Modeling method, recording medium and system for water outlet hole of mold bottom plate casting

Abstract

The invention belongs to the technical field of mold design, and particularly relates to a mold bottom plate casting water outlet hole modeling method which comprises the steps that a bottom face datum plane is created and intersects with a mold bottom plate entity to obtain a maximum contour line; in the defined range, a plane perpendicular to the datum plane is screened out from all casting faces in the mold bottom plate entity; uniformly filtering out planes which are not suitable for forming water holes to obtain alternative punching surfaces; a water outlet hole is preset in the position close to the bottom line of the face and the side intersecting line where the lower angular point is located, and only when a supporting rib plate is arranged behind the perforated face at the position of the preset water outlet hole, the position of the preset water outlet hole is moved in the direction capable of avoiding the supporting rib plate on the periphery. According to the method, the unified modeling work of the multiple water outlet holes in the mold bottom plate casting is processed in batches through standardized condition setting, and the design period is greatly shortened. The invention also provides a non-transitory readable recording medium storing a program of the modeling method for the water outlet hole of the mold bottom plate casting and a device comprising the medium, and the program can be called through a processing circuit so as to execute the method.

Description

Technical Field

[0001] This invention belongs to the field of stamping die design technology, and discloses a method for modeling water outlet holes in die base plate castings, and stores a recording medium and system capable of executing the method program. Background Technology

[0002] Stamping of automotive body panels is inseparable from molds, which are essential tooling for stamped parts. The most time-consuming part of mold design is the design of castings, including the design of large castings such as upper base plates, lower base plates, pressure rings, and ejectors, which accounts for more than 60% of the total mold design workload. According to design standards, we usually need to design 50 mm diameter drainage holes on the ribs at the bottom of the mold casting cavity for the drainage of cutting fluid during the machining of the mold surface and the drainage of wastewater during the storage and cleaning of the mold. Therefore, drainage holes must be designed for every mold.

[0003] The design of the water outlet in the casting has the following problems: It takes a long time: the bottom plate of a mold has 30-200 water outlet holes alone. If designed manually, it would take 1 hour. The design of water outlet holes in castings takes up the designer's design time.

[0004] The design of water outlet holes needs to meet certain requirements and must comply with design standards. For new designs, it is necessary to consult design standards, which takes design time. Furthermore, different understandings of the standards can easily lead to errors that do not conform to the design standards. Currently, the company's water outlet design mainly adopts the method of modeling one by one. It requires selecting each face, inputting parameters, and selecting the dimensioned edges to generate the water outlet. The workload is huge, and it takes dozens of selections to complete. Summary of the Invention

[0005] To address the above problems, this invention provides a method for modeling the water outlet holes of a mold base plate casting, the specific solution including the following steps: S1. Obtain the bottom direction vector at the center point of the bottom surface, create the bottom reference plane based on it, and intersect it with the mold base plate solid to obtain the maximum outline of the bottom surface; S2. Within the range defined by the maximum contour line, select planes perpendicular to the reference plane from all casting surfaces in the mold base plate entity; filter out planes not connected to the bottom surface and planes connected to the maximum contour line of the bottom surface; filter out machined planes and broken surfaces; filter out planes with existing water outlet holes and planes whose height is less than the minimum height of the drilling surface or whose width is less than the minimum width of the drilling surface. S3. Obtain the thickness of the stiffening plate containing the remaining surface; retain the surface corresponding to the stiffening plate with a thickness of less than 50mm as the alternative drilling surface; S4. The candidate perforated surface intersects with the bottom and side adjacent plates to form two corner points and two vertical intersection lines, so that the projection of the preset water outlet on the candidate perforated surface is tangent to the line connecting the two corner points; if the two corner points are not at the same height, the projection of the preset water outlet on the candidate perforated surface is also tangent to the vertical intersection line including the lower corner point. S5. If there is a supporting rib behind the perforated surface at the preset water outlet, move the position of the preset water outlet to the surrounding area in a direction that can avoid the supporting rib. Otherwise, do not move it to complete the model construction of the preset water outlet.

[0006] Preferably, the direction of movement is horizontal.

