接触刷(图1)是电位器的一个重要零件,它的尺寸、形状的正确与否,对电位器的性能和寿命都有较大的影响。 以前冲制该零件是采用两副模具完成。第一副级进模是:冲孔、落料(并推回带料),压凸包,推下零件。第二副:弯曲成形。为了提高效率,在八三年改为一副模具 Contact brush (Figure 1) is an important part of the potentiometer, its size, shape is correct or not, the performance and life of the potentiometer have a greater impact. The parts were punched before the use of two molds to complete. The first deputy progressive die is: punching, blanking (and push back the material), embossing package, push the parts. Second vice: bending forming. In order to improve efficiency, it changed to a mold in 1983