In the past few years, China has introduced a large number of advanced processing and inspection equipment from abroad, and has reached a high level in terms of hardware. It has solved hardware problems in the field of mechanical processing and manufacturing, and has introduced advanced CAD/CAM systems. It also brought a problem that some CAM software cannot solve. How to seek a higher level of high-speed, 5-axis technology? How to improve the processing efficiency, programming quality, machine safety, equipment utilization and tool cost savings? In response to these problems, more advanced manufacturing technologies have emerged internationally. For example, CNC machine tools online quality control system (OMV) and adaptive processing (FS-FIXTURE). These technologies are widely used in Airbus, Boeing/McDao, GE Aviation, NASA, Hyde Group, and Goodrich, but they still need to be further introduced and digested domestically. The principle of barrels in the manufacturing industry also exists. The backwardness of one link will result in the overall backwardness. At present, the issue of on-line quality control of CNC machine tools in domestic aviation, weapons manufacturing and optical high-precision manufacturing is already very common. Everyone is looking for an effective solution, then use the original CAD model as a theoretical basis for product quality control of CNC machining processes, and strictly control the relevant dimensional accuracy tolerances, form and position tolerances, process margins and process assessment adjustments of the manufacturing process As an ideal solution, this article elaborates on the implementation of this technology. The "on-machine inspection" (OMV) solution is an off-line programming software system for automated measurement of free-form surfaces and geometries used on CNC machine tools. The use of on-machine testing for aerospace manufacturing enterprise users can easily control the accuracy of products at the stages of primary processing and semi-finishing. During the machining process, before the parts are removed from the CNC machine tool, whether or not the parts are continued and whether they are reworked during the manufacturing process is a "wise" decision. By monitoring the quality of the machined parts at each stage of the process, a large amount of processing time can be saved. It can detect any errors in processing as early as possible, and correct them as quickly as possible, thus greatly reducing costs. The system uses high-precision Renishaw MP700 probe system and Delcam's on-machine inspection software Delcam Powerinspect OMV. The probe MP300 accuracy can reach 1~2μm. It can be applied to the online detection of most precision parts. Delcam Powerinspect OMV can be completed quickly and easily. The comparison between the machining model sample and the CAD raw data is not only an all-round testing expert, but also generates graphic and clear and easy-to-understand test reports. The OMV system can also be programmed off-line, pre-generating inspection NC programs, inputting CNC machine tools, and combining motion simulation, collision, and interference checks to reduce on-machine inspection time and processes. OMV's on-machine inspection system can also monitor the quality of workpieces at any stage of the machining process, and can detect and correct errors in time, thereby saving a lot of processing time and processing costs. For example, it can accurately detect the machining allowance of each curved surface after rough machining, without waiting until all the machining is completed to find out whether there is any error in the machining process. OMV's on-machine inspection system can also monitor the quality of workpieces at any stage of the machining process, and can detect and correct errors in time, saving a lot of processing time and costs. In the manufacturing process of some precision parts, waste products are often generated in the final process, so it is particularly important to find problems early to avoid the appearance of waste products. As such, the system is also suitable for measuring the degree of damage to a tool or workpiece caused by any machining error. Realizing the on-machine inspection of OMV CNC machine tools can also benefit companies that have to provide independent product inspections at the request of their customers. By performing a preliminary inspection of the workpiece directly on a numerically-controlled machine tool, errors can be discovered and corrected in time, and the occurrence of an error until the product is delivered to the tester can be avoided. The testing and manufacturing of the theoretical data must be uniform, and then OMV uses the same theory as modern digital manufacturing to perform data detection based on the CAD model and output necessary data. In addition, there are several aspects: (1) Parts quality testing: shape tolerances, surface errors, etc.; (2) Assembly testing: assembly error detection, equipment testing; (3) Optimized adjustment guidance: The assembly optimization adjustment plan can also be fully used, and then output the same data, output various forms of inspection reports, and provide all links to the process and manufacturing system. Using OMV on-machine inspections, the most obvious benefits are those manufacturers that do not have inspection capabilities. Most companies spend large sums of money to invest in specialized equipment to detect some large parts and components. This is unrealistic. Most modern CNC machines are equipped with or can be added with measuring devices that help the workpiece to be clamped. Now, if these CNC machines are equipped with PowerINSPECT's OMV modules, these measurement devices can also be equipped with detection capabilities at minimal additional cost. Its off-line programming fully detects the functions of the NC program and minimizes the interruption of the operation during the machining process. At the same time, the prerequisite for the updated adaptive processing (PS-FIXTURE) must be that the device has a detection function in order to effectively implement adaptive processing. The anti-theft Wheel Nut & Bolt Kits are more and more popular now which are also known as an anti disassembly screw, which is used for preventing the theft of a vehicle which park in an outdoor public place. This kind of screws need to use special tools to take out, play the role of anti-theft. 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At the same time it can support 5-axis machine tools, its main advantage is that it can detect any undercut surface condition without re-clamping the workpiece. In the same way, it can detect the processing of features in the workpiece that cannot be detected directly along the Z-axis. For example, a series of holes at different angles can be detected in only one step. In addition, when deeper cavities or sidewalls are detected, shorter probes can be used to reduce errors and form tolerances of the entire part by lowering the tip position near the workpiece and tilting the probe along the curved surface for inspection.
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