Experimental device for simulating the service of a die casting die steel
By designing a cooling water section and a heating section in the experimental device, the simulation of alternating hot and cold temperatures is achieved, which solves the problem of inaccurate simulation of the service process of die-casting mold steel in the existing technology and improves the authenticity and reliability of the experimental data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-31
AI Technical Summary
Existing experimental setups cannot accurately simulate the thermal shocks that die-casting mold steel experiences during service, leading to inaccurate experimental results.
An experimental device was designed, comprising a cooling water section and a heating section. It is sealed to the die-casting mold via a quick connector, allowing cooling water to enter from the bottom and flow out from the top. Combined with a DC water pump and a heating controller, it simulates the alternation of hot and cold during the die-casting process, and uses a control system to uniformly schedule the heating and cooling processes.
It improves cooling uniformity and heating precision, making experimental data closer to actual working conditions and enhancing the accuracy and reliability of experimental results.
Smart Images
Figure CN224581454U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of materials testing technology, specifically to an experimental device for simulating the service process of die-casting mold steel. Background Technology
[0002] Die casting technology, as a highly efficient near-net-shape forming process, is widely used in aerospace, transportation, and high-end equipment manufacturing due to its ability to form complex three-dimensional structures in a single operation, high dimensional accuracy, and excellent surface quality. Especially against the backdrop of the automotive industry's electrification and intelligent transformation, the penetration rate of aluminum alloy die casting molds in vehicle body structures is growing exponentially. Typical applications include safety structural components such as engine blocks and transmission housings, collision energy management components such as A / B / C pillar reinforcement plates, and functional integrated components such as battery pack frames.
[0003] The die-casting mold cavity is directly subjected to the periodic high-speed scouring of molten metal at 200-700℃. Its internal water-cooling system causes the mold steel to experience a drastic temperature difference of over 500℃ in a single die-casting cycle. This working condition is prone to failure problems, such as fatigue cracks on the mold surface due to thermal softening and thermal stress, and carbide precipitation, grain boundary weakening, and temper brittleness in the internal structure. For example, Chinese patent document CN118777106A discloses a thermal fatigue testing device, in which a connecting pipe is connected to the bottom of the heating chamber. The bottom end of the connecting pipe is immersed in the cooling water tank, and the connecting pipe is connected to an inert gas source. The lifting platform is located above the heating chamber and is connected to the sample by a suspension wire. The connecting end of the suspension wire for connecting the sample is located inside the heating chamber. Immersing the connecting pipe in the cooling water tank is different from the internal cooling of the mold, and cannot completely simulate the temperature difference inside the mold, which can easily lead to inaccurate simulation results. Utility Model Content
[0004] The present invention aims to provide an experimental apparatus for simulating the service process of die-casting mold steel, so as to provide an experimental apparatus for more accurately simulating the service performance of molds.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: an experimental device for simulating the service process of die-casting mold steel, comprising an experimental platform, a cooling water section, and a heating section for heating the outer periphery of the die-casting mold. The cooling water section includes a circulating water tank and an outlet pipe and a return pipe connected to the circulating water tank. Both the end of the return pipe and the end of the outlet pipe are provided with quick connectors. The quick connector at the end of the outlet pipe is fixed to the upper surface of the experimental platform, and the quick connector at the end of the return pipe is used to connect with the upper part of the die-casting mold. The outer periphery of the quick connector is provided with external threads for sealing connection with both ends of the die-casting mold, and each quick connector has a water passage hole.
[0006] The beneficial effects of this plan are: Cooling water enters from the bottom of the die-casting mold and flows out from the top, ensuring uniform contact between the mold's inner wall and the cooling water. The bottom-in, top-out design ensures even cooling, and the vertically integrated water system comprehensively covers the mold's internal channels, effectively preventing localized overcooling or overheating and improving cooling uniformity and stability. Both the return and outlet pipes are sealed to the mold ends with external threaded quick-connect fittings, guaranteeing water system tightness during experiments and facilitating quick assembly and disassembly, thus improving operational convenience. This allows for a more accurate simulation of the thermal shock processes experienced by the mold steel during the die-casting cycle, enhancing the consistency between experimental data and actual conditions and ensuring the reliability of the results.
[0007] Preferably, as an improvement, the heating section includes a heating controller and a thermocouple electrically connected to the heating controller, the thermocouple being able to be fitted around the outer periphery of the die-casting mold.
[0008] The beneficial effects are as follows: The thermocouple is fitted around the outer periphery of the die-casting mold to simulate the temperature rise during the die-casting process, making the heating and control position closer to the heated surface of the die-casting mold, thereby more accurately simulating the external thermal shock that the mold is subjected to during the die-casting process. At the same time, the heating controller controls the temperature, which can realize the dynamic adjustment of the heating process and improve the heating accuracy.
[0009] Preferably, as an improvement, a DC water pump is installed inside the circulating water tank.
[0010] The beneficial effects are: driven by a DC water pump, cooling water can flow quickly through the inner cavity of the die-casting mold, accelerating the heat exchange rate, and making the alternation of hot and cold during the experiment closer to the actual service conditions of the die-casting mold.
[0011] Preferably, as an improvement, it also includes a control system, which is electrically connected to the DC water pump and the heating controller.
[0012] The beneficial effects are as follows: the control system is electrically connected to both the DC water pump and the heating controller, which can uniformly schedule the heating and cooling processes, form a more realistic temperature gradient, improve the authenticity and reliability of experimental data, and avoid experimental instability caused by the independent operation of the two.
[0013] Preferably, as an improvement, the return water pipe passes through the inside of the experimental platform and is fixed to the surface of the experimental platform.
