High-Speed, High-Precision Machining Based on Excellent Functions
Questing for unparalleled original technology, TOYO sets another milestone in the history of press brakes. TOYOKOKI, a pioneer in press brake design for over 50 years, has reached a new milestone with the HYB Series ."Hybrid" press brake series.
The hybrid brake was developed by combining the best aspects of our conventional hydraulic brake with our AC Servo brakes to produce a new machine capable of bending all types of metal with a ram repeatability of several microns. Although the HYB uses hydraulic pressure to move the ram, the oil is delivered by an AC servo motor pump which does not rely on valve operation for precision control nor subject to variations in oil temperature and pressure.
Features of hydraulic press brake
The refined hydraulic circuit allows you to easily change the ram speed and pressure. Immense power and high speed can be generated with the input of only a small amount of energy.
Features of AC servo press brake
A ball screw drive and AC servomotor is a standard combination used for precision control, enabling extremely high repeatability and stopping accuracy to the micron level.
A conventional brake pump always dispenses oil even when the machine is not operated. The HYB pump is only active during ram cycling and therefore more efficient and cost effective.
Monitoring position and speed
An essential function of the hybrid control is ultra-high speed scan control that allows for micron-level monitoring of the ram's position and speed 1000 times a second. Therefore, high repeatability and stopping accuracy of -0.003 mm is consistently obtainable without being affected by oil temperatures and pressure changes.
The hybrid hydraulic circuit does not require flow rate control by the valve and only dispenses the amount of oil necessary for machine operation. Accordingly, energy consumption is only 50% of conventional models,
A conventional brake pump always dispenses oil even when the machine is not operated. The HYB pump is only active during ram cycling and is therefore more efficient and cost effective.
Two layers of independent wedges create two different correction curves. The CNC unit calculates automatically the proper combination that will produce the best final crown for the bending condition at hand.
between side frames]
Ram (Bed) is deflected as indicated by the red line.
between side frames]
Ram (Bed) is deflected as indicated by the red line.
The Sheet Thickness Detection Position (the ram position where the upper die contacts the sheet) is the origin point for bending angle calculations. The machine computes a distance between the origin point and the position where the ram needs to be lowered in order to obtain the required angle.
Any difference in sheet thickness is detected through the measurement of the thickness detection point for each workpiece, so that the lower dead center (the final ram slop position to obtain a target angle) can be automatically controlled.
The linear scale reads the position of the ram where a certain load
is applied because the upper die has made contact with the sheet.
This position is compare with the sheet thickness detection position
registered when the program was created. The difference between
these positions is regarded as the sheet thickness error.
When a sheet thickness error is detected, the CNC unit
calculates the correction required and automatically adjusts
the bottom dead center.
The high-speed, high-precision 5-axis (or 7-axis) controlled back gauge can be equipped with a tilt calculation function to perform higher precision bending operations. This function allows for easy and accurate tilt correction up to the level of 0.01 mm regardless of where the back gauge is used.
Gauge Stopper
Standard Stopper
Stage bending causes uneven left and right C-frame deflection due to off-center loading. On conventional machines, the upper ram tilts unevenly with the C-frames. On the HYB, however, the CNC unit computes the ram stroke adjustment needed to keep the ram parallel to the lower table based on bending position and sheet width. Further correction after forming is easily accomplished by only entering the left and right resultant angles.
