The influence of hole finishing strategies on quality

What is it about?

There are many strategies that the operator can use for hole finishing, depending on the equipment available to him. The issue at hand is choosing the optimal strategy when equipment is available for more than one possible manufacturing method. The present work analyses four types of finishing strategies for holes and determines the advantages and disadvantages of each, from a quality perspective.

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Why is it important?

After interpreting the results of this study, the following conclusions were reached: - The highest quality can be obtained by helical milling, it being the most stable strategy, with a high repeatability rate resulting from the low standard deviation (<0.01 mm); - Reaming is the most unstable strategy, being highly influenceable by tool wear; - The hole quality obtained through helical milling is fairly constant across the studied materials; - Plastics (POM) seem to be fairly indifferent to machining strategy with a constant dimensional accuracy; - Helical milling is recommended for obtaining a high form precision for holes; - Head boring followed by helical milling are recommended for obtaining a high circularity; - To obtain a good cylindricity, one could use either head boring, helical milling or profile milling;