Research and development and future of CNC products
I. Industry trends and requirements Parts measurement and inspection is still an important element in the quality assurance process. In the past few years, measurement-related technologies have changed dramatically in both hardware and software, and measurement probes and scanning devices have collected data much faster. However, multi-axis probing path programming is required to achieve efficient measurements on a single device in the case of complex geometries. These inspection procedures are generally required to be prepared separately from the PLM process. Users usually work on a 2D engineering drawing at a very slow rate. Not only that, but because of the limitations of design and manufacturing models and data traceability, it is also very easy to make mistakes. When a design change occurs, the inspection process is likely to be inconsistent with the changed design. Siemens PLM Software offers new applications for writing advanced CMM measurement verification programs that use model-based product and manufacturing information (PMI) to automatically create measurement programs and fully validate programs with the latest 3D simulation software. And provide industry-standard output for direct use by the user CMM. The latest high-speed detection and scanning technology collects data 10100 times faster than older devices. The new device not only allows for more measurement work, but also allows for more complex measurements. But test programmers also face a big problem: their current solution for creating these more complex inspection procedures is not only too expensive, but also takes too long. In addition, the number of customers using a comprehensive 3D product definition in a CAD system exceeds half of the total number of customers. In addition to the part geometry, all other manufacturing information is included. This information is captured and attached to the 3D model as Product and Manufacturing Information (PMI). For ease of inspection, this information can include tolerance requirements. If downstream tools can take advantage of this information, they will better meet manufacturing requirements. Another problem is that CMM programming, execution, and data acquisition are separate from mainstream design and manufacturing processes. Users want to make CMM programming, execution, and data acquisition an integral part of the overall PLM workflow, storing data into PDM systems. Second, a new CMM numerical control measurement programming method NX CMM CNC measurement programming is a new module in NX, fully integrated into NX, NX has all the CAD tools required for geometric operations, as well as all the PMI creation and PMI integration needs Tools, the new CMM inspection programming product is fully embedded in NX. NX also includes proven, proven technologies that can be directly applied to CNC measurement programming, such as machine tool simulation. A key goal in developing new applications is to achieve a high degree of automation, using model-based PMI data to drive programming as much as possible. The NX software has a unique feature called "Connect PMI." The Connect PMI command actually takes the 3D part geometry and the PMI attached to the model, then extracts all the identified features and tolerances from the software, creating all the inspection operations necessary to verify the part. Open the information navigator in the software and generate a digital measurement path according to the type of feature to be measured and the PMI attached to it. For some parts of the model where PMI data is available, applying the "Connect PMI" command can reduce the traditional programming time by 80% 9%. Of course, for parts that do not have additional PMI data available, or where the PMI data is incomplete, or if the test programmer wishes to add additional measurements, the measurement features and operations can be created manually. Selecting one of several pre-defined measurement methods and then selecting points or features on the model's 3D model geometry, NX will generate the correct path. Once the CMM program is available, the NX CMM can create output commands that can be read by the software that drives the measurement machine. Machine operation instructions can be created simply by selecting the appropriate post processor. However, before sending the program to the shop floor, the user will most likely want to check it to make sure it measures in the way he expects or wants, without any hardware conflicts. In fact, for complex tasks, users are likely to want to perform these checks when developing the inspection program to avoid future changes. The NX CAM software provides some standard CMM machine models. You can import 3D models of CMM machines, or you can use NX CAD to create 3D models of special CMM machines. With the "Machine Builder" module, you can add the necessary kinematics and range of motion for each CMM machine. Since the simulation is driven by the DMIS output, it is a good representation of the data sent to the shop floor. Since the CMM application software is embedded in NX, the inspection data is automatically stored under a verification process in the product data management system Teamcenter. For customers using Teamcenter, the software not only provides storage templates, tools and probes, and inspection rules, but also provides checkers and output files that link to the correct version of the part. By managing the inspection data and linking it to the master record of the part, one of the biggest challenges facing this business is to ensure that the CMM geometry is consistent with the design model and the published manufacturing geometry, as shown. If there are any changes that may affect the downstream department, Teamcenter can notify the relevant downstream department. Here, the relevance in NX also plays a role. If the design input changes, this association will prompt the update of the relevant part model. Third, the positioning of CMM in an overall manufacturing solution Siemens PLM Software predicts that the new NX CMM CNC measurement application software will be adopted by many companies, based on the same model, by doing more work in the same system Can achieve more benefits. Siemens PLM Software has embedded this new application into its portfolio of parts manufacturing solutions, extending NX's role in the virtual world of manufacturing engineering and using NX for NC programming, part model preparation, and tool and fixture design. . All of these components are part of the same suite, so compatibility with each other is quite good. One of the values ​​of the NX architecture is that NX is one of the most customizable CAD/CAM/CAE systems available today. For the user, the integrated architecture will undoubtedly bring huge benefits. In this case, by using the same NX architecture, users can develop automated programs that are compatible with NX CMM, and it is possible to achieve automation and repeatability levels that require additional investment. Conclusions The current methods for creating CMM programs are too expensive, take too long, are error-prone, and are not integrated with PLM workflows. The NX CMM is an NX CAM-based NX model that allows users to create fully correlated inspection programs for CMMs in a highly automated manner using PMI. If the user does not have a PMI, the verification path can be created interactively. NX CAM makes inspection programming an integral part of the PLM process, fully automated with NX Geometry and PMI, and managed in Teamcenter with the best NX user interface of its kind. The team that developed this new product has developed Valisys and Tecnomatix measurement and inspection software for Siemens PLM Software. This new product also demonstrates the team's extensive experience in testing application development. In addition, this new software will add some features, especially in the field of multi-axis measurement. For existing Siemens PLM Software customers, this new product has significant advantages and is sufficient to help new customers adopt NX and other products from Siemens PLM Software. 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