Our factory has a batch of processed products. The product is a hemisphere with the shape shown in Figure 1. Its dimensional accuracy and surface roughness are all required. The main methods used are three processing methods, all of which are equipped with ordinary horizontal lathes (such as C6140). The three processing methods are: hand-advanced mode, hand-to-tool block method, and machine-to-tool block method. Each of the three methods has its own
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