Process of Straightening with 3-point and 4-point Bending for Curved Brass Rack

抄録

Racks are usually curved after cutting gear teeth. The straightening process is required to correct the machining distortion. In this study, the process of straightening a curved rack with 3-point and 4-point bending was examined to automate the correction. 3-point and 4-point bending are used for straightening. The relation between load and deformation was plotted in real time to determine the unloading point for the precise correction. The parameters of the relationship between load and deformation are important for precise correction. The load and the deflection at the center loading point are proper for 3-point bending. In the case of 4-point bending, the bending load and the bending angle should be chosen.