Blanking is one of the common processes of stamping processing and production. In the traditional blanking production process, the operator selects the metal strip that needs to be cut into sheets, and then manually sends one sheet into the punch equipped with a single blanking die for stamping processing and production. The production process is complex and requires a lot of manpower to make sheet metal strips. For mass production, The traditional single blanking method has low production efficiency. In addition, a large number of leftover materials will be produced in the process of making sheet metal strips, which wastes raw materials and can not meet the needs of modern processing and production.
The popularization of punch feeder fundamentally solves the problems of low production efficiency and large material waste of the traditional single blanking process. After the punch feeder is used with the blanking progressive die of the punch, the coil feeding method is adopted, which eliminates the operation that the traditional stamping blanking must be cut into long strips of metal. The operation is more convenient and avoids the waste of leftover materials in this process, Compared with the traditional processing method of single blanking die, progressive blanking processing can improve the production efficiency by 2.5-6 times and save 10-20% of raw materials. Moreover, since the raw materials of progressive blanking processing are coil materials, when the feeding machine of punch press is used with the blanking die, it can realize automatic feeding and cut off the waste through the cutter, which is convenient for the operator to collect the waste. Working principle of progressive blanking process: compared with the traditional single punch blanking die, the blanking progressive die is added with a stop sensor and a stop sensor. The stop sensor is used to send a stop signal to the punch to stop the downward movement after sensing the downward movement of the upper die to the downward preset position; The stop sensor is used to send a stop signal to the punch to stop the upward movement after sensing the upward movement of the upper die to the upward preset position, and send a feeding signal to the punch feeder of the punch for feeding action at the same time. Among them, the lower surface of the upper die of the blanking progressive die is fixedly connected with the inner guide column, the position corresponding to the inner guide column on the lower die is provided with a guide hole to accommodate the inner guide column, the check sensor is arranged at the lower part of the guide hole, and the lower part of the guide hole is the preset downward position; The two sides of the upper surface of the lower die are fixedly connected with the outer guide column, and the corresponding position of the upper die and the outer guide column is provided with a guide groove containing the outer guide column. The non-return sensor is set at the upper part of the guide groove, and the upper part of the guide groove is the up preset position. The blanking progressive die is provided with a plurality of blanking punches and concave parts on the upper die and the lower die respectively. In particular, the equidistant staggered distribution can be used to punch multiple blanking parts on one plane at the same time. This distribution of stamping parts can ensure that the pressure of each pressure part is balanced during stamping, so as to prevent the problem of inconsistent shape of blanking finished products due to uneven stress, This also ensures the feeding accuracy of the punch feeder
