315-ton double action stretcher fire extinguisher metal forming press

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Introduction of hydraulic press

The 315-ton double-action stretching machine is a kind of hydraulic equipment used for deep drawing of metal sheets. It is mainly used to manufacture drawn parts with complex shapes and large depths.

The core difference between the double-acting stretching machine (also known as "double-acting hydraulic press") and the single-acting stretching machine is its double-cylinder drive design:

The main stretching cylinder: provides downward stretching force to pull the plate into the female die for forming;

The blank-pressing cylinder (or blank-pressing slider): provides upward blank-pressing force to prevent the edge of the sheet from wrinkling during the stretching process (especially suitable for deep drawing or thin sheet)

1. Body (Rack)

The frame structure (such as four-column, gantry or integral cast steel frame) is adopted to ensure high rigidity and partial load resistance, and to withstand huge stress during stretching.

The body requires high accuracy (such as guiding accuracy) to avoid parts scrapped due to slider offset during stretching.

2. Hydraulic system

Double cylinder configuration: the main stretching cylinder (lower or upper) and the crimping cylinder (usually integrated in the slider or set independently), powered by the hydraulic pump station.

Hydraulic control: proportional valve or servo valve is used to realize the synchronous adjustment of the pressure edge force and the stretching force (such as the pressure edge force changes dynamically with the stretching stroke) to ensure the forming quality.

3. Control system

With PLC (programmable logic controller) as the core, with human machine interface (HMI), can achieve:

Accurate setting of stretching stroke and pressing force;

Automatic/manual mode switching;

Overload protection (e. g. pressure overrun, travel limit);

Production data records (e. g. times, parameters).

4. Mold system

The drawing die (concave die, convex die) and the holder ring shall be matched. The die material is mostly alloy tool steel (such as Cr12MoV steel), and the surface is treated with heat treatment or coating (such as TD treatment) to improve wear resistance.

The mold installation shall be coordinated with the fuselage guide system to ensure the mold clamping accuracy.

Technical parameters

pressing process

Suppression case