Tapping machine capable of being automatically regulated to rotate positively and negatively

Abstract

The invention discloses a tapping machine capable of being automatically regulated to rotate positively and negatively. The tapping machine comprises a machine base, a slide base, a motor, a gear disc, a speed reducer, a drill chuck and a screw tap. When the gear disc rotates, an inner gear ring at the outer side is firstly engaged with a gear; and when the gear disc rotates clockwise, the gear also rotates clockwise, so that the screw tap is driven to rotate positively through the drill chuck after the speed reducer decelerates to amplify torque. When the gear disc rotates by certain angle and the inner gear ring is separated from the gear, a fan-shaped gear is immediately engaged with the gear mutually while the gear disc still rotates clockwise, and the fan-shaped gear on the central part of the gear disc drives the gear to rotate anticlockwise, so that the drill chuck drives the screw tap to negatively rotate, and therefore, the screw tap negatively rotates to discharge metal breaking chips, and the service life of the motor is prolonged; and meanwhile, the inner gear ring and the fan-shaped gear drive the gear to rotate positively and negatively in a seamless mode, so that sudden high-torque impact on the screw tap is avoided, and therefore, the service life of the screw tap is effectively prolonged, and tapping reliability is improved.

Description

technical field [0001] The invention relates to the technical field of internal thread processing, in particular to a tapping machine with automatic adjustment of forward and reverse rotation. Background technique [0002] When processing internal threads, the tap needs to be rotated in the opposite direction after cutting a certain depth in the forward direction. The purpose is to discharge the cut metal chips, so as to avoid affecting the accuracy and even breaking the tap. No matter the existing tapping machine is driven by an air motor or a motor to rotate the tap, when the tap is controlled to rotate in the reverse direction, the air motor or motor is turned over immediately after forward rotation, and the air motor or motor is frequently adjusted in forward and reverse directions. Or affect its life, and at the same time, it will turn over immediately after the end of forward rotation, which will suddenly increase the torque of the tap test drive, which has a high prob...

AI Technical Summary

Problems solved by technology

No matter the existing tapping machine is driven by an air motor or a motor to rotate the tap, when the tap is controlled to rotate in the reverse direction, the air motor or motor is turned over immediately after forward rotation, and the air motor or motor is frequently adjusted in forward and reverse directions. Or affect its life, and at the same time, it will turn over immediately after the end of forward rotation, which will suddenly increase the torque of the tap test drive, which has a high probability of causing the tap to break.

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