WO2024045089A1

WO2024045089A1 - Method for generating cooling flow channels, and device

Info

Publication number: WO2024045089A1
Application number: PCT/CN2022/116359
Authority: WO
Inventors: 张卿卿; 贾琇; 布拉特纳·弗兰兹·格奥尔格
Original assignee: 西门子股份公司; 西门子（中国）有限公司
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2024-03-07

Abstract

Provided in the embodiments of the present application are a method for generating cooling flow channels, and a device, which can effectively shorten the time and reduce the workload for generating cooling flow channels. The method comprises: acquiring input parameters, the input parameters comprising geometric functional limitations and process limitations, wherein the geometric functional limitations comprise at least one of the following: the smoothness of cooling flow channels, the tangency of the cooling flow channels, the non-intersection between the cooling flow channels and the non-intersection between the cooling flow channels and an obstacle, and the process limitations comprise at least one of the following: the construction directions of the cooling flow channels, the minimum value of an overhang angle and the maximum allowable diameter of the cooling flow channels; acquiring the initial states of the cooling flow channels; and adjusting the initial states according to the input parameters, so as to obtain the cooling flow channels.

Description

Method and device for generating cooling flow channels

Technical field

The present application relates to the technical field of mold manufacturing, and more specifically, to a method and device for generating cooling flow channels.

Background technique

In the process of manufacturing molds, the mold temperature directly affects the quality and production efficiency of the final product, so the temperature control of the mold is particularly important. It is mainly controlled and adjusted appropriately through the cooling channels of the mold.

The traditional cooling runner mainly adopts the conventional processing method of drilling, so the cooling runner of the designed mold is mainly linear. It is difficult for linear cooling channels to meet the requirements of uniform cooling. In order to improve the cooling effect, conformal cooling technology has emerged, that is, the cooling flow channel changes according to changes in the shape of the product, which can achieve uniform cooling, reduce cooling time, and has strong applicability.

However, the current process of designing conformal cooling channels takes a long time and requires a large amount of work.

Contents of the invention

This application provides a method and device for generating cooling flow channels, which can effectively reduce the time and workload of generating cooling flow channels.

In a first aspect, a method for generating a cooling flow channel is provided, including: obtaining input parameters, the input parameters including geometric functional constraints and process constraints, wherein the geometric functional constraints include at least one of the following: cooling flow The smoothness of the channels, the tangency of the cooling channels, the non-intersection between the cooling channels and the non-intersection between the cooling channels and obstacles, the process limitations include at least one of the following: The construction direction of the cooling flow channel, the minimum overhang angle and the maximum allowable diameter of the cooling flow channel; obtain the initial state of the cooling flow channel; adjust the initial state according to the input parameters to obtain the Cooling channels.

In the embodiment of the present application, geometric functional constraints including at least one of smoothness, tangency and non-intersection of the cooling flow channel are obtained, and at least one of the construction direction, minimum overhang angle and maximum allowable diameter of the cooling flow channel is obtained. kind of process constraints. In this way, the initial state of the cooling flow channel can be automatically adjusted according to the obtained geometric function constraints and process constraints, thereby effectively reducing the time and workload of generating the cooling flow channel. . Furthermore, since the smoothness, tangency, non-intersection, construction direction, minimum overhang angle, and maximum allowable diameter of the cooling flow channels are closely related to the cooling effect of the cooling flow channels, therefore, based on these parameters, the cooling flow channels The initial state is adjusted so that the generated cooling flow channel has a better cooling effect and can meet the design requirements to a large extent.

In a second aspect, a device for generating a cooling flow channel is provided, including: an acquisition unit configured to acquire input parameters, where the input parameters include geometric functional constraints and process constraints, wherein the geometric functional constraints include at least one of the following One: the smoothness of the cooling channels, the tangency of the cooling channels, the non-intersection between the cooling channels and the non-intersection between the cooling channels and obstacles, the process limitations include at least one of the following One: the construction direction of the cooling flow channel, the minimum overhang angle and the maximum allowable diameter of the cooling flow channel; the acquisition unit is also used to obtain the initial state of the cooling flow channel; the adjustment unit is used to According to the input parameters, the initial state is adjusted to obtain the cooling flow channel.

In a third aspect, a device for generating a cooling flow channel is provided, including: a memory for storing a program; a processor for executing the program stored in the memory. When the program stored in the memory is executed, the The processor is configured to execute the method for generating a cooling flow channel in the above first aspect or various implementations thereof.

In a fourth aspect, a computer-readable storage medium is provided. The computer-readable medium stores program code for device execution. The program code includes a program code for executing the generation of the above-mentioned first aspect or its respective implementations. Instructions for the steps in the cooling runner method.

