Three-axis spacing-adjustable T-shaped groove milling device

The utility model discloses a three-axis spacing-adjustable T-shaped groove milling device. The T-shaped groove machining device mainly solves the problems of low machining speed and low efficiency of T-shaped grooves in some workbench parts. The utility model relates to a numerical control lathe which is characterized in that a transmission box (22) is connected with a spindle box (1) through a rotary driving mechanism, three spindles are arranged in the spindle box (1), a transmission shaft II (5) is located on the axis of the spindle box (1), a transmission shaft I (8) is connected with a shaft I gear (11), the transmission shaft II (5) is connected with a shaft II gear (6), and a transmission shaft III (4) is connected with a shaft III gear (10); a shaft IV gear (19) is respectively meshed with a shaft V gear (18) and a shaft VI gear (32), a shaft V second gear (36) is respectively meshed with a shaft I gear (11) and a shaft II gear (6), and a shaft VI second gear (39) is respectively meshed with a shaft