A method and apparatus for designing a hot stamping die water channel

Abstract

The application relates to the technical field of electronic digital data processing, in particular to a design method and device for a hot stamping die water channel. The design method comprises the following steps: determining feature parameters of branch water channels based on the external contour of a part; wherein the feature parameters comprise the type and position of the branch water channels; the type comprises an arc-shaped water channel and a straight-shaped water channel; obtaining the outlet pressure and pressure loss of each branch water channel to determine the inlet pressure of each branch water channel; establishing a water channel thermal simulation model based on the feature parameters, the inlet pressure and the outlet pressure to obtain the elbow angle of the arc-shaped water channel and the straight pipe radius of the straight-shaped water channel; and correcting the water channel thermal simulation model through the pressure maintaining pressure parameters of the part.

Description

Technical Field

[0001] This application relates to the field of electronic digital data processing technology, and in particular to a design method and apparatus for a hot stamping die water channel. Background Technology

[0002] The hot stamping process used to manufacture the parts involves cold water stamping through cooling channels within the mold to achieve quenching and cooling. To ensure uniform performance across all parts after cooling, the cooling effect of each branch of the cooling channel corresponding to different parts of the part must be the same at the same time. For molds designed according to the shape of the part, the flow rate and pressure of the cold water at bends and straight pipes differ. When the part shape is complex, designing the water channels using pure theory involves a large amount of calculation, is costly, and lacks accuracy. Using simulation methods alone requires repeatedly modifying the dimensions of each water channel within the entire mold according to different pipe diameters, which also suffers from high calculation volume, cost, and low accuracy, hindering the improvement of part performance. Summary of the Invention

[0003] This application provides a design method for the cooling channels of hot stamping dies, which solves the technical problems of large computational load, low accuracy and high cost in the design and optimization of cooling channels for hot stamping dies.

[0004] In a first aspect, this application provides a method for designing water channels in hot stamping dies, the method comprising:

[0005] Based on the external contour of the part, the initial feature parameters of the branch waterway are obtained;

[0006] The inlet and outlet pressures of each of the branch channels are obtained to determine the pressure loss of each of the branch channels;

[0007] A waterway thermal simulation model is established based on the initial characteristic parameters and the pressure loss.

[0008] The thermal simulation model of the waterway is corrected by adjusting the pressure holding parameters of the parts to obtain the actual characteristic parameters of the branch waterway.

[0009] Furthermore, the initial characteristic parameters include the type, location, size, and angle of the branch waterway;

[0010] The initial feature parameters of the branch waterway, obtained based on the external contour of the part, include:

[0011] On the outside of the part, an irregular water channel with a shape similar to the outer surface of the part is provided, and the irregular water channel is formed by connecting different types of branch water channels.

[0012] Furthermore, the types include straight waterways and curved waterways;

[0013] The design method includes obtaining the pressure loss of the straight waterway using the following formula:

[0014]

[0015] Among them, Q v Let r0 be the radius of the straight waterway, μ be the viscosity coefficient of water, l be the length of the straight waterway, and p0 be the inlet pressure of the straight pipe. l The outlet pressure of the straight pipe is given.

[0016] Furthermore, the waterway thermal simulation model is established and corrected using simulation software.

[0017] Furthermore, the pressure holding parameters include: the highest temperature of the part, and the pressure holding pressure corresponding to the highest temperature;

[0018] The step of correcting the waterway thermal simulation model by adjusting the pressure-holding parameters of the parts includes:

[0019] Input multiple sets of the pressure-holding parameters into the waterway thermal simulation model;

[0020] The initial feature parameters are adjusted according to the thermal imaging pattern of the thermal simulation model until the distance from each point on the outer edge of the thermal imaging pattern to the outer side of the part is equal.

[0021] Furthermore, the design method also includes: before thermal simulation, setting the holding time to be greater than or equal to 8s until the highest temperature is lower than 200℃, and the initial holding pressure is 3000kN.

[0022] Furthermore, obtaining the actual characteristic parameters of the branch waterway includes obtaining the actual radius of the straight waterway and the actual curvature of the arc-shaped waterway in the corrected waterway thermal simulation model.

[0023] Secondly, this application provides a design apparatus for water channels in hot stamping dies, the design apparatus comprising,

[0024] The first module is used to obtain the initial feature parameters of the branch waterway based on the external contour of the part;

[0025] The second module is used to obtain the inlet pressure and outlet pressure of each of the branch waterways in order to determine the pressure loss of each of the branch waterways;

[0026] The third module is used to establish a waterway thermal simulation model based on the initial characteristic parameters and the pressure loss.