Description of drawings

Figure 1 is a schematic diagram of a mold including conformal cooling channels manufactured using the AM process according to an embodiment of the present application.

Figure 2 is a schematic flow chart of a method for generating cooling flow channels according to an embodiment of the present application.

FIG. 3 is a schematic diagram of the smoothness of the cooling flow channel according to the embodiment of the present application.

FIG. 4 is a schematic diagram of the tangency of the cooling flow channels according to the embodiment of the present application.

FIG. 5 is a schematic diagram of the non-intersection between one cooling flow channel and other cooling flow channels according to the embodiment of the present application.

FIG. 6 is a schematic diagram of the non-intersection between another cooling flow channel and other cooling flow channels according to the embodiment of the present application.

FIG. 7 is a schematic diagram of the non-intersection between a cooling flow channel and obstacles other than other cooling flow channels according to an embodiment of the present application.

Figure 8 is a schematic diagram of non-intersection between another cooling flow channel and obstacles other than other cooling flow channels according to the embodiment of the present application.

FIG. 9 is a schematic diagram of the initial cross-section of the cooling flow channel according to the embodiment of the present application.

Figure 10 is a schematic block diagram of a device for generating cooling flow channels according to an embodiment of the present application.

Figure 11 is a schematic block diagram of a device for generating cooling flow channels according to an embodiment of the present application.

List of reference signs:

200, method of generating cooling flow channels;

210, obtain input parameters;

220, obtain the initial state of the cooling flow channel;

230. Adjust the initial state according to the input parameters to obtain the cooling flow channel;

T, the tangent vector of the initial centerline;

0, the entrance of the cooling channel;

1. The outlet of the cooling runner;

i, the center of the initial cross-section of the cooling channel 1;

R _i , the distance moved by the initial centerline of cooling flow channel 1;

△x _i , the search radius of cooling channel 1;

J, the center of the cross section of the cooling channel 2;

R _k , the search radius of cooling channel 2;

△x _k , the distance moved by the center line of cooling channel 2;

1000, a device for generating cooling flow channels;

1010, get the unit;

1020, adjustment unit;

1100, device for generating cooling flow channels;

1101, memory;

1102, processor;

1103, communication interface;

1104, bus.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the specific examples in this specification are only to help those skilled in the art better understand the embodiments of the present application, but are not intended to limit the scope of the embodiments of the present application.

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of each process does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be determined by the execution order of the embodiments of the present application. The implementation process constitutes no limitation.

It should also be understood that the various implementations described in this specification can be implemented individually or in combination, which is not limited by the embodiments of the present application.

Unless otherwise stated, all technical and scientific terms used in the embodiments of this application have the same meanings as commonly understood by those skilled in the technical field of this application. The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit the scope of this application.

In the process of manufacturing molds, such as the injection molding process and the die-casting process based on metal materials, the mold temperature directly affects the quality and production efficiency of the final product. In order to meet the mold temperature requirements of these processes, a cooling system needs to be designed to cool the mold. Designing cooling channels is currently the most commonly used cooling method in mold design, which uses the fluid contained in the cooling channels to cool the mold.

Usually, the cooling time of the mold accounts for up to 70% of the production cycle of the product. The main reason is that in traditional mold manufacturing, due to limitations of the processing technology, the cooling flow channel can only be designed and produced as a linear cooling flow close to the mold. The cooling effect of linear cooling channels is slow and uneven. It can be seen that the cooling time directly affects the production cycle to a large extent. The reduction of the production cycle can greatly improve production efficiency, reduce manufacturing costs, and increase the profits of mold companies.

In order to improve the cooling effect, conformal cooling technology has emerged, that is, the cooling flow channel changes according to the change of the product shape. The cooling flow channels generated using conformal cooling technology can be called conformal cooling flow channels or conformal cooling water channels. For convenience of description, they will be collectively referred to as conformal cooling channels in the following text. Conformal cooling can achieve uniform cooling, reduce cooling time, and has strong applicability.

The additive manufacturing (AM) (commonly known as 3D printing) process is a process that is based on digital model files and uses adhesive materials such as powdered metal or plastic to construct objects by printing layer by layer. AM processes are usually implemented using digital technology material printers and are often used to create models in fields such as mold manufacturing and industrial design.

The AM process has great advantages in forming complex structures. Because it gets rid of the forming restrictions of traditional processing, it allows the conformal cooling channels of complex structures to be transformed from design to reality. Figure 1 shows a schematic diagram of a mold including conformal cooling channels manufactured using the AM process.

However, in the process of using the AM process to generate conformal flow channels, the currently commonly used method is to constantly modify the geometric shape and other parameters of the conformal cooling flow channels manually, which results in a long time and a large workload. .

