Our factory processes a batch of parts (Fig. 1). The material is 25Cr 2MoVA forgings. Due to the large workpiece and irregular shape, we use the boring machine to machine threaded holes, and the dimensional tolerance is not well controlled. For this reason, we design and manufacture the boring machine with multi-purpose knives. . The structure of the pick knife is shown in Figure 2. Where the bolt 2 is M16×
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