7075 aluminum bar is a high-strength alloy often used in aerospace, defense, and transportation industries. It is known for its excellent strength-to-weight ratio, making it ideal for applications where weight is critical. The bar offers excellent.7075 Aluminum Bar

Processing workpieces involves positioning and clamping on a CNC lathe

The process of positioning the workpiece correctly on the machine tool or fixture is called positioning. Reasonable selection of positioning benchmarks plays an important role in ensuring the dimensional accuracy and mutual positional accuracy of workpieces during the machining process.7075 Aluminum Bar

There are two types of positioning benchmarks: coarse benchmark and fine benchmark. At the beginning of processing, the blank is positioned based on the unprocessed surface, which is called the rough datum; Using the processed surface as the positioning reference plane is called precision reference.7075 Aluminum Bar

1. When selecting a rough base, two basic requirements must be met: first, it should ensure that all machined surfaces have sufficient machining allowance; Secondly, it should be ensured that there is a certain degree of positional accuracy between the machined surface and the non machined surface of the workpiece.7075 Aluminum Bar

2. When there is a requirement for positional accuracy between the machined surface and the unprocessed surface, the unprocessed surface should be selected as the rough reference. Due to certain form and position errors during casting, the unprocessed surface of the inner edge of the handwheel should be selected as the rough reference during the first clamping and turning process to ensure that the thickness a of the wheel rim is basically equal after processing.7075 Aluminum Bar

If the outer circle of the handwheel (machined surface) is chosen as the rough reference, the casting error cannot be eliminated after machining, resulting in significant inconsistency in the thickness of the wheel rim. That is to say, Dongguan CNC precision machining factory should align the inner edge of the handwheel before turning, or use a three jaw self centering chuck to back support the inner edge of the handwheel for turning.7075 Aluminum Bar

7075 Aluminum Bar