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Points of attention for copper castings during processing

Update:15 Nov 2019
Summary:

With the maturity and advancement of technology, some s […]

With the maturity and advancement of technology, some special processing and processes have been developed for copper castings, including high-precision copper strips, ultra-thin electrolytic copper foil inner particle reinforced oxides, metals, laser surface strengthening, semi-solid forming. , shaping casting, particle enhancement particle control and more.

During the processing of copper castings, the cold kneading skill is an important part of plastic forming. The so-called cold kneading refers to placing the copper blank into the mold cavity in the cold state under the action of strong pressure and certain speed. The copper is forced out of the cavity to obtain the desired shape, size, and kneading member having a certain mechanical property.

Like the high-precision copper strip, the copper castings are made of high-strength and high-conductivity alloys and processed by rolling. The key technology is high-precision rolling. The magnetic separator of the machine tool must ensure that the thick side and the thin or even extension coefficient are equal, or the shape of the plate can meet the needs of users.

When copper castings are used as vacuum devices, they are required to be oxygen-free copper, which does not deform when soldered with hydrogen. However, it is difficult to achieve the alloying method, so the widely used oxidized particle dispersion strengthening method can be used.

In order to meet the production of large-scale copper castings, the general sand casting method is very difficult to implement. Under this circumstance, the integrity of the model is burned and corroded by the metal melt after the resin sand molding, hot-melt die casting, and metal liquid pouring into the sand type. This results in a large copper casting with a smooth surface and a perfect artistic image.

Large-area missection profile casting skills have also been inevitable. For example, when creating some particularly large bronze statues, it is necessary to cast large-area, thin-walled shaped copper castings. At this time, it is difficult to use general sand casting methods. In recent years, resin sand molding and investment casting have been adopted and carried out at home and abroad. After the molten metal is poured into the sand mold, the model is ablated and filled with metal melting. It has short process flow, smooth appearance of castings and perfect artistic image. .

It seems that it is precisely because of these special processing methods and processes that the drawbacks of traditional casting can be overcome, not only can the casting process be further improved, but also the type of copper castings can be expanded to make it more widely used.