[0007] Preferably, the model is selected where the direction of horizontal movement is from the lower corner point to the higher corner point, and the movement stops when the projections of the preset water outlet and the supporting rib on the candidate drilling surface do not intersect.

[0008] Another aspect of the present invention is to provide a non-transient readable recording medium for storing one or more programs containing multiple instructions, which, when executed, cause the processing circuit to perform the above-described method for modeling water outlet holes in a mold base plate casting.

[0009] Another aspect of the present invention provides a system for modeling water outlet holes in a mold base plate casting, including a processing circuit and a memory electrically coupled thereto. The memory is configured to store at least one program, the program containing multiple instructions. The processing circuit runs the program and can execute the above-described method for modeling water outlet holes in a mold base plate casting.

[0010] Compared with existing technologies, this invention develops key step algorithms through integrated design standards, thereby achieving intelligent design of casting water outlet holes, reducing repetitive work, significantly shortening the design time of casting water outlet holes, improving the standardization of casting water outlet hole design, and reducing the design cost of casting water outlet holes. The specific advantages are summarized as follows: The perforated surface of the water outlet hole in the casting is automatically filtered, and the position is automatically determined to avoid manual selection; The operation steps are few; once you enter the menu, it's basically a one-step process. It's fast; all 110 water outlets can be completed in one minute. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the reference plane in an embodiment of the present invention; Figure 2 This is a schematic diagram of the vertical surfaces that need to be filtered out in this embodiment of the invention, which are not connected to the bottom surface. Figure 3 This is a schematic diagram showing the relationship between the water outlet, corner points, and intersection lines in an embodiment of the present invention; Figure 4This is a schematic diagram of a candidate perforated surface having a supporting rib plate on the back side in an embodiment of the present invention; Where a is a schematic diagram with vertical ribs, and b is a schematic diagram with diagonal ribs; In the diagram, DIR is the bottom direction vector; C is the bottom center point; DP is the bottom reference plane; CE is the bottom maximum contour line; PT1 is the first corner point; PT2 is the second corner point; L is a straight line; PT is the tangent point; and PT0 is the center point of the circle. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without innovative effort are within the scope of protection of the present invention.

[0013] The following example illustrates the modeling process of a 50mm diameter water outlet hole in the mold base plate casting of a side panel part, using the design of the water outlet hole in the mold base plate casting of a side panel part trimming and punching die as an example: Obtain the bottom surface direction vector DIR and the bottom surface center point C. Create the bottom surface reference plane DP based on this. Determine whether the bottom plate is the upper or lower plate based on the direction: if the bottom surface direction is the same as the Z-axis direction, it is determined to be the upper plate; otherwise, it is the lower plate. Calculate the maximum contour line CE of the bottom surface. (The following uses the upper plate as an example.) The solid is obtained by selecting the bottom plane. The target and quantity of all faces in the solid are retrieved, and the geometric parameters of each face and its adjacent faces are obtained. Each face is then judged and filtered as follows to obtain the faces that meet the drilling conditions. Other faces (including cylindrical, conical, and curved surfaces) are filtered out, and the plane direction is determined to retain perpendicular planes.

[0014] Determine whether the plane is connected to the base surface and whether it is connected to the maximum outline of the base surface: Filter out planes that are not connected to the bottom surface and planes that are connected to the maximum outline of the bottom surface; To filter out the machined surfaces, the casting surface color number is set to #137, and the machined surface colors are: red #186, blue #211, and yellow #6.

[0015] Filter out surfaces with water outlets. Identify all lines on the surface, excluding the bottom edge lines and lines perpendicular to the bottom edge, leaving only horizontal straight lines. Determine the distance from the bottom edge; if the distance is less than 100mm, filter out this surface. Filter out broken surfaces (only surfaces with two supporting surfaces). Determine the thickness of the reinforcing bar: Using the ray method, draw rays in the opposite direction of the surface to obtain the thickness of the ribs; filter out ribs with a thickness greater than 50mm, and retain rib surfaces with a thickness ≤ 50mm.

