Research on NC Machining Programming Technology in the New Era

with the application and development of intelligent technology in the machining industry, the machining industry is gradually transforming from automation to intelligence. The basis of automatic machining comes from the programming of NC machining program. In the new era, CNC machine tools have high requirements for the accuracy and digitization of machining production. Macro programming technology and modularization design are introduced in NC programming. The first part of this paper introduces the NC machining programming technology. The second part analyzes the technical requirements of NC machining programming technology in improving the accuracy of machining parts; the third part discusses the automatic programming technology of NC machining from the perspective of macro programming technology. The purpose is to provide some reference for the application of NC machining coding technology.

Features of calculating the parameters of taps for cutting precise threads on NC- machining technique

The analysis of the features of the taps when cutting precise metric threads by the synchronous method on CNC machines is given. The layout of the tolerance fields of the average diameter of the tap and nut threads is constructed, which allows to ensure the accuracy, controllability and durability of the cutting tool. The formula for calculating the average diameter of the tap thread has been defined.

Simulation of Constant-Volume Removal Rate Machining of Middle-Convex and Varying Ellipse Piston

One kind of constant-volume removal rate machining method of the middle-convex and varying ellipse piston is proposed in this paper. By analyzing the structure and movement relationship of the middle-convex and varying ellipse piston machine, the NC machining model is built. And, the constant-volume removal rate machining model is also built by superposing the variable rotation satisfying the dynamic performance constraints on the uniform rotation of the spindle of the CNC piston lathe. Then, the instantaneous position parameters of each axis of the CNC piston lathe are obtained and turned into NC code. The functional feasibility of the method finally is verified by simulation machining.