Briefly describe the grinding process of the double-sided grinding machine
Source: http://seocai.com Time: 2018/11/14 9:24:12
The grinding process of the double-side grinder is widely used in industry because it can produce high-quality and high-precision surfaces. Obtaining good process performance is more like artistic skills than technological achievements. Therefore, proper monitoring and control systems should be used to increase the productivity of expensive machine tools.
A proper definition of the grinding remediation time of the double-side grinder is critical to the optimization and control of the overall grinding process. If the grinding discs are separated too late, the proper metal removal rate is not reached, and even worse, the workpiece surface may be damaged. On the other hand, if the dressing is applied too frequently, dressing diamond wear and abrasive disc wear will cause huge costs. In the case of grinding classical dressings (ie discontinuous), it takes time to use unnecessary dressings, which in turn increases production costs.
In addition to cutting the surface of the workpiece, friction can also be produced during the interaction between the grinding disc and the workpiece. Recent research has shown that there is a strong correlation between surface transitions and emitted sound and vibration. Based on sound and vibration, skilled operation can detect whether the grinding wheel is sharp or dull.
The operator's technique depends on the person's ability to extract characteristic frequencies. During grinding, the frequency of the sound ranges from 5000 to 10000 Hz and reflects the cutting profile. Based on existing experience, new abrasive discs have a higher frequency throughout their life cycle. The particles on the grinding disc, the metal filings filled in the holes, and the distance from the metal sheet make the distance between the grinding discs larger, which results in larger wafers and higher surface roughness. Therefore, in the characteristic frequency range, the frequency is reduced to between 5000 and 6000 Hz according to the size of the abrasive particles on the grinding disc.
In short, there are two sources of information about the current process status: vibration signals and expert judgment. We have been exploring the relationship between the characteristics of vibration signals and the evaluation time of expert performance levels to study automated control actions.
Original title: Grinding process of double-sided grinder