MULTI-SPINDLE DRILLING MACHINE HAVING FREELY REPLACEABLE LARGE SPINDLE HEAD

摘要

PURPOSE:To replace the large spindle head freely by constructing such that the large spindle head can also be rotated smoothly by a motor. CONSTITUTION:A cylindrical guide rail C for guiding the replacing spindle head B is provided horizontally on the machine pole 4 around a portion of it. A portion C1 of said rail C at the side where the engine section A will elevate is separated from other section C2 and provided integrally with the dropping frame section A' of the engine A. The mechanism for mounting the spindle head carrying body D onto the guide rail C will hold the upper section of the rail C by means of a roller rolling on the flat section 25 of the rail C at the upper end of said body D, a roll 28 provided at the lower edge of said body D and the roller at the lower edge of the inner wall section.