[0027] The fourth module is used to correct the waterway thermal simulation model by using the pressure holding parameters of the parts, so as to obtain the actual characteristic parameters of the branch waterway.

[0028] Thirdly, this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method described in any of the first aspects.

[0029] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of any of the methods described in the first aspect.

[0030] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0031] In this embodiment of the invention, initial characteristic parameters of the branch water channels are first obtained based on the external contour of the part; then, the inlet and outlet pressures of each branch water channel are obtained to determine the pressure loss of each branch water channel; next, a water channel thermal simulation model is established based on the initial characteristic parameters and the pressure loss; finally, the water channel thermal simulation model is corrected using the pressure holding parameters of the part to obtain the actual characteristic parameters of the branch water channels. This method simplifies the design process of cooling water channels for hot stamping dies, corrects the characteristic parameters of the branch water channels through thermal simulation, thereby improving the design accuracy of the die, reducing design costs, and consequently bringing about technical effects beneficial to the improvement and enhancement of part performance. Attached Figure Description

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference figures denote the same parts throughout the drawings.

[0033] In the attached diagram:

[0034] Figure 1 A schematic flowchart of the method steps in an embodiment of the present invention is shown;

[0035] Figure 2 This illustrates the relationship between the pressure holding pressure and the diameter of the straight waterway in an embodiment of the present invention.

[0036] Figure 3 This illustrates the relationship between the pressure holding force and the angle of the arc-shaped bend in the arc-shaped waterway in an embodiment of the present invention.

[0037] Figure 4 A schematic diagram of an electronic structure device according to an embodiment of the present invention is shown. Detailed Implementation

[0038] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0039] Example 1

[0040] To address the technical challenges of high computational complexity and cost in the design and optimization of cooling channels for hot stamping dies, this embodiment provides the following... Figure 1 The method shown is a design method for a hot stamping die water channel, the method includes steps S101-S104.

[0041] S101, Based on the external contour of the part, obtain the initial feature parameters of the branch waterway;

[0042] S102, Obtain the inlet pressure and outlet pressure of each of the branch waterways to determine the pressure loss of each of the branch waterways;

[0043] S103, Establish a waterway thermal simulation model based on the initial characteristic parameters and the pressure loss;

[0044] S104, the waterway thermal simulation model is corrected by the pressure holding parameters of the parts to obtain the actual characteristic parameters of the branch waterway.

[0045] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0046] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0047] First, step S101 is executed to obtain the initial feature parameters of the branch waterway based on the external contour of the part.

[0048] Specifically, in continuous production, to ensure that hot-stamped parts are rapidly cooled from a high initial temperature to a target temperature below room temperature, cooling water needs to be continuously circulated through the hot stamping die. This allows for continuous heat exchange between the cold water and the high-temperature parts, achieving the goal of cooling the parts. Different manufacturers have different requirements for the target cooling temperature; most manufacturers require cooling to below 100°C.

[0049] On the outside of the parts that need to be cooled, irregular water channels with a shape similar to the outer surface of the parts are provided. The irregular water channels are formed by connecting different types of branch water channels.

[0050] The initial characteristic parameters to be obtained in Example 1 include the type, location, size, and angle of the branch waterway.

[0051] The branch waterway types involved in Example 1 include straight waterways and curved waterways; the starting point coordinates and ending point coordinates of the straight waterway are recorded to determine the length of the straight waterway; the center coordinates and radius of the curved waterway are recorded to determine the location of the branch waterway.

[0052] In the initial stage, the vertical distance from each point of the irregular waterway in the horizontal direction to the outer surface of the part is set to be equal; for straight waterways, this preset vertical distance is the initial diameter of the straight waterway, which is set here based on the empirical value of the waterway diameter of similar parts; for curved waterways, this preset vertical distance is used as the initial radius of the curved waterway.

[0053] Next, the bend angle and arc length of the arc waterway are determined based on the center coordinates and initial radius of the arc waterway.

[0054] Execute step S102 to obtain the inlet pressure and outlet pressure of each branch waterway in order to determine the pressure loss of each branch waterway.

[0055] When analyzing different pressures and diameters, the pressure loss at bends can be obtained through simulation analysis, while the pressure loss in straight waterways can be calculated using theoretical formulas. In straight waterways, pressure loss increases with pipe length; at bends, pressure loss is greater. Furthermore, different bend angles result in different pressure loss values. Therefore, it is necessary to perform simulation analysis of the pressure loss values ​​at different bends, and then calculate the total pressure loss of the entire waterway.

