circular hole

square hole

Lumbar hole

Irregular hole

blind hole

Stepped hole

threaded hole

etc

Machining refers to the process of changing the shape, size or performance of a workpiece through a mechanical device. According to the different processing methods, Shanghai Paine Technology can be divided into cutting processing and pressure processing. Hot working usually includes heat treatment, forging, casting and welding. The principle of the enterprise is "quality depends on addition, quantity depends on multiplication", and small drill sleeves are the most common substances in machining.