The DN 33 Draw Strip/Draw Bead Tester comprises a long stroke electro mechanical ball screw actuator mounted horizontally on a steel bed plate in line with a tooling fixture. The actuator has an integral LVDT for displacement measurement and is controlled by means of a standard a.c. vector drive with encoder feedback.
The tooling fixture comprises two articulated arms, each carrying one half of a draw tool. The arms are connected to a fixed point on the machine bed-plate by means of a force transducer, in such a way as to measure the combined drawing force on the arms. The clamping force on the draw tool is by means of a hydraulic cylinder with force transducer feedback and controlled by means of a proportional control valve.
The standard specimen is a long strip of material of up to 25 mm width, which is connected to the actuator by means of standard mechanical grips.
Control and Data Acquisition
Control and data acquisition is provided by means of Phoenix Tribology’s standard COMPEND 2000 control and data acquisition system in conjunction with a 16 bit Data Translation control and data acquisition card. The maximum data acquisition rate typically used is 2 kHz.
Drawing Speed: 200 to 2,000mm/min Speed Resolution: +/- 1% of maximum speed Specimen Force: 25 kN maximum Drawing Force: 20 kN maximum Tool Size: 35 mm x 45 mm (typical) Tool Finish: 0.05 – 0.02 microns Ra Contact Conditions: Flat on Flat Cylinder on Flat (sliding) Cylinder on Flat (rolling) Draw Bead Fixed Bead/Roller Bead Specimen Size: 500 mm long x 25 mm wide Load Cell: 30 kN (fatigue rated) Power Pack: 2 l/min at 210 bar Interface: Serial Link Interface Module Software: COMPEND 2000 Automatically Controlled Parameters Drawing Speed Specimen Load Measured Parameters Drawing Speed Specimen Load Drawing Friction Force Drawing Displacement Services Electricity: 220/240V, single phase, 50 Hz, 7.5 kW 110/120 V, single phase, 60 Hz, 7.5 kW Installation Floor-standing: 900 mm wide x 600 mm deep x 1,200 mm high, 250 kg Control cabinet: 530 mm x 800 mm x 300 mm high, 20 kg
draw bead draw strip drawing force drawing lubricants forming lubricants plastic deformation roller bead stick-slip
POSCO Korea Hyundai Korea
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