The heat transfer coefficient is calculated from the casting temperature and the mold interface temperature. However, since the mold interface is in direct contact with the melt, it cannot be directly measured by temperature measuring elements. The casting mold in this embodiment can be used to test the mold interface temperature. To avoid waste, the casting mold in this embodiment can also be used to make actual castings.

[0044] like Figures 1 to 7 As shown, the casting mold for testing the mold interface temperature of the present invention includes a mold body 1 and a temperature measuring structure disposed within the mold body 1.

[0045] The mold body 1 includes a fixed mold 11 and a moving mold 12. The fixed mold 11 has a cavity 111 for forming a casting. A temperature measuring structure is provided on the fixed mold 11 to detect the temperature inside the fixed mold 11 throughout the entire casting cycle, thereby determining the temperature of the mold interface A to be tested.

[0046] The temperature measuring structure includes a temperature measuring hole 112, a positioning block 2, a temperature measuring element 3, and a data acquisition system 4.

[0047] Temperature measuring hole 112 is set inside fixed mold 11. Temperature measuring hole 112 is a blind hole, and the bottom area of ​​the blind hole forms the temperature measuring target area.

[0048] The positioning block 2 is adapted to the temperature measuring hole 112. The positioning block 2 is at least partially disposed inside the temperature measuring hole 112. There is a gap between the end face of the positioning block 2 facing the temperature measuring target area and the bottom surface of the temperature measuring hole 112.

[0049] The positioning block 2 is provided with positioning holes 21 extending through both ends along its length, and the positioning holes 21 are adapted to the temperature measuring element 3.

[0050] The temperature measuring element 3 is used to measure the temperature inside the fixed mold 11. One end of the temperature measuring element 3 is the temperature measuring end 31. The temperature measuring element 3 passes through the positioning hole 21, and its temperature measuring end 31 extends to the outside of the positioning block 2 by a set length and extends into the temperature measuring target area.

[0051] The data acquisition system 4 is set outside the mold body 1, and the other end of the temperature measuring element 3 is connected to the data acquisition system 4 so as to record the temperature detected by the temperature measuring element 3 through the data acquisition system 4.

[0052] Positioning the temperature sensing element 3 using the positioning block 2 reduces its positional deviation within the temperature sensing hole 112. Furthermore, controlling the length of the temperature sensing end 31 extending beyond the positioning block 2 ensures that the temperature sensing end 31 extends into the target temperature measurement area of ​​the temperature sensing hole 112, thereby improving the accuracy and reliability of the temperature measurement results. Additionally, since the temperature sensing hole 112 is a blind hole, it also prevents molten material from leaking out and contacting the temperature sensing end 31 of the temperature sensing element 3, thus avoiding any impact on testing accuracy.

[0053] Multiple temperature measuring structures are spaced along the first direction E. The extension direction of the temperature measuring element 3 in each structure is perpendicular to the first direction E. In this way, the temperature value changing with time at different distances from the interface A of the mold to be tested can be measured throughout the entire casting cycle. In this embodiment, the first direction E is the left-right direction and is perpendicular to the interface A of the mold to be tested.

[0054] In the multiple temperature measurement structures, the temperature measuring ends 31 of each temperature measuring element 3 are located on the same straight line extending along the first direction E. Thus, the projections of each temperature measuring position at different distances onto the interface A of the mold under test are located at the same position on the interface A. Therefore, in the other two directions perpendicular to the first direction E, i.e., the... Figure 2In this invention, the distances from each temperature measuring position to the upper, lower, front, and rear sides of the fixed mold 11 are all the same in both vertical and horizontal directions, thus avoiding the influence of vertical or horizontal positional deviations on the test results. Furthermore, this invention can obtain the temperature values ​​at the same location on the mold interface A at different distances from it in a single casting process, preventing the influence of inconsistent casting process parameters on the test results. This results in higher accuracy of the temperature values ​​measured at each measuring position, enabling more accurate acquisition of the temperature values ​​at the corresponding locations on the mold interface A.

