Today's smart phones have changed from the plastic back cover to the thin metal body. Although the fallen shape attracts consumers, the production process of the phone case supplier is more difficult, because the cutting process of the chassis needs to be quite High precision, where fear is only a small deviation, may cause the workpiece to be scrapped, and the erosion of profits.
In order to improve the CNC processing yield, mobile phone operators are often forced to change tools frequently to ensure that the CNC machine maintains normal production tempo, but this will lead to higher cost of consumables, which also affects profits. In addition, mobile phone box processing industry attaches great importance to the rate of utilization, fearing that the CNC cutting machine will suddenly fail, causing negative chain reaction such as capacity decline and delivery delay, which will damage customer satisfaction and goodwill. Inspection, and commissioned outsourcers to provide second-line maintenance support, but these methods are passive, it is difficult to effectively deal with the first time in the event of abnormalities.
The mobile phone case is one of the cases of the CNC machine application. CNC cutting is widely used in various manufacturing processes, and various suppliers face similar profit protection battles. Xu Changyi, manager of Linghua Technology Measurement and Automation Products Division, believes that whether you want to improve the processing accuracy or increase the utilization rate, the bottom of the axe is to perform monitoring in the cutting process, especially the vibration monitoring, mainly This is because, once the machine is out of balance due to imbalance, resonance or misalignment, it is easy to affect the machine operation and cause a downtime.
If the CNC processing machine can be intelligently built and built a full-time vibration monitoring mechanism, the machine health status can be diagnosed at any time. It is not necessary to wait for the final product output in the past, and to determine the abnormal cause afterwards. Preventive detection, real-time detection of the processing machine began to appear unusual state, quickly take the corresponding treatment measures, including optimization and adjustment of processing parameters (such as changing the spindle speed), or replacement of tools, etc., immediately solve small deviations, avoiding the future Scourge.
It cannot be said that the cutting vibration monitoring of CNC machining machine is not a new topic born at the moment. In the past, there were some PLC solutions that were simple and convenient. It was advertised that as soon as the CNC machine was connected, it could quickly produce utility; therefore, it is inevitable Some people are curious, why is there a PC-based monitoring solution since PLC assists in cutting vibration monitoring?
The so-called devil is hidden in the details, some subtle vibration signals, or high-frequency signals, to some extent reflect the fact that the linkage mechanism may begin to appear unbalanced, the rotating spindle bearing ball breaks and affects the transmission power, or fasteners. Looseness means that the CNC machine starts to "get sick", and the symptoms are not consistent with the characteristics of the machine; these subtle and variable signs, with low sampling rate, support limited bandwidth range, algorithm Fixed-quality PLC solutions are not easy to capture. If the CNC monitoring solution can capture small changes and help users quickly grasp the key factors that may lead to reduced accuracy or capacity slip, they can be strained early.
In view of this, Linghua has launched a MCM-100 cutting vibration monitoring program, which advertises 24-hour uninterrupted data acquisition for spinning and equipment in high-precision, high-sampling conditions. Vibration measurement, and data collection, vibration analysis calculation, calculation, Internet access and other functions, to assist users of CNC processing machines to successfully solve the challenges faced by traditional cutting processes, to give CNC processing in the most easy and unburden way Machine intelligence.
Preventive maintenance through high-precision monitoringXu Changyi explained that in general, there are three kinds of detection situations that CNC machining machines want to establish. One is “Spindle VibraTIon DetecTIonâ€, which is intended to monitor the vibration of the spindle during cutting. The method is to directly measure the time domain (TIme Domain). The RMS value of the signal, if it exceeds the critical value, reduces the speed or stops the operation; the second is "Bearing Quality Diagnos TIc", which is intended to diagnose the bearing health, in the state where the CNC does not perform cutting, only high-speed idling; the third is " Spindle Collision Detection is used to detect the spindle collision. When the vibration waveform meets certain default conditions, it is judged that a collision has occurred and the spindle movement is immediately stopped urgently.
The above first and second scenarios are closely related to the accuracy and bandwidth range of the vibration signal. The PLC solution can obtain very little information and it is difficult to assist the user to establish a strain strategy. In contrast, the MCM-100 not only has 24 bit high resolution capability. (generally falling in the 12 or 16 bit range), and can capture high frequency signals with up to 128KS / s sampling rate (generally only support 20KS / s or even lower), to provide users with more vibration analysis material.
New business opportunities for CNC machine equipment manufacturersOn the other hand, the cutting vibration monitoring program can also create new business opportunities for CNC processing equipment manufacturers. As CNC processing equipment suppliers are exposed to a large amount of vibration information, once combined with big data analysis, there is a more thorough understanding of the correlation between signal changes and machine failures, and CNC processing equipment manufacturers can make good use of the accumulated Knowledge assets, to promote value-added services, and even adjust the business model, from the sale of equipment to the sale of machine hours, to establish long-term stable returns. According to Linghua Technology, a PC-based cutting vibration monitoring solution, the vibration monitoring program has entered the stage of landing, and has been adopted by various well-known CNC machine tool manufacturers. Its demand has increased significantly in 2017, which is evident in the CNC industry. Or CNC machine tool manufacturers' demand for CNC cutting vibration monitoring solutions is indeed more and more eager.
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