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Analysis of Processing Technology of Connector Terminal Mold

Jun. 26, 2018

With the rapid development of society and rapid technological advancement, the electronics industry has also achieved considerable development, and the range of applications for connector terminal molds has also been continuously expanding. According to statistical data, the common areas of the global connectors application include automobiles, computers, communications, industry, aerospace and military. With the development of electronic products, people have higher and higher requirements for their functions, accuracy, volume and cost. As one of the main components of computer connectors, the terminals has gradually become more and more precise in its processing and manufacturing of forming dies, and its requirements in terms of step length, material thickness and the like have become increasingly strict.


1. Processing process of computer connector terminal mold


The computer connector terminal mold has its basic structure. Its main structure is composed of a combination of nine templates. The main working part is made of high carbon steel and alloy steel; the upper mold base, cover plate and lower mold base are made of steel S50C (or steel 45) material. The whole mold adopts a pre-pressed structure. Its main feature is that the discharge spring is located in the upper mold holder. Comparing with the traditional design form (the discharge spring is located between the upper template and the discharge plate), this design form can effectively maintain the balance state of the stripper plate when disassembling or locking, so as to avoid the occurrence of tilting phenomenon; secondly, in the stamping production, if problems such as mistransmission of materials or rising of waste materials are encountered, the gap between the stripper plate and the die can be effectively maintained without any change, so that the minor faults in the production and processing will reduce the impact on the life and accuracy of the die to a minimum; thirdly, the small bending punch, die and material unloading part are all in an insert-type structure, which is conducive to the maintenance of the mold in the subsequent stamping production, and can also facilitate the change of the engineering in the manufacturing process.


The molds must be designed before they are processed and manufactured. After the design has been reviewed and approved, the molds can be processed.


2. Common problems in computer connector terminal molding

2.1 Dust occurrence during processing


In the process of mold processing, sometimes the punch will cut out the metal burr on the lower mold surface when it is working, which will cause the deformation of the lower surface of the material strip or the phenomenon of crushing. This is mainly due to recutting or punch collapse. Recutting is the phenomenon of partial overlap between the contours before and after blanking the die during die machining. The back punch scrapes metal chips on the cut edge, or punches the edge of the die to make the edge serrated and cuts the material with dust out. Under normal circumstances, recutting needs to replace the punch. The punch can be replaced or repaired.


2.2 Banding phenomenon occurs during processing


The connector terminals of the finished product are generally transported to the electroplating and assembly plant by means of a disc-mounted paper package. In the production process of terminal dies, the phenomenon that the material ribbon is in a certain fan shape often occurs. This is mainly due to the inconsistency between the deformation of the front and rear ends of the positioning circular hole. Belt fan problems not only affect the plating area of the terminals, but also have an adverse effect on the assembly speed and assembly quality. If this problem occurs, it is generally resolved by a larger correction.


2.3 Skipping occurs during processing


The punch intrusion material enters the die at the time of punching. Due to the problem that the punch enters the die at too small a depth and the die wears, the head of the punch and the material appear to be in a vacuum state, or in the punch. In the case of high speed return stroke, due to the reasons such as simple punching profile and high punching speed, etc., the punches are subjected to the phenomenon of adsorbing the material, jumping out of the die, and causing the running material to deform or crush.

Analysis of Processing Technology of Connector Terminal MoldAnalysis of Processing Technology of Connector Terminal MoldAnalysis of Processing Technology of Connector Terminal Mold

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