Toyoda Koki Kabushiki Kaisha

Takanori Ohta

Takehiko Hayashi

Masayoshi Takagi

Hiroyuki Ikuta

Ryoichi Takami

Takehito Aikawa

Hiroki Osada

A machining system comprising a plurality of different kinds of single purpose machining units arranged at plural machining stations located along a transfer path, and a transfer apparatus for transferring plural kinds of workpieces along the transfer path so as to position each of the workpieces at plural machining stations successively for machinings by the plural single purpose machining units. The machining system is provided with a return conveyor or a transfer vehicle for transferring the workpieces along a return path from the end of the transfer path to a workpiece unloading station, and a numerically controlled general purpose machine tool arranged adjacent to the return path. The general purpose machine carries out special machinings which cannot be carried out by the single purpose machining units for machining some workpieces which require such special machinings. Workpieces which do not require the special machinings are directly transferred from the end of the transfer path to the workpiece unloading station. The general purpose machine also memorizes plural numerical control programs corresponding to machinings carried by the single purpose machining units, and selectively carries out the numerical control programs when a malfunction occurs in one of the single purpose machining units.

Machining system

A crankpin rolling apparatus is provided wherein plural pairs of upper and lower arms are pivotably carried by respective hinge pins extending in parallel relation with the rotational axis of a workpiece support device. A pair of upper and lower roller holders each rotatably carrying burnishing rollers are respectively mounted on each pair of the upper and lower arms. When the plural pairs of upper and lower arms are closed by respective pressuring actuators, the pair of upper and lower roller holders arrest a corresponding one of crankpins of a crankshaft on the workpiece support means and pressure the burnishing rollers upon fillets formed on the corresponding one of crankpins. The hinge pins are respectively carried by a plurality of rocking members, which are independently pivotable about a support shaft held by a machine frame in parallel relation with the rotational axis of workpiece support device. A drive device incorporated in the workpiece support device rotates the crankshaft supported thereon, during which time pivot movements of the rocking members permit the upper and lower roller holders of each pair of upper and lower arms to rotate following a corresponding one of the crankpins. A position control mechanism is further provided for regulating the upper and lower arms to take respective pivot positions suitable for the loading of the crankshaft onto the workpiece support device.

Crankpin rolling apparatus

Growing community of inventors

Nishio, Japan

Takanori Ohta