Part model cutter path and machining process automatic generation method and generation system

Abstract

The invention discloses a part model tool path and machining process automatic generation method and system. The method comprises the steps that model information and size data of a to-be-machined model are obtained; identifying the type and processing characteristics of the to-be-processed model, and creating a blank of the processing model according to the obtained size data; calling processing steps, processing parameters and processing equipment which pre-store the same processing characteristics in a process knowledge base and a process resource library to carry out simulation processing on the identified processing characteristics, and outputting a tool path; and by utilizing a synchronous modeling technology of a three-dimensional model, a process model and each process step model are created by utilizing a process template according to a tool path output by performing simulation processing on the identified processing characteristics, and a corresponding process drawing and a process card are generated. The tool path of the part model compiled through the method is accurate, the filled process card for reference of operators is clear, and the operation quality and the operation efficiency can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing technology, and in particular to a method and system for automatically generating a tool path and a processing technology for a part model. Background Art

[0002] In the traditional sense, process design uses computer-aided process planning (hereinafter referred to as CAPP) tool software to compile and issue process cards based on the BOM structure of a certain model of product. The workshop site is based on two-dimensional product drawings and process cards for processing and inspection. Due to the limited information expressed in text and simple drawings, a large number of paper documents need to be borrowed on site, which makes management and traceability difficult. In addition, since traditional CAPP manages process with documents as the management object, there is a lack of structured logical association between related products, BOMs, processes, processes and manufacturing resources (equipment, tooling). When the design model changes or the on-site working conditions change, it is difficult to respond in the first time, resulting in low production efficiency.

[0003] In the traditional sense, the processing method of parts requires engineers to write special tool paths, rely on engineers' instructions to achieve simulated processing of the final part model, and rely on engineers' experience, knowledge and professional ability. It is inevitable that engineers will get tired during long-term work, especially for batch production of similar parts, which requires low efficiency in writing tool paths and filling out process cards. Summary of the invention

[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a method and system for automatically generating tool paths and processing processes for part models. The tool paths of the compiled part models are accurate, and the process cards filled in for reference by operators are clear, which can ensure the quality and efficiency of operations.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides a method for automatically generating a tool path and a processing technology for a part model, comprising:

[0007] Obtain model information and dimension data of the model to be processed;

[0008] Identify the type and processing features of the model to be processed, and create a blank of the processing model based on the acquired dimensional data;

[0009] Calling the processing steps, processing parameters and processing equipment pre-stored in the process knowledge base and process resource base for the same processing features to simulate the processing of the identified processing features, and outputting the tool path;

[0010] The synchronous modeling technology of the three-dimensional model is used to simulate the processing of the identified processing features. The tool path output uses the process template to create the process model and each step model, and generate the corresponding process drawings and process cards.

[0011] Furthermore, in the above-mentioned method for automatically generating a tool path and a machining process for a part model, the model information includes a drawing number, a name and a material of the model to be machined.

[0012] Furthermore, in the above-mentioned method for automatically generating a tool path and a machining process for a part model, the dimension data includes a PMI dimension of the model to be machined.

[0013] Furthermore, in the above-mentioned method for automatically generating tool paths and machining processes for part models, the types of models to be machined include at least shafts, sleeves, plates and boxes.

[0014] Furthermore, in the above-mentioned method for automatically generating tool paths and machining processes for part models, the machining features include at least holes, planes, step surfaces, threaded surfaces, cavities, bosses and grooves.

[0015] In a second aspect, the present invention also provides a system for automatically generating tool paths and processing techniques for part models, comprising:

[0016] An acquisition module, the acquisition module is used to acquire model information and dimension data of the model to be processed;

[0017] An identification module, which is used to identify the type and processing features of the model to be processed, and to create a blank of the processing model according to the acquired dimensional data;

[0018] A calling module, wherein the calling module calls the processing steps, processing parameters and processing equipment pre-stored in the process knowledge base and the process resource base for the same processing features to simulate the processing of the identified processing features and output a tool path;

[0019] A generation module is used to utilize the synchronous modeling technology of the three-dimensional model to simulate the processing of the identified processing features, output the tool path using the process template to create the process model and each process step model, and generate the corresponding process drawing and process card.

