Digital Control with Siemens Touchscreen Display
With the Siemens touchscreen display you can set the following parameters:
- Maximum upstroke and downstroke of the hydraulic cylinder
- Pressure maintenance time on the lower platform
- Work pressure
- Decompression time
- Piece counter
- Prestop ascent/descent: function that allows you to stop the ascent or descent before reaching the quota, thus eliminating errors caused by speed and cavitation due to the weight of the mould. It guarantees an accuracy of 0.1mm.
- Alarm management
There is the possibility of storing 100 different programs with a progressive number.
You can choose between manual and automatic modes.
In automatic mode the cylinder rises automatically.
The stroke is read using a wire encoder.
The pressure is read using a transducer installed on the hydraulic control unit.
Hydraulic Cushion
The hydraulic cushion has the task of counteracting the force of the main cylinder and thus slowing down its descent, allowing the sheet metal to be stretched to create the piece.
It is particularly used for deep drawing processes, i.e. in those operations carried out cold on flat metal sheets to transform them into more or less complex concave shapes.
The hydraulic cushion is placed under the lower fixed table of the press and is composed of a main cylinder, a fixing flange, a mobile table that slides along 4 self-lubricating guides and the stems that pass through the holes of the lower fixed table .
Under the table top, there is an opening door for adjusting the cylinder stroke using the microswitches or encoder (on request).
There is also a safety sensor that prevents damage to the hydraulic cushion in the event of incorrect pressing via the main cylinder and an additional safety sensor placed on the door, which inhibits the movements of the press if it is opened during the cycle. of processing.
Available with force from 20 to 80 tons.
Pressure Switch
The pressure switch is a sensor that monitors the pressure of the hydraulic fluid within the system.
Its main function is the regulation of the maximum working pressure, based on the preset calibration, thus optimizing the operation of the hydraulic press based on the processes that need to be performed.
In the automatic version of the presses, it allows the automatic lifting of the hydraulic cylinder when the calibration pressure is reached.
Air/oil Heat Exchanger
The air/oil heat exchanger is used to cool hydraulic circuit of the press and uses ambient air as a cooling source, which is conveyed onto the circuit via a fan.
It serves to prevent overheating of the hydraulic circuit and to maintain a constant oil temperature, thus avoiding damage to the hydraulic system and seals.
It is a particularly recommended accessory when the press needs to work continuously or for long production cycles.
When we install the heat exchanger we also mount the decompression valve to safeguard the cooling system.
On large tonnage presses we also mount the exchanger with recirculation and separate motor, for greater cooling effectiveness.
Photoelectric Barriers
Photoelectric barriers are safety tools that create an invisible protective barrier through the use of infrared rays.
They are configured to immediately stop the pressing process if the operator or any object comes between the photocells.
The barriers are protected by sheet metal and aluminum mesh and this configuration also allows the minimum distance from the end of the work surface to be respected.
Thanks to the photoelectric barriers, a protected work area is created and this makes it possible to operate the hydraulic press with a single button (or with a pedal), without the need for simultaneous two-hand control.
Timer
The timer is very useful for various molding operations as it allows the operator to adjust the time the hydraulic press remains closed.
It is adjustable by hand using a special wheel or it can be set digitally in the models of hydraulic presses equipped with digital control.
On request, it is also possible to keep the pressure level constant throughout the closing time.
Piece Counter
The piece counting device accurately counts and records each pressing cycle, allowing efficient production monitoring by controlling the quantity of parts produced.
The data of the pieces produced are displayed on a special digital display.
Decompression Valve
The decompression valve has the task of decompressing the pressure accumulated in the hydraulic circuit and comes into operation just before the hydraulic cylinder rises, thus avoiding overloads and preventing potential damage to the machine.
When the tamping cycle is completed or when the stop command is released, the decompression valve opens, allowing the hydraulic fluid to return to the reservoir in a controlled manner. This process ensures that the hydraulic cylinder stops safely and there are no sharp or sudden movements.
Essentially, this accessory protects the hydraulic circuit of the press and is particularly recommended when working at high pressures.
Four Slide Guides
The four self-lubricating sliding guides are placed in the corners of the upper mobile surface and allow correct descent of the work surface and precise execution of the molding operations.
They are mounted as standard on hydraulic molding presses with high approach speed and on HSP and HSPMD models starting from 300 tons. On these latest models, it is possible to install the four self-lubricating sliding guides as accessories also for the 40 to 200 ton versions.
Sliding Protection Nets
The sliding side protection nets have the main function of preventing unauthorized or involuntary access to the pressing area, minimizing the risk of serious injuries and ensuring the safety of the operators.
Made of aluminum, the sliding nets are very useful for having lateral access to the machine, both for positioning the molds on the work surface and for positioning the piece to be machined.
They are equipped with safety sensors, so that the electro-hydraulic press only works when the protective sliding nets are completely closed. In case of opening of the nets during the pressing phases, the safety sensors immediately block the workshop press.
Pressure Block Valve
The pressure lock valve has the function of maintaining the pressure constant for the entire pressing time which has been preset.
This is a highly sought-after molding feature for materials that need to remain under constant pressure for a specific period of time to achieve the required level of deformation.
The pressure relief valve is installed at the top of the cylinder and acts like a tap. In fact, it has the function of preventing small oil leaks from slowly exiting the cylinder and returning to the hydraulic circuit, thus causing a progressive decrease in pressure.