Key Points of Structural Design of Progressive Die for Electronic Connectors

①The overall structure of the mold 　　 the progressive mold base wood frame is composed of three elements: working mold front, inverted relationship, unloading method, and guiding method. According to the structural analysis of the parts, it can be seen that the wooden mold is more suitable for adopting a formal installation structure, the convex mold is installed on the upper mold through the upper mold fixing plate, and the concave mold is fixed on the lower mold. The size of the part is small, and the corresponding punch size is also small. Therefore, in the actual production of the mold opening and closing, the discharge plate should have a certain guiding effect on the punch. This requires high movement precision of the unloading plate, so it is necessary to use small guide posts and small guide sleeves to guide the unloading plate, and the upper and lower molds use standard ball guide sleeves and guide posts for general guidance. The elastic pressure unloading plate is selected for unloading, which has good openness, the unloading force can be adjusted, and has the function of pressing. ②Material guide and guide mechanism design The feeding mechanism of the wooden mold is an automatic feeding mechanism, and the gap between the feeding distance and the step distance is small. Therefore, it is only necessary to set the guide nails in some important positions to ensure the feeding The distance is consistent with the step distance.　　 In order to ensure that the strip can be fed forward smoothly in the mold, a floating guide pin is used in the design. Through it, the strip can rise a certain distance after moving on the upper mold, and completely leave the concave (lower) mold, thereby ensuring the feeding of the strip. In order to prevent the misfeeding of the compared strips and the inadequate delivery of the process parts, a detection nail is set in the mold. Once the above situation occurs during the mold work, the downward movement of the detection nail will be blocked. At this time, the detection rod and micro-movement are used. The switch is shut down in time to achieve the purpose of protecting the mold. ③The design of blanking die design waste material jump up and block the leaking hole is one of the main reasons for mold damage or even scrapping. Combining the measures to prevent the waste material from jumping up and blocking the leaking hole and the above factors, choose the double cone type The cavity structure. The material of the part is brass with a thickness of 0.4mm. The forming force and friction force during the working process are small, and the strength of the die is not high. The use of a tapered blade has little effect on the accuracy and life of the die. . ④Die fixing plate design During mold assembly, in order to be able to more accurately adjust the gap between the male and female molds, according to the requirements of high precision of the blanking part of the workpiece and relatively low precision of the bending part, the female mold is fixed The board is divided into 3 relatively independent boards, which is convenient for adjustment and can also reduce the requirements for processing accuracy.