Assessment of the Production Reducer for Clamping the Drilling Tools

摘要

The article deals with the evaluation of the production of the reduction clamping mandrel on the milling machine. The reducer is designed to clamp the drill tool with a 16 mm diameter cylindrical shank so that it can be clamped into the clamping head of the drill with a maximum diameter of 13 mm. The clamping tool itself is secured with two screws. The billets of the reducer are selected from the available manufactured steel parts, allowing it to be maximally fast and meet the production criteria. The material of the joined parts guarantees guaranteed weldability. The technological process, the method of clamping and setting of the tooling was chosen so as to achieve the desired deviations of co-ordination of the two coupled cylindrical components. Measurement of the produced diameter of the reducer and evaluation of co-ordination was done on the THOME 3D measuring instrument. It has been measured the diameter and the deviation of the co-ordinates of the produced cylindrical surfaces with a maximum value of 0.0053 mm, with a maximum quadratic error of 0.003543 mm. The produced reducer clamp was tested for the production of cylindrical holes by a 25 mm diameter drill. By measuring, stamping and practical application of the clamping mandrel, the possibility of replacing turning operations at the CNC milling center was confirmed.