Hydraulic cylinder and system with pressure intensification

A hydraulic pressure cylinder system, comprising:

• a pressure cylinder including a working cylinder and an intensification cylinder divided by a separator block, a working piston arranged in the working cylinder and connected to a working rod extending to an end portion, the working piston separating the working cylinder into an advance working chamber and a retract working chamber, an intensification piston and an intensification rod arranged in the intensification cylinder, the intensification piston separating the intensification cylinder into an advance intensification chamber and a retract intensification chamber;
• a pump configured to provide a pressurized hydraulic fluid to the pressure cylinder;
• a fluid reservoir configured to supply a hydraulic fluid to the pump;
• a first valve configured to selectively regulate hydraulic fluid flow between the pressure cylinder and the fluid reservoir and the pump;
• a second valve configured to selectively regulate fluid flow between a first valve and the advance intensification chamber;
• a pressure sensor in fluid communication with the advanced working chamber, the pressure sensor configured to produce a signal corresponding to a pressure within the advance working chamber;
• and
• a controller in communication with the first valve, the second valve and the pressure sensor, the controller configured to coordinate movement of the working piston and the intensification piston between a rest state, an advancing state, an advanced state, an intensified state, and a retracted state, wherein the advanced state is configured to engage the end portion with a workpiece, and the intensified state is configured to perform an operation on the workpiece with the end portion, the controller configured to monitor the signal and to command a motor driving the pump to maintain the pressure between first and second pressure thresholds.

A hydraulic pressure cylinder system, comprising:

• a pressure cylinder including a working cylinder and an intensification cylinder divided by a separator block, a working piston arranged in the working cylinder and connected to a working rod extending to an end portion, the working piston separating the working cylinder into an advance working chamber and a retract working chamber, an intensification piston and an intensification rod arranged in the intensification cylinder, the intensification piston separating the intensification cylinder into an advance intensification chamber and a retract intensification chamber;
• a pump configured to provide a pressurized hydraulic fluid to the pressure cylinder;
• a fluid reservoir configured to supply a hydraulic fluid to the pump;
• a first valve configured to selectively regulate hydraulic fluid flow between the pump and the advance working chamber and the retract working chamber, the pump selectively fluidly connected to the retract working chamber and the retract intensification chamber through a retract passage via the first valve;
• an air source configured to provide pressurized air;
• a second valve fluidly connected to the air source by another valve, the other valve configured to selectively provide the pressurized air to the second valve, wherein the second valve is configured to selectively regulate an airflow between the air source and the advance intensification chamber and the retract intensification chamber;
• an overpressure circuit fluidly connecting the advance working chamber and the retract passage, a pressure relief valve arranged in overpressure circuit, wherein the pressure relief valve is configured to open from a normally closed position to communicate fluid from the advance working chamber to the retract passage when the advance working chamber reaches an undesired threshold;
• and
• a controller in communication with the first valve and the second valve, the controller configured to coordinate movement of the working piston and the intensification piston between a rest state, an advancing state, an advanced state, an intensified state, and a retracted state, wherein the advanced state is configured to engage the end portion with a workpiece, and the intensified state is configured to perform an operation on the workpiece with the end portion.