PDS series of single-servo CNC bending machine adopts steel plate integral welding structure, good rigidity, high strength and good resistance to distortion and deformation, and through the body of the overall tempering/surface shot peening process to eliminate internal stress, to ensure the lasting stability of the overall accuracy of the machine tool
1. single servo CNC bending machine Rack performance
New rigid design, finite element optimization analysis, minimize the impact of bed deformation on bending workpiece quality.
The frame adopts steel plate integral welding structure, good rigidity, high strength and good resistance to distortion and deformation, and through the body of the overall tempering/surface shot peening process to eliminate internal stress, to ensure the lasting stability of the overall accuracy of the machine tool.
The processing of the frame is completed by the Spanish pentahedron processing center at one time to ensure the levelness and verticality of the mounting surface. In this way, the workpiece has excellent straightness and Angle consistency.
A "C" shaped plate mechanism is arranged at the throat of the frame to directly detect the distance between the upper and lower molds to ensure the precision of the parts.
2. Hydraulic system
With German Rexroth Rexroth closed-loop hydraulic system (electric liquid proportion servo synchronization control system), the system is a kind of position control system, it through the grating ruler to dynamically detect the slider of the synchronization error, and by the numerical control system of electrohydraulic servo valve synchronization error correcting slide block, make the slider in the case of partial load have always been able to keep in parallel with the workbench, Slider synchronization accuracy ≤±0.02mm.
Main motor for high performance servo motor, USES the whole closed-loop electro-hydraulic servo system on-demand oil supply, the pressure and flow signal presented by the CNC numerical control system to drive side, the analog signal through the pressure sensor and speed sensor feedback real-time tracking the flow and pressure changes, the monitoring process and correction signal feedback to drive fast, It is an advanced control method with closed loop and no overflow. The advantages are energy saving, low oil temperature, environmental protection and high efficiency.
The bottom dead point has holding time, programmable, to ensure the accuracy of different parts;With the function of slow return control, the operator can better control the workpiece; The sealing parts in the cylinder are American Parker with strong sealing and long service life. Hydraulic system fittings and joints adopt German JS, with good quality and strong performance;
The hydraulic system has overload overflow safety protection; Highly clear and intuitive display of oil level;
3, grating ruler
Fagor grating ruler made in Spain is selected. The high-precision guiding system and closed-loop control of position measurement system can meet the processing needs of full-length or off-load. Y1 and Y2 axes -- the left and right sides of the slider are equipped with high-precision grating rulers, which are used to determine the accurate position of the slider and the workbench. The grating ruler installed on the C-shaped frame will not affect its measurement accuracy due to the elastic deformation of the frame, and the accurate position data will be fed back to the NUMERICAL control system, which can calculate the output servo valve control signal (S1, S2). Thus the slider positioning accuracy ±0.02mm, repeat positioning accuracy ±0.01mm
4. Rear stopper assembly
X-axis is the rear stopper control axis, using ESTUN servo motor and imported HIWIN precision ball screw drive and ball linear guide rail positioning, so that the X-axis drive positioning accuracy ≤±0.1mm. The two blocks in motion always keep synchronized, to ensure the accuracy of the workpiece.
Axis R is the upper and lower control axis of rear stopper, using ESTUN servo motor and imported HIWIN precision ball screw drive and precision guide rod up and down support guide, so that the upper and lower positioning accuracy of axis R is ≤±0.1mm. Make the rear stopper up and down to keep synchronized, to ensure the accuracy of the workpiece.
5, the whole system of standard mechanical compensation (2500mm and above models)
In order to ensure the bending accuracy of the workpiece, the oblique wedge type mechanical deflection compensation mechanism controlled by numerical control system (plus convex control shaft V axis) is designed to compensate the deformation of the slide plate and the workbench plate under load. The principle of WILA mechanical compensation can be used to form a cluster of ideal convex lines to realize the complement of WANMEI on the whole length to ensure the quality of workpiece processing requirements.
6. Electrical components
The main electrical components of the machine control system are Schneider Schneider products from France, and the main sealing parts of the hydraulic system are imported from Europe and America.