Space cutter shaft trajectory vector planning method for blisk

Abstract

The invention relates to a space cutter shaft trajectory vector planning method for a blisk, and relates to the technical field of intelligent cutter application planning. The method comprises the following steps: acquiring a target bladed disk model, wherein the target bladed disk model corresponds to a to-be-processed solid workpiece; determining a processing range based on the target bladed disk model; determining a target machining tool corresponding to the target bladed disk model based on the machining range; and based on the target machining cutter, a cutter shaft trajectory vector corresponding to the target blade disc is planned. In the process of tool selection and path planning for machining of a target bladed disc, a target machining tool matched with the target bladed disc is determined in combination with the entity state of a target bladed disc model, and planning of a tool shaft trajectory vector is carried out based on the specific shape of the target machining tool, so that in the machining process of the integral bladed disc, the machining efficiency of the integral bladed disc is improved, and the machining precision of the integral bladed disc is improved. The path of the space cutter shaft is efficiently planned.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent tool application planning, and in particular to a method for planning the spatial tool axis trajectory vector of an integral blade disk. Background Art

[0002] The integral blisk is a new type of structural component designed to meet the needs of high-performance aircraft engines. It integrates the engine rotor blades and the wheel disc into one, eliminating the tenons, mortise and tenon grooves and locking devices in traditional connections, reducing the structural weight and the number of parts, avoiding tenon airflow losses, improving aerodynamic efficiency, and greatly simplifying the engine structure.

[0003] In the related technology, the special structure of the integral blade disk requires its processing to involve the processing of complex spatial surfaces. The related technology will design the processing steps in combination with the product form and processing requirements of the integral blade disk.

[0004] However, the processing step planning in the related art lacks application planning for the spatial tool axis. Summary of the invention

[0005] The present application is about a spatial tool axis trajectory vector planning method for an integral blade disk, which can realize the path planning of the spatial tool axis during the processing of the integral blade disk. The method is applied in a computer device, and the method includes: Acquire a target blade disk model, wherein the target blade disk model corresponds to a physical workpiece to be processed; Determining a processing range based on the target blade disk model; Determining a target machining tool corresponding to the target blisk model based on the machining range; Based on the target machining tool, a tool axis trajectory vector corresponding to the target blade is planned.

[0006] In an optional embodiment, determining the processing range based on the target blade disk model includes: Based on the leading edge limit edge and the trailing edge limit edge corresponding to the target blade disk model; The processing range is determined based on the leading and trailing edge limit edges.

[0007] In an optional embodiment, the leading and trailing edge limit edges corresponding to the target blade disk model include: Determining a rotation axis corresponding to the target blade disk model; The leading edge limit edge and the trailing edge limit edge corresponding to the target blade disk model are determined based on the rotation axis.

[0008] In an optional embodiment, determining a target machining tool corresponding to the target blade disk model based on the machining range includes: Determine a first edge coordinate corresponding to the leading edge limit edge based on the leading edge limit edge; Determine a second edge coordinate corresponding to the trailing edge limit edge based on the trailing edge limit edge; Combining the first edge coordinates and the second edge coordinates to generate a three-dimensional coordinate area of ​​a processing range; Performing coordinate transformation on the three-dimensional coordinate region of the processing range to obtain a two-dimensional coordinate region of the processing range; Determine a candidate tool corresponding to the target blade disk model through the two-dimensional coordinate area of ​​the processing range; Performing interference detection on the candidate tool; Based on the detection result of the interference detection, the candidate tool is determined to be the target machining tool.

[0009] In an optional embodiment, the performing tool detection on the candidate tool includes: Generate a two-dimensional coordinate of a tool corresponding to the candidate tool; Interference detection is performed based on the two-dimensional coordinates of the tool and the two-dimensional coordinates of the processing range.

[0010] In an optional embodiment, planning a tool axis trajectory vector corresponding to the target blade based on the target machining tool includes: In combination with the interpolation method, based on the target machining tool, a tool axis trajectory vector corresponding to the target blade is planned.

[0011] In an optional embodiment, the combined interpolation method is used to plan a tool axis trajectory vector corresponding to the target blade based on the target machining tool. Determine the leading edge limit coordinate point based on the leading edge limit edge; Determine the trailing edge limit coordinate point based on the trailing edge limit edge; Determine a first initial tool axis based on the leading edge limit coordinate point; Determine a second initial tool axis based on the trailing edge limit coordinate point; The interpolation method, the first initial tool axis and the second initial tool axis are combined to plan the tool axis trajectory vector corresponding to the target blade.

[0012] In an optional embodiment, after planning the tool axis trajectory vector corresponding to the target blade based on the target machining tool, the method further comprises: An interference check is performed on the tool axis trajectory vector.

[0013] In an optional embodiment, the interference check on the tool axis trajectory vector includes: Determine the initial tool axis and the rotation axis of the tool axis trajectory vector; An interference check is performed on the tool axis trajectory vector based on the initial tool axis and the rotation axis.

