Broached Crankshaft Thrust Bearing
This broach machine package was tooled for a European bearing manufacturer that supplies thrust bearings for the engine crankshaft to various European automotive manufacturers. The parts are stamped from presses that are in close proximity to the broach machine. The machine operators are then required to load the parts into a double station magazine on the broach machine that hold approximately 20 minutes of parts. The bottom part of each magazine is stripped from the full stack of parts and pushed through the two broach tunnels where the broach tools remove stock and hold the parts flat as well as maintain a surface finish of less than 1.2 Ra. The parts are then pushed to an unloading area where two sets of fingers draw the pieces off the fixtures and down the exit chutes to the collection area. After broaching, the fixtures return to their initial station where cycle initiates and repeats again. The cycle will continue automatically until the magazines are low, the parts improperly feed into the broach tools or the parts are not removed from the exit chute area.
To accomplish this broaching operation, we use a special “Ohio” H218X horizontal broach machine with 2 tons of cutting force and 18 inches of cutting stroke and tandem stations in a single machine. The machine is hydraulically driven and has a dual parallel hydraulic system so that one side can run independent from the other. The machine is controlled by a PLC and has an integral coolant pump and reservoir that supplies coolant to the broach cutters. The machine is capable of 1,400 parts per hour with up to 40,000 parts between broach sharpening depending on the size and material of the part.