1. for sheet metal processing, there are mainly the following processing methods:

(1) single stamping, that is, a single completion includes: arc distribution, grid holes and other stamping processing.

(2) continuous blanking is divided into the same direction and multiple directions. continuous blanking in the same direction is mostly processed by overlapping dies, which is especially suitable for processing long holes. For multi‑directional continuous blanking, it is more suitable to use small dies for machining large holes.

(3) nibbling processing, using small round mold, small step distance for arc continuous punching processing.

(4) single or continuous forming process, single forming is a sheet metal process of shallow stretching and one forming according to the nature of the mold, but if the forming is larger than the size of the mold, continuous forming process is required.

(5) array forming, this processing method is suitable for processing multiple workpieces on large plates, and the types of workpieces can be the same or different.

2. technological characteristics of numerical control sheet metal processing: the application of numerical control in sheet metal processing shows unique advantages and characteristics, which can be summarized as follows:

(1) Simple and convenient to use, low input cost. It has its own unique advantages in the processing of all kinds of sheet metal parts, especially for the processing of complex shapes or thin plate parts. According to the requirements of the drawings, the holes of different size requirements and shape requirements can be automatically processed, and the larger holes and contour curves of various shapes can be produced and processed in a small step-by-step manner using small punching dies. In addition, the simple structure of the mold can also be processed for sheet metal parts with special processing technology, such as shallow stretching, flanging holes, etc.

(2) Stable product quality and high machining accuracy. For the processed workpiece, it has good flatness, higher punching accuracy, and burr brother, the forming quality is stable, and the product has good consistency.

(3) Effectively improve productivity. The automatic control system can realize the processing of small batch of workpieces and the processing of different parts at the same time, and the processing speed is fast. Because of the reduction of the back of the processing and other aspects of the sheet metal parts of the CNC integrated processing, greatly improving the production down, reducing the production cost input.