[0014] The beneficial effects of the technical solution provided by this application include at least: In the process of selecting tools and planning paths for machining the target blade disk, the target machining tool suitable for the target blade disk is determined in combination with the physical state of the target blade disk model, and the tool axis trajectory vector is planned based on the specific state of the target machining tool, thereby achieving efficient planning of the path of the spatial tool axis during the machining of the entire blade disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic flow chart of a method for planning a space tool axis trajectory vector of an integral blade disk provided by an exemplary embodiment of the present application is shown.

[0017] Figure 2 A schematic flow chart of another method for planning the spatial tool axis trajectory vector of an integral blade disk provided by an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0019] First, the technical terms appearing in the embodiments of the present application are explained: The integral blade disk is a new type of structural component designed to meet the needs of high-performance aircraft engines. It integrates the engine rotor blades and the wheel disk, eliminating the tenon, mortise and tenon groove and locking device in the traditional connection, reducing the structural weight and the number of parts, avoiding the airflow loss of the tenon, improving the aerodynamic efficiency, and greatly simplifying the engine structure. It has now been widely used in military and civil aircraft engines in various countries. In related technologies, the structural design of the integral blade disk is relatively complex. When using intelligent tools for processing, it is necessary to preset and determine the trajectory route according to the actual state of the blade disk.

[0020] Figure 1 A schematic flow chart of a method for planning a space tool axis trajectory vector of an integral blade disk provided by an exemplary embodiment of the present application is shown. The method is described by taking the application of the method in a computer device as an example. The method includes: Step 101, obtaining a target blade disk model.

[0021] In the embodiment of the present application, the target blade disk model corresponds to a physical workpiece to be processed. The computer device can perform blade disk modeling by acquiring the physical workpiece to be processed corresponding to the target blade disk.

[0022] Step 102 : determining a processing range based on a target blade disk model.

[0023] This process is a process of determining the processing range of the target blade disk. Optionally, the processing range corresponds to the edge range of the target blade disk, or the processing range corresponds to at least one area range in the target blade disk.

[0024] Step 103 : determining a target machining tool corresponding to the target blade disk model based on the machining range.

[0025] In the embodiment of the present application, the target machining tool is also implemented in the computer device as a tool model configured with parameters.

[0026] Step 104 , planning a tool axis trajectory vector corresponding to the target blade based on the target machining tool.

[0027] In an embodiment of the present application, the tool axis trajectory vector is used to characterize the processing path of the tool on the target blade disk. Optionally, the processing path includes a processing starting point, a processing focus, and a path direction.

[0028] On this basis, Figure 2 A schematic flow chart of another method for planning the space tool axis trajectory vector of an integral blade disk provided by an exemplary embodiment of the present application is shown. The method is described by taking the application of the method in a computer device as an example. The method includes: Step 201, obtaining a target blade disk model.

[0029] This process corresponds to step 101 and will not be described in detail here.

[0030] Step 202 : Based on the leading edge limit edge and the trailing edge limit edge corresponding to the target blade disk model.

[0031] Optionally, in this process, a rotation axis corresponding to the target blade disk model is determined, and a leading edge limit edge and a trailing edge limit edge corresponding to the target blade disk model are determined based on the rotation axis.

[0032] Step 203, determining the processing range based on the leading and trailing edge limit edges.

[0033] That is, in the embodiment of the present application, the processing range is located between the front and rear edge limit edges.

[0034] Step 204 : determining a first edge coordinate corresponding to the leading edge limit edge based on the leading edge limit edge.

[0035] Step 205 : determining a second edge coordinate corresponding to the trailing edge limit edge based on the trailing edge limit edge.

[0036] Steps 204 to 205 are the coordinate system transformation process corresponding to the leading and trailing edge limit edges. In this case, the coordinates of the leading and trailing edge limit edges are three-dimensional coordinates.

[0037] Step 206 , combining the first edge coordinates and the second edge coordinates to generate a three-dimensional coordinate region of the processing range.

[0038] Step 207, coordinate conversion is performed on the three-dimensional coordinate region of the processing range to obtain a two-dimensional coordinate region of the processing range.

[0039] After determining the three-dimensional space, the limit edge is projected into the two-dimensional plane for subsequent processing.

[0040] Step 208 : determining a candidate tool corresponding to the target blade disk model through the two-dimensional coordinate region of the machining range.

[0041] In the embodiment of the present application, the candidate tool corresponds to the processing task associated with the target blade disk model.

[0042] Step 209: performing interference detection on the candidate tools.

[0043] In order to ensure the use of candidate tools, it is necessary to determine the working status of the candidate tools in two-dimensional space to prevent interference between the candidate tools during application.

[0044] Step 210: Based on the detection result of the interference detection, determine the candidate tool as the target machining tool.

[0045] When the interference detection results confirm that there will be no interference in the two-dimensional space, the target processing tool can be determined.

[0046] Step 211 , combining the interpolation method and planning the tool axis trajectory vector corresponding to the target blade based on the target machining tool.