Based on this, embodiments of the present application propose a method for generating cooling flow channels, which can effectively reduce the time and workload of generating cooling flow channels.

FIG. 2 shows a schematic flowchart of a method 200 for generating cooling flow channels according to an embodiment of the present application. Method 200 may include at least some of the following.

It should be understood that the method 200 can be implemented using, but is not limited to, AM processes.

In step 210, input parameters including geometric functional constraints and process constraints are obtained. Among them, the geometric functional restrictions include at least one of the following: smoothness of the cooling flow channels, tangency of the cooling flow channels, non-intersection between the cooling flow channels, and non-intersection between the cooling flow channels and obstacles. , the process constraints include at least one of the following: the construction direction of the cooling runner, the minimum overhang angle, and the maximum allowable diameter of the cooling runner.

In step 220, the initial state of the cooling flow channel is obtained.

In step 230, the initial state is adjusted according to the input parameters to obtain the cooling flow channel.

The cooling flow channels may be, but are not limited to, conformal cooling flow channels.

Optionally, the smoothness of the cooling flow channel can be understood as: at the corners, the cooling flow channel is arc-shaped, avoiding the use of right angles for transition. As shown in Figure 3, at the corner of the upper picture, the cooling channel is at right angles, which does not meet the smoothness requirements; at the corner of the lower picture, the cooling channel is arc-shaped, which meets the smoothness requirements.

As shown in Figure 4, the left picture in Figure 4 does not meet the requirements of tangency, while the right picture meets the requirements of tangency.

Optionally, non-intersection can be understood as: the cooling flow channel does not intersect with other cooling flow channels or obstacles within the outer wall surface of the design space used to generate the cooling flow channel. The intersection mentioned here includes partial intersection or full intersection. For example, as shown in Figure 5, the cooling channel in the left picture partially intersects with other channels and does not meet the non-intersection requirements, while the cooling channel in the right picture meets the non-intersection requirements.

Obstacles can be, for example, guide holes, process holes, etc. in the mold.

Alternatively, the overhang angle can be understood as: the angle between the overhang surface and the bottom plate used when generating the cooling flow channel.

During the generation of cooling channels, the minimum overhang angle may be different if different materials are used. That is, the minimum overhang angle can change as the material changes.

Alternatively, the minimum overhang angle can be obtained by technicians based on experimental data.

Similar to the minimum overhang angle, the maximum allowable diameter can also be obtained by technicians based on experimental data. When generating different cooling flow channels, the maximum allowable diameters may be the same or different, which is not specifically limited in the embodiments of this application.

In the embodiment of the present application, the initial state of the cooling flow channel may include, but is not limited to, the initial centerline of the cooling flow channel and the initial cross-section of the cooling flow channel.

Referring again to Figures 3 and 4, the initial centerline of the cooling flow channel may be composed of multiple points. Referring again to Figure 5, the initial cross-section of the cooling flow channel may include a circular cross-section. Of course, the initial cross-section may also include a non-circular cross-section, such as a teardrop-shaped cross-section, which is not specifically limited in the embodiments of the present application.

In a possible embodiment, the initial state may include an initial centerline of the cooling flow channel. At this time, step 230 may specifically include: determining whether the initial centerline meets the geometric function restrictions. If the initial centerline does not meet the geometric function restrictions, move the initial centerline until the moved initial centerline meets the geometric function restrictions.

It should be understood that since the initial centerline is composed of multiple points, moving the initial centerline can also be understood as moving at least some of the multiple points.

In the embodiment of the present application, the initial center line may include an initial inlet center line and an initial outlet center line. The initial inlet center line corresponds to the entrance of the cooling flow channel (“0” in Figures 3 and 4), and the initial outlet center line The line corresponds to the outlet of the cooling channel (“1” in Figures 3 and 4).

If the geometric function constraints include smoothness and/or tangency, then move the initial centerline until the moved initial centerline meets the geometric function constraints. Specifically, this may include: gradually moving the initial entrance in the direction of the tangent vector of the initial entrance centerline. centerline, and gradually move the initial outlet centerline toward the direction of the tangent vector of the initial outlet centerline until the first normal vector and the second normal vector are aligned, and the first normal vector is the tangent vector of the moved initial centerline in the cooling flow The normal vector of the cross-section at the entrance of the cooling channel, and the second normal vector is the normal vector of the cross-section at the exit of the cooling flow channel after the tangent vector of the moved initial centerline. Among them, in the process of moving the initial entrance center line and the initial exit center line, other initial center lines of the initial center line move with the movement of the initial entrance center line and the initial exit center line, and the other initial center lines are the divisions of the initial center line. Lines other than the initial entrance centerline and the initial exit centerline.