[0056] The design method includes obtaining the pressure loss of the straight waterway using the following formula:

[0057]

[0058] Among them, Q v Let r0 be the radius of the straight waterway, μ be the viscosity coefficient of water, l be the length of the straight waterway, and p0 be the inlet pressure of the straight pipe. l The outlet pressure of the straight pipe is given.

[0059] The flow rate of the branch pipes is preset based on empirical values, and the inlet and outlet pressures can be obtained at the corresponding inlet and outlet using pressure measuring instruments.

[0060] The pressure loss of each branch pipe is calculated using the method described above. The main inlet pressure value of the mold's main inlet can be obtained using the following formula:

[0061] p n (q)=p1+Δp 2-1 +Δp 2-3 +·····+Δp (n-1)-n (2)

[0062] In the formula, p1 is the outlet pressure of the branch channel when the flow rate is q, and Δp 2-1 This represents the pressure loss in the section closest to the outlet. Δp (n-1)-n This refers to the pressure loss at the outlet. n (q) represents the outlet pressure of the branch channel when the flow rate is q.

[0063] Step S103 is executed to establish a waterway thermal simulation model based on the initial characteristic parameters and the pressure loss.

[0064] After obtaining the type, location, size, angle, inlet pressure, outlet pressure, pressure loss, and main inlet pressure of each branch waterway, the above data are input into the software to build a waterway thermal simulation model.

[0065] The model data at this point is inaccurate; the initial thermal imaging of the simulated part shows that the thermal radiation zone is not yet evenly distributed.

[0066] Therefore, step S104 is then executed to correct the waterway thermal simulation model using the pressure holding parameters of the parts in order to obtain the actual characteristic parameters of the branch waterway.

[0067] The pressure holding parameters include: the highest temperature of the part, and the pressure holding pressure corresponding to the highest temperature.

[0068] The correction of the waterway thermal simulation model by adjusting the pressure holding parameters of the parts includes:

[0069] Input the following sets of pressure-holding parameters into the waterway thermal simulation model;

[0070] Serial Number Maximum demolding temperature T of part Holding pressure P (kN) 1 200≥T＞180 P = 20T - 400 2 180≥T＞160 P = 10T - 1400 3 160≥T＞140 P = 5T + 2200 4 140≥T＞120 P = 10T + 1500 5 120≥T＞100 P = 15T + 900 6 100≥T 2400

[0071] Before thermal simulation, the holding pressure time is set to 8 seconds. If the model still cannot bring the maximum demolding temperature of the part below 200°C even at the maximum holding pressure, the holding pressure time needs to be extended, such as to 10 seconds or 12 seconds. The model is then used for further adjustment at the new holding pressure time until the maximum temperature is below 200°C. The initial holding pressure is 3000 kN.

[0072] Next, the initial feature parameters are adjusted according to the thermal imaging pattern of the thermal simulation model until the distance from each point on the outer edge of the thermal imaging pattern to the outer side of the part is equal.

[0073] As attached Figure 2 As shown, the inlet flow rate is set to 0.001m³. 3 The relationship between the pressure holding pressure in a straight waterway and the diameter of the straight waterway at a given time ( / s).

[0074] As attached Figure 3 As shown, the inlet flow rate is set to 0.001m³. 3 The relationship between the pressure holding pressure in the arc-shaped waterway and the angle of the arc-shaped bend at a time of / s.

[0075] Record the actual radius of the straight waterway and the actual curvature of the arc-shaped waterway in the waterway thermal simulation model at this time. Combine this with the previously determined length and position of each branch waterway to complete the mold design corresponding to the part.

[0076] As an optional implementation, this embodiment also provides a design device for water channels in hot stamping dies, the design device comprising:

[0077] The first module is used to obtain the initial feature parameters of the branch waterway based on the external contour of the part;

[0078] The second module is used to obtain the inlet pressure and outlet pressure of each of the branch waterways in order to determine the pressure loss of each of the branch waterways;

[0079] The third module is used to establish a waterway thermal simulation model based on the initial characteristic parameters and the pressure loss.

[0080] The fourth module is used to correct the waterway thermal simulation model by using the pressure holding parameters of the parts, so as to obtain the actual characteristic parameters of the branch waterway.

[0081] The method or apparatus provided in this embodiment simplifies the design process of cooling channels for hot stamping dies. By correcting the characteristic parameters of branch channels through thermal simulation, the design accuracy of the die is improved, the design cost is reduced, and the resulting technical effects are beneficial to the improvement and enhancement of part performance.

[0082] Example 2

[0083] Based on the same inventive concept, Embodiment 2 of this application provides an electronic device, as shown in the appendix. Figure 4 As shown, it includes a memory 304, a processor 302, and a computer program stored in the memory 304 and executable on the processor 302. When the processor 302 executes the program, it implements the steps of the above-described design method for a hot stamping die water channel.

