For many non-standard parts processing customers, when selecting suppliers, they are most concerned about the machining accuracy of mechanical precision parts. In the precision machining industry, it is easy to find suppliers, but it is difficult to find CNC machining center suppliers with appropriate accuracy, so we must be cautious. In short, precision is risky and processing needs to be cautious.
Machining of mechanical precision parts
In the machining center of non-standard parts, more cutting tools are generally used in the machining process. In order to ensure the machining accuracy of precision parts, the replacement sequence of cutting tools must be arranged reasonably. The corresponding replacement of machining tools is the machining sequence. The general process principle is to make the datum first, then punch holes, and then divide the primary and secondary rough and then fine.
In the machining process of mechanical precision parts, the machining of datum surface is the best, which provides positioning reference for the machining of other surfaces. The benchmark of this process positioning is the benchmark of the next process positioning. Therefore, when the positioning datum of all processes of machining a non-standard part is determined, the sequence arrangement of the whole machining process can be pushed forward.
When arranging the processing sequence of mechanical precision parts, it must be clear whether non-standard parts need to be processed and processed. Pre machining is also usually done by CNC lathes. If the workpiece has high rough accuracy, the positioning is guaranteed, or the processing volume is sufficient, it can be processed directly in the machining center without pretreatment. This needs to consider the difference between the accuracy of the rough datum and the process of the machining center, which can be completed by several processes or one process.
Similarly, if the pretreatment surface has different standard requirements from the operation surface of the machining center, sufficient machining allowance must be reserved during pretreatment. At the end of one-time clamping in the machining center of non-standard mechanical precision parts, all machining contents including the pre machined surface must also be included to ensure the final machining accuracy of precision parts.
ken. tang@chengcg.com
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