Honda Giken Kogyo Kabushiki Kaisha

Masao Kume

Mitsuo Abe

Satoshi Miyatake

Hiroshi Umino

Shigehiro Yonemura

Takeshi Masaki

Toshihide Ogasawara

A synchronous operation control system for a numerically controlled machine such as a gear grinding machine or a hobbing machine includes a first motor for rotating a master shaft supporting a tool, a second motor for rotating a slave shaft, and a workpiece shaft operatively coupled to the slave shaft for supporting a workpiece which is to be machined by the tool. First and second encoders are coupled respectively to the master and slave shafts. Processors are provided for differentiating output signals from the first and second encoders with respect to time and thereafter calculating at least positional errors between the master, slave, and workpiece shafts. In addition, an adder is provided for adding output signals from the processors and applying an output signal to the second motor.

Synchronous operation control system for numerically controlled machine

An apparatus for automatically causing a workpiece to engage a rotary tool. A pulse signal generated by rotating a reference workpiece is stored, and then a pulse signal generated by rotating a mounted workpiece is counted. The counted pulse signal and the stored pulse signal are compared, and when they coincide with each other, the workpiece is brought into engagement with the rotary tool. When the rotary tool is shifted, the stored pulse signal information is updated, and then a pulse signal generated by rotating a mounted workpiece is counted. If the updated stored pulse signal information land the counted pulse signal information are equal to each other, then the workpiece is taken into engagement with the rotary tool.

Automatic workpiece engaging apparatus in grinding machines

A machine for automatically grinding a helical gear. The machine comprises a first rotational drive source for rotating a grinding wheel, a second rotational drive source for rotating a helical gear in mesh with the grinding wheel, a third rotational drive source for displacing the helical gear and the second rotational drive source in unison. Pulse generators are operatively connected to the first and third rotational drive sources. An output signal from one of the pulse generator is subtracted from an output signal from the other pulse generator to produce differential pulses which serve as drive pulses for the second rotational drive source.

Helical gear grinding machine

A grinding machine including a grinding wheel spindle motor for rotating a grinding wheel, a workpiece spindle motor for rotating a workpiece such as a gear to be ground in mesh with the grinding wheel, and a traverse motor for moving a table supporting the workpiece spindle motor. A power detector and a comparator are connected to a driver circuit for the grinding wheel spindle motor. When a load on the grinding wheel in mesh with the workpiece is increased, such a load increase is detected by the power detector and applied to a comparator. If the load signal is in excess of a reference level, then the application of a drive signal to the traverse motor is interrupted or a speed at which the workpiece is traversed relatively to the grinding wheel is reduced.

Grinding machine

A synchronous operation control apparatus for rotating a grinding wheel and a gear to be ground thereby in synchronism to grind teeth of the gear to a nicety. A pulse generator is connected to a rotational drive source for rotating the grinding wheel, and a counter is connected to an output terminal of the pulse generator. A division error is calculated from the number of teeth of the grinding wheel and the number of teeth of the gear which have been supplied in advance, to produce data for correcting the division error. A rotational drive source for rotating the gear is energized by frequency-divided pulses issued from the counter with a count as corrected by the data.

Synchronous operation control apparatus in grinding machines

An apparatus for bringing a rotary grinding tool into mesh with a workpiece while minimizing a grinding resistance by the workpiece when the workpiece is to be ground by the rotary grinding tool. An electric power detector is associated with the rotary tool and a sensor is associated with the workpiece. A gate is opened by a peak current detected by the power detector when the workpiece and the grinding tool engage each other and a pulse signal from the sensor, engaging a clutch to connect the workpiece directly to a drive source in response to a signal supplied upon elapse of a prescribed interval of time through a delay circuit.

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Tokyo, Japan

Masao Kume