[0055] Preferably, the temperature measuring end 31 of each temperature measuring element 3 is in contact with the bottom surface of the temperature measuring hole 112 to ensure accurate temperature measuring position and thus improve temperature measuring accuracy.

[0056] The positioning block 2 and the fixed mold 11 are made of the same material, so that the positioning block 2 and the fixed mold 11 have the same temperature field, thereby improving the temperature measurement accuracy.

[0057] Each temperature sensing element 3 is connected to the same data acquisition system 4, which simplifies the overall structure and facilitates the overall data processing.

[0058] In this embodiment, the diameter of the temperature sensing element 3 is no greater than 1 mm. The smaller diameter of the temperature sensing element 3 results in higher sensitivity and faster response during temperature measurement. Furthermore, within a certain size range, the number and density of temperature sensing points can be increased, thereby improving temperature measurement accuracy.

[0059] The temperature sensing element 3 can be a thermocouple.

[0060] Each temperature measuring structure also includes a conductive filler 5. The gap between the end face of the positioning block 2 facing the temperature measuring target area and the bottom surface of the temperature measuring hole 112 forms a filler space. The filler 5 fills this filler space, and at least during the casting process, the filler 5 is in a liquid state. In this way, when the temperature measuring end 31 does not extend into the temperature measuring target area of ​​the temperature measuring hole 112, and a gap exists between the temperature measuring end 31 and the temperature measuring target area, the liquid filler 5 can tightly fill the gap, thereby avoiding the influence of the gap on the temperature measurement result and improving the temperature measurement accuracy.

[0061] In this embodiment, the filler 5 is liquid at room temperature, and its viscosity ranges from 1 mPa·s to 40000 mPa·s, with a thermal conductivity on the order of 10. 2W / m·K. Thus, when the mold begins to preheat and the local temperature of the mold is low, the filler 5 can fill the gap between the temperature measuring end 31 and the temperature measuring target area, thereby enabling accurate measurement of the mold temperature throughout the entire casting process. Furthermore, since the filler 5 is liquid at room temperature, it undergoes no phase change during the entire casting process. Therefore, it will not absorb heat due to a phase change, which would lower the temperature of the mold body 1 and thus affect the true temperature of the mold body 1, consequently impacting the measurement accuracy.

[0062] Specifically, filler 5 can be selected from gallium, gallium-indium alloy, gallium-indium-tin alloy, and gallium-indium-tin-zinc alloy.

[0063] The volume of the packing 5 is equal to or slightly smaller than the volume of the packing space, so as to ensure that the packing 5 can tightly fill the gap between the temperature measuring end 31 and the temperature measuring target area.

[0064] Preferably, the temperature measuring end 31 of the temperature measuring element 3 is located in the lower part of the packing space. Under the action of gravity, the packing 5 fully fills the lower part of the packing space. In this way, even when the volume of the packing 5 is smaller than the volume of the packing space, it can be ensured that the packing 5 can tightly fill the gap between the temperature measuring end 31 and the temperature measuring target area, thereby avoiding the influence of the gap on the temperature measurement result.

[0065] In this embodiment, the positioning block 2 is elongated, and the temperature measuring element 3 is located on the lower part of the positioning block 2, so that the temperature measuring end 31 of the temperature measuring element 3 is also located in the lower part of the filling space.

[0066] Each temperature measuring structure also includes a limiting structure, which limits the position of the positioning block 2 in the temperature measuring hole 112, so that after the positioning block 2 is installed in the temperature measuring hole 112, the temperature measuring end 31 of the temperature measuring element 3 can extend into the temperature measuring target area of ​​the temperature measuring hole 112.

[0067] The limiting structure is set on one of the fixed mold 11 and the positioning block 2, and is abutted and cooperates with the other one.

