Plating pretreatment apparatus and method for multi-cylinder block

摘要

A plating pretreatment apparatus for a multi-cylinder block includes a plurality of cylinders that performs a plating pretreatment of a cylinder inner wall surface of each of the cylinders using an electrode disposed so as to oppose to the cylinder inner wall surface by sealing one end of the cylinder inner wall surface and introducing a treatment liquid to the cylinder inner wall surface. In such plating pretreatment apparatus, at least one of a power supply device that supplies electricity to the cylinder block and the electrode and a liquid feed pump that feeds the treatment liquid into a gap between the cylinder inner wall surface and the electrode is provided for each of the cylinders.

主权项

1. A plating pretreatment apparatus for a multi-cylinder block having a plurality of cylinders that performs a plating pretreatment of a cylinder inner wall surface of each of the cylinders using an electrode that is positioned so as to oppose the cylinder inner wall surface by sealing one end of the cylinder inner wall surface and introducing a treatment liquid to the cylinder inner wall surface, the plating pretreatment apparatus comprising:
an apparatus main body placed on a pedestal and provided with a workpiece mount on which the cylinder block is mounted; a workpiece holding jig to which an air joint is mounted; a power supply device that is provided for each of the cylinders and supplies electricity to the cylinder block and the electrode, measures the current or voltage to be supplied based on a measurement value in the plating pretreatment; a liquid feed pump that is provided for each of the cylinders and feeds the treatment liquid into a gap between the cylinder inner wall surface and the electrode, at least one of the power supply and the liquid feed pump being provided for each of the cylinders; a controller that control the flow rate of the treatment liquid fed by the liquid feed pump based on a measurement value of an outlet temperature of the treatment liquid flowing out of each of the cylinders in the plating pretreatment; and a seal jig that is attached to an upper end portion of the electrode and seals one end side of the inner wall of each cylinder inner wall so as to form a treatment space for each cylinder, wherein after the electrode is inserted into the cylinder of the cylinder block so as to make the air joint abut against the seal jig, the end of the cylinder inner wall surface closer to the crankcase surface being the one end of the cylinder inner wall surface is sealed.