[0084] Among them, Figure 4 In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 306 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 can be used to store data used by processor 302 during operation.

[0085] Example 3

[0086] Based on the same inventive concept, Embodiment 3 of the present invention provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described design method for a hot stamping die water channel.

[0087] The algorithms and displays provided herein are not inherently related to any particular computer, virtual system, or other device. Various general-purpose systems can also be used in conjunction with the teachings herein. The required structure for constructing such systems is apparent from the above description. Furthermore, this invention is not directed to any particular programming language. It should be understood that the contents of the invention described herein can be implemented using various programming languages, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the invention.

[0088] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0089] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0090] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0091] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0092] The various component embodiments of the present invention can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components in the electronic device according to embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such programs implementing the present invention can be stored on a computer-readable medium or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0093] The above descriptions are merely embodiments of this application. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this application. These should also be considered within the scope of protection of this application, and will not affect the effectiveness of the implementation of this application 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. A method for designing water channels in a hot stamping die, characterized in that, The design method includes: Based on the external contour of the part, the initial feature parameters of the branch waterway are obtained; wherein, the initial feature parameters include the type, position, size, and angle of the branch waterway; the type includes straight waterway and arc waterway; The inlet and outlet pressures of each of the branch channels are obtained to determine the pressure loss of each of the branch channels; A waterway thermal simulation model is established based on the initial characteristic parameters and the pressure loss. The thermal simulation model of the waterway is corrected by adjusting the pressure holding parameters of the parts in order to obtain the actual characteristic parameters of the branch waterway. The process of obtaining the actual characteristic parameters of the branch waterway includes obtaining the actual radius of the straight waterway and the actual curvature of the arc-shaped waterway in the modified waterway thermal simulation model. The pressure holding parameters include: the highest temperature of the part, and the pressure holding pressure corresponding to the highest temperature; The correction of the waterway thermal simulation model by adjusting the pressure holding parameters of the parts includes: Input multiple sets of the pressure-holding parameters into the waterway thermal simulation model; The initial feature parameters are adjusted according to the thermal imaging pattern of the thermal simulation model until the distance from each point on the outer edge of the thermal imaging pattern to the outer side of the part is equal.

2. The design method for a hot stamping die water channel as described in claim 1, characterized in that, The initial feature parameters of the branch waterway, obtained based on the external contour of the part, include: On the outside of the part, an irregular water channel with a shape similar to the outer surface of the part is provided, and the irregular water channel is formed by connecting different types of branch water channels.

3. The design method for a hot stamping die water channel as described in claim 2, characterized in that, The design method includes obtaining the pressure loss of the straight waterway using the following formula: in, The preset water flow rate of the branch waterway The radius of the straight waterway is... Let l be the viscosity coefficient of water, and l be the length of the straight waterway. The inlet pressure of the straight waterway is [value]. The outlet pressure of the straight waterway is given.

4. The design method for a hot stamping die water channel as described in claim 1, characterized in that, The waterway thermal simulation model is established and corrected using simulation software.

5. The design method for a hot stamping die water channel as described in claim 1, characterized in that, The design method further includes: before thermal simulation, setting the holding time to be greater than or equal to 8s until the highest temperature is below 200℃, and the initial holding pressure is 3000kN.

6. A design device for water channels in a hot stamping die, characterized in that, The design device includes The first module is used to obtain initial feature parameters of the branch waterway based on the external contour of the part; wherein, the initial feature parameters include the type, position, size, and angle of the branch waterway; the type includes straight waterway and arc waterway; The second module is used to obtain the inlet pressure and outlet pressure of each of the branch waterways in order to determine the pressure loss of each of the branch waterways; The third module is used to establish a waterway thermal simulation model based on the initial characteristic parameters and the pressure loss. The fourth module is used to correct the waterway thermal simulation model by using the pressure holding parameters of the parts, so as to obtain the actual characteristic parameters of the branch waterway; The process of obtaining the actual characteristic parameters of the branch waterway includes obtaining the actual radius of the straight waterway and the actual curvature of the arc-shaped waterway in the modified waterway thermal simulation model. The pressure holding parameters include: the highest temperature of the part, and the pressure holding pressure corresponding to the highest temperature; The correction of the waterway thermal simulation model by adjusting the pressure holding parameters of the parts includes: Input multiple sets of the pressure-holding parameters into the waterway thermal simulation model; The initial feature parameters are adjusted according to the thermal imaging pattern of the thermal simulation model until the distance from each point on the outer edge of the thermal imaging pattern to the outer side of the part is equal.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method as described in any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in any one of claims 1-5.

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