[0068] Specifically, in one embodiment, the temperature measuring hole 112 includes a first hole 1121 and a second hole 1122 arranged sequentially. The cross-sectional dimension of the first hole 1121 is smaller than that of the second hole 1122, i.e., the temperature measuring hole 112 is a stepped hole. A positioning block 2 is adapted to the second hole 1122 and is disposed within the second hole 1122. The cross-sectional dimension of the positioning block 2 is larger than that of the first hole 1121. The limiting structure is the end face of the first hole 1121 facing the second hole 1122. The end face of the positioning block 2 facing the temperature measurement target area abuts against the end face of the first hole 1121 facing the second hole 1122. The temperature measuring end 31 of the temperature measuring element 3 is located within the first hole 1121. In this embodiment, the accommodating space formed by the first hole 1121 is the filling space. Figure 5 and Figure 6 As shown.

[0069] In another embodiment, the temperature measuring hole 112 is a straight hole, and the limiting structure is a limiting step 6 protruding outward from the outer side of the self-positioning block 2. The limiting step 6 is located outside the fixed mold 11, and the end face of the limiting step 6 facing the fixed mold 11 abuts against the outer side of the fixed mold 11. Figure 7 As shown.

[0070] The method for testing the mold interface temperature using this casting mold specifically includes the following steps:

[0071] (1) The temperature measuring elements 3 are inserted one by one into the positioning holes 21 of each positioning block 2, and the temperature measuring end 31 extends out of the positioning block 2 by a set length. In this embodiment, the length of the temperature measuring end 31 extending out of the positioning block 2 is the same as the axial length of the first hole 1121.

[0072] (2) Pass the packing 5 into the temperature measuring hole 112. The volume of the packing 5 is equal to or slightly smaller than the volume of the packing space.

[0073] (3) Insert each positioning block 2 into each temperature measuring hole 112 one by one until the positioning block 2 moves to the position limited by the limiting structure. At this time, the temperature measuring end 31 of the temperature measuring element 3 extends into the temperature measuring target area of ​​each temperature measuring hole 112.

[0074] During the process of inserting the positioning block 2 into the temperature measuring hole 112, the packing 5 is pushed to move towards the packing space. After the positioning block 2 is installed in place, the packing 5 fills the packing space and fills the gap between the temperature measuring end 31 and the temperature measuring target area.

[0075] (4) The mold is preheated for a certain period of time and casting begins. During the entire process, the temperature values ​​of various positions inside the fixed mold 11 are measured over time by various temperature measuring elements 3.

[0076] (5) The test data of each temperature measuring element 3 is collected through the data acquisition system 4, and the temperature value at different distances from the interface A of the mold to be tested inside the fixed mold 11 at each moment is obtained by curve fitting. A schematic diagram of the fitting curve at a certain moment is shown below. Figure 8 As shown.

[0077] (6) The temperature value of the interface A of the mold under test at each moment is obtained by back-calculating the fitted curve obtained in step (5).

[0078] (7) Plot the temperature curve of the mold interface A as a function of time throughout the casting process.

[0079] By using the temperature value of the mold interface A as a function of time obtained by this invention, and then obtaining the temperature value of the melt as a function of time during the casting process, the heat transfer coefficient of the casting / mold interface can be calculated. This allows for numerical simulation of the casting process, which in turn enables the determination of casting process parameters when casting casting products, thereby improving the quality of the casting products.

[0080] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A casting mold for testing mold interface temperature, comprising a mold body, characterized in that: The casting mold further includes a temperature measuring structure for testing the internal temperature of the mold body, the temperature measuring structure comprising: A temperature measuring hole is provided inside the mold body. The temperature measuring hole is a blind hole, and the bottom area of ​​the blind hole forms a temperature measuring target area. The temperature sensing element has a temperature sensing end at one end and is used to connect to a data acquisition system located outside the mold body at the other end. A positioning block is disposed inside the temperature measuring hole and cooperates with the temperature measuring hole. There is a gap between the end face of the positioning block facing the temperature measuring target area and the bottom surface of the temperature measuring hole. The positioning block is provided with a positioning hole that cooperates with the temperature measuring element. The temperature measuring element passes through the positioning hole, and the temperature measuring end extends out of the positioning block and into the temperature measuring target area. The temperature measuring structure is provided in multiple ways at intervals along the first direction. The extension direction of the temperature measuring element in each temperature measuring structure is perpendicular to the first direction. The temperature measuring ends of the temperature measuring elements in the multiple temperature measuring structures are located on the same straight line extending along the first direction. The first direction is perpendicular to the interface of the mold to be measured. The interval forms a filling space, and the temperature measuring structure further includes a conductive filler that fills the filling space. The temperature measuring end extends into the filling space, and the filler fills the gap between the temperature measuring end and the temperature measuring target area.

