过去我厂生产的带防尘盖向心球轴承,采用如图42结构的防尘盖。这种防尘盖与轴承装配后,铆紧率低,外径尺寸超差,振动、噪声值增大。为了解决这些问题,我们设计了如图43结构的防尘盖。这种防尘盖装配铆紧率达98％,尺寸符合GB307—77要求,振动值符合部颁标准。生产这种防尘盖,经落料、弯边、卷圈三道工序完成。由于开料毛刺大,对弯边、卷圈成形带来困难。为此,必须设法消除工件落料后的毛刺。 In the past I produced with dust cover radial ball bearings, dust cover as shown in Figure 42 structure. This dust cover and bearing assembly, the rivet rate is low, outside diameter size tolerance, vibration, noise increases. In order to solve these problems, we designed a dust cover as shown in Figure 43. This dust cover assembly riveting rate of 98%, the size in line with GB307-77 requirements, the vibration value in line with the ministerial standards. Production of this dust cover, the blanking, bending, wrapping three processes completed. Burr as a large opening, on the curl, roll forming difficulties. To this end, we must try to eliminate burrs after blanking the workpiece.