[0047] In the present application and the forty-somethings, the process is implemented as follows: determining the leading edge limit coordinate point based on the leading edge limit edge; determining the trailing edge limit coordinate point based on the trailing edge limit edge; determining the first initial tool axis based on the leading edge limit coordinate point; determining the second initial tool axis based on the trailing edge limit coordinate point; and planning the tool axis trajectory vector corresponding to the target blade by combining the interpolation method, the first initial tool axis and the second initial tool axis.

[0048] That is, in this process, by determining the limit point, the tool axis trajectory vector corresponding to the target blade can be determined in two-dimensional space in combination with a linear interpolation process, and a two-dimensional tool axis trajectory vector can be generated.

[0049] Optionally, a conversion process is involved between the two-dimensional tool axis trajectory vector and the three-dimensional tool axis trajectory vector. That is, in the embodiment of the present application, the tool axis trajectory vector can be a two-dimensional vector or a three-dimensional vector after coordinate conversion.

[0050] Step 212, performing interference check on the tool axis trajectory vector.

[0051] It should be noted that, since the actual machining process is a three-dimensional machining process, it is necessary to check and verify the possibility of interference.

[0052] In an embodiment of the present application, the interference check method is to determine the initial tool axis and the rotation axis of the tool axis trajectory vector in three-dimensional space, and perform interference check on the tool axis trajectory vector based on the initial tool axis and the rotation axis.

[0053] To summarize, the method provided in the embodiment of the present application, in the process of selecting tools and planning paths for processing the target blade disk, combines the physical state of the target blade disk model, determines the target processing tool that is compatible with the target blade disk, and plans the tool axis trajectory vector based on the specific state of the target processing tool, thereby achieving efficient planning of the path of the spatial tool axis during the processing of the entire blade disk.

[0054] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for planning the spatial tool axis trajectory vector of an integral blade disk, characterized in that: The method is applied in a computer device, and the method comprises: Acquire a target blade disk model, wherein the target blade disk model corresponds to a physical workpiece to be processed; Determining a processing range based on the target blade disk model; Determining a target machining tool corresponding to the target blisk model based on the machining range; Based on the target machining tool, a tool axis trajectory vector corresponding to the target blade is planned.

2. The method according to claim 1, characterized in that: The determining of the processing range based on the target blade disk model includes: Based on the leading edge limit edge and the trailing edge limit edge corresponding to the target blade disk model; The processing range is determined based on the leading and trailing edge limit edges.

3. The method according to claim 2, characterized in that The leading and trailing edge limit edges corresponding to the target blade disk model include: Determining a rotation axis corresponding to the target blade disk model; The leading edge limit edge and the trailing edge limit edge corresponding to the target blade disk model are determined based on the rotation axis.

4. The method according to claim 2, characterized in that: The step of determining a target machining tool corresponding to the target blade disk model based on the machining range includes: Determine a first edge coordinate corresponding to the leading edge limit edge based on the leading edge limit edge; Determine a second edge coordinate corresponding to the trailing edge limit edge based on the trailing edge limit edge; Combining the first edge coordinates and the second edge coordinates to generate a three-dimensional coordinate area of ​​a processing range; Performing coordinate transformation on the three-dimensional coordinate region of the processing range to obtain a two-dimensional coordinate region of the processing range; Determine a candidate tool corresponding to the target blade disk model through the two-dimensional coordinate area of ​​the processing range; Performing interference detection on the candidate tool; Based on the detection result of the interference detection, the candidate tool is determined to be the target machining tool.

5. The method according to claim 4, characterized in that The performing tool detection on the candidate tool comprises: Generate a two-dimensional coordinate of a tool corresponding to the candidate tool; Interference detection is performed based on the two-dimensional coordinates of the tool and the two-dimensional coordinates of the processing range.

6. The method according to claim 5, characterized in that The planning of a tool axis trajectory vector corresponding to the target blade based on the target machining tool includes: In combination with the interpolation method, based on the target machining tool, a tool axis trajectory vector corresponding to the target blade is planned.

7. The method according to claim 6, characterized in that The combined interpolation method, based on the target machining tool, plans a tool axis trajectory vector corresponding to the target blade, including: Determine the leading edge limit coordinate point based on the leading edge limit edge; Determine the trailing edge limit coordinate point based on the trailing edge limit edge; Determine a first initial tool axis based on the leading edge limit coordinate point; Determine a second initial tool axis based on the trailing edge limit coordinate point; The interpolation method, the first initial tool axis and the second initial tool axis are combined to plan the tool axis trajectory vector corresponding to the target blade.

8. The method according to claim 1, characterized in that: After planning the tool axis trajectory vector corresponding to the target blade based on the target machining tool, the method includes: An interference check is performed on the tool axis trajectory vector.

9. The method according to claim 7, characterized in that: The interference check on the tool axis trajectory vector comprises: Determine the initial tool axis and the rotation axis of the tool axis trajectory vector; An interference check is performed on the tool axis trajectory vector based on the initial tool axis and the rotation axis.

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