Papers by Keyword: NC Lathe

Abstract: Many types of CNC lathes fault generally can be divided into five categories: CNC device fault; servo system fault; tool holder system fault; spindle system fault and other parts fault. Common fault as long as the correct analysis and judgment is not difficult to troubleshoot.

Abstract: The article presents the definition of a new worm type called ZPA (Pseudo-Archimedes’ Worm), generated with standard cylindrical milling tools on NC lathe. First are showed the enveloping calculus for determining the contact line between the tool and the flank of the worm – considering cylindrical generating surfaces. Knowing the contact line, the axial profile can be determined and implicit the flank of worm. Applying some controlled corrections, this worm type can become a standard worm (ZA – for example). This process is assisted by CAD software, developed by the author. The second part approach ZPA worm’s technology: characteristics of the needed NC lathe, processing steps, tools, cutting conditions. The advantages of the ZPA worm type are: the use of standard tools with reduced costs and also short processing time; the possibilities to cover other standard worms, using the standard cylindrical milling tools and non-specialized NC machining tools.

Abstract: Based on the characters of NC lathe and NC grinding machine, the NC grinding machine rebuilding for TG30 NC lathe is studied in this paper. According to the geometric parameters of grinding, choose appropriate TG30 NC lathe, keep the driving system of spindle and the feeding function of two axle linkage of NC lathe, increase the high speed rotating grinding head electric spindle, to realize the one-time processing of inner hole and groove fillet R grinding.

Abstract: Based on a study of the Virtual Reality Technique and Numerical Control Processing Technique, this paper proposes the overall structure of virtual numerical control lathe system. Then the paper, with a combination of the virtual processing system theory, further investigates into the modeling method and machining process of the virtual processing system. By use of the 3DS Max Technique, the paper builds geometrical models of static objects, and builds behavioral models and physical models of dynamic objects by the redrawing technique and particle system method. At last, the paper simulates the whole numerical machining process.

Abstract: Landslide Body, which is a combination part between Knife Tower and Saddle, plays a significant role in the working performance of the NC (numerical control) Lathe. So it is essential to optimize Landslide Body’s structure to improve static and dynamic characteristics. At first, the structure of NC Lathe is introduced. And then, static and dynamic analysis of Landslide Body is carried out before optimization. At the last, optimization process which consists of topology and size optimization is carried out. Based on the optimization results, a new structure of the Landslide Body is generated. It is proved that both static and dynamic characteristics are improved to some extent.

Abstract: HTC 100 CNC lathe is a heavy machine tool. The lathe bed is the important part of the machine tool. The static characteristic of the lathe bed directly influence the machining accuracy and production efficiency of the machine tool. At present, the lathe bed design general depends on the designer’s experience. In this paper, the static analysis of the HTC100 CNC lathe bed is carried out with ANSYS 12.0. The node equivalent stress distribution cloud, the total deformation distribution of Lathe bed and the maximum distortion under various kinds of working conditions are obtained. According to the result, the structure of lathe bed design tends to conservative and the distribution of static stiffness is unreasonable, which is necessary to optimum design.

Abstract: The main task is to study the CNC lathe cutting force signal on-line monitoring system design, it mainly includes the cutting force signal acquisition, real-time monitoring and subsequent processing and analysis. Cutting force signal acquisition is the use of Kistler piezoelectric sensor signal, converted into voltage signal, and through the data acquisition board, to convert analog signals into digital signals, input to the computer, the computer real-time monitoring of machining process. Signal processing is to the acquisition of signal processing and analysis, to obtain the correct dynamic cutting force signal, to verify the stability and reliability of the whole monitoring system.

Abstract: The technique to suppress regenerative chatter is to regulate the spindle speed around the mean speed to disturb the regenerative mechanism. According to the technique, it builds a platform to collect, process the machine working information and output control instruction. On the platform, some advanced algorithms are applied to analyze and finish the control task.

Abstract: The technique to suppress regenerative chatter is to regulate the spindle speed around the mean speed to disturb the regenerative mechanism. According to the technique, it builds a platform to collect, process the machine working information and output control instruction. On the platform, some advanced algorithms are applied to analyze and finish the control task.

Abstract: On the basis of the common thread Nc machining in traditional , it established the Nc processing model of T shape and the fangs type.For processing model, to established related calculation equations (1), feed way [Figure 1], the flow of macros data processing[Figure 4], and determined the basic structure and cutting parameter of the program, based on this, completing the Nc machining of T shape and the fangs type, the establishment of the model are given methods to solve similar parts processing.