[0014] The beneficial effect is that the return water pipe is installed inside the experimental platform and then fixed to the platform, which avoids excessive exposure of external pipes and makes the overall structure simpler and more compact. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is an exploded view of the die-casting mold connection according to an embodiment of the present invention.
[0016] The reference numerals in the accompanying drawings of the instruction manual include: 1. Experimental platform; 2. Circulating water tank; 3. Outlet pipe; 4. Return pipe; 5. Quick connector; 6. Water passage hole; 7. External thread; 8. Die-casting mold; 9. Thermocouple; 10. Heating controller; 11. Control system. Detailed Implementation
[0017] The following detailed description is provided through specific implementation methods and examples: The preferred embodiments of this utility model are basically as shown in the appendix. Figure 1-2 As shown, Figure 1 and Figure 2 The experimental apparatus shown for simulating the service process of die-casting mold steel includes an experimental platform 1, a cooling water section, and a heating section for heating the outer periphery of the die-casting mold 8. The cooling water section includes a circulating water tank 2 and an outlet pipe 3 and a return pipe 4 connected to the circulating water tank 2. Both the end of the return pipe and the end of the outlet pipe 3 are equipped with quick-connect fittings 5. The quick-connect fitting 5 at the end of the outlet pipe 3 is fixed to the upper surface of the experimental platform 1. The quick-connect fitting 5 at the end of the return pipe 4 is used to connect to the upper part of the die-casting mold 8. Each quick-connect fitting 5 has external threads 7 on its outer periphery for sealing connection with both ends of the die-casting mold 8, and each quick-connect fitting 5 has a water passage hole 6. To make the structure simple and reliable, the preferred embodiment of this invention is that the return pipe 4 passes through the interior of the experimental platform 1 and is then fixed to the upper surface of the experimental platform 1. This avoids excessive exposure of external pipes, making the overall structure more concise and compact.
[0018] Cooling water enters from the bottom of the die-casting mold 8 and flows out from the top, ensuring uniform contact between the inner wall of the mold and the cooling water. The bottom-in, top-out design ensures even cooling, and the through-flow water system fully covers the internal channels of the mold, effectively preventing localized overcooling or overheating and improving cooling uniformity and stability. Both the return pipe 4 and the outlet pipe 3 are sealed to both ends of the die-casting mold 8 via external threaded quick-connect fittings 5. This ensures water system sealing during the experiment and facilitates quick assembly and disassembly, improving operational convenience. It also more accurately simulates the thermal shock process experienced by the mold steel during the die-casting cycle, thus improving the consistency between experimental data and actual working conditions and ensuring the reference value of the experimental results.
[0019] To ensure a simple structure, reliable heating, and ease of assembly, the preferred embodiment of this invention includes a heating unit comprising a heating controller 10 and a thermocouple 9 electrically connected to the heating controller 10. The thermocouple 9 is fitted around the outer periphery of the die-casting mold 8 to simulate the temperature rise during the die-casting process. This allows the heating and control position to be closer to the heated surface of the die-casting mold 8, thereby more accurately simulating the external thermal shock experienced by the mold during the die-casting process. Simultaneously, the heating controller 10 controls the temperature, enabling dynamic adjustment of the heating process and improving heating accuracy.
[0020] To ensure a simple, reliable, and easy-to-assemble structure, the preferred embodiment of this invention is that a DC water pump is installed inside the circulating water tank 2. Driven by the DC water pump, cooling water can flow quickly through the inner cavity of the die-casting mold 8, accelerating the heat exchange rate and making the alternation of hot and cold during the experiment more closely resemble the actual service conditions of the die-casting mold.
[0021] To ensure a simple, reliable, and easy-to-assemble structure, the preferred embodiment of this invention further includes a control system 11. The control system 11 is electrically connected to the DC water pump and the heating controller 10. The control system 11 is also electrically connected to the DC water pump and the heating controller 10, which can uniformly schedule the heating and cooling processes, form a more realistic temperature gradient, improve the authenticity and reliability of experimental data, and avoid experimental instability caused by the independent operation of the two.
[0022] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. Experimental device for simulating the service of a die casting die steel, comprising an experimental bench (1), a cooling water section and a heating section for heating the periphery of a die casting die (8), characterized in that: The cooling water section includes a circulating water tank (2) and an outlet pipe (3) and a return pipe (4) connected to the circulating water tank (2). The end of the return pipe (4) and the end of the outlet pipe (3) are provided with quick connectors (5). The quick connector (5) at the end of the outlet pipe (3) is fixed to the upper surface of the experimental table (1). The quick connector (5) at the end of the return pipe (4) is used to connect with the upper part of the die-casting mold (8). The outer periphery of the quick connector (5) is provided with external threads (7) for sealing connection with both ends of the die-casting mold (8), and the quick connector (5) is provided with water passage holes (6).
2. The experimental setup for simulating the service process of die casting die steel according to claim 1, characterized in that: The heating part includes a heating controller (10) and a thermocouple (9) electrically connected to the heating controller (10). The thermocouple (9) can be fitted around the outer periphery of the die-casting mold (8).
3. The experimental apparatus for simulating the service process of die-casting mold steel according to claim 1, characterized in that: A DC water pump is installed inside the circulating water tank (2).
4. The experimental setup for simulating the service process of die casting die steel according to claim 3, characterized in that: It also includes a control system (11), which is electrically connected to a DC water pump and a heating controller (10).
5. The experimental setup for simulating the service process of die casting die steel according to claim 1, characterized in that: The return water pipe (4) passes through the inside of the experimental table (1) and is then fixed to the upper surface of the experimental table (1).