[0020] The main advantages of the technical solution of the present invention are as follows:

[0021] The method for automatically generating tool paths and machining processes for part models of the present invention obtains model information and dimension data of the model to be machined, identifies the type and machining features of the model to be machined, processes the identified machining features based on and with reference to machining steps, machining parameters and machining equipment of the same machining features pre-stored in a process knowledge base and a process resource base, creates a process model and each process step model using a process template, and generates corresponding process drawings and process cards. The tool path of the compiled part model is accurate, and the filled-in process card for reference by the operator is clear, thereby ensuring the quality and efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 The present invention is a flowchart of a method for automatically generating a tool path and a machining process for a part model according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] The technical solution provided by the embodiments of the present invention is described in detail below with reference to the accompanying drawings.

[0026] As attached Figure 1 As shown, an embodiment of the present invention provides a method for automatically generating a tool path and a processing technology for a part model, the method comprising:

[0027] Acquire the model information and dimensional data of the model to be processed; identify the type and processing features of the model to be processed, and create a blank of the processing model according to the acquired dimensional data; call the processing steps, processing parameters and processing equipment of the same processing features pre-stored in the process knowledge base and process resource library to simulate the processing of the identified processing features, and output the tool path; use the synchronous modeling technology of the three-dimensional model to simulate the processing of the identified processing features. The output tool path uses the process template to create the process model and each step model, and generate the corresponding process drawing and process card.

[0028] Therefore, the method for automatically generating tool paths and processing techniques for part models of the present invention automatically generates processing steps and processing parameters of parts by identifying part features, arranges part processing procedures according to a process library, generates process models and work step models through three-dimensional software synchronous modeling technology (WAVE) and automatically inherits the PMI dimensions on the model, completes the structured process of automatically generating parts under the guidance of the process model, makes the tool path of the compiled part model accurate, and the filled-in process card for reference by operators is clear, which can ensure the quality and efficiency of the operation.

[0029] Specifically, in the method for automatically generating tool paths and machining processes for part models of the present invention, the model information includes at least the drawing number, name and material of the model to be machined, and the dimensional data includes the PMI dimensions of the model to be machined; the types of models to be machined include at least shafts, sleeves, plates and boxes; and the machining features include at least holes, planes, step surfaces, threaded surfaces, cavities, bosses and grooves.

[0030] In summary, the part model tool path and processing technology automatic generation method of the present invention are to solve the problem that the traditional machining process uses files as the management object for process management, lacks structured logical associations between related products, BOMs, processes, procedures and process resources (equipment, tooling), and two-dimensional drawings cannot unify the data source, and cannot achieve full-scale and automatic expression of parts, resulting in low production efficiency. The part model tool path and processing technology automatic generation method of the present invention combines the characteristics of the part model to be processed, obtains the information and dimensional data of the part model to be processed, and automatically identifies some common feature types of parts such as holes, inner and outer cylindrical surfaces, planes, chamfers and fillets, annular grooves and overrun grooves, etc., and calls the process knowledge base and By extracting the PMI parameters of the model, the system automatically infers the processing steps and processing parameters of each feature to form the processing method of the feature. The process library can automatically generate the part process. After the process is generated, the process model can be automatically generated and the PMI annotation dimensions on the part model can be directly inherited. At the same time, the synchronous modeling technology (WAVE) of the three-dimensional model can also be used to quickly create process models or work step models with different allowances. The structured PMI dimension information can also be automatically imported into the process card to generate the inspection requirements and dimensions and tolerance range of the process for subsequent process execution and quality inspection, so that the tool path of the compiled part model is accurate and the filled-in process card for reference by the operator is clear, which can ensure the quality and efficiency of the operation.

[0031] In a second aspect, the present invention also provides a part model tool path and processing technology automatic generation system, including an acquisition module, an identification module, a calling module and a generation module, wherein:

[0032] The acquisition module is used to obtain the model information and dimensional data of the model to be processed; the identification module is used to identify the type and processing features of the model to be processed, and create the blank of the processing model according to the acquired dimensional data; the calling module calls the processing steps, processing parameters and processing equipment of the same processing features pre-stored in the process knowledge base and process resource library to simulate the processing of the identified processing features, and output the tool path; the generation module is used to use the synchronous modeling technology of the three-dimensional model to simulate the processing of the identified processing features. The output tool path uses the process template to create the process model and each step model, and generates the corresponding process drawing and process card.

