Steps and Methods for Programming CNC Wire Cutting Machines

Programming methods for CNC wire cutting machines include manual programming and automatic programming. Currently, the commonly used manual programming formats for CNC wire cutting machines in China are the internationally standardized ISO format and the 3B and 4B formats. Programming steps for CNC wire cutting machines:

(1) Reasonably determine the processing sequence, accurately select the wire hole and electrode wire entry position, and simplify programming.

(2) To determine the coordinate system and simplify calculations during programming, choose the symmetry axis of the graphic as the axis whenever possible.

(3) During programming, calculate the electrode center trajectory and the compensation distance D for the processed shape, where D=R; in the expression, — single-sided discharge gap; R — electrode wire radius.

(4) Divide the electrode wire center trajectory into lines and single arcs, and calculate the coordinate values of the intersection points of each segment based on the average size of the hole or shape.

(5) According to the processing order before and after each segment and the coordinate values of the intersection points, compile the wire cutting program segment by segment.

(6) Fill in the program list.

CNC wire cutting features fast cutting speed, high precision, and good cutting quality. However, with the development of the modern machining industry, the requirements for metal plate cutting quality and cutting accuracy continue to increase, and the functional demands of CNC wire cutting also keep rising. Digital wire cutting must continuously grow to meet market demands. The development of digital wire cutting must meet the requirements of modern machining industry development. By applying it to several typical CNC wire cutting machines, the functions and performance of CNC wire cutting machines have been improved.

Especially domestically, software for automatic conversion of graphical cutting codes based on industrial control computer operating systems and applications, its unique advantages in medium and thick plate cutting and low processing costs, and digital wire cutting as the main force in plate cutting have emerged for a period of time. Moreover, the development space for digital wire cutting remains large in the future.

From the perspective of the social environment, China has not implemented a market economy for a long time, and some small digital wire cutting machine factories are still in the stage of primitive capital accumulation. These factories often lack full production capabilities and can only assemble products. The root cause of quality management throughout the production process does not meet standards, and innovation is even less possible. Given the current situation, the country will eliminate this through market competition.

The emergence of CNC wire cutting technology is a product of the pursuit of "convenience." In the processing process, plate cutting is generally done by manual cutting, semi-automatic cutting machines, and CNC cutting machines. Manual cutting is flexible and convenient, but the quality is poor, dimensional errors are large, material waste is high, subsequent processing workload is heavy, working conditions are poor, and productivity is low. Semi-automatic cutting machines use cutting molds for contour cutting, so they are not suitable for single, small batch, or large batch workpieces, but the processing quality is good. Compared with manual and semi-automatic cutting methods, CNC cutting can effectively improve the efficiency and cutting quality of plate cutting and reduce workers' labor intensity.