Grinding process of double-side grinder
Source of information: http://seocai.com Time: 2018/12/3 17:39:56
磨削过程因其能产生高质量和高精度表面而在工业上得到广泛使用。 The double-side grinder grinding process is widely used industrially because it produces 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.
补救时间的一个适当定义对整体研磨过程优化和控制是至关重要的。 A proper definition of the double-side grinder recovery time 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 technique of a double-sided grinder operator relies on the ability of a person 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, resulting 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