What Are Advantages & Disadvantages of Stamping and Machining Technologies

According to statistics, 60 to 70 percent of steel are plates among the world's steel, and most of plates are processed by stamping. Therefore, stamping has inherent advantages. Machining has low processing efficiency, and it is difficult to process parts with complex structures. However, machining is widely used for processing phones. What are the reasons? Stamping and machining are widely applied to metal parts of phones, and what are advantages and disadvantages of stamping and machining processes? We are going to analyse the reasons in this article.

 

Stamping

Stamping uses press machines and molds to apply external force on plates so as to obtain stamping parts with certain shapes, sizes and performance. Stamping is one of the main methods of metal plastic working or press working, and it also belongs to material forming engineering technology.

 

Stamping has high production efficiency, a short production cycle and a wide range of processing sizes. Therefore, stamping processes are adopted for many back covers of phones. Why can’t stamping make cell phones’ small parts like the SIM card tray? Because accuracy of stamping processes can’t meet requirements of cell phones’ SIM card trays yet. If you take a good look at the SIM card tray, you will find that there is a height difference between the partial SIM card tray in order to insert the SIM card. This kind of height difference can not be processed by stamping processes.

 

Machining

Machining refers to the process of changing overall dimensions or performance of a workpiece by mechanical equipment. Machining includes milling, drilling, grinding and cutting. Machining can be classified into manual processing and CNC machining two categories. Manual processing is suitable for small batch and simple parts. CNC Machining (CNC) is an effective process to solve the problems of many varieties, small batches, complex shapes and high precision and to make high efficiency and automatic processing come true.
 

Machining has great flexibility and very high processing accuracy. However, the yield of machining is low, and it is difficult to process parts with complicated structures. 

 

Although machining has low production efficiency, it is adopted for cell phones’ metal middle frames and back covers with high prices and high quality. On the one hand, people have not found a better way to process cell phones; on the other hand, die casting and forging and pressing processes have high efficiency, but their surface treatments such as anodic oxidation are not as good as machining’s. In addition, machining can also be used for secondary processing such as deburring, drilling and surface treatment.