[0016] Determine the location of the water outlet: Find all the edges of the surface, filter out all perpendicular lines, and then find the straight line L with the corner point as the lowest point (Z-axis coordinate value of the comparison point) among the remaining horizontal or oblique lines. Find the first corner point PT1 and the second corner point PT2. If the straight line L is a horizontal line, take any endpoint to make a reference point for the water hole; if the straight line L is an oblique line, take the lowest point (here, the first corner point PT1 is used as the reference point for the water hole). Draw a vector V with PT1 and PT2 as the points. With PT1 as the origin, draw a tangent point PT in the direction of vector V (make the distance between PT1 and PT equal to the radius of the water hole 25mm). Draw a center point PT0 upwards (make the distance between PT and PT0 equal to the radius of the water hole 25mm). Generate a water hole (50mm in diameter) with a depth of 50mm with PT0 as the center.

[0017] Determine if the water outlet is in the correct position: There are two situations that need to be correctly identified when water outlet holes are formed on the ribs: There is another vertical rib on the other side of the rib, and the water outlet cannot be drilled on this vertical rib; There is another inclined rib on the other side of the rib. The water outlet cannot be made on the other inclined rib. If it is difficult to avoid it by moving left and right, choose to move the center point upward until it does not interfere with the back support rib plate, and complete the modeling of the water outlet.

[0018] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computers or available storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0019] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1A device that provides the functions specified in one or more boxes.

[0020] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0021] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0022] The technical solution of the present invention is "a non-transitory readable recording medium" by compiling the above methods and steps into a program and storing it on a hard disk or other non-transitory storage medium; and the technical solution of the present invention is "a modeling system for water outlet holes of mold base plate casting" by electrically connecting the storage medium to a computer processor and completing the modeling of water outlet holes of mold base plate casting through data processing.

[0023] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for modeling water outlet holes in a mold base plate casting, characterized in that... Includes the following steps: S1. Obtain the bottom direction vector at the center point of the bottom surface, create the bottom reference plane based on it, and intersect it with the mold base plate solid to obtain the maximum outline of the bottom surface; S2. Within the range defined by the maximum contour line, select planes perpendicular to the reference plane from all casting surfaces in the mold base plate entity; filter out planes not connected to the bottom surface and planes connected to the maximum contour line of the bottom surface; filter out machined planes and broken surfaces; filter out planes with existing water outlet holes and planes whose height is less than the minimum height of the drilling surface or whose width is less than the minimum width of the drilling surface. S3. Obtain the thickness of the stiffening plate containing the remaining surface; retain the surface corresponding to the stiffening plate with a thickness of less than 50mm as the alternative drilling surface; S4. The candidate perforated surface intersects with the bottom and side adjacent plates to form two corner points and two vertical intersection lines, so that the projection of the preset water outlet on the candidate perforated surface is tangent to the line connecting the two corner points; if the two corner points are not at the same height, the projection of the preset water outlet on the candidate perforated surface is also tangent to the vertical intersection line including the lower corner point. S5. If there is a supporting rib behind the perforated surface at the preset water outlet, move the position of the preset water outlet to the surrounding area in a direction that can avoid the supporting rib. Otherwise, do not move it to complete the model construction of the preset water outlet.

2. The method for modeling water outlet holes in a mold base plate casting according to claim 1, characterized in that, The preferred direction of movement is horizontal.

3. The method for modeling water outlet holes in a mold base plate casting according to claim 2, characterized in that, When moving horizontally, the model with the preset water outlet is moved from the lower corner to the higher corner. The movement stops when the projections of the preset water outlet and the supporting rib on the candidate drilling surface do not intersect.

4. A non-transitory readable recording medium for storing one or more programs containing multiple instructions, characterized in that, When the instruction is executed, the processing circuit will perform the method for modeling the water outlet hole of the mold base plate casting according to any one of claims 1-3.

5. A system for modeling water outlet holes in a mold base plate casting, comprising a processing circuit and a memory electrically coupled thereto, characterized in that, The memory is configured to store at least one program, the program containing multiple instructions, and the processing circuit runs the program to execute the method for modeling water outlet holes of a mold base plate casting according to any one of claims 1-3.

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