Reduction of Blanking Noise by Controlling Press Motion

Influence of blanking distance of materials on increase in blanking vibration using screw drive servo press

“…On the other hand, some factories have reported that the blanking noise of a screw drive servo press is larger than that of a crank press. (Otsu, et al, 2003) reported that a blanking in low velocity has an effect on reduction of blanking noise. (Murakawa, et al, 2001) and (Ghiotti, et al, 2010) reported a technique of the reduction in blanking vibration by a damper.…”

Hybrid-loop servo control system of double toggle mechanical press for flexible forming process based on sliding mode control and neural network techniques

“…1 Furthermore, various complicated forming processes can be realized since the punch motion trajectory can be controlled flexibly by the servo motor, which would not only improve the dimensional accuracy and productivity effectively 2 but also eliminate forming defects, 3 extend die life, and reduce forming noise. 4 In the servo press, appropriate transmission mechanisms between the motor and the punch should be designed to meet the stamping loadings and reduce the power demand of the motor. 5,6 Our research group has proposed a novel symmetrical double crank-toggle mechanism and its optimization design in the previous works.…”

Prevention of galling in forming of deep hole with retreat and advance pulse ram motion on servo press

“…Servo press with flexible ram motion has led to new forming processes such as extrusion against counter tool for improving the geometrical defects [3], blanking with low noise [4], shearing with reduced burrs [5] and sheet forging with reduced friction [6]. In this study, a forming method for deep hole utilizing a servo press and a punch having an internal channel for liquid lubricant is proposed.…”