经过几十年的发展，计算机数字控制（CNC）已成为机床自动化的主流。并对提高机床的加工精度起了重大作用。各国生产和使用机床的数控化率已成为技术进步程度的标志。我国工程起重机行业，数控机床的应用起步较晚，但发展较快，效果较好。数控机床在我国工程起重机行业的应用主 After decades of development, computer numerical control (CNC) has become the mainstream of machine tool automation. And to improve the machining accuracy played a significant role. The numerical control rate of production and use of machine tools in various countries has become a symbol of the degree of technological progress. China’s construction crane industry, the application of CNC machine tools started later, but the rapid development, the effect is better. CNC machine tools in China’s construction crane main application