It can be seen from Figures 3 and 4 that in the process of moving the initial entrance centerline and the initial exit centerline, the angle between the initial entrance centerline and its tangent vector is gradually decreasing. Similarly, the initial exit centerline The angle between it and its tangent vector is also gradually decreasing.

It should be noted that during the process of moving the initial center line, the movement can also be based on the normal vector.

In the embodiment of this application, the fluid contained in the cooling channel for cooling the mold is called cooling medium or cooling fluid. Among them, the cooling medium can be circulated to achieve better cooling effect. Specific examples of the cooling medium include water, a mixture of water and ethylene glycol, and the like.

If the cooling flow channel satisfies smoothness, the fluidity of the cooling medium will be relatively better, which can effectively improve the cooling effect of the cooling medium in the cooling flow channel. The tangency of the cooling flow channel is ultimately for the smoothness of the cooling flow channel. Therefore, making the cooling flow channel meet the tangency can also effectively improve the cooling effect of the cooling medium. Therefore, in this technical solution, when the initial center line does not satisfy smoothness and/or tangency, the initial center line is moved until the moved initial center line satisfies smoothness and/or tangency. In this way, the cooling effect of the adjusted cooling flow channel can be improved to a great extent.

Furthermore, by moving the initial center line through the above technical solution, it is not only simple to implement, but also can quickly make the initial center line satisfy smoothness and/or tangency.

In addition to the initial centerline, the initial state of the cooling flow channel may also include an initial cross-section of the cooling flow channel.

In one implementation, if the geometric function includes non-intersection between cooling flow channels, the input parameter may also include a search radius of the cooling flow channels.

It should be noted that the search radius in the embodiment of the present application is not an absolute value. Assuming that the search radius is set to A, if the search radius of a certain cooling channel satisfies A±a%, it can be considered that the search radius of the cooling channel is also A.

In this case, determining whether the initial centerline satisfies the geometric function restriction may specifically include: if the first distance is smaller than the second distance, it may be determined that the cooling flow channel does not satisfy non-intersection. Among them, the first distance is the distance between the center of the initial cross section and the center of the cross section of other cooling flow channels except the cooling flow channel, and the second distance is the search radius of the cooling flow channel and the search of other cooling flow channels. sum of radii.

As shown in the left diagram of Figure 6 , it is assumed that the cooling flow channel to be generated by the embodiment of the present application (hereinafter referred to as the target cooling flow channel for the convenience of description) is cooling flow channel 1, and the other cooling flow channels are cooling flow channel 2. The initial cross-section of cooling channel 1 and the cross-section of cooling channel 2 are both circular cross-sections. The center of the initial cross-section of cooling channel 1 is i and the search radius is R _i . The cross-section of cooling channel 2 is The center is j and the search radius is R _k . As can be seen from the left figure, the distance between center i and center j is less than the sum of Ri and Rk. Therefore, it can be determined that the initial center line of cooling channel 1 does not satisfy non-intersection.

If the initial centerline of the target cooling channel does not satisfy non-intersection, the initial centerline of the target cooling channel can be moved. Specifically, the initial center of the target cooling flow channel can be moved in the direction of a line connecting the center of the initial cross section of the target cooling flow channel and the center of the cross section of other cooling flow channels, and in a direction away from the other cooling flow channels. line until the first distance is greater than or equal to the second distance.

Alternatively, the initial centerline of the target cooling flow channel may be moved in the direction of the line connecting the center of the initial cross section of the target cooling flow channel and the center of the cross section of other cooling flow channels, and in the direction away from the other cooling flow channels. At the same time, move the center lines of other cooling channels in a direction away from the target cooling channel until the first distance is greater than or equal to the second distance.

Alternatively, the center lines of other cooling flow channels can be moved in the direction of the line connecting the center of the initial cross-section of the target cooling flow channel and the center of the cross-section of other cooling flow channels, and in the direction away from the target cooling flow channel, Until the first distance is greater than or equal to the second distance.

For example, continuing to refer to Figure 6, in the case where the cooling flow channel 1 and the cooling flow channel 2 partially intersect, the line along the center i of the initial cross section of the cooling flow channel 1 and the center j of the cross section of the cooling flow channel 2 In the direction of , the center line of the cooling channel 2 is moved by a distance of Δx _k in the direction away from the cooling channel 1, and the initial center line of the cooling channel 1 is moved by Δ in the direction away from the cooling channel 2. The distance between x _i until the distance between center i and center j is equal to the sum of R _i and R _k .

In another implementation, if the geometric function includes non-intersection between the cooling flow channel and the obstacle, the input parameter may also include the search radius of the cooling flow channel.

In this case, determining whether the initial centerline satisfies the geometric function constraints may include: based on the direction of the tangent vector of the initial centerline, the distance between the center of the initial cross section and the obstacle from the initial centerline, and the search radius , determine whether the initial centerline satisfies non-intersection.