[0033] In combination with practical applications, the part model is processed by the above-mentioned part model tool path and processing technology automatic generation method of the present invention, including:

[0034] Import the part model to be processed into the system or software used for writing the tool path of the part model, and read the properties of the part, such as the part drawing number, part name, material, and part PMI size;

[0035] Identify obvious features such as holes, outer cylindrical surfaces, planes, chamfers, fillets, and shaft end faces in the imported part model to be processed;

[0036] It should be noted that for the above-mentioned features that are not obvious or multiple features are combined into one feature, the feature type is first determined, and then the processing surface on the model is selected. The system or software automatically determines whether it is the feature and extracts the geometric parameters, processing requirements and other information of the feature;

[0037] By calling the process knowledge base and process resource base, the processing steps, processing parameters and processing equipment of each feature are automatically inferred and called out;

[0038] For example, for processing holes: drilling-expansion-chamfering can be automatically generated, and the corresponding processing methods can be generated; at the same time, combined with practical applications, to improve work efficiency, the generated processing path can be manually intervened, such as the processing technology with the same characteristics mentioned above can be set to: such as rough milling-semi-finishing milling-finishing milling; the method of rough turning-semi-finishing turning-finishing turning of the outer cylindrical surface is set to rough grinding-finishing grinding and other processing methods. At the same time, in order to match the equipment required for the generated processing technology with the actual equipment, the operator can select the corresponding processing equipment according to actual needs, or specify the corresponding processing equipment, and then generate the corresponding processing technology according to the specified processing equipment or the selected processing equipment.

[0039] According to the model of the part to be processed, especially for bars and sheets, the system or software used for tool path setting can automatically generate a blank model of the part according to the shape of the part; at the same time, in order to save the cost of processing parts and reduce the cutting time during the part processing process, according to the actual size of the blank of the processed part model, and in order to match the blank size of the actual part model with the blank size set by the system, the size and allowance of the blank can be set manually.

[0040] Specifically, according to the process and step planning content, process personnel can quickly obtain part names, drawing numbers, views, geometric annotation sets, PMI data and generate processing dimensions, processing inspection points, PMI process views, etc. through model viewing tools, and then use the synchronous modeling technology (WAVE) of 3D models to quickly create process models and each step model for subsequent use such as work guidance, CAM processing and 3D inspection;

[0041] Use process templates to quickly generate corresponding process cards and process drawings; ultimately create interactive 3D work cards and the entire process to provide visual work guidance for workshop workers at the production site.

[0042] Specifically, in combination with actual applications, during the process model design, process personnel will extract relevant PMI data based on the current part model, processing features, dimension marking, tolerance marking, processing area identification, surface roughness, process technology requirements and inspection requirements, and automatically extract the corresponding tolerance data by adding filtering conditions and output it to Excel files or process cards. Process personnel can directly call these parameter data in the process model editing interface and associate them with the inspection dimension requirements in the specific process for subsequent process execution and quality inspection.

[0043] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for automatically generating tool paths and machining processes for a part model, characterized in that: include: Obtain model information and dimension data of the model to be processed; Identify the type and processing features of the model to be processed, and create a blank of the processing model based on the acquired dimensional data; Calling the processing steps, processing parameters and processing equipment pre-stored in the process knowledge base and process resource base for the same processing features to simulate the processing of the identified processing features, and outputting the tool path; The synchronous modeling technology of the three-dimensional model is used to simulate the processing of the identified processing features. The tool path output uses the process template to create the process model and each step model, and generate the corresponding process drawings and process cards.

2. The method for automatically generating tool paths and machining processes for part models according to claim 1, characterized in that: The model information includes the drawing number, name and material of the model to be processed.

3. The method for automatically generating tool paths and machining processes for part models according to claim 1, characterized in that: The dimension data includes the PMI dimension of the model to be processed.

4. The method for automatically generating tool paths and machining processes for part models according to claim 1, characterized in that: The types of the models to be processed include at least shafts, sleeves, plates and boxes.

5. The method for automatically generating tool paths and machining processes for part models according to claim 1, characterized in that: The processing features include at least holes, planes, step surfaces, threaded surfaces, cavities, bosses and grooves.

6. A system for automatically generating tool paths and processing techniques for part models, characterized in that: include: An acquisition module, the acquisition module is used to acquire model information and dimension data of the model to be processed; An identification module, which is used to identify the type and processing features of the model to be processed, and to create a blank of the processing model according to the acquired dimensional data; A calling module, wherein the calling module calls the processing steps, processing parameters and processing equipment pre-stored in the process knowledge base and the process resource base for the same processing features to simulate the processing of the identified processing features and output a tool path; A generation module is used to utilize the synchronous modeling technology of the three-dimensional model to simulate the processing of the identified processing features, output the tool path using the process template to create the process model and each process step model, and generate the corresponding process drawing and process card.

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