![]() This also means that the energy used in the process of manufacturing the material is wasted, and therefore it is not an eco-friendly production method. Although it is possible to sell the punching waste as scrap metal, the selling price is cheap. The punching waste increases for thicker plates and with larger pitches. In contrast, in the case of press working using pre-plated metal strips, it is not possible to have the sheared surfaces plated.Īs for material waste, the processing of wire does not generate punching waste as would be generated by press working. With regard to plating, when using pre-plated wire, it is possible to maintain the plating evenly on all four side surfaces of each terminal. This is also an advantage of using wire because, in the case of press working using metal strips, it will be necessary to make new dies, or at least modify the dies. Accordingly, initial investment costs can be significantly reduced.Īs for different lengths of connector terminals, they can be handled simply by adjusting the processing machine. The initial cost of dies can be held down to roughly one fifth to one tenth. To be more specific, the dies used with the automatic pin processing machine to form wire are smaller than those for press working and have simpler structure and configuration therefore, (5) Cross-sectional shape of wire drawn by dies remains in shape (cross-sectional shape of the terminal does not deform or warp). To reducing cost and environmental impact. (4) Metal waste, which is typical of press working, is not generated, which contributes (3) Plating can be applied securely to all four sides of each terminal. (2) Equipment can be adjusted to process terminals with different lengths without having (1) Initial cost of dies is significantly smaller than that of press dies. In addition, press working involves relatively large force applied to the metal strips for shearing (punching) them, causing the profiles of the connector terminals to become somewhat deformed. ![]() Which constitutes a negative factor for manufacturing products that have a short life cycle, products with uncertain demand, and low-volume production items. ![]() These dies tend to be significantly more expensive than wire heading dies (for headed terminals) and machining tools and fixtures (for machined terminals), With respect to the initial costs for the equipment, the presswork requires relatively strong and rigid dies, and high-precision dies depending on the products to be formed. The cut-off surface by press working is apt to have fractured sections with rough surface conditions and tiny burrs on the edges. With regard to the shapes and surface conditions, Therefore, if plating is necessary for the purpose of preventing oxidation or corrosion, non-plated metal strips should be used,Īnd the plating should be applied after the press-forming process. Which leads to material loss and can be a cost-increasing factor.Īs for plating to press-formed terminals, if a pre-plated metal strip, to which plating has been applied in advance, is used, the cut-off surfaces will not be plated,Īnd bare metal will be exposed after the press-forming process. On the other hand, this process involves the generation of punching slugs as a result of blanking the metal, Furthermore, press working can also be used to make high-precision items,Īs is shown by the fact that this method is used to manufacture terminals for narrow-pitch connectors that require high-precision processing, such as board-to-board connectorsĪnd FPC connectors used within smartphones and other mobile devices. Press working is a relatively high-speed manufacturing process suited for mass production. Using commonly available standard metal strips (hoops), which are supplied in large quantities in the market, means that the material can be acquired at a relatively low cost. Connector terminals made by press working out of metal strips
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