Specifically, as shown in the left diagram of Figure 7, along the direction of the tangent vector of the initial centerline, if the third distance is smaller than the search radius of the cooling flow channel, it can be determined that the cooling flow channel partially intersects with the obstacle. Among them, the third distance is the distance between the center of the initial cross-section and the closest boundary of the obstacle to the initial centerline along the direction of the tangent vector.

Alternatively, as shown in the left diagram of Figure 8, along the direction opposite to the tangent vector of the initial centerline, if the fourth distance is greater than the search radius of the cooling flow channel, it can be determined that the cooling flow channel and the obstacle all intersect. The fourth distance is the distance between the center of the initial cross-section and the nearest boundary of the obstacle from the initial centerline in the opposite direction to the tangent vector.

If the cooling flow channel partially intersects with the obstacle, continue to refer to Figure 7 and move the initial centerline in the direction opposite to the tangent vector and away from the obstacle until the third distance is greater than or equal to the search radius.

If the cooling flow channel intersects with all obstacles, and continue to refer to Figure 8, the initial centerline can be moved in the opposite direction to the tangent vector of the initial centerline and in the direction away from the obstacle until the third distance is greater than or equal to the search radius.

It should be noted that during the process of moving the initial center line, the movement can also be based on the tangent vector.

In the above technical solution, since the non-intersection can ensure that there is no interference between the cooling flow channel and the obstacle, therefore, by moving the initial center line of the cooling flow channel, there will be no interference between the cooling flow channel and the obstacle, so that it can Ensure the fluidity of the cooling medium in the cooling flow channel, so that the cooling medium can achieve better cooling effect.

Furthermore, the geometric functional constraints may also include the design space of the cooling flow channel, and the design space defines the space allowed for generating the cooling flow channel. Optionally, the design space can be input by the user in advance.

In another possible embodiment, as an example, the initial state may include the initial cross-section of the cooling flow channel, and the process limit may include the initial diameter value and the maximum allowable diameter of the cooling flow channel.

In this case, step 230 may specifically include: if the initial value of the diameter is greater than the maximum allowable diameter, adjusting the shape of the initial cross-section from the first shape to the second shape, where the first shape is a shape with a support structure, and the second shape It is the shape of an unsupported structure (or self-supporting structure).

For example, the shape with a support structure may be a circle, and the shape without a support structure may be a non-circular shape, such as a drop shape or a rhombus shape (or diamond shape).

Optionally, it may be randomly determined which of the second shapes the first shape is specifically adjusted to, such as whether it is adjusted to a water drop shape or a diamond shape.

Optionally, it may be determined which of the second shapes the first shape is specifically adjusted to according to other limitations among the process limitations.

Optionally, it may be determined which of the second shapes the first shape is specifically adjusted to based on other parameters, such as the design space for generating the cooling flow channel, the material used in the AM process, etc.

In addition to the initial cross-section, the initial state can include an initial centerline, and process constraints can include overhang angle minimums and build directions. At this time, step 230 may specifically include: obtaining the first angle, where the first angle is the angle between the tangent vector of the initial center line and the construction direction; if the first angle is less than the minimum overhang angle, change the shape of the initial cross section Adjust from first shape to second shape.

That is to say, if the initial value of the diameter is greater than the maximum allowable diameter, and/or the first angle is less than the minimum overhang angle, the shape of the initial cross-section can be adjusted from the first shape to the second shape.

Since if the initial value of the diameter is greater than the maximum allowable diameter, and or, the first angle is less than the minimum overhang angle, it is necessary to add a support structure to the cooling runner and connect it to the overhang surface. However, these support structures often have to be removed during subsequent processing, adding additional effort and cost. And usually, due to the large number and complex shape of the cooling channels, these support structures may not be removed at all during subsequent processing. Therefore, when the initial value of the diameter is greater than the maximum allowable diameter, and or, the first angle is less than the minimum overhang angle, adjusting the shape of the cross-section from a supported structure to a self-supporting structure can avoid the problem in the cooling runner. The problem of adding support structures eliminates the need to move the additional support structures during subsequent processing, effectively reducing the workload, cost and time of generating cooling flow channels.

In addition, if the initial value of the diameter is less than or equal to the maximum allowable diameter, and the first angle is greater than or equal to the minimum overhang angle, the initial cross section does not need to be adjusted.

As another example, process constraints may include a construction direction of the cooling flow channel, and the initial state may include an initial cross-section of the cooling flow channel. In this case, step 230 may specifically include: if the build direction changes, the initial cross-section may be adjusted according to other parameters of process constraints other than the build direction.

