【Jiaqin Comment】The MBD-based welding process modeling and process design scheme invented by Huatian Software can realize the rapid addition, deletion, modification and visual interaction of the three-dimensional welding process model, and realize the inheritance and application expansion of the MBD model from design to process, so as to obtain the welding feature construction and expression method of the lightweight model.
At present, the mainstream welding process design adopts a two-dimensional mode, which mainly relies on paper welding process and process design marked by design drawings.
Because the process design completely relies on the paper two-dimensional diagram that expresses the design intention, the welding process is largely subject to the expressiveness of the paper, and in the process of converting from the physical image to the abstract two-dimensional view expression, a lot of energy is wasted by the process personnel, and ambiguity and deviation are inevitable.
In addition, to sum up, the current domestic welding process still has the following deficiencies:
1) In the process design process, it is impossible to directly use the three-dimensional model issued by the design department to carry out process design;
2) The process design needs to convert the three-dimensional model into a two-dimensional diagram, resulting in a data source that is not unique and cannot be associated with the product design model. And when the same product is prepared by different process personnel, it will get different programs, lack of consistency, and it is difficult to fully and correctly consider the welding process in the initial stage of product design, and the feedback and modification of the welding process are slow and difficult to achieve;
3) The process design and process simulation are disconnected, and the simulation parameters and process design parameters cannot be automatically transmitted;
4) It is impossible to realize the visual expression of the process, and the operability and ease of realization of welding cannot be evaluated;
In view of the above problems, Huatian Software applied for an invention patent entitled "A Welding Process Modeling and Process Design Method and System Based on MBD" on October 13, 2021 (Application No.: 202111193521. X), the applicant is Shandong Shanda Huatian Software Co., Ltd.
According to the relevant information currently published in the patent, let's take a look at this technical solution.
As shown above, for the invention of the patent based on the MBD welding process model structure schematic diagram, first, the scheme from the drawing software to extract the design bill of materials BOM to form the initial process BOM structure, lightweight model and its model correspondence, according to these relationships to determine whether the original model has solder joint information, if there is solder joint information, then export the solder joint special feature data file from the drawing software, and reconstruct the solder joint weld information and solder joint model through data conversion.
In the above process, it is necessary to export the special characteristic data file of the weld joint weld from the drawing software, and reconstruct the solder joint weld information and the solder joint model through data conversion, and in the 3D visualization BOM corresponding to the initial model and the structural properties of the components, the welding relationship between the solder joint object and the component in the weld joint information can be created synchronously. According to the requirements of welding weld splitting, the CONSISTENCY adjustment of BOM nodes and lightweight model hierarchies is carried out.
As shown above, for the process diagram of the three-dimensional welding process modeling module solder joint import in the process, at the beginning of the import, you need to select the import object, and the import object is determined, if it is not a process object, it will pop up a prompt "The current location does not allow the import of the solder joint model", and if the decision requirements are met, it will further determine whether the process object is consistent with the total component information associated with the solder joint.
If both of the above conditions are met, the data will begin to be imported and the data of the solder joint structure will be created, as well as the relationship between the solder joint and the weld fitting will be recorded and loaded into the import list. Finally, based on the imported solder joint structure data, a solder joint model is created and a visual interactive correspondence is formed.
We return to the structure of the MBD welding process model, after the above steps, finally, after reconstructing the weld joint weld information and the solder joint model, if the solder joint information is still missing, the BOM node and lightweight model hierarchy consistency adjustment will be carried out for the welding welding split requirements, including on the basis of the welding process model, identifying the welding weld boundary, and creating a weld and solder joint feature model with groove characteristics, welding process symbols and welding process parameters based on the model.
The above is the MBD-based welding process modeling and process design scheme invented by Huatian Software, which can realize the rapid addition, deletion, modification and visual interaction of the three-dimensional welding process model, and realize the inheritance and application expansion of the MBD model from design to process, so as to obtain the welding feature construction and expression method of the lightweight model.
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