2. The casting mold for testing mold interface temperature according to claim 1, characterized in that: At room temperature, the filler is in a liquid state, and the viscosity of the filler is 1 mPa·s to 40000 mPa·s.

3. The casting mold for testing the mold interface temperature according to claim 1 or 2, characterized in that: The temperature measuring end is located at the lower part of the packing space.

4. The casting mold for testing the mold interface temperature according to claim 1 or 2, characterized in that: The filler is one of gallium, gallium-indium alloy, gallium-indium-tin alloy, and gallium-indium-tin-zinc alloy.

5. The casting mold for testing mold interface temperature according to claim 1, characterized in that: The temperature measuring structure also includes a limiting structure for limiting the position of the positioning block in the temperature measuring hole.

6. The casting mold for testing mold interface temperature according to claim 5, characterized in that: The limiting structure is disposed on one of the mold body and the positioning block, and abuts against the other of the two.

7. The casting mold for testing mold interface temperature according to claim 6, characterized in that: The temperature measuring hole includes a first hole and a second hole arranged in sequence. The cross-sectional size of the first hole is smaller than that of the second hole. The limiting structure is an end face of the first hole facing the second hole. The positioning block is disposed in the second hole. The end face of the positioning block facing the temperature measuring target area abuts against the end face of the first hole facing the second hole. The temperature measuring end of the temperature measuring element is located in the first hole.

8. The casting mold for testing mold interface temperature according to claim 6, characterized in that: The temperature measuring hole is a straight hole, and the limiting structure is a limiting step that protrudes outward from the outer side of the positioning block. The limiting step is located outside the mold body, and the end face of the limiting step facing the mold body abuts against the mold body.

9. The casting mold for testing the mold interface temperature according to claim 1, characterized in that: The temperature measuring end is positioned against the bottom surface of the temperature measuring hole.

10. The casting mold for testing the mold interface temperature according to claim 1, characterized in that: The diameter of the temperature sensing element is no greater than 1 mm.

11. The casting mold for testing the mold interface temperature according to claim 1, characterized in that: The positioning block is made of the same material as the mold body.

12. A method for testing the interface temperature of a mold, characterized in that: The mold interface temperature is tested using a casting mold as described in any one of claims 1 to 11, and the test method includes: S1, the temperature measuring elements are inserted one by one into the positioning holes of each positioning block, and the temperature measuring end extends a set length outside the positioning block. S2, each of the positioning blocks is installed in the temperature measuring hole in a corresponding manner, and the temperature measuring end is extended into the temperature measuring target area of ​​each of the temperature measuring holes; S3, casting is carried out. During the entire casting stage, the temperature values ​​of various parts inside the mold body are tested over time by the temperature measuring elements. S4. Based on the test data of each temperature measuring element, the temperature value inside the mold body at different distances from the interface of the mold to be tested is obtained by curve fitting at each moment. S5. Calculate the temperature value of the interface of the mold under test at each moment using the fitted curve obtained in step S4. S6, Plot the temperature curve of the interface of the mold under test as a function of time throughout the casting process; Before the positioning block is inserted into the temperature measuring hole, a conductive filler is introduced into the temperature measuring hole. When the positioning block is inserted into the set position in the temperature measuring hole, the filler fills the filler space formed between the end face of the positioning block facing the temperature measuring target area and the bottom surface of the temperature measuring hole.

13. A method for determining casting process parameters, characterized in that: The temperature of the interface of the mold to be tested is measured using the casting mold as described in any one of claims 1 to 11 or the mold interface temperature testing method as described in claim 12.

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