For example, if the build direction changes, the initial cross-section can be adjusted based on the maximum allowable diameter of the cooling runner and the initial diameter of the cooling runner. As shown in Figure 9, the initial cross-section of the cooling runner is circular. At a certain moment, the construction direction of the cooling runner changes, and the circular cross-section is changed according to other parameters of the process limits except the construction direction. The cross section is adjusted to a diamond cross section.

Optionally, in the implementation of this application, it can be determined in real time whether the construction direction has changed.

Optionally, it can be determined whether the construction direction has changed every preset time period, such as 10ms.

Optionally, the time intervals between multiple determinations of whether the construction direction has changed may be different. For example, the time interval between the first time to determine whether the building direction has changed and the second time to determine whether the building direction has changed is 3ms, the second time to determine whether the building direction has changed, and the third time to determine whether the building direction has changed. The time interval between changes is 5ms.

Further, in addition to the above-mentioned input parameters, the method 200 may also include: obtaining a route pattern of the cooling flow channel.

There are many types of cooling runner routes. For example, the route pattern of the cooling runner can be zigzag, spiral, scaffolding pattern or Voronoi diagram, etc.

Alternatively, the route pattern of the cooling channels may be determined according to the shape of the mold.

Optionally, the route pattern of the cooling runner can be determined according to the specific requirements for cooling the mold.

Optionally, the route pattern of the cooling flow channel may be determined based on the design space of the cooling flow channel.

Further, the method 200 may also include: after adjusting the initial state of the cooling flow channel, if the adjusted initial state satisfies the geometric function constraints and process constraints, the cooling flow channel may be generated according to the adjusted initial state.

Continuing to refer to Figure 9, the initial cross section and the initial center line in Figure 9 are both adjusted, and the final cooling flow channel can be generated based on the initial center line and initial cross section in Figure 9.

In the embodiment of the present application, geometric functional constraints including at least one of smoothness, tangency and non-intersection of the cooling flow channel are obtained, and at least one of the construction direction, minimum overhang angle and maximum allowable diameter of the cooling flow channel is obtained. kind of process constraints. In this way, the initial state of the cooling flow channel can be automatically adjusted according to the obtained geometric function constraints and process constraints, thereby effectively reducing the time and workload of generating the cooling flow channel. . Furthermore, since the smoothness, tangency, non-intersection with obstacles, construction direction, minimum overhang angle and maximum allowable diameter of the cooling flow channel are closely related to the cooling effect of the cooling flow channel, therefore, according to These parameters adjust the initial state of the cooling flow channel, so that the generated cooling flow channel has a better cooling effect and can meet the design requirements to a large extent.

The method embodiments of the embodiments of the present application are described in detail above. The device embodiments of the embodiments of the present application are described below. The device embodiments and the method embodiments correspond to each other. Therefore, the parts not described in detail can be referred to the previous method embodiments and device embodiments. Any possible implementation of the above methods can be implemented.

Figure 10 shows a schematic block diagram of a device 1000 for generating cooling flow channels according to an embodiment of the present application. The device 1000 for generating a cooling flow channel can execute the method 200 for generating a cooling flow channel in the embodiment of the present application.

As shown in Figure 10, the device 1000 for generating cooling flow channels includes:

Obtaining unit 1010 is used to obtain input parameters, which include geometric functional limitations and process limitations, wherein the geometric functional limitations include at least one of the following: smoothness of the cooling flow channel, tangency of the cooling flow channel, and cooling Non-intersection between flow channels and obstacles, process constraints include at least one of the following: construction direction of the cooling flow channel, minimum overhang angle, and maximum allowable diameter of the cooling flow channel.

The acquisition unit 1010 is also used to acquire the initial state of the cooling flow channel.

The adjustment unit 1020 is used to adjust the initial state according to the input parameters to obtain the cooling flow channel.

Figure 11 is a schematic diagram of the hardware structure of a device 1100 for generating cooling flow channels according to an embodiment of the present application. Device 1100 includes memory 1101, processor 1102, communication interface 1103, and bus 1104. Among them, the memory 1101, the processor 1102, and the communication interface 1103 implement communication connections between each other through the bus 1104.

The memory 1101 may be a read-only memory (ROM), a static storage device, and a random access memory (RAM). The memory 1101 can store a program. When the program stored in the memory 1101 is executed by the processor 1102, the processor 1102 and the communication interface 1103 are used to execute various steps of the method for generating a cooling flow channel according to the embodiment of the present application.

The processor 1102 may be a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), a graphics processing unit (GPU), or one or more The integrated circuit is used to execute relevant programs to implement the functions required to be performed by the units in the device of the embodiment of the present application, or to execute the method of generating a cooling flow channel in the embodiment of the present application.

