KOYO bearing blank blanking technology

The first step of blanking is forging. Quality of blanking the weight and size of accurate or not, the stand or fall of cross section geometry, etc, will directly affect the quality of the forging process and forging. KOYO bearing with high-speed upset forging machine, forging machine with slide block transfer press forging production line, such as the production line with bar directly forging KOYO bearing ring, thus the relatively small number of blanking. In order to improve the geometric accuracy and weight of the cutting precision, it is to carry on radial compression bar, the second is to improve the cutting speed. And foreign blanking equipment automation degree is higher, generally has the makings, feeding, automatic eliminate head, automatic monitoring device. Because the cutting method is basically the traditional open cut, poor quality of blanking, the weight difference is around 5%, far greater than 3 ° transverse gradient. Therefore, the domestic manufacturers are exploring some new methods. For most domestic manufacturers, generally is the application of single point press with abrasive material under shear, as a result, the grinding tool made a lot of good work on the improvement of blanking quality is mainly influenced by shear bar when axial channeling move and the influence of warping, therefore, the sleeve shear modulus. Even if the shape of the shear blade and moving blade and bar cross section shape is the same, to limit the shear bar warp and blades for bar shear flattening, improve the shearing quality obviously. In practical production, the cold blanking weight general control in 1%, collapsing the depth of 0. 5 mm, transverse slope is less than 2 ° 30 '; Material for heat difference within 2% by weight, transverse slope is less than 3 °. Shear modulus. Is made in the form of radial press bar warp, axial channeling move and flattening of incision are restricted. This way only in constant dao end tightening, some in the constant dao and dynamic end are to be stepped up, its tightening way has cylinder type, also have institutional linkage. Blades are made with bar cross section shape of the same shape, in addition, the grinding tool can be automatically sent to the device. This way the general blanking weight control within 1%, the slope is less than 2 ° of area. Bar eagerly machine use is also growing, basic is in the form of the production line running. Using medium frequency induction heating, automatic feeding, automatic feed, ( The individual with) Automatic detection, such as high degree of automation, and radial shearing machine has the automatic tightening device, the fuselage rigid, keep-off adjustment functions, such as shear quality of old shearing machine has greatly improved than before, can achieve shear weight error is not greater than 1. 5%, slope section within 3 °. Band saw cutting is foreign products, has been used in China. The adoption of high rigid structure, band saw guide the orientation and reliable; Feed control guarantee the stability of low speed stability and cutting force in the work; Bar to reliable, etc. Thus, make the precise blanking weight, end face of good quality, and wide scope of blanking.