In the tooling of some piercing operations, plates are used that contain hundreds of holes with small diameters and very tight position and dimension tolerances. The best way to ensure high requirements is the machining of the holes in plates together. Because of the greater length-diameter ratio, an intermittent drilling process must be applied. The errors of the holes could then be reduced in the second drilling, followed by reaming and/or burnishing. Interchangeable dies are manufactured using a specially prepared master drilling plate or the existing guide plate.
GrooverM. P.Fundamentals of Modern Manufacturing. Materials, Processes and Systems, 1996 (Prentice-Hall, Englewood Cliffs, New Jersey).
2.
TönshoffH. K.SpintigW.KönigW.NeisesA.Machining of holes. Development in drilling technology. Ann. CIRP, 1994, 43(2), 551–561.
3.
LehtihetE. A.Statistical models for the relationship between production errors and the position tolerance of a hole. Ann. CIRP, 1990, 39(1), 569–572.
4.
KudlaL.Influence of feed motion features on small holes drilling process. J. Mater. Processing Technol., 2001, 109(3), 236–241.
5.
KudlaL.Drilling of deep microholes in PCBs. In Proceedings of 4th International Seminar on Precision and Electronic Technology (INSEL'99), Warsaw, 22–24 November 1999, pp. 133–138.
6.
KudlaL.Small holes drilling in dies and molds manufacturing process. In Proceedings of 1st International Conference on Machining and Measurements of Sculptured Surfaces (MMSS'97), Krakow, Poland, 24–26 November 199769–78.