The processor 1102 may also be an integrated circuit chip with signal processing capabilities. During the implementation process, each step of the method for generating a cooling flow channel in the embodiment of the present application can be completed by instructions in the form of hardware integrated logic circuits or software in the processor 1102.

The above-mentioned processor 1102 can also be a general-purpose processor, a digital signal processor (digital signal processing, DSP), an ASIC, an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

The communication interface 1103 uses a transceiver device such as but not limited to a transceiver to implement communication between the device 1100 and other devices or communication networks.

Bus 1104 may include a path that carries information between various components of device 1100 (eg, memory 1101, processor 1102, communication interface 1103).

It should be noted that although the above-mentioned device 1100 only shows a memory, a processor, and a communication interface, during specific implementation, those skilled in the art will understand that the device 1100 may also include other devices necessary for normal operation. At the same time, based on specific needs, those skilled in the art should understand that the device 1100 may also include hardware devices that implement other additional functions. In addition, those skilled in the art should understand that the device 1100 may only include components necessary to implement the embodiments of the present application, and does not necessarily include all components shown in FIG. 11 .

Embodiments of the present application also provide a computer-readable storage medium that stores program code for device execution, where the program code includes instructions for executing the steps in the method of generating a cooling flow channel.

Embodiments of the present application also provide a computer program product. The computer program product includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, The computer executes the above method of generating a cooling flow channel.

The above-mentioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the device described above can be referred to the corresponding process in the foregoing method embodiment, and will not be described again here.

The above are only specific implementation modes of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any person familiar with the technical field can easily implement the implementation within the technical scope disclosed in the embodiments of the present application. Any changes or substitutions that come to mind should be included in the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

A method (200) for generating cooling flow channels, characterized in that the method includes:

Obtain (210) input parameters, the input parameters include geometric functional limitations and process limitations, wherein the geometric functional limitations include at least one of the following: smoothness of the cooling flow channel, tangency of the cooling flow channel, cooling Non-intersection between flow channels and non-intersection between cooling flow channels and obstacles, the process limitations include at least one of the following: the construction direction of the cooling flow channels, the minimum overhang angle and the The maximum allowable diameter of the cooling flow channel;

Obtain the initial state of the cooling flow channel in (210);

According to the input parameters, the initial state is adjusted (220) to obtain the cooling flow channel.
The method (200) according to claim 1, wherein the initial state includes an initial centerline of the cooling flow channel, and the initial state is adjusted according to the input parameters (220), To obtain the cooling flow channel, including:

determining whether the initial centerline satisfies the geometric functional constraints;

If the initial centerline does not meet the geometric function restriction, the initial centerline is moved until the moved initial centerline meets the geometric function restriction.
The method (200) according to claim 2, wherein the initial center line includes an initial inlet center line and an initial outlet center line, the initial inlet center line corresponds to the inlet of the cooling flow channel, and the The initial outlet centerline corresponds to the outlet of the cooling flow channel, the geometric functional limitations include the smoothness and/or the tangency, and the moving of the initial centerline until the moved initial center Lines meet the geometric functional constraints described, including:

The initial inlet centerline is gradually moved in the direction of the tangent vector of the initial inlet centerline, and the initial outlet centerline is gradually moved in the direction of the tangent vector of the initial outlet centerline until the first normal vector and the first normal vector are Two normal vectors are aligned, the first normal vector is the normal vector of the cross section of the moved tangent vector of the initial centerline at the entrance of the cooling flow channel, and the second normal vector is the moved The tangent vector of the initial centerline is the normal vector of the cross-section at the outlet of the cooling flow channel;

Wherein, in the process of moving the initial entrance center line and the initial exit center line, other initial center lines of the initial center line move with the movement of the initial entrance center line and the initial exit center line, The other initial center lines are other lines of the initial center line except the initial inlet center line and the initial outlet center line.
The method (200) according to claim 2 or 3, characterized in that the initial state further includes an initial cross-section of the cooling flow channels, and the geometric functional constraints include non-intersection between the cooling flow channels. property, the input parameters also include the search radius of the cooling flow channel;

Determining whether the initial centerline meets the geometric function constraints includes:

If the first distance is less than the second distance, it is determined that the initial centerline does not satisfy the non-intersection;

The moving of the initial centerline until the moved initial centerline meets the geometric function constraints includes:

Move the initial center along the direction of the line connecting the center of the initial cross-section and the center of the cross-section of other cooling flow channels except the cooling flow channel, and in the direction away from the other cooling flow channels. line until the first distance is greater than or equal to the second distance;

