Equipment Instructions

A four-column (4-post) structure stamping Hydraulic Press is a heavy-duty industrial machine featuring a rigid three-beam/four-column frame, powered by a hydraulic system to perform high-precision stamping, deep drawing, bending, and forming operations on metal and non-metal materials. It is widely used in automotive, aerospace, household appliance, and sheet metal processing industries due to its excellent load-bearing stability and parallelism control.

Core Structure & Components

Frame System: Classic three-beam (top crown, moving ram/slider, fixed worktable)+four vertical columns (chrome-plated, high-tensile steel, locked by large nuts). The columns provide precise guidance via self-lubricating bronze/graphite bushings, ensuring minimal deflection under heavy tonnage.

Hydraulic System: Main cylinder (typically mounted on the crown), hydraulic power unit (oil tank, high-pressure pump, motor, valves), optional bottom cushion cylinder/knock-out for part ejection.

Control System: PLC+touch screen, with multi-stage speed control (fast approach, slow pressing, fast return), pressure/position dual closed-loop control, and safety interlocks (light curtains, emergency stops).

Safety & Auxiliary: Protective mesh, overload protection, die clamping, T-slot worktable, and optional heating/cooling systems.

Working Principle

The electric system starts the hydraulic pump to build up pressure.

The slider (ram) moves down quickly to approach the workpiece.

Switches to slow, high-pressure stamping/forming when in contact with the material.

Holds pressure for a set time (if needed) to ensure shape retention.

The slider retracts rapidly, and the cushion cylinder ejects the finished part.

Key Performance Advantages

Superior Rigidity & Parallelism: Four symmetric columns minimize frame deformation, ensuring uniform force distribution, which is critical for deep drawing and large-part stamping.

Four-Sided Access: Unobstructed loading/unloading from all directions, facilitating automation integration (robotic arms).

Flexible Tonnage & Stroke: Standard capacities range from 63 tons to 2000+ tons, with customizable stroke, open height, and table size.

Energy Efficiency: Modern servo-hydraulic systems reduce power consumption compared to traditional constant-speed pumps.