Wherein, the first distance is the distance between the center of the initial cross-section and the center of the cross-section of the other cooling flow channels, and the second distance is the distance between the search radius of the cooling flow channel and the other cooling flow channels. The sum of the search radii of the cooling channels.
The method (200) according to any one of claims 2 to 4, characterized in that the initial state further includes an initial cross-section of the cooling flow channel, and the geometric functional constraints include the relationship between the cooling flow channel and Non-intersection between obstacles, the input parameters also include the search radius of the cooling flow channel, and determining whether the initial centerline meets the geometric function constraints includes:

According to the direction of the tangent vector of the initial centerline, the distance between the center of the initial cross-section and the obstacle from the initial centerline, and the search radius, it is determined whether the initial centerline satisfies the requirements. Describe non-intersection.
The method (200) according to claim 5, characterized in that the distance between the direction of the tangent vector according to the initial centerline, the center of the initial cross-section and the distance between the obstacle and the initial centerline distance, and the search radius, determine whether the initial centerline satisfies the non-intersection, including:

Along the direction of the tangent vector of the initial centerline, if the third distance is smaller than the search radius of the cooling flow channel, it is determined that the cooling flow channel partially intersects with the obstacle, and the third distance is along the tangent direction. The direction of the vector, the distance between the center of the initial cross-section and the closest boundary of the obstacle to the initial centerline; or,

Along the direction opposite to the tangent vector of the initial centerline, if the fourth distance is greater than the search radius of the cooling flow channel, it is determined that the cooling flow channel and the obstacle all intersect, and the fourth distance is along the In the opposite direction of the tangent vector, the distance between the center of the initial cross-section and the closest boundary of the obstacle to the initial centerline.
The method (200) according to claim 6, wherein said moving the initial centerline until the moved initial centerline meets the geometric function constraints includes:

If the cooling flow channel partially intersects the obstacle, move the initial centerline in the direction opposite to the tangent vector and away from the obstacle until the third distance is greater than or equal to The search radius;

If the cooling flow channel and the obstacle all intersect, move the initial centerline in the direction opposite to the tangent vector of the initial centerline and in the direction away from the obstacle until the third distance is greater than Or equal to the search radius, the third distance is the distance between the center of the initial cross-section and the closest boundary of the obstacle to the initial centerline in the direction of the tangent vector.
The method (200) according to any one of claims 1 to 7, characterized in that the initial state includes an initial cross-section of the cooling flow channel, and the process limit includes an initial diameter of the cooling flow channel. value and the maximum allowable diameter, and adjusting the initial state according to the input parameters (220), including:

If the initial value of the diameter is greater than the maximum allowable diameter, adjust the shape of the initial cross-section from a first shape to a second shape, where the first shape is a shape with a support structure, and the second shape is a shape without a support structure. The shape of the supporting structure.
The method (200) according to any one of claims 1 to 8, characterized in that the initial state includes an initial cross-section and an initial centerline of the cooling flow channel, and the process limit includes the overhang angle. minimum value and the construction direction, and adjusting the initial state according to the input parameters (220), including:

Obtain a first angle, which is the angle between the tangent vector of the initial centerline and the construction direction;

If the first angle is less than the minimum overhang angle, the shape of the initial cross-section is adjusted from the first shape to the second shape, the first shape is a shape with a support structure, and the second shape is Shape without supporting structure.
The method (200) according to any one of claims 1 to 9, characterized in that the process constraints include a construction direction of the cooling flow channel, and the initial state includes an initial cross-section of the cooling flow channel. , adjusting the initial state according to the input parameters (220), including:

If the build direction changes, the initial cross-section is adjusted based on other parameters of the process constraints in addition to the build direction.
The method (200) according to any one of claims 1 to 10, characterized in that the cooling flow channel is a conformal cooling flow channel.
A device (1100) for generating cooling flow channels, characterized by including:

Acquisition unit (1110), used to acquire input parameters, the input parameters including geometric functional limitations and process limitations, wherein the geometric functional limitations include at least one of the following: smoothness of the cooling flow channel, smoothness of the cooling flow channel, Tangency, non-intersection between cooling channels, and non-intersection between cooling channels and obstacles. The process constraints include at least one of the following: construction direction of the cooling channels, overhang angle minimum and maximum allowable diameters of said cooling channels;

The acquisition unit (1110) is also used to acquire the initial state of the cooling flow channel;

An adjustment unit (1120) is used to adjust the initial state according to the input parameters to obtain the cooling flow channel.
A device (1200) for generating cooling flow channels, characterized by including:

Memory (1201), used to store programs;

A processor (1202) configured to execute a program stored in the memory (1201). When the program stored in the memory (1201) is executed, the processor (1202) is configured to execute a program according to claims 1 to 11. The method for generating cooling flow channels according to any one of the above.
A computer-readable storage medium, characterized in that the computer-readable medium stores program code for device execution, the program code includes a method for performing the generation cooling method according to any one of claims 1 to 11 Instructions for the steps in the runner method.